Annotation of src/sys/netinet/udp_usrreq.c, Revision 1.119
1.119 ! matt 1: /* $NetBSD: udp_usrreq.c,v 1.118 2004/03/31 07:57:06 itojun 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:
63: #include <sys/cdefs.h>
1.119 ! matt 64: __KERNEL_RCSID(0, "$NetBSD: udp_usrreq.c,v 1.118 2004/03/31 07:57:06 itojun Exp $");
1.50 thorpej 65:
1.77 soda 66: #include "opt_inet.h"
1.50 thorpej 67: #include "opt_ipsec.h"
1.78 thorpej 68: #include "opt_inet_csum.h"
1.64 ws 69: #include "opt_ipkdb.h"
1.101 martin 70: #include "opt_mbuftrace.h"
1.1 cgd 71:
1.5 mycroft 72: #include <sys/param.h>
73: #include <sys/malloc.h>
74: #include <sys/mbuf.h>
75: #include <sys/protosw.h>
76: #include <sys/socket.h>
77: #include <sys/socketvar.h>
1.13 mycroft 78: #include <sys/errno.h>
1.5 mycroft 79: #include <sys/stat.h>
1.27 christos 80: #include <sys/systm.h>
81: #include <sys/proc.h>
1.53 itojun 82: #include <sys/domain.h>
1.27 christos 83: #include <sys/sysctl.h>
1.1 cgd 84:
1.5 mycroft 85: #include <net/if.h>
86: #include <net/route.h>
1.1 cgd 87:
1.5 mycroft 88: #include <netinet/in.h>
89: #include <netinet/in_systm.h>
1.15 cgd 90: #include <netinet/in_var.h>
1.5 mycroft 91: #include <netinet/ip.h>
92: #include <netinet/in_pcb.h>
93: #include <netinet/ip_var.h>
94: #include <netinet/ip_icmp.h>
95: #include <netinet/udp.h>
96: #include <netinet/udp_var.h>
1.1 cgd 97:
1.53 itojun 98: #ifdef INET6
99: #include <netinet/ip6.h>
100: #include <netinet/icmp6.h>
101: #include <netinet6/ip6_var.h>
102: #include <netinet6/in6_pcb.h>
103: #include <netinet6/udp6_var.h>
104: #endif
105:
106: #ifndef INET6
107: /* always need ip6.h for IP6_EXTHDR_GET */
108: #include <netinet/ip6.h>
109: #endif
110:
1.76 itojun 111: #include "faith.h"
112: #if defined(NFAITH) && NFAITH > 0
113: #include <net/if_faith.h>
114: #endif
115:
1.27 christos 116: #include <machine/stdarg.h>
117:
1.105 jonathan 118: #ifdef FAST_IPSEC
119: #include <netipsec/ipsec.h>
120: #ifdef INET6
121: #include <netipsec/ipsec6.h>
122: #endif
123: #endif /* FAST_IPSEC*/
124:
1.48 itojun 125: #ifdef IPSEC
126: #include <netinet6/ipsec.h>
127: #include <netkey/key.h>
128: #endif /*IPSEC*/
129:
1.64 ws 130: #ifdef IPKDB
131: #include <ipkdb/ipkdb.h>
132: #endif
133:
1.8 mycroft 134: /*
135: * UDP protocol implementation.
136: * Per RFC 768, August, 1980.
137: */
138: #ifndef COMPAT_42
139: int udpcksum = 1;
140: #else
141: int udpcksum = 0; /* XXX */
142: #endif
1.93 matt 143:
144: struct inpcbtable udbtable;
145: struct udpstat udpstat;
1.8 mycroft 146:
1.72 itojun 147: #ifdef INET
1.119 ! matt 148: static void udp4_sendup (struct mbuf *, int, struct sockaddr *,
! 149: struct socket *);
! 150: static int udp4_realinput (struct sockaddr_in *, struct sockaddr_in *,
! 151: struct mbuf *, int);
1.72 itojun 152: #endif
1.53 itojun 153: #ifdef INET6
1.119 ! matt 154: static void udp6_sendup (struct mbuf *, int, struct sockaddr *,
! 155: struct socket *);
! 156: static int udp6_realinput (int, struct sockaddr_in6 *,
! 157: struct sockaddr_in6 *, struct mbuf *, int);
1.53 itojun 158: #endif
1.72 itojun 159: #ifdef INET
1.119 ! matt 160: static void udp_notify (struct inpcb *, int);
1.72 itojun 161: #endif
1.7 mycroft 162:
1.26 mycroft 163: #ifndef UDBHASHSIZE
164: #define UDBHASHSIZE 128
165: #endif
166: int udbhashsize = UDBHASHSIZE;
167:
1.98 matt 168: #ifdef MBUFTRACE
169: struct mowner udp_mowner = { "udp" };
170: struct mowner udp_rx_mowner = { "udp", "rx" };
171: struct mowner udp_tx_mowner = { "udp", "tx" };
172: #endif
173:
1.78 thorpej 174: #ifdef UDP_CSUM_COUNTERS
175: #include <sys/device.h>
176:
177: struct evcnt udp_hwcsum_bad = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
178: NULL, "udp", "hwcsum bad");
179: struct evcnt udp_hwcsum_ok = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
180: NULL, "udp", "hwcsum ok");
181: struct evcnt udp_hwcsum_data = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
182: NULL, "udp", "hwcsum data");
183: struct evcnt udp_swcsum = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
184: NULL, "udp", "swcsum");
185:
186: #define UDP_CSUM_COUNTER_INCR(ev) (ev)->ev_count++
187:
188: #else
189:
190: #define UDP_CSUM_COUNTER_INCR(ev) /* nothing */
191:
192: #endif /* UDP_CSUM_COUNTERS */
193:
1.7 mycroft 194: void
1.119 ! matt 195: udp_init(void)
1.1 cgd 196: {
1.18 mycroft 197:
1.35 mycroft 198: in_pcbinit(&udbtable, udbhashsize, udbhashsize);
1.78 thorpej 199:
200: #ifdef UDP_CSUM_COUNTERS
201: evcnt_attach_static(&udp_hwcsum_bad);
202: evcnt_attach_static(&udp_hwcsum_ok);
203: evcnt_attach_static(&udp_hwcsum_data);
204: evcnt_attach_static(&udp_swcsum);
205: #endif /* UDP_CSUM_COUNTERS */
1.98 matt 206:
207: MOWNER_ATTACH(&udp_tx_mowner);
208: MOWNER_ATTACH(&udp_rx_mowner);
209: MOWNER_ATTACH(&udp_mowner);
1.1 cgd 210: }
211:
1.72 itojun 212: #ifdef INET
1.7 mycroft 213: void
1.27 christos 214: udp_input(struct mbuf *m, ...)
