Annotation of src/sys/netinet/udp_usrreq.c, Revision 1.229
1.229 ! knakahar 1: /* $NetBSD: udp_usrreq.c,v 1.228 2016/11/15 20:50:28 mlelstv 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>
1.229 ! knakahar 69: __KERNEL_RCSID(0, "$NetBSD: udp_usrreq.c,v 1.228 2016/11/15 20:50:28 mlelstv 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"
1.229 ! knakahar 78: #include "opt_net_mpsafe.h"
1.222 pooka 79: #endif
1.1 cgd 80:
1.5 mycroft 81: #include <sys/param.h>
82: #include <sys/mbuf.h>
1.192 pooka 83: #include <sys/once.h>
1.5 mycroft 84: #include <sys/protosw.h>
85: #include <sys/socket.h>
86: #include <sys/socketvar.h>
1.27 christos 87: #include <sys/systm.h>
88: #include <sys/proc.h>
1.53 itojun 89: #include <sys/domain.h>
1.27 christos 90: #include <sys/sysctl.h>
1.1 cgd 91:
1.5 mycroft 92: #include <net/if.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 &
1.226 ozaki-r 280: ((m_get_rcvif_NOMPSAFE(m)->if_csum_flags_rx & M_CSUM_UDPv4) |
1.129 yamt 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: */
1.226 ozaki-r 313: if (__predict_true(!(m_get_rcvif_NOMPSAFE(m)->if_flags &
1.129 yamt 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: }
1.228 mlelstv 359: /*
360: * Enforce alignment requirements that are violated in
361: * some cases, see kern/50766 for details.
362: */
363: if (UDP_HDR_ALIGNED_P(uh) == 0) {
364: m = m_copyup(m, iphlen + sizeof(struct udphdr), 0);
365: if (m == NULL) {
366: UDP_STATINC(UDP_STAT_HDROPS);
367: return;
368: }
369: ip = mtod(m, struct ip *);
370: uh = (struct udphdr *)(mtod(m, char *) + iphlen);
371: }
1.95 thorpej 372: KASSERT(UDP_HDR_ALIGNED_P(uh));
1.53 itojun 373:
1.57 itojun 374: /* destination port of 0 is illegal, based on RFC768. */
375: if (uh->uh_dport == 0)
376: goto bad;
377:
1.53 itojun 378: /*
379: * Make mbuf data length reflect UDP length.
380: * If not enough data to reflect UDP length, drop.
381: */
1.96 itojun 382: ip_len = ntohs(ip->ip_len);
1.53 itojun 383: len = ntohs((u_int16_t)uh->uh_ulen);
1.96 itojun 384: if (ip_len != iphlen + len) {
385: if (ip_len < iphlen + len || len < sizeof(struct udphdr)) {
1.166 thorpej 386: UDP_STATINC(UDP_STAT_BADLEN);
1.53 itojun 387: goto bad;
388: }
1.96 itojun 389: m_adj(m, iphlen + len - ip_len);
1.53 itojun 390: }
391:
392: /*
393: * Checksum extended UDP header and data.
394: */
1.129 yamt 395: if (udp4_input_checksum(m, uh, iphlen, len))
396: goto badcsum;
1.53 itojun 397:
398: /* construct source and dst sockaddrs. */
1.159 dyoung 399: sockaddr_in_init(&src, &ip->ip_src, uh->uh_sport);
400: sockaddr_in_init(&dst, &ip->ip_dst, uh->uh_dport);
1.53 itojun 401:
1.144 manu 402: if ((n = udp4_realinput(&src, &dst, &m, iphlen)) == -1) {
1.166 thorpej 403: UDP_STATINC(UDP_STAT_HDROPS);
1.144 manu 404: return;
405: }
1.188 christos 406: if (m == NULL) {
407: /*
408: * packet has been processed by ESP stuff -
409: * e.g. dropped NAT-T-keep-alive-packet ...
410: */
411: return;
412: }
413: ip = mtod(m, struct ip *);
1.53 itojun 414: #ifdef INET6
415: if (IN_MULTICAST(ip->ip_dst.s_addr) || n == 0) {
416: struct sockaddr_in6 src6, dst6;
417:
1.175 cegger 418: memset(&src6, 0, sizeof(src6));
1.53 itojun 419: src6.sin6_family = AF_INET6;
420: src6.sin6_len = sizeof(struct sockaddr_in6);
1.224 rtr 421: in6_in_2_v4mapin6(&ip->ip_src, &src6.sin6_addr);
1.53 itojun 422: src6.sin6_port = uh->uh_sport;
1.175 cegger 423: memset(&dst6, 0, sizeof(dst6));
1.53 itojun 424: dst6.sin6_family = AF_INET6;
425: dst6.sin6_len = sizeof(struct sockaddr_in6);
1.224 rtr 426: in6_in_2_v4mapin6(&ip->ip_dst, &dst6.sin6_addr);
1.53 itojun 427: dst6.sin6_port = uh->uh_dport;
428:
429: n += udp6_realinput(AF_INET, &src6, &dst6, m, iphlen);
430: }
431: #endif
432:
433: if (n == 0) {
434: if (m->m_flags & (M_BCAST | M_MCAST)) {
1.166 thorpej 435: UDP_STATINC(UDP_STAT_NOPORTBCAST);
1.53 itojun 436: goto bad;
437: }
1.166 thorpej 438: UDP_STATINC(UDP_STAT_NOPORT);
1.64 ws 439: #ifdef IPKDB
1.53 itojun 440: if (checkipkdb(&ip->ip_src, uh->uh_sport, uh->uh_dport,
441: m, iphlen + sizeof(struct udphdr),
