socketvar.h revision 18787
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 * 3. All advertising materials mentioning features or use of this software 141541Srgrimes * must display the following acknowledgement: 151541Srgrimes * This product includes software developed by the University of 161541Srgrimes * California, Berkeley and its contributors. 171541Srgrimes * 4. Neither the name of the University nor the names of its contributors 181541Srgrimes * may be used to endorse or promote products derived from this software 191541Srgrimes * without specific prior written permission. 201541Srgrimes * 211541Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 221541Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 231541Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 241541Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 251541Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 261541Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 271541Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 281541Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 291541Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 301541Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 311541Srgrimes * SUCH DAMAGE. 321541Srgrimes * 3314505Shsu * @(#)socketvar.h 8.3 (Berkeley) 2/19/95 3418787Spst * $Id: socketvar.h,v 1.14 1996/05/01 01:53:59 bde Exp $ 351541Srgrimes */ 361541Srgrimes 372165Spaul#ifndef _SYS_SOCKETVAR_H_ 382165Spaul#define _SYS_SOCKETVAR_H_ 392165Spaul 4015492Sbde#include <sys/queue.h> /* for TAILQ macros */ 411541Srgrimes#include <sys/select.h> /* for struct selinfo */ 421541Srgrimes 431541Srgrimes/* 441541Srgrimes * Kernel structure per socket. 451541Srgrimes * Contains send and receive buffer queues, 461541Srgrimes * handle on protocol and pointer to protocol 471541Srgrimes * private data and error information. 481541Srgrimes */ 491541Srgrimesstruct socket { 501541Srgrimes short so_type; /* generic type, see socket.h */ 511541Srgrimes short so_options; /* from socket call, see socket.h */ 521541Srgrimes short so_linger; /* time to linger while closing */ 531541Srgrimes short so_state; /* internal state flags SS_*, below */ 541541Srgrimes caddr_t so_pcb; /* protocol control block */ 551541Srgrimes struct protosw *so_proto; /* protocol handle */ 561541Srgrimes/* 5713765Smpp * Variables for connection queuing. 581541Srgrimes * Socket where accepts occur is so_head in all subsidiary sockets. 591541Srgrimes * If so_head is 0, socket is not related to an accept. 601541Srgrimes * For head socket so_q0 queues partially completed connections, 611541Srgrimes * while so_q is a queue of connections ready to be accepted. 621541Srgrimes * If a connection is aborted and it has so_head set, then 631541Srgrimes * it has to be pulled out of either so_q0 or so_q. 641541Srgrimes * We allow connections to queue up based on current queue lengths 651541Srgrimes * and limit on number of queued connections for this socket. 661541Srgrimes */ 671541Srgrimes struct socket *so_head; /* back pointer to accept socket */ 6814547Sdg TAILQ_HEAD(, socket) so_incomp; /* queue of partial unaccepted connections */ 6914547Sdg TAILQ_HEAD(, socket) so_comp; /* queue of complete unaccepted connections */ 7014547Sdg TAILQ_ENTRY(socket) so_list; /* list of unaccepted connections */ 7114547Sdg short so_qlen; /* number of unaccepted connections */ 7218787Spst short so_incqlen; /* number of unaccepted incomplete 7318787Spst connections */ 741541Srgrimes short so_qlimit; /* max number queued connections */ 751541Srgrimes short so_timeo; /* connection timeout */ 761541Srgrimes u_short so_error; /* error affecting connection */ 771541Srgrimes pid_t so_pgid; /* pgid for signals */ 781541Srgrimes u_long so_oobmark; /* chars to oob mark */ 791541Srgrimes/* 801541Srgrimes * Variables for socket buffering. 