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- /**
- * Functions implementing wlan scan IOCTL and firmware command APIs
- *
- * 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 <net/ieee80211.h>
- #include <net/iw_handler.h>
- #include "host.h"
- #include "decl.h"
- #include "dev.h"
- #include "scan.h"
- //! Approximate amount of data needed to pass a scan result back to iwlist
- #define MAX_SCAN_CELL_SIZE (IW_EV_ADDR_LEN \
- + IW_ESSID_MAX_SIZE \
- + IW_EV_UINT_LEN \
- + IW_EV_FREQ_LEN \
- + IW_EV_QUAL_LEN \
- + IW_ESSID_MAX_SIZE \
- + IW_EV_PARAM_LEN \
- + 40) /* 40 for WPAIE */
- //! Memory needed to store a max sized channel List TLV for a firmware scan
- #define CHAN_TLV_MAX_SIZE (sizeof(struct mrvlietypesheader) \
- + (MRVDRV_MAX_CHANNELS_PER_SCAN \
- * sizeof(struct chanscanparamset)))
- //! Memory needed to store a max number/size SSID TLV for a firmware scan
- #define SSID_TLV_MAX_SIZE (1 * sizeof(struct mrvlietypes_ssidparamset))
- //! Maximum memory needed for a wlan_scan_cmd_config with all TLVs at max
- #define MAX_SCAN_CFG_ALLOC (sizeof(struct wlan_scan_cmd_config) \
- + sizeof(struct mrvlietypes_numprobes) \
- + CHAN_TLV_MAX_SIZE \
- + SSID_TLV_MAX_SIZE)
- //! The maximum number of channels the firmware can scan per command
- #define MRVDRV_MAX_CHANNELS_PER_SCAN 14
- /**
- * @brief Number of channels to scan per firmware scan command issuance.
- *
- * Number restricted to prevent hitting the limit on the amount of scan data
- * returned in a single firmware scan command.
- */
- #define MRVDRV_CHANNELS_PER_SCAN_CMD 4
- //! Scan time specified in the channel TLV for each channel for passive scans
- #define MRVDRV_PASSIVE_SCAN_CHAN_TIME 100
- //! Scan time specified in the channel TLV for each channel for active scans
- #define MRVDRV_ACTIVE_SCAN_CHAN_TIME 100
- //! Macro to enable/disable SSID checking before storing a scan table
- #ifdef DISCARD_BAD_SSID
- #define CHECK_SSID_IS_VALID(x) ssid_valid(&bssidEntry.ssid)
- #else
- #define CHECK_SSID_IS_VALID(x) 1
- #endif
- /**
- * @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 adapter A pointer to wlan_adapter
- * @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(wlan_adapter * adapter, int index, u8 mode)
- {
- ENTER();
- if (adapter->scantable[index].mode == mode) {
- if ( !adapter->secinfo.wep_enabled
- && !adapter->secinfo.WPAenabled
- && !adapter->secinfo.WPA2enabled
- && adapter->scantable[index].wpa_ie[0] != WPA_IE
- && adapter->scantable[index].rsn_ie[0] != WPA2_IE
- && !adapter->scantable[index].privacy) {
- /* no security */
- LEAVE();
- return index;
- } else if ( adapter->secinfo.wep_enabled
- && !adapter->secinfo.WPAenabled
- && !adapter->secinfo.WPA2enabled
- && adapter->scantable[index].privacy) {
- /* static WEP enabled */
- LEAVE();
- return index;
- } else if ( !adapter->secinfo.wep_enabled
- && adapter->secinfo.WPAenabled
- && !adapter->secinfo.WPA2enabled
- && (adapter->scantable[index].wpa_ie[0] == WPA_IE)
- /* privacy bit may NOT be set in some APs like LinkSys WRT54G
- && adapter->scantable[index].privacy */
- ) {
- /* WPA enabled */
- lbs_pr_debug(1,
- "is_network_compatible() WPA: index=%d wpa_ie=%#x "
- "wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s "
- "privacy=%#x\n", index,
- adapter->scantable[index].wpa_ie[0],
- adapter->scantable[index].rsn_ie[0],
- adapter->secinfo.wep_enabled ? "e" : "d",
- adapter->secinfo.WPAenabled ? "e" : "d",
- adapter->secinfo.WPA2enabled ? "e" : "d",
- adapter->scantable[index].privacy);
- LEAVE();
- return index;
- } else if ( !adapter->secinfo.wep_enabled
- && !adapter->secinfo.WPAenabled
- && adapter->secinfo.WPA2enabled
- && (adapter->scantable[index].rsn_ie[0] == WPA2_IE)
- /* privacy bit may NOT be set in some APs like LinkSys WRT54G
- && adapter->scantable[index].privacy */
- ) {
- /* WPA2 enabled */
- lbs_pr_debug(1,
- "is_network_compatible() WPA2: index=%d wpa_ie=%#x "
- "wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s "
- "privacy=%#x\n", index,
- adapter->scantable[index].wpa_ie[0],
- adapter->scantable[index].rsn_ie[0],
- adapter->secinfo.wep_enabled ? "e" : "d",
- adapter->secinfo.WPAenabled ? "e" : "d",
- adapter->secinfo.WPA2enabled ? "e" : "d",
- adapter->scantable[index].privacy);
- LEAVE();
- return index;
- } else if ( !adapter->secinfo.wep_enabled
- && !adapter->secinfo.WPAenabled
- && !adapter->secinfo.WPA2enabled
- && (adapter->scantable[index].wpa_ie[0] != WPA_IE)
- && (adapter->scantable[index].rsn_ie[0] != WPA2_IE)
- && adapter->scantable[index].privacy) {
- /* dynamic WEP enabled */
- lbs_pr_debug(1,
- "is_network_compatible() dynamic WEP: index=%d "
- "wpa_ie=%#x wpa2_ie=%#x privacy=%#x\n",
- index,
- adapter->scantable[index].wpa_ie[0],
- adapter->scantable[index].rsn_ie[0],
- adapter->scantable[index].privacy);
- LEAVE();
- return index;
- }
- /* security doesn't match */
- lbs_pr_debug(1,
- "is_network_compatible() FAILED: index=%d wpa_ie=%#x "
- "wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s privacy=%#x\n",
- index,
- adapter->scantable[index].wpa_ie[0],
- adapter->scantable[index].rsn_ie[0],
- adapter->secinfo.wep_enabled ? "e" : "d",
- adapter->secinfo.WPAenabled ? "e" : "d",
- adapter->secinfo.WPA2enabled ? "e" : "d",
- adapter->scantable[index].privacy);
- LEAVE();
- return -ECONNREFUSED;
- }
- /* mode doesn't match */
- LEAVE();
- return -ENETUNREACH;
- }
- /**
- * @brief This function validates a SSID as being able to be printed
- *
- * @param pssid SSID structure to validate
- *
- * @return TRUE or FALSE
- */
- static u8 ssid_valid(struct WLAN_802_11_SSID *pssid)
- {
- int ssididx;
- for (ssididx = 0; ssididx < pssid->ssidlength; ssididx++) {
- if (!isprint(pssid->ssid[ssididx])) {
- return 0;
- }
- }
- return 1;
- }
- /**
- * @brief Post process the scan table after a new scan command has completed
- *
- * Inspect each entry of the scan table and try to find an entry that
- * matches our current associated/joined network from the scan. If
- * one is found, update the stored copy of the bssdescriptor for our
- * current network.
- *
- * Debug dump the current scan table contents if compiled accordingly.
