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Annotation of src/sys/netinet/udp_usrreq.c, Revision 1.101

1.101   ! martin      1: /*     $NetBSD: udp_usrreq.c,v 1.100 2003/06/15 02:49:34 matt 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>
1.101   ! martin     68: __KERNEL_RCSID(0, "$NetBSD: udp_usrreq.c,v 1.100 2003/06/15 02:49:34 matt 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"
1.101   ! martin     74: #include "opt_mbuftrace.h"
1.1       cgd        75:
1.5       mycroft    76: #include <sys/param.h>
                     77: #include <sys/malloc.h>
                     78: #include <sys/mbuf.h>
                     79: #include <sys/protosw.h>
                     80: #include <sys/socket.h>
                     81: #include <sys/socketvar.h>
1.13      mycroft    82: #include <sys/errno.h>
1.5       mycroft    83: #include <sys/stat.h>
1.27      christos   84: #include <sys/systm.h>
                     85: #include <sys/proc.h>
1.53      itojun     86: #include <sys/domain.h>
1.27      christos   87: #include <sys/sysctl.h>
1.1       cgd        88:
1.5       mycroft    89: #include <net/if.h>
                     90: #include <net/route.h>
1.1       cgd        91:
1.5       mycroft    92: #include <netinet/in.h>
                     93: #include <netinet/in_systm.h>
1.15      cgd        94: #include <netinet/in_var.h>
1.5       mycroft    95: #include <netinet/ip.h>
                     96: #include <netinet/in_pcb.h>
                     97: #include <netinet/ip_var.h>
                     98: #include <netinet/ip_icmp.h>
                     99: #include <netinet/udp.h>
                    100: #include <netinet/udp_var.h>
1.1       cgd       101:
1.53      itojun    102: #ifdef INET6
                    103: #include <netinet/ip6.h>
                    104: #include <netinet/icmp6.h>
                    105: #include <netinet6/ip6_var.h>
                    106: #include <netinet6/in6_pcb.h>
                    107: #include <netinet6/udp6_var.h>
                    108: #endif
                    109:
                    110: #ifndef INET6
                    111: /* always need ip6.h for IP6_EXTHDR_GET */
                    112: #include <netinet/ip6.h>
                    113: #endif
                    114:
1.76      itojun    115: #include "faith.h"
                    116: #if defined(NFAITH) && NFAITH > 0
                    117: #include <net/if_faith.h>
                    118: #endif
                    119:
1.27      christos  120: #include <machine/stdarg.h>
                    121:
1.48      itojun    122: #ifdef IPSEC
                    123: #include <netinet6/ipsec.h>
                    124: #include <netkey/key.h>
                    125: #endif /*IPSEC*/
                    126:
1.64      ws        127: #ifdef IPKDB
                    128: #include <ipkdb/ipkdb.h>
                    129: #endif
                    130:
1.8       mycroft   131: /*
                    132:  * UDP protocol implementation.
                    133:  * Per RFC 768, August, 1980.
                    134:  */
                    135: #ifndef        COMPAT_42
                    136: int    udpcksum = 1;
                    137: #else
                    138: int    udpcksum = 0;           /* XXX */
                    139: #endif
1.93      matt      140:
                    141: struct inpcbtable udbtable;
                    142: struct udpstat udpstat;
1.8       mycroft   143:
1.72      itojun    144: #ifdef INET
1.53      itojun    145: static void udp4_sendup __P((struct mbuf *, int, struct sockaddr *,
                    146:        struct socket *));
                    147: static int udp4_realinput __P((struct sockaddr_in *, struct sockaddr_in *,
                    148:        struct mbuf *, int));
1.72      itojun    149: #endif
1.53      itojun    150: #ifdef INET6
                    151: static void udp6_sendup __P((struct mbuf *, int, struct sockaddr *,
                    152:        struct socket *));
                    153: static int udp6_realinput __P((int, struct sockaddr_in6 *,
                    154:        struct sockaddr_in6 *, struct mbuf *, int));
                    155: #endif
1.72      itojun    156: #ifdef INET
1.13      mycroft   157: static void udp_notify __P((struct inpcb *, int));
1.72      itojun    158: #endif
1.7       mycroft   159:
1.26      mycroft   160: #ifndef UDBHASHSIZE
                    161: #define        UDBHASHSIZE     128
                    162: #endif
                    163: int    udbhashsize = UDBHASHSIZE;
                    164:
1.98      matt      165: #ifdef MBUFTRACE
                    166: struct mowner udp_mowner = { "udp" };
                    167: struct mowner udp_rx_mowner = { "udp", "rx" };
                    168: struct mowner udp_tx_mowner = { "udp", "tx" };
                    169: #endif
                    170:
1.78      thorpej   171: #ifdef UDP_CSUM_COUNTERS
                    172: #include <sys/device.h>
                    173:
                    174: struct evcnt udp_hwcsum_bad = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
                    175:     NULL, "udp", "hwcsum bad");
                    176: struct evcnt udp_hwcsum_ok = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
                    177:     NULL, "udp", "hwcsum ok");
                    178: struct evcnt udp_hwcsum_data = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
                    179:     NULL, "udp", "hwcsum data");
                    180: struct evcnt udp_swcsum = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
                    181:     NULL, "udp", "swcsum");
                    182:
                    183: #define        UDP_CSUM_COUNTER_INCR(ev)       (ev)->ev_count++
                    184:
                    185: #else
                    186:
                    187: #define        UDP_CSUM_COUNTER_INCR(ev)       /* nothing */
                    188:
                    189: #endif /* UDP_CSUM_COUNTERS */
                    190:
1.7       mycroft   191: void
1.1       cgd       192: udp_init()
                    193: {
1.18      mycroft   194:
1.72      itojun    195: #ifdef INET
1.35      mycroft   196:        in_pcbinit(&udbtable, udbhashsize, udbhashsize);
1.72      itojun    197: #endif
1.78      thorpej   198:
                    199: #ifdef UDP_CSUM_COUNTERS
                    200:        evcnt_attach_static(&udp_hwcsum_bad);
                    201:        evcnt_attach_static(&udp_hwcsum_ok);
                    202:        evcnt_attach_static(&udp_hwcsum_data);
                    203:        evcnt_attach_static(&udp_swcsum);
                    204: #endif /* UDP_CSUM_COUNTERS */
1.98      matt      205:
                    206:        MOWNER_ATTACH(&udp_tx_mowner);
                    207:        MOWNER_ATTACH(&udp_rx_mowner);
                    208:        MOWNER_ATTACH(&udp_mowner);
1.1       cgd       209: }
                    210:
1.72      itojun    211: #ifdef INET
1.7       mycroft   212: void
1.27      christos  213: #if __STDC__
                    214: udp_input(struct mbuf *m, ...)
