Annotation of src/sys/netinet/udp_usrreq.c, Revision 1.66.4.6
1.66.4.6! jmc 1: /* $NetBSD: udp_usrreq.c,v 1.66.4.5 2001/05/09 19:37:41 he Exp $ */
1.48 itojun 2:
3: /*
4: * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
5: * All rights reserved.
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. Neither the name of the project nor the names of its contributors
16: * may be used to endorse or promote products derived from this software
17: * without specific prior written permission.
18: *
19: * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
20: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22: * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
23: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29: * SUCH DAMAGE.
30: */
1.14 cgd 31:
1.1 cgd 32: /*
1.44 thorpej 33: * Copyright (c) 1982, 1986, 1988, 1990, 1993, 1995
1.13 mycroft 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.
44: * 3. All advertising materials mentioning features or use of this software
45: * must display the following acknowledgement:
46: * This product includes software developed by the University of
47: * California, Berkeley and its contributors.
48: * 4. Neither the name of the University nor the names of its contributors
49: * may be used to endorse or promote products derived from this software
50: * without specific prior written permission.
51: *
52: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
53: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
54: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
55: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
56: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
57: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
58: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
59: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
60: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
61: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
62: * SUCH DAMAGE.
63: *
1.44 thorpej 64: * @(#)udp_usrreq.c 8.6 (Berkeley) 5/23/95
1.1 cgd 65: */
1.50 thorpej 66:
67: #include "opt_ipsec.h"
1.64 ws 68: #include "opt_ipkdb.h"
1.1 cgd 69:
1.5 mycroft 70: #include <sys/param.h>
71: #include <sys/malloc.h>
72: #include <sys/mbuf.h>
73: #include <sys/protosw.h>
74: #include <sys/socket.h>
75: #include <sys/socketvar.h>
1.13 mycroft 76: #include <sys/errno.h>
1.5 mycroft 77: #include <sys/stat.h>
1.27 christos 78: #include <sys/systm.h>
79: #include <sys/proc.h>
1.53 itojun 80: #include <sys/domain.h>
1.27 christos 81:
82: #include <vm/vm.h>
83: #include <sys/sysctl.h>
1.1 cgd 84:
1.5 mycroft 85: #include <net/if.h>
86: #include <net/route.h>
1.1 cgd 87:
1.5 mycroft 88: #include <netinet/in.h>
89: #include <netinet/in_systm.h>
1.15 cgd 90: #include <netinet/in_var.h>
1.5 mycroft 91: #include <netinet/ip.h>
92: #include <netinet/in_pcb.h>
93: #include <netinet/ip_var.h>
94: #include <netinet/ip_icmp.h>
95: #include <netinet/udp.h>
96: #include <netinet/udp_var.h>
1.1 cgd 97:
1.53 itojun 98: #ifdef INET6
99: #include <netinet/ip6.h>
100: #include <netinet/icmp6.h>
101: #include <netinet6/ip6_var.h>
102: #include <netinet6/in6_pcb.h>
103: #include <netinet6/udp6_var.h>
104: #endif
105:
106: #ifdef PULLDOWN_TEST
107: #ifndef INET6
108: /* always need ip6.h for IP6_EXTHDR_GET */
109: #include <netinet/ip6.h>
110: #endif
111: #endif
112:
1.66.4.5 he 113: #include "faith.h"
114: #if defined(NFAITH) && NFAITH > 0
115: #include <net/if_faith.h>
116: #endif
117:
1.27 christos 118: #include <machine/stdarg.h>
119:
1.48 itojun 120: #ifdef IPSEC
121: #include <netinet6/ipsec.h>
122: #include <netkey/key.h>
123: #include <netkey/key_debug.h>
124: #endif /*IPSEC*/
125:
1.64 ws 126: #ifdef IPKDB
127: #include <ipkdb/ipkdb.h>
128: #endif
129:
1.8 mycroft 130: /*
131: * UDP protocol implementation.
132: * Per RFC 768, August, 1980.
133: */
134: #ifndef COMPAT_42
135: int udpcksum = 1;
136: #else
137: int udpcksum = 0; /* XXX */
138: #endif
139:
1.53 itojun 140: static void udp4_sendup __P((struct mbuf *, int, struct sockaddr *,
141: struct socket *));
142: static int udp4_realinput __P((struct sockaddr_in *, struct sockaddr_in *,
143: struct mbuf *, int));
144: #ifdef INET6
145: static void udp6_sendup __P((struct mbuf *, int, struct sockaddr *,
146: struct socket *));
147: static int in6_mcmatch __P((struct in6pcb *, struct in6_addr *,
148: struct ifnet *));
149: static int udp6_realinput __P((int, struct sockaddr_in6 *,
150: struct sockaddr_in6 *, struct mbuf *, int));
151: #endif
1.13 mycroft 152: static void udp_notify __P((struct inpcb *, int));
1.7 mycroft 153:
1.26 mycroft 154: #ifndef UDBHASHSIZE
155: #define UDBHASHSIZE 128
156: #endif
157: int udbhashsize = UDBHASHSIZE;
158:
1.7 mycroft 159: void
1.1 cgd 160: udp_init()
161: {
1.18 mycroft 162:
1.35 mycroft 163: in_pcbinit(&udbtable, udbhashsize, udbhashsize);
1.1 cgd 164: }
165:
1.56 itojun 166: #ifndef UDP6
1.7 mycroft 167: void
1.27 christos 168: #if __STDC__
169: udp_input(struct mbuf *m, ...)
170: #else
171: udp_input(m, va_alist)
172: struct mbuf *m;
173: va_dcl
174: #endif
1.1 cgd 175: {
1.53 itojun 176: va_list ap;
177: struct sockaddr_in src, dst;
178: struct ip *ip;
179: struct udphdr *uh;
180: int iphlen, proto;
181: int len;
182: int n;
183:
184: va_start(ap, m);
185: iphlen = va_arg(ap, int);
186: proto = va_arg(ap, int);
187: va_end(ap);
188:
189: udpstat.udps_ipackets++;
190:
191: #ifndef PULLDOWN_TEST
192: /*
193: * Strip IP options, if any; should skip this,
194: * make available to user, and use on returned packets,
195: * but we don't yet have a way to check the checksum
196: * with options still present.
197: */
198: if (iphlen > sizeof (struct ip)) {
199: ip_stripoptions(m, (struct mbuf *)0);
200: iphlen = sizeof(struct ip);
201: }
202: #else
203: /*
204: * we may enable the above code if we save and pass IPv4 options
205: * to the userland.
206: */
207: #endif
208:
209: /*
210: * Get IP and UDP header together in first mbuf.
211: */
212: ip = mtod(m, struct ip *);
213: #ifndef PULLDOWN_TEST
214: if (m->m_len < iphlen + sizeof(struct udphdr)) {
215: if ((m = m_pullup(m, iphlen + sizeof(struct udphdr))) == 0) {
216: udpstat.udps_hdrops++;
217: return;
218: }
219: ip = mtod(m, struct ip *);
220: }
221: uh = (struct udphdr *)((caddr_t)ip + iphlen);
222: #else
223: IP6_EXTHDR_GET(uh, struct udphdr *, m, iphlen, sizeof(struct udphdr));
224: if (uh == NULL) {
225: udpstat.udps_hdrops++;
226: return;
227: }
228: #endif
229:
1.57 itojun 230: /* destination port of 0 is illegal, based on RFC768. */
231: if (uh->uh_dport == 0)
232: goto bad;
233:
1.53 itojun 234: /*
235: * Make mbuf data length reflect UDP length.
