* first 2 bytes: Address Family,
* next 2 bytes: port,
* next 2 bytes: ipaddr,
* next 8 bytes: zeroes.
Not with any correct C compiler, it wont. Here's a simple test program I ran on Linux:
#include <stdio.h>
int main()
{
char filler[16] = {0};
int i;
unsigned short s1 = 0xFFFF;
unsigned long l1 = 0xFFFFFFFF;
filler[0] = (unsigned short)s1;
filler[2] = (unsigned short)s1;
filler[4] = (unsigned long)l1;
for (i = 0; i < 8; i++)
printf("filler[%d] = %d\n", i, filler[i]);
}
$ gcc filler.c
$ ./a.out
filler[0] = -1
filler[1] = 0
filler[2] = -1
filler[3] = 0
filler[4] = -1
filler[5] = 0
filler[6] = 0
filler[7] = 0
struct sockaddr_in serv_addr;
...
serv_addr.sin_port = htons(port);