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Annotation of src/sys/netinet/udp_usrreq.c, Revision 1.116.2.3

1.116.2.3! tron        1: /*     $NetBSD$        */
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>
1.116.2.3! tron       64: __KERNEL_RCSID(0, "$NetBSD$");
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:
1.53      itojun     98: #ifdef INET6
                     99: #include <netinet/ip6.h>
                    100: #include <netinet/icmp6.h>
                    101: #include <netinet6/ip6_var.h>
                    102: #include <netinet6/in6_pcb.h>
                    103: #include <netinet6/udp6_var.h>
                    104: #endif
                    105:
                    106: #ifndef INET6
                    107: /* always need ip6.h for IP6_EXTHDR_GET */
                    108: #include <netinet/ip6.h>
                    109: #endif
                    110:
1.76      itojun    111: #include "faith.h"
                    112: #if defined(NFAITH) && NFAITH > 0
                    113: #include <net/if_faith.h>
                    114: #endif
                    115:
1.27      christos  116: #include <machine/stdarg.h>
                    117:
1.105     jonathan  118: #ifdef FAST_IPSEC
                    119: #include <netipsec/ipsec.h>
1.116.2.3! tron      120: #include <netipsec/ipsec_var.h>                        /* XXX ipsecstat namespace */
1.105     jonathan  121: #ifdef INET6
                    122: #include <netipsec/ipsec6.h>
                    123: #endif
                    124: #endif /* FAST_IPSEC*/
                    125:
1.48      itojun    126: #ifdef IPSEC
                    127: #include <netinet6/ipsec.h>
                    128: #include <netkey/key.h>
                    129: #endif /*IPSEC*/
                    130:
1.64      ws        131: #ifdef IPKDB
                    132: #include <ipkdb/ipkdb.h>
                    133: #endif
                    134:
1.8       mycroft   135: /*
                    136:  * UDP protocol implementation.
                    137:  * Per RFC 768, August, 1980.
                    138:  */
                    139: #ifndef        COMPAT_42
                    140: int    udpcksum = 1;
                    141: #else
                    142: int    udpcksum = 0;           /* XXX */
                    143: #endif
1.93      matt      144:
                    145: struct inpcbtable udbtable;
                    146: struct udpstat udpstat;
1.8       mycroft   147:
1.72      itojun    148: #ifdef INET
1.53      itojun    149: static void udp4_sendup __P((struct mbuf *, int, struct sockaddr *,
                    150:        struct socket *));
                    151: static int udp4_realinput __P((struct sockaddr_in *, struct sockaddr_in *,
                    152:        struct mbuf *, int));
1.72      itojun    153: #endif
1.53      itojun    154: #ifdef INET6
                    155: static void udp6_sendup __P((struct mbuf *, int, struct sockaddr *,
                    156:        struct socket *));
                    157: static int udp6_realinput __P((int, struct sockaddr_in6 *,
                    158:        struct sockaddr_in6 *, struct mbuf *, int));
                    159: #endif
1.72      itojun    160: #ifdef INET
1.13      mycroft   161: static void udp_notify __P((struct inpcb *, int));
1.72      itojun    162: #endif
1.7       mycroft   163:
1.26      mycroft   164: #ifndef UDBHASHSIZE
                    165: #define        UDBHASHSIZE     128
                    166: #endif
                    167: int    udbhashsize = UDBHASHSIZE;
                    168:
1.98      matt      169: #ifdef MBUFTRACE
                    170: struct mowner udp_mowner = { "udp" };
                    171: struct mowner udp_rx_mowner = { "udp", "rx" };
                    172: struct mowner udp_tx_mowner = { "udp", "tx" };
                    173: #endif
                    174:
1.78      thorpej   175: #ifdef UDP_CSUM_COUNTERS
                    176: #include <sys/device.h>
                    177:
                    178: struct evcnt udp_hwcsum_bad = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
                    179:     NULL, "udp", "hwcsum bad");
                    180: struct evcnt udp_hwcsum_ok = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
                    181:     NULL, "udp", "hwcsum ok");
                    182: struct evcnt udp_hwcsum_data = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
                    183:     NULL, "udp", "hwcsum data");
                    184: struct evcnt udp_swcsum = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
                    185:     NULL, "udp", "swcsum");
                    186:
                    187: #define        UDP_CSUM_COUNTER_INCR(ev)       (ev)->ev_count++
                    188:
                    189: #else
                    190:
                    191: #define        UDP_CSUM_COUNTER_INCR(ev)       /* nothing */
                    192:
                    193: #endif /* UDP_CSUM_COUNTERS */
                    194:
1.7       mycroft   195: void
1.1       cgd       196: udp_init()
                    197: {
1.18      mycroft   198:
1.35      mycroft   199:        in_pcbinit(&udbtable, udbhashsize, udbhashsize);
1.78      thorpej   200:
                    201: #ifdef UDP_CSUM_COUNTERS
                    202:        evcnt_attach_static(&udp_hwcsum_bad);
                    203:        evcnt_attach_static(&udp_hwcsum_ok);
                    204:        evcnt_attach_static(&udp_hwcsum_data);
                    205:        evcnt_attach_static(&udp_swcsum);
                    206: #endif /* UDP_CSUM_COUNTERS */
1.98      matt      207:
                    208:        MOWNER_ATTACH(&udp_tx_mowner);
                    209:        MOWNER_ATTACH(&udp_rx_mowner);
                    210:        MOWNER_ATTACH(&udp_mowner);
1.1       cgd       211: }
                    212:
1.72      itojun    213: #ifdef INET
1.7       mycroft   214: void
1.27      christos  215: #if __STDC__
                    216: udp_input(struct mbuf *m, ...)
                    217: #else
                    218: udp_input(m, va_alist)
                    219:        struct mbuf *m;
                    220:        va_dcl
                    221: #endif
1.1       cgd       222: {
1.53      itojun    223:        va_list ap;
                    224:        struct sockaddr_in src, dst;
                    225:        struct ip *ip;
                    226:        struct udphdr *uh;
1.97      simonb    227:        int iphlen;
1.53      itojun    228:        int len;
                    229:        int n;
1.96      itojun    230:        u_int16_t ip_len;
1.53      itojun    231:
                    232:        va_start(ap, m);
                    233:        iphlen = va_arg(ap, int);
1.97      simonb    234:        (void)va_arg(ap, int);          /* ignore value, advance ap */
1.53      itojun    235:        va_end(ap);
                    236:
1.98      matt      237:        MCLAIM(m, &udp_rx_mowner);
1.53      itojun    238:        udpstat.udps_ipackets++;
                    239:
                    240:        /*
                    241:         * Get IP and UDP header together in first mbuf.
