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Annotation of src/sys/netinet/raw_ip.c, Revision 1.80

1.80    ! jonathan    1: /*     $NetBSD: raw_ip.c,v 1.79 2004/04/26 01:31:57 matt 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.
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>
1.80    ! jonathan   64: __KERNEL_RCSID(0, "$NetBSD: raw_ip.c,v 1.79 2004/04/26 01:31:57 matt Exp $");
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>
1.80    ! jonathan  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: rip_input(struct mbuf *m, ...)
1.1       cgd       138: {
1.63      simonb    139:        int proto;
1.53      augustss  140:        struct ip *ip = mtod(m, struct ip *);
1.75      itojun    141:        struct inpcb_hdr *inph;
1.53      augustss  142:        struct inpcb *inp;
1.36      thorpej   143:        struct inpcb *last = 0;
                    144:        struct mbuf *opts = 0;
1.32      mycroft   145:        struct sockaddr_in ripsrc;
1.43      itojun    146:        va_list ap;
                    147:
                    148:        va_start(ap, m);
1.64      simonb    149:        (void)va_arg(ap, int);          /* ignore value, advance ap */
1.43      itojun    150:        proto = va_arg(ap, int);
                    151:        va_end(ap);
1.1       cgd       152:
1.32      mycroft   153:        ripsrc.sin_family = AF_INET;
                    154:        ripsrc.sin_len = sizeof(struct sockaddr_in);
1.1       cgd       155:        ripsrc.sin_addr = ip->ip_src;
1.34      mycroft   156:        ripsrc.sin_port = 0;
                    157:        bzero((caddr_t)ripsrc.sin_zero, sizeof(ripsrc.sin_zero));
1.42      thorpej   158:
                    159:        /*
                    160:         * XXX Compatibility: programs using raw IP expect ip_len
1.62      itojun    161:         * XXX to have the header length subtracted, and in host order.
                    162:         * XXX ip_off is also expected to be host order.
1.42      thorpej   163:         */
1.62      itojun    164:        ip->ip_len = ntohs(ip->ip_len) - (ip->ip_hl << 2);
                    165:        NTOHS(ip->ip_off);
1.32      mycroft   166:
1.75      itojun    167:        CIRCLEQ_FOREACH(inph, &rawcbtable.inpt_queue, inph_queue) {
                    168:                inp = (struct inpcb *)inph;
                    169:                if (inp->inp_af != AF_INET)
                    170:                        continue;
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:
1.72      jonathan  182: #if defined(IPSEC) || defined(FAST_IPSEC)
1.55      itojun    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:        }
1.72      jonathan  206: #if defined(IPSEC) || defined(FAST_IPSEC)
1.55      itojun    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;
1.75      itojun    250:        for (inp = (struct inpcb *)CIRCLEQ_FIRST(&table->inpt_queue);
1.60      itojun    251:            inp != (struct inpcb *)&table->inpt_queue;
                    252:            inp = ninp) {
1.75      itojun    253:                ninp = (struct inpcb *)inp->inp_queue.cqe_next;
                    254:                if (inp->inp_af != AF_INET)
                    255:                        continue;
1.60      itojun    256:                if (inp->inp_ip.ip_p && inp->inp_ip.ip_p != proto)
                    257:                        continue;
                    258:                if (in_hosteq(inp->inp_faddr, faddr) &&
                    259:                    in_hosteq(inp->inp_laddr, laddr)) {
                    260:                        (*notify)(inp, errno);
                    261:                        nmatch++;
                    262:                }
                    263:        }
                    264:
                    265:        return nmatch;
                    266: }
                    267:
                    268: void *
                    269: rip_ctlinput(cmd, sa, v)
                    270:        int cmd;
                    271:        struct sockaddr *sa;
                    272:        void *v;
                    273: {
                    274:        struct ip *ip = v;
                    275:        void (*notify) __P((struct inpcb *, int)) = in_rtchange;
                    276:        int errno;
                    277:
                    278:        if (sa->sa_family != AF_INET ||
                    279:            sa->sa_len != sizeof(struct sockaddr_in))
                    280:                return NULL;
                    281:        if ((unsigned)cmd >= PRC_NCMDS)
                    282:                return NULL;
                    283:        errno = inetctlerrmap[cmd];
                    284:        if (PRC_IS_REDIRECT(cmd))
                    285:                notify = in_rtchange, ip = 0;
                    286:        else if (cmd == PRC_HOSTDEAD)
                    287:                ip = 0;
                    288:        else if (errno == 0)
                    289:                return NULL;
                    290:        if (ip) {
                    291:                rip_pcbnotify(&rawcbtable, satosin(sa)->sin_addr,
                    292:                    ip->ip_src, ip->ip_p, errno, notify);
                    293:
                    294:                /* XXX mapped address case */
                    295:        } else
                    296:                in_pcbnotifyall(&rawcbtable, satosin(sa)->sin_addr, errno,
                    297:                    notify);
                    298:        return NULL;
1.1       cgd       299: }
                    300:
                    301: /*
                    302:  * Generate IP header and pass packet to ip_output.
