src/modules/m_spanningtree/netburst.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2009 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 /* $ModDep: m_spanningtree/utils.h m_spanningtree/treeserver.h m_spanningtree/treesocket.h */
  23
  24
  25 /** This function is called when we want to send a netburst to a local
  26  * server. There is a set order we must do this, because for example
  27  * users require their servers to exist, and channels require their
  28  * users to exist. You get the idea.
  29  */
  30 void TreeSocket::DoBurst(TreeServer* s)
  31 {
  32         std::string name = s->GetName();
  33         std::string burst = ":" + ServerInstance->Config->GetSID() + " BURST " +ConvToStr(ServerInstance->Time());
  34         std::string endburst = ":" + ServerInstance->Config->GetSID() + " ENDBURST";
  35         ServerInstance->SNO->WriteToSnoMask('l',"Bursting to \2%s\2 (Authentication: %s%s).",
  36                 name.c_str(),
  37                 this->auth_fingerprint ? "SSL Fingerprint and " : "",
  38                 this->auth_challenge ? "challenge-response" : "plaintext password");
  39         this->CleanNegotiationInfo();
  40         this->WriteLine(burst);
  41         /* send our version string */
  42         this->WriteLine(std::string(":")+ServerInstance->Config->GetSID()+" VERSION :"+ServerInstance->GetVersionString());
  43         /* Send server tree */
  44         this->SendServers(Utils->TreeRoot,s,1);
  45         /* Send users and their oper status */
  46         this->SendUsers(s);
  47         /* Send everything else (channel modes, xlines etc) */
  48         this->SendChannelModes(s);
  49         this->SendXLines(s);
  50         FOREACH_MOD(I_OnSyncNetwork,OnSyncNetwork(Utils->Creator,(void*)this));
  51         this->WriteLine(endburst);
  52         ServerInstance->SNO->WriteToSnoMask('l',"Finished bursting to \2"+name+"\2.");
  53 }
  54
  55 /** Recursively send the server tree with distances as hops.
  56  * This is used during network burst to inform the other server
  57  * (and any of ITS servers too) of what servers we know about.
  58  * If at any point any of these servers already exist on the other
  59  * end, our connection may be terminated. The hopcounts given
  60  * by this function are relative, this doesn't matter so long as
  61  * they are all >1, as all the remote servers re-calculate them
  62  * to be relative too, with themselves as hop 0.
  63  */
  64 void TreeSocket::SendServers(TreeServer* Current, TreeServer* s, int hops)
  65 {
  66         char command[1024];
  67         for (unsigned int q = 0; q < Current->ChildCount(); q++)
  68         {
  69                 TreeServer* recursive_server = Current->GetChild(q);
  70                 if (recursive_server != s)
  71                 {
  72                         snprintf(command,1024,":%s SERVER %s * %d %s :%s",Current->GetName().c_str(),recursive_server->GetName().c_str(),hops,
  73                                         recursive_server->GetID().c_str(),
  74                                         recursive_server->GetDesc().c_str());
  75                         this->WriteLine(command);
  76                         this->WriteLine(":"+recursive_server->GetName()+" VERSION :"+recursive_server->GetVersion());
  77                         /* down to next level */
  78                         this->SendServers(recursive_server, s, hops+1);
  79                 }
  80         }
  81 }
  82
  83 /** Send one or more FJOINs for a channel of users.
  84  * If the length of a single line is more than 480-NICKMAX
  85  * in length, it is split over multiple lines.
