Annotation of src/sys/netinet/udp_usrreq.c, Revision 1.75.2.4
1.75.2.4! nathanw 1: /* $NetBSD: udp_usrreq.c,v 1.75.2.3 2001/09/21 22:36:51 nathanw 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:
1.75.2.1 nathanw 67: #include "opt_inet.h"
1.50 thorpej 68: #include "opt_ipsec.h"
1.75.2.1 nathanw 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:
1.75.2.1 nathanw 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:
1.75.2.1 nathanw 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
1.75.2.1 nathanw 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) {
1.75.2.1 nathanw 286: switch (m->m_pkthdr.csum_flags &
1.75.2.3 nathanw 287: ((m->m_pkthdr.rcvif->if_csum_flags_rx & M_CSUM_UDPv4) |
1.75.2.1 nathanw 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);
1.75.2.1 nathanw 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:
1.75.2.1 nathanw 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
1.75.2.1 nathanw 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);
1.75.2.2 nathanw 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);
1.75.2.2 nathanw 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: {
1.75.2.2 nathanw 726: u_int16_t sport, dport;
1.53 itojun 727: int rcvcnt;
1.75.2.2 nathanw 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:
1.75.2.2 nathanw 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:
1.75.2.2 nathanw 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) {
1.75.2.2 nathanw 774: if (in6p->in6p_lport != dport)
1.53 itojun 775: continue;
776: if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) {
1.75.2.2 nathanw 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: else {
1.75.2.2 nathanw 782: if (IN6_IS_ADDR_V4MAPPED(&dst6) &&
1.75.2.4! nathanw 783: (in6p->in6p_flags & IN6P_IPV6_V6ONLY))
1.55 itojun 784: continue;
785: }
1.53 itojun 786: if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
1.75.2.2 nathanw 787: if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr,
788: &src6) || in6p->in6p_fport != sport)
1.53 itojun 789: continue;
790: }
1.55 itojun 791: else {
1.75.2.2 nathanw 792: if (IN6_IS_ADDR_V4MAPPED(&src6) &&
1.75.2.4! nathanw 793: (in6p->in6p_flags & IN6P_IPV6_V6ONLY))
1.55 itojun 794: continue;
795: }
1.53 itojun 796:
797: last = in6p;
798: udp6_sendup(m, off, (struct sockaddr *)src,
799: in6p->in6p_socket);
800: rcvcnt++;
801:
802: /*
803: * Don't look for additional matches if this one does
804: * not have either the SO_REUSEPORT or SO_REUSEADDR
805: * socket options set. This heuristic avoids searching
806: * through all pcbs in the common case of a non-shared
807: * port. It assumes that an application will never
808: * clear these options after setting them.
809: */
810: if ((in6p->in6p_socket->so_options &
811: (SO_REUSEPORT|SO_REUSEADDR)) == 0)
812: break;
813: }
814: } else {
815: /*
816: * Locate pcb for datagram.
817: */
1.75.2.2 nathanw 818: in6p = in6_pcblookup_connect(&udb6, &src6, sport,
819: &dst6, dport, 0);
1.53 itojun 820: if (in6p == 0) {
821: ++udpstat.udps_pcbhashmiss;
1.75.2.2 nathanw 822: in6p = in6_pcblookup_bind(&udb6, &dst6, dport, 0);
823: if (in6p == 0)
1.53 itojun 824: return rcvcnt;
825: }
826:
827: udp6_sendup(m, off, (struct sockaddr *)src, in6p->in6p_socket);
828: rcvcnt++;
829: }
830:
831: bad:
832: return rcvcnt;
833: }
834: #endif
835:
1.56 itojun 836: #else /*UDP6*/
837:
1.53 itojun 838: void
839: #if __STDC__
840: udp_input(struct mbuf *m, ...)