236: * If not enough data to reflect UDP length, drop.
237: */
238: len = ntohs((u_int16_t)uh->uh_ulen);
239: if (ip->ip_len != iphlen + len) {
1.66.4.1 sommerfe 240: if (ip->ip_len < iphlen + len || len < sizeof(struct udphdr)) {
1.53 itojun 241: udpstat.udps_badlen++;
242: goto bad;
243: }
244: m_adj(m, iphlen + len - ip->ip_len);
245: }
246:
247: /*
248: * Checksum extended UDP header and data.
249: */
250: if (uh->uh_sum) {
251: if (in4_cksum(m, IPPROTO_UDP, iphlen, len) != 0) {
252: udpstat.udps_badsum++;
253: m_freem(m);
254: return;
255: }
256: }
257:
258: /* construct source and dst sockaddrs. */
259: bzero(&src, sizeof(src));
260: src.sin_family = AF_INET;
261: src.sin_len = sizeof(struct sockaddr_in);
262: bcopy(&ip->ip_src, &src.sin_addr, sizeof(src.sin_addr));
263: src.sin_port = uh->uh_sport;
264: bzero(&dst, sizeof(dst));
265: dst.sin_family = AF_INET;
266: dst.sin_len = sizeof(struct sockaddr_in);
267: bcopy(&ip->ip_dst, &dst.sin_addr, sizeof(dst.sin_addr));
268: dst.sin_port = uh->uh_dport;
269:
270: n = udp4_realinput(&src, &dst, m, iphlen);
271: #ifdef INET6
272: if (IN_MULTICAST(ip->ip_dst.s_addr) || n == 0) {
273: struct sockaddr_in6 src6, dst6;
274:
275: bzero(&src6, sizeof(src6));
276: src6.sin6_family = AF_INET6;
277: src6.sin6_len = sizeof(struct sockaddr_in6);
278: src6.sin6_addr.s6_addr[10] = src6.sin6_addr.s6_addr[11] = 0xff;
279: bcopy(&ip->ip_src, &src6.sin6_addr.s6_addr[12],
280: sizeof(ip->ip_src));
281: src6.sin6_port = uh->uh_sport;
282: bzero(&dst6, sizeof(dst6));
283: dst6.sin6_family = AF_INET6;
284: dst6.sin6_len = sizeof(struct sockaddr_in6);
285: dst6.sin6_addr.s6_addr[10] = dst6.sin6_addr.s6_addr[11] = 0xff;
286: bcopy(&ip->ip_dst, &dst6.sin6_addr.s6_addr[12],
287: sizeof(ip->ip_dst));
288: dst6.sin6_port = uh->uh_dport;
289:
290: n += udp6_realinput(AF_INET, &src6, &dst6, m, iphlen);
291: }
292: #endif
293:
294: if (n == 0) {
295: if (m->m_flags & (M_BCAST | M_MCAST)) {
296: udpstat.udps_noportbcast++;
297: goto bad;
298: }
1.61 itojun 299: udpstat.udps_noport++;
1.64 ws 300: #ifdef IPKDB
1.53 itojun 301: if (checkipkdb(&ip->ip_src, uh->uh_sport, uh->uh_dport,
302: m, iphlen + sizeof(struct udphdr),
303: m->m_pkthdr.len - iphlen - sizeof(struct udphdr))) {
304: /*
305: * It was a debugger connect packet,
306: * just drop it now
307: */
308: goto bad;
309: }
310: #endif
311: icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0);
312: m = NULL;
313: }
314:
315: bad:
316: if (m)
317: m_freem(m);
318: }
319:
320: #ifdef INET6
321: int
322: udp6_input(mp, offp, proto)
323: struct mbuf **mp;
324: int *offp, proto;
325: {
326: struct mbuf *m = *mp;
327: int off = *offp;
328: struct sockaddr_in6 src, dst;
329: struct ip6_hdr *ip6;
330: struct udphdr *uh;
331: u_int32_t plen, ulen;
332:
1.66.4.5 he 333: #ifndef PULLDOWN_TEST
334: IP6_EXTHDR_CHECK(m, off, sizeof(struct udphdr), IPPROTO_DONE);
335: #endif
336: ip6 = mtod(m, struct ip6_hdr *);
337:
1.53 itojun 338: #if defined(NFAITH) && 0 < NFAITH
1.66.4.5 he 339: if (faithprefix(&ip6->ip6_dst)) {
340: /* send icmp6 host unreach? */
341: m_freem(m);
342: return IPPROTO_DONE;
1.53 itojun 343: }
344: #endif
345:
346: udp6stat.udp6s_ipackets++;
347:
348: /* check for jumbogram is done in ip6_input. we can trust pkthdr.len */
349: plen = m->m_pkthdr.len - off;
350: #ifndef PULLDOWN_TEST
351: uh = (struct udphdr *)((caddr_t)ip6 + off);
352: #else
353: IP6_EXTHDR_GET(uh, struct udphdr *, m, off, sizeof(struct udphdr));
354: if (uh == NULL) {
355: ip6stat.ip6s_tooshort++;
356: return IPPROTO_DONE;
357: }
358: #endif
359: ulen = ntohs((u_short)uh->uh_ulen);
360: if (ulen == 0 && plen > 0xffff)
361: ulen = plen;
362:
363: if (plen != ulen) {
364: udp6stat.udp6s_badlen++;
1.54 itojun 365: goto bad;
366: }
367:
1.57 itojun 368: /* destination port of 0 is illegal, based on RFC768. */
369: if (uh->uh_dport == 0)
370: goto bad;
371:
1.54 itojun 372: /* Be proactive about malicious use of IPv4 mapped address */
373: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
374: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
375: /* XXX stat */
1.53 itojun 376: goto bad;
377: }
378:
379: /*
380: * Checksum extended UDP header and data.
381: */
1.66.4.6! jmc 382: if (uh->uh_sum == 0) {
1.53 itojun 383: udp6stat.udp6s_nosum++;
1.66.4.6! jmc 384: goto bad;
! 385: }
! 386: if (in6_cksum(m, IPPROTO_UDP, off, ulen) != 0) {
1.53 itojun 387: udp6stat.udp6s_badsum++;
388: goto bad;
389: }
390:
391: /*
392: * Construct source and dst sockaddrs.
393: * Note that ifindex (s6_addr16[1]) is already filled.
