- /* Display the error locally as well as sending it remotely */
- this->WriteLine("ERROR :"+errormessage);
- this->Instance->SNO->WriteToSnoMask('l',"Sent \2ERROR\2 to "+this->InboundServerName+": "+errormessage);
- /* One last attempt to make sure the error reaches its target */
- this->FlushWriteBuffer();
-}
-
-bool TreeSocket::Capab(const std::deque<std::string> ¶ms)
-{
- if (params.size() < 1)
- {
- this->SendError("Invalid number of parameters for CAPAB - Mismatched version");
- return false;
- }
- if (params[0] == "START")
- {
- this->ModuleList.clear();
- this->CapKeys.clear();
- }
- else if (params[0] == "END")
- {
- std::string reason;
- int ip6support = 0;
-#ifdef SUPPORT_IP6LINKS
- ip6support = 1;
-#endif
- /* Compare ModuleList and check CapKeys...
- * Maybe this could be tidier? -- Brain
- */
- if ((this->ModuleList != this->MyCapabilities()) && (this->ModuleList.length()))
- {
- std::string diff = ListDifference(this->ModuleList, this->MyCapabilities());
- if (!diff.length())
- {
- diff = "your server:" + ListDifference(this->MyCapabilities(), this->ModuleList);
- }
- else
- {
- diff = "this server:" + diff;
- }
- if (diff.length() == 12)
- reason = "Module list in CAPAB is not alphabetically ordered, cannot compare lists.";
- else
- reason = "Modules loaded on these servers are not correctly matched, these modules are not loaded on " + diff;
- }
-
- cap_validation valid_capab[] = {
- {"Maximum nickname lengths differ or remote nickname length not specified", "NICKMAX", NICKMAX},
- {"Maximum ident lengths differ or remote ident length not specified", "IDENTMAX", IDENTMAX},
- {"Maximum channel lengths differ or remote channel length not specified", "CHANMAX", CHANMAX},
- {"Maximum modes per line differ or remote modes per line not specified", "MAXMODES", MAXMODES},
- {"Maximum quit lengths differ or remote quit length not specified", "MAXQUIT", MAXQUIT},
- {"Maximum topic lengths differ or remote topic length not specified", "MAXTOPIC", MAXTOPIC},
- {"Maximum kick lengths differ or remote kick length not specified", "MAXKICK", MAXKICK},
- {"Maximum GECOS (fullname) lengths differ or remote GECOS length not specified", "MAXGECOS", MAXGECOS},
- {"Maximum awaymessage lengths differ or remote awaymessage length not specified", "MAXAWAY", MAXAWAY},
- {"", "", 0}
- };
-
- if (((this->CapKeys.find("IP6SUPPORT") == this->CapKeys.end()) && (ip6support)) || ((this->CapKeys.find("IP6SUPPORT") != this->CapKeys.end()) && (this->CapKeys.find("IP6SUPPORT")->second != ConvToStr(ip6support))))
- reason = "We don't both support linking to IPV6 servers";
- if (((this->CapKeys.find("IP6NATIVE") != this->CapKeys.end()) && (this->CapKeys.find("IP6NATIVE")->second == "1")) && (!ip6support))
- reason = "The remote server is IPV6 native, and we don't support linking to IPV6 servers";
- if (((this->CapKeys.find("PROTOCOL") == this->CapKeys.end()) || ((this->CapKeys.find("PROTOCOL") != this->CapKeys.end()) && (this->CapKeys.find("PROTOCOL")->second != ConvToStr(ProtocolVersion)))))
- {
- if (this->CapKeys.find("PROTOCOL") != this->CapKeys.end())
- reason = "Mismatched protocol versions "+this->CapKeys.find("PROTOCOL")->second+" and "+ConvToStr(ProtocolVersion);
- else
- reason = "Protocol version not specified";
- }
-
- if(this->CapKeys.find("PREFIX") != this->CapKeys.end() && this->CapKeys.find("PREFIX")->second != this->Instance->Modes->BuildPrefixes())
- reason = "One or more of the prefixes on the remote server are invalid on this server.";
-
- if (((this->CapKeys.find("HALFOP") == this->CapKeys.end()) && (Instance->Config->AllowHalfop)) || ((this->CapKeys.find("HALFOP") != this->CapKeys.end()) && (this->CapKeys.find("HALFOP")->second != ConvToStr(Instance->Config->AllowHalfop))))
- reason = "We don't both have halfop support enabled/disabled identically";
-
- for (int x = 0; valid_capab[x].size; ++x)
- {
- if (((this->CapKeys.find(valid_capab[x].key) == this->CapKeys.end()) || ((this->CapKeys.find(valid_capab[x].key) != this->CapKeys.end()) &&
- (this->CapKeys.find(valid_capab[x].key)->second != ConvToStr(valid_capab[x].size)))))
- reason = valid_capab[x].reason;
- }
-
- /* Challenge response, store their challenge for our password */
- std::map<std::string,std::string>::iterator n = this->CapKeys.find("CHALLENGE");
- if (Utils->ChallengeResponse && (n != this->CapKeys.end()) && (Instance->FindModule("m_sha256.so")))
- {
- /* Challenge-response is on now */
- this->SetTheirChallenge(n->second);
- if (!this->GetTheirChallenge().empty() && (this->LinkState == CONNECTING))
- {
