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Annotation of src/sys/netinet/raw_ip.c, Revision 1.123

1.123   ! rmind       1: /*     $NetBSD: raw_ip.c,v 1.122 2014/05/20 19:04:00 rmind 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:
1.121     rmind      63: /*
                     64:  * Raw interface to IP protocol.
                     65:  */
                     66:
1.59      lukem      67: #include <sys/cdefs.h>
1.123   ! rmind      68: __KERNEL_RCSID(0, "$NetBSD: raw_ip.c,v 1.122 2014/05/20 19:04:00 rmind Exp $");
1.40      scottr     69:
1.78      jonathan   70: #include "opt_inet.h"
1.109     christos   71: #include "opt_compat_netbsd.h"
1.45      thorpej    72: #include "opt_ipsec.h"
1.40      scottr     73: #include "opt_mrouting.h"
1.1       cgd        74:
1.7       mycroft    75: #include <sys/param.h>
1.84      atatat     76: #include <sys/sysctl.h>
1.7       mycroft    77: #include <sys/malloc.h>
                     78: #include <sys/mbuf.h>
                     79: #include <sys/socket.h>
                     80: #include <sys/protosw.h>
                     81: #include <sys/socketvar.h>
                     82: #include <sys/errno.h>
1.13      mycroft    83: #include <sys/systm.h>
1.26      mycroft    84: #include <sys/proc.h>
1.89      elad       85: #include <sys/kauth.h>
1.1       cgd        86:
1.7       mycroft    87: #include <net/if.h>
                     88: #include <net/route.h>
1.1       cgd        89:
1.7       mycroft    90: #include <netinet/in.h>
                     91: #include <netinet/in_systm.h>
                     92: #include <netinet/ip.h>
                     93: #include <netinet/ip_var.h>
1.105     thorpej    94: #include <netinet/ip_private.h>
1.13      mycroft    95: #include <netinet/ip_mroute.h>
1.44      darrenr    96: #include <netinet/ip_icmp.h>
1.7       mycroft    97: #include <netinet/in_pcb.h>
1.87      yamt       98: #include <netinet/in_proto.h>
1.24      christos   99: #include <netinet/in_var.h>
                    100:
1.116     christos  101: #ifdef IPSEC
1.72      jonathan  102: #include <netipsec/ipsec.h>
1.106     thorpej   103: #include <netipsec/ipsec_var.h>
                    104: #include <netipsec/ipsec_private.h>
1.116     christos  105: #endif /* IPSEC */
1.72      jonathan  106:
1.109     christos  107: #ifdef COMPAT_50
                    108: #include <compat/sys/socket.h>
                    109: #endif
                    110:
1.20      mycroft   111: struct inpcbtable rawcbtable;
1.30      pk        112:
1.82      perry     113: int     rip_pcbnotify(struct inpcbtable *, struct in_addr,
                    114:     struct in_addr, int, int, void (*)(struct inpcb *, int));
                    115: int     rip_bind(struct inpcb *, struct mbuf *);
                    116: int     rip_connect(struct inpcb *, struct mbuf *);
                    117: void    rip_disconnect(struct inpcb *);
1.13      mycroft   118:
1.110     pooka     119: static void sysctl_net_inet_raw_setup(struct sysctllog **);
                    120:
1.13      mycroft   121: /*
                    122:  * Nominal space allocated to a raw ip socket.
                    123:  */
                    124: #define        RIPSNDQ         8192
                    125: #define        RIPRCVQ         8192
1.1       cgd       126:
1.121     rmind     127: static u_long          rip_sendspace = RIPSNDQ;
                    128: static u_long          rip_recvspace = RIPRCVQ;
                    129:
1.1       cgd       130: /*
                    131:  * Raw interface to IP protocol.
                    132:  */
1.13      mycroft   133:
                    134: /*
                    135:  * Initialize raw connection block q.
