Annotation of src/sys/netinet/udp_usrreq.c, Revision 1.67
1.67 ! mrg 1: /* $NetBSD: udp_usrreq.c,v 1.66 2000/03/30 13:25:11 augustss 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: #include <netkey/key_debug.h>
119: #endif /*IPSEC*/
120:
1.64 ws 121: #ifdef IPKDB
122: #include <ipkdb/ipkdb.h>
123: #endif
124:
1.8 mycroft 125: /*
126: * UDP protocol implementation.
127: * Per RFC 768, August, 1980.
128: */
129: #ifndef COMPAT_42
130: int udpcksum = 1;
131: #else
132: int udpcksum = 0; /* XXX */
133: #endif
134:
1.53 itojun 135: static void udp4_sendup __P((struct mbuf *, int, struct sockaddr *,
136: struct socket *));
137: static int udp4_realinput __P((struct sockaddr_in *, struct sockaddr_in *,
138: struct mbuf *, int));
139: #ifdef INET6
140: static void udp6_sendup __P((struct mbuf *, int, struct sockaddr *,
141: struct socket *));
142: static int in6_mcmatch __P((struct in6pcb *, struct in6_addr *,
143: struct ifnet *));
144: static int udp6_realinput __P((int, struct sockaddr_in6 *,
145: struct sockaddr_in6 *, struct mbuf *, int));
146: #endif
1.13 mycroft 147: static void udp_notify __P((struct inpcb *, int));
1.7 mycroft 148:
1.26 mycroft 149: #ifndef UDBHASHSIZE
150: #define UDBHASHSIZE 128
151: #endif
152: int udbhashsize = UDBHASHSIZE;
153:
1.7 mycroft 154: void
1.1 cgd 155: udp_init()
156: {
1.18 mycroft 157:
1.35 mycroft 158: in_pcbinit(&udbtable, udbhashsize, udbhashsize);
1.1 cgd 159: }
160:
1.56 itojun 161: #ifndef UDP6
1.7 mycroft 162: void
1.27 christos 163: #if __STDC__
164: udp_input(struct mbuf *m, ...)
165: #else
166: udp_input(m, va_alist)
167: struct mbuf *m;
168: va_dcl
169: #endif
1.1 cgd 170: {
1.53 itojun 171: va_list ap;
172: struct sockaddr_in src, dst;
173: struct ip *ip;
174: struct udphdr *uh;
175: int iphlen, proto;
176: int len;
177: int n;
178:
179: va_start(ap, m);
180: iphlen = va_arg(ap, int);
181: proto = va_arg(ap, int);
182: va_end(ap);
183:
184: udpstat.udps_ipackets++;
185:
186: #ifndef PULLDOWN_TEST
187: /*
188: * Strip IP options, if any; should skip this,
189: * make available to user, and use on returned packets,
190: * but we don't yet have a way to check the checksum
191: * with options still present.
192: */
193: if (iphlen > sizeof (struct ip)) {
194: ip_stripoptions(m, (struct mbuf *)0);
195: iphlen = sizeof(struct ip);
196: }
197: #else
198: /*
199: * we may enable the above code if we save and pass IPv4 options
200: * to the userland.
201: */
202: #endif
203:
204: /*
205: * Get IP and UDP header together in first mbuf.
206: */
207: ip = mtod(m, struct ip *);
208: #ifndef PULLDOWN_TEST
209: if (m->m_len < iphlen + sizeof(struct udphdr)) {
210: if ((m = m_pullup(m, iphlen + sizeof(struct udphdr))) == 0) {
211: udpstat.udps_hdrops++;
212: return;
213: }
214: ip = mtod(m, struct ip *);
215: }
216: uh = (struct udphdr *)((caddr_t)ip + iphlen);
217: #else
218: IP6_EXTHDR_GET(uh, struct udphdr *, m, iphlen, sizeof(struct udphdr));
219: if (uh == NULL) {
220: udpstat.udps_hdrops++;
221: return;
222: }
223: #endif
224:
1.57 itojun 225: /* destination port of 0 is illegal, based on RFC768. */
226: if (uh->uh_dport == 0)
227: goto bad;
228:
1.53 itojun 229: /*
230: * Make mbuf data length reflect UDP length.
231: * If not enough data to reflect UDP length, drop.
232: */
233: len = ntohs((u_int16_t)uh->uh_ulen);
234: if (ip->ip_len != iphlen + len) {
235: if (ip->ip_len < iphlen + len) {
236: udpstat.udps_badlen++;
237: goto bad;
238: }
239: m_adj(m, iphlen + len - ip->ip_len);
240: }
241:
242: /*
243: * Checksum extended UDP header and data.
244: */
245: if (uh->uh_sum) {
246: if (in4_cksum(m, IPPROTO_UDP, iphlen, len) != 0) {
247: udpstat.udps_badsum++;
248: m_freem(m);
249: return;
250: }
251: }
252:
253: /* construct source and dst sockaddrs. */
254: bzero(&src, sizeof(src));
255: src.sin_family = AF_INET;
256: src.sin_len = sizeof(struct sockaddr_in);
257: bcopy(&ip->ip_src, &src.sin_addr, sizeof(src.sin_addr));
258: src.sin_port = uh->uh_sport;
259: bzero(&dst, sizeof(dst));
260: dst.sin_family = AF_INET;
261: dst.sin_len = sizeof(struct sockaddr_in);
262: bcopy(&ip->ip_dst, &dst.sin_addr, sizeof(dst.sin_addr));
263: dst.sin_port = uh->uh_dport;
264:
265: n = udp4_realinput(&src, &dst, m, iphlen);
266: #ifdef INET6
267: if (IN_MULTICAST(ip->ip_dst.s_addr) || n == 0) {
268: struct sockaddr_in6 src6, dst6;
269:
270: bzero(&src6, sizeof(src6));
271: src6.sin6_family = AF_INET6;
272: src6.sin6_len = sizeof(struct sockaddr_in6);
273: src6.sin6_addr.s6_addr[10] = src6.sin6_addr.s6_addr[11] = 0xff;
274: bcopy(&ip->ip_src, &src6.sin6_addr.s6_addr[12],
275: sizeof(ip->ip_src));
276: src6.sin6_port = uh->uh_sport;
277: bzero(&dst6, sizeof(dst6));
278: dst6.sin6_family = AF_INET6;
279: dst6.sin6_len = sizeof(struct sockaddr_in6);
