B.A.T.M.A.N

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[B.A.T.M.A.N.] batman-adv and 11n speed
by xxiao 06 Jul '09

06 Jul '09

Hi, I'm using Openwrt/compat-wireless-2009-06-25 on a AR7161 board. I'm using ath9k trying to get 11n speed for batman-adv working. All code is from openwrt trunk. >From the debugfs of mac80211/ath9k, I can see under IBSS mode, the rcstat reports speed up to 300mbps. I have batman-adv enabled. However after a second board with the same software booted up, both boards' rcstat output showed a speed of 11g only, an immediate drop from 11n to 11g. It's like the second batman-adv somehow forced a 11g speed after it "talked" to the first batman-adv board. Any help is appreciated! xxiao Before the second batman-adv is booted up: root@OpenWrt:/# cat /mnt/ath9k/phy0/rcstat Rate Success Retries XRetries PER 1.0: 0 0 0 0 2.0: 0 0 0 0 5.5: 0 0 0 0 11.0: 0 0 0 0 6.0: 0 0 0 0 9.0: 0 0 0 0 12.0: 0 0 0 0 18.0: 0 0 0 0 24.0: 0 0 0 0 36.0: 0 0 0 0 48.0: 0 0 0 0 54.0: 0 0 0 0 6.5: 0 0 0 0 13.0: 0 0 0 0 19.5: 0 0 0 0 26.0: 0 0 0 0 39.0: 0 0 0 0 52.0: 0 0 0 0 58.5: 0 0 0 0 65.0: 0 0 0 0 13.0: 0 0 0 0 26.0: 0 0 0 0 39.0: 0 0 0 0 52.0: 0 0 0 0 78.0: 0 0 0 0 104.0: 0 0 0 0 117.0: 0 0 0 0 130.0: 0 0 0 0 13.5: 0 0 0 0 27.5: 0 0 0 0 40.5: 0 0 0 0 54.0: 0 0 0 0 81.5: 0 0 0 0 108.0: 0 0 0 0 121.5: 0 0 0 0 135.0: 0 0 0 0 150.0: 0 0 0 0 27.0: 0 0 0 0 54.0: 0 0 0 0 81.0: 0 0 0 0 108.0: 0 0 0 0 162.0: 0 0 0 0 216.0: 0 0 0 0 243.0: 0 0 0 0 270.0: 0 0 0 0 300.0: 0 0 0 0 after the second batman-adv is up: root@OpenWrt:/# cat /mnt/ath9k/phy0/rcstat Rate Success Retries XRetries PER 1.0: 0 0 0 0 2.0: 0 0 0 0 5.5: 0 0 0 0 11.0: 0 0 0 0 6.0: 0 0 0 0 9.0: 0 0 0 0 12.0: 0 0 0 0 18.0: 0 0 0 0 24.0: 0 0 0 0 36.0: 0 0 0 0 48.0: 0 0 0 0 54.0: 0 0 0 0 On both boards I have this: root@OpenWrt:/# iwconfig lo no wireless extensions. eth0 no wireless extensions. eth1 no wireless extensions. br-lan no wireless extensions. wlan0 IEEE 802.11abgn ESSID:"xyz" Mode:Ad-Hoc Frequency:2.432 GHz Cell: 92:46:0A:A3:8B:39 Tx-Power=27 dBm Retry long limit:7 RTS thr:off Fragment thr:off Encryption key:off Power Management:off Link Quality:0 Signal level:0 Noise level:0 Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:0 Invalid misc:0 Missed beacon:0 bat0 no wireless extensions. Here is the dmesg dump: root@OpenWrt:/# dmesg 30fe050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=831da04a DA=831da044 BSSID=831da050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8312204a DA=83122044 BSSID=83122050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1804 wlan0: RX ProbeReq SA=8326804a DA=83268044 BSSID=83268050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8319e04a DA=8319e044 BSSID=8319e050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1604 wlan0: RX ProbeReq SA=831ac04a DA=831ac044 BSSID=831ac050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8309604a DA=83096044 BSSID=83096050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=831e204a DA=831e2044 BSSID=831e2050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=831a204a DA=831a2044 BSSID=831a2050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=832de04a DA=832de044 BSSID=832de050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8324604a DA=83246044 BSSID=83246050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1604 wlan0: RX ProbeReq SA=832fc04a DA=832fc044 BSSID=832fc050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8337604a DA=83376044 BSSID=83376050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=82c6804a DA=82c68044 BSSID=82c68050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8329a04a DA=8329a044 BSSID=8329a050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1004 wlan0: RX ProbeReq SA=830e804a DA=830e8044 BSSID=830e8050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=830ec04a DA=830ec044 BSSID=830ec050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1604 wlan0: RX ProbeReq SA=830be04a DA=830be044 BSSID=830be050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8311004a DA=83110044 BSSID=83110050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8312c04a DA=8312c044 BSSID=8312c050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8312e04a DA=8312e044 BSSID=8312e050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8313a04a DA=8313a044 BSSID=8313a050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=830e604a DA=830e6044 BSSID=830e6050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8313604a DA=83136044 BSSID=83136050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1204 wlan0: RX ProbeReq SA=831d004a DA=831d0044 BSSID=831d0050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=831d604a DA=831d6044 BSSID=831d6050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1204 wlan0: RX ProbeReq SA=8329004a DA=83290044 