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1.40 ! thorpej 1: /* $NetBSD: uipc_socket.c,v 1.39 1998/09/25 23:32:27 matt Exp $ */
1.16 cgd 2:
1.1 cgd 3: /*
1.15 mycroft 4: * Copyright (c) 1982, 1986, 1988, 1990, 1993
5: * The Regents of the University of California. All rights reserved.
1.1 cgd 6: *
7: * Redistribution and use in source and binary forms, with or without
8: * modification, are permitted provided that the following conditions
9: * are met:
10: * 1. Redistributions of source code must retain the above copyright
11: * notice, this list of conditions and the following disclaimer.
12: * 2. Redistributions in binary form must reproduce the above copyright
13: * notice, this list of conditions and the following disclaimer in the
14: * documentation and/or other materials provided with the distribution.
15: * 3. All advertising materials mentioning features or use of this software
16: * must display the following acknowledgement:
17: * This product includes software developed by the University of
18: * California, Berkeley and its contributors.
19: * 4. Neither the name of the University nor the names of its contributors
20: * may be used to endorse or promote products derived from this software
21: * without specific prior written permission.
22: *
23: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33: * SUCH DAMAGE.
34: *
1.32 fvdl 35: * @(#)uipc_socket.c 8.6 (Berkeley) 5/2/95
1.1 cgd 36: */
1.35 thorpej 37:
38: #include "opt_compat_sunos.h"
1.1 cgd 39:
1.9 mycroft 40: #include <sys/param.h>
41: #include <sys/systm.h>
42: #include <sys/proc.h>
43: #include <sys/file.h>
44: #include <sys/malloc.h>
45: #include <sys/mbuf.h>
46: #include <sys/domain.h>
47: #include <sys/kernel.h>
48: #include <sys/protosw.h>
49: #include <sys/socket.h>
50: #include <sys/socketvar.h>
1.21 christos 51: #include <sys/signalvar.h>
1.9 mycroft 52: #include <sys/resourcevar.h>
1.37 thorpej 53: #include <sys/pool.h>
54:
55: struct pool socket_pool;
56:
57: void
58: soinit()
59: {
60:
61: pool_init(&socket_pool, sizeof(struct socket), 0, 0, 0,
62: "sockpl", 0, NULL, NULL, M_SOCKET);
63: }
1.1 cgd 64:
65: /*
66: * Socket operation routines.
67: * These routines are called by the routines in
68: * sys_socket.c or from a system process, and
69: * implement the semantics of socket operations by
70: * switching out to the protocol specific routines.
71: */
72: /*ARGSUSED*/
1.3 andrew 73: int
1.1 cgd 74: socreate(dom, aso, type, proto)
1.11 mycroft 75: int dom;
1.1 cgd 76: struct socket **aso;
77: register int type;
78: int proto;
79: {
80: struct proc *p = curproc; /* XXX */
81: register struct protosw *prp;
82: register struct socket *so;
83: register int error;
1.39 matt 84: int s;
1.1 cgd 85:
86: if (proto)
87: prp = pffindproto(dom, proto, type);
88: else
89: prp = pffindtype(dom, type);
1.15 mycroft 90: if (prp == 0 || prp->pr_usrreq == 0)
1.1 cgd 91: return (EPROTONOSUPPORT);
92: if (prp->pr_type != type)
93: return (EPROTOTYPE);
1.39 matt 94: s = splsoftnet();
1.37 thorpej 95: so = pool_get(&socket_pool, PR_WAITOK);
1.38 perry 96: memset((caddr_t)so, 0, sizeof(*so));
1.31 thorpej 97: TAILQ_INIT(&so->so_q0);
98: TAILQ_INIT(&so->so_q);
1.1 cgd 99: so->so_type = type;
100: so->so_proto = prp;
1.33 matt 101: so->so_send = sosend;
102: so->so_receive = soreceive;
1.22 mycroft 103: error = (*prp->pr_usrreq)(so, PRU_ATTACH, (struct mbuf *)0,
104: (struct mbuf *)(long)proto, (struct mbuf *)0, p);
1.1 cgd 105: if (error) {
106: so->so_state |= SS_NOFDREF;
107: sofree(so);
1.39 matt 108: splx(s);
1.1 cgd 109: return (error);
110: }
1.10 deraadt 111: #ifdef COMPAT_SUNOS
1.18 christos 112: {
113: extern struct emul emul_sunos;
114: if (p->p_emul == &emul_sunos && type == SOCK_DGRAM)
115: so->so_options |= SO_BROADCAST;
116: }
1.10 deraadt 117: #endif
1.39 matt 118: splx(s);
1.1 cgd 119: *aso = so;
120: return (0);
121: }
122:
1.3 andrew 123: int
1.1 cgd 124: sobind(so, nam)
125: struct socket *so;
126: struct mbuf *nam;
127: {
1.22 mycroft 128: struct proc *p = curproc; /* XXX */
1.20 mycroft 129: int s = splsoftnet();
1.1 cgd 130: int error;
131:
1.22 mycroft 132: error = (*so->so_proto->pr_usrreq)(so, PRU_BIND, (struct mbuf *)0,
133: nam, (struct mbuf *)0, p);
1.1 cgd 134: splx(s);
135: return (error);
136: }
137:
1.3 andrew 138: int
1.1 cgd 139: solisten(so, backlog)
140: register struct socket *so;
141: int backlog;
142: {
1.20 mycroft 143: int s = splsoftnet(), error;
1.1 cgd 144:
1.22 mycroft 145: error = (*so->so_proto->pr_usrreq)(so, PRU_LISTEN, (struct mbuf *)0,
146: (struct mbuf *)0, (struct mbuf *)0, (struct proc *)0);
1.1 cgd 147: if (error) {
148: splx(s);
149: return (error);
150: }
1.31 thorpej 151: if (so->so_q.tqh_first == NULL)
1.1 cgd 152: so->so_options |= SO_ACCEPTCONN;
153: if (backlog < 0)
154: backlog = 0;
155: so->so_qlimit = min(backlog, SOMAXCONN);
156: splx(s);
157: return (0);
158: }
159:
1.21 christos 160: void
1.1 cgd 161: sofree(so)
162: register struct socket *so;
163: {
164:
165: if (so->so_pcb || (so->so_state & SS_NOFDREF) == 0)
166: return;
167: if (so->so_head) {
168: if (!soqremque(so, 0) && !soqremque(so, 1))
169: panic("sofree dq");
170: so->so_head = 0;
171: }
172: sbrelease(&so->so_snd);
173: sorflush(so);
1.37 thorpej 174: pool_put(&socket_pool, so);
1.1 cgd 175: }
176:
177: /*
178: * Close a socket on last file table reference removal.
