linux socket编程---accept

最新推荐文章于 2024-04-07 23:34:22 发布

原创

最新推荐文章于 2024-04-07 23:34:22 发布 · 521 阅读

0 ·

CC 4.0 BY-SA版权

文章标签：

#socket编程 #accept #linux socket #linux accept

本文介绍了Linux下socket编程中accept函数的使用，包括函数原型、使用顺序、使用场景和实例。接受TCP连接请求时，服务器通过调用accept获取新的描述字，以建立与客户端的连接。结合select，服务器可以高效监听多个端口。

一、函数原型

DESCRIPTION:
 *   The accept function is used with connection-based socket types
 *   (SOCK_STREAM, SOCK_SEQPACKET and SOCK_RDM). It extracts the first
 *   connection request on the queue of pending connections, creates a new
 *   connected socket with mostly the same properties as 'sockfd', and
 *   allocates a new socket descriptor for the socket, which is returned. The
 *   newly created socket is no longer in the listening state. The original
 *   socket 'sockfd' is unaffected by this call.  Per file descriptor flags
 *   are not inherited across an accept.
 * 
int accept(int sockfd, 
		   FAR struct sockaddr *addr,
		   FAR socklen_t *addrlen)

TCP客户端依次调用socket()、connect()之后就想TCP服务器发送了一个连接请求。TCP服务器监听到这个请求之后，就会调用accept()函数取接收请求，这样连接就建立好了。