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