                    215: #else
                    216: udp_input(m, va_alist)
                    217:        struct mbuf *m;
                    218:        va_dcl
                    219: #endif
1.1       cgd       220: {
1.53      itojun    221:        va_list ap;
                    222:        struct sockaddr_in src, dst;
                    223:        struct ip *ip;
                    224:        struct udphdr *uh;
1.97      simonb    225:        int iphlen;
1.53      itojun    226:        int len;
                    227:        int n;
1.96      itojun    228:        u_int16_t ip_len;
1.53      itojun    229:
                    230:        va_start(ap, m);
                    231:        iphlen = va_arg(ap, int);
1.97      simonb    232:        (void)va_arg(ap, int);          /* ignore value, advance ap */
1.53      itojun    233:        va_end(ap);
                    234:
1.98      matt      235:        MCLAIM(m, &udp_rx_mowner);
1.53      itojun    236:        udpstat.udps_ipackets++;
                    237:
                    238:        /*
                    239:         * Get IP and UDP header together in first mbuf.
                    240:         */
                    241:        ip = mtod(m, struct ip *);
                    242:        IP6_EXTHDR_GET(uh, struct udphdr *, m, iphlen, sizeof(struct udphdr));
                    243:        if (uh == NULL) {
                    244:                udpstat.udps_hdrops++;
                    245:                return;
                    246:        }
1.95      thorpej   247:        KASSERT(UDP_HDR_ALIGNED_P(uh));
1.53      itojun    248:
1.57      itojun    249:        /* destination port of 0 is illegal, based on RFC768. */
                    250:        if (uh->uh_dport == 0)
                    251:                goto bad;
                    252:
1.53      itojun    253:        /*
                    254:         * Make mbuf data length reflect UDP length.
                    255:         * If not enough data to reflect UDP length, drop.
                    256:         */
1.96      itojun    257:        ip_len = ntohs(ip->ip_len);
1.53      itojun    258:        len = ntohs((u_int16_t)uh->uh_ulen);
1.96      itojun    259:        if (ip_len != iphlen + len) {
                    260:                if (ip_len < iphlen + len || len < sizeof(struct udphdr)) {
1.53      itojun    261:                        udpstat.udps_badlen++;
                    262:                        goto bad;
                    263:                }
1.96      itojun    264:                m_adj(m, iphlen + len - ip_len);
1.53      itojun    265:        }
                    266:
                    267:        /*
                    268:         * Checksum extended UDP header and data.
                    269:         */
                    270:        if (uh->uh_sum) {
1.78      thorpej   271:                switch (m->m_pkthdr.csum_flags &
1.84      thorpej   272:                        ((m->m_pkthdr.rcvif->if_csum_flags_rx & M_CSUM_UDPv4) |
1.78      thorpej   273:                         M_CSUM_TCP_UDP_BAD | M_CSUM_DATA)) {
                    274:                case M_CSUM_UDPv4|M_CSUM_TCP_UDP_BAD:
                    275:                        UDP_CSUM_COUNTER_INCR(&udp_hwcsum_bad);
                    276:                        goto badcsum;
                    277:
                    278:                case M_CSUM_UDPv4|M_CSUM_DATA:
                    279:                        UDP_CSUM_COUNTER_INCR(&udp_hwcsum_data);
                    280:                        if ((m->m_pkthdr.csum_data ^ 0xffff) != 0)
                    281:                                goto badcsum;
                    282:                        break;
                    283:
                    284:                case M_CSUM_UDPv4:
                    285:                        /* Checksum was okay. */
                    286:                        UDP_CSUM_COUNTER_INCR(&udp_hwcsum_ok);
                    287:                        break;
                    288:
                    289:                default:
                    290:                        /* Need to compute it ourselves. */
                    291:                        UDP_CSUM_COUNTER_INCR(&udp_swcsum);
                    292:                        if (in4_cksum(m, IPPROTO_UDP, iphlen, len) != 0)
                    293:                                goto badcsum;
                    294:                        break;
1.53      itojun    295:                }
                    296:        }
                    297:
                    298:        /* construct source and dst sockaddrs. */
                    299:        bzero(&src, sizeof(src));
                    300:        src.sin_family = AF_INET;
                    301:        src.sin_len = sizeof(struct sockaddr_in);
                    302:        bcopy(&ip->ip_src, &src.sin_addr, sizeof(src.sin_addr));
                    303:        src.sin_port = uh->uh_sport;
                    304:        bzero(&dst, sizeof(dst));
                    305:        dst.sin_family = AF_INET;
                    306:        dst.sin_len = sizeof(struct sockaddr_in);
                    307:        bcopy(&ip->ip_dst, &dst.sin_addr, sizeof(dst.sin_addr));
                    308:        dst.sin_port = uh->uh_dport;
                    309:
                    310:        n = udp4_realinput(&src, &dst, m, iphlen);
                    311: #ifdef INET6
                    312:        if (IN_MULTICAST(ip->ip_dst.s_addr) || n == 0) {
                    313:                struct sockaddr_in6 src6, dst6;
                    314:
                    315:                bzero(&src6, sizeof(src6));
                    316:                src6.sin6_family = AF_INET6;
                    317:                src6.sin6_len = sizeof(struct sockaddr_in6);
                    318:                src6.sin6_addr.s6_addr[10] = src6.sin6_addr.s6_addr[11] = 0xff;
                    319:                bcopy(&ip->ip_src, &src6.sin6_addr.s6_addr[12],
                    320:                        sizeof(ip->ip_src));
                    321:                src6.sin6_port = uh->uh_sport;
