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Commit | Line | Data |
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aba5acdf SH |
1 | /* |
2 | * ifstat.c handy utility to read net interface statistics | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
6 | * as published by the Free Software Foundation; either version | |
7 | * 2 of the License, or (at your option) any later version. | |
8 | * | |
9 | * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> | |
10 | */ | |
11 | ||
12 | #include <stdio.h> | |
13 | #include <stdlib.h> | |
14 | #include <unistd.h> | |
15 | #include <fcntl.h> | |
16 | #include <string.h> | |
17 | #include <errno.h> | |
18 | #include <time.h> | |
19 | #include <sys/time.h> | |
20 | #include <fnmatch.h> | |
21 | #include <sys/file.h> | |
22 | #include <sys/socket.h> | |
23 | #include <sys/un.h> | |
24 | #include <sys/poll.h> | |
25 | #include <sys/wait.h> | |
26 | #include <sys/stat.h> | |
27 | #include <signal.h> | |
28 | #include <math.h> | |
9f3ea250 | 29 | #include <getopt.h> |
aba5acdf SH |
30 | |
31 | #include <libnetlink.h> | |
daf7bd5c SH |
32 | #include <linux/if.h> |
33 | #include <linux/if_link.h> | |
aba5acdf SH |
34 | |
35 | #include <SNAPSHOT.h> | |
36 | ||
37 | int dump_zeros = 0; | |
38 | int reset_history = 0; | |
39 | int ignore_history = 0; | |
40 | int no_output = 0; | |
ec3e625c | 41 | int json_output = 0; |
aba5acdf SH |
42 | int no_update = 0; |
43 | int scan_interval = 0; | |
44 | int time_constant = 0; | |
45 | int show_errors = 0; | |
46 | double W; | |
47 | char **patterns; | |
48 | int npatterns; | |
49 | ||
50 | char info_source[128]; | |
51 | int source_mismatch; | |
52 | ||
a571587d | 53 | #define MAXS (sizeof(struct rtnl_link_stats)/sizeof(__u32)) |
aba5acdf SH |
54 | |
55 | struct ifstat_ent | |
56 | { | |
57 | struct ifstat_ent *next; | |
58 | char *name; | |
59 | int ifindex; | |
60 | unsigned long long val[MAXS]; | |
61 | double rate[MAXS]; | |
a571587d | 62 | __u32 ival[MAXS]; |
aba5acdf SH |
63 | }; |
64 | ||
ec3e625c SH |
65 | static const char *stats[MAXS] = { |
66 | "rx_packets", | |
67 | "tx_packets", | |
68 | "rx_bytes", | |
69 | "tx_bytes", | |
70 | "rx_errors", | |
71 | "tx_errors", | |
72 | "rx_dropped", | |
73 | "tx_dropped", | |
74 | "multicast", | |
75 | "collisions", | |
76 | "rx_length_errors", | |
77 | "rx_over_errors", | |
78 | "rx_crc_errors", | |
79 | "rx_frame_errors", | |
80 | "rx_fifo_errors", | |
81 | "rx_missed_errors", | |
82 | "tx_aborted_errors", | |
83 | "tx_carrier_errors", | |
84 | "tx_fifo_errors", | |
85 | "tx_heartbeat_errors", | |
86 | "tx_window_errors", | |
87 | "rx_compressed", | |
88 | "tx_compressed" | |
89 | }; | |
90 | ||
aba5acdf SH |
91 | struct ifstat_ent *kern_db; |
92 | struct ifstat_ent *hist_db; | |
93 | ||
50772dc5 | 94 | static int match(const char *id) |
aba5acdf SH |
95 | { |
96 | int i; | |
97 | ||
98 | if (npatterns == 0) | |
99 | return 1; | |
100 | ||
101 | for (i=0; i<npatterns; i++) { | |
102 | if (!fnmatch(patterns[i], id, 0)) | |
103 | return 1; | |
104 | } | |
105 | return 0; | |
106 | } | |
107 | ||
ae665a52 | 108 | static int get_nlmsg(const struct sockaddr_nl *who, |
50772dc5 | 109 | struct nlmsghdr *m, void *arg) |
aba5acdf SH |
110 | { |
111 | struct ifinfomsg *ifi = NLMSG_DATA(m); | |
112 | struct rtattr * tb[IFLA_MAX+1]; | |
113 | int len = m->nlmsg_len; | |
114 | struct ifstat_ent *n; | |
