Annotation of src/sys/netinet/udp_usrreq.c, Revision 1.82
1.82 ! itojun 1: /* $NetBSD: udp_usrreq.c,v 1.81 2001/07/17 02:44:00 enami 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:
1.77 soda 67: #include "opt_inet.h"
1.50 thorpej 68: #include "opt_ipsec.h"
1.78 thorpej 69: #include "opt_inet_csum.h"
1.64 ws 70: #include "opt_ipkdb.h"
1.1 cgd 71:
1.5 mycroft 72: #include <sys/param.h>
73: #include <sys/malloc.h>
74: #include <sys/mbuf.h>
75: #include <sys/protosw.h>
76: #include <sys/socket.h>
77: #include <sys/socketvar.h>
1.13 mycroft 78: #include <sys/errno.h>
1.5 mycroft 79: #include <sys/stat.h>
1.27 christos 80: #include <sys/systm.h>
81: #include <sys/proc.h>
1.53 itojun 82: #include <sys/domain.h>
1.27 christos 83:
1.67 mrg 84: #include <uvm/uvm_extern.h>
1.27 christos 85: #include <sys/sysctl.h>
1.1 cgd 86:
1.5 mycroft 87: #include <net/if.h>
88: #include <net/route.h>
1.1 cgd 89:
1.5 mycroft 90: #include <netinet/in.h>
91: #include <netinet/in_systm.h>
1.15 cgd 92: #include <netinet/in_var.h>
1.5 mycroft 93: #include <netinet/ip.h>
94: #include <netinet/in_pcb.h>
95: #include <netinet/ip_var.h>
96: #include <netinet/ip_icmp.h>
97: #include <netinet/udp.h>
98: #include <netinet/udp_var.h>
1.1 cgd 99:
1.53 itojun 100: #ifdef INET6
101: #include <netinet/ip6.h>
102: #include <netinet/icmp6.h>
103: #include <netinet6/ip6_var.h>
104: #include <netinet6/in6_pcb.h>
105: #include <netinet6/udp6_var.h>
106: #endif
107:
108: #ifdef PULLDOWN_TEST
109: #ifndef INET6
110: /* always need ip6.h for IP6_EXTHDR_GET */
111: #include <netinet/ip6.h>
112: #endif
113: #endif
114:
1.76 itojun 115: #include "faith.h"
116: #if defined(NFAITH) && NFAITH > 0
117: #include <net/if_faith.h>
118: #endif
119:
1.27 christos 120: #include <machine/stdarg.h>
121:
1.48 itojun 122: #ifdef IPSEC
123: #include <netinet6/ipsec.h>
124: #include <netkey/key.h>
125: #endif /*IPSEC*/
126:
1.64 ws 127: #ifdef IPKDB
128: #include <ipkdb/ipkdb.h>
129: #endif
130:
1.8 mycroft 131: /*
132: * UDP protocol implementation.
133: * Per RFC 768, August, 1980.
134: */
135: #ifndef COMPAT_42
136: int udpcksum = 1;
137: #else
138: int udpcksum = 0; /* XXX */
139: #endif
140:
1.72 itojun 141: #ifdef INET
1.53 itojun 142: static void udp4_sendup __P((struct mbuf *, int, struct sockaddr *,
143: struct socket *));
144: static int udp4_realinput __P((struct sockaddr_in *, struct sockaddr_in *,
145: struct mbuf *, int));
1.72 itojun 146: #endif
1.53 itojun 147: #ifdef INET6
148: static void udp6_sendup __P((struct mbuf *, int, struct sockaddr *,
149: struct socket *));
150: static int in6_mcmatch __P((struct in6pcb *, struct in6_addr *,
151: struct ifnet *));
152: static int udp6_realinput __P((int, struct sockaddr_in6 *,
153: struct sockaddr_in6 *, struct mbuf *, int));
154: #endif
1.72 itojun 155: #ifdef INET
1.13 mycroft 156: static void udp_notify __P((struct inpcb *, int));
1.72 itojun 157: #endif
1.7 mycroft 158:
1.26 mycroft 159: #ifndef UDBHASHSIZE
160: #define UDBHASHSIZE 128
161: #endif
162: int udbhashsize = UDBHASHSIZE;
163:
1.78 thorpej 164: #ifdef UDP_CSUM_COUNTERS
165: #include <sys/device.h>
166:
167: struct evcnt udp_hwcsum_bad = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
168: NULL, "udp", "hwcsum bad");
169: struct evcnt udp_hwcsum_ok = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
170: NULL, "udp", "hwcsum ok");
171: struct evcnt udp_hwcsum_data = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
172: NULL, "udp", "hwcsum data");
173: struct evcnt udp_swcsum = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
174: NULL, "udp", "swcsum");
175:
176: #define UDP_CSUM_COUNTER_INCR(ev) (ev)->ev_count++
177:
178: #else
179:
180: #define UDP_CSUM_COUNTER_INCR(ev) /* nothing */
181:
182: #endif /* UDP_CSUM_COUNTERS */
183:
1.7 mycroft 184: void
1.1 cgd 185: udp_init()
186: {
1.18 mycroft 187:
1.72 itojun 188: #ifdef INET
1.35 mycroft 189: in_pcbinit(&udbtable, udbhashsize, udbhashsize);
1.72 itojun 190: #endif
1.78 thorpej 191:
192: #ifdef UDP_CSUM_COUNTERS
193: evcnt_attach_static(&udp_hwcsum_bad);
194: evcnt_attach_static(&udp_hwcsum_ok);
195: evcnt_attach_static(&udp_hwcsum_data);
196: evcnt_attach_static(&udp_swcsum);
197: #endif /* UDP_CSUM_COUNTERS */
1.1 cgd 198: }
199:
1.56 itojun 200: #ifndef UDP6
1.72 itojun 201: #ifdef INET
1.7 mycroft 202: void
1.27 christos 203: #if __STDC__
204: udp_input(struct mbuf *m, ...)
205: #else
206: udp_input(m, va_alist)
207: struct mbuf *m;
208: va_dcl
209: #endif
1.1 cgd 210: {
1.53 itojun 211: va_list ap;
212: struct sockaddr_in src, dst;
213: struct ip *ip;
214: struct udphdr *uh;
215: int iphlen, proto;
216: int len;
217: int n;
218:
219: va_start(ap, m);
220: iphlen = va_arg(ap, int);
221: proto = va_arg(ap, int);
222: va_end(ap);
223:
224: udpstat.udps_ipackets++;
225:
226: #ifndef PULLDOWN_TEST
227: /*
228: * Strip IP options, if any; should skip this,
229: * make available to user, and use on returned packets,
230: * but we don't yet have a way to check the checksum
231: * with options still present.
232: */
233: if (iphlen > sizeof (struct ip)) {
234: ip_stripoptions(m, (struct mbuf *)0);
235: iphlen = sizeof(struct ip);
236: }
237: #else
238: /*
239: * we may enable the above code if we save and pass IPv4 options
240: * to the userland.
241: */
242: #endif
243:
244: /*
245: * Get IP and UDP header together in first mbuf.
