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//////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////
//
// copyright : (C) 2014 Eran Ifrah
// file name : np_connections_server.cpp
//
// -------------------------------------------------------------------------
// A
// _____ _ _ _ _
// / __ \ | | | | (_) |
// | / \/ ___ __| | ___| | _| |_ ___
// | | / _ \ / _ |/ _ \ | | | __/ _ )
// | \__/\ (_) | (_| | __/ |___| | || __/
// \____/\___/ \__,_|\___\_____/_|\__\___|
//
// F i l e
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
//////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////
#include "np_connections_server.h"
#include "named_pipe_server.h"
#ifndef __WXMSW__
# include <sys/types.h>
# include <sys/socket.h>
# include <sys/un.h>
# include <stdio.h>
#else
# include <ctype.h>
# include <sys/time.h>
# include <fcntl.h>
#endif
#ifdef __WXMSW__
class HandleLockerServer
{
HANDLE m_event;
public:
HandleLockerServer(HANDLE event) : m_event(event) {}
~HandleLockerServer() {
if(m_event != INVALID_PIPE_HANDLE)
CloseHandle(m_event);
}
};
#endif
#ifdef __WXMSW__
static PIPE_HANDLE createNamedPipe(const char* pipeName, SECURITY_ATTRIBUTES sa)
{
return CreateNamedPipeA( pipeName,
PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,
PIPE_TYPE_BYTE | PIPE_WAIT | PIPE_READMODE_BYTE,
PIPE_UNLIMITED_INSTANCES,
8192, 8192, 0,
&sa);
}
#endif
clNamedPipeConnectionsServer::clNamedPipeConnectionsServer(const char* pipeName)
: _listenHandle(INVALID_PIPE_HANDLE)
{
_pipePath = pipeName;
}
clNamedPipeConnectionsServer::~clNamedPipeConnectionsServer()
{
_pipePath.clear();
_listenHandle = INVALID_PIPE_HANDLE;
}
PIPE_HANDLE clNamedPipeConnectionsServer::initNewInstance()
{
#ifdef __WXMSW__
SECURITY_ATTRIBUTES sa = {0};
memset(&sa, 0, sizeof(sa));
sa.nLength = sizeof(sa);
sa.bInheritHandle = TRUE;
sa.lpSecurityDescriptor = NULL;
HANDLE hPipe = createNamedPipe(_pipePath.c_str(), sa);
if (!hPipe) {
this->setLastError(NP_SERVER_UNKNOWN_ERROR);
return INVALID_PIPE_HANDLE;
}
return hPipe;
#else
if (_listenHandle == INVALID_PIPE_HANDLE) {
unlink(_pipePath.c_str());
struct sockaddr_un server;
_listenHandle = socket(AF_UNIX, SOCK_STREAM, 0);
if (_listenHandle < 0) {
perror("ERROR: socket");
return INVALID_PIPE_HANDLE;
}
server.sun_family = AF_UNIX;
strcpy(server.sun_path, _pipePath.c_str());
if (bind(_listenHandle, (struct sockaddr *) &server, sizeof(struct sockaddr_un))) {
perror("ERROR: binding stream socket");
return INVALID_PIPE_HANDLE;
}
}
listen(_listenHandle, 10);
return _listenHandle;
#endif
}
bool clNamedPipeConnectionsServer::shutdown()
{
_pipePath.clear();
#ifndef __WXMSW__
close(_listenHandle);
#endif
_listenHandle = INVALID_PIPE_HANDLE;
return true;
}
clNamedPipe *clNamedPipeConnectionsServer::waitForNewConnection( int timeout )
{
PIPE_HANDLE hConn = this->initNewInstance();
#ifdef __WXMSW__
OVERLAPPED ov = {0};
HANDLE ev = CreateEvent(NULL, TRUE, TRUE, NULL);
ov.hEvent = ev;
HandleLockerServer locker(ov.hEvent);
bool fConnected = ConnectNamedPipe(hConn, &ov);
if (fConnected != 0) {
if(hConn != INVALID_PIPE_HANDLE) {
CloseHandle(hConn);
}
this->setLastError(NP_SERVER_UNKNOWN_ERROR);
return NULL;
}
switch (GetLastError()) {
// The overlapped connection in progress.
case ERROR_IO_PENDING: {
DWORD res = WaitForSingleObject(ov.hEvent, timeout) ;
switch (res) {
case WAIT_OBJECT_0 : {
clNamedPipeServer *conn = new clNamedPipeServer(_pipePath.c_str());
conn->setHandle(hConn);
return conn;
}
case WAIT_TIMEOUT : {
if ( hConn != INVALID_PIPE_HANDLE ) {
CloseHandle( hConn );
}
this->setLastError(NP_SERVER_TIMEOUT);
return NULL;
}
default: {
if ( hConn != INVALID_PIPE_HANDLE ) {
CloseHandle( hConn );
}
this->setLastError(NP_SERVER_UNKNOWN_ERROR);
return NULL;
}
}
}
case ERROR_PIPE_CONNECTED: {
clNamedPipeServer *conn = new clNamedPipeServer(_pipePath.c_str());
conn->setHandle(hConn);
return conn;
}
// If an error occurs during the connect operation...
default: {
if(hConn != INVALID_PIPE_HANDLE) {
CloseHandle(hConn);
}
this->setLastError(NP_SERVER_UNKNOWN_ERROR);
return NULL;
}
}
#else
// accept new connection
if (hConn != INVALID_PIPE_HANDLE) {
if ( timeout > 0 ) {
fd_set fds;
struct timeval tv;
memset( (void*)&fds, 0, sizeof( fds ) );
FD_SET( hConn, &fds );
tv.tv_sec = 0;
tv.tv_usec = timeout * 1000; // convert mili to micro
int rc = select(hConn + 1, &fds, 0, 0, &tv);
if ( rc == 0 || rc < 0 ) {
// timeout or error
setLastError(NP_SERVER_TIMEOUT);
return NULL;
}
}
PIPE_HANDLE fd = ::accept(hConn, 0, 0);
if (fd > 0) {
clNamedPipeServer *conn = new clNamedPipeServer(_pipePath.c_str());
conn->setHandle(fd);
return conn;
} else {
perror("ERROR: accept");
return NULL;
}
}
return NULL;
#endif
}
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