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Annotation of src/sys/netinet/udp_usrreq.c, Revision 1.140

1.140   ! yamt        1: /*     $NetBSD: udp_usrreq.c,v 1.139 2005/08/05 09:21:26 elad Exp $    */
1.48      itojun      2:
                      3: /*
                      4:  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
                      5:  * All rights reserved.
1.94      itojun      6:  *
1.48      itojun      7:  * Redistribution and use in source and binary forms, with or without
                      8:  * modification, are permitted provided that the following conditions
                      9:  * are met:
                     10:  * 1. Redistributions of source code must retain the above copyright
                     11:  *    notice, this list of conditions and the following disclaimer.
                     12:  * 2. Redistributions in binary form must reproduce the above copyright
                     13:  *    notice, this list of conditions and the following disclaimer in the
                     14:  *    documentation and/or other materials provided with the distribution.
                     15:  * 3. Neither the name of the project nor the names of its contributors
                     16:  *    may be used to endorse or promote products derived from this software
                     17:  *    without specific prior written permission.
1.94      itojun     18:  *
1.48      itojun     19:  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
                     20:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     21:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     22:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
                     23:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     24:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     25:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     26:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     27:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     28:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     29:  * SUCH DAMAGE.
                     30:  */
1.14      cgd        31:
1.1       cgd        32: /*
1.44      thorpej    33:  * Copyright (c) 1982, 1986, 1988, 1990, 1993, 1995
1.13      mycroft    34:  *     The Regents of the University of California.  All rights reserved.
1.1       cgd        35:  *
                     36:  * Redistribution and use in source and binary forms, with or without
                     37:  * modification, are permitted provided that the following conditions
                     38:  * are met:
                     39:  * 1. Redistributions of source code must retain the above copyright
                     40:  *    notice, this list of conditions and the following disclaimer.
                     41:  * 2. Redistributions in binary form must reproduce the above copyright
                     42:  *    notice, this list of conditions and the following disclaimer in the
                     43:  *    documentation and/or other materials provided with the distribution.
1.104     agc        44:  * 3. Neither the name of the University nor the names of its contributors
1.1       cgd        45:  *    may be used to endorse or promote products derived from this software
                     46:  *    without specific prior written permission.
                     47:  *
                     48:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     49:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     50:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     51:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     52:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     53:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     54:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     55:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     56:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     57:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     58:  * SUCH DAMAGE.
                     59:  *
1.44      thorpej    60:  *     @(#)udp_usrreq.c        8.6 (Berkeley) 5/23/95
1.1       cgd        61:  */
1.91      lukem      62:
                     63: #include <sys/cdefs.h>
1.140   ! yamt       64: __KERNEL_RCSID(0, "$NetBSD: udp_usrreq.c,v 1.139 2005/08/05 09:21:26 elad Exp $");
1.50      thorpej    65:
1.77      soda       66: #include "opt_inet.h"
1.50      thorpej    67: #include "opt_ipsec.h"
1.78      thorpej    68: #include "opt_inet_csum.h"
1.64      ws         69: #include "opt_ipkdb.h"
1.101     martin     70: #include "opt_mbuftrace.h"
1.1       cgd        71:
1.5       mycroft    72: #include <sys/param.h>
                     73: #include <sys/malloc.h>
                     74: #include <sys/mbuf.h>
                     75: #include <sys/protosw.h>
                     76: #include <sys/socket.h>
                     77: #include <sys/socketvar.h>
1.13      mycroft    78: #include <sys/errno.h>
1.5       mycroft    79: #include <sys/stat.h>
1.27      christos   80: #include <sys/systm.h>
                     81: #include <sys/proc.h>
1.53      itojun     82: #include <sys/domain.h>
1.27      christos   83: #include <sys/sysctl.h>
1.1       cgd        84:
1.5       mycroft    85: #include <net/if.h>
                     86: #include <net/route.h>
1.1       cgd        87:
1.5       mycroft    88: #include <netinet/in.h>
                     89: #include <netinet/in_systm.h>
1.15      cgd        90: #include <netinet/in_var.h>
1.5       mycroft    91: #include <netinet/ip.h>
                     92: #include <netinet/in_pcb.h>
                     93: #include <netinet/ip_var.h>
                     94: #include <netinet/ip_icmp.h>
                     95: #include <netinet/udp.h>
                     96: #include <netinet/udp_var.h>
1.1       cgd        97:
1.130     manu       98: #ifdef IPSEC_NAT_T
                     99: #include <netinet6/ipsec.h>
                    100: #include <netinet6/esp.h>
                    101: #endif
                    102:
1.53      itojun    103: #ifdef INET6
                    104: #include <netinet/ip6.h>
                    105: #include <netinet/icmp6.h>
                    106: #include <netinet6/ip6_var.h>
                    107: #include <netinet6/in6_pcb.h>
                    108: #include <netinet6/udp6_var.h>
                    109: #endif
                    110:
                    111: #ifndef INET6
                    112: /* always need ip6.h for IP6_EXTHDR_GET */
                    113: #include <netinet/ip6.h>
                    114: #endif
                    115:
1.76      itojun    116: #include "faith.h"
                    117: #if defined(NFAITH) && NFAITH > 0
                    118: #include <net/if_faith.h>
                    119: #endif
                    120:
1.27      christos  121: #include <machine/stdarg.h>
                    122:
1.105     jonathan  123: #ifdef FAST_IPSEC
                    124: #include <netipsec/ipsec.h>
1.121     jonathan  125: #include <netipsec/ipsec_var.h>                        /* XXX ipsecstat namespace */
1.105     jonathan  126: #ifdef INET6
                    127: #include <netipsec/ipsec6.h>
                    128: #endif
                    129: #endif /* FAST_IPSEC*/
                    130:
1.48      itojun    131: #ifdef IPSEC
                    132: #include <netinet6/ipsec.h>
                    133: #include <netkey/key.h>
                    134: #endif /*IPSEC*/
                    135:
1.64      ws        136: #ifdef IPKDB
                    137: #include <ipkdb/ipkdb.h>
                    138: #endif
                    139:
1.8       mycroft   140: /*
                    141:  * UDP protocol implementation.
                    142:  * Per RFC 768, August, 1980.
                    143:  */
                    144: #ifndef        COMPAT_42
                    145: int    udpcksum = 1;
                    146: #else
                    147: int    udpcksum = 0;           /* XXX */
                    148: #endif
1.93      matt      149:
                    150: struct inpcbtable udbtable;
                    151: struct udpstat udpstat;
1.8       mycroft   152:
1.72      itojun    153: #ifdef INET
1.130     manu      154: #ifdef IPSEC_NAT_T
                    155: static int udp4_espinudp (struct mbuf *, int, struct sockaddr *,
                    156:        struct socket *);
                    157: #endif
1.119     matt      158: static void udp4_sendup (struct mbuf *, int, struct sockaddr *,
                    159:        struct socket *);
                    160: static int udp4_realinput (struct sockaddr_in *, struct sockaddr_in *,
                    161:        struct mbuf *, int);
1.129     yamt      162: static int udp4_input_checksum(struct mbuf *, const struct udphdr *, int, int);
1.72      itojun    163: #endif
1.53      itojun    164: #ifdef INET6
1.119     matt      165: static void udp6_sendup (struct mbuf *, int, struct sockaddr *,
                    166:        struct socket *);
                    167: static int udp6_realinput (int, struct sockaddr_in6 *,
                    168:        struct sockaddr_in6 *, struct mbuf *, int);
1.129     yamt      169: static int udp6_input_checksum(struct mbuf *, const struct udphdr *, int, int);
1.53      itojun    170: #endif
1.72      itojun    171: #ifdef INET
1.119     matt      172: static void udp_notify (struct inpcb *, int);
1.72      itojun    173: #endif
1.7       mycroft   174:
1.26      mycroft   175: #ifndef UDBHASHSIZE
                    176: #define        UDBHASHSIZE     128
                    177: #endif
                    178: int    udbhashsize = UDBHASHSIZE;
                    179:
1.98      matt      180: #ifdef MBUFTRACE
                    181: struct mowner udp_mowner = { "udp" };
                    182: struct mowner udp_rx_mowner = { "udp", "rx" };
                    183: struct mowner udp_tx_mowner = { "udp", "tx" };
                    184: #endif
                    185:
1.78      thorpej   186: #ifdef UDP_CSUM_COUNTERS
                    187: #include <sys/device.h>
                    188:
1.140   ! yamt      189: #if defined(INET)
1.78      thorpej   190: struct evcnt udp_hwcsum_bad = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
                    191:     NULL, "udp", "hwcsum bad");
                    192: struct evcnt udp_hwcsum_ok = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
                    193:     NULL, "udp", "hwcsum ok");
                    194: struct evcnt udp_hwcsum_data = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
                    195:     NULL, "udp", "hwcsum data");
                    196: struct evcnt udp_swcsum = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
                    197:     NULL, "udp", "swcsum");
                    198:
1.120     matt      199: EVCNT_ATTACH_STATIC(udp_hwcsum_bad);
                    200: EVCNT_ATTACH_STATIC(udp_hwcsum_ok);
                    201: EVCNT_ATTACH_STATIC(udp_hwcsum_data);
                    202: EVCNT_ATTACH_STATIC(udp_swcsum);
1.140   ! yamt      203: #endif /* defined(INET) */
        !           204:
        !           205: #if defined(INET6)
        !           206: struct evcnt udp6_hwcsum_bad = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
        !           207:     NULL, "udp6", "hwcsum bad");
        !           208: struct evcnt udp6_hwcsum_ok = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
        !           209:     NULL, "udp6", "hwcsum ok");
        !           210: struct evcnt udp6_hwcsum_data = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
        !           211:     NULL, "udp6", "hwcsum data");
        !           212: struct evcnt udp6_swcsum = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
        !           213:     NULL, "udp6", "swcsum");
        !           214:
        !           215: EVCNT_ATTACH_STATIC(udp6_hwcsum_bad);
        !           216: EVCNT_ATTACH_STATIC(udp6_hwcsum_ok);
        !           217: EVCNT_ATTACH_STATIC(udp6_hwcsum_data);
        !           218: EVCNT_ATTACH_STATIC(udp6_swcsum);
        !           219: #endif /* defined(INET6) */
        !           220:
        !           221: #define        UDP_CSUM_COUNTER_INCR(ev)       (ev)->ev_count++
1.120     matt      222:
1.78      thorpej   223: #else
                    224:
                    225: #define        UDP_CSUM_COUNTER_INCR(ev)       /* nothing */
                    226:
                    227: #endif /* UDP_CSUM_COUNTERS */
                    228:
1.7       mycroft   229: void
1.119     matt      230: udp_init(void)
1.1       cgd       231: {
1.18      mycroft   232:
1.35      mycroft   233:        in_pcbinit(&udbtable, udbhashsize, udbhashsize);
1.78      thorpej   234:
1.98      matt      235:        MOWNER_ATTACH(&udp_tx_mowner);
                    236:        MOWNER_ATTACH(&udp_rx_mowner);
                    237:        MOWNER_ATTACH(&udp_mowner);
1.1       cgd       238: }
                    239:
1.129     yamt      240: /*
                    241:  * Checksum extended UDP header and data.