BSSID=83290050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=831d204a DA=831d2044 BSSID=831d2050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1804 wlan0: RX ProbeReq SA=8332004a DA=83320044 BSSID=83320050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1804 wlan0: RX ProbeReq SA=8332c04a DA=8332c044 BSSID=8332c050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1604 wlan0: RX ProbeReq SA=8333e04a DA=8333e044 BSSID=8333e050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1604 wlan0: RX ProbeReq SA=8333c04a DA=8333c044 BSSID=8333c050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1a04 wlan0: RX ProbeReq SA=832e804a DA=832e8044 BSSID=832e8050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1a04 wlan0: RX ProbeReq SA=8333a04a DA=8333a044 BSSID=8333a050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1a04 wlan0: RX ProbeReq SA=8334a04a DA=8334a044 BSSID=8334a050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8335204a DA=83352044 BSSID=83352050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1804 wlan0: RX ProbeReq SA=8331204a DA=83312044 BSSID=83312050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=833b804a DA=833b8044 BSSID=833b8050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1a04 wlan0: RX ProbeReq SA=8303e04a DA=8303e044 BSSID=8303e050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1204 wlan0: RX ProbeReq SA=8308404a DA=83084044 BSSID=83084050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8307204a DA=83072044 BSSID=83072050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8311604a DA=83116044 BSSID=83116050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8311204a DA=83112044 BSSID=83112050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1804 wlan0: RX ProbeReq SA=831ca04a DA=831ca044 BSSID=831ca050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=831c804a DA=831c8044 BSSID=831c8050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1a04 wlan0: RX ProbeReq SA=8319c04a DA=8319c044 BSSID=8319c050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=831ce04a DA=831ce044 BSSID=831ce050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1804 wlan0: RX ProbeReq SA=831e204a DA=831e2044 BSSID=831e2050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=831a204a DA=831a2044 BSSID=831a2050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1204 wlan0: RX ProbeReq SA=832c604a DA=832c6044 BSSID=832c6050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=832cc04a DA=832cc044 BSSID=832cc050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=832d404a DA=832d4044 BSSID=832d4050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8301e04a DA=8301e044 BSSID=8301e050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8338004a DA=83380044 BSSID=83380050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=832b204a DA=832b2044 BSSID=832b2050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1a04 wlan0: RX ProbeReq SA=8303a04a DA=8303a044 BSSID=8303a050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=831e804a DA=831e8044 BSSID=831e8050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1204 wlan0: RX ProbeReq SA=8311c04a DA=8311c044 BSSID=8311c050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8312004a DA=83120044 BSSID=83120050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1004 wlan0: RX ProbeReq SA=8312a04a DA=8312a044 BSSID=8312a050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8317c04a DA=8317c044 BSSID=8317c050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1a04 wlan0: RX ProbeReq SA=8311e04a DA=8311e044 BSSID=8311e050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8321404a DA=83214044 BSSID=83214050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=831c804a DA=831c8044 BSSID=831c8050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1604 wlan0: RX ProbeReq SA=832d404a DA=832d4044 BSSID=832d4050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8301e04a DA=8301e044 BSSID=8301e050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1004 wlan0: RX ProbeReq SA=83aac04a DA=83aac044 BSSID=83aac050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8334204a DA=83342044 BSSID=83342050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1a04 wlan0: RX ProbeReq SA=832f604a DA=832f6044 BSSID=832f6050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=832de04a DA=832de044 BSSID=832de050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=83a0e04a DA=83a0e044 BSSID=83a0e050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8303404a DA=83034044 BSSID=83034050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8325404a DA=83254044 BSSID=83254050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8306c04a DA=8306c044 BSSID=8306c050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8304604a DA=83046044 