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Annotation of src/sys/netinet/raw_ip.c, Revision 1.62

1.62    ! itojun      1: /*     $NetBSD: raw_ip.c,v 1.61 2002/06/09 16:33:43 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.
                     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:  */
1.59      lukem      66:
                     67: #include <sys/cdefs.h>
1.62    ! itojun     68: __KERNEL_RCSID(0, "$NetBSD: raw_ip.c,v 1.61 2002/06/09 16:33:43 itojun Exp $");
1.40      scottr     69:
1.45      thorpej    70: #include "opt_ipsec.h"
1.40      scottr     71: #include "opt_mrouting.h"
1.1       cgd        72:
1.7       mycroft    73: #include <sys/param.h>
                     74: #include <sys/malloc.h>
                     75: #include <sys/mbuf.h>
                     76: #include <sys/socket.h>
                     77: #include <sys/protosw.h>
                     78: #include <sys/socketvar.h>
                     79: #include <sys/errno.h>
1.13      mycroft    80: #include <sys/systm.h>
1.26      mycroft    81: #include <sys/proc.h>
1.1       cgd        82:
1.7       mycroft    83: #include <net/if.h>
                     84: #include <net/route.h>
1.1       cgd        85:
1.7       mycroft    86: #include <netinet/in.h>
                     87: #include <netinet/in_systm.h>
                     88: #include <netinet/ip.h>
                     89: #include <netinet/ip_var.h>
1.13      mycroft    90: #include <netinet/ip_mroute.h>
1.44      darrenr    91: #include <netinet/ip_icmp.h>
1.7       mycroft    92: #include <netinet/in_pcb.h>
1.24      christos   93: #include <netinet/in_var.h>
                     94:
                     95: #include <machine/stdarg.h>
1.13      mycroft    96:
1.43      itojun     97: #ifdef IPSEC
                     98: #include <netinet6/ipsec.h>
                     99: #endif /*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:
1.43      itojun    129: static struct  sockaddr_in ripsrc = { sizeof(ripsrc), AF_INET };
                    130:
1.1       cgd       131: /*
                    132:  * Setup generic address and protocol structures
                    133:  * for raw_input routine, then pass them along with
                    134:  * mbuf chain.
                    135:  */
1.9       mycroft   136: void
1.24      christos  137: #if __STDC__
                    138: rip_input(struct mbuf *m, ...)
                    139: #else
                    140: rip_input(m, va_alist)
1.1       cgd       141:        struct mbuf *m;
1.24      christos  142:        va_dcl
                    143: #endif
1.1       cgd       144: {
1.43      itojun    145:        int off, proto;
1.53      augustss  146:        struct ip *ip = mtod(m, struct ip *);
                    147:        struct inpcb *inp;
1.36      thorpej   148:        struct inpcb *last = 0;
                    149:        struct mbuf *opts = 0;
1.32      mycroft   150:        struct sockaddr_in ripsrc;
1.43      itojun    151:        va_list ap;
                    152:
                    153:        va_start(ap, m);
                    154:        off = va_arg(ap, int);
                    155:        proto = va_arg(ap, int);
                    156:        va_end(ap);
1.1       cgd       157:
1.32      mycroft   158:        ripsrc.sin_family = AF_INET;
                    159:        ripsrc.sin_len = sizeof(struct sockaddr_in);
1.1       cgd       160:        ripsrc.sin_addr = ip->ip_src;
1.34      mycroft   161:        ripsrc.sin_port = 0;
                    162:        bzero((caddr_t)ripsrc.sin_zero, sizeof(ripsrc.sin_zero));
1.42      thorpej   163:
                    164:        /*
                    165:         * XXX Compatibility: programs using raw IP expect ip_len
1.62    ! itojun    166:         * XXX to have the header length subtracted, and in host order.
        !           167:         * XXX ip_off is also expected to be host order.