394: */
395: bzero(&src, sizeof(src));
396: src.sin6_family = AF_INET6;
397: src.sin6_len = sizeof(struct sockaddr_in6);
398: bcopy(&ip6->ip6_src, &src.sin6_addr, sizeof(src.sin6_addr));
399: if (IN6_IS_SCOPE_LINKLOCAL(&src.sin6_addr))
400: src.sin6_addr.s6_addr16[1] = 0;
401: if (m->m_pkthdr.rcvif) {
402: if (IN6_IS_SCOPE_LINKLOCAL(&src.sin6_addr))
403: src.sin6_scope_id = m->m_pkthdr.rcvif->if_index;
404: else
405: src.sin6_scope_id = 0;
406: }
407: src.sin6_port = uh->uh_sport;
408: bzero(&dst, sizeof(dst));
409: dst.sin6_family = AF_INET6;
410: dst.sin6_len = sizeof(struct sockaddr_in6);
411: bcopy(&ip6->ip6_dst, &dst.sin6_addr, sizeof(dst.sin6_addr));
412: if (IN6_IS_SCOPE_LINKLOCAL(&dst.sin6_addr))
413: dst.sin6_addr.s6_addr16[1] = 0;
414: if (m->m_pkthdr.rcvif) {
415: if (IN6_IS_SCOPE_LINKLOCAL(&dst.sin6_addr))
416: dst.sin6_scope_id = m->m_pkthdr.rcvif->if_index;
417: else
418: dst.sin6_scope_id = 0;
419: }
420: dst.sin6_port = uh->uh_dport;
421:
422: if (udp6_realinput(AF_INET6, &src, &dst, m, off) == 0) {
423: if (m->m_flags & M_MCAST) {
424: udp6stat.udp6s_noportmcast++;
425: goto bad;
426: }
1.61 itojun 427: udp6stat.udp6s_noport++;
1.53 itojun 428: icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0);
429: m = NULL;
430: }
431:
432: bad:
433: if (m)
434: m_freem(m);
435: return IPPROTO_DONE;
436: }
437: #endif
438:
439: static void
440: udp4_sendup(m, off, src, so)
441: struct mbuf *m;
442: int off; /* offset of data portion */
443: struct sockaddr *src;
444: struct socket *so;
445: {
446: struct mbuf *opts = NULL;
447: struct mbuf *n;
448: struct inpcb *inp = NULL;
449: #ifdef INET6
450: struct in6pcb *in6p = NULL;
451: #endif
452:
453: if (!so)
454: return;
455: switch (so->so_proto->pr_domain->dom_family) {
456: case AF_INET:
457: inp = sotoinpcb(so);
458: break;
459: #ifdef INET6
460: case AF_INET6:
461: in6p = sotoin6pcb(so);
462: break;
463: #endif
464: default:
465: return;
466: }
467:
468: #ifdef IPSEC
469: /* check AH/ESP integrity. */
470: if (so != NULL && ipsec4_in_reject_so(m, so)) {
471: ipsecstat.in_polvio++;
472: return;
473: }
474: #endif /*IPSEC*/
475:
476: if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
477: if (inp && (inp->inp_flags & INP_CONTROLOPTS
478: || so->so_options & SO_TIMESTAMP)) {
479: struct ip *ip = mtod(n, struct ip *);
480: ip_savecontrol(inp, &opts, ip, n);
481: }
482:
483: m_adj(n, off);
484: if (sbappendaddr(&so->so_rcv, src, n,
485: opts) == 0) {
486: m_freem(n);
487: if (opts)
488: m_freem(opts);
489: } else
490: sorwakeup(so);
491: }
492: }
493:
494: #ifdef INET6
495: static void
496: udp6_sendup(m, off, src, so)
497: struct mbuf *m;
498: int off; /* offset of data portion */
499: struct sockaddr *src;
500: struct socket *so;
501: {
502: struct mbuf *opts = NULL;
503: struct mbuf *n;
504: struct in6pcb *in6p = NULL;
505:
506: if (!so)
507: return;
508: if (so->so_proto->pr_domain->dom_family != AF_INET6)
509: return;
510: in6p = sotoin6pcb(so);
511:
512: #ifdef IPSEC
513: /* check AH/ESP integrity. */
514: if (so != NULL && ipsec6_in_reject_so(m, so)) {
515: ipsec6stat.in_polvio++;
516: return;
517: }
518: #endif /*IPSEC*/
519:
520: if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
521: if (in6p && (in6p->in6p_flags & IN6P_CONTROLOPTS
522: || in6p->in6p_socket->so_options & SO_TIMESTAMP)) {
523: struct ip6_hdr *ip6 = mtod(n, struct ip6_hdr *);
524: ip6_savecontrol(in6p, &opts, ip6, n);
525: }
526:
527: m_adj(n, off);
528: if (sbappendaddr(&so->so_rcv, src, n, opts) == 0) {
529: m_freem(n);
530: if (opts)
531: m_freem(opts);
532: udp6stat.udp6s_fullsock++;
533: } else
534: sorwakeup(so);
535: }
536: }
537: #endif
538:
539: static int
540: udp4_realinput(src, dst, m, off)
541: struct sockaddr_in *src;
542: struct sockaddr_in *dst;
543: struct mbuf *m;
544: int off; /* offset of udphdr */
545: {
546: u_int16_t *sport, *dport;
547: int rcvcnt;
548: struct in_addr *src4, *dst4;
549: struct inpcb *inp;
550:
551: rcvcnt = 0;
552: off += sizeof(struct udphdr); /* now, offset of payload */
553:
554: if (src->sin_family != AF_INET || dst->sin_family != AF_INET)
555: goto bad;
556:
557: src4 = &src->sin_addr;
558: sport = &src->sin_port;
559: dst4 = &dst->sin_addr;
560: dport = &dst->sin_port;
561:
1.66.4.2 he 562: if (IN_MULTICAST(dst4->s_addr) ||
1.53 itojun 563: in_broadcast(*dst4, m->m_pkthdr.rcvif)) {
564: struct inpcb *last;
565: /*
566: * Deliver a multicast or broadcast datagram to *all* sockets
567: * for which the local and remote addresses and ports match
568: * those of the incoming datagram. This allows more than
569: * one process to receive multi/broadcasts on the same port.
570: * (This really ought to be done for unicast datagrams as
571: * well, but that would cause problems with existing
572: * applications that open both address-specific sockets and
573: * a wildcard socket listening to the same port -- they would
574: * end up receiving duplicates of every unicast datagram.
575: * Those applications open the multiple sockets to overcome an
576: * inadequacy of the UDP socket interface, but for backwards
577: * compatibility we avoid the problem here rather than
578: * fixing the interface. Maybe 4.5BSD will remedy this?)
579: */
580:
581: /*
582: * KAME note: usually we drop udpiphdr from mbuf here.
583: * we need udpiphdr for iPsec processing so we do that later.
584: */
585: /*
586: * Locate pcb(s) for datagram.
587: */
588: for (inp = udbtable.inpt_queue.cqh_first;
589: inp != (struct inpcb *)&udbtable.inpt_queue;
590: inp = inp->inp_queue.cqe_next) {
591: if (inp->inp_lport != *dport)
592: continue;
593: if (!in_nullhost(inp->inp_laddr)) {
594: if (!in_hosteq(inp->inp_laddr, *dst4))
595: continue;
596: }
597: if (!in_nullhost(inp->inp_faddr)) {
598: if (!in_hosteq(inp->inp_faddr, *src4) ||
599: inp->inp_fport != *sport)
600: continue;
601: }
602:
603: last = inp;
604: udp4_sendup(m, off, (struct sockaddr *)src,
605: inp->inp_socket);
606: rcvcnt++;
607:
608: /*
609: * Don't look for additional matches if this one does
610: * not have either the SO_REUSEPORT or SO_REUSEADDR
611: * socket options set. This heuristic avoids searching
612: * through all pcbs in the common case of a non-shared
613: * port. It assumes that an application will never
614: * clear these options after setting them.
