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://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->ServerInstance->Config->GetSID() + " BURST " +ConvToStr(ServerInstance->Time());
  33         std::string endburst = ":" + this->ServerInstance->Config->GetSID() + " ENDBURST";
  34         this->ServerInstance->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->ServerInstance->Config->GetSID()+" VERSION :"+this->ServerInstance->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->ServerInstance,I_OnSyncOtherMetaData,OnSyncOtherMetaData((Module*)Utils->Creator,(void*)this));
  46         this->WriteLine(endburst);
  47         this->ServerInstance->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 curlen, headlen;
  88         curlen = headlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu +%s :",
  89                 this->ServerInstance->Config->GetSID().c_str(), c->name.c_str(), (unsigned long)c->age, c->ChanModes(true));
  90         int numusers = 0;
  91         char* ptr = list + curlen;
  92         bool looped_once = false;
  93
  94         CUList *ulist = c->GetUsers();
  95         std::string modes;
  96         std::string params;
  97
  98         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
  99         {
 100                 size_t ptrlen = 0;
 101                 std::string modestr = this->ServerInstance->Modes->ModeString(i->first, c, false);
 102
 103                 if ((curlen + modestr.length() + i->first->uuid.length() + 4) > 480)
 104                 {
 105                         // remove the final space
 106                         if (ptr[-1] == ' ')
 107                                 ptr[-1] = '\0';
 108                         buffer.append(list).append("\r\n");
 109                         curlen = headlen;
 110                         ptr = list + headlen;
 111                         numusers = 0;
 112                 }
 113
 114                 ptrlen = snprintf(ptr, MAXBUF-curlen, "%s,%s ", modestr.c_str(), i->first->uuid.c_str());
 115
 116                 looped_once = true;
 117
 118                 curlen += ptrlen;
 119                 ptr += ptrlen;
 120
 121                 numusers++;
 122         }
 123
 124         // Okay, permanent channels will (of course) need this \r\n anyway, numusers check is if there
 125         // actually were people in the channel (looped_once == true)
 126         if (!looped_once || numusers > 0)
 127         {
 128                 // remove the final space
 129                 if (ptr[-1] == ' ')
 130                         ptr[-1] = '\0';
 131                 buffer.append(list).append("\r\n");
 132         }
 133
 134         int linesize = 1;
 135         for (BanList::iterator b = c->bans.begin(); b != c->bans.end(); b++)
 136         {
 137                 int size = b->data.length() + 2;
 138                 int currsize = linesize + size;
 139                 if (currsize <= 350)
 140                 {
 141                         modes.append("b");
 142                         params.append(" ").append(b->data);
 143                         linesize += size;
 144                 }
 145                 if ((params.length() >= ServerInstance->Config->Limits.MaxModes) || (currsize > 350))
 146                 {
 147                         /* Wrap at MAXMODES */
 148                         buffer.append(":").append(this->ServerInstance->Config->GetSID()).append(" FMODE ").append(c->name).append(" ").append(ConvToStr(c->age)).append(" +").append(modes).append(params).append("\r\n");
 149                         modes.clear();
 150                         params.clear();
 151                         linesize = 1;
 152                 }
 153         }
 154
 155         /* Only send these if there are any */
 156         if (!modes.empty())
 157                 buffer.append(":").append(this->ServerInstance->Config->GetSID()).append(" FMODE ").append(c->name).append(" ").append(ConvToStr(c->age)).append(" +").append(modes).append(params);
 158
 159         this->WriteLine(buffer);
 160 }
 161
 162 /** Send G, Q, Z and E lines */
 163 void TreeSocket::SendXLines(TreeServer* Current)
 164 {
 165         char data[MAXBUF];
 166         std::string n = this->ServerInstance->Config->GetSID();
 167         const char* sn = n.c_str();
 168
 169         std::vector<std::string> types = ServerInstance->XLines->GetAllTypes();
 170         time_t current = ServerInstance->Time();
 171
 172         for (std::vector<std::string>::iterator it = types.begin(); it != types.end(); ++it)
 173         {
 174                 XLineLookup* lookup = ServerInstance->XLines->GetAll(*it);
 175
 176                 if (lookup)
 177                 {
 178                         for (LookupIter i = lookup->begin(); i != lookup->end(); ++i)
 179                         {
 180                                 /* Is it burstable? this is better than an explicit check for type 'K'.
 181                                  * We break the loop as NONE of the items in this group are worth iterating.