                    303:  * Tack on options user may have setup with control call.
                    304:  */
1.9       mycroft   305: int
1.24      christos  306: rip_output(struct mbuf *m, ...)
                    307: {
1.53      augustss  308:        struct inpcb *inp;
                    309:        struct ip *ip;
1.10      mycroft   310:        struct mbuf *opts;
1.24      christos  311:        int flags;
                    312:        va_list ap;
                    313:
                    314:        va_start(ap, m);
1.27      mycroft   315:        inp = va_arg(ap, struct inpcb *);
1.24      christos  316:        va_end(ap);
                    317:
1.27      mycroft   318:        flags =
1.37      matt      319:            (inp->inp_socket->so_options & SO_DONTROUTE) | IP_ALLOWBROADCAST
                    320:            | IP_RETURNMTU;
1.1       cgd       321:
                    322:        /*
                    323:         * If the user handed us a complete IP packet, use it.
                    324:         * Otherwise, allocate an mbuf for a header and fill it in.
                    325:         */
1.13      mycroft   326:        if ((inp->inp_flags & INP_HDRINCL) == 0) {
1.35      thorpej   327:                if ((m->m_pkthdr.len + sizeof(struct ip)) > IP_MAXPACKET) {
                    328:                        m_freem(m);
                    329:                        return (EMSGSIZE);
                    330:                }
1.68      itojun    331:                M_PREPEND(m, sizeof(struct ip), M_DONTWAIT);
                    332:                if (!m)
                    333:                        return (ENOBUFS);
1.1       cgd       334:                ip = mtod(m, struct ip *);
                    335:                ip->ip_tos = 0;
1.62      itojun    336:                ip->ip_off = htons(0);
1.13      mycroft   337:                ip->ip_p = inp->inp_ip.ip_p;
1.62      itojun    338:                ip->ip_len = htons(m->m_pkthdr.len);
1.13      mycroft   339:                ip->ip_src = inp->inp_laddr;
1.27      mycroft   340:                ip->ip_dst = inp->inp_faddr;
1.1       cgd       341:                ip->ip_ttl = MAXTTL;
1.13      mycroft   342:                opts = inp->inp_options;
                    343:        } else {
1.35      thorpej   344:                if (m->m_pkthdr.len > IP_MAXPACKET) {
                    345:                        m_freem(m);
                    346:                        return (EMSGSIZE);
                    347:                }
1.13      mycroft   348:                ip = mtod(m, struct ip *);
1.65      thorpej   349:
                    350:                /*
                    351:                 * If the mbuf is read-only, we need to allocate
                    352:                 * a new mbuf for the header, since we need to
                    353:                 * modify the header.
                    354:                 */
                    355:                if (M_READONLY(m)) {
                    356:                        int hlen = ip->ip_hl << 2;
                    357:
                    358:                        m = m_copyup(m, hlen, (max_linkhdr + 3) & ~3);
                    359:                        if (m == NULL)
                    360:                                return (ENOMEM);        /* XXX */
                    361:                        ip = mtod(m, struct ip *);
                    362:                }
                    363:
1.62      itojun    364:                /* XXX userland passes ip_len and ip_off in host order */
1.38      mycroft   365:                if (m->m_pkthdr.len != ip->ip_len) {
                    366:                        m_freem(m);
                    367:                        return (EINVAL);
                    368:                }
1.62      itojun    369:                HTONS(ip->ip_len);
                    370:                HTONS(ip->ip_off);
1.13      mycroft   371:                if (ip->ip_id == 0)
1.77      jonathan  372:                        ip->ip_id = ip_newid();
1.13      mycroft   373:                opts = NULL;
                    374:                /* XXX prevent ip_output from overwriting header fields */
                    375:                flags |= IP_RAWOUTPUT;
                    376:                ipstat.ips_rawout++;
1.1       cgd       377:        }
1.62      itojun    378:        return (ip_output(m, opts, &inp->inp_route, flags, inp->inp_moptions,
1.73      itojun    379:             inp->inp_socket, &inp->inp_errormtu));
1.1       cgd       380: }
                    381:
                    382: /*
                    383:  * Raw IP socket option processing.
