Annotation of src/sys/netinet/udp_usrreq.c, Revision 1.49
1.49 ! drochner 1: /* $NetBSD: udp_usrreq.c,v 1.48 1999/07/01 08:12:52 itojun Exp $ */
1.48 itojun 2:
3: /*
4: * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
5: * All rights reserved.
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. 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.
18: *
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: /*
1.44 thorpej 33: * Copyright (c) 1982, 1986, 1988, 1990, 1993, 1995
1.13 mycroft 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.
44: * 3. All advertising materials mentioning features or use of this software
45: * must display the following acknowledgement:
46: * This product includes software developed by the University of
47: * California, Berkeley and its contributors.
48: * 4. Neither the name of the University nor the names of its contributors
49: * may be used to endorse or promote products derived from this software
50: * without specific prior written permission.
51: *
52: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
53: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
54: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
55: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
56: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
57: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
58: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
59: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
60: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
61: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
62: * SUCH DAMAGE.
63: *
1.44 thorpej 64: * @(#)udp_usrreq.c 8.6 (Berkeley) 5/23/95
1.1 cgd 65: */
1.38 ws 66: #include "ipkdb.h"
1.1 cgd 67:
1.48 itojun 68: /* XXX MAPPED_ADDR_ENABLED should be revisited */
69:
1.5 mycroft 70: #include <sys/param.h>
71: #include <sys/malloc.h>
72: #include <sys/mbuf.h>
1.48 itojun 73: #ifdef MAPPED_ADDR_ENABLED
74: #include <sys/domain.h>
75: #endif /* MAPPED_ADDR_ENABLED */
1.5 mycroft 76: #include <sys/protosw.h>
77: #include <sys/socket.h>
78: #include <sys/socketvar.h>
1.13 mycroft 79: #include <sys/errno.h>
1.5 mycroft 80: #include <sys/stat.h>
1.27 christos 81: #include <sys/systm.h>
82: #include <sys/proc.h>
83:
84: #include <vm/vm.h>
85: #include <sys/sysctl.h>
1.1 cgd 86:
1.5 mycroft 87: #include <net/if.h>
88: #include <net/route.h>
1.1 cgd 89:
1.5 mycroft 90: #include <netinet/in.h>
91: #include <netinet/in_systm.h>
1.15 cgd 92: #include <netinet/in_var.h>
1.5 mycroft 93: #include <netinet/ip.h>
94: #include <netinet/in_pcb.h>
95: #include <netinet/ip_var.h>
96: #include <netinet/ip_icmp.h>
97: #include <netinet/udp.h>
98: #include <netinet/udp_var.h>
1.1 cgd 99:
1.27 christos 100: #include <machine/stdarg.h>
101:
1.48 itojun 102: #ifdef IPSEC
103: #include <netinet6/ipsec.h>
104: #include <netkey/key.h>
105: #include <netkey/key_debug.h>
106: #endif /*IPSEC*/
107:
1.8 mycroft 108: /*
109: * UDP protocol implementation.
110: * Per RFC 768, August, 1980.
111: */
112: #ifndef COMPAT_42
113: int udpcksum = 1;
114: #else
115: int udpcksum = 0; /* XXX */
116: #endif
117:
1.13 mycroft 118: static void udp_notify __P((struct inpcb *, int));
1.7 mycroft 119:
1.26 mycroft 120: #ifndef UDBHASHSIZE
121: #define UDBHASHSIZE 128
122: #endif
123: int udbhashsize = UDBHASHSIZE;
124:
1.7 mycroft 125: void
1.1 cgd 126: udp_init()
127: {
1.18 mycroft 128:
1.35 mycroft 129: in_pcbinit(&udbtable, udbhashsize, udbhashsize);
1.1 cgd 130: }
131:
1.7 mycroft 132: void
1.27 christos 133: #if __STDC__
134: udp_input(struct mbuf *m, ...)