179: * Initiate disconnect if connected.
180: * Free socket when disconnect complete.
181: */
1.3 andrew 182: int
1.1 cgd 183: soclose(so)
184: register struct socket *so;
185: {
1.20 mycroft 186: int s = splsoftnet(); /* conservative */
1.1 cgd 187: int error = 0;
188:
189: if (so->so_options & SO_ACCEPTCONN) {
1.31 thorpej 190: while (so->so_q0.tqh_first)
191: (void) soabort(so->so_q0.tqh_first);
192: while (so->so_q.tqh_first)
193: (void) soabort(so->so_q.tqh_first);
1.1 cgd 194: }
195: if (so->so_pcb == 0)
196: goto discard;
197: if (so->so_state & SS_ISCONNECTED) {
198: if ((so->so_state & SS_ISDISCONNECTING) == 0) {
199: error = sodisconnect(so);
200: if (error)
201: goto drop;
202: }
203: if (so->so_options & SO_LINGER) {
204: if ((so->so_state & SS_ISDISCONNECTING) &&
205: (so->so_state & SS_NBIO))
206: goto drop;
1.21 christos 207: while (so->so_state & SS_ISCONNECTED) {
208: error = tsleep((caddr_t)&so->so_timeo,
209: PSOCK | PCATCH, netcls,
1.30 thorpej 210: so->so_linger * hz);
1.21 christos 211: if (error)
1.1 cgd 212: break;
1.21 christos 213: }
1.1 cgd 214: }
215: }
216: drop:
217: if (so->so_pcb) {
1.22 mycroft 218: int error2 = (*so->so_proto->pr_usrreq)(so, PRU_DETACH,
219: (struct mbuf *)0, (struct mbuf *)0, (struct mbuf *)0,
220: (struct proc *)0);
1.1 cgd 221: if (error == 0)
222: error = error2;
223: }
224: discard:
225: if (so->so_state & SS_NOFDREF)
226: panic("soclose: NOFDREF");
227: so->so_state |= SS_NOFDREF;
228: sofree(so);
229: splx(s);
230: return (error);
231: }
232:
233: /*
1.20 mycroft 234: * Must be called at splsoftnet...
1.1 cgd 235: */
1.3 andrew 236: int
1.1 cgd 237: soabort(so)
238: struct socket *so;
239: {
240:
1.22 mycroft 241: return (*so->so_proto->pr_usrreq)(so, PRU_ABORT, (struct mbuf *)0,
242: (struct mbuf *)0, (struct mbuf *)0, (struct proc *)0);
1.1 cgd 243: }
244:
1.3 andrew 245: int
1.1 cgd 246: soaccept(so, nam)
247: register struct socket *so;
248: struct mbuf *nam;
249: {
1.20 mycroft 250: int s = splsoftnet();
1.1 cgd 251: int error;
252:
253: if ((so->so_state & SS_NOFDREF) == 0)
254: panic("soaccept: !NOFDREF");
255: so->so_state &= ~SS_NOFDREF;
1.22 mycroft 256: error = (*so->so_proto->pr_usrreq)(so, PRU_ACCEPT, (struct mbuf *)0,
257: nam, (struct mbuf *)0, (struct proc *)0);
1.1 cgd 258: splx(s);
259: return (error);
260: }
261:
1.3 andrew 262: int
1.1 cgd 263: soconnect(so, nam)
264: register struct socket *so;
265: struct mbuf *nam;
266: {
1.23 mycroft 267: struct proc *p = curproc; /* XXX */
1.1 cgd 268: int s;
269: int error;
270:
271: if (so->so_options & SO_ACCEPTCONN)
272: return (EOPNOTSUPP);
1.20 mycroft 273: s = splsoftnet();
1.1 cgd 274: /*
275: * If protocol is connection-based, can only connect once.
276: * Otherwise, if connected, try to disconnect first.
277: * This allows user to disconnect by connecting to, e.g.,
278: * a null address.
