Annotation of src/sys/netinet/udp_usrreq.c, Revision 1.81
1.81 ! enami 1: /* $NetBSD: udp_usrreq.c,v 1.80 2001/07/03 08:06:20 itojun 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:
674: #if 0
675: if (last == NULL) {
676: /*
677: * No matching pcb found; discard datagram.
678: * (No need to send an ICMP Port Unreachable
679: * for a broadcast or multicast datgram.)
680: */
681: udpstat.udps_noportbcast++;
682: goto bad;
683: }
684: #endif
685: } else {
686: /*
687: * Locate pcb for datagram.
688: */
689: inp = in_pcblookup_connect(&udbtable, *src4, *sport, *dst4, *dport);
690: if (inp == 0) {
691: ++udpstat.udps_pcbhashmiss;
692: inp = in_pcblookup_bind(&udbtable, *dst4, *dport);
693: if (inp == 0) {
694: #if 0
695: struct mbuf *n;
696:
697: if (m->m_flags & (M_BCAST | M_MCAST)) {
698: udpstat.udps_noportbcast++;
699: goto bad;
700: }
1.61 itojun 701: udpstat.udps_noport++;
1.64 ws 702: #ifdef IPKDB
1.53 itojun 703: if (checkipkdb(src4, *sport, *dport, m, off,
704: m->m_pkthdr.len - off)) {
705: /*
706: * It was a debugger connect packet,
707: * just drop it now
708: */
709: goto bad;
710: }
711: #endif
712: if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
713: icmp_error(n, ICMP_UNREACH,
714: ICMP_UNREACH_PORT, 0, 0);
715: }
716: #endif
717: return rcvcnt;
718: }
719: }
720:
721: udp4_sendup(m, off, (struct sockaddr *)src, inp->inp_socket);
722: rcvcnt++;
723: }
724:
725: bad:
726: return rcvcnt;
727: }
1.72 itojun 728: #endif
1.53 itojun 729:
730: #ifdef INET6
731: static int
732: in6_mcmatch(in6p, ia6, ifp)
733: struct in6pcb *in6p;
1.66 augustss 734: struct in6_addr *ia6;
1.53 itojun 735: struct ifnet *ifp;
736: {
737: struct ip6_moptions *im6o = in6p->in6p_moptions;
738: struct in6_multi_mship *imm;
739:
740: if (im6o == NULL)
741: return 0;
742:
743: for (imm = im6o->im6o_memberships.lh_first; imm != NULL;
744: imm = imm->i6mm_chain.le_next) {
745: if ((ifp == NULL ||
746: imm->i6mm_maddr->in6m_ifp == ifp) &&
747: IN6_ARE_ADDR_EQUAL(&imm->i6mm_maddr->in6m_addr,
748: ia6))
749: return 1;
750: }
751: return 0;
752: }
753:
754: static int
755: udp6_realinput(af, src, dst, m, off)
756: int af; /* af on packet */
757: struct sockaddr_in6 *src;
758: struct sockaddr_in6 *dst;
759: struct mbuf *m;
760: int off; /* offset of udphdr */
761: {
1.79 itojun 762: u_int16_t sport, dport;
1.53 itojun 763: int rcvcnt;
1.79 itojun 764: struct in6_addr src6, dst6;
765: const struct in_addr *dst4;
1.53 itojun 766: struct in6pcb *in6p;
767:
768: rcvcnt = 0;
769: off += sizeof(struct udphdr); /* now, offset of payload */
770:
771: if (af != AF_INET && af != AF_INET6)
772: goto bad;
773: if (src->sin6_family != AF_INET6 || dst->sin6_family != AF_INET6)
774: goto bad;
775:
1.79 itojun 776: in6_embedscope(&src6, src, NULL, NULL);
777: sport = src->sin6_port;
778: in6_embedscope(&dst6, dst, NULL, NULL);
779: dport = dst->sin6_port;
1.74 itojun 780: dst4 = (struct in_addr *)&dst->sin6_addr.s6_addr32[12];
1.53 itojun 781:
1.79 itojun 782: if (IN6_IS_ADDR_MULTICAST(&dst6) ||
783: (af == AF_INET && IN_MULTICAST(dst4->s_addr))) {
1.53 itojun 784: struct in6pcb *last;
785: /*
786: * Deliver a multicast or broadcast datagram to *all* sockets
787: * for which the local and remote addresses and ports match
788: * those of the incoming datagram. This allows more than
789: * one process to receive multi/broadcasts on the same port.
790: * (This really ought to be done for unicast datagrams as
791: * well, but that would cause problems with existing
792: * applications that open both address-specific sockets and
793: * a wildcard socket listening to the same port -- they would
794: * end up receiving duplicates of every unicast datagram.