1.1 cgd 215: {
1.53 itojun 216: va_list ap;
217: struct sockaddr_in src, dst;
218: struct ip *ip;
219: struct udphdr *uh;
1.97 simonb 220: int iphlen;
1.53 itojun 221: int len;
222: int n;
1.96 itojun 223: u_int16_t ip_len;
1.53 itojun 224:
225: va_start(ap, m);
226: iphlen = va_arg(ap, int);
1.97 simonb 227: (void)va_arg(ap, int); /* ignore value, advance ap */
1.53 itojun 228: va_end(ap);
229:
1.98 matt 230: MCLAIM(m, &udp_rx_mowner);
1.53 itojun 231: udpstat.udps_ipackets++;
232:
233: /*
234: * Get IP and UDP header together in first mbuf.
235: */
236: ip = mtod(m, struct ip *);
237: IP6_EXTHDR_GET(uh, struct udphdr *, m, iphlen, sizeof(struct udphdr));
238: if (uh == NULL) {
239: udpstat.udps_hdrops++;
240: return;
241: }
1.95 thorpej 242: KASSERT(UDP_HDR_ALIGNED_P(uh));
1.53 itojun 243:
1.57 itojun 244: /* destination port of 0 is illegal, based on RFC768. */
245: if (uh->uh_dport == 0)
246: goto bad;
247:
1.53 itojun 248: /*
249: * Make mbuf data length reflect UDP length.
250: * If not enough data to reflect UDP length, drop.
251: */
1.96 itojun 252: ip_len = ntohs(ip->ip_len);
1.53 itojun 253: len = ntohs((u_int16_t)uh->uh_ulen);
1.96 itojun 254: if (ip_len != iphlen + len) {
255: if (ip_len < iphlen + len || len < sizeof(struct udphdr)) {
1.53 itojun 256: udpstat.udps_badlen++;
257: goto bad;
258: }
1.96 itojun 259: m_adj(m, iphlen + len - ip_len);
1.53 itojun 260: }
261:
262: /*
263: * Checksum extended UDP header and data.
264: */
265: if (uh->uh_sum) {
1.78 thorpej 266: switch (m->m_pkthdr.csum_flags &
1.112 enami 267: ((m->m_pkthdr.rcvif->if_csum_flags_rx & M_CSUM_UDPv4) |
268: M_CSUM_TCP_UDP_BAD | M_CSUM_DATA)) {
1.78 thorpej 269: case M_CSUM_UDPv4|M_CSUM_TCP_UDP_BAD:
270: UDP_CSUM_COUNTER_INCR(&udp_hwcsum_bad);
271: goto badcsum;
272:
1.106 jonathan 273: case M_CSUM_UDPv4|M_CSUM_DATA: {
274: u_int32_t hw_csum = m->m_pkthdr.csum_data;
1.78 thorpej 275: UDP_CSUM_COUNTER_INCR(&udp_hwcsum_data);
1.106 jonathan 276: if (m->m_pkthdr.csum_flags & M_CSUM_NO_PSEUDOHDR)
1.112 enami 277: hw_csum = in_cksum_phdr(ip->ip_src.s_addr,
278: ip->ip_dst.s_addr,
1.115 drochner 279: htons(hw_csum + len + IPPROTO_UDP));
1.106 jonathan 280: if ((hw_csum ^ 0xffff) != 0)
1.78 thorpej 281: goto badcsum;
282: break;
1.106 jonathan 283: }
1.78 thorpej 284:
285: case M_CSUM_UDPv4:
286: /* Checksum was okay. */
287: UDP_CSUM_COUNTER_INCR(&udp_hwcsum_ok);
288: break;
289:
290: default:
291: /* Need to compute it ourselves. */
292: UDP_CSUM_COUNTER_INCR(&udp_swcsum);
293: if (in4_cksum(m, IPPROTO_UDP, iphlen, len) != 0)
294: goto badcsum;
295: break;
1.53 itojun 296: }
297: }
298:
299: /* construct source and dst sockaddrs. */
300: bzero(&src, sizeof(src));
301: src.sin_family = AF_INET;
302: src.sin_len = sizeof(struct sockaddr_in);
303: bcopy(&ip->ip_src, &src.sin_addr, sizeof(src.sin_addr));
304: src.sin_port = uh->uh_sport;
305: bzero(&dst, sizeof(dst));
306: dst.sin_family = AF_INET;
307: dst.sin_len = sizeof(struct sockaddr_in);
308: bcopy(&ip->ip_dst, &dst.sin_addr, sizeof(dst.sin_addr));
309: dst.sin_port = uh->uh_dport;
310:
311: n = udp4_realinput(&src, &dst, m, iphlen);
312: #ifdef INET6
313: if (IN_MULTICAST(ip->ip_dst.s_addr) || n == 0) {
314: struct sockaddr_in6 src6, dst6;
315:
316: bzero(&src6, sizeof(src6));
317: src6.sin6_family = AF_INET6;
318: src6.sin6_len = sizeof(struct sockaddr_in6);