279: */
280: if (so->so_state & (SS_ISCONNECTED|SS_ISCONNECTING) &&
281: ((so->so_proto->pr_flags & PR_CONNREQUIRED) ||
282: (error = sodisconnect(so))))
283: error = EISCONN;
284: else
285: error = (*so->so_proto->pr_usrreq)(so, PRU_CONNECT,
1.23 mycroft 286: (struct mbuf *)0, nam, (struct mbuf *)0, p);
1.1 cgd 287: splx(s);
288: return (error);
289: }
290:
1.3 andrew 291: int
1.1 cgd 292: soconnect2(so1, so2)
293: register struct socket *so1;
294: struct socket *so2;
295: {
1.20 mycroft 296: int s = splsoftnet();
1.1 cgd 297: int error;
298:
1.22 mycroft 299: error = (*so1->so_proto->pr_usrreq)(so1, PRU_CONNECT2,
300: (struct mbuf *)0, (struct mbuf *)so2, (struct mbuf *)0,
301: (struct proc *)0);
1.1 cgd 302: splx(s);
303: return (error);
304: }
305:
1.3 andrew 306: int
1.1 cgd 307: sodisconnect(so)
308: register struct socket *so;
309: {
1.20 mycroft 310: int s = splsoftnet();
1.1 cgd 311: int error;
312:
313: if ((so->so_state & SS_ISCONNECTED) == 0) {
314: error = ENOTCONN;
315: goto bad;
316: }
317: if (so->so_state & SS_ISDISCONNECTING) {
318: error = EALREADY;
319: goto bad;
320: }
1.22 mycroft 321: error = (*so->so_proto->pr_usrreq)(so, PRU_DISCONNECT,
322: (struct mbuf *)0, (struct mbuf *)0, (struct mbuf *)0,
323: (struct proc *)0);
1.1 cgd 324: bad:
325: splx(s);
326: return (error);
327: }
328:
1.15 mycroft 329: #define SBLOCKWAIT(f) (((f) & MSG_DONTWAIT) ? M_NOWAIT : M_WAITOK)
1.1 cgd 330: /*
331: * Send on a socket.
332: * If send must go all at once and message is larger than
333: * send buffering, then hard error.
334: * Lock against other senders.
335: * If must go all at once and not enough room now, then
336: * inform user that this would block and do nothing.
337: * Otherwise, if nonblocking, send as much as possible.
338: * The data to be sent is described by "uio" if nonzero,
339: * otherwise by the mbuf chain "top" (which must be null
340: * if uio is not). Data provided in mbuf chain must be small
341: * enough to send all at once.
342: *
343: * Returns nonzero on error, timeout or signal; callers
344: * must check for short counts if EINTR/ERESTART are returned.
345: * Data and control buffers are freed on return.
346: */
1.3 andrew 347: int
1.1 cgd 348: sosend(so, addr, uio, top, control, flags)
349: register struct socket *so;
350: struct mbuf *addr;
351: struct uio *uio;
352: struct mbuf *top;
353: struct mbuf *control;
354: int flags;
355: {
1.15 mycroft 356: struct proc *p = curproc; /* XXX */
1.1 cgd 357: struct mbuf **mp;
358: register struct mbuf *m;
359: register long space, len, resid;
360: int clen = 0, error, s, dontroute, mlen;
361: int atomic = sosendallatonce(so) || top;
362:
363: if (uio)
364: resid = uio->uio_resid;
365: else
366: resid = top->m_pkthdr.len;
1.7 cgd 367: /*
368: * In theory resid should be unsigned.
369: * However, space must be signed, as it might be less than 0
370: * if we over-committed, and we must use a signed comparison
371: * of space and resid. On the other hand, a negative resid
372: * causes us to loop sending 0-length segments to the protocol.
373: */
1.29 mycroft 374: if (resid < 0) {
375: error = EINVAL;
376: goto out;
377: }
1.1 cgd 378: dontroute =
379: (flags & MSG_DONTROUTE) && (so->so_options & SO_DONTROUTE) == 0 &&
380: (so->so_proto->pr_flags & PR_ATOMIC);
1.12 mycroft 381: p->p_stats->p_ru.ru_msgsnd++;
1.1 cgd 382: if (control)
383: clen = control->m_len;
384: #define snderr(errno) { error = errno; splx(s); goto release; }
385:
386: restart:
1.21 christos 387: if ((error = sblock(&so->so_snd, SBLOCKWAIT(flags))) != 0)
1.1 cgd 388: goto out;
389: do {
1.20 mycroft 390: s = splsoftnet();
1.1 cgd 391: if (so->so_state & SS_CANTSENDMORE)
392: snderr(EPIPE);
393: if (so->so_error)
394: snderr(so->so_error);
395: if ((so->so_state & SS_ISCONNECTED) == 0) {
396: if (so->so_proto->pr_flags & PR_CONNREQUIRED) {
397: if ((so->so_state & SS_ISCONFIRMING) == 0 &&
398: !(resid == 0 && clen != 0))
399: snderr(ENOTCONN);
400: } else if (addr == 0)
401: snderr(EDESTADDRREQ);
402: }
403: space = sbspace(&so->so_snd);
404: if (flags & MSG_OOB)
405: space += 1024;
1.21 christos 406: if ((atomic && resid > so->so_snd.sb_hiwat) ||
1.11 mycroft 407: clen > so->so_snd.sb_hiwat)
408: snderr(EMSGSIZE);
409: if (space < resid + clen && uio &&
1.1 cgd 410: (atomic || space < so->so_snd.sb_lowat || space < clen)) {
411: if (so->so_state & SS_NBIO)
412: snderr(EWOULDBLOCK);
413: sbunlock(&so->so_snd);
414: error = sbwait(&so->so_snd);
415: splx(s);
416: if (error)
417: goto out;
418: goto restart;
419: }
420: splx(s);
421: mp = ⊤
422: space -= clen;
423: do {
424: if (uio == NULL) {
425: /*
426: * Data is prepackaged in "top".
