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              64
  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
  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
  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                                 j++;
 125                         }
 126                 }
 127                 fps->num = j;
 128                 return 1;
 129         }
 130
 131         for (i = 0; i < fps->num; i++) {
 132                 fps->params[i].lf = lnstat_find_field(lnstat_files,
 133                                                       fps->params[i].name);
 134                 if (!fps->params[i].lf) {
 135                         fprintf(stderr, "Field `%s' unknown\n",
 136                                 fps->params[i].name);
 137                         return 0;
 138                 }
 139                 fps->params[i].lf->file->interval.tv_sec = interval;
 140                 if (!fps->params[i].print.width)
 141                         fps->params[i].print.width = FIELD_WIDTH_DEFAULT;
 142         }
 143         return 1;
 144 }
 145
 146 struct table_hdr {
 147         int num_lines;
 148         char *hdr[HDR_LINES];
 149 };
 150
 151 static struct table_hdr *build_hdr_string(struct lnstat_file *lnstat_files,
 152                                           struct field_params *fps,
 153                                           int linewidth)
 154 {
 155         int h,i;
 156         static struct table_hdr th;
 157         int ofs = 0;
 158
 159         for (i = 0; i < HDR_LINES; i++) {
 160                 th.hdr[i] = malloc(HDR_LINE_LENGTH);
 161                 memset(th.hdr[i], 0, sizeof(th.hdr[i]));
 162         }
 163
 164         for (i = 0; i < fps->num; i++) {
 165                 char *cname, *fname = fps->params[i].lf->name;
 166                 char fmt[12];
 167                 unsigned int width = fps->params[i].print.width;
 168
 169                 snprintf(fmt, sizeof(fmt)-1, "%%%u.%us|", width, width);
 170
 171                 snprintf(th.hdr[0]+ofs, width+2, fmt,
 172                          fps->params[i].lf->file->basename);
 173
 174                 cname = fname;
 175                 for (h = 1; h < HDR_LINES; h++) {
 176                         if (cname - fname >= strlen(fname))
 177                                 snprintf(th.hdr[h]+ofs, width+2, fmt, "");
 178                         else {
 179                                 th.num_lines = h+1;
 180                                 snprintf(th.hdr[h]+ofs, width+2, fmt, cname);
 181                         }
 182                         cname += width;
 183                 }
 184                 ofs += width+1;
 185         }
 186         /* fill in spaces */
 187         for (h = 1; h <= th.num_lines; h++) {
 188                 for (i = 0; i < ofs; i++) {
 189                         if (th.hdr[h][i] == '\0')
 190                                 th.hdr[h][i] = ' ';
 191                 }
 192         }
 193
 194         return &th;
 195 }
 196
 197 static int print_hdr(FILE *of, struct table_hdr *th)
 198 {
 199         int i;
 200
 201         for (i = 0; i < th->num_lines; i++) {
 202                 fputs(th->hdr[i], of);
 203                 fputc('\n', of);
 204         }
 205         return 0;
 206 }
 207
 208
 209 int main(int argc, char **argv)
 210 {
 211         struct lnstat_file *lnstat_files;
 212         const char *basename;
 213         int c;
 214         int interval = DEFAULT_INTERVAL;
 215         int hdr = 2;
 216         enum {
 217                 MODE_DUMP,
 218                 MODE_NORMAL,
 219         } mode = MODE_NORMAL;
 220
 221         unsigned long count = 1;
 222         static struct field_params fp;
 223         int num_req_files = 0;
 224         char *req_files[LNSTAT_MAX_FILES];
 225
 226         /* backwards compatibility mode for old tools */
 227         basename = strrchr(argv[0], '/');
 228         if (basename)
 229                 basename += 1;    /* name after slash */
 230         else
 231                 basename = argv[0]; /* no slash */
 232
 233         if (!strcmp(basename, "rtstat")) {
 234                 /* rtstat compatibility mode */
 235                 req_files[0] = "rt_cache";
 236                 num_req_files = 1;
 237         } else if (!strcmp(basename, "ctstat")) {
 238                 /* ctstat compatibility mode */
 239                 req_files[0] = "ip_conntrack";
 240                 num_req_files = 1;
 241         }
 242
 243         while ((c = getopt_long(argc, argv,"Vc:df:h?i:k:s:w:",
 244                                 opts, NULL)) != -1) {
 245                 int i, len = 0;
 246                 char *tmp, *tok;
 247
 248                 switch (c) {
 249                         case 'c':
 250                                 count = strtoul(optarg, NULL, 0);
 251                                 break;
 252                         case 'd':
 253                                 mode = MODE_DUMP;
 254                                 break;
 255                         case 'f':
 256                                 req_files[num_req_files++] = strdup(optarg);
 257                                 break;
 258                         case '?':
 259                         case 'h':
 260                                 usage(argv[0], 0);
 261                                 break;
 262                         case 'i':
 263                                 sscanf(optarg, "%u", &interval);
 264                                 break;
 265                         case 'k':
 266                                 tmp = strdup(optarg);
 267                                 if (!tmp)
 268                                         break;
 269                                 for (tok = strtok(tmp, ",");
 270                                      tok;
 271                                      tok = strtok(NULL, ",")) {
 272                                         if (fp.num >= MAX_FIELDS)
 273                                                 break;
 274                                         fp.params[fp.num++].name = tok;
 275                                 }
 276                                 break;
 277                         case 's':
 278                                 sscanf(optarg, "%u", &hdr);
 279                                 break;
 280                         case 'w':
 281                                 tmp = strdup(optarg);
 282                                 if (!tmp)
 283                                         break;
 284                                 i = 0;
 285                                 for (tok = strtok(tmp, ",");
 286                                      tok;
 287                                      tok = strtok(NULL, ",")) {
 288                                         len  = strtoul(tok, NULL, 0);
 289                                         if (len > FIELD_WIDTH_MAX)
 290                                                 len = FIELD_WIDTH_MAX;
 291                                         fp.params[i].print.width = len;
 292                                         i++;
 293                                 }
 294                                 if (i == 1) {
 295                                         for (i = 0; i < MAX_FIELDS; i++)
 296                                                 fp.params[i].print.width = len;
 297                                 }
 298                                 break;
 299                         default:
 300                                 usage(argv[0], 1);
 301                                 break;
 302                 }
 303         }
 304
 305         lnstat_files = lnstat_scan_dir(PROC_NET_STAT, num_req_files,
 306                                        (const char **) req_files);
 307
 308         switch (mode) {
 309                 int i;
 310                 struct table_hdr *header;
 311         case MODE_DUMP:
 312                 lnstat_dump(stderr, lnstat_files);
 313                 break;
 314         case MODE_NORMAL:
 315
 316                 if (!map_field_params(lnstat_files, &fp, interval))
 317                         exit(1);
 318
 319                 header = build_hdr_string(lnstat_files, &fp, 80);
 320                 if (!header)
 321                         exit(1);
 322
 323                 if (interval < 1 )
 324                         interval=1;
 325
 326                 for (i = 0; i < count; i++) {
 327                         if  ((hdr > 1 && (! (i % 20))) || (hdr == 1 && i == 0))
 328                                 print_hdr(stdout, header);
 329                         lnstat_update(lnstat_files);
 330                         print_line(stdout, lnstat_files, &fp);
 331                         sleep(interval);
 332                 }
 333         }
 334
 335         return 1;
 336 }
 337