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Tweak the minimum dhcp packet size to at least include the magic cookie

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field.  In practice, packets lacking any options at all are still invalid,
but they will fail later in the validation, so that is fine.
This commit is contained in:
Nicholas J. Kain 2011-06-11 04:09:05 -04:00
parent 6222d6ec0b
commit 7c6b07ca75
1 changed files with 3 additions and 3 deletions
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6
ndhc/packet.c
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@ -1,5 +1,5 @@
/* packet.c - send and react to DHCP message packets
* Time-stamp: <2011-06-10 13:56:28 njk>
* Time-stamp: <2011-06-11 04:07:56 njk>
*
* (c) 2004-2011 Nicholas J. Kain <njkain at gmail dot com>
* (c) 2001 Russ Dill <Russ.Dill@asu.edu>
@ -328,8 +328,8 @@ void handle_packet(struct client_state_t *cs)
if (len < 0)
return;
if (len < 32) {
log_line("Received DHCP packet with less than 32 chars -- ignoring");
if (len < DHCP_SIZE - 308) {
log_line("Packet is too short to contain magic cookie -- ignoring");
return;
}