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Annotation of src/sys/netinet/raw_ip.c, Revision 1.77

1.77    ! jonathan    1: /*     $NetBSD: raw_ip.c,v 1.76 2003/09/06 03:36:31 itojun 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>
1.77    ! jonathan   64: __KERNEL_RCSID(0, "$NetBSD: raw_ip.c,v 1.76 2003/09/06 03:36:31 itojun Exp $");
1.40      scottr     65:
1.45      thorpej    66: #include "opt_ipsec.h"
1.40      scottr     67: #include "opt_mrouting.h"
1.1       cgd        68:
1.7       mycroft    69: #include <sys/param.h>
                     70: #include <sys/malloc.h>
                     71: #include <sys/mbuf.h>
                     72: #include <sys/socket.h>
                     73: #include <sys/protosw.h>
                     74: #include <sys/socketvar.h>
                     75: #include <sys/errno.h>
1.13      mycroft    76: #include <sys/systm.h>
1.26      mycroft    77: #include <sys/proc.h>
1.1       cgd        78:
1.7       mycroft    79: #include <net/if.h>
                     80: #include <net/route.h>
1.1       cgd        81:
1.7       mycroft    82: #include <netinet/in.h>
                     83: #include <netinet/in_systm.h>
                     84: #include <netinet/ip.h>
                     85: #include <netinet/ip_var.h>
1.13      mycroft    86: #include <netinet/ip_mroute.h>
1.44      darrenr    87: #include <netinet/ip_icmp.h>
1.7       mycroft    88: #include <netinet/in_pcb.h>
1.24      christos   89: #include <netinet/in_var.h>
                     90:
                     91: #include <machine/stdarg.h>
1.13      mycroft    92:
1.43      itojun     93: #ifdef IPSEC
                     94: #include <netinet6/ipsec.h>
                     95: #endif /*IPSEC*/
                     96:
1.72      jonathan   97: #ifdef FAST_IPSEC
                     98: #include <netipsec/ipsec.h>
                     99: #endif /* FAST_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 *);
1.75      itojun    145:        struct inpcb_hdr *inph;
1.53      augustss  146:        struct inpcb *inp;
1.36      thorpej   147:        struct inpcb *last = 0;
                    148:        struct mbuf *opts = 0;
1.32      mycroft   149:        struct sockaddr_in ripsrc;
1.43      itojun    150:        va_list ap;
                    151:
                    152:        va_start(ap, m);
1.64      simonb    153:        (void)va_arg(ap, int);          /* ignore value, advance ap */
1.43      itojun    154:        proto = va_arg(ap, int);
                    155:        va_end(ap);
1.1       cgd       156:
1.32      mycroft   157:        ripsrc.sin_family = AF_INET;
                    158:        ripsrc.sin_len = sizeof(struct sockaddr_in);
1.1       cgd       159:        ripsrc.sin_addr = ip->ip_src;
1.34      mycroft   160:        ripsrc.sin_port = 0;
                    161:        bzero((caddr_t)ripsrc.sin_zero, sizeof(ripsrc.sin_zero));
1.42      thorpej   162:
                    163:        /*
                    164:         * XXX Compatibility: programs using raw IP expect ip_len
1.62      itojun    165:         * XXX to have the header length subtracted, and in host order.
                    166:         * XXX ip_off is also expected to be host order.
