Annotation of src/sys/sys/socketvar.h, Revision 1.126.6.1
1.126.6.1! mrg 1: /* $NetBSD: socketvar.h,v 1.129 2012/02/01 02:27:23 matt Exp $ */
1.105 ad 2:
3: /*-
1.119 ad 4: * Copyright (c) 2008, 2009 The NetBSD Foundation, Inc.
1.105 ad 5: * All rights reserved.
6: *
1.119 ad 7: * This code is derived from software contributed to The NetBSD Foundation
8: * by Andrew Doran.
9: *
1.105 ad 10: * Redistribution and use in source and binary forms, with or without
11: * modification, are permitted provided that the following conditions
12: * are met:
13: * 1. Redistributions of source code must retain the above copyright
14: * notice, this list of conditions and the following disclaimer.
15: * 2. Redistributions in binary form must reproduce the above copyright
16: * notice, this list of conditions and the following disclaimer in the
17: * documentation and/or other materials provided with the distribution.
18: *
19: * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29: * POSSIBILITY OF SUCH DAMAGE.
30: */
1.11 cgd 31:
1.1 cgd 32: /*-
1.8 mycroft 33: * Copyright (c) 1982, 1986, 1990, 1993
34: * The Regents of the University of California. All rights reserved.
1.1 cgd 35: *
36: * Redistribution and use in source and binary forms, with or without
37: * modification, are permitted provided that the following conditions
38: * are met:
39: * 1. Redistributions of source code must retain the above copyright
40: * notice, this list of conditions and the following disclaimer.
41: * 2. Redistributions in binary form must reproduce the above copyright
42: * notice, this list of conditions and the following disclaimer in the
43: * documentation and/or other materials provided with the distribution.
1.65 agc 44: * 3. Neither the name of the University nor the names of its contributors
1.1 cgd 45: * may be used to endorse or promote products derived from this software
46: * without specific prior written permission.
47: *
48: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
49: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
50: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
51: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
52: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
53: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
54: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
55: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
56: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
57: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
58: * SUCH DAMAGE.
59: *
1.28 fvdl 60: * @(#)socketvar.h 8.3 (Berkeley) 2/19/95
1.1 cgd 61: */
62:
1.24 mikel 63: #ifndef _SYS_SOCKETVAR_H_
1.42 lukem 64: #define _SYS_SOCKETVAR_H_
1.24 mikel 65:
1.81 kleink 66: #include <sys/select.h>
67: #include <sys/selinfo.h> /* for struct selinfo */
1.27 thorpej 68: #include <sys/queue.h>
1.105 ad 69: #include <sys/mutex.h>
70: #include <sys/condvar.h>
1.27 thorpej 71:
1.114 pooka 72: #if !defined(_KERNEL)
1.29 matt 73: struct uio;
1.85 christos 74: struct lwp;
1.82 christos 75: struct uidinfo;
1.115 pooka 76: #else
77: #include <sys/uidinfo.h>
1.29 matt 78: #endif
79:
1.27 thorpej 80: TAILQ_HEAD(soqhead, socket);
1.3 mycroft 81:
1.1 cgd 82: /*
1.58 matt 83: * Variables for socket buffering.