841: #else
842: udp_input(m, va_alist)
843: struct mbuf *m;
844: va_dcl
845: #endif
846: {
1.48 itojun 847: int proto;
1.66 augustss 848: struct ip *ip;
849: struct udphdr *uh;
850: struct inpcb *inp;
1.1 cgd 851: struct mbuf *opts = 0;
852: int len;
853: struct ip save_ip;
1.27 christos 854: int iphlen;
855: va_list ap;
1.34 mycroft 856: struct sockaddr_in udpsrc;
1.48 itojun 857: struct sockaddr *sa;
1.27 christos 858:
859: va_start(ap, m);
860: iphlen = va_arg(ap, int);
1.48 itojun 861: proto = va_arg(ap, int);
1.27 christos 862: va_end(ap);
1.1 cgd 863:
864: udpstat.udps_ipackets++;
865:
866: /*
867: * Strip IP options, if any; should skip this,
868: * make available to user, and use on returned packets,
869: * but we don't yet have a way to check the checksum
870: * with options still present.
871: */
872: if (iphlen > sizeof (struct ip)) {
873: ip_stripoptions(m, (struct mbuf *)0);
874: iphlen = sizeof(struct ip);
875: }
876:
877: /*
878: * Get IP and UDP header together in first mbuf.
879: */
880: ip = mtod(m, struct ip *);
881: if (m->m_len < iphlen + sizeof(struct udphdr)) {
882: if ((m = m_pullup(m, iphlen + sizeof(struct udphdr))) == 0) {
883: udpstat.udps_hdrops++;
884: return;
885: }
886: ip = mtod(m, struct ip *);
887: }
888: uh = (struct udphdr *)((caddr_t)ip + iphlen);
1.57 itojun 889:
890: /* destination port of 0 is illegal, based on RFC768. */
891: if (uh->uh_dport == 0)
892: goto bad;
1.1 cgd 893:
894: /*
895: * Make mbuf data length reflect UDP length.
896: * If not enough data to reflect UDP length, drop.
897: */
1.15 cgd 898: len = ntohs((u_int16_t)uh->uh_ulen);
1.47 mycroft 899: if (ip->ip_len != iphlen + len) {
1.70 sommerfe 900: if (ip->ip_len < iphlen + len || len < sizeof(struct udphdr)) {
1.1 cgd 901: udpstat.udps_badlen++;
902: goto bad;
903: }
1.47 mycroft 904: m_adj(m, iphlen + len - ip->ip_len);
1.1 cgd 905: }
906: /*
907: * Save a copy of the IP header in case we want restore it
908: * for sending an ICMP error message in response.
909: */
910: save_ip = *ip;
911:
912: /*
913: * Checksum extended UDP header and data.
914: */
1.29 mrg 915: if (uh->uh_sum) {
1.75.2.1 nathanw 916: switch (m->m_pkthdr.csum_flags &
917: ((m->m_pkthdr.rcvif->if_csum_flags & M_CSUM_UDPv4) |
918: M_CSUM_TCP_UDP_BAD | M_CSUM_DATA)) {
919: case M_CSUM_UDPv4|M_CSUM_TCP_UDP_BAD:
920: UDP_CSUM_COUNTER_INCR(&udp_hwcsum_bad);
921: goto badcsum;
922:
923: case M_CSUM_UDPv4|M_CSUM_DATA:
924: UDP_CSUM_COUNTER_INCR(&udp_hwcsum_data);
925: if ((m->m_pkthdr.csum_data ^ 0xffff) != 0)
926: goto badcsum;
927: break;
928:
929: case M_CSUM_UDPv4:
930: /* Checksum was okay. */
931: UDP_CSUM_COUNTER_INCR(&udp_hwcsum_ok);
932: break;
933:
934: default:
935: /* Need to compute it ourselves. */
936: UDP_CSUM_COUNTER_INCR(&udp_swcsum);
937: bzero(((struct ipovly *)ip)->ih_x1,
938: sizeof ((struct ipovly *)ip)->ih_x1);
939: ((struct ipovly *)ip)->ih_len = uh->uh_ulen;
940: if (in_cksum(m, len + sizeof (struct ip)) != 0)
941: goto badcsum;
942: break;
1.1 cgd 943: }
944: }
1.13 mycroft 945:
1.48 itojun 946: /*
947: * Construct sockaddr format source address.
