1 /*
2 * Copyright (c) 1990,1994 Regents of The University of Michigan.
3 * All Rights Reserved. See COPYRIGHT.
4 *
5 * $FreeBSD: releng/5.0/sys/netatalk/ddp_usrreq.c 97658 2002-05-31 11:52:35Z tanimura $
6 */
7
8 #include <sys/param.h>
9 #include <sys/systm.h>
10 #include <sys/malloc.h>
11 #include <sys/mbuf.h>
12 #include <sys/socket.h>
13 #include <sys/socketvar.h>
14 #include <sys/protosw.h>
15 #include <net/if.h>
16 #include <net/route.h>
17 #include <net/intrq.h>
18
19 #include <netatalk/at.h>
20 #include <netatalk/at_var.h>
21 #include <netatalk/ddp_var.h>
22 #include <netatalk/at_extern.h>
23
24 static void at_pcbdisconnect( struct ddpcb *ddp );
25 static void at_sockaddr(struct ddpcb *ddp, struct sockaddr **addr);
26 static int at_pcbsetaddr(struct ddpcb *ddp, struct sockaddr *addr,
27 struct thread *td);
28 static int at_pcbconnect(struct ddpcb *ddp, struct sockaddr *addr,
29 struct thread *td);
30 static void at_pcbdetach(struct socket *so, struct ddpcb *ddp);
31 static int at_pcballoc(struct socket *so);
32
33 struct ddpcb *ddp_ports[ ATPORT_LAST ];
34 struct ddpcb *ddpcb = NULL;
35 static u_long ddp_sendspace = DDP_MAXSZ; /* Max ddp size + 1 (ddp_type) */
36 static u_long ddp_recvspace = 10 * ( 587 + sizeof( struct sockaddr_at ));
37
38
39 static int
40 ddp_attach(struct socket *so, int proto, struct thread *td)
41 {
42 struct ddpcb *ddp;
43 int error = 0;
44 int s;
45
46
47 ddp = sotoddpcb( so );
48 if ( ddp != NULL ) {
49 return( EINVAL);
50 }
51
52 s = splnet();
53 error = at_pcballoc( so );
54 splx(s);
55 if (error) {
56 return (error);
57 }
58 return (soreserve( so, ddp_sendspace, ddp_recvspace ));
59 }
60
61 static int
62 ddp_detach(struct socket *so)
63 {
64 struct ddpcb *ddp;
65 int s;
66
67 ddp = sotoddpcb( so );
68 if ( ddp == NULL ) {
69 return( EINVAL);
70 }
71 s = splnet();
72 at_pcbdetach( so, ddp );
73 splx(s);
74 return(0);
75 }
76
77 static int
78 ddp_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
79 {
80 struct ddpcb *ddp;
81 int error = 0;
82 int s;
83
84 ddp = sotoddpcb( so );
85 if ( ddp == NULL ) {
86 return( EINVAL);
87 }
88 s = splnet();
89 error = at_pcbsetaddr(ddp, nam, td);
90 splx(s);
91 return (error);
92 }
93
94 static int
95 ddp_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
96 {
97 struct ddpcb *ddp;
98 int error = 0;
99 int s;
100
101 ddp = sotoddpcb( so );
102 if ( ddp == NULL ) {
103 return( EINVAL);
104 }
105
106 if ( ddp->ddp_fsat.sat_port != ATADDR_ANYPORT ) {
107 return(EISCONN);
108 }
109
110 s = splnet();
111 error = at_pcbconnect( ddp, nam, td );
112 splx(s);
113 if ( error == 0 )
114 soisconnected( so );
115 return(error);
116 }
117
118 static int
119 ddp_disconnect(struct socket *so)
120 {
121
122 struct ddpcb *ddp;
123 int s;
124
125 ddp = sotoddpcb( so );
126 if ( ddp == NULL ) {
127 return( EINVAL);
128 }
129 if ( ddp->ddp_fsat.sat_addr.s_node == ATADDR_ANYNODE ) {
130 return(ENOTCONN);
131 }
132
133 s = splnet();
134 at_pcbdisconnect( ddp );
135 ddp->ddp_fsat.sat_addr.s_node = ATADDR_ANYNODE;
136 splx(s);
137 soisdisconnected( so );
138 return(0);
139 }
140
