Annotation of src/sys/netinet/udp_usrreq.c, Revision 1.68
1.68 ! itojun 1: /* $NetBSD: udp_usrreq.c,v 1.67 2000/06/28 03:01:17 mrg Exp $ */
1.48 itojun 2:
3: /*
4: * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
5: * All rights reserved.
6: *
7: * Redistribution and use in source and binary forms, with or without
8: * modification, are permitted provided that the following conditions
9: * are met:
10: * 1. Redistributions of source code must retain the above copyright
11: * notice, this list of conditions and the following disclaimer.
12: * 2. Redistributions in binary form must reproduce the above copyright
13: * notice, this list of conditions and the following disclaimer in the
14: * documentation and/or other materials provided with the distribution.
15: * 3. Neither the name of the project nor the names of its contributors
16: * may be used to endorse or promote products derived from this software
17: * without specific prior written permission.
18: *
19: * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
20: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22: * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
23: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29: * SUCH DAMAGE.
30: */
1.14 cgd 31:
1.1 cgd 32: /*
1.44 thorpej 33: * Copyright (c) 1982, 1986, 1988, 1990, 1993, 1995
1.13 mycroft 34: * The Regents of the University of California. All rights reserved.
1.1 cgd 35: *
36: * Redistribution and use in source and binary forms, with or without
37: * modification, are permitted provided that the following conditions
38: * are met:
39: * 1. Redistributions of source code must retain the above copyright
40: * notice, this list of conditions and the following disclaimer.
41: * 2. Redistributions in binary form must reproduce the above copyright
42: * notice, this list of conditions and the following disclaimer in the
43: * documentation and/or other materials provided with the distribution.
44: * 3. All advertising materials mentioning features or use of this software
45: * must display the following acknowledgement:
46: * This product includes software developed by the University of
47: * California, Berkeley and its contributors.
48: * 4. Neither the name of the University nor the names of its contributors
49: * may be used to endorse or promote products derived from this software
50: * without specific prior written permission.
51: *
52: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
53: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
54: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
55: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
56: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
57: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
58: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
59: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
60: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
61: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
62: * SUCH DAMAGE.
63: *
1.44 thorpej 64: * @(#)udp_usrreq.c 8.6 (Berkeley) 5/23/95
1.1 cgd 65: */
1.50 thorpej 66:
67: #include "opt_ipsec.h"
1.64 ws 68: #include "opt_ipkdb.h"
1.1 cgd 69:
1.5 mycroft 70: #include <sys/param.h>
71: #include <sys/malloc.h>
72: #include <sys/mbuf.h>
73: #include <sys/protosw.h>
74: #include <sys/socket.h>
75: #include <sys/socketvar.h>
1.13 mycroft 76: #include <sys/errno.h>
1.5 mycroft 77: #include <sys/stat.h>
1.27 christos 78: #include <sys/systm.h>
79: #include <sys/proc.h>
1.53 itojun 80: #include <sys/domain.h>
1.27 christos 81:
1.67 mrg 82: #include <uvm/uvm_extern.h>
1.27 christos 83: #include <sys/sysctl.h>
1.1 cgd 84:
1.5 mycroft 85: #include <net/if.h>
86: #include <net/route.h>
1.1 cgd 87:
1.5 mycroft 88: #include <netinet/in.h>
89: #include <netinet/in_systm.h>
1.15 cgd 90: #include <netinet/in_var.h>
1.5 mycroft 91: #include <netinet/ip.h>
92: #include <netinet/in_pcb.h>
93: #include <netinet/ip_var.h>
94: #include <netinet/ip_icmp.h>
95: #include <netinet/udp.h>
96: #include <netinet/udp_var.h>
1.1 cgd 97:
1.53 itojun 98: #ifdef INET6
99: #include <netinet/ip6.h>
100: #include <netinet/icmp6.h>
101: #include <netinet6/ip6_var.h>
102: #include <netinet6/in6_pcb.h>
103: #include <netinet6/udp6_var.h>
104: #endif
105:
106: #ifdef PULLDOWN_TEST
107: #ifndef INET6
108: /* always need ip6.h for IP6_EXTHDR_GET */
109: #include <netinet/ip6.h>
110: #endif
111: #endif
112:
1.27 christos 113: #include <machine/stdarg.h>
114:
1.48 itojun 115: #ifdef IPSEC
116: #include <netinet6/ipsec.h>
117: #include <netkey/key.h>
118: #endif /*IPSEC*/
119:
1.64 ws 120: #ifdef IPKDB
121: #include <ipkdb/ipkdb.h>
122: #endif
123:
1.8 mycroft 124: /*
125: * UDP protocol implementation.
126: * Per RFC 768, August, 1980.
127: */
128: #ifndef COMPAT_42
129: int udpcksum = 1;
130: #else
131: int udpcksum = 0; /* XXX */
132: #endif
133:
1.53 itojun 134: static void udp4_sendup __P((struct mbuf *, int, struct sockaddr *,
135: struct socket *));
136: static int udp4_realinput __P((struct sockaddr_in *, struct sockaddr_in *,
137: struct mbuf *, int));
138: #ifdef INET6
139: static void udp6_sendup __P((struct mbuf *, int, struct sockaddr *,
140: struct socket *));
141: static int in6_mcmatch __P((struct in6pcb *, struct in6_addr *,
142: struct ifnet *));
143: static int udp6_realinput __P((int, struct sockaddr_in6 *,
144: struct sockaddr_in6 *, struct mbuf *, int));
145: #endif
1.13 mycroft 146: static void udp_notify __P((struct inpcb *, int));
1.7 mycroft 147:
1.26 mycroft 148: #ifndef UDBHASHSIZE
149: #define UDBHASHSIZE 128
150: #endif
151: int udbhashsize = UDBHASHSIZE;
152:
1.7 mycroft 153: void
1.1 cgd 154: udp_init()
155: {
1.18 mycroft 156:
1.35 mycroft 157: in_pcbinit(&udbtable, udbhashsize, udbhashsize);
1.1 cgd 158: }
159:
1.56 itojun 160: #ifndef UDP6
1.7 mycroft 161: void
1.27 christos 162: #if __STDC__
163: udp_input(struct mbuf *m, ...)
164: #else
165: udp_input(m, va_alist)
166: struct mbuf *m;
167: va_dcl
168: #endif
1.1 cgd 169: {
1.53 itojun 170: va_list ap;
171: struct sockaddr_in src, dst;
172: struct ip *ip;
173: struct udphdr *uh;
174: int iphlen, proto;
175: int len;
176: int n;
177:
178: va_start(ap, m);
179: iphlen = va_arg(ap, int);
180: proto = va_arg(ap, int);
181: va_end(ap);
182:
183: udpstat.udps_ipackets++;
184:
185: #ifndef PULLDOWN_TEST
186: /*
187: * Strip IP options, if any; should skip this,
188: * make available to user, and use on returned packets,
189: * but we don't yet have a way to check the checksum
190: * with options still present.