948: */
949: udpsrc.sin_family = AF_INET;
950: udpsrc.sin_len = sizeof(struct sockaddr_in);
951: udpsrc.sin_addr = ip->ip_src;
952: udpsrc.sin_port = uh->uh_sport;
953: bzero((caddr_t)udpsrc.sin_zero, sizeof(udpsrc.sin_zero));
954:
1.16 mycroft 955: if (IN_MULTICAST(ip->ip_dst.s_addr) ||
1.13 mycroft 956: in_broadcast(ip->ip_dst, m->m_pkthdr.rcvif)) {
1.40 thorpej 957: struct inpcb *last;
1.4 hpeyerl 958: /*
959: * Deliver a multicast or broadcast datagram to *all* sockets
960: * for which the local and remote addresses and ports match
961: * those of the incoming datagram. This allows more than
962: * one process to receive multi/broadcasts on the same port.
963: * (This really ought to be done for unicast datagrams as
964: * well, but that would cause problems with existing
965: * applications that open both address-specific sockets and
966: * a wildcard socket listening to the same port -- they would
967: * end up receiving duplicates of every unicast datagram.
968: * Those applications open the multiple sockets to overcome an
969: * inadequacy of the UDP socket interface, but for backwards
970: * compatibility we avoid the problem here rather than
1.13 mycroft 971: * fixing the interface. Maybe 4.5BSD will remedy this?)
1.4 hpeyerl 972: */
1.13 mycroft 973:
1.48 itojun 974: iphlen += sizeof(struct udphdr);
1.4 hpeyerl 975: /*
1.48 itojun 976: * KAME note: usually we drop udpiphdr from mbuf here.
1.71 itojun 977: * we need udpiphdr for IPsec processing so we do that later.
1.4 hpeyerl 978: */
979: /*
980: * Locate pcb(s) for datagram.
981: * (Algorithm copied from raw_intr().)
982: */
983: last = NULL;
1.22 cgd 984: for (inp = udbtable.inpt_queue.cqh_first;
985: inp != (struct inpcb *)&udbtable.inpt_queue;
986: inp = inp->inp_queue.cqe_next) {
1.4 hpeyerl 987: if (inp->inp_lport != uh->uh_dport)
988: continue;
1.34 mycroft 989: if (!in_nullhost(inp->inp_laddr)) {
990: if (!in_hosteq(inp->inp_laddr, ip->ip_dst))
1.4 hpeyerl 991: continue;
992: }
1.34 mycroft 993: if (!in_nullhost(inp->inp_faddr)) {
994: if (!in_hosteq(inp->inp_faddr, ip->ip_src) ||
1.4 hpeyerl 995: inp->inp_fport != uh->uh_sport)
996: continue;
997: }
998:
999: if (last != NULL) {
1000: struct mbuf *n;
1001:
1.48 itojun 1002: #ifdef IPSEC
1003: /* check AH/ESP integrity. */
1004: if (last != NULL && ipsec4_in_reject(m, last)) {
1005: ipsecstat.in_polvio++;
1006: /* do not inject data to pcb */
1007: } else
1008: #endif /*IPSEC*/
1.4 hpeyerl 1009: if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
1.40 thorpej 1010: if (last->inp_flags & INP_CONTROLOPTS
1011: || last->inp_socket->so_options &
1012: SO_TIMESTAMP) {
1013: ip_savecontrol(last, &opts,
1014: ip, n);
1015: }
1.49 drochner 1016: m_adj(n, iphlen);
1.48 itojun 1017: sa = (struct sockaddr *)&udpsrc;
1.40 thorpej 1018: if (sbappendaddr(
1019: &last->inp_socket->so_rcv,
1.48 itojun 1020: sa, n, opts) == 0) {
1.4 hpeyerl 1021: m_freem(n);
1.40 thorpej 1022: if (opts)
1023: m_freem(opts);
1.75.2.2 nathanw 1024: udpstat.udps_fullsock++;
1.13 mycroft 1025: } else
1.40 thorpej 1026: sorwakeup(last->inp_socket);
1027: opts = 0;
1.4 hpeyerl 1028: }
1029: }
1.40 thorpej 1030: last = inp;
1.4 hpeyerl 1031: /*
1.13 mycroft 1032: * Don't look for additional matches if this one does
1033: * not have either the SO_REUSEPORT or SO_REUSEADDR
1034: * socket options set. This heuristic avoids searching
1035: * through all pcbs in the common case of a non-shared
1036: * port. It * assumes that an application will never
1037: * clear these options after setting them.
