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Annotation of src/sys/netinet/udp_usrreq.c, Revision 1.24.2.1

1.24.2.1! mycroft     1: /*     $NetBSD: udp_usrreq.c,v 1.24 1995/08/12 23:59:42 mycroft Exp $  */
1.14      cgd         2:
1.1       cgd         3: /*
1.13      mycroft     4:  * Copyright (c) 1982, 1986, 1988, 1990, 1993
                      5:  *     The Regents of the University of California.  All rights reserved.
1.1       cgd         6:  *
                      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. All advertising materials mentioning features or use of this software
                     16:  *    must display the following acknowledgement:
                     17:  *     This product includes software developed by the University of
                     18:  *     California, Berkeley and its contributors.
                     19:  * 4. Neither the name of the University nor the names of its contributors
                     20:  *    may be used to endorse or promote products derived from this software
                     21:  *    without specific prior written permission.
                     22:  *
                     23:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     24:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     25:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     26:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     27:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     28:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     29:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     30:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     31:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     32:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     33:  * SUCH DAMAGE.
                     34:  *
1.14      cgd        35:  *     @(#)udp_usrreq.c        8.4 (Berkeley) 1/21/94
1.1       cgd        36:  */
                     37:
1.5       mycroft    38: #include <sys/param.h>
                     39: #include <sys/malloc.h>
                     40: #include <sys/mbuf.h>
                     41: #include <sys/protosw.h>
                     42: #include <sys/socket.h>
                     43: #include <sys/socketvar.h>
1.13      mycroft    44: #include <sys/errno.h>
1.5       mycroft    45: #include <sys/stat.h>
1.1       cgd        46:
1.5       mycroft    47: #include <net/if.h>
                     48: #include <net/route.h>
1.1       cgd        49:
1.5       mycroft    50: #include <netinet/in.h>
                     51: #include <netinet/in_systm.h>
1.15      cgd        52: #include <netinet/in_var.h>
1.5       mycroft    53: #include <netinet/ip.h>
                     54: #include <netinet/in_pcb.h>
                     55: #include <netinet/ip_var.h>
                     56: #include <netinet/ip_icmp.h>
                     57: #include <netinet/udp.h>
                     58: #include <netinet/udp_var.h>
1.1       cgd        59:
1.8       mycroft    60: /*
                     61:  * UDP protocol implementation.
                     62:  * Per RFC 768, August, 1980.
                     63:  */
                     64: #ifndef        COMPAT_42
                     65: int    udpcksum = 1;
                     66: #else
                     67: int    udpcksum = 0;           /* XXX */
                     68: #endif
                     69:
                     70: struct sockaddr_in udp_in = { sizeof(udp_in), AF_INET };
1.1       cgd        71:
1.13      mycroft    72: static void udp_detach __P((struct inpcb *));
                     73: static void udp_notify __P((struct inpcb *, int));
                     74: static struct mbuf *udp_saveopt __P((caddr_t, int, int));
1.7       mycroft    75:
1.24.2.1! mycroft    76: #ifndef UDBHASHSIZE
        !            77: #define        UDBHASHSIZE     128
        !            78: #endif
        !            79: int    udbhashsize = UDBHASHSIZE;
        !            80:
1.7       mycroft    81: void
1.1       cgd        82: udp_init()
                     83: {
1.18      mycroft    84:
1.24.2.1! mycroft    85:        in_pcbinit(&udbtable, udbhashsize);
1.1       cgd        86: }
                     87:
1.7       mycroft    88: void
1.1       cgd        89: udp_input(m, iphlen)
                     90:        register struct mbuf *m;
                     91:        int iphlen;
                     92: {
                     93:        register struct ip *ip;
                     94:        register struct udphdr *uh;
                     95:        register struct inpcb *inp;
                     96:        struct mbuf *opts = 0;
                     97:        int len;
                     98:        struct ip save_ip;
                     99:
                    100:        udpstat.udps_ipackets++;
                    101:
                    102:        /*
                    103:         * Strip IP options, if any; should skip this,
                    104:         * make available to user, and use on returned packets,
                    105:         * but we don't yet have a way to check the checksum
                    106:         * with options still present.
