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20#define MAX_FIELDS 128
21
22
23#define HDR_LINES 10
24
25
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#include "version.h"
42
43static struct option opts[] = {
44 { "version", 0, NULL, 'V' },
45 { "count", 1, NULL, 'c' },
46 { "dump", 0, NULL, 'd' },
47 { "json", 0, NULL, 'j' },
48 { "file", 1, NULL, 'f' },
49 { "help", 0, NULL, 'h' },
50 { "interval", 1, NULL, 'i' },
51 { "keys", 1, NULL, 'k' },
52 { "subject", 1, NULL, 's' },
53 { "width", 1, NULL, 'w' },
54 { "oneline", 0, NULL, 0 },
55};
56
57static int usage(char *name, int exit_code)
58{
59 fprintf(stderr,
60 "%s Version %s\n"
61 "Copyright (C) 2004 by Harald Welte <laforge@gnumonks.org>\n"
62 "This program is free software licensed under GNU GPLv2\nwith ABSOLUTELY NO WARRANTY.\n"
63 "\n"
64 "Parameters:\n"
65 " -V --version Print Version of Program\n"
66 " -c --count <count> "
67 "Print <count> number of intervals\n"
68 " -d --dump "
69 "Dump list of available files/keys\n"
70 " -j --json "
71 "Display in JSON format\n"
72 " -f --file <file> Statistics file to use\n"
73 " -h --help This help message\n"
74 " -i --interval <intv> "
75 "Set interval to 'intv' seconds\n"
76 " -k --keys k,k,k,... Display only keys specified\n"
77 " -s --subject [0-2] Control header printing:\n"
78 " 0 = never\n"
79 " 1 = once\n"
80 " 2 = every 20 lines (default))\n"
81 " -w --width n,n,n,... Width for each field\n"
82 "\n",
83 name, version);
84
85 exit(exit_code);
86}
87
88struct field_param {
89 const char *name;
90 struct lnstat_field *lf;
91 struct {
92 unsigned int width;
93 } print;
94};
95
96struct field_params {
97 unsigned int num;
98 struct field_param params[MAX_FIELDS];
99};
100
101static void print_line(FILE *of, const struct lnstat_file *lnstat_files,
102 const struct field_params *fp)
103{
104 int i;
105
106 for (i = 0; i < fp->num; i++) {
107 const struct lnstat_field *lf = fp->params[i].lf;
108
109 fprintf(of, "%*lu|", fp->params[i].print.width, lf->result);
110 }
111 fputc('\n', of);
112}
113
114static void print_json(FILE *of, const struct lnstat_file *lnstat_files,
115 const struct field_params *fp)
116{
117 json_writer_t *jw = jsonw_new(of);
118 int i;
119
120 jsonw_start_object(jw);
121 for (i = 0; i < fp->num; i++) {
122 const struct lnstat_field *lf = fp->params[i].lf;
123
124 jsonw_uint_field(jw, lf->name, lf->result);
125 }
126 jsonw_end_object(jw);
127 jsonw_destroy(&jw);
128}
129
130
131static int map_field_params(struct lnstat_file *lnstat_files,
132 struct field_params *fps, int interval)
133{
134 int i, j = 0;
135 struct lnstat_file *lf;
136
137
138 if (!fps->num) {
139 for (lf = lnstat_files; lf; lf = lf->next) {
140 for (i = 0; i < lf->num_fields; i++) {
141 fps->params[j].lf = &lf->fields[i];
142 fps->params[j].lf->file->interval.tv_sec =
143 interval;
144 if (!fps->params[j].print.width)
145 fps->params[j].print.width =
146 FIELD_WIDTH_DEFAULT;
147
148 if (++j >= MAX_FIELDS - 1) {
149 fprintf(stderr,
150 "WARN: MAX_FIELDS (%d) reached, truncating number of keys\n",
151 MAX_FIELDS);
152 goto full;
153 }
154 }
155 }
156full:
157 fps->num = j;
158 return 1;
159 }
160
161 for (i = 0; i < fps->num; i++) {
162 fps->params[i].lf = lnstat_find_field(lnstat_files,
163 fps->params[i].name);
164 if (!fps->params[i].lf) {
165 fprintf(stderr, "Field `%s' unknown\n",
166 fps->params[i].name);
167 return 0;
168 }
169 fps->params[i].lf->file->interval.tv_sec = interval;
170 if (!fps->params[i].print.width)
171 fps->params[i].print.width = FIELD_WIDTH_DEFAULT;
172 }
173 return 1;
174}
175
176struct table_hdr {
177 int num_lines;
178 char *hdr[HDR_LINES];
179};
180
181static struct table_hdr *build_hdr_string(struct lnstat_file *lnstat_files,
182 struct field_params *fps,
183 int linewidth)
184{
185 int h, i;
186 static struct table_hdr th;
187 int ofs = 0;
188
189 for (i = 0; i < HDR_LINES; i++)
190 th.hdr[i] = calloc(1, HDR_LINE_LENGTH);