615: */
616: if ((inp->inp_socket->so_options &
617: (SO_REUSEPORT|SO_REUSEADDR)) == 0)
618: break;
619: }
620:
621: #if 0
622: if (last == NULL) {
623: /*
624: * No matching pcb found; discard datagram.
625: * (No need to send an ICMP Port Unreachable
626: * for a broadcast or multicast datgram.)
627: */
628: udpstat.udps_noportbcast++;
629: goto bad;
630: }
631: #endif
632: } else {
633: /*
634: * Locate pcb for datagram.
635: */
636: inp = in_pcblookup_connect(&udbtable, *src4, *sport, *dst4, *dport);
637: if (inp == 0) {
638: ++udpstat.udps_pcbhashmiss;
639: inp = in_pcblookup_bind(&udbtable, *dst4, *dport);
640: if (inp == 0) {
641: #if 0
642: struct mbuf *n;
643:
644: if (m->m_flags & (M_BCAST | M_MCAST)) {
645: udpstat.udps_noportbcast++;
646: goto bad;
647: }
1.61 itojun 648: udpstat.udps_noport++;
1.64 ws 649: #ifdef IPKDB
1.53 itojun 650: if (checkipkdb(src4, *sport, *dport, m, off,
651: m->m_pkthdr.len - off)) {
652: /*
653: * It was a debugger connect packet,
654: * just drop it now
655: */
656: goto bad;
657: }
658: #endif
659: if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
660: icmp_error(n, ICMP_UNREACH,
661: ICMP_UNREACH_PORT, 0, 0);
662: }
663: #endif
664: return rcvcnt;
665: }
666: }
667:
668: udp4_sendup(m, off, (struct sockaddr *)src, inp->inp_socket);
669: rcvcnt++;
670: }
671:
672: bad:
673: return rcvcnt;
674: }
675:
676: #ifdef INET6
677: static int
678: in6_mcmatch(in6p, ia6, ifp)
679: struct in6pcb *in6p;
1.66 augustss 680: struct in6_addr *ia6;
1.53 itojun 681: struct ifnet *ifp;
682: {
683: struct ip6_moptions *im6o = in6p->in6p_moptions;
684: struct in6_multi_mship *imm;
685:
686: if (im6o == NULL)
687: return 0;
688:
689: for (imm = im6o->im6o_memberships.lh_first; imm != NULL;
690: imm = imm->i6mm_chain.le_next) {
691: if ((ifp == NULL ||
692: imm->i6mm_maddr->in6m_ifp == ifp) &&
693: IN6_ARE_ADDR_EQUAL(&imm->i6mm_maddr->in6m_addr,
694: ia6))
695: return 1;
696: }
697: return 0;
698: }
699:
700: static int
701: udp6_realinput(af, src, dst, m, off)
702: int af; /* af on packet */
703: struct sockaddr_in6 *src;
704: struct sockaddr_in6 *dst;
705: struct mbuf *m;
706: int off; /* offset of udphdr */
707: {
708: u_int16_t *sport, *dport;
709: int rcvcnt;
710: struct in6_addr *src6, *dst6;
1.66.4.3 he 711: struct in_addr *dst4;
1.53 itojun 712: struct in6pcb *in6p;
713:
714: rcvcnt = 0;
715: off += sizeof(struct udphdr); /* now, offset of payload */
716:
717: if (af != AF_INET && af != AF_INET6)
718: goto bad;
719: if (src->sin6_family != AF_INET6 || dst->sin6_family != AF_INET6)
720: goto bad;
721:
722: src6 = &src->sin6_addr;
723: sport = &src->sin6_port;
724: dst6 = &dst->sin6_addr;
725: dport = &dst->sin6_port;
1.66.4.3 he 726: dst4 = (struct in_addr *)&dst->sin6_addr.s6_addr32[12];
1.53 itojun 727:
728: if (IN6_IS_ADDR_MULTICAST(dst6)
1.66.4.2 he 729: || (af == AF_INET && IN_MULTICAST(dst4->s_addr))) {
1.53 itojun 730: struct in6pcb *last;
731: /*
732: * Deliver a multicast or broadcast datagram to *all* sockets
733: * for which the local and remote addresses and ports match
734: * those of the incoming datagram. This allows more than
735: * one process to receive multi/broadcasts on the same port.
736: * (This really ought to be done for unicast datagrams as
737: * well, but that would cause problems with existing
738: * applications that open both address-specific sockets and
739: * a wildcard socket listening to the same port -- they would
740: * end up receiving duplicates of every unicast datagram.
741: * Those applications open the multiple sockets to overcome an
742: * inadequacy of the UDP socket interface, but for backwards
743: * compatibility we avoid the problem here rather than
744: * fixing the interface. Maybe 4.5BSD will remedy this?)
745: */
746:
747: /*
748: * KAME note: usually we drop udpiphdr from mbuf here.
749: * we need udpiphdr for iPsec processing so we do that later.
750: */
751: /*
752: * Locate pcb(s) for datagram.
753: */
754: for (in6p = udb6.in6p_next; in6p != &udb6;
755: in6p = in6p->in6p_next) {
756: if (in6p->in6p_lport != *dport)
757: continue;
758: if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) {
759: if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, dst6)
760: && !in6_mcmatch(in6p, dst6, m->m_pkthdr.rcvif))
761: continue;
762: }
1.55 itojun 763: #ifndef INET6_BINDV6ONLY
764: else {
765: if (IN6_IS_ADDR_V4MAPPED(dst6)
766: && (in6p->in6p_flags & IN6P_BINDV6ONLY))
767: continue;
768: }
769: #endif
1.53 itojun 770: if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
771: if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, src6)
772: || in6p->in6p_fport != *sport)
773: continue;
774: }
1.55 itojun 775: #ifndef INET6_BINDV6ONLY
776: else {
777: if (IN6_IS_ADDR_V4MAPPED(src6)
778: && (in6p->in6p_flags & IN6P_BINDV6ONLY))
779: continue;
780: }
781: #endif
1.53 itojun 782:
783: last = in6p;
784: udp6_sendup(m, off, (struct sockaddr *)src,
785: in6p->in6p_socket);
786: rcvcnt++;
787:
788: /*
789: * Don't look for additional matches if this one does
790: * not have either the SO_REUSEPORT or SO_REUSEADDR
791: * socket options set. This heuristic avoids searching
792: * through all pcbs in the common case of a non-shared
793: * port. It assumes that an application will never
794: * clear these options after setting them.
795: */
796: if ((in6p->in6p_socket->so_options &
797: (SO_REUSEPORT|SO_REUSEADDR)) == 0)
798: break;
799: }
800:
801: #if 0
802: if (last == NULL) {
803: /*
804: * No matching pcb found; discard datagram.
