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Annotation of src/sys/netinet/raw_ip.c, Revision 1.71

1.71    ! agc         1: /*     $NetBSD: raw_ip.c,v 1.70 2003/06/29 22:31:57 fvdl Exp $ */
1.43      itojun      2:
                      3: /*
                      4:  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
                      5:  * All rights reserved.
1.61      itojun      6:  *
1.43      itojun      7:  * Redistribution and use in source and binary forms, with or without
                      8:  * modification, are permitted provided that the following conditions
                      9:  * are met:
                     10:  * 1. Redistributions of source code must retain the above copyright
                     11:  *    notice, this list of conditions and the following disclaimer.
                     12:  * 2. Redistributions in binary form must reproduce the above copyright
                     13:  *    notice, this list of conditions and the following disclaimer in the
                     14:  *    documentation and/or other materials provided with the distribution.
                     15:  * 3. Neither the name of the project nor the names of its contributors
                     16:  *    may be used to endorse or promote products derived from this software
                     17:  *    without specific prior written permission.
1.61      itojun     18:  *
1.43      itojun     19:  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
                     20:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     21:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     22:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
                     23:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     24:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     25:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     26:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     27:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     28:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     29:  * SUCH DAMAGE.
                     30:  */
1.14      cgd        31:
1.1       cgd        32: /*
1.13      mycroft    33:  * Copyright (c) 1982, 1986, 1988, 1993
                     34:  *     The Regents of the University of California.  All rights reserved.
1.1       cgd        35:  *
                     36:  * Redistribution and use in source and binary forms, with or without
                     37:  * modification, are permitted provided that the following conditions
                     38:  * are met:
                     39:  * 1. Redistributions of source code must retain the above copyright
                     40:  *    notice, this list of conditions and the following disclaimer.
                     41:  * 2. Redistributions in binary form must reproduce the above copyright
                     42:  *    notice, this list of conditions and the following disclaimer in the
                     43:  *    documentation and/or other materials provided with the distribution.
1.71    ! agc        44:  * 3. Neither the name of the University nor the names of its contributors
1.1       cgd        45:  *    may be used to endorse or promote products derived from this software
                     46:  *    without specific prior written permission.
                     47:  *
                     48:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     49:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     50:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     51:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     52:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     53:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     54:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     55:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     56:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     57:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     58:  * SUCH DAMAGE.
                     59:  *
1.39      thorpej    60:  *     @(#)raw_ip.c    8.7 (Berkeley) 5/15/95
1.1       cgd        61:  */
1.59      lukem      62:
                     63: #include <sys/cdefs.h>
1.71    ! agc        64: __KERNEL_RCSID(0, "$NetBSD: raw_ip.c,v 1.70 2003/06/29 22:31:57 fvdl Exp $");
1.40      scottr     65:
1.45      thorpej    66: #include "opt_ipsec.h"
1.40      scottr     67: #include "opt_mrouting.h"
1.1       cgd        68:
1.7       mycroft    69: #include <sys/param.h>
                     70: #include <sys/malloc.h>
                     71: #include <sys/mbuf.h>
                     72: #include <sys/socket.h>
                     73: #include <sys/protosw.h>
                     74: #include <sys/socketvar.h>
                     75: #include <sys/errno.h>
1.13      mycroft    76: #include <sys/systm.h>
1.26      mycroft    77: #include <sys/proc.h>
1.1       cgd        78:
1.7       mycroft    79: #include <net/if.h>
                     80: #include <net/route.h>
1.1       cgd        81:
1.7       mycroft    82: #include <netinet/in.h>
                     83: #include <netinet/in_systm.h>
                     84: #include <netinet/ip.h>
                     85: #include <netinet/ip_var.h>
1.13      mycroft    86: #include <netinet/ip_mroute.h>
1.44      darrenr    87: #include <netinet/ip_icmp.h>
1.7       mycroft    88: #include <netinet/in_pcb.h>
1.24      christos   89: #include <netinet/in_var.h>
                     90:
                     91: #include <machine/stdarg.h>
1.13      mycroft    92:
1.43      itojun     93: #ifdef IPSEC
                     94: #include <netinet6/ipsec.h>
                     95: #endif /*IPSEC*/
                     96:
1.20      mycroft    97: struct inpcbtable rawcbtable;
1.30      pk         98:
1.60      itojun     99: int     rip_pcbnotify __P((struct inpcbtable *, struct in_addr,
                    100:     struct in_addr, int, int, void (*) __P((struct inpcb *, int))));
1.30      pk        101: int     rip_bind __P((struct inpcb *, struct mbuf *));
                    102: int     rip_connect __P((struct inpcb *, struct mbuf *));
                    103: void    rip_disconnect __P((struct inpcb *));
1.13      mycroft   104:
                    105: /*
                    106:  * Nominal space allocated to a raw ip socket.