1.42      thorpej   168:         */
1.62    ! itojun    169:        ip->ip_len = ntohs(ip->ip_len) - (ip->ip_hl << 2);
        !           170:        NTOHS(ip->ip_off);
1.32      mycroft   171:
1.58      matt      172:        CIRCLEQ_FOREACH(inp, &rawcbtable.inpt_queue, inp_queue) {
1.43      itojun    173:                if (inp->inp_ip.ip_p && inp->inp_ip.ip_p != proto)
1.13      mycroft   174:                        continue;
1.32      mycroft   175:                if (!in_nullhost(inp->inp_laddr) &&
                    176:                    !in_hosteq(inp->inp_laddr, ip->ip_dst))
1.13      mycroft   177:                        continue;
1.32      mycroft   178:                if (!in_nullhost(inp->inp_faddr) &&
                    179:                    !in_hosteq(inp->inp_faddr, ip->ip_src))
1.13      mycroft   180:                        continue;
                    181:                if (last) {
                    182:                        struct mbuf *n;
1.55      itojun    183:
                    184: #ifdef IPSEC
                    185:                        /* check AH/ESP integrity. */
                    186:                        if (ipsec4_in_reject_so(m, last->inp_socket)) {
                    187:                                ipsecstat.in_polvio++;
                    188:                                /* do not inject data to pcb */
                    189:                        } else
                    190: #endif /*IPSEC*/
1.24      christos  191:                        if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) {
1.36      thorpej   192:                                if (last->inp_flags & INP_CONTROLOPTS ||
                    193:                                    last->inp_socket->so_options & SO_TIMESTAMP)
                    194:                                        ip_savecontrol(last, &opts, ip, n);
                    195:                                if (sbappendaddr(&last->inp_socket->so_rcv,
                    196:                                    sintosa(&ripsrc), n, opts) == 0) {
1.13      mycroft   197:                                        /* should notify about lost packet */
                    198:                                        m_freem(n);
1.36      thorpej   199:                                        if (opts)
                    200:                                                m_freem(opts);
                    201:                                } else
                    202:                                        sorwakeup(last->inp_socket);
1.41      thorpej   203:                                opts = NULL;
1.13      mycroft   204:                        }
                    205:                }
1.36      thorpej   206:                last = inp;
1.13      mycroft   207:        }
1.55      itojun    208: #ifdef IPSEC
                    209:        /* check AH/ESP integrity. */
                    210:        if (last && ipsec4_in_reject_so(m, last->inp_socket)) {
                    211:                m_freem(m);
                    212:                ipsecstat.in_polvio++;
                    213:                ipstat.ips_delivered--;
                    214:                /* do not inject data to pcb */
                    215:        } else
                    216: #endif /*IPSEC*/
1.13      mycroft   217:        if (last) {
1.36      thorpej   218:                if (last->inp_flags & INP_CONTROLOPTS ||
                    219:                    last->inp_socket->so_options & SO_TIMESTAMP)
                    220:                        ip_savecontrol(last, &opts, ip, m);
                    221:                if (sbappendaddr(&last->inp_socket->so_rcv,
                    222:                    sintosa(&ripsrc), m, opts) == 0) {
1.13      mycroft   223:                        m_freem(m);
1.36      thorpej   224:                        if (opts)
                    225:                                m_freem(opts);
                    226:                } else
                    227:                        sorwakeup(last->inp_socket);
1.13      mycroft   228:        } else {
1.44      darrenr   229:                if (inetsw[ip_protox[ip->ip_p]].pr_input == rip_input) {
1.47      itojun    230:                        icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PROTOCOL,
                    231:                            0, 0);
1.44      darrenr   232:                        ipstat.ips_noproto++;
                    233:                        ipstat.ips_delivered--;
                    234:                } else
                    235:                        m_freem(m);
1.1       cgd       236:        }
1.43      itojun    237:        return;
1.60      itojun    238: }
                    239:
                    240: int
                    241: rip_pcbnotify(table, faddr, laddr, proto, errno, notify)
                    242:        struct inpcbtable *table;
                    243:        struct in_addr faddr, laddr;
                    244:        int proto;
                    245:        int errno;
                    246:        void (*notify) __P((struct inpcb *, int));
                    247: {
                    248:        struct inpcb *inp, *ninp;
                    249:        int nmatch;
                    250:
                    251:        nmatch = 0;
                    252:        for (inp = CIRCLEQ_FIRST(&table->inpt_queue);
                    253:            inp != (struct inpcb *)&table->inpt_queue;
                    254:            inp = ninp) {
                    255:                ninp = inp->inp_queue.cqe_next;
                    256:                if (inp->inp_ip.ip_p && inp->inp_ip.ip_p != proto)
                    257:                        continue;
                    258:                if (in_hosteq(inp->inp_faddr, faddr) &&
                    259:                    in_hosteq(inp->inp_laddr, laddr)) {
                    260:                        (*notify)(inp, errno);
                    261:                        nmatch++;
                    262:                }
                    263:        }
                    264:
                    265:        return nmatch;
                    266: }
                    267:
                    268: void *
                    269: rip_ctlinput(cmd, sa, v)
                    270:        int cmd;
                    271:        struct sockaddr *sa;
                    272:        void *v;
                    273: {
                    274:        struct ip *ip = v;
                    275:        void (*notify) __P((struct inpcb *, int)) = in_rtchange;
                    276:        int errno;
                    277:
                    278:        if (sa->sa_family != AF_INET ||
                    279:            sa->sa_len != sizeof(struct sockaddr_in))
                    280:                return NULL;
                    281:        if ((unsigned)cmd >= PRC_NCMDS)
                    282:                return NULL;
                    283:        errno = inetctlerrmap[cmd];
                    284:        if (PRC_IS_REDIRECT(cmd))
                    285:                notify = in_rtchange, ip = 0;
                    286:        else if (cmd == PRC_HOSTDEAD)
                    287:                ip = 0;
                    288:        else if (errno == 0)
                    289:                return NULL;
                    290:        if (ip) {
                    291:                rip_pcbnotify(&rawcbtable, satosin(sa)->sin_addr,
                    292:                    ip->ip_src, ip->ip_p, errno, notify);
                    293:
                    294:                /* XXX mapped address case */
                    295:        } else
                    296:                in_pcbnotifyall(&rawcbtable, satosin(sa)->sin_addr, errno,
                    297:                    notify);
                    298:        return NULL;
1.1       cgd       299: }
                    300:
                    301: /*
                    302:  * Generate IP header and pass packet to ip_output.
                    303:  * Tack on options user may have setup with control call.
                    304:  */
1.9       mycroft   305: int
1.24      christos  306: #if __STDC__
                    307: rip_output(struct mbuf *m, ...)
                    308: #else
                    309: rip_output(m, va_alist)
                    310:        struct mbuf *m;
                    311:        va_dcl
                    312: #endif
                    313: {
1.53      augustss  314:        struct inpcb *inp;
                    315:        struct ip *ip;
1.10      mycroft   316:        struct mbuf *opts;
1.24      christos  317:        int flags;
                    318:        va_list ap;
                    319:
                    320:        va_start(ap, m);
1.27      mycroft   321:        inp = va_arg(ap, struct inpcb *);
1.24      christos  322:        va_end(ap);
                    323:
1.27      mycroft   324:        flags =
1.37      matt      325:            (inp->inp_socket->so_options & SO_DONTROUTE) | IP_ALLOWBROADCAST
                    326:            | IP_RETURNMTU;
1.1       cgd       327:
                    328:        /*
                    329:         * If the user handed us a complete IP packet, use it.
                    330:         * Otherwise, allocate an mbuf for a header and fill it in.
                    331:         */
1.13      mycroft   332:        if ((inp->inp_flags & INP_HDRINCL) == 0) {
1.35      thorpej   333:                if ((m->m_pkthdr.len + sizeof(struct ip)) > IP_MAXPACKET) {
                    334:                        m_freem(m);
                    335:                        return (EMSGSIZE);
                    336:                }
1.1       cgd       337:                M_PREPEND(m, sizeof(struct ip), M_WAIT);
                    338:                ip = mtod(m, struct ip *);
                    339:                ip->ip_tos = 0;
1.62    ! itojun    340:                ip->ip_off = htons(0);
1.13      mycroft   341:                ip->ip_p = inp->inp_ip.ip_p;
1.62    ! itojun    342:                ip->ip_len = htons(m->m_pkthdr.len);
1.13      mycroft   343:                ip->ip_src = inp->inp_laddr;
1.27      mycroft   344:                ip->ip_dst = inp->inp_faddr;
1.1       cgd       345:                ip->ip_ttl = MAXTTL;
1.13      mycroft   346:                opts = inp->inp_options;
                    347:        } else {
1.35      thorpej   348:                if (m->m_pkthdr.len > IP_MAXPACKET) {
                    349:                        m_freem(m);
                    350:                        return (EMSGSIZE);
                    351:                }
1.13      mycroft   352:                ip = mtod(m, struct ip *);
1.62    ! itojun    353:                /* XXX userland passes ip_len and ip_off in host order */
1.38      mycroft   354:                if (m->m_pkthdr.len != ip->ip_len) {
                    355:                        m_freem(m);
                    356:                        return (EINVAL);
                    357:                }
1.62    ! itojun    358:                HTONS(ip->ip_len);
        !           359:                HTONS(ip->ip_off);
1.13      mycroft   360:                if (ip->ip_id == 0)
                    361:                        ip->ip_id = htons(ip_id++);
                    362:                opts = NULL;
                    363:                /* XXX prevent ip_output from overwriting header fields */
                    364:                flags |= IP_RAWOUTPUT;
                    365:                ipstat.ips_rawout++;
1.1       cgd       366:        }
1.43      itojun    367: #ifdef IPSEC
1.54      itojun    368:        if (ipsec_setsocket(m, inp->inp_socket) != 0) {
                    369:                m_freem(m);
                    370:                return ENOBUFS;
                    371:        }
1.43      itojun    372: #endif /*IPSEC*/
1.62    ! itojun    373:        return (ip_output(m, opts, &inp->inp_route, flags, inp->inp_moptions,
        !           374:            &inp->inp_errormtu));
1.1       cgd       375: }
                    376:
                    377: /*
                    378:  * Raw IP socket option processing.
