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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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f4538e24b6
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>
612 lines
17 KiB
C
612 lines
17 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved.
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* Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
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* Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* a) Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* b) Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the distribution.
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*
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* c) Neither the name of Cisco Systems, Inc. nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#if defined(__FreeBSD__) && !defined(__Userspace__)
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD: head/sys/netinet/sctp_header.h 309682 2016-12-07 19:30:59Z tuexen $");
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#endif
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#ifndef _NETINET_SCTP_HEADER_H_
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#define _NETINET_SCTP_HEADER_H_
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#if defined(_WIN32) && !defined(__Userspace__)
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#include <packon.h>
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#endif
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#if !defined(_WIN32)
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#include <sys/time.h>
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#endif
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#include <netinet/sctp.h>
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#include <netinet/sctp_constants.h>
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#if !defined(_WIN32)
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#define SCTP_PACKED __attribute__((packed))
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#else
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#pragma pack (push, 1)
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#define SCTP_PACKED
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#endif
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/*
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* Parameter structures
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*/
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struct sctp_ipv4addr_param {
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struct sctp_paramhdr ph;/* type=SCTP_IPV4_PARAM_TYPE, len=8 */
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uint32_t addr; /* IPV4 address */
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} SCTP_PACKED;
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#define SCTP_V6_ADDR_BYTES 16
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struct sctp_ipv6addr_param {
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struct sctp_paramhdr ph;/* type=SCTP_IPV6_PARAM_TYPE, len=20 */
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uint8_t addr[SCTP_V6_ADDR_BYTES]; /* IPV6 address */
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} SCTP_PACKED;
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/* Cookie Preservative */
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struct sctp_cookie_perserve_param {
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struct sctp_paramhdr ph;/* type=SCTP_COOKIE_PRESERVE, len=8 */
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uint32_t time; /* time in ms to extend cookie */
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} SCTP_PACKED;
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#define SCTP_ARRAY_MIN_LEN 1
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/* Host Name Address */
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struct sctp_host_name_param {
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struct sctp_paramhdr ph;/* type=SCTP_HOSTNAME_ADDRESS */
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char name[SCTP_ARRAY_MIN_LEN]; /* host name */
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} SCTP_PACKED;
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/*
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* This is the maximum padded size of a s-a-p
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* so paramheadr + 3 address types (6 bytes) + 2 byte pad = 12
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*/
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#define SCTP_MAX_ADDR_PARAMS_SIZE 12
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/* supported address type */
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struct sctp_supported_addr_param {
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struct sctp_paramhdr ph;/* type=SCTP_SUPPORTED_ADDRTYPE */
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uint16_t addr_type[2]; /* array of supported address types */
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} SCTP_PACKED;
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/* heartbeat info parameter */
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struct sctp_heartbeat_info_param {
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struct sctp_paramhdr ph;
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uint32_t time_value_1;
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uint32_t time_value_2;
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uint32_t random_value1;
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uint32_t random_value2;
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uint8_t addr_family;
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uint8_t addr_len;
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/* make sure that this structure is 4 byte aligned */
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uint8_t padding[2];
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char address[SCTP_ADDRMAX];
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} SCTP_PACKED;
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/* draft-ietf-tsvwg-prsctp */
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/* PR-SCTP supported parameter */
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struct sctp_prsctp_supported_param {
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struct sctp_paramhdr ph;
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} SCTP_PACKED;
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/* draft-ietf-tsvwg-addip-sctp */
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struct sctp_asconf_paramhdr { /* an ASCONF "parameter" */
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struct sctp_paramhdr ph;/* a SCTP parameter header */
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uint32_t correlation_id;/* correlation id for this param */
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} SCTP_PACKED;
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struct sctp_asconf_addr_param { /* an ASCONF address parameter */
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struct sctp_asconf_paramhdr aph; /* asconf "parameter" */
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struct sctp_ipv6addr_param addrp; /* max storage size */
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} SCTP_PACKED;
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struct sctp_asconf_tag_param { /* an ASCONF NAT-Vtag parameter */
