B.A.T.M.A.N December 2008

b.a.t.m.a.n@lists.open-mesh.org

17 participants
16 discussions

[B.A.T.M.A.N.] [PATCH] batman-adv-kernelland: Fix memory corruption bug
by Scott Raynel 12 Dec '08

12 Dec '08

Hi there, I've been spending some time tracking down a bug that's been causing memory corruption followed by random kernel panics. Thanks to the kernel's slab memory debugger I tracked it down to a kfree in send.c that was freeing a block of memory that had been written to past the end of its allocation. Turned out to be a simple typo, which I've fixed in the following patch. When resizing the packet_buff struct in batman_if, the new length was being updated but the old length was being used for the kmalloc(), causing something later to think it had more memory allocated to write to, hence writing past the end of the allocation. Signed-off-by: Scott Raynel <scottraynel(a)gmail.com> Index: send.c =================================================================== --- send.c (revision 1105) +++ send.c (working copy) @@ -159,7 +159,7 @@ if ((hna_local_changed) && (batman_if->if_num == 0)) { new_len = sizeof(struct batman_packet) + (num_hna * ETH_ALEN); - new_buf = kmalloc(batman_if->pack_buff_len, GFP_ATOMIC); + new_buf = kmalloc(new_len, GFP_ATOMIC); /* keep old buffer if kmalloc should fail */ if (new_buf) { Cheers, -- Scott Raynel WAND Network Research Group Department of Computer Science University of Waikato New Zealand

3 5

[B.A.T.M.A.N.] Want to count the number of nodes connecting to a batman gateway
by david johnson 11 Dec '08

11 Dec '08

Hi I'm busy trying to adapt batman-exp to do some fair bandwidth allocation and to do this I need each tunnel from a client to be shown as a seperate vpn. Or I need a way to count the number of nodes connecting to the gateway Do you know how I could do this? David

3 2

[B.A.T.M.A.N.] New release of the firmware Nightwing, wich uses BMX
by Julio Cesar Puigpinos 08 Dec '08

08 Dec '08

The development group [0] of LUGRo-Mesh [1] announces that already it's avalaible the second release of the firmware Nightwing [2], version 0.6-beta1 [3]. Nightwing allows the creation of Wireless Mesh Networks [4], with a fast and easy deployment. Requires an Atheros wireless chip, and a minimum of 4MB of flash memory and 16MB of RAM memory. It can be instaled in devices from Ubiquiti like the NanoStation, from Accton like the Fonera 2200, and many more devices that cover the minimun requirements. Some of the new characteristics introduced are: * Use of the protocol B.A.T.M.A.N.-Experimental (BMX) [5] * The Public connection Interface es now managed by the captive portal WiFiDog [6]. * Each Access Point has an unic SSID for every node. * A WiFiDog server [7] is avalaible for the LUGRo-Mesh Network. Thanks to Maximiliano Müller of SitiosHispanos.com for supplying a VPS for the server. The group has mailing list for the Nightwing firmware [8] and for the group it self [9]. Also, it's avalaible the repository of the LUGRo-Mesh Development Group [10]. [0] lugro-mesh-dev_AT_lugro.org.ar [1] http://www.lugro-mesh.org.ar/en/ [2] http://nightwing.lugro-mesh.org.ar/en/ [3] http://nightwing.lugro-mesh.org.ar/en/download.html [4] http://en.wikipedia.org/wiki/Wireless_mesh_network [5] https://dev.open-mesh.net/batman/wiki [6] http://dev.wifidog.org/wiki [7] http://wifidog.lugro-mesh.org.ar/ [8] http://www.lugro.org.ar/mailman/listinfo/nightwing [9] http://www.lugro.org.ar/mailman/listinfo/lugro-mesh [10] http://trac.assembla.com/lugro-mesh-dev/wiki Saludos, Julio -- www.lugro-mesh.org.ar/ Wireless Mesh Networks Group www.lugro.org.ar GNU/Linux User Group Rosario, Argentina Slackware rulez :P www.slackware.org NO A LA MATRICULA!!!: http://noalamatricula.wordpress.com/

