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1.39 ! matt 1: /* $NetBSD: uipc_socket.c,v 1.38 1998/08/04 04:03:17 perry 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;
1.20 mycroft 483: s = splsoftnet(); /* XXX */
1.22 mycroft 484: error = (*so->so_proto->pr_usrreq)(so,
1.24 mycroft 485: (flags & MSG_OOB) ? PRU_SENDOOB : PRU_SEND,
486: top, addr, control, p);
1.1 cgd 487: splx(s);
488: if (dontroute)
489: so->so_options &= ~SO_DONTROUTE;
490: clen = 0;
491: control = 0;
492: top = 0;
493: mp = ⊤
494: if (error)
495: goto release;
496: } while (resid && space > 0);
497: } while (resid);
498:
499: release:
500: sbunlock(&so->so_snd);
501: out:
502: if (top)
503: m_freem(top);
504: if (control)
505: m_freem(control);
506: return (error);
507: }
508:
509: /*
510: * Implement receive operations on a socket.
511: * We depend on the way that records are added to the sockbuf
512: * by sbappend*. In particular, each record (mbufs linked through m_next)
513: * must begin with an address if the protocol so specifies,
514: * followed by an optional mbuf or mbufs containing ancillary data,
515: * and then zero or more mbufs of data.
516: * In order to avoid blocking network interrupts for the entire time here,
517: * we splx() while doing the actual copy to user space.
518: * Although the sockbuf is locked, new data may still be appended,
519: * and thus we must maintain consistency of the sockbuf during that time.
520: *
521: * The caller may receive the data as a single mbuf chain by supplying
522: * an mbuf **mp0 for use in returning the chain. The uio is then used
523: * only for the count in uio_resid.
524: */
1.3 andrew 525: int
1.1 cgd 526: soreceive(so, paddr, uio, mp0, controlp, flagsp)
527: register struct socket *so;
528: struct mbuf **paddr;
529: struct uio *uio;
530: struct mbuf **mp0;
531: struct mbuf **controlp;
532: int *flagsp;
533: {
534: register struct mbuf *m, **mp;
535: register int flags, len, error, s, offset;
536: struct protosw *pr = so->so_proto;
537: struct mbuf *nextrecord;
1.21 christos 538: int moff, type = 0;
1.3 andrew 539: int orig_resid = uio->uio_resid;
1.1 cgd 540:
541: mp = mp0;
542: if (paddr)
543: *paddr = 0;
544: if (controlp)
545: *controlp = 0;
546: if (flagsp)
547: flags = *flagsp &~ MSG_EOR;
548: else
549: flags = 0;
550: if (flags & MSG_OOB) {
551: m = m_get(M_WAIT, MT_DATA);
1.17 cgd 552: error = (*pr->pr_usrreq)(so, PRU_RCVOOB, m,
1.22 mycroft 553: (struct mbuf *)(long)(flags & MSG_PEEK), (struct mbuf *)0,
554: (struct proc *)0);
1.1 cgd 555: if (error)
556: goto bad;
557: do {
558: error = uiomove(mtod(m, caddr_t),
559: (int) min(uio->uio_resid, m->m_len), uio);
560: m = m_free(m);
561: } while (uio->uio_resid && error == 0 && m);
562: bad:
563: if (m)
564: m_freem(m);
565: return (error);
566: }
567: if (mp)
568: *mp = (struct mbuf *)0;
569: if (so->so_state & SS_ISCONFIRMING && uio->uio_resid)
1.22 mycroft 570: (*pr->pr_usrreq)(so, PRU_RCVD, (struct mbuf *)0,
571: (struct mbuf *)0, (struct mbuf *)0, (struct proc *)0);
1.1 cgd 572:
573: restart:
1.21 christos 574: if ((error = sblock(&so->so_rcv, SBLOCKWAIT(flags))) != 0)
1.1 cgd 575: return (error);
1.20 mycroft 576: s = splsoftnet();
1.1 cgd 577:
578: m = so->so_rcv.sb_mb;
579: /*
580: * If we have less data than requested, block awaiting more
581: * (subject to any timeout) if:
1.15 mycroft 582: * 1. the current count is less than the low water mark,
1.1 cgd 583: * 2. MSG_WAITALL is set, and it is possible to do the entire
1.15 mycroft 584: * receive operation at once if we block (resid <= hiwat), or
585: * 3. MSG_DONTWAIT is not set.
