socketvar.h revision 131029
11541Srgrimes/*- 21541Srgrimes * Copyright (c) 1982, 1986, 1990, 1993 31541Srgrimes * The Regents of the University of California. All rights reserved. 41541Srgrimes * 51541Srgrimes * Redistribution and use in source and binary forms, with or without 61541Srgrimes * modification, are permitted provided that the following conditions 71541Srgrimes * are met: 81541Srgrimes * 1. Redistributions of source code must retain the above copyright 91541Srgrimes * notice, this list of conditions and the following disclaimer. 101541Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 111541Srgrimes * notice, this list of conditions and the following disclaimer in the 121541Srgrimes * documentation and/or other materials provided with the distribution. 131541Srgrimes * 4. Neither the name of the University nor the names of its contributors 141541Srgrimes * may be used to endorse or promote products derived from this software 151541Srgrimes * without specific prior written permission. 161541Srgrimes * 171541Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 181541Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 191541Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 201541Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 211541Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 221541Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 231541Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 241541Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 251541Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 261541Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 271541Srgrimes * SUCH DAMAGE. 281541Srgrimes * 2914505Shsu * @(#)socketvar.h 8.3 (Berkeley) 2/19/95 3050477Speter * $FreeBSD: head/sys/sys/socketvar.h 131029 2004-06-24 04:27:10Z rwatson $ 311541Srgrimes */ 321541Srgrimes 332165Spaul#ifndef _SYS_SOCKETVAR_H_ 342165Spaul#define _SYS_SOCKETVAR_H_ 352165Spaul 3615492Sbde#include <sys/queue.h> /* for TAILQ macros */ 3770834Swollman#include <sys/selinfo.h> /* for struct selinfo */ 38130380Srwatson#include <sys/_lock.h> 39130380Srwatson#include <sys/_mutex.h> 401541Srgrimes 411541Srgrimes/* 421541Srgrimes * Kernel structure per socket. 431541Srgrimes * Contains send and receive buffer queues, 441541Srgrimes * handle on protocol and pointer to protocol 451541Srgrimes * private data and error information. 461541Srgrimes */ 4736079Swollmantypedef u_quad_t so_gen_t; 4836079Swollman 49129958Srwatson/*- 50129958Srwatson * Locking key to struct socket: 51129958Srwatson * (a) constant after allocation, no locking required. 52129958Srwatson * (b) locked by SOCK_LOCK(so). 53129958Srwatson * (c) locked by SOCKBUF_LOCK(&so->so_rcv). 54129958Srwatson * (d) locked by SOCKBUF_LOCK(&so->so_snd). 55129958Srwatson * (e) locked by ACCEPT_LOCK(). 56129958Srwatson * (f) not locked since integer reads/writes are atomic. 57129958Srwatson * (g) used only as a sleep/wakeup address, no value. 5895552Stanimura */ 591541Srgrimesstruct socket { 60130387Srwatson int so_count; /* (b) reference count */ 61129958Srwatson short so_type; /* (a) generic type, see socket.h */ 6297658Stanimura short so_options; /* from socket call, see socket.h */ 6397658Stanimura short so_linger; /* time to linger while closing */ 64130818Srwatson short so_state; /* (b) internal state flags SS_* */ 65129979Srwatson int so_qstate; /* (e) internal state flags SQ_* */ 6698993Salfred void *so_pcb; /* protocol control block */ 67129958Srwatson struct protosw *so_proto; /* (a) protocol handle */ 681541Srgrimes/* 6913765Smpp * Variables for connection queuing. 