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Annotation of src/sys/netinet/udp_usrreq.c, Revision 1.93

1.93    ! matt        1: /*     $NetBSD: udp_usrreq.c,v 1.92 2001/12/21 02:51:08 itojun Exp $   */
1.48      itojun      2:
                      3: /*
                      4:  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
                      5:  * All rights reserved.
                      6:  *
                      7:  * Redistribution and use in source and binary forms, with or without
                      8:  * modification, are permitted provided that the following conditions
                      9:  * are met:
                     10:  * 1. Redistributions of source code must retain the above copyright
                     11:  *    notice, this list of conditions and the following disclaimer.
                     12:  * 2. Redistributions in binary form must reproduce the above copyright
                     13:  *    notice, this list of conditions and the following disclaimer in the
                     14:  *    documentation and/or other materials provided with the distribution.
                     15:  * 3. Neither the name of the project nor the names of its contributors
                     16:  *    may be used to endorse or promote products derived from this software
                     17:  *    without specific prior written permission.
                     18:  *
                     19:  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
                     20:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     21:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     22:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
                     23:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     24:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     25:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     26:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     27:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     28:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     29:  * SUCH DAMAGE.
                     30:  */
1.14      cgd        31:
1.1       cgd        32: /*
1.44      thorpej    33:  * Copyright (c) 1982, 1986, 1988, 1990, 1993, 1995
1.13      mycroft    34:  *     The Regents of the University of California.  All rights reserved.
1.1       cgd        35:  *
                     36:  * Redistribution and use in source and binary forms, with or without
                     37:  * modification, are permitted provided that the following conditions
                     38:  * are met:
                     39:  * 1. Redistributions of source code must retain the above copyright
                     40:  *    notice, this list of conditions and the following disclaimer.
                     41:  * 2. Redistributions in binary form must reproduce the above copyright
                     42:  *    notice, this list of conditions and the following disclaimer in the
                     43:  *    documentation and/or other materials provided with the distribution.
                     44:  * 3. All advertising materials mentioning features or use of this software
                     45:  *    must display the following acknowledgement:
                     46:  *     This product includes software developed by the University of
                     47:  *     California, Berkeley and its contributors.
                     48:  * 4. Neither the name of the University nor the names of its contributors
                     49:  *    may be used to endorse or promote products derived from this software
                     50:  *    without specific prior written permission.
                     51:  *
                     52:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     53:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     54:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     55:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     56:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     57:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     58:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     59:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     60:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     61:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     62:  * SUCH DAMAGE.
                     63:  *
1.44      thorpej    64:  *     @(#)udp_usrreq.c        8.6 (Berkeley) 5/23/95
1.1       cgd        65:  */
1.91      lukem      66:
                     67: #include <sys/cdefs.h>
1.93    ! matt       68: __KERNEL_RCSID(0, "$NetBSD: udp_usrreq.c,v 1.92 2001/12/21 02:51:08 itojun Exp $");
1.50      thorpej    69:
1.77      soda       70: #include "opt_inet.h"
1.50      thorpej    71: #include "opt_ipsec.h"
1.78      thorpej    72: #include "opt_inet_csum.h"
1.64      ws         73: #include "opt_ipkdb.h"
1.1       cgd        74:
1.5       mycroft    75: #include <sys/param.h>
                     76: #include <sys/malloc.h>
                     77: #include <sys/mbuf.h>
                     78: #include <sys/protosw.h>
                     79: #include <sys/socket.h>
                     80: #include <sys/socketvar.h>
1.13      mycroft    81: #include <sys/errno.h>
1.5       mycroft    82: #include <sys/stat.h>
1.27      christos   83: #include <sys/systm.h>
                     84: #include <sys/proc.h>
1.53      itojun     85: #include <sys/domain.h>
1.27      christos   86: #include <sys/sysctl.h>
1.1       cgd        87:
1.5       mycroft    88: #include <net/if.h>
                     89: #include <net/route.h>
1.1       cgd        90:
1.5       mycroft    91: #include <netinet/in.h>
                     92: #include <netinet/in_systm.h>
1.15      cgd        93: #include <netinet/in_var.h>
1.5       mycroft    94: #include <netinet/ip.h>
                     95: #include <netinet/in_pcb.h>
                     96: #include <netinet/ip_var.h>
                     97: #include <netinet/ip_icmp.h>
                     98: #include <netinet/udp.h>
                     99: #include <netinet/udp_var.h>
1.1       cgd       100:
1.53      itojun    101: #ifdef INET6
                    102: #include <netinet/ip6.h>
                    103: #include <netinet/icmp6.h>
                    104: #include <netinet6/ip6_var.h>
                    105: #include <netinet6/in6_pcb.h>
                    106: #include <netinet6/udp6_var.h>
                    107: #endif
                    108:
                    109: #ifdef PULLDOWN_TEST
                    110: #ifndef INET6
                    111: /* always need ip6.h for IP6_EXTHDR_GET */
                    112: #include <netinet/ip6.h>
                    113: #endif
                    114: #endif
                    115:
1.76      itojun    116: #include "faith.h"
                    117: #if defined(NFAITH) && NFAITH > 0
                    118: #include <net/if_faith.h>
                    119: #endif
                    120:
1.27      christos  121: #include <machine/stdarg.h>
                    122:
1.48      itojun    123: #ifdef IPSEC
                    124: #include <netinet6/ipsec.h>
                    125: #include <netkey/key.h>
                    126: #endif /*IPSEC*/
                    127:
1.64      ws        128: #ifdef IPKDB
                    129: #include <ipkdb/ipkdb.h>
                    130: #endif
                    131:
1.8       mycroft   132: /*
                    133:  * UDP protocol implementation.
                    134:  * Per RFC 768, August, 1980.
