Annotation of src/sys/netinet/udp_usrreq.c, Revision 1.222
1.222 ! pooka 1: /* $NetBSD: udp_usrreq.c,v 1.221 2015/05/02 17:18:03 rtr Exp $ */
1.48 itojun 2:
3: /*
4: * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
5: * All rights reserved.
1.94 itojun 6: *
1.48 itojun 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.
1.94 itojun 18: *
1.48 itojun 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.
1.104 agc 44: * 3. Neither the name of the University nor the names of its contributors
1.1 cgd 45: * may be used to endorse or promote products derived from this software
46: * without specific prior written permission.
47: *
48: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
49: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
50: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
51: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
52: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
53: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
54: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
55: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
56: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
57: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
58: * SUCH DAMAGE.
59: *
1.44 thorpej 60: * @(#)udp_usrreq.c 8.6 (Berkeley) 5/23/95
1.1 cgd 61: */
1.91 lukem 62:
1.198 rmind 63: /*
64: * UDP protocol implementation.
65: * Per RFC 768, August, 1980.
66: */
67:
1.91 lukem 68: #include <sys/cdefs.h>
1.222 ! pooka 69: __KERNEL_RCSID(0, "$NetBSD: udp_usrreq.c,v 1.221 2015/05/02 17:18:03 rtr Exp $");
1.50 thorpej 70:
1.222 ! pooka 71: #ifdef _KERNEL_OPT
1.77 soda 72: #include "opt_inet.h"
1.174 christos 73: #include "opt_compat_netbsd.h"
1.50 thorpej 74: #include "opt_ipsec.h"
1.78 thorpej 75: #include "opt_inet_csum.h"
1.64 ws 76: #include "opt_ipkdb.h"
1.101 martin 77: #include "opt_mbuftrace.h"
1.222 ! pooka 78: #endif
1.1 cgd 79:
1.5 mycroft 80: #include <sys/param.h>
81: #include <sys/mbuf.h>
1.192 pooka 82: #include <sys/once.h>
1.5 mycroft 83: #include <sys/protosw.h>
84: #include <sys/socket.h>
85: #include <sys/socketvar.h>
1.27 christos 86: #include <sys/systm.h>
87: #include <sys/proc.h>
1.53 itojun 88: #include <sys/domain.h>
1.27 christos 89: #include <sys/sysctl.h>
1.1 cgd 90:
1.5 mycroft 91: #include <net/if.h>
92: #include <net/route.h>
1.1 cgd 93:
1.5 mycroft 94: #include <netinet/in.h>
95: #include <netinet/in_systm.h>
1.15 cgd 96: #include <netinet/in_var.h>
1.5 mycroft 97: #include <netinet/ip.h>
98: #include <netinet/in_pcb.h>
99: #include <netinet/ip_var.h>
100: #include <netinet/ip_icmp.h>
101: #include <netinet/udp.h>
102: #include <netinet/udp_var.h>
1.166 thorpej 103: #include <netinet/udp_private.h>
1.1 cgd 104:
1.53 itojun 105: #ifdef INET6
106: #include <netinet/ip6.h>
107: #include <netinet/icmp6.h>
108: #include <netinet6/ip6_var.h>
1.167 thorpej 109: #include <netinet6/ip6_private.h>
1.53 itojun 110: #include <netinet6/in6_pcb.h>
111: #include <netinet6/udp6_var.h>
1.168 thorpej 112: #include <netinet6/udp6_private.h>
1.53 itojun 113: #endif
114:
115: #ifndef INET6
116: /* always need ip6.h for IP6_EXTHDR_GET */
117: #include <netinet/ip6.h>
118: #endif
119:
1.190 christos 120: #ifdef IPSEC
1.105 jonathan 121: #include <netipsec/ipsec.h>
1.169 thorpej 122: #include <netipsec/ipsec_var.h>
123: #include <netipsec/ipsec_private.h>
1.147 christos 124: #include <netipsec/esp.h>
1.105 jonathan 125: #ifdef INET6
126: #include <netipsec/ipsec6.h>
127: #endif
1.190 christos 128: #endif /* IPSEC */
1.105 jonathan 129:
1.174 christos 130: #ifdef COMPAT_50
131: #include <compat/sys/socket.h>
132: #endif
133:
1.64 ws 134: #ifdef IPKDB
135: #include <ipkdb/ipkdb.h>
136: #endif
137:
1.8 mycroft 138: int udpcksum = 1;
1.141 yamt 139: int udp_do_loopback_cksum = 0;
1.93 matt 140:
141: struct inpcbtable udbtable;
1.164 thorpej 142:
1.166 thorpej 143: percpu_t *udpstat_percpu;
1.8 mycroft 144:
1.72 itojun 145: #ifdef INET
1.190 christos 146: #ifdef IPSEC
1.144 manu 147: static int udp4_espinudp (struct mbuf **, int, struct sockaddr *,
1.130 manu 148: struct socket *);
1.189 christos 149: #endif
1.119 matt 150: static void udp4_sendup (struct mbuf *, int, struct sockaddr *,
151: struct socket *);
152: static int udp4_realinput (struct sockaddr_in *, struct sockaddr_in *,
1.144 manu 153: struct mbuf **, int);
1.129 yamt 154: static int udp4_input_checksum(struct mbuf *, const struct udphdr *, int, int);
1.72 itojun 155: #endif
156: #ifdef INET
1.119 matt 157: static void udp_notify (struct inpcb *, int);
1.72 itojun 158: #endif
1.7 mycroft 159:
1.26 mycroft 160: #ifndef UDBHASHSIZE
161: #define UDBHASHSIZE 128
162: #endif
163: int udbhashsize = UDBHASHSIZE;
164:
1.196 rmind 165: /*
166: * For send - really max datagram size; for receive - 40 1K datagrams.