1.1 cgd 586: * If MSG_WAITALL is set but resid is larger than the receive buffer,
587: * we have to do the receive in sections, and thus risk returning
588: * a short count if a timeout or signal occurs after we start.
589: */
1.21 christos 590: if (m == 0 || (((flags & MSG_DONTWAIT) == 0 &&
1.15 mycroft 591: so->so_rcv.sb_cc < uio->uio_resid) &&
1.1 cgd 592: (so->so_rcv.sb_cc < so->so_rcv.sb_lowat ||
593: ((flags & MSG_WAITALL) && uio->uio_resid <= so->so_rcv.sb_hiwat)) &&
1.21 christos 594: m->m_nextpkt == 0 && (pr->pr_flags & PR_ATOMIC) == 0)) {
1.1 cgd 595: #ifdef DIAGNOSTIC
596: if (m == 0 && so->so_rcv.sb_cc)
597: panic("receive 1");
598: #endif
599: if (so->so_error) {
600: if (m)
1.15 mycroft 601: goto dontblock;
1.1 cgd 602: error = so->so_error;
603: if ((flags & MSG_PEEK) == 0)
604: so->so_error = 0;
605: goto release;
606: }
607: if (so->so_state & SS_CANTRCVMORE) {
608: if (m)
1.15 mycroft 609: goto dontblock;
1.1 cgd 610: else
611: goto release;
612: }
613: for (; m; m = m->m_next)
614: if (m->m_type == MT_OOBDATA || (m->m_flags & M_EOR)) {
615: m = so->so_rcv.sb_mb;
616: goto dontblock;
617: }
618: if ((so->so_state & (SS_ISCONNECTED|SS_ISCONNECTING)) == 0 &&
619: (so->so_proto->pr_flags & PR_CONNREQUIRED)) {
620: error = ENOTCONN;
621: goto release;
622: }
623: if (uio->uio_resid == 0)
624: goto release;
1.15 mycroft 625: if ((so->so_state & SS_NBIO) || (flags & MSG_DONTWAIT)) {
1.1 cgd 626: error = EWOULDBLOCK;
627: goto release;
628: }
629: sbunlock(&so->so_rcv);
630: error = sbwait(&so->so_rcv);
631: splx(s);
632: if (error)
633: return (error);
634: goto restart;
635: }
636: dontblock:
1.15 mycroft 637: #ifdef notyet /* XXXX */
638: if (uio->uio_procp)
639: uio->uio_procp->p_stats->p_ru.ru_msgrcv++;
640: #endif
1.1 cgd 641: nextrecord = m->m_nextpkt;
642: if (pr->pr_flags & PR_ADDR) {
643: #ifdef DIAGNOSTIC
644: if (m->m_type != MT_SONAME)
645: panic("receive 1a");
646: #endif
1.3 andrew 647: orig_resid = 0;
1.1 cgd 648: if (flags & MSG_PEEK) {
649: if (paddr)
650: *paddr = m_copy(m, 0, m->m_len);
651: m = m->m_next;
652: } else {
653: sbfree(&so->so_rcv, m);
654: if (paddr) {
655: *paddr = m;
656: so->so_rcv.sb_mb = m->m_next;
657: m->m_next = 0;
658: m = so->so_rcv.sb_mb;
659: } else {
660: MFREE(m, so->so_rcv.sb_mb);
661: m = so->so_rcv.sb_mb;
662: }
663: }
664: }
665: while (m && m->m_type == MT_CONTROL && error == 0) {
666: if (flags & MSG_PEEK) {
667: if (controlp)
668: *controlp = m_copy(m, 0, m->m_len);
669: m = m->m_next;
670: } else {
671: sbfree(&so->so_rcv, m);
672: if (controlp) {
673: if (pr->pr_domain->dom_externalize &&
674: mtod(m, struct cmsghdr *)->cmsg_type ==
675: SCM_RIGHTS)
676: error = (*pr->pr_domain->dom_externalize)(m);
677: *controlp = m;
678: so->so_rcv.sb_mb = m->m_next;
679: m->m_next = 0;