                    135:  */
                    136: #ifndef        COMPAT_42
                    137: int    udpcksum = 1;
                    138: #else
                    139: int    udpcksum = 0;           /* XXX */
                    140: #endif
1.93    ! matt      141:
        !           142: struct inpcbtable udbtable;
        !           143: struct udpstat udpstat;
1.8       mycroft   144:
1.72      itojun    145: #ifdef INET
1.53      itojun    146: static void udp4_sendup __P((struct mbuf *, int, struct sockaddr *,
                    147:        struct socket *));
                    148: static int udp4_realinput __P((struct sockaddr_in *, struct sockaddr_in *,
                    149:        struct mbuf *, int));
1.72      itojun    150: #endif
1.53      itojun    151: #ifdef INET6
                    152: static void udp6_sendup __P((struct mbuf *, int, struct sockaddr *,
                    153:        struct socket *));
                    154: static int udp6_realinput __P((int, struct sockaddr_in6 *,
                    155:        struct sockaddr_in6 *, struct mbuf *, int));
                    156: #endif
1.72      itojun    157: #ifdef INET
1.13      mycroft   158: static void udp_notify __P((struct inpcb *, int));
1.72      itojun    159: #endif
1.7       mycroft   160:
1.26      mycroft   161: #ifndef UDBHASHSIZE
                    162: #define        UDBHASHSIZE     128
                    163: #endif
                    164: int    udbhashsize = UDBHASHSIZE;
                    165:
1.78      thorpej   166: #ifdef UDP_CSUM_COUNTERS
                    167: #include <sys/device.h>
                    168:
                    169: struct evcnt udp_hwcsum_bad = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
                    170:     NULL, "udp", "hwcsum bad");
                    171: struct evcnt udp_hwcsum_ok = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
                    172:     NULL, "udp", "hwcsum ok");
                    173: struct evcnt udp_hwcsum_data = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
                    174:     NULL, "udp", "hwcsum data");
                    175: struct evcnt udp_swcsum = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
                    176:     NULL, "udp", "swcsum");
                    177:
                    178: #define        UDP_CSUM_COUNTER_INCR(ev)       (ev)->ev_count++
                    179:
                    180: #else
                    181:
                    182: #define        UDP_CSUM_COUNTER_INCR(ev)       /* nothing */
                    183:
                    184: #endif /* UDP_CSUM_COUNTERS */
                    185:
1.7       mycroft   186: void
1.1       cgd       187: udp_init()
                    188: {
1.18      mycroft   189:
1.72      itojun    190: #ifdef INET
1.35      mycroft   191:        in_pcbinit(&udbtable, udbhashsize, udbhashsize);
1.72      itojun    192: #endif
1.78      thorpej   193:
                    194: #ifdef UDP_CSUM_COUNTERS
                    195:        evcnt_attach_static(&udp_hwcsum_bad);
                    196:        evcnt_attach_static(&udp_hwcsum_ok);
                    197:        evcnt_attach_static(&udp_hwcsum_data);
                    198:        evcnt_attach_static(&udp_swcsum);
                    199: #endif /* UDP_CSUM_COUNTERS */
1.1       cgd       200: }
                    201:
1.72      itojun    202: #ifdef INET
1.7       mycroft   203: void
1.27      christos  204: #if __STDC__
                    205: udp_input(struct mbuf *m, ...)
                    206: #else
                    207: udp_input(m, va_alist)
                    208:        struct mbuf *m;
                    209:        va_dcl
                    210: #endif
1.1       cgd       211: {
1.53      itojun    212:        va_list ap;
                    213:        struct sockaddr_in src, dst;
                    214:        struct ip *ip;
                    215:        struct udphdr *uh;
                    216:        int iphlen, proto;
                    217:        int len;
                    218:        int n;
                    219:
                    220:        va_start(ap, m);
                    221:        iphlen = va_arg(ap, int);
                    222:        proto = va_arg(ap, int);
                    223:        va_end(ap);
                    224:
                    225:        udpstat.udps_ipackets++;
                    226:
                    227: #ifndef PULLDOWN_TEST
                    228:        /*
                    229:         * Strip IP options, if any; should skip this,
                    230:         * make available to user, and use on returned packets,
                    231:         * but we don't yet have a way to check the checksum
                    232:         * with options still present.
                    233:         */
                    234:        if (iphlen > sizeof (struct ip)) {
                    235:                ip_stripoptions(m, (struct mbuf *)0);
                    236:                iphlen = sizeof(struct ip);
                    237:        }
                    238: #else
                    239:        /*
                    240:         * we may enable the above code if we save and pass IPv4 options
                    241:         * to the userland.
                    242:         */
                    243: #endif
                    244:
                    245:        /*
                    246:         * Get IP and UDP header together in first mbuf.
                    247:         */
                    248:        ip = mtod(m, struct ip *);
                    249: #ifndef PULLDOWN_TEST
                    250:        if (m->m_len < iphlen + sizeof(struct udphdr)) {
                    251:                if ((m = m_pullup(m, iphlen + sizeof(struct udphdr))) == 0) {
                    252:                        udpstat.udps_hdrops++;
                    253:                        return;
                    254:                }
                    255:                ip = mtod(m, struct ip *);
                    256:        }
                    257:        uh = (struct udphdr *)((caddr_t)ip + iphlen);
                    258: #else
                    259:        IP6_EXTHDR_GET(uh, struct udphdr *, m, iphlen, sizeof(struct udphdr));
                    260:        if (uh == NULL) {
                    261:                udpstat.udps_hdrops++;
                    262:                return;
                    263:        }
                    264: #endif
                    265:
1.57      itojun    266:        /* destination port of 0 is illegal, based on RFC768. */
                    267:        if (uh->uh_dport == 0)
                    268:                goto bad;
                    269:
1.53      itojun    270:        /*
                    271:         * Make mbuf data length reflect UDP length.
                    272:         * If not enough data to reflect UDP length, drop.
                    273:         */
                    274:        len = ntohs((u_int16_t)uh->uh_ulen);
                    275:        if (ip->ip_len != iphlen + len) {
1.70      sommerfe  276:                if (ip->ip_len < iphlen + len || len < sizeof(struct udphdr)) {
1.53      itojun    277:                        udpstat.udps_badlen++;
                    278:                        goto bad;
                    279:                }
                    280:                m_adj(m, iphlen + len - ip->ip_len);
                    281:        }
                    282:
                    283:        /*
                    284:         * Checksum extended UDP header and data.
