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Annotation of src/sys/netinet/raw_ip.c, Revision 1.112.2.1

1.112.2.1! yamt        1: /*     $NetBSD$        */
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>
1.112.2.1! yamt       64: __KERNEL_RCSID(0, "$NetBSD$");
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:
1.72      jonathan   97: #ifdef FAST_IPSEC
                     98: #include <netipsec/ipsec.h>
1.106     thorpej    99: #include <netipsec/ipsec_var.h>
                    100: #include <netipsec/ipsec_private.h>
                    101: #endif /* FAST_IPSEC */
1.72      jonathan  102:
1.109     christos  103: #ifdef COMPAT_50
                    104: #include <compat/sys/socket.h>
                    105: #endif
                    106:
1.20      mycroft   107: struct inpcbtable rawcbtable;
1.30      pk        108:
1.82      perry     109: int     rip_pcbnotify(struct inpcbtable *, struct in_addr,
                    110:     struct in_addr, int, int, void (*)(struct inpcb *, int));
                    111: int     rip_bind(struct inpcb *, struct mbuf *);
                    112: int     rip_connect(struct inpcb *, struct mbuf *);
                    113: void    rip_disconnect(struct inpcb *);
1.13      mycroft   114:
1.110     pooka     115: static void sysctl_net_inet_raw_setup(struct sysctllog **);
                    116:
1.13      mycroft   117: /*
                    118:  * Nominal space allocated to a raw ip socket.
                    119:  */
                    120: #define        RIPSNDQ         8192
                    121: #define        RIPRCVQ         8192
1.1       cgd       122:
                    123: /*
                    124:  * Raw interface to IP protocol.
                    125:  */
1.13      mycroft   126:
                    127: /*
                    128:  * Initialize raw connection block q.
                    129:  */
                    130: void
1.83      perry     131: rip_init(void)
1.13      mycroft   132: {
                    133:
1.110     pooka     134:        sysctl_net_inet_raw_setup(NULL);
1.33      mycroft   135:        in_pcbinit(&rawcbtable, 1, 1);
1.13      mycroft   136: }
                    137:
1.100     dyoung    138: static void
                    139: rip_sbappendaddr(struct inpcb *last, struct ip *ip, const struct sockaddr *sa,
                    140:     int hlen, struct mbuf *opts, struct mbuf *n)
                    141: {
                    142:        if (last->inp_flags & INP_NOHEADER)
                    143:                m_adj(n, hlen);
1.109     christos  144:        if (last->inp_flags & INP_CONTROLOPTS
                    145: #ifdef SO_OTIMESTAMP
                    146:            || last->inp_socket->so_options & SO_OTIMESTAMP
                    147: #endif
                    148:            || last->inp_socket->so_options & SO_TIMESTAMP)
1.100     dyoung    149:                ip_savecontrol(last, &opts, ip, n);
                    150:        if (sbappendaddr(&last->inp_socket->so_rcv, sa, n, opts) == 0) {
                    151:                /* should notify about lost packet */
                    152:                m_freem(n);
                    153:                if (opts)
                    154:                        m_freem(opts);
                    155:        } else
                    156:                sorwakeup(last->inp_socket);
                    157: }
                    158:
1.1       cgd       159: /*
                    160:  * Setup generic address and protocol structures
                    161:  * for raw_input routine, then pass them along with
                    162:  * mbuf chain.
                    163:  */
1.9       mycroft   164: void
1.24      christos  165: rip_input(struct mbuf *m, ...)
1.1       cgd       166: {
1.100     dyoung    167:        int hlen, proto;
1.53      augustss  168:        struct ip *ip = mtod(m, struct ip *);
1.75      itojun    169:        struct inpcb_hdr *inph;
1.53      augustss  170:        struct inpcb *inp;
1.97      dyoung    171:        struct inpcb *last = NULL;
                    172:        struct mbuf *n, *opts = NULL;
1.32      mycroft   173:        struct sockaddr_in ripsrc;
1.43      itojun    174:        va_list ap;
                    175:
                    176:        va_start(ap, m);
1.64      simonb    177:        (void)va_arg(ap, int);          /* ignore value, advance ap */
1.43      itojun    178:        proto = va_arg(ap, int);
                    179:        va_end(ap);
1.1       cgd       180:
1.97      dyoung    181:        sockaddr_in_init(&ripsrc, &ip->ip_src, 0);
1.42      thorpej   182:
                    183:        /*
                    184:         * XXX Compatibility: programs using raw IP expect ip_len
1.62      itojun    185:         * XXX to have the header length subtracted, and in host order.
