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Annotation of src/sys/netinet/raw_ip.c, Revision 1.66

1.66    ! thorpej     1: /*     $NetBSD: raw_ip.c,v 1.65 2002/11/07 17:49:08 thorpej Exp $      */
1.43      itojun      2:
                      3: /*
                      4:  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
                      5:  * All rights reserved.
1.61      itojun      6:  *
1.43      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.
1.61      itojun     18:  *
1.43      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: /*
1.13      mycroft    33:  * Copyright (c) 1982, 1986, 1988, 1993
                     34:  *     The Regents of the University of California.  All rights reserved.
1.1       cgd        35:  *
                     36:  * Redistribution and use in source and binary forms, with or without
                     37:  * modification, are permitted provided that the following conditions
                     38:  * are met:
                     39:  * 1. Redistributions of source code must retain the above copyright
                     40:  *    notice, this list of conditions and the following disclaimer.
                     41:  * 2. Redistributions in binary form must reproduce the above copyright
                     42:  *    notice, this list of conditions and the following disclaimer in the
                     43:  *    documentation and/or other materials provided with the distribution.
                     44:  * 3. All advertising materials mentioning features or use of this software
                     45:  *    must display the following acknowledgement:
                     46:  *     This product includes software developed by the University of
                     47:  *     California, Berkeley and its contributors.
                     48:  * 4. Neither the name of the University nor the names of its contributors
                     49:  *    may be used to endorse or promote products derived from this software
                     50:  *    without specific prior written permission.
                     51:  *
                     52:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     53:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     54:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     55:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     56:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     57:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     58:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     59:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     60:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     61:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     62:  * SUCH DAMAGE.
                     63:  *
1.39      thorpej    64:  *     @(#)raw_ip.c    8.7 (Berkeley) 5/15/95
1.1       cgd        65:  */
1.59      lukem      66:
                     67: #include <sys/cdefs.h>
1.66    ! thorpej    68: __KERNEL_RCSID(0, "$NetBSD: raw_ip.c,v 1.65 2002/11/07 17:49:08 thorpej Exp $");
1.40      scottr     69:
1.45      thorpej    70: #include "opt_ipsec.h"
1.40      scottr     71: #include "opt_mrouting.h"
1.1       cgd        72:
1.7       mycroft    73: #include <sys/param.h>
                     74: #include <sys/malloc.h>
                     75: #include <sys/mbuf.h>
                     76: #include <sys/socket.h>
                     77: #include <sys/protosw.h>
                     78: #include <sys/socketvar.h>
                     79: #include <sys/errno.h>
1.13      mycroft    80: #include <sys/systm.h>
1.26      mycroft    81: #include <sys/proc.h>
1.1       cgd        82:
1.7       mycroft    83: #include <net/if.h>
                     84: #include <net/route.h>
1.1       cgd        85:
1.7       mycroft    86: #include <netinet/in.h>
                     87: #include <netinet/in_systm.h>
                     88: #include <netinet/ip.h>
                     89: #include <netinet/ip_var.h>
1.13      mycroft    90: #include <netinet/ip_mroute.h>
1.44      darrenr    91: #include <netinet/ip_icmp.h>
1.7       mycroft    92: #include <netinet/in_pcb.h>
1.24      christos   93: #include <netinet/in_var.h>
                     94:
                     95: #include <machine/stdarg.h>
1.13      mycroft    96:
1.43      itojun     97: #ifdef IPSEC
                     98: #include <netinet6/ipsec.h>
                     99: #endif /*IPSEC*/
                    100:
1.20      mycroft   101: struct inpcbtable rawcbtable;
1.30      pk        102:
1.60      itojun    103: int     rip_pcbnotify __P((struct inpcbtable *, struct in_addr,
                    104:     struct in_addr, int, int, void (*) __P((struct inpcb *, int))));
1.30      pk        105: int     rip_bind __P((struct inpcb *, struct mbuf *));
                    106: int     rip_connect __P((struct inpcb *, struct mbuf *));
                    107: void    rip_disconnect __P((struct inpcb *));
1.13      mycroft   108:
                    109: /*
                    110:  * Nominal space allocated to a raw ip socket.
                    111:  */
                    112: #define        RIPSNDQ         8192
                    113: #define        RIPRCVQ         8192
1.1       cgd       114:
                    115: /*
                    116:  * Raw interface to IP protocol.
