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Annotation of src/sys/netinet/udp_usrreq.c, Revision 1.100

1.100   ! matt        1: /*     $NetBSD: udp_usrreq.c,v 1.99 2003/05/14 06:47:37 itojun Exp $   */
1.48      itojun      2:
                      3: /*
                      4:  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
                      5:  * All rights reserved.
1.94      itojun      6:  *
1.48      itojun      7:  * Redistribution and use in source and binary forms, with or without
                      8:  * modification, are permitted provided that the following conditions
                      9:  * are met:
                     10:  * 1. Redistributions of source code must retain the above copyright
                     11:  *    notice, this list of conditions and the following disclaimer.
                     12:  * 2. Redistributions in binary form must reproduce the above copyright
                     13:  *    notice, this list of conditions and the following disclaimer in the
                     14:  *    documentation and/or other materials provided with the distribution.
                     15:  * 3. Neither the name of the project nor the names of its contributors
                     16:  *    may be used to endorse or promote products derived from this software
                     17:  *    without specific prior written permission.
1.94      itojun     18:  *
1.48      itojun     19:  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
                     20:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     21:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     22:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
                     23:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     24:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     25:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     26:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     27:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     28:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     29:  * SUCH DAMAGE.
                     30:  */
1.14      cgd        31:
1.1       cgd        32: /*
1.44      thorpej    33:  * Copyright (c) 1982, 1986, 1988, 1990, 1993, 1995
1.13      mycroft    34:  *     The Regents of the University of California.  All rights reserved.
1.1       cgd        35:  *
                     36:  * Redistribution and use in source and binary forms, with or without
                     37:  * modification, are permitted provided that the following conditions
                     38:  * are met:
                     39:  * 1. Redistributions of source code must retain the above copyright
                     40:  *    notice, this list of conditions and the following disclaimer.
                     41:  * 2. Redistributions in binary form must reproduce the above copyright
                     42:  *    notice, this list of conditions and the following disclaimer in the
                     43:  *    documentation and/or other materials provided with the distribution.
                     44:  * 3. All advertising materials mentioning features or use of this software
                     45:  *    must display the following acknowledgement:
                     46:  *     This product includes software developed by the University of
                     47:  *     California, Berkeley and its contributors.
                     48:  * 4. Neither the name of the University nor the names of its contributors
                     49:  *    may be used to endorse or promote products derived from this software
                     50:  *    without specific prior written permission.
                     51:  *
                     52:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     53:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     54:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     55:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     56:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     57:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     58:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     59:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     60:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     61:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     62:  * SUCH DAMAGE.
                     63:  *
1.44      thorpej    64:  *     @(#)udp_usrreq.c        8.6 (Berkeley) 5/23/95
1.1       cgd        65:  */
1.91      lukem      66:
                     67: #include <sys/cdefs.h>
1.100   ! matt       68: __KERNEL_RCSID(0, "$NetBSD: udp_usrreq.c,v 1.99 2003/05/14 06:47:37 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: #ifndef INET6
                    110: /* always need ip6.h for IP6_EXTHDR_GET */
                    111: #include <netinet/ip6.h>
                    112: #endif
                    113:
1.76      itojun    114: #include "faith.h"
                    115: #if defined(NFAITH) && NFAITH > 0
                    116: #include <net/if_faith.h>
                    117: #endif
                    118:
1.27      christos  119: #include <machine/stdarg.h>
                    120:
1.48      itojun    121: #ifdef IPSEC
                    122: #include <netinet6/ipsec.h>
                    123: #include <netkey/key.h>
                    124: #endif /*IPSEC*/
                    125:
1.64      ws        126: #ifdef IPKDB
                    127: #include <ipkdb/ipkdb.h>
                    128: #endif
                    129:
1.8       mycroft   130: /*
                    131:  * UDP protocol implementation.
                    132:  * Per RFC 768, August, 1980.
                    133:  */
                    134: #ifndef        COMPAT_42
                    135: int    udpcksum = 1;
                    136: #else
                    137: int    udpcksum = 0;           /* XXX */
                    138: #endif
1.93      matt      139:
                    140: struct inpcbtable udbtable;
                    141: struct udpstat udpstat;
1.8       mycroft   142:
1.72      itojun    143: #ifdef INET
1.53      itojun    144: static void udp4_sendup __P((struct mbuf *, int, struct sockaddr *,
                    145:        struct socket *));
                    146: static int udp4_realinput __P((struct sockaddr_in *, struct sockaddr_in *,
                    147:        struct mbuf *, int));
1.72      itojun    148: #endif
1.53      itojun    149: #ifdef INET6
                    150: static void udp6_sendup __P((struct mbuf *, int, struct sockaddr *,
                    151:        struct socket *));
                    152: static int udp6_realinput __P((int, struct sockaddr_in6 *,
                    153:        struct sockaddr_in6 *, struct mbuf *, int));
                    154: #endif
1.72      itojun    155: #ifdef INET
1.13      mycroft   156: static void udp_notify __P((struct inpcb *, int));
1.72      itojun    157: #endif
1.7       mycroft   158:
1.26      mycroft   159: #ifndef UDBHASHSIZE
                    160: #define        UDBHASHSIZE     128
                    161: #endif
                    162: int    udbhashsize = UDBHASHSIZE;
                    163:
1.98      matt      164: #ifdef MBUFTRACE
                    165: struct mowner udp_mowner = { "udp" };
                    166: struct mowner udp_rx_mowner = { "udp", "rx" };
                    167: struct mowner udp_tx_mowner = { "udp", "tx" };
                    168: #endif
                    169:
1.78      thorpej   170: #ifdef UDP_CSUM_COUNTERS
                    171: #include <sys/device.h>
                    172:
                    173: struct evcnt udp_hwcsum_bad = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
                    174:     NULL, "udp", "hwcsum bad");
                    175: struct evcnt udp_hwcsum_ok = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
                    176:     NULL, "udp", "hwcsum ok");
                    177: struct evcnt udp_hwcsum_data = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
                    178:     NULL, "udp", "hwcsum data");
                    179: struct evcnt udp_swcsum = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
                    180:     NULL, "udp", "swcsum");
                    181:
                    182: #define        UDP_CSUM_COUNTER_INCR(ev)       (ev)->ev_count++
                    183:
                    184: #else
                    185:
                    186: #define        UDP_CSUM_COUNTER_INCR(ev)       /* nothing */
                    187:
                    188: #endif /* UDP_CSUM_COUNTERS */
                    189:
1.7       mycroft   190: void
1.1       cgd       191: udp_init()
                    192: {
1.18      mycroft   193:
1.72      itojun    194: #ifdef INET
1.35      mycroft   195:        in_pcbinit(&udbtable, udbhashsize, udbhashsize);
1.72      itojun    196: #endif
1.78      thorpej   197:
                    198: #ifdef UDP_CSUM_COUNTERS
                    199:        evcnt_attach_static(&udp_hwcsum_bad);
                    200:        evcnt_attach_static(&udp_hwcsum_ok);
                    201:        evcnt_attach_static(&udp_hwcsum_data);
                    202:        evcnt_attach_static(&udp_swcsum);
                    203: #endif /* UDP_CSUM_COUNTERS */
1.98      matt      204:
                    205:        MOWNER_ATTACH(&udp_tx_mowner);
                    206:        MOWNER_ATTACH(&udp_rx_mowner);
                    207:        MOWNER_ATTACH(&udp_mowner);
1.1       cgd       208: }
                    209:
1.72      itojun    210: #ifdef INET
1.7       mycroft   211: void
1.27      christos  212: #if __STDC__
                    213: udp_input(struct mbuf *m, ...)
