binding server socket to port fails (C) - c

Question

My code will always proc the "Binding Failure" error and I do not know why. I have read the man page multiple times and I can't find anything wrong with the code, can someone please steer me in the right direction?
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <netdb.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#define PORT 3490
#define BACKLOG 10
int main()
{
struct sockaddr_in server;
struct sockaddr_in dest;
int status,socket_fd, client_fd,num;
socklen_t size;
char buffer[10241];
char *buff;
// memset(buffer,0,sizeof(buffer));
int yes =1;
if ((socket_fd = socket(AF_INET, SOCK_STREAM, 0))== -1) {
fprintf(stderr, "Socket failure!!\n");
exit(1);
}
if (setsockopt(socket_fd, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(int)) == -1) {
perror("setsockopt");
exit(1);
}
memset(&server, 0, sizeof(server));
memset(&dest,0,sizeof(dest));
server.sin_family = AF_INET;
server.sin_port = htons(PORT);
server.sin_addr.s_addr = INADDR_ANY;
if ((bind(socket_fd, (struct sockaddr *)&server, sizeof(struct sockaddr )))== -1) { //sizeof(struct sockaddr)
fprintf(stderr, "Binding Failure\n");
exit(1);
//other irrelevant code starts here

Answer 1

If netstat -an|grep 3490 really shows 127.0.0.1 you have another process listening at the port, bound to 127.0.0.1 instead of INADDR_ANY, which is why the SO_REUSEADDR didn't work. But you will never know for sure until you take my advice above.

Answer 2

After using perror, I found that the address was taken and I switched to another port and it worked!