Annotation of src/sys/netinet/udp_usrreq.c, Revision 1.27
1.27 ! christos 1: /* $NetBSD: udp_usrreq.c,v 1.26 1996/01/31 03:49:38 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>
1.27 ! christos 46: #include <sys/systm.h>
! 47: #include <sys/proc.h>
! 48:
! 49: #include <vm/vm.h>
! 50: #include <sys/sysctl.h>
1.1 cgd 51:
1.5 mycroft 52: #include <net/if.h>
53: #include <net/route.h>
1.1 cgd 54:
1.5 mycroft 55: #include <netinet/in.h>
56: #include <netinet/in_systm.h>
1.15 cgd 57: #include <netinet/in_var.h>
1.5 mycroft 58: #include <netinet/ip.h>
59: #include <netinet/in_pcb.h>
60: #include <netinet/ip_var.h>
61: #include <netinet/ip_icmp.h>
62: #include <netinet/udp.h>
63: #include <netinet/udp_var.h>
1.1 cgd 64:
1.27 ! christos 65: #include <machine/stdarg.h>
! 66:
1.8 mycroft 67: /*
68: * UDP protocol implementation.
69: * Per RFC 768, August, 1980.
70: */
71: #ifndef COMPAT_42
72: int udpcksum = 1;
73: #else
74: int udpcksum = 0; /* XXX */
75: #endif
76:
77: struct sockaddr_in udp_in = { sizeof(udp_in), AF_INET };
1.1 cgd 78:
1.13 mycroft 79: static void udp_detach __P((struct inpcb *));
80: static void udp_notify __P((struct inpcb *, int));
81: static struct mbuf *udp_saveopt __P((caddr_t, int, int));
1.7 mycroft 82:
1.26 mycroft 83: #ifndef UDBHASHSIZE
84: #define UDBHASHSIZE 128
85: #endif
86: int udbhashsize = UDBHASHSIZE;
87:
1.7 mycroft 88: void
1.1 cgd 89: udp_init()
90: {
1.18 mycroft 91:
1.26 mycroft 92: in_pcbinit(&udbtable, udbhashsize);
1.1 cgd 93: }
94:
1.7 mycroft 95: void
1.27 ! christos 96: #if __STDC__
! 97: udp_input(struct mbuf *m, ...)
! 98: #else
! 99: udp_input(m, va_alist)
! 100: struct mbuf *m;
! 101: va_dcl
! 102: #endif
1.1 cgd 103: {
104: register struct ip *ip;
105: register struct udphdr *uh;
106: register struct inpcb *inp;
107: struct mbuf *opts = 0;
108: int len;
109: struct ip save_ip;
1.27 ! christos 110: int iphlen;
! 111: va_list ap;
! 112:
! 113: va_start(ap, m);
! 114: iphlen = va_arg(ap, int);
! 115: va_end(ap);
1.1 cgd 116:
117: udpstat.udps_ipackets++;
118:
119: /*
120: * Strip IP options, if any; should skip this,
121: * make available to user, and use on returned packets,
122: * but we don't yet have a way to check the checksum
123: * with options still present.
124: */
125: if (iphlen > sizeof (struct ip)) {
126: ip_stripoptions(m, (struct mbuf *)0);
127: iphlen = sizeof(struct ip);
128: }
129:
130: /*
131: * Get IP and UDP header together in first mbuf.
132: */
133: ip = mtod(m, struct ip *);
134: if (m->m_len < iphlen + sizeof(struct udphdr)) {
135: if ((m = m_pullup(m, iphlen + sizeof(struct udphdr))) == 0) {
136: udpstat.udps_hdrops++;
137: return;
138: }
139: ip = mtod(m, struct ip *);
140: }
141: uh = (struct udphdr *)((caddr_t)ip + iphlen);
142:
143: /*
144: * Make mbuf data length reflect UDP length.
145: * If not enough data to reflect UDP length, drop.