- *
- * @param priv A pointer to wlan_private structure
- *
- * @return void
- */
- static void wlan_scan_process_results(wlan_private * priv)
- {
- wlan_adapter *adapter = priv->adapter;
- int foundcurrent;
- int i;
- foundcurrent = 0;
- if (adapter->connect_status == libertas_connected) {
- /* try to find the current BSSID in the new scan list */
- for (i = 0; i < adapter->numinscantable; i++) {
- if (!libertas_SSID_cmp(&adapter->scantable[i].ssid,
- &adapter->curbssparams.ssid) &&
- !memcmp(adapter->curbssparams.bssid,
- adapter->scantable[i].macaddress,
- ETH_ALEN)) {
- foundcurrent = 1;
- }
- }
- if (foundcurrent) {
- /* Make a copy of current BSSID descriptor */
- memcpy(&adapter->curbssparams.bssdescriptor,
- &adapter->scantable[i],
- sizeof(adapter->curbssparams.bssdescriptor));
- }
- }
- for (i = 0; i < adapter->numinscantable; i++) {
- lbs_pr_debug(1, "Scan:(%02d) %02x:%02x:%02x:%02x:%02x:%02x, "
- "RSSI[%03d], SSID[%s]\n",
- i,
- adapter->scantable[i].macaddress[0],
- adapter->scantable[i].macaddress[1],
- adapter->scantable[i].macaddress[2],
- adapter->scantable[i].macaddress[3],
- adapter->scantable[i].macaddress[4],
- adapter->scantable[i].macaddress[5],
- (s32) adapter->scantable[i].rssi,
- adapter->scantable[i].ssid.ssid);
- }
- }
- /**
- * @brief Create a channel list for the driver to scan based on region info
- *
- * Use the driver region/band information to construct a comprehensive list
- * of channels to scan. This routine is used for any scan that is not
- * provided a specific channel list to scan.
- *
- * @param priv A pointer to wlan_private structure
- * @param scanchanlist Output parameter: resulting channel list to scan
- * @param filteredscan 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.
- *
- * @return void
- */
- static void wlan_scan_create_channel_list(wlan_private * priv,
- struct chanscanparamset * scanchanlist,
- u8 filteredscan)
- {
- wlan_adapter *adapter = priv->adapter;
- struct region_channel *scanregion;
- struct chan_freq_power *cfp;
- int rgnidx;
- int chanidx;
- int nextchan;
- u8 scantype;
- chanidx = 0;
- /* Set the default scan type to the user specified type, will later
- * be changed to passive on a per channel basis if restricted by
- * regulatory requirements (11d or 11h)
- */
- scantype = adapter->scantype;
- for (rgnidx = 0; rgnidx < ARRAY_SIZE(adapter->region_channel); rgnidx++) {
- if (priv->adapter->enable11d &&
- adapter->connect_status != libertas_connected) {
- /* Scan all the supported chan for the first scan */
- if (!adapter->universal_channel[rgnidx].valid)
- continue;
- scanregion = &adapter->universal_channel[rgnidx];
- /* clear the parsed_region_chan for the first scan */
- memset(&adapter->parsed_region_chan, 0x00,
- sizeof(adapter->parsed_region_chan));
- } else {
- if (!adapter->region_channel[rgnidx].valid)
- continue;
- scanregion = &adapter->region_channel[rgnidx];
- }
- for (nextchan = 0;
- nextchan < scanregion->nrcfp; nextchan++, chanidx++) {
- cfp = scanregion->CFP + nextchan;
- if (priv->adapter->enable11d) {
- scantype =
- libertas_get_scan_type_11d(cfp->channel,
- &adapter->
- parsed_region_chan);
- }
- switch (scanregion->band) {
- case BAND_B:
- case BAND_G:
- default:
- scanchanlist[chanidx].radiotype =
- cmd_scan_radio_type_bg;
- break;
- }
- if (scantype == cmd_scan_type_passive) {
- scanchanlist[chanidx].maxscantime =
- cpu_to_le16
- (MRVDRV_PASSIVE_SCAN_CHAN_TIME);
- scanchanlist[chanidx].chanscanmode.passivescan =
- 1;
- } else {
- scanchanlist[chanidx].maxscantime =
- cpu_to_le16
- (MRVDRV_ACTIVE_SCAN_CHAN_TIME);
- scanchanlist[chanidx].chanscanmode.passivescan =
- 0;
- }
- scanchanlist[chanidx].channumber = cfp->channel;
- if (filteredscan) {
- scanchanlist[chanidx].chanscanmode.
- disablechanfilt = 1;
- }
- }
- }
- }
- /**
- * @brief Construct a wlan_scan_cmd_config structure to use in issue scan cmds
- *
- * Application layer or other functions can invoke wlan_scan_networks
- * with a scan configuration supplied in a wlan_ioctl_user_scan_cfg struct.
- * This structure is used as the basis of one or many wlan_scan_cmd_config
- * commands that are sent to the command processing module and sent to
- * firmware.
- *
- * Create a wlan_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.
- * If the number of probes is not set, use the adapter default setting
- * Qualify the channel
- *
- * @param priv A pointer to wlan_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
- *
- * @return resulting scan configuration
- */
- static struct wlan_scan_cmd_config *
- wlan_scan_setup_scan_config(wlan_private * priv,
- const struct wlan_ioctl_user_scan_cfg * puserscanin,
- struct mrvlietypes_chanlistparamset ** ppchantlvout,
- struct chanscanparamset * pscanchanlist,
- int *pmaxchanperscan,
- u8 * pfilteredscan,
- u8 * pscancurrentonly)
- {
- wlan_adapter *adapter = priv->adapter;
- const u8 zeromac[ETH_ALEN] = { 0, 0, 0, 0, 0, 0 };
- struct mrvlietypes_numprobes *pnumprobestlv;
- struct mrvlietypes_ssidparamset *pssidtlv;
- struct wlan_scan_cmd_config * pscancfgout = NULL;
- u8 *ptlvpos;
- u16 numprobes;
- u16 ssidlen;
- int chanidx;
- int scantype;
- int scandur;
- int channel;
- int radiotype;
- 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 : adapter->
- scanmode);
- /* Set the number of probes to send, use adapter setting if unset */
- numprobes = (puserscanin->numprobes ? puserscanin->numprobes :
- adapter->scanprobes);
- /*
- * Set the BSSID filter to the incoming configuration,
- * if non-zero. If not set, it will remain disabled (all zeros).
- */
- memcpy(pscancfgout->specificBSSID,
- puserscanin->specificBSSID,
- sizeof(pscancfgout->specificBSSID));
- ssidlen = strlen(puserscanin->specificSSID);
- if (ssidlen) {
- pssidtlv =
- (struct mrvlietypes_ssidparamset *) pscancfgout->
- tlvbuffer;
- pssidtlv->header.type = cpu_to_le16(TLV_TYPE_SSID);
- pssidtlv->header.len = cpu_to_le16(ssidlen);
- memcpy(pssidtlv->ssid, puserscanin->specificSSID,
- ssidlen);
- ptlvpos += sizeof(pssidtlv->header) + ssidlen;
- }
- /*
- * 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 (ssidlen || (memcmp(pscancfgout->specificBSSID,
- &zeromac, sizeof(zeromac)) != 0)) {
- *pmaxchanperscan = MRVDRV_MAX_CHANNELS_PER_SCAN;
- *pfilteredscan = 1;
- }
- } else {
- pscancfgout->bsstype = adapter->scanmode;
- numprobes = adapter->scanprobes;
- }
- /* If the input config or adapter has the number of Probes set, add tlv */
- if (numprobes) {
- pnumprobestlv = (struct mrvlietypes_numprobes *) ptlvpos;
- pnumprobestlv->header.type =
- cpu_to_le16(TLV_TYPE_NUMPROBES);
- pnumprobestlv->header.len = sizeof(pnumprobestlv->numprobes);
- pnumprobestlv->numprobes = cpu_to_le16(numprobes);
- ptlvpos +=
- sizeof(pnumprobestlv->header) + pnumprobestlv->header.len;
- pnumprobestlv->header.len =
- cpu_to_le16(pnumprobestlv->header.len);
- }
- /*
- * Set the output for the channel TLV to the address in the tlv buffer
- * past any TLVs that were added in this fuction (SSID, numprobes).