795: * Those applications open the multiple sockets to overcome an
796: * inadequacy of the UDP socket interface, but for backwards
797: * compatibility we avoid the problem here rather than
798: * fixing the interface. Maybe 4.5BSD will remedy this?)
799: */
800:
801: /*
802: * KAME note: usually we drop udpiphdr from mbuf here.
1.71 itojun 803: * we need udpiphdr for IPsec processing so we do that later.
1.53 itojun 804: */
805: /*
806: * Locate pcb(s) for datagram.
807: */
808: for (in6p = udb6.in6p_next; in6p != &udb6;
809: in6p = in6p->in6p_next) {
1.79 itojun 810: if (in6p->in6p_lport != dport)
1.53 itojun 811: continue;
812: if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) {
1.79 itojun 813: if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &dst6) &&
814: !in6_mcmatch(in6p, &dst6, m->m_pkthdr.rcvif))
1.53 itojun 815: continue;
816: }
1.55 itojun 817: #ifndef INET6_BINDV6ONLY
818: else {
1.79 itojun 819: if (IN6_IS_ADDR_V4MAPPED(&dst6) &&
820: (in6p->in6p_flags & IN6P_BINDV6ONLY))
1.55 itojun 821: continue;
822: }
823: #endif
1.53 itojun 824: if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
1.79 itojun 825: if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr,
826: &src6) || in6p->in6p_fport != sport)
1.53 itojun 827: continue;
828: }
1.55 itojun 829: #ifndef INET6_BINDV6ONLY
830: else {
1.79 itojun 831: if (IN6_IS_ADDR_V4MAPPED(&src6) &&
832: (in6p->in6p_flags & IN6P_BINDV6ONLY))
1.55 itojun 833: continue;
834: }
835: #endif
1.53 itojun 836:
837: last = in6p;
838: udp6_sendup(m, off, (struct sockaddr *)src,
839: in6p->in6p_socket);
840: rcvcnt++;
841:
842: /*
843: * Don't look for additional matches if this one does
844: * not have either the SO_REUSEPORT or SO_REUSEADDR
845: * socket options set. This heuristic avoids searching
846: * through all pcbs in the common case of a non-shared
847: * port. It assumes that an application will never
848: * clear these options after setting them.
849: */
850: if ((in6p->in6p_socket->so_options &
851: (SO_REUSEPORT|SO_REUSEADDR)) == 0)
852: break;
853: }
854:
855: #if 0
856: if (last == NULL) {
857: /*
858: * No matching pcb found; discard datagram.
859: * (No need to send an ICMP Port Unreachable
860: * for a broadcast or multicast datgram.)
861: */
862: switch (af) {
863: case AF_INET:
864: udpstat.udps_noportbcast++;
865: break;
866: case AF_INET6:
867: udp6stat.udp6s_noportmcast++;
868: break;
869: }
870: goto bad;
871: }
872: #endif
873: } else {
874: /*
875: * Locate pcb for datagram.
876: */
1.79 itojun 877: in6p = in6_pcblookup_connect(&udb6, &src6, sport,
878: &dst6, dport, 0);
1.53 itojun 879: if (in6p == 0) {
880: ++udpstat.udps_pcbhashmiss;
1.79 itojun 881: in6p = in6_pcblookup_bind(&udb6, &dst6, dport, 0);
1.53 itojun 882: if (in6p == 0) {
883: #if 0
884: struct mbuf *n;
885: n = m_copy(m, 0, M_COPYALL);
886: switch (af) {
887: case AF_INET:
888: if (m->m_flags & (M_BCAST | M_MCAST)) {
889: udpstat.udps_noportbcast++;
890: goto bad;
891: }
1.61 itojun 892: udpstat.udps_noport++;
1.53 itojun 893: if (n != NULL)
894: icmp_error(n, ICMP_UNREACH,
895: ICMP_UNREACH_PORT, 0, 0);
896: break;
897: case AF_INET6:
898: if (m->m_flags & M_MCAST) {
899: udp6stat.udp6s_noportmcast++;
900: goto bad;
901: }
1.61 itojun 902: udp6stat.udp6s_noport++;
1.53 itojun 903: if (n != NULL)
904: icmp6_error(n, ICMP6_DST_UNREACH,
905: ICMP6_DST_UNREACH_NOPORT, 0);
906: break;
907: }
908: #endif
909:
910: return rcvcnt;
911: }
912: }
913:
914: udp6_sendup(m, off, (struct sockaddr *)src, in6p->in6p_socket);
915: rcvcnt++;
916: }
917:
918: bad:
919: return rcvcnt;
920: }
921: #endif
922:
1.56 itojun 923: #else /*UDP6*/
924:
1.53 itojun 925: void
926: #if __STDC__
927: udp_input(struct mbuf *m, ...)
