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Annotation of src/sys/netinet/raw_ip.c, Revision 1.107.2.1

1.107.2.1! yamt        1: /*     $NetBSD: raw_ip.c,v 1.107 2008/04/24 11:38:38 ad 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>
1.107.2.1! yamt       64: __KERNEL_RCSID(0, "$NetBSD: raw_ip.c,v 1.107 2008/04/24 11:38:38 ad Exp $");
1.40      scottr     65:
1.78      jonathan   66: #include "opt_inet.h"
1.107.2.1! yamt       67: #include "opt_compat_netbsd.h"
1.45      thorpej    68: #include "opt_ipsec.h"
1.40      scottr     69: #include "opt_mrouting.h"
1.1       cgd        70:
1.7       mycroft    71: #include <sys/param.h>
1.84      atatat     72: #include <sys/sysctl.h>
1.7       mycroft    73: #include <sys/malloc.h>
                     74: #include <sys/mbuf.h>
                     75: #include <sys/socket.h>
                     76: #include <sys/protosw.h>
                     77: #include <sys/socketvar.h>
                     78: #include <sys/errno.h>
1.13      mycroft    79: #include <sys/systm.h>
1.26      mycroft    80: #include <sys/proc.h>
1.89      elad       81: #include <sys/kauth.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>
1.105     thorpej    90: #include <netinet/ip_private.h>
1.13      mycroft    91: #include <netinet/ip_mroute.h>
1.44      darrenr    92: #include <netinet/ip_icmp.h>
1.7       mycroft    93: #include <netinet/in_pcb.h>
1.87      yamt       94: #include <netinet/in_proto.h>
1.24      christos   95: #include <netinet/in_var.h>
                     96:
                     97: #include <machine/stdarg.h>
1.13      mycroft    98:
1.43      itojun     99: #ifdef IPSEC
                    100: #include <netinet6/ipsec.h>
1.106     thorpej   101: #include <netinet6/ipsec_private.h>
                    102: #endif /* IPSEC */
1.43      itojun    103:
1.72      jonathan  104: #ifdef FAST_IPSEC
                    105: #include <netipsec/ipsec.h>
1.106     thorpej   106: #include <netipsec/ipsec_var.h>
                    107: #include <netipsec/ipsec_private.h>
                    108: #endif /* FAST_IPSEC */
1.72      jonathan  109:
1.107.2.1! yamt      110: #ifdef COMPAT_50
        !           111: #include <compat/sys/socket.h>
        !           112: #endif
        !           113:
1.20      mycroft   114: struct inpcbtable rawcbtable;
1.30      pk        115:
1.82      perry     116: int     rip_pcbnotify(struct inpcbtable *, struct in_addr,
                    117:     struct in_addr, int, int, void (*)(struct inpcb *, int));
                    118: int     rip_bind(struct inpcb *, struct mbuf *);
                    119: int     rip_connect(struct inpcb *, struct mbuf *);
                    120: void    rip_disconnect(struct inpcb *);
1.13      mycroft   121:
                    122: /*
                    123:  * Nominal space allocated to a raw ip socket.
                    124:  */
                    125: #define        RIPSNDQ         8192
                    126: #define        RIPRCVQ         8192
1.1       cgd       127:
                    128: /*
                    129:  * Raw interface to IP protocol.
                    130:  */
1.13      mycroft   131:
                    132: /*
                    133:  * Initialize raw connection block q.