1.42      thorpej   167:         */
1.62      itojun    168:        ip->ip_len = ntohs(ip->ip_len) - (ip->ip_hl << 2);
                    169:        NTOHS(ip->ip_off);
1.32      mycroft   170:
1.75      itojun    171:        CIRCLEQ_FOREACH(inph, &rawcbtable.inpt_queue, inph_queue) {
                    172:                inp = (struct inpcb *)inph;
                    173:                if (inp->inp_af != AF_INET)
                    174:                        continue;
1.43      itojun    175:                if (inp->inp_ip.ip_p && inp->inp_ip.ip_p != proto)
1.13      mycroft   176:                        continue;
1.32      mycroft   177:                if (!in_nullhost(inp->inp_laddr) &&
                    178:                    !in_hosteq(inp->inp_laddr, ip->ip_dst))
1.13      mycroft   179:                        continue;
1.32      mycroft   180:                if (!in_nullhost(inp->inp_faddr) &&
                    181:                    !in_hosteq(inp->inp_faddr, ip->ip_src))
1.13      mycroft   182:                        continue;
                    183:                if (last) {
                    184:                        struct mbuf *n;
1.55      itojun    185:
1.72      jonathan  186: #if defined(IPSEC) || defined(FAST_IPSEC)
1.55      itojun    187:                        /* check AH/ESP integrity. */
                    188:                        if (ipsec4_in_reject_so(m, last->inp_socket)) {
                    189:                                ipsecstat.in_polvio++;
                    190:                                /* do not inject data to pcb */
                    191:                        } else
                    192: #endif /*IPSEC*/
1.24      christos  193:                        if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) {
1.36      thorpej   194:                                if (last->inp_flags & INP_CONTROLOPTS ||
                    195:                                    last->inp_socket->so_options & SO_TIMESTAMP)
                    196:                                        ip_savecontrol(last, &opts, ip, n);
                    197:                                if (sbappendaddr(&last->inp_socket->so_rcv,
                    198:                                    sintosa(&ripsrc), n, opts) == 0) {
1.13      mycroft   199:                                        /* should notify about lost packet */
                    200:                                        m_freem(n);
1.36      thorpej   201:                                        if (opts)
                    202:                                                m_freem(opts);
                    203:                                } else
                    204:                                        sorwakeup(last->inp_socket);
1.41      thorpej   205:                                opts = NULL;
1.13      mycroft   206:                        }
                    207:                }
1.36      thorpej   208:                last = inp;
1.13      mycroft   209:        }
1.72      jonathan  210: #if defined(IPSEC) || defined(FAST_IPSEC)
1.55      itojun    211:        /* check AH/ESP integrity. */
                    212:        if (last && ipsec4_in_reject_so(m, last->inp_socket)) {
                    213:                m_freem(m);
                    214:                ipsecstat.in_polvio++;
                    215:                ipstat.ips_delivered--;
                    216:                /* do not inject data to pcb */
                    217:        } else
                    218: #endif /*IPSEC*/
1.13      mycroft   219:        if (last) {
1.36      thorpej   220:                if (last->inp_flags & INP_CONTROLOPTS ||
                    221:                    last->inp_socket->so_options & SO_TIMESTAMP)
                    222:                        ip_savecontrol(last, &opts, ip, m);
                    223:                if (sbappendaddr(&last->inp_socket->so_rcv,
                    224:                    sintosa(&ripsrc), m, opts) == 0) {
1.13      mycroft   225:                        m_freem(m);
1.36      thorpej   226:                        if (opts)
                    227:                                m_freem(opts);
                    228:                } else
                    229:                        sorwakeup(last->inp_socket);
1.13      mycroft   230:        } else {
1.44      darrenr   231:                if (inetsw[ip_protox[ip->ip_p]].pr_input == rip_input) {
1.47      itojun    232:                        icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PROTOCOL,
                    233:                            0, 0);
1.44      darrenr   234:                        ipstat.ips_noproto++;
                    235:                        ipstat.ips_delivered--;
                    236:                } else
                    237:                        m_freem(m);
1.1       cgd       238:        }