146: */
1.15 cgd 147: len = ntohs((u_int16_t)uh->uh_ulen);
1.1 cgd 148: if (ip->ip_len != len) {
149: if (len > ip->ip_len) {
150: udpstat.udps_badlen++;
151: goto bad;
152: }
153: m_adj(m, len - ip->ip_len);
154: /* ip->ip_len = len; */
155: }
156: /*
157: * Save a copy of the IP header in case we want restore it
158: * for sending an ICMP error message in response.
159: */
160: save_ip = *ip;
161:
162: /*
163: * Checksum extended UDP header and data.
164: */
165: if (udpcksum && uh->uh_sum) {
1.25 cgd 166: bzero(((struct ipovly *)ip)->ih_x1,
167: sizeof ((struct ipovly *)ip)->ih_x1);
1.1 cgd 168: ((struct ipovly *)ip)->ih_len = uh->uh_ulen;
1.27 ! christos 169: if ((uh->uh_sum = in_cksum(m, len + sizeof (struct ip))) != 0) {
1.1 cgd 170: udpstat.udps_badsum++;
171: m_freem(m);
172: return;
173: }
174: }
1.13 mycroft 175:
1.16 mycroft 176: if (IN_MULTICAST(ip->ip_dst.s_addr) ||
1.13 mycroft 177: in_broadcast(ip->ip_dst, m->m_pkthdr.rcvif)) {
1.4 hpeyerl 178: struct socket *last;
179: /*
180: * Deliver a multicast or broadcast datagram to *all* sockets
181: * for which the local and remote addresses and ports match
182: * those of the incoming datagram. This allows more than
183: * one process to receive multi/broadcasts on the same port.
184: * (This really ought to be done for unicast datagrams as
185: * well, but that would cause problems with existing
186: * applications that open both address-specific sockets and
187: * a wildcard socket listening to the same port -- they would
188: * end up receiving duplicates of every unicast datagram.
189: * Those applications open the multiple sockets to overcome an
190: * inadequacy of the UDP socket interface, but for backwards
191: * compatibility we avoid the problem here rather than
1.13 mycroft 192: * fixing the interface. Maybe 4.5BSD will remedy this?)
1.4 hpeyerl 193: */
1.13 mycroft 194:
1.4 hpeyerl 195: /*
196: * Construct sockaddr format source address.
197: */
198: udp_in.sin_port = uh->uh_sport;
199: udp_in.sin_addr = ip->ip_src;
200: m->m_len -= sizeof (struct udpiphdr);
201: m->m_data += sizeof (struct udpiphdr);
202: /*
203: * Locate pcb(s) for datagram.
204: * (Algorithm copied from raw_intr().)
205: */
206: last = NULL;
1.22 cgd 207: for (inp = udbtable.inpt_queue.cqh_first;
208: inp != (struct inpcb *)&udbtable.inpt_queue;
209: inp = inp->inp_queue.cqe_next) {
1.4 hpeyerl 210: if (inp->inp_lport != uh->uh_dport)
211: continue;
212: if (inp->inp_laddr.s_addr != INADDR_ANY) {
213: if (inp->inp_laddr.s_addr !=
214: ip->ip_dst.s_addr)
215: continue;
216: }
217: if (inp->inp_faddr.s_addr != INADDR_ANY) {
1.6 mycroft 218: if (inp->inp_faddr.s_addr !=
1.4 hpeyerl 219: ip->ip_src.s_addr ||
220: inp->inp_fport != uh->uh_sport)
221: continue;
222: }
223:
224: if (last != NULL) {
225: struct mbuf *n;
226:
227: if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
228: if (sbappendaddr(&last->so_rcv,
1.17 mycroft 229: sintosa(&udp_in), n,
230: (struct mbuf *)0) == 0) {
1.4 hpeyerl 231: m_freem(n);
1.13 mycroft 232: udpstat.udps_fullsock++;
233: } else
1.4 hpeyerl 234: sorwakeup(last);
235: }
236: }
237: last = inp->inp_socket;
238: /*
1.13 mycroft 239: * Don't look for additional matches if this one does
240: * not have either the SO_REUSEPORT or SO_REUSEADDR
241: * socket options set. This heuristic avoids searching
242: * through all pcbs in the common case of a non-shared
243: * port. It * assumes that an application will never
244: * clear these options after setting them.