- this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+this->MakePass(OutboundPass, this->GetTheirChallenge())+" 0 :"+this->Instance->Config->ServerDesc);
- }
- }
- else
- {
- /* They didnt specify a challenge or we don't have m_sha256.so, we use plaintext */
- if (this->LinkState == CONNECTING)
- this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+OutboundPass+" 0 :"+this->Instance->Config->ServerDesc);
- }
-
- if (reason.length())
- {
- this->SendError("CAPAB negotiation failed: "+reason);
- return false;
- }
- }
- else if ((params[0] == "MODULES") && (params.size() == 2))
- {
- if (!this->ModuleList.length())
- {
- this->ModuleList.append(params[1]);
- }
- else
- {
- this->ModuleList.append(",");
- this->ModuleList.append(params[1]);
- }
- }
-
- else if ((params[0] == "CAPABILITIES") && (params.size() == 2))
- {
- irc::tokenstream capabs(params[1]);
- std::string item;
- bool more = true;
- while ((more = capabs.GetToken(item)))
- {
- /* Process each key/value pair */
- std::string::size_type equals = item.rfind('=');
- if (equals != std::string::npos)
- {
- std::string var = item.substr(0, equals);
- std::string value = item.substr(equals+1, item.length());
- CapKeys[var] = value;
- }
- }
- }
- return true;
-}
-
-/** This function forces this server to quit, removing this server
- * and any users on it (and servers and users below that, etc etc).
- * It's very slow and pretty clunky, but luckily unless your network
- * is having a REAL bad hair day, this function shouldnt be called
- * too many times a month ;-)
- */
-void TreeSocket::SquitServer(std::string &from, TreeServer* Current)
-{
- /* recursively squit the servers attached to 'Current'.
- * We're going backwards so we don't remove users
- * while we still need them ;)
- */
- for (unsigned int q = 0; q < Current->ChildCount(); q++)
- {
- TreeServer* recursive_server = Current->GetChild(q);
- this->SquitServer(from,recursive_server);
- }
- /* Now we've whacked the kids, whack self */
- num_lost_servers++;
- num_lost_users += Current->QuitUsers(from);
-}
-
-/** This is a wrapper function for SquitServer above, which
- * does some validation first and passes on the SQUIT to all
- * other remaining servers.
- */
-void TreeSocket::Squit(TreeServer* Current, const std::string &reason)
-{
- if ((Current) && (Current != Utils->TreeRoot))
- {
- Event rmode((char*)Current->GetName().c_str(), (Module*)Utils->Creator, "lost_server");
- rmode.Send(Instance);
-
- std::deque<std::string> params;
- params.push_back(Current->GetName());
- params.push_back(":"+reason);
- Utils->DoOneToAllButSender(Current->GetParent()->GetName(),"SQUIT",params,Current->GetName());
- if (Current->GetParent() == Utils->TreeRoot)
- {
- this->Instance->SNO->WriteToSnoMask('l',"Server \002"+Current->GetName()+"\002 split: "+reason);
- }
- else
- {
- this->Instance->SNO->WriteToSnoMask('l',"Server \002"+Current->GetName()+"\002 split from server \002"+Current->GetParent()->GetName()+"\002 with reason: "+reason);
- }
- num_lost_servers = 0;
- num_lost_users = 0;
- std::string from = Current->GetParent()->GetName()+" "+Current->GetName();
- SquitServer(from, Current);
- Current->Tidy();
- Current->GetParent()->DelChild(Current);
- DELETE(Current);
- this->Instance->SNO->WriteToSnoMask('l',"Netsplit complete, lost \002%d\002 users on \002%d\002 servers.", num_lost_users, num_lost_servers);
- }
- else
- Instance->Log(DEFAULT,"Squit from unknown server");
-}
-
-/** FMODE command - server mode with timestamp checks */
-bool TreeSocket::ForceMode(const std::string &source, std::deque<std::string> ¶ms)
-{
- /* Chances are this is a 1.0 FMODE without TS */
- if (params.size() < 3)
- {
- /* No modes were in the command, probably a channel with no modes set on it */
- return true;
- }
-
- bool smode = false;
- std::string sourceserv;
- /* Are we dealing with an FMODE from a user, or from a server? */
- userrec* who = this->Instance->FindNick(source);
- if (who)
- {
- /* FMODE from a user, set sourceserv to the users server name */
- sourceserv = who->server;
- }
- else
- {
- /* FMODE from a server, create a fake user to receive mode feedback */
- who = new userrec(this->Instance);
- who->SetFd(FD_MAGIC_NUMBER);
- smode = true; /* Setting this flag tells us we should free the userrec later */
- sourceserv = source; /* Set sourceserv to the actual source string */
- }
- const char* modelist[64];
- time_t TS = 0;
- int n = 0;
- memset(&modelist,0,sizeof(modelist));
- for (unsigned int q = 0; (q < params.size()) && (q < 64); q++)
- {
- if (q == 1)
- {
- /* The timestamp is in this position.
