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Annotation of src/sys/netinet/udp_usrreq.c, Revision 1.105

1.105   ! jonathan    1: /*     $NetBSD: udp_usrreq.c,v 1.104 2003/08/07 16:33:20 agc Exp $     */
1.48      itojun      2:
                      3: /*
                      4:  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
                      5:  * All rights reserved.
1.94      itojun      6:  *
1.48      itojun      7:  * Redistribution and use in source and binary forms, with or without
                      8:  * modification, are permitted provided that the following conditions
                      9:  * are met:
                     10:  * 1. Redistributions of source code must retain the above copyright
                     11:  *    notice, this list of conditions and the following disclaimer.
                     12:  * 2. Redistributions in binary form must reproduce the above copyright
                     13:  *    notice, this list of conditions and the following disclaimer in the
                     14:  *    documentation and/or other materials provided with the distribution.
                     15:  * 3. Neither the name of the project nor the names of its contributors
                     16:  *    may be used to endorse or promote products derived from this software
                     17:  *    without specific prior written permission.
1.94      itojun     18:  *
1.48      itojun     19:  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
                     20:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     21:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     22:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
                     23:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     24:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     25:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     26:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     27:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     28:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     29:  * SUCH DAMAGE.
                     30:  */
1.14      cgd        31:
1.1       cgd        32: /*
1.44      thorpej    33:  * Copyright (c) 1982, 1986, 1988, 1990, 1993, 1995
1.13      mycroft    34:  *     The Regents of the University of California.  All rights reserved.
1.1       cgd        35:  *
                     36:  * Redistribution and use in source and binary forms, with or without
                     37:  * modification, are permitted provided that the following conditions
                     38:  * are met:
                     39:  * 1. Redistributions of source code must retain the above copyright
                     40:  *    notice, this list of conditions and the following disclaimer.
                     41:  * 2. Redistributions in binary form must reproduce the above copyright
                     42:  *    notice, this list of conditions and the following disclaimer in the
                     43:  *    documentation and/or other materials provided with the distribution.
1.104     agc        44:  * 3. Neither the name of the University nor the names of its contributors
1.1       cgd        45:  *    may be used to endorse or promote products derived from this software
                     46:  *    without specific prior written permission.
                     47:  *
                     48:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     49:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     50:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     51:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     52:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     53:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     54:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     55:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     56:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     57:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     58:  * SUCH DAMAGE.
                     59:  *
1.44      thorpej    60:  *     @(#)udp_usrreq.c        8.6 (Berkeley) 5/23/95
1.1       cgd        61:  */
1.91      lukem      62:
                     63: #include <sys/cdefs.h>
1.105   ! jonathan   64: __KERNEL_RCSID(0, "$NetBSD: udp_usrreq.c,v 1.104 2003/08/07 16:33:20 agc Exp $");
1.50      thorpej    65:
1.77      soda       66: #include "opt_inet.h"
1.50      thorpej    67: #include "opt_ipsec.h"
1.78      thorpej    68: #include "opt_inet_csum.h"
1.64      ws         69: #include "opt_ipkdb.h"
1.101     martin     70: #include "opt_mbuftrace.h"
1.1       cgd        71:
1.5       mycroft    72: #include <sys/param.h>
                     73: #include <sys/malloc.h>
                     74: #include <sys/mbuf.h>
                     75: #include <sys/protosw.h>
                     76: #include <sys/socket.h>
                     77: #include <sys/socketvar.h>
1.13      mycroft    78: #include <sys/errno.h>
1.5       mycroft    79: #include <sys/stat.h>
1.27      christos   80: #include <sys/systm.h>
                     81: #include <sys/proc.h>
1.53      itojun     82: #include <sys/domain.h>
1.27      christos   83: #include <sys/sysctl.h>
1.1       cgd        84:
1.5       mycroft    85: #include <net/if.h>
                     86: #include <net/route.h>
1.1       cgd        87:
1.5       mycroft    88: #include <netinet/in.h>
                     89: #include <netinet/in_systm.h>
1.15      cgd        90: #include <netinet/in_var.h>
1.5       mycroft    91: #include <netinet/ip.h>
                     92: #include <netinet/in_pcb.h>
                     93: #include <netinet/ip_var.h>
                     94: #include <netinet/ip_icmp.h>
                     95: #include <netinet/udp.h>
                     96: #include <netinet/udp_var.h>
1.1       cgd        97:
1.53      itojun     98: #ifdef INET6
                     99: #include <netinet/ip6.h>
                    100: #include <netinet/icmp6.h>
                    101: #include <netinet6/ip6_var.h>
                    102: #include <netinet6/in6_pcb.h>
                    103: #include <netinet6/udp6_var.h>
                    104: #endif
                    105:
                    106: #ifndef INET6
                    107: /* always need ip6.h for IP6_EXTHDR_GET */
                    108: #include <netinet/ip6.h>
                    109: #endif
                    110:
1.76      itojun    111: #include "faith.h"
                    112: #if defined(NFAITH) && NFAITH > 0
                    113: #include <net/if_faith.h>
                    114: #endif
                    115:
1.27      christos  116: #include <machine/stdarg.h>
                    117:
1.105   ! jonathan  118: #ifdef FAST_IPSEC
        !           119: #include <netipsec/ipsec.h>
        !           120: #ifdef INET6
        !           121: #include <netipsec/ipsec6.h>
        !           122: #endif
        !           123: #endif /* FAST_IPSEC*/
        !           124:
1.48      itojun    125: #ifdef IPSEC
                    126: #include <netinet6/ipsec.h>
                    127: #include <netkey/key.h>
                    128: #endif /*IPSEC*/
                    129:
1.64      ws        130: #ifdef IPKDB
                    131: #include <ipkdb/ipkdb.h>
                    132: #endif
                    133:
1.8       mycroft   134: /*
                    135:  * UDP protocol implementation.
                    136:  * Per RFC 768, August, 1980.