701541Srgrimes * Socket where accepts occur is so_head in all subsidiary sockets. 711541Srgrimes * If so_head is 0, socket is not related to an accept. 7278913Sjlemon * For head socket so_incomp queues partially completed connections, 7378913Sjlemon * while so_comp is a queue of connections ready to be accepted. 741541Srgrimes * If a connection is aborted and it has so_head set, then 7578913Sjlemon * it has to be pulled out of either so_incomp or so_comp. 761541Srgrimes * We allow connections to queue up based on current queue lengths 771541Srgrimes * and limit on number of queued connections for this socket. 781541Srgrimes */ 79129979Srwatson struct socket *so_head; /* (e) back pointer to accept socket */ 80129979Srwatson TAILQ_HEAD(, socket) so_incomp; /* (e) queue of partial unaccepted connections */ 81129979Srwatson TAILQ_HEAD(, socket) so_comp; /* (e) queue of complete unaccepted connections */ 82129979Srwatson TAILQ_ENTRY(socket) so_list; /* (e) list of unaccepted connections */ 83129979Srwatson short so_qlen; /* (e) number of unaccepted connections */ 84129979Srwatson short so_incqlen; /* (e) number of unaccepted incomplete 8518787Spst connections */ 86129979Srwatson short so_qlimit; /* (e) max number queued connections */ 87130527Srwatson short so_timeo; /* (g) connection timeout */ 88131029Srwatson u_short so_error; /* (f) error affecting connection */ 8997658Stanimura struct sigio *so_sigio; /* [sg] information for async I/O or 9041087Struckman out of band data (SIGURG) */ 91131017Srwatson u_long so_oobmark; /* (c) chars to oob mark */ 9297658Stanimura TAILQ_HEAD(, aiocblist) so_aiojobq; /* AIO ops waiting on socket */ 931541Srgrimes/* 941541Srgrimes * Variables for socket buffering. 951541Srgrimes */ 9683421Sobrien struct sockbuf { 97100591Sjdp struct selinfo sb_sel; /* process selecting read/write */ 98130380Srwatson struct mtx sb_mtx; /* sockbuf lock */ 99117708Srobert#define sb_startzero sb_mb 100130527Srwatson struct mbuf *sb_mb; /* (c/d) the mbuf chain */ 101130527Srwatson struct mbuf *sb_mbtail; /* (c/d) the last mbuf in the chain */ 102130527Srwatson struct mbuf *sb_lastrecord; /* (c/d) first mbuf of last 103130527Srwatson * record in socket buffer */ 104130527Srwatson u_int sb_cc; /* (c/d) actual chars in buffer */ 105130527Srwatson u_int sb_hiwat; /* (c/d) max actual char count */ 106130527Srwatson u_int sb_mbcnt; /* (c/d) chars of mbufs used */ 107130527Srwatson u_int sb_mbmax; /* (c/d) max chars of mbufs to use */ 108130527Srwatson u_int sb_ctl; /* (c/d) non-data chars in buffer */ 109130527Srwatson int sb_lowat; /* (c/d) low water mark */ 110130527Srwatson int sb_timeo; /* (c/d) timeout for read/write */ 111130527Srwatson short sb_flags; /* (c/d) flags, see below */ 112130480Srwatson short sb_state; /* (c/d) socket state on sockbuf */ 1131541Srgrimes } so_rcv, so_snd; 114130818Srwatson/* 115130818Srwatson * Constants for sb_flags field of struct sockbuf. 116130818Srwatson */ 1171541Srgrimes#define SB_MAX (256*1024) /* default for max chars in sockbuf */ 118131022Srwatson/* 119131022Srwatson * Constants for sb_flags field of struct sockbuf. 