167: */
168: static int udp_sendspace = 9216;
169: static int udp_recvspace = 40 * (1024 + sizeof(struct sockaddr_in));
170:
1.98 matt 171: #ifdef MBUFTRACE
1.150 dogcow 172: struct mowner udp_mowner = MOWNER_INIT("udp", "");
173: struct mowner udp_rx_mowner = MOWNER_INIT("udp", "rx");
174: struct mowner udp_tx_mowner = MOWNER_INIT("udp", "tx");
1.98 matt 175: #endif
176:
1.78 thorpej 177: #ifdef UDP_CSUM_COUNTERS
178: #include <sys/device.h>
179:
1.140 yamt 180: #if defined(INET)
1.78 thorpej 181: struct evcnt udp_hwcsum_bad = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
182: NULL, "udp", "hwcsum bad");
183: struct evcnt udp_hwcsum_ok = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
184: NULL, "udp", "hwcsum ok");
185: struct evcnt udp_hwcsum_data = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
186: NULL, "udp", "hwcsum data");
187: struct evcnt udp_swcsum = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
188: NULL, "udp", "swcsum");
189:
1.120 matt 190: EVCNT_ATTACH_STATIC(udp_hwcsum_bad);
191: EVCNT_ATTACH_STATIC(udp_hwcsum_ok);
192: EVCNT_ATTACH_STATIC(udp_hwcsum_data);
193: EVCNT_ATTACH_STATIC(udp_swcsum);
1.140 yamt 194: #endif /* defined(INET) */
195:
196: #define UDP_CSUM_COUNTER_INCR(ev) (ev)->ev_count++
1.78 thorpej 197: #else
198: #define UDP_CSUM_COUNTER_INCR(ev) /* nothing */
199: #endif /* UDP_CSUM_COUNTERS */
200:
1.179 pooka 201: static void sysctl_net_inet_udp_setup(struct sysctllog **);
202:
1.192 pooka 203: static int
204: do_udpinit(void)
1.1 cgd 205: {
1.18 mycroft 206:
1.35 mycroft 207: in_pcbinit(&udbtable, udbhashsize, udbhashsize);
1.193 pooka 208: udpstat_percpu = percpu_alloc(sizeof(uint64_t) * UDP_NSTATS);
1.78 thorpej 209:
1.98 matt 210: MOWNER_ATTACH(&udp_tx_mowner);
211: MOWNER_ATTACH(&udp_rx_mowner);
212: MOWNER_ATTACH(&udp_mowner);
1.166 thorpej 213:
1.192 pooka 214: return 0;
215: }
216:
217: void
218: udp_init_common(void)
219: {
220: static ONCE_DECL(doudpinit);
221:
222: RUN_ONCE(&doudpinit, do_udpinit);
223: }
224:
225: void
226: udp_init(void)
227: {
228:
229: sysctl_net_inet_udp_setup(NULL);
230:
231: udp_init_common();
1.1 cgd 232: }
233:
1.129 yamt 234: /*
235: * Checksum extended UDP header and data.
236: */
237:
238: int
239: udp_input_checksum(int af, struct mbuf *m, const struct udphdr *uh,
240: int iphlen, int len)
241: {
242:
243: switch (af) {
1.72 itojun 244: #ifdef INET
1.129 yamt 245: case AF_INET:
246: return udp4_input_checksum(m, uh, iphlen, len);
247: #endif
248: #ifdef INET6
249: case AF_INET6:
250: return udp6_input_checksum(m, uh, iphlen, len);
251: #endif
252: }
253: #ifdef DIAGNOSTIC
254: panic("udp_input_checksum: unknown af %d", af);
255: #endif
256: /* NOTREACHED */
257: return -1;
258: }
259:
260: #ifdef INET
261:
262: /*
263: * Checksum extended UDP header and data.
264: */
265:
266: static int
267: udp4_input_checksum(struct mbuf *m, const struct udphdr *uh,
268: int iphlen, int len)
269: {
270:
271: /*
272: * XXX it's better to record and check if this mbuf is
273: * already checked.
274: */
275:
276: if (uh->uh_sum == 0)
277: return 0;
278:
279: switch (m->m_pkthdr.csum_flags &
280: ((m->m_pkthdr.rcvif->if_csum_flags_rx & M_CSUM_UDPv4) |
281: M_CSUM_TCP_UDP_BAD | M_CSUM_DATA)) {
282: case M_CSUM_UDPv4|M_CSUM_TCP_UDP_BAD:
283: UDP_CSUM_COUNTER_INCR(&udp_hwcsum_bad);
284: goto badcsum;
285:
286: case M_CSUM_UDPv4|M_CSUM_DATA: {
287: u_int32_t hw_csum = m->m_pkthdr.csum_data;
288:
289: UDP_CSUM_COUNTER_INCR(&udp_hwcsum_data);
290: if (m->m_pkthdr.csum_flags & M_CSUM_NO_PSEUDOHDR) {
291: const struct ip *ip =
292: mtod(m, const struct ip *);
293:
294: hw_csum = in_cksum_phdr(ip->ip_src.s_addr,
295: ip->ip_dst.s_addr,
296: htons(hw_csum + len + IPPROTO_UDP));
297: }
298: if ((hw_csum ^ 0xffff) != 0)
299: goto badcsum;
300: break;
301: }
302:
303: case M_CSUM_UDPv4:
304: /* Checksum was okay. */
305: UDP_CSUM_COUNTER_INCR(&udp_hwcsum_ok);
306: break;
307:
308: default:
309: /*
310: * Need to compute it ourselves. Maybe skip checksum
311: * on loopback interfaces.
312: */
313: if (__predict_true(!(m->m_pkthdr.rcvif->if_flags &
314: IFF_LOOPBACK) ||
315: udp_do_loopback_cksum)) {
316: UDP_CSUM_COUNTER_INCR(&udp_swcsum);
317: if (in4_cksum(m, IPPROTO_UDP, iphlen, len) != 0)
318: goto badcsum;
319: }
320: break;
321: }
322:
323: return 0;
324:
325: badcsum:
1.166 thorpej 326: UDP_STATINC(UDP_STAT_BADSUM);
1.129 yamt 327: return -1;
328: }
329:
1.7 mycroft 330: void
1.27 christos 331: udp_input(struct mbuf *m, ...)
1.1 cgd 332: {
1.53 itojun 333: va_list ap;
334: struct sockaddr_in src, dst;
335: struct ip *ip;
336: struct udphdr *uh;
1.97 simonb 337: int iphlen;
1.53 itojun 338: int len;
339: int n;
1.96 itojun 340: u_int16_t ip_len;
1.53 itojun 341:
342: va_start(ap, m);
343: iphlen = va_arg(ap, int);
1.97 simonb 344: (void)va_arg(ap, int); /* ignore value, advance ap */
1.53 itojun 345: va_end(ap);
346:
1.98 matt 347: MCLAIM(m, &udp_rx_mowner);
1.166 thorpej 348: UDP_STATINC(UDP_STAT_IPACKETS);
1.53 itojun 349:
350: /*
351: * Get IP and UDP header together in first mbuf.
352: */
353: ip = mtod(m, struct ip *);
354: IP6_EXTHDR_GET(uh, struct udphdr *, m, iphlen, sizeof(struct udphdr));
355: if (uh == NULL) {
1.166 thorpej 356: UDP_STATINC(UDP_STAT_HDROPS);
1.53 itojun 357: return;
358: }
1.95 thorpej 359: KASSERT(UDP_HDR_ALIGNED_P(uh));
1.53 itojun 360:
1.57 itojun 361: /* destination port of 0 is illegal, based on RFC768. */
362: if (uh->uh_dport == 0)
363: goto bad;
364:
1.53 itojun 365: /*
366: * Make mbuf data length reflect UDP length.
367: * If not enough data to reflect UDP length, drop.
368: */
1.96 itojun 369: ip_len = ntohs(ip->ip_len);
1.53 itojun 370: len = ntohs((u_int16_t)uh->uh_ulen);
1.96 itojun 371: if (ip_len != iphlen + len) {
372: if (ip_len < iphlen + len || len < sizeof(struct udphdr)) {
1.166 thorpej 373: UDP_STATINC(UDP_STAT_BADLEN);
1.53 itojun 374: goto bad;
375: }
1.96 itojun 376: m_adj(m, iphlen + len - ip_len);
1.53 itojun 377: }
378:
379: /*
380: * Checksum extended UDP header and data.
