Annotation of src/sys/netinet/udp_usrreq.c, Revision 1.36
1.36 ! mycroft 1: /* $NetBSD: udp_usrreq.c,v 1.35 1996/09/15 18:11:11 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:
1.13 mycroft 77: static void udp_notify __P((struct inpcb *, int));
78: static struct mbuf *udp_saveopt __P((caddr_t, int, 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);
1.1 cgd 146: if (ip->ip_len != len) {
147: if (len > ip->ip_len) {
148: udpstat.udps_badlen++;
149: goto bad;
150: }
151: m_adj(m, len - ip->ip_len);
152: /* ip->ip_len = len; */
153: }
154: /*
155: * Save a copy of the IP header in case we want restore it
156: * for sending an ICMP error message in response.
157: */
158: save_ip = *ip;
159:
160: /*
161: * Checksum extended UDP header and data.
162: */
1.29 mrg 163: if (uh->uh_sum) {
1.25 cgd 164: bzero(((struct ipovly *)ip)->ih_x1,
165: sizeof ((struct ipovly *)ip)->ih_x1);
1.1 cgd 166: ((struct ipovly *)ip)->ih_len = uh->uh_ulen;
1.27 christos 167: if ((uh->uh_sum = in_cksum(m, len + sizeof (struct ip))) != 0) {
1.1 cgd 168: udpstat.udps_badsum++;
169: m_freem(m);
170: return;
171: }
172: }
1.13 mycroft 173:
1.16 mycroft 174: if (IN_MULTICAST(ip->ip_dst.s_addr) ||
1.13 mycroft 175: in_broadcast(ip->ip_dst, m->m_pkthdr.rcvif)) {
1.4 hpeyerl 176: struct socket *last;
177: /*
178: * Deliver a multicast or broadcast datagram to *all* sockets
179: * for which the local and remote addresses and ports match
180: * those of the incoming datagram. This allows more than
181: * one process to receive multi/broadcasts on the same port.
182: * (This really ought to be done for unicast datagrams as
183: * well, but that would cause problems with existing
184: * applications that open both address-specific sockets and
185: * a wildcard socket listening to the same port -- they would
186: * end up receiving duplicates of every unicast datagram.
187: * Those applications open the multiple sockets to overcome an
188: * inadequacy of the UDP socket interface, but for backwards
189: * compatibility we avoid the problem here rather than
1.13 mycroft 190: * fixing the interface. Maybe 4.5BSD will remedy this?)
1.4 hpeyerl 191: */
1.13 mycroft 192:
1.4 hpeyerl 193: /*
194: * Construct sockaddr format source address.
195: */
1.34 mycroft 196: udpsrc.sin_family = AF_INET;
197: udpsrc.sin_len = sizeof(struct sockaddr_in);
1.36 ! mycroft 198: udpsrc.sin_addr = ip->ip_src;
1.34 mycroft 199: udpsrc.sin_port = uh->uh_sport;
1.36 ! mycroft 200: bzero((caddr_t)udpsrc.sin_zero, sizeof(udpsrc.sin_zero));
1.34 mycroft 201:
1.4 hpeyerl 202: m->m_len -= sizeof (struct udpiphdr);
203: m->m_data += sizeof (struct udpiphdr);
204: /*
205: * Locate pcb(s) for datagram.
206: * (Algorithm copied from raw_intr().)