                    137:  */
                    138: #ifndef        COMPAT_42
                    139: int    udpcksum = 1;
                    140: #else
                    141: int    udpcksum = 0;           /* XXX */
                    142: #endif
1.93      matt      143:
                    144: struct inpcbtable udbtable;
                    145: struct udpstat udpstat;
1.8       mycroft   146:
1.72      itojun    147: #ifdef INET
1.53      itojun    148: static void udp4_sendup __P((struct mbuf *, int, struct sockaddr *,
                    149:        struct socket *));
                    150: static int udp4_realinput __P((struct sockaddr_in *, struct sockaddr_in *,
                    151:        struct mbuf *, int));
1.72      itojun    152: #endif
1.53      itojun    153: #ifdef INET6
                    154: static void udp6_sendup __P((struct mbuf *, int, struct sockaddr *,
                    155:        struct socket *));
                    156: static int udp6_realinput __P((int, struct sockaddr_in6 *,
                    157:        struct sockaddr_in6 *, struct mbuf *, int));
                    158: #endif
1.72      itojun    159: #ifdef INET
1.13      mycroft   160: static void udp_notify __P((struct inpcb *, int));
1.72      itojun    161: #endif
1.7       mycroft   162:
1.26      mycroft   163: #ifndef UDBHASHSIZE
                    164: #define        UDBHASHSIZE     128
                    165: #endif
                    166: int    udbhashsize = UDBHASHSIZE;
                    167:
1.98      matt      168: #ifdef MBUFTRACE
                    169: struct mowner udp_mowner = { "udp" };
                    170: struct mowner udp_rx_mowner = { "udp", "rx" };
                    171: struct mowner udp_tx_mowner = { "udp", "tx" };
                    172: #endif
                    173:
1.78      thorpej   174: #ifdef UDP_CSUM_COUNTERS
                    175: #include <sys/device.h>
                    176:
                    177: struct evcnt udp_hwcsum_bad = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
                    178:     NULL, "udp", "hwcsum bad");
                    179: struct evcnt udp_hwcsum_ok = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
                    180:     NULL, "udp", "hwcsum ok");
                    181: struct evcnt udp_hwcsum_data = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
                    182:     NULL, "udp", "hwcsum data");
                    183: struct evcnt udp_swcsum = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
                    184:     NULL, "udp", "swcsum");
                    185:
                    186: #define        UDP_CSUM_COUNTER_INCR(ev)       (ev)->ev_count++
                    187:
                    188: #else
                    189:
                    190: #define        UDP_CSUM_COUNTER_INCR(ev)       /* nothing */
                    191:
                    192: #endif /* UDP_CSUM_COUNTERS */
                    193:
1.7       mycroft   194: void
1.1       cgd       195: udp_init()
                    196: {
1.18      mycroft   197:
1.72      itojun    198: #ifdef INET
1.35      mycroft   199:        in_pcbinit(&udbtable, udbhashsize, udbhashsize);
1.72      itojun    200: #endif
1.78      thorpej   201:
                    202: #ifdef UDP_CSUM_COUNTERS
                    203:        evcnt_attach_static(&udp_hwcsum_bad);
                    204:        evcnt_attach_static(&udp_hwcsum_ok);
                    205:        evcnt_attach_static(&udp_hwcsum_data);
                    206:        evcnt_attach_static(&udp_swcsum);
                    207: #endif /* UDP_CSUM_COUNTERS */
1.98      matt      208:
                    209:        MOWNER_ATTACH(&udp_tx_mowner);
                    210:        MOWNER_ATTACH(&udp_rx_mowner);
                    211:        MOWNER_ATTACH(&udp_mowner);
1.1       cgd       212: }
                    213:
1.72      itojun    214: #ifdef INET
1.7       mycroft   215: void
1.27      christos  216: #if __STDC__
                    217: udp_input(struct mbuf *m, ...)
                    218: #else
                    219: udp_input(m, va_alist)
                    220:        struct mbuf *m;
                    221:        va_dcl
                    222: #endif
1.1       cgd       223: {
1.53      itojun    224:        va_list ap;
                    225:        struct sockaddr_in src, dst;
                    226:        struct ip *ip;
                    227:        struct udphdr *uh;
1.97      simonb    228:        int iphlen;
1.53      itojun    229:        int len;
                    230:        int n;
1.96      itojun    231:        u_int16_t ip_len;
1.53      itojun    232:
                    233:        va_start(ap, m);
                    234:        iphlen = va_arg(ap, int);
1.97      simonb    235:        (void)va_arg(ap, int);          /* ignore value, advance ap */
1.53      itojun    236:        va_end(ap);
                    237:
1.98      matt      238:        MCLAIM(m, &udp_rx_mowner);
1.53      itojun    239:        udpstat.udps_ipackets++;
                    240:
                    241:        /*
                    242:         * Get IP and UDP header together in first mbuf.
                    243:         */
                    244:        ip = mtod(m, struct ip *);
                    245:        IP6_EXTHDR_GET(uh, struct udphdr *, m, iphlen, sizeof(struct udphdr));
                    246:        if (uh == NULL) {
                    247:                udpstat.udps_hdrops++;
                    248:                return;
                    249:        }
1.95      thorpej   250:        KASSERT(UDP_HDR_ALIGNED_P(uh));
1.53      itojun    251:
1.57      itojun    252:        /* destination port of 0 is illegal, based on RFC768. */
                    253:        if (uh->uh_dport == 0)
                    254:                goto bad;
                    255:
1.53      itojun    256:        /*
                    257:         * Make mbuf data length reflect UDP length.
                    258:         * If not enough data to reflect UDP length, drop.
                    259:         */
1.96      itojun    260:        ip_len = ntohs(ip->ip_len);
1.53      itojun    261:        len = ntohs((u_int16_t)uh->uh_ulen);
1.96      itojun    262:        if (ip_len != iphlen + len) {
                    263:                if (ip_len < iphlen + len || len < sizeof(struct udphdr)) {
1.53      itojun    264:                        udpstat.udps_badlen++;
                    265:                        goto bad;
                    266:                }
1.96      itojun    267:                m_adj(m, iphlen + len - ip_len);
1.53      itojun    268:        }
                    269:
                    270:        /*
                    271:         * Checksum extended UDP header and data.
