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Annotation of src/sys/netinet/udp_usrreq.c, Revision 1.75.2.6

1.75.2.6! nathanw     1: /*     $NetBSD: udp_usrreq.c,v 1.75.2.5 2001/11/14 19:17:59 nathanw Exp $      */
1.48      itojun      2:
                      3: /*
                      4:  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
                      5:  * All rights reserved.
                      6:  *
                      7:  * Redistribution and use in source and binary forms, with or without
                      8:  * modification, are permitted provided that the following conditions
                      9:  * are met:
                     10:  * 1. Redistributions of source code must retain the above copyright
                     11:  *    notice, this list of conditions and the following disclaimer.
                     12:  * 2. Redistributions in binary form must reproduce the above copyright
                     13:  *    notice, this list of conditions and the following disclaimer in the
                     14:  *    documentation and/or other materials provided with the distribution.
                     15:  * 3. Neither the name of the project nor the names of its contributors
                     16:  *    may be used to endorse or promote products derived from this software
                     17:  *    without specific prior written permission.
                     18:  *
                     19:  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
                     20:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     21:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     22:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
                     23:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     24:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     25:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     26:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     27:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     28:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     29:  * SUCH DAMAGE.
                     30:  */
1.14      cgd        31:
1.1       cgd        32: /*
1.44      thorpej    33:  * Copyright (c) 1982, 1986, 1988, 1990, 1993, 1995
1.13      mycroft    34:  *     The Regents of the University of California.  All rights reserved.
1.1       cgd        35:  *
                     36:  * Redistribution and use in source and binary forms, with or without
                     37:  * modification, are permitted provided that the following conditions
                     38:  * are met:
                     39:  * 1. Redistributions of source code must retain the above copyright
                     40:  *    notice, this list of conditions and the following disclaimer.
                     41:  * 2. Redistributions in binary form must reproduce the above copyright
                     42:  *    notice, this list of conditions and the following disclaimer in the
                     43:  *    documentation and/or other materials provided with the distribution.
                     44:  * 3. All advertising materials mentioning features or use of this software
                     45:  *    must display the following acknowledgement:
                     46:  *     This product includes software developed by the University of
                     47:  *     California, Berkeley and its contributors.
                     48:  * 4. Neither the name of the University nor the names of its contributors
                     49:  *    may be used to endorse or promote products derived from this software
                     50:  *    without specific prior written permission.
                     51:  *
                     52:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     53:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     54:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     55:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     56:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     57:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     58:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     59:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     60:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     61:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     62:  * SUCH DAMAGE.
                     63:  *
1.44      thorpej    64:  *     @(#)udp_usrreq.c        8.6 (Berkeley) 5/23/95
1.1       cgd        65:  */
1.50      thorpej    66:
1.75.2.5  nathanw    67: #include <sys/cdefs.h>
1.75.2.6! nathanw    68: __KERNEL_RCSID(0, "$NetBSD: udp_usrreq.c,v 1.75.2.5 2001/11/14 19:17:59 nathanw Exp $");
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:
1.72      itojun    142: #ifdef INET
1.53      itojun    143: static void udp4_sendup __P((struct mbuf *, int, struct sockaddr *,
                    144:        struct socket *));
                    145: static int udp4_realinput __P((struct sockaddr_in *, struct sockaddr_in *,
                    146:        struct mbuf *, int));
1.72      itojun    147: #endif
1.53      itojun    148: #ifdef INET6
                    149: static void udp6_sendup __P((struct mbuf *, int, struct sockaddr *,
                    150:        struct socket *));
                    151: static int udp6_realinput __P((int, struct sockaddr_in6 *,
                    152:        struct sockaddr_in6 *, struct mbuf *, int));
                    153: #endif
1.72      itojun    154: #ifdef INET
1.13      mycroft   155: static void udp_notify __P((struct inpcb *, int));
1.72      itojun    156: #endif
1.7       mycroft   157:
1.26      mycroft   158: #ifndef UDBHASHSIZE
                    159: #define        UDBHASHSIZE     128
                    160: #endif
                    161: int    udbhashsize = UDBHASHSIZE;
                    162:
1.75.2.1  nathanw   163: #ifdef UDP_CSUM_COUNTERS
                    164: #include <sys/device.h>
                    165:
                    166: struct evcnt udp_hwcsum_bad = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
                    167:     NULL, "udp", "hwcsum bad");
                    168: struct evcnt udp_hwcsum_ok = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
                    169:     NULL, "udp", "hwcsum ok");
                    170: struct evcnt udp_hwcsum_data = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
                    171:     NULL, "udp", "hwcsum data");
                    172: struct evcnt udp_swcsum = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
                    173:     NULL, "udp", "swcsum");
                    174:
                    175: #define        UDP_CSUM_COUNTER_INCR(ev)       (ev)->ev_count++
                    176:
                    177: #else
                    178:
                    179: #define        UDP_CSUM_COUNTER_INCR(ev)       /* nothing */
                    180:
                    181: #endif /* UDP_CSUM_COUNTERS */
                    182:
1.7       mycroft   183: void
1.1       cgd       184: udp_init()
                    185: {
1.18      mycroft   186:
1.72      itojun    187: #ifdef INET
1.35      mycroft   188:        in_pcbinit(&udbtable, udbhashsize, udbhashsize);
1.72      itojun    189: #endif
1.75.2.1  nathanw   190:
                    191: #ifdef UDP_CSUM_COUNTERS
                    192:        evcnt_attach_static(&udp_hwcsum_bad);
                    193:        evcnt_attach_static(&udp_hwcsum_ok);
                    194:        evcnt_attach_static(&udp_hwcsum_data);
                    195:        evcnt_attach_static(&udp_swcsum);
                    196: #endif /* UDP_CSUM_COUNTERS */
1.1       cgd       197: }
                    198:
1.72      itojun    199: #ifdef INET
1.7       mycroft   200: void
1.27      christos  201: #if __STDC__
                    202: udp_input(struct mbuf *m, ...)