                    285:         */
                    286:        if (uh->uh_sum) {
1.78      thorpej   287:                switch (m->m_pkthdr.csum_flags &
1.84      thorpej   288:                        ((m->m_pkthdr.rcvif->if_csum_flags_rx & M_CSUM_UDPv4) |
1.78      thorpej   289:                         M_CSUM_TCP_UDP_BAD | M_CSUM_DATA)) {
                    290:                case M_CSUM_UDPv4|M_CSUM_TCP_UDP_BAD:
                    291:                        UDP_CSUM_COUNTER_INCR(&udp_hwcsum_bad);
                    292:                        goto badcsum;
                    293:
                    294:                case M_CSUM_UDPv4|M_CSUM_DATA:
                    295:                        UDP_CSUM_COUNTER_INCR(&udp_hwcsum_data);
                    296:                        if ((m->m_pkthdr.csum_data ^ 0xffff) != 0)
                    297:                                goto badcsum;
                    298:                        break;
                    299:
                    300:                case M_CSUM_UDPv4:
                    301:                        /* Checksum was okay. */
                    302:                        UDP_CSUM_COUNTER_INCR(&udp_hwcsum_ok);
                    303:                        break;
                    304:
                    305:                default:
                    306:                        /* Need to compute it ourselves. */
                    307:                        UDP_CSUM_COUNTER_INCR(&udp_swcsum);
                    308:                        if (in4_cksum(m, IPPROTO_UDP, iphlen, len) != 0)
                    309:                                goto badcsum;
                    310:                        break;
1.53      itojun    311:                }
                    312:        }
                    313:
                    314:        /* construct source and dst sockaddrs. */
                    315:        bzero(&src, sizeof(src));
                    316:        src.sin_family = AF_INET;
                    317:        src.sin_len = sizeof(struct sockaddr_in);
                    318:        bcopy(&ip->ip_src, &src.sin_addr, sizeof(src.sin_addr));
                    319:        src.sin_port = uh->uh_sport;
                    320:        bzero(&dst, sizeof(dst));
                    321:        dst.sin_family = AF_INET;
                    322:        dst.sin_len = sizeof(struct sockaddr_in);
                    323:        bcopy(&ip->ip_dst, &dst.sin_addr, sizeof(dst.sin_addr));
                    324:        dst.sin_port = uh->uh_dport;
                    325:
                    326:        n = udp4_realinput(&src, &dst, m, iphlen);
                    327: #ifdef INET6
                    328:        if (IN_MULTICAST(ip->ip_dst.s_addr) || n == 0) {
                    329:                struct sockaddr_in6 src6, dst6;
                    330:
                    331:                bzero(&src6, sizeof(src6));
                    332:                src6.sin6_family = AF_INET6;
                    333:                src6.sin6_len = sizeof(struct sockaddr_in6);
                    334:                src6.sin6_addr.s6_addr[10] = src6.sin6_addr.s6_addr[11] = 0xff;
                    335:                bcopy(&ip->ip_src, &src6.sin6_addr.s6_addr[12],
                    336:                        sizeof(ip->ip_src));
                    337:                src6.sin6_port = uh->uh_sport;
                    338:                bzero(&dst6, sizeof(dst6));
                    339:                dst6.sin6_family = AF_INET6;
                    340:                dst6.sin6_len = sizeof(struct sockaddr_in6);
                    341:                dst6.sin6_addr.s6_addr[10] = dst6.sin6_addr.s6_addr[11] = 0xff;
                    342:                bcopy(&ip->ip_dst, &dst6.sin6_addr.s6_addr[12],
                    343:                        sizeof(ip->ip_dst));
                    344:                dst6.sin6_port = uh->uh_dport;
                    345:
                    346:                n += udp6_realinput(AF_INET, &src6, &dst6, m, iphlen);
                    347:        }
                    348: #endif
                    349:
                    350:        if (n == 0) {
                    351:                if (m->m_flags & (M_BCAST | M_MCAST)) {
                    352:                        udpstat.udps_noportbcast++;
                    353:                        goto bad;
                    354:                }
1.61      itojun    355:                udpstat.udps_noport++;
1.64      ws        356: #ifdef IPKDB
1.53      itojun    357:                if (checkipkdb(&ip->ip_src, uh->uh_sport, uh->uh_dport,
                    358:                                m, iphlen + sizeof(struct udphdr),
                    359:                                m->m_pkthdr.len - iphlen - sizeof(struct udphdr))) {
                    360:                        /*
                    361:                         * It was a debugger connect packet,
                    362:                         * just drop it now
                    363:                         */
                    364:                        goto bad;
                    365:                }
                    366: #endif
                    367:                icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0);
                    368:                m = NULL;
                    369:        }
                    370:
                    371: bad:
                    372:        if (m)
                    373:                m_freem(m);
1.78      thorpej   374:        return;
                    375:
                    376: badcsum:
                    377:        m_freem(m);
                    378:        udpstat.udps_badsum++;
1.53      itojun    379: }
1.72      itojun    380: #endif
1.53      itojun    381:
                    382: #ifdef INET6
                    383: int
                    384: udp6_input(mp, offp, proto)
                    385:        struct mbuf **mp;
                    386:        int *offp, proto;
                    387: {
                    388:        struct mbuf *m = *mp;
                    389:        int off = *offp;
                    390:        struct sockaddr_in6 src, dst;
                    391:        struct ip6_hdr *ip6;
                    392:        struct udphdr *uh;
                    393:        u_int32_t plen, ulen;
                    394:
1.76      itojun    395: #ifndef PULLDOWN_TEST
                    396:        IP6_EXTHDR_CHECK(m, off, sizeof(struct udphdr), IPPROTO_DONE);
                    397: #endif
                    398:        ip6 = mtod(m, struct ip6_hdr *);
                    399:
1.53      itojun    400: #if defined(NFAITH) && 0 < NFAITH
1.76      itojun    401:        if (faithprefix(&ip6->ip6_dst)) {
                    402:                /* send icmp6 host unreach? */
                    403:                m_freem(m);
                    404:                return IPPROTO_DONE;
1.53      itojun    405:        }
                    406: #endif
                    407:
                    408:        udp6stat.udp6s_ipackets++;
                    409:
                    410:        /* check for jumbogram is done in ip6_input.  we can trust pkthdr.len */
                    411:        plen = m->m_pkthdr.len - off;
                    412: #ifndef PULLDOWN_TEST
                    413:        uh = (struct udphdr *)((caddr_t)ip6 + off);
                    414: #else
                    415:        IP6_EXTHDR_GET(uh, struct udphdr *, m, off, sizeof(struct udphdr));
                    416:        if (uh == NULL) {
                    417:                ip6stat.ip6s_tooshort++;
                    418:                return IPPROTO_DONE;
                    419:        }
                    420: #endif
                    421:        ulen = ntohs((u_short)uh->uh_ulen);
1.69      itojun    422:        /*
                    423:         * RFC2675 section 4: jumbograms will have 0 in the UDP header field,
                    424:         * iff payload length > 0xffff.