- * We don't want to pass that up to the
- * server->client protocol!
- */
- TS = atoi(params[q].c_str());
- }
- else
- {
- /* Everything else is fine to append to the modelist */
- modelist[n++] = params[q].c_str();
- }
-
- }
- /* Extract the TS value of the object, either userrec or chanrec */
- userrec* dst = this->Instance->FindNick(params[0]);
- chanrec* chan = NULL;
- time_t ourTS = 0;
- if (dst)
- {
- ourTS = dst->age;
- }
- else
- {
- chan = this->Instance->FindChan(params[0]);
- if (chan)
- {
- ourTS = chan->age;
- }
- else
- /* Oops, channel doesnt exist! */
- return true;
- }
-
- if (!TS)
- {
- Instance->Log(DEFAULT,"*** BUG? *** TS of 0 sent to FMODE. Are some services authors smoking craq, or is it 1970 again?. Dropped.");
- Instance->SNO->WriteToSnoMask('d', "WARNING: The server %s is sending FMODE with a TS of zero. Total craq. Mode was dropped.", sourceserv.c_str());
- return true;
- }
-
- /* TS is equal or less: Merge the mode changes into ours and pass on.
- */
- if (TS <= ourTS)
- {
- if ((TS < ourTS) && (!dst))
- Instance->Log(DEFAULT,"*** BUG *** Channel TS sent in FMODE to %s is %lu which is not equal to %lu!", params[0].c_str(), TS, ourTS);
-
- if (smode)
- {
- this->Instance->SendMode(modelist, n, who);
- }
- else
- {
- this->Instance->CallCommandHandler("MODE", modelist, n, who);
- }
- /* HOT POTATO! PASS IT ON! */
- Utils->DoOneToAllButSender(source,"FMODE",params,sourceserv);
- }
- /* If the TS is greater than ours, we drop the mode and dont pass it anywhere.
- */
-
- if (smode)
- DELETE(who);
-
- return true;
-}
-
-/** FTOPIC command */
-bool TreeSocket::ForceTopic(const std::string &source, std::deque<std::string> ¶ms)
-{
- if (params.size() != 4)
- return true;
- time_t ts = atoi(params[1].c_str());
- std::string nsource = source;
- chanrec* c = this->Instance->FindChan(params[0]);
- if (c)
- {
- if ((ts >= c->topicset) || (!*c->topic))
- {
- std::string oldtopic = c->topic;
- strlcpy(c->topic,params[3].c_str(),MAXTOPIC);
- strlcpy(c->setby,params[2].c_str(),127);
- c->topicset = ts;
- /* if the topic text is the same as the current topic,
- * dont bother to send the TOPIC command out, just silently
- * update the set time and set nick.
- */
- if (oldtopic != params[3])
- {
- userrec* user = this->Instance->FindNick(source);
- if (!user)
- {
- c->WriteChannelWithServ(Instance->Config->ServerName, "TOPIC %s :%s", c->name, c->topic);
- }
- else
- {
- c->WriteChannel(user, "TOPIC %s :%s", c->name, c->topic);
- nsource = user->server;
- }
- /* all done, send it on its way */
- params[3] = ":" + params[3];
- Utils->DoOneToAllButSender(source,"FTOPIC",params,nsource);
- }
- }
-
- }
- return true;