280: dst6.sin6_addr.s6_addr[10] = dst6.sin6_addr.s6_addr[11] = 0xff;
281: bcopy(&ip->ip_dst, &dst6.sin6_addr.s6_addr[12],
282: sizeof(ip->ip_dst));
283: dst6.sin6_port = uh->uh_dport;
284:
285: n += udp6_realinput(AF_INET, &src6, &dst6, m, iphlen);
286: }
287: #endif
288:
289: if (n == 0) {
290: if (m->m_flags & (M_BCAST | M_MCAST)) {
291: udpstat.udps_noportbcast++;
292: goto bad;
293: }
1.61 itojun 294: udpstat.udps_noport++;
1.64 ws 295: #ifdef IPKDB
1.53 itojun 296: if (checkipkdb(&ip->ip_src, uh->uh_sport, uh->uh_dport,
297: m, iphlen + sizeof(struct udphdr),
298: m->m_pkthdr.len - iphlen - sizeof(struct udphdr))) {
299: /*
300: * It was a debugger connect packet,
301: * just drop it now
302: */
303: goto bad;
304: }
305: #endif
306: icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0);
307: m = NULL;
308: }
309:
310: bad:
311: if (m)
312: m_freem(m);
313: }
314:
315: #ifdef INET6
316: int
317: udp6_input(mp, offp, proto)
318: struct mbuf **mp;
319: int *offp, proto;
320: {
321: struct mbuf *m = *mp;
322: int off = *offp;
323: struct sockaddr_in6 src, dst;
324: struct ip6_hdr *ip6;
325: struct udphdr *uh;
326: u_int32_t plen, ulen;
327:
328: #if defined(NFAITH) && 0 < NFAITH
329: if (m->m_pkthdr.rcvif) {
330: if (m->m_pkthdr.rcvif->if_type == IFT_FAITH) {
331: /* send icmp6 host unreach? */
332: m_freem(m);
333: return IPPROTO_DONE;
334: }
335: }
336: #endif
337:
338: udp6stat.udp6s_ipackets++;
339:
340: #ifndef PULLDOWN_TEST
341: IP6_EXTHDR_CHECK(m, off, sizeof(struct udphdr), IPPROTO_DONE);
342: #endif
343:
344: ip6 = mtod(m, struct ip6_hdr *);
345: /* check for jumbogram is done in ip6_input. we can trust pkthdr.len */
346: plen = m->m_pkthdr.len - off;
347: #ifndef PULLDOWN_TEST
348: uh = (struct udphdr *)((caddr_t)ip6 + off);
349: #else
350: IP6_EXTHDR_GET(uh, struct udphdr *, m, off, sizeof(struct udphdr));
351: if (uh == NULL) {
352: ip6stat.ip6s_tooshort++;
353: return IPPROTO_DONE;
354: }
355: #endif
356: ulen = ntohs((u_short)uh->uh_ulen);
357: if (ulen == 0 && plen > 0xffff)
358: ulen = plen;
359:
360: if (plen != ulen) {
361: udp6stat.udp6s_badlen++;
1.54 itojun 362: goto bad;
363: }
364:
1.57 itojun 365: /* destination port of 0 is illegal, based on RFC768. */
366: if (uh->uh_dport == 0)
367: goto bad;
368:
1.54 itojun 369: /* Be proactive about malicious use of IPv4 mapped address */
370: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
371: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
372: /* XXX stat */
1.53 itojun 373: goto bad;
374: }
375:
376: /*
377: * Checksum extended UDP header and data.
378: */
379: if (uh->uh_sum == 0)
380: udp6stat.udp6s_nosum++;
381: else if (in6_cksum(m, IPPROTO_UDP, off, ulen) != 0) {
382: udp6stat.udp6s_badsum++;
383: goto bad;
384: }
385:
386: /*
387: * Construct source and dst sockaddrs.
388: * Note that ifindex (s6_addr16[1]) is already filled.
389: */
390: bzero(&src, sizeof(src));
391: src.sin6_family = AF_INET6;
392: src.sin6_len = sizeof(struct sockaddr_in6);
393: bcopy(&ip6->ip6_src, &src.sin6_addr, sizeof(src.sin6_addr));
394: if (IN6_IS_SCOPE_LINKLOCAL(&src.sin6_addr))
395: src.sin6_addr.s6_addr16[1] = 0;
396: if (m->m_pkthdr.rcvif) {
397: if (IN6_IS_SCOPE_LINKLOCAL(&src.sin6_addr))
398: src.sin6_scope_id = m->m_pkthdr.rcvif->if_index;
399: else
400: src.sin6_scope_id = 0;
401: }
402: src.sin6_port = uh->uh_sport;
403: bzero(&dst, sizeof(dst));
404: dst.sin6_family = AF_INET6;
405: dst.sin6_len = sizeof(struct sockaddr_in6);
406: bcopy(&ip6->ip6_dst, &dst.sin6_addr, sizeof(dst.sin6_addr));
407: if (IN6_IS_SCOPE_LINKLOCAL(&dst.sin6_addr))
408: dst.sin6_addr.s6_addr16[1] = 0;
409: if (m->m_pkthdr.rcvif) {
410: if (IN6_IS_SCOPE_LINKLOCAL(&dst.sin6_addr))
411: dst.sin6_scope_id = m->m_pkthdr.rcvif->if_index;
412: else
413: dst.sin6_scope_id = 0;
414: }
415: dst.sin6_port = uh->uh_dport;
416:
417: if (udp6_realinput(AF_INET6, &src, &dst, m, off) == 0) {
418: if (m->m_flags & M_MCAST) {
419: udp6stat.udp6s_noportmcast++;
420: goto bad;
421: }
1.61 itojun 422: udp6stat.udp6s_noport++;
1.53 itojun 423: icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0);
424: m = NULL;
425: }
426:
427: bad:
428: if (m)
429: m_freem(m);
430: return IPPROTO_DONE;
431: }
432: #endif
433:
434: static void
435: udp4_sendup(m, off, src, so)
436: struct mbuf *m;
437: int off; /* offset of data portion */
438: struct sockaddr *src;
439: struct socket *so;
440: {
441: struct mbuf *opts = NULL;
442: struct mbuf *n;
443: struct inpcb *inp = NULL;
444: #ifdef INET6
445: struct in6pcb *in6p = NULL;
446: #endif
447:
448: if (!so)
449: return;
450: switch (so->so_proto->pr_domain->dom_family) {
451: case AF_INET:
452: inp = sotoinpcb(so);
453: break;
454: #ifdef INET6
455: case AF_INET6:
456: in6p = sotoin6pcb(so);
457: break;
458: #endif
459: default:
460: return;
461: }
462:
463: #ifdef IPSEC
464: /* check AH/ESP integrity. */
465: if (so != NULL && ipsec4_in_reject_so(m, so)) {
466: ipsecstat.in_polvio++;
467: return;
468: }
469: #endif /*IPSEC*/
470:
471: if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
472: if (inp && (inp->inp_flags & INP_CONTROLOPTS
473: || so->so_options & SO_TIMESTAMP)) {
474: struct ip *ip = mtod(n, struct ip *);
475: ip_savecontrol(inp, &opts, ip, n);
476: }
477:
478: m_adj(n, off);
479: if (sbappendaddr(&so->so_rcv, src, n,
480: opts) == 0) {
481: m_freem(n);
482: if (opts)
483: m_freem(opts);
484: } else
485: sorwakeup(so);
486: }
487: }
488:
489: #ifdef INET6
490: static void
491: udp6_sendup(m, off, src, so)
492: struct mbuf *m;
493: int off; /* offset of data portion */
494: struct sockaddr *src;
495: struct socket *so;
496: {
497: struct mbuf *opts = NULL;
498: struct mbuf *n;
499: struct in6pcb *in6p = NULL;
500:
501: if (!so)
502: return;
503: if (so->so_proto->pr_domain->dom_family != AF_INET6)
504: return;
505: in6p = sotoin6pcb(so);
506:
507: #ifdef IPSEC
508: /* check AH/ESP integrity. */
509: if (so != NULL && ipsec6_in_reject_so(m, so)) {
510: ipsec6stat.in_polvio++;
511: return;
512: }
513: #endif /*IPSEC*/
514:
515: if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
516: if (in6p && (in6p->in6p_flags & IN6P_CONTROLOPTS
517: || in6p->in6p_socket->so_options & SO_TIMESTAMP)) {
518: struct ip6_hdr *ip6 = mtod(n, struct ip6_hdr *);
519: ip6_savecontrol(in6p, &opts, ip6, n);
520: }
521:
522: m_adj(n, off);
523: if (sbappendaddr(&so->so_rcv, src, n, opts) == 0) {
524: m_freem(n);
525: if (opts)
526: m_freem(opts);
527: udp6stat.udp6s_fullsock++;
528: } else
529: sorwakeup(so);
530: }
531: }
532: #endif
533:
534: static int
535: udp4_realinput(src, dst, m, off)
536: struct sockaddr_in *src;
537: struct sockaddr_in *dst;
538: struct mbuf *m;
539: int off; /* offset of udphdr */
540: {
541: u_int16_t *sport, *dport;
542: int rcvcnt;
543: struct in_addr *src4, *dst4;
544: struct inpcb *inp;
545:
546: rcvcnt = 0;
547: off += sizeof(struct udphdr); /* now, offset of payload */
548:
549: if (src->sin_family != AF_INET || dst->sin_family != AF_INET)
550: goto bad;
551:
552: src4 = &src->sin_addr;
553: sport = &src->sin_port;
554: dst4 = &dst->sin_addr;
555: dport = &dst->sin_port;
556:
557: if (IN_MULTICAST(src4->s_addr) ||
558: in_broadcast(*dst4, m->m_pkthdr.rcvif)) {
559: struct inpcb *last;
560: /*
561: * Deliver a multicast or broadcast datagram to *all* sockets
562: * for which the local and remote addresses and ports match
563: * those of the incoming datagram. This allows more than
564: * one process to receive multi/broadcasts on the same port.
565: * (This really ought to be done for unicast datagrams as
566: * well, but that would cause problems with existing
567: * applications that open both address-specific sockets and
568: * a wildcard socket listening to the same port -- they would
569: * end up receiving duplicates of every unicast datagram.
570: * Those applications open the multiple sockets to overcome an
571: * inadequacy of the UDP socket interface, but for backwards
572: * compatibility we avoid the problem here rather than
573: * fixing the interface. Maybe 4.5BSD will remedy this?)
574: */
575:
576: /*
577: * KAME note: usually we drop udpiphdr from mbuf here.
578: * we need udpiphdr for iPsec processing so we do that later.
579: */
580: /*
581: * Locate pcb(s) for datagram.
582: */
583: for (inp = udbtable.inpt_queue.cqh_first;
584: inp != (struct inpcb *)&udbtable.inpt_queue;
585: inp = inp->inp_queue.cqe_next) {
586: if (inp->inp_lport != *dport)
587: continue;
588: if (!in_nullhost(inp->inp_laddr)) {
589: if (!in_hosteq(inp->inp_laddr, *dst4))
590: continue;
591: }
592: if (!in_nullhost(inp->inp_faddr)) {
593: if (!in_hosteq(inp->inp_faddr, *src4) ||
594: inp->inp_fport != *sport)
595: continue;
596: }
597:
598: last = inp;
599: udp4_sendup(m, off, (struct sockaddr *)src,
600: inp->inp_socket);
601: rcvcnt++;
602:
603: /*
604: * Don't look for additional matches if this one does
605: * not have either the SO_REUSEPORT or SO_REUSEADDR
606: * socket options set. This heuristic avoids searching
607: * through all pcbs in the common case of a non-shared
608: * port. It assumes that an application will never
609: * clear these options after setting them.
610: */
611: if ((inp->inp_socket->so_options &
612: (SO_REUSEPORT|SO_REUSEADDR)) == 0)
613: break;
614: }
615:
616: #if 0
617: if (last == NULL) {
618: /*
619: * No matching pcb found; discard datagram.
620: * (No need to send an ICMP Port Unreachable
621: * for a broadcast or multicast datgram.)
622: */
623: udpstat.udps_noportbcast++;
624: goto bad;
625: }
626: #endif
627: } else {
628: /*
629: * Locate pcb for datagram.