                    272:         */
                    273:        if (uh->uh_sum) {
1.78      thorpej   274:                switch (m->m_pkthdr.csum_flags &
1.84      thorpej   275:                        ((m->m_pkthdr.rcvif->if_csum_flags_rx & M_CSUM_UDPv4) |
1.78      thorpej   276:                         M_CSUM_TCP_UDP_BAD | M_CSUM_DATA)) {
                    277:                case M_CSUM_UDPv4|M_CSUM_TCP_UDP_BAD:
                    278:                        UDP_CSUM_COUNTER_INCR(&udp_hwcsum_bad);
                    279:                        goto badcsum;
                    280:
                    281:                case M_CSUM_UDPv4|M_CSUM_DATA:
                    282:                        UDP_CSUM_COUNTER_INCR(&udp_hwcsum_data);
                    283:                        if ((m->m_pkthdr.csum_data ^ 0xffff) != 0)
                    284:                                goto badcsum;
                    285:                        break;
                    286:
                    287:                case M_CSUM_UDPv4:
                    288:                        /* Checksum was okay. */
                    289:                        UDP_CSUM_COUNTER_INCR(&udp_hwcsum_ok);
                    290:                        break;
                    291:
                    292:                default:
                    293:                        /* Need to compute it ourselves. */
                    294:                        UDP_CSUM_COUNTER_INCR(&udp_swcsum);
                    295:                        if (in4_cksum(m, IPPROTO_UDP, iphlen, len) != 0)
                    296:                                goto badcsum;
                    297:                        break;
1.53      itojun    298:                }
                    299:        }
                    300:
                    301:        /* construct source and dst sockaddrs. */
                    302:        bzero(&src, sizeof(src));
                    303:        src.sin_family = AF_INET;
                    304:        src.sin_len = sizeof(struct sockaddr_in);
                    305:        bcopy(&ip->ip_src, &src.sin_addr, sizeof(src.sin_addr));
                    306:        src.sin_port = uh->uh_sport;
                    307:        bzero(&dst, sizeof(dst));
                    308:        dst.sin_family = AF_INET;
                    309:        dst.sin_len = sizeof(struct sockaddr_in);
                    310:        bcopy(&ip->ip_dst, &dst.sin_addr, sizeof(dst.sin_addr));
                    311:        dst.sin_port = uh->uh_dport;
                    312:
                    313:        n = udp4_realinput(&src, &dst, m, iphlen);
                    314: #ifdef INET6
                    315:        if (IN_MULTICAST(ip->ip_dst.s_addr) || n == 0) {
                    316:                struct sockaddr_in6 src6, dst6;
                    317:
                    318:                bzero(&src6, sizeof(src6));
                    319:                src6.sin6_family = AF_INET6;
                    320:                src6.sin6_len = sizeof(struct sockaddr_in6);
                    321:                src6.sin6_addr.s6_addr[10] = src6.sin6_addr.s6_addr[11] = 0xff;
                    322:                bcopy(&ip->ip_src, &src6.sin6_addr.s6_addr[12],
                    323:                        sizeof(ip->ip_src));
                    324:                src6.sin6_port = uh->uh_sport;
                    325:                bzero(&dst6, sizeof(dst6));
                    326:                dst6.sin6_family = AF_INET6;
                    327:                dst6.sin6_len = sizeof(struct sockaddr_in6);
                    328:                dst6.sin6_addr.s6_addr[10] = dst6.sin6_addr.s6_addr[11] = 0xff;
                    329:                bcopy(&ip->ip_dst, &dst6.sin6_addr.s6_addr[12],
                    330:                        sizeof(ip->ip_dst));
                    331:                dst6.sin6_port = uh->uh_dport;
                    332:
                    333:                n += udp6_realinput(AF_INET, &src6, &dst6, m, iphlen);
                    334:        }
                    335: #endif
                    336:
                    337:        if (n == 0) {
                    338:                if (m->m_flags & (M_BCAST | M_MCAST)) {
                    339:                        udpstat.udps_noportbcast++;
                    340:                        goto bad;
                    341:                }
1.61      itojun    342:                udpstat.udps_noport++;
1.64      ws        343: #ifdef IPKDB
1.53      itojun    344:                if (checkipkdb(&ip->ip_src, uh->uh_sport, uh->uh_dport,
                    345:                                m, iphlen + sizeof(struct udphdr),
                    346:                                m->m_pkthdr.len - iphlen - sizeof(struct udphdr))) {
                    347:                        /*
                    348:                         * It was a debugger connect packet,
                    349:                         * just drop it now
                    350:                         */
                    351:                        goto bad;
                    352:                }
                    353: #endif
                    354:                icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0);
                    355:                m = NULL;
                    356:        }
                    357:
                    358: bad:
                    359:        if (m)
                    360:                m_freem(m);
1.78      thorpej   361:        return;
                    362:
                    363: badcsum:
                    364:        m_freem(m);
                    365:        udpstat.udps_badsum++;
1.53      itojun    366: }
1.72      itojun    367: #endif
1.53      itojun    368:
                    369: #ifdef INET6
                    370: int
                    371: udp6_input(mp, offp, proto)
                    372:        struct mbuf **mp;
                    373:        int *offp, proto;
                    374: {
                    375:        struct mbuf *m = *mp;
                    376:        int off = *offp;
                    377:        struct sockaddr_in6 src, dst;
                    378:        struct ip6_hdr *ip6;
                    379:        struct udphdr *uh;
                    380:        u_int32_t plen, ulen;
                    381:
1.76      itojun    382:        ip6 = mtod(m, struct ip6_hdr *);
                    383:
1.53      itojun    384: #if defined(NFAITH) && 0 < NFAITH
1.76      itojun    385:        if (faithprefix(&ip6->ip6_dst)) {
                    386:                /* send icmp6 host unreach? */
                    387:                m_freem(m);
                    388:                return IPPROTO_DONE;
1.53      itojun    389:        }
                    390: #endif
                    391:
                    392:        udp6stat.udp6s_ipackets++;
                    393:
                    394:        /* check for jumbogram is done in ip6_input.  we can trust pkthdr.len */
                    395:        plen = m->m_pkthdr.len - off;
                    396:        IP6_EXTHDR_GET(uh, struct udphdr *, m, off, sizeof(struct udphdr));
                    397:        if (uh == NULL) {
                    398:                ip6stat.ip6s_tooshort++;
                    399:                return IPPROTO_DONE;
                    400:        }
1.95      thorpej   401:        KASSERT(UDP_HDR_ALIGNED_P(uh));
1.53      itojun    402:        ulen = ntohs((u_short)uh->uh_ulen);
1.69      itojun    403:        /*
                    404:         * RFC2675 section 4: jumbograms will have 0 in the UDP header field,
                    405:         * iff payload length > 0xffff.
                    406:         */
1.53      itojun    407:        if (ulen == 0 && plen > 0xffff)
                    408:                ulen = plen;
                    409:
                    410:        if (plen != ulen) {
                    411:                udp6stat.udp6s_badlen++;
1.54      itojun    412:                goto bad;
                    413:        }
                    414:
1.57      itojun    415:        /* destination port of 0 is illegal, based on RFC768. */
                    416:        if (uh->uh_dport == 0)
                    417:                goto bad;
                    418:
1.54      itojun    419:        /* Be proactive about malicious use of IPv4 mapped address */
                    420:        if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
                    421:            IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
                    422:                /* XXX stat */
1.53      itojun    423:                goto bad;
                    424:        }
                    425:
                    426:        /*
                    427:         * Checksum extended UDP header and data.
