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gstreamer/subprojects/gst-plugins-bad/ext/sctp/usrsctp/usrsctplib/user_socketvar.h

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/*-
* Copyright (c) 1982, 1986, 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 4. Neither the name of the University 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 REGENTS 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 REGENTS 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.
*
*/
/* __Userspace__ version of <sys/socketvar.h> goes here.*/
#ifndef _USER_SOCKETVAR_H_
#define _USER_SOCKETVAR_H_
#if defined(__APPLE__)
#include <sys/types.h>
#include <unistd.h>
#endif
/* #include <sys/selinfo.h> */ /*__Userspace__ alternative?*/ /* for struct selinfo */
/* #include <sys/_lock.h> was 0 byte file */
/* #include <sys/_mutex.h> was 0 byte file */
/* #include <sys/_sx.h> */ /*__Userspace__ alternative?*/
#if !defined(__DragonFly__) && !defined(__FreeBSD__) && !defined(__NetBSD__) && !defined(_WIN32) && !defined(__native_client__)
#include <sys/uio.h>
#endif
#define SOCK_MAXADDRLEN 255
#if !defined(MSG_NOTIFICATION)
#define MSG_NOTIFICATION 0x2000 /* SCTP notification */
#endif
#define SCTP_SO_LINGER 0x0001
#define SCTP_SO_ACCEPTCONN 0x0002
#define SS_CANTRCVMORE 0x020
#define SS_CANTSENDMORE 0x010
#if defined(__APPLE__) || defined(__DragonFly__) || defined(__FreeBSD__) || defined(__OpenBSD__) || defined(_WIN32) || defined(__native_client__)
#define UIO_MAXIOV 1024
#define ERESTART (-1)
#endif
#if !defined(__APPLE__) && !defined(__NetBSD__) && !defined(__OpenBSD__)
enum uio_rw { UIO_READ, UIO_WRITE };
#endif
#if !defined(__NetBSD__) && !defined(__OpenBSD__)
/* Segment flag values. */
enum uio_seg {
UIO_USERSPACE, /* from user data space */
UIO_SYSSPACE /* from system space */
};
#endif
struct proc {
int stub; /* struct proc is a dummy for __Userspace__ */
};
MALLOC_DECLARE(M_ACCF);
MALLOC_DECLARE(M_PCB);
MALLOC_DECLARE(M_SONAME);
/* __Userspace__ Are these all the fields we need?
* Removing struct thread *uio_td; owner field
*/
struct uio {
struct iovec *uio_iov; /* scatter/gather list */
int uio_iovcnt; /* length of scatter/gather list */
off_t uio_offset; /* offset in target object */
ssize_t uio_resid; /* remaining bytes to process */
enum uio_seg uio_segflg; /* address space */
enum uio_rw uio_rw; /* operation */
};
/* __Userspace__ */
/*
* Kernel structure per socket.
* Contains send and receive buffer queues,
* handle on protocol and pointer to protocol
* private data and error information.
*/
#if defined(_WIN32)
#define AF_ROUTE 17
#if !defined(__MINGW32__)
typedef __int32 pid_t;
#endif
typedef unsigned __int32 uid_t;
enum sigType {
SIGNAL = 0,
BROADCAST = 1,
MAX_EVENTS = 2
};
#endif
/*-
* Locking key to struct socket:
* (a) constant after allocation, no locking required.
* (b) locked by SOCK_LOCK(so).
* (c) locked by SOCKBUF_LOCK(&so->so_rcv).
* (d) locked by SOCKBUF_LOCK(&so->so_snd).
* (e) locked by ACCEPT_LOCK().
* (f) not locked since integer reads/writes are atomic.
* (g) used only as a sleep/wakeup address, no value.
* (h) locked by global mutex so_global_mtx.