381: */
1.129 yamt 382: if (udp4_input_checksum(m, uh, iphlen, len))
383: goto badcsum;
1.53 itojun 384:
385: /* construct source and dst sockaddrs. */
1.159 dyoung 386: sockaddr_in_init(&src, &ip->ip_src, uh->uh_sport);
387: sockaddr_in_init(&dst, &ip->ip_dst, uh->uh_dport);
1.53 itojun 388:
1.144 manu 389: if ((n = udp4_realinput(&src, &dst, &m, iphlen)) == -1) {
1.166 thorpej 390: UDP_STATINC(UDP_STAT_HDROPS);
1.144 manu 391: return;
392: }
1.188 christos 393: if (m == NULL) {
394: /*
395: * packet has been processed by ESP stuff -
396: * e.g. dropped NAT-T-keep-alive-packet ...
397: */
398: return;
399: }
400: ip = mtod(m, struct ip *);
1.53 itojun 401: #ifdef INET6
402: if (IN_MULTICAST(ip->ip_dst.s_addr) || n == 0) {
403: struct sockaddr_in6 src6, dst6;
404:
1.175 cegger 405: memset(&src6, 0, sizeof(src6));
1.53 itojun 406: src6.sin6_family = AF_INET6;
407: src6.sin6_len = sizeof(struct sockaddr_in6);
408: src6.sin6_addr.s6_addr[10] = src6.sin6_addr.s6_addr[11] = 0xff;
1.177 tsutsui 409: memcpy(&src6.sin6_addr.s6_addr[12], &ip->ip_src,
1.53 itojun 410: sizeof(ip->ip_src));
411: src6.sin6_port = uh->uh_sport;
1.175 cegger 412: memset(&dst6, 0, sizeof(dst6));
1.53 itojun 413: dst6.sin6_family = AF_INET6;
414: dst6.sin6_len = sizeof(struct sockaddr_in6);
415: dst6.sin6_addr.s6_addr[10] = dst6.sin6_addr.s6_addr[11] = 0xff;
1.177 tsutsui 416: memcpy(&dst6.sin6_addr.s6_addr[12], &ip->ip_dst,
1.53 itojun 417: sizeof(ip->ip_dst));
418: dst6.sin6_port = uh->uh_dport;
419:
420: n += udp6_realinput(AF_INET, &src6, &dst6, m, iphlen);
421: }
422: #endif
423:
424: if (n == 0) {
425: if (m->m_flags & (M_BCAST | M_MCAST)) {
1.166 thorpej 426: UDP_STATINC(UDP_STAT_NOPORTBCAST);
1.53 itojun 427: goto bad;
428: }
1.166 thorpej 429: UDP_STATINC(UDP_STAT_NOPORT);
1.64 ws 430: #ifdef IPKDB
1.53 itojun 431: if (checkipkdb(&ip->ip_src, uh->uh_sport, uh->uh_dport,
432: m, iphlen + sizeof(struct udphdr),
433: m->m_pkthdr.len - iphlen - sizeof(struct udphdr))) {
434: /*
435: * It was a debugger connect packet,
436: * just drop it now
437: */
438: goto bad;
439: }
440: #endif
441: icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0);
442: m = NULL;
443: }
444:
445: bad:
446: if (m)
447: m_freem(m);
1.78 thorpej 448: return;
449:
450: badcsum:
451: m_freem(m);
1.53 itojun 452: }
1.72 itojun 453: #endif
1.53 itojun 454:
1.72 itojun 455: #ifdef INET
1.53 itojun 456: static void
1.119 matt 457: udp4_sendup(struct mbuf *m, int off /* offset of data portion */,
458: struct sockaddr *src, struct socket *so)
1.53 itojun 459: {
460: struct mbuf *opts = NULL;
461: struct mbuf *n;
462: struct inpcb *inp = NULL;
463:
464: if (!so)
465: return;
466: switch (so->so_proto->pr_domain->dom_family) {
467: case AF_INET:
468: inp = sotoinpcb(so);
469: break;
470: #ifdef INET6
471: case AF_INET6:
472: break;
473: #endif
474: default:
475: return;
476: }
477:
1.190 christos 478: #if defined(IPSEC)
1.53 itojun 479: /* check AH/ESP integrity. */
1.199 christos 480: if (ipsec_used && so != NULL && ipsec4_in_reject_so(m, so)) {
1.169 thorpej 481: IPSEC_STATINC(IPSEC_STAT_IN_POLVIO);
1.162 dyoung 482: if ((n = m_copypacket(m, M_DONTWAIT)) != NULL)
1.110 itojun 483: icmp_error(n, ICMP_UNREACH, ICMP_UNREACH_ADMIN_PROHIBIT,
484: 0, 0);
1.53 itojun 485: return;
486: }
487: #endif /*IPSEC*/
488:
1.162 dyoung 489: if ((n = m_copypacket(m, M_DONTWAIT)) != NULL) {
1.53 itojun 490: if (inp && (inp->inp_flags & INP_CONTROLOPTS
1.174 christos 491: #ifdef SO_OTIMESTAMP
492: || so->so_options & SO_OTIMESTAMP
493: #endif
1.53 itojun 494: || so->so_options & SO_TIMESTAMP)) {
495: struct ip *ip = mtod(n, struct ip *);
496: ip_savecontrol(inp, &opts, ip, n);
497: }
498:
499: m_adj(n, off);
500: if (sbappendaddr(&so->so_rcv, src, n,
501: opts) == 0) {
502: m_freem(n);
503: if (opts)
504: m_freem(opts);
1.124 darrenr 505: so->so_rcv.sb_overflowed++;
1.166 thorpej 506: UDP_STATINC(UDP_STAT_FULLSOCK);
1.53 itojun 507: } else
508: sorwakeup(so);
509: }
510: }
1.72 itojun 511: #endif
1.53 itojun 512:
1.72 itojun 513: #ifdef INET
1.53 itojun 514: static int
1.119 matt 515: udp4_realinput(struct sockaddr_in *src, struct sockaddr_in *dst,
1.144 manu 516: struct mbuf **mp, int off /* offset of udphdr */)
1.53 itojun 517: {
518: u_int16_t *sport, *dport;
519: int rcvcnt;
520: struct in_addr *src4, *dst4;
1.109 itojun 521: struct inpcb_hdr *inph;
1.53 itojun 522: struct inpcb *inp;
1.144 manu 523: struct mbuf *m = *mp;
1.53 itojun 524:
525: rcvcnt = 0;
526: off += sizeof(struct udphdr); /* now, offset of payload */
527:
528: if (src->sin_family != AF_INET || dst->sin_family != AF_INET)
529: goto bad;
530:
531: src4 = &src->sin_addr;
532: sport = &src->sin_port;
533: dst4 = &dst->sin_addr;
534: dport = &dst->sin_port;
535:
1.73 itojun 536: if (IN_MULTICAST(dst4->s_addr) ||
1.53 itojun 537: in_broadcast(*dst4, m->m_pkthdr.rcvif)) {
538: /*
539: * Deliver a multicast or broadcast datagram to *all* sockets
540: * for which the local and remote addresses and ports match
541: * those of the incoming datagram. This allows more than
542: * one process to receive multi/broadcasts on the same port.
