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Annotation of src/sys/netinet/raw_ip.c, Revision 1.112.6.1

1.112.6.1! mrg         1: /*     $NetBSD: raw_ip.c,v 1.113 2011/12/19 11:59:57 drochner 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>
1.112.6.1! mrg        64: __KERNEL_RCSID(0, "$NetBSD: raw_ip.c,v 1.113 2011/12/19 11:59:57 drochner Exp $");
1.40      scottr     65:
1.78      jonathan   66: #include "opt_inet.h"
1.109     christos   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:
1.112.6.1! mrg        97: #ifdef KAME_IPSEC
1.43      itojun     98: #include <netinet6/ipsec.h>
1.106     thorpej    99: #include <netinet6/ipsec_private.h>
1.112.6.1! mrg       100: #endif /* KAME_IPSEC */
1.43      itojun    101:
1.72      jonathan  102: #ifdef FAST_IPSEC
                    103: #include <netipsec/ipsec.h>
1.106     thorpej   104: #include <netipsec/ipsec_var.h>
                    105: #include <netipsec/ipsec_private.h>
                    106: #endif /* FAST_IPSEC */
1.72      jonathan  107:
1.109     christos  108: #ifdef COMPAT_50
                    109: #include <compat/sys/socket.h>
                    110: #endif
                    111:
1.20      mycroft   112: struct inpcbtable rawcbtable;
1.30      pk        113:
1.82      perry     114: int     rip_pcbnotify(struct inpcbtable *, struct in_addr,
                    115:     struct in_addr, int, int, void (*)(struct inpcb *, int));
                    116: int     rip_bind(struct inpcb *, struct mbuf *);
                    117: int     rip_connect(struct inpcb *, struct mbuf *);
                    118: void    rip_disconnect(struct inpcb *);
1.13      mycroft   119:
1.110     pooka     120: static void sysctl_net_inet_raw_setup(struct sysctllog **);
                    121:
1.13      mycroft   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:
1.110     pooka     139:        sysctl_net_inet_raw_setup(NULL);
1.33      mycroft   140:        in_pcbinit(&rawcbtable, 1, 1);
1.13      mycroft   141: }
                    142:
1.100     dyoung    143: static void
                    144: rip_sbappendaddr(struct inpcb *last, struct ip *ip, const struct sockaddr *sa,
                    145:     int hlen, struct mbuf *opts, struct mbuf *n)
                    146: {
                    147:        if (last->inp_flags & INP_NOHEADER)
                    148:                m_adj(n, hlen);
1.109     christos  149:        if (last->inp_flags & INP_CONTROLOPTS
                    150: #ifdef SO_OTIMESTAMP
                    151:            || last->inp_socket->so_options & SO_OTIMESTAMP
                    152: #endif
                    153:            || last->inp_socket->so_options & SO_TIMESTAMP)
1.100     dyoung    154:                ip_savecontrol(last, &opts, ip, n);
                    155:        if (sbappendaddr(&last->inp_socket->so_rcv, sa, n, opts) == 0) {
                    156:                /* should notify about lost packet */
                    157:                m_freem(n);
                    158:                if (opts)
                    159:                        m_freem(opts);
                    160:        } else
                    161:                sorwakeup(last->inp_socket);
                    162: }
                    163:
1.1       cgd       164: /*
                    165:  * Setup generic address and protocol structures
                    166:  * for raw_input routine, then pass them along with
                    167:  * mbuf chain.
                    168:  */
1.9       mycroft   169: void
1.24      christos  170: rip_input(struct mbuf *m, ...)
