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Annotation of src/sys/netinet/udp_usrreq.c, Revision 1.88

1.88    ! itojun      1: /*     $NetBSD: udp_usrreq.c,v 1.87 2001/10/29 07:02:34 simonb Exp $   */
1.48      itojun      2:
                      3: /*
                      4:  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
                      5:  * All rights reserved.
                      6:  *
                      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.
                     18:  *
                     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.
                     44:  * 3. All advertising materials mentioning features or use of this software
                     45:  *    must display the following acknowledgement:
                     46:  *     This product includes software developed by the University of
                     47:  *     California, Berkeley and its contributors.
                     48:  * 4. Neither the name of the University nor the names of its contributors
                     49:  *    may be used to endorse or promote products derived from this software
                     50:  *    without specific prior written permission.
                     51:  *
                     52:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     53:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     54:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     55:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     56:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     57:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     58:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     59:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     60:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     61:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     62:  * SUCH DAMAGE.
                     63:  *
1.44      thorpej    64:  *     @(#)udp_usrreq.c        8.6 (Berkeley) 5/23/95
1.1       cgd        65:  */
1.50      thorpej    66:
1.77      soda       67: #include "opt_inet.h"
1.50      thorpej    68: #include "opt_ipsec.h"
1.78      thorpej    69: #include "opt_inet_csum.h"
1.64      ws         70: #include "opt_ipkdb.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: #ifdef PULLDOWN_TEST
                    107: #ifndef INET6
                    108: /* always need ip6.h for IP6_EXTHDR_GET */
                    109: #include <netinet/ip6.h>
                    110: #endif
                    111: #endif
                    112:
1.76      itojun    113: #include "faith.h"
                    114: #if defined(NFAITH) && NFAITH > 0
                    115: #include <net/if_faith.h>
                    116: #endif
                    117:
1.27      christos  118: #include <machine/stdarg.h>
                    119:
1.48      itojun    120: #ifdef IPSEC
                    121: #include <netinet6/ipsec.h>
                    122: #include <netkey/key.h>
                    123: #endif /*IPSEC*/
                    124:
1.64      ws        125: #ifdef IPKDB
                    126: #include <ipkdb/ipkdb.h>
                    127: #endif
                    128:
1.8       mycroft   129: /*
                    130:  * UDP protocol implementation.
                    131:  * Per RFC 768, August, 1980.
                    132:  */
                    133: #ifndef        COMPAT_42
                    134: int    udpcksum = 1;
                    135: #else
                    136: int    udpcksum = 0;           /* XXX */
                    137: #endif
                    138:
1.72      itojun    139: #ifdef INET
1.53      itojun    140: static void udp4_sendup __P((struct mbuf *, int, struct sockaddr *,
                    141:        struct socket *));
                    142: static int udp4_realinput __P((struct sockaddr_in *, struct sockaddr_in *,
                    143:        struct mbuf *, int));
1.72      itojun    144: #endif
1.53      itojun    145: #ifdef INET6
                    146: static void udp6_sendup __P((struct mbuf *, int, struct sockaddr *,
                    147:        struct socket *));
                    148: static int in6_mcmatch __P((struct in6pcb *, struct in6_addr *,
                    149:        struct ifnet *));
                    150: static int udp6_realinput __P((int, struct sockaddr_in6 *,
                    151:        struct sockaddr_in6 *, struct mbuf *, int));
                    152: #endif
1.72      itojun    153: #ifdef INET
1.13      mycroft   154: static void udp_notify __P((struct inpcb *, int));
1.72      itojun    155: #endif
1.7       mycroft   156:
1.26      mycroft   157: #ifndef UDBHASHSIZE
                    158: #define        UDBHASHSIZE     128
                    159: #endif
                    160: int    udbhashsize = UDBHASHSIZE;
                    161:
1.78      thorpej   162: #ifdef UDP_CSUM_COUNTERS
                    163: #include <sys/device.h>
                    164:
                    165: struct evcnt udp_hwcsum_bad = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
                    166:     NULL, "udp", "hwcsum bad");
                    167: struct evcnt udp_hwcsum_ok = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
                    168:     NULL, "udp", "hwcsum ok");
                    169: struct evcnt udp_hwcsum_data = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
                    170:     NULL, "udp", "hwcsum data");
                    171: struct evcnt udp_swcsum = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
                    172:     NULL, "udp", "swcsum");
                    173:
                    174: #define        UDP_CSUM_COUNTER_INCR(ev)       (ev)->ev_count++
                    175:
                    176: #else
                    177:
                    178: #define        UDP_CSUM_COUNTER_INCR(ev)       /* nothing */
                    179:
                    180: #endif /* UDP_CSUM_COUNTERS */
                    181:
1.7       mycroft   182: void
1.1       cgd       183: udp_init()
                    184: {
1.18      mycroft   185:
1.72      itojun    186: #ifdef INET
1.35      mycroft   187:        in_pcbinit(&udbtable, udbhashsize, udbhashsize);
1.72      itojun    188: #endif
1.78      thorpej   189:
                    190: #ifdef UDP_CSUM_COUNTERS
                    191:        evcnt_attach_static(&udp_hwcsum_bad);
                    192:        evcnt_attach_static(&udp_hwcsum_ok);
                    193:        evcnt_attach_static(&udp_hwcsum_data);
                    194:        evcnt_attach_static(&udp_swcsum);
                    195: #endif /* UDP_CSUM_COUNTERS */
1.1       cgd       196: }
                    197:
1.72      itojun    198: #ifdef INET
1.7       mycroft   199: void
1.27      christos  200: #if __STDC__
                    201: udp_input(struct mbuf *m, ...)
                    202: #else
                    203: udp_input(m, va_alist)
                    204:        struct mbuf *m;
                    205:        va_dcl
                    206: #endif
1.1       cgd       207: {
1.53      itojun    208:        va_list ap;
                    209:        struct sockaddr_in src, dst;
                    210:        struct ip *ip;
                    211:        struct udphdr *uh;
                    212:        int iphlen, proto;
                    213:        int len;
                    214:        int n;
                    215:
                    216:        va_start(ap, m);
                    217:        iphlen = va_arg(ap, int);
                    218:        proto = va_arg(ap, int);
                    219:        va_end(ap);
                    220:
                    221:        udpstat.udps_ipackets++;
                    222:
                    223: #ifndef PULLDOWN_TEST
                    224:        /*
                    225:         * Strip IP options, if any; should skip this,
                    226:         * make available to user, and use on returned packets,
                    227:         * but we don't yet have a way to check the checksum
                    228:         * with options still present.