*/
struct socket {
int so_count; /* (b) reference count */
short so_type; /* (a) generic type, see socket.h */
short so_options; /* from socket call, see socket.h */
short so_linger; /* time to linger while closing */
short so_state; /* (b) internal state flags SS_* */
int so_qstate; /* (e) internal state flags SQ_* */
void *so_pcb; /* protocol control block */
int so_dom;
/*
* Variables for connection queuing.
* Socket where accepts occur is so_head in all subsidiary sockets.
* If so_head is 0, socket is not related to an accept.
* For head socket so_incomp queues partially completed connections,
* while so_comp is a queue of connections ready to be accepted.
* If a connection is aborted and it has so_head set, then
* it has to be pulled out of either so_incomp or so_comp.
* We allow connections to queue up based on current queue lengths
* and limit on number of queued connections for this socket.
*/
struct socket *so_head; /* (e) back pointer to listen socket */
TAILQ_HEAD(, socket) so_incomp; /* (e) queue of partial unaccepted connections */
TAILQ_HEAD(, socket) so_comp; /* (e) queue of complete unaccepted connections */
TAILQ_ENTRY(socket) so_list; /* (e) list of unaccepted connections */
u_short so_qlen; /* (e) number of unaccepted connections */
u_short so_incqlen; /* (e) number of unaccepted incomplete
connections */
u_short so_qlimit; /* (e) max number queued connections */
short so_timeo; /* (g) connection timeout */
userland_cond_t timeo_cond; /* timeo_cond condition variable being used in wakeup */
u_short so_error; /* (f) error affecting connection */
struct sigio *so_sigio; /* [sg] information for async I/O or
out of band data (SIGURG) */
u_long so_oobmark; /* (c) chars to oob mark */
TAILQ_HEAD(, aiocblist) so_aiojobq; /* AIO ops waiting on socket */
/*
* Variables for socket buffering.
*/
struct sockbuf {
/* __Userspace__ Many of these fields may
* not be required for the sctp stack.
* Commenting out the following.
* Including pthread mutex and condition variable to be
* used by sbwait, sorwakeup and sowwakeup.
*/
/* struct selinfo sb_sel;*/ /* process selecting read/write */
/* struct mtx sb_mtx;*/ /* sockbuf lock */
/* struct sx sb_sx;*/ /* prevent I/O interlacing */
userland_cond_t sb_cond; /* sockbuf condition variable */
userland_mutex_t sb_mtx; /* sockbuf lock associated with sb_cond */
short sb_state; /* (c/d) socket state on sockbuf */
#define sb_startzero sb_mb
struct mbuf *sb_mb; /* (c/d) the mbuf chain */
struct mbuf *sb_mbtail; /* (c/d) the last mbuf in the chain */
struct mbuf *sb_lastrecord; /* (c/d) first mbuf of last
* record in socket buffer */
struct mbuf *sb_sndptr; /* (c/d) pointer into mbuf chain */
u_int sb_sndptroff; /* (c/d) byte offset of ptr into chain */
u_int sb_cc; /* (c/d) actual chars in buffer */
u_int sb_hiwat; /* (c/d) max actual char count */
u_int sb_mbcnt; /* (c/d) chars of mbufs used */
u_int sb_mbmax; /* (c/d) max chars of mbufs to use */
u_int sb_ctl; /* (c/d) non-data chars in buffer */
int sb_lowat; /* (c/d) low water mark */
int sb_timeo; /* (c/d) timeout for read/write */
short sb_flags; /* (c/d) flags, see below */
} so_rcv, so_snd;
/*
* Constants for sb_flags field of struct sockbuf.
*/
#define SB_MAX (256*1024) /* default for max chars in sockbuf */
#define SB_RAW (64*1024*2) /*Aligning so->so_rcv.sb_hiwat with the receive buffer size of raw socket*/
/*
* Constants for sb_flags field of struct sockbuf.
