-#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>
+/* vi: set sw=4 ts=4: */
+/*
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
+ */
-#include "libbb_udhcp.h"
+//usage:#define dumpleases_trivial_usage
+//usage: "[-r|-a] [-f LEASEFILE]"
+//usage:#define dumpleases_full_usage "\n\n"
+//usage: "Display DHCP leases granted by udhcpd\n"
+//usage: IF_LONG_OPTS(
+//usage: "\n -f,--file=FILE Lease file"
+//usage: "\n -r,--remaining Show remaining time"
+//usage: "\n -a,--absolute Show expiration time"
+//usage: )
+//usage: IF_NOT_LONG_OPTS(
+//usage: "\n -f FILE Lease file"
+//usage: "\n -r Show remaining time"
+//usage: "\n -a Show expiration time"
+//usage: )
-#define REMAINING 0
-#define ABSOLUTE 1
+#include "common.h"
+#include "dhcpd.h"
+#include "unicode.h"
-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
+int dumpleases_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int dumpleases_main(int argc UNUSED_PARAM, char **argv)
{
- FILE *fp;
- int i, c, mode = REMAINING;
- long expires;
- char file[255] = "/var/lib/misc/udhcpd.leases";
- struct lease_t lease;
+ int fd;
+ int i;
+ unsigned opt;
+ int64_t written_at, curr, expires_abs;
+ const char *file = LEASES_FILE;
+ struct dyn_lease 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}
+
+ enum {
+ OPT_a = 0x1, // -a
+ OPT_r = 0x2, // -r
+ OPT_f = 0x4, // -f
};
+#if ENABLE_LONG_OPTS
+ static const char dumpleases_longopts[] ALIGN1 =
+ "absolute\0" No_argument "a"
+ "remaining\0" No_argument "r"
+ "file\0" Required_argument "f"
+ ;
- 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;
- }
+ applet_long_options = dumpleases_longopts;
+#endif
+ init_unicode();
+
+ opt_complementary = "=0:a--r:r--a";
+ opt = getopt32(argv, "arf:", &file);
- 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)) {
+ fd = xopen(file, O_RDONLY);
+ printf("Mac Address IP Address Host Name Expires %s\n", (opt & OPT_a) ? "at" : "in");
+ /* "00:00:00:00:00:00 255.255.255.255 ABCDEFGHIJKLMNOPQRS Wed Jun 30 21:49:08 1993" */
+ /* "123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 */
+
+ xread(fd, &written_at, sizeof(written_at));
+ written_at = SWAP_BE64(written_at);
+ curr = time(NULL);
+ if (curr < written_at)
+ written_at = curr; /* lease file from future! :) */
+
+ while (full_read(fd, &lease, sizeof(lease)) == sizeof(lease)) {
+ const char *fmt = ":%02x" + 1;
for (i = 0; i < 6; i++) {
- printf("%02x", lease.chaddr[i]);
- if (i != 5) printf(":");
+ printf(fmt, lease.lease_mac[i]);
+ fmt = ":%02x";
+ }
+ addr.s_addr = lease.lease_nip;
+#if ENABLE_UNICODE_SUPPORT
+ {
+ char *uni_name = unicode_conv_to_printable_fixedwidth(/*NULL,*/ lease.hostname, 19);
+ printf(" %-16s%s ", inet_ntoa(addr), uni_name);
+ free(uni_name);
+ }
+#else
+ /* actually, 15+1 and 19+1, +1 is a space between columns */
+ /* lease.hostname is char[20] and is always NUL terminated */
+ printf(" %-16s%-20s", inet_ntoa(addr), lease.hostname);
+#endif
+ expires_abs = ntohl(lease.expires) + written_at;
+ if (expires_abs <= curr) {
+ puts("expired");
+ continue;
+ }
+ if (!(opt & OPT_a)) { /* no -a */
+ unsigned d, h, m;
+ unsigned expires = expires_abs - curr;
+ d = expires / (24*60*60); expires %= (24*60*60);
+ h = expires / (60*60); expires %= (60*60);
+ m = expires / 60; expires %= 60;
+ if (d)
+ printf("%u days ", d);
+ printf("%02u:%02u:%02u\n", h, m, (unsigned)expires);
+ } else { /* -a */
+ time_t t = expires_abs;
+ fputs(ctime(&t), stdout);
}
- 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);
-
+ /* close(fd); */
+
return 0;
}