805: * (No need to send an ICMP Port Unreachable
806: * for a broadcast or multicast datgram.)
807: */
808: switch (af) {
809: case AF_INET:
810: udpstat.udps_noportbcast++;
811: break;
812: case AF_INET6:
813: udp6stat.udp6s_noportmcast++;
814: break;
815: }
816: goto bad;
817: }
818: #endif
819: } else {
820: /*
821: * Locate pcb for datagram.
822: */
823: in6p = in6_pcblookup_connect(&udb6, src6, *sport,
824: dst6, *dport, 0);
825: if (in6p == 0) {
826: ++udpstat.udps_pcbhashmiss;
827: in6p = in6_pcblookup_bind(&udb6, dst6, *dport, 0);
828: if (in6p == 0) {
829: #if 0
830: struct mbuf *n;
831: n = m_copy(m, 0, M_COPYALL);
832: switch (af) {
833: case AF_INET:
834: if (m->m_flags & (M_BCAST | M_MCAST)) {
835: udpstat.udps_noportbcast++;
836: goto bad;
837: }
1.61 itojun 838: udpstat.udps_noport++;
1.53 itojun 839: if (n != NULL)
840: icmp_error(n, ICMP_UNREACH,
841: ICMP_UNREACH_PORT, 0, 0);
842: break;
843: case AF_INET6:
844: if (m->m_flags & M_MCAST) {
845: udp6stat.udp6s_noportmcast++;
846: goto bad;
847: }
1.61 itojun 848: udp6stat.udp6s_noport++;
1.53 itojun 849: if (n != NULL)
850: icmp6_error(n, ICMP6_DST_UNREACH,
851: ICMP6_DST_UNREACH_NOPORT, 0);
852: break;
853: }
854: #endif
855:
856: return rcvcnt;
857: }
858: }
859:
860: udp6_sendup(m, off, (struct sockaddr *)src, in6p->in6p_socket);
861: rcvcnt++;
862: }
863:
864: bad:
865: return rcvcnt;
866: }
867: #endif
868:
1.56 itojun 869: #else /*UDP6*/
870:
1.53 itojun 871: void
872: #if __STDC__
873: udp_input(struct mbuf *m, ...)
874: #else
875: udp_input(m, va_alist)
876: struct mbuf *m;
877: va_dcl
878: #endif
879: {
1.48 itojun 880: int proto;
1.66 augustss 881: struct ip *ip;
882: struct udphdr *uh;
883: struct inpcb *inp;
1.1 cgd 884: struct mbuf *opts = 0;
885: int len;
886: struct ip save_ip;
1.27 christos 887: int iphlen;
888: va_list ap;
1.34 mycroft 889: struct sockaddr_in udpsrc;
1.48 itojun 890: struct sockaddr *sa;
1.27 christos 891:
892: va_start(ap, m);
893: iphlen = va_arg(ap, int);
1.48 itojun 894: proto = va_arg(ap, int);
1.27 christos 895: va_end(ap);
1.1 cgd 896:
897: udpstat.udps_ipackets++;
898:
899: /*
900: * Strip IP options, if any; should skip this,
901: * make available to user, and use on returned packets,
902: * but we don't yet have a way to check the checksum
903: * with options still present.
904: */
905: if (iphlen > sizeof (struct ip)) {
906: ip_stripoptions(m, (struct mbuf *)0);
907: iphlen = sizeof(struct ip);
908: }
909:
910: /*
911: * Get IP and UDP header together in first mbuf.
912: */
913: ip = mtod(m, struct ip *);
914: if (m->m_len < iphlen + sizeof(struct udphdr)) {
915: if ((m = m_pullup(m, iphlen + sizeof(struct udphdr))) == 0) {
916: udpstat.udps_hdrops++;
917: return;
918: }
919: ip = mtod(m, struct ip *);
920: }
921: uh = (struct udphdr *)((caddr_t)ip + iphlen);
1.57 itojun 922:
923: /* destination port of 0 is illegal, based on RFC768. */
924: if (uh->uh_dport == 0)
925: goto bad;
1.1 cgd 926:
927: /*
928: * Make mbuf data length reflect UDP length.
929: * If not enough data to reflect UDP length, drop.
930: */
1.15 cgd 931: len = ntohs((u_int16_t)uh->uh_ulen);
1.47 mycroft 932: if (ip->ip_len != iphlen + len) {
1.66.4.1 sommerfe 933: if (ip->ip_len < iphlen + len || len < sizeof(struct udphdr)) {
1.1 cgd 934: udpstat.udps_badlen++;
935: goto bad;
936: }
1.47 mycroft 937: m_adj(m, iphlen + len - ip->ip_len);
1.1 cgd 938: }
939: /*
940: * Save a copy of the IP header in case we want restore it
941: * for sending an ICMP error message in response.
942: */
943: save_ip = *ip;
944:
945: /*
946: * Checksum extended UDP header and data.
947: */
1.29 mrg 948: if (uh->uh_sum) {
1.25 cgd 949: bzero(((struct ipovly *)ip)->ih_x1,
950: sizeof ((struct ipovly *)ip)->ih_x1);
1.1 cgd 951: ((struct ipovly *)ip)->ih_len = uh->uh_ulen;
1.46 mycroft 952: if (in_cksum(m, len + sizeof (struct ip)) != 0) {
1.1 cgd 953: udpstat.udps_badsum++;
954: m_freem(m);
955: return;
956: }
957: }
1.13 mycroft 958:
1.48 itojun 959: /*
960: * Construct sockaddr format source address.
961: */
962: udpsrc.sin_family = AF_INET;
963: udpsrc.sin_len = sizeof(struct sockaddr_in);
964: udpsrc.sin_addr = ip->ip_src;
965: udpsrc.sin_port = uh->uh_sport;
966: bzero((caddr_t)udpsrc.sin_zero, sizeof(udpsrc.sin_zero));
967:
1.16 mycroft 968: if (IN_MULTICAST(ip->ip_dst.s_addr) ||
1.13 mycroft 969: in_broadcast(ip->ip_dst, m->m_pkthdr.rcvif)) {
1.40 thorpej 970: struct inpcb *last;
1.4 hpeyerl 971: /*
972: * Deliver a multicast or broadcast datagram to *all* sockets
973: * for which the local and remote addresses and ports match
974: * those of the incoming datagram. This allows more than
975: * one process to receive multi/broadcasts on the same port.
976: * (This really ought to be done for unicast datagrams as
977: * well, but that would cause problems with existing
978: * applications that open both address-specific sockets and
979: * a wildcard socket listening to the same port -- they would
980: * end up receiving duplicates of every unicast datagram.
981: * Those applications open the multiple sockets to overcome an
982: * inadequacy of the UDP socket interface, but for backwards
983: * compatibility we avoid the problem here rather than
1.13 mycroft 984: * fixing the interface. Maybe 4.5BSD will remedy this?)
1.4 hpeyerl 985: */
1.13 mycroft 986:
1.48 itojun 987: iphlen += sizeof(struct udphdr);
1.4 hpeyerl 988: /*
1.48 itojun 989: * KAME note: usually we drop udpiphdr from mbuf here.
990: * we need udpiphdr for iPsec processing so we do that later.