928: #else
929: udp_input(m, va_alist)
930: struct mbuf *m;
931: va_dcl
932: #endif
933: {
1.48 itojun 934: int proto;
1.66 augustss 935: struct ip *ip;
936: struct udphdr *uh;
937: struct inpcb *inp;
1.1 cgd 938: struct mbuf *opts = 0;
939: int len;
940: struct ip save_ip;
1.27 christos 941: int iphlen;
942: va_list ap;
1.34 mycroft 943: struct sockaddr_in udpsrc;
1.48 itojun 944: struct sockaddr *sa;
1.27 christos 945:
946: va_start(ap, m);
947: iphlen = va_arg(ap, int);
1.48 itojun 948: proto = va_arg(ap, int);
1.27 christos 949: va_end(ap);
1.1 cgd 950:
951: udpstat.udps_ipackets++;
952:
953: /*
954: * Strip IP options, if any; should skip this,
955: * make available to user, and use on returned packets,
956: * but we don't yet have a way to check the checksum
957: * with options still present.
958: */
959: if (iphlen > sizeof (struct ip)) {
960: ip_stripoptions(m, (struct mbuf *)0);
961: iphlen = sizeof(struct ip);
962: }
963:
964: /*
965: * Get IP and UDP header together in first mbuf.
966: */
967: ip = mtod(m, struct ip *);
968: if (m->m_len < iphlen + sizeof(struct udphdr)) {
969: if ((m = m_pullup(m, iphlen + sizeof(struct udphdr))) == 0) {
970: udpstat.udps_hdrops++;
971: return;
972: }
973: ip = mtod(m, struct ip *);
974: }
975: uh = (struct udphdr *)((caddr_t)ip + iphlen);
1.57 itojun 976:
977: /* destination port of 0 is illegal, based on RFC768. */
978: if (uh->uh_dport == 0)
979: goto bad;
1.1 cgd 980:
981: /*
982: * Make mbuf data length reflect UDP length.
983: * If not enough data to reflect UDP length, drop.
984: */
1.15 cgd 985: len = ntohs((u_int16_t)uh->uh_ulen);
1.47 mycroft 986: if (ip->ip_len != iphlen + len) {
1.70 sommerfe 987: if (ip->ip_len < iphlen + len || len < sizeof(struct udphdr)) {
1.1 cgd 988: udpstat.udps_badlen++;
989: goto bad;
990: }
1.47 mycroft 991: m_adj(m, iphlen + len - ip->ip_len);
1.1 cgd 992: }
993: /*
994: * Save a copy of the IP header in case we want restore it
995: * for sending an ICMP error message in response.
996: */
997: save_ip = *ip;
998:
999: /*
1000: * Checksum extended UDP header and data.
1001: */
1.29 mrg 1002: if (uh->uh_sum) {
1.78 thorpej 1003: switch (m->m_pkthdr.csum_flags &
1004: ((m->m_pkthdr.rcvif->if_csum_flags & M_CSUM_UDPv4) |
1005: M_CSUM_TCP_UDP_BAD | M_CSUM_DATA)) {
1006: case M_CSUM_UDPv4|M_CSUM_TCP_UDP_BAD:
1007: UDP_CSUM_COUNTER_INCR(&udp_hwcsum_bad);
1008: goto badcsum;
1009:
1010: case M_CSUM_UDPv4|M_CSUM_DATA:
1011: UDP_CSUM_COUNTER_INCR(&udp_hwcsum_data);
1012: if ((m->m_pkthdr.csum_data ^ 0xffff) != 0)
1013: goto badcsum;
1014: break;
1015:
1016: case M_CSUM_UDPv4:
1017: /* Checksum was okay. */
1018: UDP_CSUM_COUNTER_INCR(&udp_hwcsum_ok);
1019: break;
1020:
1021: default:
1022: /* Need to compute it ourselves. */
1023: UDP_CSUM_COUNTER_INCR(&udp_swcsum);
1024: bzero(((struct ipovly *)ip)->ih_x1,
1025: sizeof ((struct ipovly *)ip)->ih_x1);
1026: ((struct ipovly *)ip)->ih_len = uh->uh_ulen;
1027: if (in_cksum(m, len + sizeof (struct ip)) != 0)
1028: goto badcsum;
1029: break;
1.1 cgd 1030: }
1031: }
1.13 mycroft 1032:
1.48 itojun 1033: /*
1034: * Construct sockaddr format source address.
