[mirror_frr.git] / babeld / babel_main.c

/*
Copyright 2011 by Matthieu Boutier and Juliusz Chroboczek

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/

/* include zebra library */
#include <zebra.h>
#include "getopt.h"
#include "if.h"
#include "log.h"
#include "thread.h"
#include "privs.h"
#include "sigevent.h"
#include "version.h"
#include "command.h"
#include "vty.h"
#include "memory.h"
#include "libfrr.h"
#include "lib_errors.h"

#include "babel_main.h"
#include "babeld.h"
#include "util.h"
#include "kernel.h"
#include "babel_interface.h"
#include "neighbour.h"
#include "route.h"
#include "xroute.h"
#include "message.h"
#include "resend.h"
#include "babel_zebra.h"
#include "babel_errors.h"

static void babel_fail(void);
static void babel_init_random(void);
static void babel_replace_by_null(int fd);
static void babel_exit_properly(void);
static void babel_save_state_file(void);


struct thread_master *master;     /* quagga's threads handler */
struct timeval babel_now;         /* current time             */

unsigned char myid[8];            /* unique id (mac address of an interface) */
int debug = 0;

int resend_delay = -1;

const unsigned char zeroes[16] = {0};
const unsigned char ones[16] =
    {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
     0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};

static char state_file[1024];

unsigned char protocol_group[16]; /* babel's link-local multicast address */
int protocol_port;                /* babel's port */
int protocol_socket = -1;         /* socket: communicate with others babeld */

static const char babel_config_default[] = SYSCONFDIR BABEL_DEFAULT_CONFIG;
static char *babel_vty_addr = NULL;
static int babel_vty_port = BABEL_VTY_PORT;

/* babeld privileges */
static zebra_capabilities_t _caps_p [] =
{
    ZCAP_NET_RAW,
    ZCAP_BIND
};

struct zebra_privs_t babeld_privs =
{
#if defined(FRR_USER)
    .user = FRR_USER,
#endif
#if defined FRR_GROUP
    .group = FRR_GROUP,
#endif
#ifdef VTY_GROUP
    .vty_group = VTY_GROUP,
#endif
    .caps_p = _caps_p,
    .cap_num_p = array_size(_caps_p),
    .cap_num_i = 0
};

static void
babel_sigexit(void)
{
    zlog_notice("Terminating on signal");

    babel_exit_properly();
}

static void
babel_sigusr1 (void)
{
    zlog_rotate ();
}

static struct quagga_signal_t babel_signals[] =
  {
    {
      .signal = SIGUSR1,
      .handler = &babel_sigusr1,
    },
    {
      .signal = SIGINT,
      .handler = &babel_sigexit,
    },
    {
      .signal = SIGTERM,
      .handler = &babel_sigexit,
    },
  };

struct option longopts[] =
  {
    { 0 }
  };

static const struct frr_yang_module_info *const babeld_yang_modules[] = {
	&frr_filter_info,
	&frr_interface_info,
	&frr_vrf_info,
};

FRR_DAEMON_INFO(babeld, BABELD,
		.vty_port = BABEL_VTY_PORT,
		.proghelp = "Implementation of the BABEL routing protocol.",

		.signals = babel_signals,
		.n_signals = array_size(babel_signals),

		.privs = &babeld_privs,

		.yang_modules = babeld_yang_modules,
		.n_yang_modules = array_size(babeld_yang_modules),
);

int
main(int argc, char **argv)
{
    int rc;

    frr_preinit (&babeld_di, argc, argv);
    frr_opt_add ("", longopts, "");

    babel_init_random();

    /* set the Babel's default link-local multicast address and Babel's port */
    parse_address("ff02:0:0:0:0:0:1:6", protocol_group, NULL);
    protocol_port = 6696;

    /* get options */
    while(1) {
        int opt;

	opt = frr_getopt (argc, argv, NULL);

	if (opt == EOF)
	  break;

	switch (opt)
	  {
	  case 0:
	    break;
	  default:
	    frr_help_exit (1);
	    break;
	  }
    }

    snprintf(state_file, sizeof(state_file), "%s/%s",
	     frr_vtydir, "babel-state");

    /* create the threads handler */
    master = frr_init ();

