- 根目录:
- drivers
- net
- wireless
- mwifiex
- ie.c
/*
* Marvell Wireless LAN device driver: management IE handling- setting and
* deleting IE.
*
* Copyright (C) 2012, Marvell International Ltd.
*
* This software file (the "File") is distributed by Marvell International
* Ltd. under the terms of the GNU General Public License Version 2, June 1991
* (the "License"). You may use, redistribute and/or modify this File in
* accordance with the terms and conditions of the License, a copy of which
* is available by writing to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
* worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
*
* THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
* IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
* ARE EXPRESSLY DISCLAIMED. The License provides additional details about
* this warranty disclaimer.
*/
#include "main.h"
/* This function checks if current IE index is used by any on other interface.
* Return: -1: yes, current IE index is used by someone else.
* 0: no, current IE index is NOT used by other interface.
*/
static int
mwifiex_ie_index_used_by_other_intf(struct mwifiex_private *priv, u16 idx)
{
int i;
struct mwifiex_adapter *adapter = priv->adapter;
struct mwifiex_ie *ie;
for (i = 0; i < adapter->priv_num; i++) {
if (adapter->priv[i] != priv) {
ie = &adapter->priv[i]->mgmt_ie[idx];
if (ie->mgmt_subtype_mask && ie->ie_length)
return -1;
}
}
return 0;
}
/* Get unused IE index. This index will be used for setting new IE */
static int
mwifiex_ie_get_autoidx(struct mwifiex_private *priv, u16 subtype_mask,
struct mwifiex_ie *ie, u16 *index)
{
u16 mask, len, i;
for (i = 0; i < priv->adapter->max_mgmt_ie_index; i++) {
mask = le16_to_cpu(priv->mgmt_ie[i].mgmt_subtype_mask);
len = le16_to_cpu(ie->ie_length);
if (mask == MWIFIEX_AUTO_IDX_MASK)
continue;
if (mask == subtype_mask) {
if (len > IEEE_MAX_IE_SIZE)
continue;
*index = i;
return 0;
}
if (!priv->mgmt_ie[i].ie_length) {
if (mwifiex_ie_index_used_by_other_intf(priv, i))
continue;
*index = i;
return 0;
}
}
return -1;
}
/* This function prepares IE data buffer for command to be sent to FW */
static int
mwifiex_update_autoindex_ies(struct mwifiex_private *priv,
struct mwifiex_ie_list *ie_list)
{
u16 travel_len, index, mask;
s16 input_len;
struct mwifiex_ie *ie;
u8 *tmp;
input_len = le16_to_cpu(ie_list->len);
travel_len = sizeof(struct host_cmd_tlv);
ie_list->len = 0;
while (input_len > 0) {
ie = (struct mwifiex_ie *)(((u8 *)ie_list) + travel_len);
input_len -= le16_to_cpu(ie->ie_length) + MWIFIEX_IE_HDR_SIZE;
travel_len += le16_to_cpu(ie->ie_length) + MWIFIEX_IE_HDR_SIZE;
index = le16_to_cpu(ie->ie_index);
mask = le16_to_cpu(ie->mgmt_subtype_mask);
if (index == MWIFIEX_AUTO_IDX_MASK) {
/* automatic addition */
if (mwifiex_ie_get_autoidx(priv, mask, ie, &index))
return -1;
if (index == MWIFIEX_AUTO_IDX_MASK)
return -1;
tmp = (u8 *)&priv->mgmt_ie[index].ie_buffer;
memcpy(tmp, &ie->ie_buffer, le16_to_cpu(ie->ie_length));
priv->mgmt_ie[index].ie_length = ie->ie_length;
priv->mgmt_ie[index].ie_index = cpu_to_le16(index);
priv->mgmt_ie[index].mgmt_subtype_mask =
cpu_to_le16(mask);
ie->ie_index = cpu_to_le16(index);
} else {
if (mask != MWIFIEX_DELETE_MASK)
return -1;
/*
* Check if this index is being used on any
* other interface.
