socket 设置接收超时

socket 设置接收超时

代码实现

Linux 代码

struct timeval time;  
time.tv_sec = 1;  
time.tv_usec = 0;  
setsockopt(sockfd, SOL_SOCKET, SO_RCVTIMEO, &time, sizeof(time));

Windows 代码

DWORD time = 1000;  
setsockopt(sockfd, SOL_SOCKET, SO_RCVTIMEO, &time, sizeof(time));

注意

Windows:
Timeout value is a DWORD in milliseconds, address passed to setsockopt() is const char*
Linux:
Timeout value is a struct timeval, address passed to setsockopt() is const void*

Windows 上即使设置接收超时，若对方端口关闭，发送数据后 recv() 接收函数会立即返回，对应错误码 WSAECONNRESET 10054 。
f**k windows 😃

setsockopt() 具体实现是平台相关的，跨平台时需要谨慎，避免使用不兼容的选项。

参考链接

• Set timeout for winsock recvfrom - stackoverflow
• setsockopt function (winsock.h) - msdn
• Windows Sockets Error Codes - msdn