ippool/libippool.c

   1 /* support functions for ip_pool modules */
   2
   3 #include <stdio.h>
   4 #include <string.h>
   5 #include <stdlib.h>
   6 #include <ctype.h>
   7
   8 #include <libippool/ip_pool_support.h>
   9
  10 void ip_pool_init(void)
  11 {
  12 }
  13
  14 ip_pool_t ip_pool_get_index(char *name)
  15 {
  16         FILE *fp;
  17         char buf[256];
  18
  19         if (isdigit(*name))
  20                 return atoi(name);
  21         fp = fopen(IPPOOL_CONF, "r");
  22         if (!fp) exit_error(PARAMETER_PROBLEM,
  23                         "cannot open %s - no pool names", IPPOOL_CONF);
  24         while (fgets(buf, sizeof(buf), fp)) {
  25                 char *p = strtok(buf, " \t\n");
  26                 ip_pool_t index;
  27
  28                 if (!p || *p == '#') continue;
  29                 index = atoi(p);
  30                 p = strtok(0, " \t\n");
  31                 if (p && 0 == strcmp(p, name)) {
  32                         fclose(fp);
  33                         return index;
  34                 }
  35         }
  36         exit_error(PARAMETER_PROBLEM,
  37                 "pool '%s' not found in %s\n", name, IPPOOL_CONF);
  38 }
  39
  40 char *ip_pool_get_name(char *buf, int size, ip_pool_t index, int numeric)
  41 {
  42         FILE *fp;
  43         int ok = 0;
  44
  45         /* make sure we have enough room, at least for a %d */
  46         if (size < 16)
  47                 exit_error(PARAMETER_PROBLEM,
  48                         "ip_pool_support:get_name buf too small (%d vs. 16)\n",
  49                         size);
  50         if (numeric)
  51                 goto do_numeric;
  52         fp = fopen(IPPOOL_CONF, "r");
  53         if (fp) {
  54                 while (fgets(buf, size, fp)) {
  55                         char *p = strtok(buf, " \t\n");
  56
  57                         if (!p || *p == '#') continue;
  58                         if (index != atoi(p)) continue;
  59                         p = strtok(0, " \t\n");
  60                         if (!p || *p == '#') continue;
  61                         memmove(buf, p, strlen(p)+1);
  62                         ok = 1;
  63                         break;
  64                 }
  65                 fclose(fp);
  66         }
  67         if (!ok) {
  68 do_numeric:
  69                 sprintf(buf, "%d", index);
  70         }
  71         return buf;
  72 }