115 | int i; | |
116 | ||
117 | if (m->nlmsg_type != RTM_NEWLINK) | |
118 | return 0; | |
119 | ||
120 | len -= NLMSG_LENGTH(sizeof(*ifi)); | |
121 | if (len < 0) | |
122 | return -1; | |
123 | ||
124 | if (!(ifi->ifi_flags&IFF_UP)) | |
125 | return 0; | |
126 | ||
aba5acdf SH |
127 | parse_rtattr(tb, IFLA_MAX, IFLA_RTA(ifi), len); |
128 | if (tb[IFLA_IFNAME] == NULL || tb[IFLA_STATS] == NULL) | |
129 | return 0; | |
130 | ||
131 | n = malloc(sizeof(*n)); | |
132 | if (!n) | |
133 | abort(); | |
134 | n->ifindex = ifi->ifi_index; | |
135 | n->name = strdup(RTA_DATA(tb[IFLA_IFNAME])); | |
136 | memcpy(&n->ival, RTA_DATA(tb[IFLA_STATS]), sizeof(n->ival)); | |
137 | memset(&n->rate, 0, sizeof(n->rate)); | |
138 | for (i=0; i<MAXS; i++) | |
139 | n->val[i] = n->ival[i]; | |
140 | n->next = kern_db; | |
141 | kern_db = n; | |
142 | return 0; | |
143 | } | |
144 | ||
d1f28cf1 | 145 | static void load_info(void) |
aba5acdf SH |
146 | { |
147 | struct ifstat_ent *db, *n; | |
148 | struct rtnl_handle rth; | |
149 | ||
150 | if (rtnl_open(&rth, 0) < 0) | |
151 | exit(1); | |
152 | ||
153 | if (rtnl_wilddump_request(&rth, AF_INET, RTM_GETLINK) < 0) { | |
154 | perror("Cannot send dump request"); | |
155 | exit(1); | |
156 | } | |
157 | ||
cd70f3f5 | 158 | if (rtnl_dump_filter(&rth, get_nlmsg, NULL) < 0) { |
aba5acdf SH |
159 | fprintf(stderr, "Dump terminated\n"); |
160 | exit(1); | |
161 | } | |
162 | ||
163 | rtnl_close(&rth); | |
164 | ||
165 | db = kern_db; | |
166 | kern_db = NULL; | |
167 | ||
168 | while (db) { | |
169 | n = db; | |
170 | db = db->next; | |
171 | n->next = kern_db; | |
172 | kern_db = n; | |
173 | } | |
174 | } | |
175 | ||
d1f28cf1 | 176 | static void load_raw_table(FILE *fp) |
aba5acdf SH |
177 | { |
178 | char buf[4096]; | |
179 | struct ifstat_ent *db = NULL; | |
180 | struct ifstat_ent *n; | |
181 | ||
182 | while (fgets(buf, sizeof(buf), fp) != NULL) { | |
183 | char *p; | |
184 | char *next; | |
185 | int i; | |
186 | ||
187 | if (buf[0] == '#') { | |
188 | buf[strlen(buf)-1] = 0; | |
189 | if (info_source[0] && strcmp(info_source, buf+1)) | |
190 | source_mismatch = 1; | |
191 | strncpy(info_source, buf+1, sizeof(info_source)-1); | |
192 | continue; | |
193 | } | |
194 | if ((n = malloc(sizeof(*n))) == NULL) | |
195 | abort(); | |
196 | ||
197 | if (!(p = strchr(buf, ' '))) | |
198 | abort(); | |
199 | *p++ = 0; | |
200 | ||
201 | if (sscanf(buf, "%d", &n->ifindex) != 1) | |
202 | abort(); | |
203 | if (!(next = strchr(p, ' '))) | |
204 | abort(); | |
205 | *next++ = 0; | |
206 | ||
207 | n->name = strdup(p); | |
208 | p = next; | |
209 | ||
210 | for (i=0; i<MAXS; i++) { | |
211 | unsigned rate; | |
212 | if (!(next = strchr(p, ' '))) | |
213 | abort(); | |
214 | *next++ = 0; | |
215 | if (sscanf(p, "%llu", n->val+i) != 1) | |
216 | abort(); | |
a571587d | 217 | n->ival[i] = (__u32)n->val[i]; |
aba5acdf SH |
218 | p = next; |
219 | if (!(next = strchr(p, ' '))) | |
220 | abort(); | |
221 | *next++ = 0; | |
222 | if (sscanf(p, "%u", &rate) != 1) | |
223 | abort(); | |
224 | n->rate[i] = rate; | |
225 | p = next; | |
226 | } | |
227 | n->next = db; | |
228 | db = n; | |
229 | } | |
230 | ||
231 | while (db) { | |
232 | n = db; | |
233 | db = db->next; | |
234 | n->next = kern_db; | |
235 | kern_db = n; | |
236 | } | |
237 | } | |
238 | ||
d1f28cf1 | 239 | static void dump_raw_db(FILE *fp, int to_hist) |