BSSID=83046050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1004 wlan0: RX ProbeReq SA=8307804a DA=83078044 BSSID=83078050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8335a04a DA=8335a044 BSSID=8335a050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8312c04a DA=8312c044 BSSID=8312c050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8312e04a DA=8312e044 BSSID=8312e050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1804 wlan0: RX ProbeReq SA=8313804a DA=83138044 BSSID=83138050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1a04 wlan0: RX ProbeReq SA=8312204a DA=83122044 BSSID=83122050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=831e404a DA=831e4044 BSSID=831e4050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1804 wlan0: RX ProbeReq SA=8314e04a DA=8314e044 BSSID=8314e050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1204 wlan0: RX ProbeReq SA=831fa04a DA=831fa044 BSSID=831fa050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1804 wlan0: RX ProbeReq SA=8320804a DA=83208044 BSSID=83208050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1204 wlan0: RX ProbeReq SA=8321a04a DA=8321a044 BSSID=8321a050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1204 wlan0: RX ProbeReq SA=8321004a DA=83210044 BSSID=83210050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1204 wlan0: RX ProbeReq SA=8321204a DA=83212044 BSSID=83212050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1204 wlan0: RX ProbeReq SA=8324a04a DA=8324a044 BSSID=8324a050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8325c04a DA=8325c044 BSSID=8325c050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1a04 wlan0: RX ProbeReq SA=8328604a DA=83286044 BSSID=83286050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=832f004a DA=832f0044 BSSID=832f0050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1a04 wlan0: RX ProbeReq SA=8322604a DA=83226044 BSSID=83226050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8326204a DA=83262044 BSSID=83262050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8331e04a DA=8331e044 BSSID=8331e050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=832d204a DA=832d2044 BSSID=832d2050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8335c04a DA=8335c044 BSSID=8335c050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1804 wlan0: RX ProbeReq SA=83aa404a DA=83aa4044 BSSID=83aa4050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=83b2a04a DA=83b2a044 BSSID=83b2a050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1804 wlan0: RX ProbeReq SA=832fa04a DA=832fa044 BSSID=832fa050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8309404a DA=83094044 BSSID=83094050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1804 wlan0: RX ProbeReq SA=830e804a DA=830e8044 BSSID=830e8050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8313c04a DA=8313c044 BSSID=8313c050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8314c04a DA=8314c044 BSSID=8314c050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8315404a DA=83154044 BSSID=83154050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8316004a DA=83160044 BSSID=83160050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8310a04a DA=8310a044 BSSID=8310a050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1004 wlan0: RX ProbeReq SA=830fc04a DA=830fc044 BSSID=830fc050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=831a804a DA=831a8044 BSSID=831a8050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1804 wlan0: RX ProbeReq SA=832c804a DA=832c8044 BSSID=832c8050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=831c404a DA=831c4044 BSSID=831c4050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1004 wlan0: RX ProbeReq SA=8336c04a DA=8336c044 BSSID=8336c050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8336e04a DA=8336e044 BSSID=8336e050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1004 wlan0: RX ProbeReq SA=83ac604a DA=83ac6044 BSSID=83ac6050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=83b6c04a DA=83b6c044 BSSID=83b6c050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1a04 wlan0: RX ProbeReq SA=8337a04a DA=8337a044 BSSID=8337a050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8305c04a DA=8305c044 BSSID=8305c050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1604 wlan0: RX ProbeReq SA=8309e04a DA=8309e044 BSSID=8309e050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=830b004a DA=830b0044 BSSID=830b0050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1204 wlan0: RX ProbeReq SA=831ec04a DA=831ec044 BSSID=831ec050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8310604a DA=83106044 BSSID=83106050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1604 phy0: Adding new IBSS station 8324e04a (dev=wlan0) phy0: Allocated STA 830c8224 phy0: Inserted STA 830c8224 wlan0: RX ProbeReq