diff options
Diffstat (limited to 'drivers/net/wireless/libertas/scan.c')
| -rw-r--r-- | drivers/net/wireless/libertas/scan.c | 1871 |
1 files changed, 0 insertions, 1871 deletions
diff --git a/drivers/net/wireless/libertas/scan.c b/drivers/net/wireless/libertas/scan.c deleted file mode 100644 index ad1e67d984c..00000000000 --- a/drivers/net/wireless/libertas/scan.c +++ /dev/null @@ -1,1871 +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 <linux/etherdevice.h> - -#include <net/ieee80211.h> -#include <net/iw_handler.h> - -#include <asm/unaligned.h> - -#include "host.h" -#include "decl.h" -#include "dev.h" -#include "scan.h" -#include "join.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 - -static const u8 zeromac[ETH_ALEN] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; -static const u8 bcastmac[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }; - - - - -/*********************************************************************/ -/* */ -/* Misc helper functions */ -/* */ -/*********************************************************************/ - -static inline void clear_bss_descriptor (struct bss_descriptor * bss) -{ - /* Don't blow away ->list, just BSS data */ - memset(bss, 0, offsetof(struct bss_descriptor, list)); -} - -static inline int match_bss_no_security(struct wlan_802_11_security * secinfo, - struct bss_descriptor * match_bss) -{ - if ( !secinfo->wep_enabled - && !secinfo->WPAenabled - && !secinfo->WPA2enabled - && match_bss->wpa_ie[0] != MFIE_TYPE_GENERIC - && match_bss->rsn_ie[0] != MFIE_TYPE_RSN - && !(match_bss->capability & WLAN_CAPABILITY_PRIVACY)) { - return 1; - } - return 0; -} - -static inline int match_bss_static_wep(struct wlan_802_11_security * secinfo, - struct bss_descriptor * match_bss) -{ - if ( secinfo->wep_enabled - && !secinfo->WPAenabled - && !secinfo->WPA2enabled - && (match_bss->capability & WLAN_CAPABILITY_PRIVACY)) { - return 1; - } - return 0; -} - -static inline int match_bss_wpa(struct wlan_802_11_security * secinfo, - struct bss_descriptor * match_bss) -{ - if ( !secinfo->wep_enabled - && secinfo->WPAenabled - && (match_bss->wpa_ie[0] == MFIE_TYPE_GENERIC) - /* privacy bit may NOT be set in some APs like LinkSys WRT54G - && (match_bss->capability & WLAN_CAPABILITY_PRIVACY)) { - */ - ) { - return 1; - } - return 0; -} - -static inline int match_bss_wpa2(struct wlan_802_11_security * secinfo, - struct bss_descriptor * match_bss) -{ - if ( !secinfo->wep_enabled - && secinfo->WPA2enabled - && (match_bss->rsn_ie[0] == MFIE_TYPE_RSN) - /* privacy bit may NOT be set in some APs like LinkSys WRT54G - && (match_bss->capability & WLAN_CAPABILITY_PRIVACY)) { - */ - ) { - return 1; - } - return 0; -} - -static inline int match_bss_dynamic_wep(struct wlan_802_11_security * secinfo, - struct bss_descriptor * match_bss) -{ - if ( !secinfo->wep_enabled - && !secinfo->WPAenabled - && !secinfo->WPA2enabled - && (match_bss->wpa_ie[0] != MFIE_TYPE_GENERIC) - && (match_bss->rsn_ie[0] != MFIE_TYPE_RSN) - && (match_bss->capability & WLAN_CAPABILITY_PRIVACY)) { - return 1; - } - return 0; -} - -/** - * @brief Check if a scanned network compatible with the driver settings - * - * WEP WPA WPA2 ad-hoc encrypt Network - * enabled enabled enabled AES mode privacy WPA WPA2 Compatible - * 0 0 0 0 NONE 0 0 0 yes No security - * 1 0 0 0 NONE 1 0 0 yes Static WEP - * 0 1 0 0 x 1x 1 x yes WPA - * 0 0 1 0 x 1x x 1 yes WPA2 - * 0 0 0 1 NONE 1 0 0 yes Ad-hoc AES - * 0 0 0 0 !=NONE 1 0 0 yes Dynamic WEP - * - * - * @param 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, - struct bss_descriptor * bss, u8 mode) -{ - int matched = 0; - - lbs_deb_enter(LBS_DEB_SCAN); - - if (bss->mode != mode) - goto done; - - if ((matched = match_bss_no_security(&adapter->secinfo, bss))) { - goto done; - } else if ((matched = match_bss_static_wep(&adapter->secinfo, bss))) { - goto done; - } else if ((matched = match_bss_wpa(&adapter->secinfo, bss))) { - lbs_deb_scan( - "is_network_compatible() WPA: wpa_ie=%#x " - "wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s " - "privacy=%#x\n", bss->wpa_ie[0], bss->rsn_ie[0], - adapter->secinfo.wep_enabled ? "e" : "d", - adapter->secinfo.WPAenabled ? "e" : "d", - adapter->secinfo.WPA2enabled ? "e" : "d", - (bss->capability & WLAN_CAPABILITY_PRIVACY)); - goto done; - } else if ((matched = match_bss_wpa2(&adapter->secinfo, bss))) { - lbs_deb_scan( - "is_network_compatible() WPA2: wpa_ie=%#x " - "wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s " - "privacy=%#x\n", bss->wpa_ie[0], bss->rsn_ie[0], - adapter->secinfo.wep_enabled ? "e" : "d", - adapter->secinfo.WPAenabled ? "e" : "d", - adapter->secinfo.WPA2enabled ? "e" : "d", - (bss->capability & WLAN_CAPABILITY_PRIVACY)); - goto done; - } else if ((matched = match_bss_dynamic_wep(&adapter->secinfo, bss))) { - lbs_deb_scan( - "is_network_compatible() dynamic WEP: " - "wpa_ie=%#x wpa2_ie=%#x privacy=%#x\n", - bss->wpa_ie[0], bss->rsn_ie[0], - (bss->capability & WLAN_CAPABILITY_PRIVACY)); - goto done; - } - - /* bss security settings don't match those configured on card */ - lbs_deb_scan( - "is_network_compatible() FAILED: wpa_ie=%#x " - "wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s privacy=%#x\n", - bss->wpa_ie[0], bss->rsn_ie[0], - adapter->secinfo.wep_enabled ? "e" : "d", - adapter->secinfo.WPAenabled ? "e" : "d", - adapter->secinfo.WPA2enabled ? "e" : "d", - (bss->capability & WLAN_CAPABILITY_PRIVACY)); - -done: - lbs_deb_leave_args(LBS_DEB_SCAN, "matched: %d", matched); - return matched; -} - -/** - * @brief Compare two SSIDs - * - * @param ssid1 A pointer to ssid to compare - * @param ssid2 A pointer to ssid to compare - * - * @return 0--ssid is same, otherwise is different - */ -int libertas_ssid_cmp(u8 *ssid1, u8 ssid1_len, u8 *ssid2, u8 ssid2_len) -{ - if (ssid1_len != ssid2_len) - return -1; - - return memcmp(ssid1, ssid2, ssid1_len); -} - - - - -/*********************************************************************/ -/* */ -/* Main scanning support */ -/* */ -/*********************************************************************/ - - -/** - * @brief Create a channel list for the driver to scan based on region info - * - * Only used from wlan_scan_setup_scan_config() - * - * 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; - - lbs_deb_enter_args(LBS_DEB_SCAN, "filteredscan %d", filteredscan); - - 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 = CMD_SCAN_TYPE_ACTIVE; - - 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; - } - } - } -} - - -/* Delayed partial scan worker */ -void libertas_scan_worker(struct work_struct *work) -{ - wlan_private *priv = container_of(work, wlan_private, scan_work.work); - - wlan_scan_networks(priv, NULL, 0); -} - - -/** - * @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) -{ - struct mrvlietypes_numprobes *pnumprobestlv; - struct mrvlietypes_ssidparamset *pssidtlv; - struct wlan_scan_cmd_config * pscancfgout = NULL; - u8 *ptlvpos; - u16 numprobes; - int chanidx; - int scantype; - int scandur; - int channel; - int radiotype; - - lbs_deb_enter(LBS_DEB_SCAN); - - pscancfgout = kzalloc(MAX_SCAN_CFG_ALLOC, GFP_KERNEL); - if (pscancfgout == NULL) - goto out; - - /* The tlvbufferlen is calculated for each scan command. The TLVs added - * in this routine will be preserved since the routine that sends - * the command will append channelTLVs at *ppchantlvout. The difference - * between the *ppchantlvout and the tlvbuffer start will be used - * to calculate the size of anything we add in this routine. - */ - pscancfgout->tlvbufferlen = 0; - - /* Running tlv pointer. Assigned to ppchantlvout at end of function - * so later routines know where channels can be added to the command buf - */ - ptlvpos = pscancfgout->tlvbuffer; - - /* - * Set the initial scan paramters for progressive scanning. If a specific - * BSSID or SSID is used, the number of channels in the scan command - * will be increased to the absolute maximum - */ - *pmaxchanperscan = MRVDRV_CHANNELS_PER_SCAN_CMD; - - /* Initialize the scan as un-filtered by firmware, set to TRUE below if - * a SSID or BSSID filter is sent in the command - */ - *pfilteredscan = 0; - - /* Initialize the scan as not being only on the current channel. If - * the channel list is customized, only contains one channel, and - * is the active channel, this is set true and data flow is not halted. - */ - *pscancurrentonly = 0; - - if (puserscanin) { - /* Set the bss type scan filter, use adapter setting if unset */ - pscancfgout->bsstype = - puserscanin->bsstype ? puserscanin->bsstype : CMD_BSS_TYPE_ANY; - - /* Set the number of probes to send, use adapter setting if unset */ - numprobes = puserscanin->numprobes ? puserscanin->numprobes : 0; - - /* - * Set the BSSID filter to the incoming configuration, - * if non-zero. If not set, it will remain disabled (all zeros). - */ - memcpy(pscancfgout->bssid, puserscanin->bssid, - sizeof(pscancfgout->bssid)); - - if (puserscanin->ssid_len) { - pssidtlv = - (struct mrvlietypes_ssidparamset *) pscancfgout-> - tlvbuffer; - pssidtlv->header.type = cpu_to_le16(TLV_TYPE_SSID); - pssidtlv->header.len = cpu_to_le16(puserscanin->ssid_len); - memcpy(pssidtlv->ssid, puserscanin->ssid, - puserscanin->ssid_len); - ptlvpos += sizeof(pssidtlv->header) + puserscanin->ssid_len; - } - - /* - * The default number of channels sent in the command is low to - * ensure the response buffer from the firmware does not truncate - * scan results. That is not an issue with an SSID or BSSID - * filter applied to the scan results in the firmware. - */ - if ( puserscanin->ssid_len - || (compare_ether_addr(pscancfgout->bssid, &zeromac[0]) != 0)) { - *pmaxchanperscan = MRVDRV_MAX_CHANNELS_PER_SCAN; - *pfilteredscan = 1; - } - } else { - pscancfgout->bsstype = CMD_BSS_TYPE_ANY; - numprobes = 0; - } - - /* 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 = cpu_to_le16(2); - pnumprobestlv->numprobes = cpu_to_le16(numprobes); - - ptlvpos += sizeof(*pnumprobestlv); - } - - /* - * 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) { - /* Create a default channel scan list */ - lbs_deb_scan("creating full region channel list\n"); - wlan_scan_create_channel_list(priv, pscanchanlist, - *pfilteredscan); - goto out; - } - - 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_deb_scan("scanning current channel only"); - } - -out: - return pscancfgout; -} - -/** - * @brief Construct and send multiple scan config commands to the firmware - * - * Only used from wlan_scan_networks() - * - * 