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/*
Jabber Protocol Plugin for Miranda NG
Copyright (c) 2018 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 "jabber_strm_mgmt.h"
strm_mgmt::strm_mgmt(CJabberProto *_proto) : proto(_proto), m_bStrmMgmtPendingEnable(false),
m_bStrmMgmtEnabled(false),
m_bStrmMgmtResumeSupported(false),
bSessionResumed(false)
{
}
void strm_mgmt::OnProcessEnabled(HXML node, ThreadData * /*info*/)
{
m_bStrmMgmtEnabled = true;
auto val = XmlGetAttrValue(node, L"max");
if(val)
m_nStrmMgmtResumeMaxSeconds = _wtoi(val);
val = XmlGetAttrValue(node, L"resume");
if (val)
{
if (mir_wstrcmp(val, L"true") || mir_wstrcmp(val, L"1"))
{
m_bStrmMgmtResumeSupported = true;
m_sStrmMgmtResumeId = XmlGetAttrValue(node, L"id");
}
}
//TODO: handle 'location'
m_nStrmMgmtLocalHCount = 0;
m_nStrmMgmtSrvHCount = 0;
}
void strm_mgmt::OnProcessResumed(HXML node, ThreadData * /*info*/)
{
if (!mir_wstrcmp(XmlGetAttrValue(node, L"xmlns"), L"urn:xmpp:sm:3"))
{
auto var = XmlGetAttrValue(node, L"previd");
if (!var)
return;
if (m_sStrmMgmtResumeId != var)
return; //TODO: unknown session, what we should do ?
var = XmlGetAttrValue(node, L"h");
if (!var)
return;
bSessionResumed = true;
m_nStrmMgmtSrvHCount = _wtoi(var);
int size = m_nStrmMgmtLocalSCount - m_nStrmMgmtSrvHCount;
if (size < 0)
{
//TODO: this should never happen, indicates server side bug
//TODO: once our client side implementation good enough, abort stream in this case, noop for now
}
else if (size > 0 && !NodeCache.empty()) //TODO: NodeCache cannot be empty if size >0, it's a bug
ResendNodes(size);
else
{
for (auto i : NodeCache)
xmlFree(i);
NodeCache.clear();
}
}
}
void strm_mgmt::OnProcessSMa(HXML node)
{
if (!mir_wstrcmp(XmlGetAttrValue(node, L"xmlns"), L"urn:xmpp:sm:3"))
{
auto val = XmlGetAttrValue(node, L"h");
m_nStrmMgmtSrvHCount = _wtoi(val);
int size = m_nStrmMgmtLocalSCount - m_nStrmMgmtSrvHCount;
if (size < 0)
{
//TODO: this should never happen, indicates server side bug
//TODO: once our client side implementation good enough, abort stream in this case, noop for now
}
else if (size > 0 && !NodeCache.empty()) //TODO: NodeCache cannot be empty if size >0, it's a bug
ResendNodes(size);
else
{
for (auto i : NodeCache)
xmlFree(i);
NodeCache.clear();
}
}
}
void strm_mgmt::ResendNodes(uint32_t size)
{
if (size < NodeCache.size())
{
const size_t diff = NodeCache.size() - size;
if (diff)
{
size_t diff_tmp = diff;
for (auto i : NodeCache)
{
if (diff_tmp > 0)
{
xmlFree(i);
diff_tmp--;
}
}
diff_tmp = diff;
while (diff_tmp)
{
NodeCache.pop_front();
diff_tmp--;
}
}
}
std::list<HXML> tmp_list = NodeCache;
NodeCache.clear();
for (auto i : tmp_list)
{
proto->m_ThreadInfo->send_no_strm_mgmt(i); //freed by send ?