246: */
247: ip = mtod(m, struct ip *);
248: #ifndef PULLDOWN_TEST
249: if (m->m_len < iphlen + sizeof(struct udphdr)) {
250: if ((m = m_pullup(m, iphlen + sizeof(struct udphdr))) == 0) {
251: udpstat.udps_hdrops++;
252: return;
253: }
254: ip = mtod(m, struct ip *);
255: }
256: uh = (struct udphdr *)((caddr_t)ip + iphlen);
257: #else
258: IP6_EXTHDR_GET(uh, struct udphdr *, m, iphlen, sizeof(struct udphdr));
259: if (uh == NULL) {
260: udpstat.udps_hdrops++;
261: return;
262: }
263: #endif
264:
1.57 itojun 265: /* destination port of 0 is illegal, based on RFC768. */
266: if (uh->uh_dport == 0)
267: goto bad;
268:
1.53 itojun 269: /*
270: * Make mbuf data length reflect UDP length.
271: * If not enough data to reflect UDP length, drop.
272: */
273: len = ntohs((u_int16_t)uh->uh_ulen);
274: if (ip->ip_len != iphlen + len) {
1.70 sommerfe 275: if (ip->ip_len < iphlen + len || len < sizeof(struct udphdr)) {
1.53 itojun 276: udpstat.udps_badlen++;
277: goto bad;
278: }
279: m_adj(m, iphlen + len - ip->ip_len);
280: }
281:
282: /*
283: * Checksum extended UDP header and data.
284: */
285: if (uh->uh_sum) {
1.78 thorpej 286: switch (m->m_pkthdr.csum_flags &
287: ((m->m_pkthdr.rcvif->if_csum_flags & M_CSUM_UDPv4) |
288: M_CSUM_TCP_UDP_BAD | M_CSUM_DATA)) {
289: case M_CSUM_UDPv4|M_CSUM_TCP_UDP_BAD:
290: UDP_CSUM_COUNTER_INCR(&udp_hwcsum_bad);
291: goto badcsum;
292:
293: case M_CSUM_UDPv4|M_CSUM_DATA:
294: UDP_CSUM_COUNTER_INCR(&udp_hwcsum_data);
295: if ((m->m_pkthdr.csum_data ^ 0xffff) != 0)
296: goto badcsum;
297: break;
298:
299: case M_CSUM_UDPv4:
300: /* Checksum was okay. */
301: UDP_CSUM_COUNTER_INCR(&udp_hwcsum_ok);
302: break;
303:
304: default:
305: /* Need to compute it ourselves. */
306: UDP_CSUM_COUNTER_INCR(&udp_swcsum);
307: if (in4_cksum(m, IPPROTO_UDP, iphlen, len) != 0)
308: goto badcsum;
309: break;
1.53 itojun 310: }
311: }
312:
313: /* construct source and dst sockaddrs. */
314: bzero(&src, sizeof(src));
315: src.sin_family = AF_INET;
316: src.sin_len = sizeof(struct sockaddr_in);
317: bcopy(&ip->ip_src, &src.sin_addr, sizeof(src.sin_addr));
318: src.sin_port = uh->uh_sport;
319: bzero(&dst, sizeof(dst));
320: dst.sin_family = AF_INET;
321: dst.sin_len = sizeof(struct sockaddr_in);
322: bcopy(&ip->ip_dst, &dst.sin_addr, sizeof(dst.sin_addr));
323: dst.sin_port = uh->uh_dport;
324:
325: n = udp4_realinput(&src, &dst, m, iphlen);
326: #ifdef INET6
327: if (IN_MULTICAST(ip->ip_dst.s_addr) || n == 0) {
328: struct sockaddr_in6 src6, dst6;
329:
330: bzero(&src6, sizeof(src6));
331: src6.sin6_family = AF_INET6;
332: src6.sin6_len = sizeof(struct sockaddr_in6);
333: src6.sin6_addr.s6_addr[10] = src6.sin6_addr.s6_addr[11] = 0xff;
334: bcopy(&ip->ip_src, &src6.sin6_addr.s6_addr[12],
335: sizeof(ip->ip_src));
336: src6.sin6_port = uh->uh_sport;
337: bzero(&dst6, sizeof(dst6));
338: dst6.sin6_family = AF_INET6;
339: dst6.sin6_len = sizeof(struct sockaddr_in6);
340: dst6.sin6_addr.s6_addr[10] = dst6.sin6_addr.s6_addr[11] = 0xff;
341: bcopy(&ip->ip_dst, &dst6.sin6_addr.s6_addr[12],
342: sizeof(ip->ip_dst));
343: dst6.sin6_port = uh->uh_dport;
344:
345: n += udp6_realinput(AF_INET, &src6, &dst6, m, iphlen);
346: }
347: #endif
348:
349: if (n == 0) {
350: if (m->m_flags & (M_BCAST | M_MCAST)) {
351: udpstat.udps_noportbcast++;
352: goto bad;
353: }
1.61 itojun 354: udpstat.udps_noport++;
1.64 ws 355: #ifdef IPKDB
1.53 itojun 356: if (checkipkdb(&ip->ip_src, uh->uh_sport, uh->uh_dport,
357: m, iphlen + sizeof(struct udphdr),
358: m->m_pkthdr.len - iphlen - sizeof(struct udphdr))) {
359: /*
360: * It was a debugger connect packet,
361: * just drop it now
362: */
363: goto bad;
364: }
365: #endif
366: icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0);
367: m = NULL;
368: }
369:
370: bad:
371: if (m)
372: m_freem(m);
1.78 thorpej 373: return;
374:
375: badcsum:
376: m_freem(m);
377: udpstat.udps_badsum++;
1.53 itojun 378: }
1.72 itojun 379: #endif
1.53 itojun 380:
381: #ifdef INET6
382: int
383: udp6_input(mp, offp, proto)
384: struct mbuf **mp;
385: int *offp, proto;
386: {
387: struct mbuf *m = *mp;
388: int off = *offp;
389: struct sockaddr_in6 src, dst;
390: struct ip6_hdr *ip6;
391: struct udphdr *uh;
392: u_int32_t plen, ulen;
393:
1.76 itojun 394: #ifndef PULLDOWN_TEST
395: IP6_EXTHDR_CHECK(m, off, sizeof(struct udphdr), IPPROTO_DONE);
396: #endif
397: ip6 = mtod(m, struct ip6_hdr *);
398:
1.53 itojun 399: #if defined(NFAITH) && 0 < NFAITH
1.76 itojun 400: if (faithprefix(&ip6->ip6_dst)) {
401: /* send icmp6 host unreach? */
402: m_freem(m);
403: return IPPROTO_DONE;
1.53 itojun 404: }
405: #endif
406:
407: udp6stat.udp6s_ipackets++;
408:
409: /* check for jumbogram is done in ip6_input. we can trust pkthdr.len */
410: plen = m->m_pkthdr.len - off;
411: #ifndef PULLDOWN_TEST
412: uh = (struct udphdr *)((caddr_t)ip6 + off);
413: #else
414: IP6_EXTHDR_GET(uh, struct udphdr *, m, off, sizeof(struct udphdr));
415: if (uh == NULL) {
416: ip6stat.ip6s_tooshort++;
417: return IPPROTO_DONE;
418: }
419: #endif
420: ulen = ntohs((u_short)uh->uh_ulen);
1.69 itojun 421: /*
422: * RFC2675 section 4: jumbograms will have 0 in the UDP header field,
423: * iff payload length > 0xffff.
