git.maemo.org Git - udhcp/blob - dumpleases.c

   1 #include <fcntl.h>
   2 #include <string.h>
   3 #include <stdlib.h>
   4 #include <stdio.h>
   5 #include <sys/wait.h>
   6 #include <arpa/inet.h>
   7 #include <netdb.h>
   8 #include <netinet/in.h>
   9 #include <stdio.h>
  10 #include <sys/socket.h>
  11 #include <unistd.h>
  12 #include <getopt.h>
  13 #include <time.h>
  14
  15 #include "dhcpd.h"
  16 #include "leases.h"
  17 #include "libbb_udhcp.h"
  18
  19 #define REMAINING 0
  20 #define ABSOLUTE 1
  21
  22
  23 #ifndef IN_BUSYBOX
  24 static void __attribute__ ((noreturn)) show_usage(void)
  25 {
  26         printf(
  27 "Usage: dumpleases -f <file> -[r|a]\n\n"
  28 "  -f, --file=FILENAME             Leases file to load\n"
  29 "  -r, --remaining                 Interepret lease times as time remaing\n"
  30 "  -a, --absolute                  Interepret lease times as expire time\n");
  31         exit(0);
  32 }
  33 #else
  34 #define show_usage bb_show_usage
  35 #endif
  36
  37
  38 #ifdef IN_BUSYBOX
  39 int dumpleases_main(int argc, char *argv[])
  40 #else
  41 int main(int argc, char *argv[])
  42 #endif
  43 {
  44         FILE *fp;
  45         int i, c, mode = REMAINING;
  46         long expires;
  47         const char *file = LEASES_FILE;
  48         struct dhcpOfferedAddr lease;
  49         struct in_addr addr;
  50
  51         static const struct option options[] = {
  52                 {"absolute", 0, 0, 'a'},
  53                 {"remaining", 0, 0, 'r'},
  54                 {"file", 1, 0, 'f'},
  55                 {0, 0, 0, 0}
  56         };
  57
  58         while (1) {
  59                 int option_index = 0;
  60                 c = getopt_long(argc, argv, "arf:", options, &option_index);
  61                 if (c == -1) break;
  62
  63                 switch (c) {
  64                 case 'a': mode = ABSOLUTE; break;
  65                 case 'r': mode = REMAINING; break;
  66                 case 'f':
  67                         file = optarg;
  68                         break;
  69                 default:
  70                         show_usage();
  71                 }
  72         }
  73
  74         fp = xfopen(file, "r");
  75
  76         printf("Mac Address       IP-Address      Expires %s\n", mode == REMAINING ? "in" : "at");
  77         /*     "00:00:00:00:00:00 255.255.255.255 Wed Jun 30 21:49:08 1993" */
  78         while (fread(&lease, sizeof(lease), 1, fp)) {
  79
  80                 for (i = 0; i < 6; i++) {
  81                         printf("%02x", lease.chaddr[i]);
  82                         if (i != 5) printf(":");
  83                 }
  84                 addr.s_addr = lease.yiaddr;
  85                 printf(" %-15s", inet_ntoa(addr));
  86                 expires = ntohl(lease.expires);
  87                 printf(" ");
  88                 if (mode == REMAINING) {
  89                         if (!expires) printf("expired\n");
  90                         else {
  91                                 if (expires > 60*60*24) {
  92                                         printf("%ld days, ", expires / (60*60*24));
  93                                         expires %= 60*60*24;
  94                                 }
  95                                 if (expires > 60*60) {
  96                                         printf("%ld hours, ", expires / (60*60));
  97                                         expires %= 60*60;
  98                                 }
  99                                 if (expires > 60) {
 100                                         printf("%ld minutes, ", expires / 60);
 101                                         expires %= 60;
 102                                 }
 103                                 printf("%ld seconds\n", expires);
 104                         }
 105                 } else printf("%s", ctime(&expires));
 106         }
 107         fclose(fp);
 108
 109         return 0;
 110 }