                    107:  */
                    108: #define        RIPSNDQ         8192
                    109: #define        RIPRCVQ         8192
1.1       cgd       110:
                    111: /*
                    112:  * Raw interface to IP protocol.
                    113:  */
1.13      mycroft   114:
                    115: /*
                    116:  * Initialize raw connection block q.
                    117:  */
                    118: void
                    119: rip_init()
                    120: {
                    121:
1.33      mycroft   122:        in_pcbinit(&rawcbtable, 1, 1);
1.13      mycroft   123: }
                    124:
1.1       cgd       125: /*
                    126:  * Setup generic address and protocol structures
                    127:  * for raw_input routine, then pass them along with
                    128:  * mbuf chain.
                    129:  */
1.9       mycroft   130: void
1.24      christos  131: #if __STDC__
                    132: rip_input(struct mbuf *m, ...)
                    133: #else
                    134: rip_input(m, va_alist)
1.1       cgd       135:        struct mbuf *m;
1.24      christos  136:        va_dcl
                    137: #endif
1.1       cgd       138: {
1.63      simonb    139:        int proto;
1.53      augustss  140:        struct ip *ip = mtod(m, struct ip *);
                    141:        struct inpcb *inp;
1.36      thorpej   142:        struct inpcb *last = 0;
                    143:        struct mbuf *opts = 0;
1.32      mycroft   144:        struct sockaddr_in ripsrc;
1.43      itojun    145:        va_list ap;
                    146:
                    147:        va_start(ap, m);
1.64      simonb    148:        (void)va_arg(ap, int);          /* ignore value, advance ap */
1.43      itojun    149:        proto = va_arg(ap, int);
                    150:        va_end(ap);
1.1       cgd       151:
1.32      mycroft   152:        ripsrc.sin_family = AF_INET;
                    153:        ripsrc.sin_len = sizeof(struct sockaddr_in);
1.1       cgd       154:        ripsrc.sin_addr = ip->ip_src;
1.34      mycroft   155:        ripsrc.sin_port = 0;
                    156:        bzero((caddr_t)ripsrc.sin_zero, sizeof(ripsrc.sin_zero));
1.42      thorpej   157:
                    158:        /*
                    159:         * XXX Compatibility: programs using raw IP expect ip_len
1.62      itojun    160:         * XXX to have the header length subtracted, and in host order.
                    161:         * XXX ip_off is also expected to be host order.
