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         /* Send everything else (channel modes, xlines etc) */
  52         this->SendChannelModes();
  53         this->SendXLines();
  54         FOREACH_MOD(I_OnSyncNetwork,OnSyncNetwork(Utils->Creator,(void*)this));
  55         this->WriteLine(":" + ServerInstance->Config->GetSID() + " ENDBURST");
  56         ServerInstance->SNO->WriteToSnoMask('l',"Finished bursting to \2"+ s->GetName()+"\2.");
  57 }
  58
  59 /** Recursively send the server tree with distances as hops.
  60  * This is used during network burst to inform the other server
  61  * (and any of ITS servers too) of what servers we know about.
  62  * If at any point any of these servers already exist on the other
  63  * end, our connection may be terminated. The hopcounts given
  64  * by this function are relative, this doesn't matter so long as
  65  * they are all >1, as all the remote servers re-calculate them
  66  * to be relative too, with themselves as hop 0.
  67  */
  68 void TreeSocket::SendServers(TreeServer* Current, TreeServer* s, int hops)
  69 {
  70         char command[MAXBUF];
  71         for (unsigned int q = 0; q < Current->ChildCount(); q++)
  72         {
  73                 TreeServer* recursive_server = Current->GetChild(q);
  74                 if (recursive_server != s)
  75                 {
  76                         std::string recursive_servername = recursive_server->GetName();
  77                         snprintf(command, MAXBUF, ":%s SERVER %s * %d %s :%s", Current->GetID().c_str(), recursive_servername.c_str(), hops,
  78                                         recursive_server->GetID().c_str(),
  79                                         recursive_server->GetDesc().c_str());
  80                         this->WriteLine(command);
  81                         this->WriteLine(":"+recursive_server->GetID()+" VERSION :"+recursive_server->GetVersion());
  82                         /* down to next level */
  83                         this->SendServers(recursive_server, s, hops+1);
  84                 }
  85         }
  86 }
  87
  88 /** Send one or more FJOINs for a channel of users.
  89  * If the length of a single line is more than 480-NICKMAX
  90  * in length, it is split over multiple lines.
  91  */
  92 void TreeSocket::SendFJoins(Channel* c)
  93 {
  94         std::string buffer;
  95         char list[MAXBUF];
  96
  97         size_t curlen, headlen;
  98         curlen = headlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu +%s :",
  99                 ServerInstance->Config->GetSID().c_str(), c->name.c_str(), (unsigned long)c->age, c->ChanModes(true));
 100         int numusers = 0;
 101         char* ptr = list + curlen;
 102         bool looped_once = false;
 103
 104         const UserMembList *ulist = c->GetUsers();
 105         std::string modes;
 106         std::string params;
 107
 108         for (UserMembCIter i = ulist->begin(); i != ulist->end(); i++)
 109         {
 110                 size_t ptrlen = 0;
 111                 std::string modestr = i->second->modes;
 112
 113                 if ((curlen + modestr.length() + i->first->uuid.length() + 4) > 480)
 114                 {
 115                         // remove the final space
 116                         if (ptr[-1] == ' ')
 117                                 ptr[-1] = '\0';
 118                         buffer.append(list).append("\r\n");
 119                         curlen = headlen;
 120                         ptr = list + headlen;
 121                         numusers = 0;
 122                 }
 123
 124                 ptrlen = snprintf(ptr, MAXBUF-curlen, "%s,%s ", modestr.c_str(), i->first->uuid.c_str());
 125
 126                 looped_once = true;
 127
 128                 curlen += ptrlen;
 129                 ptr += ptrlen;
 130
 131                 numusers++;
 132         }
 133
 134         // Okay, permanent channels will (of course) need this \r\n anyway, numusers check is if there
 135         // actually were people in the channel (looped_once == true)
 136         if (!looped_once || numusers > 0)
 137         {
 138                 // remove the final space
 139                 if (ptr[-1] == ' ')
 140                         ptr[-1] = '\0';
 141                 buffer.append(list).append("\r\n");
 142         }
 143
 144         ModeReference ban(NULL, "ban");
 145         static_cast<ListModeBase*>(*ban)->DoSyncChannel(c, Utils->Creator, this);
 146 }
 147
 148 /** Send all XLines we know about */
 149 void TreeSocket::SendXLines()
 150 {
 151         char data[MAXBUF];
 152         std::string n = ServerInstance->Config->GetSID();
 153         const char* sn = n.c_str();
 154
 155         std::vector<std::string> types = ServerInstance->XLines->GetAllTypes();
 156         time_t current = ServerInstance->Time();
 157
 158         for (std::vector<std::string>::iterator it = types.begin(); it != types.end(); ++it)
 159         {
 160                 XLineLookup* lookup = ServerInstance->XLines->GetAll(*it);
 161
 162                 if (lookup)
 163                 {
 164                         for (LookupIter i = lookup->begin(); i != lookup->end(); ++i)
 165                         {
 166                                 /* Is it burstable? this is better than an explicit check for type 'K'.