1.43      itojun    239:        return;
1.60      itojun    240: }
                    241:
                    242: int
                    243: rip_pcbnotify(table, faddr, laddr, proto, errno, notify)
                    244:        struct inpcbtable *table;
                    245:        struct in_addr faddr, laddr;
                    246:        int proto;
                    247:        int errno;
                    248:        void (*notify) __P((struct inpcb *, int));
                    249: {
                    250:        struct inpcb *inp, *ninp;
                    251:        int nmatch;
                    252:
                    253:        nmatch = 0;
1.75      itojun    254:        for (inp = (struct inpcb *)CIRCLEQ_FIRST(&table->inpt_queue);
1.60      itojun    255:            inp != (struct inpcb *)&table->inpt_queue;
                    256:            inp = ninp) {
1.75      itojun    257:                ninp = (struct inpcb *)inp->inp_queue.cqe_next;
                    258:                if (inp->inp_af != AF_INET)
                    259:                        continue;
1.60      itojun    260:                if (inp->inp_ip.ip_p && inp->inp_ip.ip_p != proto)
                    261:                        continue;
                    262:                if (in_hosteq(inp->inp_faddr, faddr) &&
                    263:                    in_hosteq(inp->inp_laddr, laddr)) {
                    264:                        (*notify)(inp, errno);
                    265:                        nmatch++;
                    266:                }
                    267:        }
                    268:
                    269:        return nmatch;
                    270: }
                    271:
                    272: void *
                    273: rip_ctlinput(cmd, sa, v)
                    274:        int cmd;
                    275:        struct sockaddr *sa;
                    276:        void *v;
                    277: {
                    278:        struct ip *ip = v;
                    279:        void (*notify) __P((struct inpcb *, int)) = in_rtchange;
                    280:        int errno;
                    281:
                    282:        if (sa->sa_family != AF_INET ||
                    283:            sa->sa_len != sizeof(struct sockaddr_in))
                    284:                return NULL;
                    285:        if ((unsigned)cmd >= PRC_NCMDS)
                    286:                return NULL;
                    287:        errno = inetctlerrmap[cmd];
                    288:        if (PRC_IS_REDIRECT(cmd))
                    289:                notify = in_rtchange, ip = 0;
                    290:        else if (cmd == PRC_HOSTDEAD)
                    291:                ip = 0;
                    292:        else if (errno == 0)
                    293:                return NULL;
                    294:        if (ip) {
                    295:                rip_pcbnotify(&rawcbtable, satosin(sa)->sin_addr,
                    296:                    ip->ip_src, ip->ip_p, errno, notify);
                    297:
                    298:                /* XXX mapped address case */
                    299:        } else
                    300:                in_pcbnotifyall(&rawcbtable, satosin(sa)->sin_addr, errno,
                    301:                    notify);
                    302:        return NULL;
1.1       cgd       303: }
                    304:
                    305: /*
                    306:  * Generate IP header and pass packet to ip_output.
                    307:  * Tack on options user may have setup with control call.
                    308:  */
1.9       mycroft   309: int
1.24      christos  310: #if __STDC__
                    311: rip_output(struct mbuf *m, ...)
                    312: #else
                    313: rip_output(m, va_alist)
                    314:        struct mbuf *m;
                    315:        va_dcl
                    316: #endif
                    317: {
1.53      augustss  318:        struct inpcb *inp;
                    319:        struct ip *ip;
1.10      mycroft   320:        struct mbuf *opts;
1.24      christos  321:        int flags;
                    322:        va_list ap;
                    323:
                    324:        va_start(ap, m);
1.27      mycroft   325:        inp = va_arg(ap, struct inpcb *);
1.24      christos  326:        va_end(ap);
                    327:
1.27      mycroft   328:        flags =
1.37      matt      329:            (inp->inp_socket->so_options & SO_DONTROUTE) | IP_ALLOWBROADCAST
                    330:            | IP_RETURNMTU;
1.1       cgd       331:
                    332:        /*
                    333:         * If the user handed us a complete IP packet, use it.
                    334:         * Otherwise, allocate an mbuf for a header and fill it in.
