+++ /dev/null
-/**
- * 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/etherdevice.h>
-#include <asm/unaligned.h>
-
-#include "host.h"
-#include "decl.h"
-#include "dev.h"
-#include "scan.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 \
- + 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 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
-
-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));
-}
-
-
-
-
-/*********************************************************************/
-/* */
-/* 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->enable11d && (priv->connect_status != LBS_CONNECTED)
- && (priv->mesh_connect_status != LBS_CONNECTED)) {
- /* Scan all the supported chan for the first scan */
- if (!priv->universal_channel[rgnidx].valid)
- continue;
- scanregion = &priv->universal_channel[rgnidx];
-
- /* clear the parsed_region_chan for the first scan */
- memset(&priv->parsed_region_chan, 0x00,
- sizeof(priv->parsed_region_chan));
- } else {
- 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 (priv->enable11d)
- scantype = lbs_get_scan_type_11d(cfp->channel,
- &priv->parsed_region_chan);
-
- 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 mrvlietypes_ssidparamset *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 mrvlietypes_chanlistparamset *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 mrvlietypes_ratesparamset *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_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);
-
- /* 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);
- netif_carrier_off(priv->dev);
- if (priv->mesh_dev) {
- netif_stop_queue(priv->mesh_dev);
- netif_carrier_off(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 %s, RSSI %d, SSID '%s'\n",
- i++, print_mac(mac, iter->bssid), iter->rssi,
- escape_essid(iter->ssid, iter->ssid_len));
- mutex_unlock(&priv->lock);
-#endif
-
-out2:
- priv->scan_channel = 0;
-
-out:
- if (priv->connect_status == LBS_CONNECTED) {
- netif_carrier_on(priv->dev);
- if (!priv->tx_pending_len)
- netif_wake_queue(priv->dev);
- }
- if (priv->mesh_dev && (priv->mesh_connect_status == LBS_CONNECTED)) {
- netif_carrier_on(priv->mesh_dev);
- if (!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 ieeetypes_fhparamset *pFH;
- struct ieeetypes_dsparamset *pDS;
- struct ieeetypes_cfparamset *pCF;
- struct ieeetypes_ibssparamset *pibss;
- DECLARE_MAC_BUF(mac);
- struct ieeetypes_countryinfoset *pcountryinfo;
- 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 %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 %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) {
- struct ieee80211_info_element * elem = (void *)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("got SSID IE: '%s', len %u\n",
- escape_essid(bss->ssid, bss->ssid_len),
- bss->ssid_len);
- break;
-
- case MFIE_TYPE_RATES:
- n_basic_rates = min_t(uint8_t, MAX_RATES, elem->len);
- memcpy(bss->rates, elem->data, n_basic_rates);
- got_basic_rates = 1;
- lbs_deb_scan("got RATES IE\n");
- break;
-
- case MFIE_TYPE_FH_SET:
- pFH = (struct ieeetypes_fhparamset *) pos;
- memmove(&bss->phyparamset.fhparamset, pFH,
- sizeof(struct ieeetypes_fhparamset));
- lbs_deb_scan("got FH IE\n");
- break;
-
- case MFIE_TYPE_DS_SET:
- pDS = (struct ieeetypes_dsparamset *) pos;
- bss->channel = pDS->currentchan;
- memcpy(&bss->phyparamset.dsparamset, pDS,
- sizeof(struct ieeetypes_dsparamset));
- lbs_deb_scan("got DS IE, channel %d\n", bss->channel);
- break;
-
- case MFIE_TYPE_CF_SET:
- pCF = (struct ieeetypes_cfparamset *) pos;
- memcpy(&bss->ssparamset.cfparamset, pCF,
- sizeof(struct ieeetypes_cfparamset));
- lbs_deb_scan("got CF IE\n");
- break;
-
- case MFIE_TYPE_IBSS_SET:
- pibss = (struct ieeetypes_ibssparamset *) pos;
- bss->atimwindow = le16_to_cpu(pibss->atimwindow);
- memmove(&bss->ssparamset.ibssparamset, pibss,
- sizeof(struct ieeetypes_ibssparamset));
- lbs_deb_scan("got IBSS IE\n");
- break;
-
- case MFIE_TYPE_COUNTRY:
- pcountryinfo = (struct ieeetypes_countryinfoset *) pos;
- lbs_deb_scan("got COUNTRY IE\n");
- if (pcountryinfo->len < sizeof(pcountryinfo->countrycode)
- || pcountryinfo->len > 254) {
- lbs_deb_scan("process_bss: 11D- Err CountryInfo len %d, min %zd, max 254\n",
- 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",
- (uint8_t *) pcountryinfo,
- (int) (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
- */
- lbs_deb_scan("got RATESEX IE\n");
- if (!got_basic_rates) {
- lbs_deb_scan("... but ignoring it\n");
- break;
- }
-
- n_ex_rates = elem->len;
- if (n_basic_rates + n_ex_rates > MAX_RATES)
- 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_scan("got WPA IE\n");
- lbs_deb_hex(LBS_DEB_SCAN, "WPA IE", bss->wpa_ie, elem->len);
- } else if (elem->len >= MARVELL_MESH_IE_LENGTH &&
- elem->data[0] == 0x00 && elem->data[1] == 0x50 &&
- elem->data[2] == 0x43 && elem->data[3] == 0x04) {
- lbs_deb_scan("got mesh IE\n");
- bss->mesh = 1;
- } else {
- lbs_deb_scan("got generic IE: %02x:%02x:%02x:%02x, len %d\n",
- elem->data[0], elem->data[1],
- elem->data[2], elem->data[3],
- elem->len);
- }
- break;
-
- case MFIE_TYPE_RSN:
- lbs_deb_scan("got RSN IE\n");
- bss->rsn_ie_len = min(elem->len + 2, MAX_WPA_IE_LEN);
- memcpy(bss->rsn_ie, elem, bss->rsn_ie_len);
- lbs_deb_hex(LBS_DEB_SCAN, "process_bss: RSN_IE",
- bss->rsn_ie, elem->len);
- break;
-
- default:
- lbs_deb_scan("got IE 0x%04x, len %d\n",
- elem->id, elem->len);
- break;
- }
-
- pos += elem->len + 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)
-{
- int ret = 0;
-
- lbs_deb_enter_args(LBS_DEB_SCAN, "SSID '%s'\n",
- escape_essid(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,
- 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(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) 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 (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(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) && 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(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, "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 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)
-{
- struct lbs_private *priv = dev->priv;
- int ret = 0;
-
- lbs_deb_enter(LBS_DEB_WEXT);
-
- 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",
- escape_essid(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->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)
- lbs_prepare_and_send_command(priv, CMD_802_11_RSSI, 0,
- CMD_OPTION_WAITFORRSP, 0, NULL);
-
- 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, ev, stop, iter_bss);
- if (next_ev == NULL)
- continue;
- ev = next_ev;
- }
- mutex_unlock(&priv->lock);
-
- dwrq->length = (ev - extra);
- dwrq->flags = 0;
-
- 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 = le16_to_cpu(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 (S_DS_GEN)
- */
- tlvbufsize = scanrespsize - (bytesleft + sizeof(scanresp->bssdescriptsize)
- + sizeof(scanresp->nr_sets)
- + S_DS_GEN);
-
- /*
- * 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;
- DECLARE_MAC_BUF(mac);
-
- /* 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 %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;
-}
projects / openwrt / svn-archive / archive.git / blobdiff