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Commit ffd074fc authored by Holger Schurig's avatar Holger Schurig Committed by David S. Miller
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libertas: implement new scanning logic 

This changes the code that is used for scanning and makes it hopefully
easier to understand:

* move function into logical blocks
* create a bunch of lbs_scan_add_XXXX_tlv() functions, that
  help to create the TLV parameter of CMD_802_11_SCAN
* all of them are now called from the much simpler lbs_do_scan()
* no **puserscancfg double-pointers :-)
Signed-off-by: default avatarHolger Schurig <hs4233@mail.mn-solutions.de>
Acked-by: default avatarDan Williams <dcbw@redhat.com>
Signed-off-by: default avatarDavid Woodhouse <dwmw2@infradead.org>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 83eacf23
Hide whitespace changes
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Showing with 361 additions and 513 deletions
drivers/net/wireless/libertas/dev.h
View file @ ffd074fc
......@@ -366,9 +366,8 @@ struct lbs_adapter {
struct cmd_ds_802_11_get_log logmsg;
u32 monitormode;
int last_scanned_channel;
u8 fw_ready;
u8 last_scanned_channel;
};
#endif
drivers/net/wireless/libertas/scan.c
View file @ ffd074fc
......@@ -79,6 +79,22 @@ static inline void clear_bss_descriptor (struct bss_descriptor * bss)
memset(bss, 0, offsetof(struct bss_descriptor, list));
}
/**
* @brief Compare two SSIDs
*
* @param ssid1 A pointer to ssid to compare
* @param ssid2 A pointer to ssid to compare
*
* @return 0: ssid is same, otherwise is different
*/
int lbs_ssid_cmp(u8 *ssid1, u8 ssid1_len, u8 *ssid2, u8 ssid2_len)
{
if (ssid1_len != ssid2_len)
return -1;
return memcmp(ssid1, ssid2, ssid1_len);
}
static inline int match_bss_no_security(struct lbs_802_11_security *secinfo,
struct bss_descriptor * match_bss)
{
......@@ -149,6 +165,18 @@ static inline int match_bss_dynamic_wep(struct lbs_802_11_security *secinfo,
return 0;
}
static inline int is_same_network(struct bss_descriptor *src,
struct bss_descriptor *dst)
{
/* A network is only a duplicate if the channel, BSSID, and ESSID
* all match. We treat all <hidden> with the same BSSID and channel
* as one network */
return ((src->ssid_len == dst->ssid_len) &&
(src->channel == dst->channel) &&
!compare_ether_addr(src->bssid, dst->bssid) &&
!memcmp(src->ssid, dst->ssid, src->ssid_len));
}
/**
* @brief Check if a scanned network compatible with the driver settings
*
......@@ -184,9 +212,9 @@ static int is_network_compatible(struct lbs_adapter *adapter,
goto done;
} else if ((matched = match_bss_wpa(&adapter->secinfo, bss))) {
lbs_deb_scan(
"is_network_compatible() WPA: wpa_ie=%#x "
"wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s "
"privacy=%#x\n", bss->wpa_ie[0], bss->rsn_ie[0],
"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],
adapter->secinfo.wep_enabled ? "e" : "d",
adapter->secinfo.WPAenabled ? "e" : "d",
adapter->secinfo.WPA2enabled ? "e" : "d",
......@@ -194,9 +222,9 @@ static int is_network_compatible(struct lbs_adapter *adapter,
goto done;
} else if ((matched = match_bss_wpa2(&adapter->secinfo, bss))) {
lbs_deb_scan(
"is_network_compatible() WPA2: wpa_ie=%#x "
"wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s "
"privacy=%#x\n", bss->wpa_ie[0], bss->rsn_ie[0],
"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],
adapter->secinfo.wep_enabled ? "e" : "d",
adapter->secinfo.WPAenabled ? "e" : "d",
adapter->secinfo.WPA2enabled ? "e" : "d",
......@@ -205,7 +233,7 @@ static int is_network_compatible(struct lbs_adapter *adapter,
} else if ((matched = match_bss_dynamic_wep(&adapter->secinfo, bss))) {
lbs_deb_scan(
"is_network_compatible() dynamic WEP: "
"wpa_ie=%#x wpa2_ie=%#x privacy=%#x\n",
"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;
......@@ -213,8 +241,8 @@ static int is_network_compatible(struct lbs_adapter *adapter,
/* bss security settings don't match those configured on card */
lbs_deb_scan(
"is_network_compatible() FAILED: wpa_ie=%#x "
"wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s privacy=%#x\n",
"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],
adapter->secinfo.wep_enabled ? "e" : "d",
adapter->secinfo.WPAenabled ? "e" : "d",
......@@ -226,22 +254,6 @@ static int is_network_compatible(struct lbs_adapter *adapter,
return matched;
}
/**
* @brief Compare two SSIDs
*
* @param ssid1 A pointer to ssid to compare
* @param ssid2 A pointer to ssid to compare
*
* @return 0--ssid is same, otherwise is different
*/
int lbs_ssid_cmp(u8 *ssid1, u8 ssid1_len, u8 *ssid2, u8 ssid2_len)
{
if (ssid1_len != ssid2_len)
return -1;
return memcmp(ssid1, ssid2, ssid1_len);
}
......@@ -251,6 +263,16 @@ int lbs_ssid_cmp(u8 *ssid1, u8 ssid1_len, u8 *ssid2, u8 ssid2_len)
/* */
/*********************************************************************/
void lbs_scan_worker(struct work_struct *work)
{
struct lbs_private *priv =
container_of(work, struct lbs_private, scan_work.work);
lbs_deb_enter(LBS_DEB_SCAN);
lbs_scan_networks(priv, NULL, 0);
lbs_deb_leave(LBS_DEB_SCAN);
}
/**
* @brief Create a channel list for the driver to scan based on region info
......@@ -271,7 +293,7 @@ int lbs_ssid_cmp(u8 *ssid1, u8 ssid1_len, u8 *ssid2, u8 ssid2_len)
