Annotation of src/sys/netinet/udp_usrreq.c, Revision 1.234
1.234 ! christos 1: /* $NetBSD: udp_usrreq.c,v 1.233 2017/04/20 08:46:07 ozaki-r 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>
1.234 ! christos 69: __KERNEL_RCSID(0, "$NetBSD: udp_usrreq.c,v 1.233 2017/04/20 08:46:07 ozaki-r Exp $");
1.50 thorpej 70:
1.222 pooka 71: #ifdef _KERNEL_OPT
1.77 soda 72: #include "opt_inet.h"
1.50 thorpej 73: #include "opt_ipsec.h"
1.78 thorpej 74: #include "opt_inet_csum.h"
1.64 ws 75: #include "opt_ipkdb.h"
1.101 martin 76: #include "opt_mbuftrace.h"
1.229 knakahar 77: #include "opt_net_mpsafe.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>
1.1 cgd 92:
1.5 mycroft 93: #include <netinet/in.h>
94: #include <netinet/in_systm.h>
1.15 cgd 95: #include <netinet/in_var.h>
1.5 mycroft 96: #include <netinet/ip.h>
97: #include <netinet/in_pcb.h>
98: #include <netinet/ip_var.h>
99: #include <netinet/ip_icmp.h>
100: #include <netinet/udp.h>
101: #include <netinet/udp_var.h>
1.166 thorpej 102: #include <netinet/udp_private.h>
1.1 cgd 103:
1.53 itojun 104: #ifdef INET6
105: #include <netinet/ip6.h>
106: #include <netinet/icmp6.h>
107: #include <netinet6/ip6_var.h>
1.167 thorpej 108: #include <netinet6/ip6_private.h>
1.53 itojun 109: #include <netinet6/in6_pcb.h>
110: #include <netinet6/udp6_var.h>
1.168 thorpej 111: #include <netinet6/udp6_private.h>
1.53 itojun 112: #endif
113:
114: #ifndef INET6
115: /* always need ip6.h for IP6_EXTHDR_GET */
116: #include <netinet/ip6.h>
117: #endif
118:
1.190 christos 119: #ifdef IPSEC
1.105 jonathan 120: #include <netipsec/ipsec.h>
1.169 thorpej 121: #include <netipsec/ipsec_var.h>
122: #include <netipsec/ipsec_private.h>
1.147 christos 123: #include <netipsec/esp.h>
1.105 jonathan 124: #ifdef INET6
125: #include <netipsec/ipsec6.h>
126: #endif
1.190 christos 127: #endif /* IPSEC */
1.105 jonathan 128:
1.64 ws 129: #ifdef IPKDB
130: #include <ipkdb/ipkdb.h>
131: #endif
132:
1.8 mycroft 133: int udpcksum = 1;
1.141 yamt 134: int udp_do_loopback_cksum = 0;
1.93 matt 135:
136: struct inpcbtable udbtable;
1.164 thorpej 137:
1.166 thorpej 138: percpu_t *udpstat_percpu;
1.8 mycroft 139:
1.72 itojun 140: #ifdef INET
1.190 christos 141: #ifdef IPSEC
1.144 manu 142: static int udp4_espinudp (struct mbuf **, int, struct sockaddr *,
1.130 manu 143: struct socket *);
1.189 christos 144: #endif
1.119 matt 145: static void udp4_sendup (struct mbuf *, int, struct sockaddr *,
146: struct socket *);
147: static int udp4_realinput (struct sockaddr_in *, struct sockaddr_in *,
1.144 manu 148: struct mbuf **, int);
1.129 yamt 149: static int udp4_input_checksum(struct mbuf *, const struct udphdr *, int, int);
1.72 itojun 150: #endif
151: #ifdef INET
1.119 matt 152: static void udp_notify (struct inpcb *, int);
1.72 itojun 153: #endif
1.7 mycroft 154:
1.26 mycroft 155: #ifndef UDBHASHSIZE
156: #define UDBHASHSIZE 128
157: #endif
158: int udbhashsize = UDBHASHSIZE;
159:
1.196 rmind 160: /*
161: * For send - really max datagram size; for receive - 40 1K datagrams.
162: */
163: static int udp_sendspace = 9216;
164: static int udp_recvspace = 40 * (1024 + sizeof(struct sockaddr_in));
165:
1.98 matt 166: #ifdef MBUFTRACE
1.150 dogcow 167: struct mowner udp_mowner = MOWNER_INIT("udp", "");
168: struct mowner udp_rx_mowner = MOWNER_INIT("udp", "rx");
169: struct mowner udp_tx_mowner = MOWNER_INIT("udp", "tx");
1.98 matt 170: #endif
171:
1.78 thorpej 172: #ifdef UDP_CSUM_COUNTERS
173: #include <sys/device.h>
174:
1.140 yamt 175: #if defined(INET)
1.78 thorpej 176: struct evcnt udp_hwcsum_bad = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
177: NULL, "udp", "hwcsum bad");
178: struct evcnt udp_hwcsum_ok = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
179: NULL, "udp", "hwcsum ok");
180: struct evcnt udp_hwcsum_data = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
181: NULL, "udp", "hwcsum data");
182: struct evcnt udp_swcsum = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
183: NULL, "udp", "swcsum");
184:
1.120 matt 185: EVCNT_ATTACH_STATIC(udp_hwcsum_bad);
186: EVCNT_ATTACH_STATIC(udp_hwcsum_ok);
187: EVCNT_ATTACH_STATIC(udp_hwcsum_data);
188: EVCNT_ATTACH_STATIC(udp_swcsum);
1.140 yamt 189: #endif /* defined(INET) */
190:
191: #define UDP_CSUM_COUNTER_INCR(ev) (ev)->ev_count++
1.78 thorpej 192: #else
193: #define UDP_CSUM_COUNTER_INCR(ev) /* nothing */
194: #endif /* UDP_CSUM_COUNTERS */
195:
1.179 pooka 196: static void sysctl_net_inet_udp_setup(struct sysctllog **);
197:
1.192 pooka 198: static int
199: do_udpinit(void)
1.1 cgd 200: {
1.18 mycroft 201:
1.35 mycroft 202: in_pcbinit(&udbtable, udbhashsize, udbhashsize);
1.193 pooka 203: udpstat_percpu = percpu_alloc(sizeof(uint64_t) * UDP_NSTATS);
1.78 thorpej 204:
1.98 matt 205: MOWNER_ATTACH(&udp_tx_mowner);
206: MOWNER_ATTACH(&udp_rx_mowner);
207: MOWNER_ATTACH(&udp_mowner);
1.166 thorpej 208:
1.192 pooka 209: return 0;
210: }
211:
212: void
213: udp_init_common(void)
214: {
215: static ONCE_DECL(doudpinit);
216:
217: RUN_ONCE(&doudpinit, do_udpinit);
218: }
219:
220: void
221: udp_init(void)
222: {
223:
224: sysctl_net_inet_udp_setup(NULL);
225:
226: udp_init_common();
1.1 cgd 227: }
228:
1.129 yamt 229: /*
230: * Checksum extended UDP header and data.