135: #else
136: udp_input(m, va_alist)
137: struct mbuf *m;
138: va_dcl
139: #endif
1.1 cgd 140: {
1.48 itojun 141: int proto;
1.1 cgd 142: register struct ip *ip;
143: register struct udphdr *uh;
144: register struct inpcb *inp;
145: struct mbuf *opts = 0;
146: int len;
147: struct ip save_ip;
1.27 christos 148: int iphlen;
149: va_list ap;
1.34 mycroft 150: struct sockaddr_in udpsrc;
1.48 itojun 151: #ifdef MAPPED_ADDR_ENABLED
152: struct sockaddr_in6 mapped;
153: #endif
154: struct sockaddr *sa;
1.27 christos 155:
156: va_start(ap, m);
157: iphlen = va_arg(ap, int);
1.48 itojun 158: proto = va_arg(ap, int);
1.27 christos 159: va_end(ap);
1.1 cgd 160:
161: udpstat.udps_ipackets++;
162:
163: /*
164: * Strip IP options, if any; should skip this,
165: * make available to user, and use on returned packets,
166: * but we don't yet have a way to check the checksum
167: * with options still present.
168: */
169: if (iphlen > sizeof (struct ip)) {
170: ip_stripoptions(m, (struct mbuf *)0);
171: iphlen = sizeof(struct ip);
172: }
173:
174: /*
175: * Get IP and UDP header together in first mbuf.
176: */
177: ip = mtod(m, struct ip *);
178: if (m->m_len < iphlen + sizeof(struct udphdr)) {
179: if ((m = m_pullup(m, iphlen + sizeof(struct udphdr))) == 0) {
180: udpstat.udps_hdrops++;
181: return;
182: }
183: ip = mtod(m, struct ip *);
184: }
185: uh = (struct udphdr *)((caddr_t)ip + iphlen);
186:
187: /*
188: * Make mbuf data length reflect UDP length.
189: * If not enough data to reflect UDP length, drop.
190: */
1.15 cgd 191: len = ntohs((u_int16_t)uh->uh_ulen);
1.47 mycroft 192: if (ip->ip_len != iphlen + len) {
193: if (ip->ip_len < iphlen + len) {
1.1 cgd 194: udpstat.udps_badlen++;
195: goto bad;
196: }
1.47 mycroft 197: m_adj(m, iphlen + len - ip->ip_len);
1.1 cgd 198: }
199: /*
200: * Save a copy of the IP header in case we want restore it
201: * for sending an ICMP error message in response.
202: */
203: save_ip = *ip;
204:
205: /*
206: * Checksum extended UDP header and data.
207: */
1.29 mrg 208: if (uh->uh_sum) {
1.25 cgd 209: bzero(((struct ipovly *)ip)->ih_x1,
210: sizeof ((struct ipovly *)ip)->ih_x1);
1.1 cgd 211: ((struct ipovly *)ip)->ih_len = uh->uh_ulen;
1.46 mycroft 212: if (in_cksum(m, len + sizeof (struct ip)) != 0) {
1.1 cgd 213: udpstat.udps_badsum++;
214: m_freem(m);
215: return;
216: }
217: }
1.13 mycroft 218:
1.48 itojun 219: /*
220: * Construct sockaddr format source address.
221: */
222: udpsrc.sin_family = AF_INET;
223: udpsrc.sin_len = sizeof(struct sockaddr_in);
224: udpsrc.sin_addr = ip->ip_src;
225: udpsrc.sin_port = uh->uh_sport;
226: bzero((caddr_t)udpsrc.sin_zero, sizeof(udpsrc.sin_zero));
227:
1.16 mycroft 228: if (IN_MULTICAST(ip->ip_dst.s_addr) ||
1.13 mycroft 229: in_broadcast(ip->ip_dst, m->m_pkthdr.rcvif)) {
1.40 thorpej 230: struct inpcb *last;
1.4 hpeyerl 231: /*
232: * Deliver a multicast or broadcast datagram to *all* sockets
233: * for which the local and remote addresses and ports match
234: * those of the incoming datagram. This allows more than
235: * one process to receive multi/broadcasts on the same port.
236: * (This really ought to be done for unicast datagrams as
237: * well, but that would cause problems with existing
238: * applications that open both address-specific sockets and
239: * a wildcard socket listening to the same port -- they would
240: * end up receiving duplicates of every unicast datagram.
241: * Those applications open the multiple sockets to overcome an
242: * inadequacy of the UDP socket interface, but for backwards
243: * compatibility we avoid the problem here rather than
1.13 mycroft 244: * fixing the interface. Maybe 4.5BSD will remedy this?)
