2 * This file is free software: you may copy, redistribute and/or modify it
3 * under the terms of the GNU General Public License as published by the
4 * Free Software Foundation, either version 2 of the License, or (at your
5 * option) any later version.
7 * This file is distributed in the hope that it will be useful, but
8 * WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
10 * General Public License for more details.
12 * You should have received a copy of the GNU General Public License
13 * along with this program. If not, see <http://www.gnu.org/licenses/>.
15 * This file incorporates work covered by the following copyright and
19 Copyright 2011 by Matthieu Boutier and Juliusz Chroboczek
21 Permission is hereby granted, free of charge, to any person obtaining a copy
22 of this software and associated documentation files (the "Software"), to deal
23 in the Software without restriction, including without limitation the rights
24 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
25 copies of the Software, and to permit persons to whom the Software is
26 furnished to do so, subject to the following conditions:
28 The above copyright notice and this permission notice shall be included in
29 all copies or substantial portions of the Software.
31 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
32 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
33 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
34 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
35 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
36 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
40 /* include zebra library */
53 #include "babel_main.h"
57 #include "babel_interface.h"
58 #include "neighbour.h"
63 #include "babel_zebra.h"
66 static void babel_init (int argc
, char **argv
);
67 static char *babel_get_progname(char *argv_0
);
68 static void babel_fail(void);
69 static void babel_init_random(void);
70 static void babel_replace_by_null(int fd
);
71 static void babel_init_signals(void);
72 static void babel_exit_properly(void);
73 static void babel_save_state_file(void);
76 struct thread_master
*master
; /* quagga's threads handler */
77 struct timeval babel_now
; /* current time */
79 unsigned char myid
[8]; /* unique id (mac address of an interface) */
80 int debug
= BABEL_DEBUG_COMMON
;
82 int default_wireless_hello_interval
= -1;
83 int default_wired_hello_interval
= -1;
84 int resend_delay
= -1;
85 static const char *pidfile
= PATH_BABELD_PID
;
87 const unsigned char zeroes
[16] = {0};
88 const unsigned char ones
[16] =
89 {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
90 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
92 static const char *state_file
= DAEMON_VTY_DIR
"/babel-state";
94 unsigned char protocol_group
[16]; /* babel's link-local multicast address */
95 int protocol_port
; /* babel's port */
96 int protocol_socket
= -1; /* socket: communicate with others babeld */
98 static char babel_config_default
[] = SYSCONFDIR BABEL_DEFAULT_CONFIG
;
99 static char *babel_config_file
= NULL
;
100 static char *babel_vty_addr
= NULL
;
101 static int babel_vty_port
= BABEL_VTY_PORT
;
103 /* Babeld options. */
104 struct option longopts
[] =
106 { "daemon", no_argument
, NULL
, 'd'},
107 { "config_file", required_argument
, NULL
, 'f'},
108 { "pid_file", required_argument
, NULL
, 'i'},
109 { "socket", required_argument
, NULL
, 'z'},
110 { "help", no_argument
, NULL
, 'h'},
111 { "vty_addr", required_argument
, NULL
, 'A'},
112 { "vty_port", required_argument
, NULL
, 'P'},
113 { "user", required_argument
, NULL
, 'u'},
114 { "group", required_argument
, NULL
, 'g'},
115 { "version", no_argument
, NULL
, 'v'},
119 /* babeld privileges */
120 static zebra_capabilities_t _caps_p
[] =
125 static struct zebra_privs_t babeld_privs
=
127 #if defined(QUAGGA_USER)
130 #if defined QUAGGA_GROUP
131 .group
= QUAGGA_GROUP
,
134 .vty_group
= VTY_GROUP
,
143 main(int argc
, char **argv
)
145 struct thread thread
;
146 /* and print banner too */
147 babel_init(argc
, argv
);
148 while (thread_fetch (master
, &thread
)) {
149 thread_call (&thread
