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RetroShare/libretroshare/src/chat/distributedchat.cc

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/*
* libretroshare/src/chat: distributedchat.cc
*
* Services for RetroShare.
*
* Copyright 2014 by Cyril Soler
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License Version 2 as published by the Free Software Foundation.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA.
*
* Please report all bugs and problems to "csoler@users.sourceforge.net".
*
*/
#include <sstream>
#include <math.h>
#include <unistd.h>
#include "util/rsprint.h"
#include "util/rsmemory.h"
#include "distributedchat.h"
#include "pqi/p3historymgr.h"
#include "retroshare/rspeers.h"
#include "retroshare/rsiface.h"
#include "retroshare/rsidentity.h"
#include "rsserver/p3face.h"
#include "gxs/rsgixs.h"
#include "services/p3idservice.h"
//#define DEBUG_CHAT_LOBBIES 1
static const int CONNECTION_CHALLENGE_MAX_COUNT = 20 ; // sends a connection challenge every 20 messages
static const time_t CONNECTION_CHALLENGE_MAX_MSG_AGE = 30 ; // maximum age of a message to be used in a connection challenge
static const int CONNECTION_CHALLENGE_MIN_DELAY = 15 ; // sends a connection at most every 15 seconds
static const int LOBBY_CACHE_CLEANING_PERIOD = 10 ; // clean lobby caches every 10 secs (remove old messages)
static const time_t MAX_KEEP_MSG_RECORD = 1200 ; // keep msg record for 1200 secs max.
static const time_t MAX_KEEP_INACTIVE_NICKNAME = 180 ; // keep inactive nicknames for 3 mn max.
static const time_t MAX_DELAY_BETWEEN_LOBBY_KEEP_ALIVE = 120 ; // send keep alive packet every 2 minutes.
static const time_t MAX_KEEP_PUBLIC_LOBBY_RECORD = 60 ; // keep inactive lobbies records for 60 secs max.
static const time_t MIN_DELAY_BETWEEN_PUBLIC_LOBBY_REQ = 20 ; // don't ask for lobby list more than once every 30 secs.
static const time_t LOBBY_LIST_AUTO_UPDATE_TIME = 121 ; // regularly ask for available lobbies every 5 minutes, to allow auto-subscribe to work
static const uint32_t MAX_ALLOWED_LOBBIES_IN_LIST_WARNING = 50 ;
static const uint32_t MAX_MESSAGES_PER_SECONDS_NUMBER = 5 ; // max number of messages from a given peer in a window for duration below
static const uint32_t MAX_MESSAGES_PER_SECONDS_PERIOD = 10 ; // duration window for max number of messages before messages get dropped.
#define IS_PUBLIC_LOBBY(flags) (flags & RS_CHAT_LOBBY_FLAGS_PUBLIC )
#define IS_ANONYMOUS_LOBBY(flags) (flags & RS_CHAT_LOBBY_FLAGS_ANONYMOUS)
#define IS_CONNEXION_CHALLENGE(flags) (flags & RS_CHAT_LOBBY_FLAGS_CHALLENGE)
#define EXTRACT_PRIVACY_FLAGS(flags) (ChatLobbyFlags(flags.toUInt32()) & RS_CHAT_LOBBY_FLAGS_PUBLIC)
DistributedChatService::DistributedChatService(uint32_t serv_type,p3ServiceControl *sc,p3HistoryMgr *hm, RsGixs *is)
: mServType(serv_type),mDistributedChatMtx("Distributed Chat"), mServControl(sc), mHistMgr(hm),mGixs(is)
{
_time_shift_average = 0.0f ;
_should_reset_lobby_counts = false ;
last_visible_lobby_info_request_time = 0 ;
}
void DistributedChatService::flush()
{
static time_t last_clean_time_lobby = 0 ;
static time_t last_req_chat_lobby_list = 0 ;
time_t now = time(NULL) ;
if(last_clean_time_lobby + LOBBY_CACHE_CLEANING_PERIOD < now)
{
cleanLobbyCaches() ;
last_clean_time_lobby = now ;
// also make sure that the default identity is not null
if(_default_identity.isNull())
{
std::list<RsGxsId> ids ;
mGixs->getOwnIds(ids) ;
if(!ids.empty())
{
_default_identity = ids.front() ;
triggerConfigSave() ;
}
}
}
if(last_req_chat_lobby_list + LOBBY_LIST_AUTO_UPDATE_TIME < now)
{
std::vector<VisibleChatLobbyRecord> visible_lobbies_tmp ;
getListOfNearbyChatLobbies(visible_lobbies_tmp) ;
if (visible_lobbies_tmp.empty()){
last_req_chat_lobby_list = now-LOBBY_LIST_AUTO_UPDATE_TIME+MIN_DELAY_BETWEEN_PUBLIC_LOBBY_REQ;
} else {
last_req_chat_lobby_list = now ;
}
}
}
bool DistributedChatService::handleRecvChatLobbyMsgItem(RsChatMsgItem *ci)
{
// check if it's a lobby msg, in which case we replace the peer id by the lobby's virtual peer id.
//
RsChatLobbyMsgItem *cli = dynamic_cast<RsChatLobbyMsgItem*>(ci) ;
if(cli == NULL)
return true ; // the item is handled correctly if it's not a lobby item ;-)
time_t now = time(NULL) ;
if(now+100 > (time_t) cli->sendTime + MAX_KEEP_MSG_RECORD) // the message is older than the max cache keep plus 100 seconds ! It's too old, and is going to make an echo!
{
std::cerr << "Received severely outdated lobby event item (" << now - (time_t)cli->sendTime << " in the past)! Dropping it!" << std::endl;
std::cerr << "Message item is:" << std::endl;
cli->print(std::cerr) ;
std::cerr << std::endl;
return false ;
}
if(now+600 < (time_t) cli->sendTime) // the message is from the future. Drop it. more than 10 minutes
{
std::cerr << "Received event item from the future (" << (time_t)cli->sendTime - now << " seconds in the future)! Dropping it!" << std::endl;
std::cerr << "Message item is:" << std::endl;
cli->print(std::cerr) ;
std::cerr << std::endl;
return false ;
}
if(!checkSignature(cli,cli->PeerId())) // check the object's signature and possibly request missing keys
{
std::cerr << "Signature mismatched for this lobby event item. Item will be dropped: " << std::endl;
cli->print(std::cerr) ;
std::cerr << std::endl;
return false;
}
if(!bounceLobbyObject(cli,cli->PeerId())) // forwards the message to friends, keeps track of subscribers, etc.
return false;
// setup the peer id to the virtual peer id of the lobby.
//
RsPeerId virtual_peer_id ;
getVirtualPeerId(cli->lobby_id,virtual_peer_id) ;
cli->PeerId(virtual_peer_id) ;
//name = cli->nick;
//popupChatFlag = RS_POPUP_CHATLOBBY;
RsServer::notify()->AddPopupMessage(RS_POPUP_CHATLOBBY, cli->signature.keyId.toStdString(), cli->nick, cli->message); /* notify private chat message */
return true ;
}
bool DistributedChatService::checkSignature(RsChatLobbyBouncingObject *obj,const RsPeerId& peer_id)
{
// Always request the key. If not present, it will be asked to the peer id who sent this item.
std::list<RsPeerId> peer_list ;
peer_list.push_back(peer_id) ;
// network pre-request key to allow message authentication.