84: */
85: struct sockbuf {
1.66 wrstuden 86: struct selinfo sb_sel; /* process selecting read/write */
87: struct mowner *sb_mowner; /* who owns data for this sockbuf */
1.105 ad 88: struct socket *sb_so; /* back pointer to socket */
89: kcondvar_t sb_cv; /* notifier */
1.66 wrstuden 90: /* When re-zeroing this struct, we zero from sb_startzero to the end */
91: #define sb_startzero sb_cc
1.58 matt 92: u_long sb_cc; /* actual chars in buffer */
93: u_long sb_hiwat; /* max actual char count */
94: u_long sb_mbcnt; /* chars of mbufs used */
95: u_long sb_mbmax; /* max chars of mbufs to use */
96: long sb_lowat; /* low water mark */
97: struct mbuf *sb_mb; /* the mbuf chain */
98: struct mbuf *sb_mbtail; /* the last mbuf in the chain */
99: struct mbuf *sb_lastrecord; /* first mbuf of last record in
100: socket buffer */
1.79 yamt 101: int sb_flags; /* flags, see below */
102: int sb_timeo; /* timeout for read/write */
1.80 darrenr 103: u_long sb_overflowed; /* # of drops due to full buffer */
1.58 matt 104: };
105:
106: #ifndef SB_MAX
107: #define SB_MAX (256*1024) /* default for max chars in sockbuf */
108: #endif
109:
110: #define SB_LOCK 0x01 /* lock on data queue */
1.105 ad 111: #define SB_NOTIFY 0x04 /* someone is waiting for data/space */
1.58 matt 112: #define SB_ASYNC 0x10 /* ASYNC I/O, need signals */
113: #define SB_UPCALL 0x20 /* someone wants an upcall */
114: #define SB_NOINTR 0x40 /* operations not interruptible */
115: #define SB_KNOTE 0x100 /* kernel note attached */
1.98 rmind 116: #define SB_AUTOSIZE 0x800 /* automatically size socket buffer */
1.58 matt 117:
118: /*
1.1 cgd 119: * Kernel structure per socket.
120: * Contains send and receive buffer queues,
121: * handle on protocol and pointer to protocol
122: * private data and error information.
123: */
124: struct socket {
1.105 ad 125: kmutex_t * volatile so_lock; /* pointer to lock on structure */
126: kcondvar_t so_cv; /* notifier */
1.42 lukem 127: short so_type; /* generic type, see socket.h */
128: short so_options; /* from socket call, see socket.h */
1.92 christos 129: u_short so_linger; /* time to linger while closing */
1.42 lukem 130: short so_state; /* internal state flags SS_*, below */
1.126.6.1! mrg 131: int so_unused; /* used to be so_nbio */
1.42 lukem 132: void *so_pcb; /* protocol control block */
1.74 matt 133: const struct protosw *so_proto; /* protocol handle */
1.1 cgd 134: /*
135: * Variables for connection queueing.
136: * Socket where accepts occur is so_head in all subsidiary sockets.
137: * If so_head is 0, socket is not related to an accept.
138: * For head socket so_q0 queues partially completed connections,
139: * while so_q is a queue of connections ready to be accepted.
140: * If a connection is aborted and it has so_head set, then
141: * it has to be pulled out of either so_q0 or so_q.
142: * We allow connections to queue up based on current queue lengths
143: * and limit on number of queued connections for this socket.
144: */
1.42 lukem 145: struct socket *so_head; /* back pointer to accept socket */
146: struct soqhead *so_onq; /* queue (q or q0) that we're on */
147: struct soqhead so_q0; /* queue of partial connections */
148: struct soqhead so_q; /* queue of incoming connections */
1.27 thorpej 149: TAILQ_ENTRY(socket) so_qe; /* our queue entry (q or q0) */
1.42 lukem 150: short so_q0len; /* partials on so_q0 */
151: short so_qlen; /* number of connections on so_q */
152: short so_qlimit; /* max number queued connections */
153: short so_timeo; /* connection timeout */
154: u_short so_error; /* error affecting connection */
1.106 ad 155: u_short so_aborting; /* references from soabort() */
1.42 lukem 156: pid_t so_pgid; /* pgid for signals */
157: u_long so_oobmark; /* chars to oob mark */
1.58 matt 158: struct sockbuf so_snd; /* send buffer */