                    425:         */
1.53      itojun    426:        if (ulen == 0 && plen > 0xffff)
                    427:                ulen = plen;
                    428:
                    429:        if (plen != ulen) {
                    430:                udp6stat.udp6s_badlen++;
1.54      itojun    431:                goto bad;
                    432:        }
                    433:
1.57      itojun    434:        /* destination port of 0 is illegal, based on RFC768. */
                    435:        if (uh->uh_dport == 0)
                    436:                goto bad;
                    437:
1.54      itojun    438:        /* Be proactive about malicious use of IPv4 mapped address */
                    439:        if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
                    440:            IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
                    441:                /* XXX stat */
1.53      itojun    442:                goto bad;
                    443:        }
                    444:
                    445:        /*
                    446:         * Checksum extended UDP header and data.
                    447:         */
                    448:        if (uh->uh_sum == 0)
                    449:                udp6stat.udp6s_nosum++;
                    450:        else if (in6_cksum(m, IPPROTO_UDP, off, ulen) != 0) {
                    451:                udp6stat.udp6s_badsum++;
                    452:                goto bad;
                    453:        }
                    454:
                    455:        /*
                    456:         * Construct source and dst sockaddrs.
                    457:         * Note that ifindex (s6_addr16[1]) is already filled.
                    458:         */
                    459:        bzero(&src, sizeof(src));
                    460:        src.sin6_family = AF_INET6;
                    461:        src.sin6_len = sizeof(struct sockaddr_in6);
1.69      itojun    462:        /* KAME hack: recover scopeid */
                    463:        (void)in6_recoverscope(&src, &ip6->ip6_src, m->m_pkthdr.rcvif);
1.53      itojun    464:        src.sin6_port = uh->uh_sport;
                    465:        bzero(&dst, sizeof(dst));
                    466:        dst.sin6_family = AF_INET6;
                    467:        dst.sin6_len = sizeof(struct sockaddr_in6);
1.69      itojun    468:        /* KAME hack: recover scopeid */
                    469:        (void)in6_recoverscope(&dst, &ip6->ip6_dst, m->m_pkthdr.rcvif);
1.53      itojun    470:        dst.sin6_port = uh->uh_dport;
                    471:
                    472:        if (udp6_realinput(AF_INET6, &src, &dst, m, off) == 0) {
                    473:                if (m->m_flags & M_MCAST) {
                    474:                        udp6stat.udp6s_noportmcast++;
                    475:                        goto bad;
                    476:                }
1.61      itojun    477:                udp6stat.udp6s_noport++;
1.53      itojun    478:                icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0);
                    479:                m = NULL;
                    480:        }
                    481:
                    482: bad:
                    483:        if (m)
                    484:                m_freem(m);
                    485:        return IPPROTO_DONE;
                    486: }
                    487: #endif
                    488:
1.72      itojun    489: #ifdef INET
1.53      itojun    490: static void
                    491: udp4_sendup(m, off, src, so)
                    492:        struct mbuf *m;
                    493:        int off;        /* offset of data portion */
                    494:        struct sockaddr *src;
                    495:        struct socket *so;
                    496: {
                    497:        struct mbuf *opts = NULL;
                    498:        struct mbuf *n;
                    499:        struct inpcb *inp = NULL;
                    500: #ifdef INET6
                    501:        struct in6pcb *in6p = NULL;
                    502: #endif
                    503:
                    504:        if (!so)
                    505:                return;
                    506:        switch (so->so_proto->pr_domain->dom_family) {
                    507:        case AF_INET:
                    508:                inp = sotoinpcb(so);
                    509:                break;
                    510: #ifdef INET6
                    511:        case AF_INET6:
                    512:                in6p = sotoin6pcb(so);
                    513:                break;
                    514: #endif
                    515:        default:
                    516:                return;
                    517:        }
                    518:
                    519: #ifdef IPSEC
                    520:        /* check AH/ESP integrity. */
                    521:        if (so != NULL && ipsec4_in_reject_so(m, so)) {
                    522:                ipsecstat.in_polvio++;
                    523:                return;
                    524:        }
                    525: #endif /*IPSEC*/
                    526:
                    527:        if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
                    528:                if (inp && (inp->inp_flags & INP_CONTROLOPTS
                    529:                         || so->so_options & SO_TIMESTAMP)) {
                    530:                        struct ip *ip = mtod(n, struct ip *);
                    531:                        ip_savecontrol(inp, &opts, ip, n);
                    532:                }
                    533:
                    534:                m_adj(n, off);
                    535:                if (sbappendaddr(&so->so_rcv, src, n,
                    536:                                opts) == 0) {
                    537:                        m_freem(n);
                    538:                        if (opts)
                    539:                                m_freem(opts);
1.81      enami     540:                        udpstat.udps_fullsock++;
1.53      itojun    541:                } else
                    542:                        sorwakeup(so);
                    543:        }
                    544: }
1.72      itojun    545: #endif
1.53      itojun    546:
                    547: #ifdef INET6
                    548: static void
                    549: udp6_sendup(m, off, src, so)
                    550:        struct mbuf *m;
                    551:        int off;        /* offset of data portion */
                    552:        struct sockaddr *src;
                    553:        struct socket *so;
                    554: {
                    555:        struct mbuf *opts = NULL;
                    556:        struct mbuf *n;
                    557:        struct in6pcb *in6p = NULL;
                    558:
                    559:        if (!so)
                    560:                return;
                    561:        if (so->so_proto->pr_domain->dom_family != AF_INET6)
                    562:                return;
                    563:        in6p = sotoin6pcb(so);
                    564:
                    565: #ifdef IPSEC
                    566:        /* check AH/ESP integrity. */
                    567:        if (so != NULL && ipsec6_in_reject_so(m, so)) {
                    568:                ipsec6stat.in_polvio++;
                    569:                return;
                    570:        }
                    571: #endif /*IPSEC*/
                    572:
                    573:        if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
                    574:                if (in6p && (in6p->in6p_flags & IN6P_CONTROLOPTS
                    575:                          || in6p->in6p_socket->so_options & SO_TIMESTAMP)) {
                    576:                        struct ip6_hdr *ip6 = mtod(n, struct ip6_hdr *);
                    577:                        ip6_savecontrol(in6p, &opts, ip6, n);
                    578:                }
                    579:
                    580:                m_adj(n, off);
                    581:                if (sbappendaddr(&so->so_rcv, src, n, opts) == 0) {
                    582:                        m_freem(n);
                    583:                        if (opts)
                    584:                                m_freem(opts);
                    585:                        udp6stat.udp6s_fullsock++;
                    586:                } else
                    587:                        sorwakeup(so);
                    588:        }
                    589: }
                    590: #endif
                    591:
1.72      itojun    592: #ifdef INET
1.53      itojun    593: static int
                    594: udp4_realinput(src, dst, m, off)
                    595:        struct sockaddr_in *src;
                    596:        struct sockaddr_in *dst;
                    597:        struct mbuf *m;
                    598:        int off;        /* offset of udphdr */
                    599: {
                    600:        u_int16_t *sport, *dport;
                    601:        int rcvcnt;
                    602:        struct in_addr *src4, *dst4;
                    603:        struct inpcb *inp;
                    604:
                    605:        rcvcnt = 0;
                    606:        off += sizeof(struct udphdr);   /* now, offset of payload */
                    607:
                    608:        if (src->sin_family != AF_INET || dst->sin_family != AF_INET)
                    609:                goto bad;
                    610:
                    611:        src4 = &src->sin_addr;
                    612:        sport = &src->sin_port;
                    613:        dst4 = &dst->sin_addr;
                    614:        dport = &dst->sin_port;
                    615:
1.73      itojun    616:        if (IN_MULTICAST(dst4->s_addr) ||
1.53      itojun    617:            in_broadcast(*dst4, m->m_pkthdr.rcvif)) {
                    618:                struct inpcb *last;
                    619:                /*
                    620:                 * Deliver a multicast or broadcast datagram to *all* sockets
                    621:                 * for which the local and remote addresses and ports match
                    622:                 * those of the incoming datagram.  This allows more than
                    623:                 * one process to receive multi/broadcasts on the same port.