mGixs->requestKey(obj->signature.keyId,peer_list);
uint32_t size = obj->signed_serial_size() ;
RsTemporaryMemory memory(size) ;
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << "Checking object signature: " << std::endl;
std::cerr << " signature id: " << obj->signature.keyId << std::endl;
#endif
if(!obj->serialise_signed_part(memory,size))
{
std::cerr << " (EE) Cannot serialise message item. " << std::endl;
return false ;
}
uint32_t error_status ;
if(!mGixs->validateData(memory,obj->signed_serial_size(),obj->signature,false,error_status))
{
bool res = false ;
switch(error_status)
{
case RsGixs::RS_GIXS_ERROR_KEY_NOT_AVAILABLE:
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << "(WW) Key is not is cache. Cannot verify." << std::endl;
#endif
res =true ;
break ;
case RsGixs::RS_GIXS_ERROR_SIGNATURE_MISMATCH: std::cerr << "(EE) Signature mismatch. Spoofing/MITM?." << std::endl;
res =false ;
break ;
default: break ;
}
return res;
}
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << " signature: CHECKS" << std::endl;
#endif
return true ;
}
bool DistributedChatService::getVirtualPeerId(const ChatLobbyId& id,ChatLobbyVirtualPeerId& vpid)
{
RsStackMutex stack(mDistributedChatMtx); /********** STACK LOCKED MTX ******/
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << "Was asked for virtual peer name of " << std::hex << id << std::dec<< std::endl;
#endif
std::map<ChatLobbyId,ChatLobbyEntry>::const_iterator it(_chat_lobbys.find(id)) ;
if(it == _chat_lobbys.end())
{
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << " not found!! " << std::endl;
#endif
return false ;
}
vpid = it->second.virtual_peer_id ;
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << " returning " << vpid << std::endl;
#endif
return true ;
}
void DistributedChatService::locked_printDebugInfo() const
{
std::cerr << "Recorded lobbies: " << std::endl;
time_t now = time(NULL) ;
for( std::map<ChatLobbyId,ChatLobbyEntry>::const_iterator it(_chat_lobbys.begin()) ;it!=_chat_lobbys.end();++it)
{
std::cerr << " Lobby id\t\t: " << std::hex << it->first << std::dec << std::endl;
std::cerr << " Lobby name\t\t: " << it->second.lobby_name << std::endl;
std::cerr << " Lobby topic\t\t: " << it->second.lobby_topic << std::endl;
std::cerr << " nick name\t\t: " << it->second.gxs_id << std::endl;
std::cerr << " Lobby type\t\t: " << ((IS_PUBLIC_LOBBY(it->second.lobby_flags))?"Public":"Private") << std::endl;
std::cerr << " Lobby policy\t\t: " << ((IS_ANONYMOUS_LOBBY(it->second.lobby_flags))?"Unsigned":"Signature required") << std::endl;
std::cerr << " Lobby peer id\t: " << it->second.virtual_peer_id << std::endl;
std::cerr << " Challenge count\t: " << it->second.connexion_challenge_count << std::endl;
std::cerr << " Last activity\t: " << now - it->second.last_activity << " seconds ago." << std::endl;
std::cerr << " Cached messages\t: " << it->second.msg_cache.size() << std::endl;
for(std::map<ChatLobbyMsgId,time_t>::const_iterator it2(it->second.msg_cache.begin());it2!=it->second.msg_cache.end();++it2)
std::cerr << " " << std::hex << it2->first << std::dec << " time=" << now - it2->second << " secs ago" << std::endl;
std::cerr << " Participating friends: " << std::endl;
for(std::set<RsPeerId>::const_iterator it2(it->second.participating_friends.begin());it2!=it->second.participating_friends.end();++it2)
std::cerr << " " << *it2 << std::endl;
std::cerr << " Participating nick names: " << std::endl;
for(std::map<RsGxsId,time_t>::const_iterator it2(it->second.gxs_ids.begin());it2!=it->second.gxs_ids.end();++it2)
std::cerr << " " << it2->first << ": " << now - it2->second << " secs ago" << std::endl;
}
std::cerr << "Recorded lobby names: " << std::endl;
for( std::map<RsPeerId,ChatLobbyId>::const_iterator it(_lobby_ids.begin()) ;it!=_lobby_ids.end();++it)
std::cerr << " \"" << it->first << "\" id = " << std::hex << it->second << std::dec << std::endl;
std::cerr << "Visible public lobbies: " << std::endl;
for( std::map<ChatLobbyId,VisibleChatLobbyRecord>::const_iterator it(_visible_lobbies.begin()) ;it!=_visible_lobbies.end();++it)
{
std::cerr << " " << std::hex << it->first << " name = " << std::dec << it->second.lobby_name << it->second.lobby_topic << std::endl;
for(std::set<RsPeerId>::const_iterator it2(it->second.participating_friends.begin());it2!=it->second.participating_friends.end();++it2)
std::cerr << " With friend: " << *it2 << std::endl;
}
std::cerr << "Chat lobby flags: " << std::endl;
for( std::map<ChatLobbyId,ChatLobbyFlags>::const_iterator it(_known_lobbies_flags.begin()) ;it!=_known_lobbies_flags.end();++it)
std::cerr << " \"" << std::hex << it->first << "\" flags = " << it->second << std::dec << std::endl;
}
bool DistributedChatService::isLobbyId(const RsPeerId& virtual_peer_id,ChatLobbyId& lobby_id)
{
RsStackMutex stack(mDistributedChatMtx); /********** STACK LOCKED MTX ******/
std::map<ChatLobbyVirtualPeerId,ChatLobbyId>::const_iterator it(_lobby_ids.find(virtual_peer_id)) ;
if(it != _lobby_ids.end())
{
lobby_id = it->second ;
return true ;
}
lobby_id = 0;
return false ;
}
bool DistributedChatService::locked_bouncingObjectCheck(RsChatLobbyBouncingObject *obj,const RsPeerId& peer_id,uint32_t lobby_count)
{
static std::map<std::string, std::list<time_t> > message_counts ;
std::ostringstream os ;
os << obj->lobby_id ;
std::string pid = peer_id.toStdString() + "_" + os.str() ;
// Check for the number of peers in the lobby. First look into visible lobbies, because the number
// of peers there is more accurate. If non existant (because it's a private lobby), take the count from
// the current lobby list.
//
std::map<ChatLobbyId,VisibleChatLobbyRecord>::const_iterator it = _visible_lobbies.find(obj->lobby_id) ;
if(it != _visible_lobbies.end())
lobby_count = it->second.total_number_of_peers ;
else
{
std::map<ChatLobbyId,ChatLobbyEntry>::const_iterator it = _chat_lobbys.find(obj->lobby_id) ;
if(it != _chat_lobbys.end())
lobby_count = it->second.gxs_ids.size() ;
else
{
std::cerr << "DistributedChatService::locked_bouncingObjectCheck(): weird situation: cannot find lobby in visible lobbies nor current lobbies. Dropping message. If you see this, contact the developers." << std::endl;
return false ;
}
}
// max objects per second: lobby_count * 1/MAX_DELAY_BETWEEN_LOBBY_KEEP_ALIVE objects per second.
// So in cache, there is in average that number times MAX_MESSAGES_PER_SECONDS_PERIOD
//
float max_cnt = std::max(10.0f, 4*lobby_count / (float)MAX_DELAY_BETWEEN_LOBBY_KEEP_ALIVE * MAX_MESSAGES_PER_SECONDS_PERIOD) ;
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << "lobby_count=" << lobby_count << std::endl;
std::cerr << "Got msg for peer " << pid << std::dec << ". Limit is " << max_cnt << ". List is " ;
for(std::list<time_t>::const_iterator it(message_counts[pid].begin());it!=message_counts[pid].end();++it)
std::cerr << *it << " " ;
std::cerr << std::endl;
#endif
time_t now = time(NULL) ;
std::list<time_t>& lst = message_counts[pid] ;
// Clean old messages time stamps from the list.