                    203: #else
                    204: udp_input(m, va_alist)
                    205:        struct mbuf *m;
                    206:        va_dcl
                    207: #endif
1.1       cgd       208: {
1.53      itojun    209:        va_list ap;
                    210:        struct sockaddr_in src, dst;
                    211:        struct ip *ip;
                    212:        struct udphdr *uh;
                    213:        int iphlen, proto;
                    214:        int len;
                    215:        int n;
                    216:
                    217:        va_start(ap, m);
                    218:        iphlen = va_arg(ap, int);
                    219:        proto = va_arg(ap, int);
                    220:        va_end(ap);
                    221:
                    222:        udpstat.udps_ipackets++;
                    223:
                    224: #ifndef PULLDOWN_TEST
                    225:        /*
                    226:         * Strip IP options, if any; should skip this,
                    227:         * make available to user, and use on returned packets,
                    228:         * but we don't yet have a way to check the checksum
                    229:         * with options still present.
                    230:         */
                    231:        if (iphlen > sizeof (struct ip)) {
                    232:                ip_stripoptions(m, (struct mbuf *)0);
                    233:                iphlen = sizeof(struct ip);
                    234:        }
                    235: #else
                    236:        /*
                    237:         * we may enable the above code if we save and pass IPv4 options
                    238:         * to the userland.
                    239:         */
                    240: #endif
                    241:
                    242:        /*
                    243:         * Get IP and UDP header together in first mbuf.
                    244:         */
                    245:        ip = mtod(m, struct ip *);
                    246: #ifndef PULLDOWN_TEST
                    247:        if (m->m_len < iphlen + sizeof(struct udphdr)) {
                    248:                if ((m = m_pullup(m, iphlen + sizeof(struct udphdr))) == 0) {
                    249:                        udpstat.udps_hdrops++;
                    250:                        return;
                    251:                }
                    252:                ip = mtod(m, struct ip *);
                    253:        }
                    254:        uh = (struct udphdr *)((caddr_t)ip + iphlen);
                    255: #else
                    256:        IP6_EXTHDR_GET(uh, struct udphdr *, m, iphlen, sizeof(struct udphdr));
                    257:        if (uh == NULL) {
                    258:                udpstat.udps_hdrops++;
                    259:                return;
                    260:        }
                    261: #endif
                    262:
1.57      itojun    263:        /* destination port of 0 is illegal, based on RFC768. */
                    264:        if (uh->uh_dport == 0)
                    265:                goto bad;
                    266:
1.53      itojun    267:        /*
                    268:         * Make mbuf data length reflect UDP length.
                    269:         * If not enough data to reflect UDP length, drop.
                    270:         */
                    271:        len = ntohs((u_int16_t)uh->uh_ulen);
                    272:        if (ip->ip_len != iphlen + len) {
1.70      sommerfe  273:                if (ip->ip_len < iphlen + len || len < sizeof(struct udphdr)) {
1.53      itojun    274:                        udpstat.udps_badlen++;
                    275:                        goto bad;
                    276:                }
                    277:                m_adj(m, iphlen + len - ip->ip_len);
                    278:        }
                    279:
                    280:        /*
                    281:         * Checksum extended UDP header and data.
                    282:         */
                    283:        if (uh->uh_sum) {
1.75.2.1  nathanw   284:                switch (m->m_pkthdr.csum_flags &
1.75.2.3  nathanw   285:                        ((m->m_pkthdr.rcvif->if_csum_flags_rx & M_CSUM_UDPv4) |
1.75.2.1  nathanw   286:                         M_CSUM_TCP_UDP_BAD | M_CSUM_DATA)) {
                    287:                case M_CSUM_UDPv4|M_CSUM_TCP_UDP_BAD:
                    288:                        UDP_CSUM_COUNTER_INCR(&udp_hwcsum_bad);
                    289:                        goto badcsum;
                    290:
                    291:                case M_CSUM_UDPv4|M_CSUM_DATA:
                    292:                        UDP_CSUM_COUNTER_INCR(&udp_hwcsum_data);
                    293:                        if ((m->m_pkthdr.csum_data ^ 0xffff) != 0)
                    294:                                goto badcsum;
                    295:                        break;
                    296:
                    297:                case M_CSUM_UDPv4:
                    298:                        /* Checksum was okay. */
                    299:                        UDP_CSUM_COUNTER_INCR(&udp_hwcsum_ok);
                    300:                        break;
                    301:
                    302:                default:
                    303:                        /* Need to compute it ourselves. */
                    304:                        UDP_CSUM_COUNTER_INCR(&udp_swcsum);
                    305:                        if (in4_cksum(m, IPPROTO_UDP, iphlen, len) != 0)
                    306:                                goto badcsum;
                    307:                        break;
1.53      itojun    308:                }
                    309:        }
                    310:
                    311:        /* construct source and dst sockaddrs. */
                    312:        bzero(&src, sizeof(src));
                    313:        src.sin_family = AF_INET;
                    314:        src.sin_len = sizeof(struct sockaddr_in);
                    315:        bcopy(&ip->ip_src, &src.sin_addr, sizeof(src.sin_addr));
                    316:        src.sin_port = uh->uh_sport;
                    317:        bzero(&dst, sizeof(dst));
                    318:        dst.sin_family = AF_INET;
                    319:        dst.sin_len = sizeof(struct sockaddr_in);
                    320:        bcopy(&ip->ip_dst, &dst.sin_addr, sizeof(dst.sin_addr));
                    321:        dst.sin_port = uh->uh_dport;
                    322:
                    323:        n = udp4_realinput(&src, &dst, m, iphlen);
                    324: #ifdef INET6
                    325:        if (IN_MULTICAST(ip->ip_dst.s_addr) || n == 0) {
                    326:                struct sockaddr_in6 src6, dst6;
                    327:
                    328:                bzero(&src6, sizeof(src6));
                    329:                src6.sin6_family = AF_INET6;
                    330:                src6.sin6_len = sizeof(struct sockaddr_in6);
                    331:                src6.sin6_addr.s6_addr[10] = src6.sin6_addr.s6_addr[11] = 0xff;
                    332:                bcopy(&ip->ip_src, &src6.sin6_addr.s6_addr[12],
                    333:                        sizeof(ip->ip_src));
                    334:                src6.sin6_port = uh->uh_sport;
                    335:                bzero(&dst6, sizeof(dst6));
                    336:                dst6.sin6_family = AF_INET6;
                    337:                dst6.sin6_len = sizeof(struct sockaddr_in6);
                    338:                dst6.sin6_addr.s6_addr[10] = dst6.sin6_addr.s6_addr[11] = 0xff;
                    339:                bcopy(&ip->ip_dst, &dst6.sin6_addr.s6_addr[12],
                    340:                        sizeof(ip->ip_dst));
                    341:                dst6.sin6_port = uh->uh_dport;
                    342:
                    343:                n += udp6_realinput(AF_INET, &src6, &dst6, m, iphlen);
                    344:        }
                    345: #endif
                    346:
                    347:        if (n == 0) {
                    348:                if (m->m_flags & (M_BCAST | M_MCAST)) {
                    349:                        udpstat.udps_noportbcast++;
                    350:                        goto bad;
                    351:                }
1.61      itojun    352:                udpstat.udps_noport++;
1.64      ws        353: #ifdef IPKDB
1.53      itojun    354:                if (checkipkdb(&ip->ip_src, uh->uh_sport, uh->uh_dport,
                    355:                                m, iphlen + sizeof(struct udphdr),
                    356:                                m->m_pkthdr.len - iphlen - sizeof(struct udphdr))) {
                    357:                        /*
                    358:                         * It was a debugger connect packet,
                    359:                         * just drop it now
                    360:                         */
                    361:                        goto bad;
                    362:                }
                    363: #endif
                    364:                icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0);
                    365:                m = NULL;
                    366:        }
                    367:
                    368: bad:
                    369:        if (m)
                    370:                m_freem(m);
1.75.2.1  nathanw   371:        return;
                    372:
                    373: badcsum:
                    374:        m_freem(m);
                    375:        udpstat.udps_badsum++;
1.53      itojun    376: }
1.72      itojun    377: #endif
1.53      itojun    378:
                    379: #ifdef INET6
                    380: int
                    381: udp6_input(mp, offp, proto)
                    382:        struct mbuf **mp;
                    383:        int *offp, proto;
                    384: {
                    385:        struct mbuf *m = *mp;
                    386:        int off = *offp;
                    387:        struct sockaddr_in6 src, dst;
                    388:        struct ip6_hdr *ip6;
                    389:        struct udphdr *uh;
                    390:        u_int32_t plen, ulen;
                    391:
1.75.2.1  nathanw   392: #ifndef PULLDOWN_TEST
                    393:        IP6_EXTHDR_CHECK(m, off, sizeof(struct udphdr), IPPROTO_DONE);
                    394: #endif
                    395:        ip6 = mtod(m, struct ip6_hdr *);
                    396:
1.53      itojun    397: #if defined(NFAITH) && 0 < NFAITH
1.75.2.1  nathanw   398:        if (faithprefix(&ip6->ip6_dst)) {
                    399:                /* send icmp6 host unreach? */
                    400:                m_freem(m);
                    401:                return IPPROTO_DONE;
1.53      itojun    402:        }
                    403: #endif
                    404:
                    405:        udp6stat.udp6s_ipackets++;
                    406:
                    407:        /* check for jumbogram is done in ip6_input.  we can trust pkthdr.len */
                    408:        plen = m->m_pkthdr.len - off;
                    409: #ifndef PULLDOWN_TEST
                    410:        uh = (struct udphdr *)((caddr_t)ip6 + off);
                    411: #else
                    412:        IP6_EXTHDR_GET(uh, struct udphdr *, m, off, sizeof(struct udphdr));
                    413:        if (uh == NULL) {
                    414:                ip6stat.ip6s_tooshort++;
                    415:                return IPPROTO_DONE;
                    416:        }
                    417: #endif
                    418:        ulen = ntohs((u_short)uh->uh_ulen);
1.69      itojun    419:        /*
                    420:         * RFC2675 section 4: jumbograms will have 0 in the UDP header field,
                    421:         * iff payload length > 0xffff.
                    422:         */
1.53      itojun    423:        if (ulen == 0 && plen > 0xffff)
                    424:                ulen = plen;
                    425:
                    426:        if (plen != ulen) {
                    427:                udp6stat.udp6s_badlen++;
1.54      itojun    428:                goto bad;
                    429:        }
                    430:
1.57      itojun    431:        /* destination port of 0 is illegal, based on RFC768. */
                    432:        if (uh->uh_dport == 0)
                    433:                goto bad;
                    434:
1.54      itojun    435:        /* Be proactive about malicious use of IPv4 mapped address */
                    436:        if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
                    437:            IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
                    438:                /* XXX stat */
1.53      itojun    439:                goto bad;
                    440:        }
                    441:
                    442:        /*
                    443:         * Checksum extended UDP header and data.
                    444:         */
                    445:        if (uh->uh_sum == 0)
                    446:                udp6stat.udp6s_nosum++;
                    447:        else if (in6_cksum(m, IPPROTO_UDP, off, ulen) != 0) {
                    448:                udp6stat.udp6s_badsum++;
                    449:                goto bad;
                    450:        }
                    451:
                    452:        /*
                    453:         * Construct source and dst sockaddrs.
                    454:         * Note that ifindex (s6_addr16[1]) is already filled.