                    322:                bzero(&dst6, sizeof(dst6));
                    323:                dst6.sin6_family = AF_INET6;
                    324:                dst6.sin6_len = sizeof(struct sockaddr_in6);
                    325:                dst6.sin6_addr.s6_addr[10] = dst6.sin6_addr.s6_addr[11] = 0xff;
                    326:                bcopy(&ip->ip_dst, &dst6.sin6_addr.s6_addr[12],
                    327:                        sizeof(ip->ip_dst));
                    328:                dst6.sin6_port = uh->uh_dport;
                    329:
                    330:                n += udp6_realinput(AF_INET, &src6, &dst6, m, iphlen);
                    331:        }
                    332: #endif
                    333:
                    334:        if (n == 0) {
                    335:                if (m->m_flags & (M_BCAST | M_MCAST)) {
                    336:                        udpstat.udps_noportbcast++;
                    337:                        goto bad;
                    338:                }
1.61      itojun    339:                udpstat.udps_noport++;
1.64      ws        340: #ifdef IPKDB
1.53      itojun    341:                if (checkipkdb(&ip->ip_src, uh->uh_sport, uh->uh_dport,
                    342:                                m, iphlen + sizeof(struct udphdr),
                    343:                                m->m_pkthdr.len - iphlen - sizeof(struct udphdr))) {
                    344:                        /*
                    345:                         * It was a debugger connect packet,
                    346:                         * just drop it now
                    347:                         */
                    348:                        goto bad;
                    349:                }
                    350: #endif
                    351:                icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0);
                    352:                m = NULL;
                    353:        }
                    354:
                    355: bad:
                    356:        if (m)
                    357:                m_freem(m);
1.78      thorpej   358:        return;
                    359:
                    360: badcsum:
                    361:        m_freem(m);
                    362:        udpstat.udps_badsum++;
1.53      itojun    363: }
1.72      itojun    364: #endif
1.53      itojun    365:
                    366: #ifdef INET6
                    367: int
                    368: udp6_input(mp, offp, proto)
                    369:        struct mbuf **mp;
                    370:        int *offp, proto;
                    371: {
                    372:        struct mbuf *m = *mp;
                    373:        int off = *offp;
                    374:        struct sockaddr_in6 src, dst;
                    375:        struct ip6_hdr *ip6;
                    376:        struct udphdr *uh;
                    377:        u_int32_t plen, ulen;
                    378:
1.76      itojun    379:        ip6 = mtod(m, struct ip6_hdr *);
                    380:
1.53      itojun    381: #if defined(NFAITH) && 0 < NFAITH
1.76      itojun    382:        if (faithprefix(&ip6->ip6_dst)) {
                    383:                /* send icmp6 host unreach? */
                    384:                m_freem(m);
                    385:                return IPPROTO_DONE;
1.53      itojun    386:        }
                    387: #endif
                    388:
                    389:        udp6stat.udp6s_ipackets++;
                    390:
                    391:        /* check for jumbogram is done in ip6_input.  we can trust pkthdr.len */
                    392:        plen = m->m_pkthdr.len - off;
                    393:        IP6_EXTHDR_GET(uh, struct udphdr *, m, off, sizeof(struct udphdr));
                    394:        if (uh == NULL) {
                    395:                ip6stat.ip6s_tooshort++;
                    396:                return IPPROTO_DONE;
                    397:        }
1.95      thorpej   398:        KASSERT(UDP_HDR_ALIGNED_P(uh));
1.53      itojun    399:        ulen = ntohs((u_short)uh->uh_ulen);
1.69      itojun    400:        /*
                    401:         * RFC2675 section 4: jumbograms will have 0 in the UDP header field,
                    402:         * iff payload length > 0xffff.
                    403:         */
1.53      itojun    404:        if (ulen == 0 && plen > 0xffff)
                    405:                ulen = plen;
                    406:
                    407:        if (plen != ulen) {
                    408:                udp6stat.udp6s_badlen++;
1.54      itojun    409:                goto bad;
                    410:        }
                    411:
1.57      itojun    412:        /* destination port of 0 is illegal, based on RFC768. */
                    413:        if (uh->uh_dport == 0)
                    414:                goto bad;
                    415:
1.54      itojun    416:        /* Be proactive about malicious use of IPv4 mapped address */
                    417:        if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
                    418:            IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
                    419:                /* XXX stat */
1.53      itojun    420:                goto bad;
                    421:        }
                    422:
                    423:        /*
                    424:         * Checksum extended UDP header and data.
                    425:         */
                    426:        if (uh->uh_sum == 0)
                    427:                udp6stat.udp6s_nosum++;
                    428:        else if (in6_cksum(m, IPPROTO_UDP, off, ulen) != 0) {
                    429:                udp6stat.udp6s_badsum++;
                    430:                goto bad;
                    431:        }
                    432:
                    433:        /*
                    434:         * Construct source and dst sockaddrs.
                    435:         * Note that ifindex (s6_addr16[1]) is already filled.
