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5
6#include <linux/string.h>
7#include <linux/net.h>
8
9#include <linux/errno.h>
10#include <linux/kernel.h>
11#include <linux/skbuff.h>
12#include <linux/wait.h>
13#include <linux/sched.h>
14#include <linux/fcntl.h>
15#include <linux/init.h>
16#include <linux/atm.h>
17#include <linux/atmsap.h>
18#include <linux/atmsvc.h>
19#include <linux/atmdev.h>
20#include <linux/bitops.h>
21#include <net/sock.h>
22#include <asm/uaccess.h>
23
24#include "resources.h"
25#include "common.h"
26#include "signaling.h"
27#include "addr.h"
28
29
30#if 0
31#define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
32#else
33#define DPRINTK(format,args...)
34#endif
35
36
37static int svc_create(struct socket *sock,int protocol);
38
39
40
41
42
43
44
45
46
47void svc_callback(struct atm_vcc *vcc)
48{
49 wake_up(&vcc->sleep);
50}
51
52
53
54
55static int svc_shutdown(struct socket *sock,int how)
56{
57 return 0;
58}
59
60
61static void svc_disconnect(struct atm_vcc *vcc)
62{
63 DECLARE_WAITQUEUE(wait,current);
64 struct sk_buff *skb;
65
66 DPRINTK("svc_disconnect %p\n",vcc);
67 if (test_bit(ATM_VF_REGIS,&vcc->flags)) {
68 add_wait_queue(&vcc->sleep,&wait);
69 sigd_enq(vcc,as_close,NULL,NULL,NULL);
70 while (!test_bit(ATM_VF_RELEASED,&vcc->flags) && sigd) {
71 set_current_state(TASK_UNINTERRUPTIBLE);
72 schedule();
73 }
74 remove_wait_queue(&vcc->sleep,&wait);
75 }
76
77
78 while ((skb = skb_dequeue(&vcc->sk->receive_queue))) {
79 DPRINTK("LISTEN REL\n");
80 sigd_enq2(NULL,as_reject,vcc,NULL,NULL,&vcc->qos,0);
81 dev_kfree_skb(skb);
82 }
83 clear_bit(ATM_VF_REGIS,&vcc->flags);
84 clear_bit(ATM_VF_RELEASED,&vcc->flags);
85 clear_bit(ATM_VF_CLOSE,&vcc->flags);
86
87}
88
89
90static int svc_release(struct socket *sock)
91{
92 struct sock *sk = sock->sk;
93 struct atm_vcc *vcc;
94
95 if (sk) {
96 vcc = ATM_SD(sock);
97 DPRINTK("svc_release %p\n", vcc);
98 clear_bit(ATM_VF_READY, &vcc->flags);
99
100
101
102 sock_hold(sk);
103 vcc_release(sock);
104 svc_disconnect(vcc);
105 sock_put(sk);
106 }
107 return 0;
108}
109
110
111static int svc_bind(struct socket *sock,struct sockaddr *sockaddr,
112 int sockaddr_len)
113{
114 DECLARE_WAITQUEUE(wait,current);
115 struct sock *sk = sock->sk;
116 struct sockaddr_atmsvc *addr;
117 struct atm_vcc *vcc;
118 int error;
119
120 if (sockaddr_len != sizeof(struct sockaddr_atmsvc))
121 return -EINVAL;
122 lock_sock(sk);
123 if (sock->state == SS_CONNECTED) {
124 error = -EISCONN;
125 goto out;
126 }
127 if (sock->state != SS_UNCONNECTED) {
128 error = -EINVAL;
129 goto out;
130 }
131 vcc = ATM_SD(sock);
132 if (test_bit(ATM_VF_SESSION, &vcc->flags)) {
133 error = -EINVAL;
134 goto out;
135 }
136 addr = (struct sockaddr_atmsvc *) sockaddr;
137 if (addr->sas_family != AF_ATMSVC) {
138 error = -EAFNOSUPPORT;
139 goto out;
140 }
141 clear_bit(ATM_VF_BOUND,&vcc->flags);
142
143
144 if (!test_bit(ATM_VF_HASQOS,&vcc->flags)) {
145 error = -EBADFD;
146 goto out;
147 }
148 vcc->local = *addr;
149 vcc->reply = WAITING;
150 add_wait_queue(&vcc->sleep,&wait);
151 sigd_enq(vcc,as_bind,NULL,NULL,&vcc->local);
152 while (vcc->reply == WAITING && sigd) {
153 set_current_state(TASK_UNINTERRUPTIBLE);
154 schedule();
155 }