                    242:         */
                    243:        ip = mtod(m, struct ip *);
                    244:        IP6_EXTHDR_GET(uh, struct udphdr *, m, iphlen, sizeof(struct udphdr));
                    245:        if (uh == NULL) {
                    246:                udpstat.udps_hdrops++;
                    247:                return;
                    248:        }
1.95      thorpej   249:        KASSERT(UDP_HDR_ALIGNED_P(uh));
1.53      itojun    250:
1.57      itojun    251:        /* destination port of 0 is illegal, based on RFC768. */
                    252:        if (uh->uh_dport == 0)
                    253:                goto bad;
                    254:
1.53      itojun    255:        /*
                    256:         * Make mbuf data length reflect UDP length.
                    257:         * If not enough data to reflect UDP length, drop.
                    258:         */
1.96      itojun    259:        ip_len = ntohs(ip->ip_len);
1.53      itojun    260:        len = ntohs((u_int16_t)uh->uh_ulen);
1.96      itojun    261:        if (ip_len != iphlen + len) {
                    262:                if (ip_len < iphlen + len || len < sizeof(struct udphdr)) {
1.53      itojun    263:                        udpstat.udps_badlen++;
                    264:                        goto bad;
                    265:                }
1.96      itojun    266:                m_adj(m, iphlen + len - ip_len);
1.53      itojun    267:        }
                    268:
                    269:        /*
                    270:         * Checksum extended UDP header and data.
                    271:         */
                    272:        if (uh->uh_sum) {
1.78      thorpej   273:                switch (m->m_pkthdr.csum_flags &
1.112     enami     274:                    ((m->m_pkthdr.rcvif->if_csum_flags_rx & M_CSUM_UDPv4) |
                    275:                    M_CSUM_TCP_UDP_BAD | M_CSUM_DATA)) {
1.78      thorpej   276:                case M_CSUM_UDPv4|M_CSUM_TCP_UDP_BAD:
                    277:                        UDP_CSUM_COUNTER_INCR(&udp_hwcsum_bad);
                    278:                        goto badcsum;
                    279:
1.106     jonathan  280:                case M_CSUM_UDPv4|M_CSUM_DATA: {
                    281:                        u_int32_t hw_csum = m->m_pkthdr.csum_data;
1.78      thorpej   282:                        UDP_CSUM_COUNTER_INCR(&udp_hwcsum_data);
1.106     jonathan  283:                        if (m->m_pkthdr.csum_flags & M_CSUM_NO_PSEUDOHDR)
1.112     enami     284:                                hw_csum = in_cksum_phdr(ip->ip_src.s_addr,
                    285:                                    ip->ip_dst.s_addr,
1.115     drochner  286:                                    htons(hw_csum + len + IPPROTO_UDP));
1.106     jonathan  287:                        if ((hw_csum ^ 0xffff) != 0)
1.78      thorpej   288:                                goto badcsum;
                    289:                        break;
1.106     jonathan  290:                }
1.78      thorpej   291:
                    292:                case M_CSUM_UDPv4:
                    293:                        /* Checksum was okay. */
                    294:                        UDP_CSUM_COUNTER_INCR(&udp_hwcsum_ok);
                    295:                        break;
                    296:
                    297:                default:
                    298:                        /* Need to compute it ourselves. */
                    299:                        UDP_CSUM_COUNTER_INCR(&udp_swcsum);
                    300:                        if (in4_cksum(m, IPPROTO_UDP, iphlen, len) != 0)
                    301:                                goto badcsum;
                    302:                        break;
1.53      itojun    303:                }
                    304:        }
                    305:
                    306:        /* construct source and dst sockaddrs. */
                    307:        bzero(&src, sizeof(src));
                    308:        src.sin_family = AF_INET;
                    309:        src.sin_len = sizeof(struct sockaddr_in);
                    310:        bcopy(&ip->ip_src, &src.sin_addr, sizeof(src.sin_addr));
                    311:        src.sin_port = uh->uh_sport;
                    312:        bzero(&dst, sizeof(dst));
                    313:        dst.sin_family = AF_INET;
                    314:        dst.sin_len = sizeof(struct sockaddr_in);
                    315:        bcopy(&ip->ip_dst, &dst.sin_addr, sizeof(dst.sin_addr));
                    316:        dst.sin_port = uh->uh_dport;
                    317:
                    318:        n = udp4_realinput(&src, &dst, m, iphlen);
                    319: #ifdef INET6
                    320:        if (IN_MULTICAST(ip->ip_dst.s_addr) || n == 0) {
                    321:                struct sockaddr_in6 src6, dst6;
                    322:
                    323:                bzero(&src6, sizeof(src6));
                    324:                src6.sin6_family = AF_INET6;
                    325:                src6.sin6_len = sizeof(struct sockaddr_in6);
                    326:                src6.sin6_addr.s6_addr[10] = src6.sin6_addr.s6_addr[11] = 0xff;
                    327:                bcopy(&ip->ip_src, &src6.sin6_addr.s6_addr[12],
                    328:                        sizeof(ip->ip_src));
                    329:                src6.sin6_port = uh->uh_sport;
                    330:                bzero(&dst6, sizeof(dst6));
                    331:                dst6.sin6_family = AF_INET6;
                    332:                dst6.sin6_len = sizeof(struct sockaddr_in6);
                    333:                dst6.sin6_addr.s6_addr[10] = dst6.sin6_addr.s6_addr[11] = 0xff;
                    334:                bcopy(&ip->ip_dst, &dst6.sin6_addr.s6_addr[12],
                    335:                        sizeof(ip->ip_dst));
                    336:                dst6.sin6_port = uh->uh_dport;
                    337:
                    338:                n += udp6_realinput(AF_INET, &src6, &dst6, m, iphlen);
                    339:        }
                    340: #endif
                    341:
                    342:        if (n == 0) {
                    343:                if (m->m_flags & (M_BCAST | M_MCAST)) {
                    344:                        udpstat.udps_noportbcast++;
                    345:                        goto bad;
                    346:                }
1.61      itojun    347:                udpstat.udps_noport++;
1.64      ws        348: #ifdef IPKDB
1.53      itojun    349:                if (checkipkdb(&ip->ip_src, uh->uh_sport, uh->uh_dport,
                    350:                                m, iphlen + sizeof(struct udphdr),
                    351:                                m->m_pkthdr.len - iphlen - sizeof(struct udphdr))) {
                    352:                        /*
                    353:                         * It was a debugger connect packet,
                    354:                         * just drop it now
                    355:                         */
                    356:                        goto bad;
                    357:                }
                    358: #endif
                    359:                icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0);