//xmlFree(i);
}
}
void strm_mgmt::OnProcessSMr(HXML node)
{
if (!mir_wstrcmp(XmlGetAttrValue(node, L"xmlns"), L"urn:xmpp:sm:3"))
SendAck();
}
void strm_mgmt::OnProcessFailed(HXML node, ThreadData * /*info*/) //used failed instead of failure, notes: https://xmpp.org/extensions/xep-0198.html#errors
{
if (!mir_wstrcmp(XmlGetAttrValue(node, L"xmlns"), L"urn:xmpp:sm:3"))
{
m_bStrmMgmtEnabled = false;
bSessionResumed = false;
m_sStrmMgmtResumeId.clear();
EnableStrmMgmt(); //resume failed, try to enable strm_mgmt instead
}
}
void strm_mgmt::CheckStreamFeatures(HXML node)
{
if (!mir_wstrcmp(XmlGetName(node), L"sm"))
{
if (!mir_wstrcmp(XmlGetAttrValue(node, L"xmlns"), L"urn:xmpp:sm:3")) //we work only with version 3 or higher of sm
{
if (!(proto->m_bJabberOnline))
m_bStrmMgmtPendingEnable = true;
else
EnableStrmMgmt();
}
}
}
void strm_mgmt::CheckState()
{
if (m_bStrmMgmtPendingEnable)
EnableStrmMgmt();
//TODO: resume stream from here ?
}
void strm_mgmt::HandleOutgoingNode(HXML node)
{
if (!m_bStrmMgmtEnabled)
return;
m_nStrmMgmtLocalSCount++;
NodeCache.push_back(xmlCopyNode(node));
if ((m_nStrmMgmtLocalSCount - m_nStrmMgmtSrvHCount) >= m_nStrmMgmtCacheSize)
RequestAck();
}
void strm_mgmt::OnDisconnect()
{
//TODO: following should be redone once resumption implemented
//reset state of stream management
m_bStrmMgmtEnabled = false;
m_bStrmMgmtPendingEnable = false;
//reset stream management h counters
m_nStrmMgmtLocalHCount = m_nStrmMgmtLocalSCount = m_nStrmMgmtSrvHCount = 0;
}
void strm_mgmt::HandleIncommingNode(HXML node)
{
if (m_bStrmMgmtEnabled && mir_wstrcmp(XmlGetName(node), L"r") && mir_wstrcmp(XmlGetName(node), L"a")) //TODO: something better
m_nStrmMgmtLocalHCount++;
else if (!mir_wstrcmp(XmlGetName(node), L"r"))
OnProcessSMr(node);
else if (!mir_wstrcmp(XmlGetName(node), L"a"))
OnProcessSMa(node);
}
void strm_mgmt::EnableStrmMgmt()
{
if (m_sStrmMgmtResumeId.empty())
{
XmlNode enable_sm(L"enable");
XmlAddAttr(enable_sm, L"xmlns", L"urn:xmpp:sm:3");
XmlAddAttr(enable_sm, L"resume", L"true"); //enable resumption (most useful part of this xep)
proto->m_ThreadInfo->send(enable_sm);
m_nStrmMgmtLocalSCount = 1; //TODO: this MUST be 0, i have bug somewhere.
}
else //resume session
{
XmlNode enable_sm(L"resume");
XmlAddAttr(enable_sm, L"xmlns", L"urn:xmpp:sm:3");
xmlAddAttrInt(enable_sm, L"h", m_nStrmMgmtLocalHCount);
XmlAddAttr(enable_sm, L"previd", m_sStrmMgmtResumeId.c_str());
proto->m_ThreadInfo->send(enable_sm);
}
}
void strm_mgmt::SendAck()
{
if (!m_bStrmMgmtEnabled)
return;
XmlNode enable_sm(L"a");
XmlAddAttr(enable_sm, L"xmlns", L"urn:xmpp:sm:3");
xmlAddAttrInt(enable_sm, L"h", m_nStrmMgmtLocalHCount);
proto->m_ThreadInfo->send_no_strm_mgmt(enable_sm);
}
void strm_mgmt::RequestAck()
{
if (m_bStrmMgmtEnabled)
{
XmlNode enable_sm(L"r");
XmlAddAttr(enable_sm, L"xmlns", L"urn:xmpp:sm:3");
proto->m_ThreadInfo->send_no_strm_mgmt(enable_sm);
}
}
bool strm_mgmt::IsSessionResumed()
{
return bSessionResumed;
}
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