630: */
631: inp = in_pcblookup_connect(&udbtable, *src4, *sport, *dst4, *dport);
632: if (inp == 0) {
633: ++udpstat.udps_pcbhashmiss;
634: inp = in_pcblookup_bind(&udbtable, *dst4, *dport);
635: if (inp == 0) {
636: #if 0
637: struct mbuf *n;
638:
639: if (m->m_flags & (M_BCAST | M_MCAST)) {
640: udpstat.udps_noportbcast++;
641: goto bad;
642: }
1.61 itojun 643: udpstat.udps_noport++;
1.64 ws 644: #ifdef IPKDB
1.53 itojun 645: if (checkipkdb(src4, *sport, *dport, m, off,
646: m->m_pkthdr.len - off)) {
647: /*
648: * It was a debugger connect packet,
649: * just drop it now
650: */
651: goto bad;
652: }
653: #endif
654: if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
655: icmp_error(n, ICMP_UNREACH,
656: ICMP_UNREACH_PORT, 0, 0);
657: }
658: #endif
659: return rcvcnt;
660: }
661: }
662:
663: udp4_sendup(m, off, (struct sockaddr *)src, inp->inp_socket);
664: rcvcnt++;
665: }
666:
667: bad:
668: return rcvcnt;
669: }
670:
671: #ifdef INET6
672: static int
673: in6_mcmatch(in6p, ia6, ifp)
674: struct in6pcb *in6p;
1.66 augustss 675: struct in6_addr *ia6;
1.53 itojun 676: struct ifnet *ifp;
677: {
678: struct ip6_moptions *im6o = in6p->in6p_moptions;
679: struct in6_multi_mship *imm;
680:
681: if (im6o == NULL)
682: return 0;
683:
684: for (imm = im6o->im6o_memberships.lh_first; imm != NULL;
685: imm = imm->i6mm_chain.le_next) {
686: if ((ifp == NULL ||
687: imm->i6mm_maddr->in6m_ifp == ifp) &&
688: IN6_ARE_ADDR_EQUAL(&imm->i6mm_maddr->in6m_addr,
689: ia6))
690: return 1;
691: }
692: return 0;
693: }
694:
695: static int
696: udp6_realinput(af, src, dst, m, off)
697: int af; /* af on packet */
698: struct sockaddr_in6 *src;
699: struct sockaddr_in6 *dst;
700: struct mbuf *m;
701: int off; /* offset of udphdr */
702: {
703: u_int16_t *sport, *dport;
704: int rcvcnt;
705: struct in6_addr *src6, *dst6;
706: struct in_addr *src4;
707: struct in6pcb *in6p;
708:
709: rcvcnt = 0;
710: off += sizeof(struct udphdr); /* now, offset of payload */
711:
712: if (af != AF_INET && af != AF_INET6)
713: goto bad;
714: if (src->sin6_family != AF_INET6 || dst->sin6_family != AF_INET6)
715: goto bad;
716:
717: src6 = &src->sin6_addr;
718: sport = &src->sin6_port;
719: dst6 = &dst->sin6_addr;
720: dport = &dst->sin6_port;
721: src4 = (struct in_addr *)&src->sin6_addr.s6_addr32[12];
722:
723: if (IN6_IS_ADDR_MULTICAST(dst6)
724: || (af == AF_INET && IN_MULTICAST(src4->s_addr))) {
725: struct in6pcb *last;
726: /*
727: * Deliver a multicast or broadcast datagram to *all* sockets
728: * for which the local and remote addresses and ports match
729: * those of the incoming datagram. This allows more than
730: * one process to receive multi/broadcasts on the same port.
731: * (This really ought to be done for unicast datagrams as
732: * well, but that would cause problems with existing
733: * applications that open both address-specific sockets and
734: * a wildcard socket listening to the same port -- they would
735: * end up receiving duplicates of every unicast datagram.
736: * Those applications open the multiple sockets to overcome an
737: * inadequacy of the UDP socket interface, but for backwards
738: * compatibility we avoid the problem here rather than
739: * fixing the interface. Maybe 4.5BSD will remedy this?)
740: */
741:
742: /*
743: * KAME note: usually we drop udpiphdr from mbuf here.
744: * we need udpiphdr for iPsec processing so we do that later.
745: */
746: /*
747: * Locate pcb(s) for datagram.
748: */
749: for (in6p = udb6.in6p_next; in6p != &udb6;
750: in6p = in6p->in6p_next) {
751: if (in6p->in6p_lport != *dport)
752: continue;
753: if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) {
754: if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, dst6)
755: && !in6_mcmatch(in6p, dst6, m->m_pkthdr.rcvif))
756: continue;
757: }
1.55 itojun 758: #ifndef INET6_BINDV6ONLY
759: else {
760: if (IN6_IS_ADDR_V4MAPPED(dst6)
761: && (in6p->in6p_flags & IN6P_BINDV6ONLY))
762: continue;
763: }
764: #endif
1.53 itojun 765: if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
766: if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, src6)
767: || in6p->in6p_fport != *sport)
768: continue;
769: }
1.55 itojun 770: #ifndef INET6_BINDV6ONLY
771: else {
772: if (IN6_IS_ADDR_V4MAPPED(src6)
773: && (in6p->in6p_flags & IN6P_BINDV6ONLY))
774: continue;
775: }
776: #endif
1.53 itojun 777:
778: last = in6p;
779: udp6_sendup(m, off, (struct sockaddr *)src,
780: in6p->in6p_socket);
781: rcvcnt++;
782:
783: /*
784: * Don't look for additional matches if this one does
785: * not have either the SO_REUSEPORT or SO_REUSEADDR
786: * socket options set. This heuristic avoids searching
787: * through all pcbs in the common case of a non-shared
788: * port. It assumes that an application will never
789: * clear these options after setting them.
790: */
791: if ((in6p->in6p_socket->so_options &
792: (SO_REUSEPORT|SO_REUSEADDR)) == 0)
793: break;
794: }
795:
796: #if 0
797: if (last == NULL) {
798: /*
799: * No matching pcb found; discard datagram.
800: * (No need to send an ICMP Port Unreachable
801: * for a broadcast or multicast datgram.)
802: */
803: switch (af) {
804: case AF_INET:
805: udpstat.udps_noportbcast++;
806: break;
807: case AF_INET6:
808: udp6stat.udp6s_noportmcast++;
809: break;
810: }
811: goto bad;
812: }
813: #endif
814: } else {
815: /*
816: * Locate pcb for datagram.
817: */
818: in6p = in6_pcblookup_connect(&udb6, src6, *sport,
819: dst6, *dport, 0);
820: if (in6p == 0) {
821: ++udpstat.udps_pcbhashmiss;
822: in6p = in6_pcblookup_bind(&udb6, dst6, *dport, 0);
823: if (in6p == 0) {
824: #if 0
825: struct mbuf *n;
826: n = m_copy(m, 0, M_COPYALL);
827: switch (af) {
828: case AF_INET:
829: if (m->m_flags & (M_BCAST | M_MCAST)) {
830: udpstat.udps_noportbcast++;
831: goto bad;
832: }
1.61 itojun 833: udpstat.udps_noport++;
1.53 itojun 834: if (n != NULL)
835: icmp_error(n, ICMP_UNREACH,
836: ICMP_UNREACH_PORT, 0, 0);
837: break;
838: case AF_INET6:
839: if (m->m_flags & M_MCAST) {
840: udp6stat.udp6s_noportmcast++;
841: goto bad;
842: }
1.61 itojun 843: udp6stat.udp6s_noport++;
1.53 itojun 844: if (n != NULL)
845: icmp6_error(n, ICMP6_DST_UNREACH,
846: ICMP6_DST_UNREACH_NOPORT, 0);
847: break;
848: }
849: #endif
850:
851: return rcvcnt;
852: }
853: }
854:
855: udp6_sendup(m, off, (struct sockaddr *)src, in6p->in6p_socket);
856: rcvcnt++;
857: }
858:
859: bad:
860: return rcvcnt;
861: }
862: #endif
863:
1.56 itojun 864: #else /*UDP6*/
865:
1.53 itojun 866: void
867: #if __STDC__
868: udp_input(struct mbuf *m, ...)