427: */
428: resid = 0;
429: if (flags & MSG_EOR)
430: top->m_flags |= M_EOR;
431: } else do {
432: if (top == 0) {
433: MGETHDR(m, M_WAIT, MT_DATA);
434: mlen = MHLEN;
435: m->m_pkthdr.len = 0;
436: m->m_pkthdr.rcvif = (struct ifnet *)0;
437: } else {
438: MGET(m, M_WAIT, MT_DATA);
439: mlen = MLEN;
440: }
1.15 mycroft 441: if (resid >= MINCLSIZE && space >= MCLBYTES) {
1.1 cgd 442: MCLGET(m, M_WAIT);
443: if ((m->m_flags & M_EXT) == 0)
444: goto nopages;
445: mlen = MCLBYTES;
1.15 mycroft 446: #ifdef MAPPED_MBUFS
447: len = min(MCLBYTES, resid);
448: #else
449: if (atomic && top == 0) {
450: len = min(MCLBYTES - max_hdr, resid);
451: m->m_data += max_hdr;
452: } else
453: len = min(MCLBYTES, resid);
454: #endif
1.25 explorer 455: space -= len;
1.1 cgd 456: } else {
457: nopages:
458: len = min(min(mlen, resid), space);
1.15 mycroft 459: space -= len;
1.1 cgd 460: /*
461: * For datagram protocols, leave room
462: * for protocol headers in first mbuf.
463: */
464: if (atomic && top == 0 && len < mlen)
465: MH_ALIGN(m, len);
466: }
467: error = uiomove(mtod(m, caddr_t), (int)len, uio);
468: resid = uio->uio_resid;
469: m->m_len = len;
470: *mp = m;
471: top->m_pkthdr.len += len;
472: if (error)
473: goto release;
474: mp = &m->m_next;
475: if (resid <= 0) {
476: if (flags & MSG_EOR)
477: top->m_flags |= M_EOR;
478: break;
479: }
480: } while (space > 0 && atomic);
481: if (dontroute)
482: so->so_options |= SO_DONTROUTE;
1.40 ! thorpej 483: if (resid > 0)
! 484: so->so_state |= SS_MORETOCOME;
1.20 mycroft 485: s = splsoftnet(); /* XXX */
1.22 mycroft 486: error = (*so->so_proto->pr_usrreq)(so,
1.24 mycroft 487: (flags & MSG_OOB) ? PRU_SENDOOB : PRU_SEND,
488: top, addr, control, p);
1.1 cgd 489: splx(s);
490: if (dontroute)
491: so->so_options &= ~SO_DONTROUTE;
1.40 ! thorpej 492: if (resid > 0)
! 493: so->so_state &= ~SS_MORETOCOME;
1.1 cgd 494: clen = 0;
495: control = 0;
496: top = 0;
497: mp = ⊤
498: if (error)
499: goto release;
500: } while (resid && space > 0);
501: } while (resid);
502:
503: release:
504: sbunlock(&so->so_snd);
505: out:
506: if (top)
507: m_freem(top);
508: if (control)
509: m_freem(control);
510: return (error);
511: }
512:
513: /*
514: * Implement receive operations on a socket.
515: * We depend on the way that records are added to the sockbuf
516: * by sbappend*. In particular, each record (mbufs linked through m_next)
517: * must begin with an address if the protocol so specifies,
518: * followed by an optional mbuf or mbufs containing ancillary data,
519: * and then zero or more mbufs of data.
520: * In order to avoid blocking network interrupts for the entire time here,
521: * we splx() while doing the actual copy to user space.
522: * Although the sockbuf is locked, new data may still be appended,
523: * and thus we must maintain consistency of the sockbuf during that time.
524: *
525: * The caller may receive the data as a single mbuf chain by supplying
526: * an mbuf **mp0 for use in returning the chain. The uio is then used
527: * only for the count in uio_resid.
