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Commit | Line | Data |
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aba5acdf SH |
1 | /* |
2 | * nstat.c handy utility to read counters /proc/net/netstat and snmp | |
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> | |
404582c8 | 29 | #include <getopt.h> |
aba5acdf | 30 | |
fcc16c22 | 31 | #include <json_writer.h> |
aba5acdf | 32 | #include <SNAPSHOT.h> |
62000e51 | 33 | #include "utils.h" |
aba5acdf | 34 | |
acd1e437 SH |
35 | int dump_zeros; |
36 | int reset_history; | |
37 | int ignore_history; | |
38 | int no_output; | |
39 | int json_output; | |
acd1e437 SH |
40 | int no_update; |
41 | int scan_interval; | |
42 | int time_constant; | |
aba5acdf SH |
43 | double W; |
44 | char **patterns; | |
45 | int npatterns; | |
46 | ||
47 | char info_source[128]; | |
48 | int source_mismatch; | |
49 | ||
4ffc44ca | 50 | static int generic_proc_open(const char *env, char *name) |
aba5acdf SH |
51 | { |
52 | char store[128]; | |
53 | char *p = getenv(env); | |
acd1e437 | 54 | |
aba5acdf SH |
55 | if (!p) { |
56 | p = getenv("PROC_ROOT") ? : "/proc"; | |
57 | snprintf(store, sizeof(store)-1, "%s/%s", p, name); | |
58 | p = store; | |
59 | } | |
4ffc44ca | 60 | return open(p, O_RDONLY); |
aba5acdf SH |
61 | } |
62 | ||
d1f28cf1 | 63 | static int net_netstat_open(void) |
aba5acdf SH |
64 | { |
65 | return generic_proc_open("PROC_NET_NETSTAT", "net/netstat"); | |
66 | } | |
67 | ||
d1f28cf1 | 68 | static int net_snmp_open(void) |
aba5acdf SH |
69 | { |
70 | return generic_proc_open("PROC_NET_SNMP", "net/snmp"); | |
71 | } | |
72 | ||
d1f28cf1 | 73 | static int net_snmp6_open(void) |
aba5acdf SH |
74 | { |
75 | return generic_proc_open("PROC_NET_SNMP6", "net/snmp6"); | |
76 | } | |
77 | ||
45a0dc16 HL |
78 | static int net_sctp_snmp_open(void) |
79 | { | |
80 | return generic_proc_open("PROC_NET_SCTP_SNMP", "net/sctp/snmp"); | |
81 | } | |
82 | ||
acd1e437 | 83 | struct nstat_ent { |
aba5acdf SH |
84 | struct nstat_ent *next; |
85 | char *id; | |
86 | unsigned long long val; | |
aba5acdf SH |
87 | double rate; |
88 | }; | |
89 | ||
90 | struct nstat_ent *kern_db; | |
91 | struct nstat_ent *hist_db; | |
92 | ||
d1f28cf1 SH |
93 | static const char *useless_numbers[] = { |
94 | "IpForwarding", "IpDefaultTTL", | |
95 | "TcpRtoAlgorithm", "TcpRtoMin", "TcpRtoMax", | |
96 | "TcpMaxConn", "TcpCurrEstab" | |
aba5acdf SH |
97 | }; |
98 | ||
d1f28cf1 | 99 | static int useless_number(const char *id) |
aba5acdf SH |
100 | { |
101 | int i; | |
acd1e437 | 102 | |
62000e51 | 103 | for (i = 0; i < ARRAY_SIZE(useless_numbers); i++) |
aba5acdf SH |
104 | if (strcmp(id, useless_numbers[i]) == 0) |
105 | return 1; | |
106 | return 0; | |
107 | } | |
108 | ||
d1f28cf1 | 109 | static int match(const char *id) |
aba5acdf SH |
110 | { |
