[ipfire-2.x.git] / src / ibod / ibod.c

/* Customised version of ibod - GUI code removed by Mark Wormgoor\r
 *                              Buffer overflow fixes by Robert Kerr\r
 *\r
 * ibod originally by Bjoern Smith\r
 */\r
\r
static char *rcsId = "$Id: ibod.c,v 1.1.1.1.8.1 2005/05/07 12:46:16 rkerr Exp $";\r
static char *rcsSymbol = "$Symbol$";\r
\r
#include <stdlib.h>\r
#include <string.h>\r
#include <stdio.h>\r
#include <signal.h>\r
#include <sys/time.h>\r
#include <sys/types.h>\r
#include <sys/stat.h>\r
#include <fcntl.h>\r
#include <sys/socket.h>\r
#include <netinet/in.h>\r
#include <linux/isdn.h>\r
#include <syslog.h>\r
#include <errno.h>\r
#include "ibod.h"\r
\r
static int setattr();\r
static void reread(int sig);\r
static void pipehndl(int sig);\r
static void setinterval();\r
static void get_if_state();\r
static int bring_up_slave();\r
static int bring_down_slave();\r
static Conf cf;\r
static struct timeval timeout, tv_last, tv_up;\r
static int usageflags[ISDN_MAX_CHANNELS];\r
static char phone[ISDN_MAX_CHANNELS][20];\r
static Siobytes iobytes[ISDN_MAX_CHANNELS];\r
static unsigned long in_bytes_last, out_bytes_last;\r
static unsigned long in_bytes_per_sec, out_bytes_per_sec;\r
static unsigned long channels_last;\r
static int  channels_now;\r
\r
main(int argc, char *argv[])\r
{\r
    openlog("ibod", LOG_PID, LOG_DAEMON);\r
\r
    channels_last = -1;\r
\r
    /* Setup initial attributes */\r
    if (setattr() == -1) {\r
        closelog();\r
        exit(1);\r
    }\r
\r
    setinterval();\r
\r
    /* Setup handlig of signal SIGHUP and SIGPIPE */\r
    signal(SIGHUP, reread);\r
    signal(SIGPIPE, pipehndl);\r
\r
    do {\r
        setinterval();\r
\r
	usleep(timeout.tv_usec);\r
\r
        /* Gate state of interface */\r
        get_if_state();\r
\r
    } while (1);\r
}\r
\r
\r
static int setattr()\r
{\r
    FILE *fd;\r
    char config_filename[MAX_STR_LEN] = IBOD_DEFAULT_DIR "/ibod.cf";\r
    char linebuf[MAX_STR_LEN];\r
    char *key, *value;\r
    int  val;\r
\r
    strcpy(cf.dev, DEVICE);\r
    cf.enable      = ENABLE;\r
    cf.interval    = INTERVAL;\r
    cf.filter      = FILTER;\r
    cf.limit       = LIMIT;\r
    cf.stayup      = STAYUP;\r
    cf.stayup_time = STAYUP_TIME;\r
\r
    /* Open config file */\r
    if ((fd = fopen(config_filename, "r")) == NULL) {\r
        syslog(LOG_ERR, "%s: %s\n", config_filename, strerror(errno));\r
        return -1;\r
    }\r
\r
    /* Loop over the config file to setup attributes */\r
    while (fgets(linebuf, MAX_STR_LEN, fd) != NULL) {\r
\r
        if (*linebuf == '#')		/* Ignore comments */\r
            continue;\r
\r
        key = strtok(linebuf, " \t");\r
        value = strtok(NULL, " \t\n");\r
\r
        if (strcmp(key, "DEVICE") == 0) {\r
            if (strcmp(cf.dev, value) != 0)\r
                syslog(LOG_NOTICE,\r
                       "Parameter DEVICE reconfigured to %s\n", value);\r
