diff options
Diffstat (limited to 'drivers/net/wireless/libertas/scan.c')
| -rw-r--r-- | drivers/net/wireless/libertas/scan.c | 1354 |
1 files changed, 0 insertions, 1354 deletions
diff --git a/drivers/net/wireless/libertas/scan.c b/drivers/net/wireless/libertas/scan.c deleted file mode 100644 index 24cd54b..0000000 --- a/drivers/net/wireless/libertas/scan.c +++ /dev/null @@ -1,1354 +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/slab.h> -#include <linux/types.h> -#include <linux/kernel.h> -#include <linux/etherdevice.h> -#include <linux/if_arp.h> -#include <asm/unaligned.h> -#include <net/lib80211.h> - -#include "host.h" -#include "dev.h" -#include "scan.h" -#include "assoc.h" -#include "wext.h" -#include "cmd.h" - -//! Approximate amount of data needed to pass a scan result back to iwlist -#define MAX_SCAN_CELL_SIZE (IW_EV_ADDR_LEN \ - + IEEE80211_MAX_SSID_LEN \ - + IW_EV_UINT_LEN \ - + IW_EV_FREQ_LEN \ - + IW_EV_QUAL_LEN \ - + IEEE80211_MAX_SSID_LEN \ - + 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 mrvl_ie_header) \ - + (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 mrvl_ie_ssid_param_set)) - -//! Maximum memory needed for a cmd_ds_802_11_scan with all TLVs at max -#define MAX_SCAN_CFG_ALLOC (sizeof(struct cmd_ds_802_11_scan) \ - + 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 - -#define DEFAULT_MAX_SCAN_AGE (15 * HZ) - -static int lbs_ret_80211_scan(struct lbs_private *priv, unsigned long dummy, - struct cmd_header *resp); - -/*********************************************************************/ -/* */ -/* Misc helper functions */ -/* */ -/*********************************************************************/ - -/** - * @brief Unsets the MSB on basic rates - * - * Scan through an array and unset the MSB for basic data rates. - * - * @param rates buffer of data rates - * @param len size of buffer - */ -static void lbs_unset_basic_rate_flags(u8 *rates, size_t len) -{ - int i; - - for (i = 0; i < len; i++) - rates[i] &= 0x7f; -} - - -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)); -} - -/** - * @brief Compare two SSIDs - * - * @param ssid1 A pointer to ssid to compare - * @param ssid2 A pointer to ssid to compare - * - * @return 0: ssid is same, otherwise is different - */ -int lbs_ssid_cmp(uint8_t *ssid1, uint8_t ssid1_len, uint8_t *ssid2, - uint8_t ssid2_len) -{ - if (ssid1_len != ssid2_len) - return -1; - - return memcmp(ssid1, ssid2, ssid1_len); -} - -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)); -} - - - -/*********************************************************************/ -/* */ -/* Region channel support */ -/* */ -/*********************************************************************/ - -#define LBS_TX_PWR_DEFAULT 20 /*100mW */ -#define LBS_TX_PWR_US_DEFAULT 20 /*100mW */ -#define LBS_TX_PWR_JP_DEFAULT 16 /*50mW */ -#define LBS_TX_PWR_FR_DEFAULT 20 /*100mW */ -#define LBS_TX_PWR_EMEA_DEFAULT 20 /*100mW */ - -/* Format { channel, frequency (MHz), maxtxpower } */ -/* band: 'B/G', region: USA FCC/Canada IC */ -static struct chan_freq_power channel_freq_power_US_BG[] = { - {1, 2412, LBS_TX_PWR_US_DEFAULT}, - {2, 2417, LBS_TX_PWR_US_DEFAULT}, - {3, 2422, LBS_TX_PWR_US_DEFAULT}, - {4, 2427, LBS_TX_PWR_US_DEFAULT}, - {5, 2432, LBS_TX_PWR_US_DEFAULT}, - {6, 2437, LBS_TX_PWR_US_DEFAULT}, - {7, 2442, LBS_TX_PWR_US_DEFAULT}, - {8, 2447, LBS_TX_PWR_US_DEFAULT}, - {9, 2452, LBS_TX_PWR_US_DEFAULT}, - {10, 2457, LBS_TX_PWR_US_DEFAULT}, - {11, 2462, LBS_TX_PWR_US_DEFAULT} -}; - -/* band: 'B/G', region: Europe ETSI */ -static struct chan_freq_power channel_freq_power_EU_BG[] = { - {1, 2412, LBS_TX_PWR_EMEA_DEFAULT}, - {2, 2417, LBS_TX_PWR_EMEA_DEFAULT}, - {3, 2422, LBS_TX_PWR_EMEA_DEFAULT}, - {4, 2427, LBS_TX_PWR_EMEA_DEFAULT}, - {5, 2432, LBS_TX_PWR_EMEA_DEFAULT}, - {6, 2437, LBS_TX_PWR_EMEA_DEFAULT}, - {7, 2442, LBS_TX_PWR_EMEA_DEFAULT}, - {8, 