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mipt_2024_win_shell_server
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feat: Рабочая версия клиента

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master
Nihonium 1 week ago
parent 9d71f33432
commit 53cc2a08ce
4 changed files with 74 additions and 65 deletions
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2
CMakeLists.txt
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@ -12,7 +12,7 @@ endif()
project ("shell-server")
# Добавьте источник в исполняемый файл этого проекта.
add_executable (shell-server "main.c" "server.c" "server.h")
add_executable (shell-server "main.c" "server.c" "server.h" "client.c" "client.h")
if (CMAKE_VERSION VERSION_GREATER 3.12)
set_property(TARGET shell-server PROPERTY CXX_STANDARD 20)

17
main.c
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@ -3,14 +3,9 @@
#include "server.h"
int _tmain(int argc, TCHAR *argv[]) {
int _tmain(int argc, char *argv[]) {
if (argc == 2) {
// TODO: implement client
if (lstrcmpi(argv[1], TEXT("-c")) == 0) {
// StartShellClient();
return 0;
}
else if (lstrcmpi(argv[1], TEXT("-s")) == 0) {
if (lstrcmpi(argv[1], TEXT("-s")) == 0) {
StartShellServer();
return 0;
}
@ -20,8 +15,12 @@ int _tmain(int argc, TCHAR *argv[]) {
}
else if (argc == 3) {
if (lstrcmpi(argv[1], TEXT("-c")) == 0) {
StartShellClient(argv[2]);
return 0;
}
// TODO: implement service
if (lstrcmpi(argv[1], TEXT("-s")) == 0 && lstrcmpi(argv[2], TEXT("-service")) == 0) {
else if (lstrcmpi(argv[1], TEXT("-s")) == 0 && lstrcmpi(argv[2], TEXT("-service")) == 0) {
// CreateService
return 0;
}
@ -35,7 +34,7 @@ int _tmain(int argc, TCHAR *argv[]) {
return 0;
help_message:
printf("Wrong usage\nUsage: %s [-c | -s [-service]]\n", argv[0]);
printf("Wrong usage\nUsage: %s [-c {remote ip} | -s [-service]]\n", argv[0]);
return -1;
}

