SBind.c File Reference

#include "syshdrs.h"

Include dependency graph for SBind.c:

Go to the source code of this file.

Functions
int	SBind (int sockfd, const int port, const int nTries, const int reuseFlag)
int	SListen (int sfd, int backlog)

Function Documentation

SBind()

int SBind	(	int	sockfd,
		const int	port,
		const int	nTries,
		const int	reuseFlag
	)

Definition at line 4 of file SBind.c.

{
    unsigned int i;
    int on;
    int onsize;
    struct sockaddr_in localAddr;
 
    localAddr.sin_family = AF_INET;
    localAddr.sin_addr.s_addr = htonl(INADDR_ANY);
    localAddr.sin_port = htons((unsigned short) port);
 
    if (reuseFlag != kReUseAddrNo) {
        /* This is mostly so you can quit the server and re-run it
         * again right away.  If you don't do this, the OS may complain
         * that the address is still in use.
         */
        on = 1;
        onsize = (int) sizeof(on);
        (void) setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR,
            (char *) &on, onsize);
 
#ifdef SO_REUSEPORT
        /* Tells kernel that it's okay to have more
         * than one process originating from this
         * local port.
         */
        on = 1;
        onsize = (int) sizeof(on);
        (void) setsockopt(sockfd, SOL_SOCKET, SO_REUSEPORT,
            (char *) &on, onsize);
#endif  /* SO_REUSEPORT */
    }
 
    for (i=1; ; i++) {
        /* Try binding a few times, in case we get Address in Use
         * errors.
         */
        if (bind(sockfd, (struct sockaddr *) &localAddr, sizeof(struct sockaddr_in)) == 0) {
            break;
        }
        if ((int) i == nTries) {
            return (-1);
        }
        /* Give the OS time to clean up the old socket,
         * and then try again.
         */
        sleep(i * 3);
    }
 
    return (0);
}   /* SBind */

Referenced by SNewDatagramServer(), and SNewStreamServer().

SListen()

int SListen	(	int	sfd,
		int	backlog
	)

Definition at line 60 of file SBind.c.

{
    return (listen(sfd, (unsigned int) backlog));
}   /* SListen */

Referenced by SNewStreamServer().