319: src6.sin6_addr.s6_addr[10] = src6.sin6_addr.s6_addr[11] = 0xff;
320: bcopy(&ip->ip_src, &src6.sin6_addr.s6_addr[12],
321: sizeof(ip->ip_src));
322: src6.sin6_port = uh->uh_sport;
323: bzero(&dst6, sizeof(dst6));
324: dst6.sin6_family = AF_INET6;
325: dst6.sin6_len = sizeof(struct sockaddr_in6);
326: dst6.sin6_addr.s6_addr[10] = dst6.sin6_addr.s6_addr[11] = 0xff;
327: bcopy(&ip->ip_dst, &dst6.sin6_addr.s6_addr[12],
328: sizeof(ip->ip_dst));
329: dst6.sin6_port = uh->uh_dport;
330:
331: n += udp6_realinput(AF_INET, &src6, &dst6, m, iphlen);
332: }
333: #endif
334:
335: if (n == 0) {
336: if (m->m_flags & (M_BCAST | M_MCAST)) {
337: udpstat.udps_noportbcast++;
338: goto bad;
339: }
1.61 itojun 340: udpstat.udps_noport++;
1.64 ws 341: #ifdef IPKDB
1.53 itojun 342: if (checkipkdb(&ip->ip_src, uh->uh_sport, uh->uh_dport,
343: m, iphlen + sizeof(struct udphdr),
344: m->m_pkthdr.len - iphlen - sizeof(struct udphdr))) {
345: /*
346: * It was a debugger connect packet,
347: * just drop it now
348: */
349: goto bad;
350: }
351: #endif
352: icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0);
353: m = NULL;
354: }
355:
356: bad:
357: if (m)
358: m_freem(m);
1.78 thorpej 359: return;
360:
361: badcsum:
362: m_freem(m);
363: udpstat.udps_badsum++;
1.53 itojun 364: }
1.72 itojun 365: #endif
1.53 itojun 366:
367: #ifdef INET6
368: int
1.119 ! matt 369: udp6_input(struct mbuf **mp, int *offp, int proto)
1.53 itojun 370: {
371: struct mbuf *m = *mp;
372: int off = *offp;
373: struct sockaddr_in6 src, dst;
374: struct ip6_hdr *ip6;
375: struct udphdr *uh;
376: u_int32_t plen, ulen;
377:
1.76 itojun 378: ip6 = mtod(m, struct ip6_hdr *);
379:
1.53 itojun 380: #if defined(NFAITH) && 0 < NFAITH
1.76 itojun 381: if (faithprefix(&ip6->ip6_dst)) {
382: /* send icmp6 host unreach? */
383: m_freem(m);
384: return IPPROTO_DONE;
1.53 itojun 385: }
386: #endif
387:
388: udp6stat.udp6s_ipackets++;
389:
390: /* check for jumbogram is done in ip6_input. we can trust pkthdr.len */
391: plen = m->m_pkthdr.len - off;
392: IP6_EXTHDR_GET(uh, struct udphdr *, m, off, sizeof(struct udphdr));
393: if (uh == NULL) {
394: ip6stat.ip6s_tooshort++;
395: return IPPROTO_DONE;
396: }
1.95 thorpej 397: KASSERT(UDP_HDR_ALIGNED_P(uh));
1.53 itojun 398: ulen = ntohs((u_short)uh->uh_ulen);
1.69 itojun 399: /*
400: * RFC2675 section 4: jumbograms will have 0 in the UDP header field,
401: * iff payload length > 0xffff.
402: */
1.53 itojun 403: if (ulen == 0 && plen > 0xffff)
404: ulen = plen;
405:
406: if (plen != ulen) {
407: udp6stat.udp6s_badlen++;
1.54 itojun 408: goto bad;
409: }
410:
1.57 itojun 411: /* destination port of 0 is illegal, based on RFC768. */
412: if (uh->uh_dport == 0)
413: goto bad;
414:
1.54 itojun 415: /* Be proactive about malicious use of IPv4 mapped address */
416: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
417: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
418: /* XXX stat */
1.53 itojun 419: goto bad;
420: }
421:
422: /*
423: * Checksum extended UDP header and data.
424: */
1.117 itojun 425: if (uh->uh_sum == 0) {
1.53 itojun 426: udp6stat.udp6s_nosum++;
1.117 itojun 427: goto bad;
1.118 itojun 428: }
429: if (in6_cksum(m, IPPROTO_UDP, off, ulen) != 0) {
1.53 itojun 430: udp6stat.udp6s_badsum++;
431: goto bad;
432: }
433:
434: /*
435: * Construct source and dst sockaddrs.
436: * Note that ifindex (s6_addr16[1]) is already filled.
