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Annotation of src/sys/netinet/udp_usrreq.c, Revision 1.98

1.98    ! matt        1: /*     $NetBSD: udp_usrreq.c,v 1.97 2003/01/20 00:05:46 simonb 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.
                     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:  */
1.91      lukem      66:
                     67: #include <sys/cdefs.h>
1.98    ! matt       68: __KERNEL_RCSID(0, "$NetBSD: udp_usrreq.c,v 1.97 2003/01/20 00:05:46 simonb Exp $");
1.50      thorpej    69:
1.77      soda       70: #include "opt_inet.h"
1.50      thorpej    71: #include "opt_ipsec.h"
1.78      thorpej    72: #include "opt_inet_csum.h"
1.64      ws         73: #include "opt_ipkdb.h"
1.1       cgd        74:
1.5       mycroft    75: #include <sys/param.h>
                     76: #include <sys/malloc.h>
                     77: #include <sys/mbuf.h>
                     78: #include <sys/protosw.h>
                     79: #include <sys/socket.h>
                     80: #include <sys/socketvar.h>
1.13      mycroft    81: #include <sys/errno.h>
1.5       mycroft    82: #include <sys/stat.h>
1.27      christos   83: #include <sys/systm.h>
                     84: #include <sys/proc.h>
1.53      itojun     85: #include <sys/domain.h>
1.27      christos   86: #include <sys/sysctl.h>
1.1       cgd        87:
1.5       mycroft    88: #include <net/if.h>
                     89: #include <net/route.h>
1.1       cgd        90:
1.5       mycroft    91: #include <netinet/in.h>
                     92: #include <netinet/in_systm.h>
1.15      cgd        93: #include <netinet/in_var.h>
1.5       mycroft    94: #include <netinet/ip.h>
                     95: #include <netinet/in_pcb.h>
                     96: #include <netinet/ip_var.h>
                     97: #include <netinet/ip_icmp.h>
                     98: #include <netinet/udp.h>
                     99: #include <netinet/udp_var.h>
1.1       cgd       100:
1.53      itojun    101: #ifdef INET6
                    102: #include <netinet/ip6.h>
                    103: #include <netinet/icmp6.h>
                    104: #include <netinet6/ip6_var.h>
                    105: #include <netinet6/in6_pcb.h>
                    106: #include <netinet6/udp6_var.h>
                    107: #endif
                    108:
                    109: #ifdef PULLDOWN_TEST
                    110: #ifndef INET6
                    111: /* always need ip6.h for IP6_EXTHDR_GET */
                    112: #include <netinet/ip6.h>
                    113: #endif
                    114: #endif
                    115:
1.76      itojun    116: #include "faith.h"
                    117: #if defined(NFAITH) && NFAITH > 0
                    118: #include <net/if_faith.h>
                    119: #endif
                    120:
1.27      christos  121: #include <machine/stdarg.h>
                    122:
1.48      itojun    123: #ifdef IPSEC
                    124: #include <netinet6/ipsec.h>
                    125: #include <netkey/key.h>
                    126: #endif /*IPSEC*/
                    127:
1.64      ws        128: #ifdef IPKDB
                    129: #include <ipkdb/ipkdb.h>
                    130: #endif
                    131:
1.8       mycroft   132: /*
                    133:  * UDP protocol implementation.
                    134:  * Per RFC 768, August, 1980.
                    135:  */
                    136: #ifndef        COMPAT_42
                    137: int    udpcksum = 1;
                    138: #else
                    139: int    udpcksum = 0;           /* XXX */
                    140: #endif
1.93      matt      141:
                    142: struct inpcbtable udbtable;
                    143: struct udpstat udpstat;
1.8       mycroft   144:
1.72      itojun    145: #ifdef INET
1.53      itojun    146: static void udp4_sendup __P((struct mbuf *, int, struct sockaddr *,
                    147:        struct socket *));
                    148: static int udp4_realinput __P((struct sockaddr_in *, struct sockaddr_in *,
                    149:        struct mbuf *, int));
1.72      itojun    150: #endif
1.53      itojun    151: #ifdef INET6
                    152: static void udp6_sendup __P((struct mbuf *, int, struct sockaddr *,
                    153:        struct socket *));
                    154: static int udp6_realinput __P((int, struct sockaddr_in6 *,
                    155:        struct sockaddr_in6 *, struct mbuf *, int));
                    156: #endif
1.72      itojun    157: #ifdef INET
1.13      mycroft   158: static void udp_notify __P((struct inpcb *, int));
1.72      itojun    159: #endif
1.7       mycroft   160:
1.26      mycroft   161: #ifndef UDBHASHSIZE
                    162: #define        UDBHASHSIZE     128
                    163: #endif
                    164: int    udbhashsize = UDBHASHSIZE;
                    165:
1.98    ! matt      166: #ifdef MBUFTRACE
        !           167: struct mowner udp_mowner = { "udp" };
        !           168: struct mowner udp_rx_mowner = { "udp", "rx" };
        !           169: struct mowner udp_tx_mowner = { "udp", "tx" };
        !           170: #endif
        !           171:
1.78      thorpej   172: #ifdef UDP_CSUM_COUNTERS
                    173: #include <sys/device.h>
                    174:
                    175: struct evcnt udp_hwcsum_bad = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
                    176:     NULL, "udp", "hwcsum bad");
                    177: struct evcnt udp_hwcsum_ok = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
                    178:     NULL, "udp", "hwcsum ok");
                    179: struct evcnt udp_hwcsum_data = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
                    180:     NULL, "udp", "hwcsum data");
                    181: struct evcnt udp_swcsum = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
                    182:     NULL, "udp", "swcsum");
                    183:
                    184: #define        UDP_CSUM_COUNTER_INCR(ev)       (ev)->ev_count++
                    185:
                    186: #else
                    187:
                    188: #define        UDP_CSUM_COUNTER_INCR(ev)       /* nothing */
                    189:
                    190: #endif /* UDP_CSUM_COUNTERS */
                    191:
1.7       mycroft   192: void
1.1       cgd       193: udp_init()
                    194: {
1.18      mycroft   195:
1.72      itojun    196: #ifdef INET
1.35      mycroft   197:        in_pcbinit(&udbtable, udbhashsize, udbhashsize);
1.72      itojun    198: #endif
1.78      thorpej   199:
                    200: #ifdef UDP_CSUM_COUNTERS
                    201:        evcnt_attach_static(&udp_hwcsum_bad);
                    202:        evcnt_attach_static(&udp_hwcsum_ok);
                    203:        evcnt_attach_static(&udp_hwcsum_data);
                    204:        evcnt_attach_static(&udp_swcsum);
                    205: #endif /* UDP_CSUM_COUNTERS */
1.98    ! matt      206:
        !           207:        MOWNER_ATTACH(&udp_tx_mowner);
        !           208:        MOWNER_ATTACH(&udp_rx_mowner);
        !           209:        MOWNER_ATTACH(&udp_mowner);
1.1       cgd       210: }
                    211:
1.72      itojun    212: #ifdef INET
1.7       mycroft   213: void
1.27      christos  214: #if __STDC__
                    215: udp_input(struct mbuf *m, ...)