120131022Srwatson */ 1211541Srgrimes#define SB_LOCK 0x01 /* lock on data queue */ 1221541Srgrimes#define SB_WANT 0x02 /* someone is waiting to lock */ 1231541Srgrimes#define SB_WAIT 0x04 /* someone is waiting for data/space */ 1241541Srgrimes#define SB_SEL 0x08 /* someone is selecting */ 1251541Srgrimes#define SB_ASYNC 0x10 /* ASYNC I/O, need signals */ 12636527Speter#define SB_UPCALL 0x20 /* someone wants an upcall */ 1271541Srgrimes#define SB_NOINTR 0x40 /* operations not interruptible */ 12855943Sjasone#define SB_AIO 0x80 /* AIO operations queued */ 12959288Sjlemon#define SB_KNOTE 0x100 /* kernel note attached */ 1301541Srgrimes 13197658Stanimura void (*so_upcall)(struct socket *, void *, int); 13297658Stanimura void *so_upcallarg; 133130527Srwatson struct ucred *so_cred; /* (a) user credentials */ 134130398Srwatson struct label *so_label; /* (b) MAC label for socket */ 135130398Srwatson struct label *so_peerlabel; /* (b) cached MAC label for peer */ 13638482Swollman /* NB: generation count must not be first; easiest to make it last. */ 13797658Stanimura so_gen_t so_gencnt; /* generation count */ 13897658Stanimura void *so_emuldata; /* private data for emulators */ 13997658Stanimura struct so_accf { 14097658Stanimura struct accept_filter *so_accept_filter; 14197658Stanimura void *so_accept_filter_arg; /* saved filter args */ 14297658Stanimura char *so_accept_filter_str; /* saved user args */ 14397658Stanimura } *so_accf; 1441541Srgrimes}; 1451541Srgrimes 146121628Ssam#define SB_EMPTY_FIXUP(sb) do { \ 147121628Ssam if ((sb)->sb_mb == NULL) { \ 148121628Ssam (sb)->sb_mbtail = NULL; \ 149121628Ssam (sb)->sb_lastrecord = NULL; \ 150121628Ssam } \ 151121628Ssam} while (/*CONSTCOND*/0) 152121628Ssam 1531541Srgrimes/* 154129979Srwatson * Global accept mutex to serialize access to accept queues and 155129979Srwatson * fields associated with multiple sockets. This allows us to 156129979Srwatson * avoid defining a lock order between listen and accept sockets 157129979Srwatson * until such time as it proves to be a good idea. 158129979Srwatson */ 159129979Srwatsonextern struct mtx accept_mtx; 160130364Srwatson#define ACCEPT_LOCK() mtx_lock(&accept_mtx) 161130364Srwatson#define ACCEPT_UNLOCK() mtx_unlock(&accept_mtx) 162129979Srwatson 163129979Srwatson/* 164130380Srwatson * Per-socket buffer mutex used to protect most fields in the socket 165130380Srwatson * buffer. 166130380Srwatson */ 167130380Srwatson#define SOCKBUF_MTX(_sb) (&(_sb)->sb_mtx) 168130380Srwatson#define SOCKBUF_LOCK_INIT(_sb, _name) \ 169130380Srwatson mtx_init(SOCKBUF_MTX(_sb), _name, NULL, MTX_DEF) 170130380Srwatson#define SOCKBUF_LOCK_DESTROY(_sb) mtx_destroy(SOCKBUF_MTX(_sb)) 171130380Srwatson#define SOCKBUF_LOCK(_sb) mtx_lock(SOCKBUF_MTX(_sb)) 172130380Srwatson#define SOCKBUF_OWNED(_sb) mtx_owned(SOCKBUF_MTX(_sb)) 173130380Srwatson#define SOCKBUF_UNLOCK(_sb) mtx_unlock(SOCKBUF_MTX(_sb)) 174130380Srwatson#define SOCKBUF_LOCK_ASSERT(_sb) mtx_assert(SOCKBUF_MTX(_sb), MA_OWNED) 175130380Srwatson 176130380Srwatson/* 177130380Srwatson * Per-socket mutex: we reuse the receive socket buffer mutex for space 178130380Srwatson * efficiency. This decision should probably be revisited as we optimize 179130380Srwatson * locking for the socket code. 180130380Srwatson */ 181130380Srwatson#define SOCK_MTX(_so) SOCKBUF_MTX(&(_so)->so_rcv) 182130380Srwatson#define SOCK_LOCK(_so) SOCKBUF_LOCK(&(_so)->so_rcv) 183130380Srwatson#define SOCK_OWNED(_so) SOCKBUF_OWNED(&(_so)->so_rcv) 184130380Srwatson#define SOCK_UNLOCK(_so) SOCKBUF_UNLOCK(&(_so)->so_rcv) 185130380Srwatson#define SOCK_LOCK_ASSERT(_so) SOCKBUF_LOCK_ASSERT(&(_so)->so_rcv) 186130380Srwatson 187130492Srwatson/* 1881541Srgrimes * Socket state bits. 189130480Srwatson * 190130480Srwatson * Historically, this bits were all kept in the so_state field. For 191130480Srwatson * locking