1 /* $NetBSD: ddp_usrreq.c,v 1.13 2005/02/26 22:45:09 perry Exp $ */
2
3 /*
4 * Copyright (c) 1990,1991 Regents of The University of Michigan.
5 * All Rights Reserved.
6 *
7 * Permission to use, copy, modify, and distribute this software and
8 * its documentation for any purpose and without fee is hereby granted,
9 * provided that the above copyright notice appears in all copies and
10 * that both that copyright notice and this permission notice appear
11 * in supporting documentation, and that the name of The University
12 * of Michigan not be used in advertising or publicity pertaining to
13 * distribution of the software without specific, written prior
14 * permission. This software is supplied as is without expressed or
15 * implied warranties of any kind.
16 *
17 * This product includes software developed by the University of
18 * California, Berkeley and its contributors.
19 *
20 * Research Systems Unix Group
21 * The University of Michigan
22 * c/o Wesley Craig
23 * 535 W. William Street
24 * Ann Arbor, Michigan
25 * +1-313-764-2278
26 * netatalk@umich.edu
27 */
28
29 #include <sys/cdefs.h>
30 __KERNEL_RCSID(0, "$NetBSD: ddp_usrreq.c,v 1.13 2005/02/26 22:45:09 perry Exp $");
31
32 #include "opt_mbuftrace.h"
33
34 #include <sys/param.h>
35 #include <sys/errno.h>
36 #include <sys/systm.h>
37 #include <sys/proc.h>
38 #include <sys/mbuf.h>
39 #include <sys/ioctl.h>
40 #include <sys/socket.h>
41 #include <sys/socketvar.h>
42 #include <sys/protosw.h>
43 #include <net/if.h>
44 #include <net/route.h>
45 #include <net/if_ether.h>
46 #include <netinet/in.h>
47
48 #include <netatalk/at.h>
49 #include <netatalk/at_var.h>
50 #include <netatalk/ddp_var.h>
51 #include <netatalk/aarp.h>
52 #include <netatalk/at_extern.h>
53
54 static void at_pcbdisconnect __P((struct ddpcb *));
55 static void at_sockaddr __P((struct ddpcb *, struct mbuf *));
56 static int at_pcbsetaddr __P((struct ddpcb *, struct mbuf *, struct proc *));
57 static int at_pcbconnect __P((struct ddpcb *, struct mbuf *, struct proc *));
58 static void at_pcbdetach __P((struct socket *, struct ddpcb *));
59 static int at_pcballoc __P((struct socket *));
60
61 struct ifqueue atintrq1, atintrq2;
62 struct ddpcb *ddp_ports[ATPORT_LAST];
63 struct ddpcb *ddpcb = NULL;
64 struct ddpstat ddpstat;
65 struct at_ifaddrhead at_ifaddr; /* Here as inited in this file */
66 u_long ddp_sendspace = DDP_MAXSZ; /* Max ddp size + 1 (ddp_type) */
67 u_long ddp_recvspace = 25 * (587 + sizeof(struct sockaddr_at));
68
69 #ifdef MBUFTRACE
70 struct mowner atalk_rx_mowner = { "atalk", "rx" };
71 struct mowner atalk_tx_mowner = { "atalk", "tx" };
72 #endif
73
74 /* ARGSUSED */
75 int
76 ddp_usrreq(so, req, m, addr, rights, p)
77 struct socket *so;
78 int req;
79 struct mbuf *m;
80 struct mbuf *addr;
81 struct mbuf *rights;
82 struct proc *p;
83 {
84 struct ddpcb *ddp;
85 int error = 0;
86
87 ddp = sotoddpcb(so);
88
89 if (req == PRU_CONTROL) {
90 return (at_control((long) m, (caddr_t) addr,
91 (struct ifnet *) rights, (struct proc *) p));
92 }
