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Annotation of src/sys/netinet/raw_ip.c, Revision 1.44

1.44    ! darrenr     1: /*     $NetBSD: raw_ip.c,v 1.43 1999/07/01 08:12:51 itojun Exp $       */
1.43      itojun      2:
                      3: /*
                      4:  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
                      5:  * All rights reserved.
                      6:  *
                      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.
                     18:  *
                     19:  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
                     20:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     21:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     22:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
                     23:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     24:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     25:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     26:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     27:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     28:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     29:  * SUCH DAMAGE.
                     30:  */
1.14      cgd        31:
1.1       cgd        32: /*
1.13      mycroft    33:  * Copyright (c) 1982, 1986, 1988, 1993
                     34:  *     The Regents of the University of California.  All rights reserved.
1.1       cgd        35:  *
                     36:  * Redistribution and use in source and binary forms, with or without
                     37:  * modification, are permitted provided that the following conditions
                     38:  * are met:
                     39:  * 1. Redistributions of source code must retain the above copyright
                     40:  *    notice, this list of conditions and the following disclaimer.
                     41:  * 2. Redistributions in binary form must reproduce the above copyright
                     42:  *    notice, this list of conditions and the following disclaimer in the
                     43:  *    documentation and/or other materials provided with the distribution.
                     44:  * 3. All advertising materials mentioning features or use of this software
                     45:  *    must display the following acknowledgement:
                     46:  *     This product includes software developed by the University of
                     47:  *     California, Berkeley and its contributors.
                     48:  * 4. Neither the name of the University nor the names of its contributors
                     49:  *    may be used to endorse or promote products derived from this software
                     50:  *    without specific prior written permission.
                     51:  *
                     52:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     53:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     54:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     55:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     56:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     57:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     58:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     59:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     60:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     61:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     62:  * SUCH DAMAGE.
                     63:  *
1.39      thorpej    64:  *     @(#)raw_ip.c    8.7 (Berkeley) 5/15/95
1.1       cgd        65:  */
1.40      scottr     66:
                     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:
1.44    ! darrenr    97: extern u_char ip_protox[];
        !            98: extern struct  protosw inetsw[];
1.20      mycroft    99: struct inpcbtable rawcbtable;
1.30      pk        100:
                    101: int     rip_bind __P((struct inpcb *, struct mbuf *));
                    102: int     rip_connect __P((struct inpcb *, struct mbuf *));
                    103: void    rip_disconnect __P((struct inpcb *));
1.13      mycroft   104:
                    105: /*
                    106:  * Nominal space allocated to a raw ip socket.
                    107:  */
                    108: #define        RIPSNDQ         8192
                    109: #define        RIPRCVQ         8192
1.1       cgd       110:
                    111: /*
                    112:  * Raw interface to IP protocol.
                    113:  */
1.13      mycroft   114:
                    115: /*
                    116:  * Initialize raw connection block q.
                    117:  */
                    118: void
                    119: rip_init()
                    120: {
                    121:
1.33      mycroft   122:        in_pcbinit(&rawcbtable, 1, 1);
1.13      mycroft   123: }
                    124:
1.43      itojun    125: static struct  sockaddr_in ripsrc = { sizeof(ripsrc), AF_INET };
                    126:
1.1       cgd       127: /*
                    128:  * Setup generic address and protocol structures
                    129:  * for raw_input routine, then pass them along with
                    130:  * mbuf chain.
                    131:  */
1.9       mycroft   132: void
1.24      christos  133: #if __STDC__
                    134: rip_input(struct mbuf *m, ...)