    /* Library inits. */
    babel_error_init();

    resend_delay = BABEL_DEFAULT_RESEND_DELAY;
    change_smoothing_half_life(BABEL_DEFAULT_SMOOTHING_HALF_LIFE);

    babel_replace_by_null(STDIN_FILENO);

    /* init some quagga's dependencies, and babeld's commands */
    if_zapi_callbacks(babel_ifp_create, babel_ifp_up,
		      babel_ifp_down, babel_ifp_destroy);
    babeld_quagga_init();
    /* init zebra client's structure and it's commands */
    /* this replace kernel_setup && kernel_setup_socket */
    babelz_zebra_init ();

    /* init buffer */
    rc = resize_receive_buffer(1500);
    if(rc < 0)
        babel_fail();

    schedule_neighbours_check(5000, 1);

    frr_config_fork();
    frr_run(master);

    return 0;
}

static void
babel_fail(void)
{
    exit(1);
}

/* initialize random value, and set 'babel_now' by the way. */
static void
babel_init_random(void)
{
    gettime(&babel_now);
    int rc;
    unsigned int seed;

    rc = read_random_bytes(&seed, sizeof(seed));
    if(rc < 0) {
        flog_err_sys(EC_LIB_SYSTEM_CALL, "read(random): %s",
		  safe_strerror(errno));
        seed = 42;
    }

    seed ^= (babel_now.tv_sec ^ babel_now.tv_usec);
    srandom(seed);
}

/*
 close fd, and replace it by "/dev/null"
 exit if error
 */
static void
babel_replace_by_null(int fd)
{
    int fd_null;
    int rc;

    fd_null = open("/dev/null", O_RDONLY);
    if(fd_null < 0) {
        flog_err_sys(EC_LIB_SYSTEM_CALL, "open(null): %s", safe_strerror(errno));
        exit(1);
    }

    rc = dup2(fd_null, fd);
    if(rc < 0) {
        flog_err_sys(EC_LIB_SYSTEM_CALL, "dup2(null, 0): %s",
		  safe_strerror(errno));
        exit(1);
    }

    close(fd_null);
}

/*
 Load the state file: check last babeld's running state, usefull in case of
 "/etc/init.d/babeld restart"
 */
void
babel_load_state_file(void)
{
    int fd;
    int rc;

    fd = open(state_file, O_RDONLY);
    if(fd < 0 && errno != ENOENT)
        flog_err_sys(EC_LIB_SYSTEM_CALL, "open(babel-state: %s)",
		  safe_strerror(errno));
    rc = unlink(state_file);
    if(fd >= 0 && rc < 0) {
        flog_err_sys(EC_LIB_SYSTEM_CALL, "unlink(babel-state): %s",
		  safe_strerror(errno));
        /* If we couldn't unlink it, it's probably stale. */
        goto fini;
    }
    if(fd >= 0) {
        char buf[100];
        char buf2[100];
        int s;
        long t;
        rc = read(fd, buf, 99);
        if(rc < 0) {
            flog_err_sys(EC_LIB_SYSTEM_CALL, "read(babel-state): %s",
		      safe_strerror(errno));
        } else {
            buf[rc] = '\0';
            rc = sscanf(buf, "%99s %d %ld\n", buf2, &s, &t);
            if(rc == 3 && s >= 0 && s <= 0xFFFF) {
                unsigned char sid[8];
                rc = parse_eui64(buf2, sid);
                if(rc < 0) {
                    flog_err(EC_BABEL_CONFIG, "Couldn't parse babel-state.");
                } else {
                    struct timeval realnow;
                    debugf(BABEL_DEBUG_COMMON,
                           "Got %s %d %ld from babel-state.",
                           format_eui64(sid), s, t);
                    gettimeofday(&realnow, NULL);
                    if(memcmp(sid, myid, 8) == 0)
                        myseqno = seqno_plus(s, 1);
                    else
                        flog_err(EC_BABEL_CONFIG,
				 "ID mismatch in babel-state. id=%s; old=%s",
                                 format_eui64(myid),
                                 format_eui64(sid));
                }
            } else {
                flog_err(EC_BABEL_CONFIG, "Couldn't parse babel-state.");
            }
        }
        goto fini;
    }
fini:
    if (fd >= 0)
        close(fd);
    return ;
}

static void
babel_exit_properly(void)
{
    debugf(BABEL_DEBUG_COMMON, "Exiting...");
    usleep(roughly(10000));
    gettime(&babel_now);

