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Annotation of src/sys/netinet/udp_usrreq.c, Revision 1.120

1.120   ! matt        1: /*     $NetBSD: udp_usrreq.c,v 1.119 2004/04/18 23:35:56 matt 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>
1.120   ! matt       64: __KERNEL_RCSID(0, "$NetBSD: udp_usrreq.c,v 1.119 2004/04/18 23:35:56 matt 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:
1.53      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>
                    120: #ifdef INET6
                    121: #include <netipsec/ipsec6.h>
                    122: #endif
                    123: #endif /* FAST_IPSEC*/
                    124:
1.48      itojun    125: #ifdef IPSEC
                    126: #include <netinet6/ipsec.h>
                    127: #include <netkey/key.h>
                    128: #endif /*IPSEC*/
                    129:
1.64      ws        130: #ifdef IPKDB
                    131: #include <ipkdb/ipkdb.h>
                    132: #endif
                    133:
1.8       mycroft   134: /*
                    135:  * UDP protocol implementation.
                    136:  * Per RFC 768, August, 1980.
                    137:  */
                    138: #ifndef        COMPAT_42
                    139: int    udpcksum = 1;
                    140: #else
                    141: int    udpcksum = 0;           /* XXX */
                    142: #endif
1.93      matt      143:
                    144: struct inpcbtable udbtable;
                    145: struct udpstat udpstat;
1.8       mycroft   146:
1.72      itojun    147: #ifdef INET
1.119     matt      148: static void udp4_sendup (struct mbuf *, int, struct sockaddr *,
                    149:        struct socket *);
                    150: static int udp4_realinput (struct sockaddr_in *, struct sockaddr_in *,
                    151:        struct mbuf *, int);
1.72      itojun    152: #endif
1.53      itojun    153: #ifdef INET6
1.119     matt      154: static void udp6_sendup (struct mbuf *, int, struct sockaddr *,
                    155:        struct socket *);
                    156: static int udp6_realinput (int, struct sockaddr_in6 *,
                    157:        struct sockaddr_in6 *, struct mbuf *, int);
1.53      itojun    158: #endif
1.72      itojun    159: #ifdef INET
1.119     matt      160: static void udp_notify (struct inpcb *, int);
1.72      itojun    161: #endif
1.7       mycroft   162:
1.26      mycroft   163: #ifndef UDBHASHSIZE
                    164: #define        UDBHASHSIZE     128
                    165: #endif
                    166: int    udbhashsize = UDBHASHSIZE;
                    167:
1.98      matt      168: #ifdef MBUFTRACE
                    169: struct mowner udp_mowner = { "udp" };
                    170: struct mowner udp_rx_mowner = { "udp", "rx" };
                    171: struct mowner udp_tx_mowner = { "udp", "tx" };
                    172: #endif
                    173:
1.78      thorpej   174: #ifdef UDP_CSUM_COUNTERS
                    175: #include <sys/device.h>
                    176:
                    177: struct evcnt udp_hwcsum_bad = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
                    178:     NULL, "udp", "hwcsum bad");
                    179: struct evcnt udp_hwcsum_ok = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
                    180:     NULL, "udp", "hwcsum ok");
                    181: struct evcnt udp_hwcsum_data = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
                    182:     NULL, "udp", "hwcsum data");
                    183: struct evcnt udp_swcsum = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
                    184:     NULL, "udp", "swcsum");
                    185:
                    186: #define        UDP_CSUM_COUNTER_INCR(ev)       (ev)->ev_count++
                    187:
1.120   ! matt      188: EVCNT_ATTACH_STATIC(udp_hwcsum_bad);
        !           189: EVCNT_ATTACH_STATIC(udp_hwcsum_ok);
        !           190: EVCNT_ATTACH_STATIC(udp_hwcsum_data);
        !           191: EVCNT_ATTACH_STATIC(udp_swcsum);
        !           192:
1.78      thorpej   193: #else
                    194:
                    195: #define        UDP_CSUM_COUNTER_INCR(ev)       /* nothing */
                    196:
                    197: #endif /* UDP_CSUM_COUNTERS */
                    198:
1.7       mycroft   199: void
1.119     matt      200: udp_init(void)
1.1       cgd       201: {
1.18      mycroft   202:
1.35      mycroft   203:        in_pcbinit(&udbtable, udbhashsize, udbhashsize);
1.78      thorpej   204:
1.98      matt      205:        MOWNER_ATTACH(&udp_tx_mowner);
                    206:        MOWNER_ATTACH(&udp_rx_mowner);
                    207:        MOWNER_ATTACH(&udp_mowner);
1.1       cgd       208: }
                    209:
1.72      itojun    210: #ifdef INET
1.7       mycroft   211: void
1.27      christos  212: udp_input(struct mbuf *m, ...)
1.1       cgd       213: {
1.53      itojun    214:        va_list ap;
                    215:        struct sockaddr_in src, dst;
                    216:        struct ip *ip;
                    217:        struct udphdr *uh;
1.97      simonb    218:        int iphlen;
1.53      itojun    219:        int len;
                    220:        int n;
1.96      itojun    221:        u_int16_t ip_len;
1.53      itojun    222:
                    223:        va_start(ap, m);
                    224:        iphlen = va_arg(ap, int);
1.97      simonb    225:        (void)va_arg(ap, int);          /* ignore value, advance ap */
1.53      itojun    226:        va_end(ap);
                    227:
1.98      matt      228:        MCLAIM(m, &udp_rx_mowner);
1.53      itojun    229:        udpstat.udps_ipackets++;
                    230:
                    231:        /*
                    232:         * Get IP and UDP header together in first mbuf.
                    233:         */
                    234:        ip = mtod(m, struct ip *);
                    235:        IP6_EXTHDR_GET(uh, struct udphdr *, m, iphlen, sizeof(struct udphdr));
                    236:        if (uh == NULL) {
                    237:                udpstat.udps_hdrops++;
                    238:                return;
                    239:        }
1.95      thorpej   240:        KASSERT(UDP_HDR_ALIGNED_P(uh));
1.53      itojun    241:
1.57      itojun    242:        /* destination port of 0 is illegal, based on RFC768. */
                    243:        if (uh->uh_dport == 0)
                    244:                goto bad;
                    245:
1.53      itojun    246:        /*
                    247:         * Make mbuf data length reflect UDP length.