869: #else
870: udp_input(m, va_alist)
871: struct mbuf *m;
872: va_dcl
873: #endif
874: {
1.48 itojun 875: int proto;
1.66 augustss 876: struct ip *ip;
877: struct udphdr *uh;
878: struct inpcb *inp;
1.1 cgd 879: struct mbuf *opts = 0;
880: int len;
881: struct ip save_ip;
1.27 christos 882: int iphlen;
883: va_list ap;
1.34 mycroft 884: struct sockaddr_in udpsrc;
1.48 itojun 885: struct sockaddr *sa;
1.27 christos 886:
887: va_start(ap, m);
888: iphlen = va_arg(ap, int);
1.48 itojun 889: proto = va_arg(ap, int);
1.27 christos 890: va_end(ap);
1.1 cgd 891:
892: udpstat.udps_ipackets++;
893:
894: /*
895: * Strip IP options, if any; should skip this,
896: * make available to user, and use on returned packets,
897: * but we don't yet have a way to check the checksum
898: * with options still present.
899: */
900: if (iphlen > sizeof (struct ip)) {
901: ip_stripoptions(m, (struct mbuf *)0);
902: iphlen = sizeof(struct ip);
903: }
904:
905: /*
906: * Get IP and UDP header together in first mbuf.
907: */
908: ip = mtod(m, struct ip *);
909: if (m->m_len < iphlen + sizeof(struct udphdr)) {
910: if ((m = m_pullup(m, iphlen + sizeof(struct udphdr))) == 0) {
911: udpstat.udps_hdrops++;
912: return;
913: }
914: ip = mtod(m, struct ip *);
915: }
916: uh = (struct udphdr *)((caddr_t)ip + iphlen);
1.57 itojun 917:
918: /* destination port of 0 is illegal, based on RFC768. */
919: if (uh->uh_dport == 0)
920: goto bad;
1.1 cgd 921:
922: /*
923: * Make mbuf data length reflect UDP length.
924: * If not enough data to reflect UDP length, drop.
925: */
1.15 cgd 926: len = ntohs((u_int16_t)uh->uh_ulen);
1.47 mycroft 927: if (ip->ip_len != iphlen + len) {
928: if (ip->ip_len < iphlen + len) {
1.1 cgd 929: udpstat.udps_badlen++;
930: goto bad;
931: }
1.47 mycroft 932: m_adj(m, iphlen + len - ip->ip_len);
1.1 cgd 933: }
934: /*
935: * Save a copy of the IP header in case we want restore it
936: * for sending an ICMP error message in response.
937: */
938: save_ip = *ip;
939:
940: /*
941: * Checksum extended UDP header and data.
942: */
1.29 mrg 943: if (uh->uh_sum) {
1.25 cgd 944: bzero(((struct ipovly *)ip)->ih_x1,
945: sizeof ((struct ipovly *)ip)->ih_x1);
1.1 cgd 946: ((struct ipovly *)ip)->ih_len = uh->uh_ulen;
1.46 mycroft 947: if (in_cksum(m, len + sizeof (struct ip)) != 0) {
1.1 cgd 948: udpstat.udps_badsum++;
949: m_freem(m);
950: return;
951: }
952: }
1.13 mycroft 953:
1.48 itojun 954: /*
955: * Construct sockaddr format source address.
956: */
957: udpsrc.sin_family = AF_INET;
958: udpsrc.sin_len = sizeof(struct sockaddr_in);
959: udpsrc.sin_addr = ip->ip_src;
960: udpsrc.sin_port = uh->uh_sport;
961: bzero((caddr_t)udpsrc.sin_zero, sizeof(udpsrc.sin_zero));
962:
1.16 mycroft 963: if (IN_MULTICAST(ip->ip_dst.s_addr) ||
1.13 mycroft 964: in_broadcast(ip->ip_dst, m->m_pkthdr.rcvif)) {
1.40 thorpej 965: struct inpcb *last;
1.4 hpeyerl 966: /*
967: * Deliver a multicast or broadcast datagram to *all* sockets
968: * for which the local and remote addresses and ports match
969: * those of the incoming datagram. This allows more than
970: * one process to receive multi/broadcasts on the same port.
971: * (This really ought to be done for unicast datagrams as
972: * well, but that would cause problems with existing
973: * applications that open both address-specific sockets and
974: * a wildcard socket listening to the same port -- they would
975: * end up receiving duplicates of every unicast datagram.
976: * Those applications open the multiple sockets to overcome an
977: * inadequacy of the UDP socket interface, but for backwards
978: * compatibility we avoid the problem here rather than
1.13 mycroft 979: * fixing the interface. Maybe 4.5BSD will remedy this?)
1.4 hpeyerl 980: */
1.13 mycroft 981:
1.48 itojun 982: iphlen += sizeof(struct udphdr);
1.4 hpeyerl 983: /*
1.48 itojun 984: * KAME note: usually we drop udpiphdr from mbuf here.
985: * we need udpiphdr for iPsec processing so we do that later.
1.4 hpeyerl 986: */
987: /*
988: * Locate pcb(s) for datagram.
989: * (Algorithm copied from raw_intr().)