                    455:         */
                    456:        bzero(&src, sizeof(src));
                    457:        src.sin6_family = AF_INET6;
                    458:        src.sin6_len = sizeof(struct sockaddr_in6);
1.69      itojun    459:        /* KAME hack: recover scopeid */
                    460:        (void)in6_recoverscope(&src, &ip6->ip6_src, m->m_pkthdr.rcvif);
1.53      itojun    461:        src.sin6_port = uh->uh_sport;
                    462:        bzero(&dst, sizeof(dst));
                    463:        dst.sin6_family = AF_INET6;
                    464:        dst.sin6_len = sizeof(struct sockaddr_in6);
1.69      itojun    465:        /* KAME hack: recover scopeid */
                    466:        (void)in6_recoverscope(&dst, &ip6->ip6_dst, m->m_pkthdr.rcvif);
1.53      itojun    467:        dst.sin6_port = uh->uh_dport;
                    468:
                    469:        if (udp6_realinput(AF_INET6, &src, &dst, m, off) == 0) {
                    470:                if (m->m_flags & M_MCAST) {
                    471:                        udp6stat.udp6s_noportmcast++;
                    472:                        goto bad;
                    473:                }
1.61      itojun    474:                udp6stat.udp6s_noport++;
1.53      itojun    475:                icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0);
                    476:                m = NULL;
                    477:        }
                    478:
                    479: bad:
                    480:        if (m)
                    481:                m_freem(m);
                    482:        return IPPROTO_DONE;
                    483: }
                    484: #endif
                    485:
1.72      itojun    486: #ifdef INET
1.53      itojun    487: static void
                    488: udp4_sendup(m, off, src, so)
                    489:        struct mbuf *m;
                    490:        int off;        /* offset of data portion */
                    491:        struct sockaddr *src;
                    492:        struct socket *so;
                    493: {
                    494:        struct mbuf *opts = NULL;
                    495:        struct mbuf *n;
                    496:        struct inpcb *inp = NULL;
                    497: #ifdef INET6
                    498:        struct in6pcb *in6p = NULL;
                    499: #endif
                    500:
                    501:        if (!so)
                    502:                return;
                    503:        switch (so->so_proto->pr_domain->dom_family) {
                    504:        case AF_INET:
                    505:                inp = sotoinpcb(so);
                    506:                break;
                    507: #ifdef INET6
                    508:        case AF_INET6:
                    509:                in6p = sotoin6pcb(so);
                    510:                break;
                    511: #endif
                    512:        default:
                    513:                return;
                    514:        }
                    515:
                    516: #ifdef IPSEC
                    517:        /* check AH/ESP integrity. */
                    518:        if (so != NULL && ipsec4_in_reject_so(m, so)) {
                    519:                ipsecstat.in_polvio++;
                    520:                return;
                    521:        }
                    522: #endif /*IPSEC*/
                    523:
                    524:        if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
                    525:                if (inp && (inp->inp_flags & INP_CONTROLOPTS
                    526:                         || so->so_options & SO_TIMESTAMP)) {
                    527:                        struct ip *ip = mtod(n, struct ip *);
                    528:                        ip_savecontrol(inp, &opts, ip, n);
                    529:                }
                    530:
                    531:                m_adj(n, off);
                    532:                if (sbappendaddr(&so->so_rcv, src, n,
                    533:                                opts) == 0) {
                    534:                        m_freem(n);
                    535:                        if (opts)
                    536:                                m_freem(opts);
1.75.2.2  nathanw   537:                        udpstat.udps_fullsock++;
1.53      itojun    538:                } else
                    539:                        sorwakeup(so);
                    540:        }
                    541: }
1.72      itojun    542: #endif
1.53      itojun    543:
                    544: #ifdef INET6
                    545: static void
                    546: udp6_sendup(m, off, src, so)
                    547:        struct mbuf *m;
                    548:        int off;        /* offset of data portion */
                    549:        struct sockaddr *src;
                    550:        struct socket *so;
                    551: {
                    552:        struct mbuf *opts = NULL;
                    553:        struct mbuf *n;
                    554:        struct in6pcb *in6p = NULL;
                    555:
                    556:        if (!so)
                    557:                return;
                    558:        if (so->so_proto->pr_domain->dom_family != AF_INET6)
                    559:                return;
                    560:        in6p = sotoin6pcb(so);
                    561:
                    562: #ifdef IPSEC
                    563:        /* check AH/ESP integrity. */
                    564:        if (so != NULL && ipsec6_in_reject_so(m, so)) {
                    565:                ipsec6stat.in_polvio++;
                    566:                return;
                    567:        }
                    568: #endif /*IPSEC*/
                    569:
                    570:        if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
                    571:                if (in6p && (in6p->in6p_flags & IN6P_CONTROLOPTS
                    572:                          || in6p->in6p_socket->so_options & SO_TIMESTAMP)) {
                    573:                        struct ip6_hdr *ip6 = mtod(n, struct ip6_hdr *);
                    574:                        ip6_savecontrol(in6p, &opts, ip6, n);
                    575:                }
                    576:
                    577:                m_adj(n, off);
                    578:                if (sbappendaddr(&so->so_rcv, src, n, opts) == 0) {
                    579:                        m_freem(n);
                    580:                        if (opts)
                    581:                                m_freem(opts);
                    582:                        udp6stat.udp6s_fullsock++;
                    583:                } else
                    584:                        sorwakeup(so);
                    585:        }
                    586: }
                    587: #endif
                    588:
1.72      itojun    589: #ifdef INET
1.53      itojun    590: static int
                    591: udp4_realinput(src, dst, m, off)
                    592:        struct sockaddr_in *src;
                    593:        struct sockaddr_in *dst;
                    594:        struct mbuf *m;
                    595:        int off;        /* offset of udphdr */
                    596: {
                    597:        u_int16_t *sport, *dport;
                    598:        int rcvcnt;
                    599:        struct in_addr *src4, *dst4;
                    600:        struct inpcb *inp;
                    601:
                    602:        rcvcnt = 0;
                    603:        off += sizeof(struct udphdr);   /* now, offset of payload */
                    604:
                    605:        if (src->sin_family != AF_INET || dst->sin_family != AF_INET)
                    606:                goto bad;
                    607:
                    608:        src4 = &src->sin_addr;
                    609:        sport = &src->sin_port;
                    610:        dst4 = &dst->sin_addr;
                    611:        dport = &dst->sin_port;
                    612:
1.73      itojun    613:        if (IN_MULTICAST(dst4->s_addr) ||
1.53      itojun    614:            in_broadcast(*dst4, m->m_pkthdr.rcvif)) {
                    615:                struct inpcb *last;
                    616:                /*
                    617:                 * Deliver a multicast or broadcast datagram to *all* sockets
                    618:                 * for which the local and remote addresses and ports match
                    619:                 * those of the incoming datagram.  This allows more than
                    620:                 * one process to receive multi/broadcasts on the same port.
                    621:                 * (This really ought to be done for unicast datagrams as
                    622:                 * well, but that would cause problems with existing
                    623:                 * applications that open both address-specific sockets and
                    624:                 * a wildcard socket listening to the same port -- they would
                    625:                 * end up receiving duplicates of every unicast datagram.
