src/modules/m_spanningtree/netburst.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2010 InspIRCd Development Team
   6  * See: http://wiki.inspircd.org/Credits
   7  *
   8  * This program is free but copyrighted software; see
   9  *            the file COPYING for details.
  10  *
  11  * ---------------------------------------------------
  12  */
  13
  14 #include "inspircd.h"
  15 #include "xline.h"
  16
  17 #include "treesocket.h"
  18 #include "treeserver.h"
  19 #include "utils.h"
  20 #include "main.h"
  21
  22 /** This function is called when we want to send a netburst to a local
  23  * server. There is a set order we must do this, because for example
  24  * users require their servers to exist, and channels require their
  25  * users to exist. You get the idea.
  26  */
  27 void TreeSocket::DoBurst(TreeServer* s)
  28 {
  29         std::string name = s->GetName();
  30         std::string burst = ":" + ServerInstance->Config->GetSID() + " BURST " +ConvToStr(ServerInstance->Time());
  31         std::string endburst = ":" + ServerInstance->Config->GetSID() + " ENDBURST";
  32         ServerInstance->SNO->WriteToSnoMask('l',"Bursting to \2%s\2 (Authentication: %s%s).",
  33                 name.c_str(),
  34                 capab->auth_fingerprint ? "SSL Fingerprint and " : "",
  35                 capab->auth_challenge ? "challenge-response" : "plaintext password");
  36         this->CleanNegotiationInfo();
  37         this->WriteLine(burst);
  38         /* send our version string */
  39         this->WriteLine(std::string(":")+ServerInstance->Config->GetSID()+" VERSION :"+ServerInstance->GetVersionString());
  40         /* Send server tree */
  41         this->SendServers(Utils->TreeRoot,s,1);
  42         /* Send users and their oper status */
  43         this->SendUsers(s);
  44         /* Send everything else (channel modes, xlines etc) */
  45         this->SendChannelModes(s);
  46         this->SendXLines(s);
  47         FOREACH_MOD(I_OnSyncNetwork,OnSyncNetwork(Utils->Creator,(void*)this));
  48         this->WriteLine(endburst);
  49         ServerInstance->SNO->WriteToSnoMask('l',"Finished bursting to \2"+name+"\2.");
  50 }
  51
  52 /** Recursively send the server tree with distances as hops.
  53  * This is used during network burst to inform the other server
  54  * (and any of ITS servers too) of what servers we know about.
  55  * If at any point any of these servers already exist on the other
  56  * end, our connection may be terminated. The hopcounts given
  57  * by this function are relative, this doesn't matter so long as
  58  * they are all >1, as all the remote servers re-calculate them
  59  * to be relative too, with themselves as hop 0.
  60  */
  61 void TreeSocket::SendServers(TreeServer* Current, TreeServer* s, int hops)
  62 {
  63         char command[1024];
  64         for (unsigned int q = 0; q < Current->ChildCount(); q++)
  65         {
  66                 TreeServer* recursive_server = Current->GetChild(q);
  67                 if (recursive_server != s)
  68                 {
  69                         snprintf(command,1024,":%s SERVER %s * %d %s :%s",Current->GetName().c_str(),recursive_server->GetName().c_str(),hops,
  70                                         recursive_server->GetID().c_str(),
  71                                         recursive_server->GetDesc().c_str());
  72                         this->WriteLine(command);
  73                         this->WriteLine(":"+recursive_server->GetName()+" VERSION :"+recursive_server->GetVersion());
  74                         /* down to next level */
  75                         this->SendServers(recursive_server, s, hops+1);
  76                 }
  77         }
  78 }
  79
  80 /** Send one or more FJOINs for a channel of users.
  81  * If the length of a single line is more than 480-NICKMAX
  82  * in length, it is split over multiple lines.