                    107:         */
                    108:        if (iphlen > sizeof (struct ip)) {
                    109:                ip_stripoptions(m, (struct mbuf *)0);
                    110:                iphlen = sizeof(struct ip);
                    111:        }
                    112:
                    113:        /*
                    114:         * Get IP and UDP header together in first mbuf.
                    115:         */
                    116:        ip = mtod(m, struct ip *);
                    117:        if (m->m_len < iphlen + sizeof(struct udphdr)) {
                    118:                if ((m = m_pullup(m, iphlen + sizeof(struct udphdr))) == 0) {
                    119:                        udpstat.udps_hdrops++;
                    120:                        return;
                    121:                }
                    122:                ip = mtod(m, struct ip *);
                    123:        }
                    124:        uh = (struct udphdr *)((caddr_t)ip + iphlen);
                    125:
                    126:        /*
                    127:         * Make mbuf data length reflect UDP length.
                    128:         * If not enough data to reflect UDP length, drop.
                    129:         */
1.15      cgd       130:        len = ntohs((u_int16_t)uh->uh_ulen);
1.1       cgd       131:        if (ip->ip_len != len) {
                    132:                if (len > ip->ip_len) {
                    133:                        udpstat.udps_badlen++;
                    134:                        goto bad;
                    135:                }
                    136:                m_adj(m, len - ip->ip_len);
                    137:                /* ip->ip_len = len; */
                    138:        }
                    139:        /*
                    140:         * Save a copy of the IP header in case we want restore it
                    141:         * for sending an ICMP error message in response.
                    142:         */
                    143:        save_ip = *ip;
                    144:
                    145:        /*
                    146:         * Checksum extended UDP header and data.
                    147:         */
                    148:        if (udpcksum && uh->uh_sum) {
                    149:                ((struct ipovly *)ip)->ih_next = 0;
                    150:                ((struct ipovly *)ip)->ih_prev = 0;
                    151:                ((struct ipovly *)ip)->ih_x1 = 0;
                    152:                ((struct ipovly *)ip)->ih_len = uh->uh_ulen;
                    153:                if (uh->uh_sum = in_cksum(m, len + sizeof (struct ip))) {
                    154:                        udpstat.udps_badsum++;
                    155:                        m_freem(m);
                    156:                        return;
                    157:                }
                    158:        }
1.13      mycroft   159:
1.16      mycroft   160:        if (IN_MULTICAST(ip->ip_dst.s_addr) ||
1.13      mycroft   161:            in_broadcast(ip->ip_dst, m->m_pkthdr.rcvif)) {
1.4       hpeyerl   162:                struct socket *last;
                    163:                /*
                    164:                 * Deliver a multicast or broadcast datagram to *all* sockets
                    165:                 * for which the local and remote addresses and ports match
                    166:                 * those of the incoming datagram.  This allows more than
                    167:                 * one process to receive multi/broadcasts on the same port.
                    168:                 * (This really ought to be done for unicast datagrams as
                    169:                 * well, but that would cause problems with existing
                    170:                 * applications that open both address-specific sockets and
                    171:                 * a wildcard socket listening to the same port -- they would
                    172:                 * end up receiving duplicates of every unicast datagram.
                    173:                 * Those applications open the multiple sockets to overcome an
                    174:                 * inadequacy of the UDP socket interface, but for backwards
                    175:                 * compatibility we avoid the problem here rather than
1.13      mycroft   176:                 * fixing the interface.  Maybe 4.5BSD will remedy this?)
1.4       hpeyerl   177:                 */
1.13      mycroft   178:
1.4       hpeyerl   179:                /*
                    180:                 * Construct sockaddr format source address.
                    181:                 */
                    182:                udp_in.sin_port = uh->uh_sport;
                    183:                udp_in.sin_addr = ip->ip_src;
                    184:                m->m_len -= sizeof (struct udpiphdr);
                    185:                m->m_data += sizeof (struct udpiphdr);
                    186:                /*
                    187:                 * Locate pcb(s) for datagram.
