![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to idp_usrreq.c CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [CSRG BSD Unix] / 43BSDTahoe / sys / netns|
Return to idp_usrreq.c CVS log | Up to [CSRG BSD Unix] / 43BSDTahoe / sys / netns |
1.1 root 1: /*
2: * Copyright (c) 1984, 1985, 1986, 1987 Regents of the University of California.
3: * All rights reserved.
4: *
5: * Redistribution and use in source and binary forms are permitted
6: * provided that the above copyright notice and this paragraph are
7: * duplicated in all such forms and that any documentation,
8: * advertising materials, and other materials related to such
9: * distribution and use acknowledge that the software was developed
10: * by the University of California, Berkeley. The name of the
11: * University may not be used to endorse or promote products derived
12: * from this software without specific prior written permission.
13: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
14: * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
15: * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
16: *
17: * @(#)idp_usrreq.c 7.4 (Berkeley) 6/29/88
18: */
19:
20: #include "param.h"
21: #include "dir.h"
22: #include "user.h"
23: #include "mbuf.h"
24: #include "protosw.h"
25: #include "socket.h"
26: #include "socketvar.h"
27: #include "errno.h"
28: #include "stat.h"
29:
30: #include "../net/if.h"
31: #include "../net/route.h"
32:
33: #include "ns.h"
34: #include "ns_pcb.h"
35: #include "ns_if.h"
36: #include "idp.h"
37: #include "idp_var.h"
38: #include "ns_error.h"
39:
40: /*
41: * IDP protocol implementation.
42: */
43:
44: struct sockaddr_ns idp_ns = { AF_NS };
45:
46: /*
47: * This may also be called for raw listeners.
48: */
49: idp_input(m, nsp, ifp)
50: struct mbuf *m;
51: register struct nspcb *nsp;
52: struct ifnet *ifp;
53: {
54: register struct idp *idp = mtod(m, struct idp *);
55:
56: if (nsp==0)
57: panic("No nspcb");
58: /*
59: * Construct sockaddr format source address.
60: * Stuff source address and datagram in user buffer.
61: */
62: idp_ns.sns_addr = idp->idp_sna;
63: if (ns_neteqnn(idp->idp_sna.x_net, ns_zeronet) && ifp) {
64: register struct ifaddr *ia;
65:
66: for (ia = ifp->if_addrlist; ia; ia = ia->ifa_next) {
67: if (ia->ifa_addr.sa_family == AF_NS) {
68: idp_ns.sns_addr.x_net =
69: IA_SNS(ia)->sns_addr.x_net;
70: break;
71: }
72: }
73: }
74: nsp->nsp_rpt = idp->idp_pt;
75: if ( ! (nsp->nsp_flags & NSP_RAWIN) ) {
76: m->m_len -= sizeof (struct idp);
77: m->m_off += sizeof (struct idp);
78: }
79: if (sbappendaddr(&nsp->nsp_socket->so_rcv, (struct sockaddr *)&idp_ns,
80: m, (struct mbuf *)0) == 0)
81: goto bad;
82: sorwakeup(nsp->nsp_socket);
83: return;
84: bad:
85: m_freem(m);
86: }
87:
88: idp_abort(nsp)
89: struct nspcb *nsp;
90: {
91: struct socket *so = nsp->nsp_socket;
92:
93: ns_pcbdisconnect(nsp);
94: soisdisconnected(so);
95: }
96: /*
97: * Drop connection, reporting
98: * the specified error.
99: */
100: struct nspcb *
101: idp_drop(nsp, errno)
102: register struct nspcb *nsp;
103: int errno;
104: {
105: struct socket *so = nsp->nsp_socket;
106:
107: /*
108: * someday, in the xerox world
109: * we will generate error protocol packets
110: * announcing that the socket has gone away.
111: */
112: /*if (TCPS_HAVERCVDSYN(tp->t_state)) {
113: tp->t_state = TCPS_CLOSED;
114: (void) tcp_output(tp);
115: }*/
116: so->so_error = errno;
117: ns_pcbdisconnect(nsp);
118: soisdisconnected(so);
119: }
120:
121: int noIdpRoute;
122: idp_output(nsp, m0)
123: struct nspcb *nsp;
124: struct mbuf *m0;
125: {
126: register struct mbuf *m;
127: register struct idp *idp;
128: register struct socket *so;
129: register int len = 0;
130: register struct route *ro;
131: struct mbuf *mprev;
132: extern int idpcksum;
133:
134: /*
135: * Calculate data length.
