openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity
linux/drivers/net/wireless/libertas/assoc.c

1866 lines
51 KiB
C
Raw Blame History

/* Copyright (C) 2006, Red Hat, Inc. */
#include <linux/types.h>
#include <linux/etherdevice.h>
#include <linux/ieee80211.h>
#include <linux/if_arp.h>
#include <net/lib80211.h>
#include "assoc.h"
#include "decl.h"
#include "host.h"
#include "scan.h"
#include "cmd.h"
static const u8 bssid_any[ETH_ALEN] __attribute__ ((aligned (2))) =
{ 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
static const u8 bssid_off[ETH_ALEN] __attribute__ ((aligned (2))) =
{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
/* The firmware needs the following bits masked out of the beacon-derived
* capability field when associating/joining to a BSS:
* 9 (QoS), 11 (APSD), 12 (unused), 14 (unused), 15 (unused)
*/
#define CAPINFO_MASK (~(0xda00))
/**
* @brief This function finds common rates between rates and card rates.
*
* It will fill common rates in rates as output if found.
*
* NOTE: Setting the MSB of the basic rates need to be taken
* care, either before or after calling this function
*
* @param priv A pointer to struct lbs_private structure
* @param rates the buffer which keeps input and output
* @param rates_size the size of rates buffer; new size of buffer on return,
* which will be less than or equal to original rates_size
*
* @return 0 on success, or -1 on error
*/
static int get_common_rates(struct lbs_private *priv,
u8 *rates,
u16 *rates_size)
{
int i, j;
u8 intersection[MAX_RATES];
u16 intersection_size;
u16 num_rates = 0;
intersection_size = min_t(u16, *rates_size, ARRAY_SIZE(intersection));
/* Allow each rate from 'rates' that is supported by the hardware */
for (i = 0; i < ARRAY_SIZE(lbs_bg_rates) && lbs_bg_rates[i]; i++) {
for (j = 0; j < intersection_size && rates[j]; j++) {
if (rates[j] == lbs_bg_rates[i])
intersection[num_rates++] = rates[j];
}
}
lbs_deb_hex(LBS_DEB_JOIN, "AP rates ", rates, *rates_size);
lbs_deb_hex(LBS_DEB_JOIN, "card rates ", lbs_bg_rates,
ARRAY_SIZE(lbs_bg_rates));
lbs_deb_hex(LBS_DEB_JOIN, "common rates", intersection, num_rates);
lbs_deb_join("TX data rate 0x%02x\n", priv->cur_rate);
if (!priv->enablehwauto) {
for (i = 0; i < num_rates; i++) {
if (intersection[i] == priv->cur_rate)
goto done;
}
lbs_pr_alert("Previously set fixed data rate %#x isn't "
"compatible with the network.\n", priv->cur_rate);
return -1;
}
done:
memset(rates, 0, *rates_size);
*rates_size = num_rates;
memcpy(rates, intersection, num_rates);
return 0;
}
/**
* @brief Sets the MSB on basic rates as the firmware requires
*
* Scan through an array and set the MSB for basic data rates.
*
* @param rates buffer of data rates
* @param len size of buffer
*/
static void lbs_set_basic_rate_flags(u8 *rates, size_t len)
{
int i;
for (i = 0; i < len; i++) {
if (rates[i] == 0x02 || rates[i] == 0x04 ||
rates[i] == 0x0b || rates[i] == 0x16)
rates[i] |= 0x80;
}
}
static u8 iw_auth_to_ieee_auth(u8 auth)
{
if (auth == IW_AUTH_ALG_OPEN_SYSTEM)
return 0x00;
else if (auth == IW_AUTH_ALG_SHARED_KEY)
return 0x01;
else if (auth == IW_AUTH_ALG_LEAP)
return 0x80;
lbs_deb_join("%s: invalid auth alg 0x%X\n", __func__, auth);
return 0;
}
/**
* @brief This function prepares the authenticate command. AUTHENTICATE only
* sets the authentication suite for future associations, as the firmware
* handles authentication internally during the ASSOCIATE command.
*
* @param priv A pointer to struct lbs_private structure
* @param bssid The peer BSSID with which to authenticate
* @param auth The authentication mode to use (from wireless.h)
*
* @return 0 or -1
*/
static int lbs_set_authentication(struct lbs_private *priv, u8 bssid[6], u8 auth)
{
struct cmd_ds_802_11_authenticate cmd;
int ret = -1;
lbs_deb_enter(LBS_DEB_JOIN);
cmd.hdr.size = cpu_to_le16(sizeof(cmd));
memcpy(cmd.bssid, bssid, ETH_ALEN);
cmd.authtype = iw_auth_to_ieee_auth(auth);
lbs_deb_join("AUTH_CMD: BSSID %pM, auth 0x%x\n", bssid, cmd.authtype);
ret = lbs_cmd_with_response(priv, CMD_802_11_AUTHENTICATE, &cmd);
lbs_deb_leave_args(LBS_DEB_JOIN, "ret %d", ret);
return ret;
}
static int lbs_assoc_post(struct lbs_private *priv,
struct cmd_ds_802_11_associate_response *resp)
{
int ret = 0;
union iwreq_data wrqu;
struct bss_descriptor *bss;
u16 status_code;
lbs_deb_enter(LBS_DEB_ASSOC);
if (!priv->in_progress_assoc_req) {
lbs_deb_assoc("ASSOC_RESP: no in-progress assoc request\n");
ret = -1;
goto done;
}
bss = &priv->in_progress_assoc_req->bss;
/*
* Older FW versions map the IEEE 802.11 Status Code in the association
* response to the following values returned in resp->statuscode:
*
* IEEE Status Code Marvell Status Code
* 0 -> 0x0000 ASSOC_RESULT_SUCCESS
* 13 -> 0x0004 ASSOC_RESULT_AUTH_REFUSED
* 14 -> 0x0004 ASSOC_RESULT_AUTH_REFUSED
* 15 -> 0x0004 ASSOC_RESULT_AUTH_REFUSED
* 16 -> 0x0004 ASSOC_RESULT_AUTH_REFUSED
* others -> 0x0003 ASSOC_RESULT_REFUSED
*
* Other response codes:
* 0x0001 -> ASSOC_RESULT_INVALID_PARAMETERS (unused)
* 0x0002 -> ASSOC_RESULT_TIMEOUT (internal timer expired waiting for
* association response from the AP)
*/
status_code = le16_to_cpu(resp->statuscode);
if (priv->fwrelease < 0x09000000) {
switch (status_code) {
case 0x00:
break;
case 0x01:
lbs_deb_assoc("ASSOC_RESP: invalid parameters\n");
break;
case 0x02:
lbs_deb_assoc("ASSOC_RESP: internal timer "
"expired while waiting for the AP\n");
break;
case 0x03:
lbs_deb_assoc("ASSOC_RESP: association "
"refused by AP\n");
break;
case 0x04:
lbs_deb_assoc("ASSOC_RESP: authentication "
"refused by AP\n");
break;
default:
lbs_deb_assoc("ASSOC_RESP: failure reason 0x%02x "
" unknown\n", status_code);
break;
}
} else {
/* v9+ returns the AP's association response */
lbs_deb_assoc("ASSOC_RESP: failure reason 0x%02x\n", status_code);
}
if (status_code) {
lbs_mac_event_disconnected(priv);
ret = -1;
goto done;
}
lbs_deb_hex(LBS_DEB_ASSOC, "ASSOC_RESP",
(void *) (resp + sizeof (resp->hdr)),
le16_to_cpu(resp->hdr.size) - sizeof (resp->hdr));
/* Send a Media Connected event, according to the Spec */
priv->connect_status = LBS_CONNECTED;
/* Update current SSID and BSSID */
memcpy(&priv->curbssparams.ssid, &bss->ssid, IW_ESSID_MAX_SIZE);
priv->curbssparams.ssid_len = bss->ssid_len;
memcpy(priv->curbssparams.bssid, bss->bssid, ETH_ALEN);
priv->SNR[TYPE_RXPD][TYPE_AVG] = 0;
priv->NF[TYPE_RXPD][TYPE_AVG] = 0;
memset(priv->rawSNR, 0x00, sizeof(priv->rawSNR));
memset(priv->rawNF, 0x00, sizeof(priv->rawNF));
priv->nextSNRNF = 0;
priv->numSNRNF = 0;
netif_carrier_on(priv->dev);
if (!priv->tx_pending_len)
netif_wake_queue(priv->dev);
memcpy(wrqu.ap_addr.sa_data, priv->curbssparams.bssid, ETH_ALEN);
wrqu.ap_addr.sa_family = ARPHRD_ETHER;
wireless_send_event(priv->dev, SIOCGIWAP, &wrqu, NULL);
done:
lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
return ret;
}
/**
* @brief This function prepares an association-class command.