                    134:  */
                    135: void
1.83      perry     136: rip_init(void)
1.13      mycroft   137: {
                    138:
1.33      mycroft   139:        in_pcbinit(&rawcbtable, 1, 1);
1.13      mycroft   140: }
                    141:
1.100     dyoung    142: static void
                    143: rip_sbappendaddr(struct inpcb *last, struct ip *ip, const struct sockaddr *sa,
                    144:     int hlen, struct mbuf *opts, struct mbuf *n)
                    145: {
                    146:        if (last->inp_flags & INP_NOHEADER)
                    147:                m_adj(n, hlen);
1.107.2.1! yamt      148:        if (last->inp_flags & INP_CONTROLOPTS
        !           149: #ifdef SO_OTIMESTAMP
        !           150:            || last->inp_socket->so_options & SO_OTIMESTAMP
        !           151: #endif
        !           152:            || last->inp_socket->so_options & SO_TIMESTAMP)
1.100     dyoung    153:                ip_savecontrol(last, &opts, ip, n);
                    154:        if (sbappendaddr(&last->inp_socket->so_rcv, sa, n, opts) == 0) {
                    155:                /* should notify about lost packet */
                    156:                m_freem(n);
                    157:                if (opts)
                    158:                        m_freem(opts);
                    159:        } else
                    160:                sorwakeup(last->inp_socket);
                    161: }
                    162:
1.1       cgd       163: /*
                    164:  * Setup generic address and protocol structures
                    165:  * for raw_input routine, then pass them along with
                    166:  * mbuf chain.
                    167:  */
1.9       mycroft   168: void
1.24      christos  169: rip_input(struct mbuf *m, ...)
1.1       cgd       170: {
1.100     dyoung    171:        int hlen, proto;
1.53      augustss  172:        struct ip *ip = mtod(m, struct ip *);
1.75      itojun    173:        struct inpcb_hdr *inph;
1.53      augustss  174:        struct inpcb *inp;
1.97      dyoung    175:        struct inpcb *last = NULL;
                    176:        struct mbuf *n, *opts = NULL;
1.32      mycroft   177:        struct sockaddr_in ripsrc;
1.43      itojun    178:        va_list ap;
                    179:
                    180:        va_start(ap, m);
1.64      simonb    181:        (void)va_arg(ap, int);          /* ignore value, advance ap */
1.43      itojun    182:        proto = va_arg(ap, int);
                    183:        va_end(ap);
1.1       cgd       184:
1.97      dyoung    185:        sockaddr_in_init(&ripsrc, &ip->ip_src, 0);
1.42      thorpej   186:
                    187:        /*
                    188:         * XXX Compatibility: programs using raw IP expect ip_len
1.62      itojun    189:         * XXX to have the header length subtracted, and in host order.
                    190:         * XXX ip_off is also expected to be host order.
1.42      thorpej   191:         */
1.100     dyoung    192:        hlen = ip->ip_hl << 2;
                    193:        ip->ip_len = ntohs(ip->ip_len) - hlen;
1.62      itojun    194:        NTOHS(ip->ip_off);
1.32      mycroft   195:
1.75      itojun    196:        CIRCLEQ_FOREACH(inph, &rawcbtable.inpt_queue, inph_queue) {
                    197:                inp = (struct inpcb *)inph;
                    198:                if (inp->inp_af != AF_INET)
                    199:                        continue;
1.43      itojun    200:                if (inp->inp_ip.ip_p && inp->inp_ip.ip_p != proto)
1.13      mycroft   201:                        continue;
1.32      mycroft   202:                if (!in_nullhost(inp->inp_laddr) &&
                    203:                    !in_hosteq(inp->inp_laddr, ip->ip_dst))
1.13      mycroft   204:                        continue;
1.32      mycroft   205:                if (!in_nullhost(inp->inp_faddr) &&
                    206:                    !in_hosteq(inp->inp_faddr, ip->ip_src))
1.13      mycroft   207:                        continue;
1.97      dyoung    208:                if (last == NULL)
                    209:                        ;
1.72      jonathan  210: #if defined(IPSEC) || defined(FAST_IPSEC)
1.97      dyoung    211:                /* check AH/ESP integrity. */
                    212:                else if (ipsec4_in_reject_so(m, last->inp_socket)) {
1.106     thorpej   213:                        IPSEC_STATINC(IPSEC_STAT_IN_POLVIO);
1.97      dyoung    214:                        /* do not inject data to pcb */
                    215:                }
                    216: #endif /*IPSEC*/
1.99      dyoung    217:                else if ((n = m_copypacket(m, M_DONTWAIT)) != NULL) {
1.100     dyoung    218:                        rip_sbappendaddr(last, ip, sintosa(&ripsrc), hlen, opts,
                    219:                            n);
