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 1.5 2007/11/25 01:28:23 swildner 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>
62 #include "../scspd/scsp_msg.h"
63 #include "../scspd/scsp_if.h"
64 #include "../scspd/scsp_var.h"
65 #include "atmarp_var.h"
71 int atmarp_debug_mode = 0;
72 int atmarp_max_socket = 0;
73 Atmarp_intf *atmarp_intf_head = NULL;
74 Atmarp_slis *atmarp_slis_head = NULL;
75 FILE *atmarp_log_file = NULL;
76 char *atmarp_log_file_name = NULL;
77 Harp_timer cache_timer, perm_timer;
81 * Print a usage message
87 * exits, does not return
93 fprintf(stderr, "usage: %s [-d] [-l <log_file>] <net_intf> ...\n", prog);
99 * Process command line parameters
102 * argc number of command-line arguments
103 * argv list of pointers to command-line arguments
110 initialize(int argc, char **argv)
116 * Save program name, ignoring any path components
118 if ((prog = (char *)strrchr(argv[0], '/')) != NULL)
124 * Make sure we're being invoked by the super user
128 fprintf(stderr, "%s: You must be root to run this program\n",
134 * Scan arguments, checking for options
136 for (i = 1; i < argc; i++) {
137 if (argv[i][0] == '-') {
138 if (strcmp(argv[i], "-d") == 0) {
139 atmarp_debug_mode = TRUE;
140 } else if (strcmp(argv[i], "-l") == 0) {
143 fprintf(stderr, "%s: Log file name missing\n",
147 atmarp_log_file_name = argv[i];
149 fprintf(stderr, "%s: Unrecognized option \"%s\"\n",
155 * Parameter is a network interface name
157 rc = atmarp_cfg_netif(argv[i]);
159 fprintf(stderr, "%s: Error configuring network interface %s\n",
167 * Make sure we had at least one interface configured
169 if (!atmarp_intf_head) {
176 * Daemon housekeeping
188 int dpid, fd, file_count, rc;
191 * Ignore selected signals
194 signal(SIGTTOU, SIG_IGN);
197 signal(SIGTTIN, SIG_IGN);
200 signal(SIGTSTP, SIG_IGN);
203 signal(SIGPIPE, SIG_IGN);
207 * Skip putting things into the background if we're
210 if (atmarp_debug_mode)
214 * Set up syslog for error logging
216 if (!atmarp_log_file) {
217 openlog(prog, LOG_PID | LOG_CONS, LOG_DAEMON);
221 * Put the daemon into the background
225 atmarp_log(LOG_ERR, "fork failed");
230 * This is the parent process--just exit and let
231 * the daughter do all the work
237 * Disassociate from any controlling terminal
239 rc = setpgrp(0, getpid());
241 atmarp_log(LOG_ERR, "can't change process group");
244 fd = open(_PATH_TTY, O_RDWR);
246 ioctl(fd, TIOCNOTTY, NULL);
251 * Close all open file descriptors
253 file_count = getdtablesize();
254 for (fd=0; fd<file_count; fd++) {
259 * Open log file, if specified
261 if (atmarp_log_file_name) {
262 atmarp_log_file = fopen(atmarp_log_file_name, "a");
263 if (!atmarp_log_file) {
264 atmarp_log(LOG_ERR, "%s: Can't open log file \'%s\'\n",
265 prog, atmarp_log_file_name);
271 * Set up and start interval timer
277 * Move to a safe directory
282 * Clear the file mode creation mask
288 * Set up signal handlers
290 rc = (int)signal(SIGINT, atmarp_sigint);
292 atmarp_log(LOG_ERR, "SIGINT signal setup failed");
301 * The ATMARP server resides in the kernel, while SCSP runs as a daemon
302 * in user space. This program exists to provide an interface between
303 * the two. It periodically polls the kernel to get the ATMARP cache
304 * and passes information about new entries to SCSP. It also accepts
305 * new information from SCSP and passes it to the kernel.
308 * argc number of command-line arguments
309 * argv list of pointers to command-line arguments
316 main(int argc, char **argv)
319 fd_set read_set, write_set, except_set;
323 * Process command line arguments
325 initialize(argc, argv);
328 * Put the daemon into the background
333 * Start the cache update timer
335 HARP_TIMER(&cache_timer, ATMARP_CACHE_INTERVAL,
336 atmarp_cache_timeout);
339 * Start the permanent cache entry timer
341 HARP_TIMER(&perm_timer, ATMARP_PERM_INTERVAL,
342 atmarp_perm_timeout);
345 * Establish a connection to SCSP for each interface. If a
346 * connect fails, it will be retried when the cache update
349 for (aip = atmarp_intf_head; aip; aip = aip->ai_next) {
350 if (atmarp_if_ready(aip)) {
351 atmarp_scsp_connect(aip);
356 * Read the cache from the kernel
358 atmarp_get_updated_cache();
361 * Main program loop -- wait for data to come in from SCSP.
362 * When the timer fires, it will be handled elsewhere.
366 * Wait for input from SCSP
370 FD_ZERO(&except_set);
371 for (aip = atmarp_intf_head; aip; aip = aip->ai_next) {
372 if (aip->ai_scsp_sock != -1) {
373 FD_SET(aip->ai_scsp_sock, &read_set);
376 rc = select(atmarp_max_socket + 1,
377 &read_set, &write_set,
380 if (harp_timer_exec) {
383 } else if (errno == EINTR) {
386 atmarp_log(LOG_ERR, "Select failed");
392 * Read and process the input from SCSP
394 for (i = 0; i <= atmarp_max_socket; i++) {
395 if (FD_ISSET(i, &read_set)) {
396 aip = atmarp_find_intf_sock(i);
398 rc = atmarp_scsp_read(aip);