  86  */
  87 void TreeSocket::SendFJoins(TreeServer* Current, Channel* c)
  88 {
  89         std::string buffer;
  90         char list[MAXBUF];
  91
  92         size_t curlen, headlen;
  93         curlen = headlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu +%s :",
  94                 ServerInstance->Config->GetSID().c_str(), c->name.c_str(), (unsigned long)c->age, c->ChanModes(true));
  95         int numusers = 0;
  96         char* ptr = list + curlen;
  97         bool looped_once = false;
  98
  99         const UserMembList *ulist = c->GetUsers();
 100         std::string modes;
 101         std::string params;
 102
 103         for (UserMembCIter i = ulist->begin(); i != ulist->end(); i++)
 104         {
 105                 size_t ptrlen = 0;
 106                 std::string modestr = i->second->modes;
 107
 108                 if ((curlen + modestr.length() + i->first->uuid.length() + 4) > 480)
 109                 {
 110                         // remove the final space
 111                         if (ptr[-1] == ' ')
 112                                 ptr[-1] = '\0';
 113                         buffer.append(list).append("\r\n");
 114                         curlen = headlen;
 115                         ptr = list + headlen;
 116                         numusers = 0;
 117                 }
 118
 119                 ptrlen = snprintf(ptr, MAXBUF-curlen, "%s,%s ", modestr.c_str(), i->first->uuid.c_str());
 120
 121                 looped_once = true;
 122
 123                 curlen += ptrlen;
 124                 ptr += ptrlen;
 125
 126                 numusers++;
 127         }
 128
 129         // Okay, permanent channels will (of course) need this \r\n anyway, numusers check is if there
 130         // actually were people in the channel (looped_once == true)
 131         if (!looped_once || numusers > 0)
 132         {
 133                 // remove the final space
 134                 if (ptr[-1] == ' ')
 135                         ptr[-1] = '\0';
 136                 buffer.append(list).append("\r\n");
 137         }
 138
 139         int linesize = 1;
 140         for (BanList::iterator b = c->bans.begin(); b != c->bans.end(); b++)
 141         {
 142                 int size = b->data.length() + 2;
 143                 int currsize = linesize + size;
 144                 if (currsize <= 350)
 145                 {
 146                         modes.append("b");
 147                         params.append(" ").append(b->data);
 148                         linesize += size;
 149                 }
 150                 if ((params.length() >= ServerInstance->Config->Limits.MaxModes) || (currsize > 350))
 151                 {
 152                         /* Wrap at MAXMODES */
 153                         buffer.append(":").append(ServerInstance->Config->GetSID()).append(" FMODE ").append(c->name).append(" ").append(ConvToStr(c->age)).append(" +").append(modes).append(params).append("\r\n");
 154                         modes.clear();
 155                         params.clear();
 156                         linesize = 1;
 157                 }
 158         }
 159
 160         /* Only send these if there are any */
 161         if (!modes.empty())
 162                 buffer.append(":").append(ServerInstance->Config->GetSID()).append(" FMODE ").append(c->name).append(" ").append(ConvToStr(c->age)).append(" +").append(modes).append(params);
 163
 164         this->WriteLine(buffer);
 165 }
 166
 167 /** Send G, Q, Z and E lines */
 168 void TreeSocket::SendXLines(TreeServer* Current)
 169 {
 170         char data[MAXBUF];
 171         std::string n = ServerInstance->Config->GetSID();
 172         const char* sn = n.c_str();
 173
 174         std::vector<std::string> types = ServerInstance->XLines->GetAllTypes();
 175         time_t current = ServerInstance->Time();
 176
 177         for (std::vector<std::string>::iterator it = types.begin(); it != types.end(); ++it)
 178         {
 179                 XLineLookup* lookup = ServerInstance->XLines->GetAll(*it);
 180
 181                 if (lookup)
 182                 {
 183                         for (LookupIter i = lookup->begin(); i != lookup->end(); ++i)
 184                         {
 185                                 /* Is it burstable? this is better than an explicit check for type 'K'.
 186                                  * We break the loop as NONE of the items in this group are worth iterating.