1.97      dyoung    220:                        opts = NULL;
1.13      mycroft   221:                }
1.36      thorpej   222:                last = inp;
1.13      mycroft   223:        }
1.72      jonathan  224: #if defined(IPSEC) || defined(FAST_IPSEC)
1.55      itojun    225:        /* check AH/ESP integrity. */
1.97      dyoung    226:        if (last != NULL && ipsec4_in_reject_so(m, last->inp_socket)) {
1.55      itojun    227:                m_freem(m);
1.106     thorpej   228:                IPSEC_STATINC(IPSEC_STAT_IN_POLVIO);
1.105     thorpej   229:                IP_STATDEC(IP_STAT_DELIVERED);
1.55      itojun    230:                /* do not inject data to pcb */
                    231:        } else
                    232: #endif /*IPSEC*/
1.100     dyoung    233:        if (last != NULL)
                    234:                rip_sbappendaddr(last, ip, sintosa(&ripsrc), hlen, opts, m);
                    235:        else if (inetsw[ip_protox[ip->ip_p]].pr_input == rip_input) {
1.105     thorpej   236:                uint64_t *ips;
                    237:
1.97      dyoung    238:                icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PROTOCOL,
                    239:                    0, 0);
1.105     thorpej   240:                ips = IP_STAT_GETREF();
                    241:                ips[IP_STAT_NOPROTO]++;
                    242:                ips[IP_STAT_DELIVERED]--;
                    243:                IP_STAT_PUTREF();
1.97      dyoung    244:        } else
                    245:                m_freem(m);
1.43      itojun    246:        return;
1.60      itojun    247: }
                    248:
                    249: int
1.83      perry     250: rip_pcbnotify(struct inpcbtable *table,
                    251:     struct in_addr faddr, struct in_addr laddr, int proto, int errno,
                    252:     void (*notify)(struct inpcb *, int))
1.60      itojun    253: {
                    254:        struct inpcb *inp, *ninp;
                    255:        int nmatch;
                    256:
                    257:        nmatch = 0;
1.75      itojun    258:        for (inp = (struct inpcb *)CIRCLEQ_FIRST(&table->inpt_queue);
1.60      itojun    259:            inp != (struct inpcb *)&table->inpt_queue;
                    260:            inp = ninp) {
1.75      itojun    261:                ninp = (struct inpcb *)inp->inp_queue.cqe_next;
                    262:                if (inp->inp_af != AF_INET)
                    263:                        continue;
1.60      itojun    264:                if (inp->inp_ip.ip_p && inp->inp_ip.ip_p != proto)
                    265:                        continue;
                    266:                if (in_hosteq(inp->inp_faddr, faddr) &&
                    267:                    in_hosteq(inp->inp_laddr, laddr)) {
                    268:                        (*notify)(inp, errno);
                    269:                        nmatch++;
                    270:                }
                    271:        }
                    272:
                    273:        return nmatch;
                    274: }
                    275:
                    276: void *
1.95      dyoung    277: rip_ctlinput(int cmd, const struct sockaddr *sa, void *v)
1.60      itojun    278: {
                    279:        struct ip *ip = v;
1.82      perry     280:        void (*notify)(struct inpcb *, int) = in_rtchange;
1.60      itojun    281:        int errno;
                    282:
                    283:        if (sa->sa_family != AF_INET ||
                    284:            sa->sa_len != sizeof(struct sockaddr_in))
                    285:                return NULL;
                    286:        if ((unsigned)cmd >= PRC_NCMDS)
                    287:                return NULL;
                    288:        errno = inetctlerrmap[cmd];
                    289:        if (PRC_IS_REDIRECT(cmd))
                    290:                notify = in_rtchange, ip = 0;
                    291:        else if (cmd == PRC_HOSTDEAD)
                    292:                ip = 0;
                    293:        else if (errno == 0)
                    294:                return NULL;
                    295:        if (ip) {
1.95      dyoung    296:                rip_pcbnotify(&rawcbtable, satocsin(sa)->sin_addr,
1.60      itojun    297:                    ip->ip_src, ip->ip_p, errno, notify);
                    298:
                    299:                /* XXX mapped address case */
                    300:        } else
1.95      dyoung    301:                in_pcbnotifyall(&rawcbtable, satocsin(sa)->sin_addr, errno,
1.60      itojun    302:                    notify);
                    303:        return NULL;
1.1       cgd       304: }
                    305:
                    306: /*
                    307:  * Generate IP header and pass packet to ip_output.