- * channel TLVs will be added past this for each scan command, preserving
- * the TLVs that were previously added.
- */
- *ppchantlvout = (struct mrvlietypes_chanlistparamset *) ptlvpos;
- if (puserscanin && puserscanin->chanlist[0].channumber) {
- lbs_pr_debug(1, "Scan: Using supplied channel list\n");
- for (chanidx = 0;
- chanidx < WLAN_IOCTL_USER_SCAN_CHAN_MAX
- && puserscanin->chanlist[chanidx].channumber; chanidx++) {
- channel = puserscanin->chanlist[chanidx].channumber;
- (pscanchanlist + chanidx)->channumber = channel;
- radiotype = puserscanin->chanlist[chanidx].radiotype;
- (pscanchanlist + chanidx)->radiotype = radiotype;
- scantype = puserscanin->chanlist[chanidx].scantype;
- if (scantype == cmd_scan_type_passive) {
- (pscanchanlist +
- chanidx)->chanscanmode.passivescan = 1;
- } else {
- (pscanchanlist +
- chanidx)->chanscanmode.passivescan = 0;
- }
- if (puserscanin->chanlist[chanidx].scantime) {
- scandur =
- puserscanin->chanlist[chanidx].scantime;
- } else {
- if (scantype == cmd_scan_type_passive) {
- scandur = MRVDRV_PASSIVE_SCAN_CHAN_TIME;
- } else {
- scandur = MRVDRV_ACTIVE_SCAN_CHAN_TIME;
- }
- }
- (pscanchanlist + chanidx)->minscantime =
- cpu_to_le16(scandur);
- (pscanchanlist + chanidx)->maxscantime =
- cpu_to_le16(scandur);
- }
- /* Check if we are only scanning the current channel */
- if ((chanidx == 1) && (puserscanin->chanlist[0].channumber
- ==
- priv->adapter->curbssparams.channel)) {
- *pscancurrentonly = 1;
- lbs_pr_debug(1, "Scan: Scanning current channel only");
- }
- } else {
- lbs_pr_debug(1, "Scan: Creating full region channel list\n");
- wlan_scan_create_channel_list(priv, pscanchanlist,
- *pfilteredscan);
- }
- out:
- return pscancfgout;
- }
- /**
- * @brief Construct and send multiple scan config commands to the firmware
- *
- * Previous routines have created a wlan_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 wlan_cmd routines for execution in the firmware.
- *
- * @param priv A pointer to wlan_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
- *
- * @return 0 or error return otherwise
- */
- static int wlan_scan_channel_list(wlan_private * priv,
- int maxchanperscan,
- u8 filteredscan,
- struct wlan_scan_cmd_config * pscancfgout,
- struct mrvlietypes_chanlistparamset * pchantlvout,
- struct chanscanparamset * pscanchanlist)
- {
- struct chanscanparamset *ptmpchan;
- struct chanscanparamset *pstartchan;
- u8 scanband;
- int doneearly;
- int tlvidx;
- int ret = 0;
- ENTER();
- if (pscancfgout == 0 || pchantlvout == 0 || pscanchanlist == 0) {
- lbs_pr_debug(1, "Scan: Null detect: %p, %p, %p\n",
- pscancfgout, pchantlvout, pscanchanlist);
- return -1;
- }
- pchantlvout->header.type = cpu_to_le16(TLV_TYPE_CHANLIST);
- /* Set the temp channel struct pointer to the start of the desired list */
- ptmpchan = pscanchanlist;
- /* 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) {
- lbs_pr_debug(1,
- "Scan: Chan(%3d), Radio(%d), mode(%d,%d), Dur(%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 */
- 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)
- + 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++;
- /* 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 = libertas_prepare_and_send_command(priv, cmd_802_11_scan, 0,
- 0, 0, pscancfgout);
- }
- LEAVE();
- return ret;
- }
- /**
- * @brief Internal function used to start a scan based on an input config
- *
- * 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
- *
- * @param priv A pointer to wlan_private structure
- * @param puserscanin Pointer to the input configuration for the requested
- * scan.
- *
- * @return 0 or < 0 if error
- */
- int wlan_scan_networks(wlan_private * priv,
- const struct wlan_ioctl_user_scan_cfg * puserscanin)
- {
- wlan_adapter *adapter = priv->adapter;
- struct mrvlietypes_chanlistparamset *pchantlvout;
- struct chanscanparamset * scan_chan_list = NULL;
- struct wlan_scan_cmd_config * scan_cfg = NULL;
- u8 keeppreviousscan;
- u8 filteredscan;
- u8 scancurrentchanonly;
- int maxchanperscan;
- int ret;
- ENTER();
- scan_chan_list = kzalloc(sizeof(struct chanscanparamset) *
- WLAN_IOCTL_USER_SCAN_CHAN_MAX, GFP_KERNEL);
- if (scan_chan_list == NULL) {
- ret = -ENOMEM;
- goto out;
- }
- scan_cfg = wlan_scan_setup_scan_config(priv,
- puserscanin,
- &pchantlvout,
- scan_chan_list,
- &maxchanperscan,
- &filteredscan,
- &scancurrentchanonly);
- if (scan_cfg == NULL) {
- ret = -ENOMEM;
- goto out;
- }
- keeppreviousscan = 0;
- if (puserscanin) {
- keeppreviousscan = puserscanin->keeppreviousscan;
- }
- if (!keeppreviousscan) {
- memset(adapter->scantable, 0x00,
- sizeof(struct bss_descriptor) * MRVDRV_MAX_BSSID_LIST);
- adapter->numinscantable = 0;
- }
- /* Keep the data path active if we are only scanning our current channel */
- if (!scancurrentchanonly) {
- netif_stop_queue(priv->wlan_dev.netdev);
- netif_carrier_off(priv->wlan_dev.netdev);
- }
- ret = wlan_scan_channel_list(priv,
- maxchanperscan,
- filteredscan,
- scan_cfg,
- pchantlvout,
- scan_chan_list);
- /* Process the resulting scan table:
- * - Remove any bad ssids
- * - Update our current BSS information from scan data
- */
- wlan_scan_process_results(priv);
- if (priv->adapter->connect_status == libertas_connected) {
- netif_carrier_on(priv->wlan_dev.netdev);
- netif_wake_queue(priv->wlan_dev.netdev);
- }
- out:
- if (scan_cfg)
- kfree(scan_cfg);
- if (scan_chan_list)
- kfree(scan_chan_list);
- LEAVE();
- return ret;
- }
- /**
- * @brief Inspect the scan response buffer for pointers to expected TLVs
- *
- * TLVs can be included at the end of the scan response BSS information.
- * Parse the data in the buffer for pointers to TLVs that can potentially
- * be passed back in the response
- *
- * @param ptlv Pointer to the start of the TLV buffer to parse
- * @param tlvbufsize size of the TLV buffer
- * @param ptsftlv Output parameter: Pointer to the TSF TLV if found
- *
- * @return void
- */
- static
- void wlan_ret_802_11_scan_get_tlv_ptrs(struct mrvlietypes_data * ptlv,
- int tlvbufsize,
- struct mrvlietypes_tsftimestamp ** ptsftlv)
- {
- struct mrvlietypes_data *pcurrenttlv;
- int tlvbufleft;
- u16 tlvtype;
- u16 tlvlen;
- pcurrenttlv = ptlv;
- tlvbufleft = tlvbufsize;
- *ptsftlv = NULL;
- lbs_pr_debug(1, "SCAN_RESP: tlvbufsize = %d\n", tlvbufsize);
- lbs_dbg_hex("SCAN_RESP: TLV Buf", (u8 *) ptlv, tlvbufsize);
- while (tlvbufleft >= sizeof(struct mrvlietypesheader)) {
- tlvtype = le16_to_cpu(pcurrenttlv->header.type);
- tlvlen = le16_to_cpu(pcurrenttlv->header.len);
- switch (tlvtype) {
- case TLV_TYPE_TSFTIMESTAMP:
- *ptsftlv = (struct mrvlietypes_tsftimestamp *) pcurrenttlv;
- break;
- default:
- lbs_pr_debug(1, "SCAN_RESP: Unhandled TLV = %d\n",
- tlvtype);
- /* Give up, this seems corrupted */
- return;
- } /* switch */
- tlvbufleft -= (sizeof(ptlv->header) + tlvlen);
- pcurrenttlv =
- (struct mrvlietypes_data *) (pcurrenttlv->Data + tlvlen);
- } /* while */
- }
- /**
- * @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.
