[BACK]Return to udp_usrreq.c CVS log [TXT][DIR] Up to [cvs.NetBSD.org] / src / sys / netinet

Annotation of src/sys/netinet/udp_usrreq.c, Revision 1.47

1.47    ! mycroft     1: /*     $NetBSD: udp_usrreq.c,v 1.46 1999/01/19 21:58:41 mycroft Exp $  */
1.14      cgd         2:
1.1       cgd         3: /*
1.44      thorpej     4:  * Copyright (c) 1982, 1986, 1988, 1990, 1993, 1995
1.13      mycroft     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:  *
1.44      thorpej    35:  *     @(#)udp_usrreq.c        8.6 (Berkeley) 5/23/95
1.1       cgd        36:  */
1.38      ws         37: #include "ipkdb.h"
1.1       cgd        38:
1.5       mycroft    39: #include <sys/param.h>
                     40: #include <sys/malloc.h>
                     41: #include <sys/mbuf.h>
                     42: #include <sys/protosw.h>
                     43: #include <sys/socket.h>
                     44: #include <sys/socketvar.h>
1.13      mycroft    45: #include <sys/errno.h>
1.5       mycroft    46: #include <sys/stat.h>
1.27      christos   47: #include <sys/systm.h>
                     48: #include <sys/proc.h>
                     49:
                     50: #include <vm/vm.h>
                     51: #include <sys/sysctl.h>
1.1       cgd        52:
1.5       mycroft    53: #include <net/if.h>
                     54: #include <net/route.h>
1.1       cgd        55:
1.5       mycroft    56: #include <netinet/in.h>
                     57: #include <netinet/in_systm.h>
1.15      cgd        58: #include <netinet/in_var.h>
1.5       mycroft    59: #include <netinet/ip.h>
                     60: #include <netinet/in_pcb.h>
                     61: #include <netinet/ip_var.h>
                     62: #include <netinet/ip_icmp.h>
                     63: #include <netinet/udp.h>
                     64: #include <netinet/udp_var.h>
1.1       cgd        65:
1.27      christos   66: #include <machine/stdarg.h>
                     67:
1.8       mycroft    68: /*
                     69:  * UDP protocol implementation.
                     70:  * Per RFC 768, August, 1980.
                     71:  */
                     72: #ifndef        COMPAT_42
                     73: int    udpcksum = 1;
                     74: #else
                     75: int    udpcksum = 0;           /* XXX */
                     76: #endif
                     77:
1.13      mycroft    78: static void udp_notify __P((struct inpcb *, int));
1.7       mycroft    79:
1.26      mycroft    80: #ifndef UDBHASHSIZE
                     81: #define        UDBHASHSIZE     128
                     82: #endif
                     83: int    udbhashsize = UDBHASHSIZE;
                     84:
1.7       mycroft    85: void
1.1       cgd        86: udp_init()
                     87: {
1.18      mycroft    88:
1.35      mycroft    89:        in_pcbinit(&udbtable, udbhashsize, udbhashsize);
1.1       cgd        90: }
                     91:
1.7       mycroft    92: void
1.27      christos   93: #if __STDC__
                     94: udp_input(struct mbuf *m, ...)
                     95: #else
                     96: udp_input(m, va_alist)
                     97:        struct mbuf *m;
                     98:        va_dcl
                     99: #endif
1.1       cgd       100: {
                    101:        register struct ip *ip;
                    102:        register struct udphdr *uh;
                    103:        register struct inpcb *inp;
                    104:        struct mbuf *opts = 0;
                    105:        int len;
                    106:        struct ip save_ip;
1.27      christos  107:        int iphlen;
                    108:        va_list ap;
1.34      mycroft   109:        struct sockaddr_in udpsrc;
1.27      christos  110:
                    111:        va_start(ap, m);
                    112:        iphlen = va_arg(ap, int);
                    113:        va_end(ap);
1.1       cgd       114:
                    115:        udpstat.udps_ipackets++;
                    116:
                    117:        /*
                    118:         * Strip IP options, if any; should skip this,
                    119:         * make available to user, and use on returned packets,
                    120:         * but we don't yet have a way to check the checksum
                    121:         * with options still present.
