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Annotation of src/sys/netinet/raw_ip.c, Revision 1.63

1.63    ! simonb      1: /*     $NetBSD: raw_ip.c,v 1.62 2002/08/14 00:23:33 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>
1.63    ! simonb     68: __KERNEL_RCSID(0, "$NetBSD: raw_ip.c,v 1.62 2002/08/14 00:23:33 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:
1.1       cgd       129: /*
                    130:  * Setup generic address and protocol structures
                    131:  * for raw_input routine, then pass them along with
                    132:  * mbuf chain.
                    133:  */
1.9       mycroft   134: void
1.24      christos  135: #if __STDC__
                    136: rip_input(struct mbuf *m, ...)
                    137: #else
                    138: rip_input(m, va_alist)
1.1       cgd       139:        struct mbuf *m;
1.24      christos  140:        va_dcl
                    141: #endif
1.1       cgd       142: {
1.63    ! simonb    143:        int proto;
1.53      augustss  144:        struct ip *ip = mtod(m, struct ip *);
                    145:        struct inpcb *inp;
1.36      thorpej   146:        struct inpcb *last = 0;
                    147:        struct mbuf *opts = 0;
1.32      mycroft   148:        struct sockaddr_in ripsrc;
1.43      itojun    149:        va_list ap;
                    150:
                    151:        va_start(ap, m);
                    152:        proto = va_arg(ap, int);
                    153:        va_end(ap);
1.1       cgd       154:
1.32      mycroft   155:        ripsrc.sin_family = AF_INET;
                    156:        ripsrc.sin_len = sizeof(struct sockaddr_in);
1.1       cgd       157:        ripsrc.sin_addr = ip->ip_src;
1.34      mycroft   158:        ripsrc.sin_port = 0;
                    159:        bzero((caddr_t)ripsrc.sin_zero, sizeof(ripsrc.sin_zero));
1.42      thorpej   160:
                    161:        /*
                    162:         * XXX Compatibility: programs using raw IP expect ip_len
1.62      itojun    163:         * XXX to have the header length subtracted, and in host order.
                    164:         * XXX ip_off is also expected to be host order.
1.42      thorpej   165:         */
1.62      itojun    166:        ip->ip_len = ntohs(ip->ip_len) - (ip->ip_hl << 2);
                    167:        NTOHS(ip->ip_off);
1.32      mycroft   168:
1.58      matt      169:        CIRCLEQ_FOREACH(inp, &rawcbtable.inpt_queue, inp_queue) {
1.43      itojun    170:                if (inp->inp_ip.ip_p && inp->inp_ip.ip_p != proto)
1.13      mycroft   171:                        continue;
1.32      mycroft   172:                if (!in_nullhost(inp->inp_laddr) &&
                    173:                    !in_hosteq(inp->inp_laddr, ip->ip_dst))
1.13      mycroft   174:                        continue;
1.32      mycroft   175:                if (!in_nullhost(inp->inp_faddr) &&
                    176:                    !in_hosteq(inp->inp_faddr, ip->ip_src))
1.13      mycroft   177:                        continue;
                    178:                if (last) {
                    179:                        struct mbuf *n;
1.55      itojun    180:
                    181: #ifdef IPSEC
                    182:                        /* check AH/ESP integrity. */
                    183:                        if (ipsec4_in_reject_so(m, last->inp_socket)) {
                    184:                                ipsecstat.in_polvio++;
                    185:                                /* do not inject data to pcb */
                    186:                        } else
                    187: #endif /*IPSEC*/
1.24      christos  188:                        if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) {
1.36      thorpej   189:                                if (last->inp_flags & INP_CONTROLOPTS ||
                    190:                                    last->inp_socket->so_options & SO_TIMESTAMP)
                    191:                                        ip_savecontrol(last, &opts, ip, n);
                    192:                                if (sbappendaddr(&last->inp_socket->so_rcv,
                    193:                                    sintosa(&ripsrc), n, opts) == 0) {
1.13      mycroft   194:                                        /* should notify about lost packet */
                    195:                                        m_freem(n);
1.36      thorpej   196:                                        if (opts)
                    197:                                                m_freem(opts);
                    198:                                } else
                    199:                                        sorwakeup(last->inp_socket);
1.41      thorpej   200:                                opts = NULL;
1.13      mycroft   201:                        }
                    202:                }
1.36      thorpej   203:                last = inp;
1.13      mycroft   204:        }
1.55      itojun    205: #ifdef IPSEC
                    206:        /* check AH/ESP integrity. */
                    207:        if (last && ipsec4_in_reject_so(m, last->inp_socket)) {