                    136:  */
                    137: void
1.83      perry     138: rip_init(void)
1.13      mycroft   139: {
                    140:
1.110     pooka     141:        sysctl_net_inet_raw_setup(NULL);
1.33      mycroft   142:        in_pcbinit(&rawcbtable, 1, 1);
1.13      mycroft   143: }
                    144:
1.100     dyoung    145: static void
                    146: rip_sbappendaddr(struct inpcb *last, struct ip *ip, const struct sockaddr *sa,
                    147:     int hlen, struct mbuf *opts, struct mbuf *n)
                    148: {
                    149:        if (last->inp_flags & INP_NOHEADER)
                    150:                m_adj(n, hlen);
1.109     christos  151:        if (last->inp_flags & INP_CONTROLOPTS
                    152: #ifdef SO_OTIMESTAMP
                    153:            || last->inp_socket->so_options & SO_OTIMESTAMP
                    154: #endif
                    155:            || last->inp_socket->so_options & SO_TIMESTAMP)
1.100     dyoung    156:                ip_savecontrol(last, &opts, ip, n);
                    157:        if (sbappendaddr(&last->inp_socket->so_rcv, sa, n, opts) == 0) {
                    158:                /* should notify about lost packet */
                    159:                m_freem(n);
                    160:                if (opts)
                    161:                        m_freem(opts);
                    162:        } else
                    163:                sorwakeup(last->inp_socket);
                    164: }
                    165:
1.1       cgd       166: /*
                    167:  * Setup generic address and protocol structures
                    168:  * for raw_input routine, then pass them along with
                    169:  * mbuf chain.
                    170:  */
1.9       mycroft   171: void
1.24      christos  172: rip_input(struct mbuf *m, ...)
1.1       cgd       173: {
1.100     dyoung    174:        int hlen, proto;
1.53      augustss  175:        struct ip *ip = mtod(m, struct ip *);
1.75      itojun    176:        struct inpcb_hdr *inph;
1.53      augustss  177:        struct inpcb *inp;
1.97      dyoung    178:        struct inpcb *last = NULL;
                    179:        struct mbuf *n, *opts = NULL;
1.32      mycroft   180:        struct sockaddr_in ripsrc;
1.43      itojun    181:        va_list ap;
                    182:
                    183:        va_start(ap, m);
1.64      simonb    184:        (void)va_arg(ap, int);          /* ignore value, advance ap */
1.43      itojun    185:        proto = va_arg(ap, int);
                    186:        va_end(ap);
1.1       cgd       187:
1.97      dyoung    188:        sockaddr_in_init(&ripsrc, &ip->ip_src, 0);
1.42      thorpej   189:
                    190:        /*
                    191:         * XXX Compatibility: programs using raw IP expect ip_len
1.62      itojun    192:         * XXX to have the header length subtracted, and in host order.
                    193:         * XXX ip_off is also expected to be host order.
1.42      thorpej   194:         */
1.100     dyoung    195:        hlen = ip->ip_hl << 2;
                    196:        ip->ip_len = ntohs(ip->ip_len) - hlen;
1.62      itojun    197:        NTOHS(ip->ip_off);
1.32      mycroft   198:
1.117     christos  199:        TAILQ_FOREACH(inph, &rawcbtable.inpt_queue, inph_queue) {
1.75      itojun    200:                inp = (struct inpcb *)inph;
                    201:                if (inp->inp_af != AF_INET)
                    202:                        continue;
1.43      itojun    203:                if (inp->inp_ip.ip_p && inp->inp_ip.ip_p != proto)
1.13      mycroft   204:                        continue;
1.32      mycroft   205:                if (!in_nullhost(inp->inp_laddr) &&
                    206:                    !in_hosteq(inp->inp_laddr, ip->ip_dst))
1.13      mycroft   207:                        continue;
1.32      mycroft   208:                if (!in_nullhost(inp->inp_faddr) &&
                    209:                    !in_hosteq(inp->inp_faddr, ip->ip_src))
1.13      mycroft   210:                        continue;
1.97      dyoung    211:                if (last == NULL)
                    212:                        ;
1.116     christos  213: #if defined(IPSEC)
1.97      dyoung    214:                /* check AH/ESP integrity. */
                    215:                else if (ipsec4_in_reject_so(m, last->inp_socket)) {
1.106     thorpej   216:                        IPSEC_STATINC(IPSEC_STAT_IN_POLVIO);
1.97      dyoung    217:                        /* do not inject data to pcb */
                    218:                }
                    219: #endif /*IPSEC*/
1.99      dyoung    220:                else if ((n = m_copypacket(m, M_DONTWAIT)) != NULL) {
1.100     dyoung    221:                        rip_sbappendaddr(last, ip, sintosa(&ripsrc), hlen, opts,
                    222:                            n);
1.97      dyoung    223:                        opts = NULL;
1.13      mycroft   224:                }
1.36      thorpej   225:                last = inp;