                    624:                 * (This really ought to be done for unicast datagrams as
                    625:                 * well, but that would cause problems with existing
                    626:                 * applications that open both address-specific sockets and
                    627:                 * a wildcard socket listening to the same port -- they would
                    628:                 * end up receiving duplicates of every unicast datagram.
                    629:                 * Those applications open the multiple sockets to overcome an
                    630:                 * inadequacy of the UDP socket interface, but for backwards
                    631:                 * compatibility we avoid the problem here rather than
                    632:                 * fixing the interface.  Maybe 4.5BSD will remedy this?)
                    633:                 */
                    634:
                    635:                /*
1.92      itojun    636:                 * KAME note: traditionally we dropped udpiphdr from mbuf here.
1.71      itojun    637:                 * we need udpiphdr for IPsec processing so we do that later.
1.53      itojun    638:                 */
                    639:                /*
                    640:                 * Locate pcb(s) for datagram.
                    641:                 */
1.89      matt      642:                CIRCLEQ_FOREACH(inp, &udbtable.inpt_queue, inp_queue) {
1.53      itojun    643:                        if (inp->inp_lport != *dport)
                    644:                                continue;
                    645:                        if (!in_nullhost(inp->inp_laddr)) {
                    646:                                if (!in_hosteq(inp->inp_laddr, *dst4))
                    647:                                        continue;
                    648:                        }
                    649:                        if (!in_nullhost(inp->inp_faddr)) {
                    650:                                if (!in_hosteq(inp->inp_faddr, *src4) ||
                    651:                                    inp->inp_fport != *sport)
                    652:                                        continue;
                    653:                        }
                    654:
                    655:                        last = inp;
                    656:                        udp4_sendup(m, off, (struct sockaddr *)src,
                    657:                                inp->inp_socket);
                    658:                        rcvcnt++;
                    659:
                    660:                        /*
                    661:                         * Don't look for additional matches if this one does
                    662:                         * not have either the SO_REUSEPORT or SO_REUSEADDR
                    663:                         * socket options set.  This heuristic avoids searching
                    664:                         * through all pcbs in the common case of a non-shared
                    665:                         * port.  It assumes that an application will never
                    666:                         * clear these options after setting them.
                    667:                         */
                    668:                        if ((inp->inp_socket->so_options &
                    669:                            (SO_REUSEPORT|SO_REUSEADDR)) == 0)
                    670:                                break;
                    671:                }
                    672:        } else {
                    673:                /*
                    674:                 * Locate pcb for datagram.
                    675:                 */
                    676:                inp = in_pcblookup_connect(&udbtable, *src4, *sport, *dst4, *dport);
                    677:                if (inp == 0) {
                    678:                        ++udpstat.udps_pcbhashmiss;
                    679:                        inp = in_pcblookup_bind(&udbtable, *dst4, *dport);
1.82      itojun    680:                        if (inp == 0)
1.53      itojun    681:                                return rcvcnt;
                    682:                }
                    683:
                    684:                udp4_sendup(m, off, (struct sockaddr *)src, inp->inp_socket);
                    685:                rcvcnt++;
                    686:        }
                    687:
                    688: bad:
                    689:        return rcvcnt;
                    690: }
1.72      itojun    691: #endif
1.53      itojun    692:
                    693: #ifdef INET6
                    694: static int
                    695: udp6_realinput(af, src, dst, m, off)
                    696:        int af;         /* af on packet */
                    697:        struct sockaddr_in6 *src;
                    698:        struct sockaddr_in6 *dst;
                    699:        struct mbuf *m;
                    700:        int off;        /* offset of udphdr */
                    701: {
1.79      itojun    702:        u_int16_t sport, dport;
1.53      itojun    703:        int rcvcnt;
1.79      itojun    704:        struct in6_addr src6, dst6;
                    705:        const struct in_addr *dst4;
1.53      itojun    706:        struct in6pcb *in6p;
                    707:
                    708:        rcvcnt = 0;
                    709:        off += sizeof(struct udphdr);   /* now, offset of payload */
                    710:
                    711:        if (af != AF_INET && af != AF_INET6)
                    712:                goto bad;
                    713:        if (src->sin6_family != AF_INET6 || dst->sin6_family != AF_INET6)
                    714:                goto bad;
                    715:
1.79      itojun    716:        in6_embedscope(&src6, src, NULL, NULL);
                    717:        sport = src->sin6_port;
                    718:        in6_embedscope(&dst6, dst, NULL, NULL);
                    719:        dport = dst->sin6_port;
1.88      itojun    720:        dst4 = (struct in_addr *)&dst->sin6_addr.s6_addr[12];
1.53      itojun    721:
1.79      itojun    722:        if (IN6_IS_ADDR_MULTICAST(&dst6) ||
                    723:            (af == AF_INET && IN_MULTICAST(dst4->s_addr))) {
1.53      itojun    724:                struct in6pcb *last;
                    725:                /*
                    726:                 * Deliver a multicast or broadcast datagram to *all* sockets
                    727:                 * for which the local and remote addresses and ports match
                    728:                 * those of the incoming datagram.  This allows more than
                    729:                 * one process to receive multi/broadcasts on the same port.
