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Annotation of src/sys/netinet/udp_usrreq.c, Revision 1.75.2.8

1.75.2.8! nathanw     1: /*     $NetBSD$        */
1.48      itojun      2:
                      3: /*
                      4:  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
                      5:  * All rights reserved.
1.75.2.7  nathanw     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.
1.75.2.7  nathanw    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:  */
1.50      thorpej    66:
1.75.2.5  nathanw    67: #include <sys/cdefs.h>
1.75.2.8! nathanw    68: __KERNEL_RCSID(0, "$NetBSD$");
1.75.2.5  nathanw    69:
1.75.2.1  nathanw    70: #include "opt_inet.h"
1.50      thorpej    71: #include "opt_ipsec.h"
1.75.2.1  nathanw    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:
1.75.2.1  nathanw   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
                    141:
1.75.2.7  nathanw   142: struct inpcbtable udbtable;
                    143: struct udpstat udpstat;
                    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:
1.75.2.1  nathanw   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
1.75.2.1  nathanw   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
1.75.2.8! nathanw   265:        KASSERT(UDP_HDR_ALIGNED_P(uh));
1.53      itojun    266:
1.57      itojun    267:        /* destination port of 0 is illegal, based on RFC768. */
                    268:        if (uh->uh_dport == 0)
                    269:                goto bad;
                    270:
1.53      itojun    271:        /*
                    272:         * Make mbuf data length reflect UDP length.
                    273:         * If not enough data to reflect UDP length, drop.
                    274:         */
                    275:        len = ntohs((u_int16_t)uh->uh_ulen);
                    276:        if (ip->ip_len != iphlen + len) {
1.70      sommerfe  277:                if (ip->ip_len < iphlen + len || len < sizeof(struct udphdr)) {
1.53      itojun    278:                        udpstat.udps_badlen++;
                    279:                        goto bad;
                    280:                }
                    281:                m_adj(m, iphlen + len - ip->ip_len);
                    282:        }
                    283:
                    284:        /*
                    285:         * Checksum extended UDP header and data.
                    286:         */
                    287:        if (uh->uh_sum) {
1.75.2.1  nathanw   288:                switch (m->m_pkthdr.csum_flags &
1.75.2.3  nathanw   289:                        ((m->m_pkthdr.rcvif->if_csum_flags_rx & M_CSUM_UDPv4) |
1.75.2.1  nathanw   290:                         M_CSUM_TCP_UDP_BAD | M_CSUM_DATA)) {
                    291:                case M_CSUM_UDPv4|M_CSUM_TCP_UDP_BAD:
                    292:                        UDP_CSUM_COUNTER_INCR(&udp_hwcsum_bad);
                    293:                        goto badcsum;
                    294:
                    295:                case M_CSUM_UDPv4|M_CSUM_DATA:
                    296:                        UDP_CSUM_COUNTER_INCR(&udp_hwcsum_data);
                    297:                        if ((m->m_pkthdr.csum_data ^ 0xffff) != 0)
                    298:                                goto badcsum;
                    299:                        break;
                    300:
                    301:                case M_CSUM_UDPv4:
                    302:                        /* Checksum was okay. */
                    303:                        UDP_CSUM_COUNTER_INCR(&udp_hwcsum_ok);
                    304:                        break;
                    305:
                    306:                default:
                    307:                        /* Need to compute it ourselves. */
                    308:                        UDP_CSUM_COUNTER_INCR(&udp_swcsum);
                    309:                        if (in4_cksum(m, IPPROTO_UDP, iphlen, len) != 0)
                    310:                                goto badcsum;
                    311:                        break;
1.53      itojun    312:                }
                    313:        }
                    314:
                    315:        /* construct source and dst sockaddrs. */
                    316:        bzero(&src, sizeof(src));
                    317:        src.sin_family = AF_INET;
                    318:        src.sin_len = sizeof(struct sockaddr_in);
                    319:        bcopy(&ip->ip_src, &src.sin_addr, sizeof(src.sin_addr));
                    320:        src.sin_port = uh->uh_sport;
                    321:        bzero(&dst, sizeof(dst));
                    322:        dst.sin_family = AF_INET;
                    323:        dst.sin_len = sizeof(struct sockaddr_in);
                    324:        bcopy(&ip->ip_dst, &dst.sin_addr, sizeof(dst.sin_addr));
                    325:        dst.sin_port = uh->uh_dport;
                    326:
                    327:        n = udp4_realinput(&src, &dst, m, iphlen);
                    328: #ifdef INET6
                    329:        if (IN_MULTICAST(ip->ip_dst.s_addr) || n == 0) {
                    330:                struct sockaddr_in6 src6, dst6;
                    331:
                    332:                bzero(&src6, sizeof(src6));
                    333:                src6.sin6_family = AF_INET6;
                    334:                src6.sin6_len = sizeof(struct sockaddr_in6);
                    335:                src6.sin6_addr.s6_addr[10] = src6.sin6_addr.s6_addr[11] = 0xff;
                    336:                bcopy(&ip->ip_src, &src6.sin6_addr.s6_addr[12],
                    337:                        sizeof(ip->ip_src));
                    338:                src6.sin6_port = uh->uh_sport;
                    339:                bzero(&dst6, sizeof(dst6));
                    340:                dst6.sin6_family = AF_INET6;
                    341:                dst6.sin6_len = sizeof(struct sockaddr_in6);
                    342:                dst6.sin6_addr.s6_addr[10] = dst6.sin6_addr.s6_addr[11] = 0xff;