141 static int
142 ddp_shutdown(struct socket *so)
143 {
144 struct ddpcb *ddp;
145
146 ddp = sotoddpcb( so );
147 if ( ddp == NULL ) {
148 return( EINVAL);
149 }
150 socantsendmore( so );
151 return(0);
152 }
153
154 static int
155 ddp_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr,
156 struct mbuf *control, struct thread *td)
157 {
158 struct ddpcb *ddp;
159 int error = 0;
160 int s;
161
162 ddp = sotoddpcb( so );
163 if ( ddp == NULL ) {
164 return(EINVAL);
165 }
166
167 if ( control && control->m_len ) {
168 return(EINVAL);
169 }
170
171 if ( addr ) {
172 if ( ddp->ddp_fsat.sat_port != ATADDR_ANYPORT ) {
173 return(EISCONN);
174 }
175
176 s = splnet();
177 error = at_pcbconnect(ddp, addr, td);
178 splx( s );
179 if ( error ) {
180 return(error);
181 }
182 } else {
183 if ( ddp->ddp_fsat.sat_port == ATADDR_ANYPORT ) {
184 return(ENOTCONN);
185 }
186 }
187
188 s = splnet();
189 error = ddp_output( m, so );
190 if ( addr ) {
191 at_pcbdisconnect( ddp );
192 }
193 splx(s);
194 return(error);
195 }
196
197 static int
198 ddp_abort(struct socket *so)
199 {
200 struct ddpcb *ddp;
201 int s;
202
203 ddp = sotoddpcb( so );
204 if ( ddp == NULL ) {
205 return(EINVAL);
206 }
207 soisdisconnected( so );
208 s = splnet();
209 at_pcbdetach( so, ddp );
210 splx(s);
211 return(0);
212 }
213
214
215 static void
216 at_sockaddr(struct ddpcb *ddp, struct sockaddr **addr)
217 {
218 *addr = dup_sockaddr((struct sockaddr *)&ddp->ddp_lsat, 0);
219 }
220
221 static int
222 at_pcbsetaddr(struct ddpcb *ddp, struct sockaddr *addr, struct thread *td)
223 {
224 struct sockaddr_at lsat, *sat;
225 struct at_ifaddr *aa;
226 struct ddpcb *ddpp;
227
228 if ( ddp->ddp_lsat.sat_port != ATADDR_ANYPORT ) { /* shouldn't be bound */
229 return( EINVAL );
230 }
231
232 if (addr != 0) { /* validate passed address */
233 sat = (struct sockaddr_at *)addr;
234 if (sat->sat_family != AF_APPLETALK) {
235 return(EAFNOSUPPORT);
236 }
237
238 if ( sat->sat_addr.s_node != ATADDR_ANYNODE ||
239 sat->sat_addr.s_net != ATADDR_ANYNET ) {
240 for ( aa = at_ifaddr; aa; aa = aa->aa_next ) {
241 if (( sat->sat_addr.s_net == AA_SAT( aa )->sat_addr.s_net ) &&
242 ( sat->sat_addr.s_node == AA_SAT( aa )->sat_addr.s_node )) {
243 break;
244 }
245 }
246 if ( !aa ) {
247 return( EADDRNOTAVAIL );
248 }
249 }
250
251 if ( sat->sat_port != ATADDR_ANYPORT ) {
252 if ( sat->sat_port < ATPORT_FIRST ||
253 sat->sat_port >= ATPORT_LAST ) {
254 return( EINVAL );
255 }
256 if ( sat->sat_port < ATPORT_RESERVED &&
257 suser(td) ) {
258 return( EACCES );
259 }
260 }
261 } else {
262 bzero( (caddr_t)&lsat, sizeof( struct sockaddr_at ));
263 lsat.sat_len = sizeof(struct sockaddr_at);
264 lsat.sat_addr.s_node = ATADDR_ANYNODE;
265 lsat.sat_addr.s_net = ATADDR_ANYNET;
266 lsat.sat_family = AF_APPLETALK;
267 sat = &lsat;
268 }
269
270 if ( sat->sat_addr.s_node == ATADDR_ANYNODE &&
271 sat->sat_addr.s_net == ATADDR_ANYNET ) {
272 if ( at_ifaddr == NULL ) {
273 return( EADDRNOTAVAIL );
274 }
275 sat->sat_addr = AA_SAT( at_ifaddr )->sat_addr;
276 }
277 ddp->ddp_lsat = *sat;
278
279 /*
280 * Choose port.
