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P2P: Do not reply to Probe Request frame indicating only 802.11b rates

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Per P2P specification 2.4.1, P2P Device shall shall not respond to
Probe Request frames that indicate support for only 802.11b rates.
This commit is contained in:
Jouni Malinen 2011-07-15 21:49:50 +03:00
parent 97c5b3c45b
commit e1d526293b
1 changed files with 30 additions and 0 deletions
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30
src/p2p/p2p.c
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@ -1644,6 +1644,31 @@ struct wpabuf * p2p_build_probe_resp_ies(struct p2p_data *p2p)
}
static int is_11b(u8 rate)
{
return rate == 0x02 || rate == 0x04 || rate == 0x0b || rate == 0x16;
}
static int supp_rates_11b_only(struct ieee802_11_elems *elems)
{
int num_11b = 0, num_others = 0;
int i;
if (elems->supp_rates == NULL && elems->ext_supp_rates == NULL)
return 0;
for (i = 0; elems->supp_rates && i < elems->supp_rates_len; i++) {
if (is_11b(elems->supp_rates[i]))
num_11b++;
else
num_others++;
}
return num_11b > 0 && num_others == 0;
}
static void p2p_reply_probe(struct p2p_data *p2p, const u8 *addr,
const u8 *dst, const u8 *bssid, const u8 *ie,
size_t ie_len)
@ -1689,6 +1714,11 @@ static void p2p_reply_probe(struct p2p_data *p2p, const u8 *addr,
return;
}
if (supp_rates_11b_only(&elems)) {
/* Indicates support for 11b rates only */
return;
}
os_memset(&msg, 0, sizeof(msg));
if (p2p_parse_ies(ie, ie_len, &msg) < 0) {
/* Could not parse P2P attributes */