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gstreamer/ext/sctp/usrsctp/usrsctplib/netinet/sctputil.c
Tim-Philipp Müller f4538e24b6 sctp: import internal copy of usrsctp library 
There are problems with global shared state and no API stability
guarantees, and we can't rely on distros shipping the fixes we
need. Both firefox and Chrome bundle their own copies too.

Imported from https://github.com/sctplab/usrsctp,
commit 547d3b46c64876c0336b9eef297fda58dbe1adaf
Date: Thu Jul 23 21:49:32 2020 +0200

Fixes https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/issues/870

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/1465>
2020-08-14 01:32:45 +01:00

8695 lines
243 KiB
C
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/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
* Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
* Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* a) Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* b) Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the distribution.
*
* c) Neither the name of Cisco Systems, Inc. nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#if defined(__FreeBSD__) && !defined(__Userspace__)
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: head/sys/netinet/sctputil.c 363323 2020-07-19 12:34:19Z tuexen $");
#endif
#include <netinet/sctp_os.h>
#include <netinet/sctp_pcb.h>
#include <netinet/sctputil.h>
#include <netinet/sctp_var.h>
#include <netinet/sctp_sysctl.h>
#ifdef INET6
#if defined(__Userspace__) || defined(__FreeBSD__)
#include <netinet6/sctp6_var.h>
#endif
#endif
#include <netinet/sctp_header.h>
#include <netinet/sctp_output.h>
#include <netinet/sctp_uio.h>
#include <netinet/sctp_timer.h>
#include <netinet/sctp_indata.h>
#include <netinet/sctp_auth.h>
#include <netinet/sctp_asconf.h>
#include <netinet/sctp_bsd_addr.h>
#if defined(__Userspace__)
#include <netinet/sctp_constants.h>
#endif
#if defined(__FreeBSD__) && !defined(__Userspace__)
#include <netinet/sctp_kdtrace.h>
#if defined(INET6) || defined(INET)
#include <netinet/tcp_var.h>
#endif
#include <netinet/udp.h>
#include <netinet/udp_var.h>
#include <sys/proc.h>
#ifdef INET6
#include <netinet/icmp6.h>
#endif
#endif
#if defined(_WIN32) && !defined(__Userspace__)
#if !defined(SCTP_LOCAL_TRACE_BUF)
#include "eventrace_netinet.h"
#include "sctputil.tmh" /* this is the file that will be auto generated */
#endif
#else
#ifndef KTR_SCTP
#define KTR_SCTP KTR_SUBSYS
#endif
#endif
extern const struct sctp_cc_functions sctp_cc_functions[];
extern const struct sctp_ss_functions sctp_ss_functions[];
void
sctp_sblog(struct sockbuf *sb, struct sctp_tcb *stcb, int from, int incr)
{
#if defined(SCTP_LOCAL_TRACE_BUF)
struct sctp_cwnd_log sctp_clog;
sctp_clog.x.sb.stcb = stcb;
sctp_clog.x.sb.so_sbcc = sb->sb_cc;
if (stcb)
sctp_clog.x.sb.stcb_sbcc = stcb->asoc.sb_cc;
else
sctp_clog.x.sb.stcb_sbcc = 0;
sctp_clog.x.sb.incr = incr;
SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
SCTP_LOG_EVENT_SB,
from,
sctp_clog.x.misc.log1,
sctp_clog.x.misc.log2,
sctp_clog.x.misc.log3,
sctp_clog.x.misc.log4);
#endif
}
void
sctp_log_closing(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int16_t loc)
{
#if defined(SCTP_LOCAL_TRACE_BUF)
struct sctp_cwnd_log sctp_clog;
sctp_clog.x.close.inp = (void *)inp;
sctp_clog.x.close.sctp_flags = inp->sctp_flags;
if (stcb) {
sctp_clog.x.close.stcb = (void *)stcb;
sctp_clog.x.close.state = (uint16_t)stcb->asoc.state;
} else {
sctp_clog.x.close.stcb = 0;
sctp_clog.x.close.state = 0;
}
sctp_clog.x.close.loc = loc;
SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
SCTP_LOG_EVENT_CLOSE,
0,
sctp_clog.x.misc.log1,
sctp_clog.x.misc.log2,
sctp_clog.x.misc.log3,
sctp_clog.x.misc.log4);
#endif
}
void
rto_logging(struct sctp_nets *net, int from)
{
#if defined(SCTP_LOCAL_TRACE_BUF)
struct sctp_cwnd_log sctp_clog;
memset(&sctp_clog, 0, sizeof(sctp_clog));
sctp_clog.x.rto.net = (void *) net;
sctp_clog.x.rto.rtt = net->rtt / 1000;
SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
SCTP_LOG_EVENT_RTT,
from,
sctp_clog.x.misc.log1,
sctp_clog.x.misc.log2,
sctp_clog.x.misc.log3,
sctp_clog.x.misc.log4);
#endif
}
void
sctp_log_strm_del_alt(struct sctp_tcb *stcb, uint32_t tsn, uint16_t sseq, uint16_t stream, int from)
{
#if defined(SCTP_LOCAL_TRACE_BUF)
struct sctp_cwnd_log sctp_clog;
sctp_clog.x.strlog.stcb = stcb;
sctp_clog.x.strlog.n_tsn = tsn;
sctp_clog.x.strlog.n_sseq = sseq;
sctp_clog.x.strlog.e_tsn = 0;
sctp_clog.x.strlog.e_sseq = 0;
sctp_clog.x.strlog.strm = stream;
SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
SCTP_LOG_EVENT_STRM,
from,
sctp_clog.x.misc.log1,
sctp_clog.x.misc.log2,
sctp_clog.x.misc.log3,
sctp_clog.x.misc.log4);
#endif
}
void
sctp_log_nagle_event(struct sctp_tcb *stcb, int action)
{
#if defined(SCTP_LOCAL_TRACE_BUF)
struct sctp_cwnd_log sctp_clog;
sctp_clog.x.nagle.stcb = (void *)stcb;
sctp_clog.x.nagle.total_flight = stcb->asoc.total_flight;
sctp_clog.x.nagle.total_in_queue = stcb->asoc.total_output_queue_size;
sctp_clog.x.nagle.count_in_queue = stcb->asoc.chunks_on_out_queue;
sctp_clog.x.nagle.count_in_flight = stcb->asoc.total_flight_count;
SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
SCTP_LOG_EVENT_NAGLE,
action,
sctp_clog.x.misc.log1,
sctp_clog.x.misc.log2,
sctp_clog.x.misc.log3,
sctp_clog.x.misc.log4);
#endif
}
void
sctp_log_sack(uint32_t old_cumack, uint32_t cumack, uint32_t tsn, uint16_t gaps, uint16_t dups, int from)
{
#if defined(SCTP_LOCAL_TRACE_BUF)
struct sctp_cwnd_log sctp_clog;
sctp_clog.x.sack.cumack = cumack;
sctp_clog.x.sack.oldcumack = old_cumack;
sctp_clog.x.sack.tsn = tsn;
sctp_clog.x.sack.numGaps = gaps;
sctp_clog.x.sack.numDups = dups;
SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
SCTP_LOG_EVENT_SACK,
from,
sctp_clog.x.misc.log1,
sctp_clog.x.misc.log2,
sctp_clog.x.misc.log3,
sctp_clog.x.misc.log4);
#endif
}
void
sctp_log_map(uint32_t map, uint32_t cum, uint32_t high, int from)
{
#if defined(SCTP_LOCAL_TRACE_BUF)
struct sctp_cwnd_log sctp_clog;
memset(&sctp_clog, 0, sizeof(sctp_clog));
sctp_clog.x.map.base = map;
sctp_clog.x.map.cum = cum;
sctp_clog.x.map.high = high;
SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
SCTP_LOG_EVENT_MAP,
from,
sctp_clog.x.misc.log1,
sctp_clog.x.misc.log2,
sctp_clog.x.misc.log3,
sctp_clog.x.misc.log4);
#endif
}
void
sctp_log_fr(uint32_t biggest_tsn, uint32_t biggest_new_tsn, uint32_t tsn, int from)
{
#if defined(SCTP_LOCAL_TRACE_BUF)
struct sctp_cwnd_log sctp_clog;
memset(&sctp_clog, 0, sizeof(sctp_clog));
sctp_clog.x.fr.largest_tsn = biggest_tsn;
sctp_clog.x.fr.largest_new_tsn = biggest_new_tsn;
sctp_clog.x.fr.tsn = tsn;
SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
SCTP_LOG_EVENT_FR,
from,
sctp_clog.x.misc.log1,
sctp_clog.x.misc.log2,
sctp_clog.x.misc.log3,
sctp_clog.x.misc.log4);
#endif
}
#ifdef SCTP_MBUF_LOGGING
void
sctp_log_mb(struct mbuf *m, int from)
{
#if defined(SCTP_LOCAL_TRACE_BUF)
struct sctp_cwnd_log sctp_clog;
sctp_clog.x.mb.mp = m;
sctp_clog.x.mb.mbuf_flags = (uint8_t)(SCTP_BUF_GET_FLAGS(m));
sctp_clog.x.mb.size = (uint16_t)(SCTP_BUF_LEN(m));
sctp_clog.x.mb.data = SCTP_BUF_AT(m, 0);
if (SCTP_BUF_IS_EXTENDED(m)) {
sctp_clog.x.mb.ext = SCTP_BUF_EXTEND_BASE(m);
#if defined(__APPLE__) && !defined(__Userspace__)
/* APPLE does not use a ref_cnt, but a forward/backward ref queue */
#else
sctp_clog.x.mb.refcnt = (uint8_t)(SCTP_BUF_EXTEND_REFCNT(m));
#endif
} else {
sctp_clog.x.mb.ext = 0;
sctp_clog.x.mb.refcnt = 0;
}
SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
SCTP_LOG_EVENT_MBUF,
from,
sctp_clog.x.misc.log1,
sctp_clog.x.misc.log2,
sctp_clog.x.misc.log3,
sctp_clog.x.misc.log4);
#endif
}
void
sctp_log_mbc(struct mbuf *m, int from)
{
struct mbuf *mat;
for (mat = m; mat; mat = SCTP_BUF_NEXT(mat)) {
sctp_log_mb(mat, from);
}
}
#endif
void
sctp_log_strm_del(struct sctp_queued_to_read *control, struct sctp_queued_to_read *poschk, int from)
{
#if defined(SCTP_LOCAL_TRACE_BUF)
struct sctp_cwnd_log sctp_clog;
if (control == NULL) {
SCTP_PRINTF("Gak log of NULL?\n");
return;
}
sctp_clog.x.strlog.stcb = control->stcb;
sctp_clog.x.strlog.n_tsn = control->sinfo_tsn;
sctp_clog.x.strlog.n_sseq = (uint16_t)control->mid;
sctp_clog.x.strlog.strm = control->sinfo_stream;
if (poschk != NULL) {
sctp_clog.x.strlog.e_tsn = poschk->sinfo_tsn;
sctp_clog.x.strlog.e_sseq = (uint16_t)poschk->mid;
} else {
sctp_clog.x.strlog.e_tsn = 0;
sctp_clog.x.strlog.e_sseq = 0;
}
SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
SCTP_LOG_EVENT_STRM,
from,
sctp_clog.x.misc.log1,
sctp_clog.x.misc.log2,
sctp_clog.x.misc.log3,
sctp_clog.x.misc.log4);
#endif
}
void
sctp_log_cwnd(struct sctp_tcb *stcb, struct sctp_nets *net, int augment, uint8_t from)
{
#if defined(SCTP_LOCAL_TRACE_BUF)
struct sctp_cwnd_log sctp_clog;
sctp_clog.x.cwnd.net = net;
if (stcb->asoc.send_queue_cnt > 255)
sctp_clog.x.cwnd.cnt_in_send = 255;
else
sctp_clog.x.cwnd.cnt_in_send = stcb->asoc.send_queue_cnt;
if (stcb->asoc.stream_queue_cnt > 255)
sctp_clog.x.cwnd.cnt_in_str = 255;
else
sctp_clog.x.cwnd.cnt_in_str = stcb->asoc.stream_queue_cnt;
if (net) {
sctp_clog.x.cwnd.cwnd_new_value = net->cwnd;
sctp_clog.x.cwnd.inflight = net->flight_size;
sctp_clog.x.cwnd.pseudo_cumack = net->pseudo_cumack;
sctp_clog.x.cwnd.meets_pseudo_cumack = net->new_pseudo_cumack;
sctp_clog.x.cwnd.need_new_pseudo_cumack = net->find_pseudo_cumack;
}
if (SCTP_CWNDLOG_PRESEND == from) {
sctp_clog.x.cwnd.meets_pseudo_cumack = stcb->asoc.peers_rwnd;
}
sctp_clog.x.cwnd.cwnd_augment = augment;
SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
SCTP_LOG_EVENT_CWND,
from,
sctp_clog.x.misc.log1,
sctp_clog.x.misc.log2,
sctp_clog.x.misc.log3,
sctp_clog.x.misc.log4);
#endif
}
#if !defined(__APPLE__) && !defined(__Userspace__)
void
sctp_log_lock(struct sctp_inpcb *inp, struct sctp_tcb *stcb, uint8_t from)
{
#if defined(SCTP_LOCAL_TRACE_BUF)
struct sctp_cwnd_log sctp_clog;
memset(&sctp_clog, 0, sizeof(sctp_clog));
if (inp) {
sctp_clog.x.lock.sock = (void *) inp->sctp_socket;
} else {
sctp_clog.x.lock.sock = (void *) NULL;
}
sctp_clog.x.lock.inp = (void *) inp;
#if defined(__FreeBSD__)
if (stcb) {
sctp_clog.x.lock.tcb_lock = mtx_owned(&stcb->tcb_mtx);
} else {
sctp_clog.x.lock.tcb_lock = SCTP_LOCK_UNKNOWN;
}
if (inp) {
sctp_clog.x.lock.inp_lock = mtx_owned(&inp->inp_mtx);
sctp_clog.x.lock.create_lock = mtx_owned(&inp->inp_create_mtx);
} else {
sctp_clog.x.lock.inp_lock = SCTP_LOCK_UNKNOWN;
sctp_clog.x.lock.create_lock = SCTP_LOCK_UNKNOWN;
}
sctp_clog.x.lock.info_lock = rw_wowned(&SCTP_BASE_INFO(ipi_ep_mtx));
if (inp && (inp->sctp_socket)) {
sctp_clog.x.lock.sock_lock = mtx_owned(&(inp->sctp_socket->so_rcv.sb_mtx));
sctp_clog.x.lock.sockrcvbuf_lock = mtx_owned(&(inp->sctp_socket->so_rcv.sb_mtx));
sctp_clog.x.lock.socksndbuf_lock = mtx_owned(&(inp->sctp_socket->so_snd.sb_mtx));
} else {
sctp_clog.x.lock.sock_lock = SCTP_LOCK_UNKNOWN;
sctp_clog.x.lock.sockrcvbuf_lock = SCTP_LOCK_UNKNOWN;
sctp_clog.x.lock.socksndbuf_lock = SCTP_LOCK_UNKNOWN;
}
#endif
SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
SCTP_LOG_LOCK_EVENT,
from,
sctp_clog.x.misc.log1,
sctp_clog.x.misc.log2,
sctp_clog.x.misc.log3,
sctp_clog.x.misc.log4);
#endif
}
#endif
void
sctp_log_maxburst(struct sctp_tcb *stcb, struct sctp_nets *net, int error, int burst, uint8_t from)
{
#if defined(SCTP_LOCAL_TRACE_BUF)
struct sctp_cwnd_log sctp_clog;
memset(&sctp_clog, 0, sizeof(sctp_clog));
sctp_clog.x.cwnd.net = net;
sctp_clog.x.cwnd.cwnd_new_value = error;
sctp_clog.x.cwnd.inflight = net->flight_size;
sctp_clog.x.cwnd.cwnd_augment = burst;
if (stcb->asoc.send_queue_cnt > 255)
sctp_clog.x.cwnd.cnt_in_send = 255;
else
sctp_clog.x.cwnd.cnt_in_send = stcb->asoc.send_queue_cnt;
if (stcb->asoc.stream_queue_cnt > 255)
sctp_clog.x.cwnd.cnt_in_str = 255;
else
sctp_clog.x.cwnd.cnt_in_str = stcb->asoc.stream_queue_cnt;
SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
SCTP_LOG_EVENT_MAXBURST,
from,
sctp_clog.x.misc.log1,
sctp_clog.x.misc.log2,
sctp_clog.x.misc.log3,
sctp_clog.x.misc.log4);
#endif
}
void
sctp_log_rwnd(uint8_t from, uint32_t peers_rwnd, uint32_t snd_size, uint32_t overhead)
{
#if defined(SCTP_LOCAL_TRACE_BUF)
struct sctp_cwnd_log sctp_clog;
sctp_clog.x.rwnd.rwnd = peers_rwnd;
sctp_clog.x.rwnd.send_size = snd_size;
sctp_clog.x.rwnd.overhead = overhead;
sctp_clog.x.rwnd.new_rwnd = 0;
SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
SCTP_LOG_EVENT_RWND,
from,
sctp_clog.x.misc.log1,
sctp_clog.x.misc.log2,
sctp_clog.x.misc.log3,
sctp_clog.x.misc.log4);
#endif
}
void
sctp_log_rwnd_set(uint8_t from, uint32_t peers_rwnd, uint32_t flight_size, uint32_t overhead, uint32_t a_rwndval)
{
#if defined(SCTP_LOCAL_TRACE_BUF)
struct sctp_cwnd_log sctp_clog;
sctp_clog.x.rwnd.rwnd = peers_rwnd;
sctp_clog.x.rwnd.send_size = flight_size;
sctp_clog.x.rwnd.overhead = overhead;
sctp_clog.x.rwnd.new_rwnd = a_rwndval;
SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
SCTP_LOG_EVENT_RWND,
from,
sctp_clog.x.misc.log1,
sctp_clog.x.misc.log2,
sctp_clog.x.misc.log3,
sctp_clog.x.misc.log4);
#endif
}
#ifdef SCTP_MBCNT_LOGGING
static void
sctp_log_mbcnt(uint8_t from, uint32_t total_oq, uint32_t book, uint32_t total_mbcnt_q, uint32_t mbcnt)
{
#if defined(SCTP_LOCAL_TRACE_BUF)
struct sctp_cwnd_log sctp_clog;
sctp_clog.x.mbcnt.total_queue_size = total_oq;
sctp_clog.x.mbcnt.size_change = book;
sctp_clog.x.mbcnt.total_queue_mb_size = total_mbcnt_q;
sctp_clog.x.mbcnt.mbcnt_change = mbcnt;
SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
SCTP_LOG_EVENT_MBCNT,
from,
sctp_clog.x.misc.log1,
sctp_clog.x.misc.log2,
sctp_clog.x.misc.log3,
sctp_clog.x.misc.log4);
#endif
}
#endif
void
sctp_misc_ints(uint8_t from, uint32_t a, uint32_t b, uint32_t c, uint32_t d)
{
#if defined(SCTP_LOCAL_TRACE_BUF)
SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
SCTP_LOG_MISC_EVENT,
from,
a, b, c, d);
#endif
}
void
sctp_wakeup_log(struct sctp_tcb *stcb, uint32_t wake_cnt, int from)
{
#if defined(SCTP_LOCAL_TRACE_BUF)
struct sctp_cwnd_log sctp_clog;
sctp_clog.x.wake.stcb = (void *)stcb;
sctp_clog.x.wake.wake_cnt = wake_cnt;
sctp_clog.x.wake.flight = stcb->asoc.total_flight_count;
sctp_clog.x.wake.send_q = stcb->asoc.send_queue_cnt;
sctp_clog.x.wake.sent_q = stcb->asoc.sent_queue_cnt;
if (stcb->asoc.stream_queue_cnt < 0xff)
sctp_clog.x.wake.stream_qcnt = (uint8_t) stcb->asoc.stream_queue_cnt;
else
sctp_clog.x.wake.stream_qcnt = 0xff;
if (stcb->asoc.chunks_on_out_queue < 0xff)
sctp_clog.x.wake.chunks_on_oque = (uint8_t) stcb->asoc.chunks_on_out_queue;
else
sctp_clog.x.wake.chunks_on_oque = 0xff;
sctp_clog.x.wake.sctpflags = 0;
/* set in the defered mode stuff */
if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_DONT_WAKE)
sctp_clog.x.wake.sctpflags |= 1;
if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_WAKEOUTPUT)
sctp_clog.x.wake.sctpflags |= 2;
if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_WAKEINPUT)
sctp_clog.x.wake.sctpflags |= 4;
/* what about the sb */
if (stcb->sctp_socket) {
struct socket *so = stcb->sctp_socket;
sctp_clog.x.wake.sbflags = (uint8_t)((so->so_snd.sb_flags & 0x00ff));
} else {
sctp_clog.x.wake.sbflags = 0xff;
}
SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
SCTP_LOG_EVENT_WAKE,
from,
sctp_clog.x.misc.log1,
sctp_clog.x.misc.log2,
sctp_clog.x.misc.log3,
sctp_clog.x.misc.log4);
#endif
}
void
sctp_log_block(uint8_t from, struct sctp_association *asoc, ssize_t sendlen)
{
#if defined(SCTP_LOCAL_TRACE_BUF)
struct sctp_cwnd_log sctp_clog;
sctp_clog.x.blk.onsb = asoc->total_output_queue_size;
sctp_clog.x.blk.send_sent_qcnt = (uint16_t) (asoc->send_queue_cnt + asoc->sent_queue_cnt);
sctp_clog.x.blk.peer_rwnd = asoc->peers_rwnd;
sctp_clog.x.blk.stream_qcnt = (uint16_t) asoc->stream_queue_cnt;
sctp_clog.x.blk.chunks_on_oque = (uint16_t) asoc->chunks_on_out_queue;
sctp_clog.x.blk.flight_size = (uint16_t) (asoc->total_flight/1024);
sctp_clog.x.blk.sndlen = (uint32_t)sendlen;
SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
SCTP_LOG_EVENT_BLOCK,
from,
sctp_clog.x.misc.log1,
sctp_clog.x.misc.log2,
sctp_clog.x.misc.log3,
sctp_clog.x.misc.log4);
#endif
}
int
sctp_fill_stat_log(void *optval SCTP_UNUSED, size_t *optsize SCTP_UNUSED)
{
/* May need to fix this if ktrdump does not work */
return (0);
}
#ifdef SCTP_AUDITING_ENABLED
uint8_t sctp_audit_data[SCTP_AUDIT_SIZE][2];
static int sctp_audit_indx = 0;
static
void
sctp_print_audit_report(void)
{
int i;
int cnt;
cnt = 0;
for (i = sctp_audit_indx; i < SCTP_AUDIT_SIZE; i++) {
if ((sctp_audit_data[i][0] == 0xe0) &&
(sctp_audit_data[i][1] == 0x01)) {
cnt = 0;
SCTP_PRINTF("\n");
} else if (sctp_audit_data[i][0] == 0xf0) {
cnt = 0;
SCTP_PRINTF("\n");
} else if ((sctp_audit_data[i][0] == 0xc0) &&
(sctp_audit_data[i][1] == 0x01)) {
SCTP_PRINTF("\n");
cnt = 0;
}
SCTP_PRINTF("%2.2x%2.2x ", (uint32_t) sctp_audit_data[i][0],
(uint32_t) sctp_audit_data[i][1]);
cnt++;
if ((cnt % 14) == 0)
SCTP_PRINTF("\n");
}
for (i = 0; i < sctp_audit_indx; i++) {
if ((sctp_audit_data[i][0] == 0xe0) &&
(sctp_audit_data[i][1] == 0x01)) {
cnt = 0;
SCTP_PRINTF("\n");
} else if (sctp_audit_data[i][0] == 0xf0) {
cnt = 0;
SCTP_PRINTF("\n");
} else if ((sctp_audit_data[i][0] == 0xc0) &&
(sctp_audit_data[i][1] == 0x01)) {
SCTP_PRINTF("\n");
cnt = 0;
}
SCTP_PRINTF("%2.2x%2.2x ", (uint32_t) sctp_audit_data[i][0],
(uint32_t) sctp_audit_data[i][1]);
cnt++;
if ((cnt % 14) == 0)
SCTP_PRINTF("\n");
}
SCTP_PRINTF("\n");
}
void
sctp_auditing(int from, struct sctp_inpcb *inp, struct sctp_tcb *stcb,
struct sctp_nets *net)
{
int resend_cnt, tot_out, rep, tot_book_cnt;
struct sctp_nets *lnet;
struct sctp_tmit_chunk *chk;
sctp_audit_data[sctp_audit_indx][0] = 0xAA;
sctp_audit_data[sctp_audit_indx][1] = 0x000000ff & from;
sctp_audit_indx++;
if (sctp_audit_indx >= SCTP_AUDIT_SIZE) {
sctp_audit_indx = 0;
}
if (inp == NULL) {
sctp_audit_data[sctp_audit_indx][0] = 0xAF;
sctp_audit_data[sctp_audit_indx][1] = 0x01;
sctp_audit_indx++;
if (sctp_audit_indx >= SCTP_AUDIT_SIZE) {
sctp_audit_indx = 0;
}
return;
}
if (stcb == NULL) {
sctp_audit_data[sctp_audit_indx][0] = 0xAF;
sctp_audit_data[sctp_audit_indx][1] = 0x02;
sctp_audit_indx++;
if (sctp_audit_indx >= SCTP_AUDIT_SIZE) {
sctp_audit_indx = 0;
}
return;
}
sctp_audit_data[sctp_audit_indx][0] = 0xA1;
sctp_audit_data[sctp_audit_indx][1] =
(0x000000ff & stcb->asoc.sent_queue_retran_cnt);
sctp_audit_indx++;
if (sctp_audit_indx >= SCTP_AUDIT_SIZE) {
sctp_audit_indx = 0;
}
rep = 0;
tot_book_cnt = 0;
resend_cnt = tot_out = 0;
TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
if (chk->sent == SCTP_DATAGRAM_RESEND) {
resend_cnt++;
} else if (chk->sent < SCTP_DATAGRAM_RESEND) {
tot_out += chk->book_size;
tot_book_cnt++;
}
}
if (resend_cnt != stcb->asoc.sent_queue_retran_cnt) {
sctp_audit_data[sctp_audit_indx][0] = 0xAF;
sctp_audit_data[sctp_audit_indx][1] = 0xA1;
sctp_audit_indx++;
if (sctp_audit_indx >= SCTP_AUDIT_SIZE) {
sctp_audit_indx = 0;
}
SCTP_PRINTF("resend_cnt:%d asoc-tot:%d\n",
resend_cnt, stcb->asoc.sent_queue_retran_cnt);
rep = 1;
stcb->asoc.sent_queue_retran_cnt = resend_cnt;
sctp_audit_data[sctp_audit_indx][0] = 0xA2;
sctp_audit_data[sctp_audit_indx][1] =
(0x000000ff & stcb->asoc.sent_queue_retran_cnt);
sctp_audit_indx++;
if (sctp_audit_indx >= SCTP_AUDIT_SIZE) {
sctp_audit_indx = 0;
}
}
if (tot_out != stcb->asoc.total_flight) {
sctp_audit_data[sctp_audit_indx][0] = 0xAF;
sctp_audit_data[sctp_audit_indx][1] = 0xA2;
sctp_audit_indx++;
if (sctp_audit_indx >= SCTP_AUDIT_SIZE) {
sctp_audit_indx = 0;
}
rep = 1;
SCTP_PRINTF("tot_flt:%d asoc_tot:%d\n", tot_out,
(int)stcb->asoc.total_flight);
stcb->asoc.total_flight = tot_out;
}
if (tot_book_cnt != stcb->asoc.total_flight_count) {
sctp_audit_data[sctp_audit_indx][0] = 0xAF;
sctp_audit_data[sctp_audit_indx][1] = 0xA5;
sctp_audit_indx++;
if (sctp_audit_indx >= SCTP_AUDIT_SIZE) {
sctp_audit_indx = 0;
}
rep = 1;
SCTP_PRINTF("tot_flt_book:%d\n", tot_book_cnt);
stcb->asoc.total_flight_count = tot_book_cnt;
}
tot_out = 0;
TAILQ_FOREACH(lnet, &stcb->asoc.nets, sctp_next) {
tot_out += lnet->flight_size;
}
if (tot_out != stcb->asoc.total_flight) {
sctp_audit_data[sctp_audit_indx][0] = 0xAF;
sctp_audit_data[sctp_audit_indx][1] = 0xA3;
sctp_audit_indx++;
if (sctp_audit_indx >= SCTP_AUDIT_SIZE) {
sctp_audit_indx = 0;
}
rep = 1;
SCTP_PRINTF("real flight:%d net total was %d\n",
stcb->asoc.total_flight, tot_out);
/* now corrective action */
TAILQ_FOREACH(lnet, &stcb->asoc.nets, sctp_next) {
tot_out = 0;
TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
if ((chk->whoTo == lnet) &&
(chk->sent < SCTP_DATAGRAM_RESEND)) {
tot_out += chk->book_size;
}
}
if (lnet->flight_size != tot_out) {
SCTP_PRINTF("net:%p flight was %d corrected to %d\n",
(void *)lnet, lnet->flight_size,
tot_out);
lnet->flight_size = tot_out;
}
}
}
if (rep) {
sctp_print_audit_report();
}
}
void
sctp_audit_log(uint8_t ev, uint8_t fd)
{
sctp_audit_data[sctp_audit_indx][0] = ev;
sctp_audit_data[sctp_audit_indx][1] = fd;
sctp_audit_indx++;
if (sctp_audit_indx >= SCTP_AUDIT_SIZE) {
sctp_audit_indx = 0;
}
}
#endif
/*
* The conversion from time to ticks and vice versa is done by rounding
* upwards. This way we can test in the code the time to be positive and
* know that this corresponds to a positive number of ticks.
*/
uint32_t
sctp_msecs_to_ticks(uint32_t msecs)
{
uint64_t temp;
uint32_t ticks;
if (hz == 1000) {
ticks = msecs;
} else {
temp = (((uint64_t)msecs * hz) + 999) / 1000;
if (temp > UINT32_MAX) {
ticks = UINT32_MAX;
} else {
ticks = (uint32_t)temp;
}
}
return (ticks);
}
uint32_t
sctp_ticks_to_msecs(uint32_t ticks)
{
uint64_t temp;
uint32_t msecs;
if (hz == 1000) {
msecs = ticks;
} else {
temp = (((uint64_t)ticks * 1000) + (hz - 1)) / hz;
if (temp > UINT32_MAX) {
msecs = UINT32_MAX;
} else {
msecs = (uint32_t)temp;
}
}
return (msecs);
}
uint32_t
sctp_secs_to_ticks(uint32_t secs)
{
uint64_t temp;
uint32_t ticks;
temp = (uint64_t)secs * hz;
if (temp > UINT32_MAX) {
ticks = UINT32_MAX;
} else {
ticks = (uint32_t)temp;
}
return (ticks);
}
uint32_t
sctp_ticks_to_secs(uint32_t ticks)
{
uint64_t temp;
uint32_t secs;
temp = ((uint64_t)ticks + (hz - 1)) / hz;
if (temp > UINT32_MAX) {
secs = UINT32_MAX;
} else {
secs = (uint32_t)temp;
}
return (secs);
}
/*
* sctp_stop_timers_for_shutdown() should be called
* when entering the SHUTDOWN_SENT or SHUTDOWN_ACK_SENT
* state to make sure that all timers are stopped.
*/
void
sctp_stop_timers_for_shutdown(struct sctp_tcb *stcb)
{
struct sctp_inpcb *inp;
struct sctp_nets *net;
inp = stcb->sctp_ep;
sctp_timer_stop(SCTP_TIMER_TYPE_RECV, inp, stcb, NULL,
SCTP_FROM_SCTPUTIL + SCTP_LOC_12);
sctp_timer_stop(SCTP_TIMER_TYPE_STRRESET, inp, stcb, NULL,
SCTP_FROM_SCTPUTIL + SCTP_LOC_13);
sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, inp, stcb, NULL,
SCTP_FROM_SCTPUTIL + SCTP_LOC_14);
sctp_timer_stop(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb, NULL,
SCTP_FROM_SCTPUTIL + SCTP_LOC_15);
TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net,
SCTP_FROM_SCTPUTIL + SCTP_LOC_16);
sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net,
SCTP_FROM_SCTPUTIL + SCTP_LOC_17);
}
}
void
sctp_stop_association_timers(struct sctp_tcb *stcb, bool stop_assoc_kill_timer)
{
struct sctp_inpcb *inp;
struct sctp_nets *net;
inp = stcb->sctp_ep;
sctp_timer_stop(SCTP_TIMER_TYPE_RECV, inp, stcb, NULL,
SCTP_FROM_SCTPUTIL + SCTP_LOC_18);
sctp_timer_stop(SCTP_TIMER_TYPE_STRRESET, inp, stcb, NULL,
SCTP_FROM_SCTPUTIL + SCTP_LOC_19);
if (stop_assoc_kill_timer) {
sctp_timer_stop(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL,
SCTP_FROM_SCTPUTIL + SCTP_LOC_20);
}
sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, inp, stcb, NULL,
SCTP_FROM_SCTPUTIL + SCTP_LOC_21);
sctp_timer_stop(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb, NULL,
SCTP_FROM_SCTPUTIL + SCTP_LOC_22);
sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWNGUARD, inp, stcb, NULL,
SCTP_FROM_SCTPUTIL + SCTP_LOC_23);
/* Mobility adaptation */
sctp_timer_stop(SCTP_TIMER_TYPE_PRIM_DELETED, inp, stcb, NULL,
SCTP_FROM_SCTPUTIL + SCTP_LOC_24);
TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
sctp_timer_stop(SCTP_TIMER_TYPE_SEND, inp, stcb, net,
SCTP_FROM_SCTPUTIL + SCTP_LOC_25);
sctp_timer_stop(SCTP_TIMER_TYPE_INIT, inp, stcb, net,
SCTP_FROM_SCTPUTIL + SCTP_LOC_26);
sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWN, inp, stcb, net,
SCTP_FROM_SCTPUTIL + SCTP_LOC_27);
sctp_timer_stop(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net,
SCTP_FROM_SCTPUTIL + SCTP_LOC_28);
sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWNACK, inp, stcb, net,
SCTP_FROM_SCTPUTIL + SCTP_LOC_29);
sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net,
SCTP_FROM_SCTPUTIL + SCTP_LOC_30);
sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net,
SCTP_FROM_SCTPUTIL + SCTP_LOC_31);
}
}
/*
* A list of sizes based on typical mtu's, used only if next hop size not
* returned. These values MUST be multiples of 4 and MUST be ordered.
*/
static uint32_t sctp_mtu_sizes[] = {
68,
296,
508,
512,
544,
576,
1004,
1492,
1500,
1536,
2000,
2048,
4352,
4464,
8168,
17912,
32000,
65532
};
/*
* Return the largest MTU in sctp_mtu_sizes smaller than val.
* If val is smaller than the minimum, just return the largest
* multiple of 4 smaller or equal to val.
* Ensure that the result is a multiple of 4.
*/
uint32_t
sctp_get_prev_mtu(uint32_t val)
{
uint32_t i;
val &= 0xfffffffc;
if (val <= sctp_mtu_sizes[0]) {
return (val);
}
for (i = 1; i < (sizeof(sctp_mtu_sizes) / sizeof(uint32_t)); i++) {
if (val <= sctp_mtu_sizes[i]) {
break;
}
}
KASSERT((sctp_mtu_sizes[i - 1] & 0x00000003) == 0,
("sctp_mtu_sizes[%u] not a multiple of 4", i - 1));
return (sctp_mtu_sizes[i - 1]);
}
/*
* Return the smallest MTU in sctp_mtu_sizes larger than val.
* If val is larger than the maximum, just return the largest multiple of 4 smaller
* or equal to val.
* Ensure that the result is a multiple of 4.