                    135: #else
                    136: rip_input(m, va_alist)
1.1       cgd       137:        struct mbuf *m;
1.24      christos  138:        va_dcl
                    139: #endif
1.1       cgd       140: {
1.43      itojun    141:        int off, proto;
1.1       cgd       142:        register struct ip *ip = mtod(m, struct ip *);
1.13      mycroft   143:        register struct inpcb *inp;
1.36      thorpej   144:        struct inpcb *last = 0;
                    145:        struct mbuf *opts = 0;
1.32      mycroft   146:        struct sockaddr_in ripsrc;
1.43      itojun    147:        va_list ap;
                    148:
                    149:        va_start(ap, m);
                    150:        off = va_arg(ap, int);
                    151:        proto = va_arg(ap, int);
                    152:        va_end(ap);
1.1       cgd       153:
1.32      mycroft   154:        ripsrc.sin_family = AF_INET;
                    155:        ripsrc.sin_len = sizeof(struct sockaddr_in);
1.1       cgd       156:        ripsrc.sin_addr = ip->ip_src;
1.34      mycroft   157:        ripsrc.sin_port = 0;
                    158:        bzero((caddr_t)ripsrc.sin_zero, sizeof(ripsrc.sin_zero));
1.42      thorpej   159:
                    160:        /*
                    161:         * XXX Compatibility: programs using raw IP expect ip_len
                    162:         * XXX to have the header length subtracted.
                    163:         */
                    164:        ip->ip_len -= ip->ip_hl << 2;
1.32      mycroft   165:
1.21      cgd       166:        for (inp = rawcbtable.inpt_queue.cqh_first;
                    167:            inp != (struct inpcb *)&rawcbtable.inpt_queue;
                    168:            inp = inp->inp_queue.cqe_next) {
1.43      itojun    169:                if (inp->inp_ip.ip_p && inp->inp_ip.ip_p != proto)
1.13      mycroft   170:                        continue;
1.32      mycroft   171:                if (!in_nullhost(inp->inp_laddr) &&
                    172:                    !in_hosteq(inp->inp_laddr, ip->ip_dst))
1.13      mycroft   173:                        continue;
1.32      mycroft   174:                if (!in_nullhost(inp->inp_faddr) &&
                    175:                    !in_hosteq(inp->inp_faddr, ip->ip_src))
1.13      mycroft   176:                        continue;
                    177:                if (last) {
                    178:                        struct mbuf *n;
1.24      christos  179:                        if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) {
1.36      thorpej   180:                                if (last->inp_flags & INP_CONTROLOPTS ||
                    181:                                    last->inp_socket->so_options & SO_TIMESTAMP)
                    182:                                        ip_savecontrol(last, &opts, ip, n);
                    183:                                if (sbappendaddr(&last->inp_socket->so_rcv,
                    184:                                    sintosa(&ripsrc), n, opts) == 0) {
1.13      mycroft   185:                                        /* should notify about lost packet */
                    186:                                        m_freem(n);
1.36      thorpej   187:                                        if (opts)
                    188:                                                m_freem(opts);
                    189:                                } else
                    190:                                        sorwakeup(last->inp_socket);
1.41      thorpej   191:                                opts = NULL;
1.13      mycroft   192:                        }
                    193:                }
1.36      thorpej   194:                last = inp;
1.13      mycroft   195:        }
                    196:        if (last) {
1.36      thorpej   197:                if (last->inp_flags & INP_CONTROLOPTS ||
                    198:                    last->inp_socket->so_options & SO_TIMESTAMP)
                    199:                        ip_savecontrol(last, &opts, ip, m);
                    200:                if (sbappendaddr(&last->inp_socket->so_rcv,
                    201:                    sintosa(&ripsrc), m, opts) == 0) {
1.13      mycroft   202:                        m_freem(m);
1.36      thorpej   203:                        if (opts)
                    204:                                m_freem(opts);
                    205:                } else
                    206:                        sorwakeup(last->inp_socket);
1.13      mycroft   207:        } else {
1.44    ! darrenr   208:                if (inetsw[ip_protox[ip->ip_p]].pr_input == rip_input) {
        !           209:                        icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PROTOCOL,0,0);
        !           210:                        ipstat.ips_noproto++;
        !           211:                        ipstat.ips_delivered--;
        !           212:                } else
        !           213:                        m_freem(m);
1.1       cgd       214:        }
1.43      itojun    215:        return;
1.1       cgd       216: }
                    217:
                    218: /*
                    219:  * Generate IP header and pass packet to ip_output.