                    248:         * If not enough data to reflect UDP length, drop.
                    249:         */
1.96      itojun    250:        ip_len = ntohs(ip->ip_len);
1.53      itojun    251:        len = ntohs((u_int16_t)uh->uh_ulen);
1.96      itojun    252:        if (ip_len != iphlen + len) {
                    253:                if (ip_len < iphlen + len || len < sizeof(struct udphdr)) {
1.53      itojun    254:                        udpstat.udps_badlen++;
                    255:                        goto bad;
                    256:                }
1.96      itojun    257:                m_adj(m, iphlen + len - ip_len);
1.53      itojun    258:        }
                    259:
                    260:        /*
                    261:         * Checksum extended UDP header and data.
                    262:         */
                    263:        if (uh->uh_sum) {
1.78      thorpej   264:                switch (m->m_pkthdr.csum_flags &
1.112     enami     265:                    ((m->m_pkthdr.rcvif->if_csum_flags_rx & M_CSUM_UDPv4) |
                    266:                    M_CSUM_TCP_UDP_BAD | M_CSUM_DATA)) {
1.78      thorpej   267:                case M_CSUM_UDPv4|M_CSUM_TCP_UDP_BAD:
                    268:                        UDP_CSUM_COUNTER_INCR(&udp_hwcsum_bad);
                    269:                        goto badcsum;
                    270:
1.106     jonathan  271:                case M_CSUM_UDPv4|M_CSUM_DATA: {
                    272:                        u_int32_t hw_csum = m->m_pkthdr.csum_data;
1.78      thorpej   273:                        UDP_CSUM_COUNTER_INCR(&udp_hwcsum_data);
1.106     jonathan  274:                        if (m->m_pkthdr.csum_flags & M_CSUM_NO_PSEUDOHDR)
1.112     enami     275:                                hw_csum = in_cksum_phdr(ip->ip_src.s_addr,
                    276:                                    ip->ip_dst.s_addr,
1.115     drochner  277:                                    htons(hw_csum + len + IPPROTO_UDP));
1.106     jonathan  278:                        if ((hw_csum ^ 0xffff) != 0)
1.78      thorpej   279:                                goto badcsum;
                    280:                        break;
1.106     jonathan  281:                }
1.78      thorpej   282:
                    283:                case M_CSUM_UDPv4:
                    284:                        /* Checksum was okay. */
                    285:                        UDP_CSUM_COUNTER_INCR(&udp_hwcsum_ok);
                    286:                        break;
                    287:
                    288:                default:
                    289:                        /* Need to compute it ourselves. */
                    290:                        UDP_CSUM_COUNTER_INCR(&udp_swcsum);
                    291:                        if (in4_cksum(m, IPPROTO_UDP, iphlen, len) != 0)
                    292:                                goto badcsum;
                    293:                        break;
1.53      itojun    294:                }
                    295:        }
                    296:
                    297:        /* construct source and dst sockaddrs. */
                    298:        bzero(&src, sizeof(src));
                    299:        src.sin_family = AF_INET;
                    300:        src.sin_len = sizeof(struct sockaddr_in);
                    301:        bcopy(&ip->ip_src, &src.sin_addr, sizeof(src.sin_addr));
                    302:        src.sin_port = uh->uh_sport;
                    303:        bzero(&dst, sizeof(dst));
                    304:        dst.sin_family = AF_INET;
                    305:        dst.sin_len = sizeof(struct sockaddr_in);
                    306:        bcopy(&ip->ip_dst, &dst.sin_addr, sizeof(dst.sin_addr));
                    307:        dst.sin_port = uh->uh_dport;
                    308:
                    309:        n = udp4_realinput(&src, &dst, m, iphlen);
                    310: #ifdef INET6
                    311:        if (IN_MULTICAST(ip->ip_dst.s_addr) || n == 0) {
                    312:                struct sockaddr_in6 src6, dst6;
                    313:
                    314:                bzero(&src6, sizeof(src6));
                    315:                src6.sin6_family = AF_INET6;
                    316:                src6.sin6_len = sizeof(struct sockaddr_in6);
                    317:                src6.sin6_addr.s6_addr[10] = src6.sin6_addr.s6_addr[11] = 0xff;
                    318:                bcopy(&ip->ip_src, &src6.sin6_addr.s6_addr[12],
                    319:                        sizeof(ip->ip_src));
                    320:                src6.sin6_port = uh->uh_sport;
                    321:                bzero(&dst6, sizeof(dst6));
                    322:                dst6.sin6_family = AF_INET6;
                    323:                dst6.sin6_len = sizeof(struct sockaddr_in6);
                    324:                dst6.sin6_addr.s6_addr[10] = dst6.sin6_addr.s6_addr[11] = 0xff;
                    325:                bcopy(&ip->ip_dst, &dst6.sin6_addr.s6_addr[12],
                    326:                        sizeof(ip->ip_dst));
                    327:                dst6.sin6_port = uh->uh_dport;
                    328:
                    329:                n += udp6_realinput(AF_INET, &src6, &dst6, m, iphlen);
                    330:        }
                    331: #endif
                    332:
                    333:        if (n == 0) {
                    334:                if (m->m_flags & (M_BCAST | M_MCAST)) {
                    335:                        udpstat.udps_noportbcast++;
                    336:                        goto bad;
                    337:                }
1.61      itojun    338:                udpstat.udps_noport++;
1.64      ws        339: #ifdef IPKDB
1.53      itojun    340:                if (checkipkdb(&ip->ip_src, uh->uh_sport, uh->uh_dport,
                    341:                                m, iphlen + sizeof(struct udphdr),
                    342:                                m->m_pkthdr.len - iphlen - sizeof(struct udphdr))) {
                    343:                        /*
                    344:                         * It was a debugger connect packet,
                    345:                         * just drop it now
                    346:                         */
                    347:                        goto bad;
                    348:                }
                    349: #endif
                    350:                icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0);
                    351:                m = NULL;
                    352:        }
                    353:
                    354: bad:
                    355:        if (m)
                    356:                m_freem(m);
1.78      thorpej   357:        return;
                    358:
                    359: badcsum:
                    360:        m_freem(m);
                    361:        udpstat.udps_badsum++;
