1 files changed, 325 insertions, 0 deletions
diff --git a/protocols/Steam/src/steam_ws.cpp b/protocols/Steam/src/steam_ws.cpp
new file mode 100644
index 0000000000..e7c98357d5
--- /dev/null
+++ b/protocols/Steam/src/steam_ws.cpp
@@ -0,0 +1,325 @@
+/*
+Copyright (C) 2012-25 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, MODULENAME, DBKEY_HOSTS_DATE);
+	int iHostCount = db_get_dw(0, MODULENAME, DBKEY_HOSTS_COUNT);
+	if (!iHostCount || time(0) - iTimeDiff > 3600 * 24 * 7) { // once a week
+		if (!SendRequest(new GetHostsRequest(), &CSteamProto::OnGotHosts)) {
+			Logout();
+			return;
+		}
+		iHostCount = db_get_dw(0, MODULENAME, DBKEY_HOSTS_COUNT);
+	}
+
+	srand(time(0));
+	m_ws = nullptr;
+
+	CMStringA szHost;
+	szHost.Format("Host%d", rand() % iHostCount);
+	szHost = db_get_sm(0, MODULENAME, szHost);
+	szHost.Insert(0, "wss://");
+	szHost += "/cmsocket/";
+
+	WebSocket<CSteamProto> ws(this);
+
+	NLHR_PTR pReply(ws.connect(m_hNetlibUser, szHost));
+	if (pReply) {
+		if (pReply->resultCode == 101) {
+			m_ws = &ws;
+
+			debugLogA("Websocket connection succeeded");
+
+			// Send init packets
+			Login();
+
+			ws.run();
+		}
+		else debugLogA("websocket connection failed: %d", pReply->resultCode);
+	}
+	else debugLogA("websocket connection failed");
+
+	Logout();
+	m_impl.m_heartBeat.Stop();
+	m_ws = nullptr;
+}
+
+/////////////////////////////////////////////////////////////////////////////////////////
+
+void WebSocket<CSteamProto>::process(const uint8_t *buf, size_t cbLen)
+{
+	p->ProcessMessage(buf, cbLen);
+}
+
+void CSteamProto::ProcessMulti(const uint8_t *buf, size_t cbLen)
+{
+	proto::MsgMulti pMulti(buf, cbLen);
+	if (pMulti == nullptr) {
+		debugLogA("Unable to decode multi message, exiting");
+		return;
+	}
+
+	debugLogA("processing %s multi message of size %d", (pMulti->size_unzipped) ? "zipped" : "normal", pMulti->message_body.len);
+	
+	ptrA tmp;
+	if (pMulti->size_unzipped) {
+		tmp = (char *)mir_alloc(pMulti->size_unzipped + 1);
+		cbLen = FreeImage_ZLibGUnzip((uint8_t*)tmp.get(), pMulti->size_unzipped, pMulti->message_body.data, (unsigned)pMulti->message_body.len);
+		if (!cbLen) {
+			debugLogA("Unable to unzip multi message, exiting");
+			return;
+		}
+
+		buf = (const uint8_t *)tmp.get();
+	}
+	else {
+		buf = pMulti->message_body.data;
+		cbLen = pMulti->message_body.len;
+	}
+
+	while ((int)cbLen > 0) {
+		uint32_t cbPacketLen = *(uint32_t *)buf; buf += sizeof(uint32_t); cbLen -= sizeof(uint32_t);
+		ProcessMessage(buf, cbPacketLen);
+		buf += cbPacketLen; cbLen -= cbPacketLen;
+	}
+}
+
+void CSteamProto::ProcessMessage(const uint8_t *buf, size_t cbLen)
+{
+	ptrA szTargetJobName;
+	CMsgProtoBufHeader hdr;
+	uint32_t dwSign = *(uint32_t *)buf; buf += sizeof(uint32_t); cbLen -= sizeof(uint32_t);
+	EMsg msgType = (EMsg)(dwSign & ~STEAM_PROTOCOL_MASK);
+	bool bIsProtobuf = (dwSign & STEAM_PROTOCOL_MASK) != 0;
+
+	if (msgType == EMsg::ChannelEncryptRequest || msgType == EMsg::ChannelEncryptResult) {
+		hdr.has_jobid_source = hdr.has_jobid_target = true;
+		hdr.jobid_source = *(int64_t *)buf; buf += sizeof(int64_t);
+		hdr.jobid_target = *(int64_t *)buf; buf += sizeof(int64_t);
+		debugLogA("Encrypted results cannot be processed, ignoring");
+		return;
+	}
+	
+	if (msgType == EMsg::Multi) {
