src/modules/m_spanningtree/netburst.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2008 InspIRCd Development Team
   6  * See: http://www.inspircd.org/wiki/index.php/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 "m_spanningtree/treesocket.h"
  18 #include "m_spanningtree/treeserver.h"
  19 #include "m_spanningtree/utils.h"
  20
  21 /* $ModDep: m_spanningtree/utils.h m_spanningtree/treeserver.h m_spanningtree/treesocket.h */
  22
  23
  24 /** This function is called when we want to send a netburst to a local
  25  * server. There is a set order we must do this, because for example
  26  * users require their servers to exist, and channels require their
  27  * users to exist. You get the idea.
  28  */
  29 void TreeSocket::DoBurst(TreeServer* s)
  30 {
  31         std::string name = s->GetName();
  32         std::string burst = ":" + this->Instance->Config->GetSID() + " BURST " +ConvToStr(Instance->Time());
  33         std::string endburst = ":" + this->Instance->Config->GetSID() + " ENDBURST";
  34         this->Instance->SNO->WriteToSnoMask('l',"Bursting to \2%s\2 (Authentication: %s).", name.c_str(), this->GetTheirChallenge().empty() ? "plaintext password" : "SHA256-HMAC challenge-response");
  35         this->WriteLine(burst);
  36         /* send our version string */
  37         this->WriteLine(std::string(":")+this->Instance->Config->GetSID()+" VERSION :"+this->Instance->GetVersionString());
  38         /* Send server tree */
  39         this->SendServers(Utils->TreeRoot,s,1);
  40         /* Send users and their oper status */
  41         this->SendUsers(s);
  42         /* Send everything else (channel modes, xlines etc) */
  43         this->SendChannelModes(s);
  44         this->SendXLines(s);
  45         FOREACH_MOD_I(this->Instance,I_OnSyncOtherMetaData,OnSyncOtherMetaData((Module*)Utils->Creator,(void*)this));
  46         this->WriteLine(endburst);
  47         this->Instance->SNO->WriteToSnoMask('l',"Finished bursting to \2"+name+"\2.");
  48 }
  49
  50 /** Recursively send the server tree with distances as hops.
  51  * This is used during network burst to inform the other server
  52  * (and any of ITS servers too) of what servers we know about.
  53  * If at any point any of these servers already exist on the other
  54  * end, our connection may be terminated. The hopcounts given
  55  * by this function are relative, this doesn't matter so long as
  56  * they are all >1, as all the remote servers re-calculate them
  57  * to be relative too, with themselves as hop 0.
  58  */
  59 void TreeSocket::SendServers(TreeServer* Current, TreeServer* s, int hops)
  60 {
  61         char command[1024];
  62         for (unsigned int q = 0; q < Current->ChildCount(); q++)
  63         {
  64                 TreeServer* recursive_server = Current->GetChild(q);
  65                 if (recursive_server != s)
  66                 {
  67                         snprintf(command,1024,":%s SERVER %s * %d %s :%s",Current->GetName().c_str(),recursive_server->GetName().c_str(),hops,
  68                                         recursive_server->GetID().c_str(),
  69                                         recursive_server->GetDesc().c_str());
  70                         this->WriteLine(command);
  71                         this->WriteLine(":"+recursive_server->GetName()+" VERSION :"+recursive_server->GetVersion());
  72                         /* down to next level */
  73                         this->SendServers(recursive_server, s, hops+1);
  74                 }
  75         }
  76 }
  77
  78 /** Send one or more FJOINs for a channel of users.
  79  * If the length of a single line is more than 480-NICKMAX
  80  * in length, it is split over multiple lines.
  81  */
  82 void TreeSocket::SendFJoins(TreeServer* Current, Channel* c)
  83 {
  84         std::string buffer;
  85         char list[MAXBUF];
  86
  87         size_t dlen, curlen;
  88         dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu +%s", this->Instance->Config->GetSID().c_str(), c->name.c_str(),(unsigned long)c->age, c->ChanModes(true));
  89         int numusers = 0;
  90         char* ptr = list + dlen;
  91         bool looped_once = false;
  92
  93         CUList *ulist = c->GetUsers();
  94         std::string modes;
  95         std::string params;
  96
  97         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
  98         {
  99                 size_t ptrlen = 0;
 100                 std::string modestr = this->Instance->Modes->ModeString(i->first, c, false);
 101
 102                 if ((curlen + modestr.length() + i->first->uuid.length() + 4) > 480)
 103                 {
 104                         buffer.append(list).append("\r\n");
 105                         dlen = curlen = snprintf(list, MAXBUF, ":%s FJOIN %s %lu +%s", this->Instance->Config->GetSID().c_str(), c->name.c_str(), (unsigned long)c->age, c->ChanModes(true));
 106                         ptr = list + dlen;
 107                         numusers = 0;
 108                 }
 109
 110                 // The first parameter gets a : before it
 111                 ptrlen = snprintf(ptr, MAXBUF, " %s%s,%s", !numusers ? ":" : "", modestr.c_str(), i->first->uuid.c_str());
 112
 113                 looped_once = true;
 114
 115                 curlen += ptrlen;
 116                 ptr += ptrlen;
 117
 118                 numusers++;
 119         }
 120
 121         // Okay, permanent channels will (of course) need this \r\n anyway, numusers check is if there
 122         // actually were people in the channel (looped_once == true)
 123         if (!looped_once || numusers > 0)
 124                 buffer.append(list).append("\r\n");
 125
 126         int linesize = 1;
 127         for (BanList::iterator b = c->bans.begin(); b != c->bans.end(); b++)
 128         {
 129                 int size = b->data.length() + 2;
 130                 int currsize = linesize + size;
 131                 if (currsize <= 350)
 132                 {
 133                         modes.append("b");
 134                         params.append(" ").append(b->data);
 135                         linesize += size;
