代码：
#define WIN32_LEAN_AND_MEAN
#include <WinSock2.h>
#include <WS2tcpip.h>
#include <iostream>
#include <string>
// link with Ws2_32.lib
#pragma comment(lib, "Ws2_32.lib")
#define DEFAULT_PORT "27015"
#define DEFAULT_BUFFER_LENGTH 512
class Client {
public:
Client(char* servername)
{
szServerName = servername;
ConnectSocket = INVALID_SOCKET;
}
bool Start() {
WSADATA wsaData;
// Initialize Winsock
int iResult = WSAStartup(MAKEWORD(2,2), &wsaData);
if(iResult != 0)
{
printf("WSAStartup failed: %d\n", iResult);
return false;
}
struct addrinfo *result = NULL,
*ptr = NULL,
hints;
ZeroMemory(&hints, sizeof(hints));
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
hints.ai_protocol = IPPROTO_TCP;
// Resolve the server address and port
iResult = getaddrinfo(szServerName, DEFAULT_PORT, &hints, &result);
if (iResult != 0)
{
printf("getaddrinfo failed: %d\n", iResult);
WSACleanup();
return false;
}
ptr = result;
// Create a SOCKET for connecting to server
ConnectSocket = socket(ptr->ai_family, ptr->ai_socktype, ptr->ai_protocol);
if (ConnectSocket == INVALID_SOCKET)
{
printf("Error at socket(): %d\n", WSAGetLastError());
freeaddrinfo(result);
WSACleanup();
return false;
}
// Connect to server
iResult = connect(ConnectSocket, ptr->ai_addr, (int)ptr->ai_addrlen);
if (iResult == SOCKET_ERROR)
{
closesocket(ConnectSocket);
ConnectSocket = INVALID_SOCKET;
}
freeaddrinfo(result);
if (ConnectSocket == INVALID_SOCKET)
{
printf("Unable to connect to server!\n");
WSACleanup();
return false;
}
return true;
};
// Free the resouces
void Stop() {
int iResult = shutdown(ConnectSocket, SD_SEND);
if (iResult == SOCKET_ERROR)
{
printf("shutdown failed: %d\n", WSAGetLastError());
}
closesocket(ConnectSocket);
WSACleanup();
};
// Send message to server
bool Send(char* szMsg)
{
int iResult = send(ConnectSocket, szMsg, strlen(szMsg), 0);
if (iResult == SOCKET_ERROR)
{
printf("send failed: %d\n", WSAGetLastError());
Stop();
return false;
}
return true;
};
// Receive message from server
bool Recv()
{
char recvbuf[DEFAULT_BUFFER_LENGTH];
int iResult = recv(ConnectSocket, recvbuf, DEFAULT_BUFFER_LENGTH, 0);
if (iResult > 0)
{
char msg[DEFAULT_BUFFER_LENGTH];
memset(&msg, 0, sizeof(msg));
strcpy_s(msg, recvbuf, iResult);
printf("Received: %s\n", msg);
return true;
}
return false;
}
private:
char* szServerName;
SOCKET ConnectSocket;
};
int main(int argc, CHAR* argv[])
{
std::string msg;
Client client("127.0.0.1");
if (!client.Start())
return 1;
while(true)
{
std::cout << "Send: ";
std::getline(std::cin, msg);
// Close the connection when user enter "close"
if (msg.compare("close") == 0)
{
break;
}
client.Send((char*)msg.c_str());
client.Recv();
}
client.Stop();
getchar();
return 0;
}
和
#define WIN32_LEAN_AND_MEAN
#include <WinSock2.h>
#include <WS2tcpip.h>
#include <stdio.h>
#include <stdlib.h>
// link with Ws2_32.lib
#pragma comment(lib, "Ws2_32.lib")
#define DEFAULT_PORT "27015"
#define DEFAULT_BUFFER_LENGTH 512
int main() {