1.1       cgd       171: {
1.100     dyoung    172:        int hlen, proto;
1.53      augustss  173:        struct ip *ip = mtod(m, struct ip *);
1.75      itojun    174:        struct inpcb_hdr *inph;
1.53      augustss  175:        struct inpcb *inp;
1.97      dyoung    176:        struct inpcb *last = NULL;
                    177:        struct mbuf *n, *opts = NULL;
1.32      mycroft   178:        struct sockaddr_in ripsrc;
1.43      itojun    179:        va_list ap;
                    180:
                    181:        va_start(ap, m);
1.64      simonb    182:        (void)va_arg(ap, int);          /* ignore value, advance ap */
1.43      itojun    183:        proto = va_arg(ap, int);
                    184:        va_end(ap);
1.1       cgd       185:
1.97      dyoung    186:        sockaddr_in_init(&ripsrc, &ip->ip_src, 0);
1.42      thorpej   187:
                    188:        /*
                    189:         * XXX Compatibility: programs using raw IP expect ip_len
1.62      itojun    190:         * XXX to have the header length subtracted, and in host order.
                    191:         * XXX ip_off is also expected to be host order.
1.42      thorpej   192:         */
1.100     dyoung    193:        hlen = ip->ip_hl << 2;
                    194:        ip->ip_len = ntohs(ip->ip_len) - hlen;
1.62      itojun    195:        NTOHS(ip->ip_off);
1.32      mycroft   196:
1.75      itojun    197:        CIRCLEQ_FOREACH(inph, &rawcbtable.inpt_queue, inph_queue) {
                    198:                inp = (struct inpcb *)inph;
                    199:                if (inp->inp_af != AF_INET)
                    200:                        continue;
1.43      itojun    201:                if (inp->inp_ip.ip_p && inp->inp_ip.ip_p != proto)
1.13      mycroft   202:                        continue;
1.32      mycroft   203:                if (!in_nullhost(inp->inp_laddr) &&
                    204:                    !in_hosteq(inp->inp_laddr, ip->ip_dst))
1.13      mycroft   205:                        continue;
1.32      mycroft   206:                if (!in_nullhost(inp->inp_faddr) &&
                    207:                    !in_hosteq(inp->inp_faddr, ip->ip_src))
1.13      mycroft   208:                        continue;
1.97      dyoung    209:                if (last == NULL)
                    210:                        ;
1.112.6.1! mrg       211: #if defined(KAME_IPSEC) || defined(FAST_IPSEC)
1.97      dyoung    212:                /* check AH/ESP integrity. */
                    213:                else if (ipsec4_in_reject_so(m, last->inp_socket)) {
1.106     thorpej   214:                        IPSEC_STATINC(IPSEC_STAT_IN_POLVIO);
1.97      dyoung    215:                        /* do not inject data to pcb */
                    216:                }
                    217: #endif /*IPSEC*/
1.99      dyoung    218:                else if ((n = m_copypacket(m, M_DONTWAIT)) != NULL) {
1.100     dyoung    219:                        rip_sbappendaddr(last, ip, sintosa(&ripsrc), hlen, opts,
                    220:                            n);
1.97      dyoung    221:                        opts = NULL;
1.13      mycroft   222:                }
1.36      thorpej   223:                last = inp;
1.13      mycroft   224:        }
1.112.6.1! mrg       225: #if defined(KAME_IPSEC) || defined(FAST_IPSEC)
1.55      itojun    226:        /* check AH/ESP integrity. */
1.97      dyoung    227:        if (last != NULL && ipsec4_in_reject_so(m, last->inp_socket)) {
1.55      itojun    228:                m_freem(m);
1.106     thorpej   229:                IPSEC_STATINC(IPSEC_STAT_IN_POLVIO);
1.105     thorpej   230:                IP_STATDEC(IP_STAT_DELIVERED);
1.55      itojun    231:                /* do not inject data to pcb */
                    232:        } else
                    233: #endif /*IPSEC*/
1.100     dyoung    234:        if (last != NULL)
                    235:                rip_sbappendaddr(last, ip, sintosa(&ripsrc), hlen, opts, m);
                    236:        else if (inetsw[ip_protox[ip->ip_p]].pr_input == rip_input) {
1.105     thorpej   237:                uint64_t *ips;
                    238:
1.97      dyoung    239:                icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PROTOCOL,
                    240:                    0, 0);
1.105     thorpej   241:                ips = IP_STAT_GETREF();
                    242:                ips[IP_STAT_NOPROTO]++;
                    243:                ips[IP_STAT_DELIVERED]--;