231: */
232:
233: int
234: udp_input_checksum(int af, struct mbuf *m, const struct udphdr *uh,
235: int iphlen, int len)
236: {
237:
238: switch (af) {
1.72 itojun 239: #ifdef INET
1.129 yamt 240: case AF_INET:
241: return udp4_input_checksum(m, uh, iphlen, len);
242: #endif
243: #ifdef INET6
244: case AF_INET6:
245: return udp6_input_checksum(m, uh, iphlen, len);
246: #endif
247: }
248: #ifdef DIAGNOSTIC
249: panic("udp_input_checksum: unknown af %d", af);
250: #endif
251: /* NOTREACHED */
252: return -1;
253: }
254:
255: #ifdef INET
256:
257: /*
258: * Checksum extended UDP header and data.
259: */
260:
261: static int
262: udp4_input_checksum(struct mbuf *m, const struct udphdr *uh,
263: int iphlen, int len)
264: {
265:
266: /*
267: * XXX it's better to record and check if this mbuf is
268: * already checked.
269: */
270:
271: if (uh->uh_sum == 0)
272: return 0;
273:
274: switch (m->m_pkthdr.csum_flags &
1.226 ozaki-r 275: ((m_get_rcvif_NOMPSAFE(m)->if_csum_flags_rx & M_CSUM_UDPv4) |
1.129 yamt 276: M_CSUM_TCP_UDP_BAD | M_CSUM_DATA)) {
277: case M_CSUM_UDPv4|M_CSUM_TCP_UDP_BAD:
278: UDP_CSUM_COUNTER_INCR(&udp_hwcsum_bad);
279: goto badcsum;
280:
281: case M_CSUM_UDPv4|M_CSUM_DATA: {
282: u_int32_t hw_csum = m->m_pkthdr.csum_data;
283:
284: UDP_CSUM_COUNTER_INCR(&udp_hwcsum_data);
285: if (m->m_pkthdr.csum_flags & M_CSUM_NO_PSEUDOHDR) {
286: const struct ip *ip =
287: mtod(m, const struct ip *);
288:
289: hw_csum = in_cksum_phdr(ip->ip_src.s_addr,
290: ip->ip_dst.s_addr,
291: htons(hw_csum + len + IPPROTO_UDP));
292: }
293: if ((hw_csum ^ 0xffff) != 0)
294: goto badcsum;
295: break;
296: }
297:
298: case M_CSUM_UDPv4:
299: /* Checksum was okay. */
300: UDP_CSUM_COUNTER_INCR(&udp_hwcsum_ok);
301: break;
302:
303: default:
304: /*
305: * Need to compute it ourselves. Maybe skip checksum
306: * on loopback interfaces.
307: */
1.226 ozaki-r 308: if (__predict_true(!(m_get_rcvif_NOMPSAFE(m)->if_flags &
1.129 yamt 309: IFF_LOOPBACK) ||
310: udp_do_loopback_cksum)) {
311: UDP_CSUM_COUNTER_INCR(&udp_swcsum);
312: if (in4_cksum(m, IPPROTO_UDP, iphlen, len) != 0)
313: goto badcsum;
314: }
315: break;
316: }
317:
318: return 0;
319:
320: badcsum:
1.166 thorpej 321: UDP_STATINC(UDP_STAT_BADSUM);
1.129 yamt 322: return -1;
323: }
324:
1.7 mycroft 325: void
1.27 christos 326: udp_input(struct mbuf *m, ...)
1.1 cgd 327: {
1.53 itojun 328: va_list ap;
329: struct sockaddr_in src, dst;
330: struct ip *ip;
331: struct udphdr *uh;
1.97 simonb 332: int iphlen;
1.53 itojun 333: int len;
334: int n;
1.96 itojun 335: u_int16_t ip_len;
1.53 itojun 336:
337: va_start(ap, m);
338: iphlen = va_arg(ap, int);
1.97 simonb 339: (void)va_arg(ap, int); /* ignore value, advance ap */
1.53 itojun 340: va_end(ap);
341:
1.98 matt 342: MCLAIM(m, &udp_rx_mowner);
1.166 thorpej 343: UDP_STATINC(UDP_STAT_IPACKETS);
1.53 itojun 344:
345: /*
346: * Get IP and UDP header together in first mbuf.
347: */
348: ip = mtod(m, struct ip *);
349: IP6_EXTHDR_GET(uh, struct udphdr *, m, iphlen, sizeof(struct udphdr));
350: if (uh == NULL) {
1.166 thorpej 351: UDP_STATINC(UDP_STAT_HDROPS);
1.53 itojun 352: return;
353: }
1.228 mlelstv 354: /*
355: * Enforce alignment requirements that are violated in
356: * some cases, see kern/50766 for details.
357: */
358: if (UDP_HDR_ALIGNED_P(uh) == 0) {
359: m = m_copyup(m, iphlen + sizeof(struct udphdr), 0);
360: if (m == NULL) {
361: UDP_STATINC(UDP_STAT_HDROPS);
362: return;
363: }
364: ip = mtod(m, struct ip *);
365: uh = (struct udphdr *)(mtod(m, char *) + iphlen);
366: }
1.95 thorpej 367: KASSERT(UDP_HDR_ALIGNED_P(uh));
1.53 itojun 368:
1.57 itojun 369: /* destination port of 0 is illegal, based on RFC768. */
370: if (uh->uh_dport == 0)
371: goto bad;
372:
1.53 itojun 373: /*
374: * Make mbuf data length reflect UDP length.
375: * If not enough data to reflect UDP length, drop.
376: */
1.96 itojun 377: ip_len = ntohs(ip->ip_len);
1.53 itojun 378: len = ntohs((u_int16_t)uh->uh_ulen);
1.96 itojun 379: if (ip_len != iphlen + len) {
380: if (ip_len < iphlen + len || len < sizeof(struct udphdr)) {
1.166 thorpej 381: UDP_STATINC(UDP_STAT_BADLEN);
1.53 itojun 382: goto bad;
383: }
1.96 itojun 384: m_adj(m, iphlen + len - ip_len);
1.53 itojun 385: }
386:
387: /*
388: * Checksum extended UDP header and data.
389: */
1.129 yamt 390: if (udp4_input_checksum(m, uh, iphlen, len))
391: goto badcsum;
1.53 itojun 392:
393: /* construct source and dst sockaddrs. */
1.159 dyoung 394: sockaddr_in_init(&src, &ip->ip_src, uh->uh_sport);
395: sockaddr_in_init(&dst, &ip->ip_dst, uh->uh_dport);
1.53 itojun 396:
1.144 manu 397: if ((n = udp4_realinput(&src, &dst, &m, iphlen)) == -1) {
1.166 thorpej 398: UDP_STATINC(UDP_STAT_HDROPS);
1.144 manu 399: return;
400: }
1.188 christos 401: if (m == NULL) {
402: /*
403: * packet has been processed by ESP stuff -
404: * e.g. dropped NAT-T-keep-alive-packet ...