                    229:         */
                    230:        if (iphlen > sizeof (struct ip)) {
                    231:                ip_stripoptions(m, (struct mbuf *)0);
                    232:                iphlen = sizeof(struct ip);
                    233:        }
                    234: #else
                    235:        /*
                    236:         * we may enable the above code if we save and pass IPv4 options
                    237:         * to the userland.
                    238:         */
                    239: #endif
                    240:
                    241:        /*
                    242:         * Get IP and UDP header together in first mbuf.
                    243:         */
                    244:        ip = mtod(m, struct ip *);
                    245: #ifndef PULLDOWN_TEST
                    246:        if (m->m_len < iphlen + sizeof(struct udphdr)) {
                    247:                if ((m = m_pullup(m, iphlen + sizeof(struct udphdr))) == 0) {
                    248:                        udpstat.udps_hdrops++;
                    249:                        return;
                    250:                }
                    251:                ip = mtod(m, struct ip *);
                    252:        }
                    253:        uh = (struct udphdr *)((caddr_t)ip + iphlen);
                    254: #else
                    255:        IP6_EXTHDR_GET(uh, struct udphdr *, m, iphlen, sizeof(struct udphdr));
                    256:        if (uh == NULL) {
                    257:                udpstat.udps_hdrops++;
                    258:                return;
                    259:        }
                    260: #endif
                    261:
1.57      itojun    262:        /* destination port of 0 is illegal, based on RFC768. */
                    263:        if (uh->uh_dport == 0)
                    264:                goto bad;
                    265:
1.53      itojun    266:        /*
                    267:         * Make mbuf data length reflect UDP length.
                    268:         * If not enough data to reflect UDP length, drop.
                    269:         */
                    270:        len = ntohs((u_int16_t)uh->uh_ulen);
                    271:        if (ip->ip_len != iphlen + len) {
1.70      sommerfe  272:                if (ip->ip_len < iphlen + len || len < sizeof(struct udphdr)) {
1.53      itojun    273:                        udpstat.udps_badlen++;
                    274:                        goto bad;
                    275:                }
                    276:                m_adj(m, iphlen + len - ip->ip_len);
                    277:        }
                    278:
                    279:        /*
                    280:         * Checksum extended UDP header and data.
                    281:         */
                    282:        if (uh->uh_sum) {
1.78      thorpej   283:                switch (m->m_pkthdr.csum_flags &
1.84      thorpej   284:                        ((m->m_pkthdr.rcvif->if_csum_flags_rx & M_CSUM_UDPv4) |
1.78      thorpej   285:                         M_CSUM_TCP_UDP_BAD | M_CSUM_DATA)) {
                    286:                case M_CSUM_UDPv4|M_CSUM_TCP_UDP_BAD:
                    287:                        UDP_CSUM_COUNTER_INCR(&udp_hwcsum_bad);
                    288:                        goto badcsum;
                    289:
                    290:                case M_CSUM_UDPv4|M_CSUM_DATA:
                    291:                        UDP_CSUM_COUNTER_INCR(&udp_hwcsum_data);
                    292:                        if ((m->m_pkthdr.csum_data ^ 0xffff) != 0)
                    293:                                goto badcsum;
                    294:                        break;
                    295:
                    296:                case M_CSUM_UDPv4:
                    297:                        /* Checksum was okay. */
                    298:                        UDP_CSUM_COUNTER_INCR(&udp_hwcsum_ok);
                    299:                        break;
                    300:
                    301:                default:
                    302:                        /* Need to compute it ourselves. */
                    303:                        UDP_CSUM_COUNTER_INCR(&udp_swcsum);
                    304:                        if (in4_cksum(m, IPPROTO_UDP, iphlen, len) != 0)
                    305:                                goto badcsum;
                    306:                        break;
1.53      itojun    307:                }
                    308:        }
                    309:
                    310:        /* construct source and dst sockaddrs. */
                    311:        bzero(&src, sizeof(src));
                    312:        src.sin_family = AF_INET;
                    313:        src.sin_len = sizeof(struct sockaddr_in);
                    314:        bcopy(&ip->ip_src, &src.sin_addr, sizeof(src.sin_addr));
                    315:        src.sin_port = uh->uh_sport;
                    316:        bzero(&dst, sizeof(dst));
                    317:        dst.sin_family = AF_INET;
                    318:        dst.sin_len = sizeof(struct sockaddr_in);
                    319:        bcopy(&ip->ip_dst, &dst.sin_addr, sizeof(dst.sin_addr));
                    320:        dst.sin_port = uh->uh_dport;
                    321:
                    322:        n = udp4_realinput(&src, &dst, m, iphlen);
                    323: #ifdef INET6
                    324:        if (IN_MULTICAST(ip->ip_dst.s_addr) || n == 0) {
                    325:                struct sockaddr_in6 src6, dst6;
                    326:
                    327:                bzero(&src6, sizeof(src6));
                    328:                src6.sin6_family = AF_INET6;
                    329:                src6.sin6_len = sizeof(struct sockaddr_in6);
                    330:                src6.sin6_addr.s6_addr[10] = src6.sin6_addr.s6_addr[11] = 0xff;
                    331:                bcopy(&ip->ip_src, &src6.sin6_addr.s6_addr[12],
                    332:                        sizeof(ip->ip_src));
                    333:                src6.sin6_port = uh->uh_sport;
                    334:                bzero(&dst6, sizeof(dst6));
