Question about getting IPv4 address of a host?

See more:

C

Windows

sockets

Hello guys
I use windows function getaddrinfo to get the IPv4 address of a host.

struct addrinfo * aiList = NULL;
struct addrinfo aiHints;
//initialize aiHints here
aiHints.ai_family = AF_INET;
int iResult = getaddrinfo( szHostName, NULL, &aiHints, &aiList );
const struct addrinfo * aiPtr = aiList;
while ( aiPtr != NULL )
{
    const struct sockaddr * pSockAddr = aiPtr->ai_addr;
//  print contents of pSockAddr code here
    aiPtr = aiPtr->ai_next;
}

declaration for struct sockaddr is:

struct sockaddr {
 ushort sa_family;
 char sa_data[14];
};

The function succeed and the values of aiPtr->ai_addr->sa_data for localhost is as follows
{ 0, 0, 127, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }
Why two leading zeros here?
May it be ai_addr is of type struct sockaddr_in and The two leading zeros is member sin_port of sockaddr_in?

struct sockaddr_in{
   short sin_family;
   unsigned short sin_port;
   struct in_addr sin_addr;
   char sin_zero[8];
}

I'm confused. can any body clarify whats happening?
Thanks in advance

Edit: the original subject was this:
Question about struct addrinfo returned by getaddrino