*/
if (mwifiex_ie_index_used_by_other_intf(priv, index))
return -1;
ie->ie_length = 0;
memcpy(&priv->mgmt_ie[index], ie,
sizeof(struct mwifiex_ie));
}
le16_add_cpu(&ie_list->len,
le16_to_cpu(priv->mgmt_ie[index].ie_length) +
MWIFIEX_IE_HDR_SIZE);
}
if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_UAP)
return mwifiex_send_cmd_async(priv, HostCmd_CMD_UAP_SYS_CONFIG,
HostCmd_ACT_GEN_SET,
UAP_CUSTOM_IE_I, ie_list);
return 0;
}
/* Copy individual custom IEs for beacon, probe response and assoc response
* and prepare single structure for IE setting.
* This function also updates allocated IE indices from driver.
*/
static int
mwifiex_update_uap_custom_ie(struct mwifiex_private *priv,
struct mwifiex_ie *beacon_ie, u16 *beacon_idx,
struct mwifiex_ie *pr_ie, u16 *probe_idx,
struct mwifiex_ie *ar_ie, u16 *assoc_idx)
{
struct mwifiex_ie_list *ap_custom_ie;
u8 *pos;
u16 len;
int ret;
ap_custom_ie = kzalloc(sizeof(*ap_custom_ie), GFP_KERNEL);
if (!ap_custom_ie)
return -ENOMEM;
ap_custom_ie->type = cpu_to_le16(TLV_TYPE_MGMT_IE);
pos = (u8 *)ap_custom_ie->ie_list;
if (beacon_ie) {
len = sizeof(struct mwifiex_ie) - IEEE_MAX_IE_SIZE +
le16_to_cpu(beacon_ie->ie_length);
memcpy(pos, beacon_ie, len);
pos += len;
le16_add_cpu(&ap_custom_ie->len, len);
}
if (pr_ie) {
len = sizeof(struct mwifiex_ie) - IEEE_MAX_IE_SIZE +
le16_to_cpu(pr_ie->ie_length);
memcpy(pos, pr_ie, len);
pos += len;
le16_add_cpu(&ap_custom_ie->len, len);
}
if (ar_ie) {
len = sizeof(struct mwifiex_ie) - IEEE_MAX_IE_SIZE +
le16_to_cpu(ar_ie->ie_length);
memcpy(pos, ar_ie, len);
pos += len;
le16_add_cpu(&ap_custom_ie->len, len);
}
ret = mwifiex_update_autoindex_ies(priv, ap_custom_ie);
pos = (u8 *)(&ap_custom_ie->ie_list[0].ie_index);
if (beacon_ie && *beacon_idx == MWIFIEX_AUTO_IDX_MASK) {
/* save beacon ie index after auto-indexing */
*beacon_idx = le16_to_cpu(ap_custom_ie->ie_list[0].ie_index);
len = sizeof(*beacon_ie) - IEEE_MAX_IE_SIZE +
le16_to_cpu(beacon_ie->ie_length);
pos += len;
}
if (pr_ie && le16_to_cpu(pr_ie->ie_index) == MWIFIEX_AUTO_IDX_MASK) {
/* save probe resp ie index after auto-indexing */
*probe_idx = *((u16 *)pos);
len = sizeof(*pr_ie) - IEEE_MAX_IE_SIZE +
le16_to_cpu(pr_ie->ie_length);
pos += len;
}
if (ar_ie && le16_to_cpu(ar_ie->ie_index) == MWIFIEX_AUTO_IDX_MASK)
/* save assoc resp ie index after auto-indexing */
*assoc_idx = *((u16 *)pos);
kfree(ap_custom_ie);
return ret;
}
/* This function checks if the vendor specified IE is present in passed buffer
* and copies it to mwifiex_ie structure.
* Function takes pointer to struct mwifiex_ie pointer as argument.
* If the vendor specified IE is present then memory is allocated for
* mwifiex_ie pointer and filled in with IE. Caller should take care of freeing
* this memory.
*/
static int mwifiex_update_vs_ie(const u8 *ies, int ies_len,
struct mwifiex_ie **ie_ptr, u16 mask,
unsigned int oui, u8 oui_type)
{
struct ieee_types_header *vs_ie;
struct mwifiex_ie *ie = *ie_ptr;
const u8 *vendor_ie;
vendor_ie = cfg80211_find_vendor_ie(oui, oui_type, ies, ies_len);
if (vendor_ie) {
if (!*ie_ptr) {
*ie_ptr = kzalloc(sizeof(struct mwifiex_ie),
GFP_KERNEL);
if (!*ie_ptr)
return -ENOMEM;
ie = *ie_ptr;
}
vs_ie = (struct ieee_types_header *)vendor_ie;
memcpy(ie->ie_buffer + le16_to_cpu(ie->ie_length),
vs_ie, vs_ie->len + 2);
le16_add_cpu(&ie->ie_length, vs_ie->len + 2);
ie->mgmt_subtype_mask = cpu_to_le16(mask);
ie->ie_index = cpu_to_le16(MWIFIEX_AUTO_IDX_MASK);
}
*ie_ptr = ie;
return 0;
}
/* This function parses beacon IEs, probe response IEs, association response IEs
* from cfg80211_ap_settings->beacon and sets these IE to FW.
