[lwip-users] sockaddr structure

[brivero]

Hello to everybody,

I have decided to ask for your helpful
advice once again. This time my question deals with the sockaddr structure,
more concretely with the sockaddr_in:

struct sockaddr_in {      
         (from sockets.h, where
lwip/ip_addr.h is included)
  u8_t sin_len;
  u8_t sin_family;
  u16_t sin_port;
  struct in_addr sin_addr;
  char sin_zero[8];
};

I would like to use this structure with
both ipv4 and ipv6, and the problem is that I see that the in_addr is declared
in the ip_addr.h belonging to the ipv4 folder, but I find no in_addr declaration
in the ip_addr.h inside the ipv6 folder. In this file, there is declared
a structure named ip_addr that should be the same, but I do not see where
the name translation takes place. I suppose that they must be the same
because they are very similar:

struct in_addr {      
         (ipv4)    
           struct ip_addr
{                 (ipv6)
  u32_t s_addr;      
               
             u32_t addr[4];
};        
               
               };

What am I losing here???

Thank you very much for your answer.