/*

Jabber Protocol Plugin for Miranda NG

Copyright (c) 2002-04  Santithorn Bunchua
Copyright (c) 2005-12  George Hazan
Copyright (c) 2007     Maxim Mluhov
Copyright (C) 2012-21 Miranda NG team

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; either version 2
of the License, or (at your option) any later version.

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, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

*/

#include "stdafx.h"

#include <windns.h>   // requires Windows Platform SDK

#include "jabber_list.h"
#include "jabber_iq.h"
#include "jabber_secur.h"
#include "jabber_caps.h"
#include "jabber_privacy.h"
#include "jabber_rc.h"
#include "jabber_proto.h"

#ifndef DNS_TYPE_SRV
#define DNS_TYPE_SRV 0x0021
#endif

static ThreadData *g_pRegInfo;  // pointer to registration thread

// <iq/> identification number for various actions
// for JABBER_REGISTER thread
int iqIdRegGetReg;
int iqIdRegSetReg;

struct JabberPasswordDlgParam
{
	CJabberProto *pro;

	BOOL    saveOnlinePassword;
	WORD    dlgResult;
	wchar_t onlinePassword[128];
	HANDLE  hEventPasswdDlg;
	char   *pszJid;
};

static INT_PTR CALLBACK JabberPasswordDlgProc(HWND hwndDlg, UINT msg, WPARAM wParam, LPARAM lParam)
{
	JabberPasswordDlgParam* param = (JabberPasswordDlgParam*)GetWindowLongPtr(hwndDlg, GWLP_USERDATA);

	switch (msg) {
	case WM_INITDIALOG:
		TranslateDialogDefault(hwndDlg);

		param = (JabberPasswordDlgParam*)lParam;
		SetWindowLongPtr(hwndDlg, GWLP_USERDATA, lParam);

		wchar_t text[512];
		mir_snwprintf(text, TranslateT("Enter password for %s"), Utf2T(param->pszJid).get());
		SetDlgItemText(hwndDlg, IDC_JID, text);

		CheckDlgButton(hwndDlg, IDC_SAVEPASSWORD, param->pro->getByte("SaveSessionPassword", 0) ? BST_CHECKED : BST_UNCHECKED);
		return TRUE;

	case WM_COMMAND:
		switch (LOWORD(wParam)) {
		case IDC_SAVE_PERM:
			EnableWindow(GetDlgItem(hwndDlg, IDC_SAVEPASSWORD), BST_UNCHECKED == IsDlgButtonChecked(hwndDlg, IDC_SAVE_PERM));
			break;
		case IDOK:
			param->saveOnlinePassword = IsDlgButtonChecked(hwndDlg, IDC_SAVEPASSWORD);
			param->pro->setByte("SaveSessionPassword", param->saveOnlinePassword);

			GetDlgItemText(hwndDlg, IDC_PASSWORD, param->onlinePassword, _countof(param->onlinePassword));
			{
				BOOL savePassword = IsDlgButtonChecked(hwndDlg, IDC_SAVE_PERM);
				param->pro->setByte("SavePassword", savePassword);
				if (savePassword) {
					param->pro->setWString("Password", param->onlinePassword);
					param->saveOnlinePassword = true;
				}
			}
			__fallthrough;

		case IDCANCEL:
			param->dlgResult = LOWORD(wParam);
			SetEvent(param->hEventPasswdDlg);
			DestroyWindow(hwndDlg);
			return TRUE;
		}
		break;
	}

	return FALSE;
}

static VOID CALLBACK JabberPasswordCreateDialogApcProc(void *param)
{
	CreateDialogParam(g_plugin.getInst(), MAKEINTRESOURCE(IDD_PASSWORD), nullptr, JabberPasswordDlgProc, (LPARAM)param);
}

/////////////////////////////////////////////////////////////////////////////////////////
// Jabber keep-alive thread

void CJabberProto::OnPingReply(const TiXmlElement*, CJabberIqInfo *pInfo)
{
	if (!pInfo)
		return;

	if (pInfo->GetIqType() == JABBER_IQ_TYPE_FAIL) {
		// disconnect because of timeout
		if (m_bEnableStreamMgmt)
			m_StrmMgmt.SendAck();
		m_ThreadInfo->send("</stream:stream>");
		m_ThreadInfo->shutdown();
	}
}

/////////////////////////////////////////////////////////////////////////////////////////

void CJabberProto::JLoginFailed(int errorCode)
{
	m_savedPassword = nullptr;
	ProtoBroadcastAck(0, ACKTYPE_LOGIN, ACKRESULT_FAILED, nullptr, errorCode);
}

/////////////////////////////////////////////////////////////////////////////////////////

static int CompareDNS(const DNS_SRV_DATAA* dns1, const DNS_SRV_DATAA* dns2)
{
	return (int)dns1->wPriority - (int)dns2->wPriority;
}

void ThreadData::xmpp_client_query(void)
{
	if (inet_addr(conn.server) != INADDR_NONE)
		return;

	char temp[256];
	mir_snprintf(temp, "_xmpp-client._tcp.%s", conn.server);

	DNS_RECORDA *results = nullptr;
	DNS_STATUS status = DnsQuery_A(temp, DNS_TYPE_SRV, DNS_QUERY_STANDARD, nullptr, (PDNS_RECORD *)&results, nullptr);
	if (SUCCEEDED(status) && results) {
		LIST<DNS_SRV_DATAA> dnsList(5, CompareDNS);

		for (DNS_RECORDA *rec = results; rec; rec = rec->pNext)
			if (rec->Data.Srv.pNameTarget && rec->wType == DNS_TYPE_SRV)
				dnsList.insert(&rec->Data.Srv);

		for (auto &it : dnsList) {
			WORD dnsPort = (conn.port == 0 || conn.port == 5222) ? it->wPort : conn.port;
			char* dnsHost = it->pNameTarget;

			proto->debugLogA("%s%s resolved to %s:%d", "_xmpp-client._tcp.", conn.server, dnsHost, dnsPort);
			s = proto->WsConnect(dnsHost, dnsPort);
			if (s) {
				strncpy_s(conn.manualHost, dnsHost, _TRUNCATE);
				conn.port = dnsPort;
				break;
			}
		}
		DnsRecordListFree(results, DnsFreeRecordList);
	}
	else proto->debugLogA("%s not resolved", temp);
}

void CJabberProto::xmlStreamInitialize(char *szWhich)
{
	debugLogA("Stream will be initialized %s", szWhich);
	replaceStr(m_szXmlStreamToBeInitialized, szWhich);
}

void CJabberProto::xmlStreamInitializeNow(ThreadData *info)
{
	debugLogA("Stream is initializing %s",
		m_szXmlStreamToBeInitialized ? m_szXmlStreamToBeInitialized : "after connect");
	replaceStr(m_szXmlStreamToBeInitialized, 0);

	m_bStreamSent = true;
	XmlNode n("stream:stream"); 
	n << XATTR("xmlns", "jabber:client") << XATTR("to", info->conn.server) << XATTR("xmlns:stream", "http://etherx.jabber.org/streams");
	n.InsertFirstChild(n.NewDeclaration("xml version=\"1.0\" encoding=\"UTF-8\""));

	if (m_tszSelectedLang)
		n << XATTR("xml:lang", m_tszSelectedLang);

	if (!m_bDisable3920auth)
		n << XATTR("version", "1.0");

	tinyxml2::XMLPrinter printer(0, true);
	n.Print(&printer);
	CMStringA buf(printer.CStr());
	if (buf.GetLength() > 2)
		buf.Delete(buf.GetLength() - 2, 1);

	info->send(buf.GetBuffer(), buf.GetLength());
}

void CJabberProto::ServerThread(JABBER_CONN_DATA *pParam)
{
	ThreadData info(this, pParam);
	ptrA tszValue;

	debugLogA("Thread started: type=%d", info.bIsReg);
	Thread_SetName("Jabber: ServerThread");

	if (m_bManualConnect == TRUE) {
		ptrA szManualHost(getStringA("ManualHost"));
		if (szManualHost != nullptr)
			strncpy_s(info.conn.manualHost, szManualHost, _TRUNCATE);

		info.conn.port = getWord("ManualPort", JABBER_DEFAULT_PORT);
	}
	else info.conn.port = getWord("Port", JABBER_DEFAULT_PORT);

	info.conn.useSSL = m_bUseSSL;

	if (!info.bIsReg) {
		// Normal server connection, we will fetch all connection parameters
		// e.g. username, password, etc. from the database.
		if (m_ThreadInfo != nullptr) {
			debugLogA("Thread ended, another normal thread is running");
			return;
		}

		m_ThreadInfo = &info;

		if ((tszValue = getUStringA("LoginName")) != nullptr)
			strncpy_s(info.conn.username, tszValue, _TRUNCATE);

		if (*rtrim(info.conn.username) == '\0') {
			DWORD dwSize = _countof(info.conn.username);
			if (GetUserNameA(info.conn.username, &dwSize))
				setString("LoginName", info.conn.username);
			else
				info.conn.username[0] = 0;
		}

		if (*rtrim(info.conn.username) == '\0') {
			debugLogA("Thread ended, login name is not configured");
			JLoginFailed(LOGINERR_BADUSERID);

LBL_FatalError:
			debugLogA("m_iDesiredStatus reset to (%d,%d) => %d", m_iStatus, m_iDesiredStatus, ID_STATUS_OFFLINE);
			int oldStatus = m_iStatus;
			m_iDesiredStatus = m_iStatus = ID_STATUS_OFFLINE;
			ProtoBroadcastAck(0, ACKTYPE_STATUS, ACKRESULT_SUCCESS, (HANDLE)oldStatus, m_iStatus);
			return;
		}

		ptrA szValue(getStringA("LoginServer"));
		if (szValue != nullptr)
			strncpy_s(info.conn.server, szValue, _TRUNCATE);
		else {
			ProtoBroadcastAck(0, ACKTYPE_LOGIN, ACKRESULT_FAILED, nullptr, LOGINERR_NONETWORK);
			debugLogA("Thread ended, login server is not configured");
			goto LBL_FatalError;
		}

		if (m_bHostNameAsResource) {
			DWORD dwCompNameLen = _countof(info.resource) - 1;
			if (!GetComputerNameA(info.resource, &dwCompNameLen))
				strncpy_s(info.resource, "Miranda", _TRUNCATE);
		}
		else {
			if ((tszValue = getUStringA("Resource")) != nullptr)
				strncpy_s(info.resource, tszValue, _TRUNCATE);
			else
				mir_strcpy(info.resource, "Miranda");
		}

		char jidStr[512];
		mir_snprintf(jidStr, "%s@%s/%s", info.conn.username, info.conn.server, info.resource);
		strncpy_s(info.fullJID, jidStr, _TRUNCATE);

		if (m_bUseDomainLogin) // in the case of NTLM auth we have no need in password
			info.conn.password[0] = 0;
		else if (!m_bSavePassword) { // we have to enter a password manually. have we done it before?
			if (m_savedPassword != nullptr)
				strncpy_s(info.conn.password, T2Utf(m_savedPassword), _TRUNCATE);
			else {
				mir_snprintf(jidStr, "%s@%s", info.conn.username, info.conn.server);