442: m->m_pkthdr.len - iphlen - sizeof(struct udphdr))) {
443: /*
444: * It was a debugger connect packet,
445: * just drop it now
446: */
447: goto bad;
448: }
449: #endif
450: icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0);
451: m = NULL;
452: }
453:
454: bad:
455: if (m)
456: m_freem(m);
1.78 thorpej 457: return;
458:
459: badcsum:
460: m_freem(m);
1.53 itojun 461: }
1.72 itojun 462: #endif
1.53 itojun 463:
1.72 itojun 464: #ifdef INET
1.53 itojun 465: static void
1.119 matt 466: udp4_sendup(struct mbuf *m, int off /* offset of data portion */,
467: struct sockaddr *src, struct socket *so)
1.53 itojun 468: {
469: struct mbuf *opts = NULL;
470: struct mbuf *n;
471: struct inpcb *inp = NULL;
472:
473: if (!so)
474: return;
475: switch (so->so_proto->pr_domain->dom_family) {
476: case AF_INET:
477: inp = sotoinpcb(so);
478: break;
479: #ifdef INET6
480: case AF_INET6:
481: break;
482: #endif
483: default:
484: return;
485: }
486:
1.190 christos 487: #if defined(IPSEC)
1.53 itojun 488: /* check AH/ESP integrity. */
1.199 christos 489: if (ipsec_used && so != NULL && ipsec4_in_reject_so(m, so)) {
1.169 thorpej 490: IPSEC_STATINC(IPSEC_STAT_IN_POLVIO);
1.162 dyoung 491: if ((n = m_copypacket(m, M_DONTWAIT)) != NULL)
1.110 itojun 492: icmp_error(n, ICMP_UNREACH, ICMP_UNREACH_ADMIN_PROHIBIT,
493: 0, 0);
1.53 itojun 494: return;
495: }
496: #endif /*IPSEC*/
497:
1.162 dyoung 498: if ((n = m_copypacket(m, M_DONTWAIT)) != NULL) {
1.53 itojun 499: if (inp && (inp->inp_flags & INP_CONTROLOPTS
1.174 christos 500: #ifdef SO_OTIMESTAMP
501: || so->so_options & SO_OTIMESTAMP
502: #endif
1.53 itojun 503: || so->so_options & SO_TIMESTAMP)) {
504: struct ip *ip = mtod(n, struct ip *);
505: ip_savecontrol(inp, &opts, ip, n);
506: }
507:
508: m_adj(n, off);
509: if (sbappendaddr(&so->so_rcv, src, n,
510: opts) == 0) {
511: m_freem(n);
512: if (opts)
513: m_freem(opts);
1.124 darrenr 514: so->so_rcv.sb_overflowed++;
1.166 thorpej 515: UDP_STATINC(UDP_STAT_FULLSOCK);
1.53 itojun 516: } else
517: sorwakeup(so);
518: }
519: }
1.72 itojun 520: #endif
1.53 itojun 521:
1.72 itojun 522: #ifdef INET
1.53 itojun 523: static int
1.119 matt 524: udp4_realinput(struct sockaddr_in *src, struct sockaddr_in *dst,
1.144 manu 525: struct mbuf **mp, int off /* offset of udphdr */)
1.53 itojun 526: {
527: u_int16_t *sport, *dport;
528: int rcvcnt;
529: struct in_addr *src4, *dst4;
1.109 itojun 530: struct inpcb_hdr *inph;
1.53 itojun 531: struct inpcb *inp;
1.144 manu 532: struct mbuf *m = *mp;
1.53 itojun 533:
534: rcvcnt = 0;
535: off += sizeof(struct udphdr); /* now, offset of payload */
536:
537: if (src->sin_family != AF_INET || dst->sin_family != AF_INET)
538: goto bad;
539:
540: src4 = &src->sin_addr;
541: sport = &src->sin_port;
542: dst4 = &dst->sin_addr;
543: dport = &dst->sin_port;
544:
1.73 itojun 545: if (IN_MULTICAST(dst4->s_addr) ||
1.226 ozaki-r 546: in_broadcast(*dst4, m_get_rcvif_NOMPSAFE(m))) {
1.53 itojun 547: /*
548: * Deliver a multicast or broadcast datagram to *all* sockets
549: * for which the local and remote addresses and ports match
550: * those of the incoming datagram. This allows more than
551: * one process to receive multi/broadcasts on the same port.
552: * (This really ought to be done for unicast datagrams as
553: * well, but that would cause problems with existing
554: * applications that open both address-specific sockets and
555: * a wildcard socket listening to the same port -- they would
556: * end up receiving duplicates of every unicast datagram.
557: * Those applications open the multiple sockets to overcome an
558: * inadequacy of the UDP socket interface, but for backwards
559: * compatibility we avoid the problem here rather than
560: * fixing the interface. Maybe 4.5BSD will remedy this?)
561: */
562:
563: /*
1.92 itojun 564: * KAME note: traditionally we dropped udpiphdr from mbuf here.
1.71 itojun 565: * we need udpiphdr for IPsec processing so we do that later.
1.53 itojun 566: */
567: /*
568: * Locate pcb(s) for datagram.
