我尝试在C ++中使用命名管道将消息从一台计算机传输到另一台计算机。但是客户端无法连接到服务器,尽管正确指定了服务器名称,但它返回错误1326(无效的名称或密码)。
密码与频道有什么关系?如果代码中没有错误,那么还有什么原因会导致与通道的连接错误?
此外,在Internet上,我看到了这样一个记录频道名称\\servername\pipe\[path] pipename
的表格。 servername
是服务器的名称,pipe
确定它是一个通道,而pipename
是该通道的名称,但是[path]
是什么?
服务器
#include <windows.h>
#include <iostream>
#include <cstring>
using namespace std;
int main()
{
HANDLE hNamedPipe;
DWORD dwBytesRead;
DWORD dwBytesWrite;
char pchMessage[80];
int nMessageLength;
PSECURITY_DESCRIPTOR psd;
SECURITY_ATTRIBUTES sa;
psd = (PSECURITY_DESCRIPTOR)LocalAlloc(LPTR, SECURITY_DESCRIPTOR_MIN_LENGTH);
InitializeSecurityDescriptor(psd, SECURITY_DESCRIPTOR_REVISION);
SetSecurityDescriptorDacl(psd, true, NULL, false);
sa.nLength = sizeof(sa);
sa.bInheritHandle = true;
sa.lpSecurityDescriptor = psd;
hNamedPipe= CreateNamedPipe("\\\\.\\pipe\\pipe", PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED | WRITE_OWNER, PIPE_READMODE_MESSAGE | PIPE_TYPE_MESSAGE| PIPE_ACCEPT_REMOTE_CLIENTS, PIPE_UNLIMITED_INSTANCES, 2048, 2048, INFINITE, &sa);
if (hNamedPipe == INVALID_HANDLE_VALUE)
{
cerr << "Create named pipe failed." << endl
<< "The last error code: " << GetLastError() << endl;
cout << "Press any key to exit.";
cin.get();
return 0;
}
cout << "The server is waiting for connection with a client." << endl;
if (!ConnectNamedPipe(
hNamedPipe,
NULL
))
{
cerr << "Connect named pipe failed." << endl
<< "The last error code: " << GetLastError() << endl;
CloseHandle(hNamedPipe);
cout << "Press any key to exit.";
cin.get();
return 0;
}
if (!ReadFile(
hNamedPipe,
pchMessage,
sizeof(pchMessage),
&dwBytesRead,
NULL))
{
cerr << "Data reading from the named pipe failed." << endl
<< "The last error code: " << GetLastError() << endl;
CloseHandle(hNamedPipe);
cout << "Press any key to exit.";
cin.get();
return 0;
}
cout << "The server received the message from a client: "
<< endl << '\t' << pchMessage << endl;
cout << "Input a string: ";
cin.getline(pchMessage, 80);
nMessageLength = strlen(pchMessage) + 1;
if (!WriteFile(
hNamedPipe,
pchMessage,
nMessageLength,
&dwBytesWrite,
NULL
))
{
cerr << "Write file failed." << endl
<< "The last error code: " << GetLastError() << endl;
CloseHandle(hNamedPipe);
cout << "Press any key to exit.";
cin.get();
return 0;
}
cout << "The server sent the message to a client: "
<< endl << '\t' << pchMessage << endl;
CloseHandle(hNamedPipe);
cout << "Press any key to exit.";
cin.get();
return 0;
}
客户
#include <windows.h>
#include <iostream>
#include <string>
using namespace std;
int main()
{
string machineName;
getline(cin, machineName, '\n');
machineName= "\\\\"+machineName+"\\pipe\\pipe";
cout << machineName << endl;
char pipeName[80];
strcpy_s(pipeName, machineName.c_str());
HANDLE hNamedPipe;
DWORD dwBytesWritten;
DWORD dwBytesRead;
char pchMessage[80];
int nMessageLength;
hNamedPipe = CreateFile(
pipeName, // имя канала
GENERIC_READ | GENERIC_WRITE,
FILE_SHARE_READ | FILE_SHARE_WRITE,
NULL,
OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL,
NULL);
if (hNamedPipe == INVALID_HANDLE_VALUE)
{
cerr << "Connection with the named pipe failed." << endl
<< "The last error code: " << GetLastError() << endl;
cout << "Press any key to exit.";
cin.get();
return 0;
}
cin.get();
cout << "Input a string: ";
cin.getline(pchMessage, 80);
nMessageLength = strlen(pchMessage) + 1;
if (!WriteFile(
hNamedPipe,
pchMessage,
nMessageLength,
&dwBytesWritten,
NULL))
{
cerr << "Write file failed: " << endl
<< "The last error code: " << GetLastError() << endl;
CloseHandle(hNamedPipe);
cout << "Press any key to exit.";
cin.get();
return 0;
}
cout << "The client sent the message to a server: "
<< endl << '\t' << pchMessage << endl;
if (!ReadFile(
hNamedPipe,
pchMessage,
sizeof(pchMessage),
&dwBytesRead,
NULL))
{
cerr << "Read file failed: " << endl
<< "The last error code: " << GetLastError() << endl;
CloseHandle(hNamedPipe);
cout << "Press any key to exit.";
cin.get();
return 0;
}
cout << "The client received the message from a server: "
<< endl << '\t' << pchMessage << endl;
CloseHandle(hNamedPipe);
cout << "Press any key to exit.";
cin.get();
return 0;
}
答案 0 :(得分:0)
经过我的测试,您的代码中有两个地方需要更正。
&sa
替换NULL
,原因是雷米指出。NetUseAdd函数在本地之间建立连接 计算机和远程服务器。您可以指定本地驱动器号或 要连接的打印机设备。如果不指定本地驱动器 信件或打印机设备,该功能通过 服务器以供将来连接。
此外,file and print sharing
需要打开。
引用:SMB named pipe with no connection restrictions
配置完所有内容后,代码即可正常工作。