                    242:  */
                    243:
                    244: int
                    245: udp_input_checksum(int af, struct mbuf *m, const struct udphdr *uh,
                    246:     int iphlen, int len)
                    247: {
                    248:
                    249:        switch (af) {
1.72      itojun    250: #ifdef INET
1.129     yamt      251:        case AF_INET:
                    252:                return udp4_input_checksum(m, uh, iphlen, len);
                    253: #endif
                    254: #ifdef INET6
                    255:        case AF_INET6:
                    256:                return udp6_input_checksum(m, uh, iphlen, len);
                    257: #endif
                    258:        }
                    259: #ifdef DIAGNOSTIC
                    260:        panic("udp_input_checksum: unknown af %d", af);
                    261: #endif
                    262:        /* NOTREACHED */
                    263:        return -1;
                    264: }
                    265:
                    266: #ifdef INET
                    267:
                    268: /*
                    269:  * Checksum extended UDP header and data.
                    270:  */
                    271:
                    272: static int
                    273: udp4_input_checksum(struct mbuf *m, const struct udphdr *uh,
                    274:     int iphlen, int len)
                    275: {
                    276:
                    277:        /*
                    278:         * XXX it's better to record and check if this mbuf is
                    279:         * already checked.
                    280:         */
                    281:
                    282:        if (uh->uh_sum == 0)
                    283:                return 0;
                    284:
                    285:        switch (m->m_pkthdr.csum_flags &
                    286:            ((m->m_pkthdr.rcvif->if_csum_flags_rx & M_CSUM_UDPv4) |
                    287:            M_CSUM_TCP_UDP_BAD | M_CSUM_DATA)) {
                    288:        case M_CSUM_UDPv4|M_CSUM_TCP_UDP_BAD:
                    289:                UDP_CSUM_COUNTER_INCR(&udp_hwcsum_bad);
                    290:                goto badcsum;
                    291:
                    292:        case M_CSUM_UDPv4|M_CSUM_DATA: {
                    293:                u_int32_t hw_csum = m->m_pkthdr.csum_data;
                    294:
                    295:                UDP_CSUM_COUNTER_INCR(&udp_hwcsum_data);
                    296:                if (m->m_pkthdr.csum_flags & M_CSUM_NO_PSEUDOHDR) {
                    297:                        const struct ip *ip =
                    298:                            mtod(m, const struct ip *);
                    299:
                    300:                        hw_csum = in_cksum_phdr(ip->ip_src.s_addr,
                    301:                            ip->ip_dst.s_addr,
                    302:                            htons(hw_csum + len + IPPROTO_UDP));
                    303:                }
                    304:                if ((hw_csum ^ 0xffff) != 0)
                    305:                        goto badcsum;
                    306:                break;
                    307:        }
                    308:
                    309:        case M_CSUM_UDPv4:
                    310:                /* Checksum was okay. */
                    311:                UDP_CSUM_COUNTER_INCR(&udp_hwcsum_ok);
                    312:                break;
                    313:
                    314:        default:
                    315:                /*
                    316:                 * Need to compute it ourselves.  Maybe skip checksum
                    317:                 * on loopback interfaces.
                    318:                 */
                    319:                if (__predict_true(!(m->m_pkthdr.rcvif->if_flags &
                    320:                                     IFF_LOOPBACK) ||
                    321:                                   udp_do_loopback_cksum)) {
                    322:                        UDP_CSUM_COUNTER_INCR(&udp_swcsum);
                    323:                        if (in4_cksum(m, IPPROTO_UDP, iphlen, len) != 0)
                    324:                                goto badcsum;
                    325:                }
                    326:                break;
                    327:        }
                    328:
                    329:        return 0;
                    330:
                    331: badcsum:
                    332:        udpstat.udps_badsum++;
                    333:        return -1;
                    334: }
                    335:
1.7       mycroft   336: void
1.27      christos  337: udp_input(struct mbuf *m, ...)
1.1       cgd       338: {
1.53      itojun    339:        va_list ap;
                    340:        struct sockaddr_in src, dst;
                    341:        struct ip *ip;
                    342:        struct udphdr *uh;
1.97      simonb    343:        int iphlen;
1.53      itojun    344:        int len;
                    345:        int n;
1.96      itojun    346:        u_int16_t ip_len;
1.53      itojun    347:
                    348:        va_start(ap, m);
                    349:        iphlen = va_arg(ap, int);
1.97      simonb    350:        (void)va_arg(ap, int);          /* ignore value, advance ap */
1.53      itojun    351:        va_end(ap);
                    352:
1.98      matt      353:        MCLAIM(m, &udp_rx_mowner);
1.53      itojun    354:        udpstat.udps_ipackets++;
                    355:
                    356:        /*
                    357:         * Get IP and UDP header together in first mbuf.
                    358:         */
                    359:        ip = mtod(m, struct ip *);
                    360:        IP6_EXTHDR_GET(uh, struct udphdr *, m, iphlen, sizeof(struct udphdr));
                    361:        if (uh == NULL) {
                    362:                udpstat.udps_hdrops++;
                    363:                return;
                    364:        }
1.95      thorpej   365:        KASSERT(UDP_HDR_ALIGNED_P(uh));
1.53      itojun    366:
1.57      itojun    367:        /* destination port of 0 is illegal, based on RFC768. */
                    368:        if (uh->uh_dport == 0)
                    369:                goto bad;
                    370:
1.53      itojun    371:        /*
                    372:         * Make mbuf data length reflect UDP length.
                    373:         * If not enough data to reflect UDP length, drop.
                    374:         */
1.96      itojun    375:        ip_len = ntohs(ip->ip_len);
1.53      itojun    376:        len = ntohs((u_int16_t)uh->uh_ulen);
1.96      itojun    377:        if (ip_len != iphlen + len) {
                    378:                if (ip_len < iphlen + len || len < sizeof(struct udphdr)) {
1.53      itojun    379:                        udpstat.udps_badlen++;
                    380:                        goto bad;
                    381:                }
1.96      itojun    382:                m_adj(m, iphlen + len - ip_len);
1.53      itojun    383:        }
                    384:
                    385:        /*
                    386:         * Checksum extended UDP header and data.
