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Annotation of src/sys/netinet/raw_ip.c, Revision 1.43

1.43    ! itojun      1: /*     $NetBSD: raw_ip.c,v 1.42 1999/01/30 21:43:16 thorpej Exp $      */
        !             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>
1.7       mycroft    87: #include <netinet/in_pcb.h>
1.24      christos   88: #include <netinet/in_var.h>
                     89:
                     90: #include <machine/stdarg.h>
1.13      mycroft    91:
1.43    ! itojun     92: #ifdef IPSEC
        !            93: #include <netinet6/ipsec.h>
        !            94: #endif /*IPSEC*/
        !            95:
1.20      mycroft    96: struct inpcbtable rawcbtable;
1.30      pk         97:
                     98: int     rip_bind __P((struct inpcb *, struct mbuf *));
                     99: int     rip_connect __P((struct inpcb *, struct mbuf *));
                    100: void    rip_disconnect __P((struct inpcb *));
1.13      mycroft   101:
                    102: /*
                    103:  * Nominal space allocated to a raw ip socket.
                    104:  */
                    105: #define        RIPSNDQ         8192
                    106: #define        RIPRCVQ         8192
1.1       cgd       107:
                    108: /*
                    109:  * Raw interface to IP protocol.
                    110:  */
1.13      mycroft   111:
                    112: /*
                    113:  * Initialize raw connection block q.
                    114:  */
                    115: void
                    116: rip_init()
                    117: {
                    118:
1.33      mycroft   119:        in_pcbinit(&rawcbtable, 1, 1);
1.13      mycroft   120: }
                    121:
1.43    ! itojun    122: static struct  sockaddr_in ripsrc = { sizeof(ripsrc), AF_INET };
        !           123:
1.1       cgd       124: /*
                    125:  * Setup generic address and protocol structures
                    126:  * for raw_input routine, then pass them along with
                    127:  * mbuf chain.
                    128:  */
1.9       mycroft   129: void
1.24      christos  130: #if __STDC__
                    131: rip_input(struct mbuf *m, ...)
                    132: #else
                    133: rip_input(m, va_alist)
1.1       cgd       134:        struct mbuf *m;
1.24      christos  135:        va_dcl
                    136: #endif
1.1       cgd       137: {
1.43    ! itojun    138:        int off, proto;
1.1       cgd       139:        register struct ip *ip = mtod(m, struct ip *);
1.13      mycroft   140:        register struct inpcb *inp;
1.36      thorpej   141:        struct inpcb *last = 0;
                    142:        struct mbuf *opts = 0;
1.32      mycroft   143:        struct sockaddr_in ripsrc;
1.43    ! itojun    144:        va_list ap;
        !           145:
        !           146:        va_start(ap, m);
        !           147:        off = va_arg(ap, int);
        !           148:        proto = va_arg(ap, int);
        !           149:        va_end(ap);
1.1       cgd       150:
1.32      mycroft   151:        ripsrc.sin_family = AF_INET;
                    152:        ripsrc.sin_len = sizeof(struct sockaddr_in);
1.1       cgd       153:        ripsrc.sin_addr = ip->ip_src;
1.34      mycroft   154:        ripsrc.sin_port = 0;
                    155:        bzero((caddr_t)ripsrc.sin_zero, sizeof(ripsrc.sin_zero));
1.42      thorpej   156:
                    157:        /*
                    158:         * XXX Compatibility: programs using raw IP expect ip_len
                    159:         * XXX to have the header length subtracted.