+		buf += sizeof(uint32_t); cbLen -= sizeof(uint32_t);
+		ProcessMulti(buf, cbLen);
+		return;
+	}
+
+	if (bIsProtobuf) {
+		uint32_t hdrLen = *(uint32_t *)buf; buf += sizeof(uint32_t); cbLen -= sizeof(uint32_t);
+		auto *p = cmsg_proto_buf_header__unpack(0, hdrLen, buf);
+		if (p == nullptr) {
+			debugLogA("Unable to decode message header, exiting");
+			return;
+		}
+
+		buf += hdrLen; cbLen -= hdrLen;
+		memcpy(&hdr, p, sizeof(hdr));
+		if (hdr.target_job_name) {
+			szTargetJobName = mir_strdup(hdr.target_job_name);
+			hdr.target_job_name = szTargetJobName;
+		}
+
+		cmsg_proto_buf_header__free_unpacked(p, 0);
+
+		if (hdr.has_client_sessionid)
+			m_iSessionId = hdr.client_sessionid;
+	}
+	else { // non protobuf message
+		buf += 3; // 1 byte for header size (fixed at 36), 2 bytes for header version (fixed at 2)
+		hdr.jobid_target = *(uint64_t *)buf; buf += sizeof(uint64_t);
+		hdr.jobid_source = *(uint64_t *)buf; buf += sizeof(uint64_t);
+		buf++; // 1 byte for header canary (fixed at 239)
+		hdr.steamid = *(uint64_t *)buf; buf += sizeof(uint64_t);
+		hdr.client_sessionid = *(uint32_t *)buf; buf += sizeof(uint32_t);
+		hdr.has_jobid_target = hdr.has_jobid_source = hdr.has_steamid = hdr.has_client_sessionid = true;
+		cbLen -= 30;
+	}
+
+	if (hdr.has_eresult && hdr.eresult != (int)EResult::OK)
+		debugLogA("HDR: error code %d", hdr.eresult);
+
+	// persistent callbacks
+	switch (msgType) {
+	case EMsg::ServiceMethod:
+	case EMsg::ServiceMethodResponse:
+		ProcessServiceResponse(buf, cbLen, hdr);
+		break;
+
+	default:
+		// find message descriptor first, if succeeded, try to find a message handler then
+		auto md = g_plugin.messages.find(msgType);
+		if (md == g_plugin.messages.end()) {
+			debugLogA("Received message of type %d", msgType);
+			Netlib_Dump(m_ws->getConn(), buf, cbLen, false, 0);
+		}
+		else if (auto *pMessage = protobuf_c_message_unpack(md->second, 0, cbLen, buf)) {
+			debugLogA("Received known message:\n%s", protobuf_c_text_to_string(*pMessage).c_str());
+
+			auto mh = g_plugin.messageHandlers.find(msgType);
+			if (mh != g_plugin.messageHandlers.end())
+				(this->*(mh->second))(*pMessage, hdr);
+
+			protobuf_c_message_free_unpacked(pMessage, 0);
+		}
+	}
+}
+
+void CSteamProto::ProcessServiceResponse(const uint8_t *buf, size_t cbLen, const CMsgProtoBufHeader &hdr)
+{
+	char *tmpName = NEWSTR_ALLOCA(hdr.target_job_name);
+	char *p = strchr(tmpName, '.');
+	if (!p) {
+		debugLogA("Invalid service function: %s", hdr.target_job_name);
+		return;
+	}
+
+	*p = 0;
+	auto it = g_plugin.services.find(tmpName);
+	if (it == g_plugin.services.end()) {
+		debugLogA("Unregistered service module: %s", tmpName);
+		return;
+	}
+	*p = '.';
+
+	auto pHandler = g_plugin.serviceHandlers.find(tmpName);
+	if (pHandler == g_plugin.serviceHandlers.end()) {
+		debugLogA("Unsupported service function: %s", hdr.target_job_name);
+		return;
+	}
+
+	if (char *p1 = strchr(++p, '#'))
+		*p1 = 0;
+
+	if (auto *pMethod = protobuf_c_service_descriptor_get_method_by_name(it->second, p)) {
+		auto *pDescr = (hdr.jobid_target == -1) ? pMethod->input : pMethod->output;
+		
+		if (auto *pMessage = protobuf_c_message_unpack(pDescr, 0, cbLen, buf)) {
+			debugLogA("Processing service message: %s\n%s", hdr.target_job_name, protobuf_c_text_to_string(*pMessage).c_str());
