[Nice] problem when using libnice0.0.12 and a tiny bug

[Youness Alaoui]

Hi,

First, I notice the Username/password are both NULL in your candidates.. maybe
you didn't set them correctly ? or if you're using the RFC compatibility mode,
did you call the nice_agent_set_remote_credentials function ?
You're not giving me enough information to understand your issue.. I don't know
the compatibility mode you used, I don't have the logs from both sides either,
make sure both sides are setting their candidates properly.
Also, it fails to establish the connection because it doesn't receive any data..
did you call the nice_agent_attach_recv function properly ?
I also noticed that the only candidate you have is 10.1.31.222 which seems to be
a local candidate, if the call is not being made inside the same local netword,
then it won't work, you might need to set the STUN server on your agent for it
to do proper NAT traversal.

Youness.

jiayu zeng wrote:
> Hi all,
>       I use libnice0.0.12 in our project to do NAT traversing, however
> there is a problem.
>      when I get peer's candidates and then using
> nice_agent_set_remote_candidates() to set candidates, however the
> connection check always fail! here is the debug message:
> 
> (process:18123): libnice-DEBUG: Agent 0x91bb868: set_remote_candidates 1 1
> (process:18123): libnice-DEBUG: Agent 0x91bb868 : Adding remote
> candidate with addr [10.1.31.222]:56708 for s1/c1. U/P '(null)'/'(null)'
> prio: 152912400
> (process:18123): libnice-DEBUG: Agent 0x91bb868 : creating new pair
> 0x91e5e28 state 5
> (process:18123): libnice-DEBUG: Agent 0x91bb868 : Adding remote
> candidate with addr [10.1.31.222]:56708
> (process:18123): libnice-DEBUG: Agent 0x91bb868 : added a new conncheck
> 0x91e5e28 with foundation of '1:1' to list 1.
> (process:18123): libnice-DEBUG: Agent 0x91bb868 : stream 1 component 1
> STATE-CHANGE 1 -> 2.
> (process:18123): libnice-DEBUG: Agent 0x91bb868 : Pair 0x91e5e28 with
> s/c-id 1/1 (1:1) unfrozen.
> (process:18123): libnice-DEBUG: Agent 0x91bb868 : pair 0x91e5e28 state
> WAITING remote candidate addr[10.1.31.222]:56708
> (process:18123): libnice-DEBUG: Agent 0x91bb868 :
> priv_conn_check_unfreeze_next returned 1
> (process:18123): libnice-DEBUG: Agent 0x91bb868 : pair 0x91e5e28 state
> IN_PROGRESS
> (process:18123): libnice-DEBUG: Agent 0x91bb868 :  remote candidate with
> addr [10.1.31.222]:56708
> (process:18123): libnice-DEBUG: pair 0x91e5e28 Agent 0x91bb868 : STUN-CC
> REQ to '10.1.31.222 <http://10.1.31.222>:34013', socket=8, pair=1:1
> (c-id:1), tie=16361108746083089059, username='l=\u001c    ' (0),
> password='' (0), priority=1845494271.
> (process:18123): libnice-DEBUG: Agent 0x91bb868 : STUN connectivity
> check was cancelled, marking as done.
> (process:18123): libnice-DEBUG: Agent 0x91bb868 : pair 0x91e5e28 state
> FAILED
> (process:18123): libnice-DEBUG: Agent 0x91bb868 : timer tick #1: 0
> frozen, 0 in-progress, 0 waiting, 0 succeeded, 0 discovered, 0
> nominated, 0 waiting-for-nom.
> (process:18123): libnice-DEBUG: Agent 0x91bb868 :
> priv_conn_check_tick_unlocked returned 1
> (process:18123): libnice-DEBUG: Agent 0x91bb868 :
> conn_check_schedule_next returning 1
> 
> (process:18123): libnice-DEBUG: Agent 0x91bb868 : timer tick #2: 0
> frozen, 0 in-progress, 0 waiting, 0 succeeded, 0 discovered, 0
> nominated, 0 waiting-for-nom.
> (process:18123): libnice-DEBUG: Agent 0x91bb868 :
> priv_conn_check_tick_unlocked: stopping conncheck timer
> (process:18123): libnice-DEBUG: Agent 0x91bb868 : stream 1 component 1
> STATE-CHANGE 2 -> 5.
> (process:18123): libnice-DEBUG: Agent 0x91bb868 : conn.check list
> status: 0 nominated, 0 succeeded, c-id 1.
> (process:18123): libnice-DEBUG: Agent 0x91bb868 : changing conncheck
> state to COMPLETED.
> 
> I found that the peer's port is erro in the debug message, and then I
> find a debug bug in conncheck.c line 1657,should we use ntohs here??but
> this is not the essencial problem. I use netstat -aun in peer, and I
> find the udp port 56708 is opend,but why the connection check always fail?
> 
> I'm soory for my poor english, but hope you can understand what I say:)
> 
> thanks a lot!
> 
>  
> 
> 
> ------------------------------------------------------------------------
> 
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