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Annotation of src/sys/netinet/raw_ip.c, Revision 1.78.2.1

1.78.2.1! tron        1: /*     $NetBSD$        */
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.
1.71      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:  *
1.39      thorpej    60:  *     @(#)raw_ip.c    8.7 (Berkeley) 5/15/95
1.1       cgd        61:  */
1.59      lukem      62:
                     63: #include <sys/cdefs.h>
1.78.2.1! tron       64: __KERNEL_RCSID(0, "$NetBSD$");
1.40      scottr     65:
1.78      jonathan   66: #include "opt_inet.h"
1.45      thorpej    67: #include "opt_ipsec.h"
1.40      scottr     68: #include "opt_mrouting.h"
1.1       cgd        69:
1.7       mycroft    70: #include <sys/param.h>
                     71: #include <sys/malloc.h>
                     72: #include <sys/mbuf.h>
                     73: #include <sys/socket.h>
                     74: #include <sys/protosw.h>
                     75: #include <sys/socketvar.h>
                     76: #include <sys/errno.h>
1.13      mycroft    77: #include <sys/systm.h>
1.26      mycroft    78: #include <sys/proc.h>
1.1       cgd        79:
1.7       mycroft    80: #include <net/if.h>
                     81: #include <net/route.h>
1.1       cgd        82:
1.7       mycroft    83: #include <netinet/in.h>
                     84: #include <netinet/in_systm.h>
                     85: #include <netinet/ip.h>
                     86: #include <netinet/ip_var.h>
1.13      mycroft    87: #include <netinet/ip_mroute.h>
1.44      darrenr    88: #include <netinet/ip_icmp.h>
1.7       mycroft    89: #include <netinet/in_pcb.h>
1.24      christos   90: #include <netinet/in_var.h>
                     91:
                     92: #include <machine/stdarg.h>
1.13      mycroft    93:
1.43      itojun     94: #ifdef IPSEC
                     95: #include <netinet6/ipsec.h>
                     96: #endif /*IPSEC*/
                     97:
1.72      jonathan   98: #ifdef FAST_IPSEC
                     99: #include <netipsec/ipsec.h>
1.78.2.1! tron      100: #include <netipsec/ipsec_var.h>                        /* XXX ipsecstat namespace */
1.72      jonathan  101: #endif /* FAST_IPSEC*/
                    102:
1.20      mycroft   103: struct inpcbtable rawcbtable;
1.30      pk        104:
1.60      itojun    105: int     rip_pcbnotify __P((struct inpcbtable *, struct in_addr,
                    106:     struct in_addr, int, int, void (*) __P((struct inpcb *, int))));
1.30      pk        107: int     rip_bind __P((struct inpcb *, struct mbuf *));
                    108: int     rip_connect __P((struct inpcb *, struct mbuf *));
                    109: void    rip_disconnect __P((struct inpcb *));
1.13      mycroft   110:
                    111: /*
                    112:  * Nominal space allocated to a raw ip socket.
                    113:  */
                    114: #define        RIPSNDQ         8192
                    115: #define        RIPRCVQ         8192
1.1       cgd       116:
                    117: /*
                    118:  * Raw interface to IP protocol.
                    119:  */
1.13      mycroft   120:
                    121: /*
                    122:  * Initialize raw connection block q.
                    123:  */
                    124: void
                    125: rip_init()
                    126: {
                    127:
1.33      mycroft   128:        in_pcbinit(&rawcbtable, 1, 1);
1.13      mycroft   129: }
                    130:
1.1       cgd       131: /*
                    132:  * Setup generic address and protocol structures
                    133:  * for raw_input routine, then pass them along with
                    134:  * mbuf chain.
                    135:  */
1.9       mycroft   136: void
1.24      christos  137: #if __STDC__
                    138: rip_input(struct mbuf *m, ...)
