[Dnsmasq-discuss] 2.53rc2

[clemens fischer]

Matthias Andree wrote:

> clemens fischer wrote on 2010-05-25:
> 
>> I let dnsmasq forward dns queries to bind-9, which worked fine
>> yesterday.  Today I get log lines like:
>>
>>     dnsmasq: failed to create listening socket: Address already in use
>>
>> and
>>
>>     dnsmasq: failed to bind server socket for : Address family not
>>     supported by protocol
> 
> No idea about the former.
> 
> The latter looks like a mismatch between the PF_ used for the socket()  
> call and the AF_ used for bind().
> 
>> I'd very much like dnsmasq to say what port/adress family makes trouble.
> 
> Assuming Linux or one of the supported BSDs, try:
> 
> strace -e trace=network dnsmasq -d [other dnsmasq options]
> 
> Other systems might provide truss or ktrace/kdump.

Programs should supply enough information with an error message.  The
program knows exactly what it's currently trying to do and in what way
it failed.  OTOH, reading and understanding traces can be a very time
consuming process.


clemens