1.4 hpeyerl 245: */
1.13 mycroft 246: if ((last->so_options&(SO_REUSEPORT|SO_REUSEADDR) == 0))
1.4 hpeyerl 247: break;
248: }
1.6 mycroft 249:
1.4 hpeyerl 250: if (last == NULL) {
251: /*
252: * No matching pcb found; discard datagram.
253: * (No need to send an ICMP Port Unreachable
254: * for a broadcast or multicast datgram.)
255: */
1.13 mycroft 256: udpstat.udps_noportbcast++;
1.4 hpeyerl 257: goto bad;
258: }
1.17 mycroft 259: if (sbappendaddr(&last->so_rcv, sintosa(&udp_in), m,
260: (struct mbuf *)0) == 0) {
1.13 mycroft 261: udpstat.udps_fullsock++;
1.4 hpeyerl 262: goto bad;
1.13 mycroft 263: }
1.4 hpeyerl 264: sorwakeup(last);
265: return;
266: }
1.1 cgd 267: /*
268: * Locate pcb for datagram.
269: */
1.26 mycroft 270: inp = in_pcbhashlookup(&udbtable, ip->ip_src, uh->uh_sport,
271: ip->ip_dst, uh->uh_dport);
272: if (inp == 0) {
273: ++udpstat.udps_pcbhashmiss;
1.18 mycroft 274: inp = in_pcblookup(&udbtable, ip->ip_src, uh->uh_sport,
1.1 cgd 275: ip->ip_dst, uh->uh_dport, INPLOOKUP_WILDCARD);
1.18 mycroft 276: if (inp == 0) {
277: udpstat.udps_noport++;
278: if (m->m_flags & (M_BCAST | M_MCAST)) {
279: udpstat.udps_noportbcast++;
280: goto bad;
281: }
282: *ip = save_ip;
283: ip->ip_len += iphlen;
284: icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0);
285: return;
1.13 mycroft 286: }
1.1 cgd 287: }
288:
289: /*
290: * Construct sockaddr format source address.
291: * Stuff source address and datagram in user buffer.
292: */
293: udp_in.sin_port = uh->uh_sport;
294: udp_in.sin_addr = ip->ip_src;
295: if (inp->inp_flags & INP_CONTROLOPTS) {
296: struct mbuf **mp = &opts;
297:
298: if (inp->inp_flags & INP_RECVDSTADDR) {
299: *mp = udp_saveopt((caddr_t) &ip->ip_dst,
300: sizeof(struct in_addr), IP_RECVDSTADDR);
301: if (*mp)
302: mp = &(*mp)->m_next;
303: }
304: #ifdef notyet
305: /* options were tossed above */
306: if (inp->inp_flags & INP_RECVOPTS) {
307: *mp = udp_saveopt((caddr_t) opts_deleted_above,
308: sizeof(struct in_addr), IP_RECVOPTS);
309: if (*mp)
310: mp = &(*mp)->m_next;
311: }
312: /* ip_srcroute doesn't do what we want here, need to fix */
313: if (inp->inp_flags & INP_RECVRETOPTS) {
314: *mp = udp_saveopt((caddr_t) ip_srcroute(),
315: sizeof(struct in_addr), IP_RECVRETOPTS);
316: if (*mp)
317: mp = &(*mp)->m_next;
318: }
319: #endif
320: }
321: iphlen += sizeof(struct udphdr);
322: m->m_len -= iphlen;
323: m->m_pkthdr.len -= iphlen;
324: m->m_data += iphlen;
1.17 mycroft 325: if (sbappendaddr(&inp->inp_socket->so_rcv, sintosa(&udp_in), m,
326: opts) == 0) {
1.1 cgd 327: udpstat.udps_fullsock++;
328: goto bad;
329: }
330: sorwakeup(inp->inp_socket);
331: return;
332: bad:
333: m_freem(m);
334: if (opts)
335: m_freem(opts);
336: }
337:
338: /*
339: * Create a "control" mbuf containing the specified data
340: * with the specified type for presentation with a datagram.