                    428:         */
                    429:        if (uh->uh_sum == 0)
                    430:                udp6stat.udp6s_nosum++;
                    431:        else if (in6_cksum(m, IPPROTO_UDP, off, ulen) != 0) {
                    432:                udp6stat.udp6s_badsum++;
                    433:                goto bad;
                    434:        }
                    435:
                    436:        /*
                    437:         * Construct source and dst sockaddrs.
                    438:         * Note that ifindex (s6_addr16[1]) is already filled.
                    439:         */
                    440:        bzero(&src, sizeof(src));
                    441:        src.sin6_family = AF_INET6;
                    442:        src.sin6_len = sizeof(struct sockaddr_in6);
1.69      itojun    443:        /* KAME hack: recover scopeid */
                    444:        (void)in6_recoverscope(&src, &ip6->ip6_src, m->m_pkthdr.rcvif);
1.53      itojun    445:        src.sin6_port = uh->uh_sport;
                    446:        bzero(&dst, sizeof(dst));
                    447:        dst.sin6_family = AF_INET6;
                    448:        dst.sin6_len = sizeof(struct sockaddr_in6);
1.69      itojun    449:        /* KAME hack: recover scopeid */
                    450:        (void)in6_recoverscope(&dst, &ip6->ip6_dst, m->m_pkthdr.rcvif);
1.53      itojun    451:        dst.sin6_port = uh->uh_dport;
                    452:
                    453:        if (udp6_realinput(AF_INET6, &src, &dst, m, off) == 0) {
                    454:                if (m->m_flags & M_MCAST) {
                    455:                        udp6stat.udp6s_noportmcast++;
                    456:                        goto bad;
                    457:                }
1.61      itojun    458:                udp6stat.udp6s_noport++;
1.53      itojun    459:                icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0);
                    460:                m = NULL;
                    461:        }
                    462:
                    463: bad:
                    464:        if (m)
                    465:                m_freem(m);
                    466:        return IPPROTO_DONE;
                    467: }
                    468: #endif
                    469:
1.72      itojun    470: #ifdef INET
1.53      itojun    471: static void
                    472: udp4_sendup(m, off, src, so)
                    473:        struct mbuf *m;
                    474:        int off;        /* offset of data portion */
                    475:        struct sockaddr *src;
                    476:        struct socket *so;
                    477: {
                    478:        struct mbuf *opts = NULL;
                    479:        struct mbuf *n;
                    480:        struct inpcb *inp = NULL;
                    481:
                    482:        if (!so)
                    483:                return;
                    484:        switch (so->so_proto->pr_domain->dom_family) {
                    485:        case AF_INET:
                    486:                inp = sotoinpcb(so);
                    487:                break;
                    488: #ifdef INET6
                    489:        case AF_INET6:
                    490:                break;
                    491: #endif
                    492:        default:
                    493:                return;
                    494:        }
                    495:
1.105   ! jonathan  496: #if defined(IPSEC) || defined(FAST_IPSEC)
1.53      itojun    497:        /* check AH/ESP integrity. */
                    498:        if (so != NULL && ipsec4_in_reject_so(m, so)) {
                    499:                ipsecstat.in_polvio++;
                    500:                return;
                    501:        }
                    502: #endif /*IPSEC*/
                    503:
                    504:        if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
                    505:                if (inp && (inp->inp_flags & INP_CONTROLOPTS
                    506:                         || so->so_options & SO_TIMESTAMP)) {
                    507:                        struct ip *ip = mtod(n, struct ip *);
                    508:                        ip_savecontrol(inp, &opts, ip, n);
                    509:                }
                    510:
                    511:                m_adj(n, off);
                    512:                if (sbappendaddr(&so->so_rcv, src, n,
                    513:                                opts) == 0) {
                    514:                        m_freem(n);
                    515:                        if (opts)
                    516:                                m_freem(opts);
1.81      enami     517:                        udpstat.udps_fullsock++;
1.53      itojun    518:                } else
                    519:                        sorwakeup(so);
                    520:        }
                    521: }
1.72      itojun    522: #endif
1.53      itojun    523:
                    524: #ifdef INET6
                    525: static void
                    526: udp6_sendup(m, off, src, so)
                    527:        struct mbuf *m;
                    528:        int off;        /* offset of data portion */
                    529:        struct sockaddr *src;
                    530:        struct socket *so;
                    531: {
                    532:        struct mbuf *opts = NULL;
                    533:        struct mbuf *n;
                    534:        struct in6pcb *in6p = NULL;
                    535:
                    536:        if (!so)
                    537:                return;
                    538:        if (so->so_proto->pr_domain->dom_family != AF_INET6)
                    539:                return;
                    540:        in6p = sotoin6pcb(so);
                    541:
1.105   ! jonathan  542: #if defined(IPSEC) || defined(FAST_IPSEC)
1.53      itojun    543:        /* check AH/ESP integrity. */
                    544:        if (so != NULL && ipsec6_in_reject_so(m, so)) {
                    545:                ipsec6stat.in_polvio++;
                    546:                return;
                    547:        }
                    548: #endif /*IPSEC*/
                    549:
                    550:        if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
                    551:                if (in6p && (in6p->in6p_flags & IN6P_CONTROLOPTS
                    552:                          || in6p->in6p_socket->so_options & SO_TIMESTAMP)) {
                    553:                        struct ip6_hdr *ip6 = mtod(n, struct ip6_hdr *);
                    554:                        ip6_savecontrol(in6p, &opts, ip6, n);
                    555:                }
                    556:
                    557:                m_adj(n, off);
                    558:                if (sbappendaddr(&so->so_rcv, src, n, opts) == 0) {
                    559:                        m_freem(n);
                    560:                        if (opts)
                    561:                                m_freem(opts);
                    562:                        udp6stat.udp6s_fullsock++;
                    563:                } else
                    564:                        sorwakeup(so);
                    565:        }
                    566: }
                    567: #endif
                    568:
1.72      itojun    569: #ifdef INET
1.53      itojun    570: static int
                    571: udp4_realinput(src, dst, m, off)
                    572:        struct sockaddr_in *src;
                    573:        struct sockaddr_in *dst;
                    574:        struct mbuf *m;
                    575:        int off;        /* offset of udphdr */
                    576: {
                    577:        u_int16_t *sport, *dport;
                    578:        int rcvcnt;
                    579:        struct in_addr *src4, *dst4;
                    580:        struct inpcb *inp;
                    581:
                    582:        rcvcnt = 0;
                    583:        off += sizeof(struct udphdr);   /* now, offset of payload */
                    584:
                    585:        if (src->sin_family != AF_INET || dst->sin_family != AF_INET)
                    586:                goto bad;
                    587:
                    588:        src4 = &src->sin_addr;
                    589:        sport = &src->sin_port;
                    590:        dst4 = &dst->sin_addr;
                    591:        dport = &dst->sin_port;
                    592:
1.73      itojun    593:        if (IN_MULTICAST(dst4->s_addr) ||
1.53      itojun    594:            in_broadcast(*dst4, m->m_pkthdr.rcvif)) {
                    595:                /*
                    596:                 * Deliver a multicast or broadcast datagram to *all* sockets
                    597:                 * for which the local and remote addresses and ports match
                    598:                 * those of the incoming datagram.  This allows more than
                    599:                 * one process to receive multi/broadcasts on the same port.