*
* @param priv A pointer to struct lbs_private structure
* @param assoc_req The association request describing the BSS to associate
* or reassociate with
* @param command The actual command, either CMD_802_11_ASSOCIATE or
* CMD_802_11_REASSOCIATE
*
* @return 0 or -1
*/
static int lbs_associate(struct lbs_private *priv,
struct assoc_request *assoc_req,
u16 command)
{
struct cmd_ds_802_11_associate cmd;
int ret = 0;
struct bss_descriptor *bss = &assoc_req->bss;
u8 *pos = &(cmd.iebuf[0]);
u16 tmpcap, tmplen, tmpauth;
struct mrvl_ie_ssid_param_set *ssid;
struct mrvl_ie_ds_param_set *ds;
struct mrvl_ie_cf_param_set *cf;
struct mrvl_ie_rates_param_set *rates;
struct mrvl_ie_rsn_param_set *rsn;
struct mrvl_ie_auth_type *auth;
lbs_deb_enter(LBS_DEB_ASSOC);
BUG_ON((command != CMD_802_11_ASSOCIATE) &&
(command != CMD_802_11_REASSOCIATE));
memset(&cmd, 0, sizeof(cmd));
cmd.hdr.command = cpu_to_le16(command);
/* Fill in static fields */
memcpy(cmd.bssid, bss->bssid, ETH_ALEN);
cmd.listeninterval = cpu_to_le16(MRVDRV_DEFAULT_LISTEN_INTERVAL);
/* Capability info */
tmpcap = (bss->capability & CAPINFO_MASK);
if (bss->mode == IW_MODE_INFRA)
tmpcap |= WLAN_CAPABILITY_ESS;
cmd.capability = cpu_to_le16(tmpcap);
lbs_deb_assoc("ASSOC_CMD: capability 0x%04x\n", tmpcap);
/* SSID */
ssid = (struct mrvl_ie_ssid_param_set *) pos;
ssid->header.type = cpu_to_le16(TLV_TYPE_SSID);
tmplen = bss->ssid_len;
ssid->header.len = cpu_to_le16(tmplen);
memcpy(ssid->ssid, bss->ssid, tmplen);
pos += sizeof(ssid->header) + tmplen;
ds = (struct mrvl_ie_ds_param_set *) pos;
ds->header.type = cpu_to_le16(TLV_TYPE_PHY_DS);
ds->header.len = cpu_to_le16(1);
ds->channel = bss->phy.ds.channel;
pos += sizeof(ds->header) + 1;
cf = (struct mrvl_ie_cf_param_set *) pos;
cf->header.type = cpu_to_le16(TLV_TYPE_CF);
tmplen = sizeof(*cf) - sizeof (cf->header);
cf->header.len = cpu_to_le16(tmplen);
/* IE payload should be zeroed, firmware fills it in for us */
pos += sizeof(*cf);
rates = (struct mrvl_ie_rates_param_set *) pos;
rates->header.type = cpu_to_le16(TLV_TYPE_RATES);
tmplen = min_t(u16, ARRAY_SIZE(bss->rates), MAX_RATES);
memcpy(&rates->rates, &bss->rates, tmplen);
if (get_common_rates(priv, rates->rates, &tmplen)) {
ret = -1;
goto done;
}
pos += sizeof(rates->header) + tmplen;
rates->header.len = cpu_to_le16(tmplen);
lbs_deb_assoc("ASSOC_CMD: num rates %u\n", tmplen);
/* Copy the infra. association rates into Current BSS state structure */
memset(&priv->curbssparams.rates, 0, sizeof(priv->curbssparams.rates));
memcpy(&priv->curbssparams.rates, &rates->rates, tmplen);
/* Set MSB on basic rates as the firmware requires, but _after_
* copying to current bss rates.
*/
lbs_set_basic_rate_flags(rates->rates, tmplen);
/* Firmware v9+ indicate authentication suites as a TLV */
if (priv->fwrelease >= 0x09000000) {
auth = (struct mrvl_ie_auth_type *) pos;
auth->header.type = cpu_to_le16(TLV_TYPE_AUTH_TYPE);
auth->header.len = cpu_to_le16(2);
tmpauth = iw_auth_to_ieee_auth(priv->secinfo.auth_mode);
auth->auth = cpu_to_le16(tmpauth);
pos += sizeof(auth->header) + 2;
lbs_deb_join("AUTH_CMD: BSSID %pM, auth 0x%x\n",
bss->bssid, priv->secinfo.auth_mode);
}
/* WPA/WPA2 IEs */
if (assoc_req->secinfo.WPAenabled || assoc_req->secinfo.WPA2enabled) {
rsn = (struct mrvl_ie_rsn_param_set *) pos;
/* WPA_IE or WPA2_IE */
rsn->header.type = cpu_to_le16((u16) assoc_req->wpa_ie[0]);
tmplen = (u16) assoc_req->wpa_ie[1];
rsn->header.len = cpu_to_le16(tmplen);
memcpy(rsn->rsnie, &assoc_req->wpa_ie[2], tmplen);
lbs_deb_hex(LBS_DEB_JOIN, "ASSOC_CMD: WPA/RSN IE", (u8 *) rsn,
sizeof(rsn->header) + tmplen);
pos += sizeof(rsn->header) + tmplen;
}
cmd.hdr.size = cpu_to_le16((sizeof(cmd) - sizeof(cmd.iebuf)) +
(u16)(pos - (u8 *) &cmd.iebuf));
/* update curbssparams */
priv->curbssparams.channel = bss->phy.ds.channel;
if (lbs_parse_dnld_countryinfo_11d(priv, bss)) {
ret = -1;
goto done;
}
ret = lbs_cmd_with_response(priv, command, &cmd);
if (ret == 0) {
ret = lbs_assoc_post(priv,
(struct cmd_ds_802_11_associate_response *) &cmd);
}
done:
lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
return ret;
}
/**
* @brief Associate to a specific BSS discovered in a scan
*
* @param priv A pointer to struct lbs_private structure
* @param assoc_req The association request describing the BSS to associate with
*
* @return 0-success, otherwise fail
*/
static int lbs_try_associate(struct lbs_private *priv,
struct assoc_request *assoc_req)
{
int ret;
u8 preamble = RADIO_PREAMBLE_LONG;
lbs_deb_enter(LBS_DEB_ASSOC);
/* FW v9 and higher indicate authentication suites as a TLV in the
* association command, not as a separate authentication command.
