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x86_64: Fix a warning.
[dragonfly.git] / usr.sbin / atm / scspd / scsp_socket.c
blob974532e9d0c8610f9366558e36e77f547c4d69ff
1 /*
2 *
3 * ===================================
4 * HARP | Host ATM Research Platform
5 * ===================================
6 *
7 *
8 * This Host ATM Research Platform ("HARP") file (the "Software") is
9 * made available by Network Computing Services, Inc. ("NetworkCS")
10 * "AS IS". NetworkCS does not provide maintenance, improvements or
11 * support of any kind.
12 *
13 * NETWORKCS MAKES NO WARRANTIES OR REPRESENTATIONS, EXPRESS OR IMPLIED,
14 * INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY
15 * AND FITNESS FOR A PARTICULAR PURPOSE, AS TO ANY ELEMENT OF THE
16 * SOFTWARE OR ANY SUPPORT PROVIDED IN CONNECTION WITH THIS SOFTWARE.
17 * In no event shall NetworkCS be responsible for any damages, including
18 * but not limited to consequential damages, arising from or relating to
19 * any use of the Software or related support.
20 *
21 * Copyright 1994-1998 Network Computing Services, Inc.
22 *
23 * Copies of this Software may be made, however, the above copyright
24 * notice must be reproduced on all copies.
25 *
26 * @(#) $FreeBSD: src/usr.sbin/atm/scspd/scsp_socket.c,v 1.3 1999/08/28 01:15:34 peter Exp $
27 * @(#) $DragonFly: src/usr.sbin/atm/scspd/scsp_socket.c,v 1.5 2006/08/03 16:40:48 swildner Exp $
28 */
29
30
31 /*
32 * Server Cache Synchronization Protocol (SCSP) Support
33 * ----------------------------------------------------
34 *
35 * SCSP socket management routines
36 *
37 */
38
39 #include <sys/types.h>
40 #include <sys/param.h>
41 #include <sys/socket.h>
42 #include <net/if.h>
43 #include <netinet/in.h>
44 #include <netatm/port.h>
45 #include <netatm/queue.h>
46 #include <netatm/atm.h>
47 #include <netatm/atm_if.h>
48 #include <netatm/atm_sap.h>
49 #include <netatm/atm_sys.h>
50 #include <netatm/atm_ioctl.h>
51
52 #include <errno.h>
53 #include <fcntl.h>
54 #include <libatm.h>
55 #include <stdio.h>
56 #include <stdlib.h>
57 #include <string.h>
58 #include <syslog.h>
59 #include <unistd.h>
60
61 #include "scsp_msg.h"
62 #include "scsp_if.h"
63 #include "scsp_var.h"
64
65 /*
66 * Local variables
67 */
68 static struct t_atm_llc llc_scsp = {
69 T_ATM_LLC_SHARING,
70 8,
71 {0xaa, 0xaa, 0x03, 0x00, 0x00, 0x5e, 0x00, 0x05}
72 };
73
74 static struct t_atm_aal5 aal5 = {
75 0, /* forward_max_SDU_size */
76 0, /* backward_max_SDU_size */
77 0 /* SSCS_type */
78 };
79
80 static struct t_atm_traffic traffic = {
81 { /* forward */
82 T_ATM_ABSENT, /* PCR_high_priority */
83 0, /* PCR_all_traffic */
84 T_ATM_ABSENT, /* SCR_high_priority */
85 T_ATM_ABSENT, /* SCR_all_traffic */
86 T_ATM_ABSENT, /* MBS_high_priority */
87 T_ATM_ABSENT, /* MBS_all_traffic */
88 T_NO /* tagging */
89 },
90 { /* backward */
91 T_ATM_ABSENT, /* PCR_high_priority */
92 0, /* PCR_all_traffic */
93 T_ATM_ABSENT, /* SCR_high_priority */
94 T_ATM_ABSENT, /* SCR_all_traffic */
95 T_ATM_ABSENT, /* MBS_high_priority */
96 T_ATM_ABSENT, /* MBS_all_traffic */
97 T_NO /* tagging */
98 },
99 T_YES /* best_effort */
100 };
101
102 static struct t_atm_bearer bearer = {
103 T_ATM_CLASS_X, /* bearer_class */
104 T_ATM_NULL, /* traffic_type */
105 T_ATM_NULL, /* timing_requirements */
106 T_NO, /* clipping_susceptibility */
107 T_ATM_1_TO_1 /* connection_configuration */
108 };
109
110 static struct t_atm_qos qos = {
111 T_ATM_NETWORK_CODING, /* coding_standard */
112 { /* forward */
113 T_ATM_QOS_CLASS_0 /* qos_class */
114 },
115 { /* backward */