                    379:  */
1.9       mycroft   380: int
1.1       cgd       381: rip_ctloutput(op, so, level, optname, m)
                    382:        int op;
                    383:        struct socket *so;
                    384:        int level, optname;
                    385:        struct mbuf **m;
                    386: {
1.53      augustss  387:        struct inpcb *inp = sotoinpcb(so);
1.31      mycroft   388:        int error = 0;
1.1       cgd       389:
1.15      mycroft   390:        if (level != IPPROTO_IP) {
1.31      mycroft   391:                error = ENOPROTOOPT;
                    392:                if (op == PRCO_SETOPT && *m != 0)
                    393:                        (void) m_free(*m);
                    394:        } else switch (op) {
                    395:
                    396:        case PRCO_SETOPT:
                    397:                switch (optname) {
                    398:                case IP_HDRINCL:
                    399:                        if (*m == 0 || (*m)->m_len < sizeof (int))
                    400:                                error = EINVAL;
                    401:                        else {
1.13      mycroft   402:                                if (*mtod(*m, int *))
                    403:                                        inp->inp_flags |= INP_HDRINCL;
                    404:                                else
                    405:                                        inp->inp_flags &= ~INP_HDRINCL;
                    406:                        }
1.31      mycroft   407:                        if (*m != 0)
                    408:                                (void) m_free(*m);
                    409:                        break;
                    410:
                    411: #ifdef MROUTING
                    412:                case MRT_INIT:
                    413:                case MRT_DONE:
                    414:                case MRT_ADD_VIF:
                    415:                case MRT_DEL_VIF:
                    416:                case MRT_ADD_MFC:
                    417:                case MRT_DEL_MFC:
                    418:                case MRT_ASSERT:
                    419:                        error = ip_mrouter_set(so, optname, m);
                    420:                        break;
                    421: #endif
                    422:
                    423:                default:
                    424:                        error = ip_ctloutput(op, so, level, optname, m);
                    425:                        break;
1.13      mycroft   426:                }
                    427:                break;
1.1       cgd       428:
1.31      mycroft   429:        case PRCO_GETOPT:
                    430:                switch (optname) {
                    431:                case IP_HDRINCL:
                    432:                        *m = m_get(M_WAIT, M_SOOPTS);
                    433:                        (*m)->m_len = sizeof (int);
                    434:                        *mtod(*m, int *) = inp->inp_flags & INP_HDRINCL ? 1 : 0;
                    435:                        break;
                    436:
1.6       hpeyerl   437: #ifdef MROUTING
1.31      mycroft   438:                case MRT_VERSION:
                    439:                case MRT_ASSERT:
                    440:                        error = ip_mrouter_get(so, optname, m);
1.18      mycroft   441:                        break;
1.31      mycroft   442: #endif
                    443:
1.18      mycroft   444:                default:
1.31      mycroft   445:                        error = ip_ctloutput(op, so, level, optname, m);
1.18      mycroft   446:                        break;
                    447:                }
1.31      mycroft   448:                break;
1.1       cgd       449:        }
1.31      mycroft   450:        return (error);
1.1       cgd       451: }
                    452:
1.27      mycroft   453: int
1.29      mycroft   454: rip_bind(inp, nam)
                    455:        struct inpcb *inp;
                    456:        struct mbuf *nam;
                    457: {
                    458:        struct sockaddr_in *addr = mtod(nam, struct sockaddr_in *);
                    459:
                    460:        if (nam->m_len != sizeof(*addr))
                    461:                return (EINVAL);
1.58      matt      462:        if (TAILQ_FIRST(&ifnet) == 0)
1.29      mycroft   463:                return (EADDRNOTAVAIL);
                    464:        if (addr->sin_family != AF_INET &&
                    465:            addr->sin_family != AF_IMPLINK)
                    466:                return (EAFNOSUPPORT);
1.32      mycroft   467:        if (!in_nullhost(addr->sin_addr) &&
1.29      mycroft   468:            ifa_ifwithaddr(sintosa(addr)) == 0)
                    469:                return (EADDRNOTAVAIL);
                    470:        inp->inp_laddr = addr->sin_addr;
                    471:        return (0);
                    472: }