1 0

[B.A.T.M.A.N.] Looking for batman-adv 0.1-alpha
by Tobias Gieseke 08 Dec '08

08 Dec '08

Hi, I'm looking for Batman-advanced 0.1-alpha (compability version 1). We've got some meshnodes III from a company called Saxnet and they seem to work with this old version.. I can't find it in the repositories so perhaps someone can tell me where to find it, or send it to me directly. I need it for i386 architecture. Is there a chance to get batman-adv running on open-wrt? kind regards, Tobi

4 5

[B.A.T.M.A.N.] 0.3.1 rv1152 - some test results
by Chris W. 05 Dec '08

05 Dec '08

Hello, thought I'd just let you know what I experienced when testing rv1152 on an outdoor network with atheroses and broadcoms, olsr in parallel. Interfaces are started with ifconfig eth1:1 10.4.2.29 netmask 255.255.0.0 broadcast 10.4.255.255 The batman test area looks something like this: http://preveli.gr/mesh/bat-228-2b.gif -1- gateway: a gw is started with batmand -s 10.4.2.50 -g 2mbit/256kbit eth1:1 the client 2.29 with batmand -s 10.4.2.50 -a 10.2.29.0/24 -r 2 ath0:1 When pinging the gateway through the client node or when accessing the internet through the node it logs Nov 26 22:52:04 (none) kern.err batmand[1287]: Error - got packet from unknown client: 10.4.2.29 (virtual ip 10.2.29.136) The tunnel itself is flickering, this happens with -r1,2,3 and -p client log: Gateway client - gateway (10.4.2.2) says: IP (169.254.0.1) is expired Deleting default route via gate0 (table 68) Adding default route to 10.4.2.2 (gw_flags: 40, tq: 178, gw_product: 0) Error - couldn't create tunnel: old tunnel is still active Adding default route to 10.4.2.2 (gw_flags: 40, tq: 179, gw_product: 0) Gateway client - got IP (169.254.0.1) from gateway: 10.4.2.2 Adding default route via gate0 (table 68) Gateway client - gateway (10.4.2.2) says: IP (169.254.0.1) is expired Deleting default route via gate0 (table 68) Adding default route to 10.4.2.2 (gw_flags: 40, tq: 181, gw_product: 0) Gateway client - got IP (169.254.0.1) from gateway: 10.4.2.2 Adding default route via gate0 (table 68) gateway log: Gateway - assigned 169.254.0.1 to client: 10.4.2.29 Gateway - assigned 169.254.0.1 to client: 10.4.2.29 Gateway - assigned 169.254.0.1 to client: 10.4.2.29 -?- What is batgat for, does it disannounce a gateway which in fact is down e.g due to dsl-failure ? -2- together with olsrd. All olsr nodes are on the subnet 192.168.x.x, all batman interfaces are aliases except on fonera 2.29 which is batman only. From a gateway node running olsrd in parallel the route to an announced network drops out towards the internet, the node itself is reachable: root@10.4.2.2:~# traceroute -n 10.4.2.29 traceroute to 10.4.2.29 (10.4.2.29), 30 hops max, 40 byte packets 1 10.4.2.95 13.918 ms 8.674 ms 4.966 ms 2 10.4.2.72 20.074 ms 6.971 ms 32.104 ms 3 10.4.2.29 41.365 ms 12.472 ms 33.477 ms root@10.4.2.2:~# traceroute -n 10.2.29.1 traceroute to 10.2.29.1 (10.2.29.1), 30 hops max, 40 byte packets 1 * * * 2 62.103.x.x 46.254 ms 35.242 ms * (internet) From another node (8.107) the host is pingable, but traceroute drops out to the olsr-network PING 10.4.2.29 (10.4.2.29): 56 data bytes 64 bytes from 10.4.2.29: seq=0 ttl=59 