aba5acdf SH |
240 | { |
241 | struct ifstat_ent *n, *h; | |
ec3e625c SH |
242 | const char *eol = "\n"; |
243 | ||
aba5acdf | 244 | h = hist_db; |
ec3e625c SH |
245 | if (json_output) |
246 | fprintf(fp, "{ \"%s\":{", info_source); | |
247 | else | |
248 | fprintf(fp, "#%s\n", info_source); | |
aba5acdf SH |
249 | |
250 | for (n=kern_db; n; n=n->next) { | |
251 | int i; | |
252 | unsigned long long *vals = n->val; | |
253 | double *rates = n->rate; | |
254 | if (!match(n->name)) { | |
255 | struct ifstat_ent *h1; | |
256 | if (!to_hist) | |
257 | continue; | |
258 | for (h1 = h; h1; h1 = h1->next) { | |
259 | if (h1->ifindex == n->ifindex) { | |
260 | vals = h1->val; | |
261 | rates = h1->rate; | |
262 | h = h1->next; | |
263 | break; | |
264 | } | |
265 | } | |
266 | } | |
ec3e625c SH |
267 | |
268 | if (json_output) { | |
269 | fprintf(fp, "%s \"%s\":{", | |
270 | eol, n->name); | |
271 | eol = ",\n"; | |
272 | for (i=0; i<MAXS && stats[i]; i++) | |
3d0b7439 | 273 | fprintf(fp, " \"%s\":%llu", |
ec3e625c SH |
274 | stats[i], vals[i]); |
275 | fprintf(fp, "}"); | |
276 | } else { | |
277 | fprintf(fp, "%d %s ", n->ifindex, n->name); | |
278 | for (i=0; i<MAXS; i++) | |
3d0b7439 | 279 | fprintf(fp, "%llu %u ", vals[i], |
ec3e625c SH |
280 | (unsigned)rates[i]); |
281 | fprintf(fp, "\n"); | |
282 | } | |
aba5acdf SH |
283 | } |
284 | } | |
285 | ||
9f3ea250 SH |
286 | /* use communication definitions of meg/kilo etc */ |
287 | static const unsigned long long giga = 1000000000ull; | |
bb6a21a4 SH |
288 | static const unsigned long long mega = 1000000; |
289 | static const unsigned long long kilo = 1000; | |
aba5acdf | 290 | |
ec3e625c SH |
291 | static void format_rate(FILE *fp, const unsigned long long *vals, |
292 | const double *rates, int i) | |
aba5acdf SH |
293 | { |
294 | char temp[64]; | |
ec3e625c | 295 | |
9f3ea250 SH |
296 | if (vals[i] > giga) |
297 | fprintf(fp, "%7lluM ", vals[i]/mega); | |
298 | else if (vals[i] > mega) | |
299 | fprintf(fp, "%7lluK ", vals[i]/kilo); | |
aba5acdf SH |
300 | else |
301 | fprintf(fp, "%8llu ", vals[i]); | |
302 | ||
9f3ea250 SH |
303 | if (rates[i] > mega) { |
304 | sprintf(temp, "%uM", (unsigned)(rates[i]/mega)); | |
aba5acdf | 305 | fprintf(fp, "%-6s ", temp); |
9f3ea250 SH |
306 | } else if (rates[i] > kilo) { |
307 | sprintf(temp, "%uK", (unsigned)(rates[i]/kilo)); | |
aba5acdf SH |
308 | fprintf(fp, "%-6s ", temp); |
309 | } else | |
310 | fprintf(fp, "%-6u ", (unsigned)rates[i]); | |
311 | } | |
312 | ||
ec3e625c | 313 | static void format_pair(FILE *fp, const unsigned long long *vals, int i, int k) |
aba5acdf SH |
314 | { |
315 | char temp[64]; | |
9f3ea250 SH |
316 | if (vals[i] > giga) |
317 | fprintf(fp, "%7lluM ", vals[i]/mega); | |
318 | else if (vals[i] > mega) | |
319 | fprintf(fp, "%7lluK ", vals[i]/kilo); | |
aba5acdf SH |
320 | else |
321 | fprintf(fp, "%8llu ", vals[i]); | |
322 | ||
9f3ea250 SH |
323 | if (vals[k] > giga) { |
324 | sprintf(temp, "%uM", (unsigned)(vals[k]/mega)); | |
aba5acdf | 325 | fprintf(fp, "%-6s ", temp); |
9f3ea250 SH |
326 | } else if (vals[k] > mega) { |
327 | sprintf(temp, "%uK", (unsigned)(vals[k]/kilo)); | |
aba5acdf SH |
328 | fprintf(fp, "%-6s ", temp); |
329 | } else | |
330 | fprintf(fp, "%-6u ", (unsigned)vals[k]); | |
331 | } | |
332 | ||
d1f28cf1 | 333 | static void print_head(FILE *fp) |
aba5acdf SH |
334 | { |