                    139: #else
                    140: rip_input(m, va_alist)
1.1       cgd       141:        struct mbuf *m;
1.24      christos  142:        va_dcl
                    143: #endif
1.1       cgd       144: {
1.63      simonb    145:        int proto;
1.53      augustss  146:        struct ip *ip = mtod(m, struct ip *);
1.75      itojun    147:        struct inpcb_hdr *inph;
1.53      augustss  148:        struct inpcb *inp;
1.36      thorpej   149:        struct inpcb *last = 0;
                    150:        struct mbuf *opts = 0;
1.32      mycroft   151:        struct sockaddr_in ripsrc;
1.43      itojun    152:        va_list ap;
                    153:
                    154:        va_start(ap, m);
1.64      simonb    155:        (void)va_arg(ap, int);          /* ignore value, advance ap */
1.43      itojun    156:        proto = va_arg(ap, int);
                    157:        va_end(ap);
1.1       cgd       158:
1.32      mycroft   159:        ripsrc.sin_family = AF_INET;
                    160:        ripsrc.sin_len = sizeof(struct sockaddr_in);
1.1       cgd       161:        ripsrc.sin_addr = ip->ip_src;
1.34      mycroft   162:        ripsrc.sin_port = 0;
                    163:        bzero((caddr_t)ripsrc.sin_zero, sizeof(ripsrc.sin_zero));
1.42      thorpej   164:
                    165:        /*
                    166:         * XXX Compatibility: programs using raw IP expect ip_len
1.62      itojun    167:         * XXX to have the header length subtracted, and in host order.
                    168:         * XXX ip_off is also expected to be host order.
1.42      thorpej   169:         */
1.62      itojun    170:        ip->ip_len = ntohs(ip->ip_len) - (ip->ip_hl << 2);
                    171:        NTOHS(ip->ip_off);
1.32      mycroft   172:
1.75      itojun    173:        CIRCLEQ_FOREACH(inph, &rawcbtable.inpt_queue, inph_queue) {
                    174:                inp = (struct inpcb *)inph;
                    175:                if (inp->inp_af != AF_INET)
                    176:                        continue;
1.43      itojun    177:                if (inp->inp_ip.ip_p && inp->inp_ip.ip_p != proto)
1.13      mycroft   178:                        continue;
1.32      mycroft   179:                if (!in_nullhost(inp->inp_laddr) &&
                    180:                    !in_hosteq(inp->inp_laddr, ip->ip_dst))
1.13      mycroft   181:                        continue;
1.32      mycroft   182:                if (!in_nullhost(inp->inp_faddr) &&
                    183:                    !in_hosteq(inp->inp_faddr, ip->ip_src))
1.13      mycroft   184:                        continue;
                    185:                if (last) {
                    186:                        struct mbuf *n;
1.55      itojun    187:
1.72      jonathan  188: #if defined(IPSEC) || defined(FAST_IPSEC)
1.55      itojun    189:                        /* check AH/ESP integrity. */
                    190:                        if (ipsec4_in_reject_so(m, last->inp_socket)) {
                    191:                                ipsecstat.in_polvio++;
                    192:                                /* do not inject data to pcb */
                    193:                        } else
                    194: #endif /*IPSEC*/
1.24      christos  195:                        if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) {
1.36      thorpej   196:                                if (last->inp_flags & INP_CONTROLOPTS ||
                    197:                                    last->inp_socket->so_options & SO_TIMESTAMP)
                    198:                                        ip_savecontrol(last, &opts, ip, n);
                    199:                                if (sbappendaddr(&last->inp_socket->so_rcv,
                    200:                                    sintosa(&ripsrc), n, opts) == 0) {
1.13      mycroft   201:                                        /* should notify about lost packet */
                    202:                                        m_freem(n);
1.36      thorpej   203:                                        if (opts)
                    204:                                                m_freem(opts);
                    205:                                } else
                    206:                                        sorwakeup(last->inp_socket);
1.41      thorpej   207:                                opts = NULL;
1.13      mycroft   208:                        }
                    209:                }
1.36      thorpej   210:                last = inp;
1.13      mycroft   211:        }
1.72      jonathan  212: #if defined(IPSEC) || defined(FAST_IPSEC)
1.55      itojun    213:        /* check AH/ESP integrity. */
                    214:        if (last && ipsec4_in_reject_so(m, last->inp_socket)) {
                    215:                m_freem(m);
                    216:                ipsecstat.in_polvio++;
                    217:                ipstat.ips_delivered--;
                    218:                /* do not inject data to pcb */