543: * (This really ought to be done for unicast datagrams as
544: * well, but that would cause problems with existing
545: * applications that open both address-specific sockets and
546: * a wildcard socket listening to the same port -- they would
547: * end up receiving duplicates of every unicast datagram.
548: * Those applications open the multiple sockets to overcome an
549: * inadequacy of the UDP socket interface, but for backwards
550: * compatibility we avoid the problem here rather than
551: * fixing the interface. Maybe 4.5BSD will remedy this?)
552: */
553:
554: /*
1.92 itojun 555: * KAME note: traditionally we dropped udpiphdr from mbuf here.
1.71 itojun 556: * we need udpiphdr for IPsec processing so we do that later.
1.53 itojun 557: */
558: /*
559: * Locate pcb(s) for datagram.
560: */
1.191 christos 561: TAILQ_FOREACH(inph, &udbtable.inpt_queue, inph_queue) {
1.109 itojun 562: inp = (struct inpcb *)inph;
563: if (inp->inp_af != AF_INET)
564: continue;
565:
1.53 itojun 566: if (inp->inp_lport != *dport)
567: continue;
568: if (!in_nullhost(inp->inp_laddr)) {
569: if (!in_hosteq(inp->inp_laddr, *dst4))
570: continue;
571: }
572: if (!in_nullhost(inp->inp_faddr)) {
573: if (!in_hosteq(inp->inp_faddr, *src4) ||
574: inp->inp_fport != *sport)
575: continue;
576: }
577:
578: udp4_sendup(m, off, (struct sockaddr *)src,
579: inp->inp_socket);
580: rcvcnt++;
581:
582: /*
583: * Don't look for additional matches if this one does
584: * not have either the SO_REUSEPORT or SO_REUSEADDR
585: * socket options set. This heuristic avoids searching
586: * through all pcbs in the common case of a non-shared
587: * port. It assumes that an application will never
588: * clear these options after setting them.
589: */
590: if ((inp->inp_socket->so_options &
591: (SO_REUSEPORT|SO_REUSEADDR)) == 0)
592: break;
593: }
594: } else {
595: /*
596: * Locate pcb for datagram.
597: */
1.180 dyoung 598: inp = in_pcblookup_connect(&udbtable, *src4, *sport, *dst4,
599: *dport, 0);
1.53 itojun 600: if (inp == 0) {
1.166 thorpej 601: UDP_STATINC(UDP_STAT_PCBHASHMISS);
1.53 itojun 602: inp = in_pcblookup_bind(&udbtable, *dst4, *dport);
1.82 itojun 603: if (inp == 0)
1.53 itojun 604: return rcvcnt;
605: }
606:
1.190 christos 607: #ifdef IPSEC
1.130 manu 608: /* Handle ESP over UDP */
609: if (inp->inp_flags & INP_ESPINUDP_ALL) {
610: struct sockaddr *sa = (struct sockaddr *)src;
611:
1.144 manu 612: switch(udp4_espinudp(mp, off, sa, inp->inp_socket)) {
613: case -1: /* Error, m was freeed */
614: rcvcnt = -1;
615: goto bad;
616: break;
617:
618: case 1: /* ESP over UDP */
1.130 manu 619: rcvcnt++;
620: goto bad;
1.144 manu 621: break;
622:
623: case 0: /* plain UDP */
624: default: /* Unexpected */
625: /*
626: * Normal UDP processing will take place
627: * m may have changed.
628: */
629: m = *mp;
630: break;
1.130 manu 631: }
632: }
1.189 christos 633: #endif
1.130 manu 634:
1.178 minskim 635: /*
636: * Check the minimum TTL for socket.
637: */
638: if (mtod(m, struct ip *)->ip_ttl < inp->inp_ip_minttl)
639: goto bad;
640:
1.53 itojun 641: udp4_sendup(m, off, (struct sockaddr *)src, inp->inp_socket);
642: rcvcnt++;
643: }
644:
645: bad:
646: return rcvcnt;
647: }
1.72 itojun 648: #endif
1.53 itojun 649:
1.72 itojun 650: #ifdef INET
1.1 cgd 651: /*
652: * Notify a udp user of an asynchronous error;
653: * just wake up so that he can collect error status.
654: */
1.7 mycroft 655: static void
1.119 matt 656: udp_notify(struct inpcb *inp, int errno)
1.1 cgd 657: {
658: inp->inp_socket->so_error = errno;
659: sorwakeup(inp->inp_socket);
660: sowwakeup(inp->inp_socket);
661: }
662:
1.27 christos 663: void *
1.157 dyoung 664: udp_ctlinput(int cmd, const struct sockaddr *sa, void *v)
1.1 cgd 665: {
1.66 augustss 666: struct ip *ip = v;
667: struct udphdr *uh;
1.119 matt 668: void (*notify)(struct inpcb *, int) = udp_notify;
1.21 mycroft 669: int errno;
1.1 cgd 670:
1.53 itojun 671: if (sa->sa_family != AF_INET
672: || sa->sa_len != sizeof(struct sockaddr_in))
1.51 itojun 673: return NULL;
1.20 mycroft 674: if ((unsigned)cmd >= PRC_NCMDS)
1.27 christos 675: return NULL;
1.20 mycroft 676: errno = inetctlerrmap[cmd];
1.18 mycroft 677: if (PRC_IS_REDIRECT(cmd))
1.19 mycroft 678: notify = in_rtchange, ip = 0;
1.18 mycroft 679: else if (cmd == PRC_HOSTDEAD)
1.19 mycroft 680: ip = 0;
1.23 cgd 681: else if (errno == 0)
1.27 christos 682: return NULL;
1.19 mycroft 683: if (ip) {
1.158 christos 684: uh = (struct udphdr *)((char *)ip + (ip->ip_hl << 2));
1.157 dyoung 685: in_pcbnotify(&udbtable, satocsin(sa)->sin_addr, uh->uh_dport,
1.34 mycroft 686: ip->ip_src, uh->uh_sport, errno, notify);
1.53 itojun 687:
688: /* XXX mapped address case */
1.19 mycroft 689: } else
1.157 dyoung 690: in_pcbnotifyall(&udbtable, satocsin(sa)->sin_addr, errno,
1.34 mycroft 691: notify);
1.27 christos 692: return NULL;
1.1 cgd 693: }
694:
1.7 mycroft 695: int
1.173 plunky 696: udp_ctloutput(int op, struct socket *so, struct sockopt *sopt)
1.130 manu 697: {
698: int s;
699: int error = 0;
700: struct inpcb *inp;
701: int family;
1.173 plunky 702: int optval;
1.130 manu 703:
704: family = so->so_proto->pr_domain->dom_family;
705:
706: s = splsoftnet();
707: switch (family) {
708: #ifdef INET
709: case PF_INET:
1.173 plunky 710: if (sopt->sopt_level != IPPROTO_UDP) {
711: error = ip_ctloutput(op, so, sopt);
1.130 manu 712: goto end;
713: }
714: break;
715: #endif
716: #ifdef INET6
717: case PF_INET6:
1.173 plunky 718: if (sopt->sopt_level != IPPROTO_UDP) {
719: error = ip6_ctloutput(op, so, sopt);
1.130 manu 720: goto end;
721: }
722: break;
723: #endif
724: default:
725: error = EAFNOSUPPORT;
726: goto end;
727: }
728:
729:
730: switch (op) {
731: case PRCO_SETOPT:
732: inp = sotoinpcb(so);
733:
1.173 plunky 734: switch (sopt->sopt_name) {
1.130 manu 735: case UDP_ENCAP:
1.173 plunky 736: error = sockopt_getint(sopt, &optval);
737: if (error)
1.153 yamt 738: break;
1.131 perry 739:
1.173 plunky 740: switch(optval) {
1.130 manu 741: case 0:
742: inp->inp_flags &= ~INP_ESPINUDP_ALL;
743: break;
744:
745: case UDP_ENCAP_ESPINUDP:
746: inp->inp_flags &= ~INP_ESPINUDP_ALL;
747: inp->inp_flags |= INP_ESPINUDP;
748: break;
1.131 perry 749:
1.130 manu 750: case UDP_ENCAP_ESPINUDP_NON_IKE:
751: inp->inp_flags &= ~INP_ESPINUDP_ALL;
752: inp->inp_flags |= INP_ESPINUDP_NON_IKE;
753: break;
754: default:
755: error = EINVAL;
756: break;
757: }
758: break;
1.183 christos 759:
1.130 manu 760: default:
761: error = ENOPROTOOPT;
762: break;
763: }
764: break;
765:
766: default:
767: error = EINVAL;
768: break;
1.131 perry 769: }
770:
1.130 manu 771: end:
772: splx(s);
773: return error;
774: }
1.131 perry 775:
1.130 manu 776:
777: int
1.27 christos 778: udp_output(struct mbuf *m, ...)