                    216: #else
                    217: udp_input(m, va_alist)
                    218:        struct mbuf *m;
                    219:        va_dcl
                    220: #endif
1.1       cgd       221: {
1.53      itojun    222:        va_list ap;
                    223:        struct sockaddr_in src, dst;
                    224:        struct ip *ip;
                    225:        struct udphdr *uh;
1.97      simonb    226:        int iphlen;
1.53      itojun    227:        int len;
                    228:        int n;
1.96      itojun    229:        u_int16_t ip_len;
1.53      itojun    230:
                    231:        va_start(ap, m);
                    232:        iphlen = va_arg(ap, int);
1.97      simonb    233:        (void)va_arg(ap, int);          /* ignore value, advance ap */
1.53      itojun    234:        va_end(ap);
                    235:
1.98    ! matt      236:        MCLAIM(m, &udp_rx_mowner);
1.53      itojun    237:        udpstat.udps_ipackets++;
                    238:
                    239: #ifndef PULLDOWN_TEST
                    240:        /*
                    241:         * Strip IP options, if any; should skip this,
                    242:         * make available to user, and use on returned packets,
                    243:         * but we don't yet have a way to check the checksum
                    244:         * with options still present.
                    245:         */
                    246:        if (iphlen > sizeof (struct ip)) {
                    247:                ip_stripoptions(m, (struct mbuf *)0);
                    248:                iphlen = sizeof(struct ip);
                    249:        }
                    250: #else
                    251:        /*
                    252:         * we may enable the above code if we save and pass IPv4 options
                    253:         * to the userland.
                    254:         */
                    255: #endif
                    256:
                    257:        /*
                    258:         * Get IP and UDP header together in first mbuf.
                    259:         */
                    260:        ip = mtod(m, struct ip *);
                    261: #ifndef PULLDOWN_TEST
                    262:        if (m->m_len < iphlen + sizeof(struct udphdr)) {
                    263:                if ((m = m_pullup(m, iphlen + sizeof(struct udphdr))) == 0) {
                    264:                        udpstat.udps_hdrops++;
                    265:                        return;
                    266:                }
                    267:                ip = mtod(m, struct ip *);
                    268:        }
                    269:        uh = (struct udphdr *)((caddr_t)ip + iphlen);
                    270: #else
                    271:        IP6_EXTHDR_GET(uh, struct udphdr *, m, iphlen, sizeof(struct udphdr));
                    272:        if (uh == NULL) {
                    273:                udpstat.udps_hdrops++;
                    274:                return;
                    275:        }
                    276: #endif
1.95      thorpej   277:        KASSERT(UDP_HDR_ALIGNED_P(uh));
1.53      itojun    278:
1.57      itojun    279:        /* destination port of 0 is illegal, based on RFC768. */
                    280:        if (uh->uh_dport == 0)
                    281:                goto bad;
                    282:
1.53      itojun    283:        /*
                    284:         * Make mbuf data length reflect UDP length.
                    285:         * If not enough data to reflect UDP length, drop.
                    286:         */
1.96      itojun    287:        ip_len = ntohs(ip->ip_len);
1.53      itojun    288:        len = ntohs((u_int16_t)uh->uh_ulen);
1.96      itojun    289:        if (ip_len != iphlen + len) {
                    290:                if (ip_len < iphlen + len || len < sizeof(struct udphdr)) {
1.53      itojun    291:                        udpstat.udps_badlen++;
                    292:                        goto bad;
                    293:                }
1.96      itojun    294:                m_adj(m, iphlen + len - ip_len);
1.53      itojun    295:        }
                    296:
                    297:        /*
                    298:         * Checksum extended UDP header and data.
                    299:         */
                    300:        if (uh->uh_sum) {
1.78      thorpej   301:                switch (m->m_pkthdr.csum_flags &
1.84      thorpej   302:                        ((m->m_pkthdr.rcvif->if_csum_flags_rx & M_CSUM_UDPv4) |
1.78      thorpej   303:                         M_CSUM_TCP_UDP_BAD | M_CSUM_DATA)) {
                    304:                case M_CSUM_UDPv4|M_CSUM_TCP_UDP_BAD:
                    305:                        UDP_CSUM_COUNTER_INCR(&udp_hwcsum_bad);
                    306:                        goto badcsum;
                    307:
                    308:                case M_CSUM_UDPv4|M_CSUM_DATA:
                    309:                        UDP_CSUM_COUNTER_INCR(&udp_hwcsum_data);
                    310:                        if ((m->m_pkthdr.csum_data ^ 0xffff) != 0)
                    311:                                goto badcsum;
                    312:                        break;
                    313:
                    314:                case M_CSUM_UDPv4:
                    315:                        /* Checksum was okay. */
                    316:                        UDP_CSUM_COUNTER_INCR(&udp_hwcsum_ok);
                    317:                        break;
                    318:
                    319:                default:
                    320:                        /* Need to compute it ourselves. */
                    321:                        UDP_CSUM_COUNTER_INCR(&udp_swcsum);
                    322:                        if (in4_cksum(m, IPPROTO_UDP, iphlen, len) != 0)
                    323:                                goto badcsum;
                    324:                        break;
1.53      itojun    325:                }
                    326:        }
                    327:
                    328:        /* construct source and dst sockaddrs. */
                    329:        bzero(&src, sizeof(src));
                    330:        src.sin_family = AF_INET;
                    331:        src.sin_len = sizeof(struct sockaddr_in);
                    332:        bcopy(&ip->ip_src, &src.sin_addr, sizeof(src.sin_addr));
                    333:        src.sin_port = uh->uh_sport;
                    334:        bzero(&dst, sizeof(dst));
                    335:        dst.sin_family = AF_INET;
                    336:        dst.sin_len = sizeof(struct sockaddr_in);
                    337:        bcopy(&ip->ip_dst, &dst.sin_addr, sizeof(dst.sin_addr));
                    338:        dst.sin_port = uh->uh_dport;
                    339:
                    340:        n = udp4_realinput(&src, &dst, m, iphlen);
                    341: #ifdef INET6