335 | fprintf(fp, "#%s\n", info_source); | |
336 | fprintf(fp, "%-15s ", "Interface"); | |
337 | ||
338 | fprintf(fp, "%8s/%-6s ", "RX Pkts", "Rate"); | |
339 | fprintf(fp, "%8s/%-6s ", "TX Pkts", "Rate"); | |
340 | fprintf(fp, "%8s/%-6s ", "RX Data", "Rate"); | |
341 | fprintf(fp, "%8s/%-6s\n","TX Data", "Rate"); | |
342 | ||
343 | if (!show_errors) { | |
344 | fprintf(fp, "%-15s ", ""); | |
345 | fprintf(fp, "%8s/%-6s ", "RX Errs", "Drop"); | |
346 | fprintf(fp, "%8s/%-6s ", "TX Errs", "Drop"); | |
347 | fprintf(fp, "%8s/%-6s ", "RX Over", "Rate"); | |
348 | fprintf(fp, "%8s/%-6s\n","TX Coll", "Rate"); | |
349 | } else { | |
350 | fprintf(fp, "%-15s ", ""); | |
351 | fprintf(fp, "%8s/%-6s ", "RX Errs", "Rate"); | |
352 | fprintf(fp, "%8s/%-6s ", "RX Drop", "Rate"); | |
353 | fprintf(fp, "%8s/%-6s ", "RX Over", "Rate"); | |
354 | fprintf(fp, "%8s/%-6s\n","RX Leng", "Rate"); | |
355 | ||
356 | fprintf(fp, "%-15s ", ""); | |
357 | fprintf(fp, "%8s/%-6s ", "RX Crc", "Rate"); | |
358 | fprintf(fp, "%8s/%-6s ", "RX Frm", "Rate"); | |
359 | fprintf(fp, "%8s/%-6s ", "RX Fifo", "Rate"); | |
360 | fprintf(fp, "%8s/%-6s\n","RX Miss", "Rate"); | |
361 | ||
362 | fprintf(fp, "%-15s ", ""); | |
363 | fprintf(fp, "%8s/%-6s ", "TX Errs", "Rate"); | |
364 | fprintf(fp, "%8s/%-6s ", "TX Drop", "Rate"); | |
365 | fprintf(fp, "%8s/%-6s ", "TX Coll", "Rate"); | |
366 | fprintf(fp, "%8s/%-6s\n","TX Carr", "Rate"); | |
367 | ||
368 | fprintf(fp, "%-15s ", ""); | |
369 | fprintf(fp, "%8s/%-6s ", "TX Abrt", "Rate"); | |
370 | fprintf(fp, "%8s/%-6s ", "TX Fifo", "Rate"); | |
371 | fprintf(fp, "%8s/%-6s ", "TX Hear", "Rate"); | |
372 | fprintf(fp, "%8s/%-6s\n","TX Wind", "Rate"); | |
373 | } | |
374 | } | |
375 | ||
ec3e625c SH |
376 | static void print_one_json(FILE *fp, const struct ifstat_ent *n, |
377 | const unsigned long long *vals) | |
378 | { | |
379 | int i, m; | |
380 | const char *sep = " "; | |
3d0b7439 | 381 | |
ec3e625c SH |
382 | m = show_errors ? 20 : 10; |
383 | fprintf(fp, " \"%s\":{", n->name); | |
384 | for (i=0; i < m && stats[i]; i++) { | |
3d0b7439 | 385 | fprintf(fp, "%s\"%s\":%llu", |
ec3e625c SH |
386 | sep, stats[i], vals[i]); |
387 | sep = ", "; | |
388 | } | |
389 | fprintf(fp, " }"); | |
390 | } | |
391 | ||
392 | static void print_one_if(FILE *fp, const struct ifstat_ent *n, | |
393 | const unsigned long long *vals) | |
aba5acdf SH |
394 | { |
395 | int i; | |
ec3e625c | 396 | |
aba5acdf SH |
397 | fprintf(fp, "%-15s ", n->name); |
398 | for (i=0; i<4; i++) | |
399 | format_rate(fp, vals, n->rate, i); | |
400 | fprintf(fp, "\n"); | |
401 | ||
402 | if (!show_errors) { | |
403 | fprintf(fp, "%-15s ", ""); | |
404 | format_pair(fp, vals, 4, 6); | |
405 | format_pair(fp, vals, 5, 7); | |
406 | format_rate(fp, vals, n->rate, 11); | |
407 | format_rate(fp, vals, n->rate, 9); | |
408 | fprintf(fp, "\n"); | |
409 | } else { | |
410 | fprintf(fp, "%-15s ", ""); | |
411 | format_rate(fp, vals, n->rate, 4); | |
412 | format_rate(fp, vals, n->rate, 6); | |
413 | format_rate(fp, vals, n->rate, 11); | |
414 | format_rate(fp, vals, n->rate, 10); | |
415 | fprintf(fp, "\n"); | |
416 | ||
417 | fprintf(fp, "%-15s ", ""); | |
418 | format_rate(fp, vals, n->rate, 12); | |
419 | format_rate(fp, vals, n->rate, 13); | |
420 | format_rate(fp, vals, n->rate, 14); | |
421 | format_rate(fp, vals, n->rate, 15); | |
422 | fprintf(fp, "\n"); | |
423 | ||