                    335:                dst6.sin6_family = AF_INET6;
                    336:                dst6.sin6_len = sizeof(struct sockaddr_in6);
                    337:                dst6.sin6_addr.s6_addr[10] = dst6.sin6_addr.s6_addr[11] = 0xff;
                    338:                bcopy(&ip->ip_dst, &dst6.sin6_addr.s6_addr[12],
                    339:                        sizeof(ip->ip_dst));
                    340:                dst6.sin6_port = uh->uh_dport;
                    341:
                    342:                n += udp6_realinput(AF_INET, &src6, &dst6, m, iphlen);
                    343:        }
                    344: #endif
                    345:
                    346:        if (n == 0) {
                    347:                if (m->m_flags & (M_BCAST | M_MCAST)) {
                    348:                        udpstat.udps_noportbcast++;
                    349:                        goto bad;
                    350:                }
1.61      itojun    351:                udpstat.udps_noport++;
1.64      ws        352: #ifdef IPKDB
1.53      itojun    353:                if (checkipkdb(&ip->ip_src, uh->uh_sport, uh->uh_dport,
                    354:                                m, iphlen + sizeof(struct udphdr),
                    355:                                m->m_pkthdr.len - iphlen - sizeof(struct udphdr))) {
                    356:                        /*
                    357:                         * It was a debugger connect packet,
                    358:                         * just drop it now
                    359:                         */
                    360:                        goto bad;
                    361:                }
                    362: #endif
                    363:                icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0);
                    364:                m = NULL;
                    365:        }
                    366:
                    367: bad:
                    368:        if (m)
                    369:                m_freem(m);
1.78      thorpej   370:        return;
                    371:
                    372: badcsum:
                    373:        m_freem(m);
                    374:        udpstat.udps_badsum++;
1.53      itojun    375: }
1.72      itojun    376: #endif
1.53      itojun    377:
                    378: #ifdef INET6
                    379: int
                    380: udp6_input(mp, offp, proto)
                    381:        struct mbuf **mp;
                    382:        int *offp, proto;
                    383: {
                    384:        struct mbuf *m = *mp;
                    385:        int off = *offp;
                    386:        struct sockaddr_in6 src, dst;
                    387:        struct ip6_hdr *ip6;
                    388:        struct udphdr *uh;
                    389:        u_int32_t plen, ulen;
                    390:
1.76      itojun    391: #ifndef PULLDOWN_TEST
                    392:        IP6_EXTHDR_CHECK(m, off, sizeof(struct udphdr), IPPROTO_DONE);
                    393: #endif
                    394:        ip6 = mtod(m, struct ip6_hdr *);
                    395:
1.53      itojun    396: #if defined(NFAITH) && 0 < NFAITH
1.76      itojun    397:        if (faithprefix(&ip6->ip6_dst)) {
                    398:                /* send icmp6 host unreach? */
                    399:                m_freem(m);
                    400:                return IPPROTO_DONE;
1.53      itojun    401:        }
                    402: #endif
                    403:
                    404:        udp6stat.udp6s_ipackets++;
                    405:
                    406:        /* check for jumbogram is done in ip6_input.  we can trust pkthdr.len */
                    407:        plen = m->m_pkthdr.len - off;
                    408: #ifndef PULLDOWN_TEST
                    409:        uh = (struct udphdr *)((caddr_t)ip6 + off);
                    410: #else
                    411:        IP6_EXTHDR_GET(uh, struct udphdr *, m, off, sizeof(struct udphdr));
                    412:        if (uh == NULL) {
                    413:                ip6stat.ip6s_tooshort++;
                    414:                return IPPROTO_DONE;
                    415:        }
                    416: #endif
                    417:        ulen = ntohs((u_short)uh->uh_ulen);
1.69      itojun    418:        /*
                    419:         * RFC2675 section 4: jumbograms will have 0 in the UDP header field,
                    420:         * iff payload length > 0xffff.
                    421:         */
1.53      itojun    422:        if (ulen == 0 && plen > 0xffff)
                    423:                ulen = plen;
                    424:
                    425:        if (plen != ulen) {
                    426:                udp6stat.udp6s_badlen++;
1.54      itojun    427:                goto bad;
                    428:        }
                    429:
1.57      itojun    430:        /* destination port of 0 is illegal, based on RFC768. */
                    431:        if (uh->uh_dport == 0)
                    432:                goto bad;
                    433:
1.54      itojun    434:        /* Be proactive about malicious use of IPv4 mapped address */
                    435:        if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
                    436:            IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
                    437:                /* XXX stat */
1.53      itojun    438:                goto bad;
                    439:        }
                    440:
                    441:        /*
                    442:         * Checksum extended UDP header and data.
                    443:         */
                    444:        if (uh->uh_sum == 0)
                    445:                udp6stat.udp6s_nosum++;
                    446:        else if (in6_cksum(m, IPPROTO_UDP, off, ulen) != 0) {
                    447:                udp6stat.udp6s_badsum++;
                    448:                goto bad;
                    449:        }
                    450:
                    451:        /*
                    452:         * Construct source and dst sockaddrs.
                    453:         * Note that ifindex (s6_addr16[1]) is already filled.
