1 /* lnstat - Unified linux network statistics 2 * 3 * Copyright (C) 2004 by Harald Welte <laforge (at) 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 (at) 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, "%s Version %s\n", name, LNSTAT_VERSION); 59 fprintf(stderr, "Copyright (C) 2004 by Harald Welte " 60 "<laforge (at) gnumonks.org>\n"); 61 fprintf(stderr, "This program is free software licensed under GNU GPLv2" 62 "\nwith ABSOLUTELY NO WARRANTY.\n\n"); 63 fprintf(stderr, "Parameters:\n"); 64 fprintf(stderr, "\t-V --version\t\tPrint Version of Program\n"); 65 fprintf(stderr, "\t-c --count <count>\t" 66 "Print <count> number of intervals\n"); 67 fprintf(stderr, "\t-d --dump\t\t" 68 "Dump list of available files/keys\n"); 69 fprintf(stderr, "\t-j --json\t\t" 70 "Display in JSON format\n"); 71 fprintf(stderr, "\t-f --file <file>\tStatistics file to use\n"); 72 fprintf(stderr, "\t-h --help\t\tThis help message\n"); 73 fprintf(stderr, "\t-i --interval <intv>\t" 74 "Set interval to 'intv' seconds\n"); 75 fprintf(stderr, "\t-k --keys k,k,k,...\tDisplay only keys specified\n"); 76 fprintf(stderr, "\t-s --subject [0-2]\tControl header printing:\n"); 77 fprintf(stderr, "\t\t\t\t0 = never\n"); 78 fprintf(stderr, "\t\t\t\t1 = once\n"); 79 fprintf(stderr, "\t\t\t\t2 = every 20 lines (default))\n"); 80 fprintf(stderr, "\t-w --width n,n,n,...\tWidth for each field\n"); 81 fprintf(stderr, "\n"); 82 83 exit(exit_code); 84 } 85 86 struct field_param { 87 const char *name; 88 struct lnstat_field *lf; 89 struct { 90 unsigned int width; 91 } print; 92 }; 93 94 struct field_params { 95 unsigned int num; 96 struct field_param params[MAX_FIELDS]; 97 }; 98 99 static void print_line(FILE *of, const struct lnstat_file *lnstat_files, 100 const struct field_params *fp) 101 { 102 int i; 103 104 for (i = 0; i < fp->num; i++) { 105 const struct lnstat_field *lf = fp->params[i].lf; 106 107 fprintf(of, "%*lu|", fp->params[i].print.width, lf->result); 108 } 109 fputc('\n', of); 110 } 111 112 static void print_json(FILE *of, const struct lnstat_file *lnstat_files, 113 const struct field_params *fp) 114 { 115 json_writer_t *jw = jsonw_new(of); 116 int i; 117 118 jsonw_start_object(jw); 119 for (i = 0; i < fp->num; i++) { 120 const struct lnstat_field *lf = fp->params[i].lf; 121 122 jsonw_uint_field(jw, lf->name, lf->result); 123 } 124 jsonw_end_object(jw); 125 jsonw_destroy(&jw); 126 } 127 128 /* find lnstat_field according to user specification */ 129 static int map_field_params(struct lnstat_file *lnstat_files, 130 struct field_params *fps, int interval) 131 { 132 int i, j = 0; 133 struct lnstat_file *lf; 134 135 /* no field specification on commandline, need to build default */ 136 if (!fps->num) { 137 for (lf = lnstat_files; lf; lf = lf->next) { 138 for (i = 0; i < lf->num_fields; i++) { 139 fps->params[j].lf = &lf->fields[i]; 140 fps->params[j].lf->file->interval.tv_sec = 141 interval; 142 if (!fps->params[j].print.width) 143 fps->params[j].print.width = 144 FIELD_WIDTH_DEFAULT; 145 146 if (++j >= MAX_FIELDS - 1) { 147 fprintf(stderr, 148 "WARN: MAX_FIELDS (%d) reached," 149 " 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] = malloc(HDR_LINE_LENGTH); 190 memset(th.hdr[i], 0, HDR_LINE_LENGTH); 191 } 192 193 for (i = 0; i < fps->num; i++) { 194 char *cname, *fname = fps->params[i].lf->name; 195 unsigned int width = fps->params[i].print.width; 196 197 snprintf(th.hdr[0]+ofs, width+2, "%*.*s|", width, width, 198 fps->params[i].lf->file->basename); 199 200 cname = fname; 201 for (h = 1; h < HDR_LINES; h++) { 202 if (cname - fname >= strlen(fname)) 203 snprintf(th.hdr[h]+ofs, width+2, 204 "%*.