191: */
192: if (iphlen > sizeof (struct ip)) {
193: ip_stripoptions(m, (struct mbuf *)0);
194: iphlen = sizeof(struct ip);
195: }
196: #else
197: /*
198: * we may enable the above code if we save and pass IPv4 options
199: * to the userland.
200: */
201: #endif
202:
203: /*
204: * Get IP and UDP header together in first mbuf.
205: */
206: ip = mtod(m, struct ip *);
207: #ifndef PULLDOWN_TEST
208: if (m->m_len < iphlen + sizeof(struct udphdr)) {
209: if ((m = m_pullup(m, iphlen + sizeof(struct udphdr))) == 0) {
210: udpstat.udps_hdrops++;
211: return;
212: }
213: ip = mtod(m, struct ip *);
214: }
215: uh = (struct udphdr *)((caddr_t)ip + iphlen);
216: #else
217: IP6_EXTHDR_GET(uh, struct udphdr *, m, iphlen, sizeof(struct udphdr));
218: if (uh == NULL) {
219: udpstat.udps_hdrops++;
220: return;
221: }
222: #endif
223:
1.57 itojun 224: /* destination port of 0 is illegal, based on RFC768. */
225: if (uh->uh_dport == 0)
226: goto bad;
227:
1.53 itojun 228: /*
229: * Make mbuf data length reflect UDP length.
230: * If not enough data to reflect UDP length, drop.
231: */
232: len = ntohs((u_int16_t)uh->uh_ulen);
233: if (ip->ip_len != iphlen + len) {
234: if (ip->ip_len < iphlen + len) {
235: udpstat.udps_badlen++;
236: goto bad;
237: }
238: m_adj(m, iphlen + len - ip->ip_len);
239: }
240:
241: /*
242: * Checksum extended UDP header and data.
243: */
244: if (uh->uh_sum) {
245: if (in4_cksum(m, IPPROTO_UDP, iphlen, len) != 0) {
246: udpstat.udps_badsum++;
247: m_freem(m);
248: return;
249: }
250: }
251:
252: /* construct source and dst sockaddrs. */
253: bzero(&src, sizeof(src));
254: src.sin_family = AF_INET;
255: src.sin_len = sizeof(struct sockaddr_in);
256: bcopy(&ip->ip_src, &src.sin_addr, sizeof(src.sin_addr));
257: src.sin_port = uh->uh_sport;
258: bzero(&dst, sizeof(dst));
259: dst.sin_family = AF_INET;
260: dst.sin_len = sizeof(struct sockaddr_in);
261: bcopy(&ip->ip_dst, &dst.sin_addr, sizeof(dst.sin_addr));
262: dst.sin_port = uh->uh_dport;
263:
264: n = udp4_realinput(&src, &dst, m, iphlen);
265: #ifdef INET6
266: if (IN_MULTICAST(ip->ip_dst.s_addr) || n == 0) {
267: struct sockaddr_in6 src6, dst6;
268:
269: bzero(&src6, sizeof(src6));
270: src6.sin6_family = AF_INET6;
271: src6.sin6_len = sizeof(struct sockaddr_in6);
272: src6.sin6_addr.s6_addr[10] = src6.sin6_addr.s6_addr[11] = 0xff;
273: bcopy(&ip->ip_src, &src6.sin6_addr.s6_addr[12],
274: sizeof(ip->ip_src));
275: src6.sin6_port = uh->uh_sport;
276: bzero(&dst6, sizeof(dst6));
277: dst6.sin6_family = AF_INET6;
278: dst6.sin6_len = sizeof(struct sockaddr_in6);
279: dst6.sin6_addr.s6_addr[10] = dst6.sin6_addr.s6_addr[11] = 0xff;
280: bcopy(&ip->ip_dst, &dst6.sin6_addr.s6_addr[12],
281: sizeof(ip->ip_dst));
282: dst6.sin6_port = uh->uh_dport;
283:
284: n += udp6_realinput(AF_INET, &src6, &dst6, m, iphlen);
285: }
286: #endif
287:
288: if (n == 0) {
289: if (m->m_flags & (M_BCAST | M_MCAST)) {
290: udpstat.udps_noportbcast++;
291: goto bad;
292: }
1.61 itojun 293: udpstat.udps_noport++;
1.64 ws 294: #ifdef IPKDB
1.53 itojun 295: if (checkipkdb(&ip->ip_src, uh->uh_sport, uh->uh_dport,
296: m, iphlen + sizeof(struct udphdr),
297: m->m_pkthdr.len - iphlen - sizeof(struct udphdr))) {
298: /*
299: * It was a debugger connect packet,
300: * just drop it now
301: */
302: goto bad;
303: }
304: #endif
305: icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0);
306: m = NULL;
307: }
308:
309: bad:
310: if (m)
311: m_freem(m);
312: }
313:
314: #ifdef INET6
315: int
316: udp6_input(mp, offp, proto)
317: struct mbuf **mp;
318: int *offp, proto;
319: {
320: struct mbuf *m = *mp;
321: int off = *offp;
322: struct sockaddr_in6 src, dst;
323: struct ip6_hdr *ip6;
324: struct udphdr *uh;
325: u_int32_t plen, ulen;
326:
327: #if defined(NFAITH) && 0 < NFAITH
328: if (m->m_pkthdr.rcvif) {
329: if (m->m_pkthdr.rcvif->if_type == IFT_FAITH) {
330: /* send icmp6 host unreach? */
331: m_freem(m);
332: return IPPROTO_DONE;
333: }
334: }
335: #endif
336:
337: udp6stat.udp6s_ipackets++;
338:
339: #ifndef PULLDOWN_TEST
340: IP6_EXTHDR_CHECK(m, off, sizeof(struct udphdr), IPPROTO_DONE);
341: #endif
342:
343: ip6 = mtod(m, struct ip6_hdr *);
344: /* check for jumbogram is done in ip6_input. we can trust pkthdr.len */
345: plen = m->m_pkthdr.len - off;
346: #ifndef PULLDOWN_TEST
347: uh = (struct udphdr *)((caddr_t)ip6 + off);
348: #else
349: IP6_EXTHDR_GET(uh, struct udphdr *, m, off, sizeof(struct udphdr));
350: if (uh == NULL) {
351: ip6stat.ip6s_tooshort++;
352: return IPPROTO_DONE;
353: }
354: #endif
355: ulen = ntohs((u_short)uh->uh_ulen);
356: if (ulen == 0 && plen > 0xffff)
357: ulen = plen;
358:
359: if (plen != ulen) {
360: udp6stat.udp6s_badlen++;
1.54 itojun 361: goto bad;
362: }
363:
1.57 itojun 364: /* destination port of 0 is illegal, based on RFC768. */
365: if (uh->uh_dport == 0)
366: goto bad;
367:
1.54 itojun 368: /* Be proactive about malicious use of IPv4 mapped address */
369: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
370: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
371: /* XXX stat */
1.53 itojun 372: goto bad;
373: }
374:
375: /*
376: * Checksum extended UDP header and data.
