218 lines
3.3 KiB
C
218 lines
3.3 KiB
C
/*
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* BIRD Internet Routing Daemon -- Unix Entry Point
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*
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* (c) 1998--1999 Martin Mares <mj@ucw.cz>
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*
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* Can be freely distributed and used under the terms of the GNU GPL.
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*/
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#include <stdio.h>
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#include <string.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <sys/signal.h>
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#include "nest/bird.h"
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#include "lib/lists.h"
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#include "lib/resource.h"
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#include "lib/socket.h"
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#include "lib/event.h"
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#include "nest/route.h"
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#include "nest/protocol.h"
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#include "nest/iface.h"
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#include "conf/conf.h"
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#include "filter/filter.h"
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#include "unix.h"
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#include "krt.h"
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int shutting_down;
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/*
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* Debugging
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*/
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void
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async_dump(void)
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{
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debug("INTERNAL STATE DUMP\n\n");
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sk_dump_all();
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tm_dump_all();
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if_dump_all();
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neigh_dump_all();
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rta_dump_all();
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rt_dump_all();
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protos_dump_all();
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debug("\n");
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}
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/*
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* Reading the Configuration
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*/
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static int conf_fd;
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static char *config_name = PATH_CONFIG;
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static int
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cf_read(byte *dest, unsigned int len)
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{
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int l = read(conf_fd, dest, len);
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if (l < 0)
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cf_error("Read error");
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return l;
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}
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static void
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read_config(void)
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{
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struct config *conf = config_alloc(config_name);
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conf_fd = open(config_name, O_RDONLY);
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if (conf_fd < 0)
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die("Unable to open configuration file %s: %m", config_name);
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cf_read_hook = cf_read;
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if (!config_parse(conf))
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die("%s, line %d: %s", config_name, conf->err_lino, conf->err_msg);
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config_commit(conf);
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}
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void
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async_config(void)
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{
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debug("Asynchronous reconfigurations are not supported in demo version\n");
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}
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/*
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* Shutdown
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*/
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void
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async_shutdown(void)
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{
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debug("Shutting down...\n");
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shutting_down = 1;
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protos_shutdown();
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}
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void
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protos_shutdown_notify(void)
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{
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die("System shutdown completed");
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}
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/*
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* Signals
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*/
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static void
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handle_sighup(int sig)
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{
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debug("Caught SIGHUP...\n");
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async_config_flag = 1;
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}
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static void
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handle_sigusr(int sig)
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{
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debug("Caught SIGUSR...\n");
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async_dump_flag = 1;
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}
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static void
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handle_sigterm(int sig)
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{
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debug("Caught SIGTERM...\n");
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async_shutdown_flag = 1;
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}
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static void
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signal_init(void)
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{
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struct sigaction sa;
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bzero(&sa, sizeof(sa));
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sa.sa_handler = handle_sigusr;
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sa.sa_flags = SA_RESTART;
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sigaction(SIGUSR1, &sa, NULL);
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sa.sa_handler = handle_sighup;
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sa.sa_flags = SA_RESTART;
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sigaction(SIGHUP, &sa, NULL);
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sa.sa_handler = handle_sigterm;
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sa.sa_flags = SA_RESTART;
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sigaction(SIGTERM, &sa, NULL);
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signal(SIGPIPE, SIG_IGN);
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}
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/*
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* Parsing of command-line arguments
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*/
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static char *opt_list = "c:d:";
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static void
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usage(void)
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{
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fprintf(stderr, "Usage: bird [-c <config-file>] [-d <debug-file>]\n");
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exit(1);
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}
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static void
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parse_args(int argc, char **argv)
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{
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int c;
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while ((c = getopt(argc, argv, opt_list)) >= 0)
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switch (c)
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{
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case 'c':
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config_name = optarg;
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break;
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case 'd':
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log_init_debug(optarg);
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break;
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default:
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usage();
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}
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if (optind < argc)
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usage();
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}
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/*
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* Hic Est main()
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*/
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int
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main(int argc, char **argv)
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{
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log_init_debug(NULL);
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parse_args(argc, argv);
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log(L_INFO "Launching BIRD 0.0.0...");
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debug("Initializing.\n");
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resource_init();
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io_init();
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rt_init();
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if_init();
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protos_build();
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add_tail(&protocol_list, &proto_unix_kernel.n);
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read_config();
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signal_init();
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scan_if_init();
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protos_start();
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ev_run_list(&global_event_list);
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async_dump();
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debug("Entering I/O loop.\n");
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io_loop();
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bug("I/O loop died");
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}
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