src/modules/m_spanningtree/netburst.cpp

   1 /*
   2  * InspIRCd -- Internet Relay Chat Daemon
   3  *
   4  *   Copyright (C) 2009 Daniel De Graaf <danieldg@inspircd.org>
   5  *   Copyright (C) 2008 Robin Burchell <robin+git@viroteck.net>
   6  *   Copyright (C) 2008 Craig Edwards <craigedwards@brainbox.cc>
   7  *
   8  * This file is part of InspIRCd.  InspIRCd is free software: you can
   9  * redistribute it and/or modify it under the terms of the GNU General Public
  10  * License as published by the Free Software Foundation, version 2.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  14  * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
  15  * details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21
  22 #include "inspircd.h"
  23 #include "xline.h"
  24 #include "listmode.h"
  25
  26 #include "treesocket.h"
  27 #include "treeserver.h"
  28 #include "main.h"
  29
  30 /** This function is called when we want to send a netburst to a local
  31  * server. There is a set order we must do this, because for example
  32  * users require their servers to exist, and channels require their
  33  * users to exist. You get the idea.
  34  */
  35 void TreeSocket::DoBurst(TreeServer* s)
  36 {
  37         std::string servername = s->GetName();
  38         ServerInstance->SNO->WriteToSnoMask('l',"Bursting to \2%s\2 (Authentication: %s%s).",
  39                 servername.c_str(),
  40                 capab->auth_fingerprint ? "SSL Fingerprint and " : "",
  41                 capab->auth_challenge ? "challenge-response" : "plaintext password");
  42         this->CleanNegotiationInfo();
  43         this->WriteLine(":" + ServerInstance->Config->GetSID() + " BURST " + ConvToStr(ServerInstance->Time()));
  44         /* send our version string */
  45         this->WriteLine(":" + ServerInstance->Config->GetSID() + " VERSION :"+ServerInstance->GetVersionString());
  46         /* Send server tree */
  47         this->SendServers(Utils->TreeRoot,s,1);
  48         /* Send users and their oper status */
  49         this->SendUsers();
  50
  51         for (chan_hash::const_iterator i = ServerInstance->chanlist->begin(); i != ServerInstance->chanlist->end(); ++i)
  52                 SyncChannel(i->second);
  53
  54         this->SendXLines();
  55         FOREACH_MOD(I_OnSyncNetwork,OnSyncNetwork(Utils->Creator,(void*)this));
  56         this->WriteLine(":" + ServerInstance->Config->GetSID() + " ENDBURST");
  57         ServerInstance->SNO->WriteToSnoMask('l',"Finished bursting to \2"+ s->GetName()+"\2.");
  58 }
  59
  60 /** Recursively send the server tree with distances as hops.
  61  * This is used during network burst to inform the other server
  62  * (and any of ITS servers too) of what servers we know about.
  63  * If at any point any of these servers already exist on the other
  64  * end, our connection may be terminated. The hopcounts given
  65  * by this function are relative, this doesn't matter so long as
  66  * they are all >1, as all the remote servers re-calculate them
  67  * to be relative too, with themselves as hop 0.
  68  */
  69 void TreeSocket::SendServers(TreeServer* Current, TreeServer* s, int hops)
  70 {
  71         char command[MAXBUF];
  72         for (unsigned int q = 0; q < Current->ChildCount(); q++)
  73         {
  74                 TreeServer* recursive_server = Current->GetChild(q);
  75                 if (recursive_server != s)
  76                 {
  77                         std::string recursive_servername = recursive_server->GetName();
  78                         snprintf(command, MAXBUF, ":%s SERVER %s * %d %s :%s", Current->GetID().c_str(), recursive_servername.c_str(), hops,
  79                                         recursive_server->GetID().c_str(),
  80                                         recursive_server->GetDesc().c_str());
  81                         this->WriteLine(command);
  82                         this->WriteLine(":"+recursive_server->GetID()+" VERSION :"+recursive_server->GetVersion());
  83                         /* down to next level */
  84                         this->SendServers(recursive_server, s, hops+1);
  85                 }
  86         }
  87 }
  88
  89 /** Send one or more FJOINs for a channel of users.
  90  * If the length of a single line is more than 480-NICKMAX
  91  * in length, it is split over multiple lines.
  92  * Send one or more FMODEs for a channel with the
  93  * channel bans, if there's any.
  94  */
  95 void TreeSocket::SendFJoins(Channel* c)
  96 {
  97         std::string line(":");
  98         line.append(ServerInstance->Config->GetSID()).append(" FJOIN ").append(c->name).append(1, ' ').append(ConvToStr(c->age)).append(" +");
  99         std::string::size_type erase_from = line.length();
 100         line.append(c->ChanModes(true)).append(" :");
 101
 102         const UserMembList *ulist = c->GetUsers();
 103
 104         for (UserMembCIter i = ulist->begin(); i != ulist->end(); ++i)
 105         {
 106                 const std::string& modestr = i->second->modes;
 107                 if ((line.length() + modestr.length() + (UUID_LENGTH-1) + 2) > 480)
 108                 {
 109                         this->WriteLine(line);
 110                         line.erase(erase_from);
 111                         line.append(" :");
 112                 }
 113                 line.append(modestr).append(1, ',').append(i->first->uuid).push_back(' ');
 114         }
 115         this->WriteLine(line);
 116
 117         ModeReference ban(NULL, "ban");
 118         static_cast<ListModeBase*>(*ban)->DoSyncChannel(c, Utils->Creator, this);
 119 }
 120
 121 /** Send all XLines we know about */
 122 void TreeSocket::SendXLines()
 123 {
 124         char data[MAXBUF];
 125         const char* sn = ServerInstance->Config->GetSID().c_str();
 126
 127         std::vector<std::string> types = ServerInstance->XLines->GetAllTypes();
 128
 129         for (std::vector<std::string>::const_iterator it = types.begin(); it != types.end(); ++it)
 130         {
 131                 /* Expired lines are removed in XLineManager::GetAll() */
 132                 XLineLookup* lookup = ServerInstance->XLines->GetAll(*it);
 133
 134                 /* lookup cannot be NULL in this case but a check won't hurt */
 135                 if (lookup)
 136                 {
 137                         for (LookupIter i = lookup->begin(); i != lookup->end(); ++i)
 138                         {
 139                                 /* Is it burstable? this is better than an explicit check for type 'K'.