            snprintf(cf.dev, 32,"%s", value);\r
        }\r
\r
        if (strcmp(key, "ENABLE") == 0) {\r
            val = atoi(value);\r
            if (cf.enable != val)\r
                syslog(LOG_NOTICE,\r
                       "Parameter ENABLE reconfigured to %d\n", val);\r
            cf.enable = val;\r
        }\r
\r
        if (strcmp(key, "INTERVAL") == 0) {\r
            val = atoi(value);\r
            if (cf.interval != val)\r
                syslog(LOG_NOTICE,\r
                       "Parameter INTERVAL reconfigured to %d\n", val);\r
            cf.interval = atoi(value);\r
        }\r
\r
        if (strcmp(key, "FILTER") == 0) {\r
            val = atoi(value);\r
            if (cf.filter != val)\r
                syslog(LOG_NOTICE,\r
                       "Parameter FILTER reconfigured to %d\n", val);\r
            cf.filter = atoi(value);\r
        }\r
\r
        if (strcmp(key, "LIMIT") == 0) {\r
            val = atoi(value);\r
            if (cf.limit != val)\r
                syslog(LOG_NOTICE,\r
                       "Parameter LIMIT reconfigured to %d\n", val);\r
            cf.limit = atoi(value);\r
        }\r
\r
        if (strcmp(key, "STAYUP") == 0) {\r
            val = atoi(value);\r
            if (cf.stayup != val)\r
                syslog(LOG_NOTICE,\r
                       "Parameter STAYUP reconfigured to %d\n", val);\r
            cf.stayup = atoi(value);\r
        }\r
\r
        if (strcmp(key, "STAYUP_TIME") == 0) {\r
            val = atoi(value);\r
            if (cf.stayup_time != val)\r
                syslog(LOG_NOTICE,\r
                       "Parameter STAYUP_TIME reconfigured to %d\n", val);\r
            cf.stayup_time = atoi(value);\r
        }\r
    }\r
\r
    fclose(fd);\r
    return 0;\r
}\r
\r
\r
\r
static void setinterval()\r
{\r
    timeout.tv_sec = cf.interval / 1000;\r
    timeout.tv_usec = (cf.interval % 1000) * 1000;\r
}\r
\r
\r
static void reread(int sig)\r
{\r
    (void) setattr();\r
\r
    setinterval();\r
\r
    signal(SIGHUP, reread);\r
}\r
\r
\r
static void pipehndl(int sig)\r
{\r
    syslog(LOG_ERR, "caught SIGPIPE: %s\n", sys_errlist[errno]);\r
\r
    signal(SIGPIPE, pipehndl);\r
}\r
\r
\r
static void get_if_state()\r
{\r
    static char buf[4096];\r
    struct timeval tv_now;\r
    int    ms_delta;\r
    int    in_bytes_now, out_bytes_now;\r
    int  fd;\r
    int  i;\r
\r
    /* Open the info device */\r
    if ((fd = open(ISDN_INFO_DEV, O_RDONLY | O_NDELAY)) < 0) {\r
        syslog(LOG_ERR, "%s: %s\n", ISDN_INFO_DEV, sys_errlist[errno]);\r
        closelog();\r
        exit(1);\r
    }\r
\r
    /* Whats the time now */\r
    gettimeofday(&tv_now, NULL);\r
    ms_delta = (tv_now.tv_sec * 1000 + tv_now.tv_usec / 1000) -\r
               (tv_last.tv_sec * 1000 + tv_last.tv_usec / 1000);\r
    tv_last = tv_now;\r
\r
    /* Get info from interface */\r