                    117:  */
1.13      mycroft   118:
                    119: /*
                    120:  * Initialize raw connection block q.
                    121:  */
                    122: void
                    123: rip_init()
                    124: {
                    125:
1.33      mycroft   126:        in_pcbinit(&rawcbtable, 1, 1);
1.13      mycroft   127: }
                    128:
1.1       cgd       129: /*
                    130:  * Setup generic address and protocol structures
                    131:  * for raw_input routine, then pass them along with
                    132:  * mbuf chain.
                    133:  */
1.9       mycroft   134: void
1.24      christos  135: #if __STDC__
                    136: rip_input(struct mbuf *m, ...)
                    137: #else
                    138: rip_input(m, va_alist)
1.1       cgd       139:        struct mbuf *m;
1.24      christos  140:        va_dcl
                    141: #endif
1.1       cgd       142: {
1.63      simonb    143:        int proto;
1.53      augustss  144:        struct ip *ip = mtod(m, struct ip *);
                    145:        struct inpcb *inp;
1.36      thorpej   146:        struct inpcb *last = 0;
                    147:        struct mbuf *opts = 0;
1.32      mycroft   148:        struct sockaddr_in ripsrc;
1.43      itojun    149:        va_list ap;
                    150:
                    151:        va_start(ap, m);
1.64      simonb    152:        (void)va_arg(ap, int);          /* ignore value, advance ap */
1.43      itojun    153:        proto = va_arg(ap, int);
                    154:        va_end(ap);
1.1       cgd       155:
1.32      mycroft   156:        ripsrc.sin_family = AF_INET;
                    157:        ripsrc.sin_len = sizeof(struct sockaddr_in);
1.1       cgd       158:        ripsrc.sin_addr = ip->ip_src;
1.34      mycroft   159:        ripsrc.sin_port = 0;
                    160:        bzero((caddr_t)ripsrc.sin_zero, sizeof(ripsrc.sin_zero));
1.42      thorpej   161:
                    162:        /*
                    163:         * XXX Compatibility: programs using raw IP expect ip_len
1.62      itojun    164:         * XXX to have the header length subtracted, and in host order.
                    165:         * XXX ip_off is also expected to be host order.
1.42      thorpej   166:         */
1.62      itojun    167:        ip->ip_len = ntohs(ip->ip_len) - (ip->ip_hl << 2);
                    168:        NTOHS(ip->ip_off);
1.32      mycroft   169:
1.58      matt      170:        CIRCLEQ_FOREACH(inp, &rawcbtable.inpt_queue, inp_queue) {
1.43      itojun    171:                if (inp->inp_ip.ip_p && inp->inp_ip.ip_p != proto)
1.13      mycroft   172:                        continue;
1.32      mycroft   173:                if (!in_nullhost(inp->inp_laddr) &&
                    174:                    !in_hosteq(inp->inp_laddr, ip->ip_dst))
1.13      mycroft   175:                        continue;
1.32      mycroft   176:                if (!in_nullhost(inp->inp_faddr) &&
                    177:                    !in_hosteq(inp->inp_faddr, ip->ip_src))
1.13      mycroft   178:                        continue;
                    179:                if (last) {
                    180:                        struct mbuf *n;
1.55      itojun    181:
                    182: #ifdef IPSEC
                    183:                        /* check AH/ESP integrity. */
                    184:                        if (ipsec4_in_reject_so(m, last->inp_socket)) {
                    185:                                ipsecstat.in_polvio++;
                    186:                                /* do not inject data to pcb */
                    187:                        } else
                    188: #endif /*IPSEC*/
1.24      christos  189:                        if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) {
1.36      thorpej   190:                                if (last->inp_flags & INP_CONTROLOPTS ||
                    191:                                    last->inp_socket->so_options & SO_TIMESTAMP)
                    192:                                        ip_savecontrol(last, &opts, ip, n);
                    193:                                if (sbappendaddr(&last->inp_socket->so_rcv,
                    194:                                    sintosa(&ripsrc), n, opts) == 0) {
1.13      mycroft   195:                                        /* should notify about lost packet */
                    196:                                        m_freem(n);
1.36      thorpej   197:                                        if (opts)
                    198:                                                m_freem(opts);
                    199:                                } else
                    200:                                        sorwakeup(last->inp_socket);
1.41      thorpej   201:                                opts = NULL;
1.13      mycroft   202:                        }
                    203:                }
1.36      thorpej   204:                last = inp;
1.13      mycroft   205:        }
1.55      itojun    206: #ifdef IPSEC
                    207:        /* check AH/ESP integrity. */