                    186:         * XXX ip_off is also expected to be host order.
1.42      thorpej   187:         */
1.100     dyoung    188:        hlen = ip->ip_hl << 2;
                    189:        ip->ip_len = ntohs(ip->ip_len) - hlen;
1.62      itojun    190:        NTOHS(ip->ip_off);
1.32      mycroft   191:
1.75      itojun    192:        CIRCLEQ_FOREACH(inph, &rawcbtable.inpt_queue, inph_queue) {
                    193:                inp = (struct inpcb *)inph;
                    194:                if (inp->inp_af != AF_INET)
                    195:                        continue;
1.43      itojun    196:                if (inp->inp_ip.ip_p && inp->inp_ip.ip_p != proto)
1.13      mycroft   197:                        continue;
1.32      mycroft   198:                if (!in_nullhost(inp->inp_laddr) &&
                    199:                    !in_hosteq(inp->inp_laddr, ip->ip_dst))
1.13      mycroft   200:                        continue;
1.32      mycroft   201:                if (!in_nullhost(inp->inp_faddr) &&
                    202:                    !in_hosteq(inp->inp_faddr, ip->ip_src))
1.13      mycroft   203:                        continue;
1.97      dyoung    204:                if (last == NULL)
                    205:                        ;
1.112.2.1! yamt      206: #if defined(FAST_IPSEC)
1.97      dyoung    207:                /* check AH/ESP integrity. */
                    208:                else if (ipsec4_in_reject_so(m, last->inp_socket)) {
1.106     thorpej   209:                        IPSEC_STATINC(IPSEC_STAT_IN_POLVIO);
1.97      dyoung    210:                        /* do not inject data to pcb */
                    211:                }
                    212: #endif /*IPSEC*/
1.99      dyoung    213:                else if ((n = m_copypacket(m, M_DONTWAIT)) != NULL) {
1.100     dyoung    214:                        rip_sbappendaddr(last, ip, sintosa(&ripsrc), hlen, opts,
                    215:                            n);
1.97      dyoung    216:                        opts = NULL;
1.13      mycroft   217:                }
1.36      thorpej   218:                last = inp;
1.13      mycroft   219:        }
1.112.2.1! yamt      220: #if defined(FAST_IPSEC)
1.55      itojun    221:        /* check AH/ESP integrity. */
1.97      dyoung    222:        if (last != NULL && ipsec4_in_reject_so(m, last->inp_socket)) {
1.55      itojun    223:                m_freem(m);
1.106     thorpej   224:                IPSEC_STATINC(IPSEC_STAT_IN_POLVIO);
1.105     thorpej   225:                IP_STATDEC(IP_STAT_DELIVERED);
1.55      itojun    226:                /* do not inject data to pcb */
                    227:        } else
                    228: #endif /*IPSEC*/
1.100     dyoung    229:        if (last != NULL)
                    230:                rip_sbappendaddr(last, ip, sintosa(&ripsrc), hlen, opts, m);
                    231:        else if (inetsw[ip_protox[ip->ip_p]].pr_input == rip_input) {
1.105     thorpej   232:                uint64_t *ips;
                    233:
1.97      dyoung    234:                icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PROTOCOL,
                    235:                    0, 0);
1.105     thorpej   236:                ips = IP_STAT_GETREF();
                    237:                ips[IP_STAT_NOPROTO]++;
                    238:                ips[IP_STAT_DELIVERED]--;
                    239:                IP_STAT_PUTREF();
1.97      dyoung    240:        } else
                    241:                m_freem(m);
1.43      itojun    242:        return;
1.60      itojun    243: }
                    244:
                    245: int
1.83      perry     246: rip_pcbnotify(struct inpcbtable *table,
                    247:     struct in_addr faddr, struct in_addr laddr, int proto, int errno,
                    248:     void (*notify)(struct inpcb *, int))
1.60      itojun    249: {
                    250:        struct inpcb *inp, *ninp;
                    251:        int nmatch;
                    252:
                    253:        nmatch = 0;
1.75      itojun    254:        for (inp = (struct inpcb *)CIRCLEQ_FIRST(&table->inpt_queue);
1.60      itojun    255:            inp != (struct inpcb *)&table->inpt_queue;
                    256:            inp = ninp) {
1.75      itojun    257:                ninp = (struct inpcb *)inp->inp_queue.cqe_next;
                    258:                if (inp->inp_af != AF_INET)
                    259:                        continue;
1.60      itojun    260:                if (inp->inp_ip.ip_p && inp->inp_ip.ip_p != proto)
                    261:                        continue;
                    262:                if (in_hosteq(inp->inp_faddr, faddr) &&
                    263:                    in_hosteq(inp->inp_laddr, laddr)) {
                    264:                        (*notify)(inp, errno);
