Annotation of src/sys/netinet/udp_usrreq.c, Revision 1.129
1.129 ! yamt 1: /* $NetBSD: udp_usrreq.c,v 1.128 2004/12/19 06:42:24 christos 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>
1.129 ! yamt 64: __KERNEL_RCSID(0, "$NetBSD: udp_usrreq.c,v 1.128 2004/12/19 06:42:24 christos 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>
1.121 jonathan 120: #include <netipsec/ipsec_var.h> /* XXX ipsecstat namespace */
1.105 jonathan 121: #ifdef INET6
122: #include <netipsec/ipsec6.h>
123: #endif
124: #endif /* FAST_IPSEC*/
125:
1.48 itojun 126: #ifdef IPSEC
127: #include <netinet6/ipsec.h>
128: #include <netkey/key.h>
129: #endif /*IPSEC*/
130:
1.64 ws 131: #ifdef IPKDB
132: #include <ipkdb/ipkdb.h>
133: #endif
134:
1.8 mycroft 135: /*
136: * UDP protocol implementation.
137: * Per RFC 768, August, 1980.
138: */
139: #ifndef COMPAT_42
140: int udpcksum = 1;
141: #else
142: int udpcksum = 0; /* XXX */
143: #endif
1.128 christos 144: int udp_do_loopback_cksum = 0;
1.93 matt 145:
146: struct inpcbtable udbtable;
147: struct udpstat udpstat;
1.8 mycroft 148:
1.72 itojun 149: #ifdef INET
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 *,
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
1.53 itojun 156: #ifdef INET6
1.119 matt 157: static void udp6_sendup (struct mbuf *, int, struct sockaddr *,
158: struct socket *);
159: static int udp6_realinput (int, struct sockaddr_in6 *,
160: struct sockaddr_in6 *, struct mbuf *, int);
1.129 ! yamt 161: static int udp6_input_checksum(struct mbuf *, const struct udphdr *, int, int);
1.53 itojun 162: #endif
1.72 itojun 163: #ifdef INET
1.119 matt 164: static void udp_notify (struct inpcb *, int);
1.72 itojun 165: #endif
1.7 mycroft 166:
1.26 mycroft 167: #ifndef UDBHASHSIZE
168: #define UDBHASHSIZE 128
169: #endif
170: int udbhashsize = UDBHASHSIZE;
171:
1.98 matt 172: #ifdef MBUFTRACE
173: struct mowner udp_mowner = { "udp" };
174: struct mowner udp_rx_mowner = { "udp", "rx" };
175: struct mowner udp_tx_mowner = { "udp", "tx" };
176: #endif
177:
1.78 thorpej 178: #ifdef UDP_CSUM_COUNTERS
179: #include <sys/device.h>
180:
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:
190: #define UDP_CSUM_COUNTER_INCR(ev) (ev)->ev_count++
191:
1.120 matt 192: EVCNT_ATTACH_STATIC(udp_hwcsum_bad);
193: EVCNT_ATTACH_STATIC(udp_hwcsum_ok);
194: EVCNT_ATTACH_STATIC(udp_hwcsum_data);
195: EVCNT_ATTACH_STATIC(udp_swcsum);
196:
1.78 thorpej 197: #else
198:
199: #define UDP_CSUM_COUNTER_INCR(ev) /* nothing */
200:
201: #endif /* UDP_CSUM_COUNTERS */
202:
1.7 mycroft 203: void
1.119 matt 204: udp_init(void)
1.1 cgd 205: {
1.18 mycroft 206:
1.35 mycroft 207: in_pcbinit(&udbtable, udbhashsize, udbhashsize);
1.78 thorpej 208:
1.98 matt 209: MOWNER_ATTACH(&udp_tx_mowner);
210: MOWNER_ATTACH(&udp_rx_mowner);
211: MOWNER_ATTACH(&udp_mowner);
1.1 cgd 212: }
213:
1.129 ! yamt 214: /*
! 215: * Checksum extended UDP header and data.
! 216: */
! 217:
! 218: int
! 219: udp_input_checksum(int af, struct mbuf *m, const struct udphdr *uh,
! 220: int iphlen, int len)
! 221: {
! 222:
! 223: switch (af) {
1.72 itojun 224: #ifdef INET
1.129 ! yamt 225: case AF_INET:
! 226: return udp4_input_checksum(m, uh, iphlen, len);
! 227: #endif
! 228: #ifdef INET6
! 229: case AF_INET6:
! 230: return udp6_input_checksum(m, uh, iphlen, len);
! 231: #endif
! 232: }
! 233: #ifdef DIAGNOSTIC
! 234: panic("udp_input_checksum: unknown af %d", af);
! 235: #endif
! 236: /* NOTREACHED */
! 237: return -1;
! 238: }
! 239:
! 240: #ifdef INET
! 241:
! 242: /*
! 243: * Checksum extended UDP header and data.
! 244: */
! 245:
! 246: static int
! 247: udp4_input_checksum(struct mbuf *m, const struct udphdr *uh,
! 248: int iphlen, int len)
! 249: {
! 250:
! 251: /*
! 252: * XXX it's better to record and check if this mbuf is
! 253: * already checked.