437: */
438: bzero(&src, sizeof(src));
439: src.sin6_family = AF_INET6;
440: src.sin6_len = sizeof(struct sockaddr_in6);
1.69 itojun 441: /* KAME hack: recover scopeid */
442: (void)in6_recoverscope(&src, &ip6->ip6_src, m->m_pkthdr.rcvif);
1.53 itojun 443: src.sin6_port = uh->uh_sport;
444: bzero(&dst, sizeof(dst));
445: dst.sin6_family = AF_INET6;
446: dst.sin6_len = sizeof(struct sockaddr_in6);
1.69 itojun 447: /* KAME hack: recover scopeid */
448: (void)in6_recoverscope(&dst, &ip6->ip6_dst, m->m_pkthdr.rcvif);
1.53 itojun 449: dst.sin6_port = uh->uh_dport;
450:
451: if (udp6_realinput(AF_INET6, &src, &dst, m, off) == 0) {
452: if (m->m_flags & M_MCAST) {
453: udp6stat.udp6s_noportmcast++;
454: goto bad;
455: }
1.61 itojun 456: udp6stat.udp6s_noport++;
1.53 itojun 457: icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0);
458: m = NULL;
459: }
460:
461: bad:
462: if (m)
463: m_freem(m);
464: return IPPROTO_DONE;
465: }
466: #endif
467:
1.72 itojun 468: #ifdef INET
1.53 itojun 469: static void
1.119 ! matt 470: udp4_sendup(struct mbuf *m, int off /* offset of data portion */,
! 471: struct sockaddr *src, struct socket *so)
1.53 itojun 472: {
473: struct mbuf *opts = NULL;
474: struct mbuf *n;
475: struct inpcb *inp = NULL;
476:
477: if (!so)
478: return;
479: switch (so->so_proto->pr_domain->dom_family) {
480: case AF_INET:
481: inp = sotoinpcb(so);
482: break;
483: #ifdef INET6
484: case AF_INET6:
485: break;
486: #endif
487: default:
488: return;
489: }
490:
1.105 jonathan 491: #if defined(IPSEC) || defined(FAST_IPSEC)
1.53 itojun 492: /* check AH/ESP integrity. */
493: if (so != NULL && ipsec4_in_reject_so(m, so)) {
494: ipsecstat.in_polvio++;
1.110 itojun 495: if ((n = m_copy(m, 0, M_COPYALL)) != NULL)
496: icmp_error(n, ICMP_UNREACH, ICMP_UNREACH_ADMIN_PROHIBIT,
497: 0, 0);
1.53 itojun 498: return;
499: }
500: #endif /*IPSEC*/
501:
502: if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
503: if (inp && (inp->inp_flags & INP_CONTROLOPTS
504: || so->so_options & SO_TIMESTAMP)) {
505: struct ip *ip = mtod(n, struct ip *);
506: ip_savecontrol(inp, &opts, ip, n);
507: }
508:
509: m_adj(n, off);
510: if (sbappendaddr(&so->so_rcv, src, n,
511: opts) == 0) {
512: m_freem(n);
513: if (opts)
514: m_freem(opts);
1.81 enami 515: udpstat.udps_fullsock++;
1.53 itojun 516: } else
517: sorwakeup(so);
518: }
519: }
1.72 itojun 520: #endif
1.53 itojun 521:
522: #ifdef INET6
523: static void
1.119 ! matt 524: udp6_sendup(struct mbuf *m, int off /* offset of data portion */,
! 525: struct sockaddr *src, struct socket *so)
1.53 itojun 526: {
527: struct mbuf *opts = NULL;
528: struct mbuf *n;
529: struct in6pcb *in6p = NULL;
530:
531: if (!so)
532: return;
533: if (so->so_proto->pr_domain->dom_family != AF_INET6)
534: return;
535: in6p = sotoin6pcb(so);
536:
1.105 jonathan 537: #if defined(IPSEC) || defined(FAST_IPSEC)
1.53 itojun 538: /* check AH/ESP integrity. */
539: if (so != NULL && ipsec6_in_reject_so(m, so)) {
540: ipsec6stat.in_polvio++;
1.111 mycroft 541: if ((n = m_copy(m, 0, M_COPYALL)) != NULL)
1.110 itojun 542: icmp6_error(n, ICMP6_DST_UNREACH,
543: ICMP6_DST_UNREACH_ADMIN, 0);
1.53 itojun 544: return;
545: }
546: #endif /*IPSEC*/
547:
548: if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
549: if (in6p && (in6p->in6p_flags & IN6P_CONTROLOPTS
550: || in6p->in6p_socket->so_options & SO_TIMESTAMP)) {
551: struct ip6_hdr *ip6 = mtod(n, struct ip6_hdr *);
552: ip6_savecontrol(in6p, &opts, ip6, n);
553: }
554:
555: m_adj(n, off);
556: if (sbappendaddr(&so->so_rcv, src, n, opts) == 0) {
557: m_freem(n);
558: if (opts)
559: m_freem(opts);
560: udp6stat.udp6s_fullsock++;
561: } else
562: sorwakeup(so);
563: }
564: }
565: #endif
566:
1.72 itojun 567: #ifdef INET
1.53 itojun 568: static int
1.119 ! matt 569: udp4_realinput(struct sockaddr_in *src, struct sockaddr_in *dst,
! 570: struct mbuf *m, int off /* offset of udphdr */)
1.53 itojun 571: {
572: u_int16_t *sport, *dport;
573: int rcvcnt;
574: struct in_addr *src4, *dst4;
1.109 itojun 575: struct inpcb_hdr *inph;
1.53 itojun 576: struct inpcb *inp;
577:
578: rcvcnt = 0;
579: off += sizeof(struct udphdr); /* now, offset of payload */
580:
581: if (src->sin_family != AF_INET || dst->sin_family != AF_INET)
582: goto bad;
583:
584: src4 = &src->sin_addr;
585: sport = &src->sin_port;
586: dst4 = &dst->sin_addr;
587: dport = &dst->sin_port;
588:
1.73 itojun 589: if (IN_MULTICAST(dst4->s_addr) ||
1.53 itojun 590: in_broadcast(*dst4, m->m_pkthdr.rcvif)) {
591: /*
592: * Deliver a multicast or broadcast datagram to *all* sockets
593: * for which the local and remote addresses and ports match
594: * those of the incoming datagram. This allows more than
595: * one process to receive multi/broadcasts on the same port.