                    626:                 * Those applications open the multiple sockets to overcome an
                    627:                 * inadequacy of the UDP socket interface, but for backwards
                    628:                 * compatibility we avoid the problem here rather than
                    629:                 * fixing the interface.  Maybe 4.5BSD will remedy this?)
                    630:                 */
                    631:
                    632:                /*
1.75.2.6! nathanw   633:                 * KAME note: traditionally we dropped udpiphdr from mbuf here.
1.71      itojun    634:                 * we need udpiphdr for IPsec processing so we do that later.
1.53      itojun    635:                 */
                    636:                /*
                    637:                 * Locate pcb(s) for datagram.
                    638:                 */
1.75.2.5  nathanw   639:                CIRCLEQ_FOREACH(inp, &udbtable.inpt_queue, inp_queue) {
1.53      itojun    640:                        if (inp->inp_lport != *dport)
                    641:                                continue;
                    642:                        if (!in_nullhost(inp->inp_laddr)) {
                    643:                                if (!in_hosteq(inp->inp_laddr, *dst4))
                    644:                                        continue;
                    645:                        }
                    646:                        if (!in_nullhost(inp->inp_faddr)) {
                    647:                                if (!in_hosteq(inp->inp_faddr, *src4) ||
                    648:                                    inp->inp_fport != *sport)
                    649:                                        continue;
                    650:                        }
                    651:
                    652:                        last = inp;
                    653:                        udp4_sendup(m, off, (struct sockaddr *)src,
                    654:                                inp->inp_socket);
                    655:                        rcvcnt++;
                    656:
                    657:                        /*
                    658:                         * Don't look for additional matches if this one does
                    659:                         * not have either the SO_REUSEPORT or SO_REUSEADDR
                    660:                         * socket options set.  This heuristic avoids searching
                    661:                         * through all pcbs in the common case of a non-shared
                    662:                         * port.  It assumes that an application will never
                    663:                         * clear these options after setting them.
                    664:                         */
                    665:                        if ((inp->inp_socket->so_options &
                    666:                            (SO_REUSEPORT|SO_REUSEADDR)) == 0)
                    667:                                break;
                    668:                }
                    669:        } else {
                    670:                /*
                    671:                 * Locate pcb for datagram.
                    672:                 */
                    673:                inp = in_pcblookup_connect(&udbtable, *src4, *sport, *dst4, *dport);
                    674:                if (inp == 0) {
                    675:                        ++udpstat.udps_pcbhashmiss;
                    676:                        inp = in_pcblookup_bind(&udbtable, *dst4, *dport);
1.75.2.2  nathanw   677:                        if (inp == 0)
1.53      itojun    678:                                return rcvcnt;
                    679:                }
                    680:
                    681:                udp4_sendup(m, off, (struct sockaddr *)src, inp->inp_socket);
                    682:                rcvcnt++;
                    683:        }
                    684:
                    685: bad:
                    686:        return rcvcnt;
                    687: }
1.72      itojun    688: #endif
1.53      itojun    689:
                    690: #ifdef INET6
                    691: static int
                    692: udp6_realinput(af, src, dst, m, off)
                    693:        int af;         /* af on packet */
                    694:        struct sockaddr_in6 *src;
                    695:        struct sockaddr_in6 *dst;
                    696:        struct mbuf *m;
                    697:        int off;        /* offset of udphdr */
                    698: {
1.75.2.2  nathanw   699:        u_int16_t sport, dport;
1.53      itojun    700:        int rcvcnt;
1.75.2.2  nathanw   701:        struct in6_addr src6, dst6;
                    702:        const struct in_addr *dst4;
1.53      itojun    703:        struct in6pcb *in6p;
                    704:
                    705:        rcvcnt = 0;
                    706:        off += sizeof(struct udphdr);   /* now, offset of payload */
                    707:
                    708:        if (af != AF_INET && af != AF_INET6)
                    709:                goto bad;
                    710:        if (src->sin6_family != AF_INET6 || dst->sin6_family != AF_INET6)
                    711:                goto bad;
                    712:
1.75.2.2  nathanw   713:        in6_embedscope(&src6, src, NULL, NULL);
                    714:        sport = src->sin6_port;
                    715:        in6_embedscope(&dst6, dst, NULL, NULL);
                    716:        dport = dst->sin6_port;
1.75.2.5  nathanw   717:        dst4 = (struct in_addr *)&dst->sin6_addr.s6_addr[12];
1.53      itojun    718:
1.75.2.2  nathanw   719:        if (IN6_IS_ADDR_MULTICAST(&dst6) ||
                    720:            (af == AF_INET && IN_MULTICAST(dst4->s_addr))) {
1.53      itojun    721:                struct in6pcb *last;
                    722:                /*
                    723:                 * Deliver a multicast or broadcast datagram to *all* sockets
                    724:                 * for which the local and remote addresses and ports match
                    725:                 * those of the incoming datagram.  This allows more than
                    726:                 * one process to receive multi/broadcasts on the same port.
                    727:                 * (This really ought to be done for unicast datagrams as
                    728:                 * well, but that would cause problems with existing
                    729:                 * applications that open both address-specific sockets and
                    730:                 * a wildcard socket listening to the same port -- they would
                    731:                 * end up receiving duplicates of every unicast datagram.
                    732:                 * Those applications open the multiple sockets to overcome an
                    733:                 * inadequacy of the UDP socket interface, but for backwards
                    734:                 * compatibility we avoid the problem here rather than
                    735:                 * fixing the interface.  Maybe 4.5BSD will remedy this?)
                    736:                 */
                    737:
                    738:                /*
1.75.2.6! nathanw   739:                 * KAME note: traditionally we dropped udpiphdr from mbuf here.
1.71      itojun    740:                 * we need udpiphdr for IPsec processing so we do that later.
1.53      itojun    741:                 */
                    742:                /*
                    743:                 * Locate pcb(s) for datagram.