reasons, they are now in multiple fields, as they are 192130480Srwatson * locked differently. so_state maintains basic socket state protected 193130480Srwatson * by the socket lock. so_qstate holds information about the socket 194130480Srwatson * accept queues. Each socket buffer also has a state field holding 195130480Srwatson * information relevant to that socket buffer (can't send, rcv). Many 196130480Srwatson * fields will be read without locks to improve performance and avoid 197130480Srwatson * lock order issues. However, this approach must be used with caution. 1981541Srgrimes */ 19914547Sdg#define SS_NOFDREF 0x0001 /* no file table ref any more */ 20014547Sdg#define SS_ISCONNECTED 0x0002 /* socket connected to a peer */ 20114547Sdg#define SS_ISCONNECTING 0x0004 /* in process of connecting to peer */ 20214547Sdg#define SS_ISDISCONNECTING 0x0008 /* in process of disconnecting */ 20314547Sdg#define SS_NBIO 0x0100 /* non-blocking ops */ 20414547Sdg#define SS_ASYNC 0x0200 /* async i/o notify */ 20514547Sdg#define SS_ISCONFIRMING 0x0400 /* deciding to accept connection req */ 20643196Sfenner#define SS_ISDISCONNECTED 0x2000 /* socket disconnected from peer */ 2071541Srgrimes 20836079Swollman/* 209130480Srwatson * Socket state bits now stored in the socket buffer state field. 210130480Srwatson */ 211130480Srwatson#define SBS_CANTSENDMORE 0x0010 /* can't send more data to peer */ 212130480Srwatson#define SBS_CANTRCVMORE 0x0020 /* can't receive more data from peer */ 213130480Srwatson#define SBS_RCVATMARK 0x0040 /* at mark on input */ 214130480Srwatson 215130480Srwatson/* 216129916Srwatson * Socket state bits stored in so_qstate. 217129916Srwatson */ 218129916Srwatson#define SQ_INCOMP 0x0800 /* unaccepted, incomplete connection */ 219129916Srwatson#define SQ_COMP 0x1000 /* unaccepted, complete connection */ 220129916Srwatson 221129916Srwatson/* 22236079Swollman * Externalized form of struct socket used by the sysctl(3) interface. 22336079Swollman */ 22483045Sobrienstruct xsocket { 22536079Swollman size_t xso_len; /* length of this structure */ 22636079Swollman struct socket *xso_so; /* makes a convenient handle sometimes */ 22736079Swollman short so_type; 22836079Swollman short so_options; 22936079Swollman short so_linger; 23036079Swollman short so_state; 23136079Swollman caddr_t so_pcb; /* another convenient handle */ 23236079Swollman int xso_protocol; 23336079Swollman int xso_family; 23436079Swollman short so_qlen; 23536079Swollman short so_incqlen; 23636079Swollman short so_qlimit; 23736079Swollman short so_timeo; 23836079Swollman u_short so_error; 23936079Swollman pid_t so_pgid; 24036079Swollman u_long so_oobmark; 24183421Sobrien struct xsockbuf { 242100591Sjdp u_int sb_cc; 243100591Sjdp u_int sb_hiwat; 244100591Sjdp u_int sb_mbcnt; 245100591Sjdp u_int sb_mbmax; 246100591Sjdp int sb_lowat; 247100591Sjdp int sb_timeo; 24836079Swollman short sb_flags; 24936079Swollman } so_rcv, so_snd; 25036079Swollman uid_t so_uid; /* XXX */ 25136079Swollman}; 25214547Sdg 253130393Srwatson#ifdef _KERNEL 254130393Srwatson 2551541Srgrimes/* 2561541Srgrimes * Macros for sockets and socket buffering. 2571541Srgrimes */ 2581541Srgrimes 2591541Srgrimes/* 26036527Speter * Do we need to notify the other side when I/O is possible? 26136527Speter */ 26255943Sjasone#define sb_notify(sb) (((sb)->sb_flags & (SB_WAIT | SB_SEL | SB_ASYNC | \ 26359288Sjlemon SB_UPCALL | SB_AIO | SB_KNOTE)) != 0) 26436527Speter 26536527Speter/* 2661541Srgrimes * How much space is there in a socket buffer (so->so_snd or so->so_rcv)? 