569: */
1.191 christos 570: TAILQ_FOREACH(inph, &udbtable.inpt_queue, inph_queue) {
1.109 itojun 571: inp = (struct inpcb *)inph;
572: if (inp->inp_af != AF_INET)
573: continue;
574:
1.53 itojun 575: if (inp->inp_lport != *dport)
576: continue;
577: if (!in_nullhost(inp->inp_laddr)) {
578: if (!in_hosteq(inp->inp_laddr, *dst4))
579: continue;
580: }
581: if (!in_nullhost(inp->inp_faddr)) {
582: if (!in_hosteq(inp->inp_faddr, *src4) ||
583: inp->inp_fport != *sport)
584: continue;
585: }
586:
587: udp4_sendup(m, off, (struct sockaddr *)src,
588: inp->inp_socket);
589: rcvcnt++;
590:
591: /*
592: * Don't look for additional matches if this one does
593: * not have either the SO_REUSEPORT or SO_REUSEADDR
594: * socket options set. This heuristic avoids searching
595: * through all pcbs in the common case of a non-shared
596: * port. It assumes that an application will never
597: * clear these options after setting them.
598: */
599: if ((inp->inp_socket->so_options &
600: (SO_REUSEPORT|SO_REUSEADDR)) == 0)
601: break;
602: }
603: } else {
604: /*
605: * Locate pcb for datagram.
606: */
1.180 dyoung 607: inp = in_pcblookup_connect(&udbtable, *src4, *sport, *dst4,
608: *dport, 0);
1.53 itojun 609: if (inp == 0) {
1.166 thorpej 610: UDP_STATINC(UDP_STAT_PCBHASHMISS);
1.53 itojun 611: inp = in_pcblookup_bind(&udbtable, *dst4, *dport);
1.82 itojun 612: if (inp == 0)
1.53 itojun 613: return rcvcnt;
614: }
615:
1.190 christos 616: #ifdef IPSEC
1.130 manu 617: /* Handle ESP over UDP */
618: if (inp->inp_flags & INP_ESPINUDP_ALL) {
619: struct sockaddr *sa = (struct sockaddr *)src;
620:
1.144 manu 621: switch(udp4_espinudp(mp, off, sa, inp->inp_socket)) {
622: case -1: /* Error, m was freeed */
623: rcvcnt = -1;
624: goto bad;
625: break;
626:
627: case 1: /* ESP over UDP */
1.130 manu 628: rcvcnt++;
629: goto bad;
1.144 manu 630: break;
631:
632: case 0: /* plain UDP */
633: default: /* Unexpected */
634: /*
635: * Normal UDP processing will take place
636: * m may have changed.
637: */
638: m = *mp;
639: break;
1.130 manu 640: }
641: }
1.189 christos 642: #endif
1.130 manu 643:
1.178 minskim 644: /*
645: * Check the minimum TTL for socket.
646: */
647: if (mtod(m, struct ip *)->ip_ttl < inp->inp_ip_minttl)
648: goto bad;
649:
1.53 itojun 650: udp4_sendup(m, off, (struct sockaddr *)src, inp->inp_socket);
651: rcvcnt++;
652: }
653:
654: bad:
655: return rcvcnt;
656: }
1.72 itojun 657: #endif
1.53 itojun 658:
1.72 itojun 659: #ifdef INET
1.1 cgd 660: /*
661: * Notify a udp user of an asynchronous error;
662: * just wake up so that he can collect error status.
663: */
1.7 mycroft 664: static void
1.119 matt 665: udp_notify(struct inpcb *inp, int errno)
1.1 cgd 666: {
667: inp->inp_socket->so_error = errno;
668: sorwakeup(inp->inp_socket);
669: sowwakeup(inp->inp_socket);
670: }
671:
1.27 christos 672: void *
1.157 dyoung 673: udp_ctlinput(int cmd, const struct sockaddr *sa, void *v)
1.1 cgd 674: {
1.66 augustss 675: struct ip *ip = v;
676: struct udphdr *uh;
1.119 matt 677: void (*notify)(struct inpcb *, int) = udp_notify;
1.21 mycroft 678: int errno;
1.1 cgd 679:
1.53 itojun 680: if (sa->sa_family != AF_INET
681: || sa->sa_len != sizeof(struct sockaddr_in))
1.51 itojun 682: return NULL;
1.20 mycroft 683: if ((unsigned)cmd >= PRC_NCMDS)
1.27 christos 684: return NULL;
1.20 mycroft 685: errno = inetctlerrmap[cmd];
1.18 mycroft 686: if (PRC_IS_REDIRECT(cmd))
1.19 mycroft 687: notify = in_rtchange, ip = 0;
1.18 mycroft 688: else if (cmd == PRC_HOSTDEAD)
1.19 mycroft 689: ip = 0;
1.23 cgd 690: else if (errno == 0)
1.27 christos 691: return NULL;
1.19 mycroft 692: if (ip) {
1.158 christos 693: uh = (struct udphdr *)((char *)ip + (ip->ip_hl << 2));