1.42      thorpej   162:         */
1.62      itojun    163:        ip->ip_len = ntohs(ip->ip_len) - (ip->ip_hl << 2);
                    164:        NTOHS(ip->ip_off);
1.32      mycroft   165:
1.58      matt      166:        CIRCLEQ_FOREACH(inp, &rawcbtable.inpt_queue, inp_queue) {
1.43      itojun    167:                if (inp->inp_ip.ip_p && inp->inp_ip.ip_p != proto)
1.13      mycroft   168:                        continue;
1.32      mycroft   169:                if (!in_nullhost(inp->inp_laddr) &&
                    170:                    !in_hosteq(inp->inp_laddr, ip->ip_dst))
1.13      mycroft   171:                        continue;
1.32      mycroft   172:                if (!in_nullhost(inp->inp_faddr) &&
                    173:                    !in_hosteq(inp->inp_faddr, ip->ip_src))
1.13      mycroft   174:                        continue;
                    175:                if (last) {
                    176:                        struct mbuf *n;
1.55      itojun    177:
                    178: #ifdef IPSEC
                    179:                        /* check AH/ESP integrity. */
                    180:                        if (ipsec4_in_reject_so(m, last->inp_socket)) {
                    181:                                ipsecstat.in_polvio++;
                    182:                                /* do not inject data to pcb */
                    183:                        } else
                    184: #endif /*IPSEC*/
1.24      christos  185:                        if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) {
1.36      thorpej   186:                                if (last->inp_flags & INP_CONTROLOPTS ||
                    187:                                    last->inp_socket->so_options & SO_TIMESTAMP)
                    188:                                        ip_savecontrol(last, &opts, ip, n);
                    189:                                if (sbappendaddr(&last->inp_socket->so_rcv,
                    190:                                    sintosa(&ripsrc), n, opts) == 0) {
1.13      mycroft   191:                                        /* should notify about lost packet */
                    192:                                        m_freem(n);
1.36      thorpej   193:                                        if (opts)
                    194:                                                m_freem(opts);
                    195:                                } else
                    196:                                        sorwakeup(last->inp_socket);
1.41      thorpej   197:                                opts = NULL;
1.13      mycroft   198:                        }
                    199:                }
1.36      thorpej   200:                last = inp;
1.13      mycroft   201:        }
1.55      itojun    202: #ifdef IPSEC
                    203:        /* check AH/ESP integrity. */
                    204:        if (last && ipsec4_in_reject_so(m, last->inp_socket)) {
                    205:                m_freem(m);
                    206:                ipsecstat.in_polvio++;
                    207:                ipstat.ips_delivered--;
                    208:                /* do not inject data to pcb */
                    209:        } else
                    210: #endif /*IPSEC*/
1.13      mycroft   211:        if (last) {
1.36      thorpej   212:                if (last->inp_flags & INP_CONTROLOPTS ||
                    213:                    last->inp_socket->so_options & SO_TIMESTAMP)
                    214:                        ip_savecontrol(last, &opts, ip, m);
                    215:                if (sbappendaddr(&last->inp_socket->so_rcv,
                    216:                    sintosa(&ripsrc), m, opts) == 0) {
1.13      mycroft   217:                        m_freem(m);
1.36      thorpej   218:                        if (opts)
                    219:                                m_freem(opts);
                    220:                } else
                    221:                        sorwakeup(last->inp_socket);
1.13      mycroft   222:        } else {
1.44      darrenr   223:                if (inetsw[ip_protox[ip->ip_p]].pr_input == rip_input) {
1.47      itojun    224:                        icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PROTOCOL,
                    225:                            0, 0);
1.44      darrenr   226:                        ipstat.ips_noproto++;
                    227:                        ipstat.ips_delivered--;
                    228:                } else
                    229:                        m_freem(m);
1.1       cgd       230:        }
1.43      itojun    231:        return;
