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P2P: Validate the freq in p2p_group_add

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Add additional input verification for the frequency parameter in
p2p_group_add (and other P2P operations for that matter). Without this
verification invalid freq could be set and not handled properly.

Signed-hostap: Ilan Peer <ilan.peer@intel.com>
This commit is contained in:
Ilan Peer 2013-08-25 11:28:56 +03:00 committed by Jouni Malinen
parent 973622cd44
commit d393de1d27
1 changed files with 9 additions and 0 deletions
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9
src/p2p/p2p_utils.c
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@ -109,6 +109,9 @@ int p2p_freq_to_channel(unsigned int freq, u8 *op_class, u8 *channel)
{ {
/* TODO: more operating classes */ /* TODO: more operating classes */
if (freq >= 2412 && freq <= 2472) { if (freq >= 2412 && freq <= 2472) {
if ((freq - 2407) % 5)
return -1;
*op_class = 81; /* 2.407 GHz, channels 1..13 */ *op_class = 81; /* 2.407 GHz, channels 1..13 */
*channel = (freq - 2407) / 5; *channel = (freq - 2407) / 5;
return 0; return 0;
@ -121,12 +124,18 @@ int p2p_freq_to_channel(unsigned int freq, u8 *op_class, u8 *channel)
} }
if (freq >= 5180 && freq <= 5240) { if (freq >= 5180 && freq <= 5240) {
if ((freq - 5000) % 5)
return -1;
*op_class = 115; /* 5 GHz, channels 36..48 */ *op_class = 115; /* 5 GHz, channels 36..48 */
*channel = (freq - 5000) / 5; *channel = (freq - 5000) / 5;
return 0; return 0;
} }
if (freq >= 5745 && freq <= 5805) { if (freq >= 5745 && freq <= 5805) {
if ((freq - 5000) % 5)
return -1;
*op_class = 124; /* 5 GHz, channels 149..161 */ *op_class = 124; /* 5 GHz, channels 149..161 */
*channel = (freq - 5000) / 5; *channel = (freq - 5000) / 5;
return 0; return 0;