                    208:                m_freem(m);
                    209:                ipsecstat.in_polvio++;
                    210:                ipstat.ips_delivered--;
                    211:                /* do not inject data to pcb */
                    212:        } else
                    213: #endif /*IPSEC*/
1.13      mycroft   214:        if (last) {
1.36      thorpej   215:                if (last->inp_flags & INP_CONTROLOPTS ||
                    216:                    last->inp_socket->so_options & SO_TIMESTAMP)
                    217:                        ip_savecontrol(last, &opts, ip, m);
                    218:                if (sbappendaddr(&last->inp_socket->so_rcv,
                    219:                    sintosa(&ripsrc), m, opts) == 0) {
1.13      mycroft   220:                        m_freem(m);
1.36      thorpej   221:                        if (opts)
                    222:                                m_freem(opts);
                    223:                } else
                    224:                        sorwakeup(last->inp_socket);
1.13      mycroft   225:        } else {
1.44      darrenr   226:                if (inetsw[ip_protox[ip->ip_p]].pr_input == rip_input) {
1.47      itojun    227:                        icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PROTOCOL,
                    228:                            0, 0);
1.44      darrenr   229:                        ipstat.ips_noproto++;
                    230:                        ipstat.ips_delivered--;
                    231:                } else
                    232:                        m_freem(m);
1.1       cgd       233:        }
1.43      itojun    234:        return;
1.60      itojun    235: }
                    236:
                    237: int
                    238: rip_pcbnotify(table, faddr, laddr, proto, errno, notify)
                    239:        struct inpcbtable *table;
                    240:        struct in_addr faddr, laddr;
                    241:        int proto;
                    242:        int errno;
                    243:        void (*notify) __P((struct inpcb *, int));
                    244: {
                    245:        struct inpcb *inp, *ninp;
                    246:        int nmatch;
                    247:
                    248:        nmatch = 0;
                    249:        for (inp = CIRCLEQ_FIRST(&table->inpt_queue);
                    250:            inp != (struct inpcb *)&table->inpt_queue;
                    251:            inp = ninp) {
                    252:                ninp = inp->inp_queue.cqe_next;
                    253:                if (inp->inp_ip.ip_p && inp->inp_ip.ip_p != proto)
                    254:                        continue;
                    255:                if (in_hosteq(inp->inp_faddr, faddr) &&
                    256:                    in_hosteq(inp->inp_laddr, laddr)) {
                    257:                        (*notify)(inp, errno);
                    258:                        nmatch++;
                    259:                }
                    260:        }
                    261:
                    262:        return nmatch;
                    263: }
                    264:
                    265: void *
                    266: rip_ctlinput(cmd, sa, v)
                    267:        int cmd;
                    268:        struct sockaddr *sa;
                    269:        void *v;
                    270: {
                    271:        struct ip *ip = v;
                    272:        void (*notify) __P((struct inpcb *, int)) = in_rtchange;
                    273:        int errno;
                    274:
                    275:        if (sa->sa_family != AF_INET ||
                    276:            sa->sa_len != sizeof(struct sockaddr_in))
                    277:                return NULL;
                    278:        if ((unsigned)cmd >= PRC_NCMDS)
                    279:                return NULL;
                    280:        errno = inetctlerrmap[cmd];
                    281:        if (PRC_IS_REDIRECT(cmd))
                    282:                notify = in_rtchange, ip = 0;
                    283:        else if (cmd == PRC_HOSTDEAD)
                    284:                ip = 0;
                    285:        else if (errno == 0)
                    286:                return NULL;
                    287:        if (ip) {
                    288:                rip_pcbnotify(&rawcbtable, satosin(sa)->sin_addr,
                    289:                    ip->ip_src, ip->ip_p, errno, notify);
                    290:
                    291:                /* XXX mapped address case */
                    292:        } else
                    293:                in_pcbnotifyall(&rawcbtable, satosin(sa)->sin_addr, errno,
                    294:                    notify);
                    295:        return NULL;
1.1       cgd       296: }
                    297:
                    298: /*
                    299:  * Generate IP header and pass packet to ip_output.