- *
- * @param pBSSIDEntry Output parameter: Pointer to the BSS Entry
- *
- * @return 0 or -1
- */
- static int InterpretBSSDescriptionWithIE(struct bss_descriptor * pBSSEntry,
- u8 ** pbeaconinfo, int *bytesleft)
- {
- enum ieeetypes_elementid elemID;
- struct ieeetypes_fhparamset *pFH;
- struct ieeetypes_dsparamset *pDS;
- struct ieeetypes_cfparamset *pCF;
- struct ieeetypes_ibssparamset *pibss;
- struct ieeetypes_capinfo *pcap;
- struct WLAN_802_11_FIXED_IEs fixedie;
- u8 *pcurrentptr;
- u8 *pRate;
- u8 elemlen;
- u8 bytestocopy;
- u8 ratesize;
- u16 beaconsize;
- u8 founddatarateie;
- int bytesleftforcurrentbeacon;
- struct IE_WPA *pIe;
- const u8 oui01[4] = { 0x00, 0x50, 0xf2, 0x01 };
- struct ieeetypes_countryinfoset *pcountryinfo;
- ENTER();
- founddatarateie = 0;
- ratesize = 0;
- beaconsize = 0;
- if (*bytesleft >= sizeof(beaconsize)) {
- /* Extract & convert beacon size from the command buffer */
- memcpy(&beaconsize, *pbeaconinfo, sizeof(beaconsize));
- beaconsize = le16_to_cpu(beaconsize);
- *bytesleft -= sizeof(beaconsize);
- *pbeaconinfo += sizeof(beaconsize);
- }
- if (beaconsize == 0 || beaconsize > *bytesleft) {
- *pbeaconinfo += *bytesleft;
- *bytesleft = 0;
- return -1;
- }
- /* Initialize the current working beacon pointer for this BSS iteration */
- pcurrentptr = *pbeaconinfo;
- /* Advance the return beacon pointer past the current beacon */
- *pbeaconinfo += beaconsize;
- *bytesleft -= beaconsize;
- bytesleftforcurrentbeacon = beaconsize;
- memcpy(pBSSEntry->macaddress, pcurrentptr, ETH_ALEN);
- lbs_pr_debug(1, "InterpretIE: AP MAC Addr-%x:%x:%x:%x:%x:%x\n",
- pBSSEntry->macaddress[0], pBSSEntry->macaddress[1],
- pBSSEntry->macaddress[2], pBSSEntry->macaddress[3],
- pBSSEntry->macaddress[4], pBSSEntry->macaddress[5]);
- pcurrentptr += ETH_ALEN;
- bytesleftforcurrentbeacon -= ETH_ALEN;
- if (bytesleftforcurrentbeacon < 12) {
- lbs_pr_debug(1, "InterpretIE: Not enough bytes left\n");
- return -1;
- }
- /*
- * next 4 fields are RSSI, time stamp, beacon interval,
- * and capability information
- */
- /* RSSI is 1 byte long */
- pBSSEntry->rssi = le32_to_cpu((long)(*pcurrentptr));
- lbs_pr_debug(1, "InterpretIE: RSSI=%02X\n", *pcurrentptr);
- pcurrentptr += 1;
- bytesleftforcurrentbeacon -= 1;
- /* time stamp is 8 bytes long */
- memcpy(fixedie.timestamp, pcurrentptr, 8);
- memcpy(pBSSEntry->timestamp, pcurrentptr, 8);
- pcurrentptr += 8;
- bytesleftforcurrentbeacon -= 8;
- /* beacon interval is 2 bytes long */
- memcpy(&fixedie.beaconinterval, pcurrentptr, 2);
- pBSSEntry->beaconperiod = le16_to_cpu(fixedie.beaconinterval);
- pcurrentptr += 2;
- bytesleftforcurrentbeacon -= 2;
- /* capability information is 2 bytes long */
- memcpy(&fixedie.capabilities, pcurrentptr, 2);
- lbs_pr_debug(1, "InterpretIE: fixedie.capabilities=0x%X\n",
- fixedie.capabilities);
- fixedie.capabilities = le16_to_cpu(fixedie.capabilities);
- pcap = (struct ieeetypes_capinfo *) & fixedie.capabilities;
- memcpy(&pBSSEntry->cap, pcap, sizeof(struct ieeetypes_capinfo));
- pcurrentptr += 2;
- bytesleftforcurrentbeacon -= 2;
- /* rest of the current buffer are IE's */
- lbs_pr_debug(1, "InterpretIE: IElength for this AP = %d\n",
- bytesleftforcurrentbeacon);
- lbs_dbg_hex("InterpretIE: IE info", (u8 *) pcurrentptr,
- bytesleftforcurrentbeacon);
- if (pcap->privacy) {
- lbs_pr_debug(1, "InterpretIE: AP WEP enabled\n");
- pBSSEntry->privacy = wlan802_11privfilter8021xWEP;
- } else {
- pBSSEntry->privacy = wlan802_11privfilteracceptall;
- }
- if (pcap->ibss == 1) {
- pBSSEntry->mode = IW_MODE_ADHOC;
- } else {
- pBSSEntry->mode = IW_MODE_INFRA;
- }
- /* process variable IE */
- while (bytesleftforcurrentbeacon >= 2) {
- elemID = (enum ieeetypes_elementid) (*((u8 *) pcurrentptr));
- elemlen = *((u8 *) pcurrentptr + 1);
- if (bytesleftforcurrentbeacon < elemlen) {
- lbs_pr_debug(1, "InterpretIE: error in processing IE, "
- "bytes left < IE length\n");
- bytesleftforcurrentbeacon = 0;
- continue;
- }
- switch (elemID) {
- case SSID:
- pBSSEntry->ssid.ssidlength = elemlen;
- memcpy(pBSSEntry->ssid.ssid, (pcurrentptr + 2),
- elemlen);
- lbs_pr_debug(1, "ssid: %32s", pBSSEntry->ssid.ssid);
- break;
- case SUPPORTED_RATES:
- memcpy(pBSSEntry->datarates, (pcurrentptr + 2),
- elemlen);
- memmove(pBSSEntry->libertas_supported_rates, (pcurrentptr + 2),
- elemlen);
- ratesize = elemlen;
- founddatarateie = 1;
- break;
- case EXTRA_IE:
- lbs_pr_debug(1, "InterpretIE: EXTRA_IE Found!\n");
- pBSSEntry->extra_ie = 1;
- break;
- case FH_PARAM_SET:
- pFH = (struct ieeetypes_fhparamset *) pcurrentptr;
- memmove(&pBSSEntry->phyparamset.fhparamset, pFH,
- sizeof(struct ieeetypes_fhparamset));
- pBSSEntry->phyparamset.fhparamset.dwelltime
- =
- le16_to_cpu(pBSSEntry->phyparamset.fhparamset.