116 T_ATM_QOS_CLASS_0 /* qos_class */
117 }
118 };
119
120 static struct t_atm_app_name appname = {
121 "SCSP"
122 };
123
124
125 /*
126 * Find a DCS, given its socket
127 *
128 * Arguments:
129 * sd socket descriptor
130 *
131 * Returns:
132 * 0 not found
133 * address of DCS block corresponding to socket
134 *
135 */
136 Scsp_dcs *
137 scsp_find_dcs(int sd)
138 {
139 Scsp_server *ssp;
140 Scsp_dcs *dcsp = NULL;
141
142 /*
143 * Loop through the list of servers
144 */
145 for (ssp = scsp_server_head; ssp; ssp = ssp->ss_next) {
146 /*
147 * Check all the DCSs chained from each server
148 */
149 for (dcsp = ssp->ss_dcs; dcsp; dcsp = dcsp->sd_next) {
150 if (dcsp->sd_sock == sd)
151 break;
152 }
153 }
154
155 return(dcsp);
156 }
157
158
159 /*
160 * Find a server, given its socket
161 *
162 * Arguments:
163 * sd socket descriptor
164 *
165 * Returns:
166 * 0 not found
167 * address of server block corresponding to socket
168 *
169 */
170 Scsp_server *
171 scsp_find_server(int sd)
172 {
173 Scsp_server *ssp;
174
175 /*
176 * Loop through the list of servers
177 */
178 for (ssp = scsp_server_head; ssp; ssp = ssp->ss_next) {
179 if (ssp->ss_sock == sd)
180 break;
181 }
182
183 return(ssp);
184 }
185
186
187 /*
188 * Connect to a directly connected server
189 *
190 * Arguments:
191 * dcsp pointer to DCS block for server
192 *
193 * Returns:
194 * 0 success (dcsp->sd_sock is set)
195 * else errno indicating reason for failure
196 *
197 */
198 int
199 scsp_dcs_connect(Scsp_dcs *dcsp)
200
201 {
202 int rc, sd;
203 struct sockaddr_atm DCS_addr;
204
205 /*
206 * If the DCS already has an open connection, just return
207 */
208 if (dcsp->sd_sock != -1) {
209 return(0);
210 }
211
212 /*
213 * Open an ATM socket
214 */
215 sd = socket(PF_ATM, SOCK_SEQPACKET, ATM_PROTO_AAL5);
216 if (sd == -1) {
217 return(ESOCKTNOSUPPORT);
218 }
219 if (sd > scsp_max_socket) {
220 scsp_max_socket = sd;
221 }
222
223 /*
224 * Set up connection parameters for SCSP connection
225 */
226 UM_ZERO(&DCS_addr, sizeof(DCS_addr));
227 #if (defined(BSD) && (BSD >= 199103))
228 DCS_addr.satm_len = sizeof(DCS_addr);
229 #endif
230 DCS_addr.satm_family = AF_ATM;
231 DCS_addr.satm_addr.t_atm_sap_addr.SVE_tag_addr =
232 T_ATM_PRESENT;
233 DCS_addr.satm_addr.t_atm_sap_addr.SVE_tag_selector =
234 T_ATM_PRESENT;
235 DCS_addr.satm_addr.t_atm_sap_addr.address_format =
236 dcsp->sd_addr.address_format;
237 DCS_addr.satm_addr.t_atm_sap_addr.address_length =
238 dcsp->sd_addr.address_length;
239 UM_COPY(dcsp->sd_addr.address,
240 DCS_addr.satm_addr.t_atm_sap_addr.address,
241 dcsp->sd_addr.address_length);
242
243 DCS_addr.satm_addr.t_atm_sap_layer2.SVE_tag =
244 T_ATM_PRESENT;
245 DCS_addr.satm_addr.t_atm_sap_layer2.ID_type =
246 T_ATM_SIMPLE_ID;
247 DCS_addr.satm_addr.t_atm_sap_layer2.ID.simple_ID =
248 T_ATM_BLLI2_I8802;
249
250 DCS_addr.satm_addr.t_atm_sap_layer3.SVE_tag =
251 T_ATM_ABSENT;
252 DCS_addr.satm_addr.t_atm_sap_appl.SVE_tag =
253 T_ATM_ABSENT;
254
255 /*
256 * Bind the socket to our address
257 */
258 if (bind(sd, (struct sockaddr *)&DCS_addr,
259 sizeof(DCS_addr))) {
260 rc = errno;
261 goto connect_fail;
262 }
263
264 /*
265 * Set non-blocking operation
266 */
267 #ifdef sun
268 rc = fcntl(sd, F_SETFL, FNBIO + FNDELAY);
269 #else
270 rc = fcntl(sd, F_SETFL, O_NONBLOCK);
271 #endif
272 if (rc == -1) {
273 scsp_log(LOG_ERR, "scsp_dcs_connect: fcntl failed");
274 rc = errno;
275 goto connect_fail;
276 }
277
278 /*
279 * Set AAL 5 options
280 */
281 aal5.forward_max_SDU_size = dcsp->sd_server->ss_mtu;
282 aal5.backward_max_SDU_size = dcsp->sd_server->ss_mtu;