377: */
378: if (uh->uh_sum == 0)
379: udp6stat.udp6s_nosum++;
380: else if (in6_cksum(m, IPPROTO_UDP, off, ulen) != 0) {
381: udp6stat.udp6s_badsum++;
382: goto bad;
383: }
384:
385: /*
386: * Construct source and dst sockaddrs.
387: * Note that ifindex (s6_addr16[1]) is already filled.
388: */
389: bzero(&src, sizeof(src));
390: src.sin6_family = AF_INET6;
391: src.sin6_len = sizeof(struct sockaddr_in6);
392: bcopy(&ip6->ip6_src, &src.sin6_addr, sizeof(src.sin6_addr));
393: if (IN6_IS_SCOPE_LINKLOCAL(&src.sin6_addr))
394: src.sin6_addr.s6_addr16[1] = 0;
395: if (m->m_pkthdr.rcvif) {
396: if (IN6_IS_SCOPE_LINKLOCAL(&src.sin6_addr))
397: src.sin6_scope_id = m->m_pkthdr.rcvif->if_index;
398: else
399: src.sin6_scope_id = 0;
400: }
401: src.sin6_port = uh->uh_sport;
402: bzero(&dst, sizeof(dst));
403: dst.sin6_family = AF_INET6;
404: dst.sin6_len = sizeof(struct sockaddr_in6);
405: bcopy(&ip6->ip6_dst, &dst.sin6_addr, sizeof(dst.sin6_addr));
406: if (IN6_IS_SCOPE_LINKLOCAL(&dst.sin6_addr))
407: dst.sin6_addr.s6_addr16[1] = 0;
408: if (m->m_pkthdr.rcvif) {
409: if (IN6_IS_SCOPE_LINKLOCAL(&dst.sin6_addr))
410: dst.sin6_scope_id = m->m_pkthdr.rcvif->if_index;
411: else
412: dst.sin6_scope_id = 0;
413: }
414: dst.sin6_port = uh->uh_dport;
415:
416: if (udp6_realinput(AF_INET6, &src, &dst, m, off) == 0) {
417: if (m->m_flags & M_MCAST) {
418: udp6stat.udp6s_noportmcast++;
419: goto bad;
420: }
1.61 itojun 421: udp6stat.udp6s_noport++;
1.53 itojun 422: icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0);
423: m = NULL;
424: }
425:
426: bad:
427: if (m)
428: m_freem(m);
429: return IPPROTO_DONE;
430: }
431: #endif
432:
433: static void
434: udp4_sendup(m, off, src, so)
435: struct mbuf *m;
436: int off; /* offset of data portion */
437: struct sockaddr *src;
438: struct socket *so;
439: {
440: struct mbuf *opts = NULL;
441: struct mbuf *n;
442: struct inpcb *inp = NULL;
443: #ifdef INET6
444: struct in6pcb *in6p = NULL;
445: #endif
446:
447: if (!so)
448: return;
449: switch (so->so_proto->pr_domain->dom_family) {
450: case AF_INET:
451: inp = sotoinpcb(so);
452: break;
453: #ifdef INET6
454: case AF_INET6:
455: in6p = sotoin6pcb(so);
456: break;
457: #endif
458: default:
459: return;
460: }
461:
462: #ifdef IPSEC
463: /* check AH/ESP integrity. */
464: if (so != NULL && ipsec4_in_reject_so(m, so)) {
465: ipsecstat.in_polvio++;
466: return;
467: }
468: #endif /*IPSEC*/
469:
470: if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
471: if (inp && (inp->inp_flags & INP_CONTROLOPTS
472: || so->so_options & SO_TIMESTAMP)) {
473: struct ip *ip = mtod(n, struct ip *);
474: ip_savecontrol(inp, &opts, ip, n);
475: }
476:
477: m_adj(n, off);
478: if (sbappendaddr(&so->so_rcv, src, n,
479: opts) == 0) {
480: m_freem(n);
481: if (opts)
482: m_freem(opts);
483: } else
484: sorwakeup(so);
485: }
486: }
487:
488: #ifdef INET6
489: static void
490: udp6_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 in6pcb *in6p = NULL;
499:
500: if (!so)
501: return;
502: if (so->so_proto->pr_domain->dom_family != AF_INET6)
503: return;
504: in6p = sotoin6pcb(so);
505:
506: #ifdef IPSEC
507: /* check AH/ESP integrity. */
508: if (so != NULL && ipsec6_in_reject_so(m, so)) {
509: ipsec6stat.in_polvio++;
510: return;
511: }
512: #endif /*IPSEC*/
513:
514: if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
515: if (in6p && (in6p->in6p_flags & IN6P_CONTROLOPTS
516: || in6p->in6p_socket->so_options & SO_TIMESTAMP)) {
517: struct ip6_hdr *ip6 = mtod(n, struct ip6_hdr *);
518: ip6_savecontrol(in6p, &opts, ip6, n);
519: }
520:
521: m_adj(n, off);
522: if (sbappendaddr(&so->so_rcv, src, n, opts) == 0) {
523: m_freem(n);
524: if (opts)
525: m_freem(opts);
526: udp6stat.udp6s_fullsock++;
527: } else
528: sorwakeup(so);
529: }
530: }
531: #endif
532:
533: static int
534: udp4_realinput(src, dst, m, off)
535: struct sockaddr_in *src;
536: struct sockaddr_in *dst;
537: struct mbuf *m;
538: int off; /* offset of udphdr */
539: {
540: u_int16_t *sport, *dport;
541: int rcvcnt;
542: struct in_addr *src4, *dst4;
543: struct inpcb *inp;
544:
545: rcvcnt = 0;
546: off += sizeof(struct udphdr); /* now, offset of payload */
547:
548: if (src->sin_family != AF_INET || dst->sin_family != AF_INET)
549: goto bad;
550:
551: src4 = &src->sin_addr;
552: sport = &src->sin_port;
553: dst4 = &dst->sin_addr;
554: dport = &dst->sin_port;
555:
556: if (IN_MULTICAST(src4->s_addr) ||
557: in_broadcast(*dst4, m->m_pkthdr.rcvif)) {
558: struct inpcb *last;
559: /*
560: * Deliver a multicast or broadcast datagram to *all* sockets
561: * for which the local and remote addresses and ports match
562: * those of the incoming datagram. This allows more than
563: * one process to receive multi/broadcasts on the same port.