                    214: #else
                    215: udp_input(m, va_alist)
                    216:        struct mbuf *m;
                    217:        va_dcl
                    218: #endif
1.1       cgd       219: {
1.53      itojun    220:        va_list ap;
                    221:        struct sockaddr_in src, dst;
                    222:        struct ip *ip;
                    223:        struct udphdr *uh;
1.97      simonb    224:        int iphlen;
1.53      itojun    225:        int len;
                    226:        int n;
1.96      itojun    227:        u_int16_t ip_len;
1.53      itojun    228:
                    229:        va_start(ap, m);
                    230:        iphlen = va_arg(ap, int);
1.97      simonb    231:        (void)va_arg(ap, int);          /* ignore value, advance ap */
1.53      itojun    232:        va_end(ap);
                    233:
1.98      matt      234:        MCLAIM(m, &udp_rx_mowner);
1.53      itojun    235:        udpstat.udps_ipackets++;
                    236:
                    237:        /*
                    238:         * Get IP and UDP header together in first mbuf.
                    239:         */
                    240:        ip = mtod(m, struct ip *);
                    241:        IP6_EXTHDR_GET(uh, struct udphdr *, m, iphlen, sizeof(struct udphdr));
                    242:        if (uh == NULL) {
                    243:                udpstat.udps_hdrops++;
                    244:                return;
                    245:        }
1.95      thorpej   246:        KASSERT(UDP_HDR_ALIGNED_P(uh));
1.53      itojun    247:
1.57      itojun    248:        /* destination port of 0 is illegal, based on RFC768. */
                    249:        if (uh->uh_dport == 0)
                    250:                goto bad;
                    251:
1.53      itojun    252:        /*
                    253:         * Make mbuf data length reflect UDP length.
                    254:         * If not enough data to reflect UDP length, drop.
                    255:         */
1.96      itojun    256:        ip_len = ntohs(ip->ip_len);
1.53      itojun    257:        len = ntohs((u_int16_t)uh->uh_ulen);
1.96      itojun    258:        if (ip_len != iphlen + len) {
                    259:                if (ip_len < iphlen + len || len < sizeof(struct udphdr)) {
1.53      itojun    260:                        udpstat.udps_badlen++;
                    261:                        goto bad;
                    262:                }
1.96      itojun    263:                m_adj(m, iphlen + len - ip_len);
1.53      itojun    264:        }
                    265:
                    266:        /*
                    267:         * Checksum extended UDP header and data.
                    268:         */
                    269:        if (uh->uh_sum) {
1.78      thorpej   270:                switch (m->m_pkthdr.csum_flags &
1.84      thorpej   271:                        ((m->m_pkthdr.rcvif->if_csum_flags_rx & M_CSUM_UDPv4) |
1.78      thorpej   272:                         M_CSUM_TCP_UDP_BAD | M_CSUM_DATA)) {
                    273:                case M_CSUM_UDPv4|M_CSUM_TCP_UDP_BAD:
                    274:                        UDP_CSUM_COUNTER_INCR(&udp_hwcsum_bad);
                    275:                        goto badcsum;
                    276:
                    277:                case M_CSUM_UDPv4|M_CSUM_DATA:
                    278:                        UDP_CSUM_COUNTER_INCR(&udp_hwcsum_data);
                    279:                        if ((m->m_pkthdr.csum_data ^ 0xffff) != 0)
                    280:                                goto badcsum;
                    281:                        break;
                    282:
                    283:                case M_CSUM_UDPv4:
                    284:                        /* Checksum was okay. */
                    285:                        UDP_CSUM_COUNTER_INCR(&udp_hwcsum_ok);
                    286:                        break;
                    287:
                    288:                default:
                    289:                        /* Need to compute it ourselves. */
                    290:                        UDP_CSUM_COUNTER_INCR(&udp_swcsum);
                    291:                        if (in4_cksum(m, IPPROTO_UDP, iphlen, len) != 0)
                    292:                                goto badcsum;
                    293:                        break;
1.53      itojun    294:                }
                    295:        }
                    296:
                    297:        /* construct source and dst sockaddrs. */
                    298:        bzero(&src, sizeof(src));
                    299:        src.sin_family = AF_INET;
                    300:        src.sin_len = sizeof(struct sockaddr_in);
                    301:        bcopy(&ip->ip_src, &src.sin_addr, sizeof(src.sin_addr));
                    302:        src.sin_port = uh->uh_sport;
                    303:        bzero(&dst, sizeof(dst));
                    304:        dst.sin_family = AF_INET;
                    305:        dst.sin_len = sizeof(struct sockaddr_in);
                    306:        bcopy(&ip->ip_dst, &dst.sin_addr, sizeof(dst.sin_addr));
                    307:        dst.sin_port = uh->uh_dport;
                    308:
                    309:        n = udp4_realinput(&src, &dst, m, iphlen);
                    310: #ifdef INET6
                    311:        if (IN_MULTICAST(ip->ip_dst.s_addr) || n == 0) {
                    312:                struct sockaddr_in6 src6, dst6;
                    313:
                    314:                bzero(&src6, sizeof(src6));
                    315:                src6.sin6_family = AF_INET6;
                    316:                src6.sin6_len = sizeof(struct sockaddr_in6);
                    317:                src6.sin6_addr.s6_addr[10] = src6.sin6_addr.s6_addr[11] = 0xff;
                    318:                bcopy(&ip->ip_src, &src6.sin6_addr.s6_addr[12],
                    319:                        sizeof(ip->ip_src));
                    320:                src6.sin6_port = uh->uh_sport;