                    265:                        nmatch++;
                    266:                }
                    267:        }
                    268:
                    269:        return nmatch;
                    270: }
                    271:
                    272: void *
1.95      dyoung    273: rip_ctlinput(int cmd, const struct sockaddr *sa, void *v)
1.60      itojun    274: {
                    275:        struct ip *ip = v;
1.82      perry     276:        void (*notify)(struct inpcb *, int) = in_rtchange;
1.60      itojun    277:        int errno;
                    278:
                    279:        if (sa->sa_family != AF_INET ||
                    280:            sa->sa_len != sizeof(struct sockaddr_in))
                    281:                return NULL;
                    282:        if ((unsigned)cmd >= PRC_NCMDS)
                    283:                return NULL;
                    284:        errno = inetctlerrmap[cmd];
                    285:        if (PRC_IS_REDIRECT(cmd))
                    286:                notify = in_rtchange, ip = 0;
                    287:        else if (cmd == PRC_HOSTDEAD)
                    288:                ip = 0;
                    289:        else if (errno == 0)
                    290:                return NULL;
                    291:        if (ip) {
1.95      dyoung    292:                rip_pcbnotify(&rawcbtable, satocsin(sa)->sin_addr,
1.60      itojun    293:                    ip->ip_src, ip->ip_p, errno, notify);
                    294:
                    295:                /* XXX mapped address case */
                    296:        } else
1.95      dyoung    297:                in_pcbnotifyall(&rawcbtable, satocsin(sa)->sin_addr, errno,
1.60      itojun    298:                    notify);
                    299:        return NULL;
1.1       cgd       300: }
                    301:
                    302: /*
                    303:  * Generate IP header and pass packet to ip_output.
                    304:  * Tack on options user may have setup with control call.
                    305:  */
1.9       mycroft   306: int
1.24      christos  307: rip_output(struct mbuf *m, ...)
                    308: {
1.53      augustss  309:        struct inpcb *inp;
                    310:        struct ip *ip;
1.10      mycroft   311:        struct mbuf *opts;
1.24      christos  312:        int flags;
                    313:        va_list ap;
                    314:
                    315:        va_start(ap, m);
1.27      mycroft   316:        inp = va_arg(ap, struct inpcb *);
1.24      christos  317:        va_end(ap);
                    318:
1.27      mycroft   319:        flags =
1.37      matt      320:            (inp->inp_socket->so_options & SO_DONTROUTE) | IP_ALLOWBROADCAST
                    321:            | IP_RETURNMTU;
1.1       cgd       322:
                    323:        /*
                    324:         * If the user handed us a complete IP packet, use it.
                    325:         * Otherwise, allocate an mbuf for a header and fill it in.
                    326:         */
1.13      mycroft   327:        if ((inp->inp_flags & INP_HDRINCL) == 0) {
1.35      thorpej   328:                if ((m->m_pkthdr.len + sizeof(struct ip)) > IP_MAXPACKET) {
                    329:                        m_freem(m);
                    330:                        return (EMSGSIZE);
                    331:                }
1.68      itojun    332:                M_PREPEND(m, sizeof(struct ip), M_DONTWAIT);
                    333:                if (!m)
                    334:                        return (ENOBUFS);
1.1       cgd       335:                ip = mtod(m, struct ip *);
                    336:                ip->ip_tos = 0;
1.62      itojun    337:                ip->ip_off = htons(0);
1.13      mycroft   338:                ip->ip_p = inp->inp_ip.ip_p;
1.62      itojun    339:                ip->ip_len = htons(m->m_pkthdr.len);
1.13      mycroft   340:                ip->ip_src = inp->inp_laddr;
1.27      mycroft   341:                ip->ip_dst = inp->inp_faddr;
1.1       cgd       342:                ip->ip_ttl = MAXTTL;
1.13      mycroft   343:                opts = inp->inp_options;
                    344:        } else {
1.35      thorpej   345:                if (m->m_pkthdr.len > IP_MAXPACKET) {
                    346:                        m_freem(m);
                    347:                        return (EMSGSIZE);
                    348:                }
1.13      mycroft   349:                ip = mtod(m, struct ip *);
1.65      thorpej   350:
                    351:                /*
                    352:                 * If the mbuf is read-only, we need to allocate
                    353:                 * a new mbuf for the header, since we need to
                    354:                 * modify the header.