*/
#define SB_WAIT 0x04 /* someone is waiting for data/space */
#define SB_SEL 0x08 /* someone is selecting */
#define SB_ASYNC 0x10 /* ASYNC I/O, need signals */
#define SB_UPCALL 0x20 /* someone wants an upcall */
#define SB_NOINTR 0x40 /* operations not interruptible */
#define SB_AIO 0x80 /* AIO operations queued */
#define SB_KNOTE 0x100 /* kernel note attached */
#define SB_AUTOSIZE 0x800 /* automatically size socket buffer */
void (*so_upcall)(struct socket *, void *, int);
void *so_upcallarg;
struct ucred *so_cred; /* (a) user credentials */
struct label *so_label; /* (b) MAC label for socket */
struct label *so_peerlabel; /* (b) cached MAC label for peer */
/* NB: generation count must not be first. */
uint32_t so_gencnt; /* (h) generation count */
void *so_emuldata; /* (b) private data for emulators */
struct so_accf {
struct accept_filter *so_accept_filter;
void *so_accept_filter_arg; /* saved filter args */
char *so_accept_filter_str; /* saved user args */
} *so_accf;
};
#define SB_EMPTY_FIXUP(sb) do { \
if ((sb)->sb_mb == NULL) { \
(sb)->sb_mbtail = NULL; \
(sb)->sb_lastrecord = NULL; \
} \
} while (/*CONSTCOND*/0)
/*
* Global accept mutex to serialize access to accept queues and
* fields associated with multiple sockets. This allows us to
* avoid defining a lock order between listen and accept sockets
* until such time as it proves to be a good idea.
*/
#if defined(_WIN32)
extern userland_mutex_t accept_mtx;
extern userland_cond_t accept_cond;
#define ACCEPT_LOCK_ASSERT()
#define ACCEPT_LOCK() do { \
EnterCriticalSection(&accept_mtx); \
} while (0)
#define ACCEPT_UNLOCK() do { \
LeaveCriticalSection(&accept_mtx); \
} while (0)
#define ACCEPT_UNLOCK_ASSERT()
#else
extern userland_mutex_t accept_mtx;
extern userland_cond_t accept_cond;
#ifdef INVARIANTS
#define ACCEPT_LOCK() KASSERT(pthread_mutex_lock(&accept_mtx) == 0, ("%s: accept_mtx already locked", __func__))
#define ACCEPT_UNLOCK() KASSERT(pthread_mutex_unlock(&accept_mtx) == 0, ("%s: accept_mtx not locked", __func__))
#else
#define ACCEPT_LOCK() (void)pthread_mutex_lock(&accept_mtx)
#define ACCEPT_UNLOCK() (void)pthread_mutex_unlock(&accept_mtx)
#endif
#define ACCEPT_LOCK_ASSERT() \
KASSERT(pthread_mutex_trylock(&accept_mtx) == EBUSY, ("%s: accept_mtx not locked", __func__))
#define ACCEPT_UNLOCK_ASSERT() do { \
KASSERT(pthread_mutex_trylock(&accept_mtx) == 0, ("%s: accept_mtx locked", __func__)); \
(void)pthread_mutex_unlock(&accept_mtx); \
} while (0)
#endif
/*
* Per-socket buffer mutex used to protect most fields in the socket
* buffer.