//
while(!lst.empty() && lst.front() + MAX_MESSAGES_PER_SECONDS_PERIOD < now)
lst.pop_front() ;
if(lst.size() > max_cnt)
{
std::cerr << "Too many messages from peer " << pid << ". Someone (name=" << obj->nick << ") is trying to flood this lobby. Message will not be forwarded." << std::endl;
return false;
}
else
lst.push_back(now) ;
return true ;
}
// This function should be used for all types of chat messages. But this requires a non backward compatible change in
// chat protocol. To be done for version 0.6
//
void DistributedChatService::checkSizeAndSendLobbyMessage(RsChatItem *msg)
{
// Multiple-parts messaging has been disabled in lobbies, because of the following issues:
// 1 - it breaks signatures because the subid of each sub-item is changed (can be fixed)
// 2 - it breaks (can be fixed as well)
// 3 - it is unreliable since items are not guarrantied to all arrive in the end (cannot be fixed)
// 4 - large objects can be used to corrupt end peers (cannot be fixed)
//
static const uint32_t MAX_ITEM_SIZE = 32000 ;
if(msg->serial_size() > MAX_ITEM_SIZE)
{
std::cerr << "(EE) Chat item exceeds maximum serial size. It will be dropped." << std::endl;
delete msg ;
}
sendChatItem(msg) ;
}
bool DistributedChatService::locked_checkAndRebuildPartialLobbyMessage(RsChatLobbyMsgItem *ci)
{
return true ;
}
bool DistributedChatService::handleRecvItem(RsChatItem *item)
{
switch(item->PacketSubType())
{
case RS_PKT_SUBTYPE_CHAT_LOBBY_SIGNED_EVENT: handleRecvChatLobbyEventItem (dynamic_cast<RsChatLobbyEventItem *>(item)) ; break ;
case RS_PKT_SUBTYPE_CHAT_LOBBY_INVITE: handleRecvLobbyInvite (dynamic_cast<RsChatLobbyInviteItem *>(item)) ; break ;
case RS_PKT_SUBTYPE_CHAT_LOBBY_CHALLENGE: handleConnectionChallenge (dynamic_cast<RsChatLobbyConnectChallengeItem *>(item)) ; break ;
case RS_PKT_SUBTYPE_CHAT_LOBBY_UNSUBSCRIBE: handleFriendUnsubscribeLobby (dynamic_cast<RsChatLobbyUnsubscribeItem *>(item)) ; break ;
case RS_PKT_SUBTYPE_CHAT_LOBBY_LIST_REQUEST: handleRecvChatLobbyListRequest (dynamic_cast<RsChatLobbyListRequestItem *>(item)) ; break ;
case RS_PKT_SUBTYPE_CHAT_LOBBY_LIST: handleRecvChatLobbyList (dynamic_cast<RsChatLobbyListItem *>(item)) ; break ;
default:
return false ;
}
return true ;
}
void DistributedChatService::handleRecvChatLobbyListRequest(RsChatLobbyListRequestItem *clr)
{
// make a lobby list item
//
RsChatLobbyListItem *item = new RsChatLobbyListItem;
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << "Peer " << clr->PeerId() << " requested the list of public chat lobbies." << std::endl;
#endif
{
RsStackMutex stack(mDistributedChatMtx); /********** STACK LOCKED MTX ******/
for(std::map<ChatLobbyId,ChatLobbyEntry>::const_iterator it(_chat_lobbys.begin());it!=_chat_lobbys.end();++it)
{
const ChatLobbyEntry& lobby(it->second) ;
if(IS_PUBLIC_LOBBY(lobby.lobby_flags) ||
(lobby.previously_known_peers.find(clr->PeerId()) != lobby.previously_known_peers.end()
||lobby.participating_friends.find(clr->PeerId()) != lobby.participating_friends.end()) )
{
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << " Adding lobby " << std::hex << it->first << std::dec << " \""
<< it->second.lobby_name << it->second.lobby_topic << "\" count=" << it->second.gxs_ids.size() << std::endl;
#endif
VisibleChatLobbyInfo info ;
info.id = it->first ;
info.name = it->second.lobby_name ;
info.topic = it->second.lobby_topic ;
info.count = it->second.gxs_ids.size() ;
info.flags = it->second.lobby_flags ;
item->lobbies.push_back(info) ;
}
#ifdef DEBUG_CHAT_LOBBIES
else
std::cerr << " Not adding private lobby " << std::hex << it->first << std::dec << std::endl ;
#endif
}
}
item->PeerId(clr->PeerId()) ;
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << " Sending list to " << clr->PeerId() << std::endl;
#endif
sendChatItem(item);
}
void DistributedChatService::handleRecvChatLobbyList(RsChatLobbyListItem *item)
{
if(item->lobbies.size() > MAX_ALLOWED_LOBBIES_IN_LIST_WARNING)
std::cerr << "Warning: Peer " << item->PeerId() << "(" << rsPeers->getPeerName(item->PeerId()) << ") is sending a lobby list of " << item->lobbies.size() << " lobbies. This is unusual, and probably a attempt to crash you." << std::endl;
std::list<ChatLobbyId> chatLobbyToSubscribe;
std::list<ChatLobbyId> invitationNeeded ;
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << "Received chat lobby list from friend " << item->PeerId() << ", " << item->lobbies.size() << " elements." << std::endl;
#endif
{
time_t now = time(NULL) ;
RsStackMutex stack(mDistributedChatMtx); /********** STACK LOCKED MTX ******/
for(uint32_t i=0;i<item->lobbies.size() && i < MAX_ALLOWED_LOBBIES_IN_LIST_WARNING;++i)
{
VisibleChatLobbyRecord& rec(_visible_lobbies[item->lobbies[i].id]) ;
rec.lobby_id = item->lobbies[i].id ;
rec.lobby_name = item->lobbies[i].name ;
rec.lobby_topic = item->lobbies[i].topic ;
rec.participating_friends.insert(item->PeerId()) ;
if(_should_reset_lobby_counts)
rec.total_number_of_peers = item->lobbies[i].count ;
else
rec.total_number_of_peers = std::max(rec.total_number_of_peers,item->lobbies[i].count) ;
rec.last_report_time = now ;
rec.lobby_flags = item->lobbies[i].flags ;
std::map<ChatLobbyId,ChatLobbyFlags>::const_iterator it(_known_lobbies_flags.find(item->lobbies[i].id)) ;
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << " lobby id " << std::hex << item->lobbies[i].id << std::dec << ", " << item->lobbies[i].name
<< ", " << item->lobbies[i].count << " participants" << std::endl;
#endif
if(it != _known_lobbies_flags.end() && (it->second & RS_CHAT_LOBBY_FLAGS_AUTO_SUBSCRIBE))
{
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << " lobby is flagged as autosubscribed. Adding it to subscribe list." << std::endl;
#endif
ChatLobbyId clid = item->lobbies[i].id;
chatLobbyToSubscribe.push_back(clid);
}
// for subscribed lobbies, check that item->PeerId() is among the participating friends. If not, add him!
std::map<ChatLobbyId,ChatLobbyEntry>::iterator it2 = _chat_lobbys.find(item->lobbies[i].id) ;
if(it2 != _chat_lobbys.end() && it2->second.participating_friends.find(item->PeerId()) == it2->second.participating_friends.end())
{
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << " lobby is currently subscribed but friend is not participating already -> adding to partipating friends and sending invite." << std::endl;
#endif
it2->second.participating_friends.insert(item->PeerId()) ;
invitationNeeded.push_back(item->lobbies[i].id) ;
}
}
}
std::list<ChatLobbyId>::iterator it;
for (it = chatLobbyToSubscribe.begin(); it != chatLobbyToSubscribe.end(); ++it)
joinVisibleChatLobby(*it,_default_identity);
for(std::list<ChatLobbyId>::const_iterator it = invitationNeeded.begin();it!=invitationNeeded.end();++it)
invitePeerToLobby(*it,item->PeerId(),false) ;
RsServer::notify()->notifyListChange(NOTIFY_LIST_CHAT_LOBBY_LIST, NOTIFY_TYPE_ADD) ;
_should_reset_lobby_counts = false ;
}
void DistributedChatService::addTimeShiftStatistics(int D)
{
static const int S = 50 ; // accuracy up to 2^50 second. Quite conservative!
static int total = 0 ;
static std::vector<int> log_delay_histogram(S,0) ;
int delay = (D<0)?(-D):D ;
if(delay < 0)
delay = -delay ;
// compute log2.
int l = 0 ;
while(delay > 0) delay >>= 1, ++l ;
int bin = std::min(S-1,l) ;
++log_delay_histogram[bin] ;
++total ;
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << "New delay stat item. delay=" << D << ", log=" << bin << " total=" << total << ", histogram = " ;
for(int i=0;i<S;++i)
std::cerr << log_delay_histogram[i] << " " ;
#endif
if(total > 30)
{
float t = 0.0f ;
int i=0 ;
for(;i<S && t<0.5*total;++i)
t += log_delay_histogram[i] ;
if(i == 0) return ; // cannot happen, since total>0 so i is incremented
if(log_delay_histogram[i-1] == 0) return ; // cannot happen, either, but let's be cautious.
float expected = ( i * (log_delay_histogram[i-1] - t + total*0.5) + (i-1) * (t - total*0.5) ) / (float)log_delay_histogram[i-1] - 1;
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << ". Expected delay: " << expected << std::endl ;
#endif
if(expected > 9) // if more than 20 samples
RsServer::notify()->notifyChatLobbyTimeShift( (int)pow(2.0f,expected)) ;
total = 0.0f ;
log_delay_histogram.clear() ;
log_delay_histogram.resize(S,0) ;
}
#ifdef DEBUG_CHAT_LOBBIES
else
std::cerr << std::endl;
#endif
}
void DistributedChatService::handleRecvChatLobbyEventItem(RsChatLobbyEventItem *item)
{
// delete items that are not for us, as early as possible.
{
RsStackMutex stack(mDistributedChatMtx); /********** STACK LOCKED MTX ******/
// send upward for display
if(_chat_lobbys.find(item->lobby_id) == _chat_lobbys.end())
{
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << "Chatlobby for id " << std::hex << item->lobby_id << " has no record. Dropping the msg." << std::dec << std::endl;
#endif
return ;
}
}
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << "Received ChatLobbyEvent item of type " << (int)(item->event_type) << ", and string=" << item->string1 << std::endl;
#endif
time_t now = time(NULL) ;
if(!checkSignature(item,item->PeerId())) // check the object's signature and possibly request missing keys
{
std::cerr << "Signature mismatched for this lobby event item: " << std::endl;
item->print(std::cerr) ;
std::cerr << std::endl;
return ;
}
addTimeShiftStatistics((int)now - (int)item->sendTime) ;
if(now+100 > (time_t) item->sendTime + MAX_KEEP_MSG_RECORD) // the message is older than the max cache keep minus 100 seconds ! It's too old, and is going to make an echo!