191
192 for (i = 0; i < fps->num; i++) {
193 char *cname, *fname = fps->params[i].lf->name;
194 unsigned int width = fps->params[i].print.width;
195
196 snprintf(th.hdr[0]+ofs, width+2, "%*.*s|", width, width,
197 fps->params[i].lf->file->basename);
198
199 cname = fname;
200 for (h = 1; h < HDR_LINES; h++) {
201 if (cname - fname >= strlen(fname))
202 snprintf(th.hdr[h]+ofs, width+2,
203 "%*.*s|", width, width, "");
204 else {
205 th.num_lines = h+1;
206 snprintf(th.hdr[h]+ofs, width+2,
207 "%*.*s|", width, width, cname);
208 }
209 cname += width;
210 }
211 ofs += width+1;
212 }
213
214 for (h = 1; h <= th.num_lines; h++) {
215 for (i = 0; i < ofs; i++) {
216 if (th.hdr[h][i] == '\0')
217 th.hdr[h][i] = ' ';
218 }
219 }
220
221 return &th;
222}
223
224static int print_hdr(FILE *of, struct table_hdr *th)
225{
226 int i;
227
228 for (i = 0; i < th->num_lines; i++) {
229 fputs(th->hdr[i], of);
230 fputc('\n', of);
231 }
232 return 0;
233}
234
235
236int main(int argc, char **argv)
237{
238 struct lnstat_file *lnstat_files;
239 const char *basename;
240 int i, c;
241 int interval = DEFAULT_INTERVAL;
242 int hdr = 2;
243 enum {
244 MODE_DUMP,
245 MODE_JSON,
246 MODE_NORMAL,
247 } mode = MODE_NORMAL;
248 unsigned long count = 0;
249 struct table_hdr *header;
250 static struct field_params fp;
251 int num_req_files = 0;
252 char *req_files[LNSTAT_MAX_FILES];
253
254
255 basename = strrchr(argv[0], '/');
256 if (basename)
257 basename += 1;
258 else
259 basename = argv[0];
260
261 if (!strcmp(basename, "rtstat")) {
262
263 req_files[0] = "rt_cache";
264 num_req_files = 1;
265 } else if (!strcmp(basename, "ctstat")) {
266
267 req_files[0] = "ip_conntrack";
268 num_req_files = 1;
269 }
270
271 while ((c = getopt_long(argc, argv, "Vc:djpf:h?i:k:s:w:",
272 opts, NULL)) != -1) {
273 int len = 0;
274 char *tmp, *tok;
275
276 switch (c) {
277 case 'c':
278 count = strtoul(optarg, NULL, 0);
279 break;
280 case 'd':
281 mode = MODE_DUMP;
282 break;
283 case 'j':
284 mode = MODE_JSON;
285 break;
286 case 'f':
287 req_files[num_req_files++] = strdup(optarg);
288 break;
289 case '?':
290 case 'h':
291 usage(argv[0], 0);
292 break;
293 case 'i':
294 sscanf(optarg, "%u", &interval);
295 break;
296 case 'k':
297 tmp = strdup(optarg);
298 if (!tmp)
299 break;
300 for (tok = strtok(tmp, ",");
301 tok;
302 tok = strtok(NULL, ",")) {
303 if (fp.num >= MAX_FIELDS) {
304 fprintf(stderr,
305 "WARN: too many keys requested: (%d max)\n",
306 MAX_FIELDS);
307 break;
308 }
309 fp.params[fp.num++].name = tok;
310 }
311 break;
312 case 's':
313 sscanf(optarg, "%u", &hdr);
314 break;
315 case 'w':
316 tmp = strdup(optarg);
317 if (!tmp)
318 break;
319 i = 0;
320 for (tok = strtok(tmp, ",");
321 tok;
322 tok = strtok(NULL, ",")) {
323 len = strtoul(tok, NULL, 0);
324 if (len > FIELD_WIDTH_MAX)
325 len = FIELD_WIDTH_MAX;
326 fp.params[i].print.width = len;
327 i++;
328 }
329 if (i == 1) {
330 for (i = 0; i < MAX_FIELDS; i++)
331 fp.params[i].print.width = len;
332 }
333 break;
334 default:
335 usage(argv[0], 1);
336 break;
337 }
338 }
339
340 lnstat_files = lnstat_scan_dir(PROC_NET_STAT, num_req_files,
341 (const char **) req_files);
342
343 switch (mode) {
344 case MODE_DUMP:
345 lnstat_dump(stdout, lnstat_files);
346 break;
347
348 case MODE_NORMAL:
349 case MODE_JSON:
350 if (!map_field_params(lnstat_files, &fp, interval))
351 exit(1);
352
353 header = build_hdr_string(lnstat_files, &fp, 80);
354 if (!header)
355 exit(1);
356
357 if (interval < 1)
358 interval = 1;
359
360 for (i = 0; i < count || !count; i++) {
361 lnstat_update(lnstat_files);
362 if (mode == MODE_JSON)
363 print_json(stdout, lnstat_files, &fp);
364 else {
365 if ((hdr > 1 && !(i % 20)) ||
366 (hdr == 1 && i == 0))
367 print_hdr(stdout, header);
368 print_line(stdout, lnstat_files, &fp);
369 }
370 fflush(stdout);
371 if (i < count - 1 || !count)
372 sleep(interval);
373 }
374 break;
375 }
376
377 return 1;
378}
379