                    208:        if (last && ipsec4_in_reject_so(m, last->inp_socket)) {
                    209:                m_freem(m);
                    210:                ipsecstat.in_polvio++;
                    211:                ipstat.ips_delivered--;
                    212:                /* do not inject data to pcb */
                    213:        } else
                    214: #endif /*IPSEC*/
1.13      mycroft   215:        if (last) {
1.36      thorpej   216:                if (last->inp_flags & INP_CONTROLOPTS ||
                    217:                    last->inp_socket->so_options & SO_TIMESTAMP)
                    218:                        ip_savecontrol(last, &opts, ip, m);
                    219:                if (sbappendaddr(&last->inp_socket->so_rcv,
                    220:                    sintosa(&ripsrc), m, opts) == 0) {
1.13      mycroft   221:                        m_freem(m);
1.36      thorpej   222:                        if (opts)
                    223:                                m_freem(opts);
                    224:                } else
                    225:                        sorwakeup(last->inp_socket);
1.13      mycroft   226:        } else {
1.44      darrenr   227:                if (inetsw[ip_protox[ip->ip_p]].pr_input == rip_input) {
1.47      itojun    228:                        icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PROTOCOL,
                    229:                            0, 0);
1.44      darrenr   230:                        ipstat.ips_noproto++;
                    231:                        ipstat.ips_delivered--;
                    232:                } else
                    233:                        m_freem(m);
1.1       cgd       234:        }
1.43      itojun    235:        return;
1.60      itojun    236: }
                    237:
                    238: int
                    239: rip_pcbnotify(table, faddr, laddr, proto, errno, notify)
                    240:        struct inpcbtable *table;
                    241:        struct in_addr faddr, laddr;
                    242:        int proto;
                    243:        int errno;
                    244:        void (*notify) __P((struct inpcb *, int));
                    245: {
                    246:        struct inpcb *inp, *ninp;
                    247:        int nmatch;
                    248:
                    249:        nmatch = 0;
                    250:        for (inp = CIRCLEQ_FIRST(&table->inpt_queue);
                    251:            inp != (struct inpcb *)&table->inpt_queue;
                    252:            inp = ninp) {
                    253:                ninp = inp->inp_queue.cqe_next;
                    254:                if (inp->inp_ip.ip_p && inp->inp_ip.ip_p != proto)
                    255:                        continue;
                    256:                if (in_hosteq(inp->inp_faddr, faddr) &&
                    257:                    in_hosteq(inp->inp_laddr, laddr)) {
                    258:                        (*notify)(inp, errno);
                    259:                        nmatch++;
                    260:                }
                    261:        }
                    262:
                    263:        return nmatch;
                    264: }
                    265:
                    266: void *
                    267: rip_ctlinput(cmd, sa, v)
                    268:        int cmd;
                    269:        struct sockaddr *sa;
                    270:        void *v;
                    271: {
                    272:        struct ip *ip = v;
                    273:        void (*notify) __P((struct inpcb *, int)) = in_rtchange;
                    274:        int errno;
                    275:
                    276:        if (sa->sa_family != AF_INET ||
                    277:            sa->sa_len != sizeof(struct sockaddr_in))
                    278:                return NULL;
                    279:        if ((unsigned)cmd >= PRC_NCMDS)
                    280:                return NULL;
                    281:        errno = inetctlerrmap[cmd];
                    282:        if (PRC_IS_REDIRECT(cmd))
                    283:                notify = in_rtchange, ip = 0;
                    284:        else if (cmd == PRC_HOSTDEAD)
                    285:                ip = 0;
                    286:        else if (errno == 0)
                    287:                return NULL;
                    288:        if (ip) {
                    289:                rip_pcbnotify(&rawcbtable, satosin(sa)->sin_addr,
                    290:                    ip->ip_src, ip->ip_p, errno, notify);
                    291:
                    292:                /* XXX mapped address case */
                    293:        } else
                    294:                in_pcbnotifyall(&rawcbtable, satosin(sa)->sin_addr, errno,
                    295:                    notify);
                    296:        return NULL;
1.1       cgd       297: }
                    298:
                    299: /*
                    300:  * Generate IP header and pass packet to ip_output.
