udhcp: add PXELINUX config file option (code 209) definition

[oweals/busybox.git] / networking / udhcp / dumpleases.c

diff --git a/networking/udhcp/dumpleases.c b/networking/udhcp/dumpleases.c
index 2d16ec160f596fd29a646e0f1d1f859050b3df18..64cd73ec774638cdfbde3995ac4a2a7ea867960e 100644 (file)
--- a/networking/udhcp/dumpleases.c
+++ b/networking/udhcp/dumpleases.c
@@ -1,10 +1,26 @@
 /* vi: set sw=4 ts=4: */
 /*
- * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
  */
 
+//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:       )
+
 #include "common.h"
 #include "dhcpd.h"
+#include "unicode.h"
 
 int dumpleases_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 int dumpleases_main(int argc UNUSED_PARAM, char **argv)
@@ -12,18 +28,17 @@ int dumpleases_main(int argc UNUSED_PARAM, char **argv)
        int fd;
        int i;
        unsigned opt;
-       leasetime_t expires;
-       leasetime_t curr;
+       int64_t written_at, curr, expires_abs;
        const char *file = LEASES_FILE;
-       struct dhcpOfferedAddr lease;
+       struct dyn_lease lease;
        struct in_addr addr;
 
        enum {
-               OPT_a   = 0x1,  // -a
-               OPT_r   = 0x2,  // -r
-               OPT_f   = 0x4,  // -f
+               OPT_a = 0x1, // -a
+               OPT_r = 0x2, // -r
+               OPT_f = 0x4, // -f
        };
-#if ENABLE_GETOPT_LONG
+#if ENABLE_LONG_OPTS
        static const char dumpleases_longopts[] ALIGN1 =
                "absolute\0"  No_argument       "a"
                "remaining\0" No_argument       "r"
@@ -32,30 +47,49 @@ int dumpleases_main(int argc UNUSED_PARAM, char **argv)
 
        applet_long_options = dumpleases_longopts;
 #endif
+       init_unicode();
+
        opt_complementary = "=0:a--r:r--a";
        opt = getopt32(argv, "arf:", &file);
 
        fd = xopen(file, O_RDONLY);
 
-       printf("Mac Address       IP-Address      Expires %s\n", (opt & OPT_a) ? "at" : "in");
-       /*     "00:00:00:00:00:00 255.255.255.255 Wed Jun 30 21:49:08 1993" */
+       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(fmt, lease.chaddr[i]);
+                       printf(fmt, lease.lease_mac[i]);
                        fmt = ":%02x";
                }
-               addr.s_addr = lease.yiaddr;
-               printf(" %-15s ", inet_ntoa(addr));
-               if (lease.expires == 0) {
+               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;
                }
-               expires = ntohl(lease.expires);
                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;
@@ -63,7 +97,7 @@ int dumpleases_main(int argc UNUSED_PARAM, char **argv)
                                printf("%u days ", d);
                        printf("%02u:%02u:%02u\n", h, m, (unsigned)expires);
                } else { /* -a */
-                       time_t t = expires + curr;
+                       time_t t = expires_abs;
                        fputs(ctime(&t), stdout);
                }
        }