WSADATA wsaData;
// Initialize Winsock
int iResult = WSAStartup(MAKEWORD(2,2), &wsaData);
if(iResult != 0)
{
printf("WSAStartup failed: %d\n", iResult);
return 1;
}
struct addrinfo *result = NULL,
hints;
ZeroMemory(&hints, sizeof(hints));
hints.ai_family = AF_INET; // Internet address family is unspecified so that either an IPv6 or IPv4 address can be returned
hints.ai_socktype = SOCK_STREAM; // Requests the socket type to be a stream socket for the TCP protocol
hints.ai_protocol = IPPROTO_TCP;
hints.ai_flags = AI_PASSIVE;
// Resolve the local address and port to be used by the server
iResult = getaddrinfo(NULL, DEFAULT_PORT, &hints, &result);
if (iResult != 0)
{
printf("getaddrinfo failed: %d\n", iResult);
WSACleanup();
return 1;
}
SOCKET ListenSocket = INVALID_SOCKET;
// Create a SOCKET for the server to listen for client connections
ListenSocket = socket(result->ai_family, result->ai_socktype, result->ai_protocol);
if (ListenSocket == INVALID_SOCKET)
{
printf("Error at socket(): %d\n", WSAGetLastError());
freeaddrinfo(result);
WSACleanup();
return 1;
}
// Setup the TCP listening socket
iResult = bind(ListenSocket, result->ai_addr, (int)result->ai_addrlen);
if (iResult == SOCKET_ERROR)
{
printf("bind failed: %d", WSAGetLastError());
freeaddrinfo(result);
closesocket(ListenSocket);
WSACleanup();
return 1;
}
freeaddrinfo(result);
// To listen on a socket
if ( listen(ListenSocket, SOMAXCONN) == SOCKET_ERROR)
{
printf("listen failed: %d\n", WSAGetLastError());
closesocket(ListenSocket);
WSACleanup();
return 1;
}
SOCKET ClientSocket;
ClientSocket = INVALID_SOCKET;
// Accept a client socket
ClientSocket = accept(ListenSocket, NULL, NULL);
if (ClientSocket == INVALID_SOCKET)
{
printf("accept failed: %d\n", WSAGetLastError());
closesocket(ListenSocket);
WSACleanup();
return 1;
}
char recvbuf[DEFAULT_BUFFER_LENGTH];
int iSendResult;
// reveice until the client shutdown the connection
do {
iResult = recv(ClientSocket, recvbuf, DEFAULT_BUFFER_LENGTH, 0);
if (iResult > 0)
{
char msg[DEFAULT_BUFFER_LENGTH];
memset(&msg, 0, sizeof(msg));
strcpy_s(msg, recvbuf, iResult);
printf("Received: %s\n", msg);
iSendResult = send(ClientSocket, recvbuf, iResult, 0);
if (iSendResult == SOCKET_ERROR)
{
printf("send failed: %d\n", WSAGetLastError());
closesocket(ClientSocket);
WSACleanup();
return 1;
}
printf("Bytes sent: %ld\n", iSendResult);
}
else if (iResult == 0)
printf("Connection closed\n");
else
{
printf("recv failed: %d\n", WSAGetLastError());
closesocket(ClientSocket);
WSACleanup();
//return 1;
}
} while (iResult > 0);
// Free the resouces
closesocket(ListenSocket);
WSACleanup();
getchar();
return 0;
}
错误：
错误C2664：'errno_t strcpy_s（char *，rsize_t，const char *）'：不能 将参数2从'char [512]'转换为'rsize_t'
错误C2664：'errno_t strcpy_s（char *，rsize_t，const char *）'：不能 将参数2从'char [512]'转换为'rsize_t'
IntelliSense：没有重载函数“strcpy_s”匹配的实例 参数列表 参数类型是：（char [512]，char [512]，int）
新代码：
#define WIN32_LEAN_AND_MEAN
#include <WinSock2.h>