                    300:  * Tack on options user may have setup with control call.
                    301:  */
1.9       mycroft   302: int
1.24      christos  303: #if __STDC__
                    304: rip_output(struct mbuf *m, ...)
                    305: #else
                    306: rip_output(m, va_alist)
                    307:        struct mbuf *m;
                    308:        va_dcl
                    309: #endif
                    310: {
1.53      augustss  311:        struct inpcb *inp;
                    312:        struct ip *ip;
1.10      mycroft   313:        struct mbuf *opts;
1.24      christos  314:        int flags;
                    315:        va_list ap;
                    316:
                    317:        va_start(ap, m);
1.27      mycroft   318:        inp = va_arg(ap, struct inpcb *);
1.24      christos  319:        va_end(ap);
                    320:
1.27      mycroft   321:        flags =
1.37      matt      322:            (inp->inp_socket->so_options & SO_DONTROUTE) | IP_ALLOWBROADCAST
                    323:            | IP_RETURNMTU;
1.1       cgd       324:
                    325:        /*
                    326:         * If the user handed us a complete IP packet, use it.
                    327:         * Otherwise, allocate an mbuf for a header and fill it in.
                    328:         */
1.13      mycroft   329:        if ((inp->inp_flags & INP_HDRINCL) == 0) {
1.35      thorpej   330:                if ((m->m_pkthdr.len + sizeof(struct ip)) > IP_MAXPACKET) {
                    331:                        m_freem(m);
                    332:                        return (EMSGSIZE);
                    333:                }
1.1       cgd       334:                M_PREPEND(m, sizeof(struct ip), M_WAIT);
                    335:                ip = mtod(m, struct ip *);
                    336:                ip->ip_tos = 0;
1.62      itojun    337:                ip->ip_off = htons(0);
1.13      mycroft   338:                ip->ip_p = inp->inp_ip.ip_p;
1.62      itojun    339:                ip->ip_len = htons(m->m_pkthdr.len);
1.13      mycroft   340:                ip->ip_src = inp->inp_laddr;
1.27      mycroft   341:                ip->ip_dst = inp->inp_faddr;
1.1       cgd       342:                ip->ip_ttl = MAXTTL;
1.13      mycroft   343:                opts = inp->inp_options;
                    344:        } else {
1.35      thorpej   345:                if (m->m_pkthdr.len > IP_MAXPACKET) {
                    346:                        m_freem(m);
                    347:                        return (EMSGSIZE);
                    348:                }
1.13      mycroft   349:                ip = mtod(m, struct ip *);
1.62      itojun    350:                /* XXX userland passes ip_len and ip_off in host order */
1.38      mycroft   351:                if (m->m_pkthdr.len != ip->ip_len) {
                    352:                        m_freem(m);
                    353:                        return (EINVAL);
                    354:                }
1.62      itojun    355:                HTONS(ip->ip_len);
                    356:                HTONS(ip->ip_off);
1.13      mycroft   357:                if (ip->ip_id == 0)
                    358:                        ip->ip_id = htons(ip_id++);
                    359:                opts = NULL;
                    360:                /* XXX prevent ip_output from overwriting header fields */
                    361:                flags |= IP_RAWOUTPUT;
                    362:                ipstat.ips_rawout++;
1.1       cgd       363:        }
1.43      itojun    364: #ifdef IPSEC
1.54      itojun    365:        if (ipsec_setsocket(m, inp->inp_socket) != 0) {
                    366:                m_freem(m);
                    367:                return ENOBUFS;
                    368:        }
1.43      itojun    369: #endif /*IPSEC*/
1.62      itojun    370:        return (ip_output(m, opts, &inp->inp_route, flags, inp->inp_moptions,
                    371:            &inp->inp_errormtu));
1.1       cgd       372: }
                    373:
                    374: /*
                    375:  * Raw IP socket option processing.