                    436:         */
                    437:        bzero(&src, sizeof(src));
                    438:        src.sin6_family = AF_INET6;
                    439:        src.sin6_len = sizeof(struct sockaddr_in6);
1.69      itojun    440:        /* KAME hack: recover scopeid */
                    441:        (void)in6_recoverscope(&src, &ip6->ip6_src, m->m_pkthdr.rcvif);
1.53      itojun    442:        src.sin6_port = uh->uh_sport;
                    443:        bzero(&dst, sizeof(dst));
                    444:        dst.sin6_family = AF_INET6;
                    445:        dst.sin6_len = sizeof(struct sockaddr_in6);
1.69      itojun    446:        /* KAME hack: recover scopeid */
                    447:        (void)in6_recoverscope(&dst, &ip6->ip6_dst, m->m_pkthdr.rcvif);
1.53      itojun    448:        dst.sin6_port = uh->uh_dport;
                    449:
                    450:        if (udp6_realinput(AF_INET6, &src, &dst, m, off) == 0) {
                    451:                if (m->m_flags & M_MCAST) {
                    452:                        udp6stat.udp6s_noportmcast++;
                    453:                        goto bad;
                    454:                }
1.61      itojun    455:                udp6stat.udp6s_noport++;
1.53      itojun    456:                icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0);
                    457:                m = NULL;
                    458:        }
                    459:
                    460: bad:
                    461:        if (m)
                    462:                m_freem(m);
                    463:        return IPPROTO_DONE;
                    464: }
                    465: #endif
                    466:
1.72      itojun    467: #ifdef INET
1.53      itojun    468: static void
                    469: udp4_sendup(m, off, src, so)
                    470:        struct mbuf *m;
                    471:        int off;        /* offset of data portion */
                    472:        struct sockaddr *src;
                    473:        struct socket *so;
                    474: {
                    475:        struct mbuf *opts = NULL;
                    476:        struct mbuf *n;
                    477:        struct inpcb *inp = NULL;
                    478:
                    479:        if (!so)
                    480:                return;
                    481:        switch (so->so_proto->pr_domain->dom_family) {
                    482:        case AF_INET:
                    483:                inp = sotoinpcb(so);
                    484:                break;
                    485: #ifdef INET6
                    486:        case AF_INET6:
                    487:                break;
                    488: #endif
                    489:        default:
                    490:                return;
                    491:        }
                    492:
                    493: #ifdef IPSEC
                    494:        /* check AH/ESP integrity. */
                    495:        if (so != NULL && ipsec4_in_reject_so(m, so)) {
                    496:                ipsecstat.in_polvio++;
                    497:                return;
                    498:        }
                    499: #endif /*IPSEC*/
                    500:
                    501:        if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
                    502:                if (inp && (inp->inp_flags & INP_CONTROLOPTS
                    503:                         || so->so_options & SO_TIMESTAMP)) {
                    504:                        struct ip *ip = mtod(n, struct ip *);
                    505:                        ip_savecontrol(inp, &opts, ip, n);
                    506:                }
                    507:
                    508:                m_adj(n, off);
                    509:                if (sbappendaddr(&so->so_rcv, src, n,
                    510:                                opts) == 0) {
                    511:                        m_freem(n);
                    512:                        if (opts)
                    513:                                m_freem(opts);
1.81      enami     514:                        udpstat.udps_fullsock++;
1.53      itojun    515:                } else
                    516:                        sorwakeup(so);
                    517:        }
                    518: }
1.72      itojun    519: #endif
1.53      itojun    520:
                    521: #ifdef INET6
                    522: static void
                    523: udp6_sendup(m, off, src, so)
                    524:        struct mbuf *m;
                    525:        int off;        /* offset of data portion */
                    526:        struct sockaddr *src;
                    527:        struct socket *so;
                    528: {
                    529:        struct mbuf *opts = NULL;
                    530:        struct mbuf *n;
                    531:        struct in6pcb *in6p = NULL;
                    532:
                    533:        if (!so)
                    534:                return;
                    535:        if (so->so_proto->pr_domain->dom_family != AF_INET6)
                    536:                return;
                    537:        in6p = sotoin6pcb(so);
                    538:
                    539: #ifdef IPSEC
                    540:        /* check AH/ESP integrity. */
                    541:        if (so != NULL && ipsec6_in_reject_so(m, so)) {
                    542:                ipsec6stat.in_polvio++;
                    543:                return;
                    544:        }
                    545: #endif /*IPSEC*/
                    546:
                    547:        if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
                    548:                if (in6p && (in6p->in6p_flags & IN6P_CONTROLOPTS
                    549:                          || in6p->in6p_socket->so_options & SO_TIMESTAMP)) {
                    550:                        struct ip6_hdr *ip6 = mtod(n, struct ip6_hdr *);
                    551:                        ip6_savecontrol(in6p, &opts, ip6, n);
                    552:                }
                    553:
                    554:                m_adj(n, off);
                    555:                if (sbappendaddr(&so->so_rcv, src, n, opts) == 0) {
                    556:                        m_freem(n);
                    557:                        if (opts)
                    558:                                m_freem(opts);
                    559:                        udp6stat.udp6s_fullsock++;
                    560:                } else
                    561:                        sorwakeup(so);
                    562:        }
                    563: }
                    564: #endif
                    565:
1.72      itojun    566: #ifdef INET
1.53      itojun    567: static int
                    568: udp4_realinput(src, dst, m, off)
                    569:        struct sockaddr_in *src;
                    570:        struct sockaddr_in *dst;
                    571:        struct mbuf *m;
                    572:        int off;        /* offset of udphdr */
                    573: {
                    574:        u_int16_t *sport, *dport;
                    575:        int rcvcnt;
                    576:        struct in_addr *src4, *dst4;
                    577:        struct inpcb *inp;
                    578:
                    579:        rcvcnt = 0;
                    580:        off += sizeof(struct udphdr);   /* now, offset of payload */
                    581:
                    582:        if (src->sin_family != AF_INET || dst->sin_family != AF_INET)
                    583:                goto bad;
                    584:
                    585:        src4 = &src->sin_addr;
                    586:        sport = &src->sin_port;
                    587:        dst4 = &dst->sin_addr;
                    588:        dport = &dst->sin_port;
                    589:
1.73      itojun    590:        if (IN_MULTICAST(dst4->s_addr) ||
1.53      itojun    591:            in_broadcast(*dst4, m->m_pkthdr.rcvif)) {
                    592:                /*
                    593:                 * Deliver a multicast or broadcast datagram to *all* sockets
                    594:                 * for which the local and remote addresses and ports match
                    595:                 * those of the incoming datagram.  This allows more than
                    596:                 * one process to receive multi/broadcasts on the same port.
                    597:                 * (This really ought to be done for unicast datagrams as
                    598:                 * well, but that would cause problems with existing
                    599:                 * applications that open both address-specific sockets and
                    600:                 * a wildcard socket listening to the same port -- they would
                    601:                 * end up receiving duplicates of every unicast datagram.
                    602:                 * Those applications open the multiple sockets to overcome an
                    603:                 * inadequacy of the UDP socket interface, but for backwards
                    604:                 * compatibility we avoid the problem here rather than
                    605:                 * fixing the interface.  Maybe 4.5BSD will remedy this?)
                    606:                 */
                    607:
                    608:                /*
1.92      itojun    609:                 * KAME note: traditionally we dropped udpiphdr from mbuf here.