528: */
1.3 andrew 529: int
1.1 cgd 530: soreceive(so, paddr, uio, mp0, controlp, flagsp)
531: register struct socket *so;
532: struct mbuf **paddr;
533: struct uio *uio;
534: struct mbuf **mp0;
535: struct mbuf **controlp;
536: int *flagsp;
537: {
538: register struct mbuf *m, **mp;
539: register int flags, len, error, s, offset;
540: struct protosw *pr = so->so_proto;
541: struct mbuf *nextrecord;
1.21 christos 542: int moff, type = 0;
1.3 andrew 543: int orig_resid = uio->uio_resid;
1.1 cgd 544:
545: mp = mp0;
546: if (paddr)
547: *paddr = 0;
548: if (controlp)
549: *controlp = 0;
550: if (flagsp)
551: flags = *flagsp &~ MSG_EOR;
552: else
553: flags = 0;
554: if (flags & MSG_OOB) {
555: m = m_get(M_WAIT, MT_DATA);
1.17 cgd 556: error = (*pr->pr_usrreq)(so, PRU_RCVOOB, m,
1.22 mycroft 557: (struct mbuf *)(long)(flags & MSG_PEEK), (struct mbuf *)0,
558: (struct proc *)0);
1.1 cgd 559: if (error)
560: goto bad;
561: do {
562: error = uiomove(mtod(m, caddr_t),
563: (int) min(uio->uio_resid, m->m_len), uio);
564: m = m_free(m);
565: } while (uio->uio_resid && error == 0 && m);
566: bad:
567: if (m)
568: m_freem(m);
569: return (error);
570: }
571: if (mp)
572: *mp = (struct mbuf *)0;
573: if (so->so_state & SS_ISCONFIRMING && uio->uio_resid)
1.22 mycroft 574: (*pr->pr_usrreq)(so, PRU_RCVD, (struct mbuf *)0,
575: (struct mbuf *)0, (struct mbuf *)0, (struct proc *)0);
1.1 cgd 576:
577: restart:
1.21 christos 578: if ((error = sblock(&so->so_rcv, SBLOCKWAIT(flags))) != 0)
1.1 cgd 579: return (error);
1.20 mycroft 580: s = splsoftnet();
1.1 cgd 581:
582: m = so->so_rcv.sb_mb;
583: /*
584: * If we have less data than requested, block awaiting more
585: * (subject to any timeout) if:
1.15 mycroft 586: * 1. the current count is less than the low water mark,
1.1 cgd 587: * 2. MSG_WAITALL is set, and it is possible to do the entire
1.15 mycroft 588: * receive operation at once if we block (resid <= hiwat), or
589: * 3. MSG_DONTWAIT is not set.
1.1 cgd 590: * If MSG_WAITALL is set but resid is larger than the receive buffer,
591: * we have to do the receive in sections, and thus risk returning
592: * a short count if a timeout or signal occurs after we start.
593: */
1.21 christos 594: if (m == 0 || (((flags & MSG_DONTWAIT) == 0 &&
1.15 mycroft 595: so->so_rcv.sb_cc < uio->uio_resid) &&
1.1 cgd 596: (so->so_rcv.sb_cc < so->so_rcv.sb_lowat ||
597: ((flags & MSG_WAITALL) && uio->uio_resid <= so->so_rcv.sb_hiwat)) &&
1.21 christos 598: m->m_nextpkt == 0 && (pr->pr_flags & PR_ATOMIC) == 0)) {
1.1 cgd 599: #ifdef DIAGNOSTIC
600: if (m == 0 && so->so_rcv.sb_cc)
601: panic("receive 1");
602: #endif
603: if (so->so_error) {
604: if (m)
1.15 mycroft 605: goto dontblock;
1.1 cgd 606: error = so->so_error;
607: if ((flags & MSG_PEEK) == 0)
608: so->so_error = 0;
609: goto release;
610: }
611: if (so->so_state & SS_CANTRCVMORE) {
612: if (m)
1.15 mycroft 613: goto dontblock;
1.1 cgd 614: else
615: goto release;
616: }
617: for (; m; m = m->m_next)
618: if (m->m_type == MT_OOBDATA || (m->m_flags & M_EOR)) {
619: m = so->so_rcv.sb_mb;
620: goto dontblock;
621: }
622: if ((so->so_state & (SS_ISCONNECTED|SS_ISCONNECTING)) == 0 &&
623: (so->so_proto->pr_flags & PR_CONNREQUIRED)) {
624: error = ENOTCONN;
625: goto release;
626: }
627: if (uio->uio_resid == 0)
628: goto release;
1.15 mycroft 629: if ((so->so_state & SS_NBIO) || (flags & MSG_DONTWAIT)) {
1.1 cgd 630: error = EWOULDBLOCK;
631: goto release;
632: }
633: sbunlock(&so->so_rcv);
634: error = sbwait(&so->so_rcv);
635: splx(s);
636: if (error)
637: return (error);
638: goto restart;
639: }
640: dontblock:
1.15 mycroft 641: #ifdef notyet /* XXXX */
642: if (uio->uio_procp)
643: uio->uio_procp->p_stats->p_ru.ru_msgrcv++;
644: #endif
1.1 cgd 645: nextrecord = m->m_nextpkt;