1.157 dyoung 694: in_pcbnotify(&udbtable, satocsin(sa)->sin_addr, uh->uh_dport,
1.34 mycroft 695: ip->ip_src, uh->uh_sport, errno, notify);
1.53 itojun 696:
697: /* XXX mapped address case */
1.19 mycroft 698: } else
1.157 dyoung 699: in_pcbnotifyall(&udbtable, satocsin(sa)->sin_addr, errno,
1.34 mycroft 700: notify);
1.27 christos 701: return NULL;
1.1 cgd 702: }
703:
1.7 mycroft 704: int
1.173 plunky 705: udp_ctloutput(int op, struct socket *so, struct sockopt *sopt)
1.130 manu 706: {
707: int s;
708: int error = 0;
709: struct inpcb *inp;
710: int family;
1.173 plunky 711: int optval;
1.130 manu 712:
713: family = so->so_proto->pr_domain->dom_family;
714:
715: s = splsoftnet();
716: switch (family) {
717: #ifdef INET
718: case PF_INET:
1.173 plunky 719: if (sopt->sopt_level != IPPROTO_UDP) {
720: error = ip_ctloutput(op, so, sopt);
1.130 manu 721: goto end;
722: }
723: break;
724: #endif
725: #ifdef INET6
726: case PF_INET6:
1.173 plunky 727: if (sopt->sopt_level != IPPROTO_UDP) {
728: error = ip6_ctloutput(op, so, sopt);
1.130 manu 729: goto end;
730: }
731: break;
732: #endif
733: default:
734: error = EAFNOSUPPORT;
735: goto end;
736: }
737:
738:
739: switch (op) {
740: case PRCO_SETOPT:
741: inp = sotoinpcb(so);
742:
1.173 plunky 743: switch (sopt->sopt_name) {
1.130 manu 744: case UDP_ENCAP:
1.173 plunky 745: error = sockopt_getint(sopt, &optval);
746: if (error)
1.153 yamt 747: break;
1.131 perry 748:
1.173 plunky 749: switch(optval) {
1.130 manu 750: case 0:
751: inp->inp_flags &= ~INP_ESPINUDP_ALL;
752: break;
753:
754: case UDP_ENCAP_ESPINUDP:
755: inp->inp_flags &= ~INP_ESPINUDP_ALL;
756: inp->inp_flags |= INP_ESPINUDP;
757: break;
1.131 perry 758:
1.130 manu 759: case UDP_ENCAP_ESPINUDP_NON_IKE:
760: inp->inp_flags &= ~INP_ESPINUDP_ALL;
761: inp->inp_flags |= INP_ESPINUDP_NON_IKE;
762: break;
763: default:
764: error = EINVAL;
765: break;
766: }
767: break;
1.183 christos 768:
1.130 manu 769: default:
770: error = ENOPROTOOPT;
771: break;
772: }
773: break;
774:
775: default:
776: error = EINVAL;
777: break;
1.131 perry 778: }
779:
1.130 manu 780: end:
781: splx(s);
782: return error;
783: }
1.131 perry 784:
1.130 manu 785:
786: int
1.223 riastrad 787: udp_output(struct mbuf *m, struct inpcb *inp)
1.27 christos 788: {
1.66 augustss 789: struct udpiphdr *ui;
1.125 thorpej 790: struct route *ro;
1.66 augustss 791: int len = m->m_pkthdr.len;
1.31 mycroft 792: int error = 0;
1.27 christos 793:
1.98 matt 794: MCLAIM(m, &udp_tx_mowner);
1.1 cgd 795:
796: /*
797: * Calculate data length and get a mbuf
798: * for UDP and IP headers.
799: */
1.13 mycroft 800: M_PREPEND(m, sizeof(struct udpiphdr), M_DONTWAIT);
801: if (m == 0) {
802: error = ENOBUFS;
1.39 thorpej 803: goto release;
804: }
805:
806: /*
807: * Compute the packet length of the IP header, and
808: * punt if the length looks bogus.
809: */
1.96 itojun 810: if (len + sizeof(struct udpiphdr) > IP_MAXPACKET) {
1.39 thorpej 811: error = EMSGSIZE;
1.13 mycroft 812: goto release;
813: }
1.1 cgd 814:
815: /*
816: * Fill in mbuf with extended UDP header
817: * and addresses and length put into network format.
818: */
819: ui = mtod(m, struct udpiphdr *);
820: ui->ui_pr = IPPROTO_UDP;
821: ui->ui_src = inp->inp_laddr;
822: ui->ui_dst = inp->inp_faddr;
823: ui->ui_sport = inp->inp_lport;
824: ui->ui_dport = inp->inp_fport;
1.78 thorpej 825: ui->ui_ulen = htons((u_int16_t)len + sizeof(struct udphdr));
1.1 cgd 826:
1.125 thorpej 827: ro = &inp->inp_route;
828:
1.1 cgd 829: /*
1.78 thorpej 830: * Set up checksum and output datagram.
1.1 cgd 831: */
832: if (udpcksum) {
1.78 thorpej 833: /*
834: * XXX Cache pseudo-header checksum part for
835: * XXX "connected" UDP sockets.