811541Srgrimes */ 821541Srgrimes struct sockbuf { 831541Srgrimes u_long sb_cc; /* actual chars in buffer */ 841541Srgrimes u_long sb_hiwat; /* max actual char count */ 851541Srgrimes u_long sb_mbcnt; /* chars of mbufs used */ 861541Srgrimes u_long sb_mbmax; /* max chars of mbufs to use */ 871541Srgrimes long sb_lowat; /* low water mark */ 881541Srgrimes struct mbuf *sb_mb; /* the mbuf chain */ 891541Srgrimes struct selinfo sb_sel; /* process selecting read/write */ 901541Srgrimes short sb_flags; /* flags, see below */ 911541Srgrimes short sb_timeo; /* timeout for read/write */ 921541Srgrimes } so_rcv, so_snd; 931541Srgrimes#define SB_MAX (256*1024) /* default for max chars in sockbuf */ 941541Srgrimes#define SB_LOCK 0x01 /* lock on data queue */ 951541Srgrimes#define SB_WANT 0x02 /* someone is waiting to lock */ 961541Srgrimes#define SB_WAIT 0x04 /* someone is waiting for data/space */ 971541Srgrimes#define SB_SEL 0x08 /* someone is selecting */ 981541Srgrimes#define SB_ASYNC 0x10 /* ASYNC I/O, need signals */ 991541Srgrimes#define SB_NOTIFY (SB_WAIT|SB_SEL|SB_ASYNC) 1001541Srgrimes#define SB_NOINTR 0x40 /* operations not interruptible */ 1011541Srgrimes 1021541Srgrimes caddr_t so_tpcb; /* Wisc. protocol control block XXX */ 1031541Srgrimes void (*so_upcall) __P((struct socket *so, caddr_t arg, int waitf)); 1041541Srgrimes caddr_t so_upcallarg; /* Arg for above */ 1051541Srgrimes}; 1061541Srgrimes 1071541Srgrimes/* 1081541Srgrimes * Socket state bits. 1091541Srgrimes */ 11014547Sdg#define SS_NOFDREF 0x0001 /* no file table ref any more */ 11114547Sdg#define SS_ISCONNECTED 0x0002 /* socket connected to a peer */ 11214547Sdg#define SS_ISCONNECTING 0x0004 /* in process of connecting to peer */ 11314547Sdg#define SS_ISDISCONNECTING 0x0008 /* in process of disconnecting */ 11414547Sdg#define SS_CANTSENDMORE 0x0010 /* can't send more data to peer */ 11514547Sdg#define SS_CANTRCVMORE 0x0020 /* can't receive more data from peer */ 11614547Sdg#define SS_RCVATMARK 0x0040 /* at mark on input */ 1171541Srgrimes 11814547Sdg#define SS_PRIV 0x0080 /* privileged for broadcast, raw... */ 11914547Sdg#define SS_NBIO 0x0100 /* non-blocking ops */ 12014547Sdg#define SS_ASYNC 0x0200 /* async i/o notify */ 12114547Sdg#define SS_ISCONFIRMING 0x0400 /* deciding to accept connection req */ 1221541Srgrimes 12314547Sdg#define SS_INCOMP 0x0800 /* unaccepted, incomplete connection */ 12414547Sdg#define SS_COMP 0x1000 /* unaccepted, complete connection */ 1251541Srgrimes 12614547Sdg 1271541Srgrimes/* 1281541Srgrimes * Macros for sockets and socket buffering. 1291541Srgrimes */ 1301541Srgrimes 1311541Srgrimes/* 1321541Srgrimes * How much space is there in a socket buffer (so->so_snd or so->so_rcv)? 