283 if (setsockopt(sd, T_ATM_SIGNALING, T_ATM_AAL5, (caddr_t)&aal5,
284 sizeof(aal5)) < 0) {
285 rc = EOPNOTSUPP;
286 goto connect_fail;
287 }
288
289 /*
290 * Set traffic options
291 */
292 switch(dcsp->sd_server->ss_media) {
293 case MEDIA_TAXI_100:
294 traffic.forward.PCR_all_traffic = ATM_PCR_TAXI100;
295 traffic.backward.PCR_all_traffic = ATM_PCR_TAXI100;
296 break;
297 case MEDIA_TAXI_140:
298 traffic.forward.PCR_all_traffic = ATM_PCR_TAXI140;
299 traffic.backward.PCR_all_traffic = ATM_PCR_TAXI140;
300 break;
301 case MEDIA_OC3C:
302 case MEDIA_UTP155:
303 traffic.forward.PCR_all_traffic = ATM_PCR_OC3C;
304 traffic.backward.PCR_all_traffic = ATM_PCR_OC3C;
305 break;
306 case MEDIA_OC12C:
307 traffic.forward.PCR_all_traffic = ATM_PCR_OC12C;
308 traffic.backward.PCR_all_traffic = ATM_PCR_OC12C;
309 break;
310 case MEDIA_UNKNOWN:
311 break;
312 }
313
314 if (setsockopt(sd, T_ATM_SIGNALING, T_ATM_TRAFFIC,
315 (caddr_t)&traffic, sizeof(traffic)) < 0) {
316 rc = EOPNOTSUPP;
317 goto connect_fail;
318 }
319
320 /*
321 * Set bearer capability options
322 */
323 if (setsockopt(sd, T_ATM_SIGNALING, T_ATM_BEARER_CAP,
324 (caddr_t)&bearer, sizeof(bearer)) < 0) {
325 rc = EOPNOTSUPP;
326 goto connect_fail;
327 }
328
329 /*
330 * Set QOS options
331 */
332 if (setsockopt(sd, T_ATM_SIGNALING, T_ATM_QOS,
333 (caddr_t)&qos, sizeof(qos)) < 0) {
334 rc = EOPNOTSUPP;
335 goto connect_fail;
336 }
337
338 /*
339 * Set LLC identifier
340 */
341 if (setsockopt(sd, T_ATM_SIGNALING, T_ATM_LLC,
342 (caddr_t)&llc_scsp, sizeof(llc_scsp)) < 0) {
343 rc = EOPNOTSUPP;
344 goto connect_fail;
345 }
346
347 /*
348 * Set application name
349 */
350 if (setsockopt(sd, T_ATM_SIGNALING, T_ATM_APP_NAME,
351 (caddr_t)&appname, sizeof(appname)) < 0) {
352 rc = EOPNOTSUPP;
353 goto connect_fail;
354 }
355
356 /*
357 * Connect to DCS
358 */
359 if (connect(sd, (struct sockaddr *)&DCS_addr,
360 sizeof(DCS_addr)) < 0 &&
361 errno != EINPROGRESS) {
362 rc = errno;
363 goto connect_fail;
364 }
365
366 /*
367 * Set return values
368 */
369 dcsp->sd_sock = sd;
370 return(0);
371
372 connect_fail:
373 /*
374 * Close the socket if something didn't work
375 */
376 close(sd);
377 dcsp->sd_sock = -1;
378 if (rc == 0)
379 rc = EFAULT;
380 return(rc);
381 }
382
383
384 /*
385 * Listen for ATM connections from DCSs
386 *
387 * Arguments:
388 * None
389 *
390 * Returns:
391 * sock socket which is listening (also set in
392 ssp->ss_dcs_lsock)
393 * -1 error encountered (reason in errno)
394 *
395 */
396 int
397 scsp_dcs_listen(Scsp_server *ssp)
398 {
399 int rc, sd;
400 struct sockaddr_atm ls_addr;
401
402 /*
403 * Open a socket
404 */
405 sd = socket(PF_ATM, SOCK_SEQPACKET, ATM_PROTO_AAL5);
406 if (sd == -1) {
407 rc = errno;
408 goto listen_fail;
409 }
410 if (sd > scsp_max_socket) {
411 scsp_max_socket = sd;
412 }
413
414 /*
415 * Set up our address
416 */
417 UM_ZERO(&ls_addr, sizeof(ls_addr));
418 #if (defined(BSD) && (BSD >= 199103))
419 ls_addr.satm_len = sizeof(ls_addr);
420 #endif
421 ls_addr.satm_family = AF_ATM;
422 ls_addr.satm_addr.t_atm_sap_addr.SVE_tag_addr = T_ATM_PRESENT;
423 ls_addr.satm_addr.t_atm_sap_addr.SVE_tag_selector =
424 T_ATM_PRESENT;
425 ls_addr.satm_addr.t_atm_sap_addr.address_format =
426 ssp->ss_addr.address_format;
427 ls_addr.satm_addr.t_atm_sap_addr.address_length =
428 ssp->ss_addr.address_length;
429 UM_COPY(ssp->ss_addr.address,
430 ls_addr.satm_addr.t_atm_sap_addr.address,
431 ssp->ss_addr.address_length);
432
433 ls_addr.satm_addr.t_atm_sap_layer2.SVE_tag = T_ATM_PRESENT;