				JabberPasswordDlgParam param;
				param.pro = this;
				param.pszJid = jidStr;
				param.hEventPasswdDlg = CreateEvent(nullptr, FALSE, FALSE, nullptr);
				CallFunctionAsync(JabberPasswordCreateDialogApcProc, &param);
				WaitForSingleObject(param.hEventPasswdDlg, INFINITE);
				CloseHandle(param.hEventPasswdDlg);

				if (param.dlgResult == IDCANCEL) {
					JLoginFailed(LOGINERR_BADUSERID);
					debugLogA("Thread ended, password request dialog was canceled");
					goto LBL_FatalError;
				}

				m_savedPassword = (param.saveOnlinePassword) ? mir_wstrdup(param.onlinePassword) : nullptr;
				strncpy_s(info.conn.password, T2Utf(param.onlinePassword), _TRUNCATE);
			}
		}
		else {
			ptrA tszPassw(getUStringA("Password"));
			if (tszPassw == nullptr) {
				JLoginFailed(LOGINERR_BADUSERID);
				debugLogA("Thread ended, password is not configured");
				goto LBL_FatalError;
			}
			strncpy_s(info.conn.password, tszPassw, _TRUNCATE);
		}
	}
	else {
		// Register new user connection, all connection parameters are already filled-in.
		// Multiple thread allowed, although not possible :)
		// thinking again.. multiple thread should not be allowed
		info.reg_done = false;
		info.conn.SetProgress(25, TranslateT("Connecting..."));
		iqIdRegGetReg = -1;
		iqIdRegSetReg = -1;
	}

	int jabberNetworkBufferSize = 2048;
	if ((info.buffer = (char*)mir_alloc(jabberNetworkBufferSize + 1)) == nullptr) {	// +1 is for '\0' when debug logging this buffer
		debugLogA("Cannot allocate network buffer, thread ended");
		if (info.bIsReg)
			info.conn.SetProgress(100, TranslateT("Error: Not enough memory"));
		else
			ProtoBroadcastAck(0, ACKTYPE_LOGIN, ACKRESULT_FAILED, nullptr, LOGINERR_NONETWORK);

		debugLogA("Thread ended, network buffer cannot be allocated");
		goto LBL_FatalError;
	}

	if (info.conn.manualHost[0] == 0) {
		info.xmpp_client_query();
		if (info.s == nullptr) {
			strncpy_s(info.conn.manualHost, info.conn.server, _TRUNCATE);
			info.s = WsConnect(info.conn.manualHost, info.conn.port);
		}
	}
	else info.s = WsConnect(info.conn.manualHost, info.conn.port);

	debugLogA("Thread type=%d server='%s' port='%d'", info.bIsReg, info.conn.manualHost, info.conn.port);
	if (info.s == nullptr) {
		debugLogA("Connection failed (%d)", WSAGetLastError());
		if (!info.bIsReg) {
			if (m_ThreadInfo == &info)
				ProtoBroadcastAck(0, ACKTYPE_LOGIN, ACKRESULT_FAILED, nullptr, LOGINERR_NONETWORK);
		}
		else info.conn.SetProgress(100, TranslateT("Error: Cannot connect to the server"));

		debugLogA("Thread ended, connection failed");
		goto LBL_FatalError;
	}

	// Determine local IP
	if (info.conn.useSSL) {
		debugLogA("Intializing SSL connection");
		if (!Netlib_StartSsl(info.s, nullptr)) {
			debugLogA("SSL intialization failed");
			if (!info.bIsReg)
				ProtoBroadcastAck(0, ACKTYPE_LOGIN, ACKRESULT_FAILED, nullptr, LOGINERR_NONETWORK);
			else
				info.conn.SetProgress(100, TranslateT("Error: Cannot connect to the server"));

			info.close();
			debugLogA("Thread ended, SSL connection failed");
			goto LBL_FatalError;
		}
	}

	// User may change status to OFFLINE while we are connecting above
	if (m_iDesiredStatus != ID_STATUS_OFFLINE || info.bIsReg) {
		bool bSendKeepAlive = false;

		if (!info.bIsReg) {
			m_szJabberJID = CMStringA(FORMAT, "%s@%s", info.conn.username, info.conn.server).Detach();
			bSendKeepAlive = m_bKeepAlive;
			setUString("jid", m_szJabberJID); // store jid in database

			ListInit();
		}

		xmlStreamInitializeNow(&info);

		debugLogA("Entering main recv loop");
		int datalen = 0;

		// cache values
		DWORD dwConnectionKeepAliveInterval = m_iConnectionKeepAliveInterval;
		for (;;) {
			if (!info.useZlib || info.zRecvReady) {
				DWORD dwIdle = GetTickCount() - m_lastTicks;
				if (dwIdle >= dwConnectionKeepAliveInterval)
					dwIdle = dwConnectionKeepAliveInterval - 10; // now!

				NETLIBSELECT nls = {};
				nls.dwTimeout = dwConnectionKeepAliveInterval - dwIdle;
				nls.hReadConns[0] = info.s;
				int nSelRes = Netlib_Select(&nls);
				if (nSelRes == -1) // error
					break;
				else if (nSelRes == 0) {
					if (bSendKeepAlive) {
						if (info.jabberServerCaps & JABBER_CAPS_PING) {
							CJabberIqInfo *pInfo = AddIQ(&CJabberProto::OnPingReply, JABBER_IQ_TYPE_GET, nullptr, this);
							pInfo->SetTimeout(m_iConnectionKeepAliveTimeout);
							info.send(XmlNodeIq(pInfo) << XATTR("from", info.fullJID) << XCHILDNS("ping", JABBER_FEAT_PING));
						}
						else info.send(" \t ");
					}
					
					if (m_bEnableStreamMgmt)
						m_StrmMgmt.RequestAck();
				}
			}

			int recvResult = info.recv(info.buffer + datalen, jabberNetworkBufferSize - datalen);
			debugLogA("recvResult = %d", recvResult);
			if (recvResult <= 0)
				break;
			datalen += recvResult;

recvRest:
			info.buffer[datalen] = '\0';

			int bytesParsed = 0;
			TiXmlDocument root;
			if (m_bStreamSent) {
				m_bStreamSent = false;
				char *p = strstr(info.buffer, "<stream:stream");
				if (p) {
					char *q = strchr(p + 15, '>');
					if (q) {
						CMStringA tmp(info.buffer, int(q - info.buffer)+1);
						tmp.Append("</stream:stream>");

						if (0 == root.Parse(tmp)) {
							for (auto *n : TiXmlEnum(&root))
								OnProcessProtocol(n, &info);
							bytesParsed = root.BytesParsed() - 16;
							debugLogA("bytesParsed = %d", bytesParsed);
						}
					}
				}
			}
			
			if (bytesParsed == 0) {
				if (0 == root.Parse(info.buffer)) {
					for (auto *n : TiXmlEnum(&root))
						OnProcessProtocol(n, &info);
					bytesParsed = root.BytesParsed();
					debugLogA("bytesParsed = %d", bytesParsed);
				}
				else debugLogA("parsing error %d: %s", root.ErrorID(), root.ErrorStr());
			}

			if (bytesParsed > 0) {
				if (bytesParsed < datalen)
					memmove(info.buffer, info.buffer + bytesParsed, datalen - bytesParsed);
				datalen -= bytesParsed;
			}
			else if (datalen >= jabberNetworkBufferSize) {
				//jabberNetworkBufferSize += 65536;
				jabberNetworkBufferSize *= 2;
				debugLogA("Increasing network buffer size to %d", jabberNetworkBufferSize);
				if ((info.buffer = (char*)mir_realloc(info.buffer, jabberNetworkBufferSize + 1)) == nullptr) {
					debugLogA("Cannot reallocate more network buffer, go offline now");
					break;
				}
			}
			else debugLogA("Unknown state: bytesParsed=%d, datalen=%d, jabberNetworkBufferSize=%d", bytesParsed, datalen, jabberNetworkBufferSize);

			if (m_szXmlStreamToBeInitialized)
				xmlStreamInitializeNow(&info);

			if (root.FirstChild() && datalen)
				goto recvRest;
		}

		if (!info.bIsReg) {
			m_iqManager.ExpireAll();
			m_bJabberOnline = false;
			info.zlibUninit();
			EnableMenuItems(false);
			RebuildInfoFrame();
			if (m_hwndJabberChangePassword)
				// Since this is a different thread, simulate the click on the cancel button instead
				SendMessage(m_hwndJabberChangePassword, WM_COMMAND, MAKEWORD(IDCANCEL, 0), 0);

			// Quit all chatrooms (will send quit message)
			LISTFOREACH(i, this, LIST_CHATROOM)
				if (JABBER_LIST_ITEM *item = ListGetItemPtrFromIndex(i))
					GcQuit(item, 0, nullptr);

			ListRemoveList(LIST_CHATROOM);
			ListRemoveList(LIST_BOOKMARK);
			UI_SAFE_NOTIFY_HWND(m_hwndJabberAddBookmark, WM_PROTO_CHECK_ONLINE);
			WindowList_Broadcast(m_hWindowList, WM_PROTO_CHECK_ONLINE, 0, 0);

			// Set status to offline
			debugLogA("m_iDesiredStatus reset to (%d,%d) => %d", m_iStatus, m_iDesiredStatus, ID_STATUS_OFFLINE);
			int oldStatus = m_iStatus;
			m_iDesiredStatus = m_iStatus = ID_STATUS_OFFLINE;
			ProtoBroadcastAck(0, ACKTYPE_STATUS, ACKRESULT_SUCCESS, (HANDLE)oldStatus, m_iStatus);

			// Set all contacts to offline
			debugLogA("leaving worker thread");
			if (!m_StrmMgmt.IsResumeIdPresent()) {
				m_StrmMgmt.ResetState(); // fully reset strm_mgmt state
				for (auto &hContact : AccContacts())
					SetContactOfflineStatus(hContact);
			}

			mir_free(m_szJabberJID);
			m_szJabberJID = nullptr;
			m_tmJabberLoggedInTime = 0;
			ListWipe();