 167                                  * We break the loop as NONE of the items in this group are worth iterating.
 168                                  */
 169                                 if (!i->second->IsBurstable())
 170                                         break;
 171
 172                                 /* If it's expired, don't bother to burst it
 173                                  */
 174                                 if (i->second->duration && current > i->second->expiry)
 175                                         continue;
 176
 177                                 snprintf(data,MAXBUF,":%s ADDLINE %s %s %s %lu %lu :%s",sn, it->c_str(), i->second->Displayable(),
 178                                                 i->second->source.c_str(),
 179                                                 (unsigned long)i->second->set_time,
 180                                                 (unsigned long)i->second->duration,
 181                                                 i->second->reason.c_str());
 182                                 this->WriteLine(data);
 183                         }
 184                 }
 185         }
 186 }
 187
 188 /** Send channel topic, modes and metadata */
 189 void TreeSocket::SendChannelModes()
 190 {
 191         char data[MAXBUF];
 192         std::string n = ServerInstance->Config->GetSID();
 193         const char* sn = n.c_str();
 194
 195         for (chan_hash::iterator c = ServerInstance->chanlist->begin(); c != ServerInstance->chanlist->end(); c++)
 196         {
 197                 SendFJoins(c->second);
 198                 if (!c->second->topic.empty())
 199                 {
 200                         snprintf(data,MAXBUF,":%s FTOPIC %s %lu %s :%s", sn, c->second->name.c_str(), (unsigned long)c->second->topicset, c->second->setby.c_str(), c->second->topic.c_str());
 201                         this->WriteLine(data);
 202                 }
 203
 204                 for(Extensible::ExtensibleStore::const_iterator i = c->second->GetExtList().begin(); i != c->second->GetExtList().end(); i++)
 205                 {
 206                         ExtensionItem* item = i->first;
 207                         std::string value = item->serialize(FORMAT_NETWORK, c->second, i->second);
 208                         if (!value.empty())
 209                                 Utils->Creator->ProtoSendMetaData(this, c->second, item->name, value);
 210                 }
 211
 212                 FOREACH_MOD(I_OnSyncChannel,OnSyncChannel(c->second,Utils->Creator,this));
 213         }
 214 }
 215
 216 /** send all users and their oper state/modes */
 217 void TreeSocket::SendUsers()
 218 {
 219         char data[MAXBUF];
 220         std::string dataline;
 221         for (user_hash::iterator u = ServerInstance->Users->clientlist->begin(); u != ServerInstance->Users->clientlist->end(); u++)
 222         {
 223                 if (u->second->registered == REG_ALL)
 224                 {
 225                         TreeServer* theirserver = Utils->FindServer(u->second->server);
 226                         if (theirserver)
 227                         {
 228                                 snprintf(data,MAXBUF,":%s UID %s %lu %s %s %s %s %s %lu +%s :%s",
 229                                                 theirserver->GetID().c_str(),   /* Prefix: SID */
 230                                                 u->second->uuid.c_str(),        /* 0: UUID */
 231                                                 (unsigned long)u->second->age,  /* 1: TS */
 232                                                 u->second->nick.c_str(),        /* 2: Nick */
 233                                                 u->second->host.c_str(),        /* 3: Displayed Host */
 234                                                 u->second->dhost.c_str(),       /* 4: Real host */
 235                                                 u->second->ident.c_str(),       /* 5: Ident */
 236                                                 u->second->GetIPString().c_str(),       /* 6: IP string */
 237                                                 (unsigned long)u->second->signon, /* 7: Signon time for WHOWAS */
 238                                                 u->second->FormatModes(true),   /* 8...n: Modes and params */
 239                                                 u->second->fullname.c_str());   /* size-1: GECOS */
 240                                 this->WriteLine(data);
 241                                 if (IS_OPER(u->second))
 242                                 {
 243                                         snprintf(data,MAXBUF,":%s OPERTYPE %s", u->second->uuid.c_str(), u->second->oper->name.c_str());
 244                                         this->WriteLine(data);
 245                                 }
 246                                 if (IS_AWAY(u->second))
 247                                 {
 248                                         snprintf(data,MAXBUF,":%s AWAY %ld :%s", u->second->uuid.c_str(), (long)u->second->awaytime, u->second->awaymsg.c_str());
 249                                         this->WriteLine(data);
 250                                 }
 251                         }
 252
 253                         for(Extensible::ExtensibleStore::const_iterator i = u->second->GetExtList().begin(); i != u->second->GetExtList().end(); i++)
 254                         {
 255                                 ExtensionItem* item = i->first;
 256                                 std::string value = item->serialize(FORMAT_NETWORK, u->second, i->second);
 257                                 if (!value.empty())
 258                                         Utils->Creator->ProtoSendMetaData(this, u->second, item->name, value);
 259                         }
 260
 261                         FOREACH_MOD(I_OnSyncUser,OnSyncUser(u->second,Utils->Creator,this));
 262                 }
 263         }
 264 }
 265