*/
uint32_t
sctp_get_next_mtu(uint32_t val)
{
/* select another MTU that is just bigger than this one */
uint32_t i;
val &= 0xfffffffc;
for (i = 0; i < (sizeof(sctp_mtu_sizes) / sizeof(uint32_t)); i++) {
if (val < sctp_mtu_sizes[i]) {
KASSERT((sctp_mtu_sizes[i] & 0x00000003) == 0,
("sctp_mtu_sizes[%u] not a multiple of 4", i));
return (sctp_mtu_sizes[i]);
}
}
return (val);
}
void
sctp_fill_random_store(struct sctp_pcb *m)
{
/*
* Here we use the MD5/SHA-1 to hash with our good randomNumbers and
* our counter. The result becomes our good random numbers and we
* then setup to give these out. Note that we do no locking to
* protect this. This is ok, since if competing folks call this we
* will get more gobbled gook in the random store which is what we
* want. There is a danger that two guys will use the same random
* numbers, but thats ok too since that is random as well :->
*/
m->store_at = 0;
#if defined(__Userspace__) && defined(FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION)
for (int i = 0; i < (int) (sizeof(m->random_store) / sizeof(m->random_store[0])); i++) {
m->random_store[i] = (uint8_t) rand();
}
#else
(void)sctp_hmac(SCTP_HMAC, (uint8_t *)m->random_numbers,
sizeof(m->random_numbers), (uint8_t *)&m->random_counter,
sizeof(m->random_counter), (uint8_t *)m->random_store);
#endif
m->random_counter++;
}
uint32_t
sctp_select_initial_TSN(struct sctp_pcb *inp)
{
/*
* A true implementation should use random selection process to get
* the initial stream sequence number, using RFC1750 as a good
* guideline
*/
uint32_t x, *xp;
uint8_t *p;
int store_at, new_store;
if (inp->initial_sequence_debug != 0) {
uint32_t ret;
ret = inp->initial_sequence_debug;
inp->initial_sequence_debug++;
return (ret);
}
retry:
store_at = inp->store_at;
new_store = store_at + sizeof(uint32_t);
if (new_store >= (SCTP_SIGNATURE_SIZE-3)) {
new_store = 0;
}
if (!atomic_cmpset_int(&inp->store_at, store_at, new_store)) {
goto retry;
}
if (new_store == 0) {
/* Refill the random store */
sctp_fill_random_store(inp);
}
p = &inp->random_store[store_at];
xp = (uint32_t *)p;
x = *xp;
return (x);
}
uint32_t
sctp_select_a_tag(struct sctp_inpcb *inp, uint16_t lport, uint16_t rport, int check)
{
uint32_t x;
struct timeval now;
if (check) {
(void)SCTP_GETTIME_TIMEVAL(&now);
}
for (;;) {
x = sctp_select_initial_TSN(&inp->sctp_ep);
if (x == 0) {
/* we never use 0 */
continue;
}
if (!check || sctp_is_vtag_good(x, lport, rport, &now)) {
break;
}
}
return (x);
}
int32_t
sctp_map_assoc_state(int kernel_state)
{
int32_t user_state;
if (kernel_state & SCTP_STATE_WAS_ABORTED) {
user_state = SCTP_CLOSED;
} else if (kernel_state & SCTP_STATE_SHUTDOWN_PENDING) {
user_state = SCTP_SHUTDOWN_PENDING;
} else {
switch (kernel_state & SCTP_STATE_MASK) {
case SCTP_STATE_EMPTY:
user_state = SCTP_CLOSED;
break;
case SCTP_STATE_INUSE:
user_state = SCTP_CLOSED;
break;
case SCTP_STATE_COOKIE_WAIT:
user_state = SCTP_COOKIE_WAIT;
break;
case SCTP_STATE_COOKIE_ECHOED:
user_state = SCTP_COOKIE_ECHOED;
break;
case SCTP_STATE_OPEN:
user_state = SCTP_ESTABLISHED;
break;
case SCTP_STATE_SHUTDOWN_SENT:
user_state = SCTP_SHUTDOWN_SENT;
break;
case SCTP_STATE_SHUTDOWN_RECEIVED:
user_state = SCTP_SHUTDOWN_RECEIVED;
break;
case SCTP_STATE_SHUTDOWN_ACK_SENT:
user_state = SCTP_SHUTDOWN_ACK_SENT;
break;
default:
user_state = SCTP_CLOSED;
break;
}
}
return (user_state);
}
int
sctp_init_asoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
uint32_t override_tag, uint32_t vrf_id, uint16_t o_strms)
{
struct sctp_association *asoc;
/*
* Anything set to zero is taken care of by the allocation routine's
* bzero
*/
/*
* Up front select what scoping to apply on addresses I tell my peer
* Not sure what to do with these right now, we will need to come up
* with a way to set them. We may need to pass them through from the
* caller in the sctp_aloc_assoc() function.
*/
int i;
#if defined(SCTP_DETAILED_STR_STATS)
int j;
#endif
asoc = &stcb->asoc;
/* init all variables to a known value. */
SCTP_SET_STATE(stcb, SCTP_STATE_INUSE);
asoc->max_burst = inp->sctp_ep.max_burst;
asoc->fr_max_burst = inp->sctp_ep.fr_max_burst;
asoc->heart_beat_delay = sctp_ticks_to_msecs(inp->sctp_ep.sctp_timeoutticks[SCTP_TIMER_HEARTBEAT]);
asoc->cookie_life = inp->sctp_ep.def_cookie_life;
asoc->sctp_cmt_on_off = inp->sctp_cmt_on_off;
asoc->ecn_supported = inp->ecn_supported;
asoc->prsctp_supported = inp->prsctp_supported;
asoc->auth_supported = inp->auth_supported;
asoc->asconf_supported = inp->asconf_supported;
asoc->reconfig_supported = inp->reconfig_supported;
asoc->nrsack_supported = inp->nrsack_supported;
asoc->pktdrop_supported = inp->pktdrop_supported;
asoc->idata_supported = inp->idata_supported;
asoc->sctp_cmt_pf = (uint8_t)0;
asoc->sctp_frag_point = inp->sctp_frag_point;
asoc->sctp_features = inp->sctp_features;
asoc->default_dscp = inp->sctp_ep.default_dscp;
asoc->max_cwnd = inp->max_cwnd;
#ifdef INET6
if (inp->sctp_ep.default_flowlabel) {
asoc->default_flowlabel = inp->sctp_ep.default_flowlabel;
} else {
if (inp->ip_inp.inp.inp_flags & IN6P_AUTOFLOWLABEL) {
asoc->default_flowlabel = sctp_select_initial_TSN(&inp->sctp_ep);
asoc->default_flowlabel &= 0x000fffff;
asoc->default_flowlabel |= 0x80000000;
} else {
asoc->default_flowlabel = 0;
}
}
#endif
asoc->sb_send_resv = 0;
if (override_tag) {
asoc->my_vtag = override_tag;
} else {
asoc->my_vtag = sctp_select_a_tag(inp, stcb->sctp_ep->sctp_lport, stcb->rport, 1);
}
/* Get the nonce tags */
asoc->my_vtag_nonce = sctp_select_a_tag(inp, stcb->sctp_ep->sctp_lport, stcb->rport, 0);
asoc->peer_vtag_nonce = sctp_select_a_tag(inp, stcb->sctp_ep->sctp_lport, stcb->rport, 0);
asoc->vrf_id = vrf_id;
#ifdef SCTP_ASOCLOG_OF_TSNS
asoc->tsn_in_at = 0;
asoc->tsn_out_at = 0;
asoc->tsn_in_wrapped = 0;
asoc->tsn_out_wrapped = 0;
asoc->cumack_log_at = 0;
asoc->cumack_log_atsnt = 0;
#endif
#ifdef SCTP_FS_SPEC_LOG
asoc->fs_index = 0;
#endif
asoc->refcnt = 0;
asoc->assoc_up_sent = 0;
asoc->asconf_seq_out = asoc->str_reset_seq_out = asoc->init_seq_number = asoc->sending_seq =
sctp_select_initial_TSN(&inp->sctp_ep);
asoc->asconf_seq_out_acked = asoc->asconf_seq_out - 1;
/* we are optimisitic here */
asoc->peer_supports_nat = 0;
asoc->sent_queue_retran_cnt = 0;
/* for CMT */
asoc->last_net_cmt_send_started = NULL;
/* This will need to be adjusted */
asoc->last_acked_seq = asoc->init_seq_number - 1;
asoc->advanced_peer_ack_point = asoc->last_acked_seq;
asoc->asconf_seq_in = asoc->last_acked_seq;
/* here we are different, we hold the next one we expect */
asoc->str_reset_seq_in = asoc->last_acked_seq + 1;
asoc->initial_init_rto_max = inp->sctp_ep.initial_init_rto_max;
asoc->initial_rto = inp->sctp_ep.initial_rto;
asoc->default_mtu = inp->sctp_ep.default_mtu;
asoc->max_init_times = inp->sctp_ep.max_init_times;
asoc->max_send_times = inp->sctp_ep.max_send_times;
asoc->def_net_failure = inp->sctp_ep.def_net_failure;
asoc->def_net_pf_threshold = inp->sctp_ep.def_net_pf_threshold;
asoc->free_chunk_cnt = 0;
asoc->iam_blocking = 0;
asoc->context = inp->sctp_context;
asoc->local_strreset_support = inp->local_strreset_support;
asoc->def_send = inp->def_send;
asoc->delayed_ack = sctp_ticks_to_msecs(inp->sctp_ep.sctp_timeoutticks[SCTP_TIMER_RECV]);
asoc->sack_freq = inp->sctp_ep.sctp_sack_freq;
asoc->pr_sctp_cnt = 0;
asoc->total_output_queue_size = 0;
if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
asoc->scope.ipv6_addr_legal = 1;
if (SCTP_IPV6_V6ONLY(inp) == 0) {
asoc->scope.ipv4_addr_legal = 1;
} else {
asoc->scope.ipv4_addr_legal = 0;
}
#if defined(__Userspace__)
asoc->scope.conn_addr_legal = 0;
#endif
} else {
asoc->scope.ipv6_addr_legal = 0;
#if defined(__Userspace__)
if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_CONN) {
asoc->scope.conn_addr_legal = 1;
asoc->scope.ipv4_addr_legal = 0;
} else {
asoc->scope.conn_addr_legal = 0;
asoc->scope.ipv4_addr_legal = 1;
}
#else
asoc->scope.ipv4_addr_legal = 1;
#endif
}
asoc->my_rwnd = max(SCTP_SB_LIMIT_RCV(inp->sctp_socket), SCTP_MINIMAL_RWND);
asoc->peers_rwnd = SCTP_SB_LIMIT_RCV(inp->sctp_socket);
asoc->smallest_mtu = inp->sctp_frag_point;
asoc->minrto = inp->sctp_ep.sctp_minrto;
asoc->maxrto = inp->sctp_ep.sctp_maxrto;
asoc->stream_locked_on = 0;
asoc->ecn_echo_cnt_onq = 0;
asoc->stream_locked = 0;
asoc->send_sack = 1;
LIST_INIT(&asoc->sctp_restricted_addrs);
TAILQ_INIT(&asoc->nets);
TAILQ_INIT(&asoc->pending_reply_queue);
TAILQ_INIT(&asoc->asconf_ack_sent);
/* Setup to fill the hb random cache at first HB */
asoc->hb_random_idx = 4;
asoc->sctp_autoclose_ticks = inp->sctp_ep.auto_close_time;
stcb->asoc.congestion_control_module = inp->sctp_ep.sctp_default_cc_module;
stcb->asoc.cc_functions = sctp_cc_functions[inp->sctp_ep.sctp_default_cc_module];
stcb->asoc.stream_scheduling_module = inp->sctp_ep.sctp_default_ss_module;
stcb->asoc.ss_functions = sctp_ss_functions[inp->sctp_ep.sctp_default_ss_module];
/*
* Now the stream parameters, here we allocate space for all streams
* that we request by default.
*/
asoc->strm_realoutsize = asoc->streamoutcnt = asoc->pre_open_streams =
o_strms;
SCTP_MALLOC(asoc->strmout, struct sctp_stream_out *,
asoc->streamoutcnt * sizeof(struct sctp_stream_out),
SCTP_M_STRMO);
if (asoc->strmout == NULL) {
/* big trouble no memory */
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTPUTIL, ENOMEM);
return (ENOMEM);
}
for (i = 0; i < asoc->streamoutcnt; i++) {
/*
* inbound side must be set to 0xffff, also NOTE when we get
* the INIT-ACK back (for INIT sender) we MUST reduce the
* count (streamoutcnt) but first check if we sent to any of
* the upper streams that were dropped (if some were). Those
* that were dropped must be notified to the upper layer as
* failed to send.
*/
asoc->strmout[i].next_mid_ordered = 0;
asoc->strmout[i].next_mid_unordered = 0;
TAILQ_INIT(&asoc->strmout[i].outqueue);
asoc->strmout[i].chunks_on_queues = 0;
#if defined(SCTP_DETAILED_STR_STATS)
for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
asoc->strmout[i].abandoned_sent[j] = 0;
asoc->strmout[i].abandoned_unsent[j] = 0;
}
#else
asoc->strmout[i].abandoned_sent[0] = 0;
asoc->strmout[i].abandoned_unsent[0] = 0;
#endif
asoc->strmout[i].sid = i;
asoc->strmout[i].last_msg_incomplete = 0;
asoc->strmout[i].state = SCTP_STREAM_OPENING;
asoc->ss_functions.sctp_ss_init_stream(stcb, &asoc->strmout[i], NULL);
}
asoc->ss_functions.sctp_ss_init(stcb, asoc, 0);
/* Now the mapping array */
asoc->mapping_array_size = SCTP_INITIAL_MAPPING_ARRAY;
SCTP_MALLOC(asoc->mapping_array, uint8_t *, asoc->mapping_array_size,
SCTP_M_MAP);
if (asoc->mapping_array == NULL) {
SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTPUTIL, ENOMEM);
return (ENOMEM);
}
memset(asoc->mapping_array, 0, asoc->mapping_array_size);
SCTP_MALLOC(asoc->nr_mapping_array, uint8_t *, asoc->mapping_array_size,
SCTP_M_MAP);
if (asoc->nr_mapping_array == NULL) {
SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTPUTIL, ENOMEM);
return (ENOMEM);
}
memset(asoc->nr_mapping_array, 0, asoc->mapping_array_size);
/* Now the init of the other outqueues */
TAILQ_INIT(&asoc->free_chunks);
TAILQ_INIT(&asoc->control_send_queue);
TAILQ_INIT(&asoc->asconf_send_queue);
TAILQ_INIT(&asoc->send_queue);
TAILQ_INIT(&asoc->sent_queue);
TAILQ_INIT(&asoc->resetHead);
asoc->max_inbound_streams = inp->sctp_ep.max_open_streams_intome;
TAILQ_INIT(&asoc->asconf_queue);
/* authentication fields */
asoc->authinfo.random = NULL;
asoc->authinfo.active_keyid = 0;
asoc->authinfo.assoc_key = NULL;
asoc->authinfo.assoc_keyid = 0;
asoc->authinfo.recv_key = NULL;
asoc->authinfo.recv_keyid = 0;
LIST_INIT(&asoc->shared_keys);
asoc->marked_retrans = 0;
asoc->port = inp->sctp_ep.port;
asoc->timoinit = 0;
asoc->timodata = 0;
asoc->timosack = 0;
asoc->timoshutdown = 0;
asoc->timoheartbeat = 0;
asoc->timocookie = 0;
asoc->timoshutdownack = 0;
(void)SCTP_GETTIME_TIMEVAL(&asoc->start_time);
asoc->discontinuity_time = asoc->start_time;
for (i = 0; i < SCTP_PR_SCTP_MAX + 1; i++) {
asoc->abandoned_unsent[i] = 0;
asoc->abandoned_sent[i] = 0;
}
/* sa_ignore MEMLEAK {memory is put in the assoc mapping array and freed later when
* the association is freed.
*/
return (0);
}
void
sctp_print_mapping_array(struct sctp_association *asoc)
{
unsigned int i, limit;
SCTP_PRINTF("Mapping array size: %d, baseTSN: %8.8x, cumAck: %8.8x, highestTSN: (%8.8x, %8.8x).\n",
asoc->mapping_array_size,
asoc->mapping_array_base_tsn,
asoc->cumulative_tsn,
asoc->highest_tsn_inside_map,
asoc->highest_tsn_inside_nr_map);
for (limit = asoc->mapping_array_size; limit > 1; limit--) {
if (asoc->mapping_array[limit - 1] != 0) {
break;
}
}
SCTP_PRINTF("Renegable mapping array (last %d entries are zero):\n", asoc->mapping_array_size - limit);
for (i = 0; i < limit; i++) {
SCTP_PRINTF("%2.2x%c", asoc->mapping_array[i], ((i + 1) % 16) ? ' ' : '\n');
}
if (limit % 16)
SCTP_PRINTF("\n");
for (limit = asoc->mapping_array_size; limit > 1; limit--) {
if (asoc->nr_mapping_array[limit - 1]) {
break;
}
}
SCTP_PRINTF("Non renegable mapping array (last %d entries are zero):\n", asoc->mapping_array_size - limit);
for (i = 0; i < limit; i++) {
SCTP_PRINTF("%2.2x%c", asoc->nr_mapping_array[i], ((i + 1) % 16) ? ' ': '\n');
}
if (limit % 16)
SCTP_PRINTF("\n");
}
int
sctp_expand_mapping_array(struct sctp_association *asoc, uint32_t needed)
{
/* mapping array needs to grow */
uint8_t *new_array1, *new_array2;
uint32_t new_size;
new_size = asoc->mapping_array_size + ((needed+7)/8 + SCTP_MAPPING_ARRAY_INCR);
SCTP_MALLOC(new_array1, uint8_t *, new_size, SCTP_M_MAP);
SCTP_MALLOC(new_array2, uint8_t *, new_size, SCTP_M_MAP);
if ((new_array1 == NULL) || (new_array2 == NULL)) {
/* can't get more, forget it */
SCTP_PRINTF("No memory for expansion of SCTP mapping array %d\n", new_size);
if (new_array1) {
SCTP_FREE(new_array1, SCTP_M_MAP);
}
if (new_array2) {
SCTP_FREE(new_array2, SCTP_M_MAP);
}
return (-1);
}
memset(new_array1, 0, new_size);
memset(new_array2, 0, new_size);
memcpy(new_array1, asoc->mapping_array, asoc->mapping_array_size);
memcpy(new_array2, asoc->nr_mapping_array, asoc->mapping_array_size);
SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
asoc->mapping_array = new_array1;
asoc->nr_mapping_array = new_array2;
asoc->mapping_array_size = new_size;
return (0);
}
static void
sctp_iterator_work(struct sctp_iterator *it)
{
#if defined(__FreeBSD__) && !defined(__Userspace__)
struct epoch_tracker et;
#endif
struct sctp_inpcb *tinp;
int iteration_count = 0;
int inp_skip = 0;
int first_in = 1;
#if defined(__FreeBSD__) && !defined(__Userspace__)
NET_EPOCH_ENTER(et);
#endif
SCTP_INP_INFO_RLOCK();
SCTP_ITERATOR_LOCK();
sctp_it_ctl.cur_it = it;
if (it->inp) {
SCTP_INP_RLOCK(it->inp);
SCTP_INP_DECR_REF(it->inp);
}
if (it->inp == NULL) {
/* iterator is complete */
done_with_iterator:
sctp_it_ctl.cur_it = NULL;
SCTP_ITERATOR_UNLOCK();
SCTP_INP_INFO_RUNLOCK();
if (it->function_atend != NULL) {
(*it->function_atend) (it->pointer, it->val);
}
SCTP_FREE(it, SCTP_M_ITER);
#if defined(__FreeBSD__) && !defined(__Userspace__)
NET_EPOCH_EXIT(et);
#endif
return;
}
select_a_new_ep:
if (first_in) {
first_in = 0;
} else {
SCTP_INP_RLOCK(it->inp);
}
while (((it->pcb_flags) &&
((it->inp->sctp_flags & it->pcb_flags) != it->pcb_flags)) ||
((it->pcb_features) &&
((it->inp->sctp_features & it->pcb_features) != it->pcb_features))) {
/* endpoint flags or features don't match, so keep looking */
if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
SCTP_INP_RUNLOCK(it->inp);
goto done_with_iterator;
}
tinp = it->inp;
it->inp = LIST_NEXT(it->inp, sctp_list);
it->stcb = NULL;
SCTP_INP_RUNLOCK(tinp);
if (it->inp == NULL) {
goto done_with_iterator;
}
SCTP_INP_RLOCK(it->inp);
}
/* now go through each assoc which is in the desired state */
if (it->done_current_ep == 0) {
if (it->function_inp != NULL)
inp_skip = (*it->function_inp)(it->inp, it->pointer, it->val);
it->done_current_ep = 1;
}
if (it->stcb == NULL) {
/* run the per instance function */
it->stcb = LIST_FIRST(&it->inp->sctp_asoc_list);
}
if ((inp_skip) || it->stcb == NULL) {
if (it->function_inp_end != NULL) {
inp_skip = (*it->function_inp_end)(it->inp,
it->pointer,
it->val);
}
SCTP_INP_RUNLOCK(it->inp);
goto no_stcb;
}
while (it->stcb) {
SCTP_TCB_LOCK(it->stcb);
if (it->asoc_state && ((it->stcb->asoc.state & it->asoc_state) != it->asoc_state)) {
/* not in the right state... keep looking */
SCTP_TCB_UNLOCK(it->stcb);
goto next_assoc;
}
/* see if we have limited out the iterator loop */
iteration_count++;
if (iteration_count > SCTP_ITERATOR_MAX_AT_ONCE) {
/* Pause to let others grab the lock */
atomic_add_int(&it->stcb->asoc.refcnt, 1);
SCTP_TCB_UNLOCK(it->stcb);
SCTP_INP_INCR_REF(it->inp);
SCTP_INP_RUNLOCK(it->inp);
SCTP_ITERATOR_UNLOCK();
SCTP_INP_INFO_RUNLOCK();
SCTP_INP_INFO_RLOCK();
SCTP_ITERATOR_LOCK();
if (sctp_it_ctl.iterator_flags) {
/* We won't be staying here */
SCTP_INP_DECR_REF(it->inp);
atomic_add_int(&it->stcb->asoc.refcnt, -1);
#if !(defined(__FreeBSD__) && !defined(__Userspace__))
if (sctp_it_ctl.iterator_flags &
SCTP_ITERATOR_MUST_EXIT) {
goto done_with_iterator;
}
#endif
if (sctp_it_ctl.iterator_flags &
SCTP_ITERATOR_STOP_CUR_IT) {
sctp_it_ctl.iterator_flags &= ~SCTP_ITERATOR_STOP_CUR_IT;
goto done_with_iterator;
}
if (sctp_it_ctl.iterator_flags &
SCTP_ITERATOR_STOP_CUR_INP) {
sctp_it_ctl.iterator_flags &= ~SCTP_ITERATOR_STOP_CUR_INP;
goto no_stcb;
}
/* If we reach here huh? */
SCTP_PRINTF("Unknown it ctl flag %x\n",
sctp_it_ctl.iterator_flags);
sctp_it_ctl.iterator_flags = 0;
}
SCTP_INP_RLOCK(it->inp);
SCTP_INP_DECR_REF(it->inp);
SCTP_TCB_LOCK(it->stcb);
atomic_add_int(&it->stcb->asoc.refcnt, -1);
iteration_count = 0;
}
KASSERT(it->inp == it->stcb->sctp_ep,
("%s: stcb %p does not belong to inp %p, but inp %p",
__func__, it->stcb, it->inp, it->stcb->sctp_ep));
/* run function on this one */
(*it->function_assoc)(it->inp, it->stcb, it->pointer, it->val);
/*
* we lie here, it really needs to have its own type but
* first I must verify that this won't effect things :-0
*/
if (it->no_chunk_output == 0)
sctp_chunk_output(it->inp, it->stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED);
SCTP_TCB_UNLOCK(it->stcb);
next_assoc:
it->stcb = LIST_NEXT(it->stcb, sctp_tcblist);
if (it->stcb == NULL) {
/* Run last function */
if (it->function_inp_end != NULL) {
inp_skip = (*it->function_inp_end)(it->inp,
it->pointer,
it->val);
}
}
}
SCTP_INP_RUNLOCK(it->inp);
no_stcb:
/* done with all assocs on this endpoint, move on to next endpoint */
it->done_current_ep = 0;
if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
it->inp = NULL;
} else {
it->inp = LIST_NEXT(it->inp, sctp_list);
}
it->stcb = NULL;
if (it->inp == NULL) {
goto done_with_iterator;
}
goto select_a_new_ep;
}
void
sctp_iterator_worker(void)
{
struct sctp_iterator *it;
/* This function is called with the WQ lock in place */
sctp_it_ctl.iterator_running = 1;
while ((it = TAILQ_FIRST(&sctp_it_ctl.iteratorhead)) != NULL) {
/* now lets work on this one */
TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
SCTP_IPI_ITERATOR_WQ_UNLOCK();
#if defined(__FreeBSD__) && !defined(__Userspace__)
CURVNET_SET(it->vn);
#endif
sctp_iterator_work(it);
#if defined(__FreeBSD__) && !defined(__Userspace__)
CURVNET_RESTORE();
#endif
SCTP_IPI_ITERATOR_WQ_LOCK();
#if !defined(__FreeBSD__) && !defined(__Userspace__)
if (sctp_it_ctl.iterator_flags & SCTP_ITERATOR_MUST_EXIT) {
break;
}
#endif
/*sa_ignore FREED_MEMORY*/
}
sctp_it_ctl.iterator_running = 0;
return;
}
static void
sctp_handle_addr_wq(void)
{
/* deal with the ADDR wq from the rtsock calls */
struct sctp_laddr *wi, *nwi;
struct sctp_asconf_iterator *asc;
SCTP_MALLOC(asc, struct sctp_asconf_iterator *,
sizeof(struct sctp_asconf_iterator), SCTP_M_ASC_IT);
if (asc == NULL) {
/* Try later, no memory */
sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
(struct sctp_inpcb *)NULL,
(struct sctp_tcb *)NULL,
(struct sctp_nets *)NULL);
return;
}
LIST_INIT(&asc->list_of_work);
asc->cnt = 0;
LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
LIST_REMOVE(wi, sctp_nxt_addr);
LIST_INSERT_HEAD(&asc->list_of_work, wi, sctp_nxt_addr);
asc->cnt++;
}
if (asc->cnt == 0) {
SCTP_FREE(asc, SCTP_M_ASC_IT);
} else {
int ret;
ret = sctp_initiate_iterator(sctp_asconf_iterator_ep,
sctp_asconf_iterator_stcb,
NULL, /* No ep end for boundall */
SCTP_PCB_FLAGS_BOUNDALL,
SCTP_PCB_ANY_FEATURES,
SCTP_ASOC_ANY_STATE,
(void *)asc, 0,
sctp_asconf_iterator_end, NULL, 0);
if (ret) {
SCTP_PRINTF("Failed to initiate iterator for handle_addr_wq\n");
/* Freeing if we are stopping or put back on the addr_wq. */
if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
sctp_asconf_iterator_end(asc, 0);
} else {
LIST_FOREACH(wi, &asc->list_of_work, sctp_nxt_addr) {
LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
}
SCTP_FREE(asc, SCTP_M_ASC_IT);
}
}
}
}
/*-
* The following table shows which pointers for the inp, stcb, or net are
* stored for each timer after it was started.
*
*|Name |Timer |inp |stcb|net |
*|-----------------------------|-----------------------------|----|----|----|
*|SCTP_TIMER_TYPE_SEND |net->rxt_timer |Yes |Yes |Yes |
*|SCTP_TIMER_TYPE_INIT |net->rxt_timer |Yes |Yes |Yes |
*|SCTP_TIMER_TYPE_RECV |stcb->asoc.dack_timer |Yes |Yes |No |
*|SCTP_TIMER_TYPE_SHUTDOWN |net->rxt_timer |Yes |Yes |Yes |
*|SCTP_TIMER_TYPE_HEARTBEAT |net->hb_timer |Yes |Yes |Yes |
*|SCTP_TIMER_TYPE_COOKIE |net->rxt_timer |Yes |Yes |Yes |
*|SCTP_TIMER_TYPE_NEWCOOKIE |inp->sctp_ep.signature_change|Yes |No |No |
*|SCTP_TIMER_TYPE_PATHMTURAISE |net->pmtu_timer |Yes |Yes |Yes |
*|SCTP_TIMER_TYPE_SHUTDOWNACK |net->rxt_timer |Yes |Yes |Yes |
*|SCTP_TIMER_TYPE_ASCONF |stcb->asoc.asconf_timer |Yes |Yes |Yes |
*|SCTP_TIMER_TYPE_SHUTDOWNGUARD|stcb->asoc.shut_guard_timer |Yes |Yes |No |
*|SCTP_TIMER_TYPE_AUTOCLOSE |stcb->asoc.autoclose_timer |Yes |Yes |No |
*|SCTP_TIMER_TYPE_STRRESET |stcb->asoc.strreset_timer |Yes |Yes |No |
*|SCTP_TIMER_TYPE_INPKILL |inp->sctp_ep.signature_change|Yes |No |No |
*|SCTP_TIMER_TYPE_ASOCKILL |stcb->asoc.strreset_timer |Yes |Yes |No |
*|SCTP_TIMER_TYPE_ADDR_WQ |SCTP_BASE_INFO(addr_wq_timer)|No |No |No |
*|SCTP_TIMER_TYPE_PRIM_DELETED |stcb->asoc.delete_prim_timer |Yes |Yes |No |
*/
void
sctp_timeout_handler(void *t)
{
#if defined(__FreeBSD__) && !defined(__Userspace__)
struct epoch_tracker et;
#endif
struct timeval tv;
struct sctp_inpcb *inp;
struct sctp_tcb *stcb;
struct sctp_nets *net;
struct sctp_timer *tmr;
struct mbuf *op_err;
#if defined(__APPLE__) && !defined(__Userspace__)
struct socket *so;
#endif
#if defined(__Userspace__)
struct socket *upcall_socket = NULL;
#endif
int type;
int i, secret;
bool did_output, released_asoc_reference;
/*
* If inp, stcb or net are not NULL, then references to these were
* added when the timer was started, and must be released before this
* function returns.
*/
tmr = (struct sctp_timer *)t;
inp = (struct sctp_inpcb *)tmr->ep;
stcb = (struct sctp_tcb *)tmr->tcb;
net = (struct sctp_nets *)tmr->net;
#if defined(__FreeBSD__) && !defined(__Userspace__)
CURVNET_SET((struct vnet *)tmr->vnet);
#endif
did_output = 1;
released_asoc_reference = false;
#ifdef SCTP_AUDITING_ENABLED
sctp_audit_log(0xF0, (uint8_t) tmr->type);
sctp_auditing(3, inp, stcb, net);
#endif
/* sanity checks... */
KASSERT(tmr->self == NULL || tmr->self == tmr,
("sctp_timeout_handler: tmr->self corrupted"));
KASSERT(SCTP_IS_TIMER_TYPE_VALID(tmr->type),
("sctp_timeout_handler: invalid timer type %d", tmr->type));
type = tmr->type;
KASSERT(stcb == NULL || stcb->sctp_ep == inp,
("sctp_timeout_handler of type %d: inp = %p, stcb->sctp_ep %p",
type, stcb, stcb->sctp_ep));
tmr->stopped_from = 0xa001;
if ((stcb != NULL) && (stcb->asoc.state == SCTP_STATE_EMPTY)) {
SCTPDBG(SCTP_DEBUG_TIMER2,
"Timer type %d handler exiting due to CLOSED association.\n",
type);
goto out_decr;
}
tmr->stopped_from = 0xa002;
SCTPDBG(SCTP_DEBUG_TIMER2, "Timer type %d goes off.\n", type);
if (!SCTP_OS_TIMER_ACTIVE(&tmr->timer)) {
SCTPDBG(SCTP_DEBUG_TIMER2,
"Timer type %d handler exiting due to not being active.\n",
type);
goto out_decr;
}
tmr->stopped_from = 0xa003;
if (stcb) {
SCTP_TCB_LOCK(stcb);
/*
* Release reference so that association can be freed if
* necessary below.
* This is safe now that we have acquired the lock.
*/
atomic_add_int(&stcb->asoc.refcnt, -1);
released_asoc_reference = true;
if ((type != SCTP_TIMER_TYPE_ASOCKILL) &&
((stcb->asoc.state == SCTP_STATE_EMPTY) ||
(stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED))) {
SCTPDBG(SCTP_DEBUG_TIMER2,
"Timer type %d handler exiting due to CLOSED association.\n",
type);
goto out;
}
} else if (inp != NULL) {
SCTP_INP_WLOCK(inp);
} else {
SCTP_WQ_ADDR_LOCK();
}
/* Record in stopped_from which timeout occurred. */
tmr->stopped_from = type;
#if defined(__FreeBSD__) && !defined(__Userspace__)
NET_EPOCH_ENTER(et);
#endif
/* mark as being serviced now */
if (SCTP_OS_TIMER_PENDING(&tmr->timer)) {
/*
* Callout has been rescheduled.
*/
goto out;
}
if (!SCTP_OS_TIMER_ACTIVE(&tmr->timer)) {
/*
* Not active, so no action.
*/
goto out;
}
SCTP_OS_TIMER_DEACTIVATE(&tmr->timer);
#if defined(__Userspace__)
if ((stcb != NULL) &&
!(stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) &&
(stcb->sctp_socket != NULL)) {
upcall_socket = stcb->sctp_socket;
SOCK_LOCK(upcall_socket);
soref(upcall_socket);
SOCK_UNLOCK(upcall_socket);
}
#endif
/* call the handler for the appropriate timer type */
switch (type) {
case SCTP_TIMER_TYPE_SEND:
KASSERT(inp != NULL && stcb != NULL && net != NULL,
("timeout of type %d: inp = %p, stcb = %p, net = %p",
type, inp, stcb, net));
SCTP_STAT_INCR(sctps_timodata);
stcb->asoc.timodata++;
stcb->asoc.num_send_timers_up--;
if (stcb->asoc.num_send_timers_up < 0) {
stcb->asoc.num_send_timers_up = 0;
}
SCTP_TCB_LOCK_ASSERT(stcb);
if (sctp_t3rxt_timer(inp, stcb, net)) {
/* no need to unlock on tcb its gone */
goto out_decr;
}
SCTP_TCB_LOCK_ASSERT(stcb);
#ifdef SCTP_AUDITING_ENABLED
sctp_auditing(4, inp, stcb, net);
#endif
sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED);
did_output = true;
if ((stcb->asoc.num_send_timers_up == 0) &&
(stcb->asoc.sent_queue_cnt > 0)) {
struct sctp_tmit_chunk *chk;
/*
* Safeguard. If there on some on the sent queue
* somewhere but no timers running something is
* wrong... so we start a timer on the first chunk
* on the send queue on whatever net it is sent to.
*/
TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
if (chk->whoTo != NULL) {
break;
}
}
if (chk != NULL) {
sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, chk->whoTo);
}
}
break;
case SCTP_TIMER_TYPE_INIT:
KASSERT(inp != NULL && stcb != NULL && net != NULL,
("timeout of type %d: inp = %p, stcb = %p, net = %p",
type, inp, stcb, net));
SCTP_STAT_INCR(sctps_timoinit);
stcb->asoc.timoinit++;
if (sctp_t1init_timer(inp, stcb, net)) {
/* no need to unlock on tcb its gone */
goto out_decr;
}
did_output = false;
break;
case SCTP_TIMER_TYPE_RECV:
KASSERT(inp != NULL && stcb != NULL && net == NULL,
("timeout of type %d: inp = %p, stcb = %p, net = %p",
type, inp, stcb, net));
SCTP_STAT_INCR(sctps_timosack);
stcb->asoc.timosack++;
sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
#ifdef SCTP_AUDITING_ENABLED
sctp_auditing(4, inp, stcb, NULL);
#endif
sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_SACK_TMR, SCTP_SO_NOT_LOCKED);
did_output = true;
break;
case SCTP_TIMER_TYPE_SHUTDOWN:
KASSERT(inp != NULL && stcb != NULL && net != NULL,
("timeout of type %d: inp = %p, stcb = %p, net = %p",
type, inp, stcb, net));
SCTP_STAT_INCR(sctps_timoshutdown);
stcb->asoc.timoshutdown++;
if (sctp_shutdown_timer(inp, stcb, net)) {
/* no need to unlock on tcb its gone */
goto out_decr;
}
#ifdef SCTP_AUDITING_ENABLED
sctp_auditing(4, inp, stcb, net);
#endif
sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_NOT_LOCKED);
did_output = true;
break;
case SCTP_TIMER_TYPE_HEARTBEAT:
KASSERT(inp != NULL && stcb != NULL && net != NULL,
("timeout of type %d: inp = %p, stcb = %p, net = %p",
type, inp, stcb, net));
SCTP_STAT_INCR(sctps_timoheartbeat);
stcb->asoc.timoheartbeat++;
if (sctp_heartbeat_timer(inp, stcb, net)) {
/* no need to unlock on tcb its gone */
goto out_decr;
}
#ifdef SCTP_AUDITING_ENABLED
sctp_auditing(4, inp, stcb, net);
#endif
if (!(net->dest_state & SCTP_ADDR_NOHB)) {
sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net);
sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_HB_TMR, SCTP_SO_NOT_LOCKED);
did_output = true;
} else {
did_output = false;
}
break;
case SCTP_TIMER_TYPE_COOKIE:
KASSERT(inp != NULL && stcb != NULL && net != NULL,
("timeout of type %d: inp = %p, stcb = %p, net = %p",
type, inp, stcb, net));
SCTP_STAT_INCR(sctps_timocookie);
stcb->asoc.timocookie++;
if (sctp_cookie_timer(inp, stcb, net)) {
/* no need to unlock on tcb its gone */
goto out_decr;
}
#ifdef SCTP_AUDITING_ENABLED
sctp_auditing(4, inp, stcb, net);
#endif
/*
* We consider T3 and Cookie timer pretty much the same with
* respect to where from in chunk_output.