                    744:                 */
                    745:                for (in6p = udb6.in6p_next; in6p != &udb6;
                    746:                     in6p = in6p->in6p_next) {
1.75.2.2  nathanw   747:                        if (in6p->in6p_lport != dport)
1.53      itojun    748:                                continue;
                    749:                        if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) {
1.75.2.5  nathanw   750:                                if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &dst6))
1.53      itojun    751:                                        continue;
1.75.2.6! nathanw   752:                        } else {
1.75.2.2  nathanw   753:                                if (IN6_IS_ADDR_V4MAPPED(&dst6) &&
1.75.2.4  nathanw   754:                                    (in6p->in6p_flags & IN6P_IPV6_V6ONLY))
1.55      itojun    755:                                        continue;
                    756:                        }
1.53      itojun    757:                        if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
1.75.2.2  nathanw   758:                                if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr,
                    759:                                    &src6) || in6p->in6p_fport != sport)
1.53      itojun    760:                                        continue;
1.75.2.6! nathanw   761:                        } else {
1.75.2.2  nathanw   762:                                if (IN6_IS_ADDR_V4MAPPED(&src6) &&
1.75.2.4  nathanw   763:                                    (in6p->in6p_flags & IN6P_IPV6_V6ONLY))
1.55      itojun    764:                                        continue;
                    765:                        }
1.53      itojun    766:
                    767:                        last = in6p;
                    768:                        udp6_sendup(m, off, (struct sockaddr *)src,
                    769:                                in6p->in6p_socket);
                    770:                        rcvcnt++;
                    771:
                    772:                        /*
                    773:                         * Don't look for additional matches if this one does
                    774:                         * not have either the SO_REUSEPORT or SO_REUSEADDR
                    775:                         * socket options set.  This heuristic avoids searching
                    776:                         * through all pcbs in the common case of a non-shared
                    777:                         * port.  It assumes that an application will never
                    778:                         * clear these options after setting them.
                    779:                         */
                    780:                        if ((in6p->in6p_socket->so_options &
                    781:                            (SO_REUSEPORT|SO_REUSEADDR)) == 0)
                    782:                                break;
                    783:                }
                    784:        } else {
                    785:                /*
                    786:                 * Locate pcb for datagram.
                    787:                 */
1.75.2.2  nathanw   788:                in6p = in6_pcblookup_connect(&udb6, &src6, sport,
                    789:                    &dst6, dport, 0);
1.53      itojun    790:                if (in6p == 0) {
                    791:                        ++udpstat.udps_pcbhashmiss;
1.75.2.2  nathanw   792:                        in6p = in6_pcblookup_bind(&udb6, &dst6, dport, 0);
                    793:                        if (in6p == 0)
1.53      itojun    794:                                return rcvcnt;
                    795:                }
                    796:
                    797:                udp6_sendup(m, off, (struct sockaddr *)src, in6p->in6p_socket);
                    798:                rcvcnt++;
                    799:        }
                    800:
                    801: bad:
                    802:        return rcvcnt;
                    803: }
                    804: #endif
1.1       cgd       805:
1.72      itojun    806: #ifdef INET
1.1       cgd       807: /*
                    808:  * Notify a udp user of an asynchronous error;
                    809:  * just wake up so that he can collect error status.
                    810:  */
1.7       mycroft   811: static void
1.1       cgd       812: udp_notify(inp, errno)
1.66      augustss  813:        struct inpcb *inp;
1.7       mycroft   814:        int errno;
1.1       cgd       815: {
1.34      mycroft   816:
1.1       cgd       817:        inp->inp_socket->so_error = errno;
                    818:        sorwakeup(inp->inp_socket);
                    819:        sowwakeup(inp->inp_socket);
                    820: }
                    821:
1.27      christos  822: void *
                    823: udp_ctlinput(cmd, sa, v)
1.1       cgd       824:        int cmd;
                    825:        struct sockaddr *sa;
1.27      christos  826:        void *v;
1.1       cgd       827: {
1.66      augustss  828:        struct ip *ip = v;
                    829:        struct udphdr *uh;
1.18      mycroft   830:        void (*notify) __P((struct inpcb *, int)) = udp_notify;
1.21      mycroft   831:        int errno;
1.1       cgd       832:
1.53      itojun    833:        if (sa->sa_family != AF_INET
                    834:         || sa->sa_len != sizeof(struct sockaddr_in))
1.51      itojun    835:                return NULL;
1.20      mycroft   836:        if ((unsigned)cmd >= PRC_NCMDS)
1.27      christos  837:                return NULL;
1.20      mycroft   838:        errno = inetctlerrmap[cmd];
1.18      mycroft   839:        if (PRC_IS_REDIRECT(cmd))
1.19      mycroft   840:                notify = in_rtchange, ip = 0;
1.18      mycroft   841:        else if (cmd == PRC_HOSTDEAD)
1.19      mycroft   842:                ip = 0;
1.23      cgd       843:        else if (errno == 0)
1.27      christos  844:                return NULL;
1.19      mycroft   845:        if (ip) {
1.1       cgd       846:                uh = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2));
1.34      mycroft   847:                in_pcbnotify(&udbtable, satosin(sa)->sin_addr, uh->uh_dport,
                    848:                    ip->ip_src, uh->uh_sport, errno, notify);
1.53      itojun    849:
                    850:                /* XXX mapped address case */
1.19      mycroft   851:        } else
1.34      mycroft   852:                in_pcbnotifyall(&udbtable, satosin(sa)->sin_addr, errno,
                    853:                    notify);
1.27      christos  854:        return NULL;
1.1       cgd       855: }
                    856:
1.7       mycroft   857: int
1.27      christos  858: #if __STDC__
                    859: udp_output(struct mbuf *m, ...)
                    860: #else
                    861: udp_output(m, va_alist)
                    862:        struct mbuf *m;
                    863:        va_dcl
                    864: #endif
                    865: {
1.66      augustss  866:        struct inpcb *inp;
                    867:        struct udpiphdr *ui;
                    868:        int len = m->m_pkthdr.len;
1.31      mycroft   869:        int error = 0;
1.27      christos  870:        va_list ap;
                    871:
                    872:        va_start(ap, m);
                    873:        inp = va_arg(ap, struct inpcb *);
                    874:        va_end(ap);
1.1       cgd       875:
                    876:        /*
                    877:         * Calculate data length and get a mbuf
                    878:         * for UDP and IP headers.