                    730:                 * (This really ought to be done for unicast datagrams as
                    731:                 * well, but that would cause problems with existing
                    732:                 * applications that open both address-specific sockets and
                    733:                 * a wildcard socket listening to the same port -- they would
                    734:                 * end up receiving duplicates of every unicast datagram.
                    735:                 * Those applications open the multiple sockets to overcome an
                    736:                 * inadequacy of the UDP socket interface, but for backwards
                    737:                 * compatibility we avoid the problem here rather than
                    738:                 * fixing the interface.  Maybe 4.5BSD will remedy this?)
                    739:                 */
                    740:
                    741:                /*
1.92      itojun    742:                 * KAME note: traditionally we dropped udpiphdr from mbuf here.
1.71      itojun    743:                 * we need udpiphdr for IPsec processing so we do that later.
1.53      itojun    744:                 */
                    745:                /*
                    746:                 * Locate pcb(s) for datagram.
                    747:                 */
                    748:                for (in6p = udb6.in6p_next; in6p != &udb6;
                    749:                     in6p = in6p->in6p_next) {
1.79      itojun    750:                        if (in6p->in6p_lport != dport)
1.53      itojun    751:                                continue;
                    752:                        if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) {
1.90      itojun    753:                                if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &dst6))
1.53      itojun    754:                                        continue;
1.92      itojun    755:                        } else {
1.79      itojun    756:                                if (IN6_IS_ADDR_V4MAPPED(&dst6) &&
1.85      itojun    757:                                    (in6p->in6p_flags & IN6P_IPV6_V6ONLY))
1.55      itojun    758:                                        continue;
                    759:                        }
1.53      itojun    760:                        if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
1.79      itojun    761:                                if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr,
                    762:                                    &src6) || in6p->in6p_fport != sport)
1.53      itojun    763:                                        continue;
1.92      itojun    764:                        } else {
1.79      itojun    765:                                if (IN6_IS_ADDR_V4MAPPED(&src6) &&
1.85      itojun    766:                                    (in6p->in6p_flags & IN6P_IPV6_V6ONLY))
1.55      itojun    767:                                        continue;
                    768:                        }
1.53      itojun    769:
                    770:                        last = in6p;
                    771:                        udp6_sendup(m, off, (struct sockaddr *)src,
                    772:                                in6p->in6p_socket);
                    773:                        rcvcnt++;
                    774:
                    775:                        /*
                    776:                         * Don't look for additional matches if this one does
                    777:                         * not have either the SO_REUSEPORT or SO_REUSEADDR
                    778:                         * socket options set.  This heuristic avoids searching
                    779:                         * through all pcbs in the common case of a non-shared
                    780:                         * port.  It assumes that an application will never
                    781:                         * clear these options after setting them.
                    782:                         */
                    783:                        if ((in6p->in6p_socket->so_options &
                    784:                            (SO_REUSEPORT|SO_REUSEADDR)) == 0)
                    785:                                break;
                    786:                }
                    787:        } else {
                    788:                /*
                    789:                 * Locate pcb for datagram.
                    790:                 */
1.79      itojun    791:                in6p = in6_pcblookup_connect(&udb6, &src6, sport,
                    792:                    &dst6, dport, 0);
1.53      itojun    793:                if (in6p == 0) {
                    794:                        ++udpstat.udps_pcbhashmiss;
1.79      itojun    795:                        in6p = in6_pcblookup_bind(&udb6, &dst6, dport, 0);
1.82      itojun    796:                        if (in6p == 0)
1.53      itojun    797:                                return rcvcnt;
                    798:                }
                    799:
                    800:                udp6_sendup(m, off, (struct sockaddr *)src, in6p->in6p_socket);
                    801:                rcvcnt++;
                    802:        }
                    803:
                    804: bad:
                    805:        return rcvcnt;
                    806: }
                    807: #endif
1.1       cgd       808:
1.72      itojun    809: #ifdef INET
1.1       cgd       810: /*
                    811:  * Notify a udp user of an asynchronous error;
                    812:  * just wake up so that he can collect error status.
                    813:  */
1.7       mycroft   814: static void
1.1       cgd       815: udp_notify(inp, errno)
1.66      augustss  816:        struct inpcb *inp;
1.7       mycroft   817:        int errno;
1.1       cgd       818: {
1.34      mycroft   819:
1.1       cgd       820:        inp->inp_socket->so_error = errno;
                    821:        sorwakeup(inp->inp_socket);
                    822:        sowwakeup(inp->inp_socket);
                    823: }
                    824:
1.27      christos  825: void *
                    826: udp_ctlinput(cmd, sa, v)
1.1       cgd       827:        int cmd;
                    828:        struct sockaddr *sa;
1.27      christos  829:        void *v;
1.1       cgd       830: {
1.66      augustss  831:        struct ip *ip = v;
                    832:        struct udphdr *uh;
1.18      mycroft   833:        void (*notify) __P((struct inpcb *, int)) = udp_notify;
1.21      mycroft   834:        int errno;
1.1       cgd       835:
1.53      itojun    836:        if (sa->sa_family != AF_INET
                    837:         || sa->sa_len != sizeof(struct sockaddr_in))
1.51      itojun    838:                return NULL;
1.20      mycroft   839:        if ((unsigned)cmd >= PRC_NCMDS)
1.27      christos  840:                return NULL;
1.20      mycroft   841:        errno = inetctlerrmap[cmd];
1.18      mycroft   842:        if (PRC_IS_REDIRECT(cmd))
1.19      mycroft   843:                notify = in_rtchange, ip = 0;
1.18      mycroft   844:        else if (cmd == PRC_HOSTDEAD)
1.19      mycroft   845:                ip = 0;
1.23      cgd       846:        else if (errno == 0)
1.27      christos  847:                return NULL;
1.19      mycroft   848:        if (ip) {
1.1       cgd       849:                uh = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2));
1.34      mycroft   850:                in_pcbnotify(&udbtable, satosin(sa)->sin_addr, uh->uh_dport,
                    851:                    ip->ip_src, uh->uh_sport, errno, notify);
1.53      itojun    852:
                    853:                /* XXX mapped address case */
1.19      mycroft   854:        } else
1.34      mycroft   855:                in_pcbnotifyall(&udbtable, satosin(sa)->sin_addr, errno,
                    856:                    notify);
1.27      christos  857:        return NULL;
1.1       cgd       858: }
                    859:
1.7       mycroft   860: int
1.27      christos  861: #if __STDC__
                    862: udp_output(struct mbuf *m, ...)