! 254: */
! 255:
! 256: if (uh->uh_sum == 0)
! 257: return 0;
! 258:
! 259: switch (m->m_pkthdr.csum_flags &
! 260: ((m->m_pkthdr.rcvif->if_csum_flags_rx & M_CSUM_UDPv4) |
! 261: M_CSUM_TCP_UDP_BAD | M_CSUM_DATA)) {
! 262: case M_CSUM_UDPv4|M_CSUM_TCP_UDP_BAD:
! 263: UDP_CSUM_COUNTER_INCR(&udp_hwcsum_bad);
! 264: goto badcsum;
! 265:
! 266: case M_CSUM_UDPv4|M_CSUM_DATA: {
! 267: u_int32_t hw_csum = m->m_pkthdr.csum_data;
! 268:
! 269: UDP_CSUM_COUNTER_INCR(&udp_hwcsum_data);
! 270: if (m->m_pkthdr.csum_flags & M_CSUM_NO_PSEUDOHDR) {
! 271: const struct ip *ip =
! 272: mtod(m, const struct ip *);
! 273:
! 274: hw_csum = in_cksum_phdr(ip->ip_src.s_addr,
! 275: ip->ip_dst.s_addr,
! 276: htons(hw_csum + len + IPPROTO_UDP));
! 277: }
! 278: if ((hw_csum ^ 0xffff) != 0)
! 279: goto badcsum;
! 280: break;
! 281: }
! 282:
! 283: case M_CSUM_UDPv4:
! 284: /* Checksum was okay. */
! 285: UDP_CSUM_COUNTER_INCR(&udp_hwcsum_ok);
! 286: break;
! 287:
! 288: default:
! 289: /*
! 290: * Need to compute it ourselves. Maybe skip checksum
! 291: * on loopback interfaces.
! 292: */
! 293: if (__predict_true(!(m->m_pkthdr.rcvif->if_flags &
! 294: IFF_LOOPBACK) ||
! 295: udp_do_loopback_cksum)) {
! 296: UDP_CSUM_COUNTER_INCR(&udp_swcsum);
! 297: if (in4_cksum(m, IPPROTO_UDP, iphlen, len) != 0)
! 298: goto badcsum;
! 299: }
! 300: break;
! 301: }
! 302:
! 303: return 0;
! 304:
! 305: badcsum:
! 306: udpstat.udps_badsum++;
! 307: return -1;
! 308: }
! 309:
1.7 mycroft 310: void
1.27 christos 311: udp_input(struct mbuf *m, ...)
1.1 cgd 312: {
1.53 itojun 313: va_list ap;
314: struct sockaddr_in src, dst;
315: struct ip *ip;
316: struct udphdr *uh;
1.97 simonb 317: int iphlen;
1.53 itojun 318: int len;
319: int n;
1.96 itojun 320: u_int16_t ip_len;
1.53 itojun 321:
322: va_start(ap, m);
323: iphlen = va_arg(ap, int);
1.97 simonb 324: (void)va_arg(ap, int); /* ignore value, advance ap */
1.53 itojun 325: va_end(ap);
326:
1.98 matt 327: MCLAIM(m, &udp_rx_mowner);
1.53 itojun 328: udpstat.udps_ipackets++;
329:
330: /*
331: * Get IP and UDP header together in first mbuf.
332: */
333: ip = mtod(m, struct ip *);
334: IP6_EXTHDR_GET(uh, struct udphdr *, m, iphlen, sizeof(struct udphdr));
335: if (uh == NULL) {
336: udpstat.udps_hdrops++;
337: return;
338: }
1.95 thorpej 339: KASSERT(UDP_HDR_ALIGNED_P(uh));
1.53 itojun 340:
1.57 itojun 341: /* destination port of 0 is illegal, based on RFC768. */
342: if (uh->uh_dport == 0)
343: goto bad;
344:
1.53 itojun 345: /*
346: * Make mbuf data length reflect UDP length.
347: * If not enough data to reflect UDP length, drop.
348: */
1.96 itojun 349: ip_len = ntohs(ip->ip_len);
1.53 itojun 350: len = ntohs((u_int16_t)uh->uh_ulen);
1.96 itojun 351: if (ip_len != iphlen + len) {
352: if (ip_len < iphlen + len || len < sizeof(struct udphdr)) {
1.53 itojun 353: udpstat.udps_badlen++;
354: goto bad;
355: }
1.96 itojun 356: m_adj(m, iphlen + len - ip_len);
1.53 itojun 357: }
358:
359: /*
360: * Checksum extended UDP header and data.
361: */
1.129 ! yamt 362: if (udp4_input_checksum(m, uh, iphlen, len))
! 363: goto badcsum;
1.53 itojun 364:
365: /* construct source and dst sockaddrs. */
366: bzero(&src, sizeof(src));
367: src.sin_family = AF_INET;
368: src.sin_len = sizeof(struct sockaddr_in);
369: bcopy(&ip->ip_src, &src.sin_addr, sizeof(src.sin_addr));
370: src.sin_port = uh->uh_sport;
371: bzero(&dst, sizeof(dst));
372: dst.sin_family = AF_INET;
373: dst.sin_len = sizeof(struct sockaddr_in);
374: bcopy(&ip->ip_dst, &dst.sin_addr, sizeof(dst.sin_addr));
375: dst.sin_port = uh->uh_dport;
376:
377: n = udp4_realinput(&src, &dst, m, iphlen);
378: #ifdef INET6
379: if (IN_MULTICAST(ip->ip_dst.s_addr) || n == 0) {
380: struct sockaddr_in6 src6, dst6;
381:
382: bzero(&src6, sizeof(src6));
383: src6.sin6_family = AF_INET6;
384: src6.sin6_len = sizeof(struct sockaddr_in6);