1.4 hpeyerl 1038: */
1.40 thorpej 1039: if ((last->inp_socket->so_options &
1040: (SO_REUSEPORT|SO_REUSEADDR)) == 0)
1.4 hpeyerl 1041: break;
1042: }
1.6 mycroft 1043:
1.4 hpeyerl 1044: if (last == NULL) {
1045: /*
1046: * No matching pcb found; discard datagram.
1047: * (No need to send an ICMP Port Unreachable
1048: * for a broadcast or multicast datgram.)
1049: */
1.13 mycroft 1050: udpstat.udps_noportbcast++;
1.4 hpeyerl 1051: goto bad;
1052: }
1.48 itojun 1053: #ifdef IPSEC
1054: /* check AH/ESP integrity. */
1055: if (last != NULL && ipsec4_in_reject(m, last)) {
1056: ipsecstat.in_polvio++;
1057: goto bad;
1058: }
1059: #endif /*IPSEC*/
1.40 thorpej 1060: if (last->inp_flags & INP_CONTROLOPTS ||
1061: last->inp_socket->so_options & SO_TIMESTAMP)
1062: ip_savecontrol(last, &opts, ip, m);
1.49 drochner 1063: m->m_len -= iphlen;
1064: m->m_pkthdr.len -= iphlen;
1065: m->m_data += iphlen;
1.48 itojun 1066: sa = (struct sockaddr *)&udpsrc;
1067: if (sbappendaddr(&last->inp_socket->so_rcv, sa, m, opts) == 0) {
1.13 mycroft 1068: udpstat.udps_fullsock++;
1.4 hpeyerl 1069: goto bad;
1.13 mycroft 1070: }
1.40 thorpej 1071: sorwakeup(last->inp_socket);
1.4 hpeyerl 1072: return;
1073: }
1.1 cgd 1074: /*
1075: * Locate pcb for datagram.
1076: */
1.35 mycroft 1077: inp = in_pcblookup_connect(&udbtable, ip->ip_src, uh->uh_sport,
1.26 mycroft 1078: ip->ip_dst, uh->uh_dport);
1079: if (inp == 0) {
1080: ++udpstat.udps_pcbhashmiss;
1.35 mycroft 1081: inp = in_pcblookup_bind(&udbtable, ip->ip_dst, uh->uh_dport);
1.18 mycroft 1082: if (inp == 0) {
1083: if (m->m_flags & (M_BCAST | M_MCAST)) {
1084: udpstat.udps_noportbcast++;
1085: goto bad;
1086: }
1.61 itojun 1087: udpstat.udps_noport++;
1.18 mycroft 1088: *ip = save_ip;
1.64 ws 1089: #ifdef IPKDB
1.38 ws 1090: if (checkipkdb(&ip->ip_src,
1091: uh->uh_sport,
1092: uh->uh_dport,
1093: m,
1094: iphlen + sizeof(struct udphdr),
1095: len - sizeof(struct udphdr)))
1.37 ws 1096: /* It was a debugger connect packet, just drop it now */
1097: goto bad;
1098: #endif
1.18 mycroft 1099: icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0);
1100: return;
1.13 mycroft 1101: }
1.1 cgd 1102: }
1.48 itojun 1103: #ifdef IPSEC
1104: if (inp != NULL && ipsec4_in_reject(m, inp)) {
1105: ipsecstat.in_polvio++;
1106: goto bad;
1107: }
1108: #endif /*IPSEC*/
1.1 cgd 1109:
1110: /*
1111: * Stuff source address and datagram in user buffer.
