Connect Keeps Failing With Error 10049 in C - c

Question

I'm new to socket programming and this is my first server-client program. The program was working perfectly fine at first, but when I copied my code from Server.c and Client.c to a new project in Visual Studio, my client is now refusing to connect and throws the error 10049. I can still connect to my server if I use telnet from command prompt.
I am surprised as to why my client would stop working when I copy the code to another empty project, nothing else has changed.
I have tried changing IP addresses, port numbers and port forwarding using my public address to no avail. I have confirmed my computer's IP using ipconfig and it is correctly inputted in my code, as well as the port number. The program compiles fine with no errors whatsoever.
Server.c
#include <winsock2.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <WS2tcpip.h>
#pragma comment (lib, "Ws2_32.lib")
void start_server(const char* ip_address, int port_number);
int server_sock, client_sock;
void main(int argc, char* argv[])
{
start_server("192.168.0.24", 100);
system("pause");
}
void start_server(const char* ip_address, int port_number)
{
WSADATA wsaData;
int iResult = WSAStartup(MAKEWORD(2, 2), &wsaData);
if (iResult != NO_ERROR) {
wprintf(L"WSAStartup() failed with error: %d\n", iResult);
return 1;
}
struct sockaddr_in server_addr;
memset(&server_addr, 0, sizeof(server_addr));
server_addr.sin_family = AF_INET;
server_addr.sin_port = htons(port_number);
InetPton(AF_INET, "", &server_addr.sin_addr.s_addr);
server_sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (server_sock == INVALID_SOCKET)
{
printf(L"Socket creation failed with error: %ld\n", WSAGetLastError());
}
else
{
printf("Socket created!\n");
}
int bind_status = bind(server_sock, (struct sockaddr*) & server_addr, sizeof(server_addr));
if (bind_status == SOCKET_ERROR) {
wprintf(L"bind failed with error: %ld\n", WSAGetLastError());
}
else
{
printf("Bind was successful!\n");
}
int listen_status = listen(server_sock, 3);
if (listen_status == -1)
{
wprintf(L"listen failed with error: %ld\n", WSAGetLastError());
}
else
{
printf("Listening...\n");
}
client_sock = accept(server_sock, NULL, NULL);
if (client_sock == -1)
{
wprintf(L"client socket failed with error: %ld\n", WSAGetLastError());
}
else
{
printf("Accepted new client!\n");
}
}
Client.c
#include <winsock2.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <WS2tcpip.h>
#pragma comment (lib, "Ws2_32.lib")
void connect_server(const char* ip_address, int port_number);
int sock;
void main()
{
connect_server("192.168.0.24", 100);
send(sock, "test", 5, 0);
system("pause");
}
void connect_server(const char* ip_address, int port_number)
{
WSADATA wsaData;
int iResult = WSAStartup(MAKEWORD(2, 2), &wsaData);
if (iResult != NO_ERROR) {
wprintf("WSAStartup() failed with error: %d\n", iResult);
exit(1);
}
struct sockaddr_in server_addr;
memset(&server_addr, 0, sizeof(server_addr));
server_addr.sin_family = AF_INET;
server_addr.sin_port = htons(port_number);
InetPton(AF_INET, ip_address, &server_addr.sin_addr.s_addr);
sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (sock == INVALID_SOCKET)
{
printf("Socket creation failed with error: %d\n", WSAGetLastError());
}
else
{
printf("Socket created!\n");
}
int connection_status = connect(sock, (struct sockaddr *) &server_addr, sizeof(server_addr));
if (connection_status == SOCKET_ERROR)
{
printf("Connection failed with error: %d\n", WSAGetLastError());
}
else
{
printf("Connected.\n");
}
}

Answer 1

A very fast/simple search for WSA error 10049 results in:
Winsock error 10049 typically occurs when you attempt to create a socket with an address not on this machine. For example if you have MDaemon running on a machine with an IP address of 192.168.0.1 and you attempt to bind MDaemon to 192.168.0.100 you will receive this error message.
So, you need to correct the IP address for the new computer.

Answer 2

Try using your code with loopback address 127.0.0.1. If it works then definitely problem is with the combination of IP and Port number. Maybe use ipconfig /reset to reset your ip address.