1.4 hpeyerl 245: */
1.13 mycroft 246:
1.48 itojun 247: iphlen += sizeof(struct udphdr);
1.4 hpeyerl 248: /*
1.48 itojun 249: * KAME note: usually we drop udpiphdr from mbuf here.
250: * we need udpiphdr for iPsec processing so we do that later.
1.4 hpeyerl 251: */
252: /*
253: * Locate pcb(s) for datagram.
254: * (Algorithm copied from raw_intr().)
255: */
256: last = NULL;
1.22 cgd 257: for (inp = udbtable.inpt_queue.cqh_first;
258: inp != (struct inpcb *)&udbtable.inpt_queue;
259: inp = inp->inp_queue.cqe_next) {
1.4 hpeyerl 260: if (inp->inp_lport != uh->uh_dport)
261: continue;
1.34 mycroft 262: if (!in_nullhost(inp->inp_laddr)) {
263: if (!in_hosteq(inp->inp_laddr, ip->ip_dst))
1.4 hpeyerl 264: continue;
265: }
1.34 mycroft 266: if (!in_nullhost(inp->inp_faddr)) {
267: if (!in_hosteq(inp->inp_faddr, ip->ip_src) ||
1.4 hpeyerl 268: inp->inp_fport != uh->uh_sport)
269: continue;
270: }
271:
272: if (last != NULL) {
273: struct mbuf *n;
274:
1.48 itojun 275: #ifdef IPSEC
276: /* check AH/ESP integrity. */
277: if (last != NULL && ipsec4_in_reject(m, last)) {
278: ipsecstat.in_polvio++;
279: /* do not inject data to pcb */
280: } else
281: #endif /*IPSEC*/
1.4 hpeyerl 282: if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
1.40 thorpej 283: if (last->inp_flags & INP_CONTROLOPTS
284: || last->inp_socket->so_options &
285: SO_TIMESTAMP) {
286: ip_savecontrol(last, &opts,
287: ip, n);
288: }
1.49 ! drochner 289: m_adj(n, iphlen);
1.48 itojun 290: sa = (struct sockaddr *)&udpsrc;
291: #ifdef MAPPED_ADDR_ENABLED
1.49 ! drochner 292: if (last->inp_socket->so_proto->
! 293: pr_domain->dom_family == AF_INET6) {
1.48 itojun 294: in6_sin_2_v4mapsin6(&udpsrc,
295: &mapped);
296: sa = (struct sockaddr *)&mapped;
297: }
298: #endif /* MAPPED_ADDR_ENABLED */
1.40 thorpej 299: if (sbappendaddr(
300: &last->inp_socket->so_rcv,
1.48 itojun 301: sa, n, opts) == 0) {
1.4 hpeyerl 302: m_freem(n);
1.40 thorpej 303: if (opts)
304: m_freem(opts);
1.13 mycroft 305: } else
1.40 thorpej 306: sorwakeup(last->inp_socket);
307: opts = 0;
1.4 hpeyerl 308: }
309: }
1.40 thorpej 310: last = inp;
1.4 hpeyerl 311: /*
1.13 mycroft 312: * Don't look for additional matches if this one does
313: * not have either the SO_REUSEPORT or SO_REUSEADDR
314: * socket options set. This heuristic avoids searching
315: * through all pcbs in the common case of a non-shared
316: * port. It * assumes that an application will never
317: * clear these options after setting them.
1.4 hpeyerl 318: */
1.40 thorpej 319: if ((last->inp_socket->so_options &
320: (SO_REUSEPORT|SO_REUSEADDR)) == 0)
1.4 hpeyerl 321: break;
322: }
1.6 mycroft 323:
1.4 hpeyerl 324: if (last == NULL) {
325: /*
326: * No matching pcb found; discard datagram.
327: * (No need to send an ICMP Port Unreachable
328: * for a broadcast or multicast datgram.)