596: * (This really ought to be done for unicast datagrams as
597: * well, but that would cause problems with existing
598: * applications that open both address-specific sockets and
599: * a wildcard socket listening to the same port -- they would
600: * end up receiving duplicates of every unicast datagram.
601: * Those applications open the multiple sockets to overcome an
602: * inadequacy of the UDP socket interface, but for backwards
603: * compatibility we avoid the problem here rather than
604: * fixing the interface. Maybe 4.5BSD will remedy this?)
605: */
606:
607: /*
1.92 itojun 608: * KAME note: traditionally we dropped udpiphdr from mbuf here.
1.71 itojun 609: * we need udpiphdr for IPsec processing so we do that later.
1.53 itojun 610: */
611: /*
612: * Locate pcb(s) for datagram.
613: */
1.109 itojun 614: CIRCLEQ_FOREACH(inph, &udbtable.inpt_queue, inph_queue) {
615: inp = (struct inpcb *)inph;
616: if (inp->inp_af != AF_INET)
617: continue;
618:
1.53 itojun 619: if (inp->inp_lport != *dport)
620: continue;
621: if (!in_nullhost(inp->inp_laddr)) {
622: if (!in_hosteq(inp->inp_laddr, *dst4))
623: continue;
624: }
625: if (!in_nullhost(inp->inp_faddr)) {
626: if (!in_hosteq(inp->inp_faddr, *src4) ||
627: inp->inp_fport != *sport)
628: continue;
629: }
630:
631: udp4_sendup(m, off, (struct sockaddr *)src,
632: inp->inp_socket);
633: rcvcnt++;
634:
635: /*
636: * Don't look for additional matches if this one does
637: * not have either the SO_REUSEPORT or SO_REUSEADDR
638: * socket options set. This heuristic avoids searching
639: * through all pcbs in the common case of a non-shared
640: * port. It assumes that an application will never
641: * clear these options after setting them.
642: */
643: if ((inp->inp_socket->so_options &
644: (SO_REUSEPORT|SO_REUSEADDR)) == 0)
645: break;
646: }
647: } else {
648: /*
649: * Locate pcb for datagram.
650: */
651: inp = in_pcblookup_connect(&udbtable, *src4, *sport, *dst4, *dport);
652: if (inp == 0) {
653: ++udpstat.udps_pcbhashmiss;
654: inp = in_pcblookup_bind(&udbtable, *dst4, *dport);
1.82 itojun 655: if (inp == 0)
1.53 itojun 656: return rcvcnt;
657: }
658:
659: udp4_sendup(m, off, (struct sockaddr *)src, inp->inp_socket);
660: rcvcnt++;
661: }
662:
663: bad:
664: return rcvcnt;
665: }
1.72 itojun 666: #endif
1.53 itojun 667:
668: #ifdef INET6
669: static int
1.119 ! matt 670: udp6_realinput(int af, struct sockaddr_in6 *src, struct sockaddr_in6 *dst,
! 671: struct mbuf *m, int off)
1.53 itojun 672: {
1.79 itojun 673: u_int16_t sport, dport;
1.53 itojun 674: int rcvcnt;
1.79 itojun 675: struct in6_addr src6, dst6;
676: const struct in_addr *dst4;
1.109 itojun 677: struct inpcb_hdr *inph;
1.53 itojun 678: struct in6pcb *in6p;
679:
680: rcvcnt = 0;
681: off += sizeof(struct udphdr); /* now, offset of payload */
682:
683: if (af != AF_INET && af != AF_INET6)
684: goto bad;
685: if (src->sin6_family != AF_INET6 || dst->sin6_family != AF_INET6)
686: goto bad;
687:
1.79 itojun 688: in6_embedscope(&src6, src, NULL, NULL);
689: sport = src->sin6_port;
690: in6_embedscope(&dst6, dst, NULL, NULL);
691: dport = dst->sin6_port;
1.88 itojun 692: dst4 = (struct in_addr *)&dst->sin6_addr.s6_addr[12];
1.53 itojun 693:
1.79 itojun 694: if (IN6_IS_ADDR_MULTICAST(&dst6) ||
695: (af == AF_INET && IN_MULTICAST(dst4->s_addr))) {
1.53 itojun 696: /*
697: * Deliver a multicast or broadcast datagram to *all* sockets
698: * for which the local and remote addresses and ports match
699: * those of the incoming datagram. This allows more than
700: * one process to receive multi/broadcasts on the same port.
701: * (This really ought to be done for unicast datagrams as
702: * well, but that would cause problems with existing
703: * applications that open both address-specific sockets and
704: * a wildcard socket listening to the same port -- they would
705: * end up receiving duplicates of every unicast datagram.
706: * Those applications open the multiple sockets to overcome an
707: * inadequacy of the UDP socket interface, but for backwards
708: * compatibility we avoid the problem here rather than
709: * fixing the interface. Maybe 4.5BSD will remedy this?)
710: */
711:
712: /*
1.92 itojun 713: * KAME note: traditionally we dropped udpiphdr from mbuf here.
1.71 itojun 714: * we need udpiphdr for IPsec processing so we do that later.
1.53 itojun 715: */
716: /*
717: * Locate pcb(s) for datagram.