  83  */
  84 void TreeSocket::SendFJoins(TreeServer* Current, Channel* c)
  85 {
  86         std::string buffer;
  87         char list[MAXBUF];
  88
  89         size_t curlen, headlen;
  90         curlen = headlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu +%s :",
  91                 ServerInstance->Config->GetSID().c_str(), c->name.c_str(), (unsigned long)c->age, c->ChanModes(true));
  92         int numusers = 0;
  93         char* ptr = list + curlen;
  94         bool looped_once = false;
  95
  96         const UserMembList *ulist = c->GetUsers();
  97         std::string modes;
  98         std::string params;
  99
 100         for (UserMembCIter i = ulist->begin(); i != ulist->end(); i++)
 101         {
 102                 size_t ptrlen = 0;
 103                 std::string modestr = i->second->modes;
 104
 105                 if ((curlen + modestr.length() + i->first->uuid.length() + 4) > 480)
 106                 {
 107                         // remove the final space
 108                         if (ptr[-1] == ' ')
 109                                 ptr[-1] = '\0';
 110                         buffer.append(list).append("\r\n");
 111                         curlen = headlen;
 112                         ptr = list + headlen;
 113                         numusers = 0;
 114                 }
 115
 116                 ptrlen = snprintf(ptr, MAXBUF-curlen, "%s,%s ", modestr.c_str(), i->first->uuid.c_str());
 117
 118                 looped_once = true;
 119
 120                 curlen += ptrlen;
 121                 ptr += ptrlen;
 122
 123                 numusers++;
 124         }
 125
 126         // Okay, permanent channels will (of course) need this \r\n anyway, numusers check is if there
 127         // actually were people in the channel (looped_once == true)
 128         if (!looped_once || numusers > 0)
 129         {
 130                 // remove the final space
 131                 if (ptr[-1] == ' ')
 132                         ptr[-1] = '\0';
 133                 buffer.append(list).append("\r\n");
 134         }
 135
 136         int linesize = 1;
 137         for (BanList::iterator b = c->bans.begin(); b != c->bans.end(); b++)
 138         {
 139                 int size = b->data.length() + 2;
 140                 int currsize = linesize + size;
 141                 if (currsize <= 350)
 142                 {
 143                         modes.append("b");
 144                         params.append(" ").append(b->data);
 145                         linesize += size;
 146                 }
 147                 if ((params.length() >= ServerInstance->Config->Limits.MaxModes) || (currsize > 350))
 148                 {
 149                         /* Wrap at MAXMODES */
 150                         buffer.append(":").append(ServerInstance->Config->GetSID()).append(" FMODE ").append(c->name).append(" ").append(ConvToStr(c->age)).append(" +").append(modes).append(params).append("\r\n");
 151                         modes.clear();
 152                         params.clear();
 153                         linesize = 1;
 154                 }
 155         }
 156
 157         /* Only send these if there are any */
 158         if (!modes.empty())
 159                 buffer.append(":").append(ServerInstance->Config->GetSID()).append(" FMODE ").append(c->name).append(" ").append(ConvToStr(c->age)).append(" +").append(modes).append(params);
 160
 161         this->WriteLine(buffer);
 162 }
 163
 164 /** Send G, Q, Z and E lines */
 165 void TreeSocket::SendXLines(TreeServer* Current)
 166 {
 167         char data[MAXBUF];
 168         std::string n = ServerInstance->Config->GetSID();
 169         const char* sn = n.c_str();
 170
 171         std::vector<std::string> types = ServerInstance->XLines->GetAllTypes();
 172         time_t current = ServerInstance->Time();
 173
 174         for (std::vector<std::string>::iterator it = types.begin(); it != types.end(); ++it)
 175         {
 176                 XLineLookup* lookup = ServerInstance->XLines->GetAll(*it);
 177
 178                 if (lookup)
 179                 {
 180                         for (LookupIter i = lookup->begin(); i != lookup->end(); ++i)
 181                         {
 182                                 /* Is it burstable? this is better than an explicit check for type 'K'.
 183                                  * We break the loop as NONE of the items in this group are worth iterating.