93 if (req == PRU_PURGEIF) {
94 at_purgeif((struct ifnet *) rights);
95 return (0);
96 }
97 if (rights && rights->m_len) {
98 error = EINVAL;
99 goto release;
100 }
101 if (ddp == NULL && req != PRU_ATTACH) {
102 error = EINVAL;
103 goto release;
104 }
105 switch (req) {
106 case PRU_ATTACH:
107 if (ddp != NULL) {
108 error = EINVAL;
109 break;
110 }
111 if ((error = at_pcballoc(so)) != 0) {
112 break;
113 }
114 error = soreserve(so, ddp_sendspace, ddp_recvspace);
115 break;
116
117 case PRU_DETACH:
118 at_pcbdetach(so, ddp);
119 break;
120
121 case PRU_BIND:
122 error = at_pcbsetaddr(ddp, addr, p);
123 break;
124
125 case PRU_SOCKADDR:
126 at_sockaddr(ddp, addr);
127 break;
128
129 case PRU_CONNECT:
130 if (ddp->ddp_fsat.sat_port != ATADDR_ANYPORT) {
131 error = EISCONN;
132 break;
133 }
134 error = at_pcbconnect(ddp, addr, p);
135 if (error == 0)
136 soisconnected(so);
137 break;
138
139 case PRU_DISCONNECT:
140 if (ddp->ddp_fsat.sat_addr.s_node == ATADDR_ANYNODE) {
141 error = ENOTCONN;
142 break;
143 }
144 at_pcbdisconnect(ddp);
145 soisdisconnected(so);
146 break;
147
148 case PRU_SHUTDOWN:
149 socantsendmore(so);
150 break;
151
152 case PRU_SEND:{
153 int s = 0;
154
155 if (addr) {
156 if (ddp->ddp_fsat.sat_port != ATADDR_ANYPORT) {
157 error = EISCONN;
158 break;
159 }
160 s = splnet();
161 error = at_pcbconnect(ddp, addr, p);
162 if (error) {
163 splx(s);
164 break;
165 }
166 } else {
167 if (ddp->ddp_fsat.sat_port == ATADDR_ANYPORT) {
168 error = ENOTCONN;
169 break;
170 }
171 }
172
173 error = ddp_output(m, ddp);
174 m = NULL;
175 if (addr) {
176 at_pcbdisconnect(ddp);
177 splx(s);
178 }
179 }
180 break;
181
182 case PRU_ABORT:
183 soisdisconnected(so);
184 at_pcbdetach(so, ddp);
185 break;
186
187 case PRU_LISTEN:
188 case PRU_CONNECT2:
189 case PRU_ACCEPT:
190 case PRU_SENDOOB:
191 case PRU_FASTTIMO:
192 case PRU_SLOWTIMO:
193 case PRU_PROTORCV:
194 case PRU_PROTOSEND:
195 error = EOPNOTSUPP;
196 break;
197
198 case PRU_RCVD:
199 case PRU_RCVOOB:
200 /*
201 * Don't mfree. Good architecture...
202 */
203 return (EOPNOTSUPP);
204
205 case PRU_SENSE:
206 /*
207 * 1. Don't return block size.
208 * 2. Don't mfree.
209 */
210 return (0);
211
212 default:
213 error = EOPNOTSUPP;
214 }
215
216 release:
217 if (m != NULL) {
218 m_freem(m);
219 }
220 return (error);
221 }
222
223 static void
224 at_sockaddr(ddp, addr)
225 struct ddpcb *ddp;
226 struct mbuf *addr;
227 {
228 struct sockaddr_at *sat;
229
230 addr->m_len = sizeof(struct sockaddr_at);
231 sat = mtod(addr, struct sockaddr_at *);
232 *sat = ddp->ddp_lsat;
233 }
234
235 static int
236 at_pcbsetaddr(ddp, addr, p)
237 struct ddpcb *ddp;
238 struct mbuf *addr;
239 struct proc *p;
240 {
241 struct sockaddr_at lsat, *sat;
242 struct at_ifaddr *aa;
243 struct ddpcb *ddpp;
244
245 if (ddp->ddp_lsat.sat_port != ATADDR_ANYPORT) { /* shouldn't be bound */
246 return (EINVAL);
247 }
248 if (addr != 0) { /* validate passed address */
249 sat = mtod(addr, struct sockaddr_at *);
250 if (addr->m_len != sizeof(*sat))
251 return (EINVAL);