2671541Srgrimes * This is problematical if the fields are unsigned, as the space might 2681541Srgrimes * still be negative (cc > hiwat or mbcnt > mbmax). Should detect 2691541Srgrimes * overflow and return 0. Should use "lmin" but it doesn't exist now. 2701541Srgrimes */ 2711541Srgrimes#define sbspace(sb) \ 2721541Srgrimes ((long) imin((int)((sb)->sb_hiwat - (sb)->sb_cc), \ 2731541Srgrimes (int)((sb)->sb_mbmax - (sb)->sb_mbcnt))) 2741541Srgrimes 2751541Srgrimes/* do we have to send all at once on a socket? */ 2761541Srgrimes#define sosendallatonce(so) \ 2771541Srgrimes ((so)->so_proto->pr_flags & PR_ATOMIC) 2781541Srgrimes 2791541Srgrimes/* can we read something from so? */ 2801541Srgrimes#define soreadable(so) \ 2811541Srgrimes ((so)->so_rcv.sb_cc >= (so)->so_rcv.sb_lowat || \ 282130480Srwatson ((so)->so_rcv.sb_state & SBS_CANTRCVMORE) || \ 28370536Sphk !TAILQ_EMPTY(&(so)->so_comp) || (so)->so_error) 2841541Srgrimes 2851541Srgrimes/* can we write something to so? */ 2861541Srgrimes#define sowriteable(so) \ 2873304Sphk ((sbspace(&(so)->so_snd) >= (so)->so_snd.sb_lowat && \ 2881541Srgrimes (((so)->so_state&SS_ISCONNECTED) || \ 2893304Sphk ((so)->so_proto->pr_flags&PR_CONNREQUIRED)==0)) || \ 290130480Srwatson ((so)->so_snd.sb_state & SBS_CANTSENDMORE) || \ 2911541Srgrimes (so)->so_error) 2921541Srgrimes 2931541Srgrimes/* adjust counters in sb reflecting allocation of m */ 2941541Srgrimes#define sballoc(sb, m) { \ 2951541Srgrimes (sb)->sb_cc += (m)->m_len; \ 296109098Stjr if ((m)->m_type != MT_DATA && (m)->m_type != MT_HEADER && \ 297109098Stjr (m)->m_type != MT_OOBDATA) \ 298106313Skbyanc (sb)->sb_ctl += (m)->m_len; \ 2991541Srgrimes (sb)->sb_mbcnt += MSIZE; \ 3001541Srgrimes if ((m)->m_flags & M_EXT) \ 3011541Srgrimes (sb)->sb_mbcnt += (m)->m_ext.ext_size; \ 3021541Srgrimes} 3031541Srgrimes 3041541Srgrimes/* adjust counters in sb reflecting freeing of m */ 3051541Srgrimes#define sbfree(sb, m) { \ 3061541Srgrimes (sb)->sb_cc -= (m)->m_len; \ 307109098Stjr if ((m)->m_type != MT_DATA && (m)->m_type != MT_HEADER && \ 308109098Stjr (m)->m_type != MT_OOBDATA) \ 309106313Skbyanc (sb)->sb_ctl -= (m)->m_len; \ 3101541Srgrimes (sb)->sb_mbcnt -= MSIZE; \ 3111541Srgrimes if ((m)->m_flags & M_EXT) \ 3121541Srgrimes (sb)->sb_mbcnt -= (m)->m_ext.ext_size; \ 3131541Srgrimes} 3141541Srgrimes 3151541Srgrimes/* 3161541Srgrimes * Set lock on sockbuf sb; sleep if lock is already held. 3171541Srgrimes * Unless SB_NOINTR is set on sockbuf, sleep is interruptible. 3181541Srgrimes * Returns error without lock if sleep is interrupted. 3191541Srgrimes */ 3201541Srgrimes#define sblock(sb, wf) ((sb)->sb_flags & SB_LOCK ? \ 321111119Simp (((wf) == M_WAITOK) ? sb_lock(sb) : EWOULDBLOCK) : \ 3221541Srgrimes ((sb)->sb_flags |= SB_LOCK), 0) 3231541Srgrimes 3241541Srgrimes/* release lock on sockbuf sb */ 325130831Srwatson#define sbunlock(sb) do { \ 326130831Srwatson SOCKBUF_LOCK_ASSERT(sb); \ 3271541Srgrimes (sb)->sb_flags &= ~SB_LOCK; \ 3281541Srgrimes if ((sb)->sb_flags & SB_WANT) { \ 3291541Srgrimes (sb)->sb_flags &= ~SB_WANT; \ 330111748Sdes wakeup(&(sb)->sb_flags); \ 3311541Srgrimes } \ 332130831Srwatson} while (0) 3331541Srgrimes 33486487Sdillon/* 33586487Sdillon * soref()/sorele() ref-count the socket structure. Note that you must 33686487Sdillon * still explicitly close the socket, but the last ref count will free 33786487Sdillon * the structure. 