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 name = s->GetName();
  38         std::string burst = ":" + ServerInstance->Config->GetSID() + " BURST " +ConvToStr(ServerInstance->Time());
  39         std::string endburst = ":" + ServerInstance->Config->GetSID() + " ENDBURST";
  40         ServerInstance->SNO->WriteToSnoMask('l',"Bursting to \2%s\2 (Authentication: %s%s).",
  41                 name.c_str(),
  42                 capab->auth_fingerprint ? "SSL Fingerprint and " : "",
  43                 capab->auth_challenge ? "challenge-response" : "plaintext password");
  44         this->CleanNegotiationInfo();
  45         this->WriteLine(burst);
  46         /* send our version string */
  47         this->WriteLine(std::string(":")+ServerInstance->Config->GetSID()+" VERSION :"+ServerInstance->GetVersionString());
  48         /* Send server tree */
  49         this->SendServers(Utils->TreeRoot,s,1);
  50         /* Send users and their oper status */
  51         this->SendUsers(s);
  52         /* Send everything else (channel modes, xlines etc) */
  53         this->SendChannelModes(s);
  54         this->SendXLines(s);
  55         FOREACH_MOD(I_OnSyncNetwork,OnSyncNetwork(Utils->Creator,(void*)this));
  56         this->WriteLine(endburst);
  57         ServerInstance->SNO->WriteToSnoMask('l',"Finished bursting to \2"+name+"\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[1024];
  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                         snprintf(command,1024,":%s SERVER %s * %d %s :%s",Current->GetName().c_str(),recursive_server->GetName().c_str(),hops,
  78                                         recursive_server->GetID().c_str(),
  79                                         recursive_server->GetDesc().c_str());
  80                         this->WriteLine(command);
  81                         this->WriteLine(":"+recursive_server->GetName()+" 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(TreeServer* Current, 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         int linesize = 1;
 145         for (BanList::iterator b = c->bans.begin(); b != c->bans.end(); b++)
 146         {
 147                 int size = b->data.length() + 2;
 148                 int currsize = linesize + size;
 149                 if (currsize <= 350)
 150                 {
 151                         modes.append("b");
 152                         params.append(" ").append(b->data);
 153                         linesize += size;
 154                 }
 155                 if ((modes.length() >= ServerInstance->Config->Limits.MaxModes) || (currsize > 350))
 156                 {
 157                         /* Wrap at MAXMODES */
 158                         buffer.append(":").append(ServerInstance->Config->GetSID()).append(" FMODE ").append(c->name).append(" ").append(ConvToStr(c->age)).append(" +").append(modes).append(params).append("\r\n");
 159                         modes.clear();
 160                         params.clear();
 161                         linesize = 1;
 162                 }
 163         }
 164
 165         /* Only send these if there are any */
 166         if (!modes.empty())
 167                 buffer.append(":").append(ServerInstance->Config->GetSID()).append(" FMODE ").append(c->name).append(" ").append(ConvToStr(c->age)).append(" +").append(modes).append(params);
 168
 169         this->WriteLine(buffer);
 170 }
 171
 172 /** Send G, Q, Z and E lines */
 173 void TreeSocket::SendXLines(TreeServer* Current)
 174 {
 175         char data[MAXBUF];
 176         std::string n = ServerInstance->Config->GetSID();
 177         const char* sn = n.c_str();
 178
 179         std::vector<std::string> types = ServerInstance->XLines->GetAllTypes();
 180         time_t current = ServerInstance->Time();
 181
 182         for (std::vector<std::string>::iterator it = types.begin(); it != types.end(); ++it)
 183         {
 184                 XLineLookup* lookup = ServerInstance->XLines->GetAll(*it);
 185
 186                 if (lookup)
 187                 {
 188                         for (LookupIter i = lookup->begin(); i != lookup->end(); ++i)
 189                         {
 190                                 /* Is it burstable? this is better than an explicit check for type 'K'.
 191                                  * We break the loop as NONE of the items in this group are worth iterating.