1.53      itojun    362: }
1.72      itojun    363: #endif
1.53      itojun    364:
                    365: #ifdef INET6
                    366: int
1.119     matt      367: udp6_input(struct mbuf **mp, int *offp, int proto)
1.53      itojun    368: {
                    369:        struct mbuf *m = *mp;
                    370:        int off = *offp;
                    371:        struct sockaddr_in6 src, dst;
                    372:        struct ip6_hdr *ip6;
                    373:        struct udphdr *uh;
                    374:        u_int32_t plen, ulen;
                    375:
1.76      itojun    376:        ip6 = mtod(m, struct ip6_hdr *);
                    377:
1.53      itojun    378: #if defined(NFAITH) && 0 < NFAITH
1.76      itojun    379:        if (faithprefix(&ip6->ip6_dst)) {
                    380:                /* send icmp6 host unreach? */
                    381:                m_freem(m);
                    382:                return IPPROTO_DONE;
1.53      itojun    383:        }
                    384: #endif
                    385:
                    386:        udp6stat.udp6s_ipackets++;
                    387:
                    388:        /* check for jumbogram is done in ip6_input.  we can trust pkthdr.len */
                    389:        plen = m->m_pkthdr.len - off;
                    390:        IP6_EXTHDR_GET(uh, struct udphdr *, m, off, sizeof(struct udphdr));
                    391:        if (uh == NULL) {
                    392:                ip6stat.ip6s_tooshort++;
                    393:                return IPPROTO_DONE;
                    394:        }
1.95      thorpej   395:        KASSERT(UDP_HDR_ALIGNED_P(uh));
1.53      itojun    396:        ulen = ntohs((u_short)uh->uh_ulen);
1.69      itojun    397:        /*
                    398:         * RFC2675 section 4: jumbograms will have 0 in the UDP header field,
                    399:         * iff payload length > 0xffff.
                    400:         */
1.53      itojun    401:        if (ulen == 0 && plen > 0xffff)
                    402:                ulen = plen;
                    403:
                    404:        if (plen != ulen) {
                    405:                udp6stat.udp6s_badlen++;
1.54      itojun    406:                goto bad;
                    407:        }
                    408:
1.57      itojun    409:        /* destination port of 0 is illegal, based on RFC768. */
                    410:        if (uh->uh_dport == 0)
                    411:                goto bad;
                    412:
1.54      itojun    413:        /* Be proactive about malicious use of IPv4 mapped address */
                    414:        if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
                    415:            IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
                    416:                /* XXX stat */
1.53      itojun    417:                goto bad;
                    418:        }
                    419:
                    420:        /*
                    421:         * Checksum extended UDP header and data.
                    422:         */
1.117     itojun    423:        if (uh->uh_sum == 0) {
1.53      itojun    424:                udp6stat.udp6s_nosum++;
1.117     itojun    425:                goto bad;
1.118     itojun    426:        }
                    427:        if (in6_cksum(m, IPPROTO_UDP, off, ulen) != 0) {
1.53      itojun    428:                udp6stat.udp6s_badsum++;
                    429:                goto bad;
                    430:        }
                    431:
                    432:        /*
                    433:         * Construct source and dst sockaddrs.
                    434:         * Note that ifindex (s6_addr16[1]) is already filled.
                    435:         */
                    436:        bzero(&src, sizeof(src));
                    437:        src.sin6_family = AF_INET6;
                    438:        src.sin6_len = sizeof(struct sockaddr_in6);
1.69      itojun    439:        /* KAME hack: recover scopeid */
                    440:        (void)in6_recoverscope(&src, &ip6->ip6_src, m->m_pkthdr.rcvif);
1.53      itojun    441:        src.sin6_port = uh->uh_sport;
                    442:        bzero(&dst, sizeof(dst));
                    443:        dst.sin6_family = AF_INET6;
                    444:        dst.sin6_len = sizeof(struct sockaddr_in6);
1.69      itojun    445:        /* KAME hack: recover scopeid */
                    446:        (void)in6_recoverscope(&dst, &ip6->ip6_dst, m->m_pkthdr.rcvif);
1.53      itojun    447:        dst.sin6_port = uh->uh_dport;
                    448:
                    449:        if (udp6_realinput(AF_INET6, &src, &dst, m, off) == 0) {
                    450:                if (m->m_flags & M_MCAST) {
                    451:                        udp6stat.udp6s_noportmcast++;
                    452:                        goto bad;
                    453:                }
1.61      itojun    454:                udp6stat.udp6s_noport++;
1.53      itojun    455:                icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0);
                    456:                m = NULL;
                    457:        }
                    458:
                    459: bad:
                    460:        if (m)
                    461:                m_freem(m);
                    462:        return IPPROTO_DONE;
                    463: }
                    464: #endif
                    465:
1.72      itojun    466: #ifdef INET
1.53      itojun    467: static void
1.119     matt      468: udp4_sendup(struct mbuf *m, int off /* offset of data portion */,
                    469:        struct sockaddr *src, struct socket *so)
1.53      itojun    470: {
                    471:        struct mbuf *opts = NULL;
                    472:        struct mbuf *n;
                    473:        struct inpcb *inp = NULL;
                    474:
                    475:        if (!so)
                    476:                return;
                    477:        switch (so->so_proto->pr_domain->dom_family) {
                    478:        case AF_INET:
                    479:                inp = sotoinpcb(so);
                    480:                break;
                    481: #ifdef INET6
                    482:        case AF_INET6:
                    483:                break;
                    484: #endif
                    485:        default:
                    486:                return;
                    487:        }
                    488:
1.105     jonathan  489: #if defined(IPSEC) || defined(FAST_IPSEC)
1.53      itojun    490:        /* check AH/ESP integrity. */
                    491:        if (so != NULL && ipsec4_in_reject_so(m, so)) {
                    492:                ipsecstat.in_polvio++;
1.110     itojun    493:                if ((n = m_copy(m, 0, M_COPYALL)) != NULL)
                    494:                        icmp_error(n, ICMP_UNREACH, ICMP_UNREACH_ADMIN_PROHIBIT,