*
* @return void
*/
static void lbs_scan_create_channel_list(struct lbs_private *priv,
static int lbs_scan_create_channel_list(struct lbs_private *priv,
struct chanscanparamset * scanchanlist,
u8 filteredscan)
{
......@@ -284,8 +306,6 @@ static void lbs_scan_create_channel_list(struct lbs_private *priv,
int nextchan;
u8 scantype;
lbs_deb_enter_args(LBS_DEB_SCAN, "filteredscan %d", filteredscan);
chanidx = 0;
/* Set the default scan type to the user specified type, will later
......@@ -353,383 +373,151 @@ static void lbs_scan_create_channel_list(struct lbs_private *priv,
}
}
}
return chanidx;
}
/* Delayed partial scan worker */
void lbs_scan_worker(struct work_struct *work)
/*
* Add SSID TLV of the form:
*
* TLV-ID SSID 00 00
* length 06 00
* ssid 4d 4e 54 45 53 54
*/
static int lbs_scan_add_ssid_tlv(u8 *tlv,
const struct lbs_ioctl_user_scan_cfg *user_cfg)
{
struct lbs_private *priv = container_of(work,
struct lbs_private,
scan_work.work);
lbs_scan_networks(priv, NULL, 0);
struct mrvlietypes_ssidparamset *ssid_tlv =
(struct mrvlietypes_ssidparamset *)tlv;
ssid_tlv->header.type = cpu_to_le16(TLV_TYPE_SSID);
ssid_tlv->header.len = cpu_to_le16(user_cfg->ssid_len);
memcpy(ssid_tlv->ssid, user_cfg->ssid, user_cfg->ssid_len);
return sizeof(ssid_tlv->header) + user_cfg->ssid_len;
}
/**
* @brief Construct a lbs_scan_cmd_config structure to use in issue scan cmds
*
* Application layer or other functions can invoke lbs_scan_networks
* with a scan configuration supplied in a lbs_ioctl_user_scan_cfg struct.
* This structure is used as the basis of one or many lbs_scan_cmd_config
* commands that are sent to the command processing module and sent to
* firmware.
*
* Create a lbs_scan_cmd_config based on the following user supplied
* parameters (if present):
* - SSID filter
* - BSSID filter
* - Number of Probes to be sent
* - channel list
*
* If the SSID or BSSID filter is not present, disable/clear the filter.
* Qualify the channel
/*
* Add CHANLIST TLV of the form
*
* @param priv A pointer to struct lbs_private structure
* @param puserscanin NULL or pointer to scan configuration parameters
* @param ppchantlvout Output parameter: Pointer to the start of the
* channel TLV portion of the output scan config
* @param pscanchanlist Output parameter: Pointer to the resulting channel
* list to scan
* @param pmaxchanperscan Output parameter: Number of channels to scan for
* each issuance of the firmware scan command
* @param pfilteredscan Output parameter: Flag indicating whether or not
* a BSSID or SSID filter is being sent in the
* command to firmware. Used to increase the number
* of channels sent in a scan command and to
* disable the firmware channel scan filter.
* @param pscancurrentonly Output parameter: Flag indicating whether or not
* we are only scanning our current active channel
* TLV-ID CHANLIST 01 01
* length 5b 00
* channel 1 00 01 00 00 00 64 00
* radio type 00
* channel 01
* scan type 00
* min scan time 00 00
* max scan time 64 00
* channel 2 00 02 00 00 00 64 00
* channel 3 00 03 00 00 00 64 00
* channel 4 00 04 00 00 00 64 00
* channel 5 00 05 00 00 00 64 00
* channel 6 00 06 00 00 00 64 00
* channel 7 00 07 00 00 00 64 00
* channel 8 00 08 00 00 00 64 00
* channel 9 00 09 00 00 00 64 00
* channel 10 00 0a 00 00 00 64 00
* channel 11 00 0b 00 00 00 64 00
* channel 12 00 0c 00 00 00 64 00
* channel 13 00 0d 00 00 00 64 00
*
* @return resulting scan configuration
*/
static struct lbs_scan_cmd_config *
lbs_scan_setup_scan_config(struct lbs_private *priv,
const struct lbs_ioctl_user_scan_cfg *puserscanin,
struct mrvlietypes_chanlistparamset ** ppchantlvout,
struct chanscanparamset * pscanchanlist,
int *pmaxchanperscan,
u8 * pfilteredscan,
u8 * pscancurrentonly)
static int lbs_scan_add_chanlist_tlv(u8 *tlv,
struct chanscanparamset *chan_list,
int chan_count)
{
struct mrvlietypes_ssidparamset *pssidtlv;
struct lbs_scan_cmd_config *pscancfgout = NULL;
u8 *ptlvpos;
lbs_deb_enter(LBS_DEB_SCAN);
pscancfgout = kzalloc(MAX_SCAN_CFG_ALLOC, GFP_KERNEL);
if (pscancfgout == NULL)
goto out;
/* The tlvbufferlen is calculated for each scan command. The TLVs added
* in this routine will be preserved since the routine that sends
* the command will append channelTLVs at *ppchantlvout. The difference
* between the *ppchantlvout and the tlvbuffer start will be used
* to calculate the size of anything we add in this routine.
*/
pscancfgout->tlvbufferlen = 0;
/* Running tlv pointer. Assigned to ppchantlvout at end of function
* so later routines know where channels can be added to the command buf
*/
ptlvpos = pscancfgout->tlvbuffer;
/*
* Set the initial scan paramters for progressive scanning. If a specific
* BSSID or SSID is used, the number of channels in the scan command
* will be increased to the absolute maximum
*/
*pmaxchanperscan = MRVDRV_CHANNELS_PER_SCAN_CMD;
/* Initialize the scan as un-filtered by firmware, set to TRUE below if
* a SSID or BSSID filter is sent in the command
*/
*pfilteredscan = 0;
/* Initialize the scan as not being only on the current channel. If
* the channel list is customized, only contains one channel, and
* is the active channel, this is set true and data flow is not halted.
