摘要：
1. IPv4: struct sockaddr_in, 16个字节 1 struct sockaddr_in { 2 sa_family_t sin_family; /* AF_INET */ 3 in_port_t sin_port; /* Port number. */ 4 struct in_addr sin_addr; /* Internet address. */ 5 6 /* Pad to size of `struct sockaddr'. */ 7 ... 阅读全文