udhcpd: account for script delay in lease
Prevent nasty surprises if script runs longer than lease time / 2.
Signed-off-by: John Schroeder <jschroed@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/networking/udhcp/dhcpc.c b/networking/udhcp/dhcpc.c
index a34829c..9d3d1a3 100644
--- a/networking/udhcp/dhcpc.c
+++ b/networking/udhcp/dhcpc.c
@@ -1752,7 +1752,6 @@
}
#endif
/* enter bound state */
- timeout = lease_seconds / 2;
temp_addr.s_addr = packet.yiaddr;
bb_info_msg("Lease of %s obtained, lease time %u",
inet_ntoa(temp_addr), (unsigned)lease_seconds);
@@ -1761,6 +1760,11 @@
start = monotonic_sec();
udhcp_run_script(&packet, state == REQUESTING ? "bound" : "renew");
already_waited_sec = (unsigned)monotonic_sec() - start;
+ timeout = lease_seconds / 2;
+ if ((unsigned)timeout < already_waited_sec) {
+ /* Something went wrong. Back to discover state */
+ timeout = already_waited_sec = 0;
+ }
state = BOUND;
change_listen_mode(LISTEN_NONE);