                    188:                 * (Algorithm copied from raw_intr().)
                    189:                 */
                    190:                last = NULL;
1.22      cgd       191:                for (inp = udbtable.inpt_queue.cqh_first;
                    192:                    inp != (struct inpcb *)&udbtable.inpt_queue;
                    193:                    inp = inp->inp_queue.cqe_next) {
1.4       hpeyerl   194:                        if (inp->inp_lport != uh->uh_dport)
                    195:                                continue;
                    196:                        if (inp->inp_laddr.s_addr != INADDR_ANY) {
                    197:                                if (inp->inp_laddr.s_addr !=
                    198:                                    ip->ip_dst.s_addr)
                    199:                                        continue;
                    200:                        }
                    201:                        if (inp->inp_faddr.s_addr != INADDR_ANY) {
1.6       mycroft   202:                                if (inp->inp_faddr.s_addr !=
1.4       hpeyerl   203:                                    ip->ip_src.s_addr ||
                    204:                                    inp->inp_fport != uh->uh_sport)
                    205:                                        continue;
                    206:                        }
                    207:
                    208:                        if (last != NULL) {
                    209:                                struct mbuf *n;
                    210:
                    211:                                if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
                    212:                                        if (sbappendaddr(&last->so_rcv,
1.17      mycroft   213:                                                sintosa(&udp_in), n,
                    214:                                                (struct mbuf *)0) == 0) {
1.4       hpeyerl   215:                                                m_freem(n);
1.13      mycroft   216:                                                udpstat.udps_fullsock++;
                    217:                                        } else
1.4       hpeyerl   218:                                                sorwakeup(last);
                    219:                                }
                    220:                        }
                    221:                        last = inp->inp_socket;
                    222:                        /*
1.13      mycroft   223:                         * Don't look for additional matches if this one does
                    224:                         * not have either the SO_REUSEPORT or SO_REUSEADDR
                    225:                         * socket options set.  This heuristic avoids searching
                    226:                         * through all pcbs in the common case of a non-shared
                    227:                         * port.  It * assumes that an application will never
                    228:                         * clear these options after setting them.
1.4       hpeyerl   229:                         */
1.13      mycroft   230:                        if ((last->so_options&(SO_REUSEPORT|SO_REUSEADDR) == 0))
1.4       hpeyerl   231:                                break;
                    232:                }
1.6       mycroft   233:
1.4       hpeyerl   234:                if (last == NULL) {
                    235:                        /*
                    236:                         * No matching pcb found; discard datagram.
                    237:                         * (No need to send an ICMP Port Unreachable
                    238:                         * for a broadcast or multicast datgram.)
                    239:                         */
1.13      mycroft   240:                        udpstat.udps_noportbcast++;
1.4       hpeyerl   241:                        goto bad;
                    242:                }
1.17      mycroft   243:                if (sbappendaddr(&last->so_rcv, sintosa(&udp_in), m,
                    244:                    (struct mbuf *)0) == 0) {
1.13      mycroft   245:                        udpstat.udps_fullsock++;
1.4       hpeyerl   246:                        goto bad;
1.13      mycroft   247:                }
1.4       hpeyerl   248:                sorwakeup(last);
                    249:                return;
                    250:        }
1.1       cgd       251:        /*
                    252:         * Locate pcb for datagram.
                    253:         */
1.24.2.1! mycroft   254:        inp = in_pcbhashlookup(&udbtable, ip->ip_src, uh->uh_sport,
        !           255:            ip->ip_dst, uh->uh_dport);
        !           256:        if (inp == 0) {
        !           257:                ++udpstat.udps_pcbhashmiss;
1.18      mycroft   258:                inp = in_pcblookup(&udbtable, ip->ip_src, uh->uh_sport,
1.1       cgd       259:                    ip->ip_dst, uh->uh_dport, INPLOOKUP_WILDCARD);
1.18      mycroft   260:                if (inp == 0) {
                    261:                        udpstat.udps_noport++;
                    262:                        if (m->m_flags & (M_BCAST | M_MCAST)) {
                    263:                                udpstat.udps_noportbcast++;
                    264:                                goto bad;
                    265:                        }
                    266:                        *ip = save_ip;
                    267:                        ip->ip_len += iphlen;
                    268:                        icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0);
                    269:                        return;
1.13      mycroft   270:                }
1.1       cgd       271:        }
                    272:
                    273:        /*
                    274:         * Construct sockaddr format source address.