*/
if (priv->fwrelease < 0x09000000) {
ret = lbs_set_authentication(priv, assoc_req->bss.bssid,
priv->secinfo.auth_mode);
if (ret)
goto out;
}
/* Use short preamble only when both the BSS and firmware support it */
if ((priv->capability & WLAN_CAPABILITY_SHORT_PREAMBLE) &&
(assoc_req->bss.capability & WLAN_CAPABILITY_SHORT_PREAMBLE))
preamble = RADIO_PREAMBLE_SHORT;
ret = lbs_set_radio(priv, preamble, 1);
if (ret)
goto out;
ret = lbs_associate(priv, assoc_req, CMD_802_11_ASSOCIATE);
out:
lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
return ret;
}
static int lbs_adhoc_post(struct lbs_private *priv,
struct cmd_ds_802_11_ad_hoc_result *resp)
{
int ret = 0;
u16 command = le16_to_cpu(resp->hdr.command);
u16 result = le16_to_cpu(resp->hdr.result);
union iwreq_data wrqu;
struct bss_descriptor *bss;
DECLARE_SSID_BUF(ssid);
lbs_deb_enter(LBS_DEB_JOIN);
if (!priv->in_progress_assoc_req) {
lbs_deb_join("ADHOC_RESP: no in-progress association "
"request\n");
ret = -1;
goto done;
}
bss = &priv->in_progress_assoc_req->bss;
/*
* Join result code 0 --> SUCCESS
*/
if (result) {
lbs_deb_join("ADHOC_RESP: failed (result 0x%X)\n", result);
if (priv->connect_status == LBS_CONNECTED)
lbs_mac_event_disconnected(priv);
ret = -1;
goto done;
}
/* Send a Media Connected event, according to the Spec */
priv->connect_status = LBS_CONNECTED;
if (command == CMD_RET(CMD_802_11_AD_HOC_START)) {
/* Update the created network descriptor with the new BSSID */
memcpy(bss->bssid, resp->bssid, ETH_ALEN);
}
/* Set the BSSID from the joined/started descriptor */
memcpy(&priv->curbssparams.bssid, bss->bssid, ETH_ALEN);
/* Set the new SSID to current SSID */
memcpy(&priv->curbssparams.ssid, &bss->ssid, IW_ESSID_MAX_SIZE);
priv->curbssparams.ssid_len = bss->ssid_len;
netif_carrier_on(priv->dev);
if (!priv->tx_pending_len)
netif_wake_queue(priv->dev);
memset(&wrqu, 0, sizeof(wrqu));
memcpy(wrqu.ap_addr.sa_data, priv->curbssparams.bssid, ETH_ALEN);
wrqu.ap_addr.sa_family = ARPHRD_ETHER;
wireless_send_event(priv->dev, SIOCGIWAP, &wrqu, NULL);
lbs_deb_join("ADHOC_RESP: Joined/started '%s', BSSID %pM, channel %d\n",
print_ssid(ssid, bss->ssid, bss->ssid_len),
priv->curbssparams.bssid,
priv->curbssparams.channel);
done:
lbs_deb_leave_args(LBS_DEB_JOIN, "ret %d", ret);
return ret;
}
/**
* @brief Join an adhoc network found in a previous scan
*
* @param priv A pointer to struct lbs_private structure
* @param assoc_req The association request describing the BSS to join
*
* @return 0 on success, error on failure
*/
static int lbs_adhoc_join(struct lbs_private *priv,
struct assoc_request *assoc_req)
{
struct cmd_ds_802_11_ad_hoc_join cmd;
struct bss_descriptor *bss = &assoc_req->bss;
u8 preamble = RADIO_PREAMBLE_LONG;
DECLARE_SSID_BUF(ssid);
u16 ratesize = 0;
int ret = 0;
lbs_deb_enter(LBS_DEB_ASSOC);
lbs_deb_join("current SSID '%s', ssid length %u\n",
print_ssid(ssid, priv->curbssparams.ssid,
priv->curbssparams.ssid_len),
priv->curbssparams.ssid_len);
lbs_deb_join("requested ssid '%s', ssid length %u\n",
print_ssid(ssid, bss->ssid, bss->ssid_len),
bss->ssid_len);
/* check if the requested SSID is already joined */
if (priv->curbssparams.ssid_len &&
!lbs_ssid_cmp(priv->curbssparams.ssid,
priv->curbssparams.ssid_len,
bss->ssid, bss->ssid_len) &&
(priv->mode == IW_MODE_ADHOC) &&
(priv->connect_status == LBS_CONNECTED)) {
union iwreq_data wrqu;
lbs_deb_join("ADHOC_J_CMD: New ad-hoc SSID is the same as "
"current, not attempting to re-join");
/* Send the re-association event though, because the association
* request really was successful, even if just a null-op.
*/
memset(&wrqu, 0, sizeof(wrqu));
memcpy(wrqu.ap_addr.sa_data, priv->curbssparams.bssid,
ETH_ALEN);
wrqu.ap_addr.sa_family = ARPHRD_ETHER;
wireless_send_event(priv->dev, SIOCGIWAP, &wrqu, NULL);
goto out;
}
/* Use short preamble only when both the BSS and firmware support it */
if ((priv->capability & WLAN_CAPABILITY_SHORT_PREAMBLE) &&
(bss->capability & WLAN_CAPABILITY_SHORT_PREAMBLE)) {
lbs_deb_join("AdhocJoin: Short preamble\n");
preamble = RADIO_PREAMBLE_SHORT;
}
ret = lbs_set_radio(priv, preamble, 1);
if (ret)
goto out;
lbs_deb_join("AdhocJoin: channel = %d\n", assoc_req->channel);
lbs_deb_join("AdhocJoin: band = %c\n", assoc_req->band);
priv->adhoccreate = 0;
priv->curbssparams.channel = bss->channel;
/* Build the join command */
memset(&cmd, 0, sizeof(cmd));
cmd.hdr.size = cpu_to_le16(sizeof(cmd));
cmd.bss.type = CMD_BSS_TYPE_IBSS;
cmd.bss.beaconperiod = cpu_to_le16(bss->beaconperiod);
memcpy(&cmd.bss.bssid, &bss->bssid, ETH_ALEN);
memcpy(&cmd.bss.ssid, &bss->ssid, bss->ssid_len);
memcpy(&cmd.bss.ds, &bss->phy.ds, sizeof(struct ieee_ie_ds_param_set));
memcpy(&cmd.bss.ibss, &bss->ss.ibss,
sizeof(struct ieee_ie_ibss_param_set));
cmd.bss.capability = cpu_to_le16(bss->capability & CAPINFO_MASK);
lbs_deb_join("ADHOC_J_CMD: tmpcap=%4X CAPINFO_MASK=%4X\n",
bss->capability, CAPINFO_MASK);
/* information on BSSID descriptor passed to FW */
lbs_deb_join("ADHOC_J_CMD: BSSID = %pM, SSID = '%s'\n",
cmd.bss.bssid, cmd.bss.ssid);
/* Only v8 and below support setting these */
if (priv->fwrelease < 0x09000000) {
/* failtimeout */
cmd.failtimeout = cpu_to_le16(MRVDRV_ASSOCIATION_TIME_OUT);
/* probedelay */
cmd.probedelay = cpu_to_le16(CMD_SCAN_PROBE_DELAY_TIME);
}
/* Copy Data rates from the rates recorded in scan response */
memset(cmd.bss.rates, 0, sizeof(cmd.bss.rates));
ratesize = min_t(u16, ARRAY_SIZE(cmd.bss.rates), ARRAY_SIZE (bss->rates));
memcpy(cmd.bss.rates, bss->rates, ratesize);
if (get_common_rates(priv, cmd.bss.rates, &ratesize)) {
lbs_deb_join("ADHOC_JOIN: get_common_rates returned error.\n");
ret = -1;
goto out;
}
/* Copy the ad-hoc creation rates into Current BSS state structure */
memset(&priv->curbssparams.rates, 0, sizeof(priv->curbssparams.rates));
memcpy(&priv->curbssparams.rates, cmd.bss.rates, ratesize);
/* Set MSB on basic rates as the firmware requires, but _after_
* copying to current bss rates.