1035: */
1036: udpsrc.sin_family = AF_INET;
1037: udpsrc.sin_len = sizeof(struct sockaddr_in);
1038: udpsrc.sin_addr = ip->ip_src;
1039: udpsrc.sin_port = uh->uh_sport;
1040: bzero((caddr_t)udpsrc.sin_zero, sizeof(udpsrc.sin_zero));
1041:
1.16 mycroft 1042: if (IN_MULTICAST(ip->ip_dst.s_addr) ||
1.13 mycroft 1043: in_broadcast(ip->ip_dst, m->m_pkthdr.rcvif)) {
1.40 thorpej 1044: struct inpcb *last;
1.4 hpeyerl 1045: /*
1046: * Deliver a multicast or broadcast datagram to *all* sockets
1047: * for which the local and remote addresses and ports match
1048: * those of the incoming datagram. This allows more than
1049: * one process to receive multi/broadcasts on the same port.
1050: * (This really ought to be done for unicast datagrams as
1051: * well, but that would cause problems with existing
1052: * applications that open both address-specific sockets and
1053: * a wildcard socket listening to the same port -- they would
1054: * end up receiving duplicates of every unicast datagram.
1055: * Those applications open the multiple sockets to overcome an
1056: * inadequacy of the UDP socket interface, but for backwards
1057: * compatibility we avoid the problem here rather than
1.13 mycroft 1058: * fixing the interface. Maybe 4.5BSD will remedy this?)
1.4 hpeyerl 1059: */
1.13 mycroft 1060:
1.48 itojun 1061: iphlen += sizeof(struct udphdr);
1.4 hpeyerl 1062: /*
1.48 itojun 1063: * KAME note: usually we drop udpiphdr from mbuf here.
1.71 itojun 1064: * we need udpiphdr for IPsec processing so we do that later.
1.4 hpeyerl 1065: */
1066: /*
1067: * Locate pcb(s) for datagram.
1068: * (Algorithm copied from raw_intr().)
1069: */
1070: last = NULL;
1.22 cgd 1071: for (inp = udbtable.inpt_queue.cqh_first;
1072: inp != (struct inpcb *)&udbtable.inpt_queue;
1073: inp = inp->inp_queue.cqe_next) {
1.4 hpeyerl 1074: if (inp->inp_lport != uh->uh_dport)
1075: continue;
1.34 mycroft 1076: if (!in_nullhost(inp->inp_laddr)) {
1077: if (!in_hosteq(inp->inp_laddr, ip->ip_dst))
1.4 hpeyerl 1078: continue;
1079: }
1.34 mycroft 1080: if (!in_nullhost(inp->inp_faddr)) {
1081: if (!in_hosteq(inp->inp_faddr, ip->ip_src) ||
1.4 hpeyerl 1082: inp->inp_fport != uh->uh_sport)
1083: continue;
1084: }
1085:
1086: if (last != NULL) {
1087: struct mbuf *n;
1088:
1.48 itojun 1089: #ifdef IPSEC
1090: /* check AH/ESP integrity. */
1091: if (last != NULL && ipsec4_in_reject(m, last)) {
1092: ipsecstat.in_polvio++;
1093: /* do not inject data to pcb */
1094: } else
1095: #endif /*IPSEC*/
1.4 hpeyerl 1096: if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
1.40 thorpej 1097: if (last->inp_flags & INP_CONTROLOPTS
1098: || last->inp_socket->so_options &
1099: SO_TIMESTAMP) {
1100: ip_savecontrol(last, &opts,
1101: ip, n);
1102: }
1.49 drochner 1103: m_adj(n, iphlen);
1.48 itojun 1104: sa = (struct sockaddr *)&udpsrc;
1.40 thorpej 1105: if (sbappendaddr(
1106: &last->inp_socket->so_rcv,
1.48 itojun 1107: sa, n, opts) == 0) {
1.4 hpeyerl 1108: m_freem(n);
1.40 thorpej 1109: if (opts)
1110: m_freem(opts);
1.81 ! enami 1111: udpstat.udps_fullsock++;
1.13 mycroft 1112: } else
1.40 thorpej 1113: sorwakeup(last->inp_socket);
1114: opts = 0;
1.4 hpeyerl 1115: }
1116: }
1.40 thorpej 1117: last = inp;
1.4 hpeyerl 1118: /*
1.13 mycroft 1119: * Don't look for additional matches if this one does
1120: * not have either the SO_REUSEPORT or SO_REUSEADDR
1121: * socket options set. This heuristic avoids searching
1122: * through all pcbs in the common case of a non-shared
1123: * port. It * assumes that an application will never
1124: * clear these options after setting them.
1.4 hpeyerl 1125: */
1.40 thorpej 1126: if ((last->inp_socket->so_options &
1127: (SO_REUSEPORT|SO_REUSEADDR)) == 0)
1.4 hpeyerl 1128: break;
1129: }
1.6 mycroft 1130:
1.4 hpeyerl 1131: if (last == NULL) {
1132: /*
1133: * No matching pcb found; discard datagram.
