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/*
net/netconnection.cc
This file is part of the Osirion project and is distributed under
the terms of the GNU General Public License version 2
*/
#include <sstream>
#include "sys/sys.h"
#include "core/application.h"
#include "core/gameconnection.h"
#include "core/netconnection.h"
#include "core/player.h"
namespace core
{
NetConnection::NetConnection()
{
connection_timeout = core::application()->time();
connection_state = Connecting;
}
NetConnection::~NetConnection()
{
disconnect();
}
void NetConnection::abort()
{
connection_error= true;
}
void NetConnection::connect(std::string const &to_host, int to_port)
{
connection_error = false;
connection_fd = -1;
connection_state = Connecting;
if (valid())
return;
// resolve serverhostname
struct hostent *serverhostent;
serverhostent = gethostbyname(to_host.c_str());
if (!serverhostent) {
con_warn << "Could not resolve '" << to_host.c_str() << "'" << std::endl;
abort();
return;
}
// Get a socket file descriptor
connection_fd = socket(PF_INET, SOCK_DGRAM, 0);
if (connection_fd == -1) {
//con_error << "Network socket() failed!" << std::endl;
abort();
return;
}
// make the connection
server_addr.sin_family = AF_INET;
server_addr.sin_port = htons(to_port);
// FIXME inet_addr can still fail
server_addr.sin_addr.s_addr = inet_addr(inet_ntoa(*((struct in_addr *)serverhostent->h_addr)));
memset(server_addr.sin_zero, '\0', sizeof server_addr.sin_zero);
if (server_addr.sin_addr.s_addr == INADDR_NONE) {
con_error << "Network invalid address " << to_host << "!" << std::endl;
abort();
return;
}
connection_host = to_host;
connection_port = to_port;
connection_error = false;
FD_ZERO(&clientset);
#ifdef _WIN32
FD_SET((unsigned int) fd(), &clientset);
#else
FD_SET(fd(), &clientset);
#endif
connection_timeout = application()->time();
connection_keepalive = application()->time();
game()->localplayer()->player_dirty = true;
con_print << "Connecting to " << inet_ntoa(*((struct in_addr *)serverhostent->h_addr)) << ":" << to_port << "..." << std::endl;
}
void NetConnection::disconnect()
{
if (connection_fd != -1) {
sendq.clear();
sendq.assign("disconnect\n");
transmit();
FD_ZERO(&clientset);
#ifdef _WIN32
closesocket(connection_fd);
#else
close(connection_fd);
#endif
}
connection_fd = -1;
connection_error = false;
connection_host.clear();
connection_port = 0;
connection_state = Connecting;
}
bool NetConnection::has_messages() const
{
return (recvq.size() > 0);
}
void NetConnection::retreive(std::string & message)
{
if (recvq.size() > 0) {
message.assign(recvq.front());
recvq.pop_front();
} else {
message.clear();
}
}
// receive data and decode it into lines
void NetConnection::receive()
{
// TODO: binary mode data transfer
if (error() || invalid())
return;
ssize_t bytes_received;
memset(recvbuf, '\0', BLOCKSIZE);
bytes_received = ::recv(connection_fd, recvbuf, BLOCKSIZE-1, 0);
connection_timeout = core::application()->time();
if (bytes_received == 0) {
con_print << "Disconnected.";
abort();
return;
} else if (bytes_received < 0) {
con_error << "Network receive() error!" << std::endl;
//perror("recv");
abort();
return;
}
std::string datablock;
datablock.assign(recvbuf);
while (datablock.size()) {
// scan the datablock for enters
if (datablock[0] == '\n' || datablock[0] == '\r') {
if (messageblock.size() >= FRAMESIZE) {
con_warn << "Incoming message exceeds " << FRAMESIZE << " bytes!\n";
messageblock.clear();
} else if (messageblock.size()) {
recvq.push_back(messageblock);
//con_debug << "Incoming message '" << messageblock << "'" << std::endl;
messageblock.clear();
}
} else {
messageblock.append(datablock.substr(0,1));
}
datablock.erase(0,1);
}
datablock.clear();
}