680: m = so->so_rcv.sb_mb;
681: } else {
682: MFREE(m, so->so_rcv.sb_mb);
683: m = so->so_rcv.sb_mb;
684: }
685: }
1.3 andrew 686: if (controlp) {
687: orig_resid = 0;
1.1 cgd 688: controlp = &(*controlp)->m_next;
1.3 andrew 689: }
1.1 cgd 690: }
691: if (m) {
692: if ((flags & MSG_PEEK) == 0)
693: m->m_nextpkt = nextrecord;
694: type = m->m_type;
695: if (type == MT_OOBDATA)
696: flags |= MSG_OOB;
697: }
698: moff = 0;
699: offset = 0;
700: while (m && uio->uio_resid > 0 && error == 0) {
701: if (m->m_type == MT_OOBDATA) {
702: if (type != MT_OOBDATA)
703: break;
704: } else if (type == MT_OOBDATA)
705: break;
706: #ifdef DIAGNOSTIC
707: else if (m->m_type != MT_DATA && m->m_type != MT_HEADER)
708: panic("receive 3");
709: #endif
710: so->so_state &= ~SS_RCVATMARK;
711: len = uio->uio_resid;
712: if (so->so_oobmark && len > so->so_oobmark - offset)
713: len = so->so_oobmark - offset;
714: if (len > m->m_len - moff)
715: len = m->m_len - moff;
716: /*
717: * If mp is set, just pass back the mbufs.
718: * Otherwise copy them out via the uio, then free.
719: * Sockbuf must be consistent here (points to current mbuf,
720: * it points to next record) when we drop priority;
721: * we must note any additions to the sockbuf when we
722: * block interrupts again.
723: */
724: if (mp == 0) {
725: splx(s);
726: error = uiomove(mtod(m, caddr_t) + moff, (int)len, uio);
1.20 mycroft 727: s = splsoftnet();
1.1 cgd 728: } else
729: uio->uio_resid -= len;
730: if (len == m->m_len - moff) {
731: if (m->m_flags & M_EOR)
732: flags |= MSG_EOR;
733: if (flags & MSG_PEEK) {
734: m = m->m_next;
735: moff = 0;
736: } else {
737: nextrecord = m->m_nextpkt;
738: sbfree(&so->so_rcv, m);
739: if (mp) {
740: *mp = m;
741: mp = &m->m_next;
742: so->so_rcv.sb_mb = m = m->m_next;
743: *mp = (struct mbuf *)0;
744: } else {
745: MFREE(m, so->so_rcv.sb_mb);
746: m = so->so_rcv.sb_mb;
747: }
748: if (m)
749: m->m_nextpkt = nextrecord;
750: }
751: } else {
752: if (flags & MSG_PEEK)
753: moff += len;
754: else {
755: if (mp)
756: *mp = m_copym(m, 0, len, M_WAIT);
757: m->m_data += len;
758: m->m_len -= len;
759: so->so_rcv.sb_cc -= len;
760: }
761: }
762: if (so->so_oobmark) {
763: if ((flags & MSG_PEEK) == 0) {
764: so->so_oobmark -= len;
765: if (so->so_oobmark == 0) {
766: so->so_state |= SS_RCVATMARK;
767: break;
768: }
1.7 cgd 769: } else {
1.1 cgd 770: offset += len;
1.7 cgd 771: if (offset == so->so_oobmark)
772: break;
773: }
1.1 cgd 774: }
775: if (flags & MSG_EOR)
776: break;
777: /*
778: * If the MSG_WAITALL flag is set (for non-atomic socket),
779: * we must not quit until "uio->uio_resid == 0" or an error
780: * termination. If a signal/timeout occurs, return
781: * with a short count but without error.
782: * Keep sockbuf locked against other readers.