33886487Sdillon */ 339130383Srwatson#define soref(so) do { \ 340130387Srwatson SOCK_LOCK_ASSERT(so); \ 341130383Srwatson ++(so)->so_count; \ 342130383Srwatson} while (0) 34386487Sdillon 344130383Srwatson#define sorele(so) do { \ 345130387Srwatson SOCK_LOCK_ASSERT(so); \ 346130383Srwatson if ((so)->so_count <= 0) \ 347130383Srwatson panic("sorele"); \ 348130383Srwatson if (--(so)->so_count == 0) \ 349130383Srwatson sofree(so); \ 350130387Srwatson else \ 351130387Srwatson SOCK_UNLOCK(so); \ 352130383Srwatson} while (0) 35386487Sdillon 354130383Srwatson#define sotryfree(so) do { \ 355130387Srwatson SOCK_LOCK_ASSERT(so); \ 356130383Srwatson if ((so)->so_count == 0) \ 357130383Srwatson sofree(so); \ 358130387Srwatson else \ 359130387Srwatson SOCK_UNLOCK(so); \ 360130383Srwatson} while(0) 36186487Sdillon 362130831Srwatson/* 363130831Srwatson * In sorwakeup() and sowwakeup(), acquire the socket buffer lock to 364130831Srwatson * avoid a non-atomic test-and-wakeup. However, sowakeup is 365130831Srwatson * responsible for releasing the lock if it is called. We unlock only 366130831Srwatson * if we don't call into sowakeup. If any code is introduced that 367130831Srwatson * directly invokes the underlying sowakeup() primitives, it must 368130831Srwatson * maintain the same semantics. 369130831Srwatson */ 370130831Srwatson#define sorwakeup_locked(so) do { \ 371130831Srwatson SOCKBUF_LOCK_ASSERT(&(so)->so_rcv); \ 372130383Srwatson if (sb_notify(&(so)->so_rcv)) \ 373130831Srwatson sowakeup((so), &(so)->so_rcv); \ 374130831Srwatson else \ 375130831Srwatson SOCKBUF_UNLOCK(&(so)->so_rcv); \ 376130383Srwatson} while (0) 3771541Srgrimes 378130831Srwatson#define sorwakeup(so) do { \ 379130831Srwatson SOCKBUF_LOCK(&(so)->so_rcv); \ 380130831Srwatson sorwakeup_locked(so); \ 381130831Srwatson} while (0) 382130831Srwatson 383130831Srwatson#define sowwakeup_locked(so) do { \ 384131029Srwatson SOCKBUF_LOCK_ASSERT(&(so)->so_snd); \ 385130383Srwatson if (sb_notify(&(so)->so_snd)) \ 386130383Srwatson sowakeup((so), &(so)->so_snd); \ 387130831Srwatson else \ 388130831Srwatson SOCKBUF_UNLOCK(&(so)->so_snd); \ 389130383Srwatson} while (0) 3901541Srgrimes 391130831Srwatson#define sowwakeup(so) do { \ 392130831Srwatson SOCKBUF_LOCK(&(so)->so_snd); \ 393130831Srwatson sowwakeup_locked(so); \ 394130831Srwatson} while (0) 395130831Srwatson 39638482Swollman/* 39738482Swollman * Argument structure for sosetopt et seq. This is in the KERNEL 39838482Swollman * section because it will never be visible to user code. 39938482Swollman */ 40038482Swollmanenum sopt_dir { SOPT_GET, SOPT_SET }; 40138482Swollmanstruct sockopt { 40238482Swollman enum sopt_dir sopt_dir; /* is this a get or a set? */ 40338482Swollman int sopt_level; /* second arg of [gs]etsockopt */ 40438482Swollman int sopt_name; /* third arg of [gs]etsockopt */ 40538482Swollman void *sopt_val; /* fourth arg of [gs]etsockopt */ 40638482Swollman size_t sopt_valsize; /* (almost) fifth arg of [gs]etsockopt */ 40795959Salfred struct thread *sopt_td; /* calling thread or null if kernel */ 40838482Swollman}; 40938482Swollman 41061837Salfredstruct accept_filter { 41161837Salfred char accf_name[16]; 41261837Salfred void (*accf_callback) 41392719Salfred (struct socket *so, void *arg, int waitflag); 41461837Salfred void * (*accf_create) 41592719Salfred (struct socket *so, char *arg); 41661837Salfred void (*accf_destroy) 41792719Salfred (struct socket *so); 41895959Salfred SLIST_ENTRY(accept_filter) accf_next; 41982656Sjlemon}; 42061837Salfred 42131927Sbde#ifdef MALLOC_DECLARE 42295959SalfredMALLOC_DECLARE(M_ACCF); 42331927SbdeMALLOC_DECLARE(M_PCB); 42431927SbdeMALLOC_DECLARE(M_SONAME); 