                    301:  * Tack on options user may have setup with control call.
                    302:  */
1.9       mycroft   303: int
1.24      christos  304: #if __STDC__
                    305: rip_output(struct mbuf *m, ...)
                    306: #else
                    307: rip_output(m, va_alist)
                    308:        struct mbuf *m;
                    309:        va_dcl
                    310: #endif
                    311: {
1.53      augustss  312:        struct inpcb *inp;
                    313:        struct ip *ip;
1.10      mycroft   314:        struct mbuf *opts;
1.24      christos  315:        int flags;
                    316:        va_list ap;
                    317:
                    318:        va_start(ap, m);
1.27      mycroft   319:        inp = va_arg(ap, struct inpcb *);
1.24      christos  320:        va_end(ap);
                    321:
1.27      mycroft   322:        flags =
1.37      matt      323:            (inp->inp_socket->so_options & SO_DONTROUTE) | IP_ALLOWBROADCAST
                    324:            | IP_RETURNMTU;
1.1       cgd       325:
                    326:        /*
                    327:         * If the user handed us a complete IP packet, use it.
                    328:         * Otherwise, allocate an mbuf for a header and fill it in.
                    329:         */
1.13      mycroft   330:        if ((inp->inp_flags & INP_HDRINCL) == 0) {
1.35      thorpej   331:                if ((m->m_pkthdr.len + sizeof(struct ip)) > IP_MAXPACKET) {
                    332:                        m_freem(m);
                    333:                        return (EMSGSIZE);
                    334:                }
1.1       cgd       335:                M_PREPEND(m, sizeof(struct ip), M_WAIT);
                    336:                ip = mtod(m, struct ip *);
                    337:                ip->ip_tos = 0;
1.62      itojun    338:                ip->ip_off = htons(0);
1.13      mycroft   339:                ip->ip_p = inp->inp_ip.ip_p;
1.62      itojun    340:                ip->ip_len = htons(m->m_pkthdr.len);
1.13      mycroft   341:                ip->ip_src = inp->inp_laddr;
1.27      mycroft   342:                ip->ip_dst = inp->inp_faddr;
1.1       cgd       343:                ip->ip_ttl = MAXTTL;
1.13      mycroft   344:                opts = inp->inp_options;
                    345:        } else {
1.35      thorpej   346:                if (m->m_pkthdr.len > IP_MAXPACKET) {
                    347:                        m_freem(m);
                    348:                        return (EMSGSIZE);
                    349:                }
1.13      mycroft   350:                ip = mtod(m, struct ip *);
1.65      thorpej   351:
                    352:                /*
                    353:                 * If the mbuf is read-only, we need to allocate
                    354:                 * a new mbuf for the header, since we need to
                    355:                 * modify the header.
                    356:                 */
                    357:                if (M_READONLY(m)) {
                    358:                        int hlen = ip->ip_hl << 2;
                    359:
                    360:                        m = m_copyup(m, hlen, (max_linkhdr + 3) & ~3);
                    361:                        if (m == NULL)
                    362:                                return (ENOMEM);        /* XXX */
                    363:                        ip = mtod(m, struct ip *);
                    364:                }
                    365:
1.62      itojun    366:                /* XXX userland passes ip_len and ip_off in host order */
1.38      mycroft   367:                if (m->m_pkthdr.len != ip->ip_len) {
                    368:                        m_freem(m);
                    369:                        return (EINVAL);
                    370:                }
1.62      itojun    371:                HTONS(ip->ip_len);
                    372:                HTONS(ip->ip_off);
1.13      mycroft   373:                if (ip->ip_id == 0)
                    374:                        ip->ip_id = htons(ip_id++);
                    375:                opts = NULL;
                    376:                /* XXX prevent ip_output from overwriting header fields */
                    377:                flags |= IP_RAWOUTPUT;
                    378:                ipstat.ips_rawout++;
1.1       cgd       379:        }
1.43      itojun    380: #ifdef IPSEC
1.54      itojun    381:        if (ipsec_setsocket(m, inp->inp_socket) != 0) {
                    382:                m_freem(m);
                    383:                return ENOBUFS;
                    384:        }
1.43      itojun    385: #endif /*IPSEC*/
1.62      itojun    386:        return (ip_output(m, opts, &inp->inp_route, flags, inp->inp_moptions,
                    387:            &inp->inp_errormtu));
1.1       cgd       388: }
                    389:
                    390: /*
                    391:  * Raw IP socket option processing.