    if (read(fd, buf, sizeof(buf))> 0) {\r
        sscanf(strstr(buf, "usage:"),\r
            "usage: %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d",\r
            &usageflags[0], &usageflags[1], &usageflags[2], &usageflags[3],\r
            &usageflags[4], &usageflags[5], &usageflags[6], &usageflags[7],\r
            &usageflags[8], &usageflags[9], &usageflags[10], &usageflags[11],\r
            &usageflags[12], &usageflags[13], &usageflags[14], &usageflags[15]);\r
        sscanf(strstr(buf, "phone:"),\r
            "phone: %s %s %s %s %s %s %s %s %s %s %s %s %s %s %s %s",\r
            phone[0], phone[1], phone[2], phone[3],\r
            phone[4], phone[5], phone[6], phone[7],\r
            phone[8], phone[8], phone[10], phone[11],\r
            phone[12], phone[13], phone[14], phone[15]);\r
    }\r
\r
    in_bytes_now = 0;\r
    out_bytes_now = 0;\r
    channels_now = 0;\r
\r
    /* Get byte in/out for all channels */\r
    if (ioctl(fd, IIOCGETCPS, &iobytes)) {\r
        syslog(LOG_ERR, "%s: %s\n", IIOCGETCPS, sys_errlist[errno]);\r
        closelog();\r
        exit(1);\r
    }\r
    close(fd);\r
          \r
    /* Count number of open channes and total in/out bytes */\r
    for (i = 0; i < ISDN_MAX_CHANNELS; i++) {\r
        if (usageflags[i]) {\r
            channels_now++;\r
            in_bytes_now += iobytes[i].ibytes;\r
            out_bytes_now += iobytes[i].obytes;\r
        }\r
    }\r
\r
    if (channels_last == -1 || channels_now < channels_last) {\r
        channels_last = channels_now;\r
        in_bytes_last = in_bytes_now;\r
        out_bytes_last = out_bytes_now;\r
        return;\r
    }\r
\r
    /* Calculate the total through put in bytes/sec */\r
    if (cf.filter < 1) {\r
        in_bytes_per_sec =\r
            (in_bytes_now - in_bytes_last) * 1000 / ms_delta;\r
        out_bytes_per_sec =\r
            (out_bytes_now - out_bytes_last) * 1000 / ms_delta;\r
    }\r
    else {\r
        in_bytes_per_sec = (in_bytes_per_sec * (cf.filter - 1) +\r
            (in_bytes_now - in_bytes_last) * 1000 / ms_delta) / cf.filter;\r
        out_bytes_per_sec = (out_bytes_per_sec * (cf.filter - 1) +\r
            (out_bytes_now - out_bytes_last) * 1000 / ms_delta) / cf.filter;\r
    }\r
\r
    in_bytes_last = in_bytes_now;\r
    out_bytes_last = out_bytes_now;\r
\r
    if (channels_now == 0) {\r
        channels_last = channels_now;\r
        return;\r
    }\r
\r
    /* Take up or down slave channel */\r
\r
    if (cf.enable == 0) {\r
        channels_last = channels_now;\r
        return;\r
    }\r
\r
    if (channels_now == 1 &&\r
        (in_bytes_per_sec > cf.limit || out_bytes_per_sec >  cf.limit)) {\r
\r
        /* Bring up slave interface */\r
        if (bring_up_slave() == -1)\r
            exit(1);\r
\r
        /* Start stay up timer */\r
        gettimeofday(&tv_up, NULL);\r
    }\r
\r
