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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 |