*/
lbs_set_basic_rate_flags(cmd.bss.rates, ratesize);
cmd.bss.ibss.atimwindow = bss->atimwindow;
if (assoc_req->secinfo.wep_enabled) {
u16 tmp = le16_to_cpu(cmd.bss.capability);
tmp |= WLAN_CAPABILITY_PRIVACY;
cmd.bss.capability = cpu_to_le16(tmp);
}
if (priv->psmode == LBS802_11POWERMODEMAX_PSP) {
__le32 local_ps_mode = cpu_to_le32(LBS802_11POWERMODECAM);
/* wake up first */
ret = lbs_prepare_and_send_command(priv, CMD_802_11_PS_MODE,
CMD_ACT_SET, 0, 0,
&local_ps_mode);
if (ret) {
ret = -1;
goto out;
}
}
if (lbs_parse_dnld_countryinfo_11d(priv, bss)) {
ret = -1;
goto out;
}
ret = lbs_cmd_with_response(priv, CMD_802_11_AD_HOC_JOIN, &cmd);
if (ret == 0) {
ret = lbs_adhoc_post(priv,
(struct cmd_ds_802_11_ad_hoc_result *)&cmd);
}
out:
lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
return ret;
}
/**
* @brief Start an Adhoc Network
*
* @param priv A pointer to struct lbs_private structure
* @param assoc_req The association request describing the BSS to start
*
* @return 0 on success, error on failure
*/
static int lbs_adhoc_start(struct lbs_private *priv,
struct assoc_request *assoc_req)
{
struct cmd_ds_802_11_ad_hoc_start cmd;
u8 preamble = RADIO_PREAMBLE_LONG;
size_t ratesize = 0;
u16 tmpcap = 0;
int ret = 0;
DECLARE_SSID_BUF(ssid);
lbs_deb_enter(LBS_DEB_ASSOC);
if (priv->capability & WLAN_CAPABILITY_SHORT_PREAMBLE) {
lbs_deb_join("ADHOC_START: Will use short preamble\n");
preamble = RADIO_PREAMBLE_SHORT;
}
ret = lbs_set_radio(priv, preamble, 1);
if (ret)
goto out;
/* Build the start command */
memset(&cmd, 0, sizeof(cmd));
cmd.hdr.size = cpu_to_le16(sizeof(cmd));
memcpy(cmd.ssid, assoc_req->ssid, assoc_req->ssid_len);
lbs_deb_join("ADHOC_START: SSID '%s', ssid length %u\n",
print_ssid(ssid, assoc_req->ssid, assoc_req->ssid_len),
assoc_req->ssid_len);
cmd.bsstype = CMD_BSS_TYPE_IBSS;
if (priv->beacon_period == 0)
priv->beacon_period = MRVDRV_BEACON_INTERVAL;
cmd.beaconperiod = cpu_to_le16(priv->beacon_period);
WARN_ON(!assoc_req->channel);
/* set Physical parameter set */
cmd.ds.header.id = WLAN_EID_DS_PARAMS;
cmd.ds.header.len = 1;
cmd.ds.channel = assoc_req->channel;
/* set IBSS parameter set */
cmd.ibss.header.id = WLAN_EID_IBSS_PARAMS;
cmd.ibss.header.len = 2;
cmd.ibss.atimwindow = cpu_to_le16(0);
/* set capability info */
tmpcap = WLAN_CAPABILITY_IBSS;
if (assoc_req->secinfo.wep_enabled ||
assoc_req->secinfo.WPAenabled ||
assoc_req->secinfo.WPA2enabled) {
lbs_deb_join("ADHOC_START: WEP/WPA enabled, privacy on\n");
tmpcap |= WLAN_CAPABILITY_PRIVACY;
} else
lbs_deb_join("ADHOC_START: WEP disabled, privacy off\n");
cmd.capability = cpu_to_le16(tmpcap);
/* Only v8 and below support setting probe delay */
if (priv->fwrelease < 0x09000000)
cmd.probedelay = cpu_to_le16(CMD_SCAN_PROBE_DELAY_TIME);
ratesize = min(sizeof(cmd.rates), sizeof(lbs_bg_rates));
memcpy(cmd.rates, lbs_bg_rates, ratesize);
/* Copy the ad-hoc creating rates into Current BSS state structure */
memset(&priv->curbssparams.rates, 0, sizeof(priv->curbssparams.rates));
memcpy(&priv->curbssparams.rates, &cmd.rates, ratesize);
/* Set MSB on basic rates as the firmware requires, but _after_
* copying to current bss rates.
*/
lbs_set_basic_rate_flags(cmd.rates, ratesize);
lbs_deb_join("ADHOC_START: rates=%02x %02x %02x %02x\n",
cmd.rates[0], cmd.rates[1], cmd.rates[2], cmd.rates[3]);
if (lbs_create_dnld_countryinfo_11d(priv)) {
lbs_deb_join("ADHOC_START: dnld_countryinfo_11d failed\n");
ret = -1;
goto out;
}
lbs_deb_join("ADHOC_START: Starting Ad-Hoc BSS on channel %d, band %d\n",
assoc_req->channel, assoc_req->band);
priv->adhoccreate = 1;
priv->mode = IW_MODE_ADHOC;
ret = lbs_cmd_with_response(priv, CMD_802_11_AD_HOC_START, &cmd);
if (ret == 0)
ret = lbs_adhoc_post(priv,
(struct cmd_ds_802_11_ad_hoc_result *)&cmd);
out:
lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
return ret;
}
/**
* @brief Stop and Ad-Hoc network and exit Ad-Hoc mode
*
* @param priv A pointer to struct lbs_private structure
* @return 0 on success, or an error
*/
int lbs_adhoc_stop(struct lbs_private *priv)
{
struct cmd_ds_802_11_ad_hoc_stop cmd;
int ret;
lbs_deb_enter(LBS_DEB_JOIN);
memset(&cmd, 0, sizeof (cmd));
cmd.hdr.size = cpu_to_le16 (sizeof (cmd));
ret = lbs_cmd_with_response(priv, CMD_802_11_AD_HOC_STOP, &cmd);
/* Clean up everything even if there was an error */
lbs_mac_event_disconnected(priv);
lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
return ret;
}
static inline int match_bss_no_security(struct lbs_802_11_security *secinfo,
struct bss_descriptor *match_bss)
{
if (!secinfo->wep_enabled && !secinfo->WPAenabled
&& !secinfo->WPA2enabled
&& match_bss->wpa_ie[0] != WLAN_EID_GENERIC
&& match_bss->rsn_ie[0] != WLAN_EID_RSN
&& !(match_bss->capability & WLAN_CAPABILITY_PRIVACY))
return 1;
else
return 0;
}
static inline int match_bss_static_wep(struct lbs_802_11_security *secinfo,
struct bss_descriptor *match_bss)
{
if (secinfo->wep_enabled && !secinfo->WPAenabled
&& !secinfo->WPA2enabled
&& (match_bss->capability & WLAN_CAPABILITY_PRIVACY))
return 1;
else
return 0;
}
static inline int match_bss_wpa(struct lbs_802_11_security *secinfo,
struct bss_descriptor *match_bss)
{
if (!secinfo->wep_enabled && secinfo->WPAenabled
&& (match_bss->wpa_ie[0] == WLAN_EID_GENERIC)
/* privacy bit may NOT be set in some APs like LinkSys WRT54G
&& (match_bss->capability & WLAN_CAPABILITY_PRIVACY) */
)
return 1;
else
return 0;
}
static inline int match_bss_wpa2(struct lbs_802_11_security *secinfo,
struct bss_descriptor *match_bss)
{
if (!secinfo->wep_enabled && secinfo->WPA2enabled &&
(match_bss->rsn_ie[0] == WLAN_EID_RSN)
/* privacy bit may NOT be set in some APs like LinkSys WRT54G
(match_bss->capability & WLAN_CAPABILITY_PRIVACY) */
)
return 1;
else
return 0;
}
static inline int match_bss_dynamic_wep(struct lbs_802_11_security *secinfo,
struct bss_descriptor *match_bss)
{
if (!secinfo->wep_enabled && !secinfo->WPAenabled