 187                                  */
 188                                 if (!i->second->IsBurstable())
 189                                         break;
 190
 191                                 /* If it's expired, don't bother to burst it
 192                                  */
 193                                 if (i->second->duration && current > i->second->expiry)
 194                                         continue;
 195
 196                                 snprintf(data,MAXBUF,":%s ADDLINE %s %s %s %lu %lu :%s",sn, it->c_str(), i->second->Displayable(),
 197                                                 i->second->source.c_str(),
 198                                                 (unsigned long)i->second->set_time,
 199                                                 (unsigned long)i->second->duration,
 200                                                 i->second->reason.c_str());
 201                                 this->WriteLine(data);
 202                         }
 203                 }
 204         }
 205 }
 206
 207 /** Send channel modes and topics */
 208 void TreeSocket::SendChannelModes(TreeServer* Current)
 209 {
 210         char data[MAXBUF];
 211         std::deque<std::string> list;
 212         std::string n = ServerInstance->Config->GetSID();
 213         const char* sn = n.c_str();
 214         for (chan_hash::iterator c = ServerInstance->chanlist->begin(); c != ServerInstance->chanlist->end(); c++)
 215         {
 216                 SendFJoins(Current, c->second);
 217                 if (!c->second->topic.empty())
 218                 {
 219                         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());
 220                         this->WriteLine(data);
 221                 }
 222
 223                 for(Extensible::ExtensibleStore::const_iterator i = c->second->GetExtList().begin(); i != c->second->GetExtList().end(); i++)
 224                 {
 225                         ExtensionItem* item = i->first;
 226                         std::string value = item->serialize(FORMAT_NETWORK, c->second, i->second);
 227                         if (!value.empty())
 228                                 Utils->Creator->ProtoSendMetaData(this, c->second, item->key, value);
 229                 }
 230
 231                 FOREACH_MOD(I_OnSyncChannel,OnSyncChannel(c->second,Utils->Creator,this));
 232         }
 233 }
 234
 235 /** send all users and their oper state/modes */
 236 void TreeSocket::SendUsers(TreeServer* Current)
 237 {
 238         char data[MAXBUF];
 239         std::string dataline;
 240         for (user_hash::iterator u = ServerInstance->Users->clientlist->begin(); u != ServerInstance->Users->clientlist->end(); u++)
 241         {
 242                 if (u->second->registered == REG_ALL)
 243                 {
 244                         TreeServer* theirserver = Utils->FindServer(u->second->server);
 245                         if (theirserver)
 246                         {
 247                                 snprintf(data,MAXBUF,":%s UID %s %lu %s %s %s %s %s %lu +%s :%s",
 248                                                 theirserver->GetID().c_str(),   /* Prefix: SID */
 249                                                 u->second->uuid.c_str(),        /* 0: UUID */
 250                                                 (unsigned long)u->second->age,  /* 1: TS */
 251                                                 u->second->nick.c_str(),        /* 2: Nick */
 252                                                 u->second->host.c_str(),        /* 3: Displayed Host */
 253                                                 u->second->dhost.c_str(),       /* 4: Real host */
 254                                                 u->second->ident.c_str(),       /* 5: Ident */
 255                                                 u->second->GetIPString(),       /* 6: IP string */
 256                                                 (unsigned long)u->second->signon, /* 7: Signon time for WHOWAS */
 257                                                 u->second->FormatModes(true),   /* 8...n: Modes and params */
 258                                                 u->second->fullname.c_str());   /* size-1: GECOS */
 259                                 this->WriteLine(data);
 260                                 if (IS_OPER(u->second))
 261                                 {
 262                                         snprintf(data,MAXBUF,":%s OPERTYPE %s", u->second->uuid.c_str(), u->second->oper->name.c_str());
 263                                         this->WriteLine(data);
 264                                 }
 265                                 if (IS_AWAY(u->second))
 266                                 {
 267                                         snprintf(data,MAXBUF,":%s AWAY %ld :%s", u->second->uuid.c_str(), (long)u->second->awaytime, u->second->awaymsg.c_str());
 268                                         this->WriteLine(data);
 269                                 }
 270                         }
 271
 272                         for(Extensible::ExtensibleStore::const_iterator i = u->second->GetExtList().begin(); i != u->second->GetExtList().end(); i++)
 273                         {
 274                                 ExtensionItem* item = i->first;
 275                                 std::string value = item->serialize(FORMAT_NETWORK, u->second, i->second);
 276                                 if (!value.empty())
 277                                         Utils->Creator->ProtoSendMetaData(this, u->second, item->key, value);
 278                         }
 279
 280                         FOREACH_MOD(I_OnSyncUser,OnSyncUser(u->second,Utils->Creator,this));
 281                 }
 282         }
 283 }
 284