                    321:                bzero(&dst6, sizeof(dst6));
                    322:                dst6.sin6_family = AF_INET6;
                    323:                dst6.sin6_len = sizeof(struct sockaddr_in6);
                    324:                dst6.sin6_addr.s6_addr[10] = dst6.sin6_addr.s6_addr[11] = 0xff;
                    325:                bcopy(&ip->ip_dst, &dst6.sin6_addr.s6_addr[12],
                    326:                        sizeof(ip->ip_dst));
                    327:                dst6.sin6_port = uh->uh_dport;
                    328:
                    329:                n += udp6_realinput(AF_INET, &src6, &dst6, m, iphlen);
                    330:        }
                    331: #endif
                    332:
                    333:        if (n == 0) {
                    334:                if (m->m_flags & (M_BCAST | M_MCAST)) {
                    335:                        udpstat.udps_noportbcast++;
                    336:                        goto bad;
                    337:                }
1.61      itojun    338:                udpstat.udps_noport++;
1.64      ws        339: #ifdef IPKDB
1.53      itojun    340:                if (checkipkdb(&ip->ip_src, uh->uh_sport, uh->uh_dport,
                    341:                                m, iphlen + sizeof(struct udphdr),
                    342:                                m->m_pkthdr.len - iphlen - sizeof(struct udphdr))) {
                    343:                        /*
                    344:                         * It was a debugger connect packet,
                    345:                         * just drop it now
                    346:                         */
                    347:                        goto bad;
                    348:                }
                    349: #endif
                    350:                icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0);
                    351:                m = NULL;
                    352:        }
                    353:
                    354: bad:
                    355:        if (m)
                    356:                m_freem(m);
1.78      thorpej   357:        return;
                    358:
                    359: badcsum:
                    360:        m_freem(m);
                    361:        udpstat.udps_badsum++;
1.53      itojun    362: }
1.72      itojun    363: #endif
1.53      itojun    364:
                    365: #ifdef INET6
                    366: int
                    367: udp6_input(mp, offp, proto)
                    368:        struct mbuf **mp;
                    369:        int *offp, proto;
                    370: {
                    371:        struct mbuf *m = *mp;
                    372:        int off = *offp;
                    373:        struct sockaddr_in6 src, dst;
                    374:        struct ip6_hdr *ip6;
                    375:        struct udphdr *uh;
                    376:        u_int32_t plen, ulen;
                    377:
1.76      itojun    378:        ip6 = mtod(m, struct ip6_hdr *);
                    379:
1.53      itojun    380: #if defined(NFAITH) && 0 < NFAITH
1.76      itojun    381:        if (faithprefix(&ip6->ip6_dst)) {
                    382:                /* send icmp6 host unreach? */
                    383:                m_freem(m);
                    384:                return IPPROTO_DONE;
1.53      itojun    385:        }
                    386: #endif
                    387:
                    388:        udp6stat.udp6s_ipackets++;
                    389:
                    390:        /* check for jumbogram is done in ip6_input.  we can trust pkthdr.len */
                    391:        plen = m->m_pkthdr.len - off;
                    392:        IP6_EXTHDR_GET(uh, struct udphdr *, m, off, sizeof(struct udphdr));
                    393:        if (uh == NULL) {
                    394:                ip6stat.ip6s_tooshort++;
                    395:                return IPPROTO_DONE;
                    396:        }
1.95      thorpej   397:        KASSERT(UDP_HDR_ALIGNED_P(uh));
1.53      itojun    398:        ulen = ntohs((u_short)uh->uh_ulen);
1.69      itojun    399:        /*
                    400:         * RFC2675 section 4: jumbograms will have 0 in the UDP header field,
                    401:         * iff payload length > 0xffff.
                    402:         */
1.53      itojun    403:        if (ulen == 0 && plen > 0xffff)
                    404:                ulen = plen;
                    405:
                    406:        if (plen != ulen) {
                    407:                udp6stat.udp6s_badlen++;
1.54      itojun    408:                goto bad;
                    409:        }
                    410:
1.57      itojun    411:        /* destination port of 0 is illegal, based on RFC768. */
                    412:        if (uh->uh_dport == 0)
                    413:                goto bad;
                    414:
1.54      itojun    415:        /* Be proactive about malicious use of IPv4 mapped address */
                    416:        if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
                    417:            IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
                    418:                /* XXX stat */
1.53      itojun    419:                goto bad;
                    420:        }
                    421:
                    422:        /*
                    423:         * Checksum extended UDP header and data.
                    424:         */
                    425:        if (uh->uh_sum == 0)
                    426:                udp6stat.udp6s_nosum++;
                    427:        else if (in6_cksum(m, IPPROTO_UDP, off, ulen) != 0) {
                    428:                udp6stat.udp6s_badsum++;
                    429:                goto bad;
                    430:        }
                    431:
                    432:        /*
                    433:         * Construct source and dst sockaddrs.
                    434:         * Note that ifindex (s6_addr16[1]) is already filled.