&& !secinfo->WPA2enabled
&& (match_bss->wpa_ie[0] != WLAN_EID_GENERIC)
&& (match_bss->rsn_ie[0] != WLAN_EID_RSN)
&& (match_bss->capability & WLAN_CAPABILITY_PRIVACY))
return 1;
else
return 0;
}
/**
* @brief Check if a scanned network compatible with the driver settings
*
* WEP WPA WPA2 ad-hoc encrypt Network
* enabled enabled enabled AES mode privacy WPA WPA2 Compatible
* 0 0 0 0 NONE 0 0 0 yes No security
* 1 0 0 0 NONE 1 0 0 yes Static WEP
* 0 1 0 0 x 1x 1 x yes WPA
* 0 0 1 0 x 1x x 1 yes WPA2
* 0 0 0 1 NONE 1 0 0 yes Ad-hoc AES
* 0 0 0 0 !=NONE 1 0 0 yes Dynamic WEP
*
*
* @param priv A pointer to struct lbs_private
* @param index Index in scantable to check against current driver settings
* @param mode Network mode: Infrastructure or IBSS
*
* @return Index in scantable, or error code if negative
*/
static int is_network_compatible(struct lbs_private *priv,
struct bss_descriptor *bss, uint8_t mode)
{
int matched = 0;
lbs_deb_enter(LBS_DEB_SCAN);
if (bss->mode != mode)
goto done;
matched = match_bss_no_security(&priv->secinfo, bss);
if (matched)
goto done;
matched = match_bss_static_wep(&priv->secinfo, bss);
if (matched)
goto done;
matched = match_bss_wpa(&priv->secinfo, bss);
if (matched) {
lbs_deb_scan("is_network_compatible() WPA: wpa_ie 0x%x "
"wpa2_ie 0x%x WEP %s WPA %s WPA2 %s "
"privacy 0x%x\n", bss->wpa_ie[0], bss->rsn_ie[0],
priv->secinfo.wep_enabled ? "e" : "d",
priv->secinfo.WPAenabled ? "e" : "d",
priv->secinfo.WPA2enabled ? "e" : "d",
(bss->capability & WLAN_CAPABILITY_PRIVACY));
goto done;
}
matched = match_bss_wpa2(&priv->secinfo, bss);
if (matched) {
lbs_deb_scan("is_network_compatible() WPA2: wpa_ie 0x%x "
"wpa2_ie 0x%x WEP %s WPA %s WPA2 %s "
"privacy 0x%x\n", bss->wpa_ie[0], bss->rsn_ie[0],
priv->secinfo.wep_enabled ? "e" : "d",
priv->secinfo.WPAenabled ? "e" : "d",
priv->secinfo.WPA2enabled ? "e" : "d",
(bss->capability & WLAN_CAPABILITY_PRIVACY));
goto done;
}
matched = match_bss_dynamic_wep(&priv->secinfo, bss);
if (matched) {
lbs_deb_scan("is_network_compatible() dynamic WEP: "
"wpa_ie 0x%x wpa2_ie 0x%x privacy 0x%x\n",
bss->wpa_ie[0], bss->rsn_ie[0],
(bss->capability & WLAN_CAPABILITY_PRIVACY));
goto done;
}
/* bss security settings don't match those configured on card */
lbs_deb_scan("is_network_compatible() FAILED: wpa_ie 0x%x "
"wpa2_ie 0x%x WEP %s WPA %s WPA2 %s privacy 0x%x\n",
bss->wpa_ie[0], bss->rsn_ie[0],
priv->secinfo.wep_enabled ? "e" : "d",
priv->secinfo.WPAenabled ? "e" : "d",
priv->secinfo.WPA2enabled ? "e" : "d",
(bss->capability & WLAN_CAPABILITY_PRIVACY));
done:
lbs_deb_leave_args(LBS_DEB_SCAN, "matched: %d", matched);
return matched;
}
/**
* @brief This function finds a specific compatible BSSID in the scan list
*
* Used in association code
*
* @param priv A pointer to struct lbs_private
* @param bssid BSSID to find in the scan list
* @param mode Network mode: Infrastructure or IBSS
*
* @return index in BSSID list, or error return code (< 0)
*/
static struct bss_descriptor *lbs_find_bssid_in_list(struct lbs_private *priv,
uint8_t *bssid, uint8_t mode)
{
struct bss_descriptor *iter_bss;
struct bss_descriptor *found_bss = NULL;
lbs_deb_enter(LBS_DEB_SCAN);
if (!bssid)
goto out;
lbs_deb_hex(LBS_DEB_SCAN, "looking for", bssid, ETH_ALEN);
/* Look through the scan table for a compatible match. The loop will
* continue past a matched bssid that is not compatible in case there
* is an AP with multiple SSIDs assigned to the same BSSID
*/
mutex_lock(&priv->lock);
list_for_each_entry(iter_bss, &priv->network_list, list) {
if (compare_ether_addr(iter_bss->bssid, bssid))
continue; /* bssid doesn't match */
switch (mode) {
case IW_MODE_INFRA:
case IW_MODE_ADHOC:
if (!is_network_compatible(priv, iter_bss, mode))
break;
found_bss = iter_bss;
break;
default:
found_bss = iter_bss;
break;
}
}
mutex_unlock(&priv->lock);
out:
lbs_deb_leave_args(LBS_DEB_SCAN, "found_bss %p", found_bss);
return found_bss;
}
/**
* @brief This function finds ssid in ssid list.
*
* Used in association code
*
* @param priv A pointer to struct lbs_private
* @param ssid SSID to find in the list
* @param bssid BSSID to qualify the SSID selection (if provided)
* @param mode Network mode: Infrastructure or IBSS
*
* @return index in BSSID list
*/
static struct bss_descriptor *lbs_find_ssid_in_list(struct lbs_private *priv,
uint8_t *ssid, uint8_t ssid_len,
uint8_t *bssid, uint8_t mode,
int channel)
{
u32 bestrssi = 0;
struct bss_descriptor *iter_bss = NULL;
struct bss_descriptor *found_bss = NULL;
struct bss_descriptor *tmp_oldest = NULL;
lbs_deb_enter(LBS_DEB_SCAN);
mutex_lock(&priv->lock);
list_for_each_entry(iter_bss, &priv->network_list, list) {
if (!tmp_oldest ||
(iter_bss->last_scanned < tmp_oldest->last_scanned))
tmp_oldest = iter_bss;
if (lbs_ssid_cmp(iter_bss->ssid, iter_bss->ssid_len,
ssid, ssid_len) != 0)
continue; /* ssid doesn't match */
if (bssid && compare_ether_addr(iter_bss->bssid, bssid) != 0)
continue; /* bssid doesn't match */
if ((channel > 0) && (iter_bss->channel != channel))
continue; /* channel doesn't match */
switch (mode) {
case IW_MODE_INFRA:
case IW_MODE_ADHOC:
if (!is_network_compatible(priv, iter_bss, mode))
break;
if (bssid) {
/* Found requested BSSID */
found_bss = iter_bss;
goto out;
}
if (SCAN_RSSI(iter_bss->rssi) > bestrssi) {
bestrssi = SCAN_RSSI(iter_bss->rssi);
found_bss = iter_bss;
}
break;
case IW_MODE_AUTO:
default:
if (SCAN_RSSI(iter_bss->rssi) > bestrssi) {
bestrssi = SCAN_RSSI(iter_bss->rssi);
found_bss = iter_bss;
}
break;
}
}
out:
mutex_unlock(&priv->lock);
lbs_deb_leave_args(LBS_DEB_SCAN, "found_bss %p", found_bss);
return found_bss;
}
static int assoc_helper_essid(struct lbs_private *priv,
struct assoc_request * assoc_req)
{
int ret = 0;
struct bss_descriptor * bss;
int channel = -1;
DECLARE_SSID_BUF(ssid);
lbs_deb_enter(LBS_DEB_ASSOC);
/* FIXME: take channel into account when picking SSIDs if a channel
* is set.