1134: * (No need to send an ICMP Port Unreachable
1135: * for a broadcast or multicast datgram.)
1136: */
1.13 mycroft 1137: udpstat.udps_noportbcast++;
1.4 hpeyerl 1138: goto bad;
1139: }
1.48 itojun 1140: #ifdef IPSEC
1141: /* check AH/ESP integrity. */
1142: if (last != NULL && ipsec4_in_reject(m, last)) {
1143: ipsecstat.in_polvio++;
1144: goto bad;
1145: }
1146: #endif /*IPSEC*/
1.40 thorpej 1147: if (last->inp_flags & INP_CONTROLOPTS ||
1148: last->inp_socket->so_options & SO_TIMESTAMP)
1149: ip_savecontrol(last, &opts, ip, m);
1.49 drochner 1150: m->m_len -= iphlen;
1151: m->m_pkthdr.len -= iphlen;
1152: m->m_data += iphlen;
1.48 itojun 1153: sa = (struct sockaddr *)&udpsrc;
1154: if (sbappendaddr(&last->inp_socket->so_rcv, sa, m, opts) == 0) {
1.13 mycroft 1155: udpstat.udps_fullsock++;
1.4 hpeyerl 1156: goto bad;
1.13 mycroft 1157: }
1.40 thorpej 1158: sorwakeup(last->inp_socket);
1.4 hpeyerl 1159: return;
1160: }
1.1 cgd 1161: /*
1162: * Locate pcb for datagram.
1163: */
1.35 mycroft 1164: inp = in_pcblookup_connect(&udbtable, ip->ip_src, uh->uh_sport,
1.26 mycroft 1165: ip->ip_dst, uh->uh_dport);
1166: if (inp == 0) {
1167: ++udpstat.udps_pcbhashmiss;
1.35 mycroft 1168: inp = in_pcblookup_bind(&udbtable, ip->ip_dst, uh->uh_dport);
1.18 mycroft 1169: if (inp == 0) {
1170: if (m->m_flags & (M_BCAST | M_MCAST)) {
1171: udpstat.udps_noportbcast++;
1172: goto bad;
1173: }
1.61 itojun 1174: udpstat.udps_noport++;
1.18 mycroft 1175: *ip = save_ip;
1.64 ws 1176: #ifdef IPKDB
1.38 ws 1177: if (checkipkdb(&ip->ip_src,
1178: uh->uh_sport,
1179: uh->uh_dport,
1180: m,
1181: iphlen + sizeof(struct udphdr),
1182: len - sizeof(struct udphdr)))
1.37 ws 1183: /* It was a debugger connect packet, just drop it now */
1184: goto bad;
1185: #endif
1.18 mycroft 1186: icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0);
1187: return;
1.13 mycroft 1188: }
1.1 cgd 1189: }
1.48 itojun 1190: #ifdef IPSEC
1191: if (inp != NULL && ipsec4_in_reject(m, inp)) {
1192: ipsecstat.in_polvio++;
1193: goto bad;
1194: }
1195: #endif /*IPSEC*/
1.1 cgd 1196:
1197: /*
1198: * Stuff source address and datagram in user buffer.
1199: */
1.40 thorpej 1200: if (inp->inp_flags & INP_CONTROLOPTS ||
1201: inp->inp_socket->so_options & SO_TIMESTAMP)
1202: ip_savecontrol(inp, &opts, ip, m);
1.1 cgd 1203: iphlen += sizeof(struct udphdr);
1204: m->m_len -= iphlen;
1205: m->m_pkthdr.len -= iphlen;
1206: m->m_data += iphlen;
1.48 itojun 1207: sa = (struct sockaddr *)&udpsrc;
1208: if (sbappendaddr(&inp->inp_socket->so_rcv, sa, m, opts) == 0) {
1.1 cgd 1209: udpstat.udps_fullsock++;
1210: goto bad;
1211: }
1212: sorwakeup(inp->inp_socket);
1213: return;
1214: bad:
1215: m_freem(m);
1216: if (opts)
1217: m_freem(opts);
1.78 thorpej 1218: return;
1219:
1220: badcsum:
1221: udpstat.udps_badsum++;
1222: m_freem(m);
1.1 cgd 1223: }
1.56 itojun 1224: #endif /*UDP6*/
1.1 cgd 1225:
1.72 itojun 1226: #ifdef INET
1.1 cgd 1227: /*
1228: * Notify a udp user of an asynchronous error;
1229: * just wake up so that he can collect error status.
