Socket server, working on specific network interface address - c

Question

I have a simple tcp client server program. Client sends text, server prints it ito terminal. I need to make it so client can connect to server by ip address, no just a port. Tried changing something in my localhost server, but it only broke it and it doesn't work anymore. What's whong in it?
Here's the server code:
int server(int port)
{
int fd;
struct ifreq ifr;
char * addres;
fd = socket(AF_INET, SOCK_STREAM, 0);
/* I want to get an IPv4 IP address */
ifr.ifr_addr.sa_family = AF_INET;
/* I want IP address attached to "eth0" */
strncpy(ifr.ifr_name, "em0", IFNAMSIZ-1);
ioctl(fd, SIOCGIFADDR, &ifr);
close(fd);
addres=inet_ntoa(((struct sockaddr_in *)&ifr.ifr_addr)->sin_addr);
//until this part, i'm getting my em0 address to a variable which I want to use later
//to specify on which address I want my server to be
int s, s2, t, len;
int z;
struct sockaddr_in local, remote;
char str[100];
if ((s = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
perror("socket");
exit(1);
}
local.sin_family = AF_INET;
local.sin_addr.s_addr = inet_addr(addres); //inet_addr(inet_ntoa(((struct sockaddr_in *)&ifr.ifr_addr)->sin_addr));
printf("binder");
if (bind(s, (struct sockaddr *)&local, sizeof(local)) == -1) {
perror("bind");
exit(1);
}
if (listen(s, 5) == -1) {
perror("listen");
exit(1);
}
for(;;) {
int done, n;
printf("Waiting for a connection...\n");
t = sizeof(remote);
if ((s2 = accept(s, (struct sockaddr *) &remote, (socklen_t *) &t)) == -1) {
perror("accept");
exit(1);
}
printf("Connected...\n");
done = 0;
do {
n = recv(s2, str, 100, 0);
if (n <= 0) {
if (n < 0) perror("recv");
done = 1;
}
if (!done)
printf("%s", str);
fflush(stdout);
sleep(1);
} while (!done);
close(s2);
}
return 0;
}
It should start listening at given port, and on em0 interface address, but it seems to be doing nothing at all. In driver function I just pass the int representing port which I want to use.
Can I connect my client with that server using ip address?
My driver funtion chooses if I want to start a server or a client, it's all in one file.
To start a server i use:
./main.o -l [port]
and to start a client I'd want to use:
./main.o [address] [port]
Client seems to be working fine, just refuses to connect, only problem (as far as I'm aware) is a server. Maybe you'll catch what am I doing wrong, I'm sitting with it for couple of hours basically hopeless.