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