 184                                  */
 185                                 if (!i->second->IsBurstable())
 186                                         break;
 187
 188                                 /* If it's expired, don't bother to burst it
 189                                  */
 190                                 if (i->second->duration && current > i->second->expiry)
 191                                         continue;
 192
 193                                 snprintf(data,MAXBUF,":%s ADDLINE %s %s %s %lu %lu :%s",sn, it->c_str(), i->second->Displayable(),
 194                                                 i->second->source.c_str(),
 195                                                 (unsigned long)i->second->set_time,
 196                                                 (unsigned long)i->second->duration,
 197                                                 i->second->reason.c_str());
 198                                 this->WriteLine(data);
 199                         }
 200                 }
 201         }
 202 }
 203
 204 /** Send channel modes and topics */
 205 void TreeSocket::SendChannelModes(TreeServer* Current)
 206 {
 207         char data[MAXBUF];
 208         std::deque<std::string> list;
 209         std::string n = ServerInstance->Config->GetSID();
 210         const char* sn = n.c_str();
 211         for (chan_hash::iterator c = ServerInstance->chanlist->begin(); c != ServerInstance->chanlist->end(); c++)
 212         {
 213                 SendFJoins(Current, c->second);
 214                 if (!c->second->topic.empty())
 215                 {
 216                         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());
 217                         this->WriteLine(data);
 218                 }
 219
 220                 for(Extensible::ExtensibleStore::const_iterator i = c->second->GetExtList().begin(); i != c->second->GetExtList().end(); i++)
 221                 {
 222                         ExtensionItem* item = i->first;
 223                         std::string value = item->serialize(FORMAT_NETWORK, c->second, i->second);
 224                         if (!value.empty())
 225                                 Utils->Creator->ProtoSendMetaData(this, c->second, item->name, value);
 226                 }
 227
 228                 FOREACH_MOD(I_OnSyncChannel,OnSyncChannel(c->second,Utils->Creator,this));
 229         }
 230 }
 231
 232 /** send all users and their oper state/modes */
 233 void TreeSocket::SendUsers(TreeServer* Current)
 234 {
 235         char data[MAXBUF];
 236         std::string dataline;
 237         for (user_hash::iterator u = ServerInstance->Users->clientlist->begin(); u != ServerInstance->Users->clientlist->end(); u++)
 238         {
 239                 if (u->second->registered == REG_ALL)
 240                 {
 241                         TreeServer* theirserver = Utils->FindServer(u->second->server);
 242                         if (theirserver)
 243                         {
 244                                 snprintf(data,MAXBUF,":%s UID %s %lu %s %s %s %s %s %lu +%s :%s",
 245                                                 theirserver->GetID().c_str(),   /* Prefix: SID */
 246                                                 u->second->uuid.c_str(),        /* 0: UUID */
 247                                                 (unsigned long)u->second->age,  /* 1: TS */
 248                                                 u->second->nick.c_str(),        /* 2: Nick */
 249                                                 u->second->host.c_str(),        /* 3: Displayed Host */
 250                                                 u->second->dhost.c_str(),       /* 4: Real host */
 251                                                 u->second->ident.c_str(),       /* 5: Ident */
 252                                                 u->second->GetIPString(),       /* 6: IP string */
 253                                                 (unsigned long)u->second->signon, /* 7: Signon time for WHOWAS */
 254                                                 u->second->FormatModes(true),   /* 8...n: Modes and params */
 255                                                 u->second->fullname.c_str());   /* size-1: GECOS */
 256                                 this->WriteLine(data);
 257                                 if (IS_OPER(u->second))
 258                                 {
 259                                         snprintf(data,MAXBUF,":%s OPERTYPE %s", u->second->uuid.c_str(), u->second->oper->name.c_str());
 260                                         this->WriteLine(data);
 261                                 }
 262                                 if (IS_AWAY(u->second))
 263                                 {
 264                                         snprintf(data,MAXBUF,":%s AWAY %ld :%s", u->second->uuid.c_str(), (long)u->second->awaytime, u->second->awaymsg.c_str());
 265                                         this->WriteLine(data);
 266                                 }
 267                         }
 268
 269                         for(Extensible::ExtensibleStore::const_iterator i = u->second->GetExtList().begin(); i != u->second->GetExtList().end(); i++)
 270                         {
 271                                 ExtensionItem* item = i->first;
 272                                 std::string value = item->serialize(FORMAT_NETWORK, u->second, i->second);
 273                                 if (!value.empty())
 274                                         Utils->Creator->ProtoSendMetaData(this, u->second, item->name, value);
 275                         }
 276
 277                         FOREACH_MOD(I_OnSyncUser,OnSyncUser(u->second,Utils->Creator,this));
 278                 }
 279         }
 280 }
 281