                    308:  * Tack on options user may have setup with control call.
                    309:  */
1.9       mycroft   310: int
1.24      christos  311: rip_output(struct mbuf *m, ...)
                    312: {
1.53      augustss  313:        struct inpcb *inp;
                    314:        struct ip *ip;
1.10      mycroft   315:        struct mbuf *opts;
1.24      christos  316:        int flags;
                    317:        va_list ap;
                    318:
                    319:        va_start(ap, m);
1.27      mycroft   320:        inp = va_arg(ap, struct inpcb *);
1.24      christos  321:        va_end(ap);
                    322:
1.27      mycroft   323:        flags =
1.37      matt      324:            (inp->inp_socket->so_options & SO_DONTROUTE) | IP_ALLOWBROADCAST
                    325:            | IP_RETURNMTU;
1.1       cgd       326:
                    327:        /*
                    328:         * If the user handed us a complete IP packet, use it.
                    329:         * Otherwise, allocate an mbuf for a header and fill it in.
                    330:         */
1.13      mycroft   331:        if ((inp->inp_flags & INP_HDRINCL) == 0) {
1.35      thorpej   332:                if ((m->m_pkthdr.len + sizeof(struct ip)) > IP_MAXPACKET) {
                    333:                        m_freem(m);
                    334:                        return (EMSGSIZE);
                    335:                }
1.68      itojun    336:                M_PREPEND(m, sizeof(struct ip), M_DONTWAIT);
                    337:                if (!m)
                    338:                        return (ENOBUFS);
1.1       cgd       339:                ip = mtod(m, struct ip *);
                    340:                ip->ip_tos = 0;
1.62      itojun    341:                ip->ip_off = htons(0);
1.13      mycroft   342:                ip->ip_p = inp->inp_ip.ip_p;
1.62      itojun    343:                ip->ip_len = htons(m->m_pkthdr.len);
1.13      mycroft   344:                ip->ip_src = inp->inp_laddr;
1.27      mycroft   345:                ip->ip_dst = inp->inp_faddr;
1.1       cgd       346:                ip->ip_ttl = MAXTTL;
1.13      mycroft   347:                opts = inp->inp_options;
                    348:        } else {
1.35      thorpej   349:                if (m->m_pkthdr.len > IP_MAXPACKET) {
                    350:                        m_freem(m);
                    351:                        return (EMSGSIZE);
                    352:                }
1.13      mycroft   353:                ip = mtod(m, struct ip *);
1.65      thorpej   354:
                    355:                /*
                    356:                 * If the mbuf is read-only, we need to allocate
                    357:                 * a new mbuf for the header, since we need to
                    358:                 * modify the header.
                    359:                 */
                    360:                if (M_READONLY(m)) {
                    361:                        int hlen = ip->ip_hl << 2;
                    362:
                    363:                        m = m_copyup(m, hlen, (max_linkhdr + 3) & ~3);
                    364:                        if (m == NULL)
                    365:                                return (ENOMEM);        /* XXX */
                    366:                        ip = mtod(m, struct ip *);
                    367:                }
                    368:
1.62      itojun    369:                /* XXX userland passes ip_len and ip_off in host order */
1.38      mycroft   370:                if (m->m_pkthdr.len != ip->ip_len) {
                    371:                        m_freem(m);
                    372:                        return (EINVAL);
                    373:                }
1.62      itojun    374:                HTONS(ip->ip_len);
                    375:                HTONS(ip->ip_off);
1.103     matt      376:                if (ip->ip_id != 0 || m->m_pkthdr.len < IP_MINFRAGSIZE)
                    377:                        flags |= IP_NOIPNEWID;
1.13      mycroft   378:                opts = NULL;
                    379:                /* XXX prevent ip_output from overwriting header fields */
                    380:                flags |= IP_RAWOUTPUT;
1.105     thorpej   381:                IP_STATINC(IP_STAT_RAWOUT);
1.1       cgd       382:        }
1.62      itojun    383:        return (ip_output(m, opts, &inp->inp_route, flags, inp->inp_moptions,
1.73      itojun    384:             inp->inp_socket, &inp->inp_errormtu));
1.1       cgd       385: }
                    386:
                    387: /*
                    388:  * Raw IP socket option processing.
