hello,

im sorry that i forget mention the answer to the mailing list before :)

thank you for your answer. I did your suggestion no. 1 and 2

i have question related to your answer.

...

1. is it true that i set ibrdtnd.conf with the following config ?

routing = none

routing_forwarding = yes

route1 = dtn://nodeC.dtn dtn://nodeB.dtn

Nearly. I think you should use dtn://nodeC.dtn/* for the regular expression to match.

...

2. how about ibrdtnd.conf for node B and C, what can i configure?

at node B, you can leave routing=default and routing_forwarding = yes, if you want node c to answer via node b (i.e. ping reply), then you have to add route1 = dtn://nodeA.dtn/* dtn://nodeB and also routing=none.

(beware, node names are case sensitive!)

...

3. i start ibrdtn using "dtnd -i wlan0", how can i start it with -v,

can you give me an example ?

sure. dtnd -i wlan0 -c /path/to/config -v

and then i start ibrdtn with the syntax above (no.3), but when i ping nodeC from nodeA i got this error

"terminate called after throwing an instance of 'ibrcommon::IOException' what() : could not create a temporary name aborted"

and the ibrdtn service stop

what's the meaning of this error and how can i fixed this ?

thankyou :)