);
155 babel_usage (char *progname
, int status
)
158 fprintf (stderr
, "Try `%s --help' for more information.\n", progname
);
161 printf ("Usage : %s [OPTION...]\n\
162 Daemon which manages Babel routing protocol.\n\n\
163 -d, --daemon Runs in daemon mode\n\
164 -f, --config_file Set configuration file name\n\
165 -i, --pid_file Set process identifier file name\n\
166 -z, --socket Set path of zebra socket\n\
167 -A, --vty_addr Set vty's bind address\n\
168 -P, --vty_port Set vty's port number\n\
169 -u, --user User to run as\n\
170 -g, --group Group to run as\n\
171 -v, --version Print program version\n\
172 -h, --help Display this help and exit\n\
174 Report bugs to %s\n", progname
, ZEBRA_BUG_ADDRESS
);
179 /* make initialisations witch don't need infos about kernel(interfaces, etc.) */
181 babel_init(int argc
, char **argv
)
184 int do_daemonise
= 0;
185 char *progname
= NULL
;
187 /* Set umask before anything for security */
189 progname
= babel_get_progname(argv
[0]);
191 /* set default log (lib/log.h) */
192 zlog_default
= openzlog(progname
, ZLOG_BABEL
,
193 LOG_CONS
|LOG_NDELAY
|LOG_PID
, LOG_DAEMON
);
194 /* set log destination as stdout until the config file is read */
195 zlog_set_level(NULL
, ZLOG_DEST_STDOUT
, LOG_WARNING
);
199 /* set the Babel's default link-local multicast address and Babel's port */
200 parse_address("ff02:0:0:0:0:0:1:6", protocol_group
, NULL
);
201 protocol_port
= 6696;
205 opt
= getopt_long(argc
, argv
, "df:i:z:hA:P:u:g:v", longopts
, 0);
216 babel_config_file
= optarg
;
222 zclient_serv_path_set (optarg
);
225 babel_vty_addr
= optarg
;
228 babel_vty_port
= atoi (optarg
);
229 if (babel_vty_port
<= 0 || babel_vty_port
> 0xffff)
230 babel_vty_port
= BABEL_VTY_PORT
;
233 babeld_privs
.user
= optarg
;
236 babeld_privs
.group
= optarg
;
239 print_version (progname
);
243 babel_usage (progname
, 0);
246 babel_usage (progname
, 1);
251 /* create the threads handler */
252 master
= thread_master_create ();
255 zprivs_init (&babeld_privs
);
256 babel_init_signals();
261 if(default_wireless_hello_interval
<= 0)
262 default_wireless_hello_interval
= 4000;
263 default_wireless_hello_interval
= MAX(default_wireless_hello_interval
, 5);
265 if(default_wired_hello_interval
<= 0)
266 default_wired_hello_interval
= 4000;
267 default_wired_hello_interval
= MAX(default_wired_hello_interval
, 5);
270 resend_delay
= MIN(resend_delay
, default_wireless_hello_interval
/ 2);
271 resend_delay
= MIN(resend_delay
, default_wired_hello_interval
/ 2);
272 resend_delay
= MAX(resend_delay
, 20);
274 if(parasitic
&& allow_duplicates
>= 0) {
275 /* Too difficult to get right. */
276 zlog_err("Sorry, -P and -A are incompatible.");
280 babel_replace_by_null(STDIN_FILENO
);
282 if (do_daemonise
&& daemonise() < 0) {
283 zlog_err("daemonise: %s", safe_strerror(errno
));
288 if (pid_output(pidfile
) < 0) {
289 zlog_err("error while writing pidfile");
293 /* init some quagga's dependencies, and babeld's commands */
294 babeld_quagga_init();
295 /* init zebra client's structure and it's commands */
296 /* this replace kernel_setup && kernel_setup_socket */
297 babelz_zebra_init ();
299 /* Sort all installed commands. */
302 /* Get zebra configuration file. */
303 zlog_set_level (NULL
, ZLOG_DEST_STDOUT
, ZLOG_DISABLED
);
304 vty_read_config (babel_config_file
, babel_config_default
);
306 /* Create VTY socket */
307 vty_serv_sock (babel_vty_addr
, babel_vty_port
, BABEL_VTYSH_PATH
);
310 rc
= resize_receive_buffer(1500);
314 schedule_neighbours_check(5000, 1);
316 zlog_notice ("BABELd %s starting: vty@%d", BABEL_VERSION
, babel_vty_port
);
319 /* return the progname (without path, example: "./x/progname" --> "progname") */
321 babel_get_progname(char *argv_0
) {
322 char *p
= strrchr (argv_0
, '/');
323 return (p
? ++p
: argv_0
);
332 /* initialize random value, and set 'babel_now' by the way. */
334 babel_init_random(void)
340 rc
= read_random_bytes(&seed
, sizeof(seed
));
342 zlog_err("read(random): %s", safe_strerror(errno
));
346 seed
^= (babel_now
.tv_sec
^ babel_now
.tv_usec
);
351 close fd, and replace it by "/dev/null"