1.60      itojun    232: }
                    233:
                    234: int
                    235: rip_pcbnotify(table, faddr, laddr, proto, errno, notify)
                    236:        struct inpcbtable *table;
                    237:        struct in_addr faddr, laddr;
                    238:        int proto;
                    239:        int errno;
                    240:        void (*notify) __P((struct inpcb *, int));
                    241: {
                    242:        struct inpcb *inp, *ninp;
                    243:        int nmatch;
                    244:
                    245:        nmatch = 0;
                    246:        for (inp = CIRCLEQ_FIRST(&table->inpt_queue);
                    247:            inp != (struct inpcb *)&table->inpt_queue;
                    248:            inp = ninp) {
                    249:                ninp = inp->inp_queue.cqe_next;
                    250:                if (inp->inp_ip.ip_p && inp->inp_ip.ip_p != proto)
                    251:                        continue;
                    252:                if (in_hosteq(inp->inp_faddr, faddr) &&
                    253:                    in_hosteq(inp->inp_laddr, laddr)) {
                    254:                        (*notify)(inp, errno);
                    255:                        nmatch++;
                    256:                }
                    257:        }
                    258:
                    259:        return nmatch;
                    260: }
                    261:
                    262: void *
                    263: rip_ctlinput(cmd, sa, v)
                    264:        int cmd;
                    265:        struct sockaddr *sa;
                    266:        void *v;
                    267: {
                    268:        struct ip *ip = v;
                    269:        void (*notify) __P((struct inpcb *, int)) = in_rtchange;
                    270:        int errno;
                    271:
                    272:        if (sa->sa_family != AF_INET ||
                    273:            sa->sa_len != sizeof(struct sockaddr_in))
                    274:                return NULL;
                    275:        if ((unsigned)cmd >= PRC_NCMDS)
                    276:                return NULL;
                    277:        errno = inetctlerrmap[cmd];
                    278:        if (PRC_IS_REDIRECT(cmd))
                    279:                notify = in_rtchange, ip = 0;
                    280:        else if (cmd == PRC_HOSTDEAD)
                    281:                ip = 0;
                    282:        else if (errno == 0)
                    283:                return NULL;
                    284:        if (ip) {
                    285:                rip_pcbnotify(&rawcbtable, satosin(sa)->sin_addr,
                    286:                    ip->ip_src, ip->ip_p, errno, notify);
                    287:
                    288:                /* XXX mapped address case */
                    289:        } else
                    290:                in_pcbnotifyall(&rawcbtable, satosin(sa)->sin_addr, errno,
                    291:                    notify);
                    292:        return NULL;
1.1       cgd       293: }
                    294:
                    295: /*
                    296:  * Generate IP header and pass packet to ip_output.
                    297:  * Tack on options user may have setup with control call.
                    298:  */
1.9       mycroft   299: int
1.24      christos  300: #if __STDC__
                    301: rip_output(struct mbuf *m, ...)
                    302: #else
                    303: rip_output(m, va_alist)
                    304:        struct mbuf *m;
                    305:        va_dcl
                    306: #endif
                    307: {
1.53      augustss  308:        struct inpcb *inp;
                    309:        struct ip *ip;
1.10      mycroft   310:        struct mbuf *opts;
1.24      christos  311:        int flags;
                    312:        va_list ap;
                    313:
                    314:        va_start(ap, m);
1.27      mycroft   315:        inp = va_arg(ap, struct inpcb *);
1.24      christos  316:        va_end(ap);
                    317:
1.27      mycroft   318:        flags =
1.37      matt      319:            (inp->inp_socket->so_options & SO_DONTROUTE) | IP_ALLOWBROADCAST
                    320:            | IP_RETURNMTU;
1.1       cgd       321:
                    322:        /*
                    323:         * If the user handed us a complete IP packet, use it.
                    324:         * Otherwise, allocate an mbuf for a header and fill it in.