252
253 if (sat->sat_family != AF_APPLETALK)
254 return (EAFNOSUPPORT);
255
256 if (sat->sat_addr.s_node != ATADDR_ANYNODE ||
257 sat->sat_addr.s_net != ATADDR_ANYNET) {
258 for (aa = at_ifaddr.tqh_first; aa;
259 aa = aa->aa_list.tqe_next) {
260 if ((sat->sat_addr.s_net ==
261 AA_SAT(aa)->sat_addr.s_net) &&
262 (sat->sat_addr.s_node ==
263 AA_SAT(aa)->sat_addr.s_node))
264 break;
265 }
266 if (!aa)
267 return (EADDRNOTAVAIL);
268 }
269 if (sat->sat_port != ATADDR_ANYPORT) {
270 if (sat->sat_port < ATPORT_FIRST ||
271 sat->sat_port >= ATPORT_LAST)
272 return (EINVAL);
273
274 if (sat->sat_port < ATPORT_RESERVED &&
275 suser(p->p_ucred, &p->p_acflag))
276 return (EACCES);
277 }
278 } else {
279 bzero((caddr_t) & lsat, sizeof(struct sockaddr_at));
280 lsat.sat_len = sizeof(struct sockaddr_at);
281 lsat.sat_addr.s_node = ATADDR_ANYNODE;
282 lsat.sat_addr.s_net = ATADDR_ANYNET;
283 lsat.sat_family = AF_APPLETALK;
284 sat = &lsat;
285 }
286
287 if (sat->sat_addr.s_node == ATADDR_ANYNODE &&
288 sat->sat_addr.s_net == ATADDR_ANYNET) {
289 if (at_ifaddr.tqh_first == NULL)
290 return (EADDRNOTAVAIL);
291 sat->sat_addr = AA_SAT(at_ifaddr.tqh_first)->sat_addr;
292 }
293 ddp->ddp_lsat = *sat;
294
295 /*
296 * Choose port.
297 */
298 if (sat->sat_port == ATADDR_ANYPORT) {
299 for (sat->sat_port = ATPORT_RESERVED;
300 sat->sat_port < ATPORT_LAST; sat->sat_port++) {
301 if (ddp_ports[sat->sat_port - 1] == 0)
302 break;
303 }
304 if (sat->sat_port == ATPORT_LAST) {
305 return (EADDRNOTAVAIL);
306 }
307 ddp->ddp_lsat.sat_port = sat->sat_port;
308 ddp_ports[sat->sat_port - 1] = ddp;
309 } else {
310 for (ddpp = ddp_ports[sat->sat_port - 1]; ddpp;
311 ddpp = ddpp->ddp_pnext) {
312 if (ddpp->ddp_lsat.sat_addr.s_net ==
313 sat->sat_addr.s_net &&
314 ddpp->ddp_lsat.sat_addr.s_node ==
315 sat->sat_addr.s_node)
316 break;
317 }
318 if (ddpp != NULL)
319 return (EADDRINUSE);
320
321 ddp->ddp_pnext = ddp_ports[sat->sat_port - 1];
322 ddp_ports[sat->sat_port - 1] = ddp;
323 if (ddp->ddp_pnext)
324 ddp->ddp_pnext->ddp_pprev = ddp;
325 }
326
327 return 0;
328 }
329
330 static int
331 at_pcbconnect(ddp, addr, p)
332 struct ddpcb *ddp;
333 struct mbuf *addr;
334 struct proc *p;
335 {
336 struct sockaddr_at *sat = mtod(addr, struct sockaddr_at *);
337 struct route *ro;
338 struct at_ifaddr *aa = 0;
339 struct ifnet *ifp;
340 u_short hintnet = 0, net;
341
342 if (addr->m_len != sizeof(*sat))
343 return (EINVAL);
344 if (sat->sat_family != AF_APPLETALK) {
345 return (EAFNOSUPPORT);
346 }
347 /*
348 * Under phase 2, network 0 means "the network". We take "the
349 * network" to mean the network the control block is bound to.
350 * If the control block is not bound, there is an error.
351 */
352 if (sat->sat_addr.s_net == ATADDR_ANYNET
353 && sat->sat_addr.s_node != ATADDR_ANYNODE) {
354 if (ddp->ddp_lsat.sat_port == ATADDR_ANYPORT) {
355 return (EADDRNOTAVAIL);
356 }
357 hintnet = ddp->ddp_lsat.sat_addr.s_net;
358 }
359 ro = &ddp->ddp_route;
360 /*
361 * If we've got an old route for this pcb, check that it is valid.