990: */
991: last = NULL;
1.22 cgd 992: for (inp = udbtable.inpt_queue.cqh_first;
993: inp != (struct inpcb *)&udbtable.inpt_queue;
994: inp = inp->inp_queue.cqe_next) {
1.4 hpeyerl 995: if (inp->inp_lport != uh->uh_dport)
996: continue;
1.34 mycroft 997: if (!in_nullhost(inp->inp_laddr)) {
998: if (!in_hosteq(inp->inp_laddr, ip->ip_dst))
1.4 hpeyerl 999: continue;
1000: }
1.34 mycroft 1001: if (!in_nullhost(inp->inp_faddr)) {
1002: if (!in_hosteq(inp->inp_faddr, ip->ip_src) ||
1.4 hpeyerl 1003: inp->inp_fport != uh->uh_sport)
1004: continue;
1005: }
1006:
1007: if (last != NULL) {
1008: struct mbuf *n;
1009:
1.48 itojun 1010: #ifdef IPSEC
1011: /* check AH/ESP integrity. */
1012: if (last != NULL && ipsec4_in_reject(m, last)) {
1013: ipsecstat.in_polvio++;
1014: /* do not inject data to pcb */
1015: } else
1016: #endif /*IPSEC*/
1.4 hpeyerl 1017: if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
1.40 thorpej 1018: if (last->inp_flags & INP_CONTROLOPTS
1019: || last->inp_socket->so_options &
1020: SO_TIMESTAMP) {
1021: ip_savecontrol(last, &opts,
1022: ip, n);
1023: }
1.49 drochner 1024: m_adj(n, iphlen);
1.48 itojun 1025: sa = (struct sockaddr *)&udpsrc;
1.40 thorpej 1026: if (sbappendaddr(
1027: &last->inp_socket->so_rcv,
1.48 itojun 1028: sa, n, opts) == 0) {
1.4 hpeyerl 1029: m_freem(n);
1.40 thorpej 1030: if (opts)
1031: m_freem(opts);
1.13 mycroft 1032: } else
1.40 thorpej 1033: sorwakeup(last->inp_socket);
1034: opts = 0;
1.4 hpeyerl 1035: }
1036: }
1.40 thorpej 1037: last = inp;
1.4 hpeyerl 1038: /*
1.13 mycroft 1039: * Don't look for additional matches if this one does
1040: * not have either the SO_REUSEPORT or SO_REUSEADDR
1041: * socket options set. This heuristic avoids searching
1042: * through all pcbs in the common case of a non-shared
1043: * port. It * assumes that an application will never
1044: * clear these options after setting them.
1.4 hpeyerl 1045: */
1.40 thorpej 1046: if ((last->inp_socket->so_options &
1047: (SO_REUSEPORT|SO_REUSEADDR)) == 0)
1.4 hpeyerl 1048: break;
1049: }
1.6 mycroft 1050:
1.4 hpeyerl 1051: if (last == NULL) {
1052: /*
1053: * No matching pcb found; discard datagram.
1054: * (No need to send an ICMP Port Unreachable
1055: * for a broadcast or multicast datgram.)
1056: */
1.13 mycroft 1057: udpstat.udps_noportbcast++;
1.4 hpeyerl 1058: goto bad;
1059: }
1.48 itojun 1060: #ifdef IPSEC
1061: /* check AH/ESP integrity. */
1062: if (last != NULL && ipsec4_in_reject(m, last)) {
1063: ipsecstat.in_polvio++;
1064: goto bad;
1065: }
1066: #endif /*IPSEC*/
1.40 thorpej 1067: if (last->inp_flags & INP_CONTROLOPTS ||
1068: last->inp_socket->so_options & SO_TIMESTAMP)
1069: ip_savecontrol(last, &opts, ip, m);
1.49 drochner 1070: m->m_len -= iphlen;
1071: m->m_pkthdr.len -= iphlen;
1072: m->m_data += iphlen;
1.48 itojun 1073: sa = (struct sockaddr *)&udpsrc;
1074: if (sbappendaddr(&last->inp_socket->so_rcv, sa, m, opts) == 0) {
1.13 mycroft 1075: udpstat.udps_fullsock++;
1.4 hpeyerl 1076: goto bad;
1.13 mycroft 1077: }
1.40 thorpej 1078: sorwakeup(last->inp_socket);
1.4 hpeyerl 1079: return;
1080: }
1.1 cgd 1081: /*
1082: * Locate pcb for datagram.
1083: */
1.35 mycroft 1084: inp = in_pcblookup_connect(&udbtable, ip->ip_src, uh->uh_sport,
1.26 mycroft 1085: ip->ip_dst, uh->uh_dport);
1086: if (inp == 0) {
1087: ++udpstat.udps_pcbhashmiss;
1.35 mycroft 1088: inp = in_pcblookup_bind(&udbtable, ip->ip_dst, uh->uh_dport);
1.18 mycroft 1089: if (inp == 0) {
1090: if (m->m_flags & (M_BCAST | M_MCAST)) {
1091: udpstat.udps_noportbcast++;
1092: goto bad;
1093: }
1.61 itojun 1094: udpstat.udps_noport++;
1.18 mycroft 1095: *ip = save_ip;
1.64 ws 1096: #ifdef IPKDB
1.38 ws 1097: if (checkipkdb(&ip->ip_src,
1098: uh->uh_sport,
1099: uh->uh_dport,
1100: m,
1101: iphlen + sizeof(struct udphdr),
1102: len - sizeof(struct udphdr)))
1.37 ws 1103: /* It was a debugger connect packet, just drop it now */
1104: goto bad;
1105: #endif
1.18 mycroft 1106: icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0);
1107: return;
1.13 mycroft 1108: }
1.1 cgd 1109: }
1.48 itojun 1110: #ifdef IPSEC
1111: if (inp != NULL && ipsec4_in_reject(m, inp)) {
1112: ipsecstat.in_polvio++;
1113: goto bad;
1114: }
1115: #endif /*IPSEC*/
1.1 cgd 1116:
1117: /*
1118: * Stuff source address and datagram in user buffer.
1119: */
1.40 thorpej 1120: if (inp->inp_flags & INP_CONTROLOPTS ||
1121: inp->inp_socket->so_options & SO_TIMESTAMP)
1122: ip_savecontrol(inp, &opts, ip, m);
1.1 cgd 1123: iphlen += sizeof(struct udphdr);
1124: m->m_len -= iphlen;
1125: m->m_pkthdr.len -= iphlen;
1126: m->m_data += iphlen;
1.48 itojun 1127: sa = (struct sockaddr *)&udpsrc;
1128: if (sbappendaddr(&inp->inp_socket->so_rcv, sa, m, opts) == 0) {
1.1 cgd 1129: udpstat.udps_fullsock++;
1130: goto bad;
1131: }
1132: sorwakeup(inp->inp_socket);
1133: return;
1134: bad:
1135: m_freem(m);
1136: if (opts)
1137: m_freem(opts);
1138: }
1.56 itojun 1139: #endif /*UDP6*/
1.1 cgd 1140:
1141: /*
1142: * Notify a udp user of an asynchronous error;
1143: * just wake up so that he can collect error status.