779: {
1.66 augustss 780: struct inpcb *inp;
781: struct udpiphdr *ui;
1.125 thorpej 782: struct route *ro;
1.66 augustss 783: int len = m->m_pkthdr.len;
1.31 mycroft 784: int error = 0;
1.27 christos 785: va_list ap;
786:
1.98 matt 787: MCLAIM(m, &udp_tx_mowner);
1.27 christos 788: va_start(ap, m);
789: inp = va_arg(ap, struct inpcb *);
790: va_end(ap);
1.1 cgd 791:
792: /*
793: * Calculate data length and get a mbuf
794: * for UDP and IP headers.
795: */
1.13 mycroft 796: M_PREPEND(m, sizeof(struct udpiphdr), M_DONTWAIT);
797: if (m == 0) {
798: error = ENOBUFS;
1.39 thorpej 799: goto release;
800: }
801:
802: /*
803: * Compute the packet length of the IP header, and
804: * punt if the length looks bogus.
805: */
1.96 itojun 806: if (len + sizeof(struct udpiphdr) > IP_MAXPACKET) {
1.39 thorpej 807: error = EMSGSIZE;
1.13 mycroft 808: goto release;
809: }
1.1 cgd 810:
811: /*
812: * Fill in mbuf with extended UDP header
813: * and addresses and length put into network format.
814: */
815: ui = mtod(m, struct udpiphdr *);
816: ui->ui_pr = IPPROTO_UDP;
817: ui->ui_src = inp->inp_laddr;
818: ui->ui_dst = inp->inp_faddr;
819: ui->ui_sport = inp->inp_lport;
820: ui->ui_dport = inp->inp_fport;
1.78 thorpej 821: ui->ui_ulen = htons((u_int16_t)len + sizeof(struct udphdr));
1.1 cgd 822:
1.125 thorpej 823: ro = &inp->inp_route;
824:
1.1 cgd 825: /*
1.78 thorpej 826: * Set up checksum and output datagram.
1.1 cgd 827: */
828: if (udpcksum) {
1.78 thorpej 829: /*
830: * XXX Cache pseudo-header checksum part for
831: * XXX "connected" UDP sockets.
832: */
833: ui->ui_sum = in_cksum_phdr(ui->ui_src.s_addr,
834: ui->ui_dst.s_addr, htons((u_int16_t)len +
835: sizeof(struct udphdr) + IPPROTO_UDP));
1.135 yamt 836: m->m_pkthdr.csum_flags = M_CSUM_UDPv4;
1.78 thorpej 837: m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum);
838: } else
839: ui->ui_sum = 0;
1.96 itojun 840: ((struct ip *)ui)->ip_len = htons(sizeof (struct udpiphdr) + len);
1.1 cgd 841: ((struct ip *)ui)->ip_ttl = inp->inp_ip.ip_ttl; /* XXX */
842: ((struct ip *)ui)->ip_tos = inp->inp_ip.ip_tos; /* XXX */
1.166 thorpej 843: UDP_STATINC(UDP_STAT_OPACKETS);
1.48 itojun 844:
1.125 thorpej 845: return (ip_output(m, inp->inp_options, ro,
1.12 mycroft 846: inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST),
1.107 itojun 847: inp->inp_moptions, inp->inp_socket));
1.1 cgd 848:
849: release:
850: m_freem(m);
851: return (error);
852: }
853:
1.196 rmind 854: static int
855: udp_attach(struct socket *so, int proto)
856: {
857: struct inpcb *inp;
858: int error;
859:
860: KASSERT(sotoinpcb(so) == NULL);
861:
862: /* Assign the lock (must happen even if we will error out). */
863: sosetlock(so);
864:
865: #ifdef MBUFTRACE
866: so->so_mowner = &udp_mowner;
867: so->so_rcv.sb_mowner = &udp_rx_mowner;
868: so->so_snd.sb_mowner = &udp_tx_mowner;
869: #endif
870: if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
871: error = soreserve(so, udp_sendspace, udp_recvspace);
872: if (error) {
873: return error;
874: }
875: }
876:
877: error = in_pcballoc(so, &udbtable);
878: if (error) {
879: return error;
880: }
881: inp = sotoinpcb(so);
882: inp->inp_ip.ip_ttl = ip_defttl;
883: KASSERT(solocked(so));
884:
885: return error;
886: }
887:
888: static void
889: udp_detach(struct socket *so)
890: {
891: struct inpcb *inp;
892:
893: KASSERT(solocked(so));
894: inp = sotoinpcb(so);
895: KASSERT(inp != NULL);
896: in_pcbdetach(inp);
897: }
1.1 cgd 898:
1.195 rmind 899: static int
1.219 rtr 900: udp_accept(struct socket *so, struct sockaddr *nam)
1.208 rtr 901: {
902: KASSERT(solocked(so));
903:
904: panic("udp_accept");
1.210 rtr 905:
1.208 rtr 906: return EOPNOTSUPP;
907: }
908:
909: static int
1.218 rtr 910: udp_bind(struct socket *so, struct sockaddr *nam, struct lwp *l)
1.210 rtr 911: {
912: struct inpcb *inp = sotoinpcb(so);
1.218 rtr 913: struct sockaddr_in *sin = (struct sockaddr_in *)nam;
1.210 rtr 914: int error = 0;
915: int s;
916:
917: KASSERT(solocked(so));
918: KASSERT(inp != NULL);
919: KASSERT(nam != NULL);
920:
921: s = splsoftnet();
1.218 rtr 922: error = in_pcbbind(inp, sin, l);
1.210 rtr 923: splx(s);
924:
925: return error;
926: }
927:
928: static int
1.214 rtr 929: udp_listen(struct socket *so, struct lwp *l)
1.210 rtr 930: {
931: KASSERT(solocked(so));
932:
933: return EOPNOTSUPP;
934: }
935:
1.211 rtr 936: static int
1.221 rtr 937: udp_connect(struct socket *so, struct sockaddr *nam, struct lwp *l)
1.211 rtr 938: {
939: struct inpcb *inp = sotoinpcb(so);
940: int error = 0;
941: int s;
942:
943: KASSERT(solocked(so));
944: KASSERT(inp != NULL);
945: KASSERT(nam != NULL);
946:
947: s = splsoftnet();
1.221 rtr 948: error = in_pcbconnect(inp, (struct sockaddr_in *)nam, l);
1.211 rtr 949: if (! error)