    if ((channels_now > 1) &&\r
        (in_bytes_per_sec <= cf.limit) &&\r
        (out_bytes_per_sec <= cf.limit) &&\r
        (cf.stayup == 0)) {\r
\r
        /* Check that the min stay up timer has expired */\r
        gettimeofday(&tv_now, NULL);\r
        if (tv_now.tv_sec - tv_up.tv_sec > cf.stayup_time) {\r
\r
            /* Bring down slave interface */\r
            if (bring_down_slave() == -1)\r
                exit(1);\r
        }\r
    }\r
\r
    channels_last = channels_now;\r
}\r
\r
\r
static int bring_up_slave()\r
{\r
    int  fd, rc;\r
\r
    if ((fd = open(ISDN_CTLR_DEV, O_RDWR)) < 0) {\r
        syslog(LOG_ERR, "%s: %s\n", ISDN_CTLR_DEV, sys_errlist[errno]);\r
        closelog();\r
        return -1;\r
    }\r
\r
    if ((rc = ioctl(fd, IIOCNETALN, cf.dev)) < 0) {\r
        syslog(LOG_ERR, "%s: %s\n", cf.dev, sys_errlist[errno]);\r
        closelog();\r
        return -1;\r
    }\r
\r
    close(fd);\r
\r
    if (! rc) {\r
        syslog(LOG_NOTICE, "added new link\n");\r
        channels_now = 2;\r
    }\r
\r
    return 0;\r
}\r
\r
\r
static int bring_down_slave()\r
{\r
    int  fd, rc;\r
\r
    if ((fd = open(ISDN_CTLR_DEV, O_RDWR)) < 0) {\r
        syslog(LOG_ERR, "%s: %s\n", ISDN_CTLR_DEV, sys_errlist[errno]);\r
        closelog();\r
        return -1;\r
    }\r
\r
    if ((rc = ioctl(fd, IIOCNETDLN, cf.dev)) < 0) {\r
        syslog(LOG_ERR, "%s: %s\n", cf.dev, sys_errlist[errno]);\r
        closelog();\r
        return -1;\r
    }\r
\r
    close(fd);\r
\r
    if (rc)\r
        syslog(LOG_ERR, "unable to remove additional link: %d\n", rc);\r
    else {\r
        syslog(LOG_NOTICE, "removed link\n");\r
    }\r
\r
    return 0;\r
}\r
Commit	Line	Data
cd1a2927 MT	1	/* Customised version of ibod - GUI code removed by Mark Wormgoor\r
	2	* Buffer overflow fixes by Robert Kerr\r
	3	*\r
	4	* ibod originally by Bjoern Smith\r
	5	*/\r
	6	\r
	7	static char *rcsId = "$Id: ibod.c,v 1.1.1.1.8.1 2005/05/07 12:46:16 rkerr Exp $";\r
	8	static char *rcsSymbol = "$Symbol$";\r
	9	\r
	10	#include <stdlib.h>\r
	11	#include <string.h>\r
	12	#include <stdio.h>\r
	13	#include <signal.h>\r
	14	#include <sys/time.h>\r
	15	#include <sys/types.h>\r
	16	#include <sys/stat.h>\r
	17	#include <fcntl.h>\r
	18	#include <sys/socket.h>\r
	19	#include <netinet/in.h>\r
	20	#include <linux/isdn.h>\r
	21	#include <syslog.h>\r
	22	#include <errno.h>\r
	23	#include "ibod.h"\r
	24	\r
	25	static int setattr();\r
	26	static void reread(int sig);\r
	27	static void pipehndl(int sig);\r
	28	static void setinterval();\r
	29	static void get_if_state();\r
	30	static int bring_up_slave();\r
	31	static int bring_down_slave();\r
	32	static Conf cf;\r
	33	static struct timeval timeout, tv_last, tv_up;\r
	34	static int usageflags[ISDN_MAX_CHANNELS];\r
	35	static char phone[ISDN_MAX_CHANNELS][20];\r
	36	static Siobytes iobytes[ISDN_MAX_CHANNELS];\r