    /* Uninstall and flush all routes. */
    debugf(BABEL_DEBUG_COMMON, "Uninstall routes.");
    flush_all_routes();
    babel_interface_close_all();
    babel_zebra_close_connexion();
    babel_save_state_file();
    debugf(BABEL_DEBUG_COMMON, "Remove pid file.");
    debugf(BABEL_DEBUG_COMMON, "Done.");
    frr_fini();

    exit(0);
}

static void
babel_save_state_file(void)
{
    int fd;
    int rc;

    debugf(BABEL_DEBUG_COMMON, "Save state file.");
    fd = open(state_file, O_WRONLY | O_TRUNC | O_CREAT, 0644);
    if(fd < 0) {
        flog_err_sys(EC_LIB_SYSTEM_CALL, "creat(babel-state): %s",
		  safe_strerror(errno));
        unlink(state_file);
    } else {
        struct timeval realnow;
        char buf[100];
        gettimeofday(&realnow, NULL);
        rc = snprintf(buf, 100, "%s %d %ld\n",
                      format_eui64(myid), (int)myseqno,
                      (long)realnow.tv_sec);
        if(rc < 0 || rc >= 100) {
            flog_err(EC_BABEL_CONFIG, "write(babel-state): overflow.");
            unlink(state_file);
        } else {
            rc = write(fd, buf, rc);
            if(rc < 0) {
                flog_err(EC_BABEL_CONFIG, "write(babel-state): %s",
			  safe_strerror(errno));
                unlink(state_file);
            }
            fsync(fd);
        }
        close(fd);
    }
}