42531927Sbde#endif 42631927Sbde 42795959Salfredextern int maxsockets; 4282112Swollmanextern u_long sb_max; 42995959Salfredextern struct uma_zone *socket_zone; 43036079Swollmanextern so_gen_t so_gencnt; 43114505Shsu 43215492Sbdestruct mbuf; 43315492Sbdestruct sockaddr; 43432995Sbdestruct ucred; 43532995Sbdestruct uio; 43615492Sbde 4371541Srgrimes/* 4383304Sphk * From uipc_socket and friends 4393304Sphk */ 44092719Salfredint sockargs(struct mbuf **mp, caddr_t buf, int buflen, int type); 44192719Salfredint getsockaddr(struct sockaddr **namp, caddr_t uaddr, size_t len); 44292719Salfredvoid sbappend(struct sockbuf *sb, struct mbuf *m); 443130831Srwatsonvoid sbappend_locked(struct sockbuf *sb, struct mbuf *m); 444121628Ssamvoid sbappendstream(struct sockbuf *sb, struct mbuf *m); 445130831Srwatsonvoid sbappendstream_locked(struct sockbuf *sb, struct mbuf *m); 446130050Srwatsonint sbappendaddr(struct sockbuf *sb, const struct sockaddr *asa, 44792719Salfred struct mbuf *m0, struct mbuf *control); 448130831Srwatsonint sbappendaddr_locked(struct sockbuf *sb, const struct sockaddr *asa, 449130831Srwatson struct mbuf *m0, struct mbuf *control); 45092719Salfredint sbappendcontrol(struct sockbuf *sb, struct mbuf *m0, 45192719Salfred struct mbuf *control); 452130831Srwatsonint sbappendcontrol_locked(struct sockbuf *sb, struct mbuf *m0, 453130831Srwatson struct mbuf *control); 45492719Salfredvoid sbappendrecord(struct sockbuf *sb, struct mbuf *m0); 455130831Srwatsonvoid sbappendrecord_locked(struct sockbuf *sb, struct mbuf *m0); 45692719Salfredvoid sbcheck(struct sockbuf *sb); 45792719Salfredvoid sbcompress(struct sockbuf *sb, struct mbuf *m, struct mbuf *n); 45819670Sbdestruct mbuf * 45992719Salfred sbcreatecontrol(caddr_t p, int size, int type, int level); 46092719Salfredvoid sbdrop(struct sockbuf *sb, int len); 461130831Srwatsonvoid sbdrop_locked(struct sockbuf *sb, int len); 46292719Salfredvoid sbdroprecord(struct sockbuf *sb); 463130831Srwatsonvoid sbdroprecord_locked(struct sockbuf *sb); 46492719Salfredvoid sbflush(struct sockbuf *sb); 465130831Srwatsonvoid sbflush_locked(struct sockbuf *sb); 46692719Salfredvoid sbinsertoob(struct sockbuf *sb, struct mbuf *m0); 467130831Srwatsonvoid sbinsertoob_locked(struct sockbuf *sb, struct mbuf *m0); 46892719Salfredvoid sbrelease(struct sockbuf *sb, struct socket *so); 469130831Srwatsonvoid sbrelease_locked(struct sockbuf *sb, struct socket *so); 47092719Salfredint sbreserve(struct sockbuf *sb, u_long cc, struct socket *so, 47193008Sbde struct thread *td); 472131006Srwatsonint sbreserve_locked(struct sockbuf *sb, u_long cc, struct socket *so, 473131006Srwatson struct thread *td); 47492719Salfredvoid sbtoxsockbuf(struct sockbuf *sb, struct xsockbuf *xsb); 47592719Salfredint sbwait(struct sockbuf *sb); 47692719Salfredint sb_lock(struct sockbuf *sb); 47792719Salfredint soabort(struct socket *so); 47892719Salfredint soaccept(struct socket *so, struct sockaddr **nam); 479126411Srwatsonstruct socket *soalloc(int mflags); 48095959Salfredint socheckuid(struct socket *so, uid_t uid); 48192719Salfredint sobind(struct socket *so, struct sockaddr *nam, struct thread *td); 48292719Salfredvoid socantrcvmore(struct socket *so); 483130831Srwatsonvoid socantrcvmore_locked(struct socket *so); 48492719Salfredvoid socantsendmore(struct socket *so); 485130831Srwatsonvoid socantsendmore_locked(struct socket *so); 48692719Salfredint soclose(struct socket *so); 48792719Salfredint soconnect(struct socket *so, struct sockaddr *nam, struct thread *td); 