2447, LBS_TX_PWR_EMEA_DEFAULT}, - {9, 2452, LBS_TX_PWR_EMEA_DEFAULT}, - {10, 2457, LBS_TX_PWR_EMEA_DEFAULT}, - {11, 2462, LBS_TX_PWR_EMEA_DEFAULT}, - {12, 2467, LBS_TX_PWR_EMEA_DEFAULT}, - {13, 2472, LBS_TX_PWR_EMEA_DEFAULT} -}; - -/* band: 'B/G', region: Spain */ -static struct chan_freq_power channel_freq_power_SPN_BG[] = { - {10, 2457, LBS_TX_PWR_DEFAULT}, - {11, 2462, LBS_TX_PWR_DEFAULT} -}; - -/* band: 'B/G', region: France */ -static struct chan_freq_power channel_freq_power_FR_BG[] = { - {10, 2457, LBS_TX_PWR_FR_DEFAULT}, - {11, 2462, LBS_TX_PWR_FR_DEFAULT}, - {12, 2467, LBS_TX_PWR_FR_DEFAULT}, - {13, 2472, LBS_TX_PWR_FR_DEFAULT} -}; - -/* band: 'B/G', region: Japan */ -static struct chan_freq_power channel_freq_power_JPN_BG[] = { - {1, 2412, LBS_TX_PWR_JP_DEFAULT}, - {2, 2417, LBS_TX_PWR_JP_DEFAULT}, - {3, 2422, LBS_TX_PWR_JP_DEFAULT}, - {4, 2427, LBS_TX_PWR_JP_DEFAULT}, - {5, 2432, LBS_TX_PWR_JP_DEFAULT}, - {6, 2437, LBS_TX_PWR_JP_DEFAULT}, - {7, 2442, LBS_TX_PWR_JP_DEFAULT}, - {8, 2447, LBS_TX_PWR_JP_DEFAULT}, - {9, 2452, LBS_TX_PWR_JP_DEFAULT}, - {10, 2457, LBS_TX_PWR_JP_DEFAULT}, - {11, 2462, LBS_TX_PWR_JP_DEFAULT}, - {12, 2467, LBS_TX_PWR_JP_DEFAULT}, - {13, 2472, LBS_TX_PWR_JP_DEFAULT}, - {14, 2484, LBS_TX_PWR_JP_DEFAULT} -}; - -/** - * the structure for channel, frequency and power - */ -struct region_cfp_table { - u8 region; - struct chan_freq_power *cfp_BG; - int cfp_no_BG; -}; - -/** - * the structure for the mapping between region and CFP - */ -static struct region_cfp_table region_cfp_table[] = { - {0x10, /*US FCC */ - channel_freq_power_US_BG, - ARRAY_SIZE(channel_freq_power_US_BG), - } - , - {0x20, /*CANADA IC */ - channel_freq_power_US_BG, - ARRAY_SIZE(channel_freq_power_US_BG), - } - , - {0x30, /*EU*/ channel_freq_power_EU_BG, - ARRAY_SIZE(channel_freq_power_EU_BG), - } - , - {0x31, /*SPAIN*/ channel_freq_power_SPN_BG, - ARRAY_SIZE(channel_freq_power_SPN_BG), - } - , - {0x32, /*FRANCE*/ channel_freq_power_FR_BG, - ARRAY_SIZE(channel_freq_power_FR_BG), - } - , - {0x40, /*JAPAN*/ channel_freq_power_JPN_BG, - ARRAY_SIZE(channel_freq_power_JPN_BG), - } - , -/*Add new region here */ -}; - -/** - * @brief This function finds the CFP in - * region_cfp_table based on region and band parameter. - * - * @param region The region code - * @param band The band - * @param cfp_no A pointer to CFP number - * @return A pointer to CFP - */ -static struct chan_freq_power *lbs_get_region_cfp_table(u8 region, int *cfp_no) -{ - int i, end; - - lbs_deb_enter(LBS_DEB_MAIN); - - end = ARRAY_SIZE(region_cfp_table); - - for (i = 0; i < end ; i++) { - lbs_deb_main("region_cfp_table[i].region=%d\n", - region_cfp_table[i].region); - if (region_cfp_table[i].region == region) { - *cfp_no = region_cfp_table[i].cfp_no_BG; - lbs_deb_leave(LBS_DEB_MAIN); - return region_cfp_table[i].cfp_BG; - } - } - - lbs_deb_leave_args(LBS_DEB_MAIN, "ret NULL"); - return NULL; -} - -int lbs_set_regiontable(struct lbs_private *priv, u8 region, u8 band) -{ - int ret = 0; - int i = 0; - - struct chan_freq_power *cfp; - int cfp_no; - - lbs_deb_enter(LBS_DEB_MAIN); - - memset(priv->region_channel, 0, sizeof(priv->region_channel)); - - cfp = lbs_get_region_cfp_table(region, &cfp_no); - if (cfp != NULL) { - priv->region_channel[i].nrcfp = cfp_no; - priv->region_channel[i].CFP = cfp; - } else { - lbs_deb_main("wrong region code %#x in band B/G\n", - region); - ret = -1; - goto out; - } - priv->region_channel[i].valid = 1; - priv->region_channel[i].region = region; - priv->region_channel[i].band = band; - i++; -out: - lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret); - return ret; -} - - - - -/*********************************************************************/ -/* */ -/* Main scanning support */ -/* */ -/*********************************************************************/ - -/** - * @brief Create a channel list for the