                    343:                bcopy(&ip->ip_dst, &dst6.sin6_addr.s6_addr[12],
                    344:                        sizeof(ip->ip_dst));
                    345:                dst6.sin6_port = uh->uh_dport;
                    346:
                    347:                n += udp6_realinput(AF_INET, &src6, &dst6, m, iphlen);
                    348:        }
                    349: #endif
                    350:
                    351:        if (n == 0) {
                    352:                if (m->m_flags & (M_BCAST | M_MCAST)) {
                    353:                        udpstat.udps_noportbcast++;
                    354:                        goto bad;
                    355:                }
1.61      itojun    356:                udpstat.udps_noport++;
1.64      ws        357: #ifdef IPKDB
1.53      itojun    358:                if (checkipkdb(&ip->ip_src, uh->uh_sport, uh->uh_dport,
                    359:                                m, iphlen + sizeof(struct udphdr),
                    360:                                m->m_pkthdr.len - iphlen - sizeof(struct udphdr))) {
                    361:                        /*
                    362:                         * It was a debugger connect packet,
                    363:                         * just drop it now
                    364:                         */
                    365:                        goto bad;
                    366:                }
                    367: #endif
                    368:                icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0);
                    369:                m = NULL;
                    370:        }
                    371:
                    372: bad:
                    373:        if (m)
                    374:                m_freem(m);
1.75.2.1  nathanw   375:        return;
                    376:
                    377: badcsum:
                    378:        m_freem(m);
                    379:        udpstat.udps_badsum++;
1.53      itojun    380: }
1.72      itojun    381: #endif
1.53      itojun    382:
                    383: #ifdef INET6
                    384: int
                    385: udp6_input(mp, offp, proto)
                    386:        struct mbuf **mp;
                    387:        int *offp, proto;
                    388: {
                    389:        struct mbuf *m = *mp;
                    390:        int off = *offp;
                    391:        struct sockaddr_in6 src, dst;
                    392:        struct ip6_hdr *ip6;
                    393:        struct udphdr *uh;
                    394:        u_int32_t plen, ulen;
                    395:
1.75.2.1  nathanw   396: #ifndef PULLDOWN_TEST
                    397:        IP6_EXTHDR_CHECK(m, off, sizeof(struct udphdr), IPPROTO_DONE);
                    398: #endif
                    399:        ip6 = mtod(m, struct ip6_hdr *);
                    400:
1.53      itojun    401: #if defined(NFAITH) && 0 < NFAITH
1.75.2.1  nathanw   402:        if (faithprefix(&ip6->ip6_dst)) {
                    403:                /* send icmp6 host unreach? */
                    404:                m_freem(m);
                    405:                return IPPROTO_DONE;
1.53      itojun    406:        }
                    407: #endif
                    408:
                    409:        udp6stat.udp6s_ipackets++;
                    410:
                    411:        /* check for jumbogram is done in ip6_input.  we can trust pkthdr.len */
                    412:        plen = m->m_pkthdr.len - off;
                    413: #ifndef PULLDOWN_TEST
                    414:        uh = (struct udphdr *)((caddr_t)ip6 + off);
                    415: #else
                    416:        IP6_EXTHDR_GET(uh, struct udphdr *, m, off, sizeof(struct udphdr));
                    417:        if (uh == NULL) {
                    418:                ip6stat.ip6s_tooshort++;
                    419:                return IPPROTO_DONE;
                    420:        }
                    421: #endif
1.75.2.8! nathanw   422:        KASSERT(UDP_HDR_ALIGNED_P(uh));
1.53      itojun    423:        ulen = ntohs((u_short)uh->uh_ulen);
1.69      itojun    424:        /*
                    425:         * RFC2675 section 4: jumbograms will have 0 in the UDP header field,
                    426:         * iff payload length > 0xffff.
                    427:         */
1.53      itojun    428:        if (ulen == 0 && plen > 0xffff)
                    429:                ulen = plen;
                    430:
                    431:        if (plen != ulen) {
                    432:                udp6stat.udp6s_badlen++;
1.54      itojun    433:                goto bad;
                    434:        }
                    435:
1.57      itojun    436:        /* destination port of 0 is illegal, based on RFC768. */
                    437:        if (uh->uh_dport == 0)
                    438:                goto bad;
                    439:
1.54      itojun    440:        /* Be proactive about malicious use of IPv4 mapped address */
                    441:        if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
                    442:            IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
                    443:                /* XXX stat */
1.53      itojun    444:                goto bad;
                    445:        }
                    446:
                    447:        /*
                    448:         * Checksum extended UDP header and data.
                    449:         */
                    450:        if (uh->uh_sum == 0)
                    451:                udp6stat.udp6s_nosum++;
                    452:        else if (in6_cksum(m, IPPROTO_UDP, off, ulen) != 0) {
                    453:                udp6stat.udp6s_badsum++;
                    454:                goto bad;
                    455:        }
                    456:
                    457:        /*
                    458:         * Construct source and dst sockaddrs.
                    459:         * Note that ifindex (s6_addr16[1]) is already filled.