- dwelltime);
- break;
- case DS_PARAM_SET:
- pDS = (struct ieeetypes_dsparamset *) pcurrentptr;
- pBSSEntry->channel = pDS->currentchan;
- memcpy(&pBSSEntry->phyparamset.dsparamset, pDS,
- sizeof(struct ieeetypes_dsparamset));
- break;
- case CF_PARAM_SET:
- pCF = (struct ieeetypes_cfparamset *) pcurrentptr;
- memcpy(&pBSSEntry->ssparamset.cfparamset, pCF,
- sizeof(struct ieeetypes_cfparamset));
- break;
- case IBSS_PARAM_SET:
- pibss = (struct ieeetypes_ibssparamset *) pcurrentptr;
- pBSSEntry->atimwindow =
- le32_to_cpu(pibss->atimwindow);
- memmove(&pBSSEntry->ssparamset.ibssparamset, pibss,
- sizeof(struct ieeetypes_ibssparamset));
- pBSSEntry->ssparamset.ibssparamset.atimwindow
- =
- le16_to_cpu(pBSSEntry->ssparamset.ibssparamset.
- atimwindow);
- break;
- /* Handle Country Info IE */
- case COUNTRY_INFO:
- pcountryinfo =
- (struct ieeetypes_countryinfoset *) pcurrentptr;
- if (pcountryinfo->len <
- sizeof(pcountryinfo->countrycode)
- || pcountryinfo->len > 254) {
- lbs_pr_debug(1, "InterpretIE: 11D- Err "
- "CountryInfo len =%d min=%zd max=254\n",
- pcountryinfo->len,
- sizeof(pcountryinfo->countrycode));
- LEAVE();
- return -1;
- }
- memcpy(&pBSSEntry->countryinfo,
- pcountryinfo, pcountryinfo->len + 2);
- lbs_dbg_hex("InterpretIE: 11D- CountryInfo:",
- (u8 *) pcountryinfo,
- (u32) (pcountryinfo->len + 2));
- break;
- case EXTENDED_SUPPORTED_RATES:
- /*
- * only process extended supported rate
- * if data rate is already found.
- * data rate IE should come before
- * extended supported rate IE
- */
- if (founddatarateie) {
- if ((elemlen + ratesize) > WLAN_SUPPORTED_RATES) {
- bytestocopy =
- (WLAN_SUPPORTED_RATES - ratesize);
- } else {
- bytestocopy = elemlen;
- }
- pRate = (u8 *) pBSSEntry->datarates;
- pRate += ratesize;
- memmove(pRate, (pcurrentptr + 2), bytestocopy);
- pRate = (u8 *) pBSSEntry->libertas_supported_rates;
- pRate += ratesize;
- memmove(pRate, (pcurrentptr + 2), bytestocopy);
- }
- break;
- case VENDOR_SPECIFIC_221:
- #define IE_ID_LEN_FIELDS_BYTES 2
- pIe = (struct IE_WPA *)pcurrentptr;
- if (memcmp(pIe->oui, oui01, sizeof(oui01)))
- break;
- pBSSEntry->wpa_ie_len = min_t(size_t,
- elemlen + IE_ID_LEN_FIELDS_BYTES,
- sizeof(pBSSEntry->wpa_ie));
- memcpy(pBSSEntry->wpa_ie, pcurrentptr,
- pBSSEntry->wpa_ie_len);
- lbs_dbg_hex("InterpretIE: Resp WPA_IE",
- pBSSEntry->wpa_ie, elemlen);
- break;
- case WPA2_IE:
- pIe = (struct IE_WPA *)pcurrentptr;
- pBSSEntry->rsn_ie_len = min_t(size_t,
- elemlen + IE_ID_LEN_FIELDS_BYTES,
- sizeof(pBSSEntry->rsn_ie));
- memcpy(pBSSEntry->rsn_ie, pcurrentptr,
- pBSSEntry->rsn_ie_len);
- lbs_dbg_hex("InterpretIE: Resp WPA2_IE",
- pBSSEntry->rsn_ie, elemlen);
- break;
- case TIM:
- break;
- case CHALLENGE_TEXT:
- break;
- }
- pcurrentptr += elemlen + 2;
- /* need to account for IE ID and IE len */
- bytesleftforcurrentbeacon -= (elemlen + 2);
- } /* while (bytesleftforcurrentbeacon > 2) */
- return 0;
- }
- /**
- * @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 libertas_SSID_cmp(struct WLAN_802_11_SSID *ssid1, struct WLAN_802_11_SSID *ssid2)
- {
- if (!ssid1 || !ssid2)
- return -1;
- if (ssid1->ssidlength != ssid2->ssidlength)
- return -1;
- return memcmp(ssid1->ssid, ssid2->ssid, ssid1->ssidlength);
- }
- /**
- * @brief This function finds a specific compatible BSSID in the scan list
- *
- * @param adapter A pointer to wlan_adapter
- * @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)
- */
- int libertas_find_BSSID_in_list(wlan_adapter * adapter, u8 * bssid, u8 mode)
- {
- int ret = -ENETUNREACH;
- int i;
- if (!bssid)
- return -EFAULT;
- lbs_pr_debug(1, "FindBSSID: Num of BSSIDs = %d\n",
- adapter->numinscantable);
- /* Look through the scan table for a compatible match. The ret return
- * variable will be equal to the index in the scan table (greater
- * than zero) if the network is compatible. 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
- */
- for (i = 0; ret < 0 && i < adapter->numinscantable; i++) {
- if (!memcmp(adapter->scantable[i].macaddress, bssid, ETH_ALEN)) {
- switch (mode) {
- case IW_MODE_INFRA:
- case IW_MODE_ADHOC:
- ret = is_network_compatible(adapter, i, mode);
- break;
- default:
- ret = i;
- break;
- }
- }
- }
- return ret;
- }
- /**
- * @brief This function finds ssid in ssid list.
- *
- * @param adapter A pointer to wlan_adapter
- * @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
- */
- int libertas_find_SSID_in_list(wlan_adapter * adapter,
- struct WLAN_802_11_SSID *ssid, u8 * bssid, u8 mode)
- {
- int net = -ENETUNREACH;
- u8 bestrssi = 0;
- int i;
- int j;
- lbs_pr_debug(1, "Num of Entries in Table = %d\n", adapter->numinscantable);
- for (i = 0; i < adapter->numinscantable; i++) {
- if (!libertas_SSID_cmp(&adapter->scantable[i].ssid, ssid) &&
- (!bssid ||
- !memcmp(adapter->scantable[i].
- macaddress, bssid, ETH_ALEN))) {
- switch (mode) {
- case IW_MODE_INFRA:
- case IW_MODE_ADHOC:
- j = is_network_compatible(adapter, i, mode);
- if (j >= 0) {
- if (bssid) {
- return i;
- }
- if (SCAN_RSSI
- (adapter->scantable[i].rssi)
- > bestrssi) {
- bestrssi =
- SCAN_RSSI(adapter->
- scantable[i].
- rssi);
- net = i;
- }
- } else {
- if (net == -ENETUNREACH) {
- net = j;
- }
- }
- break;
- case IW_MODE_AUTO:
- default:
- if (SCAN_RSSI(adapter->scantable[i].rssi)
- > bestrssi) {
- bestrssi =
- SCAN_RSSI(adapter->scantable[i].
- rssi);
- net = i;
- }
- break;
- }
- }
- }
- return net;
- }
- /**
- * @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 adapter A pointer to wlan_adapter
- *
- * @return index in BSSID list
- */
- int libertas_find_best_SSID_in_list(wlan_adapter * adapter, u8 mode)
- {
- int bestnet = -ENETUNREACH;
- u8 bestrssi = 0;
- int i;
- ENTER();
- lbs_pr_debug(1, "Num of BSSIDs = %d\n", adapter->numinscantable);
- for (i = 0; i < adapter->numinscantable; i++) {
- switch (mode) {
- case IW_MODE_INFRA:
- case IW_MODE_ADHOC:
- if (is_network_compatible(adapter, i, mode) >= 0) {
- if (SCAN_RSSI(adapter->scantable[i].rssi) >
- bestrssi) {
- bestrssi =
- SCAN_RSSI(adapter->scantable[i].