1.4 hpeyerl 991: */
992: /*
993: * Locate pcb(s) for datagram.
994: * (Algorithm copied from raw_intr().)
995: */
996: last = NULL;
1.22 cgd 997: for (inp = udbtable.inpt_queue.cqh_first;
998: inp != (struct inpcb *)&udbtable.inpt_queue;
999: inp = inp->inp_queue.cqe_next) {
1.4 hpeyerl 1000: if (inp->inp_lport != uh->uh_dport)
1001: continue;
1.34 mycroft 1002: if (!in_nullhost(inp->inp_laddr)) {
1003: if (!in_hosteq(inp->inp_laddr, ip->ip_dst))
1.4 hpeyerl 1004: continue;
1005: }
1.34 mycroft 1006: if (!in_nullhost(inp->inp_faddr)) {
1007: if (!in_hosteq(inp->inp_faddr, ip->ip_src) ||
1.4 hpeyerl 1008: inp->inp_fport != uh->uh_sport)
1009: continue;
1010: }
1011:
1012: if (last != NULL) {
1013: struct mbuf *n;
1014:
1.48 itojun 1015: #ifdef IPSEC
1016: /* check AH/ESP integrity. */
1017: if (last != NULL && ipsec4_in_reject(m, last)) {
1018: ipsecstat.in_polvio++;
1019: /* do not inject data to pcb */
1020: } else
1021: #endif /*IPSEC*/
1.4 hpeyerl 1022: if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
1.40 thorpej 1023: if (last->inp_flags & INP_CONTROLOPTS
1024: || last->inp_socket->so_options &
1025: SO_TIMESTAMP) {
1026: ip_savecontrol(last, &opts,
1027: ip, n);
1028: }
1.49 drochner 1029: m_adj(n, iphlen);
1.48 itojun 1030: sa = (struct sockaddr *)&udpsrc;
1.40 thorpej 1031: if (sbappendaddr(
1032: &last->inp_socket->so_rcv,
1.48 itojun 1033: sa, n, opts) == 0) {
1.4 hpeyerl 1034: m_freem(n);
1.40 thorpej 1035: if (opts)
1036: m_freem(opts);
1.13 mycroft 1037: } else
1.40 thorpej 1038: sorwakeup(last->inp_socket);
1039: opts = 0;
1.4 hpeyerl 1040: }
1041: }
1.40 thorpej 1042: last = inp;
1.4 hpeyerl 1043: /*
1.13 mycroft 1044: * Don't look for additional matches if this one does
1045: * not have either the SO_REUSEPORT or SO_REUSEADDR
1046: * socket options set. This heuristic avoids searching
1047: * through all pcbs in the common case of a non-shared
1048: * port. It * assumes that an application will never
1049: * clear these options after setting them.
1.4 hpeyerl 1050: */
1.40 thorpej 1051: if ((last->inp_socket->so_options &
1052: (SO_REUSEPORT|SO_REUSEADDR)) == 0)
1.4 hpeyerl 1053: break;
1054: }
1.6 mycroft 1055:
1.4 hpeyerl 1056: if (last == NULL) {
1057: /*
1058: * No matching pcb found; discard datagram.
1059: * (No need to send an ICMP Port Unreachable
1060: * for a broadcast or multicast datgram.)
1061: */
1.13 mycroft 1062: udpstat.udps_noportbcast++;
1.4 hpeyerl 1063: goto bad;
1064: }
1.48 itojun 1065: #ifdef IPSEC
1066: /* check AH/ESP integrity. */
1067: if (last != NULL && ipsec4_in_reject(m, last)) {
1068: ipsecstat.in_polvio++;
1069: goto bad;
1070: }
1071: #endif /*IPSEC*/
1.40 thorpej 1072: if (last->inp_flags & INP_CONTROLOPTS ||
1073: last->inp_socket->so_options & SO_TIMESTAMP)
1074: ip_savecontrol(last, &opts, ip, m);
1.49 drochner 1075: m->m_len -= iphlen;
1076: m->m_pkthdr.len -= iphlen;
1077: m->m_data += iphlen;
1.48 itojun 1078: sa = (struct sockaddr *)&udpsrc;
1079: if (sbappendaddr(&last->inp_socket->so_rcv, sa, m, opts) == 0) {
1.13 mycroft 1080: udpstat.udps_fullsock++;
1.4 hpeyerl 1081: goto bad;
1.13 mycroft 1082: }
1.40 thorpej 1083: sorwakeup(last->inp_socket);
1.4 hpeyerl 1084: return;
1085: }
1.1 cgd 1086: /*
1087: * Locate pcb for datagram.
1088: */
1.35 mycroft 1089: inp = in_pcblookup_connect(&udbtable, ip->ip_src, uh->uh_sport,
1.26 mycroft 1090: ip->ip_dst, uh->uh_dport);
1091: if (inp == 0) {
1092: ++udpstat.udps_pcbhashmiss;
1.35 mycroft 1093: inp = in_pcblookup_bind(&udbtable, ip->ip_dst, uh->uh_dport);
1.18 mycroft 1094: if (inp == 0) {
1095: if (m->m_flags & (M_BCAST | M_MCAST)) {
1096: udpstat.udps_noportbcast++;
1097: goto bad;
1098: }
1.61 itojun 1099: udpstat.udps_noport++;
1.18 mycroft 1100: *ip = save_ip;
1.64 ws 1101: #ifdef IPKDB
1.38 ws 1102: if (checkipkdb(&ip->ip_src,
1103: uh->uh_sport,
1104: uh->uh_dport,
1105: m,
1106: iphlen + sizeof(struct udphdr),
1107: len - sizeof(struct udphdr)))
1.37 ws 1108: /* It was a debugger connect packet, just drop it now */
1109: goto bad;
1110: #endif
1.18 mycroft 1111: icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0);
1112: return;
1.13 mycroft 1113: }
1.1 cgd 1114: }
1.48 itojun 1115: #ifdef IPSEC
1116: if (inp != NULL && ipsec4_in_reject(m, inp)) {
1117: ipsecstat.in_polvio++;
1118: goto bad;
1119: }
1120: #endif /*IPSEC*/
1.1 cgd 1121:
1122: /*
1123: * Stuff source address and datagram in user buffer.
1124: */
1.40 thorpej 1125: if (inp->inp_flags & INP_CONTROLOPTS ||
1126: inp->inp_socket->so_options & SO_TIMESTAMP)
1127: ip_savecontrol(inp, &opts, ip, m);
1.1 cgd 1128: iphlen += sizeof(struct udphdr);
1129: m->m_len -= iphlen;
1130: m->m_pkthdr.len -= iphlen;
1131: m->m_data += iphlen;
1.48 itojun 1132: sa = (struct sockaddr *)&udpsrc;
1133: if (sbappendaddr(&inp->inp_socket->so_rcv, sa, m, opts) == 0) {
1.1 cgd 1134: udpstat.udps_fullsock++;
1135: goto bad;
1136: }
1137: sorwakeup(inp->inp_socket);
1138: return;
1139: bad:
1140: m_freem(m);
1141: if (opts)
1142: m_freem(opts);
1143: }
1.56 itojun 1144: #endif /*UDP6*/
1.1 cgd 1145:
1146: /*
1147: * Notify a udp user of an asynchronous error;
1148: * just wake up so that he can collect error status.