424: */
1.53 itojun 425: if (ulen == 0 && plen > 0xffff)
426: ulen = plen;
427:
428: if (plen != ulen) {
429: udp6stat.udp6s_badlen++;
1.54 itojun 430: goto bad;
431: }
432:
1.57 itojun 433: /* destination port of 0 is illegal, based on RFC768. */
434: if (uh->uh_dport == 0)
435: goto bad;
436:
1.54 itojun 437: /* Be proactive about malicious use of IPv4 mapped address */
438: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
439: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
440: /* XXX stat */
1.53 itojun 441: goto bad;
442: }
443:
444: /*
445: * Checksum extended UDP header and data.
446: */
447: if (uh->uh_sum == 0)
448: udp6stat.udp6s_nosum++;
449: else if (in6_cksum(m, IPPROTO_UDP, off, ulen) != 0) {
450: udp6stat.udp6s_badsum++;
451: goto bad;
452: }
453:
454: /*
455: * Construct source and dst sockaddrs.
456: * Note that ifindex (s6_addr16[1]) is already filled.
457: */
458: bzero(&src, sizeof(src));
459: src.sin6_family = AF_INET6;
460: src.sin6_len = sizeof(struct sockaddr_in6);
1.69 itojun 461: /* KAME hack: recover scopeid */
462: (void)in6_recoverscope(&src, &ip6->ip6_src, m->m_pkthdr.rcvif);
1.53 itojun 463: src.sin6_port = uh->uh_sport;
464: bzero(&dst, sizeof(dst));
465: dst.sin6_family = AF_INET6;
466: dst.sin6_len = sizeof(struct sockaddr_in6);
1.69 itojun 467: /* KAME hack: recover scopeid */
468: (void)in6_recoverscope(&dst, &ip6->ip6_dst, m->m_pkthdr.rcvif);
1.53 itojun 469: dst.sin6_port = uh->uh_dport;
470:
471: if (udp6_realinput(AF_INET6, &src, &dst, m, off) == 0) {
472: if (m->m_flags & M_MCAST) {
473: udp6stat.udp6s_noportmcast++;
474: goto bad;
475: }
1.61 itojun 476: udp6stat.udp6s_noport++;
1.53 itojun 477: icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0);
478: m = NULL;
479: }
480:
481: bad:
482: if (m)
483: m_freem(m);
484: return IPPROTO_DONE;
485: }
486: #endif
487:
1.72 itojun 488: #ifdef INET
1.53 itojun 489: static void
490: udp4_sendup(m, off, src, so)
491: struct mbuf *m;
492: int off; /* offset of data portion */
493: struct sockaddr *src;
494: struct socket *so;
495: {
496: struct mbuf *opts = NULL;
497: struct mbuf *n;
498: struct inpcb *inp = NULL;
499: #ifdef INET6
500: struct in6pcb *in6p = NULL;
501: #endif
502:
503: if (!so)
504: return;
505: switch (so->so_proto->pr_domain->dom_family) {
506: case AF_INET:
507: inp = sotoinpcb(so);
508: break;
509: #ifdef INET6
510: case AF_INET6:
511: in6p = sotoin6pcb(so);
512: break;
513: #endif
514: default:
515: return;
516: }
517:
518: #ifdef IPSEC
519: /* check AH/ESP integrity. */
520: if (so != NULL && ipsec4_in_reject_so(m, so)) {
521: ipsecstat.in_polvio++;
522: return;
523: }
524: #endif /*IPSEC*/
525:
526: if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
527: if (inp && (inp->inp_flags & INP_CONTROLOPTS
528: || so->so_options & SO_TIMESTAMP)) {
529: struct ip *ip = mtod(n, struct ip *);
530: ip_savecontrol(inp, &opts, ip, n);
531: }
532:
533: m_adj(n, off);
534: if (sbappendaddr(&so->so_rcv, src, n,
535: opts) == 0) {
536: m_freem(n);
537: if (opts)
538: m_freem(opts);
1.81 enami 539: udpstat.udps_fullsock++;
1.53 itojun 540: } else
541: sorwakeup(so);
542: }
543: }
1.72 itojun 544: #endif
1.53 itojun 545:
546: #ifdef INET6
547: static void
548: udp6_sendup(m, off, src, so)
549: struct mbuf *m;
550: int off; /* offset of data portion */
551: struct sockaddr *src;
552: struct socket *so;
553: {
554: struct mbuf *opts = NULL;
555: struct mbuf *n;
556: struct in6pcb *in6p = NULL;
557:
558: if (!so)
559: return;
560: if (so->so_proto->pr_domain->dom_family != AF_INET6)
561: return;
562: in6p = sotoin6pcb(so);
563:
564: #ifdef IPSEC
565: /* check AH/ESP integrity. */
566: if (so != NULL && ipsec6_in_reject_so(m, so)) {
567: ipsec6stat.in_polvio++;
568: return;
569: }
570: #endif /*IPSEC*/
571:
572: if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
573: if (in6p && (in6p->in6p_flags & IN6P_CONTROLOPTS
574: || in6p->in6p_socket->so_options & SO_TIMESTAMP)) {
575: struct ip6_hdr *ip6 = mtod(n, struct ip6_hdr *);
576: ip6_savecontrol(in6p, &opts, ip6, n);
577: }
578:
579: m_adj(n, off);
580: if (sbappendaddr(&so->so_rcv, src, n, opts) == 0) {
581: m_freem(n);
582: if (opts)
583: m_freem(opts);
584: udp6stat.udp6s_fullsock++;
585: } else
586: sorwakeup(so);
587: }
588: }
589: #endif
590:
1.72 itojun 591: #ifdef INET
1.53 itojun 592: static int
593: udp4_realinput(src, dst, m, off)
594: struct sockaddr_in *src;
595: struct sockaddr_in *dst;
596: struct mbuf *m;
597: int off; /* offset of udphdr */
598: {
599: u_int16_t *sport, *dport;
600: int rcvcnt;
601: struct in_addr *src4, *dst4;
602: struct inpcb *inp;
603:
604: rcvcnt = 0;
605: off += sizeof(struct udphdr); /* now, offset of payload */
606:
607: if (src->sin_family != AF_INET || dst->sin_family != AF_INET)
608: goto bad;
609:
610: src4 = &src->sin_addr;
611: sport = &src->sin_port;
612: dst4 = &dst->sin_addr;
613: dport = &dst->sin_port;
614:
1.73 itojun 615: if (IN_MULTICAST(dst4->s_addr) ||
1.53 itojun 616: in_broadcast(*dst4, m->m_pkthdr.rcvif)) {
617: struct inpcb *last;
618: /*
619: * Deliver a multicast or broadcast datagram to *all* sockets
620: * for which the local and remote addresses and ports match
621: * those of the incoming datagram. This allows more than
622: * one process to receive multi/broadcasts on the same port.
623: * (This really ought to be done for unicast datagrams as
624: * well, but that would cause problems with existing
625: * applications that open both address-specific sockets and
626: * a wildcard socket listening to the same port -- they would
627: * end up receiving duplicates of every unicast datagram.
628: * Those applications open the multiple sockets to overcome an
629: * inadequacy of the UDP socket interface, but for backwards
630: * compatibility we avoid the problem here rather than
631: * fixing the interface. Maybe 4.5BSD will remedy this?)