                    600:                 * (This really ought to be done for unicast datagrams as
                    601:                 * well, but that would cause problems with existing
                    602:                 * applications that open both address-specific sockets and
                    603:                 * a wildcard socket listening to the same port -- they would
                    604:                 * end up receiving duplicates of every unicast datagram.
                    605:                 * Those applications open the multiple sockets to overcome an
                    606:                 * inadequacy of the UDP socket interface, but for backwards
                    607:                 * compatibility we avoid the problem here rather than
                    608:                 * fixing the interface.  Maybe 4.5BSD will remedy this?)
                    609:                 */
                    610:
                    611:                /*
1.92      itojun    612:                 * KAME note: traditionally we dropped udpiphdr from mbuf here.
1.71      itojun    613:                 * we need udpiphdr for IPsec processing so we do that later.
1.53      itojun    614:                 */
                    615:                /*
                    616:                 * Locate pcb(s) for datagram.
                    617:                 */
1.89      matt      618:                CIRCLEQ_FOREACH(inp, &udbtable.inpt_queue, inp_queue) {
1.53      itojun    619:                        if (inp->inp_lport != *dport)
                    620:                                continue;
                    621:                        if (!in_nullhost(inp->inp_laddr)) {
                    622:                                if (!in_hosteq(inp->inp_laddr, *dst4))
                    623:                                        continue;
                    624:                        }
                    625:                        if (!in_nullhost(inp->inp_faddr)) {
                    626:                                if (!in_hosteq(inp->inp_faddr, *src4) ||
                    627:                                    inp->inp_fport != *sport)
                    628:                                        continue;
                    629:                        }
                    630:
                    631:                        udp4_sendup(m, off, (struct sockaddr *)src,
                    632:                                inp->inp_socket);
                    633:                        rcvcnt++;
                    634:
                    635:                        /*
                    636:                         * Don't look for additional matches if this one does
                    637:                         * not have either the SO_REUSEPORT or SO_REUSEADDR
                    638:                         * socket options set.  This heuristic avoids searching
                    639:                         * through all pcbs in the common case of a non-shared
                    640:                         * port.  It assumes that an application will never
                    641:                         * clear these options after setting them.
                    642:                         */
                    643:                        if ((inp->inp_socket->so_options &
                    644:                            (SO_REUSEPORT|SO_REUSEADDR)) == 0)
                    645:                                break;
                    646:                }
                    647:        } else {
                    648:                /*
                    649:                 * Locate pcb for datagram.
                    650:                 */
                    651:                inp = in_pcblookup_connect(&udbtable, *src4, *sport, *dst4, *dport);
                    652:                if (inp == 0) {
                    653:                        ++udpstat.udps_pcbhashmiss;
                    654:                        inp = in_pcblookup_bind(&udbtable, *dst4, *dport);
1.82      itojun    655:                        if (inp == 0)
1.53      itojun    656:                                return rcvcnt;
                    657:                }
                    658:
                    659:                udp4_sendup(m, off, (struct sockaddr *)src, inp->inp_socket);
                    660:                rcvcnt++;
                    661:        }
                    662:
                    663: bad:
                    664:        return rcvcnt;
                    665: }
1.72      itojun    666: #endif
1.53      itojun    667:
                    668: #ifdef INET6
                    669: static int
                    670: udp6_realinput(af, src, dst, m, off)
                    671:        int af;         /* af on packet */
                    672:        struct sockaddr_in6 *src;
                    673:        struct sockaddr_in6 *dst;
                    674:        struct mbuf *m;
                    675:        int off;        /* offset of udphdr */
                    676: {
1.79      itojun    677:        u_int16_t sport, dport;
1.53      itojun    678:        int rcvcnt;
1.79      itojun    679:        struct in6_addr src6, dst6;
                    680:        const struct in_addr *dst4;
1.53      itojun    681:        struct in6pcb *in6p;
                    682:
                    683:        rcvcnt = 0;
                    684:        off += sizeof(struct udphdr);   /* now, offset of payload */
                    685:
                    686:        if (af != AF_INET && af != AF_INET6)
                    687:                goto bad;
                    688:        if (src->sin6_family != AF_INET6 || dst->sin6_family != AF_INET6)
                    689:                goto bad;
                    690:
1.79      itojun    691:        in6_embedscope(&src6, src, NULL, NULL);
                    692:        sport = src->sin6_port;
                    693:        in6_embedscope(&dst6, dst, NULL, NULL);
                    694:        dport = dst->sin6_port;
1.88      itojun    695:        dst4 = (struct in_addr *)&dst->sin6_addr.s6_addr[12];
1.53      itojun    696:
1.79      itojun    697:        if (IN6_IS_ADDR_MULTICAST(&dst6) ||
                    698:            (af == AF_INET && IN_MULTICAST(dst4->s_addr))) {
1.53      itojun    699:                /*
                    700:                 * Deliver a multicast or broadcast datagram to *all* sockets
                    701:                 * for which the local and remote addresses and ports match
                    702:                 * those of the incoming datagram.  This allows more than
                    703:                 * one process to receive multi/broadcasts on the same port.
                    704:                 * (This really ought to be done for unicast datagrams as
                    705:                 * well, but that would cause problems with existing
                    706:                 * applications that open both address-specific sockets and
                    707:                 * a wildcard socket listening to the same port -- they would
                    708:                 * end up receiving duplicates of every unicast datagram.
                    709:                 * Those applications open the multiple sockets to overcome an
                    710:                 * inadequacy of the UDP socket interface, but for backwards
                    711:                 * compatibility we avoid the problem here rather than
                    712:                 * fixing the interface.  Maybe 4.5BSD will remedy this?)
                    713:                 */
                    714:
                    715:                /*
1.92      itojun    716:                 * KAME note: traditionally we dropped udpiphdr from mbuf here.