                    360:                m = NULL;
                    361:        }
                    362:
                    363: bad:
                    364:        if (m)
                    365:                m_freem(m);
1.78      thorpej   366:        return;
                    367:
                    368: badcsum:
                    369:        m_freem(m);
                    370:        udpstat.udps_badsum++;
1.53      itojun    371: }
1.72      itojun    372: #endif
1.53      itojun    373:
                    374: #ifdef INET6
                    375: int
                    376: udp6_input(mp, offp, proto)
                    377:        struct mbuf **mp;
                    378:        int *offp, proto;
                    379: {
                    380:        struct mbuf *m = *mp;
                    381:        int off = *offp;
                    382:        struct sockaddr_in6 src, dst;
                    383:        struct ip6_hdr *ip6;
                    384:        struct udphdr *uh;
                    385:        u_int32_t plen, ulen;
                    386:
1.76      itojun    387:        ip6 = mtod(m, struct ip6_hdr *);
                    388:
1.53      itojun    389: #if defined(NFAITH) && 0 < NFAITH
1.76      itojun    390:        if (faithprefix(&ip6->ip6_dst)) {
                    391:                /* send icmp6 host unreach? */
                    392:                m_freem(m);
                    393:                return IPPROTO_DONE;
1.53      itojun    394:        }
                    395: #endif
                    396:
                    397:        udp6stat.udp6s_ipackets++;
                    398:
                    399:        /* check for jumbogram is done in ip6_input.  we can trust pkthdr.len */
                    400:        plen = m->m_pkthdr.len - off;
                    401:        IP6_EXTHDR_GET(uh, struct udphdr *, m, off, sizeof(struct udphdr));
                    402:        if (uh == NULL) {
                    403:                ip6stat.ip6s_tooshort++;
                    404:                return IPPROTO_DONE;
                    405:        }
1.95      thorpej   406:        KASSERT(UDP_HDR_ALIGNED_P(uh));
1.53      itojun    407:        ulen = ntohs((u_short)uh->uh_ulen);
1.69      itojun    408:        /*
                    409:         * RFC2675 section 4: jumbograms will have 0 in the UDP header field,
                    410:         * iff payload length > 0xffff.
                    411:         */
1.53      itojun    412:        if (ulen == 0 && plen > 0xffff)
                    413:                ulen = plen;
                    414:
                    415:        if (plen != ulen) {
                    416:                udp6stat.udp6s_badlen++;
1.54      itojun    417:                goto bad;
                    418:        }
                    419:
1.57      itojun    420:        /* destination port of 0 is illegal, based on RFC768. */
                    421:        if (uh->uh_dport == 0)
                    422:                goto bad;
                    423:
1.54      itojun    424:        /* Be proactive about malicious use of IPv4 mapped address */
                    425:        if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
                    426:            IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
                    427:                /* XXX stat */
1.53      itojun    428:                goto bad;
                    429:        }
                    430:
                    431:        /*
                    432:         * Checksum extended UDP header and data.
                    433:         */
1.116.2.1  tron      434:        if (uh->uh_sum == 0) {
1.53      itojun    435:                udp6stat.udp6s_nosum++;
1.116.2.1  tron      436:                goto bad;
1.116.2.2  tron      437:        }
                    438:        if (in6_cksum(m, IPPROTO_UDP, off, ulen) != 0) {
1.53      itojun    439:                udp6stat.udp6s_badsum++;
                    440:                goto bad;
                    441:        }
                    442:
                    443:        /*
                    444:         * Construct source and dst sockaddrs.
                    445:         * Note that ifindex (s6_addr16[1]) is already filled.
                    446:         */
                    447:        bzero(&src, sizeof(src));
                    448:        src.sin6_family = AF_INET6;
                    449:        src.sin6_len = sizeof(struct sockaddr_in6);
1.69      itojun    450:        /* KAME hack: recover scopeid */
                    451:        (void)in6_recoverscope(&src, &ip6->ip6_src, m->m_pkthdr.rcvif);
1.53      itojun    452:        src.sin6_port = uh->uh_sport;
                    453:        bzero(&dst, sizeof(dst));
                    454:        dst.sin6_family = AF_INET6;
                    455:        dst.sin6_len = sizeof(struct sockaddr_in6);
1.69      itojun    456:        /* KAME hack: recover scopeid */
                    457:        (void)in6_recoverscope(&dst, &ip6->ip6_dst, m->m_pkthdr.rcvif);
1.53      itojun    458:        dst.sin6_port = uh->uh_dport;
                    459:
                    460:        if (udp6_realinput(AF_INET6, &src, &dst, m, off) == 0) {
                    461:                if (m->m_flags & M_MCAST) {
                    462:                        udp6stat.udp6s_noportmcast++;
                    463:                        goto bad;
                    464:                }
1.61      itojun    465:                udp6stat.udp6s_noport++;
1.53      itojun    466:                icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0);
                    467:                m = NULL;
                    468:        }
                    469:
                    470: bad:
                    471:        if (m)
                    472:                m_freem(m);
                    473:        return IPPROTO_DONE;
                    474: }
                    475: #endif
                    476:
1.72      itojun    477: #ifdef INET
1.53      itojun    478: static void
                    479: udp4_sendup(m, off, src, so)
                    480:        struct mbuf *m;
                    481:        int off;        /* offset of data portion */
                    482:        struct sockaddr *src;
                    483:        struct socket *so;
                    484: {
                    485:        struct mbuf *opts = NULL;
                    486:        struct mbuf *n;
                    487:        struct inpcb *inp = NULL;
                    488:
                    489:        if (!so)
                    490:                return;
                    491:        switch (so->so_proto->pr_domain->dom_family) {
                    492:        case AF_INET:
                    493:                inp = sotoinpcb(so);
                    494:                break;
                    495: #ifdef INET6
                    496:        case AF_INET6:
                    497:                break;
                    498: #endif
                    499:        default:
                    500:                return;
                    501:        }
                    502:
1.105     jonathan  503: #if defined(IPSEC) || defined(FAST_IPSEC)
1.53      itojun    504:        /* check AH/ESP integrity. */
                    505:        if (so != NULL && ipsec4_in_reject_so(m, so)) {