718: */
1.109 itojun 719: CIRCLEQ_FOREACH(inph, &udbtable.inpt_queue, inph_queue) {
720: in6p = (struct in6pcb *)inph;
721: if (in6p->in6p_af != AF_INET6)
722: continue;
723:
1.79 itojun 724: if (in6p->in6p_lport != dport)
1.53 itojun 725: continue;
726: if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) {
1.90 itojun 727: if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &dst6))
1.53 itojun 728: continue;
1.92 itojun 729: } else {
1.79 itojun 730: if (IN6_IS_ADDR_V4MAPPED(&dst6) &&
1.85 itojun 731: (in6p->in6p_flags & IN6P_IPV6_V6ONLY))
1.55 itojun 732: continue;
733: }
1.53 itojun 734: if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
1.79 itojun 735: if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr,
736: &src6) || in6p->in6p_fport != sport)
1.53 itojun 737: continue;
1.92 itojun 738: } else {
1.79 itojun 739: if (IN6_IS_ADDR_V4MAPPED(&src6) &&
1.85 itojun 740: (in6p->in6p_flags & IN6P_IPV6_V6ONLY))
1.55 itojun 741: continue;
742: }
1.53 itojun 743:
744: udp6_sendup(m, off, (struct sockaddr *)src,
745: in6p->in6p_socket);
746: rcvcnt++;
747:
748: /*
749: * Don't look for additional matches if this one does
750: * not have either the SO_REUSEPORT or SO_REUSEADDR
751: * socket options set. This heuristic avoids searching
752: * through all pcbs in the common case of a non-shared
753: * port. It assumes that an application will never
754: * clear these options after setting them.
755: */
756: if ((in6p->in6p_socket->so_options &
757: (SO_REUSEPORT|SO_REUSEADDR)) == 0)
758: break;
759: }
760: } else {
761: /*
762: * Locate pcb for datagram.
763: */
1.109 itojun 764: in6p = in6_pcblookup_connect(&udbtable, &src6, sport,
1.79 itojun 765: &dst6, dport, 0);
1.53 itojun 766: if (in6p == 0) {
767: ++udpstat.udps_pcbhashmiss;
1.109 itojun 768: in6p = in6_pcblookup_bind(&udbtable, &dst6, dport, 0);
1.82 itojun 769: if (in6p == 0)
1.53 itojun 770: return rcvcnt;
771: }
772:
773: udp6_sendup(m, off, (struct sockaddr *)src, in6p->in6p_socket);
774: rcvcnt++;
775: }
776:
777: bad:
778: return rcvcnt;
779: }
780: #endif
1.1 cgd 781:
1.72 itojun 782: #ifdef INET
1.1 cgd 783: /*
784: * Notify a udp user of an asynchronous error;
785: * just wake up so that he can collect error status.
786: */
1.7 mycroft 787: static void
1.119 ! matt 788: udp_notify(struct inpcb *inp, int errno)
1.1 cgd 789: {
790: inp->inp_socket->so_error = errno;
791: sorwakeup(inp->inp_socket);
792: sowwakeup(inp->inp_socket);
793: }
794:
1.27 christos 795: void *
1.119 ! matt 796: udp_ctlinput(int cmd, struct sockaddr *sa, void *v)
1.1 cgd 797: {
1.66 augustss 798: struct ip *ip = v;
799: struct udphdr *uh;
1.119 ! matt 800: void (*notify)(struct inpcb *, int) = udp_notify;
1.21 mycroft 801: int errno;
1.1 cgd 802:
1.53 itojun 803: if (sa->sa_family != AF_INET
804: || sa->sa_len != sizeof(struct sockaddr_in))
1.51 itojun 805: return NULL;
1.20 mycroft 806: if ((unsigned)cmd >= PRC_NCMDS)
1.27 christos 807: return NULL;
1.20 mycroft 808: errno = inetctlerrmap[cmd];
1.18 mycroft 809: if (PRC_IS_REDIRECT(cmd))
1.19 mycroft 810: notify = in_rtchange, ip = 0;
1.18 mycroft 811: else if (cmd == PRC_HOSTDEAD)
1.19 mycroft 812: ip = 0;
1.23 cgd 813: else if (errno == 0)
1.27 christos 814: return NULL;
1.19 mycroft 815: if (ip) {
1.1 cgd 816: uh = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2));
1.34 mycroft 817: in_pcbnotify(&udbtable, satosin(sa)->sin_addr, uh->uh_dport,
818: ip->ip_src, uh->uh_sport, errno, notify);
1.53 itojun 819:
820: /* XXX mapped address case */
1.19 mycroft 821: } else
1.34 mycroft 822: in_pcbnotifyall(&udbtable, satosin(sa)->sin_addr, errno,
823: notify);
1.27 christos 824: return NULL;
1.1 cgd 825: }
826:
1.7 mycroft 827: int
1.27 christos 828: udp_output(struct mbuf *m, ...)
829: {
1.66 augustss 830: struct inpcb *inp;
831: struct udpiphdr *ui;
832: int len = m->m_pkthdr.len;
1.31 mycroft 833: int error = 0;
1.27 christos 834: va_list ap;
835:
1.98 matt 836: MCLAIM(m, &udp_tx_mowner);
1.27 christos 837: va_start(ap, m);
838: inp = va_arg(ap, struct inpcb *);
839: va_end(ap);
1.1 cgd 840:
841: /*
842: * Calculate data length and get a mbuf
843: * for UDP and IP headers.
844: */
1.13 mycroft 845: M_PREPEND(m, sizeof(struct udpiphdr), M_DONTWAIT);
846: if (m == 0) {
847: error = ENOBUFS;
1.39 thorpej 848: goto release;
849: }
850:
851: /*
852: * Compute the packet length of the IP header, and
853: * punt if the length looks bogus.