                    220:  * Tack on options user may have setup with control call.
                    221:  */
1.9       mycroft   222: int
1.24      christos  223: #if __STDC__
                    224: rip_output(struct mbuf *m, ...)
                    225: #else
                    226: rip_output(m, va_alist)
                    227:        struct mbuf *m;
                    228:        va_dcl
                    229: #endif
                    230: {
1.27      mycroft   231:        register struct inpcb *inp;
1.1       cgd       232:        register struct ip *ip;
1.10      mycroft   233:        struct mbuf *opts;
1.24      christos  234:        int flags;
                    235:        va_list ap;
                    236:
                    237:        va_start(ap, m);
1.27      mycroft   238:        inp = va_arg(ap, struct inpcb *);
1.24      christos  239:        va_end(ap);
                    240:
1.27      mycroft   241:        flags =
1.37      matt      242:            (inp->inp_socket->so_options & SO_DONTROUTE) | IP_ALLOWBROADCAST
                    243:            | IP_RETURNMTU;
1.1       cgd       244:
                    245:        /*
                    246:         * If the user handed us a complete IP packet, use it.
                    247:         * Otherwise, allocate an mbuf for a header and fill it in.
                    248:         */
1.13      mycroft   249:        if ((inp->inp_flags & INP_HDRINCL) == 0) {
1.35      thorpej   250:                if ((m->m_pkthdr.len + sizeof(struct ip)) > IP_MAXPACKET) {
                    251:                        m_freem(m);
                    252:                        return (EMSGSIZE);
                    253:                }
1.1       cgd       254:                M_PREPEND(m, sizeof(struct ip), M_WAIT);
                    255:                ip = mtod(m, struct ip *);
                    256:                ip->ip_tos = 0;
                    257:                ip->ip_off = 0;
1.13      mycroft   258:                ip->ip_p = inp->inp_ip.ip_p;
1.1       cgd       259:                ip->ip_len = m->m_pkthdr.len;
1.13      mycroft   260:                ip->ip_src = inp->inp_laddr;
1.27      mycroft   261:                ip->ip_dst = inp->inp_faddr;
1.1       cgd       262:                ip->ip_ttl = MAXTTL;
1.13      mycroft   263:                opts = inp->inp_options;
                    264:        } else {
1.35      thorpej   265:                if (m->m_pkthdr.len > IP_MAXPACKET) {
                    266:                        m_freem(m);
                    267:                        return (EMSGSIZE);
                    268:                }
1.13      mycroft   269:                ip = mtod(m, struct ip *);
1.38      mycroft   270:                if (m->m_pkthdr.len != ip->ip_len) {
                    271:                        m_freem(m);
                    272:                        return (EINVAL);
                    273:                }
1.13      mycroft   274:                if (ip->ip_id == 0)
                    275:                        ip->ip_id = htons(ip_id++);
                    276:                opts = NULL;
                    277:                /* XXX prevent ip_output from overwriting header fields */
                    278:                flags |= IP_RAWOUTPUT;
                    279:                ipstat.ips_rawout++;
1.1       cgd       280:        }
1.43      itojun    281: #ifdef IPSEC
                    282:        m->m_pkthdr.rcvif = (struct ifnet *)inp->inp_socket;    /*XXX*/
                    283: #endif /*IPSEC*/
1.37      matt      284:        return (ip_output(m, opts, &inp->inp_route, flags, inp->inp_moptions, &inp->inp_errormtu));
1.1       cgd       285: }
                    286:
                    287: /*
                    288:  * Raw IP socket option processing.