	37	static unsigned long in_bytes_last, out_bytes_last;\r
	38	static unsigned long in_bytes_per_sec, out_bytes_per_sec;\r
	39	static unsigned long channels_last;\r
	40	static int channels_now;\r
	41	\r
	42	main(int argc, char *argv[])\r
	43	{\r
	44	openlog("ibod", LOG_PID, LOG_DAEMON);\r
	45	\r
	46	channels_last = -1;\r
	47	\r
	48	/* Setup initial attributes */\r
	49	if (setattr() == -1) {\r
	50	closelog();\r
	51	exit(1);\r
	52	}\r
	53	\r
	54	setinterval();\r
	55	\r
	56	/* Setup handlig of signal SIGHUP and SIGPIPE */\r
	57	signal(SIGHUP, reread);\r
	58	signal(SIGPIPE, pipehndl);\r
	59	\r
	60	do {\r
	61	setinterval();\r
	62	\r
	63	usleep(timeout.tv_usec);\r
	64	\r
65	/* Gate state of interface */\r
66	get_if_state();\r
67	\r
68	} while (1);\r
69	}\r
70	\r
71	\r
72	static int setattr()\r
73	{\r
74	FILE *fd;\r
75	char config_filename[MAX_STR_LEN] = IBOD_DEFAULT_DIR "/ibod.cf";\r
76	char linebuf[MAX_STR_LEN];\r
77	char key, value;\r
78	int val;\r
79	\r
80	strcpy(cf.dev, DEVICE);\r
81	cf.enable = ENABLE;\r
82	cf.interval = INTERVAL;\r
83	cf.filter = FILTER;\r
84	cf.limit = LIMIT;\r
85	cf.stayup = STAYUP;\r
86	cf.stayup_time = STAYUP_TIME;\r
87	\r
88	/* Open config file */\r
89	if ((fd = fopen(config_filename, "r")) == NULL) {\r
90	syslog(LOG_ERR, "%s: %s\n", config_filename, strerror(errno));\r
91	return -1;\r
92	}\r
93	\r
94	/* Loop over the config file to setup attributes */\r
95	while (fgets(linebuf, MAX_STR_LEN, fd) != NULL) {\r
96	\r
97	if (linebuf == '#') / Ignore comments */\r
98	continue;\r
99	\r
100	key = strtok(linebuf, " \t");\r
101	value = strtok(NULL, " \t\n");\r
102	\r
103	if (strcmp(key, "DEVICE") == 0) {\r
104	if (strcmp(cf.dev, value) != 0)\r
105	syslog(LOG_NOTICE,\r
106	"Parameter DEVICE reconfigured to %s\n", value);\r
107	snprintf(cf.dev, 32,"%s", value);\r
108	}\r
109	\r
110	if (strcmp(key, "ENABLE") == 0) {\r
111	val = atoi(value);\r
112	if (cf.enable != val)\r
113	syslog(LOG_NOTICE,\r
114	"Parameter ENABLE reconfigured to %d\n", val);\r
115	cf.enable = val;\r
116	}\r
117	\r
118	if (strcmp(key, "INTERVAL") == 0) {\r
119	val = atoi(value);\r
120	if (cf.interval != val)\r
121	syslog(LOG_NOTICE,\r
122	"Parameter INTERVAL reconfigured to %d\n", val);\r
123	cf.interval = atoi(value);\r
124	}\r
125	\r
126	if (strcmp(key, "FILTER") == 0) {\r
127	val = atoi(value);\r
128	if (cf.filter != val)\r
129	syslog(LOG_NOTICE,\r
130	"Parameter FILTER reconfigured to %d\n", val);\r
131	cf.filter = atoi(value);\r
132	}\r
133	\r
134	if (strcmp(key, "LIMIT") == 0) {\r
135	val = atoi(value);\r
136	if (cf.limit != val)\r
137	syslog(LOG_NOTICE,\r
138	"Parameter LIMIT reconfigured to %d\n", val);\r
139	cf.limit = atoi(value);\r
140	}\r
141	\r
142	if (strcmp(key, "STAYUP") == 0) {\r
143	val = atoi(value);\r
144	if (cf.stayup != val)\r
145	syslog(LOG_NOTICE,\r
146	"Parameter STAYUP reconfigured to %d\n", val);\r
147	cf.stayup = atoi(value);\r
148	}\r
149	\r