                    275:         * Stuff source address and datagram in user buffer.
                    276:         */
                    277:        udp_in.sin_port = uh->uh_sport;
                    278:        udp_in.sin_addr = ip->ip_src;
                    279:        if (inp->inp_flags & INP_CONTROLOPTS) {
                    280:                struct mbuf **mp = &opts;
                    281:
                    282:                if (inp->inp_flags & INP_RECVDSTADDR) {
                    283:                        *mp = udp_saveopt((caddr_t) &ip->ip_dst,
                    284:                            sizeof(struct in_addr), IP_RECVDSTADDR);
                    285:                        if (*mp)
                    286:                                mp = &(*mp)->m_next;
                    287:                }
                    288: #ifdef notyet
                    289:                /* options were tossed above */
                    290:                if (inp->inp_flags & INP_RECVOPTS) {
                    291:                        *mp = udp_saveopt((caddr_t) opts_deleted_above,
                    292:                            sizeof(struct in_addr), IP_RECVOPTS);
                    293:                        if (*mp)
                    294:                                mp = &(*mp)->m_next;
                    295:                }
                    296:                /* ip_srcroute doesn't do what we want here, need to fix */
                    297:                if (inp->inp_flags & INP_RECVRETOPTS) {
                    298:                        *mp = udp_saveopt((caddr_t) ip_srcroute(),
                    299:                            sizeof(struct in_addr), IP_RECVRETOPTS);
                    300:                        if (*mp)
                    301:                                mp = &(*mp)->m_next;
                    302:                }
                    303: #endif
                    304:        }
                    305:        iphlen += sizeof(struct udphdr);
                    306:        m->m_len -= iphlen;
                    307:        m->m_pkthdr.len -= iphlen;
                    308:        m->m_data += iphlen;
1.17      mycroft   309:        if (sbappendaddr(&inp->inp_socket->so_rcv, sintosa(&udp_in), m,
                    310:            opts) == 0) {
1.1       cgd       311:                udpstat.udps_fullsock++;
                    312:                goto bad;
                    313:        }
                    314:        sorwakeup(inp->inp_socket);
                    315:        return;
                    316: bad:
                    317:        m_freem(m);
                    318:        if (opts)
                    319:                m_freem(opts);
                    320: }
                    321:
                    322: /*
                    323:  * Create a "control" mbuf containing the specified data
                    324:  * with the specified type for presentation with a datagram.
                    325:  */
1.13      mycroft   326: struct mbuf *
1.1       cgd       327: udp_saveopt(p, size, type)
                    328:        caddr_t p;
                    329:        register int size;
                    330:        int type;
                    331: {
                    332:        register struct cmsghdr *cp;
                    333:        struct mbuf *m;
                    334:
                    335:        if ((m = m_get(M_DONTWAIT, MT_CONTROL)) == NULL)
                    336:                return ((struct mbuf *) NULL);
                    337:        cp = (struct cmsghdr *) mtod(m, struct cmsghdr *);
1.13      mycroft   338:        bcopy(p, CMSG_DATA(cp), size);
1.1       cgd       339:        size += sizeof(*cp);
                    340:        m->m_len = size;
                    341:        cp->cmsg_len = size;
                    342:        cp->cmsg_level = IPPROTO_IP;
                    343:        cp->cmsg_type = type;
                    344:        return (m);
                    345: }
                    346:
                    347: /*
                    348:  * Notify a udp user of an asynchronous error;
                    349:  * just wake up so that he can collect error status.