207: */
208: last = NULL;
1.22 cgd 209: for (inp = udbtable.inpt_queue.cqh_first;
210: inp != (struct inpcb *)&udbtable.inpt_queue;
211: inp = inp->inp_queue.cqe_next) {
1.4 hpeyerl 212: if (inp->inp_lport != uh->uh_dport)
213: continue;
1.34 mycroft 214: if (!in_nullhost(inp->inp_laddr)) {
215: if (!in_hosteq(inp->inp_laddr, ip->ip_dst))
1.4 hpeyerl 216: continue;
217: }
1.34 mycroft 218: if (!in_nullhost(inp->inp_faddr)) {
219: if (!in_hosteq(inp->inp_faddr, ip->ip_src) ||
1.4 hpeyerl 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,
1.34 mycroft 229: sintosa(&udpsrc), n,
1.17 mycroft 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: */
1.28 christos 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: }
1.34 mycroft 259: if (sbappendaddr(&last->so_rcv, sintosa(&udpsrc), m,
1.17 mycroft 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: */
1.35 mycroft 270: inp = in_pcblookup_connect(&udbtable, ip->ip_src, uh->uh_sport,
1.26 mycroft 271: ip->ip_dst, uh->uh_dport);
272: if (inp == 0) {
273: ++udpstat.udps_pcbhashmiss;
1.35 mycroft 274: inp = in_pcblookup_bind(&udbtable, ip->ip_dst, uh->uh_dport);
1.18 mycroft 275: if (inp == 0) {
276: udpstat.udps_noport++;
277: if (m->m_flags & (M_BCAST | M_MCAST)) {
278: udpstat.udps_noportbcast++;
279: goto bad;
280: }
281: *ip = save_ip;
282: ip->ip_len += iphlen;
283: icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0);
284: return;
1.13 mycroft 285: }
1.1 cgd 286: }
287:
288: /*
289: * Construct sockaddr format source address.
290: * Stuff source address and datagram in user buffer.
291: */
1.34 mycroft 292: udpsrc.sin_family = AF_INET;
293: udpsrc.sin_len = sizeof(struct sockaddr_in);
1.36 ! mycroft 294: udpsrc.sin_addr = ip->ip_src;
1.34 mycroft 295: udpsrc.sin_port = uh->uh_sport;
1.36 ! mycroft 296: bzero((caddr_t)udpsrc.sin_zero, sizeof(udpsrc.sin_zero));
1.34 mycroft 297:
1.1 cgd 298: if (inp->inp_flags & INP_CONTROLOPTS) {
299: struct mbuf **mp = &opts;
300:
301: if (inp->inp_flags & INP_RECVDSTADDR) {
302: *mp = udp_saveopt((caddr_t) &ip->ip_dst,
303: sizeof(struct in_addr), IP_RECVDSTADDR);
304: if (*mp)
305: mp = &(*mp)->m_next;
306: }
307: #ifdef notyet
308: /* options were tossed above */
309: if (inp->inp_flags & INP_RECVOPTS) {
310: *mp = udp_saveopt((caddr_t) opts_deleted_above,
311: sizeof(struct in_addr), IP_RECVOPTS);
312: if (*mp)
313: mp = &(*mp)->m_next;
314: }
315: /* ip_srcroute doesn't do what we want here, need to fix */
316: if (inp->inp_flags & INP_RECVRETOPTS) {
317: *mp = udp_saveopt((caddr_t) ip_srcroute(),
318: sizeof(struct in_addr), IP_RECVRETOPTS);
319: if (*mp)
320: mp = &(*mp)->m_next;
321: }
322: #endif
323: }
324: iphlen += sizeof(struct udphdr);
325: m->m_len -= iphlen;
326: m->m_pkthdr.len -= iphlen;
327: m->m_data += iphlen;
1.34 mycroft 328: if (sbappendaddr(&inp->inp_socket->so_rcv, sintosa(&udpsrc), m,
1.17 mycroft 329: opts) == 0) {
1.1 cgd 330: udpstat.udps_fullsock++;
331: goto bad;
332: }
333: sorwakeup(inp->inp_socket);
334: return;
335: bad:
336: m_freem(m);
337: if (opts)
338: m_freem(opts);
339: }
340:
341: /*
342: * Create a "control" mbuf containing the specified data
343: * with the specified type for presentation with a datagram.