                    335:         */
1.13      mycroft   336:        if ((inp->inp_flags & INP_HDRINCL) == 0) {
1.35      thorpej   337:                if ((m->m_pkthdr.len + sizeof(struct ip)) > IP_MAXPACKET) {
                    338:                        m_freem(m);
                    339:                        return (EMSGSIZE);
                    340:                }
1.68      itojun    341:                M_PREPEND(m, sizeof(struct ip), M_DONTWAIT);
                    342:                if (!m)
                    343:                        return (ENOBUFS);
1.1       cgd       344:                ip = mtod(m, struct ip *);
                    345:                ip->ip_tos = 0;
1.62      itojun    346:                ip->ip_off = htons(0);
1.13      mycroft   347:                ip->ip_p = inp->inp_ip.ip_p;
1.62      itojun    348:                ip->ip_len = htons(m->m_pkthdr.len);
1.13      mycroft   349:                ip->ip_src = inp->inp_laddr;
1.27      mycroft   350:                ip->ip_dst = inp->inp_faddr;
1.1       cgd       351:                ip->ip_ttl = MAXTTL;
1.13      mycroft   352:                opts = inp->inp_options;
                    353:        } else {
1.35      thorpej   354:                if (m->m_pkthdr.len > IP_MAXPACKET) {
                    355:                        m_freem(m);
                    356:                        return (EMSGSIZE);
                    357:                }
1.13      mycroft   358:                ip = mtod(m, struct ip *);
1.65      thorpej   359:
                    360:                /*
                    361:                 * If the mbuf is read-only, we need to allocate
                    362:                 * a new mbuf for the header, since we need to
                    363:                 * modify the header.
                    364:                 */
                    365:                if (M_READONLY(m)) {
                    366:                        int hlen = ip->ip_hl << 2;
                    367:
                    368:                        m = m_copyup(m, hlen, (max_linkhdr + 3) & ~3);
                    369:                        if (m == NULL)
                    370:                                return (ENOMEM);        /* XXX */
                    371:                        ip = mtod(m, struct ip *);
                    372:                }
                    373:
1.62      itojun    374:                /* XXX userland passes ip_len and ip_off in host order */
1.38      mycroft   375:                if (m->m_pkthdr.len != ip->ip_len) {
                    376:                        m_freem(m);
                    377:                        return (EINVAL);
                    378:                }
1.62      itojun    379:                HTONS(ip->ip_len);
                    380:                HTONS(ip->ip_off);
1.13      mycroft   381:                if (ip->ip_id == 0)
1.77    ! jonathan  382:                        ip->ip_id = ip_newid();
1.13      mycroft   383:                opts = NULL;
                    384:                /* XXX prevent ip_output from overwriting header fields */
                    385:                flags |= IP_RAWOUTPUT;
                    386:                ipstat.ips_rawout++;
1.1       cgd       387:        }
1.62      itojun    388:        return (ip_output(m, opts, &inp->inp_route, flags, inp->inp_moptions,
1.73      itojun    389:             inp->inp_socket, &inp->inp_errormtu));
1.1       cgd       390: }
                    391:
                    392: /*
                    393:  * Raw IP socket option processing.