SA=832aa04a DA=832aa044 BSSID=832aa050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=832ae04a DA=832ae044 BSSID=832ae050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1204 wlan0: RX ProbeReq SA=8323004a DA=83230044 BSSID=83230050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=832e004a DA=832e0044 BSSID=832e0050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8323804a DA=83238044 BSSID=83238050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=832d804a DA=832d8044 BSSID=832d8050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8330e04a DA=8330e044 BSSID=8330e050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8331c04a DA=8331c044 BSSID=8331c050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1004 wlan0: RX ProbeReq SA=8334204a DA=83342044 BSSID=83342050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8397004a DA=83970044 BSSID=83970050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1204 wlan0: RX ProbeReq SA=830ba04a DA=830ba044 BSSID=830ba050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=830bc04a DA=830bc044 BSSID=830bc050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1a04 wlan0: RX ProbeReq SA=830f804a DA=830f8044 BSSID=830f8050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1204 wlan0: RX ProbeReq SA=8309004a DA=83090044 BSSID=83090050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1804 wlan0: RX ProbeReq SA=8310204a DA=83102044 BSSID=83102050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1204 wlan0: RX ProbeReq SA=832ea04a DA=832ea044 BSSID=832ea050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1a04 wlan0: RX ProbeReq SA=8311404a DA=83114044 BSSID=83114050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1a04 wlan0: RX ProbeReq SA=8310804a DA=83108044 BSSID=83108050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1804 wlan0: RX ProbeReq SA=831b804a DA=831b8044 BSSID=831b8050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=831ba04a DA=831ba044 BSSID=831ba050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1204 wlan0: RX ProbeReq SA=8310e04a DA=8310e044 BSSID=8310e050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=830e604a DA=830e6044 BSSID=830e6050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=831d804a DA=831d8044 BSSID=831d8050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=831e404a DA=831e4044 BSSID=831e4050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=831ee04a DA=831ee044 BSSID=831ee050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8310604a DA=83106044 BSSID=83106050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8322804a DA=83228044 BSSID=83228050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8322a04a DA=8322a044 BSSID=8322a050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1204 wlan0: RX ProbeReq SA=8303204a DA=83032044 BSSID=83032050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=832e004a DA=832e0044 BSSID=832e0050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1204 wlan0: RX ProbeReq SA=83b6c04a DA=83b6c044 BSSID=83b6c050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8334204a DA=83342044 BSSID=83342050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1804 wlan0: RX ProbeReq SA=839ae04a DA=839ae044 BSSID=839ae050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=830c004a DA=830c0044 BSSID=830c0050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1a04 wlan0: RX ProbeReq SA=8309204a DA=83092044 BSSID=83092050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=831e404a DA=831e4044 BSSID=831e4050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=831ee04a DA=831ee044 BSSID=831ee050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1204 wlan0: RX ProbeReq SA=832d804a DA=832d8044 BSSID=832d8050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8326804a DA=83268044 BSSID=83268050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1004 wlan0: RX ProbeReq SA=832fe04a DA=832fe044 BSSID=832fe050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8330204a DA=83302044 BSSID=83302050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8324204a DA=83242044 BSSID=83242050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8332a04a DA=8332a044 BSSID=8332a050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=832ca04a DA=832ca044 BSSID=832ca050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=83b9804a DA=83b98044 BSSID=83b98050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1604 wlan0: RX ProbeReq SA=8305804a DA=83058044 BSSID=83058050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8311004a DA=83110044 BSSID=83110050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8303a04a DA=8303a044 BSSID=8303a050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1604 root@OpenWrt:/# CTRL-A Z for help |115200 8N1 | NOR | Minicom 2.3-rc | VT102 | Offline