time=19.229 ms 64 bytes from 10.4.2.29: seq=1 ttl=59 time=14.573 ms traceroute to 10.4.2.29 (10.4.2.29), 30 hops max, 38 byte packets 1 192.168.8.105 11.337 ms 2.999 ms 3.366 ms 2 192.168.8.106 9.791 ms 5.150 ms 5.598 ms 3 192.168.106.2 10.965 ms 5.981 ms 7.978 ms 4 192.168.2.95 36.130 ms 6.777 ms 8.472 ms 5 192.168.2.72 18.389 ms 20.188 ms 10.949 ms 6 * * * 7 * * traceroute to 10.2.29.1 (10.2.29.1), 30 hops max, 38 byte packets 1 192.168.8.102 6.833 ms 5.335 ms 2.720 ms 2 192.168.8.106 17.269 ms 5.819 ms 8.960 ms 3 192.168.106.2 16.785 ms 6.966 ms 5.525 ms 4 * (internet) As I tested this amoung three nanostations (8.105,106,107) all went fine including traceroute to an announced subnet. Of these three only 8.106 has errors of the following kind - may this strange behaviour be an endian issue ? 8.106 atheros is lan-connected to 2.2 wrt54g broadcom: -3- previously announced networks are not deleted (8.106), the routing table collects multiple entries for the same destination Nov 26 23:18:42 Nano5-106 daemon.err batmand[574]: Error - can't add throw route to 10.2.29.0/24 via 10.8.106.100 (table 65): File exists Nov 26 23:18:42 Nano5-106 daemon.err batmand[574]: Error - can't add route to 10.2.29.0/24 via 10.8.106.100 (table 65): File exists Nov 26 23:18:47 Nano5-106 daemon.err batmand[574]: Error - can't add throw route to 10.8.106.100/32 via 10.8.106.100 (table 65): File exists Nov 26 23:18:47 Nano5-106 daemon.err batmand[574]: Error - can't add route to 10.8.106.100/32 via 10.8.106.100 (table 65): File exists root@Nano5-106:~# ip route show table 65 throw 10.5.30.100 proto static 10.5.30.100 via 10.4.8.105 dev ath0 proto static src 10.4.8.106 10.5.30.100 via 10.4.8.109 dev ath0 proto static src 10.4.8.106 10.5.30.100 via 10.4.8.102 dev ath0 proto static src 10.4.8.106 throw 10.2.50.0/24 proto static 10.2.50.0/24 via 10.8.106.100 dev eth0 proto static src 10.8.106.1 throw 10.2.29.0/24 proto static 10.2.29.0/24 via 10.4.8.102 dev ath0 proto static src 10.4.8.106 10.2.29.0/24 via 10.8.106.100 dev eth0 proto static src 10.8.106.1 10.2.29.0/24 via 10.4.8.105 dev ath0 proto static src 10.4.8.106 root@Nano5-106:~# ip rule 0: from all lookup local 6600: from all to 10.4.0.0/16 lookup 66 6601: from all to 10.8.106.0/24 lookup 66 6699: from all lookup 65 6700: from all to 10.4.0.0/16 lookup 67 6701: from all to 10.8.106.0/24 lookup 67 32766: from all lookup main 32767: from all lookup default This happens on 2.29 as well but not on every node, 8.107,105,104 and maybe others stay clear. It occurs on 8.109 which is lan-connected to broadcom 5.30 (see the map). Well, I'll keep on testing ;-) Chris

3 12

[B.A.T.M.A.N.] Intel CC warning smashing
by Sven Eckelmann 01 Dec '08

01 Dec '08

Hi, I had a small discussion with Simon Wunderlich about r1166 and showed him a output intels c compiler to proof that the current code compiles "fine" with it. The output shows a big amount of warnings which were more or less useful. I promised him to send some patches to the mailinglist so more people can have a look at them and check if they are somewhat helpful. Best regards, Sven Eckelmann

2 14

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

B.A.T.M.A.N December 2008