+
+			(this->*(pHandler->second))(*pMessage, hdr);
+			protobuf_c_message_free_unpacked(pMessage, 0);
+		}
+	}
+	else debugLogA("Unregistered service method: %s", hdr.target_job_name);
+}
+
+/////////////////////////////////////////////////////////////////////////////////////////
+
+void CSteamProto::WSSend(EMsg msgType, const ProtobufCppMessage &msg)
+{
+	CMsgProtoBufHeader hdr;
+	hdr.has_client_sessionid = hdr.has_steamid = hdr.has_jobid_source = hdr.has_jobid_target = true;
+	hdr.steamid = m_iSteamId;
+	hdr.client_sessionid = m_iSessionId;
+
+	switch (msgType) {
+	case EMsg::ClientHello:
+		hdr.jobid_source = -1;
+		break;
+
+	default:
+		hdr.jobid_source = getRandomInt();
+		break;
+	}
+
+	hdr.jobid_target = -1;
+
+	WSSendHeader(msgType, hdr, msg);
+}
+
+void CSteamProto::WSSendRaw(EMsg msgType, const MBinBuffer &body)
+{
+	MBinBuffer payload;
+	payload << (uint32_t)(int)msgType << uint8_t(36) << uint16_t(2) << uint64_t(-1) << getRandomInt()
+		<< uint8_t(239) << m_iSteamId << m_iSessionId;
+	payload.append(body);
+
+	if (m_ws)
+		m_ws->sendBinary(payload.data(), payload.length());
+}
+
+void CSteamProto::WSSendHeader(EMsg msgType, const CMsgProtoBufHeader &hdr, const ProtobufCppMessage &msg)
+{
+	debugLogA("Message sent:\n%s", protobuf_c_text_to_string(msg).c_str());
+
+	uint32_t hdrLen = (uint32_t)protobuf_c_message_get_packed_size(&hdr);
+	MBinBuffer hdrbuf(hdrLen);
+	protobuf_c_message_pack(&hdr, hdrbuf.data());
+	hdrbuf.appendBefore(&hdrLen, sizeof(hdrLen));
+
+	uint32_t type = (uint32_t)msgType;
+	type |= STEAM_PROTOCOL_MASK;
+	hdrbuf.appendBefore(&type, sizeof(type));
+
+	MBinBuffer body(protobuf_c_message_get_packed_size(&msg));
+	protobuf_c_message_pack(&msg, body.data());
+
+	hdrbuf.append(body);
+	if (m_ws)
+		m_ws->sendBinary(hdrbuf.data(), hdrbuf.length());
+}
+
+void CSteamProto::WSSendAnon(const char *pszServiceName, const ProtobufCppMessage &msg)
+{
+	CMsgProtoBufHeader hdr;
+	hdr.has_client_sessionid = hdr.has_steamid = hdr.has_jobid_source = hdr.has_jobid_target = true;
+	hdr.jobid_source = getRandomInt();
+	hdr.jobid_target = -1;
+	hdr.target_job_name = (char *)pszServiceName;
+	WSSendHeader(EMsg::ServiceMethodCallFromClientNonAuthed, hdr, msg);
+}
+
+void CSteamProto::WSSendService(const char *pszServiceName, const ProtobufCppMessage &msg, void *pInfo)
+{
+	CMsgProtoBufHeader hdr;
+	hdr.has_client_sessionid = hdr.has_steamid = hdr.has_jobid_source = hdr.has_jobid_target = true;
+	hdr.steamid = m_iSteamId, hdr.client_sessionid = m_iSessionId;
+	hdr.jobid_source = getRandomInt();
+	hdr.jobid_target = -1;
+	hdr.target_job_name = (char *)pszServiceName;
+
+	if (pInfo)
+		SetRequestInfo(hdr.jobid_source, pInfo);
+
+	WSSendHeader(EMsg::ServiceMethodCallFromClient, hdr, msg);
+}
+
+/////////////////////////////////////////////////////////////////////////////////////////
+
+void CSteamProto::SetRequestInfo(uint64_t requestId, void *pInfo)
+{
+	mir_cslock lck(m_csRequestLock);
+	m_requestInfo[requestId] = pInfo;
+}
+
+void* CSteamProto::GetRequestInfo(uint64_t requestId)
+{
+	mir_cslock lck(m_csRequestLock);
+	auto it = m_requestInfo.find(requestId);
+	if (it == m_requestInfo.end())
+		return nullptr;
+
+	void *pRet = it->second;
+	m_requestInfo.erase(it);
+	return pRet;
+}