                    289:  */
1.9       mycroft   290: int
1.1       cgd       291: rip_ctloutput(op, so, level, optname, m)
                    292:        int op;
                    293:        struct socket *so;
                    294:        int level, optname;
                    295:        struct mbuf **m;
                    296: {
1.13      mycroft   297:        register struct inpcb *inp = sotoinpcb(so);
1.31      mycroft   298:        int error = 0;
1.1       cgd       299:
1.15      mycroft   300:        if (level != IPPROTO_IP) {
1.31      mycroft   301:                error = ENOPROTOOPT;
                    302:                if (op == PRCO_SETOPT && *m != 0)
                    303:                        (void) m_free(*m);
                    304:        } else switch (op) {
                    305:
                    306:        case PRCO_SETOPT:
                    307:                switch (optname) {
                    308:                case IP_HDRINCL:
                    309:                        if (*m == 0 || (*m)->m_len < sizeof (int))
                    310:                                error = EINVAL;
                    311:                        else {
1.13      mycroft   312:                                if (*mtod(*m, int *))
                    313:                                        inp->inp_flags |= INP_HDRINCL;
                    314:                                else
                    315:                                        inp->inp_flags &= ~INP_HDRINCL;
                    316:                        }
1.31      mycroft   317:                        if (*m != 0)
                    318:                                (void) m_free(*m);
                    319:                        break;
                    320:
                    321: #ifdef MROUTING
                    322:                case MRT_INIT:
                    323:                case MRT_DONE:
                    324:                case MRT_ADD_VIF:
                    325:                case MRT_DEL_VIF:
                    326:                case MRT_ADD_MFC:
                    327:                case MRT_DEL_MFC:
                    328:                case MRT_ASSERT:
                    329:                        error = ip_mrouter_set(so, optname, m);
                    330:                        break;
                    331: #endif
                    332:
                    333:                default:
                    334:                        error = ip_ctloutput(op, so, level, optname, m);
                    335:                        break;
1.13      mycroft   336:                }
                    337:                break;
1.1       cgd       338:
1.31      mycroft   339:        case PRCO_GETOPT:
                    340:                switch (optname) {
                    341:                case IP_HDRINCL:
                    342:                        *m = m_get(M_WAIT, M_SOOPTS);
                    343:                        (*m)->m_len = sizeof (int);
                    344:                        *mtod(*m, int *) = inp->inp_flags & INP_HDRINCL ? 1 : 0;
                    345:                        break;
                    346:
1.6       hpeyerl   347: #ifdef MROUTING
1.31      mycroft   348:                case MRT_VERSION:
                    349:                case MRT_ASSERT:
                    350:                        error = ip_mrouter_get(so, optname, m);
1.18      mycroft   351:                        break;
1.31      mycroft   352: #endif
                    353:
1.18      mycroft   354:                default:
1.31      mycroft   355:                        error = ip_ctloutput(op, so, level, optname, m);
1.18      mycroft   356:                        break;
                    357:                }
1.31      mycroft   358:                break;
1.1       cgd       359:        }
1.31      mycroft   360:        return (error);
1.1       cgd       361: }
                    362:
1.27      mycroft   363: int
1.29      mycroft   364: rip_bind(inp, nam)
                    365:        struct inpcb *inp;
                    366:        struct mbuf *nam;
                    367: {
                    368:        struct sockaddr_in *addr = mtod(nam, struct sockaddr_in *);
                    369:
                    370:        if (nam->m_len != sizeof(*addr))
                    371:                return (EINVAL);
                    372:        if (ifnet.tqh_first == 0)
                    373:                return (EADDRNOTAVAIL);
                    374:        if (addr->sin_family != AF_INET &&
                    375:            addr->sin_family != AF_IMPLINK)
                    376:                return (EAFNOSUPPORT);
1.32      mycroft   377:        if (!in_nullhost(addr->sin_addr) &&
1.29      mycroft   378:            ifa_ifwithaddr(sintosa(addr)) == 0)
                    379:                return (EADDRNOTAVAIL);
                    380:        inp->inp_laddr = addr->sin_addr;
                    381:        return (0);
                    382: }
                    383:
                    384: int
1.27      mycroft   385: rip_connect(inp, nam)
                    386:        struct inpcb *inp;
                    387:        struct mbuf *nam;
                    388: {
                    389:        struct sockaddr_in *addr = mtod(nam, struct sockaddr_in *);
                    390:
                    391:        if (nam->m_len != sizeof(*addr))
                    392:                return (EINVAL);