1.71      itojun    717:                 * we need udpiphdr for IPsec processing so we do that later.
1.53      itojun    718:                 */
                    719:                /*
                    720:                 * Locate pcb(s) for datagram.
                    721:                 */
                    722:                for (in6p = udb6.in6p_next; in6p != &udb6;
                    723:                     in6p = in6p->in6p_next) {
1.79      itojun    724:                        if (in6p->in6p_lport != dport)
1.53      itojun    725:                                continue;
                    726:                        if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) {
1.90      itojun    727:                                if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &dst6))
1.53      itojun    728:                                        continue;
1.92      itojun    729:                        } else {
1.79      itojun    730:                                if (IN6_IS_ADDR_V4MAPPED(&dst6) &&
1.85      itojun    731:                                    (in6p->in6p_flags & IN6P_IPV6_V6ONLY))
1.55      itojun    732:                                        continue;
                    733:                        }
1.53      itojun    734:                        if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
1.79      itojun    735:                                if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr,
                    736:                                    &src6) || in6p->in6p_fport != sport)
1.53      itojun    737:                                        continue;
1.92      itojun    738:                        } else {
1.79      itojun    739:                                if (IN6_IS_ADDR_V4MAPPED(&src6) &&
1.85      itojun    740:                                    (in6p->in6p_flags & IN6P_IPV6_V6ONLY))
1.55      itojun    741:                                        continue;
                    742:                        }
1.53      itojun    743:
                    744:                        udp6_sendup(m, off, (struct sockaddr *)src,
                    745:                                in6p->in6p_socket);
                    746:                        rcvcnt++;
                    747:
                    748:                        /*
                    749:                         * Don't look for additional matches if this one does
                    750:                         * not have either the SO_REUSEPORT or SO_REUSEADDR
                    751:                         * socket options set.  This heuristic avoids searching
                    752:                         * through all pcbs in the common case of a non-shared
                    753:                         * port.  It assumes that an application will never
                    754:                         * clear these options after setting them.
                    755:                         */
                    756:                        if ((in6p->in6p_socket->so_options &
                    757:                            (SO_REUSEPORT|SO_REUSEADDR)) == 0)
                    758:                                break;
                    759:                }
                    760:        } else {
                    761:                /*
                    762:                 * Locate pcb for datagram.
                    763:                 */
1.79      itojun    764:                in6p = in6_pcblookup_connect(&udb6, &src6, sport,
                    765:                    &dst6, dport, 0);
1.53      itojun    766:                if (in6p == 0) {
                    767:                        ++udpstat.udps_pcbhashmiss;
1.79      itojun    768:                        in6p = in6_pcblookup_bind(&udb6, &dst6, dport, 0);
1.82      itojun    769:                        if (in6p == 0)
1.53      itojun    770:                                return rcvcnt;
                    771:                }
                    772:
                    773:                udp6_sendup(m, off, (struct sockaddr *)src, in6p->in6p_socket);
                    774:                rcvcnt++;
                    775:        }
                    776:
                    777: bad:
                    778:        return rcvcnt;
                    779: }
                    780: #endif
1.1       cgd       781:
1.72      itojun    782: #ifdef INET
1.1       cgd       783: /*
                    784:  * Notify a udp user of an asynchronous error;
                    785:  * just wake up so that he can collect error status.
                    786:  */
1.7       mycroft   787: static void
1.1       cgd       788: udp_notify(inp, errno)
1.66      augustss  789:        struct inpcb *inp;
1.7       mycroft   790:        int errno;
1.1       cgd       791: {
1.34      mycroft   792:
1.1       cgd       793:        inp->inp_socket->so_error = errno;
                    794:        sorwakeup(inp->inp_socket);
                    795:        sowwakeup(inp->inp_socket);
                    796: }
                    797:
1.27      christos  798: void *
                    799: udp_ctlinput(cmd, sa, v)
1.1       cgd       800:        int cmd;
                    801:        struct sockaddr *sa;
1.27      christos  802:        void *v;
1.1       cgd       803: {
1.66      augustss  804:        struct ip *ip = v;
                    805:        struct udphdr *uh;
1.18      mycroft   806:        void (*notify) __P((struct inpcb *, int)) = udp_notify;
1.21      mycroft   807:        int errno;
1.1       cgd       808:
1.53      itojun    809:        if (sa->sa_family != AF_INET
                    810:         || sa->sa_len != sizeof(struct sockaddr_in))
1.51      itojun    811:                return NULL;
1.20      mycroft   812:        if ((unsigned)cmd >= PRC_NCMDS)
1.27      christos  813:                return NULL;
1.20      mycroft   814:        errno = inetctlerrmap[cmd];
1.18      mycroft   815:        if (PRC_IS_REDIRECT(cmd))
1.19      mycroft   816:                notify = in_rtchange, ip = 0;
1.18      mycroft   817:        else if (cmd == PRC_HOSTDEAD)
1.19      mycroft   818:                ip = 0;
1.23      cgd       819:        else if (errno == 0)
1.27      christos  820:                return NULL;
1.19      mycroft   821:        if (ip) {
1.1       cgd       822:                uh = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2));
1.34      mycroft   823:                in_pcbnotify(&udbtable, satosin(sa)->sin_addr, uh->uh_dport,
                    824:                    ip->ip_src, uh->uh_sport, errno, notify);
1.53      itojun    825:
                    826:                /* XXX mapped address case */
1.19      mycroft   827:        } else
1.34      mycroft   828:                in_pcbnotifyall(&udbtable, satosin(sa)->sin_addr, errno,
                    829:                    notify);
1.27      christos  830:        return NULL;
1.1       cgd       831: }
                    832:
1.7       mycroft   833: int
1.27      christos  834: #if __STDC__
                    835: udp_output(struct mbuf *m, ...)
                    836: #else
                    837: udp_output(m, va_alist)
                    838:        struct mbuf *m;
                    839:        va_dcl
                    840: #endif
                    841: {
1.66      augustss  842:        struct inpcb *inp;
                    843:        struct udpiphdr *ui;
                    844:        int len = m->m_pkthdr.len;
1.31      mycroft   845:        int error = 0;
1.27      christos  846:        va_list ap;
                    847:
1.98      matt      848:        MCLAIM(m, &udp_tx_mowner);
1.27      christos  849:        va_start(ap, m);
                    850:        inp = va_arg(ap, struct inpcb *);
                    851:        va_end(ap);
1.1       cgd       852:
                    853:        /*
                    854:         * Calculate data length and get a mbuf
                    855:         * for UDP and IP headers.