111 | int i; | |
112 | ||
113 | if (npatterns == 0) | |
114 | return 1; | |
115 | ||
acd1e437 | 116 | for (i = 0; i < npatterns; i++) { |
aba5acdf SH |
117 | if (!fnmatch(patterns[i], id, 0)) |
118 | return 1; | |
119 | } | |
120 | return 0; | |
121 | } | |
122 | ||
d1f28cf1 | 123 | static void load_good_table(FILE *fp) |
aba5acdf SH |
124 | { |
125 | char buf[4096]; | |
126 | struct nstat_ent *db = NULL; | |
127 | struct nstat_ent *n; | |
128 | ||
129 | while (fgets(buf, sizeof(buf), fp) != NULL) { | |
130 | int nr; | |
131 | unsigned long long val; | |
132 | double rate; | |
b482ffa6 | 133 | char idbuf[sizeof(buf)]; |
acd1e437 | 134 | |
aba5acdf SH |
135 | if (buf[0] == '#') { |
136 | buf[strlen(buf)-1] = 0; | |
137 | if (info_source[0] && strcmp(info_source, buf+1)) | |
138 | source_mismatch = 1; | |
b482ffa6 | 139 | info_source[0] = 0; |
140 | strncat(info_source, buf+1, sizeof(info_source)-1); | |
aba5acdf SH |
141 | continue; |
142 | } | |
b482ffa6 | 143 | /* idbuf is as big as buf, so this is safe */ |
aba5acdf SH |
144 | nr = sscanf(buf, "%s%llu%lg", idbuf, &val, &rate); |
145 | if (nr < 2) | |
146 | abort(); | |
147 | if (nr < 3) | |
148 | rate = 0; | |
149 | if (useless_number(idbuf)) | |
150 | continue; | |
151 | if ((n = malloc(sizeof(*n))) == NULL) | |
152 | abort(); | |
153 | n->id = strdup(idbuf); | |
aba5acdf SH |
154 | n->val = val; |
155 | n->rate = rate; | |
156 | n->next = db; | |
157 | db = n; | |
158 | } | |
159 | ||
160 | while (db) { | |
161 | n = db; | |
162 | db = db->next; | |
163 | n->next = kern_db; | |
164 | kern_db = n; | |
165 | } | |
166 | } | |
167 | ||
d4717914 ED |
168 | static int count_spaces(const char *line) |
169 | { | |
170 | int count = 0; | |
171 | char c; | |
172 | ||
173 | while ((c = *line++) != 0) | |
174 | count += c == ' ' || c == '\n'; | |
175 | return count; | |
176 | } | |
aba5acdf | 177 | |
d1f28cf1 | 178 | static void load_ugly_table(FILE *fp) |
aba5acdf | 179 | { |
72cdb77d ED |
180 | char *buf = NULL; |
181 | size_t buflen = 0; | |
182 | ssize_t nread; | |
aba5acdf SH |
183 | struct nstat_ent *db = NULL; |
184 | struct nstat_ent *n; | |
185 | ||
72cdb77d | 186 | while ((nread = getline(&buf, &buflen, fp)) != -1) { |
da8034a0 | 187 | char idbuf[4096]; |
aba5acdf SH |
188 | int off; |
189 | char *p; | |
d4717914 | 190 | int count1, count2, skip = 0; |
aba5acdf SH |
191 | |
192 | p = strchr(buf, ':'); | |
193 | if (!p) | |
194 | abort(); | |
d4717914 | 195 | count1 = count_spaces(buf); |
aba5acdf | 196 | *p = 0; |
b482ffa6 | 197 | idbuf[0] = 0; |
198 | strncat(idbuf, buf, sizeof(idbuf) - 1); | |
199 | off = p - buf; | |
aba5acdf SH |
200 | p += 2; |
201 | ||
202 | while (*p) { | |
203 | char *next; | |
acd1e437 | 204 | |
aba5acdf SH |
205 | if ((next = strchr(p, ' ')) != NULL) |
206 | *next++ = 0; | |