                    122:         */
                    123:        if (iphlen > sizeof (struct ip)) {
                    124:                ip_stripoptions(m, (struct mbuf *)0);
                    125:                iphlen = sizeof(struct ip);
                    126:        }
                    127:
                    128:        /*
                    129:         * Get IP and UDP header together in first mbuf.
                    130:         */
                    131:        ip = mtod(m, struct ip *);
                    132:        if (m->m_len < iphlen + sizeof(struct udphdr)) {
                    133:                if ((m = m_pullup(m, iphlen + sizeof(struct udphdr))) == 0) {
                    134:                        udpstat.udps_hdrops++;
                    135:                        return;
                    136:                }
                    137:                ip = mtod(m, struct ip *);
                    138:        }
                    139:        uh = (struct udphdr *)((caddr_t)ip + iphlen);
                    140:
                    141:        /*
                    142:         * Make mbuf data length reflect UDP length.
                    143:         * If not enough data to reflect UDP length, drop.
                    144:         */
1.15      cgd       145:        len = ntohs((u_int16_t)uh->uh_ulen);
1.47    ! mycroft   146:        if (ip->ip_len != iphlen + len) {
        !           147:                if (ip->ip_len < iphlen + len) {
1.1       cgd       148:                        udpstat.udps_badlen++;
                    149:                        goto bad;
                    150:                }
1.47    ! mycroft   151:                m_adj(m, iphlen + len - ip->ip_len);
1.1       cgd       152:        }
                    153:        /*
                    154:         * Save a copy of the IP header in case we want restore it
                    155:         * for sending an ICMP error message in response.
                    156:         */
                    157:        save_ip = *ip;
                    158:
                    159:        /*
                    160:         * Checksum extended UDP header and data.
                    161:         */
1.29      mrg       162:        if (uh->uh_sum) {
1.25      cgd       163:                bzero(((struct ipovly *)ip)->ih_x1,
                    164:                    sizeof ((struct ipovly *)ip)->ih_x1);
1.1       cgd       165:                ((struct ipovly *)ip)->ih_len = uh->uh_ulen;
1.46      mycroft   166:                if (in_cksum(m, len + sizeof (struct ip)) != 0) {
1.1       cgd       167:                        udpstat.udps_badsum++;
                    168:                        m_freem(m);
                    169:                        return;
                    170:                }
                    171:        }
1.13      mycroft   172:
1.16      mycroft   173:        if (IN_MULTICAST(ip->ip_dst.s_addr) ||
1.13      mycroft   174:            in_broadcast(ip->ip_dst, m->m_pkthdr.rcvif)) {
1.40      thorpej   175:                struct inpcb *last;
1.4       hpeyerl   176:                /*
                    177:                 * Deliver a multicast or broadcast datagram to *all* sockets
                    178:                 * for which the local and remote addresses and ports match
                    179:                 * those of the incoming datagram.  This allows more than
                    180:                 * one process to receive multi/broadcasts on the same port.
                    181:                 * (This really ought to be done for unicast datagrams as
                    182:                 * well, but that would cause problems with existing
                    183:                 * applications that open both address-specific sockets and
                    184:                 * a wildcard socket listening to the same port -- they would
                    185:                 * end up receiving duplicates of every unicast datagram.
                    186:                 * Those applications open the multiple sockets to overcome an
                    187:                 * inadequacy of the UDP socket interface, but for backwards
                    188:                 * compatibility we avoid the problem here rather than
1.13      mycroft   189:                 * fixing the interface.  Maybe 4.5BSD will remedy this?)
1.4       hpeyerl   190:                 */
1.13      mycroft   191:
1.4       hpeyerl   192:                /*
                    193:                 * Construct sockaddr format source address.
                    194:                 */
1.34      mycroft   195:                udpsrc.sin_family = AF_INET;
                    196:                udpsrc.sin_len = sizeof(struct sockaddr_in);
1.36      mycroft   197:                udpsrc.sin_addr = ip->ip_src;
1.34      mycroft   198:                udpsrc.sin_port = uh->uh_sport;
1.36      mycroft   199:                bzero((caddr_t)udpsrc.sin_zero, sizeof(udpsrc.sin_zero));
1.34      mycroft   200:
1.43      drochner  201:                iphlen += sizeof(struct udphdr);
                    202:                m->m_len -= iphlen;
                    203:                m->m_pkthdr.len -= iphlen;
                    204:                m->m_data += iphlen;
1.4       hpeyerl   205:                /*
                    206:                 * Locate pcb(s) for datagram.