*/
*pscancurrentonly = 0;
if (puserscanin) {
/* Set the bss type scan filter, use adapter setting if unset */
pscancfgout->bsstype =
puserscanin->bsstype ? puserscanin->bsstype : CMD_BSS_TYPE_ANY;
/*
* Set the BSSID filter to the incoming configuration,
* if non-zero. If not set, it will remain disabled (all zeros).
*/
memcpy(pscancfgout->bssid, puserscanin->bssid,
sizeof(pscancfgout->bssid));
if (puserscanin->ssid_len) {
pssidtlv =
(struct mrvlietypes_ssidparamset *) pscancfgout->
tlvbuffer;
pssidtlv->header.type = cpu_to_le16(TLV_TYPE_SSID);
pssidtlv->header.len = cpu_to_le16(puserscanin->ssid_len);
memcpy(pssidtlv->ssid, puserscanin->ssid,
puserscanin->ssid_len);
ptlvpos += sizeof(pssidtlv->header) + puserscanin->ssid_len;
}
/*
* The default number of channels sent in the command is low to
* ensure the response buffer from the firmware does not truncate
* scan results. That is not an issue with an SSID or BSSID
* filter applied to the scan results in the firmware.
*/
if ( puserscanin->ssid_len
|| (compare_ether_addr(pscancfgout->bssid, &zeromac[0]) != 0)) {
*pmaxchanperscan = MRVDRV_MAX_CHANNELS_PER_SCAN;
*pfilteredscan = 1;
}
} else {
pscancfgout->bsstype = CMD_BSS_TYPE_ANY;
}
/*
* Set the output for the channel TLV to the address in the tlv buffer
* past any TLVs that were added in this fuction (SSID).
* channel TLVs will be added past this for each scan command, preserving
* the TLVs that were previously added.
*/
*ppchantlvout = (struct mrvlietypes_chanlistparamset *) ptlvpos;
lbs_scan_create_channel_list(priv, pscanchanlist,
*pfilteredscan);
out:
return pscancfgout;
size_t size = sizeof(struct chanscanparamset) * chan_count;
struct mrvlietypes_chanlistparamset *chan_tlv =
(struct mrvlietypes_chanlistparamset *) tlv;
chan_tlv->header.type = cpu_to_le16(TLV_TYPE_CHANLIST);
memcpy(chan_tlv->chanscanparam, chan_list, size);
chan_tlv->header.len = cpu_to_le16(size);
return sizeof(chan_tlv->header) + size;
}
/**
* @brief Construct and send multiple scan config commands to the firmware
*
* Only used from lbs_scan_networks()
*
* Previous routines have created a lbs_scan_cmd_config with any requested
* TLVs. This function splits the channel TLV into maxchanperscan lists
* and sends the portion of the channel TLV along with the other TLVs
* to the lbs_cmd routines for execution in the firmware.
/*
* Add RATES TLV of the form
*
* @param priv A pointer to struct lbs_private structure
* @param maxchanperscan Maximum number channels to be included in each
* scan command sent to firmware
* @param filteredscan Flag indicating whether or not a BSSID or SSID
* filter is being used for the firmware command
* scan command sent to firmware
* @param pscancfgout Scan configuration used for this scan.
* @param pchantlvout Pointer in the pscancfgout where the channel TLV
* should start. This is past any other TLVs that
* must be sent down in each firmware command.
* @param pscanchanlist List of channels to scan in maxchanperscan segments
* TLV-ID RATES 01 00
* length 0e 00
* rates 82 84 8b 96 0c 12 18 24 30 48 60 6c
*
* @return 0 or error return otherwise
* The rates are in lbs_bg_rates[], but for the 802.11b
* rates the high bit isn't set.
*/
static int lbs_scan_channel_list(struct lbs_private *priv,
int maxchanperscan,
u8 filteredscan,
struct lbs_scan_cmd_config *pscancfgout,
struct mrvlietypes_chanlistparamset * pchantlvout,
struct chanscanparamset * pscanchanlist,
const struct lbs_ioctl_user_scan_cfg *puserscanin,
int full_scan)
static int lbs_scan_add_rates_tlv(u8 *tlv)
{
struct chanscanparamset *ptmpchan;
struct chanscanparamset *pstartchan;
u8 scanband;
int doneearly;
int tlvidx;
int ret = 0;
int scanned = 0;
union iwreq_data wrqu;
lbs_deb_enter_args(LBS_DEB_SCAN, "maxchanperscan %d, filteredscan %d, "
"full_scan %d", maxchanperscan, filteredscan, full_scan);
if (!pscancfgout || !pchantlvout || !pscanchanlist) {
lbs_deb_scan("pscancfgout, pchantlvout or "
"pscanchanlist is NULL\n");
ret = -1;
goto out;
}
pchantlvout->header.type = cpu_to_le16(TLV_TYPE_CHANLIST);
/* Set the temp channel struct pointer to the start of the desired list */
ptmpchan = pscanchanlist;
if (priv->adapter->last_scanned_channel && !puserscanin)
ptmpchan += priv->adapter->last_scanned_channel;
/* Loop through the desired channel list, sending a new firmware scan
* commands for each maxchanperscan channels (or for 1,6,11 individually
* if configured accordingly)
*/
while (ptmpchan->channumber) {
tlvidx = 0;
pchantlvout->header.len = 0;
scanband = ptmpchan->radiotype;
pstartchan = ptmpchan;
doneearly = 0;
/* Construct the channel TLV for the scan command. Continue to
* insert channel TLVs until:
* - the tlvidx hits the maximum configured per scan command
* - the next channel to insert is 0 (end of desired channel list)
* - doneearly is set (controlling individual scanning of 1,6,11)
*/
while (tlvidx < maxchanperscan && ptmpchan->channumber
&& !doneearly && scanned < 2) {
lbs_deb_scan("channel %d, radio %d, passive %d, "
"dischanflt %d, maxscantime %d\n",
ptmpchan->channumber,
ptmpchan->radiotype,
ptmpchan->chanscanmode.passivescan,
ptmpchan->chanscanmode.disablechanfilt,
ptmpchan->maxscantime);
/* Copy the current channel TLV to the command being prepared */
memcpy(pchantlvout->chanscanparam + tlvidx,
ptmpchan, sizeof(pchantlvout->chanscanparam));
/* Increment the TLV header length by the size appended */
/* Ew, it would be _so_ nice if we could just declare the
variable little-endian and let GCC handle it for us */
pchantlvout->header.len =
cpu_to_le16(le16_to_cpu(pchantlvout->header.len) +
sizeof(pchantlvout->chanscanparam));
/*
* The tlv buffer length is set to the number of bytes of the
* between the channel tlv pointer and the start of the
* tlv buffer. This compensates for any TLVs that were appended
* before the channel list.