                    355:                 */
                    356:                if (M_READONLY(m)) {
                    357:                        int hlen = ip->ip_hl << 2;
                    358:
                    359:                        m = m_copyup(m, hlen, (max_linkhdr + 3) & ~3);
                    360:                        if (m == NULL)
                    361:                                return (ENOMEM);        /* XXX */
                    362:                        ip = mtod(m, struct ip *);
                    363:                }
                    364:
1.62      itojun    365:                /* XXX userland passes ip_len and ip_off in host order */
1.38      mycroft   366:                if (m->m_pkthdr.len != ip->ip_len) {
                    367:                        m_freem(m);
                    368:                        return (EINVAL);
                    369:                }
1.62      itojun    370:                HTONS(ip->ip_len);
                    371:                HTONS(ip->ip_off);
1.103     matt      372:                if (ip->ip_id != 0 || m->m_pkthdr.len < IP_MINFRAGSIZE)
                    373:                        flags |= IP_NOIPNEWID;
1.13      mycroft   374:                opts = NULL;
                    375:                /* XXX prevent ip_output from overwriting header fields */
                    376:                flags |= IP_RAWOUTPUT;
1.105     thorpej   377:                IP_STATINC(IP_STAT_RAWOUT);
1.1       cgd       378:        }
1.62      itojun    379:        return (ip_output(m, opts, &inp->inp_route, flags, inp->inp_moptions,
1.73      itojun    380:             inp->inp_socket, &inp->inp_errormtu));
1.1       cgd       381: }
                    382:
                    383: /*
                    384:  * Raw IP socket option processing.
                    385:  */
1.9       mycroft   386: int
1.108     plunky    387: rip_ctloutput(int op, struct socket *so, struct sockopt *sopt)
1.1       cgd       388: {
1.53      augustss  389:        struct inpcb *inp = sotoinpcb(so);
1.31      mycroft   390:        int error = 0;
1.108     plunky    391:        int optval;
1.1       cgd       392:
1.108     plunky    393:        if (sopt->sopt_level == SOL_SOCKET && sopt->sopt_name == SO_NOHEADER) {
1.100     dyoung    394:                if (op == PRCO_GETOPT) {
1.108     plunky    395:                        optval = (inp->inp_flags & INP_NOHEADER) ? 1 : 0;
                    396:                        error = sockopt_set(sopt, &optval, sizeof(optval));
                    397:                } else if (op == PRCO_SETOPT) {
                    398:                        error = sockopt_getint(sopt, &optval);
                    399:                        if (error)
                    400:                                goto out;
                    401:                        if (optval) {
                    402:                                inp->inp_flags &= ~INP_HDRINCL;
                    403:                                inp->inp_flags |= INP_NOHEADER;
                    404:                        } else
                    405:                                inp->inp_flags &= ~INP_NOHEADER;
                    406:                }
                    407:                goto out;
                    408:        } else if (sopt->sopt_level != IPPROTO_IP)
                    409:                return ip_ctloutput(op, so, sopt);
1.100     dyoung    410:
                    411:        switch (op) {
1.31      mycroft   412:
                    413:        case PRCO_SETOPT:
1.108     plunky    414:                switch (sopt->sopt_name) {
1.31      mycroft   415:                case IP_HDRINCL:
1.108     plunky    416:                        error = sockopt_getint(sopt, &optval);
                    417:                        if (error)
                    418:                                break;
                    419:                        if (optval)
1.100     dyoung    420:                                inp->inp_flags |= INP_HDRINCL;
                    421:                        else
                    422:                                inp->inp_flags &= ~INP_HDRINCL;
1.108     plunky    423:                        break;
1.31      mycroft   424:
                    425: #ifdef MROUTING
                    426:                case MRT_INIT:
                    427:                case MRT_DONE:
                    428:                case MRT_ADD_VIF:
                    429:                case MRT_DEL_VIF:
                    430:                case MRT_ADD_MFC:
                    431:                case MRT_DEL_MFC:
                    432:                case MRT_ASSERT:
1.81      manu      433:                case MRT_API_CONFIG:
                    434:                case MRT_ADD_BW_UPCALL:
                    435:                case MRT_DEL_BW_UPCALL:
1.108     plunky    436:                        error = ip_mrouter_set(so, sopt);
1.31      mycroft   437:                        break;
                    438: #endif
                    439:
                    440:                default:
1.108     plunky    441:                        error = ip_ctloutput(op, so, sopt);
1.31      mycroft   442:                        break;
1.13      mycroft   443:                }
                    444:                break;
1.1       cgd       445:
1.31      mycroft   446:        case PRCO_GETOPT:
1.108     plunky    447:                switch (sopt->sopt_name) {
1.31      mycroft   448:                case IP_HDRINCL:
1.108     plunky    449:                        optval = inp->inp_flags & INP_HDRINCL;
                    450:                        error = sockopt_set(sopt, &optval, sizeof(optval));
1.31      mycroft   451:                        break;
                    452:
1.6       hpeyerl   453: #ifdef MROUTING
1.31      mycroft   454:                case MRT_VERSION:
                    455:                case MRT_ASSERT:
1.81      manu      456:                case MRT_API_SUPPORT:
                    457:                case MRT_API_CONFIG:
1.108     plunky    458:                        error = ip_mrouter_get(so, sopt);
1.18      mycroft   459:                        break;
1.31      mycroft   460: #endif
                    461:
1.18      mycroft   462:                default:
1.108     plunky    463:                        error = ip_ctloutput(op, so, sopt);
1.18      mycroft   464:                        break;
                    465:                }
1.31      mycroft   466:                break;
1.1       cgd       467:        }
1.108     plunky    468:  out:
1.100     dyoung    469:        return error;
1.1       cgd       470: }
                    471:
1.27      mycroft   472: int
1.83      perry     473: rip_bind(struct inpcb *inp, struct mbuf *nam)
1.29      mycroft   474: {
                    475:        struct sockaddr_in *addr = mtod(nam, struct sockaddr_in *);
                    476:
                    477:        if (nam->m_len != sizeof(*addr))
                    478:                return (EINVAL);
1.58      matt      479:        if (TAILQ_FIRST(&ifnet) == 0)
1.29      mycroft   480:                return (EADDRNOTAVAIL);
                    481:        if (addr->sin_family != AF_INET &&
                    482:            addr->sin_family != AF_IMPLINK)
                    483:                return (EAFNOSUPPORT);
1.32      mycroft   484:        if (!in_nullhost(addr->sin_addr) &&
1.29      mycroft   485:            ifa_ifwithaddr(sintosa(addr)) == 0)
                    486:                return (EADDRNOTAVAIL);
                    487:        inp->inp_laddr = addr->sin_addr;
                    488:        return (0);
                    489: }
                    490:
                    491: int
1.83      perry     492: rip_connect(struct inpcb *inp, struct mbuf *nam)
1.27      mycroft   493: {
                    494:        struct sockaddr_in *addr = mtod(nam, struct sockaddr_in *);
                    495:
                    496:        if (nam->m_len != sizeof(*addr))
                    497:                return (EINVAL);
1.58      matt      498:        if (TAILQ_FIRST(&ifnet) == 0)
1.27      mycroft   499:                return (EADDRNOTAVAIL);
                    500:        if (addr->sin_family != AF_INET &&
                    501:            addr->sin_family != AF_IMPLINK)
                    502:                return (EAFNOSUPPORT);
                    503:        inp->inp_faddr = addr->sin_addr;
                    504:        return (0);
                    505: }
                    506:
                    507: void
1.83      perry     508: rip_disconnect(struct inpcb *inp)
1.27      mycroft   509: {
                    510:
1.32      mycroft   511:        inp->inp_faddr = zeroin_addr;
1.27      mycroft   512: }
                    513:
1.13      mycroft   514: u_long rip_sendspace = RIPSNDQ;
                    515: u_long rip_recvspace = RIPRCVQ;
                    516:
1.1       cgd       517: /*ARGSUSED*/
1.9       mycroft   518: int
1.83      perry     519: rip_usrreq(struct socket *so, int req,
1.88      christos  520:     struct mbuf *m, struct mbuf *nam, struct mbuf *control, struct lwp *l)
1.1       cgd       521: {
1.53      augustss  522:        struct inpcb *inp;
1.27      mycroft   523:        int s;
1.53      augustss  524:        int error = 0;
1.13      mycroft   525: #ifdef MROUTING
1.6       hpeyerl   526:        extern struct socket *ip_mrouter;
                    527: #endif
1.27      mycroft   528:
1.22      pk        529:        if (req == PRU_CONTROL)
1.111     dyoung    530:                return in_control(so, (long)m, nam, (struct ifnet *)control, l);
1.49      thorpej   531:
1.93      tls       532:        s = splsoftnet();