207 | else if ((next = strchr(p, '\n')) != NULL) | |
208 | *next++ = 0; | |
b482ffa6 | 209 | if (off < sizeof(idbuf)) { |
210 | idbuf[off] = 0; | |
211 | strncat(idbuf, p, sizeof(idbuf) - off - 1); | |
212 | } | |
aba5acdf SH |
213 | n = malloc(sizeof(*n)); |
214 | if (!n) | |
215 | abort(); | |
216 | n->id = strdup(idbuf); | |
217 | n->rate = 0; | |
218 | n->next = db; | |
219 | db = n; | |
220 | p = next; | |
221 | } | |
222 | n = db; | |
72cdb77d ED |
223 | nread = getline(&buf, &buflen, fp); |
224 | if (nread == -1) | |
aba5acdf | 225 | abort(); |
d4717914 ED |
226 | count2 = count_spaces(buf); |
227 | if (count2 > count1) | |
228 | skip = count2 - count1; | |
aba5acdf SH |
229 | do { |
230 | p = strrchr(buf, ' '); | |
231 | if (!p) | |
232 | abort(); | |
233 | *p = 0; | |
cdb2227e | 234 | if (sscanf(p+1, "%llu", &n->val) != 1) |
aba5acdf | 235 | abort(); |
aba5acdf | 236 | /* Trick to skip "dummy" trailing ICMP MIB in 2.4 */ |
d4717914 ED |
237 | if (skip) |
238 | skip--; | |
aba5acdf SH |
239 | else |
240 | n = n->next; | |
241 | } while (p > buf + off + 2); | |
242 | } | |
72cdb77d | 243 | free(buf); |
aba5acdf SH |
244 | |
245 | while (db) { | |
246 | n = db; | |
247 | db = db->next; | |
248 | if (useless_number(n->id)) { | |
249 | free(n->id); | |
250 | free(n); | |
251 | } else { | |
252 | n->next = kern_db; | |
253 | kern_db = n; | |
254 | } | |
255 | } | |
256 | } | |
257 | ||
45a0dc16 HL |
258 | static void load_sctp_snmp(void) |
259 | { | |
260 | FILE *fp = fdopen(net_sctp_snmp_open(), "r"); | |
261 | ||
262 | if (fp) { | |
263 | load_good_table(fp); | |
264 | fclose(fp); | |
265 | } | |
266 | } | |
267 | ||
d1f28cf1 | 268 | static void load_snmp(void) |
aba5acdf SH |
269 | { |
270 | FILE *fp = fdopen(net_snmp_open(), "r"); | |
acd1e437 | 271 | |
aba5acdf SH |
272 | if (fp) { |
273 | load_ugly_table(fp); | |
274 | fclose(fp); | |
275 | } | |
276 | } | |
277 | ||
d1f28cf1 | 278 | static void load_snmp6(void) |
aba5acdf SH |
279 | { |
280 | FILE *fp = fdopen(net_snmp6_open(), "r"); | |
acd1e437 | 281 | |
aba5acdf SH |
282 | if (fp) { |
283 | load_good_table(fp); | |
284 | fclose(fp); | |
285 | } | |
286 | } | |
287 | ||
d1f28cf1 | 288 | static void load_netstat(void) |
aba5acdf SH |
289 | { |
290 | FILE *fp = fdopen(net_netstat_open(), "r"); | |
acd1e437 | 291 | |
aba5acdf SH |
292 | if (fp) { |
293 | load_ugly_table(fp); | |
294 | fclose(fp); | |
295 | } | |
296 | } | |
297 | ||
d48ed3f4 | 298 | |
d1f28cf1 | 299 | static void dump_kern_db(FILE *fp, int to_hist) |
aba5acdf | 300 | { |
fcc16c22 | 301 | json_writer_t *jw = json_output ? jsonw_new(fp) : NULL; |
aba5acdf | 302 | struct nstat_ent *n, *h; |
d48ed3f4 | 303 | |
aba5acdf | 304 | h = hist_db; |
fcc16c22 | 305 | if (jw) { |
d721a145 | 306 | jsonw_start_object(jw); |
fcc16c22 SH |
307 | jsonw_pretty(jw, pretty); |