                    342:        if (IN_MULTICAST(ip->ip_dst.s_addr) || n == 0) {
                    343:                struct sockaddr_in6 src6, dst6;
                    344:
                    345:                bzero(&src6, sizeof(src6));
                    346:                src6.sin6_family = AF_INET6;
                    347:                src6.sin6_len = sizeof(struct sockaddr_in6);
                    348:                src6.sin6_addr.s6_addr[10] = src6.sin6_addr.s6_addr[11] = 0xff;
                    349:                bcopy(&ip->ip_src, &src6.sin6_addr.s6_addr[12],
                    350:                        sizeof(ip->ip_src));
                    351:                src6.sin6_port = uh->uh_sport;
                    352:                bzero(&dst6, sizeof(dst6));
                    353:                dst6.sin6_family = AF_INET6;
                    354:                dst6.sin6_len = sizeof(struct sockaddr_in6);
                    355:                dst6.sin6_addr.s6_addr[10] = dst6.sin6_addr.s6_addr[11] = 0xff;
                    356:                bcopy(&ip->ip_dst, &dst6.sin6_addr.s6_addr[12],
                    357:                        sizeof(ip->ip_dst));
                    358:                dst6.sin6_port = uh->uh_dport;
                    359:
                    360:                n += udp6_realinput(AF_INET, &src6, &dst6, m, iphlen);
                    361:        }
                    362: #endif
                    363:
                    364:        if (n == 0) {
                    365:                if (m->m_flags & (M_BCAST | M_MCAST)) {
                    366:                        udpstat.udps_noportbcast++;
                    367:                        goto bad;
                    368:                }
1.61      itojun    369:                udpstat.udps_noport++;
1.64      ws        370: #ifdef IPKDB
1.53      itojun    371:                if (checkipkdb(&ip->ip_src, uh->uh_sport, uh->uh_dport,
                    372:                                m, iphlen + sizeof(struct udphdr),
                    373:                                m->m_pkthdr.len - iphlen - sizeof(struct udphdr))) {
                    374:                        /*
                    375:                         * It was a debugger connect packet,
                    376:                         * just drop it now
                    377:                         */
                    378:                        goto bad;
                    379:                }
                    380: #endif
                    381:                icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0);
                    382:                m = NULL;
                    383:        }
                    384:
                    385: bad:
                    386:        if (m)
                    387:                m_freem(m);
1.78      thorpej   388:        return;
                    389:
                    390: badcsum:
                    391:        m_freem(m);
                    392:        udpstat.udps_badsum++;
1.53      itojun    393: }
1.72      itojun    394: #endif
1.53      itojun    395:
                    396: #ifdef INET6
                    397: int
                    398: udp6_input(mp, offp, proto)
                    399:        struct mbuf **mp;
                    400:        int *offp, proto;
                    401: {
                    402:        struct mbuf *m = *mp;
                    403:        int off = *offp;
                    404:        struct sockaddr_in6 src, dst;
                    405:        struct ip6_hdr *ip6;
                    406:        struct udphdr *uh;
                    407:        u_int32_t plen, ulen;
                    408:
1.76      itojun    409: #ifndef PULLDOWN_TEST
                    410:        IP6_EXTHDR_CHECK(m, off, sizeof(struct udphdr), IPPROTO_DONE);
                    411: #endif
                    412:        ip6 = mtod(m, struct ip6_hdr *);
                    413:
1.53      itojun    414: #if defined(NFAITH) && 0 < NFAITH
1.76      itojun    415:        if (faithprefix(&ip6->ip6_dst)) {
                    416:                /* send icmp6 host unreach? */
                    417:                m_freem(m);
                    418:                return IPPROTO_DONE;
1.53      itojun    419:        }
                    420: #endif
                    421:
                    422:        udp6stat.udp6s_ipackets++;
                    423:
                    424:        /* check for jumbogram is done in ip6_input.  we can trust pkthdr.len */
                    425:        plen = m->m_pkthdr.len - off;
                    426: #ifndef PULLDOWN_TEST
                    427:        uh = (struct udphdr *)((caddr_t)ip6 + off);
                    428: #else
                    429:        IP6_EXTHDR_GET(uh, struct udphdr *, m, off, sizeof(struct udphdr));
                    430:        if (uh == NULL) {
                    431:                ip6stat.ip6s_tooshort++;
                    432:                return IPPROTO_DONE;
                    433:        }
                    434: #endif
1.95      thorpej   435:        KASSERT(UDP_HDR_ALIGNED_P(uh));
1.53      itojun    436:        ulen = ntohs((u_short)uh->uh_ulen);
1.69      itojun    437:        /*
                    438:         * RFC2675 section 4: jumbograms will have 0 in the UDP header field,
                    439:         * iff payload length > 0xffff.
                    440:         */
1.53      itojun    441:        if (ulen == 0 && plen > 0xffff)
                    442:                ulen = plen;
                    443:
                    444:        if (plen != ulen) {
                    445:                udp6stat.udp6s_badlen++;
1.54      itojun    446:                goto bad;
                    447:        }
                    448:
1.57      itojun    449:        /* destination port of 0 is illegal, based on RFC768. */
                    450:        if (uh->uh_dport == 0)
                    451:                goto bad;
                    452:
1.54      itojun    453:        /* Be proactive about malicious use of IPv4 mapped address */
                    454:        if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
                    455:            IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
                    456:                /* XXX stat */
1.53      itojun    457:                goto bad;
                    458:        }
                    459:
                    460:        /*
                    461:         * Checksum extended UDP header and data.
                    462:         */
                    463:        if (uh->uh_sum == 0)
                    464:                udp6stat.udp6s_nosum++;
                    465:        else if (in6_cksum(m, IPPROTO_UDP, off, ulen) != 0) {
                    466:                udp6stat.udp6s_badsum++;
                    467:                goto bad;
                    468:        }
                    469:
                    470:        /*
                    471:         * Construct source and dst sockaddrs.