                    863: #else
                    864: udp_output(m, va_alist)
                    865:        struct mbuf *m;
                    866:        va_dcl
                    867: #endif
                    868: {
1.66      augustss  869:        struct inpcb *inp;
                    870:        struct udpiphdr *ui;
                    871:        int len = m->m_pkthdr.len;
1.31      mycroft   872:        int error = 0;
1.27      christos  873:        va_list ap;
                    874:
                    875:        va_start(ap, m);
                    876:        inp = va_arg(ap, struct inpcb *);
                    877:        va_end(ap);
1.1       cgd       878:
                    879:        /*
                    880:         * Calculate data length and get a mbuf
                    881:         * for UDP and IP headers.
                    882:         */
1.13      mycroft   883:        M_PREPEND(m, sizeof(struct udpiphdr), M_DONTWAIT);
                    884:        if (m == 0) {
                    885:                error = ENOBUFS;
1.39      thorpej   886:                goto release;
                    887:        }
                    888:
                    889:        /*
                    890:         * Compute the packet length of the IP header, and
                    891:         * punt if the length looks bogus.
                    892:         */
                    893:        if ((len + sizeof(struct udpiphdr)) > IP_MAXPACKET) {
                    894:                error = EMSGSIZE;
1.13      mycroft   895:                goto release;
                    896:        }
1.1       cgd       897:
                    898:        /*
                    899:         * Fill in mbuf with extended UDP header
                    900:         * and addresses and length put into network format.
                    901:         */
                    902:        ui = mtod(m, struct udpiphdr *);
                    903:        ui->ui_pr = IPPROTO_UDP;
                    904:        ui->ui_src = inp->inp_laddr;
                    905:        ui->ui_dst = inp->inp_faddr;
                    906:        ui->ui_sport = inp->inp_lport;
                    907:        ui->ui_dport = inp->inp_fport;
1.78      thorpej   908:        ui->ui_ulen = htons((u_int16_t)len + sizeof(struct udphdr));
1.1       cgd       909:
                    910:        /*
1.78      thorpej   911:         * Set up checksum and output datagram.
1.1       cgd       912:         */
                    913:        if (udpcksum) {
1.78      thorpej   914:                /*
                    915:                 * XXX Cache pseudo-header checksum part for
                    916:                 * XXX "connected" UDP sockets.
                    917:                 */
                    918:                ui->ui_sum = in_cksum_phdr(ui->ui_src.s_addr,
                    919:                    ui->ui_dst.s_addr, htons((u_int16_t)len +
                    920:                    sizeof(struct udphdr) + IPPROTO_UDP));
                    921:                m->m_pkthdr.csum_flags = M_CSUM_UDPv4;
                    922:                m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum);
                    923:        } else
                    924:                ui->ui_sum = 0;
1.1       cgd       925:        ((struct ip *)ui)->ip_len = sizeof (struct udpiphdr) + len;
                    926:        ((struct ip *)ui)->ip_ttl = inp->inp_ip.ip_ttl; /* XXX */
                    927:        ((struct ip *)ui)->ip_tos = inp->inp_ip.ip_tos; /* XXX */
                    928:        udpstat.udps_opackets++;
1.48      itojun    929:
                    930: #ifdef IPSEC
1.75      itojun    931:        if (ipsec_setsocket(m, inp->inp_socket) != 0) {
                    932:                error = ENOBUFS;
                    933:                goto release;
                    934:        }
1.48      itojun    935: #endif /*IPSEC*/
                    936:
1.31      mycroft   937:        return (ip_output(m, inp->inp_options, &inp->inp_route,
1.12      mycroft   938:            inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST),
1.31      mycroft   939:            inp->inp_moptions));
1.1       cgd       940:
                    941: release:
                    942:        m_freem(m);
                    943:        return (error);
                    944: }
                    945:
1.42      thorpej   946: int    udp_sendspace = 9216;           /* really max datagram size */
                    947: int    udp_recvspace = 40 * (1024 + sizeof(struct sockaddr_in));
1.1       cgd       948:                                        /* 40 1K datagrams */
                    949:
                    950: /*ARGSUSED*/
1.7       mycroft   951: int
1.31      mycroft   952: udp_usrreq(so, req, m, nam, control, p)
1.1       cgd       953:        struct socket *so;
                    954:        int req;
1.31      mycroft   955:        struct mbuf *m, *nam, *control;
1.30      mycroft   956:        struct proc *p;
1.1       cgd       957: {
1.66      augustss  958:        struct inpcb *inp;
1.1       cgd       959:        int s;
1.66      augustss  960:        int error = 0;
1.1       cgd       961:
                    962:        if (req == PRU_CONTROL)
1.31      mycroft   963:                return (in_control(so, (long)m, (caddr_t)nam,
1.30      mycroft   964:                    (struct ifnet *)control, p));
1.59      thorpej   965:
1.60      thorpej   966:        if (req == PRU_PURGEIF) {
1.80      itojun    967:                in_pcbpurgeif0(&udbtable, (struct ifnet *)control);
1.60      thorpej   968:                in_purgeif((struct ifnet *)control);
                    969:                in_pcbpurgeif(&udbtable, (struct ifnet *)control);
1.59      thorpej   970:                return (0);
                    971:        }
1.31      mycroft   972:
                    973:        s = splsoftnet();
                    974:        inp = sotoinpcb(so);
1.32      mycroft   975: #ifdef DIAGNOSTIC
                    976:        if (req != PRU_SEND && req != PRU_SENDOOB && control)
                    977:                panic("udp_usrreq: unexpected control mbuf");
                    978: #endif
1.31      mycroft   979:        if (inp == 0 && req != PRU_ATTACH) {
                    980:                error = EINVAL;
                    981:                goto release;
                    982:        }
                    983:
1.1       cgd       984:        /*
                    985:         * Note: need to block udp_input while changing
                    986:         * the udp pcb queue and/or pcb addresses.