                    244:                IP_STAT_PUTREF();
1.97      dyoung    245:        } else
                    246:                m_freem(m);
1.43      itojun    247:        return;
1.60      itojun    248: }
                    249:
                    250: int
1.83      perry     251: rip_pcbnotify(struct inpcbtable *table,
                    252:     struct in_addr faddr, struct in_addr laddr, int proto, int errno,
                    253:     void (*notify)(struct inpcb *, int))
1.60      itojun    254: {
                    255:        struct inpcb *inp, *ninp;
                    256:        int nmatch;
                    257:
                    258:        nmatch = 0;
1.75      itojun    259:        for (inp = (struct inpcb *)CIRCLEQ_FIRST(&table->inpt_queue);
1.60      itojun    260:            inp != (struct inpcb *)&table->inpt_queue;
                    261:            inp = ninp) {
1.75      itojun    262:                ninp = (struct inpcb *)inp->inp_queue.cqe_next;
                    263:                if (inp->inp_af != AF_INET)
                    264:                        continue;
1.60      itojun    265:                if (inp->inp_ip.ip_p && inp->inp_ip.ip_p != proto)
                    266:                        continue;
                    267:                if (in_hosteq(inp->inp_faddr, faddr) &&
                    268:                    in_hosteq(inp->inp_laddr, laddr)) {
                    269:                        (*notify)(inp, errno);
                    270:                        nmatch++;
                    271:                }
                    272:        }
                    273:
                    274:        return nmatch;
                    275: }
                    276:
                    277: void *
1.95      dyoung    278: rip_ctlinput(int cmd, const struct sockaddr *sa, void *v)
1.60      itojun    279: {
                    280:        struct ip *ip = v;
1.82      perry     281:        void (*notify)(struct inpcb *, int) = in_rtchange;
1.60      itojun    282:        int errno;
                    283:
                    284:        if (sa->sa_family != AF_INET ||
                    285:            sa->sa_len != sizeof(struct sockaddr_in))
                    286:                return NULL;
                    287:        if ((unsigned)cmd >= PRC_NCMDS)
                    288:                return NULL;
                    289:        errno = inetctlerrmap[cmd];
                    290:        if (PRC_IS_REDIRECT(cmd))
                    291:                notify = in_rtchange, ip = 0;
                    292:        else if (cmd == PRC_HOSTDEAD)
                    293:                ip = 0;
                    294:        else if (errno == 0)
                    295:                return NULL;
                    296:        if (ip) {
1.95      dyoung    297:                rip_pcbnotify(&rawcbtable, satocsin(sa)->sin_addr,
1.60      itojun    298:                    ip->ip_src, ip->ip_p, errno, notify);
                    299:
                    300:                /* XXX mapped address case */
                    301:        } else
1.95      dyoung    302:                in_pcbnotifyall(&rawcbtable, satocsin(sa)->sin_addr, errno,
1.60      itojun    303:                    notify);
                    304:        return NULL;
1.1       cgd       305: }
                    306:
                    307: /*
                    308:  * Generate IP header and pass packet to ip_output.
                    309:  * Tack on options user may have setup with control call.
                    310:  */
1.9       mycroft   311: int
1.24      christos  312: rip_output(struct mbuf *m, ...)
                    313: {
1.53      augustss  314:        struct inpcb *inp;
                    315:        struct ip *ip;
1.10      mycroft   316:        struct mbuf *opts;
1.24      christos  317:        int flags;
                    318:        va_list ap;
                    319:
                    320:        va_start(ap, m);
1.27      mycroft   321:        inp = va_arg(ap, struct inpcb *);
1.24      christos  322:        va_end(ap);
                    323:
1.27      mycroft   324:        flags =
1.37      matt      325:            (inp->inp_socket->so_options & SO_DONTROUTE) | IP_ALLOWBROADCAST
                    326:            | IP_RETURNMTU;
1.1       cgd       327:
                    328:        /*
                    329:         * If the user handed us a complete IP packet, use it.
                    330:         * Otherwise, allocate an mbuf for a header and fill it in.