                    495:                            0, 0);
1.53      itojun    496:                return;
                    497:        }
                    498: #endif /*IPSEC*/
                    499:
                    500:        if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
                    501:                if (inp && (inp->inp_flags & INP_CONTROLOPTS
                    502:                         || so->so_options & SO_TIMESTAMP)) {
                    503:                        struct ip *ip = mtod(n, struct ip *);
                    504:                        ip_savecontrol(inp, &opts, ip, n);
                    505:                }
                    506:
                    507:                m_adj(n, off);
                    508:                if (sbappendaddr(&so->so_rcv, src, n,
                    509:                                opts) == 0) {
                    510:                        m_freem(n);
                    511:                        if (opts)
                    512:                                m_freem(opts);
1.81      enami     513:                        udpstat.udps_fullsock++;
1.53      itojun    514:                } else
                    515:                        sorwakeup(so);
                    516:        }
                    517: }
1.72      itojun    518: #endif
1.53      itojun    519:
                    520: #ifdef INET6
                    521: static void
1.119     matt      522: udp6_sendup(struct mbuf *m, int off /* offset of data portion */,
                    523:        struct sockaddr *src, struct socket *so)
1.53      itojun    524: {
                    525:        struct mbuf *opts = NULL;
                    526:        struct mbuf *n;
                    527:        struct in6pcb *in6p = NULL;
                    528:
                    529:        if (!so)
                    530:                return;
                    531:        if (so->so_proto->pr_domain->dom_family != AF_INET6)
                    532:                return;
                    533:        in6p = sotoin6pcb(so);
                    534:
1.105     jonathan  535: #if defined(IPSEC) || defined(FAST_IPSEC)
1.53      itojun    536:        /* check AH/ESP integrity. */
                    537:        if (so != NULL && ipsec6_in_reject_so(m, so)) {
                    538:                ipsec6stat.in_polvio++;
1.111     mycroft   539:                if ((n = m_copy(m, 0, M_COPYALL)) != NULL)
1.110     itojun    540:                        icmp6_error(n, ICMP6_DST_UNREACH,
                    541:                            ICMP6_DST_UNREACH_ADMIN, 0);
1.53      itojun    542:                return;
                    543:        }
                    544: #endif /*IPSEC*/
                    545:
                    546:        if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
                    547:                if (in6p && (in6p->in6p_flags & IN6P_CONTROLOPTS
                    548:                          || in6p->in6p_socket->so_options & SO_TIMESTAMP)) {
                    549:                        struct ip6_hdr *ip6 = mtod(n, struct ip6_hdr *);
                    550:                        ip6_savecontrol(in6p, &opts, ip6, n);
                    551:                }
                    552:
                    553:                m_adj(n, off);
                    554:                if (sbappendaddr(&so->so_rcv, src, n, opts) == 0) {
                    555:                        m_freem(n);
                    556:                        if (opts)
                    557:                                m_freem(opts);
                    558:                        udp6stat.udp6s_fullsock++;
                    559:                } else
                    560:                        sorwakeup(so);
                    561:        }
                    562: }
                    563: #endif
                    564:
1.72      itojun    565: #ifdef INET
1.53      itojun    566: static int
1.119     matt      567: udp4_realinput(struct sockaddr_in *src, struct sockaddr_in *dst,
                    568:        struct mbuf *m, int off /* offset of udphdr */)
1.53      itojun    569: {
                    570:        u_int16_t *sport, *dport;
                    571:        int rcvcnt;
                    572:        struct in_addr *src4, *dst4;
1.109     itojun    573:        struct inpcb_hdr *inph;
1.53      itojun    574:        struct inpcb *inp;
                    575:
                    576:        rcvcnt = 0;
                    577:        off += sizeof(struct udphdr);   /* now, offset of payload */
                    578:
                    579:        if (src->sin_family != AF_INET || dst->sin_family != AF_INET)
                    580:                goto bad;
                    581:
                    582:        src4 = &src->sin_addr;
                    583:        sport = &src->sin_port;
                    584:        dst4 = &dst->sin_addr;
                    585:        dport = &dst->sin_port;
                    586:
1.73      itojun    587:        if (IN_MULTICAST(dst4->s_addr) ||
1.53      itojun    588:            in_broadcast(*dst4, m->m_pkthdr.rcvif)) {
                    589:                /*
                    590:                 * Deliver a multicast or broadcast datagram to *all* sockets
                    591:                 * for which the local and remote addresses and ports match
                    592:                 * those of the incoming datagram.  This allows more than
                    593:                 * one process to receive multi/broadcasts on the same port.
                    594:                 * (This really ought to be done for unicast datagrams as
                    595:                 * well, but that would cause problems with existing
                    596:                 * applications that open both address-specific sockets and
                    597:                 * a wildcard socket listening to the same port -- they would
                    598:                 * end up receiving duplicates of every unicast datagram.
                    599:                 * Those applications open the multiple sockets to overcome an
                    600:                 * inadequacy of the UDP socket interface, but for backwards
                    601:                 * compatibility we avoid the problem here rather than
                    602:                 * fixing the interface.  Maybe 4.5BSD will remedy this?)
                    603:                 */
                    604:
                    605:                /*
1.92      itojun    606:                 * KAME note: traditionally we dropped udpiphdr from mbuf here.
1.71      itojun    607:                 * we need udpiphdr for IPsec processing so we do that later.
1.53      itojun    608:                 */
                    609:                /*
                    610:                 * Locate pcb(s) for datagram.