646: if (pr->pr_flags & PR_ADDR) {
647: #ifdef DIAGNOSTIC
648: if (m->m_type != MT_SONAME)
649: panic("receive 1a");
650: #endif
1.3 andrew 651: orig_resid = 0;
1.1 cgd 652: if (flags & MSG_PEEK) {
653: if (paddr)
654: *paddr = m_copy(m, 0, m->m_len);
655: m = m->m_next;
656: } else {
657: sbfree(&so->so_rcv, m);
658: if (paddr) {
659: *paddr = m;
660: so->so_rcv.sb_mb = m->m_next;
661: m->m_next = 0;
662: m = so->so_rcv.sb_mb;
663: } else {
664: MFREE(m, so->so_rcv.sb_mb);
665: m = so->so_rcv.sb_mb;
666: }
667: }
668: }
669: while (m && m->m_type == MT_CONTROL && error == 0) {
670: if (flags & MSG_PEEK) {
671: if (controlp)
672: *controlp = m_copy(m, 0, m->m_len);
673: m = m->m_next;
674: } else {
675: sbfree(&so->so_rcv, m);
676: if (controlp) {
677: if (pr->pr_domain->dom_externalize &&
678: mtod(m, struct cmsghdr *)->cmsg_type ==
679: SCM_RIGHTS)
680: error = (*pr->pr_domain->dom_externalize)(m);
681: *controlp = m;
682: so->so_rcv.sb_mb = m->m_next;
683: m->m_next = 0;
684: m = so->so_rcv.sb_mb;
685: } else {
686: MFREE(m, so->so_rcv.sb_mb);
687: m = so->so_rcv.sb_mb;
688: }
689: }
1.3 andrew 690: if (controlp) {
691: orig_resid = 0;
1.1 cgd 692: controlp = &(*controlp)->m_next;
1.3 andrew 693: }
1.1 cgd 694: }
695: if (m) {
696: if ((flags & MSG_PEEK) == 0)
697: m->m_nextpkt = nextrecord;
698: type = m->m_type;
699: if (type == MT_OOBDATA)
700: flags |= MSG_OOB;
701: }
702: moff = 0;
703: offset = 0;
704: while (m && uio->uio_resid > 0 && error == 0) {
705: if (m->m_type == MT_OOBDATA) {
706: if (type != MT_OOBDATA)
707: break;
708: } else if (type == MT_OOBDATA)
709: break;
710: #ifdef DIAGNOSTIC
711: else if (m->m_type != MT_DATA && m->m_type != MT_HEADER)
712: panic("receive 3");
713: #endif
714: so->so_state &= ~SS_RCVATMARK;
715: len = uio->uio_resid;
716: if (so->so_oobmark && len > so->so_oobmark - offset)
717: len = so->so_oobmark - offset;
718: if (len > m->m_len - moff)
719: len = m->m_len - moff;
720: /*
721: * If mp is set, just pass back the mbufs.
722: * Otherwise copy them out via the uio, then free.
723: * Sockbuf must be consistent here (points to current mbuf,
724: * it points to next record) when we drop priority;
725: * we must note any additions to the sockbuf when we
726: * block interrupts again.
727: */
728: if (mp == 0) {
729: splx(s);
730: error = uiomove(mtod(m, caddr_t) + moff, (int)len, uio);
1.20 mycroft 731: s = splsoftnet();
1.1 cgd 732: } else
733: uio->uio_resid -= len;
734: if (len == m->m_len - moff) {
735: if (m->m_flags & M_EOR)
736: flags |= MSG_EOR;
737: if (flags & MSG_PEEK) {
738: m = m->m_next;
739: moff = 0;
740: } else {
741: nextrecord = m->m_nextpkt;
742: sbfree(&so->so_rcv, m);
743: if (mp) {
744: *mp = m;
745: mp = &m->m_next;
746: so->so_rcv.sb_mb = m = m->m_next;
747: *mp = (struct mbuf *)0;
748: } else {
749: MFREE(m, so->so_rcv.sb_mb);
750: m = so->so_rcv.sb_mb;
751: }
752: if (m)
753: m->m_nextpkt = nextrecord;
754: }
755: } else {
756: if (flags & MSG_PEEK)
757: moff += len;
758: else {
759: if (mp)
760: *mp = m_copym(m, 0, len, M_WAIT);
761: m->m_data += len;
762: m->m_len -= len;
763: so->so_rcv.sb_cc -= len;
764: }
765: }
766: if (so->so_oobmark) {
767: if ((flags & MSG_PEEK) == 0) {
768: so->so_oobmark -= len;
769: if (so->so_oobmark == 0) {
770: so->so_state |= SS_RCVATMARK;
771: break;
772: }
1.7 cgd 773: } else {
1.1 cgd 774: offset += len;
1.7 cgd 775: if (offset == so->so_oobmark)
776: break;
777: }
1.1 cgd 778: }
779: if (flags & MSG_EOR)
780: break;
781: /*
782: * If the MSG_WAITALL flag is set (for non-atomic socket),
783: * we must not quit until "uio->uio_resid == 0" or an error
784: * termination. If a signal/timeout occurs, return
785: * with a short count but without error.
786: * Keep sockbuf locked against other readers.