564: * (This really ought to be done for unicast datagrams as
565: * well, but that would cause problems with existing
566: * applications that open both address-specific sockets and
567: * a wildcard socket listening to the same port -- they would
568: * end up receiving duplicates of every unicast datagram.
569: * Those applications open the multiple sockets to overcome an
570: * inadequacy of the UDP socket interface, but for backwards
571: * compatibility we avoid the problem here rather than
572: * fixing the interface. Maybe 4.5BSD will remedy this?)
573: */
574:
575: /*
576: * KAME note: usually we drop udpiphdr from mbuf here.
577: * we need udpiphdr for iPsec processing so we do that later.
578: */
579: /*
580: * Locate pcb(s) for datagram.
581: */
582: for (inp = udbtable.inpt_queue.cqh_first;
583: inp != (struct inpcb *)&udbtable.inpt_queue;
584: inp = inp->inp_queue.cqe_next) {
585: if (inp->inp_lport != *dport)
586: continue;
587: if (!in_nullhost(inp->inp_laddr)) {
588: if (!in_hosteq(inp->inp_laddr, *dst4))
589: continue;
590: }
591: if (!in_nullhost(inp->inp_faddr)) {
592: if (!in_hosteq(inp->inp_faddr, *src4) ||
593: inp->inp_fport != *sport)
594: continue;
595: }
596:
597: last = inp;
598: udp4_sendup(m, off, (struct sockaddr *)src,
599: inp->inp_socket);
600: rcvcnt++;
601:
602: /*
603: * Don't look for additional matches if this one does
604: * not have either the SO_REUSEPORT or SO_REUSEADDR
605: * socket options set. This heuristic avoids searching
606: * through all pcbs in the common case of a non-shared
607: * port. It assumes that an application will never
608: * clear these options after setting them.
609: */
610: if ((inp->inp_socket->so_options &
611: (SO_REUSEPORT|SO_REUSEADDR)) == 0)
612: break;
613: }
614:
615: #if 0
616: if (last == NULL) {
617: /*
618: * No matching pcb found; discard datagram.
619: * (No need to send an ICMP Port Unreachable
620: * for a broadcast or multicast datgram.)
621: */
622: udpstat.udps_noportbcast++;
623: goto bad;
624: }
625: #endif
626: } else {
627: /*
628: * Locate pcb for datagram.
629: */
630: inp = in_pcblookup_connect(&udbtable, *src4, *sport, *dst4, *dport);
631: if (inp == 0) {
632: ++udpstat.udps_pcbhashmiss;
633: inp = in_pcblookup_bind(&udbtable, *dst4, *dport);
634: if (inp == 0) {
635: #if 0
636: struct mbuf *n;
637:
638: if (m->m_flags & (M_BCAST | M_MCAST)) {
639: udpstat.udps_noportbcast++;
640: goto bad;
641: }
1.61 itojun 642: udpstat.udps_noport++;
1.64 ws 643: #ifdef IPKDB
1.53 itojun 644: if (checkipkdb(src4, *sport, *dport, m, off,
645: m->m_pkthdr.len - off)) {
646: /*
647: * It was a debugger connect packet,
648: * just drop it now
649: */
650: goto bad;
651: }
652: #endif
653: if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
654: icmp_error(n, ICMP_UNREACH,
655: ICMP_UNREACH_PORT, 0, 0);
656: }
657: #endif
658: return rcvcnt;
659: }
660: }
661:
662: udp4_sendup(m, off, (struct sockaddr *)src, inp->inp_socket);
663: rcvcnt++;
664: }
665:
666: bad:
667: return rcvcnt;
668: }
669:
670: #ifdef INET6
671: static int
672: in6_mcmatch(in6p, ia6, ifp)
673: struct in6pcb *in6p;
1.66 augustss 674: struct in6_addr *ia6;
1.53 itojun 675: struct ifnet *ifp;
676: {
677: struct ip6_moptions *im6o = in6p->in6p_moptions;
678: struct in6_multi_mship *imm;
679:
680: if (im6o == NULL)
681: return 0;
682:
683: for (imm = im6o->im6o_memberships.lh_first; imm != NULL;
684: imm = imm->i6mm_chain.le_next) {
685: if ((ifp == NULL ||
686: imm->i6mm_maddr->in6m_ifp == ifp) &&
687: IN6_ARE_ADDR_EQUAL(&imm->i6mm_maddr->in6m_addr,
688: ia6))
689: return 1;
690: }
691: return 0;
692: }
693:
694: static int
695: udp6_realinput(af, src, dst, m, off)
696: int af; /* af on packet */
697: struct sockaddr_in6 *src;
698: struct sockaddr_in6 *dst;
699: struct mbuf *m;
700: int off; /* offset of udphdr */
701: {
702: u_int16_t *sport, *dport;
703: int rcvcnt;
704: struct in6_addr *src6, *dst6;
705: struct in_addr *src4;
706: struct in6pcb *in6p;
707:
708: rcvcnt = 0;
709: off += sizeof(struct udphdr); /* now, offset of payload */
710:
711: if (af != AF_INET && af != AF_INET6)
712: goto bad;
713: if (src->sin6_family != AF_INET6 || dst->sin6_family != AF_INET6)
714: goto bad;
715:
716: src6 = &src->sin6_addr;
717: sport = &src->sin6_port;
718: dst6 = &dst->sin6_addr;
719: dport = &dst->sin6_port;
720: src4 = (struct in_addr *)&src->sin6_addr.s6_addr32[12];
721:
722: if (IN6_IS_ADDR_MULTICAST(dst6)
723: || (af == AF_INET && IN_MULTICAST(src4->s_addr))) {
724: struct in6pcb *last;
725: /*
726: * Deliver a multicast or broadcast datagram to *all* sockets
727: * for which the local and remote addresses and ports match
728: * those of the incoming datagram. This allows more than
729: * one process to receive multi/broadcasts on the same port.
730: * (This really ought to be done for unicast datagrams as
731: * well, but that would cause problems with existing
732: * applications that open both address-specific sockets and
733: * a wildcard socket listening to the same port -- they would
734: * end up receiving duplicates of every unicast datagram.