driver to scan based on region info - * - * Only used from lbs_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 struct lbs_private structure - * @param scanchanlist Output parameter: resulting channel list to scan - * - * @return void - */ -static int lbs_scan_create_channel_list(struct lbs_private *priv, - struct chanscanparamset *scanchanlist) -{ - struct region_channel *scanregion; - struct chan_freq_power *cfp; - int rgnidx; - int chanidx; - int nextchan; - uint8_t 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 = CMD_SCAN_TYPE_ACTIVE; - - for (rgnidx = 0; rgnidx < ARRAY_SIZE(priv->region_channel); rgnidx++) { - if (!priv->region_channel[rgnidx].valid) - continue; - scanregion = &priv->region_channel[rgnidx]; - - for (nextchan = 0; nextchan < scanregion->nrcfp; nextchan++, chanidx++) { - struct chanscanparamset *chan = &scanchanlist[chanidx]; - - cfp = scanregion->CFP + nextchan; - - if (scanregion->band == BAND_B || scanregion->band == BAND_G) - chan->radiotype = CMD_SCAN_RADIO_TYPE_BG; - - if (scantype == CMD_SCAN_TYPE_PASSIVE) { - chan->maxscantime = cpu_to_le16(MRVDRV_PASSIVE_SCAN_CHAN_TIME); - chan->chanscanmode.passivescan = 1; - } else { - chan->maxscantime = cpu_to_le16(MRVDRV_ACTIVE_SCAN_CHAN_TIME); - chan->chanscanmode.passivescan = 0; - } - - chan->channumber = cfp->channel; - } - } - return chanidx; -} - -/* - * Add SSID TLV of the form: - * - * TLV-ID SSID 00 00 - * length 06 00 - * ssid 4d 4e 54 45 53 54 - */ -static int lbs_scan_add_ssid_tlv(struct lbs_private *priv, u8 *tlv) -{ - struct mrvl_ie_ssid_param_set *ssid_tlv = (void *)tlv; - - ssid_tlv->header.type = cpu_to_le16(TLV_TYPE_SSID); - ssid_tlv->header.len = cpu_to_le16(priv->scan_ssid_len); - memcpy(ssid_tlv->ssid, priv->scan_ssid, priv->scan_ssid_len); - return sizeof(ssid_tlv->header) + priv->scan_ssid_len; -} - -/* - * Add CHANLIST TLV of the form - * - * TLV-ID CHANLIST 01 01 - * length 5b 00 - * channel 1 00 01 00 00 00 64 00 - * radio type 00 - * channel 01 - * scan type 00 - * min scan time 00 00 - * max scan time 64 00 - * channel 2 00 02 00 00 00 64 00 - * channel 3 00 03 00 00 00 64 00 - * channel 4 00 04 00 00 00 64 00 - * channel 5 00 05 00 00 00 64 00 - * channel 6 00 06 00 00 00 64 00 - * channel 7 00 07 00 00 00 64 00 - * channel 8 00 08 00 00 00 64 00 - * channel 9 00 09 00 00 00 64 00 - * channel 10 00 0a 00 00 00 64 00 - * channel 11 00 0b 00 00 00 64 00 - * channel 12 00 0c 00 00 00 64 00 - * channel 13 00 0d 00 00 00 64 00 - * - */ -static int lbs_scan_add_chanlist_tlv(uint8_t *tlv, - struct chanscanparamset *chan_list, - int chan_count) -{ - size_t size = sizeof(struct chanscanparamset) *chan_count; - struct mrvl_ie_chanlist_param_set *chan_tlv = (void *)tlv; - - chan_tlv->header.type = cpu_to_le16(TLV_TYPE_CHANLIST); - memcpy(chan_tlv->chanscanparam, chan_list, size); - chan_tlv->header.len = cpu_to_le16(size); - return sizeof(chan_tlv->header) + size; -} - -/* - * Add RATES TLV of the form - * - * TLV-ID RATES 01 00 - * length 0e 00 - * rates 82 84 8b 96 0c 12 18 24 30 48 60 6c - * - * The rates are in lbs_bg_rates[], but for the 802.11b - * rates the high bit isn't set. - */ -static int lbs_scan_add_rates_tlv(uint8_t *tlv) -{ - int i; - struct mrvl_ie_rates_param_set *rate_tlv = (void *)tlv; - - rate_tlv->header.type = cpu_to_le16(TLV_TYPE_RATES); - tlv += sizeof(rate_tlv->header); - for (i = 0; i < MAX_RATES; i++) { - *tlv = lbs_bg_rates[i]; - if (*tlv == 0) - break; - /* This code makes sure that the 802.11b rates (1 MBit/s, 2 - MBit/s, 5.5 MBit/s and 11 MBit/s get's the high bit set. - Note that the values are MBit/s * 2, to mark them as - basic rates so that the firmware likes it better */ - if (*tlv == 0x02 || *tlv == 0x04 || - *tlv == 0x0b || *tlv == 0x16) - *tlv |= 0x80; - tlv++; - } - rate_tlv->header.len = cpu_to_le16(i); - return sizeof(rate_tlv->header) + i; -} - -/* - * Generate