950: soisconnected(so);
951: splx(s);
952: return error;
953: }
1.210 rtr 954:
955: static int
1.217 rtr 956: udp_connect2(struct socket *so, struct socket *so2)
957: {
958: KASSERT(solocked(so));
959:
960: return EOPNOTSUPP;
961: }
962:
963: static int
1.212 rtr 964: udp_disconnect(struct socket *so)
965: {
966: struct inpcb *inp = sotoinpcb(so);
967: int s;
968:
969: KASSERT(solocked(so));
970: KASSERT(inp != NULL);
971:
972: s = splsoftnet();
973: /*soisdisconnected(so);*/
974: so->so_state &= ~SS_ISCONNECTED; /* XXX */
975: in_pcbdisconnect(inp);
976: inp->inp_laddr = zeroin_addr; /* XXX */
977: in_pcbstate(inp, INP_BOUND); /* XXX */
978: splx(s);
979:
980: return 0;
981: }
982:
983: static int
984: udp_shutdown(struct socket *so)
985: {
986: int s;
987:
988: KASSERT(solocked(so));
989:
990: s = splsoftnet();
991: socantsendmore(so);
992: splx(s);
993:
994: return 0;
995: }
996:
997: static int
998: udp_abort(struct socket *so)
999: {
1000: KASSERT(solocked(so));
1001:
1002: panic("udp_abort");
1003:
1004: return EOPNOTSUPP;
1005: }
1006:
1007: static int
1.202 rtr 1008: udp_ioctl(struct socket *so, u_long cmd, void *nam, struct ifnet *ifp)
1.200 rtr 1009: {
1.202 rtr 1010: return in_control(so, cmd, nam, ifp);
1.200 rtr 1011: }
1012:
1013: static int
1.203 rtr 1014: udp_stat(struct socket *so, struct stat *ub)
1015: {
1.206 rtr 1016: KASSERT(solocked(so));
1017:
1.205 rtr 1018: /* stat: don't bother with a blocksize. */
1019: return 0;
1.203 rtr 1020: }
1021:
1022: static int
1.219 rtr 1023: udp_peeraddr(struct socket *so, struct sockaddr *nam)
1.207 rtr 1024: {
1.213 rtr 1025: int s;
1026:
1.207 rtr 1027: KASSERT(solocked(so));
1028: KASSERT(sotoinpcb(so) != NULL);
1029: KASSERT(nam != NULL);
1030:
1.213 rtr 1031: s = splsoftnet();
1.219 rtr 1032: in_setpeeraddr(sotoinpcb(so), (struct sockaddr_in *)nam);
1.213 rtr 1033: splx(s);
1034:
1.207 rtr 1035: return 0;
1036: }
1037:
1038: static int
1.219 rtr 1039: udp_sockaddr(struct socket *so, struct sockaddr *nam)
1.207 rtr 1040: {
1.213 rtr 1041: int s;
1042:
1.207 rtr 1043: KASSERT(solocked(so));
1044: KASSERT(sotoinpcb(so) != NULL);
1045: KASSERT(nam != NULL);
1046:
1.213 rtr 1047: s = splsoftnet();
1.219 rtr 1048: in_setsockaddr(sotoinpcb(so), (struct sockaddr_in *)nam);
1.213 rtr 1049: splx(s);
1050:
1.207 rtr 1051: return 0;
1052: }
1053:
1054: static int
1.216 rtr 1055: udp_rcvd(struct socket *so, int flags, struct lwp *l)
1056: {
1057: KASSERT(solocked(so));
1058:
1059: return EOPNOTSUPP;
1060: }
1061:
1062: static int
1.209 rtr 1063: udp_recvoob(struct socket *so, struct mbuf *m, int flags)
1064: {
1065: KASSERT(solocked(so));
1066:
1067: return EOPNOTSUPP;
1068: }
1069:
1070: static int
1.221 rtr 1071: udp_send(struct socket *so, struct mbuf *m, struct sockaddr *nam,
1.215 rtr 1072: struct mbuf *control, struct lwp *l)
1073: {
1074: struct inpcb *inp = sotoinpcb(so);
1075: int error = 0;
1076: struct in_addr laddr; /* XXX */
1077: int s;
1078:
1079: KASSERT(solocked(so));
1080: KASSERT(inp != NULL);
1081: KASSERT(m != NULL);
1082:
1083: if (control && control->m_len) {
1084: m_freem(control);
1085: m_freem(m);
1086: return EINVAL;
1087: }
1088:
1089: memset(&laddr, 0, sizeof laddr);
1090:
1091: s = splsoftnet();
1092: if (nam) {
1093: laddr = inp->inp_laddr; /* XXX */
1094: if ((so->so_state & SS_ISCONNECTED) != 0) {
1095: error = EISCONN;
1096: goto die;
1097: }
1.221 rtr 1098: error = in_pcbconnect(inp, (struct sockaddr_in *)nam, l);
1.215 rtr 1099: if (error)
1100: goto die;
1101: } else {
1102: if ((so->so_state & SS_ISCONNECTED) == 0) {
1103: error = ENOTCONN;
1104: goto die;
1105: }
1106: }
1107: error = udp_output(m, inp);
1108: m = NULL;
1109: if (nam) {
1110: in_pcbdisconnect(inp);
1111: inp->inp_laddr = laddr; /* XXX */
1112: in_pcbstate(inp, INP_BOUND); /* XXX */
1113: }
1114: die:
1115: if (m)
1116: m_freem(m);
1117:
1118: splx(s);
1119: return error;
1120: }
1121:
1122: static int
1.209 rtr 1123: udp_sendoob(struct socket *so, struct mbuf *m, struct mbuf *control)
1124: {
1125: KASSERT(solocked(so));
1126:
1127: m_freem(m);
1128: m_freem(control);
1129:
1130: return EOPNOTSUPP;
1131: }
1132:
1133: static int
1.217 rtr 1134: udp_purgeif(struct socket *so, struct ifnet *ifp)
1135: {
1136: int s;
1137:
1138: s = splsoftnet();
1139: mutex_enter(softnet_lock);
1140: in_pcbpurgeif0(&udbtable, ifp);
1141: in_purgeif(ifp);
1142: in_pcbpurgeif(&udbtable, ifp);
1143: mutex_exit(softnet_lock);
1144: splx(s);
1145:
1146: return 0;
1147: }
1148:
1149: static int
1.166 thorpej 1150: sysctl_net_inet_udp_stats(SYSCTLFN_ARGS)
1151: {
1152:
1.172 thorpej 1153: return (NETSTAT_SYSCTL(udpstat_percpu, UDP_NSTATS));
1.166 thorpej 1154: }
1155:
1.13 mycroft 1156: /*
1157: * Sysctl for udp variables.