                    435:         */
                    436:        bzero(&src, sizeof(src));
                    437:        src.sin6_family = AF_INET6;
                    438:        src.sin6_len = sizeof(struct sockaddr_in6);
1.69      itojun    439:        /* KAME hack: recover scopeid */
                    440:        (void)in6_recoverscope(&src, &ip6->ip6_src, m->m_pkthdr.rcvif);
1.53      itojun    441:        src.sin6_port = uh->uh_sport;
                    442:        bzero(&dst, sizeof(dst));
                    443:        dst.sin6_family = AF_INET6;
                    444:        dst.sin6_len = sizeof(struct sockaddr_in6);
1.69      itojun    445:        /* KAME hack: recover scopeid */
                    446:        (void)in6_recoverscope(&dst, &ip6->ip6_dst, m->m_pkthdr.rcvif);
1.53      itojun    447:        dst.sin6_port = uh->uh_dport;
                    448:
                    449:        if (udp6_realinput(AF_INET6, &src, &dst, m, off) == 0) {
                    450:                if (m->m_flags & M_MCAST) {
                    451:                        udp6stat.udp6s_noportmcast++;
                    452:                        goto bad;
                    453:                }
1.61      itojun    454:                udp6stat.udp6s_noport++;
1.53      itojun    455:                icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0);
                    456:                m = NULL;
                    457:        }
                    458:
                    459: bad:
                    460:        if (m)
                    461:                m_freem(m);
                    462:        return IPPROTO_DONE;
                    463: }
                    464: #endif
                    465:
1.72      itojun    466: #ifdef INET
1.53      itojun    467: static void
                    468: udp4_sendup(m, off, src, so)
                    469:        struct mbuf *m;
                    470:        int off;        /* offset of data portion */
                    471:        struct sockaddr *src;
                    472:        struct socket *so;
                    473: {
                    474:        struct mbuf *opts = NULL;
                    475:        struct mbuf *n;
                    476:        struct inpcb *inp = NULL;
                    477:
                    478:        if (!so)
                    479:                return;
                    480:        switch (so->so_proto->pr_domain->dom_family) {
                    481:        case AF_INET:
                    482:                inp = sotoinpcb(so);
                    483:                break;
                    484: #ifdef INET6
                    485:        case AF_INET6:
                    486:                break;
                    487: #endif
                    488:        default:
                    489:                return;
                    490:        }
                    491:
                    492: #ifdef IPSEC
                    493:        /* check AH/ESP integrity. */
                    494:        if (so != NULL && ipsec4_in_reject_so(m, so)) {
                    495:                ipsecstat.in_polvio++;
                    496:                return;
                    497:        }
                    498: #endif /*IPSEC*/
                    499:
                    500:        if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
                    501:                if (inp && (inp->inp_flags & INP_CONTROLOPTS
                    502:                         || so->so_options & SO_TIMESTAMP)) {
                    503:                        struct ip *ip = mtod(n, struct ip *);
                    504:                        ip_savecontrol(inp, &opts, ip, n);
                    505:                }
                    506:
                    507:                m_adj(n, off);
                    508:                if (sbappendaddr(&so->so_rcv, src, n,
                    509:                                opts) == 0) {
                    510:                        m_freem(n);
                    511:                        if (opts)
                    512:                                m_freem(opts);
1.81      enami     513:                        udpstat.udps_fullsock++;
1.53      itojun    514:                } else
                    515:                        sorwakeup(so);
                    516:        }
                    517: }
1.72      itojun    518: #endif
1.53      itojun    519:
                    520: #ifdef INET6
                    521: static void
                    522: udp6_sendup(m, off, src, so)
                    523:        struct mbuf *m;
                    524:        int off;        /* offset of data portion */
                    525:        struct sockaddr *src;
                    526:        struct socket *so;
                    527: {
                    528:        struct mbuf *opts = NULL;
                    529:        struct mbuf *n;
                    530:        struct in6pcb *in6p = NULL;
                    531:
                    532:        if (!so)
                    533:                return;
                    534:        if (so->so_proto->pr_domain->dom_family != AF_INET6)
                    535:                return;
                    536:        in6p = sotoin6pcb(so);
                    537:
                    538: #ifdef IPSEC
                    539:        /* check AH/ESP integrity. */
                    540:        if (so != NULL && ipsec6_in_reject_so(m, so)) {
                    541:                ipsec6stat.in_polvio++;
                    542:                return;
                    543:        }
                    544: #endif /*IPSEC*/
                    545:
                    546:        if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
                    547:                if (in6p && (in6p->in6p_flags & IN6P_CONTROLOPTS
                    548:                          || in6p->in6p_socket->so_options & SO_TIMESTAMP)) {
                    549:                        struct ip6_hdr *ip6 = mtod(n, struct ip6_hdr *);
                    550:                        ip6_savecontrol(in6p, &opts, ip6, n);
                    551:                }
                    552:
                    553:                m_adj(n, off);
                    554:                if (sbappendaddr(&so->so_rcv, src, n, opts) == 0) {
                    555:                        m_freem(n);
                    556:                        if (opts)
                    557:                                m_freem(opts);
                    558:                        udp6stat.udp6s_fullsock++;
                    559:                } else
                    560:                        sorwakeup(so);
                    561:        }
                    562: }
                    563: #endif
                    564:
1.72      itojun    565: #ifdef INET
1.53      itojun    566: static int
                    567: udp4_realinput(src, dst, m, off)
                    568:        struct sockaddr_in *src;
                    569:        struct sockaddr_in *dst;
                    570:        struct mbuf *m;
                    571:        int off;        /* offset of udphdr */
                    572: {
                    573:        u_int16_t *sport, *dport;
                    574:        int rcvcnt;
                    575:        struct in_addr *src4, *dst4;
                    576:        struct inpcb *inp;
                    577:
                    578:        rcvcnt = 0;
                    579:        off += sizeof(struct udphdr);   /* now, offset of payload */
                    580:
                    581:        if (src->sin_family != AF_INET || dst->sin_family != AF_INET)
                    582:                goto bad;
                    583:
                    584:        src4 = &src->sin_addr;
                    585:        sport = &src->sin_port;
                    586:        dst4 = &dst->sin_addr;
                    587:        dport = &dst->sin_port;
                    588:
1.73      itojun    589:        if (IN_MULTICAST(dst4->s_addr) ||
1.53      itojun    590:            in_broadcast(*dst4, m->m_pkthdr.rcvif)) {
                    591:                /*
                    592:                 * Deliver a multicast or broadcast datagram to *all* sockets
                    593:                 * for which the local and remote addresses and ports match
                    594:                 * those of the incoming datagram.  This allows more than
                    595:                 * one process to receive multi/broadcasts on the same port.
                    596:                 * (This really ought to be done for unicast datagrams as
                    597:                 * well, but that would cause problems with existing
                    598:                 * applications that open both address-specific sockets and
                    599:                 * a wildcard socket listening to the same port -- they would
                    600:                 * end up receiving duplicates of every unicast datagram.