                    472:         * Note that ifindex (s6_addr16[1]) is already filled.
                    473:         */
                    474:        bzero(&src, sizeof(src));
                    475:        src.sin6_family = AF_INET6;
                    476:        src.sin6_len = sizeof(struct sockaddr_in6);
1.69      itojun    477:        /* KAME hack: recover scopeid */
                    478:        (void)in6_recoverscope(&src, &ip6->ip6_src, m->m_pkthdr.rcvif);
1.53      itojun    479:        src.sin6_port = uh->uh_sport;
                    480:        bzero(&dst, sizeof(dst));
                    481:        dst.sin6_family = AF_INET6;
                    482:        dst.sin6_len = sizeof(struct sockaddr_in6);
1.69      itojun    483:        /* KAME hack: recover scopeid */
                    484:        (void)in6_recoverscope(&dst, &ip6->ip6_dst, m->m_pkthdr.rcvif);
1.53      itojun    485:        dst.sin6_port = uh->uh_dport;
                    486:
                    487:        if (udp6_realinput(AF_INET6, &src, &dst, m, off) == 0) {
                    488:                if (m->m_flags & M_MCAST) {
                    489:                        udp6stat.udp6s_noportmcast++;
                    490:                        goto bad;
                    491:                }
1.61      itojun    492:                udp6stat.udp6s_noport++;
1.53      itojun    493:                icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0);
                    494:                m = NULL;
                    495:        }
                    496:
                    497: bad:
                    498:        if (m)
                    499:                m_freem(m);
                    500:        return IPPROTO_DONE;
                    501: }
                    502: #endif
                    503:
1.72      itojun    504: #ifdef INET
1.53      itojun    505: static void
                    506: udp4_sendup(m, off, src, so)
                    507:        struct mbuf *m;
                    508:        int off;        /* offset of data portion */
                    509:        struct sockaddr *src;
                    510:        struct socket *so;
                    511: {
                    512:        struct mbuf *opts = NULL;
                    513:        struct mbuf *n;
                    514:        struct inpcb *inp = NULL;
                    515:
                    516:        if (!so)
                    517:                return;
                    518:        switch (so->so_proto->pr_domain->dom_family) {
                    519:        case AF_INET:
                    520:                inp = sotoinpcb(so);
                    521:                break;
                    522: #ifdef INET6
                    523:        case AF_INET6:
                    524:                break;
                    525: #endif
                    526:        default:
                    527:                return;
                    528:        }
                    529:
                    530: #ifdef IPSEC
                    531:        /* check AH/ESP integrity. */
                    532:        if (so != NULL && ipsec4_in_reject_so(m, so)) {
                    533:                ipsecstat.in_polvio++;
                    534:                return;
                    535:        }
                    536: #endif /*IPSEC*/
                    537:
                    538:        if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
                    539:                if (inp && (inp->inp_flags & INP_CONTROLOPTS
                    540:                         || so->so_options & SO_TIMESTAMP)) {
                    541:                        struct ip *ip = mtod(n, struct ip *);
                    542:                        ip_savecontrol(inp, &opts, ip, n);
                    543:                }
                    544:
                    545:                m_adj(n, off);
                    546:                if (sbappendaddr(&so->so_rcv, src, n,
                    547:                                opts) == 0) {
                    548:                        m_freem(n);
                    549:                        if (opts)
                    550:                                m_freem(opts);
1.81      enami     551:                        udpstat.udps_fullsock++;
1.53      itojun    552:                } else
                    553:                        sorwakeup(so);
                    554:        }
                    555: }
1.72      itojun    556: #endif
1.53      itojun    557:
                    558: #ifdef INET6
                    559: static void
                    560: udp6_sendup(m, off, src, so)
                    561:        struct mbuf *m;
                    562:        int off;        /* offset of data portion */
                    563:        struct sockaddr *src;
                    564:        struct socket *so;
                    565: {
                    566:        struct mbuf *opts = NULL;
                    567:        struct mbuf *n;
                    568:        struct in6pcb *in6p = NULL;
                    569:
                    570:        if (!so)
                    571:                return;
                    572:        if (so->so_proto->pr_domain->dom_family != AF_INET6)
                    573:                return;
                    574:        in6p = sotoin6pcb(so);
                    575:
                    576: #ifdef IPSEC
                    577:        /* check AH/ESP integrity. */
                    578:        if (so != NULL && ipsec6_in_reject_so(m, so)) {
                    579:                ipsec6stat.in_polvio++;
                    580:                return;
                    581:        }
                    582: #endif /*IPSEC*/
                    583:
                    584:        if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
                    585:                if (in6p && (in6p->in6p_flags & IN6P_CONTROLOPTS
                    586:                          || in6p->in6p_socket->so_options & SO_TIMESTAMP)) {
                    587:                        struct ip6_hdr *ip6 = mtod(n, struct ip6_hdr *);
                    588:                        ip6_savecontrol(in6p, &opts, ip6, n);
                    589:                }
                    590:
                    591:                m_adj(n, off);
                    592:                if (sbappendaddr(&so->so_rcv, src, n, opts) == 0) {
                    593:                        m_freem(n);
                    594:                        if (opts)
                    595:                                m_freem(opts);
                    596:                        udp6stat.udp6s_fullsock++;
                    597:                } else
                    598:                        sorwakeup(so);
                    599:        }
                    600: }
                    601: #endif
                    602:
1.72      itojun    603: #ifdef INET
1.53      itojun    604: static int
                    605: udp4_realinput(src, dst, m, off)
                    606:        struct sockaddr_in *src;
                    607:        struct sockaddr_in *dst;
                    608:        struct mbuf *m;
                    609:        int off;        /* offset of udphdr */
                    610: {
                    611:        u_int16_t *sport, *dport;
                    612:        int rcvcnt;
                    613:        struct in_addr *src4, *dst4;
                    614:        struct inpcb *inp;
                    615:
                    616:        rcvcnt = 0;
                    617:        off += sizeof(struct udphdr);   /* now, offset of payload */
                    618:
                    619:        if (src->sin_family != AF_INET || dst->sin_family != AF_INET)
                    620:                goto bad;
                    621:
                    622:        src4 = &src->sin_addr;
                    623:        sport = &src->sin_port;
                    624:        dst4 = &dst->sin_addr;
                    625:        dport = &dst->sin_port;
                    626:
1.73      itojun    627:        if (IN_MULTICAST(dst4->s_addr) ||
1.53      itojun    628:            in_broadcast(*dst4, m->m_pkthdr.rcvif)) {
                    629:                /*
                    630:                 * Deliver a multicast or broadcast datagram to *all* sockets
                    631:                 * for which the local and remote addresses and ports match
                    632:                 * those of the incoming datagram.  This allows more than
                    633:                 * one process to receive multi/broadcasts on the same port.