*/
if (test_bit(ASSOC_FLAG_CHANNEL, &assoc_req->flags))
channel = assoc_req->channel;
lbs_deb_assoc("SSID '%s' requested\n",
print_ssid(ssid, assoc_req->ssid, assoc_req->ssid_len));
if (assoc_req->mode == IW_MODE_INFRA) {
lbs_send_specific_ssid_scan(priv, assoc_req->ssid,
assoc_req->ssid_len);
bss = lbs_find_ssid_in_list(priv, assoc_req->ssid,
assoc_req->ssid_len, NULL, IW_MODE_INFRA, channel);
if (bss != NULL) {
memcpy(&assoc_req->bss, bss, sizeof(struct bss_descriptor));
ret = lbs_try_associate(priv, assoc_req);
} else {
lbs_deb_assoc("SSID not found; cannot associate\n");
}
} else if (assoc_req->mode == IW_MODE_ADHOC) {
/* Scan for the network, do not save previous results. Stale
* scan data will cause us to join a non-existant adhoc network
*/
lbs_send_specific_ssid_scan(priv, assoc_req->ssid,
assoc_req->ssid_len);
/* Search for the requested SSID in the scan table */
bss = lbs_find_ssid_in_list(priv, assoc_req->ssid,
assoc_req->ssid_len, NULL, IW_MODE_ADHOC, channel);
if (bss != NULL) {
lbs_deb_assoc("SSID found, will join\n");
memcpy(&assoc_req->bss, bss, sizeof(struct bss_descriptor));
lbs_adhoc_join(priv, assoc_req);
} else {
/* else send START command */
lbs_deb_assoc("SSID not found, creating adhoc network\n");
memcpy(&assoc_req->bss.ssid, &assoc_req->ssid,
IW_ESSID_MAX_SIZE);
assoc_req->bss.ssid_len = assoc_req->ssid_len;
lbs_adhoc_start(priv, assoc_req);
}
}
lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
return ret;
}
static int assoc_helper_bssid(struct lbs_private *priv,
struct assoc_request * assoc_req)
{
int ret = 0;
struct bss_descriptor * bss;
lbs_deb_enter_args(LBS_DEB_ASSOC, "BSSID %pM", assoc_req->bssid);
/* Search for index position in list for requested MAC */
bss = lbs_find_bssid_in_list(priv, assoc_req->bssid,
assoc_req->mode);
if (bss == NULL) {
lbs_deb_assoc("ASSOC: WAP: BSSID %pM not found, "
"cannot associate.\n", assoc_req->bssid);
goto out;
}
memcpy(&assoc_req->bss, bss, sizeof(struct bss_descriptor));
if (assoc_req->mode == IW_MODE_INFRA) {
ret = lbs_try_associate(priv, assoc_req);
lbs_deb_assoc("ASSOC: lbs_try_associate(bssid) returned %d\n",
ret);
} else if (assoc_req->mode == IW_MODE_ADHOC) {
lbs_adhoc_join(priv, assoc_req);
}
out:
lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
return ret;
}
static int assoc_helper_associate(struct lbs_private *priv,
struct assoc_request * assoc_req)
{
int ret = 0, done = 0;
lbs_deb_enter(LBS_DEB_ASSOC);
/* If we're given and 'any' BSSID, try associating based on SSID */
if (test_bit(ASSOC_FLAG_BSSID, &assoc_req->flags)) {
if (compare_ether_addr(bssid_any, assoc_req->bssid)
&& compare_ether_addr(bssid_off, assoc_req->bssid)) {
ret = assoc_helper_bssid(priv, assoc_req);
done = 1;
}
}
if (!done && test_bit(ASSOC_FLAG_SSID, &assoc_req->flags)) {
ret = assoc_helper_essid(priv, assoc_req);
}
lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
return ret;
}
static int assoc_helper_mode(struct lbs_private *priv,
struct assoc_request * assoc_req)
{
int ret = 0;
lbs_deb_enter(LBS_DEB_ASSOC);
if (assoc_req->mode == priv->mode)
goto done;
if (assoc_req->mode == IW_MODE_INFRA) {
if (priv->psstate != PS_STATE_FULL_POWER)
lbs_ps_wakeup(priv, CMD_OPTION_WAITFORRSP);
priv->psmode = LBS802_11POWERMODECAM;
}
priv->mode = assoc_req->mode;
ret = lbs_set_snmp_mib(priv, SNMP_MIB_OID_BSS_TYPE, assoc_req->mode);
done:
lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
return ret;
}
static int assoc_helper_channel(struct lbs_private *priv,
struct assoc_request * assoc_req)
{
int ret = 0;
lbs_deb_enter(LBS_DEB_ASSOC);
ret = lbs_update_channel(priv);
if (ret) {
lbs_deb_assoc("ASSOC: channel: error getting channel.\n");
goto done;
}
if (assoc_req->channel == priv->curbssparams.channel)
goto done;
if (priv->mesh_dev) {
/* Change mesh channel first; 21.p21 firmware won't let
you change channel otherwise (even though it'll return
an error to this */
lbs_mesh_config(priv, CMD_ACT_MESH_CONFIG_STOP,
assoc_req->channel);
}
lbs_deb_assoc("ASSOC: channel: %d -> %d\n",
priv->curbssparams.channel, assoc_req->channel);
ret = lbs_set_channel(priv, assoc_req->channel);
if (ret < 0)
lbs_deb_assoc("ASSOC: channel: error setting channel.\n");
/* FIXME: shouldn't need to grab the channel _again_ after setting
* it since the firmware is supposed to return the new channel, but
* whatever... */
ret = lbs_update_channel(priv);
if (ret) {
lbs_deb_assoc("ASSOC: channel: error getting channel.\n");
goto done;
}
if (assoc_req->channel != priv->curbssparams.channel) {
lbs_deb_assoc("ASSOC: channel: failed to update channel to %d\n",
assoc_req->channel);
goto restore_mesh;
}
if ( assoc_req->secinfo.wep_enabled
&& (assoc_req->wep_keys[0].len
|| assoc_req->wep_keys[1].len
|| assoc_req->wep_keys[2].len
|| assoc_req->wep_keys[3].len)) {
/* Make sure WEP keys are re-sent to firmware */
set_bit(ASSOC_FLAG_WEP_KEYS, &assoc_req->flags);
}
/* Must restart/rejoin adhoc networks after channel change */
set_bit(ASSOC_FLAG_SSID, &assoc_req->flags);
restore_mesh:
if (priv->mesh_dev)
lbs_mesh_config(priv, CMD_ACT_MESH_CONFIG_START,
priv->curbssparams.channel);
done:
lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
return ret;
}
static int assoc_helper_wep_keys(struct lbs_private *priv,
struct assoc_request *assoc_req)
{
int i;
int ret = 0;
lbs_deb_enter(LBS_DEB_ASSOC);
/* Set or remove WEP keys */
if (assoc_req->wep_keys[0].len || assoc_req->wep_keys[1].len ||
assoc_req->wep_keys[2].len || assoc_req->wep_keys[3].len)
ret = lbs_cmd_802_11_set_wep(priv, CMD_ACT_ADD, assoc_req);
else
ret = lbs_cmd_802_11_set_wep(priv, CMD_ACT_REMOVE, assoc_req);
if (ret)
goto out;
/* enable/disable the MAC's WEP packet filter */
if (assoc_req->secinfo.wep_enabled)
priv->mac_control |= CMD_ACT_MAC_WEP_ENABLE;
else
priv->mac_control &= ~CMD_ACT_MAC_WEP_ENABLE;
lbs_set_mac_control(priv);
mutex_lock(&priv->lock);
/* Copy WEP keys into priv wep key fields */
for (i = 0; i < 4; i++) {
memcpy(&priv->wep_keys[i], &assoc_req->wep_keys[i],
sizeof(struct enc_key));
}
priv->wep_tx_keyidx = assoc_req->wep_tx_keyidx;
mutex_unlock(&priv->lock);
out:
lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
return ret;
}
static int assoc_helper_secinfo(struct lbs_private *priv,
struct assoc_request * assoc_req)
{
int ret = 0;
uint16_t do_wpa;
uint16_t rsn = 0;
lbs_deb_enter(LBS_DEB_ASSOC);
memcpy(&priv->secinfo, &assoc_req->secinfo,
sizeof(struct lbs_802_11_security));
lbs_set_mac_control(priv);
/* If RSN is already enabled, don't try to enable it again, since
* ENABLE_RSN resets internal state machines and will clobber the
* 4-way WPA handshake.
*/
/* Get RSN enabled/disabled */
ret = lbs_cmd_802_11_enable_rsn(priv, CMD_ACT_GET, &rsn);
if (ret) {
lbs_deb_assoc("Failed to get RSN status: %d\n", ret);
goto out;
}
/* Don't re-enable RSN if it's already enabled */
do_wpa = assoc_req->secinfo.WPAenabled || assoc_req->secinfo.WPA2enabled;
if (do_wpa == rsn)
goto out;
/* Set RSN enabled/disabled */
ret = lbs_cmd_802_11_enable_rsn(priv, CMD_ACT_SET, &do_wpa);
out:
lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
return ret;
}
static int assoc_helper_wpa_keys(struct lbs_private *priv,
struct assoc_request * assoc_req)
{
int ret = 0;
unsigned int flags = assoc_req->flags;
lbs_deb_enter(LBS_DEB_ASSOC);
/* Work around older firmware bug where WPA unicast and multicast
* keys must be set independently. Seen in SDIO parts with firmware
* version 5.0.11p0.