 140                                  * We break the loop as NONE of the items in this group are worth iterating.
 141                                  */
 142                                 if (!i->second->IsBurstable())
 143                                         break;
 144
 145                                 snprintf(data,MAXBUF,":%s ADDLINE %s %s %s %lu %lu :%s",sn, it->c_str(), i->second->Displayable(),
 146                                                 i->second->source.c_str(),
 147                                                 (unsigned long)i->second->set_time,
 148                                                 (unsigned long)i->second->duration,
 149                                                 i->second->reason.c_str());
 150                                 this->WriteLine(data);
 151                         }
 152                 }
 153         }
 154 }
 155
 156 /** Send channel topic, modes and metadata */
 157 void TreeSocket::SyncChannel(Channel* chan)
 158 {
 159         char data[MAXBUF];
 160
 161         SendFJoins(chan);
 162
 163         // If the topic was ever set, send it, even if it's empty now
 164         // because a new empty topic should override an old non-empty topic
 165         if (chan->topicset != 0)
 166         {
 167                 snprintf(data,MAXBUF,":%s FTOPIC %s %lu %lu %s :%s", ServerInstance->Config->GetSID().c_str(), chan->name.c_str(), (unsigned long) chan->age, (unsigned long)chan->topicset, chan->setby.c_str(), chan->topic.c_str());
 168                 this->WriteLine(data);
 169         }
 170
 171         for (Extensible::ExtensibleStore::const_iterator i = chan->GetExtList().begin(); i != chan->GetExtList().end(); i++)
 172         {
 173                 ExtensionItem* item = i->first;
 174                 std::string value = item->serialize(FORMAT_NETWORK, chan, i->second);
 175                 if (!value.empty())
 176                         Utils->Creator->ProtoSendMetaData(this, chan, item->name, value);
 177         }
 178
 179         FOREACH_MOD(I_OnSyncChannel,OnSyncChannel(chan, Utils->Creator, this));
 180 }
 181
 182 /** send all users and their oper state/modes */
 183 void TreeSocket::SendUsers()
 184 {
 185         char data[MAXBUF];
 186         std::string dataline;
 187         for (user_hash::iterator u = ServerInstance->Users->clientlist->begin(); u != ServerInstance->Users->clientlist->end(); u++)
 188         {
 189                 if (u->second->registered == REG_ALL)
 190                 {
 191                         TreeServer* theirserver = Utils->FindServer(u->second->server);
 192                         if (theirserver)
 193                         {
 194                                 snprintf(data,MAXBUF,":%s UID %s %lu %s %s %s %s %s %lu +%s :%s",
 195                                                 theirserver->GetID().c_str(),   /* Prefix: SID */
 196                                                 u->second->uuid.c_str(),        /* 0: UUID */
 197                                                 (unsigned long)u->second->age,  /* 1: TS */
 198                                                 u->second->nick.c_str(),        /* 2: Nick */
 199                                                 u->second->host.c_str(),        /* 3: Displayed Host */
 200                                                 u->second->dhost.c_str(),       /* 4: Real host */
 201                                                 u->second->ident.c_str(),       /* 5: Ident */
 202                                                 u->second->GetIPString().c_str(),       /* 6: IP string */
 203                                                 (unsigned long)u->second->signon, /* 7: Signon time for WHOWAS */
 204                                                 u->second->FormatModes(true),   /* 8...n: Modes and params */
 205                                                 u->second->fullname.c_str());   /* size-1: GECOS */
 206                                 this->WriteLine(data);
 207                                 if (u->second->IsOper())
 208                                 {
 209                                         snprintf(data,MAXBUF,":%s OPERTYPE %s", u->second->uuid.c_str(), u->second->oper->name.c_str());
 210                                         this->WriteLine(data);
 211                                 }
 212                                 if (u->second->IsAway())
 213                                 {
 214                                         snprintf(data,MAXBUF,":%s AWAY %ld :%s", u->second->uuid.c_str(), (long)u->second->awaytime, u->second->awaymsg.c_str());
 215                                         this->WriteLine(data);
 216                                 }
 217                         }
 218
 219                         for(Extensible::ExtensibleStore::const_iterator i = u->second->GetExtList().begin(); i != u->second->GetExtList().end(); i++)
 220                         {
 221                                 ExtensionItem* item = i->first;
 222                                 std::string value = item->serialize(FORMAT_NETWORK, u->second, i->second);
 223                                 if (!value.empty())
 224                                         Utils->Creator->ProtoSendMetaData(this, u->second, item->name, value);
 225                         }
 226
 227                         FOREACH_MOD(I_OnSyncUser,OnSyncUser(u->second,Utils->Creator,this));
 228                 }
 229         }
 230 }
 231