                    384:  */
1.9       mycroft   385: int
1.1       cgd       386: rip_ctloutput(op, so, level, optname, m)
                    387:        int op;
                    388:        struct socket *so;
                    389:        int level, optname;
                    390:        struct mbuf **m;
                    391: {
1.53      augustss  392:        struct inpcb *inp = sotoinpcb(so);
1.31      mycroft   393:        int error = 0;
1.1       cgd       394:
1.15      mycroft   395:        if (level != IPPROTO_IP) {
1.31      mycroft   396:                error = ENOPROTOOPT;
                    397:                if (op == PRCO_SETOPT && *m != 0)
                    398:                        (void) m_free(*m);
                    399:        } else switch (op) {
                    400:
                    401:        case PRCO_SETOPT:
                    402:                switch (optname) {
                    403:                case IP_HDRINCL:
                    404:                        if (*m == 0 || (*m)->m_len < sizeof (int))
                    405:                                error = EINVAL;
                    406:                        else {
1.13      mycroft   407:                                if (*mtod(*m, int *))
                    408:                                        inp->inp_flags |= INP_HDRINCL;
                    409:                                else
                    410:                                        inp->inp_flags &= ~INP_HDRINCL;
                    411:                        }
1.31      mycroft   412:                        if (*m != 0)
                    413:                                (void) m_free(*m);
                    414:                        break;
                    415:
                    416: #ifdef MROUTING
                    417:                case MRT_INIT:
                    418:                case MRT_DONE:
                    419:                case MRT_ADD_VIF:
                    420:                case MRT_DEL_VIF:
                    421:                case MRT_ADD_MFC:
                    422:                case MRT_DEL_MFC:
                    423:                case MRT_ASSERT:
                    424:                        error = ip_mrouter_set(so, optname, m);
                    425:                        break;
                    426: #endif
                    427:
                    428:                default:
                    429:                        error = ip_ctloutput(op, so, level, optname, m);
                    430:                        break;
1.13      mycroft   431:                }
                    432:                break;
1.1       cgd       433:
1.31      mycroft   434:        case PRCO_GETOPT:
                    435:                switch (optname) {
                    436:                case IP_HDRINCL:
1.66      thorpej   437:                        *m = m_get(M_WAIT, MT_SOOPTS);
1.67      matt      438:                        MCLAIM((*m), so->so_mowner);
1.31      mycroft   439:                        (*m)->m_len = sizeof (int);
                    440:                        *mtod(*m, int *) = inp->inp_flags & INP_HDRINCL ? 1 : 0;
                    441:                        break;
                    442:
1.6       hpeyerl   443: #ifdef MROUTING
1.31      mycroft   444:                case MRT_VERSION:
                    445:                case MRT_ASSERT:
                    446:                        error = ip_mrouter_get(so, optname, m);
1.18      mycroft   447:                        break;
1.31      mycroft   448: #endif
                    449:
1.18      mycroft   450:                default:
1.31      mycroft   451:                        error = ip_ctloutput(op, so, level, optname, m);
1.18      mycroft   452:                        break;
                    453:                }
1.31      mycroft   454:                break;
1.1       cgd       455:        }
1.31      mycroft   456:        return (error);
1.1       cgd       457: }
                    458:
1.27      mycroft   459: int
1.29      mycroft   460: rip_bind(inp, nam)
                    461:        struct inpcb *inp;
                    462:        struct mbuf *nam;
                    463: {
                    464:        struct sockaddr_in *addr = mtod(nam, struct sockaddr_in *);
                    465:
                    466:        if (nam->m_len != sizeof(*addr))
                    467:                return (EINVAL);
1.58      matt      468:        if (TAILQ_FIRST(&ifnet) == 0)
1.29      mycroft   469:                return (EADDRNOTAVAIL);
                    470:        if (addr->sin_family != AF_INET &&
                    471:            addr->sin_family != AF_IMPLINK)
                    472:                return (EAFNOSUPPORT);
1.32      mycroft   473:        if (!in_nullhost(addr->sin_addr) &&
1.29      mycroft   474:            ifa_ifwithaddr(sintosa(addr)) == 0)
                    475:                return (EADDRNOTAVAIL);
                    476:        inp->inp_laddr = addr->sin_addr;
                    477:        return (0);
