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/* This header is used on many systems but for GNU we have
almost everything defined in the standard header. */
#include <sys/socket.h>
/*-
* 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.
*
* @(#)socketvar.h 8.3 (Berkeley) 2/19/95
*
* $FreeBSD: src/sys/sys/socketvar.h,v 1.171.2.1.2.1 2009/10/25 01:10:29 kensmith Exp $
*/
#ifndef _SYS_SOCKETVAR_H_
#define _SYS_SOCKETVAR_H_
#include <sys/queue.h> /* for TAILQ macros */
#include <sys/selinfo.h> /* for struct selinfo */
#include <sys/_lock.h>
#include <sys/_mutex.h>
#include <sys/_sx.h>
struct socket;
struct vnet;
struct xsockbuf {
u_int sb_cc;
u_int sb_hiwat;
u_int sb_mbcnt;
u_int sb_mcnt;
u_int sb_ccnt;
u_int sb_mbmax;
int sb_lowat;
int sb_timeo;
short sb_flags;
};
/*
* Variables for socket buffering.
*/
struct sockbuf {
struct selinfo sb_sel; /* process selecting read/write */
struct mtx sb_mtx; /* sockbuf lock */
struct sx sb_sx; /* prevent I/O interlacing */
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_mcnt; /* (c/d) number of mbufs in buffer */
u_int sb_ccnt; /* (c/d) number of clusters in buffer */
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 */
int (*sb_upcall)(struct socket *, void *, int); /* (c/d) */
void *sb_upcallarg; /* (c/d) */
};
/*
* Kernel structure per socket.
* Contains send and receive buffer queues,
* handle on protocol and pointer to protocol
* private data and error information.
*/
typedef u_quad_t so_gen_t;
/*-
* 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 */
struct vnet *so_vnet; /* network stack instance */
struct protosw *so_proto; /* (a) protocol handle */
/*
* 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 */
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 */
struct sockbuf so_rcv, so_snd;
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. */
so_gen_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;
int so_fibnum; /* routing domain for this socket */
};
/*
* Externalized form of struct socket used by the sysctl(3) interface.
*/
struct xsocket {
size_t xso_len; /* length of this structure */
struct socket *xso_so; /* makes a convenient handle sometimes */
short so_type;
short so_options;
short so_linger;
short so_state;
caddr_t so_pcb; /* another convenient handle */
int xso_protocol;
int xso_family;
u_short so_qlen;
u_short so_incqlen;
u_short so_qlimit;
short so_timeo;
u_short so_error;
pid_t so_pgid;
u_long so_oobmark;
struct xsockbuf so_rcv, so_snd;
uid_t so_uid; /* XXX */
};
#endif /* !_SYS_SOCKETVAR_H_ */
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