1.71      itojun    610:                 * we need udpiphdr for IPsec processing so we do that later.
1.53      itojun    611:                 */
                    612:                /*
                    613:                 * Locate pcb(s) for datagram.
                    614:                 */
1.89      matt      615:                CIRCLEQ_FOREACH(inp, &udbtable.inpt_queue, inp_queue) {
1.53      itojun    616:                        if (inp->inp_lport != *dport)
                    617:                                continue;
                    618:                        if (!in_nullhost(inp->inp_laddr)) {
                    619:                                if (!in_hosteq(inp->inp_laddr, *dst4))
                    620:                                        continue;
                    621:                        }
                    622:                        if (!in_nullhost(inp->inp_faddr)) {
                    623:                                if (!in_hosteq(inp->inp_faddr, *src4) ||
                    624:                                    inp->inp_fport != *sport)
                    625:                                        continue;
                    626:                        }
                    627:
                    628:                        udp4_sendup(m, off, (struct sockaddr *)src,
                    629:                                inp->inp_socket);
                    630:                        rcvcnt++;
                    631:
                    632:                        /*
                    633:                         * Don't look for additional matches if this one does
                    634:                         * not have either the SO_REUSEPORT or SO_REUSEADDR
                    635:                         * socket options set.  This heuristic avoids searching
                    636:                         * through all pcbs in the common case of a non-shared
                    637:                         * port.  It assumes that an application will never
                    638:                         * clear these options after setting them.
                    639:                         */
                    640:                        if ((inp->inp_socket->so_options &
                    641:                            (SO_REUSEPORT|SO_REUSEADDR)) == 0)
                    642:                                break;
                    643:                }
                    644:        } else {
                    645:                /*
                    646:                 * Locate pcb for datagram.
                    647:                 */
                    648:                inp = in_pcblookup_connect(&udbtable, *src4, *sport, *dst4, *dport);
                    649:                if (inp == 0) {
                    650:                        ++udpstat.udps_pcbhashmiss;
                    651:                        inp = in_pcblookup_bind(&udbtable, *dst4, *dport);
1.82      itojun    652:                        if (inp == 0)
1.53      itojun    653:                                return rcvcnt;
                    654:                }
                    655:
                    656:                udp4_sendup(m, off, (struct sockaddr *)src, inp->inp_socket);
                    657:                rcvcnt++;
                    658:        }
                    659:
                    660: bad:
                    661:        return rcvcnt;
                    662: }
1.72      itojun    663: #endif
1.53      itojun    664:
                    665: #ifdef INET6
                    666: static int
                    667: udp6_realinput(af, src, dst, m, off)
                    668:        int af;         /* af on packet */
                    669:        struct sockaddr_in6 *src;
                    670:        struct sockaddr_in6 *dst;
                    671:        struct mbuf *m;
                    672:        int off;        /* offset of udphdr */
                    673: {
1.79      itojun    674:        u_int16_t sport, dport;
1.53      itojun    675:        int rcvcnt;
1.79      itojun    676:        struct in6_addr src6, dst6;
                    677:        const struct in_addr *dst4;
1.53      itojun    678:        struct in6pcb *in6p;
                    679:
                    680:        rcvcnt = 0;
                    681:        off += sizeof(struct udphdr);   /* now, offset of payload */
                    682:
                    683:        if (af != AF_INET && af != AF_INET6)
                    684:                goto bad;
                    685:        if (src->sin6_family != AF_INET6 || dst->sin6_family != AF_INET6)
                    686:                goto bad;
                    687:
1.79      itojun    688:        in6_embedscope(&src6, src, NULL, NULL);
                    689:        sport = src->sin6_port;
                    690:        in6_embedscope(&dst6, dst, NULL, NULL);
                    691:        dport = dst->sin6_port;
1.88      itojun    692:        dst4 = (struct in_addr *)&dst->sin6_addr.s6_addr[12];
1.53      itojun    693:
1.79      itojun    694:        if (IN6_IS_ADDR_MULTICAST(&dst6) ||
                    695:            (af == AF_INET && IN_MULTICAST(dst4->s_addr))) {
1.53      itojun    696:                /*
                    697:                 * Deliver a multicast or broadcast datagram to *all* sockets
                    698:                 * for which the local and remote addresses and ports match
                    699:                 * those of the incoming datagram.  This allows more than
                    700:                 * one process to receive multi/broadcasts on the same port.
                    701:                 * (This really ought to be done for unicast datagrams as
                    702:                 * well, but that would cause problems with existing
                    703:                 * applications that open both address-specific sockets and
                    704:                 * a wildcard socket listening to the same port -- they would
                    705:                 * end up receiving duplicates of every unicast datagram.
                    706:                 * Those applications open the multiple sockets to overcome an
                    707:                 * inadequacy of the UDP socket interface, but for backwards
                    708:                 * compatibility we avoid the problem here rather than
                    709:                 * fixing the interface.  Maybe 4.5BSD will remedy this?)
                    710:                 */
                    711:
                    712:                /*
1.92      itojun    713:                 * KAME note: traditionally we dropped udpiphdr from mbuf here.
1.71      itojun    714:                 * we need udpiphdr for IPsec processing so we do that later.
1.53      itojun    715:                 */
                    716:                /*
                    717:                 * Locate pcb(s) for datagram.
                    718:                 */
                    719:                for (in6p = udb6.in6p_next; in6p != &udb6;
                    720:                     in6p = in6p->in6p_next) {
1.79      itojun    721:                        if (in6p->in6p_lport != dport)
1.53      itojun    722:                                continue;
                    723:                        if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) {
1.90      itojun    724:                                if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &dst6))
1.53      itojun    725:                                        continue;
1.92      itojun    726:                        } else {
1.79      itojun    727:                                if (IN6_IS_ADDR_V4MAPPED(&dst6) &&
1.85      itojun    728:                                    (in6p->in6p_flags & IN6P_IPV6_V6ONLY))
1.55      itojun    729:                                        continue;
                    730:                        }
1.53      itojun    731:                        if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
1.79      itojun    732:                                if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr,
                    733:                                    &src6) || in6p->in6p_fport != sport)
1.53      itojun    734:                                        continue;
1.92      itojun    735:                        } else {
1.79      itojun    736:                                if (IN6_IS_ADDR_V4MAPPED(&src6) &&
1.85      itojun    737:                                    (in6p->in6p_flags & IN6P_IPV6_V6ONLY))
1.55      itojun    738:                                        continue;
                    739:                        }
1.53      itojun    740:
                    741:                        udp6_sendup(m, off, (struct sockaddr *)src,
                    742:                                in6p->in6p_socket);
                    743:                        rcvcnt++;
                    744:
                    745:                        /*
                    746:                         * Don't look for additional matches if this one does
                    747:                         * not have either the SO_REUSEPORT or SO_REUSEADDR
                    748:                         * socket options set.  This heuristic avoids searching
                    749:                         * through all pcbs in the common case of a non-shared
                    750:                         * port.  It assumes that an application will never
                    751:                         * clear these options after setting them.