*/
#define SOCKBUF_MTX(_sb) (&(_sb)->sb_mtx)
#if defined(_WIN32)
#define SOCKBUF_LOCK_INIT(_sb, _name) \
InitializeCriticalSection(SOCKBUF_MTX(_sb))
#define SOCKBUF_LOCK_DESTROY(_sb) DeleteCriticalSection(SOCKBUF_MTX(_sb))
#define SOCKBUF_COND_INIT(_sb) InitializeConditionVariable((&(_sb)->sb_cond))
#define SOCKBUF_COND_DESTROY(_sb) DeleteConditionVariable((&(_sb)->sb_cond))
#define SOCK_COND_INIT(_so) InitializeConditionVariable((&(_so)->timeo_cond))
#define SOCK_COND_DESTROY(_so) DeleteConditionVariable((&(_so)->timeo_cond))
#define SOCK_COND(_so) (&(_so)->timeo_cond)
#else
#ifdef INVARIANTS
#define SOCKBUF_LOCK_INIT(_sb, _name) do { \
pthread_mutexattr_t mutex_attr; \
\
pthread_mutexattr_init(&mutex_attr); \
pthread_mutexattr_settype(&mutex_attr, PTHREAD_MUTEX_ERRORCHECK); \
pthread_mutex_init(SOCKBUF_MTX(_sb), &mutex_attr); \
pthread_mutexattr_destroy(&mutex_attr); \
} while (0)
#else
#define SOCKBUF_LOCK_INIT(_sb, _name) \
pthread_mutex_init(SOCKBUF_MTX(_sb), NULL)
#endif
#define SOCKBUF_LOCK_DESTROY(_sb) pthread_mutex_destroy(SOCKBUF_MTX(_sb))
#define SOCKBUF_COND_INIT(_sb) pthread_cond_init((&(_sb)->sb_cond), NULL)
#define SOCKBUF_COND_DESTROY(_sb) pthread_cond_destroy((&(_sb)->sb_cond))
#define SOCK_COND_INIT(_so) pthread_cond_init((&(_so)->timeo_cond), NULL)
#define SOCK_COND_DESTROY(_so) pthread_cond_destroy((&(_so)->timeo_cond))
#define SOCK_COND(_so) (&(_so)->timeo_cond)
#endif
/*__Userspace__ SOCKBUF_LOCK(_sb) is now defined in netinet/sctp_process_lock.h */
/* #define SOCKBUF_OWNED(_sb) mtx_owned(SOCKBUF_MTX(_sb)) unused */
/*__Userspace__ SOCKBUF_UNLOCK(_sb) is now defined in netinet/sctp_process_lock.h */
/*__Userspace__ SOCKBUF_LOCK_ASSERT(_sb) is now defined in netinet/sctp_process_lock.h */
/* #define SOCKBUF_UNLOCK_ASSERT(_sb) mtx_assert(SOCKBUF_MTX(_sb), MA_NOTOWNED) unused */
/*
* Per-socket mutex: we reuse the receive socket buffer mutex for space
* efficiency. This decision should probably be revisited as we optimize
* locking for the socket code.
*/
#define SOCK_MTX(_so) SOCKBUF_MTX(&(_so)->so_rcv)
/*__Userspace__ SOCK_LOCK(_so) is now defined in netinet/sctp_process_lock.h */
/* #define SOCK_OWNED(_so) SOCKBUF_OWNED(&(_so)->so_rcv) unused */
/*__Userspace__ SOCK_UNLOCK(_so) is now defined in netinet/sctp_process_lock.h */
#define SOCK_LOCK_ASSERT(_so) SOCKBUF_LOCK_ASSERT(&(_so)->so_rcv)
/*
* Socket state bits.
*
* Historically, this bits were all kept in the so_state field. For
* locking reasons, they are now in multiple fields, as they are
* locked differently. so_state maintains basic socket state protected
* by the socket lock. so_qstate holds information about the socket
* accept queues. Each socket buffer also has a state field holding
* information relevant to that socket buffer (can't send, rcv). Many
* fields will be read without locks to improve performance and avoid
* lock order issues. However, this approach must be used with caution.
*/
#define SS_NOFDREF 0x0001 /* no file table ref any more */
#define SS_ISCONNECTED 0x0002 /* socket connected to a peer */
#define SS_ISCONNECTING 0x0004 /* in process of connecting to peer */
#define SS_ISDISCONNECTING 0x0008 /* in process of disconnecting */
#define SS_NBIO 0x0100 /* non-blocking ops */
#define SS_ASYNC 0x0200 /* async i/o notify */
#define SS_ISCONFIRMING 0x0400 /* deciding to accept connection req */
#define SS_ISDISCONNECTED 0x2000 /* socket disconnected from peer */
/*
* Protocols can mark a socket as SS_PROTOREF to indicate that, following
* pru_detach, they still want the socket to persist, and will free it
* themselves when they are done. Protocols should only ever call sofree()
* following setting this flag in pru_detach(), and never otherwise, as
* sofree() bypasses socket reference counting.