1.13      mycroft   226:        }
1.116     christos  227: #if defined(IPSEC)
1.55      itojun    228:        /* check AH/ESP integrity. */
1.97      dyoung    229:        if (last != NULL && ipsec4_in_reject_so(m, last->inp_socket)) {
1.55      itojun    230:                m_freem(m);
1.106     thorpej   231:                IPSEC_STATINC(IPSEC_STAT_IN_POLVIO);
1.105     thorpej   232:                IP_STATDEC(IP_STAT_DELIVERED);
1.55      itojun    233:                /* do not inject data to pcb */
                    234:        } else
                    235: #endif /*IPSEC*/
1.100     dyoung    236:        if (last != NULL)
                    237:                rip_sbappendaddr(last, ip, sintosa(&ripsrc), hlen, opts, m);
                    238:        else if (inetsw[ip_protox[ip->ip_p]].pr_input == rip_input) {
1.105     thorpej   239:                uint64_t *ips;
                    240:
1.97      dyoung    241:                icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PROTOCOL,
                    242:                    0, 0);
1.105     thorpej   243:                ips = IP_STAT_GETREF();
                    244:                ips[IP_STAT_NOPROTO]++;
                    245:                ips[IP_STAT_DELIVERED]--;
                    246:                IP_STAT_PUTREF();
1.97      dyoung    247:        } else
                    248:                m_freem(m);
1.43      itojun    249:        return;
1.60      itojun    250: }
                    251:
                    252: int
1.83      perry     253: rip_pcbnotify(struct inpcbtable *table,
                    254:     struct in_addr faddr, struct in_addr laddr, int proto, int errno,
                    255:     void (*notify)(struct inpcb *, int))
1.60      itojun    256: {
1.117     christos  257:        struct inpcb_hdr *inph, *ninph;
1.60      itojun    258:        int nmatch;
                    259:
                    260:        nmatch = 0;
1.117     christos  261:        TAILQ_FOREACH_SAFE(inph, &table->inpt_queue, inph_queue, ninph) {
                    262:                struct inpcb *inp = (struct inpcb *)inph;
1.75      itojun    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:        }
1.123   ! rmind     384:
        !           385:        /*
        !           386:         * IP output.  Note: if IP_RETURNMTU flag is set, the MTU size
        !           387:         * will be stored in inp_errormtu.
        !           388:         */
        !           389:        return ip_output(m, opts, &inp->inp_route, flags, inp->inp_moptions,
        !           390:             inp->inp_socket);
1.1       cgd       391: }
                    392:
                    393: /*
                    394:  * Raw IP socket option processing.
                    395:  */
1.9       mycroft   396: int
1.108     plunky    397: rip_ctloutput(int op, struct socket *so, struct sockopt *sopt)
1.1       cgd       398: {
1.53      augustss  399:        struct inpcb *inp = sotoinpcb(so);
1.31      mycroft   400:        int error = 0;
1.108     plunky    401:        int optval;
1.1       cgd       402:
1.108     plunky    403:        if (sopt->sopt_level == SOL_SOCKET && sopt->sopt_name == SO_NOHEADER) {
1.100     dyoung    404:                if (op == PRCO_GETOPT) {
1.108     plunky    405:                        optval = (inp->inp_flags & INP_NOHEADER) ? 1 : 0;
                    406:                        error = sockopt_set(sopt, &optval, sizeof(optval));
                    407:                } else if (op == PRCO_SETOPT) {
                    408:                        error = sockopt_getint(sopt, &optval);
                    409:                        if (error)
                    410:                                goto out;
                    411:                        if (optval) {
                    412:                                inp->inp_flags &= ~INP_HDRINCL;
                    413:                                inp->inp_flags |= INP_NOHEADER;
                    414:                        } else
                    415:                                inp->inp_flags &= ~INP_NOHEADER;
                    416:                }
                    417:                goto out;
                    418:        } else if (sopt->sopt_level != IPPROTO_IP)
                    419:                return ip_ctloutput(op, so, sopt);
1.100     dyoung    420:
                    421:        switch (op) {
1.31      mycroft   422:
                    423:        case PRCO_SETOPT:
1.108     plunky    424:                switch (sopt->sopt_name) {
1.31      mycroft   425:                case IP_HDRINCL:
1.108     plunky    426:                        error = sockopt_getint(sopt, &optval);
                    427:                        if (error)
                    428:                                break;
                    429:                        if (optval)
1.100     dyoung    430:                                inp->inp_flags |= INP_HDRINCL;
                    431:                        else
                    432:                                inp->inp_flags &= ~INP_HDRINCL;