                    634:                 * (This really ought to be done for unicast datagrams as
                    635:                 * well, but that would cause problems with existing
                    636:                 * applications that open both address-specific sockets and
                    637:                 * a wildcard socket listening to the same port -- they would
                    638:                 * end up receiving duplicates of every unicast datagram.
                    639:                 * Those applications open the multiple sockets to overcome an
                    640:                 * inadequacy of the UDP socket interface, but for backwards
                    641:                 * compatibility we avoid the problem here rather than
                    642:                 * fixing the interface.  Maybe 4.5BSD will remedy this?)
                    643:                 */
                    644:
                    645:                /*
1.92      itojun    646:                 * KAME note: traditionally we dropped udpiphdr from mbuf here.
1.71      itojun    647:                 * we need udpiphdr for IPsec processing so we do that later.
1.53      itojun    648:                 */
                    649:                /*
                    650:                 * Locate pcb(s) for datagram.
                    651:                 */
1.89      matt      652:                CIRCLEQ_FOREACH(inp, &udbtable.inpt_queue, inp_queue) {
1.53      itojun    653:                        if (inp->inp_lport != *dport)
                    654:                                continue;
                    655:                        if (!in_nullhost(inp->inp_laddr)) {
                    656:                                if (!in_hosteq(inp->inp_laddr, *dst4))
                    657:                                        continue;
                    658:                        }
                    659:                        if (!in_nullhost(inp->inp_faddr)) {
                    660:                                if (!in_hosteq(inp->inp_faddr, *src4) ||
                    661:                                    inp->inp_fport != *sport)
                    662:                                        continue;
                    663:                        }
                    664:
                    665:                        udp4_sendup(m, off, (struct sockaddr *)src,
                    666:                                inp->inp_socket);
                    667:                        rcvcnt++;
                    668:
                    669:                        /*
                    670:                         * Don't look for additional matches if this one does
                    671:                         * not have either the SO_REUSEPORT or SO_REUSEADDR
                    672:                         * socket options set.  This heuristic avoids searching
                    673:                         * through all pcbs in the common case of a non-shared
                    674:                         * port.  It assumes that an application will never
                    675:                         * clear these options after setting them.
                    676:                         */
                    677:                        if ((inp->inp_socket->so_options &
                    678:                            (SO_REUSEPORT|SO_REUSEADDR)) == 0)
                    679:                                break;
                    680:                }
                    681:        } else {
                    682:                /*
                    683:                 * Locate pcb for datagram.
                    684:                 */
                    685:                inp = in_pcblookup_connect(&udbtable, *src4, *sport, *dst4, *dport);
                    686:                if (inp == 0) {
                    687:                        ++udpstat.udps_pcbhashmiss;
                    688:                        inp = in_pcblookup_bind(&udbtable, *dst4, *dport);
1.82      itojun    689:                        if (inp == 0)
1.53      itojun    690:                                return rcvcnt;
                    691:                }
                    692:
                    693:                udp4_sendup(m, off, (struct sockaddr *)src, inp->inp_socket);
                    694:                rcvcnt++;
                    695:        }
                    696:
                    697: bad:
                    698:        return rcvcnt;
                    699: }
1.72      itojun    700: #endif
1.53      itojun    701:
                    702: #ifdef INET6
                    703: static int
                    704: udp6_realinput(af, src, dst, m, off)
                    705:        int af;         /* af on packet */
                    706:        struct sockaddr_in6 *src;
                    707:        struct sockaddr_in6 *dst;
                    708:        struct mbuf *m;
                    709:        int off;        /* offset of udphdr */
                    710: {
1.79      itojun    711:        u_int16_t sport, dport;
1.53      itojun    712:        int rcvcnt;
1.79      itojun    713:        struct in6_addr src6, dst6;
                    714:        const struct in_addr *dst4;
1.53      itojun    715:        struct in6pcb *in6p;
                    716:
                    717:        rcvcnt = 0;
                    718:        off += sizeof(struct udphdr);   /* now, offset of payload */
                    719:
                    720:        if (af != AF_INET && af != AF_INET6)
                    721:                goto bad;
                    722:        if (src->sin6_family != AF_INET6 || dst->sin6_family != AF_INET6)
                    723:                goto bad;
                    724:
1.79      itojun    725:        in6_embedscope(&src6, src, NULL, NULL);
                    726:        sport = src->sin6_port;
                    727:        in6_embedscope(&dst6, dst, NULL, NULL);
                    728:        dport = dst->sin6_port;
1.88      itojun    729:        dst4 = (struct in_addr *)&dst->sin6_addr.s6_addr[12];
1.53      itojun    730:
1.79      itojun    731:        if (IN6_IS_ADDR_MULTICAST(&dst6) ||
                    732:            (af == AF_INET && IN_MULTICAST(dst4->s_addr))) {
1.53      itojun    733:                /*
                    734:                 * Deliver a multicast or broadcast datagram to *all* sockets
                    735:                 * for which the local and remote addresses and ports match
                    736:                 * those of the incoming datagram.  This allows more than
                    737:                 * one process to receive multi/broadcasts on the same port.
                    738:                 * (This really ought to be done for unicast datagrams as
                    739:                 * well, but that would cause problems with existing
                    740:                 * applications that open both address-specific sockets and
                    741:                 * a wildcard socket listening to the same port -- they would
                    742:                 * end up receiving duplicates of every unicast datagram.
                    743:                 * Those applications open the multiple sockets to overcome an
                    744:                 * inadequacy of the UDP socket interface, but for backwards
                    745:                 * compatibility we avoid the problem here rather than
                    746:                 * fixing the interface.  Maybe 4.5BSD will remedy this?)
                    747:                 */
                    748:
                    749:                /*
1.92      itojun    750:                 * KAME note: traditionally we dropped udpiphdr from mbuf here.
