#include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "libbb_udhcp.h" #define REMAINING 0 #define ABSOLUTE 1 struct lease_t { unsigned char chaddr[16]; u_int32_t yiaddr; u_int32_t expires; }; #ifdef COMBINED_BINARY int dumpleases_main(int argc, char *argv[]) #else int main(int argc, char *argv[]) #endif { FILE *fp; int i, c, mode = REMAINING; long expires; char file[255] = "/var/lib/misc/udhcpd.leases"; struct lease_t lease; struct in_addr addr; static struct option options[] = { {"absolute", 0, 0, 'a'}, {"remaining", 0, 0, 'r'}, {"file", 1, 0, 'f'}, {"help", 0, 0, 'h'}, {0, 0, 0, 0} }; while (1) { int option_index = 0; c = getopt_long(argc, argv, "arf:h", options, &option_index); if (c == -1) break; switch (c) { case 'a': mode = ABSOLUTE; break; case 'r': mode = REMAINING; break; case 'f': strncpy(file, optarg, 255); file[254] = '\0'; break; case 'h': printf("Usage: dumpleases -f -[r|a]\n\n"); printf(" -f, --file=FILENAME Leases file to load\n"); printf(" -r, --remaining Interepret lease times as time remaing\n"); printf(" -a, --absolute Interepret lease times as expire time\n"); break; } } if (!(fp = fopen(file, "r"))) { perror("could not open input file"); return 0; } printf("Mac Address IP-Address Expires %s\n", mode == REMAINING ? "in" : "at"); /* "00:00:00:00:00:00 255.255.255.255 Wed Jun 30 21:49:08 1993" */ while (fread(&lease, sizeof(lease), 1, fp)) { for (i = 0; i < 6; i++) { printf("%02x", lease.chaddr[i]); if (i != 5) printf(":"); } addr.s_addr = lease.yiaddr; printf(" %-15s", inet_ntoa(addr)); expires = ntohl(lease.expires); printf(" "); if (mode == REMAINING) { if (!expires) printf("expired\n"); else { if (expires > 60*60*24) { printf("%ld days, ", expires / (60*60*24)); expires %= 60*60*24; } if (expires > 60*60) { printf("%ld hours, ", expires / (60*60)); expires %= 60*60; } if (expires > 60) { printf("%ld minutes, ", expires / 60); expires %= 60; } printf("%ld seconds\n", expires); } } else printf("%s", ctime(&expires)); } fclose(fp); return 0; }