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libertas: move association code from scan.c into assoc.c

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Besides code moving, I did the following changes:

* made some functions static
* removed some unneeded #include's
* made patch checkpatch.pl clean

Signed-off-by: Holger Schurig <hs4233@mail.mn-solutions.de>
Acked-by: Dan Williams <dcbw@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Holger Schurig 2008-04-02 16:27:42 +02:00 committed by John W. Linville
parent 697900ac14
commit 245bf20f9c
6 changed files with 397 additions and 424 deletions
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352
drivers/net/wireless/libertas/assoc.c
View file

@ -5,6 +5,7 @@
#include "assoc.h"
#include "decl.h"
#include "host.h"
#include "scan.h"
#include "cmd.h"
@ -170,6 +171,272 @@ int lbs_stop_adhoc_network(struct lbs_private *priv)
0, CMD_OPTION_WAITFORRSP, 0, NULL);
}
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] != MFIE_TYPE_GENERIC
&& match_bss->rsn_ie[0] != MFIE_TYPE_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] == MFIE_TYPE_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] == MFIE_TYPE_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] != MFIE_TYPE_GENERIC)
&& (match_bss->rsn_ie[0] != MFIE_TYPE_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)
{
@ -617,6 +884,91 @@ static int should_stop_adhoc(struct lbs_private *priv,
}
/**
* @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,

41
drivers/net/wireless/libertas/dev.h
View file

@ -10,9 +10,10 @@
#include <linux/wireless.h>
#include <linux/ethtool.h>
#include <linux/debugfs.h>
#include <net/ieee80211.h>
#include "defs.h"
#include "scan.h"
#include "hostcmd.h"
extern struct ethtool_ops lbs_ethtool_ops;
@ -325,6 +326,44 @@ struct lbs_private {
extern struct cmd_confirm_sleep confirm_sleep;
/**
* @brief Structure used to store information for each beacon/probe response
*/
struct bss_descriptor {
u8 bssid[ETH_ALEN];
u8 ssid[IW_ESSID_MAX_SIZE + 1];
u8 ssid_len;
u16 capability;
u32 rssi;
u32 channel;
u16 beaconperiod;
u32 atimwindow;
/* IW_MODE_AUTO, IW_MODE_ADHOC, IW_MODE_INFRA */
u8 mode;
/* zero-terminated array of supported data rates */
u8 rates[MAX_RATES + 1];
unsigned long last_scanned;
union ieeetypes_phyparamset phyparamset;
union IEEEtypes_ssparamset ssparamset;
struct ieeetypes_countryinfofullset countryinfo;
u8 wpa_ie[MAX_WPA_IE_LEN];
size_t wpa_ie_len;
u8 rsn_ie[MAX_WPA_IE_LEN];
size_t rsn_ie_len;
u8 mesh;
struct list_head list;
};
/** Association request
*
* Encapsulates all the options that describe a specific assocation request

1
drivers/net/wireless/libertas/main.c
View file

@ -19,6 +19,7 @@
#include "dev.h"
#include "wext.h"
#include "debugfs.h"
#include "scan.h"
#include "assoc.h"
#include "cmd.h"