424 | fprintf(fp, "%-15s ", ""); | |
425 | format_rate(fp, vals, n->rate, 5); | |
426 | format_rate(fp, vals, n->rate, 7); | |
427 | format_rate(fp, vals, n->rate, 9); | |
428 | format_rate(fp, vals, n->rate, 17); | |
429 | fprintf(fp, "\n"); | |
430 | ||
431 | fprintf(fp, "%-15s ", ""); | |
432 | format_rate(fp, vals, n->rate, 16); | |
433 | format_rate(fp, vals, n->rate, 18); | |
434 | format_rate(fp, vals, n->rate, 19); | |
435 | format_rate(fp, vals, n->rate, 20); | |
436 | fprintf(fp, "\n"); | |
437 | } | |
438 | } | |
439 | ||
d1f28cf1 | 440 | static void dump_kern_db(FILE *fp) |
aba5acdf | 441 | { |
dc484542 | 442 | struct ifstat_ent *n; |
ec3e625c | 443 | const char *eol = "\n"; |
aba5acdf | 444 | |
ec3e625c SH |
445 | if (json_output) |
446 | fprintf(fp, "{ \"%s\": {", info_source); | |
447 | else | |
448 | print_head(fp); | |
aba5acdf SH |
449 | |
450 | for (n=kern_db; n; n=n->next) { | |
451 | if (!match(n->name)) | |
452 | continue; | |
ec3e625c SH |
453 | |
454 | if (json_output) { | |
455 | fprintf(fp, "%s", eol); | |
456 | eol = ",\n"; | |
457 | print_one_json(fp, n, n->val); | |
458 | } else | |
459 | print_one_if(fp, n, n->val); | |
aba5acdf | 460 | } |
ec3e625c SH |
461 | if (json_output) |
462 | fprintf(fp, "\n} }\n"); | |
aba5acdf SH |
463 | } |
464 | ||
465 | ||
d1f28cf1 | 466 | static void dump_incr_db(FILE *fp) |
aba5acdf SH |
467 | { |
468 | struct ifstat_ent *n, *h; | |
ec3e625c | 469 | const char *eol = "\n"; |
aba5acdf | 470 | |
ec3e625c SH |
471 | h = hist_db; |
472 | if (json_output) | |
473 | fprintf(fp, "{ \"%s\":{", info_source); | |
474 | else | |
475 | print_head(fp); | |
aba5acdf SH |
476 | |
477 | for (n=kern_db; n; n=n->next) { | |
478 | int i; | |
479 | unsigned long long vals[MAXS]; | |
480 | struct ifstat_ent *h1; | |
481 | ||
482 | memcpy(vals, n->val, sizeof(vals)); | |
483 | ||
484 | for (h1 = h; h1; h1 = h1->next) { | |
485 | if (h1->ifindex == n->ifindex) { | |
486 | for (i = 0; i < MAXS; i++) | |
487 | vals[i] -= h1->val[i]; | |
488 | h = h1->next; | |
489 | break; | |
490 | } | |
491 | } | |
492 | if (!match(n->name)) | |
493 | continue; | |
ec3e625c SH |
494 | |
495 | if (json_output) { | |
496 | fprintf(fp, "%s", eol); | |
497 | eol = ",\n"; | |
498 | print_one_json(fp, n, n->val); | |
499 | } else | |
500 | print_one_if(fp, n, vals); | |
aba5acdf | 501 | } |
ec3e625c SH |
502 | if (json_output) |
503 | fprintf(fp, "\n} }\n"); | |
aba5acdf SH |
504 | } |
505 | ||
506 | ||
507 | static int children; | |
508 | ||
d1f28cf1 | 509 | static void sigchild(int signo) |
aba5acdf SH |
510 | { |
511 | } | |
512 | ||
d1f28cf1 | 513 | static void update_db(int interval) |
aba5acdf SH |
514 | { |
515 | struct ifstat_ent *n, *h; | |
516 | ||
517 | n = kern_db; | |
518 | kern_db = NULL; | |
519 | ||
520 | load_info(); | |
521 | ||
522 | h = kern_db; | |
523 | kern_db = n; | |
524 | ||
525 | for (n = kern_db; n; n = n->next) { | |
526 | struct ifstat_ent *h1; | |
527 | for (h1 = h; h1; h1 = h1->next) { | |
528 | if (h1->ifindex == n->ifindex) { | |
529 | int i; | |
530 | for (i = 0; i < MAXS; i++) { | |
531 | if ((long)(h1->ival[i] - n->ival[i]) < 0) { | |
ae665a52 | 532 | memset(n->ival, 0, sizeof(n->ival)); |
aba5acdf SH |
533 | break; |
534 | } | |
535 | } | |
ae665a52 | 536 | for (i = 0; i < MAXS; i++) { |
aba5acdf SH |
537 | double sample; |
538 | unsigned long incr = h1->ival[i] - n->ival[i]; | |