1158: */
1.179 pooka 1159: static void
1160: sysctl_net_inet_udp_setup(struct sysctllog **clog)
1.13 mycroft 1161: {
1.194 pooka 1162:
1.116 atatat 1163: sysctl_createv(clog, 0, NULL, NULL,
1164: CTLFLAG_PERMANENT,
1.114 atatat 1165: CTLTYPE_NODE, "inet", NULL,
1166: NULL, 0, NULL, 0,
1167: CTL_NET, PF_INET, CTL_EOL);
1.116 atatat 1168: sysctl_createv(clog, 0, NULL, NULL,
1169: CTLFLAG_PERMANENT,
1.122 atatat 1170: CTLTYPE_NODE, "udp",
1171: SYSCTL_DESCR("UDPv4 related settings"),
1.114 atatat 1172: NULL, 0, NULL, 0,
1173: CTL_NET, PF_INET, IPPROTO_UDP, CTL_EOL);
1174:
1.116 atatat 1175: sysctl_createv(clog, 0, NULL, NULL,
1176: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.122 atatat 1177: CTLTYPE_INT, "checksum",
1.123 heas 1178: SYSCTL_DESCR("Compute UDP checksums"),
1.114 atatat 1179: NULL, 0, &udpcksum, 0,
1180: CTL_NET, PF_INET, IPPROTO_UDP, UDPCTL_CHECKSUM,
1181: CTL_EOL);
1.116 atatat 1182: sysctl_createv(clog, 0, NULL, NULL,
1183: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.122 atatat 1184: CTLTYPE_INT, "sendspace",
1185: SYSCTL_DESCR("Default UDP send buffer size"),
1.114 atatat 1186: NULL, 0, &udp_sendspace, 0,
1187: CTL_NET, PF_INET, IPPROTO_UDP, UDPCTL_SENDSPACE,
1188: CTL_EOL);
1.116 atatat 1189: sysctl_createv(clog, 0, NULL, NULL,
1190: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.122 atatat 1191: CTLTYPE_INT, "recvspace",
1192: SYSCTL_DESCR("Default UDP receive buffer size"),
1.114 atatat 1193: NULL, 0, &udp_recvspace, 0,
1194: CTL_NET, PF_INET, IPPROTO_UDP, UDPCTL_RECVSPACE,
1195: CTL_EOL);
1.125 thorpej 1196: sysctl_createv(clog, 0, NULL, NULL,
1197: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1198: CTLTYPE_INT, "do_loopback_cksum",
1199: SYSCTL_DESCR("Perform UDP checksum on loopback"),
1200: NULL, 0, &udp_do_loopback_cksum, 0,
1201: CTL_NET, PF_INET, IPPROTO_UDP, UDPCTL_LOOPBACKCKSUM,
1202: CTL_EOL);
1.132 atatat 1203: sysctl_createv(clog, 0, NULL, NULL,
1204: CTLFLAG_PERMANENT,
1.134 atatat 1205: CTLTYPE_STRUCT, "pcblist",
1.132 atatat 1206: SYSCTL_DESCR("UDP protocol control block list"),
1207: sysctl_inpcblist, 0, &udbtable, 0,
1208: CTL_NET, PF_INET, IPPROTO_UDP, CTL_CREATE,
1209: CTL_EOL);
1.139 elad 1210: sysctl_createv(clog, 0, NULL, NULL,
1211: CTLFLAG_PERMANENT,
1212: CTLTYPE_STRUCT, "stats",
1213: SYSCTL_DESCR("UDP statistics"),
1.166 thorpej 1214: sysctl_net_inet_udp_stats, 0, NULL, 0,
1.139 elad 1215: CTL_NET, PF_INET, IPPROTO_UDP, UDPCTL_STATS,
1216: CTL_EOL);
1.1 cgd 1217: }
1.72 itojun 1218: #endif
1.130 manu 1219:
1.166 thorpej 1220: void
1221: udp_statinc(u_int stat)
1222: {
1223:
1224: KASSERT(stat < UDP_NSTATS);
1225: UDP_STATINC(stat);
1226: }
1227:
1.190 christos 1228: #if defined(INET) && defined(IPSEC)
1.130 manu 1229: /*
1230: * Returns:
1231: * 1 if the packet was processed
1232: * 0 if normal UDP processing should take place
1.144 manu 1233: * -1 if an error occurent and m was freed
1.130 manu 1234: */
1235: static int
1.154 yamt 1236: udp4_espinudp(struct mbuf **mp, int off, struct sockaddr *src,
1.151 christos 1237: struct socket *so)
1.130 manu 1238: {
1239: size_t len;
1.158 christos 1240: void *data;
1.130 manu 1241: struct inpcb *inp;
1242: size_t skip = 0;
1243: size_t minlen;
1244: size_t iphdrlen;
1245: struct ip *ip;
1.136 manu 1246: struct m_tag *tag;
1247: struct udphdr *udphdr;
1248: u_int16_t sport, dport;
1.144 manu 1249: struct mbuf *m = *mp;
1.130 manu 1250:
1.131 perry 1251: /*
1.130 manu 1252: * Collapse the mbuf chain if the first mbuf is too short
1253: * The longest case is: UDP + non ESP marker + ESP
1254: */
1255: minlen = off + sizeof(u_int64_t) + sizeof(struct esp);
1256: if (minlen > m->m_pkthdr.len)
1257: minlen = m->m_pkthdr.len;
1258:
1259: if (m->m_len < minlen) {
1.144 manu 1260: if ((*mp = m_pullup(m, minlen)) == NULL) {
1.130 manu 1261: printf("udp4_espinudp: m_pullup failed\n");
1.144 manu 1262: return -1;
1.130 manu 1263: }
1.144 manu 1264: m = *mp;
1.130 manu 1265: }
1266:
1.131 perry 1267: len = m->m_len - off;
1.158 christos 1268: data = mtod(m, char *) + off;
1.130 manu 1269: inp = sotoinpcb(so);
1270:
1271: /* Ignore keepalive packets */
1.158 christos 1272: if ((len == 1) && (*(unsigned char *)data == 0xff)) {
1.188 christos 1273: m_free(m);
1274: *mp = NULL; /* avoid any further processiong by caller ... */
1.130 manu 1275: return 1;
1276: }
1277:
1.131 perry 1278: /*
1279: * Check that the payload is long enough to hold
1.130 manu 1280: * an ESP header and compute the length of encapsulation
1.131 perry 1281: * header to remove
1.130 manu 1282: */
1283: if (inp->inp_flags & INP_ESPINUDP) {
1284: u_int32_t *st = (u_int32_t *)data;
1285:
1286: if ((len <= sizeof(struct esp)) || (*st == 0))
1287: return 0; /* Normal UDP processing */
1288:
1289: skip = sizeof(struct udphdr);
1290: }
1291:
1292: if (inp->inp_flags & INP_ESPINUDP_NON_IKE) {
1.142 kleink 1293: u_int32_t *st = (u_int32_t *)data;
1.130 manu 1294:
1295: if ((len <= sizeof(u_int64_t) + sizeof(struct esp))
1.142 kleink 1296: || ((st[0] | st[1]) != 0))
1.130 manu 1297: return 0; /* Normal UDP processing */
1.131 perry 1298:
1.130 manu 1299: skip = sizeof(struct udphdr) + sizeof(u_int64_t);
1300: }
1301:
1302: /*
1.136 manu 1303: * Get the UDP ports. They are handled in network
1304: * order everywhere in IPSEC_NAT_T code.