434 ls_addr.satm_addr.t_atm_sap_layer2.ID_type = T_ATM_SIMPLE_ID;
435 ls_addr.satm_addr.t_atm_sap_layer2.ID.simple_ID =
436 T_ATM_BLLI2_I8802;
437
438 ls_addr.satm_addr.t_atm_sap_layer3.SVE_tag = T_ATM_ABSENT;
439 ls_addr.satm_addr.t_atm_sap_appl.SVE_tag = T_ATM_ABSENT;
440
441 /*
442 * Bind the socket to our address
443 */
444 rc = bind(sd, (struct sockaddr *)&ls_addr, sizeof(ls_addr));
445 if (rc == -1) {
446 rc = errno;
447 goto listen_fail;
448 }
449
450 /*
451 * Set non-blocking I/O
452 */
453 #ifdef sun
454 rc = fcntl(sd, F_SETFL, FNBIO + FNDELAY);
455 #else
456 rc = fcntl(sd, F_SETFL, O_NONBLOCK);
457 #endif
458 if (rc == -1) {
459 scsp_log(LOG_ERR, "scsp_dcs_listen: fcntl failed");
460 rc = errno;
461 goto listen_fail;
462 }
463
464 /*
465 * Set AAL 5 options
466 */
467 aal5.forward_max_SDU_size = ssp->ss_mtu;
468 aal5.backward_max_SDU_size = ssp->ss_mtu;
469 if (setsockopt(sd, T_ATM_SIGNALING, T_ATM_AAL5, (caddr_t)&aal5,
470 sizeof(aal5)) < 0) {
471 rc = EOPNOTSUPP;
472 goto listen_fail;
473 }
474
475 /*
476 * Set traffic options
477 */
478 switch(ssp->ss_media) {
479 case MEDIA_TAXI_100:
480 traffic.forward.PCR_all_traffic = ATM_PCR_TAXI100;
481 traffic.backward.PCR_all_traffic = ATM_PCR_TAXI100;
482 break;
483 case MEDIA_TAXI_140:
484 traffic.forward.PCR_all_traffic = ATM_PCR_TAXI140;
485 traffic.backward.PCR_all_traffic = ATM_PCR_TAXI140;
486 break;
487 case MEDIA_OC3C:
488 case MEDIA_UTP155:
489 traffic.forward.PCR_all_traffic = ATM_PCR_OC3C;
490 traffic.backward.PCR_all_traffic = ATM_PCR_OC3C;
491 break;
492 case MEDIA_OC12C:
493 traffic.forward.PCR_all_traffic = ATM_PCR_OC12C;
494 traffic.backward.PCR_all_traffic = ATM_PCR_OC12C;
495 break;
496 case MEDIA_UNKNOWN:
497 break;
498 }
499
500 if (setsockopt(sd, T_ATM_SIGNALING, T_ATM_TRAFFIC,
501 (caddr_t)&traffic, sizeof(traffic)) < 0) {
502 rc = EOPNOTSUPP;
503 goto listen_fail;
504 }
505
506 /*
507 * Set bearer capability options
508 */
509 if (setsockopt(sd, T_ATM_SIGNALING, T_ATM_BEARER_CAP,
510 (caddr_t)&bearer, sizeof(bearer)) < 0) {
511 rc = EOPNOTSUPP;
512 goto listen_fail;
513 }
514
515 /*
516 * Set QOS options
517 */
518 if (setsockopt(sd, T_ATM_SIGNALING, T_ATM_QOS,
519 (caddr_t)&qos, sizeof(qos)) < 0) {
520 rc = EOPNOTSUPP;
521 goto listen_fail;
522 }
523
524 /*
525 * Set LLC identifier
526 */
527 if (setsockopt(sd, T_ATM_SIGNALING, T_ATM_LLC,
528 (caddr_t)&llc_scsp, sizeof(llc_scsp)) < 0) {
529 rc = EOPNOTSUPP;
530 goto listen_fail;
531 }
532
533 /*
534 * Set application name
535 */
536 if (setsockopt(sd, T_ATM_SIGNALING, T_ATM_APP_NAME,
537 (caddr_t)&appname, sizeof(appname)) < 0) {
538 rc = EOPNOTSUPP;
539 goto listen_fail;
540 }
541
542 /*
543 * Listen for new connections
544 */
545 if (listen(sd, 5) < 0) {
546 rc = errno;
547 goto listen_fail;
548 }
549
550 ssp->ss_dcs_lsock = sd;
551 return(sd);
552
553 listen_fail:
554 /*
555 * Close the socket if anything didn't work
556 */
557 close(sd);
558 if (rc == 0)
559 errno = EFAULT;
560 else
561 errno = rc;
562 ssp->ss_dcs_lsock = -1;
563 return(-1);
564 }
565
566
567 /*
568 * Accept a connection from a DCS
569 *
570 * Arguments:
571 * ssp pointer to server block
572 *
573 * Returns:
574 * address of DCS with new connection
575 * 0 failure (errno has reason)
576 *
577 */
578 Scsp_dcs *
579 scsp_dcs_accept(Scsp_server *ssp)
580 {
581 int len, rc, sd;
582 struct sockaddr_atm dcs_sockaddr;
583 struct t_atm_sap_addr *dcs_addr = &dcs_sockaddr.satm_addr.t_atm_sap_addr;
584 Atm_addr dcs_atmaddr;
585 Scsp_dcs *dcsp;
586
587 /*
588 * Accept the new connection
589 */
590 len = sizeof(dcs_sockaddr);