136: */
137: for (m = m0; m; m = m->m_next) {
138: mprev = m;
139: len += m->m_len;
140: }
141: /*
142: * Make sure packet is actually of even length.
143: */
144:
145: if (len & 1) {
146: m = mprev;
147: if (m->m_len + m->m_off < MMAXOFF) {
148: m->m_len++;
149: } else {
150: struct mbuf *m1 = m_get(M_DONTWAIT, MT_DATA);
151:
152: if (m1 == 0) {
153: m_freem(m0);
154: return (ENOBUFS);
155: }
156: m1->m_len = 1;
157: m1->m_off = MMAXOFF - 1;
158: * mtod(m1, char *) = 0;
159: m->m_next = m1;
160: }
161: }
162:
163: /*
164: * Fill in mbuf with extended IDP header
165: * and addresses and length put into network format.
166: */
167: if (nsp->nsp_flags & NSP_RAWOUT) {
168: m = m0;
169: idp = mtod(m, struct idp *);
170: } else {
171: m = m_get(M_DONTWAIT, MT_HEADER);
172: if (m == 0) {
173: m_freem(m0);
174: return (ENOBUFS);
175: }
176: m->m_off = MMAXOFF - sizeof (struct idp) - 2;
177: /* adjust to start on longword bdry
178: for NSIP on gould */
179: m->m_len = sizeof (struct idp);
180: m->m_next = m0;
181: idp = mtod(m, struct idp *);
182: idp->idp_tc = 0;
183: idp->idp_pt = nsp->nsp_dpt;
184: idp->idp_sna = nsp->nsp_laddr;
185: idp->idp_dna = nsp->nsp_faddr;
186: len += sizeof (struct idp);
187: }
188:
189: idp->idp_len = htons((u_short)len);
190:
191: if (idpcksum) {
192: idp->idp_sum = 0;
193: len = ((len - 1) | 1) + 1;
194: idp->idp_sum = ns_cksum(m, len);
195: } else
196: idp->idp_sum = 0xffff;
197:
198: /*
199: * Output datagram.
200: */
201: so = nsp->nsp_socket;
202: if (so->so_options & SO_DONTROUTE)
203: return (ns_output(m, (struct route *)0,
204: (so->so_options & SO_BROADCAST) | NS_ROUTETOIF));
205: /*
206: * Use cached route for previous datagram if
207: * possible. If the previous net was the same
208: * and the interface was a broadcast medium, or
209: * if the previous destination was identical,
210: * then we are ok.
211: *
212: * NB: We don't handle broadcasts because that
213: * would require 3 subroutine calls.
214: */
215: ro = &nsp->nsp_route;
216: #ifdef ancient_history
217: /*
218: * I think that this will all be handled in ns_pcbconnect!
219: */
220: if (ro->ro_rt) {
221: if(ns_neteq(nsp->nsp_lastdst, idp->idp_dna)) {
222: /*
223: * This assumes we have no GH type routes
224: */
225: if (ro->ro_rt->rt_flags & RTF_HOST) {
226: if (!ns_hosteq(nsp->nsp_lastdst, idp->idp_dna))
227: goto re_route;
228:
229: }
230: if ((ro->ro_rt->rt_flags & RTF_GATEWAY) == 0) {
231: register struct ns_addr *dst =
232: &satons_addr(ro->ro_dst);
233: dst->x_host = idp->idp_dna.x_host;
234: }
235: /*
236: * Otherwise, we go through the same gateway
237: * and dst is already set up.