1.71      itojun    751:                 * we need udpiphdr for IPsec processing so we do that later.
1.53      itojun    752:                 */
                    753:                /*
                    754:                 * Locate pcb(s) for datagram.
                    755:                 */
                    756:                for (in6p = udb6.in6p_next; in6p != &udb6;
                    757:                     in6p = in6p->in6p_next) {
1.79      itojun    758:                        if (in6p->in6p_lport != dport)
1.53      itojun    759:                                continue;
                    760:                        if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) {
1.90      itojun    761:                                if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &dst6))
1.53      itojun    762:                                        continue;
1.92      itojun    763:                        } else {
1.79      itojun    764:                                if (IN6_IS_ADDR_V4MAPPED(&dst6) &&
1.85      itojun    765:                                    (in6p->in6p_flags & IN6P_IPV6_V6ONLY))
1.55      itojun    766:                                        continue;
                    767:                        }
1.53      itojun    768:                        if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
1.79      itojun    769:                                if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr,
                    770:                                    &src6) || in6p->in6p_fport != sport)
1.53      itojun    771:                                        continue;
1.92      itojun    772:                        } else {
1.79      itojun    773:                                if (IN6_IS_ADDR_V4MAPPED(&src6) &&
1.85      itojun    774:                                    (in6p->in6p_flags & IN6P_IPV6_V6ONLY))
1.55      itojun    775:                                        continue;
                    776:                        }
1.53      itojun    777:
                    778:                        udp6_sendup(m, off, (struct sockaddr *)src,
                    779:                                in6p->in6p_socket);
                    780:                        rcvcnt++;
                    781:
                    782:                        /*
                    783:                         * Don't look for additional matches if this one does
                    784:                         * not have either the SO_REUSEPORT or SO_REUSEADDR
                    785:                         * socket options set.  This heuristic avoids searching
                    786:                         * through all pcbs in the common case of a non-shared
                    787:                         * port.  It assumes that an application will never
                    788:                         * clear these options after setting them.
                    789:                         */
                    790:                        if ((in6p->in6p_socket->so_options &
                    791:                            (SO_REUSEPORT|SO_REUSEADDR)) == 0)
                    792:                                break;
                    793:                }
                    794:        } else {
                    795:                /*
                    796:                 * Locate pcb for datagram.
                    797:                 */
1.79      itojun    798:                in6p = in6_pcblookup_connect(&udb6, &src6, sport,
                    799:                    &dst6, dport, 0);
1.53      itojun    800:                if (in6p == 0) {
                    801:                        ++udpstat.udps_pcbhashmiss;
1.79      itojun    802:                        in6p = in6_pcblookup_bind(&udb6, &dst6, dport, 0);
1.82      itojun    803:                        if (in6p == 0)
1.53      itojun    804:                                return rcvcnt;
                    805:                }
                    806:
                    807:                udp6_sendup(m, off, (struct sockaddr *)src, in6p->in6p_socket);
                    808:                rcvcnt++;
                    809:        }
                    810:
                    811: bad:
                    812:        return rcvcnt;
                    813: }
                    814: #endif
1.1       cgd       815:
1.72      itojun    816: #ifdef INET
1.1       cgd       817: /*
                    818:  * Notify a udp user of an asynchronous error;
                    819:  * just wake up so that he can collect error status.
                    820:  */
1.7       mycroft   821: static void
1.1       cgd       822: udp_notify(inp, errno)
1.66      augustss  823:        struct inpcb *inp;
1.7       mycroft   824:        int errno;
1.1       cgd       825: {
1.34      mycroft   826:
1.1       cgd       827:        inp->inp_socket->so_error = errno;
                    828:        sorwakeup(inp->inp_socket);
                    829:        sowwakeup(inp->inp_socket);
                    830: }
                    831:
1.27      christos  832: void *
                    833: udp_ctlinput(cmd, sa, v)
1.1       cgd       834:        int cmd;
                    835:        struct sockaddr *sa;
1.27      christos  836:        void *v;
1.1       cgd       837: {
1.66      augustss  838:        struct ip *ip = v;
                    839:        struct udphdr *uh;
1.18      mycroft   840:        void (*notify) __P((struct inpcb *, int)) = udp_notify;
1.21      mycroft   841:        int errno;
1.1       cgd       842:
1.53      itojun    843:        if (sa->sa_family != AF_INET
                    844:         || sa->sa_len != sizeof(struct sockaddr_in))
1.51      itojun    845:                return NULL;
1.20      mycroft   846:        if ((unsigned)cmd >= PRC_NCMDS)
1.27      christos  847:                return NULL;
1.20      mycroft   848:        errno = inetctlerrmap[cmd];
1.18      mycroft   849:        if (PRC_IS_REDIRECT(cmd))
1.19      mycroft   850:                notify = in_rtchange, ip = 0;
1.18      mycroft   851:        else if (cmd == PRC_HOSTDEAD)
1.19      mycroft   852:                ip = 0;
1.23      cgd       853:        else if (errno == 0)
1.27      christos  854:                return NULL;
1.19      mycroft   855:        if (ip) {
1.1       cgd       856:                uh = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2));
1.34      mycroft   857:                in_pcbnotify(&udbtable, satosin(sa)->sin_addr, uh->uh_dport,
                    858:                    ip->ip_src, uh->uh_sport, errno, notify);
1.53      itojun    859:
                    860:                /* XXX mapped address case */
1.19      mycroft   861:        } else
1.34      mycroft   862:                in_pcbnotifyall(&udbtable, satosin(sa)->sin_addr, errno,
                    863:                    notify);
1.27      christos  864:        return NULL;
1.1       cgd       865: }
                    866:
1.7       mycroft   867: int
1.27      christos  868: #if __STDC__
                    869: udp_output(struct mbuf *m, ...)
                    870: #else
                    871: udp_output(m, va_alist)
                    872:        struct mbuf *m;
                    873:        va_dcl
                    874: #endif
                    875: {
1.66      augustss  876:        struct inpcb *inp;
                    877:        struct udpiphdr *ui;
                    878:        int len = m->m_pkthdr.len;
1.31      mycroft   879:        int error = 0;
1.27      christos  880:        va_list ap;
                    881:
1.98    ! matt      882:        MCLAIM(m, &udp_tx_mowner);
1.27      christos  883:        va_start(ap, m);
                    884:        inp = va_arg(ap, struct inpcb *);
                    885:        va_end(ap);
1.1       cgd       886:
                    887:        /*
                    888:         * Calculate data length and get a mbuf
                    889:         * for UDP and IP headers.