854: */
1.96 itojun 855: if (len + sizeof(struct udpiphdr) > IP_MAXPACKET) {
1.39 thorpej 856: error = EMSGSIZE;
1.13 mycroft 857: goto release;
858: }
1.1 cgd 859:
860: /*
861: * Fill in mbuf with extended UDP header
862: * and addresses and length put into network format.
863: */
864: ui = mtod(m, struct udpiphdr *);
865: ui->ui_pr = IPPROTO_UDP;
866: ui->ui_src = inp->inp_laddr;
867: ui->ui_dst = inp->inp_faddr;
868: ui->ui_sport = inp->inp_lport;
869: ui->ui_dport = inp->inp_fport;
1.78 thorpej 870: ui->ui_ulen = htons((u_int16_t)len + sizeof(struct udphdr));
1.1 cgd 871:
872: /*
1.78 thorpej 873: * Set up checksum and output datagram.
1.1 cgd 874: */
875: if (udpcksum) {
1.78 thorpej 876: /*
877: * XXX Cache pseudo-header checksum part for
878: * XXX "connected" UDP sockets.
879: */
880: ui->ui_sum = in_cksum_phdr(ui->ui_src.s_addr,
881: ui->ui_dst.s_addr, htons((u_int16_t)len +
882: sizeof(struct udphdr) + IPPROTO_UDP));
883: m->m_pkthdr.csum_flags = M_CSUM_UDPv4;
884: m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum);
885: } else
886: ui->ui_sum = 0;
1.96 itojun 887: ((struct ip *)ui)->ip_len = htons(sizeof (struct udpiphdr) + len);
1.1 cgd 888: ((struct ip *)ui)->ip_ttl = inp->inp_ip.ip_ttl; /* XXX */
889: ((struct ip *)ui)->ip_tos = inp->inp_ip.ip_tos; /* XXX */
890: udpstat.udps_opackets++;
1.48 itojun 891:
1.31 mycroft 892: return (ip_output(m, inp->inp_options, &inp->inp_route,
1.12 mycroft 893: inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST),
1.107 itojun 894: inp->inp_moptions, inp->inp_socket));
1.1 cgd 895:
896: release:
897: m_freem(m);
898: return (error);
899: }
900:
1.42 thorpej 901: int udp_sendspace = 9216; /* really max datagram size */
902: int udp_recvspace = 40 * (1024 + sizeof(struct sockaddr_in));
1.1 cgd 903: /* 40 1K datagrams */
904:
905: /*ARGSUSED*/
1.7 mycroft 906: int
1.119 ! matt 907: udp_usrreq(struct socket *so, int req, struct mbuf *m, struct mbuf *nam,
! 908: struct mbuf *control, struct proc *p)
1.1 cgd 909: {
1.66 augustss 910: struct inpcb *inp;
1.1 cgd 911: int s;
1.66 augustss 912: int error = 0;
1.1 cgd 913:
914: if (req == PRU_CONTROL)
1.31 mycroft 915: return (in_control(so, (long)m, (caddr_t)nam,
1.30 mycroft 916: (struct ifnet *)control, p));
1.59 thorpej 917:
1.60 thorpej 918: if (req == PRU_PURGEIF) {
1.80 itojun 919: in_pcbpurgeif0(&udbtable, (struct ifnet *)control);
1.60 thorpej 920: in_purgeif((struct ifnet *)control);
921: in_pcbpurgeif(&udbtable, (struct ifnet *)control);
1.59 thorpej 922: return (0);
923: }
1.31 mycroft 924:
925: s = splsoftnet();
926: inp = sotoinpcb(so);
1.32 mycroft 927: #ifdef DIAGNOSTIC
928: if (req != PRU_SEND && req != PRU_SENDOOB && control)
929: panic("udp_usrreq: unexpected control mbuf");
930: #endif
1.31 mycroft 931: if (inp == 0 && req != PRU_ATTACH) {
932: error = EINVAL;
933: goto release;
934: }
935:
1.1 cgd 936: /*
937: * Note: need to block udp_input while changing
938: * the udp pcb queue and/or pcb addresses.
939: */
940: switch (req) {
941:
942: case PRU_ATTACH:
1.31 mycroft 943: if (inp != 0) {
944: error = EISCONN;
1.1 cgd 945: break;
946: }
1.98 matt 947: #ifdef MBUFTRACE
948: so->so_mowner = &udp_mowner;
949: so->so_rcv.sb_mowner = &udp_rx_mowner;
950: so->so_snd.sb_mowner = &udp_tx_mowner;
951: #endif
1.31 mycroft 952: if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
953: error = soreserve(so, udp_sendspace, udp_recvspace);
954: if (error)
955: break;
956: }
1.18 mycroft 957: error = in_pcballoc(so, &udbtable);
1.1 cgd 958: if (error)
959: break;
1.31 mycroft 960: inp = sotoinpcb(so);
961: inp->inp_ip.ip_ttl = ip_defttl;
1.1 cgd 962: break;
963:
964: case PRU_DETACH:
1.31 mycroft 965: in_pcbdetach(inp);
1.1 cgd 966: break;
967:
968: case PRU_BIND:
1.31 mycroft 969: error = in_pcbbind(inp, nam, p);
1.1 cgd 970: break;
971:
972: case PRU_LISTEN:
973: error = EOPNOTSUPP;
974: break;
975:
976: case PRU_CONNECT:
1.31 mycroft 977: error = in_pcbconnect(inp, nam);
978: if (error)
1.1 cgd 979: break;