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struct sctp_asconf_paramhdr aph; /* asconf "parameter" */
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uint32_t local_vtag;
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uint32_t remote_vtag;
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} SCTP_PACKED;
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struct sctp_asconf_addrv4_param { /* an ASCONF address (v4) parameter */
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struct sctp_asconf_paramhdr aph; /* asconf "parameter" */
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struct sctp_ipv4addr_param addrp; /* max storage size */
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} SCTP_PACKED;
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#define SCTP_MAX_SUPPORTED_EXT 256
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struct sctp_supported_chunk_types_param {
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struct sctp_paramhdr ph;/* type = 0x8008 len = x */
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uint8_t chunk_types[];
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} SCTP_PACKED;
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/*
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* Structures for DATA chunks
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*/
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struct sctp_data {
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uint32_t tsn;
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uint16_t sid;
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uint16_t ssn;
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uint32_t ppid;
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/* user data follows */
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} SCTP_PACKED;
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struct sctp_data_chunk {
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struct sctp_chunkhdr ch;
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struct sctp_data dp;
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} SCTP_PACKED;
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struct sctp_idata {
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uint32_t tsn;
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uint16_t sid;
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uint16_t reserved; /* Where does the SSN go? */
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uint32_t mid;
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union {
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uint32_t ppid;
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uint32_t fsn; /* Fragment Sequence Number */
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} ppid_fsn;
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/* user data follows */
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} SCTP_PACKED;
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struct sctp_idata_chunk {
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struct sctp_chunkhdr ch;
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struct sctp_idata dp;
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} SCTP_PACKED;
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/*
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* Structures for the control chunks
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*/
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/* Initiate (INIT)/Initiate Ack (INIT ACK) */
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struct sctp_init {
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uint32_t initiate_tag; /* initiate tag */
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uint32_t a_rwnd; /* a_rwnd */
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uint16_t num_outbound_streams; /* OS */
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uint16_t num_inbound_streams; /* MIS */
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uint32_t initial_tsn; /* I-TSN */
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/* optional param's follow */
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} SCTP_PACKED;
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#define SCTP_IDENTIFICATION_SIZE 16
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#define SCTP_ADDRESS_SIZE 4
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#if defined(__Userspace__)
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#define SCTP_RESERVE_SPACE 5
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#else
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#define SCTP_RESERVE_SPACE 6
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#endif
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/* state cookie header */
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struct sctp_state_cookie { /* this is our definition... */
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uint8_t identification[SCTP_IDENTIFICATION_SIZE];/* id of who we are */
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struct timeval time_entered; /* the time I built cookie */
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uint32_t cookie_life; /* life I will award this cookie */
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uint32_t tie_tag_my_vtag; /* my tag in old association */
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uint32_t tie_tag_peer_vtag; /* peers tag in old association */
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uint32_t peers_vtag; /* peers tag in INIT (for quick ref) */
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uint32_t my_vtag; /* my tag in INIT-ACK (for quick ref) */
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uint32_t address[SCTP_ADDRESS_SIZE]; /* 4 ints/128 bits */
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uint32_t addr_type; /* address type */
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uint32_t laddress[SCTP_ADDRESS_SIZE]; /* my local from address */
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uint32_t laddr_type; /* my local from address type */
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uint32_t scope_id; /* v6 scope id for link-locals */
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uint16_t peerport; /* port address of the peer in the INIT */
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uint16_t myport; /* my port address used in the INIT */
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uint8_t ipv4_addr_legal;/* Are V4 addr legal? */
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uint8_t ipv6_addr_legal;/* Are V6 addr legal? */
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#if defined(__Userspace__)
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uint8_t conn_addr_legal;
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#endif
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uint8_t local_scope; /* IPv6 local scope flag */
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uint8_t site_scope; /* IPv6 site scope flag */
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uint8_t ipv4_scope; /* IPv4 private addr scope */
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uint8_t loopback_scope; /* loopback scope information */
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uint8_t reserved[SCTP_RESERVE_SPACE]; /* Align to 64 bits */
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/*
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* at the end is tacked on the INIT chunk and the INIT-ACK chunk
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* (minus the cookie).