                    331:         */
1.13      mycroft   332:        if ((inp->inp_flags & INP_HDRINCL) == 0) {
1.35      thorpej   333:                if ((m->m_pkthdr.len + sizeof(struct ip)) > IP_MAXPACKET) {
                    334:                        m_freem(m);
                    335:                        return (EMSGSIZE);
                    336:                }
1.68      itojun    337:                M_PREPEND(m, sizeof(struct ip), M_DONTWAIT);
                    338:                if (!m)
                    339:                        return (ENOBUFS);
1.1       cgd       340:                ip = mtod(m, struct ip *);
                    341:                ip->ip_tos = 0;
1.62      itojun    342:                ip->ip_off = htons(0);
1.13      mycroft   343:                ip->ip_p = inp->inp_ip.ip_p;
1.62      itojun    344:                ip->ip_len = htons(m->m_pkthdr.len);
1.13      mycroft   345:                ip->ip_src = inp->inp_laddr;
1.27      mycroft   346:                ip->ip_dst = inp->inp_faddr;
1.1       cgd       347:                ip->ip_ttl = MAXTTL;
1.13      mycroft   348:                opts = inp->inp_options;
                    349:        } else {
1.35      thorpej   350:                if (m->m_pkthdr.len > IP_MAXPACKET) {
                    351:                        m_freem(m);
                    352:                        return (EMSGSIZE);
                    353:                }
1.13      mycroft   354:                ip = mtod(m, struct ip *);
1.65      thorpej   355:
                    356:                /*
                    357:                 * If the mbuf is read-only, we need to allocate
                    358:                 * a new mbuf for the header, since we need to
                    359:                 * modify the header.
                    360:                 */
                    361:                if (M_READONLY(m)) {
                    362:                        int hlen = ip->ip_hl << 2;
                    363:
                    364:                        m = m_copyup(m, hlen, (max_linkhdr + 3) & ~3);
                    365:                        if (m == NULL)
                    366:                                return (ENOMEM);        /* XXX */
                    367:                        ip = mtod(m, struct ip *);
                    368:                }
                    369:
1.62      itojun    370:                /* XXX userland passes ip_len and ip_off in host order */
1.38      mycroft   371:                if (m->m_pkthdr.len != ip->ip_len) {
                    372:                        m_freem(m);
                    373:                        return (EINVAL);
                    374:                }
1.62      itojun    375:                HTONS(ip->ip_len);
                    376:                HTONS(ip->ip_off);
1.103     matt      377:                if (ip->ip_id != 0 || m->m_pkthdr.len < IP_MINFRAGSIZE)
                    378:                        flags |= IP_NOIPNEWID;
1.13      mycroft   379:                opts = NULL;
                    380:                /* XXX prevent ip_output from overwriting header fields */
                    381:                flags |= IP_RAWOUTPUT;
1.105     thorpej   382:                IP_STATINC(IP_STAT_RAWOUT);
1.1       cgd       383:        }
1.62      itojun    384:        return (ip_output(m, opts, &inp->inp_route, flags, inp->inp_moptions,
1.73      itojun    385:             inp->inp_socket, &inp->inp_errormtu));
1.1       cgd       386: }
                    387:
                    388: /*
                    389:  * Raw IP socket option processing.
