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: }
CVSweb <webmaster@jp.NetBSD.org>
![[BACK]](/icons/back.gif){kind=icon}
Return to udp_usrreq.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [cvs.NetBSD.org] / src / sys / netinet