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1 | /* lnstat - Unified linux network statistics | |
2 | * | |
3 | * Copyright (C) 2004 by Harald Welte <laforge@gnumonks.org> | |
4 | * | |
5 | * Development of this code was funded by Astaro AG, http://www.astaro.com/ | |
6 | * | |
7 | * Based on original concept and ideas from predecessor rtstat.c: | |
8 | * | |
9 | * Copyright 2001 by Robert Olsson <robert.olsson@its.uu.se> | |
10 | * Uppsala University, Sweden | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2 of the License, or | |
15 | * (at your option) any later version. | |
16 | * | |
17 | */ | |
18 | ||
19 | /* Maximum number of fields that can be displayed */ | |
20 | #define MAX_FIELDS 128 | |
21 | ||
22 | /* Maximum number of header lines */ | |
23 | #define HDR_LINES 10 | |
24 | ||
25 | /* default field width if none specified */ | |
26 | #define FIELD_WIDTH_DEFAULT 8 | |
27 | #define FIELD_WIDTH_MAX 20 | |
28 | ||
29 | #define DEFAULT_INTERVAL 2 | |
30 | ||
31 | #define HDR_LINE_LENGTH (MAX_FIELDS*FIELD_WIDTH_MAX) | |
32 | ||
33 | #include <unistd.h> | |
34 | #include <stdio.h> | |
35 | #include <stdlib.h> | |
36 | #include <string.h> | |
37 | #include <getopt.h> | |
38 | ||
39 | #include <json_writer.h> | |
40 | #include "lnstat.h" | |
41 | ||
42 | static struct option opts[] = { | |
43 | { "version", 0, NULL, 'V' }, | |
44 | { "count", 1, NULL, 'c' }, | |
45 | { "dump", 0, NULL, 'd' }, | |
46 | { "json", 0, NULL, 'j' }, | |
47 | { "file", 1, NULL, 'f' }, | |
48 | { "help", 0, NULL, 'h' }, | |
49 | { "interval", 1, NULL, 'i' }, | |
50 | { "keys", 1, NULL, 'k' }, | |
51 | { "subject", 1, NULL, 's' }, | |
52 | { "width", 1, NULL, 'w' }, | |
53 | { "oneline", 0, NULL, 0 }, | |
54 | }; | |
55 | ||
56 | static int usage(char *name, int exit_code) | |
57 | { | |
58 | fprintf(stderr, | |
59 | "%s Version %s\n" | |
60 | "Copyright (C) 2004 by Harald Welte <laforge@gnumonks.org>\n" | |
61 | "This program is free software licensed under GNU GPLv2\nwith ABSOLUTELY NO WARRANTY.\n" | |
62 | "\n" | |
63 | "Parameters:\n" | |
64 | " -V --version Print Version of Program\n" | |
65 | " -c --count <count> " | |
66 | "Print <count> number of intervals\n" | |
67 | " -d --dump " | |
68 | "Dump list of available files/keys\n" | |
69 | " -j --json " | |
70 | "Display in JSON format\n" | |
71 | " -f --file <file> Statistics file to use\n" | |
72 | " -h --help This help message\n" | |
73 | " -i --interval <intv> " | |
74 | "Set interval to 'intv' seconds\n" | |
75 | " -k --keys k,k,k,... Display only keys specified\n" | |
76 | " -s --subject [0-2] Control header printing:\n" | |
77 | " 0 = never\n" | |
78 | " 1 = once\n" | |
79 | " 2 = every 20 lines (default))\n" | |
80 | " -w --width n,n,n,... Width for each field\n" | |
81 | "\n", | |
82 | name, LNSTAT_VERSION); | |
83 | ||
84 | exit(exit_code); | |
85 | } | |
86 | ||
87 | struct field_param { | |
88 | const char *name; | |
89 | struct lnstat_field *lf; | |
90 | struct { | |
91 | unsigned int width; | |
92 | } print; | |
93 | }; | |
94 | ||
95 | struct field_params { | |
96 | unsigned int num; | |
97 | struct field_param params[MAX_FIELDS]; | |
98 | }; | |
99 | ||
100 | static void print_line(FILE *of, const struct lnstat_file *lnstat_files, | |
101 | const struct field_params *fp) | |
102 | { | |
103 | int i; | |
104 | ||
105 | for (i = 0; i < fp->num; i++) { | |
106 | const struct lnstat_field *lf = fp->params[i].lf; | |
107 | ||
108 | fprintf(of, "%*lu|", fp->params[i].print.width, lf->result); | |
109 | } | |
110 | fputc('\n', of); | |
111 | } | |
112 | ||
113 | static void print_json(FILE *of, const struct lnstat_file *lnstat_files, | |
114 | const struct field_params *fp) | |
115 | { | |
116 | json_writer_t *jw = jsonw_new(of); | |