                    506:                ipsecstat.in_polvio++;
1.110     itojun    507:                if ((n = m_copy(m, 0, M_COPYALL)) != NULL)
                    508:                        icmp_error(n, ICMP_UNREACH, ICMP_UNREACH_ADMIN_PROHIBIT,
                    509:                            0, 0);
1.53      itojun    510:                return;
                    511:        }
                    512: #endif /*IPSEC*/
                    513:
                    514:        if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
                    515:                if (inp && (inp->inp_flags & INP_CONTROLOPTS
                    516:                         || so->so_options & SO_TIMESTAMP)) {
                    517:                        struct ip *ip = mtod(n, struct ip *);
                    518:                        ip_savecontrol(inp, &opts, ip, n);
                    519:                }
                    520:
                    521:                m_adj(n, off);
                    522:                if (sbappendaddr(&so->so_rcv, src, n,
                    523:                                opts) == 0) {
                    524:                        m_freem(n);
                    525:                        if (opts)
                    526:                                m_freem(opts);
1.81      enami     527:                        udpstat.udps_fullsock++;
1.53      itojun    528:                } else
                    529:                        sorwakeup(so);
                    530:        }
                    531: }
1.72      itojun    532: #endif
1.53      itojun    533:
                    534: #ifdef INET6
                    535: static void
                    536: udp6_sendup(m, off, src, so)
                    537:        struct mbuf *m;
                    538:        int off;        /* offset of data portion */
                    539:        struct sockaddr *src;
                    540:        struct socket *so;
                    541: {
                    542:        struct mbuf *opts = NULL;
                    543:        struct mbuf *n;
                    544:        struct in6pcb *in6p = NULL;
                    545:
                    546:        if (!so)
                    547:                return;
                    548:        if (so->so_proto->pr_domain->dom_family != AF_INET6)
                    549:                return;
                    550:        in6p = sotoin6pcb(so);
                    551:
1.105     jonathan  552: #if defined(IPSEC) || defined(FAST_IPSEC)
1.53      itojun    553:        /* check AH/ESP integrity. */
                    554:        if (so != NULL && ipsec6_in_reject_so(m, so)) {
                    555:                ipsec6stat.in_polvio++;
1.111     mycroft   556:                if ((n = m_copy(m, 0, M_COPYALL)) != NULL)
1.110     itojun    557:                        icmp6_error(n, ICMP6_DST_UNREACH,
                    558:                            ICMP6_DST_UNREACH_ADMIN, 0);
1.53      itojun    559:                return;
                    560:        }
                    561: #endif /*IPSEC*/
                    562:
                    563:        if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
                    564:                if (in6p && (in6p->in6p_flags & IN6P_CONTROLOPTS
                    565:                          || in6p->in6p_socket->so_options & SO_TIMESTAMP)) {
                    566:                        struct ip6_hdr *ip6 = mtod(n, struct ip6_hdr *);
                    567:                        ip6_savecontrol(in6p, &opts, ip6, n);
                    568:                }
                    569:
                    570:                m_adj(n, off);
                    571:                if (sbappendaddr(&so->so_rcv, src, n, opts) == 0) {
                    572:                        m_freem(n);
                    573:                        if (opts)
                    574:                                m_freem(opts);
                    575:                        udp6stat.udp6s_fullsock++;
                    576:                } else
                    577:                        sorwakeup(so);
                    578:        }
                    579: }
                    580: #endif
                    581:
1.72      itojun    582: #ifdef INET
1.53      itojun    583: static int
                    584: udp4_realinput(src, dst, m, off)
                    585:        struct sockaddr_in *src;
                    586:        struct sockaddr_in *dst;
                    587:        struct mbuf *m;
                    588:        int off;        /* offset of udphdr */
                    589: {
                    590:        u_int16_t *sport, *dport;
                    591:        int rcvcnt;
                    592:        struct in_addr *src4, *dst4;
1.109     itojun    593:        struct inpcb_hdr *inph;
1.53      itojun    594:        struct inpcb *inp;
                    595:
                    596:        rcvcnt = 0;
                    597:        off += sizeof(struct udphdr);   /* now, offset of payload */
                    598:
                    599:        if (src->sin_family != AF_INET || dst->sin_family != AF_INET)
                    600:                goto bad;
                    601:
                    602:        src4 = &src->sin_addr;
                    603:        sport = &src->sin_port;
                    604:        dst4 = &dst->sin_addr;
                    605:        dport = &dst->sin_port;
                    606:
1.73      itojun    607:        if (IN_MULTICAST(dst4->s_addr) ||
1.53      itojun    608:            in_broadcast(*dst4, m->m_pkthdr.rcvif)) {
                    609:                /*
                    610:                 * Deliver a multicast or broadcast datagram to *all* sockets
                    611:                 * for which the local and remote addresses and ports match
                    612:                 * those of the incoming datagram.  This allows more than
                    613:                 * one process to receive multi/broadcasts on the same port.
                    614:                 * (This really ought to be done for unicast datagrams as
                    615:                 * well, but that would cause problems with existing
                    616:                 * applications that open both address-specific sockets and
                    617:                 * a wildcard socket listening to the same port -- they would
                    618:                 * end up receiving duplicates of every unicast datagram.
                    619:                 * Those applications open the multiple sockets to overcome an
                    620:                 * inadequacy of the UDP socket interface, but for backwards
                    621:                 * compatibility we avoid the problem here rather than
                    622:                 * fixing the interface.  Maybe 4.5BSD will remedy this?)
                    623:                 */
                    624:
                    625:                /*
1.92      itojun    626:                 * KAME note: traditionally we dropped udpiphdr from mbuf here.
1.71      itojun    627:                 * we need udpiphdr for IPsec processing so we do that later.
1.53      itojun    628:                 */
                    629:                /*
                    630:                 * Locate pcb(s) for datagram.