                    390:  */
1.9       mycroft   391: int
1.108     plunky    392: rip_ctloutput(int op, struct socket *so, struct sockopt *sopt)
1.1       cgd       393: {
1.53      augustss  394:        struct inpcb *inp = sotoinpcb(so);
1.31      mycroft   395:        int error = 0;
1.108     plunky    396:        int optval;
1.1       cgd       397:
1.108     plunky    398:        if (sopt->sopt_level == SOL_SOCKET && sopt->sopt_name == SO_NOHEADER) {
1.100     dyoung    399:                if (op == PRCO_GETOPT) {
1.108     plunky    400:                        optval = (inp->inp_flags & INP_NOHEADER) ? 1 : 0;
                    401:                        error = sockopt_set(sopt, &optval, sizeof(optval));
                    402:                } else if (op == PRCO_SETOPT) {
                    403:                        error = sockopt_getint(sopt, &optval);
                    404:                        if (error)
                    405:                                goto out;
                    406:                        if (optval) {
                    407:                                inp->inp_flags &= ~INP_HDRINCL;
                    408:                                inp->inp_flags |= INP_NOHEADER;
                    409:                        } else
                    410:                                inp->inp_flags &= ~INP_NOHEADER;
                    411:                }
                    412:                goto out;
                    413:        } else if (sopt->sopt_level != IPPROTO_IP)
                    414:                return ip_ctloutput(op, so, sopt);
1.100     dyoung    415:
                    416:        switch (op) {
1.31      mycroft   417:
                    418:        case PRCO_SETOPT:
1.108     plunky    419:                switch (sopt->sopt_name) {
1.31      mycroft   420:                case IP_HDRINCL:
1.108     plunky    421:                        error = sockopt_getint(sopt, &optval);
                    422:                        if (error)
                    423:                                break;
                    424:                        if (optval)
1.100     dyoung    425:                                inp->inp_flags |= INP_HDRINCL;
                    426:                        else
                    427:                                inp->inp_flags &= ~INP_HDRINCL;
1.108     plunky    428:                        break;
1.31      mycroft   429:
                    430: #ifdef MROUTING
                    431:                case MRT_INIT:
                    432:                case MRT_DONE:
                    433:                case MRT_ADD_VIF:
                    434:                case MRT_DEL_VIF:
                    435:                case MRT_ADD_MFC:
                    436:                case MRT_DEL_MFC:
                    437:                case MRT_ASSERT:
1.81      manu      438:                case MRT_API_CONFIG:
                    439:                case MRT_ADD_BW_UPCALL:
                    440:                case MRT_DEL_BW_UPCALL:
1.108     plunky    441:                        error = ip_mrouter_set(so, sopt);
1.31      mycroft   442:                        break;
                    443: #endif
                    444:
                    445:                default:
1.108     plunky    446:                        error = ip_ctloutput(op, so, sopt);
1.31      mycroft   447:                        break;
1.13      mycroft   448:                }
                    449:                break;
1.1       cgd       450:
1.31      mycroft   451:        case PRCO_GETOPT:
1.108     plunky    452:                switch (sopt->sopt_name) {
1.31      mycroft   453:                case IP_HDRINCL:
1.108     plunky    454:                        optval = inp->inp_flags & INP_HDRINCL;
                    455:                        error = sockopt_set(sopt, &optval, sizeof(optval));
1.31      mycroft   456:                        break;
                    457:
1.6       hpeyerl   458: #ifdef MROUTING
1.31      mycroft   459:                case MRT_VERSION:
                    460:                case MRT_ASSERT:
1.81      manu      461:                case MRT_API_SUPPORT:
                    462:                case MRT_API_CONFIG:
1.108     plunky    463:                        error = ip_mrouter_get(so, sopt);
1.18      mycroft   464:                        break;
1.31      mycroft   465: #endif
                    466:
1.18      mycroft   467:                default:
1.108     plunky    468:                        error = ip_ctloutput(op, so, sopt);
1.18      mycroft   469:                        break;
                    470:                }
1.31      mycroft   471:                break;
1.1       cgd       472:        }
1.108     plunky    473:  out:
1.100     dyoung    474:        return error;
1.1       cgd       475: }
                    476:
1.27      mycroft   477: int