                    611:                 */
1.109     itojun    612:                CIRCLEQ_FOREACH(inph, &udbtable.inpt_queue, inph_queue) {
                    613:                        inp = (struct inpcb *)inph;
                    614:                        if (inp->inp_af != AF_INET)
                    615:                                continue;
                    616:
1.53      itojun    617:                        if (inp->inp_lport != *dport)
                    618:                                continue;
                    619:                        if (!in_nullhost(inp->inp_laddr)) {
                    620:                                if (!in_hosteq(inp->inp_laddr, *dst4))
                    621:                                        continue;
                    622:                        }
                    623:                        if (!in_nullhost(inp->inp_faddr)) {
                    624:                                if (!in_hosteq(inp->inp_faddr, *src4) ||
                    625:                                    inp->inp_fport != *sport)
                    626:                                        continue;
                    627:                        }
                    628:
                    629:                        udp4_sendup(m, off, (struct sockaddr *)src,
                    630:                                inp->inp_socket);
                    631:                        rcvcnt++;
                    632:
                    633:                        /*
                    634:                         * Don't look for additional matches if this one does
                    635:                         * not have either the SO_REUSEPORT or SO_REUSEADDR
                    636:                         * socket options set.  This heuristic avoids searching
                    637:                         * through all pcbs in the common case of a non-shared
                    638:                         * port.  It assumes that an application will never
                    639:                         * clear these options after setting them.
                    640:                         */
                    641:                        if ((inp->inp_socket->so_options &
                    642:                            (SO_REUSEPORT|SO_REUSEADDR)) == 0)
                    643:                                break;
                    644:                }
                    645:        } else {
                    646:                /*
                    647:                 * Locate pcb for datagram.
                    648:                 */
                    649:                inp = in_pcblookup_connect(&udbtable, *src4, *sport, *dst4, *dport);
                    650:                if (inp == 0) {
                    651:                        ++udpstat.udps_pcbhashmiss;
                    652:                        inp = in_pcblookup_bind(&udbtable, *dst4, *dport);
1.82      itojun    653:                        if (inp == 0)
1.53      itojun    654:                                return rcvcnt;
                    655:                }
                    656:
                    657:                udp4_sendup(m, off, (struct sockaddr *)src, inp->inp_socket);
                    658:                rcvcnt++;
                    659:        }
                    660:
                    661: bad:
                    662:        return rcvcnt;
                    663: }
1.72      itojun    664: #endif
1.53      itojun    665:
                    666: #ifdef INET6
                    667: static int
1.119     matt      668: udp6_realinput(int af, struct sockaddr_in6 *src, struct sockaddr_in6 *dst,
                    669:        struct mbuf *m, int off)
1.53      itojun    670: {
1.79      itojun    671:        u_int16_t sport, dport;
1.53      itojun    672:        int rcvcnt;
1.79      itojun    673:        struct in6_addr src6, dst6;
                    674:        const struct in_addr *dst4;
1.109     itojun    675:        struct inpcb_hdr *inph;
1.53      itojun    676:        struct in6pcb *in6p;
                    677:
                    678:        rcvcnt = 0;
                    679:        off += sizeof(struct udphdr);   /* now, offset of payload */
                    680:
                    681:        if (af != AF_INET && af != AF_INET6)
                    682:                goto bad;
                    683:        if (src->sin6_family != AF_INET6 || dst->sin6_family != AF_INET6)
                    684:                goto bad;
                    685:
1.79      itojun    686:        in6_embedscope(&src6, src, NULL, NULL);
                    687:        sport = src->sin6_port;
                    688:        in6_embedscope(&dst6, dst, NULL, NULL);
                    689:        dport = dst->sin6_port;
1.88      itojun    690:        dst4 = (struct in_addr *)&dst->sin6_addr.s6_addr[12];
1.53      itojun    691:
1.79      itojun    692:        if (IN6_IS_ADDR_MULTICAST(&dst6) ||
                    693:            (af == AF_INET && IN_MULTICAST(dst4->s_addr))) {
1.53      itojun    694:                /*
                    695:                 * Deliver a multicast or broadcast datagram to *all* sockets
                    696:                 * for which the local and remote addresses and ports match
                    697:                 * those of the incoming datagram.  This allows more than
                    698:                 * one process to receive multi/broadcasts on the same port.
                    699:                 * (This really ought to be done for unicast datagrams as
                    700:                 * well, but that would cause problems with existing
                    701:                 * applications that open both address-specific sockets and
                    702:                 * a wildcard socket listening to the same port -- they would
                    703:                 * end up receiving duplicates of every unicast datagram.
                    704:                 * Those applications open the multiple sockets to overcome an
                    705:                 * inadequacy of the UDP socket interface, but for backwards
                    706:                 * compatibility we avoid the problem here rather than
                    707:                 * fixing the interface.  Maybe 4.5BSD will remedy this?)
                    708:                 */
                    709:
                    710:                /*
1.92      itojun    711:                 * KAME note: traditionally we dropped udpiphdr from mbuf here.
1.71      itojun    712:                 * we need udpiphdr for IPsec processing so we do that later.
1.53      itojun    713:                 */
                    714:                /*
                    715:                 * Locate pcb(s) for datagram.
                    716:                 */
1.109     itojun    717:                CIRCLEQ_FOREACH(inph, &udbtable.inpt_queue, inph_queue) {
                    718:                        in6p = (struct in6pcb *)inph;
                    719:                        if (in6p->in6p_af != AF_INET6)
                    720:                                continue;
                    721:
1.79      itojun    722:                        if (in6p->in6p_lport != dport)
1.53      itojun    723:                                continue;
                    724:                        if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) {
1.90      itojun    725:                                if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &dst6))
1.53      itojun    726:                                        continue;
1.92      itojun    727:                        } else {
1.79      itojun    728:                                if (IN6_IS_ADDR_V4MAPPED(&dst6) &&
1.85      itojun    729:                                    (in6p->in6p_flags & IN6P_IPV6_V6ONLY))
1.55      itojun    730:                                        continue;
                    731:                        }
1.53      itojun    732:                        if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
1.79      itojun    733:                                if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr,
                    734:                                    &src6) || in6p->in6p_fport != sport)
1.53      itojun    735:                                        continue;
1.92      itojun    736:                        } else {
1.79      itojun    737:                                if (IN6_IS_ADDR_V4MAPPED(&src6) &&
1.85      itojun    738:                                    (in6p->in6p_flags & IN6P_IPV6_V6ONLY))
1.55      itojun    739:                                        continue;
                    740:                        }
1.53      itojun    741:
                    742:                        udp6_sendup(m, off, (struct sockaddr *)src,
                    743:                                in6p->in6p_socket);
                    744:                        rcvcnt++;
                    745:
                    746:                        /*
                    747:                         * Don't look for additional matches if this one does
                    748:                         * not have either the SO_REUSEPORT or SO_REUSEADDR
                    749:                         * socket options set.  This heuristic avoids searching
                    750:                         * through all pcbs in the common case of a non-shared
                    751:                         * port.  It assumes that an application will never
                    752:                         * clear these options after setting them.