                    219:        } else
                    220: #endif /*IPSEC*/
1.13      mycroft   221:        if (last) {
1.36      thorpej   222:                if (last->inp_flags & INP_CONTROLOPTS ||
                    223:                    last->inp_socket->so_options & SO_TIMESTAMP)
                    224:                        ip_savecontrol(last, &opts, ip, m);
                    225:                if (sbappendaddr(&last->inp_socket->so_rcv,
                    226:                    sintosa(&ripsrc), m, opts) == 0) {
1.13      mycroft   227:                        m_freem(m);
1.36      thorpej   228:                        if (opts)
                    229:                                m_freem(opts);
                    230:                } else
                    231:                        sorwakeup(last->inp_socket);
1.13      mycroft   232:        } else {
1.44      darrenr   233:                if (inetsw[ip_protox[ip->ip_p]].pr_input == rip_input) {
1.47      itojun    234:                        icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PROTOCOL,
                    235:                            0, 0);
1.44      darrenr   236:                        ipstat.ips_noproto++;
                    237:                        ipstat.ips_delivered--;
                    238:                } else
                    239:                        m_freem(m);
1.1       cgd       240:        }
1.43      itojun    241:        return;
1.60      itojun    242: }
                    243:
                    244: int
                    245: rip_pcbnotify(table, faddr, laddr, proto, errno, notify)
                    246:        struct inpcbtable *table;
                    247:        struct in_addr faddr, laddr;
                    248:        int proto;
                    249:        int errno;
                    250:        void (*notify) __P((struct inpcb *, int));
                    251: {
                    252:        struct inpcb *inp, *ninp;
                    253:        int nmatch;
                    254:
                    255:        nmatch = 0;
1.75      itojun    256:        for (inp = (struct inpcb *)CIRCLEQ_FIRST(&table->inpt_queue);
1.60      itojun    257:            inp != (struct inpcb *)&table->inpt_queue;
                    258:            inp = ninp) {
1.75      itojun    259:                ninp = (struct inpcb *)inp->inp_queue.cqe_next;
                    260:                if (inp->inp_af != AF_INET)
                    261:                        continue;
1.60      itojun    262:                if (inp->inp_ip.ip_p && inp->inp_ip.ip_p != proto)
                    263:                        continue;
                    264:                if (in_hosteq(inp->inp_faddr, faddr) &&
                    265:                    in_hosteq(inp->inp_laddr, laddr)) {
                    266:                        (*notify)(inp, errno);
                    267:                        nmatch++;
                    268:                }
                    269:        }
                    270:
                    271:        return nmatch;
                    272: }
                    273:
                    274: void *
                    275: rip_ctlinput(cmd, sa, v)
                    276:        int cmd;
                    277:        struct sockaddr *sa;
                    278:        void *v;
                    279: {
                    280:        struct ip *ip = v;
                    281:        void (*notify) __P((struct inpcb *, int)) = in_rtchange;
                    282:        int errno;
                    283:
                    284:        if (sa->sa_family != AF_INET ||
                    285:            sa->sa_len != sizeof(struct sockaddr_in))
                    286:                return NULL;
                    287:        if ((unsigned)cmd >= PRC_NCMDS)
                    288:                return NULL;
                    289:        errno = inetctlerrmap[cmd];
                    290:        if (PRC_IS_REDIRECT(cmd))
                    291:                notify = in_rtchange, ip = 0;
                    292:        else if (cmd == PRC_HOSTDEAD)
                    293:                ip = 0;
                    294:        else if (errno == 0)
                    295:                return NULL;
                    296:        if (ip) {
                    297:                rip_pcbnotify(&rawcbtable, satosin(sa)->sin_addr,
                    298:                    ip->ip_src, ip->ip_p, errno, notify);
                    299:
                    300:                /* XXX mapped address case */
                    301:        } else
                    302:                in_pcbnotifyall(&rawcbtable, satosin(sa)->sin_addr, errno,
                    303:                    notify);
                    304:        return NULL;
1.1       cgd       305: }
                    306:
                    307: /*
                    308:  * Generate IP header and pass packet to ip_output.
                    309:  * Tack on options user may have setup with control call.