308 | jsonw_name(jw, info_source); | |
309 | jsonw_start_object(jw); | |
310 | } else | |
d48ed3f4 | 311 | fprintf(fp, "#%s\n", info_source); |
404582c8 | 312 | |
acd1e437 | 313 | for (n = kern_db; n; n = n->next) { |
aba5acdf | 314 | unsigned long long val = n->val; |
acd1e437 | 315 | |
aba5acdf SH |
316 | if (!dump_zeros && !val && !n->rate) |
317 | continue; | |
318 | if (!match(n->id)) { | |
319 | struct nstat_ent *h1; | |
acd1e437 | 320 | |
aba5acdf SH |
321 | if (!to_hist) |
322 | continue; | |
323 | for (h1 = h; h1; h1 = h1->next) { | |
324 | if (strcmp(h1->id, n->id) == 0) { | |
325 | val = h1->val; | |
326 | h = h1->next; | |
327 | break; | |
328 | } | |
329 | } | |
330 | } | |
d48ed3f4 | 331 | |
fcc16c22 SH |
332 | if (jw) |
333 | jsonw_uint_field(jw, n->id, val); | |
334 | else | |
d48ed3f4 | 335 | fprintf(fp, "%-32s%-16llu%6.1f\n", n->id, val, n->rate); |
aba5acdf | 336 | } |
fcc16c22 SH |
337 | |
338 | if (jw) { | |
d721a145 AK |
339 | jsonw_end_object(jw); |
340 | ||
fcc16c22 SH |
341 | jsonw_end_object(jw); |
342 | jsonw_destroy(&jw); | |
343 | } | |
aba5acdf SH |
344 | } |
345 | ||
d1f28cf1 | 346 | static void dump_incr_db(FILE *fp) |
aba5acdf | 347 | { |
fcc16c22 | 348 | json_writer_t *jw = json_output ? jsonw_new(fp) : NULL; |
aba5acdf | 349 | struct nstat_ent *n, *h; |
d48ed3f4 | 350 | |
aba5acdf | 351 | h = hist_db; |
fcc16c22 | 352 | if (jw) { |
d721a145 | 353 | jsonw_start_object(jw); |
fcc16c22 SH |
354 | jsonw_pretty(jw, pretty); |
355 | jsonw_name(jw, info_source); | |
356 | jsonw_start_object(jw); | |
357 | } else | |
d48ed3f4 SH |
358 | fprintf(fp, "#%s\n", info_source); |
359 | ||
acd1e437 | 360 | for (n = kern_db; n; n = n->next) { |
aba5acdf SH |
361 | int ovfl = 0; |
362 | unsigned long long val = n->val; | |
363 | struct nstat_ent *h1; | |
acd1e437 | 364 | |
aba5acdf SH |
365 | for (h1 = h; h1; h1 = h1->next) { |
366 | if (strcmp(h1->id, n->id) == 0) { | |
367 | if (val < h1->val) { | |
368 | ovfl = 1; | |
369 | val = h1->val; | |
370 | } | |
371 | val -= h1->val; | |
372 | h = h1->next; | |
373 | break; | |
374 | } | |
375 | } | |
376 | if (!dump_zeros && !val && !n->rate) | |
377 | continue; | |
378 | if (!match(n->id)) | |
379 | continue; | |
d48ed3f4 | 380 | |
fcc16c22 SH |
381 | if (jw) |
382 | jsonw_uint_field(jw, n->id, val); | |
383 | else | |
d48ed3f4 SH |
384 | fprintf(fp, "%-32s%-16llu%6.1f%s\n", n->id, val, |
385 | n->rate, ovfl?" (overflow)":""); | |
aba5acdf | 386 | } |
fcc16c22 SH |
387 | |
388 | if (jw) { | |
d721a145 AK |
389 | jsonw_end_object(jw); |
390 | ||
fcc16c22 SH |
391 | jsonw_end_object(jw); |
392 | jsonw_destroy(&jw); | |
393 | } | |
aba5acdf SH |
394 | } |
395 | ||
396 | static int children; | |
397 | ||
d1f28cf1 | 398 | static void sigchild(int signo) |
aba5acdf SH |
399 | { |
400 | } | |
401 | ||
