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Annotation of src/sys/netinet/raw_ip.c, Revision 1.124

1.124   ! christos    1: /*     $NetBSD: raw_ip.c,v 1.123 2014/05/22 23:42:53 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>
1.124   ! christos   68: __KERNEL_RCSID(0, "$NetBSD: raw_ip.c,v 1.123 2014/05/22 23:42:53 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. */
1.124   ! christos  215:                else if (ipsec_used &&
        !           216:                    ipsec4_in_reject_so(m, last->inp_socket)) {
1.106     thorpej   217:                        IPSEC_STATINC(IPSEC_STAT_IN_POLVIO);
1.97      dyoung    218:                        /* do not inject data to pcb */
                    219:                }
                    220: #endif /*IPSEC*/
1.99      dyoung    221:                else if ((n = m_copypacket(m, M_DONTWAIT)) != NULL) {
1.100     dyoung    222:                        rip_sbappendaddr(last, ip, sintosa(&ripsrc), hlen, opts,
                    223:                            n);
1.97      dyoung    224:                        opts = NULL;
1.13      mycroft   225:                }
1.36      thorpej   226:                last = inp;
1.13      mycroft   227:        }
1.116     christos  228: #if defined(IPSEC)
1.55      itojun    229:        /* check AH/ESP integrity. */
1.124   ! christos  230:        if (ipsec_used && last != NULL
        !           231:            && ipsec4_in_reject_so(m, last->inp_socket)) {
1.55      itojun    232:                m_freem(m);
1.106     thorpej   233:                IPSEC_STATINC(IPSEC_STAT_IN_POLVIO);
1.105     thorpej   234:                IP_STATDEC(IP_STAT_DELIVERED);
1.55      itojun    235:                /* do not inject data to pcb */
                    236:        } else
                    237: #endif /*IPSEC*/
1.100     dyoung    238:        if (last != NULL)
                    239:                rip_sbappendaddr(last, ip, sintosa(&ripsrc), hlen, opts, m);
                    240:        else if (inetsw[ip_protox[ip->ip_p]].pr_input == rip_input) {
1.105     thorpej   241:                uint64_t *ips;
                    242:
1.97      dyoung    243:                icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PROTOCOL,
                    244:                    0, 0);
1.105     thorpej   245:                ips = IP_STAT_GETREF();
                    246:                ips[IP_STAT_NOPROTO]++;
                    247:                ips[IP_STAT_DELIVERED]--;
                    248:                IP_STAT_PUTREF();
1.97      dyoung    249:        } else
                    250:                m_freem(m);
1.43      itojun    251:        return;
1.60      itojun    252: }
                    253:
                    254: int
1.83      perry     255: rip_pcbnotify(struct inpcbtable *table,
                    256:     struct in_addr faddr, struct in_addr laddr, int proto, int errno,
                    257:     void (*notify)(struct inpcb *, int))
1.60      itojun    258: {
1.117     christos  259:        struct inpcb_hdr *inph, *ninph;
1.60      itojun    260:        int nmatch;
                    261:
                    262:        nmatch = 0;
1.117     christos  263:        TAILQ_FOREACH_SAFE(inph, &table->inpt_queue, inph_queue, ninph) {
                    264:                struct inpcb *inp = (struct inpcb *)inph;
1.75      itojun    265:                if (inp->inp_af != AF_INET)
                    266:                        continue;
1.60      itojun    267:                if (inp->inp_ip.ip_p && inp->inp_ip.ip_p != proto)
                    268:                        continue;
                    269:                if (in_hosteq(inp->inp_faddr, faddr) &&
                    270:                    in_hosteq(inp->inp_laddr, laddr)) {
                    271:                        (*notify)(inp, errno);
                    272:                        nmatch++;
                    273:                }
                    274:        }
                    275:
                    276:        return nmatch;
                    277: }
                    278:
                    279: void *
1.95      dyoung    280: rip_ctlinput(int cmd, const struct sockaddr *sa, void *v)
1.60      itojun    281: {
                    282:        struct ip *ip = v;
1.82      perry     283:        void (*notify)(struct inpcb *, int) = in_rtchange;
1.60      itojun    284:        int errno;
                    285:
                    286:        if (sa->sa_family != AF_INET ||
                    287:            sa->sa_len != sizeof(struct sockaddr_in))
                    288:                return NULL;
                    289:        if ((unsigned)cmd >= PRC_NCMDS)
                    290:                return NULL;
                    291:        errno = inetctlerrmap[cmd];
                    292:        if (PRC_IS_REDIRECT(cmd))
                    293:                notify = in_rtchange, ip = 0;
                    294:        else if (cmd == PRC_HOSTDEAD)
                    295:                ip = 0;
                    296:        else if (errno == 0)
                    297:                return NULL;
                    298:        if (ip) {
1.95      dyoung    299:                rip_pcbnotify(&rawcbtable, satocsin(sa)->sin_addr,
1.60      itojun    300:                    ip->ip_src, ip->ip_p, errno, notify);
                    301:
                    302:                /* XXX mapped address case */
                    303:        } else
1.95      dyoung    304:                in_pcbnotifyall(&rawcbtable, satocsin(sa)->sin_addr, errno,
1.60      itojun    305:                    notify);
                    306:        return NULL;
1.1       cgd       307: }
                    308:
                    309: /*
                    310:  * Generate IP header and pass packet to ip_output.