{
std::cerr << "Received severely outdated lobby event item (" << now - (time_t)item->sendTime << " in the past)! Dropping it!" << std::endl;
std::cerr << "Message item is:" << std::endl;
item->print(std::cerr) ;
std::cerr << std::endl;
return ;
}
if(now+600 < (time_t) item->sendTime) // the message is from the future more than 10 minutes
{
std::cerr << "Received event item from the future (" << (time_t)item->sendTime - now << " seconds in the future)! Dropping it!" << std::endl;
std::cerr << "Message item is:" << std::endl;
item->print(std::cerr) ;
std::cerr << std::endl;
return ;
}
if(! bounceLobbyObject(item,item->PeerId()))
return ;
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << " doing specific job for this status item." << std::endl;
#endif
if(item->event_type == RS_CHAT_LOBBY_EVENT_PEER_LEFT) // if a peer left. Remove its nickname from the list.
{
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << " removing nickname " << item->nick << " from lobby " << std::hex << item->lobby_id << std::dec << std::endl;
#endif
RsStackMutex stack(mDistributedChatMtx); /********** STACK LOCKED MTX ******/
std::map<ChatLobbyId,ChatLobbyEntry>::iterator it = _chat_lobbys.find(item->lobby_id) ;
if(it != _chat_lobbys.end())
{
std::map<RsGxsId,time_t>::iterator it2(it->second.gxs_ids.find(item->signature.keyId)) ;
if(it2 != it->second.gxs_ids.end())
{
it->second.gxs_ids.erase(it2) ;
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << " removed id " << item->signature.keyId << " from lobby " << std::hex << item->lobby_id << std::dec << std::endl;
#endif
}
#ifdef DEBUG_CHAT_LOBBIES
else
std::cerr << " (EE) nickname " << item->nick << " not in participant nicknames list!" << std::endl;
#endif
}
}
else if(item->event_type == RS_CHAT_LOBBY_EVENT_PEER_JOINED) // if a joined left. Add its nickname to the list.
{
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << " adding nickname " << item->nick << " to lobby " << std::hex << item->lobby_id << std::dec << std::endl;
#endif
RsStackMutex stack(mDistributedChatMtx); /********** STACK LOCKED MTX ******/
std::map<ChatLobbyId,ChatLobbyEntry>::iterator it = _chat_lobbys.find(item->lobby_id) ;
if(it != _chat_lobbys.end())
{
it->second.gxs_ids[item->signature.keyId] = time(NULL) ;
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << " added nickname " << item->nick << " from lobby " << std::hex << item->lobby_id << std::dec << std::endl;
#endif
}
}
else if(item->event_type == RS_CHAT_LOBBY_EVENT_KEEP_ALIVE) // keep alive packet.
{
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << " adding nickname " << item->nick << " to lobby " << std::hex << item->lobby_id << std::dec << std::endl;
#endif
RsStackMutex stack(mDistributedChatMtx); /********** STACK LOCKED MTX ******/
std::map<ChatLobbyId,ChatLobbyEntry>::iterator it = _chat_lobbys.find(item->lobby_id) ;
if(it != _chat_lobbys.end())
{
it->second.gxs_ids[item->signature.keyId] = time(NULL) ;
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << " added nickname " << item->nick << " from lobby " << std::hex << item->lobby_id << std::dec << std::endl;
#endif
}
}
RsServer::notify()->notifyChatLobbyEvent(item->lobby_id,item->event_type,item->signature.keyId.toStdString(),item->string1) ;
}
void DistributedChatService::getListOfNearbyChatLobbies(std::vector<VisibleChatLobbyRecord>& visible_lobbies)
{
{
RsStackMutex stack(mDistributedChatMtx); /********** STACK LOCKED MTX ******/
visible_lobbies.clear() ;
for(std::map<ChatLobbyId,VisibleChatLobbyRecord>::const_iterator it(_visible_lobbies.begin());it!=_visible_lobbies.end();++it)
visible_lobbies.push_back(it->second) ;
}
time_t now = time(NULL) ;
if(now > MIN_DELAY_BETWEEN_PUBLIC_LOBBY_REQ + last_visible_lobby_info_request_time)
{
std::set<RsPeerId> ids ;
mServControl->getPeersConnected(mServType, ids);
for(std::set<RsPeerId>::const_iterator it(ids.begin());it!=ids.end();++it)
{
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << " asking list of public lobbies to " << *it << std::endl;
#endif
RsChatLobbyListRequestItem *item = new RsChatLobbyListRequestItem ;
item->PeerId(*it) ;
sendChatItem(item);
}
last_visible_lobby_info_request_time = now ;
_should_reset_lobby_counts = true ;
}
}
// returns:
// true: the object is not a duplicate and should be used
// false: the object is a duplicate or there is an error, and it should be destroyed.
//
bool DistributedChatService::bounceLobbyObject(RsChatLobbyBouncingObject *item,const RsPeerId& peer_id)
{
time_t now = time(NULL) ;
RsStackMutex stack(mDistributedChatMtx); /********** STACK LOCKED MTX ******/
#ifdef DEBUG_CHAT_LOBBIES
locked_printDebugInfo() ; // debug
std::cerr << "Handling ChatLobbyMsg " << std::hex << item->msg_id << ", lobby id " << item->lobby_id << ", from peer id " << peer_id << std::endl;
#endif
// send upward for display
std::map<ChatLobbyId,ChatLobbyEntry>::iterator it(_chat_lobbys.find(item->lobby_id)) ;
if(it == _chat_lobbys.end())
{
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << "Chatlobby for id " << std::hex << item->lobby_id << " has no record. Dropping the msg." << std::dec << std::endl;
#endif
return false ;
}
ChatLobbyEntry& lobby(it->second) ;
// Adds the peer id to the list of friend participants, even if it's not original msg source
if(peer_id != mServControl->getOwnId())
lobby.participating_friends.insert(peer_id) ;
lobby.gxs_ids[item->signature.keyId] = now ;
// Checks wether the msg is already recorded or not
std::map<ChatLobbyMsgId,time_t>::iterator it2(lobby.msg_cache.find(item->msg_id)) ;
if(it2 != lobby.msg_cache.end()) // found!
{
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << " Msg already received at time " << it2->second << ". Dropping!" << std::endl ;
#endif
it2->second = now ; // update last msg seen time, to prevent echos.
return false ;
}
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << " Msg not received already. Adding in cache, and forwarding!" << std::endl ;
#endif
lobby.msg_cache[item->msg_id] = now ;
lobby.last_activity = now ;
// Check that if we have a lobby bouncing object, it's not flooding the lobby
if(!locked_bouncingObjectCheck(item,peer_id,lobby.participating_friends.size()))
return false;
// Forward to allparticipating friends, except this peer.
for(std::set<RsPeerId>::const_iterator it(lobby.participating_friends.begin());it!=lobby.participating_friends.end();++it)
if((*it)!=peer_id && mServControl->isPeerConnected(mServType, *it))
{
RsChatLobbyBouncingObject *obj2 = item->duplicate() ; // makes a copy
RsChatItem *item2 = dynamic_cast<RsChatItem*>(obj2) ;
assert(item2 != NULL) ;
item2->PeerId(*it) ; // replaces the virtual peer id with the actual destination.
checkSizeAndSendLobbyMessage(item2) ;
}
++lobby.connexion_challenge_count ;
return true ;
}
void DistributedChatService::sendLobbyStatusString(const ChatLobbyId& lobby_id,const std::string& status_string)
{
sendLobbyStatusItem(lobby_id,RS_CHAT_LOBBY_EVENT_PEER_STATUS,status_string) ;
}
/**
* Inform other Clients of a nickname change
*
* as example for updating their ChatLobby Blocklist for muted peers
* */
void DistributedChatService::sendLobbyStatusPeerChangedNickname(const ChatLobbyId& lobby_id, const std::string& newnick)
{
sendLobbyStatusItem(lobby_id,RS_CHAT_LOBBY_EVENT_PEER_CHANGE_NICKNAME, newnick) ;
}
void DistributedChatService::sendLobbyStatusPeerLiving(const ChatLobbyId& lobby_id)
{
sendLobbyStatusItem(lobby_id,RS_CHAT_LOBBY_EVENT_PEER_LEFT,std::string()) ;
}
void DistributedChatService::sendLobbyStatusNewPeer(const ChatLobbyId& lobby_id)
{
sendLobbyStatusItem(lobby_id,RS_CHAT_LOBBY_EVENT_PEER_JOINED,std::string()) ;
}
void DistributedChatService::sendLobbyStatusKeepAlive(const ChatLobbyId& lobby_id)
{
sendLobbyStatusItem(lobby_id,RS_CHAT_LOBBY_EVENT_KEEP_ALIVE,std::string()) ;
}
void DistributedChatService::sendLobbyStatusItem(const ChatLobbyId& lobby_id,int type,const std::string& status_string)
{
RsChatLobbyEventItem item ;
{
RsStackMutex stack(mDistributedChatMtx); /********** STACK LOCKED MTX ******/
item.event_type = type ;
item.string1 = status_string ;
item.sendTime = time(NULL) ;
if(! locked_initLobbyBouncableObject(lobby_id,item))
return ;
}
RsPeerId ownId = mServControl->getOwnId();
bounceLobbyObject(&item,ownId) ;
}
bool DistributedChatService::locked_initLobbyBouncableObject(const ChatLobbyId& lobby_id,RsChatLobbyBouncingObject& item)
{
// get a pointer to the info for that chat lobby.
