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 <laforge (at) gnumonks.org>\n"); 60 fprintf(stderr, "This program is free software licensed under GNU GPLv2\nwith ABSOLUTELY NO WARRANTY.\n\n"); 61 fprintf(stderr, "Parameters:\n"); 62 fprintf(stderr, "\t-V --version\t\tPrint Version of Program\n"); 63 fprintf(stderr, "\t-c --count <count>\t" 64 "Print <count> number of intervals\n"); 65 fprintf(stderr, "\t-d --dump\t\t" 66 "Dump list of available files/keys\n"); 67 fprintf(stderr, "\t-j --json\t\t" 68 "Display in JSON format\n"); 69 fprintf(stderr, "\t-f --file <file>\tStatistics file to use\n"); 70 fprintf(stderr, "\t-h --help\t\tThis help message\n"); 71 fprintf(stderr, "\t-i --interval <intv>\t" 72 "Set interval to 'intv' seconds\n"); 73 fprintf(stderr, "\t-k --keys k,k,k,...\tDisplay only keys specified\n"); 74 fprintf(stderr, "\t-s --subject [0-2]\tControl header printing:\n"); 75 fprintf(stderr, "\t\t\t\t0 = never\n"); 76 fprintf(stderr, "\t\t\t\t1 = once\n"); 77 fprintf(stderr, "\t\t\t\t2 = every 20 lines (default))\n"); 78 fprintf(stderr, "\t-w --width n,n,n,...\tWidth for each field\n"); 79 fprintf(stderr, "\n"); 80 81 exit(exit_code); 82 } 83 84 struct field_param { 85 const char *name; 86 struct lnstat_field *lf; 87 struct { 88 unsigned int width; 89 } print; 90 }; 91 92 struct field_params { 93 unsigned int num; 94 struct field_param params[MAX_FIELDS]; 95 }; 96 97 static void print_line(FILE *of, const struct lnstat_file *lnstat_files, 98 const struct field_params *fp) 99 { 100 int i; 101 102 for (i = 0; i < fp->num; i++) { 103 const struct lnstat_field *lf = fp->params[i].lf; 104 105 fprintf(of, "%*lu|", fp->params[i].print.width, lf->result); 106 } 107 fputc('\n', of); 108 } 109 110 static void print_json(FILE *of, const struct lnstat_file *lnstat_files, 111 const struct field_params *fp) 112 { 113 json_writer_t *jw = jsonw_new(of); 114 int i; 115 116 jsonw_start_object(jw); 117 for (i = 0; i < fp->num; i++) { 118 const struct lnstat_field *lf = fp->params[i].lf; 119 120 jsonw_uint_field(jw, lf->name, lf->result); 121 } 122 jsonw_end_object(jw); 123 jsonw_destroy(&jw); 124 } 125 126 /* find lnstat_field according to user specification */ 127 static int map_field_params(struct lnstat_file *lnstat_files, 128 struct field_params *fps, int interval) 129 { 130 int i, j = 0; 131 struct lnstat_file *lf; 132 133 /* no field specification on commandline, need to build default */ 134 if (!fps->num) { 135 for (lf = lnstat_files; lf; lf = lf->next) { 136 for (i = 0; i < lf->num_fields; i++) { 137 fps->params[j].lf = &lf->fields[i]; 138 fps->params[j].lf->file->interval.tv_sec = 139 interval; 140 if (!fps->params[j].print.width) 141 fps->params[j].print.width = 142 FIELD_WIDTH_DEFAULT; 143 144 if (++j >= MAX_FIELDS - 1) { 145 fprintf(stderr, 146 "WARN: MAX_FIELDS (%d) reached, truncating number of keys\n", 147 MAX_FIELDS); 148 goto full; 149 } 150 } 151 } 152 full: 153 fps->num = j; 154 return 1; 155 } 156 157 for (i = 0; i < fps->num; i++) { 158 fps->params[i].lf = lnstat_find_field(lnstat_files, 159 fps->params[i].name); 160 if (!fps->params[i].lf) { 161 fprintf(stderr, "Field `%s' unknown\n", 162 fps->params[i].name); 163 return 0; 164 } 165 fps->params[i].lf->file->interval.tv_sec = interval; 166 if (!fps->params[i].print.width) 167 fps->params[i].print.width = FIELD_WIDTH_DEFAULT; 168 } 169 return 1; 170 } 171 172 struct table_hdr { 173 int num_lines; 174 char *hdr[HDR_LINES]; 175 }; 176 177 static struct table_hdr *build_hdr_string(struct lnstat_file *lnstat_files, 178 struct field_params *fps, 179 int linewidth) 180 { 181 int h, i; 182 static struct table_hdr th; 183 int ofs = 0; 184 185 for (i = 0; i < HDR_LINES; i++) 186 th.hdr[i] = calloc(1, HDR_LINE_LENGTH); 187 188 for (i = 0; i < fps->num; i++) { 189 char *cname, *fname = fps->params[i].lf->name; 190 unsigned int width = fps->params[i].print.width; 191 192 snprintf(th.hdr[0]+ofs, width+2, "%*.