                    389:  */
1.9       mycroft   390: int
1.107.2.1! yamt      391: rip_ctloutput(int op, struct socket *so, struct sockopt *sopt)
1.1       cgd       392: {
1.53      augustss  393:        struct inpcb *inp = sotoinpcb(so);
1.31      mycroft   394:        int error = 0;
1.107.2.1! yamt      395:        int optval;
1.1       cgd       396:
1.107.2.1! yamt      397:        if (sopt->sopt_level == SOL_SOCKET && sopt->sopt_name == SO_NOHEADER) {
1.100     dyoung    398:                if (op == PRCO_GETOPT) {
1.107.2.1! yamt      399:                        optval = (inp->inp_flags & INP_NOHEADER) ? 1 : 0;
        !           400:                        error = sockopt_set(sopt, &optval, sizeof(optval));
        !           401:                } else if (op == PRCO_SETOPT) {
        !           402:                        error = sockopt_getint(sopt, &optval);
        !           403:                        if (error)
        !           404:                                goto out;
        !           405:                        if (optval) {
        !           406:                                inp->inp_flags &= ~INP_HDRINCL;
        !           407:                                inp->inp_flags |= INP_NOHEADER;
        !           408:                        } else
        !           409:                                inp->inp_flags &= ~INP_NOHEADER;
        !           410:                }
        !           411:                goto out;
        !           412:        } else if (sopt->sopt_level != IPPROTO_IP)
        !           413:                return ip_ctloutput(op, so, sopt);
1.100     dyoung    414:
                    415:        switch (op) {
1.31      mycroft   416:
                    417:        case PRCO_SETOPT:
1.107.2.1! yamt      418:                switch (sopt->sopt_name) {
1.31      mycroft   419:                case IP_HDRINCL:
1.107.2.1! yamt      420:                        error = sockopt_getint(sopt, &optval);
        !           421:                        if (error)
        !           422:                                break;
        !           423:                        if (optval)
1.100     dyoung    424:                                inp->inp_flags |= INP_HDRINCL;
                    425:                        else
                    426:                                inp->inp_flags &= ~INP_HDRINCL;
1.107.2.1! yamt      427:                        break;
1.31      mycroft   428:
                    429: #ifdef MROUTING
                    430:                case MRT_INIT:
                    431:                case MRT_DONE:
                    432:                case MRT_ADD_VIF:
                    433:                case MRT_DEL_VIF:
                    434:                case MRT_ADD_MFC:
                    435:                case MRT_DEL_MFC:
                    436:                case MRT_ASSERT:
1.81      manu      437:                case MRT_API_CONFIG:
                    438:                case MRT_ADD_BW_UPCALL:
                    439:                case MRT_DEL_BW_UPCALL:
1.107.2.1! yamt      440:                        error = ip_mrouter_set(so, sopt);
1.31      mycroft   441:                        break;
                    442: #endif
                    443:
                    444:                default:
1.107.2.1! yamt      445:                        error = ip_ctloutput(op, so, sopt);
1.31      mycroft   446:                        break;
1.13      mycroft   447:                }
                    448:                break;
1.1       cgd       449:
1.31      mycroft   450:        case PRCO_GETOPT:
1.107.2.1! yamt      451:                switch (sopt->sopt_name) {
1.31      mycroft   452:                case IP_HDRINCL:
1.107.2.1! yamt      453:                        optval = inp->inp_flags & INP_HDRINCL;
        !           454:                        error = sockopt_set(sopt, &optval, sizeof(optval));
1.31      mycroft   455:                        break;
                    456:
1.6       hpeyerl   457: #ifdef MROUTING
1.31      mycroft   458:                case MRT_VERSION:
                    459:                case MRT_ASSERT:
1.81      manu      460:                case MRT_API_SUPPORT:
                    461:                case MRT_API_CONFIG:
1.107.2.1! yamt      462:                        error = ip_mrouter_get(so, sopt);
1.18      mycroft   463:                        break;
1.31      mycroft   464: #endif
                    465:
1.18      mycroft   466:                default:
1.107.2.1! yamt      467:                        error = ip_ctloutput(op, so, sopt);
1.18      mycroft   468:                        break;
                    469:                }
1.31      mycroft   470:                break;
1.1       cgd       471:        }
1.107.2.1! yamt      472:  out:
1.100     dyoung    473:        return error;
1.1       cgd       474: }
                    475:
1.27      mycroft   476: int
1.83      perry     477: rip_bind(struct inpcb *inp, struct mbuf *nam)
1.29      mycroft   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)
1.29      mycroft   484:                return (EADDRNOTAVAIL);
                    485:        if (addr->sin_family != AF_INET &&
                    486:            addr->sin_family != AF_IMPLINK)
                    487:                return (EAFNOSUPPORT);
1.32      mycroft   488:        if (!in_nullhost(addr->sin_addr) &&
1.29      mycroft   489:            ifa_ifwithaddr(sintosa(addr)) == 0)
                    490:                return (EADDRNOTAVAIL);
                    491:        inp->inp_laddr = addr->sin_addr;
                    492:        return (0);
                    493: }
                    494:
                    495: int
1.83      perry     496: rip_connect(struct inpcb *inp, struct mbuf *nam)
1.27      mycroft   497: {
                    498:        struct sockaddr_in *addr = mtod(nam, struct sockaddr_in *);
                    499:
                    500:        if (nam->m_len != sizeof(*addr))
                    501:                return (EINVAL);
1.58      matt      502:        if (TAILQ_FIRST(&ifnet) == 0)
1.27      mycroft   503:                return (EADDRNOTAVAIL);
                    504:        if (addr->sin_family != AF_INET &&
                    505:            addr->sin_family != AF_IMPLINK)
                    506:                return (EAFNOSUPPORT);
                    507:        inp->inp_faddr = addr->sin_addr;
                    508:        return (0);
                    509: }
                    510:
                    511: void
1.83      perry     512: rip_disconnect(struct inpcb *inp)
1.27      mycroft   513: {
                    514:
1.32      mycroft   515:        inp->inp_faddr = zeroin_addr;
1.27      mycroft   516: }
                    517:
1.13      mycroft   518: u_long rip_sendspace = RIPSNDQ;
                    519: u_long rip_recvspace = RIPRCVQ;
                    520:
1.1       cgd       521: /*ARGSUSED*/
1.9       mycroft   522: int
1.83      perry     523: rip_usrreq(struct socket *so, int req,
1.88      christos  524:     struct mbuf *m, struct mbuf *nam, struct mbuf *control, struct lwp *l)
1.1       cgd       525: {
1.53      augustss  526:        struct inpcb *inp;
1.27      mycroft   527:        int s;
1.53      augustss  528:        int error = 0;
1.13      mycroft   529: #ifdef MROUTING
1.6       hpeyerl   530:        extern struct socket *ip_mrouter;
                    531: #endif
1.27      mycroft   532:
1.22      pk        533:        if (req == PRU_CONTROL)
1.96      christos  534:                return (in_control(so, (long)m, (void *)nam,
1.90      ad        535:                    (struct ifnet *)control, l));
1.49      thorpej   536:
1.93      tls       537:        s = splsoftnet();
                    538:
1.50      thorpej   539:        if (req == PRU_PURGEIF) {
1.107     ad        540:                mutex_enter(softnet_lock);
1.56      itojun    541:                in_pcbpurgeif0(&rawcbtable, (struct ifnet *)control);
1.50      thorpej   542:                in_purgeif((struct ifnet *)control);
                    543:                in_pcbpurgeif(&rawcbtable, (struct ifnet *)control);
1.107     ad        544:                mutex_exit(softnet_lock);
1.93      tls       545:                splx(s);
1.49      thorpej   546:                return (0);
                    547:        }
1.22      pk        548:
1.27      mycroft   549:        inp = sotoinpcb(so);
