2 Copyright 2011 by Matthieu Boutier and Juliusz Chroboczek
4 Permission is hereby granted, free of charge, to any person obtaining a copy
5 of this software and associated documentation files (the "Software"), to deal
6 in the Software without restriction, including without limitation the rights
7 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8 copies of the Software, and to permit persons to whom the Software is
9 furnished to do so, subject to the following conditions:
11 The above copyright notice and this permission notice shall be included in
12 all copies or substantial portions of the Software.
14 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
23 /* include zebra library */
37 #include "babel_main.h"
41 #include "babel_interface.h"
42 #include "neighbour.h"
47 #include "babel_zebra.h"
49 static void babel_fail(void);
50 static void babel_init_random(void);
51 static void babel_replace_by_null(int fd
);
52 static void babel_exit_properly(void);
53 static void babel_save_state_file(void);
56 struct thread_master
*master
; /* quagga's threads handler */
57 struct timeval babel_now
; /* current time */
59 unsigned char myid
[8]; /* unique id (mac address of an interface) */
62 int resend_delay
= -1;
64 const unsigned char zeroes
[16] = {0};
65 const unsigned char ones
[16] =
66 {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
67 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
69 static const char *state_file
= DAEMON_VTY_DIR
"/babel-state";
71 unsigned char protocol_group
[16]; /* babel's link-local multicast address */
72 int protocol_port
; /* babel's port */
73 int protocol_socket
= -1; /* socket: communicate with others babeld */
75 static char babel_config_default
[] = SYSCONFDIR BABEL_DEFAULT_CONFIG
;
76 static char *babel_vty_addr
= NULL
;
77 static int babel_vty_port
= BABEL_VTY_PORT
;
79 /* babeld privileges */
80 static zebra_capabilities_t _caps_p
[] =
86 struct zebra_privs_t babeld_privs
=
95 .vty_group
= VTY_GROUP
,
98 .cap_num_p
= array_size(_caps_p
),
105 zlog_notice("Terminating on signal");
107 babel_exit_properly();
116 static struct quagga_signal_t babel_signals
[] =
120 .handler
= &babel_sigusr1
,
124 .handler
= &babel_sigexit
,
128 .handler
= &babel_sigexit
,
132 struct option longopts
[] =
137 FRR_DAEMON_INFO(babeld
, BABELD
,
138 .vty_port
= BABEL_VTY_PORT
,
139 .proghelp
= "Implementation of the BABEL routing protocol.",
141 .signals
= babel_signals
,
142 .n_signals
= array_size(babel_signals
),
144 .privs
= &babeld_privs
,
148 main(int argc
, char **argv
)
152 frr_preinit (&babeld_di
, argc
, argv
);
153 frr_opt_add ("", longopts
, "");
157 /* set the Babel's default link-local multicast address and Babel's port */
158 parse_address("ff02:0:0:0:0:0:1:6", protocol_group
, NULL
);
159 protocol_port
= 6696;
165 opt
= frr_getopt (argc
, argv
, NULL
);
180 /* create the threads handler */
181 master
= frr_init ();
184 zprivs_init (&babeld_privs
);
188 resend_delay
= BABEL_DEFAULT_RESEND_DELAY
;
189 change_smoothing_half_life(BABEL_DEFAULT_SMOOTHING_HALF_LIFE
);
191 babel_replace_by_null(STDIN_FILENO
);
193 /* init some quagga's dependencies, and babeld's commands */
194 babeld_quagga_init();
195 /* init zebra client's structure and it's commands */
196 /* this replace kernel_setup && kernel_setup_socket */
197 babelz_zebra_init ();
200 rc
= resize_receive_buffer(1500);
204 schedule_neighbours_check(5000, 1);
218 /* initialize random value, and set 'babel_now' by the way. */
220 babel_init_random(void)
226 rc
= read_random_bytes(&seed
, sizeof(seed
));
228 zlog_err("read(random): %s", safe_strerror(errno
));
232 seed
^= (babel_now
.tv_sec
^ babel_now
.tv_usec
);
237 close fd, and replace it by "/dev/null"
241 babel_replace_by_null(int fd
)
246 fd_null
= open("/dev/null", O_RDONLY
);
248 zlog_err("open(null): %s", safe_strerror(errno
));
252 rc
= dup2(fd_null
, fd
);
254 zlog_err("dup2(null, 0): %s", safe_strerror(errno
));
262 Load the state file: check last babeld's running state, usefull in case of
263 "/etc/init.d/babeld restart"
266 babel_load_state_file(void)
271 fd
= open(state_file
, O_RDONLY
);
272 if(fd
< 0 && errno
!= ENOENT
)
273 zlog_err("open(babel-state: %s)", safe_strerror(errno
));
274 rc
= unlink(state_file
);
275 if(fd
>= 0 && rc
< 0) {
276 zlog_err("unlink(babel-state): %s", safe_strerror(errno
));
277 /* If we couldn't unlink it, it's probably stale. */
285 rc
= read(fd
, buf
, 99);
287 zlog_err("read(babel-state): %s", safe_strerror(errno
));
290 rc
= sscanf(buf
, "%99s %d %ld\n", buf2
, &s
, &t
);
291 if(rc
== 3 && s
>= 0 && s
<= 0xFFFF) {
292 unsigned char sid
[8];
293 rc
= parse_eui64(buf2
, sid
);
295 zlog_err("Couldn't parse babel-state.");
297 struct timeval realnow
;
298 debugf(BABEL_DEBUG_COMMON
,
299 "Got %s %d %ld from babel-state.",
300 format_eui64(sid
), s
, t
);
301 gettimeofday(&realnow
, NULL
);
302 if(memcmp(sid
, myid
, 8) == 0)
303 myseqno
= seqno_plus(s
, 1);
305 zlog_err("ID mismatch in babel-state. id=%s; old=%s",
310 zlog_err("Couldn't parse babel-state.");
322 babel_exit_properly(void)
324 debugf(BABEL_DEBUG_COMMON
, "Exiting...");
325 usleep(roughly(10000));
328 /* Uninstall and flush all routes. */
329 debugf(BABEL_DEBUG_COMMON
, "Uninstall routes.");
331 babel_interface_close_all();
332 babel_zebra_close_connexion();
333 babel_save_state_file();
334 debugf(BABEL_DEBUG_COMMON
, "Remove pid file.");
335 debugf(BABEL_DEBUG_COMMON
, "Done.");
342 babel_save_state_file(void)
347 debugf(BABEL_DEBUG_COMMON
, "Save state file.");
348 fd
= open(state_file
, O_WRONLY
| O_TRUNC
| O_CREAT
, 0644);
350 zlog_err("creat(babel-state): %s", safe_strerror(errno
));
353 struct timeval realnow
;
355 gettimeofday(&realnow
, NULL
);
356 rc
= snprintf(buf
, 100, "%s %d %ld\n",
357 format_eui64(myid
), (int)myseqno
,
358 (long)realnow
.tv_sec
);
359 if(rc
< 0 || rc
>= 100) {
360 zlog_err("write(babel-state): overflow.");
363 rc
= write(fd
, buf
, rc
);
365 zlog_err("write(babel-state): %s", safe_strerror(errno
));
375 show_babel_main_configuration (struct vty
*vty
)
379 "configuration file = %s\n"
380 "protocol informations:\n"
381 " multicast address = %s\n"
386 "kernel_metric = %d\n",
388 babeld_di
.config_file
? babeld_di
.config_file
: babel_config_default
,
389 format_address(protocol_group
),
391 babel_vty_addr
? babel_vty_addr
: "None",