1.83      perry     478: rip_bind(struct inpcb *inp, struct mbuf *nam)
1.29      mycroft   479: {
                    480:        struct sockaddr_in *addr = mtod(nam, struct sockaddr_in *);
                    481:
                    482:        if (nam->m_len != sizeof(*addr))
                    483:                return (EINVAL);
1.58      matt      484:        if (TAILQ_FIRST(&ifnet) == 0)
1.29      mycroft   485:                return (EADDRNOTAVAIL);
                    486:        if (addr->sin_family != AF_INET &&
                    487:            addr->sin_family != AF_IMPLINK)
                    488:                return (EAFNOSUPPORT);
1.32      mycroft   489:        if (!in_nullhost(addr->sin_addr) &&
1.29      mycroft   490:            ifa_ifwithaddr(sintosa(addr)) == 0)
                    491:                return (EADDRNOTAVAIL);
                    492:        inp->inp_laddr = addr->sin_addr;
                    493:        return (0);
                    494: }
                    495:
                    496: int
1.83      perry     497: rip_connect(struct inpcb *inp, struct mbuf *nam)
1.27      mycroft   498: {
                    499:        struct sockaddr_in *addr = mtod(nam, struct sockaddr_in *);
                    500:
                    501:        if (nam->m_len != sizeof(*addr))
                    502:                return (EINVAL);
1.58      matt      503:        if (TAILQ_FIRST(&ifnet) == 0)
1.27      mycroft   504:                return (EADDRNOTAVAIL);
                    505:        if (addr->sin_family != AF_INET &&
                    506:            addr->sin_family != AF_IMPLINK)
                    507:                return (EAFNOSUPPORT);
                    508:        inp->inp_faddr = addr->sin_addr;
                    509:        return (0);
                    510: }
                    511:
                    512: void
1.83      perry     513: rip_disconnect(struct inpcb *inp)
1.27      mycroft   514: {
                    515:
1.32      mycroft   516:        inp->inp_faddr = zeroin_addr;
1.27      mycroft   517: }
                    518:
1.13      mycroft   519: u_long rip_sendspace = RIPSNDQ;
                    520: u_long rip_recvspace = RIPRCVQ;
                    521:
1.1       cgd       522: /*ARGSUSED*/
1.9       mycroft   523: int
1.83      perry     524: rip_usrreq(struct socket *so, int req,
1.88      christos  525:     struct mbuf *m, struct mbuf *nam, struct mbuf *control, struct lwp *l)
1.1       cgd       526: {
1.53      augustss  527:        struct inpcb *inp;
1.27      mycroft   528:        int s;
1.53      augustss  529:        int error = 0;
1.13      mycroft   530: #ifdef MROUTING
1.6       hpeyerl   531:        extern struct socket *ip_mrouter;
                    532: #endif
1.27      mycroft   533:
1.22      pk        534:        if (req == PRU_CONTROL)
1.111     dyoung    535:                return in_control(so, (long)m, nam, (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
1.111     dyoung    554:        if (inp == NULL && 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:
1.110     pooka     699: static void
                    700: sysctl_net_inet_raw_setup(struct sysctllog **clog)
1.84      atatat    701: {
                    702:
                    703:        sysctl_createv(clog, 0, NULL, NULL,
                    704:                       CTLFLAG_PERMANENT,
                    705:                       CTLTYPE_NODE, "net", NULL,
                    706:                       NULL, 0, NULL, 0,
                    707:                       CTL_NET, CTL_EOL);
                    708:        sysctl_createv(clog, 0, NULL, NULL,
                    709:                       CTLFLAG_PERMANENT,
                    710:                       CTLTYPE_NODE, "inet", NULL,
                    711:                       NULL, 0, NULL, 0,
                    712:                       CTL_NET, PF_INET, CTL_EOL);
                    713:        sysctl_createv(clog, 0, NULL, NULL,
                    714:                       CTLFLAG_PERMANENT,
                    715:                       CTLTYPE_NODE, "raw",
                    716:                       SYSCTL_DESCR("Raw IPv4 settings"),
                    717:                       NULL, 0, NULL, 0,
                    718:                       CTL_NET, PF_INET, IPPROTO_RAW, CTL_EOL);
                    719:
                    720:        sysctl_createv(clog, 0, NULL, NULL,
                    721:                       CTLFLAG_PERMANENT,
1.86      atatat    722:                       CTLTYPE_STRUCT, "pcblist",
1.84      atatat    723:                       SYSCTL_DESCR("Raw IPv4 control block list"),
                    724:                       sysctl_inpcblist, 0, &rawcbtable, 0,
                    725:                       CTL_NET, PF_INET, IPPROTO_RAW,
                    726:                       CTL_CREATE, CTL_EOL);
                    727: }

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