void
show_babel_main_configuration (struct vty *vty)
{
    vty_out (vty,
            "state file              = %s\n"
            "configuration file      = %s\n"
            "protocol information:\n"
            "  multicast address     = %s\n"
            "  port                  = %d\n"
            "vty address             = %s\n"
            "vty port                = %d\n"
            "id                      = %s\n"
            "kernel_metric           = %d\n",
            state_file,
            babeld_di.config_file ? babeld_di.config_file : babel_config_default,
            format_address(protocol_group),
            protocol_port,
            babel_vty_addr ? babel_vty_addr : "None",
            babel_vty_port,
            format_eui64(myid),
            kernel_metric);
}
Commit	Line	Data
ca10883e DS	1	/*
	2	Copyright 2011 by Matthieu Boutier and Juliusz Chroboczek
	3
	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:
	10
	11	The above copyright notice and this permission notice shall be included in
	12	all copies or substantial portions of the Software.
	13
	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
	20	THE SOFTWARE.
	21	*/
	22
	23	/* include zebra library */
	24	#include <zebra.h>
	25	#include "getopt.h"
	26	#include "if.h"
	27	#include "log.h"
	28	#include "thread.h"
	29	#include "privs.h"
	30	#include "sigevent.h"
	31	#include "version.h"
	32	#include "command.h"
	33	#include "vty.h"
	34	#include "memory.h"
	35	#include "libfrr.h"
f135ba52	36	#include "lib_errors.h"
ca10883e DS	37
	38	#include "babel_main.h"
	39	#include "babeld.h"
	40	#include "util.h"
	41	#include "kernel.h"
	42	#include "babel_interface.h"
	43	#include "neighbour.h"
	44	#include "route.h"
	45	#include "xroute.h"
	46	#include "message.h"
	47	#include "resend.h"
	48	#include "babel_zebra.h"
f135ba52	49	#include "babel_errors.h"
ca10883e	50
ca10883e DS	51	static void babel_fail(void);
	52	static void babel_init_random(void);
	53	static void babel_replace_by_null(int fd);
	54	static void babel_exit_properly(void);
	55	static void babel_save_state_file(void);
	56
	57
	58	struct thread_master master; / quagga's threads handler */
	59	struct timeval babel_now; /* current time */
	60
	61	unsigned char myid[8]; /* unique id (mac address of an interface) */
	62	int debug = 0;
	63
	64	int resend_delay = -1;
	65
	66	const unsigned char zeroes[16] = {0};
	67	const unsigned char ones[16] =
	68	{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
	69	0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
	70
43e587c1	71	static char state_file[1024];
ca10883e DS	72
	73	unsigned char protocol_group[16]; /* babel's link-local multicast address */
	74	int protocol_port; /* babel's port */
	75	int protocol_socket = -1; /* socket: communicate with others babeld */
	76
2b64873d	77	static const char babel_config_default[] = SYSCONFDIR BABEL_DEFAULT_CONFIG;
ca10883e DS	78	static char *babel_vty_addr = NULL;
	79	static int babel_vty_port = BABEL_VTY_PORT;
	80
	81	/* babeld privileges */
	82	static zebra_capabilities_t _caps_p [] =
	83	{
	84	ZCAP_NET_RAW,
	85	ZCAP_BIND
	86	};
900b8c58	87
346526cc	88	struct zebra_privs_t babeld_privs =
ca10883e	89	{
dd329373 DS	90	#if defined(FRR_USER)
dd329373 DS	91	.user = FRR_USER,
ca10883e	92	#endif
dd329373 DS	93	#if defined FRR_GROUP
dd329373 DS	94	.group = FRR_GROUP,
ca10883e DS	95	#endif
	96	#ifdef VTY_GROUP
	97	.vty_group = VTY_GROUP,
	98	#endif
	99	.caps_p = _caps_p,
900b8c58	100	.cap_num_p = array_size(_caps_p),
ca10883e DS	101	.cap_num_i = 0
	102	};
	103
	104	static void
	105	babel_sigexit(void)
	106	{
	107	zlog_notice("Terminating on signal");
	108
	109	babel_exit_properly();
	110	}
	111
	112	static void
	113	babel_sigusr1 (void)
	114	{
	115	zlog_rotate ();
	116	}
	117
	118	static struct quagga_signal_t babel_signals[] =
	119	{
	120	{
	121	.signal = SIGUSR1,
	122	.handler = &babel_sigusr1,
	123	},
	124	{
	125	.signal = SIGINT,
