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
  25 #include "treesocket.h"
  26 #include "treeserver.h"
  27 #include "utils.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         /* Send everything else (channel modes, xlines etc) */
  51         this->SendChannelModes();
  52         this->SendXLines();
  53         FOREACH_MOD(I_OnSyncNetwork,OnSyncNetwork(Utils->Creator,(void*)this));
  54         this->WriteLine(":" + ServerInstance->Config->GetSID() + " ENDBURST");
  55         ServerInstance->SNO->WriteToSnoMask('l',"Finished bursting to \2"+ s->GetName()+"\2.");
  56 }
  57
  58 /** Recursively send the server tree with distances as hops.
  59  * This is used during network burst to inform the other server
  60  * (and any of ITS servers too) of what servers we know about.
  61  * If at any point any of these servers already exist on the other
  62  * end, our connection may be terminated. The hopcounts given
  63  * by this function are relative, this doesn't matter so long as
  64  * they are all >1, as all the remote servers re-calculate them
  65  * to be relative too, with themselves as hop 0.
  66  */
  67 void TreeSocket::SendServers(TreeServer* Current, TreeServer* s, int hops)
  68 {
  69         char command[MAXBUF];
  70         for (unsigned int q = 0; q < Current->ChildCount(); q++)
  71         {
  72                 TreeServer* recursive_server = Current->GetChild(q);
  73                 if (recursive_server != s)
  74                 {
  75                         std::string recursive_servername = recursive_server->GetName();
  76                         snprintf(command, MAXBUF, ":%s SERVER %s * %d %s :%s", Current->GetID().c_str(), recursive_servername.c_str(), hops,
  77                                         recursive_server->GetID().c_str(),
  78                                         recursive_server->GetDesc().c_str());
  79                         this->WriteLine(command);
  80                         this->WriteLine(":"+recursive_server->GetID()+" VERSION :"+recursive_server->GetVersion());
  81                         /* down to next level */
  82                         this->SendServers(recursive_server, s, hops+1);
  83                 }
  84         }
  85 }
  86
  87 /** Send one or more FJOINs for a channel of users.
  88  * If the length of a single line is more than 480-NICKMAX
  89  * in length, it is split over multiple lines.
  90  */
  91 void TreeSocket::SendFJoins(Channel* c)
  92 {
  93         std::string buffer;
  94         char list[MAXBUF];
  95
  96         size_t curlen, headlen;
  97         curlen = headlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu +%s :",
  98                 ServerInstance->Config->GetSID().c_str(), c->name.c_str(), (unsigned long)c->age, c->ChanModes(true));
  99         int numusers = 0;
 100         char* ptr = list + curlen;
 101         bool looped_once = false;
 102
 103         const UserMembList *ulist = c->GetUsers();
 104         std::string modes;
 105         std::string params;
 106
 107         for (UserMembCIter i = ulist->begin(); i != ulist->end(); i++)
 108         {
 109                 size_t ptrlen = 0;
 110                 std::string modestr = i->second->modes;
 111
 112                 if ((curlen + modestr.length() + i->first->uuid.length() + 4) > 480)
 113                 {
 114                         // remove the final space
 115                         if (ptr[-1] == ' ')
 116                                 ptr[-1] = '\0';
 117                         buffer.append(list).append("\r\n");
 118                         curlen = headlen;
 119                         ptr = list + headlen;
 120                         numusers = 0;
 121                 }
 122
 123                 ptrlen = snprintf(ptr, MAXBUF-curlen, "%s,%s ", modestr.c_str(), i->first->uuid.c_str());
 124
 125                 looped_once = true;
 126
 127                 curlen += ptrlen;
 128                 ptr += ptrlen;
 129
 130                 numusers++;
 131         }
 132
 133         // Okay, permanent channels will (of course) need this \r\n anyway, numusers check is if there
 134         // actually were people in the channel (looped_once == true)
 135         if (!looped_once || numusers > 0)
 136         {
 137                 // remove the final space
 138                 if (ptr[-1] == ' ')
 139                         ptr[-1] = '\0';
 140                 buffer.append(list).append("\r\n");
 141         }
 142
 143         int linesize = 1;
 144         for (BanList::iterator b = c->bans.begin(); b != c->bans.end(); b++)
 145         {
 146                 int size = b->data.length() + 2;
 147                 int currsize = linesize + size;
 148                 if (currsize <= 350)
 149                 {
 150                         modes.append("b");
 151                         params.append(" ").append(b->data);
 152                         linesize += size;
 153                 }
 154                 if ((modes.length() >= ServerInstance->Config->Limits.MaxModes) || (currsize > 350))
 155                 {
 156                         /* Wrap at MAXMODES */
 157                         buffer.append(":").append(ServerInstance->Config->GetSID()).append(" FMODE ").append(c->name).append(" ").append(ConvToStr(c->age)).append(" +").append(modes).append(params).append("\r\n");
 158                         modes.clear();
 159                         params.clear();
 160                         linesize = 1;
 161                 }
 162         }
 163
 164         /* Only send these if there are any */
 165         if (!modes.empty())
 166                 buffer.append(":").append(ServerInstance->Config->GetSID()).append(" FMODE ").append(c->name).append(" ").append(ConvToStr(c->age)).append(" +").append(modes).append(params);
 167
 168         this->WriteLine(buffer);
 169 }
 170
 171 /** Send all XLines we know about */
 172 void TreeSocket::SendXLines()
 173 {
 174         char data[MAXBUF];
 175         std::string n = ServerInstance->Config->GetSID();
 176         const char* sn = n.c_str();
 177
 178         std::vector<std::string> types = ServerInstance->XLines->GetAllTypes();
 179         time_t current = ServerInstance->Time();
 180
 181         for (std::vector<std::string>::iterator it = types.begin(); it != types.end(); ++it)
 182         {
 183                 XLineLookup* lookup = ServerInstance->XLines->GetAll(*it);
 184
 185                 if (lookup)
 186                 {
 187                         for (LookupIter i = lookup->begin(); i != lookup->end(); ++i)
 188                         {
 189                                 /* Is it burstable? this is better than an explicit check for type 'K'.