787: */
788: while (flags & MSG_WAITALL && m == 0 && uio->uio_resid > 0 &&
1.3 andrew 789: !sosendallatonce(so) && !nextrecord) {
1.1 cgd 790: if (so->so_error || so->so_state & SS_CANTRCVMORE)
791: break;
792: error = sbwait(&so->so_rcv);
793: if (error) {
794: sbunlock(&so->so_rcv);
795: splx(s);
796: return (0);
797: }
1.21 christos 798: if ((m = so->so_rcv.sb_mb) != NULL)
1.1 cgd 799: nextrecord = m->m_nextpkt;
800: }
801: }
1.3 andrew 802:
803: if (m && pr->pr_flags & PR_ATOMIC) {
804: flags |= MSG_TRUNC;
805: if ((flags & MSG_PEEK) == 0)
806: (void) sbdroprecord(&so->so_rcv);
807: }
1.1 cgd 808: if ((flags & MSG_PEEK) == 0) {
809: if (m == 0)
810: so->so_rcv.sb_mb = nextrecord;
811: if (pr->pr_flags & PR_WANTRCVD && so->so_pcb)
1.22 mycroft 812: (*pr->pr_usrreq)(so, PRU_RCVD, (struct mbuf *)0,
813: (struct mbuf *)(long)flags, (struct mbuf *)0,
814: (struct proc *)0);
1.1 cgd 815: }
1.3 andrew 816: if (orig_resid == uio->uio_resid && orig_resid &&
817: (flags & MSG_EOR) == 0 && (so->so_state & SS_CANTRCVMORE) == 0) {
818: sbunlock(&so->so_rcv);
819: splx(s);
820: goto restart;
821: }
822:
1.1 cgd 823: if (flagsp)
824: *flagsp |= flags;
825: release:
826: sbunlock(&so->so_rcv);
827: splx(s);
828: return (error);
829: }
830:
1.14 mycroft 831: int
1.1 cgd 832: soshutdown(so, how)
1.34 kleink 833: struct socket *so;
834: int how;
1.1 cgd 835: {
1.34 kleink 836: struct protosw *pr = so->so_proto;
837:
838: if (!(how == SHUT_RD || how == SHUT_WR || how == SHUT_RDWR))
839: return (EINVAL);
1.1 cgd 840:
1.34 kleink 841: if (how == SHUT_RD || how == SHUT_RDWR)
1.1 cgd 842: sorflush(so);
1.34 kleink 843: if (how == SHUT_WR || how == SHUT_RDWR)
1.22 mycroft 844: return (*pr->pr_usrreq)(so, PRU_SHUTDOWN, (struct mbuf *)0,
845: (struct mbuf *)0, (struct mbuf *)0, (struct proc *)0);
1.1 cgd 846: return (0);
847: }
848:
1.14 mycroft 849: void
1.1 cgd 850: sorflush(so)
851: register struct socket *so;
852: {
853: register struct sockbuf *sb = &so->so_rcv;
854: register struct protosw *pr = so->so_proto;
855: register int s;
856: struct sockbuf asb;
857:
858: sb->sb_flags |= SB_NOINTR;
1.15 mycroft 859: (void) sblock(sb, M_WAITOK);
1.1 cgd 860: s = splimp();
861: socantrcvmore(so);
862: sbunlock(sb);
863: asb = *sb;
1.38 perry 864: memset((caddr_t)sb, 0, sizeof(*sb));
1.1 cgd 865: splx(s);
866: if (pr->pr_flags & PR_RIGHTS && pr->pr_domain->dom_dispose)
867: (*pr->pr_domain->dom_dispose)(asb.sb_mb);
868: sbrelease(&asb);
869: }
870:
1.14 mycroft 871: int
1.1 cgd 872: sosetopt(so, level, optname, m0)
873: register struct socket *so;
874: int level, optname;
875: struct mbuf *m0;
876: {
877: int error = 0;
878: register struct mbuf *m = m0;
879:
880: if (level != SOL_SOCKET) {
881: if (so->so_proto && so->so_proto->pr_ctloutput)
882: return ((*so->so_proto->pr_ctloutput)
883: (PRCO_SETOPT, so, level, optname, &m0));
884: error = ENOPROTOOPT;
885: } else {
886: switch (optname) {
887:
888: case SO_LINGER:
1.36 perry 889: if (m == NULL || m->m_len != sizeof(struct linger)) {
1.1 cgd 890: error = EINVAL;
891: goto bad;
892: }
893: so->so_linger = mtod(m, struct linger *)->l_linger;
894: /* fall thru... */
895:
896: case SO_DEBUG:
897: case SO_KEEPALIVE:
898: case SO_DONTROUTE:
899: case SO_USELOOPBACK:
900: case SO_BROADCAST:
901: case SO_REUSEADDR:
1.15 mycroft 902: case SO_REUSEPORT:
1.1 cgd 903: case SO_OOBINLINE:
1.26 thorpej 904: case SO_TIMESTAMP:
1.36 perry 905: if (m == NULL || m->m_len < sizeof(int)) {
1.1 cgd 906: error = EINVAL;
907: goto bad;
908: }
909: if (*mtod(m, int *))
910: so->so_options |= optname;
911: else
912: so->so_options &= ~optname;
913: break;
914:
915: case SO_SNDBUF:
916: case SO_RCVBUF:
917: case SO_SNDLOWAT:
918: case SO_RCVLOWAT:
1.28 thorpej 919: {
920: int optval;
921:
1.36 perry 922: if (m == NULL || m->m_len < sizeof(int)) {
1.1 cgd 923: error = EINVAL;
924: goto bad;
925: }
1.28 thorpej 926:
927: /*
928: * Values < 1 make no sense for any of these
929: * options, so disallow them.
930: */
931: optval = *mtod(m, int *);
932: if (optval < 1) {
933: error = EINVAL;
934: goto bad;
935: }
936:
1.1 cgd 937: switch (optname) {
938:
939: case SO_SNDBUF:
940: case SO_RCVBUF:
941: if (sbreserve(optname == SO_SNDBUF ?
942: &so->so_snd : &so->so_rcv,
1.28 thorpej 943: (u_long) optval) == 0) {
1.1 cgd 944: error = ENOBUFS;
945: goto bad;
946: }
947: break;
948:
1.28 thorpej 949: /*
950: * Make sure the low-water is never greater than
951: * the high-water.
952: */
1.1 cgd 953: case SO_SNDLOWAT:
1.28 thorpej 954: so->so_snd.sb_lowat =
955: (optval > so->so_snd.sb_hiwat) ?
956: so->so_snd.sb_hiwat : optval;
1.1 cgd 957: break;
958: case SO_RCVLOWAT:
1.28 thorpej 959: so->so_rcv.sb_lowat =
960: (optval > so->so_rcv.sb_hiwat) ?