117 | int i; | |
118 | ||
119 | jsonw_start_object(jw); | |
120 | for (i = 0; i < fp->num; i++) { | |
121 | const struct lnstat_field *lf = fp->params[i].lf; | |
122 | ||
123 | jsonw_uint_field(jw, lf->name, lf->result); | |
124 | } | |
125 | jsonw_end_object(jw); | |
126 | jsonw_destroy(&jw); | |
127 | } | |
128 | ||
129 | /* find lnstat_field according to user specification */ | |
130 | static int map_field_params(struct lnstat_file *lnstat_files, | |
131 | struct field_params *fps, int interval) | |
132 | { | |
133 | int i, j = 0; | |
134 | struct lnstat_file *lf; | |
135 | ||
136 | /* no field specification on commandline, need to build default */ | |
137 | if (!fps->num) { | |
138 | for (lf = lnstat_files; lf; lf = lf->next) { | |
139 | for (i = 0; i < lf->num_fields; i++) { | |
140 | fps->params[j].lf = &lf->fields[i]; | |
141 | fps->params[j].lf->file->interval.tv_sec = | |
142 | interval; | |
143 | if (!fps->params[j].print.width) | |
144 | fps->params[j].print.width = | |
145 | FIELD_WIDTH_DEFAULT; | |
146 | ||
147 | if (++j >= MAX_FIELDS - 1) { | |
148 | fprintf(stderr, | |
149 | "WARN: MAX_FIELDS (%d) reached, truncating number of keys\n", | |
150 | MAX_FIELDS); | |
151 | goto full; | |
152 | } | |
153 | } | |
154 | } | |
155 | full: | |
156 | fps->num = j; | |
157 | return 1; | |
158 | } | |
159 | ||
160 | for (i = 0; i < fps->num; i++) { | |
161 | fps->params[i].lf = lnstat_find_field(lnstat_files, | |
162 | fps->params[i].name); | |
163 | if (!fps->params[i].lf) { | |
164 | fprintf(stderr, "Field `%s' unknown\n", | |
165 | fps->params[i].name); | |
166 | return 0; | |
167 | } | |
168 | fps->params[i].lf->file->interval.tv_sec = interval; | |
169 | if (!fps->params[i].print.width) | |
170 | fps->params[i].print.width = FIELD_WIDTH_DEFAULT; | |
171 | } | |
172 | return 1; | |
173 | } | |
174 | ||
175 | struct table_hdr { | |
176 | int num_lines; | |
177 | char *hdr[HDR_LINES]; | |
178 | }; | |
179 | ||
180 | static struct table_hdr *build_hdr_string(struct lnstat_file *lnstat_files, | |
181 | struct field_params *fps, | |
182 | int linewidth) | |
183 | { | |
184 | int h, i; | |
185 | static struct table_hdr th; | |
186 | int ofs = 0; | |
187 | ||
188 | for (i = 0; i < HDR_LINES; i++) | |
189 | th.hdr[i] = calloc(1, HDR_LINE_LENGTH); | |
190 | ||
191 | for (i = 0; i < fps->num; i++) { | |
192 | char *cname, *fname = fps->params[i].lf->name; | |
193 | unsigned int width = fps->params[i].print.width; | |
194 | ||
195 | snprintf(th.hdr[0]+ofs, width+2, "%*.*s|", width, width, | |
196 | fps->params[i].lf->file->basename); | |
197 | ||
198 | cname = fname; | |
199 | for (h = 1; h < HDR_LINES; h++) { | |
200 | if (cname - fname >= strlen(fname)) | |
201 | snprintf(th.hdr[h]+ofs, width+2, | |
202 | "%*.*s|", width, width, ""); | |
203 | else { | |
204 | th.num_lines = h+1; | |
205 | snprintf(th.hdr[h]+ofs, width+2, | |
206 | "%*.*s|", width, width, cname); | |
207 | } | |
208 | cname += width; | |
209 | } | |
210 | ofs += width+1; | |
211 | } | |
212 | /* fill in spaces */ | |
213 | for (h = 1; h <= th.num_lines; h++) { | |
214 | for (i = 0; i < ofs; i++) { | |
215 | if (th.hdr[h][i] == '\0') | |
216 | th.hdr[h][i] = ' '; | |
217 | } | |
218 | } | |
219 | ||
220 | return &th; | |
221 | } | |
222 | ||
223 | static int print_hdr(FILE *of, struct table_hdr *th) | |
224 | { | |
225 | int i; | |
226 | ||
227 | for (i = 0; i < th->num_lines; i++) { | |
228 | fputs(th->hdr[i], of); | |
229 | fputc('\n', of); | |
230 | } | |
231 | return 0; | |
232 | } | |
233 | ||
234 | ||
235 | int main(int argc, char **argv) | |
236 | { | |
237 | struct lnstat_file *lnstat_files; | |
238 | const char *basename; | |
239 | int i, c; | |
240 | int interval = DEFAULT_INTERVAL; | |
241 | int hdr = 2; | |
