1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
|
/*
* BIRD Internet Routing Daemon -- Unix Entry Point
*
* (c) 1998--1999 Martin Mares <mj@ucw.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/signal.h>
#include "nest/bird.h"
#include "lib/lists.h"
#include "lib/resource.h"
#include "lib/socket.h"
#include "lib/event.h"
#include "nest/route.h"
#include "nest/protocol.h"
#include "nest/iface.h"
#include "conf/conf.h"
#include "filter/filter.h"
#include "unix.h"
#include "krt.h"
int shutting_down;
/*
* Debugging
*/
void
async_dump(void)
{
debug("INTERNAL STATE DUMP\n\n");
rdump(&root_pool);
sk_dump_all();
tm_dump_all();
if_dump_all();
neigh_dump_all();
rta_dump_all();
rt_dump_all();
protos_dump_all();
debug("\n");
}
/*
* Reading the Configuration
*/
static int conf_fd;
static char *config_name = PATH_CONFIG;
static int
cf_read(byte *dest, unsigned int len)
{
int l = read(conf_fd, dest, len);
if (l < 0)
cf_error("Read error");
return l;
}
static void
read_config(void)
{
struct config *conf = config_alloc(config_name);
conf_fd = open(config_name, O_RDONLY);
if (conf_fd < 0)
die("Unable to open configuration file %s: %m", config_name);
cf_read_hook = cf_read;
if (!config_parse(conf))
die("%s, line %d: %s", config_name, conf->err_lino, conf->err_msg);
config_commit(conf);
}
void
async_config(void)
{
debug("Asynchronous reconfigurations are not supported in demo version\n");
}
/*
* Shutdown
*/
void
async_shutdown(void)
{
debug("Shutting down...\n");
shutting_down = 1;
protos_shutdown();
}
void
protos_shutdown_notify(void)
{
die("System shutdown completed");
}
/*
* Signals
*/
static void
handle_sighup(int sig)
{
debug("Caught SIGHUP...\n");
async_config_flag = 1;
}
static void
handle_sigusr(int sig)
{
debug("Caught SIGUSR...\n");
async_dump_flag = 1;
}
static void
handle_sigterm(int sig)
{
debug("Caught SIGTERM...\n");
async_shutdown_flag = 1;
}
static void
signal_init(void)
{
struct sigaction sa;
bzero(&sa, sizeof(sa));
sa.sa_handler = handle_sigusr;
sa.sa_flags = SA_RESTART;
sigaction(SIGUSR1, &sa, NULL);
sa.sa_handler = handle_sighup;
sa.sa_flags = SA_RESTART;
sigaction(SIGHUP, &sa, NULL);
sa.sa_handler = handle_sigterm;
sa.sa_flags = SA_RESTART;
sigaction(SIGTERM, &sa, NULL);
signal(SIGPIPE, SIG_IGN);
}
/*
* Parsing of command-line arguments
*/
static char *opt_list = "c:d:";
static void
usage(void)
{
fprintf(stderr, "Usage: bird [-c <config-file>] [-d <debug-file>]\n");
exit(1);
}
static void
parse_args(int argc, char **argv)
{
int c;
while ((c = getopt(argc, argv, opt_list)) >= 0)
switch (c)
{
case 'c':
config_name = optarg;
break;
case 'd':
log_init_debug(optarg);
break;
default:
usage();
}
if (optind < argc)
usage();
}
/*
* Hic Est main()
*/
int
main(int argc, char **argv)
{
#ifdef HAVE_LIBDMALLOC
if (!getenv("DMALLOC_OPTIONS"))
dmalloc_debug(0x2f03d00);
#endif
log_init_debug(NULL);
parse_args(argc, argv);
log(L_INFO "Launching BIRD 0.0.0...");
debug("Initializing.\n");
resource_init();
io_init();
rt_init();
if_init();
protos_build();
add_tail(&protocol_list, &proto_unix_kernel.n);
add_tail(&protocol_list, &proto_unix_iface.n);
read_config();
signal_init();
protos_start();
ev_run_list(&global_event_list);
async_dump();
debug("Entering I/O loop.\n");
io_loop();
bug("I/O loop died");
}
|
