Server client using select() - c

Question

I want to implement a server-client monothreaded, using select();
For the server part, I took the code from http://www.binarytides.com/code-tcp-socket-server-winsock/ and for the client, the site does not provide some code, they use netcat to simulate the client. So, for the client, I am using this code:-
#include <stdio.h>
#include <winsock2.h
#pragma comment(lib,"ws2_32.lib")
int main(void) {
struct sockaddr_in si_other;
int s, slen=sizeof(si_other);
char buf[512];
char message[512];
WSADATA wsa;
//Initialise winsock
printf("\nInitialising Winsock...");
if (WSAStartup(MAKEWORD(2,2),&wsa) != 0)
{
printf("Failed. Error Code : %d",WSAGetLastError());
exit(EXIT_FAILURE);
}
printf("Initialised.\n");
//create socket
if ( (s=socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) == SOCKET_ERROR)
{
printf("socket() failed with error code : %d" , WSAGetLastError());
exit(EXIT_FAILURE);
}
//setup address structure
memset((char *) &si_other, 0, sizeof(si_other));
si_other.sin_family = AF_INET;
si_other.sin_port = htons(8888);
si_other.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");
//start communication
while(1)
{
printf("Enter message : ");
gets(message);
//send the message
if (sendto(s, message, strlen(message) , 0 , (struct sockaddr *) &si_other, slen) == SOCKET_ERROR)
{
printf("sendto() failed with error code : %d" , WSAGetLastError());
exit(EXIT_FAILURE);
}
//receive a reply and print it
//clear the buffer by filling null, it might have previously received data
memset(buf,'\0', BUFLEN);
//try to receive some data, this is a blocking call
if (recvfrom(s, buf, BUFLEN, 0, (struct sockaddr *) &si_other, &slen) == SOCKET_ERROR)
{
printf("recvfrom() failed with error code : %d" , WSAGetLastError());
exit(EXIT_FAILURE);
}
puts(buf);
}
closesocket(s);
WSACleanup();
return 0;
}
Even the server and the client have the same port, the client always returns -1 meaning that he don't send any message to server. Can someone please tell me what I am doing wrong here? Any tips would be appreciated.
Thanks.