1.108     plunky    433:                        break;
1.31      mycroft   434:
                    435: #ifdef MROUTING
                    436:                case MRT_INIT:
                    437:                case MRT_DONE:
                    438:                case MRT_ADD_VIF:
                    439:                case MRT_DEL_VIF:
                    440:                case MRT_ADD_MFC:
                    441:                case MRT_DEL_MFC:
                    442:                case MRT_ASSERT:
1.81      manu      443:                case MRT_API_CONFIG:
                    444:                case MRT_ADD_BW_UPCALL:
                    445:                case MRT_DEL_BW_UPCALL:
1.108     plunky    446:                        error = ip_mrouter_set(so, sopt);
1.31      mycroft   447:                        break;
                    448: #endif
                    449:
                    450:                default:
1.108     plunky    451:                        error = ip_ctloutput(op, so, sopt);
1.31      mycroft   452:                        break;
1.13      mycroft   453:                }
                    454:                break;
1.1       cgd       455:
1.31      mycroft   456:        case PRCO_GETOPT:
1.108     plunky    457:                switch (sopt->sopt_name) {
1.31      mycroft   458:                case IP_HDRINCL:
1.108     plunky    459:                        optval = inp->inp_flags & INP_HDRINCL;
                    460:                        error = sockopt_set(sopt, &optval, sizeof(optval));
1.31      mycroft   461:                        break;
                    462:
1.6       hpeyerl   463: #ifdef MROUTING
1.31      mycroft   464:                case MRT_VERSION:
                    465:                case MRT_ASSERT:
1.81      manu      466:                case MRT_API_SUPPORT:
                    467:                case MRT_API_CONFIG:
1.108     plunky    468:                        error = ip_mrouter_get(so, sopt);
1.18      mycroft   469:                        break;
1.31      mycroft   470: #endif
                    471:
1.18      mycroft   472:                default:
1.108     plunky    473:                        error = ip_ctloutput(op, so, sopt);
1.18      mycroft   474:                        break;
                    475:                }
1.31      mycroft   476:                break;
1.1       cgd       477:        }
1.108     plunky    478:  out:
1.100     dyoung    479:        return error;
1.1       cgd       480: }
                    481:
1.27      mycroft   482: int
1.83      perry     483: rip_bind(struct inpcb *inp, struct mbuf *nam)
1.29      mycroft   484: {
                    485:        struct sockaddr_in *addr = mtod(nam, struct sockaddr_in *);
                    486:
                    487:        if (nam->m_len != sizeof(*addr))
                    488:                return (EINVAL);
1.119     rmind     489:        if (!IFNET_FIRST())
1.29      mycroft   490:                return (EADDRNOTAVAIL);
1.115     joerg     491:        if (addr->sin_family != AF_INET)
1.29      mycroft   492:                return (EAFNOSUPPORT);
1.32      mycroft   493:        if (!in_nullhost(addr->sin_addr) &&
1.29      mycroft   494:            ifa_ifwithaddr(sintosa(addr)) == 0)
                    495:                return (EADDRNOTAVAIL);
                    496:        inp->inp_laddr = addr->sin_addr;
                    497:        return (0);
                    498: }
                    499:
                    500: int
1.83      perry     501: rip_connect(struct inpcb *inp, struct mbuf *nam)
1.27      mycroft   502: {
                    503:        struct sockaddr_in *addr = mtod(nam, struct sockaddr_in *);
                    504:
                    505:        if (nam->m_len != sizeof(*addr))
                    506:                return (EINVAL);
1.119     rmind     507:        if (!IFNET_FIRST())
1.27      mycroft   508:                return (EADDRNOTAVAIL);
1.115     joerg     509:        if (addr->sin_family != AF_INET)
1.27      mycroft   510:                return (EAFNOSUPPORT);
                    511:        inp->inp_faddr = addr->sin_addr;
                    512:        return (0);
                    513: }
                    514:
                    515: void
1.83      perry     516: rip_disconnect(struct inpcb *inp)
1.27      mycroft   517: {
                    518:
1.32      mycroft   519:        inp->inp_faddr = zeroin_addr;
1.27      mycroft   520: }
                    521:
1.121     rmind     522: static int
                    523: rip_attach(struct socket *so, int proto)
                    524: {
                    525:        struct inpcb *inp;
                    526:        int error;
                    527:
                    528:        KASSERT(sotoinpcb(so) == NULL);
                    529:        sosetlock(so);
                    530:
                    531:        if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
                    532:                error = soreserve(so, rip_sendspace, rip_recvspace);
                    533:                if (error) {