735: * Those applications open the multiple sockets to overcome an
736: * inadequacy of the UDP socket interface, but for backwards
737: * compatibility we avoid the problem here rather than
738: * fixing the interface. Maybe 4.5BSD will remedy this?)
739: */
740:
741: /*
742: * KAME note: usually we drop udpiphdr from mbuf here.
743: * we need udpiphdr for iPsec processing so we do that later.
744: */
745: /*
746: * Locate pcb(s) for datagram.
747: */
748: for (in6p = udb6.in6p_next; in6p != &udb6;
749: in6p = in6p->in6p_next) {
750: if (in6p->in6p_lport != *dport)
751: continue;
752: if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) {
753: if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, dst6)
754: && !in6_mcmatch(in6p, dst6, m->m_pkthdr.rcvif))
755: continue;
756: }
1.55 itojun 757: #ifndef INET6_BINDV6ONLY
758: else {
759: if (IN6_IS_ADDR_V4MAPPED(dst6)
760: && (in6p->in6p_flags & IN6P_BINDV6ONLY))
761: continue;
762: }
763: #endif
1.53 itojun 764: if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
765: if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, src6)
766: || in6p->in6p_fport != *sport)
767: continue;
768: }
1.55 itojun 769: #ifndef INET6_BINDV6ONLY
770: else {
771: if (IN6_IS_ADDR_V4MAPPED(src6)
772: && (in6p->in6p_flags & IN6P_BINDV6ONLY))
773: continue;
774: }
775: #endif
1.53 itojun 776:
777: last = in6p;
778: udp6_sendup(m, off, (struct sockaddr *)src,
779: in6p->in6p_socket);
780: rcvcnt++;
781:
782: /*
783: * Don't look for additional matches if this one does
784: * not have either the SO_REUSEPORT or SO_REUSEADDR
785: * socket options set. This heuristic avoids searching
786: * through all pcbs in the common case of a non-shared
787: * port. It assumes that an application will never
788: * clear these options after setting them.
789: */
790: if ((in6p->in6p_socket->so_options &
791: (SO_REUSEPORT|SO_REUSEADDR)) == 0)
792: break;
793: }
794:
795: #if 0
796: if (last == NULL) {
797: /*
798: * No matching pcb found; discard datagram.
799: * (No need to send an ICMP Port Unreachable
800: * for a broadcast or multicast datgram.)
801: */
802: switch (af) {
803: case AF_INET:
804: udpstat.udps_noportbcast++;
805: break;
806: case AF_INET6:
807: udp6stat.udp6s_noportmcast++;
808: break;
809: }
810: goto bad;
811: }
812: #endif
813: } else {
814: /*
815: * Locate pcb for datagram.
816: */
817: in6p = in6_pcblookup_connect(&udb6, src6, *sport,
818: dst6, *dport, 0);
819: if (in6p == 0) {
820: ++udpstat.udps_pcbhashmiss;
821: in6p = in6_pcblookup_bind(&udb6, dst6, *dport, 0);
822: if (in6p == 0) {
823: #if 0
824: struct mbuf *n;
825: n = m_copy(m, 0, M_COPYALL);
826: switch (af) {
827: case AF_INET:
828: if (m->m_flags & (M_BCAST | M_MCAST)) {
829: udpstat.udps_noportbcast++;
830: goto bad;
831: }
1.61 itojun 832: udpstat.udps_noport++;
1.53 itojun 833: if (n != NULL)
834: icmp_error(n, ICMP_UNREACH,
835: ICMP_UNREACH_PORT, 0, 0);
836: break;
837: case AF_INET6:
838: if (m->m_flags & M_MCAST) {
839: udp6stat.udp6s_noportmcast++;
840: goto bad;
841: }
1.61 itojun 842: udp6stat.udp6s_noport++;
1.53 itojun 843: if (n != NULL)
844: icmp6_error(n, ICMP6_DST_UNREACH,
845: ICMP6_DST_UNREACH_NOPORT, 0);
846: break;
847: }
848: #endif
849:
850: return rcvcnt;
851: }
852: }
853:
854: udp6_sendup(m, off, (struct sockaddr *)src, in6p->in6p_socket);
855: rcvcnt++;
856: }
857:
858: bad:
859: return rcvcnt;
860: }
861: #endif
862:
1.56 itojun 863: #else /*UDP6*/
864:
1.53 itojun 865: void
866: #if __STDC__
867: udp_input(struct mbuf *m, ...)
868: #else
869: udp_input(m, va_alist)
870: struct mbuf *m;
871: va_dcl
872: #endif
873: {
1.48 itojun 874: int proto;
1.66 augustss 875: struct ip *ip;
876: struct udphdr *uh;
877: struct inpcb *inp;
1.1 cgd 878: struct mbuf *opts = 0;
879: int len;
880: struct ip save_ip;
1.27 christos 881: int iphlen;
882: va_list ap;
1.34 mycroft 883: struct sockaddr_in udpsrc;
1.48 itojun 884: struct sockaddr *sa;
1.27 christos 885:
886: va_start(ap, m);
887: iphlen = va_arg(ap, int);
1.48 itojun 888: proto = va_arg(ap, int);
1.27 christos 889: va_end(ap);
1.1 cgd 890:
891: udpstat.udps_ipackets++;
892:
893: /*
894: * Strip IP options, if any; should skip this,
895: * make available to user, and use on returned packets,
896: * but we don't yet have a way to check the checksum
897: * with options still present.
898: */
899: if (iphlen > sizeof (struct ip)) {
900: ip_stripoptions(m, (struct mbuf *)0);
901: iphlen = sizeof(struct ip);
902: }
903:
904: /*
905: * Get IP and UDP header together in first mbuf.
906: */
907: ip = mtod(m, struct ip *);
908: if (m->m_len < iphlen + sizeof(struct udphdr)) {
909: if ((m = m_pullup(m, iphlen + sizeof(struct udphdr))) == 0) {
910: udpstat.udps_hdrops++;
911: return;
912: }
913: ip = mtod(m, struct ip *);
914: }
915: uh = (struct udphdr *)((caddr_t)ip + iphlen);
1.57 itojun 916:
917: /* destination port of 0 is illegal, based on RFC768. */
918: if (uh->uh_dport == 0)
919: goto bad;
1.1 cgd 920:
921: /*
922: * Make mbuf data length reflect UDP length.
923: * If not enough data to reflect UDP length, drop.
924: */
1.15 cgd 925: len = ntohs((u_int16_t)uh->uh_ulen);
1.47 mycroft 926: if (ip->ip_len != iphlen + len) {
927: if (ip->ip_len < iphlen + len) {
1.1 cgd 928: udpstat.udps_badlen++;
929: goto bad;
930: }
1.47 mycroft 931: m_adj(m, iphlen + len - ip->ip_len);
1.1 cgd 932: }
933: /*
934: * Save a copy of the IP header in case we want restore it
935: * for sending an ICMP error message in response.