783: */
784: while (flags & MSG_WAITALL && m == 0 && uio->uio_resid > 0 &&
1.3 andrew 785: !sosendallatonce(so) && !nextrecord) {
1.1 cgd 786: if (so->so_error || so->so_state & SS_CANTRCVMORE)
787: break;
788: error = sbwait(&so->so_rcv);
789: if (error) {
790: sbunlock(&so->so_rcv);
791: splx(s);
792: return (0);
793: }
1.21 christos 794: if ((m = so->so_rcv.sb_mb) != NULL)
1.1 cgd 795: nextrecord = m->m_nextpkt;
796: }
797: }
1.3 andrew 798:
799: if (m && pr->pr_flags & PR_ATOMIC) {
800: flags |= MSG_TRUNC;
801: if ((flags & MSG_PEEK) == 0)
802: (void) sbdroprecord(&so->so_rcv);
803: }
1.1 cgd 804: if ((flags & MSG_PEEK) == 0) {
805: if (m == 0)
806: so->so_rcv.sb_mb = nextrecord;
807: if (pr->pr_flags & PR_WANTRCVD && so->so_pcb)
1.22 mycroft 808: (*pr->pr_usrreq)(so, PRU_RCVD, (struct mbuf *)0,
809: (struct mbuf *)(long)flags, (struct mbuf *)0,
810: (struct proc *)0);
1.1 cgd 811: }
1.3 andrew 812: if (orig_resid == uio->uio_resid && orig_resid &&
813: (flags & MSG_EOR) == 0 && (so->so_state & SS_CANTRCVMORE) == 0) {
814: sbunlock(&so->so_rcv);
815: splx(s);
816: goto restart;
817: }
818:
1.1 cgd 819: if (flagsp)
820: *flagsp |= flags;
821: release:
822: sbunlock(&so->so_rcv);
823: splx(s);
824: return (error);
825: }
826:
1.14 mycroft 827: int
1.1 cgd 828: soshutdown(so, how)
1.34 kleink 829: struct socket *so;
830: int how;
1.1 cgd 831: {
1.34 kleink 832: struct protosw *pr = so->so_proto;
833:
834: if (!(how == SHUT_RD || how == SHUT_WR || how == SHUT_RDWR))
835: return (EINVAL);
1.1 cgd 836:
1.34 kleink 837: if (how == SHUT_RD || how == SHUT_RDWR)
1.1 cgd 838: sorflush(so);
1.34 kleink 839: if (how == SHUT_WR || how == SHUT_RDWR)
1.22 mycroft 840: return (*pr->pr_usrreq)(so, PRU_SHUTDOWN, (struct mbuf *)0,
841: (struct mbuf *)0, (struct mbuf *)0, (struct proc *)0);
1.1 cgd 842: return (0);
843: }
844:
1.14 mycroft 845: void
1.1 cgd 846: sorflush(so)
847: register struct socket *so;
848: {
849: register struct sockbuf *sb = &so->so_rcv;
850: register struct protosw *pr = so->so_proto;
851: register int s;
852: struct sockbuf asb;
853:
854: sb->sb_flags |= SB_NOINTR;
1.15 mycroft 855: (void) sblock(sb, M_WAITOK);
1.1 cgd 856: s = splimp();
857: socantrcvmore(so);
858: sbunlock(sb);
859: asb = *sb;
1.38 perry 860: memset((caddr_t)sb, 0, sizeof(*sb));
1.1 cgd 861: splx(s);
862: if (pr->pr_flags & PR_RIGHTS && pr->pr_domain->dom_dispose)
863: (*pr->pr_domain->dom_dispose)(asb.sb_mb);
864: sbrelease(&asb);
865: }
866:
1.14 mycroft 867: int
1.1 cgd 868: sosetopt(so, level, optname, m0)
869: register struct socket *so;
870: int level, optname;
871: struct mbuf *m0;
872: {
873: int error = 0;
874: register struct mbuf *m = m0;
875:
876: if (level != SOL_SOCKET) {
877: if (so->so_proto && so->so_proto->pr_ctloutput)