*/
pscancfgout->tlvbufferlen = ((u8 *) pchantlvout
- pscancfgout->tlvbuffer);
/* Add the size of the channel tlv header and the data length */
pscancfgout->tlvbufferlen +=
(sizeof(pchantlvout->header)
+ le16_to_cpu(pchantlvout->header.len));
/* Increment the index to the channel tlv we are constructing */
tlvidx++;
doneearly = 0;
/* Stop the loop if the *current* channel is in the 1,6,11 set
* and we are not filtering on a BSSID or SSID.
*/
if (!filteredscan && (ptmpchan->channumber == 1
|| ptmpchan->channumber == 6
|| ptmpchan->channumber == 11)) {
doneearly = 1;
}
/* Increment the tmp pointer to the next channel to be scanned */
ptmpchan++;
scanned++;
/* Stop the loop if the *next* channel is in the 1,6,11 set.
* This will cause it to be the only channel scanned on the next
* interation
*/
if (!filteredscan && (ptmpchan->channumber == 1
|| ptmpchan->channumber == 6
|| ptmpchan->channumber == 11)) {
doneearly = 1;
}
}
/* Send the scan command to the firmware with the specified cfg */
ret = lbs_prepare_and_send_command(priv, CMD_802_11_SCAN, 0,
0, 0, pscancfgout);
if (scanned >= 2 && !full_scan) {
ret = 0;
goto done;
}
scanned = 0;
}
done:
priv->adapter->last_scanned_channel = ptmpchan->channumber;
if (priv->adapter->last_scanned_channel) {
/* Schedule the next part of the partial scan */
if (!full_scan && !priv->adapter->surpriseremoved) {
cancel_delayed_work(&priv->scan_work);
queue_delayed_work(priv->work_thread, &priv->scan_work,
msecs_to_jiffies(300));
}
} else {
/* All done, tell userspace the scan table has been updated */
memset(&wrqu, 0, sizeof(union iwreq_data));
wireless_send_event(priv->dev, SIOCGIWSCAN, &wrqu, NULL);
int i;
struct mrvlietypes_ratesparamset *rate_tlv =
(struct mrvlietypes_ratesparamset *) tlv;
rate_tlv->header.type = cpu_to_le16(TLV_TYPE_RATES);
tlv += sizeof(rate_tlv->header);
for (i = 0; i < MAX_RATES; i++) {
*tlv = lbs_bg_rates[i];
if (*tlv == 0)
break;
/* This code makes sure that the 802.11b rates (1 MBit/s, 2
MBit/s, 5.5 MBit/s and 11 MBit/s get's the high bit set.
Note that the values are MBit/s * 2, to mark them as
basic rates so that the firmware likes it better */
if (*tlv == 0x02 || *tlv == 0x04 ||
*tlv == 0x0b || *tlv == 0x16)
*tlv |= 0x80;
tlv++;
}
out:
lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret);
return ret;
rate_tlv->header.len = cpu_to_le16(i);
return sizeof(rate_tlv->header) + i;
}
/*
* Only used from lbs_scan_networks()
*/
static void clear_selected_scan_list_entries(struct lbs_adapter *adapter,
const struct lbs_ioctl_user_scan_cfg *scan_cfg)
* Generate the CMD_802_11_SCAN command with the proper tlv
* for a bunch of channels.
*/
static int lbs_do_scan(struct lbs_private *priv,
u8 bsstype,
struct chanscanparamset *chan_list,
int chan_count,
const struct lbs_ioctl_user_scan_cfg *user_cfg)
{
struct bss_descriptor *bss;
struct bss_descriptor *safe;
u32 clear_ssid_flag = 0, clear_bssid_flag = 0;
int ret = -ENOMEM;
struct lbs_scan_cmd_config *scan_cmd;
u8 *tlv; /* pointer into our current, growing TLV storage area */
lbs_deb_enter(LBS_DEB_SCAN);
lbs_deb_enter_args(LBS_DEB_SCAN, "bsstype %d, chanlist[].chan %d, "
"chan_count %d",
bsstype, chan_list[0].channumber, chan_count);
if (!scan_cfg)
/* create the fixed part for scan command */
scan_cmd = kzalloc(MAX_SCAN_CFG_ALLOC, GFP_KERNEL);
if (scan_cmd == NULL)
goto out;
if (scan_cfg->clear_ssid && scan_cfg->ssid_len)
clear_ssid_flag = 1;
if (scan_cfg->clear_bssid
&& (compare_ether_addr(scan_cfg->bssid, &zeromac[0]) != 0)
&& (compare_ether_addr(scan_cfg->bssid, &bcastmac[0]) != 0)) {
clear_bssid_flag = 1;
}
if (!clear_ssid_flag && !clear_bssid_flag)
goto out;
mutex_lock(&adapter->lock);
list_for_each_entry_safe (bss, safe, &adapter->network_list, list) {
u32 clear = 0;
/* Check for an SSID match */
if ( clear_ssid_flag
&& (bss->ssid_len == scan_cfg->ssid_len)
&& !memcmp(bss->ssid, scan_cfg->ssid, bss->ssid_len))
clear = 1;
/* Check for a BSSID match */
if ( clear_bssid_flag
&& !compare_ether_addr(bss->bssid, scan_cfg->bssid))
clear = 1;
if (clear) {
list_move_tail (&bss->list, &adapter->network_free_list);
clear_bss_descriptor(bss);
}
}
mutex_unlock(&adapter->lock);
tlv = scan_cmd->tlvbuffer;
if (user_cfg)
memcpy(scan_cmd->bssid, user_cfg->bssid, ETH_ALEN);
scan_cmd->bsstype = bsstype;
/* add TLVs */
if (user_cfg && user_cfg->ssid_len)
tlv += lbs_scan_add_ssid_tlv(tlv, user_cfg);
if (chan_list && chan_count)
tlv += lbs_scan_add_chanlist_tlv(tlv, chan_list, chan_count);
tlv += lbs_scan_add_rates_tlv(tlv);
/* This is the final data we are about to send */
scan_cmd->tlvbufferlen = tlv - scan_cmd->tlvbuffer;
lbs_deb_hex(LBS_DEB_SCAN, "SCAN_CMD", (void *)scan_cmd, 1+6);
lbs_deb_hex(LBS_DEB_SCAN, "SCAN_TLV", scan_cmd->tlvbuffer,
scan_cmd->tlvbufferlen);
ret = lbs_prepare_and_send_command(priv, CMD_802_11_SCAN, 0,
CMD_OPTION_WAITFORRSP, 0, scan_cmd);
out:
lbs_deb_leave(LBS_DEB_SCAN);
kfree(scan_cmd);
lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret);
return ret;
}
......@@ -745,29 +533,30 @@ static void clear_selected_scan_list_entries(struct lbs_adapter *adapter,
* @param priv A pointer to struct lbs_private structure
* @param puserscanin Pointer to the input configuration for the requested
* scan.
