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DPP: Do not interpret unknown channel as missing channel list for NFC

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While the listed unknown operating class/channel number pairs need to be
ignored, that should be done in a manner than prevents the parsed
bootstrapping info from being used as if it had no channel list (i.e.,
allowing any channel) if there are no known operating class/channel
number pairs.

Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
This commit is contained in:
Jouni Malinen 2020-08-12 17:57:21 +03:00 committed by Jouni Malinen
parent ab676bc1fa
commit 574a8fa6c8
2 changed files with 4 additions and 2 deletions
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5
src/common/dpp.c
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@ -245,6 +245,7 @@ int dpp_parse_uri_chan_list(struct dpp_bootstrap_info *bi,
wpa_printf(MSG_DEBUG,
"DPP: URI channel-list: opclass=%d channel=%d ==> freq=%d",
opclass, channel, freq);
bi->channels_listed = true;
if (freq < 0) {
wpa_printf(MSG_DEBUG,
"DPP: Ignore unknown URI channel-list channel (opclass=%d channel=%d)",
@ -4030,11 +4031,11 @@ static int dpp_nfc_update_bi_channel(struct dpp_bootstrap_info *own_bi,
u8 op_class, channel;
char chan[20];
if (peer_bi->num_freq == 0)
if (peer_bi->num_freq == 0 && !peer_bi->channels_listed)
return 0; /* no channel preference/constraint */
for (i = 0; i < peer_bi->num_freq; i++) {
if (own_bi->num_freq == 0 ||
if ((own_bi->num_freq == 0 && !own_bi->channels_listed) ||
freq_included(own_bi->freq, own_bi->num_freq,
peer_bi->freq[i])) {
freq = peer_bi->freq[i];

1
src/common/dpp.h
View File

@ -153,6 +153,7 @@ struct dpp_bootstrap_info {
char *pk;
unsigned int freq[DPP_BOOTSTRAP_MAX_FREQ];
unsigned int num_freq;
bool channels_listed;
u8 version;
int own;
EVP_PKEY *pubkey;