//
std::map<ChatLobbyId,ChatLobbyEntry>::iterator it(_chat_lobbys.find(lobby_id)) ;
if(it == _chat_lobbys.end())
{
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << "Chatlobby for id " << std::hex << lobby_id << " has no record. This is a serious error!!" << std::dec << std::endl;
#endif
return false;
}
ChatLobbyEntry& lobby(it->second) ;
// chat lobby stuff
//
do
{
item.msg_id = RSRandom::random_u64();
}
while( lobby.msg_cache.find(item.msg_id) != lobby.msg_cache.end() ) ;
RsIdentityDetails details ;
if(!rsIdentity->getIdDetails(lobby.gxs_id,details))
{
std::cerr << "(EE) Cannot send chat lobby object. Signign identity " << lobby.gxs_id << " is unknown." << std::endl;
return false ;
}
item.lobby_id = lobby_id ;
item.nick = details.mNickname ;
item.signature.TlvClear() ;
item.signature.keyId = lobby.gxs_id ;
// now sign the object, if the lobby expects it
if(!IS_ANONYMOUS_LOBBY(lobby.lobby_flags))
{
uint32_t size = item.signed_serial_size() ;
unsigned char *memory = (unsigned char *)malloc(size) ;
if(!item.serialise_signed_part(memory,size))
{
std::cerr << "(EE) Cannot sign message item. " << std::endl;
return false ;
}
uint32_t error_status ;
if(!mGixs->signData(memory,size,lobby.gxs_id,item.signature,error_status))
{
switch(error_status)
{
case RsGixs::RS_GIXS_ERROR_KEY_NOT_AVAILABLE: std::cerr << "(EE) Cannot sign item: key not available for ID " << lobby.gxs_id << std::endl;
break ;
default: std::cerr << "(EE) Cannot sign item: unknown error" << std::endl;
break ;
}
free(memory) ;
return false ;
}
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << " signature done." << std::endl;
// check signature
if(!mGixs->validateData(memory,item.signed_serial_size(),item.signature,true,error_status))
{
std::cerr << "(EE) Cannot check message item. " << std::endl;
return false ;
}
std::cerr << " signature checks!" << std::endl;
std::cerr << " Item dump:" << std::endl;
item.print(std::cerr,2) ;
#endif
free(memory) ;
}
return true ;
}
bool DistributedChatService::sendLobbyChat(const ChatLobbyId& lobby_id, const std::string& msg)
{
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << "Sending chat lobby message to lobby " << std::hex << lobby_id << std::dec << std::endl;
std::cerr << "msg:" << std::endl;
std::cerr << msg << std::endl;
#endif
RsChatLobbyMsgItem item ;
{
RsStackMutex stack(mDistributedChatMtx); /********** STACK LOCKED MTX ******/
// chat msg stuff
//
item.chatFlags = RS_CHAT_FLAG_LOBBY | RS_CHAT_FLAG_PRIVATE;
item.sendTime = time(NULL);
item.recvTime = item.sendTime;
item.message = msg;
item.parent_msg_id = 0;
// gives a random msg id, setup the nickname, and signs the item.
if(! locked_initLobbyBouncableObject(lobby_id,item))
return false;
}
RsPeerId ownId = rsPeers->getOwnId();
bounceLobbyObject(&item, ownId) ;
ChatMessage message;
message.chatflags = 0;
message.chat_id = ChatId(lobby_id);
message.msg = msg;
message.lobby_peer_gxs_id = item.signature.keyId;
message.recvTime = item.recvTime;
message.sendTime = item.sendTime;
message.incoming = false;
message.online = true;
RsServer::notify()->notifyChatMessage(message);
mHistMgr->addMessage(message);
return true ;
}
void DistributedChatService::handleConnectionChallenge(RsChatLobbyConnectChallengeItem *item)
{
// Look into message cache of all lobbys to handle the challenge.
//
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << "DistributedChatService::handleConnectionChallenge(): received connection challenge:" << std::endl;
std::cerr << " Challenge code = 0x" << std::hex << item->challenge_code << std::dec << std::endl;
std::cerr << " Peer Id = " << item->PeerId() << std::endl;
#endif
time_t now = time(NULL) ;
ChatLobbyId lobby_id ;
const RsPeerId& ownId = rsPeers->getOwnId();
bool found = false ;
{
RsStackMutex stack(mDistributedChatMtx); /********** STACK LOCKED MTX ******/
for(std::map<ChatLobbyId,ChatLobbyEntry>::iterator it(_chat_lobbys.begin());it!=_chat_lobbys.end() && !found;++it)
for(std::map<ChatLobbyMsgId,time_t>::const_iterator it2(it->second.msg_cache.begin());it2!=it->second.msg_cache.end() && !found;++it2)
if(it2->second + CONNECTION_CHALLENGE_MAX_MSG_AGE + 5 > now) // any msg not older than 5 seconds plus max challenge count is fine.
{
uint64_t code = makeConnexionChallengeCode(ownId,it->first,it2->first) ;
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << " Lobby_id = 0x" << std::hex << it->first << ", msg_id = 0x" << it2->first << ": code = 0x" << code << std::dec << std::endl ;
#endif
if(code == item->challenge_code)
{
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << " Challenge accepted for lobby " << std::hex << it->first << ", for chat msg " << it2->first << std::dec << std::endl ;
std::cerr << " Sending connection request to peer " << item->PeerId() << std::endl;
#endif
lobby_id = it->first ;
found = true ;
// also add the peer to the list of participating friends
it->second.participating_friends.insert(item->PeerId()) ;
}
}
}
if(found) // send invitation. As the peer already has the lobby, the invitation will most likely be accepted.
invitePeerToLobby(lobby_id, item->PeerId(),true) ;
#ifdef DEBUG_CHAT_LOBBIES
else
std::cerr << " Challenge denied: no existing cached msg has matching Id." << std::endl;
#endif
}
void DistributedChatService::sendConnectionChallenge(ChatLobbyId lobby_id)
{
RsStackMutex stack(mDistributedChatMtx); /********** STACK LOCKED MTX ******/
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << "Sending connection challenge to friends for lobby 0x" << std::hex << lobby_id << std::dec << std::endl ;
#endif
// look for a msg in cache. Any recent msg is fine.
std::map<ChatLobbyId,ChatLobbyEntry>::const_iterator it = _chat_lobbys.find(lobby_id) ;
if(it == _chat_lobbys.end())
{
std::cerr << "ERROR: sendConnectionChallenge(): could not find lobby 0x" << std::hex << lobby_id << std::dec << std::endl;
return ;
}
time_t now = time(NULL) ;
ChatLobbyMsgId msg_id = 0 ;
for(std::map<ChatLobbyMsgId,time_t>::const_iterator it2(it->second.msg_cache.begin());it2!=it->second.msg_cache.end();++it2)
if(it2->second + CONNECTION_CHALLENGE_MAX_MSG_AGE > now) // any msg not older than 20 seconds is fine.
{
msg_id = it2->first ;
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << " Using msg id 0x" << std::hex << it2->first << std::dec << std::endl;
#endif
break ;
}
if(msg_id == 0)
{
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << " No suitable message found in cache. Probably not enough activity !!" << std::endl;
#endif
return ;
}
// Broadcast to all direct friends
std::set<RsPeerId> ids ;
mServControl->getPeersConnected(mServType, ids);
for(std::set<RsPeerId>::const_iterator it(ids.begin());it!=ids.end();++it)
{
RsChatLobbyConnectChallengeItem *item = new RsChatLobbyConnectChallengeItem ;
uint64_t code = makeConnexionChallengeCode(*it,lobby_id,msg_id) ;
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << " Sending collexion challenge code 0x" << std::hex << code << std::dec << " to peer " << *it << std::endl;
#endif
item->PeerId(*it) ;
item->challenge_code = code ;
sendChatItem(item);
}
}
uint64_t DistributedChatService::makeConnexionChallengeCode(const RsPeerId& peer_id,ChatLobbyId lobby_id,ChatLobbyMsgId msg_id)
{
uint64_t result = 0 ;
for(uint32_t i=0;i<RsPeerId::SIZE_IN_BYTES;++i)
{
result += msg_id ;
result ^= result >> 35 ;
result += result << 6 ;
result ^= peer_id.toByteArray()[i] * lobby_id ;
result += result << 26 ;
result ^= result >> 13 ;
}
return result ;
}
void DistributedChatService::getChatLobbyList(std::list<ChatLobbyId>& clids)
{
// fill up a dummy list for now.
clids.clear() ;
RsStackMutex stack(mDistributedChatMtx); /********** STACK LOCKED MTX ******/
for(std::map<ChatLobbyId,ChatLobbyEntry>::const_iterator it(_chat_lobbys.begin());it!=_chat_lobbys.end();++it)
clids.push_back(it->first) ;
}
bool DistributedChatService::getChatLobbyInfo(const ChatLobbyId& id,ChatLobbyInfo& info)
{
// fill up a dummy list for now.