                    856:         */
1.13      mycroft   857:        M_PREPEND(m, sizeof(struct udpiphdr), M_DONTWAIT);
                    858:        if (m == 0) {
                    859:                error = ENOBUFS;
1.39      thorpej   860:                goto release;
                    861:        }
                    862:
                    863:        /*
                    864:         * Compute the packet length of the IP header, and
                    865:         * punt if the length looks bogus.
                    866:         */
1.96      itojun    867:        if (len + sizeof(struct udpiphdr) > IP_MAXPACKET) {
1.39      thorpej   868:                error = EMSGSIZE;
1.13      mycroft   869:                goto release;
                    870:        }
1.1       cgd       871:
                    872:        /*
                    873:         * Fill in mbuf with extended UDP header
                    874:         * and addresses and length put into network format.
                    875:         */
                    876:        ui = mtod(m, struct udpiphdr *);
                    877:        ui->ui_pr = IPPROTO_UDP;
                    878:        ui->ui_src = inp->inp_laddr;
                    879:        ui->ui_dst = inp->inp_faddr;
                    880:        ui->ui_sport = inp->inp_lport;
                    881:        ui->ui_dport = inp->inp_fport;
1.78      thorpej   882:        ui->ui_ulen = htons((u_int16_t)len + sizeof(struct udphdr));
1.1       cgd       883:
                    884:        /*
1.78      thorpej   885:         * Set up checksum and output datagram.
1.1       cgd       886:         */
                    887:        if (udpcksum) {
1.78      thorpej   888:                /*
                    889:                 * XXX Cache pseudo-header checksum part for
                    890:                 * XXX "connected" UDP sockets.
                    891:                 */
                    892:                ui->ui_sum = in_cksum_phdr(ui->ui_src.s_addr,
                    893:                    ui->ui_dst.s_addr, htons((u_int16_t)len +
                    894:                    sizeof(struct udphdr) + IPPROTO_UDP));
                    895:                m->m_pkthdr.csum_flags = M_CSUM_UDPv4;
                    896:                m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum);
                    897:        } else
                    898:                ui->ui_sum = 0;
1.96      itojun    899:        ((struct ip *)ui)->ip_len = htons(sizeof (struct udpiphdr) + len);
1.1       cgd       900:        ((struct ip *)ui)->ip_ttl = inp->inp_ip.ip_ttl; /* XXX */
                    901:        ((struct ip *)ui)->ip_tos = inp->inp_ip.ip_tos; /* XXX */
                    902:        udpstat.udps_opackets++;
1.48      itojun    903:
                    904: #ifdef IPSEC
1.75      itojun    905:        if (ipsec_setsocket(m, inp->inp_socket) != 0) {
                    906:                error = ENOBUFS;
                    907:                goto release;
                    908:        }
1.48      itojun    909: #endif /*IPSEC*/
                    910:
1.31      mycroft   911:        return (ip_output(m, inp->inp_options, &inp->inp_route,
1.12      mycroft   912:            inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST),
1.105   ! jonathan  913:            inp->inp_moptions, inp));
1.1       cgd       914:
                    915: release:
                    916:        m_freem(m);
                    917:        return (error);
                    918: }
                    919:
1.42      thorpej   920: int    udp_sendspace = 9216;           /* really max datagram size */
                    921: int    udp_recvspace = 40 * (1024 + sizeof(struct sockaddr_in));
1.1       cgd       922:                                        /* 40 1K datagrams */
                    923:
                    924: /*ARGSUSED*/
1.7       mycroft   925: int
1.103     fvdl      926: udp_usrreq(so, req, m, nam, control, p)
1.1       cgd       927:        struct socket *so;
                    928:        int req;
1.31      mycroft   929:        struct mbuf *m, *nam, *control;
1.103     fvdl      930:        struct proc *p;
1.1       cgd       931: {
1.66      augustss  932:        struct inpcb *inp;
1.1       cgd       933:        int s;
1.66      augustss  934:        int error = 0;
1.1       cgd       935:
                    936:        if (req == PRU_CONTROL)
1.31      mycroft   937:                return (in_control(so, (long)m, (caddr_t)nam,
1.30      mycroft   938:                    (struct ifnet *)control, p));
1.59      thorpej   939:
1.60      thorpej   940:        if (req == PRU_PURGEIF) {
1.80      itojun    941:                in_pcbpurgeif0(&udbtable, (struct ifnet *)control);
1.60      thorpej   942:                in_purgeif((struct ifnet *)control);
                    943:                in_pcbpurgeif(&udbtable, (struct ifnet *)control);
1.59      thorpej   944:                return (0);
                    945:        }
1.31      mycroft   946:
                    947:        s = splsoftnet();
                    948:        inp = sotoinpcb(so);
1.32      mycroft   949: #ifdef DIAGNOSTIC
                    950:        if (req != PRU_SEND && req != PRU_SENDOOB && control)
                    951:                panic("udp_usrreq: unexpected control mbuf");
                    952: #endif
1.31      mycroft   953:        if (inp == 0 && req != PRU_ATTACH) {
                    954:                error = EINVAL;
                    955:                goto release;
                    956:        }
                    957:
1.1       cgd       958:        /*
                    959:         * Note: need to block udp_input while changing
                    960:         * the udp pcb queue and/or pcb addresses.