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, - const struct wlan_ioctl_user_scan_cfg * puserscanin, - int full_scan) -{ - struct chanscanparamset *ptmpchan; - struct chanscanparamset *pstartchan; - u8 scanband; - int doneearly; - int tlvidx; - int ret = 0; - int scanned = 0; - union iwreq_data wrqu; - - lbs_deb_enter_args(LBS_DEB_SCAN, "maxchanperscan %d, filteredscan %d, " - "full_scan %d", maxchanperscan, filteredscan, full_scan); - - if (!pscancfgout || !pchantlvout || !pscanchanlist) { - lbs_deb_scan("pscancfgout, pchantlvout or " - "pscanchanlist is NULL\n"); - ret = -1; - goto out; - } - - pchantlvout->header.type = cpu_to_le16(TLV_TYPE_CHANLIST); - - /* Set the temp channel struct pointer to the start of the desired list */ - ptmpchan = pscanchanlist; - - if (priv->adapter->last_scanned_channel && !puserscanin) - ptmpchan += priv->adapter->last_scanned_channel; - - /* Loop through the desired channel list, sending a new firmware scan - * commands for each maxchanperscan channels (or for 1,6,11 individually - * if configured accordingly) - */ - while (ptmpchan->channumber) { - - tlvidx = 0; - pchantlvout->header.len = 0; - scanband = ptmpchan->radiotype; - pstartchan = ptmpchan; - doneearly = 0; - - /* Construct the channel TLV for the scan command. Continue to - * insert channel TLVs until: - * - the tlvidx hits the maximum configured per scan command - * - the next channel to insert is 0 (end of desired channel list) - * - doneearly is set (controlling individual scanning of 1,6,11) - */ - while (tlvidx < maxchanperscan && ptmpchan->channumber - && !doneearly && scanned < 2) { - - lbs_deb_scan("channel %d, radio %d, passive %d, " - "dischanflt %d, maxscantime %d\n", - ptmpchan->channumber, - ptmpchan->radiotype, - ptmpchan->chanscanmode.passivescan, - ptmpchan->chanscanmode.disablechanfilt, - ptmpchan->maxscantime); - - /* Copy the current channel TLV to the command being prepared */ - memcpy(pchantlvout->chanscanparam + tlvidx, - ptmpchan, sizeof(pchantlvout->chanscanparam)); - - /* Increment the TLV header length by the size appended */ - /* Ew, it would be _so_ nice if we could just declare the - variable little-endian and let GCC handle it for us */ - pchantlvout->header.len = - cpu_to_le16(le16_to_cpu(pchantlvout->header.len) + - sizeof(pchantlvout->chanscanparam)); - - /* - * The tlv buffer length is set to the number of bytes of the - * between the channel tlv pointer and the start of the - * tlv buffer. This compensates for any TLVs that were appended - * before the channel list. - */ - pscancfgout->tlvbufferlen = ((u8 *) pchantlvout - - pscancfgout->tlvbuffer); - - /* Add the size of the channel tlv header and the data length */ - pscancfgout->tlvbufferlen += - (sizeof(pchantlvout->header) - + le16_to_cpu(pchantlvout->header.len)); - - /* Increment the index to the channel tlv we are constructing */ - tlvidx++; - - doneearly = 0; - - /* Stop the loop if the *current* channel is in the 1,6,11 set - * and we are not filtering on a BSSID or SSID. - */ - if (!filteredscan && (ptmpchan->channumber == 1 - || ptmpchan->channumber == 6 - || ptmpchan->channumber == 11)) { - doneearly = 1; - } - - /* Increment the tmp pointer to the next channel to be scanned */ - ptmpchan++; - scanned++; - - /* Stop the loop if the *next* channel is in the 1,6,11 set. - * This will cause it to be the only channel scanned on the next - * interation - */ - if (!filteredscan && (ptmpchan->channumber == 1 - || ptmpchan->channumber == 6 - || ptmpchan->channumber == 11)) { - doneearly = 1; - } - } - - /* Send the scan command to the firmware with the specified cfg */ - ret = libertas_prepare_and_send_command(priv, CMD_802_11_SCAN, 0, - 0, 0, pscancfgout); - if (scanned >= 2 && !full_scan) { - ret = 0; - goto done; - } - scanned = 0; - } - -done: - priv->adapter->last_scanned_channel = ptmpchan->channumber; - - if (priv->adapter->last_scanned_channel) { - /* Schedule the next part of the partial scan */ - if (!full_scan && !priv->adapter->surpriseremoved) { - cancel_delayed_work(&priv->scan_work); - queue_delayed_work(priv->work_thread, &priv->scan_work, - msecs_to_jiffies(300)); - } - } else { - /* All done, tell userspace the scan table has been updated */ - memset(&wrqu, 0, sizeof(union iwreq_data)); - wireless_send_event(priv->dev, SIOCGIWSCAN, &wrqu, NULL); - } - -out: - lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret); - return ret; -} - -/* - * Only used from wlan_scan_networks() -*/ -static void clear_selected_scan_list_entries(wlan_adapter *adapter, - const struct wlan_ioctl_user_scan_cfg *scan_cfg) -{ - struct bss_descriptor *bss; - struct bss_descriptor *safe; - u32 clear_ssid_flag = 0, clear_bssid_flag = 0; - - lbs_deb_enter(LBS_DEB_SCAN); - - if (!scan_cfg) - goto out; - - if (scan_cfg->clear_ssid && scan_cfg->ssid_len) - clear_ssid_flag = 1; - - if (scan_cfg->clear_bssid - && (compare_ether_addr(scan_cfg->bssid, &zeromac[0]) != 0) - && (compare_ether_addr(scan_cfg->bssid, &bcastmac[0]) != 0)) { - clear_bssid_flag = 1; - } - - if (!clear_ssid_flag && !clear_bssid_flag) - goto out; - - mutex_lock(&adapter->lock); - list_for_each_entry_safe (bss, safe, &adapter->network_list, list) { - u32 clear = 0; - - /* Check for an SSID match */ - if ( clear_ssid_flag - && (bss->ssid_len == scan_cfg->ssid_len) - && !memcmp(bss->ssid, scan_cfg->ssid, bss->ssid_len)) - clear = 1; - - /* Check for a BSSID match */ - if ( clear_bssid_flag - && !compare_ether_addr(bss->bssid, scan_cfg->bssid)) - clear = 1; - - if (clear) { - list_move_tail (&bss->list, &adapter->network_free_list); - clear_bss_descriptor(bss); - } - } - mutex_unlock(&adapter->lock); -out: - lbs_deb_leave(LBS_DEB_SCAN); -} - - -/** - * @brief Internal function used to start a scan based on an input config - * - * Also used from debugfs - * - * Use the input user scan configuration information when provided in - * order to send the appropriate scan commands to firmware to populate or - * update the internal driver scan table - * - * @param priv A pointer to wlan_private structure - * @param puserscanin Pointer to the input configuration for the requested - * scan. - * @param full_scan ??? - * - * @return 0 or < 0 if error - */ -int wlan_scan_networks(wlan_private * priv, - const struct wlan_ioctl_user_scan_cfg * puserscanin, - int full_scan) -{ - wlan_adapter * adapter = priv->adapter; - struct mrvlietypes_chanlistparamset *pchantlvout; - struct chanscanparamset * scan_chan_list = NULL; - struct wlan_scan_cmd_config * scan_cfg = NULL; - u8 filteredscan; - u8 scancurrentchanonly; - int maxchanperscan; - int ret; -#ifdef CONFIG_LIBERTAS_DEBUG - struct bss_descriptor * iter_bss; - int i = 0; - DECLARE_MAC_BUF(mac); -#endif - - lbs_deb_enter_args(LBS_DEB_SCAN, "full_scan %d", full_scan); - - /* Cancel any partial outstanding partial scans if this scan - * is a full scan. - */ - if (full_scan && delayed_work_pending(&priv->scan_work)) - cancel_delayed_work(&priv->scan_work); - - 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; - } - - clear_selected_scan_list_entries(adapter, puserscanin); - - /* Keep the data path active if we are only scanning our current channel */ - if (!scancurrentchanonly) { - netif_stop_queue(priv->dev); - netif_carrier_off(priv->dev); - if (priv->mesh_dev) { - netif_stop_queue(priv->mesh_dev); - netif_carrier_off(priv->mesh_dev); - } - } - - ret = wlan_scan_channel_list(priv, - maxchanperscan, - filteredscan, - scan_cfg, - pchantlvout, - scan_chan_list, - puserscanin, - full_scan); - -#ifdef CONFIG_LIBERTAS_DEBUG - /* Dump the scan table */ - mutex_lock(&adapter->lock); - lbs_deb_scan("The scan table contains:\n"); - list_for_each_entry (iter_bss, &adapter->network_list, list) { - lbs_deb_scan("scan %02d, %s, RSSI, %d, SSID '%s'\n", - i++, print_mac(mac, iter_bss->bssid), (s32) iter_bss->rssi, - escape_essid(iter_bss->ssid, iter_bss->ssid_len)); - } - mutex_unlock(&adapter->lock); -#endif - - if (priv->adapter->connect_status == LIBERTAS_CONNECTED) { - netif_carrier_on(priv->dev); - netif_wake_queue(priv->dev); - if (priv->mesh_dev) { - netif_carrier_on(priv->mesh_dev); - netif_wake_queue(priv->mesh_dev); - } - } - -out: - if (scan_cfg) - kfree(scan_cfg); - - if (scan_chan_list) - kfree(scan_chan_list); - - lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret); - return ret; -} - -/** - * @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 bss Output parameter: Pointer to the BSS Entry - * - * @return 0 or -1 - */ -static int libertas_process_bss(struct bss_descriptor * bss, - u8 ** pbeaconinfo, int *bytesleft) -{ - struct ieeetypes_fhparamset *pFH; - struct ieeetypes_dsparamset *pDS; - struct ieeetypes_cfparamset *pCF; - struct ieeetypes_ibssparamset *pibss; - DECLARE_MAC_BUF(mac); - struct ieeetypes_countryinfoset *pcountryinfo; - u8 *pos, *end, *p; - u8 n_ex_rates = 0, got_basic_rates = 0, n_basic_rates = 0; - u16 beaconsize = 0; - int ret; - - lbs_deb_enter(LBS_DEB_SCAN); - - if (*bytesleft >= sizeof(beaconsize)) { - /* Extract & convert beacon size from the command buffer */ - beaconsize = le16_to_cpu(get_unaligned((u16 *)*pbeaconinfo)); - *bytesleft -= sizeof(beaconsize); - *pbeaconinfo += sizeof(beaconsize); - } - - if (beaconsize == 0 || beaconsize > *bytesleft) { - *pbeaconinfo += *bytesleft; - *bytesleft = 0; - ret = -1; - goto done; - } - - /* Initialize the current working beacon pointer for this BSS iteration */ - pos = *pbeaconinfo; - end = pos + beaconsize; - - /* Advance the return beacon pointer past the current beacon */ - *pbeaconinfo += beaconsize; - *bytesleft -= beaconsize; - - memcpy(bss->bssid, pos, ETH_ALEN); - lbs_deb_scan("process_bss: AP BSSID %s\n", print_mac(mac, bss->bssid)); - pos += ETH_ALEN; - - if ((end - pos) < 12) { - lbs_deb_scan("process_bss: Not enough bytes left\n"); - ret = -1; - goto done; - } - - /* - * next 4 fields are RSSI, time stamp, beacon interval, - * and capability information - */ - - /* RSSI is 1 byte long */ - bss->rssi = *pos; - lbs_deb_scan("process_bss: RSSI=%02X\n", *pos); - pos++; - - /* time stamp is 8 bytes long */ - pos += 8; - - /* beacon interval is 2 bytes long */ - bss->beaconperiod = le16_to_cpup((void *) pos); - pos += 2; - - /* capability information is 2 bytes long */ - bss->capability = le16_to_cpup((void *) pos); - lbs_deb_scan("process_bss: capabilities = 0x%4X\n", bss->capability); - pos += 2; - - if (bss->capability & WLAN_CAPABILITY_PRIVACY) - lbs_deb_scan("process_bss: AP WEP enabled\n"); - if (bss->capability & WLAN_CAPABILITY_IBSS) - bss->mode = IW_MODE_ADHOC; - else - bss->mode = IW_MODE_INFRA; - - /* rest of the current buffer are IE's */ - lbs_deb_scan("process_bss: IE length for this AP = %zd\n", end - pos); - lbs_deb_hex(LBS_DEB_SCAN, "process_bss: IE info", pos, end - pos); - - /* process variable IE */ - while (pos <= end - 2) { - struct ieee80211_info_element * elem = - (struct ieee80211_info_element *) pos; - - if (pos + elem->len > end) { - lbs_deb_scan("process_bss: error in processing IE, " - "bytes left < IE length\n"); - break; - } - - switch (elem->id) { - case MFIE_TYPE_SSID: - bss->ssid_len = elem->len; - memcpy(bss->ssid, elem->data, elem->len); - lbs_deb_scan("ssid '%s', ssid length %u\n", - escape_essid(bss->ssid, bss->ssid_len), - bss->ssid_len); - break; - - case MFIE_TYPE_RATES: - n_basic_rates = min_t(u8, MAX_RATES, elem->len); - memcpy(bss->rates, elem->data, n_basic_rates); - got_basic_rates = 1; - break; - - case MFIE_TYPE_FH_SET: - pFH = (struct ieeetypes_fhparamset *) pos; - memmove(&bss->phyparamset.fhparamset, pFH, - sizeof(struct ieeetypes_fhparamset)); -#if 0 /* I think we can store these LE */ - bss->phyparamset.fhparamset.dwelltime - = le16_to_cpu(bss->phyparamset.fhparamset.dwelltime); -#endif - break; - - case MFIE_TYPE_DS_SET: - pDS = (struct ieeetypes_dsparamset *) pos; - bss->channel = pDS->currentchan; - memcpy(&bss->phyparamset.dsparamset, pDS, - sizeof(struct ieeetypes_dsparamset)); - break; - - case MFIE_TYPE_CF_SET: - pCF = (struct ieeetypes_cfparamset *) pos; - memcpy(&bss->ssparamset.cfparamset, pCF, - sizeof(struct ieeetypes_cfparamset)); - break; - - case MFIE_TYPE_IBSS_SET: - pibss = (struct ieeetypes_ibssparamset *) pos; - bss->atimwindow = le32_to_cpu(pibss->atimwindow); - memmove(&bss->ssparamset.ibssparamset, pibss, - sizeof(struct ieeetypes_ibssparamset)); -#if 0 - bss->ssparamset.ibssparamset.atimwindow - = le16_to_cpu(bss->ssparamset.ibssparamset.atimwindow); -#endif - break; - - case MFIE_TYPE_COUNTRY: - pcountryinfo = (struct ieeetypes_countryinfoset *) pos; - if (pcountryinfo->len < sizeof(pcountryinfo->countrycode) - || pcountryinfo->len > 254) { - lbs_deb_scan("process_bss: 11D- Err " - "CountryInfo len =%d min=%zd max=254\n", - pcountryinfo->len, - sizeof(pcountryinfo->countrycode)); - ret = -1; - goto done; - } - - memcpy(&bss->countryinfo, - pcountryinfo, pcountryinfo->len + 2); - lbs_deb_hex(LBS_DEB_SCAN, "process_bss: 11d countryinfo", - (u8 *) pcountryinfo, - (u32) (pcountryinfo->len + 2)); - break; - - case MFIE_TYPE_RATES_EX: - /* only process extended supported rate if data rate is - * already found. Data rate IE should come before - * extended supported rate IE - */ - if (!got_basic_rates) - break; - - n_ex_rates = elem->len; - if (n_basic_rates + n_ex_rates > MAX_RATES) - n_ex_rates = MAX_RATES - n_basic_rates; - - p = bss->rates + n_basic_rates; - memcpy(p, elem->data, n_ex_rates); - break; - - case MFIE_TYPE_GENERIC: - if (elem->len >= 4 && - elem->data[0] == 0x00 && - elem->data[1] == 0x50 && - elem->data[2] == 0xf2 && - elem->data[3] == 0x01) { - bss->wpa_ie_len = min(elem->len + 2, - MAX_WPA_IE_LEN); - memcpy(bss->wpa_ie, elem, bss->wpa_ie_len); - lbs_deb_hex(LBS_DEB_SCAN, "process_bss: WPA IE", bss->wpa_ie, - elem->len); - } else if (elem->len >= MARVELL_MESH_IE_LENGTH && - elem->data[0] == 0x00 && - elem->data[1] == 0x50 && - elem->data[2] == 0x43 && - elem->data[3] == 0x04) { - bss->mesh = 1; - } - break; - - case MFIE_TYPE_RSN: - bss->rsn_ie_len = min(elem->len + 2, MAX_WPA_IE_LEN); - memcpy(bss->rsn_ie, elem, bss->rsn_ie_len); - lbs_deb_hex(LBS_DEB_SCAN, "process_bss: RSN_IE", bss->rsn_ie, elem->len); - break; - - default: - break; - } - - pos += elem->len + 2; - } - - /* Timestamp */ - bss->last_scanned = jiffies; - libertas_unset_basic_rate_flags(bss->rates, sizeof(bss->rates)); - - ret = 0; - -done: - lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret); - return ret; -} - -/** - * @brief This function finds a specific compatible BSSID in the scan list - * - * Used in association code - * - * @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) - */ -struct bss_descriptor *libertas_find_bssid_in_list(wlan_adapter * adapter, - u8 * bssid, u8 mode) -{ - struct bss_descriptor * iter_bss; - struct bss_descriptor * found_bss = NULL; - - lbs_deb_enter(LBS_DEB_SCAN); - - if (!bssid) - goto out; - - lbs_deb_hex(LBS_DEB_SCAN, "looking for", - bssid, ETH_ALEN); - - /* Look through the scan table for a compatible match. The loop will - * continue past a matched bssid that is not compatible in case there - * is an AP with multiple SSIDs assigned to the same BSSID - */ - mutex_lock(&adapter->lock); - list_for_each_entry (iter_bss, &adapter->network_list, list) { - if (compare_ether_addr(iter_bss->bssid, bssid)) - continue; /* bssid doesn't match */ - switch (mode) { - case IW_MODE_INFRA: - case IW_MODE_ADHOC: - if (!is_network_compatible(adapter, iter_bss, mode)) - break; - found_bss = iter_bss; - break; - default: - found_bss = iter_bss; - break; - } - } - mutex_unlock(&adapter->lock); - -out: - lbs_deb_leave_args(LBS_DEB_SCAN, "found_bss %p", found_bss); - return found_bss; -} - -/** - * @brief This function finds ssid in ssid list. - * - * Used in association code - * - * @param 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 - */ -struct bss_descriptor * libertas_find_ssid_in_list(wlan_adapter * adapter, - u8 *ssid, u8 ssid_len, u8 * bssid, u8 mode, - int channel) -{ - u8 bestrssi = 0; - struct bss_descriptor * iter_bss = NULL; - struct bss_descriptor * found_bss = NULL; - struct bss_descriptor * tmp_oldest = NULL; - - lbs_deb_enter(LBS_DEB_SCAN); - - mutex_lock(&adapter->lock); - - list_for_each_entry (iter_bss, &adapter->network_list, list) { - if ( !tmp_oldest - || (iter_bss->last_scanned < tmp_oldest->last_scanned)) - tmp_oldest = iter_bss; - - if (libertas_ssid_cmp(iter_bss->ssid, iter_bss->ssid_len, - ssid, ssid_len) != 0) - continue; /* ssid doesn't match */ - if (bssid && compare_ether_addr(iter_bss->bssid, bssid) != 0) - continue; /* bssid doesn't match */ - if ((channel > 0) && (iter_bss->channel != channel)) - continue; /* channel doesn't match */ - - switch (mode) { - case IW_MODE_INFRA: - case IW_MODE_ADHOC: - if (!is_network_compatible(adapter, iter_bss, mode)) - break; - - if (bssid) { - /* Found requested BSSID */ - found_bss = iter_bss; - goto out; - } - - if (SCAN_RSSI(iter_bss->rssi) > bestrssi) { - bestrssi = SCAN_RSSI(iter_bss->rssi); - found_bss = iter_bss; - } - break; - case IW_MODE_AUTO: - default: - if (SCAN_RSSI(iter_bss->rssi) > bestrssi) { - bestrssi = SCAN_RSSI(iter_bss->rssi); - found_bss = iter_bss; - } - break; - } - } - -out: - mutex_unlock(&adapter->lock); - lbs_deb_leave_args(LBS_DEB_SCAN, "found_bss %p", found_bss); - return found_bss; -} - -/** - * @brief This function finds the best SSID in the Scan List - * - * Search the scan table for the best SSID that also matches the current - * adapter network preference (infrastructure or adhoc) - * - * @param adapter A pointer to wlan_adapter - * - * @return index in BSSID list - */ -static struct bss_descriptor * libertas_find_best_ssid_in_list(wlan_adapter * adapter, - u8 mode) -{ - u8 bestrssi = 0; - struct bss_descriptor * iter_bss; - struct bss_descriptor * best_bss = NULL; - - lbs_deb_enter(LBS_DEB_SCAN); - - mutex_lock(&adapter->lock); - - list_for_each_entry (iter_bss, &adapter->network_list, list) { - switch (mode) { - case IW_MODE_INFRA: - case IW_MODE_ADHOC: - if (!is_network_compatible(adapter, iter_bss, mode)) - break; - if (SCAN_RSSI(iter_bss->rssi) <= bestrssi) - break; - bestrssi = SCAN_RSSI(iter_bss->rssi); - best_bss = iter_bss; - break; - case IW_MODE_AUTO: - default: - if (SCAN_RSSI(iter_bss->rssi) <= bestrssi) - break; - bestrssi = SCAN_RSSI(iter_bss->rssi); - best_bss = iter_bss; - break; - } - } - - mutex_unlock(&adapter->lock); - lbs_deb_leave_args(LBS_DEB_SCAN, "best_bss %p", best_bss); - return best_bss; -} - -/** - * @brief Find the AP with specific ssid in the scan list - * - * Used from association worker. - * - * @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, - u8 *out_ssid, u8 *out_ssid_len, u8 preferred_mode, u8 *out_mode) -{ - wlan_adapter *adapter = priv->adapter; - int ret = -1; - struct bss_descriptor * found; - - lbs_deb_enter(LBS_DEB_SCAN); - - wlan_scan_networks(priv, NULL, 1); - if (adapter->surpriseremoved) - goto out; - - wait_event_interruptible(adapter->cmd_pending, !adapter->nr_cmd_pending); - - found = libertas_find_best_ssid_in_list(adapter, preferred_mode); - if (found && (found->ssid_len > 0)) { - memcpy(out_ssid, &found->ssid, IW_ESSID_MAX_SIZE); - *out_ssid_len = found->ssid_len; - *out_mode = found->mode; - ret = 0; - } - -out: - lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret); - return ret; -} - -/** - * @brief 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; - - lbs_deb_enter(LBS_DEB_SCAN); - - if (!delayed_work_pending(&priv->scan_work)) { - queue_delayed_work(priv->work_thread, &priv->scan_work, - msecs_to_jiffies(50)); - } - - if (adapter->surpriseremoved) - return -1; - - lbs_deb_leave(LBS_DEB_SCAN); - return 0; -} - - -/** - * @brief Send a scan command for all available channels filtered on a spec - * - * Used in association code and from debugfs - * - * @param priv A pointer to wlan_private structure - * @param ssid A pointer to the SSID to scan for - * @param ssid_len Length of the SSID - * @param clear_ssid Should existing scan results with this SSID - * be cleared? - * @param prequestedssid A pointer to AP's ssid - * @param keeppreviousscan Flag used to save/clear scan table before scan - * - * @return 0-success, otherwise fail - */ -int libertas_send_specific_ssid_scan(wlan_private * priv, - u8 *ssid, u8 ssid_len, u8 clear_ssid) -{ - wlan_adapter *adapter = priv->adapter; - struct wlan_ioctl_user_scan_cfg scancfg; - int ret = 0; - - lbs_deb_enter_args(LBS_DEB_SCAN, "SSID '%s', clear %d", - escape_essid(ssid, ssid_len), clear_ssid); - - if (!ssid_len) - goto out; - - memset(&scancfg, 0x00, sizeof(scancfg)); - memcpy(scancfg.ssid, ssid, ssid_len); - scancfg.ssid_len = ssid_len; - scancfg.clear_ssid = clear_ssid; - - wlan_scan_networks(priv, &scancfg, 1); - if (adapter->surpriseremoved) { - ret = -1; - goto out; - } - wait_event_interruptible(adapter->cmd_pending, !adapter->nr_cmd_pending); - -out: - lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret); - return ret; -} - - - - -/*********************************************************************/ -/* */ -/* Support for