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Feature #353

Updated by Sven Eckelmann almost 2 years ago

To me it looks like it is possible to translate macs via dc because batctl is able to view dc. also I guess, that dc content is correct, because elsewhise batman should be broken. So I can't follow why not using it as first source of mac/ip translation and just do the other stuff is this hit doesn't match.

I'm user, not developer. From my perspective it's all about functionality. -i use batctl tr and batctl as an debugging tool. I think this may be the only usecase for this commands. If there is an IP 192.168.4.3 in my network and I would like to find out why und where it is, I would traceroute it. I can't do it with layer 3 tools so I need batctl. It is possible to do it manually. showing and grepping dc and using the mac for tr. from user perspektive it would make much more sense that this would happen also automatically if I translate or traceroute or ping the ip. I can resolve IPs I can't reach via layer2 ping and I can't resolv IPs I can reach via batman. Just from user perspektive and ponyhof I would wish that the debugging functionalities would be able to translate every IP in batman network and don't have a need to translate IPs that are not in batman network (non batman devices maybe could be filtered out?). But seems less a bug issue than a feature request.

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Original message

If I make batctl tr on a gateway to its own ip the tr goes to wrong mac. also batctl is unable to find mac to other ips.
batman 2018.0

<pre>
root@node82:~# ip a s bat0
5: bat0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN group default qlen 1000
link/ether 02:00:00:02:08:01 brd ff:ff:ff:ff:ff:ff
inet 10.110.64.1/21 brd 10.110.71.255 scope global bat0
valid_lft forever preferred_lft forever
inet6 2a03:2260:300b:208::1/64 scope global
valid_lft forever preferred_lft forever
inet6 fe80::d4a2:a7ff:fe6d:26c5/64 scope link
valid_lft forever preferred_lft forever
root@node82:~# batctl tr 10.110.64.1
traceroute to 10.110.64.1 (72:8e:0a:4d:07:03), 50 hops max, 20 byte packets
1: 02:00:00:02:05:00 0.267 ms 0.144 ms 0.168 ms
2: 4e:70:0a:55:1a:fb 29.208 ms 27.537 ms 28.530 ms
3: 1e:03:61:52:62:93 27.344 ms 26.860 ms 30.777 ms
4: 72:8e:0a:4d:07:03 79.296 ms 75.739 ms 109.504 ms
root@node82:~#

root@node72:~# batctl tr 10.110.56.1
traceroute to 10.110.56.1 (72:8e:0a:4d:07:03), 50 hops max, 20 byte packets
1: 02:00:00:02:05:00 0.256 ms 0.165 ms 0.219 ms
2: 4e:70:0a:55:1a:fb 25.500 ms 25.870 ms 37.836 ms
3: 1e:03:61:52:62:93 29.220 ms 27.655 ms 25.810 ms
4: 72:8e:0a:4d:07:03 77.655 ms 145.679 ms 90.243 ms
root@node72:~# ip a s bat0
5: bat0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN group default qlen 1000
link/ether 02:00:00:02:07:01 brd ff:ff:ff:ff:ff:ff
inet 10.110.56.1/21 brd 10.110.63.255 scope global bat0
valid_lft forever preferred_lft forever
inet6 2a03:2260:300b:207::1/64 scope global
valid_lft forever preferred_lft forever
inet6 fe80::307c:cbff:fe21:b4e2/64 scope link
valid_lft forever preferred_lft forever
root@node72:~#

root@node52:~# ip a s bat0
5: bat0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN group default qlen 1000
link/ether 02:00:00:02:05:01 brd ff:ff:ff:ff:ff:ff
inet 10.110.40.1/21 brd 10.110.47.255 scope global bat0
valid_lft forever preferred_lft forever
inet6 2a03:2260:300b:205::1/64 scope global
valid_lft forever preferred_lft forever
inet6 fe80::7c6f:2bff:fe98:a3a9/64 scope link
valid_lft forever preferred_lft forever
root@node52:~# batctl tr 10.110.40.1
traceroute to 10.110.40.1 (aa:a5:39:b1:e3:63), 50 hops max, 20 byte packets
1: 02:00:00:02:06:00 0.243 ms 0.081 ms 0.117 ms
2: aa:a5:39:b1:e3:63 14.457 ms 14.159 ms 11.271 ms