329: */
1.48 itojun 330: udpstat.udps_noport++;
1.13 mycroft 331: udpstat.udps_noportbcast++;
1.4 hpeyerl 332: goto bad;
333: }
1.48 itojun 334: #ifdef IPSEC
335: /* check AH/ESP integrity. */
336: if (last != NULL && ipsec4_in_reject(m, last)) {
337: ipsecstat.in_polvio++;
338: goto bad;
339: }
340: #endif /*IPSEC*/
1.40 thorpej 341: if (last->inp_flags & INP_CONTROLOPTS ||
342: last->inp_socket->so_options & SO_TIMESTAMP)
343: ip_savecontrol(last, &opts, ip, m);
1.49 ! drochner 344: m->m_len -= iphlen;
! 345: m->m_pkthdr.len -= iphlen;
! 346: m->m_data += iphlen;
1.48 itojun 347: sa = (struct sockaddr *)&udpsrc;
348: #ifdef MAPPED_ADDR_ENABLED
349: if (last->inp_socket->so_proto->pr_domain->dom_family ==
350: AF_INET6) {
351: in6_sin_2_v4mapsin6(&udpsrc, &mapped);
352: sa = (struct sockaddr *)&mapped;
353: }
354: #endif /* MAPPED_ADDR_ENABLED */
355: if (sbappendaddr(&last->inp_socket->so_rcv, sa, m, opts) == 0) {
1.13 mycroft 356: udpstat.udps_fullsock++;
1.4 hpeyerl 357: goto bad;
1.13 mycroft 358: }
1.40 thorpej 359: sorwakeup(last->inp_socket);
1.4 hpeyerl 360: return;
361: }
1.1 cgd 362: /*
363: * Locate pcb for datagram.
364: */
1.35 mycroft 365: inp = in_pcblookup_connect(&udbtable, ip->ip_src, uh->uh_sport,
1.26 mycroft 366: ip->ip_dst, uh->uh_dport);
367: if (inp == 0) {
368: ++udpstat.udps_pcbhashmiss;
1.35 mycroft 369: inp = in_pcblookup_bind(&udbtable, ip->ip_dst, uh->uh_dport);
1.18 mycroft 370: if (inp == 0) {
371: udpstat.udps_noport++;
372: if (m->m_flags & (M_BCAST | M_MCAST)) {
373: udpstat.udps_noportbcast++;
374: goto bad;
375: }
376: *ip = save_ip;
1.38 ws 377: #if NIPKDB > 0
378: if (checkipkdb(&ip->ip_src,
379: uh->uh_sport,
380: uh->uh_dport,
381: m,
382: iphlen + sizeof(struct udphdr),
383: len - sizeof(struct udphdr)))
1.37 ws 384: /* It was a debugger connect packet, just drop it now */
385: goto bad;
386: #endif
1.18 mycroft 387: icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0);
388: return;
1.13 mycroft 389: }
1.1 cgd 390: }
1.48 itojun 391: #ifdef IPSEC
392: if (inp != NULL && ipsec4_in_reject(m, inp)) {
393: ipsecstat.in_polvio++;
394: goto bad;
395: }
396: #endif /*IPSEC*/
1.1 cgd 397:
398: /*
399: * Stuff source address and datagram in user buffer.
400: */
1.40 thorpej 401: if (inp->inp_flags & INP_CONTROLOPTS ||
402: inp->inp_socket->so_options & SO_TIMESTAMP)
403: ip_savecontrol(inp, &opts, ip, m);
1.1 cgd 404: iphlen += sizeof(struct udphdr);
405: m->m_len -= iphlen;
406: m->m_pkthdr.len -= iphlen;
407: m->m_data += iphlen;
1.48 itojun 408: sa = (struct sockaddr *)&udpsrc;
409: #ifdef MAPPED_ADDR_ENABLED
410: if (inp->inp_socket->so_proto->pr_domain->dom_family == AF_INET6) {
411: in6_sin_2_v4mapsin6(&udpsrc, &mapped);
412: sa = (struct sockaddr *)&mapped;
413: }
414: #endif /* MAPPED_ADDR_ENABLED */
415: if (sbappendaddr(&inp->inp_socket->so_rcv, sa, m, opts) == 0) {
1.1 cgd 416: udpstat.udps_fullsock++;
417: goto bad;
418: }
419: sorwakeup(inp->inp_socket);
420: return;
421: bad:
422: m_freem(m);
423: if (opts)
424: m_freem(opts);
425: }
426:
427: /*
428: * Notify a udp user of an asynchronous error;
429: * just wake up so that he can collect error status.