                    393:        if (ifnet.tqh_first == 0)
                    394:                return (EADDRNOTAVAIL);
                    395:        if (addr->sin_family != AF_INET &&
                    396:            addr->sin_family != AF_IMPLINK)
                    397:                return (EAFNOSUPPORT);
                    398:        inp->inp_faddr = addr->sin_addr;
                    399:        return (0);
                    400: }
                    401:
                    402: void
                    403: rip_disconnect(inp)
                    404:        struct inpcb *inp;
                    405: {
                    406:
1.32      mycroft   407:        inp->inp_faddr = zeroin_addr;
1.27      mycroft   408: }
                    409:
1.13      mycroft   410: u_long rip_sendspace = RIPSNDQ;
                    411: u_long rip_recvspace = RIPRCVQ;
                    412:
1.1       cgd       413: /*ARGSUSED*/
1.9       mycroft   414: int
1.26      mycroft   415: rip_usrreq(so, req, m, nam, control, p)
1.1       cgd       416:        register struct socket *so;
                    417:        int req;
1.2       cgd       418:        struct mbuf *m, *nam, *control;
1.26      mycroft   419:        struct proc *p;
1.1       cgd       420: {
1.27      mycroft   421:        register struct inpcb *inp;
                    422:        int s;
1.1       cgd       423:        register int error = 0;
1.13      mycroft   424: #ifdef MROUTING
1.6       hpeyerl   425:        extern struct socket *ip_mrouter;
                    426: #endif
1.27      mycroft   427:
1.22      pk        428:        if (req == PRU_CONTROL)
                    429:                return (in_control(so, (long)m, (caddr_t)nam,
1.26      mycroft   430:                    (struct ifnet *)control, p));
1.22      pk        431:
1.27      mycroft   432:        s = splsoftnet();
                    433:        inp = sotoinpcb(so);
1.28      mycroft   434: #ifdef DIAGNOSTIC
                    435:        if (req != PRU_SEND && req != PRU_SENDOOB && control)
                    436:                panic("rip_usrreq: unexpected control mbuf");
                    437: #endif
1.27      mycroft   438:        if (inp == 0 && req != PRU_ATTACH) {
1.22      pk        439:                error = EINVAL;
                    440:                goto release;
                    441:        }
                    442:
1.1       cgd       443:        switch (req) {
                    444:
                    445:        case PRU_ATTACH:
1.27      mycroft   446:                if (inp != 0) {
                    447:                        error = EISCONN;
                    448:                        break;
                    449:                }
1.26      mycroft   450:                if (p == 0 || (error = suser(p->p_ucred, &p->p_acflag))) {
1.13      mycroft   451:                        error = EACCES;
                    452:                        break;
                    453:                }
1.27      mycroft   454:                if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
                    455:                        error = soreserve(so, rip_sendspace, rip_recvspace);
                    456:                        if (error)
                    457:                                break;
                    458:                }
                    459:                error = in_pcballoc(so, &rawcbtable);
                    460:                if (error)
1.13      mycroft   461:                        break;
1.27      mycroft   462:                inp = sotoinpcb(so);
1.17      cgd       463:                inp->inp_ip.ip_p = (long)nam;
1.43      itojun    464: #ifdef IPSEC
                    465:                error = ipsec_init_policy(&inp->inp_sp);
                    466: #endif /*IPSEC*/
1.1       cgd       467:                break;
                    468:
                    469:        case PRU_DETACH:
1.13      mycroft   470: #ifdef MROUTING
1.6       hpeyerl   471:                if (so == ip_mrouter)
                    472:                        ip_mrouter_done();
                    473: #endif
1.13      mycroft   474:                in_pcbdetach(inp);
1.1       cgd       475:                break;
                    476:
                    477:        case PRU_BIND:
1.29      mycroft   478:                error = rip_bind(inp, nam);
1.27      mycroft   479:                break;
                    480:
                    481:        case PRU_LISTEN:
                    482:                error = EOPNOTSUPP;
                    483:                break;
                    484:
                    485:        case PRU_CONNECT:
                    486:                error = rip_connect(inp, nam);
                    487:                if (error)
1.13      mycroft   488:                        break;
1.1       cgd       489:                soisconnected(so);
1.13      mycroft   490:                break;
                    491:
                    492:        case PRU_CONNECT2:
                    493:                error = EOPNOTSUPP;
                    494:                break;
                    495:
1.27      mycroft   496:        case PRU_DISCONNECT:
                    497:                soisdisconnected(so);
                    498:                rip_disconnect(inp);
                    499:                break;
                    500:
1.13      mycroft   501:        /*
                    502:         * Mark the connection as being incapable of further input.