d1f28cf1 | 402 | static void update_db(int interval) |
aba5acdf SH |
403 | { |
404 | struct nstat_ent *n, *h; | |
405 | ||
406 | n = kern_db; | |
407 | kern_db = NULL; | |
408 | ||
409 | load_netstat(); | |
410 | load_snmp6(); | |
411 | load_snmp(); | |
45a0dc16 | 412 | load_sctp_snmp(); |
aba5acdf SH |
413 | |
414 | h = kern_db; | |
415 | kern_db = n; | |
416 | ||
417 | for (n = kern_db; n; n = n->next) { | |
418 | struct nstat_ent *h1; | |
acd1e437 | 419 | |
aba5acdf SH |
420 | for (h1 = h; h1; h1 = h1->next) { |
421 | if (strcmp(h1->id, n->id) == 0) { | |
422 | double sample; | |
cdb2227e ED |
423 | unsigned long long incr = h1->val - n->val; |
424 | ||
425 | n->val = h1->val; | |
426 | sample = (double)incr * 1000.0 / interval; | |
aba5acdf SH |
427 | if (interval >= scan_interval) { |
428 | n->rate += W*(sample-n->rate); | |
429 | } else if (interval >= 1000) { | |
430 | if (interval >= time_constant) { | |
431 | n->rate = sample; | |
432 | } else { | |
433 | double w = W*(double)interval/scan_interval; | |
acd1e437 | 434 | |
aba5acdf SH |
435 | n->rate += w*(sample-n->rate); |
436 | } | |
437 | } | |
438 | ||
439 | while (h != h1) { | |
440 | struct nstat_ent *tmp = h; | |
acd1e437 | 441 | |
aba5acdf SH |
442 | h = h->next; |
443 | free(tmp->id); | |
444 | free(tmp); | |
445 | }; | |
446 | h = h1->next; | |
447 | free(h1->id); | |
448 | free(h1); | |
449 | break; | |
450 | } | |
451 | } | |
452 | } | |
453 | } | |
454 | ||
acd1e437 | 455 | #define T_DIFF(a, b) (((a).tv_sec-(b).tv_sec)*1000 + ((a).tv_usec-(b).tv_usec)/1000) |
aba5acdf SH |
456 | |
457 | ||
d1f28cf1 | 458 | static void server_loop(int fd) |
aba5acdf | 459 | { |
737f15f6 | 460 | struct timeval snaptime = { 0 }; |
aba5acdf | 461 | struct pollfd p; |
acd1e437 | 462 | |
aba5acdf SH |
463 | p.fd = fd; |
464 | p.events = p.revents = POLLIN; | |
ae665a52 | 465 | |
aba5acdf SH |
466 | sprintf(info_source, "%d.%lu sampling_interval=%d time_const=%d", |
467 | getpid(), (unsigned long)random(), scan_interval/1000, time_constant/1000); | |
468 | ||
469 | load_netstat(); | |
470 | load_snmp6(); | |
471 | load_snmp(); | |
45a0dc16 | 472 | load_sctp_snmp(); |
aba5acdf SH |
473 | |
474 | for (;;) { | |
475 | int status; | |
dd81ee04 | 476 | time_t tdiff; |
aba5acdf | 477 | struct timeval now; |
acd1e437 | 478 | |
aba5acdf SH |
479 | gettimeofday(&now, NULL); |
480 | tdiff = T_DIFF(now, snaptime); | |
481 | if (tdiff >= scan_interval) { | |
482 | update_db(tdiff); | |
483 | snaptime = now; | |
484 | tdiff = 0; | |
485 | } | |
dd81ee04 | 486 | if (poll(&p, 1, scan_interval - tdiff) > 0 |
aba5acdf SH |
487 | && (p.revents&POLLIN)) { |
488 | int clnt = accept(fd, NULL, NULL); | |
acd1e437 | 489 | |
aba5acdf SH |
490 | if (clnt >= 0) { |
491 | pid_t pid; | |
acd1e437 | 492 | |
aba5acdf SH |
493 | if (children >= 5) { |