                    752:                         */
                    753:                        if ((in6p->in6p_socket->so_options &
                    754:                            (SO_REUSEPORT|SO_REUSEADDR)) == 0)
                    755:                                break;
                    756:                }
                    757:        } else {
                    758:                /*
                    759:                 * Locate pcb for datagram.
                    760:                 */
1.79      itojun    761:                in6p = in6_pcblookup_connect(&udb6, &src6, sport,
                    762:                    &dst6, dport, 0);
1.53      itojun    763:                if (in6p == 0) {
                    764:                        ++udpstat.udps_pcbhashmiss;
1.79      itojun    765:                        in6p = in6_pcblookup_bind(&udb6, &dst6, dport, 0);
1.82      itojun    766:                        if (in6p == 0)
1.53      itojun    767:                                return rcvcnt;
                    768:                }
                    769:
                    770:                udp6_sendup(m, off, (struct sockaddr *)src, in6p->in6p_socket);
                    771:                rcvcnt++;
                    772:        }
                    773:
                    774: bad:
                    775:        return rcvcnt;
                    776: }
                    777: #endif
1.1       cgd       778:
1.72      itojun    779: #ifdef INET
1.1       cgd       780: /*
                    781:  * Notify a udp user of an asynchronous error;
                    782:  * just wake up so that he can collect error status.
                    783:  */
1.7       mycroft   784: static void
1.1       cgd       785: udp_notify(inp, errno)
1.66      augustss  786:        struct inpcb *inp;
1.7       mycroft   787:        int errno;
1.1       cgd       788: {
1.34      mycroft   789:
1.1       cgd       790:        inp->inp_socket->so_error = errno;
                    791:        sorwakeup(inp->inp_socket);
                    792:        sowwakeup(inp->inp_socket);
                    793: }
                    794:
1.27      christos  795: void *
                    796: udp_ctlinput(cmd, sa, v)
1.1       cgd       797:        int cmd;
                    798:        struct sockaddr *sa;
1.27      christos  799:        void *v;
1.1       cgd       800: {
1.66      augustss  801:        struct ip *ip = v;
                    802:        struct udphdr *uh;
1.18      mycroft   803:        void (*notify) __P((struct inpcb *, int)) = udp_notify;
1.21      mycroft   804:        int errno;
1.1       cgd       805:
1.53      itojun    806:        if (sa->sa_family != AF_INET
                    807:         || sa->sa_len != sizeof(struct sockaddr_in))
1.51      itojun    808:                return NULL;
1.20      mycroft   809:        if ((unsigned)cmd >= PRC_NCMDS)
1.27      christos  810:                return NULL;
1.20      mycroft   811:        errno = inetctlerrmap[cmd];
1.18      mycroft   812:        if (PRC_IS_REDIRECT(cmd))
1.19      mycroft   813:                notify = in_rtchange, ip = 0;
1.18      mycroft   814:        else if (cmd == PRC_HOSTDEAD)
1.19      mycroft   815:                ip = 0;
1.23      cgd       816:        else if (errno == 0)
1.27      christos  817:                return NULL;
1.19      mycroft   818:        if (ip) {
1.1       cgd       819:                uh = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2));
1.34      mycroft   820:                in_pcbnotify(&udbtable, satosin(sa)->sin_addr, uh->uh_dport,
                    821:                    ip->ip_src, uh->uh_sport, errno, notify);
1.53      itojun    822:
                    823:                /* XXX mapped address case */
1.19      mycroft   824:        } else
1.34      mycroft   825:                in_pcbnotifyall(&udbtable, satosin(sa)->sin_addr, errno,
                    826:                    notify);
1.27      christos  827:        return NULL;
1.1       cgd       828: }
                    829:
1.7       mycroft   830: int
1.27      christos  831: #if __STDC__
                    832: udp_output(struct mbuf *m, ...)
                    833: #else
                    834: udp_output(m, va_alist)
                    835:        struct mbuf *m;
                    836:        va_dcl
                    837: #endif
                    838: {
1.66      augustss  839:        struct inpcb *inp;
                    840:        struct udpiphdr *ui;
                    841:        int len = m->m_pkthdr.len;
1.31      mycroft   842:        int error = 0;
1.27      christos  843:        va_list ap;
                    844:
1.98      matt      845:        MCLAIM(m, &udp_tx_mowner);
1.27      christos  846:        va_start(ap, m);
                    847:        inp = va_arg(ap, struct inpcb *);
                    848:        va_end(ap);
1.1       cgd       849:
                    850:        /*
                    851:         * Calculate data length and get a mbuf
                    852:         * for UDP and IP headers.
                    853:         */
1.13      mycroft   854:        M_PREPEND(m, sizeof(struct udpiphdr), M_DONTWAIT);
                    855:        if (m == 0) {
                    856:                error = ENOBUFS;
1.39      thorpej   857:                goto release;
                    858:        }
                    859:
                    860:        /*
                    861:         * Compute the packet length of the IP header, and
                    862:         * punt if the length looks bogus.
                    863:         */
1.96      itojun    864:        if (len + sizeof(struct udpiphdr) > IP_MAXPACKET) {
1.39      thorpej   865:                error = EMSGSIZE;
1.13      mycroft   866:                goto release;
                    867:        }
1.1       cgd       868:
                    869:        /*
                    870:         * Fill in mbuf with extended UDP header
                    871:         * and addresses and length put into network format.