159: struct sockbuf so_rcv; /* receive buffer */
1.1 cgd 160:
1.42 lukem 161: void *so_internal; /* Space for svr4 stream data */
1.120 tls 162: void (*so_upcall) (struct socket *, void *, int, int);
1.93 christos 163: void * so_upcallarg; /* Arg for above */
1.71 matt 164: int (*so_send) (struct socket *, struct mbuf *,
1.64 itojun 165: struct uio *, struct mbuf *,
1.83 christos 166: struct mbuf *, int, struct lwp *);
1.71 matt 167: int (*so_receive) (struct socket *,
1.64 itojun 168: struct mbuf **,
169: struct uio *, struct mbuf **,
1.71 matt 170: struct mbuf **, int *);
1.58 matt 171: struct mowner *so_mowner; /* who owns mbufs for this socket */
1.82 christos 172: struct uidinfo *so_uidinfo; /* who opened the socket */
1.111 yamt 173: gid_t so_egid; /* creator effective gid */
174: pid_t so_cpid; /* creator pid */
1.112 tls 175: struct so_accf {
176: struct accept_filter *so_accept_filter;
177: void *so_accept_filter_arg; /* saved filter args */
178: char *so_accept_filter_str; /* saved user args */
179: } *so_accf;
1.124 elad 180: kauth_cred_t so_cred; /* socket credentials */
1.1 cgd 181: };
182:
1.54 thorpej 183: #define SB_EMPTY_FIXUP(sb) \
1.52 thorpej 184: do { \
1.105 ad 185: KASSERT(solocked((sb)->sb_so)); \
1.52 thorpej 186: if ((sb)->sb_mb == NULL) { \
187: (sb)->sb_mbtail = NULL; \
188: (sb)->sb_lastrecord = NULL; \
189: } \
190: } while (/*CONSTCOND*/0)
191:
1.1 cgd 192: /*
193: * Socket state bits.
194: */
195: #define SS_NOFDREF 0x001 /* no file table ref any more */
196: #define SS_ISCONNECTED 0x002 /* socket connected to a peer */
197: #define SS_ISCONNECTING 0x004 /* in process of connecting to peer */
198: #define SS_ISDISCONNECTING 0x008 /* in process of disconnecting */
199: #define SS_CANTSENDMORE 0x010 /* can't send more data to peer */
200: #define SS_CANTRCVMORE 0x020 /* can't receive more data from peer */
201: #define SS_RCVATMARK 0x040 /* at mark on input */
1.122 dsl 202: #define SS_ISABORTING 0x080 /* aborting fd references - close() */
1.123 dsl 203: #define SS_RESTARTSYS 0x100 /* restart blocked system calls */
1.33 mycroft 204: #define SS_ISDISCONNECTED 0x800 /* socket disconnected from peer */
1.1 cgd 205:
1.19 mycroft 206: #define SS_ASYNC 0x100 /* async i/o notify */
207: #define SS_ISCONFIRMING 0x200 /* deciding to accept connection req */
1.42 lukem 208: #define SS_MORETOCOME 0x400 /*
209: * hint from sosend to lower layer;
210: * more data coming
211: */
1.94 yamt 212: #define SS_ISAPIPE 0x1000 /* socket is implementing a pipe */
1.126.6.1! mrg 213: #define SS_NBIO 0x2000 /* socket is in non blocking I/O */
1.1 cgd 214:
1.105 ad 215: #ifdef _KERNEL
1.1 cgd 216:
1.112 tls 217: struct accept_filter {
218: char accf_name[16];
219: void (*accf_callback)
1.120 tls 220: (struct socket *, void *, int, int);
1.112 tls 221: void * (*accf_create)
1.120 tls 222: (struct socket *, char *);
1.112 tls 223: void (*accf_destroy)
1.120 tls 224: (struct socket *);
1.116 ad 225: LIST_ENTRY(accept_filter) accf_next;
226: u_int accf_refcnt;
1.112 tls 227: };
228:
1.113 plunky 229: struct sockopt {
230: int sopt_level; /* option level */
231: int sopt_name; /* option name */
232: size_t sopt_size; /* data length */
233: void * sopt_data; /* data pointer */
234: uint8_t sopt_buf[sizeof(int)]; /* internal storage */
235: };
236:
1.42 lukem 237: extern u_long sb_max;
1.63 ragge 238: extern int somaxkva;
1.88 yamt 239: extern int sock_loan_thresh;
1.105 ad 240: extern kmutex_t *softnet_lock;
1.31 thorpej 241:
1.17 christos 242: struct mbuf;
243: struct sockaddr;
1.84 christos 244: struct lwp;
1.17 christos 245: struct msghdr;
246: struct stat;
1.55 jdolecek 247: struct knote;
1.17 christos 248:
1.100 dyoung 249: struct mbuf *getsombuf(struct socket *, int);
1.99 dyoung 250:
1.1 cgd 251: /*
252: * File operations on sockets.