                    392:  */
1.9       mycroft   393: int
1.1       cgd       394: rip_ctloutput(op, so, level, optname, m)
                    395:        int op;
                    396:        struct socket *so;
                    397:        int level, optname;
                    398:        struct mbuf **m;
                    399: {
1.53      augustss  400:        struct inpcb *inp = sotoinpcb(so);
1.31      mycroft   401:        int error = 0;
1.1       cgd       402:
1.15      mycroft   403:        if (level != IPPROTO_IP) {
1.31      mycroft   404:                error = ENOPROTOOPT;
                    405:                if (op == PRCO_SETOPT && *m != 0)
                    406:                        (void) m_free(*m);
                    407:        } else switch (op) {
                    408:
                    409:        case PRCO_SETOPT:
                    410:                switch (optname) {
                    411:                case IP_HDRINCL:
                    412:                        if (*m == 0 || (*m)->m_len < sizeof (int))
                    413:                                error = EINVAL;
                    414:                        else {
1.13      mycroft   415:                                if (*mtod(*m, int *))
                    416:                                        inp->inp_flags |= INP_HDRINCL;
                    417:                                else
                    418:                                        inp->inp_flags &= ~INP_HDRINCL;
                    419:                        }
1.31      mycroft   420:                        if (*m != 0)
                    421:                                (void) m_free(*m);
                    422:                        break;
                    423:
                    424: #ifdef MROUTING
                    425:                case MRT_INIT:
                    426:                case MRT_DONE:
                    427:                case MRT_ADD_VIF:
                    428:                case MRT_DEL_VIF:
                    429:                case MRT_ADD_MFC:
                    430:                case MRT_DEL_MFC:
                    431:                case MRT_ASSERT:
                    432:                        error = ip_mrouter_set(so, optname, m);
                    433:                        break;
                    434: #endif
                    435:
                    436:                default:
                    437:                        error = ip_ctloutput(op, so, level, optname, m);
                    438:                        break;
1.13      mycroft   439:                }
                    440:                break;
1.1       cgd       441:
1.31      mycroft   442:        case PRCO_GETOPT:
                    443:                switch (optname) {
                    444:                case IP_HDRINCL:
1.66    ! thorpej   445:                        *m = m_get(M_WAIT, MT_SOOPTS);
1.31      mycroft   446:                        (*m)->m_len = sizeof (int);
                    447:                        *mtod(*m, int *) = inp->inp_flags & INP_HDRINCL ? 1 : 0;
                    448:                        break;
                    449:
1.6       hpeyerl   450: #ifdef MROUTING
1.31      mycroft   451:                case MRT_VERSION:
                    452:                case MRT_ASSERT:
                    453:                        error = ip_mrouter_get(so, optname, m);
1.18      mycroft   454:                        break;
1.31      mycroft   455: #endif
                    456:
1.18      mycroft   457:                default:
1.31      mycroft   458:                        error = ip_ctloutput(op, so, level, optname, m);
1.18      mycroft   459:                        break;
                    460:                }
1.31      mycroft   461:                break;
1.1       cgd       462:        }
1.31      mycroft   463:        return (error);
1.1       cgd       464: }
                    465:
1.27      mycroft   466: int
1.29      mycroft   467: rip_bind(inp, nam)
                    468:        struct inpcb *inp;
                    469:        struct mbuf *nam;
                    470: {
                    471:        struct sockaddr_in *addr = mtod(nam, struct sockaddr_in *);
                    472:
                    473:        if (nam->m_len != sizeof(*addr))
                    474:                return (EINVAL);
1.58      matt      475:        if (TAILQ_FIRST(&ifnet) == 0)
1.29      mycroft   476:                return (EADDRNOTAVAIL);
                    477:        if (addr->sin_family != AF_INET &&
                    478:            addr->sin_family != AF_IMPLINK)
                    479:                return (EAFNOSUPPORT);
1.32      mycroft   480:        if (!in_nullhost(addr->sin_addr) &&
1.29      mycroft   481:            ifa_ifwithaddr(sintosa(addr)) == 0)
                    482:                return (EADDRNOTAVAIL);
                    483:        inp->inp_laddr = addr->sin_addr;
                    484:        return (0);
                    485: }