                    473:
                    474: int
1.27      mycroft   475: rip_connect(inp, nam)
                    476:        struct inpcb *inp;
                    477:        struct mbuf *nam;
                    478: {
                    479:        struct sockaddr_in *addr = mtod(nam, struct sockaddr_in *);
                    480:
                    481:        if (nam->m_len != sizeof(*addr))
                    482:                return (EINVAL);
1.58      matt      483:        if (TAILQ_FIRST(&ifnet) == 0)
1.27      mycroft   484:                return (EADDRNOTAVAIL);
                    485:        if (addr->sin_family != AF_INET &&
                    486:            addr->sin_family != AF_IMPLINK)
                    487:                return (EAFNOSUPPORT);
                    488:        inp->inp_faddr = addr->sin_addr;
                    489:        return (0);
                    490: }
                    491:
                    492: void
                    493: rip_disconnect(inp)
                    494:        struct inpcb *inp;
                    495: {
                    496:
1.32      mycroft   497:        inp->inp_faddr = zeroin_addr;
1.27      mycroft   498: }
                    499:
1.13      mycroft   500: u_long rip_sendspace = RIPSNDQ;
                    501: u_long rip_recvspace = RIPRCVQ;
                    502:
1.1       cgd       503: /*ARGSUSED*/
1.9       mycroft   504: int
1.26      mycroft   505: rip_usrreq(so, req, m, nam, control, p)
1.53      augustss  506:        struct socket *so;
1.1       cgd       507:        int req;
1.2       cgd       508:        struct mbuf *m, *nam, *control;
1.26      mycroft   509:        struct proc *p;
1.1       cgd       510: {
1.53      augustss  511:        struct inpcb *inp;
1.27      mycroft   512:        int s;
1.53      augustss  513:        int error = 0;
1.13      mycroft   514: #ifdef MROUTING
1.6       hpeyerl   515:        extern struct socket *ip_mrouter;
                    516: #endif
1.27      mycroft   517:
1.22      pk        518:        if (req == PRU_CONTROL)
                    519:                return (in_control(so, (long)m, (caddr_t)nam,
1.26      mycroft   520:                    (struct ifnet *)control, p));
1.49      thorpej   521:
1.50      thorpej   522:        if (req == PRU_PURGEIF) {
1.56      itojun    523:                in_pcbpurgeif0(&rawcbtable, (struct ifnet *)control);
1.50      thorpej   524:                in_purgeif((struct ifnet *)control);
                    525:                in_pcbpurgeif(&rawcbtable, (struct ifnet *)control);
1.49      thorpej   526:                return (0);
                    527:        }
1.22      pk        528:
1.27      mycroft   529:        s = splsoftnet();
                    530:        inp = sotoinpcb(so);
1.28      mycroft   531: #ifdef DIAGNOSTIC
                    532:        if (req != PRU_SEND && req != PRU_SENDOOB && control)
                    533:                panic("rip_usrreq: unexpected control mbuf");
                    534: #endif
1.27      mycroft   535:        if (inp == 0 && req != PRU_ATTACH) {
1.22      pk        536:                error = EINVAL;
                    537:                goto release;
                    538:        }
                    539:
1.1       cgd       540:        switch (req) {
                    541:
                    542:        case PRU_ATTACH:
1.27      mycroft   543:                if (inp != 0) {
                    544:                        error = EISCONN;
                    545:                        break;
                    546:                }
1.26      mycroft   547:                if (p == 0 || (error = suser(p->p_ucred, &p->p_acflag))) {
1.13      mycroft   548:                        error = EACCES;
                    549:                        break;
                    550:                }
1.27      mycroft   551:                if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
                    552:                        error = soreserve(so, rip_sendspace, rip_recvspace);
                    553:                        if (error)
                    554:                                break;
                    555:                }
                    556:                error = in_pcballoc(so, &rawcbtable);
                    557:                if (error)
1.13      mycroft   558:                        break;
1.27      mycroft   559:                inp = sotoinpcb(so);
1.17      cgd       560:                inp->inp_ip.ip_p = (long)nam;
1.1       cgd       561:                break;
                    562:
                    563:        case PRU_DETACH:
1.13      mycroft   564: #ifdef MROUTING
1.6       hpeyerl   565:                if (so == ip_mrouter)
                    566:                        ip_mrouter_done();
                    567: #endif
1.13      mycroft   568:                in_pcbdetach(inp);
1.1       cgd       569:                break;
                    570:
                    571:        case PRU_BIND:
1.29      mycroft   572:                error = rip_bind(inp, nam);