*/
static int mwifiex_set_mgmt_beacon_data_ies(struct mwifiex_private *priv,
struct cfg80211_beacon_data *data)
{
struct mwifiex_ie *beacon_ie = NULL, *pr_ie = NULL, *ar_ie = NULL;
u16 beacon_idx = MWIFIEX_AUTO_IDX_MASK, pr_idx = MWIFIEX_AUTO_IDX_MASK;
u16 ar_idx = MWIFIEX_AUTO_IDX_MASK;
int ret = 0;
if (data->beacon_ies && data->beacon_ies_len) {
mwifiex_update_vs_ie(data->beacon_ies, data->beacon_ies_len,
&beacon_ie, MGMT_MASK_BEACON,
WLAN_OUI_MICROSOFT,
WLAN_OUI_TYPE_MICROSOFT_WPS);
mwifiex_update_vs_ie(data->beacon_ies, data->beacon_ies_len,
&beacon_ie, MGMT_MASK_BEACON,
WLAN_OUI_WFA, WLAN_OUI_TYPE_WFA_P2P);
}
if (data->proberesp_ies && data->proberesp_ies_len) {
mwifiex_update_vs_ie(data->proberesp_ies,
data->proberesp_ies_len, &pr_ie,
MGMT_MASK_PROBE_RESP, WLAN_OUI_MICROSOFT,
WLAN_OUI_TYPE_MICROSOFT_WPS);
mwifiex_update_vs_ie(data->proberesp_ies,
data->proberesp_ies_len, &pr_ie,
MGMT_MASK_PROBE_RESP,
WLAN_OUI_WFA, WLAN_OUI_TYPE_WFA_P2P);
}
if (data->assocresp_ies && data->assocresp_ies_len) {
mwifiex_update_vs_ie(data->assocresp_ies,
data->assocresp_ies_len, &ar_ie,
MGMT_MASK_ASSOC_RESP |
MGMT_MASK_REASSOC_RESP,
WLAN_OUI_MICROSOFT,
WLAN_OUI_TYPE_MICROSOFT_WPS);
mwifiex_update_vs_ie(data->assocresp_ies,
data->assocresp_ies_len, &ar_ie,
MGMT_MASK_ASSOC_RESP |
MGMT_MASK_REASSOC_RESP, WLAN_OUI_WFA,
WLAN_OUI_TYPE_WFA_P2P);
}
if (beacon_ie || pr_ie || ar_ie) {
ret = mwifiex_update_uap_custom_ie(priv, beacon_ie,
&beacon_idx, pr_ie,
&pr_idx, ar_ie, &ar_idx);
if (ret)
goto done;
}
priv->beacon_idx = beacon_idx;
priv->proberesp_idx = pr_idx;
priv->assocresp_idx = ar_idx;
done:
kfree(beacon_ie);
kfree(pr_ie);
kfree(ar_ie);
return ret;
}
/* This function parses different IEs-tail IEs, beacon IEs, probe response IEs,
* association response IEs from cfg80211_ap_settings function and sets these IE
* to FW.