494 | close(clnt); | |
495 | } else if ((pid = fork()) != 0) { | |
acd1e437 | 496 | if (pid > 0) |
aba5acdf SH |
497 | children++; |
498 | close(clnt); | |
499 | } else { | |
500 | FILE *fp = fdopen(clnt, "w"); | |
acd1e437 | 501 | |
dd81ee04 | 502 | if (fp) |
aba5acdf | 503 | dump_kern_db(fp, 0); |
aba5acdf SH |
504 | exit(0); |
505 | } | |
506 | } | |
507 | } | |
508 | while (children && waitpid(-1, &status, WNOHANG) > 0) | |
509 | children--; | |
510 | } | |
511 | } | |
512 | ||
d1f28cf1 | 513 | static int verify_forging(int fd) |
aba5acdf SH |
514 | { |
515 | struct ucred cred; | |
737f15f6 SH |
516 | socklen_t olen = sizeof(cred); |
517 | ||
acd1e437 | 518 | if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, (void *)&cred, &olen) || |
aba5acdf SH |
519 | olen < sizeof(cred)) |
520 | return -1; | |
521 | if (cred.uid == getuid() || cred.uid == 0) | |
522 | return 0; | |
523 | return -1; | |
524 | } | |
525 | ||
526 | static void usage(void) __attribute__((noreturn)); | |
527 | ||
528 | static void usage(void) | |
529 | { | |
530 | fprintf(stderr, | |
8589eb4e MC |
531 | "Usage: nstat [OPTION] [ PATTERN [ PATTERN ] ]\n" |
532 | " -h, --help this message\n" | |
533 | " -a, --ignore ignore history\n" | |
534 | " -d, --scan=SECS sample every statistics every SECS\n" | |
535 | " -j, --json format output in JSON\n" | |
536 | " -n, --nooutput do history only\n" | |
537 | " -p, --pretty pretty print\n" | |
538 | " -r, --reset reset history\n" | |
539 | " -s, --noupdate don't update history\n" | |
540 | " -t, --interval=SECS report average over the last SECS\n" | |
541 | " -V, --version output version information\n" | |
542 | " -z, --zeros show entries with zero activity\n"); | |
aba5acdf SH |
543 | exit(-1); |
544 | } | |
545 | ||
404582c8 SH |
546 | static const struct option longopts[] = { |
547 | { "help", 0, 0, 'h' }, | |
548 | { "ignore", 0, 0, 'a' }, | |
549 | { "scan", 1, 0, 'd'}, | |
550 | { "nooutput", 0, 0, 'n' }, | |
551 | { "json", 0, 0, 'j' }, | |
552 | { "reset", 0, 0, 'r' }, | |
553 | { "noupdate", 0, 0, 's' }, | |
fcc16c22 | 554 | { "pretty", 0, 0, 'p' }, |
404582c8 SH |
555 | { "interval", 1, 0, 't' }, |
556 | { "version", 0, 0, 'V' }, | |
557 | { "zeros", 0, 0, 'z' }, | |
558 | { 0 } | |
559 | }; | |
aba5acdf SH |
560 | |
561 | int main(int argc, char *argv[]) | |
562 | { | |
896ebd6c | 563 | char *hist_name; |
aba5acdf SH |
564 | struct sockaddr_un sun; |
565 | FILE *hist_fp = NULL; | |
566 | int ch; | |
567 | int fd; | |
568 | ||
fcc16c22 | 569 | while ((ch = getopt_long(argc, argv, "h?vVzrnasd:t:jp", |
404582c8 | 570 | longopts, NULL)) != EOF) { |
acd1e437 | 571 | switch (ch) { |
aba5acdf SH |
572 | case 'z': |
573 | dump_zeros = 1; | |
574 | break; | |
575 | case 'r': | |
576 | reset_history = 1; | |
577 | break; | |
578 | case 'a': | |
579 | ignore_history = 1; | |