1149: */
1.7 mycroft 1150: static void
1.1 cgd 1151: udp_notify(inp, errno)
1.66 augustss 1152: struct inpcb *inp;
1.7 mycroft 1153: int errno;
1.1 cgd 1154: {
1.34 mycroft 1155:
1.1 cgd 1156: inp->inp_socket->so_error = errno;
1157: sorwakeup(inp->inp_socket);
1158: sowwakeup(inp->inp_socket);
1159: }
1160:
1.27 christos 1161: void *
1162: udp_ctlinput(cmd, sa, v)
1.1 cgd 1163: int cmd;
1164: struct sockaddr *sa;
1.27 christos 1165: void *v;
1.1 cgd 1166: {
1.66 augustss 1167: struct ip *ip = v;
1168: struct udphdr *uh;
1.18 mycroft 1169: void (*notify) __P((struct inpcb *, int)) = udp_notify;
1.21 mycroft 1170: int errno;
1.1 cgd 1171:
1.53 itojun 1172: if (sa->sa_family != AF_INET
1173: || sa->sa_len != sizeof(struct sockaddr_in))
1.51 itojun 1174: return NULL;
1.20 mycroft 1175: if ((unsigned)cmd >= PRC_NCMDS)
1.27 christos 1176: return NULL;
1.20 mycroft 1177: errno = inetctlerrmap[cmd];
1.18 mycroft 1178: if (PRC_IS_REDIRECT(cmd))
1.19 mycroft 1179: notify = in_rtchange, ip = 0;
1.18 mycroft 1180: else if (cmd == PRC_HOSTDEAD)
1.19 mycroft 1181: ip = 0;
1.23 cgd 1182: else if (errno == 0)
1.27 christos 1183: return NULL;
1.19 mycroft 1184: if (ip) {
1.1 cgd 1185: uh = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2));
1.34 mycroft 1186: in_pcbnotify(&udbtable, satosin(sa)->sin_addr, uh->uh_dport,
1187: ip->ip_src, uh->uh_sport, errno, notify);
1.53 itojun 1188:
1189: /* XXX mapped address case */
1.19 mycroft 1190: } else
1.34 mycroft 1191: in_pcbnotifyall(&udbtable, satosin(sa)->sin_addr, errno,
1192: notify);
1.27 christos 1193: return NULL;
1.1 cgd 1194: }
1195:
1.7 mycroft 1196: int
1.27 christos 1197: #if __STDC__
1198: udp_output(struct mbuf *m, ...)
1199: #else
1200: udp_output(m, va_alist)
1201: struct mbuf *m;
1202: va_dcl
1203: #endif
1204: {
1.66 augustss 1205: struct inpcb *inp;
1206: struct udpiphdr *ui;
1207: int len = m->m_pkthdr.len;
1.31 mycroft 1208: int error = 0;
1.27 christos 1209: va_list ap;
1210:
1211: va_start(ap, m);
1212: inp = va_arg(ap, struct inpcb *);
1213: va_end(ap);
1.1 cgd 1214:
1215: /*
1216: * Calculate data length and get a mbuf
1217: * for UDP and IP headers.
1218: */
1.13 mycroft 1219: M_PREPEND(m, sizeof(struct udpiphdr), M_DONTWAIT);
1220: if (m == 0) {
1221: error = ENOBUFS;
1.39 thorpej 1222: goto release;
1223: }
1224:
1225: /*
1226: * Compute the packet length of the IP header, and
1227: * punt if the length looks bogus.
1228: */
1229: if ((len + sizeof(struct udpiphdr)) > IP_MAXPACKET) {
1230: error = EMSGSIZE;
1.13 mycroft 1231: goto release;
1232: }
1.1 cgd 1233:
1234: /*
1235: * Fill in mbuf with extended UDP header
1236: * and addresses and length put into network format.
1237: */
1238: ui = mtod(m, struct udpiphdr *);
1.25 cgd 1239: bzero(ui->ui_x1, sizeof ui->ui_x1);
1.1 cgd 1240: ui->ui_pr = IPPROTO_UDP;
1.15 cgd 1241: ui->ui_len = htons((u_int16_t)len + sizeof (struct udphdr));
1.1 cgd 1242: ui->ui_src = inp->inp_laddr;
1243: ui->ui_dst = inp->inp_faddr;
1244: ui->ui_sport = inp->inp_lport;
1245: ui->ui_dport = inp->inp_fport;
1246: ui->ui_ulen = ui->ui_len;
1247:
1248: /*
1249: * Stuff checksum and output datagram.
1250: */
1251: ui->ui_sum = 0;
1252: if (udpcksum) {
1253: if ((ui->ui_sum = in_cksum(m, sizeof (struct udpiphdr) + len)) == 0)
1254: ui->ui_sum = 0xffff;
1255: }
1256: ((struct ip *)ui)->ip_len = sizeof (struct udpiphdr) + len;
1257: ((struct ip *)ui)->ip_ttl = inp->inp_ip.ip_ttl; /* XXX */
1258: ((struct ip *)ui)->ip_tos = inp->inp_ip.ip_tos; /* XXX */
1259: udpstat.udps_opackets++;
1.48 itojun 1260:
1261: #ifdef IPSEC
1.66.4.4 he 1262: if (ipsec_setsocket(m, inp->inp_socket) != 0) {
1263: error = ENOBUFS;
1264: goto release;
1265: }
1.48 itojun 1266: #endif /*IPSEC*/
1267:
1.31 mycroft 1268: return (ip_output(m, inp->inp_options, &inp->inp_route,
1.12 mycroft 1269: inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST),
1.31 mycroft 1270: inp->inp_moptions));
1.1 cgd 1271:
1272: release:
1273: m_freem(m);
1274: return (error);
1275: }
1276:
1.42 thorpej 1277: int udp_sendspace = 9216; /* really max datagram size */
1278: int udp_recvspace = 40 * (1024 + sizeof(struct sockaddr_in));
1.1 cgd 1279: /* 40 1K datagrams */
1280:
1281: /*ARGSUSED*/
1.7 mycroft 1282: int
1.31 mycroft 1283: udp_usrreq(so, req, m, nam, control, p)
1.1 cgd 1284: struct socket *so;
1285: int req;
1.31 mycroft 1286: struct mbuf *m, *nam, *control;
1.30 mycroft 1287: struct proc *p;
1.1 cgd 1288: {
1.66 augustss 1289: struct inpcb *inp;
1.1 cgd 1290: int s;
1.66 augustss 1291: int error = 0;
1.1 cgd 1292:
1293: if (req == PRU_CONTROL)
1.31 mycroft 1294: return (in_control(so, (long)m, (caddr_t)nam,
1.30 mycroft 1295: (struct ifnet *)control, p));
1.59 thorpej 1296:
1.60 thorpej 1297: if (req == PRU_PURGEIF) {
1298: in_purgeif((struct ifnet *)control);
1299: in_pcbpurgeif(&udbtable, (struct ifnet *)control);
1.59 thorpej 1300: return (0);
1301: }
1.31 mycroft 1302:
1303: s = splsoftnet();
1304: inp = sotoinpcb(so);
1.32 mycroft 1305: #ifdef DIAGNOSTIC
1306: if (req != PRU_SEND && req != PRU_SENDOOB && control)
1307: panic("udp_usrreq: unexpected control mbuf");
1308: #endif
1.31 mycroft 1309: if (inp == 0 && req != PRU_ATTACH) {
1310: error = EINVAL;
1311: goto release;
1312: }
1313:
1.1 cgd 1314: /*
1315: * Note: need to block udp_input while changing
1316: * the udp pcb queue and/or pcb addresses.