253: */
1.104 ad 254: int soo_read(file_t *, off_t *, struct uio *, kauth_cred_t, int);
255: int soo_write(file_t *, off_t *, struct uio *, kauth_cred_t, int);
256: int soo_fcntl(file_t *, u_int cmd, void *);
257: int soo_ioctl(file_t *, u_long cmd, void *);
258: int soo_poll(file_t *, int);
259: int soo_kqfilter(file_t *, struct knote *);
260: int soo_close(file_t *);
261: int soo_stat(file_t *, struct stat *);
1.123 dsl 262: void soo_restart(file_t *);
1.64 itojun 263: void sbappend(struct sockbuf *, struct mbuf *);
264: void sbappendstream(struct sockbuf *, struct mbuf *);
1.73 matt 265: int sbappendaddr(struct sockbuf *, const struct sockaddr *, struct mbuf *,
1.64 itojun 266: struct mbuf *);
1.76 jonathan 267: int sbappendaddrchain(struct sockbuf *, const struct sockaddr *,
268: struct mbuf *, int);
1.64 itojun 269: int sbappendcontrol(struct sockbuf *, struct mbuf *, struct mbuf *);
270: void sbappendrecord(struct sockbuf *, struct mbuf *);
271: void sbcheck(struct sockbuf *);
272: void sbcompress(struct sockbuf *, struct mbuf *, struct mbuf *);
1.23 thorpej 273: struct mbuf *
1.93 christos 274: sbcreatecontrol(void *, int, int, int);
1.64 itojun 275: void sbdrop(struct sockbuf *, int);
276: void sbdroprecord(struct sockbuf *);
277: void sbflush(struct sockbuf *);
278: void sbinsertoob(struct sockbuf *, struct mbuf *);
1.70 christos 279: void sbrelease(struct sockbuf *, struct socket *);
280: int sbreserve(struct sockbuf *, u_long, struct socket *);
1.64 itojun 281: int sbwait(struct sockbuf *);
1.68 thorpej 282: int sb_max_set(u_long);
1.42 lukem 283: void soinit(void);
1.126 bouyer 284: void soinit1(void);
1.109 ad 285: void soinit2(void);
1.64 itojun 286: int soabort(struct socket *);
287: int soaccept(struct socket *, struct mbuf *);
1.121 dyoung 288: int sofamily(const struct socket *);
1.83 christos 289: int sobind(struct socket *, struct mbuf *, struct lwp *);
1.64 itojun 290: void socantrcvmore(struct socket *);
291: void socantsendmore(struct socket *);
292: int soclose(struct socket *);
1.83 christos 293: int soconnect(struct socket *, struct mbuf *, struct lwp *);
1.64 itojun 294: int soconnect2(struct socket *, struct socket *);
1.105 ad 295: int socreate(int, struct socket **, int, int, struct lwp *,
296: struct socket *);
1.99 dyoung 297: int fsocreate(int, struct socket **, int, int, struct lwp *, int *);
1.64 itojun 298: int sodisconnect(struct socket *);
299: void sofree(struct socket *);
1.113 plunky 300: int sogetopt(struct socket *, struct sockopt *);
1.64 itojun 301: void sohasoutofband(struct socket *);
302: void soisconnected(struct socket *);
303: void soisconnecting(struct socket *);
304: void soisdisconnected(struct socket *);
305: void soisdisconnecting(struct socket *);
1.101 elad 306: int solisten(struct socket *, int, struct lwp *);
