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From FreeBSD misc/14850: When communicating with a BOOTP server,

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dhclient would fail to configure the interface and crash. Added check
for lease time option present before using that value.
This commit is contained in:
mjl 1999-11-15 15:50:16 +00:00
parent f25cd19a6a
commit 2c3c567c94
1 changed files with 8 additions and 4 deletions
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12
usr.sbin/dhcp/client/dhclient.c
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@ -56,7 +56,7 @@
#ifndef lint
static char ocopyright[] =
"$Id: dhclient.c,v 1.23 1999/08/24 03:25:31 enami Exp $ Copyright (c) 1995, 1996, 1997, 1998, 1999 The Internet Software Consortium. All rights reserved.\n";
"$Id: dhclient.c,v 1.24 1999/11/15 15:50:16 mjl Exp $ Copyright (c) 1995, 1996, 1997, 1998, 1999 The Internet Software Consortium. All rights reserved.\n";
#endif /* not lint */
#include "dhcpd.h"
@ -547,9 +547,13 @@ void dhcpack (packet)
cancel_timeout (send_request, ip);
/* Figure out the lease time. */
ip -> client -> new -> expiry =
getULong (ip -> client ->
new -> options [DHO_DHCP_LEASE_TIME].data);
if (ip -> client -> new -> options [DHO_DHCP_LEASE_TIME].len > 0)
ip -> client -> new -> expiry =
getULong (ip -> client ->
new -> options [DHO_DHCP_LEASE_TIME].data);
else
ip -> client -> new -> expiry = TIME_MAX;
/* A number that looks negative here is really just very large,
because the lease expiry offset is unsigned. */
if (ip -> client -> new -> expiry < 0)