#include <WS2tcpip.h>
#include <stdio.h>
#include <stdlib.h>
// link with Ws2_32.lib
#pragma comment(lib, "Ws2_32.lib")
#define DEFAULT_PORT "27015"
#define DEFAULT_BUFFER_LENGTH 128
int main() {
WSADATA wsaData;
// Initialize Winsock
int iResult = WSAStartup(MAKEWORD(2,2), &wsaData);
if(iResult != 0)
{
printf("WSAStartup failed: %d\n", iResult);
return 1;
}
struct addrinfo *result = NULL,
hints;
ZeroMemory(&hints, sizeof(hints));
hints.ai_family = AF_INET; // Internet address family is unspecified so that either an IPv6 or IPv4 address can be returned
hints.ai_socktype = SOCK_STREAM; // Requests the socket type to be a stream socket for the TCP protocol
hints.ai_protocol = IPPROTO_TCP;
hints.ai_flags = AI_PASSIVE;
// Resolve the local address and port to be used by the server
iResult = getaddrinfo(NULL, DEFAULT_PORT, &hints, &result);
if (iResult != 0)
{
printf("getaddrinfo failed: %d\n", iResult);
WSACleanup();
return 1;
}
SOCKET ListenSocket = INVALID_SOCKET;
// Create a SOCKET for the server to listen for client connections
ListenSocket = socket(result->ai_family, result->ai_socktype, result->ai_protocol);
if (ListenSocket == INVALID_SOCKET)
{
printf("Error at socket(): %d\n", WSAGetLastError());
freeaddrinfo(result);
WSACleanup();
return 1;
}
// Setup the TCP listening socket
iResult = bind(ListenSocket, result->ai_addr, (int)result->ai_addrlen);
if (iResult == SOCKET_ERROR)
{
printf("bind failed: %d", WSAGetLastError());
freeaddrinfo(result);
closesocket(ListenSocket);
WSACleanup();
return 1;
}
freeaddrinfo(result);
// To listen on a socket
if ( listen(ListenSocket, SOMAXCONN) == SOCKET_ERROR)
{
printf("listen failed: %d\n", WSAGetLastError());
closesocket(ListenSocket);
WSACleanup();
return 1;
}
SOCKET ClientSocket;
ClientSocket = INVALID_SOCKET;
// Accept a client socket
ClientSocket = accept(ListenSocket, NULL, NULL);
if (ClientSocket == INVALID_SOCKET)
{
printf("accept failed: %d\n", WSAGetLastError());
closesocket(ListenSocket);
WSACleanup();
return 1;
}
char recvbuf[DEFAULT_BUFFER_LENGTH];
int iSendResult;
// reveice until the client shutdown the connection
do {
iResult = recv(ClientSocket, recvbuf, DEFAULT_BUFFER_LENGTH, 0);
if (iResult > 0)
{
char msg[DEFAULT_BUFFER_LENGTH];
memset(&msg, 0, sizeof(msg));
strcpy_s(msg, iResult, recvbuf);
printf("Received: %s\n", msg);
iSendResult = send(ClientSocket, recvbuf, iResult, 0);
if (iSendResult == SOCKET_ERROR)
{
printf("send failed: %d\n", WSAGetLastError());
closesocket(ClientSocket);
WSACleanup();
return 1;
}
printf("Bytes sent: %ld\n", iSendResult);
}
else if (iResult == 0)
printf("Connection closed\n");
else
{
printf("recv failed: %d\n", WSAGetLastError());
closesocket(ClientSocket);
WSACleanup();
//return 1;
}
} while (iResult > 0);
// Free the resouces
closesocket(ListenSocket);
WSACleanup();
getchar();
return 0;
}
新错误：
答案 0 :(得分：3)
您的参数顺序错误。
errno_t strcpy_s(char *dest, rsize_t size, const char *src);
您将src放在size参数中，将size放在src参数中。