3 * ===================================
4 * HARP | Host ATM Research Platform
5 * ===================================
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.
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.
21 * Copyright 1994-1998 Network Computing Services, Inc.
23 * Copies of this Software may be made, however, the above copyright
24 * notice must be reproduced on all copies.
26 * @(#) $FreeBSD: src/usr.sbin/atm/scspd/scspd.c,v 1.3.2.1 2000/12/11 01:03:29 obrien Exp $
27 * @(#) $DragonFly: src/usr.sbin/atm/scspd/scspd.c,v 1.2 2003/06/17 04:29:52 dillon Exp $
32 * Server Cache Synchronization Protocol (SCSP) Support
33 * ----------------------------------------------------
35 * SCSP server daemon main line code
39 #include <sys/types.h>
40 #include <sys/param.h>
41 #include <sys/socket.h>
43 #include <sys/ttycom.h>
45 #include <netinet/in.h>
46 #include <netatm/queue.h>
47 #include <netatm/atm.h>
48 #include <netatm/atm_if.h>
49 #include <netatm/atm_sap.h>
50 #include <netatm/atm_sys.h>
51 #include <netatm/atm_ioctl.h>
70 char *scsp_config_file = SCSPD_CONFIG;
71 FILE *scsp_log_file = (FILE *)0;
72 int scsp_log_syslog = 0;
73 Scsp_server *scsp_server_head = (Scsp_server *)0;
74 Scsp_pending *scsp_pending_head = (Scsp_pending *)0;
75 int scsp_max_socket = -1;
76 int scsp_debug_mode = 0;
77 int scsp_trace_mode = 0;
83 static int scsp_hup_signal = 0;
84 static int scsp_int_signal = 0;
88 * SIGHUP signal handler
109 * SIGINT signal handler
130 * Process command line parameters
133 * argc number of command-line arguments
134 * argv list of pointers to command-line arguments
141 initialize(argc, argv)
149 * Save program name, ignoring any path components
151 if ((prog = (char *)strrchr(argv[0], '/')) != NULL)
157 * Make sure we're being invoked by the super user
161 fprintf(stderr, "%s: You must be root to run this program\n",
167 * Check for command-line options
169 for (i = 1; i < argc; i++) {
170 if (strcmp(argv[i], "-d") == 0) {
172 * -d option -- set debug mode
175 } else if (strcmp(argv[i], "-f") == 0) {
177 * -f option -- set config file name
181 fprintf(stderr, "%s: Configuration file name missing\n",
185 scsp_config_file = argv[i];
186 } else if (strncmp(argv[i], "-T", 2) == 0) {
188 * -T option -- trace options
190 for (cp = &argv[i][2]; *cp; cp++) {
192 scsp_trace_mode |= SCSP_TRACE_CAFSM;
194 scsp_trace_mode |= SCSP_TRACE_HFSM;
196 scsp_trace_mode |= SCSP_TRACE_CFSM;
198 scsp_trace_mode |= SCSP_TRACE_CA_MSG;
200 scsp_trace_mode |= SCSP_TRACE_HELLO_MSG;
202 scsp_trace_mode |= SCSP_TRACE_IF_MSG;
204 fprintf(stderr, "Invalid trace specification '%c' ignored\n",
209 * Error -- unrecognized option
211 fprintf(stderr, "%s: Unrecognized option \"%s\"\n",
220 * Daemon housekeeping
233 int dpid, fd, file_count, rc;
236 * Ignore selected signals
239 signal(SIGTTOU, SIG_IGN);
242 signal(SIGTTIN, SIG_IGN);
245 signal(SIGTSTP, SIG_IGN);
248 signal(SIGPIPE, SIG_IGN);
253 * Don't put the daemon into the background if
254 * we're in debug mode
260 * Put the daemon into the background
264 scsp_log(LOG_ERR, "fork failed");
269 * This is the parent process--just exit and let
270 * the daughter do all the work
276 * Disassociate from any controlling terminal
278 rc = setpgrp(0, getpid());
280 scsp_log(LOG_ERR, "can't change process group");
283 fd = open(_PATH_TTY, O_RDWR);
285 ioctl(fd, TIOCNOTTY, (char *)0);
290 * Close all open file descriptors
292 file_count = getdtablesize();
293 for (fd=0; fd<file_count; fd++) {
304 * Move to a safe directory
309 * Clear the file mode creation mask
315 * Set up signal handlers
317 rc = (int)signal(SIGHUP, scsp_sighup);
319 scsp_log(LOG_ERR, "SIGHUP signal setup failed");
323 rc = (int)signal(SIGINT, scsp_sigint);
325 scsp_log(LOG_ERR, "SIGINT signal setup failed");
330 * Set up syslog for error logging
332 if (scsp_log_syslog || !scsp_log_file) {
333 openlog(prog, LOG_PID | LOG_CONS, LOG_DAEMON);
335 scsp_log(LOG_INFO, "Starting SCSP daemon");
342 * Process command line parameters, read configuration file, connect
343 * to configured clients, process data from DCSs.