405: */
406: return;
407: }
408: ip = mtod(m, struct ip *);
1.53 itojun 409: #ifdef INET6
410: if (IN_MULTICAST(ip->ip_dst.s_addr) || n == 0) {
411: struct sockaddr_in6 src6, dst6;
412:
1.175 cegger 413: memset(&src6, 0, sizeof(src6));
1.53 itojun 414: src6.sin6_family = AF_INET6;
415: src6.sin6_len = sizeof(struct sockaddr_in6);
1.224 rtr 416: in6_in_2_v4mapin6(&ip->ip_src, &src6.sin6_addr);
1.53 itojun 417: src6.sin6_port = uh->uh_sport;
1.175 cegger 418: memset(&dst6, 0, sizeof(dst6));
1.53 itojun 419: dst6.sin6_family = AF_INET6;
420: dst6.sin6_len = sizeof(struct sockaddr_in6);
1.224 rtr 421: in6_in_2_v4mapin6(&ip->ip_dst, &dst6.sin6_addr);
1.53 itojun 422: dst6.sin6_port = uh->uh_dport;
423:
424: n += udp6_realinput(AF_INET, &src6, &dst6, m, iphlen);
425: }
426: #endif
427:
428: if (n == 0) {
429: if (m->m_flags & (M_BCAST | M_MCAST)) {
1.166 thorpej 430: UDP_STATINC(UDP_STAT_NOPORTBCAST);
1.53 itojun 431: goto bad;
432: }
1.166 thorpej 433: UDP_STATINC(UDP_STAT_NOPORT);
1.64 ws 434: #ifdef IPKDB
1.53 itojun 435: if (checkipkdb(&ip->ip_src, uh->uh_sport, uh->uh_dport,
436: m, iphlen + sizeof(struct udphdr),
437: m->m_pkthdr.len - iphlen - sizeof(struct udphdr))) {
438: /*
439: * It was a debugger connect packet,
440: * just drop it now
441: */
442: goto bad;
443: }
444: #endif
445: icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0);
446: m = NULL;
447: }
448:
449: bad:
450: if (m)
451: m_freem(m);
1.78 thorpej 452: return;
453:
454: badcsum:
455: m_freem(m);
1.53 itojun 456: }
1.72 itojun 457: #endif
1.53 itojun 458:
1.72 itojun 459: #ifdef INET
1.53 itojun 460: static void
1.119 matt 461: udp4_sendup(struct mbuf *m, int off /* offset of data portion */,
462: struct sockaddr *src, struct socket *so)
1.53 itojun 463: {
464: struct mbuf *opts = NULL;
465: struct mbuf *n;
1.232 ozaki-r 466: struct inpcb *inp;
1.53 itojun 467:
1.233 ozaki-r 468: KASSERT(so != NULL);
1.232 ozaki-r 469: KASSERT(so->so_proto->pr_domain->dom_family == AF_INET);
470: inp = sotoinpcb(so);
471: KASSERT(inp != NULL);
1.53 itojun 472:
1.190 christos 473: #if defined(IPSEC)
1.53 itojun 474: /* check AH/ESP integrity. */
1.233 ozaki-r 475: if (ipsec_used && ipsec4_in_reject(m, inp)) {
1.169 thorpej 476: IPSEC_STATINC(IPSEC_STAT_IN_POLVIO);
1.162 dyoung 477: if ((n = m_copypacket(m, M_DONTWAIT)) != NULL)
1.110 itojun 478: icmp_error(n, ICMP_UNREACH, ICMP_UNREACH_ADMIN_PROHIBIT,
479: 0, 0);
1.53 itojun 480: return;
481: }
482: #endif /*IPSEC*/
483:
1.162 dyoung 484: if ((n = m_copypacket(m, M_DONTWAIT)) != NULL) {
1.232 ozaki-r 485: if (inp->inp_flags & INP_CONTROLOPTS
1.234 ! christos 486: || SOOPT_TIMESTAMP(so->so_options)) {
1.53 itojun 487: struct ip *ip = mtod(n, struct ip *);
488: ip_savecontrol(inp, &opts, ip, n);
489: }
490:
491: m_adj(n, off);
492: if (sbappendaddr(&so->so_rcv, src, n,
493: opts) == 0) {
494: m_freem(n);
495: if (opts)
496: m_freem(opts);
1.124 darrenr 497: so->so_rcv.sb_overflowed++;
1.166 thorpej 498: UDP_STATINC(UDP_STAT_FULLSOCK);
1.53 itojun 499: } else
500: sorwakeup(so);
501: }
502: }
1.72 itojun 503: #endif
1.53 itojun 504:
1.72 itojun 505: #ifdef INET
1.53 itojun 506: static int
1.119 matt 507: udp4_realinput(struct sockaddr_in *src, struct sockaddr_in *dst,
1.144 manu 508: struct mbuf **mp, int off /* offset of udphdr */)
1.53 itojun 509: {
510: u_int16_t *sport, *dport;
511: int rcvcnt;
512: struct in_addr *src4, *dst4;
1.109 itojun 513: struct inpcb_hdr *inph;
1.53 itojun 514: struct inpcb *inp;
1.144 manu 515: struct mbuf *m = *mp;
1.53 itojun 516:
517: rcvcnt = 0;
518: off += sizeof(struct udphdr); /* now, offset of payload */
519:
520: if (src->sin_family != AF_INET || dst->sin_family != AF_INET)
521: goto bad;
522:
523: src4 = &src->sin_addr;
524: sport = &src->sin_port;
525: dst4 = &dst->sin_addr;
526: dport = &dst->sin_port;
527:
1.73 itojun 528: if (IN_MULTICAST(dst4->s_addr) ||
1.226 ozaki-r 529: in_broadcast(*dst4, m_get_rcvif_NOMPSAFE(m))) {
1.53 itojun 530: /*
531: * Deliver a multicast or broadcast datagram to *all* sockets
532: * for which the local and remote addresses and ports match
533: * those of the incoming datagram. This allows more than
534: * one process to receive multi/broadcasts on the same port.
535: * (This really ought to be done for unicast datagrams as
536: * well, but that would cause problems with existing
537: * applications that open both address-specific sockets and
538: * a wildcard socket listening to the same port -- they would
539: * end up receiving duplicates of every unicast datagram.
540: * Those applications open the multiple sockets to overcome an
541: * inadequacy of the UDP socket interface, but for backwards
542: * compatibility we avoid the problem here rather than
543: * fixing the interface. Maybe 4.5BSD will remedy this?)
544: */
545:
546: /*
1.92 itojun 547: * KAME note: traditionally we dropped udpiphdr from mbuf here.