                    486:
                    487: int
1.27      mycroft   488: rip_connect(inp, nam)
                    489:        struct inpcb *inp;
                    490:        struct mbuf *nam;
                    491: {
                    492:        struct sockaddr_in *addr = mtod(nam, struct sockaddr_in *);
                    493:
                    494:        if (nam->m_len != sizeof(*addr))
                    495:                return (EINVAL);
1.58      matt      496:        if (TAILQ_FIRST(&ifnet) == 0)
1.27      mycroft   497:                return (EADDRNOTAVAIL);
                    498:        if (addr->sin_family != AF_INET &&
                    499:            addr->sin_family != AF_IMPLINK)
                    500:                return (EAFNOSUPPORT);
                    501:        inp->inp_faddr = addr->sin_addr;
                    502:        return (0);
                    503: }
                    504:
                    505: void
                    506: rip_disconnect(inp)
                    507:        struct inpcb *inp;
                    508: {
                    509:
1.32      mycroft   510:        inp->inp_faddr = zeroin_addr;
1.27      mycroft   511: }
                    512:
1.13      mycroft   513: u_long rip_sendspace = RIPSNDQ;
                    514: u_long rip_recvspace = RIPRCVQ;
                    515:
1.1       cgd       516: /*ARGSUSED*/
1.9       mycroft   517: int
1.26      mycroft   518: rip_usrreq(so, req, m, nam, control, p)
1.53      augustss  519:        struct socket *so;
1.1       cgd       520:        int req;
1.2       cgd       521:        struct mbuf *m, *nam, *control;
1.26      mycroft   522:        struct proc *p;
1.1       cgd       523: {
1.53      augustss  524:        struct inpcb *inp;
1.27      mycroft   525:        int s;
1.53      augustss  526:        int error = 0;
1.13      mycroft   527: #ifdef MROUTING
1.6       hpeyerl   528:        extern struct socket *ip_mrouter;
                    529: #endif
1.27      mycroft   530:
1.22      pk        531:        if (req == PRU_CONTROL)
                    532:                return (in_control(so, (long)m, (caddr_t)nam,
1.26      mycroft   533:                    (struct ifnet *)control, p));
1.49      thorpej   534:
1.50      thorpej   535:        if (req == PRU_PURGEIF) {
1.56      itojun    536:                in_pcbpurgeif0(&rawcbtable, (struct ifnet *)control);
1.50      thorpej   537:                in_purgeif((struct ifnet *)control);
                    538:                in_pcbpurgeif(&rawcbtable, (struct ifnet *)control);
1.49      thorpej   539:                return (0);
                    540:        }
1.22      pk        541:
1.27      mycroft   542:        s = splsoftnet();
                    543:        inp = sotoinpcb(so);
1.28      mycroft   544: #ifdef DIAGNOSTIC
                    545:        if (req != PRU_SEND && req != PRU_SENDOOB && control)
                    546:                panic("rip_usrreq: unexpected control mbuf");
                    547: #endif
1.27      mycroft   548:        if (inp == 0 && req != PRU_ATTACH) {
1.22      pk        549:                error = EINVAL;
                    550:                goto release;
                    551:        }
                    552:
1.1       cgd       553:        switch (req) {
                    554:
                    555:        case PRU_ATTACH:
1.27      mycroft   556:                if (inp != 0) {
                    557:                        error = EISCONN;
                    558:                        break;
                    559:                }
1.26      mycroft   560:                if (p == 0 || (error = suser(p->p_ucred, &p->p_acflag))) {
1.13      mycroft   561:                        error = EACCES;
                    562:                        break;
                    563:                }
1.27      mycroft   564:                if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
                    565:                        error = soreserve(so, rip_sendspace, rip_recvspace);
                    566:                        if (error)
                    567:                                break;
                    568:                }
                    569:                error = in_pcballoc(so, &rawcbtable);
                    570:                if (error)
1.13      mycroft   571:                        break;
1.27      mycroft   572:                inp = sotoinpcb(so);
1.17      cgd       573:                inp->inp_ip.ip_p = (long)nam;
1.1       cgd       574:                break;
                    575:
                    576:        case PRU_DETACH:
1.13      mycroft   577: #ifdef MROUTING
1.6       hpeyerl   578:                if (so == ip_mrouter)
                    579:                        ip_mrouter_done();
                    580: #endif
1.13      mycroft   581:                in_pcbdetach(inp);
1.1       cgd       582:                break;
                    583:
                    584:        case PRU_BIND:
1.29      mycroft   585:                error = rip_bind(inp, nam);