                    631:                 */
1.109     itojun    632:                CIRCLEQ_FOREACH(inph, &udbtable.inpt_queue, inph_queue) {
                    633:                        inp = (struct inpcb *)inph;
                    634:                        if (inp->inp_af != AF_INET)
                    635:                                continue;
                    636:
1.53      itojun    637:                        if (inp->inp_lport != *dport)
                    638:                                continue;
                    639:                        if (!in_nullhost(inp->inp_laddr)) {
                    640:                                if (!in_hosteq(inp->inp_laddr, *dst4))
                    641:                                        continue;
                    642:                        }
                    643:                        if (!in_nullhost(inp->inp_faddr)) {
                    644:                                if (!in_hosteq(inp->inp_faddr, *src4) ||
                    645:                                    inp->inp_fport != *sport)
                    646:                                        continue;
                    647:                        }
                    648:
                    649:                        udp4_sendup(m, off, (struct sockaddr *)src,
                    650:                                inp->inp_socket);
                    651:                        rcvcnt++;
                    652:
                    653:                        /*
                    654:                         * Don't look for additional matches if this one does
                    655:                         * not have either the SO_REUSEPORT or SO_REUSEADDR
                    656:                         * socket options set.  This heuristic avoids searching
                    657:                         * through all pcbs in the common case of a non-shared
                    658:                         * port.  It assumes that an application will never
                    659:                         * clear these options after setting them.
                    660:                         */
                    661:                        if ((inp->inp_socket->so_options &
                    662:                            (SO_REUSEPORT|SO_REUSEADDR)) == 0)
                    663:                                break;
                    664:                }
                    665:        } else {
                    666:                /*
                    667:                 * Locate pcb for datagram.
                    668:                 */
                    669:                inp = in_pcblookup_connect(&udbtable, *src4, *sport, *dst4, *dport);
                    670:                if (inp == 0) {
                    671:                        ++udpstat.udps_pcbhashmiss;
                    672:                        inp = in_pcblookup_bind(&udbtable, *dst4, *dport);
1.82      itojun    673:                        if (inp == 0)
1.53      itojun    674:                                return rcvcnt;
                    675:                }
                    676:
                    677:                udp4_sendup(m, off, (struct sockaddr *)src, inp->inp_socket);
                    678:                rcvcnt++;
                    679:        }
                    680:
                    681: bad:
                    682:        return rcvcnt;
                    683: }
1.72      itojun    684: #endif
1.53      itojun    685:
                    686: #ifdef INET6
                    687: static int
                    688: udp6_realinput(af, src, dst, m, off)
                    689:        int af;         /* af on packet */
                    690:        struct sockaddr_in6 *src;
                    691:        struct sockaddr_in6 *dst;
                    692:        struct mbuf *m;
                    693:        int off;        /* offset of udphdr */
                    694: {
1.79      itojun    695:        u_int16_t sport, dport;
1.53      itojun    696:        int rcvcnt;
1.79      itojun    697:        struct in6_addr src6, dst6;
                    698:        const struct in_addr *dst4;
1.109     itojun    699:        struct inpcb_hdr *inph;
1.53      itojun    700:        struct in6pcb *in6p;
                    701:
                    702:        rcvcnt = 0;
                    703:        off += sizeof(struct udphdr);   /* now, offset of payload */
                    704:
                    705:        if (af != AF_INET && af != AF_INET6)
                    706:                goto bad;
                    707:        if (src->sin6_family != AF_INET6 || dst->sin6_family != AF_INET6)
                    708:                goto bad;
                    709:
1.79      itojun    710:        in6_embedscope(&src6, src, NULL, NULL);
                    711:        sport = src->sin6_port;
                    712:        in6_embedscope(&dst6, dst, NULL, NULL);
                    713:        dport = dst->sin6_port;
1.88      itojun    714:        dst4 = (struct in_addr *)&dst->sin6_addr.s6_addr[12];
1.53      itojun    715:
1.79      itojun    716:        if (IN6_IS_ADDR_MULTICAST(&dst6) ||
                    717:            (af == AF_INET && IN_MULTICAST(dst4->s_addr))) {
1.53      itojun    718:                /*
                    719:                 * Deliver a multicast or broadcast datagram to *all* sockets
                    720:                 * for which the local and remote addresses and ports match
                    721:                 * those of the incoming datagram.  This allows more than
                    722:                 * one process to receive multi/broadcasts on the same port.
                    723:                 * (This really ought to be done for unicast datagrams as
                    724:                 * well, but that would cause problems with existing
                    725:                 * applications that open both address-specific sockets and
                    726:                 * a wildcard socket listening to the same port -- they would
                    727:                 * end up receiving duplicates of every unicast datagram.
                    728:                 * Those applications open the multiple sockets to overcome an
                    729:                 * inadequacy of the UDP socket interface, but for backwards
                    730:                 * compatibility we avoid the problem here rather than
                    731:                 * fixing the interface.  Maybe 4.5BSD will remedy this?)
                    732:                 */
                    733:
                    734:                /*
1.92      itojun    735:                 * KAME note: traditionally we dropped udpiphdr from mbuf here.
1.71      itojun    736:                 * we need udpiphdr for IPsec processing so we do that later.
1.53      itojun    737:                 */
                    738:                /*
                    739:                 * Locate pcb(s) for datagram.
                    740:                 */
1.109     itojun    741:                CIRCLEQ_FOREACH(inph, &udbtable.inpt_queue, inph_queue) {
                    742:                        in6p = (struct in6pcb *)inph;
                    743:                        if (in6p->in6p_af != AF_INET6)
                    744:                                continue;
                    745:
1.79      itojun    746:                        if (in6p->in6p_lport != dport)
1.53      itojun    747:                                continue;
                    748:                        if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) {
1.90      itojun    749:                                if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &dst6))
1.53      itojun    750:                                        continue;
1.92      itojun    751:                        } else {
1.79      itojun    752:                                if (IN6_IS_ADDR_V4MAPPED(&dst6) &&
1.85      itojun    753:                                    (in6p->in6p_flags & IN6P_IPV6_V6ONLY))
1.55      itojun    754:                                        continue;
                    755:                        }
1.53      itojun    756:                        if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
1.79      itojun    757:                                if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr,
                    758:                                    &src6) || in6p->in6p_fport != sport)
1.53      itojun    759:                                        continue;
1.92      itojun    760:                        } else {
1.79      itojun    761:                                if (IN6_IS_ADDR_V4MAPPED(&src6) &&
1.85      itojun    762:                                    (in6p->in6p_flags & IN6P_IPV6_V6ONLY))
1.55      itojun    763:                                        continue;
                    764:                        }
1.53      itojun    765:
                    766:                        udp6_sendup(m, off, (struct sockaddr *)src,
                    767:                                in6p->in6p_socket);
                    768:                        rcvcnt++;
                    769:
                    770:                        /*
                    771:                         * Don't look for additional matches if this one does
                    772:                         * not have either the SO_REUSEPORT or SO_REUSEADDR
                    773:                         * socket options set.  This heuristic avoids searching
                    774:                         * through all pcbs in the common case of a non-shared
                    775:                         * port.  It assumes that an application will never
                    776:                         * clear these options after setting them.