                    890:         */
1.13      mycroft   891:        M_PREPEND(m, sizeof(struct udpiphdr), M_DONTWAIT);
                    892:        if (m == 0) {
                    893:                error = ENOBUFS;
1.39      thorpej   894:                goto release;
                    895:        }
                    896:
                    897:        /*
                    898:         * Compute the packet length of the IP header, and
                    899:         * punt if the length looks bogus.
                    900:         */
1.96      itojun    901:        if (len + sizeof(struct udpiphdr) > IP_MAXPACKET) {
1.39      thorpej   902:                error = EMSGSIZE;
1.13      mycroft   903:                goto release;
                    904:        }
1.1       cgd       905:
                    906:        /*
                    907:         * Fill in mbuf with extended UDP header
                    908:         * and addresses and length put into network format.
                    909:         */
                    910:        ui = mtod(m, struct udpiphdr *);
                    911:        ui->ui_pr = IPPROTO_UDP;
                    912:        ui->ui_src = inp->inp_laddr;
                    913:        ui->ui_dst = inp->inp_faddr;
                    914:        ui->ui_sport = inp->inp_lport;
                    915:        ui->ui_dport = inp->inp_fport;
1.78      thorpej   916:        ui->ui_ulen = htons((u_int16_t)len + sizeof(struct udphdr));
1.1       cgd       917:
                    918:        /*
1.78      thorpej   919:         * Set up checksum and output datagram.
1.1       cgd       920:         */
                    921:        if (udpcksum) {
1.78      thorpej   922:                /*
                    923:                 * XXX Cache pseudo-header checksum part for
                    924:                 * XXX "connected" UDP sockets.
                    925:                 */
                    926:                ui->ui_sum = in_cksum_phdr(ui->ui_src.s_addr,
                    927:                    ui->ui_dst.s_addr, htons((u_int16_t)len +
                    928:                    sizeof(struct udphdr) + IPPROTO_UDP));
                    929:                m->m_pkthdr.csum_flags = M_CSUM_UDPv4;
                    930:                m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum);
                    931:        } else
                    932:                ui->ui_sum = 0;
1.96      itojun    933:        ((struct ip *)ui)->ip_len = htons(sizeof (struct udpiphdr) + len);
1.1       cgd       934:        ((struct ip *)ui)->ip_ttl = inp->inp_ip.ip_ttl; /* XXX */
                    935:        ((struct ip *)ui)->ip_tos = inp->inp_ip.ip_tos; /* XXX */
                    936:        udpstat.udps_opackets++;
1.48      itojun    937:
                    938: #ifdef IPSEC
1.75      itojun    939:        if (ipsec_setsocket(m, inp->inp_socket) != 0) {
                    940:                error = ENOBUFS;
                    941:                goto release;
                    942:        }
1.48      itojun    943: #endif /*IPSEC*/
                    944:
1.31      mycroft   945:        return (ip_output(m, inp->inp_options, &inp->inp_route,
1.12      mycroft   946:            inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST),
1.31      mycroft   947:            inp->inp_moptions));
1.1       cgd       948:
                    949: release:
                    950:        m_freem(m);
                    951:        return (error);
                    952: }
                    953:
1.42      thorpej   954: int    udp_sendspace = 9216;           /* really max datagram size */
                    955: int    udp_recvspace = 40 * (1024 + sizeof(struct sockaddr_in));
1.1       cgd       956:                                        /* 40 1K datagrams */
                    957:
                    958: /*ARGSUSED*/
1.7       mycroft   959: int
1.31      mycroft   960: udp_usrreq(so, req, m, nam, control, p)
1.1       cgd       961:        struct socket *so;
                    962:        int req;
1.31      mycroft   963:        struct mbuf *m, *nam, *control;
1.30      mycroft   964:        struct proc *p;
1.1       cgd       965: {
1.66      augustss  966:        struct inpcb *inp;
1.1       cgd       967:        int s;
1.66      augustss  968:        int error = 0;
1.1       cgd       969:
                    970:        if (req == PRU_CONTROL)
1.31      mycroft   971:                return (in_control(so, (long)m, (caddr_t)nam,
1.30      mycroft   972:                    (struct ifnet *)control, p));
1.59      thorpej   973:
1.60      thorpej   974:        if (req == PRU_PURGEIF) {
1.80      itojun    975:                in_pcbpurgeif0(&udbtable, (struct ifnet *)control);
1.60      thorpej   976:                in_purgeif((struct ifnet *)control);
                    977:                in_pcbpurgeif(&udbtable, (struct ifnet *)control);
1.59      thorpej   978:                return (0);
                    979:        }
1.31      mycroft   980:
                    981:        s = splsoftnet();
                    982:        inp = sotoinpcb(so);
1.32      mycroft   983: #ifdef DIAGNOSTIC
                    984:        if (req != PRU_SEND && req != PRU_SENDOOB && control)
                    985:                panic("udp_usrreq: unexpected control mbuf");
                    986: #endif
1.31      mycroft   987:        if (inp == 0 && req != PRU_ATTACH) {
                    988:                error = EINVAL;
                    989:                goto release;
                    990:        }
                    991:
1.1       cgd       992:        /*
                    993:         * Note: need to block udp_input while changing
                    994:         * the udp pcb queue and/or pcb addresses.