1.71 itojun 548: * we need udpiphdr for IPsec processing so we do that later.
1.53 itojun 549: */
550: /*
551: * Locate pcb(s) for datagram.
552: */
1.191 christos 553: TAILQ_FOREACH(inph, &udbtable.inpt_queue, inph_queue) {
1.109 itojun 554: inp = (struct inpcb *)inph;
555: if (inp->inp_af != AF_INET)
556: continue;
557:
1.53 itojun 558: if (inp->inp_lport != *dport)
559: continue;
560: if (!in_nullhost(inp->inp_laddr)) {
561: if (!in_hosteq(inp->inp_laddr, *dst4))
562: continue;
563: }
564: if (!in_nullhost(inp->inp_faddr)) {
565: if (!in_hosteq(inp->inp_faddr, *src4) ||
566: inp->inp_fport != *sport)
567: continue;
568: }
569:
570: udp4_sendup(m, off, (struct sockaddr *)src,
571: inp->inp_socket);
572: rcvcnt++;
573:
574: /*
575: * Don't look for additional matches if this one does
576: * not have either the SO_REUSEPORT or SO_REUSEADDR
577: * socket options set. This heuristic avoids searching
578: * through all pcbs in the common case of a non-shared
579: * port. It assumes that an application will never
580: * clear these options after setting them.
581: */
582: if ((inp->inp_socket->so_options &
583: (SO_REUSEPORT|SO_REUSEADDR)) == 0)
584: break;
585: }
586: } else {
587: /*
588: * Locate pcb for datagram.
589: */
1.180 dyoung 590: inp = in_pcblookup_connect(&udbtable, *src4, *sport, *dst4,
591: *dport, 0);
1.53 itojun 592: if (inp == 0) {
1.166 thorpej 593: UDP_STATINC(UDP_STAT_PCBHASHMISS);
1.53 itojun 594: inp = in_pcblookup_bind(&udbtable, *dst4, *dport);
1.82 itojun 595: if (inp == 0)
1.53 itojun 596: return rcvcnt;
597: }
598:
1.190 christos 599: #ifdef IPSEC
1.130 manu 600: /* Handle ESP over UDP */
601: if (inp->inp_flags & INP_ESPINUDP_ALL) {
602: struct sockaddr *sa = (struct sockaddr *)src;
603:
1.144 manu 604: switch(udp4_espinudp(mp, off, sa, inp->inp_socket)) {
605: case -1: /* Error, m was freeed */
606: rcvcnt = -1;
607: goto bad;
608: break;
609:
610: case 1: /* ESP over UDP */
1.130 manu 611: rcvcnt++;
612: goto bad;
1.144 manu 613: break;
614:
615: case 0: /* plain UDP */
616: default: /* Unexpected */
617: /*
618: * Normal UDP processing will take place
619: * m may have changed.
620: */
621: m = *mp;
622: break;
1.130 manu 623: }
624: }
1.189 christos 625: #endif
1.130 manu 626:
1.178 minskim 627: /*
628: * Check the minimum TTL for socket.
629: */
630: if (mtod(m, struct ip *)->ip_ttl < inp->inp_ip_minttl)
631: goto bad;
632:
1.53 itojun 633: udp4_sendup(m, off, (struct sockaddr *)src, inp->inp_socket);
634: rcvcnt++;
635: }
636:
637: bad:
638: return rcvcnt;
639: }
1.72 itojun 640: #endif
1.53 itojun 641:
1.72 itojun 642: #ifdef INET
1.1 cgd 643: /*
644: * Notify a udp user of an asynchronous error;
645: * just wake up so that he can collect error status.
646: */
1.7 mycroft 647: static void
1.119 matt 648: udp_notify(struct inpcb *inp, int errno)
1.1 cgd 649: {
650: inp->inp_socket->so_error = errno;
651: sorwakeup(inp->inp_socket);
652: sowwakeup(inp->inp_socket);
653: }
654:
1.27 christos 655: void *
1.157 dyoung 656: udp_ctlinput(int cmd, const struct sockaddr *sa, void *v)
1.1 cgd 657: {
1.66 augustss 658: struct ip *ip = v;
659: struct udphdr *uh;
1.119 matt 660: void (*notify)(struct inpcb *, int) = udp_notify;
1.21 mycroft 661: int errno;
1.1 cgd 662:
1.53 itojun 663: if (sa->sa_family != AF_INET
664: || sa->sa_len != sizeof(struct sockaddr_in))
1.51 itojun 665: return NULL;
1.20 mycroft 666: if ((unsigned)cmd >= PRC_NCMDS)
1.27 christos 667: return NULL;
1.20 mycroft 668: errno = inetctlerrmap[cmd];
1.18 mycroft 669: if (PRC_IS_REDIRECT(cmd))
1.19 mycroft 670: notify = in_rtchange, ip = 0;
1.18 mycroft 671: else if (cmd == PRC_HOSTDEAD)
1.19 mycroft 672: ip = 0;
1.23 cgd 673: else if (errno == 0)
1.27 christos 674: return NULL;
1.19 mycroft 675: if (ip) {
1.158 christos 676: uh = (struct udphdr *)((char *)ip + (ip->ip_hl << 2));
1.157 dyoung 677: in_pcbnotify(&udbtable, satocsin(sa)->sin_addr, uh->uh_dport,
1.34 mycroft 678: ip->ip_src, uh->uh_sport, errno, notify);
1.53 itojun 679:
680: /* XXX mapped address case */
1.19 mycroft 681: } else
1.157 dyoung 682: in_pcbnotifyall(&udbtable, satocsin(sa)->sin_addr, errno,
1.34 mycroft 683: notify);
1.27 christos 684: return NULL;
1.1 cgd 685: }
686:
1.7 mycroft 687: int
1.173 plunky 688: udp_ctloutput(int op, struct socket *so, struct sockopt *sopt)
1.130 manu 689: {
690: int s;
691: int error = 0;
692: struct inpcb *inp;
693: int family;
1.173 plunky 694: int optval;
1.130 manu 695:
696: family = so->so_proto->pr_domain->dom_family;
697:
698: s = splsoftnet();
699: switch (family) {
700: #ifdef INET
701: case PF_INET:
1.173 plunky 702: if (sopt->sopt_level != IPPROTO_UDP) {
703: error = ip_ctloutput(op, so, sopt);
1.130 manu 704: goto end;
705: }
706: break;
707: #endif
708: #ifdef INET6
709: case PF_INET6:
1.173 plunky 710: if (sopt->sopt_level != IPPROTO_UDP) {
711: error = ip6_ctloutput(op, so, sopt);
1.130 manu 712: goto end;
713: }
714: break;
715: #endif
716: default:
717: error = EAFNOSUPPORT;
718: goto end;
719: }
720:
721:
722: switch (op) {
723: case PRCO_SETOPT:
724: inp = sotoinpcb(so);
725:
1.173 plunky 726: switch (sopt->sopt_name) {
1.130 manu 727: case UDP_ENCAP:
1.173 plunky 728: error = sockopt_getint(sopt, &optval);
729: if (error)
1.153 yamt 730: break;
1.131 perry 731:
1.173 plunky 732: switch(optval) {
1.130 manu 733: case 0:
734: inp->inp_flags &= ~INP_ESPINUDP_ALL;
735: break;
736:
737: case UDP_ENCAP_ESPINUDP:
738: inp->inp_flags &= ~INP_ESPINUDP_ALL;
739: inp->inp_flags |= INP_ESPINUDP;
740: break;
1.131 perry 741:
1.130 manu 742: case UDP_ENCAP_ESPINUDP_NON_IKE:
743: inp->inp_flags &= ~INP_ESPINUDP_ALL;
744: inp->inp_flags |= INP_ESPINUDP_NON_IKE;
745: break;
746: default:
747: error = EINVAL;
748: break;
749: }
750: break;
1.183 christos 751:
1.130 manu 752: default:
753: error = ENOPROTOOPT;
754: break;
755: }
756: break;
757:
758: default:
759: error = EINVAL;
760: break;
1.131 perry 761: }
762:
1.130 manu 763: end:
764: splx(s);
765: return error;
766: }
1.131 perry 767:
1.130 manu 768:
769: int
1.223 riastrad 770: udp_output(struct mbuf *m, struct inpcb *inp)
1.27 christos 771: {
1.66 augustss 772: struct udpiphdr *ui;
1.125 thorpej 773: struct route *ro;
1.66 augustss 774: int len = m->m_pkthdr.len;
1.31 mycroft 775: int error = 0;
1.27 christos 776:
1.98 matt 777: MCLAIM(m, &udp_tx_mowner);
1.1 cgd 778:
779: /*
780: * Calculate data length and get a mbuf
781: * for UDP and IP headers.