root@node42:~# ip a s bat0
5: bat0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN group default qlen 1000
link/ether 02:00:00:02:04:01 brd ff:ff:ff:ff:ff:ff
inet 10.110.32.1/21 brd 10.110.39.255 scope global bat0
valid_lft forever preferred_lft forever
inet6 2a03:2260:300b:204::1/64 scope global
valid_lft forever preferred_lft forever
inet6 fe80::acc9:d6ff:fe2b:3968/64 scope link
valid_lft forever preferred_lft forever
root@node42:~# batctl tr 10.110.32.1
traceroute to 10.110.32.1 (72:8e:0a:4d:07:03), 50 hops max, 20 byte packets
1: 02:00:00:02:05:00 0.235 ms 0.263 ms 0.266 ms
2: 4e:70:0a:55:1a:fb 27.696 ms 25.413 ms 27.730 ms
3: 1e:03:61:52:62:93 27.051 ms 29.464 ms 29.175 ms
4: b2:bf:98:e5:c9:bb 26.780 ms 33.047 ms 35.286 ms
5: 72:8e:0a:4d:07:03 * * 28.838 ms
root@node42:~#

5: bat0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN group default qlen 1000
link/ether 02:00:00:02:03:01 brd ff:ff:ff:ff:ff:ff
inet 10.110.24.1/21 brd 10.110.31.255 scope global bat0
valid_lft forever preferred_lft forever
inet6 2a03:2260:300b:203::1/64 scope global
valid_lft forever preferred_lft forever
inet6 fe80::8c8e:cff:fe09:6c7c/64 scope link
valid_lft forever preferred_lft forever
root@node32:~# batctl tr 10.110.24.1
traceroute to 10.110.24.1 (aa:a5:39:b1:e3:63), 50 hops max, 20 byte packets
1: 02:00:00:02:06:00 0.209 ms 0.317 ms 0.240 ms
2: aa:a5:39:b1:e3:63 11.947 ms 14.116 ms 13.883 ms

root@node22:~# ip a s bat0
5: bat0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN group default qlen 1000
link/ether 02:00:00:02:02:01 brd ff:ff:ff:ff:ff:ff
inet 10.110.16.1/21 brd 10.110.23.255 scope global bat0
valid_lft forever preferred_lft forever
inet6 2a03:2260:300b:202::1/64 scope global
valid_lft forever preferred_lft forever
inet6 fe80::7c68:ffff:fe6c:480e/64 scope link
valid_lft forever preferred_lft forever
root@node22:~# batctl tr 10.110.16.1
traceroute to 10.110.16.1 (72:8e:0a:4d:07:03), 50 hops max, 20 byte packets
1: 02:00:00:02:05:00 0.063 ms 0.103 ms 0.098 ms
2: 4e:70:0a:55:1a:fb 27.590 ms 29.041 ms 29.014 ms
3: 1e:03:61:52:62:93 27.610 ms 25.379 ms 27.543 ms
4: b2:bf:98:e5:c9:bb 28.462 ms 32.701 ms 64.105 ms
5: 72:8e:0a:4d:07:03 * 42.850 ms 32.786 ms

root@node12:~# ip a s bat0
5: bat0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN group default qlen 1000
link/ether 02:00:00:02:01:01 brd ff:ff:ff:ff:ff:ff
inet 10.110.8.1/21 brd 10.110.15.255 scope global bat0
valid_lft forever preferred_lft forever
inet6 2a03:2260:300b:201::1/64 scope global
valid_lft forever preferred_lft forever
inet6 fe80::a4cb:6fff:fe9e:a115/64 scope link
valid_lft forever preferred_lft forever
root@node12:~# batctl tr 10.110.8.1
traceroute to 10.110.8.1 (aa:a5:39:b1:e3:63), 50 hops max, 20 byte packets
1: 02:00:00:02:06:00 0.288 ms 0.205 ms 0.189 ms
2: aa:a5:39:b1:e3:63 12.672 ms 14.053 ms 14.329 ms

root@node12:~# batctl tr 10.110.16.1
Error - mac address of the ping destination could not be resolved and is not a bat-host name: 10.110.16.1
root@node12:~# batctl dc |grep 10.110.16.1
* 10.110.16.1 02:00:00:02:02:01 -1 0:11
root@node12:~# batctl dc |grep 10.110.8.1
* 10.110.8.1 02:00:00:02:01:01 -1 0:00
</pre>

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