			WindowList_Broadcast(m_hWindowList, WM_JABBER_REFRESH_VCARD, 0, 0);
		}
		else {
			if (!info.reg_done)
				info.conn.SetProgress(100, TranslateT("Error: Connection lost"));
			g_pRegInfo = nullptr;
		}
	}
	else if (!info.bIsReg) {
		int oldStatus = m_iStatus;
		m_iDesiredStatus = m_iStatus = ID_STATUS_OFFLINE;
		ProtoBroadcastAck(0, ACKTYPE_STATUS, ACKRESULT_SUCCESS, (HANDLE)oldStatus, m_iStatus);
	}

	debugLogA("Thread ended: type=%d server='%s'", info.bIsReg, info.conn.server);

	info.close();
	debugLogA("Exiting ServerThread");
}

void CJabberProto::PerformRegistration(ThreadData *info)
{
	iqIdRegGetReg = SerialNext();
	info->send(XmlNodeIq("get", iqIdRegGetReg, nullptr) << XQUERY(JABBER_FEAT_REGISTER));

	info->conn.SetProgress(50, TranslateT("Requesting registration instruction..."));
}

void CJabberProto::PerformIqAuth(ThreadData *info)
{
	if (!info->bIsReg) {
		info->send(XmlNodeIq(AddIQ(&CJabberProto::OnIqResultGetAuth, JABBER_IQ_TYPE_GET))
			<< XQUERY("jabber:iq:auth") << XCHILD("username", info->conn.username));
	}
	else PerformRegistration(info);
}

/////////////////////////////////////////////////////////////////////////////////////////

void CJabberProto::OnProcessStreamOpening(const TiXmlElement *node, ThreadData *info)
{
	if (mir_strcmp(node->Name(), "stream:stream"))
		return;

	if (!info->bIsReg) {
		const char *sid = XmlGetAttr(node, "id");
		if (sid != nullptr)
			info->szStreamId = mir_strdup(sid);
	}

	if (info->proto->m_bDisable3920auth)
		info->proto->PerformIqAuth(info);
}

void CJabberProto::PerformAuthentication(ThreadData *info)
{
	// no known mechanisms 
	if (m_arAuthMechs.getCount() == 0) {
		// if iq_auth is available, use it
		if (m_isAuthAvailable) {
			m_isAuthAvailable = false;
			PerformIqAuth(info);
			return;
		}

		char text[1024];
		mir_snprintf(text, TranslateU("Authentication failed for %s@%s."), info->conn.username, info->conn.server);
		MsgPopup(0, Utf2T(text), TranslateT("Authentication"));
	
		JLoginFailed(LOGINERR_WRONGPASSWORD);
		info->send("</stream:stream>");
		m_ThreadInfo = nullptr;
		return;
	}

	auto &auth = m_arAuthMechs[0];
	info->send(XmlNode("auth", ptrA(auth.getInitialRequest())) << XATTR("xmlns", "urn:ietf:params:xml:ns:xmpp-sasl") << XATTR("mechanism", auth.getName()));
}

/////////////////////////////////////////////////////////////////////////////////////////

void CJabberProto::OnProcessFeatures(const TiXmlElement *node, ThreadData *info)
{
	info->jabberServerCaps = JABBER_RESOURCE_CAPS_NONE;

	bool isRegisterAvailable = false;
	bool areMechanismsDefined = false;

	for (auto *n : TiXmlEnum(node)) {
		auto *pszName = n->Name();
		if (!mir_strcmp(pszName, "starttls")) {
			if (!info->conn.useSSL && m_bUseTLS) {
				debugLogA("Requesting TLS");
				info->send(XmlNode(pszName) << XATTR("xmlns", "urn:ietf:params:xml:ns:xmpp-tls"));
				return;
			}
		}

		if (!mir_strcmp(pszName, "compression") && m_bEnableZlib == TRUE) {
			debugLogA("Server compression available");
			for (auto *c : TiXmlFilter(n, "method")) {
				if (!mir_strcmp(c->GetText(), "zlib") && info->zlibInit()) {
					debugLogA("Requesting Zlib compression");
					info->send(XmlNode("compress") << XATTR("xmlns", "http://jabber.org/protocol/compress")
						<< XCHILD("method", "zlib"));
					return;
				}
			}
		}

		if (!mir_strcmp(pszName, "mechanisms")) {
			m_arAuthMechs.destroy();
			replaceStr(info->gssapiHostName, nullptr);

			areMechanismsDefined = true;

			for (auto *c : TiXmlEnum(n)) {
				if (!mir_strcmp(c->Name(), "mechanism")) {
					TJabberAuth *pAuth = nullptr;
					const char *szMechanism = c->GetText();
					if (!mir_strcmp(szMechanism, "PLAIN")) {
						m_arAuthMechs.insert(new TPlainAuth(info, false));
						pAuth = new TPlainAuth(info, true);
					}
					else if (!mir_strcmp(szMechanism, "DIGEST-MD5"))
						pAuth = new TMD5Auth(info);
					else if (!mir_strcmp(szMechanism, "SCRAM-SHA-1"))
						pAuth = new TScramAuth(info, szMechanism, EVP_sha1(), 500);
					else if (!mir_strcmp(szMechanism, "SCRAM-SHA-1-PLUS"))
						pAuth = new TScramAuth(info, szMechanism, EVP_sha1(), 600);
					else if (!mir_strcmp(szMechanism, "SCRAM-SHA-224"))
						pAuth = new TScramAuth(info, szMechanism, EVP_sha224(), 510);
					else if (!mir_strcmp(szMechanism, "SCRAM-SHA-224-PLUS"))
						pAuth = new TScramAuth(info, szMechanism, EVP_sha224(), 610);
					else if (!mir_strcmp(szMechanism, "SCRAM-SHA-256"))
						pAuth = new TScramAuth(info, szMechanism, EVP_sha256(), 520);
					else if (!mir_strcmp(szMechanism, "SCRAM-SHA-256-PLUS"))
						pAuth = new TScramAuth(info, szMechanism, EVP_sha256(), 620);
					else if (!mir_strcmp(szMechanism, "SCRAM-SHA-384"))
						pAuth = new TScramAuth(info, szMechanism, EVP_sha384(), 530);
					else if (!mir_strcmp(szMechanism, "SCRAM-SHA-384-PLUS"))
						pAuth = new TScramAuth(info, szMechanism, EVP_sha384(), 630);
					else if (!mir_strcmp(szMechanism, "SCRAM-SHA-512"))
						pAuth = new TScramAuth(info, szMechanism, EVP_sha512(), 540);
					else if (!mir_strcmp(szMechanism, "SCRAM-SHA-512-PLUS"))
						pAuth = new TScramAuth(info, szMechanism, EVP_sha512(), 640);
					else if (!mir_strcmp(szMechanism, "NTLM") || !mir_strcmp(szMechanism, "GSS-SPNEGO") || !mir_strcmp(szMechanism, "GSSAPI"))
						pAuth = new TNtlmAuth(info, szMechanism);
					else {
						debugLogA("Unsupported auth mechanism: %s, skipping", szMechanism);
						continue;
					}

					if (!pAuth->isValid())
						delete pAuth;
					else
						m_arAuthMechs.insert(pAuth);
				}
				else if (!mir_strcmp(c->Name(), "hostname")) {
					const char *mech = XmlGetAttr(c, "mechanism");
					if (mech && mir_strcmpi(mech, "GSSAPI") == 0)
						info->gssapiHostName = mir_strdup(c->GetText());
				}
			}
		}
		else if (!mir_strcmp(pszName, "register"))
			isRegisterAvailable = true;
		else if (!mir_strcmp(pszName, "auth"))
			m_isAuthAvailable = true;
		else if (!mir_strcmp(pszName, "session"))
			m_isSessionAvailable = true;
		else if (m_bEnableStreamMgmt && !mir_strcmp(pszName, "sm"))
			m_StrmMgmt.CheckStreamFeatures(n);
		else if (!mir_strcmp(pszName, "csi") && n->Attribute("xmlns", JABBER_FEAT_CSI))
			m_bCisAvailable = true;
		else if (!mir_strcmp(pszName, "c") && !mir_strcmp(n->Attribute("xmlns"), JABBER_FEAT_ENTITY_CAPS)) {
			auto *szNode = n->Attribute("node"), *szHash = n->Attribute("ver");
			auto *pCaps = g_clientCapsManager.GetPartialCaps(szNode, szHash);
			if (pCaps == nullptr) {
				CMStringA payLoad(FORMAT, "%s%c%s", szNode, 0, szHash);
				info->pPendingQuery = AddIQ(&CJabberProto::OnIqResultServerDiscoInfo, JABBER_IQ_TYPE_GET, info->conn.server, payLoad.Detach(), 1);
			}
			else info->jabberServerCaps |= pCaps->GetCaps();
		}
	}

	if (areMechanismsDefined) {
		if (info->bIsReg)
			PerformRegistration(info);
		else
			PerformAuthentication(info);
		return;
	}