- rssi);
- bestnet = i;
- }
- }
- break;
- case IW_MODE_AUTO:
- default:
- if (SCAN_RSSI(adapter->scantable[i].rssi) > bestrssi) {
- bestrssi =
- SCAN_RSSI(adapter->scantable[i].rssi);
- bestnet = i;
- }
- break;
- }
- }
- LEAVE();
- return bestnet;
- }
- /**
- * @brief Find the AP with specific ssid in the scan list
- *
- * @param priv A pointer to wlan_private structure
- * @param pSSID A pointer to AP's ssid
- *
- * @return 0--success, otherwise--fail
- */
- int libertas_find_best_network_SSID(wlan_private * priv,
- struct WLAN_802_11_SSID *pSSID,
- u8 preferred_mode, u8 *out_mode)
- {
- wlan_adapter *adapter = priv->adapter;
- int ret = 0;
- struct bss_descriptor *preqbssid;
- int i;
- ENTER();
- memset(pSSID, 0, sizeof(struct WLAN_802_11_SSID));
- wlan_scan_networks(priv, NULL);
- if (adapter->surpriseremoved)
- return -1;
- wait_event_interruptible(adapter->cmd_pending, !adapter->nr_cmd_pending);
- i = libertas_find_best_SSID_in_list(adapter, preferred_mode);
- if (i < 0) {
- ret = -1;
- goto out;
- }
- preqbssid = &adapter->scantable[i];
- memcpy(pSSID, &preqbssid->ssid,
- sizeof(struct WLAN_802_11_SSID));
- *out_mode = preqbssid->mode;
- if (!pSSID->ssidlength) {
- ret = -1;
- }
- out:
- LEAVE();
- 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 libertas_set_scan(struct net_device *dev, struct iw_request_info *info,
- struct iw_param *vwrq, char *extra)
- {
- wlan_private *priv = dev->priv;
- wlan_adapter *adapter = priv->adapter;
- union iwreq_data wrqu;
- ENTER();
- if (!wlan_scan_networks(priv, NULL)) {
- memset(&wrqu, 0, sizeof(union iwreq_data));
- wireless_send_event(priv->wlan_dev.netdev, SIOCGIWSCAN, &wrqu,
- NULL);
- }
- if (adapter->surpriseremoved)
- return -1;
- LEAVE();
- return 0;
- }
- /**
- * @brief Send a scan command for all available channels filtered on a spec
- *
- * @param priv A pointer to wlan_private structure
- * @param prequestedssid A pointer to AP's ssid
- * @param keeppreviousscan Flag used to save/clear scan table before scan
- *
- * @return 0-success, otherwise fail
- */
- int libertas_send_specific_SSID_scan(wlan_private * priv,
- struct WLAN_802_11_SSID *prequestedssid,
- u8 keeppreviousscan)
- {
- wlan_adapter *adapter = priv->adapter;
- struct wlan_ioctl_user_scan_cfg scancfg;
- ENTER();
- if (prequestedssid == NULL) {
- return -1;
- }
- memset(&scancfg, 0x00, sizeof(scancfg));
- memcpy(scancfg.specificSSID, prequestedssid->ssid,
- prequestedssid->ssidlength);
- scancfg.keeppreviousscan = keeppreviousscan;
- wlan_scan_networks(priv, &scancfg);
- if (adapter->surpriseremoved)
- return -1;
- wait_event_interruptible(adapter->cmd_pending, !adapter->nr_cmd_pending);
- LEAVE();
- return 0;
- }
- /**
- * @brief scan an AP with specific BSSID
- *
- * @param priv A pointer to wlan_private structure
- * @param bssid A pointer to AP's bssid
- * @param keeppreviousscan Flag used to save/clear scan table before scan
- *
- * @return 0-success, otherwise fail
- */
- int libertas_send_specific_BSSID_scan(wlan_private * priv, u8 * bssid, u8 keeppreviousscan)
- {
- struct wlan_ioctl_user_scan_cfg scancfg;
- ENTER();
- if (bssid == NULL) {
- return -1;
- }
- memset(&scancfg, 0x00, sizeof(scancfg));
- memcpy(scancfg.specificBSSID, bssid, sizeof(scancfg.specificBSSID));
- scancfg.keeppreviousscan = keeppreviousscan;
- wlan_scan_networks(priv, &scancfg);
- if (priv->adapter->surpriseremoved)
- return -1;
- wait_event_interruptible(priv->adapter->cmd_pending,
- !priv->adapter->nr_cmd_pending);
- LEAVE();
- return 0;
- }
- /**
- * @brief Retrieve the scan table entries via wireless tools IOCTL call
- *
- * @param dev A pointer to net_device structure
- * @param info A pointer to iw_request_info structure
- * @param dwrq A pointer to iw_point structure
- * @param extra A pointer to extra data buf
- *
- * @return 0 --success, otherwise fail
- */
- int libertas_get_scan(struct net_device *dev, struct iw_request_info *info,
- struct iw_point *dwrq, char *extra)
- {
- wlan_private *priv = dev->priv;
- wlan_adapter *adapter = priv->adapter;
- int ret = 0;
- char *current_ev = extra;
- char *end_buf = extra + IW_SCAN_MAX_DATA;
- struct chan_freq_power *cfp;
- struct bss_descriptor *pscantable;
- char *current_val; /* For rates */
- struct iw_event iwe; /* Temporary buffer */
- int i;
- int j;
- int rate;
- #define PERFECT_RSSI ((u8)50)
- #define WORST_RSSI ((u8)0)
- #define RSSI_DIFF ((u8)(PERFECT_RSSI - WORST_RSSI))
- u8 rssi;
- u8 buf[16 + 256 * 2];
- u8 *ptr;
- ENTER();
- /*
- * if there's either commands in the queue or one being
- * processed return -EAGAIN for iwlist to retry later.
- */
- if (adapter->nr_cmd_pending)
- return -EAGAIN;
- if (adapter->connect_status == libertas_connected)
- lbs_pr_debug(1, "Current ssid: %32s\n",
- adapter->curbssparams.ssid.ssid);
- lbs_pr_debug(1, "Scan: Get: numinscantable = %d\n",
- adapter->numinscantable);
- /* The old API using SIOCGIWAPLIST had a hard limit of IW_MAX_AP.
- * The new API using SIOCGIWSCAN is only limited by buffer size
- * WE-14 -> WE-16 the buffer is limited to IW_SCAN_MAX_DATA bytes
- * which is 4096.
- */
- for (i = 0; i < adapter->numinscantable; i++) {
- if ((current_ev + MAX_SCAN_CELL_SIZE) >= end_buf) {
- lbs_pr_debug(1, "i=%d break out: current_ev=%p end_buf=%p "
- "MAX_SCAN_CELL_SIZE=%zd\n",
- i, current_ev, end_buf, MAX_SCAN_CELL_SIZE);
- break;
- }
- pscantable = &adapter->scantable[i];
- lbs_pr_debug(1, "i=%d ssid: %32s\n", i, pscantable->ssid.ssid);
- cfp =
- libertas_find_cfp_by_band_and_channel(adapter, 0,
- pscantable->channel);
- if (!cfp) {
- lbs_pr_debug(1, "Invalid channel number %d\n",
- pscantable->channel);
- continue;
- }
- if (!ssid_valid(&adapter->scantable[i].ssid)) {
- continue;
- }
- /* First entry *MUST* be the AP MAC address */
- iwe.cmd = SIOCGIWAP;
- iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
- memcpy(iwe.u.ap_addr.sa_data,
- &adapter->scantable[i].macaddress, ETH_ALEN);
- iwe.len = IW_EV_ADDR_LEN;
- current_ev =
- iwe_stream_add_event(current_ev, end_buf, &iwe, iwe.len);
- //Add the ESSID
- iwe.u.data.length = adapter->scantable[i].ssid.ssidlength;
- if (iwe.u.data.length > 32) {
- iwe.u.data.length = 32;
- }
- iwe.cmd = SIOCGIWESSID;
- iwe.u.data.flags = 1;
- iwe.len = IW_EV_POINT_LEN + iwe.u.data.length;
- current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
- adapter->scantable[i].ssid.