104
server.c
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@ -1,7 +1,6 @@
#include "server.h"
#define BUFSIZE 4096
#define DEFAULT_PORT "50113"
#define DEFAULT_BUFLEN 512
typedef struct PipeThreadInfo_t {
@ -10,6 +9,7 @@ typedef struct PipeThreadInfo_t {
} PipeThreadInfo;
void CreateChildProcess(HANDLE g_hChildStd_IN_Rd, HANDLE g_hChildStd_OUT_Wr);
DWORD WINAPI WorkWithClient(LPVOID lpParam);
DWORD WINAPI WriteToPipe(LPVOID lpParam);
DWORD WINAPI ReadFromPipe(LPVOID lpParam);
void ErrorExit(PCTSTR);
@ -17,26 +17,12 @@ void ErrorExit(PCTSTR);
void StartShellServer() {
printf("\n->Start of shell server execution.\n");
/*
* Server variables
*/
WSADATA wsaData;
struct addrinfo* result = NULL, * ptr = NULL, hints;
SOCKET ListenSocket = INVALID_SOCKET;
int iResult;
/*
* Client variables
*/
SOCKET ClientSocket = INVALID_SOCKET;
// Pipe handles for child STDIN/STDOUT
HANDLE g_hChildStd_IN_Rd = NULL;
HANDLE g_hChildStd_IN_Wr = NULL;
HANDLE g_hChildStd_OUT_Rd = NULL;
HANDLE g_hChildStd_OUT_Wr = NULL;
SECURITY_ATTRIBUTES saAttr;
HANDLE PipeThreads[2];
SOCKET ListenSocket = INVALID_SOCKET;
/*
* Initialize listening socket
@ -94,6 +80,46 @@ void StartShellServer() {
return 1;
}
/*
* Process client connection
*/
for (;;) {
// Accepting a client connection
ClientSocket = INVALID_SOCKET;
ClientSocket = accept(ListenSocket, NULL, NULL);
if (ClientSocket == INVALID_SOCKET) {
printf("accept failed: %d\n", WSAGetLastError());
break;
}
printf("Client connected\n");
// Create separate thread to process client connection
CreateThread(NULL, 0, WorkWithClient, ClientSocket, 0, NULL);
}
/*
* Finalization
*/
// TODO: properly close all handles
closesocket(ListenSocket);
WSACleanup();
}
DWORD WINAPI WorkWithClient(LPVOID lpParam) {
/*
* Client variables
*/
// Pipe handles for child STDIN/STDOUT
HANDLE g_hChildStd_IN_Rd = NULL;
HANDLE g_hChildStd_IN_Wr = NULL;
HANDLE g_hChildStd_OUT_Rd = NULL;
HANDLE g_hChildStd_OUT_Wr = NULL;
SECURITY_ATTRIBUTES saAttr;
HANDLE PipeThreads[2];
SOCKET ClientSocket = (SOCKET)lpParam;
/*
* Initialize pipes
*/
@ -119,26 +145,11 @@ void StartShellServer() {
ErrorExit(TEXT("Stdin SetHandleInformation"));
/*
* Create child process
* Create child process cmd.exe
*/
CreateChildProcess(g_hChildStd_IN_Rd, g_hChildStd_OUT_Wr);
/*
* Process client connection
*/
// Accepting a connection
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;
}
// Create threads for STDIN/STDOUT
PipeThreadInfo WriteThreadInfo = { g_hChildStd_IN_Wr, ClientSocket };
PipeThreadInfo ReadThreadInfo = { g_hChildStd_OUT_Rd, ClientSocket };
PipeThreads[0] = CreateThread(NULL, 0, WriteToPipe, &WriteThreadInfo, 0, NULL);
@ -147,12 +158,6 @@ void StartShellServer() {
WaitForMultipleObjects(2, PipeThreads, TRUE, INFINITE);
printf("\n->Client disconnected.\n");
/*
* Finalization
*/
// TODO: properly close all handles
closesocket(ListenSocket);
}
void CreateChildProcess(HANDLE g_hChildStd_IN_Rd, HANDLE g_hChildStd_OUT_Wr)
@ -223,12 +228,18 @@ DWORD WINAPI WriteToPipe(LPVOID lpParam)
int iResult, iSendResult;
int recvbuflen = DEFAULT_BUFLEN;
// Change codepage to UTF-8
//CHAR chcpCommand[] = "chcp 65001\n";
//bSuccess = WriteFile(g_hChildStd_IN_Wr, chcpCommand, strlen(chcpCommand), &dwWritten, NULL);
//if (!bSuccess) goto WriteToPipe_end;
do
{
iResult = recv(ClientSocket, recvbuf, recvbuflen, 0);
if (iResult > 0) {
bSuccess = WriteFile(g_hChildStd_IN_Wr, recvbuf, iResult, &dwWritten, NULL);
if (!bSuccess) break;
printf("Received command: %s\n");
}
else if (iResult == 0)
printf("Connection closing...\n");
@ -240,6 +251,7 @@ DWORD WINAPI WriteToPipe(LPVOID lpParam)
}
} while (iResult > 0);
WriteToPipe_end:
// Closing STDIN => cmd.exe exit
if (!CloseHandle(g_hChildStd_IN_Wr))
ErrorExit(TEXT("StdInWr CloseHandle"));
@ -247,19 +259,24 @@ DWORD WINAPI WriteToPipe(LPVOID lpParam)
DWORD WINAPI ReadFromPipe(LPVOID lpParam)
{
DWORD dwRead, dwWritten;
CHAR chBuf[BUFSIZE];
DWORD dwRead;
CHAR chBuf[BUFSIZE + 1];
BOOL bSuccess = FALSE;
HANDLE hParentStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
//HANDLE hParentStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
SOCKET ClientSocket = ((PipeThreadInfo*)lpParam)->ClientSocket;
HANDLE g_hChildStd_OUT_Rd = ((PipeThreadInfo*)lpParam)->Pipe;
int iSendResult;
for (;;)
{
bSuccess = ReadFile(g_hChildStd_OUT_Rd, chBuf, BUFSIZE, &dwRead, NULL);
if (!bSuccess || dwRead == 0) break;
printf("STDOUT: %s\n", chBuf);
chBuf[dwRead] = '\0';
iSendResult = send(ClientSocket, chBuf, dwRead, 0);
if (iSendResult == SOCKET_ERROR) {
@ -268,9 +285,6 @@ DWORD WINAPI ReadFromPipe(LPVOID lpParam)
WSACleanup();
return 1;
}
// Write to console
bSuccess = WriteFile(hParentStdOut, chBuf,
dwRead, &dwWritten, NULL);
if (!bSuccess) break;
}
}

8
server.h
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@ -12,11 +12,7 @@
#include <winsock2.h>
#include <ws2tcpip.h>
#define DEFAULT_PORT "50113"
// Defined functions
void StartShellServer();
//void CreatePipes();
//void CreateChildProcess(void);
//DWORD WINAPI WriteToPipe(LPVOID lpParam);
//DWORD WINAPI ReadFromPipe(LPVOID lpParam);
//void ErrorExit(PCTSTR);
//void CreateSocket();
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