                    987:         */
                    988:        switch (req) {
                    989:
                    990:        case PRU_ATTACH:
1.31      mycroft   991:                if (inp != 0) {
                    992:                        error = EISCONN;
1.1       cgd       993:                        break;
                    994:                }
1.31      mycroft   995:                if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
                    996:                        error = soreserve(so, udp_sendspace, udp_recvspace);
                    997:                        if (error)
                    998:                                break;
                    999:                }
1.18      mycroft  1000:                error = in_pcballoc(so, &udbtable);
1.1       cgd      1001:                if (error)
                   1002:                        break;
1.31      mycroft  1003:                inp = sotoinpcb(so);
                   1004:                inp->inp_ip.ip_ttl = ip_defttl;
1.1       cgd      1005:                break;
                   1006:
                   1007:        case PRU_DETACH:
1.31      mycroft  1008:                in_pcbdetach(inp);
1.1       cgd      1009:                break;
                   1010:
                   1011:        case PRU_BIND:
1.31      mycroft  1012:                error = in_pcbbind(inp, nam, p);
1.1       cgd      1013:                break;
                   1014:
                   1015:        case PRU_LISTEN:
                   1016:                error = EOPNOTSUPP;
                   1017:                break;
                   1018:
                   1019:        case PRU_CONNECT:
1.31      mycroft  1020:                error = in_pcbconnect(inp, nam);
                   1021:                if (error)
1.1       cgd      1022:                        break;
1.31      mycroft  1023:                soisconnected(so);
1.1       cgd      1024:                break;
                   1025:
                   1026:        case PRU_CONNECT2:
                   1027:                error = EOPNOTSUPP;
                   1028:                break;
                   1029:
                   1030:        case PRU_DISCONNECT:
1.31      mycroft  1031:                /*soisdisconnected(so);*/
                   1032:                so->so_state &= ~SS_ISCONNECTED;        /* XXX */
1.1       cgd      1033:                in_pcbdisconnect(inp);
1.34      mycroft  1034:                inp->inp_laddr = zeroin_addr;           /* XXX */
1.35      mycroft  1035:                in_pcbstate(inp, INP_BOUND);            /* XXX */
1.1       cgd      1036:                break;
                   1037:
                   1038:        case PRU_SHUTDOWN:
                   1039:                socantsendmore(so);
                   1040:                break;
                   1041:
1.31      mycroft  1042:        case PRU_RCVD:
                   1043:                error = EOPNOTSUPP;
1.1       cgd      1044:                break;
                   1045:
1.31      mycroft  1046:        case PRU_SEND:
1.32      mycroft  1047:                if (control && control->m_len) {
                   1048:                        m_freem(control);
                   1049:                        m_freem(m);
                   1050:                        error = EINVAL;
                   1051:                        break;
                   1052:                }
1.31      mycroft  1053:        {
1.35      mycroft  1054:                struct in_addr laddr;                   /* XXX */
1.1       cgd      1055:
1.31      mycroft  1056:                if (nam) {
1.35      mycroft  1057:                        laddr = inp->inp_laddr;         /* XXX */
1.31      mycroft  1058:                        if ((so->so_state & SS_ISCONNECTED) != 0) {
                   1059:                                error = EISCONN;
1.32      mycroft  1060:                                goto die;
1.31      mycroft  1061:                        }
                   1062:                        error = in_pcbconnect(inp, nam);
1.32      mycroft  1063:                        if (error) {
                   1064:                        die:
                   1065:                                m_freem(m);
1.31      mycroft  1066:                                break;
1.32      mycroft  1067:                        }
1.31      mycroft  1068:                } else {
                   1069:                        if ((so->so_state & SS_ISCONNECTED) == 0) {
                   1070:                                error = ENOTCONN;
1.32      mycroft  1071:                                goto die;
1.31      mycroft  1072:                        }
                   1073:                }
1.33      mycroft  1074:                error = udp_output(m, inp);
1.31      mycroft  1075:                if (nam) {
                   1076:                        in_pcbdisconnect(inp);
1.35      mycroft  1077:                        inp->inp_laddr = laddr;         /* XXX */
                   1078:                        in_pcbstate(inp, INP_BOUND);    /* XXX */
1.31      mycroft  1079:                }
                   1080:        }
1.1       cgd      1081:                break;
                   1082:
                   1083:        case PRU_SENSE:
                   1084:                /*
                   1085:                 * stat: don't bother with a blocksize.
                   1086:                 */
1.31      mycroft  1087:                splx(s);
1.1       cgd      1088:                return (0);
                   1089:
1.31      mycroft  1090:        case PRU_RCVOOB:
                   1091:                error =  EOPNOTSUPP;
                   1092:                break;
                   1093:
1.1       cgd      1094:        case PRU_SENDOOB:
1.32      mycroft  1095:                m_freem(control);
1.31      mycroft  1096:                m_freem(m);
1.1       cgd      1097:                error =  EOPNOTSUPP;
                   1098:                break;
                   1099:
1.31      mycroft  1100:        case PRU_SOCKADDR:
                   1101:                in_setsockaddr(inp, nam);
                   1102:                break;
                   1103:
                   1104:        case PRU_PEERADDR:
                   1105:                in_setpeeraddr(inp, nam);
                   1106:                break;
1.1       cgd      1107:
                   1108:        default:
                   1109:                panic("udp_usrreq");
                   1110:        }
                   1111:
                   1112: release:
1.31      mycroft  1113:        splx(s);
1.1       cgd      1114:        return (error);
1.13      mycroft  1115: }
                   1116:
                   1117: /*
                   1118:  * Sysctl for udp variables.
                   1119:  */
1.27      christos 1120: int
1.13      mycroft  1121: udp_sysctl(name, namelen, oldp, oldlenp, newp, newlen)
                   1122:        int *name;
                   1123:        u_int namelen;
                   1124:        void *oldp;
                   1125:        size_t *oldlenp;
                   1126:        void *newp;
                   1127:        size_t newlen;
                   1128: {
                   1129:        /* All sysctl names at this level are terminal. */
                   1130:        if (namelen != 1)
                   1131:                return (ENOTDIR);
                   1132:
                   1133:        switch (name[0]) {
                   1134:        case UDPCTL_CHECKSUM:
                   1135:                return (sysctl_int(oldp, oldlenp, newp, newlen, &udpcksum));
1.42      thorpej  1136:        case UDPCTL_SENDSPACE:
                   1137:                return (sysctl_int(oldp, oldlenp, newp, newlen,
                   1138:                    &udp_sendspace));
                   1139:        case UDPCTL_RECVSPACE:
                   1140:                return (sysctl_int(oldp, oldlenp, newp, newlen,
                   1141:                    &udp_recvspace));
1.13      mycroft  1142:        default:
                   1143:                return (ENOPROTOOPT);
                   1144:        }
                   1145:        /* NOTREACHED */
1.1       cgd      1146: }
1.72      itojun   1147: #endif

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