                    879:         */
1.13      mycroft   880:        M_PREPEND(m, sizeof(struct udpiphdr), M_DONTWAIT);
                    881:        if (m == 0) {
                    882:                error = ENOBUFS;
1.39      thorpej   883:                goto release;
                    884:        }
                    885:
                    886:        /*
                    887:         * Compute the packet length of the IP header, and
                    888:         * punt if the length looks bogus.
                    889:         */
                    890:        if ((len + sizeof(struct udpiphdr)) > IP_MAXPACKET) {
                    891:                error = EMSGSIZE;
1.13      mycroft   892:                goto release;
                    893:        }
1.1       cgd       894:
                    895:        /*
                    896:         * Fill in mbuf with extended UDP header
                    897:         * and addresses and length put into network format.
                    898:         */
                    899:        ui = mtod(m, struct udpiphdr *);
                    900:        ui->ui_pr = IPPROTO_UDP;
                    901:        ui->ui_src = inp->inp_laddr;
                    902:        ui->ui_dst = inp->inp_faddr;
                    903:        ui->ui_sport = inp->inp_lport;
                    904:        ui->ui_dport = inp->inp_fport;
1.75.2.1  nathanw   905:        ui->ui_ulen = htons((u_int16_t)len + sizeof(struct udphdr));
1.1       cgd       906:
                    907:        /*
1.75.2.1  nathanw   908:         * Set up checksum and output datagram.
1.1       cgd       909:         */
                    910:        if (udpcksum) {
1.75.2.1  nathanw   911:                /*
                    912:                 * XXX Cache pseudo-header checksum part for
                    913:                 * XXX "connected" UDP sockets.
                    914:                 */
                    915:                ui->ui_sum = in_cksum_phdr(ui->ui_src.s_addr,
                    916:                    ui->ui_dst.s_addr, htons((u_int16_t)len +
                    917:                    sizeof(struct udphdr) + IPPROTO_UDP));
                    918:                m->m_pkthdr.csum_flags = M_CSUM_UDPv4;
                    919:                m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum);
                    920:        } else
                    921:                ui->ui_sum = 0;
1.1       cgd       922:        ((struct ip *)ui)->ip_len = sizeof (struct udpiphdr) + len;
                    923:        ((struct ip *)ui)->ip_ttl = inp->inp_ip.ip_ttl; /* XXX */
                    924:        ((struct ip *)ui)->ip_tos = inp->inp_ip.ip_tos; /* XXX */
                    925:        udpstat.udps_opackets++;
1.48      itojun    926:
                    927: #ifdef IPSEC
1.75      itojun    928:        if (ipsec_setsocket(m, inp->inp_socket) != 0) {
                    929:                error = ENOBUFS;
                    930:                goto release;
                    931:        }
1.48      itojun    932: #endif /*IPSEC*/
                    933:
1.31      mycroft   934:        return (ip_output(m, inp->inp_options, &inp->inp_route,
1.12      mycroft   935:            inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST),
1.31      mycroft   936:            inp->inp_moptions));
1.1       cgd       937:
                    938: release:
                    939:        m_freem(m);
                    940:        return (error);
                    941: }
                    942:
1.42      thorpej   943: int    udp_sendspace = 9216;           /* really max datagram size */
                    944: int    udp_recvspace = 40 * (1024 + sizeof(struct sockaddr_in));
1.1       cgd       945:                                        /* 40 1K datagrams */
                    946:
                    947: /*ARGSUSED*/
1.7       mycroft   948: int
1.31      mycroft   949: udp_usrreq(so, req, m, nam, control, p)
1.1       cgd       950:        struct socket *so;
                    951:        int req;
1.31      mycroft   952:        struct mbuf *m, *nam, *control;
1.30      mycroft   953:        struct proc *p;
1.1       cgd       954: {
1.66      augustss  955:        struct inpcb *inp;
1.1       cgd       956:        int s;
1.66      augustss  957:        int error = 0;
1.1       cgd       958:
                    959:        if (req == PRU_CONTROL)
1.31      mycroft   960:                return (in_control(so, (long)m, (caddr_t)nam,
1.30      mycroft   961:                    (struct ifnet *)control, p));
1.59      thorpej   962:
1.60      thorpej   963:        if (req == PRU_PURGEIF) {
1.75.2.2  nathanw   964:                in_pcbpurgeif0(&udbtable, (struct ifnet *)control);
1.60      thorpej   965:                in_purgeif((struct ifnet *)control);
                    966:                in_pcbpurgeif(&udbtable, (struct ifnet *)control);
1.59      thorpej   967:                return (0);
                    968:        }
1.31      mycroft   969:
                    970:        s = splsoftnet();
                    971:        inp = sotoinpcb(so);
1.32      mycroft   972: #ifdef DIAGNOSTIC
                    973:        if (req != PRU_SEND && req != PRU_SENDOOB && control)
                    974:                panic("udp_usrreq: unexpected control mbuf");
                    975: #endif
1.31      mycroft   976:        if (inp == 0 && req != PRU_ATTACH) {
                    977:                error = EINVAL;
                    978:                goto release;
                    979:        }
                    980:
1.1       cgd       981:        /*
                    982:         * Note: need to block udp_input while changing
                    983:         * the udp pcb queue and/or pcb addresses.
