[a] socket / socketpair #include <sys/socket.h> int socket(int domain, int type, int protocol) int socketpair(int domain, int type, int protocol, int sv[2])//成功返回套接字描述符,出错返回 -1 套接字描述符本质上是就是文件描述符 socket 类型由三个参数共同确定 domain:AF_UNIX / AF_LOCAL / AF_INE
The getaddrinfo function provides protocol-independent translation from an ANSI host name to an address. int getaddrinfo( PCSTR pNodeName, PCSTR pServiceName, ADDRINFOA *pHints, PADDRINFOA *ppResult ); pNodeName [in,可选]指向NULL终止的ANSI字符串的指针,