                    460:         */
                    461:        bzero(&src, sizeof(src));
                    462:        src.sin6_family = AF_INET6;
                    463:        src.sin6_len = sizeof(struct sockaddr_in6);
1.69      itojun    464:        /* KAME hack: recover scopeid */
                    465:        (void)in6_recoverscope(&src, &ip6->ip6_src, m->m_pkthdr.rcvif);
1.53      itojun    466:        src.sin6_port = uh->uh_sport;
                    467:        bzero(&dst, sizeof(dst));
                    468:        dst.sin6_family = AF_INET6;
                    469:        dst.sin6_len = sizeof(struct sockaddr_in6);
1.69      itojun    470:        /* KAME hack: recover scopeid */
                    471:        (void)in6_recoverscope(&dst, &ip6->ip6_dst, m->m_pkthdr.rcvif);
1.53      itojun    472:        dst.sin6_port = uh->uh_dport;
                    473:
                    474:        if (udp6_realinput(AF_INET6, &src, &dst, m, off) == 0) {
                    475:                if (m->m_flags & M_MCAST) {
                    476:                        udp6stat.udp6s_noportmcast++;
                    477:                        goto bad;
                    478:                }
1.61      itojun    479:                udp6stat.udp6s_noport++;
1.53      itojun    480:                icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0);
                    481:                m = NULL;
                    482:        }
                    483:
                    484: bad:
                    485:        if (m)
                    486:                m_freem(m);
                    487:        return IPPROTO_DONE;
                    488: }
                    489: #endif
                    490:
1.72      itojun    491: #ifdef INET
1.53      itojun    492: static void
                    493: udp4_sendup(m, off, src, so)
                    494:        struct mbuf *m;
                    495:        int off;        /* offset of data portion */
                    496:        struct sockaddr *src;
                    497:        struct socket *so;
                    498: {
                    499:        struct mbuf *opts = NULL;
                    500:        struct mbuf *n;
                    501:        struct inpcb *inp = NULL;
                    502: #ifdef INET6
                    503:        struct in6pcb *in6p = NULL;
                    504: #endif
                    505:
                    506:        if (!so)
                    507:                return;
                    508:        switch (so->so_proto->pr_domain->dom_family) {
                    509:        case AF_INET:
                    510:                inp = sotoinpcb(so);
                    511:                break;
                    512: #ifdef INET6
                    513:        case AF_INET6:
                    514:                in6p = sotoin6pcb(so);
                    515:                break;
                    516: #endif
                    517:        default:
                    518:                return;
                    519:        }
                    520:
                    521: #ifdef IPSEC
                    522:        /* check AH/ESP integrity. */
                    523:        if (so != NULL && ipsec4_in_reject_so(m, so)) {
                    524:                ipsecstat.in_polvio++;
                    525:                return;
                    526:        }
                    527: #endif /*IPSEC*/
                    528:
                    529:        if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
                    530:                if (inp && (inp->inp_flags & INP_CONTROLOPTS
                    531:                         || so->so_options & SO_TIMESTAMP)) {
                    532:                        struct ip *ip = mtod(n, struct ip *);
                    533:                        ip_savecontrol(inp, &opts, ip, n);
                    534:                }
                    535:
                    536:                m_adj(n, off);
                    537:                if (sbappendaddr(&so->so_rcv, src, n,
                    538:                                opts) == 0) {
                    539:                        m_freem(n);
                    540:                        if (opts)
                    541:                                m_freem(opts);
1.75.2.2  nathanw   542:                        udpstat.udps_fullsock++;
1.53      itojun    543:                } else
                    544:                        sorwakeup(so);
                    545:        }
                    546: }
1.72      itojun    547: #endif
1.53      itojun    548:
                    549: #ifdef INET6
                    550: static void
                    551: udp6_sendup(m, off, src, so)
                    552:        struct mbuf *m;
                    553:        int off;        /* offset of data portion */
                    554:        struct sockaddr *src;
                    555:        struct socket *so;
                    556: {
                    557:        struct mbuf *opts = NULL;
                    558:        struct mbuf *n;
                    559:        struct in6pcb *in6p = NULL;
                    560:
                    561:        if (!so)
                    562:                return;
                    563:        if (so->so_proto->pr_domain->dom_family != AF_INET6)
                    564:                return;
                    565:        in6p = sotoin6pcb(so);
                    566:
                    567: #ifdef IPSEC
                    568:        /* check AH/ESP integrity. */
                    569:        if (so != NULL && ipsec6_in_reject_so(m, so)) {
                    570:                ipsec6stat.in_polvio++;
                    571:                return;
                    572:        }
                    573: #endif /*IPSEC*/
                    574:
                    575:        if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
                    576:                if (in6p && (in6p->in6p_flags & IN6P_CONTROLOPTS
                    577:                          || in6p->in6p_socket->so_options & SO_TIMESTAMP)) {
                    578:                        struct ip6_hdr *ip6 = mtod(n, struct ip6_hdr *);