                    311:  * Tack on options user may have setup with control call.
                    312:  */
1.9       mycroft   313: int
1.24      christos  314: rip_output(struct mbuf *m, ...)
                    315: {
1.53      augustss  316:        struct inpcb *inp;
                    317:        struct ip *ip;
1.10      mycroft   318:        struct mbuf *opts;
1.24      christos  319:        int flags;
                    320:        va_list ap;
                    321:
                    322:        va_start(ap, m);
1.27      mycroft   323:        inp = va_arg(ap, struct inpcb *);
1.24      christos  324:        va_end(ap);
                    325:
1.27      mycroft   326:        flags =
1.37      matt      327:            (inp->inp_socket->so_options & SO_DONTROUTE) | IP_ALLOWBROADCAST
                    328:            | IP_RETURNMTU;
1.1       cgd       329:
                    330:        /*
                    331:         * If the user handed us a complete IP packet, use it.
                    332:         * Otherwise, allocate an mbuf for a header and fill it in.
                    333:         */
1.13      mycroft   334:        if ((inp->inp_flags & INP_HDRINCL) == 0) {
1.35      thorpej   335:                if ((m->m_pkthdr.len + sizeof(struct ip)) > IP_MAXPACKET) {
                    336:                        m_freem(m);
                    337:                        return (EMSGSIZE);
                    338:                }
1.68      itojun    339:                M_PREPEND(m, sizeof(struct ip), M_DONTWAIT);
                    340:                if (!m)
                    341:                        return (ENOBUFS);
1.1       cgd       342:                ip = mtod(m, struct ip *);
                    343:                ip->ip_tos = 0;
1.62      itojun    344:                ip->ip_off = htons(0);
1.13      mycroft   345:                ip->ip_p = inp->inp_ip.ip_p;
1.62      itojun    346:                ip->ip_len = htons(m->m_pkthdr.len);
1.13      mycroft   347:                ip->ip_src = inp->inp_laddr;
1.27      mycroft   348:                ip->ip_dst = inp->inp_faddr;
1.1       cgd       349:                ip->ip_ttl = MAXTTL;
1.13      mycroft   350:                opts = inp->inp_options;
                    351:        } else {
1.35      thorpej   352:                if (m->m_pkthdr.len > IP_MAXPACKET) {
                    353:                        m_freem(m);
                    354:                        return (EMSGSIZE);
                    355:                }
1.13      mycroft   356:                ip = mtod(m, struct ip *);
1.65      thorpej   357:
                    358:                /*
                    359:                 * If the mbuf is read-only, we need to allocate
                    360:                 * a new mbuf for the header, since we need to
                    361:                 * modify the header.