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*/
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} SCTP_PACKED;
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/* state cookie parameter */
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struct sctp_state_cookie_param {
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struct sctp_paramhdr ph;
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struct sctp_state_cookie cookie;
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} SCTP_PACKED;
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struct sctp_init_chunk {
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struct sctp_chunkhdr ch;
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struct sctp_init init;
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} SCTP_PACKED;
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struct sctp_init_msg {
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struct sctphdr sh;
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struct sctp_init_chunk msg;
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} SCTP_PACKED;
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/* ... used for both INIT and INIT ACK */
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#define sctp_init_ack sctp_init
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#define sctp_init_ack_chunk sctp_init_chunk
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#define sctp_init_ack_msg sctp_init_msg
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/* Selective Ack (SACK) */
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struct sctp_gap_ack_block {
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uint16_t start; /* Gap Ack block start */
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uint16_t end; /* Gap Ack block end */
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} SCTP_PACKED;
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struct sctp_sack {
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uint32_t cum_tsn_ack; /* cumulative TSN Ack */
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uint32_t a_rwnd; /* updated a_rwnd of sender */
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uint16_t num_gap_ack_blks; /* number of Gap Ack blocks */
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uint16_t num_dup_tsns; /* number of duplicate TSNs */
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/* struct sctp_gap_ack_block's follow */
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/* uint32_t duplicate_tsn's follow */
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} SCTP_PACKED;
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struct sctp_sack_chunk {
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struct sctp_chunkhdr ch;
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struct sctp_sack sack;
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} SCTP_PACKED;
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struct sctp_nr_sack {
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uint32_t cum_tsn_ack; /* cumulative TSN Ack */
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uint32_t a_rwnd; /* updated a_rwnd of sender */
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uint16_t num_gap_ack_blks; /* number of Gap Ack blocks */
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uint16_t num_nr_gap_ack_blks; /* number of NR Gap Ack blocks */
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uint16_t num_dup_tsns; /* number of duplicate TSNs */
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uint16_t reserved; /* not currently used*/
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/* struct sctp_gap_ack_block's follow */
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/* uint32_t duplicate_tsn's follow */
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} SCTP_PACKED;
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struct sctp_nr_sack_chunk {
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struct sctp_chunkhdr ch;
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struct sctp_nr_sack nr_sack;
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} SCTP_PACKED;
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/* Heartbeat Request (HEARTBEAT) */
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struct sctp_heartbeat {
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struct sctp_heartbeat_info_param hb_info;
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} SCTP_PACKED;
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struct sctp_heartbeat_chunk {
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struct sctp_chunkhdr ch;
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struct sctp_heartbeat heartbeat;
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} SCTP_PACKED;
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/* ... used for Heartbeat Ack (HEARTBEAT ACK) */
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#define sctp_heartbeat_ack sctp_heartbeat
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#define sctp_heartbeat_ack_chunk sctp_heartbeat_chunk
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/* Abort Asssociation (ABORT) */
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struct sctp_abort_chunk {
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struct sctp_chunkhdr ch;
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/* optional error cause may follow */
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} SCTP_PACKED;
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struct sctp_abort_msg {
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struct sctphdr sh;
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struct sctp_abort_chunk msg;
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} SCTP_PACKED;
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/* Shutdown Association (SHUTDOWN) */
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struct sctp_shutdown_chunk {
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struct sctp_chunkhdr ch;
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uint32_t cumulative_tsn_ack;
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} SCTP_PACKED;
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/* Shutdown Acknowledgment (SHUTDOWN ACK) */
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struct sctp_shutdown_ack_chunk {
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struct sctp_chunkhdr ch;
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} SCTP_PACKED;
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/* Operation Error (ERROR) */
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struct sctp_error_chunk {
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struct sctp_chunkhdr ch;
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/* optional error causes follow */
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} SCTP_PACKED;
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/* Cookie Echo (COOKIE ECHO) */
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struct sctp_cookie_echo_chunk {
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struct sctp_chunkhdr ch;
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struct sctp_state_cookie cookie;
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} SCTP_PACKED;
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/* Cookie Acknowledgment (COOKIE ACK) */
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struct sctp_cookie_ack_chunk {
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struct sctp_chunkhdr ch;
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} SCTP_PACKED;
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/* Explicit Congestion Notification Echo (ECNE) */
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struct old_sctp_ecne_chunk {
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struct sctp_chunkhdr ch;
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uint32_t tsn;
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} SCTP_PACKED;
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struct sctp_ecne_chunk {
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struct sctp_chunkhdr ch;
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uint32_t tsn;