150	if (strcmp(key, "STAYUP_TIME") == 0) {\r
151	val = atoi(value);\r
152	if (cf.stayup_time != val)\r
153	syslog(LOG_NOTICE,\r
154	"Parameter STAYUP_TIME reconfigured to %d\n", val);\r
155	cf.stayup_time = atoi(value);\r
156	}\r
157	}\r
158	\r
159	fclose(fd);\r
160	return 0;\r
161	}\r
162	\r
163	\r
164	\r
165	static void setinterval()\r
166	{\r
167	timeout.tv_sec = cf.interval / 1000;\r
168	timeout.tv_usec = (cf.interval % 1000) * 1000;\r
169	}\r
170	\r
171	\r
172	static void reread(int sig)\r
173	{\r
174	(void) setattr();\r
175	\r
176	setinterval();\r
177	\r
178	signal(SIGHUP, reread);\r
179	}\r
180	\r
181	\r
182	static void pipehndl(int sig)\r
183	{\r
184	syslog(LOG_ERR, "caught SIGPIPE: %s\n", sys_errlist[errno]);\r
185	\r
186	signal(SIGPIPE, pipehndl);\r
187	}\r
188	\r
189	\r
190	static void get_if_state()\r
191	{\r
192	static char buf[4096];\r
193	struct timeval tv_now;\r
194	int ms_delta;\r
195	int in_bytes_now, out_bytes_now;\r
196	int fd;\r
197	int i;\r
198	\r
199	/* Open the info device */\r
200	if ((fd = open(ISDN_INFO_DEV, O_RDONLY \| O_NDELAY)) < 0) {\r
201	syslog(LOG_ERR, "%s: %s\n", ISDN_INFO_DEV, sys_errlist[errno]);\r
202	closelog();\r
203	exit(1);\r
204	}\r
205	\r
206	/* Whats the time now */\r
207	gettimeofday(&tv_now, NULL);\r
208	ms_delta = (tv_now.tv_sec * 1000 + tv_now.tv_usec / 1000) -\r
209	(tv_last.tv_sec * 1000 + tv_last.tv_usec / 1000);\r
210	tv_last = tv_now;\r
211	\r
212	/* Get info from interface */\r
213	if (read(fd, buf, sizeof(buf))> 0) {\r
214	sscanf(strstr(buf, "usage:"),\r
215	"usage: %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d",\r
216	&usageflags[0], &usageflags[1], &usageflags[2], &usageflags[3],\r
217	&usageflags[4], &usageflags[5], &usageflags[6], &usageflags[7],\r
218	&usageflags[8], &usageflags[9], &usageflags[10], &usageflags[11],\r
219	&usageflags[12], &usageflags[13], &usageflags[14], &usageflags[15]);\r
220	sscanf(strstr(buf, "phone:"),\r
221	"phone: %s %s %s %s %s %s %s %s %s %s %s %s %s %s %s %s",\r
222	phone[0], phone[1], phone[2], phone[3],\r
223	phone[4], phone[5], phone[6], phone[7],\r
224	phone[8], phone[8], phone[10], phone[11],\r
225	phone[12], phone[13], phone[14], phone[15]);\r
226	}\r
227	\r
228	in_bytes_now = 0;\r
229	out_bytes_now = 0;\r
230	channels_now = 0;\r
231	\r
232	/* Get byte in/out for all channels */\r
233	if (ioctl(fd, IIOCGETCPS, &iobytes)) {\r
234	syslog(LOG_ERR, "%s: %s\n", IIOCGETCPS, sys_errlist[errno]);\r
235	closelog();\r
236	exit(1);\r
237	}\r
238	close(fd);\r
239	\r
240	/* Count number of open channes and total in/out bytes */\r
241	for (i = 0; i < ISDN_MAX_CHANNELS; i++) {\r
242	if (usageflags[i]) {\r
243	channels_now++;\r
244	in_bytes_now += iobytes[i].ibytes;\r
245	out_bytes_now += iobytes[i].obytes;\r
246	}\r
247	}\r
248	\r
249	if (channels_last == -1 \|\| channels_now < channels_last) {\r
250	channels_last = channels_now;\r
251	in_bytes_last = in_bytes_now;\r