- ssid);
- //Add mode
- iwe.cmd = SIOCGIWMODE;
- iwe.u.mode = adapter->scantable[i].mode;
- iwe.len = IW_EV_UINT_LEN;
- current_ev =
- iwe_stream_add_event(current_ev, end_buf, &iwe, iwe.len);
- //frequency
- iwe.cmd = SIOCGIWFREQ;
- iwe.u.freq.m = (long)cfp->freq * 100000;
- iwe.u.freq.e = 1;
- iwe.len = IW_EV_FREQ_LEN;
- current_ev =
- iwe_stream_add_event(current_ev, end_buf, &iwe, iwe.len);
- /* Add quality statistics */
- iwe.cmd = IWEVQUAL;
- iwe.u.qual.updated = IW_QUAL_ALL_UPDATED;
- iwe.u.qual.level = SCAN_RSSI(adapter->scantable[i].rssi);
- rssi = iwe.u.qual.level - MRVDRV_NF_DEFAULT_SCAN_VALUE;
- iwe.u.qual.qual =
- (100 * RSSI_DIFF * RSSI_DIFF - (PERFECT_RSSI - rssi) *
- (15 * (RSSI_DIFF) + 62 * (PERFECT_RSSI - rssi))) /
- (RSSI_DIFF * RSSI_DIFF);
- if (iwe.u.qual.qual > 100)
- iwe.u.qual.qual = 100;
- else if (iwe.u.qual.qual < 1)
- iwe.u.qual.qual = 0;
- if (adapter->NF[TYPE_BEACON][TYPE_NOAVG] == 0) {
- iwe.u.qual.noise = MRVDRV_NF_DEFAULT_SCAN_VALUE;
- } else {
- iwe.u.qual.noise =
- CAL_NF(adapter->NF[TYPE_BEACON][TYPE_NOAVG]);
- }
- if ((adapter->mode == IW_MODE_ADHOC) &&
- !libertas_SSID_cmp(&adapter->curbssparams.ssid,
- &adapter->scantable[i].ssid)
- && adapter->adhoccreate) {
- ret = libertas_prepare_and_send_command(priv,
- cmd_802_11_rssi,
- 0,
- cmd_option_waitforrsp,
- 0, NULL);
- if (!ret) {
- iwe.u.qual.level =
- CAL_RSSI(adapter->SNR[TYPE_RXPD][TYPE_AVG] /
- AVG_SCALE,
- adapter->NF[TYPE_RXPD][TYPE_AVG] /
- AVG_SCALE);
- }
- }
- iwe.len = IW_EV_QUAL_LEN;
- current_ev =
- iwe_stream_add_event(current_ev, end_buf, &iwe, iwe.len);
- /* Add encryption capability */
- iwe.cmd = SIOCGIWENCODE;
- if (adapter->scantable[i].privacy) {
- iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
- } else {
- iwe.u.data.flags = IW_ENCODE_DISABLED;
- }
- iwe.u.data.length = 0;
- iwe.len = IW_EV_POINT_LEN + iwe.u.data.length;
- current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
- adapter->scantable->ssid.
- ssid);
- current_val = current_ev + IW_EV_LCP_LEN;
- iwe.cmd = SIOCGIWRATE;
- iwe.u.bitrate.fixed = 0;
- iwe.u.bitrate.disabled = 0;
- iwe.u.bitrate.value = 0;
- /* Bit rate given in 500 kb/s units (+ 0x80) */
- for (j = 0; j < sizeof(adapter->scantable[i].libertas_supported_rates);
- j++) {
- if (adapter->scantable[i].libertas_supported_rates[j] == 0) {
- break;
- }
- rate =
- (adapter->scantable[i].libertas_supported_rates[j] & 0x7F) *
- 500000;
- if (rate > iwe.u.bitrate.value) {
- iwe.u.bitrate.value = rate;
- }
- iwe.u.bitrate.value =
- (adapter->scantable[i].libertas_supported_rates[j]
- & 0x7f) * 500000;
- iwe.len = IW_EV_PARAM_LEN;
- current_ev =
- iwe_stream_add_value(current_ev, current_val,
- end_buf, &iwe, iwe.len);
- }
- if ((adapter->scantable[i].mode == IW_MODE_ADHOC)
- && !libertas_SSID_cmp(&adapter->curbssparams.ssid,
- &adapter->scantable[i].ssid)
- && adapter->adhoccreate) {
- iwe.u.bitrate.value = 22 * 500000;
- }
- iwe.len = IW_EV_PARAM_LEN;
- current_ev =
- iwe_stream_add_value(current_ev, current_val, end_buf, &iwe,
- iwe.len);
- /* Add new value to event */
- current_val = current_ev + IW_EV_LCP_LEN;
- if (adapter->scantable[i].rsn_ie[0] == WPA2_IE) {
- memset(&iwe, 0, sizeof(iwe));
- memset(buf, 0, sizeof(buf));
- memcpy(buf, adapter->scantable[i].rsn_ie,
- adapter->scantable[i].rsn_ie_len);
- iwe.cmd = IWEVGENIE;
- iwe.u.data.length = adapter->scantable[i].rsn_ie_len;
- iwe.len = IW_EV_POINT_LEN + iwe.u.data.length;
- current_ev = iwe_stream_add_point(current_ev, end_buf,
- &iwe, buf);
- }
- if (adapter->scantable[i].wpa_ie[0] == WPA_IE) {
- memset(&iwe, 0, sizeof(iwe));
- memset(buf, 0, sizeof(buf));
- memcpy(buf, adapter->scantable[i].wpa_ie,
- adapter->scantable[i].wpa_ie_len);
- iwe.cmd = IWEVGENIE;
- iwe.u.data.length = adapter->scantable[i].wpa_ie_len;
- iwe.len = IW_EV_POINT_LEN + iwe.u.data.length;
- current_ev = iwe_stream_add_point(current_ev, end_buf,
- &iwe, buf);
- }
- if (adapter->scantable[i].extra_ie != 0) {
- memset(&iwe, 0, sizeof(iwe));
- memset(buf, 0, sizeof(buf));
- ptr = buf;
- ptr += sprintf(ptr, "extra_ie");
- iwe.u.data.length = strlen(buf);
- lbs_pr_debug(1, "iwe.u.data.length %d\n",
- iwe.u.data.length);
- lbs_pr_debug(1, "BUF: %s \n", buf);
- iwe.cmd = IWEVCUSTOM;
- iwe.len = IW_EV_POINT_LEN + iwe.u.data.length;
- current_ev =
- iwe_stream_add_point(current_ev, end_buf, &iwe,
- buf);
- }
- current_val = current_ev + IW_EV_LCP_LEN;
- /*
- * Check if we added any event
- */
- if ((current_val - current_ev) > IW_EV_LCP_LEN)
- current_ev = current_val;
- }
- dwrq->length = (current_ev - extra);
- dwrq->flags = 0;
- LEAVE();
- return 0;
- }
- /**
- * @brief Prepare a scan command to be sent to the firmware
- *
- * Use the wlan_scan_cmd_config sent to the command processing module in
- * the libertas_prepare_and_send_command to configure a cmd_ds_802_11_scan command
- * struct to send to firmware.
- *
- * The fixed fields specifying the BSS type and BSSID filters as well as a
- * variable number/length of TLVs are sent in the command to firmware.