                    207:                 * (Algorithm copied from raw_intr().)
                    208:                 */
                    209:                last = NULL;
1.22      cgd       210:                for (inp = udbtable.inpt_queue.cqh_first;
                    211:                    inp != (struct inpcb *)&udbtable.inpt_queue;
                    212:                    inp = inp->inp_queue.cqe_next) {
1.4       hpeyerl   213:                        if (inp->inp_lport != uh->uh_dport)
                    214:                                continue;
1.34      mycroft   215:                        if (!in_nullhost(inp->inp_laddr)) {
                    216:                                if (!in_hosteq(inp->inp_laddr, ip->ip_dst))
1.4       hpeyerl   217:                                        continue;
                    218:                        }
1.34      mycroft   219:                        if (!in_nullhost(inp->inp_faddr)) {
                    220:                                if (!in_hosteq(inp->inp_faddr, ip->ip_src) ||
1.4       hpeyerl   221:                                    inp->inp_fport != uh->uh_sport)
                    222:                                        continue;
                    223:                        }
                    224:
                    225:                        if (last != NULL) {
                    226:                                struct mbuf *n;
                    227:
                    228:                                if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
1.40      thorpej   229:                                        if (last->inp_flags & INP_CONTROLOPTS
                    230:                                            || last->inp_socket->so_options &
                    231:                                               SO_TIMESTAMP) {
                    232:                                                ip_savecontrol(last, &opts,
                    233:                                                    ip, n);
                    234:                                        }
                    235:                                        if (sbappendaddr(
                    236:                                            &last->inp_socket->so_rcv,
                    237:                                            sintosa(&udpsrc), n, opts) == 0) {
1.4       hpeyerl   238:                                                m_freem(n);
1.40      thorpej   239:                                                if (opts)
                    240:                                                        m_freem(opts);
1.13      mycroft   241:                                        } else
1.40      thorpej   242:                                                sorwakeup(last->inp_socket);
                    243:                                        opts = 0;
1.4       hpeyerl   244:                                }
                    245:                        }
1.40      thorpej   246:                        last = inp;
1.4       hpeyerl   247:                        /*
1.13      mycroft   248:                         * Don't look for additional matches if this one does
                    249:                         * not have either the SO_REUSEPORT or SO_REUSEADDR
                    250:                         * socket options set.  This heuristic avoids searching
                    251:                         * through all pcbs in the common case of a non-shared
                    252:                         * port.  It * assumes that an application will never
                    253:                         * clear these options after setting them.
1.4       hpeyerl   254:                         */
1.40      thorpej   255:                        if ((last->inp_socket->so_options &
                    256:                            (SO_REUSEPORT|SO_REUSEADDR)) == 0)
1.4       hpeyerl   257:                                break;
                    258:                }
1.6       mycroft   259:
1.4       hpeyerl   260:                if (last == NULL) {
                    261:                        /*
                    262:                         * No matching pcb found; discard datagram.
                    263:                         * (No need to send an ICMP Port Unreachable
                    264:                         * for a broadcast or multicast datgram.)
                    265:                         */
1.13      mycroft   266:                        udpstat.udps_noportbcast++;
1.4       hpeyerl   267:                        goto bad;
                    268:                }
1.40      thorpej   269:                if (last->inp_flags & INP_CONTROLOPTS ||
                    270:                    last->inp_socket->so_options & SO_TIMESTAMP)
                    271:                        ip_savecontrol(last, &opts, ip, m);
                    272:                if (sbappendaddr(&last->inp_socket->so_rcv,
                    273:                    sintosa(&udpsrc), m, opts) == 0) {
1.13      mycroft   274:                        udpstat.udps_fullsock++;
1.4       hpeyerl   275:                        goto bad;
1.13      mycroft   276:                }
1.40      thorpej   277:                sorwakeup(last->inp_socket);
1.4       hpeyerl   278:                return;
                    279:        }
1.1       cgd       280:        /*
                    281:         * Locate pcb for datagram.