2 1

[B.A.T.M.A.N.] originators says yes, batping says no
by Jacob Marble 04 Jul '09

04 Jul '09

I have three nodes running OpenWrt r16484 (SVN) and batman-advanced r1298. All nodes show each other in originators. batping gets host unreachable for all relationships, and the host unreachable messages come very quickly, maybe 1000/second. Here is a log sample, log_level 4. log_level 11 doesn't show anything. The setup I'm using worked fine with r1176. Using ahdemo. [ 42949625] Received BATMAN packet via NB: 00:15:6d:a7:6a:9e, IF: ath0 [00:15:6d:a7:6a:9c] (from OG: 00:15:6d:a7:6a:9e, via old OG: 00:15:6d:a7:6a:9e, seqno 214, tq 255, TTL 50, V 7, IDF 0) [ 42949625] updating last_seqno: old 213, new 214 [ 42949625] bidirectional: orig = 00:15:6d:a7:6a:9e neigh = 00:15:6d:a7:6a:9e => own_bcast = 64, real recv = 64, local tq: 255, asym_penality: 255, total tq: 255 [ 42949625] update_originator(): Searching and updating originator entry of received packet [ 42949625] Updating existing last-hop neighbour of originator [ 42949625] Forwarding packet: tq_orig: 255, tq_avg: 255, tq_forw: 250, ttl_orig: 49, ttl_forw: 49 [ 42949625] Forwarding packet: rebroadcast neighbour packet with direct link flag [ 42949625] Sending own packet (originator 00:15:6d:a7:6a:9c, seqno 216, TQ 255, TTL 50, IDF off) on interface ath0 [00:15:6d:a7:6a:9c] [ 42949625] Received BATMAN packet via NB: 00:15:6d:a7:6a:14, IF: ath0 [00:15:6d:a7:6a:9c] (from OG: 00:15:6d:a7:6a:9e, via old OG: 00:15:6d:a7:6a:9e, seqno 214, tq 240, TTL 49, V 7, IDF 1) [ 42949625] bidirectional: orig = 00:15:6d:a7:6a:9e neigh = 00:15:6d:a7:6a:14 => own_bcast = 63, real recv = 64, local tq: 251, asym_penality: 255, total tq: 236 [ 42949625] update_originator(): Searching and updating originator entry of received packet [ 42949625] Updating existing last-hop neighbour of originator [ 42949625] Drop packet: duplicate packet received [ 42949625] Forwarding packet (originator 00:15:6d:a7:6a:9e, seqno 214, TQ 240, TTL 49, IDF on) on interface ath0 [00:15:6d:a7:6a:9c] [ 42949625] Received BATMAN packet via NB: 00:15:6d:a7:6a:9e, IF: ath0 [00:15:6d:a7:6a:9c] (from OG: 00:15:6d:a7:6a:9c, via old OG: 00:15:6d:a7:6a:9c, seqno 216, tq 236, TTL 49, V 7, IDF 1) [ 42949625] Drop packet: originator packet from myself (via neighbour) [ 42949625] Received BATMAN packet via NB: 00:15:6d:a7:6a:14, IF: ath0 [00:15:6d:a7:6a:9c] (from OG: 00:15:6d:a7:6a:9c, via old OG: 00:15:6d:a7:6a:9c, seqno 216, tq 240, TTL 49, V 7, IDF 1) [ 42949625] Drop packet: originator packet from myself (via neighbour) [ 42949625] Received BATMAN packet via NB: 00:15:6d:a7:6a:14, IF: ath0 [00:15:6d:a7:6a:9c] (from OG: 00:15:6d:a7:6a:14, via old OG: 00:15:6d:a7:6a:14, seqno 205, tq 255, TTL 50, V 7, IDF 0) [ 42949625] updating last_seqno: old 204, new 205 [ 42949625] bidirectional: orig = 00:15:6d:a7:6a:14 neigh = 00:15:6d:a7:6a:14 => own_bcast = 64, real recv = 64, local tq: 255, asym_penality: 255, total tq: 255 [ 42949625] update_originator(): Searching and updating originator entry of received packet [ 42949625] Updating existing last-hop neighbour of originator [ 42949625] Forwarding packet: tq_orig: 255, tq_avg: 254, tq_forw: 250, ttl_orig: 49, ttl_forw: 49 [ 42949625] Forwarding packet: rebroadcast neighbour packet with direct link flag [ 42949625] Received BATMAN packet via NB: 00:15:6d:a7:6a:9e, IF: ath0 [00:15:6d:a7:6a:9c] (from OG: 00:15:6d:a7:6a:14, via old OG: 00:15:6d:a7:6a:14, seqno 205, tq 240, TTL 49, V 7, IDF 1) [ 42949625] bidirectional: orig = 00:15:6d:a7:6a:14 neigh = 00:15:6d:a7:6a:9e => own_bcast = 64, real recv = 64, local tq: 255, asym_penality: 255, total tq: 240 [ 42949625] update_originator(): Searching and updating originator entry of received packet [ 42949625] Updating existing last-hop neighbour of originator [ 42949625] Drop packet: duplicate packet received [ 42949625] Forwarding packet (originator 00:15:6d:a7:6a:14, seqno 205, TQ 240, TTL 49, IDF on) on interface ath0 [00:15:6d:a7:6a:9c]