                    160:         */
                    161:        ip->ip_len -= ip->ip_hl << 2;
1.32      mycroft   162:
1.21      cgd       163:        for (inp = rawcbtable.inpt_queue.cqh_first;
                    164:            inp != (struct inpcb *)&rawcbtable.inpt_queue;
                    165:            inp = inp->inp_queue.cqe_next) {
1.43    ! itojun    166:                if (inp->inp_ip.ip_p && inp->inp_ip.ip_p != proto)
1.13      mycroft   167:                        continue;
1.32      mycroft   168:                if (!in_nullhost(inp->inp_laddr) &&
                    169:                    !in_hosteq(inp->inp_laddr, ip->ip_dst))
1.13      mycroft   170:                        continue;
1.32      mycroft   171:                if (!in_nullhost(inp->inp_faddr) &&
                    172:                    !in_hosteq(inp->inp_faddr, ip->ip_src))
1.13      mycroft   173:                        continue;
                    174:                if (last) {
                    175:                        struct mbuf *n;
1.24      christos  176:                        if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) {
1.36      thorpej   177:                                if (last->inp_flags & INP_CONTROLOPTS ||
                    178:                                    last->inp_socket->so_options & SO_TIMESTAMP)
                    179:                                        ip_savecontrol(last, &opts, ip, n);
                    180:                                if (sbappendaddr(&last->inp_socket->so_rcv,
                    181:                                    sintosa(&ripsrc), n, opts) == 0) {
1.13      mycroft   182:                                        /* should notify about lost packet */
                    183:                                        m_freem(n);
1.36      thorpej   184:                                        if (opts)
                    185:                                                m_freem(opts);
                    186:                                } else
                    187:                                        sorwakeup(last->inp_socket);
1.41      thorpej   188:                                opts = NULL;
1.13      mycroft   189:                        }
                    190:                }
1.36      thorpej   191:                last = inp;
1.13      mycroft   192:        }
                    193:        if (last) {
1.36      thorpej   194:                if (last->inp_flags & INP_CONTROLOPTS ||
                    195:                    last->inp_socket->so_options & SO_TIMESTAMP)
                    196:                        ip_savecontrol(last, &opts, ip, m);
                    197:                if (sbappendaddr(&last->inp_socket->so_rcv,
                    198:                    sintosa(&ripsrc), m, opts) == 0) {
1.13      mycroft   199:                        m_freem(m);
1.36      thorpej   200:                        if (opts)
                    201:                                m_freem(opts);
                    202:                } else
                    203:                        sorwakeup(last->inp_socket);
1.13      mycroft   204:        } else {
                    205:                m_freem(m);
1.1       cgd       206:                ipstat.ips_noproto++;
                    207:                ipstat.ips_delivered--;
                    208:        }
1.43    ! itojun    209:        return;
1.1       cgd       210: }
                    211:
                    212: /*
                    213:  * Generate IP header and pass packet to ip_output.
                    214:  * Tack on options user may have setup with control call.
                    215:  */
1.9       mycroft   216: int
1.24      christos  217: #if __STDC__
                    218: rip_output(struct mbuf *m, ...)
                    219: #else
                    220: rip_output(m, va_alist)
                    221:        struct mbuf *m;
                    222:        va_dcl
                    223: #endif
                    224: {
1.27      mycroft   225:        register struct inpcb *inp;
1.1       cgd       226:        register struct ip *ip;
1.10      mycroft   227:        struct mbuf *opts;
1.24      christos  228:        int flags;
                    229:        va_list ap;
                    230:
                    231:        va_start(ap, m);
1.27      mycroft   232:        inp = va_arg(ap, struct inpcb *);
1.24      christos  233:        va_end(ap);
                    234:
1.27      mycroft   235:        flags =
1.37      matt      236:            (inp->inp_socket->so_options & SO_DONTROUTE) | IP_ALLOWBROADCAST
                    237:            | IP_RETURNMTU;
1.1       cgd       238:
                    239:        /*
                    240:         * If the user handed us a complete IP packet, use it.
                    241:         * Otherwise, allocate an mbuf for a header and fill it in.
                    242:         */
1.13      mycroft   243:        if ((inp->inp_flags & INP_HDRINCL) == 0) {
1.35      thorpej   244:                if ((m->m_pkthdr.len + sizeof(struct ip)) > IP_MAXPACKET) {
                    245:                        m_freem(m);
                    246:                        return (EMSGSIZE);
                    247:                }
1.1       cgd       248:                M_PREPEND(m, sizeof(struct ip), M_WAIT);
                    249:                ip = mtod(m, struct ip *);
                    250:                ip->ip_tos = 0;
                    251:                ip->ip_off = 0;
1.13      mycroft   252:                ip->ip_p = inp->inp_ip.ip_p;
1.1       cgd       253:                ip->ip_len = m->m_pkthdr.len;
1.13      mycroft   254:                ip->ip_src = inp->inp_laddr;
1.27      mycroft   255:                ip->ip_dst = inp->inp_faddr;
1.1       cgd       256:                ip->ip_ttl = MAXTTL;
1.13      mycroft   257:                opts = inp->inp_options;
                    258:        } else {
1.35      thorpej   259:                if (m->m_pkthdr.len > IP_MAXPACKET) {
                    260:                        m_freem(m);
                    261:                        return (EMSGSIZE);
                    262:                }
1.13      mycroft   263:                ip = mtod(m, struct ip *);
1.38      mycroft   264:                if (m->m_pkthdr.len != ip->ip_len) {
                    265:                        m_freem(m);
                    266:                        return (EINVAL);
                    267:                }
1.13      mycroft   268:                if (ip->ip_id == 0)
                    269:                        ip->ip_id = htons(ip_id++);
                    270:                opts = NULL;
                    271:                /* XXX prevent ip_output from overwriting header fields */
                    272:                flags |= IP_RAWOUTPUT;
                    273:                ipstat.ips_rawout++;
1.1       cgd       274:        }
1.43    ! itojun    275: #ifdef IPSEC
        !           276:        m->m_pkthdr.rcvif = (struct ifnet *)inp->inp_socket;    /*XXX*/
        !           277: #endif /*IPSEC*/
1.37      matt      278:        return (ip_output(m, opts, &inp->inp_route, flags, inp->inp_moptions, &inp->inp_errormtu));
1.1       cgd       279: }
                    280:
                    281: /*
                    282:  * Raw IP socket option processing.