1305: */
1.158 christos 1306: udphdr = (struct udphdr *)((char *)data - skip);
1.136 manu 1307: sport = udphdr->uh_sport;
1308: dport = udphdr->uh_dport;
1309:
1310: /*
1.130 manu 1311: * Remove the UDP header (and possibly the non ESP marker)
1312: * IP header lendth is iphdrlen
1.131 perry 1313: * Before:
1.130 manu 1314: * <--- off --->
1315: * +----+------+-----+
1316: * | IP | UDP | ESP |
1317: * +----+------+-----+
1318: * <-skip->
1319: * After:
1320: * +----+-----+
1321: * | IP | ESP |
1322: * +----+-----+
1323: * <-skip->
1324: */
1325: iphdrlen = off - sizeof(struct udphdr);
1.158 christos 1326: memmove(mtod(m, char *) + skip, mtod(m, void *), iphdrlen);
1.130 manu 1327: m_adj(m, skip);
1328:
1329: ip = mtod(m, struct ip *);
1330: ip->ip_len = htons(ntohs(ip->ip_len) - skip);
1331: ip->ip_p = IPPROTO_ESP;
1332:
1333: /*
1.188 christos 1334: * We have modified the packet - it is now ESP, so we should not
1335: * return to UDP processing ...
1336: *
1.136 manu 1337: * Add a PACKET_TAG_IPSEC_NAT_T_PORT tag to remember
1338: * the source UDP port. This is required if we want
1339: * to select the right SPD for multiple hosts behind
1340: * same NAT
1341: */
1.137 manu 1342: if ((tag = m_tag_get(PACKET_TAG_IPSEC_NAT_T_PORTS,
1343: sizeof(sport) + sizeof(dport), M_DONTWAIT)) == NULL) {
1344: printf("udp4_espinudp: m_tag_get failed\n");
1.188 christos 1345: m_freem(m);
1346: return -1;
1.137 manu 1347: }
1.136 manu 1348: ((u_int16_t *)(tag + 1))[0] = sport;
1349: ((u_int16_t *)(tag + 1))[1] = dport;
1.188 christos 1350: m_tag_prepend(m, tag);
1.136 manu 1351:
1.190 christos 1352: #ifdef IPSEC
1.199 christos 1353: if (ipsec_used)
1354: ipsec4_common_input(m, iphdrlen, IPPROTO_ESP);
1355: /* XXX: else */
1.147 christos 1356: #else
1.188 christos 1357: esp4_input(m, iphdrlen);
1.147 christos 1358: #endif
1.130 manu 1359:
1.185 liamjfoy 1360: /* We handled it, it shouldn't be handled by UDP */
1.188 christos 1361: *mp = NULL; /* avoid free by caller ... */
1.130 manu 1362: return 1;
1363: }
1364: #endif
1.195 rmind 1365:
1.197 rmind 1366: PR_WRAP_USRREQS(udp)
1367: #define udp_attach udp_attach_wrapper
1368: #define udp_detach udp_detach_wrapper
1.208 rtr 1369: #define udp_accept udp_accept_wrapper
1.210 rtr 1370: #define udp_bind udp_bind_wrapper
1371: #define udp_listen udp_listen_wrapper
1.211 rtr 1372: #define udp_connect udp_connect_wrapper
1.217 rtr 1373: #define udp_connect2 udp_connect2_wrapper
1.212 rtr 1374: #define udp_disconnect udp_disconnect_wrapper
1375: #define udp_shutdown udp_shutdown_wrapper
1376: #define udp_abort udp_abort_wrapper
1.200 rtr 1377: #define udp_ioctl udp_ioctl_wrapper
1.203 rtr 1378: #define udp_stat udp_stat_wrapper
1.207 rtr 1379: #define udp_peeraddr udp_peeraddr_wrapper
1380: #define udp_sockaddr udp_sockaddr_wrapper
1.216 rtr 1381: #define udp_rcvd udp_rcvd_wrapper
1.209 rtr 1382: #define udp_recvoob udp_recvoob_wrapper
1.215 rtr 1383: #define udp_send udp_send_wrapper
1.209 rtr 1384: #define udp_sendoob udp_sendoob_wrapper
1.217 rtr 1385: #define udp_purgeif udp_purgeif_wrapper
1.195 rmind 1386:
1387: const struct pr_usrreqs udp_usrreqs = {
1.196 rmind 1388: .pr_attach = udp_attach,
1389: .pr_detach = udp_detach,
1.208 rtr 1390: .pr_accept = udp_accept,
1.210 rtr 1391: .pr_bind = udp_bind,
1392: .pr_listen = udp_listen,
1.211 rtr 1393: .pr_connect = udp_connect,
1.217 rtr 1394: .pr_connect2 = udp_connect2,
1.212 rtr 1395: .pr_disconnect = udp_disconnect,
1396: .pr_shutdown = udp_shutdown,
1397: .pr_abort = udp_abort,
1.200 rtr 1398: .pr_ioctl = udp_ioctl,
1.203 rtr 1399: .pr_stat = udp_stat,
1.207 rtr 1400: .pr_peeraddr = udp_peeraddr,
1401: .pr_sockaddr = udp_sockaddr,
1.216 rtr 1402: .pr_rcvd = udp_rcvd,
1.209 rtr 1403: .pr_recvoob = udp_recvoob,
1.215 rtr 1404: .pr_send = udp_send,
1.209 rtr 1405: .pr_sendoob = udp_sendoob,
1.217 rtr 1406: .pr_purgeif = udp_purgeif,
1.195 rmind 1407: };
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