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 "lnstat.h"
40
41 static struct option opts[] = {
42 { "version", 0, NULL, 'V' },
43 { "count", 1, NULL, 'c' },
44 { "dump", 1, NULL, 'd' },
45 { "file", 1, NULL, 'f' },
46 { "help", 0, NULL, 'h' },
47 { "interval", 1, NULL, 'i' },
48 { "key", 1, NULL, 'k' },
49 { "subject", 1, NULL, 's' },
50 { "width", 1, NULL, 'w' },
51 };
52
usage(char * name,int exit_code)53 static int usage(char *name, int exit_code)
54 {
55 fprintf(stderr, "%s Version %s\n", name, LNSTAT_VERSION);
56 fprintf(stderr, "Copyright (C) 2004 by Harald Welte "
57 "<laforge@gnumonks.org>\n");
58 fprintf(stderr, "This program is free software licensed under GNU GPLv2"
59 "\nwith ABSOLUTELY NO WARRANTY.\n\n");
60 fprintf(stderr, "Parameters:\n");
61 fprintf(stderr, "\t-V --version\t\tPrint Version of Program\n");
62 fprintf(stderr, "\t-c --count <count>\t"
63 "Print <count> number of intervals\n");
64 fprintf(stderr, "\t-d --dumpt\t\t"
65 "Dump list of available files/keys\n");
66 fprintf(stderr, "\t-f --file <file>\tStatistics file to use\n");
67 fprintf(stderr, "\t-h --help\t\tThis help message\n");
68 fprintf(stderr, "\t-i --interval <intv>\t"
69 "Set interval to 'intv' seconds\n");
70 fprintf(stderr, "\t-k --keys k,k,k,...\tDisplay only keys specified\n");
71 fprintf(stderr, "\t-s --subject [0-2]\t?\n");
72 fprintf(stderr, "\t-w --width n,n,n,...\tWidth for each field\n");
73 fprintf(stderr, "\n");
74
75 exit(exit_code);
76 }
77
78 struct field_param {
79 const char *name;
80 struct lnstat_field *lf;
81 struct {
82 unsigned int width;
83 } print;
84 };
85
86 struct field_params {
87 unsigned int num;
88 struct field_param params[MAX_FIELDS];
89 };
90
print_line(FILE * of,const struct lnstat_file * lnstat_files,const struct field_params * fp)91 static void print_line(FILE *of, const struct lnstat_file *lnstat_files,
92 const struct field_params *fp)
93 {
94 int i;
95
96 for (i = 0; i < fp->num; i++) {
97 struct lnstat_field *lf = fp->params[i].lf;
98 char formatbuf[255];
99
100 snprintf(formatbuf, sizeof(formatbuf)-1, "%%%ulu|",
101 fp->params[i].print.width);
102 fprintf(of, formatbuf, lf->result);
103 }
104 fputc('\n', of);
105 }
106
107 /* find lnstat_field according to user specification */
map_field_params(struct lnstat_file * lnstat_files,struct field_params * fps,int interval)108 static int map_field_params(struct lnstat_file *lnstat_files,
109 struct field_params *fps, int interval)
110 {
111 int i, j = 0;
112 struct lnstat_file *lf;
113
114 /* no field specification on commandline, need to build default */
115 if (!fps->num) {
116 for (lf = lnstat_files; lf; lf = lf->next) {
117 for (i = 0; i < lf->num_fields; i++) {
118 fps->params[j].lf = &lf->fields[i];
119 fps->params[j].lf->file->interval.tv_sec =
120 interval;
121 if (!fps->params[j].print.width)
122 fps->params[j].print.width =
123 FIELD_WIDTH_DEFAULT;
124
125 if (++j >= MAX_FIELDS - 1) {
126 fprintf(stderr,
127 "WARN: MAX_FIELDS (%d) reached,"
128 " truncating number of keys\n",
129 MAX_FIELDS);
130 goto full;
131 }
132 }
133 }
134 full:
135 fps->num = j;
136 return 1;
137 }
138
139 for (i = 0; i < fps->num; i++) {
140 fps->params[i].lf = lnstat_find_field(lnstat_files,
141 fps->params[i].name);
142 if (!fps->params[i].lf) {
143 fprintf(stderr, "Field `%s' unknown\n",
144 fps->params[i].name);
145 return 0;
146 }
147 fps->params[i].lf->file->interval.tv_sec = interval;
148 if (!fps->params[i].print.width)
149 fps->params[i].print.width = FIELD_WIDTH_DEFAULT;
150 }
151 return 1;
152 }
153
154 struct table_hdr {
155 int num_lines;
156 char *hdr[HDR_LINES];
157 };
158
build_hdr_string(struct lnstat_file * lnstat_files,struct field_params * fps,int linewidth)159 static struct table_hdr *build_hdr_string(struct lnstat_file *lnstat_files,
160 struct field_params *fps,
161 int linewidth)
162 {
163 int h,i;
164 static struct table_hdr th;
165 int ofs = 0;
166
167 for (i = 0; i < HDR_LINES; i++) {
168 th.hdr[i] = malloc(HDR_LINE_LENGTH);
169 memset(th.hdr[i], 0, sizeof(th.hdr[i]));