	// mechanisms are not defined.
	if (m_bEnableStreamMgmt && m_StrmMgmt.IsResumeIdPresent()) // resume should be done here
		m_StrmMgmt.CheckState();
	else {
		if (m_arAuthMechs.getCount()) { // we are already logged-in
			info->send(
				XmlNodeIq(AddIQ(&CJabberProto::OnIqResultBind, JABBER_IQ_TYPE_SET))
				<< XCHILDNS("bind", JABBER_FEAT_BIND)
				<< XCHILD("resource", info->resource));

			if (m_isSessionAvailable)
				info->bIsSessionAvailable = true;
		}
		else // mechanisms are not available and we are not logged in
			PerformIqAuth(info);
	}
}

void CJabberProto::OnProcessFailure(const TiXmlElement *node, ThreadData *info)
{
	// failure xmlns=\"urn:ietf:params:xml:ns:xmpp-sasl\"
	const char *type = XmlGetAttr(node, "xmlns");
	if (!mir_strcmp(type, "urn:ietf:params:xml:ns:xmpp-sasl")) {
		m_arAuthMechs.remove(0L);
		PerformAuthentication(info);
	}
}

void CJabberProto::OnProcessFailed(const TiXmlElement *node, ThreadData *info) //used failed instead of failure, notes: https://xmpp.org/extensions/xep-0198.html#errors
{
	m_StrmMgmt.OnProcessFailed(node, info);
}

void CJabberProto::OnProcessEnabled(const TiXmlElement *node, ThreadData * info)
{
	if (m_bEnableStreamMgmt && !mir_strcmp(XmlGetAttr(node, "xmlns"), "urn:xmpp:sm:3"))
		m_StrmMgmt.OnProcessEnabled(node, info);
}

void CJabberProto::OnProcessError(const TiXmlElement *node, ThreadData *info)
{
	//failure xmlns=\"urn:ietf:params:xml:ns:xmpp-sasl\"
	if (!XmlFirstChild(node, 0))
		return;

	bool skipMsg = false;
	CMStringA buff;
	for (auto *n : TiXmlEnum(node)) {
		const char *name = n->Name();
		const char *desc = n->GetText();
		if (desc)
			buff.AppendFormat("%s: %s\r\n", name, desc);
		else
			buff.AppendFormat("%s\r\n", name);

		if (!mir_strcmp(name, "conflict"))
			ProtoBroadcastAck(0, ACKTYPE_LOGIN, ACKRESULT_FAILED, nullptr, LOGINERR_OTHERLOCATION);
		else if (!mir_strcmp(name, "see-other-host")) {
			skipMsg = true;
		}
	}
	if (!skipMsg)
		MsgPopup(0, Utf2T(buff), TranslateT("Error"));

	if (m_bEnableStreamMgmt) //TODO: check if needed/work here
		m_StrmMgmt.SendAck();
	info->send("</stream:stream>");
}

void CJabberProto::OnProcessSuccess(const TiXmlElement *node, ThreadData *info)
{
	const char *type;
	//	int iqId;
	// RECVED: <success ...
	// ACTION: if successfully logged in, continue by requesting roster list and set my initial status
	if ((type = XmlGetAttr(node, "xmlns")) == nullptr)
		return;

	if (!mir_strcmp(type, "urn:ietf:params:xml:ns:xmpp-sasl")) {
		if (!m_arAuthMechs[0].validateLogin(node->GetText())) {
			info->send("</stream:stream>");
			return;
		}

		debugLogA("Success: Logged-in.");
		ptrA szNick(getUStringA("Nick"));
		if (!mir_strlen(szNick))
			setUString("Nick", info->conn.username);

		xmlStreamInitialize("after successful sasl");
	}
	else debugLogA("Success: unknown action %s.", type);
}

void CJabberProto::OnProcessChallenge(const TiXmlElement *node, ThreadData *info)
{
	if (m_arAuthMechs.getCount() == 0) {
		debugLogA("No previous auth have been made, exiting...");
		return;
	}

	if (mir_strcmp(XmlGetAttr(node, "xmlns"), "urn:ietf:params:xml:ns:xmpp-sasl"))
		return;

	char* challenge = m_arAuthMechs[0].getChallenge(node->GetText());
	info->send(XmlNode("response", challenge) << XATTR("xmlns", "urn:ietf:params:xml:ns:xmpp-sasl"));
	mir_free(challenge);
}

void CJabberProto::OnProcessProtocol(const TiXmlElement *node, ThreadData *info)
{
	OnConsoleProcessXml(node, JCPF_IN);

	if (m_bEnableStreamMgmt)
		m_StrmMgmt.HandleIncommingNode(node);
	if (!mir_strcmp(node->Name(), "proceed"))
		OnProcessProceed(node, info);
	else if (!mir_strcmp(node->Name(), "compressed"))
		OnProcessCompressed(node, info);
	else if (!mir_strcmp(node->Name(), "stream:features"))
		OnProcessFeatures(node, info);
	else if (!mir_strcmp(node->Name(), "stream:stream"))
		OnProcessStreamOpening(node, info);
	else if (!mir_strcmp(node->Name(), "success"))
		OnProcessSuccess(node, info);
	else if (!mir_strcmp(node->Name(), "failure"))
		OnProcessFailure(node, info);
	else if (!mir_strcmp(node->Name(), "stream:error"))
		OnProcessError(node, info);
	else if (!mir_strcmp(node->Name(), "challenge"))
		OnProcessChallenge(node, info);
	else if (!info->bIsReg) {
		if (!mir_strcmp(node->Name(), "message"))
			OnProcessMessage(node, info);
		else if (!mir_strcmp(node->Name(), "presence"))
			OnProcessPresence(node, info);
		else if (!mir_strcmp(node->Name(), "iq"))
			OnProcessIq(node);
		else if (!mir_strcmp(node->Name(), "failed"))
			OnProcessFailed(node, info);
		else if (!mir_strcmp(node->Name(), "enabled"))
			OnProcessEnabled(node, info);
		else if (m_bEnableStreamMgmt && !mir_strcmp(node->Name(), "resumed"))
			m_StrmMgmt.OnProcessResumed(node, info);
		else
			debugLogA("Invalid top-level tag (only <message/> <presence/> and <iq/> allowed)");
	}
	else {
		if (!mir_strcmp(node->Name(), "iq"))
			OnProcessRegIq(node, info);
		else
			debugLogA("Invalid top-level tag (only <iq/> allowed)");
	}
}

void CJabberProto::OnProcessProceed(const TiXmlElement *node, ThreadData *info)
{
	const char *type;
	if ((type = XmlGetAttr(node, "xmlns")) != nullptr && !mir_strcmp(type, "error"))
		return;

	if (!mir_strcmp(type, "urn:ietf:params:xml:ns:xmpp-tls")) {
		debugLogA("Starting TLS...");

		char* gtlk = strstr(info->conn.manualHost, "google.com");
		bool isHosted = gtlk && !gtlk[10] && mir_strcmpi(info->conn.server, "gmail.com") &&
			mir_strcmpi(info->conn.server, "googlemail.com");

		if (!Netlib_StartSsl(info->s, isHosted ? info->conn.manualHost : info->conn.server)) {
			debugLogA("SSL initialization failed");
			info->send("</stream:stream>");
			info->shutdown();
		}
		else
			xmlStreamInitialize("after successful StartTLS");
	}
}

void CJabberProto::OnProcessCompressed(const TiXmlElement *node, ThreadData *info)
{
	debugLogA("Compression confirmed");

	const char *type = XmlGetAttr(node, "xmlns");
	if (type != nullptr && !mir_strcmp(type, "error"))
		return;
	if (mir_strcmp(type, "http://jabber.org/protocol/compress"))
		return;

	debugLogA("Starting Zlib stream compression...");

	info->useZlib = true;
	info->zRecvData = (char*)mir_alloc(ZLIB_CHUNK_SIZE);

	xmlStreamInitialize("after successful Zlib init");
}

void CJabberProto::OnProcessPubsubEvent(const TiXmlElement *node)
{
	const char *from = XmlGetAttr(node, "from");
	if (!from)
		return;

	auto *eventNode = XmlGetChildByTag(node, "event", "xmlns", JABBER_FEAT_PUBSUB_EVENT);
	if (!eventNode)
		return;

	m_pepServices.ProcessEvent(from, eventNode);

	MCONTACT hContact = HContactFromJID(from);
	if (!hContact)
		return;

	if (m_bUseOMEMO) {
		auto *itemsNode = XmlGetChildByTag(eventNode, "items", "node", JABBER_FEAT_OMEMO ".devicelist");
		if (itemsNode) {
			OmemoHandleDeviceList(itemsNode);
			return;
		}
		//TODO:handle omemo device list
	}

	if (m_bEnableUserTune)
	if (auto *itemsNode = XmlGetChildByTag(eventNode, "items", "node", JABBER_FEAT_USER_TUNE)) {
		// node retract?
		if (XmlFirstChild(itemsNode, "retract")) {
			SetContactTune(hContact, nullptr, nullptr, nullptr, nullptr, nullptr);
			return;
		}

		auto *tuneNode = XmlGetChildByTag(XmlFirstChild(itemsNode, "item"), "tune", "xmlns", JABBER_FEAT_USER_TUNE);
		if (!tuneNode)
			return;

		const char *szArtist = XmlGetChildText(tuneNode, "artist");
		const char *szSource = XmlGetChildText(tuneNode, "source");
		const char *szTitle = XmlGetChildText(tuneNode, "title");
		const char *szTrack = XmlGetChildText(tuneNode, "track");

		wchar_t szLengthInTime[20];
		int nLength = XmlGetChildInt(tuneNode, "length");
		if (nLength > 0)
			mir_snwprintf(szLengthInTime, L"%02d:%02d:%02d", nLength / 3600, (nLength / 60) % 60, nLength % 60);

		SetContactTune(hContact, Utf2T(szArtist), nLength ? szLengthInTime : nullptr, Utf2T(szSource), Utf2T(szTitle), Utf2T(szTrack));
	}
}

// returns 0, if error or no events
DWORD JabberGetLastContactMessageTime(MCONTACT hContact)
{
	// TODO: time cache can improve performance
	MEVENT hDbEvent = db_event_last(hContact);
	if (!hDbEvent)
		return 0;

	DWORD dwTime = 0;

	DBEVENTINFO dbei = {};
	dbei.cbBlob = db_event_getBlobSize(hDbEvent);
	if (dbei.cbBlob != -1) {
		dbei.pBlob = (PBYTE)mir_alloc(dbei.cbBlob + 1);
		int nGetTextResult = db_event_get(hDbEvent, &dbei);
		if (!nGetTextResult)
			dwTime = dbei.timestamp;
		mir_free(dbei.pBlob);
	}
	return dwTime;
}

MCONTACT CJabberProto::CreateTemporaryContact(const char *szJid, JABBER_LIST_ITEM* chatItem)
{
	if (chatItem == nullptr)
		return DBCreateContact(szJid, nullptr, true, true);

	const char *p = strchr(szJid, '/');
	if (p != nullptr && p[1] != '\0')
		p++;
	else
		p = szJid;
	MCONTACT hContact = DBCreateContact(szJid, p, true, false);

	pResourceStatus r(chatItem->findResource(p));
	if (r)
		setWord(hContact, "Status", r->m_iStatus);

	return hContact;
}

void CJabberProto::OnProcessMessage(const TiXmlElement *node, ThreadData *info)
{
	if (!node->Name() || mir_strcmp(node->Name(), "message"))
		return;

	time_t msgTime = 0;
	bool bEnableDelivery = true, bCreateRead = false, bWasSent = false;
	auto *from = XmlGetAttr(node, "from"), *type = XmlGetAttr(node, "type"), *idStr = XmlGetAttr(node, "id");
	const char *szMsgId = nullptr; // MAM support