                    454:         */
                    455:        bzero(&src, sizeof(src));
                    456:        src.sin6_family = AF_INET6;
                    457:        src.sin6_len = sizeof(struct sockaddr_in6);
1.69      itojun    458:        /* KAME hack: recover scopeid */
                    459:        (void)in6_recoverscope(&src, &ip6->ip6_src, m->m_pkthdr.rcvif);
1.53      itojun    460:        src.sin6_port = uh->uh_sport;
                    461:        bzero(&dst, sizeof(dst));
                    462:        dst.sin6_family = AF_INET6;
                    463:        dst.sin6_len = sizeof(struct sockaddr_in6);
1.69      itojun    464:        /* KAME hack: recover scopeid */
                    465:        (void)in6_recoverscope(&dst, &ip6->ip6_dst, m->m_pkthdr.rcvif);
1.53      itojun    466:        dst.sin6_port = uh->uh_dport;
                    467:
                    468:        if (udp6_realinput(AF_INET6, &src, &dst, m, off) == 0) {
                    469:                if (m->m_flags & M_MCAST) {
                    470:                        udp6stat.udp6s_noportmcast++;
                    471:                        goto bad;
                    472:                }
1.61      itojun    473:                udp6stat.udp6s_noport++;
1.53      itojun    474:                icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0);
                    475:                m = NULL;
                    476:        }
                    477:
                    478: bad:
                    479:        if (m)
                    480:                m_freem(m);
                    481:        return IPPROTO_DONE;
                    482: }
                    483: #endif
                    484:
1.72      itojun    485: #ifdef INET
1.53      itojun    486: static void
                    487: udp4_sendup(m, off, src, so)
                    488:        struct mbuf *m;
                    489:        int off;        /* offset of data portion */
                    490:        struct sockaddr *src;
                    491:        struct socket *so;
                    492: {
                    493:        struct mbuf *opts = NULL;
                    494:        struct mbuf *n;
                    495:        struct inpcb *inp = NULL;
                    496: #ifdef INET6
                    497:        struct in6pcb *in6p = NULL;
                    498: #endif
                    499:
                    500:        if (!so)
                    501:                return;
                    502:        switch (so->so_proto->pr_domain->dom_family) {
                    503:        case AF_INET:
                    504:                inp = sotoinpcb(so);
                    505:                break;
                    506: #ifdef INET6
                    507:        case AF_INET6:
                    508:                in6p = sotoin6pcb(so);
                    509:                break;
                    510: #endif
                    511:        default:
                    512:                return;
                    513:        }
                    514:
                    515: #ifdef IPSEC
                    516:        /* check AH/ESP integrity. */
                    517:        if (so != NULL && ipsec4_in_reject_so(m, so)) {
                    518:                ipsecstat.in_polvio++;
                    519:                return;
                    520:        }
                    521: #endif /*IPSEC*/
                    522:
                    523:        if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
                    524:                if (inp && (inp->inp_flags & INP_CONTROLOPTS
                    525:                         || so->so_options & SO_TIMESTAMP)) {
                    526:                        struct ip *ip = mtod(n, struct ip *);
                    527:                        ip_savecontrol(inp, &opts, ip, n);
                    528:                }
                    529:
                    530:                m_adj(n, off);
                    531:                if (sbappendaddr(&so->so_rcv, src, n,
                    532:                                opts) == 0) {
                    533:                        m_freem(n);
                    534:                        if (opts)
                    535:                                m_freem(opts);
1.81      enami     536:                        udpstat.udps_fullsock++;
1.53      itojun    537:                } else
                    538:                        sorwakeup(so);
                    539:        }
                    540: }
1.72      itojun    541: #endif
1.53      itojun    542:
                    543: #ifdef INET6
                    544: static void
                    545: udp6_sendup(m, off, src, so)
                    546:        struct mbuf *m;
                    547:        int off;        /* offset of data portion */
                    548:        struct sockaddr *src;
                    549:        struct socket *so;
                    550: {
                    551:        struct mbuf *opts = NULL;
                    552:        struct mbuf *n;
                    553:        struct in6pcb *in6p = NULL;
                    554:
                    555:        if (!so)
                    556:                return;
                    557:        if (so->so_proto->pr_domain->dom_family != AF_INET6)
                    558:                return;
                    559:        in6p = sotoin6pcb(so);
                    560:
                    561: #ifdef IPSEC
                    562:        /* check AH/ESP integrity. */
                    563:        if (so != NULL && ipsec6_in_reject_so(m, so)) {
                    564:                ipsec6stat.in_polvio++;
                    565:                return;
                    566:        }
                    567: #endif /*IPSEC*/
                    568:
                    569:        if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
                    570:                if (in6p && (in6p->in6p_flags & IN6P_CONTROLOPTS
                    571:                          || in6p->in6p_socket->so_options & SO_TIMESTAMP)) {
                    572:                        struct ip6_hdr *ip6 = mtod(n, struct ip6_hdr *);
                    573:                        ip6_savecontrol(in6p, &opts, ip6, n);
                    574:                }
                    575:
                    576:                m_adj(n, off);
                    577:                if (sbappendaddr(&so->so_rcv, src, n, opts) == 0) {
                    578:                        m_freem(n);
                    579:                        if (opts)
                    580:                                m_freem(opts);
                    581:                        udp6stat.udp6s_fullsock++;
                    582:                } else
                    583:                        sorwakeup(so);
                    584:        }
                    585: }
                    586: #endif
                    587:
1.72      itojun    588: #ifdef INET
1.53      itojun    589: static int
                    590: udp4_realinput(src, dst, m, off)
                    591:        struct sockaddr_in *src;
                    592:        struct sockaddr_in *dst;
                    593:        struct mbuf *m;
                    594:        int off;        /* offset of udphdr */
                    595: {
                    596:        u_int16_t *sport, *dport;
                    597:        int rcvcnt;
                    598:        struct in_addr *src4, *dst4;
                    599:        struct inpcb *inp;
                    600:
                    601:        rcvcnt = 0;
                    602:        off += sizeof(struct udphdr);   /* now, offset of payload */
                    603:
                    604:        if (src->sin_family != AF_INET || dst->sin_family != AF_INET)
                    605:                goto bad;
                    606:
                    607:        src4 = &src->sin_addr;
                    608:        sport = &src->sin_port;
                    609:        dst4 = &dst->sin_addr;
                    610:        dport = &dst->sin_port;
                    611:
1.73      itojun    612:        if (IN_MULTICAST(dst4->s_addr) ||
1.53      itojun    613:            in_broadcast(*dst4, m->m_pkthdr.rcvif)) {
                    614:                struct inpcb *last;
                    615:                /*
                    616:                 * Deliver a multicast or broadcast datagram to *all* sockets
                    617:                 * for which the local and remote addresses and ports match
                    618:                 * those of the incoming datagram.  This allows more than
                    619:                 * one process to receive multi/broadcasts on the same port.
                    620:                 * (This really ought to be done for unicast datagrams as
                    621:                 * well, but that would cause problems with existing
                    622:                 * applications that open both address-specific sockets and
                    623:                 * a wildcard socket listening to the same port -- they would
                    624:                 * end up receiving duplicates of every unicast datagram.
                    625:                 * Those applications open the multiple sockets to overcome an
                    626:                 * inadequacy of the UDP socket interface, but for backwards
                    627:                 * compatibility we avoid the problem here rather than
                    628:                 * fixing the interface.  Maybe 4.5BSD will remedy this?)
                    629:                 */
                    630:
                    631:                /*
                    632:                 * KAME note: usually we drop udpiphdr from mbuf here.
1.71      itojun    633:                 * we need udpiphdr for IPsec processing so we do that later.
1.53      itojun    634:                 */
                    635:                /*
                    636:                 * Locate pcb(s) for datagram.