                    478: }
                    479:
                    480: int
1.27      mycroft   481: rip_connect(inp, nam)
                    482:        struct inpcb *inp;
                    483:        struct mbuf *nam;
                    484: {
                    485:        struct sockaddr_in *addr = mtod(nam, struct sockaddr_in *);
                    486:
                    487:        if (nam->m_len != sizeof(*addr))
                    488:                return (EINVAL);
1.58      matt      489:        if (TAILQ_FIRST(&ifnet) == 0)
1.27      mycroft   490:                return (EADDRNOTAVAIL);
                    491:        if (addr->sin_family != AF_INET &&
                    492:            addr->sin_family != AF_IMPLINK)
                    493:                return (EAFNOSUPPORT);
                    494:        inp->inp_faddr = addr->sin_addr;
                    495:        return (0);
                    496: }
                    497:
                    498: void
                    499: rip_disconnect(inp)
                    500:        struct inpcb *inp;
                    501: {
                    502:
1.32      mycroft   503:        inp->inp_faddr = zeroin_addr;
1.27      mycroft   504: }
                    505:
1.13      mycroft   506: u_long rip_sendspace = RIPSNDQ;
                    507: u_long rip_recvspace = RIPRCVQ;
                    508:
1.1       cgd       509: /*ARGSUSED*/
1.9       mycroft   510: int
1.70      fvdl      511: rip_usrreq(so, req, m, nam, control, p)
1.53      augustss  512:        struct socket *so;
1.1       cgd       513:        int req;
1.2       cgd       514:        struct mbuf *m, *nam, *control;
1.70      fvdl      515:        struct proc *p;
1.1       cgd       516: {
1.53      augustss  517:        struct inpcb *inp;
1.27      mycroft   518:        int s;
1.53      augustss  519:        int error = 0;
1.13      mycroft   520: #ifdef MROUTING
1.6       hpeyerl   521:        extern struct socket *ip_mrouter;
                    522: #endif
1.27      mycroft   523:
1.22      pk        524:        if (req == PRU_CONTROL)
                    525:                return (in_control(so, (long)m, (caddr_t)nam,
1.26      mycroft   526:                    (struct ifnet *)control, p));
1.49      thorpej   527:
1.50      thorpej   528:        if (req == PRU_PURGEIF) {
1.56      itojun    529:                in_pcbpurgeif0(&rawcbtable, (struct ifnet *)control);
1.50      thorpej   530:                in_purgeif((struct ifnet *)control);
                    531:                in_pcbpurgeif(&rawcbtable, (struct ifnet *)control);
1.49      thorpej   532:                return (0);
                    533:        }
1.22      pk        534:
1.27      mycroft   535:        s = splsoftnet();
                    536:        inp = sotoinpcb(so);
1.28      mycroft   537: #ifdef DIAGNOSTIC
                    538:        if (req != PRU_SEND && req != PRU_SENDOOB && control)
                    539:                panic("rip_usrreq: unexpected control mbuf");
                    540: #endif
1.27      mycroft   541:        if (inp == 0 && req != PRU_ATTACH) {
1.22      pk        542:                error = EINVAL;
                    543:                goto release;
                    544:        }
                    545:
1.1       cgd       546:        switch (req) {
                    547:
                    548:        case PRU_ATTACH:
1.27      mycroft   549:                if (inp != 0) {
                    550:                        error = EISCONN;
                    551:                        break;
                    552:                }
1.26      mycroft   553:                if (p == 0 || (error = suser(p->p_ucred, &p->p_acflag))) {
1.13      mycroft   554:                        error = EACCES;
                    555:                        break;
                    556:                }
1.27      mycroft   557:                if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
                    558:                        error = soreserve(so, rip_sendspace, rip_recvspace);
                    559:                        if (error)
                    560:                                break;
                    561:                }
                    562:                error = in_pcballoc(so, &rawcbtable);
                    563:                if (error)
1.13      mycroft   564:                        break;
1.27      mycroft   565:                inp = sotoinpcb(so);
1.17      cgd       566:                inp->inp_ip.ip_p = (long)nam;
1.1       cgd       567:                break;
                    568:
                    569:        case PRU_DETACH:
1.13      mycroft   570: #ifdef MROUTING
1.6       hpeyerl   571:                if (so == ip_mrouter)
                    572:                        ip_mrouter_done();
                    573: #endif
1.13      mycroft   574:                in_pcbdetach(inp);
1.1       cgd       575:                break;
                    576:
                    577:        case PRU_BIND:
1.29      mycroft   578:                error = rip_bind(inp, nam);