*/
sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED);
did_output = true;
break;
case SCTP_TIMER_TYPE_NEWCOOKIE:
KASSERT(inp != NULL && stcb == NULL && net == NULL,
("timeout of type %d: inp = %p, stcb = %p, net = %p",
type, inp, stcb, net));
SCTP_STAT_INCR(sctps_timosecret);
(void)SCTP_GETTIME_TIMEVAL(&tv);
inp->sctp_ep.time_of_secret_change = tv.tv_sec;
inp->sctp_ep.last_secret_number =
inp->sctp_ep.current_secret_number;
inp->sctp_ep.current_secret_number++;
if (inp->sctp_ep.current_secret_number >=
SCTP_HOW_MANY_SECRETS) {
inp->sctp_ep.current_secret_number = 0;
}
secret = (int)inp->sctp_ep.current_secret_number;
for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
inp->sctp_ep.secret_key[secret][i] =
sctp_select_initial_TSN(&inp->sctp_ep);
}
sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
did_output = false;
break;
case SCTP_TIMER_TYPE_PATHMTURAISE:
KASSERT(inp != NULL && stcb != NULL && net != NULL,
("timeout of type %d: inp = %p, stcb = %p, net = %p",
type, inp, stcb, net));
SCTP_STAT_INCR(sctps_timopathmtu);
sctp_pathmtu_timer(inp, stcb, net);
did_output = false;
break;
case SCTP_TIMER_TYPE_SHUTDOWNACK:
KASSERT(inp != NULL && stcb != NULL && net != NULL,
("timeout of type %d: inp = %p, stcb = %p, net = %p",
type, inp, stcb, net));
if (sctp_shutdownack_timer(inp, stcb, net)) {
/* no need to unlock on tcb its gone */
goto out_decr;
}
SCTP_STAT_INCR(sctps_timoshutdownack);
stcb->asoc.timoshutdownack++;
#ifdef SCTP_AUDITING_ENABLED
sctp_auditing(4, inp, stcb, net);
#endif
sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_SHUT_ACK_TMR, SCTP_SO_NOT_LOCKED);
did_output = true;
break;
case SCTP_TIMER_TYPE_ASCONF:
KASSERT(inp != NULL && stcb != NULL && net != NULL,
("timeout of type %d: inp = %p, stcb = %p, net = %p",
type, inp, stcb, net));
SCTP_STAT_INCR(sctps_timoasconf);
if (sctp_asconf_timer(inp, stcb, net)) {
/* no need to unlock on tcb its gone */
goto out_decr;
}
#ifdef SCTP_AUDITING_ENABLED
sctp_auditing(4, inp, stcb, net);
#endif
sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_ASCONF_TMR, SCTP_SO_NOT_LOCKED);
did_output = true;
break;
case SCTP_TIMER_TYPE_SHUTDOWNGUARD:
KASSERT(inp != NULL && stcb != NULL && net == NULL,
("timeout of type %d: inp = %p, stcb = %p, net = %p",
type, inp, stcb, net));
SCTP_STAT_INCR(sctps_timoshutdownguard);
op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
"Shutdown guard timer expired");
sctp_abort_an_association(inp, stcb, op_err, SCTP_SO_NOT_LOCKED);
did_output = true;
/* no need to unlock on tcb its gone */
goto out_decr;
case SCTP_TIMER_TYPE_AUTOCLOSE:
KASSERT(inp != NULL && stcb != NULL && net == NULL,
("timeout of type %d: inp = %p, stcb = %p, net = %p",
type, inp, stcb, net));
SCTP_STAT_INCR(sctps_timoautoclose);
sctp_autoclose_timer(inp, stcb);
sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_AUTOCLOSE_TMR, SCTP_SO_NOT_LOCKED);
did_output = true;
break;
case SCTP_TIMER_TYPE_STRRESET:
KASSERT(inp != NULL && stcb != NULL && net == NULL,
("timeout of type %d: inp = %p, stcb = %p, net = %p",
type, inp, stcb, net));
SCTP_STAT_INCR(sctps_timostrmrst);
if (sctp_strreset_timer(inp, stcb)) {
/* no need to unlock on tcb its gone */
goto out_decr;
}
sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_STRRST_TMR, SCTP_SO_NOT_LOCKED);
did_output = true;
break;
case SCTP_TIMER_TYPE_INPKILL:
KASSERT(inp != NULL && stcb == NULL && net == NULL,
("timeout of type %d: inp = %p, stcb = %p, net = %p",
type, inp, stcb, net));
SCTP_STAT_INCR(sctps_timoinpkill);
/*
* special case, take away our increment since WE are the
* killer
*/
sctp_timer_stop(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL,
SCTP_FROM_SCTPUTIL + SCTP_LOC_3);
#if defined(__APPLE__) && !defined(__Userspace__)
SCTP_SOCKET_LOCK(SCTP_INP_SO(inp), 1);
#endif
SCTP_INP_DECR_REF(inp);
SCTP_INP_WUNLOCK(inp);
sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT,
SCTP_CALLED_FROM_INPKILL_TIMER);
#if defined(__APPLE__) && !defined(__Userspace__)
SCTP_SOCKET_UNLOCK(SCTP_INP_SO(inp), 1);
#endif
inp = NULL;
goto out_no_decr;
case SCTP_TIMER_TYPE_ASOCKILL:
KASSERT(inp != NULL && stcb != NULL && net == NULL,
("timeout of type %d: inp = %p, stcb = %p, net = %p",
type, inp, stcb, net));
SCTP_STAT_INCR(sctps_timoassockill);
/* Can we free it yet? */
SCTP_INP_DECR_REF(inp);
sctp_timer_stop(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL,
SCTP_FROM_SCTPUTIL + SCTP_LOC_1);
#if defined(__APPLE__) && !defined(__Userspace__)
so = SCTP_INP_SO(inp);
atomic_add_int(&stcb->asoc.refcnt, 1);
SCTP_TCB_UNLOCK(stcb);
SCTP_SOCKET_LOCK(so, 1);
SCTP_TCB_LOCK(stcb);
atomic_subtract_int(&stcb->asoc.refcnt, 1);
#endif
(void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
SCTP_FROM_SCTPUTIL + SCTP_LOC_2);
#if defined(__APPLE__) && !defined(__Userspace__)
SCTP_SOCKET_UNLOCK(so, 1);
#endif
/*
* free asoc, always unlocks (or destroy's) so prevent
* duplicate unlock or unlock of a free mtx :-0
*/
stcb = NULL;
goto out_no_decr;
case SCTP_TIMER_TYPE_ADDR_WQ:
KASSERT(inp == NULL && stcb == NULL && net == NULL,
("timeout of type %d: inp = %p, stcb = %p, net = %p",
type, inp, stcb, net));
sctp_handle_addr_wq();
did_output = true;
break;
case SCTP_TIMER_TYPE_PRIM_DELETED:
KASSERT(inp != NULL && stcb != NULL && net == NULL,
("timeout of type %d: inp = %p, stcb = %p, net = %p",
type, inp, stcb, net));
SCTP_STAT_INCR(sctps_timodelprim);
sctp_delete_prim_timer(inp, stcb);
did_output = false;
break;
default:
#ifdef INVARIANTS
panic("Unknown timer type %d", type);
#else
did_output = false;
goto out;
#endif
}
#ifdef SCTP_AUDITING_ENABLED
sctp_audit_log(0xF1, (uint8_t) type);
if (inp != NULL)
sctp_auditing(5, inp, stcb, net);
#endif
if (did_output && (stcb != NULL) ) {
/*
* Now we need to clean up the control chunk chain if an
* ECNE is on it. It must be marked as UNSENT again so next
* call will continue to send it until such time that we get
* a CWR, to remove it. It is, however, less likely that we
* will find a ecn echo on the chain though.
*/
sctp_fix_ecn_echo(&stcb->asoc);
}
out:
if (stcb != NULL) {
SCTP_TCB_UNLOCK(stcb);
} else if (inp != NULL) {
SCTP_INP_WUNLOCK(inp);
} else {
SCTP_WQ_ADDR_UNLOCK();
}
out_decr:
#if defined(__Userspace__)
if (upcall_socket != NULL) {
if ((upcall_socket->so_upcall != NULL) &&
(upcall_socket->so_error != 0)) {
(*upcall_socket->so_upcall)(upcall_socket, upcall_socket->so_upcallarg, M_NOWAIT);
}
ACCEPT_LOCK();
SOCK_LOCK(upcall_socket);
sorele(upcall_socket);
}
#endif
/* These reference counts were incremented in sctp_timer_start(). */
if (inp != NULL) {
SCTP_INP_DECR_REF(inp);
}
if ((stcb != NULL) && !released_asoc_reference) {
atomic_add_int(&stcb->asoc.refcnt, -1);
}
if (net != NULL) {
sctp_free_remote_addr(net);
}
out_no_decr:
SCTPDBG(SCTP_DEBUG_TIMER2, "Timer type %d handler finished.\n", type);
#if defined(__FreeBSD__) && !defined(__Userspace__)
CURVNET_RESTORE();
NET_EPOCH_EXIT(et);
#endif
}
/*-
* The following table shows which parameters must be provided
* when calling sctp_timer_start(). For parameters not being
* provided, NULL must be used.
*
* |Name |inp |stcb|net |
* |-----------------------------|----|----|----|
* |SCTP_TIMER_TYPE_SEND |Yes |Yes |Yes |
* |SCTP_TIMER_TYPE_INIT |Yes |Yes |Yes |
* |SCTP_TIMER_TYPE_RECV |Yes |Yes |No |
* |SCTP_TIMER_TYPE_SHUTDOWN |Yes |Yes |Yes |
* |SCTP_TIMER_TYPE_HEARTBEAT |Yes |Yes |Yes |
* |SCTP_TIMER_TYPE_COOKIE |Yes |Yes |Yes |
* |SCTP_TIMER_TYPE_NEWCOOKIE |Yes |No |No |
* |SCTP_TIMER_TYPE_PATHMTURAISE |Yes |Yes |Yes |
* |SCTP_TIMER_TYPE_SHUTDOWNACK |Yes |Yes |Yes |
* |SCTP_TIMER_TYPE_ASCONF |Yes |Yes |Yes |
* |SCTP_TIMER_TYPE_SHUTDOWNGUARD|Yes |Yes |No |
* |SCTP_TIMER_TYPE_AUTOCLOSE |Yes |Yes |No |
* |SCTP_TIMER_TYPE_STRRESET |Yes |Yes |Yes |
* |SCTP_TIMER_TYPE_INPKILL |Yes |No |No |
* |SCTP_TIMER_TYPE_ASOCKILL |Yes |Yes |No |
* |SCTP_TIMER_TYPE_ADDR_WQ |No |No |No |
* |SCTP_TIMER_TYPE_PRIM_DELETED |Yes |Yes |No |
*
*/
void
sctp_timer_start(int t_type, struct sctp_inpcb *inp, struct sctp_tcb *stcb,
struct sctp_nets *net)
{
struct sctp_timer *tmr;
uint32_t to_ticks;
uint32_t rndval, jitter;
KASSERT(stcb == NULL || stcb->sctp_ep == inp,
("sctp_timer_start of type %d: inp = %p, stcb->sctp_ep %p",
t_type, stcb, stcb->sctp_ep));
tmr = NULL;
to_ticks = 0;
if (stcb != NULL) {
SCTP_TCB_LOCK_ASSERT(stcb);
} else if (inp != NULL) {
SCTP_INP_WLOCK_ASSERT(inp);
} else {
SCTP_WQ_ADDR_LOCK_ASSERT();
}
if (stcb != NULL) {
/* Don't restart timer on association that's about to be killed. */
if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
(t_type != SCTP_TIMER_TYPE_ASOCKILL)) {
SCTPDBG(SCTP_DEBUG_TIMER2,
"Timer type %d not started: inp=%p, stcb=%p, net=%p (stcb deleted).\n",
t_type, inp, stcb, net);
return;
}
/* Don't restart timer on net that's been removed. */
if (net != NULL && (net->dest_state & SCTP_ADDR_BEING_DELETED)) {
SCTPDBG(SCTP_DEBUG_TIMER2,
"Timer type %d not started: inp=%p, stcb=%p, net=%p (net deleted).\n",
t_type, inp, stcb, net);
return;
}
}
switch (t_type) {
case SCTP_TIMER_TYPE_SEND:
/* Here we use the RTO timer. */
if ((inp == NULL) || (stcb == NULL) || (net == NULL)) {
#ifdef INVARIANTS
panic("sctp_timer_start of type %d: inp = %p, stcb = %p, net = %p",
t_type, inp, stcb, net);
#else
return;
#endif
}
tmr = &net->rxt_timer;
if (net->RTO == 0) {
to_ticks = sctp_msecs_to_ticks(stcb->asoc.initial_rto);
} else {
to_ticks = sctp_msecs_to_ticks(net->RTO);
}
break;
case SCTP_TIMER_TYPE_INIT:
/*
* Here we use the INIT timer default usually about 1
* second.
*/
if ((inp == NULL) || (stcb == NULL) || (net == NULL)) {
#ifdef INVARIANTS
panic("sctp_timer_start of type %d: inp = %p, stcb = %p, net = %p",
t_type, inp, stcb, net);
#else
return;
#endif
}
tmr = &net->rxt_timer;
if (net->RTO == 0) {
to_ticks = sctp_msecs_to_ticks(stcb->asoc.initial_rto);
} else {
to_ticks = sctp_msecs_to_ticks(net->RTO);
}
break;
case SCTP_TIMER_TYPE_RECV:
/*
* Here we use the Delayed-Ack timer value from the inp,
* ususually about 200ms.
*/
if ((inp == NULL) || (stcb == NULL) || (net != NULL)) {
#ifdef INVARIANTS
panic("sctp_timer_start of type %d: inp = %p, stcb = %p, net = %p",
t_type, inp, stcb, net);
#else
return;
#endif
}
tmr = &stcb->asoc.dack_timer;
to_ticks = sctp_msecs_to_ticks(stcb->asoc.delayed_ack);
break;
case SCTP_TIMER_TYPE_SHUTDOWN:
/* Here we use the RTO of the destination. */
if ((inp == NULL) || (stcb == NULL) || (net == NULL)) {
#ifdef INVARIANTS
panic("sctp_timer_start of type %d: inp = %p, stcb = %p, net = %p",
t_type, inp, stcb, net);
#else
return;
#endif
}
tmr = &net->rxt_timer;
if (net->RTO == 0) {
to_ticks = sctp_msecs_to_ticks(stcb->asoc.initial_rto);
} else {
to_ticks = sctp_msecs_to_ticks(net->RTO);
}
break;
case SCTP_TIMER_TYPE_HEARTBEAT:
/*
* The net is used here so that we can add in the RTO. Even
* though we use a different timer. We also add the HB timer
* PLUS a random jitter.
*/
if ((inp == NULL) || (stcb == NULL) || (net == NULL)) {
#ifdef INVARIANTS
panic("sctp_timer_start of type %d: inp = %p, stcb = %p, net = %p",
t_type, inp, stcb, net);
#else
return;
#endif
}
if ((net->dest_state & SCTP_ADDR_NOHB) &&
!(net->dest_state & SCTP_ADDR_UNCONFIRMED)) {
SCTPDBG(SCTP_DEBUG_TIMER2,
"Timer type %d not started: inp=%p, stcb=%p, net=%p.\n",
t_type, inp, stcb, net);
return;
}
tmr = &net->hb_timer;
if (net->RTO == 0) {
to_ticks = stcb->asoc.initial_rto;
} else {
to_ticks = net->RTO;
}
rndval = sctp_select_initial_TSN(&inp->sctp_ep);
jitter = rndval % to_ticks;
if (jitter >= (to_ticks >> 1)) {
to_ticks = to_ticks + (jitter - (to_ticks >> 1));
} else {
to_ticks = to_ticks - jitter;
}
if (!(net->dest_state & SCTP_ADDR_UNCONFIRMED) &&
!(net->dest_state & SCTP_ADDR_PF)) {
to_ticks += net->heart_beat_delay;
}
/*
* Now we must convert the to_ticks that are now in
* ms to ticks.
*/
to_ticks = sctp_msecs_to_ticks(to_ticks);
break;
case SCTP_TIMER_TYPE_COOKIE:
/*
* Here we can use the RTO timer from the network since one
* RTT was complete. If a retransmission happened then we will
* be using the RTO initial value.
*/
if ((inp == NULL) || (stcb == NULL) || (net == NULL)) {
#ifdef INVARIANTS
panic("sctp_timer_start of type %d: inp = %p, stcb = %p, net = %p",
t_type, inp, stcb, net);
#else
return;
#endif
}
tmr = &net->rxt_timer;
if (net->RTO == 0) {
to_ticks = sctp_msecs_to_ticks(stcb->asoc.initial_rto);
} else {
to_ticks = sctp_msecs_to_ticks(net->RTO);
}
break;
case SCTP_TIMER_TYPE_NEWCOOKIE:
/*
* Nothing needed but the endpoint here ususually about 60
* minutes.
*/
if ((inp == NULL) || (stcb != NULL) || (net != NULL)) {
#ifdef INVARIANTS
panic("sctp_timer_start of type %d: inp = %p, stcb = %p, net = %p",
t_type, inp, stcb, net);
#else
return;
#endif
}
tmr = &inp->sctp_ep.signature_change;
to_ticks = inp->sctp_ep.sctp_timeoutticks[SCTP_TIMER_SIGNATURE];
break;
case SCTP_TIMER_TYPE_PATHMTURAISE:
/*
* Here we use the value found in the EP for PMTUD, ususually
* about 10 minutes.
*/
if ((inp == NULL) || (stcb == NULL) || (net == NULL)) {
#ifdef INVARIANTS
panic("sctp_timer_start of type %d: inp = %p, stcb = %p, net = %p",
t_type, inp, stcb, net);
#else
return;
#endif
}
if (net->dest_state & SCTP_ADDR_NO_PMTUD) {
SCTPDBG(SCTP_DEBUG_TIMER2,
"Timer type %d not started: inp=%p, stcb=%p, net=%p.\n",
t_type, inp, stcb, net);
return;
}
tmr = &net->pmtu_timer;
to_ticks = inp->sctp_ep.sctp_timeoutticks[SCTP_TIMER_PMTU];
break;
case SCTP_TIMER_TYPE_SHUTDOWNACK:
/* Here we use the RTO of the destination. */
if ((inp == NULL) || (stcb == NULL) || (net == NULL)) {
#ifdef INVARIANTS
panic("sctp_timer_start of type %d: inp = %p, stcb = %p, net = %p",
t_type, inp, stcb, net);
#else
return;
#endif
}
tmr = &net->rxt_timer;
if (net->RTO == 0) {
to_ticks = sctp_msecs_to_ticks(stcb->asoc.initial_rto);
} else {
to_ticks = sctp_msecs_to_ticks(net->RTO);
}
break;
case SCTP_TIMER_TYPE_ASCONF:
/*
* Here the timer comes from the stcb but its value is from
* the net's RTO.
*/
if ((inp == NULL) || (stcb == NULL) || (net == NULL)) {
#ifdef INVARIANTS
panic("sctp_timer_start of type %d: inp = %p, stcb = %p, net = %p",
t_type, inp, stcb, net);
#else
return;
#endif
}
tmr = &stcb->asoc.asconf_timer;
if (net->RTO == 0) {
to_ticks = sctp_msecs_to_ticks(stcb->asoc.initial_rto);
} else {
to_ticks = sctp_msecs_to_ticks(net->RTO);
}
break;
case SCTP_TIMER_TYPE_SHUTDOWNGUARD:
/*
* Here we use the endpoints shutdown guard timer usually
* about 3 minutes.
*/
if ((inp == NULL) || (stcb == NULL) || (net != NULL)) {
#ifdef INVARIANTS
panic("sctp_timer_start of type %d: inp = %p, stcb = %p, net = %p",
t_type, inp, stcb, net);
#else
return;
#endif
}
tmr = &stcb->asoc.shut_guard_timer;
if (inp->sctp_ep.sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] == 0) {
if (stcb->asoc.maxrto < UINT32_MAX / 5) {
to_ticks = sctp_msecs_to_ticks(5 * stcb->asoc.maxrto);
} else {
to_ticks = sctp_msecs_to_ticks(UINT32_MAX);
}
} else {
to_ticks = inp->sctp_ep.sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN];
}
break;
case SCTP_TIMER_TYPE_AUTOCLOSE:
if ((inp == NULL) || (stcb == NULL) || (net != NULL)) {
#ifdef INVARIANTS
panic("sctp_timer_start of type %d: inp = %p, stcb = %p, net = %p",
t_type, inp, stcb, net);
#else
return;
#endif
}
tmr = &stcb->asoc.autoclose_timer;
to_ticks = stcb->asoc.sctp_autoclose_ticks;
break;
case SCTP_TIMER_TYPE_STRRESET:
/*
* Here the timer comes from the stcb but its value is from
* the net's RTO.
*/
if ((inp == NULL) || (stcb == NULL) || (net == NULL)) {
#ifdef INVARIANTS
panic("sctp_timer_start of type %d: inp = %p, stcb = %p, net = %p",
t_type, inp, stcb, net);
#else
return;
#endif
}
tmr = &stcb->asoc.strreset_timer;
if (net->RTO == 0) {
to_ticks = sctp_msecs_to_ticks(stcb->asoc.initial_rto);
} else {
to_ticks = sctp_msecs_to_ticks(net->RTO);
}
break;
case SCTP_TIMER_TYPE_INPKILL:
/*
* The inp is setup to die. We re-use the signature_chage
* timer since that has stopped and we are in the GONE
* state.
*/
if ((inp == NULL) || (stcb != NULL) || (net != NULL)) {
#ifdef INVARIANTS
panic("sctp_timer_start of type %d: inp = %p, stcb = %p, net = %p",
t_type, inp, stcb, net);
#else
return;
#endif
}
tmr = &inp->sctp_ep.signature_change;
to_ticks = sctp_msecs_to_ticks(SCTP_INP_KILL_TIMEOUT);
break;
case SCTP_TIMER_TYPE_ASOCKILL:
if ((inp == NULL) || (stcb == NULL) || (net != NULL)) {
#ifdef INVARIANTS
panic("sctp_timer_start of type %d: inp = %p, stcb = %p, net = %p",
t_type, inp, stcb, net);
#else
return;
#endif
}
tmr = &stcb->asoc.strreset_timer;
to_ticks = sctp_msecs_to_ticks(SCTP_ASOC_KILL_TIMEOUT);
break;
case SCTP_TIMER_TYPE_ADDR_WQ:
if ((inp != NULL) || (stcb != NULL) || (net != NULL)) {
#ifdef INVARIANTS
panic("sctp_timer_start of type %d: inp = %p, stcb = %p, net = %p",
t_type, inp, stcb, net);
#else
return;
#endif
}
/* Only 1 tick away :-) */
tmr = &SCTP_BASE_INFO(addr_wq_timer);
to_ticks = SCTP_ADDRESS_TICK_DELAY;
break;
case SCTP_TIMER_TYPE_PRIM_DELETED:
if ((inp == NULL) || (stcb == NULL) || (net != NULL)) {
#ifdef INVARIANTS
panic("sctp_timer_start of type %d: inp = %p, stcb = %p, net = %p",
t_type, inp, stcb, net);
#else
return;
#endif
}
tmr = &stcb->asoc.delete_prim_timer;
to_ticks = sctp_msecs_to_ticks(stcb->asoc.initial_rto);
break;
default:
#ifdef INVARIANTS
panic("Unknown timer type %d", t_type);
#else
return;
#endif
}
KASSERT(tmr != NULL, ("tmr is NULL for timer type %d", t_type));
KASSERT(to_ticks > 0, ("to_ticks == 0 for timer type %d", t_type));
if (SCTP_OS_TIMER_PENDING(&tmr->timer)) {
/*
* We do NOT allow you to have it already running. If it is,
* we leave the current one up unchanged.
*/
SCTPDBG(SCTP_DEBUG_TIMER2,
"Timer type %d already running: inp=%p, stcb=%p, net=%p.\n",
t_type, inp, stcb, net);
return;
}
/* At this point we can proceed. */
if (t_type == SCTP_TIMER_TYPE_SEND) {
stcb->asoc.num_send_timers_up++;
}
tmr->stopped_from = 0;
tmr->type = t_type;
tmr->ep = (void *)inp;
tmr->tcb = (void *)stcb;
if (t_type == SCTP_TIMER_TYPE_STRRESET) {
tmr->net = NULL;
} else {
tmr->net = (void *)net;
}
tmr->self = (void *)tmr;
#if defined(__FreeBSD__) && !defined(__Userspace__)
tmr->vnet = (void *)curvnet;
#endif
tmr->ticks = sctp_get_tick_count();
if (SCTP_OS_TIMER_START(&tmr->timer, to_ticks, sctp_timeout_handler, tmr) == 0) {
SCTPDBG(SCTP_DEBUG_TIMER2,
"Timer type %d started: ticks=%u, inp=%p, stcb=%p, net=%p.\n",
t_type, to_ticks, inp, stcb, net);
/*
* If this is a newly scheduled callout, as opposed to a
* rescheduled one, increment relevant reference counts.
*/
if (tmr->ep != NULL) {
SCTP_INP_INCR_REF(inp);
}
if (tmr->tcb != NULL) {
atomic_add_int(&stcb->asoc.refcnt, 1);
}
if (tmr->net != NULL) {
atomic_add_int(&net->ref_count, 1);
}
} else {
/*
* This should not happen, since we checked for pending
* above.
*/
SCTPDBG(SCTP_DEBUG_TIMER2,
"Timer type %d restarted: ticks=%u, inp=%p, stcb=%p, net=%p.\n",
t_type, to_ticks, inp, stcb, net);
}
return;
}
/*-
* The following table shows which parameters must be provided
* when calling sctp_timer_stop(). For parameters not being
* provided, NULL must be used.
*
* |Name |inp |stcb|net |
* |-----------------------------|----|----|----|
* |SCTP_TIMER_TYPE_SEND |Yes |Yes |Yes |
* |SCTP_TIMER_TYPE_INIT |Yes |Yes |Yes |
* |SCTP_TIMER_TYPE_RECV |Yes |Yes |No |
* |SCTP_TIMER_TYPE_SHUTDOWN |Yes |Yes |Yes |
* |SCTP_TIMER_TYPE_HEARTBEAT |Yes |Yes |Yes |
* |SCTP_TIMER_TYPE_COOKIE |Yes |Yes |Yes |
* |SCTP_TIMER_TYPE_NEWCOOKIE |Yes |No |No |
* |SCTP_TIMER_TYPE_PATHMTURAISE |Yes |Yes |Yes |
* |SCTP_TIMER_TYPE_SHUTDOWNACK |Yes |Yes |Yes |
* |SCTP_TIMER_TYPE_ASCONF |Yes |Yes |No |
* |SCTP_TIMER_TYPE_SHUTDOWNGUARD|Yes |Yes |No |
* |SCTP_TIMER_TYPE_AUTOCLOSE |Yes |Yes |No |
* |SCTP_TIMER_TYPE_STRRESET |Yes |Yes |No |
* |SCTP_TIMER_TYPE_INPKILL |Yes |No |No |
* |SCTP_TIMER_TYPE_ASOCKILL |Yes |Yes |No |
* |SCTP_TIMER_TYPE_ADDR_WQ |No |No |No |
* |SCTP_TIMER_TYPE_PRIM_DELETED |Yes |Yes |No |
*
*/
void
sctp_timer_stop(int t_type, struct sctp_inpcb *inp, struct sctp_tcb *stcb,
struct sctp_nets *net, uint32_t from)
{
struct sctp_timer *tmr;
KASSERT(stcb == NULL || stcb->sctp_ep == inp,
("sctp_timer_stop of type %d: inp = %p, stcb->sctp_ep %p",
t_type, stcb, stcb->sctp_ep));
if (stcb != NULL) {
SCTP_TCB_LOCK_ASSERT(stcb);
} else if (inp != NULL) {
SCTP_INP_WLOCK_ASSERT(inp);
} else {
SCTP_WQ_ADDR_LOCK_ASSERT();
}
tmr = NULL;
switch (t_type) {
case SCTP_TIMER_TYPE_SEND:
if ((inp == NULL) || (stcb == NULL) || (net == NULL)) {
#ifdef INVARIANTS
panic("sctp_timer_stop of type %d: inp = %p, stcb = %p, net = %p",
t_type, inp, stcb, net);
#else
return;
#endif
}
tmr = &net->rxt_timer;
break;
case SCTP_TIMER_TYPE_INIT:
if ((inp == NULL) || (stcb == NULL) || (net == NULL)) {
#ifdef INVARIANTS
panic("sctp_timer_stop of type %d: inp = %p, stcb = %p, net = %p",
t_type, inp, stcb, net);
#else
return;
#endif
}
tmr = &net->rxt_timer;
break;
case SCTP_TIMER_TYPE_RECV:
if ((inp == NULL) || (stcb == NULL) || (net != NULL)) {
#ifdef INVARIANTS
panic("sctp_timer_stop of type %d: inp = %p, stcb = %p, net = %p",
t_type, inp, stcb, net);
#else
return;
#endif
}
tmr = &stcb->asoc.dack_timer;
break;
case SCTP_TIMER_TYPE_SHUTDOWN:
if ((inp == NULL) || (stcb == NULL) || (net == NULL)) {
#ifdef INVARIANTS
panic("sctp_timer_stop of type %d: inp = %p, stcb = %p, net = %p",
t_type, inp, stcb, net);
#else
return;
#endif
}
tmr = &net->rxt_timer;
break;
case SCTP_TIMER_TYPE_HEARTBEAT:
if ((inp == NULL) || (stcb == NULL) || (net == NULL)) {
#ifdef INVARIANTS
panic("sctp_timer_stop of type %d: inp = %p, stcb = %p, net = %p",
t_type, inp, stcb, net);
#else
return;
#endif
}
tmr = &net->hb_timer;
break;
case SCTP_TIMER_TYPE_COOKIE:
if ((inp == NULL) || (stcb == NULL) || (net == NULL)) {
#ifdef INVARIANTS
panic("sctp_timer_stop of type %d: inp = %p, stcb = %p, net = %p",
t_type, inp, stcb, net);
#else
return;
#endif
}
tmr = &net->rxt_timer;
break;
case SCTP_TIMER_TYPE_NEWCOOKIE:
if ((inp == NULL) || (stcb != NULL) || (net != NULL)) {
#ifdef INVARIANTS
panic("sctp_timer_stop of type %d: inp = %p, stcb = %p, net = %p",
t_type, inp, stcb, net);
#else
return;
#endif
}
tmr = &inp->sctp_ep.signature_change;
break;
case SCTP_TIMER_TYPE_PATHMTURAISE:
if ((inp == NULL) || (stcb == NULL) || (net == NULL)) {
#ifdef INVARIANTS
panic("sctp_timer_stop of type %d: inp = %p, stcb = %p, net = %p",
t_type, inp, stcb, net);
#else
return;
#endif
}
tmr = &net->pmtu_timer;
break;
case SCTP_TIMER_TYPE_SHUTDOWNACK:
if ((inp == NULL) || (stcb == NULL) || (net == NULL)) {
#ifdef INVARIANTS
panic("sctp_timer_stop of type %d: inp = %p, stcb = %p, net = %p",
t_type, inp, stcb, net);
#else
return;
#endif
}
tmr = &net->rxt_timer;
break;
case SCTP_TIMER_TYPE_ASCONF:
if ((inp == NULL) || (stcb == NULL) || (net != NULL)) {
#ifdef INVARIANTS
panic("sctp_timer_stop of type %d: inp = %p, stcb = %p, net = %p",
t_type, inp, stcb, net);
#else
return;
#endif
}
tmr = &stcb->asoc.asconf_timer;
break;
case SCTP_TIMER_TYPE_SHUTDOWNGUARD:
if ((inp == NULL) || (stcb == NULL) || (net != NULL)) {
#ifdef INVARIANTS
panic("sctp_timer_stop of type %d: inp = %p, stcb = %p, net = %p",
t_type, inp, stcb, net);
#else
return;
#endif
}
tmr = &stcb->asoc.shut_guard_timer;
break;
case SCTP_TIMER_TYPE_AUTOCLOSE:
if ((inp == NULL) || (stcb == NULL) || (net != NULL)) {
#ifdef INVARIANTS
panic("sctp_timer_stop of type %d: inp = %p, stcb = %p, net = %p",
t_type, inp, stcb, net);
#else
return;
#endif
}
tmr = &stcb->asoc.autoclose_timer;
break;
case SCTP_TIMER_TYPE_STRRESET:
if ((inp == NULL) || (stcb == NULL) || (net != NULL)) {
#ifdef INVARIANTS
panic("sctp_timer_stop of type %d: inp = %p, stcb = %p, net = %p",
t_type, inp, stcb, net);
#else
return;
#endif
}
tmr = &stcb->asoc.strreset_timer;
break;
case SCTP_TIMER_TYPE_INPKILL:
/*
* The inp is setup to die. We re-use the signature_chage
* timer since that has stopped and we are in the GONE
* state.
*/
if ((inp == NULL) || (stcb != NULL) || (net != NULL)) {
#ifdef INVARIANTS
panic("sctp_timer_stop of type %d: inp = %p, stcb = %p, net = %p",
t_type, inp, stcb, net);
#else
return;
#endif
}
tmr = &inp->sctp_ep.signature_change;
break;
case SCTP_TIMER_TYPE_ASOCKILL:
if ((inp == NULL) || (stcb == NULL) || (net != NULL)) {
#ifdef INVARIANTS
panic("sctp_timer_stop of type %d: inp = %p, stcb = %p, net = %p",
t_type, inp, stcb, net);
#else
return;
#endif
}
tmr = &stcb->asoc.strreset_timer;
break;
case SCTP_TIMER_TYPE_ADDR_WQ:
if ((inp != NULL) || (stcb != NULL) || (net != NULL)) {
#ifdef INVARIANTS
panic("sctp_timer_stop of type %d: inp = %p, stcb = %p, net = %p",
t_type, inp, stcb, net);
#else
return;
#endif
}
tmr = &SCTP_BASE_INFO(addr_wq_timer);
break;
case SCTP_TIMER_TYPE_PRIM_DELETED:
if ((inp == NULL) || (stcb == NULL) || (net != NULL)) {
#ifdef INVARIANTS
panic("sctp_timer_stop of type %d: inp = %p, stcb = %p, net = %p",
t_type, inp, stcb, net);
#else
return;
#endif
}
tmr = &stcb->asoc.delete_prim_timer;
break;
default:
#ifdef INVARIANTS
panic("Unknown timer type %d", t_type);
#else
return;
#endif
}
KASSERT(tmr != NULL, ("tmr is NULL for timer type %d", t_type));
if ((tmr->type != SCTP_TIMER_TYPE_NONE) &&
(tmr->type != t_type)) {
/*
* Ok we have a timer that is under joint use. Cookie timer
* per chance with the SEND timer. We therefore are NOT
* running the timer that the caller wants stopped. So just
* return.
*/
SCTPDBG(SCTP_DEBUG_TIMER2,
"Shared timer type %d not running: inp=%p, stcb=%p, net=%p.\n",
t_type, inp, stcb, net);
return;
}
if ((t_type == SCTP_TIMER_TYPE_SEND) && (stcb != NULL)) {
stcb->asoc.num_send_timers_up--;
if (stcb->asoc.num_send_timers_up < 0) {
stcb->asoc.num_send_timers_up = 0;
}
}
tmr->self = NULL;
tmr->stopped_from = from;
if (SCTP_OS_TIMER_STOP(&tmr->timer) == 1) {
KASSERT(tmr->ep == inp,
("sctp_timer_stop of type %d: inp = %p, tmr->inp = %p",
t_type, inp, tmr->ep));
KASSERT(tmr->tcb == stcb,
("sctp_timer_stop of type %d: stcb = %p, tmr->stcb = %p",
t_type, stcb, tmr->tcb));
KASSERT(((t_type == SCTP_TIMER_TYPE_ASCONF) && (tmr->net != NULL)) ||
((t_type != SCTP_TIMER_TYPE_ASCONF) && (tmr->net == net)),
("sctp_timer_stop of type %d: net = %p, tmr->net = %p",
t_type, net, tmr->net));
SCTPDBG(SCTP_DEBUG_TIMER2,
"Timer type %d stopped: inp=%p, stcb=%p, net=%p.\n",
t_type, inp, stcb, net);
/*
* If the timer was actually stopped, decrement reference counts
* that were incremented in sctp_timer_start().
*/
if (tmr->ep != NULL) {
SCTP_INP_DECR_REF(inp);
tmr->ep = NULL;
}
if (tmr->tcb != NULL) {
atomic_add_int(&stcb->asoc.refcnt, -1);
tmr->tcb = NULL;
}
if (tmr->net != NULL) {
/*
* Can't use net, since it doesn't work for
* SCTP_TIMER_TYPE_ASCONF.
*/
sctp_free_remote_addr((struct sctp_nets *)tmr->net);
tmr->net = NULL;
}
} else {
SCTPDBG(SCTP_DEBUG_TIMER2,
"Timer type %d not stopped: inp=%p, stcb=%p, net=%p.\n",
t_type, inp, stcb, net);
}
return;
}
uint32_t
sctp_calculate_len(struct mbuf *m)
{
uint32_t tlen = 0;
struct mbuf *at;
at = m;
while (at) {
tlen += SCTP_BUF_LEN(at);
at = SCTP_BUF_NEXT(at);
}
return (tlen);
}
void
sctp_mtu_size_reset(struct sctp_inpcb *inp,
struct sctp_association *asoc, uint32_t mtu)
{
/*
* Reset the P-MTU size on this association, this involves changing
* the asoc MTU, going through ANY chunk+overhead larger than mtu to
* allow the DF flag to be cleared.
*/
struct sctp_tmit_chunk *chk;
unsigned int eff_mtu, ovh;
asoc->smallest_mtu = mtu;
if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
ovh = SCTP_MIN_OVERHEAD;
} else {
ovh = SCTP_MIN_V4_OVERHEAD;
}
eff_mtu = mtu - ovh;
TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
if (chk->send_size > eff_mtu) {
chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
}
}
TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
if (chk->send_size > eff_mtu) {
chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
}
}
}
/*
* Given an association and starting time of the current RTT period, update
* RTO in number of msecs. net should point to the current network.