the CMD_802_11_SCAN command with the proper tlv - * for a bunch of channels. - */ -static int lbs_do_scan(struct lbs_private *priv, uint8_t bsstype, - struct chanscanparamset *chan_list, int chan_count) -{ - int ret = -ENOMEM; - struct cmd_ds_802_11_scan *scan_cmd; - uint8_t *tlv; /* pointer into our current, growing TLV storage area */ - - lbs_deb_enter_args(LBS_DEB_SCAN, "bsstype %d, chanlist[].chan %d, chan_count %d", - bsstype, chan_list ? chan_list[0].channumber : -1, - chan_count); - - /* create the fixed part for scan command */ - scan_cmd = kzalloc(MAX_SCAN_CFG_ALLOC, GFP_KERNEL); - if (scan_cmd == NULL) - goto out; - - tlv = scan_cmd->tlvbuffer; - /* TODO: do we need to scan for a specific BSSID? - memcpy(scan_cmd->bssid, priv->scan_bssid, ETH_ALEN); */ - scan_cmd->bsstype = bsstype; - - /* add TLVs */ - if (priv->scan_ssid_len) - tlv += lbs_scan_add_ssid_tlv(priv, tlv); - if (chan_list && chan_count) - tlv += lbs_scan_add_chanlist_tlv(tlv, chan_list, chan_count); - tlv += lbs_scan_add_rates_tlv(tlv); - - /* This is the final data we are about to send */ - scan_cmd->hdr.size = cpu_to_le16(tlv - (uint8_t *)scan_cmd); - lbs_deb_hex(LBS_DEB_SCAN, "SCAN_CMD", (void *)scan_cmd, - sizeof(*scan_cmd)); - lbs_deb_hex(LBS_DEB_SCAN, "SCAN_TLV", scan_cmd->tlvbuffer, - tlv - scan_cmd->tlvbuffer); - - ret = __lbs_cmd(priv, CMD_802_11_SCAN, &scan_cmd->hdr, - le16_to_cpu(scan_cmd->hdr.size), - lbs_ret_80211_scan, 0); - -out: - kfree(scan_cmd); - lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret); - 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 struct lbs_private structure - * @param full_scan Do a full-scan (blocking) - * - * @return 0 or < 0 if error - */ -int lbs_scan_networks(struct lbs_private *priv, int full_scan) -{ - int ret = -ENOMEM; - struct chanscanparamset *chan_list; - struct chanscanparamset *curr_chans; - int chan_count; - uint8_t bsstype = CMD_BSS_TYPE_ANY; - int numchannels = MRVDRV_CHANNELS_PER_SCAN_CMD; - union iwreq_data wrqu; -#ifdef CONFIG_LIBERTAS_DEBUG - struct bss_descriptor *iter; - int i = 0; - DECLARE_SSID_BUF(ssid); -#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); - - /* User-specified bsstype or channel list - TODO: this can be implemented if some user-space application - need the feature. Formerly, it was accessible from debugfs, - but then nowhere used. - if (user_cfg) { - if (user_cfg->bsstype) - bsstype = user_cfg->bsstype; - } */ - - lbs_deb_scan("numchannels %d, bsstype %d\n", numchannels, bsstype); - - /* Create list of channels to scan */ - chan_list = kzalloc(sizeof(struct chanscanparamset) * - LBS_IOCTL_USER_SCAN_CHAN_MAX, GFP_KERNEL); - if (!chan_list) { - lbs_pr_alert("SCAN: chan_list empty\n"); - goto out; - } - - /* We want to scan all channels */ - chan_count = lbs_scan_create_channel_list(priv, chan_list); - - netif_stop_queue(priv->dev); - if (priv->mesh_dev) - netif_stop_queue(priv->mesh_dev); - - /* Prepare to continue an interrupted scan */ - lbs_deb_scan("chan_count %d, scan_channel %d\n", - chan_count, priv->scan_channel); - curr_chans = chan_list; - /* advance channel list by already-scanned-channels */ - if (priv->scan_channel > 0) { - curr_chans += priv->scan_channel; - chan_count -= priv->scan_channel; - } - - /* Send scan command(s) - * numchannels contains the number of channels we should maximally scan - * chan_count is the total number of channels to scan - */ - - while (chan_count) { - int to_scan = min(numchannels, chan_count); - lbs_deb_scan("scanning %d of %d channels\n", - to_scan, chan_count); - ret = lbs_do_scan(priv, bsstype, curr_chans, - to_scan); - if (ret) { - lbs_pr_err("SCAN_CMD failed\n"); - goto out2; - } - curr_chans += to_scan; - chan_count -= to_scan; - - /* somehow schedule the next part of the scan */ - if (chan_count && !full_scan && - !priv->surpriseremoved) { - /* -1 marks just that we're