632: */
633:
634: /*
635: * KAME note: usually we drop udpiphdr from mbuf here.
1.71 itojun 636: * we need udpiphdr for IPsec processing so we do that later.
1.53 itojun 637: */
638: /*
639: * Locate pcb(s) for datagram.
640: */
641: for (inp = udbtable.inpt_queue.cqh_first;
642: inp != (struct inpcb *)&udbtable.inpt_queue;
643: inp = inp->inp_queue.cqe_next) {
644: if (inp->inp_lport != *dport)
645: continue;
646: if (!in_nullhost(inp->inp_laddr)) {
647: if (!in_hosteq(inp->inp_laddr, *dst4))
648: continue;
649: }
650: if (!in_nullhost(inp->inp_faddr)) {
651: if (!in_hosteq(inp->inp_faddr, *src4) ||
652: inp->inp_fport != *sport)
653: continue;
654: }
655:
656: last = inp;
657: udp4_sendup(m, off, (struct sockaddr *)src,
658: inp->inp_socket);
659: rcvcnt++;
660:
661: /*
662: * Don't look for additional matches if this one does
663: * not have either the SO_REUSEPORT or SO_REUSEADDR
664: * socket options set. This heuristic avoids searching
665: * through all pcbs in the common case of a non-shared
666: * port. It assumes that an application will never
667: * clear these options after setting them.
668: */
669: if ((inp->inp_socket->so_options &
670: (SO_REUSEPORT|SO_REUSEADDR)) == 0)
671: break;
672: }
673: } else {
674: /*
675: * Locate pcb for datagram.
676: */
677: inp = in_pcblookup_connect(&udbtable, *src4, *sport, *dst4, *dport);
678: if (inp == 0) {
679: ++udpstat.udps_pcbhashmiss;
680: inp = in_pcblookup_bind(&udbtable, *dst4, *dport);
1.82 ! itojun 681: if (inp == 0)
1.53 itojun 682: return rcvcnt;
683: }
684:
685: udp4_sendup(m, off, (struct sockaddr *)src, inp->inp_socket);
686: rcvcnt++;
687: }
688:
689: bad:
690: return rcvcnt;
691: }
1.72 itojun 692: #endif
1.53 itojun 693:
694: #ifdef INET6
695: static int
696: in6_mcmatch(in6p, ia6, ifp)
697: struct in6pcb *in6p;
1.66 augustss 698: struct in6_addr *ia6;
1.53 itojun 699: struct ifnet *ifp;
700: {
701: struct ip6_moptions *im6o = in6p->in6p_moptions;
702: struct in6_multi_mship *imm;
703:
704: if (im6o == NULL)
705: return 0;
706:
707: for (imm = im6o->im6o_memberships.lh_first; imm != NULL;
708: imm = imm->i6mm_chain.le_next) {
709: if ((ifp == NULL ||
710: imm->i6mm_maddr->in6m_ifp == ifp) &&
711: IN6_ARE_ADDR_EQUAL(&imm->i6mm_maddr->in6m_addr,
712: ia6))
713: return 1;
714: }
715: return 0;
716: }
717:
718: static int
719: udp6_realinput(af, src, dst, m, off)
720: int af; /* af on packet */
721: struct sockaddr_in6 *src;
722: struct sockaddr_in6 *dst;
723: struct mbuf *m;
724: int off; /* offset of udphdr */
725: {
1.79 itojun 726: u_int16_t sport, dport;
1.53 itojun 727: int rcvcnt;
1.79 itojun 728: struct in6_addr src6, dst6;
729: const struct in_addr *dst4;
1.53 itojun 730: struct in6pcb *in6p;
731:
732: rcvcnt = 0;
733: off += sizeof(struct udphdr); /* now, offset of payload */
734:
735: if (af != AF_INET && af != AF_INET6)
736: goto bad;
737: if (src->sin6_family != AF_INET6 || dst->sin6_family != AF_INET6)
738: goto bad;
739:
1.79 itojun 740: in6_embedscope(&src6, src, NULL, NULL);
741: sport = src->sin6_port;
742: in6_embedscope(&dst6, dst, NULL, NULL);
743: dport = dst->sin6_port;
1.74 itojun 744: dst4 = (struct in_addr *)&dst->sin6_addr.s6_addr32[12];
1.53 itojun 745:
1.79 itojun 746: if (IN6_IS_ADDR_MULTICAST(&dst6) ||
747: (af == AF_INET && IN_MULTICAST(dst4->s_addr))) {
1.53 itojun 748: struct in6pcb *last;
749: /*
750: * Deliver a multicast or broadcast datagram to *all* sockets
751: * for which the local and remote addresses and ports match
752: * those of the incoming datagram. This allows more than
753: * one process to receive multi/broadcasts on the same port.
754: * (This really ought to be done for unicast datagrams as
755: * well, but that would cause problems with existing
756: * applications that open both address-specific sockets and
757: * a wildcard socket listening to the same port -- they would
758: * end up receiving duplicates of every unicast datagram.
759: * Those applications open the multiple sockets to overcome an
760: * inadequacy of the UDP socket interface, but for backwards
761: * compatibility we avoid the problem here rather than
762: * fixing the interface. Maybe 4.5BSD will remedy this?)
763: */
764:
765: /*
766: * KAME note: usually we drop udpiphdr from mbuf here.
1.71 itojun 767: * we need udpiphdr for IPsec processing so we do that later.
1.53 itojun 768: */
769: /*
770: * Locate pcb(s) for datagram.
771: */
772: for (in6p = udb6.in6p_next; in6p != &udb6;
773: in6p = in6p->in6p_next) {
1.79 itojun 774: if (in6p->in6p_lport != dport)
1.53 itojun 775: continue;
776: if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) {
1.79 itojun 777: if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &dst6) &&
778: !in6_mcmatch(in6p, &dst6, m->m_pkthdr.rcvif))
1.53 itojun 779: continue;
780: }
1.55 itojun 781: #ifndef INET6_BINDV6ONLY
782: else {
1.79 itojun 783: if (IN6_IS_ADDR_V4MAPPED(&dst6) &&
784: (in6p->in6p_flags & IN6P_BINDV6ONLY))
1.55 itojun 785: continue;
786: }
787: #endif
1.53 itojun 788: if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
1.79 itojun 789: if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr,
790: &src6) || in6p->in6p_fport != sport)
1.53 itojun 791: continue;
792: }
1.55 itojun 793: #ifndef INET6_BINDV6ONLY
794: else {
1.79 itojun 795: if (IN6_IS_ADDR_V4MAPPED(&src6) &&
796: (in6p->in6p_flags & IN6P_BINDV6ONLY))
1.55 itojun 797: continue;
798: }
799: #endif
1.53 itojun 800:
801: last = in6p;
802: udp6_sendup(m, off, (struct sockaddr *)src,
803: in6p->in6p_socket);
804: rcvcnt++;
805:
806: /*
807: * Don't look for additional matches if this one does
808: * not have either the SO_REUSEPORT or SO_REUSEADDR
809: * socket options set. This heuristic avoids searching
810: * through all pcbs in the common case of a non-shared
811: * port. It assumes that an application will never
812: * clear these options after setting them.