                    637:                 */
                    638:                for (inp = udbtable.inpt_queue.cqh_first;
                    639:                    inp != (struct inpcb *)&udbtable.inpt_queue;
                    640:                    inp = inp->inp_queue.cqe_next) {
                    641:                        if (inp->inp_lport != *dport)
                    642:                                continue;
                    643:                        if (!in_nullhost(inp->inp_laddr)) {
                    644:                                if (!in_hosteq(inp->inp_laddr, *dst4))
                    645:                                        continue;
                    646:                        }
                    647:                        if (!in_nullhost(inp->inp_faddr)) {
                    648:                                if (!in_hosteq(inp->inp_faddr, *src4) ||
                    649:                                    inp->inp_fport != *sport)
                    650:                                        continue;
                    651:                        }
                    652:
                    653:                        last = inp;
                    654:                        udp4_sendup(m, off, (struct sockaddr *)src,
                    655:                                inp->inp_socket);
                    656:                        rcvcnt++;
                    657:
                    658:                        /*
                    659:                         * Don't look for additional matches if this one does
                    660:                         * not have either the SO_REUSEPORT or SO_REUSEADDR
                    661:                         * socket options set.  This heuristic avoids searching
                    662:                         * through all pcbs in the common case of a non-shared
                    663:                         * port.  It assumes that an application will never
                    664:                         * clear these options after setting them.
                    665:                         */
                    666:                        if ((inp->inp_socket->so_options &
                    667:                            (SO_REUSEPORT|SO_REUSEADDR)) == 0)
                    668:                                break;
                    669:                }
                    670:        } else {
                    671:                /*
                    672:                 * Locate pcb for datagram.
                    673:                 */
                    674:                inp = in_pcblookup_connect(&udbtable, *src4, *sport, *dst4, *dport);
                    675:                if (inp == 0) {
                    676:                        ++udpstat.udps_pcbhashmiss;
                    677:                        inp = in_pcblookup_bind(&udbtable, *dst4, *dport);
1.82      itojun    678:                        if (inp == 0)
1.53      itojun    679:                                return rcvcnt;
                    680:                }
                    681:
                    682:                udp4_sendup(m, off, (struct sockaddr *)src, inp->inp_socket);
                    683:                rcvcnt++;
                    684:        }
                    685:
                    686: bad:
                    687:        return rcvcnt;
                    688: }
1.72      itojun    689: #endif
1.53      itojun    690:
                    691: #ifdef INET6
                    692: static int
                    693: in6_mcmatch(in6p, ia6, ifp)
                    694:        struct in6pcb *in6p;
1.66      augustss  695:        struct in6_addr *ia6;
1.53      itojun    696:        struct ifnet *ifp;
                    697: {
                    698:        struct ip6_moptions *im6o = in6p->in6p_moptions;
                    699:        struct in6_multi_mship *imm;
                    700:
                    701:        if (im6o == NULL)
                    702:                return 0;
                    703:
                    704:        for (imm = im6o->im6o_memberships.lh_first; imm != NULL;
                    705:             imm = imm->i6mm_chain.le_next) {
                    706:                if ((ifp == NULL ||
                    707:                     imm->i6mm_maddr->in6m_ifp == ifp) &&
                    708:                    IN6_ARE_ADDR_EQUAL(&imm->i6mm_maddr->in6m_addr,
                    709:                                       ia6))
                    710:                        return 1;
                    711:        }
                    712:        return 0;
                    713: }
                    714:
                    715: static int
                    716: udp6_realinput(af, src, dst, m, off)
                    717:        int af;         /* af on packet */
                    718:        struct sockaddr_in6 *src;
                    719:        struct sockaddr_in6 *dst;
                    720:        struct mbuf *m;
                    721:        int off;        /* offset of udphdr */
                    722: {
1.79      itojun    723:        u_int16_t sport, dport;
1.53      itojun    724:        int rcvcnt;
1.79      itojun    725:        struct in6_addr src6, dst6;
                    726:        const struct in_addr *dst4;
1.53      itojun    727:        struct in6pcb *in6p;
                    728:
                    729:        rcvcnt = 0;
                    730:        off += sizeof(struct udphdr);   /* now, offset of payload */
                    731:
                    732:        if (af != AF_INET && af != AF_INET6)
                    733:                goto bad;
                    734:        if (src->sin6_family != AF_INET6 || dst->sin6_family != AF_INET6)
                    735:                goto bad;
                    736:
1.79      itojun    737:        in6_embedscope(&src6, src, NULL, NULL);
                    738:        sport = src->sin6_port;
                    739:        in6_embedscope(&dst6, dst, NULL, NULL);
                    740:        dport = dst->sin6_port;
1.88    ! itojun    741:        dst4 = (struct in_addr *)&dst->sin6_addr.s6_addr[12];
1.53      itojun    742:
1.79      itojun    743:        if (IN6_IS_ADDR_MULTICAST(&dst6) ||
                    744:            (af == AF_INET && IN_MULTICAST(dst4->s_addr))) {
1.53      itojun    745:                struct in6pcb *last;
                    746:                /*
                    747:                 * Deliver a multicast or broadcast datagram to *all* sockets
                    748:                 * for which the local and remote addresses and ports match
                    749:                 * those of the incoming datagram.  This allows more than
                    750:                 * one process to receive multi/broadcasts on the same port.
                    751:                 * (This really ought to be done for unicast datagrams as
                    752:                 * well, but that would cause problems with existing
                    753:                 * applications that open both address-specific sockets and
                    754:                 * a wildcard socket listening to the same port -- they would
                    755:                 * end up receiving duplicates of every unicast datagram.
                    756:                 * Those applications open the multiple sockets to overcome an
                    757:                 * inadequacy of the UDP socket interface, but for backwards
                    758:                 * compatibility we avoid the problem here rather than
                    759:                 * fixing the interface.  Maybe 4.5BSD will remedy this?)
                    760:                 */
                    761:
                    762:                /*
                    763:                 * KAME note: usually we drop udpiphdr from mbuf here.
1.71      itojun    764:                 * we need udpiphdr for IPsec processing so we do that later.
1.53      itojun    765:                 */
                    766:                /*
                    767:                 * Locate pcb(s) for datagram.
