[B.A.T.M.A.N.] gateway<->client DHCP problem - B.A.T.M.A.N - lists.open-mesh.org

25 Jul 2012


      Hi all, i have strange problem with gatewat<>client setup as described here:
http://www.open-mesh.org/projects/batman-adv/wiki/Gateways
setup is simple
[dhcp server on bat0]<wired connection>[mesh node]<wireless connection>[client]
server configuration:
root@droch:~# ifconfig 
bat0      Link encap:Ethernet  HWaddr a2:a1:ff:98:cd:37
           inet addr:192.168.2.1  Bcast:192.168.2.255  Mask:255.255.255.0
           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
           RX packets:5541 errors:0 dropped:0 overruns:0 frame:0
           TX packets:3636 errors:0 dropped:20 overruns:0 carrier:0
           collisions:0 txqueuelen:0
           RX bytes:506784 (494.9 KiB)  TX bytes:364485 (355.9 KiB)
eth0      Link encap:Ethernet  HWaddr 00:1d:09:36:96:84
           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
           RX packets:20020 errors:0 dropped:0 overruns:0 frame:0
           TX packets:12193 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:1000
           RX bytes:1519028 (1.4 MiB)  TX bytes:820498 (801.2 KiB)
           Interrupt:16
root@droch:~# route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
192.168.2.0     0.0.0.0         255.255.255.0   U     0      0        0 bat0
root@droch:~# batctl if
eth0: active
root@droch:~# batctl gw
server (announced bw: 1024MBit/1024MBit)
dhcp daemon (isc-dhcp-server 4.2.2) running on bat0
mesh node configuration:
ifconfig 
bat0      Link encap:Ethernet  HWaddr 12:cb:4a:61:c5:0c
           inet addr:192.168.2.3  Bcast:192.168.2.255  Mask:255.255.255.0
           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
           RX packets:154 errors:0 dropped:0 overruns:0 frame:0
           TX packets:101 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:0
           RX bytes:14327 (13.9 KiB)  TX bytes:14836 (14.4 KiB)
eth0      Link encap:Ethernet  HWaddr 00:0d:b9:24:e3:44
           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
           RX packets:3626 errors:0 dropped:0 overruns:0 frame:0
           TX packets:1898 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:1000
           RX bytes:232959 (227.4 KiB)  TX bytes:84767 (82.7 KiB)
           Interrupt:10 Base address:0x8000
wlan0     Link encap:Ethernet  HWaddr 00:02:6f:b8:95:5e
           UP BROADCAST RUNNING MULTICAST  MTU:1528  Metric:1
           RX packets:3539 errors:0 dropped:0 overruns:0 frame:0
           TX packets:2134 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:32
           RX bytes:161096 (157.3 KiB)  TX bytes:173733 (169.6 KiB)
root@proto-3:~# route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
0.0.0.0         192.168.2.1     0.0.0.0         UG    0      0        0 bat0
192.168.2.0     0.0.0.0         255.255.255.0   U     0      0        0 bat0
root@proto-3:~# batctl if
eth0: active
wlan0: active
root@proto-3:~# batctl gwl
       Gateway      (#/255)           Nexthop [outgoingIF]: gw_class ... [B.A.T.M.A.N. adv 2012.2.0, MainIF/MAC: eth0/00:0d:b9:24:e3:44 (bat0)]
          00:1d:09:36:96:84 (255) 00:1d:09:36:96:84 [      eth0]: 119 - 1024MBit/1024MBit
client configuration:
ifconfig 
bat0      Link encap:Ethernet  HWaddr d6:50:dd:4d:54:75
           inet addr:192.168.2.135  Bcast:192.168.2.255  Mask:255.255.255.0
           inet6 addr: fe80::d450:ddff:fe4d:5475/64 Scope:Link
           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
           RX packets:1664 errors:0 dropped:0 overruns:0 frame:0
           TX packets:1728 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:0
           RX bytes:174732 (170.6 KiB)  TX bytes:170468 (166.4 KiB)
mp1       Link encap:Ethernet  HWaddr 00:21:a4:35:36:26
           UP BROADCAST RUNNING MULTICAST  MTU:1528  Metric:1
           RX packets:8248 errors:0 dropped:0 overruns:0 frame:0
           TX packets:5910 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:32
           RX bytes:477461 (466.2 KiB)  TX bytes:560034 (546.9 KiB)
batctl if
mp1: active
batctl gwl
       Gateway      (#/255)           Nexthop [outgoingIF]: gw_class ... [B.A.T.M.A.N. adv 2012.2.0, MainIF/MAC: mp1/00:21:a4:35:36:26 (bat0)]
       => 00:1d:09:36:96:84 (225) 00:02:6f:b8:95:5e [       mp1]: 119 - 1024MBit/1024MBit
batctl gw
client (selection class: 20)
dhcp client is dhcpcd version 3.2.3.
In first step all work fine, bring up bat0 on client, bring up dhcp on it, it get ip address and work
fine. but if i just bring bat0 on client down then up it don't work, it see gateway, i see dhcp 
request and replies on server on bat0, but on mesh node and client i don't see any reply in batctl tr 
nor tcpdump and it stay in this state forever.
But, if i bring bat0 on client down, wait 200 seconds until client is removed from originators
on server by timeout and bring bat0 on client back up it starts working again and get ip from dhcp server.
On all batman nodes i use batman-adv version 2012.2.0.
C уважением                       With Best Regards
Георгиевский Юрий.                Georgiewskiy Yuriy
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