	126	.handler = &babel_sigexit,
	127	},
	128	{
	129	.signal = SIGTERM,
	130	.handler = &babel_sigexit,
	131	},
	132	};
	133
	134	struct option longopts[] =
	135	{
	136	{ 0 }
	137	};
	138
6fd8972a	139	static const struct frr_yang_module_info *const babeld_yang_modules[] = {
fb7f5aa8	140	&frr_filter_info,
6fd8972a CS	141	&frr_interface_info,
	142	&frr_vrf_info,
	143	};
8fcdd0d6	144
ca10883e DS	145	FRR_DAEMON_INFO(babeld, BABELD,
	146	.vty_port = BABEL_VTY_PORT,
	147	.proghelp = "Implementation of the BABEL routing protocol.",
	148
	149	.signals = babel_signals,
	150	.n_signals = array_size(babel_signals),
	151
	152	.privs = &babeld_privs,
8fcdd0d6 RW	153
	154	.yang_modules = babeld_yang_modules,
	155	.n_yang_modules = array_size(babeld_yang_modules),
80413c20	156	);
ca10883e DS	157
	158	int
	159	main(int argc, char **argv)
	160	{
900b8c58	161	int rc;
ca10883e	162
900b8c58 DS	163	frr_preinit (&babeld_di, argc, argv);
900b8c58 DS	164	frr_opt_add ("", longopts, "");
f135ba52	165
ca10883e DS	166	babel_init_random();
	167
	168	/* set the Babel's default link-local multicast address and Babel's port */
	169	parse_address("ff02:0:0:0:0:0:1:6", protocol_group, NULL);
	170	protocol_port = 6696;
	171
	172	/* get options */
	173	while(1) {
	174	int opt;
	175
	176	opt = frr_getopt (argc, argv, NULL);
	177
	178	if (opt == EOF)
	179	break;
	180
	181	switch (opt)
	182	{
	183	case 0:
	184	break;
	185	default:
	186	frr_help_exit (1);
	187	break;
	188	}
	189	}
	190
3c649c71 DS	191	snprintf(state_file, sizeof(state_file), "%s/%s",
	192	frr_vtydir, "babel-state");
	193
ca10883e	194	/* create the threads handler */
900b8c58	195	master = frr_init ();
ca10883e DS	196
ca10883e DS	197	/* Library inits. */
f135ba52	198	babel_error_init();
ca10883e DS	199
	200	resend_delay = BABEL_DEFAULT_RESEND_DELAY;
	201	change_smoothing_half_life(BABEL_DEFAULT_SMOOTHING_HALF_LIFE);
	202
	203	babel_replace_by_null(STDIN_FILENO);
	204
	205	/* init some quagga's dependencies, and babeld's commands */
138c5a74 DS	206	if_zapi_callbacks(babel_ifp_create, babel_ifp_up,
138c5a74 DS	207	babel_ifp_down, babel_ifp_destroy);
ca10883e DS	208	babeld_quagga_init();
	209	/* init zebra client's structure and it's commands */
	210	/* this replace kernel_setup && kernel_setup_socket */
	211	babelz_zebra_init ();
	212
ca10883e DS	213	/* init buffer */
	214	rc = resize_receive_buffer(1500);
	215	if(rc < 0)
	216	babel_fail();
	217
	218	schedule_neighbours_check(5000, 1);
	219
900b8c58 DS	220	frr_config_fork();
	221	frr_run(master);
	222
	223	return 0;
ca10883e DS	224	}
	225
	226	static void
	227	babel_fail(void)
	228	{
	229	exit(1);
	230	}
	231
	232	/* initialize random value, and set 'babel_now' by the way. */
	233	static void
	234	babel_init_random(void)
	235	{
	236	gettime(&babel_now);
	237	int rc;
	238	unsigned int seed;
	239
	240	rc = read_random_bytes(&seed, sizeof(seed));
	241	if(rc < 0) {
450971aa	242	flog_err_sys(EC_LIB_SYSTEM_CALL, "read(random): %s",
f135ba52	243	safe_strerror(errno));
ca10883e DS	244	seed = 42;
	245	}
	246
	247	seed ^= (babel_now.tv_sec ^ babel_now.tv_usec);
	248	srandom(seed);
	249	}
	250
	251	/*
	252	close fd, and replace it by "/dev/null"
	253	exit if error
	254	*/
	255	static void
	256	babel_replace_by_null(int fd)
	257	{
	258	int fd_null;
	259	int rc;
	260
	261	fd_null = open("/dev/null", O_RDONLY);
	262	if(fd_null < 0) {
450971aa	263	flog_err_sys(EC_LIB_SYSTEM_CALL, "open(null): %s", safe_strerror(errno));
ca10883e DS	264	exit(1);
	265	}
	266
	267	rc = dup2(fd_null, fd);
	268	if(rc < 0) {
450971aa	269	flog_err_sys(EC_LIB_SYSTEM_CALL, "dup2(null, 0): %s",
f135ba52	270	safe_strerror(errno));
ca10883e DS	271	exit(1);
	272	}
	273
	274	close(fd_null);
	275	}
	276
	277	/*
	278	Load the state file: check last babeld's running state, usefull in case of
	279	"/etc/init.d/babeld restart"
	280	*/
	281	void
	282	babel_load_state_file(void)
	283	{
	284	int fd;
	285	int rc;
	286
	287	fd = open(state_file, O_RDONLY);