RsStackMutex stack(mDistributedChatMtx); /********** STACK LOCKED MTX ******/
std::map<ChatLobbyId,ChatLobbyEntry>::const_iterator it = _chat_lobbys.find(id) ;
if(it != _chat_lobbys.end())
{
info = it->second ;
return true ;
}
else
return false ;
}
void DistributedChatService::invitePeerToLobby(const ChatLobbyId& lobby_id, const RsPeerId& peer_id,bool connexion_challenge)
{
#ifdef DEBUG_CHAT_LOBBIES
if(connexion_challenge)
std::cerr << "Sending connection challenge accept to peer " << peer_id << " for lobby "<< std::hex << lobby_id << std::dec << std::endl;
else
std::cerr << "Sending invitation to peer " << peer_id << " to lobby "<< std::hex << lobby_id << std::dec << std::endl;
#endif
RsChatLobbyInviteItem *item = new RsChatLobbyInviteItem ;
RsStackMutex stack(mDistributedChatMtx); /********** STACK LOCKED MTX ******/
std::map<ChatLobbyId,ChatLobbyEntry>::iterator it = _chat_lobbys.find(lobby_id) ;
if(it == _chat_lobbys.end())
{
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << " invitation send: canceled. Lobby " << lobby_id << " not found!" << std::endl;
#endif
return ;
}
item->lobby_id = lobby_id ;
item->lobby_name = it->second.lobby_name ;
item->lobby_topic = it->second.lobby_topic ;
item->lobby_flags = connexion_challenge?RS_CHAT_LOBBY_FLAGS_CHALLENGE:(it->second.lobby_flags) ;
item->PeerId(peer_id) ;
sendChatItem(item) ;
}
void DistributedChatService::handleRecvLobbyInvite(RsChatLobbyInviteItem *item)
{
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << "Received invite to lobby from " << item->PeerId() << " to lobby " << std::hex << item->lobby_id << std::dec << ", named " << item->lobby_name << item->lobby_topic << std::endl;
#endif
// 1 - store invite in a cache
//
// 1.1 - if the lobby is already setup, add the peer to the communicating peers.
//
{
RsStackMutex stack(mDistributedChatMtx); /********** STACK LOCKED MTX ******/
std::map<ChatLobbyId,ChatLobbyEntry>::iterator it = _chat_lobbys.find(item->lobby_id) ;
if(it != _chat_lobbys.end())
{
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << " Lobby already exists. " << std::endl;
std::cerr << " privacy levels: " << item->lobby_flags << " vs. " << it->second.lobby_flags ;
#endif
if((!IS_CONNEXION_CHALLENGE(item->lobby_flags)) && EXTRACT_PRIVACY_FLAGS(item->lobby_flags) != EXTRACT_PRIVACY_FLAGS(it->second.lobby_flags))
{
std::cerr << " : Don't match. Cancelling." << std::endl;
return ;
}
#ifdef DEBUG_CHAT_LOBBIES
else
std::cerr << " : Match!" << std::endl;
std::cerr << " Addign new friend " << item->PeerId() << " to lobby." << std::endl;
#endif
it->second.participating_friends.insert(item->PeerId()) ;
return ;
}
// Don't record the invitation if it's a challenge response item or a lobby we don't have.
//
if(IS_CONNEXION_CHALLENGE(item->lobby_flags))
return ;
// no, then create a new invitation entry in the cache.
ChatLobbyInvite invite ;
invite.lobby_id = item->lobby_id ;
invite.peer_id = item->PeerId() ;
invite.lobby_name = item->lobby_name ;
invite.lobby_topic = item->lobby_topic ;
invite.lobby_flags = item->lobby_flags ;
_lobby_invites_queue[item->lobby_id] = invite ;
}
// 2 - notify the gui to ask the user.
RsServer::notify()->notifyListChange(NOTIFY_LIST_CHAT_LOBBY_INVITATION, NOTIFY_TYPE_ADD);
}
void DistributedChatService::getPendingChatLobbyInvites(std::list<ChatLobbyInvite>& invites)
{
invites.clear() ;
RsStackMutex stack(mDistributedChatMtx); /********** STACK LOCKED MTX ******/
for(std::map<ChatLobbyId,ChatLobbyInvite>::const_iterator it(_lobby_invites_queue.begin());it!=_lobby_invites_queue.end();++it)
invites.push_back(it->second) ;
}
bool DistributedChatService::acceptLobbyInvite(const ChatLobbyId& lobby_id,const RsGxsId& identity)
{
{
RsStackMutex stack(mDistributedChatMtx); /********** STACK LOCKED MTX ******/
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << "Accepting chat lobby "<< lobby_id << std::endl;
#endif
std::map<ChatLobbyId,ChatLobbyInvite>::iterator it = _lobby_invites_queue.find(lobby_id) ;
if(it == _lobby_invites_queue.end())
{
std::cerr << " (EE) lobby invite not in cache!!" << std::endl;
return false;
}
if(_chat_lobbys.find(lobby_id) != _chat_lobbys.end())
{
std::cerr << " (II) Lobby already exists. Weird." << std::endl;
return true ;
}
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << " Creating new Lobby entry." << std::endl;
#endif
time_t now = time(NULL) ;
ChatLobbyEntry entry ;
entry.participating_friends.insert(it->second.peer_id) ;
entry.lobby_flags = it->second.lobby_flags ;
entry.gxs_id = identity ;
entry.lobby_id = lobby_id ;
entry.lobby_name = it->second.lobby_name ;
entry.lobby_topic = it->second.lobby_topic ;
entry.virtual_peer_id = makeVirtualPeerId(lobby_id) ;
entry.connexion_challenge_count = 0 ;
entry.last_activity = now ;
entry.last_connexion_challenge_time = now ;
entry.last_keep_alive_packet_time = now ;
_lobby_ids[entry.virtual_peer_id] = lobby_id ;
_chat_lobbys[lobby_id] = entry ;
_lobby_invites_queue.erase(it) ; // remove the invite from cache.
// we should also send a message to the lobby to tell we're here.
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << " Pushing new msg item to incoming msgs." << std::endl;
#endif
RsChatLobbyMsgItem *item = new RsChatLobbyMsgItem;
item->lobby_id = entry.lobby_id ;
item->msg_id = 0 ;
item->parent_msg_id = 0 ;
item->nick = "Lobby management" ;
item->message = std::string("Welcome to chat lobby") ;
item->PeerId(entry.virtual_peer_id) ;
item->chatFlags = RS_CHAT_FLAG_PRIVATE | RS_CHAT_FLAG_LOBBY ;
locked_storeIncomingMsg(item) ;
}
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << " Notifying of new recvd msg." << std::endl ;
#endif
RsServer::notify()->notifyListChange(NOTIFY_LIST_PRIVATE_INCOMING_CHAT, NOTIFY_TYPE_ADD);
RsServer::notify()->notifyListChange(NOTIFY_LIST_CHAT_LOBBY_LIST, NOTIFY_TYPE_ADD);
// send AKN item
sendLobbyStatusNewPeer(lobby_id) ;
return true ;
}
ChatLobbyVirtualPeerId DistributedChatService::makeVirtualPeerId(ChatLobbyId lobby_id)
{
uint8_t bytes[RsPeerId::SIZE_IN_BYTES] ;
memset(bytes,0,RsPeerId::SIZE_IN_BYTES) ;
memcpy(bytes,&lobby_id,sizeof(lobby_id)) ;
return ChatLobbyVirtualPeerId(bytes) ;
}
void DistributedChatService::denyLobbyInvite(const ChatLobbyId& lobby_id)
{
RsStackMutex stack(mDistributedChatMtx); /********** STACK LOCKED MTX ******/
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << "Denying chat lobby invite to "<< lobby_id << std::endl;
#endif
std::map<ChatLobbyId,ChatLobbyInvite>::iterator it = _lobby_invites_queue.find(lobby_id) ;
if(it == _lobby_invites_queue.end())
{
std::cerr << " (EE) lobby invite not in cache!!" << std::endl;
return ;
}
_lobby_invites_queue.erase(it) ;
}
bool DistributedChatService::joinVisibleChatLobby(const ChatLobbyId& lobby_id,const RsGxsId& gxs_id)
{
if(!mGixs->isOwnId(gxs_id))
{
std::cerr << "(EE) Cannot lobby using gxs id " << gxs_id << std::endl;
return false ;
}
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << "Joining public chat lobby " << std::hex << lobby_id << std::dec << std::endl;
#endif
std::list<RsPeerId> invited_friends ;
{
RsStackMutex stack(mDistributedChatMtx); /********** STACK LOCKED MTX ******/
// create a unique id.