* @param full_scan ???
*
* @return 0 or < 0 if error
*/
int lbs_scan_networks(struct lbs_private *priv,
const struct lbs_ioctl_user_scan_cfg *puserscanin,
const struct lbs_ioctl_user_scan_cfg *user_cfg,
int full_scan)
{
struct lbs_adapter *adapter = priv->adapter;
struct mrvlietypes_chanlistparamset *pchantlvout;
struct chanscanparamset * scan_chan_list = NULL;
struct lbs_scan_cmd_config *scan_cfg = NULL;
u8 filteredscan;
u8 scancurrentchanonly;
int maxchanperscan;
int ret;
int ret = -ENOMEM;
struct chanscanparamset *chan_list;
struct chanscanparamset *curr_chans;
int chan_count;
u8 bsstype = CMD_BSS_TYPE_ANY;
int numchannels = MRVDRV_CHANNELS_PER_SCAN_CMD;
int filteredscan = 0;
union iwreq_data wrqu;
#ifdef CONFIG_LIBERTAS_DEBUG
struct bss_descriptor * iter_bss;
struct bss_descriptor *iter;
int i = 0;
DECLARE_MAC_BUF(mac);
#endif
lbs_deb_enter_args(LBS_DEB_SCAN, "full_scan %d", full_scan);
lbs_deb_enter_args(LBS_DEB_SCAN, "full_scan %d",
full_scan);
/* Cancel any partial outstanding partial scans if this scan
* is a full scan.
......@@ -775,85 +564,130 @@ int lbs_scan_networks(struct lbs_private *priv,
if (full_scan && delayed_work_pending(&priv->scan_work))
cancel_delayed_work(&priv->scan_work);
scan_chan_list = kzalloc(sizeof(struct chanscanparamset) *
LBS_IOCTL_USER_SCAN_CHAN_MAX, GFP_KERNEL);
if (scan_chan_list == NULL) {
ret = -ENOMEM;
goto out;
/* Determine same scan parameters */
if (user_cfg) {
if (user_cfg->bsstype)
bsstype = user_cfg->bsstype;
if (compare_ether_addr(user_cfg->bssid, &zeromac[0]) != 0) {
numchannels = MRVDRV_MAX_CHANNELS_PER_SCAN;
filteredscan = 1;
}
}
lbs_deb_scan("numchannels %d, bsstype %d, "
"filteredscan %d\n",
numchannels, bsstype, filteredscan);
scan_cfg = lbs_scan_setup_scan_config(priv,
puserscanin,
&pchantlvout,
scan_chan_list,
&maxchanperscan,
&filteredscan,
&scancurrentchanonly);
if (scan_cfg == NULL) {
ret = -ENOMEM;
/* Create list of channels to scan */
chan_list = kzalloc(sizeof(struct chanscanparamset) *
LBS_IOCTL_USER_SCAN_CHAN_MAX, GFP_KERNEL);
if (!chan_list) {
lbs_pr_alert("SCAN: chan_list empty\n");
goto out;
}
clear_selected_scan_list_entries(adapter, puserscanin);
/* We want to scan all channels */
chan_count = lbs_scan_create_channel_list(priv, chan_list,
filteredscan);
/* Keep the data path active if we are only scanning our current channel */
if (!scancurrentchanonly) {
netif_stop_queue(priv->dev);
netif_carrier_off(priv->dev);
if (priv->mesh_dev) {
netif_stop_queue(priv->dev);
netif_carrier_off(priv->dev);
if (priv->mesh_dev) {
netif_stop_queue(priv->mesh_dev);
netif_carrier_off(priv->mesh_dev);
}
}
ret = lbs_scan_channel_list(priv,
maxchanperscan,
filteredscan,
scan_cfg,
pchantlvout,
scan_chan_list,
puserscanin,
full_scan);
/* Prepare to continue an interrupted scan */
lbs_deb_scan("chan_count %d, last_scanned_channel %d\n",
chan_count, adapter->last_scanned_channel);
curr_chans = chan_list;
/* advance channel list by already-scanned-channels */
if (adapter->last_scanned_channel > 0) {
curr_chans += adapter->last_scanned_channel;
chan_count -= adapter->last_scanned_channel;
}
/* Send scan command(s)
* numchannels contains the number of channels we should maximally scan
* chan_count is the total number of channels to scan
*/
while (chan_count) {
int to_scan = min(numchannels, chan_count);
lbs_deb_scan("scanning %d of %d channels\n",
to_scan, chan_count);
ret = lbs_do_scan(priv, bsstype, curr_chans,
to_scan, user_cfg);
if (ret) {
lbs_pr_err("SCAN_CMD failed\n");
goto out2;
}
curr_chans += to_scan;
chan_count -= to_scan;
/* somehow schedule the next part of the scan */
if (chan_count &&
!full_scan &&
!priv->adapter->surpriseremoved) {
/* -1 marks just that we're currently scanning */
if (adapter->last_scanned_channel < 0)
adapter->last_scanned_channel = to_scan;
else
adapter->last_scanned_channel += to_scan;
cancel_delayed_work(&priv->scan_work);
queue_delayed_work(priv->work_thread, &priv->scan_work,
msecs_to_jiffies(300));
/* skip over GIWSCAN event */
goto out;
}
}
memset(&wrqu, 0, sizeof(union iwreq_data));
wireless_send_event(priv->dev, SIOCGIWSCAN, &wrqu, NULL);