*/
#define SS_PROTOREF 0x4000 /* strong protocol reference */
/*
* Socket state bits now stored in the socket buffer state field.
*/
#define SBS_CANTSENDMORE 0x0010 /* can't send more data to peer */
#define SBS_CANTRCVMORE 0x0020 /* can't receive more data from peer */
#define SBS_RCVATMARK 0x0040 /* at mark on input */
/*
* Socket state bits stored in so_qstate.
*/
#define SQ_INCOMP 0x0800 /* unaccepted, incomplete connection */
#define SQ_COMP 0x1000 /* unaccepted, complete connection */
/*
* Socket event flags
*/
#define SCTP_EVENT_READ 0x0001 /* socket is readable */
#define SCTP_EVENT_WRITE 0x0002 /* socket is writeable */
#define SCTP_EVENT_ERROR 0x0004 /* socket has an error state */
/*-------------------------------------------------------------*/
/*-------------------------------------------------------------*/
/* __Userspace__ */
/*-------------------------------------------------------------*/
/*-------------------------------------------------------------*/
/* this new __Userspace__ section is to copy portions of the _KERNEL block
* above into, avoiding having to port the entire thing at once...
* For function prototypes, the full bodies are in user_socket.c .
*/
/* ---------------------------------------------------------- */
/* --- function prototypes (implemented in user_socket.c) --- */
/* ---------------------------------------------------------- */
void soisconnecting(struct socket *so);
void soisdisconnecting(struct socket *so);
void soisconnected(struct socket *so);
struct socket * sonewconn(struct socket *head, int connstatus);
void socantrcvmore(struct socket *so);
void socantsendmore(struct socket *so);
void sofree(struct socket *so);
/* -------------- */
/* --- macros --- */
/* -------------- */
#define soref(so) do { \
SOCK_LOCK_ASSERT(so); \
++(so)->so_count; \
} while (0)
#define sorele(so) do { \
ACCEPT_LOCK_ASSERT(); \
SOCK_LOCK_ASSERT(so); \
KASSERT((so)->so_count > 0, ("sorele")); \
if (--(so)->so_count == 0) \
sofree(so); \
else { \
SOCK_UNLOCK(so); \
ACCEPT_UNLOCK(); \
} \
} while (0)
/* replacing imin with min (user_environment.h) */
#define sbspace(sb) \
((long) min((int)((sb)->sb_hiwat - (sb)->sb_cc), \
(int)((sb)->sb_mbmax - (sb)->sb_mbcnt)))
/* do we have to send all at once on a socket? */
#define sosendallatonce(so) \
((so)->so_proto->pr_flags & PR_ATOMIC)
/* can we read something from so? */
#define soreadable(so) \
((int)((so)->so_rcv.sb_cc) >= (so)->so_rcv.sb_lowat || \
((so)->so_rcv.sb_state & SBS_CANTRCVMORE) || \
!TAILQ_EMPTY(&(so)->so_comp) || (so)->so_error)
#if 0 /* original */
#define PR_CONNREQUIRED 0x04 /* from sys/protosw.h "needed" for sowriteable */
#define sowriteable(so) \
((sbspace(&(so)->so_snd) >= (so)->so_snd.sb_lowat && \
(((so)->so_state&SS_ISCONNECTED) || \
((so)->so_proto->pr_flags&PR_CONNREQUIRED)==0)) || \
((so)->so_snd.sb_state & SBS_CANTSENDMORE) || \
(so)->so_error)
#else /* line with PR_CONNREQUIRED removed */
/* can we write something to so? */
#define sowriteable(so) \
((sbspace(&(so)->so_snd) >= (so)->so_snd.sb_lowat && \