                    768:                 */
                    769:                for (in6p = udb6.in6p_next; in6p != &udb6;
                    770:                     in6p = in6p->in6p_next) {
1.79      itojun    771:                        if (in6p->in6p_lport != dport)
1.53      itojun    772:                                continue;
                    773:                        if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) {
1.79      itojun    774:                                if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &dst6) &&
                    775:                                    !in6_mcmatch(in6p, &dst6, m->m_pkthdr.rcvif))
1.53      itojun    776:                                        continue;
                    777:                        }
1.55      itojun    778:                        else {
1.79      itojun    779:                                if (IN6_IS_ADDR_V4MAPPED(&dst6) &&
1.85      itojun    780:                                    (in6p->in6p_flags & IN6P_IPV6_V6ONLY))
1.55      itojun    781:                                        continue;
                    782:                        }
1.53      itojun    783:                        if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
1.79      itojun    784:                                if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr,
                    785:                                    &src6) || in6p->in6p_fport != sport)
1.53      itojun    786:                                        continue;
                    787:                        }
1.55      itojun    788:                        else {
1.79      itojun    789:                                if (IN6_IS_ADDR_V4MAPPED(&src6) &&
1.85      itojun    790:                                    (in6p->in6p_flags & IN6P_IPV6_V6ONLY))
1.55      itojun    791:                                        continue;
                    792:                        }
1.53      itojun    793:
                    794:                        last = in6p;
                    795:                        udp6_sendup(m, off, (struct sockaddr *)src,
                    796:                                in6p->in6p_socket);
                    797:                        rcvcnt++;
                    798:
                    799:                        /*
                    800:                         * Don't look for additional matches if this one does
                    801:                         * not have either the SO_REUSEPORT or SO_REUSEADDR
                    802:                         * socket options set.  This heuristic avoids searching
                    803:                         * through all pcbs in the common case of a non-shared
                    804:                         * port.  It assumes that an application will never
                    805:                         * clear these options after setting them.
                    806:                         */
                    807:                        if ((in6p->in6p_socket->so_options &
                    808:                            (SO_REUSEPORT|SO_REUSEADDR)) == 0)
                    809:                                break;
                    810:                }
                    811:        } else {
                    812:                /*
                    813:                 * Locate pcb for datagram.
                    814:                 */
1.79      itojun    815:                in6p = in6_pcblookup_connect(&udb6, &src6, sport,
                    816:                    &dst6, dport, 0);
1.53      itojun    817:                if (in6p == 0) {
                    818:                        ++udpstat.udps_pcbhashmiss;
1.79      itojun    819:                        in6p = in6_pcblookup_bind(&udb6, &dst6, dport, 0);
1.82      itojun    820:                        if (in6p == 0)
1.53      itojun    821:                                return rcvcnt;
                    822:                }
                    823:
                    824:                udp6_sendup(m, off, (struct sockaddr *)src, in6p->in6p_socket);
                    825:                rcvcnt++;
                    826:        }
                    827:
                    828: bad:
                    829:        return rcvcnt;
                    830: }
                    831: #endif
1.1       cgd       832:
1.72      itojun    833: #ifdef INET
1.1       cgd       834: /*
                    835:  * Notify a udp user of an asynchronous error;
                    836:  * just wake up so that he can collect error status.
                    837:  */
1.7       mycroft   838: static void
1.1       cgd       839: udp_notify(inp, errno)
1.66      augustss  840:        struct inpcb *inp;
1.7       mycroft   841:        int errno;
1.1       cgd       842: {
1.34      mycroft   843:
1.1       cgd       844:        inp->inp_socket->so_error = errno;
                    845:        sorwakeup(inp->inp_socket);
                    846:        sowwakeup(inp->inp_socket);
                    847: }
                    848:
1.27      christos  849: void *
                    850: udp_ctlinput(cmd, sa, v)
1.1       cgd       851:        int cmd;
                    852:        struct sockaddr *sa;
1.27      christos  853:        void *v;
1.1       cgd       854: {
1.66      augustss  855:        struct ip *ip = v;
                    856:        struct udphdr *uh;
1.18      mycroft   857:        void (*notify) __P((struct inpcb *, int)) = udp_notify;
1.21      mycroft   858:        int errno;
1.1       cgd       859:
1.53      itojun    860:        if (sa->sa_family != AF_INET
                    861:         || sa->sa_len != sizeof(struct sockaddr_in))
1.51      itojun    862:                return NULL;
1.20      mycroft   863:        if ((unsigned)cmd >= PRC_NCMDS)
1.27      christos  864:                return NULL;
1.20      mycroft   865:        errno = inetctlerrmap[cmd];
1.18      mycroft   866:        if (PRC_IS_REDIRECT(cmd))
1.19      mycroft   867:                notify = in_rtchange, ip = 0;
1.18      mycroft   868:        else if (cmd == PRC_HOSTDEAD)
1.19      mycroft   869:                ip = 0;
1.23      cgd       870:        else if (errno == 0)
1.27      christos  871:                return NULL;
1.19      mycroft   872:        if (ip) {
1.1       cgd       873:                uh = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2));
1.34      mycroft   874:                in_pcbnotify(&udbtable, satosin(sa)->sin_addr, uh->uh_dport,
                    875:                    ip->ip_src, uh->uh_sport, errno, notify);
1.53      itojun    876:
                    877:                /* XXX mapped address case */
1.19      mycroft   878:        } else
1.34      mycroft   879:                in_pcbnotifyall(&udbtable, satosin(sa)->sin_addr, errno,
                    880:                    notify);
1.27      christos  881:        return NULL;
1.1       cgd       882: }
                    883:
1.7       mycroft   884: int
1.27      christos  885: #if __STDC__
                    886: udp_output(struct mbuf *m, ...)
                    887: #else
                    888: udp_output(m, va_alist)
                    889:        struct mbuf *m;
                    890:        va_dcl
                    891: #endif
                    892: {
1.66      augustss  893:        struct inpcb *inp;
                    894:        struct udpiphdr *ui;
                    895:        int len = m->m_pkthdr.len;
1.31      mycroft   896:        int error = 0;
1.27      christos  897:        va_list ap;
                    898:
                    899:        va_start(ap, m);
                    900:        inp = va_arg(ap, struct inpcb *);
                    901:        va_end(ap);
1.1       cgd       902:
                    903:        /*
                    904:         * Calculate data length and get a mbuf
                    905:         * for UDP and IP headers.