                    325:         */
1.13      mycroft   326:        if ((inp->inp_flags & INP_HDRINCL) == 0) {
1.35      thorpej   327:                if ((m->m_pkthdr.len + sizeof(struct ip)) > IP_MAXPACKET) {
                    328:                        m_freem(m);
                    329:                        return (EMSGSIZE);
                    330:                }
1.68      itojun    331:                M_PREPEND(m, sizeof(struct ip), M_DONTWAIT);
                    332:                if (!m)
                    333:                        return (ENOBUFS);
1.1       cgd       334:                ip = mtod(m, struct ip *);
                    335:                ip->ip_tos = 0;
1.62      itojun    336:                ip->ip_off = htons(0);
1.13      mycroft   337:                ip->ip_p = inp->inp_ip.ip_p;
1.62      itojun    338:                ip->ip_len = htons(m->m_pkthdr.len);
1.13      mycroft   339:                ip->ip_src = inp->inp_laddr;
1.27      mycroft   340:                ip->ip_dst = inp->inp_faddr;
1.1       cgd       341:                ip->ip_ttl = MAXTTL;
1.13      mycroft   342:                opts = inp->inp_options;
                    343:        } else {
1.35      thorpej   344:                if (m->m_pkthdr.len > IP_MAXPACKET) {
                    345:                        m_freem(m);
                    346:                        return (EMSGSIZE);
                    347:                }
1.13      mycroft   348:                ip = mtod(m, struct ip *);
1.65      thorpej   349:
                    350:                /*
                    351:                 * If the mbuf is read-only, we need to allocate
                    352:                 * a new mbuf for the header, since we need to
                    353:                 * modify the header.
                    354:                 */
                    355:                if (M_READONLY(m)) {
                    356:                        int hlen = ip->ip_hl << 2;
                    357:
                    358:                        m = m_copyup(m, hlen, (max_linkhdr + 3) & ~3);
                    359:                        if (m == NULL)
                    360:                                return (ENOMEM);        /* XXX */
                    361:                        ip = mtod(m, struct ip *);
                    362:                }
                    363:
1.62      itojun    364:                /* XXX userland passes ip_len and ip_off in host order */
1.38      mycroft   365:                if (m->m_pkthdr.len != ip->ip_len) {
                    366:                        m_freem(m);
                    367:                        return (EINVAL);
                    368:                }
1.62      itojun    369:                HTONS(ip->ip_len);
                    370:                HTONS(ip->ip_off);
1.13      mycroft   371:                if (ip->ip_id == 0)
                    372:                        ip->ip_id = htons(ip_id++);
                    373:                opts = NULL;
                    374:                /* XXX prevent ip_output from overwriting header fields */
                    375:                flags |= IP_RAWOUTPUT;
                    376:                ipstat.ips_rawout++;
1.1       cgd       377:        }
1.43      itojun    378: #ifdef IPSEC
1.54      itojun    379:        if (ipsec_setsocket(m, inp->inp_socket) != 0) {
                    380:                m_freem(m);
                    381:                return ENOBUFS;
                    382:        }
1.43      itojun    383: #endif /*IPSEC*/
1.62      itojun    384:        return (ip_output(m, opts, &inp->inp_route, flags, inp->inp_moptions,
                    385:            &inp->inp_errormtu));
1.1       cgd       386: }
                    387:
                    388: /*
                    389:  * Raw IP socket option processing.
