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udhcpd: account for script delay in lease

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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>
This commit is contained in:
John Schroeder 2014-12-25 21:12:51 +01:00 committed by Denys Vlasenko
parent b9965077e5
commit 8074a6ca4d
1 changed files with 5 additions and 1 deletions
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6
networking/udhcp/dhcpc.c
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@ -1752,7 +1752,6 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv)
}
#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 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv)
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);