	288	if(fd < 0 && errno != ENOENT)
450971aa	289	flog_err_sys(EC_LIB_SYSTEM_CALL, "open(babel-state: %s)",
f135ba52	290	safe_strerror(errno));
ca10883e DS	291	rc = unlink(state_file);
ca10883e DS	292	if(fd >= 0 && rc < 0) {
450971aa	293	flog_err_sys(EC_LIB_SYSTEM_CALL, "unlink(babel-state): %s",
f135ba52	294	safe_strerror(errno));
ca10883e	295	/* If we couldn't unlink it, it's probably stale. */
c31a793b	296	goto fini;
ca10883e DS	297	}
	298	if(fd >= 0) {
	299	char buf[100];
	300	char buf2[100];
	301	int s;
	302	long t;
	303	rc = read(fd, buf, 99);
	304	if(rc < 0) {
450971aa	305	flog_err_sys(EC_LIB_SYSTEM_CALL, "read(babel-state): %s",
f135ba52	306	safe_strerror(errno));
ca10883e DS	307	} else {
	308	buf[rc] = '\0';
	309	rc = sscanf(buf, "%99s %d %ld\n", buf2, &s, &t);
	310	if(rc == 3 && s >= 0 && s <= 0xFFFF) {
	311	unsigned char sid[8];
	312	rc = parse_eui64(buf2, sid);
	313	if(rc < 0) {
5b003f31	314	flog_err(EC_BABEL_CONFIG, "Couldn't parse babel-state.");
ca10883e DS	315	} else {
	316	struct timeval realnow;
	317	debugf(BABEL_DEBUG_COMMON,
	318	"Got %s %d %ld from babel-state.",
	319	format_eui64(sid), s, t);
	320	gettimeofday(&realnow, NULL);
	321	if(memcmp(sid, myid, 8) == 0)
	322	myseqno = seqno_plus(s, 1);
	323	else
5b003f31	324	flog_err(EC_BABEL_CONFIG,
e33b116c	325	"ID mismatch in babel-state. id=%s; old=%s",
ca10883e DS	326	format_eui64(myid),
	327	format_eui64(sid));
	328	}
	329	} else {
5b003f31	330	flog_err(EC_BABEL_CONFIG, "Couldn't parse babel-state.");
ca10883e DS	331	}
ca10883e DS	332	}
c31a793b	333	goto fini;
ca10883e	334	}
c31a793b VJ	335	fini:
	336	if (fd >= 0)
	337	close(fd);
	338	return ;
ca10883e DS	339	}
	340
	341	static void
	342	babel_exit_properly(void)
	343	{
	344	debugf(BABEL_DEBUG_COMMON, "Exiting...");
	345	usleep(roughly(10000));
	346	gettime(&babel_now);
	347
	348	/* Uninstall and flush all routes. */
	349	debugf(BABEL_DEBUG_COMMON, "Uninstall routes.");
	350	flush_all_routes();
	351	babel_interface_close_all();
	352	babel_zebra_close_connexion();
	353	babel_save_state_file();
	354	debugf(BABEL_DEBUG_COMMON, "Remove pid file.");
	355	debugf(BABEL_DEBUG_COMMON, "Done.");
8879bd22	356	frr_fini();
ca10883e DS	357
	358	exit(0);
	359	}
	360
	361	static void
	362	babel_save_state_file(void)
	363	{
	364	int fd;
	365	int rc;
	366
	367	debugf(BABEL_DEBUG_COMMON, "Save state file.");
	368	fd = open(state_file, O_WRONLY \| O_TRUNC \| O_CREAT, 0644);
	369	if(fd < 0) {
450971aa	370	flog_err_sys(EC_LIB_SYSTEM_CALL, "creat(babel-state): %s",
f135ba52	371	safe_strerror(errno));
ca10883e DS	372	unlink(state_file);
	373	} else {
	374	struct timeval realnow;
	375	char buf[100];
	376	gettimeofday(&realnow, NULL);
	377	rc = snprintf(buf, 100, "%s %d %ld\n",
	378	format_eui64(myid), (int)myseqno,
	379	(long)realnow.tv_sec);
	380	if(rc < 0 \|\| rc >= 100) {
5b003f31	381	flog_err(EC_BABEL_CONFIG, "write(babel-state): overflow.");
ca10883e DS	382	unlink(state_file);
	383	} else {
	384	rc = write(fd, buf, rc);
	385	if(rc < 0) {
5b003f31	386	flog_err(EC_BABEL_CONFIG, "write(babel-state): %s",
e33b116c	387	safe_strerror(errno));
ca10883e DS	388	unlink(state_file);
	389	}
	390	fsync(fd);
	391	}
	392	close(fd);
	393	}
	394	}
	395
	396	void
	397	show_babel_main_configuration (struct vty *vty)
	398	{
181039f3	399	vty_out (vty,
cdda2010 DL	400	"state file = %s\n"
cdda2010 DL	401	"configuration file = %s\n"
0437e105	402	"protocol information:\n"
cdda2010 DL	403	" multicast address = %s\n"
	404	" port = %d\n"
	405	"vty address = %s\n"
	406	"vty port = %d\n"
	407	"id = %s\n"
181039f3	408	"kernel_metric = %d\n",
cdda2010	409	state_file,
f714218e	410	babeld_di.config_file ? babeld_di.config_file : babel_config_default,
cdda2010 DL	411	format_address(protocol_group),
cdda2010 DL	412	protocol_port,
ca10883e	413	babel_vty_addr ? babel_vty_addr : "None",
cdda2010 DL	414	babel_vty_port,
cdda2010 DL	415	format_eui64(myid),
96ade3ed	416	kernel_metric);
ca10883e	417	}