                    777:                         */
                    778:                        if ((in6p->in6p_socket->so_options &
                    779:                            (SO_REUSEPORT|SO_REUSEADDR)) == 0)
                    780:                                break;
                    781:                }
                    782:        } else {
                    783:                /*
                    784:                 * Locate pcb for datagram.
                    785:                 */
1.109     itojun    786:                in6p = in6_pcblookup_connect(&udbtable, &src6, sport,
1.79      itojun    787:                    &dst6, dport, 0);
1.53      itojun    788:                if (in6p == 0) {
                    789:                        ++udpstat.udps_pcbhashmiss;
1.109     itojun    790:                        in6p = in6_pcblookup_bind(&udbtable, &dst6, dport, 0);
1.82      itojun    791:                        if (in6p == 0)
1.53      itojun    792:                                return rcvcnt;
                    793:                }
                    794:
                    795:                udp6_sendup(m, off, (struct sockaddr *)src, in6p->in6p_socket);
                    796:                rcvcnt++;
                    797:        }
                    798:
                    799: bad:
                    800:        return rcvcnt;
                    801: }
                    802: #endif
1.1       cgd       803:
1.72      itojun    804: #ifdef INET
1.1       cgd       805: /*
                    806:  * Notify a udp user of an asynchronous error;
                    807:  * just wake up so that he can collect error status.
                    808:  */
1.7       mycroft   809: static void
1.1       cgd       810: udp_notify(inp, errno)
1.66      augustss  811:        struct inpcb *inp;
1.7       mycroft   812:        int errno;
1.1       cgd       813: {
1.34      mycroft   814:
1.1       cgd       815:        inp->inp_socket->so_error = errno;
                    816:        sorwakeup(inp->inp_socket);
                    817:        sowwakeup(inp->inp_socket);
                    818: }
                    819:
1.27      christos  820: void *
                    821: udp_ctlinput(cmd, sa, v)
1.1       cgd       822:        int cmd;
                    823:        struct sockaddr *sa;
1.27      christos  824:        void *v;
1.1       cgd       825: {
1.66      augustss  826:        struct ip *ip = v;
                    827:        struct udphdr *uh;
1.18      mycroft   828:        void (*notify) __P((struct inpcb *, int)) = udp_notify;
1.21      mycroft   829:        int errno;
1.1       cgd       830:
1.53      itojun    831:        if (sa->sa_family != AF_INET
                    832:         || sa->sa_len != sizeof(struct sockaddr_in))
1.51      itojun    833:                return NULL;
1.20      mycroft   834:        if ((unsigned)cmd >= PRC_NCMDS)
1.27      christos  835:                return NULL;
1.20      mycroft   836:        errno = inetctlerrmap[cmd];
1.18      mycroft   837:        if (PRC_IS_REDIRECT(cmd))
1.19      mycroft   838:                notify = in_rtchange, ip = 0;
1.18      mycroft   839:        else if (cmd == PRC_HOSTDEAD)
1.19      mycroft   840:                ip = 0;
1.23      cgd       841:        else if (errno == 0)
1.27      christos  842:                return NULL;
1.19      mycroft   843:        if (ip) {
1.1       cgd       844:                uh = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2));
1.34      mycroft   845:                in_pcbnotify(&udbtable, satosin(sa)->sin_addr, uh->uh_dport,
                    846:                    ip->ip_src, uh->uh_sport, errno, notify);
1.53      itojun    847:
                    848:                /* XXX mapped address case */
1.19      mycroft   849:        } else
1.34      mycroft   850:                in_pcbnotifyall(&udbtable, satosin(sa)->sin_addr, errno,
                    851:                    notify);
1.27      christos  852:        return NULL;
1.1       cgd       853: }
                    854:
1.7       mycroft   855: int
1.27      christos  856: #if __STDC__
                    857: udp_output(struct mbuf *m, ...)
                    858: #else
                    859: udp_output(m, va_alist)
                    860:        struct mbuf *m;
                    861:        va_dcl
                    862: #endif
                    863: {
1.66      augustss  864:        struct inpcb *inp;
                    865:        struct udpiphdr *ui;
                    866:        int len = m->m_pkthdr.len;
1.31      mycroft   867:        int error = 0;
1.27      christos  868:        va_list ap;
                    869:
1.98      matt      870:        MCLAIM(m, &udp_tx_mowner);
1.27      christos  871:        va_start(ap, m);
                    872:        inp = va_arg(ap, struct inpcb *);
                    873:        va_end(ap);
1.1       cgd       874:
                    875:        /*
                    876:         * Calculate data length and get a mbuf
                    877:         * for UDP and IP headers.
                    878:         */
1.13      mycroft   879:        M_PREPEND(m, sizeof(struct udpiphdr), M_DONTWAIT);
                    880:        if (m == 0) {
                    881:                error = ENOBUFS;
1.39      thorpej   882:                goto release;
                    883:        }
                    884:
                    885:        /*
                    886:         * Compute the packet length of the IP header, and
                    887:         * punt if the length looks bogus.
                    888:         */
1.96      itojun    889:        if (len + sizeof(struct udpiphdr) > IP_MAXPACKET) {
1.39      thorpej   890:                error = EMSGSIZE;
1.13      mycroft   891:                goto release;
                    892:        }
1.1       cgd       893:
                    894:        /*
                    895:         * Fill in mbuf with extended UDP header
                    896:         * and addresses and length put into network format.