1.28      mycroft   550: #ifdef DIAGNOSTIC
                    551:        if (req != PRU_SEND && req != PRU_SENDOOB && control)
                    552:                panic("rip_usrreq: unexpected control mbuf");
                    553: #endif
1.27      mycroft   554:        if (inp == 0 && req != PRU_ATTACH) {
1.22      pk        555:                error = EINVAL;
                    556:                goto release;
                    557:        }
                    558:
1.1       cgd       559:        switch (req) {
                    560:
                    561:        case PRU_ATTACH:
1.107     ad        562:                sosetlock(so);
1.27      mycroft   563:                if (inp != 0) {
                    564:                        error = EISCONN;
                    565:                        break;
                    566:                }
1.94      elad      567:
                    568:                if (l == NULL) {
1.13      mycroft   569:                        error = EACCES;
                    570:                        break;
                    571:                }
1.94      elad      572:
                    573:                /* XXX: raw socket permissions are checked in socreate() */
                    574:
1.27      mycroft   575:                if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
                    576:                        error = soreserve(so, rip_sendspace, rip_recvspace);
                    577:                        if (error)
                    578:                                break;
                    579:                }
                    580:                error = in_pcballoc(so, &rawcbtable);
                    581:                if (error)
1.13      mycroft   582:                        break;
1.27      mycroft   583:                inp = sotoinpcb(so);
1.17      cgd       584:                inp->inp_ip.ip_p = (long)nam;
1.1       cgd       585:                break;
                    586:
                    587:        case PRU_DETACH:
1.13      mycroft   588: #ifdef MROUTING
1.6       hpeyerl   589:                if (so == ip_mrouter)
                    590:                        ip_mrouter_done();
                    591: #endif
1.13      mycroft   592:                in_pcbdetach(inp);
1.1       cgd       593:                break;
                    594:
                    595:        case PRU_BIND:
1.29      mycroft   596:                error = rip_bind(inp, nam);
1.27      mycroft   597:                break;
                    598:
                    599:        case PRU_LISTEN:
                    600:                error = EOPNOTSUPP;
                    601:                break;
                    602:
                    603:        case PRU_CONNECT:
                    604:                error = rip_connect(inp, nam);
                    605:                if (error)
1.13      mycroft   606:                        break;
1.1       cgd       607:                soisconnected(so);
1.13      mycroft   608:                break;
                    609:
                    610:        case PRU_CONNECT2:
                    611:                error = EOPNOTSUPP;
                    612:                break;
                    613:
1.27      mycroft   614:        case PRU_DISCONNECT:
                    615:                soisdisconnected(so);
                    616:                rip_disconnect(inp);
                    617:                break;
                    618:
1.13      mycroft   619:        /*
                    620:         * Mark the connection as being incapable of further input.
                    621:         */
                    622:        case PRU_SHUTDOWN:
                    623:                socantsendmore(so);
                    624:                break;
                    625:
1.27      mycroft   626:        case PRU_RCVD:
                    627:                error = EOPNOTSUPP;
                    628:                break;
                    629:
1.13      mycroft   630:        /*
                    631:         * Ship a packet out.  The appropriate raw output
                    632:         * routine handles any massaging necessary.