385: src6.sin6_addr.s6_addr[10] = src6.sin6_addr.s6_addr[11] = 0xff;
386: bcopy(&ip->ip_src, &src6.sin6_addr.s6_addr[12],
387: sizeof(ip->ip_src));
388: src6.sin6_port = uh->uh_sport;
389: bzero(&dst6, sizeof(dst6));
390: dst6.sin6_family = AF_INET6;
391: dst6.sin6_len = sizeof(struct sockaddr_in6);
392: dst6.sin6_addr.s6_addr[10] = dst6.sin6_addr.s6_addr[11] = 0xff;
393: bcopy(&ip->ip_dst, &dst6.sin6_addr.s6_addr[12],
394: sizeof(ip->ip_dst));
395: dst6.sin6_port = uh->uh_dport;
396:
397: n += udp6_realinput(AF_INET, &src6, &dst6, m, iphlen);
398: }
399: #endif
400:
401: if (n == 0) {
402: if (m->m_flags & (M_BCAST | M_MCAST)) {
403: udpstat.udps_noportbcast++;
404: goto bad;
405: }
1.61 itojun 406: udpstat.udps_noport++;
1.64 ws 407: #ifdef IPKDB
1.53 itojun 408: if (checkipkdb(&ip->ip_src, uh->uh_sport, uh->uh_dport,
409: m, iphlen + sizeof(struct udphdr),
410: m->m_pkthdr.len - iphlen - sizeof(struct udphdr))) {
411: /*
412: * It was a debugger connect packet,
413: * just drop it now
414: */
415: goto bad;
416: }
417: #endif
418: icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0);
419: m = NULL;
420: }
421:
422: bad:
423: if (m)
424: m_freem(m);
1.78 thorpej 425: return;
426:
427: badcsum:
428: m_freem(m);
1.53 itojun 429: }
1.72 itojun 430: #endif
1.53 itojun 431:
432: #ifdef INET6
1.129 ! yamt 433: static int
! 434: udp6_input_checksum(struct mbuf *m, const struct udphdr *uh, int off, int len)
! 435: {
! 436:
! 437: if (__predict_false((m->m_flags & M_LOOP) && !udp_do_loopback_cksum)) {
! 438: goto good;
! 439: }
! 440: if (uh->uh_sum == 0) {
! 441: udp6stat.udp6s_nosum++;
! 442: goto bad;
! 443: }
! 444: if (in6_cksum(m, IPPROTO_UDP, off, len) != 0) {
! 445: udp6stat.udp6s_badsum++;
! 446: goto bad;
! 447: }
! 448:
! 449: good:
! 450: return 0;
! 451: bad:
! 452: return -1;
! 453: }
! 454:
1.53 itojun 455: int
1.119 matt 456: udp6_input(struct mbuf **mp, int *offp, int proto)
1.53 itojun 457: {
458: struct mbuf *m = *mp;
459: int off = *offp;
460: struct sockaddr_in6 src, dst;
461: struct ip6_hdr *ip6;
462: struct udphdr *uh;
463: u_int32_t plen, ulen;
464:
1.76 itojun 465: ip6 = mtod(m, struct ip6_hdr *);
466:
1.53 itojun 467: #if defined(NFAITH) && 0 < NFAITH
1.76 itojun 468: if (faithprefix(&ip6->ip6_dst)) {
469: /* send icmp6 host unreach? */
470: m_freem(m);
471: return IPPROTO_DONE;
1.53 itojun 472: }
473: #endif
474:
475: udp6stat.udp6s_ipackets++;
476:
477: /* check for jumbogram is done in ip6_input. we can trust pkthdr.len */
478: plen = m->m_pkthdr.len - off;
479: IP6_EXTHDR_GET(uh, struct udphdr *, m, off, sizeof(struct udphdr));
480: if (uh == NULL) {
481: ip6stat.ip6s_tooshort++;
482: return IPPROTO_DONE;
483: }
1.95 thorpej 484: KASSERT(UDP_HDR_ALIGNED_P(uh));
1.53 itojun 485: ulen = ntohs((u_short)uh->uh_ulen);
1.69 itojun 486: /*
487: * RFC2675 section 4: jumbograms will have 0 in the UDP header field,
488: * iff payload length > 0xffff.
489: */
1.53 itojun 490: if (ulen == 0 && plen > 0xffff)
491: ulen = plen;
492:
493: if (plen != ulen) {
494: udp6stat.udp6s_badlen++;
1.54 itojun 495: goto bad;
496: }
497:
1.57 itojun 498: /* destination port of 0 is illegal, based on RFC768. */
499: if (uh->uh_dport == 0)
500: goto bad;
501:
1.54 itojun 502: /* Be proactive about malicious use of IPv4 mapped address */
503: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
504: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
505: /* XXX stat */
1.53 itojun 506: goto bad;
507: }
508:
509: /*
1.125 thorpej 510: * Checksum extended UDP header and data. Maybe skip checksum
511: * on loopback interfaces.
1.53 itojun 512: */
1.129 ! yamt 513: if (udp6_input_checksum(m, uh, off, ulen))
! 514: goto bad;
1.53 itojun 515:
516: /*
517: * Construct source and dst sockaddrs.
518: * Note that ifindex (s6_addr16[1]) is already filled.