341: */
1.13 mycroft 342: struct mbuf *
1.1 cgd 343: udp_saveopt(p, size, type)
344: caddr_t p;
345: register int size;
346: int type;
347: {
348: register struct cmsghdr *cp;
349: struct mbuf *m;
350:
351: if ((m = m_get(M_DONTWAIT, MT_CONTROL)) == NULL)
352: return ((struct mbuf *) NULL);
353: cp = (struct cmsghdr *) mtod(m, struct cmsghdr *);
1.13 mycroft 354: bcopy(p, CMSG_DATA(cp), size);
1.1 cgd 355: size += sizeof(*cp);
356: m->m_len = size;
357: cp->cmsg_len = size;
358: cp->cmsg_level = IPPROTO_IP;
359: cp->cmsg_type = type;
360: return (m);
361: }
362:
363: /*
364: * Notify a udp user of an asynchronous error;
365: * just wake up so that he can collect error status.
366: */
1.7 mycroft 367: static void
1.1 cgd 368: udp_notify(inp, errno)
369: register struct inpcb *inp;
1.7 mycroft 370: int errno;
1.1 cgd 371: {
372: inp->inp_socket->so_error = errno;
373: sorwakeup(inp->inp_socket);
374: sowwakeup(inp->inp_socket);
375: }
376:
1.27 ! christos 377: void *
! 378: udp_ctlinput(cmd, sa, v)
1.1 cgd 379: int cmd;
380: struct sockaddr *sa;
1.27 ! christos 381: void *v;
1.1 cgd 382: {
1.27 ! christos 383: register struct ip *ip = v;
1.1 cgd 384: register struct udphdr *uh;
1.21 mycroft 385: extern int inetctlerrmap[];
1.18 mycroft 386: void (*notify) __P((struct inpcb *, int)) = udp_notify;
1.21 mycroft 387: int errno;
1.1 cgd 388:
1.20 mycroft 389: if ((unsigned)cmd >= PRC_NCMDS)
1.27 ! christos 390: return NULL;
1.20 mycroft 391: errno = inetctlerrmap[cmd];
1.18 mycroft 392: if (PRC_IS_REDIRECT(cmd))
1.19 mycroft 393: notify = in_rtchange, ip = 0;
1.18 mycroft 394: else if (cmd == PRC_HOSTDEAD)
1.19 mycroft 395: ip = 0;
1.23 cgd 396: else if (errno == 0)
1.27 ! christos 397: return NULL;
1.19 mycroft 398: if (ip) {
1.1 cgd 399: uh = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2));
1.18 mycroft 400: in_pcbnotify(&udbtable, sa, uh->uh_dport, ip->ip_src,
1.20 mycroft 401: uh->uh_sport, errno, notify);
1.19 mycroft 402: } else
1.20 mycroft 403: in_pcbnotifyall(&udbtable, sa, errno, notify);
1.27 ! christos 404: return NULL;
1.1 cgd 405: }
406:
1.7 mycroft 407: int
1.27 ! christos 408: #if __STDC__
! 409: udp_output(struct mbuf *m, ...)
! 410: #else
! 411: udp_output(m, va_alist)
! 412: struct mbuf *m;
! 413: va_dcl
! 414: #endif
! 415: {
1.1 cgd 416: register struct inpcb *inp;
417: struct mbuf *addr, *control;
418: register struct udpiphdr *ui;
419: register int len = m->m_pkthdr.len;
420: struct in_addr laddr;
1.27 ! christos 421: int s = 0, error = 0;
! 422: va_list ap;
! 423:
! 424: va_start(ap, m);
! 425: inp = va_arg(ap, struct inpcb *);
! 426: addr = va_arg(ap, struct mbuf *);
! 427: control = va_arg(ap, struct mbuf *);
! 428: va_end(ap);
1.1 cgd 429:
430: if (control)
431: m_freem(control); /* XXX */
432:
433: if (addr) {
434: laddr = inp->inp_laddr;
435: if (inp->inp_faddr.s_addr != INADDR_ANY) {
436: error = EISCONN;
437: goto release;
438: }
439: /*
440: * Must block input while temporarily connected.