                    897:         */
                    898:        ui = mtod(m, struct udpiphdr *);
                    899:        ui->ui_pr = IPPROTO_UDP;
                    900:        ui->ui_src = inp->inp_laddr;
                    901:        ui->ui_dst = inp->inp_faddr;
                    902:        ui->ui_sport = inp->inp_lport;
                    903:        ui->ui_dport = inp->inp_fport;
1.78      thorpej   904:        ui->ui_ulen = htons((u_int16_t)len + sizeof(struct udphdr));
1.1       cgd       905:
                    906:        /*
1.78      thorpej   907:         * Set up checksum and output datagram.
1.1       cgd       908:         */
                    909:        if (udpcksum) {
1.78      thorpej   910:                /*
                    911:                 * XXX Cache pseudo-header checksum part for
                    912:                 * XXX "connected" UDP sockets.
                    913:                 */
                    914:                ui->ui_sum = in_cksum_phdr(ui->ui_src.s_addr,
                    915:                    ui->ui_dst.s_addr, htons((u_int16_t)len +
                    916:                    sizeof(struct udphdr) + IPPROTO_UDP));
                    917:                m->m_pkthdr.csum_flags = M_CSUM_UDPv4;
                    918:                m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum);
                    919:        } else
                    920:                ui->ui_sum = 0;
1.96      itojun    921:        ((struct ip *)ui)->ip_len = htons(sizeof (struct udpiphdr) + len);
1.1       cgd       922:        ((struct ip *)ui)->ip_ttl = inp->inp_ip.ip_ttl; /* XXX */
                    923:        ((struct ip *)ui)->ip_tos = inp->inp_ip.ip_tos; /* XXX */
                    924:        udpstat.udps_opackets++;
1.48      itojun    925:
1.31      mycroft   926:        return (ip_output(m, inp->inp_options, &inp->inp_route,
1.12      mycroft   927:            inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST),
1.107     itojun    928:            inp->inp_moptions, inp->inp_socket));
1.1       cgd       929:
                    930: release:
                    931:        m_freem(m);
                    932:        return (error);
                    933: }
                    934:
1.42      thorpej   935: int    udp_sendspace = 9216;           /* really max datagram size */
                    936: int    udp_recvspace = 40 * (1024 + sizeof(struct sockaddr_in));
1.1       cgd       937:                                        /* 40 1K datagrams */
                    938:
                    939: /*ARGSUSED*/
1.7       mycroft   940: int
1.103     fvdl      941: udp_usrreq(so, req, m, nam, control, p)
1.1       cgd       942:        struct socket *so;
                    943:        int req;
1.31      mycroft   944:        struct mbuf *m, *nam, *control;
1.103     fvdl      945:        struct proc *p;
1.1       cgd       946: {
1.66      augustss  947:        struct inpcb *inp;
1.1       cgd       948:        int s;
1.66      augustss  949:        int error = 0;
1.1       cgd       950:
                    951:        if (req == PRU_CONTROL)
1.31      mycroft   952:                return (in_control(so, (long)m, (caddr_t)nam,
1.30      mycroft   953:                    (struct ifnet *)control, p));
1.59      thorpej   954:
1.60      thorpej   955:        if (req == PRU_PURGEIF) {
1.80      itojun    956:                in_pcbpurgeif0(&udbtable, (struct ifnet *)control);
1.60      thorpej   957:                in_purgeif((struct ifnet *)control);
                    958:                in_pcbpurgeif(&udbtable, (struct ifnet *)control);
1.59      thorpej   959:                return (0);
                    960:        }
1.31      mycroft   961:
                    962:        s = splsoftnet();
                    963:        inp = sotoinpcb(so);
1.32      mycroft   964: #ifdef DIAGNOSTIC
                    965:        if (req != PRU_SEND && req != PRU_SENDOOB && control)
                    966:                panic("udp_usrreq: unexpected control mbuf");
                    967: #endif
1.31      mycroft   968:        if (inp == 0 && req != PRU_ATTACH) {
                    969:                error = EINVAL;
                    970:                goto release;
                    971:        }
                    972:
1.1       cgd       973:        /*
                    974:         * Note: need to block udp_input while changing
                    975:         * the udp pcb queue and/or pcb addresses.
                    976:         */
                    977:        switch (req) {
                    978:
                    979:        case PRU_ATTACH:
1.31      mycroft   980:                if (inp != 0) {
                    981:                        error = EISCONN;
1.1       cgd       982:                        break;
                    983:                }
1.98      matt      984: #ifdef MBUFTRACE
                    985:                so->so_mowner = &udp_mowner;
                    986:                so->so_rcv.sb_mowner = &udp_rx_mowner;
                    987:                so->so_snd.sb_mowner = &udp_tx_mowner;
                    988: #endif
1.31      mycroft   989:                if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
                    990:                        error = soreserve(so, udp_sendspace, udp_recvspace);
                    991:                        if (error)
                    992:                                break;
                    993:                }
1.18      mycroft   994:                error = in_pcballoc(so, &udbtable);
1.1       cgd       995:                if (error)
                    996:                        break;
1.31      mycroft   997:                inp = sotoinpcb(so);
                    998:                inp->inp_ip.ip_ttl = ip_defttl;
1.1       cgd       999:                break;
                   1000:
                   1001:        case PRU_DETACH:
1.31      mycroft  1002:                in_pcbdetach(inp);
1.1       cgd      1003:                break;
                   1004:
                   1005:        case PRU_BIND:
1.31      mycroft  1006:                error = in_pcbbind(inp, nam, p);
1.1       cgd      1007:                break;
                   1008:
                   1009:        case PRU_LISTEN:
                   1010:                error = EOPNOTSUPP;
                   1011:                break;
                   1012:
                   1013:        case PRU_CONNECT:
1.31      mycroft  1014:                error = in_pcbconnect(inp, nam);
                   1015:                if (error)
1.1       cgd      1016:                        break;
1.31      mycroft  1017:                soisconnected(so);
1.1       cgd      1018:                break;
                   1019:
                   1020:        case PRU_CONNECT2:
                   1021:                error = EOPNOTSUPP;
                   1022:                break;
                   1023:
                   1024:        case PRU_DISCONNECT:
1.31      mycroft  1025:                /*soisdisconnected(so);*/
                   1026:                so->so_state &= ~SS_ISCONNECTED;        /* XXX */