//
std::map<ChatLobbyId,VisibleChatLobbyRecord>::const_iterator it(_visible_lobbies.find(lobby_id)) ;
if(it == _visible_lobbies.end())
{
std::cerr << " lobby is not a known public chat lobby. Sorry!" << std::endl;
return false ;
}
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << " lobby found. Initiating join sequence..." << std::endl;
#endif
if(_chat_lobbys.find(lobby_id) != _chat_lobbys.end())
{
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << " lobby already in participating list. Returning!" << std::endl;
#endif
return true ;
}
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << " Creating new lobby entry." << std::endl;
#endif
time_t now = time(NULL) ;
ChatLobbyEntry entry ;
entry.lobby_flags = it->second.lobby_flags ;//RS_CHAT_LOBBY_PRIVACY_LEVEL_PUBLIC ;
entry.participating_friends.clear() ;
entry.gxs_id = gxs_id ;
entry.lobby_id = lobby_id ;
entry.lobby_name = it->second.lobby_name ;
entry.lobby_topic = it->second.lobby_topic ;
entry.virtual_peer_id = makeVirtualPeerId(lobby_id) ;
entry.connexion_challenge_count = 0 ;
entry.last_activity = now ;
entry.last_connexion_challenge_time = now ;
entry.last_keep_alive_packet_time = now ;
_lobby_ids[entry.virtual_peer_id] = lobby_id ;
for(std::set<RsPeerId>::const_iterator it2(it->second.participating_friends.begin());it2!=it->second.participating_friends.end();++it2)
{
invited_friends.push_back(*it2) ;
entry.participating_friends.insert(*it2) ;
}
_chat_lobbys[lobby_id] = entry ;
}
for(std::list<RsPeerId>::const_iterator it(invited_friends.begin());it!=invited_friends.end();++it)
invitePeerToLobby(lobby_id,*it) ;
RsServer::notify()->notifyListChange(NOTIFY_LIST_CHAT_LOBBY_LIST, NOTIFY_TYPE_ADD) ;
sendLobbyStatusNewPeer(lobby_id) ;
return true ;
}
ChatLobbyId DistributedChatService::createChatLobby(const std::string& lobby_name,const RsGxsId& lobby_identity,const std::string& lobby_topic,const std::set<RsPeerId>& invited_friends,ChatLobbyFlags lobby_flags)
{
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << "Creating a new Chat lobby !!" << std::endl;
#endif
ChatLobbyId lobby_id ;
{
RsStackMutex stack(mDistributedChatMtx); /********** STACK LOCKED MTX ******/
// create a unique id.
//
do { lobby_id = RSRandom::random_u64() ; } while(_chat_lobbys.find(lobby_id) != _chat_lobbys.end()) ;
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << " New (unique) ID: " << std::hex << lobby_id << std::dec << std::endl;
#endif
time_t now = time(NULL) ;
ChatLobbyEntry entry ;
entry.lobby_flags = lobby_flags ;
entry.participating_friends.clear() ;
entry.gxs_id = lobby_identity ; // to be changed. For debug only!!
entry.lobby_id = lobby_id ;
entry.lobby_name = lobby_name ;
entry.lobby_topic = lobby_topic ;
entry.virtual_peer_id = makeVirtualPeerId(lobby_id) ;
entry.connexion_challenge_count = 0 ;
entry.last_activity = now ;
entry.last_connexion_challenge_time = now ;
entry.last_keep_alive_packet_time = now ;
_lobby_ids[entry.virtual_peer_id] = lobby_id ;
_chat_lobbys[lobby_id] = entry ;
}
for(std::set<RsPeerId>::const_iterator it(invited_friends.begin());it!=invited_friends.end();++it)
invitePeerToLobby(lobby_id,*it) ;
RsServer::notify()->notifyListChange(NOTIFY_LIST_CHAT_LOBBY_LIST, NOTIFY_TYPE_ADD) ;
return lobby_id ;
}
void DistributedChatService::handleFriendUnsubscribeLobby(RsChatLobbyUnsubscribeItem *item)
{
{
RsStackMutex stack(mDistributedChatMtx); /********** STACK LOCKED MTX ******/
std::map<ChatLobbyId,ChatLobbyEntry>::iterator it = _chat_lobbys.find(item->lobby_id) ;
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << "Received unsubscribed to lobby " << std::hex << item->lobby_id << std::dec << ", from friend " << item->PeerId() << std::endl;
#endif
if(it == _chat_lobbys.end())
{
std::cerr << "Chat lobby " << std::hex << item->lobby_id << std::dec << " does not exist ! Can't unsubscribe friend!" << std::endl;
return ;
}
for(std::set<RsPeerId>::iterator it2(it->second.participating_friends.begin());it2!=it->second.participating_friends.end();++it2)
if(*it2 == item->PeerId())
{
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << " removing peer id " << item->PeerId() << " from participant list of lobby " << std::hex << item->lobby_id << std::dec << std::endl;
#endif
it->second.previously_known_peers.insert(*it2) ;
it->second.participating_friends.erase(it2) ;
break ;
}
}
RsServer::notify()->notifyListChange(NOTIFY_LIST_CHAT_LOBBY_LIST, NOTIFY_TYPE_MOD) ;
}
void DistributedChatService::unsubscribeChatLobby(const ChatLobbyId& id)
{
// send AKN item
sendLobbyStatusPeerLiving(id) ;
{
RsStackMutex stack(mDistributedChatMtx); /********** STACK LOCKED MTX ******/
std::map<ChatLobbyId,ChatLobbyEntry>::iterator it = _chat_lobbys.find(id) ;
if(it == _chat_lobbys.end())
{
std::cerr << "Chat lobby " << id << " does not exist ! Can't unsubscribe!" << std::endl;
return ;
}
// send a lobby leaving packet to all friends
for(std::set<RsPeerId>::const_iterator it2(it->second.participating_friends.begin());it2!=it->second.participating_friends.end();++it2)
{
RsChatLobbyUnsubscribeItem *item = new RsChatLobbyUnsubscribeItem ;
item->lobby_id = id ;
item->PeerId(*it2) ;
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << "Sending unsubscribe item to friend " << *it2 << std::endl;
#endif
sendChatItem(item) ;
}
// remove history
//mHistoryMgr->clear(it->second.virtual_peer_id);
// remove lobby information
_chat_lobbys.erase(it) ;
for(std::map<ChatLobbyVirtualPeerId,ChatLobbyId>::iterator it2(_lobby_ids.begin());it2!=_lobby_ids.end();++it2)
if(it2->second == id)
{
_lobby_ids.erase(it2) ;
break ;
}
}
RsServer::notify()->notifyListChange(NOTIFY_LIST_CHAT_LOBBY_LIST, NOTIFY_TYPE_DEL) ;
// done!