539 | n->val[i] += incr; | |
540 | n->ival[i] = h1->ival[i]; | |
541 | sample = (double)(incr*1000)/interval; | |
542 | if (interval >= scan_interval) { | |
543 | n->rate[i] += W*(sample-n->rate[i]); | |
544 | } else if (interval >= 1000) { | |
545 | if (interval >= time_constant) { | |
546 | n->rate[i] = sample; | |
547 | } else { | |
548 | double w = W*(double)interval/scan_interval; | |
549 | n->rate[i] += w*(sample-n->rate[i]); | |
550 | } | |
551 | } | |
552 | } | |
553 | ||
554 | while (h != h1) { | |
555 | struct ifstat_ent *tmp = h; | |
556 | h = h->next; | |
557 | free(tmp->name); | |
558 | free(tmp); | |
559 | }; | |
560 | h = h1->next; | |
561 | free(h1->name); | |
562 | free(h1); | |
563 | break; | |
564 | } | |
565 | } | |
566 | } | |
567 | } | |
568 | ||
569 | #define T_DIFF(a,b) (((a).tv_sec-(b).tv_sec)*1000 + ((a).tv_usec-(b).tv_usec)/1000) | |
570 | ||
571 | ||
d1f28cf1 | 572 | static void server_loop(int fd) |
aba5acdf | 573 | { |
737f15f6 | 574 | struct timeval snaptime = { 0 }; |
aba5acdf SH |
575 | struct pollfd p; |
576 | p.fd = fd; | |
577 | p.events = p.revents = POLLIN; | |
578 | ||
579 | sprintf(info_source, "%d.%lu sampling_interval=%d time_const=%d", | |
580 | getpid(), (unsigned long)random(), scan_interval/1000, time_constant/1000); | |
581 | ||
582 | load_info(); | |
583 | ||
584 | for (;;) { | |
585 | int status; | |
586 | int tdiff; | |
587 | struct timeval now; | |
737f15f6 | 588 | |
aba5acdf SH |
589 | gettimeofday(&now, NULL); |
590 | tdiff = T_DIFF(now, snaptime); | |
591 | if (tdiff >= scan_interval) { | |
592 | update_db(tdiff); | |
593 | snaptime = now; | |
594 | tdiff = 0; | |
595 | } | |
737f15f6 | 596 | |
aba5acdf SH |
597 | if (poll(&p, 1, tdiff + scan_interval) > 0 |
598 | && (p.revents&POLLIN)) { | |
599 | int clnt = accept(fd, NULL, NULL); | |
600 | if (clnt >= 0) { | |
601 | pid_t pid; | |
602 | if (children >= 5) { | |
603 | close(clnt); | |
604 | } else if ((pid = fork()) != 0) { | |
605 | if (pid>0) | |
606 | children++; | |
607 | close(clnt); | |
608 | } else { | |
609 | FILE *fp = fdopen(clnt, "w"); | |
610 | if (fp) { | |
611 | if (tdiff > 0) | |
612 | update_db(tdiff); | |
613 | dump_raw_db(fp, 0); | |
614 | } | |
615 | exit(0); | |
616 | } | |
617 | } | |
618 | } | |
619 | while (children && waitpid(-1, &status, WNOHANG) > 0) | |
620 | children--; | |
621 | } | |
622 | } | |
623 | ||
d1f28cf1 | 624 | static int verify_forging(int fd) |
aba5acdf SH |
625 | { |
626 | struct ucred cred; | |
737f15f6 SH |
627 | socklen_t olen = sizeof(cred); |
628 | ||
aba5acdf SH |
629 | if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, (void*)&cred, &olen) || |
630 | olen < sizeof(cred)) | |
631 | return -1; | |
632 | if (cred.uid == getuid() || cred.uid == 0) | |
633 | return 0; | |
634 | return -1; | |
635 | } | |
636 | ||
d7e0809e SH |
637 | static void usage(void) __attribute__((noreturn)); |
638 | ||
aba5acdf SH |
639 | static void usage(void) |
640 | { | |
d7e0809e SH |
641 | fprintf(stderr, |
642 | "Usage: ifstat [OPTION] [ PATTERN [ PATTERN ] ]\n" | |
643 | " -h, --help this message\n" | |
644 | " -a, --ignore ignore history\n" | |
645 | " -d, --scan=SECS sample every statistics every SECS\n" | |
646 | " -e, --errors show errors\n" | |
ec3e625c | 647 | " -j, --json format output in JSON\n" |
d7e0809e SH |
648 | " -n, --nooutput do history only\n" |
649 | " -r, --reset reset history\n" | |