*s|", width, width, 193 fps->params[i].lf->file->basename); 194 195 cname = fname; 196 for (h = 1; h < HDR_LINES; h++) { 197 if (cname - fname >= strlen(fname)) 198 snprintf(th.hdr[h]+ofs, width+2, 199 "%*.*s|", width, width, ""); 200 else { 201 th.num_lines = h+1; 202 snprintf(th.hdr[h]+ofs, width+2, 203 "%*.*s|", width, width, cname); 204 } 205 cname += width; 206 } 207 ofs += width+1; 208 } 209 /* fill in spaces */ 210 for (h = 1; h <= th.num_lines; h++) { 211 for (i = 0; i < ofs; i++) { 212 if (th.hdr[h][i] == '\0') 213 th.hdr[h][i] = ' '; 214 } 215 } 216 217 return &th; 218 } 219 220 static int print_hdr(FILE *of, struct table_hdr *th) 221 { 222 int i; 223 224 for (i = 0; i < th->num_lines; i++) { 225 fputs(th->hdr[i], of); 226 fputc('\n', of); 227 } 228 return 0; 229 } 230 231 232 int main(int argc, char **argv) 233 { 234 struct lnstat_file *lnstat_files; 235 const char *basename; 236 int i, c; 237 int interval = DEFAULT_INTERVAL; 238 int hdr = 2; 239 enum { 240 MODE_DUMP, 241 MODE_JSON, 242 MODE_NORMAL, 243 } mode = MODE_NORMAL; 244 unsigned long count = 0; 245 struct table_hdr *header; 246 static struct field_params fp; 247 int num_req_files = 0; 248 char *req_files[LNSTAT_MAX_FILES]; 249 250 /* backwards compatibility mode for old tools */ 251 basename = strrchr(argv[0], '/'); 252 if (basename) 253 basename += 1; /* name after slash */ 254 else 255 basename = argv[0]; /* no slash */ 256 257 if (!strcmp(basename, "rtstat")) { 258 /* rtstat compatibility mode */ 259 req_files[0] = "rt_cache"; 260 num_req_files = 1; 261 } else if (!strcmp(basename, "ctstat")) { 262 /* ctstat compatibility mode */ 263 req_files[0] = "ip_conntrack"; 264 num_req_files = 1; 265 } 266 267 while ((c = getopt_long(argc, argv, "Vc:djpf:h?i:k:s:w:", 268 opts, NULL)) != -1) { 269 int len = 0; 270 char *tmp, *tok; 271 272 switch (c) { 273 case 'c': 274 count = strtoul(optarg, NULL, 0); 275 break; 276 case 'd': 277 mode = MODE_DUMP; 278 break; 279 case 'j': 280 mode = MODE_JSON; 281 break; 282 case 'f': 283 req_files[num_req_files++] = strdup(optarg); 284 break; 285 case '?': 286 case 'h': 287 usage(argv[0], 0); 288 break; 289 case 'i': 290 sscanf(optarg, "%u", &interval); 291 break; 292 case 'k': 293 tmp = strdup(optarg); 294 if (!tmp) 295 break; 296 for (tok = strtok(tmp, ","); 297 tok; 298 tok = strtok(NULL, ",")) { 299 if (fp.num >= MAX_FIELDS) { 300 fprintf(stderr, 301 "WARN: too many keys requested: (%d max)\n", 302 MAX_FIELDS); 303 break; 304 } 305 fp.params[fp.num++].name = tok; 306 } 307 break; 308 case 's': 309 sscanf(optarg, "%u", &hdr); 310 break; 311 case 'w': 312 tmp = strdup(optarg); 313 if (!tmp) 314 break; 315 i = 0; 316 for (tok = strtok(tmp, ","); 317 tok; 318 tok = strtok(NULL, ",")) { 319 len = strtoul(tok, NULL, 0); 320 if (len > FIELD_WIDTH_MAX) 321 len = FIELD_WIDTH_MAX; 322 fp.params[i].print.width = len; 323 i++; 324 } 325 if (i == 1) { 326 for (i = 0; i < MAX_FIELDS; i++) 327 fp.params[i].print.width = len; 328 } 329 break; 330 default: 331 usage(argv[0], 1); 332 break; 333 } 334 } 335 336 lnstat_files = lnstat_scan_dir(PROC_NET_STAT, num_req_files, 337 (const char **) req_files); 338 339 switch (mode) { 340 case MODE_DUMP: 341 lnstat_dump(stdout, lnstat_files); 342 break; 343 344 case MODE_NORMAL: 345 case MODE_JSON: 346 if (!map_field_params(lnstat_files, &fp, interval)) 347 exit(1); 348 349 header = build_hdr_string(lnstat_files, &fp, 80); 350 if (!header) 351 exit(1); 352 353 if (interval < 1) 354 interval = 1; 355 356 for (i = 0; i < count || !count; i++) { 357 lnstat_update(lnstat_files); 358 if (mode == MODE_JSON) 359 print_json(stdout, lnstat_files, &fp); 360 else { 361 if ((hdr > 1 && !(i % 20)) || 362 (hdr == 1 && i == 0)) 363 print_hdr(stdout, header); 364 print_line(stdout, lnstat_files, &fp); 365 } 366 fflush(stdout); 367 if (i < count - 1 || !count) 368 sleep(interval); 369 } 370 break; 371 } 372 373 return 1; 374 } 375
