I set a timeout for recvfrom() by calling select() on a UDP socket:
socket()=sendto()=select()=recvfrom().
It seems that it need not call bind() or connect() for UDP socket here.
This method is recommended by
UNIX Network Programming Volum1 Networking APIs: Sockets and XTI(Second Edition),
On Fri, Oct 31, 2003 at 01:14:17PM +0800, zhouxin wrote:
Cygwin implementation of select() take 100% CPU under multi-thread environment
sometimes.
[...]
if((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) 0){
fprintf(stderr, cannot open socket for udp packet!\n);
exit(1);
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