                    282:         */
1.35      mycroft   283:        inp = in_pcblookup_connect(&udbtable, ip->ip_src, uh->uh_sport,
1.26      mycroft   284:            ip->ip_dst, uh->uh_dport);
                    285:        if (inp == 0) {
                    286:                ++udpstat.udps_pcbhashmiss;
1.35      mycroft   287:                inp = in_pcblookup_bind(&udbtable, ip->ip_dst, uh->uh_dport);
1.18      mycroft   288:                if (inp == 0) {
                    289:                        udpstat.udps_noport++;
                    290:                        if (m->m_flags & (M_BCAST | M_MCAST)) {
                    291:                                udpstat.udps_noportbcast++;
                    292:                                goto bad;
                    293:                        }
                    294:                        *ip = save_ip;
1.38      ws        295: #if NIPKDB > 0
                    296:                        if (checkipkdb(&ip->ip_src,
                    297:                                       uh->uh_sport,
                    298:                                       uh->uh_dport,
                    299:                                       m,
                    300:                                       iphlen + sizeof(struct udphdr),
                    301:                                       len - sizeof(struct udphdr)))
1.37      ws        302:                        /* It was a debugger connect packet, just drop it now */
                    303:                                goto bad;
                    304: #endif
1.18      mycroft   305:                        icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0);
                    306:                        return;
1.13      mycroft   307:                }
1.1       cgd       308:        }
                    309:
                    310:        /*
                    311:         * Construct sockaddr format source address.
                    312:         * Stuff source address and datagram in user buffer.
                    313:         */
1.34      mycroft   314:        udpsrc.sin_family = AF_INET;
                    315:        udpsrc.sin_len = sizeof(struct sockaddr_in);
1.36      mycroft   316:        udpsrc.sin_addr = ip->ip_src;
1.34      mycroft   317:        udpsrc.sin_port = uh->uh_sport;
1.36      mycroft   318:        bzero((caddr_t)udpsrc.sin_zero, sizeof(udpsrc.sin_zero));
1.34      mycroft   319:
1.40      thorpej   320:        if (inp->inp_flags & INP_CONTROLOPTS ||
                    321:            inp->inp_socket->so_options & SO_TIMESTAMP)
                    322:                ip_savecontrol(inp, &opts, ip, m);
1.1       cgd       323:        iphlen += sizeof(struct udphdr);
                    324:        m->m_len -= iphlen;
                    325:        m->m_pkthdr.len -= iphlen;
                    326:        m->m_data += iphlen;
1.34      mycroft   327:        if (sbappendaddr(&inp->inp_socket->so_rcv, sintosa(&udpsrc), m,
1.17      mycroft   328:            opts) == 0) {
1.1       cgd       329:                udpstat.udps_fullsock++;
                    330:                goto bad;
                    331:        }
                    332:        sorwakeup(inp->inp_socket);
                    333:        return;
                    334: bad:
                    335:        m_freem(m);
                    336:        if (opts)
                    337:                m_freem(opts);
                    338: }
                    339:
                    340: /*
                    341:  * Notify a udp user of an asynchronous error;
                    342:  * just wake up so that he can collect error status.
                    343:  */
1.7       mycroft   344: static void
1.1       cgd       345: udp_notify(inp, errno)
                    346:        register struct inpcb *inp;
1.7       mycroft   347:        int errno;
1.1       cgd       348: {
1.34      mycroft   349:
1.1       cgd       350:        inp->inp_socket->so_error = errno;
                    351:        sorwakeup(inp->inp_socket);
                    352:        sowwakeup(inp->inp_socket);
                    353: }
                    354:
1.27      christos  355: void *
                    356: udp_ctlinput(cmd, sa, v)
1.1       cgd       357:        int cmd;
                    358:        struct sockaddr *sa;
1.27      christos  359:        void *v;
1.1       cgd       360: {
1.27      christos  361:        register struct ip *ip = v;
1.1       cgd       362:        register struct udphdr *uh;
1.21      mycroft   363:        extern int inetctlerrmap[];
1.18      mycroft   364:        void (*notify) __P((struct inpcb *, int)) = udp_notify;
1.21      mycroft   365:        int errno;
1.1       cgd       366:
1.20      mycroft   367:        if ((unsigned)cmd >= PRC_NCMDS)
1.27      christos  368:                return NULL;
1.20      mycroft   369:        errno = inetctlerrmap[cmd];
1.18      mycroft   370:        if (PRC_IS_REDIRECT(cmd))
1.19      mycroft   371:                notify = in_rtchange, ip = 0;
1.18      mycroft   372:        else if (cmd == PRC_HOSTDEAD)
1.19      mycroft   373:                ip = 0;
1.23      cgd       374:        else if (errno == 0)
1.27      christos  375:                return NULL;
1.19      mycroft   376:        if (ip) {
1.1       cgd       377:                uh = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2));
1.34      mycroft   378:                in_pcbnotify(&udbtable, satosin(sa)->sin_addr, uh->uh_dport,
                    379:                    ip->ip_src, uh->uh_sport, errno, notify);
1.19      mycroft   380:        } else
1.34      mycroft   381:                in_pcbnotifyall(&udbtable, satosin(sa)->sin_addr, errno,
                    382:                    notify);
1.27      christos  383:        return NULL;
1.1       cgd       384: }
                    385:
1.7       mycroft   386: int
1.27      christos  387: #if __STDC__
                    388: udp_output(struct mbuf *m, ...)