                    601:                 * Those applications open the multiple sockets to overcome an
                    602:                 * inadequacy of the UDP socket interface, but for backwards
                    603:                 * compatibility we avoid the problem here rather than
                    604:                 * fixing the interface.  Maybe 4.5BSD will remedy this?)
                    605:                 */
                    606:
                    607:                /*
1.92      itojun    608:                 * KAME note: traditionally we dropped udpiphdr from mbuf here.
1.71      itojun    609:                 * we need udpiphdr for IPsec processing so we do that later.
1.53      itojun    610:                 */
                    611:                /*
                    612:                 * Locate pcb(s) for datagram.
                    613:                 */
1.89      matt      614:                CIRCLEQ_FOREACH(inp, &udbtable.inpt_queue, inp_queue) {
1.53      itojun    615:                        if (inp->inp_lport != *dport)
                    616:                                continue;
                    617:                        if (!in_nullhost(inp->inp_laddr)) {
                    618:                                if (!in_hosteq(inp->inp_laddr, *dst4))
                    619:                                        continue;
                    620:                        }
                    621:                        if (!in_nullhost(inp->inp_faddr)) {
                    622:                                if (!in_hosteq(inp->inp_faddr, *src4) ||
                    623:                                    inp->inp_fport != *sport)
                    624:                                        continue;
                    625:                        }
                    626:
                    627:                        udp4_sendup(m, off, (struct sockaddr *)src,
                    628:                                inp->inp_socket);
                    629:                        rcvcnt++;
                    630:
                    631:                        /*
                    632:                         * Don't look for additional matches if this one does
                    633:                         * not have either the SO_REUSEPORT or SO_REUSEADDR
                    634:                         * socket options set.  This heuristic avoids searching
                    635:                         * through all pcbs in the common case of a non-shared
                    636:                         * port.  It assumes that an application will never
                    637:                         * clear these options after setting them.
                    638:                         */
                    639:                        if ((inp->inp_socket->so_options &
                    640:                            (SO_REUSEPORT|SO_REUSEADDR)) == 0)
                    641:                                break;
                    642:                }
                    643:        } else {
                    644:                /*
                    645:                 * Locate pcb for datagram.
                    646:                 */
                    647:                inp = in_pcblookup_connect(&udbtable, *src4, *sport, *dst4, *dport);
                    648:                if (inp == 0) {
                    649:                        ++udpstat.udps_pcbhashmiss;
                    650:                        inp = in_pcblookup_bind(&udbtable, *dst4, *dport);
1.82      itojun    651:                        if (inp == 0)
1.53      itojun    652:                                return rcvcnt;
                    653:                }
                    654:
                    655:                udp4_sendup(m, off, (struct sockaddr *)src, inp->inp_socket);
                    656:                rcvcnt++;
                    657:        }
                    658:
                    659: bad:
                    660:        return rcvcnt;
                    661: }
1.72      itojun    662: #endif
1.53      itojun    663:
                    664: #ifdef INET6
                    665: static int
                    666: udp6_realinput(af, src, dst, m, off)
                    667:        int af;         /* af on packet */
                    668:        struct sockaddr_in6 *src;
                    669:        struct sockaddr_in6 *dst;
                    670:        struct mbuf *m;
                    671:        int off;        /* offset of udphdr */
                    672: {
1.79      itojun    673:        u_int16_t sport, dport;
1.53      itojun    674:        int rcvcnt;
1.79      itojun    675:        struct in6_addr src6, dst6;
                    676:        const struct in_addr *dst4;
1.53      itojun    677:        struct in6pcb *in6p;
                    678:
                    679:        rcvcnt = 0;
                    680:        off += sizeof(struct udphdr);   /* now, offset of payload */
                    681:
                    682:        if (af != AF_INET && af != AF_INET6)
                    683:                goto bad;
                    684:        if (src->sin6_family != AF_INET6 || dst->sin6_family != AF_INET6)
                    685:                goto bad;
                    686:
1.79      itojun    687:        in6_embedscope(&src6, src, NULL, NULL);
                    688:        sport = src->sin6_port;
                    689:        in6_embedscope(&dst6, dst, NULL, NULL);
                    690:        dport = dst->sin6_port;
1.88      itojun    691:        dst4 = (struct in_addr *)&dst->sin6_addr.s6_addr[12];
1.53      itojun    692:
1.79      itojun    693:        if (IN6_IS_ADDR_MULTICAST(&dst6) ||
                    694:            (af == AF_INET && IN_MULTICAST(dst4->s_addr))) {
1.53      itojun    695:                /*
                    696:                 * Deliver a multicast or broadcast datagram to *all* sockets
                    697:                 * for which the local and remote addresses and ports match
                    698:                 * those of the incoming datagram.  This allows more than
                    699:                 * one process to receive multi/broadcasts on the same port.
                    700:                 * (This really ought to be done for unicast datagrams as
                    701:                 * well, but that would cause problems with existing
                    702:                 * applications that open both address-specific sockets and
                    703:                 * a wildcard socket listening to the same port -- they would
                    704:                 * end up receiving duplicates of every unicast datagram.
                    705:                 * Those applications open the multiple sockets to overcome an
                    706:                 * inadequacy of the UDP socket interface, but for backwards
                    707:                 * compatibility we avoid the problem here rather than
                    708:                 * fixing the interface.  Maybe 4.5BSD will remedy this?)
                    709:                 */
                    710:
                    711:                /*
1.92      itojun    712:                 * KAME note: traditionally we dropped udpiphdr from mbuf here.
1.71      itojun    713:                 * we need udpiphdr for IPsec processing so we do that later.
1.53      itojun    714:                 */
                    715:                /*
                    716:                 * Locate pcb(s) for datagram.