813: */
814: if ((in6p->in6p_socket->so_options &
815: (SO_REUSEPORT|SO_REUSEADDR)) == 0)
816: break;
817: }
818: } else {
819: /*
820: * Locate pcb for datagram.
821: */
1.79 itojun 822: in6p = in6_pcblookup_connect(&udb6, &src6, sport,
823: &dst6, dport, 0);
1.53 itojun 824: if (in6p == 0) {
825: ++udpstat.udps_pcbhashmiss;
1.79 itojun 826: in6p = in6_pcblookup_bind(&udb6, &dst6, dport, 0);
1.82 ! itojun 827: if (in6p == 0)
1.53 itojun 828: return rcvcnt;
829: }
830:
831: udp6_sendup(m, off, (struct sockaddr *)src, in6p->in6p_socket);
832: rcvcnt++;
833: }
834:
835: bad:
836: return rcvcnt;
837: }
838: #endif
839:
1.56 itojun 840: #else /*UDP6*/
841:
1.53 itojun 842: void
843: #if __STDC__
844: udp_input(struct mbuf *m, ...)
845: #else
846: udp_input(m, va_alist)
847: struct mbuf *m;
848: va_dcl
849: #endif
850: {
1.48 itojun 851: int proto;
1.66 augustss 852: struct ip *ip;
853: struct udphdr *uh;
854: struct inpcb *inp;
1.1 cgd 855: struct mbuf *opts = 0;
856: int len;
857: struct ip save_ip;
1.27 christos 858: int iphlen;
859: va_list ap;
1.34 mycroft 860: struct sockaddr_in udpsrc;
1.48 itojun 861: struct sockaddr *sa;
1.27 christos 862:
863: va_start(ap, m);
864: iphlen = va_arg(ap, int);
1.48 itojun 865: proto = va_arg(ap, int);
1.27 christos 866: va_end(ap);
1.1 cgd 867:
868: udpstat.udps_ipackets++;
869:
870: /*
871: * Strip IP options, if any; should skip this,
872: * make available to user, and use on returned packets,
873: * but we don't yet have a way to check the checksum
874: * with options still present.
875: */
876: if (iphlen > sizeof (struct ip)) {
877: ip_stripoptions(m, (struct mbuf *)0);
878: iphlen = sizeof(struct ip);
879: }
880:
881: /*
882: * Get IP and UDP header together in first mbuf.
883: */
884: ip = mtod(m, struct ip *);
885: if (m->m_len < iphlen + sizeof(struct udphdr)) {
886: if ((m = m_pullup(m, iphlen + sizeof(struct udphdr))) == 0) {
887: udpstat.udps_hdrops++;
888: return;
889: }
890: ip = mtod(m, struct ip *);
891: }
892: uh = (struct udphdr *)((caddr_t)ip + iphlen);
1.57 itojun 893:
894: /* destination port of 0 is illegal, based on RFC768. */
895: if (uh->uh_dport == 0)
896: goto bad;
1.1 cgd 897:
898: /*
899: * Make mbuf data length reflect UDP length.
900: * If not enough data to reflect UDP length, drop.
901: */
1.15 cgd 902: len = ntohs((u_int16_t)uh->uh_ulen);
1.47 mycroft 903: if (ip->ip_len != iphlen + len) {
1.70 sommerfe 904: if (ip->ip_len < iphlen + len || len < sizeof(struct udphdr)) {
1.1 cgd 905: udpstat.udps_badlen++;
906: goto bad;
907: }
1.47 mycroft 908: m_adj(m, iphlen + len - ip->ip_len);
1.1 cgd 909: }
910: /*
911: * Save a copy of the IP header in case we want restore it
912: * for sending an ICMP error message in response.
913: */
914: save_ip = *ip;
915:
916: /*
917: * Checksum extended UDP header and data.
918: */
1.29 mrg 919: if (uh->uh_sum) {
1.78 thorpej 920: switch (m->m_pkthdr.csum_flags &
921: ((m->m_pkthdr.rcvif->if_csum_flags & M_CSUM_UDPv4) |
922: M_CSUM_TCP_UDP_BAD | M_CSUM_DATA)) {
923: case M_CSUM_UDPv4|M_CSUM_TCP_UDP_BAD:
924: UDP_CSUM_COUNTER_INCR(&udp_hwcsum_bad);
925: goto badcsum;
926:
927: case M_CSUM_UDPv4|M_CSUM_DATA:
928: UDP_CSUM_COUNTER_INCR(&udp_hwcsum_data);
929: if ((m->m_pkthdr.csum_data ^ 0xffff) != 0)
930: goto badcsum;
931: break;
932:
933: case M_CSUM_UDPv4:
934: /* Checksum was okay. */
935: UDP_CSUM_COUNTER_INCR(&udp_hwcsum_ok);
936: break;
937:
938: default:
939: /* Need to compute it ourselves. */
940: UDP_CSUM_COUNTER_INCR(&udp_swcsum);
941: bzero(((struct ipovly *)ip)->ih_x1,
942: sizeof ((struct ipovly *)ip)->ih_x1);
943: ((struct ipovly *)ip)->ih_len = uh->uh_ulen;
944: if (in_cksum(m, len + sizeof (struct ip)) != 0)
945: goto badcsum;
946: break;
1.1 cgd 947: }
948: }
1.13 mycroft 949:
1.48 itojun 950: /*
951: * Construct sockaddr format source address.
952: */
953: udpsrc.sin_family = AF_INET;
954: udpsrc.sin_len = sizeof(struct sockaddr_in);
955: udpsrc.sin_addr = ip->ip_src;
956: udpsrc.sin_port = uh->uh_sport;
957: bzero((caddr_t)udpsrc.sin_zero, sizeof(udpsrc.sin_zero));
958:
1.16 mycroft 959: if (IN_MULTICAST(ip->ip_dst.s_addr) ||
1.13 mycroft 960: in_broadcast(ip->ip_dst, m->m_pkthdr.rcvif)) {
1.40 thorpej 961: struct inpcb *last;
1.4 hpeyerl 962: /*
963: * Deliver a multicast or broadcast datagram to *all* sockets
964: * for which the local and remote addresses and ports match
965: * those of the incoming datagram. This allows more than
966: * one process to receive multi/broadcasts on the same port.
967: * (This really ought to be done for unicast datagrams as
968: * well, but that would cause problems with existing
969: * applications that open both address-specific sockets and
970: * a wildcard socket listening to the same port -- they would
971: * end up receiving duplicates of every unicast datagram.
972: * Those applications open the multiple sockets to overcome an
973: * inadequacy of the UDP socket interface, but for backwards
974: * compatibility we avoid the problem here rather than
1.13 mycroft 975: * fixing the interface. Maybe 4.5BSD will remedy this?)
1.4 hpeyerl 976: */
1.13 mycroft 977:
1.48 itojun 978: iphlen += sizeof(struct udphdr);
1.4 hpeyerl 979: /*
1.48 itojun 980: * KAME note: usually we drop udpiphdr from mbuf here.
1.71 itojun 981: * we need udpiphdr for IPsec processing so we do that later.
1.4 hpeyerl 982: */
983: /*
984: * Locate pcb(s) for datagram.
985: * (Algorithm copied from raw_intr().)
