My book I had only covered socket programming for Mac and Linux, so I couldn't use it. Then when I got some samples from MSDN or other sites and tested it, those didn't work for me either. Here is one of the WinSock programs I found and the errors I got.
Code:
/*
Live Server on port 8888
*/
#include<io.h>
#include<stdio.h>
#include<winsock2.h>
#pragma comment(lib,"ws2_32.lib") //Winsock Library
int main(int argc , char *argv[])
{
WSADATA wsa;
SOCKET s , new_socket;
struct sockaddr_in server , client;
int c;
char *message;
printf("\nInitialising Winsock...");
if (WSAStartup(MAKEWORD(2,2),&wsa) != 0)
{
printf("Failed. Error Code : %d",WSAGetLastError());
return 1;
}
printf("Initialised.\n");
//Create a socket
if((s = socket(AF_INET , SOCK_STREAM , 0 )) == INVALID_SOCKET)
{
printf("Could not create socket : %d" , WSAGetLastError());
}
printf("Socket created.\n");
//Prepare the sockaddr_in structure
server.sin_family = AF_INET;
server.sin_addr.s_addr = INADDR_ANY;
server.sin_port = htons( 8888 );
//Bind
if( bind(s ,(struct sockaddr *)&server , sizeof(server)) == SOCKET_ERROR)
{
printf("Bind failed with error code : %d" , WSAGetLastError());
exit(EXIT_FAILURE);
}
puts("Bind done");
//Listen to incoming connections
listen(s , 3);
//Accept and incoming connection
puts("Waiting for incoming connections...");
c = sizeof(struct sockaddr_in);
while( (new_socket = accept(s , (struct sockaddr *)&client, &c)) != INVALID_SOCKET )
{
puts("Connection accepted");
//Reply to the client
message = "Hello Client , I have received your connection. But I have to go now, bye\n";
send(new_socket , message , strlen(message) , 0);
}
if (new_socket == INVALID_SOCKET)
{
printf("accept failed with error code : %d" , WSAGetLastError());
return 1;
}
closesocket(s);
WSACleanup();
return 0;
}
Code:
Errors :
(.text+0x38): undefined reference to `WSAStartup@8'
(.text+0x44): undefined reference to `WSAGetLastError@0'
(.text+0x86): undefined reference to `socket@12'
(.text+0x97): undefined reference to `WSAGetLastError@0'
(.text+0xd2): undefined reference to `htons@4'
:(.text+0xf9): undefined reference to `bind@12'
(.text+0x106): undefined reference to `WSAGetLastError@0'
(.text+0x141): undefined reference to `listen@8'
(.text+0x1ad): undefined reference to `send@16'
(.text+0x1cf): undefined reference to `accept@12'
(.text+0x1e6): undefined reference to `WSAGetLastError@0'
(.text+0x208): undefined reference to `closesocket@4'
(.text+0x210): undefined reference to `WSACleanup@0'
collect2: ld returned 1 exit status
I compiled the program like this :
Code:
gcc internet.c -o in.exe 2> errors.txt
How do I make it so I can compile winsock programs and be able to learn more about them (eventually being able to make my own)?