                    387:         */
1.129     yamt      388:        if (udp4_input_checksum(m, uh, iphlen, len))
                    389:                goto badcsum;
1.53      itojun    390:
                    391:        /* construct source and dst sockaddrs. */
                    392:        bzero(&src, sizeof(src));
                    393:        src.sin_family = AF_INET;
                    394:        src.sin_len = sizeof(struct sockaddr_in);
                    395:        bcopy(&ip->ip_src, &src.sin_addr, sizeof(src.sin_addr));
                    396:        src.sin_port = uh->uh_sport;
                    397:        bzero(&dst, sizeof(dst));
                    398:        dst.sin_family = AF_INET;
                    399:        dst.sin_len = sizeof(struct sockaddr_in);
                    400:        bcopy(&ip->ip_dst, &dst.sin_addr, sizeof(dst.sin_addr));
                    401:        dst.sin_port = uh->uh_dport;
                    402:
                    403:        n = udp4_realinput(&src, &dst, m, iphlen);
                    404: #ifdef INET6
                    405:        if (IN_MULTICAST(ip->ip_dst.s_addr) || n == 0) {
                    406:                struct sockaddr_in6 src6, dst6;
                    407:
                    408:                bzero(&src6, sizeof(src6));
                    409:                src6.sin6_family = AF_INET6;
                    410:                src6.sin6_len = sizeof(struct sockaddr_in6);
                    411:                src6.sin6_addr.s6_addr[10] = src6.sin6_addr.s6_addr[11] = 0xff;
                    412:                bcopy(&ip->ip_src, &src6.sin6_addr.s6_addr[12],
                    413:                        sizeof(ip->ip_src));
                    414:                src6.sin6_port = uh->uh_sport;
                    415:                bzero(&dst6, sizeof(dst6));
                    416:                dst6.sin6_family = AF_INET6;
                    417:                dst6.sin6_len = sizeof(struct sockaddr_in6);
                    418:                dst6.sin6_addr.s6_addr[10] = dst6.sin6_addr.s6_addr[11] = 0xff;
                    419:                bcopy(&ip->ip_dst, &dst6.sin6_addr.s6_addr[12],
                    420:                        sizeof(ip->ip_dst));
                    421:                dst6.sin6_port = uh->uh_dport;
                    422:
                    423:                n += udp6_realinput(AF_INET, &src6, &dst6, m, iphlen);
                    424:        }
                    425: #endif
                    426:
                    427:        if (n == 0) {
                    428:                if (m->m_flags & (M_BCAST | M_MCAST)) {
                    429:                        udpstat.udps_noportbcast++;
                    430:                        goto bad;
                    431:                }
1.61      itojun    432:                udpstat.udps_noport++;
1.64      ws        433: #ifdef IPKDB
1.53      itojun    434:                if (checkipkdb(&ip->ip_src, uh->uh_sport, uh->uh_dport,
                    435:                                m, iphlen + sizeof(struct udphdr),
                    436:                                m->m_pkthdr.len - iphlen - sizeof(struct udphdr))) {
                    437:                        /*
                    438:                         * It was a debugger connect packet,
                    439:                         * just drop it now
                    440:                         */
                    441:                        goto bad;
                    442:                }
                    443: #endif
                    444:                icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0);
                    445:                m = NULL;
                    446:        }
                    447:
                    448: bad:
                    449:        if (m)
                    450:                m_freem(m);
1.78      thorpej   451:        return;
                    452:
                    453: badcsum:
                    454:        m_freem(m);
1.53      itojun    455: }
1.72      itojun    456: #endif
1.53      itojun    457:
                    458: #ifdef INET6
1.129     yamt      459: static int
                    460: udp6_input_checksum(struct mbuf *m, const struct udphdr *uh, int off, int len)
                    461: {
                    462:
1.140   ! yamt      463:        /*
        !           464:         * XXX it's better to record and check if this mbuf is
        !           465:         * already checked.
        !           466:         */
        !           467:
1.129     yamt      468:        if (__predict_false((m->m_flags & M_LOOP) && !udp_do_loopback_cksum)) {
                    469:                goto good;
                    470:        }
                    471:        if (uh->uh_sum == 0) {
                    472:                udp6stat.udp6s_nosum++;
                    473:                goto bad;
                    474:        }
1.140   ! yamt      475:
        !           476:        switch (m->m_pkthdr.csum_flags &
        !           477:            ((m->m_pkthdr.rcvif->if_csum_flags_rx & M_CSUM_UDPv6) |
        !           478:            M_CSUM_TCP_UDP_BAD | M_CSUM_DATA)) {
        !           479:        case M_CSUM_UDPv6|M_CSUM_TCP_UDP_BAD:
        !           480:                UDP_CSUM_COUNTER_INCR(&udp6_hwcsum_bad);
1.129     yamt      481:                udp6stat.udp6s_badsum++;
                    482:                goto bad;
1.140   ! yamt      483:
        !           484: #if 0 /* notyet */
        !           485:        case M_CSUM_UDPv6|M_CSUM_DATA:
        !           486: #endif
        !           487:
        !           488:        case M_CSUM_UDPv6:
        !           489:                /* Checksum was okay. */
        !           490:                UDP_CSUM_COUNTER_INCR(&udp6_hwcsum_ok);
        !           491:                break;
        !           492:
        !           493:        default:
        !           494:                /*
        !           495:                 * Need to compute it ourselves.  Maybe skip checksum
        !           496:                 * on loopback interfaces.
        !           497:                 */
        !           498:                UDP_CSUM_COUNTER_INCR(&udp6_swcsum);
        !           499:                if (in6_cksum(m, IPPROTO_UDP, off, len) != 0) {
        !           500:                        udp6stat.udp6s_badsum++;
        !           501:                        goto bad;
        !           502:                }
1.129     yamt      503:        }
                    504:
                    505: good:
                    506:        return 0;
                    507: bad:
                    508:        return -1;
                    509: }
                    510:
1.53      itojun    511: int
1.119     matt      512: udp6_input(struct mbuf **mp, int *offp, int proto)
1.53      itojun    513: {
                    514:        struct mbuf *m = *mp;
                    515:        int off = *offp;
                    516:        struct sockaddr_in6 src, dst;
                    517:        struct ip6_hdr *ip6;
                    518:        struct udphdr *uh;
                    519:        u_int32_t plen, ulen;
                    520:
1.76      itojun    521:        ip6 = mtod(m, struct ip6_hdr *);
                    522:
1.53      itojun    523: #if defined(NFAITH) && 0 < NFAITH
1.76      itojun    524:        if (faithprefix(&ip6->ip6_dst)) {
                    525:                /* send icmp6 host unreach? */
                    526:                m_freem(m);
                    527:                return IPPROTO_DONE;
1.53      itojun    528:        }
                    529: #endif
                    530:
                    531:        udp6stat.udp6s_ipackets++;
                    532:
                    533:        /* check for jumbogram is done in ip6_input.  we can trust pkthdr.len */
                    534:        plen = m->m_pkthdr.len - off;
                    535:        IP6_EXTHDR_GET(uh, struct udphdr *, m, off, sizeof(struct udphdr));
                    536:        if (uh == NULL) {
                    537:                ip6stat.ip6s_tooshort++;
                    538:                return IPPROTO_DONE;
                    539:        }
1.95      thorpej   540:        KASSERT(UDP_HDR_ALIGNED_P(uh));
1.53      itojun    541:        ulen = ntohs((u_short)uh->uh_ulen);
1.69      itojun    542:        /*
                    543:         * RFC2675 section 4: jumbograms will have 0 in the UDP header field,
                    544:         * iff payload length > 0xffff.
                    545:         */
1.53      itojun    546:        if (ulen == 0 && plen > 0xffff)
                    547:                ulen = plen;
                    548:
                    549:        if (plen != ulen) {
                    550:                udp6stat.udp6s_badlen++;
1.54      itojun    551:                goto bad;
                    552:        }
                    553:
1.57      itojun    554:        /* destination port of 0 is illegal, based on RFC768. */
                    555:        if (uh->uh_dport == 0)
                    556:                goto bad;
                    557:
1.54      itojun    558:        /* Be proactive about malicious use of IPv4 mapped address */
                    559:        if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
                    560:            IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
                    561:                /* XXX stat */
1.53      itojun    562:                goto bad;
                    563:        }
                    564:
                    565:        /*
1.125     thorpej   566:         * Checksum extended UDP header and data.  Maybe skip checksum
                    567:         * on loopback interfaces.
1.53      itojun    568:         */
1.129     yamt      569:        if (udp6_input_checksum(m, uh, off, ulen))
                    570:                goto bad;
1.53      itojun    571:
                    572:        /*
                    573:         * Construct source and dst sockaddrs.
                    574:         * Note that ifindex (s6_addr16[1]) is already filled.