                    362:                 */
                    363:                if (M_READONLY(m)) {
                    364:                        int hlen = ip->ip_hl << 2;
                    365:
                    366:                        m = m_copyup(m, hlen, (max_linkhdr + 3) & ~3);
                    367:                        if (m == NULL)
                    368:                                return (ENOMEM);        /* XXX */
                    369:                        ip = mtod(m, struct ip *);
                    370:                }
                    371:
1.62      itojun    372:                /* XXX userland passes ip_len and ip_off in host order */
1.38      mycroft   373:                if (m->m_pkthdr.len != ip->ip_len) {
                    374:                        m_freem(m);
                    375:                        return (EINVAL);
                    376:                }
1.62      itojun    377:                HTONS(ip->ip_len);
                    378:                HTONS(ip->ip_off);
1.103     matt      379:                if (ip->ip_id != 0 || m->m_pkthdr.len < IP_MINFRAGSIZE)
                    380:                        flags |= IP_NOIPNEWID;
1.13      mycroft   381:                opts = NULL;
                    382:                /* XXX prevent ip_output from overwriting header fields */
                    383:                flags |= IP_RAWOUTPUT;
1.105     thorpej   384:                IP_STATINC(IP_STAT_RAWOUT);
1.1       cgd       385:        }
1.123     rmind     386:
                    387:        /*
                    388:         * IP output.  Note: if IP_RETURNMTU flag is set, the MTU size
                    389:         * will be stored in inp_errormtu.
                    390:         */
                    391:        return ip_output(m, opts, &inp->inp_route, flags, inp->inp_moptions,
                    392:             inp->inp_socket);
1.1       cgd       393: }
                    394:
                    395: /*
                    396:  * Raw IP socket option processing.
                    397:  */
1.9       mycroft   398: int
1.108     plunky    399: rip_ctloutput(int op, struct socket *so, struct sockopt *sopt)
1.1       cgd       400: {
1.53      augustss  401:        struct inpcb *inp = sotoinpcb(so);
1.31      mycroft   402:        int error = 0;
1.108     plunky    403:        int optval;
1.1       cgd       404:
1.108     plunky    405:        if (sopt->sopt_level == SOL_SOCKET && sopt->sopt_name == SO_NOHEADER) {
1.100     dyoung    406:                if (op == PRCO_GETOPT) {
1.108     plunky    407:                        optval = (inp->inp_flags & INP_NOHEADER) ? 1 : 0;
                    408:                        error = sockopt_set(sopt, &optval, sizeof(optval));
                    409:                } else if (op == PRCO_SETOPT) {
                    410:                        error = sockopt_getint(sopt, &optval);
                    411:                        if (error)
                    412:                                goto out;
                    413:                        if (optval) {
                    414:                                inp->inp_flags &= ~INP_HDRINCL;
                    415:                                inp->inp_flags |= INP_NOHEADER;
                    416:                        } else
                    417:                                inp->inp_flags &= ~INP_NOHEADER;
                    418:                }
                    419:                goto out;
                    420:        } else if (sopt->sopt_level != IPPROTO_IP)
                    421:                return ip_ctloutput(op, so, sopt);
1.100     dyoung    422:
                    423:        switch (op) {
1.31      mycroft   424:
                    425:        case PRCO_SETOPT:
1.108     plunky    426:                switch (sopt->sopt_name) {
1.31      mycroft   427:                case IP_HDRINCL:
1.108     plunky    428:                        error = sockopt_getint(sopt, &optval);
                    429:                        if (error)
                    430:                                break;
                    431:                        if (optval)
1.100     dyoung    432:                                inp->inp_flags |= INP_HDRINCL;
                    433:                        else
                    434:                                inp->inp_flags &= ~INP_HDRINCL;
1.108     plunky    435:                        break;
1.31      mycroft   436:
                    437: #ifdef MROUTING
                    438:                case MRT_INIT:
                    439:                case MRT_DONE:
                    440:                case MRT_ADD_VIF:
                    441:                case MRT_DEL_VIF:
                    442:                case MRT_ADD_MFC:
                    443:                case MRT_DEL_MFC:
                    444:                case MRT_ASSERT:
1.81      manu      445:                case MRT_API_CONFIG:
                    446:                case MRT_ADD_BW_UPCALL:
                    447:                case MRT_DEL_BW_UPCALL:
1.108     plunky    448:                        error = ip_mrouter_set(so, sopt);
1.31      mycroft   449:                        break;
                    450: #endif
                    451:
                    452:                default:
1.108     plunky    453:                        error = ip_ctloutput(op, so, sopt);
1.31      mycroft   454:                        break;
1.13      mycroft   455:                }
                    456:                break;
1.1       cgd       457:
1.31      mycroft   458:        case PRCO_GETOPT:
1.108     plunky    459:                switch (sopt->sopt_name) {
1.31      mycroft   460:                case IP_HDRINCL:
1.108     plunky    461:                        optval = inp->inp_flags & INP_HDRINCL;
                    462:                        error = sockopt_set(sopt, &optval, sizeof(optval));
1.31      mycroft   463:                        break;
                    464:
1.6       hpeyerl   465: #ifdef MROUTING
1.31      mycroft   466:                case MRT_VERSION:
                    467:                case MRT_ASSERT:
1.81      manu      468:                case MRT_API_SUPPORT:
                    469:                case MRT_API_CONFIG:
1.108     plunky    470:                        error = ip_mrouter_get(so, sopt);
1.18      mycroft   471:                        break;
1.31      mycroft   472: #endif
                    473:
1.18      mycroft   474:                default:
1.108     plunky    475:                        error = ip_ctloutput(op, so, sopt);
1.18      mycroft   476:                        break;
                    477:                }
1.31      mycroft   478:                break;
1.1       cgd       479:        }
1.108     plunky    480:  out:
1.100     dyoung    481:        return error;
1.1       cgd       482: }
                    483:
1.27      mycroft   484: int
1.83      perry     485: rip_bind(struct inpcb *inp, struct mbuf *nam)
1.29      mycroft   486: {
                    487:        struct sockaddr_in *addr = mtod(nam, struct sockaddr_in *);
                    488:
                    489:        if (nam->m_len != sizeof(*addr))
                    490:                return (EINVAL);
1.119     rmind     491:        if (!IFNET_FIRST())
1.29      mycroft   492:                return (EADDRNOTAVAIL);
1.115     joerg     493:        if (addr->sin_family != AF_INET)
1.29      mycroft   494:                return (EAFNOSUPPORT);
1.32      mycroft   495:        if (!in_nullhost(addr->sin_addr) &&
1.29      mycroft   496:            ifa_ifwithaddr(sintosa(addr)) == 0)
                    497:                return (EADDRNOTAVAIL);
                    498:        inp->inp_laddr = addr->sin_addr;
                    499:        return (0);
                    500: }
                    501:
                    502: int
1.83      perry     503: rip_connect(struct inpcb *inp, struct mbuf *nam)
1.27      mycroft   504: {
                    505:        struct sockaddr_in *addr = mtod(nam, struct sockaddr_in *);
                    506:
                    507:        if (nam->m_len != sizeof(*addr))
                    508:                return (EINVAL);
1.119     rmind     509:        if (!IFNET_FIRST())
1.27      mycroft   510:                return (EADDRNOTAVAIL);
1.115     joerg     511:        if (addr->sin_family != AF_INET)
1.27      mycroft   512:                return (EAFNOSUPPORT);
                    513:        inp->inp_faddr = addr->sin_addr;
                    514:        return (0);
                    515: }
                    516:
                    517: void
1.83      perry     518: rip_disconnect(struct inpcb *inp)
1.27      mycroft   519: {
                    520:
1.32      mycroft   521:        inp->inp_faddr = zeroin_addr;
1.27      mycroft   522: }
                    523:
1.121     rmind     524: static int
                    525: rip_attach(struct socket *so, int proto)
                    526: {
                    527:        struct inpcb *inp;
                    528:        int error;
                    529:
                    530:        KASSERT(sotoinpcb(so) == NULL);
                    531:        sosetlock(so);
                    532:
                    533:        if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
                    534:                error = soreserve(so, rip_sendspace, rip_recvspace);
                    535:                if (error) {
                    536:                        return error;
                    537:                }
                    538:        }
                    539:
                    540:        error = in_pcballoc(so, &rawcbtable);