364
drivers/net/wireless/libertas/scan.c
View file

@ -4,22 +4,13 @@
* IOCTL handlers as well as command preperation and response routines
* for sending scan commands to the firmware.
*/
#include <linux/ctype.h>
#include <linux/if.h>
#include <linux/netdevice.h>
#include <linux/wireless.h>
#include <linux/etherdevice.h>
#include <net/ieee80211.h>
#include <net/iw_handler.h>
#include <asm/unaligned.h>
#include "host.h"
#include "decl.h"
#include "dev.h"
#include "scan.h"
#include "assoc.h"
#include "cmd.h"
//! Approximate amount of data needed to pass a scan result back to iwlist
@ -110,69 +101,6 @@ int lbs_ssid_cmp(uint8_t *ssid1, uint8_t ssid1_len, uint8_t *ssid2,
return memcmp(ssid1, ssid2, ssid1_len);
}
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] != MFIE_TYPE_GENERIC
&& match_bss->rsn_ie[0] != MFIE_TYPE_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] == MFIE_TYPE_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] == MFIE_TYPE_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] != MFIE_TYPE_GENERIC)
&& (match_bss->rsn_ie[0] != MFIE_TYPE_RSN)
&& (match_bss->capability & WLAN_CAPABILITY_PRIVACY))
return 1;
else
return 0;
}
static inline int is_same_network(struct bss_descriptor *src,
struct bss_descriptor *dst)
{
@ -185,78 +113,6 @@ static inline int is_same_network(struct bss_descriptor *src,
!memcmp(src->ssid, dst->ssid, src->ssid_len));
}
/**
* @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;
if ((matched = match_bss_no_security(&priv->secinfo, bss))) {
goto done;
} else if ((matched = match_bss_static_wep(&priv->secinfo, bss))) {
goto done;
} else if ((matched = match_bss_wpa(&priv->secinfo, bss))) {
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;
} else if ((matched = match_bss_wpa2(&priv->secinfo, bss))) {
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;
} else if ((matched = match_bss_dynamic_wep(&priv->secinfo, bss))) {
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;
}
@ -341,7 +197,6 @@ static int lbs_scan_create_channel_list(struct lbs_private *priv,
return chanidx;
}
/*
* Add SSID TLV of the form:
*
@ -359,7 +214,6 @@ static int lbs_scan_add_ssid_tlv(struct lbs_private *priv, u8 *tlv)
return sizeof(ssid_tlv->header) + priv->scan_ssid_len;
}
/*
* Add CHANLIST TLV of the form
*
@ -398,7 +252,6 @@ static int lbs_scan_add_chanlist_tlv(uint8_t *tlv,
return sizeof(chan_tlv->header) + size;
}
/*
* Add RATES TLV of the form
*
@ -433,7 +286,6 @@ static int lbs_scan_add_rates_tlv(uint8_t *tlv)
return sizeof(rate_tlv->header) + i;
}
/*
* Generate the CMD_802_11_SCAN command with the proper tlv
* for a bunch of channels.
@ -482,12 +334,9 @@ out:
return ret;
}
/**
* @brief Internal function used to start a scan based on an input config
*
* Also used from debugfs
*
* Use the input user scan configuration information when provided in
* order to send the appropriate scan commands to firmware to populate or
* update the internal driver scan table
@ -497,7 +346,7 @@ out:
*
* @return 0 or < 0 if error
*/
static int lbs_scan_networks(struct lbs_private *priv, int full_scan)
int lbs_scan_networks(struct lbs_private *priv, int full_scan)
{
int ret = -ENOMEM;
struct chanscanparamset *chan_list;
@ -627,9 +476,6 @@ out:
return ret;
}
void lbs_scan_worker(struct work_struct *work)
{
struct lbs_private *priv =
@ -880,214 +726,6 @@ done:
return ret;
}
/**
* @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)
*/
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
*/
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;
}
/**
* @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
*/
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;
}
/**
* @brief Send a scan command for all available channels filtered on a spec
*

62
drivers/net/wireless/libertas/scan.h
View file

@ -7,73 +7,13 @@
#ifndef _LBS_SCAN_H
#define _LBS_SCAN_H
#include <net/ieee80211.h>
#include "hostcmd.h"
/**
* @brief Maximum number of channels that can be sent in a setuserscan ioctl
*/
#define LBS_IOCTL_USER_SCAN_CHAN_MAX 50
//! Infrastructure BSS scan type in cmd_ds_802_11_scan
#define LBS_SCAN_BSS_TYPE_BSS 1
//! Adhoc BSS scan type in cmd_ds_802_11_scan
#define LBS_SCAN_BSS_TYPE_IBSS 2
//! Adhoc or Infrastructure BSS scan type in cmd_ds_802_11_scan, no filter
#define LBS_SCAN_BSS_TYPE_ANY 3
/**
* @brief Structure used to store information for each beacon/probe response
*/
struct bss_descriptor {
u8 bssid[ETH_ALEN];
u8 ssid[IW_ESSID_MAX_SIZE + 1];
u8 ssid_len;
u16 capability;
u32 rssi;
u32 channel;
u16 beaconperiod;
u32 atimwindow;
/* IW_MODE_AUTO, IW_MODE_ADHOC, IW_MODE_INFRA */
u8 mode;
/* zero-terminated array of supported data rates */
u8 rates[MAX_RATES + 1];
unsigned long last_scanned;
union ieeetypes_phyparamset phyparamset;
union IEEEtypes_ssparamset ssparamset;
struct ieeetypes_countryinfofullset countryinfo;
u8 wpa_ie[MAX_WPA_IE_LEN];
size_t wpa_ie_len;
u8 rsn_ie[MAX_WPA_IE_LEN];
size_t rsn_ie_len;
u8 mesh;
struct list_head list;
};
int lbs_ssid_cmp(u8 *ssid1, u8 ssid1_len, u8 *ssid2, u8 ssid2_len);
struct bss_descriptor *lbs_find_ssid_in_list(struct lbs_private *priv,
u8 *ssid, u8 ssid_len, u8 *bssid, u8 mode,
int channel);
struct bss_descriptor *lbs_find_bssid_in_list(struct lbs_private *priv,
u8 *bssid, u8 mode);
int lbs_find_best_network_ssid(struct lbs_private *priv, u8 *out_ssid,
u8 *out_ssid_len, u8 preferred_mode, u8 *out_mode);
int lbs_send_specific_ssid_scan(struct lbs_private *priv, u8 *ssid,
u8 ssid_len);
@ -82,6 +22,8 @@ int lbs_get_scan(struct net_device *dev, struct iw_request_info *info,
int lbs_set_scan(struct net_device *dev, struct iw_request_info *info,
union iwreq_data *wrqu, char *extra);
int lbs_scan_networks(struct lbs_private *priv, int full_scan);
void lbs_scan_worker(struct work_struct *work);
#endif

1
drivers/net/wireless/libertas/wext.c
View file

@ -17,6 +17,7 @@
#include "defs.h"
#include "dev.h"
#include "wext.h"
#include "scan.h"
#include "assoc.h"
#include "cmd.h"