782: */
1.13 mycroft 783: M_PREPEND(m, sizeof(struct udpiphdr), M_DONTWAIT);
784: if (m == 0) {
785: error = ENOBUFS;
1.39 thorpej 786: goto release;
787: }
788:
789: /*
790: * Compute the packet length of the IP header, and
791: * punt if the length looks bogus.
792: */
1.96 itojun 793: if (len + sizeof(struct udpiphdr) > IP_MAXPACKET) {
1.39 thorpej 794: error = EMSGSIZE;
1.13 mycroft 795: goto release;
796: }
1.1 cgd 797:
798: /*
799: * Fill in mbuf with extended UDP header
800: * and addresses and length put into network format.
801: */
802: ui = mtod(m, struct udpiphdr *);
803: ui->ui_pr = IPPROTO_UDP;
804: ui->ui_src = inp->inp_laddr;
805: ui->ui_dst = inp->inp_faddr;
806: ui->ui_sport = inp->inp_lport;
807: ui->ui_dport = inp->inp_fport;
1.78 thorpej 808: ui->ui_ulen = htons((u_int16_t)len + sizeof(struct udphdr));
1.1 cgd 809:
1.125 thorpej 810: ro = &inp->inp_route;
811:
1.1 cgd 812: /*
1.78 thorpej 813: * Set up checksum and output datagram.
1.1 cgd 814: */
815: if (udpcksum) {
1.78 thorpej 816: /*
817: * XXX Cache pseudo-header checksum part for
818: * XXX "connected" UDP sockets.
819: */
820: ui->ui_sum = in_cksum_phdr(ui->ui_src.s_addr,
821: ui->ui_dst.s_addr, htons((u_int16_t)len +
822: sizeof(struct udphdr) + IPPROTO_UDP));
1.135 yamt 823: m->m_pkthdr.csum_flags = M_CSUM_UDPv4;
1.78 thorpej 824: m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum);
825: } else
826: ui->ui_sum = 0;
1.96 itojun 827: ((struct ip *)ui)->ip_len = htons(sizeof (struct udpiphdr) + len);
1.1 cgd 828: ((struct ip *)ui)->ip_ttl = inp->inp_ip.ip_ttl; /* XXX */
829: ((struct ip *)ui)->ip_tos = inp->inp_ip.ip_tos; /* XXX */
1.166 thorpej 830: UDP_STATINC(UDP_STAT_OPACKETS);
1.48 itojun 831:
1.125 thorpej 832: return (ip_output(m, inp->inp_options, ro,
1.12 mycroft 833: inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST),
1.231 ozaki-r 834: inp->inp_moptions, inp));
1.1 cgd 835:
836: release:
837: m_freem(m);
838: return (error);
839: }
840:
1.196 rmind 841: static int
842: udp_attach(struct socket *so, int proto)
843: {
844: struct inpcb *inp;
845: int error;
846:
847: KASSERT(sotoinpcb(so) == NULL);
848:
849: /* Assign the lock (must happen even if we will error out). */
850: sosetlock(so);
851:
852: #ifdef MBUFTRACE
853: so->so_mowner = &udp_mowner;
854: so->so_rcv.sb_mowner = &udp_rx_mowner;
855: so->so_snd.sb_mowner = &udp_tx_mowner;
856: #endif
857: if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
858: error = soreserve(so, udp_sendspace, udp_recvspace);
859: if (error) {
860: return error;
861: }
862: }
863:
864: error = in_pcballoc(so, &udbtable);
865: if (error) {
866: return error;
867: }
868: inp = sotoinpcb(so);
869: inp->inp_ip.ip_ttl = ip_defttl;
870: KASSERT(solocked(so));
871:
872: return error;
873: }
874:
875: static void
876: udp_detach(struct socket *so)
877: {
878: struct inpcb *inp;
879:
880: KASSERT(solocked(so));
881: inp = sotoinpcb(so);
882: KASSERT(inp != NULL);
883: in_pcbdetach(inp);
884: }
1.1 cgd 885:
1.195 rmind 886: static int
1.219 rtr 887: udp_accept(struct socket *so, struct sockaddr *nam)
1.208 rtr 888: {
889: KASSERT(solocked(so));
890:
891: panic("udp_accept");
1.210 rtr 892:
1.208 rtr 893: return EOPNOTSUPP;
894: }
895:
896: static int
1.218 rtr 897: udp_bind(struct socket *so, struct sockaddr *nam, struct lwp *l)
1.210 rtr 898: {
899: struct inpcb *inp = sotoinpcb(so);
1.218 rtr 900: struct sockaddr_in *sin = (struct sockaddr_in *)nam;
1.210 rtr 901: int error = 0;
902: int s;
903:
904: KASSERT(solocked(so));
905: KASSERT(inp != NULL);
906: KASSERT(nam != NULL);
907:
908: s = splsoftnet();
1.218 rtr 909: error = in_pcbbind(inp, sin, l);
1.210 rtr 910: splx(s);
911:
912: return error;
913: }
914:
915: static int
1.214 rtr 916: udp_listen(struct socket *so, struct lwp *l)
1.210 rtr 917: {
918: KASSERT(solocked(so));
919:
920: return EOPNOTSUPP;
921: }
922:
1.211 rtr 923: static int
1.221 rtr 924: udp_connect(struct socket *so, struct sockaddr *nam, struct lwp *l)
1.211 rtr 925: {
926: struct inpcb *inp = sotoinpcb(so);
927: int error = 0;
928: int s;
929:
930: KASSERT(solocked(so));
931: KASSERT(inp != NULL);
932: KASSERT(nam != NULL);
933:
934: s = splsoftnet();
1.221 rtr 935: error = in_pcbconnect(inp, (struct sockaddr_in *)nam, l);
1.211 rtr 936: if (! error)
937: soisconnected(so);
938: splx(s);
939: return error;
940: }
1.210 rtr 941:
942: static int
1.217 rtr 943: udp_connect2(struct socket *so, struct socket *so2)
944: {
945: KASSERT(solocked(so));
946:
947: return EOPNOTSUPP;
948: }
949:
950: static int
1.212 rtr 951: udp_disconnect(struct socket *so)
952: {
