我是套接字编程的新手,这是我的第一个服务器客户端程序。该程序起初运行良好,但是当我将代码从Server.c和Client.c复制到Visual Studio中的新项目时,我的客户端现在拒绝连接并抛出错误10049。如果我从命令提示符使用 telnet,我仍然可以连接到我的服务器。
我很惊讶为什么当我将代码复制到另一个空项目时我的客户会停止工作,其他一切都没有改变。
我尝试使用我的公共地址更改IP地址,端口号和端口转发,但无济于事。我已经使用 ipconfig 确认了计算机的 IP,并且在我的代码中正确输入了它以及端口号。程序编译良好,没有任何错误。
服务器.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: %dn", 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: %ldn", 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: %ldn", WSAGetLastError());
}
else
{
printf("Bind was successful!n");
}
int listen_status = listen(server_sock, 3);
if (listen_status == -1)
{
wprintf(L"listen failed with error: %ldn", WSAGetLastError());
}
else
{
printf("Listening...n");
}
client_sock = accept(server_sock, NULL, NULL);
if (client_sock == -1)
{
wprintf(L"client socket failed with error: %ldn", WSAGetLastError());
}
else
{
printf("Accepted new client!n");
}
}
客户端.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: %dn", 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: %dn", 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: %dn", WSAGetLastError());
}
else
{
printf("Connected.n");
}
}
尝试使用环回地址为 127.0.0.1 的代码。如果它有效,那么肯定有问题出在IP和端口号的组合上。也许使用 ipconfig/reset 来重置您的 IP 地址。
非常快速/简单的搜索WSA error 10049
结果为:
Winsock 错误 10049 通常在尝试创建地址不在此计算机上的套接字时发生。例如,如果您在 IP 地址为 192.168.0.1 的机器上运行 MDaemon,并且您尝试将 MDaemon 绑定到 192.168.0.100,您将收到此错误消息。
因此,您需要更正新计算机的IP地址。