878: return ((*so->so_proto->pr_ctloutput)
879: (PRCO_SETOPT, so, level, optname, &m0));
880: error = ENOPROTOOPT;
881: } else {
882: switch (optname) {
883:
884: case SO_LINGER:
1.36 perry 885: if (m == NULL || m->m_len != sizeof(struct linger)) {
1.1 cgd 886: error = EINVAL;
887: goto bad;
888: }
889: so->so_linger = mtod(m, struct linger *)->l_linger;
890: /* fall thru... */
891:
892: case SO_DEBUG:
893: case SO_KEEPALIVE:
894: case SO_DONTROUTE:
895: case SO_USELOOPBACK:
896: case SO_BROADCAST:
897: case SO_REUSEADDR:
1.15 mycroft 898: case SO_REUSEPORT:
1.1 cgd 899: case SO_OOBINLINE:
1.26 thorpej 900: case SO_TIMESTAMP:
1.36 perry 901: if (m == NULL || m->m_len < sizeof(int)) {
1.1 cgd 902: error = EINVAL;
903: goto bad;
904: }
905: if (*mtod(m, int *))
906: so->so_options |= optname;
907: else
908: so->so_options &= ~optname;
909: break;
910:
911: case SO_SNDBUF:
912: case SO_RCVBUF:
913: case SO_SNDLOWAT:
914: case SO_RCVLOWAT:
1.28 thorpej 915: {
916: int optval;
917:
1.36 perry 918: if (m == NULL || m->m_len < sizeof(int)) {
1.1 cgd 919: error = EINVAL;
920: goto bad;
921: }
1.28 thorpej 922:
923: /*
924: * Values < 1 make no sense for any of these
925: * options, so disallow them.
926: */
927: optval = *mtod(m, int *);
928: if (optval < 1) {
929: error = EINVAL;
930: goto bad;
931: }
932:
1.1 cgd 933: switch (optname) {
934:
935: case SO_SNDBUF:
936: case SO_RCVBUF:
937: if (sbreserve(optname == SO_SNDBUF ?
938: &so->so_snd : &so->so_rcv,
1.28 thorpej 939: (u_long) optval) == 0) {
1.1 cgd 940: error = ENOBUFS;
941: goto bad;
942: }
943: break;
944:
1.28 thorpej 945: /*
946: * Make sure the low-water is never greater than
947: * the high-water.
948: */
1.1 cgd 949: case SO_SNDLOWAT:
1.28 thorpej 950: so->so_snd.sb_lowat =
951: (optval > so->so_snd.sb_hiwat) ?
952: so->so_snd.sb_hiwat : optval;
1.1 cgd 953: break;
954: case SO_RCVLOWAT:
1.28 thorpej 955: so->so_rcv.sb_lowat =
956: (optval > so->so_rcv.sb_hiwat) ?
957: so->so_rcv.sb_hiwat : optval;
1.1 cgd 958: break;
959: }
960: break;
1.28 thorpej 961: }
1.1 cgd 962:
963: case SO_SNDTIMEO:
964: case SO_RCVTIMEO:
965: {
966: struct timeval *tv;
967: short val;
968:
1.36 perry 969: if (m == NULL || m->m_len < sizeof(*tv)) {
1.1 cgd 970: error = EINVAL;
971: goto bad;
972: }
973: tv = mtod(m, struct timeval *);
1.19 cgd 974: if (tv->tv_sec * hz + tv->tv_usec / tick > SHRT_MAX) {
1.1 cgd 975: error = EDOM;
976: goto bad;
977: }
978: val = tv->tv_sec * hz + tv->tv_usec / tick;
979:
980: switch (optname) {
981:
982: case SO_SNDTIMEO:
983: so->so_snd.sb_timeo = val;
984: break;
985: case SO_RCVTIMEO:
986: so->so_rcv.sb_timeo = val;
987: break;
988: }
989: break;
990: }
991:
992: default:
993: error = ENOPROTOOPT;
994: break;
995: }