430: */
1.7 mycroft 431: static void
1.1 cgd 432: udp_notify(inp, errno)
433: register struct inpcb *inp;
1.7 mycroft 434: int errno;
1.1 cgd 435: {
1.34 mycroft 436:
1.1 cgd 437: inp->inp_socket->so_error = errno;
438: sorwakeup(inp->inp_socket);
439: sowwakeup(inp->inp_socket);
440: }
441:
1.27 christos 442: void *
443: udp_ctlinput(cmd, sa, v)
1.1 cgd 444: int cmd;
445: struct sockaddr *sa;
1.27 christos 446: void *v;
1.1 cgd 447: {
1.27 christos 448: register struct ip *ip = v;
1.1 cgd 449: register struct udphdr *uh;
1.21 mycroft 450: extern int inetctlerrmap[];
1.18 mycroft 451: void (*notify) __P((struct inpcb *, int)) = udp_notify;
1.21 mycroft 452: int errno;
1.1 cgd 453:
1.20 mycroft 454: if ((unsigned)cmd >= PRC_NCMDS)
1.27 christos 455: return NULL;
1.20 mycroft 456: errno = inetctlerrmap[cmd];
1.18 mycroft 457: if (PRC_IS_REDIRECT(cmd))
1.19 mycroft 458: notify = in_rtchange, ip = 0;
1.18 mycroft 459: else if (cmd == PRC_HOSTDEAD)
1.19 mycroft 460: ip = 0;
1.23 cgd 461: else if (errno == 0)
1.27 christos 462: return NULL;
1.19 mycroft 463: if (ip) {
1.1 cgd 464: uh = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2));
1.34 mycroft 465: in_pcbnotify(&udbtable, satosin(sa)->sin_addr, uh->uh_dport,
466: ip->ip_src, uh->uh_sport, errno, notify);
1.19 mycroft 467: } else
1.34 mycroft 468: in_pcbnotifyall(&udbtable, satosin(sa)->sin_addr, errno,
469: notify);
1.27 christos 470: return NULL;
1.1 cgd 471: }
472:
1.7 mycroft 473: int
1.27 christos 474: #if __STDC__
475: udp_output(struct mbuf *m, ...)
476: #else
477: udp_output(m, va_alist)
478: struct mbuf *m;
479: va_dcl
480: #endif
481: {
1.1 cgd 482: register struct inpcb *inp;
483: register struct udpiphdr *ui;
484: register int len = m->m_pkthdr.len;
1.31 mycroft 485: int error = 0;
1.27 christos 486: va_list ap;
487:
488: va_start(ap, m);
489: inp = va_arg(ap, struct inpcb *);
490: va_end(ap);
1.1 cgd 491:
492: /*
493: * Calculate data length and get a mbuf
494: * for UDP and IP headers.
495: */
1.13 mycroft 496: M_PREPEND(m, sizeof(struct udpiphdr), M_DONTWAIT);
497: if (m == 0) {
498: error = ENOBUFS;
1.39 thorpej 499: goto release;
500: }
501:
502: /*
503: * Compute the packet length of the IP header, and
504: * punt if the length looks bogus.
505: */
506: if ((len + sizeof(struct udpiphdr)) > IP_MAXPACKET) {
507: error = EMSGSIZE;
1.13 mycroft 508: goto release;
509: }
1.1 cgd 510:
511: /*
512: * Fill in mbuf with extended UDP header
513: * and addresses and length put into network format.
514: */
515: ui = mtod(m, struct udpiphdr *);
1.25 cgd 516: bzero(ui->ui_x1, sizeof ui->ui_x1);
1.1 cgd 517: ui->ui_pr = IPPROTO_UDP;
1.15 cgd 518: ui->ui_len = htons((u_int16_t)len + sizeof (struct udphdr));
1.1 cgd 519: ui->ui_src = inp->inp_laddr;
520: ui->ui_dst = inp->inp_faddr;
521: ui->ui_sport = inp->inp_lport;
522: ui->ui_dport = inp->inp_fport;
523: ui->ui_ulen = ui->ui_len;
524:
525: /*
526: * Stuff checksum and output datagram.
