Socket地址结构

IPv4 socket地址结构通常也称为“网际socket地址结构”，它以sockaddr_in命名，定义在<netinet/in.h>

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struct in_addr {

        in_addr_t s_addr; /*32-bit IPv4 address*/

};

 

struct sockaddr_in {

        uint8_t     sin_len;

        sa_family_t sin_family; /*AF_INET*/

        in_port_t   sin_port;

        struct in_addr sin_addr;

        char sin_zero[8];

};

 通用的socket地址结构如下：

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struct sockaddr {

        uint8_t sa_len;

        sa_family_t sa_family; /*address family: AF_XXX value*/

        char sa_data[14]; /*protocol-specific address*/

};