238: */
239: } else {
240: re_route:
241: RTFREE(ro->ro_rt);
242: ro->ro_rt = (struct rtentry *)0;
243: }
244: }
245: nsp->nsp_lastdst = idp->idp_dna;
246: #endif ancient_history
247: if (noIdpRoute) ro = 0;
248: return (ns_output(m, ro, so->so_options & SO_BROADCAST));
249: }
250: /* ARGSUSED */
251: idp_ctloutput(req, so, level, name, value)
252: int req, level;
253: struct socket *so;
254: int name;
255: struct mbuf **value;
256: {
257: register struct mbuf *m;
258: struct nspcb *nsp = sotonspcb(so);
259: int mask, error = 0;
260: extern long ns_pexseq;
261:
262: if (nsp == NULL)
263: return (EINVAL);
264:
265: switch (req) {
266:
267: case PRCO_GETOPT:
268: if (value==NULL)
269: return (EINVAL);
270: m = m_get(M_DONTWAIT, MT_DATA);
271: if (m==NULL)
272: return (ENOBUFS);
273: switch (name) {
274:
275: case SO_ALL_PACKETS:
276: mask = NSP_ALL_PACKETS;
277: goto get_flags;
278:
279: case SO_HEADERS_ON_INPUT:
280: mask = NSP_RAWIN;
281: goto get_flags;
282:
283: case SO_HEADERS_ON_OUTPUT:
284: mask = NSP_RAWOUT;
285: get_flags:
286: m->m_len = sizeof(short);
287: m->m_off = MMAXOFF - sizeof(short);
288: *mtod(m, short *) = nsp->nsp_flags & mask;
289: break;
290:
291: case SO_DEFAULT_HEADERS:
292: m->m_len = sizeof(struct idp);
293: m->m_off = MMAXOFF - sizeof(struct idp);
294: {
295: register struct idp *idp = mtod(m, struct idp *);
296: idp->idp_len = 0;
297: idp->idp_sum = 0;
298: idp->idp_tc = 0;
299: idp->idp_pt = nsp->nsp_dpt;
300: idp->idp_dna = nsp->nsp_faddr;
301: idp->idp_sna = nsp->nsp_laddr;
302: }
303: break;
304:
305: case SO_SEQNO:
306: m->m_len = sizeof(long);
307: m->m_off = MMAXOFF - sizeof(long);
308: *mtod(m, long *) = ns_pexseq++;
309: break;
310:
311: default:
312: error = EINVAL;
313: }
314: *value = m;
315: break;
316:
317: case PRCO_SETOPT:
318: switch (name) {
319: int *ok;
320:
321: case SO_ALL_PACKETS:
322: mask = NSP_ALL_PACKETS;
323: goto set_head;
324:
325: case SO_HEADERS_ON_INPUT:
326: mask = NSP_RAWIN;
327: goto set_head;
328:
329: case SO_HEADERS_ON_OUTPUT:
330: mask = NSP_RAWOUT;
331: set_head:
332: if (value && *value) {
333: ok = mtod(*value, int *);
334: if (*ok)
335: nsp->nsp_flags |= mask;
336: else
337: nsp->nsp_flags &= ~mask;
338: } else error = EINVAL;
339: break;
340:
341: case SO_DEFAULT_HEADERS:
342: {
343: register struct idp *idp
344: = mtod(*value, struct idp *);
345: nsp->nsp_dpt = idp->idp_pt;
346: }
347: break;
348: #ifdef NSIP
349:
350: case SO_NSIP_ROUTE:
351: error = nsip_route(*value);
352: break;
353: #endif NSIP
354: default:
355: error = EINVAL;
356: }
357: if (value && *value)
358: m_freem(*value);
359: break;
360: }
361: return (error);
362: }
363:
364: /*ARGSUSED*/
365: idp_usrreq(so, req, m, nam, rights)
366: struct socket *so;
367: int req;
368: struct mbuf *m, *nam, *rights;
369: {
370: struct nspcb *nsp = sotonspcb(so);
371: int error = 0;
372:
373: if (req == PRU_CONTROL)
374: return (ns_control(so, (int)m, (caddr_t)nam,
375: (struct ifnet *)rights));
376: if (rights && rights->m_len) {
377: error = EINVAL;
378: goto release;
379: }
380: if (nsp == NULL && req != PRU_ATTACH) {
381: error = EINVAL;
382: goto release;
383: }
384: switch (req) {
385:
386: case PRU_ATTACH:
387: if (nsp != NULL) {
388: error = EINVAL;
389: break;
390: }