519: */
520: bzero(&src, sizeof(src));
521: src.sin6_family = AF_INET6;
522: src.sin6_len = sizeof(struct sockaddr_in6);
1.69 itojun 523: /* KAME hack: recover scopeid */
524: (void)in6_recoverscope(&src, &ip6->ip6_src, m->m_pkthdr.rcvif);
1.53 itojun 525: src.sin6_port = uh->uh_sport;
526: bzero(&dst, sizeof(dst));
527: dst.sin6_family = AF_INET6;
528: dst.sin6_len = sizeof(struct sockaddr_in6);
1.69 itojun 529: /* KAME hack: recover scopeid */
530: (void)in6_recoverscope(&dst, &ip6->ip6_dst, m->m_pkthdr.rcvif);
1.53 itojun 531: dst.sin6_port = uh->uh_dport;
532:
533: if (udp6_realinput(AF_INET6, &src, &dst, m, off) == 0) {
534: if (m->m_flags & M_MCAST) {
535: udp6stat.udp6s_noportmcast++;
536: goto bad;
537: }
1.61 itojun 538: udp6stat.udp6s_noport++;
1.53 itojun 539: icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0);
540: m = NULL;
541: }
542:
543: bad:
544: if (m)
545: m_freem(m);
546: return IPPROTO_DONE;
547: }
548: #endif
549:
1.72 itojun 550: #ifdef INET
1.53 itojun 551: static void
1.119 matt 552: udp4_sendup(struct mbuf *m, int off /* offset of data portion */,
553: struct sockaddr *src, struct socket *so)
1.53 itojun 554: {
555: struct mbuf *opts = NULL;
556: struct mbuf *n;
557: struct inpcb *inp = NULL;
558:
559: if (!so)
560: return;
561: switch (so->so_proto->pr_domain->dom_family) {
562: case AF_INET:
563: inp = sotoinpcb(so);
564: break;
565: #ifdef INET6
566: case AF_INET6:
567: break;
568: #endif
569: default:
570: return;
571: }
572:
1.105 jonathan 573: #if defined(IPSEC) || defined(FAST_IPSEC)
1.53 itojun 574: /* check AH/ESP integrity. */
575: if (so != NULL && ipsec4_in_reject_so(m, so)) {
576: ipsecstat.in_polvio++;
1.110 itojun 577: if ((n = m_copy(m, 0, M_COPYALL)) != NULL)
578: icmp_error(n, ICMP_UNREACH, ICMP_UNREACH_ADMIN_PROHIBIT,
579: 0, 0);
1.53 itojun 580: return;
581: }
582: #endif /*IPSEC*/
583:
584: if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
585: if (inp && (inp->inp_flags & INP_CONTROLOPTS
586: || so->so_options & SO_TIMESTAMP)) {
587: struct ip *ip = mtod(n, struct ip *);
588: ip_savecontrol(inp, &opts, ip, n);
589: }
590:
591: m_adj(n, off);
592: if (sbappendaddr(&so->so_rcv, src, n,
593: opts) == 0) {
594: m_freem(n);
595: if (opts)
596: m_freem(opts);
1.124 darrenr 597: so->so_rcv.sb_overflowed++;
1.81 enami 598: udpstat.udps_fullsock++;
1.53 itojun 599: } else
600: sorwakeup(so);
601: }
602: }
1.72 itojun 603: #endif
1.53 itojun 604:
605: #ifdef INET6
606: static void
1.119 matt 607: udp6_sendup(struct mbuf *m, int off /* offset of data portion */,
608: struct sockaddr *src, struct socket *so)
1.53 itojun 609: {
610: struct mbuf *opts = NULL;
611: struct mbuf *n;
612: struct in6pcb *in6p = NULL;
613:
614: if (!so)
615: return;
616: if (so->so_proto->pr_domain->dom_family != AF_INET6)
617: return;
618: in6p = sotoin6pcb(so);
619:
1.105 jonathan 620: #if defined(IPSEC) || defined(FAST_IPSEC)
1.53 itojun 621: /* check AH/ESP integrity. */
622: if (so != NULL && ipsec6_in_reject_so(m, so)) {
623: ipsec6stat.in_polvio++;
1.111 mycroft 624: if ((n = m_copy(m, 0, M_COPYALL)) != NULL)
1.110 itojun 625: icmp6_error(n, ICMP6_DST_UNREACH,
626: ICMP6_DST_UNREACH_ADMIN, 0);
1.53 itojun 627: return;
628: }
629: #endif /*IPSEC*/
630:
631: if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
632: if (in6p && (in6p->in6p_flags & IN6P_CONTROLOPTS
633: || in6p->in6p_socket->so_options & SO_TIMESTAMP)) {
634: struct ip6_hdr *ip6 = mtod(n, struct ip6_hdr *);
635: ip6_savecontrol(in6p, &opts, ip6, n);
636: }
637:
638: m_adj(n, off);
639: if (sbappendaddr(&so->so_rcv, src, n, opts) == 0) {
640: m_freem(n);
641: if (opts)
642: m_freem(opts);
1.124 darrenr 643: so->so_rcv.sb_overflowed++;
1.53 itojun 644: udp6stat.udp6s_fullsock++;
645: } else
646: sorwakeup(so);
647: }
648: }
649: #endif
650:
1.72 itojun 651: #ifdef INET
1.53 itojun 652: static int
1.119 matt 653: udp4_realinput(struct sockaddr_in *src, struct sockaddr_in *dst,
654: struct mbuf *m, int off /* offset of udphdr */)
1.53 itojun 655: {
656: u_int16_t *sport, *dport;
657: int rcvcnt;
658: struct in_addr *src4, *dst4;
1.109 itojun 659: struct inpcb_hdr *inph;
1.53 itojun 660: struct inpcb *inp;
661:
662: rcvcnt = 0;
663: off += sizeof(struct udphdr); /* now, offset of payload */
664:
665: if (src->sin_family != AF_INET || dst->sin_family != AF_INET)
666: goto bad;
667:
668: src4 = &src->sin_addr;
669: sport = &src->sin_port;
670: dst4 = &dst->sin_addr;
671: dport = &dst->sin_port;
672:
1.73 itojun 673: if (IN_MULTICAST(dst4->s_addr) ||
1.53 itojun 674: in_broadcast(*dst4, m->m_pkthdr.rcvif)) {
675: /*
676: * Deliver a multicast or broadcast datagram to *all* sockets
677: * for which the local and remote addresses and ports match
678: * those of the incoming datagram. This allows more than
679: * one process to receive multi/broadcasts on the same port.
680: * (This really ought to be done for unicast datagrams as
681: * well, but that would cause problems with existing
682: * applications that open both address-specific sockets and
683: * a wildcard socket listening to the same port -- they would
684: * end up receiving duplicates of every unicast datagram.
685: * Those applications open the multiple sockets to overcome an
686: * inadequacy of the UDP socket interface, but for backwards
687: * compatibility we avoid the problem here rather than
688: * fixing the interface. Maybe 4.5BSD will remedy this?)
689: */
690:
691: /*
1.92 itojun 692: * KAME note: traditionally we dropped udpiphdr from mbuf here.
1.71 itojun 693: * we need udpiphdr for IPsec processing so we do that later.
