diff options
Diffstat (limited to 'drivers/net/wireless/libertas/scan.c')
| -rw-r--r-- | drivers/net/wireless/libertas/scan.c | 2005 |
1 files changed, 0 insertions, 2005 deletions
diff --git a/drivers/net/wireless/libertas/scan.c b/drivers/net/wireless/libertas/scan.c deleted file mode 100644 index 3c0b1a2a172..00000000000 --- a/drivers/net/wireless/libertas/scan.c +++ /dev/null @@ -1,2005 +0,0 @@ -/** - * 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; -} |