936: */
937: save_ip = *ip;
938:
939: /*
940: * Checksum extended UDP header and data.
941: */
1.29 mrg 942: if (uh->uh_sum) {
1.25 cgd 943: bzero(((struct ipovly *)ip)->ih_x1,
944: sizeof ((struct ipovly *)ip)->ih_x1);
1.1 cgd 945: ((struct ipovly *)ip)->ih_len = uh->uh_ulen;
1.46 mycroft 946: if (in_cksum(m, len + sizeof (struct ip)) != 0) {
1.1 cgd 947: udpstat.udps_badsum++;
948: m_freem(m);
949: return;
950: }
951: }
1.13 mycroft 952:
1.48 itojun 953: /*
954: * Construct sockaddr format source address.
955: */
956: udpsrc.sin_family = AF_INET;
957: udpsrc.sin_len = sizeof(struct sockaddr_in);
958: udpsrc.sin_addr = ip->ip_src;
959: udpsrc.sin_port = uh->uh_sport;
960: bzero((caddr_t)udpsrc.sin_zero, sizeof(udpsrc.sin_zero));
961:
1.16 mycroft 962: if (IN_MULTICAST(ip->ip_dst.s_addr) ||
1.13 mycroft 963: in_broadcast(ip->ip_dst, m->m_pkthdr.rcvif)) {
1.40 thorpej 964: struct inpcb *last;
1.4 hpeyerl 965: /*
966: * Deliver a multicast or broadcast datagram to *all* sockets
967: * for which the local and remote addresses and ports match
968: * those of the incoming datagram. This allows more than
969: * one process to receive multi/broadcasts on the same port.
970: * (This really ought to be done for unicast datagrams as
971: * well, but that would cause problems with existing
972: * applications that open both address-specific sockets and
973: * a wildcard socket listening to the same port -- they would
974: * end up receiving duplicates of every unicast datagram.
975: * Those applications open the multiple sockets to overcome an
976: * inadequacy of the UDP socket interface, but for backwards
977: * compatibility we avoid the problem here rather than
1.13 mycroft 978: * fixing the interface. Maybe 4.5BSD will remedy this?)
1.4 hpeyerl 979: */
1.13 mycroft 980:
1.48 itojun 981: iphlen += sizeof(struct udphdr);
1.4 hpeyerl 982: /*
1.48 itojun 983: * KAME note: usually we drop udpiphdr from mbuf here.
984: * we need udpiphdr for iPsec processing so we do that later.
1.4 hpeyerl 985: */
986: /*
987: * Locate pcb(s) for datagram.
988: * (Algorithm copied from raw_intr().)
989: */
990: last = NULL;
1.22 cgd 991: for (inp = udbtable.inpt_queue.cqh_first;
992: inp != (struct inpcb *)&udbtable.inpt_queue;
993: inp = inp->inp_queue.cqe_next) {
1.4 hpeyerl 994: if (inp->inp_lport != uh->uh_dport)
995: continue;
1.34 mycroft 996: if (!in_nullhost(inp->inp_laddr)) {
997: if (!in_hosteq(inp->inp_laddr, ip->ip_dst))
1.4 hpeyerl 998: continue;
999: }
1.34 mycroft 1000: if (!in_nullhost(inp->inp_faddr)) {
1001: if (!in_hosteq(inp->inp_faddr, ip->ip_src) ||
1.4 hpeyerl 1002: inp->inp_fport != uh->uh_sport)
1003: continue;
1004: }
1005:
1006: if (last != NULL) {
1007: struct mbuf *n;
1008:
1.48 itojun 1009: #ifdef IPSEC
1010: /* check AH/ESP integrity. */
1011: if (last != NULL && ipsec4_in_reject(m, last)) {
1012: ipsecstat.in_polvio++;
1013: /* do not inject data to pcb */
1014: } else
1015: #endif /*IPSEC*/
1.4 hpeyerl 1016: if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
1.40 thorpej 1017: if (last->inp_flags & INP_CONTROLOPTS
1018: || last->inp_socket->so_options &
1019: SO_TIMESTAMP) {
1020: ip_savecontrol(last, &opts,
1021: ip, n);
1022: }
1.49 drochner 1023: m_adj(n, iphlen);
1.48 itojun 1024: sa = (struct sockaddr *)&udpsrc;
1.40 thorpej 1025: if (sbappendaddr(
1026: &last->inp_socket->so_rcv,
1.48 itojun 1027: sa, n, opts) == 0) {
1.4 hpeyerl 1028: m_freem(n);
1.40 thorpej 1029: if (opts)
1030: m_freem(opts);
1.13 mycroft 1031: } else
1.40 thorpej 1032: sorwakeup(last->inp_socket);
1033: opts = 0;
1.4 hpeyerl 1034: }
1035: }
1.40 thorpej 1036: last = inp;
1.4 hpeyerl 1037: /*
1.13 mycroft 1038: * Don't look for additional matches if this one does
1039: * not have either the SO_REUSEPORT or SO_REUSEADDR
1040: * socket options set. This heuristic avoids searching
1041: * through all pcbs in the common case of a non-shared
1042: * port. It * assumes that an application will never
1043: * clear these options after setting them.
1.4 hpeyerl 1044: */
1.40 thorpej 1045: if ((last->inp_socket->so_options &
1046: (SO_REUSEPORT|SO_REUSEADDR)) == 0)
1.4 hpeyerl 1047: break;
1048: }
1.6 mycroft 1049:
1.4 hpeyerl 1050: if (last == NULL) {
1051: /*
1052: * No matching pcb found; discard datagram.
1053: * (No need to send an ICMP Port Unreachable
1054: * for a broadcast or multicast datgram.)
1055: */
1.13 mycroft 1056: udpstat.udps_noportbcast++;
1.4 hpeyerl 1057: goto bad;
1058: }
1.48 itojun 1059: #ifdef IPSEC
1060: /* check AH/ESP integrity. */
1061: if (last != NULL && ipsec4_in_reject(m, last)) {
1062: ipsecstat.in_polvio++;
1063: goto bad;
1064: }
1065: #endif /*IPSEC*/
1.40 thorpej 1066: if (last->inp_flags & INP_CONTROLOPTS ||
1067: last->inp_socket->so_options & SO_TIMESTAMP)
1068: ip_savecontrol(last, &opts, ip, m);
1.49 drochner 1069: m->m_len -= iphlen;
1070: m->m_pkthdr.len -= iphlen;
1071: m->m_data += iphlen;
1.48 itojun 1072: sa = (struct sockaddr *)&udpsrc;
1073: if (sbappendaddr(&last->inp_socket->so_rcv, sa, m, opts) == 0) {
1.13 mycroft 1074: udpstat.udps_fullsock++;
1.4 hpeyerl 1075: goto bad;
1.13 mycroft 1076: }
1.40 thorpej 1077: sorwakeup(last->inp_socket);
1.4 hpeyerl 1078: return;
1079: }
1.1 cgd 1080: /*
1081: * Locate pcb for datagram.