                    503:         */
                    504:        case PRU_SHUTDOWN:
                    505:                socantsendmore(so);
                    506:                break;
                    507:
1.27      mycroft   508:        case PRU_RCVD:
                    509:                error = EOPNOTSUPP;
                    510:                break;
                    511:
1.13      mycroft   512:        /*
                    513:         * Ship a packet out.  The appropriate raw output
                    514:         * routine handles any massaging necessary.
                    515:         */
                    516:        case PRU_SEND:
1.28      mycroft   517:                if (control && control->m_len) {
                    518:                        m_freem(control);
                    519:                        m_freem(m);
                    520:                        error = EINVAL;
                    521:                        break;
                    522:                }
                    523:        {
1.27      mycroft   524:                if (nam) {
                    525:                        if ((so->so_state & SS_ISCONNECTED) != 0) {
1.13      mycroft   526:                                error = EISCONN;
1.28      mycroft   527:                                goto die;
1.13      mycroft   528:                        }
1.27      mycroft   529:                        error = rip_connect(inp, nam);
                    530:                        if (error) {
1.28      mycroft   531:                        die:
1.27      mycroft   532:                                m_freem(m);
                    533:                                break;
                    534:                        }
1.13      mycroft   535:                } else {
1.27      mycroft   536:                        if ((so->so_state & SS_ISCONNECTED) == 0) {
1.13      mycroft   537:                                error = ENOTCONN;
1.28      mycroft   538:                                goto die;
1.13      mycroft   539:                        }
                    540:                }
1.27      mycroft   541:                error = rip_output(m, inp);
                    542:                if (nam)
                    543:                        rip_disconnect(inp);
1.28      mycroft   544:        }
1.13      mycroft   545:                break;
                    546:
                    547:        case PRU_SENSE:
                    548:                /*
                    549:                 * stat: don't bother with a blocksize.
                    550:                 */
1.27      mycroft   551:                splx(s);
1.1       cgd       552:                return (0);
1.13      mycroft   553:
                    554:        case PRU_RCVOOB:
1.27      mycroft   555:                error = EOPNOTSUPP;
                    556:                break;
                    557:
1.13      mycroft   558:        case PRU_SENDOOB:
1.28      mycroft   559:                m_freem(control);
1.27      mycroft   560:                m_freem(m);
1.13      mycroft   561:                error = EOPNOTSUPP;
                    562:                break;
                    563:
                    564:        case PRU_SOCKADDR:
                    565:                in_setsockaddr(inp, nam);
                    566:                break;
                    567:
                    568:        case PRU_PEERADDR:
                    569:                in_setpeeraddr(inp, nam);
                    570:                break;
                    571:
                    572:        default:
                    573:                panic("rip_usrreq");
1.1       cgd       574:        }
1.27      mycroft   575:
1.22      pk        576: release:
1.27      mycroft   577:        splx(s);
1.1       cgd       578:        return (error);
                    579: }

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