}
bool DistributedChatService::setDefaultIdentityForChatLobby(const RsGxsId& nick)
{
if (nick.isNull())
{
std::cerr << "Ignore empty nickname for chat lobby " << std::endl;
return false;
}
{
RsStackMutex stack(mDistributedChatMtx); /********** STACK LOCKED MTX ******/
_default_identity = nick;
}
triggerConfigSave() ;
return true ;
}
void DistributedChatService::getDefaultIdentityForChatLobby(RsGxsId& nick)
{
RsStackMutex stack(mDistributedChatMtx); /********** STACK LOCKED MTX ******/
nick = locked_getDefaultIdentity() ;
}
RsGxsId DistributedChatService::locked_getDefaultIdentity()
{
if(_default_identity.isNull() && rsIdentity!=NULL)
{
std::list<RsGxsId> own_ids ;
rsIdentity->getOwnIds(own_ids) ;
if(!own_ids.empty())
{
_default_identity = own_ids.front() ;
triggerConfigSave();
}
}
return _default_identity ;
}
bool DistributedChatService::getIdentityForChatLobby(const ChatLobbyId& lobby_id,RsGxsId& nick)
{
RsStackMutex stack(mDistributedChatMtx); /********** STACK LOCKED MTX ******/
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << "getting nickname for chat lobby "<< std::hex << lobby_id << std::dec << std::endl;
#endif
std::map<ChatLobbyId,ChatLobbyEntry>::iterator it = _chat_lobbys.find(lobby_id) ;
if(it == _chat_lobbys.end())
{
std::cerr << " (EE) lobby does not exist!!" << std::endl;
return false ;
}
nick = it->second.gxs_id ;
return true ;
}
bool DistributedChatService::setIdentityForChatLobby(const ChatLobbyId& lobby_id,const RsGxsId& nick)
{
if (nick.isNull())
{
std::cerr << "(EE) Ignore empty nickname for chat lobby " << nick << std::endl;
return false;
}
// first check for change and send status peer changed nick name
bool changed = false;
std::map<ChatLobbyId,ChatLobbyEntry>::iterator it;
{
RsStackMutex stack(mDistributedChatMtx); /********** STACK LOCKED MTX ******/
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << "Changing nickname for chat lobby " << std::hex << lobby_id << std::dec << " to " << nick << std::endl;
#endif
it = _chat_lobbys.find(lobby_id) ;
if(it == _chat_lobbys.end())
{
std::cerr << " (EE) lobby does not exist!!" << std::endl;
return false;
}
if (!it->second.gxs_id.isNull() && it->second.gxs_id != nick)
{
changed = true;
}
}
if (changed)
{
// Inform other peers of change the Nickname
sendLobbyStatusPeerChangedNickname(lobby_id, nick.toStdString()) ;
// set new nick name
RsStackMutex stack(mDistributedChatMtx); /********** STACK LOCKED MTX ******/
it = _chat_lobbys.find(lobby_id) ;
if(it == _chat_lobbys.end())
{
std::cerr << " (EE) lobby does not exist!!" << std::endl;
return false;
}
it->second.gxs_id = nick ;
}
return true ;
}
void DistributedChatService::setLobbyAutoSubscribe(const ChatLobbyId& lobby_id, const bool autoSubscribe)
{
if(autoSubscribe)
_known_lobbies_flags[lobby_id] |= RS_CHAT_LOBBY_FLAGS_AUTO_SUBSCRIBE ;
else
_known_lobbies_flags[lobby_id] &= ~RS_CHAT_LOBBY_FLAGS_AUTO_SUBSCRIBE ;
RsServer::notify()->notifyListChange(NOTIFY_LIST_CHAT_LOBBY_LIST, NOTIFY_TYPE_ADD) ;
triggerConfigSave();
}
bool DistributedChatService::getLobbyAutoSubscribe(const ChatLobbyId& lobby_id)
{
if(_known_lobbies_flags.find(lobby_id) == _known_lobbies_flags.end()) // keep safe about default values form std::map
return false;
return _known_lobbies_flags[lobby_id] & RS_CHAT_LOBBY_FLAGS_AUTO_SUBSCRIBE ;
}
void DistributedChatService::cleanLobbyCaches()
{
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << "Cleaning chat lobby caches." << std::endl;
#endif
std::list<ChatLobbyId> keep_alive_lobby_ids ;
std::list<ChatLobbyId> changed_lobbies ;
std::list<ChatLobbyId> send_challenge_lobbies ;
{
RsStackMutex stack(mDistributedChatMtx); /********** STACK LOCKED MTX ******/
time_t now = time(NULL) ;
// 1 - clean cache of all lobbies and participating nicknames.
//
for(std::map<ChatLobbyId,ChatLobbyEntry>::iterator it = _chat_lobbys.begin();it!=_chat_lobbys.end();++it)
{
for(std::map<ChatLobbyMsgId,time_t>::iterator it2(it->second.msg_cache.begin());it2!=it->second.msg_cache.end();)
if(it2->second + MAX_KEEP_MSG_RECORD < now)
{
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << " removing old msg 0x" << std::hex << it2->first << ", time=" << std::dec << now - it2->second << " secs ago" << std::endl;
#endif
std::map<ChatLobbyMsgId,time_t>::iterator tmp(it2) ;
++tmp ;
it->second.msg_cache.erase(it2) ;
it2 = tmp ;
}
else
++it2 ;
bool changed = false ;
for(std::map<RsGxsId,time_t>::iterator it2(it->second.gxs_ids.begin());it2!=it->second.gxs_ids.end();)
if(it2->second + MAX_KEEP_INACTIVE_NICKNAME < now)
{
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << " removing inactive nickname 0x" << std::hex << it2->first << ", time=" << std::dec << now - it2->second << " secs ago" << std::endl;
#endif
std::map<RsGxsId,time_t>::iterator tmp(it2) ;
++tmp ;
it->second.gxs_ids.erase(it2) ;
it2 = tmp ;
changed = true ;
}
else
++it2 ;
if(changed)
changed_lobbies.push_back(it->first) ;
// 3 - send lobby keep-alive packets to all lobbies
//
if(it->second.last_keep_alive_packet_time + MAX_DELAY_BETWEEN_LOBBY_KEEP_ALIVE < now)
{
keep_alive_lobby_ids.push_back(it->first) ;
it->second.last_keep_alive_packet_time = now ;
}
// 4 - look at lobby activity and possibly send connection challenge
//
if(++it->second.connexion_challenge_count > CONNECTION_CHALLENGE_MAX_COUNT && now > it->second.last_connexion_challenge_time + CONNECTION_CHALLENGE_MIN_DELAY)
{
it->second.connexion_challenge_count = 0 ;
it->second.last_connexion_challenge_time = now ;
send_challenge_lobbies.push_back(it->first);
}
}
// 2 - clean deprecated public chat lobby records
//
for(std::map<ChatLobbyId,VisibleChatLobbyRecord>::iterator it(_visible_lobbies.begin());it!=_visible_lobbies.end();)
if(it->second.last_report_time + MAX_KEEP_PUBLIC_LOBBY_RECORD < now && _chat_lobbys.find(it->first)==_chat_lobbys.end()) // this lobby record is too late.
{
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << " removing old public lobby record 0x" << std::hex << it->first << ", time=" << std::dec << now - it->second.last_report_time << " secs ago" << std::endl;
#endif
std::map<ChatLobbyMsgId,VisibleChatLobbyRecord>::iterator tmp(it) ;
++tmp ;
_visible_lobbies.erase(it) ;
it = tmp ;
}
else
++it ;
}
for(std::list<ChatLobbyId>::const_iterator it(keep_alive_lobby_ids.begin());it!=keep_alive_lobby_ids.end();++it)
sendLobbyStatusKeepAlive(*it) ;
// update the gui
for(std::list<ChatLobbyId>::const_iterator it(changed_lobbies.begin());it!=changed_lobbies.end();++it)
RsServer::notify()->notifyChatLobbyEvent(*it,RS_CHAT_LOBBY_EVENT_KEEP_ALIVE,"------------","") ;
// send connection challenges
//
for(std::list<ChatLobbyId>::const_iterator it(send_challenge_lobbies.begin());it!=send_challenge_lobbies.end();++it)
sendConnectionChallenge(*it) ;
}
void DistributedChatService::addToSaveList(std::list<RsItem*>& list) const
{
/* Save Lobby Auto Subscribe */
for(std::map<ChatLobbyId,ChatLobbyFlags>::const_iterator it=_known_lobbies_flags.begin();it!=_known_lobbies_flags.end();++it)
{
RsChatLobbyConfigItem *clci = new RsChatLobbyConfigItem ;
clci->lobby_Id=it->first;
clci->flags=it->second.toUInt32();
list.push_back(clci) ;
}
/* Save Default Nick Name */
RsConfigKeyValueSet *vitem = new RsConfigKeyValueSet ;
RsTlvKeyValue kv;
kv.key = "DEFAULT_IDENTITY" ;
kv.value = _default_identity.toStdString() ;
vitem->tlvkvs.pairs.push_back(kv) ;
list.push_back(vitem) ;
}
bool DistributedChatService::processLoadListItem(const RsItem *item)
{
const RsConfigKeyValueSet *vitem = NULL ;
_default_identity.clear() ;
if(NULL != (vitem = dynamic_cast<const RsConfigKeyValueSet*>(item)))
for(std::list<RsTlvKeyValue>::const_iterator kit = vitem->tlvkvs.pairs.begin(); kit != vitem->tlvkvs.pairs.end(); ++kit)
if(kit->key == "DEFAULT_IDENTITY")
{
#ifdef DEBUG_CHAT_LOBBIES
std::cerr << "Loaded config default nick name for distributed chat: " << kit->value << std::endl ;
#endif
if (!kit->value.empty())
{
_default_identity = RsGxsId(kit->value) ;
if(_default_identity.isNull())
std::cerr << "ERROR: default identity is malformed." << std::endl;
}
return true;
}
const RsChatLobbyConfigItem *clci = NULL ;
if(NULL != (clci = dynamic_cast<const RsChatLobbyConfigItem*>(item)))
{
_known_lobbies_flags[clci->lobby_Id] = ChatLobbyFlags(clci->flags) ;
return true ;
}
if(_default_identity.isNull() && rsIdentity!=NULL)
{
std::list<RsGxsId> own_ids ;
rsIdentity->getOwnIds(own_ids) ;
if(!own_ids.empty())
_default_identity = own_ids.front() ;
}
return false ;
}
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