                    389: #else
                    390: udp_output(m, va_alist)
                    391:        struct mbuf *m;
                    392:        va_dcl
                    393: #endif
                    394: {
1.1       cgd       395:        register struct inpcb *inp;
                    396:        register struct udpiphdr *ui;
                    397:        register int len = m->m_pkthdr.len;
1.31      mycroft   398:        int error = 0;
1.27      christos  399:        va_list ap;
                    400:
                    401:        va_start(ap, m);
                    402:        inp = va_arg(ap, struct inpcb *);
                    403:        va_end(ap);
1.1       cgd       404:
                    405:        /*
                    406:         * Calculate data length and get a mbuf
                    407:         * for UDP and IP headers.
                    408:         */
1.13      mycroft   409:        M_PREPEND(m, sizeof(struct udpiphdr), M_DONTWAIT);
                    410:        if (m == 0) {
                    411:                error = ENOBUFS;
1.39      thorpej   412:                goto release;
                    413:        }
                    414:
                    415:        /*
                    416:         * Compute the packet length of the IP header, and
                    417:         * punt if the length looks bogus.
                    418:         */
                    419:        if ((len + sizeof(struct udpiphdr)) > IP_MAXPACKET) {
                    420:                error = EMSGSIZE;
1.13      mycroft   421:                goto release;
                    422:        }
1.1       cgd       423:
                    424:        /*
                    425:         * Fill in mbuf with extended UDP header
                    426:         * and addresses and length put into network format.
                    427:         */
                    428:        ui = mtod(m, struct udpiphdr *);
1.25      cgd       429:        bzero(ui->ui_x1, sizeof ui->ui_x1);
1.1       cgd       430:        ui->ui_pr = IPPROTO_UDP;
1.15      cgd       431:        ui->ui_len = htons((u_int16_t)len + sizeof (struct udphdr));
1.1       cgd       432:        ui->ui_src = inp->inp_laddr;
                    433:        ui->ui_dst = inp->inp_faddr;
                    434:        ui->ui_sport = inp->inp_lport;
                    435:        ui->ui_dport = inp->inp_fport;
                    436:        ui->ui_ulen = ui->ui_len;
                    437:
                    438:        /*
                    439:         * Stuff checksum and output datagram.