344: */
1.13 mycroft 345: struct mbuf *
1.1 cgd 346: udp_saveopt(p, size, type)
347: caddr_t p;
348: register int size;
349: int type;
350: {
351: register struct cmsghdr *cp;
352: struct mbuf *m;
353:
354: if ((m = m_get(M_DONTWAIT, MT_CONTROL)) == NULL)
355: return ((struct mbuf *) NULL);
356: cp = (struct cmsghdr *) mtod(m, struct cmsghdr *);
1.13 mycroft 357: bcopy(p, CMSG_DATA(cp), size);
1.1 cgd 358: size += sizeof(*cp);
359: m->m_len = size;
360: cp->cmsg_len = size;
361: cp->cmsg_level = IPPROTO_IP;
362: cp->cmsg_type = type;
363: return (m);
364: }
365:
366: /*
367: * Notify a udp user of an asynchronous error;
368: * just wake up so that he can collect error status.
369: */
1.7 mycroft 370: static void
1.1 cgd 371: udp_notify(inp, errno)
372: register struct inpcb *inp;
1.7 mycroft 373: int errno;
1.1 cgd 374: {
1.34 mycroft 375:
1.1 cgd 376: inp->inp_socket->so_error = errno;
377: sorwakeup(inp->inp_socket);
378: sowwakeup(inp->inp_socket);
379: }
380:
1.27 christos 381: void *
382: udp_ctlinput(cmd, sa, v)
1.1 cgd 383: int cmd;
384: struct sockaddr *sa;
1.27 christos 385: void *v;
1.1 cgd 386: {
1.27 christos 387: register struct ip *ip = v;
1.1 cgd 388: register struct udphdr *uh;
1.21 mycroft 389: extern int inetctlerrmap[];
1.18 mycroft 390: void (*notify) __P((struct inpcb *, int)) = udp_notify;
1.21 mycroft 391: int errno;
1.1 cgd 392:
1.20 mycroft 393: if ((unsigned)cmd >= PRC_NCMDS)
1.27 christos 394: return NULL;
1.20 mycroft 395: errno = inetctlerrmap[cmd];
1.18 mycroft 396: if (PRC_IS_REDIRECT(cmd))
1.19 mycroft 397: notify = in_rtchange, ip = 0;
1.18 mycroft 398: else if (cmd == PRC_HOSTDEAD)
1.19 mycroft 399: ip = 0;
1.23 cgd 400: else if (errno == 0)
1.27 christos 401: return NULL;
1.19 mycroft 402: if (ip) {
1.1 cgd 403: uh = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2));
1.34 mycroft 404: in_pcbnotify(&udbtable, satosin(sa)->sin_addr, uh->uh_dport,
405: ip->ip_src, uh->uh_sport, errno, notify);
1.19 mycroft 406: } else
1.34 mycroft 407: in_pcbnotifyall(&udbtable, satosin(sa)->sin_addr, errno,
408: notify);
1.27 christos 409: return NULL;
1.1 cgd 410: }
411:
1.7 mycroft 412: int
1.27 christos 413: #if __STDC__
414: udp_output(struct mbuf *m, ...)
415: #else
416: udp_output(m, va_alist)
417: struct mbuf *m;
418: va_dcl
419: #endif
420: {
1.1 cgd 421: register struct inpcb *inp;
422: register struct udpiphdr *ui;
423: register int len = m->m_pkthdr.len;
1.31 mycroft 424: int error = 0;
1.27 christos 425: va_list ap;
426:
427: va_start(ap, m);
428: inp = va_arg(ap, struct inpcb *);
429: va_end(ap);
1.1 cgd 430:
431: /*
432: * Calculate data length and get a mbuf
433: * for UDP and IP headers.
434: */
1.13 mycroft 435: M_PREPEND(m, sizeof(struct udpiphdr), M_DONTWAIT);
436: if (m == 0) {
437: error = ENOBUFS;
438: goto release;
439: }
1.1 cgd 440:
441: /*
442: * Fill in mbuf with extended UDP header
443: * and addresses and length put into network format.
444: */
445: ui = mtod(m, struct udpiphdr *);
1.25 cgd 446: bzero(ui->ui_x1, sizeof ui->ui_x1);
1.1 cgd 447: ui->ui_pr = IPPROTO_UDP;
1.15 cgd 448: ui->ui_len = htons((u_int16_t)len + sizeof (struct udphdr));
1.1 cgd 449: ui->ui_src = inp->inp_laddr;
450: ui->ui_dst = inp->inp_faddr;
451: ui->ui_sport = inp->inp_lport;
452: ui->ui_dport = inp->inp_fport;
453: ui->ui_ulen = ui->ui_len;
454:
455: /*
456: * Stuff checksum and output datagram.