441: */
1.24 mycroft 442: s = splsoftnet();
1.1 cgd 443: error = in_pcbconnect(inp, addr);
444: if (error) {
445: splx(s);
446: goto release;
447: }
448: } else {
449: if (inp->inp_faddr.s_addr == INADDR_ANY) {
450: error = ENOTCONN;
451: goto release;
452: }
453: }
454: /*
455: * Calculate data length and get a mbuf
456: * for UDP and IP headers.
457: */
1.13 mycroft 458: M_PREPEND(m, sizeof(struct udpiphdr), M_DONTWAIT);
459: if (m == 0) {
460: error = ENOBUFS;
461: goto release;
462: }
1.1 cgd 463:
464: /*
465: * Fill in mbuf with extended UDP header
466: * and addresses and length put into network format.
467: */
468: ui = mtod(m, struct udpiphdr *);
1.25 cgd 469: bzero(ui->ui_x1, sizeof ui->ui_x1);
1.1 cgd 470: ui->ui_pr = IPPROTO_UDP;
1.15 cgd 471: ui->ui_len = htons((u_int16_t)len + sizeof (struct udphdr));
1.1 cgd 472: ui->ui_src = inp->inp_laddr;
473: ui->ui_dst = inp->inp_faddr;
474: ui->ui_sport = inp->inp_lport;
475: ui->ui_dport = inp->inp_fport;
476: ui->ui_ulen = ui->ui_len;
477:
478: /*
479: * Stuff checksum and output datagram.
480: */
481: ui->ui_sum = 0;
482: if (udpcksum) {
483: if ((ui->ui_sum = in_cksum(m, sizeof (struct udpiphdr) + len)) == 0)
484: ui->ui_sum = 0xffff;
485: }
486: ((struct ip *)ui)->ip_len = sizeof (struct udpiphdr) + len;
487: ((struct ip *)ui)->ip_ttl = inp->inp_ip.ip_ttl; /* XXX */
488: ((struct ip *)ui)->ip_tos = inp->inp_ip.ip_tos; /* XXX */
489: udpstat.udps_opackets++;
490: error = ip_output(m, inp->inp_options, &inp->inp_route,
1.12 mycroft 491: inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST),
492: inp->inp_moptions);
1.1 cgd 493:
494: if (addr) {
495: in_pcbdisconnect(inp);
496: inp->inp_laddr = laddr;
497: splx(s);
498: }
499: return (error);
500:
501: release:
502: m_freem(m);
503: return (error);
504: }
505:
506: u_long udp_sendspace = 9216; /* really max datagram size */
507: u_long udp_recvspace = 40 * (1024 + sizeof(struct sockaddr_in));
508: /* 40 1K datagrams */
509:
510: /*ARGSUSED*/
1.7 mycroft 511: int
1.1 cgd 512: udp_usrreq(so, req, m, addr, control)
513: struct socket *so;
514: int req;
515: struct mbuf *m, *addr, *control;
516: {
517: struct inpcb *inp = sotoinpcb(so);
518: int error = 0;
519: int s;
520:
521: if (req == PRU_CONTROL)
1.15 cgd 522: return (in_control(so, (long)m, (caddr_t)addr,
1.1 cgd 523: (struct ifnet *)control));
524: if (inp == NULL && req != PRU_ATTACH) {
525: error = EINVAL;
526: goto release;
527: }
528: /*
529: * Note: need to block udp_input while changing
530: * the udp pcb queue and/or pcb addresses.