void NetConnection::frame(float seconds)
{
timeval timeout;
timeout.tv_sec = 0;
timeout.tv_usec = 0;
fd_set readset = clientset;
int nb = select(fd()+1, &readset, NULL, NULL, &timeout);
if (nb == 0) {
if (connection_timeout + NETTIMEOUT < core::application()->time()) {
con_error << "Connection timeout!\n";
abort();
}
return;
}
if (nb == -1) {
con_error << "Network error on select()" << std::endl;
//perror("select");
abort();
}
while (FD_ISSET(this->fd(), &readset) && !error()) {
receive();
while (has_messages()) {
std::string message;
retreive(message);
parse_incoming_message(message);
}
nb = select(fd()+1, &readset, NULL, NULL, &timeout);
if (nb == 0) {
return;
}
if (nb == -1) {
con_error << "Network error on select()" << std::endl;
//perror("select");
abort();
}
}
}
void NetConnection::send(std::string const &msg)
{
sendq.append(msg);
}
void NetConnection::transmit()
{
if (error() || invalid())
return;
if (!sendq.size()) {
if (connection_keepalive + NETTIMEOUT /2 < application()->time()) {
sendq.assign("ping\n");
} else {
return;
}
} else if (sendq.size() > FRAMESIZE) {
con_warn << "Outgoing message exceeds " << FRAMESIZE << " bytes!\n";
//sendq.clear();
//return;
}
ssize_t bytes_sent = 0;
while (sendq.size()) {
bytes_sent = ::sendto(connection_fd, sendq.c_str(), sendq.size(), 0, (struct sockaddr *)&server_addr, sizeof(server_addr));
if (bytes_sent <= 0) {
con_error << "Network send() error!" << std::endl;
//perror("send");
abort();
return;
}
// assert (bytes_sent <= sendbuf.size());
sendq.erase(0, bytes_sent);
}
connection_keepalive = application()->time();
}
// parse incoming client messages
/**
* The following incoming messages are parsed;
*
* connect
* disconnect
* msg info <text>
* msg public <name> <text>
* die
* ent
* sup
* pif
*/
void NetConnection::parse_incoming_message(const std::string & message)
{
std::istringstream msgstream(message);
std::string command;
msgstream >> command;
if (command == "msg") {
std::string level;
if (msgstream >> level) {
if (level =="info") {
if (message.size() > 9) {
con_print << message.substr(9) << std::endl;
}
} else if (level == "public") {
// FIXME - separate sender nickname
if (message.size() > 11) {
con_print << message.substr(11) << std::endl;
}
}
}
} else if (command == "connect") {
connection_state = Connected;
con_print << "Connected." << std::endl;
return;
} else if (command == "disconnect") {
con_error << "Server disconnected!" << std::endl;
abort();
} else if (command == "ping") {
} else if (command == "die") {
unsigned int id;
if (msgstream >> id) {
//con_debug << "Received die entity id " << id << std::endl;
Entity *e = Entity::find(id);
if (localcontrol() == e)
localplayer()->player_control = 0;
if (e)
Entity::remove(id);
}
} else if (command == "ent") {
unsigned int type;
if (msgstream >> type) {
//con_debug << "Received create entity type " << type << std::endl;
switch (type)
{
case Entity::Default:
new Entity(msgstream);
break;
case Entity::Dynamic:
new EntityDynamic(msgstream);
break;
case Entity::Controlable:
new EntityControlable(msgstream);
break;
case Entity::Globe:
new EntityGlobe(msgstream);
break;
default:
con_warn << "Create for unknown entity type " << type << std::endl;
break;
}
}
} else if (command == "sup") {
unsigned int id;
if (msgstream >> id) {
//con_debug << "Received update entity id " << id << std::endl;
Entity *entity = Entity::find(id);
if (!entity) {
con_warn << "Update for unknown entity " << id << std::endl;
} else
entity->recieve_server_update(msgstream);
}
} else if (command == "pif") {
//con_debug << "Received update player info" << std::endl;
connection()->localplayer()->recieve_server_update(msgstream);
}
}
}
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