* Return 1, if an RTO update was performed, return 0 if no update was
* performed due to invalid starting point.
*/
int
sctp_calculate_rto(struct sctp_tcb *stcb,
struct sctp_association *asoc,
struct sctp_nets *net,
struct timeval *old,
int rtt_from_sack)
{
struct timeval now;
uint64_t rtt_us; /* RTT in us */
int32_t rtt; /* RTT in ms */
uint32_t new_rto;
int first_measure = 0;
/************************/
/* 1. calculate new RTT */
/************************/
/* get the current time */
if (stcb->asoc.use_precise_time) {
(void)SCTP_GETPTIME_TIMEVAL(&now);
} else {
(void)SCTP_GETTIME_TIMEVAL(&now);
}
if ((old->tv_sec > now.tv_sec) ||
((old->tv_sec == now.tv_sec) && (old->tv_usec > now.tv_usec))) {
/* The starting point is in the future. */
return (0);
}
timevalsub(&now, old);
rtt_us = (uint64_t)1000000 * (uint64_t)now.tv_sec + (uint64_t)now.tv_usec;
if (rtt_us > SCTP_RTO_UPPER_BOUND * 1000) {
/* The RTT is larger than a sane value. */
return (0);
}
/* store the current RTT in us */
net->rtt = rtt_us;
/* compute rtt in ms */
rtt = (int32_t)(net->rtt / 1000);
if ((asoc->cc_functions.sctp_rtt_calculated) && (rtt_from_sack == SCTP_RTT_FROM_DATA)) {
/* Tell the CC module that a new update has just occurred from a sack */
(*asoc->cc_functions.sctp_rtt_calculated)(stcb, net, &now);
}
/* Do we need to determine the lan? We do this only
* on sacks i.e. RTT being determined from data not
* non-data (HB/INIT->INITACK).
*/
if ((rtt_from_sack == SCTP_RTT_FROM_DATA) &&
(net->lan_type == SCTP_LAN_UNKNOWN)) {
if (net->rtt > SCTP_LOCAL_LAN_RTT) {
net->lan_type = SCTP_LAN_INTERNET;
} else {
net->lan_type = SCTP_LAN_LOCAL;
}
}
/***************************/
/* 2. update RTTVAR & SRTT */
/***************************/
/*-
* Compute the scaled average lastsa and the
* scaled variance lastsv as described in van Jacobson
* Paper "Congestion Avoidance and Control", Annex A.
*
* (net->lastsa >> SCTP_RTT_SHIFT) is the srtt
* (net->lastsv >> SCTP_RTT_VAR_SHIFT) is the rttvar
*/
if (net->RTO_measured) {
rtt -= (net->lastsa >> SCTP_RTT_SHIFT);
net->lastsa += rtt;
if (rtt < 0) {
rtt = -rtt;
}
rtt -= (net->lastsv >> SCTP_RTT_VAR_SHIFT);
net->lastsv += rtt;
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_RTTVAR_LOGGING_ENABLE) {
rto_logging(net, SCTP_LOG_RTTVAR);
}
} else {
/* First RTO measurment */
net->RTO_measured = 1;
first_measure = 1;
net->lastsa = rtt << SCTP_RTT_SHIFT;
net->lastsv = (rtt / 2) << SCTP_RTT_VAR_SHIFT;
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_RTTVAR_LOGGING_ENABLE) {
rto_logging(net, SCTP_LOG_INITIAL_RTT);
}
}
if (net->lastsv == 0) {
net->lastsv = SCTP_CLOCK_GRANULARITY;
}
new_rto = (net->lastsa >> SCTP_RTT_SHIFT) + net->lastsv;
if ((new_rto > SCTP_SAT_NETWORK_MIN) &&
(stcb->asoc.sat_network_lockout == 0)) {
stcb->asoc.sat_network = 1;
} else if ((!first_measure) && stcb->asoc.sat_network) {
stcb->asoc.sat_network = 0;
stcb->asoc.sat_network_lockout = 1;
}
/* bound it, per C6/C7 in Section 5.3.1 */
if (new_rto < stcb->asoc.minrto) {
new_rto = stcb->asoc.minrto;
}
if (new_rto > stcb->asoc.maxrto) {
new_rto = stcb->asoc.maxrto;
}
net->RTO = new_rto;
return (1);
}
/*
* return a pointer to a contiguous piece of data from the given mbuf chain
* starting at 'off' for 'len' bytes. If the desired piece spans more than
* one mbuf, a copy is made at 'ptr'. caller must ensure that the buffer size
* is >= 'len' returns NULL if there there isn't 'len' bytes in the chain.
*/
caddr_t
sctp_m_getptr(struct mbuf *m, int off, int len, uint8_t * in_ptr)
{
uint32_t count;
uint8_t *ptr;
ptr = in_ptr;
if ((off < 0) || (len <= 0))
return (NULL);
/* find the desired start location */
while ((m != NULL) && (off > 0)) {
if (off < SCTP_BUF_LEN(m))
break;
off -= SCTP_BUF_LEN(m);
m = SCTP_BUF_NEXT(m);
}
if (m == NULL)
return (NULL);
/* is the current mbuf large enough (eg. contiguous)? */
if ((SCTP_BUF_LEN(m) - off) >= len) {
return (mtod(m, caddr_t) + off);
} else {
/* else, it spans more than one mbuf, so save a temp copy... */
while ((m != NULL) && (len > 0)) {
count = min(SCTP_BUF_LEN(m) - off, len);
memcpy(ptr, mtod(m, caddr_t) + off, count);
len -= count;
ptr += count;
off = 0;
m = SCTP_BUF_NEXT(m);
}
if ((m == NULL) && (len > 0))
return (NULL);
else
return ((caddr_t)in_ptr);
}
}
struct sctp_paramhdr *
sctp_get_next_param(struct mbuf *m,
int offset,
struct sctp_paramhdr *pull,
int pull_limit)
{
/* This just provides a typed signature to Peter's Pull routine */
return ((struct sctp_paramhdr *)sctp_m_getptr(m, offset, pull_limit,
(uint8_t *) pull));
}
struct mbuf *
sctp_add_pad_tombuf(struct mbuf *m, int padlen)
{
struct mbuf *m_last;
caddr_t dp;
if (padlen > 3) {
return (NULL);
}
if (padlen <= M_TRAILINGSPACE(m)) {
/*
* The easy way. We hope the majority of the time we hit
* here :)
*/
m_last = m;
} else {
/* Hard way we must grow the mbuf chain */
m_last = sctp_get_mbuf_for_msg(padlen, 0, M_NOWAIT, 1, MT_DATA);
if (m_last == NULL) {
return (NULL);
}
SCTP_BUF_LEN(m_last) = 0;
SCTP_BUF_NEXT(m_last) = NULL;
SCTP_BUF_NEXT(m) = m_last;
}
dp = mtod(m_last, caddr_t) + SCTP_BUF_LEN(m_last);
SCTP_BUF_LEN(m_last) += padlen;
memset(dp, 0, padlen);
return (m_last);
}
struct mbuf *
sctp_pad_lastmbuf(struct mbuf *m, int padval, struct mbuf *last_mbuf)
{
/* find the last mbuf in chain and pad it */
struct mbuf *m_at;
if (last_mbuf != NULL) {
return (sctp_add_pad_tombuf(last_mbuf, padval));
} else {
for (m_at = m; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
if (SCTP_BUF_NEXT(m_at) == NULL) {
return (sctp_add_pad_tombuf(m_at, padval));
}
}
}
return (NULL);
}
static void
sctp_notify_assoc_change(uint16_t state, struct sctp_tcb *stcb,
uint16_t error, struct sctp_abort_chunk *abort, uint8_t from_peer, int so_locked)
{
struct mbuf *m_notify;
struct sctp_assoc_change *sac;
struct sctp_queued_to_read *control;
unsigned int notif_len;
uint16_t abort_len;
unsigned int i;
#if defined(__APPLE__) && !defined(__Userspace__)
struct socket *so;
#endif
if (stcb == NULL) {
return;
}
if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVASSOCEVNT)) {
notif_len = (unsigned int)sizeof(struct sctp_assoc_change);
if (abort != NULL) {
abort_len = ntohs(abort->ch.chunk_length);
/*
* Only SCTP_CHUNK_BUFFER_SIZE are guaranteed to be
* contiguous.
*/
if (abort_len > SCTP_CHUNK_BUFFER_SIZE) {
abort_len = SCTP_CHUNK_BUFFER_SIZE;
}
} else {
abort_len = 0;
}
if ((state == SCTP_COMM_UP) || (state == SCTP_RESTART)) {
notif_len += SCTP_ASSOC_SUPPORTS_MAX;
} else if ((state == SCTP_COMM_LOST) || (state == SCTP_CANT_STR_ASSOC)) {
notif_len += abort_len;
}
m_notify = sctp_get_mbuf_for_msg(notif_len, 0, M_NOWAIT, 1, MT_DATA);
if (m_notify == NULL) {
/* Retry with smaller value. */
notif_len = (unsigned int)sizeof(struct sctp_assoc_change);
m_notify = sctp_get_mbuf_for_msg(notif_len, 0, M_NOWAIT, 1, MT_DATA);
if (m_notify == NULL) {
goto set_error;
}
}
SCTP_BUF_NEXT(m_notify) = NULL;
sac = mtod(m_notify, struct sctp_assoc_change *);
memset(sac, 0, notif_len);
sac->sac_type = SCTP_ASSOC_CHANGE;
sac->sac_flags = 0;
sac->sac_length = sizeof(struct sctp_assoc_change);
sac->sac_state = state;
sac->sac_error = error;
/* XXX verify these stream counts */
sac->sac_outbound_streams = stcb->asoc.streamoutcnt;
sac->sac_inbound_streams = stcb->asoc.streamincnt;
sac->sac_assoc_id = sctp_get_associd(stcb);
if (notif_len > sizeof(struct sctp_assoc_change)) {
if ((state == SCTP_COMM_UP) || (state == SCTP_RESTART)) {
i = 0;
if (stcb->asoc.prsctp_supported == 1) {
sac->sac_info[i++] = SCTP_ASSOC_SUPPORTS_PR;
}
if (stcb->asoc.auth_supported == 1) {
sac->sac_info[i++] = SCTP_ASSOC_SUPPORTS_AUTH;
}
if (stcb->asoc.asconf_supported == 1) {
sac->sac_info[i++] = SCTP_ASSOC_SUPPORTS_ASCONF;
}
if (stcb->asoc.idata_supported == 1) {
sac->sac_info[i++] = SCTP_ASSOC_SUPPORTS_INTERLEAVING;
}
sac->sac_info[i++] = SCTP_ASSOC_SUPPORTS_MULTIBUF;
if (stcb->asoc.reconfig_supported == 1) {
sac->sac_info[i++] = SCTP_ASSOC_SUPPORTS_RE_CONFIG;
}
sac->sac_length += i;
} else if ((state == SCTP_COMM_LOST) || (state == SCTP_CANT_STR_ASSOC)) {
memcpy(sac->sac_info, abort, abort_len);
sac->sac_length += abort_len;
}
}
SCTP_BUF_LEN(m_notify) = sac->sac_length;
control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination,
0, 0, stcb->asoc.context, 0, 0, 0,
m_notify);
if (control != NULL) {
control->length = SCTP_BUF_LEN(m_notify);
control->spec_flags = M_NOTIFICATION;
/* not that we need this */
control->tail_mbuf = m_notify;
sctp_add_to_readq(stcb->sctp_ep, stcb,
control,
&stcb->sctp_socket->so_rcv, 1, SCTP_READ_LOCK_NOT_HELD,
so_locked);
} else {
sctp_m_freem(m_notify);
}
}
/*
* For 1-to-1 style sockets, we send up and error when an ABORT
* comes in.
*/
set_error:
if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
(stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
((state == SCTP_COMM_LOST) || (state == SCTP_CANT_STR_ASSOC))) {
SOCK_LOCK(stcb->sctp_socket);
if (from_peer) {
if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) {
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTPUTIL, ECONNREFUSED);
stcb->sctp_socket->so_error = ECONNREFUSED;
} else {
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTPUTIL, ECONNRESET);
stcb->sctp_socket->so_error = ECONNRESET;
}
} else {
if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
(SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTPUTIL, ETIMEDOUT);
stcb->sctp_socket->so_error = ETIMEDOUT;
} else {
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTPUTIL, ECONNABORTED);
stcb->sctp_socket->so_error = ECONNABORTED;
}
}
SOCK_UNLOCK(stcb->sctp_socket);
}
/* Wake ANY sleepers */
#if defined(__APPLE__) && !defined(__Userspace__)
so = SCTP_INP_SO(stcb->sctp_ep);
if (!so_locked) {
atomic_add_int(&stcb->asoc.refcnt, 1);
SCTP_TCB_UNLOCK(stcb);
SCTP_SOCKET_LOCK(so, 1);
SCTP_TCB_LOCK(stcb);
atomic_subtract_int(&stcb->asoc.refcnt, 1);
if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
SCTP_SOCKET_UNLOCK(so, 1);
return;
}
}
#endif
if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
(stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
((state == SCTP_COMM_LOST) || (state == SCTP_CANT_STR_ASSOC))) {
socantrcvmore(stcb->sctp_socket);
}
sorwakeup(stcb->sctp_socket);
sowwakeup(stcb->sctp_socket);
#if defined(__APPLE__) && !defined(__Userspace__)
if (!so_locked) {
SCTP_SOCKET_UNLOCK(so, 1);
}
#endif
}
static void
sctp_notify_peer_addr_change(struct sctp_tcb *stcb, uint32_t state,
struct sockaddr *sa, uint32_t error, int so_locked)
{
struct mbuf *m_notify;
struct sctp_paddr_change *spc;
struct sctp_queued_to_read *control;
if ((stcb == NULL) ||
sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVPADDREVNT)) {
/* event not enabled */
return;
}
m_notify = sctp_get_mbuf_for_msg(sizeof(struct sctp_paddr_change), 0, M_NOWAIT, 1, MT_DATA);
if (m_notify == NULL)
return;
SCTP_BUF_LEN(m_notify) = 0;
spc = mtod(m_notify, struct sctp_paddr_change *);
memset(spc, 0, sizeof(struct sctp_paddr_change));
spc->spc_type = SCTP_PEER_ADDR_CHANGE;
spc->spc_flags = 0;
spc->spc_length = sizeof(struct sctp_paddr_change);
switch (sa->sa_family) {
#ifdef INET
case AF_INET:
#ifdef INET6
if (sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_NEEDS_MAPPED_V4)) {
in6_sin_2_v4mapsin6((struct sockaddr_in *)sa,
(struct sockaddr_in6 *)&spc->spc_aaddr);
} else {
memcpy(&spc->spc_aaddr, sa, sizeof(struct sockaddr_in));
}
#else
memcpy(&spc->spc_aaddr, sa, sizeof(struct sockaddr_in));
#endif
break;
#endif
#ifdef INET6
case AF_INET6:
{
#ifdef SCTP_EMBEDDED_V6_SCOPE
struct sockaddr_in6 *sin6;
#endif /* SCTP_EMBEDDED_V6_SCOPE */
memcpy(&spc->spc_aaddr, sa, sizeof(struct sockaddr_in6));
#ifdef SCTP_EMBEDDED_V6_SCOPE
sin6 = (struct sockaddr_in6 *)&spc->spc_aaddr;
if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) {
if (sin6->sin6_scope_id == 0) {
/* recover scope_id for user */
#ifdef SCTP_KAME
(void)sa6_recoverscope(sin6);
#else
(void)in6_recoverscope(sin6, &sin6->sin6_addr,
NULL);
#endif
} else {
/* clear embedded scope_id for user */
in6_clearscope(&sin6->sin6_addr);
}
}
#endif /* SCTP_EMBEDDED_V6_SCOPE */
break;
}
#endif
#if defined(__Userspace__)
case AF_CONN:
memcpy(&spc->spc_aaddr, sa, sizeof(struct sockaddr_conn));
break;
#endif
default:
/* TSNH */
break;
}
spc->spc_state = state;
spc->spc_error = error;
spc->spc_assoc_id = sctp_get_associd(stcb);
SCTP_BUF_LEN(m_notify) = sizeof(struct sctp_paddr_change);
SCTP_BUF_NEXT(m_notify) = NULL;
/* append to socket */
control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination,
0, 0, stcb->asoc.context, 0, 0, 0,
m_notify);
if (control == NULL) {
/* no memory */
sctp_m_freem(m_notify);
return;
}
control->length = SCTP_BUF_LEN(m_notify);
control->spec_flags = M_NOTIFICATION;
/* not that we need this */
control->tail_mbuf = m_notify;
sctp_add_to_readq(stcb->sctp_ep, stcb,
control,
&stcb->sctp_socket->so_rcv, 1,
SCTP_READ_LOCK_NOT_HELD,
so_locked);
}
static void
sctp_notify_send_failed(struct sctp_tcb *stcb, uint8_t sent, uint32_t error,
struct sctp_tmit_chunk *chk, int so_locked)
{
struct mbuf *m_notify;
struct sctp_send_failed *ssf;
struct sctp_send_failed_event *ssfe;
struct sctp_queued_to_read *control;
struct sctp_chunkhdr *chkhdr;
int notifhdr_len, chk_len, chkhdr_len, padding_len, payload_len;
if ((stcb == NULL) ||
(sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVSENDFAILEVNT) &&
sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVNSENDFAILEVNT))) {
/* event not enabled */
return;
}
if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVNSENDFAILEVNT)) {
notifhdr_len = sizeof(struct sctp_send_failed_event);
} else {
notifhdr_len = sizeof(struct sctp_send_failed);
}
m_notify = sctp_get_mbuf_for_msg(notifhdr_len, 0, M_NOWAIT, 1, MT_DATA);
if (m_notify == NULL)
/* no space left */
return;
SCTP_BUF_LEN(m_notify) = notifhdr_len;
if (stcb->asoc.idata_supported) {
chkhdr_len = sizeof(struct sctp_idata_chunk);
} else {
chkhdr_len = sizeof(struct sctp_data_chunk);
}
/* Use some defaults in case we can't access the chunk header */
if (chk->send_size >= chkhdr_len) {
payload_len = chk->send_size - chkhdr_len;
} else {
payload_len = 0;
}
padding_len = 0;
if (chk->data != NULL) {
chkhdr = mtod(chk->data, struct sctp_chunkhdr *);
if (chkhdr != NULL) {
chk_len = ntohs(chkhdr->chunk_length);
if ((chk_len >= chkhdr_len) &&
(chk->send_size >= chk_len) &&
(chk->send_size - chk_len < 4)) {
padding_len = chk->send_size - chk_len;
payload_len = chk->send_size - chkhdr_len - padding_len;
}
}
}
if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVNSENDFAILEVNT)) {
ssfe = mtod(m_notify, struct sctp_send_failed_event *);
memset(ssfe, 0, notifhdr_len);
ssfe->ssfe_type = SCTP_SEND_FAILED_EVENT;
if (sent) {
ssfe->ssfe_flags = SCTP_DATA_SENT;
} else {
ssfe->ssfe_flags = SCTP_DATA_UNSENT;
}
ssfe->ssfe_length = (uint32_t)(notifhdr_len + payload_len);
ssfe->ssfe_error = error;
/* not exactly what the user sent in, but should be close :) */
ssfe->ssfe_info.snd_sid = chk->rec.data.sid;
ssfe->ssfe_info.snd_flags = chk->rec.data.rcv_flags;
ssfe->ssfe_info.snd_ppid = chk->rec.data.ppid;
ssfe->ssfe_info.snd_context = chk->rec.data.context;
ssfe->ssfe_info.snd_assoc_id = sctp_get_associd(stcb);
ssfe->ssfe_assoc_id = sctp_get_associd(stcb);
} else {
ssf = mtod(m_notify, struct sctp_send_failed *);
memset(ssf, 0, notifhdr_len);
ssf->ssf_type = SCTP_SEND_FAILED;
if (sent) {
ssf->ssf_flags = SCTP_DATA_SENT;
} else {
ssf->ssf_flags = SCTP_DATA_UNSENT;
}
ssf->ssf_length = (uint32_t)(notifhdr_len + payload_len);
ssf->ssf_error = error;
/* not exactly what the user sent in, but should be close :) */
ssf->ssf_info.sinfo_stream = chk->rec.data.sid;
ssf->ssf_info.sinfo_ssn = (uint16_t)chk->rec.data.mid;
ssf->ssf_info.sinfo_flags = chk->rec.data.rcv_flags;
ssf->ssf_info.sinfo_ppid = chk->rec.data.ppid;
ssf->ssf_info.sinfo_context = chk->rec.data.context;
ssf->ssf_info.sinfo_assoc_id = sctp_get_associd(stcb);
ssf->ssf_assoc_id = sctp_get_associd(stcb);
}
if (chk->data != NULL) {
/* Trim off the sctp chunk header (it should be there) */
if (chk->send_size == chkhdr_len + payload_len + padding_len) {
m_adj(chk->data, chkhdr_len);
m_adj(chk->data, -padding_len);
sctp_mbuf_crush(chk->data);
chk->send_size -= (chkhdr_len + padding_len);
}
}
SCTP_BUF_NEXT(m_notify) = chk->data;
/* Steal off the mbuf */
chk->data = NULL;
/*
* For this case, we check the actual socket buffer, since the assoc
* is going away we don't want to overfill the socket buffer for a
* non-reader
*/
if (sctp_sbspace_failedmsgs(&stcb->sctp_socket->so_rcv) < SCTP_BUF_LEN(m_notify)) {
sctp_m_freem(m_notify);
return;
}
/* append to socket */
control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination,
0, 0, stcb->asoc.context, 0, 0, 0,
m_notify);
if (control == NULL) {
/* no memory */
sctp_m_freem(m_notify);
return;
}
control->length = SCTP_BUF_LEN(m_notify);
control->spec_flags = M_NOTIFICATION;
/* not that we need this */
control->tail_mbuf = m_notify;
sctp_add_to_readq(stcb->sctp_ep, stcb,
control,
&stcb->sctp_socket->so_rcv, 1,
SCTP_READ_LOCK_NOT_HELD,
so_locked);
}
static void
sctp_notify_send_failed2(struct sctp_tcb *stcb, uint32_t error,
struct sctp_stream_queue_pending *sp, int so_locked)
{
struct mbuf *m_notify;
struct sctp_send_failed *ssf;
struct sctp_send_failed_event *ssfe;
struct sctp_queued_to_read *control;
int notifhdr_len;
if ((stcb == NULL) ||
(sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVSENDFAILEVNT) &&
sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVNSENDFAILEVNT))) {
/* event not enabled */
return;
}
if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVNSENDFAILEVNT)) {
notifhdr_len = sizeof(struct sctp_send_failed_event);
} else {
notifhdr_len = sizeof(struct sctp_send_failed);
}
m_notify = sctp_get_mbuf_for_msg(notifhdr_len, 0, M_NOWAIT, 1, MT_DATA);
if (m_notify == NULL) {
/* no space left */
return;
}
SCTP_BUF_LEN(m_notify) = notifhdr_len;
if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVNSENDFAILEVNT)) {
ssfe = mtod(m_notify, struct sctp_send_failed_event *);
memset(ssfe, 0, notifhdr_len);
ssfe->ssfe_type = SCTP_SEND_FAILED_EVENT;
ssfe->ssfe_flags = SCTP_DATA_UNSENT;
ssfe->ssfe_length = (uint32_t)(notifhdr_len + sp->length);
ssfe->ssfe_error = error;
/* not exactly what the user sent in, but should be close :) */
ssfe->ssfe_info.snd_sid = sp->sid;
if (sp->some_taken) {
ssfe->ssfe_info.snd_flags = SCTP_DATA_LAST_FRAG;
} else {
ssfe->ssfe_info.snd_flags = SCTP_DATA_NOT_FRAG;
}
ssfe->ssfe_info.snd_ppid = sp->ppid;
ssfe->ssfe_info.snd_context = sp->context;
ssfe->ssfe_info.snd_assoc_id = sctp_get_associd(stcb);
ssfe->ssfe_assoc_id = sctp_get_associd(stcb);
} else {
ssf = mtod(m_notify, struct sctp_send_failed *);
memset(ssf, 0, notifhdr_len);
ssf->ssf_type = SCTP_SEND_FAILED;
ssf->ssf_flags = SCTP_DATA_UNSENT;
ssf->ssf_length = (uint32_t)(notifhdr_len + sp->length);
ssf->ssf_error = error;
/* not exactly what the user sent in, but should be close :) */
ssf->ssf_info.sinfo_stream = sp->sid;
ssf->ssf_info.sinfo_ssn = 0;
if (sp->some_taken) {
ssf->ssf_info.sinfo_flags = SCTP_DATA_LAST_FRAG;
} else {
ssf->ssf_info.sinfo_flags = SCTP_DATA_NOT_FRAG;
}
ssf->ssf_info.sinfo_ppid = sp->ppid;
ssf->ssf_info.sinfo_context = sp->context;
ssf->ssf_info.sinfo_assoc_id = sctp_get_associd(stcb);
ssf->ssf_assoc_id = sctp_get_associd(stcb);
}
SCTP_BUF_NEXT(m_notify) = sp->data;
/* Steal off the mbuf */
sp->data = NULL;
/*
* For this case, we check the actual socket buffer, since the assoc
* is going away we don't want to overfill the socket buffer for a
* non-reader
*/
if (sctp_sbspace_failedmsgs(&stcb->sctp_socket->so_rcv) < SCTP_BUF_LEN(m_notify)) {
sctp_m_freem(m_notify);
return;
}
/* append to socket */
control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination,
0, 0, stcb->asoc.context, 0, 0, 0,
m_notify);
if (control == NULL) {
/* no memory */
sctp_m_freem(m_notify);
return;
}
control->length = SCTP_BUF_LEN(m_notify);
control->spec_flags = M_NOTIFICATION;
/* not that we need this */
control->tail_mbuf = m_notify;
sctp_add_to_readq(stcb->sctp_ep, stcb,
control,
&stcb->sctp_socket->so_rcv, 1, SCTP_READ_LOCK_NOT_HELD, so_locked);
}
static void
sctp_notify_adaptation_layer(struct sctp_tcb *stcb)
{
struct mbuf *m_notify;
struct sctp_adaptation_event *sai;
struct sctp_queued_to_read *control;
if ((stcb == NULL) ||
sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_ADAPTATIONEVNT)) {
/* event not enabled */
return;
}
m_notify = sctp_get_mbuf_for_msg(sizeof(struct sctp_adaption_event), 0, M_NOWAIT, 1, MT_DATA);
if (m_notify == NULL)
/* no space left */
return;
SCTP_BUF_LEN(m_notify) = 0;
sai = mtod(m_notify, struct sctp_adaptation_event *);
memset(sai, 0, sizeof(struct sctp_adaptation_event));
sai->sai_type = SCTP_ADAPTATION_INDICATION;
sai->sai_flags = 0;
sai->sai_length = sizeof(struct sctp_adaptation_event);
sai->sai_adaptation_ind = stcb->asoc.peers_adaptation;
sai->sai_assoc_id = sctp_get_associd(stcb);
SCTP_BUF_LEN(m_notify) = sizeof(struct sctp_adaptation_event);
SCTP_BUF_NEXT(m_notify) = NULL;
/* append to socket */
control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination,
0, 0, stcb->asoc.context, 0, 0, 0,
m_notify);
if (control == NULL) {
/* no memory */
sctp_m_freem(m_notify);
return;
}
control->length = SCTP_BUF_LEN(m_notify);
control->spec_flags = M_NOTIFICATION;
/* not that we need this */
control->tail_mbuf = m_notify;
sctp_add_to_readq(stcb->sctp_ep, stcb,
control,
&stcb->sctp_socket->so_rcv, 1, SCTP_READ_LOCK_NOT_HELD, SCTP_SO_NOT_LOCKED);
}
/* This always must be called with the read-queue LOCKED in the INP */
static void
sctp_notify_partial_delivery_indication(struct sctp_tcb *stcb, uint32_t error,
uint32_t val, int so_locked)
{
struct mbuf *m_notify;
struct sctp_pdapi_event *pdapi;
struct sctp_queued_to_read *control;
struct sockbuf *sb;
if ((stcb == NULL) ||
sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_PDAPIEVNT)) {
/* event not enabled */
return;
}
if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_CANT_READ) {
return;
}
m_notify = sctp_get_mbuf_for_msg(sizeof(struct sctp_pdapi_event), 0, M_NOWAIT, 1, MT_DATA);
if (m_notify == NULL)
/* no space left */
return;
SCTP_BUF_LEN(m_notify) = 0;
pdapi = mtod(m_notify, struct sctp_pdapi_event *);
memset(pdapi, 0, sizeof(struct sctp_pdapi_event));
pdapi->pdapi_type = SCTP_PARTIAL_DELIVERY_EVENT;
pdapi->pdapi_flags = 0;
pdapi->pdapi_length = sizeof(struct sctp_pdapi_event);
pdapi->pdapi_indication = error;
pdapi->pdapi_stream = (val >> 16);
pdapi->pdapi_seq = (val & 0x0000ffff);
pdapi->pdapi_assoc_id = sctp_get_associd(stcb);
SCTP_BUF_LEN(m_notify) = sizeof(struct sctp_pdapi_event);
SCTP_BUF_NEXT(m_notify) = NULL;
control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination,
0, 0, stcb->asoc.context, 0, 0, 0,
m_notify);
if (control == NULL) {
/* no memory */
sctp_m_freem(m_notify);
return;
}
control->length = SCTP_BUF_LEN(m_notify);
control->spec_flags = M_NOTIFICATION;
/* not that we need this */
control->tail_mbuf = m_notify;
sb = &stcb->sctp_socket->so_rcv;
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
sctp_sblog(sb, control->do_not_ref_stcb?NULL:stcb, SCTP_LOG_SBALLOC, SCTP_BUF_LEN(m_notify));
}
sctp_sballoc(stcb, sb, m_notify);
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
sctp_sblog(sb, control->do_not_ref_stcb?NULL:stcb, SCTP_LOG_SBRESULT, 0);
}
control->end_added = 1;
if (stcb->asoc.control_pdapi)
TAILQ_INSERT_AFTER(&stcb->sctp_ep->read_queue, stcb->asoc.control_pdapi, control, next);
else {
/* we really should not see this case */
TAILQ_INSERT_TAIL(&stcb->sctp_ep->read_queue, control, next);
}
if (stcb->sctp_ep && stcb->sctp_socket) {
/* This should always be the case */
#if defined(__APPLE__) && !defined(__Userspace__)
struct socket *so;
so = SCTP_INP_SO(stcb->sctp_ep);
if (!so_locked) {
atomic_add_int(&stcb->asoc.refcnt, 1);
SCTP_TCB_UNLOCK(stcb);
SCTP_SOCKET_LOCK(so, 1);
SCTP_TCB_LOCK(stcb);
atomic_subtract_int(&stcb->asoc.refcnt, 1);
if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
SCTP_SOCKET_UNLOCK(so, 1);
return;
}
}
#endif
sctp_sorwakeup(stcb->sctp_ep, stcb->sctp_socket);
#if defined(__APPLE__) && !defined(__Userspace__)
if (!so_locked) {
SCTP_SOCKET_UNLOCK(so, 1);
}
#endif
}
}
static void
sctp_notify_shutdown_event(struct sctp_tcb *stcb)
{
struct mbuf *m_notify;
struct sctp_shutdown_event *sse;
struct sctp_queued_to_read *control;
/*
* For TCP model AND UDP connected sockets we will send an error up
* when an SHUTDOWN completes
*/
if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
(stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
/* mark socket closed for read/write and wakeup! */
#if defined(__APPLE__) && !defined(__Userspace__)
struct socket *so;
so = SCTP_INP_SO(stcb->sctp_ep);
atomic_add_int(&stcb->asoc.refcnt, 1);
SCTP_TCB_UNLOCK(stcb);
SCTP_SOCKET_LOCK(so, 1);
SCTP_TCB_LOCK(stcb);
atomic_subtract_int(&stcb->asoc.refcnt, 1);
if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
SCTP_SOCKET_UNLOCK(so, 1);
return;
}
#endif
socantsendmore(stcb->sctp_socket);
#if defined(__APPLE__) && !defined(__Userspace__)
SCTP_SOCKET_UNLOCK(so, 1);
#endif
}
if (sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVSHUTDOWNEVNT)) {
/* event not enabled */
return;
}
m_notify = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_event), 0, M_NOWAIT, 1, MT_DATA);
if (m_notify == NULL)
/* no space left */
return;
sse = mtod(m_notify, struct sctp_shutdown_event *);
memset(sse, 0, sizeof(struct sctp_shutdown_event));
sse->sse_type = SCTP_SHUTDOWN_EVENT;
sse->sse_flags = 0;
sse->sse_length = sizeof(struct sctp_shutdown_event);
sse->sse_assoc_id = sctp_get_associd(stcb);
SCTP_BUF_LEN(m_notify) = sizeof(struct sctp_shutdown_event);
SCTP_BUF_NEXT(m_notify) = NULL;
/* append to socket */
control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination,
0, 0, stcb->asoc.context, 0, 0, 0,
m_notify);
if (control == NULL) {
/* no memory */
sctp_m_freem(m_notify);
return;
}
control->length = SCTP_BUF_LEN(m_notify);
control->spec_flags = M_NOTIFICATION;
/* not that we need this */
control->tail_mbuf = m_notify;
sctp_add_to_readq(stcb->sctp_ep, stcb,
control,
&stcb->sctp_socket->so_rcv, 1, SCTP_READ_LOCK_NOT_HELD, SCTP_SO_NOT_LOCKED);
}
static void
sctp_notify_sender_dry_event(struct sctp_tcb *stcb,
int so_locked)
{
struct mbuf *m_notify;
struct sctp_sender_dry_event *event;
struct sctp_queued_to_read *control;
if ((stcb == NULL) ||
sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DRYEVNT)) {
/* event not enabled */
return;
}
m_notify = sctp_get_mbuf_for_msg(sizeof(struct sctp_sender_dry_event), 0, M_NOWAIT, 1, MT_DATA);
if (m_notify == NULL) {
/* no space left */
return;
}
SCTP_BUF_LEN(m_notify) = 0;
event = mtod(m_notify, struct sctp_sender_dry_event *);
memset(event, 0, sizeof(struct sctp_sender_dry_event));
event->sender_dry_type = SCTP_SENDER_DRY_EVENT;
event->sender_dry_flags = 0;
event->sender_dry_length = sizeof(struct sctp_sender_dry_event);
event->sender_dry_assoc_id = sctp_get_associd(stcb);
SCTP_BUF_LEN(m_notify) = sizeof(struct sctp_sender_dry_event);
SCTP_BUF_NEXT(m_notify) = NULL;
/* append to socket */
control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination,
0, 0, stcb->asoc.context, 0, 0, 0,
m_notify);
if (control == NULL) {
/* no memory */
sctp_m_freem(m_notify);
return;
}
control->length = SCTP_BUF_LEN(m_notify);
control->spec_flags = M_NOTIFICATION;
/* not that we need this */
control->tail_mbuf = m_notify;
sctp_add_to_readq(stcb->sctp_ep, stcb, control,
&stcb->sctp_socket->so_rcv, 1, SCTP_READ_LOCK_NOT_HELD, so_locked);
}
void
sctp_notify_stream_reset_add(struct sctp_tcb *stcb, uint16_t numberin, uint16_t numberout, int flag)
{
struct mbuf *m_notify;
struct sctp_queued_to_read *control;
struct sctp_stream_change_event *stradd;
if ((stcb == NULL) ||
(sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_STREAM_CHANGEEVNT))) {
/* event not enabled */
return;
}
if ((stcb->asoc.peer_req_out) && flag) {
/* Peer made the request, don't tell the local user */
stcb->asoc.peer_req_out = 0;
return;
}
stcb->asoc.peer_req_out = 0;
m_notify = sctp_get_mbuf_for_msg(sizeof(struct sctp_stream_change_event), 0, M_NOWAIT, 1, MT_DATA);
if (m_notify == NULL)
/* no space left */
return;
SCTP_BUF_LEN(m_notify) = 0;
stradd = mtod(m_notify, struct sctp_stream_change_event *);
memset(stradd, 0, sizeof(struct sctp_stream_change_event));
stradd->strchange_type = SCTP_STREAM_CHANGE_EVENT;
stradd->strchange_flags = flag;
stradd->strchange_length = sizeof(struct sctp_stream_change_event);
stradd->strchange_assoc_id = sctp_get_associd(stcb);
stradd->strchange_instrms = numberin;
stradd->strchange_outstrms = numberout;
SCTP_BUF_LEN(m_notify) = sizeof(struct sctp_stream_change_event);
SCTP_BUF_NEXT(m_notify) = NULL;
if (sctp_sbspace(&stcb->asoc, &stcb->sctp_socket->so_rcv) < SCTP_BUF_LEN(m_notify)) {
/* no space */
sctp_m_freem(m_notify);
return;
}
/* append to socket */
control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination,
0, 0, stcb->asoc.context, 0, 0, 0,
m_notify);
if (control == NULL) {
/* no memory */
sctp_m_freem(m_notify);
return;
}
control->length = SCTP_BUF_LEN(m_notify);
control->spec_flags = M_NOTIFICATION;
/* not that we need this */
control->tail_mbuf = m_notify;
sctp_add_to_readq(stcb->sctp_ep, stcb,
control,
&stcb->sctp_socket->so_rcv, 1, SCTP_READ_LOCK_NOT_HELD, SCTP_SO_NOT_LOCKED);
}
void
sctp_notify_stream_reset_tsn(struct sctp_tcb *stcb, uint32_t sending_tsn, uint32_t recv_tsn, int flag)
{
struct mbuf *m_notify;
struct sctp_queued_to_read *control;
struct sctp_assoc_reset_event *strasoc;
if ((stcb == NULL) ||
(sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_ASSOC_RESETEVNT))) {
/* event not enabled */
return;
}
m_notify = sctp_get_mbuf_for_msg(sizeof(struct sctp_assoc_reset_event), 0, M_NOWAIT, 1, MT_DATA);
if (m_notify == NULL)
/* no space left */
return;
SCTP_BUF_LEN(m_notify) = 0;
strasoc = mtod(m_notify, struct sctp_assoc_reset_event *);
memset(strasoc, 0, sizeof(struct sctp_assoc_reset_event));
strasoc->assocreset_type = SCTP_ASSOC_RESET_EVENT;
strasoc->assocreset_flags = flag;
strasoc->assocreset_length = sizeof(struct sctp_assoc_reset_event);
strasoc->assocreset_assoc_id= sctp_get_associd(stcb);
strasoc->assocreset_local_tsn = sending_tsn;
strasoc->assocreset_remote_tsn = recv_tsn;
SCTP_BUF_LEN(m_notify) = sizeof(struct sctp_assoc_reset_event);
SCTP_BUF_NEXT(m_notify) = NULL;
if (sctp_sbspace(&stcb->asoc, &stcb->sctp_socket->so_rcv) < SCTP_BUF_LEN(m_notify)) {
/* no space */
sctp_m_freem(m_notify);
return;
}
/* append to socket */
control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination,
0, 0, stcb->asoc.context, 0, 0, 0,
m_notify);
if (control == NULL) {
/* no memory */
sctp_m_freem(m_notify);
return;
}
control->length = SCTP_BUF_LEN(m_notify);
control->spec_flags = M_NOTIFICATION;
/* not that we need this */
control->tail_mbuf = m_notify;
sctp_add_to_readq(stcb->sctp_ep, stcb,
control,
&stcb->sctp_socket->so_rcv, 1, SCTP_READ_LOCK_NOT_HELD, SCTP_SO_NOT_LOCKED);
}
static void
sctp_notify_stream_reset(struct sctp_tcb *stcb,
int number_entries, uint16_t * list, int flag)
{
struct mbuf *m_notify;
struct sctp_queued_to_read *control;
struct sctp_stream_reset_event *strreset;
int len;
if ((stcb == NULL) ||
(sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_STREAM_RESETEVNT))) {
/* event not enabled */
return;
}
m_notify = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
if (m_notify == NULL)
/* no space left */
return;
SCTP_BUF_LEN(m_notify) = 0;
len = sizeof(struct sctp_stream_reset_event) + (number_entries * sizeof(uint16_t));
if (len > M_TRAILINGSPACE(m_notify)) {
/* never enough room */
sctp_m_freem(m_notify);
return;
}
strreset = mtod(m_notify, struct sctp_stream_reset_event *);
memset(strreset, 0, len);
strreset->strreset_type = SCTP_STREAM_RESET_EVENT;
strreset->strreset_flags = flag;
strreset->strreset_length = len;
strreset->strreset_assoc_id = sctp_get_associd(stcb);
if (number_entries) {
int i;
for (i = 0; i < number_entries; i++) {
strreset->strreset_stream_list[i] = ntohs(list[i]);
}
}
SCTP_BUF_LEN(m_notify) = len;
SCTP_BUF_NEXT(m_notify) = NULL;
if (sctp_sbspace(&stcb->asoc, &stcb->sctp_socket->so_rcv) < SCTP_BUF_LEN(m_notify)) {
/* no space */
sctp_m_freem(m_notify);
return;
}
/* append to socket */
control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination,
0, 0, stcb->asoc.context, 0, 0, 0,
m_notify);
if (control == NULL) {
/* no memory */
sctp_m_freem(m_notify);
return;
}
control->length = SCTP_BUF_LEN(m_notify);
control->spec_flags = M_NOTIFICATION;
/* not that we need this */
control->tail_mbuf = m_notify;
sctp_add_to_readq(stcb->sctp_ep, stcb,
control,
&stcb->sctp_socket->so_rcv, 1, SCTP_READ_LOCK_NOT_HELD, SCTP_SO_NOT_LOCKED);
}
static void
sctp_notify_remote_error(struct sctp_tcb *stcb, uint16_t error, struct sctp_error_chunk *chunk)
{
struct mbuf *m_notify;
struct sctp_remote_error *sre;
struct sctp_queued_to_read *control;
unsigned int notif_len;
uint16_t chunk_len;
if ((stcb == NULL) ||
sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVPEERERR)) {
return;
}
if (chunk != NULL) {
chunk_len = ntohs(chunk->ch.chunk_length);
/*
* Only SCTP_CHUNK_BUFFER_SIZE are guaranteed to be
* contiguous.