1.53 itojun 694: */
695: /*
696: * Locate pcb(s) for datagram.
697: */
1.109 itojun 698: CIRCLEQ_FOREACH(inph, &udbtable.inpt_queue, inph_queue) {
699: inp = (struct inpcb *)inph;
700: if (inp->inp_af != AF_INET)
701: continue;
702:
1.53 itojun 703: if (inp->inp_lport != *dport)
704: continue;
705: if (!in_nullhost(inp->inp_laddr)) {
706: if (!in_hosteq(inp->inp_laddr, *dst4))
707: continue;
708: }
709: if (!in_nullhost(inp->inp_faddr)) {
710: if (!in_hosteq(inp->inp_faddr, *src4) ||
711: inp->inp_fport != *sport)
712: continue;
713: }
714:
715: udp4_sendup(m, off, (struct sockaddr *)src,
716: inp->inp_socket);
717: rcvcnt++;
718:
719: /*
720: * Don't look for additional matches if this one does
721: * not have either the SO_REUSEPORT or SO_REUSEADDR
722: * socket options set. This heuristic avoids searching
723: * through all pcbs in the common case of a non-shared
724: * port. It assumes that an application will never
725: * clear these options after setting them.
726: */
727: if ((inp->inp_socket->so_options &
728: (SO_REUSEPORT|SO_REUSEADDR)) == 0)
729: break;
730: }
731: } else {
732: /*
733: * Locate pcb for datagram.
734: */
735: inp = in_pcblookup_connect(&udbtable, *src4, *sport, *dst4, *dport);
736: if (inp == 0) {
737: ++udpstat.udps_pcbhashmiss;
738: inp = in_pcblookup_bind(&udbtable, *dst4, *dport);
1.82 itojun 739: if (inp == 0)
1.53 itojun 740: return rcvcnt;
741: }
742:
743: udp4_sendup(m, off, (struct sockaddr *)src, inp->inp_socket);
744: rcvcnt++;
745: }
746:
747: bad:
748: return rcvcnt;
749: }
1.72 itojun 750: #endif
1.53 itojun 751:
752: #ifdef INET6
753: static int
1.119 matt 754: udp6_realinput(int af, struct sockaddr_in6 *src, struct sockaddr_in6 *dst,
755: struct mbuf *m, int off)
1.53 itojun 756: {
1.79 itojun 757: u_int16_t sport, dport;
1.53 itojun 758: int rcvcnt;
1.79 itojun 759: struct in6_addr src6, dst6;
760: const struct in_addr *dst4;
1.109 itojun 761: struct inpcb_hdr *inph;
1.53 itojun 762: struct in6pcb *in6p;
763:
764: rcvcnt = 0;
765: off += sizeof(struct udphdr); /* now, offset of payload */
766:
767: if (af != AF_INET && af != AF_INET6)
768: goto bad;
769: if (src->sin6_family != AF_INET6 || dst->sin6_family != AF_INET6)
770: goto bad;
771:
1.79 itojun 772: in6_embedscope(&src6, src, NULL, NULL);
773: sport = src->sin6_port;
774: in6_embedscope(&dst6, dst, NULL, NULL);
775: dport = dst->sin6_port;
1.88 itojun 776: dst4 = (struct in_addr *)&dst->sin6_addr.s6_addr[12];
1.53 itojun 777:
1.79 itojun 778: if (IN6_IS_ADDR_MULTICAST(&dst6) ||
779: (af == AF_INET && IN_MULTICAST(dst4->s_addr))) {
1.53 itojun 780: /*
781: * Deliver a multicast or broadcast datagram to *all* sockets
782: * for which the local and remote addresses and ports match
783: * those of the incoming datagram. This allows more than
784: * one process to receive multi/broadcasts on the same port.
785: * (This really ought to be done for unicast datagrams as
786: * well, but that would cause problems with existing
787: * applications that open both address-specific sockets and
788: * a wildcard socket listening to the same port -- they would
789: * end up receiving duplicates of every unicast datagram.
790: * Those applications open the multiple sockets to overcome an
791: * inadequacy of the UDP socket interface, but for backwards
792: * compatibility we avoid the problem here rather than
793: * fixing the interface. Maybe 4.5BSD will remedy this?)
794: */
795:
796: /*
1.92 itojun 797: * KAME note: traditionally we dropped udpiphdr from mbuf here.
1.71 itojun 798: * we need udpiphdr for IPsec processing so we do that later.
1.53 itojun 799: */
800: /*
801: * Locate pcb(s) for datagram.
802: */
1.109 itojun 803: CIRCLEQ_FOREACH(inph, &udbtable.inpt_queue, inph_queue) {
804: in6p = (struct in6pcb *)inph;
805: if (in6p->in6p_af != AF_INET6)
806: continue;
807:
1.79 itojun 808: if (in6p->in6p_lport != dport)
1.53 itojun 809: continue;
810: if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) {
1.90 itojun 811: if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &dst6))
1.53 itojun 812: continue;
1.92 itojun 813: } else {
1.79 itojun 814: if (IN6_IS_ADDR_V4MAPPED(&dst6) &&
1.85 itojun 815: (in6p->in6p_flags & IN6P_IPV6_V6ONLY))
1.55 itojun 816: continue;
817: }
1.53 itojun 818: if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
1.79 itojun 819: if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr,
820: &src6) || in6p->in6p_fport != sport)
1.53 itojun 821: continue;
1.92 itojun 822: } else {
1.79 itojun 823: if (IN6_IS_ADDR_V4MAPPED(&src6) &&
1.85 itojun 824: (in6p->in6p_flags & IN6P_IPV6_V6ONLY))
1.55 itojun 825: continue;
826: }
1.53 itojun 827:
828: udp6_sendup(m, off, (struct sockaddr *)src,
829: in6p->in6p_socket);
830: rcvcnt++;
831:
832: /*
833: * Don't look for additional matches if this one does
834: * not have either the SO_REUSEPORT or SO_REUSEADDR
835: * socket options set. This heuristic avoids searching
836: * through all pcbs in the common case of a non-shared
837: * port. It assumes that an application will never
838: * clear these options after setting them.
