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wl12xx: AP mode - support hidden SSID

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If a hidden SSID is requested, generate a probe response template
containing the real SSID.

Depends on the patch "mac80211: add ssid config to bss information
in AP-mode".

Signed-off-by: Arik Nemtsov <arik@wizery.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>
This commit is contained in:
Arik Nemtsov 2011-09-03 20:22:03 +03:00 committed by Luciano Coelho
parent df4c849f46
commit 68eaaf6ee5
2 changed files with 82 additions and 17 deletions
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20
drivers/net/wireless/wl12xx/cmd.c
View file

@ -661,12 +661,9 @@ int wl12xx_cmd_role_start_ap(struct wl1271 *wl)
wl1271_debug(DEBUG_CMD, "cmd role start ap %d", wl->role_id);
/*
* We currently do not support hidden SSID. The real SSID
* should be fetched from mac80211 first.
*/
if (wl->ssid_len == 0) {
wl1271_warning("Hidden SSID currently not supported for AP");
/* trying to use hidden SSID with an old hostapd version */
if (wl->ssid_len == 0 && !bss_conf->hidden_ssid) {
wl1271_error("got a null SSID from beacon/bss");
ret = -EINVAL;
goto out;
}
@ -695,9 +692,18 @@ int wl12xx_cmd_role_start_ap(struct wl1271 *wl)
cmd->ap.dtim_interval = bss_conf->dtim_period;
cmd->ap.beacon_expiry = WL1271_AP_DEF_BEACON_EXP;
cmd->channel = wl->channel;
cmd->ap.ssid_len = wl->ssid_len;
if (!bss_conf->hidden_ssid) {
/* take the SSID from the beacon for backward compatibility */
cmd->ap.ssid_type = WL12XX_SSID_TYPE_PUBLIC;
cmd->ap.ssid_len = wl->ssid_len;
memcpy(cmd->ap.ssid, wl->ssid, wl->ssid_len);
} else {
cmd->ap.ssid_type = WL12XX_SSID_TYPE_HIDDEN;
cmd->ap.ssid_len = bss_conf->ssid_len;
memcpy(cmd->ap.ssid, bss_conf->ssid, bss_conf->ssid_len);
}
cmd->ap.local_rates = cpu_to_le32(0xffffffff);
switch (wl->band) {

67
drivers/net/wireless/wl12xx/main.c
View file

@ -3102,6 +3102,62 @@ static void wl12xx_remove_vendor_ie(struct sk_buff *skb,
skb_trim(skb, skb->len - len);
}
static int wl1271_ap_set_probe_resp_tmpl(struct wl1271 *wl,
u8 *probe_rsp_data,
size_t probe_rsp_len,
u32 rates)
{
struct ieee80211_bss_conf *bss_conf = &wl->vif->bss_conf;
u8 probe_rsp_templ[WL1271_CMD_TEMPL_MAX_SIZE];
int ssid_ie_offset, ie_offset, templ_len;
const u8 *ptr;
/* no need to change probe response if the SSID is set correctly */
if (wl->ssid_len > 0)
return wl1271_cmd_template_set(wl,
CMD_TEMPL_AP_PROBE_RESPONSE,
probe_rsp_data,
probe_rsp_len, 0,
rates);
if (probe_rsp_len + bss_conf->ssid_len > WL1271_CMD_TEMPL_MAX_SIZE) {
wl1271_error("probe_rsp template too big");
return -EINVAL;
}
/* start searching from IE offset */
ie_offset = offsetof(struct ieee80211_mgmt, u.probe_resp.variable);
ptr = cfg80211_find_ie(WLAN_EID_SSID, probe_rsp_data + ie_offset,
probe_rsp_len - ie_offset);
if (!ptr) {
wl1271_error("No SSID in beacon!");
return -EINVAL;
}
ssid_ie_offset = ptr - probe_rsp_data;
ptr += (ptr[1] + 2);
memcpy(probe_rsp_templ, probe_rsp_data, ssid_ie_offset);
/* insert SSID from bss_conf */
probe_rsp_templ[ssid_ie_offset] = WLAN_EID_SSID;
probe_rsp_templ[ssid_ie_offset + 1] = bss_conf->ssid_len;
memcpy(probe_rsp_templ + ssid_ie_offset + 2,
bss_conf->ssid, bss_conf->ssid_len);
templ_len = ssid_ie_offset + 2 + bss_conf->ssid_len;
memcpy(probe_rsp_templ + ssid_ie_offset + 2 + bss_conf->ssid_len,
ptr, probe_rsp_len - (ptr - probe_rsp_data));
templ_len += probe_rsp_len - (ptr - probe_rsp_data);
return wl1271_cmd_template_set(wl,
CMD_TEMPL_AP_PROBE_RESPONSE,
probe_rsp_templ,
templ_len, 0,
rates);
}
static int wl1271_bss_erp_info_changed(struct wl1271 *wl,
struct ieee80211_bss_conf *bss_conf,
u32 changed)
@ -3201,11 +3257,14 @@ static int wl1271_bss_beacon_info_changed(struct wl1271 *wl,
hdr = (struct ieee80211_hdr *) beacon->data;
hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
IEEE80211_STYPE_PROBE_RESP);
tmpl_id = is_ap ? CMD_TEMPL_AP_PROBE_RESPONSE :
CMD_TEMPL_PROBE_RESPONSE;
if (is_ap)
ret = wl1271_ap_set_probe_resp_tmpl(wl,
beacon->data,
beacon->len,
wl1271_tx_min_rate_get(wl));
else
ret = wl1271_cmd_template_set(wl,
tmpl_id,
CMD_TEMPL_PROBE_RESPONSE,
beacon->data,
beacon->len, 0,
wl1271_tx_min_rate_get(wl));