1.7 mycroft 307: struct socket *
1.89 plunky 308: sonewconn(struct socket *, int);
1.64 itojun 309: void soqinsque(struct socket *, struct socket *, int);
310: int soqremque(struct socket *, int);
311: int soreceive(struct socket *, struct mbuf **, struct uio *,
312: struct mbuf **, struct mbuf **, int *);
313: int soreserve(struct socket *, u_long, u_long);
314: void sorflush(struct socket *);
315: int sosend(struct socket *, struct mbuf *, struct uio *,
1.83 christos 316: struct mbuf *, struct mbuf *, int, struct lwp *);
1.113 plunky 317: int sosetopt(struct socket *, struct sockopt *);
318: int so_setsockopt(struct lwp *, struct socket *, int, int, const void *, size_t);
1.64 itojun 319: int soshutdown(struct socket *, int);
1.123 dsl 320: void sorestart(struct socket *);
1.67 christos 321: void sowakeup(struct socket *, struct sockbuf *, int);
1.49 matt 322: int sockargs(struct mbuf **, const void *, size_t, int);
1.103 ad 323: int sopoll(struct socket *, int);
1.105 ad 324: struct socket *soget(bool);
325: void soput(struct socket *);
326: bool solocked(struct socket *);
327: bool solocked2(struct socket *, struct socket *);
328: int sblock(struct sockbuf *, int);
329: void sbunlock(struct sockbuf *);
1.118 yamt 330: int sowait(struct socket *, bool, int);
1.105 ad 331: void solockretry(struct socket *, kmutex_t *);
332: void sosetlock(struct socket *);
1.110 ad 333: void solockreset(struct socket *, kmutex_t *);
1.42 lukem 334:
1.113 plunky 335: void sockopt_init(struct sockopt *, int, int, size_t);
336: void sockopt_destroy(struct sockopt *);
337: int sockopt_set(struct sockopt *, const void *, size_t);
338: int sockopt_setint(struct sockopt *, int);
339: int sockopt_get(const struct sockopt *, void *, size_t);
340: int sockopt_getint(const struct sockopt *, int *);
341: int sockopt_setmbuf(struct sockopt *, struct mbuf *);
342: struct mbuf *sockopt_getmbuf(const struct sockopt *);
343:
1.96 dsl 344: int copyout_sockname(struct sockaddr *, unsigned int *, int, struct mbuf *);
345: int copyout_msg_control(struct lwp *, struct msghdr *, struct mbuf *);
346: void free_control_mbuf(struct lwp *, struct mbuf *, struct mbuf *);
347:
348: int do_sys_getsockname(struct lwp *, int, int, struct mbuf **);
1.95 dsl 349: int do_sys_sendmsg(struct lwp *, int, struct msghdr *, int, register_t *);
1.96 dsl 350: int do_sys_recvmsg(struct lwp *, int, struct msghdr *, struct mbuf **,
351: struct mbuf **, register_t *);
1.52 thorpej 352:
1.96 dsl 353: int do_sys_bind(struct lwp *, int, struct mbuf *);
354: int do_sys_connect(struct lwp *, int, struct mbuf *);
1.125 christos 355: int do_sys_accept(struct lwp *, int, struct mbuf **, register_t *,
356: const sigset_t *, int, int);
1.95 dsl 357:
1.105 ad 358: /*
359: * Inline functions for sockets and socket buffering.