1144: */
1.7 mycroft 1145: static void
1.1 cgd 1146: udp_notify(inp, errno)
1.66 augustss 1147: struct inpcb *inp;
1.7 mycroft 1148: int errno;
1.1 cgd 1149: {
1.34 mycroft 1150:
1.1 cgd 1151: inp->inp_socket->so_error = errno;
1152: sorwakeup(inp->inp_socket);
1153: sowwakeup(inp->inp_socket);
1154: }
1155:
1.27 christos 1156: void *
1157: udp_ctlinput(cmd, sa, v)
1.1 cgd 1158: int cmd;
1159: struct sockaddr *sa;
1.27 christos 1160: void *v;
1.1 cgd 1161: {
1.66 augustss 1162: struct ip *ip = v;
1163: struct udphdr *uh;
1.18 mycroft 1164: void (*notify) __P((struct inpcb *, int)) = udp_notify;
1.21 mycroft 1165: int errno;
1.1 cgd 1166:
1.53 itojun 1167: if (sa->sa_family != AF_INET
1168: || sa->sa_len != sizeof(struct sockaddr_in))
1.51 itojun 1169: return NULL;
1.20 mycroft 1170: if ((unsigned)cmd >= PRC_NCMDS)
1.27 christos 1171: return NULL;
1.20 mycroft 1172: errno = inetctlerrmap[cmd];
1.18 mycroft 1173: if (PRC_IS_REDIRECT(cmd))
1.19 mycroft 1174: notify = in_rtchange, ip = 0;
1.18 mycroft 1175: else if (cmd == PRC_HOSTDEAD)
1.19 mycroft 1176: ip = 0;
1.23 cgd 1177: else if (errno == 0)
1.27 christos 1178: return NULL;
1.19 mycroft 1179: if (ip) {
1.1 cgd 1180: uh = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2));
1.34 mycroft 1181: in_pcbnotify(&udbtable, satosin(sa)->sin_addr, uh->uh_dport,
1182: ip->ip_src, uh->uh_sport, errno, notify);
1.53 itojun 1183:
1184: /* XXX mapped address case */
1.19 mycroft 1185: } else
1.34 mycroft 1186: in_pcbnotifyall(&udbtable, satosin(sa)->sin_addr, errno,
1187: notify);
1.27 christos 1188: return NULL;
1.1 cgd 1189: }
1190:
1.7 mycroft 1191: int
1.27 christos 1192: #if __STDC__
1193: udp_output(struct mbuf *m, ...)
1194: #else
1195: udp_output(m, va_alist)
1196: struct mbuf *m;
1197: va_dcl
1198: #endif
1199: {
1.66 augustss 1200: struct inpcb *inp;
1201: struct udpiphdr *ui;
1202: int len = m->m_pkthdr.len;
1.31 mycroft 1203: int error = 0;
1.27 christos 1204: va_list ap;
1205:
1206: va_start(ap, m);
1207: inp = va_arg(ap, struct inpcb *);
1208: va_end(ap);
1.1 cgd 1209:
1210: /*
1211: * Calculate data length and get a mbuf
1212: * for UDP and IP headers.
1213: */
1.13 mycroft 1214: M_PREPEND(m, sizeof(struct udpiphdr), M_DONTWAIT);
1215: if (m == 0) {
1216: error = ENOBUFS;
1.39 thorpej 1217: goto release;
1218: }
1219:
1220: /*
1221: * Compute the packet length of the IP header, and
1222: * punt if the length looks bogus.
1223: */
1224: if ((len + sizeof(struct udpiphdr)) > IP_MAXPACKET) {
1225: error = EMSGSIZE;
1.13 mycroft 1226: goto release;
1227: }
1.1 cgd 1228:
1229: /*
1230: * Fill in mbuf with extended UDP header
1231: * and addresses and length put into network format.
1232: */
1233: ui = mtod(m, struct udpiphdr *);
1.25 cgd 1234: bzero(ui->ui_x1, sizeof ui->ui_x1);
1.1 cgd 1235: ui->ui_pr = IPPROTO_UDP;
1.15 cgd 1236: ui->ui_len = htons((u_int16_t)len + sizeof (struct udphdr));
1.1 cgd 1237: ui->ui_src = inp->inp_laddr;
1238: ui->ui_dst = inp->inp_faddr;
1239: ui->ui_sport = inp->inp_lport;
1240: ui->ui_dport = inp->inp_fport;
1241: ui->ui_ulen = ui->ui_len;
1242:
1243: /*
1244: * Stuff checksum and output datagram.
1245: */
1246: ui->ui_sum = 0;
1247: if (udpcksum) {
1248: if ((ui->ui_sum = in_cksum(m, sizeof (struct udpiphdr) + len)) == 0)
1249: ui->ui_sum = 0xffff;
1250: }
1251: ((struct ip *)ui)->ip_len = sizeof (struct udpiphdr) + len;
1252: ((struct ip *)ui)->ip_ttl = inp->inp_ip.ip_ttl; /* XXX */
1253: ((struct ip *)ui)->ip_tos = inp->inp_ip.ip_tos; /* XXX */
1254: udpstat.udps_opackets++;
1.48 itojun 1255:
1256: #ifdef IPSEC
1.63 itojun 1257: ipsec_setsocket(m, inp->inp_socket);
1.48 itojun 1258: #endif /*IPSEC*/
1259:
1.31 mycroft 1260: return (ip_output(m, inp->inp_options, &inp->inp_route,
1.12 mycroft 1261: inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST),
1.31 mycroft 1262: inp->inp_moptions));
1.1 cgd 1263:
1264: release:
1265: m_freem(m);
1266: return (error);
1267: }
1268:
1.42 thorpej 1269: int udp_sendspace = 9216; /* really max datagram size */
1270: int udp_recvspace = 40 * (1024 + sizeof(struct sockaddr_in));
1.1 cgd 1271: /* 40 1K datagrams */
1272:
1273: /*ARGSUSED*/
1.7 mycroft 1274: int
1.31 mycroft 1275: udp_usrreq(so, req, m, nam, control, p)
1.1 cgd 1276: struct socket *so;
1277: int req;
1.31 mycroft 1278: struct mbuf *m, *nam, *control;
1.30 mycroft 1279: struct proc *p;
1.1 cgd 1280: {
1.66 augustss 1281: struct inpcb *inp;
1.1 cgd 1282: int s;
1.66 augustss 1283: int error = 0;
1.1 cgd 1284:
1285: if (req == PRU_CONTROL)
1.31 mycroft 1286: return (in_control(so, (long)m, (caddr_t)nam,
1.30 mycroft 1287: (struct ifnet *)control, p));
1.59 thorpej 1288:
1.60 thorpej 1289: if (req == PRU_PURGEIF) {
1290: in_purgeif((struct ifnet *)control);
1291: in_pcbpurgeif(&udbtable, (struct ifnet *)control);
1.59 thorpej 1292: return (0);
1293: }
1.31 mycroft 1294:
1295: s = splsoftnet();
1296: inp = sotoinpcb(so);
1.32 mycroft 1297: #ifdef DIAGNOSTIC
1298: if (req != PRU_SEND && req != PRU_SENDOOB && control)
1299: panic("udp_usrreq: unexpected control mbuf");
1300: #endif
1.31 mycroft 1301: if (inp == 0 && req != PRU_ATTACH) {
1302: error = EINVAL;
1303: goto release;
1304: }
1305:
1.1 cgd 1306: /*
1307: * Note: need to block udp_input while changing
1308: * the udp pcb queue and/or pcb addresses.
