misc/lnstat.c

   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         { "keys", 1, NULL, 'k' },
  49         { "subject", 1, NULL, 's' },
  50         { "width", 1, NULL, 'w' },
  51 };
  52
  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 --dump\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
  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 */
 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
 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
 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
 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