836: */
837: ui->ui_sum = in_cksum_phdr(ui->ui_src.s_addr,
838: ui->ui_dst.s_addr, htons((u_int16_t)len +
839: sizeof(struct udphdr) + IPPROTO_UDP));
1.135 yamt 840: m->m_pkthdr.csum_flags = M_CSUM_UDPv4;
1.78 thorpej 841: m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum);
842: } else
843: ui->ui_sum = 0;
1.96 itojun 844: ((struct ip *)ui)->ip_len = htons(sizeof (struct udpiphdr) + len);
1.1 cgd 845: ((struct ip *)ui)->ip_ttl = inp->inp_ip.ip_ttl; /* XXX */
846: ((struct ip *)ui)->ip_tos = inp->inp_ip.ip_tos; /* XXX */
1.166 thorpej 847: UDP_STATINC(UDP_STAT_OPACKETS);
1.48 itojun 848:
1.125 thorpej 849: return (ip_output(m, inp->inp_options, ro,
1.12 mycroft 850: inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST),
1.107 itojun 851: inp->inp_moptions, inp->inp_socket));
1.1 cgd 852:
853: release:
854: m_freem(m);
855: return (error);
856: }
857:
1.196 rmind 858: static int
859: udp_attach(struct socket *so, int proto)
860: {
861: struct inpcb *inp;
862: int error;
863:
864: KASSERT(sotoinpcb(so) == NULL);
865:
866: /* Assign the lock (must happen even if we will error out). */
867: sosetlock(so);
868:
869: #ifdef MBUFTRACE
870: so->so_mowner = &udp_mowner;
871: so->so_rcv.sb_mowner = &udp_rx_mowner;
872: so->so_snd.sb_mowner = &udp_tx_mowner;
873: #endif
874: if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
875: error = soreserve(so, udp_sendspace, udp_recvspace);
876: if (error) {
877: return error;
878: }
879: }
880:
881: error = in_pcballoc(so, &udbtable);
882: if (error) {
883: return error;
884: }
885: inp = sotoinpcb(so);
886: inp->inp_ip.ip_ttl = ip_defttl;
887: KASSERT(solocked(so));
888:
889: return error;
890: }
891:
892: static void
893: udp_detach(struct socket *so)
894: {
895: struct inpcb *inp;
896:
897: KASSERT(solocked(so));
898: inp = sotoinpcb(so);
899: KASSERT(inp != NULL);
900: in_pcbdetach(inp);
901: }
1.1 cgd 902:
1.195 rmind 903: static int
1.219 rtr 904: udp_accept(struct socket *so, struct sockaddr *nam)
1.208 rtr 905: {
906: KASSERT(solocked(so));
907:
908: panic("udp_accept");
1.210 rtr 909:
1.208 rtr 910: return EOPNOTSUPP;
911: }
912:
913: static int
1.218 rtr 914: udp_bind(struct socket *so, struct sockaddr *nam, struct lwp *l)
1.210 rtr 915: {
916: struct inpcb *inp = sotoinpcb(so);
1.218 rtr 917: struct sockaddr_in *sin = (struct sockaddr_in *)nam;
1.210 rtr 918: int error = 0;
919: int s;
920:
921: KASSERT(solocked(so));
922: KASSERT(inp != NULL);
923: KASSERT(nam != NULL);
924:
925: s = splsoftnet();
1.218 rtr 926: error = in_pcbbind(inp, sin, l);
1.210 rtr 927: splx(s);
928:
929: return error;
930: }
931:
932: static int
1.214 rtr 933: udp_listen(struct socket *so, struct lwp *l)
1.210 rtr 934: {
935: KASSERT(solocked(so));
936:
937: return EOPNOTSUPP;
938: }
939:
1.211 rtr 940: static int
1.221 rtr 941: udp_connect(struct socket *so, struct sockaddr *nam, struct lwp *l)
1.211 rtr 942: {
943: struct inpcb *inp = sotoinpcb(so);
944: int error = 0;
945: int s;
946:
947: KASSERT(solocked(so));
948: KASSERT(inp != NULL);
949: KASSERT(nam != NULL);
950:
951: s = splsoftnet();
1.221 rtr 952: error = in_pcbconnect(inp, (struct sockaddr_in *)nam, l);
1.211 rtr 953: if (! error)
954: soisconnected(so);
955: splx(s);
956: return error;
957: }
1.210 rtr 958:
959: static int
1.217 rtr 960: udp_connect2(struct socket *so, struct socket *so2)
961: {
962: KASSERT(solocked(so));
963:
964: return EOPNOTSUPP;
965: }
966:
967: static int
1.212 rtr 968: udp_disconnect(struct socket *so)
969: {
970: struct inpcb *inp = sotoinpcb(so);
971: int s;
972:
973: KASSERT(solocked(so));
974: KASSERT(inp != NULL);
975:
976: s = splsoftnet();
977: /*soisdisconnected(so);*/
978: so->so_state &= ~SS_ISCONNECTED; /* XXX */
979: in_pcbdisconnect(inp);
980: inp->inp_laddr = zeroin_addr; /* XXX */
981: in_pcbstate(inp, INP_BOUND); /* XXX */
982: splx(s);
983:
984: return 0;
985: }
986:
987: static int
988: udp_shutdown(struct socket *so)
989: {
990: int s;
991:
992: KASSERT(solocked(so));
993:
994: s = splsoftnet();
995: socantsendmore(so);
996: splx(s);
997:
998: return 0;
999: }
1000:
1001: static int
1002: udp_abort(struct socket *so)
1003: {
1004: KASSERT(solocked(so));
1005:
1006: panic("udp_abort");
1007:
1008: return EOPNOTSUPP;
1009: }
1010:
1011: static int
1.202 rtr 1012: udp_ioctl(struct socket *so, u_long cmd, void *nam, struct ifnet *ifp)
1.200 rtr 1013: {
1.202 rtr 1014: return in_control(so, cmd, nam, ifp);
1.200 rtr 1015: }
1016:
1017: static int
1.203 rtr 1018: udp_stat(struct socket *so, struct stat *ub)
1019: {
1.206 rtr 1020: KASSERT(solocked(so));
1021:
1.205 rtr 1022: /* stat: don't bother with a blocksize. */
1023: return 0;
1.203 rtr 1024: }
1025:
1026: static int
1.219 rtr 1027: udp_peeraddr(struct socket *so, struct sockaddr *nam)
1.207 rtr 1028: {
1.213 rtr 1029: int s;
1030:
1.207 rtr 1031: KASSERT(solocked(so));
1032: KASSERT(sotoinpcb(so) != NULL);
1033: KASSERT(nam != NULL);
1034:
1.213 rtr 1035: s = splsoftnet();
1.219 rtr 1036: in_setpeeraddr(sotoinpcb(so), (struct sockaddr_in *)nam);
1.213 rtr 1037: splx(s);
1038:
1.207 rtr 1039: return 0;
1040: }
1041:
1042: static int
1.219 rtr 1043: udp_sockaddr(struct socket *so, struct sockaddr *nam)
1.207 rtr 1044: {
1.213 rtr 1045: int s;
1046:
1.207 rtr 1047: KASSERT(solocked(so));
1048: KASSERT(sotoinpcb(so) != NULL);
1049: KASSERT(nam != NULL);
1050:
1.213 rtr 1051: s = splsoftnet();
1.219 rtr 1052: in_setsockaddr(sotoinpcb(so), (struct sockaddr_in *)nam);
1.213 rtr 1053: splx(s);
1054:
1.207 rtr 1055: return 0;
1056: }
1057:
1058: static int
1.216 rtr 1059: udp_rcvd(struct socket *so, int flags, struct lwp *l)
1060: {
1061: KASSERT(solocked(so));
1062:
1063: return EOPNOTSUPP;
1064: }
1065:
1066: static int
1.209 rtr 1067: udp_recvoob(struct socket *so, struct mbuf *m, int flags)
1068: {
1069: KASSERT(solocked(so));
1070:
1071: return EOPNOTSUPP;
1072: }
1073:
1074: static int
1.221 rtr 1075: udp_send(struct socket *so, struct mbuf *m, struct sockaddr *nam,
1.215 rtr 1076: struct mbuf *control, struct lwp *l)
1077: {
1078: struct inpcb *inp = sotoinpcb(so);
1079: int error = 0;
1080: struct in_addr laddr; /* XXX */
1081: int s;
1082:
1083: KASSERT(solocked(so));
1084: KASSERT(inp != NULL);
1085: KASSERT(m != NULL);
1086:
1087: if (control && control->m_len) {
1088: m_freem(control);
1089: m_freem(m);
1090: return EINVAL;
1091: }
1092:
1093: memset(&laddr, 0, sizeof laddr);
1094:
1095: s = splsoftnet();
1096: if (nam) {
1097: laddr = inp->inp_laddr; /* XXX */
1098: if ((so->so_state & SS_ISCONNECTED) != 0) {
1099: error = EISCONN;
1100: goto die;
1101: }
1.221 rtr 1102: error = in_pcbconnect(inp, (struct sockaddr_in *)nam, l);
1.215 rtr 1103: if (error)
1104: goto die;
1105: } else {
1106: if ((so->so_state & SS_ISCONNECTED) == 0) {
1107: error = ENOTCONN;
1108: goto die;
1109: }
1110: }
1111: error = udp_output(m, inp);
1112: m = NULL;
1113: if (nam) {
1114: in_pcbdisconnect(inp);
1115: inp->inp_laddr = laddr; /* XXX */
1116: in_pcbstate(inp, INP_BOUND); /* XXX */
1117: }
1118: die:
1119: if (m)
1120: m_freem(m);
1121:
1122: splx(s);
1123: return error;
1124: }
1125:
1126: static int
1.209 rtr 1127: udp_sendoob(struct socket *so, struct mbuf *m, struct mbuf *control)
1128: {
1129: KASSERT(solocked(so));
1130:
1131: m_freem(m);
1132: m_freem(control);
1133:
1134: return EOPNOTSUPP;
1135: }
1136:
1137: static int
1.217 rtr 1138: udp_purgeif(struct socket *so, struct ifnet *ifp)
1139: {
1140: int s;
1141:
1142: s = splsoftnet();
1.229 ! knakahar 1143: #ifndef NET_MPSAFE
1.217 rtr 1144: mutex_enter(softnet_lock);
1.229 ! knakahar 1145: #endif
1.217 rtr 1146: in_pcbpurgeif0(&udbtable, ifp);
1147: in_purgeif(ifp);
1148: in_pcbpurgeif(&udbtable, ifp);
1.229 ! knakahar 1149: #ifndef NET_MPSAFE
1.217 rtr 1150: mutex_exit(softnet_lock);
1.229 ! knakahar 1151: #endif
1.217 rtr 1152: splx(s);
1153:
1154: return 0;
1155: }
1156:
1157: static int
1.166 thorpej 1158: sysctl_net_inet_udp_stats(SYSCTLFN_ARGS)
1159: {
1160:
1.172 thorpej 1161: return (NETSTAT_SYSCTL(udpstat_percpu, UDP_NSTATS));
1.166 thorpej 1162: }
1163:
1.13 mycroft 1164: /*
1165: * Sysctl for udp variables.