                    350:  */
1.7       mycroft   351: static void
1.1       cgd       352: udp_notify(inp, errno)
                    353:        register struct inpcb *inp;
1.7       mycroft   354:        int errno;
1.1       cgd       355: {
                    356:        inp->inp_socket->so_error = errno;
                    357:        sorwakeup(inp->inp_socket);
                    358:        sowwakeup(inp->inp_socket);
                    359: }
                    360:
1.7       mycroft   361: void
1.1       cgd       362: udp_ctlinput(cmd, sa, ip)
                    363:        int cmd;
                    364:        struct sockaddr *sa;
                    365:        register struct ip *ip;
                    366: {
                    367:        register struct udphdr *uh;
                    368:        extern struct in_addr zeroin_addr;
1.21      mycroft   369:        extern int inetctlerrmap[];
1.18      mycroft   370:        void (*notify) __P((struct inpcb *, int)) = udp_notify;
1.21      mycroft   371:        int errno;
1.1       cgd       372:
1.20      mycroft   373:        if ((unsigned)cmd >= PRC_NCMDS)
                    374:                return;
                    375:        errno = inetctlerrmap[cmd];
1.18      mycroft   376:        if (PRC_IS_REDIRECT(cmd))
1.19      mycroft   377:                notify = in_rtchange, ip = 0;
1.18      mycroft   378:        else if (cmd == PRC_HOSTDEAD)
1.19      mycroft   379:                ip = 0;
1.23      cgd       380:        else if (errno == 0)
1.1       cgd       381:                return;
1.19      mycroft   382:        if (ip) {
1.1       cgd       383:                uh = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2));
1.18      mycroft   384:                in_pcbnotify(&udbtable, sa, uh->uh_dport, ip->ip_src,
1.20      mycroft   385:                    uh->uh_sport, errno, notify);
1.19      mycroft   386:        } else
1.20      mycroft   387:                in_pcbnotifyall(&udbtable, sa, errno, notify);
1.1       cgd       388: }
                    389:
1.7       mycroft   390: int
1.1       cgd       391: udp_output(inp, m, addr, control)
                    392:        register struct inpcb *inp;
                    393:        register struct mbuf *m;
                    394:        struct mbuf *addr, *control;
                    395: {
                    396:        register struct udpiphdr *ui;
                    397:        register int len = m->m_pkthdr.len;
                    398:        struct in_addr laddr;
                    399:        int s, error = 0;
                    400:
                    401:        if (control)
                    402:                m_freem(control);               /* XXX */
                    403:
                    404:        if (addr) {
                    405:                laddr = inp->inp_laddr;
                    406:                if (inp->inp_faddr.s_addr != INADDR_ANY) {
                    407:                        error = EISCONN;
                    408:                        goto release;
                    409:                }
                    410:                /*
                    411:                 * Must block input while temporarily connected.
                    412:                 */
1.24      mycroft   413:                s = splsoftnet();
1.1       cgd       414:                error = in_pcbconnect(inp, addr);
                    415:                if (error) {
                    416:                        splx(s);
                    417:                        goto release;
                    418:                }
                    419:        } else {
                    420:                if (inp->inp_faddr.s_addr == INADDR_ANY) {
                    421:                        error = ENOTCONN;
                    422:                        goto release;
                    423:                }
                    424:        }
                    425:        /*
                    426:         * Calculate data length and get a mbuf
                    427:         * for UDP and IP headers.
                    428:         */
1.13      mycroft   429:        M_PREPEND(m, sizeof(struct udpiphdr), M_DONTWAIT);
                    430:        if (m == 0) {
                    431:                error = ENOBUFS;
                    432:                goto release;
                    433:        }
1.1       cgd       434:
                    435:        /*
                    436:         * Fill in mbuf with extended UDP header
                    437:         * and addresses and length put into network format.