                    310:  */
1.9       mycroft   311: int
1.24      christos  312: #if __STDC__
                    313: rip_output(struct mbuf *m, ...)
                    314: #else
                    315: rip_output(m, va_alist)
                    316:        struct mbuf *m;
                    317:        va_dcl
                    318: #endif
                    319: {
1.53      augustss  320:        struct inpcb *inp;
                    321:        struct ip *ip;
1.10      mycroft   322:        struct mbuf *opts;
1.24      christos  323:        int flags;
                    324:        va_list ap;
                    325:
                    326:        va_start(ap, m);
1.27      mycroft   327:        inp = va_arg(ap, struct inpcb *);
1.24      christos  328:        va_end(ap);
                    329:
1.27      mycroft   330:        flags =
1.37      matt      331:            (inp->inp_socket->so_options & SO_DONTROUTE) | IP_ALLOWBROADCAST
                    332:            | IP_RETURNMTU;
1.1       cgd       333:
                    334:        /*
                    335:         * If the user handed us a complete IP packet, use it.
                    336:         * Otherwise, allocate an mbuf for a header and fill it in.
                    337:         */
1.13      mycroft   338:        if ((inp->inp_flags & INP_HDRINCL) == 0) {
1.35      thorpej   339:                if ((m->m_pkthdr.len + sizeof(struct ip)) > IP_MAXPACKET) {
                    340:                        m_freem(m);
                    341:                        return (EMSGSIZE);
                    342:                }
1.68      itojun    343:                M_PREPEND(m, sizeof(struct ip), M_DONTWAIT);
                    344:                if (!m)
                    345:                        return (ENOBUFS);
1.1       cgd       346:                ip = mtod(m, struct ip *);
                    347:                ip->ip_tos = 0;
1.62      itojun    348:                ip->ip_off = htons(0);
1.13      mycroft   349:                ip->ip_p = inp->inp_ip.ip_p;
1.62      itojun    350:                ip->ip_len = htons(m->m_pkthdr.len);
1.13      mycroft   351:                ip->ip_src = inp->inp_laddr;
1.27      mycroft   352:                ip->ip_dst = inp->inp_faddr;
1.1       cgd       353:                ip->ip_ttl = MAXTTL;
1.13      mycroft   354:                opts = inp->inp_options;
                    355:        } else {
1.35      thorpej   356:                if (m->m_pkthdr.len > IP_MAXPACKET) {
                    357:                        m_freem(m);
                    358:                        return (EMSGSIZE);
                    359:                }
1.13      mycroft   360:                ip = mtod(m, struct ip *);
1.65      thorpej   361:
                    362:                /*
                    363:                 * If the mbuf is read-only, we need to allocate
                    364:                 * a new mbuf for the header, since we need to
                    365:                 * modify the header.
                    366:                 */
                    367:                if (M_READONLY(m)) {
                    368:                        int hlen = ip->ip_hl << 2;
                    369:
                    370:                        m = m_copyup(m, hlen, (max_linkhdr + 3) & ~3);
                    371:                        if (m == NULL)
                    372:                                return (ENOMEM);        /* XXX */
                    373:                        ip = mtod(m, struct ip *);
                    374:                }
                    375:
1.62      itojun    376:                /* XXX userland passes ip_len and ip_off in host order */
1.38      mycroft   377:                if (m->m_pkthdr.len != ip->ip_len) {
                    378:                        m_freem(m);
                    379:                        return (EINVAL);
                    380:                }
1.62      itojun    381:                HTONS(ip->ip_len);
                    382:                HTONS(ip->ip_off);
1.13      mycroft   383:                if (ip->ip_id == 0)
1.77      jonathan  384:                        ip->ip_id = ip_newid();
1.13      mycroft   385:                opts = NULL;
                    386:                /* XXX prevent ip_output from overwriting header fields */
                    387:                flags |= IP_RAWOUTPUT;
                    388:                ipstat.ips_rawout++;
1.1       cgd       389:        }
1.62      itojun    390:        return (ip_output(m, opts, &inp->inp_route, flags, inp->inp_moptions,
1.73      itojun    391:             inp->inp_socket, &inp->inp_errormtu));
1.1       cgd       392: }
                    393:
                    394: /*
                    395:  * Raw IP socket option processing.
