October 2014 - B.A.T.M.A.N - lists.open-mesh.org

[B.A.T.M.A.N.] [PATCH maint] batman-adv: fix counter for multicast supporting nodes

by Linus Lüssing

A miscounting of nodes having multicast optimizations enabled can lead to multicast packet loss in the following scenario: If the first OGM a node receives from another one has no multicast optimizations support (no multicast tvlv) then we are missing to increase the counter. This potentially leads to the wrong assumption that we could safely use multicast optimizations. Fixings this by increasing the counter if the initial OGM has the multicast TVLV unset, too. Introduced by 77ec494490d60d89b42cd01d5dbf8dee04503623 ("batman-adv: Announce new capability via multicast TVLV") Signed-off-by: Linus Lüssing <linus.luessing(a)web.de> --- multicast.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/multicast.c b/multicast.c index 96b66fd..02c2e0c 100644 --- a/multicast.c +++ b/multicast.c @@ -686,11 +686,13 @@ static void batadv_mcast_tvlv_ogm_handler_v1(struct batadv_priv *bat_priv, if (orig_initialized) atomic_dec(&bat_priv->mcast.num_disabled); orig->capabilities |= BATADV_ORIG_CAPA_HAS_MCAST; - /* If mcast support is being switched off increase the disabled - * mcast node counter. + /* If mcast support is being switched off or if this is an initial + * OGM without mcast support then increase the disabled mcast + * node counter. */ } else if (!orig_mcast_enabled && - orig->capabilities & BATADV_ORIG_CAPA_HAS_MCAST) { + (orig->capabilities & BATADV_ORIG_CAPA_HAS_MCAST || + !orig_initialized)) { atomic_inc(&bat_priv->mcast.num_disabled); orig->capabilities &= ~BATADV_ORIG_CAPA_HAS_MCAST; } -- 1.7.10.4

7 years, 8 months

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Re: [B.A.T.M.A.N.] help for batman-adv with monitor WiFi card

by Dirk van der Walt

Hi Jammy, I can also confirm what Antonio replied. When I was building firmware for MESHdesk using the then trunk (Barrier Breaker) I nearly gave up on the Dragino hardware (AR9331) because the adhoc connections between nodes refused to connect beyond 1Mbps unless you restart the WiFi a one or more times. Other Atheros based hardware like the OM2P's did not have the same issue though. On advise from Steve Song (Village Telco) I tried Attitude Adjustment and all that problems disappeared and there is now proper speed between the adhoc connections. I haven't tried again on Barrier Breaker, but will probably in the near future do another attempt and see if the problem still exists now that it has been released. Cheers

7 years, 8 months

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[B.A.T.M.A.N.] batman-adv bonding feature - unable to get data packets fragmented into multiple wireless interfaces

by syed moulana

hi I tested the throughput between point to point mesh nodes using single and 2 radios. 1. Using single radio (ch 5180) the resulting throughput for HT40+ TCP max 250mbit/s UDP - max 320mbit/s 2. Using 2 radios with and without batctl bonding enabled (ch 5180 for wlan0, ch 5785 for wlan1), the resulting throughput for HT40+ is same. with batctl bonding and fragmentation enabled I believed I should be getting 50% gain in througput. When I monitor the wlan0 and wlan1 interfaces using batctl tcpdump -p 4 wlanx I can see that iperf data are interleaved. There is no splitting of data frames into 2 wireless interfaces. Please advice Tq Syed

7 years, 8 months

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[B.A.T.M.A.N.] new alfred packet type *3* for solar tracer charging units

by Ufo

at Solarfestival in Germany we were reverse engineering some solar tracer charge controllers. so they were part of the local wifi mesh https://twitter.com/rundfreifunk/status/502788487549288448 https://twitter.com/rundfreifunk/status/503888938973802496 https://twitter.com/rundfreifunk/status/503942726292103168 best way for distributing the detailed data (about local sun impact..) was alfred. we used nr. 160 but now simon choosed nr. 3 for that. https://twitter.com/rundfreifunk/status/503548243452899328 so, plug your solar systems into your mesh-nodes! https://twitter.com/rundfreifunk/status/503875891735560192 https://twitter.com/rundfreifunk/status/504575102965792768 greetings, ufo p.s. code: https://gitorious.org/tracertools/pages/Home p.p.s. anyone with CRC expierence?? please! we need help with that dump CRC, please have a look if there is a new idea about used crc http://pad.freifunk.net/p/solartracer -- --- Freifunk Leipzig http://leipzig.freifunk.net

7 years, 8 months

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[B.A.T.M.A.N.] Inquiry on interface alternating

by MingAnn Ng

Hello, I am currently running some powerpc machines with buildroot environment. The Linux kernel version I am using is 3.8.13 and BATMAN-adv within the kernel without any modification. I am running interface alternating test with the topology below: A========B=========C There are two wireless links between A and B and two wireless links between B and C. The two wireless link is using two different channel and ESSID. TQ of the 4 links are vary from 250-255 at the initial state. I run udp iperf from A to C and observe tcpdump on node B for the two wireless interfaces (wlan0 and wlan1). I observed that interface alternation is not happening always. Sometime the route will be using wlan0 or wlan1 all the way from A to C, as we observed at node B, only 1 interface has traffic on tcpdump. Sometime when interface alternation happened, tcpdump for wlan0 and wlan1 will show traffic. I changed the topology to the below to test further: A---------------B=========C There is only 1 wireless link from A to B while there are two link from B to C. In this case, I observed that interface alternation will always happened, as I observed both wlan0 and wlan1 has traffic on tcpdump. Could you please explain to me what has caused interface alternation not happening in the 1st topology and why the interface alternation will always happen in the second topology. Thank you in advance, Ming Ann