                    533:
1.50      thorpej   534:        if (req == PRU_PURGEIF) {
1.107     ad        535:                mutex_enter(softnet_lock);
1.56      itojun    536:                in_pcbpurgeif0(&rawcbtable, (struct ifnet *)control);
1.50      thorpej   537:                in_purgeif((struct ifnet *)control);
                    538:                in_pcbpurgeif(&rawcbtable, (struct ifnet *)control);
1.107     ad        539:                mutex_exit(softnet_lock);
1.93      tls       540:                splx(s);
1.49      thorpej   541:                return (0);
                    542:        }
1.22      pk        543:
1.27      mycroft   544:        inp = sotoinpcb(so);
1.28      mycroft   545: #ifdef DIAGNOSTIC
                    546:        if (req != PRU_SEND && req != PRU_SENDOOB && control)
                    547:                panic("rip_usrreq: unexpected control mbuf");
                    548: #endif
1.111     dyoung    549:        if (inp == NULL && req != PRU_ATTACH) {
1.22      pk        550:                error = EINVAL;
                    551:                goto release;
                    552:        }
                    553:
1.1       cgd       554:        switch (req) {
                    555:
                    556:        case PRU_ATTACH:
1.107     ad        557:                sosetlock(so);
1.27      mycroft   558:                if (inp != 0) {
                    559:                        error = EISCONN;
                    560:                        break;
                    561:                }
1.94      elad      562:
                    563:                if (l == NULL) {
1.13      mycroft   564:                        error = EACCES;
                    565:                        break;
                    566:                }
1.94      elad      567:
                    568:                /* XXX: raw socket permissions are checked in socreate() */
                    569:
1.27      mycroft   570:                if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
                    571:                        error = soreserve(so, rip_sendspace, rip_recvspace);
                    572:                        if (error)
                    573:                                break;
                    574:                }
                    575:                error = in_pcballoc(so, &rawcbtable);
                    576:                if (error)
1.13      mycroft   577:                        break;
1.27      mycroft   578:                inp = sotoinpcb(so);
1.17      cgd       579:                inp->inp_ip.ip_p = (long)nam;
1.1       cgd       580:                break;
                    581:
                    582:        case PRU_DETACH:
1.13      mycroft   583: #ifdef MROUTING
1.6       hpeyerl   584:                if (so == ip_mrouter)
                    585:                        ip_mrouter_done();
                    586: #endif
1.13      mycroft   587:                in_pcbdetach(inp);
1.1       cgd       588:                break;
                    589:
                    590:        case PRU_BIND:
1.29      mycroft   591:                error = rip_bind(inp, nam);
1.27      mycroft   592:                break;
                    593:
                    594:        case PRU_LISTEN:
                    595:                error = EOPNOTSUPP;
                    596:                break;
                    597:
                    598:        case PRU_CONNECT:
                    599:                error = rip_connect(inp, nam);
                    600:                if (error)
1.13      mycroft   601:                        break;
1.1       cgd       602:                soisconnected(so);
1.13      mycroft   603:                break;
                    604:
                    605:        case PRU_CONNECT2:
                    606:                error = EOPNOTSUPP;
                    607:                break;
                    608:
1.27      mycroft   609:        case PRU_DISCONNECT:
                    610:                soisdisconnected(so);
                    611:                rip_disconnect(inp);
                    612:                break;
                    613:
1.13      mycroft   614:        /*
                    615:         * Mark the connection as being incapable of further input.
                    616:         */
                    617:        case PRU_SHUTDOWN:
                    618:                socantsendmore(so);
                    619:                break;
                    620:
1.27      mycroft   621:        case PRU_RCVD:
                    622:                error = EOPNOTSUPP;
                    623:                break;
                    624:
1.13      mycroft   625:        /*
                    626:         * Ship a packet out.  The appropriate raw output
                    627:         * routine handles any massaging necessary.