156 remove_wait_queue(&vcc->sleep,&wait);
157 clear_bit(ATM_VF_REGIS,&vcc->flags);
158 if (!sigd) {
159 error = -EUNATCH;
160 goto out;
161 }
162 if (!vcc->reply)
163 set_bit(ATM_VF_BOUND,&vcc->flags);
164 error = vcc->reply;
165out:
166 release_sock(sk);
167 return error;
168}
169
170
171static int svc_connect(struct socket *sock,struct sockaddr *sockaddr,
172 int sockaddr_len,int flags)
173{
174 DECLARE_WAITQUEUE(wait,current);
175 struct sock *sk = sock->sk;
176 struct sockaddr_atmsvc *addr;
177 struct atm_vcc *vcc = ATM_SD(sock);
178 int error;
179
180 DPRINTK("svc_connect %p\n",vcc);
181 lock_sock(sk);
182 if (sockaddr_len != sizeof(struct sockaddr_atmsvc)) {
183 error = -EINVAL;
184 goto out;
185 }
186
187 switch (sock->state) {
188 default:
189 error = -EINVAL;
190 goto out;
191 case SS_CONNECTED:
192 error = -EISCONN;
193 goto out;
194 case SS_CONNECTING:
195 if (vcc->reply == WAITING) {
196 error = -EALREADY;
197 goto out;
198 }
199 sock->state = SS_UNCONNECTED;
200 if (vcc->reply) {
201 error = vcc->reply;
202 goto out;
203 }
204 break;
205 case SS_UNCONNECTED:
206 if (test_bit(ATM_VF_SESSION, &vcc->flags)) {
207 error = -EINVAL;
208 goto out;
209 }
210 addr = (struct sockaddr_atmsvc *) sockaddr;
211 if (addr->sas_family != AF_ATMSVC) {
212 error = -EAFNOSUPPORT;
213 goto out;
214 }
215 if (!test_bit(ATM_VF_HASQOS, &vcc->flags)) {
216 error = -EBADFD;
217 goto out;
218 }
219 if (vcc->qos.txtp.traffic_class == ATM_ANYCLASS ||
220 vcc->qos.rxtp.traffic_class == ATM_ANYCLASS) {
221 error = -EINVAL;
222 goto out;
223 }
224 if (!vcc->qos.txtp.traffic_class &&
225 !vcc->qos.rxtp.traffic_class) {
226 error = -EINVAL;
227 goto out;
228 }
229 vcc->remote = *addr;
230 vcc->reply = WAITING;
231 add_wait_queue(&vcc->sleep,&wait);
232 sigd_enq(vcc,as_connect,NULL,NULL,&vcc->remote);
233 if (flags & O_NONBLOCK) {
234 remove_wait_queue(&vcc->sleep,&wait);
235 sock->state = SS_CONNECTING;
236 error = -EINPROGRESS;
237 goto out;
238 }
239 error = 0;
240 while (vcc->reply == WAITING && sigd) {
241 set_current_state(TASK_INTERRUPTIBLE);
242 schedule();
243 if (!signal_pending(current)) continue;
244 DPRINTK("*ABORT*\n");
245
246
247
248
249
250
251
252
253
254
255
256
257 sigd_enq(vcc,as_close,NULL,NULL,NULL);
258 while (vcc->reply == WAITING && sigd) {
259 set_current_state(TASK_UNINTERRUPTIBLE);
260 schedule();
261 }
262 if (!vcc->reply)
263 while (!test_bit(ATM_VF_RELEASED,&vcc->flags)
264 && sigd) {
265 set_current_state(TASK_UNINTERRUPTIBLE);
266 schedule();
267 }
268 clear_bit(ATM_VF_REGIS,&vcc->flags);
269 clear_bit(ATM_VF_RELEASED,&vcc->flags);
270 clear_bit(ATM_VF_CLOSE,&vcc->flags);
271
272 error = -EINTR;
273 break;
274 }
275 remove_wait_queue(&vcc->sleep,&wait);
276 if (error)
277 goto out;
278 if (!sigd) {
279 error = -EUNATCH;
280 goto out;
281 }
282 if (vcc->reply) {
283 error = vcc->reply;
284 goto out;
285 }
286 }
287
288
289
290
291
292 vcc->qos.txtp.max_pcr = SELECT_TOP_PCR(vcc->qos.txtp);
293 vcc->qos.txtp.pcr = 0;
294 vcc->qos.txtp.min_pcr = 0;
295
296
297
298 if (!(error = vcc_connect(sock, vcc->itf, vcc->vpi, vcc->vci)))
299 sock->state = SS_CONNECTED;
300 else (void) svc_disconnect(vcc);
301out:
302 release_sock(sk);
303 return error;
304}
305
306