	// check for MAM response
	if (auto *mamResult = XmlGetChildByTag(node, "result", "xmlns", JABBER_FEAT_MAM)) {
		szMsgId = XmlGetAttr(mamResult, "id");
		if (szMsgId)
			setString("LastMamId", szMsgId);

		// we only collect ids, no need to store messages
		if (m_bMamDisableMessages)
			return;

		auto *xmlForwarded = XmlGetChildByTag(mamResult, "forwarded", "xmlns", JABBER_XMLNS_FORWARD);
		if (auto *xmlMessage = XmlFirstChild(xmlForwarded, "message")) {
			node = xmlMessage;
			type = XmlGetAttr(node, "type");
			from = XmlGetAttr(node, "from");
			auto *to = XmlGetAttr(node, "to");

			char szJid[JABBER_MAX_JID_LEN];
			JabberStripJid(from, szJid, _countof(szJid));
			if (!mir_strcmpi(szJid, m_szJabberJID)) {
				bWasSent = true;
				std::swap(from, to);
			}

			// we disable message reading with our resource only for the missing messages
			if (!m_bMamCreateRead && !mir_strcmpi(to, info->fullJID)) {
				debugLogA("MAM: outgoing message from this machine (%s), ignored", from);
				return;
			}
		}

		if (auto *xmlDelay = XmlGetChildByTag(xmlForwarded, "delay", "xmlns", "urn:xmpp:delay"))
			if (auto *ptszTimeStamp = XmlGetAttr(xmlDelay, "stamp"))
				msgTime = str2time(ptszTimeStamp);

		bEnableDelivery = false;
		bCreateRead = m_bMamCreateRead;
	}

	if (from == nullptr) {
		debugLogA("no 'from' attribute, returning");
		return;
	}

	pResourceStatus pFromResource(ResourceInfoFromJID(from));

	// Message receipts delivery request. Reply here, before a call to HandleMessagePermanent() to make sure message receipts are handled for external plugins too.
	bool bSendMark = false;
	if (bEnableDelivery && (!type || mir_strcmpi(type, "error"))) {
		bool bSendReceipt = XmlGetChildByTag(node, "request", "xmlns", JABBER_FEAT_MESSAGE_RECEIPTS) != 0;
		bSendMark = XmlGetChildByTag(node, "markable", "xmlns", JABBER_FEAT_CHAT_MARKERS) != 0;
		if (bSendReceipt || bSendMark) {
			XmlNode reply("message"); reply << XATTR("to", from) << XATTR("id", idStr);
			if (bSendReceipt) {
				if (pFromResource)
					pFromResource->m_jcbManualDiscoveredCaps |= JABBER_CAPS_MESSAGE_RECEIPTS;
				reply << XCHILDNS("received", JABBER_FEAT_MESSAGE_RECEIPTS) << XATTR("id", idStr);
			}
			if (bSendMark) {
				if (pFromResource)
					pFromResource->m_jcbManualDiscoveredCaps |= JABBER_CAPS_CHAT_MARKERS;
				reply << XCHILDNS("received", JABBER_FEAT_CHAT_MARKERS) << XATTR("id", idStr);
			}
			info->send(reply);
		}
	}

	if (m_messageManager.HandleMessagePermanent(node, info)) {
		debugLogA("permanent message handler succeeded, returning");
		return;
	}

	// Handle carbons. The message MUST be coming from our bare JID.
	const TiXmlElement *carbon = nullptr;
	if (IsMyOwnJID(from)) {
		carbon = XmlGetChildByTag(node, "received", "xmlns", JABBER_FEAT_CARBONS);
		if (!carbon) {
			if (carbon = XmlGetChildByTag(node, "sent", "xmlns", JABBER_FEAT_CARBONS))
				bWasSent = true;
		}
		if (carbon) {
			// If carbons are disabled in options, we should ignore occasional carbons sent to us by server
			if (!m_bEnableCarbons) {
				debugLogA("carbons aren't enabled, returning");
				return;
			}

			bCreateRead = true;
			auto *xmlForwarded = XmlGetChildByTag(carbon, "forwarded", "xmlns", JABBER_XMLNS_FORWARD);
			auto *xmlMessage = XmlFirstChild(xmlForwarded, "message");
			// Carbons MUST have forwarded/message content
			if (xmlMessage == nullptr) {
				debugLogA("no 'forwarded' attribute in carbons, returning");
				return;
			}

			// Unwrap the carbon in any case
			node = xmlMessage;
			type = XmlGetAttr(node, "type");

			if (!bWasSent) {
				// Received should just be treated like incoming messages, except maybe not flash the flasher. Simply unwrap.
				from = XmlGetAttr(node, "from");
				if (from == nullptr) {
					debugLogA("no 'from' attribute in carbons, returning");
					return;
				}
			}
			else {
				// Sent should set SENT flag and invert from/to.
				from = XmlGetAttr(node, "to");
				if (from == nullptr) {
					debugLogA("no 'to' attribute in carbons, returning");
					return;
				}
			}
		}
	}

	MCONTACT hContact = HContactFromJID(from);
	JABBER_LIST_ITEM *chatItem = ListGetItemPtr(LIST_CHATROOM, from);
	if (chatItem) {
		auto *xCaptcha = XmlFirstChild(node, "captcha");
		if (xCaptcha)
			if (ProcessCaptcha(xCaptcha, node, info)) {
				debugLogA("captcha processing succeeded, returning");
				return;
			}
	}

	CMStringA szMessage;
	auto *bodyNode = XmlGetChildByTag(node, "body", "xml:lang", m_tszSelectedLang);
	if (bodyNode == nullptr)
		bodyNode = XmlFirstChild(node, "body");

	auto *subject = XmlGetChildText(node, "subject");
	if (subject) {
		szMessage.Append("Subject: ");
		szMessage.Append(subject);
		szMessage.Append("\r\n");
	}

	if (szMessage) if (auto *n = XmlGetChildByTag(node, "addresses", "xmlns", JABBER_FEAT_EXT_ADDRESSING)) {
		auto *addressNode = XmlGetChildByTag(n, "address", "type", "ofrom");
		if (addressNode) {
			const char *szJid = XmlGetAttr(addressNode, "jid");
			if (szJid) {
				szMessage.AppendFormat(TranslateU("Message redirected from: %s\r\n"), from);
				from = szJid;
				// rewrite hContact
				hContact = HContactFromJID(from);
			}
		}
	}

	if (bodyNode != nullptr)
		szMessage.Append(bodyNode->GetText());

	if (auto *n = XmlGetChildByTag(node, "stanza-id", "xmlns", JABBER_FEAT_SID))
		if (szMsgId = n->Attribute("id"))
			setString("LastMamId", szMsgId);

	// If message is from a stranger (not in roster), item is nullptr
	JABBER_LIST_ITEM *item = ListGetItemPtr(LIST_ROSTER, from);
	if (item == nullptr)
		item = ListGetItemPtr(LIST_VCARD_TEMP, from);

	// check chatstates availability
	if (pFromResource && XmlGetChildByTag(node, "active", "xmlns", JABBER_FEAT_CHATSTATES))
		pFromResource->m_jcbManualDiscoveredCaps |= JABBER_CAPS_CHATSTATES;

	// chatstates composing event
	if (hContact && XmlGetChildByTag(node, "composing", "xmlns", JABBER_FEAT_CHATSTATES))
		CallService(MS_PROTO_CONTACTISTYPING, hContact, 60);

	// chatstates paused event
	if (hContact && XmlGetChildByTag(node, "paused", "xmlns", JABBER_FEAT_CHATSTATES))
		CallService(MS_PROTO_CONTACTISTYPING, hContact, PROTOTYPE_CONTACTTYPING_OFF);

	// chatstates inactive event
	if (hContact && XmlGetChildByTag(node, "inactive", "xmlns", JABBER_FEAT_CHATSTATES))
		CallService(MS_PROTO_CONTACTISTYPING, hContact, PROTOTYPE_CONTACTTYPING_OFF);

	// message receipts delivery notification
	if (auto *n = XmlGetChildByTag(node, "received", "xmlns", JABBER_FEAT_MESSAGE_RECEIPTS)) {
		int nPacketId = JabberGetPacketID(n);
		if (nPacketId == -1)
			nPacketId = JabberGetPacketID(node);
		if (nPacketId != -1)
			ProtoBroadcastAck(hContact, ACKTYPE_MESSAGE, ACKRESULT_SUCCESS, (HANDLE)nPacketId);

		if (g_plugin.bMessageState)
			CallService(MS_MESSAGESTATE_UPDATE, hContact, MRD_TYPE_DELIVERED);
	}

	if (auto *n = XmlGetChildByTag(node, "displayed", "xmlns", JABBER_FEAT_CHAT_MARKERS))
		if (g_plugin.bMessageState)
			CallService(MS_MESSAGESTATE_UPDATE, hContact, MRD_TYPE_READ);

	JabberReadXep203delay(node, msgTime);

	// XEP-0224 support (Attention/Nudge)
	if (XmlGetChildByTag(node, "attention", "xmlns", JABBER_FEAT_ATTENTION)) {
		if (!hContact)
			hContact = CreateTemporaryContact(from, chatItem);
		if (hContact)
			NotifyEventHooks(m_hEventNudge, hContact, 0);
	}

	// chatstates gone event
	if (hContact && XmlGetChildByTag(node, "gone", "xmlns", JABBER_FEAT_CHATSTATES) && m_bLogChatstates) {
		BYTE bEventType = JABBER_DB_EVENT_CHATSTATES_GONE; // gone event
		DBEVENTINFO dbei = {};
		dbei.pBlob = &bEventType;
		dbei.cbBlob = 1;
		dbei.eventType = EVENTTYPE_JABBER_CHATSTATES;
		dbei.flags = DBEF_READ;
		dbei.timestamp = time(0);
		dbei.szModule = m_szModuleName;
		db_event_add(hContact, &dbei);
	}

	if (auto *n = XmlGetChildByTag(node, "confirm", "xmlns", JABBER_FEAT_HTTP_AUTH)) if (m_bAcceptHttpAuth) {
		const char *szId = XmlGetAttr(n, "id");
		const char *szMethod = XmlGetAttr(n, "method");
		const char *szUrl = XmlGetAttr(n, "url");
		if (!szId || !szMethod || !szUrl) {
			debugLogA("missing attributes in confirm, returning");
			return;
		}