1317: */
1318: switch (req) {
1319:
1320: case PRU_ATTACH:
1.31 mycroft 1321: if (inp != 0) {
1322: error = EISCONN;
1.1 cgd 1323: break;
1324: }
1.31 mycroft 1325: if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
1326: error = soreserve(so, udp_sendspace, udp_recvspace);
1327: if (error)
1328: break;
1329: }
1.18 mycroft 1330: error = in_pcballoc(so, &udbtable);
1.1 cgd 1331: if (error)
1332: break;
1.31 mycroft 1333: inp = sotoinpcb(so);
1334: inp->inp_ip.ip_ttl = ip_defttl;
1.48 itojun 1335: #ifdef IPSEC
1.58 itojun 1336: error = ipsec_init_policy(so, &inp->inp_sp);
1.53 itojun 1337: if (error != 0) {
1.52 itojun 1338: in_pcbdetach(inp);
1.53 itojun 1339: break;
1340: }
1.48 itojun 1341: #endif /*IPSEC*/
1.1 cgd 1342: break;
1343:
1344: case PRU_DETACH:
1.31 mycroft 1345: in_pcbdetach(inp);
1.1 cgd 1346: break;
1347:
1348: case PRU_BIND:
1.31 mycroft 1349: error = in_pcbbind(inp, nam, p);
1.1 cgd 1350: break;
1351:
1352: case PRU_LISTEN:
1353: error = EOPNOTSUPP;
1354: break;
1355:
1356: case PRU_CONNECT:
1.31 mycroft 1357: error = in_pcbconnect(inp, nam);
1358: if (error)
1.1 cgd 1359: break;
1.31 mycroft 1360: soisconnected(so);
1.1 cgd 1361: break;
1362:
1363: case PRU_CONNECT2:
1364: error = EOPNOTSUPP;
1365: break;
1366:
1367: case PRU_DISCONNECT:
1.31 mycroft 1368: /*soisdisconnected(so);*/
1369: so->so_state &= ~SS_ISCONNECTED; /* XXX */
1.1 cgd 1370: in_pcbdisconnect(inp);
1.34 mycroft 1371: inp->inp_laddr = zeroin_addr; /* XXX */
1.35 mycroft 1372: in_pcbstate(inp, INP_BOUND); /* XXX */
1.1 cgd 1373: break;
1374:
1375: case PRU_SHUTDOWN:
1376: socantsendmore(so);
1377: break;
1378:
1.31 mycroft 1379: case PRU_RCVD:
1380: error = EOPNOTSUPP;
1.1 cgd 1381: break;
1382:
1.31 mycroft 1383: case PRU_SEND:
1.32 mycroft 1384: if (control && control->m_len) {
1385: m_freem(control);
1386: m_freem(m);
1387: error = EINVAL;
1388: break;
1389: }
1.31 mycroft 1390: {
1.35 mycroft 1391: struct in_addr laddr; /* XXX */
1.1 cgd 1392:
1.31 mycroft 1393: if (nam) {
1.35 mycroft 1394: laddr = inp->inp_laddr; /* XXX */
1.31 mycroft 1395: if ((so->so_state & SS_ISCONNECTED) != 0) {
1396: error = EISCONN;
1.32 mycroft 1397: goto die;
1.31 mycroft 1398: }
1399: error = in_pcbconnect(inp, nam);
1.32 mycroft 1400: if (error) {
1401: die:
1402: m_freem(m);
1.31 mycroft 1403: break;
1.32 mycroft 1404: }
1.31 mycroft 1405: } else {
1406: if ((so->so_state & SS_ISCONNECTED) == 0) {
1407: error = ENOTCONN;
1.32 mycroft 1408: goto die;
1.31 mycroft 1409: }
1410: }
1.33 mycroft 1411: error = udp_output(m, inp);
1.31 mycroft 1412: if (nam) {
1413: in_pcbdisconnect(inp);
1.35 mycroft 1414: inp->inp_laddr = laddr; /* XXX */
1415: in_pcbstate(inp, INP_BOUND); /* XXX */
1.31 mycroft 1416: }
1417: }
1.1 cgd 1418: break;
1419:
1420: case PRU_SENSE:
1421: /*
1422: * stat: don't bother with a blocksize.
1423: */
1.31 mycroft 1424: splx(s);
1.1 cgd 1425: return (0);
1426:
1.31 mycroft 1427: case PRU_RCVOOB:
1428: error = EOPNOTSUPP;
1429: break;
1430:
1.1 cgd 1431: case PRU_SENDOOB:
1.32 mycroft 1432: m_freem(control);
1.31 mycroft 1433: m_freem(m);
1.1 cgd 1434: error = EOPNOTSUPP;
1435: break;
1436:
1.31 mycroft 1437: case PRU_SOCKADDR:
1438: in_setsockaddr(inp, nam);
1439: break;
1440:
1441: case PRU_PEERADDR:
1442: in_setpeeraddr(inp, nam);
1443: break;
1.1 cgd 1444:
1445: default:
1446: panic("udp_usrreq");
1447: }
1448:
1449: release:
1.31 mycroft 1450: splx(s);
1.1 cgd 1451: return (error);
1.13 mycroft 1452: }
1453:
1454: /*
1455: * Sysctl for udp variables.
1456: */
1.27 christos 1457: int
1.13 mycroft 1458: udp_sysctl(name, namelen, oldp, oldlenp, newp, newlen)
1459: int *name;
1460: u_int namelen;
1461: void *oldp;
1462: size_t *oldlenp;
1463: void *newp;
1464: size_t newlen;
1465: {
1466: /* All sysctl names at this level are terminal. */
1467: if (namelen != 1)
1468: return (ENOTDIR);
1469:
1470: switch (name[0]) {
1471: case UDPCTL_CHECKSUM:
1472: return (sysctl_int(oldp, oldlenp, newp, newlen, &udpcksum));
1.42 thorpej 1473: case UDPCTL_SENDSPACE:
1474: return (sysctl_int(oldp, oldlenp, newp, newlen,
1475: &udp_sendspace));
1476: case UDPCTL_RECVSPACE:
1477: return (sysctl_int(oldp, oldlenp, newp, newlen,
1478: &udp_recvspace));
1.13 mycroft 1479: default:
1480: return (ENOPROTOOPT);
1481: }
1482: /* NOTREACHED */
1.1 cgd 1483: }
CVSweb <webmaster@jp.NetBSD.org>
![[BACK]](/icons/back.gif){kind=icon}
Return to udp_usrreq.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [cvs.NetBSD.org] / src / sys / netinet