2 3

[B.A.T.M.A.N.] [PATCH] json output from vis server would fail with incomplete writes
by jonathan mzengeza 02 Jul '09

02 Jul '09

Hi Jonathan here I am attending a code sprint here at CSIR in South Africa. We are using B.A.T.M.A.N as a mesh networking software. We ran into a bug which occurred with web browser whereby the data written back through the socket was not complete thereby causing an error with our program. The fix works by making sure that all the data that is to be sent in the send_buffer is sent. It checks the value of ret until it equals the size of the data to be sent. -- Index: vis.c =================================================================== --- vis.c (revision 1336) +++ vis.c (working copy) @@ -580,8 +580,18 @@ } else { send_buffer = current->json_buffer; } + + ret = write( thread_data->socket, send_buffer, strlen( send_buffer )); - ret = write( thread_data->socket, send_buffer, strlen( send_buffer ) ); + while(ret != strlen( send_buffer )) { + send_buffer += ret; + + if ( fsync(thread_data->socket) != 0 ) { + ret = write(thread_data->socket, send_buffer, strlen( send_buffer )); + } + + } + if( ret != strlen( send_buffer ) || (thread_data->format == json) ) { pthread_mutex_lock( &current->mutex );

2 1

[B.A.T.M.A.N.] about: BATMAN algorithm ?
by linuxer 29 Jun '09

29 Jun '09

hello, at http://www.open-mesh.net/wiki/BranchesExplained you say, batman 0.3 is the latest stable implementation, using a new version of the algorithm known as the BATMAN IV/TQ algorithm. Where is the document which describes the BATMAN IV/TQ algorithm in detail?

2 1

[B.A.T.M.A.N.] [PATCH] [batman-adv] Convert to new net_device_ops
by Sven Eckelmann 27 Jun '09

27 Jun '09

The current version of batman-adv-kernelland uses the netdevice structure instead of netdevice ops introduced by v2.6.28-rc5-510-gd314774. The compatibility version was removed in v2.6.30-rc6-851-ge3804cb. We need to change now change to this new structure to be able to compile it against linux-2.6.31. Signed-off-by: Sven Eckelmann <sven.eckelmann(a)gmx.de> --- batman-adv-kernelland/soft-interface.c | 17 +++++++++++++++++ 1 files changed, 17 insertions(+), 0 deletions(-) diff --git a/batman-adv-kernelland/soft-interface.c b/batman-adv-kernelland/soft-interface.c index bb95501..4600017 100644 --- a/batman-adv-kernelland/soft-interface.c +++ b/batman-adv-kernelland/soft-interface.c @@ -31,6 +31,7 @@ #include "hash.h" #include <linux/ethtool.h> #include <linux/etherdevice.h> +#include "compat.h" @@ -98,6 +99,18 @@ int my_skb_push(struct sk_buff *skb, unsigned int len) return 0; } +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 29) +static const struct net_device_ops bat_netdev_ops = { + .ndo_open = interface_open, + .ndo_stop = interface_release, + .ndo_get_stats = interface_stats, + .ndo_set_mac_address = interface_set_mac_addr, + .ndo_change_mtu = interface_change_mtu, + .ndo_start_xmit = interface_tx, + .ndo_validate_addr = eth_validate_addr +}; +#endif /* LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 29) */ + void interface_setup(struct net_device *dev) { struct bat_priv *priv = netdev_priv(dev); @@ -105,12 +118,16 @@ void interface_setup(struct net_device *dev) ether_setup(dev); +#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 29) dev->open = interface_open; dev->stop = interface_release; dev->get_stats = interface_stats; dev->set_mac_address = interface_set_mac_addr; dev->change_mtu = interface_change_mtu; dev->hard_start_xmit = interface_tx; +#else + dev->netdev_ops = &bat_netdev_ops; +#endif /* LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 29) */ dev->destructor = free_netdev; dev->features |= NETIF_F_NO_CSUM; -- 1.6.3.1

