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/*
net/netclient.cc
This file is part of the Osirion project and is distributed under
the terms of the GNU General Public License version 2
*/
#include <string.h>
#include <zlib.h>
#include <iostream>
#include <sstream>
#include "sys/sys.h"
#include "core/net.h"
#include "core/application.h"
#include "core/stats.h"
namespace core
{
NetClient::NetClient(std::string host, int port, int fd) :
client_host(host)
{
client_error = true;
client_state = Connecting;
client_fd = fd;
client_host = host;
client_port = port;
client_player = new NetPlayer(this);
if (!fd) {
con_warn << "Network invalid client file descriptor!" << std::endl;
abort();
return;
}
con_print << host << ":" << port << " connected" << std::endl;
client_addr.sin_family = AF_INET;
client_addr.sin_port = htons(port);
client_addr.sin_addr.s_addr = inet_addr(host.c_str());
memset(client_addr.sin_zero, '\0', sizeof(client_addr.sin_zero));
if (client_addr.sin_addr.s_addr == INADDR_NONE) {
con_warn << "Network invalid client address " << host << "!" << std::endl;
abort();
return;
}
sendq.clear();
messageblock.clear();
client_keepalive = application()->time();
client_timeout = application()->time();
client_error = false;
}
NetClient::~NetClient()
{
con_print << host() << ":" << port() << " disconnected" << std::endl;
delete client_player;
}
void NetClient::abort()
{
client_error = true;
}
std::string NetClient::host() const
{
return client_host;
}
int NetClient::port() const
{
return client_port;
}
Player *NetClient::player()
{
return client_player;
}
bool NetClient::has_messages() const
{
return (recvq.size() > 0);
}
void NetClient::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 NetClient::receive(char *data)
{
const char *c = data;
while (*c) {
if ((*c == '\n') || (*c == '\r')) {
if (messageblock.size() > 0) {
recvq.push_back(messageblock);
messageblock.clear();
}
} else {
if (messageblock.size() < FRAMESIZE) {
messageblock += *c;
} else {
con_warn << "Incoming message exceeds " << FRAMESIZE << " bytes!\n";
messageblock.clear();
}
}
c++;
}
client_timeout = application()->time();
}
void NetClient::send_raw(std::string const &msg)
{
if (error())
return;
if ((sendq.size()) && (sendq.size() + msg.size() >= BLOCKSIZE - 16)) {
transmit();
}
sendq.append(msg);
}
void NetClient::transmit()
{
if (!sendq.size()) {
if (client_keepalive + NETTIMEOUT / 2 < application()->time()) {
sendq.assign("ping\n");
} else {
return;
}
} else if (sendq.size() >= BLOCKSIZE - 16) {
con_warn << host() << ":" << port() << " outgoing data exceeds " << BLOCKSIZE - 16 << " bytes!\n";
sendq.clear();
return;
}
unsigned char zbuf[BLOCKSIZE];
const char *data = 0;
uLong compressed_size = (uLong) BLOCKSIZE - 5;
uLong uncompressed_size = (uLong) sendq.size();
size_t total_size = 0;
memset(zbuf, 0, sizeof(zbuf));
Stats::network_uncompressed_bytes_sent += sendq.size();
// zlib compress
int status = compress((Bytef*)(zbuf + 4), &compressed_size, (Bytef*)sendq.c_str(), uncompressed_size);
if ((status == Z_OK) && (compressed_size + 4 < sendq.size())) {
// add a header to the compress packet
data = (char *) zbuf;
total_size = (size_t)(compressed_size + 4);
zbuf[0] = '\xff';
zbuf[1] = '\xff';
zbuf[2] = compressed_size % 256;
zbuf[3] = compressed_size >> 8;
} else {
data = sendq.c_str();
total_size = sendq.size();
}
size_t total_sent = 0;
while (total_sent < total_size && !error()) {
ssize_t bytes_sent = ::sendto(fd(), data, total_size - total_sent, 0,
(struct sockaddr *) & client_addr, sizeof(client_addr));
if (bytes_sent < 0) {
abort();
return;
}
total_sent += bytes_sent;
data += bytes_sent;
Stats::network_bytes_sent += bytes_sent;
}
sendq.clear();
client_keepalive = application()->time();
}
}
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