| /** |
| * 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" |
| #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 match_bss_no_security(struct lbs_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; |
| else |
| return 0; |
| } |
| |
| static inline int match_bss_static_wep(struct lbs_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; |
| else |
| return 0; |
| } |
| |
| static inline int match_bss_wpa(struct lbs_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; |
| else |
| return 0; |
| } |
| |
| static inline int match_bss_wpa2(struct lbs_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; |
| else |
| return 0; |
| } |
| |
| static inline int match_bss_dynamic_wep(struct lbs_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; |
| else |
| 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 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 priv A pointer to struct lbs_private |
| * @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(struct lbs_private *priv, |
| struct bss_descriptor *bss, uint8_t mode) |
| { |
| int matched = 0; |
| |
| lbs_deb_enter(LBS_DEB_SCAN); |
| |
| if (bss->mode != mode) |
| goto done; |
| |
| if ((matched = match_bss_no_security(&priv->secinfo, bss))) { |
| goto done; |
| } else if ((matched = match_bss_static_wep(&priv->secinfo, bss))) { |
| goto done; |
| } else if ((matched = match_bss_wpa(&priv->secinfo, bss))) { |
| lbs_deb_scan("is_network_compatible() WPA: wpa_ie 0x%x " |
| "wpa2_ie 0x%x WEP %s WPA %s WPA2 %s " |
| "privacy 0x%x\n", bss->wpa_ie[0], bss->rsn_ie[0], |
| priv->secinfo.wep_enabled ? "e" : "d", |
| priv->secinfo.WPAenabled ? "e" : "d", |
| priv->secinfo.WPA2enabled ? "e" : "d", |
| (bss->capability & WLAN_CAPABILITY_PRIVACY)); |
| goto done; |
| } else if ((matched = match_bss_wpa2(&priv->secinfo, bss))) { |
| lbs_deb_scan("is_network_compatible() WPA2: wpa_ie 0x%x " |
| "wpa2_ie 0x%x WEP %s WPA %s WPA2 %s " |
| "privacy 0x%x\n", bss->wpa_ie[0], bss->rsn_ie[0], |
| priv->secinfo.wep_enabled ? "e" : "d", |
| priv->secinfo.WPAenabled ? "e" : "d", |
| priv->secinfo.WPA2enabled ? "e" : "d", |
| (bss->capability & WLAN_CAPABILITY_PRIVACY)); |
| goto done; |
| } else if ((matched = match_bss_dynamic_wep(&priv->secinfo, bss))) { |
| lbs_deb_scan("is_network_compatible() dynamic WEP: " |
| "wpa_ie 0x%x wpa2_ie 0x%x privacy 0x%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 0x%x " |
| "wpa2_ie 0x%x WEP %s WPA %s WPA2 %s privacy 0x%x\n", |
| bss->wpa_ie[0], bss->rsn_ie[0], |
| priv->secinfo.wep_enabled ? "e" : "d", |
| priv->secinfo.WPAenabled ? "e" : "d", |
| priv->secinfo.WPA2enabled ? "e" : "d", |
| (bss->capability & WLAN_CAPABILITY_PRIVACY)); |
| |
| done: |
| lbs_deb_leave_args(LBS_DEB_SCAN, "matched: %d", matched); |
| return matched; |
| } |
| |
| |
| |
| /*********************************************************************/ |
| /* */ |
| /* 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[0].channumber, 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 |
| * |
| * 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 struct lbs_private structure |
| * @param full_scan Do a full-scan (blocking) |
| * |
| * @return 0 or < 0 if error |
| */ |
| static 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), (int)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 = le16_to_cpu(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 = 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%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 This function finds a specific compatible BSSID in the scan list |
| * |
| * Used in association code |
| * |
| * @param priv A pointer to struct lbs_private |
| * @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 *lbs_find_bssid_in_list(struct lbs_private *priv, |
| uint8_t *bssid, uint8_t 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(&priv->lock); |
| list_for_each_entry (iter_bss, &priv->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(priv, iter_bss, mode)) |
| break; |
| found_bss = iter_bss; |
| break; |
| default: |
| found_bss = iter_bss; |
| break; |
| } |
| } |
| mutex_unlock(&priv->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 priv A pointer to struct lbs_private |
| * @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 *lbs_find_ssid_in_list(struct lbs_private *priv, |
| uint8_t *ssid, uint8_t ssid_len, |
| uint8_t *bssid, uint8_t mode, |
| int channel) |
| { |
| uint8_t 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(&priv->lock); |
| |
| list_for_each_entry (iter_bss, &priv->network_list, list) { |
| if ( !tmp_oldest |
| || (iter_bss->last_scanned < tmp_oldest->last_scanned)) |
| tmp_oldest = iter_bss; |
| |
| if (lbs_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(priv, 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(&priv->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 priv A pointer to struct lbs_private |
| * |
| * @return index in BSSID list |
| */ |
| static struct bss_descriptor *lbs_find_best_ssid_in_list(struct lbs_private *priv, |
| uint8_t mode) |
| { |
| uint8_t bestrssi = 0; |
| struct bss_descriptor *iter_bss; |
| struct bss_descriptor *best_bss = NULL; |
| |
| lbs_deb_enter(LBS_DEB_SCAN); |
| |
| mutex_lock(&priv->lock); |
| |
| list_for_each_entry (iter_bss, &priv->network_list, list) { |
| switch (mode) { |
| case IW_MODE_INFRA: |
| case IW_MODE_ADHOC: |
| if (!is_network_compatible(priv, 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(&priv->lock); |
| lbs_deb_leave_args(LBS_DEB_SCAN, "best_bss %p", best_bss); |
| return best_bss; |
| } |
| |
| /** |
| * @brief Find the best AP |
| * |
| * Used from association worker. |
| * |
| * @param priv A pointer to struct lbs_private structure |
| * @param pSSID A pointer to AP's ssid |
| * |
| * @return 0--success, otherwise--fail |
| */ |
| int lbs_find_best_network_ssid(struct lbs_private *priv, uint8_t *out_ssid, |
| uint8_t *out_ssid_len, uint8_t preferred_mode, |
| uint8_t *out_mode) |
| { |
| int ret = -1; |
| struct bss_descriptor *found; |
| |
| lbs_deb_enter(LBS_DEB_SCAN); |
| |
| priv->scan_ssid_len = 0; |
| lbs_scan_networks(priv, 1); |
| if (priv->surpriseremoved) |
| goto out; |
| |
| found = lbs_find_best_ssid_in_list(priv, 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 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; |
| } |