                    283:  */
1.9       mycroft   284: int
1.1       cgd       285: rip_ctloutput(op, so, level, optname, m)
                    286:        int op;
                    287:        struct socket *so;
                    288:        int level, optname;
                    289:        struct mbuf **m;
                    290: {
1.13      mycroft   291:        register struct inpcb *inp = sotoinpcb(so);
1.31      mycroft   292:        int error = 0;
1.1       cgd       293:
1.15      mycroft   294:        if (level != IPPROTO_IP) {
1.31      mycroft   295:                error = ENOPROTOOPT;
                    296:                if (op == PRCO_SETOPT && *m != 0)
                    297:                        (void) m_free(*m);
                    298:        } else switch (op) {
                    299:
                    300:        case PRCO_SETOPT:
                    301:                switch (optname) {
                    302:                case IP_HDRINCL:
                    303:                        if (*m == 0 || (*m)->m_len < sizeof (int))
                    304:                                error = EINVAL;
                    305:                        else {
1.13      mycroft   306:                                if (*mtod(*m, int *))
                    307:                                        inp->inp_flags |= INP_HDRINCL;
                    308:                                else
                    309:                                        inp->inp_flags &= ~INP_HDRINCL;
                    310:                        }
1.31      mycroft   311:                        if (*m != 0)
                    312:                                (void) m_free(*m);
                    313:                        break;
                    314:
                    315: #ifdef MROUTING
                    316:                case MRT_INIT:
                    317:                case MRT_DONE:
                    318:                case MRT_ADD_VIF:
                    319:                case MRT_DEL_VIF:
                    320:                case MRT_ADD_MFC:
                    321:                case MRT_DEL_MFC:
                    322:                case MRT_ASSERT:
                    323:                        error = ip_mrouter_set(so, optname, m);
                    324:                        break;
                    325: #endif
                    326:
                    327:                default:
                    328:                        error = ip_ctloutput(op, so, level, optname, m);
                    329:                        break;
1.13      mycroft   330:                }
                    331:                break;
1.1       cgd       332:
1.31      mycroft   333:        case PRCO_GETOPT:
                    334:                switch (optname) {
                    335:                case IP_HDRINCL:
                    336:                        *m = m_get(M_WAIT, M_SOOPTS);
                    337:                        (*m)->m_len = sizeof (int);
                    338:                        *mtod(*m, int *) = inp->inp_flags & INP_HDRINCL ? 1 : 0;
                    339:                        break;
                    340:
1.6       hpeyerl   341: #ifdef MROUTING
1.31      mycroft   342:                case MRT_VERSION:
                    343:                case MRT_ASSERT:
                    344:                        error = ip_mrouter_get(so, optname, m);
1.18      mycroft   345:                        break;
1.31      mycroft   346: #endif
                    347:
1.18      mycroft   348:                default:
1.31      mycroft   349:                        error = ip_ctloutput(op, so, level, optname, m);
1.18      mycroft   350:                        break;
                    351:                }
1.31      mycroft   352:                break;
1.1       cgd       353:        }
1.31      mycroft   354:        return (error);
1.1       cgd       355: }
                    356:
1.27      mycroft   357: int
1.29      mycroft   358: rip_bind(inp, nam)
                    359:        struct inpcb *inp;
                    360:        struct mbuf *nam;
                    361: {
                    362:        struct sockaddr_in *addr = mtod(nam, struct sockaddr_in *);
                    363:
                    364:        if (nam->m_len != sizeof(*addr))
                    365:                return (EINVAL);
                    366:        if (ifnet.tqh_first == 0)
                    367:                return (EADDRNOTAVAIL);
                    368:        if (addr->sin_family != AF_INET &&
                    369:            addr->sin_family != AF_IMPLINK)
                    370:                return (EAFNOSUPPORT);
1.32      mycroft   371:        if (!in_nullhost(addr->sin_addr) &&
1.29      mycroft   372:            ifa_ifwithaddr(sintosa(addr)) == 0)
                    373:                return (EADDRNOTAVAIL);
                    374:        inp->inp_laddr = addr->sin_addr;