                    961:         */
                    962:        switch (req) {
                    963:
                    964:        case PRU_ATTACH:
1.31      mycroft   965:                if (inp != 0) {
                    966:                        error = EISCONN;
1.1       cgd       967:                        break;
                    968:                }
1.98      matt      969: #ifdef MBUFTRACE
                    970:                so->so_mowner = &udp_mowner;
                    971:                so->so_rcv.sb_mowner = &udp_rx_mowner;
                    972:                so->so_snd.sb_mowner = &udp_tx_mowner;
                    973: #endif
1.31      mycroft   974:                if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
                    975:                        error = soreserve(so, udp_sendspace, udp_recvspace);
                    976:                        if (error)
                    977:                                break;
                    978:                }
1.18      mycroft   979:                error = in_pcballoc(so, &udbtable);
1.1       cgd       980:                if (error)
                    981:                        break;
1.31      mycroft   982:                inp = sotoinpcb(so);
                    983:                inp->inp_ip.ip_ttl = ip_defttl;
1.1       cgd       984:                break;
                    985:
                    986:        case PRU_DETACH:
1.31      mycroft   987:                in_pcbdetach(inp);
1.1       cgd       988:                break;
                    989:
                    990:        case PRU_BIND:
1.31      mycroft   991:                error = in_pcbbind(inp, nam, p);
1.1       cgd       992:                break;
                    993:
                    994:        case PRU_LISTEN:
                    995:                error = EOPNOTSUPP;
                    996:                break;
                    997:
                    998:        case PRU_CONNECT:
1.31      mycroft   999:                error = in_pcbconnect(inp, nam);
                   1000:                if (error)
1.1       cgd      1001:                        break;
1.31      mycroft  1002:                soisconnected(so);
1.1       cgd      1003:                break;
                   1004:
                   1005:        case PRU_CONNECT2:
                   1006:                error = EOPNOTSUPP;
                   1007:                break;
                   1008:
                   1009:        case PRU_DISCONNECT:
1.31      mycroft  1010:                /*soisdisconnected(so);*/
                   1011:                so->so_state &= ~SS_ISCONNECTED;        /* XXX */
1.1       cgd      1012:                in_pcbdisconnect(inp);
1.34      mycroft  1013:                inp->inp_laddr = zeroin_addr;           /* XXX */
1.100     matt     1014:                if (inp->inp_ia != NULL) {
                   1015:                        LIST_REMOVE(inp, inp_ialink);
                   1016:                        IFAFREE(&inp->inp_ia->ia_ifa);
                   1017:                        inp->inp_ia = NULL;
                   1018:                }
1.35      mycroft  1019:                in_pcbstate(inp, INP_BOUND);            /* XXX */
1.1       cgd      1020:                break;
                   1021:
                   1022:        case PRU_SHUTDOWN:
                   1023:                socantsendmore(so);
                   1024:                break;
                   1025:
1.31      mycroft  1026:        case PRU_RCVD:
                   1027:                error = EOPNOTSUPP;
1.1       cgd      1028:                break;
                   1029:
1.31      mycroft  1030:        case PRU_SEND:
1.32      mycroft  1031:                if (control && control->m_len) {
                   1032:                        m_freem(control);
                   1033:                        m_freem(m);
                   1034:                        error = EINVAL;
                   1035:                        break;
                   1036:                }
1.31      mycroft  1037:        {
1.35      mycroft  1038:                struct in_addr laddr;                   /* XXX */
1.1       cgd      1039:
1.31      mycroft  1040:                if (nam) {
1.35      mycroft  1041:                        laddr = inp->inp_laddr;         /* XXX */
1.31      mycroft  1042:                        if ((so->so_state & SS_ISCONNECTED) != 0) {
                   1043:                                error = EISCONN;
1.32      mycroft  1044:                                goto die;
1.31      mycroft  1045:                        }
                   1046:                        error = in_pcbconnect(inp, nam);
1.100     matt     1047:                        if (error)
                   1048:                                goto die;
1.31      mycroft  1049:                } else {
                   1050:                        if ((so->so_state & SS_ISCONNECTED) == 0) {
                   1051:                                error = ENOTCONN;
1.32      mycroft  1052:                                goto die;
1.31      mycroft  1053:                        }
                   1054:                }
1.33      mycroft  1055:                error = udp_output(m, inp);
1.100     matt     1056:                m = NULL;
1.31      mycroft  1057:                if (nam) {
                   1058:                        in_pcbdisconnect(inp);
1.35      mycroft  1059:                        inp->inp_laddr = laddr;         /* XXX */
                   1060:                        in_pcbstate(inp, INP_BOUND);    /* XXX */
1.31      mycroft  1061:                }
1.100     matt     1062:          die:
                   1063:                if (inp->inp_ia != NULL && in_nullhost(inp->inp_laddr)) {
                   1064:                        LIST_REMOVE(inp, inp_ialink);
                   1065:                        IFAFREE(&inp->inp_ia->ia_ifa);
                   1066:                        inp->inp_ia = NULL;
                   1067:                }
                   1068:                if (m)
                   1069:                        m_freem(m);
1.31      mycroft  1070:        }
1.1       cgd      1071:                break;
                   1072:
                   1073:        case PRU_SENSE:
                   1074:                /*
                   1075:                 * stat: don't bother with a blocksize.
                   1076:                 */
1.31      mycroft  1077:                splx(s);
1.1       cgd      1078:                return (0);
                   1079:
1.31      mycroft  1080:        case PRU_RCVOOB:
                   1081:                error =  EOPNOTSUPP;
                   1082:                break;
                   1083:
1.1       cgd      1084:        case PRU_SENDOOB:
1.32      mycroft  1085:                m_freem(control);
1.31      mycroft  1086:                m_freem(m);
1.1       cgd      1087:                error =  EOPNOTSUPP;
                   1088:                break;
                   1089:
1.31      mycroft  1090:        case PRU_SOCKADDR:
                   1091:                in_setsockaddr(inp, nam);
                   1092:                break;
                   1093:
                   1094:        case PRU_PEERADDR:
                   1095:                in_setpeeraddr(inp, nam);
                   1096:                break;
1.1       cgd      1097:
                   1098:        default:
                   1099:                panic("udp_usrreq");
                   1100:        }
                   1101:
                   1102: release:
1.31      mycroft  1103:        splx(s);
1.1       cgd      1104:        return (error);
1.13      mycroft  1105: }
                   1106:
                   1107: /*
                   1108:  * Sysctl for udp variables.
                   1109:  */
1.27      christos 1110: int
1.13      mycroft  1111: udp_sysctl(name, namelen, oldp, oldlenp, newp, newlen)
                   1112:        int *name;
                   1113:        u_int namelen;
                   1114:        void *oldp;
                   1115:        size_t *oldlenp;
                   1116:        void *newp;
                   1117:        size_t newlen;
                   1118: {
                   1119:        /* All sysctl names at this level are terminal. */
                   1120:        if (namelen != 1)
                   1121:                return (ENOTDIR);
                   1122:
                   1123:        switch (name[0]) {
                   1124:        case UDPCTL_CHECKSUM:
                   1125:                return (sysctl_int(oldp, oldlenp, newp, newlen, &udpcksum));
1.42      thorpej  1126:        case UDPCTL_SENDSPACE:
                   1127:                return (sysctl_int(oldp, oldlenp, newp, newlen,
                   1128:                    &udp_sendspace));
                   1129:        case UDPCTL_RECVSPACE:
1.94      itojun   1130:                return (sysctl_int(oldp, oldlenp, newp, newlen,
1.42      thorpej  1131:                    &udp_recvspace));
1.13      mycroft  1132:        default:
                   1133:                return (ENOPROTOOPT);
                   1134:        }
                   1135:        /* NOTREACHED */
1.1       cgd      1136: }
1.72      itojun   1137: #endif

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