Roy Walker writes:

Here is a patch against the current subversion repository, that makes
udhcpc have an adjustable timeout.  Works for both foreground and before
it drops to the background.  This brings it more in-line with ISC dhcpc.

Use like so:
udhcpc --timeout=10 ...
or
udhcpc -T 10 ...

Still shooting for 1.1.1 this month?  Would really be great if you could
get this in that release.

Please give credit to Paul Pacheco - ppacheco@gmail.com.

2 files changed, 10 insertions, 2 deletions

diff --git a/networking/udhcp/dhcpc.c b/networking/udhcp/dhcpc.c
index 7e7f94a5a..0c85eca83 100644
--- a/networking/udhcp/dhcpc.c
+++ b/networking/udhcp/dhcpc.c
@@ -59,6 +59,7 @@ struct client_config_t client_config = {
         .fqdn = NULL,
         .ifindex = 0,
         .retries = 3,
+        .timeout = 3,
         .arp = "\0\0\0\0\0\0",          /* appease gcc-3.0 */
 };
 
@@ -84,6 +85,8 @@ static void ATTRIBUTE_NORETURN show_usage(void)
 "  -r, --request=IP                IP address to request (default: none)\n"
 "  -s, --script=file               Run file at dhcp events (default:\n"
 "                                  " DEFAULT_SCRIPT ")\n"
+"  -T, --timeout=seconds           Try to get the lease for the amount of\n"
+"                                  seconds (default: 3)\n"
 "  -v, --version                   Display version\n"
         );
         exit(0);
@@ -202,6 +205,7 @@ int main(int argc, char *argv[])
                 {"quit",        no_argument,            0, 'q'},
                 {"request",     required_argument,      0, 'r'},
                 {"script",      required_argument,      0, 's'},
+                {"timeout",     required_argument,      0, 'T'},
                 {"version",     no_argument,            0, 'v'},
                 {"retries",     required_argument,      0, 't'},                
                 {0, 0, 0, 0}
@@ -210,7 +214,7 @@ int main(int argc, char *argv[])
         /* get options */
         while (1) {
                 int option_index = 0;
-                c = getopt_long(argc, argv, "c:CV:fbH:h:F:i:np:qr:s:t:v", arg_options, &option_index);
+                c = getopt_long(argc, argv, "c:CV:fbH:h:F:i:np:qr:s:T:t:v", arg_options, &option_index);
                 if (c == -1) break;
 
                 switch (c) {
@@ -286,6 +290,9 @@ int main(int argc, char *argv[])
                 case 's':
                         client_config.script = optarg;
                         break;
+                case 'T':
+                        client_config.timeout = atoi(optarg);
+                        break;
                 case 't':
                         client_config.retries = atoi(optarg);
                         break;
@@ -365,7 +372,7 @@ int main(int argc, char *argv[])
                                         /* send discover packet */
                                         send_discover(xid, requested_ip); /* broadcast */
 
-                                        timeout = now + ((packet_num == 2) ? 4 : 2);
+                                        timeout = now + client_config.timeout;
                                         packet_num++;
                                 } else {
                                         run_script(NULL, "leasefail");
diff --git a/networking/udhcp/dhcpc.h b/networking/udhcp/dhcpc.h
index 808e91924..80c3fc2f8 100644
--- a/networking/udhcp/dhcpc.h
+++ b/networking/udhcp/dhcpc.h
@@ -30,6 +30,7 @@ struct client_config_t {
         uint8_t *fqdn;                  /* Optional fully qualified domain name to use */
         int ifindex;                    /* Index number of the interface to use */
         int retries;                    /* Max number of request packets */        
+        int timeout;                    /* Number of seconds to try to get a lease */
         uint8_t arp[6];                 /* Our arp address */
 };