360: */
361:
362: #include <sys/protosw.h>
363: #include <sys/mbuf.h>
364:
365: /*
366: * Do we need to notify the other side when I/O is possible?
367: */
368: static inline int
369: sb_notify(struct sockbuf *sb)
370: {
371:
372: KASSERT(solocked(sb->sb_so));
373:
374: return sb->sb_flags & (SB_NOTIFY | SB_ASYNC | SB_UPCALL | SB_KNOTE);
375: }
376:
377: /*
378: * How much space is there in a socket buffer (so->so_snd or so->so_rcv)?
379: * This is problematical if the fields are unsigned, as the space might
380: * still be negative (cc > hiwat or mbcnt > mbmax). Should detect
381: * overflow and return 0.
382: */
1.107 ad 383: static inline long
1.105 ad 384: sbspace(struct sockbuf *sb)
385: {
386:
387: KASSERT(solocked(sb->sb_so));
388:
389: return lmin(sb->sb_hiwat - sb->sb_cc, sb->sb_mbmax - sb->sb_mbcnt);
390: }
391:
392: /* do we have to send all at once on a socket? */
393: static inline int
394: sosendallatonce(struct socket *so)
395: {
396:
397: return so->so_proto->pr_flags & PR_ATOMIC;
398: }
399:
400: /* can we read something from so? */
401: static inline int
402: soreadable(struct socket *so)
403: {
404:
405: KASSERT(solocked(so));
406:
407: return so->so_rcv.sb_cc >= so->so_rcv.sb_lowat ||
408: (so->so_state & SS_CANTRCVMORE) != 0 ||
409: so->so_qlen != 0 || so->so_error != 0;
410: }
411:
412: /* can we write something to so? */
413: static inline int
414: sowritable(struct socket *so)
415: {
416:
417: KASSERT(solocked(so));
418:
419: return (sbspace(&so->so_snd) >= so->so_snd.sb_lowat &&
420: ((so->so_state & SS_ISCONNECTED) != 0 ||
421: (so->so_proto->pr_flags & PR_CONNREQUIRED) == 0)) ||
422: (so->so_state & SS_CANTSENDMORE) != 0 ||
423: so->so_error != 0;
424: }
425:
426: /* adjust counters in sb reflecting allocation of m */
427: static inline void
428: sballoc(struct sockbuf *sb, struct mbuf *m)
429: {
430:
431: KASSERT(solocked(sb->sb_so));
432:
433: sb->sb_cc += m->m_len;
434: sb->sb_mbcnt += MSIZE;
435: if (m->m_flags & M_EXT)
436: sb->sb_mbcnt += m->m_ext.ext_size;
437: }
438:
439: /* adjust counters in sb reflecting freeing of m */
440: static inline void
441: sbfree(struct sockbuf *sb, struct mbuf *m)
442: {
443:
444: KASSERT(solocked(sb->sb_so));
445:
446: sb->sb_cc -= m->m_len;
447: sb->sb_mbcnt -= MSIZE;
448: if (m->m_flags & M_EXT)
449: sb->sb_mbcnt -= m->m_ext.ext_size;
450: }
451:
452: static inline void
453: sorwakeup(struct socket *so)
454: {
455:
456: KASSERT(solocked(so));
457:
458: if (sb_notify(&so->so_rcv))
459: sowakeup(so, &so->so_rcv, POLL_IN);
460: }
461:
462: static inline void
463: sowwakeup(struct socket *so)
464: {
465:
466: KASSERT(solocked(so));
467:
468: if (sb_notify(&so->so_snd))
469: sowakeup(so, &so->so_snd, POLL_OUT);
470: }
471:
472: static inline void
473: solock(struct socket *so)
474: {
475: kmutex_t *lock;
476:
477: lock = so->so_lock;
478: mutex_enter(lock);
479: if (__predict_false(lock != so->so_lock))
480: solockretry(so, lock);
481: }
482:
483: static inline void
484: sounlock(struct socket *so)
485: {
486:
487: mutex_exit(so->so_lock);
488: }
1.95 dsl 489:
1.52 thorpej 490: #ifdef SOCKBUF_DEBUG
1.78 yamt 491: /*
492: * SBLASTRECORDCHK: check sb->sb_lastrecord is maintained correctly.