2 2

Re: [B.A.T.M.A.N.] originator tq_avg oscilations
by Andrew Lunn 25 Jun '09

25 Jun '09

> If you are willing to test a few things to reduce the effect we can > start right away. You could set TQ_GLOBAL_WINDOW_SIZE to 1 in order > to deactivate the averaging of the TQ values. Aslo, some people > reported that reducing the hop penalty also will increase the speed. I already tried changing TQ_GLOBAL_WINDOW_SIZE to 5 instead of 10 and that helped. Changing it to one is interesting. I've not tried it yet, but i would of thought some ring buffer was needed to handle the 0s which are added when originator messages are received for other neighbors. I already tried reducing the hop penalty. However testing showed it behaved worse. This i don't understand. So i'm guessing my test setup changed between my different tests. So i need to run the test again, both the control and the modified hop penalty. What ideas do you have for improving the algorithms. Depending on the scale of work needed i might have some time to do some coding. Andrew

3 3

[B.A.T.M.A.N.] Recommended Reading for those that want to get involved with B.A.T.M.A.N.
by Andrew de Andrade 24 Jun '09

24 Jun '09

Dear all, I've been signed up to the list for a few weeks now and I was wondering if you guys could recommend a reading list for those who would like to get involved with B.A.T.M.A.N. I'm currently halfway through "Computer Networking: A Top Down Approach" by James F. Kurose and Keith W. Ross, however it is only provides a general theoretical overview of networking as it exists today. Mesh networking is something far more advanced, so I was wondering if there were particular textbooks, journal articles and other material that members of this list could recommend. Recommend anything and everything that you guys think is relevant, both directly and indirectly. thx! Andrew

1 0

[B.A.T.M.A.N.] ring buffer average function...
by Andrew Lunn 23 Jun '09

23 Jun '09

Hi Folks Can somebody explain why this function works the way it does: uint8_t ring_buffer_avg(uint8_t lq_recv[]) { uint8_t *ptr; uint16_t count = 0, i = 0, sum = 0; ptr = lq_recv; while (i < TQ_GLOBAL_WINDOW_SIZE) { if (*ptr != 0) { count++; sum += *ptr; } i++; ptr++; } if (count == 0) return 0; return (uint8_t)(sum / count); } It only averages over the none zero values. The code filling these ring buffer puts a zero in whenever an originator message is received from another neighbor. When the originator message is from this neighbor, the tq in the originator message is put in. When a neighbor is dead, the ring slowly fills with 0's, whenever there is an originator message from one of the other neighbors. However since the 0 are ignored when calculating the average, we tend to have a cliff effect for dead neighbors. There tq_avg stays about the same for quite a while, and then plummets to 0. For faster detecting dead neighbors, it would be better if the 0 were included in the average. The tv_avg would then drop more linearly, not cliff like, so it is likely to cross below another neighbors tv_avg earlier, so re-routing around the dead node faster. Before i change this function, i just want to understand why it is like this, and what i'm likely to break :-( Thanks Andrew

2 1

[B.A.T.M.A.N.] originator tq_avg oscilations
by Andrew Lunn 23 Jun '09

23 Jun '09

Hi Folks I've been playing with B.A.T.M.A.N advanced for a few weeks now. One of the scenarios where we might want to use it is nomadic vehicles. Each vehicle has a wifi radio which is used to build a mesh between the vehicles when the vehicles are parked together at a location. I said the vehicles are nomadic. By that i mean they tend to stay in one place for a while, and then move on. They can move individually, or in groups. For the moment we are not interested in meshing while on the move. I've run into a "problem" when one vehicle/node moves away from the rest of the vehicles/nodes. It is taking a long time for the mesh to realize the node has gone and rebuild the mesh. With a 500ms orig_interval in our little test network, pings get lost for an average of 26 seconds. The variation is great, sometimes it reroutes in 10 seconds, sometimes in 50 seconds. So i want to improve this. The first thing i did was make some plots of the tq_avg value, as shown in /proc/net/batman-adv/originators. I look at one particular originator and plot the different tq_avg values for the list of neighbors. Attaches is a png image showing this. I was surprised to see that its unstable and oscillating. The different tq_avg values mostly oscillate together, as shown in the figure, but i've also seen cases when they oscillate 180 degrees out of phase. In that case, the routing flips on the cross overs. Is this normal? Is it expected behavior? Has anybody worked on making re-routing around disappears nodes faster? Thanks Andrew

2 1

[B.A.T.M.A.N.] Oscilations....
by Andrew Lunn 23 Jun '09

23 Jun '09

Ups, forgot the attachment with the plot :-( Andrew

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