986: */
987: last = NULL;
1.22 cgd 988: for (inp = udbtable.inpt_queue.cqh_first;
989: inp != (struct inpcb *)&udbtable.inpt_queue;
990: inp = inp->inp_queue.cqe_next) {
1.4 hpeyerl 991: if (inp->inp_lport != uh->uh_dport)
992: continue;
1.34 mycroft 993: if (!in_nullhost(inp->inp_laddr)) {
994: if (!in_hosteq(inp->inp_laddr, ip->ip_dst))
1.4 hpeyerl 995: continue;
996: }
1.34 mycroft 997: if (!in_nullhost(inp->inp_faddr)) {
998: if (!in_hosteq(inp->inp_faddr, ip->ip_src) ||
1.4 hpeyerl 999: inp->inp_fport != uh->uh_sport)
1000: continue;
1001: }
1002:
1003: if (last != NULL) {
1004: struct mbuf *n;
1005:
1.48 itojun 1006: #ifdef IPSEC
1007: /* check AH/ESP integrity. */
1008: if (last != NULL && ipsec4_in_reject(m, last)) {
1009: ipsecstat.in_polvio++;
1010: /* do not inject data to pcb */
1011: } else
1012: #endif /*IPSEC*/
1.4 hpeyerl 1013: if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
1.40 thorpej 1014: if (last->inp_flags & INP_CONTROLOPTS
1015: || last->inp_socket->so_options &
1016: SO_TIMESTAMP) {
1017: ip_savecontrol(last, &opts,
1018: ip, n);
1019: }
1.49 drochner 1020: m_adj(n, iphlen);
1.48 itojun 1021: sa = (struct sockaddr *)&udpsrc;
1.40 thorpej 1022: if (sbappendaddr(
1023: &last->inp_socket->so_rcv,
1.48 itojun 1024: sa, n, opts) == 0) {
1.4 hpeyerl 1025: m_freem(n);
1.40 thorpej 1026: if (opts)
1027: m_freem(opts);
1.81 enami 1028: udpstat.udps_fullsock++;
1.13 mycroft 1029: } else
1.40 thorpej 1030: sorwakeup(last->inp_socket);
1031: opts = 0;
1.4 hpeyerl 1032: }
1033: }
1.40 thorpej 1034: last = inp;
1.4 hpeyerl 1035: /*
1.13 mycroft 1036: * Don't look for additional matches if this one does
1037: * not have either the SO_REUSEPORT or SO_REUSEADDR
1038: * socket options set. This heuristic avoids searching
1039: * through all pcbs in the common case of a non-shared
1040: * port. It * assumes that an application will never
1041: * clear these options after setting them.
1.4 hpeyerl 1042: */
1.40 thorpej 1043: if ((last->inp_socket->so_options &
1044: (SO_REUSEPORT|SO_REUSEADDR)) == 0)
1.4 hpeyerl 1045: break;
1046: }
1.6 mycroft 1047:
1.4 hpeyerl 1048: if (last == NULL) {
1049: /*
1050: * No matching pcb found; discard datagram.
1051: * (No need to send an ICMP Port Unreachable
1052: * for a broadcast or multicast datgram.)
1053: */
1.13 mycroft 1054: udpstat.udps_noportbcast++;
1.4 hpeyerl 1055: goto bad;
1056: }
1.48 itojun 1057: #ifdef IPSEC
1058: /* check AH/ESP integrity. */
1059: if (last != NULL && ipsec4_in_reject(m, last)) {
1060: ipsecstat.in_polvio++;
1061: goto bad;
1062: }
1063: #endif /*IPSEC*/
1.40 thorpej 1064: if (last->inp_flags & INP_CONTROLOPTS ||
1065: last->inp_socket->so_options & SO_TIMESTAMP)
1066: ip_savecontrol(last, &opts, ip, m);
1.49 drochner 1067: m->m_len -= iphlen;
1068: m->m_pkthdr.len -= iphlen;
1069: m->m_data += iphlen;
1.48 itojun 1070: sa = (struct sockaddr *)&udpsrc;
1071: if (sbappendaddr(&last->inp_socket->so_rcv, sa, m, opts) == 0) {
1.13 mycroft 1072: udpstat.udps_fullsock++;
1.4 hpeyerl 1073: goto bad;
1.13 mycroft 1074: }
1.40 thorpej 1075: sorwakeup(last->inp_socket);
1.4 hpeyerl 1076: return;
1077: }
1.1 cgd 1078: /*
1079: * Locate pcb for datagram.
1080: */
1.35 mycroft 1081: inp = in_pcblookup_connect(&udbtable, ip->ip_src, uh->uh_sport,
1.26 mycroft 1082: ip->ip_dst, uh->uh_dport);
1083: if (inp == 0) {
1084: ++udpstat.udps_pcbhashmiss;
1.35 mycroft 1085: inp = in_pcblookup_bind(&udbtable, ip->ip_dst, uh->uh_dport);
1.18 mycroft 1086: if (inp == 0) {
1087: if (m->m_flags & (M_BCAST | M_MCAST)) {
1088: udpstat.udps_noportbcast++;
1089: goto bad;
1090: }
1.61 itojun 1091: udpstat.udps_noport++;
1.18 mycroft 1092: *ip = save_ip;
1.64 ws 1093: #ifdef IPKDB
1.38 ws 1094: if (checkipkdb(&ip->ip_src,
1095: uh->uh_sport,
1096: uh->uh_dport,
1097: m,
1098: iphlen + sizeof(struct udphdr),
1099: len - sizeof(struct udphdr)))
1.37 ws 1100: /* It was a debugger connect packet, just drop it now */
1101: goto bad;
1102: #endif
1.18 mycroft 1103: icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0);
1104: return;
1.13 mycroft 1105: }
1.1 cgd 1106: }
1.48 itojun 1107: #ifdef IPSEC
1108: if (inp != NULL && ipsec4_in_reject(m, inp)) {
1109: ipsecstat.in_polvio++;
1110: goto bad;
1111: }
1112: #endif /*IPSEC*/
1.1 cgd 1113:
1114: /*
1115: * Stuff source address and datagram in user buffer.
1116: */
1.40 thorpej 1117: if (inp->inp_flags & INP_CONTROLOPTS ||
1118: inp->inp_socket->so_options & SO_TIMESTAMP)
1119: ip_savecontrol(inp, &opts, ip, m);
1.1 cgd 1120: iphlen += sizeof(struct udphdr);
1121: m->m_len -= iphlen;
1122: m->m_pkthdr.len -= iphlen;
1123: m->m_data += iphlen;
1.48 itojun 1124: sa = (struct sockaddr *)&udpsrc;
1125: if (sbappendaddr(&inp->inp_socket->so_rcv, sa, m, opts) == 0) {
1.1 cgd 1126: udpstat.udps_fullsock++;
1127: goto bad;
1128: }
1129: sorwakeup(inp->inp_socket);
1130: return;
1131: bad:
1132: m_freem(m);
1133: if (opts)
1134: m_freem(opts);
1.78 thorpej 1135: return;
1136:
1137: badcsum:
1138: udpstat.udps_badsum++;
1139: m_freem(m);
1.1 cgd 1140: }
1.56 itojun 1141: #endif /*UDP6*/
1.1 cgd 1142:
1.72 itojun 1143: #ifdef INET
1.1 cgd 1144: /*
1145: * Notify a udp user of an asynchronous error;
1146: * just wake up so that he can collect error status.