                    906:         */
1.13      mycroft   907:        M_PREPEND(m, sizeof(struct udpiphdr), M_DONTWAIT);
                    908:        if (m == 0) {
                    909:                error = ENOBUFS;
1.39      thorpej   910:                goto release;
                    911:        }
                    912:
                    913:        /*
                    914:         * Compute the packet length of the IP header, and
                    915:         * punt if the length looks bogus.
                    916:         */
                    917:        if ((len + sizeof(struct udpiphdr)) > IP_MAXPACKET) {
                    918:                error = EMSGSIZE;
1.13      mycroft   919:                goto release;
                    920:        }
1.1       cgd       921:
                    922:        /*
                    923:         * Fill in mbuf with extended UDP header
                    924:         * and addresses and length put into network format.
                    925:         */
                    926:        ui = mtod(m, struct udpiphdr *);
                    927:        ui->ui_pr = IPPROTO_UDP;
                    928:        ui->ui_src = inp->inp_laddr;
                    929:        ui->ui_dst = inp->inp_faddr;
                    930:        ui->ui_sport = inp->inp_lport;
                    931:        ui->ui_dport = inp->inp_fport;
1.78      thorpej   932:        ui->ui_ulen = htons((u_int16_t)len + sizeof(struct udphdr));
1.1       cgd       933:
                    934:        /*
1.78      thorpej   935:         * Set up checksum and output datagram.
1.1       cgd       936:         */
                    937:        if (udpcksum) {
1.78      thorpej   938:                /*
                    939:                 * XXX Cache pseudo-header checksum part for
                    940:                 * XXX "connected" UDP sockets.
                    941:                 */
                    942:                ui->ui_sum = in_cksum_phdr(ui->ui_src.s_addr,
                    943:                    ui->ui_dst.s_addr, htons((u_int16_t)len +
                    944:                    sizeof(struct udphdr) + IPPROTO_UDP));
                    945:                m->m_pkthdr.csum_flags = M_CSUM_UDPv4;
                    946:                m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum);
                    947:        } else
                    948:                ui->ui_sum = 0;
1.1       cgd       949:        ((struct ip *)ui)->ip_len = sizeof (struct udpiphdr) + len;
                    950:        ((struct ip *)ui)->ip_ttl = inp->inp_ip.ip_ttl; /* XXX */
                    951:        ((struct ip *)ui)->ip_tos = inp->inp_ip.ip_tos; /* XXX */
                    952:        udpstat.udps_opackets++;
1.48      itojun    953:
                    954: #ifdef IPSEC
1.75      itojun    955:        if (ipsec_setsocket(m, inp->inp_socket) != 0) {
                    956:                error = ENOBUFS;
                    957:                goto release;
                    958:        }
1.48      itojun    959: #endif /*IPSEC*/
                    960:
1.31      mycroft   961:        return (ip_output(m, inp->inp_options, &inp->inp_route,
1.12      mycroft   962:            inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST),
1.31      mycroft   963:            inp->inp_moptions));
1.1       cgd       964:
                    965: release:
                    966:        m_freem(m);
                    967:        return (error);
                    968: }
                    969:
1.42      thorpej   970: int    udp_sendspace = 9216;           /* really max datagram size */
                    971: int    udp_recvspace = 40 * (1024 + sizeof(struct sockaddr_in));
1.1       cgd       972:                                        /* 40 1K datagrams */
                    973:
                    974: /*ARGSUSED*/
1.7       mycroft   975: int
1.31      mycroft   976: udp_usrreq(so, req, m, nam, control, p)
1.1       cgd       977:        struct socket *so;
                    978:        int req;
1.31      mycroft   979:        struct mbuf *m, *nam, *control;
1.30      mycroft   980:        struct proc *p;
1.1       cgd       981: {
1.66      augustss  982:        struct inpcb *inp;
1.1       cgd       983:        int s;
1.66      augustss  984:        int error = 0;
1.1       cgd       985:
                    986:        if (req == PRU_CONTROL)
1.31      mycroft   987:                return (in_control(so, (long)m, (caddr_t)nam,
1.30      mycroft   988:                    (struct ifnet *)control, p));
1.59      thorpej   989:
1.60      thorpej   990:        if (req == PRU_PURGEIF) {
1.80      itojun    991:                in_pcbpurgeif0(&udbtable, (struct ifnet *)control);
1.60      thorpej   992:                in_purgeif((struct ifnet *)control);
                    993:                in_pcbpurgeif(&udbtable, (struct ifnet *)control);
1.59      thorpej   994:                return (0);
                    995:        }
1.31      mycroft   996:
                    997:        s = splsoftnet();
                    998:        inp = sotoinpcb(so);
1.32      mycroft   999: #ifdef DIAGNOSTIC
                   1000:        if (req != PRU_SEND && req != PRU_SENDOOB && control)
                   1001:                panic("udp_usrreq: unexpected control mbuf");
                   1002: #endif
1.31      mycroft  1003:        if (inp == 0 && req != PRU_ATTACH) {
                   1004:                error = EINVAL;
                   1005:                goto release;
                   1006:        }
                   1007:
1.1       cgd      1008:        /*
                   1009:         * Note: need to block udp_input while changing
                   1010:         * the udp pcb queue and/or pcb addresses.
