1 #include "syshdrs.h"
2 
3 int
4 SBind(int sockfd, const int port, const int nTries, const int reuseFlag)
5 {
6 	unsigned int i;
7 	int on;
8 	int onsize;
9 	struct sockaddr_in localAddr;
10 
11 	localAddr.sin_family = AF_INET;
12 	localAddr.sin_addr.s_addr = htonl(INADDR_ANY);
13 	localAddr.sin_port = htons((unsigned short) port);
14 
15 	if (reuseFlag != kReUseAddrNo) {
16 		/* This is mostly so you can quit the server and re-run it
17 		 * again right away.  If you don't do this, the OS may complain
18 		 * that the address is still in use.
19 		 */
20 		on = 1;
21 		onsize = (int) sizeof(on);
22 		(void) setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR,
23 			(char *) &on, onsize);
24 
25 #ifdef SO_REUSEPORT
26 		/* Tells kernel that it's okay to have more
27 		 * than one process originating from this
28 		 * local port.
29 		 */
30 		on = 1;
31 		onsize = (int) sizeof(on);
32 		(void) setsockopt(sockfd, SOL_SOCKET, SO_REUSEPORT,
33 			(char *) &on, onsize);
34 #endif	/* SO_REUSEPORT */
35 	}
36 
37 	for (i=1; ; i++) {
38 		/* Try binding a few times, in case we get Address in Use
39 		 * errors.
40 		 */
41 		if (bind(sockfd, (struct sockaddr *) &localAddr, sizeof(struct sockaddr_in)) == 0) {
42 			break;
43 		}
44 		if ((int) i == nTries) {
45 			return (-1);
46 		}
47 		/* Give the OS time to clean up the old socket,
48 		 * and then try again.
49 		 */
50 		sleep(i * 3);
51 	}
52 
53 	return (0);
54 }	/* SBind */
55 
56 
57 
58 
59 int
60 SListen(int sfd, int backlog)
61 {
62 	return (listen(sfd, (unsigned int) backlog));
63 }	/* SListen */
64