                    575:         */
                    576:        bzero(&src, sizeof(src));
                    577:        src.sin6_family = AF_INET6;
                    578:        src.sin6_len = sizeof(struct sockaddr_in6);
1.69      itojun    579:        /* KAME hack: recover scopeid */
                    580:        (void)in6_recoverscope(&src, &ip6->ip6_src, m->m_pkthdr.rcvif);
1.53      itojun    581:        src.sin6_port = uh->uh_sport;
                    582:        bzero(&dst, sizeof(dst));
                    583:        dst.sin6_family = AF_INET6;
                    584:        dst.sin6_len = sizeof(struct sockaddr_in6);
1.69      itojun    585:        /* KAME hack: recover scopeid */
                    586:        (void)in6_recoverscope(&dst, &ip6->ip6_dst, m->m_pkthdr.rcvif);
1.53      itojun    587:        dst.sin6_port = uh->uh_dport;
                    588:
                    589:        if (udp6_realinput(AF_INET6, &src, &dst, m, off) == 0) {
                    590:                if (m->m_flags & M_MCAST) {
                    591:                        udp6stat.udp6s_noportmcast++;
                    592:                        goto bad;
                    593:                }
1.61      itojun    594:                udp6stat.udp6s_noport++;
1.53      itojun    595:                icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0);
                    596:                m = NULL;
                    597:        }
                    598:
                    599: bad:
                    600:        if (m)
                    601:                m_freem(m);
                    602:        return IPPROTO_DONE;
                    603: }
                    604: #endif
                    605:
1.72      itojun    606: #ifdef INET
1.53      itojun    607: static void
1.119     matt      608: udp4_sendup(struct mbuf *m, int off /* offset of data portion */,
                    609:        struct sockaddr *src, struct socket *so)
1.53      itojun    610: {
                    611:        struct mbuf *opts = NULL;
                    612:        struct mbuf *n;
                    613:        struct inpcb *inp = NULL;
                    614:
                    615:        if (!so)
                    616:                return;
                    617:        switch (so->so_proto->pr_domain->dom_family) {
                    618:        case AF_INET:
                    619:                inp = sotoinpcb(so);
                    620:                break;
                    621: #ifdef INET6
                    622:        case AF_INET6:
                    623:                break;
                    624: #endif
                    625:        default:
                    626:                return;
                    627:        }
                    628:
1.105     jonathan  629: #if defined(IPSEC) || defined(FAST_IPSEC)
1.53      itojun    630:        /* check AH/ESP integrity. */
                    631:        if (so != NULL && ipsec4_in_reject_so(m, so)) {
                    632:                ipsecstat.in_polvio++;
1.110     itojun    633:                if ((n = m_copy(m, 0, M_COPYALL)) != NULL)
                    634:                        icmp_error(n, ICMP_UNREACH, ICMP_UNREACH_ADMIN_PROHIBIT,
                    635:                            0, 0);
1.53      itojun    636:                return;
                    637:        }
                    638: #endif /*IPSEC*/
                    639:
                    640:        if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
                    641:                if (inp && (inp->inp_flags & INP_CONTROLOPTS
                    642:                         || so->so_options & SO_TIMESTAMP)) {
                    643:                        struct ip *ip = mtod(n, struct ip *);
                    644:                        ip_savecontrol(inp, &opts, ip, n);
                    645:                }
                    646:
                    647:                m_adj(n, off);
                    648:                if (sbappendaddr(&so->so_rcv, src, n,
                    649:                                opts) == 0) {
                    650:                        m_freem(n);
                    651:                        if (opts)
                    652:                                m_freem(opts);
1.124     darrenr   653:                        so->so_rcv.sb_overflowed++;
1.81      enami     654:                        udpstat.udps_fullsock++;
1.53      itojun    655:                } else
                    656:                        sorwakeup(so);
                    657:        }
                    658: }
1.72      itojun    659: #endif
1.53      itojun    660:
                    661: #ifdef INET6
                    662: static void
1.119     matt      663: udp6_sendup(struct mbuf *m, int off /* offset of data portion */,
                    664:        struct sockaddr *src, struct socket *so)
1.53      itojun    665: {
                    666:        struct mbuf *opts = NULL;
                    667:        struct mbuf *n;
                    668:        struct in6pcb *in6p = NULL;
                    669:
                    670:        if (!so)
                    671:                return;
                    672:        if (so->so_proto->pr_domain->dom_family != AF_INET6)
                    673:                return;
                    674:        in6p = sotoin6pcb(so);
                    675:
1.105     jonathan  676: #if defined(IPSEC) || defined(FAST_IPSEC)
1.53      itojun    677:        /* check AH/ESP integrity. */
                    678:        if (so != NULL && ipsec6_in_reject_so(m, so)) {
                    679:                ipsec6stat.in_polvio++;
1.111     mycroft   680:                if ((n = m_copy(m, 0, M_COPYALL)) != NULL)
1.110     itojun    681:                        icmp6_error(n, ICMP6_DST_UNREACH,
                    682:                            ICMP6_DST_UNREACH_ADMIN, 0);
1.53      itojun    683:                return;
                    684:        }
                    685: #endif /*IPSEC*/
                    686:
                    687:        if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
                    688:                if (in6p && (in6p->in6p_flags & IN6P_CONTROLOPTS
                    689:                          || in6p->in6p_socket->so_options & SO_TIMESTAMP)) {
                    690:                        struct ip6_hdr *ip6 = mtod(n, struct ip6_hdr *);
                    691:                        ip6_savecontrol(in6p, &opts, ip6, n);
                    692:                }
                    693:
                    694:                m_adj(n, off);
                    695:                if (sbappendaddr(&so->so_rcv, src, n, opts) == 0) {
                    696:                        m_freem(n);
                    697:                        if (opts)
                    698:                                m_freem(opts);
1.124     darrenr   699:                        so->so_rcv.sb_overflowed++;
1.53      itojun    700:                        udp6stat.udp6s_fullsock++;
                    701:                } else
                    702:                        sorwakeup(so);
                    703:        }
                    704: }
                    705: #endif
                    706:
1.72      itojun    707: #ifdef INET
1.53      itojun    708: static int
1.119     matt      709: udp4_realinput(struct sockaddr_in *src, struct sockaddr_in *dst,
                    710:        struct mbuf *m, int off /* offset of udphdr */)
1.53      itojun    711: {
                    712:        u_int16_t *sport, *dport;
                    713:        int rcvcnt;
                    714:        struct in_addr *src4, *dst4;
1.109     itojun    715:        struct inpcb_hdr *inph;
1.53      itojun    716:        struct inpcb *inp;
                    717:
                    718:        rcvcnt = 0;
                    719:        off += sizeof(struct udphdr);   /* now, offset of payload */
                    720:
                    721:        if (src->sin_family != AF_INET || dst->sin_family != AF_INET)
                    722:                goto bad;
                    723:
                    724:        src4 = &src->sin_addr;
                    725:        sport = &src->sin_port;
                    726:        dst4 = &dst->sin_addr;
                    727:        dport = &dst->sin_port;
                    728:
1.73      itojun    729:        if (IN_MULTICAST(dst4->s_addr) ||
1.53      itojun    730:            in_broadcast(*dst4, m->m_pkthdr.rcvif)) {
                    731:                /*
                    732:                 * Deliver a multicast or broadcast datagram to *all* sockets
                    733:                 * for which the local and remote addresses and ports match
                    734:                 * those of the incoming datagram.  This allows more than
                    735:                 * one process to receive multi/broadcasts on the same port.
                    736:                 * (This really ought to be done for unicast datagrams as
                    737:                 * well, but that would cause problems with existing
                    738:                 * applications that open both address-specific sockets and
                    739:                 * a wildcard socket listening to the same port -- they would
                    740:                 * end up receiving duplicates of every unicast datagram.
                    741:                 * Those applications open the multiple sockets to overcome an
                    742:                 * inadequacy of the UDP socket interface, but for backwards
                    743:                 * compatibility we avoid the problem here rather than
                    744:                 * fixing the interface.  Maybe 4.5BSD will remedy this?)
                    745:                 */
                    746:
                    747:                /*
1.92      itojun    748:                 * KAME note: traditionally we dropped udpiphdr from mbuf here.
1.71      itojun    749:                 * we need udpiphdr for IPsec processing so we do that later.
1.53      itojun    750:                 */
                    751:                /*
                    752:                 * Locate pcb(s) for datagram.
                    753:                 */
1.109     itojun    754:                CIRCLEQ_FOREACH(inph, &udbtable.inpt_queue, inph_queue) {
                    755:                        inp = (struct inpcb *)inph;
                    756:                        if (inp->inp_af != AF_INET)
                    757:                                continue;
                    758:
1.53      itojun    759:                        if (inp->inp_lport != *dport)
                    760:                                continue;
                    761:                        if (!in_nullhost(inp->inp_laddr)) {
                    762:                                if (!in_hosteq(inp->inp_laddr, *dst4))
                    763:                                        continue;
                    764:                        }
                    765:                        if (!in_nullhost(inp->inp_faddr)) {
                    766:                                if (!in_hosteq(inp->inp_faddr, *src4) ||
                    767:                                    inp->inp_fport != *sport)
                    768:                                        continue;
                    769:                        }
                    770:
                    771:                        udp4_sendup(m, off, (struct sockaddr *)src,
                    772:                                inp->inp_socket);
                    773:                        rcvcnt++;
                    774:
                    775:                        /*
                    776:                         * Don't look for additional matches if this one does
                    777:                         * not have either the SO_REUSEPORT or SO_REUSEADDR
                    778:                         * socket options set.  This heuristic avoids searching
                    779:                         * through all pcbs in the common case of a non-shared
                    780:                         * port.  It assumes that an application will never
                    781:                         * clear these options after setting them.