1309: */
1310: switch (req) {
1311:
1312: case PRU_ATTACH:
1.31 mycroft 1313: if (inp != 0) {
1314: error = EISCONN;
1.1 cgd 1315: break;
1316: }
1.31 mycroft 1317: if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
1318: error = soreserve(so, udp_sendspace, udp_recvspace);
1319: if (error)
1320: break;
1321: }
1.18 mycroft 1322: error = in_pcballoc(so, &udbtable);
1.1 cgd 1323: if (error)
1324: break;
1.31 mycroft 1325: inp = sotoinpcb(so);
1326: inp->inp_ip.ip_ttl = ip_defttl;
1.48 itojun 1327: #ifdef IPSEC
1.58 itojun 1328: error = ipsec_init_policy(so, &inp->inp_sp);
1.53 itojun 1329: if (error != 0) {
1.52 itojun 1330: in_pcbdetach(inp);
1.53 itojun 1331: break;
1332: }
1.48 itojun 1333: #endif /*IPSEC*/
1.1 cgd 1334: break;
1335:
1336: case PRU_DETACH:
1.31 mycroft 1337: in_pcbdetach(inp);
1.1 cgd 1338: break;
1339:
1340: case PRU_BIND:
1.31 mycroft 1341: error = in_pcbbind(inp, nam, p);
1.1 cgd 1342: break;
1343:
1344: case PRU_LISTEN:
1345: error = EOPNOTSUPP;
1346: break;
1347:
1348: case PRU_CONNECT:
1.31 mycroft 1349: error = in_pcbconnect(inp, nam);
1350: if (error)
1.1 cgd 1351: break;
1.31 mycroft 1352: soisconnected(so);
1.1 cgd 1353: break;
1354:
1355: case PRU_CONNECT2:
1356: error = EOPNOTSUPP;
1357: break;
1358:
1359: case PRU_DISCONNECT:
1.31 mycroft 1360: /*soisdisconnected(so);*/
1361: so->so_state &= ~SS_ISCONNECTED; /* XXX */
1.1 cgd 1362: in_pcbdisconnect(inp);
1.34 mycroft 1363: inp->inp_laddr = zeroin_addr; /* XXX */
1.35 mycroft 1364: in_pcbstate(inp, INP_BOUND); /* XXX */
1.1 cgd 1365: break;
1366:
1367: case PRU_SHUTDOWN:
1368: socantsendmore(so);
1369: break;
1370:
1.31 mycroft 1371: case PRU_RCVD:
1372: error = EOPNOTSUPP;
1.1 cgd 1373: break;
1374:
1.31 mycroft 1375: case PRU_SEND:
1.32 mycroft 1376: if (control && control->m_len) {
1377: m_freem(control);
1378: m_freem(m);
1379: error = EINVAL;
1380: break;
1381: }
1.31 mycroft 1382: {
1.35 mycroft 1383: struct in_addr laddr; /* XXX */
1.1 cgd 1384:
1.31 mycroft 1385: if (nam) {
1.35 mycroft 1386: laddr = inp->inp_laddr; /* XXX */
1.31 mycroft 1387: if ((so->so_state & SS_ISCONNECTED) != 0) {
1388: error = EISCONN;
1.32 mycroft 1389: goto die;
1.31 mycroft 1390: }
1391: error = in_pcbconnect(inp, nam);
1.32 mycroft 1392: if (error) {
1393: die:
1394: m_freem(m);
1.31 mycroft 1395: break;
1.32 mycroft 1396: }
1.31 mycroft 1397: } else {
1398: if ((so->so_state & SS_ISCONNECTED) == 0) {
1399: error = ENOTCONN;
1.32 mycroft 1400: goto die;
1.31 mycroft 1401: }
1402: }
1.33 mycroft 1403: error = udp_output(m, inp);
1.31 mycroft 1404: if (nam) {
1405: in_pcbdisconnect(inp);
1.35 mycroft 1406: inp->inp_laddr = laddr; /* XXX */
1407: in_pcbstate(inp, INP_BOUND); /* XXX */
1.31 mycroft 1408: }
1409: }
1.1 cgd 1410: break;
1411:
1412: case PRU_SENSE:
1413: /*
1414: * stat: don't bother with a blocksize.
1415: */
1.31 mycroft 1416: splx(s);
1.1 cgd 1417: return (0);
1418:
1.31 mycroft 1419: case PRU_RCVOOB:
1420: error = EOPNOTSUPP;
1421: break;
1422:
1.1 cgd 1423: case PRU_SENDOOB:
1.32 mycroft 1424: m_freem(control);
1.31 mycroft 1425: m_freem(m);
1.1 cgd 1426: error = EOPNOTSUPP;
1427: break;
1428:
1.31 mycroft 1429: case PRU_SOCKADDR:
1430: in_setsockaddr(inp, nam);
1431: break;
1432:
1433: case PRU_PEERADDR:
1434: in_setpeeraddr(inp, nam);
1435: break;
1.1 cgd 1436:
1437: default:
1438: panic("udp_usrreq");
1439: }
1440:
1441: release:
1.31 mycroft 1442: splx(s);
1.1 cgd 1443: return (error);
1.13 mycroft 1444: }
1445:
1446: /*
1447: * Sysctl for udp variables.
1448: */
1.27 christos 1449: int
1.13 mycroft 1450: udp_sysctl(name, namelen, oldp, oldlenp, newp, newlen)
1451: int *name;
1452: u_int namelen;
1453: void *oldp;
1454: size_t *oldlenp;
1455: void *newp;
1456: size_t newlen;
1457: {
1458: /* All sysctl names at this level are terminal. */
1459: if (namelen != 1)
1460: return (ENOTDIR);
1461:
1462: switch (name[0]) {
1463: case UDPCTL_CHECKSUM:
1464: return (sysctl_int(oldp, oldlenp, newp, newlen, &udpcksum));
1.42 thorpej 1465: case UDPCTL_SENDSPACE:
1466: return (sysctl_int(oldp, oldlenp, newp, newlen,
1467: &udp_sendspace));
1468: case UDPCTL_RECVSPACE:
1469: return (sysctl_int(oldp, oldlenp, newp, newlen,
1470: &udp_recvspace));
1.13 mycroft 1471: default:
1472: return (ENOPROTOOPT);
1473: }
1474: /* NOTREACHED */
1.1 cgd 1475: }
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