591 sd = accept(ssp->ss_dcs_lsock,
592 (struct sockaddr *)&dcs_sockaddr, &len);
593 if (sd < 0) {
594 return(NULL);
595 }
596 if (sd > scsp_max_socket) {
597 scsp_max_socket = sd;
598 }
599
600 /*
601 * Copy the DCS's address from the sockaddr to an Atm_addr
602 */
603 if (dcs_addr->SVE_tag_addr != T_ATM_PRESENT) {
604 dcs_atmaddr.address_format = T_ATM_ABSENT;
605 dcs_atmaddr.address_length = 0;
606 } else {
607 dcs_atmaddr.address_format = dcs_addr->address_format;
608 dcs_atmaddr.address_length = dcs_addr->address_length;
609 UM_COPY(dcs_addr->address, dcs_atmaddr.address,
610 dcs_addr->address_length);
611 }
612
613 /*
614 * Find out which DCS this connection is for
615 */
616 for (dcsp = ssp->ss_dcs; dcsp; dcsp = dcsp->sd_next) {
617 /*
618 * Compare DCS's address to address
619 * configured by user
620 */
621 if (ATM_ADDR_EQUAL(&dcsp->sd_addr,
622 &dcs_atmaddr))
623 break;
624 }
625
626 /*
627 * Make sure we have this DCS configured
628 */
629 if (!dcsp) {
630 errno = EINVAL;
631 goto dcs_accept_fail;
632 }
633
634 /*
635 * Make sure we are in a state to accept the connection
636 */
637 if (ssp->ss_state != SCSP_SS_ACTIVE) {
638 errno = EACCES;
639 goto dcs_accept_fail;
640 }
641
642 /*
643 * Make sure we don't already have a connection to this DCS
644 */
645 if (dcsp->sd_sock != -1) {
646 errno = EALREADY;
647 goto dcs_accept_fail;
648 }
649
650 /*
651 * Set application name
652 */
653 if (setsockopt(sd, T_ATM_SIGNALING, T_ATM_APP_NAME,
654 (caddr_t)&appname, sizeof(appname)) < 0) {
655 rc = EOPNOTSUPP;
656 goto dcs_accept_fail;
657 }
658
659 /*
660 * Set non-blocking I/O
661 */
662 #ifdef sun
663 rc = fcntl(sd, F_SETFL, FNBIO + FNDELAY);
664 #else
665 rc = fcntl(sd, F_SETFL, O_NONBLOCK);
666 #endif
667 if (rc == -1) {
668 goto dcs_accept_fail;
669 }
670
671 /*
672 * Cancel the open retry timer
673 */
674 HARP_CANCEL(&dcsp->sd_open_t);
675
676 /*
677 * Save the socket address and return the
678 * address of the DCS
679 */
680 dcsp->sd_sock = sd;
681 return(dcsp);
682
683 dcs_accept_fail:
684 /*
685 * An error has occured--clean up and return
686 */
687 close(sd);
688 return(NULL);
689 }
690
691
692 /*
693 * Read an SCSP message from a directly connected server
694 *
695 * Arguments:
696 * dcsp pointer to DCS block that has data
697 *
698 * Returns:
699 * 0 success
700 * else errno indicating reason for failure
701 *
702 */
703 int
704 scsp_dcs_read(Scsp_dcs *dcsp)
705 {
706 int len, rc;
707 char *buff = NULL;
708 Scsp_server *ssp = dcsp->sd_server;
709 Scsp_msg *msg;
710
711 /*
712 * Get a buffer to hold the entire message
713 */
714 len = ssp->ss_mtu;
715 buff = (char *)UM_ALLOC(len);
716 if (!buff) {
717 scsp_mem_err("scsp_dcs_read: ssp->ss_mtu");
718 }
719
720 /*
721 * Read the message
722 */
723 len = read(dcsp->sd_sock, buff, len);
724 if (len < 0) {
725 goto dcs_read_fail;
726 }
727
728 /*
729 * Parse the input message and pass it to the Hello FSM
730 */
731 msg = scsp_parse_msg(buff, len);
732 if (msg) {
733 /*
734 * Write the message to the trace file if
735 * it's of a type we're tracing
736 */
737 if (((scsp_trace_mode & SCSP_TRACE_HELLO_MSG) &&
738 msg->sc_msg_type == SCSP_HELLO_MSG) ||
739 ((scsp_trace_mode & SCSP_TRACE_CA_MSG) &&
740 msg->sc_msg_type != SCSP_HELLO_MSG)) {
741 scsp_trace_msg(dcsp, msg, 1);
742 scsp_trace("\n");
743 }
744
745 /*
746 * Pass the message to the Hello FSM
747 */
748 rc = scsp_hfsm(dcsp, SCSP_HFSM_RCVD, msg);
749 scsp_free_msg(msg);
750 } else {
751 /*
752 * Message was invalid. Write it to the trace file
753 * if we're tracing messages.