                    782:                         */
                    783:                        if ((inp->inp_socket->so_options &
                    784:                            (SO_REUSEPORT|SO_REUSEADDR)) == 0)
                    785:                                break;
                    786:                }
                    787:        } else {
                    788:                /*
                    789:                 * Locate pcb for datagram.
                    790:                 */
                    791:                inp = in_pcblookup_connect(&udbtable, *src4, *sport, *dst4, *dport);
                    792:                if (inp == 0) {
                    793:                        ++udpstat.udps_pcbhashmiss;
                    794:                        inp = in_pcblookup_bind(&udbtable, *dst4, *dport);
1.82      itojun    795:                        if (inp == 0)
1.53      itojun    796:                                return rcvcnt;
                    797:                }
                    798:
1.130     manu      799: #ifdef IPSEC_NAT_T
                    800:                /* Handle ESP over UDP */
                    801:                if (inp->inp_flags & INP_ESPINUDP_ALL) {
                    802:                        struct sockaddr *sa = (struct sockaddr *)src;
                    803:
                    804:                        if (udp4_espinudp(m, off, sa, inp->inp_socket) != 0) {
                    805:                                rcvcnt++;
                    806:                                goto bad;
                    807:                        }
                    808:
                    809:                        /* Normal UDP processing will take place */
                    810:                }
                    811: #endif
                    812:
1.53      itojun    813:                udp4_sendup(m, off, (struct sockaddr *)src, inp->inp_socket);
                    814:                rcvcnt++;
                    815:        }
                    816:
                    817: bad:
                    818:        return rcvcnt;
                    819: }
1.72      itojun    820: #endif
1.53      itojun    821:
                    822: #ifdef INET6
                    823: static int
1.119     matt      824: udp6_realinput(int af, struct sockaddr_in6 *src, struct sockaddr_in6 *dst,
                    825:        struct mbuf *m, int off)
1.53      itojun    826: {
1.79      itojun    827:        u_int16_t sport, dport;
1.53      itojun    828:        int rcvcnt;
1.79      itojun    829:        struct in6_addr src6, dst6;
                    830:        const struct in_addr *dst4;
1.109     itojun    831:        struct inpcb_hdr *inph;
1.53      itojun    832:        struct in6pcb *in6p;
                    833:
                    834:        rcvcnt = 0;
                    835:        off += sizeof(struct udphdr);   /* now, offset of payload */
                    836:
                    837:        if (af != AF_INET && af != AF_INET6)
                    838:                goto bad;
                    839:        if (src->sin6_family != AF_INET6 || dst->sin6_family != AF_INET6)
                    840:                goto bad;
                    841:
1.79      itojun    842:        in6_embedscope(&src6, src, NULL, NULL);
                    843:        sport = src->sin6_port;
                    844:        in6_embedscope(&dst6, dst, NULL, NULL);
                    845:        dport = dst->sin6_port;
1.88      itojun    846:        dst4 = (struct in_addr *)&dst->sin6_addr.s6_addr[12];
1.53      itojun    847:
1.79      itojun    848:        if (IN6_IS_ADDR_MULTICAST(&dst6) ||
                    849:            (af == AF_INET && IN_MULTICAST(dst4->s_addr))) {
1.53      itojun    850:                /*
                    851:                 * Deliver a multicast or broadcast datagram to *all* sockets
                    852:                 * for which the local and remote addresses and ports match
                    853:                 * those of the incoming datagram.  This allows more than
                    854:                 * one process to receive multi/broadcasts on the same port.
                    855:                 * (This really ought to be done for unicast datagrams as
                    856:                 * well, but that would cause problems with existing
                    857:                 * applications that open both address-specific sockets and
                    858:                 * a wildcard socket listening to the same port -- they would
                    859:                 * end up receiving duplicates of every unicast datagram.
                    860:                 * Those applications open the multiple sockets to overcome an
                    861:                 * inadequacy of the UDP socket interface, but for backwards
                    862:                 * compatibility we avoid the problem here rather than
                    863:                 * fixing the interface.  Maybe 4.5BSD will remedy this?)
                    864:                 */
                    865:
                    866:                /*
1.92      itojun    867:                 * KAME note: traditionally we dropped udpiphdr from mbuf here.
1.71      itojun    868:                 * we need udpiphdr for IPsec processing so we do that later.
1.53      itojun    869:                 */
                    870:                /*
                    871:                 * Locate pcb(s) for datagram.
                    872:                 */
1.109     itojun    873:                CIRCLEQ_FOREACH(inph, &udbtable.inpt_queue, inph_queue) {
                    874:                        in6p = (struct in6pcb *)inph;
                    875:                        if (in6p->in6p_af != AF_INET6)
                    876:                                continue;
                    877:
1.79      itojun    878:                        if (in6p->in6p_lport != dport)
1.53      itojun    879:                                continue;
                    880:                        if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) {
1.90      itojun    881:                                if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &dst6))
1.53      itojun    882:                                        continue;
1.92      itojun    883:                        } else {
1.79      itojun    884:                                if (IN6_IS_ADDR_V4MAPPED(&dst6) &&
1.85      itojun    885:                                    (in6p->in6p_flags & IN6P_IPV6_V6ONLY))
1.55      itojun    886:                                        continue;
                    887:                        }
1.53      itojun    888:                        if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
1.79      itojun    889:                                if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr,
                    890:                                    &src6) || in6p->in6p_fport != sport)
1.53      itojun    891:                                        continue;
1.92      itojun    892:                        } else {
1.79      itojun    893:                                if (IN6_IS_ADDR_V4MAPPED(&src6) &&
1.85      itojun    894:                                    (in6p->in6p_flags & IN6P_IPV6_V6ONLY))
1.55      itojun    895:                                        continue;
                    896:                        }
1.53      itojun    897:
                    898:                        udp6_sendup(m, off, (struct sockaddr *)src,
                    899:                                in6p->in6p_socket);
                    900:                        rcvcnt++;
                    901:
                    902:                        /*
                    903:                         * Don't look for additional matches if this one does
                    904:                         * not have either the SO_REUSEPORT or SO_REUSEADDR
                    905:                         * socket options set.  This heuristic avoids searching
                    906:                         * through all pcbs in the common case of a non-shared
                    907:                         * port.  It assumes that an application will never
                    908:                         * clear these options after setting them.
                    909:                         */
                    910:                        if ((in6p->in6p_socket->so_options &
                    911:                            (SO_REUSEPORT|SO_REUSEADDR)) == 0)
                    912:                                break;
                    913:                }
                    914:        } else {
                    915:                /*
                    916:                 * Locate pcb for datagram.
                    917:                 */
1.109     itojun    918:                in6p = in6_pcblookup_connect(&udbtable, &src6, sport,
1.79      itojun    919:                    &dst6, dport, 0);
1.53      itojun    920:                if (in6p == 0) {
                    921:                        ++udpstat.udps_pcbhashmiss;
1.109     itojun    922:                        in6p = in6_pcblookup_bind(&udbtable, &dst6, dport, 0);
1.82      itojun    923:                        if (in6p == 0)
1.53      itojun    924:                                return rcvcnt;
                    925:                }
                    926:
                    927:                udp6_sendup(m, off, (struct sockaddr *)src, in6p->in6p_socket);
                    928:                rcvcnt++;
                    929:        }
                    930:
                    931: bad:
                    932:        return rcvcnt;
                    933: }
                    934: #endif
1.1       cgd       935:
1.72      itojun    936: #ifdef INET
1.1       cgd       937: /*
                    938:  * Notify a udp user of an asynchronous error;
                    939:  * just wake up so that he can collect error status.