1112: */
1.40 thorpej 1113: if (inp->inp_flags & INP_CONTROLOPTS ||
1114: inp->inp_socket->so_options & SO_TIMESTAMP)
1115: ip_savecontrol(inp, &opts, ip, m);
1.1 cgd 1116: iphlen += sizeof(struct udphdr);
1117: m->m_len -= iphlen;
1118: m->m_pkthdr.len -= iphlen;
1119: m->m_data += iphlen;
1.48 itojun 1120: sa = (struct sockaddr *)&udpsrc;
1121: if (sbappendaddr(&inp->inp_socket->so_rcv, sa, m, opts) == 0) {
1.1 cgd 1122: udpstat.udps_fullsock++;
1123: goto bad;
1124: }
1125: sorwakeup(inp->inp_socket);
1126: return;
1127: bad:
1128: m_freem(m);
1129: if (opts)
1130: m_freem(opts);
1.75.2.1 nathanw 1131: return;
1132:
1133: badcsum:
1134: udpstat.udps_badsum++;
1135: m_freem(m);
1.1 cgd 1136: }
1.56 itojun 1137: #endif /*UDP6*/
1.1 cgd 1138:
1.72 itojun 1139: #ifdef INET
1.1 cgd 1140: /*
1141: * Notify a udp user of an asynchronous error;
1142: * just wake up so that he can collect error status.
1143: */
1.7 mycroft 1144: static void
1.1 cgd 1145: udp_notify(inp, errno)
1.66 augustss 1146: struct inpcb *inp;
1.7 mycroft 1147: int errno;
1.1 cgd 1148: {
1.34 mycroft 1149:
1.1 cgd 1150: inp->inp_socket->so_error = errno;
1151: sorwakeup(inp->inp_socket);
1152: sowwakeup(inp->inp_socket);
1153: }
1154:
1.27 christos 1155: void *
1156: udp_ctlinput(cmd, sa, v)
1.1 cgd 1157: int cmd;
1158: struct sockaddr *sa;
1.27 christos 1159: void *v;
1.1 cgd 1160: {
1.66 augustss 1161: struct ip *ip = v;
1162: struct udphdr *uh;
1.18 mycroft 1163: void (*notify) __P((struct inpcb *, int)) = udp_notify;
1.21 mycroft 1164: int errno;
1.1 cgd 1165:
1.53 itojun 1166: if (sa->sa_family != AF_INET
1167: || sa->sa_len != sizeof(struct sockaddr_in))
1.51 itojun 1168: return NULL;
1.20 mycroft 1169: if ((unsigned)cmd >= PRC_NCMDS)
1.27 christos 1170: return NULL;
1.20 mycroft 1171: errno = inetctlerrmap[cmd];
1.18 mycroft 1172: if (PRC_IS_REDIRECT(cmd))
1.19 mycroft 1173: notify = in_rtchange, ip = 0;
1.18 mycroft 1174: else if (cmd == PRC_HOSTDEAD)
1.19 mycroft 1175: ip = 0;
1.23 cgd 1176: else if (errno == 0)
1.27 christos 1177: return NULL;
1.19 mycroft 1178: if (ip) {
1.1 cgd 1179: uh = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2));
1.34 mycroft 1180: in_pcbnotify(&udbtable, satosin(sa)->sin_addr, uh->uh_dport,
1181: ip->ip_src, uh->uh_sport, errno, notify);
1.53 itojun 1182:
1183: /* XXX mapped address case */
1.19 mycroft 1184: } else
1.34 mycroft 1185: in_pcbnotifyall(&udbtable, satosin(sa)->sin_addr, errno,
1186: notify);
1.27 christos 1187: return NULL;
1.1 cgd 1188: }
1189:
1.7 mycroft 1190: int
1.27 christos 1191: #if __STDC__
1192: udp_output(struct mbuf *m, ...)