 192                                  */
 193                                 if (!i->second->IsBurstable())
 194                                         break;
 195
 196                                 /* If it's expired, don't bother to burst it
 197                                  */
 198                                 if (i->second->duration && current > i->second->expiry)
 199                                         continue;
 200
 201                                 snprintf(data,MAXBUF,":%s ADDLINE %s %s %s %lu %lu :%s",sn, it->c_str(), i->second->Displayable(),
 202                                                 i->second->source.c_str(),
 203                                                 (unsigned long)i->second->set_time,
 204                                                 (unsigned long)i->second->duration,
 205                                                 i->second->reason.c_str());
 206                                 this->WriteLine(data);
 207                         }
 208                 }
 209         }
 210 }
 211
 212 /** Send channel modes and topics */
 213 void TreeSocket::SendChannelModes(TreeServer* Current)
 214 {
 215         char data[MAXBUF];
 216         std::deque<std::string> list;
 217         std::string n = ServerInstance->Config->GetSID();
 218         const char* sn = n.c_str();
 219         for (chan_hash::iterator c = ServerInstance->chanlist->begin(); c != ServerInstance->chanlist->end(); c++)
 220         {
 221                 SendFJoins(Current, c->second);
 222                 if (!c->second->topic.empty())
 223                 {
 224                         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());
 225                         this->WriteLine(data);
 226                 }
 227
 228                 for(Extensible::ExtensibleStore::const_iterator i = c->second->GetExtList().begin(); i != c->second->GetExtList().end(); i++)
 229                 {
 230                         ExtensionItem* item = i->first;
 231                         std::string value = item->serialize(FORMAT_NETWORK, c->second, i->second);
 232                         if (!value.empty())
 233                                 Utils->Creator->ProtoSendMetaData(this, c->second, item->name, value);
 234                 }
 235
 236                 FOREACH_MOD(I_OnSyncChannel,OnSyncChannel(c->second,Utils->Creator,this));
 237         }
 238 }
 239
 240 /** send all users and their oper state/modes */
 241 void TreeSocket::SendUsers(TreeServer* Current)
 242 {
 243         char data[MAXBUF];
 244         std::string dataline;
 245         for (user_hash::iterator u = ServerInstance->Users->clientlist->begin(); u != ServerInstance->Users->clientlist->end(); u++)
 246         {
 247                 if (u->second->registered == REG_ALL)
 248                 {
 249                         TreeServer* theirserver = Utils->FindServer(u->second->server);
 250                         if (theirserver)
 251                         {
 252                                 snprintf(data,MAXBUF,":%s UID %s %lu %s %s %s %s %s %lu +%s :%s",
 253                                                 theirserver->GetID().c_str(),   /* Prefix: SID */
 254                                                 u->second->uuid.c_str(),        /* 0: UUID */
 255                                                 (unsigned long)u->second->age,  /* 1: TS */
 256                                                 u->second->nick.c_str(),        /* 2: Nick */
 257                                                 u->second->host.c_str(),        /* 3: Displayed Host */
 258                                                 u->second->dhost.c_str(),       /* 4: Real host */
 259                                                 u->second->ident.c_str(),       /* 5: Ident */
 260                                                 u->second->GetIPString(),       /* 6: IP string */
 261                                                 (unsigned long)u->second->signon, /* 7: Signon time for WHOWAS */
 262                                                 u->second->FormatModes(true),   /* 8...n: Modes and params */
 263                                                 u->second->fullname.c_str());   /* size-1: GECOS */
 264                                 this->WriteLine(data);
 265                                 if (IS_OPER(u->second))
 266                                 {
 267                                         snprintf(data,MAXBUF,":%s OPERTYPE %s", u->second->uuid.c_str(), u->second->oper->name.c_str());
 268                                         this->WriteLine(data);
 269                                 }
 270                                 if (IS_AWAY(u->second))
 271                                 {
 272                                         snprintf(data,MAXBUF,":%s AWAY %ld :%s", u->second->uuid.c_str(), (long)u->second->awaytime, u->second->awaymsg.c_str());
 273                                         this->WriteLine(data);
 274                                 }
 275                         }
 276
 277                         for(Extensible::ExtensibleStore::const_iterator i = u->second->GetExtList().begin(); i != u->second->GetExtList().end(); i++)
 278                         {
 279                                 ExtensionItem* item = i->first;
 280                                 std::string value = item->serialize(FORMAT_NETWORK, u->second, i->second);
 281                                 if (!value.empty())
 282                                         Utils->Creator->ProtoSendMetaData(this, u->second, item->name, value);
 283                         }
 284
 285                         FOREACH_MOD(I_OnSyncUser,OnSyncUser(u->second,Utils->Creator,this));
 286                 }
 287         }
 288 }
 289