839: */
840: if ((in6p->in6p_socket->so_options &
841: (SO_REUSEPORT|SO_REUSEADDR)) == 0)
842: break;
843: }
844: } else {
845: /*
846: * Locate pcb for datagram.
847: */
1.109 itojun 848: in6p = in6_pcblookup_connect(&udbtable, &src6, sport,
1.79 itojun 849: &dst6, dport, 0);
1.53 itojun 850: if (in6p == 0) {
851: ++udpstat.udps_pcbhashmiss;
1.109 itojun 852: in6p = in6_pcblookup_bind(&udbtable, &dst6, dport, 0);
1.82 itojun 853: if (in6p == 0)
1.53 itojun 854: return rcvcnt;
855: }
856:
857: udp6_sendup(m, off, (struct sockaddr *)src, in6p->in6p_socket);
858: rcvcnt++;
859: }
860:
861: bad:
862: return rcvcnt;
863: }
864: #endif
1.1 cgd 865:
1.72 itojun 866: #ifdef INET
1.1 cgd 867: /*
868: * Notify a udp user of an asynchronous error;
869: * just wake up so that he can collect error status.
870: */
1.7 mycroft 871: static void
1.119 matt 872: udp_notify(struct inpcb *inp, int errno)
1.1 cgd 873: {
874: inp->inp_socket->so_error = errno;
875: sorwakeup(inp->inp_socket);
876: sowwakeup(inp->inp_socket);
877: }
878:
1.27 christos 879: void *
1.119 matt 880: udp_ctlinput(int cmd, struct sockaddr *sa, void *v)
1.1 cgd 881: {
1.66 augustss 882: struct ip *ip = v;
883: struct udphdr *uh;
1.119 matt 884: void (*notify)(struct inpcb *, int) = udp_notify;
1.21 mycroft 885: int errno;
1.1 cgd 886:
1.53 itojun 887: if (sa->sa_family != AF_INET
888: || sa->sa_len != sizeof(struct sockaddr_in))
1.51 itojun 889: return NULL;
1.20 mycroft 890: if ((unsigned)cmd >= PRC_NCMDS)
1.27 christos 891: return NULL;
1.20 mycroft 892: errno = inetctlerrmap[cmd];
1.18 mycroft 893: if (PRC_IS_REDIRECT(cmd))
1.19 mycroft 894: notify = in_rtchange, ip = 0;
1.18 mycroft 895: else if (cmd == PRC_HOSTDEAD)
1.19 mycroft 896: ip = 0;
1.23 cgd 897: else if (errno == 0)
1.27 christos 898: return NULL;
1.19 mycroft 899: if (ip) {
1.1 cgd 900: uh = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2));
1.34 mycroft 901: in_pcbnotify(&udbtable, satosin(sa)->sin_addr, uh->uh_dport,
902: ip->ip_src, uh->uh_sport, errno, notify);
1.53 itojun 903:
904: /* XXX mapped address case */
1.19 mycroft 905: } else
1.34 mycroft 906: in_pcbnotifyall(&udbtable, satosin(sa)->sin_addr, errno,
907: notify);
1.27 christos 908: return NULL;
1.1 cgd 909: }
910:
1.7 mycroft 911: int
1.27 christos 912: udp_output(struct mbuf *m, ...)
913: {
1.66 augustss 914: struct inpcb *inp;
915: struct udpiphdr *ui;
1.125 thorpej 916: struct route *ro;
1.66 augustss 917: int len = m->m_pkthdr.len;
1.31 mycroft 918: int error = 0;
1.27 christos 919: va_list ap;
920:
1.98 matt 921: MCLAIM(m, &udp_tx_mowner);
1.27 christos 922: va_start(ap, m);
923: inp = va_arg(ap, struct inpcb *);
924: va_end(ap);
1.1 cgd 925:
926: /*
927: * Calculate data length and get a mbuf
928: * for UDP and IP headers.
929: */
1.13 mycroft 930: M_PREPEND(m, sizeof(struct udpiphdr), M_DONTWAIT);
931: if (m == 0) {
932: error = ENOBUFS;
1.39 thorpej 933: goto release;
934: }
935:
936: /*
937: * Compute the packet length of the IP header, and
938: * punt if the length looks bogus.
939: */
1.96 itojun 940: if (len + sizeof(struct udpiphdr) > IP_MAXPACKET) {
1.39 thorpej 941: error = EMSGSIZE;
1.13 mycroft 942: goto release;
943: }
1.1 cgd 944:
945: /*
946: * Fill in mbuf with extended UDP header
947: * and addresses and length put into network format.
948: */
949: ui = mtod(m, struct udpiphdr *);
950: ui->ui_pr = IPPROTO_UDP;
951: ui->ui_src = inp->inp_laddr;
952: ui->ui_dst = inp->inp_faddr;
953: ui->ui_sport = inp->inp_lport;
954: ui->ui_dport = inp->inp_fport;
1.78 thorpej 955: ui->ui_ulen = htons((u_int16_t)len + sizeof(struct udphdr));
1.1 cgd 956:
1.125 thorpej 957: ro = &inp->inp_route;
958:
1.1 cgd 959: /*
1.78 thorpej 960: * Set up checksum and output datagram.
1.1 cgd 961: */
962: if (udpcksum) {
1.78 thorpej 963: /*
964: * XXX Cache pseudo-header checksum part for
965: * XXX "connected" UDP sockets.
1.125 thorpej 966: * Maybe skip checksums on loopback interfaces.
