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/*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Library General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* OPCServer.cpp
* The Open Pixel Server.
* Copyright (C) 2014 Simon Newton
*/
#include "plugins/openpixelcontrol/OPCServer.h"
#include <string>
#include "ola/Callback.h"
#include "ola/Logging.h"
#include "ola/base/Array.h"
#include "ola/network/SocketAddress.h"
#include "ola/stl/STLUtils.h"
#include "ola/util/Utils.h"
namespace ola {
namespace plugin {
namespace openpixelcontrol {
using ola::network::GenericSocketAddress;
using ola::network::IPV4SocketAddress;
using ola::network::TCPAcceptingSocket;
using ola::network::TCPSocket;
using std::string;
namespace {
void CleanupSocket(TCPSocket *socket) {
delete socket;
}
} // namespace
void OPCServer::RxState::CheckSize() {
expected_size = utils::JoinUInt8(data[2], data[3]);
if (static_cast<unsigned int>(expected_size) + OPC_HEADER_SIZE >
buffer_size) {
uint8_t *new_buffer = new uint8_t[expected_size + OPC_HEADER_SIZE];
memcpy(new_buffer, data, offset);
delete[] data;
data = new_buffer;
buffer_size = expected_size + OPC_HEADER_SIZE;
}
}
OPCServer::OPCServer(ola::io::SelectServerInterface *ss,
const ola::network::IPV4SocketAddress &listen_addr)
: m_ss(ss),
m_listen_addr(listen_addr),
m_tcp_socket_factory(
ola::NewCallback(this, &OPCServer::NewTCPConnection)) {
}
OPCServer::~OPCServer() {
if (m_listening_socket.get()) {
m_ss->RemoveReadDescriptor(m_listening_socket.get());
m_listening_socket.reset();
}
ClientMap::iterator iter = m_clients.begin();
for (; iter != m_clients.end(); ++iter) {
m_ss->RemoveReadDescriptor(iter->first);
delete iter->first;
delete iter->second;
}
STLDeleteValues(&m_callbacks);
}
bool OPCServer::Init() {
std::auto_ptr<TCPAcceptingSocket> listening_socket(
new TCPAcceptingSocket(&m_tcp_socket_factory));
if (!listening_socket->Listen(m_listen_addr)) {
return false;
}
m_ss->AddReadDescriptor(listening_socket.get());
m_listening_socket.reset(listening_socket.release());
return true;
}
IPV4SocketAddress OPCServer::ListenAddress() const {
if (m_listening_socket.get()) {
GenericSocketAddress addr = m_listening_socket->GetLocalAddress();
if (addr.Family() == AF_INET) {
return addr.V4Addr();
}
}
return IPV4SocketAddress();
}
void OPCServer::SetCallback(uint8_t channel, ChannelCallback *callback) {
STLReplaceAndDelete(&m_callbacks, channel, callback);
}
void OPCServer::NewTCPConnection(TCPSocket *socket) {
if (!socket)
return;
RxState *rx_state = new RxState();
socket->SetNoDelay();
socket->SetOnData(
NewCallback(this, &OPCServer::SocketReady, socket, rx_state));
socket->SetOnClose(
NewSingleCallback(this, &OPCServer::SocketClosed, socket));
m_ss->AddReadDescriptor(socket);
STLReplaceAndDelete(&m_clients, socket, rx_state);
}
void OPCServer::SocketReady(TCPSocket *socket, RxState *rx_state) {
unsigned int data_received = 0;
if (socket->Receive(rx_state->data + rx_state->offset,
rx_state->buffer_size - rx_state->offset,
data_received) < 0) {
OLA_WARN << "Bad read from " << socket->GetPeerAddress();
SocketClosed(socket);
return;
}
rx_state->offset += data_received;
if (rx_state->offset < OPC_HEADER_SIZE) {
return;
}
rx_state->CheckSize();
if (rx_state->offset <
static_cast<unsigned int>(rx_state->expected_size) + OPC_HEADER_SIZE) {
return;
}
ChannelCallback *cb = STLFindOrNull(m_callbacks, rx_state->data[0]);
if (cb) {
DmxBuffer buffer(rx_state->data + OPC_HEADER_SIZE,
rx_state->offset - OPC_HEADER_SIZE);
cb->Run(rx_state->data[1],
rx_state->data + OPC_HEADER_SIZE,
rx_state->expected_size);
}
rx_state->offset = 0;
rx_state->expected_size = 0;
}
void OPCServer::SocketClosed(TCPSocket *socket) {
m_ss->RemoveReadDescriptor(socket);
STLRemoveAndDelete(&m_clients, socket);
// Since we're in the call stack of the socket, we schedule deletion during
// the next run of the event loop to break out of the stack.
m_ss->Execute(NewSingleCallback(&CleanupSocket, socket));
}
} // namespace openpixelcontrol
} // namespace plugin
} // namespace ola
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