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/*
Copyright (C) 2012-23 Miranda NG team (https://miranda-ng.org)
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 version 2
of the License.
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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "stdafx.h"
void __cdecl CSteamProto::ServerThread(void *)
{
// load web socket servers first if needed
int iTimeDiff = db_get_dw(0, STEAM_MODULE, DBKEY_HOSTS_DATE);
int iHostCount = db_get_dw(0, STEAM_MODULE, DBKEY_HOSTS_COUNT);
if (!iHostCount || time(0) - iTimeDiff > 3600 * 24 * 7) { // once a week
if (!SendRequest(new GetHostsRequest(), &CSteamProto::OnGotHosts)) {
LoginFailed();
return;
}
}
srand(time(0));
m_hServerConn = nullptr;
CMStringA szHost;
do {
szHost.Format("Host%d", rand() % iHostCount);
szHost = db_get_sm(0, STEAM_MODULE, szHost);
szHost.Insert(0, "wss://");
szHost += "/cmsocket/";
}
while (ServerThreadStub(szHost));
}
bool CSteamProto::ServerThreadStub(const char *szHost)
{
NLHR_PTR pReply(WebSocket_Connect(m_hNetlibUser, szHost));
if (pReply == nullptr) {
debugLogA("websocket connection failed");
return false;
}
if (pReply->resultCode != 101) {
debugLogA("websocket connection failed: %d", pReply->resultCode);
return false;
}
m_hServerConn = pReply->nlc;
debugLogA("Websocket connection succeeded");
// Send init packets
Login();
bool bExit = false;
int offset = 0;
MBinBuffer netbuf;
while (!bExit) {
if (m_bTerminated)
break;
unsigned char buf[2048];
int bufSize = Netlib_Recv(m_hServerConn, (char *)buf + offset, _countof(buf) - offset, 0);
if (bufSize == 0) {
debugLogA("Gateway connection gracefully closed");
bExit = !m_bTerminated;
break;
}
if (bufSize < 0) {
debugLogA("Gateway connection error, exiting");
break;
}
WSHeader hdr;
if (!WebSocket_InitHeader(hdr, buf, bufSize)) {
offset += bufSize;
continue;
}
offset = 0;
debugLogA("Got packet: buffer = %d, opcode = %d, headerSize = %d, final = %d, masked = %d", bufSize, hdr.opCode, hdr.headerSize, hdr.bIsFinal, hdr.bIsMasked);
// we have some additional data, not only opcode
if ((size_t)bufSize > hdr.headerSize) {
size_t currPacketSize = bufSize - hdr.headerSize;
netbuf.append(buf, bufSize);
while (currPacketSize < hdr.payloadSize) {
int result = Netlib_Recv(m_hServerConn, (char *)buf, _countof(buf), 0);
if (result == 0) {
debugLogA("Gateway connection gracefully closed");
bExit = !m_bTerminated;
break;
}
if (result < 0) {
debugLogA("Gateway connection error, exiting");
break;
}
currPacketSize += result;
netbuf.append(buf, result);
}
}
// read all payloads from the current buffer, one by one
size_t prevSize = 0;
while (true) {
switch (hdr.opCode) {
case 0: // text packet
case 1: // binary packet
case 2: // continuation
if (hdr.bIsFinal) {
// process a packet here
CMStringA szJson((char *)netbuf.data() + hdr.headerSize, (int)hdr.payloadSize);
debugLogA("JSON received:\n%s", szJson.c_str());
JSONNode root = JSONNode::parse(szJson);
// if (root)
// bExit = ProcessMessage(root);
}
break;
case 8: // close
debugLogA("server required to exit");
bExit = true; // simply reconnect, don't exit
break;
case 9: // ping
debugLogA("ping received");
Netlib_Send(m_hServerConn, (char *)buf + hdr.headerSize, bufSize - int(hdr.headerSize), 0);
break;
}
if (hdr.bIsFinal)
netbuf.remove(hdr.headerSize + hdr.payloadSize);
if (netbuf.length() == 0)
break;
// if we have not enough data for header, continue reading
if (!WebSocket_InitHeader(hdr, netbuf.data(), netbuf.length()))
break;
// if we have not enough data for data, continue reading
if (hdr.headerSize + hdr.payloadSize > netbuf.length())
break;
debugLogA("Got inner packet: buffer = %d, opcode = %d, headerSize = %d, payloadSize = %d, final = %d, masked = %d", netbuf.length(), hdr.opCode, hdr.headerSize, hdr.payloadSize, hdr.bIsFinal, hdr.bIsMasked);
if (prevSize == netbuf.length()) {
netbuf.remove(prevSize);
debugLogA("dropping current packet, exiting");
break;
}
prevSize = netbuf.length();
}
}
Netlib_CloseHandle(m_hServerConn);
m_hServerConn = nullptr;
return bExit;
}
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