                    376:  */
1.9       mycroft   377: int
1.1       cgd       378: rip_ctloutput(op, so, level, optname, m)
                    379:        int op;
                    380:        struct socket *so;
                    381:        int level, optname;
                    382:        struct mbuf **m;
                    383: {
1.53      augustss  384:        struct inpcb *inp = sotoinpcb(so);
1.31      mycroft   385:        int error = 0;
1.1       cgd       386:
1.15      mycroft   387:        if (level != IPPROTO_IP) {
1.31      mycroft   388:                error = ENOPROTOOPT;
                    389:                if (op == PRCO_SETOPT && *m != 0)
                    390:                        (void) m_free(*m);
                    391:        } else switch (op) {
                    392:
                    393:        case PRCO_SETOPT:
                    394:                switch (optname) {
                    395:                case IP_HDRINCL:
                    396:                        if (*m == 0 || (*m)->m_len < sizeof (int))
                    397:                                error = EINVAL;
                    398:                        else {
1.13      mycroft   399:                                if (*mtod(*m, int *))
                    400:                                        inp->inp_flags |= INP_HDRINCL;
                    401:                                else
                    402:                                        inp->inp_flags &= ~INP_HDRINCL;
                    403:                        }
1.31      mycroft   404:                        if (*m != 0)
                    405:                                (void) m_free(*m);
                    406:                        break;
                    407:
                    408: #ifdef MROUTING
                    409:                case MRT_INIT:
                    410:                case MRT_DONE:
                    411:                case MRT_ADD_VIF:
                    412:                case MRT_DEL_VIF:
                    413:                case MRT_ADD_MFC:
                    414:                case MRT_DEL_MFC:
                    415:                case MRT_ASSERT:
                    416:                        error = ip_mrouter_set(so, optname, m);
                    417:                        break;
                    418: #endif
                    419:
                    420:                default:
                    421:                        error = ip_ctloutput(op, so, level, optname, m);
                    422:                        break;
1.13      mycroft   423:                }
                    424:                break;
1.1       cgd       425:
1.31      mycroft   426:        case PRCO_GETOPT:
                    427:                switch (optname) {
                    428:                case IP_HDRINCL:
                    429:                        *m = m_get(M_WAIT, M_SOOPTS);
                    430:                        (*m)->m_len = sizeof (int);
                    431:                        *mtod(*m, int *) = inp->inp_flags & INP_HDRINCL ? 1 : 0;
                    432:                        break;
                    433:
1.6       hpeyerl   434: #ifdef MROUTING
1.31      mycroft   435:                case MRT_VERSION:
                    436:                case MRT_ASSERT:
                    437:                        error = ip_mrouter_get(so, optname, m);
1.18      mycroft   438:                        break;
1.31      mycroft   439: #endif
                    440:
1.18      mycroft   441:                default:
1.31      mycroft   442:                        error = ip_ctloutput(op, so, level, optname, m);
1.18      mycroft   443:                        break;
                    444:                }
1.31      mycroft   445:                break;
1.1       cgd       446:        }
1.31      mycroft   447:        return (error);
1.1       cgd       448: }
                    449:
1.27      mycroft   450: int
1.29      mycroft   451: rip_bind(inp, nam)
                    452:        struct inpcb *inp;
                    453:        struct mbuf *nam;
                    454: {
                    455:        struct sockaddr_in *addr = mtod(nam, struct sockaddr_in *);
                    456:
                    457:        if (nam->m_len != sizeof(*addr))
                    458:                return (EINVAL);
1.58      matt      459:        if (TAILQ_FIRST(&ifnet) == 0)
1.29      mycroft   460:                return (EADDRNOTAVAIL);
                    461:        if (addr->sin_family != AF_INET &&
                    462:            addr->sin_family != AF_IMPLINK)
                    463:                return (EAFNOSUPPORT);
1.32      mycroft   464:        if (!in_nullhost(addr->sin_addr) &&
1.29      mycroft   465:            ifa_ifwithaddr(sintosa(addr)) == 0)
                    466:                return (EADDRNOTAVAIL);
                    467:        inp->inp_laddr = addr->sin_addr;
                    468:        return (0);
                    469: }