                    579:                        ip6_savecontrol(in6p, &opts, ip6, n);
                    580:                }
                    581:
                    582:                m_adj(n, off);
                    583:                if (sbappendaddr(&so->so_rcv, src, n, opts) == 0) {
                    584:                        m_freem(n);
                    585:                        if (opts)
                    586:                                m_freem(opts);
                    587:                        udp6stat.udp6s_fullsock++;
                    588:                } else
                    589:                        sorwakeup(so);
                    590:        }
                    591: }
                    592: #endif
                    593:
1.72      itojun    594: #ifdef INET
1.53      itojun    595: static int
                    596: udp4_realinput(src, dst, m, off)
                    597:        struct sockaddr_in *src;
                    598:        struct sockaddr_in *dst;
                    599:        struct mbuf *m;
                    600:        int off;        /* offset of udphdr */
                    601: {
                    602:        u_int16_t *sport, *dport;
                    603:        int rcvcnt;
                    604:        struct in_addr *src4, *dst4;
                    605:        struct inpcb *inp;
                    606:
                    607:        rcvcnt = 0;
                    608:        off += sizeof(struct udphdr);   /* now, offset of payload */
                    609:
                    610:        if (src->sin_family != AF_INET || dst->sin_family != AF_INET)
                    611:                goto bad;
                    612:
                    613:        src4 = &src->sin_addr;
                    614:        sport = &src->sin_port;
                    615:        dst4 = &dst->sin_addr;
                    616:        dport = &dst->sin_port;
                    617:
1.73      itojun    618:        if (IN_MULTICAST(dst4->s_addr) ||
1.53      itojun    619:            in_broadcast(*dst4, m->m_pkthdr.rcvif)) {
                    620:                struct inpcb *last;
                    621:                /*
                    622:                 * Deliver a multicast or broadcast datagram to *all* sockets
                    623:                 * for which the local and remote addresses and ports match
                    624:                 * those of the incoming datagram.  This allows more than
                    625:                 * one process to receive multi/broadcasts on the same port.
                    626:                 * (This really ought to be done for unicast datagrams as
                    627:                 * well, but that would cause problems with existing
                    628:                 * applications that open both address-specific sockets and
                    629:                 * a wildcard socket listening to the same port -- they would
                    630:                 * end up receiving duplicates of every unicast datagram.
                    631:                 * Those applications open the multiple sockets to overcome an
                    632:                 * inadequacy of the UDP socket interface, but for backwards
                    633:                 * compatibility we avoid the problem here rather than
                    634:                 * fixing the interface.  Maybe 4.5BSD will remedy this?)
                    635:                 */
                    636:
                    637:                /*
1.75.2.6  nathanw   638:                 * KAME note: traditionally we dropped udpiphdr from mbuf here.
1.71      itojun    639:                 * we need udpiphdr for IPsec processing so we do that later.
1.53      itojun    640:                 */
                    641:                /*
                    642:                 * Locate pcb(s) for datagram.
                    643:                 */
1.75.2.5  nathanw   644:                CIRCLEQ_FOREACH(inp, &udbtable.inpt_queue, inp_queue) {
1.53      itojun    645:                        if (inp->inp_lport != *dport)
                    646:                                continue;
                    647:                        if (!in_nullhost(inp->inp_laddr)) {
                    648:                                if (!in_hosteq(inp->inp_laddr, *dst4))
                    649:                                        continue;
                    650:                        }
                    651:                        if (!in_nullhost(inp->inp_faddr)) {
                    652:                                if (!in_hosteq(inp->inp_faddr, *src4) ||
                    653:                                    inp->inp_fport != *sport)
                    654:                                        continue;
                    655:                        }
                    656:
                    657:                        last = inp;
                    658:                        udp4_sendup(m, off, (struct sockaddr *)src,
                    659:                                inp->inp_socket);
                    660:                        rcvcnt++;
                    661:
                    662:                        /*
                    663:                         * Don't look for additional matches if this one does
                    664:                         * not have either the SO_REUSEPORT or SO_REUSEADDR
                    665:                         * socket options set.  This heuristic avoids searching
                    666:                         * through all pcbs in the common case of a non-shared
                    667:                         * port.  It assumes that an application will never
                    668:                         * clear these options after setting them.
                    669:                         */
                    670:                        if ((inp->inp_socket->so_options &
                    671:                            (SO_REUSEPORT|SO_REUSEADDR)) == 0)
                    672:                                break;
                    673:                }
                    674:        } else {
                    675:                /*
                    676:                 * Locate pcb for datagram.