ec3e625c | 650 | " -s, --noupdate don\'t update history\n" |
d7e0809e SH |
651 | " -t, --interval=SECS report average over the last SECS\n" |
652 | " -V, --version output version information\n" | |
d7e0809e SH |
653 | " -z, --zeros show entries with zero activity\n"); |
654 | ||
655 | exit(-1); | |
aba5acdf SH |
656 | } |
657 | ||
9f3ea250 SH |
658 | static const struct option longopts[] = { |
659 | { "help", 0, 0, 'h' }, | |
660 | { "ignore", 0, 0, 'a' }, | |
661 | { "scan", 1, 0, 'd'}, | |
662 | { "errors", 0, 0, 'e' }, | |
663 | { "nooutput", 0, 0, 'n' }, | |
ec3e625c | 664 | { "json", 0, 0, 'j' }, |
9f3ea250 SH |
665 | { "reset", 0, 0, 'r' }, |
666 | { "noupdate", 0, 0, 's' }, | |
667 | { "interval", 1, 0, 't' }, | |
668 | { "version", 0, 0, 'V' }, | |
669 | { "zeros", 0, 0, 'z' }, | |
9f3ea250 SH |
670 | { 0 } |
671 | }; | |
aba5acdf SH |
672 | |
673 | int main(int argc, char *argv[]) | |
674 | { | |
675 | char hist_name[128]; | |
676 | struct sockaddr_un sun; | |
677 | FILE *hist_fp = NULL; | |
678 | int ch; | |
679 | int fd; | |
680 | ||
ec3e625c | 681 | while ((ch = getopt_long(argc, argv, "hjvVzrnasd:t:e", |
9f3ea250 | 682 | longopts, NULL)) != EOF) { |
aba5acdf SH |
683 | switch(ch) { |
684 | case 'z': | |
685 | dump_zeros = 1; | |
686 | break; | |
687 | case 'r': | |
688 | reset_history = 1; | |
689 | break; | |
690 | case 'a': | |
691 | ignore_history = 1; | |
692 | break; | |
693 | case 's': | |
694 | no_update = 1; | |
695 | break; | |
696 | case 'n': | |
697 | no_output = 1; | |
698 | break; | |
699 | case 'e': | |
700 | show_errors = 1; | |
701 | break; | |
ec3e625c SH |
702 | case 'j': |
703 | json_output = 1; | |
704 | break; | |
aba5acdf | 705 | case 'd': |
9f3ea250 SH |
706 | scan_interval = atoi(optarg) * 1000; |
707 | if (scan_interval <= 0) { | |
708 | fprintf(stderr, "ifstat: invalid scan interval\n"); | |
709 | exit(-1); | |
710 | } | |
aba5acdf SH |
711 | break; |
712 | case 't': | |
9f3ea250 SH |
713 | time_constant = atoi(optarg); |
714 | if (time_constant <= 0) { | |
aba5acdf SH |
715 | fprintf(stderr, "ifstat: invalid time constant divisor\n"); |
716 | exit(-1); | |
717 | } | |
718 | break; | |
719 | case 'v': | |
720 | case 'V': | |
721 | printf("ifstat utility, iproute2-ss%s\n", SNAPSHOT); | |
722 | exit(0); | |
723 | case 'h': | |
724 | case '?': | |
725 | default: | |
726 | usage(); | |
727 | } | |
728 | } | |
729 | ||
730 | argc -= optind; | |
731 | argv += optind; | |
732 | ||
733 | sun.sun_family = AF_UNIX; | |
734 | sun.sun_path[0] = 0; | |
735 | sprintf(sun.sun_path+1, "ifstat%d", getuid()); | |
736 | ||
737 | if (scan_interval > 0) { | |
738 | if (time_constant == 0) | |
739 | time_constant = 60; | |
740 | time_constant *= 1000; | |
741 | W = 1 - 1/exp(log(10)*(double)scan_interval/time_constant); | |
742 | if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) { | |
743 | perror("ifstat: socket"); | |
744 | exit(-1); | |
745 | } | |
746 | if (bind(fd, (struct sockaddr*)&sun, 2+1+strlen(sun.sun_path+1)) < 0) { | |
747 | perror("ifstat: bind"); | |
748 | exit(-1); | |
749 | } | |
750 | if (listen(fd, 5) < 0) { | |
751 | perror("ifstat: listen"); | |
752 | exit(-1); | |
753 | } | |
a7a9ddbb MF |
754 | if (daemon(0, 0)) { |
755 | perror("ifstat: daemon"); | |
756 | exit(-1); | |
757 | } | |
aba5acdf SH |
758 | signal(SIGPIPE, SIG_IGN); |
759 | signal(SIGCHLD, sigchild); | |
