Socket with recv-timeout: What is wrong with this code?

Question

I\'m trying to implement a socket with a recv timeout of 1 Second:

int sockfd;
struct sockaddr_in self;
struct sockaddr_in client_addr;
int addrlen=sizeof(clien         


        

Answer 1

Here's a snippet using select:

FD_ZERO(&masterfds);
FD_SET(sockfd,&masterfds);
memcpy(&readfds,&masterfds,sizeof(fd_set));
timeout.tv_sec = 2;
timeout.tv_usec = 0;
if (select(sockfd+1, &readfds, NULL, NULL, &timeout) < 0)
{
    printf("select error");
    exit(1);
}

if (FD_ISSET(sockfd, &readfds))
{
    //printf("Read from socket\n");
    // read from the socket
    res = recvfrom(sockfd, (char *)hdrbuf, sizeof(hdrbuf), MSG_PEEK, recvaddr, address_len);
}
else
{
    // the socket timedout
    //printf("Socket timeout started=%d\n",packets_started);