362 * If we've changed our address, we may have an old "good looking"
363 * route here. Attempt to detect it.
364 */
365 if (ro->ro_rt) {
366 if (hintnet) {
367 net = hintnet;
368 } else {
369 net = sat->sat_addr.s_net;
370 }
371 aa = 0;
372 if ((ifp = ro->ro_rt->rt_ifp) != NULL) {
373 for (aa = at_ifaddr.tqh_first; aa;
374 aa = aa->aa_list.tqe_next) {
375 if (aa->aa_ifp == ifp &&
376 ntohs(net) >= ntohs(aa->aa_firstnet) &&
377 ntohs(net) <= ntohs(aa->aa_lastnet)) {
378 break;
379 }
380 }
381 }
382 if (aa == NULL || (satosat(&ro->ro_dst)->sat_addr.s_net !=
383 (hintnet ? hintnet : sat->sat_addr.s_net) ||
384 satosat(&ro->ro_dst)->sat_addr.s_node !=
385 sat->sat_addr.s_node)) {
386 RTFREE(ro->ro_rt);
387 ro->ro_rt = (struct rtentry *) 0;
388 }
389 }
390 /*
391 * If we've got no route for this interface, try to find one.
392 */
393 if (ro->ro_rt == (struct rtentry *) 0 ||
394 ro->ro_rt->rt_ifp == (struct ifnet *) 0) {
395 bzero(&ro->ro_dst, sizeof(struct sockaddr_at));
396 ro->ro_dst.sa_len = sizeof(struct sockaddr_at);
397 ro->ro_dst.sa_family = AF_APPLETALK;
398 if (hintnet) {
399 satosat(&ro->ro_dst)->sat_addr.s_net = hintnet;
400 } else {
401 satosat(&ro->ro_dst)->sat_addr.s_net =
402 sat->sat_addr.s_net;
403 }
404 satosat(&ro->ro_dst)->sat_addr.s_node = sat->sat_addr.s_node;
405 rtalloc(ro);
406 }
407 /*
408 * Make sure any route that we have has a valid interface.
409 */
410 aa = 0;
411 if (ro->ro_rt && (ifp = ro->ro_rt->rt_ifp)) {
412 for (aa = at_ifaddr.tqh_first; aa; aa = aa->aa_list.tqe_next) {
413 if (aa->aa_ifp == ifp) {
414 break;
415 }
416 }
417 }
418 if (aa == 0) {
419 return (ENETUNREACH);
420 }
421 ddp->ddp_fsat = *sat;
422 if (ddp->ddp_lsat.sat_port == ATADDR_ANYPORT) {
423 return (at_pcbsetaddr(ddp, (struct mbuf *) 0, p));
424 }
425 return (0);
426 }
427
428 static void
429 at_pcbdisconnect(ddp)
430 struct ddpcb *ddp;
431 {
432 ddp->ddp_fsat.sat_addr.s_net = ATADDR_ANYNET;
433 ddp->ddp_fsat.sat_addr.s_node = ATADDR_ANYNODE;
434 ddp->ddp_fsat.sat_port = ATADDR_ANYPORT;
435 }
436
437 static int
438 at_pcballoc(so)
439 struct socket *so;
440 {
441 struct ddpcb *ddp;
442
443 MALLOC(ddp, struct ddpcb *, sizeof(*ddp), M_PCB, M_WAITOK|M_ZERO);
444 if (!ddp)
445 panic("at_pcballoc");
446 ddp->ddp_lsat.sat_port = ATADDR_ANYPORT;
447
448 ddp->ddp_next = ddpcb;
449 ddp->ddp_prev = NULL;
450 ddp->ddp_pprev = NULL;
451 ddp->ddp_pnext = NULL;
452 if (ddpcb) {
453 ddpcb->ddp_prev = ddp;
454 }
455 ddpcb = ddp;
456
457 ddp->ddp_socket = so;
458 so->so_pcb = (caddr_t) ddp;
459 #ifdef MBUFTRACE
460 so->so_rcv.sb_mowner = &atalk_rx_mowner;
461 so->so_snd.sb_mowner = &atalk_tx_mowner;
462 #endif
463 return (0);
464 }
465
466 static void
467 at_pcbdetach(so, ddp)
468 struct socket *so;
469 struct ddpcb *ddp;
470 {
471 soisdisconnected(so);
472 so->so_pcb = 0;