754 */
755 if (scsp_trace_mode & (SCSP_TRACE_HELLO_MSG &
756 SCSP_TRACE_CA_MSG)) {
757 int i;
758 scsp_trace("Invalid message received:\n");
759 scsp_trace("0x");
760 for (i = 0; i < len; i++) {
761 scsp_trace("%02x ", (u_char)buff[i]);
762 }
763 scsp_trace("\n");
764 }
765 }
766 UM_FREE(buff);
767
768 return(0);
769
770 dcs_read_fail:
771 /*
772 * Error on read--check for special conditions
773 */
774 rc = errno;
775 if (errno == ECONNRESET) {
776 /*
777 * VCC has been closed--pass the event to
778 * the Hello FSM
779 */
780 rc = scsp_hfsm(dcsp, SCSP_HFSM_VC_CLOSED, NULL);
781 }
782 if (errno == ECONNREFUSED) {
783 /*
784 * VCC open failed--set a timer and try
785 * again when it fires
786 */
787 HARP_TIMER(&dcsp->sd_open_t,
788 SCSP_Open_Interval,
789 scsp_open_timeout);
790 rc = 0;
791 }
792
793 if (buff)
794 UM_FREE(buff);
795 return(rc);
796 }
797
798
799 /*
800 * Listen for Unix connections from SCSP client servers
801 *
802 * Arguments:
803 * None
804 *
805 * Returns:
806 * sock socket which is listening
807 * -1 error (reason in errno)
808 *
809 */
810 int
811 scsp_server_listen(void)
812 {
813 int rc, sd;
814
815 static struct sockaddr scsp_addr = {
816 #if (defined(BSD) && (BSD >= 199103))
817 sizeof(struct sockaddr), /* sa_len */
818 #endif
819 AF_UNIX, /* sa_family */
820 SCSPD_SOCK_NAME /* sa_data */
821 };
822
823 /*
824 * Unlink any old socket
825 */
826 rc = unlink(SCSPD_SOCK_NAME);
827 if (rc < 0 && errno != ENOENT)
828 return(-1);
829
830 /*
831 * Open a socket
832 */
833 sd = socket(PF_UNIX, SOCK_STREAM, 0);
834 if (sd == -1) {
835 return(-1);
836 }
837 if (sd > scsp_max_socket) {
838 scsp_max_socket = sd;
839 }
840
841 /*
842 * Bind the socket's address
843 */
844 rc = bind(sd, &scsp_addr, sizeof(scsp_addr));
845 if (rc == -1) {
846 close(sd);
847 return(-1);
848 }
849
850 /*
851 * Set non-blocking I/O
852 */
853 #ifdef sun
854 rc = fcntl(sd, F_SETFL, FNBIO + FNDELAY);
855 #else
856 rc = fcntl(sd, F_SETFL, O_NONBLOCK);
857 #endif
858 if (rc == -1) {
859 close(sd);
860 return(-1);
861 }
862
863 /*
864 * Listen for new connections
865 */
866 if (listen(sd, 5) < 0) {
867 close(sd);
868 return(-1);
869 }
870
871 return(sd);
872 }
873
874
875 /*
876 * Accept a connection from a server
877 *
878 * We accept a connection, but we won't know which server it is
879 * from until we get the configuration data from the server. We
880 * put the connection on a 'pending' queue and will assign it to
881 * a server when the config data arrives.
882 *
883 * Arguments:
884 * ls listening socket to accept from
885 *
886 * Returns:
887 * 0 success
888 * errno reason for failure
889 *
890 */
891 int
892 scsp_server_accept(int ls)
893 {
894 int len, rc, sd;
895 struct sockaddr server_addr;
896 Scsp_pending *psp;
897
898 /*
899 * Accept the new connection
900 */
901 len = sizeof(server_addr);
902 sd = accept(ls, (struct sockaddr *)&server_addr, &len);
903 if (sd < 0) {
904 return(errno);
905 }
906 if (sd > scsp_max_socket) {
907 scsp_max_socket = sd;
908 }
909
910 /*
911 * Set non-blocking operation
912 */
913 #ifdef sun
914 rc = fcntl(sd, F_SETFL, FNBIO + FNDELAY);
915 #else
916 rc = fcntl(sd, F_SETFL, O_NONBLOCK);
917 #endif
918 if (rc == -1) {
919 close(sd);
920 rc = errno;
921 }
922
923 /*
924 * Put the new socket on the 'pending' queue
925 */
926 psp = (Scsp_pending *) UM_ALLOC(sizeof(Scsp_pending));
927 if (!psp) {
928 scsp_mem_err("scsp_server_accept: sizeof(Scsp_pending)");
929 }
930 psp->sp_sock = sd;
931 LINK2TAIL(psp, Scsp_pending, scsp_pending_head, sp_next);
932
933 return(0);
934 }
935
936
937 /*
938 * Read a server interface message from a socket
939 *
940 * Arguments:
941 * sd socket to read from
942 *
943 * Returns:
944 * msg pointer to message read
945 * 0 failure (errno has reason)
946 *
947 */
948 Scsp_if_msg *
949 scsp_if_sock_read(int sd)
950 {
951 int len;
952 char *buff = NULL;
953 Scsp_if_msg *msg;
954 Scsp_if_msg_hdr msg_hdr;
955
956 /*
957 * Read the message header from the socket
958 */
