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//-----------------------------------------------------------------------------
// Name: asnetwork.cpp
// Developer: Wolfire Games LLC
// Description:
// License: Read below
//-----------------------------------------------------------------------------
//
// Copyright 2022 Wolfire Games LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
//-----------------------------------------------------------------------------
#include "asnetwork.h"
#include <Logging/logdata.h>
#include <SDL_net.h>
#include <algorithm>
const int ASNetwork::MAX_SOCKETS = 16;
void ASNetwork::Initialize() {
socketset = SDLNet_AllocSocketSet(MAX_SOCKETS);
socket_id_counter = 1;
}
void ASNetwork::Dispose() {
SDLNet_FreeSocketSet(socketset);
}
void ASNetwork::Update() {
if( sockets.size() > 0 ) {
int check_counter = SocketData::BUF_SIZE;
while( check_counter > 0 ) {
int nr_sockets = SDLNet_CheckSockets(socketset,0);
if( nr_sockets > 0 ) {
std::map<SocketID, SocketData>::iterator socketit = sockets.begin();
for(; socketit != sockets.end(); socketit++ ) {
SocketData &sd = socketit->second;
if( SDLNet_SocketReady( sd.socket ) && sd.used < SocketData::BUF_SIZE ) {
int recv_size = SDLNet_TCP_Recv(sd.socket, sd.buf + sd.used, 1);
if( recv_size == 1 ) {
sd.used++;
} else if( recv_size <= 0 ) {
sd.valid = false;
LOGE << "Connection Recv error on " << socketit->first << " : " << SDLNet_GetError() << std::endl;
}
}
}
check_counter--;
} else if( nr_sockets == -1 ) {
LOGE << "Error using select() on socket" << std::endl;
check_counter = 0;
} else {
check_counter = 0;
}
}
//Offset the calls to allow calls to DestroyTCPSocket.
int id_count = 0;
uint8_t* data[MAX_SOCKETS];
size_t size[MAX_SOCKETS];
SocketID id[MAX_SOCKETS];
std::map<SocketID, SocketData>::iterator socketit = sockets.begin();
for(; socketit != sockets.end(); socketit++ ) {
SocketData &sd = socketit->second;
if( sd.used > 0 ) {
data[id_count] = sd.buf;
size[id_count] = sd.used;
id[id_count] = socketit->first;
id_count++;
} else if( sd.valid == false ) { //Note that we use NULL on data as a destroy marker.
data[id_count] = NULL;
size[id_count] = 0;
id[id_count] = socketit->first;
id_count++;
}
sd.used = 0;
}
for( int i = 0; i < id_count; i++ ) {
if( data[i] == NULL ) {
DestroySocketTCP(id[i]);
} else {
std::vector<ASNetworkCallback*>::iterator cbit = callbacks.begin();
for(; cbit != callbacks.end(); cbit++ ) {
(*cbit)->IncomingTCPData(id[i], data[i], size[i] );
}
}
}
}
}
SocketID ASNetwork::CreateSocketTCP(std::string host, uint16_t port) {
if( sockets.size() < (unsigned)MAX_SOCKETS ) {
IPaddress adr;
int ret = SDLNet_ResolveHost(&adr, host.c_str(), port);
if( ret == 0 ) {
TCPsocket tcp_socket;
tcp_socket = SDLNet_TCP_Open(&adr);
if( tcp_socket ) {
SDLNet_AddSocket( socketset, (SDLNet_GenericSocket)tcp_socket );
SocketData sd;
sd.used = 0;
sd.socket = tcp_socket;
sd.valid = true;
SocketID socket_id = socket_id_counter++;
sockets[socket_id] = sd;
return socket_id;
}
else
{
LOGE << "Unable to open socket to resolved address: " << host << ":" << port << std::endl;
LOGE << "Error: " << SDLNet_GetError() << std::endl;
}
}
else
{
LOGE << "Unable to resolve host " << host << ":" << port << std::endl;
}
}
else
{
LOGE << "Unable to create another socket connection, reached max of: " << MAX_SOCKETS << std::endl;
}
return SOCKET_ID_INVALID;
}
void ASNetwork::DestroySocketTCP(SocketID sock) {
std::map<SocketID, SocketData>::iterator datait = sockets.find(sock);
if( datait != sockets.end() ) {
SDLNet_DelSocket(socketset, (SDLNet_GenericSocket)datait->second.socket);
SDLNet_TCP_Close(datait->second.socket);
sockets.erase(datait);
}
}
int ASNetwork::SocketTCPSend(SocketID socket, const uint8_t* buf, size_t len) {
std::map<SocketID, SocketData>::iterator datait = sockets.find(socket);
if( datait != sockets.end() ) {
SocketData &sd = datait->second;
int ret_data_size = SDLNet_TCP_Send( sd.socket, buf, len );
if( ret_data_size < (int)len ) {
sd.valid = false;
DestroySocketTCP(socket);
LOGE << "Error when trying to send data on socket, error: \"" << SDLNet_GetError() << "\", shutting it down." << std::endl;
}
return ret_data_size;
} else {
LOGE << "unable to send data, no such socket " << socket << std::endl;
return -1;
}
}
bool ASNetwork::IsValidSocketTCP(SocketID socket) {
std::map<SocketID, SocketData>::iterator datait = sockets.find(socket);
if( datait != sockets.end() ) {
return true;
} else {
return false;
}
}
void ASNetwork::RegisterASNetworkCallback( ASNetworkCallback* cb ) {
callbacks.push_back(cb);
}
void ASNetwork::DeRegisterASNetworkCallback( ASNetworkCallback* cb ) {
std::vector<ASNetworkCallback*>::iterator callit = std::find(callbacks.begin(), callbacks.end(),cb);
if( callit != callbacks.end() ) {
callbacks.erase(callit);
}
}
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