		CJabberHttpAuthParams *pParams = (CJabberHttpAuthParams *)mir_calloc(sizeof(CJabberHttpAuthParams));
		memset(pParams, 0, sizeof(CJabberHttpAuthParams));
		pParams->m_nType = CJabberHttpAuthParams::MSG;
		pParams->m_szFrom = mir_strdup(from);
		pParams->m_szThreadId = mir_strdup(XmlGetChildText(node, "thread"));
		pParams->m_szId = mir_strdup(szId);
		pParams->m_szMethod = mir_strdup(szMethod);
		pParams->m_szUrl = mir_strdup(szUrl);

		AddClistHttpAuthEvent(pParams);
		debugLogA("http auth event added, returning");
		return;
	}

	// parsing extensions
	for (auto *xNode : TiXmlEnum(node)) {
		if (m_bUseOMEMO) {
			if (!mir_strcmp(xNode->Name(), "encrypted") && xNode->Attribute("xmlns", JABBER_FEAT_OMEMO)) {
				const char *jid = XmlGetAttr(xNode, "from");
				if (jid) {
					if (!OmemoHandleMessage(xNode, jid, msgTime))
						OmemoPutMessageToIncommingQueue(xNode, jid, msgTime);
					debugLogA("OMEMO processing finished, returning");
					return; //we do not want any additional processing
				}
			}
		}

		if (0 != mir_strcmp(xNode->Name(), "x"))
			continue;

		const char *pszXmlns = XmlGetAttr(xNode, "xmlns");
		if (pszXmlns == nullptr)
			continue;

		if (!mir_strcmp(pszXmlns, JABBER_FEAT_MIRANDA_NOTES)) {
			if (OnIncomingNote(from, XmlFirstChild(xNode, "note"))) {
				debugLogA("OMEMO: no 'note' attribute, returning");
				return;
			}
		}
		else if (!mir_strcmp(pszXmlns, "jabber:x:encrypted")) {
			const char *ptszText = xNode->GetText();
			if (ptszText == nullptr) {
				debugLogA("OMEMO: no 'encrypted' attribute, returning");
				return;
			}

			if (carbon && bWasSent)
				szMessage = TranslateU("Unable to decrypt a carbon copy of the encrypted outgoing message");
			else {
				// XEP-0027 is not strict enough, different clients have different implementations
				// additional validation is required

				CMStringA tempstring;
				if (!strstr(ptszText, PGP_PROLOG))
					tempstring.Format("%s%s%s", PGP_PROLOG, ptszText, PGP_EPILOG);
				else
					tempstring = ptszText;

				szMessage += tempstring;
			}
		}
		else if (!mir_strcmp(pszXmlns, JABBER_FEAT_DELAY) && msgTime == 0) {
			const char *ptszTimeStamp = XmlGetAttr(xNode, "stamp");
			if (ptszTimeStamp != nullptr)
				msgTime = JabberIsoToUnixTime(ptszTimeStamp);
		}
		else if (!mir_strcmp(pszXmlns, JABBER_FEAT_OOB2)) {
			auto *url = XmlGetChildText(xNode, "url");
			if (url != nullptr) {
				if (!szMessage.IsEmpty())
					szMessage.Append("\r\n");
				szMessage.Append(url);
			}
		}
		else if (!mir_strcmp(pszXmlns, JABBER_FEAT_MUC_USER)) {
			auto *inviteNode = XmlFirstChild(xNode, "invite");
			if (inviteNode != nullptr) {
				auto *inviteReason = XmlGetChildText(inviteNode, "reason");
				if (inviteReason == nullptr)
					inviteReason = szMessage;
				if (!m_bIgnoreMUCInvites)
					GroupchatProcessInvite(from, XmlGetAttr(inviteNode, "from"), inviteReason, XmlGetChildText(xNode, "password"));
				return;
			}
		}
		else if (!mir_strcmp(pszXmlns, JABBER_FEAT_ROSTER_EXCHANGE) && item != nullptr && (item->subscription == SUB_BOTH || item->subscription == SUB_TO)) {
			char chkJID[JABBER_MAX_JID_LEN] = "@";
			JabberStripJid(from, chkJID + 1, _countof(chkJID) - 1);
			for (auto *iNode : TiXmlFilter(xNode, "item")) {
				const char *action = XmlGetAttr(iNode, "action");
				const char *jid = XmlGetAttr(iNode, "jid");
				const char *nick = XmlGetAttr(iNode, "name");
				auto *group = XmlGetChildText(iNode, "group");
				if (action && jid && strstr(jid, chkJID)) {
					if (!mir_strcmp(action, "add")) {
						MCONTACT cc = DBCreateContact(jid, nick, false, false);
						if (group)
							db_set_utf(cc, "CList", "Group", group);
					}
					else if (!mir_strcmp(action, "delete")) {
						MCONTACT cc = HContactFromJID(jid);
						if (cc)
							db_delete_contact(cc);
					}
				}
			}
		}
		else if (!mir_strcmp(pszXmlns, JABBER_FEAT_DIRECT_MUC_INVITE)) {
			auto *inviteReason = xNode->GetText();
			if (!inviteReason)
				inviteReason = szMessage;
			if (!m_bIgnoreMUCInvites)
				GroupchatProcessInvite(from, XmlGetAttr(xNode, "jid"), inviteReason, nullptr);
			return;
		}
	}

	szMessage += ExtractImage(node);

	// all service info was already processed
	if (szMessage.IsEmpty()) {
		debugLogA("empty message, returning");
		return;
	}

	// we ignore messages without server id either if MAM is enabled
	if ((info->jabberServerCaps & JABBER_CAPS_MAM) && m_iMamMode != 0 && szMsgId == nullptr) {
		debugLogA("MAM is enabled, but there's no stanza-id: ignoting a message");
		return;
	}

	szMessage.Replace("\n", "\r\n");

	if (item != nullptr) {
		if (pFromResource) {
			JABBER_RESOURCE_STATUS *pLast = item->m_pLastSeenResource;
			item->m_pLastSeenResource = pFromResource;
			if (item->resourceMode == RSMODE_LASTSEEN && pLast == pFromResource)
				UpdateMirVer(item);
		}
	}

	// Create a temporary contact, if needed
	if (hContact == 0)
		hContact = CreateTemporaryContact(from, chatItem);
	CallService(MS_PROTO_CONTACTISTYPING, hContact, PROTOTYPE_CONTACTTYPING_OFF);

	time_t now = time(0);
	if (!msgTime)
		msgTime = now;

	if (m_bFixIncorrectTimestamps && (msgTime > now || (msgTime < (time_t)JabberGetLastContactMessageTime(hContact))))
		msgTime = now;

	PROTORECVEVENT recv = {};
	if (bCreateRead)
		recv.flags |= PREF_CREATEREAD;
	if (bWasSent)
		recv.flags |= PREF_SENT;

	recv.timestamp = (DWORD)msgTime;
	recv.szMessage = szMessage.GetBuffer();
	recv.szMsgId = szMsgId;

	MEVENT hDbEVent = (MEVENT)ProtoChainRecvMsg(hContact, &recv);
	if (idStr)
		m_arChatMarks.insert(new CChatMark(hDbEVent, idStr, from));
}

// XEP-0115: Entity Capabilities
void CJabberProto::OnProcessPresenceCapabilites(const TiXmlElement *node, pResourceStatus &r)
{
	if (r == nullptr)
		return;

	// already filled up? ok
	if (r->m_pCaps != nullptr)
		return;

	const char *from = XmlGetAttr(node, "from");
	if (from == nullptr)
		return;

	auto *n = XmlGetChildByTag(node, "c", "xmlns", JABBER_FEAT_ENTITY_CAPS);
	if (n == nullptr)
		return;

	const char *szNode = XmlGetAttr(n, "node");
	const char *szVer = XmlGetAttr(n, "ver");
	const char *szExt = XmlGetAttr(n, "ext");
	if (szNode == nullptr || szVer == nullptr)
		return;

	const char *szHash = XmlGetAttr(n, "hash");
	if (szHash == nullptr) { // old version
		BYTE hashOut[MIR_SHA1_HASH_SIZE];
		mir_sha1_hash((BYTE*)szVer, mir_strlen(szVer), hashOut);

		char szHashOut[MIR_SHA1_HASH_SIZE*2 + 1];
		r->m_pCaps = g_clientCapsManager.GetPartialCaps(szNode, bin2hex(hashOut, _countof(hashOut), szHashOut));
		if (r->m_pCaps == nullptr) {
			r->m_pCaps = g_clientCapsManager.SetClientCaps(szNode, szHashOut, szVer, JABBER_RESOURCE_CAPS_UNINIT);
			RequestOldCapsInfo(r, from);
		}

		MCONTACT hContact = HContactFromJID(from);
		if (hContact)
			UpdateMirVer(hContact, r);
	}
	else {
		r->m_pCaps = g_clientCapsManager.GetPartialCaps(szNode, szVer);
		if (r->m_pCaps == nullptr) {
			r->m_pCaps = g_clientCapsManager.SetClientCaps(szNode, szVer, "", JABBER_RESOURCE_CAPS_UNINIT);
			GetResourceCapabilities(from, r);
		}
	}

	r->m_tszCapsExt = mir_strdup(szExt);
}

void CJabberProto::UpdateJidDbSettings(const char *jid)
{
	JABBER_LIST_ITEM *item = ListGetItemPtr(LIST_ROSTER, jid);
	if (item == nullptr)
		return;

	MCONTACT hContact = HContactFromJID(jid);
	if (hContact == 0)
		return;

	int status = ID_STATUS_OFFLINE;
	if (!item->arResources.getCount()) {
		// set offline only if jid has resources
		if (strchr(jid, '/') == nullptr)
			status = item->getTemp()->m_iStatus;
		if (item->getTemp()->m_szStatusMessage)
			db_set_utf(hContact, "CList", "StatusMsg", item->getTemp()->m_szStatusMessage);
		else
			db_unset(hContact, "CList", "StatusMsg");
	}

	// Determine status to show for the contact based on the remaining resources
	int nSelectedResource = -1;
	int nMaxPriority = -999; // -128...+127 valid range
	for (int i = 0; i < item->arResources.getCount(); i++) {
		pResourceStatus r(item->arResources[i]);
		if (r->m_iPriority > nMaxPriority) {
			nMaxPriority = r->m_iPriority;
			status = r->m_iStatus;
			nSelectedResource = i;
		}
		else if (r->m_iPriority == nMaxPriority) {
			if ((status = JabberCombineStatus(status, r->m_iStatus)) == r->m_iStatus)
				nSelectedResource = i;
		}
	}
	item->getTemp()->m_iStatus = status;
	if (nSelectedResource != -1) {
		pResourceStatus r(item->arResources[nSelectedResource]);
		debugLogA("JabberUpdateJidDbSettings: updating jid %s to rc %s", item->jid, r->m_szResourceName.get());
		if (r->m_szStatusMessage)
			db_set_utf(hContact, "CList", "StatusMsg", r->m_szStatusMessage);
		else
			db_unset(hContact, "CList", "StatusMsg");
		UpdateMirVer(hContact, r);
	}
	else delSetting(hContact, DBSETTING_DISPLAY_UID);

	if (strchr(jid, '@') != nullptr || m_bShowTransport == TRUE)
		if (getWord(hContact, "Status", ID_STATUS_OFFLINE) != status)
			setWord(hContact, "Status", (WORD)status);