                    717:                 */
                    718:                for (in6p = udb6.in6p_next; in6p != &udb6;
                    719:                     in6p = in6p->in6p_next) {
1.79      itojun    720:                        if (in6p->in6p_lport != dport)
1.53      itojun    721:                                continue;
                    722:                        if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) {
1.90      itojun    723:                                if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &dst6))
1.53      itojun    724:                                        continue;
1.92      itojun    725:                        } else {
1.79      itojun    726:                                if (IN6_IS_ADDR_V4MAPPED(&dst6) &&
1.85      itojun    727:                                    (in6p->in6p_flags & IN6P_IPV6_V6ONLY))
1.55      itojun    728:                                        continue;
                    729:                        }
1.53      itojun    730:                        if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
1.79      itojun    731:                                if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr,
                    732:                                    &src6) || in6p->in6p_fport != sport)
1.53      itojun    733:                                        continue;
1.92      itojun    734:                        } else {
1.79      itojun    735:                                if (IN6_IS_ADDR_V4MAPPED(&src6) &&
1.85      itojun    736:                                    (in6p->in6p_flags & IN6P_IPV6_V6ONLY))
1.55      itojun    737:                                        continue;
                    738:                        }
1.53      itojun    739:
                    740:                        udp6_sendup(m, off, (struct sockaddr *)src,
                    741:                                in6p->in6p_socket);
                    742:                        rcvcnt++;
                    743:
                    744:                        /*
                    745:                         * Don't look for additional matches if this one does
                    746:                         * not have either the SO_REUSEPORT or SO_REUSEADDR
                    747:                         * socket options set.  This heuristic avoids searching
                    748:                         * through all pcbs in the common case of a non-shared
                    749:                         * port.  It assumes that an application will never
                    750:                         * clear these options after setting them.
                    751:                         */
                    752:                        if ((in6p->in6p_socket->so_options &
                    753:                            (SO_REUSEPORT|SO_REUSEADDR)) == 0)
                    754:                                break;
                    755:                }
                    756:        } else {
                    757:                /*
                    758:                 * Locate pcb for datagram.
                    759:                 */
1.79      itojun    760:                in6p = in6_pcblookup_connect(&udb6, &src6, sport,
                    761:                    &dst6, dport, 0);
1.53      itojun    762:                if (in6p == 0) {
                    763:                        ++udpstat.udps_pcbhashmiss;
1.79      itojun    764:                        in6p = in6_pcblookup_bind(&udb6, &dst6, dport, 0);
1.82      itojun    765:                        if (in6p == 0)
1.53      itojun    766:                                return rcvcnt;
                    767:                }
                    768:
                    769:                udp6_sendup(m, off, (struct sockaddr *)src, in6p->in6p_socket);
                    770:                rcvcnt++;
                    771:        }
                    772:
                    773: bad:
                    774:        return rcvcnt;
                    775: }
                    776: #endif
1.1       cgd       777:
1.72      itojun    778: #ifdef INET
1.1       cgd       779: /*
                    780:  * Notify a udp user of an asynchronous error;
                    781:  * just wake up so that he can collect error status.
                    782:  */
1.7       mycroft   783: static void
1.1       cgd       784: udp_notify(inp, errno)
1.66      augustss  785:        struct inpcb *inp;
1.7       mycroft   786:        int errno;
1.1       cgd       787: {
1.34      mycroft   788:
1.1       cgd       789:        inp->inp_socket->so_error = errno;
                    790:        sorwakeup(inp->inp_socket);
                    791:        sowwakeup(inp->inp_socket);
                    792: }
                    793:
1.27      christos  794: void *
                    795: udp_ctlinput(cmd, sa, v)
1.1       cgd       796:        int cmd;
                    797:        struct sockaddr *sa;
1.27      christos  798:        void *v;
1.1       cgd       799: {
1.66      augustss  800:        struct ip *ip = v;
                    801:        struct udphdr *uh;
1.18      mycroft   802:        void (*notify) __P((struct inpcb *, int)) = udp_notify;
1.21      mycroft   803:        int errno;
1.1       cgd       804:
1.53      itojun    805:        if (sa->sa_family != AF_INET
                    806:         || sa->sa_len != sizeof(struct sockaddr_in))
1.51      itojun    807:                return NULL;
1.20      mycroft   808:        if ((unsigned)cmd >= PRC_NCMDS)
1.27      christos  809:                return NULL;
1.20      mycroft   810:        errno = inetctlerrmap[cmd];
1.18      mycroft   811:        if (PRC_IS_REDIRECT(cmd))
1.19      mycroft   812:                notify = in_rtchange, ip = 0;
1.18      mycroft   813:        else if (cmd == PRC_HOSTDEAD)
1.19      mycroft   814:                ip = 0;
1.23      cgd       815:        else if (errno == 0)
1.27      christos  816:                return NULL;
1.19      mycroft   817:        if (ip) {
1.1       cgd       818:                uh = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2));
1.34      mycroft   819:                in_pcbnotify(&udbtable, satosin(sa)->sin_addr, uh->uh_dport,
                    820:                    ip->ip_src, uh->uh_sport, errno, notify);
1.53      itojun    821:
                    822:                /* XXX mapped address case */
1.19      mycroft   823:        } else
1.34      mycroft   824:                in_pcbnotifyall(&udbtable, satosin(sa)->sin_addr, errno,
                    825:                    notify);
1.27      christos  826:        return NULL;
1.1       cgd       827: }
                    828:
1.7       mycroft   829: int
1.27      christos  830: #if __STDC__
                    831: udp_output(struct mbuf *m, ...)
                    832: #else
                    833: udp_output(m, va_alist)
                    834:        struct mbuf *m;
                    835:        va_dcl
                    836: #endif
                    837: {
1.66      augustss  838:        struct inpcb *inp;
                    839:        struct udpiphdr *ui;
                    840:        int len = m->m_pkthdr.len;
1.31      mycroft   841:        int error = 0;
1.27      christos  842:        va_list ap;
                    843:
1.98      matt      844:        MCLAIM(m, &udp_tx_mowner);
1.27      christos  845:        va_start(ap, m);
                    846:        inp = va_arg(ap, struct inpcb *);
                    847:        va_end(ap);
1.1       cgd       848:
                    849:        /*
                    850:         * Calculate data length and get a mbuf
                    851:         * for UDP and IP headers.
                    852:         */
1.13      mycroft   853:        M_PREPEND(m, sizeof(struct udpiphdr), M_DONTWAIT);
                    854:        if (m == 0) {
                    855:                error = ENOBUFS;
1.39      thorpej   856:                goto release;
                    857:        }
                    858:
                    859:        /*
                    860:         * Compute the packet length of the IP header, and
                    861:         * punt if the length looks bogus.