                    677:                 */
                    678:                inp = in_pcblookup_connect(&udbtable, *src4, *sport, *dst4, *dport);
                    679:                if (inp == 0) {
                    680:                        ++udpstat.udps_pcbhashmiss;
                    681:                        inp = in_pcblookup_bind(&udbtable, *dst4, *dport);
1.75.2.2  nathanw   682:                        if (inp == 0)
1.53      itojun    683:                                return rcvcnt;
                    684:                }
                    685:
                    686:                udp4_sendup(m, off, (struct sockaddr *)src, inp->inp_socket);
                    687:                rcvcnt++;
                    688:        }
                    689:
                    690: bad:
                    691:        return rcvcnt;
                    692: }
1.72      itojun    693: #endif
1.53      itojun    694:
                    695: #ifdef INET6
                    696: static int
                    697: udp6_realinput(af, src, dst, m, off)
                    698:        int af;         /* af on packet */
                    699:        struct sockaddr_in6 *src;
                    700:        struct sockaddr_in6 *dst;
                    701:        struct mbuf *m;
                    702:        int off;        /* offset of udphdr */
                    703: {
1.75.2.2  nathanw   704:        u_int16_t sport, dport;
1.53      itojun    705:        int rcvcnt;
1.75.2.2  nathanw   706:        struct in6_addr src6, dst6;
                    707:        const struct in_addr *dst4;
1.53      itojun    708:        struct in6pcb *in6p;
                    709:
                    710:        rcvcnt = 0;
                    711:        off += sizeof(struct udphdr);   /* now, offset of payload */
                    712:
                    713:        if (af != AF_INET && af != AF_INET6)
                    714:                goto bad;
                    715:        if (src->sin6_family != AF_INET6 || dst->sin6_family != AF_INET6)
                    716:                goto bad;
                    717:
1.75.2.2  nathanw   718:        in6_embedscope(&src6, src, NULL, NULL);
                    719:        sport = src->sin6_port;
                    720:        in6_embedscope(&dst6, dst, NULL, NULL);
                    721:        dport = dst->sin6_port;
1.75.2.5  nathanw   722:        dst4 = (struct in_addr *)&dst->sin6_addr.s6_addr[12];
1.53      itojun    723:
1.75.2.2  nathanw   724:        if (IN6_IS_ADDR_MULTICAST(&dst6) ||
                    725:            (af == AF_INET && IN_MULTICAST(dst4->s_addr))) {
1.53      itojun    726:                struct in6pcb *last;
                    727:                /*
                    728:                 * Deliver a multicast or broadcast datagram to *all* sockets
                    729:                 * for which the local and remote addresses and ports match
                    730:                 * those of the incoming datagram.  This allows more than
                    731:                 * one process to receive multi/broadcasts on the same port.
                    732:                 * (This really ought to be done for unicast datagrams as
                    733:                 * well, but that would cause problems with existing
                    734:                 * applications that open both address-specific sockets and
                    735:                 * a wildcard socket listening to the same port -- they would
                    736:                 * end up receiving duplicates of every unicast datagram.
                    737:                 * Those applications open the multiple sockets to overcome an
                    738:                 * inadequacy of the UDP socket interface, but for backwards
                    739:                 * compatibility we avoid the problem here rather than
                    740:                 * fixing the interface.  Maybe 4.5BSD will remedy this?)
                    741:                 */
                    742:
                    743:                /*
1.75.2.6  nathanw   744:                 * KAME note: traditionally we dropped udpiphdr from mbuf here.
1.71      itojun    745:                 * we need udpiphdr for IPsec processing so we do that later.
1.53      itojun    746:                 */
                    747:                /*
                    748:                 * Locate pcb(s) for datagram.
                    749:                 */
                    750:                for (in6p = udb6.in6p_next; in6p != &udb6;
                    751:                     in6p = in6p->in6p_next) {
1.75.2.2  nathanw   752:                        if (in6p->in6p_lport != dport)
1.53      itojun    753:                                continue;
                    754:                        if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) {
1.75.2.5  nathanw   755:                                if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &dst6))
1.53      itojun    756:                                        continue;
1.75.2.6  nathanw   757:                        } else {
1.75.2.2  nathanw   758:                                if (IN6_IS_ADDR_V4MAPPED(&dst6) &&
1.75.2.4  nathanw   759:                                    (in6p->in6p_flags & IN6P_IPV6_V6ONLY))
1.55      itojun    760:                                        continue;
                    761:                        }
1.53      itojun    762:                        if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
1.75.2.2  nathanw   763:                                if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr,
                    764:                                    &src6) || in6p->in6p_fport != sport)
1.53      itojun    765:                                        continue;
1.75.2.6  nathanw   766:                        } else {
1.75.2.2  nathanw   767:                                if (IN6_IS_ADDR_V4MAPPED(&src6) &&
1.75.2.4  nathanw   768:                                    (in6p->in6p_flags & IN6P_IPV6_V6ONLY))
1.55      itojun    769:                                        continue;
                    770:                        }
1.53      itojun    771:
                    772:                        last = in6p;
                    773:                        udp6_sendup(m, off, (struct sockaddr *)src,
                    774:                                in6p->in6p_socket);
                    775:                        rcvcnt++;
                    776:
                    777:                        /*
                    778:                         * Don't look for additional matches if this one does
                    779:                         * not have either the SO_REUSEPORT or SO_REUSEADDR
                    780:                         * socket options set.  This heuristic avoids searching
                    781:                         * through all pcbs in the common case of a non-shared
                    782:                         * port.  It assumes that an application will never
                    783:                         * clear these options after setting them.
                    784:                         */
                    785:                        if ((in6p->in6p_socket->so_options &
                    786:                            (SO_REUSEPORT|SO_REUSEADDR)) == 0)
                    787:                                break;
                    788:                }
                    789:        } else {
                    790:                /*
                    791:                 * Locate pcb for datagram.
                    792:                 */
1.75.2.2  nathanw   793:                in6p = in6_pcblookup_connect(&udb6, &src6, sport,
                    794:                    &dst6, dport, 0);
1.53      itojun    795:                if (in6p == 0) {
                    796:                        ++udpstat.udps_pcbhashmiss;
1.75.2.2  nathanw   797:                        in6p = in6_pcblookup_bind(&udb6, &dst6, dport, 0);
                    798:                        if (in6p == 0)
1.53      itojun    799:                                return rcvcnt;
                    800:                }
                    801:
                    802:                udp6_sendup(m, off, (struct sockaddr *)src, in6p->in6p_socket);
                    803:                rcvcnt++;
                    804:        }
                    805:
                    806: bad:
                    807:        return rcvcnt;
                    808: }
                    809: #endif
1.1       cgd       810:
1.72      itojun    811: #ifdef INET
1.1       cgd       812: /*
                    813:  * Notify a udp user of an asynchronous error;
                    814:  * just wake up so that he can collect error status.