1.1       cgd      1027:                in_pcbdisconnect(inp);
1.34      mycroft  1028:                inp->inp_laddr = zeroin_addr;           /* XXX */
1.35      mycroft  1029:                in_pcbstate(inp, INP_BOUND);            /* XXX */
1.1       cgd      1030:                break;
                   1031:
                   1032:        case PRU_SHUTDOWN:
                   1033:                socantsendmore(so);
                   1034:                break;
                   1035:
1.31      mycroft  1036:        case PRU_RCVD:
                   1037:                error = EOPNOTSUPP;
1.1       cgd      1038:                break;
                   1039:
1.31      mycroft  1040:        case PRU_SEND:
1.32      mycroft  1041:                if (control && control->m_len) {
                   1042:                        m_freem(control);
                   1043:                        m_freem(m);
                   1044:                        error = EINVAL;
                   1045:                        break;
                   1046:                }
1.31      mycroft  1047:        {
1.35      mycroft  1048:                struct in_addr laddr;                   /* XXX */
1.1       cgd      1049:
1.31      mycroft  1050:                if (nam) {
1.35      mycroft  1051:                        laddr = inp->inp_laddr;         /* XXX */
1.31      mycroft  1052:                        if ((so->so_state & SS_ISCONNECTED) != 0) {
                   1053:                                error = EISCONN;
1.32      mycroft  1054:                                goto die;
1.31      mycroft  1055:                        }
                   1056:                        error = in_pcbconnect(inp, nam);
1.100     matt     1057:                        if (error)
                   1058:                                goto die;
1.31      mycroft  1059:                } else {
                   1060:                        if ((so->so_state & SS_ISCONNECTED) == 0) {
                   1061:                                error = ENOTCONN;
1.32      mycroft  1062:                                goto die;
1.31      mycroft  1063:                        }
                   1064:                }
1.33      mycroft  1065:                error = udp_output(m, inp);
1.100     matt     1066:                m = NULL;
1.31      mycroft  1067:                if (nam) {
                   1068:                        in_pcbdisconnect(inp);
1.35      mycroft  1069:                        inp->inp_laddr = laddr;         /* XXX */
                   1070:                        in_pcbstate(inp, INP_BOUND);    /* XXX */
1.31      mycroft  1071:                }
1.100     matt     1072:          die:
                   1073:                if (m)
                   1074:                        m_freem(m);
1.31      mycroft  1075:        }
1.1       cgd      1076:                break;
                   1077:
                   1078:        case PRU_SENSE:
                   1079:                /*
                   1080:                 * stat: don't bother with a blocksize.
                   1081:                 */
1.31      mycroft  1082:                splx(s);
1.1       cgd      1083:                return (0);
                   1084:
1.31      mycroft  1085:        case PRU_RCVOOB:
                   1086:                error =  EOPNOTSUPP;
                   1087:                break;
                   1088:
1.1       cgd      1089:        case PRU_SENDOOB:
1.32      mycroft  1090:                m_freem(control);
1.31      mycroft  1091:                m_freem(m);
1.1       cgd      1092:                error =  EOPNOTSUPP;
                   1093:                break;
                   1094:
1.31      mycroft  1095:        case PRU_SOCKADDR:
                   1096:                in_setsockaddr(inp, nam);
                   1097:                break;
                   1098:
                   1099:        case PRU_PEERADDR:
                   1100:                in_setpeeraddr(inp, nam);
                   1101:                break;
1.1       cgd      1102:
                   1103:        default:
                   1104:                panic("udp_usrreq");
                   1105:        }
                   1106:
                   1107: release:
1.31      mycroft  1108:        splx(s);
1.1       cgd      1109:        return (error);
1.13      mycroft  1110: }
                   1111:
                   1112: /*
                   1113:  * Sysctl for udp variables.
                   1114:  */
1.114     atatat   1115: SYSCTL_SETUP(sysctl_net_inet_udp_setup, "sysctl net.inet.udp subtree setup")
1.13      mycroft  1116: {
1.114     atatat   1117:
1.116     atatat   1118:        sysctl_createv(clog, 0, NULL, NULL,
                   1119:                       CTLFLAG_PERMANENT,
1.114     atatat   1120:                       CTLTYPE_NODE, "net", NULL,
                   1121:                       NULL, 0, NULL, 0,
                   1122:                       CTL_NET, CTL_EOL);
1.116     atatat   1123:        sysctl_createv(clog, 0, NULL, NULL,
                   1124:                       CTLFLAG_PERMANENT,
1.114     atatat   1125:                       CTLTYPE_NODE, "inet", NULL,
                   1126:                       NULL, 0, NULL, 0,
                   1127:                       CTL_NET, PF_INET, CTL_EOL);
1.116     atatat   1128:        sysctl_createv(clog, 0, NULL, NULL,
                   1129:                       CTLFLAG_PERMANENT,
1.114     atatat   1130:                       CTLTYPE_NODE, "udp", NULL,
                   1131:                       NULL, 0, NULL, 0,
                   1132:                       CTL_NET, PF_INET, IPPROTO_UDP, CTL_EOL);
                   1133:
1.116     atatat   1134:        sysctl_createv(clog, 0, NULL, NULL,
                   1135:                       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.114     atatat   1136:                       CTLTYPE_INT, "checksum", NULL,
                   1137:                       NULL, 0, &udpcksum, 0,
                   1138:                       CTL_NET, PF_INET, IPPROTO_UDP, UDPCTL_CHECKSUM,
                   1139:                       CTL_EOL);
1.116     atatat   1140:        sysctl_createv(clog, 0, NULL, NULL,
                   1141:                       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.114     atatat   1142:                       CTLTYPE_INT, "sendspace", NULL,
                   1143:                       NULL, 0, &udp_sendspace, 0,
                   1144:                       CTL_NET, PF_INET, IPPROTO_UDP, UDPCTL_SENDSPACE,
                   1145:                       CTL_EOL);
1.116     atatat   1146:        sysctl_createv(clog, 0, NULL, NULL,
                   1147:                       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.114     atatat   1148:                       CTLTYPE_INT, "recvspace", NULL,
                   1149:                       NULL, 0, &udp_recvspace, 0,
                   1150:                       CTL_NET, PF_INET, IPPROTO_UDP, UDPCTL_RECVSPACE,
                   1151:                       CTL_EOL);
1.1       cgd      1152: }
1.72      itojun   1153: #endif

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