                    541:        if (error) {
                    542:                return error;
                    543:        }
                    544:        inp = sotoinpcb(so);
                    545:        inp->inp_ip.ip_p = proto;
                    546:        KASSERT(solocked(so));
                    547:
                    548:        return 0;
                    549: }
1.13      mycroft   550:
1.121     rmind     551: static void
                    552: rip_detach(struct socket *so)
1.1       cgd       553: {
1.53      augustss  554:        struct inpcb *inp;
1.121     rmind     555:
                    556:        KASSERT(solocked(so));
                    557:        inp = sotoinpcb(so);
                    558:        KASSERT(inp != NULL);
                    559:
1.13      mycroft   560: #ifdef MROUTING
1.6       hpeyerl   561:        extern struct socket *ip_mrouter;
1.121     rmind     562:        if (so == ip_mrouter) {
                    563:                ip_mrouter_done();
                    564:        }
1.6       hpeyerl   565: #endif
1.121     rmind     566:        in_pcbdetach(inp);
                    567: }
                    568:
                    569: int
                    570: rip_usrreq(struct socket *so, int req, struct mbuf *m, struct mbuf *nam,
                    571:     struct mbuf *control, struct lwp *l)
                    572: {
                    573:        struct inpcb *inp;
                    574:        int s, error = 0;
1.27      mycroft   575:
1.121     rmind     576:        KASSERT(req != PRU_ATTACH);
                    577:        KASSERT(req != PRU_DETACH);
1.49      thorpej   578:
1.121     rmind     579:        if (req == PRU_CONTROL) {
                    580:                return in_control(so, (long)m, nam, (ifnet_t *)control, l);
                    581:        }
1.93      tls       582:        s = splsoftnet();
1.50      thorpej   583:        if (req == PRU_PURGEIF) {
1.107     ad        584:                mutex_enter(softnet_lock);
1.56      itojun    585:                in_pcbpurgeif0(&rawcbtable, (struct ifnet *)control);
1.50      thorpej   586:                in_purgeif((struct ifnet *)control);
                    587:                in_pcbpurgeif(&rawcbtable, (struct ifnet *)control);
1.107     ad        588:                mutex_exit(softnet_lock);
1.93      tls       589:                splx(s);
1.121     rmind     590:                return 0;
1.49      thorpej   591:        }
1.22      pk        592:
1.121     rmind     593:        KASSERT(solocked(so));
1.27      mycroft   594:        inp = sotoinpcb(so);
1.121     rmind     595:
                    596:        KASSERT(!control || (req == PRU_SEND || req == PRU_SENDOOB));
                    597:        if (inp == NULL) {
                    598:                splx(s);
                    599:                return EINVAL;
1.22      pk        600:        }
                    601:
1.1       cgd       602:        switch (req) {
                    603:
                    604:        case PRU_BIND:
1.29      mycroft   605:                error = rip_bind(inp, nam);
1.27      mycroft   606:                break;
                    607:
                    608:        case PRU_LISTEN:
                    609:                error = EOPNOTSUPP;
                    610:                break;
                    611:
                    612:        case PRU_CONNECT:
                    613:                error = rip_connect(inp, nam);
                    614:                if (error)
1.13      mycroft   615:                        break;
1.1       cgd       616:                soisconnected(so);
1.13      mycroft   617:                break;
                    618:
                    619:        case PRU_CONNECT2:
                    620:                error = EOPNOTSUPP;
                    621:                break;
                    622:
1.27      mycroft   623:        case PRU_DISCONNECT:
                    624:                soisdisconnected(so);
                    625:                rip_disconnect(inp);
                    626:                break;
                    627:
1.13      mycroft   628:        /*
                    629:         * Mark the connection as being incapable of further input.
                    630:         */
                    631:        case PRU_SHUTDOWN:
                    632:                socantsendmore(so);
                    633:                break;
                    634:
1.27      mycroft   635:        case PRU_RCVD:
                    636:                error = EOPNOTSUPP;
                    637:                break;
                    638:
1.13      mycroft   639:        /*
                    640:         * Ship a packet out.  The appropriate raw output
                    641:         * routine handles any massaging necessary.