527: */
528: ui->ui_sum = 0;
529: if (udpcksum) {
530: if ((ui->ui_sum = in_cksum(m, sizeof (struct udpiphdr) + len)) == 0)
531: ui->ui_sum = 0xffff;
532: }
533: ((struct ip *)ui)->ip_len = sizeof (struct udpiphdr) + len;
534: ((struct ip *)ui)->ip_ttl = inp->inp_ip.ip_ttl; /* XXX */
535: ((struct ip *)ui)->ip_tos = inp->inp_ip.ip_tos; /* XXX */
536: udpstat.udps_opackets++;
1.48 itojun 537:
538: #ifdef IPSEC
539: m->m_pkthdr.rcvif = (struct ifnet *)inp->inp_socket;
540: #endif /*IPSEC*/
541:
1.31 mycroft 542: return (ip_output(m, inp->inp_options, &inp->inp_route,
1.12 mycroft 543: inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST),
1.31 mycroft 544: inp->inp_moptions));
1.1 cgd 545:
546: release:
547: m_freem(m);
548: return (error);
549: }
550:
1.42 thorpej 551: int udp_sendspace = 9216; /* really max datagram size */
552: int udp_recvspace = 40 * (1024 + sizeof(struct sockaddr_in));
1.1 cgd 553: /* 40 1K datagrams */
554:
555: /*ARGSUSED*/
1.7 mycroft 556: int
1.31 mycroft 557: udp_usrreq(so, req, m, nam, control, p)
1.1 cgd 558: struct socket *so;
559: int req;
1.31 mycroft 560: struct mbuf *m, *nam, *control;
1.30 mycroft 561: struct proc *p;
1.1 cgd 562: {
1.31 mycroft 563: register struct inpcb *inp;
1.1 cgd 564: int s;
1.31 mycroft 565: register int error = 0;
1.1 cgd 566:
567: if (req == PRU_CONTROL)
1.31 mycroft 568: return (in_control(so, (long)m, (caddr_t)nam,
1.30 mycroft 569: (struct ifnet *)control, p));
1.31 mycroft 570:
571: s = splsoftnet();
572: inp = sotoinpcb(so);
1.32 mycroft 573: #ifdef DIAGNOSTIC
574: if (req != PRU_SEND && req != PRU_SENDOOB && control)
575: panic("udp_usrreq: unexpected control mbuf");
576: #endif
1.31 mycroft 577: if (inp == 0 && req != PRU_ATTACH) {
578: error = EINVAL;
579: goto release;
580: }
581:
1.1 cgd 582: /*
583: * Note: need to block udp_input while changing
584: * the udp pcb queue and/or pcb addresses.
585: */
586: switch (req) {
587:
588: case PRU_ATTACH:
1.31 mycroft 589: if (inp != 0) {
590: error = EISCONN;
1.1 cgd 591: break;
592: }
1.31 mycroft 593: if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
594: error = soreserve(so, udp_sendspace, udp_recvspace);
595: if (error)
596: break;
597: }
1.18 mycroft 598: error = in_pcballoc(so, &udbtable);
1.1 cgd 599: if (error)
600: break;
1.31 mycroft 601: inp = sotoinpcb(so);
602: inp->inp_ip.ip_ttl = ip_defttl;
1.48 itojun 603: #ifdef IPSEC
604: inp = (struct inpcb *)so->so_pcb;
605: error = ipsec_init_policy(&inp->inp_sp);
606: #endif /*IPSEC*/
1.1 cgd 607: break;
608:
609: case PRU_DETACH:
1.31 mycroft 610: in_pcbdetach(inp);
1.1 cgd 611: break;
612:
613: case PRU_BIND:
1.31 mycroft 614: error = in_pcbbind(inp, nam, p);
1.1 cgd 615: break;
616:
617: case PRU_LISTEN:
618: error = EOPNOTSUPP;
619: break;
620:
621: case PRU_CONNECT:
1.31 mycroft 622: error = in_pcbconnect(inp, nam);
623: if (error)
1.1 cgd 624: break;
1.31 mycroft 625: soisconnected(so);
1.1 cgd 626: break;
627:
628: case PRU_CONNECT2:
629: error = EOPNOTSUPP;