*/
if (chunk_len > SCTP_CHUNK_BUFFER_SIZE) {
chunk_len = SCTP_CHUNK_BUFFER_SIZE;
}
} else {
chunk_len = 0;
}
notif_len = (unsigned int)(sizeof(struct sctp_remote_error) + chunk_len);
m_notify = sctp_get_mbuf_for_msg(notif_len, 0, M_NOWAIT, 1, MT_DATA);
if (m_notify == NULL) {
/* Retry with smaller value. */
notif_len = (unsigned int)sizeof(struct sctp_remote_error);
m_notify = sctp_get_mbuf_for_msg(notif_len, 0, M_NOWAIT, 1, MT_DATA);
if (m_notify == NULL) {
return;
}
}
SCTP_BUF_NEXT(m_notify) = NULL;
sre = mtod(m_notify, struct sctp_remote_error *);
memset(sre, 0, notif_len);
sre->sre_type = SCTP_REMOTE_ERROR;
sre->sre_flags = 0;
sre->sre_length = sizeof(struct sctp_remote_error);
sre->sre_error = error;
sre->sre_assoc_id = sctp_get_associd(stcb);
if (notif_len > sizeof(struct sctp_remote_error)) {
memcpy(sre->sre_data, chunk, chunk_len);
sre->sre_length += chunk_len;
}
SCTP_BUF_LEN(m_notify) = sre->sre_length;
control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination,
0, 0, stcb->asoc.context, 0, 0, 0,
m_notify);
if (control != NULL) {
control->length = SCTP_BUF_LEN(m_notify);
control->spec_flags = M_NOTIFICATION;
/* not that we need this */
control->tail_mbuf = m_notify;
sctp_add_to_readq(stcb->sctp_ep, stcb,
control,
&stcb->sctp_socket->so_rcv, 1,
SCTP_READ_LOCK_NOT_HELD, SCTP_SO_NOT_LOCKED);
} else {
sctp_m_freem(m_notify);
}
}
void
sctp_ulp_notify(uint32_t notification, struct sctp_tcb *stcb,
uint32_t error, void *data, int so_locked)
{
if ((stcb == NULL) ||
(stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
(stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
(stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET)) {
/* If the socket is gone we are out of here */
return;
}
#if (defined(__FreeBSD__) || defined(_WIN32)) && !defined(__Userspace__)
if (stcb->sctp_socket->so_rcv.sb_state & SBS_CANTRCVMORE) {
#else
if (stcb->sctp_socket->so_state & SS_CANTRCVMORE) {
#endif
return;
}
#if defined(__APPLE__) && !defined(__Userspace__)
if (so_locked) {
sctp_lock_assert(SCTP_INP_SO(stcb->sctp_ep));
} else {
sctp_unlock_assert(SCTP_INP_SO(stcb->sctp_ep));
}
#endif
if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
(SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
if ((notification == SCTP_NOTIFY_INTERFACE_DOWN) ||
(notification == SCTP_NOTIFY_INTERFACE_UP) ||
(notification == SCTP_NOTIFY_INTERFACE_CONFIRMED)) {
/* Don't report these in front states */
return;
}
}
switch (notification) {
case SCTP_NOTIFY_ASSOC_UP:
if (stcb->asoc.assoc_up_sent == 0) {
sctp_notify_assoc_change(SCTP_COMM_UP, stcb, error, NULL, 0, so_locked);
stcb->asoc.assoc_up_sent = 1;
}
if (stcb->asoc.adaptation_needed && (stcb->asoc.adaptation_sent == 0)) {
sctp_notify_adaptation_layer(stcb);
}
if (stcb->asoc.auth_supported == 0) {
sctp_ulp_notify(SCTP_NOTIFY_NO_PEER_AUTH, stcb, 0,
NULL, so_locked);
}
break;
case SCTP_NOTIFY_ASSOC_DOWN:
sctp_notify_assoc_change(SCTP_SHUTDOWN_COMP, stcb, error, NULL, 0, so_locked);
#if defined(__Userspace__)
if (stcb->sctp_ep->recv_callback) {
if (stcb->sctp_socket) {
union sctp_sockstore addr;
struct sctp_rcvinfo rcv;
memset(&addr, 0, sizeof(union sctp_sockstore));
memset(&rcv, 0, sizeof(struct sctp_rcvinfo));
atomic_add_int(&stcb->asoc.refcnt, 1);
SCTP_TCB_UNLOCK(stcb);
stcb->sctp_ep->recv_callback(stcb->sctp_socket, addr, NULL, 0, rcv, 0, stcb->sctp_ep->ulp_info);
SCTP_TCB_LOCK(stcb);
atomic_subtract_int(&stcb->asoc.refcnt, 1);
}
}
#endif
break;
case SCTP_NOTIFY_INTERFACE_DOWN:
{
struct sctp_nets *net;
net = (struct sctp_nets *)data;
sctp_notify_peer_addr_change(stcb, SCTP_ADDR_UNREACHABLE,
(struct sockaddr *)&net->ro._l_addr, error, so_locked);
break;
}
case SCTP_NOTIFY_INTERFACE_UP:
{
struct sctp_nets *net;
net = (struct sctp_nets *)data;
sctp_notify_peer_addr_change(stcb, SCTP_ADDR_AVAILABLE,
(struct sockaddr *)&net->ro._l_addr, error, so_locked);
break;
}
case SCTP_NOTIFY_INTERFACE_CONFIRMED:
{
struct sctp_nets *net;
net = (struct sctp_nets *)data;
sctp_notify_peer_addr_change(stcb, SCTP_ADDR_CONFIRMED,
(struct sockaddr *)&net->ro._l_addr, error, so_locked);
break;
}
case SCTP_NOTIFY_SPECIAL_SP_FAIL:
sctp_notify_send_failed2(stcb, error,
(struct sctp_stream_queue_pending *)data, so_locked);
break;
case SCTP_NOTIFY_SENT_DG_FAIL:
sctp_notify_send_failed(stcb, 1, error,
(struct sctp_tmit_chunk *)data, so_locked);
break;
case SCTP_NOTIFY_UNSENT_DG_FAIL:
sctp_notify_send_failed(stcb, 0, error,
(struct sctp_tmit_chunk *)data, so_locked);
break;
case SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION:
{
uint32_t val;
val = *((uint32_t *)data);
sctp_notify_partial_delivery_indication(stcb, error, val, so_locked);
break;
}
case SCTP_NOTIFY_ASSOC_LOC_ABORTED:
if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
(SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
sctp_notify_assoc_change(SCTP_CANT_STR_ASSOC, stcb, error, data, 0, so_locked);
} else {
sctp_notify_assoc_change(SCTP_COMM_LOST, stcb, error, data, 0, so_locked);
}
break;
case SCTP_NOTIFY_ASSOC_REM_ABORTED:
if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
(SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
sctp_notify_assoc_change(SCTP_CANT_STR_ASSOC, stcb, error, data, 1, so_locked);
} else {
sctp_notify_assoc_change(SCTP_COMM_LOST, stcb, error, data, 1, so_locked);
}
break;
case SCTP_NOTIFY_ASSOC_RESTART:
sctp_notify_assoc_change(SCTP_RESTART, stcb, error, NULL, 0, so_locked);
if (stcb->asoc.auth_supported == 0) {
sctp_ulp_notify(SCTP_NOTIFY_NO_PEER_AUTH, stcb, 0,
NULL, so_locked);
}
break;
case SCTP_NOTIFY_STR_RESET_SEND:
sctp_notify_stream_reset(stcb, error, ((uint16_t *) data), SCTP_STREAM_RESET_OUTGOING_SSN);
break;
case SCTP_NOTIFY_STR_RESET_RECV:
sctp_notify_stream_reset(stcb, error, ((uint16_t *) data), SCTP_STREAM_RESET_INCOMING);
break;
case SCTP_NOTIFY_STR_RESET_FAILED_OUT:
sctp_notify_stream_reset(stcb, error, ((uint16_t *) data),
(SCTP_STREAM_RESET_OUTGOING_SSN|SCTP_STREAM_RESET_FAILED));
break;
case SCTP_NOTIFY_STR_RESET_DENIED_OUT:
sctp_notify_stream_reset(stcb, error, ((uint16_t *) data),
(SCTP_STREAM_RESET_OUTGOING_SSN|SCTP_STREAM_RESET_DENIED));
break;
case SCTP_NOTIFY_STR_RESET_FAILED_IN:
sctp_notify_stream_reset(stcb, error, ((uint16_t *) data),
(SCTP_STREAM_RESET_INCOMING|SCTP_STREAM_RESET_FAILED));
break;
case SCTP_NOTIFY_STR_RESET_DENIED_IN:
sctp_notify_stream_reset(stcb, error, ((uint16_t *) data),
(SCTP_STREAM_RESET_INCOMING|SCTP_STREAM_RESET_DENIED));
break;
case SCTP_NOTIFY_ASCONF_ADD_IP:
sctp_notify_peer_addr_change(stcb, SCTP_ADDR_ADDED, data,
error, so_locked);
break;
case SCTP_NOTIFY_ASCONF_DELETE_IP:
sctp_notify_peer_addr_change(stcb, SCTP_ADDR_REMOVED, data,
error, so_locked);
break;
case SCTP_NOTIFY_ASCONF_SET_PRIMARY:
sctp_notify_peer_addr_change(stcb, SCTP_ADDR_MADE_PRIM, data,
error, so_locked);
break;
case SCTP_NOTIFY_PEER_SHUTDOWN:
sctp_notify_shutdown_event(stcb);
break;
case SCTP_NOTIFY_AUTH_NEW_KEY:
sctp_notify_authentication(stcb, SCTP_AUTH_NEW_KEY, error,
(uint16_t)(uintptr_t)data,
so_locked);
break;
case SCTP_NOTIFY_AUTH_FREE_KEY:
sctp_notify_authentication(stcb, SCTP_AUTH_FREE_KEY, error,
(uint16_t)(uintptr_t)data,
so_locked);
break;
case SCTP_NOTIFY_NO_PEER_AUTH:
sctp_notify_authentication(stcb, SCTP_AUTH_NO_AUTH, error,
(uint16_t)(uintptr_t)data,
so_locked);
break;
case SCTP_NOTIFY_SENDER_DRY:
sctp_notify_sender_dry_event(stcb, so_locked);
break;
case SCTP_NOTIFY_REMOTE_ERROR:
sctp_notify_remote_error(stcb, error, data);
break;
default:
SCTPDBG(SCTP_DEBUG_UTIL1, "%s: unknown notification %xh (%u)\n",
__func__, notification, notification);
break;
} /* end switch */
}
void
sctp_report_all_outbound(struct sctp_tcb *stcb, uint16_t error, int holds_lock, int so_locked)
{
struct sctp_association *asoc;
struct sctp_stream_out *outs;
struct sctp_tmit_chunk *chk, *nchk;
struct sctp_stream_queue_pending *sp, *nsp;
int i;
if (stcb == NULL) {
return;
}
asoc = &stcb->asoc;
if (asoc->state & SCTP_STATE_ABOUT_TO_BE_FREED) {
/* already being freed */
return;
}
#if defined(__APPLE__) && !defined(__Userspace__)
if (so_locked) {
sctp_lock_assert(SCTP_INP_SO(stcb->sctp_ep));
} else {
sctp_unlock_assert(SCTP_INP_SO(stcb->sctp_ep));
}
#endif
if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
(stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
(asoc->state & SCTP_STATE_CLOSED_SOCKET)) {
return;
}
/* now through all the gunk freeing chunks */
if (holds_lock == 0) {
SCTP_TCB_SEND_LOCK(stcb);
}
/* sent queue SHOULD be empty */
TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
asoc->sent_queue_cnt--;
if (chk->sent != SCTP_DATAGRAM_NR_ACKED) {
if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
#ifdef INVARIANTS
} else {
panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
#endif
}
}
if (chk->data != NULL) {
sctp_free_bufspace(stcb, asoc, chk, 1);
sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb,
error, chk, so_locked);
if (chk->data) {
sctp_m_freem(chk->data);
chk->data = NULL;
}
}
sctp_free_a_chunk(stcb, chk, so_locked);
/*sa_ignore FREED_MEMORY*/
}
/* pending send queue SHOULD be empty */
TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
asoc->send_queue_cnt--;
if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
#ifdef INVARIANTS
} else {
panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
#endif
}
if (chk->data != NULL) {
sctp_free_bufspace(stcb, asoc, chk, 1);
sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
error, chk, so_locked);
if (chk->data) {
sctp_m_freem(chk->data);
chk->data = NULL;
}
}
sctp_free_a_chunk(stcb, chk, so_locked);
/*sa_ignore FREED_MEMORY*/
}
for (i = 0; i < asoc->streamoutcnt; i++) {
/* For each stream */
outs = &asoc->strmout[i];
/* clean up any sends there */
TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
atomic_subtract_int(&asoc->stream_queue_cnt, 1);
TAILQ_REMOVE(&outs->outqueue, sp, next);
stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp, 1);
sctp_free_spbufspace(stcb, asoc, sp);
if (sp->data) {
sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
error, (void *)sp, so_locked);
if (sp->data) {
sctp_m_freem(sp->data);
sp->data = NULL;
sp->tail_mbuf = NULL;
sp->length = 0;
}
}
if (sp->net) {
sctp_free_remote_addr(sp->net);
sp->net = NULL;
}
/* Free the chunk */
sctp_free_a_strmoq(stcb, sp, so_locked);
/*sa_ignore FREED_MEMORY*/
}
}
if (holds_lock == 0) {
SCTP_TCB_SEND_UNLOCK(stcb);
}
}
void
sctp_abort_notification(struct sctp_tcb *stcb, uint8_t from_peer, uint16_t error,
struct sctp_abort_chunk *abort, int so_locked)
{
if (stcb == NULL) {
return;
}
#if defined(__APPLE__) && !defined(__Userspace__)
if (so_locked) {
sctp_lock_assert(SCTP_INP_SO(stcb->sctp_ep));
} else {
sctp_unlock_assert(SCTP_INP_SO(stcb->sctp_ep));
}
#endif
if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
(stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_WAS_ABORTED;
}
if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
(stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
(stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET)) {
return;
}
/* Tell them we lost the asoc */
sctp_report_all_outbound(stcb, error, 0, so_locked);
if (from_peer) {
sctp_ulp_notify(SCTP_NOTIFY_ASSOC_REM_ABORTED, stcb, error, abort, so_locked);
} else {
sctp_ulp_notify(SCTP_NOTIFY_ASSOC_LOC_ABORTED, stcb, error, abort, so_locked);
}
}
void
sctp_abort_association(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
struct mbuf *m, int iphlen,
struct sockaddr *src, struct sockaddr *dst,
struct sctphdr *sh, struct mbuf *op_err,
#if defined(__FreeBSD__) && !defined(__Userspace__)
uint8_t mflowtype, uint32_t mflowid,
#endif
uint32_t vrf_id, uint16_t port)
{
uint32_t vtag;
#if defined(__APPLE__) && !defined(__Userspace__)
struct socket *so;
#endif
vtag = 0;
if (stcb != NULL) {
vtag = stcb->asoc.peer_vtag;
vrf_id = stcb->asoc.vrf_id;
}
sctp_send_abort(m, iphlen, src, dst, sh, vtag, op_err,
#if defined(__FreeBSD__) && !defined(__Userspace__)
mflowtype, mflowid, inp->fibnum,
#endif
vrf_id, port);
if (stcb != NULL) {
/* We have a TCB to abort, send notification too */
sctp_abort_notification(stcb, 0, 0, NULL, SCTP_SO_NOT_LOCKED);
SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_WAS_ABORTED);
/* Ok, now lets free it */
#if defined(__APPLE__) && !defined(__Userspace__)
so = SCTP_INP_SO(inp);
atomic_add_int(&stcb->asoc.refcnt, 1);
SCTP_TCB_UNLOCK(stcb);
SCTP_SOCKET_LOCK(so, 1);
SCTP_TCB_LOCK(stcb);
atomic_subtract_int(&stcb->asoc.refcnt, 1);
#endif
SCTP_STAT_INCR_COUNTER32(sctps_aborted);
if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
(SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
SCTP_STAT_DECR_GAUGE32(sctps_currestab);
}
(void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
SCTP_FROM_SCTPUTIL + SCTP_LOC_4);
#if defined(__APPLE__) && !defined(__Userspace__)
SCTP_SOCKET_UNLOCK(so, 1);
#endif
}
}
#ifdef SCTP_ASOCLOG_OF_TSNS
void
sctp_print_out_track_log(struct sctp_tcb *stcb)
{
#ifdef NOSIY_PRINTS
int i;
SCTP_PRINTF("Last ep reason:%x\n", stcb->sctp_ep->last_abort_code);
SCTP_PRINTF("IN bound TSN log-aaa\n");
if ((stcb->asoc.tsn_in_at == 0) && (stcb->asoc.tsn_in_wrapped == 0)) {
SCTP_PRINTF("None rcvd\n");
goto none_in;
}
if (stcb->asoc.tsn_in_wrapped) {
for (i = stcb->asoc.tsn_in_at; i < SCTP_TSN_LOG_SIZE; i++) {
SCTP_PRINTF("TSN:%x strm:%d seq:%d flags:%x sz:%d\n",
stcb->asoc.in_tsnlog[i].tsn,
stcb->asoc.in_tsnlog[i].strm,
stcb->asoc.in_tsnlog[i].seq,
stcb->asoc.in_tsnlog[i].flgs,
stcb->asoc.in_tsnlog[i].sz);
}
}
if (stcb->asoc.tsn_in_at) {
for (i = 0; i < stcb->asoc.tsn_in_at; i++) {
SCTP_PRINTF("TSN:%x strm:%d seq:%d flags:%x sz:%d\n",
stcb->asoc.in_tsnlog[i].tsn,
stcb->asoc.in_tsnlog[i].strm,
stcb->asoc.in_tsnlog[i].seq,
stcb->asoc.in_tsnlog[i].flgs,
stcb->asoc.in_tsnlog[i].sz);
}
}
none_in:
SCTP_PRINTF("OUT bound TSN log-aaa\n");
if ((stcb->asoc.tsn_out_at == 0) &&
(stcb->asoc.tsn_out_wrapped == 0)) {
SCTP_PRINTF("None sent\n");
}
if (stcb->asoc.tsn_out_wrapped) {
for (i = stcb->asoc.tsn_out_at; i < SCTP_TSN_LOG_SIZE; i++) {
SCTP_PRINTF("TSN:%x strm:%d seq:%d flags:%x sz:%d\n",
stcb->asoc.out_tsnlog[i].tsn,
stcb->asoc.out_tsnlog[i].strm,
stcb->asoc.out_tsnlog[i].seq,
stcb->asoc.out_tsnlog[i].flgs,
stcb->asoc.out_tsnlog[i].sz);
}
}
if (stcb->asoc.tsn_out_at) {
for (i = 0; i < stcb->asoc.tsn_out_at; i++) {
SCTP_PRINTF("TSN:%x strm:%d seq:%d flags:%x sz:%d\n",
stcb->asoc.out_tsnlog[i].tsn,
stcb->asoc.out_tsnlog[i].strm,
stcb->asoc.out_tsnlog[i].seq,
stcb->asoc.out_tsnlog[i].flgs,
stcb->asoc.out_tsnlog[i].sz);
}
}
#endif
}
#endif
void
sctp_abort_an_association(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
struct mbuf *op_err,
int so_locked)
{
#if defined(__APPLE__) && !defined(__Userspace__)
struct socket *so;
#endif
#if defined(__APPLE__) && !defined(__Userspace__)
so = SCTP_INP_SO(inp);
#endif
#if defined(__APPLE__) && !defined(__Userspace__)
if (so_locked) {
sctp_lock_assert(SCTP_INP_SO(inp));
} else {
sctp_unlock_assert(SCTP_INP_SO(inp));
}
#endif
if (stcb == NULL) {
/* Got to have a TCB */
if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
if (LIST_EMPTY(&inp->sctp_asoc_list)) {
#if defined(__APPLE__) && !defined(__Userspace__)
if (!so_locked) {
SCTP_SOCKET_LOCK(so, 1);
}
#endif
sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT,
SCTP_CALLED_DIRECTLY_NOCMPSET);
#if defined(__APPLE__) && !defined(__Userspace__)
if (!so_locked) {
SCTP_SOCKET_UNLOCK(so, 1);
}
#endif
}
}
return;
} else {
SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_WAS_ABORTED);
}
/* notify the peer */
sctp_send_abort_tcb(stcb, op_err, so_locked);
SCTP_STAT_INCR_COUNTER32(sctps_aborted);
if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
(SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
SCTP_STAT_DECR_GAUGE32(sctps_currestab);
}
/* notify the ulp */
if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) {
sctp_abort_notification(stcb, 0, 0, NULL, so_locked);
}
/* now free the asoc */
#ifdef SCTP_ASOCLOG_OF_TSNS
sctp_print_out_track_log(stcb);
#endif
#if defined(__APPLE__) && !defined(__Userspace__)
if (!so_locked) {
atomic_add_int(&stcb->asoc.refcnt, 1);
SCTP_TCB_UNLOCK(stcb);
SCTP_SOCKET_LOCK(so, 1);
SCTP_TCB_LOCK(stcb);
atomic_subtract_int(&stcb->asoc.refcnt, 1);
}
#endif
(void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
SCTP_FROM_SCTPUTIL + SCTP_LOC_5);
#if defined(__APPLE__) && !defined(__Userspace__)
if (!so_locked) {
SCTP_SOCKET_UNLOCK(so, 1);
}
#endif
}
void
sctp_handle_ootb(struct mbuf *m, int iphlen, int offset,
struct sockaddr *src, struct sockaddr *dst,
struct sctphdr *sh, struct sctp_inpcb *inp,
struct mbuf *cause,
#if defined(__FreeBSD__) && !defined(__Userspace__)
uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
#endif
uint32_t vrf_id, uint16_t port)
{
struct sctp_chunkhdr *ch, chunk_buf;
unsigned int chk_length;
int contains_init_chunk;
SCTP_STAT_INCR_COUNTER32(sctps_outoftheblue);
/* Generate a TO address for future reference */
if (inp && (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
if (LIST_EMPTY(&inp->sctp_asoc_list)) {
#if defined(__APPLE__) && !defined(__Userspace__)
SCTP_SOCKET_LOCK(SCTP_INP_SO(inp), 1);
#endif
sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT,
SCTP_CALLED_DIRECTLY_NOCMPSET);
#if defined(__APPLE__) && !defined(__Userspace__)
SCTP_SOCKET_UNLOCK(SCTP_INP_SO(inp), 1);
#endif
}
}
contains_init_chunk = 0;
ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
sizeof(*ch), (uint8_t *) & chunk_buf);
while (ch != NULL) {
chk_length = ntohs(ch->chunk_length);
if (chk_length < sizeof(*ch)) {
/* break to abort land */
break;
}
switch (ch->chunk_type) {
case SCTP_INIT:
contains_init_chunk = 1;
break;
case SCTP_PACKET_DROPPED:
/* we don't respond to pkt-dropped */
return;
case SCTP_ABORT_ASSOCIATION:
/* we don't respond with an ABORT to an ABORT */
return;
case SCTP_SHUTDOWN_COMPLETE:
/*
* we ignore it since we are not waiting for it and
* peer is gone
*/
return;
case SCTP_SHUTDOWN_ACK:
sctp_send_shutdown_complete2(src, dst, sh,
#if defined(__FreeBSD__) && !defined(__Userspace__)
mflowtype, mflowid, fibnum,
#endif
vrf_id, port);
return;
default:
break;
}
offset += SCTP_SIZE32(chk_length);
ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
sizeof(*ch), (uint8_t *) & chunk_buf);
}
if ((SCTP_BASE_SYSCTL(sctp_blackhole) == 0) ||
((SCTP_BASE_SYSCTL(sctp_blackhole) == 1) &&
(contains_init_chunk == 0))) {
sctp_send_abort(m, iphlen, src, dst, sh, 0, cause,
#if defined(__FreeBSD__) && !defined(__Userspace__)
mflowtype, mflowid, fibnum,
#endif
vrf_id, port);
}
}
/*
* check the inbound datagram to make sure there is not an abort inside it,
* if there is return 1, else return 0.
*/
int
sctp_is_there_an_abort_here(struct mbuf *m, int iphlen, uint32_t * vtagfill)
{
struct sctp_chunkhdr *ch;
struct sctp_init_chunk *init_chk, chunk_buf;
int offset;
unsigned int chk_length;
offset = iphlen + sizeof(struct sctphdr);
ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset, sizeof(*ch),
(uint8_t *) & chunk_buf);
while (ch != NULL) {
chk_length = ntohs(ch->chunk_length);
if (chk_length < sizeof(*ch)) {
/* packet is probably corrupt */
break;
}
/* we seem to be ok, is it an abort? */
if (ch->chunk_type == SCTP_ABORT_ASSOCIATION) {
/* yep, tell them */
return (1);
}
if (ch->chunk_type == SCTP_INITIATION) {
/* need to update the Vtag */
init_chk = (struct sctp_init_chunk *)sctp_m_getptr(m,
offset, sizeof(*init_chk), (uint8_t *) & chunk_buf);
if (init_chk != NULL) {
*vtagfill = ntohl(init_chk->init.initiate_tag);
}
}
/* Nope, move to the next chunk */
offset += SCTP_SIZE32(chk_length);
ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
sizeof(*ch), (uint8_t *) & chunk_buf);
}
return (0);
}
/*
* currently (2/02), ifa_addr embeds scope_id's and don't have sin6_scope_id
* set (i.e. it's 0) so, create this function to compare link local scopes
*/
#ifdef INET6
uint32_t
sctp_is_same_scope(struct sockaddr_in6 *addr1, struct sockaddr_in6 *addr2)
{
#if defined(__Userspace__)
/*__Userspace__ Returning 1 here always */
#endif
#if defined(SCTP_EMBEDDED_V6_SCOPE)
struct sockaddr_in6 a, b;
/* save copies */
a = *addr1;
b = *addr2;
if (a.sin6_scope_id == 0)
#ifdef SCTP_KAME
if (sa6_recoverscope(&a)) {
#else
if (in6_recoverscope(&a, &a.sin6_addr, NULL)) {
#endif /* SCTP_KAME */
/* can't get scope, so can't match */
return (0);
}
if (b.sin6_scope_id == 0)
#ifdef SCTP_KAME
if (sa6_recoverscope(&b)) {
#else
if (in6_recoverscope(&b, &b.sin6_addr, NULL)) {
#endif /* SCTP_KAME */
/* can't get scope, so can't match */
return (0);
}
if (a.sin6_scope_id != b.sin6_scope_id)
return (0);
#else
if (addr1->sin6_scope_id != addr2->sin6_scope_id)
return (0);
#endif /* SCTP_EMBEDDED_V6_SCOPE */
return (1);
}
#if defined(SCTP_EMBEDDED_V6_SCOPE)
/*
* returns a sockaddr_in6 with embedded scope recovered and removed
*/
struct sockaddr_in6 *
sctp_recover_scope(struct sockaddr_in6 *addr, struct sockaddr_in6 *store)
{
/* check and strip embedded scope junk */
if (addr->sin6_family == AF_INET6) {
if (IN6_IS_SCOPE_LINKLOCAL(&addr->sin6_addr)) {
if (addr->sin6_scope_id == 0) {
*store = *addr;
#ifdef SCTP_KAME
if (!sa6_recoverscope(store)) {
#else
if (!in6_recoverscope(store, &store->sin6_addr,
NULL)) {
#endif /* SCTP_KAME */
/* use the recovered scope */
addr = store;
}
} else {
/* else, return the original "to" addr */
in6_clearscope(&addr->sin6_addr);
}
}
}
return (addr);
}
#endif /* SCTP_EMBEDDED_V6_SCOPE */
#endif
/*
* are the two addresses the same? currently a "scopeless" check returns: 1
* if same, 0 if not
*/
int
sctp_cmpaddr(struct sockaddr *sa1, struct sockaddr *sa2)
{
/* must be valid */
if (sa1 == NULL || sa2 == NULL)
return (0);
/* must be the same family */
if (sa1->sa_family != sa2->sa_family)
return (0);
switch (sa1->sa_family) {
#ifdef INET6
case AF_INET6:
{
/* IPv6 addresses */
struct sockaddr_in6 *sin6_1, *sin6_2;
sin6_1 = (struct sockaddr_in6 *)sa1;
sin6_2 = (struct sockaddr_in6 *)sa2;
return (SCTP6_ARE_ADDR_EQUAL(sin6_1,
sin6_2));
}
#endif
#ifdef INET
case AF_INET:
{
/* IPv4 addresses */
struct sockaddr_in *sin_1, *sin_2;
sin_1 = (struct sockaddr_in *)sa1;
sin_2 = (struct sockaddr_in *)sa2;
return (sin_1->sin_addr.s_addr == sin_2->sin_addr.s_addr);
}
#endif
#if defined(__Userspace__)
case AF_CONN:
{
struct sockaddr_conn *sconn_1, *sconn_2;
sconn_1 = (struct sockaddr_conn *)sa1;
sconn_2 = (struct sockaddr_conn *)sa2;
return (sconn_1->sconn_addr == sconn_2->sconn_addr);
}
#endif
default:
/* we don't do these... */
return (0);
}
}
void
sctp_print_address(struct sockaddr *sa)
{
#ifdef INET6
#if defined(__FreeBSD__) && !defined(__Userspace__)
char ip6buf[INET6_ADDRSTRLEN];
#endif
#endif
switch (sa->sa_family) {
#ifdef INET6
case AF_INET6:
{
struct sockaddr_in6 *sin6;
sin6 = (struct sockaddr_in6 *)sa;
#if defined(__Userspace__)
SCTP_PRINTF("IPv6 address: %x:%x:%x:%x:%x:%x:%x:%x:port:%d scope:%u\n",
ntohs(sin6->sin6_addr.s6_addr16[0]),
ntohs(sin6->sin6_addr.s6_addr16[1]),
ntohs(sin6->sin6_addr.s6_addr16[2]),
ntohs(sin6->sin6_addr.s6_addr16[3]),
ntohs(sin6->sin6_addr.s6_addr16[4]),
ntohs(sin6->sin6_addr.s6_addr16[5]),
ntohs(sin6->sin6_addr.s6_addr16[6]),
ntohs(sin6->sin6_addr.s6_addr16[7]),
ntohs(sin6->sin6_port),
sin6->sin6_scope_id);
#else
#if defined(__FreeBSD__) && !defined(__Userspace__)
SCTP_PRINTF("IPv6 address: %s:port:%d scope:%u\n",
ip6_sprintf(ip6buf, &sin6->sin6_addr),
ntohs(sin6->sin6_port),
sin6->sin6_scope_id);
#else
SCTP_PRINTF("IPv6 address: %s:port:%d scope:%u\n",
ip6_sprintf(&sin6->sin6_addr),
ntohs(sin6->sin6_port),
sin6->sin6_scope_id);
#endif
#endif
break;
}
#endif
#ifdef INET
case AF_INET:
{
struct sockaddr_in *sin;
unsigned char *p;
sin = (struct sockaddr_in *)sa;
p = (unsigned char *)&sin->sin_addr;
SCTP_PRINTF("IPv4 address: %u.%u.%u.%u:%d\n",
p[0], p[1], p[2], p[3], ntohs(sin->sin_port));
break;
}
#endif
#if defined(__Userspace__)
case AF_CONN:
{
struct sockaddr_conn *sconn;
sconn = (struct sockaddr_conn *)sa;
SCTP_PRINTF("AF_CONN address: %p\n", sconn->sconn_addr);
break;
}
#endif
default:
SCTP_PRINTF("?\n");
break;
}
}
void
sctp_pull_off_control_to_new_inp(struct sctp_inpcb *old_inp,
struct sctp_inpcb *new_inp,
struct sctp_tcb *stcb,
int waitflags)
{
/*
* go through our old INP and pull off any control structures that
* belong to stcb and move then to the new inp.
*/
struct socket *old_so, *new_so;
struct sctp_queued_to_read *control, *nctl;
struct sctp_readhead tmp_queue;
struct mbuf *m;
#if (defined(__FreeBSD__) || defined(__APPLE__)) && !defined(__Userspace__)
int error = 0;
#endif
old_so = old_inp->sctp_socket;
new_so = new_inp->sctp_socket;
TAILQ_INIT(&tmp_queue);
#if (defined(__FreeBSD__) || defined(__APPLE__)) && !defined(__Userspace__)
error = sblock(&old_so->so_rcv, waitflags);
if (error) {
/* Gak, can't get sblock, we have a problem.