	// remove x-status icon
	if (status == ID_STATUS_OFFLINE) {
		delSetting(hContact, DBSETTING_XSTATUSID);
		delSetting(hContact, DBSETTING_XSTATUSNAME);
		delSetting(hContact, DBSETTING_XSTATUSMSG);
	}

	MenuUpdateSrmmIcon(item);
}

void CJabberProto::OnProcessPresence(const TiXmlElement *node, ThreadData *info)
{
	if (!node || !node->Name() || mir_strcmp(node->Name(), "presence"))
		return;

	const char *from = XmlGetAttr(node, "from");
	if (from == nullptr)
		return;

	if (m_presenceManager.HandlePresencePermanent(node, info))
		return;

	if (ListGetItemPtr(LIST_CHATROOM, from)) {
		GroupchatProcessPresence(node);
		return;
	}

	MCONTACT hContact;
	bool bSelfPresence = false;
	char szBareFrom[JABBER_MAX_JID_LEN];
	JabberStripJid(from, szBareFrom, _countof(szBareFrom));
	char szBareOurJid[JABBER_MAX_JID_LEN];
	JabberStripJid(info->fullJID, szBareOurJid, _countof(szBareOurJid));

	if (!mir_strcmpi(szBareFrom, szBareOurJid))
		bSelfPresence = true;

	const char *type = XmlGetAttr(node, "type");
	if (type == nullptr || !mir_strcmp(type, "available")) {
		ptrA nick(JabberNickFromJID(from));
		if (nick == nullptr)
			return;

		if ((hContact = HContactFromJID(from)) == 0) {
			if (!mir_strcmpi(info->fullJID, from) || (!bSelfPresence && !ListGetItemPtr(LIST_ROSTER, from))) {
				debugLogA("SKIP Receive presence online from %s (who is not in my roster and not in list - skipping)", from);
				return;
			}
			hContact = DBCreateContact(from, nick, true, true);
		}
		if (!ListGetItemPtr(LIST_ROSTER, from)) {
			debugLogA("Receive presence online from %s (who is not in my roster)", from);
			ListAdd(LIST_ROSTER, from, hContact);
		}
		DBCheckIsTransportedContact(from, hContact);
		int status = ID_STATUS_ONLINE;
		if (auto *show = XmlGetChildText(node, "show")) {
			if (!mir_strcmp(show, "away")) status = ID_STATUS_AWAY;
			else if (!mir_strcmp(show, "xa")) status = ID_STATUS_NA;
			else if (!mir_strcmp(show, "dnd")) status = ID_STATUS_DND;
			else if (!mir_strcmp(show, "chat")) status = ID_STATUS_FREECHAT;
		}

		int idleTime = 0;
		if (auto *idle = XmlGetChildByTag(node, "idle", "xmlns", JABBER_FEAT_IDLE))
			if (auto *szSince = XmlGetAttr(idle, "since"))
				idleTime = str2time(szSince);

		int priority = XmlGetChildInt(node, "priority");
		const char *pszStatus = XmlGetChildText(node, "status");
		ListAddResource(LIST_ROSTER, from, status, pszStatus, priority);

		// XEP-0115: Entity Capabilities
		pResourceStatus r(ResourceInfoFromJID(from));
		if (r != nullptr) {
			if (idleTime)
				r->m_dwIdleStartTime = idleTime;
			OnProcessPresenceCapabilites(node, r);
		}

		UpdateJidDbSettings(from);

		if (strchr(from, '@') == nullptr) {
			UI_SAFE_NOTIFY(m_pDlgServiceDiscovery, WM_JABBER_TRANSPORT_REFRESH);
		}
		debugLogA("%s (%s) online, set contact status to %s", nick.get(), from, T2Utf(Clist_GetStatusModeDescription(status, 0)).get());

		if (m_bEnableAvatars) {
			bool bHasAvatar = false, bRemovedAvatar = false;

			debugLogA("Avatar enabled");
			for (auto *xNode : TiXmlFilter(node, "x")) {
				auto *pszNamespace = XmlGetAttr(xNode, "xmlns");
				if (!mir_strcmp(pszNamespace, "vcard-temp:x:update")) {
					auto *szPhoto = XmlGetChildText(xNode, "photo");
					if (szPhoto && !bHasAvatar) {
						if (mir_strlen(szPhoto)) {
							// no file - no saved hash
							wchar_t tszFileName[MAX_PATH];
							GetAvatarFileName(hContact, tszFileName, _countof(tszFileName));
							if (::_waccess(tszFileName, 0) != 0)
								delSetting(hContact, "AvatarHash");

							bHasAvatar = true;
							ptrA saved(getStringA(hContact, "AvatarHash"));
							if (saved == nullptr || mir_strcmp(saved, szPhoto)) {
								debugLogA("Avatar was changed, reloading");
								SendGetVcard(hContact);
								continue;
							}
						}
						else bRemovedAvatar = true;
					}
				}
				else if (!mir_strcmp(pszNamespace, "miranda:x:vcard")) {
					auto *txt = xNode->GetText();
					if (mir_strlen(txt)) {
						ptrA saved(getStringA(hContact, "VCardHash"));
						if (saved == nullptr || mir_strcmp(saved, txt)) {
							debugLogA("Vcard was changed, let's read it");
							setString(hContact, "VCardHash", txt);
							SendGetVcard(hContact);
						}
					}
				}
			}

			if (!bHasAvatar && bRemovedAvatar) {
				debugLogA("Has no avatar");
				if (!delSetting(hContact, "AvatarHash"))
					ProtoBroadcastAck(hContact, ACKTYPE_AVATAR, ACKRESULT_SUCCESS, nullptr);
			}
		}
		return;
	}

	if (!mir_strcmp(type, "unavailable")) {
		hContact = HContactFromJID(from);
		JABBER_LIST_ITEM *item = ListGetItemPtr(LIST_ROSTER, from);
		if (item != nullptr) {
			ListRemoveResource(LIST_ROSTER, from);

			hContact = HContactFromJID(from);
			if (hContact && !Contact_OnList(hContact)) {
				// remove selfcontact, if where is no more another resources
				if (item->arResources.getCount() == 1 && ResourceInfoFromJID(info->fullJID))
					ListRemoveResource(LIST_ROSTER, info->fullJID);
			}

			// set status only if no more available resources
			if (!item->arResources.getCount()) {
				item->getTemp()->m_iStatus = ID_STATUS_OFFLINE;
				item->getTemp()->m_szStatusMessage = mir_strdup(XmlGetChildText(node, "status"));
			}
		}
		else debugLogA("SKIP Receive presence offline from %s (who is not in my roster)", from);

		UpdateJidDbSettings(from);

		if (strchr(from, '@') == nullptr)
			UI_SAFE_NOTIFY(m_pDlgServiceDiscovery, WM_JABBER_TRANSPORT_REFRESH);

		DBCheckIsTransportedContact(from, hContact);
		return;
	}

	if (!mir_strcmp(type, "subscribe")) {
		if (hContact = HContactFromJID(from))
			AddDbPresenceEvent(hContact, JABBER_DB_EVENT_PRESENCE_SUBSCRIBE);

		ptrA szNick(JabberNickFromJID(from));
		auto *xNick = XmlGetChildByTag(node, "nick", "xmlns", JABBER_FEAT_NICK);
		if (xNick != nullptr) {
			const char *xszNick = xNick->GetText();
			if (xszNick != nullptr && *xszNick) {
				debugLogA("Grabbed nick from presence: %s", xszNick);
				szNick = mir_strdup(xszNick);
			}
		}

		// automatically send authorization allowed to agent/transport
		if (strchr(from, '@') == nullptr || m_bAutoAcceptAuthorization) {
			ListAdd(LIST_ROSTER, from, hContact);
			info->send(XmlNode("presence") << XATTR("to", from) << XATTR("type", "subscribed"));

			if (m_bAutoAdd == TRUE) {
				JABBER_LIST_ITEM *item = ListGetItemPtr(LIST_ROSTER, from);
				if (item == nullptr || (item->subscription != SUB_BOTH && item->subscription != SUB_TO)) {
					debugLogA("Try adding contact automatically jid = %s", from);
					if ((hContact = AddToListByJID(from, 0)) != 0) {
						if (item)
							item->hContact = hContact;
						setUString(hContact, "Nick", szNick);
						Contact_PutOnList(hContact);
					}
				}
			}
			RebuildInfoFrame();
		}
		else {
			debugLogA("%s (%s) requests authorization", szNick.get(), from);
			DBAddAuthRequest(from, szNick);
		}
		return;
	}

	if (!mir_strcmp(type, "unsubscribe"))
		if (hContact = HContactFromJID(from))
			AddDbPresenceEvent(hContact, JABBER_DB_EVENT_PRESENCE_UNSUBSCRIBE);

	if (!mir_strcmp(type, "unsubscribed"))
		if (hContact = HContactFromJID(from))
			AddDbPresenceEvent(hContact, JABBER_DB_EVENT_PRESENCE_UNSUBSCRIBED);

	if (!mir_strcmp(type, "error"))
		if (hContact = HContactFromJID(from))
			AddDbPresenceEvent(hContact, JABBER_DB_EVENT_PRESENCE_ERROR);

	if (!mir_strcmp(type, "subscribed")) {
		if (hContact = HContactFromJID(from))
			AddDbPresenceEvent(hContact, JABBER_DB_EVENT_PRESENCE_SUBSCRIBED);

		if (JABBER_LIST_ITEM *item = ListGetItemPtr(LIST_ROSTER, from)) {
			if (item->subscription == SUB_FROM) item->subscription = SUB_BOTH;
			else if (item->subscription == SUB_NONE) {
				item->subscription = SUB_TO;
				if (strchr(from, '@') == nullptr) {
					UI_SAFE_NOTIFY(m_pDlgServiceDiscovery, WM_JABBER_TRANSPORT_REFRESH);
				}
			}
			UpdateSubscriptionInfo(hContact, item);
		}
	}
}

bool CJabberProto::OnProcessJingle(const TiXmlElement *node)
{
	const char *type;
	auto *child = XmlGetChildByTag(node, "jingle", "xmlns", JABBER_FEAT_JINGLE);

	if (child) {
		if ((type = XmlGetAttr(node, "type")) == nullptr)
			return false;

		if ((!mir_strcmp(type, "get") || !mir_strcmp(type, "set"))) {
			const char *szAction = XmlGetAttr(child, "action");
			const char *idStr = XmlGetAttr(node, "id");
			const char *from = XmlGetAttr(node, "from");
			if (szAction && !mir_strcmp(szAction, "session-initiate")) {
				// if this is a Jingle 'session-initiate' and noone processed it yet, reply with "unsupported-applications"
				m_ThreadInfo->send(XmlNodeIq("result", idStr, from));