1082: */
1.35 mycroft 1083: inp = in_pcblookup_connect(&udbtable, ip->ip_src, uh->uh_sport,
1.26 mycroft 1084: ip->ip_dst, uh->uh_dport);
1085: if (inp == 0) {
1086: ++udpstat.udps_pcbhashmiss;
1.35 mycroft 1087: inp = in_pcblookup_bind(&udbtable, ip->ip_dst, uh->uh_dport);
1.18 mycroft 1088: if (inp == 0) {
1089: if (m->m_flags & (M_BCAST | M_MCAST)) {
1090: udpstat.udps_noportbcast++;
1091: goto bad;
1092: }
1.61 itojun 1093: udpstat.udps_noport++;
1.18 mycroft 1094: *ip = save_ip;
1.64 ws 1095: #ifdef IPKDB
1.38 ws 1096: if (checkipkdb(&ip->ip_src,
1097: uh->uh_sport,
1098: uh->uh_dport,
1099: m,
1100: iphlen + sizeof(struct udphdr),
1101: len - sizeof(struct udphdr)))
1.37 ws 1102: /* It was a debugger connect packet, just drop it now */
1103: goto bad;
1104: #endif
1.18 mycroft 1105: icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0);
1106: return;
1.13 mycroft 1107: }
1.1 cgd 1108: }
1.48 itojun 1109: #ifdef IPSEC
1110: if (inp != NULL && ipsec4_in_reject(m, inp)) {
1111: ipsecstat.in_polvio++;
1112: goto bad;
1113: }
1114: #endif /*IPSEC*/
1.1 cgd 1115:
1116: /*
1117: * Stuff source address and datagram in user buffer.
1118: */
1.40 thorpej 1119: if (inp->inp_flags & INP_CONTROLOPTS ||
1120: inp->inp_socket->so_options & SO_TIMESTAMP)
1121: ip_savecontrol(inp, &opts, ip, m);
1.1 cgd 1122: iphlen += sizeof(struct udphdr);
1123: m->m_len -= iphlen;
1124: m->m_pkthdr.len -= iphlen;
1125: m->m_data += iphlen;
1.48 itojun 1126: sa = (struct sockaddr *)&udpsrc;
1127: if (sbappendaddr(&inp->inp_socket->so_rcv, sa, m, opts) == 0) {
1.1 cgd 1128: udpstat.udps_fullsock++;
1129: goto bad;
1130: }
1131: sorwakeup(inp->inp_socket);
1132: return;
1133: bad:
1134: m_freem(m);
1135: if (opts)
1136: m_freem(opts);
1137: }
1.56 itojun 1138: #endif /*UDP6*/
1.1 cgd 1139:
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 *);
1.25 cgd 1233: bzero(ui->ui_x1, sizeof ui->ui_x1);
1.1 cgd 1234: ui->ui_pr = IPPROTO_UDP;
1.15 cgd 1235: ui->ui_len = htons((u_int16_t)len + sizeof (struct udphdr));
1.1 cgd 1236: ui->ui_src = inp->inp_laddr;
1237: ui->ui_dst = inp->inp_faddr;
1238: ui->ui_sport = inp->inp_lport;
1239: ui->ui_dport = inp->inp_fport;
1240: ui->ui_ulen = ui->ui_len;
1241:
1242: /*
1243: * Stuff checksum and output datagram.
1244: */
1245: ui->ui_sum = 0;
1246: if (udpcksum) {
1247: if ((ui->ui_sum = in_cksum(m, sizeof (struct udpiphdr) + len)) == 0)
1248: ui->ui_sum = 0xffff;
1249: }
1250: ((struct ip *)ui)->ip_len = sizeof (struct udpiphdr) + len;
1251: ((struct ip *)ui)->ip_ttl = inp->inp_ip.ip_ttl; /* XXX */
1252: ((struct ip *)ui)->ip_tos = inp->inp_ip.ip_tos; /* XXX */
1253: udpstat.udps_opackets++;
1.48 itojun 1254:
1255: #ifdef IPSEC
1.63 itojun 1256: ipsec_setsocket(m, inp->inp_socket);
1.48 itojun 1257: #endif /*IPSEC*/
1258:
1.31 mycroft 1259: return (ip_output(m, inp->inp_options, &inp->inp_route,
1.12 mycroft 1260: inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST),
1.31 mycroft 1261: inp->inp_moptions));
1.1 cgd 1262:
1263: release:
1264: m_freem(m);
1265: return (error);
1266: }
1267:
1.42 thorpej 1268: int udp_sendspace = 9216; /* really max datagram size */
1269: int udp_recvspace = 40 * (1024 + sizeof(struct sockaddr_in));
1.1 cgd 1270: /* 40 1K datagrams */
1271:
1272: /*ARGSUSED*/
1.7 mycroft 1273: int
1.31 mycroft 1274: udp_usrreq(so, req, m, nam, control, p)
1.1 cgd 1275: struct socket *so;
1276: int req;
1.31 mycroft 1277: struct mbuf *m, *nam, *control;
1.30 mycroft 1278: struct proc *p;
1.1 cgd 1279: {
1.66 augustss 1280: struct inpcb *inp;
1.1 cgd 1281: int s;
1.66 augustss 1282: int error = 0;
1.1 cgd 1283:
1284: if (req == PRU_CONTROL)
1.31 mycroft 1285: return (in_control(so, (long)m, (caddr_t)nam,
1.30 mycroft 1286: (struct ifnet *)control, p));
1.59 thorpej 1287:
1.60 thorpej 1288: if (req == PRU_PURGEIF) {
1289: in_purgeif((struct ifnet *)control);
1290: in_pcbpurgeif(&udbtable, (struct ifnet *)control);
1.59 thorpej 1291: return (0);
1292: }
1.31 mycroft 1293:
1294: s = splsoftnet();
1295: inp = sotoinpcb(so);
1.32 mycroft 1296: #ifdef DIAGNOSTIC
1297: if (req != PRU_SEND && req != PRU_SENDOOB && control)
1298: panic("udp_usrreq: unexpected control mbuf");
1299: #endif
1.31 mycroft 1300: if (inp == 0 && req != PRU_ATTACH) {
1301: error = EINVAL;
1302: goto release;
1303: }
1304:
1.1 cgd 1305: /*
1306: * Note: need to block udp_input while changing
1307: * the udp pcb queue and/or pcb addresses.