1193: #else
1194: udp_output(m, va_alist)
1195: struct mbuf *m;
1196: va_dcl
1197: #endif
1198: {
1.66 augustss 1199: struct inpcb *inp;
1200: struct udpiphdr *ui;
1201: int len = m->m_pkthdr.len;
1.31 mycroft 1202: int error = 0;
1.27 christos 1203: va_list ap;
1204:
1205: va_start(ap, m);
1206: inp = va_arg(ap, struct inpcb *);
1207: va_end(ap);
1.1 cgd 1208:
1209: /*
1210: * Calculate data length and get a mbuf
1211: * for UDP and IP headers.
1212: */
1.13 mycroft 1213: M_PREPEND(m, sizeof(struct udpiphdr), M_DONTWAIT);
1214: if (m == 0) {
1215: error = ENOBUFS;
1.39 thorpej 1216: goto release;
1217: }
1218:
1219: /*
1220: * Compute the packet length of the IP header, and
1221: * punt if the length looks bogus.
1222: */
1223: if ((len + sizeof(struct udpiphdr)) > IP_MAXPACKET) {
1224: error = EMSGSIZE;
1.13 mycroft 1225: goto release;
1226: }
1.1 cgd 1227:
1228: /*
1229: * Fill in mbuf with extended UDP header
1230: * and addresses and length put into network format.
1231: */
1232: ui = mtod(m, struct udpiphdr *);
1233: ui->ui_pr = IPPROTO_UDP;
1234: ui->ui_src = inp->inp_laddr;
1235: ui->ui_dst = inp->inp_faddr;
1236: ui->ui_sport = inp->inp_lport;
1237: ui->ui_dport = inp->inp_fport;
1.75.2.1 nathanw 1238: ui->ui_ulen = htons((u_int16_t)len + sizeof(struct udphdr));
1.1 cgd 1239:
1240: /*
1.75.2.1 nathanw 1241: * Set up checksum and output datagram.
1.1 cgd 1242: */
1243: if (udpcksum) {
1.75.2.1 nathanw 1244: /*
1245: * XXX Cache pseudo-header checksum part for
1246: * XXX "connected" UDP sockets.
1247: */
1248: ui->ui_sum = in_cksum_phdr(ui->ui_src.s_addr,
1249: ui->ui_dst.s_addr, htons((u_int16_t)len +
1250: sizeof(struct udphdr) + IPPROTO_UDP));
1251: m->m_pkthdr.csum_flags = M_CSUM_UDPv4;
1252: m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum);
1253: } else
1254: ui->ui_sum = 0;
1.1 cgd 1255: ((struct ip *)ui)->ip_len = sizeof (struct udpiphdr) + len;
1256: ((struct ip *)ui)->ip_ttl = inp->inp_ip.ip_ttl; /* XXX */
1257: ((struct ip *)ui)->ip_tos = inp->inp_ip.ip_tos; /* XXX */
1258: udpstat.udps_opackets++;
1.48 itojun 1259:
1260: #ifdef IPSEC
1.75 itojun 1261: if (ipsec_setsocket(m, inp->inp_socket) != 0) {
1262: error = ENOBUFS;
1263: goto release;
1264: }
1.48 itojun 1265: #endif /*IPSEC*/
1266:
1.31 mycroft 1267: return (ip_output(m, inp->inp_options, &inp->inp_route,
1.12 mycroft 1268: inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST),
1.31 mycroft 1269: inp->inp_moptions));
1.1 cgd 1270:
1271: release:
1272: m_freem(m);
1273: return (error);
1274: }
1275:
1.42 thorpej 1276: int udp_sendspace = 9216; /* really max datagram size */
1277: int udp_recvspace = 40 * (1024 + sizeof(struct sockaddr_in));
1.1 cgd 1278: /* 40 1K datagrams */