                    628:         */
                    629:        case PRU_SEND:
1.28      mycroft   630:                if (control && control->m_len) {
                    631:                        m_freem(control);
                    632:                        m_freem(m);
                    633:                        error = EINVAL;
                    634:                        break;
                    635:                }
                    636:        {
1.27      mycroft   637:                if (nam) {
                    638:                        if ((so->so_state & SS_ISCONNECTED) != 0) {
1.13      mycroft   639:                                error = EISCONN;
1.28      mycroft   640:                                goto die;
1.13      mycroft   641:                        }
1.27      mycroft   642:                        error = rip_connect(inp, nam);
                    643:                        if (error) {
1.28      mycroft   644:                        die:
1.27      mycroft   645:                                m_freem(m);
                    646:                                break;
                    647:                        }
1.13      mycroft   648:                } else {
1.27      mycroft   649:                        if ((so->so_state & SS_ISCONNECTED) == 0) {
1.13      mycroft   650:                                error = ENOTCONN;
1.28      mycroft   651:                                goto die;
1.13      mycroft   652:                        }
                    653:                }
1.27      mycroft   654:                error = rip_output(m, inp);
                    655:                if (nam)
                    656:                        rip_disconnect(inp);
1.28      mycroft   657:        }
1.13      mycroft   658:                break;
                    659:
                    660:        case PRU_SENSE:
                    661:                /*
                    662:                 * stat: don't bother with a blocksize.
                    663:                 */
1.27      mycroft   664:                splx(s);
1.1       cgd       665:                return (0);
1.13      mycroft   666:
                    667:        case PRU_RCVOOB:
1.27      mycroft   668:                error = EOPNOTSUPP;
                    669:                break;
                    670:
1.13      mycroft   671:        case PRU_SENDOOB:
1.28      mycroft   672:                m_freem(control);
1.27      mycroft   673:                m_freem(m);
1.13      mycroft   674:                error = EOPNOTSUPP;
                    675:                break;
                    676:
                    677:        case PRU_SOCKADDR:
                    678:                in_setsockaddr(inp, nam);
                    679:                break;
                    680:
                    681:        case PRU_PEERADDR:
                    682:                in_setpeeraddr(inp, nam);
                    683:                break;
                    684:
                    685:        default:
                    686:                panic("rip_usrreq");
1.1       cgd       687:        }
1.27      mycroft   688:
1.22      pk        689: release:
1.27      mycroft   690:        splx(s);
1.1       cgd       691:        return (error);
                    692: }
1.84      atatat    693:
1.110     pooka     694: static void
                    695: sysctl_net_inet_raw_setup(struct sysctllog **clog)
1.84      atatat    696: {
                    697:
                    698:        sysctl_createv(clog, 0, NULL, NULL,
                    699:                       CTLFLAG_PERMANENT,
                    700:                       CTLTYPE_NODE, "net", NULL,
                    701:                       NULL, 0, NULL, 0,
                    702:                       CTL_NET, CTL_EOL);
                    703:        sysctl_createv(clog, 0, NULL, NULL,
                    704:                       CTLFLAG_PERMANENT,
                    705:                       CTLTYPE_NODE, "inet", NULL,
                    706:                       NULL, 0, NULL, 0,
                    707:                       CTL_NET, PF_INET, CTL_EOL);
                    708:        sysctl_createv(clog, 0, NULL, NULL,
                    709:                       CTLFLAG_PERMANENT,
                    710:                       CTLTYPE_NODE, "raw",
                    711:                       SYSCTL_DESCR("Raw IPv4 settings"),
                    712:                       NULL, 0, NULL, 0,
                    713:                       CTL_NET, PF_INET, IPPROTO_RAW, CTL_EOL);
                    714:
                    715:        sysctl_createv(clog, 0, NULL, NULL,
                    716:                       CTLFLAG_PERMANENT,
1.86      atatat    717:                       CTLTYPE_STRUCT, "pcblist",
1.84      atatat    718:                       SYSCTL_DESCR("Raw IPv4 control block list"),
                    719:                       sysctl_inpcblist, 0, &rawcbtable, 0,
                    720:                       CTL_NET, PF_INET, IPPROTO_RAW,
                    721:                       CTL_CREATE, CTL_EOL);
                    722: }

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