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Alex Rivera
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I googled it and some people says "To keep the same size with struct sockaddr". But Kernel will not use sockaddr directly(right?). When using it. kernel will cast it back to what it is. So why is zero padding needed? struct sockaddr { unsigned short sa_family; // address family, AF_xxx char sa_data[14]; // 14 bytes of protocol address }; struct sockaddr_in { short sin_family; // e.g. AF_INET, AF_INET6 unsigned short sin_port; // e.g. htons(3490) struct in_addr sin_addr; // see struct in_addr, below char sin_zero[8]; // zero this if you want to }; struct in_addr { unsigned long s_addr; // load with inet_pton() };
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