                    396:  */
1.9       mycroft   397: int
1.1       cgd       398: rip_ctloutput(op, so, level, optname, m)
                    399:        int op;
                    400:        struct socket *so;
                    401:        int level, optname;
                    402:        struct mbuf **m;
                    403: {
1.53      augustss  404:        struct inpcb *inp = sotoinpcb(so);
1.31      mycroft   405:        int error = 0;
1.1       cgd       406:
1.15      mycroft   407:        if (level != IPPROTO_IP) {
1.31      mycroft   408:                error = ENOPROTOOPT;
                    409:                if (op == PRCO_SETOPT && *m != 0)
                    410:                        (void) m_free(*m);
                    411:        } else switch (op) {
                    412:
                    413:        case PRCO_SETOPT:
                    414:                switch (optname) {
                    415:                case IP_HDRINCL:
                    416:                        if (*m == 0 || (*m)->m_len < sizeof (int))
                    417:                                error = EINVAL;
                    418:                        else {
1.13      mycroft   419:                                if (*mtod(*m, int *))
                    420:                                        inp->inp_flags |= INP_HDRINCL;
                    421:                                else
                    422:                                        inp->inp_flags &= ~INP_HDRINCL;
                    423:                        }
1.31      mycroft   424:                        if (*m != 0)
                    425:                                (void) m_free(*m);
                    426:                        break;
                    427:
                    428: #ifdef MROUTING
                    429:                case MRT_INIT:
                    430:                case MRT_DONE:
                    431:                case MRT_ADD_VIF:
                    432:                case MRT_DEL_VIF:
                    433:                case MRT_ADD_MFC:
                    434:                case MRT_DEL_MFC:
                    435:                case MRT_ASSERT:
                    436:                        error = ip_mrouter_set(so, optname, m);
                    437:                        break;
                    438: #endif
                    439:
                    440:                default:
                    441:                        error = ip_ctloutput(op, so, level, optname, m);
                    442:                        break;
1.13      mycroft   443:                }
                    444:                break;
1.1       cgd       445:
1.31      mycroft   446:        case PRCO_GETOPT:
                    447:                switch (optname) {
                    448:                case IP_HDRINCL:
1.66      thorpej   449:                        *m = m_get(M_WAIT, MT_SOOPTS);
1.67      matt      450:                        MCLAIM((*m), so->so_mowner);
1.31      mycroft   451:                        (*m)->m_len = sizeof (int);
                    452:                        *mtod(*m, int *) = inp->inp_flags & INP_HDRINCL ? 1 : 0;
                    453:                        break;
                    454:
1.6       hpeyerl   455: #ifdef MROUTING
1.31      mycroft   456:                case MRT_VERSION:
                    457:                case MRT_ASSERT:
                    458:                        error = ip_mrouter_get(so, optname, m);
1.18      mycroft   459:                        break;
1.31      mycroft   460: #endif
                    461:
1.18      mycroft   462:                default:
1.31      mycroft   463:                        error = ip_ctloutput(op, so, level, optname, m);
1.18      mycroft   464:                        break;
                    465:                }
1.31      mycroft   466:                break;
1.1       cgd       467:        }
1.31      mycroft   468:        return (error);
1.1       cgd       469: }
                    470:
1.27      mycroft   471: int
1.29      mycroft   472: rip_bind(inp, nam)
                    473:        struct inpcb *inp;
                    474:        struct mbuf *nam;
                    475: {
                    476:        struct sockaddr_in *addr = mtod(nam, struct sockaddr_in *);
                    477:
                    478:        if (nam->m_len != sizeof(*addr))
                    479:                return (EINVAL);
1.58      matt      480:        if (TAILQ_FIRST(&ifnet) == 0)
1.29      mycroft   481:                return (EADDRNOTAVAIL);
                    482:        if (addr->sin_family != AF_INET &&
                    483:            addr->sin_family != AF_IMPLINK)
                    484:                return (EAFNOSUPPORT);
1.32      mycroft   485:        if (!in_nullhost(addr->sin_addr) &&
1.29      mycroft   486:            ifa_ifwithaddr(sintosa(addr)) == 0)
                    487:                return (EADDRNOTAVAIL);
                    488:        inp->inp_laddr = addr->sin_addr;
                    489:        return (0);
