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Diffstat (limited to 'networking/udhcp/dumpleases.c')
-rw-r--r--networking/udhcp/dumpleases.c112
1 files changed, 112 insertions, 0 deletions
diff --git a/networking/udhcp/dumpleases.c b/networking/udhcp/dumpleases.c
new file mode 100644
index 0000000..2b19d97
--- /dev/null
+++ b/networking/udhcp/dumpleases.c
@@ -0,0 +1,112 @@
+#include <fcntl.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <sys/wait.h>
+#include <sys/stat.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+#include <netinet/in.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <unistd.h>
+#include <syslog.h>
+#include <signal.h>
+#include <errno.h>
+#include <getopt.h>
+#include <time.h>
+
+#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 BB_VER
+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 <file> -[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;
+}