* data will be left stranded.. and we
* don't dare look at it since the
* other thread may be reading something.
* Oh well, its a screwed up app that does
* a peeloff OR a accept while reading
* from the main socket... actually its
* only the peeloff() case, since I think
* read will fail on a listening socket..
*/
return;
}
#endif
/* lock the socket buffers */
SCTP_INP_READ_LOCK(old_inp);
TAILQ_FOREACH_SAFE(control, &old_inp->read_queue, next, nctl) {
/* Pull off all for out target stcb */
if (control->stcb == stcb) {
/* remove it we want it */
TAILQ_REMOVE(&old_inp->read_queue, control, next);
TAILQ_INSERT_TAIL(&tmp_queue, control, next);
m = control->data;
while (m) {
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
sctp_sblog(&old_so->so_rcv, control->do_not_ref_stcb?NULL:stcb, SCTP_LOG_SBFREE,SCTP_BUF_LEN(m));
}
sctp_sbfree(control, stcb, &old_so->so_rcv, m);
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
sctp_sblog(&old_so->so_rcv, control->do_not_ref_stcb?NULL:stcb, SCTP_LOG_SBRESULT, 0);
}
m = SCTP_BUF_NEXT(m);
}
}
}
SCTP_INP_READ_UNLOCK(old_inp);
/* Remove the sb-lock on the old socket */
#if defined(__APPLE__) && !defined(__Userspace__)
sbunlock(&old_so->so_rcv, 1);
#endif
#if defined(__FreeBSD__) && !defined(__Userspace__)
sbunlock(&old_so->so_rcv);
#endif
/* Now we move them over to the new socket buffer */
SCTP_INP_READ_LOCK(new_inp);
TAILQ_FOREACH_SAFE(control, &tmp_queue, next, nctl) {
TAILQ_INSERT_TAIL(&new_inp->read_queue, control, next);
m = control->data;
while (m) {
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
sctp_sblog(&new_so->so_rcv, control->do_not_ref_stcb?NULL:stcb, SCTP_LOG_SBALLOC, SCTP_BUF_LEN(m));
}
sctp_sballoc(stcb, &new_so->so_rcv, m);
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
sctp_sblog(&new_so->so_rcv, control->do_not_ref_stcb?NULL:stcb, SCTP_LOG_SBRESULT, 0);
}
m = SCTP_BUF_NEXT(m);
}
}
SCTP_INP_READ_UNLOCK(new_inp);
}
void
sctp_wakeup_the_read_socket(struct sctp_inpcb *inp,
struct sctp_tcb *stcb,
int so_locked
#if !(defined(__APPLE__) && !defined(__Userspace__))
SCTP_UNUSED
#endif
)
{
if ((inp != NULL) && (inp->sctp_socket != NULL)) {
#if defined(__APPLE__) && !defined(__Userspace__)
struct socket *so;
so = SCTP_INP_SO(inp);
if (!so_locked) {
if (stcb) {
atomic_add_int(&stcb->asoc.refcnt, 1);
SCTP_TCB_UNLOCK(stcb);
}
SCTP_SOCKET_LOCK(so, 1);
if (stcb) {
SCTP_TCB_LOCK(stcb);
atomic_subtract_int(&stcb->asoc.refcnt, 1);
}
if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
SCTP_SOCKET_UNLOCK(so, 1);
return;
}
}
#endif
sctp_sorwakeup(inp, inp->sctp_socket);
#if defined(__APPLE__) && !defined(__Userspace__)
if (!so_locked) {
SCTP_SOCKET_UNLOCK(so, 1);
}
#endif
}
}
#if defined(__Userspace__)
void
sctp_invoke_recv_callback(struct sctp_inpcb *inp,
struct sctp_tcb *stcb,
struct sctp_queued_to_read *control,
int inp_read_lock_held)
{
uint32_t pd_point, length;
if ((inp->recv_callback == NULL) ||
(stcb == NULL) ||
(stcb->sctp_socket == NULL)) {
return;
}
length = control->length;
if (stcb != NULL && stcb->sctp_socket != NULL) {
pd_point = min(SCTP_SB_LIMIT_RCV(stcb->sctp_socket) >> SCTP_PARTIAL_DELIVERY_SHIFT,
stcb->sctp_ep->partial_delivery_point);
} else {
pd_point = inp->partial_delivery_point;
}
if ((control->end_added == 1) || (length >= pd_point)) {
struct socket *so;
struct mbuf *m;
char *buffer;
struct sctp_rcvinfo rcv;
union sctp_sockstore addr;
int flags;
if ((buffer = malloc(length)) == NULL) {
return;
}
if (inp_read_lock_held == 0) {
SCTP_INP_READ_LOCK(inp);
}
so = stcb->sctp_socket;
for (m = control->data; m; m = SCTP_BUF_NEXT(m)) {
sctp_sbfree(control, control->stcb, &so->so_rcv, m);
}
m_copydata(control->data, 0, length, buffer);
memset(&rcv, 0, sizeof(struct sctp_rcvinfo));
rcv.rcv_sid = control->sinfo_stream;
rcv.rcv_ssn = (uint16_t)control->mid;
rcv.rcv_flags = control->sinfo_flags;
rcv.rcv_ppid = control->sinfo_ppid;
rcv.rcv_tsn = control->sinfo_tsn;
rcv.rcv_cumtsn = control->sinfo_cumtsn;
rcv.rcv_context = control->sinfo_context;
rcv.rcv_assoc_id = control->sinfo_assoc_id;
memset(&addr, 0, sizeof(union sctp_sockstore));
switch (control->whoFrom->ro._l_addr.sa.sa_family) {
#ifdef INET
case AF_INET:
addr.sin = control->whoFrom->ro._l_addr.sin;
break;
#endif
#ifdef INET6
case AF_INET6:
addr.sin6 = control->whoFrom->ro._l_addr.sin6;
break;
#endif
case AF_CONN:
addr.sconn = control->whoFrom->ro._l_addr.sconn;
break;
default:
addr.sa = control->whoFrom->ro._l_addr.sa;
break;
}
flags = 0;
if (control->end_added == 1) {
flags |= MSG_EOR;
}
if (control->spec_flags & M_NOTIFICATION) {
flags |= MSG_NOTIFICATION;
}
sctp_m_freem(control->data);
control->data = NULL;
control->tail_mbuf = NULL;
control->length = 0;
if (control->end_added) {
TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next);
control->on_read_q = 0;
sctp_free_remote_addr(control->whoFrom);
control->whoFrom = NULL;
sctp_free_a_readq(stcb, control);
}
atomic_add_int(&stcb->asoc.refcnt, 1);
SCTP_TCB_UNLOCK(stcb);
if (inp_read_lock_held == 0) {
SCTP_INP_READ_UNLOCK(inp);
}
inp->recv_callback(so, addr, buffer, length, rcv, flags, inp->ulp_info);
SCTP_TCB_LOCK(stcb);
atomic_subtract_int(&stcb->asoc.refcnt, 1);
}
}
#endif
void
sctp_add_to_readq(struct sctp_inpcb *inp,
struct sctp_tcb *stcb,
struct sctp_queued_to_read *control,
struct sockbuf *sb,
int end,
int inp_read_lock_held,
int so_locked)
{
/*
* Here we must place the control on the end of the socket read
* queue AND increment sb_cc so that select will work properly on
* read.
*/
struct mbuf *m, *prev = NULL;
if (inp == NULL) {
/* Gak, TSNH!! */
#ifdef INVARIANTS
panic("Gak, inp NULL on add_to_readq");
#endif
return;
}
#if defined(__APPLE__) && !defined(__Userspace__)
if (so_locked) {
sctp_lock_assert(SCTP_INP_SO(inp));
} else {
sctp_unlock_assert(SCTP_INP_SO(inp));
}
#endif
if (inp_read_lock_held == 0)
SCTP_INP_READ_LOCK(inp);
if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_CANT_READ) {
if (!control->on_strm_q) {
sctp_free_remote_addr(control->whoFrom);
if (control->data) {
sctp_m_freem(control->data);
control->data = NULL;
}
sctp_free_a_readq(stcb, control);
}
if (inp_read_lock_held == 0)
SCTP_INP_READ_UNLOCK(inp);
return;
}
if (!(control->spec_flags & M_NOTIFICATION)) {
atomic_add_int(&inp->total_recvs, 1);
if (!control->do_not_ref_stcb) {
atomic_add_int(&stcb->total_recvs, 1);
}
}
m = control->data;
control->held_length = 0;
control->length = 0;
while (m) {
if (SCTP_BUF_LEN(m) == 0) {
/* Skip mbufs with NO length */
if (prev == NULL) {
/* First one */
control->data = sctp_m_free(m);
m = control->data;
} else {
SCTP_BUF_NEXT(prev) = sctp_m_free(m);
m = SCTP_BUF_NEXT(prev);
}
if (m == NULL) {
control->tail_mbuf = prev;
}
continue;
}
prev = m;
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
sctp_sblog(sb, control->do_not_ref_stcb?NULL:stcb, SCTP_LOG_SBALLOC, SCTP_BUF_LEN(m));
}
sctp_sballoc(stcb, sb, m);
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
sctp_sblog(sb, control->do_not_ref_stcb?NULL:stcb, SCTP_LOG_SBRESULT, 0);
}
atomic_add_int(&control->length, SCTP_BUF_LEN(m));
m = SCTP_BUF_NEXT(m);
}
if (prev != NULL) {
control->tail_mbuf = prev;
} else {
/* Everything got collapsed out?? */
if (!control->on_strm_q) {
sctp_free_remote_addr(control->whoFrom);
sctp_free_a_readq(stcb, control);
}
if (inp_read_lock_held == 0)
SCTP_INP_READ_UNLOCK(inp);
return;
}
if (end) {
control->end_added = 1;
}
TAILQ_INSERT_TAIL(&inp->read_queue, control, next);
control->on_read_q = 1;
if (inp_read_lock_held == 0)
SCTP_INP_READ_UNLOCK(inp);
#if defined(__Userspace__)
sctp_invoke_recv_callback(inp, stcb, control, inp_read_lock_held);
#endif
if (inp && inp->sctp_socket) {
sctp_wakeup_the_read_socket(inp, stcb, so_locked);
}
}
/*************HOLD THIS COMMENT FOR PATCH FILE OF
*************ALTERNATE ROUTING CODE
*/
/*************HOLD THIS COMMENT FOR END OF PATCH FILE OF
*************ALTERNATE ROUTING CODE
*/
struct mbuf *
sctp_generate_cause(uint16_t code, char *info)
{
struct mbuf *m;
struct sctp_gen_error_cause *cause;
size_t info_len;
uint16_t len;
if ((code == 0) || (info == NULL)) {
return (NULL);
}
info_len = strlen(info);
if (info_len > (SCTP_MAX_CAUSE_LENGTH - sizeof(struct sctp_paramhdr))) {
return (NULL);
}
len = (uint16_t)(sizeof(struct sctp_paramhdr) + info_len);
m = sctp_get_mbuf_for_msg(len, 0, M_NOWAIT, 1, MT_DATA);
if (m != NULL) {
SCTP_BUF_LEN(m) = len;
cause = mtod(m, struct sctp_gen_error_cause *);
cause->code = htons(code);
cause->length = htons(len);
memcpy(cause->info, info, info_len);
}
return (m);
}
struct mbuf *
sctp_generate_no_user_data_cause(uint32_t tsn)
{
struct mbuf *m;
struct sctp_error_no_user_data *no_user_data_cause;
uint16_t len;
len = (uint16_t)sizeof(struct sctp_error_no_user_data);
m = sctp_get_mbuf_for_msg(len, 0, M_NOWAIT, 1, MT_DATA);
if (m != NULL) {
SCTP_BUF_LEN(m) = len;
no_user_data_cause = mtod(m, struct sctp_error_no_user_data *);
no_user_data_cause->cause.code = htons(SCTP_CAUSE_NO_USER_DATA);
no_user_data_cause->cause.length = htons(len);
no_user_data_cause->tsn = htonl(tsn);
}
return (m);
}
#ifdef SCTP_MBCNT_LOGGING
void
sctp_free_bufspace(struct sctp_tcb *stcb, struct sctp_association *asoc,
struct sctp_tmit_chunk *tp1, int chk_cnt)
{
if (tp1->data == NULL) {
return;
}
asoc->chunks_on_out_queue -= chk_cnt;
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBCNT_LOGGING_ENABLE) {
sctp_log_mbcnt(SCTP_LOG_MBCNT_DECREASE,
asoc->total_output_queue_size,
tp1->book_size,
0,
tp1->mbcnt);
}
if (asoc->total_output_queue_size >= tp1->book_size) {
atomic_add_int(&asoc->total_output_queue_size, -tp1->book_size);
} else {
asoc->total_output_queue_size = 0;
}
if (stcb->sctp_socket && (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) ||
((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)))) {
if (stcb->sctp_socket->so_snd.sb_cc >= tp1->book_size) {
stcb->sctp_socket->so_snd.sb_cc -= tp1->book_size;
} else {
stcb->sctp_socket->so_snd.sb_cc = 0;
}
}
}
#endif
int
sctp_release_pr_sctp_chunk(struct sctp_tcb *stcb, struct sctp_tmit_chunk *tp1,
uint8_t sent, int so_locked)
{
struct sctp_stream_out *strq;
struct sctp_tmit_chunk *chk = NULL, *tp2;
struct sctp_stream_queue_pending *sp;
uint32_t mid;
uint16_t sid;
uint8_t foundeom = 0;
int ret_sz = 0;
int notdone;
int do_wakeup_routine = 0;
#if defined(__APPLE__) && !defined(__Userspace__)
if (so_locked) {
sctp_lock_assert(SCTP_INP_SO(stcb->sctp_ep));
} else {
sctp_unlock_assert(SCTP_INP_SO(stcb->sctp_ep));
}
#endif
sid = tp1->rec.data.sid;
mid = tp1->rec.data.mid;
if (sent || !(tp1->rec.data.rcv_flags & SCTP_DATA_FIRST_FRAG)) {
stcb->asoc.abandoned_sent[0]++;
stcb->asoc.abandoned_sent[PR_SCTP_POLICY(tp1->flags)]++;
stcb->asoc.strmout[sid].abandoned_sent[0]++;
#if defined(SCTP_DETAILED_STR_STATS)
stcb->asoc.strmout[sid].abandoned_sent[PR_SCTP_POLICY(tp1->flags)]++;
#endif
} else {
stcb->asoc.abandoned_unsent[0]++;
stcb->asoc.abandoned_unsent[PR_SCTP_POLICY(tp1->flags)]++;
stcb->asoc.strmout[sid].abandoned_unsent[0]++;
#if defined(SCTP_DETAILED_STR_STATS)
stcb->asoc.strmout[sid].abandoned_unsent[PR_SCTP_POLICY(tp1->flags)]++;
#endif
}
do {
ret_sz += tp1->book_size;
if (tp1->data != NULL) {
if (tp1->sent < SCTP_DATAGRAM_RESEND) {
sctp_flight_size_decrease(tp1);
sctp_total_flight_decrease(stcb, tp1);
}
sctp_free_bufspace(stcb, &stcb->asoc, tp1, 1);
stcb->asoc.peers_rwnd += tp1->send_size;
stcb->asoc.peers_rwnd += SCTP_BASE_SYSCTL(sctp_peer_chunk_oh);
if (sent) {
sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb, 0, tp1, so_locked);
} else {
sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb, 0, tp1, so_locked);
}
if (tp1->data) {
sctp_m_freem(tp1->data);
tp1->data = NULL;
}
do_wakeup_routine = 1;
if (PR_SCTP_BUF_ENABLED(tp1->flags)) {
stcb->asoc.sent_queue_cnt_removeable--;
}
}
tp1->sent = SCTP_FORWARD_TSN_SKIP;
if ((tp1->rec.data.rcv_flags & SCTP_DATA_NOT_FRAG) ==
SCTP_DATA_NOT_FRAG) {
/* not frag'ed we ae done */
notdone = 0;
foundeom = 1;
} else if (tp1->rec.data.rcv_flags & SCTP_DATA_LAST_FRAG) {
/* end of frag, we are done */
notdone = 0;
foundeom = 1;
} else {
/*
* Its a begin or middle piece, we must mark all of
* it
*/
notdone = 1;
tp1 = TAILQ_NEXT(tp1, sctp_next);
}
} while (tp1 && notdone);
if (foundeom == 0) {
/*
* The multi-part message was scattered across the send and
* sent queue.
*/
TAILQ_FOREACH_SAFE(tp1, &stcb->asoc.send_queue, sctp_next, tp2) {
if ((tp1->rec.data.sid != sid) ||
(!SCTP_MID_EQ(stcb->asoc.idata_supported, tp1->rec.data.mid, mid))) {
break;
}
/* save to chk in case we have some on stream out
* queue. If so and we have an un-transmitted one
* we don't have to fudge the TSN.
*/
chk = tp1;
ret_sz += tp1->book_size;
sctp_free_bufspace(stcb, &stcb->asoc, tp1, 1);
if (sent) {
sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb, 0, tp1, so_locked);
} else {
sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb, 0, tp1, so_locked);
}
if (tp1->data) {
sctp_m_freem(tp1->data);
tp1->data = NULL;
}
/* No flight involved here book the size to 0 */
tp1->book_size = 0;
if (tp1->rec.data.rcv_flags & SCTP_DATA_LAST_FRAG) {
foundeom = 1;
}
do_wakeup_routine = 1;
tp1->sent = SCTP_FORWARD_TSN_SKIP;
TAILQ_REMOVE(&stcb->asoc.send_queue, tp1, sctp_next);
/* on to the sent queue so we can wait for it to be passed by. */
TAILQ_INSERT_TAIL(&stcb->asoc.sent_queue, tp1,
sctp_next);
stcb->asoc.send_queue_cnt--;
stcb->asoc.sent_queue_cnt++;
}
}
if (foundeom == 0) {
/*
* Still no eom found. That means there
* is stuff left on the stream out queue.. yuck.
*/
SCTP_TCB_SEND_LOCK(stcb);
strq = &stcb->asoc.strmout[sid];
sp = TAILQ_FIRST(&strq->outqueue);
if (sp != NULL) {
sp->discard_rest = 1;
/*
* We may need to put a chunk on the
* queue that holds the TSN that
* would have been sent with the LAST
* bit.
*/
if (chk == NULL) {
/* Yep, we have to */
sctp_alloc_a_chunk(stcb, chk);
if (chk == NULL) {
/* we are hosed. All we can
* do is nothing.. which will
* cause an abort if the peer is
* paying attention.
*/
goto oh_well;
}
memset(chk, 0, sizeof(*chk));
chk->rec.data.rcv_flags = 0;
chk->sent = SCTP_FORWARD_TSN_SKIP;
chk->asoc = &stcb->asoc;
if (stcb->asoc.idata_supported == 0) {
if (sp->sinfo_flags & SCTP_UNORDERED) {
chk->rec.data.mid = 0;
} else {
chk->rec.data.mid = strq->next_mid_ordered;
}
} else {
if (sp->sinfo_flags & SCTP_UNORDERED) {
chk->rec.data.mid = strq->next_mid_unordered;
} else {
chk->rec.data.mid = strq->next_mid_ordered;
}
}
chk->rec.data.sid = sp->sid;
chk->rec.data.ppid = sp->ppid;
chk->rec.data.context = sp->context;
chk->flags = sp->act_flags;
chk->whoTo = NULL;
#if defined(__FreeBSD__) && !defined(__Userspace__)
chk->rec.data.tsn = atomic_fetchadd_int(&stcb->asoc.sending_seq, 1);
#else
chk->rec.data.tsn = stcb->asoc.sending_seq++;
#endif
strq->chunks_on_queues++;
TAILQ_INSERT_TAIL(&stcb->asoc.sent_queue, chk, sctp_next);
stcb->asoc.sent_queue_cnt++;
stcb->asoc.pr_sctp_cnt++;
}
chk->rec.data.rcv_flags |= SCTP_DATA_LAST_FRAG;
if (sp->sinfo_flags & SCTP_UNORDERED) {
chk->rec.data.rcv_flags |= SCTP_DATA_UNORDERED;
}
if (stcb->asoc.idata_supported == 0) {
if ((sp->sinfo_flags & SCTP_UNORDERED) == 0) {
strq->next_mid_ordered++;
}
} else {
if (sp->sinfo_flags & SCTP_UNORDERED) {
strq->next_mid_unordered++;
} else {
strq->next_mid_ordered++;
}
}
oh_well:
if (sp->data) {
/* Pull any data to free up the SB and
* allow sender to "add more" while we
* will throw away :-)
*/
sctp_free_spbufspace(stcb, &stcb->asoc, sp);
ret_sz += sp->length;
do_wakeup_routine = 1;
sp->some_taken = 1;
sctp_m_freem(sp->data);
sp->data = NULL;
sp->tail_mbuf = NULL;
sp->length = 0;
}
}
SCTP_TCB_SEND_UNLOCK(stcb);
}
if (do_wakeup_routine) {
#if defined(__APPLE__) && !defined(__Userspace__)
struct socket *so;
so = SCTP_INP_SO(stcb->sctp_ep);
if (!so_locked) {
atomic_add_int(&stcb->asoc.refcnt, 1);
SCTP_TCB_UNLOCK(stcb);
SCTP_SOCKET_LOCK(so, 1);
SCTP_TCB_LOCK(stcb);
atomic_subtract_int(&stcb->asoc.refcnt, 1);
if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
/* assoc was freed while we were unlocked */
SCTP_SOCKET_UNLOCK(so, 1);
return (ret_sz);
}
}
#endif
sctp_sowwakeup(stcb->sctp_ep, stcb->sctp_socket);
#if defined(__APPLE__) && !defined(__Userspace__)
if (!so_locked) {
SCTP_SOCKET_UNLOCK(so, 1);
}
#endif
}
return (ret_sz);
}
/*
* checks to see if the given address, sa, is one that is currently known by
* the kernel note: can't distinguish the same address on multiple interfaces
* and doesn't handle multiple addresses with different zone/scope id's note:
* ifa_ifwithaddr() compares the entire sockaddr struct
*/
struct sctp_ifa *
sctp_find_ifa_in_ep(struct sctp_inpcb *inp, struct sockaddr *addr,
int holds_lock)
{
struct sctp_laddr *laddr;
if (holds_lock == 0) {
SCTP_INP_RLOCK(inp);
}
LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
if (laddr->ifa == NULL)
continue;
if (addr->sa_family != laddr->ifa->address.sa.sa_family)
continue;
#ifdef INET
if (addr->sa_family == AF_INET) {
if (((struct sockaddr_in *)addr)->sin_addr.s_addr ==
laddr->ifa->address.sin.sin_addr.s_addr) {
/* found him. */
break;
}
}
#endif
#ifdef INET6
if (addr->sa_family == AF_INET6) {
if (SCTP6_ARE_ADDR_EQUAL((struct sockaddr_in6 *)addr,
&laddr->ifa->address.sin6)) {
/* found him. */
break;
}
}
#endif
#if defined(__Userspace__)
if (addr->sa_family == AF_CONN) {
if (((struct sockaddr_conn *)addr)->sconn_addr == laddr->ifa->address.sconn.sconn_addr) {
/* found him. */
break;
}
}
#endif
}
if (holds_lock == 0) {
SCTP_INP_RUNLOCK(inp);
}
if (laddr != NULL) {
return (laddr->ifa);
} else {
return (NULL);
}
}
uint32_t
sctp_get_ifa_hash_val(struct sockaddr *addr)
{
switch (addr->sa_family) {
#ifdef INET
case AF_INET:
{
struct sockaddr_in *sin;
sin = (struct sockaddr_in *)addr;
return (sin->sin_addr.s_addr ^ (sin->sin_addr.s_addr >> 16));
}
#endif
#ifdef INET6
case AF_INET6:
{
struct sockaddr_in6 *sin6;
uint32_t hash_of_addr;
sin6 = (struct sockaddr_in6 *)addr;
#if !defined(_WIN32) && !(defined(__FreeBSD__) && defined(__Userspace__)) && !defined(__APPLE__)
hash_of_addr = (sin6->sin6_addr.s6_addr32[0] +
sin6->sin6_addr.s6_addr32[1] +
sin6->sin6_addr.s6_addr32[2] +
sin6->sin6_addr.s6_addr32[3]);
#else
hash_of_addr = (((uint32_t *)&sin6->sin6_addr)[0] +
((uint32_t *)&sin6->sin6_addr)[1] +
((uint32_t *)&sin6->sin6_addr)[2] +
((uint32_t *)&sin6->sin6_addr)[3]);
#endif
hash_of_addr = (hash_of_addr ^ (hash_of_addr >> 16));
return (hash_of_addr);
}
#endif
#if defined(__Userspace__)
case AF_CONN:
{
struct sockaddr_conn *sconn;
uintptr_t temp;
sconn = (struct sockaddr_conn *)addr;
temp = (uintptr_t)sconn->sconn_addr;
return ((uint32_t)(temp ^ (temp >> 16)));
}
#endif
default:
break;
}
return (0);
}
struct sctp_ifa *
sctp_find_ifa_by_addr(struct sockaddr *addr, uint32_t vrf_id, int holds_lock)
{
struct sctp_ifa *sctp_ifap;
struct sctp_vrf *vrf;
struct sctp_ifalist *hash_head;
uint32_t hash_of_addr;
if (holds_lock == 0) {
SCTP_IPI_ADDR_RLOCK();
} else {
SCTP_IPI_ADDR_LOCK_ASSERT();
}
vrf = sctp_find_vrf(vrf_id);
if (vrf == NULL) {
if (holds_lock == 0)
SCTP_IPI_ADDR_RUNLOCK();
return (NULL);
}
hash_of_addr = sctp_get_ifa_hash_val(addr);
hash_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)];
if (hash_head == NULL) {
SCTP_PRINTF("hash_of_addr:%x mask:%x table:%x - ",
hash_of_addr, (uint32_t)vrf->vrf_addr_hashmark,
(uint32_t)(hash_of_addr & vrf->vrf_addr_hashmark));
sctp_print_address(addr);
SCTP_PRINTF("No such bucket for address\n");
if (holds_lock == 0)
SCTP_IPI_ADDR_RUNLOCK();
return (NULL);
}
LIST_FOREACH(sctp_ifap, hash_head, next_bucket) {
if (addr->sa_family != sctp_ifap->address.sa.sa_family)
continue;
#ifdef INET
if (addr->sa_family == AF_INET) {
if (((struct sockaddr_in *)addr)->sin_addr.s_addr ==
sctp_ifap->address.sin.sin_addr.s_addr) {
/* found him. */
break;
}
}
#endif
#ifdef INET6
if (addr->sa_family == AF_INET6) {
if (SCTP6_ARE_ADDR_EQUAL((struct sockaddr_in6 *)addr,
&sctp_ifap->address.sin6)) {
/* found him. */
break;
}
}
#endif
#if defined(__Userspace__)
if (addr->sa_family == AF_CONN) {
if (((struct sockaddr_conn *)addr)->sconn_addr == sctp_ifap->address.sconn.sconn_addr) {
/* found him. */
break;
}
}
#endif
}
if (holds_lock == 0)
SCTP_IPI_ADDR_RUNLOCK();
return (sctp_ifap);
}
static void
sctp_user_rcvd(struct sctp_tcb *stcb, uint32_t *freed_so_far, int hold_rlock,
uint32_t rwnd_req)
{
/* User pulled some data, do we need a rwnd update? */
#if defined(__FreeBSD__) && !defined(__Userspace__)
struct epoch_tracker et;
#endif
int r_unlocked = 0;
uint32_t dif, rwnd;
struct socket *so = NULL;
if (stcb == NULL)
return;
atomic_add_int(&stcb->asoc.refcnt, 1);
if ((SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
(stcb->asoc.state & (SCTP_STATE_ABOUT_TO_BE_FREED | SCTP_STATE_SHUTDOWN_RECEIVED))) {
/* Pre-check If we are freeing no update */
goto no_lock;
}
SCTP_INP_INCR_REF(stcb->sctp_ep);
if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
(stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
goto out;
}
so = stcb->sctp_socket;
if (so == NULL) {
goto out;
}
atomic_add_int(&stcb->freed_by_sorcv_sincelast, *freed_so_far);
/* Have you have freed enough to look */
*freed_so_far = 0;
/* Yep, its worth a look and the lock overhead */
/* Figure out what the rwnd would be */
rwnd = sctp_calc_rwnd(stcb, &stcb->asoc);
if (rwnd >= stcb->asoc.my_last_reported_rwnd) {
dif = rwnd - stcb->asoc.my_last_reported_rwnd;
} else {
dif = 0;
}
if (dif >= rwnd_req) {
if (hold_rlock) {
SCTP_INP_READ_UNLOCK(stcb->sctp_ep);
r_unlocked = 1;
}
if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
/*
* One last check before we allow the guy possibly
* to get in. There is a race, where the guy has not
* reached the gate. In that case
*/
goto out;
}
SCTP_TCB_LOCK(stcb);
if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
/* No reports here */
SCTP_TCB_UNLOCK(stcb);
goto out;
}
SCTP_STAT_INCR(sctps_wu_sacks_sent);
#if defined(__FreeBSD__) && !defined(__Userspace__)
NET_EPOCH_ENTER(et);
#endif
sctp_send_sack(stcb, SCTP_SO_LOCKED);
sctp_chunk_output(stcb->sctp_ep, stcb,
SCTP_OUTPUT_FROM_USR_RCVD, SCTP_SO_LOCKED);
/* make sure no timer is running */
#if defined(__FreeBSD__) && !defined(__Userspace__)
NET_EPOCH_EXIT(et);
#endif
sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, NULL,
SCTP_FROM_SCTPUTIL + SCTP_LOC_6);
SCTP_TCB_UNLOCK(stcb);
} else {
/* Update how much we have pending */
stcb->freed_by_sorcv_sincelast = dif;
}
out:
if (so && r_unlocked && hold_rlock) {
SCTP_INP_READ_LOCK(stcb->sctp_ep);
}
SCTP_INP_DECR_REF(stcb->sctp_ep);
no_lock:
atomic_add_int(&stcb->asoc.refcnt, -1);
return;
}
int
sctp_sorecvmsg(struct socket *so,
struct uio *uio,
struct mbuf **mp,
struct sockaddr *from,
int fromlen,
int *msg_flags,
struct sctp_sndrcvinfo *sinfo,
int filling_sinfo)
{
/*
* MSG flags we will look at MSG_DONTWAIT - non-blocking IO.
* MSG_PEEK - Look don't touch :-D (only valid with OUT mbuf copy
* mp=NULL thus uio is the copy method to userland) MSG_WAITALL - ??
* On the way out we may send out any combination of:
* MSG_NOTIFICATION MSG_EOR
*
*/
struct sctp_inpcb *inp = NULL;
ssize_t my_len = 0;
ssize_t cp_len = 0;
int error = 0;
struct sctp_queued_to_read *control = NULL, *ctl = NULL, *nxt = NULL;
struct mbuf *m = NULL;
struct sctp_tcb *stcb = NULL;
int wakeup_read_socket = 0;
int freecnt_applied = 0;
int out_flags = 0, in_flags = 0;
int block_allowed = 1;
uint32_t freed_so_far = 0;
ssize_t copied_so_far = 0;
int in_eeor_mode = 0;
int no_rcv_needed = 0;
uint32_t rwnd_req = 0;
int hold_sblock = 0;
int hold_rlock = 0;
ssize_t slen = 0;
uint32_t held_length = 0;
#if defined(__FreeBSD__) && !defined(__Userspace__)
int sockbuf_lock = 0;
#endif
if (uio == NULL) {
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
return (EINVAL);
}
if (msg_flags) {
in_flags = *msg_flags;
if (in_flags & MSG_PEEK)
SCTP_STAT_INCR(sctps_read_peeks);
} else {
in_flags = 0;
}
#if defined(__APPLE__) && !defined(__Userspace__)
#if defined(APPLE_LEOPARD)
slen = uio->uio_resid;
#else
slen = uio_resid(uio);
#endif
#else
slen = uio->uio_resid;
#endif
/* Pull in and set up our int flags */
if (in_flags & MSG_OOB) {
/* Out of band's NOT supported */
return (EOPNOTSUPP);
}
if ((in_flags & MSG_PEEK) && (mp != NULL)) {
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
return (EINVAL);
}
if ((in_flags & (MSG_DONTWAIT
#if defined(__FreeBSD__) && !defined(__Userspace__)
| MSG_NBIO
#endif
)) ||
SCTP_SO_IS_NBIO(so)) {
block_allowed = 0;
}
/* setup the endpoint */
inp = (struct sctp_inpcb *)so->so_pcb;
if (inp == NULL) {
SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTPUTIL, EFAULT);
return (EFAULT);
}
rwnd_req = (SCTP_SB_LIMIT_RCV(so) >> SCTP_RWND_HIWAT_SHIFT);
/* Must be at least a MTU's worth */
if (rwnd_req < SCTP_MIN_RWND)
rwnd_req = SCTP_MIN_RWND;
in_eeor_mode = sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR);
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_RECV_RWND_LOGGING_ENABLE) {
#if defined(__APPLE__) && !defined(__Userspace__)
#if defined(APPLE_LEOPARD)
sctp_misc_ints(SCTP_SORECV_ENTER,
rwnd_req, in_eeor_mode, so->so_rcv.sb_cc, uio->uio_resid);
#else
sctp_misc_ints(SCTP_SORECV_ENTER,
rwnd_req, in_eeor_mode, so->so_rcv.sb_cc, uio_resid(uio));
#endif
#else
sctp_misc_ints(SCTP_SORECV_ENTER,
rwnd_req, in_eeor_mode, so->so_rcv.sb_cc, (uint32_t)uio->uio_resid);
#endif
}
#if defined(__Userspace__)
SOCKBUF_LOCK(&so->so_rcv);
hold_sblock = 1;
#endif
if (SCTP_BASE_SYSCTL(sctp_logging_level) &SCTP_RECV_RWND_LOGGING_ENABLE) {
#if defined(__APPLE__) && !defined(__Userspace__)
#if defined(APPLE_LEOPARD)
sctp_misc_ints(SCTP_SORECV_ENTERPL,
rwnd_req, block_allowed, so->so_rcv.sb_cc, uio->uio_resid);
#else
sctp_misc_ints(SCTP_SORECV_ENTERPL,
rwnd_req, block_allowed, so->so_rcv.sb_cc, uio_resid(uio));
#endif
#else
sctp_misc_ints(SCTP_SORECV_ENTERPL,
rwnd_req, block_allowed, so->so_rcv.sb_cc, (uint32_t)uio->uio_resid);
#endif
}
#if defined(__APPLE__) && !defined(__Userspace__)
error = sblock(&so->so_rcv, SBLOCKWAIT(in_flags));
#endif
#if defined(__FreeBSD__) && !defined(__Userspace__)
error = sblock(&so->so_rcv, (block_allowed ? SBL_WAIT : 0));
#endif
if (error) {
goto release_unlocked;
}
#if defined(__FreeBSD__) && !defined(__Userspace__)
sockbuf_lock = 1;
#endif
restart:
#if defined(__Userspace__)
if (hold_sblock == 0) {
SOCKBUF_LOCK(&so->so_rcv);
hold_sblock = 1;
}
#endif
#if defined(__APPLE__) && !defined(__Userspace__)
sbunlock(&so->so_rcv, 1);
#endif
restart_nosblocks:
if (hold_sblock == 0) {
SOCKBUF_LOCK(&so->so_rcv);
hold_sblock = 1;
}
if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
(inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
goto out;
}
#if (defined(__FreeBSD__) || defined(_WIN32)) && !defined(__Userspace__)
if ((so->so_rcv.sb_state & SBS_CANTRCVMORE) && (so->so_rcv.sb_cc == 0)) {
#else
if ((so->so_state & SS_CANTRCVMORE) && (so->so_rcv.sb_cc == 0)) {
#endif
if (so->so_error) {
error = so->so_error;
if ((in_flags & MSG_PEEK) == 0)
so->so_error = 0;
goto out;
} else {
if (so->so_rcv.sb_cc == 0) {
/* indicate EOF */
error = 0;
goto out;
}
}
}
if (so->so_rcv.sb_cc <= held_length) {
if (so->so_error) {
error = so->so_error;
if ((in_flags & MSG_PEEK) == 0) {
so->so_error = 0;
}
goto out;
}
if ((so->so_rcv.sb_cc == 0) &&
((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
(inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) {
if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0) {
/* For active open side clear flags for re-use
* passive open is blocked by connect.