1.78 thorpej 967: */
968: ui->ui_sum = in_cksum_phdr(ui->ui_src.s_addr,
969: ui->ui_dst.s_addr, htons((u_int16_t)len +
970: sizeof(struct udphdr) + IPPROTO_UDP));
1.125 thorpej 971: if (__predict_true(ro->ro_rt == NULL ||
972: !(ro->ro_rt->rt_ifp->if_flags &
973: IFF_LOOPBACK) ||
974: udp_do_loopback_cksum))
975: m->m_pkthdr.csum_flags = M_CSUM_UDPv4;
976: else
977: m->m_pkthdr.csum_flags = 0;
1.78 thorpej 978: m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum);
979: } else
980: ui->ui_sum = 0;
1.96 itojun 981: ((struct ip *)ui)->ip_len = htons(sizeof (struct udpiphdr) + len);
1.1 cgd 982: ((struct ip *)ui)->ip_ttl = inp->inp_ip.ip_ttl; /* XXX */
983: ((struct ip *)ui)->ip_tos = inp->inp_ip.ip_tos; /* XXX */
984: udpstat.udps_opackets++;
1.48 itojun 985:
1.125 thorpej 986: return (ip_output(m, inp->inp_options, ro,
1.12 mycroft 987: inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST),
1.107 itojun 988: inp->inp_moptions, inp->inp_socket));
1.1 cgd 989:
990: release:
991: m_freem(m);
992: return (error);
993: }
994:
1.42 thorpej 995: int udp_sendspace = 9216; /* really max datagram size */
996: int udp_recvspace = 40 * (1024 + sizeof(struct sockaddr_in));
1.1 cgd 997: /* 40 1K datagrams */
998:
999: /*ARGSUSED*/
1.7 mycroft 1000: int
1.119 matt 1001: udp_usrreq(struct socket *so, int req, struct mbuf *m, struct mbuf *nam,
1002: struct mbuf *control, struct proc *p)
1.1 cgd 1003: {
1.66 augustss 1004: struct inpcb *inp;
1.1 cgd 1005: int s;
1.66 augustss 1006: int error = 0;
1.1 cgd 1007:
1008: if (req == PRU_CONTROL)
1.31 mycroft 1009: return (in_control(so, (long)m, (caddr_t)nam,
1.30 mycroft 1010: (struct ifnet *)control, p));
1.59 thorpej 1011:
1.60 thorpej 1012: if (req == PRU_PURGEIF) {
1.80 itojun 1013: in_pcbpurgeif0(&udbtable, (struct ifnet *)control);
1.60 thorpej 1014: in_purgeif((struct ifnet *)control);
1015: in_pcbpurgeif(&udbtable, (struct ifnet *)control);
1.59 thorpej 1016: return (0);
1017: }
1.31 mycroft 1018:
1019: s = splsoftnet();
1020: inp = sotoinpcb(so);
1.32 mycroft 1021: #ifdef DIAGNOSTIC
1022: if (req != PRU_SEND && req != PRU_SENDOOB && control)
1023: panic("udp_usrreq: unexpected control mbuf");
1024: #endif
1.31 mycroft 1025: if (inp == 0 && req != PRU_ATTACH) {
1026: error = EINVAL;
1027: goto release;
1028: }
1029:
1.1 cgd 1030: /*
1031: * Note: need to block udp_input while changing
1032: * the udp pcb queue and/or pcb addresses.
1033: */
1034: switch (req) {
1035:
1036: case PRU_ATTACH:
1.31 mycroft 1037: if (inp != 0) {
1038: error = EISCONN;
1.1 cgd 1039: break;
1040: }
1.98 matt 1041: #ifdef MBUFTRACE
1042: so->so_mowner = &udp_mowner;
1043: so->so_rcv.sb_mowner = &udp_rx_mowner;
1044: so->so_snd.sb_mowner = &udp_tx_mowner;
1045: #endif
1.31 mycroft 1046: if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
1047: error = soreserve(so, udp_sendspace, udp_recvspace);
1048: if (error)
1049: break;
1050: }
1.18 mycroft 1051: error = in_pcballoc(so, &udbtable);
1.1 cgd 1052: if (error)
1053: break;
1.31 mycroft 1054: inp = sotoinpcb(so);
1055: inp->inp_ip.ip_ttl = ip_defttl;
1.1 cgd 1056: break;
1057:
1058: case PRU_DETACH:
1.31 mycroft 1059: in_pcbdetach(inp);
1.1 cgd 1060: break;
1061:
1062: case PRU_BIND:
1.31 mycroft 1063: error = in_pcbbind(inp, nam, p);
1.1 cgd 1064: break;
1065:
1066: case PRU_LISTEN:
1067: error = EOPNOTSUPP;
1068: break;
1069:
1070: case PRU_CONNECT:
1.31 mycroft 1071: error = in_pcbconnect(inp, nam);
1072: if (error)
1.1 cgd 1073: break;
1.31 mycroft 1074: soisconnected(so);
1.1 cgd 1075: break;
1076:
1077: case PRU_CONNECT2:
1078: error = EOPNOTSUPP;
1079: break;
1080:
1081: case PRU_DISCONNECT:
1.31 mycroft 1082: /*soisdisconnected(so);*/
1083: so->so_state &= ~SS_ISCONNECTED; /* XXX */
1.1 cgd 1084: in_pcbdisconnect(inp);
1.34 mycroft 1085: inp->inp_laddr = zeroin_addr; /* XXX */
1.35 mycroft 1086: in_pcbstate(inp, INP_BOUND); /* XXX */
1.1 cgd 1087: break;
1088:
1089: case PRU_SHUTDOWN:
1090: socantsendmore(so);
1091: break;
1092:
1.31 mycroft 1093: case PRU_RCVD:
1094: error = EOPNOTSUPP;
1.1 cgd 1095: break;
1096:
1.31 mycroft 1097: case PRU_SEND:
1.32 mycroft 1098: if (control && control->m_len) {
1099: m_freem(control);
1100: m_freem(m);
1101: error = EINVAL;
1102: break;
1103: }
1.31 mycroft 1104: {
1.35 mycroft 1105: struct in_addr laddr; /* XXX */
1.1 cgd 1106:
1.31 mycroft 1107: if (nam) {
1.35 mycroft 1108: laddr = inp->inp_laddr; /* XXX */
1.31 mycroft 1109: if ((so->so_state & SS_ISCONNECTED) != 0) {
1110: error = EISCONN;
1.32 mycroft 1111: goto die;
1.31 mycroft 1112: }
1113: error = in_pcbconnect(inp, nam);
1.100 matt 1114: if (error)
1115: goto die;
1.31 mycroft 1116: } else {
1117: if ((so->so_state & SS_ISCONNECTED) == 0) {
1118: error = ENOTCONN;
1.32 mycroft 1119: goto die;
1.31 mycroft 1120: }
1121: }
1.33 mycroft 1122: error = udp_output(m, inp);
1.100 matt 1123: m = NULL;
1.31 mycroft 1124: if (nam) {
1125: in_pcbdisconnect(inp);
1.35 mycroft 1126: inp->inp_laddr = laddr; /* XXX */
1127: in_pcbstate(inp, INP_BOUND); /* XXX */
1.31 mycroft 1128: }
1.100 matt 1129: die:
1130: if (m)
1131: m_freem(m);
1.31 mycroft 1132: }
1.1 cgd 1133: break;
1134:
1135: case PRU_SENSE:
1136: /*
1137: * stat: don't bother with a blocksize.