1.27      mycroft   573:                break;
                    574:
                    575:        case PRU_LISTEN:
                    576:                error = EOPNOTSUPP;
                    577:                break;
                    578:
                    579:        case PRU_CONNECT:
                    580:                error = rip_connect(inp, nam);
                    581:                if (error)
1.13      mycroft   582:                        break;
1.1       cgd       583:                soisconnected(so);
1.13      mycroft   584:                break;
                    585:
                    586:        case PRU_CONNECT2:
                    587:                error = EOPNOTSUPP;
                    588:                break;
                    589:
1.27      mycroft   590:        case PRU_DISCONNECT:
                    591:                soisdisconnected(so);
                    592:                rip_disconnect(inp);
                    593:                break;
                    594:
1.13      mycroft   595:        /*
                    596:         * Mark the connection as being incapable of further input.
                    597:         */
                    598:        case PRU_SHUTDOWN:
                    599:                socantsendmore(so);
                    600:                break;
                    601:
1.27      mycroft   602:        case PRU_RCVD:
                    603:                error = EOPNOTSUPP;
                    604:                break;
                    605:
1.13      mycroft   606:        /*
                    607:         * Ship a packet out.  The appropriate raw output
                    608:         * routine handles any massaging necessary.
                    609:         */
                    610:        case PRU_SEND:
1.28      mycroft   611:                if (control && control->m_len) {
                    612:                        m_freem(control);
                    613:                        m_freem(m);
                    614:                        error = EINVAL;
                    615:                        break;
                    616:                }
                    617:        {
1.27      mycroft   618:                if (nam) {
                    619:                        if ((so->so_state & SS_ISCONNECTED) != 0) {
1.13      mycroft   620:                                error = EISCONN;
1.28      mycroft   621:                                goto die;
1.13      mycroft   622:                        }
1.27      mycroft   623:                        error = rip_connect(inp, nam);
                    624:                        if (error) {
1.28      mycroft   625:                        die:
1.27      mycroft   626:                                m_freem(m);
                    627:                                break;
                    628:                        }
1.13      mycroft   629:                } else {
1.27      mycroft   630:                        if ((so->so_state & SS_ISCONNECTED) == 0) {
1.13      mycroft   631:                                error = ENOTCONN;
1.28      mycroft   632:                                goto die;
1.13      mycroft   633:                        }
                    634:                }
1.27      mycroft   635:                error = rip_output(m, inp);
                    636:                if (nam)
                    637:                        rip_disconnect(inp);
1.28      mycroft   638:        }
1.13      mycroft   639:                break;
                    640:
                    641:        case PRU_SENSE:
                    642:                /*
                    643:                 * stat: don't bother with a blocksize.
                    644:                 */
1.27      mycroft   645:                splx(s);
1.1       cgd       646:                return (0);
1.13      mycroft   647:
                    648:        case PRU_RCVOOB:
1.27      mycroft   649:                error = EOPNOTSUPP;
                    650:                break;
                    651:
1.13      mycroft   652:        case PRU_SENDOOB:
1.28      mycroft   653:                m_freem(control);
1.27      mycroft   654:                m_freem(m);
1.13      mycroft   655:                error = EOPNOTSUPP;
                    656:                break;
                    657:
                    658:        case PRU_SOCKADDR:
                    659:                in_setsockaddr(inp, nam);
                    660:                break;
                    661:
                    662:        case PRU_PEERADDR:
                    663:                in_setpeeraddr(inp, nam);
                    664:                break;
                    665:
                    666:        default:
                    667:                panic("rip_usrreq");
1.1       cgd       668:        }
1.27      mycroft   669:
1.22      pk        670: release:
1.27      mycroft   671:        splx(s);
1.1       cgd       672:        return (error);
                    673: }

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