                    940:  */
1.7       mycroft   941: static void
1.119     matt      942: udp_notify(struct inpcb *inp, int errno)
1.1       cgd       943: {
                    944:        inp->inp_socket->so_error = errno;
                    945:        sorwakeup(inp->inp_socket);
                    946:        sowwakeup(inp->inp_socket);
                    947: }
                    948:
1.27      christos  949: void *
1.119     matt      950: udp_ctlinput(int cmd, struct sockaddr *sa, void *v)
1.1       cgd       951: {
1.66      augustss  952:        struct ip *ip = v;
                    953:        struct udphdr *uh;
1.119     matt      954:        void (*notify)(struct inpcb *, int) = udp_notify;
1.21      mycroft   955:        int errno;
1.1       cgd       956:
1.53      itojun    957:        if (sa->sa_family != AF_INET
                    958:         || sa->sa_len != sizeof(struct sockaddr_in))
1.51      itojun    959:                return NULL;
1.20      mycroft   960:        if ((unsigned)cmd >= PRC_NCMDS)
1.27      christos  961:                return NULL;
1.20      mycroft   962:        errno = inetctlerrmap[cmd];
1.18      mycroft   963:        if (PRC_IS_REDIRECT(cmd))
1.19      mycroft   964:                notify = in_rtchange, ip = 0;
1.18      mycroft   965:        else if (cmd == PRC_HOSTDEAD)
1.19      mycroft   966:                ip = 0;
1.23      cgd       967:        else if (errno == 0)
1.27      christos  968:                return NULL;
1.19      mycroft   969:        if (ip) {
1.1       cgd       970:                uh = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2));
1.34      mycroft   971:                in_pcbnotify(&udbtable, satosin(sa)->sin_addr, uh->uh_dport,
                    972:                    ip->ip_src, uh->uh_sport, errno, notify);
1.53      itojun    973:
                    974:                /* XXX mapped address case */
1.19      mycroft   975:        } else
1.34      mycroft   976:                in_pcbnotifyall(&udbtable, satosin(sa)->sin_addr, errno,
                    977:                    notify);
1.27      christos  978:        return NULL;
1.1       cgd       979: }
                    980:
1.7       mycroft   981: int
1.131     perry     982: udp_ctloutput(op, so, level, optname, mp)
1.130     manu      983:        int op;
                    984:        struct socket *so;
                    985:        int level, optname;
                    986:        struct mbuf **mp;
                    987: {
                    988:        int s;
                    989:        int error = 0;
                    990:        struct mbuf *m;
                    991:        struct inpcb *inp;
                    992:        int family;
                    993:
                    994:        family = so->so_proto->pr_domain->dom_family;
                    995:
                    996:        s = splsoftnet();
                    997:        switch (family) {
                    998: #ifdef INET
                    999:        case PF_INET:
                   1000:                if (level != IPPROTO_UDP) {
                   1001:                        error = ip_ctloutput(op, so, level, optname, mp);
                   1002:                        goto end;
                   1003:                }
                   1004:                break;
                   1005: #endif
                   1006: #ifdef INET6
                   1007:        case PF_INET6:
                   1008:                if (level != IPPROTO_UDP) {
                   1009:                        error = ip6_ctloutput(op, so, level, optname, mp);
                   1010:                        goto end;
                   1011:                }
                   1012:                break;
                   1013: #endif
                   1014:        default:
                   1015:                error = EAFNOSUPPORT;
                   1016:                goto end;
                   1017:                break;
                   1018:        }
                   1019:
                   1020:
                   1021:        switch (op) {
                   1022:        case PRCO_SETOPT:
                   1023:                m = *mp;
                   1024:                inp = sotoinpcb(so);
                   1025:
                   1026:                switch (optname) {
                   1027:                case UDP_ENCAP:
                   1028:                        if (m == NULL || m->m_len < sizeof (int)) {
                   1029:                                error = EINVAL;
                   1030:                                goto end;
                   1031:                        }
1.131     perry    1032:
1.130     manu     1033:                        switch(*mtod(m, int *)) {
                   1034: #ifdef IPSEC_NAT_T
                   1035:                        case 0:
                   1036:                                inp->inp_flags &= ~INP_ESPINUDP_ALL;
                   1037:                                break;
                   1038:
                   1039:                        case UDP_ENCAP_ESPINUDP:
                   1040:                                inp->inp_flags &= ~INP_ESPINUDP_ALL;
                   1041:                                inp->inp_flags |= INP_ESPINUDP;
                   1042:                                break;
1.131     perry    1043:
1.130     manu     1044:                        case UDP_ENCAP_ESPINUDP_NON_IKE:
                   1045:                                inp->inp_flags &= ~INP_ESPINUDP_ALL;
                   1046:                                inp->inp_flags |= INP_ESPINUDP_NON_IKE;
                   1047:                                break;
                   1048: #endif
                   1049:                        default:
                   1050:                                error = EINVAL;
                   1051:                                goto end;
                   1052:                                break;
                   1053:                        }
                   1054:                        break;
                   1055:
                   1056:                default:
                   1057:                        error = ENOPROTOOPT;
                   1058:                        goto end;
                   1059:                        break;
                   1060:                }
                   1061:                break;
                   1062:
                   1063:        default:
                   1064:                error = EINVAL;
                   1065:                goto end;
                   1066:                break;
1.131     perry    1067:        }
                   1068:
1.130     manu     1069: end:
                   1070:        splx(s);
                   1071:        return error;
                   1072: }
1.131     perry    1073:
1.130     manu     1074:
                   1075: int
1.27      christos 1076: udp_output(struct mbuf *m, ...)
                   1077: {
1.66      augustss 1078:        struct inpcb *inp;
                   1079:        struct udpiphdr *ui;
1.125     thorpej  1080:        struct route *ro;
1.66      augustss 1081:        int len = m->m_pkthdr.len;
1.31      mycroft  1082:        int error = 0;
1.27      christos 1083:        va_list ap;
                   1084:
1.98      matt     1085:        MCLAIM(m, &udp_tx_mowner);
1.27      christos 1086:        va_start(ap, m);
                   1087:        inp = va_arg(ap, struct inpcb *);
                   1088:        va_end(ap);
1.1       cgd      1089:
                   1090:        /*
                   1091:         * Calculate data length and get a mbuf
                   1092:         * for UDP and IP headers.
                   1093:         */
1.13      mycroft  1094:        M_PREPEND(m, sizeof(struct udpiphdr), M_DONTWAIT);
                   1095:        if (m == 0) {
                   1096:                error = ENOBUFS;
1.39      thorpej  1097:                goto release;
                   1098:        }
                   1099:
                   1100:        /*
                   1101:         * Compute the packet length of the IP header, and
                   1102:         * punt if the length looks bogus.
                   1103:         */
1.96      itojun   1104:        if (len + sizeof(struct udpiphdr) > IP_MAXPACKET) {
1.39      thorpej  1105:                error = EMSGSIZE;
1.13      mycroft  1106:                goto release;
                   1107:        }
1.1       cgd      1108:
                   1109:        /*
                   1110:         * Fill in mbuf with extended UDP header
                   1111:         * and addresses and length put into network format.
                   1112:         */
                   1113:        ui = mtod(m, struct udpiphdr *);
                   1114:        ui->ui_pr = IPPROTO_UDP;
                   1115:        ui->ui_src = inp->inp_laddr;
                   1116:        ui->ui_dst = inp->inp_faddr;
                   1117:        ui->ui_sport = inp->inp_lport;
                   1118:        ui->ui_dport = inp->inp_fport;
1.78      thorpej  1119:        ui->ui_ulen = htons((u_int16_t)len + sizeof(struct udphdr));
1.1       cgd      1120:
1.125     thorpej  1121:        ro = &inp->inp_route;
                   1122:
1.1       cgd      1123:        /*
1.78      thorpej  1124:         * Set up checksum and output datagram.
1.1       cgd      1125:         */
                   1126:        if (udpcksum) {
1.78      thorpej  1127:                /*
                   1128:                 * XXX Cache pseudo-header checksum part for
                   1129:                 * XXX "connected" UDP sockets.
                   1130:                 */
                   1131:                ui->ui_sum = in_cksum_phdr(ui->ui_src.s_addr,
                   1132:                    ui->ui_dst.s_addr, htons((u_int16_t)len +
                   1133:                    sizeof(struct udphdr) + IPPROTO_UDP));
1.135     yamt     1134:                m->m_pkthdr.csum_flags = M_CSUM_UDPv4;
1.78      thorpej  1135:                m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum);
                   1136:        } else
                   1137:                ui->ui_sum = 0;
1.96      itojun   1138:        ((struct ip *)ui)->ip_len = htons(sizeof (struct udpiphdr) + len);
1.1       cgd      1139:        ((struct ip *)ui)->ip_ttl = inp->inp_ip.ip_ttl; /* XXX */
                   1140:        ((struct ip *)ui)->ip_tos = inp->inp_ip.ip_tos; /* XXX */
                   1141:        udpstat.udps_opackets++;
1.48      itojun   1142:
1.125     thorpej  1143:        return (ip_output(m, inp->inp_options, ro,
1.12      mycroft  1144:            inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST),
1.107     itojun   1145:            inp->inp_moptions, inp->inp_socket));
1.1       cgd      1146:
                   1147: release:
                   1148:        m_freem(m);
                   1149:        return (error);
                   1150: }
                   1151:
1.42      thorpej  1152: int    udp_sendspace = 9216;           /* really max datagram size */
                   1153: int    udp_recvspace = 40 * (1024 + sizeof(struct sockaddr_in));
1.1       cgd      1154:                                        /* 40 1K datagrams */
                   1155:
                   1156: /*ARGSUSED*/
1.7       mycroft  1157: int
1.119     matt     1158: udp_usrreq(struct socket *so, int req, struct mbuf *m, struct mbuf *nam,
                   1159:        struct mbuf *control, struct proc *p)
1.1       cgd      1160: {
1.66      augustss 1161:        struct inpcb *inp;
1.1       cgd      1162:        int s;
1.66      augustss 1163:        int error = 0;
1.1       cgd      1164:
                   1165:        if (req == PRU_CONTROL)
1.31      mycroft  1166:                return (in_control(so, (long)m, (caddr_t)nam,
1.30      mycroft  1167:                    (struct ifnet *)control, p));
1.59      thorpej  1168:
1.60      thorpej  1169:        if (req == PRU_PURGEIF) {
1.80      itojun   1170:                in_pcbpurgeif0(&udbtable, (struct ifnet *)control);
1.60      thorpej  1171:                in_purgeif((struct ifnet *)control);
                   1172:                in_pcbpurgeif(&udbtable, (struct ifnet *)control);
1.59      thorpej  1173:                return (0);
                   1174:        }
1.31      mycroft  1175:
                   1176:        s = splsoftnet();
                   1177:        inp = sotoinpcb(so);
1.32      mycroft  1178: #ifdef DIAGNOSTIC
                   1179:        if (req != PRU_SEND && req != PRU_SENDOOB && control)
                   1180:                panic("udp_usrreq: unexpected control mbuf");
                   1181: #endif
1.31      mycroft  1182:        if (inp == 0 && req != PRU_ATTACH) {
                   1183:                error = EINVAL;
                   1184:                goto release;
                   1185:        }
                   1186:
1.1       cgd      1187:        /*
                   1188:         * Note: need to block udp_input while changing
                   1189:         * the udp pcb queue and/or pcb addresses.