1.27      mycroft   579:                break;
                    580:
                    581:        case PRU_LISTEN:
                    582:                error = EOPNOTSUPP;
                    583:                break;
                    584:
                    585:        case PRU_CONNECT:
                    586:                error = rip_connect(inp, nam);
                    587:                if (error)
1.13      mycroft   588:                        break;
1.1       cgd       589:                soisconnected(so);
1.13      mycroft   590:                break;
                    591:
                    592:        case PRU_CONNECT2:
                    593:                error = EOPNOTSUPP;
                    594:                break;
                    595:
1.27      mycroft   596:        case PRU_DISCONNECT:
                    597:                soisdisconnected(so);
                    598:                rip_disconnect(inp);
                    599:                break;
                    600:
1.13      mycroft   601:        /*
                    602:         * Mark the connection as being incapable of further input.
                    603:         */
                    604:        case PRU_SHUTDOWN:
                    605:                socantsendmore(so);
                    606:                break;
                    607:
1.27      mycroft   608:        case PRU_RCVD:
                    609:                error = EOPNOTSUPP;
                    610:                break;
                    611:
1.13      mycroft   612:        /*
                    613:         * Ship a packet out.  The appropriate raw output
                    614:         * routine handles any massaging necessary.
                    615:         */
                    616:        case PRU_SEND:
1.28      mycroft   617:                if (control && control->m_len) {
                    618:                        m_freem(control);
                    619:                        m_freem(m);
                    620:                        error = EINVAL;
                    621:                        break;
                    622:                }
                    623:        {
1.27      mycroft   624:                if (nam) {
                    625:                        if ((so->so_state & SS_ISCONNECTED) != 0) {
1.13      mycroft   626:                                error = EISCONN;
1.28      mycroft   627:                                goto die;
1.13      mycroft   628:                        }
1.27      mycroft   629:                        error = rip_connect(inp, nam);
                    630:                        if (error) {
1.28      mycroft   631:                        die:
1.27      mycroft   632:                                m_freem(m);
                    633:                                break;
                    634:                        }
1.13      mycroft   635:                } else {
1.27      mycroft   636:                        if ((so->so_state & SS_ISCONNECTED) == 0) {
1.13      mycroft   637:                                error = ENOTCONN;
1.28      mycroft   638:                                goto die;
1.13      mycroft   639:                        }
                    640:                }
1.27      mycroft   641:                error = rip_output(m, inp);
                    642:                if (nam)
                    643:                        rip_disconnect(inp);
1.28      mycroft   644:        }
1.13      mycroft   645:                break;
                    646:
                    647:        case PRU_SENSE:
                    648:                /*
                    649:                 * stat: don't bother with a blocksize.
                    650:                 */
1.27      mycroft   651:                splx(s);
1.1       cgd       652:                return (0);
1.13      mycroft   653:
                    654:        case PRU_RCVOOB:
1.27      mycroft   655:                error = EOPNOTSUPP;
                    656:                break;
                    657:
1.13      mycroft   658:        case PRU_SENDOOB:
1.28      mycroft   659:                m_freem(control);
1.27      mycroft   660:                m_freem(m);
1.13      mycroft   661:                error = EOPNOTSUPP;
                    662:                break;
                    663:
                    664:        case PRU_SOCKADDR:
                    665:                in_setsockaddr(inp, nam);
                    666:                break;
                    667:
                    668:        case PRU_PEERADDR:
                    669:                in_setpeeraddr(inp, nam);
                    670:                break;
                    671:
                    672:        default:
                    673:                panic("rip_usrreq");
1.1       cgd       674:        }
1.27      mycroft   675:
1.22      pk        676: release:
1.27      mycroft   677:        splx(s);
1.1       cgd       678:        return (error);
                    679: }

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