170 }
171
172 for (i = 0; i < fps->num; i++) {
173 char *cname, *fname = fps->params[i].lf->name;
174 char fmt[12];
175 unsigned int width = fps->params[i].print.width;
176
177 snprintf(fmt, sizeof(fmt)-1, "%%%u.%us|", width, width);
178
179 snprintf(th.hdr[0]+ofs, width+2, fmt,
180 fps->params[i].lf->file->basename);
181
182 cname = fname;
183 for (h = 1; h < HDR_LINES; h++) {
184 if (cname - fname >= strlen(fname))
185 snprintf(th.hdr[h]+ofs, width+2, fmt, "");
186 else {
187 th.num_lines = h+1;
188 snprintf(th.hdr[h]+ofs, width+2, fmt, cname);
189 }
190 cname += width;
191 }
192 ofs += width+1;
193 }
194 /* fill in spaces */
195 for (h = 1; h <= th.num_lines; h++) {
196 for (i = 0; i < ofs; i++) {
197 if (th.hdr[h][i] == '\0')
198 th.hdr[h][i] = ' ';
199 }
200 }
201
202 return &th;
203 }
204
print_hdr(FILE * of,struct table_hdr * th)205 static int print_hdr(FILE *of, struct table_hdr *th)
206 {
207 int i;
208
209 for (i = 0; i < th->num_lines; i++) {
210 fputs(th->hdr[i], of);
211 fputc('\n', of);
212 }
213 return 0;
214 }
215
216
main(int argc,char ** argv)217 int main(int argc, char **argv)
218 {
219 struct lnstat_file *lnstat_files;
220 const char *basename;
221 int c;
222 int interval = DEFAULT_INTERVAL;
223 int hdr = 2;
224 enum {
225 MODE_DUMP,
226 MODE_NORMAL,
227 } mode = MODE_NORMAL;
228
229 unsigned long count = 1;
230 static struct field_params fp;
231 int num_req_files = 0;
232 char *req_files[LNSTAT_MAX_FILES];
233
234 /* backwards compatibility mode for old tools */
235 basename = strrchr(argv[0], '/');
236 if (basename)
237 basename += 1; /* name after slash */
238 else
239 basename = argv[0]; /* no slash */
240
241 if (!strcmp(basename, "rtstat")) {
242 /* rtstat compatibility mode */
243 req_files[0] = "rt_cache";
244 num_req_files = 1;
245 } else if (!strcmp(basename, "ctstat")) {
246 /* ctstat compatibility mode */
247 req_files[0] = "ip_conntrack";
248 num_req_files = 1;
249 }
250
251 while ((c = getopt_long(argc, argv,"Vc:df:h?i:k:s:w:",
252 opts, NULL)) != -1) {
253 int i, len = 0;
254 char *tmp, *tok;
255
256 switch (c) {
257 case 'c':
258 count = strtoul(optarg, NULL, 0);
259 break;
260 case 'd':
261 mode = MODE_DUMP;
262 break;
263 case 'f':
264 req_files[num_req_files++] = strdup(optarg);
265 break;
266 case '?':
267 case 'h':
268 usage(argv[0], 0);
269 break;
270 case 'i':
271 sscanf(optarg, "%u", &interval);
272 break;
273 case 'k':
274 tmp = strdup(optarg);
275 if (!tmp)
276 break;
277 for (tok = strtok(tmp, ",");
278 tok;
279 tok = strtok(NULL, ",")) {
280 if (fp.num >= MAX_FIELDS) {
281 fprintf(stderr,
282 "WARN: too many keys"
283 " requested: (%d max)\n",
284 MAX_FIELDS);
285 break;
286 }
287 fp.params[fp.num++].name = tok;
288 }
289 break;
290 case 's':
291 sscanf(optarg, "%u", &hdr);
292 break;
293 case 'w':
294 tmp = strdup(optarg);
295 if (!tmp)
296 break;
297 i = 0;
298 for (tok = strtok(tmp, ",");
299 tok;
300 tok = strtok(NULL, ",")) {
301 len = strtoul(tok, NULL, 0);
302 if (len > FIELD_WIDTH_MAX)
303 len = FIELD_WIDTH_MAX;
304 fp.params[i].print.width = len;
305 i++;
306 }
307 if (i == 1) {
308 for (i = 0; i < MAX_FIELDS; i++)
309 fp.params[i].print.width = len;
310 }
311 break;
312 default:
313 usage(argv[0], 1);
314 break;
315 }
316 }
317
318 lnstat_files = lnstat_scan_dir(PROC_NET_STAT, num_req_files,
319 (const char **) req_files);
320
321 switch (mode) {
322 int i;
323 struct table_hdr *header;
324 case MODE_DUMP:
325 lnstat_dump(stderr, lnstat_files);
326 break;
327 case MODE_NORMAL:
328
329 if (!map_field_params(lnstat_files, &fp, interval))
330 exit(1);
331
332 header = build_hdr_string(lnstat_files, &fp, 80);
333 if (!header)
334 exit(1);
335
336 if (interval < 1 )
337 interval=1;
338
339 for (i = 0; i < count; i++) {
340 if ((hdr > 1 && (! (i % 20))) || (hdr == 1 && i == 0))
341 print_hdr(stdout, header);
342 lnstat_update(lnstat_files);
343 print_line(stdout, lnstat_files, &fp);
344 fflush(stdout);
345 sleep(interval);
346 }
347 }
348
349 return 1;
350 }
351
352