1.31 mycroft 980: soisconnected(so);
1.1 cgd 981: break;
982:
983: case PRU_CONNECT2:
984: error = EOPNOTSUPP;
985: break;
986:
987: case PRU_DISCONNECT:
1.31 mycroft 988: /*soisdisconnected(so);*/
989: so->so_state &= ~SS_ISCONNECTED; /* XXX */
1.1 cgd 990: in_pcbdisconnect(inp);
1.34 mycroft 991: inp->inp_laddr = zeroin_addr; /* XXX */
1.35 mycroft 992: in_pcbstate(inp, INP_BOUND); /* XXX */
1.1 cgd 993: break;
994:
995: case PRU_SHUTDOWN:
996: socantsendmore(so);
997: break;
998:
1.31 mycroft 999: case PRU_RCVD:
1000: error = EOPNOTSUPP;
1.1 cgd 1001: break;
1002:
1.31 mycroft 1003: case PRU_SEND:
1.32 mycroft 1004: if (control && control->m_len) {
1005: m_freem(control);
1006: m_freem(m);
1007: error = EINVAL;
1008: break;
1009: }
1.31 mycroft 1010: {
1.35 mycroft 1011: struct in_addr laddr; /* XXX */
1.1 cgd 1012:
1.31 mycroft 1013: if (nam) {
1.35 mycroft 1014: laddr = inp->inp_laddr; /* XXX */
1.31 mycroft 1015: if ((so->so_state & SS_ISCONNECTED) != 0) {
1016: error = EISCONN;
1.32 mycroft 1017: goto die;
1.31 mycroft 1018: }
1019: error = in_pcbconnect(inp, nam);
1.100 matt 1020: if (error)
1021: goto die;
1.31 mycroft 1022: } else {
1023: if ((so->so_state & SS_ISCONNECTED) == 0) {
1024: error = ENOTCONN;
1.32 mycroft 1025: goto die;
1.31 mycroft 1026: }
1027: }
1.33 mycroft 1028: error = udp_output(m, inp);
1.100 matt 1029: m = NULL;
1.31 mycroft 1030: if (nam) {
1031: in_pcbdisconnect(inp);
1.35 mycroft 1032: inp->inp_laddr = laddr; /* XXX */
1033: in_pcbstate(inp, INP_BOUND); /* XXX */
1.31 mycroft 1034: }
1.100 matt 1035: die:
1036: if (m)
1037: m_freem(m);
1.31 mycroft 1038: }
1.1 cgd 1039: break;
1040:
1041: case PRU_SENSE:
1042: /*
1043: * stat: don't bother with a blocksize.
1044: */
1.31 mycroft 1045: splx(s);
1.1 cgd 1046: return (0);
1047:
1.31 mycroft 1048: case PRU_RCVOOB:
1049: error = EOPNOTSUPP;
1050: break;
1051:
1.1 cgd 1052: case PRU_SENDOOB:
1.32 mycroft 1053: m_freem(control);
1.31 mycroft 1054: m_freem(m);
1.1 cgd 1055: error = EOPNOTSUPP;
1056: break;
1057:
1.31 mycroft 1058: case PRU_SOCKADDR:
1059: in_setsockaddr(inp, nam);
1060: break;
1061:
1062: case PRU_PEERADDR:
1063: in_setpeeraddr(inp, nam);
1064: break;
1.1 cgd 1065:
1066: default:
1067: panic("udp_usrreq");
1068: }
1069:
1070: release:
1.31 mycroft 1071: splx(s);
1.1 cgd 1072: return (error);
1.13 mycroft 1073: }
1074:
1075: /*
1076: * Sysctl for udp variables.
1077: */
1.114 atatat 1078: SYSCTL_SETUP(sysctl_net_inet_udp_setup, "sysctl net.inet.udp subtree setup")
1.13 mycroft 1079: {
1.114 atatat 1080:
1.116 atatat 1081: sysctl_createv(clog, 0, NULL, NULL,
1082: CTLFLAG_PERMANENT,
1.114 atatat 1083: CTLTYPE_NODE, "net", NULL,
1084: NULL, 0, NULL, 0,
1085: CTL_NET, CTL_EOL);
1.116 atatat 1086: sysctl_createv(clog, 0, NULL, NULL,
1087: CTLFLAG_PERMANENT,
1.114 atatat 1088: CTLTYPE_NODE, "inet", NULL,
1089: NULL, 0, NULL, 0,
1090: CTL_NET, PF_INET, CTL_EOL);
1.116 atatat 1091: sysctl_createv(clog, 0, NULL, NULL,
1092: CTLFLAG_PERMANENT,
1.114 atatat 1093: CTLTYPE_NODE, "udp", NULL,
1094: NULL, 0, NULL, 0,
1095: CTL_NET, PF_INET, IPPROTO_UDP, CTL_EOL);
1096:
1.116 atatat 1097: sysctl_createv(clog, 0, NULL, NULL,
1098: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.114 atatat 1099: CTLTYPE_INT, "checksum", NULL,
1100: NULL, 0, &udpcksum, 0,
1101: CTL_NET, PF_INET, IPPROTO_UDP, UDPCTL_CHECKSUM,
1102: CTL_EOL);
1.116 atatat 1103: sysctl_createv(clog, 0, NULL, NULL,
1104: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.114 atatat 1105: CTLTYPE_INT, "sendspace", NULL,
1106: NULL, 0, &udp_sendspace, 0,
1107: CTL_NET, PF_INET, IPPROTO_UDP, UDPCTL_SENDSPACE,
1108: CTL_EOL);
1.116 atatat 1109: sysctl_createv(clog, 0, NULL, NULL,
1110: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.114 atatat 1111: CTLTYPE_INT, "recvspace", NULL,
1112: NULL, 0, &udp_recvspace, 0,
1113: CTL_NET, PF_INET, IPPROTO_UDP, UDPCTL_RECVSPACE,
1114: CTL_EOL);
1.1 cgd 1115: }
1.72 itojun 1116: #endif
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