1166: */
1.179 pooka 1167: static void
1168: sysctl_net_inet_udp_setup(struct sysctllog **clog)
1.13 mycroft 1169: {
1.194 pooka 1170:
1.116 atatat 1171: sysctl_createv(clog, 0, NULL, NULL,
1172: CTLFLAG_PERMANENT,
1.114 atatat 1173: CTLTYPE_NODE, "inet", NULL,
1174: NULL, 0, NULL, 0,
1175: CTL_NET, PF_INET, CTL_EOL);
1.116 atatat 1176: sysctl_createv(clog, 0, NULL, NULL,
1177: CTLFLAG_PERMANENT,
1.122 atatat 1178: CTLTYPE_NODE, "udp",
1179: SYSCTL_DESCR("UDPv4 related settings"),
1.114 atatat 1180: NULL, 0, NULL, 0,
1181: CTL_NET, PF_INET, IPPROTO_UDP, CTL_EOL);
1182:
1.116 atatat 1183: sysctl_createv(clog, 0, NULL, NULL,
1184: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.122 atatat 1185: CTLTYPE_INT, "checksum",
1.123 heas 1186: SYSCTL_DESCR("Compute UDP checksums"),
1.114 atatat 1187: NULL, 0, &udpcksum, 0,
1188: CTL_NET, PF_INET, IPPROTO_UDP, UDPCTL_CHECKSUM,
1189: CTL_EOL);
1.116 atatat 1190: sysctl_createv(clog, 0, NULL, NULL,
1191: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.122 atatat 1192: CTLTYPE_INT, "sendspace",
1193: SYSCTL_DESCR("Default UDP send buffer size"),
1.114 atatat 1194: NULL, 0, &udp_sendspace, 0,
1195: CTL_NET, PF_INET, IPPROTO_UDP, UDPCTL_SENDSPACE,
1196: CTL_EOL);
1.116 atatat 1197: sysctl_createv(clog, 0, NULL, NULL,
1198: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.122 atatat 1199: CTLTYPE_INT, "recvspace",
1200: SYSCTL_DESCR("Default UDP receive buffer size"),
1.114 atatat 1201: NULL, 0, &udp_recvspace, 0,
1202: CTL_NET, PF_INET, IPPROTO_UDP, UDPCTL_RECVSPACE,
1203: CTL_EOL);
1.125 thorpej 1204: sysctl_createv(clog, 0, NULL, NULL,
1205: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1206: CTLTYPE_INT, "do_loopback_cksum",
1207: SYSCTL_DESCR("Perform UDP checksum on loopback"),
1208: NULL, 0, &udp_do_loopback_cksum, 0,
1209: CTL_NET, PF_INET, IPPROTO_UDP, UDPCTL_LOOPBACKCKSUM,
1210: CTL_EOL);
1.132 atatat 1211: sysctl_createv(clog, 0, NULL, NULL,
1212: CTLFLAG_PERMANENT,
1.134 atatat 1213: CTLTYPE_STRUCT, "pcblist",
1.132 atatat 1214: SYSCTL_DESCR("UDP protocol control block list"),
1215: sysctl_inpcblist, 0, &udbtable, 0,
1216: CTL_NET, PF_INET, IPPROTO_UDP, CTL_CREATE,
1217: CTL_EOL);
1.139 elad 1218: sysctl_createv(clog, 0, NULL, NULL,
1219: CTLFLAG_PERMANENT,
1220: CTLTYPE_STRUCT, "stats",
1221: SYSCTL_DESCR("UDP statistics"),
1.166 thorpej 1222: sysctl_net_inet_udp_stats, 0, NULL, 0,
1.139 elad 1223: CTL_NET, PF_INET, IPPROTO_UDP, UDPCTL_STATS,
1224: CTL_EOL);
1.1 cgd 1225: }
1.72 itojun 1226: #endif
1.130 manu 1227:
1.166 thorpej 1228: void
1229: udp_statinc(u_int stat)
1230: {
1231:
1232: KASSERT(stat < UDP_NSTATS);
1233: UDP_STATINC(stat);
1234: }
1235:
1.190 christos 1236: #if defined(INET) && defined(IPSEC)
1.130 manu 1237: /*
1238: * Returns:
1239: * 1 if the packet was processed
1240: * 0 if normal UDP processing should take place
1.144 manu 1241: * -1 if an error occurent and m was freed
1.130 manu 1242: */
1243: static int
1.154 yamt 1244: udp4_espinudp(struct mbuf **mp, int off, struct sockaddr *src,
1.151 christos 1245: struct socket *so)
1.130 manu 1246: {
1247: size_t len;
1.158 christos 1248: void *data;
1.130 manu 1249: struct inpcb *inp;
1250: size_t skip = 0;
1251: size_t minlen;
1252: size_t iphdrlen;
1253: struct ip *ip;
1.136 manu 1254: struct m_tag *tag;
1255: struct udphdr *udphdr;
1256: u_int16_t sport, dport;
1.144 manu 1257: struct mbuf *m = *mp;
1.130 manu 1258:
1.131 perry 1259: /*
1.130 manu 1260: * Collapse the mbuf chain if the first mbuf is too short
1261: * The longest case is: UDP + non ESP marker + ESP
1262: */
1263: minlen = off + sizeof(u_int64_t) + sizeof(struct esp);
1264: if (minlen > m->m_pkthdr.len)
1265: minlen = m->m_pkthdr.len;
1266:
1267: if (m->m_len < minlen) {
1.144 manu 1268: if ((*mp = m_pullup(m, minlen)) == NULL) {
1.130 manu 1269: printf("udp4_espinudp: m_pullup failed\n");
1.144 manu 1270: return -1;
1.130 manu 1271: }
1.144 manu 1272: m = *mp;
1.130 manu 1273: }
1274:
1.131 perry 1275: len = m->m_len - off;
1.158 christos 1276: data = mtod(m, char *) + off;
1.130 manu 1277: inp = sotoinpcb(so);
1278:
1279: /* Ignore keepalive packets */
1.158 christos 1280: if ((len == 1) && (*(unsigned char *)data == 0xff)) {
1.188 christos 1281: m_free(m);
1282: *mp = NULL; /* avoid any further processiong by caller ... */
1.130 manu 1283: return 1;
1284: }
1285:
1.131 perry 1286: /*
1287: * Check that the payload is long enough to hold
1.130 manu 1288: * an ESP header and compute the length of encapsulation
1.131 perry 1289: * header to remove
1.130 manu 1290: */
1291: if (inp->inp_flags & INP_ESPINUDP) {
1292: u_int32_t *st = (u_int32_t *)data;
1293:
1294: if ((len <= sizeof(struct esp)) || (*st == 0))
1295: return 0; /* Normal UDP processing */
1296:
1297: skip = sizeof(struct udphdr);
1298: }
1299:
1300: if (inp->inp_flags & INP_ESPINUDP_NON_IKE) {
1.142 kleink 1301: u_int32_t *st = (u_int32_t *)data;
1.130 manu 1302:
1303: if ((len <= sizeof(u_int64_t) + sizeof(struct esp))
1.142 kleink 1304: || ((st[0] | st[1]) != 0))
1.130 manu 1305: return 0; /* Normal UDP processing */
1.131 perry 1306:
1.130 manu 1307: skip = sizeof(struct udphdr) + sizeof(u_int64_t);
1308: }
1309:
1310: /*
1.136 manu 1311: * Get the UDP ports. They are handled in network
1312: * order everywhere in IPSEC_NAT_T code.