                    872:         */
                    873:        ui = mtod(m, struct udpiphdr *);
                    874:        ui->ui_pr = IPPROTO_UDP;
                    875:        ui->ui_src = inp->inp_laddr;
                    876:        ui->ui_dst = inp->inp_faddr;
                    877:        ui->ui_sport = inp->inp_lport;
                    878:        ui->ui_dport = inp->inp_fport;
1.78      thorpej   879:        ui->ui_ulen = htons((u_int16_t)len + sizeof(struct udphdr));
1.1       cgd       880:
                    881:        /*
1.78      thorpej   882:         * Set up checksum and output datagram.
1.1       cgd       883:         */
                    884:        if (udpcksum) {
1.78      thorpej   885:                /*
                    886:                 * XXX Cache pseudo-header checksum part for
                    887:                 * XXX "connected" UDP sockets.
                    888:                 */
                    889:                ui->ui_sum = in_cksum_phdr(ui->ui_src.s_addr,
                    890:                    ui->ui_dst.s_addr, htons((u_int16_t)len +
                    891:                    sizeof(struct udphdr) + IPPROTO_UDP));
                    892:                m->m_pkthdr.csum_flags = M_CSUM_UDPv4;
                    893:                m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum);
                    894:        } else
                    895:                ui->ui_sum = 0;
1.96      itojun    896:        ((struct ip *)ui)->ip_len = htons(sizeof (struct udpiphdr) + len);
1.1       cgd       897:        ((struct ip *)ui)->ip_ttl = inp->inp_ip.ip_ttl; /* XXX */
                    898:        ((struct ip *)ui)->ip_tos = inp->inp_ip.ip_tos; /* XXX */
                    899:        udpstat.udps_opackets++;
1.48      itojun    900:
                    901: #ifdef IPSEC
1.75      itojun    902:        if (ipsec_setsocket(m, inp->inp_socket) != 0) {
                    903:                error = ENOBUFS;
                    904:                goto release;
                    905:        }
1.48      itojun    906: #endif /*IPSEC*/
                    907:
1.31      mycroft   908:        return (ip_output(m, inp->inp_options, &inp->inp_route,
1.12      mycroft   909:            inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST),
1.31      mycroft   910:            inp->inp_moptions));
1.1       cgd       911:
                    912: release:
                    913:        m_freem(m);
                    914:        return (error);
                    915: }
                    916:
1.42      thorpej   917: int    udp_sendspace = 9216;           /* really max datagram size */
                    918: int    udp_recvspace = 40 * (1024 + sizeof(struct sockaddr_in));
1.1       cgd       919:                                        /* 40 1K datagrams */
                    920:
                    921: /*ARGSUSED*/
1.7       mycroft   922: int
1.31      mycroft   923: udp_usrreq(so, req, m, nam, control, p)
1.1       cgd       924:        struct socket *so;
                    925:        int req;
1.31      mycroft   926:        struct mbuf *m, *nam, *control;
1.30      mycroft   927:        struct proc *p;
1.1       cgd       928: {
1.66      augustss  929:        struct inpcb *inp;
1.1       cgd       930:        int s;
1.66      augustss  931:        int error = 0;
1.1       cgd       932:
                    933:        if (req == PRU_CONTROL)
1.31      mycroft   934:                return (in_control(so, (long)m, (caddr_t)nam,
1.30      mycroft   935:                    (struct ifnet *)control, p));
1.59      thorpej   936:
1.60      thorpej   937:        if (req == PRU_PURGEIF) {
1.80      itojun    938:                in_pcbpurgeif0(&udbtable, (struct ifnet *)control);
1.60      thorpej   939:                in_purgeif((struct ifnet *)control);
                    940:                in_pcbpurgeif(&udbtable, (struct ifnet *)control);
1.59      thorpej   941:                return (0);
                    942:        }
1.31      mycroft   943:
                    944:        s = splsoftnet();
                    945:        inp = sotoinpcb(so);
1.32      mycroft   946: #ifdef DIAGNOSTIC
                    947:        if (req != PRU_SEND && req != PRU_SENDOOB && control)
                    948:                panic("udp_usrreq: unexpected control mbuf");
                    949: #endif
1.31      mycroft   950:        if (inp == 0 && req != PRU_ATTACH) {
                    951:                error = EINVAL;
                    952:                goto release;
                    953:        }
                    954:
1.1       cgd       955:        /*
                    956:         * Note: need to block udp_input while changing
                    957:         * the udp pcb queue and/or pcb addresses.