307static int svc_listen(struct socket *sock,int backlog)
308{
309 DECLARE_WAITQUEUE(wait,current);
310 struct sock *sk = sock->sk;
311 struct atm_vcc *vcc = ATM_SD(sock);
312 int error;
313
314 DPRINTK("svc_listen %p\n",vcc);
315 lock_sock(sk);
316
317 if (test_bit(ATM_VF_SESSION,&vcc->flags)) {
318 error = -EINVAL;
319 goto out;
320 }
321 vcc->reply = WAITING;
322 add_wait_queue(&vcc->sleep,&wait);
323 sigd_enq(vcc,as_listen,NULL,NULL,&vcc->local);
324 while (vcc->reply == WAITING && sigd) {
325 set_current_state(TASK_UNINTERRUPTIBLE);
326 schedule();
327 }
328 remove_wait_queue(&vcc->sleep,&wait);
329 if (!sigd) {
330 error = -EUNATCH;
331 goto out;
332 }
333 set_bit(ATM_VF_LISTEN,&vcc->flags);
334 vcc->sk->max_ack_backlog = backlog > 0 ? backlog : ATM_BACKLOG_DEFAULT;
335 error = vcc->reply;
336out:
337 release_sock(sk);
338 return error;
339}
340
341
342static int svc_accept(struct socket *sock,struct socket *newsock,int flags)
343{
344 struct sock *sk = sock->sk;
345 struct sk_buff *skb;
346 struct atmsvc_msg *msg;
347 struct atm_vcc *old_vcc = ATM_SD(sock);
348 struct atm_vcc *new_vcc;
349 int error;
350
351 lock_sock(sk);
352
353 error = svc_create(newsock,0);
354 if (error)
355 goto out;
356
357 new_vcc = ATM_SD(newsock);
358
359 DPRINTK("svc_accept %p -> %p\n",old_vcc,new_vcc);
360 while (1) {
361 DECLARE_WAITQUEUE(wait,current);
362
363 add_wait_queue(&old_vcc->sleep,&wait);
364 while (!(skb = skb_dequeue(&old_vcc->sk->receive_queue)) && sigd) {
365 if (test_bit(ATM_VF_RELEASED,&old_vcc->flags)) break;
366 if (test_bit(ATM_VF_CLOSE,&old_vcc->flags)) {
367 error = old_vcc->reply;
368 break;
369 }
370 if (flags & O_NONBLOCK) {
371 error = -EAGAIN;
372 break;
373 }
374 release_sock(sk);
375 schedule();
376 lock_sock(sk);
377 if (signal_pending(current)) {
378 error = -ERESTARTSYS;
379 break;
380 }
381 }
382 remove_wait_queue(&old_vcc->sleep,&wait);
383 if (error)
384 goto out;
385 if (!skb) {
386 error = -EUNATCH;
387 goto out;
388 }
389 msg = (struct atmsvc_msg *) skb->data;
390 new_vcc->qos = msg->qos;
391 set_bit(ATM_VF_HASQOS,&new_vcc->flags);
392 new_vcc->remote = msg->svc;
393 new_vcc->local = msg->local;
394 new_vcc->sap = msg->sap;
395 error = vcc_connect(newsock, msg->pvc.sap_addr.itf,
396 msg->pvc.sap_addr.vpi, msg->pvc.sap_addr.vci);
397 dev_kfree_skb(skb);
398 old_vcc->sk->ack_backlog--;
399 if (error) {
400 sigd_enq2(NULL,as_reject,old_vcc,NULL,NULL,
401 &old_vcc->qos,error);
402 error = error == -EAGAIN ? -EBUSY : error;
403 goto out;
404 }
405
406 new_vcc->reply = WAITING;
407 add_wait_queue(&new_vcc->sleep,&wait);
408 sigd_enq(new_vcc,as_accept,old_vcc,NULL,NULL);
409 while (new_vcc->reply == WAITING && sigd) {
410 set_current_state(TASK_UNINTERRUPTIBLE);
411 release_sock(sk);
412 schedule();
413 lock_sock(sk);
414 }
415 remove_wait_queue(&new_vcc->sleep,&wait);
416 if (!sigd) {
417 error = -EUNATCH;
418 goto out;
419 }
420 if (!new_vcc->reply) break;
421 if (new_vcc->reply != -ERESTARTSYS) {
422 error = new_vcc->reply;
423 goto out;
424 }
425 }
426 newsock->state = SS_CONNECTED;
427out:
428 release_sock(sk);
429 return error;
430}
431
432
433static int svc_getname(struct socket *sock,struct sockaddr *sockaddr,
434 int *sockaddr_len,int peer)
435{