1230: */
1.7 mycroft 1231: static void
1.1 cgd 1232: udp_notify(inp, errno)
1.66 augustss 1233: struct inpcb *inp;
1.7 mycroft 1234: int errno;
1.1 cgd 1235: {
1.34 mycroft 1236:
1.1 cgd 1237: inp->inp_socket->so_error = errno;
1238: sorwakeup(inp->inp_socket);
1239: sowwakeup(inp->inp_socket);
1240: }
1241:
1.27 christos 1242: void *
1243: udp_ctlinput(cmd, sa, v)
1.1 cgd 1244: int cmd;
1245: struct sockaddr *sa;
1.27 christos 1246: void *v;
1.1 cgd 1247: {
1.66 augustss 1248: struct ip *ip = v;
1249: struct udphdr *uh;
1.18 mycroft 1250: void (*notify) __P((struct inpcb *, int)) = udp_notify;
1.21 mycroft 1251: int errno;
1.1 cgd 1252:
1.53 itojun 1253: if (sa->sa_family != AF_INET
1254: || sa->sa_len != sizeof(struct sockaddr_in))
1.51 itojun 1255: return NULL;
1.20 mycroft 1256: if ((unsigned)cmd >= PRC_NCMDS)
1.27 christos 1257: return NULL;
1.20 mycroft 1258: errno = inetctlerrmap[cmd];
1.18 mycroft 1259: if (PRC_IS_REDIRECT(cmd))
1.19 mycroft 1260: notify = in_rtchange, ip = 0;
1.18 mycroft 1261: else if (cmd == PRC_HOSTDEAD)
1.19 mycroft 1262: ip = 0;
1.23 cgd 1263: else if (errno == 0)
1.27 christos 1264: return NULL;
1.19 mycroft 1265: if (ip) {
1.1 cgd 1266: uh = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2));
1.34 mycroft 1267: in_pcbnotify(&udbtable, satosin(sa)->sin_addr, uh->uh_dport,
1268: ip->ip_src, uh->uh_sport, errno, notify);
1.53 itojun 1269:
1270: /* XXX mapped address case */
1.19 mycroft 1271: } else
1.34 mycroft 1272: in_pcbnotifyall(&udbtable, satosin(sa)->sin_addr, errno,
1273: notify);
1.27 christos 1274: return NULL;
1.1 cgd 1275: }
1276:
1.7 mycroft 1277: int
1.27 christos 1278: #if __STDC__
1279: udp_output(struct mbuf *m, ...)
1280: #else
1281: udp_output(m, va_alist)
1282: struct mbuf *m;
1283: va_dcl
1284: #endif
1285: {
1.66 augustss 1286: struct inpcb *inp;
1287: struct udpiphdr *ui;
1288: int len = m->m_pkthdr.len;
1.31 mycroft 1289: int error = 0;
1.27 christos 1290: va_list ap;
1291:
1292: va_start(ap, m);
1293: inp = va_arg(ap, struct inpcb *);
1294: va_end(ap);
1.1 cgd 1295:
1296: /*
1297: * Calculate data length and get a mbuf
1298: * for UDP and IP headers.
1299: */
1.13 mycroft 1300: M_PREPEND(m, sizeof(struct udpiphdr), M_DONTWAIT);
1301: if (m == 0) {
1302: error = ENOBUFS;
1.39 thorpej 1303: goto release;
1304: }
1305:
1306: /*
1307: * Compute the packet length of the IP header, and
1308: * punt if the length looks bogus.
1309: */
1310: if ((len + sizeof(struct udpiphdr)) > IP_MAXPACKET) {
1311: error = EMSGSIZE;
1.13 mycroft 1312: goto release;
1313: }
1.1 cgd 1314:
1315: /*
1316: * Fill in mbuf with extended UDP header
1317: * and addresses and length put into network format.
1318: */
1319: ui = mtod(m, struct udpiphdr *);
1320: ui->ui_pr = IPPROTO_UDP;
1321: ui->ui_src = inp->inp_laddr;
1322: ui->ui_dst = inp->inp_faddr;
1323: ui->ui_sport = inp->inp_lport;
1324: ui->ui_dport = inp->inp_fport;
1.78 thorpej 1325: ui->ui_ulen = htons((u_int16_t)len + sizeof(struct udphdr));
1.1 cgd 1326:
1327: /*
1.78 thorpej 1328: * Set up checksum and output datagram.
1.1 cgd 1329: */
1330: if (udpcksum) {
1.78 thorpej 1331: /*
1332: * XXX Cache pseudo-header checksum part for
1333: * XXX "connected" UDP sockets.