                    862:         */
1.96      itojun    863:        if (len + sizeof(struct udpiphdr) > IP_MAXPACKET) {
1.39      thorpej   864:                error = EMSGSIZE;
1.13      mycroft   865:                goto release;
                    866:        }
1.1       cgd       867:
                    868:        /*
                    869:         * Fill in mbuf with extended UDP header
                    870:         * and addresses and length put into network format.
                    871:         */
                    872:        ui = mtod(m, struct udpiphdr *);
                    873:        ui->ui_pr = IPPROTO_UDP;
                    874:        ui->ui_src = inp->inp_laddr;
                    875:        ui->ui_dst = inp->inp_faddr;
                    876:        ui->ui_sport = inp->inp_lport;
                    877:        ui->ui_dport = inp->inp_fport;
1.78      thorpej   878:        ui->ui_ulen = htons((u_int16_t)len + sizeof(struct udphdr));
1.1       cgd       879:
                    880:        /*
1.78      thorpej   881:         * Set up checksum and output datagram.
1.1       cgd       882:         */
                    883:        if (udpcksum) {
1.78      thorpej   884:                /*
                    885:                 * XXX Cache pseudo-header checksum part for
                    886:                 * XXX "connected" UDP sockets.
                    887:                 */
                    888:                ui->ui_sum = in_cksum_phdr(ui->ui_src.s_addr,
                    889:                    ui->ui_dst.s_addr, htons((u_int16_t)len +
                    890:                    sizeof(struct udphdr) + IPPROTO_UDP));
                    891:                m->m_pkthdr.csum_flags = M_CSUM_UDPv4;
                    892:                m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum);
                    893:        } else
                    894:                ui->ui_sum = 0;
1.96      itojun    895:        ((struct ip *)ui)->ip_len = htons(sizeof (struct udpiphdr) + len);
1.1       cgd       896:        ((struct ip *)ui)->ip_ttl = inp->inp_ip.ip_ttl; /* XXX */
                    897:        ((struct ip *)ui)->ip_tos = inp->inp_ip.ip_tos; /* XXX */
                    898:        udpstat.udps_opackets++;
1.48      itojun    899:
                    900: #ifdef IPSEC
1.75      itojun    901:        if (ipsec_setsocket(m, inp->inp_socket) != 0) {
                    902:                error = ENOBUFS;
                    903:                goto release;
                    904:        }
1.48      itojun    905: #endif /*IPSEC*/
                    906:
1.31      mycroft   907:        return (ip_output(m, inp->inp_options, &inp->inp_route,
1.12      mycroft   908:            inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST),
1.31      mycroft   909:            inp->inp_moptions));
1.1       cgd       910:
                    911: release:
                    912:        m_freem(m);
                    913:        return (error);
                    914: }
                    915:
1.42      thorpej   916: int    udp_sendspace = 9216;           /* really max datagram size */
                    917: int    udp_recvspace = 40 * (1024 + sizeof(struct sockaddr_in));
1.1       cgd       918:                                        /* 40 1K datagrams */
                    919:
                    920: /*ARGSUSED*/
1.7       mycroft   921: int
1.31      mycroft   922: udp_usrreq(so, req, m, nam, control, p)
1.1       cgd       923:        struct socket *so;
                    924:        int req;
1.31      mycroft   925:        struct mbuf *m, *nam, *control;
1.30      mycroft   926:        struct proc *p;
1.1       cgd       927: {
1.66      augustss  928:        struct inpcb *inp;
1.1       cgd       929:        int s;
1.66      augustss  930:        int error = 0;
1.1       cgd       931:
                    932:        if (req == PRU_CONTROL)
1.31      mycroft   933:                return (in_control(so, (long)m, (caddr_t)nam,
1.30      mycroft   934:                    (struct ifnet *)control, p));
1.59      thorpej   935:
1.60      thorpej   936:        if (req == PRU_PURGEIF) {
1.80      itojun    937:                in_pcbpurgeif0(&udbtable, (struct ifnet *)control);
1.60      thorpej   938:                in_purgeif((struct ifnet *)control);
                    939:                in_pcbpurgeif(&udbtable, (struct ifnet *)control);
1.59      thorpej   940:                return (0);
                    941:        }
1.31      mycroft   942:
                    943:        s = splsoftnet();
                    944:        inp = sotoinpcb(so);
1.32      mycroft   945: #ifdef DIAGNOSTIC
                    946:        if (req != PRU_SEND && req != PRU_SENDOOB && control)
                    947:                panic("udp_usrreq: unexpected control mbuf");
                    948: #endif
1.31      mycroft   949:        if (inp == 0 && req != PRU_ATTACH) {
                    950:                error = EINVAL;
                    951:                goto release;
                    952:        }
                    953:
1.1       cgd       954:        /*
                    955:         * Note: need to block udp_input while changing
                    956:         * the udp pcb queue and/or pcb addresses.