#ifdef CONFIG_LIBERTAS_DEBUG
/* Dump the scan table */
mutex_lock(&adapter->lock);
lbs_deb_scan("The scan table contains:\n");
list_for_each_entry (iter_bss, &adapter->network_list, list) {
lbs_deb_scan("scan %02d, %s, RSSI, %d, SSID '%s'\n",
i++, print_mac(mac, iter_bss->bssid), (s32) iter_bss->rssi,
escape_essid(iter_bss->ssid, iter_bss->ssid_len));
}
lbs_deb_scan("scan table:\n");
list_for_each_entry(iter, &adapter->network_list, list)
lbs_deb_scan("%02d: BSSID %s, RSSI %d, SSID '%s'\n",
i++, print_mac(mac, iter->bssid), (s32) iter->rssi,
escape_essid(iter->ssid, iter->ssid_len));
mutex_unlock(&adapter->lock);
#endif
out2:
adapter->last_scanned_channel = 0;
out:
if (adapter->connect_status == LBS_CONNECTED) {
netif_carrier_on(priv->dev);
netif_wake_queue(priv->dev);
}
if (priv->mesh_dev && (adapter->mesh_connect_status == LBS_CONNECTED)) {
netif_carrier_on(priv->mesh_dev);
netif_wake_queue(priv->mesh_dev);
}
out:
if (scan_cfg)
kfree(scan_cfg);
if (scan_chan_list)
kfree(scan_chan_list);
kfree(chan_list);
lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret);
return ret;
}
/*********************************************************************/
/* */
/* Result interpretation */
/* */
/*********************************************************************/
/**
* @brief Interpret a BSS scan response returned from the firmware
*
* Parse the various fixed fields and IEs passed back for a a BSS probe
* response or beacon from the scan command. Record information as needed
* in the scan table struct bss_descriptor for that entry.
* response or beacon from the scan command. Record information as needed
* in the scan table struct bss_descriptor for that entry.
*
* @param bss Output parameter: Pointer to the BSS Entry
*
......@@ -898,7 +732,7 @@ static int lbs_process_bss(struct bss_descriptor *bss,
*bytesleft -= beaconsize;
memcpy(bss->bssid, pos, ETH_ALEN);
lbs_deb_scan("process_bss: AP BSSID %s\n", print_mac(mac, bss->bssid));
lbs_deb_scan("process_bss: BSSID %s\n", print_mac(mac, bss->bssid));
pos += ETH_ALEN;
if ((end - pos) < 12) {
......@@ -914,7 +748,7 @@ static int lbs_process_bss(struct bss_descriptor *bss,
/* RSSI is 1 byte long */
bss->rssi = *pos;
lbs_deb_scan("process_bss: RSSI=%02X\n", *pos);
lbs_deb_scan("process_bss: RSSI %d\n", *pos);
pos++;
/* time stamp is 8 bytes long */
......@@ -926,18 +760,18 @@ static int lbs_process_bss(struct bss_descriptor *bss,
/* capability information is 2 bytes long */
bss->capability = le16_to_cpup((void *) pos);
lbs_deb_scan("process_bss: capabilities = 0x%4X\n", bss->capability);
lbs_deb_scan("process_bss: capabilities 0x%04x\n", bss->capability);
pos += 2;
if (bss->capability & WLAN_CAPABILITY_PRIVACY)
lbs_deb_scan("process_bss: AP WEP enabled\n");
lbs_deb_scan("process_bss: WEP enabled\n");
if (bss->capability & WLAN_CAPABILITY_IBSS)
bss->mode = IW_MODE_ADHOC;
else
bss->mode = IW_MODE_INFRA;
/* rest of the current buffer are IE's */
lbs_deb_scan("process_bss: IE length for this AP = %zd\n", end - pos);
lbs_deb_scan("process_bss: IE len %zd\n", end - pos);
lbs_deb_hex(LBS_DEB_SCAN, "process_bss: IE info", pos, end - pos);
/* process variable IE */
......@@ -955,7 +789,7 @@ static int lbs_process_bss(struct bss_descriptor *bss,
case MFIE_TYPE_SSID:
bss->ssid_len = elem->len;
memcpy(bss->ssid, elem->data, elem->len);
lbs_deb_scan("ssid '%s', ssid length %u\n",
lbs_deb_scan("got SSID IE: '%s', len %u\n",
escape_essid(bss->ssid, bss->ssid_len),
bss->ssid_len);
break;
......@@ -964,16 +798,14 @@ static int lbs_process_bss(struct bss_descriptor *bss,
n_basic_rates = min_t(u8, MAX_RATES, elem->len);
memcpy(bss->rates, elem->data, n_basic_rates);
got_basic_rates = 1;
lbs_deb_scan("got RATES IE\n");
break;
case MFIE_TYPE_FH_SET:
pFH = (struct ieeetypes_fhparamset *) pos;
memmove(&bss->phyparamset.fhparamset, pFH,
sizeof(struct ieeetypes_fhparamset));
#if 0 /* I think we can store these LE */
bss->phyparamset.fhparamset.dwelltime
= le16_to_cpu(bss->phyparamset.fhparamset.dwelltime);
#endif
lbs_deb_scan("got FH IE\n");
break;
case MFIE_TYPE_DS_SET:
......@@ -981,12 +813,14 @@ static int lbs_process_bss(struct bss_descriptor *bss,
bss->channel = pDS->currentchan;
memcpy(&bss->phyparamset.dsparamset, pDS,
sizeof(struct ieeetypes_dsparamset));
lbs_deb_scan("got DS IE, channel %d\n", bss->channel);
break;
case MFIE_TYPE_CF_SET:
pCF = (struct ieeetypes_cfparamset *) pos;
memcpy(&bss->ssparamset.cfparamset, pCF,
sizeof(struct ieeetypes_cfparamset));
lbs_deb_scan("got CF IE\n");
break;
case MFIE_TYPE_IBSS_SET:
......@@ -994,18 +828,16 @@ static int lbs_process_bss(struct bss_descriptor *bss,
bss->atimwindow = le32_to_cpu(pibss->atimwindow);
memmove(&bss->ssparamset.ibssparamset, pibss,
sizeof(struct ieeetypes_ibssparamset));
#if 0
bss->ssparamset.ibssparamset.atimwindow
= le16_to_cpu(bss->ssparamset.ibssparamset.atimwindow);
#endif
lbs_deb_scan("got IBSS IE\n");
break;
case MFIE_TYPE_COUNTRY:
pcountryinfo = (struct ieeetypes_countryinfoset *) pos;
lbs_deb_scan("got COUNTRY IE\n");
if (pcountryinfo->len < sizeof(pcountryinfo->countrycode)
|| pcountryinfo->len > 254) {
lbs_deb_scan("process_bss: 11D- Err "
"CountryInfo len =%d min=%zd max=254\n",
"CountryInfo len %d, min %zd, max 254\n",
pcountryinfo->len,
sizeof(pcountryinfo->countrycode));
ret = -1;
......@@ -1024,8 +856,11 @@ static int lbs_process_bss(struct bss_descriptor *bss,
* already found. Data rate IE should come before
* extended supported rate IE
*/
if (!got_basic_rates)
lbs_deb_scan("got RATESEX IE\n");
if (!got_basic_rates) {
lbs_deb_scan("... but ignoring it\n");
break;
}
n_ex_rates = elem->len;
if (n_basic_rates + n_ex_rates > MAX_RATES)
......@@ -1044,24 +879,36 @@ static int lbs_process_bss(struct bss_descriptor *bss,
bss->wpa_ie_len = min(elem->len + 2,
MAX_WPA_IE_LEN);
memcpy(bss->wpa_ie, elem, bss->wpa_ie_len);
lbs_deb_hex(LBS_DEB_SCAN, "process_bss: WPA IE", bss->wpa_ie,
lbs_deb_scan("got WPA IE\n");
lbs_deb_hex(LBS_DEB_SCAN, "WPA IE", bss->wpa_ie,
elem->len);
} else if (elem->len >= MARVELL_MESH_IE_LENGTH &&
elem->data[0] == 0x00 &&
elem->data[1] == 0x50 &&
elem->data[2] == 0x43 &&
elem->data[3] == 0x04) {
lbs_deb_scan("got mesh IE\n");
bss->mesh = 1;
} else {
lbs_deb_scan("got generiec IE: "
"%02x:%02x:%02x:%02x, len %d\n",
elem->data[0], elem->data[1],
elem->data[2], elem->data[3],
elem->len);
}
break;
case MFIE_TYPE_RSN:
lbs_deb_scan("got RSN IE\n");
bss->rsn_ie_len = min(elem->len + 2, MAX_WPA_IE_LEN);
memcpy(bss->rsn_ie, elem, bss->rsn_ie_len);
lbs_deb_hex(LBS_DEB_SCAN, "process_bss: RSN_IE", bss->rsn_ie, elem->len);
lbs_deb_hex(LBS_DEB_SCAN, "process_bss: RSN_IE",
bss->rsn_ie, elem->len);
break;
default:
lbs_deb_scan("got IE 0x%04x, len %d\n",
elem->id, elem->len);
break;
}
......@@ -1273,8 +1120,6 @@ int lbs_find_best_network_ssid(struct lbs_private *priv,
if (adapter->surpriseremoved)
goto out;
wait_event_interruptible(adapter->cmd_pending, !adapter->nr_cmd_pending);
found = lbs_find_best_ssid_in_list(adapter, preferred_mode);
if (found && (found->ssid_len > 0)) {
memcpy(out_ssid, &found->ssid, IW_ESSID_MAX_SIZE);
......@@ -1288,36 +1133,6 @@ int lbs_find_best_network_ssid(struct lbs_private *priv,
return ret;
}
/**
* @brief Scan Network
*
* @param dev A pointer to net_device structure
* @param info A pointer to iw_request_info structure
* @param vwrq A pointer to iw_param structure
* @param extra A pointer to extra data buf
*
* @return 0 --success, otherwise fail
*/
int lbs_set_scan(struct net_device *dev, struct iw_request_info *info,
struct iw_param *vwrq, char *extra)
{
struct lbs_private *priv = dev->priv;
struct lbs_adapter *adapter = priv->adapter;
lbs_deb_enter(LBS_DEB_SCAN);
if (!delayed_work_pending(&priv->scan_work)) {
queue_delayed_work(priv->work_thread, &priv->scan_work,
msecs_to_jiffies(50));
}
if (adapter->surpriseremoved)
return -1;
lbs_deb_leave(LBS_DEB_SCAN);
return 0;
}
/**
* @brief Send a scan command for all available channels filtered on a spec
......@@ -1329,8 +1144,6 @@ int lbs_set_scan(struct net_device *dev, struct iw_request_info *info,
* @param ssid_len Length of the SSID
* @param clear_ssid Should existing scan results with this SSID
* be cleared?