                    394:  */
1.9       mycroft   395: int
1.1       cgd       396: rip_ctloutput(op, so, level, optname, m)
                    397:        int op;
                    398:        struct socket *so;
                    399:        int level, optname;
                    400:        struct mbuf **m;
                    401: {
1.53      augustss  402:        struct inpcb *inp = sotoinpcb(so);
1.31      mycroft   403:        int error = 0;
1.1       cgd       404:
1.15      mycroft   405:        if (level != IPPROTO_IP) {
1.31      mycroft   406:                error = ENOPROTOOPT;
                    407:                if (op == PRCO_SETOPT && *m != 0)
                    408:                        (void) m_free(*m);
                    409:        } else switch (op) {
                    410:
                    411:        case PRCO_SETOPT:
                    412:                switch (optname) {
                    413:                case IP_HDRINCL:
                    414:                        if (*m == 0 || (*m)->m_len < sizeof (int))
                    415:                                error = EINVAL;
                    416:                        else {
1.13      mycroft   417:                                if (*mtod(*m, int *))
                    418:                                        inp->inp_flags |= INP_HDRINCL;
                    419:                                else
                    420:                                        inp->inp_flags &= ~INP_HDRINCL;
                    421:                        }
1.31      mycroft   422:                        if (*m != 0)
                    423:                                (void) m_free(*m);
                    424:                        break;
                    425:
                    426: #ifdef MROUTING
                    427:                case MRT_INIT:
                    428:                case MRT_DONE:
                    429:                case MRT_ADD_VIF:
                    430:                case MRT_DEL_VIF:
                    431:                case MRT_ADD_MFC:
                    432:                case MRT_DEL_MFC:
                    433:                case MRT_ASSERT:
                    434:                        error = ip_mrouter_set(so, optname, m);
                    435:                        break;
                    436: #endif
                    437:
                    438:                default:
                    439:                        error = ip_ctloutput(op, so, level, optname, m);
                    440:                        break;
1.13      mycroft   441:                }
                    442:                break;
1.1       cgd       443:
1.31      mycroft   444:        case PRCO_GETOPT:
                    445:                switch (optname) {
                    446:                case IP_HDRINCL:
1.66      thorpej   447:                        *m = m_get(M_WAIT, MT_SOOPTS);
1.67      matt      448:                        MCLAIM((*m), so->so_mowner);
1.31      mycroft   449:                        (*m)->m_len = sizeof (int);
                    450:                        *mtod(*m, int *) = inp->inp_flags & INP_HDRINCL ? 1 : 0;
                    451:                        break;
                    452:
1.6       hpeyerl   453: #ifdef MROUTING
1.31      mycroft   454:                case MRT_VERSION:
                    455:                case MRT_ASSERT:
                    456:                        error = ip_mrouter_get(so, optname, m);
1.18      mycroft   457:                        break;
1.31      mycroft   458: #endif
                    459:
1.18      mycroft   460:                default:
1.31      mycroft   461:                        error = ip_ctloutput(op, so, level, optname, m);
1.18      mycroft   462:                        break;
                    463:                }
1.31      mycroft   464:                break;
1.1       cgd       465:        }
1.31      mycroft   466:        return (error);
1.1       cgd       467: }
                    468:
1.27      mycroft   469: int
1.29      mycroft   470: rip_bind(inp, nam)
                    471:        struct inpcb *inp;
                    472:        struct mbuf *nam;
                    473: {
                    474:        struct sockaddr_in *addr = mtod(nam, struct sockaddr_in *);
                    475:
                    476:        if (nam->m_len != sizeof(*addr))
                    477:                return (EINVAL);
1.58      matt      478:        if (TAILQ_FIRST(&ifnet) == 0)
1.29      mycroft   479:                return (EADDRNOTAVAIL);
                    480:        if (addr->sin_family != AF_INET &&
                    481:            addr->sin_family != AF_IMPLINK)
                    482:                return (EAFNOSUPPORT);
1.32      mycroft   483:        if (!in_nullhost(addr->sin_addr) &&
1.29      mycroft   484:            ifa_ifwithaddr(sintosa(addr)) == 0)
                    485:                return (EADDRNOTAVAIL);
                    486:        inp->inp_laddr = addr->sin_addr;
                    487:        return (0);
                    488: }
                    489:
                    490: int
1.27      mycroft   491: rip_connect(inp, nam)
                    492:        struct inpcb *inp;
                    493:        struct mbuf *nam;
                    494: {
                    495:        struct sockaddr_in *addr = mtod(nam, struct sockaddr_in *);
                    496:
                    497:        if (nam->m_len != sizeof(*addr))
                    498:                return (EINVAL);
1.58      matt      499:        if (TAILQ_FIRST(&ifnet) == 0)
