Enable dhclient to poll the interface state and send only

requests if the interface has an active link. This is a
great benefit if you often change networks with your laptop
and you do not like to kill/restart dhclient all the time.
Changes are automatically detected and the link is refreshed.

The change allows us to start dhclient in background mode
Enable dhclient to poll the interface state and send only
requests if the interface has an active link. This is a
great benefit if you often change networks with your laptop
and you do not like to kill/restart dhclient all the time.
Changes are automatically detected and the link is refreshed.

The change allows us to start dhclient in background mode
while the network cable is not plugged in.

To control the polling interval, the option -i has been
introduced. It takes seconds as parameter, the minimum is
one second, the default is five seconds.

Polling is done in seconds, not microseconds, because dhclient
does internally work with timeouts in seconds.

This change will be part of the next major ISC-dhcpd release.

Tested by:	bms, imp, and many many others.
Reviewed by:	murray, eivind, dhclient folks

1 files changed, 9 insertions, 0 deletions

diff --git a/contrib/isc-dhcp/includes/dhcpd.h b/contrib/isc-dhcp/includes/dhcpd.h
index 891678c..0c98e82 100644
--- a/contrib/isc-dhcp/includes/dhcpd.h
+++ b/contrib/isc-dhcp/includes/dhcpd.h
@@ -41,6 +41,10 @@
  * ``http://www.nominum.com''.
  */
 
+#ifndef lint
+"$FreeBSD$\n";
+#endif /* not lint */
+
 #ifndef __CYGWIN32__
 #include <sys/types.h>
 #include <netinet/in.h>
@@ -778,6 +782,8 @@ struct interface_info {
 	unsigned remote_id_len;		/* Length of Remote ID. */
 
 	char name [IFNAMSIZ];		/* Its name... */
+	int linkstatus;			/* Link status */
+	int ieee802;			/* True if media is ieee802 */
 	int index;			/* Its index. */
 	int rfdesc;			/* Its read file descriptor. */
 	int wfdesc;			/* Its write file descriptor, if
@@ -1853,6 +1859,9 @@ void send_release PROTO ((void *));
 void send_decline PROTO ((void *));
 
 void state_reboot PROTO ((void *));
+#ifdef ENABLE_POLLING_MODE
+void state_link PROTO (());
+#endif
 void state_init PROTO ((void *));
 void state_selecting PROTO ((void *));
 void state_requesting PROTO ((void *));