                   1011:         */
                   1012:        switch (req) {
                   1013:
                   1014:        case PRU_ATTACH:
1.31      mycroft  1015:                if (inp != 0) {
                   1016:                        error = EISCONN;
1.1       cgd      1017:                        break;
                   1018:                }
1.31      mycroft  1019:                if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
                   1020:                        error = soreserve(so, udp_sendspace, udp_recvspace);
                   1021:                        if (error)
                   1022:                                break;
                   1023:                }
1.18      mycroft  1024:                error = in_pcballoc(so, &udbtable);
1.1       cgd      1025:                if (error)
                   1026:                        break;
1.31      mycroft  1027:                inp = sotoinpcb(so);
                   1028:                inp->inp_ip.ip_ttl = ip_defttl;
1.1       cgd      1029:                break;
                   1030:
                   1031:        case PRU_DETACH:
1.31      mycroft  1032:                in_pcbdetach(inp);
1.1       cgd      1033:                break;
                   1034:
                   1035:        case PRU_BIND:
1.31      mycroft  1036:                error = in_pcbbind(inp, nam, p);
1.1       cgd      1037:                break;
                   1038:
                   1039:        case PRU_LISTEN:
                   1040:                error = EOPNOTSUPP;
                   1041:                break;
                   1042:
                   1043:        case PRU_CONNECT:
1.31      mycroft  1044:                error = in_pcbconnect(inp, nam);
                   1045:                if (error)
1.1       cgd      1046:                        break;
1.31      mycroft  1047:                soisconnected(so);
1.1       cgd      1048:                break;
                   1049:
                   1050:        case PRU_CONNECT2:
                   1051:                error = EOPNOTSUPP;
                   1052:                break;
                   1053:
                   1054:        case PRU_DISCONNECT:
1.31      mycroft  1055:                /*soisdisconnected(so);*/
                   1056:                so->so_state &= ~SS_ISCONNECTED;        /* XXX */
1.1       cgd      1057:                in_pcbdisconnect(inp);
1.34      mycroft  1058:                inp->inp_laddr = zeroin_addr;           /* XXX */
1.35      mycroft  1059:                in_pcbstate(inp, INP_BOUND);            /* XXX */
1.1       cgd      1060:                break;
                   1061:
                   1062:        case PRU_SHUTDOWN:
                   1063:                socantsendmore(so);
                   1064:                break;
                   1065:
1.31      mycroft  1066:        case PRU_RCVD:
                   1067:                error = EOPNOTSUPP;
1.1       cgd      1068:                break;
                   1069:
1.31      mycroft  1070:        case PRU_SEND:
1.32      mycroft  1071:                if (control && control->m_len) {
                   1072:                        m_freem(control);
                   1073:                        m_freem(m);
                   1074:                        error = EINVAL;
                   1075:                        break;
                   1076:                }
1.31      mycroft  1077:        {
1.35      mycroft  1078:                struct in_addr laddr;                   /* XXX */
1.1       cgd      1079:
1.31      mycroft  1080:                if (nam) {
1.35      mycroft  1081:                        laddr = inp->inp_laddr;         /* XXX */
1.31      mycroft  1082:                        if ((so->so_state & SS_ISCONNECTED) != 0) {
                   1083:                                error = EISCONN;
1.32      mycroft  1084:                                goto die;
1.31      mycroft  1085:                        }
                   1086:                        error = in_pcbconnect(inp, nam);
1.32      mycroft  1087:                        if (error) {
                   1088:                        die:
                   1089:                                m_freem(m);
1.31      mycroft  1090:                                break;
1.32      mycroft  1091:                        }
1.31      mycroft  1092:                } else {
                   1093:                        if ((so->so_state & SS_ISCONNECTED) == 0) {
                   1094:                                error = ENOTCONN;
1.32      mycroft  1095:                                goto die;
1.31      mycroft  1096:                        }
                   1097:                }
1.33      mycroft  1098:                error = udp_output(m, inp);
1.31      mycroft  1099:                if (nam) {
                   1100:                        in_pcbdisconnect(inp);
1.35      mycroft  1101:                        inp->inp_laddr = laddr;         /* XXX */
                   1102:                        in_pcbstate(inp, INP_BOUND);    /* XXX */
1.31      mycroft  1103:                }
                   1104:        }
1.1       cgd      1105:                break;
                   1106:
                   1107:        case PRU_SENSE:
                   1108:                /*
                   1109:                 * stat: don't bother with a blocksize.
                   1110:                 */
1.31      mycroft  1111:                splx(s);
1.1       cgd      1112:                return (0);
                   1113:
1.31      mycroft  1114:        case PRU_RCVOOB:
                   1115:                error =  EOPNOTSUPP;
                   1116:                break;
                   1117:
1.1       cgd      1118:        case PRU_SENDOOB:
1.32      mycroft  1119:                m_freem(control);
1.31      mycroft  1120:                m_freem(m);
1.1       cgd      1121:                error =  EOPNOTSUPP;
                   1122:                break;
                   1123:
1.31      mycroft  1124:        case PRU_SOCKADDR:
                   1125:                in_setsockaddr(inp, nam);
                   1126:                break;
                   1127:
                   1128:        case PRU_PEERADDR:
                   1129:                in_setpeeraddr(inp, nam);
                   1130:                break;
1.1       cgd      1131:
                   1132:        default:
                   1133:                panic("udp_usrreq");
                   1134:        }
                   1135:
                   1136: release:
1.31      mycroft  1137:        splx(s);
1.1       cgd      1138:        return (error);
1.13      mycroft  1139: }
                   1140:
                   1141: /*
                   1142:  * Sysctl for udp variables.
                   1143:  */
1.27      christos 1144: int
1.13      mycroft  1145: udp_sysctl(name, namelen, oldp, oldlenp, newp, newlen)
                   1146:        int *name;
                   1147:        u_int namelen;
                   1148:        void *oldp;
                   1149:        size_t *oldlenp;
                   1150:        void *newp;
                   1151:        size_t newlen;
                   1152: {
                   1153:        /* All sysctl names at this level are terminal. */
                   1154:        if (namelen != 1)
                   1155:                return (ENOTDIR);
                   1156:
                   1157:        switch (name[0]) {
                   1158:        case UDPCTL_CHECKSUM:
                   1159:                return (sysctl_int(oldp, oldlenp, newp, newlen, &udpcksum));
1.42      thorpej  1160:        case UDPCTL_SENDSPACE:
                   1161:                return (sysctl_int(oldp, oldlenp, newp, newlen,
                   1162:                    &udp_sendspace));
                   1163:        case UDPCTL_RECVSPACE:
                   1164:                return (sysctl_int(oldp, oldlenp, newp, newlen,
                   1165:                    &udp_recvspace));
1.13      mycroft  1166:        default:
                   1167:                return (ENOPROTOOPT);
                   1168:        }
                   1169:        /* NOTREACHED */
1.1       cgd      1170: }
1.72      itojun   1171: #endif

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