961: so->so_rcv.sb_hiwat : optval;
1.1 cgd 962: break;
963: }
964: break;
1.28 thorpej 965: }
1.1 cgd 966:
967: case SO_SNDTIMEO:
968: case SO_RCVTIMEO:
969: {
970: struct timeval *tv;
971: short val;
972:
1.36 perry 973: if (m == NULL || m->m_len < sizeof(*tv)) {
1.1 cgd 974: error = EINVAL;
975: goto bad;
976: }
977: tv = mtod(m, struct timeval *);
1.19 cgd 978: if (tv->tv_sec * hz + tv->tv_usec / tick > SHRT_MAX) {
1.1 cgd 979: error = EDOM;
980: goto bad;
981: }
982: val = tv->tv_sec * hz + tv->tv_usec / tick;
983:
984: switch (optname) {
985:
986: case SO_SNDTIMEO:
987: so->so_snd.sb_timeo = val;
988: break;
989: case SO_RCVTIMEO:
990: so->so_rcv.sb_timeo = val;
991: break;
992: }
993: break;
994: }
995:
996: default:
997: error = ENOPROTOOPT;
998: break;
999: }
1.15 mycroft 1000: if (error == 0 && so->so_proto && so->so_proto->pr_ctloutput) {
1001: (void) ((*so->so_proto->pr_ctloutput)
1002: (PRCO_SETOPT, so, level, optname, &m0));
1003: m = NULL; /* freed by protocol */
1004: }
1.1 cgd 1005: }
1006: bad:
1007: if (m)
1008: (void) m_free(m);
1009: return (error);
1010: }
1011:
1.14 mycroft 1012: int
1.1 cgd 1013: sogetopt(so, level, optname, mp)
1014: register struct socket *so;
1015: int level, optname;
1016: struct mbuf **mp;
1017: {
1018: register struct mbuf *m;
1019:
1020: if (level != SOL_SOCKET) {
1021: if (so->so_proto && so->so_proto->pr_ctloutput) {
1022: return ((*so->so_proto->pr_ctloutput)
1023: (PRCO_GETOPT, so, level, optname, mp));
1024: } else
1025: return (ENOPROTOOPT);
1026: } else {
1027: m = m_get(M_WAIT, MT_SOOPTS);
1.36 perry 1028: m->m_len = sizeof(int);
1.1 cgd 1029:
1030: switch (optname) {
1031:
1032: case SO_LINGER:
1.36 perry 1033: m->m_len = sizeof(struct linger);
1.1 cgd 1034: mtod(m, struct linger *)->l_onoff =
1035: so->so_options & SO_LINGER;
1036: mtod(m, struct linger *)->l_linger = so->so_linger;
1037: break;
1038:
1039: case SO_USELOOPBACK:
1040: case SO_DONTROUTE:
1041: case SO_DEBUG:
1042: case SO_KEEPALIVE:
1043: case SO_REUSEADDR:
1.15 mycroft 1044: case SO_REUSEPORT:
1.1 cgd 1045: case SO_BROADCAST:
1046: case SO_OOBINLINE:
1.26 thorpej 1047: case SO_TIMESTAMP:
1.1 cgd 1048: *mtod(m, int *) = so->so_options & optname;
1049: break;
1050:
1051: case SO_TYPE:
1052: *mtod(m, int *) = so->so_type;
1053: break;
1054:
1055: case SO_ERROR:
1056: *mtod(m, int *) = so->so_error;
1057: so->so_error = 0;
1058: break;
1059:
1060: case SO_SNDBUF:
1061: *mtod(m, int *) = so->so_snd.sb_hiwat;
1062: break;
1063:
1064: case SO_RCVBUF:
1065: *mtod(m, int *) = so->so_rcv.sb_hiwat;
1066: break;
1067:
1068: case SO_SNDLOWAT:
1069: *mtod(m, int *) = so->so_snd.sb_lowat;
1070: break;
1071:
1072: case SO_RCVLOWAT:
1073: *mtod(m, int *) = so->so_rcv.sb_lowat;
1074: break;
1075:
1076: case SO_SNDTIMEO:
1077: case SO_RCVTIMEO:
1078: {
1079: int val = (optname == SO_SNDTIMEO ?
1080: so->so_snd.sb_timeo : so->so_rcv.sb_timeo);
1081:
1082: m->m_len = sizeof(struct timeval);
1083: mtod(m, struct timeval *)->tv_sec = val / hz;
1084: mtod(m, struct timeval *)->tv_usec =
1.27 kleink 1085: (val % hz) * tick;
1.1 cgd 1086: break;
1087: }
1088:
1089: default:
1090: (void)m_free(m);
1091: return (ENOPROTOOPT);
1092: }
1093: *mp = m;
1094: return (0);
1095: }
1096: }
1097:
1.14 mycroft 1098: void
1.1 cgd 1099: sohasoutofband(so)
1100: register struct socket *so;
1101: {
1102: struct proc *p;
1103:
1104: if (so->so_pgid < 0)
1105: gsignal(-so->so_pgid, SIGURG);
1106: else if (so->so_pgid > 0 && (p = pfind(so->so_pgid)) != 0)
1107: psignal(p, SIGURG);
1.2 cgd 1108: selwakeup(&so->so_rcv.sb_sel);
1.1 cgd 1109: }