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uint32_t num_pkts_since_cwr;
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} SCTP_PACKED;
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/* Congestion Window Reduced (CWR) */
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struct sctp_cwr_chunk {
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struct sctp_chunkhdr ch;
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uint32_t tsn;
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} SCTP_PACKED;
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/* Shutdown Complete (SHUTDOWN COMPLETE) */
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struct sctp_shutdown_complete_chunk {
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struct sctp_chunkhdr ch;
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} SCTP_PACKED;
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struct sctp_adaptation_layer_indication {
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struct sctp_paramhdr ph;
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uint32_t indication;
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} SCTP_PACKED;
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/*
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* draft-ietf-tsvwg-addip-sctp
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*/
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/* Address/Stream Configuration Change (ASCONF) */
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struct sctp_asconf_chunk {
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struct sctp_chunkhdr ch;
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uint32_t serial_number;
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/* lookup address parameter (mandatory) */
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/* asconf parameters follow */
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} SCTP_PACKED;
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/* Address/Stream Configuration Acknowledge (ASCONF ACK) */
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struct sctp_asconf_ack_chunk {
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struct sctp_chunkhdr ch;
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uint32_t serial_number;
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/* asconf parameters follow */
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} SCTP_PACKED;
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/* draft-ietf-tsvwg-prsctp */
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/* Forward Cumulative TSN (FORWARD TSN) */
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struct sctp_forward_tsn_chunk {
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struct sctp_chunkhdr ch;
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uint32_t new_cumulative_tsn;
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/* stream/sequence pairs (sctp_strseq) follow */
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} SCTP_PACKED;
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struct sctp_strseq {
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uint16_t sid;
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uint16_t ssn;
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} SCTP_PACKED;
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struct sctp_strseq_mid {
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uint16_t sid;
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uint16_t flags;
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uint32_t mid;
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};
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struct sctp_forward_tsn_msg {
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struct sctphdr sh;
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struct sctp_forward_tsn_chunk msg;
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} SCTP_PACKED;
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/* should be a multiple of 4 - 1 aka 3/7/11 etc. */
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#define SCTP_NUM_DB_TO_VERIFY 31
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struct sctp_chunk_desc {
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uint8_t chunk_type;
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uint8_t data_bytes[SCTP_NUM_DB_TO_VERIFY];
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uint32_t tsn_ifany;
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} SCTP_PACKED;
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struct sctp_pktdrop_chunk {
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struct sctp_chunkhdr ch;
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uint32_t bottle_bw;
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uint32_t current_onq;
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uint16_t trunc_len;
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uint16_t reserved;
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uint8_t data[];
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} SCTP_PACKED;
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/**********STREAM RESET STUFF ******************/
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struct sctp_stream_reset_request {
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struct sctp_paramhdr ph;
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uint32_t request_seq;
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} SCTP_PACKED;
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struct sctp_stream_reset_out_request {
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struct sctp_paramhdr ph;
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uint32_t request_seq; /* monotonically increasing seq no */
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uint32_t response_seq; /* if a response, the resp seq no */
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uint32_t send_reset_at_tsn; /* last TSN I assigned outbound */
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uint16_t list_of_streams[]; /* if not all list of streams */
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} SCTP_PACKED;
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struct sctp_stream_reset_in_request {
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struct sctp_paramhdr ph;
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uint32_t request_seq;
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uint16_t list_of_streams[]; /* if not all list of streams */
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} SCTP_PACKED;
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struct sctp_stream_reset_tsn_request {
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struct sctp_paramhdr ph;
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uint32_t request_seq;
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} SCTP_PACKED;
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struct sctp_stream_reset_response {
|
|
struct sctp_paramhdr ph;
|
|
uint32_t response_seq; /* if a response, the resp seq no */
|
|
uint32_t result;
|
|
} SCTP_PACKED;
|
|
|
|
struct sctp_stream_reset_response_tsn {
|
|
struct sctp_paramhdr ph;
|
|
uint32_t response_seq; /* if a response, the resp seq no */
|
|
uint32_t result;
|
|
uint32_t senders_next_tsn;
|
|
uint32_t receivers_next_tsn;
|
|
} SCTP_PACKED;
|
|
|
|
struct sctp_stream_reset_add_strm {
|
|
struct sctp_paramhdr ph;
|
|
uint32_t request_seq;
|
|
uint16_t number_of_streams;
|
|
uint16_t reserved;
|
|
} SCTP_PACKED;
|
|
|
|
#define SCTP_STREAM_RESET_RESULT_NOTHING_TO_DO 0x00000000 /* XXX: unused */
|
|
#define SCTP_STREAM_RESET_RESULT_PERFORMED 0x00000001
|
|
#define SCTP_STREAM_RESET_RESULT_DENIED 0x00000002
|
|
#define SCTP_STREAM_RESET_RESULT_ERR__WRONG_SSN 0x00000003 /* XXX: unused */
|
|
#define SCTP_STREAM_RESET_RESULT_ERR_IN_PROGRESS 0x00000004
|
|
#define SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO 0x00000005
|
|
#define SCTP_STREAM_RESET_RESULT_IN_PROGRESS 0x00000006 /* XXX: unused */
|
|
|
|
/*
|
|
* convience structures, note that if you are making a request for specific
|
|
* streams then the request will need to be an overlay structure.