                    375:        return (0);
                    376: }
                    377:
                    378: int
1.27      mycroft   379: rip_connect(inp, nam)
                    380:        struct inpcb *inp;
                    381:        struct mbuf *nam;
                    382: {
                    383:        struct sockaddr_in *addr = mtod(nam, struct sockaddr_in *);
                    384:
                    385:        if (nam->m_len != sizeof(*addr))
                    386:                return (EINVAL);
                    387:        if (ifnet.tqh_first == 0)
                    388:                return (EADDRNOTAVAIL);
                    389:        if (addr->sin_family != AF_INET &&
                    390:            addr->sin_family != AF_IMPLINK)
                    391:                return (EAFNOSUPPORT);
                    392:        inp->inp_faddr = addr->sin_addr;
                    393:        return (0);
                    394: }
                    395:
                    396: void
                    397: rip_disconnect(inp)
                    398:        struct inpcb *inp;
                    399: {
                    400:
1.32      mycroft   401:        inp->inp_faddr = zeroin_addr;
1.27      mycroft   402: }
                    403:
1.13      mycroft   404: u_long rip_sendspace = RIPSNDQ;
                    405: u_long rip_recvspace = RIPRCVQ;
                    406:
1.1       cgd       407: /*ARGSUSED*/
1.9       mycroft   408: int
1.26      mycroft   409: rip_usrreq(so, req, m, nam, control, p)
1.1       cgd       410:        register struct socket *so;
                    411:        int req;
1.2       cgd       412:        struct mbuf *m, *nam, *control;
1.26      mycroft   413:        struct proc *p;
1.1       cgd       414: {
1.27      mycroft   415:        register struct inpcb *inp;
                    416:        int s;
1.1       cgd       417:        register int error = 0;
1.13      mycroft   418: #ifdef MROUTING
1.6       hpeyerl   419:        extern struct socket *ip_mrouter;
                    420: #endif
1.27      mycroft   421:
1.22      pk        422:        if (req == PRU_CONTROL)
                    423:                return (in_control(so, (long)m, (caddr_t)nam,
1.26      mycroft   424:                    (struct ifnet *)control, p));
1.22      pk        425:
1.27      mycroft   426:        s = splsoftnet();
                    427:        inp = sotoinpcb(so);
1.28      mycroft   428: #ifdef DIAGNOSTIC
                    429:        if (req != PRU_SEND && req != PRU_SENDOOB && control)
                    430:                panic("rip_usrreq: unexpected control mbuf");
                    431: #endif
1.27      mycroft   432:        if (inp == 0 && req != PRU_ATTACH) {
1.22      pk        433:                error = EINVAL;
                    434:                goto release;
                    435:        }
                    436:
1.1       cgd       437:        switch (req) {
                    438:
                    439:        case PRU_ATTACH:
1.27      mycroft   440:                if (inp != 0) {
                    441:                        error = EISCONN;
                    442:                        break;
                    443:                }
1.26      mycroft   444:                if (p == 0 || (error = suser(p->p_ucred, &p->p_acflag))) {
1.13      mycroft   445:                        error = EACCES;
                    446:                        break;
                    447:                }
1.27      mycroft   448:                if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
                    449:                        error = soreserve(so, rip_sendspace, rip_recvspace);
                    450:                        if (error)
                    451:                                break;
                    452:                }
                    453:                error = in_pcballoc(so, &rawcbtable);
                    454:                if (error)
1.13      mycroft   455:                        break;
1.27      mycroft   456:                inp = sotoinpcb(so);
1.17      cgd       457:                inp->inp_ip.ip_p = (long)nam;
1.43    ! itojun    458: #ifdef IPSEC
        !           459:                error = ipsec_init_policy(&inp->inp_sp);
        !           460: #endif /*IPSEC*/
1.1       cgd       461:                break;
                    462:
                    463:        case PRU_DETACH:
1.13      mycroft   464: #ifdef MROUTING
1.6       hpeyerl   465:                if (so == ip_mrouter)
                    466:                        ip_mrouter_done();
                    467: #endif
1.13      mycroft   468:                in_pcbdetach(inp);
1.1       cgd       469:                break;
                    470:
                    471:        case PRU_BIND:
1.29      mycroft   472:                error = rip_bind(inp, nam);
1.27      mycroft   473:                break;
                    474:
                    475:        case PRU_LISTEN:
                    476:                error = EOPNOTSUPP;
                    477:                break;
                    478:
                    479:        case PRU_CONNECT:
                    480:                error = rip_connect(inp, nam);
                    481:                if (error)
1.13      mycroft   482:                        break;
1.1       cgd       483:                soisconnected(so);
1.13      mycroft   484:                break;
                    485:
                    486:        case PRU_CONNECT2:
                    487:                error = EOPNOTSUPP;
                    488:                break;
                    489:
1.27      mycroft   490:        case PRU_DISCONNECT:
                    491:                soisdisconnected(so);
                    492:                rip_disconnect(inp);
                    493:                break;
                    494:
1.13      mycroft   495:        /*
                    496:         * Mark the connection as being incapable of further input.
                    497:         */
                    498:        case PRU_SHUTDOWN:
                    499:                socantsendmore(so);
                    500:                break;
                    501:
1.27      mycroft   502:        case PRU_RCVD:
                    503:                error = EOPNOTSUPP;
                    504:                break;
                    505:
1.13      mycroft   506:        /*
                    507:         * Ship a packet out.  The appropriate raw output
                    508:         * routine handles any massaging necessary.
                    509:         */
                    510:        case PRU_SEND:
1.28      mycroft   511:                if (control && control->m_len) {
                    512:                        m_freem(control);
                    513:                        m_freem(m);
                    514:                        error = EINVAL;
                    515:                        break;
                    516:                }
                    517:        {
1.27      mycroft   518:                if (nam) {
                    519:                        if ((so->so_state & SS_ISCONNECTED) != 0) {
1.13      mycroft   520:                                error = EISCONN;
1.28      mycroft   521:                                goto die;
1.13      mycroft   522:                        }
1.27      mycroft   523:                        error = rip_connect(inp, nam);
                    524:                        if (error) {
1.28      mycroft   525:                        die:
1.27      mycroft   526:                                m_freem(m);
                    527:                                break;
                    528:                        }
1.13      mycroft   529:                } else {
1.27      mycroft   530:                        if ((so->so_state & SS_ISCONNECTED) == 0) {
1.13      mycroft   531:                                error = ENOTCONN;
1.28      mycroft   532:                                goto die;
1.13      mycroft   533:                        }
                    534:                }
1.27      mycroft   535:                error = rip_output(m, inp);
                    536:                if (nam)
                    537:                        rip_disconnect(inp);
1.28      mycroft   538:        }
1.13      mycroft   539:                break;
                    540:
                    541:        case PRU_SENSE:
                    542:                /*
                    543:                 * stat: don't bother with a blocksize.
                    544:                 */
1.27      mycroft   545:                splx(s);
1.1       cgd       546:                return (0);
1.13      mycroft   547:
                    548:        case PRU_RCVOOB:
1.27      mycroft   549:                error = EOPNOTSUPP;
                    550:                break;
                    551:
1.13      mycroft   552:        case PRU_SENDOOB:
1.28      mycroft   553:                m_freem(control);
1.27      mycroft   554:                m_freem(m);
1.13      mycroft   555:                error = EOPNOTSUPP;
                    556:                break;
                    557:
                    558:        case PRU_SOCKADDR:
                    559:                in_setsockaddr(inp, nam);
                    560:                break;
                    561:
                    562:        case PRU_PEERADDR:
                    563:                in_setpeeraddr(inp, nam);
                    564:                break;
                    565:
                    566:        default:
                    567:                panic("rip_usrreq");
1.1       cgd       568:        }
1.27      mycroft   569:
1.22      pk        570: release:
1.27      mycroft   571:        splx(s);
1.1       cgd       572:        return (error);
                    573: }

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