                    534:                        return error;
                    535:                }
                    536:        }
                    537:
                    538:        error = in_pcballoc(so, &rawcbtable);
                    539:        if (error) {
                    540:                return error;
                    541:        }
                    542:        inp = sotoinpcb(so);
                    543:        inp->inp_ip.ip_p = proto;
                    544:        KASSERT(solocked(so));
                    545:
                    546:        return 0;
                    547: }
1.13      mycroft   548:
1.121     rmind     549: static void
                    550: rip_detach(struct socket *so)
1.1       cgd       551: {
1.53      augustss  552:        struct inpcb *inp;
1.121     rmind     553:
                    554:        KASSERT(solocked(so));
                    555:        inp = sotoinpcb(so);
                    556:        KASSERT(inp != NULL);
                    557:
1.13      mycroft   558: #ifdef MROUTING
1.6       hpeyerl   559:        extern struct socket *ip_mrouter;
1.121     rmind     560:        if (so == ip_mrouter) {
                    561:                ip_mrouter_done();
                    562:        }
1.6       hpeyerl   563: #endif
1.121     rmind     564:        in_pcbdetach(inp);
                    565: }
                    566:
                    567: int
                    568: rip_usrreq(struct socket *so, int req, struct mbuf *m, struct mbuf *nam,
                    569:     struct mbuf *control, struct lwp *l)
                    570: {
                    571:        struct inpcb *inp;
                    572:        int s, error = 0;
1.27      mycroft   573:
1.121     rmind     574:        KASSERT(req != PRU_ATTACH);
                    575:        KASSERT(req != PRU_DETACH);
1.49      thorpej   576:
1.121     rmind     577:        if (req == PRU_CONTROL) {
                    578:                return in_control(so, (long)m, nam, (ifnet_t *)control, l);
                    579:        }
1.93      tls       580:        s = splsoftnet();
1.50      thorpej   581:        if (req == PRU_PURGEIF) {
1.107     ad        582:                mutex_enter(softnet_lock);
1.56      itojun    583:                in_pcbpurgeif0(&rawcbtable, (struct ifnet *)control);
1.50      thorpej   584:                in_purgeif((struct ifnet *)control);
                    585:                in_pcbpurgeif(&rawcbtable, (struct ifnet *)control);
1.107     ad        586:                mutex_exit(softnet_lock);
1.93      tls       587:                splx(s);
1.121     rmind     588:                return 0;
1.49      thorpej   589:        }
1.22      pk        590:
1.121     rmind     591:        KASSERT(solocked(so));
1.27      mycroft   592:        inp = sotoinpcb(so);
1.121     rmind     593:
                    594:        KASSERT(!control || (req == PRU_SEND || req == PRU_SENDOOB));
                    595:        if (inp == NULL) {
                    596:                splx(s);
                    597:                return EINVAL;
1.22      pk        598:        }
                    599:
1.1       cgd       600:        switch (req) {
                    601:
                    602:        case PRU_BIND:
1.29      mycroft   603:                error = rip_bind(inp, nam);
1.27      mycroft   604:                break;
                    605:
                    606:        case PRU_LISTEN:
                    607:                error = EOPNOTSUPP;
                    608:                break;
                    609:
                    610:        case PRU_CONNECT:
                    611:                error = rip_connect(inp, nam);
                    612:                if (error)
1.13      mycroft   613:                        break;
1.1       cgd       614:                soisconnected(so);
1.13      mycroft   615:                break;
                    616:
                    617:        case PRU_CONNECT2:
                    618:                error = EOPNOTSUPP;
                    619:                break;
                    620:
1.27      mycroft   621:        case PRU_DISCONNECT:
                    622:                soisdisconnected(so);
                    623:                rip_disconnect(inp);
                    624:                break;
                    625:
1.13      mycroft   626:        /*
                    627:         * Mark the connection as being incapable of further input.
                    628:         */
                    629:        case PRU_SHUTDOWN:
                    630:                socantsendmore(so);
                    631:                break;
                    632:
1.27      mycroft   633:        case PRU_RCVD:
                    634:                error = EOPNOTSUPP;
                    635:                break;
                    636:
1.13      mycroft   637:        /*
                    638:         * Ship a packet out.  The appropriate raw output
                    639:         * routine handles any massaging necessary.