1.27      mycroft   500:                return (EADDRNOTAVAIL);
                    501:        if (addr->sin_family != AF_INET &&
                    502:            addr->sin_family != AF_IMPLINK)
                    503:                return (EAFNOSUPPORT);
                    504:        inp->inp_faddr = addr->sin_addr;
                    505:        return (0);
                    506: }
                    507:
                    508: void
                    509: rip_disconnect(inp)
                    510:        struct inpcb *inp;
                    511: {
                    512:
1.32      mycroft   513:        inp->inp_faddr = zeroin_addr;
1.27      mycroft   514: }
                    515:
1.13      mycroft   516: u_long rip_sendspace = RIPSNDQ;
                    517: u_long rip_recvspace = RIPRCVQ;
                    518:
1.1       cgd       519: /*ARGSUSED*/
1.9       mycroft   520: int
1.70      fvdl      521: rip_usrreq(so, req, m, nam, control, p)
1.53      augustss  522:        struct socket *so;
1.1       cgd       523:        int req;
1.2       cgd       524:        struct mbuf *m, *nam, *control;
1.70      fvdl      525:        struct proc *p;
1.1       cgd       526: {
1.53      augustss  527:        struct inpcb *inp;
1.27      mycroft   528:        int s;
1.53      augustss  529:        int error = 0;
1.13      mycroft   530: #ifdef MROUTING
1.6       hpeyerl   531:        extern struct socket *ip_mrouter;
                    532: #endif
1.27      mycroft   533:
1.22      pk        534:        if (req == PRU_CONTROL)
                    535:                return (in_control(so, (long)m, (caddr_t)nam,
1.26      mycroft   536:                    (struct ifnet *)control, p));
1.49      thorpej   537:
1.50      thorpej   538:        if (req == PRU_PURGEIF) {
1.56      itojun    539:                in_pcbpurgeif0(&rawcbtable, (struct ifnet *)control);
1.50      thorpej   540:                in_purgeif((struct ifnet *)control);
                    541:                in_pcbpurgeif(&rawcbtable, (struct ifnet *)control);
1.49      thorpej   542:                return (0);
                    543:        }
1.22      pk        544:
1.27      mycroft   545:        s = splsoftnet();
                    546:        inp = sotoinpcb(so);
1.28      mycroft   547: #ifdef DIAGNOSTIC
                    548:        if (req != PRU_SEND && req != PRU_SENDOOB && control)
                    549:                panic("rip_usrreq: unexpected control mbuf");
                    550: #endif
1.27      mycroft   551:        if (inp == 0 && req != PRU_ATTACH) {
1.22      pk        552:                error = EINVAL;
                    553:                goto release;
                    554:        }
                    555:
1.1       cgd       556:        switch (req) {
                    557:
                    558:        case PRU_ATTACH:
1.27      mycroft   559:                if (inp != 0) {
                    560:                        error = EISCONN;
                    561:                        break;
                    562:                }
1.26      mycroft   563:                if (p == 0 || (error = suser(p->p_ucred, &p->p_acflag))) {
1.13      mycroft   564:                        error = EACCES;
                    565:                        break;
                    566:                }
1.27      mycroft   567:                if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
                    568:                        error = soreserve(so, rip_sendspace, rip_recvspace);
                    569:                        if (error)
                    570:                                break;
                    571:                }
                    572:                error = in_pcballoc(so, &rawcbtable);
                    573:                if (error)
1.13      mycroft   574:                        break;
1.27      mycroft   575:                inp = sotoinpcb(so);
1.17      cgd       576:                inp->inp_ip.ip_p = (long)nam;
1.1       cgd       577:                break;
                    578:
                    579:        case PRU_DETACH:
1.13      mycroft   580: #ifdef MROUTING
1.6       hpeyerl   581:                if (so == ip_mrouter)
                    582:                        ip_mrouter_done();
                    583: #endif
1.13      mycroft   584:                in_pcbdetach(inp);
1.1       cgd       585:                break;
                    586:
                    587:        case PRU_BIND:
1.29      mycroft   588:                error = rip_bind(inp, nam);
1.27      mycroft   589:                break;
                    590:
                    591:        case PRU_LISTEN:
                    592:                error = EOPNOTSUPP;
                    593:                break;
                    594:
                    595:        case PRU_CONNECT:
                    596:                error = rip_connect(inp, nam);
                    597:                if (error)
1.13      mycroft   598:                        break;
1.1       cgd       599:                soisconnected(so);
1.13      mycroft   600:                break;
                    601:
                    602:        case PRU_CONNECT2:
                    603:                error = EOPNOTSUPP;
                    604:                break;
                    605:
1.27      mycroft   606:        case PRU_DISCONNECT:
                    607:                soisdisconnected(so);
                    608:                rip_disconnect(inp);
                    609:                break;
                    610:
1.13      mycroft   611:        /*
                    612:         * Mark the connection as being incapable of further input.