580 | break; | |
581 | case 's': | |
582 | no_update = 1; | |
583 | break; | |
584 | case 'n': | |
585 | no_output = 1; | |
586 | break; | |
587 | case 'd': | |
588 | scan_interval = 1000*atoi(optarg); | |
589 | break; | |
590 | case 't': | |
591 | if (sscanf(optarg, "%d", &time_constant) != 1 || | |
592 | time_constant <= 0) { | |
593 | fprintf(stderr, "nstat: invalid time constant divisor\n"); | |
594 | exit(-1); | |
595 | } | |
596 | break; | |
d48ed3f4 SH |
597 | case 'j': |
598 | json_output = 1; | |
599 | break; | |
fcc16c22 SH |
600 | case 'p': |
601 | pretty = 1; | |
602 | break; | |
aba5acdf SH |
603 | case 'v': |
604 | case 'V': | |
605 | printf("nstat utility, iproute2-ss%s\n", SNAPSHOT); | |
606 | exit(0); | |
607 | case 'h': | |
608 | case '?': | |
609 | default: | |
610 | usage(); | |
611 | } | |
612 | } | |
613 | ||
614 | argc -= optind; | |
615 | argv += optind; | |
616 | ||
617 | sun.sun_family = AF_UNIX; | |
618 | sun.sun_path[0] = 0; | |
619 | sprintf(sun.sun_path+1, "nstat%d", getuid()); | |
620 | ||
621 | if (scan_interval > 0) { | |
622 | if (time_constant == 0) | |
623 | time_constant = 60; | |
624 | time_constant *= 1000; | |
625 | W = 1 - 1/exp(log(10)*(double)scan_interval/time_constant); | |
626 | if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) { | |
627 | perror("nstat: socket"); | |
628 | exit(-1); | |
629 | } | |
acd1e437 | 630 | if (bind(fd, (struct sockaddr *)&sun, 2+1+strlen(sun.sun_path+1)) < 0) { |
aba5acdf SH |
631 | perror("nstat: bind"); |
632 | exit(-1); | |
633 | } | |
634 | if (listen(fd, 5) < 0) { | |
635 | perror("nstat: listen"); | |
636 | exit(-1); | |
637 | } | |
a7a9ddbb MF |
638 | if (daemon(0, 0)) { |
639 | perror("nstat: daemon"); | |
640 | exit(-1); | |
641 | } | |
aba5acdf SH |
642 | signal(SIGPIPE, SIG_IGN); |
643 | signal(SIGCHLD, sigchild); | |
644 | server_loop(fd); | |
645 | exit(0); | |
646 | } | |
647 | ||
648 | patterns = argv; | |
649 | npatterns = argc; | |
650 | ||
896ebd6c SH |
651 | if ((hist_name = getenv("NSTAT_HISTORY")) == NULL) { |
652 | hist_name = malloc(128); | |
aba5acdf | 653 | sprintf(hist_name, "/tmp/.nstat.u%d", getuid()); |
896ebd6c | 654 | } |
aba5acdf SH |
655 | |
656 | if (reset_history) | |
657 | unlink(hist_name); | |
658 | ||
659 | if (!ignore_history || !no_update) { | |
660 | struct stat stb; | |
661 | ||
662 | fd = open(hist_name, O_RDWR|O_CREAT|O_NOFOLLOW, 0600); | |
663 | if (fd < 0) { | |
664 | perror("nstat: open history file"); | |
665 | exit(-1); | |
666 | } | |
667 | if ((hist_fp = fdopen(fd, "r+")) == NULL) { | |
668 | perror("nstat: fdopen history file"); | |
669 | exit(-1); | |
670 | } | |
671 | if (flock(fileno(hist_fp), LOCK_EX)) { | |
672 | perror("nstat: flock history file"); | |
673 | exit(-1); | |
674 | } | |
675 | if (fstat(fileno(hist_fp), &stb) != 0) { | |
