Client: Failed to connect
Hi all, i want to know what happen to my program.That program failed to connect at 127.0.0.1 address.i want to know how to fix it and what caused it.
Code:
#include <stdio.h>
#include <stdafx.h>
#include <winsock2.h>
int main()
{
// Initialize Winsock
WSADATA wsaData;
int iResult = WSAStartup(MAKEWORD(2,2), &wsaData);
if (iResult != NO_ERROR)
printf("Client: Error at WSAStartup().\n");
else
printf("Client: WSAStartup() is OK.\n");
// Create a SOCKET for connecting to server
SOCKET ConnectSocket;
ConnectSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (ConnectSocket == INVALID_SOCKET)
{
printf("Client: Error at socket(): %ld.\n", WSAGetLastError());
WSACleanup();
return 0;
}
else
printf("Client: socket() is OK.\n");
// The sockaddr_in structure specifies the address family,
// IP address, and port of the server to be connected to.
sockaddr_in clientService;
clientService.sin_family = AF_INET;
clientService.sin_addr.s_addr = inet_addr("127.0.0.1");
clientService.sin_port = htons(55555);
// Connect to server.
if (connect(ConnectSocket, (SOCKADDR*)&clientService, sizeof(clientService)) == SOCKET_ERROR)
{
printf("Client: Failed to connect.\n");
WSACleanup();
return 0;
}
else
printf("Client: connect() is OK.\n");
// Declare and initialize variables.
int bytesSent;
int bytesRecv = SOCKET_ERROR;
char sendbuf[100] = "Client: Sending some data.";
char recvbuf[100] = "";
while(bytesRecv == SOCKET_ERROR )
{
bytesRecv = recv(ConnectSocket, recvbuf, 100, 0);
if (bytesRecv == 0 || bytesRecv == WSAECONNRESET)
{
printf("Client: Connection Closed.\n");
break;
}
else
{
printf("Client: recv() is OK.\n");
printf("Client: Bytes received: %ld\n", bytesRecv);
}
}
// Send and receive data.
bytesSent = send(ConnectSocket, sendbuf, strlen(sendbuf), 0);
printf("Client: Bytes sent: %ld\n", bytesSent);
WSACleanup();
getchar();
return 0;
}