281 */
282 if ( sat->sat_port == ATADDR_ANYPORT ) {
283 for ( sat->sat_port = ATPORT_RESERVED;
284 sat->sat_port < ATPORT_LAST; sat->sat_port++ ) {
285 if ( ddp_ports[ sat->sat_port - 1 ] == 0 ) {
286 break;
287 }
288 }
289 if ( sat->sat_port == ATPORT_LAST ) {
290 return( EADDRNOTAVAIL );
291 }
292 ddp->ddp_lsat.sat_port = sat->sat_port;
293 ddp_ports[ sat->sat_port - 1 ] = ddp;
294 } else {
295 for ( ddpp = ddp_ports[ sat->sat_port - 1 ]; ddpp;
296 ddpp = ddpp->ddp_pnext ) {
297 if ( ddpp->ddp_lsat.sat_addr.s_net == sat->sat_addr.s_net &&
298 ddpp->ddp_lsat.sat_addr.s_node == sat->sat_addr.s_node ) {
299 break;
300 }
301 }
302 if ( ddpp != NULL ) {
303 return( EADDRINUSE );
304 }
305 ddp->ddp_pnext = ddp_ports[ sat->sat_port - 1 ];
306 ddp_ports[ sat->sat_port - 1 ] = ddp;
307 if ( ddp->ddp_pnext ) {
308 ddp->ddp_pnext->ddp_pprev = ddp;
309 }
310 }
311
312 return( 0 );
313 }
314
315 static int
316 at_pcbconnect(struct ddpcb *ddp, struct sockaddr *addr, struct thread *td)
317 {
318 struct sockaddr_at *sat = (struct sockaddr_at *)addr;
319 struct route *ro;
320 struct at_ifaddr *aa = 0;
321 struct ifnet *ifp;
322 u_short hintnet = 0, net;
323
324 if (sat->sat_family != AF_APPLETALK) {
325 return(EAFNOSUPPORT);
326 }
327
328 /*
329 * Under phase 2, network 0 means "the network". We take "the
330 * network" to mean the network the control block is bound to.
331 * If the control block is not bound, there is an error.
332 */
333 if ( sat->sat_addr.s_net == ATADDR_ANYNET
334 && sat->sat_addr.s_node != ATADDR_ANYNODE ) {
335 if ( ddp->ddp_lsat.sat_port == ATADDR_ANYPORT ) {
336 return( EADDRNOTAVAIL );
337 }
338 hintnet = ddp->ddp_lsat.sat_addr.s_net;
339 }
340
341 ro = &ddp->ddp_route;
342 /*
343 * If we've got an old route for this pcb, check that it is valid.
344 * If we've changed our address, we may have an old "good looking"
345 * route here. Attempt to detect it.
346 */
347 if ( ro->ro_rt ) {
348 if ( hintnet ) {
349 net = hintnet;
350 } else {
351 net = sat->sat_addr.s_net;
352 }
353 aa = 0;
354 if ((ifp = ro->ro_rt->rt_ifp) != NULL) {
355 for ( aa = at_ifaddr; aa; aa = aa->aa_next ) {
356 if ( aa->aa_ifp == ifp &&
357 ntohs( net ) >= ntohs( aa->aa_firstnet ) &&
358 ntohs( net ) <= ntohs( aa->aa_lastnet )) {
359 break;
360 }
361 }
362 }
363 if ( aa == NULL || ( satosat( &ro->ro_dst )->sat_addr.s_net !=
364 ( hintnet ? hintnet : sat->sat_addr.s_net ) ||
365 satosat( &ro->ro_dst )->sat_addr.s_node !=
366 sat->sat_addr.s_node )) {
367 RTFREE( ro->ro_rt );
368 ro->ro_rt = (struct rtentry *)0;
369 }
370 }
371
372 /*
373 * If we've got no route for this interface, try to find one.