355 babel_replace_by_null(int fd
)
360 fd_null
= open("/dev/null", O_RDONLY
);
362 zlog_err("open(null): %s", safe_strerror(errno
));
366 rc
= dup2(fd_null
, fd
);
368 zlog_err("dup2(null, 0): %s", safe_strerror(errno
));
376 Load the state file: check last babeld's running state, usefull in case of
377 "/etc/init.d/babeld restart"
380 babel_load_state_file(void)
385 fd
= open(state_file
, O_RDONLY
);
386 if(fd
< 0 && errno
!= ENOENT
)
387 zlog_err("open(babel-state: %s)", safe_strerror(errno
));
388 rc
= unlink(state_file
);
389 if(fd
>= 0 && rc
< 0) {
390 zlog_err("unlink(babel-state): %s", safe_strerror(errno
));
391 /* If we couldn't unlink it, it's probably stale. */
400 rc
= read(fd
, buf
, 99);
402 zlog_err("read(babel-state): %s", safe_strerror(errno
));
405 rc
= sscanf(buf
, "%99s %d %ld\n", buf2
, &s
, &t
);
406 if(rc
== 3 && s
>= 0 && s
<= 0xFFFF) {
407 unsigned char sid
[8];
408 rc
= parse_eui64(buf2
, sid
);
410 zlog_err("Couldn't parse babel-state.");
412 struct timeval realnow
;
413 debugf(BABEL_DEBUG_COMMON
,
414 "Got %s %d %ld from babel-state.",
415 format_eui64(sid
), s
, t
);
416 gettimeofday(&realnow
, NULL
);
417 if(memcmp(sid
, myid
, 8) == 0)
418 myseqno
= seqno_plus(s
, 1);
420 zlog_err("ID mismatch in babel-state. id=%s; old=%s",
425 zlog_err("Couldn't parse babel-state.");
436 zlog_notice("Terminating on signal");
438 babel_exit_properly();
448 babel_init_signals(void)
450 static struct quagga_signal_t babel_signals
[] =
454 .handler
= &babel_sigusr1
,
458 .handler
= &babel_sigexit
,
462 .handler
= &babel_sigexit
,
466 signal_init (master
, Q_SIGC(babel_signals
), babel_signals
);
470 babel_exit_properly(void)
472 debugf(BABEL_DEBUG_COMMON
, "Exiting...");
473 usleep(roughly(10000));
476 /* Uninstall and flush all routes. */
477 debugf(BABEL_DEBUG_COMMON
, "Uninstall routes.");
479 babel_interface_close_all();
480 babel_zebra_close_connexion();
481 babel_save_state_file();
482 debugf(BABEL_DEBUG_COMMON
, "Remove pid file.");
485 debugf(BABEL_DEBUG_COMMON
, "Done.");
491 babel_save_state_file(void)
496 debugf(BABEL_DEBUG_COMMON
, "Save state file.");
497 fd
= open(state_file
, O_WRONLY
| O_TRUNC
| O_CREAT
, 0644);
499 zlog_err("creat(babel-state): %s", safe_strerror(errno
));
502 struct timeval realnow
;
504 gettimeofday(&realnow
, NULL
);
505 rc
= snprintf(buf
, 100, "%s %d %ld\n",
506 format_eui64(myid
), (int)myseqno
,
507 (long)realnow
.tv_sec
);
508 if(rc
< 0 || rc
>= 100) {
509 zlog_err("write(babel-state): overflow.");
512 rc
= write(fd
, buf
, rc
);
514 zlog_err("write(babel-state): %s", safe_strerror(errno
));
524 show_babel_main_configuration (struct vty
*vty
)
527 vty_out(vty
, "No debug.%s", VTY_NEWLINE
);
529 vty_out(vty
, "Activated debug options:");
530 if (debug
== BABEL_DEBUG_ALL
) {
531 vty_out(vty
, " all%s", VTY_NEWLINE
);
533 vty_out(vty
, "%s%s%s%s%s%s%s%s%s%s%s%s%s",
534 debug
& BABEL_DEBUG_COMMON
? VTY_NEWLINE
: "",
535 debug
& BABEL_DEBUG_COMMON
? " common" : "",
536 debug
& BABEL_DEBUG_KERNEL
? VTY_NEWLINE
: "",
537 debug
& BABEL_DEBUG_KERNEL
? " kernel" : "",
538 debug
& BABEL_DEBUG_FILTER
? VTY_NEWLINE
: "",
539 debug
& BABEL_DEBUG_FILTER
? " filter" : "",
540 debug
& BABEL_DEBUG_TIMEOUT
? VTY_NEWLINE
: "",
541 debug
& BABEL_DEBUG_TIMEOUT
? " timeout" : "",
542 debug
& BABEL_DEBUG_IF
? VTY_NEWLINE
: "",
543 debug
& BABEL_DEBUG_IF
? " interface": "",
544 debug
& BABEL_DEBUG_ROUTE
? VTY_NEWLINE
: "",
545 debug
& BABEL_DEBUG_ROUTE
? " route" : "",
553 "configuration file = %s%s"
554 "protocol informations:%s"
555 " multicast address = %s%s"
561 "resend-delay = %d%s"
562 "allow_duplicates = %s%s"
563 "kernel_metric = %d%s",
564 pidfile
, VTY_NEWLINE
,
565 state_file
, VTY_NEWLINE
,
566 babel_config_file
? babel_config_file
: babel_config_default
,
569 format_address(protocol_group
), VTY_NEWLINE
,
570 protocol_port
, VTY_NEWLINE
,
571 babel_vty_addr
? babel_vty_addr
: "None",
573 babel_vty_port
, VTY_NEWLINE
,
574 format_eui64(myid
), VTY_NEWLINE
,
575 format_bool(parasitic
), VTY_NEWLINE
,
576 resend_delay
, VTY_NEWLINE
,
577 format_bool(allow_duplicates
), VTY_NEWLINE
,
578 kernel_metric
, VTY_NEWLINE
);