                    390:  */
1.9       mycroft   391: int
1.1       cgd       392: rip_ctloutput(op, so, level, optname, m)
                    393:        int op;
                    394:        struct socket *so;
                    395:        int level, optname;
                    396:        struct mbuf **m;
                    397: {
1.53      augustss  398:        struct inpcb *inp = sotoinpcb(so);
1.31      mycroft   399:        int error = 0;
1.1       cgd       400:
1.15      mycroft   401:        if (level != IPPROTO_IP) {
1.31      mycroft   402:                error = ENOPROTOOPT;
                    403:                if (op == PRCO_SETOPT && *m != 0)
                    404:                        (void) m_free(*m);
                    405:        } else switch (op) {
                    406:
                    407:        case PRCO_SETOPT:
                    408:                switch (optname) {
                    409:                case IP_HDRINCL:
                    410:                        if (*m == 0 || (*m)->m_len < sizeof (int))
                    411:                                error = EINVAL;
                    412:                        else {
1.13      mycroft   413:                                if (*mtod(*m, int *))
                    414:                                        inp->inp_flags |= INP_HDRINCL;
                    415:                                else
                    416:                                        inp->inp_flags &= ~INP_HDRINCL;
                    417:                        }
1.31      mycroft   418:                        if (*m != 0)
                    419:                                (void) m_free(*m);
                    420:                        break;
                    421:
                    422: #ifdef MROUTING
                    423:                case MRT_INIT:
                    424:                case MRT_DONE:
                    425:                case MRT_ADD_VIF:
                    426:                case MRT_DEL_VIF:
                    427:                case MRT_ADD_MFC:
                    428:                case MRT_DEL_MFC:
                    429:                case MRT_ASSERT:
                    430:                        error = ip_mrouter_set(so, optname, m);
                    431:                        break;
                    432: #endif
                    433:
                    434:                default:
                    435:                        error = ip_ctloutput(op, so, level, optname, m);
                    436:                        break;
1.13      mycroft   437:                }
                    438:                break;
1.1       cgd       439:
1.31      mycroft   440:        case PRCO_GETOPT:
                    441:                switch (optname) {
                    442:                case IP_HDRINCL:
1.66      thorpej   443:                        *m = m_get(M_WAIT, MT_SOOPTS);
1.67      matt      444:                        MCLAIM((*m), so->so_mowner);
1.31      mycroft   445:                        (*m)->m_len = sizeof (int);
                    446:                        *mtod(*m, int *) = inp->inp_flags & INP_HDRINCL ? 1 : 0;
                    447:                        break;
                    448:
1.6       hpeyerl   449: #ifdef MROUTING
1.31      mycroft   450:                case MRT_VERSION:
                    451:                case MRT_ASSERT:
                    452:                        error = ip_mrouter_get(so, optname, m);
1.18      mycroft   453:                        break;
1.31      mycroft   454: #endif
                    455:
1.18      mycroft   456:                default:
1.31      mycroft   457:                        error = ip_ctloutput(op, so, level, optname, m);
1.18      mycroft   458:                        break;
                    459:                }
1.31      mycroft   460:                break;
1.1       cgd       461:        }
1.31      mycroft   462:        return (error);
1.1       cgd       463: }
                    464:
1.27      mycroft   465: int
1.29      mycroft   466: rip_bind(inp, nam)
                    467:        struct inpcb *inp;
                    468:        struct mbuf *nam;
                    469: {
                    470:        struct sockaddr_in *addr = mtod(nam, struct sockaddr_in *);
                    471:
                    472:        if (nam->m_len != sizeof(*addr))
                    473:                return (EINVAL);
1.58      matt      474:        if (TAILQ_FIRST(&ifnet) == 0)
1.29      mycroft   475:                return (EADDRNOTAVAIL);
                    476:        if (addr->sin_family != AF_INET &&
                    477:            addr->sin_family != AF_IMPLINK)
                    478:                return (EAFNOSUPPORT);
1.32      mycroft   479:        if (!in_nullhost(addr->sin_addr) &&
1.29      mycroft   480:            ifa_ifwithaddr(sintosa(addr)) == 0)
                    481:                return (EADDRNOTAVAIL);
                    482:        inp->inp_laddr = addr->sin_addr;
                    483:        return (0);
                    484: }
                    485:
                    486: int
1.27      mycroft   487: rip_connect(inp, nam)
                    488:        struct inpcb *inp;
                    489:        struct mbuf *nam;
                    490: {
                    491:        struct sockaddr_in *addr = mtod(nam, struct sockaddr_in *);
                    492:
                    493:        if (nam->m_len != sizeof(*addr))
                    494:                return (EINVAL);
1.58      matt      495:        if (TAILQ_FIRST(&ifnet) == 0)