*/
if (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED) {
/* You were aborted, passive side always hits here */
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, ECONNRESET);
error = ECONNRESET;
}
so->so_state &= ~(SS_ISCONNECTING |
SS_ISDISCONNECTING |
SS_ISCONFIRMING |
SS_ISCONNECTED);
if (error == 0) {
if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) == 0) {
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, ENOTCONN);
error = ENOTCONN;
}
}
goto out;
}
}
if (block_allowed) {
error = sbwait(&so->so_rcv);
if (error) {
goto out;
}
held_length = 0;
goto restart_nosblocks;
} else {
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EWOULDBLOCK);
error = EWOULDBLOCK;
goto out;
}
}
if (hold_sblock == 1) {
SOCKBUF_UNLOCK(&so->so_rcv);
hold_sblock = 0;
}
#if defined(__APPLE__) && !defined(__Userspace__)
error = sblock(&so->so_rcv, SBLOCKWAIT(in_flags));
#endif
/* we possibly have data we can read */
/*sa_ignore FREED_MEMORY*/
control = TAILQ_FIRST(&inp->read_queue);
if (control == NULL) {
/* This could be happening since
* the appender did the increment but as not
* yet did the tailq insert onto the read_queue
*/
if (hold_rlock == 0) {
SCTP_INP_READ_LOCK(inp);
}
control = TAILQ_FIRST(&inp->read_queue);
if ((control == NULL) && (so->so_rcv.sb_cc != 0)) {
#ifdef INVARIANTS
panic("Huh, its non zero and nothing on control?");
#endif
so->so_rcv.sb_cc = 0;
}
SCTP_INP_READ_UNLOCK(inp);
hold_rlock = 0;
goto restart;
}
if ((control->length == 0) &&
(control->do_not_ref_stcb)) {
/* Clean up code for freeing assoc that left behind a pdapi..
* maybe a peer in EEOR that just closed after sending and
* never indicated a EOR.
*/
if (hold_rlock == 0) {
hold_rlock = 1;
SCTP_INP_READ_LOCK(inp);
}
control->held_length = 0;
if (control->data) {
/* Hmm there is data here .. fix */
struct mbuf *m_tmp;
int cnt = 0;
m_tmp = control->data;
while (m_tmp) {
cnt += SCTP_BUF_LEN(m_tmp);
if (SCTP_BUF_NEXT(m_tmp) == NULL) {
control->tail_mbuf = m_tmp;
control->end_added = 1;
}
m_tmp = SCTP_BUF_NEXT(m_tmp);
}
control->length = cnt;
} else {
/* remove it */
TAILQ_REMOVE(&inp->read_queue, control, next);
/* Add back any hiddend data */
sctp_free_remote_addr(control->whoFrom);
sctp_free_a_readq(stcb, control);
}
if (hold_rlock) {
hold_rlock = 0;
SCTP_INP_READ_UNLOCK(inp);
}
goto restart;
}
if ((control->length == 0) &&
(control->end_added == 1)) {
/* Do we also need to check for (control->pdapi_aborted == 1)? */
if (hold_rlock == 0) {
hold_rlock = 1;
SCTP_INP_READ_LOCK(inp);
}
TAILQ_REMOVE(&inp->read_queue, control, next);
if (control->data) {
#ifdef INVARIANTS
panic("control->data not null but control->length == 0");
#else
SCTP_PRINTF("Strange, data left in the control buffer. Cleaning up.\n");
sctp_m_freem(control->data);
control->data = NULL;
#endif
}
if (control->aux_data) {
sctp_m_free (control->aux_data);
control->aux_data = NULL;
}
#ifdef INVARIANTS
if (control->on_strm_q) {
panic("About to free ctl:%p so:%p and its in %d",
control, so, control->on_strm_q);
}
#endif
sctp_free_remote_addr(control->whoFrom);
sctp_free_a_readq(stcb, control);
if (hold_rlock) {
hold_rlock = 0;
SCTP_INP_READ_UNLOCK(inp);
}
goto restart;
}
if (control->length == 0) {
if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE)) &&
(filling_sinfo)) {
/* find a more suitable one then this */
ctl = TAILQ_NEXT(control, next);
while (ctl) {
if ((ctl->stcb != control->stcb) && (ctl->length) &&
(ctl->some_taken ||
(ctl->spec_flags & M_NOTIFICATION) ||
((ctl->do_not_ref_stcb == 0) &&
(ctl->stcb->asoc.strmin[ctl->sinfo_stream].delivery_started == 0)))
) {
/*-
* If we have a different TCB next, and there is data
* present. If we have already taken some (pdapi), OR we can
* ref the tcb and no delivery as started on this stream, we
* take it. Note we allow a notification on a different
* assoc to be delivered..
*/
control = ctl;
goto found_one;
} else if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS)) &&
(ctl->length) &&
((ctl->some_taken) ||
((ctl->do_not_ref_stcb == 0) &&
((ctl->spec_flags & M_NOTIFICATION) == 0) &&
(ctl->stcb->asoc.strmin[ctl->sinfo_stream].delivery_started == 0)))) {
/*-
* If we have the same tcb, and there is data present, and we
* have the strm interleave feature present. Then if we have
* taken some (pdapi) or we can refer to tht tcb AND we have
* not started a delivery for this stream, we can take it.
* Note we do NOT allow a notificaiton on the same assoc to
* be delivered.
*/
control = ctl;
goto found_one;
}
ctl = TAILQ_NEXT(ctl, next);
}
}
/*
* if we reach here, not suitable replacement is available
* <or> fragment interleave is NOT on. So stuff the sb_cc
* into the our held count, and its time to sleep again.
*/
held_length = so->so_rcv.sb_cc;
control->held_length = so->so_rcv.sb_cc;
goto restart;
}
/* Clear the held length since there is something to read */
control->held_length = 0;
found_one:
/*
* If we reach here, control has a some data for us to read off.
* Note that stcb COULD be NULL.
*/
if (hold_rlock == 0) {
hold_rlock = 1;
SCTP_INP_READ_LOCK(inp);
}
control->some_taken++;
stcb = control->stcb;
if (stcb) {
if ((control->do_not_ref_stcb == 0) &&
(stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED)) {
if (freecnt_applied == 0)
stcb = NULL;
} else if (control->do_not_ref_stcb == 0) {
/* you can't free it on me please */
/*
* The lock on the socket buffer protects us so the
* free code will stop. But since we used the socketbuf
* lock and the sender uses the tcb_lock to increment,
* we need to use the atomic add to the refcnt
*/
if (freecnt_applied) {
#ifdef INVARIANTS
panic("refcnt already incremented");
#else
SCTP_PRINTF("refcnt already incremented?\n");
#endif
} else {
atomic_add_int(&stcb->asoc.refcnt, 1);
freecnt_applied = 1;
}
/*
* Setup to remember how much we have not yet told
* the peer our rwnd has opened up. Note we grab
* the value from the tcb from last time.
* Note too that sack sending clears this when a sack
* is sent, which is fine. Once we hit the rwnd_req,
* we then will go to the sctp_user_rcvd() that will
* not lock until it KNOWs it MUST send a WUP-SACK.
*/
freed_so_far = (uint32_t)stcb->freed_by_sorcv_sincelast;
stcb->freed_by_sorcv_sincelast = 0;
}
}
if (stcb &&
((control->spec_flags & M_NOTIFICATION) == 0) &&
control->do_not_ref_stcb == 0) {
stcb->asoc.strmin[control->sinfo_stream].delivery_started = 1;
}
/* First lets get off the sinfo and sockaddr info */
if ((sinfo != NULL) && (filling_sinfo != 0)) {
sinfo->sinfo_stream = control->sinfo_stream;
sinfo->sinfo_ssn = (uint16_t)control->mid;
sinfo->sinfo_flags = control->sinfo_flags;
sinfo->sinfo_ppid = control->sinfo_ppid;
sinfo->sinfo_context =control->sinfo_context;
sinfo->sinfo_timetolive = control->sinfo_timetolive;
sinfo->sinfo_tsn = control->sinfo_tsn;
sinfo->sinfo_cumtsn = control->sinfo_cumtsn;
sinfo->sinfo_assoc_id = control->sinfo_assoc_id;
nxt = TAILQ_NEXT(control, next);
if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXT_RCVINFO) ||
sctp_is_feature_on(inp, SCTP_PCB_FLAGS_RECVNXTINFO)) {
struct sctp_extrcvinfo *s_extra;
s_extra = (struct sctp_extrcvinfo *)sinfo;
if ((nxt) &&
(nxt->length)) {
s_extra->serinfo_next_flags = SCTP_NEXT_MSG_AVAIL;
if (nxt->sinfo_flags & SCTP_UNORDERED) {
s_extra->serinfo_next_flags |= SCTP_NEXT_MSG_IS_UNORDERED;
}
if (nxt->spec_flags & M_NOTIFICATION) {
s_extra->serinfo_next_flags |= SCTP_NEXT_MSG_IS_NOTIFICATION;
}
s_extra->serinfo_next_aid = nxt->sinfo_assoc_id;
s_extra->serinfo_next_length = nxt->length;
s_extra->serinfo_next_ppid = nxt->sinfo_ppid;
s_extra->serinfo_next_stream = nxt->sinfo_stream;
if (nxt->tail_mbuf != NULL) {
if (nxt->end_added) {
s_extra->serinfo_next_flags |= SCTP_NEXT_MSG_ISCOMPLETE;
}
}
} else {
/* we explicitly 0 this, since the memcpy got
* some other things beyond the older sinfo_
* that is on the control's structure :-D
*/
nxt = NULL;
s_extra->serinfo_next_flags = SCTP_NO_NEXT_MSG;
s_extra->serinfo_next_aid = 0;
s_extra->serinfo_next_length = 0;
s_extra->serinfo_next_ppid = 0;
s_extra->serinfo_next_stream = 0;
}
}
/*
* update off the real current cum-ack, if we have an stcb.
*/
if ((control->do_not_ref_stcb == 0) && stcb)
sinfo->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
/*
* mask off the high bits, we keep the actual chunk bits in
* there.
*/
sinfo->sinfo_flags &= 0x00ff;
if ((control->sinfo_flags >> 8) & SCTP_DATA_UNORDERED) {
sinfo->sinfo_flags |= SCTP_UNORDERED;
}
}
#ifdef SCTP_ASOCLOG_OF_TSNS
{
int index, newindex;
struct sctp_pcbtsn_rlog *entry;
do {
index = inp->readlog_index;
newindex = index + 1;
if (newindex >= SCTP_READ_LOG_SIZE) {
newindex = 0;
}
} while (atomic_cmpset_int(&inp->readlog_index, index, newindex) == 0);
entry = &inp->readlog[index];
entry->vtag = control->sinfo_assoc_id;
entry->strm = control->sinfo_stream;
entry->seq = (uint16_t)control->mid;
entry->sz = control->length;
entry->flgs = control->sinfo_flags;
}
#endif
if ((fromlen > 0) && (from != NULL)) {
union sctp_sockstore store;
size_t len;
switch (control->whoFrom->ro._l_addr.sa.sa_family) {
#ifdef INET6
case AF_INET6:
len = sizeof(struct sockaddr_in6);
store.sin6 = control->whoFrom->ro._l_addr.sin6;
store.sin6.sin6_port = control->port_from;
break;
#endif
#ifdef INET
case AF_INET:
#ifdef INET6
if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NEEDS_MAPPED_V4)) {
len = sizeof(struct sockaddr_in6);
in6_sin_2_v4mapsin6(&control->whoFrom->ro._l_addr.sin,
&store.sin6);
store.sin6.sin6_port = control->port_from;
} else {
len = sizeof(struct sockaddr_in);
store.sin = control->whoFrom->ro._l_addr.sin;
store.sin.sin_port = control->port_from;
}
#else
len = sizeof(struct sockaddr_in);
store.sin = control->whoFrom->ro._l_addr.sin;
store.sin.sin_port = control->port_from;
#endif
break;
#endif
#if defined(__Userspace__)
case AF_CONN:
len = sizeof(struct sockaddr_conn);
store.sconn = control->whoFrom->ro._l_addr.sconn;
store.sconn.sconn_port = control->port_from;
break;
#endif
default:
len = 0;
break;
}
memcpy(from, &store, min((size_t)fromlen, len));
#if defined(SCTP_EMBEDDED_V6_SCOPE)
#ifdef INET6
{
struct sockaddr_in6 lsa6, *from6;
from6 = (struct sockaddr_in6 *)from;
sctp_recover_scope_mac(from6, (&lsa6));
}
#endif
#endif
}
if (hold_rlock) {
SCTP_INP_READ_UNLOCK(inp);
hold_rlock = 0;
}
if (hold_sblock) {
SOCKBUF_UNLOCK(&so->so_rcv);
hold_sblock = 0;
}
/* now copy out what data we can */
if (mp == NULL) {
/* copy out each mbuf in the chain up to length */
get_more_data:
m = control->data;
while (m) {
/* Move out all we can */
#if defined(__APPLE__) && !defined(__Userspace__)
#if defined(APPLE_LEOPARD)
cp_len = uio->uio_resid;
#else
cp_len = uio_resid(uio);
#endif
#else
cp_len = uio->uio_resid;
#endif
my_len = SCTP_BUF_LEN(m);
if (cp_len > my_len) {
/* not enough in this buf */
cp_len = my_len;
}
if (hold_rlock) {
SCTP_INP_READ_UNLOCK(inp);
hold_rlock = 0;
}
#if defined(__APPLE__) && !defined(__Userspace__)
SCTP_SOCKET_UNLOCK(so, 0);
#endif
if (cp_len > 0)
error = uiomove(mtod(m, char *), (int)cp_len, uio);
#if defined(__APPLE__) && !defined(__Userspace__)
SCTP_SOCKET_LOCK(so, 0);
#endif
/* re-read */
if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
goto release;
}
if ((control->do_not_ref_stcb == 0) && stcb &&
stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
no_rcv_needed = 1;
}
if (error) {
/* error we are out of here */
goto release;
}
SCTP_INP_READ_LOCK(inp);
hold_rlock = 1;
if (cp_len == SCTP_BUF_LEN(m)) {
if ((SCTP_BUF_NEXT(m)== NULL) &&
(control->end_added)) {
out_flags |= MSG_EOR;
if ((control->do_not_ref_stcb == 0) &&
(control->stcb != NULL) &&
((control->spec_flags & M_NOTIFICATION) == 0))
control->stcb->asoc.strmin[control->sinfo_stream].delivery_started = 0;
}
if (control->spec_flags & M_NOTIFICATION) {
out_flags |= MSG_NOTIFICATION;
}
/* we ate up the mbuf */
if (in_flags & MSG_PEEK) {
/* just looking */
m = SCTP_BUF_NEXT(m);
copied_so_far += cp_len;
} else {
/* dispose of the mbuf */
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
sctp_sblog(&so->so_rcv,
control->do_not_ref_stcb?NULL:stcb, SCTP_LOG_SBFREE, SCTP_BUF_LEN(m));
}
sctp_sbfree(control, stcb, &so->so_rcv, m);
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
sctp_sblog(&so->so_rcv,
control->do_not_ref_stcb?NULL:stcb, SCTP_LOG_SBRESULT, 0);
}
copied_so_far += cp_len;
freed_so_far += (uint32_t)cp_len;
freed_so_far += MSIZE;
atomic_subtract_int(&control->length, cp_len);
control->data = sctp_m_free(m);
m = control->data;
/* been through it all, must hold sb lock ok to null tail */
if (control->data == NULL) {
#ifdef INVARIANTS
#if defined(__FreeBSD__) && !defined(__Userspace__)
if ((control->end_added == 0) ||
(TAILQ_NEXT(control, next) == NULL)) {
/* If the end is not added, OR the
* next is NOT null we MUST have the lock.
*/
if (mtx_owned(&inp->inp_rdata_mtx) == 0) {
panic("Hmm we don't own the lock?");
}
}
#endif
#endif
control->tail_mbuf = NULL;
#ifdef INVARIANTS
if ((control->end_added) && ((out_flags & MSG_EOR) == 0)) {
panic("end_added, nothing left and no MSG_EOR");
}
#endif
}
}
} else {
/* Do we need to trim the mbuf? */
if (control->spec_flags & M_NOTIFICATION) {
out_flags |= MSG_NOTIFICATION;
}
if ((in_flags & MSG_PEEK) == 0) {
SCTP_BUF_RESV_UF(m, cp_len);
SCTP_BUF_LEN(m) -= (int)cp_len;
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
sctp_sblog(&so->so_rcv, control->do_not_ref_stcb?NULL:stcb, SCTP_LOG_SBFREE, (int)cp_len);
}
atomic_subtract_int(&so->so_rcv.sb_cc, cp_len);
if ((control->do_not_ref_stcb == 0) &&
stcb) {
atomic_subtract_int(&stcb->asoc.sb_cc, cp_len);
}
copied_so_far += cp_len;
freed_so_far += (uint32_t)cp_len;
freed_so_far += MSIZE;
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
sctp_sblog(&so->so_rcv, control->do_not_ref_stcb?NULL:stcb,
SCTP_LOG_SBRESULT, 0);
}
atomic_subtract_int(&control->length, cp_len);
} else {
copied_so_far += cp_len;
}
}
#if defined(__APPLE__) && !defined(__Userspace__)
#if defined(APPLE_LEOPARD)
if ((out_flags & MSG_EOR) || (uio->uio_resid == 0)) {
#else
if ((out_flags & MSG_EOR) || (uio_resid(uio) == 0)) {
#endif
#else
if ((out_flags & MSG_EOR) || (uio->uio_resid == 0)) {
#endif
break;
}
if (((stcb) && (in_flags & MSG_PEEK) == 0) &&
(control->do_not_ref_stcb == 0) &&
(freed_so_far >= rwnd_req)) {
sctp_user_rcvd(stcb, &freed_so_far, hold_rlock, rwnd_req);
}
} /* end while(m) */
/*
* At this point we have looked at it all and we either have
* a MSG_EOR/or read all the user wants... <OR>
* control->length == 0.
*/
if ((out_flags & MSG_EOR) && ((in_flags & MSG_PEEK) == 0)) {
/* we are done with this control */
if (control->length == 0) {
if (control->data) {
#ifdef INVARIANTS
panic("control->data not null at read eor?");
#else
SCTP_PRINTF("Strange, data left in the control buffer .. invarients would panic?\n");
sctp_m_freem(control->data);
control->data = NULL;
#endif
}
done_with_control:
if (hold_rlock == 0) {
SCTP_INP_READ_LOCK(inp);
hold_rlock = 1;
}
TAILQ_REMOVE(&inp->read_queue, control, next);
/* Add back any hiddend data */
if (control->held_length) {
held_length = 0;
control->held_length = 0;
wakeup_read_socket = 1;
}
if (control->aux_data) {
sctp_m_free (control->aux_data);
control->aux_data = NULL;
}
no_rcv_needed = control->do_not_ref_stcb;
sctp_free_remote_addr(control->whoFrom);
control->data = NULL;
#ifdef INVARIANTS
if (control->on_strm_q) {
panic("About to free ctl:%p so:%p and its in %d",
control, so, control->on_strm_q);
}
#endif
sctp_free_a_readq(stcb, control);
control = NULL;
if ((freed_so_far >= rwnd_req) &&
(no_rcv_needed == 0))
sctp_user_rcvd(stcb, &freed_so_far, hold_rlock, rwnd_req);
} else {
/*
* The user did not read all of this
* message, turn off the returned MSG_EOR
* since we are leaving more behind on the
* control to read.
*/
#ifdef INVARIANTS
if (control->end_added &&
(control->data == NULL) &&
(control->tail_mbuf == NULL)) {
panic("Gak, control->length is corrupt?");
}
#endif
no_rcv_needed = control->do_not_ref_stcb;
out_flags &= ~MSG_EOR;
}
}
if (out_flags & MSG_EOR) {
goto release;
}
#if defined(__APPLE__) && !defined(__Userspace__)
#if defined(APPLE_LEOPARD)
if ((uio->uio_resid == 0) ||
#else
if ((uio_resid(uio) == 0) ||
#endif
#else
if ((uio->uio_resid == 0) ||
#endif
((in_eeor_mode) &&
(copied_so_far >= max(so->so_rcv.sb_lowat, 1)))) {
goto release;
}
/*
* If I hit here the receiver wants more and this message is
* NOT done (pd-api). So two questions. Can we block? if not
* we are done. Did the user NOT set MSG_WAITALL?
*/
if (block_allowed == 0) {
goto release;
}
/*
* We need to wait for more data a few things: - We don't
* sbunlock() so we don't get someone else reading. - We
* must be sure to account for the case where what is added
* is NOT to our control when we wakeup.
*/
/* Do we need to tell the transport a rwnd update might be
* needed before we go to sleep?
*/
if (((stcb) && (in_flags & MSG_PEEK) == 0) &&
((freed_so_far >= rwnd_req) &&
(control->do_not_ref_stcb == 0) &&
(no_rcv_needed == 0))) {
sctp_user_rcvd(stcb, &freed_so_far, hold_rlock, rwnd_req);
}
wait_some_more:
#if (defined(__FreeBSD__) || defined(_WIN32)) && !defined(__Userspace__)
if (so->so_rcv.sb_state & SBS_CANTRCVMORE) {
goto release;
}
#else
if (so->so_state & SS_CANTRCVMORE) {
goto release;
}
#endif
if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)
goto release;
if (hold_rlock == 1) {
SCTP_INP_READ_UNLOCK(inp);
hold_rlock = 0;
}
if (hold_sblock == 0) {
SOCKBUF_LOCK(&so->so_rcv);
hold_sblock = 1;
}
if ((copied_so_far) && (control->length == 0) &&
(sctp_is_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE))) {
goto release;
}
#if defined(__APPLE__) && !defined(__Userspace__)
sbunlock(&so->so_rcv, 1);
#endif
if (so->so_rcv.sb_cc <= control->held_length) {
error = sbwait(&so->so_rcv);
if (error) {
#if defined(__FreeBSD__) && !defined(__Userspace__)
goto release;
#else
goto release_unlocked;
#endif
}
control->held_length = 0;
}
#if defined(__APPLE__) && !defined(__Userspace__)
error = sblock(&so->so_rcv, SBLOCKWAIT(in_flags));
#endif
if (hold_sblock) {
SOCKBUF_UNLOCK(&so->so_rcv);
hold_sblock = 0;
}
if (control->length == 0) {
/* still nothing here */
if (control->end_added == 1) {
/* he aborted, or is done i.e.did a shutdown */
out_flags |= MSG_EOR;
if (control->pdapi_aborted) {
if ((control->do_not_ref_stcb == 0) && ((control->spec_flags & M_NOTIFICATION) == 0))
control->stcb->asoc.strmin[control->sinfo_stream].delivery_started = 0;
out_flags |= MSG_TRUNC;
} else {
if ((control->do_not_ref_stcb == 0) && ((control->spec_flags & M_NOTIFICATION) == 0))
control->stcb->asoc.strmin[control->sinfo_stream].delivery_started = 0;
}
goto done_with_control;
}
if (so->so_rcv.sb_cc > held_length) {
control->held_length = so->so_rcv.sb_cc;
held_length = 0;
}
goto wait_some_more;
} else if (control->data == NULL) {
/* we must re-sync since data
* is probably being added
*/
SCTP_INP_READ_LOCK(inp);
if ((control->length > 0) && (control->data == NULL)) {
/* big trouble.. we have the lock and its corrupt? */
#ifdef INVARIANTS
panic ("Impossible data==NULL length !=0");
#endif
out_flags |= MSG_EOR;
out_flags |= MSG_TRUNC;
control->length = 0;
SCTP_INP_READ_UNLOCK(inp);
goto done_with_control;
}
SCTP_INP_READ_UNLOCK(inp);
/* We will fall around to get more data */
}
goto get_more_data;
} else {
/*-
* Give caller back the mbuf chain,
* store in uio_resid the length
*/
wakeup_read_socket = 0;
if ((control->end_added == 0) ||
(TAILQ_NEXT(control, next) == NULL)) {
/* Need to get rlock */
if (hold_rlock == 0) {
SCTP_INP_READ_LOCK(inp);
hold_rlock = 1;
}
}
if (control->end_added) {
out_flags |= MSG_EOR;
if ((control->do_not_ref_stcb == 0) &&
(control->stcb != NULL) &&
((control->spec_flags & M_NOTIFICATION) == 0))
control->stcb->asoc.strmin[control->sinfo_stream].delivery_started = 0;
}
if (control->spec_flags & M_NOTIFICATION) {
out_flags |= MSG_NOTIFICATION;
}
#if defined(__APPLE__) && !defined(__Userspace__)
#if defined(APPLE_LEOPARD)
uio->uio_resid = control->length;
#else
uio_setresid(uio, control->length);
#endif
#else
uio->uio_resid = control->length;
#endif
*mp = control->data;
m = control->data;
while (m) {
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
sctp_sblog(&so->so_rcv,
control->do_not_ref_stcb?NULL:stcb, SCTP_LOG_SBFREE, SCTP_BUF_LEN(m));
}
sctp_sbfree(control, stcb, &so->so_rcv, m);
freed_so_far += (uint32_t)SCTP_BUF_LEN(m);
freed_so_far += MSIZE;
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
sctp_sblog(&so->so_rcv,
control->do_not_ref_stcb?NULL:stcb, SCTP_LOG_SBRESULT, 0);
}
m = SCTP_BUF_NEXT(m);
}
control->data = control->tail_mbuf = NULL;
control->length = 0;
if (out_flags & MSG_EOR) {
/* Done with this control */
goto done_with_control;
}
}
release:
if (hold_rlock == 1) {
SCTP_INP_READ_UNLOCK(inp);
hold_rlock = 0;
}
#if defined(__Userspace__)
if (hold_sblock == 0) {
SOCKBUF_LOCK(&so->so_rcv);
hold_sblock = 1;
}
#else
if (hold_sblock == 1) {
SOCKBUF_UNLOCK(&so->so_rcv);
hold_sblock = 0;
}
#endif
#if defined(__APPLE__) && !defined(__Userspace__)
sbunlock(&so->so_rcv, 1);
#endif
#if defined(__FreeBSD__) && !defined(__Userspace__)
sbunlock(&so->so_rcv);
sockbuf_lock = 0;
#endif
release_unlocked:
if (hold_sblock) {
SOCKBUF_UNLOCK(&so->so_rcv);
hold_sblock = 0;
}
if ((stcb) && (in_flags & MSG_PEEK) == 0) {
if ((freed_so_far >= rwnd_req) &&
(control && (control->do_not_ref_stcb == 0)) &&
(no_rcv_needed == 0))
sctp_user_rcvd(stcb, &freed_so_far, hold_rlock, rwnd_req);
}
out:
if (msg_flags) {
*msg_flags = out_flags;
}
if (((out_flags & MSG_EOR) == 0) &&
((in_flags & MSG_PEEK) == 0) &&
(sinfo) &&
(sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXT_RCVINFO) ||
sctp_is_feature_on(inp, SCTP_PCB_FLAGS_RECVNXTINFO))) {
struct sctp_extrcvinfo *s_extra;
s_extra = (struct sctp_extrcvinfo *)sinfo;
s_extra->serinfo_next_flags = SCTP_NO_NEXT_MSG;
}
if (hold_rlock == 1) {
SCTP_INP_READ_UNLOCK(inp);
}
if (hold_sblock) {
SOCKBUF_UNLOCK(&so->so_rcv);
}
#if defined(__FreeBSD__) && !defined(__Userspace__)
if (sockbuf_lock) {
sbunlock(&so->so_rcv);
}
#endif
if (freecnt_applied) {
/*
* The lock on the socket buffer protects us so the free
* code will stop. But since we used the socketbuf lock and
* the sender uses the tcb_lock to increment, we need to use
* the atomic add to the refcnt.
*/
if (stcb == NULL) {
#ifdef INVARIANTS
panic("stcb for refcnt has gone NULL?");
goto stage_left;
#else
goto stage_left;
#endif
}
/* Save the value back for next time */
stcb->freed_by_sorcv_sincelast = freed_so_far;
atomic_add_int(&stcb->asoc.refcnt, -1);
}
if (SCTP_BASE_SYSCTL(sctp_logging_level) &SCTP_RECV_RWND_LOGGING_ENABLE) {
if (stcb) {
sctp_misc_ints(SCTP_SORECV_DONE,
freed_so_far,
#if defined(__APPLE__) && !defined(__Userspace__)
#if defined(APPLE_LEOPARD)
((uio) ? (slen - uio->uio_resid) : slen),
#else
((uio) ? (slen - uio_resid(uio)) : slen),
#endif
#else
(uint32_t)((uio) ? (slen - uio->uio_resid) : slen),
#endif
stcb->asoc.my_rwnd,
so->so_rcv.sb_cc);
} else {
sctp_misc_ints(SCTP_SORECV_DONE,
freed_so_far,
#if defined(__APPLE__) && !defined(__Userspace__)
#if defined(APPLE_LEOPARD)
((uio) ? (slen - uio->uio_resid) : slen),
#else
((uio) ? (slen - uio_resid(uio)) : slen),
#endif
#else
(uint32_t)((uio) ? (slen - uio->uio_resid) : slen),
#endif
0,
so->so_rcv.sb_cc);
}
}
stage_left:
if (wakeup_read_socket) {
sctp_sorwakeup(inp, so);
}
return (error);
}
#ifdef SCTP_MBUF_LOGGING
struct mbuf *
sctp_m_free(struct mbuf *m)
{
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
sctp_log_mb(m, SCTP_MBUF_IFREE);
}
return (m_free(m));
}
void
sctp_m_freem(struct mbuf *mb)
{
while (mb != NULL)
mb = sctp_m_free(mb);
}
#endif
int
sctp_dynamic_set_primary(struct sockaddr *sa, uint32_t vrf_id)
{
/* Given a local address. For all associations
* that holds the address, request a peer-set-primary.
*/
struct sctp_ifa *ifa;
struct sctp_laddr *wi;
ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED);
if (ifa == NULL) {
SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTPUTIL, EADDRNOTAVAIL);
return (EADDRNOTAVAIL);
}
/* Now that we have the ifa we must awaken the
* iterator with this message.
*/
wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
if (wi == NULL) {
SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTPUTIL, ENOMEM);
return (ENOMEM);
}
/* Now incr the count and int wi structure */
SCTP_INCR_LADDR_COUNT();
memset(wi, 0, sizeof(*wi));
(void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
wi->ifa = ifa;
wi->action = SCTP_SET_PRIM_ADDR;
atomic_add_int(&ifa->refcount, 1);
/* Now add it to the work queue */
SCTP_WQ_ADDR_LOCK();
/*
* Should this really be a tailq? As it is we will process the
* newest first :-0
*/
LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
(struct sctp_inpcb *)NULL,
(struct sctp_tcb *)NULL,
(struct sctp_nets *)NULL);
SCTP_WQ_ADDR_UNLOCK();
return (0);
}
#if defined(__Userspace__)
/* no sctp_soreceive for __Userspace__ now */
#endif
#if !defined(__Userspace__)
int
sctp_soreceive( struct socket *so,
struct sockaddr **psa,
struct uio *uio,
struct mbuf **mp0,
struct mbuf **controlp,
int *flagsp)
{
int error, fromlen;
uint8_t sockbuf[256];
struct sockaddr *from;
struct sctp_extrcvinfo sinfo;
int filling_sinfo = 1;
int flags;
struct sctp_inpcb *inp;
inp = (struct sctp_inpcb *)so->so_pcb;
/* pickup the assoc we are reading from */
if (inp == NULL) {
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
return (EINVAL);
}
if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_RECVDATAIOEVNT) &&
sctp_is_feature_off(inp, SCTP_PCB_FLAGS_RECVRCVINFO) &&
sctp_is_feature_off(inp, SCTP_PCB_FLAGS_RECVNXTINFO)) ||
(controlp == NULL)) {
/* user does not want the sndrcv ctl */
filling_sinfo = 0;
}
if (psa) {
from = (struct sockaddr *)sockbuf;
fromlen = sizeof(sockbuf);
#ifdef HAVE_SA_LEN
from->sa_len = 0;
#endif
} else {
from = NULL;
fromlen = 0;
}
#if defined(__APPLE__) && !defined(__Userspace__)
SCTP_SOCKET_LOCK(so, 1);
#endif
if (filling_sinfo) {
memset(&sinfo, 0, sizeof(struct sctp_extrcvinfo));
}
if (flagsp != NULL) {
flags = *flagsp;
} else {
flags = 0;
}
error = sctp_sorecvmsg(so, uio, mp0, from, fromlen, &flags,
(struct sctp_sndrcvinfo *)&sinfo, filling_sinfo);
if (flagsp != NULL) {
*flagsp = flags;
}
if (controlp != NULL) {
/* copy back the sinfo in a CMSG format */
if (filling_sinfo && ((flags & MSG_NOTIFICATION) == 0)) {
*controlp = sctp_build_ctl_nchunk(inp,
(struct sctp_sndrcvinfo *)&sinfo);
} else {
*controlp = NULL;
}
}
if (psa) {
/* copy back the address info */
#ifdef HAVE_SA_LEN
if (from && from->sa_len) {
#else
if (from) {
#endif
#if (defined(__FreeBSD__) || defined(_WIN32)) && !defined(__Userspace__)
*psa = sodupsockaddr(from, M_NOWAIT);
#else
*psa = dup_sockaddr(from, mp0 == 0);
#endif
} else {
*psa = NULL;
}
}
#if defined(__APPLE__) && !defined(__Userspace__)
SCTP_SOCKET_UNLOCK(so, 1);
#endif
return (error);
}
#if defined(_WIN32) && !defined(__Userspace__)
/*
* General routine to allocate a hash table with control of memory flags.
* is in 7.0 and beyond for sure :-)
*/
void *
sctp_hashinit_flags(int elements, struct malloc_type *type,
u_long *hashmask, int flags)
{
long hashsize;
LIST_HEAD(generic, generic) *hashtbl;
int i;
if (elements <= 0) {
#ifdef INVARIANTS
panic("hashinit: bad elements");
#else
SCTP_PRINTF("hashinit: bad elements?");
elements = 1;
#endif
}
for (hashsize = 1; hashsize <= elements; hashsize <<= 1)
continue;
hashsize >>= 1;
if (flags & HASH_WAITOK)
hashtbl = malloc((u_long)hashsize * sizeof(*hashtbl), type, M_WAITOK);
else if (flags & HASH_NOWAIT)
hashtbl = malloc((u_long)hashsize * sizeof(*hashtbl), type, M_NOWAIT);
else {
#ifdef INVARIANTS
panic("flag incorrect in hashinit_flags");
#else
return (NULL);
#endif
}
/* no memory? */
if (hashtbl == NULL)
return (NULL);
for (i = 0; i < hashsize; i++)
LIST_INIT(&hashtbl[i]);
*hashmask = hashsize - 1;
return (hashtbl);
}
#endif
#else /* __Userspace__ ifdef above sctp_soreceive */
/*
* __Userspace__ Defining sctp_hashinit_flags() and sctp_hashdestroy() for userland.
* NOTE: We don't want multiple definitions here. So sctp_hashinit_flags() above for
*__FreeBSD__ must be excluded.