                   1190:         */
                   1191:        switch (req) {
                   1192:
                   1193:        case PRU_ATTACH:
1.31      mycroft  1194:                if (inp != 0) {
                   1195:                        error = EISCONN;
1.1       cgd      1196:                        break;
                   1197:                }
1.98      matt     1198: #ifdef MBUFTRACE
                   1199:                so->so_mowner = &udp_mowner;
                   1200:                so->so_rcv.sb_mowner = &udp_rx_mowner;
                   1201:                so->so_snd.sb_mowner = &udp_tx_mowner;
                   1202: #endif
1.31      mycroft  1203:                if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
                   1204:                        error = soreserve(so, udp_sendspace, udp_recvspace);
                   1205:                        if (error)
                   1206:                                break;
                   1207:                }
1.18      mycroft  1208:                error = in_pcballoc(so, &udbtable);
1.1       cgd      1209:                if (error)
                   1210:                        break;
1.31      mycroft  1211:                inp = sotoinpcb(so);
                   1212:                inp->inp_ip.ip_ttl = ip_defttl;
1.1       cgd      1213:                break;
                   1214:
                   1215:        case PRU_DETACH:
1.31      mycroft  1216:                in_pcbdetach(inp);
1.1       cgd      1217:                break;
                   1218:
                   1219:        case PRU_BIND:
1.31      mycroft  1220:                error = in_pcbbind(inp, nam, p);
1.1       cgd      1221:                break;
                   1222:
                   1223:        case PRU_LISTEN:
                   1224:                error = EOPNOTSUPP;
                   1225:                break;
                   1226:
                   1227:        case PRU_CONNECT:
1.31      mycroft  1228:                error = in_pcbconnect(inp, nam);
                   1229:                if (error)
1.1       cgd      1230:                        break;
1.31      mycroft  1231:                soisconnected(so);
1.1       cgd      1232:                break;
                   1233:
                   1234:        case PRU_CONNECT2:
                   1235:                error = EOPNOTSUPP;
                   1236:                break;
                   1237:
                   1238:        case PRU_DISCONNECT:
1.31      mycroft  1239:                /*soisdisconnected(so);*/
                   1240:                so->so_state &= ~SS_ISCONNECTED;        /* XXX */
1.1       cgd      1241:                in_pcbdisconnect(inp);
1.34      mycroft  1242:                inp->inp_laddr = zeroin_addr;           /* XXX */
1.35      mycroft  1243:                in_pcbstate(inp, INP_BOUND);            /* XXX */
1.1       cgd      1244:                break;
                   1245:
                   1246:        case PRU_SHUTDOWN:
                   1247:                socantsendmore(so);
                   1248:                break;
                   1249:
1.31      mycroft  1250:        case PRU_RCVD:
                   1251:                error = EOPNOTSUPP;
1.1       cgd      1252:                break;
                   1253:
1.31      mycroft  1254:        case PRU_SEND:
1.32      mycroft  1255:                if (control && control->m_len) {
                   1256:                        m_freem(control);
                   1257:                        m_freem(m);
                   1258:                        error = EINVAL;
                   1259:                        break;
                   1260:                }
1.31      mycroft  1261:        {
1.35      mycroft  1262:                struct in_addr laddr;                   /* XXX */
1.1       cgd      1263:
1.31      mycroft  1264:                if (nam) {
1.35      mycroft  1265:                        laddr = inp->inp_laddr;         /* XXX */
1.31      mycroft  1266:                        if ((so->so_state & SS_ISCONNECTED) != 0) {
                   1267:                                error = EISCONN;
1.32      mycroft  1268:                                goto die;
1.31      mycroft  1269:                        }
                   1270:                        error = in_pcbconnect(inp, nam);
1.100     matt     1271:                        if (error)
                   1272:                                goto die;
1.31      mycroft  1273:                } else {
                   1274:                        if ((so->so_state & SS_ISCONNECTED) == 0) {
                   1275:                                error = ENOTCONN;
1.32      mycroft  1276:                                goto die;
1.31      mycroft  1277:                        }
                   1278:                }
1.33      mycroft  1279:                error = udp_output(m, inp);
1.100     matt     1280:                m = NULL;
1.31      mycroft  1281:                if (nam) {
                   1282:                        in_pcbdisconnect(inp);
1.35      mycroft  1283:                        inp->inp_laddr = laddr;         /* XXX */
                   1284:                        in_pcbstate(inp, INP_BOUND);    /* XXX */
1.31      mycroft  1285:                }
1.100     matt     1286:          die:
                   1287:                if (m)
                   1288:                        m_freem(m);
1.31      mycroft  1289:        }
1.1       cgd      1290:                break;
                   1291:
                   1292:        case PRU_SENSE:
                   1293:                /*
                   1294:                 * stat: don't bother with a blocksize.
                   1295:                 */
1.31      mycroft  1296:                splx(s);
1.1       cgd      1297:                return (0);
                   1298:
1.31      mycroft  1299:        case PRU_RCVOOB:
                   1300:                error =  EOPNOTSUPP;
                   1301:                break;
                   1302:
1.1       cgd      1303:        case PRU_SENDOOB:
1.32      mycroft  1304:                m_freem(control);
1.31      mycroft  1305:                m_freem(m);
1.1       cgd      1306:                error =  EOPNOTSUPP;
                   1307:                break;
                   1308:
1.31      mycroft  1309:        case PRU_SOCKADDR:
                   1310:                in_setsockaddr(inp, nam);
                   1311:                break;
                   1312:
                   1313:        case PRU_PEERADDR:
                   1314:                in_setpeeraddr(inp, nam);
                   1315:                break;
1.1       cgd      1316:
                   1317:        default:
                   1318:                panic("udp_usrreq");
                   1319:        }
                   1320:
                   1321: release:
1.31      mycroft  1322:        splx(s);
1.1       cgd      1323:        return (error);
1.13      mycroft  1324: }
                   1325:
                   1326: /*
                   1327:  * Sysctl for udp variables.