953: struct inpcb *inp = sotoinpcb(so);
954: int s;
955:
956: KASSERT(solocked(so));
957: KASSERT(inp != NULL);
958:
959: s = splsoftnet();
960: /*soisdisconnected(so);*/
961: so->so_state &= ~SS_ISCONNECTED; /* XXX */
962: in_pcbdisconnect(inp);
963: inp->inp_laddr = zeroin_addr; /* XXX */
964: in_pcbstate(inp, INP_BOUND); /* XXX */
965: splx(s);
966:
967: return 0;
968: }
969:
970: static int
971: udp_shutdown(struct socket *so)
972: {
973: int s;
974:
975: KASSERT(solocked(so));
976:
977: s = splsoftnet();
978: socantsendmore(so);
979: splx(s);
980:
981: return 0;
982: }
983:
984: static int
985: udp_abort(struct socket *so)
986: {
987: KASSERT(solocked(so));
988:
989: panic("udp_abort");
990:
991: return EOPNOTSUPP;
992: }
993:
994: static int
1.202 rtr 995: udp_ioctl(struct socket *so, u_long cmd, void *nam, struct ifnet *ifp)
1.200 rtr 996: {
1.202 rtr 997: return in_control(so, cmd, nam, ifp);
1.200 rtr 998: }
999:
1000: static int
1.203 rtr 1001: udp_stat(struct socket *so, struct stat *ub)
1002: {
1.206 rtr 1003: KASSERT(solocked(so));
1004:
1.205 rtr 1005: /* stat: don't bother with a blocksize. */
1006: return 0;
1.203 rtr 1007: }
1008:
1009: static int
1.219 rtr 1010: udp_peeraddr(struct socket *so, struct sockaddr *nam)
1.207 rtr 1011: {
1.213 rtr 1012: int s;
1013:
1.207 rtr 1014: KASSERT(solocked(so));
1015: KASSERT(sotoinpcb(so) != NULL);
1016: KASSERT(nam != NULL);
1017:
1.213 rtr 1018: s = splsoftnet();
1.219 rtr 1019: in_setpeeraddr(sotoinpcb(so), (struct sockaddr_in *)nam);
1.213 rtr 1020: splx(s);
1021:
1.207 rtr 1022: return 0;
1023: }
1024:
1025: static int
1.219 rtr 1026: udp_sockaddr(struct socket *so, struct sockaddr *nam)
1.207 rtr 1027: {
1.213 rtr 1028: int s;
1029:
1.207 rtr 1030: KASSERT(solocked(so));
1031: KASSERT(sotoinpcb(so) != NULL);
1032: KASSERT(nam != NULL);
1033:
1.213 rtr 1034: s = splsoftnet();
1.219 rtr 1035: in_setsockaddr(sotoinpcb(so), (struct sockaddr_in *)nam);
1.213 rtr 1036: splx(s);
1037:
1.207 rtr 1038: return 0;
1039: }
1040:
1041: static int
1.216 rtr 1042: udp_rcvd(struct socket *so, int flags, struct lwp *l)
1043: {
1044: KASSERT(solocked(so));
1045:
1046: return EOPNOTSUPP;
1047: }
1048:
1049: static int
1.209 rtr 1050: udp_recvoob(struct socket *so, struct mbuf *m, int flags)
1051: {
1052: KASSERT(solocked(so));
1053:
1054: return EOPNOTSUPP;
1055: }
1056:
1057: static int
1.221 rtr 1058: udp_send(struct socket *so, struct mbuf *m, struct sockaddr *nam,
1.215 rtr 1059: struct mbuf *control, struct lwp *l)
1060: {
1061: struct inpcb *inp = sotoinpcb(so);
1062: int error = 0;
1063: struct in_addr laddr; /* XXX */
1064: int s;
1065:
1066: KASSERT(solocked(so));
1067: KASSERT(inp != NULL);
1068: KASSERT(m != NULL);
1069:
1070: if (control && control->m_len) {
1071: m_freem(control);
1072: m_freem(m);
1073: return EINVAL;
1074: }
1075:
1076: memset(&laddr, 0, sizeof laddr);
1077:
1078: s = splsoftnet();
1079: if (nam) {
1080: laddr = inp->inp_laddr; /* XXX */
1081: if ((so->so_state & SS_ISCONNECTED) != 0) {
1082: error = EISCONN;
1083: goto die;
1084: }
1.221 rtr 1085: error = in_pcbconnect(inp, (struct sockaddr_in *)nam, l);
1.215 rtr 1086: if (error)
1087: goto die;
1088: } else {
1089: if ((so->so_state & SS_ISCONNECTED) == 0) {
1090: error = ENOTCONN;
1091: goto die;
1092: }
1093: }
1094: error = udp_output(m, inp);
1095: m = NULL;
1096: if (nam) {
1097: in_pcbdisconnect(inp);
1098: inp->inp_laddr = laddr; /* XXX */
1099: in_pcbstate(inp, INP_BOUND); /* XXX */
1100: }
1101: die:
1102: if (m)
1103: m_freem(m);
1104:
1105: splx(s);
1106: return error;
1107: }
1108:
1109: static int
1.209 rtr 1110: udp_sendoob(struct socket *so, struct mbuf *m, struct mbuf *control)
1111: {
1112: KASSERT(solocked(so));
1113:
1114: m_freem(m);
1115: m_freem(control);
1116:
1117: return EOPNOTSUPP;
1118: }
1119:
1120: static int
1.217 rtr 1121: udp_purgeif(struct socket *so, struct ifnet *ifp)
1122: {
1123: int s;
1124:
1125: s = splsoftnet();
1126: mutex_enter(softnet_lock);
1.230 ozaki-r 1127: in_pcbpurgeif0(&udbtable, ifp);
1128: #ifdef NET_MPSAFE
1129: mutex_exit(softnet_lock);
1.229 knakahar 1130: #endif
1.217 rtr 1131: in_purgeif(ifp);
1.230 ozaki-r 1132: #ifdef NET_MPSAFE
1133: mutex_enter(softnet_lock);
1134: #endif
1.217 rtr 1135: in_pcbpurgeif(&udbtable, ifp);
1136: mutex_exit(softnet_lock);
1137: splx(s);
1138:
1139: return 0;
1140: }
1141:
1142: static int
1.166 thorpej 1143: sysctl_net_inet_udp_stats(SYSCTLFN_ARGS)
1144: {
1145:
1.172 thorpej 1146: return (NETSTAT_SYSCTL(udpstat_percpu, UDP_NSTATS));
1.166 thorpej 1147: }
1148:
1.13 mycroft 1149: /*
1150: * Sysctl for udp variables.