1313: */
1.158 christos 1314: udphdr = (struct udphdr *)((char *)data - skip);
1.136 manu 1315: sport = udphdr->uh_sport;
1316: dport = udphdr->uh_dport;
1317:
1318: /*
1.130 manu 1319: * Remove the UDP header (and possibly the non ESP marker)
1320: * IP header lendth is iphdrlen
1.131 perry 1321: * Before:
1.130 manu 1322: * <--- off --->
1323: * +----+------+-----+
1324: * | IP | UDP | ESP |
1325: * +----+------+-----+
1326: * <-skip->
1327: * After:
1328: * +----+-----+
1329: * | IP | ESP |
1330: * +----+-----+
1331: * <-skip->
1332: */
1333: iphdrlen = off - sizeof(struct udphdr);
1.158 christos 1334: memmove(mtod(m, char *) + skip, mtod(m, void *), iphdrlen);
1.130 manu 1335: m_adj(m, skip);
1336:
1337: ip = mtod(m, struct ip *);
1338: ip->ip_len = htons(ntohs(ip->ip_len) - skip);
1339: ip->ip_p = IPPROTO_ESP;
1340:
1341: /*
1.188 christos 1342: * We have modified the packet - it is now ESP, so we should not
1343: * return to UDP processing ...
1344: *
1.136 manu 1345: * Add a PACKET_TAG_IPSEC_NAT_T_PORT tag to remember
1346: * the source UDP port. This is required if we want
1347: * to select the right SPD for multiple hosts behind
1348: * same NAT
1349: */
1.137 manu 1350: if ((tag = m_tag_get(PACKET_TAG_IPSEC_NAT_T_PORTS,
1351: sizeof(sport) + sizeof(dport), M_DONTWAIT)) == NULL) {
1352: printf("udp4_espinudp: m_tag_get failed\n");
1.188 christos 1353: m_freem(m);
1354: return -1;
1.137 manu 1355: }
1.136 manu 1356: ((u_int16_t *)(tag + 1))[0] = sport;
1357: ((u_int16_t *)(tag + 1))[1] = dport;
1.188 christos 1358: m_tag_prepend(m, tag);
1.136 manu 1359:
1.199 christos 1360: if (ipsec_used)
1361: ipsec4_common_input(m, iphdrlen, IPPROTO_ESP);
1362: /* XXX: else */
1.130 manu 1363:
1.185 liamjfoy 1364: /* We handled it, it shouldn't be handled by UDP */
1.188 christos 1365: *mp = NULL; /* avoid free by caller ... */
1.130 manu 1366: return 1;
1367: }
1368: #endif
1.195 rmind 1369:
1.197 rmind 1370: PR_WRAP_USRREQS(udp)
1371: #define udp_attach udp_attach_wrapper
1372: #define udp_detach udp_detach_wrapper
1.208 rtr 1373: #define udp_accept udp_accept_wrapper
1.210 rtr 1374: #define udp_bind udp_bind_wrapper
1375: #define udp_listen udp_listen_wrapper
1.211 rtr 1376: #define udp_connect udp_connect_wrapper
1.217 rtr 1377: #define udp_connect2 udp_connect2_wrapper
1.212 rtr 1378: #define udp_disconnect udp_disconnect_wrapper
1379: #define udp_shutdown udp_shutdown_wrapper
1380: #define udp_abort udp_abort_wrapper
1.200 rtr 1381: #define udp_ioctl udp_ioctl_wrapper
1.203 rtr 1382: #define udp_stat udp_stat_wrapper
1.207 rtr 1383: #define udp_peeraddr udp_peeraddr_wrapper
1384: #define udp_sockaddr udp_sockaddr_wrapper
1.216 rtr 1385: #define udp_rcvd udp_rcvd_wrapper
1.209 rtr 1386: #define udp_recvoob udp_recvoob_wrapper
1.215 rtr 1387: #define udp_send udp_send_wrapper
1.209 rtr 1388: #define udp_sendoob udp_sendoob_wrapper
1.217 rtr 1389: #define udp_purgeif udp_purgeif_wrapper
1.195 rmind 1390:
1391: const struct pr_usrreqs udp_usrreqs = {
1.196 rmind 1392: .pr_attach = udp_attach,
1393: .pr_detach = udp_detach,
1.208 rtr 1394: .pr_accept = udp_accept,
1.210 rtr 1395: .pr_bind = udp_bind,
1396: .pr_listen = udp_listen,
1.211 rtr 1397: .pr_connect = udp_connect,
1.217 rtr 1398: .pr_connect2 = udp_connect2,
1.212 rtr 1399: .pr_disconnect = udp_disconnect,
1400: .pr_shutdown = udp_shutdown,
1401: .pr_abort = udp_abort,
1.200 rtr 1402: .pr_ioctl = udp_ioctl,
1.203 rtr 1403: .pr_stat = udp_stat,
1.207 rtr 1404: .pr_peeraddr = udp_peeraddr,
1405: .pr_sockaddr = udp_sockaddr,
1.216 rtr 1406: .pr_rcvd = udp_rcvd,
1.209 rtr 1407: .pr_recvoob = udp_recvoob,
1.215 rtr 1408: .pr_send = udp_send,
1.209 rtr 1409: .pr_sendoob = udp_sendoob,
1.217 rtr 1410: .pr_purgeif = udp_purgeif,
1.195 rmind 1411: };
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