Wireless Extensions */ -/* */ -/*********************************************************************/ - -#define MAX_CUSTOM_LEN 64 - -static inline char *libertas_translate_scan(wlan_private *priv, - char *start, char *stop, - struct bss_descriptor *bss) -{ - wlan_adapter *adapter = priv->adapter; - struct chan_freq_power *cfp; - char *current_val; /* For rates */ - struct iw_event iwe; /* Temporary buffer */ - int j; -#define PERFECT_RSSI ((u8)50) -#define WORST_RSSI ((u8)0) -#define RSSI_DIFF ((u8)(PERFECT_RSSI - WORST_RSSI)) - u8 rssi; - - lbs_deb_enter(LBS_DEB_SCAN); - - cfp = libertas_find_cfp_by_band_and_channel(adapter, 0, bss->channel); - if (!cfp) { - lbs_deb_scan("Invalid channel number %d\n", bss->channel); - start = NULL; - goto out; - } - - /* First entry *MUST* be the AP BSSID */ - iwe.cmd = SIOCGIWAP; - iwe.u.ap_addr.sa_family = ARPHRD_ETHER; - memcpy(iwe.u.ap_addr.sa_data, &bss->bssid, ETH_ALEN); - start = iwe_stream_add_event(start, stop, &iwe, IW_EV_ADDR_LEN); - - /* SSID */ - iwe.cmd = SIOCGIWESSID; - iwe.u.data.flags = 1; - iwe.u.data.length = min((u32) bss->ssid_len, (u32) IW_ESSID_MAX_SIZE); - start = iwe_stream_add_point(start, stop, &iwe, bss->ssid); - - /* Mode */ - iwe.cmd = SIOCGIWMODE; - iwe.u.mode = bss->mode; - start = iwe_stream_add_event(start, stop, &iwe, IW_EV_UINT_LEN); - - /* Frequency */ - iwe.cmd = SIOCGIWFREQ; - iwe.u.freq.m = (long)cfp->freq * 100000; - iwe.u.freq.e = 1; - start = iwe_stream_add_event(start, stop, &iwe, IW_EV_FREQ_LEN); - - /* Add quality statistics */ - iwe.cmd = IWEVQUAL; - iwe.u.qual.updated = IW_QUAL_ALL_UPDATED; - iwe.u.qual.level = SCAN_RSSI(bss->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; - - 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]); - } - - /* Locally created ad-hoc BSSs won't have beacons if this is the - * only station in the adhoc network; so get signal strength - * from receive statistics. - */ - if ((adapter->mode == IW_MODE_ADHOC) - && adapter->adhoccreate - && !libertas_ssid_cmp(adapter->curbssparams.ssid, - adapter->curbssparams.ssid_len, - bss->ssid, bss->ssid_len)) { - int snr, nf; - snr = adapter->SNR[TYPE_RXPD][TYPE_AVG] / AVG_SCALE; - nf = adapter->NF[TYPE_RXPD][TYPE_AVG] / AVG_SCALE; - iwe.u.qual.level = CAL_RSSI(snr, nf); - } - start = iwe_stream_add_event(start, stop, &iwe, IW_EV_QUAL_LEN); - - /* Add encryption capability */ - iwe.cmd = SIOCGIWENCODE; - if (bss->capability & WLAN_CAPABILITY_PRIVACY) { - iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY; - } else { - iwe.u.data.flags = IW_ENCODE_DISABLED; - } - iwe.u.data.length = 0; - start = iwe_stream_add_point(start, stop, &iwe, bss->ssid); - - current_val = start + IW_EV_LCP_LEN; - - iwe.cmd = SIOCGIWRATE; - iwe.u.bitrate.fixed = 0; - iwe.u.bitrate.disabled = 0; - iwe.u.bitrate.value = 0; - - for (j = 0; bss->rates[j] && (j < sizeof(bss->rates)); j++) { - /* Bit rate given in 500 kb/s units */ - iwe.u.bitrate.value = bss->rates[j] * 500000; - current_val = iwe_stream_add_value(start, current_val, - stop, &iwe, IW_EV_PARAM_LEN); - } - if ((bss->mode == IW_MODE_ADHOC) - && !libertas_ssid_cmp(adapter->curbssparams.ssid, - adapter->curbssparams.ssid_len, - bss->ssid, bss->ssid_len) - && adapter->adhoccreate) { - iwe.u.bitrate.value = 22 * 500000; - current_val = iwe_stream_add_value(start, current_val, - stop, &iwe, IW_EV_PARAM_LEN); - } - /* Check if we added any event */ - if((current_val - start) > IW_EV_LCP_LEN) - start = current_val; - - memset(&iwe, 0, sizeof(iwe)); - if (bss->wpa_ie_len) { - char buf[MAX_WPA_IE_LEN]; - memcpy(buf, bss->wpa_ie, bss->wpa_ie_len); - iwe.cmd = IWEVGENIE; - iwe.u.data.length = bss->wpa_ie_len; - start = iwe_stream_add_point(start, stop, &iwe, buf); - } - - memset(&iwe, 0, sizeof(iwe)); - if (bss->rsn_ie_len) { - char buf[MAX_WPA_IE_LEN]; - memcpy(buf, bss->rsn_ie, bss->rsn_ie_len); - iwe.cmd = IWEVGENIE; - iwe.u.data.length = bss->rsn_ie_len; - start = iwe_stream_add_point(start, stop, &iwe, buf); - } - - if (bss->mesh) { - char custom[MAX_CUSTOM_LEN]; - char *p = custom; - - iwe.cmd = IWEVCUSTOM; - p += snprintf(p, MAX_CUSTOM_LEN - (p - custom), - "mesh-type: olpc"); - iwe.u.data.length = p - custom; - if (iwe.u.data.length) - start = iwe_stream_add_point(start, stop, &iwe, custom); - } - -out: - lbs_deb_leave_args(LBS_DEB_SCAN, "start %p", start); - return start; -} - -/** - * @brief Handle Retrieve scan table ioctl - * - * @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) -{ -#define SCAN_ITEM_SIZE 128 - wlan_private *priv = dev->priv; - wlan_adapter *adapter = priv->adapter; - int err = 0; - char *ev = extra; - char *stop = ev + dwrq->length; - struct bss_descriptor * iter_bss; - struct bss_descriptor * safe; - - lbs_deb_enter(LBS_DEB_SCAN); - - /* Update RSSI if current BSS is a locally created ad-hoc BSS */ - if ((adapter->mode == IW_MODE_ADHOC) && adapter->adhoccreate) { - libertas_prepare_and_send_command(priv, CMD_802_11_RSSI, 0, - CMD_OPTION_WAITFORRSP, 0, NULL); - } - - mutex_lock(&adapter->lock); - list_for_each_entry_safe (iter_bss, safe, &adapter->network_list, list) { - char * next_ev; - unsigned long stale_time; - - if (stop - ev < SCAN_ITEM_SIZE) { - err = -E2BIG; - break; - } - - /* For mesh device, list only mesh networks */ - if (dev == priv->mesh_dev && !iter_bss->mesh) - continue; - - /* Prune old an old scan result */ - stale_time = iter_bss->last_scanned + DEFAULT_MAX_SCAN_AGE; - if (time_after(jiffies, stale_time)) { - list_move_tail (&iter_bss->list, - &adapter->network_free_list); - clear_bss_descriptor(iter_bss); - continue; - } - - /* Translate to WE format this entry */ - next_ev = libertas_translate_scan(priv, ev, stop, iter_bss); - if (next_ev == NULL) - continue; - ev = next_ev; - } - mutex_unlock(&adapter->lock); - - dwrq->length = (ev - extra); - dwrq->flags = 0; - - lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", err); - return err; -} - - - - -/*********************************************************************/ -/* */ -/* Command execution */ -/* */ -/*********************************************************************/ - - -/** - * @brief Prepare a scan command to be sent to the firmware - * - * Called from libertas_prepare_and_send_command() in cmd.c - * - * Sends a fixed lenght data part (specifying the BSS type and BSSID filters) - * as well as a variable number/length of TLVs to the firmware. - * - * @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 - */ -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 = pdata_buf; - - lbs_deb_enter(LBS_DEB_SCAN); - - /* Set fixed field variables in scan command */ - pscan->bsstype = pscancfg->bsstype; - memcpy(pscan->bssid, pscancfg->bssid, ETH_ALEN); - memcpy(pscan->tlvbuffer, pscancfg->tlvbuffer, pscancfg->tlvbufferlen); - - cmd->command = cpu_to_le16(CMD_802_11_SCAN); - - /* size is equal to the sizeof(fixed portions) + the TLV len + header */ - cmd->size = cpu_to_le16(sizeof(pscan->bsstype) + ETH_ALEN - + pscancfg->tlvbufferlen + S_DS_GEN); - - lbs_deb_scan("SCAN_CMD: command 0x%04x, size %d, seqnum %d\n", - le16_to_cpu(cmd->command), le16_to_cpu(cmd->size), - le16_to_cpu(cmd->seqnum)); - - lbs_deb_leave(LBS_DEB_SCAN); - return 0; -} - -static inline int is_same_network(struct bss_descriptor *src, - struct bss_descriptor *dst) -{ - /* A network is only a duplicate if the channel, BSSID, and ESSID - * all match. We treat all <hidden> with the same BSSID and channel - * as one network */ - return ((src->ssid_len == dst->ssid_len) && - (src->channel == dst->channel) && - !compare_ether_addr(src->bssid, dst->bssid) && - !memcmp(src->ssid, dst->ssid, src->ssid_len)); -} - -/** - * @brief This function handles the command response of scan - * - * Called from handle_cmd_response() in cmdrespc. - * - * 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 * iter_bss; - struct bss_descriptor * safe; - u8 *pbssinfo; - u16 scanrespsize; - int bytesleft; - int idx; - int tlvbufsize; - int ret; - - lbs_deb_enter(LBS_DEB_SCAN); - - /* Prune old entries from scan table */ - list_for_each_entry_safe (iter_bss, safe, &adapter->network_list, list) { - unsigned long stale_time = iter_bss->last_scanned + DEFAULT_MAX_SCAN_AGE; - if (time_before(jiffies, stale_time)) - continue; - list_move_tail (&iter_bss->list, &adapter->network_free_list); - clear_bss_descriptor(iter_bss); - } - - pscan = &resp->params.scanresp; - - if (pscan->nr_sets > MAX_NETWORK_COUNT) { - lbs_deb_scan( - "SCAN_RESP: too many scan results (%d, max %d)!!\n", - pscan->nr_sets, MAX_NETWORK_COUNT); - ret = -1; - goto done; - } - - bytesleft = le16_to_cpu(get_unaligned((u16*)&pscan->bssdescriptsize)); - lbs_deb_scan("SCAN_RESP: bssdescriptsize %d\n", bytesleft); - - scanrespsize = le16_to_cpu(get_unaligned((u16*)&resp->size)); - lbs_deb_scan("SCAN_RESP: returned %d AP before parsing\n", - pscan->nr_sets); - - 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); - - /* - * 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++) { - struct bss_descriptor new; - struct bss_descriptor * found = NULL; - struct bss_descriptor * oldest = NULL; - DECLARE_MAC_BUF(mac); - - /* Process the data fields and IEs returned for this BSS */ - memset(&new, 0, sizeof (struct bss_descriptor)); - if (libertas_process_bss(&new, &pbssinfo, &bytesleft) != 0) { - /* error parsing the scan response, skipped */ - lbs_deb_scan("SCAN_RESP: process_bss returned ERROR\n"); - continue; - } - - /* Try to find this bss in the scan table */ - list_for_each_entry (iter_bss, &adapter->network_list, list) { - if (is_same_network(iter_bss, &new)) { - found = iter_bss; - break; - } - - if ((oldest == NULL) || - (iter_bss->last_scanned < oldest->last_scanned)) - oldest = iter_bss; - } - - if (found) { - /* found, clear it */ - clear_bss_descriptor(found); - } else if (!list_empty(&adapter->network_free_list)) { - /* Pull one from the free list */ - found = list_entry(adapter->network_free_list.next, - struct bss_descriptor, list); - list_move_tail(&found->list, &adapter->network_list); - } else if (oldest) { - /* If there are no more slots, expire the oldest */ - found = oldest; - clear_bss_descriptor(found); - list_move_tail(&found->list, &adapter->network_list); - } else { - continue; - } - - lbs_deb_scan("SCAN_RESP: BSSID = %s\n", - print_mac(mac, new.bssid)); - - /* Copy the locally created newbssentry to the scan table */ - memcpy(found, &new, offsetof(struct bss_descriptor, list)); - } - - ret = 0; - -done: - lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret); - return ret; -} |