1334: */
1335: ui->ui_sum = in_cksum_phdr(ui->ui_src.s_addr,
1336: ui->ui_dst.s_addr, htons((u_int16_t)len +
1337: sizeof(struct udphdr) + IPPROTO_UDP));
1338: m->m_pkthdr.csum_flags = M_CSUM_UDPv4;
1339: m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum);
1340: } else
1341: ui->ui_sum = 0;
1.1 cgd 1342: ((struct ip *)ui)->ip_len = sizeof (struct udpiphdr) + len;
1343: ((struct ip *)ui)->ip_ttl = inp->inp_ip.ip_ttl; /* XXX */
1344: ((struct ip *)ui)->ip_tos = inp->inp_ip.ip_tos; /* XXX */
1345: udpstat.udps_opackets++;
1.48 itojun 1346:
1347: #ifdef IPSEC
1.75 itojun 1348: if (ipsec_setsocket(m, inp->inp_socket) != 0) {
1349: error = ENOBUFS;
1350: goto release;
1351: }
1.48 itojun 1352: #endif /*IPSEC*/
1353:
1.31 mycroft 1354: return (ip_output(m, inp->inp_options, &inp->inp_route,
1.12 mycroft 1355: inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST),
1.31 mycroft 1356: inp->inp_moptions));
1.1 cgd 1357:
1358: release:
1359: m_freem(m);
1360: return (error);
1361: }
1362:
1.42 thorpej 1363: int udp_sendspace = 9216; /* really max datagram size */
1364: int udp_recvspace = 40 * (1024 + sizeof(struct sockaddr_in));
1.1 cgd 1365: /* 40 1K datagrams */
1366:
1367: /*ARGSUSED*/
1.7 mycroft 1368: int
1.31 mycroft 1369: udp_usrreq(so, req, m, nam, control, p)
1.1 cgd 1370: struct socket *so;
1371: int req;
1.31 mycroft 1372: struct mbuf *m, *nam, *control;
1.30 mycroft 1373: struct proc *p;
1.1 cgd 1374: {
1.66 augustss 1375: struct inpcb *inp;
1.1 cgd 1376: int s;
1.66 augustss 1377: int error = 0;
1.1 cgd 1378:
1379: if (req == PRU_CONTROL)
1.31 mycroft 1380: return (in_control(so, (long)m, (caddr_t)nam,
1.30 mycroft 1381: (struct ifnet *)control, p));
1.59 thorpej 1382:
1.60 thorpej 1383: if (req == PRU_PURGEIF) {
1.80 itojun 1384: in_pcbpurgeif0(&udbtable, (struct ifnet *)control);
1.60 thorpej 1385: in_purgeif((struct ifnet *)control);
1386: in_pcbpurgeif(&udbtable, (struct ifnet *)control);
1.59 thorpej 1387: return (0);
1388: }
1.31 mycroft 1389:
1390: s = splsoftnet();
1391: inp = sotoinpcb(so);
1.32 mycroft 1392: #ifdef DIAGNOSTIC
1393: if (req != PRU_SEND && req != PRU_SENDOOB && control)
1394: panic("udp_usrreq: unexpected control mbuf");
1395: #endif
1.31 mycroft 1396: if (inp == 0 && req != PRU_ATTACH) {
1397: error = EINVAL;
1398: goto release;
1399: }
1400:
1.1 cgd 1401: /*
1402: * Note: need to block udp_input while changing
1403: * the udp pcb queue and/or pcb addresses.
1404: */
1405: switch (req) {
1406:
1407: case PRU_ATTACH:
1.31 mycroft 1408: if (inp != 0) {
1409: error = EISCONN;
1.1 cgd 1410: break;
1411: }
1.31 mycroft 1412: if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
1413: error = soreserve(so, udp_sendspace, udp_recvspace);
1414: if (error)
1415: break;
1416: }
1.18 mycroft 1417: error = in_pcballoc(so, &udbtable);
1.1 cgd 1418: if (error)
1419: break;
1.31 mycroft 1420: inp = sotoinpcb(so);
1421: inp->inp_ip.ip_ttl = ip_defttl;
1.48 itojun 1422: #ifdef IPSEC
1.58 itojun 1423: error = ipsec_init_policy(so, &inp->inp_sp);
1.53 itojun 1424: if (error != 0) {
1.52 itojun 1425: in_pcbdetach(inp);
1.53 itojun 1426: break;
1427: }
1.48 itojun 1428: #endif /*IPSEC*/
1.1 cgd 1429: break;
1430:
1431: case PRU_DETACH:
1.31 mycroft 1432: in_pcbdetach(inp);
1.1 cgd 1433: break;
1434:
1435: case PRU_BIND:
1.31 mycroft 1436: error = in_pcbbind(inp, nam, p);
1.1 cgd 1437: break;
1438:
1439: case PRU_LISTEN:
1440: error = EOPNOTSUPP;
1441: break;
1442:
1443: case PRU_CONNECT:
1.31 mycroft 1444: error = in_pcbconnect(inp, nam);
1445: if (error)
1.1 cgd 1446: break;
1.31 mycroft 1447: soisconnected(so);
1.1 cgd 1448: break;
1449:
1450: case PRU_CONNECT2:
1451: error = EOPNOTSUPP;
1452: break;
1453:
1454: case PRU_DISCONNECT:
1.31 mycroft 1455: /*soisdisconnected(so);*/
1456: so->so_state &= ~SS_ISCONNECTED; /* XXX */
1.1 cgd 1457: in_pcbdisconnect(inp);
1.34 mycroft 1458: inp->inp_laddr = zeroin_addr; /* XXX */
1.35 mycroft 1459: in_pcbstate(inp, INP_BOUND); /* XXX */
1.1 cgd 1460: break;
1461:
1462: case PRU_SHUTDOWN:
1463: socantsendmore(so);
1464: break;
1465:
1.31 mycroft 1466: case PRU_RCVD:
1467: error = EOPNOTSUPP;
1.1 cgd 1468: break;
1469:
1.31 mycroft 1470: case PRU_SEND:
1.32 mycroft 1471: if (control && control->m_len) {
1472: m_freem(control);
1473: m_freem(m);
1474: error = EINVAL;
1475: break;
1476: }
1.31 mycroft 1477: {
1.35 mycroft 1478: struct in_addr laddr; /* XXX */
1.1 cgd 1479:
1.31 mycroft 1480: if (nam) {
1.35 mycroft 1481: laddr = inp->inp_laddr; /* XXX */
1.31 mycroft 1482: if ((so->so_state & SS_ISCONNECTED) != 0) {
1483: error = EISCONN;
1.32 mycroft 1484: goto die;
1.31 mycroft 1485: }
1486: error = in_pcbconnect(inp, nam);
1.32 mycroft 1487: if (error) {
1488: die:
1489: m_freem(m);
1.31 mycroft 1490: break;
1.32 mycroft 1491: }
1.31 mycroft 1492: } else {
1493: if ((so->so_state & SS_ISCONNECTED) == 0) {
1494: error = ENOTCONN;
1.32 mycroft 1495: goto die;
1.31 mycroft 1496: }
1497: }
1.33 mycroft 1498: error = udp_output(m, inp);
1.31 mycroft 1499: if (nam) {
1500: in_pcbdisconnect(inp);
1.35 mycroft 1501: inp->inp_laddr = laddr; /* XXX */
1502: in_pcbstate(inp, INP_BOUND); /* XXX */
1.31 mycroft 1503: }
1504: }
1.1 cgd 1505: break;
1506:
1507: case PRU_SENSE:
1508: /*
1509: * stat: don't bother with a blocksize.
1510: */
1.31 mycroft 1511: splx(s);
1.1 cgd 1512: return (0);
1513:
1.31 mycroft 1514: case PRU_RCVOOB:
1515: error = EOPNOTSUPP;
1516: break;
1517:
1.1 cgd 1518: case PRU_SENDOOB:
1.32 mycroft 1519: m_freem(control);
1.31 mycroft 1520: m_freem(m);
1.1 cgd 1521: error = EOPNOTSUPP;
1522: break;
1523:
1.31 mycroft 1524: case PRU_SOCKADDR:
1525: in_setsockaddr(inp, nam);
1526: break;
1527:
1528: case PRU_PEERADDR:
1529: in_setpeeraddr(inp, nam);
1530: break;
1.1 cgd 1531:
1532: default:
1533: panic("udp_usrreq");
1534: }
1535:
1536: release:
1.31 mycroft 1537: splx(s);
1.1 cgd 1538: return (error);
1.13 mycroft 1539: }
1540:
1541: /*
1542: * Sysctl for udp variables.
1543: */
1.27 christos 1544: int
1.13 mycroft 1545: udp_sysctl(name, namelen, oldp, oldlenp, newp, newlen)
1546: int *name;
1547: u_int namelen;
1548: void *oldp;
1549: size_t *oldlenp;
1550: void *newp;
1551: size_t newlen;
1552: {
1553: /* All sysctl names at this level are terminal. */
1554: if (namelen != 1)
1555: return (ENOTDIR);
1556:
1557: switch (name[0]) {
1558: case UDPCTL_CHECKSUM:
1559: return (sysctl_int(oldp, oldlenp, newp, newlen, &udpcksum));
1.42 thorpej 1560: case UDPCTL_SENDSPACE:
1561: return (sysctl_int(oldp, oldlenp, newp, newlen,
1562: &udp_sendspace));
1563: case UDPCTL_RECVSPACE:
1564: return (sysctl_int(oldp, oldlenp, newp, newlen,
1565: &udp_recvspace));
1.13 mycroft 1566: default:
1567: return (ENOPROTOOPT);
1568: }
1569: /* NOTREACHED */
1.1 cgd 1570: }
1.72 itojun 1571: #endif
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