242 | enum { | |
243 | MODE_DUMP, | |
244 | MODE_JSON, | |
245 | MODE_NORMAL, | |
246 | } mode = MODE_NORMAL; | |
247 | unsigned long count = 0; | |
248 | struct table_hdr *header; | |
249 | static struct field_params fp; | |
250 | int num_req_files = 0; | |
251 | char *req_files[LNSTAT_MAX_FILES]; | |
252 | ||
253 | /* backwards compatibility mode for old tools */ | |
254 | basename = strrchr(argv[0], '/'); | |
255 | if (basename) | |
256 | basename += 1; /* name after slash */ | |
257 | else | |
258 | basename = argv[0]; /* no slash */ | |
259 | ||
260 | if (!strcmp(basename, "rtstat")) { | |
261 | /* rtstat compatibility mode */ | |
262 | req_files[0] = "rt_cache"; | |
263 | num_req_files = 1; | |
264 | } else if (!strcmp(basename, "ctstat")) { | |
265 | /* ctstat compatibility mode */ | |
266 | req_files[0] = "ip_conntrack"; | |
267 | num_req_files = 1; | |
268 | } | |
269 | ||
270 | while ((c = getopt_long(argc, argv, "Vc:djpf:h?i:k:s:w:", | |
271 | opts, NULL)) != -1) { | |
272 | int len = 0; | |
273 | char *tmp, *tok; | |
274 | ||
275 | switch (c) { | |
276 | case 'c': | |
277 | count = strtoul(optarg, NULL, 0); | |
278 | break; | |
279 | case 'd': | |
280 | mode = MODE_DUMP; | |
281 | break; | |
282 | case 'j': | |
283 | mode = MODE_JSON; | |
284 | break; | |
285 | case 'f': | |
286 | req_files[num_req_files++] = strdup(optarg); | |
287 | break; | |
288 | case '?': | |
289 | case 'h': | |
290 | usage(argv[0], 0); | |
291 | break; | |
292 | case 'i': | |
293 | sscanf(optarg, "%u", &interval); | |
294 | break; | |
295 | case 'k': | |
296 | tmp = strdup(optarg); | |
297 | if (!tmp) | |
298 | break; | |
299 | for (tok = strtok(tmp, ","); | |
300 | tok; | |
301 | tok = strtok(NULL, ",")) { | |
302 | if (fp.num >= MAX_FIELDS) { | |
303 | fprintf(stderr, | |
304 | "WARN: too many keys requested: (%d max)\n", | |
305 | MAX_FIELDS); | |
306 | break; | |
307 | } | |
308 | fp.params[fp.num++].name = tok; | |
309 | } | |
310 | break; | |
311 | case 's': | |
312 | sscanf(optarg, "%u", &hdr); | |
313 | break; | |
314 | case 'w': | |
315 | tmp = strdup(optarg); | |
316 | if (!tmp) | |
317 | break; | |
318 | i = 0; | |
319 | for (tok = strtok(tmp, ","); | |
320 | tok; | |
321 | tok = strtok(NULL, ",")) { | |
322 | len = strtoul(tok, NULL, 0); | |
323 | if (len > FIELD_WIDTH_MAX) | |
324 | len = FIELD_WIDTH_MAX; | |
325 | fp.params[i].print.width = len; | |
326 | i++; | |
327 | } | |
328 | if (i == 1) { | |
329 | for (i = 0; i < MAX_FIELDS; i++) | |
330 | fp.params[i].print.width = len; | |
331 | } | |
332 | break; | |
333 | default: | |
334 | usage(argv[0], 1); | |
335 | break; | |
336 | } | |
337 | } | |
338 | ||
339 | lnstat_files = lnstat_scan_dir(PROC_NET_STAT, num_req_files, | |
340 | (const char **) req_files); | |
341 | ||
342 | switch (mode) { | |
343 | case MODE_DUMP: | |
344 | lnstat_dump(stdout, lnstat_files); | |
345 | break; | |
346 | ||
347 | case MODE_NORMAL: | |
348 | case MODE_JSON: | |
349 | if (!map_field_params(lnstat_files, &fp, interval)) | |
350 | exit(1); | |
351 | ||
352 | header = build_hdr_string(lnstat_files, &fp, 80); | |
353 | if (!header) | |
354 | exit(1); | |
355 | ||
356 | if (interval < 1) | |
357 | interval = 1; | |
358 | ||
359 | for (i = 0; i < count || !count; i++) { | |
360 | lnstat_update(lnstat_files); | |
361 | if (mode == MODE_JSON) | |
362 | print_json(stdout, lnstat_files, &fp); | |
363 | else { | |
364 | if ((hdr > 1 && !(i % 20)) || | |
365 | (hdr == 1 && i == 0)) | |
366 | print_hdr(stdout, header); | |
367 | print_line(stdout, lnstat_files, &fp); | |
368 | } | |
369 | fflush(stdout); | |
370 | if (i < count - 1 || !count) | |
371 | sleep(interval); | |
372 | } | |
373 | break; | |
374 | } | |
375 | ||
376 | return 1; | |
377 | } |