				XmlNodeIq iq("set", SerialNext(), from);
				TiXmlElement *jingleNode = iq << XCHILDNS("jingle", JABBER_FEAT_JINGLE);

				jingleNode << XATTR("action", "session-terminate");
				const char *szInitiator = XmlGetAttr(child, "initiator");
				if (szInitiator)
					jingleNode << XATTR("initiator", szInitiator);
				const char *szSid = XmlGetAttr(child, "sid");
				if (szSid)
					jingleNode << XATTR("sid", szSid);

				jingleNode << XCHILD("reason")
					<< XCHILD("unsupported-applications");
				m_ThreadInfo->send(iq);
				return true;
			}
			else {
				// if it's something else than 'session-initiate' and noone processed it yet, reply with "unknown-session"
				XmlNodeIq iq("error", idStr, from);
				TiXmlElement *errNode = iq << XCHILD("error");
				errNode << XATTR("type", "cancel");
				errNode << XCHILDNS("item-not-found", "urn:ietf:params:xml:ns:xmpp-stanzas");
				errNode << XCHILDNS("unknown-session", "urn:xmpp:jingle:errors:1");
				m_ThreadInfo->send(iq);
				return true;
			}
		}
	}
	return false;
}

void CJabberProto::OnProcessIq(const TiXmlElement *node)
{
	if (!node->Name() || mir_strcmp(node->Name(), "iq"))
		return;

	const char *type;
	if ((type = XmlGetAttr(node, "type")) == nullptr)
		return;

	int id = JabberGetPacketID(node);

	// new match by id
	if (m_iqManager.HandleIq(id, node))
		return;

	// new iq handler engine
	if (m_iqManager.HandleIqPermanent(node))
		return;

	// Jingle support
	if (OnProcessJingle(node))
		return;

	// RECVED: <iq type='error'> ...
	if (!mir_strcmp(type, "error")) {
		char tszBuf[20];
		_itoa(id, tszBuf, 10);

		debugLogA("XXX on entry");
		// Check for file transfer deny by comparing idStr with ft->iqId
		LISTFOREACH(i, this, LIST_FILE)
		{
			JABBER_LIST_ITEM *item = ListGetItemPtrFromIndex(i);
			if (item->ft != nullptr && item->ft->state == FT_CONNECTING && !mir_strcmp(tszBuf, item->ft->szId)) {
				debugLogA("Denying file sending request");
				item->ft->state = FT_DENIED;
				if (item->ft->hFileEvent != nullptr)
					SetEvent(item->ft->hFileEvent);	// Simulate the termination of file server connection
			}
		}
	}
	else if ((!mir_strcmp(type, "get") || !mir_strcmp(type, "set"))) {
		XmlNodeIq iq("error", XmlGetAttr(node, "id"), XmlGetAttr(node, "from"));

		auto *pFirstChild = XmlFirstChild(node);
		if (pFirstChild)
			iq += pFirstChild;

		iq << XCHILD("error") << XATTR("type", "cancel")
			<< XCHILDNS("service-unavailable", "urn:ietf:params:xml:ns:xmpp-stanzas");
		m_ThreadInfo->send(iq);
	}
}

void CJabberProto::CancelRegConfig(CJabberFormDlg*, void*)
{
	if (g_pRegInfo)
		g_pRegInfo->conn.SetProgress(100, TranslateT("Registration canceled"));
}

void CJabberProto::SetRegConfig(CJabberFormDlg *pDlg, void *from)
{
	if (g_pRegInfo) {
		iqIdRegSetReg = SerialNext();

		char text[MAX_PATH];
		mir_snprintf(text, "%s@%s", g_pRegInfo->conn.username, g_pRegInfo->conn.server);
		XmlNodeIq iq("set", iqIdRegSetReg, (const char*)from);
		iq << XATTR("from", text);
		TiXmlElement *query = iq << XQUERY(JABBER_FEAT_REGISTER);
		pDlg->GetData(query);
		g_pRegInfo->send(iq);
	}
}

void CJabberProto::OnProcessRegIq(const TiXmlElement *node, ThreadData *info)
{
	if (!node->Name() || mir_strcmp(node->Name(), "iq")) return;
	const char *type = XmlGetAttr(node, "type");
	if (type == nullptr)
		return;

	int id = JabberGetPacketID(node);

	if (!mir_strcmp(type, "result")) {
		auto *queryNode = XmlFirstChild(node, "query");
		if (queryNode != nullptr) {
			const char *str = XmlGetAttr(queryNode, "xmlns");
			if (!mir_strcmp(str, JABBER_FEAT_REGISTER)) {
				auto *xNode = XmlFirstChild(queryNode, "x");
				if (xNode != nullptr) {
					if (!mir_strcmp(XmlGetAttr(xNode, "xmlns"), JABBER_FEAT_DATA_FORMS)) {
						g_pRegInfo = info;

						auto *pDlg = new CJabberFormDlg(this, xNode, LPGEN("Register new user"), &CJabberProto::SetRegConfig, mir_strdup(XmlGetAttr(node, "from")));
						if (info->conn.pDlg)
							pDlg->SetParent(((CDlgBase*)info->conn.pDlg)->GetHwnd());
						pDlg->SetCancel(&CJabberProto::CancelRegConfig);
						pDlg->Display();
						return;
					}
				}
			}
		}
		
		// RECVED: result of the request for registration mechanism
		// ACTION: send account registration information
		if (id == iqIdRegGetReg) {
			iqIdRegSetReg = SerialNext();

			XmlNodeIq iq("set", iqIdRegSetReg);
			TiXmlElement *query = iq << XQUERY(JABBER_FEAT_REGISTER);
			query << XCHILD("password", info->conn.password);
			query << XCHILD("username", info->conn.username);
			info->send(iq);

			info->conn.SetProgress(75, TranslateT("Sending registration information..."));
		}
		// RECVED: result of the registration process
		// ACTION: account registration successful
		else if (id == iqIdRegSetReg) {
			info->send("</stream:stream>");
			info->conn.SetProgress(100, TranslateT("Registration successful"));
			info->reg_done = true;
		}
	}
	else if (!mir_strcmp(type, "error")) {
		info->conn.SetProgress(100, JabberErrorMsg(node));
		info->reg_done = true;
		info->send("</stream:stream>");
	}
}

/////////////////////////////////////////////////////////////////////////////////////////
// ThreadData constructor & destructor

ThreadData::ThreadData(CJabberProto *_pro, JABBER_CONN_DATA *param)
{
	memset(this, 0, sizeof(*this));

	resolveID = -1;
	proto = _pro;
	iomutex = CreateMutex(nullptr, FALSE, nullptr);

	if (param != nullptr) {
		bIsReg = true;
		memcpy(&conn, param, sizeof(conn));
	}
}

ThreadData::~ThreadData()
{
	if (!bIsReg && proto->m_ThreadInfo == this)
		proto->m_ThreadInfo = nullptr;

	mir_free(gssapiHostName);
	mir_free(zRecvData);
	mir_free(buffer);

	CloseHandle(iomutex);
}

void ThreadData::close(void)
{
	if (s) {
		Netlib_CloseHandle(s);
		s = nullptr;
	}
}

void ThreadData::shutdown(void)
{
	if (s)
		Netlib_Shutdown(s);
}

int ThreadData::recvws(char* buf, size_t len, int flags)
{
	if (this == nullptr)
		return 0;

	return proto->WsRecv(s, buf, (int)len, flags);
}

int ThreadData::recv(char* buf, size_t len)
{
	if (useZlib)
		return zlibRecv(buf, (long)len);

	return recvws(buf, len, MSG_DUMPASTEXT);
}

int ThreadData::sendws(char* buf, size_t bufsize, int flags)
{
	return proto->WsSend(s, buf, (int)bufsize, flags);
}

int ThreadData::send(char* buf, int bufsize)
{
	if (this == nullptr)
		return 0;

	if (bufsize == -1)
		bufsize = (int)mir_strlen(buf);

	WaitForSingleObject(iomutex, 6000);

	int result;
	if (useZlib)
		result = zlibSend(buf, bufsize);
	else
		result = sendws(buf, bufsize, MSG_DUMPASTEXT);

	ReleaseMutex(iomutex);

	return result;
}

// Caution: DO NOT use ->send() to send binary (non-string) data
int ThreadData::send(TiXmlElement *node)
{
	if (this == nullptr || node == nullptr)
		return 0;

	while (auto *parent = node->Parent()) {
		if (parent->ToDocument())
			break;
		node = parent->ToElement();
	}

	if (proto->m_bEnableStreamMgmt)
		proto->m_StrmMgmt.HandleOutgoingNode(node); //TODO: is this a correct place ?, looks like some nodes does not goes here...

	return send_no_strm_mgmt(node);
}

// this function required for send <r/>, <a/> and more important, for resend stuck nodes by strm_mgmt (xep-0198)
int ThreadData::send_no_strm_mgmt(TiXmlElement *node)
{
	if (proto->m_sendManager.HandleSendPermanent(node, this))
		return 0;

	proto->OnConsoleProcessXml(node, JCPF_OUT);

	tinyxml2::XMLPrinter printer(0, true);
	node->GetDocument()->Print(&printer);
	CMStringA buf(printer.CStr());

	// strip forbidden control characters from outgoing XML stream
	char *q = buf.GetBuffer();
	for (char *p = buf.GetBuffer(); *p; ++p) {
		int c = *(BYTE*)p;
		if (c < 32 && c != '\t' && c != '\n' && c != '\r')
			continue;

		*q++ = *p;
	}
	*q = 0;

	return send(buf.GetBuffer(), int(q-buf.GetBuffer()));
}