#ifndef FD_UTILS_H_
#define FD_UTILS_H_
#ifdef __cplusplus
extern "C" {
#endif
// inspect errno if any of these fails

/**
* set the file descriptor to non-blocking
* @param fd file descriptor
* @return 0 on success -1 on failure
*/
int set_nonblocking(int fd);

/**
* set the file descriptor to blocking
* @param fd file descriptor
* @return 0 on success -1 on failure
*/
int set_blocking(int fd);

/**
* set the socket file descriptor to SO_REUSEADDR
* @param fd file descriptor
* @return 0 on success -1 on failure
*/
int set_reuseaddr(int sockfd);

/**
* enable TCP keepalive on the socket
* @param fd file descriptor
* @return 0 on success -1 on failure
*/
int set_tcp_keepalive(int sockfd);

/**
* Set the socket send timeout, in miliseconds
* @param fd file descriptor
* @return 0 on success -1 on failure
*/
int set_send_timeout(int sockfd,long timeoutms);

/**
* Set the socket receive timeout, in miliseconds
* @param fd file descriptor
* @return 0 on success -1 on failure
*/
int set_receive_timeout(int sockfd,long timeoutms);

/*
* Set the IP DSCP (differnetiated services code point) header value
* The dscp must be < 64
* @param fd file descriptor
* @return 0 on success -1 on failure
*/
int set_ip_dscp(int fd, unsigned int dscp);


#ifdef __cplusplus
};
#endif
#endif /* FD_UTILS_H_ */