676 | perror("nstat: fstat history file"); | |
677 | exit(-1); | |
678 | } | |
679 | if (stb.st_nlink != 1 || stb.st_uid != getuid()) { | |
680 | fprintf(stderr, "nstat: something is so wrong with history file, that I prefer not to proceed.\n"); | |
681 | exit(-1); | |
682 | } | |
683 | if (!ignore_history) { | |
684 | FILE *tfp; | |
9a230771 | 685 | long uptime = -1; |
acd1e437 | 686 | |
aba5acdf SH |
687 | if ((tfp = fopen("/proc/uptime", "r")) != NULL) { |
688 | if (fscanf(tfp, "%ld", &uptime) != 1) | |
689 | uptime = -1; | |
690 | fclose(tfp); | |
691 | } | |
692 | if (uptime >= 0 && time(NULL) >= stb.st_mtime+uptime) { | |
693 | fprintf(stderr, "nstat: history is aged out, resetting\n"); | |
d572ed4d PS |
694 | if (ftruncate(fileno(hist_fp), 0) < 0) |
695 | perror("nstat: ftruncate"); | |
aba5acdf SH |
696 | } |
697 | } | |
698 | ||
699 | load_good_table(hist_fp); | |
700 | ||
701 | hist_db = kern_db; | |
702 | kern_db = NULL; | |
703 | } | |
704 | ||
705 | if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) >= 0 && | |
acd1e437 | 706 | (connect(fd, (struct sockaddr *)&sun, 2+1+strlen(sun.sun_path+1)) == 0 |
aba5acdf | 707 | || (strcpy(sun.sun_path+1, "nstat0"), |
acd1e437 | 708 | connect(fd, (struct sockaddr *)&sun, 2+1+strlen(sun.sun_path+1)) == 0)) |
aba5acdf SH |
709 | && verify_forging(fd) == 0) { |
710 | FILE *sfp = fdopen(fd, "r"); | |
acd1e437 | 711 | |
6d02518f PS |
712 | if (!sfp) { |
713 | fprintf(stderr, "nstat: fdopen failed: %s\n", | |
714 | strerror(errno)); | |
715 | close(fd); | |
716 | } else { | |
717 | load_good_table(sfp); | |
718 | if (hist_db && source_mismatch) { | |
719 | fprintf(stderr, "nstat: history is stale, ignoring it.\n"); | |
720 | hist_db = NULL; | |
721 | } | |
722 | fclose(sfp); | |
aba5acdf | 723 | } |
aba5acdf SH |
724 | } else { |
725 | if (fd >= 0) | |
726 | close(fd); | |
727 | if (hist_db && info_source[0] && strcmp(info_source, "kernel")) { | |
728 | fprintf(stderr, "nstat: history is stale, ignoring it.\n"); | |
729 | hist_db = NULL; | |
730 | info_source[0] = 0; | |
731 | } | |
732 | load_netstat(); | |
733 | load_snmp6(); | |
734 | load_snmp(); | |
45a0dc16 | 735 | load_sctp_snmp(); |
aba5acdf SH |
736 | if (info_source[0] == 0) |
737 | strcpy(info_source, "kernel"); | |
738 | } | |
739 | ||
740 | if (!no_output) { | |
741 | if (ignore_history || hist_db == NULL) | |
742 | dump_kern_db(stdout, 0); | |
743 | else | |
744 | dump_incr_db(stdout); | |
745 | } | |
746 | if (!no_update) { | |
d572ed4d PS |
747 | if (ftruncate(fileno(hist_fp), 0) < 0) |
748 | perror("nstat: ftruncate"); | |
aba5acdf | 749 | rewind(hist_fp); |
404582c8 SH |
750 | |
751 | json_output = 0; | |
aba5acdf | 752 | dump_kern_db(hist_fp, 1); |
404582c8 | 753 | fclose(hist_fp); |
aba5acdf SH |
754 | } |
755 | exit(0); | |
756 | } |