* @param prequestedssid A pointer to AP's ssid
* @param keeppreviousscan Flag used to save/clear scan table before scan
*
* @return 0-success, otherwise fail
*/
......@@ -1357,7 +1170,6 @@ int lbs_send_specific_ssid_scan(struct lbs_private *priv,
ret = -1;
goto out;
}
wait_event_interruptible(adapter->cmd_pending, !adapter->nr_cmd_pending);
out:
lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret);
......@@ -1373,6 +1185,7 @@ int lbs_send_specific_ssid_scan(struct lbs_private *priv,
/* */
/*********************************************************************/
#define MAX_CUSTOM_LEN 64
static inline char *lbs_translate_scan(struct lbs_private *priv,
......@@ -1398,7 +1211,7 @@ static inline char *lbs_translate_scan(struct lbs_private *priv,
goto out;
}
/* First entry *MUST* be the AP BSSID */
/* First entry *MUST* be the BSSID */
iwe.cmd = SIOCGIWAP;
iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
memcpy(iwe.u.ap_addr.sa_data, &bss->bssid, ETH_ALEN);
......@@ -1528,6 +1341,55 @@ static inline char *lbs_translate_scan(struct lbs_private *priv,
return start;
}
/**
* @brief Handle Scan Network ioctl
*
* @param dev A pointer to net_device structure
* @param info A pointer to iw_request_info structure
* @param vwrq A pointer to iw_param structure
* @param extra A pointer to extra data buf
*
* @return 0 --success, otherwise fail
*/
int lbs_set_scan(struct net_device *dev, struct iw_request_info *info,
struct iw_param *wrqu, char *extra)
{
struct lbs_private *priv = dev->priv;
struct lbs_adapter *adapter = priv->adapter;
lbs_deb_enter(LBS_DEB_SCAN);
if (!netif_running(dev))
return -ENETDOWN;
/* mac80211 does this:
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
if (sdata->type != IEEE80211_IF_TYPE_xxx)
return -EOPNOTSUPP;
if (wrqu->data.length == sizeof(struct iw_scan_req) &&
wrqu->data.flags & IW_SCAN_THIS_ESSID) {
req = (struct iw_scan_req *)extra;
ssid = req->essid;
ssid_len = req->essid_len;
}
*/
if (!delayed_work_pending(&priv->scan_work))
queue_delayed_work(priv->work_thread, &priv->scan_work,
msecs_to_jiffies(50));
/* set marker that currently a scan is taking place */
adapter->last_scanned_channel = -1;
if (adapter->surpriseremoved)
return -EIO;
lbs_deb_leave(LBS_DEB_SCAN);
return 0;
}
/**
* @brief Handle Retrieve scan table ioctl
*
......@@ -1552,6 +1414,10 @@ int lbs_get_scan(struct net_device *dev, struct iw_request_info *info,
lbs_deb_enter(LBS_DEB_SCAN);
/* iwlist should wait until the current scan is finished */
if (adapter->last_scanned_channel)
return -EAGAIN;
/* Update RSSI if current BSS is a locally created ad-hoc BSS */
if ((adapter->mode == IW_MODE_ADHOC) && adapter->adhoccreate) {
lbs_prepare_and_send_command(priv, CMD_802_11_RSSI, 0,
......@@ -1609,7 +1475,8 @@ int lbs_get_scan(struct net_device *dev, struct iw_request_info *info,
/**
* @brief Prepare a scan command to be sent to the firmware
*
* Called from lbs_prepare_and_send_command() in cmd.c
* Called via lbs_prepare_and_send_command(priv, CMD_802_11_SCAN, ...)
* from cmd.c
*
* Sends a fixed lenght data part (specifying the BSS type and BSSID filters)
* as well as a variable number/length of TLVs to the firmware.
......@@ -1623,7 +1490,7 @@ int lbs_get_scan(struct net_device *dev, struct iw_request_info *info,
* @return 0 or -1
*/
int lbs_cmd_80211_scan(struct lbs_private *priv,
struct cmd_ds_command *cmd, void *pdata_buf)
struct cmd_ds_command *cmd, void *pdata_buf)
{
struct cmd_ds_802_11_scan *pscan = &cmd->params.scan;
struct lbs_scan_cmd_config *pscancfg = pdata_buf;
......@@ -1635,32 +1502,14 @@ int lbs_cmd_80211_scan(struct lbs_private *priv,
memcpy(pscan->bssid, pscancfg->bssid, ETH_ALEN);
memcpy(pscan->tlvbuffer, pscancfg->tlvbuffer, pscancfg->tlvbufferlen);
cmd->command = cpu_to_le16(CMD_802_11_SCAN);
/* size is equal to the sizeof(fixed portions) + the TLV len + header */
cmd->size = cpu_to_le16(sizeof(pscan->bsstype) + ETH_ALEN
+ pscancfg->tlvbufferlen + S_DS_GEN);
lbs_deb_scan("SCAN_CMD: command 0x%04x, size %d, seqnum %d\n",
le16_to_cpu(cmd->command), le16_to_cpu(cmd->size),
le16_to_cpu(cmd->seqnum));
lbs_deb_leave(LBS_DEB_SCAN);
return 0;
}
static inline int is_same_network(struct bss_descriptor *src,
struct bss_descriptor *dst)
{
/* A network is only a duplicate if the channel, BSSID, and ESSID
* all match. We treat all <hidden> with the same BSSID and channel
* as one network */
return ((src->ssid_len == dst->ssid_len) &&
(src->channel == dst->channel) &&
!compare_ether_addr(src->bssid, dst->bssid) &&
!memcmp(src->ssid, dst->ssid, src->ssid_len));
}
/**
* @brief This function handles the command response of scan
*
......@@ -1725,7 +1574,7 @@ int lbs_ret_80211_scan(struct lbs_private *priv, struct cmd_ds_command *resp)
lbs_deb_scan("SCAN_RESP: bssdescriptsize %d\n", bytesleft);
scanrespsize = le16_to_cpu(get_unaligned((u16*)&resp->size));
lbs_deb_scan("SCAN_RESP: returned %d AP before parsing\n",
lbs_deb_scan("SCAN_RESP: scan results %d\n",
pscan->nr_sets);
pbssinfo = pscan->bssdesc_and_tlvbuffer;
......@@ -1788,7 +1637,7 @@ int lbs_ret_80211_scan(struct lbs_private *priv, struct cmd_ds_command *resp)
continue;
}
lbs_deb_scan("SCAN_RESP: BSSID = %s\n",
lbs_deb_scan("SCAN_RESP: BSSID %s\n",
print_mac(mac, new.bssid));
/* Copy the locally created newbssentry to the scan table */
......
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