                    440:         */
                    441:        ui->ui_sum = 0;
                    442:        if (udpcksum) {
                    443:            if ((ui->ui_sum = in_cksum(m, sizeof (struct udpiphdr) + len)) == 0)
                    444:                ui->ui_sum = 0xffff;
                    445:        }
                    446:        ((struct ip *)ui)->ip_len = sizeof (struct udpiphdr) + len;
                    447:        ((struct ip *)ui)->ip_ttl = inp->inp_ip.ip_ttl; /* XXX */
                    448:        ((struct ip *)ui)->ip_tos = inp->inp_ip.ip_tos; /* XXX */
                    449:        udpstat.udps_opackets++;
1.31      mycroft   450:        return (ip_output(m, inp->inp_options, &inp->inp_route,
1.12      mycroft   451:            inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST),
1.31      mycroft   452:            inp->inp_moptions));
1.1       cgd       453:
                    454: release:
                    455:        m_freem(m);
                    456:        return (error);
                    457: }
                    458:
1.42      thorpej   459: int    udp_sendspace = 9216;           /* really max datagram size */
                    460: int    udp_recvspace = 40 * (1024 + sizeof(struct sockaddr_in));
1.1       cgd       461:                                        /* 40 1K datagrams */
                    462:
                    463: /*ARGSUSED*/
1.7       mycroft   464: int
1.31      mycroft   465: udp_usrreq(so, req, m, nam, control, p)
1.1       cgd       466:        struct socket *so;
                    467:        int req;
1.31      mycroft   468:        struct mbuf *m, *nam, *control;
1.30      mycroft   469:        struct proc *p;
1.1       cgd       470: {
1.31      mycroft   471:        register struct inpcb *inp;
1.1       cgd       472:        int s;
1.31      mycroft   473:        register int error = 0;
1.1       cgd       474:
                    475:        if (req == PRU_CONTROL)
1.31      mycroft   476:                return (in_control(so, (long)m, (caddr_t)nam,
1.30      mycroft   477:                    (struct ifnet *)control, p));
1.31      mycroft   478:
                    479:        s = splsoftnet();
                    480:        inp = sotoinpcb(so);
1.32      mycroft   481: #ifdef DIAGNOSTIC
                    482:        if (req != PRU_SEND && req != PRU_SENDOOB && control)
                    483:                panic("udp_usrreq: unexpected control mbuf");
                    484: #endif
1.31      mycroft   485:        if (inp == 0 && req != PRU_ATTACH) {
                    486:                error = EINVAL;
                    487:                goto release;
                    488:        }
                    489:
1.1       cgd       490:        /*
                    491:         * Note: need to block udp_input while changing
                    492:         * the udp pcb queue and/or pcb addresses.
                    493:         */
                    494:        switch (req) {
                    495:
                    496:        case PRU_ATTACH:
1.31      mycroft   497:                if (inp != 0) {
                    498:                        error = EISCONN;
1.1       cgd       499:                        break;
                    500:                }
1.31      mycroft   501:                if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
                    502:                        error = soreserve(so, udp_sendspace, udp_recvspace);
                    503:                        if (error)
                    504:                                break;
                    505:                }
1.18      mycroft   506:                error = in_pcballoc(so, &udbtable);
1.1       cgd       507:                if (error)
                    508:                        break;
1.31      mycroft   509:                inp = sotoinpcb(so);
                    510:                inp->inp_ip.ip_ttl = ip_defttl;
1.1       cgd       511:                break;
                    512:
                    513:        case PRU_DETACH:
1.31      mycroft   514:                in_pcbdetach(inp);
1.1       cgd       515:                break;
                    516:
                    517:        case PRU_BIND:
1.31      mycroft   518:                error = in_pcbbind(inp, nam, p);
1.1       cgd       519:                break;
                    520:
                    521:        case PRU_LISTEN:
                    522:                error = EOPNOTSUPP;
                    523:                break;
                    524:
                    525:        case PRU_CONNECT:
1.31      mycroft   526:                error = in_pcbconnect(inp, nam);
                    527:                if (error)
1.1       cgd       528:                        break;
1.31      mycroft   529:                soisconnected(so);
1.1       cgd       530:                break;
                    531:
                    532:        case PRU_CONNECT2:
                    533:                error = EOPNOTSUPP;
                    534:                break;
                    535:
                    536:        case PRU_DISCONNECT:
1.31      mycroft   537:                /*soisdisconnected(so);*/
                    538:                so->so_state &= ~SS_ISCONNECTED;        /* XXX */
1.1       cgd       539:                in_pcbdisconnect(inp);
1.34      mycroft   540:                inp->inp_laddr = zeroin_addr;           /* XXX */
1.35      mycroft   541:                in_pcbstate(inp, INP_BOUND);            /* XXX */
1.1       cgd       542:                break;
                    543:
                    544:        case PRU_SHUTDOWN:
                    545:                socantsendmore(so);
                    546:                break;
                    547:
1.31      mycroft   548:        case PRU_RCVD:
                    549:                error = EOPNOTSUPP;
1.1       cgd       550:                break;
                    551:
1.31      mycroft   552:        case PRU_SEND:
1.32      mycroft   553:                if (control && control->m_len) {
                    554:                        m_freem(control);
                    555:                        m_freem(m);
                    556:                        error = EINVAL;
                    557:                        break;
                    558:                }
1.31      mycroft   559:        {
1.35      mycroft   560:                struct in_addr laddr;                   /* XXX */
1.1       cgd       561:
1.31      mycroft   562:                if (nam) {
1.35      mycroft   563:                        laddr = inp->inp_laddr;         /* XXX */
1.31      mycroft   564:                        if ((so->so_state & SS_ISCONNECTED) != 0) {
                    565:                                error = EISCONN;
1.32      mycroft   566:                                goto die;
1.31      mycroft   567:                        }
                    568:                        error = in_pcbconnect(inp, nam);
1.32      mycroft   569:                        if (error) {
                    570:                        die:
                    571:                                m_freem(m);
1.31      mycroft   572:                                break;
1.32      mycroft   573:                        }
1.31      mycroft   574:                } else {
                    575:                        if ((so->so_state & SS_ISCONNECTED) == 0) {
                    576:                                error = ENOTCONN;
1.32      mycroft   577:                                goto die;
1.31      mycroft   578:                        }
                    579:                }
1.33      mycroft   580:                error = udp_output(m, inp);
1.31      mycroft   581:                if (nam) {
                    582:                        in_pcbdisconnect(inp);
1.35      mycroft   583:                        inp->inp_laddr = laddr;         /* XXX */
                    584:                        in_pcbstate(inp, INP_BOUND);    /* XXX */
1.31      mycroft   585:                }
                    586:        }
1.1       cgd       587:                break;
                    588:
                    589:        case PRU_SENSE:
                    590:                /*
                    591:                 * stat: don't bother with a blocksize.
                    592:                 */
1.31      mycroft   593:                splx(s);
1.1       cgd       594:                return (0);
                    595:
1.31      mycroft   596:        case PRU_RCVOOB:
                    597:                error =  EOPNOTSUPP;
                    598:                break;
                    599:
1.1       cgd       600:        case PRU_SENDOOB:
1.32      mycroft   601:                m_freem(control);
1.31      mycroft   602:                m_freem(m);
1.1       cgd       603:                error =  EOPNOTSUPP;
                    604:                break;
                    605:
1.31      mycroft   606:        case PRU_SOCKADDR:
                    607:                in_setsockaddr(inp, nam);
                    608:                break;
                    609:
                    610:        case PRU_PEERADDR:
                    611:                in_setpeeraddr(inp, nam);
                    612:                break;
1.1       cgd       613:
                    614:        default:
                    615:                panic("udp_usrreq");
                    616:        }
                    617:
                    618: release:
1.31      mycroft   619:        splx(s);
1.1       cgd       620:        return (error);
1.13      mycroft   621: }
                    622:
                    623: /*
                    624:  * Sysctl for udp variables.
                    625:  */
1.27      christos  626: int
1.13      mycroft   627: udp_sysctl(name, namelen, oldp, oldlenp, newp, newlen)
                    628:        int *name;
                    629:        u_int namelen;
                    630:        void *oldp;
                    631:        size_t *oldlenp;
                    632:        void *newp;
                    633:        size_t newlen;
                    634: {
                    635:        /* All sysctl names at this level are terminal. */
                    636:        if (namelen != 1)
                    637:                return (ENOTDIR);
                    638:
                    639:        switch (name[0]) {
                    640:        case UDPCTL_CHECKSUM:
                    641:                return (sysctl_int(oldp, oldlenp, newp, newlen, &udpcksum));
1.42      thorpej   642:        case UDPCTL_SENDSPACE:
                    643:                return (sysctl_int(oldp, oldlenp, newp, newlen,
                    644:                    &udp_sendspace));
                    645:        case UDPCTL_RECVSPACE:
                    646:                return (sysctl_int(oldp, oldlenp, newp, newlen,
                    647:                    &udp_recvspace));
1.13      mycroft   648:        default:
                    649:                return (ENOPROTOOPT);
                    650:        }
                    651:        /* NOTREACHED */
1.1       cgd       652: }

CVSweb <webmaster@jp.NetBSD.org>