1.15 mycroft 996: if (error == 0 && so->so_proto && so->so_proto->pr_ctloutput) {
997: (void) ((*so->so_proto->pr_ctloutput)
998: (PRCO_SETOPT, so, level, optname, &m0));
999: m = NULL; /* freed by protocol */
1000: }
1.1 cgd 1001: }
1002: bad:
1003: if (m)
1004: (void) m_free(m);
1005: return (error);
1006: }
1007:
1.14 mycroft 1008: int
1.1 cgd 1009: sogetopt(so, level, optname, mp)
1010: register struct socket *so;
1011: int level, optname;
1012: struct mbuf **mp;
1013: {
1014: register struct mbuf *m;
1015:
1016: if (level != SOL_SOCKET) {
1017: if (so->so_proto && so->so_proto->pr_ctloutput) {
1018: return ((*so->so_proto->pr_ctloutput)
1019: (PRCO_GETOPT, so, level, optname, mp));
1020: } else
1021: return (ENOPROTOOPT);
1022: } else {
1023: m = m_get(M_WAIT, MT_SOOPTS);
1.36 perry 1024: m->m_len = sizeof(int);
1.1 cgd 1025:
1026: switch (optname) {
1027:
1028: case SO_LINGER:
1.36 perry 1029: m->m_len = sizeof(struct linger);
1.1 cgd 1030: mtod(m, struct linger *)->l_onoff =
1031: so->so_options & SO_LINGER;
1032: mtod(m, struct linger *)->l_linger = so->so_linger;
1033: break;
1034:
1035: case SO_USELOOPBACK:
1036: case SO_DONTROUTE:
1037: case SO_DEBUG:
1038: case SO_KEEPALIVE:
1039: case SO_REUSEADDR:
1.15 mycroft 1040: case SO_REUSEPORT:
1.1 cgd 1041: case SO_BROADCAST:
1042: case SO_OOBINLINE:
1.26 thorpej 1043: case SO_TIMESTAMP:
1.1 cgd 1044: *mtod(m, int *) = so->so_options & optname;
1045: break;
1046:
1047: case SO_TYPE:
1048: *mtod(m, int *) = so->so_type;
1049: break;
1050:
1051: case SO_ERROR:
1052: *mtod(m, int *) = so->so_error;
1053: so->so_error = 0;
1054: break;
1055:
1056: case SO_SNDBUF:
1057: *mtod(m, int *) = so->so_snd.sb_hiwat;
1058: break;
1059:
1060: case SO_RCVBUF:
1061: *mtod(m, int *) = so->so_rcv.sb_hiwat;
1062: break;
1063:
1064: case SO_SNDLOWAT:
1065: *mtod(m, int *) = so->so_snd.sb_lowat;
1066: break;
1067:
1068: case SO_RCVLOWAT:
1069: *mtod(m, int *) = so->so_rcv.sb_lowat;
1070: break;
1071:
1072: case SO_SNDTIMEO:
1073: case SO_RCVTIMEO:
1074: {
1075: int val = (optname == SO_SNDTIMEO ?
1076: so->so_snd.sb_timeo : so->so_rcv.sb_timeo);
1077:
1078: m->m_len = sizeof(struct timeval);
1079: mtod(m, struct timeval *)->tv_sec = val / hz;
1080: mtod(m, struct timeval *)->tv_usec =
1.27 kleink 1081: (val % hz) * tick;
1.1 cgd 1082: break;
1083: }
1084:
1085: default:
1086: (void)m_free(m);
1087: return (ENOPROTOOPT);
1088: }
1089: *mp = m;
1090: return (0);
1091: }
1092: }
1093:
1.14 mycroft 1094: void
1.1 cgd 1095: sohasoutofband(so)
1096: register struct socket *so;
1097: {
1098: struct proc *p;
1099:
1100: if (so->so_pgid < 0)
1101: gsignal(-so->so_pgid, SIGURG);
1102: else if (so->so_pgid > 0 && (p = pfind(so->so_pgid)) != 0)
1103: psignal(p, SIGURG);
1.2 cgd 1104: selwakeup(&so->so_rcv.sb_sel);
1.1 cgd 1105: }