                    815:  */
1.7       mycroft   816: static void
1.1       cgd       817: udp_notify(inp, errno)
1.66      augustss  818:        struct inpcb *inp;
1.7       mycroft   819:        int errno;
1.1       cgd       820: {
1.34      mycroft   821:
1.1       cgd       822:        inp->inp_socket->so_error = errno;
                    823:        sorwakeup(inp->inp_socket);
                    824:        sowwakeup(inp->inp_socket);
                    825: }
                    826:
1.27      christos  827: void *
                    828: udp_ctlinput(cmd, sa, v)
1.1       cgd       829:        int cmd;
                    830:        struct sockaddr *sa;
1.27      christos  831:        void *v;
1.1       cgd       832: {
1.66      augustss  833:        struct ip *ip = v;
                    834:        struct udphdr *uh;
1.18      mycroft   835:        void (*notify) __P((struct inpcb *, int)) = udp_notify;
1.21      mycroft   836:        int errno;
1.1       cgd       837:
1.53      itojun    838:        if (sa->sa_family != AF_INET
                    839:         || sa->sa_len != sizeof(struct sockaddr_in))
1.51      itojun    840:                return NULL;
1.20      mycroft   841:        if ((unsigned)cmd >= PRC_NCMDS)
1.27      christos  842:                return NULL;
1.20      mycroft   843:        errno = inetctlerrmap[cmd];
1.18      mycroft   844:        if (PRC_IS_REDIRECT(cmd))
1.19      mycroft   845:                notify = in_rtchange, ip = 0;
1.18      mycroft   846:        else if (cmd == PRC_HOSTDEAD)
1.19      mycroft   847:                ip = 0;
1.23      cgd       848:        else if (errno == 0)
1.27      christos  849:                return NULL;
1.19      mycroft   850:        if (ip) {
1.1       cgd       851:                uh = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2));
1.34      mycroft   852:                in_pcbnotify(&udbtable, satosin(sa)->sin_addr, uh->uh_dport,
                    853:                    ip->ip_src, uh->uh_sport, errno, notify);
1.53      itojun    854:
                    855:                /* XXX mapped address case */
1.19      mycroft   856:        } else
1.34      mycroft   857:                in_pcbnotifyall(&udbtable, satosin(sa)->sin_addr, errno,
                    858:                    notify);
1.27      christos  859:        return NULL;
1.1       cgd       860: }
                    861:
1.7       mycroft   862: int
1.27      christos  863: #if __STDC__
                    864: udp_output(struct mbuf *m, ...)
                    865: #else
                    866: udp_output(m, va_alist)
                    867:        struct mbuf *m;
                    868:        va_dcl
                    869: #endif
                    870: {
1.66      augustss  871:        struct inpcb *inp;
                    872:        struct udpiphdr *ui;
                    873:        int len = m->m_pkthdr.len;
1.31      mycroft   874:        int error = 0;
1.27      christos  875:        va_list ap;
                    876:
                    877:        va_start(ap, m);
                    878:        inp = va_arg(ap, struct inpcb *);
                    879:        va_end(ap);
1.1       cgd       880:
                    881:        /*
                    882:         * Calculate data length and get a mbuf
                    883:         * for UDP and IP headers.
                    884:         */
1.13      mycroft   885:        M_PREPEND(m, sizeof(struct udpiphdr), M_DONTWAIT);
                    886:        if (m == 0) {
                    887:                error = ENOBUFS;
1.39      thorpej   888:                goto release;
                    889:        }
                    890:
                    891:        /*
                    892:         * Compute the packet length of the IP header, and
                    893:         * punt if the length looks bogus.
                    894:         */
                    895:        if ((len + sizeof(struct udpiphdr)) > IP_MAXPACKET) {
                    896:                error = EMSGSIZE;
1.13      mycroft   897:                goto release;
                    898:        }
1.1       cgd       899:
                    900:        /*
                    901:         * Fill in mbuf with extended UDP header
                    902:         * and addresses and length put into network format.
                    903:         */
                    904:        ui = mtod(m, struct udpiphdr *);
                    905:        ui->ui_pr = IPPROTO_UDP;
                    906:        ui->ui_src = inp->inp_laddr;
                    907:        ui->ui_dst = inp->inp_faddr;
                    908:        ui->ui_sport = inp->inp_lport;
                    909:        ui->ui_dport = inp->inp_fport;
1.75.2.1  nathanw   910:        ui->ui_ulen = htons((u_int16_t)len + sizeof(struct udphdr));
1.1       cgd       911:
                    912:        /*
1.75.2.1  nathanw   913:         * Set up checksum and output datagram.
1.1       cgd       914:         */
                    915:        if (udpcksum) {
1.75.2.1  nathanw   916:                /*
                    917:                 * XXX Cache pseudo-header checksum part for
                    918:                 * XXX "connected" UDP sockets.