(((so)->so_state&SS_ISCONNECTED))) || \
((so)->so_snd.sb_state & SBS_CANTSENDMORE) || \
(so)->so_error)
#endif
extern void solisten_proto(struct socket *so, int backlog);
extern int solisten_proto_check(struct socket *so);
extern int sctp_listen(struct socket *so, int backlog, struct proc *p);
extern void socantrcvmore_locked(struct socket *so);
extern int sctp_bind(struct socket *so, struct sockaddr *addr);
extern int sctp6_bind(struct socket *so, struct sockaddr *addr, void *proc);
extern int sctpconn_bind(struct socket *so, struct sockaddr *addr);
extern int sctp_accept(struct socket *so, struct sockaddr **addr);
extern int sctp_attach(struct socket *so, int proto, uint32_t vrf_id);
extern int sctp6_attach(struct socket *so, int proto, uint32_t vrf_id);
extern int sctp_abort(struct socket *so);
extern int sctp6_abort(struct socket *so);
extern void sctp_close(struct socket *so);
extern int soaccept(struct socket *so, struct sockaddr **nam);
extern int solisten(struct socket *so, int backlog);
extern int soreserve(struct socket *so, u_long sndcc, u_long rcvcc);
extern void sowakeup(struct socket *so, struct sockbuf *sb);
extern void wakeup(void *ident, struct socket *so); /*__Userspace__ */
extern int uiomove(void *cp, int n, struct uio *uio);
extern int sbwait(struct sockbuf *sb);
extern int sodisconnect(struct socket *so);
extern int soconnect(struct socket *so, struct sockaddr *nam);
extern int sctp_disconnect(struct socket *so);
extern int sctp_connect(struct socket *so, struct sockaddr *addr);
extern int sctp6_connect(struct socket *so, struct sockaddr *addr);
extern int sctpconn_connect(struct socket *so, struct sockaddr *addr);
extern void sctp_finish(void);
/* ------------------------------------------------ */
/* ----- macros copied from above ---- */
/* ------------------------------------------------ */
/*
* Do we need to notify the other side when I/O is possible?
*/
#define sb_notify(sb) (((sb)->sb_flags & (SB_WAIT | SB_SEL | SB_ASYNC | \
SB_UPCALL | SB_AIO | SB_KNOTE)) != 0)
/*
* In sorwakeup() and sowwakeup(), acquire the socket buffer lock to
* avoid a non-atomic test-and-wakeup. However, sowakeup is
* responsible for releasing the lock if it is called. We unlock only
* if we don't call into sowakeup. If any code is introduced that
* directly invokes the underlying sowakeup() primitives, it must
* maintain the same semantics.
*/
#define sorwakeup_locked(so) do { \
SOCKBUF_LOCK_ASSERT(&(so)->so_rcv); \
if (sb_notify(&(so)->so_rcv)) \
sowakeup((so), &(so)->so_rcv); \
else \
SOCKBUF_UNLOCK(&(so)->so_rcv); \
} while (0)
#define sorwakeup(so) do { \
SOCKBUF_LOCK(&(so)->so_rcv); \
sorwakeup_locked(so); \
} while (0)
#define sowwakeup_locked(so) do { \
SOCKBUF_LOCK_ASSERT(&(so)->so_snd); \
if (sb_notify(&(so)->so_snd)) \
sowakeup((so), &(so)->so_snd); \
else \
SOCKBUF_UNLOCK(&(so)->so_snd); \
} while (0)
#define sowwakeup(so) do { \
SOCKBUF_LOCK(&(so)->so_snd); \
sowwakeup_locked(so); \
} while (0)
#endif /* !_SYS_SOCKETVAR_H_ */
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