252	out_bytes_last = out_bytes_now;\r
253	return;\r
254	}\r
255	\r
256	/* Calculate the total through put in bytes/sec */\r
257	if (cf.filter < 1) {\r
258	in_bytes_per_sec =\r
259	(in_bytes_now - in_bytes_last) * 1000 / ms_delta;\r
260	out_bytes_per_sec =\r
261	(out_bytes_now - out_bytes_last) * 1000 / ms_delta;\r
262	}\r
263	else {\r
264	in_bytes_per_sec = (in_bytes_per_sec * (cf.filter - 1) +\r
265	(in_bytes_now - in_bytes_last) * 1000 / ms_delta) / cf.filter;\r
266	out_bytes_per_sec = (out_bytes_per_sec * (cf.filter - 1) +\r
267	(out_bytes_now - out_bytes_last) * 1000 / ms_delta) / cf.filter;\r
268	}\r
269	\r
270	in_bytes_last = in_bytes_now;\r
271	out_bytes_last = out_bytes_now;\r
272	\r
273	if (channels_now == 0) {\r
274	channels_last = channels_now;\r
275	return;\r
276	}\r
277	\r
278	/* Take up or down slave channel */\r
279	\r
280	if (cf.enable == 0) {\r
281	channels_last = channels_now;\r
282	return;\r
283	}\r
284	\r
285	if (channels_now == 1 &&\r
286	(in_bytes_per_sec > cf.limit \|\| out_bytes_per_sec > cf.limit)) {\r
287	\r
288	/* Bring up slave interface */\r
289	if (bring_up_slave() == -1)\r
290	exit(1);\r
291	\r
292	/* Start stay up timer */\r
293	gettimeofday(&tv_up, NULL);\r
294	}\r
295	\r
296	if ((channels_now > 1) &&\r
297	(in_bytes_per_sec <= cf.limit) &&\r
298	(out_bytes_per_sec <= cf.limit) &&\r
299	(cf.stayup == 0)) {\r
300	\r
301	/* Check that the min stay up timer has expired */\r
302	gettimeofday(&tv_now, NULL);\r
303	if (tv_now.tv_sec - tv_up.tv_sec > cf.stayup_time) {\r
304	\r
305	/* Bring down slave interface */\r
306	if (bring_down_slave() == -1)\r
307	exit(1);\r
308	}\r
309	}\r
310	\r
311	channels_last = channels_now;\r
312	}\r
313	\r
314	\r
315	static int bring_up_slave()\r
316	{\r
317	int fd, rc;\r
318	\r
319	if ((fd = open(ISDN_CTLR_DEV, O_RDWR)) < 0) {\r
320	syslog(LOG_ERR, "%s: %s\n", ISDN_CTLR_DEV, sys_errlist[errno]);\r
321	closelog();\r
322	return -1;\r
323	}\r
324	\r
325	if ((rc = ioctl(fd, IIOCNETALN, cf.dev)) < 0) {\r
326	syslog(LOG_ERR, "%s: %s\n", cf.dev, sys_errlist[errno]);\r
327	closelog();\r
328	return -1;\r
329	}\r
330	\r
331	close(fd);\r
332	\r
333	if (! rc) {\r
334	syslog(LOG_NOTICE, "added new link\n");\r
335	channels_now = 2;\r
336	}\r
337	\r
338	return 0;\r
339	}\r
340	\r
341	\r
342	static int bring_down_slave()\r
343	{\r
344	int fd, rc;\r
345	\r
346	if ((fd = open(ISDN_CTLR_DEV, O_RDWR)) < 0) {\r
347	syslog(LOG_ERR, "%s: %s\n", ISDN_CTLR_DEV, sys_errlist[errno]);\r
348	closelog();\r
349	return -1;\r
350	}\r
351	\r
352	if ((rc = ioctl(fd, IIOCNETDLN, cf.dev)) < 0) {\r
353	syslog(LOG_ERR, "%s: %s\n", cf.dev, sys_errlist[errno]);\r
354	closelog();\r
355	return -1;\r
356	}\r
357	\r
358	close(fd);\r
359	\r
360	if (rc)\r
361	syslog(LOG_ERR, "unable to remove additional link: %d\n", rc);\r
362	else {\r
363	syslog(LOG_NOTICE, "removed link\n");\r
364	}\r
365	\r
366	return 0;\r
367	}\r