760 | server_loop(fd); | |
761 | exit(0); | |
762 | } | |
763 | ||
764 | patterns = argv; | |
765 | npatterns = argc; | |
766 | ||
767 | if (getenv("IFSTAT_HISTORY")) | |
daf7bd5c SH |
768 | snprintf(hist_name, sizeof(hist_name), |
769 | "%s", getenv("IFSTAT_HISTORY")); | |
aba5acdf | 770 | else |
daf7bd5c SH |
771 | snprintf(hist_name, sizeof(hist_name), |
772 | "%s/.ifstat.u%d", P_tmpdir, getuid()); | |
aba5acdf SH |
773 | |
774 | if (reset_history) | |
775 | unlink(hist_name); | |
776 | ||
777 | if (!ignore_history || !no_update) { | |
778 | struct stat stb; | |
779 | ||
780 | fd = open(hist_name, O_RDWR|O_CREAT|O_NOFOLLOW, 0600); | |
781 | if (fd < 0) { | |
782 | perror("ifstat: open history file"); | |
783 | exit(-1); | |
784 | } | |
785 | if ((hist_fp = fdopen(fd, "r+")) == NULL) { | |
786 | perror("ifstat: fdopen history file"); | |
787 | exit(-1); | |
788 | } | |
789 | if (flock(fileno(hist_fp), LOCK_EX)) { | |
790 | perror("ifstat: flock history file"); | |
791 | exit(-1); | |
792 | } | |
793 | if (fstat(fileno(hist_fp), &stb) != 0) { | |
794 | perror("ifstat: fstat history file"); | |
795 | exit(-1); | |
796 | } | |
797 | if (stb.st_nlink != 1 || stb.st_uid != getuid()) { | |
798 | fprintf(stderr, "ifstat: something is so wrong with history file, that I prefer not to proceed.\n"); | |
799 | exit(-1); | |
800 | } | |
801 | if (!ignore_history) { | |
802 | FILE *tfp; | |
9a230771 | 803 | long uptime = -1; |
aba5acdf SH |
804 | if ((tfp = fopen("/proc/uptime", "r")) != NULL) { |
805 | if (fscanf(tfp, "%ld", &uptime) != 1) | |
806 | uptime = -1; | |
807 | fclose(tfp); | |
808 | } | |
809 | if (uptime >= 0 && time(NULL) >= stb.st_mtime+uptime) { | |
810 | fprintf(stderr, "ifstat: history is aged out, resetting\n"); | |
811 | ftruncate(fileno(hist_fp), 0); | |
812 | } | |
813 | } | |
814 | ||
815 | load_raw_table(hist_fp); | |
816 | ||
817 | hist_db = kern_db; | |
818 | kern_db = NULL; | |
819 | } | |
820 | ||
821 | if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) >= 0 && | |
822 | (connect(fd, (struct sockaddr*)&sun, 2+1+strlen(sun.sun_path+1)) == 0 | |
823 | || (strcpy(sun.sun_path+1, "ifstat0"), | |
824 | connect(fd, (struct sockaddr*)&sun, 2+1+strlen(sun.sun_path+1)) == 0)) | |
825 | && verify_forging(fd) == 0) { | |
826 | FILE *sfp = fdopen(fd, "r"); | |
827 | load_raw_table(sfp); | |
828 | if (hist_db && source_mismatch) { | |
829 | fprintf(stderr, "ifstat: history is stale, ignoring it.\n"); | |
830 | hist_db = NULL; | |
831 | } | |
832 | fclose(sfp); | |
833 | } else { | |
834 | if (fd >= 0) | |
835 | close(fd); | |
836 | if (hist_db && info_source[0] && strcmp(info_source, "kernel")) { | |
837 | fprintf(stderr, "ifstat: history is stale, ignoring it.\n"); | |
838 | hist_db = NULL; | |
839 | info_source[0] = 0; | |
840 | } | |
841 | load_info(); | |
842 | if (info_source[0] == 0) | |
843 | strcpy(info_source, "kernel"); | |
844 | } | |
845 | ||
846 | if (!no_output) { | |
847 | if (ignore_history || hist_db == NULL) | |
848 | dump_kern_db(stdout); | |
849 | else | |
850 | dump_incr_db(stdout); | |
851 | } | |
ec3e625c | 852 | |
aba5acdf SH |
853 | if (!no_update) { |
854 | ftruncate(fileno(hist_fp), 0); | |
855 | rewind(hist_fp); | |
ec3e625c SH |
856 | |
857 | json_output = 0; | |
aba5acdf | 858 | dump_raw_db(hist_fp, 1); |
ec3e625c | 859 | fclose(hist_fp); |
aba5acdf SH |
860 | } |
861 | exit(0); | |
862 | } |