1.27      mycroft   586:                break;
                    587:
                    588:        case PRU_LISTEN:
                    589:                error = EOPNOTSUPP;
                    590:                break;
                    591:
                    592:        case PRU_CONNECT:
                    593:                error = rip_connect(inp, nam);
                    594:                if (error)
1.13      mycroft   595:                        break;
1.1       cgd       596:                soisconnected(so);
1.13      mycroft   597:                break;
                    598:
                    599:        case PRU_CONNECT2:
                    600:                error = EOPNOTSUPP;
                    601:                break;
                    602:
1.27      mycroft   603:        case PRU_DISCONNECT:
                    604:                soisdisconnected(so);
                    605:                rip_disconnect(inp);
                    606:                break;
                    607:
1.13      mycroft   608:        /*
                    609:         * Mark the connection as being incapable of further input.
                    610:         */
                    611:        case PRU_SHUTDOWN:
                    612:                socantsendmore(so);
                    613:                break;
                    614:
1.27      mycroft   615:        case PRU_RCVD:
                    616:                error = EOPNOTSUPP;
                    617:                break;
                    618:
1.13      mycroft   619:        /*
                    620:         * Ship a packet out.  The appropriate raw output
                    621:         * routine handles any massaging necessary.
                    622:         */
                    623:        case PRU_SEND:
1.28      mycroft   624:                if (control && control->m_len) {
                    625:                        m_freem(control);
                    626:                        m_freem(m);
                    627:                        error = EINVAL;
                    628:                        break;
                    629:                }
                    630:        {
1.27      mycroft   631:                if (nam) {
                    632:                        if ((so->so_state & SS_ISCONNECTED) != 0) {
1.13      mycroft   633:                                error = EISCONN;
1.28      mycroft   634:                                goto die;
1.13      mycroft   635:                        }
1.27      mycroft   636:                        error = rip_connect(inp, nam);
                    637:                        if (error) {
1.28      mycroft   638:                        die:
1.27      mycroft   639:                                m_freem(m);
                    640:                                break;
                    641:                        }
1.13      mycroft   642:                } else {
1.27      mycroft   643:                        if ((so->so_state & SS_ISCONNECTED) == 0) {
1.13      mycroft   644:                                error = ENOTCONN;
1.28      mycroft   645:                                goto die;
1.13      mycroft   646:                        }
                    647:                }
1.27      mycroft   648:                error = rip_output(m, inp);
                    649:                if (nam)
                    650:                        rip_disconnect(inp);
1.28      mycroft   651:        }
1.13      mycroft   652:                break;
                    653:
                    654:        case PRU_SENSE:
                    655:                /*
                    656:                 * stat: don't bother with a blocksize.
                    657:                 */
1.27      mycroft   658:                splx(s);
1.1       cgd       659:                return (0);
1.13      mycroft   660:
                    661:        case PRU_RCVOOB:
1.27      mycroft   662:                error = EOPNOTSUPP;
                    663:                break;
                    664:
1.13      mycroft   665:        case PRU_SENDOOB:
1.28      mycroft   666:                m_freem(control);
1.27      mycroft   667:                m_freem(m);
1.13      mycroft   668:                error = EOPNOTSUPP;
                    669:                break;
                    670:
                    671:        case PRU_SOCKADDR:
                    672:                in_setsockaddr(inp, nam);
                    673:                break;
                    674:
                    675:        case PRU_PEERADDR:
                    676:                in_setpeeraddr(inp, nam);
                    677:                break;
                    678:
                    679:        default:
                    680:                panic("rip_usrreq");
1.1       cgd       681:        }
1.27      mycroft   682:
1.22      pk        683: release:
1.27      mycroft   684:        splx(s);
1.1       cgd       685:        return (error);
                    686: }

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