*s|", width, width, ""); 205 else { 206 th.num_lines = h+1; 207 snprintf(th.hdr[h]+ofs, width+2, 208 "%*.*s|", width, width, cname); 209 } 210 cname += width; 211 } 212 ofs += width+1; 213 } 214 /* fill in spaces */ 215 for (h = 1; h <= th.num_lines; h++) { 216 for (i = 0; i < ofs; i++) { 217 if (th.hdr[h][i] == '\0') 218 th.hdr[h][i] = ' '; 219 } 220 } 221 222 return &th; 223 } 224 225 static int print_hdr(FILE *of, struct table_hdr *th) 226 { 227 int i; 228 229 for (i = 0; i < th->num_lines; i++) { 230 fputs(th->hdr[i], of); 231 fputc('\n', of); 232 } 233 return 0; 234 } 235 236 237 int main(int argc, char **argv) 238 { 239 struct lnstat_file *lnstat_files; 240 const char *basename; 241 int i, c; 242 int interval = DEFAULT_INTERVAL; 243 int hdr = 2; 244 enum { 245 MODE_DUMP, 246 MODE_JSON, 247 MODE_NORMAL, 248 } mode = MODE_NORMAL; 249 unsigned long count = 0; 250 struct table_hdr *header; 251 static struct field_params fp; 252 int num_req_files = 0; 253 char *req_files[LNSTAT_MAX_FILES]; 254 255 /* backwards compatibility mode for old tools */ 256 basename = strrchr(argv[0], '/'); 257 if (basename) 258 basename += 1; /* name after slash */ 259 else 260 basename = argv[0]; /* no slash */ 261 262 if (!strcmp(basename, "rtstat")) { 263 /* rtstat compatibility mode */ 264 req_files[0] = "rt_cache"; 265 num_req_files = 1; 266 } else if (!strcmp(basename, "ctstat")) { 267 /* ctstat compatibility mode */ 268 req_files[0] = "ip_conntrack"; 269 num_req_files = 1; 270 } 271 272 while ((c = getopt_long(argc, argv,"Vc:djpf:h?i:k:s:w:", 273 opts, NULL)) != -1) { 274 int len = 0; 275 char *tmp, *tok; 276 277 switch (c) { 278 case 'c': 279 count = strtoul(optarg, NULL, 0); 280 break; 281 case 'd': 282 mode = MODE_DUMP; 283 break; 284 case 'j': 285 mode = MODE_JSON; 286 break; 287 case 'f': 288 req_files[num_req_files++] = strdup(optarg); 289 break; 290 case '?': 291 case 'h': 292 usage(argv[0], 0); 293 break; 294 case 'i': 295 sscanf(optarg, "%u", &interval); 296 break; 297 case 'k': 298 tmp = strdup(optarg); 299 if (!tmp) 300 break; 301 for (tok = strtok(tmp, ","); 302 tok; 303 tok = strtok(NULL, ",")) { 304 if (fp.num >= MAX_FIELDS) { 305 fprintf(stderr, 306 "WARN: too many keys" 307 " requested: (%d max)\n", 308 MAX_FIELDS); 309 break; 310 } 311 fp.params[fp.num++].name = tok; 312 } 313 break; 314 case 's': 315 sscanf(optarg, "%u", &hdr); 316 break; 317 case 'w': 318 tmp = strdup(optarg); 319 if (!tmp) 320 break; 321 i = 0; 322 for (tok = strtok(tmp, ","); 323 tok; 324 tok = strtok(NULL, ",")) { 325 len = strtoul(tok, NULL, 0); 326 if (len > FIELD_WIDTH_MAX) 327 len = FIELD_WIDTH_MAX; 328 fp.params[i].print.width = len; 329 i++; 330 } 331 if (i == 1) { 332 for (i = 0; i < MAX_FIELDS; i++) 333 fp.params[i].print.width = len; 334 } 335 break; 336 default: 337 usage(argv[0], 1); 338 break; 339 } 340 } 341 342 lnstat_files = lnstat_scan_dir(PROC_NET_STAT, num_req_files, 343 (const char **) req_files); 344 345 switch (mode) { 346 case MODE_DUMP: 347 lnstat_dump(stdout, lnstat_files); 348 break; 349 350 case MODE_NORMAL: 351 case MODE_JSON: 352 if (!map_field_params(lnstat_files, &fp, interval)) 353 exit(1); 354 355 header = build_hdr_string(lnstat_files, &fp, 80); 356 if (!header) 357 exit(1); 358 359 if (interval < 1 ) 360 interval = 1; 361 362 for (i = 0; i < count || !count; i++) { 363 lnstat_update(lnstat_files); 364 if (mode == MODE_JSON) 365 print_json(stdout, lnstat_files, &fp); 366 else { 367 if ((hdr > 1 && !(i % 20)) || 368 (hdr == 1 && i == 0)) 369 print_hdr(stdout, header); 370 print_line(stdout, lnstat_files, &fp); 371 } 372 fflush(stdout); 373 if (i < count - 1 || !count) 374 sleep(interval); 375 } 376 break; 377 } 378 379 return 1; 380 } 381