                    633:         */
                    634:        case PRU_SEND:
1.28      mycroft   635:                if (control && control->m_len) {
                    636:                        m_freem(control);
                    637:                        m_freem(m);
                    638:                        error = EINVAL;
                    639:                        break;
                    640:                }
                    641:        {
1.27      mycroft   642:                if (nam) {
                    643:                        if ((so->so_state & SS_ISCONNECTED) != 0) {
1.13      mycroft   644:                                error = EISCONN;
1.28      mycroft   645:                                goto die;
1.13      mycroft   646:                        }
1.27      mycroft   647:                        error = rip_connect(inp, nam);
                    648:                        if (error) {
1.28      mycroft   649:                        die:
1.27      mycroft   650:                                m_freem(m);
                    651:                                break;
                    652:                        }
1.13      mycroft   653:                } else {
1.27      mycroft   654:                        if ((so->so_state & SS_ISCONNECTED) == 0) {
1.13      mycroft   655:                                error = ENOTCONN;
1.28      mycroft   656:                                goto die;
1.13      mycroft   657:                        }
                    658:                }
1.27      mycroft   659:                error = rip_output(m, inp);
                    660:                if (nam)
                    661:                        rip_disconnect(inp);
1.28      mycroft   662:        }
1.13      mycroft   663:                break;
                    664:
                    665:        case PRU_SENSE:
                    666:                /*
                    667:                 * stat: don't bother with a blocksize.
                    668:                 */
1.27      mycroft   669:                splx(s);
1.1       cgd       670:                return (0);
1.13      mycroft   671:
                    672:        case PRU_RCVOOB:
1.27      mycroft   673:                error = EOPNOTSUPP;
                    674:                break;
                    675:
1.13      mycroft   676:        case PRU_SENDOOB:
1.28      mycroft   677:                m_freem(control);
1.27      mycroft   678:                m_freem(m);
1.13      mycroft   679:                error = EOPNOTSUPP;
                    680:                break;
                    681:
                    682:        case PRU_SOCKADDR:
                    683:                in_setsockaddr(inp, nam);
                    684:                break;
                    685:
                    686:        case PRU_PEERADDR:
                    687:                in_setpeeraddr(inp, nam);
                    688:                break;
                    689:
                    690:        default:
                    691:                panic("rip_usrreq");
1.1       cgd       692:        }
1.27      mycroft   693:
1.22      pk        694: release:
1.27      mycroft   695:        splx(s);
1.1       cgd       696:        return (error);
                    697: }
1.84      atatat    698:
                    699: SYSCTL_SETUP(sysctl_net_inet_raw_setup, "sysctl net.inet.raw subtree setup")
                    700: {
                    701:
                    702:        sysctl_createv(clog, 0, NULL, NULL,
                    703:                       CTLFLAG_PERMANENT,
                    704:                       CTLTYPE_NODE, "net", NULL,
                    705:                       NULL, 0, NULL, 0,
                    706:                       CTL_NET, CTL_EOL);
                    707:        sysctl_createv(clog, 0, NULL, NULL,
                    708:                       CTLFLAG_PERMANENT,
                    709:                       CTLTYPE_NODE, "inet", NULL,
                    710:                       NULL, 0, NULL, 0,
                    711:                       CTL_NET, PF_INET, CTL_EOL);
                    712:        sysctl_createv(clog, 0, NULL, NULL,
                    713:                       CTLFLAG_PERMANENT,
                    714:                       CTLTYPE_NODE, "raw",
                    715:                       SYSCTL_DESCR("Raw IPv4 settings"),
                    716:                       NULL, 0, NULL, 0,
                    717:                       CTL_NET, PF_INET, IPPROTO_RAW, CTL_EOL);
                    718:
                    719:        sysctl_createv(clog, 0, NULL, NULL,
                    720:                       CTLFLAG_PERMANENT,
1.86      atatat    721:                       CTLTYPE_STRUCT, "pcblist",
1.84      atatat    722:                       SYSCTL_DESCR("Raw IPv4 control block list"),
                    723:                       sysctl_inpcblist, 0, &rawcbtable, 0,
                    724:                       CTL_NET, PF_INET, IPPROTO_RAW,
                    725:                       CTL_CREATE, CTL_EOL);
                    726: }

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