                    613:         */
                    614:        case PRU_SHUTDOWN:
                    615:                socantsendmore(so);
                    616:                break;
                    617:
1.27      mycroft   618:        case PRU_RCVD:
                    619:                error = EOPNOTSUPP;
                    620:                break;
                    621:
1.13      mycroft   622:        /*
                    623:         * Ship a packet out.  The appropriate raw output
                    624:         * routine handles any massaging necessary.
                    625:         */
                    626:        case PRU_SEND:
1.28      mycroft   627:                if (control && control->m_len) {
                    628:                        m_freem(control);
                    629:                        m_freem(m);
                    630:                        error = EINVAL;
                    631:                        break;
                    632:                }
                    633:        {
1.27      mycroft   634:                if (nam) {
                    635:                        if ((so->so_state & SS_ISCONNECTED) != 0) {
1.13      mycroft   636:                                error = EISCONN;
1.28      mycroft   637:                                goto die;
1.13      mycroft   638:                        }
1.27      mycroft   639:                        error = rip_connect(inp, nam);
                    640:                        if (error) {
1.28      mycroft   641:                        die:
1.27      mycroft   642:                                m_freem(m);
                    643:                                break;
                    644:                        }
1.13      mycroft   645:                } else {
1.27      mycroft   646:                        if ((so->so_state & SS_ISCONNECTED) == 0) {
1.13      mycroft   647:                                error = ENOTCONN;
1.28      mycroft   648:                                goto die;
1.13      mycroft   649:                        }
                    650:                }
1.27      mycroft   651:                error = rip_output(m, inp);
                    652:                if (nam)
                    653:                        rip_disconnect(inp);
1.28      mycroft   654:        }
1.13      mycroft   655:                break;
                    656:
                    657:        case PRU_SENSE:
                    658:                /*
                    659:                 * stat: don't bother with a blocksize.
                    660:                 */
1.27      mycroft   661:                splx(s);
1.1       cgd       662:                return (0);
1.13      mycroft   663:
                    664:        case PRU_RCVOOB:
1.27      mycroft   665:                error = EOPNOTSUPP;
                    666:                break;
                    667:
1.13      mycroft   668:        case PRU_SENDOOB:
1.28      mycroft   669:                m_freem(control);
1.27      mycroft   670:                m_freem(m);
1.13      mycroft   671:                error = EOPNOTSUPP;
                    672:                break;
                    673:
                    674:        case PRU_SOCKADDR:
                    675:                in_setsockaddr(inp, nam);
                    676:                break;
                    677:
                    678:        case PRU_PEERADDR:
                    679:                in_setpeeraddr(inp, nam);
                    680:                break;
                    681:
                    682:        default:
                    683:                panic("rip_usrreq");
1.1       cgd       684:        }
1.27      mycroft   685:
1.22      pk        686: release:
1.27      mycroft   687:        splx(s);
1.1       cgd       688:        return (error);
                    689: }

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