374 */
375 if ( ro->ro_rt == (struct rtentry *)0 ||
376 ro->ro_rt->rt_ifp == (struct ifnet *)0 ) {
377 ro->ro_dst.sa_len = sizeof( struct sockaddr_at );
378 ro->ro_dst.sa_family = AF_APPLETALK;
379 if ( hintnet ) {
380 satosat( &ro->ro_dst )->sat_addr.s_net = hintnet;
381 } else {
382 satosat( &ro->ro_dst )->sat_addr.s_net = sat->sat_addr.s_net;
383 }
384 satosat( &ro->ro_dst )->sat_addr.s_node = sat->sat_addr.s_node;
385 rtalloc( ro );
386 }
387
388 /*
389 * Make sure any route that we have has a valid interface.
390 */
391 aa = 0;
392 if ( ro->ro_rt && ( ifp = ro->ro_rt->rt_ifp )) {
393 for ( aa = at_ifaddr; aa; aa = aa->aa_next ) {
394 if ( aa->aa_ifp == ifp ) {
395 break;
396 }
397 }
398 }
399 if ( aa == 0 ) {
400 return( ENETUNREACH );
401 }
402
403 ddp->ddp_fsat = *sat;
404 if ( ddp->ddp_lsat.sat_port == ATADDR_ANYPORT ) {
405 return(at_pcbsetaddr(ddp, (struct sockaddr *)0, td));
406 }
407 return( 0 );
408 }
409
410 static void
411 at_pcbdisconnect( struct ddpcb *ddp )
412 {
413 ddp->ddp_fsat.sat_addr.s_net = ATADDR_ANYNET;
414 ddp->ddp_fsat.sat_addr.s_node = ATADDR_ANYNODE;
415 ddp->ddp_fsat.sat_port = ATADDR_ANYPORT;
416 }
417
418 static int
419 at_pcballoc( struct socket *so )
420 {
421 struct ddpcb *ddp;
422
423 MALLOC(ddp, struct ddpcb *, sizeof *ddp, M_PCB, M_WAITOK | M_ZERO);
424 ddp->ddp_lsat.sat_port = ATADDR_ANYPORT;
425
426 ddp->ddp_next = ddpcb;
427 ddp->ddp_prev = NULL;
428 ddp->ddp_pprev = NULL;
429 ddp->ddp_pnext = NULL;
430 if (ddpcb) {
431 ddpcb->ddp_prev = ddp;
432 }
433 ddpcb = ddp;
434
435 ddp->ddp_socket = so;
436 so->so_pcb = (caddr_t)ddp;
437 return(0);
438 }
439
440 static void
441 at_pcbdetach( struct socket *so, struct ddpcb *ddp)
442 {
443 soisdisconnected( so );
444 so->so_pcb = 0;
445 sotryfree(so);
446
447 /* remove ddp from ddp_ports list */
448 if ( ddp->ddp_lsat.sat_port != ATADDR_ANYPORT &&
449 ddp_ports[ ddp->ddp_lsat.sat_port - 1 ] != NULL ) {
450 if ( ddp->ddp_pprev != NULL ) {
451 ddp->ddp_pprev->ddp_pnext = ddp->ddp_pnext;
452 } else {
453 ddp_ports[ ddp->ddp_lsat.sat_port - 1 ] = ddp->ddp_pnext;
454 }
455 if ( ddp->ddp_pnext != NULL ) {
456 ddp->ddp_pnext->ddp_pprev = ddp->ddp_pprev;
457 }
458 }
459
460 if ( ddp->ddp_route.ro_rt ) {
461 rtfree( ddp->ddp_route.ro_rt );
462 }
463
464 if ( ddp->ddp_prev ) {
465 ddp->ddp_prev->ddp_next = ddp->ddp_next;
466 } else {
467 ddpcb = ddp->ddp_next;
468 }
469 if ( ddp->ddp_next ) {
470 ddp->ddp_next->ddp_prev = ddp->ddp_prev;
471 }
472 FREE(ddp, M_PCB);
473 }
474
475 /*
476 * For the moment, this just find the pcb with the correct local address.
