Johannes, > The real question is: why the hell is it probing the AP? > I agree -- the spurious probing is strange. But I also have to admit > that basically I don't care as long as it works -- most of this is just > a side effect of how wireless extensions work. I have further investigated the roaming issues and found two problems. First ieee80211_rx_mgmt_deauth() and ieee80211_rx_mgmt_disassoc() sets a retry state at the same time as they tells the wpa_supplicant that the AP is gone. Patch lae-mac80211-rm-direct-probe.patch addresses this problem. Second problem address the auto scan function in ieee80211_sta_config_auth(). When an incomplete AP information is found, it start a new scan. This scan will delay the actions taken by the wpa_supplicant for the scan period. Patch lae-mac80211-rm-extra-scan-request.patch addresses this problem. I do not have the knowledge to judge if the patch is correctly applied/located, but they sure give the desired effect. Old roaming time was 4,5 seconds for 13 channels and with the above patches it is down to 400ms for 3 channels. See trace below. > I would suggest you just use wpa_supplicant -Dnl80211, which > should help > a lot with this kind of things. I need to patch the kernel for this, rigth ? Where can I get appropriate patches? /Lars ----- [ 124.597307] wlan0: deauthenticated (Reason: 1) [ 124.597341] LaE: [ieee80211_rx_mgmt_deauth] do not set IEEE80211_STA_MLME_DIRECT_PROBE [ 124.699253] [B] LaE: SCANRQUEST: SSID=AGV [ 124.699298] LaE: [ieee80211_request_scan(568)] set IEEE80211_STA_REQ_SCAN [ 124.699456] ieee80211_start_scan: enter [ 124.919184] ieee80211_scan_completed: enter [ 124.919577] [B] LaE: SCANRESULT: BSSID=00:08:21:31:53:87, SSID=AGV , ch=11, , q= 0, l= 0(-56dBm), n= 0 [ 124.919655] [B] LaE: SCANRESULT: BSSID=00:08:21:31:53:87, SSID= , ch=11, , q= 0, l= 0(-56dBm), n= 0 [ 124.919726] [B] LaE: SCANRESULT: BSSID=00:40:96:a0:e7:e7, SSID=AGV , ch= 1, , q= 0, l= 0(-36dBm), n= 0 [ 124.919978] ieee80211_ioctl_siwauth: enter [ 124.920053] ieee80211_ioctl_siwencodeext: enter [ 124.920084] ieee80211_set_encryption: enter [ 124.920177] ieee80211_ioctl_siwencodeext: enter [ 124.920210] ieee80211_set_encryption: enter [ 124.920262] ieee80211_ioctl_siwencodeext: enter [ 124.920291] ieee80211_set_encryption: enter [ 124.920341] ieee80211_ioctl_siwencodeext: enter [ 124.920370] ieee80211_set_encryption: enter [ 124.920421] ieee80211_ioctl_siwencodeext: enter [ 124.920449] ieee80211_set_encryption: enter [ 124.920667] ieee80211_ioctl_siwencodeext: enter [ 124.920704] ieee80211_set_encryption: enter [ 124.920774] ieee80211_ioctl_siwauth: enter [ 124.921454] ieee80211_ioctl_siwgenie: enter [ 124.921518] ieee80211_ioctl_siwauth: enter [ 124.921560] ieee80211_ioctl_siwauth: enter [ 124.921598] ieee80211_ioctl_siwauth: enter [ 124.921637] ieee80211_ioctl_siwauth: enter [ 124.921674] ieee80211_ioctl_siwauth: enter [ 124.921712] ieee80211_ioctl_siwauth: enter [ 124.921755] ieee80211_ioctl_siwfreq: enter freq=241200000 [ 124.951244] LaE: [ieee80211_sta_config_auth(1847)] disable ieee80211_start_scan [ 124.951456] ieee80211_ioctl_siwessid: enter ssid=AGV [ 124.951553] LaE: [ieee80211_sta_config_auth(1847)] disable ieee80211_start_scan [ 124.951641] ieee80211_ioctl_siwap: enter AP=00:40:96:a0:e7:e7 [ 124.959261] wlan0: authenticate with AP 00:40:96:a0:e7:e7 [ 124.960678] wlan0: authenticated [ 124.960717] wlan0: associate with AP 00:40:96:a0:e7:e7 [ 124.962865] wlan0: RX ReassocResp from 00:40:96:a0:e7:e7 (capab=0x431 status=0 aid=6) [ 124.962907] wlan0: associated
Attachment:
lae-mac80211-rm-extra-scan-request.patch
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Attachment:
lae-mac80211-rm-direct-probe.patch
Description: Binary data
