How can i get ip and port under forward proxy

[Maxim Dounin]

Hello!

On Thu, Jun 06, 2013 at 09:29:36PM -0400, honwel wrote:

> Thanks, i add a line " len = NGX_SOCKADDRLEN ", then , it is ok!  thanks
> very much.
> but i want to know , why?  (struct sockaddr *) &sa and &len as are input
> paramter, why len need initialized?

As I already said, len value is used as an input parameter by 
getsockname() function, and hence it must be initialized properly.

See here for more details:

http://pubs.opengroup.org/onlinepubs/9699919799/functions/getsockname.html

: The address_len argument points to a socklen_t object which on 
: input specifies the length of the supplied sockaddr structure, and 
: on output specifies the length of the stored address. If the 
: actual length of the address is greater than the length of the 
: supplied sockaddr structure, the stored address shall be 
: truncated.

-- 
Maxim Dounin
http://nginx.org/en/donation.html