                    640:         */
                    641:        case PRU_SEND:
1.28      mycroft   642:                if (control && control->m_len) {
                    643:                        m_freem(control);
                    644:                        m_freem(m);
                    645:                        error = EINVAL;
                    646:                        break;
                    647:                }
                    648:        {
1.27      mycroft   649:                if (nam) {
                    650:                        if ((so->so_state & SS_ISCONNECTED) != 0) {
1.13      mycroft   651:                                error = EISCONN;
1.28      mycroft   652:                                goto die;
1.13      mycroft   653:                        }
1.27      mycroft   654:                        error = rip_connect(inp, nam);
                    655:                        if (error) {
1.28      mycroft   656:                        die:
1.27      mycroft   657:                                m_freem(m);
                    658:                                break;
                    659:                        }
1.13      mycroft   660:                } else {
1.27      mycroft   661:                        if ((so->so_state & SS_ISCONNECTED) == 0) {
1.13      mycroft   662:                                error = ENOTCONN;
1.28      mycroft   663:                                goto die;
1.13      mycroft   664:                        }
                    665:                }
1.27      mycroft   666:                error = rip_output(m, inp);
                    667:                if (nam)
                    668:                        rip_disconnect(inp);
1.28      mycroft   669:        }
1.13      mycroft   670:                break;
                    671:
                    672:        case PRU_SENSE:
                    673:                /*
                    674:                 * stat: don't bother with a blocksize.
                    675:                 */
1.27      mycroft   676:                splx(s);
1.1       cgd       677:                return (0);
1.13      mycroft   678:
                    679:        case PRU_RCVOOB:
1.27      mycroft   680:                error = EOPNOTSUPP;
                    681:                break;
                    682:
1.13      mycroft   683:        case PRU_SENDOOB:
1.28      mycroft   684:                m_freem(control);
1.27      mycroft   685:                m_freem(m);
1.13      mycroft   686:                error = EOPNOTSUPP;
                    687:                break;
                    688:
                    689:        case PRU_SOCKADDR:
                    690:                in_setsockaddr(inp, nam);
                    691:                break;
                    692:
                    693:        case PRU_PEERADDR:
                    694:                in_setpeeraddr(inp, nam);
                    695:                break;
                    696:
                    697:        default:
                    698:                panic("rip_usrreq");
1.1       cgd       699:        }
1.121     rmind     700:        splx(s);
1.27      mycroft   701:
1.121     rmind     702:        return error;
1.1       cgd       703: }
1.84      atatat    704:
1.122     rmind     705: PR_WRAP_USRREQS(rip)
                    706: #define        rip_attach      rip_attach_wrapper
                    707: #define        rip_detach      rip_detach_wrapper
1.120     rmind     708: #define        rip_usrreq      rip_usrreq_wrapper
                    709:
                    710: const struct pr_usrreqs rip_usrreqs = {
1.121     rmind     711:        .pr_attach      = rip_attach,
                    712:        .pr_detach      = rip_detach,
1.120     rmind     713:        .pr_generic     = rip_usrreq,
                    714: };
                    715:
1.110     pooka     716: static void
                    717: sysctl_net_inet_raw_setup(struct sysctllog **clog)
1.84      atatat    718: {
                    719:
                    720:        sysctl_createv(clog, 0, NULL, NULL,
                    721:                       CTLFLAG_PERMANENT,
                    722:                       CTLTYPE_NODE, "inet", NULL,
                    723:                       NULL, 0, NULL, 0,
                    724:                       CTL_NET, PF_INET, CTL_EOL);
                    725:        sysctl_createv(clog, 0, NULL, NULL,
                    726:                       CTLFLAG_PERMANENT,
                    727:                       CTLTYPE_NODE, "raw",
                    728:                       SYSCTL_DESCR("Raw IPv4 settings"),
                    729:                       NULL, 0, NULL, 0,
                    730:                       CTL_NET, PF_INET, IPPROTO_RAW, CTL_EOL);
                    731:
                    732:        sysctl_createv(clog, 0, NULL, NULL,
                    733:                       CTLFLAG_PERMANENT,
1.86      atatat    734:                       CTLTYPE_STRUCT, "pcblist",
1.84      atatat    735:                       SYSCTL_DESCR("Raw IPv4 control block list"),
                    736:                       sysctl_inpcblist, 0, &rawcbtable, 0,
                    737:                       CTL_NET, PF_INET, IPPROTO_RAW,
                    738:                       CTL_CREATE, CTL_EOL);
                    739: }

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