                    490: }
                    491:
                    492: int
1.27      mycroft   493: rip_connect(inp, nam)
                    494:        struct inpcb *inp;
                    495:        struct mbuf *nam;
                    496: {
                    497:        struct sockaddr_in *addr = mtod(nam, struct sockaddr_in *);
                    498:
                    499:        if (nam->m_len != sizeof(*addr))
                    500:                return (EINVAL);
1.58      matt      501:        if (TAILQ_FIRST(&ifnet) == 0)
1.27      mycroft   502:                return (EADDRNOTAVAIL);
                    503:        if (addr->sin_family != AF_INET &&
                    504:            addr->sin_family != AF_IMPLINK)
                    505:                return (EAFNOSUPPORT);
                    506:        inp->inp_faddr = addr->sin_addr;
                    507:        return (0);
                    508: }
                    509:
                    510: void
                    511: rip_disconnect(inp)
                    512:        struct inpcb *inp;
                    513: {
                    514:
1.32      mycroft   515:        inp->inp_faddr = zeroin_addr;
1.27      mycroft   516: }
                    517:
1.13      mycroft   518: u_long rip_sendspace = RIPSNDQ;
                    519: u_long rip_recvspace = RIPRCVQ;
                    520:
1.1       cgd       521: /*ARGSUSED*/
1.9       mycroft   522: int
1.70      fvdl      523: rip_usrreq(so, req, m, nam, control, p)
1.53      augustss  524:        struct socket *so;
1.1       cgd       525:        int req;
1.2       cgd       526:        struct mbuf *m, *nam, *control;
1.70      fvdl      527:        struct proc *p;
1.1       cgd       528: {
1.53      augustss  529:        struct inpcb *inp;
1.27      mycroft   530:        int s;
1.53      augustss  531:        int error = 0;
1.13      mycroft   532: #ifdef MROUTING
1.6       hpeyerl   533:        extern struct socket *ip_mrouter;
                    534: #endif
1.27      mycroft   535:
1.22      pk        536:        if (req == PRU_CONTROL)
                    537:                return (in_control(so, (long)m, (caddr_t)nam,
1.26      mycroft   538:                    (struct ifnet *)control, p));
1.49      thorpej   539:
1.50      thorpej   540:        if (req == PRU_PURGEIF) {
1.56      itojun    541:                in_pcbpurgeif0(&rawcbtable, (struct ifnet *)control);
1.50      thorpej   542:                in_purgeif((struct ifnet *)control);
                    543:                in_pcbpurgeif(&rawcbtable, (struct ifnet *)control);
1.49      thorpej   544:                return (0);
                    545:        }
1.22      pk        546:
1.27      mycroft   547:        s = splsoftnet();
                    548:        inp = sotoinpcb(so);
1.28      mycroft   549: #ifdef DIAGNOSTIC
                    550:        if (req != PRU_SEND && req != PRU_SENDOOB && control)
                    551:                panic("rip_usrreq: unexpected control mbuf");
                    552: #endif
1.27      mycroft   553:        if (inp == 0 && req != PRU_ATTACH) {
1.22      pk        554:                error = EINVAL;
                    555:                goto release;
                    556:        }
                    557:
1.1       cgd       558:        switch (req) {
                    559:
                    560:        case PRU_ATTACH:
1.27      mycroft   561:                if (inp != 0) {
                    562:                        error = EISCONN;
                    563:                        break;
                    564:                }
1.26      mycroft   565:                if (p == 0 || (error = suser(p->p_ucred, &p->p_acflag))) {
1.13      mycroft   566:                        error = EACCES;
                    567:                        break;
                    568:                }
1.27      mycroft   569:                if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
                    570:                        error = soreserve(so, rip_sendspace, rip_recvspace);
                    571:                        if (error)
                    572:                                break;
                    573:                }
                    574:                error = in_pcballoc(so, &rawcbtable);
                    575:                if (error)
1.13      mycroft   576:                        break;
1.27      mycroft   577:                inp = sotoinpcb(so);
1.17      cgd       578:                inp->inp_ip.ip_p = (long)nam;
1.1       cgd       579:                break;
                    580:
                    581:        case PRU_DETACH:
1.13      mycroft   582: #ifdef MROUTING
1.6       hpeyerl   583:                if (so == ip_mrouter)
                    584:                        ip_mrouter_done();
                    585: #endif
1.13      mycroft   586:                in_pcbdetach(inp);
1.1       cgd       587:                break;
                    588:
                    589:        case PRU_BIND:
1.29      mycroft   590:                error = rip_bind(inp, nam);