531: */
532: switch (req) {
533:
534: case PRU_ATTACH:
535: if (inp != NULL) {
536: error = EINVAL;
537: break;
538: }
1.24 mycroft 539: s = splsoftnet();
1.18 mycroft 540: error = in_pcballoc(so, &udbtable);
1.1 cgd 541: splx(s);
542: if (error)
543: break;
544: error = soreserve(so, udp_sendspace, udp_recvspace);
545: if (error)
546: break;
1.13 mycroft 547: ((struct inpcb *) so->so_pcb)->inp_ip.ip_ttl = ip_defttl;
1.1 cgd 548: break;
549:
550: case PRU_DETACH:
551: udp_detach(inp);
552: break;
553:
554: case PRU_BIND:
1.24 mycroft 555: s = splsoftnet();
1.1 cgd 556: error = in_pcbbind(inp, addr);
557: splx(s);
558: break;
559:
560: case PRU_LISTEN:
561: error = EOPNOTSUPP;
562: break;
563:
564: case PRU_CONNECT:
565: if (inp->inp_faddr.s_addr != INADDR_ANY) {
566: error = EISCONN;
567: break;
568: }
1.24 mycroft 569: s = splsoftnet();
1.1 cgd 570: error = in_pcbconnect(inp, addr);
571: splx(s);
572: if (error == 0)
573: soisconnected(so);
574: break;
575:
576: case PRU_CONNECT2:
577: error = EOPNOTSUPP;
578: break;
579:
580: case PRU_ACCEPT:
581: error = EOPNOTSUPP;
582: break;
583:
584: case PRU_DISCONNECT:
585: if (inp->inp_faddr.s_addr == INADDR_ANY) {
586: error = ENOTCONN;
587: break;
588: }
1.24 mycroft 589: s = splsoftnet();
1.1 cgd 590: in_pcbdisconnect(inp);
591: inp->inp_laddr.s_addr = INADDR_ANY;
592: splx(s);
593: so->so_state &= ~SS_ISCONNECTED; /* XXX */
594: break;
595:
596: case PRU_SHUTDOWN:
597: socantsendmore(so);
598: break;
599:
600: case PRU_SEND:
1.27 ! christos 601: return (udp_output(m, inp, addr, control));
1.1 cgd 602:
603: case PRU_ABORT:
604: soisdisconnected(so);
605: udp_detach(inp);
606: break;
607:
608: case PRU_SOCKADDR:
609: in_setsockaddr(inp, addr);
610: break;
611:
612: case PRU_PEERADDR:
613: in_setpeeraddr(inp, addr);
614: break;
615:
616: case PRU_SENSE:
617: /*
618: * stat: don't bother with a blocksize.
619: */
620: return (0);
621:
622: case PRU_SENDOOB:
623: case PRU_FASTTIMO:
624: case PRU_SLOWTIMO:
625: case PRU_PROTORCV:
626: case PRU_PROTOSEND:
627: error = EOPNOTSUPP;
628: break;
629:
630: case PRU_RCVD:
631: case PRU_RCVOOB:
632: return (EOPNOTSUPP); /* do not free mbuf's */
633:
634: default:
635: panic("udp_usrreq");
636: }
637:
638: release:
639: if (control) {
640: printf("udp control data unexpectedly retained\n");
641: m_freem(control);
642: }
643: if (m)
644: m_freem(m);
645: return (error);
646: }
647:
1.7 mycroft 648: static void
1.1 cgd 649: udp_detach(inp)
650: struct inpcb *inp;
651: {
1.24 mycroft 652: int s = splsoftnet();
1.1 cgd 653:
654: in_pcbdetach(inp);
655: splx(s);
1.13 mycroft 656: }
657:
658: /*
659: * Sysctl for udp variables.
660: */
1.27 ! christos 661: int
1.13 mycroft 662: udp_sysctl(name, namelen, oldp, oldlenp, newp, newlen)
663: int *name;
664: u_int namelen;
665: void *oldp;
666: size_t *oldlenp;
667: void *newp;
668: size_t newlen;
669: {
670: /* All sysctl names at this level are terminal. */
671: if (namelen != 1)
672: return (ENOTDIR);
673:
674: switch (name[0]) {
675: case UDPCTL_CHECKSUM:
676: return (sysctl_int(oldp, oldlenp, newp, newlen, &udpcksum));
677: default:
678: return (ENOPROTOOPT);
679: }
680: /* NOTREACHED */
1.1 cgd 681: }
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