436 struct sockaddr_atmsvc *addr;
437
438 *sockaddr_len = sizeof(struct sockaddr_atmsvc);
439 addr = (struct sockaddr_atmsvc *) sockaddr;
440 memcpy(addr,peer ? &ATM_SD(sock)->remote : &ATM_SD(sock)->local,
441 sizeof(struct sockaddr_atmsvc));
442 return 0;
443}
444
445
446int svc_change_qos(struct atm_vcc *vcc,struct atm_qos *qos)
447{
448 DECLARE_WAITQUEUE(wait,current);
449
450 vcc->reply = WAITING;
451 add_wait_queue(&vcc->sleep,&wait);
452 sigd_enq2(vcc,as_modify,NULL,NULL,&vcc->local,qos,0);
453 while (vcc->reply == WAITING && !test_bit(ATM_VF_RELEASED,&vcc->flags)
454 && sigd) {
455 set_current_state(TASK_UNINTERRUPTIBLE);
456 schedule();
457 }
458 remove_wait_queue(&vcc->sleep,&wait);
459 if (!sigd) return -EUNATCH;
460 return vcc->reply;
461}
462
463
464static int svc_setsockopt(struct socket *sock,int level,int optname,
465 char *optval,int optlen)
466{
467 struct sock *sk = sock->sk;
468 struct atm_vcc *vcc;
469 int error = 0;
470
471 if (!__SO_LEVEL_MATCH(optname, level) || optname != SO_ATMSAP ||
472 optlen != sizeof(struct atm_sap)) {
473 error = vcc_setsockopt(sock, level, optname, optval, optlen);
474 goto out;
475 }
476 vcc = ATM_SD(sock);
477 if (copy_from_user(&vcc->sap, optval, optlen)) {
478 error = -EFAULT;
479 goto out;
480 }
481 set_bit(ATM_VF_HASSAP, &vcc->flags);
482out:
483 release_sock(sk);
484 return error;
485}
486
487
488static int svc_getsockopt(struct socket *sock,int level,int optname,
489 char *optval,int *optlen)
490{
491 struct sock *sk = sock->sk;
492 int error = 0, len;
493
494 lock_sock(sk);
495 if (!__SO_LEVEL_MATCH(optname, level) || optname != SO_ATMSAP) {
496 error = vcc_getsockopt(sock, level, optname, optval, optlen);
497 goto out;
498 }
499 if (get_user(len, optlen)) {
500 error = -EFAULT;
501 goto out;
502 }
503 if (len != sizeof(struct atm_sap)) {
504 error = -EINVAL;
505 goto out;
506 }
507 if (copy_to_user(optval, &ATM_SD(sock)->sap, sizeof(struct atm_sap))) {
508 error = -EFAULT;
509 goto out;
510 }
511out:
512 release_sock(sk);
513 return error;
514}
515
516
517static struct proto_ops svc_proto_ops = {
518 .family = PF_ATMSVC,
519
520 .release = svc_release,
521 .bind = svc_bind,
522 .connect = svc_connect,
523 .socketpair = sock_no_socketpair,
524 .accept = svc_accept,
525 .getname = svc_getname,
526 .poll = atm_poll,
527 .ioctl = vcc_ioctl,
528 .listen = svc_listen,
529 .shutdown = svc_shutdown,
530 .setsockopt = svc_setsockopt,
531 .getsockopt = svc_getsockopt,
532 .sendmsg = vcc_sendmsg,
533 .recvmsg = vcc_recvmsg,
534 .mmap = sock_no_mmap,
535 .sendpage = sock_no_sendpage,
536};
537
538
539static int svc_create(struct socket *sock,int protocol)
540{
541 int error;
542
543 sock->ops = &svc_proto_ops;
544 error = vcc_create(sock, protocol, AF_ATMSVC);
545 if (error) return error;
546 ATM_SD(sock)->callback = svc_callback;
547 ATM_SD(sock)->local.sas_family = AF_ATMSVC;
548 ATM_SD(sock)->remote.sas_family = AF_ATMSVC;
549 return 0;
550}
551
552
553static struct net_proto_family svc_family_ops = {
554 PF_ATMSVC,
555 svc_create,
556 0,
557 0,
558 0
559};
560
561
562
563
564
565
566int atmsvc_init(void)
567{
568 return sock_register(&svc_family_ops);
569}
570
571void atmsvc_exit(void)
572{
573 sock_unregister(PF_ATMSVC);
574}
575