                    984:         */
                    985:        switch (req) {
                    986:
                    987:        case PRU_ATTACH:
1.31      mycroft   988:                if (inp != 0) {
                    989:                        error = EISCONN;
1.1       cgd       990:                        break;
                    991:                }
1.31      mycroft   992:                if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
                    993:                        error = soreserve(so, udp_sendspace, udp_recvspace);
                    994:                        if (error)
                    995:                                break;
                    996:                }
1.18      mycroft   997:                error = in_pcballoc(so, &udbtable);
1.1       cgd       998:                if (error)
                    999:                        break;
1.31      mycroft  1000:                inp = sotoinpcb(so);
                   1001:                inp->inp_ip.ip_ttl = ip_defttl;
1.1       cgd      1002:                break;
                   1003:
                   1004:        case PRU_DETACH:
1.31      mycroft  1005:                in_pcbdetach(inp);
1.1       cgd      1006:                break;
                   1007:
                   1008:        case PRU_BIND:
1.31      mycroft  1009:                error = in_pcbbind(inp, nam, p);
1.1       cgd      1010:                break;
                   1011:
                   1012:        case PRU_LISTEN:
                   1013:                error = EOPNOTSUPP;
                   1014:                break;
                   1015:
                   1016:        case PRU_CONNECT:
1.31      mycroft  1017:                error = in_pcbconnect(inp, nam);
                   1018:                if (error)
1.1       cgd      1019:                        break;
1.31      mycroft  1020:                soisconnected(so);
1.1       cgd      1021:                break;
                   1022:
                   1023:        case PRU_CONNECT2:
                   1024:                error = EOPNOTSUPP;
                   1025:                break;
                   1026:
                   1027:        case PRU_DISCONNECT:
1.31      mycroft  1028:                /*soisdisconnected(so);*/
                   1029:                so->so_state &= ~SS_ISCONNECTED;        /* XXX */
1.1       cgd      1030:                in_pcbdisconnect(inp);
1.34      mycroft  1031:                inp->inp_laddr = zeroin_addr;           /* XXX */
1.35      mycroft  1032:                in_pcbstate(inp, INP_BOUND);            /* XXX */
1.1       cgd      1033:                break;
                   1034:
                   1035:        case PRU_SHUTDOWN:
                   1036:                socantsendmore(so);
                   1037:                break;
                   1038:
1.31      mycroft  1039:        case PRU_RCVD:
                   1040:                error = EOPNOTSUPP;
1.1       cgd      1041:                break;
                   1042:
1.31      mycroft  1043:        case PRU_SEND:
1.32      mycroft  1044:                if (control && control->m_len) {
                   1045:                        m_freem(control);
                   1046:                        m_freem(m);
                   1047:                        error = EINVAL;
                   1048:                        break;
                   1049:                }
1.31      mycroft  1050:        {
1.35      mycroft  1051:                struct in_addr laddr;                   /* XXX */
1.1       cgd      1052:
1.31      mycroft  1053:                if (nam) {
1.35      mycroft  1054:                        laddr = inp->inp_laddr;         /* XXX */
1.31      mycroft  1055:                        if ((so->so_state & SS_ISCONNECTED) != 0) {
                   1056:                                error = EISCONN;
1.32      mycroft  1057:                                goto die;
1.31      mycroft  1058:                        }
                   1059:                        error = in_pcbconnect(inp, nam);
1.32      mycroft  1060:                        if (error) {
                   1061:                        die:
                   1062:                                m_freem(m);
1.31      mycroft  1063:                                break;
1.32      mycroft  1064:                        }
1.31      mycroft  1065:                } else {
                   1066:                        if ((so->so_state & SS_ISCONNECTED) == 0) {
                   1067:                                error = ENOTCONN;
1.32      mycroft  1068:                                goto die;
1.31      mycroft  1069:                        }
                   1070:                }
1.33      mycroft  1071:                error = udp_output(m, inp);
1.31      mycroft  1072:                if (nam) {
                   1073:                        in_pcbdisconnect(inp);
1.35      mycroft  1074:                        inp->inp_laddr = laddr;         /* XXX */
                   1075:                        in_pcbstate(inp, INP_BOUND);    /* XXX */
1.31      mycroft  1076:                }
                   1077:        }
1.1       cgd      1078:                break;
                   1079:
                   1080:        case PRU_SENSE:
                   1081:                /*
                   1082:                 * stat: don't bother with a blocksize.
                   1083:                 */
1.31      mycroft  1084:                splx(s);
1.1       cgd      1085:                return (0);
                   1086:
1.31      mycroft  1087:        case PRU_RCVOOB:
                   1088:                error =  EOPNOTSUPP;
                   1089:                break;
                   1090:
1.1       cgd      1091:        case PRU_SENDOOB:
1.32      mycroft  1092:                m_freem(control);
1.31      mycroft  1093:                m_freem(m);
1.1       cgd      1094:                error =  EOPNOTSUPP;
                   1095:                break;
                   1096:
1.31      mycroft  1097:        case PRU_SOCKADDR:
                   1098:                in_setsockaddr(inp, nam);
                   1099:                break;
                   1100:
                   1101:        case PRU_PEERADDR:
                   1102:                in_setpeeraddr(inp, nam);
                   1103:                break;
1.1       cgd      1104:
                   1105:        default:
                   1106:                panic("udp_usrreq");
                   1107:        }
                   1108:
                   1109: release:
1.31      mycroft  1110:        splx(s);
1.1       cgd      1111:        return (error);
1.13      mycroft  1112: }
                   1113:
                   1114: /*
                   1115:  * Sysctl for udp variables.
                   1116:  */
1.27      christos 1117: int
1.13      mycroft  1118: udp_sysctl(name, namelen, oldp, oldlenp, newp, newlen)
                   1119:        int *name;
                   1120:        u_int namelen;
                   1121:        void *oldp;
                   1122:        size_t *oldlenp;
                   1123:        void *newp;
                   1124:        size_t newlen;
                   1125: {
                   1126:        /* All sysctl names at this level are terminal. */
                   1127:        if (namelen != 1)
                   1128:                return (ENOTDIR);
                   1129:
                   1130:        switch (name[0]) {
                   1131:        case UDPCTL_CHECKSUM:
                   1132:                return (sysctl_int(oldp, oldlenp, newp, newlen, &udpcksum));
1.42      thorpej  1133:        case UDPCTL_SENDSPACE:
                   1134:                return (sysctl_int(oldp, oldlenp, newp, newlen,
                   1135:                    &udp_sendspace));
                   1136:        case UDPCTL_RECVSPACE:
                   1137:                return (sysctl_int(oldp, oldlenp, newp, newlen,
                   1138:                    &udp_recvspace));
1.13      mycroft  1139:        default:
                   1140:                return (ENOPROTOOPT);
                   1141:        }
                   1142:        /* NOTREACHED */
1.1       cgd      1143: }
1.72      itojun   1144: #endif

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