                    957:         */
                    958:        switch (req) {
                    959:
                    960:        case PRU_ATTACH:
1.31      mycroft   961:                if (inp != 0) {
                    962:                        error = EISCONN;
1.1       cgd       963:                        break;
                    964:                }
1.98      matt      965: #ifdef MBUFTRACE
                    966:                so->so_mowner = &udp_mowner;
                    967:                so->so_rcv.sb_mowner = &udp_rx_mowner;
                    968:                so->so_snd.sb_mowner = &udp_tx_mowner;
                    969: #endif
1.31      mycroft   970:                if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
                    971:                        error = soreserve(so, udp_sendspace, udp_recvspace);
                    972:                        if (error)
                    973:                                break;
                    974:                }
1.18      mycroft   975:                error = in_pcballoc(so, &udbtable);
1.1       cgd       976:                if (error)
                    977:                        break;
1.31      mycroft   978:                inp = sotoinpcb(so);
                    979:                inp->inp_ip.ip_ttl = ip_defttl;
1.1       cgd       980:                break;
                    981:
                    982:        case PRU_DETACH:
1.31      mycroft   983:                in_pcbdetach(inp);
1.1       cgd       984:                break;
                    985:
                    986:        case PRU_BIND:
1.31      mycroft   987:                error = in_pcbbind(inp, nam, p);
1.1       cgd       988:                break;
                    989:
                    990:        case PRU_LISTEN:
                    991:                error = EOPNOTSUPP;
                    992:                break;
                    993:
                    994:        case PRU_CONNECT:
1.31      mycroft   995:                error = in_pcbconnect(inp, nam);
                    996:                if (error)
1.1       cgd       997:                        break;
1.31      mycroft   998:                soisconnected(so);
1.1       cgd       999:                break;
                   1000:
                   1001:        case PRU_CONNECT2:
                   1002:                error = EOPNOTSUPP;
                   1003:                break;
                   1004:
                   1005:        case PRU_DISCONNECT:
1.31      mycroft  1006:                /*soisdisconnected(so);*/
                   1007:                so->so_state &= ~SS_ISCONNECTED;        /* XXX */
1.1       cgd      1008:                in_pcbdisconnect(inp);
1.34      mycroft  1009:                inp->inp_laddr = zeroin_addr;           /* XXX */
1.100   ! matt     1010:                if (inp->inp_ia != NULL) {
        !          1011:                        LIST_REMOVE(inp, inp_ialink);
        !          1012:                        IFAFREE(&inp->inp_ia->ia_ifa);
        !          1013:                        inp->inp_ia = NULL;
        !          1014:                }
1.35      mycroft  1015:                in_pcbstate(inp, INP_BOUND);            /* XXX */
1.1       cgd      1016:                break;
                   1017:
                   1018:        case PRU_SHUTDOWN:
                   1019:                socantsendmore(so);
                   1020:                break;
                   1021:
1.31      mycroft  1022:        case PRU_RCVD:
                   1023:                error = EOPNOTSUPP;
1.1       cgd      1024:                break;
                   1025:
1.31      mycroft  1026:        case PRU_SEND:
1.32      mycroft  1027:                if (control && control->m_len) {
                   1028:                        m_freem(control);
                   1029:                        m_freem(m);
                   1030:                        error = EINVAL;
                   1031:                        break;
                   1032:                }
1.31      mycroft  1033:        {
1.35      mycroft  1034:                struct in_addr laddr;                   /* XXX */
1.1       cgd      1035:
1.31      mycroft  1036:                if (nam) {
1.35      mycroft  1037:                        laddr = inp->inp_laddr;         /* XXX */
1.31      mycroft  1038:                        if ((so->so_state & SS_ISCONNECTED) != 0) {
                   1039:                                error = EISCONN;
1.32      mycroft  1040:                                goto die;
1.31      mycroft  1041:                        }
                   1042:                        error = in_pcbconnect(inp, nam);
1.100   ! matt     1043:                        if (error)
        !          1044:                                goto die;
1.31      mycroft  1045:                } else {
                   1046:                        if ((so->so_state & SS_ISCONNECTED) == 0) {
                   1047:                                error = ENOTCONN;
1.32      mycroft  1048:                                goto die;
1.31      mycroft  1049:                        }
                   1050:                }
1.33      mycroft  1051:                error = udp_output(m, inp);
1.100   ! matt     1052:                m = NULL;
1.31      mycroft  1053:                if (nam) {
                   1054:                        in_pcbdisconnect(inp);
1.35      mycroft  1055:                        inp->inp_laddr = laddr;         /* XXX */
                   1056:                        in_pcbstate(inp, INP_BOUND);    /* XXX */
1.31      mycroft  1057:                }
1.100   ! matt     1058:          die:
        !          1059:                if (inp->inp_ia != NULL && in_nullhost(inp->inp_laddr)) {
        !          1060:                        LIST_REMOVE(inp, inp_ialink);
        !          1061:                        IFAFREE(&inp->inp_ia->ia_ifa);
        !          1062:                        inp->inp_ia = NULL;
        !          1063:                }
        !          1064:                if (m)
        !          1065:                        m_freem(m);
1.31      mycroft  1066:        }
1.1       cgd      1067:                break;
                   1068:
                   1069:        case PRU_SENSE:
                   1070:                /*
                   1071:                 * stat: don't bother with a blocksize.
                   1072:                 */
1.31      mycroft  1073:                splx(s);
1.1       cgd      1074:                return (0);
                   1075:
1.31      mycroft  1076:        case PRU_RCVOOB:
                   1077:                error =  EOPNOTSUPP;
                   1078:                break;
                   1079:
1.1       cgd      1080:        case PRU_SENDOOB:
1.32      mycroft  1081:                m_freem(control);
1.31      mycroft  1082:                m_freem(m);
1.1       cgd      1083:                error =  EOPNOTSUPP;
                   1084:                break;
                   1085:
1.31      mycroft  1086:        case PRU_SOCKADDR:
                   1087:                in_setsockaddr(inp, nam);
                   1088:                break;
                   1089:
                   1090:        case PRU_PEERADDR:
                   1091:                in_setpeeraddr(inp, nam);
                   1092:                break;
1.1       cgd      1093:
                   1094:        default:
                   1095:                panic("udp_usrreq");
                   1096:        }
                   1097:
                   1098: release:
1.31      mycroft  1099:        splx(s);
1.1       cgd      1100:        return (error);
1.13      mycroft  1101: }
                   1102:
                   1103: /*
                   1104:  * Sysctl for udp variables.
                   1105:  */
1.27      christos 1106: int
1.13      mycroft  1107: udp_sysctl(name, namelen, oldp, oldlenp, newp, newlen)
                   1108:        int *name;
                   1109:        u_int namelen;
                   1110:        void *oldp;
                   1111:        size_t *oldlenp;
                   1112:        void *newp;
                   1113:        size_t newlen;
                   1114: {
                   1115:        /* All sysctl names at this level are terminal. */
                   1116:        if (namelen != 1)
                   1117:                return (ENOTDIR);
                   1118:
                   1119:        switch (name[0]) {
                   1120:        case UDPCTL_CHECKSUM:
                   1121:                return (sysctl_int(oldp, oldlenp, newp, newlen, &udpcksum));
1.42      thorpej  1122:        case UDPCTL_SENDSPACE:
                   1123:                return (sysctl_int(oldp, oldlenp, newp, newlen,
                   1124:                    &udp_sendspace));
                   1125:        case UDPCTL_RECVSPACE:
1.94      itojun   1126:                return (sysctl_int(oldp, oldlenp, newp, newlen,
1.42      thorpej  1127:                    &udp_recvspace));
1.13      mycroft  1128:        default:
                   1129:                return (ENOPROTOOPT);
                   1130:        }
                   1131:        /* NOTREACHED */
1.1       cgd      1132: }
1.72      itojun   1133: #endif

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