 190                                  * We break the loop as NONE of the items in this group are worth iterating.
 191                                  */
 192                                 if (!i->second->IsBurstable())
 193                                         break;
 194
 195                                 /* If it's expired, don't bother to burst it
 196                                  */
 197                                 if (i->second->duration && current > i->second->expiry)
 198                                         continue;
 199
 200                                 snprintf(data,MAXBUF,":%s ADDLINE %s %s %s %lu %lu :%s",sn, it->c_str(), i->second->Displayable(),
 201                                                 i->second->source.c_str(),
 202                                                 (unsigned long)i->second->set_time,
 203                                                 (unsigned long)i->second->duration,
 204                                                 i->second->reason.c_str());
 205                                 this->WriteLine(data);
 206                         }
 207                 }
 208         }
 209 }
 210
 211 /** Send channel topic, modes and metadata */
 212 void TreeSocket::SendChannelModes()
 213 {
 214         char data[MAXBUF];
 215         std::string n = ServerInstance->Config->GetSID();
 216         const char* sn = n.c_str();
 217
 218         for (chan_hash::iterator c = ServerInstance->chanlist->begin(); c != ServerInstance->chanlist->end(); c++)
 219         {
 220                 SendFJoins(c->second);
 221                 if (!c->second->topic.empty())
 222                 {
 223                         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());
 224                         this->WriteLine(data);
 225                 }
 226
 227                 for(Extensible::ExtensibleStore::const_iterator i = c->second->GetExtList().begin(); i != c->second->GetExtList().end(); i++)
 228                 {
 229                         ExtensionItem* item = i->first;
 230                         std::string value = item->serialize(FORMAT_NETWORK, c->second, i->second);
 231                         if (!value.empty())
 232                                 Utils->Creator->ProtoSendMetaData(this, c->second, item->name, value);
 233                 }
 234
 235                 FOREACH_MOD(I_OnSyncChannel,OnSyncChannel(c->second,Utils->Creator,this));
 236         }
 237 }
 238
 239 /** send all users and their oper state/modes */
 240 void TreeSocket::SendUsers()
 241 {
 242         char data[MAXBUF];
 243         std::string dataline;
 244         for (user_hash::iterator u = ServerInstance->Users->clientlist->begin(); u != ServerInstance->Users->clientlist->end(); u++)
 245         {
 246                 if (u->second->registered == REG_ALL)
 247                 {
 248                         TreeServer* theirserver = Utils->FindServer(u->second->server);
 249                         if (theirserver)
 250                         {
 251                                 snprintf(data,MAXBUF,":%s UID %s %lu %s %s %s %s %s %lu +%s :%s",
 252                                                 theirserver->GetID().c_str(),   /* Prefix: SID */
 253                                                 u->second->uuid.c_str(),        /* 0: UUID */
 254                                                 (unsigned long)u->second->age,  /* 1: TS */
 255                                                 u->second->nick.c_str(),        /* 2: Nick */
 256                                                 u->second->host.c_str(),        /* 3: Displayed Host */
 257                                                 u->second->dhost.c_str(),       /* 4: Real host */
 258                                                 u->second->ident.c_str(),       /* 5: Ident */
 259                                                 u->second->GetIPString(),       /* 6: IP string */
 260                                                 (unsigned long)u->second->signon, /* 7: Signon time for WHOWAS */
 261                                                 u->second->FormatModes(true),   /* 8...n: Modes and params */
 262                                                 u->second->fullname.c_str());   /* size-1: GECOS */
 263                                 this->WriteLine(data);
 264                                 if (IS_OPER(u->second))
 265                                 {
 266                                         snprintf(data,MAXBUF,":%s OPERTYPE %s", u->second->uuid.c_str(), u->second->oper->name.c_str());
 267                                         this->WriteLine(data);
 268                                 }
 269                                 if (IS_AWAY(u->second))
 270                                 {
 271                                         snprintf(data,MAXBUF,":%s AWAY %ld :%s", u->second->uuid.c_str(), (long)u->second->awaytime, u->second->awaymsg.c_str());
 272                                         this->WriteLine(data);
 273                                 }
 274                         }
 275
 276                         for(Extensible::ExtensibleStore::const_iterator i = u->second->GetExtList().begin(); i != u->second->GetExtList().end(); i++)
 277                         {
 278                                 ExtensionItem* item = i->first;
 279                                 std::string value = item->serialize(FORMAT_NETWORK, u->second, i->second);
 280                                 if (!value.empty())
 281                                         Utils->Creator->ProtoSendMetaData(this, u->second, item->name, value);
 282                         }
 283
 284                         FOREACH_MOD(I_OnSyncUser,OnSyncUser(u->second,Utils->Creator,this));
 285                 }
 286         }
 287 }
 288