                    919:                 */
                    920:                ui->ui_sum = in_cksum_phdr(ui->ui_src.s_addr,
                    921:                    ui->ui_dst.s_addr, htons((u_int16_t)len +
                    922:                    sizeof(struct udphdr) + IPPROTO_UDP));
                    923:                m->m_pkthdr.csum_flags = M_CSUM_UDPv4;
                    924:                m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum);
                    925:        } else
                    926:                ui->ui_sum = 0;
1.1       cgd       927:        ((struct ip *)ui)->ip_len = sizeof (struct udpiphdr) + len;
                    928:        ((struct ip *)ui)->ip_ttl = inp->inp_ip.ip_ttl; /* XXX */
                    929:        ((struct ip *)ui)->ip_tos = inp->inp_ip.ip_tos; /* XXX */
                    930:        udpstat.udps_opackets++;
1.48      itojun    931:
                    932: #ifdef IPSEC
1.75      itojun    933:        if (ipsec_setsocket(m, inp->inp_socket) != 0) {
                    934:                error = ENOBUFS;
                    935:                goto release;
                    936:        }
1.48      itojun    937: #endif /*IPSEC*/
                    938:
1.31      mycroft   939:        return (ip_output(m, inp->inp_options, &inp->inp_route,
1.12      mycroft   940:            inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST),
1.31      mycroft   941:            inp->inp_moptions));
1.1       cgd       942:
                    943: release:
                    944:        m_freem(m);
                    945:        return (error);
                    946: }
                    947:
1.42      thorpej   948: int    udp_sendspace = 9216;           /* really max datagram size */
                    949: int    udp_recvspace = 40 * (1024 + sizeof(struct sockaddr_in));
1.1       cgd       950:                                        /* 40 1K datagrams */
                    951:
                    952: /*ARGSUSED*/
1.7       mycroft   953: int
1.31      mycroft   954: udp_usrreq(so, req, m, nam, control, p)
1.1       cgd       955:        struct socket *so;
                    956:        int req;
1.31      mycroft   957:        struct mbuf *m, *nam, *control;
1.30      mycroft   958:        struct proc *p;
1.1       cgd       959: {
1.66      augustss  960:        struct inpcb *inp;
1.1       cgd       961:        int s;
1.66      augustss  962:        int error = 0;
1.1       cgd       963:
                    964:        if (req == PRU_CONTROL)
1.31      mycroft   965:                return (in_control(so, (long)m, (caddr_t)nam,
1.30      mycroft   966:                    (struct ifnet *)control, p));
1.59      thorpej   967:
1.60      thorpej   968:        if (req == PRU_PURGEIF) {
1.75.2.2  nathanw   969:                in_pcbpurgeif0(&udbtable, (struct ifnet *)control);
1.60      thorpej   970:                in_purgeif((struct ifnet *)control);
                    971:                in_pcbpurgeif(&udbtable, (struct ifnet *)control);
1.59      thorpej   972:                return (0);
                    973:        }
1.31      mycroft   974:
                    975:        s = splsoftnet();
                    976:        inp = sotoinpcb(so);
1.32      mycroft   977: #ifdef DIAGNOSTIC
                    978:        if (req != PRU_SEND && req != PRU_SENDOOB && control)
                    979:                panic("udp_usrreq: unexpected control mbuf");
                    980: #endif
1.31      mycroft   981:        if (inp == 0 && req != PRU_ATTACH) {
                    982:                error = EINVAL;
                    983:                goto release;
                    984:        }
                    985:
1.1       cgd       986:        /*
                    987:         * Note: need to block udp_input while changing
                    988:         * the udp pcb queue and/or pcb addresses.
                    989:         */
                    990:        switch (req) {
                    991:
                    992:        case PRU_ATTACH:
1.31      mycroft   993:                if (inp != 0) {
                    994:                        error = EISCONN;
1.1       cgd       995:                        break;
                    996:                }
1.31      mycroft   997:                if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
                    998:                        error = soreserve(so, udp_sendspace, udp_recvspace);
                    999:                        if (error)
                   1000:                                break;
                   1001:                }
1.18      mycroft  1002:                error = in_pcballoc(so, &udbtable);
1.1       cgd      1003:                if (error)
                   1004:                        break;
1.31      mycroft  1005:                inp = sotoinpcb(so);
                   1006:                inp->inp_ip.ip_ttl = ip_defttl;
1.1       cgd      1007:                break;
                   1008:
                   1009:        case PRU_DETACH:
1.31      mycroft  1010:                in_pcbdetach(inp);
1.1       cgd      1011:                break;
                   1012:
                   1013:        case PRU_BIND:
1.31      mycroft  1014:                error = in_pcbbind(inp, nam, p);
1.1       cgd      1015:                break;
                   1016:
                   1017:        case PRU_LISTEN:
                   1018:                error = EOPNOTSUPP;
                   1019:                break;
                   1020:
                   1021:        case PRU_CONNECT:
1.31      mycroft  1022:                error = in_pcbconnect(inp, nam);
                   1023:                if (error)
1.1       cgd      1024:                        break;
1.31      mycroft  1025:                soisconnected(so);
1.1       cgd      1026:                break;
                   1027:
                   1028:        case PRU_CONNECT2:
                   1029:                error = EOPNOTSUPP;
                   1030:                break;
                   1031:
                   1032:        case PRU_DISCONNECT:
1.31      mycroft  1033:                /*soisdisconnected(so);*/
                   1034:                so->so_state &= ~SS_ISCONNECTED;        /* XXX */
1.1       cgd      1035:                in_pcbdisconnect(inp);
1.34      mycroft  1036:                inp->inp_laddr = zeroin_addr;           /* XXX */
1.35      mycroft  1037:                in_pcbstate(inp, INP_BOUND);            /* XXX */
1.1       cgd      1038:                break;
                   1039:
                   1040:        case PRU_SHUTDOWN:
                   1041:                socantsendmore(so);
                   1042:                break;
                   1043:
1.31      mycroft  1044:        case PRU_RCVD:
                   1045:                error = EOPNOTSUPP;
1.1       cgd      1046:                break;
                   1047:
1.31      mycroft  1048:        case PRU_SEND:
1.32      mycroft  1049:                if (control && control->m_len) {
                   1050:                        m_freem(control);
                   1051:                        m_freem(m);
                   1052:                        error = EINVAL;
                   1053:                        break;
                   1054:                }
1.31      mycroft  1055:        {
1.35      mycroft  1056:                struct in_addr laddr;                   /* XXX */
1.1       cgd      1057:
1.31      mycroft  1058:                if (nam) {
1.35      mycroft  1059:                        laddr = inp->inp_laddr;         /* XXX */
1.31      mycroft  1060:                        if ((so->so_state & SS_ISCONNECTED) != 0) {
                   1061:                                error = EISCONN;
1.32      mycroft  1062:                                goto die;
1.31      mycroft  1063:                        }
                   1064:                        error = in_pcbconnect(inp, nam);
1.32      mycroft  1065:                        if (error) {
                   1066:                        die:
                   1067:                                m_freem(m);
1.31      mycroft  1068:                                break;
1.32      mycroft  1069:                        }
1.31      mycroft  1070:                } else {
                   1071:                        if ((so->so_state & SS_ISCONNECTED) == 0) {
                   1072:                                error = ENOTCONN;
1.32      mycroft  1073:                                goto die;
1.31      mycroft  1074:                        }
                   1075:                }
1.33      mycroft  1076:                error = udp_output(m, inp);
1.31      mycroft  1077:                if (nam) {
                   1078:                        in_pcbdisconnect(inp);
1.35      mycroft  1079:                        inp->inp_laddr = laddr;         /* XXX */
                   1080:                        in_pcbstate(inp, INP_BOUND);    /* XXX */
1.31      mycroft  1081:                }
                   1082:        }
1.1       cgd      1083:                break;
                   1084:
                   1085:        case PRU_SENSE:
                   1086:                /*
                   1087:                 * stat: don't bother with a blocksize.
                   1088:                 */
1.31      mycroft  1089:                splx(s);
1.1       cgd      1090:                return (0);
                   1091:
1.31      mycroft  1092:        case PRU_RCVOOB:
                   1093:                error =  EOPNOTSUPP;
                   1094:                break;
                   1095:
1.1       cgd      1096:        case PRU_SENDOOB:
1.32      mycroft  1097:                m_freem(control);
1.31      mycroft  1098:                m_freem(m);
1.1       cgd      1099:                error =  EOPNOTSUPP;
                   1100:                break;
                   1101:
1.31      mycroft  1102:        case PRU_SOCKADDR:
                   1103:                in_setsockaddr(inp, nam);
                   1104:                break;
                   1105:
                   1106:        case PRU_PEERADDR:
                   1107:                in_setpeeraddr(inp, nam);
                   1108:                break;
1.1       cgd      1109:
                   1110:        default:
                   1111:                panic("udp_usrreq");
                   1112:        }
                   1113:
                   1114: release:
1.31      mycroft  1115:        splx(s);
1.1       cgd      1116:        return (error);
1.13      mycroft  1117: }
                   1118:
                   1119: /*
                   1120:  * Sysctl for udp variables.
                   1121:  */
1.27      christos 1122: int
1.13      mycroft  1123: udp_sysctl(name, namelen, oldp, oldlenp, newp, newlen)
                   1124:        int *name;
                   1125:        u_int namelen;
                   1126:        void *oldp;
                   1127:        size_t *oldlenp;
                   1128:        void *newp;
                   1129:        size_t newlen;
                   1130: {
                   1131:        /* All sysctl names at this level are terminal. */
                   1132:        if (namelen != 1)
                   1133:                return (ENOTDIR);
                   1134:
                   1135:        switch (name[0]) {
                   1136:        case UDPCTL_CHECKSUM:
                   1137:                return (sysctl_int(oldp, oldlenp, newp, newlen, &udpcksum));
1.42      thorpej  1138:        case UDPCTL_SENDSPACE:
                   1139:                return (sysctl_int(oldp, oldlenp, newp, newlen,
                   1140:                    &udp_sendspace));
                   1141:        case UDPCTL_RECVSPACE:
1.75.2.7  nathanw  1142:                return (sysctl_int(oldp, oldlenp, newp, newlen,
1.42      thorpej  1143:                    &udp_recvspace));
1.13      mycroft  1144:        default:
                   1145:                return (ENOPROTOOPT);
                   1146:        }
                   1147:        /* NOTREACHED */
1.1       cgd      1148: }
1.72      itojun   1149: #endif

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