457: */
458: ui->ui_sum = 0;
459: if (udpcksum) {
460: if ((ui->ui_sum = in_cksum(m, sizeof (struct udpiphdr) + len)) == 0)
461: ui->ui_sum = 0xffff;
462: }
463: ((struct ip *)ui)->ip_len = sizeof (struct udpiphdr) + len;
464: ((struct ip *)ui)->ip_ttl = inp->inp_ip.ip_ttl; /* XXX */
465: ((struct ip *)ui)->ip_tos = inp->inp_ip.ip_tos; /* XXX */
466: udpstat.udps_opackets++;
1.31 mycroft 467: return (ip_output(m, inp->inp_options, &inp->inp_route,
1.12 mycroft 468: inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST),
1.31 mycroft 469: inp->inp_moptions));
1.1 cgd 470:
471: release:
472: m_freem(m);
473: return (error);
474: }
475:
476: u_long udp_sendspace = 9216; /* really max datagram size */
477: u_long udp_recvspace = 40 * (1024 + sizeof(struct sockaddr_in));
478: /* 40 1K datagrams */
479:
480: /*ARGSUSED*/
1.7 mycroft 481: int
1.31 mycroft 482: udp_usrreq(so, req, m, nam, control, p)
1.1 cgd 483: struct socket *so;
484: int req;
1.31 mycroft 485: struct mbuf *m, *nam, *control;
1.30 mycroft 486: struct proc *p;
1.1 cgd 487: {
1.31 mycroft 488: register struct inpcb *inp;
1.1 cgd 489: int s;
1.31 mycroft 490: register int error = 0;
1.1 cgd 491:
492: if (req == PRU_CONTROL)
1.31 mycroft 493: return (in_control(so, (long)m, (caddr_t)nam,
1.30 mycroft 494: (struct ifnet *)control, p));
1.31 mycroft 495:
496: s = splsoftnet();
497: inp = sotoinpcb(so);
1.32 mycroft 498: #ifdef DIAGNOSTIC
499: if (req != PRU_SEND && req != PRU_SENDOOB && control)
500: panic("udp_usrreq: unexpected control mbuf");
501: #endif
1.31 mycroft 502: if (inp == 0 && req != PRU_ATTACH) {
503: error = EINVAL;
504: goto release;
505: }
506:
1.1 cgd 507: /*
508: * Note: need to block udp_input while changing
509: * the udp pcb queue and/or pcb addresses.
510: */
511: switch (req) {
512:
513: case PRU_ATTACH:
1.31 mycroft 514: if (inp != 0) {
515: error = EISCONN;
1.1 cgd 516: break;
517: }
1.31 mycroft 518: if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
519: error = soreserve(so, udp_sendspace, udp_recvspace);
520: if (error)
521: break;
522: }
1.18 mycroft 523: error = in_pcballoc(so, &udbtable);
1.1 cgd 524: if (error)
525: break;
1.31 mycroft 526: inp = sotoinpcb(so);
527: inp->inp_ip.ip_ttl = ip_defttl;
1.1 cgd 528: break;
529:
530: case PRU_DETACH:
1.31 mycroft 531: in_pcbdetach(inp);
1.1 cgd 532: break;
533:
534: case PRU_BIND:
1.31 mycroft 535: error = in_pcbbind(inp, nam, p);
1.1 cgd 536: break;
537:
538: case PRU_LISTEN:
539: error = EOPNOTSUPP;
540: break;
541:
542: case PRU_CONNECT:
1.31 mycroft 543: error = in_pcbconnect(inp, nam);
544: if (error)
1.1 cgd 545: break;
1.31 mycroft 546: soisconnected(so);
1.1 cgd 547: break;
548:
549: case PRU_CONNECT2:
550: error = EOPNOTSUPP;
551: break;
552:
553: case PRU_DISCONNECT:
1.31 mycroft 554: /*soisdisconnected(so);*/
555: so->so_state &= ~SS_ISCONNECTED; /* XXX */
1.1 cgd 556: in_pcbdisconnect(inp);
1.34 mycroft 557: inp->inp_laddr = zeroin_addr; /* XXX */
1.35 mycroft 558: in_pcbstate(inp, INP_BOUND); /* XXX */
1.1 cgd 559: break;
560:
561: case PRU_SHUTDOWN:
562: socantsendmore(so);
563: break;
564:
1.31 mycroft 565: case PRU_RCVD:
566: error = EOPNOTSUPP;
1.1 cgd 567: break;
568:
1.31 mycroft 569: case PRU_SEND:
1.32 mycroft 570: if (control && control->m_len) {
571: m_freem(control);
572: m_freem(m);
573: error = EINVAL;
574: break;
575: }
1.31 mycroft 576: {
1.35 mycroft 577: struct in_addr laddr; /* XXX */
1.1 cgd 578:
1.31 mycroft 579: if (nam) {
1.35 mycroft 580: laddr = inp->inp_laddr; /* XXX */
1.31 mycroft 581: if ((so->so_state & SS_ISCONNECTED) != 0) {
582: error = EISCONN;
1.32 mycroft 583: goto die;
1.31 mycroft 584: }
585: error = in_pcbconnect(inp, nam);
1.32 mycroft 586: if (error) {
587: die:
588: m_freem(m);
1.31 mycroft 589: break;
1.32 mycroft 590: }
1.31 mycroft 591: } else {
592: if ((so->so_state & SS_ISCONNECTED) == 0) {
593: error = ENOTCONN;
1.32 mycroft 594: goto die;
1.31 mycroft 595: }
596: }
1.33 mycroft 597: error = udp_output(m, inp);
1.31 mycroft 598: if (nam) {
599: in_pcbdisconnect(inp);
1.35 mycroft 600: inp->inp_laddr = laddr; /* XXX */
601: in_pcbstate(inp, INP_BOUND); /* XXX */
1.31 mycroft 602: }
603: }
1.1 cgd 604: break;
605:
606: case PRU_SENSE:
607: /*
608: * stat: don't bother with a blocksize.
609: */
1.31 mycroft 610: splx(s);
1.1 cgd 611: return (0);
612:
1.31 mycroft 613: case PRU_RCVOOB:
614: error = EOPNOTSUPP;
615: break;
616:
1.1 cgd 617: case PRU_SENDOOB:
1.32 mycroft 618: m_freem(control);
1.31 mycroft 619: m_freem(m);
1.1 cgd 620: error = EOPNOTSUPP;
621: break;
622:
1.31 mycroft 623: case PRU_SOCKADDR:
624: in_setsockaddr(inp, nam);
625: break;
626:
627: case PRU_PEERADDR:
628: in_setpeeraddr(inp, nam);
629: break;
1.1 cgd 630:
631: default:
632: panic("udp_usrreq");
633: }
634:
635: release:
1.31 mycroft 636: splx(s);
1.1 cgd 637: return (error);
1.13 mycroft 638: }
639:
640: /*
641: * Sysctl for udp variables.
642: */
1.27 christos 643: int
1.13 mycroft 644: udp_sysctl(name, namelen, oldp, oldlenp, newp, newlen)
645: int *name;
646: u_int namelen;
647: void *oldp;
648: size_t *oldlenp;
649: void *newp;
650: size_t newlen;
651: {
652: /* All sysctl names at this level are terminal. */
653: if (namelen != 1)
654: return (ENOTDIR);
655:
656: switch (name[0]) {
657: case UDPCTL_CHECKSUM:
658: return (sysctl_int(oldp, oldlenp, newp, newlen, &udpcksum));
659: default:
660: return (ENOPROTOOPT);
661: }
662: /* NOTREACHED */
1.1 cgd 663: }
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