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Add secondary channel IE for CSA

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If secondary channel is provided for CSA, advertise it in the Secondary
Channel Offset element in Beacon and Probe Response frames.

Signed-hostap: Andrei Otcheretianski <andrei.otcheretianski@intel.com>
This commit is contained in:
Andrei Otcheretianski 2013-12-15 10:47:42 +02:00 committed by Jouni Malinen
parent 8f4713c5c9
commit 76aab0305c
1 changed files with 49 additions and 14 deletions
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63
src/ap/beacon.c
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@ -223,13 +223,56 @@ static u8 * hostapd_eid_csa(struct hostapd_data *hapd, u8 *eid)
}
static u8 * hostapd_eid_secondary_channel(struct hostapd_data *hapd, u8 *eid)
{
u8 sec_ch;
if (!hapd->iface->cs_freq_params.sec_channel_offset)
return eid;
if (hapd->iface->cs_freq_params.sec_channel_offset == -1)
sec_ch = HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW;
else if (hapd->iface->cs_freq_params.sec_channel_offset == 1)
sec_ch = HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE;
else
return eid;
*eid++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;
*eid++ = 1;
*eid++ = sec_ch;
return eid;
}
static u8 * hostapd_add_csa_elems(struct hostapd_data *hapd, u8 *pos,
u8 *start, unsigned int *csa_counter_off)
{
u8 *old_pos = pos;
if (!csa_counter_off)
return pos;
*csa_counter_off = 0;
pos = hostapd_eid_csa(hapd, pos);
if (pos != old_pos) {
/* save an offset to the counter - should be last byte */
*csa_counter_off = pos - start - 1;
pos = hostapd_eid_secondary_channel(hapd, pos);
}
return pos;
}
static u8 * hostapd_gen_probe_resp(struct hostapd_data *hapd,
struct sta_info *sta,
const struct ieee80211_mgmt *req,
int is_p2p, size_t *resp_len)
{
struct ieee80211_mgmt *resp;
u8 *pos, *epos, *old_pos;
u8 *pos, *epos;
size_t buflen;
#define MAX_PROBERESP_LEN 768
@ -303,13 +346,8 @@ static u8 * hostapd_gen_probe_resp(struct hostapd_data *hapd,
pos = hostapd_eid_adv_proto(hapd, pos);
pos = hostapd_eid_roaming_consortium(hapd, pos);
old_pos = pos;
pos = hostapd_eid_csa(hapd, pos);
/* save an offset to the counter - should be last byte */
hapd->iface->cs_c_off_proberesp = (pos != old_pos) ?
pos - (u8 *) resp - 1 : 0;
pos = hostapd_add_csa_elems(hapd, pos, (u8 *)resp,
&hapd->iface->cs_c_off_proberesp);
#ifdef CONFIG_IEEE80211AC
pos = hostapd_eid_vht_capabilities(hapd, pos);
pos = hostapd_eid_vht_operation(hapd, pos);
@ -625,7 +663,7 @@ int ieee802_11_build_ap_params(struct hostapd_data *hapd,
size_t resp_len = 0;
#ifdef NEED_AP_MLME
u16 capab_info;
u8 *pos, *tailpos, *old_pos;
u8 *pos, *tailpos;
#define BEACON_HEAD_BUF_SIZE 256
#define BEACON_TAIL_BUF_SIZE 512
@ -720,11 +758,8 @@ int ieee802_11_build_ap_params(struct hostapd_data *hapd,
tailpos = hostapd_eid_interworking(hapd, tailpos);
tailpos = hostapd_eid_adv_proto(hapd, tailpos);
tailpos = hostapd_eid_roaming_consortium(hapd, tailpos);
old_pos = tailpos;
tailpos = hostapd_eid_csa(hapd, tailpos);
hapd->iface->cs_c_off_beacon = (old_pos != tailpos) ?
tailpos - tail - 1 : 0;
tailpos = hostapd_add_csa_elems(hapd, tailpos, tail,
&hapd->iface->cs_c_off_beacon);
#ifdef CONFIG_IEEE80211AC
tailpos = hostapd_eid_vht_capabilities(hapd, tailpos);
tailpos = hostapd_eid_vht_operation(hapd, tailpos);