                    470:
                    471: int
1.27      mycroft   472: rip_connect(inp, nam)
                    473:        struct inpcb *inp;
                    474:        struct mbuf *nam;
                    475: {
                    476:        struct sockaddr_in *addr = mtod(nam, struct sockaddr_in *);
                    477:
                    478:        if (nam->m_len != sizeof(*addr))
                    479:                return (EINVAL);
1.58      matt      480:        if (TAILQ_FIRST(&ifnet) == 0)
1.27      mycroft   481:                return (EADDRNOTAVAIL);
                    482:        if (addr->sin_family != AF_INET &&
                    483:            addr->sin_family != AF_IMPLINK)
                    484:                return (EAFNOSUPPORT);
                    485:        inp->inp_faddr = addr->sin_addr;
                    486:        return (0);
                    487: }
                    488:
                    489: void
                    490: rip_disconnect(inp)
                    491:        struct inpcb *inp;
                    492: {
                    493:
1.32      mycroft   494:        inp->inp_faddr = zeroin_addr;
1.27      mycroft   495: }
                    496:
1.13      mycroft   497: u_long rip_sendspace = RIPSNDQ;
                    498: u_long rip_recvspace = RIPRCVQ;
                    499:
1.1       cgd       500: /*ARGSUSED*/
1.9       mycroft   501: int
1.26      mycroft   502: rip_usrreq(so, req, m, nam, control, p)
1.53      augustss  503:        struct socket *so;
1.1       cgd       504:        int req;
1.2       cgd       505:        struct mbuf *m, *nam, *control;
1.26      mycroft   506:        struct proc *p;
1.1       cgd       507: {
1.53      augustss  508:        struct inpcb *inp;
1.27      mycroft   509:        int s;
1.53      augustss  510:        int error = 0;
1.13      mycroft   511: #ifdef MROUTING
1.6       hpeyerl   512:        extern struct socket *ip_mrouter;
                    513: #endif
1.27      mycroft   514:
1.22      pk        515:        if (req == PRU_CONTROL)
                    516:                return (in_control(so, (long)m, (caddr_t)nam,
1.26      mycroft   517:                    (struct ifnet *)control, p));
1.49      thorpej   518:
1.50      thorpej   519:        if (req == PRU_PURGEIF) {
1.56      itojun    520:                in_pcbpurgeif0(&rawcbtable, (struct ifnet *)control);
1.50      thorpej   521:                in_purgeif((struct ifnet *)control);
                    522:                in_pcbpurgeif(&rawcbtable, (struct ifnet *)control);
1.49      thorpej   523:                return (0);
                    524:        }
1.22      pk        525:
1.27      mycroft   526:        s = splsoftnet();
                    527:        inp = sotoinpcb(so);
1.28      mycroft   528: #ifdef DIAGNOSTIC
                    529:        if (req != PRU_SEND && req != PRU_SENDOOB && control)
                    530:                panic("rip_usrreq: unexpected control mbuf");
                    531: #endif
1.27      mycroft   532:        if (inp == 0 && req != PRU_ATTACH) {
1.22      pk        533:                error = EINVAL;
                    534:                goto release;
                    535:        }
                    536:
1.1       cgd       537:        switch (req) {
                    538:
                    539:        case PRU_ATTACH:
1.27      mycroft   540:                if (inp != 0) {
                    541:                        error = EISCONN;
                    542:                        break;
                    543:                }
1.26      mycroft   544:                if (p == 0 || (error = suser(p->p_ucred, &p->p_acflag))) {
1.13      mycroft   545:                        error = EACCES;
                    546:                        break;
                    547:                }
1.27      mycroft   548:                if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
                    549:                        error = soreserve(so, rip_sendspace, rip_recvspace);
                    550:                        if (error)
                    551:                                break;
                    552:                }
                    553:                error = in_pcballoc(so, &rawcbtable);
                    554:                if (error)
1.13      mycroft   555:                        break;
1.27      mycroft   556:                inp = sotoinpcb(so);
1.17      cgd       557:                inp->inp_ip.ip_p = (long)nam;
1.1       cgd       558:                break;
                    559:
                    560:        case PRU_DETACH:
1.13      mycroft   561: #ifdef MROUTING
1.6       hpeyerl   562:                if (so == ip_mrouter)
                    563:                        ip_mrouter_done();
                    564: #endif
1.13      mycroft   565:                in_pcbdetach(inp);
1.1       cgd       566:                break;
                    567:
                    568:        case PRU_BIND:
1.29      mycroft   569:                error = rip_bind(inp, nam);