1331541Srgrimes * This is problematical if the fields are unsigned, as the space might 1341541Srgrimes * still be negative (cc > hiwat or mbcnt > mbmax). Should detect 1351541Srgrimes * overflow and return 0. Should use "lmin" but it doesn't exist now. 1361541Srgrimes */ 1371541Srgrimes#define sbspace(sb) \ 1381541Srgrimes ((long) imin((int)((sb)->sb_hiwat - (sb)->sb_cc), \ 1391541Srgrimes (int)((sb)->sb_mbmax - (sb)->sb_mbcnt))) 1401541Srgrimes 1411541Srgrimes/* do we have to send all at once on a socket? */ 1421541Srgrimes#define sosendallatonce(so) \ 1431541Srgrimes ((so)->so_proto->pr_flags & PR_ATOMIC) 1441541Srgrimes 1451541Srgrimes/* can we read something from so? */ 1461541Srgrimes#define soreadable(so) \ 1471541Srgrimes ((so)->so_rcv.sb_cc >= (so)->so_rcv.sb_lowat || \ 1481541Srgrimes ((so)->so_state & SS_CANTRCVMORE) || \ 14914547Sdg (so)->so_comp.tqh_first || (so)->so_error) 1501541Srgrimes 1511541Srgrimes/* can we write something to so? */ 1521541Srgrimes#define sowriteable(so) \ 1533304Sphk ((sbspace(&(so)->so_snd) >= (so)->so_snd.sb_lowat && \ 1541541Srgrimes (((so)->so_state&SS_ISCONNECTED) || \ 1553304Sphk ((so)->so_proto->pr_flags&PR_CONNREQUIRED)==0)) || \ 1561541Srgrimes ((so)->so_state & SS_CANTSENDMORE) || \ 1571541Srgrimes (so)->so_error) 1581541Srgrimes 1591541Srgrimes/* adjust counters in sb reflecting allocation of m */ 1601541Srgrimes#define sballoc(sb, m) { \ 1611541Srgrimes (sb)->sb_cc += (m)->m_len; \ 1621541Srgrimes (sb)->sb_mbcnt += MSIZE; \ 1631541Srgrimes if ((m)->m_flags & M_EXT) \ 1641541Srgrimes (sb)->sb_mbcnt += (m)->m_ext.ext_size; \ 1651541Srgrimes} 1661541Srgrimes 1671541Srgrimes/* adjust counters in sb reflecting freeing of m */ 1681541Srgrimes#define sbfree(sb, m) { \ 1691541Srgrimes (sb)->sb_cc -= (m)->m_len; \ 1701541Srgrimes (sb)->sb_mbcnt -= MSIZE; \ 1711541Srgrimes if ((m)->m_flags & M_EXT) \ 1721541Srgrimes (sb)->sb_mbcnt -= (m)->m_ext.ext_size; \ 1731541Srgrimes} 1741541Srgrimes 1751541Srgrimes/* 1761541Srgrimes * Set lock on sockbuf sb; sleep if lock is already held. 1771541Srgrimes * Unless SB_NOINTR is set on sockbuf, sleep is interruptible. 1781541Srgrimes * Returns error without lock if sleep is interrupted. 1791541Srgrimes */ 1801541Srgrimes#define sblock(sb, wf) ((sb)->sb_flags & SB_LOCK ? \ 1811541Srgrimes (((wf) == M_WAITOK) ? sb_lock(sb) : EWOULDBLOCK) : \ 1821541Srgrimes ((sb)->sb_flags |= SB_LOCK), 0) 1831541Srgrimes 1841541Srgrimes/* release lock on sockbuf sb */ 1851541Srgrimes#define sbunlock(sb) { \ 1861541Srgrimes (sb)->sb_flags &= ~SB_LOCK; \ 1871541Srgrimes if ((sb)->sb_flags & SB_WANT) { \ 1881541Srgrimes (sb)->sb_flags &= ~SB_WANT; \ 1891541Srgrimes wakeup((caddr_t)&(sb)->sb_flags); \ 1901541Srgrimes } \ 1911541Srgrimes} 1921541Srgrimes 1931541Srgrimes#define sorwakeup(so) { sowakeup((so), &(so)->so_rcv); \ 1941541Srgrimes if ((so)->so_upcall) \ 1951541Srgrimes (*((so)->so_upcall))((so), (so)->so_upcallarg, M_DONTWAIT); \ 1961541Srgrimes } 1971541Srgrimes 1981541Srgrimes#define sowwakeup(so) sowakeup((so), &(so)->so_snd) 1991541Srgrimes 2001541Srgrimes#ifdef KERNEL 2012112Swollmanextern u_long sb_max; 20214505Shsu 2031541Srgrimes/* to catch callers missing new second argument to sonewconn: */ 2041541Srgrimes#define sonewconn(head, connstatus) sonewconn1((head), (connstatus)) 2051541Srgrimes 20615492Sbdestruct filedesc; 20715492Sbdestruct mbuf; 20815492Sbdestruct sockaddr; 20915492Sbdestruct stat; 21015492Sbde 2111541Srgrimes/* 2121541Srgrimes * File operations on sockets. 