add back in udhcp support

1 files changed, 114 insertions, 0 deletions

diff --git a/networking/udhcp/dumpleases.c b/networking/udhcp/dumpleases.c
new file mode 100644
index 0000000..c0c58ee
--- /dev/null
+++ b/networking/udhcp/dumpleases.c
@@ -0,0 +1,114 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
+ */
+#include <fcntl.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <sys/wait.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+#include <netinet/in.h>
+#include <stdio.h>
+#include <sys/socket.h>
+#include <unistd.h>
+#include <getopt.h>
+#include <time.h>
+
+#include "dhcpd.h"
+#include "leases.h"
+#include "libbb_udhcp.h"
+
+#define REMAINING 0
+#define ABSOLUTE 1
+
+
+#ifndef IN_BUSYBOX
+static void ATTRIBUTE_NORETURN show_usage(void)
+{
+	printf(
+"Usage: dumpleases -f <file> -[r|a]\n\n"
+"  -f, --file=FILENAME             Leases file to load\n"
+"  -r, --remaining                 Interepret lease times as time remaing\n"
+"  -a, --absolute                  Interepret lease times as expire time\n");
+	exit(0);
+}
+#else
+#define show_usage bb_show_usage
+#endif
+
+
+#ifdef IN_BUSYBOX
+int dumpleases_main(int argc, char *argv[])
+#else
+int main(int argc, char *argv[])
+#endif
+{
+	FILE *fp;
+	int i, c, mode = REMAINING;
+	long expires;
+	const char *file = LEASES_FILE;
+	struct dhcpOfferedAddr lease;
+	struct in_addr addr;
+
+	static const struct option options[] = {
+		{"absolute", 0, 0, 'a'},
+		{"remaining", 0, 0, 'r'},
+		{"file", 1, 0, 'f'},
+		{0, 0, 0, 0}
+	};
+
+	while (1) {
+		int option_index = 0;
+		c = getopt_long(argc, argv, "arf:", options, &option_index);
+		if (c == -1) break;
+
+		switch (c) {
+		case 'a': mode = ABSOLUTE; break;
+		case 'r': mode = REMAINING; break;
+		case 'f':
+			file = optarg;
+			break;
+		default:
+			show_usage();
+		}
+	}
+
+	fp = xfopen(file, "r");
+
+	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;
+}