346 * argc number of command-line arguments
347 * argv list of pointers to command-line arguments
359 int i, rc, scsp_server_lsock;
362 Scsp_pending *next_psp, *psp;
363 fd_set read_set, write_set, except_set;
366 * Process command line arguments
368 initialize(argc, argv);
371 * Put the daemon into the background
376 * Process configuration file
378 rc = scsp_config(scsp_config_file);
380 scsp_log(LOG_ERR, "Found %d error%s in configuration file",
381 rc, ((rc == 1) ? "" : "s"));
386 * Open the trace file if we need one
388 if (scsp_trace_mode) {
393 * Listen for connections from clients
395 scsp_server_lsock = scsp_server_listen();
396 if (scsp_server_lsock == -1) {
397 scsp_log(LOG_ERR, "server listen failed");
402 * Main program loop -- we wait for:
403 * a server listen to complete
404 * a DCS listen to complete
405 * a DCS connect to complete
411 * Set up the file descriptor sets and select to wait
416 FD_ZERO(&except_set);
417 FD_SET(scsp_server_lsock, &read_set);
418 for (ssp = scsp_server_head; ssp; ssp = ssp->ss_next) {
419 if (ssp->ss_dcs_lsock != -1)
420 FD_SET(ssp->ss_dcs_lsock, &read_set);
421 if (ssp->ss_sock != -1)
422 FD_SET(ssp->ss_sock, &read_set);
423 for (dcsp = ssp->ss_dcs; dcsp;
424 dcsp = dcsp->sd_next) {
425 if (dcsp->sd_sock != -1) {
426 if (dcsp->sd_hello_state ==
428 FD_SET(dcsp->sd_sock,
431 FD_SET(dcsp->sd_sock,
436 for (psp = scsp_pending_head; psp; psp = psp->sp_next) {
437 FD_SET(psp->sp_sock, &read_set);
439 rc = select(scsp_max_socket + 1, &read_set,
440 &write_set, &except_set,
441 (struct timeval *)0);
444 * Select error--check for possible signals
446 if (harp_timer_exec) {
448 * Timer tick--process it
452 } else if (scsp_hup_signal) {
454 * SIGHUP signal--reconfigure
459 } else if (scsp_int_signal) {
461 * SIGINT signal--dump control blocks
466 } else if (errno == EINTR) {
468 * EINTR--just ignore it
473 * Other error--this is a problem
475 scsp_log(LOG_ERR, "Select failed");
481 * Check the read set for connections from servers
483 if (FD_ISSET(scsp_server_lsock, &read_set)) {
484 FD_CLR(scsp_server_lsock, &read_set);
485 rc = scsp_server_accept(scsp_server_lsock);
489 * Check the write set for new connections to DCSs
491 for (i = 0; i <= scsp_max_socket; i++) {
492 if (FD_ISSET(i, &write_set)) {
493 FD_CLR(i, &write_set);
494 if ((dcsp = scsp_find_dcs(i)) != NULL) {
503 * Check the read set for connections from DCSs
505 for (ssp = scsp_server_head; ssp; ssp = ssp->ss_next) {
506 if (ssp->ss_dcs_lsock != -1 &&
507 FD_ISSET(ssp->ss_dcs_lsock,
509 FD_CLR(ssp->ss_dcs_lsock, &read_set);
510 dcsp = scsp_dcs_accept(ssp);
520 * Check the read set for data from pending servers
522 for (psp = scsp_pending_head; psp; psp = next_psp) {
523 next_psp = psp->sp_next;
524 if (FD_ISSET(psp->sp_sock, &read_set)) {
525 FD_CLR(psp->sp_sock, &read_set);
526 rc = scsp_pending_read(psp);
531 * Check the read set for data from servers or DCSs
533 for (i = 0; i <= scsp_max_socket; i++) {
534 if (FD_ISSET(i, &read_set)) {
535 if ((ssp = scsp_find_server(i)) != NULL) {
536 rc = scsp_server_read(ssp);
537 } else if ((dcsp = scsp_find_dcs(i)) != NULL) {
538 rc = scsp_dcs_read(dcsp);