 136                 }
 137                 if ((params.length() >= Instance->Config->Limits.MaxModes) || (currsize > 350))
 138                 {
 139                         /* Wrap at MAXMODES */
 140                         buffer.append(":").append(this->Instance->Config->GetSID()).append(" FMODE ").append(c->name).append(" ").append(ConvToStr(c->age)).append(" +").append(modes).append(params).append("\r\n");
 141                         modes.clear();
 142                         params.clear();
 143                         linesize = 1;
 144                 }
 145         }
 146
 147         /* Only send these if there are any */
 148         if (!modes.empty())
 149                 buffer.append(":").append(this->Instance->Config->GetSID()).append(" FMODE ").append(c->name).append(" ").append(ConvToStr(c->age)).append(" +").append(modes).append(params);
 150
 151         this->WriteLine(buffer);
 152 }
 153
 154 /** Send G, Q, Z and E lines */
 155 void TreeSocket::SendXLines(TreeServer* Current)
 156 {
 157         char data[MAXBUF];
 158         std::string n = this->Instance->Config->GetSID();
 159         const char* sn = n.c_str();
 160
 161         std::vector<std::string> types = Instance->XLines->GetAllTypes();
 162
 163         for (std::vector<std::string>::iterator it = types.begin(); it != types.end(); ++it)
 164         {
 165                 XLineLookup* lookup = Instance->XLines->GetAll(*it);
 166
 167                 if (lookup)
 168                 {
 169                         for (LookupIter i = lookup->begin(); i != lookup->end(); ++i)
 170                         {
 171                                 /* Is it burstable? this is better than an explicit check for type 'K'.
 172                                  * We break the loop as NONE of the items in this group are worth iterating.
 173                                  */
 174                                 if (!i->second->IsBurstable())
 175                                         break;
 176
 177                                 snprintf(data,MAXBUF,":%s ADDLINE %s %s %s %lu %lu :%s",sn, it->c_str(), i->second->Displayable(),
 178                                                 i->second->source,
 179                                                 (unsigned long)i->second->set_time,
 180                                                 (unsigned long)i->second->duration,
 181                                                 i->second->reason);
 182                                 this->WriteLine(data);
 183                         }
 184                 }
 185         }
 186 }
 187
 188 /** Send channel modes and topics */
 189 void TreeSocket::SendChannelModes(TreeServer* Current)
 190 {
 191         char data[MAXBUF];
 192         std::deque<std::string> list;
 193         std::string n = this->Instance->Config->GetSID();
 194         const char* sn = n.c_str();
 195         for (chan_hash::iterator c = this->Instance->chanlist->begin(); c != this->Instance->chanlist->end(); c++)
 196         {
 197                 SendFJoins(Current, 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                 FOREACH_MOD_I(this->Instance,I_OnSyncChannel,OnSyncChannel(c->second,(Module*)Utils->Creator,(void*)this));
 204                 list.clear();
 205                 c->second->GetExtList(list);
 206                 for (unsigned int j = 0; j < list.size(); j++)
 207                 {
 208                         FOREACH_MOD_I(this->Instance,I_OnSyncChannelMetaData,OnSyncChannelMetaData(c->second,(Module*)Utils->Creator,(void*)this,list[j]));
 209                 }
 210         }
 211 }
 212
 213 /** send all users and their oper state/modes */
 214 void TreeSocket::SendUsers(TreeServer* Current)
 215 {
 216         char data[MAXBUF];
 217         std::deque<std::string> list;
 218         std::string dataline;
 219         for (user_hash::iterator u = this->Instance->Users->clientlist->begin(); u != this->Instance->Users->clientlist->end(); u++)
 220         {
 221                 if (u->second->registered == REG_ALL)
 222                 {
 223                         TreeServer* theirserver = Utils->FindServer(u->second->server);
 224                         if (theirserver)
 225                         {
 226                                 snprintf(data,MAXBUF,":%s UID %s %lu %s %s %s %s +%s %s %lu :%s", theirserver->GetID().c_str(), u->second->uuid.c_str(),
 227                                                 (unsigned long)u->second->age, u->second->nick.c_str(), u->second->host.c_str(), u->second->dhost.c_str(),
 228                                                 u->second->ident.c_str(), u->second->FormatModes(), u->second->GetIPString(),
 229                                                 (unsigned long)u->second->signon, u->second->fullname.c_str());
 230                                 this->WriteLine(data);
 231                                 if (IS_OPER(u->second))
 232                                 {
 233                                         snprintf(data,MAXBUF,":%s OPERTYPE %s", u->second->uuid.c_str(), u->second->oper.c_str());
 234                                         this->WriteLine(data);
 235                                 }
 236                                 if (IS_AWAY(u->second))
 237                                 {
 238                                         snprintf(data,MAXBUF,":%s AWAY :%s", u->second->uuid.c_str(), u->second->awaymsg.c_str());
 239                                         this->WriteLine(data);
 240                                 }
 241                         }
 242
 243                         FOREACH_MOD_I(this->Instance,I_OnSyncUser,OnSyncUser(u->second,(Module*)Utils->Creator,(void*)this));
 244                         list.clear();
 245                         u->second->GetExtList(list);
 246                         for (unsigned int j = 0; j < list.size(); j++)
 247                         {
 248                                 FOREACH_MOD_I(this->Instance,I_OnSyncUserMetaData,OnSyncUserMetaData(u->second,(Module*)Utils->Creator,(void*)this,list[j]));
 249                         }
 250                 }
 251         }
 252 }
 253