*/
if (test_bit(ASSOC_FLAG_WPA_UCAST_KEY, &assoc_req->flags)) {
clear_bit(ASSOC_FLAG_WPA_MCAST_KEY, &assoc_req->flags);
ret = lbs_cmd_802_11_key_material(priv, CMD_ACT_SET, assoc_req);
assoc_req->flags = flags;
}
if (ret)
goto out;
memcpy(&priv->wpa_unicast_key, &assoc_req->wpa_unicast_key,
sizeof(struct enc_key));
if (test_bit(ASSOC_FLAG_WPA_MCAST_KEY, &assoc_req->flags)) {
clear_bit(ASSOC_FLAG_WPA_UCAST_KEY, &assoc_req->flags);
ret = lbs_cmd_802_11_key_material(priv, CMD_ACT_SET, assoc_req);
assoc_req->flags = flags;
memcpy(&priv->wpa_mcast_key, &assoc_req->wpa_mcast_key,
sizeof(struct enc_key));
}
out:
lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
return ret;
}
static int assoc_helper_wpa_ie(struct lbs_private *priv,
struct assoc_request * assoc_req)
{
int ret = 0;
lbs_deb_enter(LBS_DEB_ASSOC);
if (assoc_req->secinfo.WPAenabled || assoc_req->secinfo.WPA2enabled) {
memcpy(&priv->wpa_ie, &assoc_req->wpa_ie, assoc_req->wpa_ie_len);
priv->wpa_ie_len = assoc_req->wpa_ie_len;
} else {
memset(&priv->wpa_ie, 0, MAX_WPA_IE_LEN);
priv->wpa_ie_len = 0;
}
lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
return ret;
}
static int should_deauth_infrastructure(struct lbs_private *priv,
struct assoc_request * assoc_req)
{
int ret = 0;
if (priv->connect_status != LBS_CONNECTED)
return 0;
lbs_deb_enter(LBS_DEB_ASSOC);
if (test_bit(ASSOC_FLAG_SSID, &assoc_req->flags)) {
lbs_deb_assoc("Deauthenticating due to new SSID\n");
ret = 1;
goto out;
}
if (test_bit(ASSOC_FLAG_SECINFO, &assoc_req->flags)) {
if (priv->secinfo.auth_mode != assoc_req->secinfo.auth_mode) {
lbs_deb_assoc("Deauthenticating due to new security\n");
ret = 1;
goto out;
}
}
if (test_bit(ASSOC_FLAG_BSSID, &assoc_req->flags)) {
lbs_deb_assoc("Deauthenticating due to new BSSID\n");
ret = 1;
goto out;
}
if (test_bit(ASSOC_FLAG_CHANNEL, &assoc_req->flags)) {
lbs_deb_assoc("Deauthenticating due to channel switch\n");
ret = 1;
goto out;
}
/* FIXME: deal with 'auto' mode somehow */
if (test_bit(ASSOC_FLAG_MODE, &assoc_req->flags)) {
if (assoc_req->mode != IW_MODE_INFRA) {
lbs_deb_assoc("Deauthenticating due to leaving "
"infra mode\n");
ret = 1;
goto out;
}
}
out:
lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
return ret;
}
static int should_stop_adhoc(struct lbs_private *priv,
struct assoc_request * assoc_req)
{
lbs_deb_enter(LBS_DEB_ASSOC);
if (priv->connect_status != LBS_CONNECTED)
return 0;
if (lbs_ssid_cmp(priv->curbssparams.ssid,
priv->curbssparams.ssid_len,
assoc_req->ssid, assoc_req->ssid_len) != 0)
return 1;
/* FIXME: deal with 'auto' mode somehow */
if (test_bit(ASSOC_FLAG_MODE, &assoc_req->flags)) {
if (assoc_req->mode != IW_MODE_ADHOC)
return 1;
}
if (test_bit(ASSOC_FLAG_CHANNEL, &assoc_req->flags)) {
if (assoc_req->channel != priv->curbssparams.channel)
return 1;
}
lbs_deb_leave(LBS_DEB_ASSOC);
return 0;
}
/**
* @brief This function finds the best SSID in the Scan List
*
* Search the scan table for the best SSID that also matches the current
* adapter network preference (infrastructure or adhoc)
*
* @param priv A pointer to struct lbs_private
*
* @return index in BSSID list
*/
static struct bss_descriptor *lbs_find_best_ssid_in_list(
struct lbs_private *priv, uint8_t mode)
{
uint8_t bestrssi = 0;
struct bss_descriptor *iter_bss;
struct bss_descriptor *best_bss = NULL;
lbs_deb_enter(LBS_DEB_SCAN);
mutex_lock(&priv->lock);
list_for_each_entry(iter_bss, &priv->network_list, list) {
switch (mode) {
case IW_MODE_INFRA:
case IW_MODE_ADHOC:
if (!is_network_compatible(priv, iter_bss, mode))
break;
if (SCAN_RSSI(iter_bss->rssi) <= bestrssi)
break;
bestrssi = SCAN_RSSI(iter_bss->rssi);
best_bss = iter_bss;
break;
case IW_MODE_AUTO:
default:
if (SCAN_RSSI(iter_bss->rssi) <= bestrssi)
break;
bestrssi = SCAN_RSSI(iter_bss->rssi);
best_bss = iter_bss;
break;
}
}
mutex_unlock(&priv->lock);
lbs_deb_leave_args(LBS_DEB_SCAN, "best_bss %p", best_bss);
return best_bss;
}
/**
* @brief Find the best AP
*
* Used from association worker.
*
* @param priv A pointer to struct lbs_private structure
* @param pSSID A pointer to AP's ssid
*
* @return 0--success, otherwise--fail
*/
static int lbs_find_best_network_ssid(struct lbs_private *priv,
uint8_t *out_ssid, uint8_t *out_ssid_len, uint8_t preferred_mode,
uint8_t *out_mode)
{
int ret = -1;
struct bss_descriptor *found;
lbs_deb_enter(LBS_DEB_SCAN);
priv->scan_ssid_len = 0;
lbs_scan_networks(priv, 1);
if (priv->surpriseremoved)
goto out;
found = lbs_find_best_ssid_in_list(priv, preferred_mode);
if (found && (found->ssid_len > 0)) {
memcpy(out_ssid, &found->ssid, IW_ESSID_MAX_SIZE);
*out_ssid_len = found->ssid_len;
*out_mode = found->mode;
ret = 0;
}
out:
lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret);
return ret;
}
void lbs_association_worker(struct work_struct *work)
{
struct lbs_private *priv = container_of(work, struct lbs_private,
assoc_work.work);
struct assoc_request * assoc_req = NULL;
int ret = 0;
int find_any_ssid = 0;
DECLARE_SSID_BUF(ssid);
lbs_deb_enter(LBS_DEB_ASSOC);
mutex_lock(&priv->lock);
assoc_req = priv->pending_assoc_req;
priv->pending_assoc_req = NULL;
priv->in_progress_assoc_req = assoc_req;
mutex_unlock(&priv->lock);
if (!assoc_req)
goto done;
lbs_deb_assoc(
"Association Request:\n"
" flags: 0x%08lx\n"
" SSID: '%s'\n"
" chann: %d\n"
" band: %d\n"
" mode: %d\n"
" BSSID: %pM\n"
" secinfo: %s%s%s\n"
" auth_mode: %d\n",
assoc_req->flags,
print_ssid(ssid, assoc_req->ssid, assoc_req->ssid_len),
assoc_req->channel, assoc_req->band, assoc_req->mode,
assoc_req->bssid,
assoc_req->secinfo.WPAenabled ? " WPA" : "",
assoc_req->secinfo.WPA2enabled ? " WPA2" : "",
assoc_req->secinfo.wep_enabled ? " WEP" : "",
assoc_req->secinfo.auth_mode);
/* If 'any' SSID was specified, find an SSID to associate with */
if (test_bit(ASSOC_FLAG_SSID, &assoc_req->flags)
&& !assoc_req->ssid_len)
find_any_ssid = 1;
/* But don't use 'any' SSID if there's a valid locked BSSID to use */
if (test_bit(ASSOC_FLAG_BSSID, &assoc_req->flags)) {
if (compare_ether_addr(assoc_req->bssid, bssid_any)
&& compare_ether_addr(assoc_req->bssid, bssid_off))
find_any_ssid = 0;
}
if (find_any_ssid) {
u8 new_mode = assoc_req->mode;
ret = lbs_find_best_network_ssid(priv, assoc_req->ssid,
&assoc_req->ssid_len, assoc_req->mode, &new_mode);
if (ret) {
lbs_deb_assoc("Could not find best network\n");
ret = -ENETUNREACH;
goto out;
}
/* Ensure we switch to the mode of the AP */
if (assoc_req->mode == IW_MODE_AUTO) {
set_bit(ASSOC_FLAG_MODE, &assoc_req->flags);
assoc_req->mode = new_mode;
}
}
/*
* Check if the attributes being changing require deauthentication
* from the currently associated infrastructure access point.