                    958:         */
                    959:        switch (req) {
                    960:
                    961:        case PRU_ATTACH:
1.31      mycroft   962:                if (inp != 0) {
                    963:                        error = EISCONN;
1.1       cgd       964:                        break;
                    965:                }
1.98      matt      966: #ifdef MBUFTRACE
                    967:                so->so_mowner = &udp_mowner;
                    968:                so->so_rcv.sb_mowner = &udp_rx_mowner;
                    969:                so->so_snd.sb_mowner = &udp_tx_mowner;
                    970: #endif
1.31      mycroft   971:                if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
                    972:                        error = soreserve(so, udp_sendspace, udp_recvspace);
                    973:                        if (error)
                    974:                                break;
                    975:                }
1.18      mycroft   976:                error = in_pcballoc(so, &udbtable);
1.1       cgd       977:                if (error)
                    978:                        break;
1.31      mycroft   979:                inp = sotoinpcb(so);
                    980:                inp->inp_ip.ip_ttl = ip_defttl;
1.1       cgd       981:                break;
                    982:
                    983:        case PRU_DETACH:
1.31      mycroft   984:                in_pcbdetach(inp);
1.1       cgd       985:                break;
                    986:
                    987:        case PRU_BIND:
1.31      mycroft   988:                error = in_pcbbind(inp, nam, p);
1.1       cgd       989:                break;
                    990:
                    991:        case PRU_LISTEN:
                    992:                error = EOPNOTSUPP;
                    993:                break;
                    994:
                    995:        case PRU_CONNECT:
1.31      mycroft   996:                error = in_pcbconnect(inp, nam);
                    997:                if (error)
1.1       cgd       998:                        break;
1.31      mycroft   999:                soisconnected(so);
1.1       cgd      1000:                break;
                   1001:
                   1002:        case PRU_CONNECT2:
                   1003:                error = EOPNOTSUPP;
                   1004:                break;
                   1005:
                   1006:        case PRU_DISCONNECT:
1.31      mycroft  1007:                /*soisdisconnected(so);*/
                   1008:                so->so_state &= ~SS_ISCONNECTED;        /* XXX */
1.1       cgd      1009:                in_pcbdisconnect(inp);
1.34      mycroft  1010:                inp->inp_laddr = zeroin_addr;           /* XXX */
1.100     matt     1011:                if (inp->inp_ia != NULL) {
                   1012:                        LIST_REMOVE(inp, inp_ialink);
                   1013:                        IFAFREE(&inp->inp_ia->ia_ifa);
                   1014:                        inp->inp_ia = NULL;
                   1015:                }
1.35      mycroft  1016:                in_pcbstate(inp, INP_BOUND);            /* XXX */
1.1       cgd      1017:                break;
                   1018:
                   1019:        case PRU_SHUTDOWN:
                   1020:                socantsendmore(so);
                   1021:                break;
                   1022:
1.31      mycroft  1023:        case PRU_RCVD:
                   1024:                error = EOPNOTSUPP;
1.1       cgd      1025:                break;
                   1026:
1.31      mycroft  1027:        case PRU_SEND:
1.32      mycroft  1028:                if (control && control->m_len) {
                   1029:                        m_freem(control);
                   1030:                        m_freem(m);
                   1031:                        error = EINVAL;
                   1032:                        break;
                   1033:                }
1.31      mycroft  1034:        {
1.35      mycroft  1035:                struct in_addr laddr;                   /* XXX */
1.1       cgd      1036:
1.31      mycroft  1037:                if (nam) {
1.35      mycroft  1038:                        laddr = inp->inp_laddr;         /* XXX */
1.31      mycroft  1039:                        if ((so->so_state & SS_ISCONNECTED) != 0) {
                   1040:                                error = EISCONN;
1.32      mycroft  1041:                                goto die;
1.31      mycroft  1042:                        }
                   1043:                        error = in_pcbconnect(inp, nam);
1.100     matt     1044:                        if (error)
                   1045:                                goto die;
1.31      mycroft  1046:                } else {
                   1047:                        if ((so->so_state & SS_ISCONNECTED) == 0) {
                   1048:                                error = ENOTCONN;
1.32      mycroft  1049:                                goto die;
1.31      mycroft  1050:                        }
                   1051:                }
1.33      mycroft  1052:                error = udp_output(m, inp);
1.100     matt     1053:                m = NULL;
1.31      mycroft  1054:                if (nam) {
                   1055:                        in_pcbdisconnect(inp);
1.35      mycroft  1056:                        inp->inp_laddr = laddr;         /* XXX */
                   1057:                        in_pcbstate(inp, INP_BOUND);    /* XXX */
1.31      mycroft  1058:                }
1.100     matt     1059:          die:
                   1060:                if (inp->inp_ia != NULL && in_nullhost(inp->inp_laddr)) {
                   1061:                        LIST_REMOVE(inp, inp_ialink);
                   1062:                        IFAFREE(&inp->inp_ia->ia_ifa);
                   1063:                        inp->inp_ia = NULL;
                   1064:                }
                   1065:                if (m)
                   1066:                        m_freem(m);
1.31      mycroft  1067:        }
1.1       cgd      1068:                break;
                   1069:
                   1070:        case PRU_SENSE:
                   1071:                /*
                   1072:                 * stat: don't bother with a blocksize.
                   1073:                 */
1.31      mycroft  1074:                splx(s);
1.1       cgd      1075:                return (0);
                   1076:
1.31      mycroft  1077:        case PRU_RCVOOB:
                   1078:                error =  EOPNOTSUPP;
                   1079:                break;
                   1080:
1.1       cgd      1081:        case PRU_SENDOOB:
1.32      mycroft  1082:                m_freem(control);
1.31      mycroft  1083:                m_freem(m);
1.1       cgd      1084:                error =  EOPNOTSUPP;
                   1085:                break;
                   1086:
1.31      mycroft  1087:        case PRU_SOCKADDR:
                   1088:                in_setsockaddr(inp, nam);
                   1089:                break;
                   1090:
                   1091:        case PRU_PEERADDR:
                   1092:                in_setpeeraddr(inp, nam);
                   1093:                break;
1.1       cgd      1094:
                   1095:        default:
                   1096:                panic("udp_usrreq");
                   1097:        }
                   1098:
                   1099: release:
1.31      mycroft  1100:        splx(s);
1.1       cgd      1101:        return (error);
1.13      mycroft  1102: }
                   1103:
                   1104: /*
                   1105:  * Sysctl for udp variables.
                   1106:  */
1.27      christos 1107: int
1.13      mycroft  1108: udp_sysctl(name, namelen, oldp, oldlenp, newp, newlen)
                   1109:        int *name;
                   1110:        u_int namelen;
                   1111:        void *oldp;
                   1112:        size_t *oldlenp;
                   1113:        void *newp;
                   1114:        size_t newlen;
                   1115: {
                   1116:        /* All sysctl names at this level are terminal. */
                   1117:        if (namelen != 1)
                   1118:                return (ENOTDIR);
                   1119:
                   1120:        switch (name[0]) {
                   1121:        case UDPCTL_CHECKSUM:
                   1122:                return (sysctl_int(oldp, oldlenp, newp, newlen, &udpcksum));
1.42      thorpej  1123:        case UDPCTL_SENDSPACE:
                   1124:                return (sysctl_int(oldp, oldlenp, newp, newlen,
                   1125:                    &udp_sendspace));
                   1126:        case UDPCTL_RECVSPACE:
1.94      itojun   1127:                return (sysctl_int(oldp, oldlenp, newp, newlen,
1.42      thorpej  1128:                    &udp_recvspace));
1.13      mycroft  1129:        default:
                   1130:                return (ENOPROTOOPT);
                   1131:        }
                   1132:        /* NOTREACHED */
1.1       cgd      1133: }
1.72      itojun   1134: #endif

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