 182                                  */
 183                                 if (!i->second->IsBurstable())
 184                                         break;
 185
 186                                 /* If it's expired, don't bother to burst it
 187                                  */
 188                                 if (i->second->duration && current > i->second->expiry)
 189                                         continue;
 190
 191                                 snprintf(data,MAXBUF,":%s ADDLINE %s %s %s %lu %lu :%s",sn, it->c_str(), i->second->Displayable(),
 192                                                 i->second->source,
 193                                                 (unsigned long)i->second->set_time,
 194                                                 (unsigned long)i->second->duration,
 195                                                 i->second->reason);
 196                                 this->WriteLine(data);
 197                         }
 198                 }
 199         }
 200 }
 201
 202 /** Send channel modes and topics */
 203 void TreeSocket::SendChannelModes(TreeServer* Current)
 204 {
 205         char data[MAXBUF];
 206         std::deque<std::string> list;
 207         std::string n = this->ServerInstance->Config->GetSID();
 208         const char* sn = n.c_str();
 209         for (chan_hash::iterator c = this->ServerInstance->chanlist->begin(); c != this->ServerInstance->chanlist->end(); c++)
 210         {
 211                 SendFJoins(Current, c->second);
 212                 if (!c->second->topic.empty())
 213                 {
 214                         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());
 215                         this->WriteLine(data);
 216                 }
 217                 FOREACH_MOD_I(this->ServerInstance,I_OnSyncChannel,OnSyncChannel(c->second,(Module*)Utils->Creator,(void*)this));
 218                 list.clear();
 219                 c->second->GetExtList(list);
 220                 for (unsigned int j = 0; j < list.size(); j++)
 221                 {
 222                         FOREACH_MOD_I(this->ServerInstance,I_OnSyncChannelMetaData,OnSyncChannelMetaData(c->second,(Module*)Utils->Creator,(void*)this,list[j]));
 223                 }
 224         }
 225 }
 226
 227 /** send all users and their oper state/modes */
 228 void TreeSocket::SendUsers(TreeServer* Current)
 229 {
 230         char data[MAXBUF];
 231         std::deque<std::string> list;
 232         std::string dataline;
 233         for (user_hash::iterator u = this->ServerInstance->Users->clientlist->begin(); u != this->ServerInstance->Users->clientlist->end(); u++)
 234         {
 235                 if (u->second->registered == REG_ALL)
 236                 {
 237                         TreeServer* theirserver = Utils->FindServer(u->second->server);
 238                         if (theirserver)
 239                         {
 240                                 snprintf(data,MAXBUF,":%s UID %s %lu %s %s %s %s %s %lu +%s :%s",
 241                                                 theirserver->GetID().c_str(),   /* Prefix: SID */
 242                                                 u->second->uuid.c_str(),        /* 0: UUID */
 243                                                 (unsigned long)u->second->age,  /* 1: TS */
 244                                                 u->second->nick.c_str(),        /* 2: Nick */
 245                                                 u->second->host.c_str(),        /* 3: Displayed Host */
 246                                                 u->second->dhost.c_str(),       /* 4: Real host */
 247                                                 u->second->ident.c_str(),       /* 5: Ident */
 248                                                 u->second->GetIPString(),       /* 6: IP string */
 249                                                 (unsigned long)u->second->signon, /* 7: Signon time for WHOWAS */
 250                                                 u->second->FormatModes(true),   /* 8...n: Modes and params */
 251                                                 u->second->fullname.c_str());   /* size-1: GECOS */
 252                                 this->WriteLine(data);
 253                                 if (IS_OPER(u->second))
 254                                 {
 255                                         snprintf(data,MAXBUF,":%s OPERTYPE %s", u->second->uuid.c_str(), u->second->oper.c_str());
 256                                         this->WriteLine(data);
 257                                 }
 258                                 if (IS_AWAY(u->second))
 259                                 {
 260                                         snprintf(data,MAXBUF,":%s AWAY :%s", u->second->uuid.c_str(), u->second->awaymsg.c_str());
 261                                         this->WriteLine(data);
 262                                 }
 263                         }
 264
 265                         FOREACH_MOD_I(this->ServerInstance,I_OnSyncUser,OnSyncUser(u->second,(Module*)Utils->Creator,(void*)this));
 266                         list.clear();
 267                         u->second->GetExtList(list);
 268                         for (unsigned int j = 0; j < list.size(); j++)
 269                         {
 270                                 FOREACH_MOD_I(this->ServerInstance,I_OnSyncUserMetaData,OnSyncUserMetaData(u->second,(Module*)Utils->Creator,(void*)this,list[j]));
 271                         }
 272                 }
 273         }
 274 }
 275