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/atmarpd/atmarpd.c,v 1.3.2.1 2000/12/11 01:03:29 obrien Exp $
27 * @(#) $DragonFly: src/usr.sbin/atm/atmarpd/atmarpd.c,v 1.2 2003/06/17 04:29:52 dillon Exp $
31 * Server Cache Synchronization Protocol (SCSP) Support
32 * ----------------------------------------------------
34 * SCSP-ATMARP server interface: main line code
38 #include <sys/types.h>
39 #include <sys/param.h>
40 #include <sys/socket.h>
42 #include <sys/ttycom.h>
44 #include <netinet/in.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>
61 #include "../scspd/scsp_msg.h"
62 #include "../scspd/scsp_if.h"
63 #include "../scspd/scsp_var.h"
64 #include "atmarp_var.h"
70 int atmarp_debug_mode = 0;
71 int atmarp_max_socket = 0;
72 Atmarp_intf *atmarp_intf_head = (Atmarp_intf *)0;
73 Atmarp_slis *atmarp_slis_head = (Atmarp_slis *)0;
74 FILE *atmarp_log_file = (FILE *)0;
75 char *atmarp_log_file_name = (char *)0;
76 Harp_timer cache_timer, perm_timer;
80 * Print a usage message
86 * exits, does not return
92 fprintf(stderr, "usage: %s [-d] [-l <log_file>] <net_intf> ...\n", prog);
98 * Process command line parameters
101 * argc number of command-line arguments
102 * argv list of pointers to command-line arguments
109 initialize(argc, argv)
117 * Save program name, ignoring any path components
119 if ((prog = (char *)strrchr(argv[0], '/')) != NULL)
125 * Make sure we're being invoked by the super user
129 fprintf(stderr, "%s: You must be root to run this program\n",
135 * Scan arguments, checking for options
137 for (i = 1; i < argc; i++) {
138 if (argv[i][0] == '-') {
139 if (strcmp(argv[i], "-d") == 0) {
140 atmarp_debug_mode = TRUE;
141 } else if (strcmp(argv[i], "-l") == 0) {
144 fprintf(stderr, "%s: Log file name missing\n",
148 atmarp_log_file_name = argv[i];
150 fprintf(stderr, "%s: Unrecognized option \"%s\"\n",
156 * Parameter is a network interface name
158 rc = atmarp_cfg_netif(argv[i]);
160 fprintf(stderr, "%s: Error configuring network interface %s\n",
168 * Make sure we had at least one interface configured
170 if (!atmarp_intf_head) {
177 * Daemon housekeeping
190 int dpid, fd, file_count, rc;
193 * Ignore selected signals
196 signal(SIGTTOU, SIG_IGN);
199 signal(SIGTTIN, SIG_IGN);
202 signal(SIGTSTP, SIG_IGN);
205 signal(SIGPIPE, SIG_IGN);
209 * Skip putting things into the background if we're
212 if (atmarp_debug_mode)
216 * Set up syslog for error logging
218 if (!atmarp_log_file) {
219 openlog(prog, LOG_PID | LOG_CONS, LOG_DAEMON);
223 * Put the daemon into the background
227 atmarp_log(LOG_ERR, "fork failed");
232 * This is the parent process--just exit and let
233 * the daughter do all the work
239 * Disassociate from any controlling terminal
241 rc = setpgrp(0, getpid());
243 atmarp_log(LOG_ERR, "can't change process group");
246 fd = open(_PATH_TTY, O_RDWR);
248 ioctl(fd, TIOCNOTTY, (char *)0);
253 * Close all open file descriptors
255 file_count = getdtablesize();
256 for (fd=0; fd<file_count; fd++) {
261 * Open log file, if specified
263 if (atmarp_log_file_name) {
264 atmarp_log_file = fopen(atmarp_log_file_name, "a");
265 if (!atmarp_log_file) {
266 atmarp_log(LOG_ERR, "%s: Can't open log file \'%s\'\n",
267 prog, atmarp_log_file_name);
273 * Set up and start interval timer
279 * Move to a safe directory
284 * Clear the file mode creation mask
290 * Set up signal handlers
292 rc = (int)signal(SIGINT, atmarp_sigint);
294 atmarp_log(LOG_ERR, "SIGINT signal setup failed");
303 * The ATMARP server resides in the kernel, while SCSP runs as a daemon
304 * in user space. This program exists to provide an interface between
305 * the two. It periodically polls the kernel to get the ATMARP cache
306 * and passes information about new entries to SCSP. It also accepts
307 * new information from SCSP and passes it to the kernel.
310 * argc number of command-line arguments
311 * argv list of pointers to command-line arguments
324 fd_set read_set, write_set, except_set;
328 * Process command line arguments
330 initialize(argc, argv);
333 * Put the daemon into the background
338 * Start the cache update timer
340 HARP_TIMER(&cache_timer, ATMARP_CACHE_INTERVAL,
341 atmarp_cache_timeout);
344 * Start the permanent cache entry timer
346 HARP_TIMER(&perm_timer, ATMARP_PERM_INTERVAL,
347 atmarp_perm_timeout);
350 * Establish a connection to SCSP for each interface. If a
351 * connect fails, it will be retried when the cache update
354 for (aip = atmarp_intf_head; aip; aip = aip->ai_next) {
355 if (atmarp_if_ready(aip)) {
356 (void)atmarp_scsp_connect(aip);
361 * Read the cache from the kernel
363 atmarp_get_updated_cache();
366 * Main program loop -- wait for data to come in from SCSP.
367 * When the timer fires, it will be handled elsewhere.
371 * Wait for input from SCSP
375 FD_ZERO(&except_set);
376 for (aip = atmarp_intf_head; aip; aip = aip->ai_next) {
377 if (aip->ai_scsp_sock != -1) {
378 FD_SET(aip->ai_scsp_sock, &read_set);
381 rc = select(atmarp_max_socket + 1,
382 &read_set, &write_set,
383 &except_set, (struct timeval *)0);
385 if (harp_timer_exec) {
388 } else if (errno == EINTR) {
391 atmarp_log(LOG_ERR, "Select failed");
397 * Read and process the input from SCSP
399 for (i = 0; i <= atmarp_max_socket; i++) {
400 if (FD_ISSET(i, &read_set)) {
401 aip = atmarp_find_intf_sock(i);
403 rc = atmarp_scsp_read(aip);