                    995:         */
                    996:        switch (req) {
                    997:
                    998:        case PRU_ATTACH:
1.31      mycroft   999:                if (inp != 0) {
                   1000:                        error = EISCONN;
1.1       cgd      1001:                        break;
                   1002:                }
1.98    ! matt     1003: #ifdef MBUFTRACE
        !          1004:                so->so_mowner = &udp_mowner;
        !          1005:                so->so_rcv.sb_mowner = &udp_rx_mowner;
        !          1006:                so->so_snd.sb_mowner = &udp_tx_mowner;
        !          1007: #endif
1.31      mycroft  1008:                if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
                   1009:                        error = soreserve(so, udp_sendspace, udp_recvspace);
                   1010:                        if (error)
                   1011:                                break;
                   1012:                }
1.18      mycroft  1013:                error = in_pcballoc(so, &udbtable);
1.1       cgd      1014:                if (error)
                   1015:                        break;
1.31      mycroft  1016:                inp = sotoinpcb(so);
                   1017:                inp->inp_ip.ip_ttl = ip_defttl;
1.1       cgd      1018:                break;
                   1019:
                   1020:        case PRU_DETACH:
1.31      mycroft  1021:                in_pcbdetach(inp);
1.1       cgd      1022:                break;
                   1023:
                   1024:        case PRU_BIND:
1.31      mycroft  1025:                error = in_pcbbind(inp, nam, p);
1.1       cgd      1026:                break;
                   1027:
                   1028:        case PRU_LISTEN:
                   1029:                error = EOPNOTSUPP;
                   1030:                break;
                   1031:
                   1032:        case PRU_CONNECT:
1.31      mycroft  1033:                error = in_pcbconnect(inp, nam);
                   1034:                if (error)
1.1       cgd      1035:                        break;
1.31      mycroft  1036:                soisconnected(so);
1.1       cgd      1037:                break;
                   1038:
                   1039:        case PRU_CONNECT2:
                   1040:                error = EOPNOTSUPP;
                   1041:                break;
                   1042:
                   1043:        case PRU_DISCONNECT:
1.31      mycroft  1044:                /*soisdisconnected(so);*/
                   1045:                so->so_state &= ~SS_ISCONNECTED;        /* XXX */
1.1       cgd      1046:                in_pcbdisconnect(inp);
1.34      mycroft  1047:                inp->inp_laddr = zeroin_addr;           /* XXX */
1.35      mycroft  1048:                in_pcbstate(inp, INP_BOUND);            /* XXX */
1.1       cgd      1049:                break;
                   1050:
                   1051:        case PRU_SHUTDOWN:
                   1052:                socantsendmore(so);
                   1053:                break;
                   1054:
1.31      mycroft  1055:        case PRU_RCVD:
                   1056:                error = EOPNOTSUPP;
1.1       cgd      1057:                break;
                   1058:
1.31      mycroft  1059:        case PRU_SEND:
1.32      mycroft  1060:                if (control && control->m_len) {
                   1061:                        m_freem(control);
                   1062:                        m_freem(m);
                   1063:                        error = EINVAL;
                   1064:                        break;
                   1065:                }
1.31      mycroft  1066:        {
1.35      mycroft  1067:                struct in_addr laddr;                   /* XXX */
1.1       cgd      1068:
1.31      mycroft  1069:                if (nam) {
1.35      mycroft  1070:                        laddr = inp->inp_laddr;         /* XXX */
1.31      mycroft  1071:                        if ((so->so_state & SS_ISCONNECTED) != 0) {
                   1072:                                error = EISCONN;
1.32      mycroft  1073:                                goto die;
1.31      mycroft  1074:                        }
                   1075:                        error = in_pcbconnect(inp, nam);
1.32      mycroft  1076:                        if (error) {
                   1077:                        die:
                   1078:                                m_freem(m);
1.31      mycroft  1079:                                break;
1.32      mycroft  1080:                        }
1.31      mycroft  1081:                } else {
                   1082:                        if ((so->so_state & SS_ISCONNECTED) == 0) {
                   1083:                                error = ENOTCONN;
1.32      mycroft  1084:                                goto die;
1.31      mycroft  1085:                        }
                   1086:                }
1.33      mycroft  1087:                error = udp_output(m, inp);
1.31      mycroft  1088:                if (nam) {
                   1089:                        in_pcbdisconnect(inp);
1.35      mycroft  1090:                        inp->inp_laddr = laddr;         /* XXX */
                   1091:                        in_pcbstate(inp, INP_BOUND);    /* XXX */
1.31      mycroft  1092:                }
                   1093:        }
1.1       cgd      1094:                break;
                   1095:
                   1096:        case PRU_SENSE:
                   1097:                /*
                   1098:                 * stat: don't bother with a blocksize.
                   1099:                 */
1.31      mycroft  1100:                splx(s);
1.1       cgd      1101:                return (0);
                   1102:
1.31      mycroft  1103:        case PRU_RCVOOB:
                   1104:                error =  EOPNOTSUPP;
                   1105:                break;
                   1106:
1.1       cgd      1107:        case PRU_SENDOOB:
1.32      mycroft  1108:                m_freem(control);
1.31      mycroft  1109:                m_freem(m);
1.1       cgd      1110:                error =  EOPNOTSUPP;
                   1111:                break;
                   1112:
1.31      mycroft  1113:        case PRU_SOCKADDR:
                   1114:                in_setsockaddr(inp, nam);
                   1115:                break;
                   1116:
                   1117:        case PRU_PEERADDR:
                   1118:                in_setpeeraddr(inp, nam);
                   1119:                break;
1.1       cgd      1120:
                   1121:        default:
                   1122:                panic("udp_usrreq");
                   1123:        }
                   1124:
                   1125: release:
1.31      mycroft  1126:        splx(s);
1.1       cgd      1127:        return (error);
1.13      mycroft  1128: }
                   1129:
                   1130: /*
                   1131:  * Sysctl for udp variables.
                   1132:  */
1.27      christos 1133: int
1.13      mycroft  1134: udp_sysctl(name, namelen, oldp, oldlenp, newp, newlen)
                   1135:        int *name;
                   1136:        u_int namelen;
                   1137:        void *oldp;
                   1138:        size_t *oldlenp;
                   1139:        void *newp;
                   1140:        size_t newlen;
                   1141: {
                   1142:        /* All sysctl names at this level are terminal. */
                   1143:        if (namelen != 1)
                   1144:                return (ENOTDIR);
                   1145:
                   1146:        switch (name[0]) {
                   1147:        case UDPCTL_CHECKSUM:
                   1148:                return (sysctl_int(oldp, oldlenp, newp, newlen, &udpcksum));
1.42      thorpej  1149:        case UDPCTL_SENDSPACE:
                   1150:                return (sysctl_int(oldp, oldlenp, newp, newlen,
                   1151:                    &udp_sendspace));
                   1152:        case UDPCTL_RECVSPACE:
1.94      itojun   1153:                return (sysctl_int(oldp, oldlenp, newp, newlen,
1.42      thorpej  1154:                    &udp_recvspace));
1.13      mycroft  1155:        default:
                   1156:                return (ENOPROTOOPT);
                   1157:        }
                   1158:        /* NOTREACHED */
1.1       cgd      1159: }
1.72      itojun   1160: #endif

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