1.27      mycroft   496:                return (EADDRNOTAVAIL);
                    497:        if (addr->sin_family != AF_INET &&
                    498:            addr->sin_family != AF_IMPLINK)
                    499:                return (EAFNOSUPPORT);
                    500:        inp->inp_faddr = addr->sin_addr;
                    501:        return (0);
                    502: }
                    503:
                    504: void
                    505: rip_disconnect(inp)
                    506:        struct inpcb *inp;
                    507: {
                    508:
1.32      mycroft   509:        inp->inp_faddr = zeroin_addr;
1.27      mycroft   510: }
                    511:
1.13      mycroft   512: u_long rip_sendspace = RIPSNDQ;
                    513: u_long rip_recvspace = RIPRCVQ;
                    514:
1.1       cgd       515: /*ARGSUSED*/
1.9       mycroft   516: int
1.70      fvdl      517: rip_usrreq(so, req, m, nam, control, p)
1.53      augustss  518:        struct socket *so;
1.1       cgd       519:        int req;
1.2       cgd       520:        struct mbuf *m, *nam, *control;
1.70      fvdl      521:        struct proc *p;
1.1       cgd       522: {
1.53      augustss  523:        struct inpcb *inp;
1.27      mycroft   524:        int s;
1.53      augustss  525:        int error = 0;
1.13      mycroft   526: #ifdef MROUTING
1.6       hpeyerl   527:        extern struct socket *ip_mrouter;
                    528: #endif
1.27      mycroft   529:
1.22      pk        530:        if (req == PRU_CONTROL)
                    531:                return (in_control(so, (long)m, (caddr_t)nam,
1.26      mycroft   532:                    (struct ifnet *)control, p));
1.49      thorpej   533:
1.50      thorpej   534:        if (req == PRU_PURGEIF) {
1.56      itojun    535:                in_pcbpurgeif0(&rawcbtable, (struct ifnet *)control);
1.50      thorpej   536:                in_purgeif((struct ifnet *)control);
                    537:                in_pcbpurgeif(&rawcbtable, (struct ifnet *)control);
1.49      thorpej   538:                return (0);
                    539:        }
1.22      pk        540:
1.27      mycroft   541:        s = splsoftnet();
                    542:        inp = sotoinpcb(so);
1.28      mycroft   543: #ifdef DIAGNOSTIC
                    544:        if (req != PRU_SEND && req != PRU_SENDOOB && control)
                    545:                panic("rip_usrreq: unexpected control mbuf");
                    546: #endif
1.27      mycroft   547:        if (inp == 0 && req != PRU_ATTACH) {
1.22      pk        548:                error = EINVAL;
                    549:                goto release;
                    550:        }
                    551:
1.1       cgd       552:        switch (req) {
                    553:
                    554:        case PRU_ATTACH:
1.27      mycroft   555:                if (inp != 0) {
                    556:                        error = EISCONN;
                    557:                        break;
                    558:                }
1.26      mycroft   559:                if (p == 0 || (error = suser(p->p_ucred, &p->p_acflag))) {
1.13      mycroft   560:                        error = EACCES;
                    561:                        break;
                    562:                }
1.27      mycroft   563:                if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
                    564:                        error = soreserve(so, rip_sendspace, rip_recvspace);
                    565:                        if (error)
                    566:                                break;
                    567:                }
                    568:                error = in_pcballoc(so, &rawcbtable);
                    569:                if (error)
1.13      mycroft   570:                        break;
1.27      mycroft   571:                inp = sotoinpcb(so);
1.17      cgd       572:                inp->inp_ip.ip_p = (long)nam;
1.1       cgd       573:                break;
                    574:
                    575:        case PRU_DETACH:
1.13      mycroft   576: #ifdef MROUTING
1.6       hpeyerl   577:                if (so == ip_mrouter)
                    578:                        ip_mrouter_done();
                    579: #endif
1.13      mycroft   580:                in_pcbdetach(inp);
1.1       cgd       581:                break;
                    582:
                    583:        case PRU_BIND:
1.29      mycroft   584:                error = rip_bind(inp, nam);
1.27      mycroft   585:                break;
                    586:
                    587:        case PRU_LISTEN:
                    588:                error = EOPNOTSUPP;
                    589:                break;
                    590:
                    591:        case PRU_CONNECT:
                    592:                error = rip_connect(inp, nam);
                    593:                if (error)
1.13      mycroft   594:                        break;
1.1       cgd       595:                soisconnected(so);
1.13      mycroft   596:                break;
                    597:
                    598:        case PRU_CONNECT2:
                    599:                error = EOPNOTSUPP;
                    600:                break;
                    601:
1.27      mycroft   602:        case PRU_DISCONNECT:
                    603:                soisdisconnected(so);
                    604:                rip_disconnect(inp);
                    605:                break;
                    606:
1.13      mycroft   607:        /*
                    608:         * Mark the connection as being incapable of further input.