2131541Srgrimes */ 21414505Shsuint soo_ioctl __P((struct file *fp, int cmd, caddr_t data, 21514505Shsu struct proc *p)); 2161541Srgrimesint soo_select __P((struct file *fp, int which, struct proc *p)); 21714505Shsuint soo_stat __P((struct socket *so, struct stat *ub)); 2183304Sphk 2193304Sphk/* 2203304Sphk * From uipc_socket and friends 2213304Sphk */ 22214505Shsuint getsock __P((struct filedesc *fdp, int fdes, struct file **fpp)); 22314505Shsuint sockargs __P((struct mbuf **mp, caddr_t buf, int buflen, int type)); 22414505Shsuvoid sbappend __P((struct sockbuf *sb, struct mbuf *m)); 22514505Shsuint sbappendaddr __P((struct sockbuf *sb, struct sockaddr *asa, 22614505Shsu struct mbuf *m0, struct mbuf *control)); 22714505Shsuint sbappendcontrol __P((struct sockbuf *sb, struct mbuf *m0, 22814505Shsu struct mbuf *control)); 22914505Shsuvoid sbappendrecord __P((struct sockbuf *sb, struct mbuf *m0)); 23014505Shsuvoid sbcheck __P((struct sockbuf *sb)); 23114505Shsuvoid sbcompress __P((struct sockbuf *sb, struct mbuf *m, struct mbuf *n)); 23214505Shsuvoid sbdrop __P((struct sockbuf *sb, int len)); 23314505Shsuvoid sbdroprecord __P((struct sockbuf *sb)); 23414505Shsuvoid sbflush __P((struct sockbuf *sb)); 23514505Shsuvoid sbinsertoob __P((struct sockbuf *sb, struct mbuf *m0)); 23614505Shsuvoid sbrelease __P((struct sockbuf *sb)); 23714505Shsuint sbreserve __P((struct sockbuf *sb, u_long cc)); 23814505Shsuint sbwait __P((struct sockbuf *sb)); 23914505Shsuint sb_lock __P((struct sockbuf *sb)); 24014505Shsuint soabort __P((struct socket *so)); 24114505Shsuint soaccept __P((struct socket *so, struct mbuf *nam)); 24214505Shsuint sobind __P((struct socket *so, struct mbuf *nam)); 24314505Shsuvoid socantrcvmore __P((struct socket *so)); 24414505Shsuvoid socantsendmore __P((struct socket *so)); 24514505Shsuint soclose __P((struct socket *so)); 24614505Shsuint soconnect __P((struct socket *so, struct mbuf *nam)); 24714505Shsuint soconnect2 __P((struct socket *so1, struct socket *so2)); 24814505Shsuint socreate __P((int dom, struct socket **aso, int type, int proto, 24914505Shsu struct proc *p)); 25014505Shsuint sodisconnect __P((struct socket *so)); 25114505Shsuvoid sofree __P((struct socket *so)); 25214505Shsuint sogetopt __P((struct socket *so, int level, int optname, 25314505Shsu struct mbuf **mp)); 25414505Shsuvoid sohasoutofband __P((struct socket *so)); 25514505Shsuvoid soisconnected __P((struct socket *so)); 25614505Shsuvoid soisconnecting __P((struct socket *so)); 25714505Shsuvoid soisdisconnected __P((struct socket *so)); 25814505Shsuvoid soisdisconnecting __P((struct socket *so)); 25914505Shsuint solisten __P((struct socket *so, int backlog)); 26014505Shsustruct socket * 26118787Spst sodropablereq __P((struct socket *head)); 26218787Spststruct socket * 26314505Shsu sonewconn1 __P((struct socket *head, int connstatus)); 26414505Shsuint soreceive __P((struct socket *so, struct mbuf **paddr, struct uio *uio, 26514505Shsu struct mbuf **mp0, struct mbuf **controlp, int *flagsp)); 26614505Shsuint soreserve __P((struct socket *so, u_long sndcc, u_long rcvcc)); 26714505Shsuvoid sorflush __P((struct socket *so)); 26814505Shsuint sosend __P((struct socket *so, struct mbuf *addr, struct uio *uio, 26914505Shsu struct mbuf *top, struct mbuf *control, int flags)); 27014505Shsuint sosetopt __P((struct socket *so, int level, int optname, 27114505Shsu struct mbuf *m0)); 27214505Shsuint soshutdown __P((struct socket *so, int how)); 27314505Shsuvoid sowakeup __P((struct socket *so, struct sockbuf *sb)); 27414505Shsu#endif /* KERNEL */ 2752165Spaul 27614505Shsu#endif /* !_SYS_SOCKETVAR_H_ */ 277