477 * In the future, this will actually do some real searching, so we can use
478 * the sender's address to do de-multiplexing on a single port to many
479 * sockets (pcbs).
480 */
481 struct ddpcb *
482 ddp_search( struct sockaddr_at *from, struct sockaddr_at *to,
483 struct at_ifaddr *aa)
484 {
485 struct ddpcb *ddp;
486
487 /*
488 * Check for bad ports.
489 */
490 if ( to->sat_port < ATPORT_FIRST || to->sat_port >= ATPORT_LAST ) {
491 return( NULL );
492 }
493
494 /*
495 * Make sure the local address matches the sent address. What about
496 * the interface?
497 */
498 for ( ddp = ddp_ports[ to->sat_port - 1 ]; ddp; ddp = ddp->ddp_pnext ) {
499 /* XXX should we handle 0.YY? */
500
501 /* XXXX.YY to socket on destination interface */
502 if ( to->sat_addr.s_net == ddp->ddp_lsat.sat_addr.s_net &&
503 to->sat_addr.s_node == ddp->ddp_lsat.sat_addr.s_node ) {
504 break;
505 }
506
507 /* 0.255 to socket on receiving interface */
508 if ( to->sat_addr.s_node == ATADDR_BCAST && ( to->sat_addr.s_net == 0 ||
509 to->sat_addr.s_net == ddp->ddp_lsat.sat_addr.s_net ) &&
510 ddp->ddp_lsat.sat_addr.s_net == AA_SAT( aa )->sat_addr.s_net ) {
511 break;
512 }
513
514 /* XXXX.0 to socket on destination interface */
515 if ( to->sat_addr.s_net == aa->aa_firstnet &&
516 to->sat_addr.s_node == 0 &&
517 ntohs( ddp->ddp_lsat.sat_addr.s_net ) >=
518 ntohs( aa->aa_firstnet ) &&
519 ntohs( ddp->ddp_lsat.sat_addr.s_net ) <=
520 ntohs( aa->aa_lastnet )) {
521 break;
522 }
523 }
524 return( ddp );
525 }
526 static int
527 at_setpeeraddr(struct socket *so, struct sockaddr **nam)
528 {
529 return(EOPNOTSUPP);
530 }
531
532 static int
533 at_setsockaddr(struct socket *so, struct sockaddr **nam)
534 {
535 struct ddpcb *ddp;
536
537 ddp = sotoddpcb( so );
538 if ( ddp == NULL ) {
539 return( EINVAL);
540 }
541 at_sockaddr( ddp, nam );
542 return(0);
543 }
544
545
546 void
547 ddp_init(void )
548 {
549 atintrq1.ifq_maxlen = IFQ_MAXLEN;
550 atintrq2.ifq_maxlen = IFQ_MAXLEN;
551 atintrq1_present = 1;
552 atintrq2_present = 1;
553 mtx_init(&atintrq1.ifq_mtx, "at1_inq", NULL, MTX_DEF);
554 mtx_init(&atintrq2.ifq_mtx, "at2_inq", NULL, MTX_DEF);
555 }
556
557 #if 0
558 static void
559 ddp_clean(void )
560 {
561 struct ddpcb *ddp;
562
563 for ( ddp = ddpcb; ddp; ddp = ddp->ddp_next ) {
564 at_pcbdetach( ddp->ddp_socket, ddp );
565 }
566 }
567 #endif
568
569 struct pr_usrreqs ddp_usrreqs = {
570 ddp_abort,
571 pru_accept_notsupp,
572 ddp_attach,
573 ddp_bind,
574 ddp_connect,
575 pru_connect2_notsupp,
576 at_control,
577 ddp_detach,
578 ddp_disconnect,
579 pru_listen_notsupp,
580 at_setpeeraddr,
581 pru_rcvd_notsupp,
582 pru_rcvoob_notsupp,
583 ddp_send,
584 pru_sense_null,
585 ddp_shutdown,
586 at_setsockaddr,
587 sosend,
588 soreceive,
589 sopoll
590 };
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