473 sofree(so);
474
475 /* remove ddp from ddp_ports list */
476 if (ddp->ddp_lsat.sat_port != ATADDR_ANYPORT &&
477 ddp_ports[ddp->ddp_lsat.sat_port - 1] != NULL) {
478 if (ddp->ddp_pprev != NULL) {
479 ddp->ddp_pprev->ddp_pnext = ddp->ddp_pnext;
480 } else {
481 ddp_ports[ddp->ddp_lsat.sat_port - 1] = ddp->ddp_pnext;
482 }
483 if (ddp->ddp_pnext != NULL) {
484 ddp->ddp_pnext->ddp_pprev = ddp->ddp_pprev;
485 }
486 }
487 if (ddp->ddp_route.ro_rt) {
488 rtfree(ddp->ddp_route.ro_rt);
489 }
490 if (ddp->ddp_prev) {
491 ddp->ddp_prev->ddp_next = ddp->ddp_next;
492 } else {
493 ddpcb = ddp->ddp_next;
494 }
495 if (ddp->ddp_next) {
496 ddp->ddp_next->ddp_prev = ddp->ddp_prev;
497 }
498 free(ddp, M_PCB);
499 }
500
501 /*
502 * For the moment, this just find the pcb with the correct local address.
503 * In the future, this will actually do some real searching, so we can use
504 * the sender's address to do de-multiplexing on a single port to many
505 * sockets (pcbs).
506 */
507 struct ddpcb *
508 ddp_search(from, to, aa)
509 struct sockaddr_at *from;
510 struct sockaddr_at *to;
511 struct at_ifaddr *aa;
512 {
513 struct ddpcb *ddp;
514
515 /*
516 * Check for bad ports.
517 */
518 if (to->sat_port < ATPORT_FIRST || to->sat_port >= ATPORT_LAST) {
519 return (NULL);
520 }
521 /*
522 * Make sure the local address matches the sent address. What about
523 * the interface?
524 */
525 for (ddp = ddp_ports[to->sat_port - 1]; ddp; ddp = ddp->ddp_pnext) {
526 /* XXX should we handle 0.YY? */
527
528 /* XXXX.YY to socket on destination interface */
529 if (to->sat_addr.s_net == ddp->ddp_lsat.sat_addr.s_net &&
530 to->sat_addr.s_node == ddp->ddp_lsat.sat_addr.s_node) {
531 break;
532 }
533 /* 0.255 to socket on receiving interface */
534 if (to->sat_addr.s_node == ATADDR_BCAST &&
535 (to->sat_addr.s_net == 0 ||
536 to->sat_addr.s_net == ddp->ddp_lsat.sat_addr.s_net) &&
537 ddp->ddp_lsat.sat_addr.s_net == AA_SAT(aa)->sat_addr.s_net) {
538 break;
539 }
540 /* XXXX.0 to socket on destination interface */
541 if (to->sat_addr.s_net == aa->aa_firstnet &&
542 to->sat_addr.s_node == 0 &&
543 ntohs(ddp->ddp_lsat.sat_addr.s_net) >=
544 ntohs(aa->aa_firstnet) &&
545 ntohs(ddp->ddp_lsat.sat_addr.s_net) <=
546 ntohs(aa->aa_lastnet)) {
547 break;
548 }
549 }
550 return (ddp);
551 }
552
553 /*
554 * Initialize all the ddp & appletalk stuff
555 */
556 void
557 ddp_init()
558 {
559 TAILQ_INIT(&at_ifaddr);
560 atintrq1.ifq_maxlen = IFQ_MAXLEN;
561 atintrq2.ifq_maxlen = IFQ_MAXLEN;
562
563 MOWNER_ATTACH(&atalk_tx_mowner);
564 MOWNER_ATTACH(&atalk_rx_mowner);
565 }
566
567 #if 0
568 static void
569 ddp_clean()
570 {
571 struct ddpcb *ddp;
572
573 for (ddp = ddpcb; ddp; ddp = ddp->ddp_next)
574 at_pcbdetach(ddp->ddp_socket, ddp);
575 }
576 #endif
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