                    753:                         */
                    754:                        if ((in6p->in6p_socket->so_options &
                    755:                            (SO_REUSEPORT|SO_REUSEADDR)) == 0)
                    756:                                break;
                    757:                }
                    758:        } else {
                    759:                /*
                    760:                 * Locate pcb for datagram.
                    761:                 */
1.109     itojun    762:                in6p = in6_pcblookup_connect(&udbtable, &src6, sport,
1.79      itojun    763:                    &dst6, dport, 0);
1.53      itojun    764:                if (in6p == 0) {
                    765:                        ++udpstat.udps_pcbhashmiss;
1.109     itojun    766:                        in6p = in6_pcblookup_bind(&udbtable, &dst6, dport, 0);
1.82      itojun    767:                        if (in6p == 0)
1.53      itojun    768:                                return rcvcnt;
                    769:                }
                    770:
                    771:                udp6_sendup(m, off, (struct sockaddr *)src, in6p->in6p_socket);
                    772:                rcvcnt++;
                    773:        }
                    774:
                    775: bad:
                    776:        return rcvcnt;
                    777: }
                    778: #endif
1.1       cgd       779:
1.72      itojun    780: #ifdef INET
1.1       cgd       781: /*
                    782:  * Notify a udp user of an asynchronous error;
                    783:  * just wake up so that he can collect error status.
                    784:  */
1.7       mycroft   785: static void
1.119     matt      786: udp_notify(struct inpcb *inp, int errno)
1.1       cgd       787: {
                    788:        inp->inp_socket->so_error = errno;
                    789:        sorwakeup(inp->inp_socket);
                    790:        sowwakeup(inp->inp_socket);
                    791: }
                    792:
1.27      christos  793: void *
1.119     matt      794: udp_ctlinput(int cmd, struct sockaddr *sa, void *v)
1.1       cgd       795: {
1.66      augustss  796:        struct ip *ip = v;
                    797:        struct udphdr *uh;
1.119     matt      798:        void (*notify)(struct inpcb *, int) = udp_notify;
1.21      mycroft   799:        int errno;
1.1       cgd       800:
1.53      itojun    801:        if (sa->sa_family != AF_INET
                    802:         || sa->sa_len != sizeof(struct sockaddr_in))
1.51      itojun    803:                return NULL;
1.20      mycroft   804:        if ((unsigned)cmd >= PRC_NCMDS)
1.27      christos  805:                return NULL;
1.20      mycroft   806:        errno = inetctlerrmap[cmd];
1.18      mycroft   807:        if (PRC_IS_REDIRECT(cmd))
1.19      mycroft   808:                notify = in_rtchange, ip = 0;
1.18      mycroft   809:        else if (cmd == PRC_HOSTDEAD)
1.19      mycroft   810:                ip = 0;
1.23      cgd       811:        else if (errno == 0)
1.27      christos  812:                return NULL;
1.19      mycroft   813:        if (ip) {
1.1       cgd       814:                uh = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2));
1.34      mycroft   815:                in_pcbnotify(&udbtable, satosin(sa)->sin_addr, uh->uh_dport,
                    816:                    ip->ip_src, uh->uh_sport, errno, notify);
1.53      itojun    817:
                    818:                /* XXX mapped address case */
1.19      mycroft   819:        } else
1.34      mycroft   820:                in_pcbnotifyall(&udbtable, satosin(sa)->sin_addr, errno,
                    821:                    notify);
1.27      christos  822:        return NULL;
1.1       cgd       823: }
                    824:
1.7       mycroft   825: int
1.27      christos  826: udp_output(struct mbuf *m, ...)
                    827: {
1.66      augustss  828:        struct inpcb *inp;
                    829:        struct udpiphdr *ui;
                    830:        int len = m->m_pkthdr.len;
1.31      mycroft   831:        int error = 0;
1.27      christos  832:        va_list ap;
                    833:
1.98      matt      834:        MCLAIM(m, &udp_tx_mowner);
1.27      christos  835:        va_start(ap, m);
                    836:        inp = va_arg(ap, struct inpcb *);
                    837:        va_end(ap);
1.1       cgd       838:
                    839:        /*
                    840:         * Calculate data length and get a mbuf
                    841:         * for UDP and IP headers.
                    842:         */
1.13      mycroft   843:        M_PREPEND(m, sizeof(struct udpiphdr), M_DONTWAIT);
                    844:        if (m == 0) {
                    845:                error = ENOBUFS;
1.39      thorpej   846:                goto release;
                    847:        }
                    848:
                    849:        /*
                    850:         * Compute the packet length of the IP header, and
                    851:         * punt if the length looks bogus.
                    852:         */
1.96      itojun    853:        if (len + sizeof(struct udpiphdr) > IP_MAXPACKET) {
1.39      thorpej   854:                error = EMSGSIZE;
1.13      mycroft   855:                goto release;
                    856:        }
1.1       cgd       857:
                    858:        /*
                    859:         * Fill in mbuf with extended UDP header
                    860:         * and addresses and length put into network format.
                    861:         */
                    862:        ui = mtod(m, struct udpiphdr *);
                    863:        ui->ui_pr = IPPROTO_UDP;
                    864:        ui->ui_src = inp->inp_laddr;
                    865:        ui->ui_dst = inp->inp_faddr;
                    866:        ui->ui_sport = inp->inp_lport;
                    867:        ui->ui_dport = inp->inp_fport;
1.78      thorpej   868:        ui->ui_ulen = htons((u_int16_t)len + sizeof(struct udphdr));
1.1       cgd       869:
                    870:        /*
1.78      thorpej   871:         * Set up checksum and output datagram.