493: * SBLASTMBUFCHK: check sb->sb_mbtail is maintained correctly.
494: *
495: * => panic if the socket buffer is inconsistent.
496: * => 'where' is used for a panic message.
497: */
1.52 thorpej 498: void sblastrecordchk(struct sockbuf *, const char *);
499: #define SBLASTRECORDCHK(sb, where) sblastrecordchk((sb), (where))
500:
501: void sblastmbufchk(struct sockbuf *, const char *);
502: #define SBLASTMBUFCHK(sb, where) sblastmbufchk((sb), (where))
1.105 ad 503: #define SBCHECK(sb) sbcheck(sb)
1.52 thorpej 504: #else
505: #define SBLASTRECORDCHK(sb, where) /* nothing */
506: #define SBLASTMBUFCHK(sb, where) /* nothing */
1.105 ad 507: #define SBCHECK(sb) /* nothing */
1.52 thorpej 508: #endif /* SOCKBUF_DEBUG */
1.60 yamt 509:
510: /* sosend loan */
1.126.6.1! mrg 511: vaddr_t sokvaalloc(vaddr_t, vsize_t, struct socket *);
1.60 yamt 512: void sokvafree(vaddr_t, vsize_t);
1.93 christos 513: void soloanfree(struct mbuf *, void *, size_t, void *);
1.17 christos 514:
1.76 jonathan 515: /*
516: * Values for socket-buffer-append priority argument to sbappendaddrchain().
517: * The following flags are reserved for future implementation:
518: *
519: * SB_PRIO_NONE: honour normal socket-buffer limits.
520: *
521: * SB_PRIO_ONESHOT_OVERFLOW: if the socket has any space,
522: * deliver the entire chain. Intended for large requests
523: * that should be delivered in their entirety, or not at all.
524: *
525: * SB_PRIO_OVERDRAFT: allow a small (2*MLEN) overflow, over and
526: * aboce normal socket limits. Intended messages indicating
527: * buffer overflow in earlier normal/lower-priority messages .
528: *
529: * SB_PRIO_BESTEFFORT: Ignore limits entirely. Intended only for
530: * kernel-generated messages to specially-marked scokets which
531: * require "reliable" delivery, nd where the source socket/protocol
532: * message generator enforce some hard limit (but possibly well
533: * above kern.sbmax). It is entirely up to the in-kernel source to
534: * avoid complete mbuf exhaustion or DoS scenarios.
535: */
536: #define SB_PRIO_NONE 0
537: #define SB_PRIO_ONESHOT_OVERFLOW 1
538: #define SB_PRIO_OVERDRAFT 2
539: #define SB_PRIO_BESTEFFORT 3
540:
1.112 tls 541: /*
542: * Accept filter functions (duh).
543: */
1.116 ad 544: int accept_filt_getopt(struct socket *, struct sockopt *);
545: int accept_filt_setopt(struct socket *, const struct sockopt *);
546: int accept_filt_clear(struct socket *);
1.112 tls 547: int accept_filt_add(struct accept_filter *);
1.116 ad 548: int accept_filt_del(struct accept_filter *);
1.112 tls 549: struct accept_filter *accept_filt_get(char *);
550: #ifdef ACCEPT_FILTER_MOD
551: #ifdef SYSCTL_DECL
552: SYSCTL_DECL(_net_inet_accf);
553: #endif
554: void accept_filter_init(void);
555: #endif
556:
1.14 jtc 557: #endif /* _KERNEL */
1.24 mikel 558:
559: #endif /* !_SYS_SOCKETVAR_H_ */
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