                    642:         */
                    643:        case PRU_SEND:
1.28      mycroft   644:                if (control && control->m_len) {
                    645:                        m_freem(control);
                    646:                        m_freem(m);
                    647:                        error = EINVAL;
                    648:                        break;
                    649:                }
                    650:        {
1.27      mycroft   651:                if (nam) {
                    652:                        if ((so->so_state & SS_ISCONNECTED) != 0) {
1.13      mycroft   653:                                error = EISCONN;
1.28      mycroft   654:                                goto die;
1.13      mycroft   655:                        }
1.27      mycroft   656:                        error = rip_connect(inp, nam);
                    657:                        if (error) {
1.28      mycroft   658:                        die:
1.27      mycroft   659:                                m_freem(m);
                    660:                                break;
                    661:                        }
1.13      mycroft   662:                } else {
1.27      mycroft   663:                        if ((so->so_state & SS_ISCONNECTED) == 0) {
1.13      mycroft   664:                                error = ENOTCONN;
1.28      mycroft   665:                                goto die;
1.13      mycroft   666:                        }
                    667:                }
1.27      mycroft   668:                error = rip_output(m, inp);
                    669:                if (nam)
                    670:                        rip_disconnect(inp);
1.28      mycroft   671:        }
1.13      mycroft   672:                break;
                    673:
                    674:        case PRU_SENSE:
                    675:                /*
                    676:                 * stat: don't bother with a blocksize.
                    677:                 */
1.27      mycroft   678:                splx(s);
1.1       cgd       679:                return (0);
1.13      mycroft   680:
                    681:        case PRU_RCVOOB:
1.27      mycroft   682:                error = EOPNOTSUPP;
                    683:                break;
                    684:
1.13      mycroft   685:        case PRU_SENDOOB:
1.28      mycroft   686:                m_freem(control);
1.27      mycroft   687:                m_freem(m);
1.13      mycroft   688:                error = EOPNOTSUPP;
                    689:                break;
                    690:
                    691:        case PRU_SOCKADDR:
                    692:                in_setsockaddr(inp, nam);
                    693:                break;
                    694:
                    695:        case PRU_PEERADDR:
                    696:                in_setpeeraddr(inp, nam);
                    697:                break;
                    698:
                    699:        default:
                    700:                panic("rip_usrreq");
1.1       cgd       701:        }
1.121     rmind     702:        splx(s);
1.27      mycroft   703:
1.121     rmind     704:        return error;
1.1       cgd       705: }
1.84      atatat    706:
1.122     rmind     707: PR_WRAP_USRREQS(rip)
                    708: #define        rip_attach      rip_attach_wrapper
                    709: #define        rip_detach      rip_detach_wrapper
1.120     rmind     710: #define        rip_usrreq      rip_usrreq_wrapper
                    711:
                    712: const struct pr_usrreqs rip_usrreqs = {
1.121     rmind     713:        .pr_attach      = rip_attach,
                    714:        .pr_detach      = rip_detach,
1.120     rmind     715:        .pr_generic     = rip_usrreq,
                    716: };
                    717:
1.110     pooka     718: static void
                    719: sysctl_net_inet_raw_setup(struct sysctllog **clog)
1.84      atatat    720: {
                    721:
                    722:        sysctl_createv(clog, 0, NULL, NULL,
                    723:                       CTLFLAG_PERMANENT,
                    724:                       CTLTYPE_NODE, "inet", NULL,
                    725:                       NULL, 0, NULL, 0,
                    726:                       CTL_NET, PF_INET, CTL_EOL);
                    727:        sysctl_createv(clog, 0, NULL, NULL,
                    728:                       CTLFLAG_PERMANENT,
                    729:                       CTLTYPE_NODE, "raw",
                    730:                       SYSCTL_DESCR("Raw IPv4 settings"),
                    731:                       NULL, 0, NULL, 0,
                    732:                       CTL_NET, PF_INET, IPPROTO_RAW, CTL_EOL);
                    733:
                    734:        sysctl_createv(clog, 0, NULL, NULL,
                    735:                       CTLFLAG_PERMANENT,
1.86      atatat    736:                       CTLTYPE_STRUCT, "pcblist",
1.84      atatat    737:                       SYSCTL_DESCR("Raw IPv4 control block list"),
                    738:                       sysctl_inpcblist, 0, &rawcbtable, 0,
                    739:                       CTL_NET, PF_INET, IPPROTO_RAW,
                    740:                       CTL_CREATE, CTL_EOL);
                    741: }

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