1138: */
1.31 mycroft 1139: splx(s);
1.1 cgd 1140: return (0);
1141:
1.31 mycroft 1142: case PRU_RCVOOB:
1143: error = EOPNOTSUPP;
1144: break;
1145:
1.1 cgd 1146: case PRU_SENDOOB:
1.32 mycroft 1147: m_freem(control);
1.31 mycroft 1148: m_freem(m);
1.1 cgd 1149: error = EOPNOTSUPP;
1150: break;
1151:
1.31 mycroft 1152: case PRU_SOCKADDR:
1153: in_setsockaddr(inp, nam);
1154: break;
1155:
1156: case PRU_PEERADDR:
1157: in_setpeeraddr(inp, nam);
1158: break;
1.1 cgd 1159:
1160: default:
1161: panic("udp_usrreq");
1162: }
1163:
1164: release:
1.31 mycroft 1165: splx(s);
1.1 cgd 1166: return (error);
1.13 mycroft 1167: }
1168:
1169: /*
1170: * Sysctl for udp variables.
1171: */
1.114 atatat 1172: SYSCTL_SETUP(sysctl_net_inet_udp_setup, "sysctl net.inet.udp subtree setup")
1.13 mycroft 1173: {
1.114 atatat 1174:
1.116 atatat 1175: sysctl_createv(clog, 0, NULL, NULL,
1176: CTLFLAG_PERMANENT,
1.114 atatat 1177: CTLTYPE_NODE, "net", NULL,
1178: NULL, 0, NULL, 0,
1179: CTL_NET, CTL_EOL);
1.116 atatat 1180: sysctl_createv(clog, 0, NULL, NULL,
1181: CTLFLAG_PERMANENT,
1.114 atatat 1182: CTLTYPE_NODE, "inet", NULL,
1183: NULL, 0, NULL, 0,
1184: CTL_NET, PF_INET, CTL_EOL);
1.116 atatat 1185: sysctl_createv(clog, 0, NULL, NULL,
1186: CTLFLAG_PERMANENT,
1.122 atatat 1187: CTLTYPE_NODE, "udp",
1188: SYSCTL_DESCR("UDPv4 related settings"),
1.114 atatat 1189: NULL, 0, NULL, 0,
1190: CTL_NET, PF_INET, IPPROTO_UDP, CTL_EOL);
1191:
1.116 atatat 1192: sysctl_createv(clog, 0, NULL, NULL,
1193: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.122 atatat 1194: CTLTYPE_INT, "checksum",
1.123 heas 1195: SYSCTL_DESCR("Compute UDP checksums"),
1.114 atatat 1196: NULL, 0, &udpcksum, 0,
1197: CTL_NET, PF_INET, IPPROTO_UDP, UDPCTL_CHECKSUM,
1198: CTL_EOL);
1.116 atatat 1199: sysctl_createv(clog, 0, NULL, NULL,
1200: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.122 atatat 1201: CTLTYPE_INT, "sendspace",
1202: SYSCTL_DESCR("Default UDP send buffer size"),
1.114 atatat 1203: NULL, 0, &udp_sendspace, 0,
1204: CTL_NET, PF_INET, IPPROTO_UDP, UDPCTL_SENDSPACE,
1205: CTL_EOL);
1.116 atatat 1206: sysctl_createv(clog, 0, NULL, NULL,
1207: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.122 atatat 1208: CTLTYPE_INT, "recvspace",
1209: SYSCTL_DESCR("Default UDP receive buffer size"),
1.114 atatat 1210: NULL, 0, &udp_recvspace, 0,
1211: CTL_NET, PF_INET, IPPROTO_UDP, UDPCTL_RECVSPACE,
1212: CTL_EOL);
1.125 thorpej 1213: sysctl_createv(clog, 0, NULL, NULL,
1214: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1215: CTLTYPE_INT, "do_loopback_cksum",
1216: SYSCTL_DESCR("Perform UDP checksum on loopback"),
1217: NULL, 0, &udp_do_loopback_cksum, 0,
1218: CTL_NET, PF_INET, IPPROTO_UDP, UDPCTL_LOOPBACKCKSUM,
1219: CTL_EOL);
1.1 cgd 1220: }
1.72 itojun 1221: #endif
CVSweb <webmaster@jp.NetBSD.org>