currently scanning */ - if (priv->scan_channel < 0) - priv->scan_channel = to_scan; - else - priv->scan_channel += to_scan; - cancel_delayed_work(&priv->scan_work); - queue_delayed_work(priv->work_thread, &priv->scan_work, - msecs_to_jiffies(300)); - /* skip over GIWSCAN event */ - goto out; - } - - } - memset(&wrqu, 0, sizeof(union iwreq_data)); - wireless_send_event(priv->dev, SIOCGIWSCAN, &wrqu, NULL); - -#ifdef CONFIG_LIBERTAS_DEBUG - /* Dump the scan table */ - mutex_lock(&priv->lock); - lbs_deb_scan("scan table:\n"); - list_for_each_entry(iter, &priv->network_list, list) - lbs_deb_scan("%02d: BSSID %pM, RSSI %d, SSID '%s'\n", - i++, iter->bssid, iter->rssi, - print_ssid(ssid, iter->ssid, iter->ssid_len)); - mutex_unlock(&priv->lock); -#endif - -out2: - priv->scan_channel = 0; - -out: - if (priv->connect_status == LBS_CONNECTED && !priv->tx_pending_len) - netif_wake_queue(priv->dev); - - if (priv->mesh_dev && lbs_mesh_connected(priv) && - !priv->tx_pending_len) - netif_wake_queue(priv->mesh_dev); - - kfree(chan_list); - - lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret); - return ret; -} - -void lbs_scan_worker(struct work_struct *work) -{ - struct lbs_private *priv = - container_of(work, struct lbs_private, scan_work.work); - - lbs_deb_enter(LBS_DEB_SCAN); - lbs_scan_networks(priv, 0); - lbs_deb_leave(LBS_DEB_SCAN); -} - - -/*********************************************************************/ -/* */ -/* Result interpretation */ -/* */ -/*********************************************************************/ - -/** - * @brief Interpret a BSS scan response returned from the firmware - * - * Parse the various fixed fields and IEs passed back for a a BSS probe - * response or beacon from the scan command. Record information as needed - * in the scan table struct bss_descriptor for that entry. - * - * @param bss Output parameter: Pointer to the BSS Entry - * - * @return 0 or -1 - */ -static int lbs_process_bss(struct bss_descriptor *bss, - uint8_t **pbeaconinfo, int *bytesleft) -{ - struct ieee_ie_fh_param_set *fh; - struct ieee_ie_ds_param_set *ds; - struct ieee_ie_cf_param_set *cf; - struct ieee_ie_ibss_param_set *ibss; - DECLARE_SSID_BUF(ssid); - uint8_t *pos, *end, *p; - uint8_t n_ex_rates = 0, got_basic_rates = 0, n_basic_rates = 0; - uint16_t beaconsize = 0; - int ret; - - lbs_deb_enter(LBS_DEB_SCAN); - - if (*bytesleft >= sizeof(beaconsize)) { - /* Extract & convert beacon size from the command buffer */ - beaconsize = get_unaligned_le16(*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: BSSID %pM\n", 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 %d\n", *pos); - pos++; - - /* time stamp is 8 bytes long */ - pos += 8; - - /* beacon interval is 2 bytes long */ - bss->beaconperiod = get_unaligned_le16(pos); - pos += 2; - - /* capability information is 2 bytes long */ - bss->capability = get_unaligned_le16(pos); - lbs_deb_scan("process_bss: capabilities 0x%04x\n", bss->capability); - pos += 2; - - if (bss->capability & WLAN_CAPABILITY_PRIVACY) - lbs_deb_scan("process_bss: WEP enabled\n"); - if (bss->capability & WLAN_CAPABILITY_IBSS) - bss->mode = IW_MODE_ADHOC; - else - bss->mode = IW_MODE_INFRA; - - /* rest of the current buffer are IE's */ - lbs_deb_scan("process_bss: IE len %zd\n", end - pos); - lbs_deb_hex(LBS_DEB_SCAN, "process_bss: IE info", pos, end - pos); - - /* process variable IE */ - while (pos <= end - 2) { - if (pos + pos[1] > end) { - lbs_deb_scan("process_bss: error in processing IE, " - "bytes left < IE length\n"); - break; - } - - switch (pos[0]) { - case WLAN_EID_SSID: - bss->ssid_len = min_t(int, IEEE80211_MAX_SSID_LEN, pos[1]); - memcpy(bss->ssid, pos + 2, bss->ssid_len); - lbs_deb_scan("got SSID IE: '%s', len %u\n", - print_ssid(ssid, bss->ssid, bss->ssid_len), - bss->ssid_len); - break; - - case WLAN_EID_SUPP_RATES: - n_basic_rates = min_t(uint8_t, MAX_RATES, pos[1]); - memcpy(bss->rates, pos + 2, n_basic_rates); - got_basic_rates = 1; - lbs_deb_scan("got RATES IE\n"); - break; - - case WLAN_EID_FH_PARAMS: - fh = (struct ieee_ie_fh_param_set *) pos; - memcpy(&bss->phy.fh, fh, sizeof(*fh)); - lbs_deb_scan("got FH IE\n"); - break; - - case WLAN_EID_DS_PARAMS: - ds = (struct ieee_ie_ds_param_set *) pos; - bss->channel = ds->channel; - memcpy(&bss->phy.ds, ds, sizeof(*ds)); - lbs_deb_scan("got DS IE, channel %d\n", bss->channel); - break; - - case WLAN_EID_CF_PARAMS: - cf = (struct ieee_ie_cf_param_set *) pos; - memcpy(&bss->ss.cf, cf, sizeof(*cf)); - lbs_deb_scan("got CF IE\n"); - break; - - case WLAN_EID_IBSS_PARAMS: - ibss = (struct ieee_ie_ibss_param_set *) pos; - bss->atimwindow = ibss->atimwindow; - memcpy(&bss->ss.ibss, ibss, sizeof(*ibss)); - lbs_deb_scan("got IBSS IE\n"); - break; - - case WLAN_EID_EXT_SUPP_RATES: - /* only process extended supported rate if data rate is - * already found. Data rate IE should come before - * extended supported rate IE - */ - lbs_deb_scan("got RATESEX IE\n"); - if (!got_basic_rates) { - lbs_deb_scan("... but ignoring it\n"); - break; - } - - n_ex_rates = pos[1]; - 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, pos + 2, n_ex_rates); - break; - - case WLAN_EID_GENERIC: - if (pos[1] >= 4 && - pos[2] == 0x00 && pos[3] == 0x50 && - pos[4] == 0xf2 && pos[5] == 0x01) { - bss->wpa_ie_len = min(pos[1] + 2, MAX_WPA_IE_LEN); - memcpy(bss->wpa_ie, pos, bss->wpa_ie_len); - lbs_deb_scan("got WPA IE\n"); - lbs_deb_hex(LBS_DEB_SCAN, "WPA IE", bss->wpa_ie, - bss->wpa_ie_len); - } else if (pos[1] >= MARVELL_MESH_IE_LENGTH && - pos[2] == 0x00 && pos[3] == 0x50 && - pos[4] == 0x43 && pos[5] == 0x04) { - lbs_deb_scan("got mesh IE\n"); - bss->mesh = 1; - } else { - lbs_deb_scan("got generic IE: %02x:%02x:%02x:%02x, len %d\n", - pos[2], pos[3], - pos[4], pos[5], - pos[1]); - } - break; - - case WLAN_EID_RSN: - lbs_deb_scan("got RSN IE\n"); - bss->rsn_ie_len = min(pos[1] + 2, MAX_WPA_IE_LEN); - memcpy(bss->rsn_ie, pos, bss->rsn_ie_len); - lbs_deb_hex(LBS_DEB_SCAN, "process_bss: RSN_IE", - bss->rsn_ie, bss->rsn_ie_len); - break; - - default: - lbs_deb_scan("got IE 0x%04x, len %d\n", - pos[0], pos[1]); - break; - } - - pos += pos[1] + 2; - } - - /* Timestamp */ - bss->last_scanned = jiffies; - lbs_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 Send a scan command for all available channels filtered on a spec - * - * Used in association code and from debugfs - * - * @param priv A pointer to struct lbs_private structure - * @param ssid A pointer to the SSID to scan for - * @param ssid_len Length of the SSID - * - * @return 0-success, otherwise fail - */ -int lbs_send_specific_ssid_scan(struct lbs_private *priv, uint8_t *ssid, - uint8_t ssid_len) -{ - DECLARE_SSID_BUF(ssid_buf); - int ret = 0; - - lbs_deb_enter_args(LBS_DEB_SCAN, "SSID '%s'\n", - print_ssid(ssid_buf, ssid, ssid_len)); - - if (!ssid_len) - goto out; - - memcpy(priv->scan_ssid, ssid, ssid_len); - priv->scan_ssid_len = ssid_len; - - lbs_scan_networks(priv, 1); - if (priv->surpriseremoved) { - ret = -1; - goto out; - } - -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 *lbs_translate_scan(struct lbs_private *priv, - struct iw_request_info *info, - char *start, char *stop, - struct bss_descriptor *bss) -{ - struct chan_freq_power *cfp; - char *current_val; /* For rates */ - struct iw_event iwe; /* Temporary buffer */ - int j; -#define PERFECT_RSSI ((uint8_t)50) -#define WORST_RSSI ((uint8_t)0) -#define RSSI_DIFF ((uint8_t)(PERFECT_RSSI - WORST_RSSI)) - uint8_t rssi; - - lbs_deb_enter(LBS_DEB_SCAN); - - cfp = lbs_find_cfp_by_band_and_channel(priv, 0, bss->channel); - if (!cfp) { - lbs_deb_scan("Invalid channel number %d\n", bss->channel); - start = NULL; - goto out; - } - - /* First entry *MUST* be the BSSID */ - iwe.cmd = SIOCGIWAP; - iwe.u.ap_addr.sa_family = ARPHRD_ETHER; - memcpy(iwe.u.ap_addr.sa_data, &bss->bssid, ETH_ALEN); - start = iwe_stream_add_event(info, start, stop, &iwe, IW_EV_ADDR_LEN); - - /* SSID */ - iwe.cmd = SIOCGIWESSID; - iwe.u.data.flags = 1; - iwe.u.data.length = min((uint32_t) bss->ssid_len, (uint32_t) IEEE80211_MAX_SSID_LEN); - start = iwe_stream_add_point(info, start, stop, &iwe, bss->ssid); - - /* Mode */ - iwe.cmd = SIOCGIWMODE; - iwe.u.mode = bss->mode; - start = iwe_stream_add_event(info, 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(info, 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 (priv->NF[TYPE_BEACON][TYPE_NOAVG] == 0) { - iwe.u.qual.noise = MRVDRV_NF_DEFAULT_SCAN_VALUE; - } else { - iwe.u.qual.noise = CAL_NF(priv->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 ((priv->mode == IW_MODE_ADHOC) && priv->adhoccreate - && !lbs_ssid_cmp(priv->curbssparams.ssid, - priv->curbssparams.ssid_len, - bss->ssid, bss->ssid_len)) { - int snr, nf; - snr = priv->SNR[TYPE_RXPD][TYPE_AVG] / AVG_SCALE; - nf = priv->NF[TYPE_RXPD][TYPE_AVG] / AVG_SCALE; - iwe.u.qual.level = CAL_RSSI(snr, nf); - } - start = iwe_stream_add_event(info, 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(info, start, stop, &iwe, bss->ssid); - - current_val = start + iwe_stream_lcp_len(info); - - iwe.cmd = SIOCGIWRATE; - iwe.u.bitrate.fixed = 0; - iwe.u.bitrate.disabled = 0; - iwe.u.bitrate.value = 0; - - for (j = 0; j < ARRAY_SIZE(bss->rates) && bss->rates[j]; j++) { - /* Bit rate given in 500 kb/s units */ - iwe.u.bitrate.value = bss->rates[j] * 500000; - current_val = iwe_stream_add_value(info, start, current_val, - stop, &iwe, IW_EV_PARAM_LEN); - } - if ((bss->mode == IW_MODE_ADHOC) && priv->adhoccreate - && !lbs_ssid_cmp(priv->curbssparams.ssid, - priv->curbssparams.ssid_len, - bss->ssid, bss->ssid_len)) { - iwe.u.bitrate.value = 22 * 500000; - current_val = iwe_stream_add_value(info, start, current_val, - stop, &iwe, IW_EV_PARAM_LEN); - } - /* Check if we added any event */ - if ((current_val - start) > iwe_stream_lcp_len(info)) - 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(info, 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(info, start, stop, &iwe, buf); - } - - if (bss->mesh) { - char custom[MAX_CUSTOM_LEN]; - char *p = custom; - - iwe.cmd = IWEVCUSTOM; - p += snprintf(p, MAX_CUSTOM_LEN, "mesh-type: olpc"); - iwe.u.data.length = p - custom; - if (iwe.u.data.length) - start = iwe_stream_add_point(info, start, stop, - &iwe, custom); - } - -out: - lbs_deb_leave_args(LBS_DEB_SCAN, "start %p", start); - return start; -} - - -/** - * @brief Handle Scan Network ioctl - * - * @param dev A pointer to net_device structure - * @param info A pointer to iw_request_info structure - * @param vwrq A pointer to iw_param structure - * @param extra A pointer to extra data buf - * - * @return 0 --success, otherwise fail - */ -int lbs_set_scan(struct net_device *dev, struct iw_request_info *info, - union iwreq_data *wrqu, char *extra) -{ - DECLARE_SSID_BUF(ssid); - struct lbs_private *priv = dev->ml_priv; - int ret = 0; - - lbs_deb_enter(LBS_DEB_WEXT); - - if (!priv->radio_on) { - ret = -EINVAL; - goto out; - } - - if (!netif_running(dev)) { - ret = -ENETDOWN; - goto out; - } - - /* mac80211 does this: - struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); - if (sdata->type != IEEE80211_IF_TYPE_xxx) { - ret = -EOPNOTSUPP; - goto out; - } - */ - - if (wrqu->data.length == sizeof(struct iw_scan_req) && - wrqu->data.flags & IW_SCAN_THIS_ESSID) { - struct iw_scan_req *req = (struct iw_scan_req *)extra; - priv->scan_ssid_len = req->essid_len; - memcpy(priv->scan_ssid, req->essid, priv->scan_ssid_len); - lbs_deb_wext("set_scan, essid '%s'\n", - print_ssid(ssid, priv->scan_ssid, priv->scan_ssid_len)); - } else { - priv->scan_ssid_len = 0; - } - - if (!delayed_work_pending(&priv->scan_work)) - queue_delayed_work(priv->work_thread, &priv->scan_work, - msecs_to_jiffies(50)); - /* set