                   1328:  */
1.114     atatat   1329: SYSCTL_SETUP(sysctl_net_inet_udp_setup, "sysctl net.inet.udp subtree setup")
1.13      mycroft  1330: {
1.114     atatat   1331:
1.116     atatat   1332:        sysctl_createv(clog, 0, NULL, NULL,
                   1333:                       CTLFLAG_PERMANENT,
1.114     atatat   1334:                       CTLTYPE_NODE, "net", NULL,
                   1335:                       NULL, 0, NULL, 0,
                   1336:                       CTL_NET, CTL_EOL);
1.116     atatat   1337:        sysctl_createv(clog, 0, NULL, NULL,
                   1338:                       CTLFLAG_PERMANENT,
1.114     atatat   1339:                       CTLTYPE_NODE, "inet", NULL,
                   1340:                       NULL, 0, NULL, 0,
                   1341:                       CTL_NET, PF_INET, CTL_EOL);
1.116     atatat   1342:        sysctl_createv(clog, 0, NULL, NULL,
                   1343:                       CTLFLAG_PERMANENT,
1.122     atatat   1344:                       CTLTYPE_NODE, "udp",
                   1345:                       SYSCTL_DESCR("UDPv4 related settings"),
1.114     atatat   1346:                       NULL, 0, NULL, 0,
                   1347:                       CTL_NET, PF_INET, IPPROTO_UDP, CTL_EOL);
                   1348:
1.116     atatat   1349:        sysctl_createv(clog, 0, NULL, NULL,
                   1350:                       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.122     atatat   1351:                       CTLTYPE_INT, "checksum",
1.123     heas     1352:                       SYSCTL_DESCR("Compute UDP checksums"),
1.114     atatat   1353:                       NULL, 0, &udpcksum, 0,
                   1354:                       CTL_NET, PF_INET, IPPROTO_UDP, UDPCTL_CHECKSUM,
                   1355:                       CTL_EOL);
1.116     atatat   1356:        sysctl_createv(clog, 0, NULL, NULL,
                   1357:                       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.122     atatat   1358:                       CTLTYPE_INT, "sendspace",
                   1359:                       SYSCTL_DESCR("Default UDP send buffer size"),
1.114     atatat   1360:                       NULL, 0, &udp_sendspace, 0,
                   1361:                       CTL_NET, PF_INET, IPPROTO_UDP, UDPCTL_SENDSPACE,
                   1362:                       CTL_EOL);
1.116     atatat   1363:        sysctl_createv(clog, 0, NULL, NULL,
                   1364:                       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.122     atatat   1365:                       CTLTYPE_INT, "recvspace",
                   1366:                       SYSCTL_DESCR("Default UDP receive buffer size"),
1.114     atatat   1367:                       NULL, 0, &udp_recvspace, 0,
                   1368:                       CTL_NET, PF_INET, IPPROTO_UDP, UDPCTL_RECVSPACE,
                   1369:                       CTL_EOL);
1.125     thorpej  1370:        sysctl_createv(clog, 0, NULL, NULL,
                   1371:                       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
                   1372:                       CTLTYPE_INT, "do_loopback_cksum",
                   1373:                       SYSCTL_DESCR("Perform UDP checksum on loopback"),
                   1374:                       NULL, 0, &udp_do_loopback_cksum, 0,
                   1375:                       CTL_NET, PF_INET, IPPROTO_UDP, UDPCTL_LOOPBACKCKSUM,
                   1376:                       CTL_EOL);
1.132     atatat   1377:        sysctl_createv(clog, 0, NULL, NULL,
                   1378:                       CTLFLAG_PERMANENT,
1.134     atatat   1379:                       CTLTYPE_STRUCT, "pcblist",
1.132     atatat   1380:                       SYSCTL_DESCR("UDP protocol control block list"),
                   1381:                       sysctl_inpcblist, 0, &udbtable, 0,
                   1382:                       CTL_NET, PF_INET, IPPROTO_UDP, CTL_CREATE,
                   1383:                       CTL_EOL);
1.139     elad     1384:        sysctl_createv(clog, 0, NULL, NULL,
                   1385:                       CTLFLAG_PERMANENT,
                   1386:                       CTLTYPE_STRUCT, "stats",
                   1387:                       SYSCTL_DESCR("UDP statistics"),
                   1388:                       NULL, 0, &udpstat, sizeof(udpstat),
                   1389:                       CTL_NET, PF_INET, IPPROTO_UDP, UDPCTL_STATS,
                   1390:                       CTL_EOL);
1.1       cgd      1391: }
1.72      itojun   1392: #endif
1.130     manu     1393:
                   1394: #if (defined INET && defined IPSEC_NAT_T)
                   1395: /*
                   1396:  * Returns:
                   1397:  * 1 if the packet was processed
                   1398:  * 0 if normal UDP processing should take place
                   1399:  */
                   1400: static int
                   1401: udp4_espinudp(m, off, src, so)
                   1402:        struct mbuf *m;
                   1403:        int off;
                   1404:        struct sockaddr *src;
                   1405:        struct socket *so;
                   1406: {
                   1407:        size_t len;
                   1408:        caddr_t data;
                   1409:        struct inpcb *inp;
                   1410:        size_t skip = 0;
                   1411:        size_t minlen;
                   1412:        size_t iphdrlen;
                   1413:        struct ip *ip;
                   1414:        struct mbuf *n;
1.136     manu     1415:        struct m_tag *tag;
                   1416:        struct udphdr *udphdr;
                   1417:        u_int16_t sport, dport;
1.130     manu     1418:
1.131     perry    1419:        /*
1.130     manu     1420:         * Collapse the mbuf chain if the first mbuf is too short
                   1421:         * The longest case is: UDP + non ESP marker + ESP
                   1422:         */
                   1423:        minlen = off + sizeof(u_int64_t) + sizeof(struct esp);
                   1424:        if (minlen > m->m_pkthdr.len)
                   1425:                minlen = m->m_pkthdr.len;
                   1426:
                   1427:        if (m->m_len < minlen) {
                   1428:                if ((m = m_pullup(m, minlen)) == NULL) {
                   1429:                        printf("udp4_espinudp: m_pullup failed\n");
                   1430:                        return 0;
                   1431:                }
                   1432:        }
                   1433:
1.131     perry    1434:        len = m->m_len - off;
1.130     manu     1435:        data = mtod(m, caddr_t) + off;
                   1436:        inp = sotoinpcb(so);
                   1437:
                   1438:        /* Ignore keepalive packets */
                   1439:        if ((len == 1) && (data[0] == '\xff')) {
                   1440:                return 1;
                   1441:        }
                   1442:
1.131     perry    1443:        /*
                   1444:         * Check that the payload is long enough to hold
1.130     manu     1445:         * an ESP header and compute the length of encapsulation
1.131     perry    1446:         * header to remove
1.130     manu     1447:         */
                   1448:        if (inp->inp_flags & INP_ESPINUDP) {
                   1449:                u_int32_t *st = (u_int32_t *)data;
                   1450:
                   1451:                if ((len <= sizeof(struct esp)) || (*st == 0))
                   1452:                        return 0; /* Normal UDP processing */
                   1453:
                   1454:                skip = sizeof(struct udphdr);
                   1455:        }
                   1456:
                   1457:        if (inp->inp_flags & INP_ESPINUDP_NON_IKE) {
                   1458:                u_int64_t *st = (u_int64_t *)data;
                   1459:
                   1460:                if ((len <= sizeof(u_int64_t) + sizeof(struct esp))
                   1461:                    || (*st != 0))
                   1462:                        return 0; /* Normal UDP processing */
1.131     perry    1463:
1.130     manu     1464:                skip = sizeof(struct udphdr) + sizeof(u_int64_t);
                   1465:        }
                   1466:
                   1467:        /*
1.136     manu     1468:         * Get the UDP ports. They are handled in network
                   1469:         * order everywhere in IPSEC_NAT_T code.
                   1470:         */
                   1471:        udphdr = (struct udphdr *)(data - skip);
                   1472:        sport = udphdr->uh_sport;
                   1473:        dport = udphdr->uh_dport;
                   1474:
                   1475:        /*
1.130     manu     1476:         * Remove the UDP header (and possibly the non ESP marker)
                   1477:         * IP header lendth is iphdrlen
1.131     perry    1478:         * Before:
1.130     manu     1479:         *   <--- off --->
                   1480:         *   +----+------+-----+
                   1481:         *   | IP |  UDP | ESP |
                   1482:         *   +----+------+-----+
                   1483:         *        <-skip->
                   1484:         * After:
                   1485:         *          +----+-----+
                   1486:         *          | IP | ESP |
                   1487:         *          +----+-----+
                   1488:         *   <-skip->
                   1489:         */
                   1490:        iphdrlen = off - sizeof(struct udphdr);
                   1491:        memmove(mtod(m, caddr_t) + skip, mtod(m, caddr_t), iphdrlen);
                   1492:        m_adj(m, skip);
                   1493:
                   1494:        ip = mtod(m, struct ip *);
                   1495:        ip->ip_len = htons(ntohs(ip->ip_len) - skip);
                   1496:        ip->ip_p = IPPROTO_ESP;
                   1497:
                   1498:        /*
1.131     perry    1499:         * Copy the mbuf to avoid multiple free, as both
                   1500:         * esp4_input (which we call) and udp_input (which
1.130     manu     1501:         * called us) free the mbuf.
                   1502:         */
                   1503:        if ((n = m_dup(m, 0, M_COPYALL, M_DONTWAIT)) == NULL) {
                   1504:                printf("udp4_espinudp: m_dup failed\n");
                   1505:                return 0;
                   1506:        }
                   1507:
1.136     manu     1508:        /*
                   1509:         * Add a PACKET_TAG_IPSEC_NAT_T_PORT tag to remember
                   1510:         * the source UDP port. This is required if we want
                   1511:         * to select the right SPD for multiple hosts behind
                   1512:         * same NAT
                   1513:         */
1.137     manu     1514:        if ((tag = m_tag_get(PACKET_TAG_IPSEC_NAT_T_PORTS,
                   1515:            sizeof(sport) + sizeof(dport), M_DONTWAIT)) == NULL) {
                   1516:                printf("udp4_espinudp: m_tag_get failed\n");
1.138     manu     1517:                m_freem(n);
1.137     manu     1518:                return 0;
                   1519:        }
1.136     manu     1520:        ((u_int16_t *)(tag + 1))[0] = sport;
                   1521:        ((u_int16_t *)(tag + 1))[1] = dport;
                   1522:        m_tag_prepend(n, tag);
                   1523:
1.130     manu     1524:        esp4_input(n, iphdrlen);
                   1525:
                   1526:        /* We handled it, it shoudln't be handled by UDP */
                   1527:        return 1;
                   1528: }
                   1529: #endif

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