1147: */
1.7 mycroft 1148: static void
1.1 cgd 1149: udp_notify(inp, errno)
1.66 augustss 1150: struct inpcb *inp;
1.7 mycroft 1151: int errno;
1.1 cgd 1152: {
1.34 mycroft 1153:
1.1 cgd 1154: inp->inp_socket->so_error = errno;
1155: sorwakeup(inp->inp_socket);
1156: sowwakeup(inp->inp_socket);
1157: }
1158:
1.27 christos 1159: void *
1160: udp_ctlinput(cmd, sa, v)
1.1 cgd 1161: int cmd;
1162: struct sockaddr *sa;
1.27 christos 1163: void *v;
1.1 cgd 1164: {
1.66 augustss 1165: struct ip *ip = v;
1166: struct udphdr *uh;
1.18 mycroft 1167: void (*notify) __P((struct inpcb *, int)) = udp_notify;
1.21 mycroft 1168: int errno;
1.1 cgd 1169:
1.53 itojun 1170: if (sa->sa_family != AF_INET
1171: || sa->sa_len != sizeof(struct sockaddr_in))
1.51 itojun 1172: return NULL;
1.20 mycroft 1173: if ((unsigned)cmd >= PRC_NCMDS)
1.27 christos 1174: return NULL;
1.20 mycroft 1175: errno = inetctlerrmap[cmd];
1.18 mycroft 1176: if (PRC_IS_REDIRECT(cmd))
1.19 mycroft 1177: notify = in_rtchange, ip = 0;
1.18 mycroft 1178: else if (cmd == PRC_HOSTDEAD)
1.19 mycroft 1179: ip = 0;
1.23 cgd 1180: else if (errno == 0)
1.27 christos 1181: return NULL;
1.19 mycroft 1182: if (ip) {
1.1 cgd 1183: uh = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2));
1.34 mycroft 1184: in_pcbnotify(&udbtable, satosin(sa)->sin_addr, uh->uh_dport,
1185: ip->ip_src, uh->uh_sport, errno, notify);
1.53 itojun 1186:
1187: /* XXX mapped address case */
1.19 mycroft 1188: } else
1.34 mycroft 1189: in_pcbnotifyall(&udbtable, satosin(sa)->sin_addr, errno,
1190: notify);
1.27 christos 1191: return NULL;
1.1 cgd 1192: }
1193:
1.7 mycroft 1194: int
1.27 christos 1195: #if __STDC__
1196: udp_output(struct mbuf *m, ...)
1197: #else
1198: udp_output(m, va_alist)
1199: struct mbuf *m;
1200: va_dcl
1201: #endif
1202: {
1.66 augustss 1203: struct inpcb *inp;
1204: struct udpiphdr *ui;
1205: int len = m->m_pkthdr.len;
1.31 mycroft 1206: int error = 0;
1.27 christos 1207: va_list ap;
1208:
1209: va_start(ap, m);
1210: inp = va_arg(ap, struct inpcb *);
1211: va_end(ap);
1.1 cgd 1212:
1213: /*
1214: * Calculate data length and get a mbuf
1215: * for UDP and IP headers.
1216: */
1.13 mycroft 1217: M_PREPEND(m, sizeof(struct udpiphdr), M_DONTWAIT);
1218: if (m == 0) {
1219: error = ENOBUFS;
1.39 thorpej 1220: goto release;
1221: }
1222:
1223: /*
1224: * Compute the packet length of the IP header, and
1225: * punt if the length looks bogus.
1226: */
1227: if ((len + sizeof(struct udpiphdr)) > IP_MAXPACKET) {
1228: error = EMSGSIZE;
1.13 mycroft 1229: goto release;
1230: }
1.1 cgd 1231:
1232: /*
1233: * Fill in mbuf with extended UDP header
1234: * and addresses and length put into network format.
1235: */
1236: ui = mtod(m, struct udpiphdr *);
1237: ui->ui_pr = IPPROTO_UDP;
1238: ui->ui_src = inp->inp_laddr;
1239: ui->ui_dst = inp->inp_faddr;
1240: ui->ui_sport = inp->inp_lport;
1241: ui->ui_dport = inp->inp_fport;
1.78 thorpej 1242: ui->ui_ulen = htons((u_int16_t)len + sizeof(struct udphdr));
1.1 cgd 1243:
1244: /*
1.78 thorpej 1245: * Set up checksum and output datagram.
1.1 cgd 1246: */
1247: if (udpcksum) {
1.78 thorpej 1248: /*
1249: * XXX Cache pseudo-header checksum part for
1250: * XXX "connected" UDP sockets.
1251: */
1252: ui->ui_sum = in_cksum_phdr(ui->ui_src.s_addr,
1253: ui->ui_dst.s_addr, htons((u_int16_t)len +
1254: sizeof(struct udphdr) + IPPROTO_UDP));
1255: m->m_pkthdr.csum_flags = M_CSUM_UDPv4;
1256: m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum);
1257: } else
1258: ui->ui_sum = 0;
1.1 cgd 1259: ((struct ip *)ui)->ip_len = sizeof (struct udpiphdr) + len;
1260: ((struct ip *)ui)->ip_ttl = inp->inp_ip.ip_ttl; /* XXX */
1261: ((struct ip *)ui)->ip_tos = inp->inp_ip.ip_tos; /* XXX */
1262: udpstat.udps_opackets++;
1.48 itojun 1263:
1264: #ifdef IPSEC
1.75 itojun 1265: if (ipsec_setsocket(m, inp->inp_socket) != 0) {
1266: error = ENOBUFS;
1267: goto release;
1268: }
1.48 itojun 1269: #endif /*IPSEC*/
1270:
1.31 mycroft 1271: return (ip_output(m, inp->inp_options, &inp->inp_route,
1.12 mycroft 1272: inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST),
1.31 mycroft 1273: inp->inp_moptions));
1.1 cgd 1274:
1275: release:
1276: m_freem(m);
1277: return (error);
1278: }
1279:
1.42 thorpej 1280: int udp_sendspace = 9216; /* really max datagram size */
1281: int udp_recvspace = 40 * (1024 + sizeof(struct sockaddr_in));
1.1 cgd 1282: /* 40 1K datagrams */
1283:
1284: /*ARGSUSED*/
1.7 mycroft 1285: int
1.31 mycroft 1286: udp_usrreq(so, req, m, nam, control, p)
1.1 cgd 1287: struct socket *so;
1288: int req;
1.31 mycroft 1289: struct mbuf *m, *nam, *control;
1.30 mycroft 1290: struct proc *p;
1.1 cgd 1291: {
1.66 augustss 1292: struct inpcb *inp;
1.1 cgd 1293: int s;
1.66 augustss 1294: int error = 0;
1.1 cgd 1295:
1296: if (req == PRU_CONTROL)
1.31 mycroft 1297: return (in_control(so, (long)m, (caddr_t)nam,
1.30 mycroft 1298: (struct ifnet *)control, p));
1.59 thorpej 1299:
1.60 thorpej 1300: if (req == PRU_PURGEIF) {
1.80 itojun 1301: in_pcbpurgeif0(&udbtable, (struct ifnet *)control);
1.60 thorpej 1302: in_purgeif((struct ifnet *)control);
1303: in_pcbpurgeif(&udbtable, (struct ifnet *)control);
1.59 thorpej 1304: return (0);
1305: }
1.31 mycroft 1306:
1307: s = splsoftnet();
1308: inp = sotoinpcb(so);
1.32 mycroft 1309: #ifdef DIAGNOSTIC
1310: if (req != PRU_SEND && req != PRU_SENDOOB && control)
1311: panic("udp_usrreq: unexpected control mbuf");
1312: #endif
1.31 mycroft 1313: if (inp == 0 && req != PRU_ATTACH) {
1314: error = EINVAL;
1315: goto release;
1316: }
1317:
1.1 cgd 1318: /*
1319: * Note: need to block udp_input while changing
1320: * the udp pcb queue and/or pcb addresses.