959 len = read(sd, (char *)&msg_hdr, sizeof(msg_hdr));
960 if (len != sizeof(msg_hdr)) {
961 if (len >= 0)
962 errno = EINVAL;
963 goto socket_read_fail;
964 }
965
966 /*
967 * Get a buffer and read the rest of the message into it
968 */
969 buff = (char *)UM_ALLOC(msg_hdr.sh_len);
970 if (!buff) {
971 scsp_mem_err("scsp_if_sock_read: msg_hdr.sh_len");
972 }
973 msg = (Scsp_if_msg *)buff;
974 msg->si_hdr = msg_hdr;
975 len = read(sd, &buff[sizeof(Scsp_if_msg_hdr)],
976 msg->si_len - sizeof(Scsp_if_msg_hdr));
977 if (len != msg->si_len - sizeof(Scsp_if_msg_hdr)) {
978 if (len >= 0) {
979 errno = EINVAL;
980 }
981 goto socket_read_fail;
982 }
983
984 /*
985 * Trace the message
986 */
987 if (scsp_trace_mode & SCSP_TRACE_IF_MSG) {
988 scsp_trace("Received server I/F message:\n");
989 print_scsp_if_msg(scsp_trace_file, msg);
990 scsp_trace("\n");
991 }
992
993 return(msg);
994
995 socket_read_fail:
996 if (buff)
997 UM_FREE(buff);
998 return(NULL);
999 }
1000
1001
1002 /*
1003 * Write a server interface message to a socket
1004 *
1005 * Arguments:
1006 * sd socket to write to
1007 * msg pointer to message to write
1008 *
1009 * Returns:
1010 * 0 success
1011 * errno reason for failure
1012 *
1013 */
1014 int
1015 scsp_if_sock_write(int sd, Scsp_if_msg *msg)
1016 {
1017 int len, rc;
1018
1019 /*
1020 * Trace the message
1021 */
1022 if (scsp_trace_mode & SCSP_TRACE_IF_MSG) {
1023 scsp_trace("Writing server I/F message:\n");
1024 print_scsp_if_msg(scsp_trace_file, msg);
1025 scsp_trace("\n");
1026 }
1027
1028 /*
1029 * Write the message to the indicated socket
1030 */
1031 len = write(sd, (char *)msg, msg->si_len);
1032 if (len != msg->si_len) {
1033 if (len < 0)
1034 rc = errno;
1035 else
1036 rc = EINVAL;
1037 } else {
1038 rc = 0;
1039 }
1040
1041 return(rc);
1042 }
1043
1044
1045 /*
1046 * Read data from a local server
1047 *
1048 * Arguments:
1049 * ssp pointer to server block that has data
1050 *
1051 * Returns:
1052 * 0 success
1053 * else errno indicating reason for failure
1054 *
1055 */
1056 int
1057 scsp_server_read(Scsp_server *ssp)
1058 {
1059 int rc;
1060 Scsp_dcs *dcsp;
1061 Scsp_if_msg *msg;
1062
1063 /*
1064 * Read the message
1065 */
1066 msg = scsp_if_sock_read(ssp->ss_sock);
1067 if (!msg) {
1068 if (errno == EWOULDBLOCK) {
1069 /*
1070 * Nothing to read--just return
1071 */
1072 return(0);
1073 } else {
1074 /*
1075 * Error--shut down the server entry
1076 */
1077 scsp_server_shutdown(ssp);
1078 }
1079 return(errno);
1080 }
1081
1082 /*
1083 * Process the received message
1084 */
1085 switch(msg->si_type) {
1086 case SCSP_NOP_REQ:
1087 /*
1088 * Ignore a NOP
1089 */
1090 break;
1091 case SCSP_CACHE_RSP:
1092 /*
1093 * Summarize the server's cache and try to open
1094 * connections to all of its DCSs
1095 */
1096 scsp_process_cache_rsp(ssp, msg);
1097 ssp->ss_state = SCSP_SS_ACTIVE;
1098 for (dcsp = ssp->ss_dcs; dcsp; dcsp = dcsp->sd_next) {
1099 if (scsp_dcs_connect(dcsp)) {
1100 /*
1101 * Connect failed -- the DCS may not
1102 * be up yet, so we'll try again later
1103 */
1104 HARP_TIMER(&dcsp->sd_open_t,
1105 SCSP_Open_Interval,
1106 scsp_open_timeout);
1107 }
1108 }
1109 ssp->ss_state = SCSP_SS_ACTIVE;
1110 break;
1111 case SCSP_SOLICIT_RSP:
1112 /*
1113 * The server has answered our request for a particular
1114 * entry from its cache
1115 */
1116 dcsp = (Scsp_dcs *)msg->si_tok;
1117 rc = scsp_cfsm(dcsp, SCSP_CIFSM_SOL_RSP, NULL, msg);
1118 break;
1119 case SCSP_UPDATE_REQ:
1120 /*
1121 * Pass the update request to the FSMs for all
1122 * DCSs associated with the server
1123 */
1124 if (ssp->ss_state == SCSP_SS_ACTIVE) {
1125 for (dcsp = ssp->ss_dcs; dcsp;
1126 dcsp = dcsp->sd_next) {
1127 rc = scsp_cfsm(dcsp, SCSP_CIFSM_UPD_REQ,
1128 NULL, msg);
1129 }
1130 }
1131 break;
1132 case SCSP_UPDATE_RSP:
1133 /*
1134 * Pass the update response to the FSM for the
1135 * DCS associated with the request
1136 */
1137 dcsp = (Scsp_dcs *)msg->si_tok;
1138 rc = scsp_cfsm(dcsp, SCSP_CIFSM_UPD_RSP, NULL, msg);
1139 break;
1140 default:
1141 scsp_log(LOG_ERR, "invalid message type %d from server",
1142 msg->si_type);
1143 return(EINVAL);
1144 }
1145
1146 UM_FREE(msg);
1147 return(0);
1148 }
1149
1150
1151 /*
1152 * Send a Cache Indication to a server
1153 *
1154 * Arguments:
1155 * ssp pointer to server block block
1156 *
1157 * Returns:
1158 * 0 success
1159 * else errno indicating reason for failure
1160 *
1161 */
1162 int
1163 scsp_send_cache_ind(Scsp_server *ssp)
1164 {
1165 int rc;
1166 Scsp_if_msg *msg;
1167
1168 /*
1169 * Get storage for a server interface message
1170 */
1171 msg = (Scsp_if_msg *)UM_ALLOC(sizeof(Scsp_if_msg));
1172 if (!msg) {
1173 scsp_mem_err("scsp_send_cache_ind: sizeof(Scsp_if_msg)");
1174 }
1175 UM_ZERO(msg, sizeof(Scsp_if_msg));
1176
1177 /*
1178 * Fill out the message
1179 */
1180 msg->si_type = SCSP_CACHE_IND;
1181 msg->si_rc = 0;
1182 msg->si_proto = ssp->ss_pid;
1183 msg->si_len = sizeof(Scsp_if_msg_hdr);
1184 msg->si_tok = (u_long)ssp;
1185
1186 /*
1187 * Send the message
1188 */
1189 rc = scsp_if_sock_write(ssp->ss_sock, msg);
1190 UM_FREE(msg);
1191 return(rc);
1192 }
1193
1194
1195 /*
1196 * Read data from a pending server connection
1197 *
1198 * Arguments:
1199 * psp pointer to pending block that has data
1200 *
1201 * Returns:
1202 * 0 success
1203 * else errno indicating reason for failure
1204 *
1205 */
1206 int
1207 scsp_pending_read(Scsp_pending *psp)
1208 {
1209 int rc;
1210 Scsp_server *ssp;
1211 Scsp_if_msg *msg;
1212
1213 /*
1214 * Read the message from the pending socket
1215 */
1216 msg = scsp_if_sock_read(psp->sp_sock);
1217 if (!msg) {
1218 rc = errno;
1219 goto pending_read_fail;
1220 }
1221
1222 /*
1223 * Make sure this is configuration data
1224 */
1225 if (msg->si_type != SCSP_CFG_REQ) {
1226 scsp_log(LOG_ERR, "invalid message type %d from pending server",
1227 msg->si_type);
1228 rc = EINVAL;
1229 goto pending_read_fail;
1230 }
1231
1232 /*
1233 * Find the server this message is for
1234 */
1235 for (ssp = scsp_server_head; ssp; ssp = ssp->ss_next) {
1236 if (strcmp(ssp->ss_intf, msg->si_cfg.atmarp_netif) == 0)
1237 break;
1238 }
1239 if (!ssp) {
1240 scsp_log(LOG_ERR, "refused connection from server for %s",
1241 msg->si_cfg.atmarp_netif);
1242 rc = EINVAL;
1243 goto config_reject;
1244 }
1245
1246 /*
1247 * Make sure the server is ready to go
1248 */
1249 rc = scsp_get_server_info(ssp);
1250 if (rc) {
1251 goto config_reject;
1252 }
1253
1254 /*
1255 * Save the socket
1256 */
1257 ssp->ss_sock = psp->sp_sock;
1258 ssp->ss_state = SCSP_SS_CFG;
1259 UNLINK(psp, Scsp_pending, scsp_pending_head, sp_next);
1260 UM_FREE(psp);
1261
1262 /*
1263 * Listen for connections from the server's DCSs
1264 */
1265 rc = scsp_dcs_listen(ssp);
1266 if (rc < 0) {
1267 rc = errno;
1268 goto config_reject;
1269 }
1270
1271 /*
1272 * Respond to the configuration message
1273 */
1274 msg->si_type = SCSP_CFG_RSP;
1275 msg->si_rc = SCSP_RSP_OK;
1276 msg->si_len = sizeof(Scsp_if_msg_hdr);
1277 rc = scsp_if_sock_write(ssp->ss_sock, msg);
1278 if (rc) {
1279 goto config_error;
1280 }
1281
1282 /*
1283 * Ask the server to send us its cache
1284 */
1285 rc = scsp_send_cache_ind(ssp);
1286 if (rc) {
1287 goto config_error;
1288 }
1289
1290 UM_FREE(msg);
1291 return(0);
1292
1293 config_reject:
1294 /*
1295 * Respond to the configuration message
1296 */
1297 msg->si_type = SCSP_CFG_RSP;
1298 msg->si_rc = SCSP_RSP_REJ;
1299 msg->si_len = sizeof(Scsp_if_msg_hdr);
1300 scsp_if_sock_write(ssp->ss_sock, msg);
1301
1302 config_error:
1303 if (ssp->ss_sock != -1) {
1304 close(ssp->ss_sock);
1305 ssp->ss_sock = -1;
1306 }
1307 if (ssp->ss_dcs_lsock != -1) {
1308 close(ssp->ss_dcs_lsock);
1309 ssp->ss_sock = -1;
1310 }
1311 ssp->ss_state = SCSP_SS_NULL;
1312 UM_FREE(msg);
1313
1314 return(rc);
1315
1316 pending_read_fail:
1317 /*
1318 * Close the socket and free the pending read block
1319 */
1320 close(psp->sp_sock);
1321 UNLINK(psp, Scsp_pending, scsp_pending_head, sp_next);
1322 UM_FREE(psp);
1323 if (msg)
1324 UM_FREE(msg);
1325 return(rc);
1326 }
DragonFly BSD