1308: */
1309: switch (req) {
1310:
1311: case PRU_ATTACH:
1.31 mycroft 1312: if (inp != 0) {
1313: error = EISCONN;
1.1 cgd 1314: break;
1315: }
1.31 mycroft 1316: if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
1317: error = soreserve(so, udp_sendspace, udp_recvspace);
1318: if (error)
1319: break;
1320: }
1.18 mycroft 1321: error = in_pcballoc(so, &udbtable);
1.1 cgd 1322: if (error)
1323: break;
1.31 mycroft 1324: inp = sotoinpcb(so);
1325: inp->inp_ip.ip_ttl = ip_defttl;
1.48 itojun 1326: #ifdef IPSEC
1.58 itojun 1327: error = ipsec_init_policy(so, &inp->inp_sp);
1.53 itojun 1328: if (error != 0) {
1.52 itojun 1329: in_pcbdetach(inp);
1.53 itojun 1330: break;
1331: }
1.48 itojun 1332: #endif /*IPSEC*/
1.1 cgd 1333: break;
1334:
1335: case PRU_DETACH:
1.31 mycroft 1336: in_pcbdetach(inp);
1.1 cgd 1337: break;
1338:
1339: case PRU_BIND:
1.31 mycroft 1340: error = in_pcbbind(inp, nam, p);
1.1 cgd 1341: break;
1342:
1343: case PRU_LISTEN:
1344: error = EOPNOTSUPP;
1345: break;
1346:
1347: case PRU_CONNECT:
1.31 mycroft 1348: error = in_pcbconnect(inp, nam);
1349: if (error)
1.1 cgd 1350: break;
1.31 mycroft 1351: soisconnected(so);
1.1 cgd 1352: break;
1353:
1354: case PRU_CONNECT2:
1355: error = EOPNOTSUPP;
1356: break;
1357:
1358: case PRU_DISCONNECT:
1.31 mycroft 1359: /*soisdisconnected(so);*/
1360: so->so_state &= ~SS_ISCONNECTED; /* XXX */
1.1 cgd 1361: in_pcbdisconnect(inp);
1.34 mycroft 1362: inp->inp_laddr = zeroin_addr; /* XXX */
1.35 mycroft 1363: in_pcbstate(inp, INP_BOUND); /* XXX */
1.1 cgd 1364: break;
1365:
1366: case PRU_SHUTDOWN:
1367: socantsendmore(so);
1368: break;
1369:
1.31 mycroft 1370: case PRU_RCVD:
1371: error = EOPNOTSUPP;
1.1 cgd 1372: break;
1373:
1.31 mycroft 1374: case PRU_SEND:
1.32 mycroft 1375: if (control && control->m_len) {
1376: m_freem(control);
1377: m_freem(m);
1378: error = EINVAL;
1379: break;
1380: }
1.31 mycroft 1381: {
1.35 mycroft 1382: struct in_addr laddr; /* XXX */
1.1 cgd 1383:
1.31 mycroft 1384: if (nam) {
1.35 mycroft 1385: laddr = inp->inp_laddr; /* XXX */
1.31 mycroft 1386: if ((so->so_state & SS_ISCONNECTED) != 0) {
1387: error = EISCONN;
1.32 mycroft 1388: goto die;
1.31 mycroft 1389: }
1390: error = in_pcbconnect(inp, nam);
1.32 mycroft 1391: if (error) {
1392: die:
1393: m_freem(m);
1.31 mycroft 1394: break;
1.32 mycroft 1395: }
1.31 mycroft 1396: } else {
1397: if ((so->so_state & SS_ISCONNECTED) == 0) {
1398: error = ENOTCONN;
1.32 mycroft 1399: goto die;
1.31 mycroft 1400: }
1401: }
1.33 mycroft 1402: error = udp_output(m, inp);
1.31 mycroft 1403: if (nam) {
1404: in_pcbdisconnect(inp);
1.35 mycroft 1405: inp->inp_laddr = laddr; /* XXX */
1406: in_pcbstate(inp, INP_BOUND); /* XXX */
1.31 mycroft 1407: }
1408: }
1.1 cgd 1409: break;
1410:
1411: case PRU_SENSE:
1412: /*
1413: * stat: don't bother with a blocksize.
1414: */
1.31 mycroft 1415: splx(s);
1.1 cgd 1416: return (0);
1417:
1.31 mycroft 1418: case PRU_RCVOOB:
1419: error = EOPNOTSUPP;
1420: break;
1421:
1.1 cgd 1422: case PRU_SENDOOB:
1.32 mycroft 1423: m_freem(control);
1.31 mycroft 1424: m_freem(m);
1.1 cgd 1425: error = EOPNOTSUPP;
1426: break;
1427:
1.31 mycroft 1428: case PRU_SOCKADDR:
1429: in_setsockaddr(inp, nam);
1430: break;
1431:
1432: case PRU_PEERADDR:
1433: in_setpeeraddr(inp, nam);
1434: break;
1.1 cgd 1435:
1436: default:
1437: panic("udp_usrreq");
1438: }
1439:
1440: release:
1.31 mycroft 1441: splx(s);
1.1 cgd 1442: return (error);
1.13 mycroft 1443: }
1444:
1445: /*
1446: * Sysctl for udp variables.
1447: */
1.27 christos 1448: int
1.13 mycroft 1449: udp_sysctl(name, namelen, oldp, oldlenp, newp, newlen)
1450: int *name;
1451: u_int namelen;
1452: void *oldp;
1453: size_t *oldlenp;
1454: void *newp;
1455: size_t newlen;
1456: {
1457: /* All sysctl names at this level are terminal. */
1458: if (namelen != 1)
1459: return (ENOTDIR);
1460:
1461: switch (name[0]) {
1462: case UDPCTL_CHECKSUM:
1463: return (sysctl_int(oldp, oldlenp, newp, newlen, &udpcksum));
1.42 thorpej 1464: case UDPCTL_SENDSPACE:
1465: return (sysctl_int(oldp, oldlenp, newp, newlen,
1466: &udp_sendspace));
1467: case UDPCTL_RECVSPACE:
1468: return (sysctl_int(oldp, oldlenp, newp, newlen,
1469: &udp_recvspace));
1.13 mycroft 1470: default:
1471: return (ENOPROTOOPT);
1472: }
1473: /* NOTREACHED */
1.1 cgd 1474: }
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