*/
int mwifiex_set_mgmt_ies(struct mwifiex_private *priv,
struct cfg80211_beacon_data *info)
{
struct mwifiex_ie *gen_ie;
struct ieee_types_header *rsn_ie, *wpa_ie = NULL;
u16 rsn_idx = MWIFIEX_AUTO_IDX_MASK, ie_len = 0;
const u8 *vendor_ie;
if (info->tail && info->tail_len) {
gen_ie = kzalloc(sizeof(struct mwifiex_ie), GFP_KERNEL);
if (!gen_ie)
return -ENOMEM;
gen_ie->ie_index = cpu_to_le16(rsn_idx);
gen_ie->mgmt_subtype_mask = cpu_to_le16(MGMT_MASK_BEACON |
MGMT_MASK_PROBE_RESP |
MGMT_MASK_ASSOC_RESP);
rsn_ie = (void *)cfg80211_find_ie(WLAN_EID_RSN,
info->tail, info->tail_len);
if (rsn_ie) {
memcpy(gen_ie->ie_buffer, rsn_ie, rsn_ie->len + 2);
ie_len = rsn_ie->len + 2;
gen_ie->ie_length = cpu_to_le16(ie_len);
}
vendor_ie = cfg80211_find_vendor_ie(WLAN_OUI_MICROSOFT,
WLAN_OUI_TYPE_MICROSOFT_WPA,
info->tail,
info->tail_len);
if (vendor_ie) {
wpa_ie = (struct ieee_types_header *)vendor_ie;
memcpy(gen_ie->ie_buffer + ie_len,
wpa_ie, wpa_ie->len + 2);
ie_len += wpa_ie->len + 2;
gen_ie->ie_length = cpu_to_le16(ie_len);
}
if (rsn_ie || wpa_ie) {
if (mwifiex_update_uap_custom_ie(priv, gen_ie, &rsn_idx,
NULL, NULL,
NULL, NULL)) {
kfree(gen_ie);
return -1;
}
priv->rsn_idx = rsn_idx;
}
kfree(gen_ie);
}
return mwifiex_set_mgmt_beacon_data_ies(priv, info);
}
/* This function removes management IE set */
int mwifiex_del_mgmt_ies(struct mwifiex_private *priv)
{
struct mwifiex_ie *beacon_ie = NULL, *pr_ie = NULL;
struct mwifiex_ie *ar_ie = NULL, *rsn_ie = NULL;
int ret = 0;
if (priv->rsn_idx != MWIFIEX_AUTO_IDX_MASK) {
rsn_ie = kmalloc(sizeof(struct mwifiex_ie), GFP_KERNEL);
if (!rsn_ie)
return -ENOMEM;
rsn_ie->ie_index = cpu_to_le16(priv->rsn_idx);
rsn_ie->mgmt_subtype_mask = cpu_to_le16(MWIFIEX_DELETE_MASK);
rsn_ie->ie_length = 0;
if (mwifiex_update_uap_custom_ie(priv, rsn_ie, &priv->rsn_idx,
NULL, &priv->proberesp_idx,
NULL, &priv->assocresp_idx)) {
ret = -1;
goto done;
}
priv->rsn_idx = MWIFIEX_AUTO_IDX_MASK;
}
if (priv->beacon_idx != MWIFIEX_AUTO_IDX_MASK) {
beacon_ie = kmalloc(sizeof(struct mwifiex_ie), GFP_KERNEL);
if (!beacon_ie) {
ret = -ENOMEM;
goto done;
}
beacon_ie->ie_index = cpu_to_le16(priv->beacon_idx);
beacon_ie->mgmt_subtype_mask = cpu_to_le16(MWIFIEX_DELETE_MASK);
beacon_ie->ie_length = 0;
}
if (priv->proberesp_idx != MWIFIEX_AUTO_IDX_MASK) {
pr_ie = kmalloc(sizeof(struct mwifiex_ie), GFP_KERNEL);
if (!pr_ie) {
ret = -ENOMEM;
goto done;
}
pr_ie->ie_index = cpu_to_le16(priv->proberesp_idx);
pr_ie->mgmt_subtype_mask = cpu_to_le16(MWIFIEX_DELETE_MASK);
pr_ie->ie_length = 0;
}
if (priv->assocresp_idx != MWIFIEX_AUTO_IDX_MASK) {
ar_ie = kmalloc(sizeof(struct mwifiex_ie), GFP_KERNEL);
if (!ar_ie) {
ret = -ENOMEM;
goto done;
}
ar_ie->ie_index = cpu_to_le16(priv->assocresp_idx);
ar_ie->mgmt_subtype_mask = cpu_to_le16(MWIFIEX_DELETE_MASK);
ar_ie->ie_length = 0;
}
if (beacon_ie || pr_ie || ar_ie)
ret = mwifiex_update_uap_custom_ie(priv,
beacon_ie, &priv->beacon_idx,
pr_ie, &priv->proberesp_idx,
ar_ie, &priv->assocresp_idx);
done:
kfree(beacon_ie);
kfree(pr_ie);
kfree(ar_ie);
kfree(rsn_ie);
return ret;
}