- *
- * @param priv A pointer to wlan_private structure
- * @param cmd A pointer to cmd_ds_command structure to be sent to
- * firmware with the cmd_DS_801_11_SCAN structure
- * @param pdata_buf Void pointer cast of a wlan_scan_cmd_config struct used
- * to set the fields/TLVs for the command sent to firmware
- *
- * @return 0 or -1
- *
- * @sa wlan_scan_create_channel_list
- */
- int libertas_cmd_80211_scan(wlan_private * priv,
- struct cmd_ds_command *cmd, void *pdata_buf)
- {
- struct cmd_ds_802_11_scan *pscan = &cmd->params.scan;
- struct wlan_scan_cmd_config *pscancfg;
- ENTER();
- pscancfg = pdata_buf;
- /* Set fixed field variables in scan command */
- pscan->bsstype = pscancfg->bsstype;
- memcpy(pscan->BSSID, pscancfg->specificBSSID, sizeof(pscan->BSSID));
- 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)
- + sizeof(pscan->BSSID)
- + pscancfg->tlvbufferlen + S_DS_GEN);
- lbs_pr_debug(1, "SCAN_CMD: command=%x, size=%x, seqnum=%x\n",
- cmd->command, cmd->size, cmd->seqnum);
- LEAVE();
- return 0;
- }
- /**
- * @brief This function handles the command response of scan
- *
- * The response buffer for the scan command has the following
- * memory layout:
- *
- * .-----------------------------------------------------------.
- * | header (4 * sizeof(u16)): Standard command response hdr |
- * .-----------------------------------------------------------.
- * | bufsize (u16) : sizeof the BSS Description data |
- * .-----------------------------------------------------------.
- * | NumOfSet (u8) : Number of BSS Descs returned |
- * .-----------------------------------------------------------.
- * | BSSDescription data (variable, size given in bufsize) |
- * .-----------------------------------------------------------.
- * | TLV data (variable, size calculated using header->size, |
- * | bufsize and sizeof the fixed fields above) |
- * .-----------------------------------------------------------.
- *
- * @param priv A pointer to wlan_private structure
- * @param resp A pointer to cmd_ds_command
- *
- * @return 0 or -1
- */
- int libertas_ret_80211_scan(wlan_private * priv, struct cmd_ds_command *resp)
- {
- wlan_adapter *adapter = priv->adapter;
- struct cmd_ds_802_11_scan_rsp *pscan;
- struct bss_descriptor newbssentry;
- struct mrvlietypes_data *ptlv;
- struct mrvlietypes_tsftimestamp *ptsftlv;
- u8 *pbssinfo;
- u16 scanrespsize;
- int bytesleft;
- int numintable;
- int bssIdx;
- int idx;
- int tlvbufsize;
- u64 tsfval;
- ENTER();
- pscan = &resp->params.scanresp;
- if (pscan->nr_sets > MRVDRV_MAX_BSSID_LIST) {
- lbs_pr_debug(1,
- "SCAN_RESP: Invalid number of AP returned (%d)!!\n",
- pscan->nr_sets);
- LEAVE();
- return -1;
- }
- bytesleft = le16_to_cpu(pscan->bssdescriptsize);
- lbs_pr_debug(1, "SCAN_RESP: bssdescriptsize %d\n", bytesleft);
- scanrespsize = le16_to_cpu(resp->size);
- lbs_pr_debug(1, "SCAN_RESP: returned %d AP before parsing\n",
- pscan->nr_sets);
- numintable = adapter->numinscantable;
- pbssinfo = pscan->bssdesc_and_tlvbuffer;
- /* The size of the TLV buffer is equal to the entire command response
- * size (scanrespsize) minus the fixed fields (sizeof()'s), the
- * BSS Descriptions (bssdescriptsize as bytesLef) and the command
- * response header (S_DS_GEN)
- */
- tlvbufsize = scanrespsize - (bytesleft + sizeof(pscan->bssdescriptsize)
- + sizeof(pscan->nr_sets)
- + S_DS_GEN);
- ptlv = (struct mrvlietypes_data *) (pscan->bssdesc_and_tlvbuffer + bytesleft);
- /* Search the TLV buffer space in the scan response for any valid TLVs */
- wlan_ret_802_11_scan_get_tlv_ptrs(ptlv, tlvbufsize, &ptsftlv);
- /*
- * Process each scan response returned (pscan->nr_sets). Save
- * the information in the newbssentry and then insert into the
- * driver scan table either as an update to an existing entry
- * or as an addition at the end of the table
- */
- for (idx = 0; idx < pscan->nr_sets && bytesleft; idx++) {
- /* Zero out the newbssentry we are about to store info in */
- memset(&newbssentry, 0x00, sizeof(newbssentry));
- /* Process the data fields and IEs returned for this BSS */
- if ((InterpretBSSDescriptionWithIE(&newbssentry,
- &pbssinfo,
- &bytesleft) ==
- 0)
- && CHECK_SSID_IS_VALID(&newbssentry.ssid)) {
- lbs_pr_debug(1,
- "SCAN_RESP: BSSID = %02x:%02x:%02x:%02x:%02x:%02x\n",
- newbssentry.macaddress[0],
- newbssentry.macaddress[1],
- newbssentry.macaddress[2],
- newbssentry.macaddress[3],
- newbssentry.macaddress[4],
- newbssentry.macaddress[5]);
- /*
- * Search the scan table for the same bssid
- */
- for (bssIdx = 0; bssIdx < numintable; bssIdx++) {
- if (memcmp(newbssentry.macaddress,
- adapter->scantable[bssIdx].
- macaddress,
- sizeof(newbssentry.macaddress)) ==
- 0) {
- /*
- * If the SSID matches as well, it is a duplicate of
- * this entry. Keep the bssIdx set to this
- * entry so we replace the old contents in the table
- */
- if ((newbssentry.ssid.ssidlength ==
- adapter->scantable[bssIdx].ssid.
- ssidlength)
- &&
- (memcmp
- (newbssentry.ssid.ssid,
- adapter->scantable[bssIdx].ssid.
- ssid,
- newbssentry.ssid.ssidlength) ==
- 0)) {
- lbs_pr_debug(1,
- "SCAN_RESP: Duplicate of index: %d\n",
- bssIdx);
- break;
- }
- }
- }
- /*
- * If the bssIdx is equal to the number of entries in the table,
- * the new entry was not a duplicate; append it to the scan
- * table
- */
- if (bssIdx == numintable) {
- /* Range check the bssIdx, keep it limited to the last entry */
- if (bssIdx == MRVDRV_MAX_BSSID_LIST) {
- bssIdx--;
- } else {
- numintable++;
- }
- }
- /*
- * If the TSF TLV was appended to the scan results, save the
- * this entries TSF value in the networktsf field. The
- * networktsf is the firmware's TSF value at the time the
- * beacon or probe response was received.
- */
- if (ptsftlv) {
- memcpy(&tsfval, &ptsftlv->tsftable[idx],
- sizeof(tsfval));
- tsfval = le64_to_cpu(tsfval);
- memcpy(&newbssentry.networktsf,
- &tsfval, sizeof(newbssentry.networktsf));
- }
- /* Copy the locally created newbssentry to the scan table */
- memcpy(&adapter->scantable[bssIdx],
- &newbssentry,
- sizeof(adapter->scantable[bssIdx]));
- } else {
- /* error parsing/interpreting the scan response, skipped */
- lbs_pr_debug(1, "SCAN_RESP: "
- "InterpretBSSDescriptionWithIE returned ERROR\n");
- }
- }
- lbs_pr_debug(1, "SCAN_RESP: Scanned %2d APs, %d valid, %d total\n",
- pscan->nr_sets, numintable - adapter->numinscantable,
- numintable);
- /* Update the total number of BSSIDs in the scan table */
- adapter->numinscantable = numintable;
- LEAVE();
- return 0;
- }
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