marker that currently a scan is taking place */ - priv->scan_channel = -1; - - if (priv->surpriseremoved) - ret = -EIO; - -out: - lbs_deb_leave_args(LBS_DEB_WEXT, "ret %d", ret); - return ret; -} - - -/** - * @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 lbs_get_scan(struct net_device *dev, struct iw_request_info *info, - struct iw_point *dwrq, char *extra) -{ -#define SCAN_ITEM_SIZE 128 - struct lbs_private *priv = dev->ml_priv; - 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_WEXT); - - /* iwlist should wait until the current scan is finished */ - if (priv->scan_channel) - return -EAGAIN; - - /* Update RSSI if current BSS is a locally created ad-hoc BSS */ - if ((priv->mode == IW_MODE_ADHOC) && priv->adhoccreate) { - err = lbs_prepare_and_send_command(priv, CMD_802_11_RSSI, 0, - CMD_OPTION_WAITFORRSP, 0, NULL); - if (err) - goto out; - } - - mutex_lock(&priv->lock); - list_for_each_entry_safe (iter_bss, safe, &priv->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, &priv->network_free_list); - clear_bss_descriptor(iter_bss); - continue; - } - - /* Translate to WE format this entry */ - next_ev = lbs_translate_scan(priv, info, ev, stop, iter_bss); - if (next_ev == NULL) - continue; - ev = next_ev; - } - mutex_unlock(&priv->lock); - - dwrq->length = (ev - extra); - dwrq->flags = 0; -out: - lbs_deb_leave_args(LBS_DEB_WEXT, "ret %d", err); - return err; -} - - - - -/*********************************************************************/ -/* */ -/* Command execution */ -/* */ -/*********************************************************************/ - - -/** - * @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 struct lbs_private structure - * @param resp A pointer to cmd_ds_command - * - * @return 0 or -1 - */ -static int lbs_ret_80211_scan(struct lbs_private *priv, unsigned long dummy, - struct cmd_header *resp) -{ - struct cmd_ds_802_11_scan_rsp *scanresp = (void *)resp; - struct bss_descriptor *iter_bss; - struct bss_descriptor *safe; - uint8_t *bssinfo; - uint16_t 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, &priv->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, &priv->network_free_list); - clear_bss_descriptor(iter_bss); - } - - if (scanresp->nr_sets > MAX_NETWORK_COUNT) { - lbs_deb_scan("SCAN_RESP: too many scan results (%d, max %d)\n", - scanresp->nr_sets, MAX_NETWORK_COUNT); - ret = -1; - goto done; - } - - bytesleft = get_unaligned_le16(&scanresp->bssdescriptsize); - lbs_deb_scan("SCAN_RESP: bssdescriptsize %d\n", bytesleft); - - scanrespsize = le16_to_cpu(resp->size); - lbs_deb_scan("SCAN_RESP: scan results %d\n", scanresp->nr_sets); - - bssinfo = scanresp->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 (sizeof(struct cmd_header)) - */ - tlvbufsize = scanrespsize - (bytesleft + sizeof(scanresp->bssdescriptsize) - + sizeof(scanresp->nr_sets) - + sizeof(struct cmd_header)); - - /* - * Process each scan response returned (scanresp->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 < scanresp->nr_sets && bytesleft; idx++) { - struct bss_descriptor new; - struct bss_descriptor *found = NULL; - struct bss_descriptor *oldest = NULL; - - /* Process the data fields and IEs returned for this BSS */ - memset(&new, 0, sizeof (struct bss_descriptor)); - if (lbs_process_bss(&new, &bssinfo, &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, &priv->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(&priv->network_free_list)) { - /* Pull one from the free list */ - found = list_entry(priv->network_free_list.next, - struct bss_descriptor, list); - list_move_tail(&found->list, &priv->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, &priv->network_list); - } else { - continue; - } - - lbs_deb_scan("SCAN_RESP: BSSID %pM\n", 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; -} |
