diff options
Diffstat (limited to 'drivers/net/wireless/mwifiex/ie.c')
| -rw-r--r-- | drivers/net/wireless/mwifiex/ie.c | 396 |
1 files changed, 396 insertions, 0 deletions
diff --git a/drivers/net/wireless/mwifiex/ie.c b/drivers/net/wireless/mwifiex/ie.c new file mode 100644 index 000000000000..ceb82cd749cc --- /dev/null +++ b/drivers/net/wireless/mwifiex/ie.c @@ -0,0 +1,396 @@ +/* + * 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(priv->mgmt_ie[i].ie_length) + + 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; + tmp += le16_to_cpu(priv->mgmt_ie[index].ie_length); + memcpy(tmp, &ie->ie_buffer, le16_to_cpu(ie->ie_length)); + le16_add_cpu(&priv->mgmt_ie[index].ie_length, + le16_to_cpu(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); + ie->ie_length = priv->mgmt_ie[index].ie_length; + memcpy(&ie->ie_buffer, &priv->mgmt_ie[index].ie_buffer, + le16_to_cpu(priv->mgmt_ie[index].ie_length)); + } 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(struct mwifiex_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); + + 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_ap_settings *params) +{ + struct mwifiex_ie *beacon_ie = NULL, *pr_ie = NULL; + struct mwifiex_ie *ar_ie = NULL, *rsn_ie = NULL; + struct ieee_types_header *ie = NULL; + u16 beacon_idx = MWIFIEX_AUTO_IDX_MASK, pr_idx = MWIFIEX_AUTO_IDX_MASK; + u16 ar_idx = MWIFIEX_AUTO_IDX_MASK, rsn_idx = MWIFIEX_AUTO_IDX_MASK; + u16 mask; + int ret = 0; + + if (params->beacon.tail && params->beacon.tail_len) { + ie = (void *)cfg80211_find_ie(WLAN_EID_RSN, params->beacon.tail, + params->beacon.tail_len); + if (ie) { + rsn_ie = kmalloc(sizeof(struct mwifiex_ie), GFP_KERNEL); + if (!rsn_ie) + return -ENOMEM; + + rsn_ie->ie_index = cpu_to_le16(rsn_idx); + mask = MGMT_MASK_BEACON | MGMT_MASK_PROBE_RESP | + MGMT_MASK_ASSOC_RESP; + rsn_ie->mgmt_subtype_mask = cpu_to_le16(mask); + rsn_ie->ie_length = cpu_to_le16(ie->len + 2); + memcpy(rsn_ie->ie_buffer, ie, ie->len + 2); + + if (mwifiex_update_uap_custom_ie(priv, rsn_ie, &rsn_idx, + NULL, NULL, + NULL, NULL)) { + ret = -1; + goto done; + } + + priv->rsn_idx = rsn_idx; + } + } + + if (params->beacon.beacon_ies && params->beacon.beacon_ies_len) { + beacon_ie = kmalloc(sizeof(struct mwifiex_ie), GFP_KERNEL); + if (!beacon_ie) { + ret = -ENOMEM; + goto done; + } + + beacon_ie->ie_index = cpu_to_le16(beacon_idx); + beacon_ie->mgmt_subtype_mask = cpu_to_le16(MGMT_MASK_BEACON); + beacon_ie->ie_length = + cpu_to_le16(params->beacon.beacon_ies_len); + memcpy(beacon_ie->ie_buffer, params->beacon.beacon_ies, + params->beacon.beacon_ies_len); + } + + if (params->beacon.proberesp_ies && params->beacon.proberesp_ies_len) { + pr_ie = kmalloc(sizeof(struct mwifiex_ie), GFP_KERNEL); + if (!pr_ie) { + ret = -ENOMEM; + goto done; + } + + pr_ie->ie_index = cpu_to_le16(pr_idx); + pr_ie->mgmt_subtype_mask = cpu_to_le16(MGMT_MASK_PROBE_RESP); + pr_ie->ie_length = + cpu_to_le16(params->beacon.proberesp_ies_len); + memcpy(pr_ie->ie_buffer, params->beacon.proberesp_ies, + params->beacon.proberesp_ies_len); + } + + if (params->beacon.assocresp_ies && params->beacon.assocresp_ies_len) { + ar_ie = kmalloc(sizeof(struct mwifiex_ie), GFP_KERNEL); + if (!ar_ie) { + ret = -ENOMEM; + goto done; + } + + ar_ie->ie_index = cpu_to_le16(ar_idx); + mask = MGMT_MASK_ASSOC_RESP | MGMT_MASK_REASSOC_RESP; + ar_ie->mgmt_subtype_mask = cpu_to_le16(mask); + ar_ie->ie_length = + cpu_to_le16(params->beacon.assocresp_ies_len); + memcpy(ar_ie->ie_buffer, params->beacon.assocresp_ies, + params->beacon.assocresp_ies_len); + } + + 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); + kfree(rsn_ie); + + return ret; +} + +/* 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; +} |