1151: */
1.179 pooka 1152: static void
1153: sysctl_net_inet_udp_setup(struct sysctllog **clog)
1.13 mycroft 1154: {
1.194 pooka 1155:
1.116 atatat 1156: sysctl_createv(clog, 0, NULL, NULL,
1157: CTLFLAG_PERMANENT,
1.114 atatat 1158: CTLTYPE_NODE, "inet", NULL,
1159: NULL, 0, NULL, 0,
1160: CTL_NET, PF_INET, CTL_EOL);
1.116 atatat 1161: sysctl_createv(clog, 0, NULL, NULL,
1162: CTLFLAG_PERMANENT,
1.122 atatat 1163: CTLTYPE_NODE, "udp",
1164: SYSCTL_DESCR("UDPv4 related settings"),
1.114 atatat 1165: NULL, 0, NULL, 0,
1166: CTL_NET, PF_INET, IPPROTO_UDP, CTL_EOL);
1167:
1.116 atatat 1168: sysctl_createv(clog, 0, NULL, NULL,
1169: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.122 atatat 1170: CTLTYPE_INT, "checksum",
1.123 heas 1171: SYSCTL_DESCR("Compute UDP checksums"),
1.114 atatat 1172: NULL, 0, &udpcksum, 0,
1173: CTL_NET, PF_INET, IPPROTO_UDP, UDPCTL_CHECKSUM,
1174: CTL_EOL);
1.116 atatat 1175: sysctl_createv(clog, 0, NULL, NULL,
1176: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.122 atatat 1177: CTLTYPE_INT, "sendspace",
1178: SYSCTL_DESCR("Default UDP send buffer size"),
1.114 atatat 1179: NULL, 0, &udp_sendspace, 0,
1180: CTL_NET, PF_INET, IPPROTO_UDP, UDPCTL_SENDSPACE,
1181: CTL_EOL);
1.116 atatat 1182: sysctl_createv(clog, 0, NULL, NULL,
1183: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.122 atatat 1184: CTLTYPE_INT, "recvspace",
1185: SYSCTL_DESCR("Default UDP receive buffer size"),
1.114 atatat 1186: NULL, 0, &udp_recvspace, 0,
1187: CTL_NET, PF_INET, IPPROTO_UDP, UDPCTL_RECVSPACE,
1188: CTL_EOL);
1.125 thorpej 1189: sysctl_createv(clog, 0, NULL, NULL,
1190: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1191: CTLTYPE_INT, "do_loopback_cksum",
1192: SYSCTL_DESCR("Perform UDP checksum on loopback"),
1193: NULL, 0, &udp_do_loopback_cksum, 0,
1194: CTL_NET, PF_INET, IPPROTO_UDP, UDPCTL_LOOPBACKCKSUM,
1195: CTL_EOL);
1.132 atatat 1196: sysctl_createv(clog, 0, NULL, NULL,
1197: CTLFLAG_PERMANENT,
1.134 atatat 1198: CTLTYPE_STRUCT, "pcblist",
1.132 atatat 1199: SYSCTL_DESCR("UDP protocol control block list"),
1200: sysctl_inpcblist, 0, &udbtable, 0,
1201: CTL_NET, PF_INET, IPPROTO_UDP, CTL_CREATE,
1202: CTL_EOL);
1.139 elad 1203: sysctl_createv(clog, 0, NULL, NULL,
1204: CTLFLAG_PERMANENT,
1205: CTLTYPE_STRUCT, "stats",
1206: SYSCTL_DESCR("UDP statistics"),
1.166 thorpej 1207: sysctl_net_inet_udp_stats, 0, NULL, 0,
1.139 elad 1208: CTL_NET, PF_INET, IPPROTO_UDP, UDPCTL_STATS,
1209: CTL_EOL);
1.1 cgd 1210: }
1.72 itojun 1211: #endif
1.130 manu 1212:
1.166 thorpej 1213: void
1214: udp_statinc(u_int stat)
1215: {
1216:
1217: KASSERT(stat < UDP_NSTATS);
1218: UDP_STATINC(stat);
1219: }
1220:
1.190 christos 1221: #if defined(INET) && defined(IPSEC)
1.130 manu 1222: /*
1223: * Returns:
1224: * 1 if the packet was processed
1225: * 0 if normal UDP processing should take place
1.144 manu 1226: * -1 if an error occurent and m was freed
1.130 manu 1227: */
1228: static int
1.154 yamt 1229: udp4_espinudp(struct mbuf **mp, int off, struct sockaddr *src,
1.151 christos 1230: struct socket *so)
1.130 manu 1231: {
1232: size_t len;
1.158 christos 1233: void *data;
1.130 manu 1234: struct inpcb *inp;
1235: size_t skip = 0;
1236: size_t minlen;
1237: size_t iphdrlen;
1238: struct ip *ip;
1.136 manu 1239: struct m_tag *tag;
1240: struct udphdr *udphdr;
1241: u_int16_t sport, dport;
1.144 manu 1242: struct mbuf *m = *mp;
1.130 manu 1243:
1.131 perry 1244: /*
1.130 manu 1245: * Collapse the mbuf chain if the first mbuf is too short
1246: * The longest case is: UDP + non ESP marker + ESP
1247: */
1248: minlen = off + sizeof(u_int64_t) + sizeof(struct esp);
1249: if (minlen > m->m_pkthdr.len)
1250: minlen = m->m_pkthdr.len;
1251:
1252: if (m->m_len < minlen) {
1.144 manu 1253: if ((*mp = m_pullup(m, minlen)) == NULL) {
1.130 manu 1254: printf("udp4_espinudp: m_pullup failed\n");
1.144 manu 1255: return -1;
1.130 manu 1256: }
1.144 manu 1257: m = *mp;
1.130 manu 1258: }
1259:
1.131 perry 1260: len = m->m_len - off;
1.158 christos 1261: data = mtod(m, char *) + off;
1.130 manu 1262: inp = sotoinpcb(so);
1263:
1264: /* Ignore keepalive packets */
1.158 christos 1265: if ((len == 1) && (*(unsigned char *)data == 0xff)) {
1.188 christos 1266: m_free(m);
1267: *mp = NULL; /* avoid any further processiong by caller ... */
1.130 manu 1268: return 1;
1269: }
1270:
1.131 perry 1271: /*
1272: * Check that the payload is long enough to hold
1.130 manu 1273: * an ESP header and compute the length of encapsulation
1.131 perry 1274: * header to remove
1.130 manu 1275: */
1276: if (inp->inp_flags & INP_ESPINUDP) {
1277: u_int32_t *st = (u_int32_t *)data;
1278:
1279: if ((len <= sizeof(struct esp)) || (*st == 0))
1280: return 0; /* Normal UDP processing */
1281:
1282: skip = sizeof(struct udphdr);
1283: }
1284:
1285: if (inp->inp_flags & INP_ESPINUDP_NON_IKE) {
1.142 kleink 1286: u_int32_t *st = (u_int32_t *)data;
1.130 manu 1287:
1288: if ((len <= sizeof(u_int64_t) + sizeof(struct esp))
1.142 kleink 1289: || ((st[0] | st[1]) != 0))
1.130 manu 1290: return 0; /* Normal UDP processing */
1.131 perry 1291:
1.130 manu 1292: skip = sizeof(struct udphdr) + sizeof(u_int64_t);
1293: }
1294:
1295: /*
1.136 manu 1296: * Get the UDP ports. They are handled in network
1297: * order everywhere in IPSEC_NAT_T code.