48892719Salfredint soconnect2(struct socket *so1, struct socket *so2); 48998849Skenint socow_setup(struct mbuf *m0, struct uio *uio); 49092719Salfredint socreate(int dom, struct socket **aso, int type, int proto, 49192719Salfred struct ucred *cred, struct thread *td); 492106326Salcvoid sodealloc(struct socket *so); 49392719Salfredint sodisconnect(struct socket *so); 494126425Srwatsonstruct sockaddr *sodupsockaddr(const struct sockaddr *sa, int mflags); 49592719Salfredvoid sofree(struct socket *so); 49692719Salfredint sogetopt(struct socket *so, struct sockopt *sopt); 49792719Salfredvoid sohasoutofband(struct socket *so); 49892719Salfredvoid soisconnected(struct socket *so); 49992719Salfredvoid soisconnecting(struct socket *so); 50092719Salfredvoid soisdisconnected(struct socket *so); 50192719Salfredvoid soisdisconnecting(struct socket *so); 50292719Salfredint solisten(struct socket *so, int backlog, struct thread *td); 50314505Shsustruct socket * 50492719Salfred sonewconn(struct socket *head, int connstatus); 50593008Sbdeint sooptcopyin(struct sockopt *sopt, void *buf, size_t len, size_t minlen); 506118453Shsuint sooptcopyout(struct sockopt *sopt, const void *buf, size_t len); 50753541Sshin 50853541Sshin/* XXX; prepare mbuf for (__FreeBSD__ < 3) routines. */ 50992719Salfredint soopt_getm(struct sockopt *sopt, struct mbuf **mp); 51092719Salfredint soopt_mcopyin(struct sockopt *sopt, struct mbuf *m); 51192719Salfredint soopt_mcopyout(struct sockopt *sopt, struct mbuf *m); 51253541Sshin 513101983Srwatsonint sopoll(struct socket *so, int events, struct ucred *active_cred, 51493008Sbde struct thread *td); 51593008Sbdeint soreceive(struct socket *so, struct sockaddr **paddr, struct uio *uio, 51693008Sbde struct mbuf **mp0, struct mbuf **controlp, int *flagsp); 51792719Salfredint soreserve(struct socket *so, u_long sndcc, u_long rcvcc); 51892719Salfredvoid sorflush(struct socket *so); 51992719Salfredint sosend(struct socket *so, struct sockaddr *addr, struct uio *uio, 52093008Sbde struct mbuf *top, struct mbuf *control, int flags, 52193008Sbde struct thread *td); 52292719Salfredint sosetopt(struct socket *so, struct sockopt *sopt); 52392719Salfredint soshutdown(struct socket *so, int how); 52492719Salfredvoid sotoxsocket(struct socket *so, struct xsocket *xso); 52592719Salfredvoid sowakeup(struct socket *so, struct sockbuf *sb); 52631927Sbde 527121628Ssam#ifdef SOCKBUF_DEBUG 528121628Ssamvoid sblastrecordchk(struct sockbuf *, const char *, int); 529121628Ssam#define SBLASTRECORDCHK(sb) sblastrecordchk((sb), __FILE__, __LINE__) 530121628Ssam 531121628Ssamvoid sblastmbufchk(struct sockbuf *, const char *, int); 532121628Ssam#define SBLASTMBUFCHK(sb) sblastmbufchk((sb), __FILE__, __LINE__) 533121628Ssam#else 534121628Ssam#define SBLASTRECORDCHK(sb) /* nothing */ 535121628Ssam#define SBLASTMBUFCHK(sb) /* nothing */ 536121628Ssam#endif /* SOCKBUF_DEBUG */ 537121628Ssam 53895959Salfred/* 53995959Salfred * Accept filter functions (duh). 54095959Salfred */ 54192719Salfredint accept_filt_add(struct accept_filter *filt); 54292719Salfredint accept_filt_del(char *name); 54395959Salfredstruct accept_filter *accept_filt_get(char *name); 54461837Salfred#ifdef ACCEPT_FILTER_MOD 54595959Salfred#ifdef SYSCTL_DECL 54665534SalfredSYSCTL_DECL(_net_inet_accf); 54795959Salfred#endif 54895959Salfredint accept_filt_generic_mod_event(module_t mod, int event, void *data); 54995959Salfred#endif 55061837Salfred 55155205Speter#endif /* _KERNEL */ 5522165Spaul 55314505Shsu#endif /* !_SYS_SOCKETVAR_H_ */ 554