                    438:         */
                    439:        ui = mtod(m, struct udpiphdr *);
                    440:        ui->ui_next = ui->ui_prev = 0;
                    441:        ui->ui_x1 = 0;
                    442:        ui->ui_pr = IPPROTO_UDP;
1.15      cgd       443:        ui->ui_len = htons((u_int16_t)len + sizeof (struct udphdr));
1.1       cgd       444:        ui->ui_src = inp->inp_laddr;
                    445:        ui->ui_dst = inp->inp_faddr;
                    446:        ui->ui_sport = inp->inp_lport;
                    447:        ui->ui_dport = inp->inp_fport;
                    448:        ui->ui_ulen = ui->ui_len;
                    449:
                    450:        /*
                    451:         * Stuff checksum and output datagram.
                    452:         */
                    453:        ui->ui_sum = 0;
                    454:        if (udpcksum) {
                    455:            if ((ui->ui_sum = in_cksum(m, sizeof (struct udpiphdr) + len)) == 0)
                    456:                ui->ui_sum = 0xffff;
                    457:        }
                    458:        ((struct ip *)ui)->ip_len = sizeof (struct udpiphdr) + len;
                    459:        ((struct ip *)ui)->ip_ttl = inp->inp_ip.ip_ttl; /* XXX */
                    460:        ((struct ip *)ui)->ip_tos = inp->inp_ip.ip_tos; /* XXX */
                    461:        udpstat.udps_opackets++;
                    462:        error = ip_output(m, inp->inp_options, &inp->inp_route,
1.12      mycroft   463:            inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST),
                    464:            inp->inp_moptions);
1.1       cgd       465:
                    466:        if (addr) {
                    467:                in_pcbdisconnect(inp);
                    468:                inp->inp_laddr = laddr;
                    469:                splx(s);
                    470:        }
                    471:        return (error);
                    472:
                    473: release:
                    474:        m_freem(m);
                    475:        return (error);
                    476: }
                    477:
                    478: u_long udp_sendspace = 9216;           /* really max datagram size */
                    479: u_long udp_recvspace = 40 * (1024 + sizeof(struct sockaddr_in));
                    480:                                        /* 40 1K datagrams */
                    481:
                    482: /*ARGSUSED*/
1.7       mycroft   483: int
1.1       cgd       484: udp_usrreq(so, req, m, addr, control)
                    485:        struct socket *so;
                    486:        int req;
                    487:        struct mbuf *m, *addr, *control;
                    488: {
                    489:        struct inpcb *inp = sotoinpcb(so);
                    490:        int error = 0;
                    491:        int s;
                    492:
                    493:        if (req == PRU_CONTROL)
1.15      cgd       494:                return (in_control(so, (long)m, (caddr_t)addr,
1.1       cgd       495:                        (struct ifnet *)control));
                    496:        if (inp == NULL && req != PRU_ATTACH) {
                    497:                error = EINVAL;
                    498:                goto release;
                    499:        }
                    500:        /*
                    501:         * Note: need to block udp_input while changing
                    502:         * the udp pcb queue and/or pcb addresses.
                    503:         */
                    504:        switch (req) {
                    505:
                    506:        case PRU_ATTACH:
                    507:                if (inp != NULL) {
                    508:                        error = EINVAL;
                    509:                        break;
                    510:                }
1.24      mycroft   511:                s = splsoftnet();
1.18      mycroft   512:                error = in_pcballoc(so, &udbtable);
1.1       cgd       513:                splx(s);
                    514:                if (error)
                    515:                        break;
                    516:                error = soreserve(so, udp_sendspace, udp_recvspace);
                    517:                if (error)
                    518:                        break;
1.13      mycroft   519:                ((struct inpcb *) so->so_pcb)->inp_ip.ip_ttl = ip_defttl;
1.1       cgd       520:                break;
                    521:
                    522:        case PRU_DETACH:
                    523:                udp_detach(inp);
                    524:                break;
                    525:
                    526:        case PRU_BIND:
1.24      mycroft   527:                s = splsoftnet();
1.1       cgd       528:                error = in_pcbbind(inp, addr);
                    529:                splx(s);
                    530:                break;
                    531:
                    532:        case PRU_LISTEN:
                    533:                error = EOPNOTSUPP;
                    534:                break;
                    535:
                    536:        case PRU_CONNECT:
                    537:                if (inp->inp_faddr.s_addr != INADDR_ANY) {
                    538:                        error = EISCONN;