1298: */
1.158 christos 1299: udphdr = (struct udphdr *)((char *)data - skip);
1.136 manu 1300: sport = udphdr->uh_sport;
1301: dport = udphdr->uh_dport;
1302:
1303: /*
1.130 manu 1304: * Remove the UDP header (and possibly the non ESP marker)
1305: * IP header lendth is iphdrlen
1.131 perry 1306: * Before:
1.130 manu 1307: * <--- off --->
1308: * +----+------+-----+
1309: * | IP | UDP | ESP |
1310: * +----+------+-----+
1311: * <-skip->
1312: * After:
1313: * +----+-----+
1314: * | IP | ESP |
1315: * +----+-----+
1316: * <-skip->
1317: */
1318: iphdrlen = off - sizeof(struct udphdr);
1.158 christos 1319: memmove(mtod(m, char *) + skip, mtod(m, void *), iphdrlen);
1.130 manu 1320: m_adj(m, skip);
1321:
1322: ip = mtod(m, struct ip *);
1323: ip->ip_len = htons(ntohs(ip->ip_len) - skip);
1324: ip->ip_p = IPPROTO_ESP;
1325:
1326: /*
1.188 christos 1327: * We have modified the packet - it is now ESP, so we should not
1328: * return to UDP processing ...
1329: *
1.136 manu 1330: * Add a PACKET_TAG_IPSEC_NAT_T_PORT tag to remember
1331: * the source UDP port. This is required if we want
1332: * to select the right SPD for multiple hosts behind
1333: * same NAT
1334: */
1.137 manu 1335: if ((tag = m_tag_get(PACKET_TAG_IPSEC_NAT_T_PORTS,
1336: sizeof(sport) + sizeof(dport), M_DONTWAIT)) == NULL) {
1337: printf("udp4_espinudp: m_tag_get failed\n");
1.188 christos 1338: m_freem(m);
1339: return -1;
1.137 manu 1340: }
1.136 manu 1341: ((u_int16_t *)(tag + 1))[0] = sport;
1342: ((u_int16_t *)(tag + 1))[1] = dport;
1.188 christos 1343: m_tag_prepend(m, tag);
1.136 manu 1344:
1.199 christos 1345: if (ipsec_used)
1346: ipsec4_common_input(m, iphdrlen, IPPROTO_ESP);
1347: /* XXX: else */
1.130 manu 1348:
1.185 liamjfoy 1349: /* We handled it, it shouldn't be handled by UDP */
1.188 christos 1350: *mp = NULL; /* avoid free by caller ... */
1.130 manu 1351: return 1;
1352: }
1353: #endif
1.195 rmind 1354:
1.197 rmind 1355: PR_WRAP_USRREQS(udp)
1356: #define udp_attach udp_attach_wrapper
1357: #define udp_detach udp_detach_wrapper
1.208 rtr 1358: #define udp_accept udp_accept_wrapper
1.210 rtr 1359: #define udp_bind udp_bind_wrapper
1360: #define udp_listen udp_listen_wrapper
1.211 rtr 1361: #define udp_connect udp_connect_wrapper
1.217 rtr 1362: #define udp_connect2 udp_connect2_wrapper
1.212 rtr 1363: #define udp_disconnect udp_disconnect_wrapper
1364: #define udp_shutdown udp_shutdown_wrapper
1365: #define udp_abort udp_abort_wrapper
1.200 rtr 1366: #define udp_ioctl udp_ioctl_wrapper
1.203 rtr 1367: #define udp_stat udp_stat_wrapper
1.207 rtr 1368: #define udp_peeraddr udp_peeraddr_wrapper
1369: #define udp_sockaddr udp_sockaddr_wrapper
1.216 rtr 1370: #define udp_rcvd udp_rcvd_wrapper
1.209 rtr 1371: #define udp_recvoob udp_recvoob_wrapper
1.215 rtr 1372: #define udp_send udp_send_wrapper
1.209 rtr 1373: #define udp_sendoob udp_sendoob_wrapper
1.217 rtr 1374: #define udp_purgeif udp_purgeif_wrapper
1.195 rmind 1375:
1376: const struct pr_usrreqs udp_usrreqs = {
1.196 rmind 1377: .pr_attach = udp_attach,
1378: .pr_detach = udp_detach,
1.208 rtr 1379: .pr_accept = udp_accept,
1.210 rtr 1380: .pr_bind = udp_bind,
1381: .pr_listen = udp_listen,
1.211 rtr 1382: .pr_connect = udp_connect,
1.217 rtr 1383: .pr_connect2 = udp_connect2,
1.212 rtr 1384: .pr_disconnect = udp_disconnect,
1385: .pr_shutdown = udp_shutdown,
1386: .pr_abort = udp_abort,
1.200 rtr 1387: .pr_ioctl = udp_ioctl,
1.203 rtr 1388: .pr_stat = udp_stat,
1.207 rtr 1389: .pr_peeraddr = udp_peeraddr,
1390: .pr_sockaddr = udp_sockaddr,
1.216 rtr 1391: .pr_rcvd = udp_rcvd,
1.209 rtr 1392: .pr_recvoob = udp_recvoob,
1.215 rtr 1393: .pr_send = udp_send,
1.209 rtr 1394: .pr_sendoob = udp_sendoob,
1.217 rtr 1395: .pr_purgeif = udp_purgeif,
1.195 rmind 1396: };
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