1321: */
1322: switch (req) {
1323:
1324: case PRU_ATTACH:
1.31 mycroft 1325: if (inp != 0) {
1326: error = EISCONN;
1.1 cgd 1327: break;
1328: }
1.31 mycroft 1329: if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
1330: error = soreserve(so, udp_sendspace, udp_recvspace);
1331: if (error)
1332: break;
1333: }
1.18 mycroft 1334: error = in_pcballoc(so, &udbtable);
1.1 cgd 1335: if (error)
1336: break;
1.31 mycroft 1337: inp = sotoinpcb(so);
1338: inp->inp_ip.ip_ttl = ip_defttl;
1.48 itojun 1339: #ifdef IPSEC
1.58 itojun 1340: error = ipsec_init_policy(so, &inp->inp_sp);
1.53 itojun 1341: if (error != 0) {
1.52 itojun 1342: in_pcbdetach(inp);
1.53 itojun 1343: break;
1344: }
1.48 itojun 1345: #endif /*IPSEC*/
1.1 cgd 1346: break;
1347:
1348: case PRU_DETACH:
1.31 mycroft 1349: in_pcbdetach(inp);
1.1 cgd 1350: break;
1351:
1352: case PRU_BIND:
1.31 mycroft 1353: error = in_pcbbind(inp, nam, p);
1.1 cgd 1354: break;
1355:
1356: case PRU_LISTEN:
1357: error = EOPNOTSUPP;
1358: break;
1359:
1360: case PRU_CONNECT:
1.31 mycroft 1361: error = in_pcbconnect(inp, nam);
1362: if (error)
1.1 cgd 1363: break;
1.31 mycroft 1364: soisconnected(so);
1.1 cgd 1365: break;
1366:
1367: case PRU_CONNECT2:
1368: error = EOPNOTSUPP;
1369: break;
1370:
1371: case PRU_DISCONNECT:
1.31 mycroft 1372: /*soisdisconnected(so);*/
1373: so->so_state &= ~SS_ISCONNECTED; /* XXX */
1.1 cgd 1374: in_pcbdisconnect(inp);
1.34 mycroft 1375: inp->inp_laddr = zeroin_addr; /* XXX */
1.35 mycroft 1376: in_pcbstate(inp, INP_BOUND); /* XXX */
1.1 cgd 1377: break;
1378:
1379: case PRU_SHUTDOWN:
1380: socantsendmore(so);
1381: break;
1382:
1.31 mycroft 1383: case PRU_RCVD:
1384: error = EOPNOTSUPP;
1.1 cgd 1385: break;
1386:
1.31 mycroft 1387: case PRU_SEND:
1.32 mycroft 1388: if (control && control->m_len) {
1389: m_freem(control);
1390: m_freem(m);
1391: error = EINVAL;
1392: break;
1393: }
1.31 mycroft 1394: {
1.35 mycroft 1395: struct in_addr laddr; /* XXX */
1.1 cgd 1396:
1.31 mycroft 1397: if (nam) {
1.35 mycroft 1398: laddr = inp->inp_laddr; /* XXX */
1.31 mycroft 1399: if ((so->so_state & SS_ISCONNECTED) != 0) {
1400: error = EISCONN;
1.32 mycroft 1401: goto die;
1.31 mycroft 1402: }
1403: error = in_pcbconnect(inp, nam);
1.32 mycroft 1404: if (error) {
1405: die:
1406: m_freem(m);
1.31 mycroft 1407: break;
1.32 mycroft 1408: }
1.31 mycroft 1409: } else {
1410: if ((so->so_state & SS_ISCONNECTED) == 0) {
1411: error = ENOTCONN;
1.32 mycroft 1412: goto die;
1.31 mycroft 1413: }
1414: }
1.33 mycroft 1415: error = udp_output(m, inp);
1.31 mycroft 1416: if (nam) {
1417: in_pcbdisconnect(inp);
1.35 mycroft 1418: inp->inp_laddr = laddr; /* XXX */
1419: in_pcbstate(inp, INP_BOUND); /* XXX */
1.31 mycroft 1420: }
1421: }
1.1 cgd 1422: break;
1423:
1424: case PRU_SENSE:
1425: /*
1426: * stat: don't bother with a blocksize.
1427: */
1.31 mycroft 1428: splx(s);
1.1 cgd 1429: return (0);
1430:
1.31 mycroft 1431: case PRU_RCVOOB:
1432: error = EOPNOTSUPP;
1433: break;
1434:
1.1 cgd 1435: case PRU_SENDOOB:
1.32 mycroft 1436: m_freem(control);
1.31 mycroft 1437: m_freem(m);
1.1 cgd 1438: error = EOPNOTSUPP;
1439: break;
1440:
1.31 mycroft 1441: case PRU_SOCKADDR:
1442: in_setsockaddr(inp, nam);
1443: break;
1444:
1445: case PRU_PEERADDR:
1446: in_setpeeraddr(inp, nam);
1447: break;
1.1 cgd 1448:
1449: default:
1450: panic("udp_usrreq");
1451: }
1452:
1453: release:
1.31 mycroft 1454: splx(s);
1.1 cgd 1455: return (error);
1.13 mycroft 1456: }
1457:
1458: /*
1459: * Sysctl for udp variables.
1460: */
1.27 christos 1461: int
1.13 mycroft 1462: udp_sysctl(name, namelen, oldp, oldlenp, newp, newlen)
1463: int *name;
1464: u_int namelen;
1465: void *oldp;
1466: size_t *oldlenp;
1467: void *newp;
1468: size_t newlen;
1469: {
1470: /* All sysctl names at this level are terminal. */
1471: if (namelen != 1)
1472: return (ENOTDIR);
1473:
1474: switch (name[0]) {
1475: case UDPCTL_CHECKSUM:
1476: return (sysctl_int(oldp, oldlenp, newp, newlen, &udpcksum));
1.42 thorpej 1477: case UDPCTL_SENDSPACE:
1478: return (sysctl_int(oldp, oldlenp, newp, newlen,
1479: &udp_sendspace));
1480: case UDPCTL_RECVSPACE:
1481: return (sysctl_int(oldp, oldlenp, newp, newlen,
1482: &udp_recvspace));
1.13 mycroft 1483: default:
1484: return (ENOPROTOOPT);
1485: }
1486: /* NOTREACHED */
1.1 cgd 1487: }
1.72 itojun 1488: #endif
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