391: error = ns_pcballoc(so, &nspcb);
392: if (error)
393: break;
394: error = soreserve(so, (u_long) 2048, (u_long) 2048);
395: if (error)
396: break;
397: break;
398:
399: case PRU_DETACH:
400: if (nsp == NULL) {
401: error = ENOTCONN;
402: break;
403: }
404: ns_pcbdetach(nsp);
405: break;
406:
407: case PRU_BIND:
408: error = ns_pcbbind(nsp, nam);
409: break;
410:
411: case PRU_LISTEN:
412: error = EOPNOTSUPP;
413: break;
414:
415: case PRU_CONNECT:
416: if (!ns_nullhost(nsp->nsp_faddr)) {
417: error = EISCONN;
418: break;
419: }
420: error = ns_pcbconnect(nsp, nam);
421: if (error == 0)
422: soisconnected(so);
423: break;
424:
425: case PRU_CONNECT2:
426: error = EOPNOTSUPP;
427: break;
428:
429: case PRU_ACCEPT:
430: error = EOPNOTSUPP;
431: break;
432:
433: case PRU_DISCONNECT:
434: if (ns_nullhost(nsp->nsp_faddr)) {
435: error = ENOTCONN;
436: break;
437: }
438: ns_pcbdisconnect(nsp);
439: soisdisconnected(so);
440: break;
441:
442: case PRU_SHUTDOWN:
443: socantsendmore(so);
444: break;
445:
446: case PRU_SEND:
447: {
448: struct ns_addr laddr;
449: int s;
450:
451: if (nam) {
452: laddr = nsp->nsp_laddr;
453: if (!ns_nullhost(nsp->nsp_faddr)) {
454: error = EISCONN;
455: break;
456: }
457: /*
458: * Must block input while temporarily connected.
459: */
460: s = splnet();
461: error = ns_pcbconnect(nsp, nam);
462: if (error) {
463: splx(s);
464: break;
465: }
466: } else {
467: if (ns_nullhost(nsp->nsp_faddr)) {
468: error = ENOTCONN;
469: break;
470: }
471: }
472: error = idp_output(nsp, m);
473: m = NULL;
474: if (nam) {
475: ns_pcbdisconnect(nsp);
476: splx(s);
477: nsp->nsp_laddr.x_host = laddr.x_host;
478: nsp->nsp_laddr.x_port = laddr.x_port;
479: }
480: }
481: break;
482:
483: case PRU_ABORT:
484: ns_pcbdetach(nsp);
485: sofree(so);
486: soisdisconnected(so);
487: break;
488:
489: case PRU_SOCKADDR:
490: ns_setsockaddr(nsp, nam);
491: break;
492:
493: case PRU_PEERADDR:
494: ns_setpeeraddr(nsp, nam);
495: break;
496:
497: case PRU_SENSE:
498: /*
499: * stat: don't bother with a blocksize.
500: */
501: return (0);
502:
503: case PRU_SENDOOB:
504: case PRU_FASTTIMO:
505: case PRU_SLOWTIMO:
506: case PRU_PROTORCV:
507: case PRU_PROTOSEND:
508: error = EOPNOTSUPP;
509: break;
510:
511: case PRU_CONTROL:
512: case PRU_RCVD:
513: case PRU_RCVOOB:
514: return (EOPNOTSUPP); /* do not free mbuf's */
515:
516: default:
517: panic("idp_usrreq");
518: }
519: release:
520: if (m != NULL)
521: m_freem(m);
522: return (error);
523: }
524: /*ARGSUSED*/
525: idp_raw_usrreq(so, req, m, nam, rights)
526: struct socket *so;
527: int req;
528: struct mbuf *m, *nam, *rights;
529: {
530: int error = 0;
531: struct nspcb *nsp = sotonspcb(so);
532: extern struct nspcb nsrawpcb;
533:
534: switch (req) {
535:
536: case PRU_ATTACH:
537:
538: if (!suser() || (nsp != NULL)) {
539: error = EINVAL;
540: break;
541: }
542: error = ns_pcballoc(so, &nsrawpcb);
543: if (error)
544: break;
545: error = soreserve(so, (u_long) 2048, (u_long) 2048);
546: if (error)
547: break;
548: nsp = sotonspcb(so);
549: nsp->nsp_faddr.x_host = ns_broadhost;
550: nsp->nsp_flags = NSP_RAWIN | NSP_RAWOUT;
551: break;
552: default:
553: error = idp_usrreq(so, req, m, nam, rights);
554: }
555: return (error);
556: }
557:
This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.