630: break;
631:
632: case PRU_DISCONNECT:
1.31 mycroft 633: /*soisdisconnected(so);*/
634: so->so_state &= ~SS_ISCONNECTED; /* XXX */
1.1 cgd 635: in_pcbdisconnect(inp);
1.34 mycroft 636: inp->inp_laddr = zeroin_addr; /* XXX */
1.35 mycroft 637: in_pcbstate(inp, INP_BOUND); /* XXX */
1.1 cgd 638: break;
639:
640: case PRU_SHUTDOWN:
641: socantsendmore(so);
642: break;
643:
1.31 mycroft 644: case PRU_RCVD:
645: error = EOPNOTSUPP;
1.1 cgd 646: break;
647:
1.31 mycroft 648: case PRU_SEND:
1.32 mycroft 649: if (control && control->m_len) {
650: m_freem(control);
651: m_freem(m);
652: error = EINVAL;
653: break;
654: }
1.31 mycroft 655: {
1.35 mycroft 656: struct in_addr laddr; /* XXX */
1.1 cgd 657:
1.31 mycroft 658: if (nam) {
1.35 mycroft 659: laddr = inp->inp_laddr; /* XXX */
1.31 mycroft 660: if ((so->so_state & SS_ISCONNECTED) != 0) {
661: error = EISCONN;
1.32 mycroft 662: goto die;
1.31 mycroft 663: }
664: error = in_pcbconnect(inp, nam);
1.32 mycroft 665: if (error) {
666: die:
667: m_freem(m);
1.31 mycroft 668: break;
1.32 mycroft 669: }
1.31 mycroft 670: } else {
671: if ((so->so_state & SS_ISCONNECTED) == 0) {
672: error = ENOTCONN;
1.32 mycroft 673: goto die;
1.31 mycroft 674: }
675: }
1.33 mycroft 676: error = udp_output(m, inp);
1.31 mycroft 677: if (nam) {
678: in_pcbdisconnect(inp);
1.35 mycroft 679: inp->inp_laddr = laddr; /* XXX */
680: in_pcbstate(inp, INP_BOUND); /* XXX */
1.31 mycroft 681: }
682: }
1.1 cgd 683: break;
684:
685: case PRU_SENSE:
686: /*
687: * stat: don't bother with a blocksize.
688: */
1.31 mycroft 689: splx(s);
1.1 cgd 690: return (0);
691:
1.31 mycroft 692: case PRU_RCVOOB:
693: error = EOPNOTSUPP;
694: break;
695:
1.1 cgd 696: case PRU_SENDOOB:
1.32 mycroft 697: m_freem(control);
1.31 mycroft 698: m_freem(m);
1.1 cgd 699: error = EOPNOTSUPP;
700: break;
701:
1.31 mycroft 702: case PRU_SOCKADDR:
703: in_setsockaddr(inp, nam);
704: break;
705:
706: case PRU_PEERADDR:
707: in_setpeeraddr(inp, nam);
708: break;
1.1 cgd 709:
710: default:
711: panic("udp_usrreq");
712: }
713:
714: release:
1.31 mycroft 715: splx(s);
1.1 cgd 716: return (error);
1.13 mycroft 717: }
718:
719: /*
720: * Sysctl for udp variables.
721: */
1.27 christos 722: int
1.13 mycroft 723: udp_sysctl(name, namelen, oldp, oldlenp, newp, newlen)
724: int *name;
725: u_int namelen;
726: void *oldp;
727: size_t *oldlenp;
728: void *newp;
729: size_t newlen;
730: {
731: /* All sysctl names at this level are terminal. */
732: if (namelen != 1)
733: return (ENOTDIR);
734:
735: switch (name[0]) {
736: case UDPCTL_CHECKSUM:
737: return (sysctl_int(oldp, oldlenp, newp, newlen, &udpcksum));
1.42 thorpej 738: case UDPCTL_SENDSPACE:
739: return (sysctl_int(oldp, oldlenp, newp, newlen,
740: &udp_sendspace));
741: case UDPCTL_RECVSPACE:
742: return (sysctl_int(oldp, oldlenp, newp, newlen,
743: &udp_recvspace));
1.13 mycroft 744: default:
745: return (ENOPROTOOPT);
746: }
747: /* NOTREACHED */
1.1 cgd 748: }
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