1.27      mycroft   570:                break;
                    571:
                    572:        case PRU_LISTEN:
                    573:                error = EOPNOTSUPP;
                    574:                break;
                    575:
                    576:        case PRU_CONNECT:
                    577:                error = rip_connect(inp, nam);
                    578:                if (error)
1.13      mycroft   579:                        break;
1.1       cgd       580:                soisconnected(so);
1.13      mycroft   581:                break;
                    582:
                    583:        case PRU_CONNECT2:
                    584:                error = EOPNOTSUPP;
                    585:                break;
                    586:
1.27      mycroft   587:        case PRU_DISCONNECT:
                    588:                soisdisconnected(so);
                    589:                rip_disconnect(inp);
                    590:                break;
                    591:
1.13      mycroft   592:        /*
                    593:         * Mark the connection as being incapable of further input.
                    594:         */
                    595:        case PRU_SHUTDOWN:
                    596:                socantsendmore(so);
                    597:                break;
                    598:
1.27      mycroft   599:        case PRU_RCVD:
                    600:                error = EOPNOTSUPP;
                    601:                break;
                    602:
1.13      mycroft   603:        /*
                    604:         * Ship a packet out.  The appropriate raw output
                    605:         * routine handles any massaging necessary.
                    606:         */
                    607:        case PRU_SEND:
1.28      mycroft   608:                if (control && control->m_len) {
                    609:                        m_freem(control);
                    610:                        m_freem(m);
                    611:                        error = EINVAL;
                    612:                        break;
                    613:                }
                    614:        {
1.27      mycroft   615:                if (nam) {
                    616:                        if ((so->so_state & SS_ISCONNECTED) != 0) {
1.13      mycroft   617:                                error = EISCONN;
1.28      mycroft   618:                                goto die;
1.13      mycroft   619:                        }
1.27      mycroft   620:                        error = rip_connect(inp, nam);
                    621:                        if (error) {
1.28      mycroft   622:                        die:
1.27      mycroft   623:                                m_freem(m);
                    624:                                break;
                    625:                        }
1.13      mycroft   626:                } else {
1.27      mycroft   627:                        if ((so->so_state & SS_ISCONNECTED) == 0) {
1.13      mycroft   628:                                error = ENOTCONN;
1.28      mycroft   629:                                goto die;
1.13      mycroft   630:                        }
                    631:                }
1.27      mycroft   632:                error = rip_output(m, inp);
                    633:                if (nam)
                    634:                        rip_disconnect(inp);
1.28      mycroft   635:        }
1.13      mycroft   636:                break;
                    637:
                    638:        case PRU_SENSE:
                    639:                /*
                    640:                 * stat: don't bother with a blocksize.
                    641:                 */
1.27      mycroft   642:                splx(s);
1.1       cgd       643:                return (0);
1.13      mycroft   644:
                    645:        case PRU_RCVOOB:
1.27      mycroft   646:                error = EOPNOTSUPP;
                    647:                break;
                    648:
1.13      mycroft   649:        case PRU_SENDOOB:
1.28      mycroft   650:                m_freem(control);
1.27      mycroft   651:                m_freem(m);
1.13      mycroft   652:                error = EOPNOTSUPP;
                    653:                break;
                    654:
                    655:        case PRU_SOCKADDR:
                    656:                in_setsockaddr(inp, nam);
                    657:                break;
                    658:
                    659:        case PRU_PEERADDR:
                    660:                in_setpeeraddr(inp, nam);
                    661:                break;
                    662:
                    663:        default:
                    664:                panic("rip_usrreq");
1.1       cgd       665:        }
1.27      mycroft   666:
1.22      pk        667: release:
1.27      mycroft   668:        splx(s);
1.1       cgd       669:        return (error);
                    670: }

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