                    609:         */
                    610:        case PRU_SHUTDOWN:
                    611:                socantsendmore(so);
                    612:                break;
                    613:
1.27      mycroft   614:        case PRU_RCVD:
                    615:                error = EOPNOTSUPP;
                    616:                break;
                    617:
1.13      mycroft   618:        /*
                    619:         * Ship a packet out.  The appropriate raw output
                    620:         * routine handles any massaging necessary.
                    621:         */
                    622:        case PRU_SEND:
1.28      mycroft   623:                if (control && control->m_len) {
                    624:                        m_freem(control);
                    625:                        m_freem(m);
                    626:                        error = EINVAL;
                    627:                        break;
                    628:                }
                    629:        {
1.27      mycroft   630:                if (nam) {
                    631:                        if ((so->so_state & SS_ISCONNECTED) != 0) {
1.13      mycroft   632:                                error = EISCONN;
1.28      mycroft   633:                                goto die;
1.13      mycroft   634:                        }
1.27      mycroft   635:                        error = rip_connect(inp, nam);
                    636:                        if (error) {
1.28      mycroft   637:                        die:
1.27      mycroft   638:                                m_freem(m);
                    639:                                break;
                    640:                        }
1.13      mycroft   641:                } else {
1.27      mycroft   642:                        if ((so->so_state & SS_ISCONNECTED) == 0) {
1.13      mycroft   643:                                error = ENOTCONN;
1.28      mycroft   644:                                goto die;
1.13      mycroft   645:                        }
                    646:                }
1.27      mycroft   647:                error = rip_output(m, inp);
                    648:                if (nam)
                    649:                        rip_disconnect(inp);
1.28      mycroft   650:        }
1.13      mycroft   651:                break;
                    652:
                    653:        case PRU_SENSE:
                    654:                /*
                    655:                 * stat: don't bother with a blocksize.
                    656:                 */
1.27      mycroft   657:                splx(s);
1.1       cgd       658:                return (0);
1.13      mycroft   659:
                    660:        case PRU_RCVOOB:
1.27      mycroft   661:                error = EOPNOTSUPP;
                    662:                break;
                    663:
1.13      mycroft   664:        case PRU_SENDOOB:
1.28      mycroft   665:                m_freem(control);
1.27      mycroft   666:                m_freem(m);
1.13      mycroft   667:                error = EOPNOTSUPP;
                    668:                break;
                    669:
                    670:        case PRU_SOCKADDR:
                    671:                in_setsockaddr(inp, nam);
                    672:                break;
                    673:
                    674:        case PRU_PEERADDR:
                    675:                in_setpeeraddr(inp, nam);
                    676:                break;
                    677:
                    678:        default:
                    679:                panic("rip_usrreq");
1.1       cgd       680:        }
1.27      mycroft   681:
1.22      pk        682: release:
1.27      mycroft   683:        splx(s);
1.1       cgd       684:        return (error);
                    685: }

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