                    539:                        break;
                    540:                }
1.24      mycroft   541:                s = splsoftnet();
1.1       cgd       542:                error = in_pcbconnect(inp, addr);
                    543:                splx(s);
                    544:                if (error == 0)
                    545:                        soisconnected(so);
                    546:                break;
                    547:
                    548:        case PRU_CONNECT2:
                    549:                error = EOPNOTSUPP;
                    550:                break;
                    551:
                    552:        case PRU_ACCEPT:
                    553:                error = EOPNOTSUPP;
                    554:                break;
                    555:
                    556:        case PRU_DISCONNECT:
                    557:                if (inp->inp_faddr.s_addr == INADDR_ANY) {
                    558:                        error = ENOTCONN;
                    559:                        break;
                    560:                }
1.24      mycroft   561:                s = splsoftnet();
1.1       cgd       562:                in_pcbdisconnect(inp);
                    563:                inp->inp_laddr.s_addr = INADDR_ANY;
                    564:                splx(s);
                    565:                so->so_state &= ~SS_ISCONNECTED;                /* XXX */
                    566:                break;
                    567:
                    568:        case PRU_SHUTDOWN:
                    569:                socantsendmore(so);
                    570:                break;
                    571:
                    572:        case PRU_SEND:
                    573:                return (udp_output(inp, m, addr, control));
                    574:
                    575:        case PRU_ABORT:
                    576:                soisdisconnected(so);
                    577:                udp_detach(inp);
                    578:                break;
                    579:
                    580:        case PRU_SOCKADDR:
                    581:                in_setsockaddr(inp, addr);
                    582:                break;
                    583:
                    584:        case PRU_PEERADDR:
                    585:                in_setpeeraddr(inp, addr);
                    586:                break;
                    587:
                    588:        case PRU_SENSE:
                    589:                /*
                    590:                 * stat: don't bother with a blocksize.
                    591:                 */
                    592:                return (0);
                    593:
                    594:        case PRU_SENDOOB:
                    595:        case PRU_FASTTIMO:
                    596:        case PRU_SLOWTIMO:
                    597:        case PRU_PROTORCV:
                    598:        case PRU_PROTOSEND:
                    599:                error =  EOPNOTSUPP;
                    600:                break;
                    601:
                    602:        case PRU_RCVD:
                    603:        case PRU_RCVOOB:
                    604:                return (EOPNOTSUPP);    /* do not free mbuf's */
                    605:
                    606:        default:
                    607:                panic("udp_usrreq");
                    608:        }
                    609:
                    610: release:
                    611:        if (control) {
                    612:                printf("udp control data unexpectedly retained\n");
                    613:                m_freem(control);
                    614:        }
                    615:        if (m)
                    616:                m_freem(m);
                    617:        return (error);
                    618: }
                    619:
1.7       mycroft   620: static void
1.1       cgd       621: udp_detach(inp)
                    622:        struct inpcb *inp;
                    623: {
1.24      mycroft   624:        int s = splsoftnet();
1.1       cgd       625:
                    626:        in_pcbdetach(inp);
                    627:        splx(s);
1.13      mycroft   628: }
                    629:
                    630: /*
                    631:  * Sysctl for udp variables.
                    632:  */
                    633: udp_sysctl(name, namelen, oldp, oldlenp, newp, newlen)
                    634:        int *name;
                    635:        u_int namelen;
                    636:        void *oldp;
                    637:        size_t *oldlenp;
                    638:        void *newp;
                    639:        size_t newlen;
                    640: {
                    641:        /* All sysctl names at this level are terminal. */
                    642:        if (namelen != 1)
                    643:                return (ENOTDIR);
                    644:
                    645:        switch (name[0]) {
                    646:        case UDPCTL_CHECKSUM:
                    647:                return (sysctl_int(oldp, oldlenp, newp, newlen, &udpcksum));
                    648:        default:
                    649:                return (ENOPROTOOPT);
                    650:        }
                    651:        /* NOTREACHED */
1.1       cgd       652: }

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