*/
if (priv->mode == IW_MODE_INFRA) {
if (should_deauth_infrastructure(priv, assoc_req)) {
ret = lbs_cmd_80211_deauthenticate(priv,
priv->curbssparams.bssid,
WLAN_REASON_DEAUTH_LEAVING);
if (ret) {
lbs_deb_assoc("Deauthentication due to new "
"configuration request failed: %d\n",
ret);
}
}
} else if (priv->mode == IW_MODE_ADHOC) {
if (should_stop_adhoc(priv, assoc_req)) {
ret = lbs_adhoc_stop(priv);
if (ret) {
lbs_deb_assoc("Teardown of AdHoc network due to "
"new configuration request failed: %d\n",
ret);
}
}
}
/* Send the various configuration bits to the firmware */
if (test_bit(ASSOC_FLAG_MODE, &assoc_req->flags)) {
ret = assoc_helper_mode(priv, assoc_req);
if (ret)
goto out;
}
if (test_bit(ASSOC_FLAG_CHANNEL, &assoc_req->flags)) {
ret = assoc_helper_channel(priv, assoc_req);
if (ret)
goto out;
}
if ( test_bit(ASSOC_FLAG_WEP_KEYS, &assoc_req->flags)
|| test_bit(ASSOC_FLAG_WEP_TX_KEYIDX, &assoc_req->flags)) {
ret = assoc_helper_wep_keys(priv, assoc_req);
if (ret)
goto out;
}
if (test_bit(ASSOC_FLAG_SECINFO, &assoc_req->flags)) {
ret = assoc_helper_secinfo(priv, assoc_req);
if (ret)
goto out;
}
if (test_bit(ASSOC_FLAG_WPA_IE, &assoc_req->flags)) {
ret = assoc_helper_wpa_ie(priv, assoc_req);
if (ret)
goto out;
}
if (test_bit(ASSOC_FLAG_WPA_MCAST_KEY, &assoc_req->flags)
|| test_bit(ASSOC_FLAG_WPA_UCAST_KEY, &assoc_req->flags)) {
ret = assoc_helper_wpa_keys(priv, assoc_req);
if (ret)
goto out;
}
/* SSID/BSSID should be the _last_ config option set, because they
* trigger the association attempt.
*/
if (test_bit(ASSOC_FLAG_BSSID, &assoc_req->flags)
|| test_bit(ASSOC_FLAG_SSID, &assoc_req->flags)) {
int success = 1;
ret = assoc_helper_associate(priv, assoc_req);
if (ret) {
lbs_deb_assoc("ASSOC: association unsuccessful: %d\n",
ret);
success = 0;
}
if (priv->connect_status != LBS_CONNECTED) {
lbs_deb_assoc("ASSOC: association unsuccessful, "
"not connected\n");
success = 0;
}
if (success) {
lbs_deb_assoc("associated to %pM\n",
priv->curbssparams.bssid);
lbs_prepare_and_send_command(priv,
CMD_802_11_RSSI,
0, CMD_OPTION_WAITFORRSP, 0, NULL);
} else {
ret = -1;
}
}
out:
if (ret) {
lbs_deb_assoc("ASSOC: reconfiguration attempt unsuccessful: %d\n",
ret);
}
mutex_lock(&priv->lock);
priv->in_progress_assoc_req = NULL;
mutex_unlock(&priv->lock);
kfree(assoc_req);
done:
lbs_deb_leave(LBS_DEB_ASSOC);
}
/*
* Caller MUST hold any necessary locks
*/
struct assoc_request *lbs_get_association_request(struct lbs_private *priv)
{
struct assoc_request * assoc_req;
lbs_deb_enter(LBS_DEB_ASSOC);
if (!priv->pending_assoc_req) {
priv->pending_assoc_req = kzalloc(sizeof(struct assoc_request),
GFP_KERNEL);
if (!priv->pending_assoc_req) {
lbs_pr_info("Not enough memory to allocate association"
" request!\n");
return NULL;
}
}
/* Copy current configuration attributes to the association request,
* but don't overwrite any that are already set.
*/
assoc_req = priv->pending_assoc_req;
if (!test_bit(ASSOC_FLAG_SSID, &assoc_req->flags)) {
memcpy(&assoc_req->ssid, &priv->curbssparams.ssid,
IW_ESSID_MAX_SIZE);
assoc_req->ssid_len = priv->curbssparams.ssid_len;
}
if (!test_bit(ASSOC_FLAG_CHANNEL, &assoc_req->flags))
assoc_req->channel = priv->curbssparams.channel;
if (!test_bit(ASSOC_FLAG_BAND, &assoc_req->flags))
assoc_req->band = priv->curbssparams.band;
if (!test_bit(ASSOC_FLAG_MODE, &assoc_req->flags))
assoc_req->mode = priv->mode;
if (!test_bit(ASSOC_FLAG_BSSID, &assoc_req->flags)) {
memcpy(&assoc_req->bssid, priv->curbssparams.bssid,
ETH_ALEN);
}
if (!test_bit(ASSOC_FLAG_WEP_KEYS, &assoc_req->flags)) {
int i;
for (i = 0; i < 4; i++) {
memcpy(&assoc_req->wep_keys[i], &priv->wep_keys[i],
sizeof(struct enc_key));
}
}
if (!test_bit(ASSOC_FLAG_WEP_TX_KEYIDX, &assoc_req->flags))
assoc_req->wep_tx_keyidx = priv->wep_tx_keyidx;
if (!test_bit(ASSOC_FLAG_WPA_MCAST_KEY, &assoc_req->flags)) {
memcpy(&assoc_req->wpa_mcast_key, &priv->wpa_mcast_key,
sizeof(struct enc_key));
}
if (!test_bit(ASSOC_FLAG_WPA_UCAST_KEY, &assoc_req->flags)) {
memcpy(&assoc_req->wpa_unicast_key, &priv->wpa_unicast_key,
sizeof(struct enc_key));
}
if (!test_bit(ASSOC_FLAG_SECINFO, &assoc_req->flags)) {
memcpy(&assoc_req->secinfo, &priv->secinfo,
sizeof(struct lbs_802_11_security));
}
if (!test_bit(ASSOC_FLAG_WPA_IE, &assoc_req->flags)) {
memcpy(&assoc_req->wpa_ie, &priv->wpa_ie,
MAX_WPA_IE_LEN);
assoc_req->wpa_ie_len = priv->wpa_ie_len;
}
lbs_deb_leave(LBS_DEB_ASSOC);
return assoc_req;
}
/**
* @brief Deauthenticate from a specific BSS
*
* @param priv A pointer to struct lbs_private structure
* @param bssid The specific BSS to deauthenticate from
* @param reason The 802.11 sec. 7.3.1.7 Reason Code for deauthenticating
*
* @return 0 on success, error on failure
*/
int lbs_cmd_80211_deauthenticate(struct lbs_private *priv, u8 bssid[ETH_ALEN],
u16 reason)
{
struct cmd_ds_802_11_deauthenticate cmd;
int ret;
lbs_deb_enter(LBS_DEB_JOIN);
memset(&cmd, 0, sizeof(cmd));
cmd.hdr.size = cpu_to_le16(sizeof(cmd));
memcpy(cmd.macaddr, &bssid[0], ETH_ALEN);
cmd.reasoncode = cpu_to_le16(reason);
ret = lbs_cmd_with_response(priv, CMD_802_11_DEAUTHENTICATE, &cmd);
/* Clean up everything even if there was an error; can't assume that
* we're still authenticated to the AP after trying to deauth.
*/
lbs_mac_event_disconnected(priv);
lbs_deb_leave(LBS_DEB_JOIN);
return ret;
}
Reference in New Issue View Git Blame Copy Permalink