|
|
*/
|
|
|
|
struct sctp_stream_reset_tsn_req {
|
|
struct sctp_chunkhdr ch;
|
|
struct sctp_stream_reset_tsn_request sr_req;
|
|
} SCTP_PACKED;
|
|
|
|
struct sctp_stream_reset_resp {
|
|
struct sctp_chunkhdr ch;
|
|
struct sctp_stream_reset_response sr_resp;
|
|
} SCTP_PACKED;
|
|
|
|
/* respone only valid with a TSN request */
|
|
struct sctp_stream_reset_resp_tsn {
|
|
struct sctp_chunkhdr ch;
|
|
struct sctp_stream_reset_response_tsn sr_resp;
|
|
} SCTP_PACKED;
|
|
|
|
/****************************************************/
|
|
|
|
/*
|
|
* Authenticated chunks support draft-ietf-tsvwg-sctp-auth
|
|
*/
|
|
|
|
/* Should we make the max be 32? */
|
|
#define SCTP_RANDOM_MAX_SIZE 256
|
|
struct sctp_auth_random {
|
|
struct sctp_paramhdr ph;/* type = 0x8002 */
|
|
uint8_t random_data[];
|
|
} SCTP_PACKED;
|
|
|
|
struct sctp_auth_chunk_list {
|
|
struct sctp_paramhdr ph;/* type = 0x8003 */
|
|
uint8_t chunk_types[];
|
|
} SCTP_PACKED;
|
|
|
|
struct sctp_auth_hmac_algo {
|
|
struct sctp_paramhdr ph;/* type = 0x8004 */
|
|
uint16_t hmac_ids[];
|
|
} SCTP_PACKED;
|
|
|
|
struct sctp_auth_chunk {
|
|
struct sctp_chunkhdr ch;
|
|
uint16_t shared_key_id;
|
|
uint16_t hmac_id;
|
|
uint8_t hmac[];
|
|
} SCTP_PACKED;
|
|
|
|
/*
|
|
* we pre-reserve enough room for a ECNE or CWR AND a SACK with no missing
|
|
* pieces. If ENCE is missing we could have a couple of blocks. This way we
|
|
* optimize so we MOST likely can bundle a SACK/ECN with the smallest size
|
|
* data chunk I will split into. We could increase throughput slightly by
|
|
* taking out these two but the 24-sack/8-CWR i.e. 32 bytes I pre-reserve I
|
|
* feel is worth it for now.
|
|
*/
|
|
#ifndef SCTP_MAX_OVERHEAD
|
|
#ifdef INET6
|
|
#define SCTP_MAX_OVERHEAD (sizeof(struct sctp_data_chunk) + \
|
|
sizeof(struct sctphdr) + \
|
|
sizeof(struct sctp_ecne_chunk) + \
|
|
sizeof(struct sctp_sack_chunk) + \
|
|
sizeof(struct ip6_hdr))
|
|
|
|
#define SCTP_MED_OVERHEAD (sizeof(struct sctp_data_chunk) + \
|
|
sizeof(struct sctphdr) + \
|
|
sizeof(struct ip6_hdr))
|
|
|
|
|
|
#define SCTP_MIN_OVERHEAD (sizeof(struct ip6_hdr) + \
|
|
sizeof(struct sctphdr))
|
|
|
|
#else
|
|
#define SCTP_MAX_OVERHEAD (sizeof(struct sctp_data_chunk) + \
|
|
sizeof(struct sctphdr) + \
|
|
sizeof(struct sctp_ecne_chunk) + \
|
|
sizeof(struct sctp_sack_chunk) + \
|
|
sizeof(struct ip))
|
|
|
|
#define SCTP_MED_OVERHEAD (sizeof(struct sctp_data_chunk) + \
|
|
sizeof(struct sctphdr) + \
|
|
sizeof(struct ip))
|
|
|
|
|
|
#define SCTP_MIN_OVERHEAD (sizeof(struct ip) + \
|
|
sizeof(struct sctphdr))
|
|
|
|
#endif /* INET6 */
|
|
#endif /* !SCTP_MAX_OVERHEAD */
|
|
|
|
#define SCTP_MED_V4_OVERHEAD (sizeof(struct sctp_data_chunk) + \
|
|
sizeof(struct sctphdr) + \
|
|
sizeof(struct ip))
|
|
|
|
#define SCTP_MIN_V4_OVERHEAD (sizeof(struct ip) + \
|
|
sizeof(struct sctphdr))
|
|
|
|
#if defined(_WIN32) && !defined(__Userspace__)
|
|
#include <packoff.h>
|
|
#endif
|
|
#if defined(_WIN32) && defined(__Userspace__)
|
|
#pragma pack(pop)
|
|
#endif
|
|
#undef SCTP_PACKED
|
|
#endif /* !__sctp_header_h__ */
|