1.1       cgd       872:         */
                    873:        if (udpcksum) {
1.78      thorpej   874:                /*
                    875:                 * XXX Cache pseudo-header checksum part for
                    876:                 * XXX "connected" UDP sockets.
                    877:                 */
                    878:                ui->ui_sum = in_cksum_phdr(ui->ui_src.s_addr,
                    879:                    ui->ui_dst.s_addr, htons((u_int16_t)len +
                    880:                    sizeof(struct udphdr) + IPPROTO_UDP));
                    881:                m->m_pkthdr.csum_flags = M_CSUM_UDPv4;
                    882:                m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum);
                    883:        } else
                    884:                ui->ui_sum = 0;
1.96      itojun    885:        ((struct ip *)ui)->ip_len = htons(sizeof (struct udpiphdr) + len);
1.1       cgd       886:        ((struct ip *)ui)->ip_ttl = inp->inp_ip.ip_ttl; /* XXX */
                    887:        ((struct ip *)ui)->ip_tos = inp->inp_ip.ip_tos; /* XXX */
                    888:        udpstat.udps_opackets++;
1.48      itojun    889:
1.31      mycroft   890:        return (ip_output(m, inp->inp_options, &inp->inp_route,
1.12      mycroft   891:            inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST),
1.107     itojun    892:            inp->inp_moptions, inp->inp_socket));
1.1       cgd       893:
                    894: release:
                    895:        m_freem(m);
                    896:        return (error);
                    897: }
                    898:
1.42      thorpej   899: int    udp_sendspace = 9216;           /* really max datagram size */
                    900: int    udp_recvspace = 40 * (1024 + sizeof(struct sockaddr_in));
1.1       cgd       901:                                        /* 40 1K datagrams */
                    902:
                    903: /*ARGSUSED*/
1.7       mycroft   904: int
1.119     matt      905: udp_usrreq(struct socket *so, int req, struct mbuf *m, struct mbuf *nam,
                    906:        struct mbuf *control, struct proc *p)
1.1       cgd       907: {
1.66      augustss  908:        struct inpcb *inp;
1.1       cgd       909:        int s;
1.66      augustss  910:        int error = 0;
1.1       cgd       911:
                    912:        if (req == PRU_CONTROL)
1.31      mycroft   913:                return (in_control(so, (long)m, (caddr_t)nam,
1.30      mycroft   914:                    (struct ifnet *)control, p));
1.59      thorpej   915:
1.60      thorpej   916:        if (req == PRU_PURGEIF) {
1.80      itojun    917:                in_pcbpurgeif0(&udbtable, (struct ifnet *)control);
1.60      thorpej   918:                in_purgeif((struct ifnet *)control);
                    919:                in_pcbpurgeif(&udbtable, (struct ifnet *)control);
1.59      thorpej   920:                return (0);
                    921:        }
1.31      mycroft   922:
                    923:        s = splsoftnet();
                    924:        inp = sotoinpcb(so);
1.32      mycroft   925: #ifdef DIAGNOSTIC
                    926:        if (req != PRU_SEND && req != PRU_SENDOOB && control)
                    927:                panic("udp_usrreq: unexpected control mbuf");
                    928: #endif
1.31      mycroft   929:        if (inp == 0 && req != PRU_ATTACH) {
                    930:                error = EINVAL;
                    931:                goto release;
                    932:        }
                    933:
1.1       cgd       934:        /*
                    935:         * Note: need to block udp_input while changing
                    936:         * the udp pcb queue and/or pcb addresses.
                    937:         */
                    938:        switch (req) {
                    939:
                    940:        case PRU_ATTACH:
1.31      mycroft   941:                if (inp != 0) {
                    942:                        error = EISCONN;
1.1       cgd       943:                        break;
                    944:                }
1.98      matt      945: #ifdef MBUFTRACE
                    946:                so->so_mowner = &udp_mowner;
                    947:                so->so_rcv.sb_mowner = &udp_rx_mowner;
                    948:                so->so_snd.sb_mowner = &udp_tx_mowner;
                    949: #endif
1.31      mycroft   950:                if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
                    951:                        error = soreserve(so, udp_sendspace, udp_recvspace);
                    952:                        if (error)
                    953:                                break;
                    954:                }
1.18      mycroft   955:                error = in_pcballoc(so, &udbtable);
1.1       cgd       956:                if (error)
                    957:                        break;
1.31      mycroft   958:                inp = sotoinpcb(so);
                    959:                inp->inp_ip.ip_ttl = ip_defttl;
1.1       cgd       960:                break;
                    961:
                    962:        case PRU_DETACH:
1.31      mycroft   963:                in_pcbdetach(inp);
1.1       cgd       964:                break;
                    965:
                    966:        case PRU_BIND:
1.31      mycroft   967:                error = in_pcbbind(inp, nam, p);
1.1       cgd       968:                break;
                    969:
                    970:        case PRU_LISTEN:
                    971:                error = EOPNOTSUPP;
                    972:                break;
                    973:
                    974:        case PRU_CONNECT:
1.31      mycroft   975:                error = in_pcbconnect(inp, nam);
                    976:                if (error)
1.1       cgd       977:                        break;
1.31      mycroft   978:                soisconnected(so);
1.1       cgd       979:                break;
                    980:
                    981:        case PRU_CONNECT2:
                    982:                error = EOPNOTSUPP;
                    983:                break;
                    984:
                    985:        case PRU_DISCONNECT:
1.31      mycroft   986:                /*soisdisconnected(so);*/
                    987:                so->so_state &= ~SS_ISCONNECTED;        /* XXX */
1.1       cgd       988:                in_pcbdisconnect(inp);
1.34      mycroft   989:                inp->inp_laddr = zeroin_addr;           /* XXX */
1.35      mycroft   990:                in_pcbstate(inp, INP_BOUND);            /* XXX */
1.1       cgd       991:                break;
                    992:
                    993:        case PRU_SHUTDOWN:
                    994:                socantsendmore(so);
                    995:                break;
                    996:
1.31      mycroft   997:        case PRU_RCVD:
                    998:                error = EOPNOTSUPP;
1.1       cgd       999:                break;
                   1000:
1.31      mycroft  1001:        case PRU_SEND:
1.32      mycroft  1002:                if (control && control->m_len) {
                   1003:                        m_freem(control);
                   1004:                        m_freem(m);
                   1005:                        error = EINVAL;
                   1006:                        break;
                   1007:                }
1.31      mycroft  1008:        {
1.35      mycroft  1009:                struct in_addr laddr;                   /* XXX */
1.1       cgd      1010:
1.31      mycroft  1011:                if (nam) {
1.35      mycroft  1012:                        laddr = inp->inp_laddr;         /* XXX */
1.31      mycroft  1013:                        if ((so->so_state & SS_ISCONNECTED) != 0) {
                   1014:                                error = EISCONN;
1.32      mycroft  1015:                                goto die;
1.31      mycroft  1016:                        }
                   1017:                        error = in_pcbconnect(inp, nam);
1.100     matt     1018:                        if (error)
                   1019:                                goto die;
1.31      mycroft  1020:                } else {
                   1021:                        if ((so->so_state & SS_ISCONNECTED) == 0) {
                   1022:                                error = ENOTCONN;
1.32      mycroft  1023:                                goto die;
1.31      mycroft  1024:                        }
                   1025:                }
1.33      mycroft  1026:                error = udp_output(m, inp);
1.100     matt     1027:                m = NULL;
1.31      mycroft  1028:                if (nam) {
                   1029:                        in_pcbdisconnect(inp);
1.35      mycroft  1030:                        inp->inp_laddr = laddr;         /* XXX */
                   1031:                        in_pcbstate(inp, INP_BOUND);    /* XXX */
1.31      mycroft  1032:                }
1.100     matt     1033:          die:
                   1034:                if (m)
                   1035:                        m_freem(m);
1.31      mycroft  1036:        }
1.1       cgd      1037:                break;
                   1038:
                   1039:        case PRU_SENSE:
                   1040:                /*
                   1041:                 * stat: don't bother with a blocksize.
                   1042:                 */
1.31      mycroft  1043:                splx(s);
1.1       cgd      1044:                return (0);
                   1045:
1.31      mycroft  1046:        case PRU_RCVOOB:
                   1047:                error =  EOPNOTSUPP;
                   1048:                break;
                   1049:
1.1       cgd      1050:        case PRU_SENDOOB:
1.32      mycroft  1051:                m_freem(control);
1.31      mycroft  1052:                m_freem(m);
1.1       cgd      1053:                error =  EOPNOTSUPP;
                   1054:                break;
                   1055:
1.31      mycroft  1056:        case PRU_SOCKADDR:
                   1057:                in_setsockaddr(inp, nam);
                   1058:                break;
                   1059:
                   1060:        case PRU_PEERADDR:
                   1061:                in_setpeeraddr(inp, nam);
                   1062:                break;
1.1       cgd      1063:
                   1064:        default:
                   1065:                panic("udp_usrreq");
                   1066:        }
                   1067:
                   1068: release:
1.31      mycroft  1069:        splx(s);
1.1       cgd      1070:        return (error);
1.13      mycroft  1071: }
                   1072:
                   1073: /*
                   1074:  * Sysctl for udp variables.
                   1075:  */
1.114     atatat   1076: SYSCTL_SETUP(sysctl_net_inet_udp_setup, "sysctl net.inet.udp subtree setup")
1.13      mycroft  1077: {
1.114     atatat   1078:
1.116     atatat   1079:        sysctl_createv(clog, 0, NULL, NULL,
                   1080:                       CTLFLAG_PERMANENT,
1.114     atatat   1081:                       CTLTYPE_NODE, "net", NULL,
                   1082:                       NULL, 0, NULL, 0,
                   1083:                       CTL_NET, CTL_EOL);
1.116     atatat   1084:        sysctl_createv(clog, 0, NULL, NULL,
                   1085:                       CTLFLAG_PERMANENT,
1.114     atatat   1086:                       CTLTYPE_NODE, "inet", NULL,
                   1087:                       NULL, 0, NULL, 0,
                   1088:                       CTL_NET, PF_INET, CTL_EOL);
1.116     atatat   1089:        sysctl_createv(clog, 0, NULL, NULL,
                   1090:                       CTLFLAG_PERMANENT,
1.114     atatat   1091:                       CTLTYPE_NODE, "udp", NULL,
                   1092:                       NULL, 0, NULL, 0,
                   1093:                       CTL_NET, PF_INET, IPPROTO_UDP, CTL_EOL);
                   1094:
1.116     atatat   1095:        sysctl_createv(clog, 0, NULL, NULL,
                   1096:                       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.114     atatat   1097:                       CTLTYPE_INT, "checksum", NULL,
                   1098:                       NULL, 0, &udpcksum, 0,
                   1099:                       CTL_NET, PF_INET, IPPROTO_UDP, UDPCTL_CHECKSUM,
                   1100:                       CTL_EOL);
1.116     atatat   1101:        sysctl_createv(clog, 0, NULL, NULL,
                   1102:                       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.114     atatat   1103:                       CTLTYPE_INT, "sendspace", NULL,
                   1104:                       NULL, 0, &udp_sendspace, 0,
                   1105:                       CTL_NET, PF_INET, IPPROTO_UDP, UDPCTL_SENDSPACE,
                   1106:                       CTL_EOL);
1.116     atatat   1107:        sysctl_createv(clog, 0, NULL, NULL,
                   1108:                       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.114     atatat   1109:                       CTLTYPE_INT, "recvspace", NULL,
                   1110:                       NULL, 0, &udp_recvspace, 0,
                   1111:                       CTL_NET, PF_INET, IPPROTO_UDP, UDPCTL_RECVSPACE,
                   1112:                       CTL_EOL);
1.1       cgd      1113: }
1.72      itojun   1114: #endif

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