Questions regarding ipv6 and bind9

[Ford, Michael]

Hello all,
 

My friend and I are messing around with ipv6 on BIND9.  We have created
the following zone file:

 

$TTL 1D

$ORIGIN example.com.

@              IN  SOA   @  root (

                         1   ; Serial

                         8H  ; Refresh

                         15M ; Retry

                         1W  ; Expire

                         1D) ; Minimum TTL

               IN   NS   @

               IN   AAAA    2001:0db8:85a3:08d3:1319:a82e:0370:7344

 

And we have the following code snippet to test our dns server:

 

int main()

{

 

            ////////////////////// IPv6 ///////////////////////

            struct addrinfo *aInfo;

            char straddr[INET6_ADDRSTRLEN];

 

            struct sockaddr_in6 target;

 

            if(getaddrinfo("example.com", NULL, NULL, &aInfo) != 0)

            {

                        printf("ERROR");

                        perror("getaddrinfo");    

                        return 0;

            }

 

            printf("aInfo->ai_addrlen is: %d\n", aInfo->ai_addrlen);

 

            memset((char *)&target, 0, sizeof(target));

            memcpy((char*)&target.sin6_addr, aInfo->ai_addr,
aInfo->ai_addrlen);

 

            printf("addrInfo = %s\n", inet_ntop(AF_INET6,
&target.sin6_addr, straddr, sizeof(straddr)));

 

            return 0;

}

 

 

However, when we run out code, we get the following output:

 

$ ./a.out

aInfo->ai_addrlen is: 28

addrInfo = a00::2001:db8:85a3:8d3

 

I have no problem with cutting off the leading zeros, but what is the
a00:: doing in front of the ip address, and why is the full ip address
not being printed?

 

-Mike-