*
*/
void *
sctp_hashinit_flags(int elements, struct malloc_type *type,
u_long *hashmask, int flags)
{
long hashsize;
LIST_HEAD(generic, generic) *hashtbl;
int i;
if (elements <= 0) {
SCTP_PRINTF("hashinit: bad elements?");
#ifdef INVARIANTS
return (NULL);
#else
elements = 1;
#endif
}
for (hashsize = 1; hashsize <= elements; hashsize <<= 1)
continue;
hashsize >>= 1;
/*cannot use MALLOC here because it has to be declared or defined
using MALLOC_DECLARE or MALLOC_DEFINE first. */
if (flags & HASH_WAITOK)
hashtbl = malloc((u_long)hashsize * sizeof(*hashtbl));
else if (flags & HASH_NOWAIT)
hashtbl = malloc((u_long)hashsize * sizeof(*hashtbl));
else {
#ifdef INVARIANTS
SCTP_PRINTF("flag incorrect in hashinit_flags.\n");
#endif
return (NULL);
}
/* no memory? */
if (hashtbl == NULL)
return (NULL);
for (i = 0; i < hashsize; i++)
LIST_INIT(&hashtbl[i]);
*hashmask = hashsize - 1;
return (hashtbl);
}
void
sctp_hashdestroy(void *vhashtbl, struct malloc_type *type, u_long hashmask)
{
LIST_HEAD(generic, generic) *hashtbl, *hp;
hashtbl = vhashtbl;
for (hp = hashtbl; hp <= &hashtbl[hashmask]; hp++)
if (!LIST_EMPTY(hp)) {
SCTP_PRINTF("hashdestroy: hash not empty.\n");
return;
}
FREE(hashtbl, type);
}
void
sctp_hashfreedestroy(void *vhashtbl, struct malloc_type *type, u_long hashmask)
{
LIST_HEAD(generic, generic) *hashtbl/*, *hp*/;
/*
LIST_ENTRY(type) *start, *temp;
*/
hashtbl = vhashtbl;
/* Apparently temp is not dynamically allocated, so attempts to
free it results in error.
for (hp = hashtbl; hp <= &hashtbl[hashmask]; hp++)
if (!LIST_EMPTY(hp)) {
start = LIST_FIRST(hp);
while (start != NULL) {
temp = start;
start = start->le_next;
SCTP_PRINTF("%s: %p \n", __func__, (void *)temp);
FREE(temp, type);
}
}
*/
FREE(hashtbl, type);
}
#endif
int
sctp_connectx_helper_add(struct sctp_tcb *stcb, struct sockaddr *addr,
int totaddr, int *error)
{
int added = 0;
int i;
struct sctp_inpcb *inp;
struct sockaddr *sa;
size_t incr = 0;
#ifdef INET
struct sockaddr_in *sin;
#endif
#ifdef INET6
struct sockaddr_in6 *sin6;
#endif
sa = addr;
inp = stcb->sctp_ep;
*error = 0;
for (i = 0; i < totaddr; i++) {
switch (sa->sa_family) {
#ifdef INET
case AF_INET:
incr = sizeof(struct sockaddr_in);
sin = (struct sockaddr_in *)sa;
if ((sin->sin_addr.s_addr == INADDR_ANY) ||
(sin->sin_addr.s_addr == INADDR_BROADCAST) ||
IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
(void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
SCTP_FROM_SCTPUTIL + SCTP_LOC_7);
*error = EINVAL;
goto out_now;
}
if (sctp_add_remote_addr(stcb, sa, NULL, stcb->asoc.port,
SCTP_DONOT_SETSCOPE,
SCTP_ADDR_IS_CONFIRMED)) {
/* assoc gone no un-lock */
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTPUTIL, ENOBUFS);
(void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
SCTP_FROM_SCTPUTIL + SCTP_LOC_8);
*error = ENOBUFS;
goto out_now;
}
added++;
break;
#endif
#ifdef INET6
case AF_INET6:
incr = sizeof(struct sockaddr_in6);
sin6 = (struct sockaddr_in6 *)sa;
if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
(void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
SCTP_FROM_SCTPUTIL + SCTP_LOC_9);
*error = EINVAL;
goto out_now;
}
if (sctp_add_remote_addr(stcb, sa, NULL, stcb->asoc.port,
SCTP_DONOT_SETSCOPE,
SCTP_ADDR_IS_CONFIRMED)) {
/* assoc gone no un-lock */
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTPUTIL, ENOBUFS);
(void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
SCTP_FROM_SCTPUTIL + SCTP_LOC_10);
*error = ENOBUFS;
goto out_now;
}
added++;
break;
#endif
#if defined(__Userspace__)
case AF_CONN:
incr = sizeof(struct sockaddr_conn);
if (sctp_add_remote_addr(stcb, sa, NULL, stcb->asoc.port,
SCTP_DONOT_SETSCOPE,
SCTP_ADDR_IS_CONFIRMED)) {
/* assoc gone no un-lock */
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTPUTIL, ENOBUFS);
(void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
SCTP_FROM_SCTPUTIL + SCTP_LOC_11);
*error = ENOBUFS;
goto out_now;
}
added++;
break;
#endif
default:
break;
}
sa = (struct sockaddr *)((caddr_t)sa + incr);
}
out_now:
return (added);
}
int
sctp_connectx_helper_find(struct sctp_inpcb *inp, struct sockaddr *addr,
unsigned int totaddr,
unsigned int *num_v4, unsigned int *num_v6,
unsigned int limit)
{
struct sockaddr *sa;
struct sctp_tcb *stcb;
unsigned int incr, at, i;
at = 0;
sa = addr;
*num_v6 = *num_v4 = 0;
/* account and validate addresses */
if (totaddr == 0) {
return (EINVAL);
}
for (i = 0; i < totaddr; i++) {
if (at + sizeof(struct sockaddr) > limit) {
return (EINVAL);
}
switch (sa->sa_family) {
#ifdef INET
case AF_INET:
incr = (unsigned int)sizeof(struct sockaddr_in);
#ifdef HAVE_SA_LEN
if (sa->sa_len != incr) {
return (EINVAL);
}
#endif
(*num_v4) += 1;
break;
#endif
#ifdef INET6
case AF_INET6:
{
struct sockaddr_in6 *sin6;
sin6 = (struct sockaddr_in6 *)sa;
if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
/* Must be non-mapped for connectx */
return (EINVAL);
}
incr = (unsigned int)sizeof(struct sockaddr_in6);
#ifdef HAVE_SA_LEN
if (sa->sa_len != incr) {
return (EINVAL);
}
#endif
(*num_v6) += 1;
break;
}
#endif
default:
return (EINVAL);
}
if ((at + incr) > limit) {
return (EINVAL);
}
SCTP_INP_INCR_REF(inp);
stcb = sctp_findassociation_ep_addr(&inp, sa, NULL, NULL, NULL);
if (stcb != NULL) {
SCTP_TCB_UNLOCK(stcb);
return (EALREADY);
} else {
SCTP_INP_DECR_REF(inp);
}
at += incr;
sa = (struct sockaddr *)((caddr_t)sa + incr);
}
return (0);
}
/*
* sctp_bindx(ADD) for one address.
* assumes all arguments are valid/checked by caller.
*/
void
sctp_bindx_add_address(struct socket *so, struct sctp_inpcb *inp,
struct sockaddr *sa, uint32_t vrf_id, int *error,
void *p)
{
#if defined(INET) && defined(INET6)
struct sockaddr_in sin;
#endif
#ifdef INET6
struct sockaddr_in6 *sin6;
#endif
#ifdef INET
struct sockaddr_in *sinp;
#endif
struct sockaddr *addr_to_use;
struct sctp_inpcb *lep;
#ifdef SCTP_MVRF
int i;
#endif
uint16_t port;
/* see if we're bound all already! */
if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
*error = EINVAL;
return;
}
#ifdef SCTP_MVRF
/* Is the VRF one we have */
for (i = 0; i < inp->num_vrfs; i++) {
if (vrf_id == inp->m_vrf_ids[i]) {
break;
}
}
if (i == inp->num_vrfs) {
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
*error = EINVAL;
return;
}
#endif
switch (sa->sa_family) {
#ifdef INET6
case AF_INET6:
#ifdef HAVE_SA_LEN
if (sa->sa_len != sizeof(struct sockaddr_in6)) {
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
*error = EINVAL;
return;
}
#endif
if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
/* can only bind v6 on PF_INET6 sockets */
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
*error = EINVAL;
return;
}
sin6 = (struct sockaddr_in6 *)sa;
port = sin6->sin6_port;
#ifdef INET
if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
SCTP_IPV6_V6ONLY(inp)) {
/* can't bind v4-mapped on PF_INET sockets */
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
*error = EINVAL;
return;
}
in6_sin6_2_sin(&sin, sin6);
addr_to_use = (struct sockaddr *)&sin;
} else {
addr_to_use = sa;
}
#else
addr_to_use = sa;
#endif
break;
#endif
#ifdef INET
case AF_INET:
#ifdef HAVE_SA_LEN
if (sa->sa_len != sizeof(struct sockaddr_in)) {
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
*error = EINVAL;
return;
}
#endif
if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
SCTP_IPV6_V6ONLY(inp)) {
/* can't bind v4 on PF_INET sockets */
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
*error = EINVAL;
return;
}
sinp = (struct sockaddr_in *)sa;
port = sinp->sin_port;
addr_to_use = sa;
break;
#endif
default:
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
*error = EINVAL;
return;
}
if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
#if !(defined(_WIN32) || defined(__Userspace__))
if (p == NULL) {
/* Can't get proc for Net/Open BSD */
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
*error = EINVAL;
return;
}
#endif
*error = sctp_inpcb_bind(so, addr_to_use, NULL, p);
return;
}
/* Validate the incoming port. */
if ((port != 0) && (port != inp->sctp_lport)) {
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
*error = EINVAL;
return;
}
lep = sctp_pcb_findep(addr_to_use, 1, 0, vrf_id);
if (lep == NULL) {
/* add the address */
*error = sctp_addr_mgmt_ep_sa(inp, addr_to_use,
SCTP_ADD_IP_ADDRESS, vrf_id);
} else {
if (lep != inp) {
*error = EADDRINUSE;
}
SCTP_INP_DECR_REF(lep);
}
}
/*
* sctp_bindx(DELETE) for one address.
* assumes all arguments are valid/checked by caller.
*/
void
sctp_bindx_delete_address(struct sctp_inpcb *inp,
struct sockaddr *sa, uint32_t vrf_id, int *error)
{
struct sockaddr *addr_to_use;
#if defined(INET) && defined(INET6)
struct sockaddr_in6 *sin6;
struct sockaddr_in sin;
#endif
#ifdef SCTP_MVRF
int i;
#endif
/* see if we're bound all already! */
if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
*error = EINVAL;
return;
}
#ifdef SCTP_MVRF
/* Is the VRF one we have */
for (i = 0; i < inp->num_vrfs; i++) {
if (vrf_id == inp->m_vrf_ids[i]) {
break;
}
}
if (i == inp->num_vrfs) {
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
*error = EINVAL;
return;
}
#endif
switch (sa->sa_family) {
#ifdef INET6
case AF_INET6:
#ifdef HAVE_SA_LEN
if (sa->sa_len != sizeof(struct sockaddr_in6)) {
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
*error = EINVAL;
return;
}
#endif
if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
/* can only bind v6 on PF_INET6 sockets */
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
*error = EINVAL;
return;
}
#ifdef INET
sin6 = (struct sockaddr_in6 *)sa;
if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
SCTP_IPV6_V6ONLY(inp)) {
/* can't bind mapped-v4 on PF_INET sockets */
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
*error = EINVAL;
return;
}
in6_sin6_2_sin(&sin, sin6);
addr_to_use = (struct sockaddr *)&sin;
} else {
addr_to_use = sa;
}
#else
addr_to_use = sa;
#endif
break;
#endif
#ifdef INET
case AF_INET:
#ifdef HAVE_SA_LEN
if (sa->sa_len != sizeof(struct sockaddr_in)) {
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
*error = EINVAL;
return;
}
#endif
if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
SCTP_IPV6_V6ONLY(inp)) {
/* can't bind v4 on PF_INET sockets */
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
*error = EINVAL;
return;
}
addr_to_use = sa;
break;
#endif
default:
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
*error = EINVAL;
return;
}
/* No lock required mgmt_ep_sa does its own locking. */
*error = sctp_addr_mgmt_ep_sa(inp, addr_to_use, SCTP_DEL_IP_ADDRESS,
vrf_id);
}
/*
* returns the valid local address count for an assoc, taking into account
* all scoping rules
*/
int
sctp_local_addr_count(struct sctp_tcb *stcb)
{
int loopback_scope;
#if defined(INET)
int ipv4_local_scope, ipv4_addr_legal;
#endif
#if defined(INET6)
int local_scope, site_scope, ipv6_addr_legal;
#endif
#if defined(__Userspace__)
int conn_addr_legal;
#endif
struct sctp_vrf *vrf;
struct sctp_ifn *sctp_ifn;
struct sctp_ifa *sctp_ifa;
int count = 0;
/* Turn on all the appropriate scopes */
loopback_scope = stcb->asoc.scope.loopback_scope;
#if defined(INET)
ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope;
ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal;
#endif
#if defined(INET6)
local_scope = stcb->asoc.scope.local_scope;
site_scope = stcb->asoc.scope.site_scope;
ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal;
#endif
#if defined(__Userspace__)
conn_addr_legal = stcb->asoc.scope.conn_addr_legal;
#endif
SCTP_IPI_ADDR_RLOCK();
vrf = sctp_find_vrf(stcb->asoc.vrf_id);
if (vrf == NULL) {
/* no vrf, no addresses */
SCTP_IPI_ADDR_RUNLOCK();
return (0);
}
if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
/*
* bound all case: go through all ifns on the vrf
*/
LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
if ((loopback_scope == 0) &&
SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
continue;
}
LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
if (sctp_is_addr_restricted(stcb, sctp_ifa))
continue;
switch (sctp_ifa->address.sa.sa_family) {
#ifdef INET
case AF_INET:
if (ipv4_addr_legal) {
struct sockaddr_in *sin;
sin = &sctp_ifa->address.sin;
if (sin->sin_addr.s_addr == 0) {
/* skip unspecified addrs */
continue;
}
#if defined(__FreeBSD__) && !defined(__Userspace__)
if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred,
&sin->sin_addr) != 0) {
continue;
}
#endif
if ((ipv4_local_scope == 0) &&
(IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
continue;
}
/* count this one */
count++;
} else {
continue;
}
break;
#endif
#ifdef INET6
case AF_INET6:
if (ipv6_addr_legal) {
struct sockaddr_in6 *sin6;
#if defined(SCTP_EMBEDDED_V6_SCOPE) && !defined(SCTP_KAME)
struct sockaddr_in6 lsa6;
#endif
sin6 = &sctp_ifa->address.sin6;
if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
continue;
}
#if defined(__FreeBSD__) && !defined(__Userspace__)
if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred,
&sin6->sin6_addr) != 0) {
continue;
}
#endif
if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
if (local_scope == 0)
continue;
#if defined(SCTP_EMBEDDED_V6_SCOPE)
if (sin6->sin6_scope_id == 0) {
#ifdef SCTP_KAME
if (sa6_recoverscope(sin6) != 0)
/*
* bad link
* local
* address
*/
continue;
#else
lsa6 = *sin6;
if (in6_recoverscope(&lsa6,
&lsa6.sin6_addr,
NULL))
/*
* bad link
* local
* address
*/
continue;
sin6 = &lsa6;
#endif /* SCTP_KAME */
}
#endif /* SCTP_EMBEDDED_V6_SCOPE */
}
if ((site_scope == 0) &&
(IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
continue;
}
/* count this one */
count++;
}
break;
#endif
#if defined(__Userspace__)
case AF_CONN:
if (conn_addr_legal) {
count++;
}
break;
#endif
default:
/* TSNH */
break;
}
}
}
} else {
/*
* subset bound case
*/
struct sctp_laddr *laddr;
LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list,
sctp_nxt_addr) {
if (sctp_is_addr_restricted(stcb, laddr->ifa)) {
continue;
}
/* count this one */
count++;
}
}
SCTP_IPI_ADDR_RUNLOCK();
return (count);
}
#if defined(SCTP_LOCAL_TRACE_BUF)
void
sctp_log_trace(uint32_t subsys, const char *str SCTP_UNUSED, uint32_t a, uint32_t b, uint32_t c, uint32_t d, uint32_t e, uint32_t f)
{
uint32_t saveindex, newindex;
#if defined(_WIN32) && !defined(__Userspace__)
if (SCTP_BASE_SYSCTL(sctp_log) == NULL) {
return;
}
do {
saveindex = SCTP_BASE_SYSCTL(sctp_log)->index;
if (saveindex >= SCTP_MAX_LOGGING_SIZE) {
newindex = 1;
} else {
newindex = saveindex + 1;
}
} while (atomic_cmpset_int(&SCTP_BASE_SYSCTL(sctp_log)->index, saveindex, newindex) == 0);
if (saveindex >= SCTP_MAX_LOGGING_SIZE) {
saveindex = 0;
}
SCTP_BASE_SYSCTL(sctp_log)->entry[saveindex].timestamp = SCTP_GET_CYCLECOUNT;
SCTP_BASE_SYSCTL(sctp_log)->entry[saveindex].subsys = subsys;
SCTP_BASE_SYSCTL(sctp_log)->entry[saveindex].params[0] = a;
SCTP_BASE_SYSCTL(sctp_log)->entry[saveindex].params[1] = b;
SCTP_BASE_SYSCTL(sctp_log)->entry[saveindex].params[2] = c;
SCTP_BASE_SYSCTL(sctp_log)->entry[saveindex].params[3] = d;
SCTP_BASE_SYSCTL(sctp_log)->entry[saveindex].params[4] = e;
SCTP_BASE_SYSCTL(sctp_log)->entry[saveindex].params[5] = f;
#else
do {
saveindex = SCTP_BASE_SYSCTL(sctp_log).index;
if (saveindex >= SCTP_MAX_LOGGING_SIZE) {
newindex = 1;
} else {
newindex = saveindex + 1;
}
} while (atomic_cmpset_int(&SCTP_BASE_SYSCTL(sctp_log).index, saveindex, newindex) == 0);
if (saveindex >= SCTP_MAX_LOGGING_SIZE) {
saveindex = 0;
}
SCTP_BASE_SYSCTL(sctp_log).entry[saveindex].timestamp = SCTP_GET_CYCLECOUNT;
SCTP_BASE_SYSCTL(sctp_log).entry[saveindex].subsys = subsys;
SCTP_BASE_SYSCTL(sctp_log).entry[saveindex].params[0] = a;
SCTP_BASE_SYSCTL(sctp_log).entry[saveindex].params[1] = b;
SCTP_BASE_SYSCTL(sctp_log).entry[saveindex].params[2] = c;
SCTP_BASE_SYSCTL(sctp_log).entry[saveindex].params[3] = d;
SCTP_BASE_SYSCTL(sctp_log).entry[saveindex].params[4] = e;
SCTP_BASE_SYSCTL(sctp_log).entry[saveindex].params[5] = f;
#endif
}
#endif
#if defined(__FreeBSD__) && !defined(__Userspace__)
static void
sctp_recv_udp_tunneled_packet(struct mbuf *m, int off, struct inpcb *inp,
const struct sockaddr *sa SCTP_UNUSED, void *ctx SCTP_UNUSED)
{
struct ip *iph;
#ifdef INET6
struct ip6_hdr *ip6;
#endif
struct mbuf *sp, *last;
struct udphdr *uhdr;
uint16_t port;
if ((m->m_flags & M_PKTHDR) == 0) {
/* Can't handle one that is not a pkt hdr */
goto out;
}
/* Pull the src port */
iph = mtod(m, struct ip *);
uhdr = (struct udphdr *)((caddr_t)iph + off);
port = uhdr->uh_sport;
/* Split out the mbuf chain. Leave the
* IP header in m, place the
* rest in the sp.
*/
sp = m_split(m, off, M_NOWAIT);
if (sp == NULL) {
/* Gak, drop packet, we can't do a split */
goto out;
}
if (sp->m_pkthdr.len < sizeof(struct udphdr) + sizeof(struct sctphdr)) {
/* Gak, packet can't have an SCTP header in it - too small */
m_freem(sp);
goto out;
}
/* Now pull up the UDP header and SCTP header together */
sp = m_pullup(sp, sizeof(struct udphdr) + sizeof(struct sctphdr));
if (sp == NULL) {
/* Gak pullup failed */
goto out;
}
/* Trim out the UDP header */
m_adj(sp, sizeof(struct udphdr));
/* Now reconstruct the mbuf chain */
for (last = m; last->m_next; last = last->m_next);
last->m_next = sp;
m->m_pkthdr.len += sp->m_pkthdr.len;
/*
* The CSUM_DATA_VALID flags indicates that the HW checked the
* UDP checksum and it was valid.
* Since CSUM_DATA_VALID == CSUM_SCTP_VALID this would imply that
* the HW also verified the SCTP checksum. Therefore, clear the bit.
*/
SCTPDBG(SCTP_DEBUG_CRCOFFLOAD,
"sctp_recv_udp_tunneled_packet(): Packet of length %d received on %s with csum_flags 0x%b.\n",
m->m_pkthdr.len,
if_name(m->m_pkthdr.rcvif),
(int)m->m_pkthdr.csum_flags, CSUM_BITS);
m->m_pkthdr.csum_flags &= ~CSUM_DATA_VALID;
iph = mtod(m, struct ip *);
switch (iph->ip_v) {
#ifdef INET
case IPVERSION:
iph->ip_len = htons(ntohs(iph->ip_len) - sizeof(struct udphdr));
sctp_input_with_port(m, off, port);
break;
#endif
#ifdef INET6
case IPV6_VERSION >> 4:
ip6 = mtod(m, struct ip6_hdr *);
ip6->ip6_plen = htons(ntohs(ip6->ip6_plen) - sizeof(struct udphdr));
sctp6_input_with_port(&m, &off, port);
break;
#endif
default:
goto out;
break;
}
return;
out:
m_freem(m);
}
#ifdef INET
static void
sctp_recv_icmp_tunneled_packet(int cmd, struct sockaddr *sa, void *vip, void *ctx SCTP_UNUSED)
{
struct ip *outer_ip, *inner_ip;
struct sctphdr *sh;
struct icmp *icmp;
struct udphdr *udp;
struct sctp_inpcb *inp;
struct sctp_tcb *stcb;
struct sctp_nets *net;
struct sctp_init_chunk *ch;
struct sockaddr_in src, dst;
uint8_t type, code;
inner_ip = (struct ip *)vip;
icmp = (struct icmp *)((caddr_t)inner_ip -
(sizeof(struct icmp) - sizeof(struct ip)));
outer_ip = (struct ip *)((caddr_t)icmp - sizeof(struct ip));
if (ntohs(outer_ip->ip_len) <
sizeof(struct ip) + 8 + (inner_ip->ip_hl << 2) + sizeof(struct udphdr) + 8) {
return;
}
udp = (struct udphdr *)((caddr_t)inner_ip + (inner_ip->ip_hl << 2));
sh = (struct sctphdr *)(udp + 1);
memset(&src, 0, sizeof(struct sockaddr_in));
src.sin_family = AF_INET;
#ifdef HAVE_SIN_LEN
src.sin_len = sizeof(struct sockaddr_in);
#endif
src.sin_port = sh->src_port;
src.sin_addr = inner_ip->ip_src;
memset(&dst, 0, sizeof(struct sockaddr_in));
dst.sin_family = AF_INET;
#ifdef HAVE_SIN_LEN
dst.sin_len = sizeof(struct sockaddr_in);
#endif
dst.sin_port = sh->dest_port;
dst.sin_addr = inner_ip->ip_dst;
/*
* 'dst' holds the dest of the packet that failed to be sent.
* 'src' holds our local endpoint address. Thus we reverse
* the dst and the src in the lookup.
*/
inp = NULL;
net = NULL;
stcb = sctp_findassociation_addr_sa((struct sockaddr *)&dst,
(struct sockaddr *)&src,
&inp, &net, 1,
SCTP_DEFAULT_VRFID);
if ((stcb != NULL) &&
(net != NULL) &&
(inp != NULL)) {
/* Check the UDP port numbers */
if ((udp->uh_dport != net->port) ||
(udp->uh_sport != htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)))) {
SCTP_TCB_UNLOCK(stcb);
return;
}
/* Check the verification tag */
if (ntohl(sh->v_tag) != 0) {
/*
* This must be the verification tag used
* for sending out packets. We don't
* consider packets reflecting the
* verification tag.
*/
if (ntohl(sh->v_tag) != stcb->asoc.peer_vtag) {
SCTP_TCB_UNLOCK(stcb);
return;
}
} else {
if (ntohs(outer_ip->ip_len) >=
sizeof(struct ip) +
8 + (inner_ip->ip_hl << 2) + 8 + 20) {
/*
* In this case we can check if we
* got an INIT chunk and if the
* initiate tag matches.
*/
ch = (struct sctp_init_chunk *)(sh + 1);
if ((ch->ch.chunk_type != SCTP_INITIATION) ||
(ntohl(ch->init.initiate_tag) != stcb->asoc.my_vtag)) {
SCTP_TCB_UNLOCK(stcb);
return;
}
} else {
SCTP_TCB_UNLOCK(stcb);
return;
}
}
type = icmp->icmp_type;
code = icmp->icmp_code;
if ((type == ICMP_UNREACH) &&
(code == ICMP_UNREACH_PORT)) {
code = ICMP_UNREACH_PROTOCOL;
}
sctp_notify(inp, stcb, net, type, code,
ntohs(inner_ip->ip_len),
(uint32_t)ntohs(icmp->icmp_nextmtu));
#if defined(__Userspace__)
if (!(stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) &&
(stcb->sctp_socket != NULL)) {
struct socket *upcall_socket;
upcall_socket = stcb->sctp_socket;
SOCK_LOCK(upcall_socket);
soref(upcall_socket);
SOCK_UNLOCK(upcall_socket);
if ((upcall_socket->so_upcall != NULL) &&
(upcall_socket->so_error != 0)) {
(*upcall_socket->so_upcall)(upcall_socket, upcall_socket->so_upcallarg, M_NOWAIT);
}
ACCEPT_LOCK();
SOCK_LOCK(upcall_socket);
sorele(upcall_socket);
}
#endif
} else {
if ((stcb == NULL) && (inp != NULL)) {
/* reduce ref-count */
SCTP_INP_WLOCK(inp);
SCTP_INP_DECR_REF(inp);
SCTP_INP_WUNLOCK(inp);
}
if (stcb) {
SCTP_TCB_UNLOCK(stcb);
}
}
return;
}
#endif
#ifdef INET6
static void
sctp_recv_icmp6_tunneled_packet(int cmd, struct sockaddr *sa, void *d, void *ctx SCTP_UNUSED)
{
struct ip6ctlparam *ip6cp;
struct sctp_inpcb *inp;
struct sctp_tcb *stcb;
struct sctp_nets *net;
struct sctphdr sh;
struct udphdr udp;
struct sockaddr_in6 src, dst;
uint8_t type, code;
ip6cp = (struct ip6ctlparam *)d;
/*
* XXX: We assume that when IPV6 is non NULL, M and OFF are
* valid.
*/
if (ip6cp->ip6c_m == NULL) {
return;
}
/* Check if we can safely examine the ports and the
* verification tag of the SCTP common header.
*/
if (ip6cp->ip6c_m->m_pkthdr.len <
ip6cp->ip6c_off + sizeof(struct udphdr)+ offsetof(struct sctphdr, checksum)) {
return;
}
/* Copy out the UDP header. */
memset(&udp, 0, sizeof(struct udphdr));
m_copydata(ip6cp->ip6c_m,
ip6cp->ip6c_off,
sizeof(struct udphdr),
(caddr_t)&udp);
/* Copy out the port numbers and the verification tag. */
memset(&sh, 0, sizeof(struct sctphdr));
m_copydata(ip6cp->ip6c_m,
ip6cp->ip6c_off + sizeof(struct udphdr),
sizeof(uint16_t) + sizeof(uint16_t) + sizeof(uint32_t),
(caddr_t)&sh);
memset(&src, 0, sizeof(struct sockaddr_in6));
src.sin6_family = AF_INET6;
#ifdef HAVE_SIN6_LEN
src.sin6_len = sizeof(struct sockaddr_in6);
#endif
src.sin6_port = sh.src_port;
src.sin6_addr = ip6cp->ip6c_ip6->ip6_src;
#if defined(__FreeBSD__) && !defined(__Userspace__)
if (in6_setscope(&src.sin6_addr, ip6cp->ip6c_m->m_pkthdr.rcvif, NULL) != 0) {
return;
}
#endif
memset(&dst, 0, sizeof(struct sockaddr_in6));
dst.sin6_family = AF_INET6;
#ifdef HAVE_SIN6_LEN
dst.sin6_len = sizeof(struct sockaddr_in6);
#endif
dst.sin6_port = sh.dest_port;
dst.sin6_addr = ip6cp->ip6c_ip6->ip6_dst;
#if defined(__FreeBSD__) && !defined(__Userspace__)
if (in6_setscope(&dst.sin6_addr, ip6cp->ip6c_m->m_pkthdr.rcvif, NULL) != 0) {
return;
}
#endif
inp = NULL;
net = NULL;
stcb = sctp_findassociation_addr_sa((struct sockaddr *)&dst,
(struct sockaddr *)&src,
&inp, &net, 1, SCTP_DEFAULT_VRFID);
if ((stcb != NULL) &&
(net != NULL) &&
(inp != NULL)) {
/* Check the UDP port numbers */
if ((udp.uh_dport != net->port) ||
(udp.uh_sport != htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)))) {
SCTP_TCB_UNLOCK(stcb);
return;
}
/* Check the verification tag */
if (ntohl(sh.v_tag) != 0) {
/*
* This must be the verification tag used for
* sending out packets. We don't consider
* packets reflecting the verification tag.
*/
if (ntohl(sh.v_tag) != stcb->asoc.peer_vtag) {
SCTP_TCB_UNLOCK(stcb);
return;
}
} else {
#if defined(__FreeBSD__) && !defined(__Userspace__)
if (ip6cp->ip6c_m->m_pkthdr.len >=
ip6cp->ip6c_off + sizeof(struct udphdr) +
sizeof(struct sctphdr) +
sizeof(struct sctp_chunkhdr) +
offsetof(struct sctp_init, a_rwnd)) {
/*
* In this case we can check if we
* got an INIT chunk and if the
* initiate tag matches.
*/
uint32_t initiate_tag;
uint8_t chunk_type;
m_copydata(ip6cp->ip6c_m,
ip6cp->ip6c_off +
sizeof(struct udphdr) +
sizeof(struct sctphdr),
sizeof(uint8_t),
(caddr_t)&chunk_type);
m_copydata(ip6cp->ip6c_m,
ip6cp->ip6c_off +
sizeof(struct udphdr) +
sizeof(struct sctphdr) +
sizeof(struct sctp_chunkhdr),
sizeof(uint32_t),
(caddr_t)&initiate_tag);
if ((chunk_type != SCTP_INITIATION) ||
(ntohl(initiate_tag) != stcb->asoc.my_vtag)) {
SCTP_TCB_UNLOCK(stcb);
return;
}
} else {
SCTP_TCB_UNLOCK(stcb);
return;
}
#else
SCTP_TCB_UNLOCK(stcb);
return;
#endif
}
type = ip6cp->ip6c_icmp6->icmp6_type;
code = ip6cp->ip6c_icmp6->icmp6_code;
if ((type == ICMP6_DST_UNREACH) &&
(code == ICMP6_DST_UNREACH_NOPORT)) {
type = ICMP6_PARAM_PROB;
code = ICMP6_PARAMPROB_NEXTHEADER;
}
sctp6_notify(inp, stcb, net, type, code,
ntohl(ip6cp->ip6c_icmp6->icmp6_mtu));
#if defined(__Userspace__)
if (!(stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) &&
(stcb->sctp_socket != NULL)) {
struct socket *upcall_socket;
upcall_socket = stcb->sctp_socket;
SOCK_LOCK(upcall_socket);
soref(upcall_socket);
SOCK_UNLOCK(upcall_socket);
if ((upcall_socket->so_upcall != NULL) &&
(upcall_socket->so_error != 0)) {
(*upcall_socket->so_upcall)(upcall_socket, upcall_socket->so_upcallarg, M_NOWAIT);
}
ACCEPT_LOCK();
SOCK_LOCK(upcall_socket);
sorele(upcall_socket);
}
#endif
} else {
if ((stcb == NULL) && (inp != NULL)) {
/* reduce inp's ref-count */
SCTP_INP_WLOCK(inp);
SCTP_INP_DECR_REF(inp);
SCTP_INP_WUNLOCK(inp);
}
if (stcb) {
SCTP_TCB_UNLOCK(stcb);
}
}
}
#endif
void
sctp_over_udp_stop(void)
{
/*
* This function assumes sysctl caller holds sctp_sysctl_info_lock() for writting!
*/
#ifdef INET
if (SCTP_BASE_INFO(udp4_tun_socket) != NULL) {
soclose(SCTP_BASE_INFO(udp4_tun_socket));
SCTP_BASE_INFO(udp4_tun_socket) = NULL;
}
#endif
#ifdef INET6
if (SCTP_BASE_INFO(udp6_tun_socket) != NULL) {
soclose(SCTP_BASE_INFO(udp6_tun_socket));
SCTP_BASE_INFO(udp6_tun_socket) = NULL;
}
#endif
}
int
sctp_over_udp_start(void)
{
uint16_t port;
int ret;
#ifdef INET
struct sockaddr_in sin;
#endif
#ifdef INET6
struct sockaddr_in6 sin6;
#endif
/*
* This function assumes sysctl caller holds sctp_sysctl_info_lock() for writting!
*/
port = SCTP_BASE_SYSCTL(sctp_udp_tunneling_port);
if (ntohs(port) == 0) {
/* Must have a port set */
return (EINVAL);
}
#ifdef INET
if (SCTP_BASE_INFO(udp4_tun_socket) != NULL) {
/* Already running -- must stop first */
return (EALREADY);
}
#endif
#ifdef INET6
if (SCTP_BASE_INFO(udp6_tun_socket) != NULL) {
/* Already running -- must stop first */
return (EALREADY);
}
#endif
#ifdef INET
if ((ret = socreate(PF_INET, &SCTP_BASE_INFO(udp4_tun_socket),
SOCK_DGRAM, IPPROTO_UDP,
curthread->td_ucred, curthread))) {
sctp_over_udp_stop();
return (ret);
}
/* Call the special UDP hook. */
if ((ret = udp_set_kernel_tunneling(SCTP_BASE_INFO(udp4_tun_socket),
sctp_recv_udp_tunneled_packet,
sctp_recv_icmp_tunneled_packet,
NULL))) {
sctp_over_udp_stop();
return (ret);
}
/* Ok, we have a socket, bind it to the port. */
memset(&sin, 0, sizeof(struct sockaddr_in));
sin.sin_len = sizeof(struct sockaddr_in);
sin.sin_family = AF_INET;
sin.sin_port = htons(port);
if ((ret = sobind(SCTP_BASE_INFO(udp4_tun_socket),
(struct sockaddr *)&sin, curthread))) {
sctp_over_udp_stop();
return (ret);
}
#endif
#ifdef INET6
if ((ret = socreate(PF_INET6, &SCTP_BASE_INFO(udp6_tun_socket),
SOCK_DGRAM, IPPROTO_UDP,
curthread->td_ucred, curthread))) {
sctp_over_udp_stop();
return (ret);
}
/* Call the special UDP hook. */
if ((ret = udp_set_kernel_tunneling(SCTP_BASE_INFO(udp6_tun_socket),
sctp_recv_udp_tunneled_packet,
sctp_recv_icmp6_tunneled_packet,
NULL))) {
sctp_over_udp_stop();
return (ret);
}
/* Ok, we have a socket, bind it to the port. */
memset(&sin6, 0, sizeof(struct sockaddr_in6));
sin6.sin6_len = sizeof(struct sockaddr_in6);
sin6.sin6_family = AF_INET6;
sin6.sin6_port = htons(port);
if ((ret = sobind(SCTP_BASE_INFO(udp6_tun_socket),
(struct sockaddr *)&sin6, curthread))) {
sctp_over_udp_stop();
return (ret);
}
#endif
return (0);
}
#endif
/*
* sctp_min_mtu ()returns the minimum of all non-zero arguments.
* If all arguments are zero, zero is returned.
*/
uint32_t
sctp_min_mtu(uint32_t mtu1, uint32_t mtu2, uint32_t mtu3)
{
if (mtu1 > 0) {
if (mtu2 > 0) {
if (mtu3 > 0) {
return (min(mtu1, min(mtu2, mtu3)));
} else {
return (min(mtu1, mtu2));
}
} else {
if (mtu3 > 0) {
return (min(mtu1, mtu3));
} else {
return (mtu1);
}
}
} else {
if (mtu2 > 0) {
if (mtu3 > 0) {
return (min(mtu2, mtu3));
} else {
return (mtu2);
}
} else {
return (mtu3);
}
}
}
#if defined(__FreeBSD__) && !defined(__Userspace__)
void
sctp_hc_set_mtu(union sctp_sockstore *addr, uint16_t fibnum, uint32_t mtu)
{
struct in_conninfo inc;
memset(&inc, 0, sizeof(struct in_conninfo));
inc.inc_fibnum = fibnum;
switch (addr->sa.sa_family) {
#ifdef INET
case AF_INET:
inc.inc_faddr = addr->sin.sin_addr;
break;
#endif
#ifdef INET6
case AF_INET6:
inc.inc_flags |= INC_ISIPV6;
inc.inc6_faddr = addr->sin6.sin6_addr;
break;
#endif
default:
return;
}
tcp_hc_updatemtu(&inc, (u_long)mtu);
}
uint32_t
sctp_hc_get_mtu(union sctp_sockstore *addr, uint16_t fibnum)
{
struct in_conninfo inc;
memset(&inc, 0, sizeof(struct in_conninfo));
inc.inc_fibnum = fibnum;
switch (addr->sa.sa_family) {
#ifdef INET
case AF_INET:
inc.inc_faddr = addr->sin.sin_addr;
break;
#endif
#ifdef INET6
case AF_INET6:
inc.inc_flags |= INC_ISIPV6;
inc.inc6_faddr = addr->sin6.sin6_addr;
break;
#endif
default:
return (0);
}
return ((uint32_t)tcp_hc_getmtu(&inc));
}
#endif
void
sctp_set_state(struct sctp_tcb *stcb, int new_state)
{
#if defined(KDTRACE_HOOKS)
int old_state = stcb->asoc.state;
#endif
KASSERT((new_state & ~SCTP_STATE_MASK) == 0,
("sctp_set_state: Can't set substate (new_state = %x)",
new_state));
stcb->asoc.state = (stcb->asoc.state & ~SCTP_STATE_MASK) | new_state;
if ((new_state == SCTP_STATE_SHUTDOWN_RECEIVED) ||
(new_state == SCTP_STATE_SHUTDOWN_SENT) ||
(new_state == SCTP_STATE_SHUTDOWN_ACK_SENT)) {
SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_SHUTDOWN_PENDING);
}
#if defined(KDTRACE_HOOKS)
if (((old_state & SCTP_STATE_MASK) != new_state) &&
!(((old_state & SCTP_STATE_MASK) == SCTP_STATE_EMPTY) &&
(new_state == SCTP_STATE_INUSE))) {
SCTP_PROBE6(state__change, NULL, stcb, NULL, stcb, NULL, old_state);
}
#endif
}
void
sctp_add_substate(struct sctp_tcb *stcb, int substate)
{
#if defined(KDTRACE_HOOKS)
int old_state = stcb->asoc.state;
#endif
KASSERT((substate & SCTP_STATE_MASK) == 0,
("sctp_add_substate: Can't set state (substate = %x)",
substate));
stcb->asoc.state |= substate;
#if defined(KDTRACE_HOOKS)
if (((substate & SCTP_STATE_ABOUT_TO_BE_FREED) &&
((old_state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) ||
((substate & SCTP_STATE_SHUTDOWN_PENDING) &&
((old_state & SCTP_STATE_SHUTDOWN_PENDING) == 0))) {
SCTP_PROBE6(state__change, NULL, stcb, NULL, stcb, NULL, old_state);
}
#endif
}
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