Cannot assign requested address for bind the socket - c

Question

I checked my code but I don't know why the program can't bind the socket.
I tried many ip and ports(even 127.0.0.1) but it still don't works...
Here is the code I'm using :
//error message
void error (const char *msg)
{
perror(msg);
exit(1);
}
int main ()
{
int sock, cli_sock, portno;
char buffer[1024];
char response[18432];
struct sockaddr_in serv_addr, cli_addr;
socklen_t cli_len;
//creating socket
sock = socket(AF_INET, SOCK_STREAM, 0);
if(sock < 0)
error("Error opening socket");
bzero ((char *) &serv_addr, sizeof(serv_addr));
//giving port number
portno = 50005;
//giving ip address
serv_addr.sin_family = AF_INET;
serv_addr.sin_addr.s_addr = inet_addr("127.0.0.1");
serv_addr.sin_port = htons(portno);
//bind socket
if(bind(sock, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) != 0)
error("Binding failed.");
//listen
listen(sock, 5);
cli_len = sizeof(cli_addr);
//accept
cli_sock = accept(sock, (struct sockaddr *) &cli_addr, &cli_len);
if(cli_sock != 0)
error("Error on accepting");
}
(This is just the socket part of the server code and just for more info, my client version is for Windows and my server version is for Linux)
This is my output when I run the program :
Binding failed.: Cannot assign requested address

Answer 1

For TCP the setup for client and server were:
Server:
socket (create listening socket)
bind (listening socker to local address:port)
listen (make listening socket actually listen)
(accept loop header)
accept (have listening socket wait for incoming connections; returns accepted socket on succesful connection)
read/write (from/to accepted socket!)
shutdown (accepted socket; optional)
close (accepted socket)
(loop footer)
shutdown (listening socket; optional)
close (listening socket)
Client:
socket
bind (to local address:port, optional and uncommon)
connect (to remote address:port, those the server was bound to)
read/write
shutdown (optional)
close