1279:
1280: /*ARGSUSED*/
1.7 mycroft 1281: int
1.31 mycroft 1282: udp_usrreq(so, req, m, nam, control, p)
1.1 cgd 1283: struct socket *so;
1284: int req;
1.31 mycroft 1285: struct mbuf *m, *nam, *control;
1.30 mycroft 1286: struct proc *p;
1.1 cgd 1287: {
1.66 augustss 1288: struct inpcb *inp;
1.1 cgd 1289: int s;
1.66 augustss 1290: int error = 0;
1.1 cgd 1291:
1292: if (req == PRU_CONTROL)
1.31 mycroft 1293: return (in_control(so, (long)m, (caddr_t)nam,
1.30 mycroft 1294: (struct ifnet *)control, p));
1.59 thorpej 1295:
1.60 thorpej 1296: if (req == PRU_PURGEIF) {
1.75.2.2 nathanw 1297: in_pcbpurgeif0(&udbtable, (struct ifnet *)control);
1.60 thorpej 1298: in_purgeif((struct ifnet *)control);
1299: in_pcbpurgeif(&udbtable, (struct ifnet *)control);
1.59 thorpej 1300: return (0);
1301: }
1.31 mycroft 1302:
1303: s = splsoftnet();
1304: inp = sotoinpcb(so);
1.32 mycroft 1305: #ifdef DIAGNOSTIC
1306: if (req != PRU_SEND && req != PRU_SENDOOB && control)
1307: panic("udp_usrreq: unexpected control mbuf");
1308: #endif
1.31 mycroft 1309: if (inp == 0 && req != PRU_ATTACH) {
1310: error = EINVAL;
1311: goto release;
1312: }
1313:
1.1 cgd 1314: /*
1315: * Note: need to block udp_input while changing
1316: * the udp pcb queue and/or pcb addresses.
1317: */
1318: switch (req) {
1319:
1320: case PRU_ATTACH:
1.31 mycroft 1321: if (inp != 0) {
1322: error = EISCONN;
1.1 cgd 1323: break;
1324: }
1.31 mycroft 1325: if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
1326: error = soreserve(so, udp_sendspace, udp_recvspace);
1327: if (error)
1328: break;
1329: }
1.18 mycroft 1330: error = in_pcballoc(so, &udbtable);
1.1 cgd 1331: if (error)
1332: break;
1.31 mycroft 1333: inp = sotoinpcb(so);
1334: inp->inp_ip.ip_ttl = ip_defttl;
1.1 cgd 1335: break;
1336:
1337: case PRU_DETACH:
1.31 mycroft 1338: in_pcbdetach(inp);
1.1 cgd 1339: break;
1340:
1341: case PRU_BIND:
1.31 mycroft 1342: error = in_pcbbind(inp, nam, p);
1.1 cgd 1343: break;
1344:
1345: case PRU_LISTEN:
1346: error = EOPNOTSUPP;
1347: break;
1348:
1349: case PRU_CONNECT:
1.31 mycroft 1350: error = in_pcbconnect(inp, nam);
1351: if (error)
1.1 cgd 1352: break;
1.31 mycroft 1353: soisconnected(so);
1.1 cgd 1354: break;
1355:
1356: case PRU_CONNECT2:
1357: error = EOPNOTSUPP;
1358: break;
1359:
1360: case PRU_DISCONNECT:
1.31 mycroft 1361: /*soisdisconnected(so);*/
1362: so->so_state &= ~SS_ISCONNECTED; /* XXX */
1.1 cgd 1363: in_pcbdisconnect(inp);
1.34 mycroft 1364: inp->inp_laddr = zeroin_addr; /* XXX */
1.35 mycroft 1365: in_pcbstate(inp, INP_BOUND); /* XXX */
1.1 cgd 1366: break;
1367:
1368: case PRU_SHUTDOWN:
1369: socantsendmore(so);
1370: break;
1371:
1.31 mycroft 1372: case PRU_RCVD:
1373: error = EOPNOTSUPP;
1.1 cgd 1374: break;
1375:
1.31 mycroft 1376: case PRU_SEND:
1.32 mycroft 1377: if (control && control->m_len) {
1378: m_freem(control);
1379: m_freem(m);
1380: error = EINVAL;
1381: break;
1382: }
1.31 mycroft 1383: {
1.35 mycroft 1384: struct in_addr laddr; /* XXX */
1.1 cgd 1385:
1.31 mycroft 1386: if (nam) {
1.35 mycroft 1387: laddr = inp->inp_laddr; /* XXX */
1.31 mycroft 1388: if ((so->so_state & SS_ISCONNECTED) != 0) {
1389: error = EISCONN;
1.32 mycroft 1390: goto die;
1.31 mycroft 1391: }
1392: error = in_pcbconnect(inp, nam);
1.32 mycroft 1393: if (error) {
1394: die:
1395: m_freem(m);
1.31 mycroft 1396: break;
1.32 mycroft 1397: }
1.31 mycroft 1398: } else {
1399: if ((so->so_state & SS_ISCONNECTED) == 0) {
1400: error = ENOTCONN;
1.32 mycroft 1401: goto die;
1.31 mycroft 1402: }
1403: }
1.33 mycroft 1404: error = udp_output(m, inp);
1.31 mycroft 1405: if (nam) {
1406: in_pcbdisconnect(inp);
1.35 mycroft 1407: inp->inp_laddr = laddr; /* XXX */
1408: in_pcbstate(inp, INP_BOUND); /* XXX */
1.31 mycroft 1409: }
1410: }
1.1 cgd 1411: break;
1412:
1413: case PRU_SENSE:
1414: /*
1415: * stat: don't bother with a blocksize.
1416: */
1.31 mycroft 1417: splx(s);
1.1 cgd 1418: return (0);
1419:
1.31 mycroft 1420: case PRU_RCVOOB:
1421: error = EOPNOTSUPP;
1422: break;
1423:
1.1 cgd 1424: case PRU_SENDOOB:
1.32 mycroft 1425: m_freem(control);
1.31 mycroft 1426: m_freem(m);
1.1 cgd 1427: error = EOPNOTSUPP;
1428: break;
1429:
1.31 mycroft 1430: case PRU_SOCKADDR:
1431: in_setsockaddr(inp, nam);
1432: break;
1433:
1434: case PRU_PEERADDR:
1435: in_setpeeraddr(inp, nam);
1436: break;
1.1 cgd 1437:
1438: default:
1439: panic("udp_usrreq");
1440: }
1441:
1442: release:
1.31 mycroft 1443: splx(s);
1.1 cgd 1444: return (error);
1.13 mycroft 1445: }
1446:
1447: /*
1448: * Sysctl for udp variables.
1449: */
1.27 christos 1450: int
1.13 mycroft 1451: udp_sysctl(name, namelen, oldp, oldlenp, newp, newlen)
1452: int *name;
1453: u_int namelen;
1454: void *oldp;
1455: size_t *oldlenp;
1456: void *newp;
1457: size_t newlen;
1458: {
1459: /* All sysctl names at this level are terminal. */
1460: if (namelen != 1)
1461: return (ENOTDIR);
1462:
1463: switch (name[0]) {
1464: case UDPCTL_CHECKSUM:
1465: return (sysctl_int(oldp, oldlenp, newp, newlen, &udpcksum));
1.42 thorpej 1466: case UDPCTL_SENDSPACE:
1467: return (sysctl_int(oldp, oldlenp, newp, newlen,
1468: &udp_sendspace));
1469: case UDPCTL_RECVSPACE:
1470: return (sysctl_int(oldp, oldlenp, newp, newlen,
1471: &udp_recvspace));
1.13 mycroft 1472: default:
1473: return (ENOPROTOOPT);
1474: }
1475: /* NOTREACHED */
1.1 cgd 1476: }
1.72 itojun 1477: #endif
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