1.27      mycroft   591:                break;
                    592:
                    593:        case PRU_LISTEN:
                    594:                error = EOPNOTSUPP;
                    595:                break;
                    596:
                    597:        case PRU_CONNECT:
                    598:                error = rip_connect(inp, nam);
                    599:                if (error)
1.13      mycroft   600:                        break;
1.1       cgd       601:                soisconnected(so);
1.13      mycroft   602:                break;
                    603:
                    604:        case PRU_CONNECT2:
                    605:                error = EOPNOTSUPP;
                    606:                break;
                    607:
1.27      mycroft   608:        case PRU_DISCONNECT:
                    609:                soisdisconnected(so);
                    610:                rip_disconnect(inp);
                    611:                break;
                    612:
1.13      mycroft   613:        /*
                    614:         * Mark the connection as being incapable of further input.
                    615:         */
                    616:        case PRU_SHUTDOWN:
                    617:                socantsendmore(so);
                    618:                break;
                    619:
1.27      mycroft   620:        case PRU_RCVD:
                    621:                error = EOPNOTSUPP;
                    622:                break;
                    623:
1.13      mycroft   624:        /*
                    625:         * Ship a packet out.  The appropriate raw output
                    626:         * routine handles any massaging necessary.
                    627:         */
                    628:        case PRU_SEND:
1.28      mycroft   629:                if (control && control->m_len) {
                    630:                        m_freem(control);
                    631:                        m_freem(m);
                    632:                        error = EINVAL;
                    633:                        break;
                    634:                }
                    635:        {
1.27      mycroft   636:                if (nam) {
                    637:                        if ((so->so_state & SS_ISCONNECTED) != 0) {
1.13      mycroft   638:                                error = EISCONN;
1.28      mycroft   639:                                goto die;
1.13      mycroft   640:                        }
1.27      mycroft   641:                        error = rip_connect(inp, nam);
                    642:                        if (error) {
1.28      mycroft   643:                        die:
1.27      mycroft   644:                                m_freem(m);
                    645:                                break;
                    646:                        }
1.13      mycroft   647:                } else {
1.27      mycroft   648:                        if ((so->so_state & SS_ISCONNECTED) == 0) {
1.13      mycroft   649:                                error = ENOTCONN;
1.28      mycroft   650:                                goto die;
1.13      mycroft   651:                        }
                    652:                }
1.27      mycroft   653:                error = rip_output(m, inp);
                    654:                if (nam)
                    655:                        rip_disconnect(inp);
1.28      mycroft   656:        }
1.13      mycroft   657:                break;
                    658:
                    659:        case PRU_SENSE:
                    660:                /*
                    661:                 * stat: don't bother with a blocksize.
                    662:                 */
1.27      mycroft   663:                splx(s);
1.1       cgd       664:                return (0);
1.13      mycroft   665:
                    666:        case PRU_RCVOOB:
1.27      mycroft   667:                error = EOPNOTSUPP;
                    668:                break;
                    669:
1.13      mycroft   670:        case PRU_SENDOOB:
1.28      mycroft   671:                m_freem(control);
1.27      mycroft   672:                m_freem(m);
1.13      mycroft   673:                error = EOPNOTSUPP;
                    674:                break;
                    675:
                    676:        case PRU_SOCKADDR:
                    677:                in_setsockaddr(inp, nam);
                    678:                break;
                    679:
                    680:        case PRU_PEERADDR:
                    681:                in_setpeeraddr(inp, nam);
                    682:                break;
                    683:
                    684:        default:
                    685:                panic("rip_usrreq");
1.1       cgd       686:        }
1.27      mycroft   687:
1.22      pk        688: release:
1.27      mycroft   689:        splx(s);
1.1       cgd       690:        return (error);
                    691: }

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