7 years, 8 months

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[B.A.T.M.A.N.] help for batman-adv with monitor WiFi card

by jammy

Hi all， Now i have build a mesh network with batman-adv routing algorithm（batman-adv-2014.2.0）and Linux 3.3.8. Each mesh node have one WiFi card which is configued to the adhoc mode （according to the suggestion of openmesh website）and 11A protocol. But the data rate between two mesh nodes is only 8Mbps，while if I configure the same WiFi card in mesh node to AP mode and client mode，the datarate between them can achive 40Mbps. I think the reason of the low data rate is caused by the adhoc mode（my wireless driver is ath9k，the datarate of adhoc mode is slower indeed） My questions are： 1. How can I raise the data rate to 30M+ if I use the adhoc mode？ 2. can I use the monitor mode of WiFi card with batman-adv？someone tells that it can be done，but when I batctl addif wlan0 （wlan0 is configured in monitor），it shows that interface type not support by batman-adv. I am waiting for your replies and thank you very much. from jammy's iPhone

7 years, 8 months

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[B.A.T.M.A.N.] alfred packet types for node statistics?

by Ufo

i read about plans about using alfred for distributing detailed node statistics on the next "freifunk gluon" firmware release. that firmware is used by dozens of german communities and is batman-adv only.. we want to try to include that in our own firmware (we are still using "freifunk meshkit" with both olsr + batman-adv) is anyone involved and could send me more details? i only found http://gluon.readthedocs.org/en/v2014.3/features/announce.html#accessing-... why datatype 158 and 159 is used? i think, that should be one of the registered numbers? -- --- Freifunk Leipzig http://leipzig.freifunk.net

7 years, 8 months

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[B.A.T.M.A.N.] how to compile the latest versions of batman-adv in OpenWrt

by Ufo

i still have problems building batman-adv on openwrt BB release and with CC. its still 2014.02, also the official BB release is with this version. http://downloads.openwrt.org/barrier_breaker/14.07/ar71xx/generic/package... i saw that 2014.3 seems to be released in july? http://git.open-mesh.org/batman-adv.git/tag/refs/tags/v2014.3.0 are there worries about that version within openwrt, so we still shell use version 2014.2? or, should we better change to a nowadays trunk version of batman-adv, to avoid 2014-3 problems? see also: https://github.com/openwrt-routing/packages/tree/for-14.07 https://github.com/openwrt-routing/packages/ p.s. some weeks ago there was a thread about multicasting. and now, it seems that developers from "freifunk-gluon" communities have problems with that. maybe someone of you can help these guys please? https://github.com/freifunk-gluon/gluon/issues/198 -- --- Freifunk Leipzig http://leipzig.freifunk.net

7 years, 8 months

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[B.A.T.M.A.N.] mikrotik routers + openwrt + batman-adv *or* alix apu1c

by dan

mikrotik) Is anyone running/testing any mikrotik gear such as the rb911 or rb912, rb922, rb433, etc w/ openwrt and batman-adv? I'm considering a multi-radio mesh node and I think this platform might be priced well enough. I do fixed wireless broadband but am looking at reaching into some heavily wooded areas that nothing else can penetrate. The rb922 in particular has an 5Ghz 'ac radio and mini-pcie that can take a second 5Ghz 'ac radio. That makes for a really great dual 802.11'ac radio w/ gigabit port and PoE ethernet to run a cable into the customer's house. An RB433 can take 2 'ac radios and a 900Mhz radio which you could artificially increase the cost on for a lower throughput tree-penetrating backup link to be placed every x number of hops. The rb922 version would be a sub $200 high performance mesh node. alix) now, the alix apu1c is a 2 mini-pcie box with dual 1Ghz x86 CPUs ready to run debian and has 3 gigabit ethernet ports. This would be a nice 'edge' node with 1 or 2 of those gigabit ports dedicated to backhaul radios. *** So, the concept is that clients wouldn't actually be on wireless and batman-adv would just be handling distribution. Clients would be wired up ethernet to a PoE injector. This dual radio mesh should only add latency at each hop as a result, though the obvious link quality and capacity are taken into account. I can bring in 20-200Mbps of service but can't penetrate the trees for more than a few houses on the edge. I could do two links to reachable homes and have any number (throughput limited) of clients connect w/ the redundant path. Thoughts?

7 years, 8 months

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[B.A.T.M.A.N.] QoS in BATMAN-adv

by Krishnathiepan Rasanayagam

Hi All, We are currently doing research on QoS services provided in MANETs using batman-adv protocol. We want to know are there any similar projects had been done before this in this area. And does any one have knows is there an alternative in batman-adv for nbar of Cisco. -- Best regards, Krishna.

7 years, 8 months

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B.A.T.M.A.N October 2014