-/* +------------------------------------+
- * | Inspire Internet Relay Chat Daemon |
- * +------------------------------------+
+/*
+ * InspIRCd -- Internet Relay Chat Daemon
*
- * InspIRCd: (C) 2002-2008 InspIRCd Development Team
- * See: http://www.inspircd.org/wiki/index.php/Credits
+ * Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
+ * Copyright (C) 2007-2008 Robin Burchell <robin+git@viroteck.net>
+ * Copyright (C) 2007 Craig Edwards <craigedwards@brainbox.cc>
+ * Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
*
- * This program is free but copyrighted software; see
- * the file COPYING for details.
+ * This file is part of InspIRCd. InspIRCd is free software: you can
+ * redistribute it and/or modify it under the terms of the GNU General Public
+ * License as published by the Free Software Foundation, version 2.
*
- * ---------------------------------------------------
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
-#include "inspircd.h"
-#include "commands/cmd_whois.h"
-#include "commands/cmd_stats.h"
-#include "socket.h"
-#include "xline.h"
-#include "transport.h"
-#include "m_hash.h"
-#include "socketengine.h"
-
-#include "m_spanningtree/main.h"
-#include "m_spanningtree/utils.h"
-#include "m_spanningtree/treeserver.h"
-#include "m_spanningtree/link.h"
-#include "m_spanningtree/treesocket.h"
-#include "m_spanningtree/resolvers.h"
-#include "m_spanningtree/handshaketimer.h"
-/* $ModDep: m_spanningtree/resolvers.h m_spanningtree/main.h m_spanningtree/utils.h m_spanningtree/treeserver.h m_spanningtree/link.h m_spanningtree/treesocket.h m_hash.h m_spanningtree/handshaketimer.h */
+#include "inspircd.h"
+#include "iohook.h"
+#include "main.h"
+#include "modules/spanningtree.h"
+#include "utils.h"
+#include "treeserver.h"
+#include "link.h"
+#include "treesocket.h"
+#include "commands.h"
/** Because most of the I/O gubbins are encapsulated within
* BufferedSocket, we just call the superclass constructor for
* most of the action, and append a few of our own values
* to it.
*/
-TreeSocket::TreeSocket(SpanningTreeUtilities* Util, InspIRCd* SI, std::string shost, int iport, unsigned long maxtime, const std::string &ServerName, const std::string &bindto, Module* HookMod)
- : BufferedSocket(SI, shost, iport, maxtime, bindto), Utils(Util), Hook(HookMod)
+TreeSocket::TreeSocket(Link* link, Autoconnect* myac, const std::string& ipaddr)
+ : linkID(assign(link->Name)), LinkState(CONNECTING), MyRoot(NULL), proto_version(0), ConnectionFailureShown(false)
+ , age(ServerInstance->Time())
{
- myhost = ServerName;
- theirchallenge.clear();
- ourchallenge.clear();
- this->LinkState = CONNECTING;
- if (Hook)
- BufferedSocketHookRequest(this, (Module*)Utils->Creator, Hook).Send();
+ capab = new CapabData;
+ capab->link = link;
+ capab->ac = myac;
+ capab->capab_phase = 0;
+
+ DoConnect(ipaddr, link->Port, link->Timeout, link->Bind);
+ Utils->timeoutlist[this] = std::pair<std::string, int>(linkID, link->Timeout);
+ SendCapabilities(1);
}
/** When a listening socket gives us a new file descriptor,
* we must associate it with a socket without creating a new
* connection. This constructor is used for this purpose.
*/
-TreeSocket::TreeSocket(SpanningTreeUtilities* Util, InspIRCd* SI, int newfd, char* ip, Module* HookMod)
- : BufferedSocket(SI, newfd, ip), Utils(Util), Hook(HookMod)
+TreeSocket::TreeSocket(int newfd, ListenSocket* via, irc::sockets::sockaddrs* client, irc::sockets::sockaddrs* server)
+ : BufferedSocket(newfd)
+ , linkID("inbound from " + client->addr()), LinkState(WAIT_AUTH_1), MyRoot(NULL), proto_version(0)
+ , ConnectionFailureShown(false), age(ServerInstance->Time())
{
- this->LinkState = WAIT_AUTH_1;
- theirchallenge.clear();
- ourchallenge.clear();
- sentcapab = false;
- /* If we have a transport module hooked to the parent, hook the same module to this
- * socket, and set a timer waiting for handshake before we send CAPAB etc.
- */
- if (Hook)
- BufferedSocketHookRequest(this, (Module*)Utils->Creator, Hook).Send();
+ capab = new CapabData;
+ capab->capab_phase = 0;
- Instance->Timers->AddTimer(new HandshakeTimer(Instance, this, &(Utils->LinkBlocks[0]), this->Utils, 1));
+ if (via->iohookprov)
+ via->iohookprov->OnAccept(this, client, server);
+ SendCapabilities(1);
+
+ Utils->timeoutlist[this] = std::pair<std::string, int>(linkID, 30);
}
ServerState TreeSocket::GetLinkState()
return this->LinkState;
}
-Module* TreeSocket::GetHook()
+void TreeSocket::CleanNegotiationInfo()
{
- return this->Hook;
+ // connect is good, reset the autoconnect block (if used)
+ if (capab->ac)
+ capab->ac->position = -1;
+ delete capab;
+ capab = NULL;
+}
+
+CullResult TreeSocket::cull()
+{
+ Utils->timeoutlist.erase(this);
+ if (capab && capab->ac)
+ Utils->Creator->ConnectServer(capab->ac, false);
+ return this->BufferedSocket::cull();
}
TreeSocket::~TreeSocket()
{
- if (Hook)
- BufferedSocketUnhookRequest(this, (Module*)Utils->Creator, Hook).Send();
+ delete capab;
}
/** When an outbound connection finishes connecting, we receive
* to server docs on the inspircd.org site, the other side
* will then send back its own server string.
*/
-bool TreeSocket::OnConnected()
+void TreeSocket::OnConnected()
{
if (this->LinkState == CONNECTING)
{
- /* we do not need to change state here. */
- for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
+ if (!capab->link->Hook.empty())
{
- if (x->Name == this->myhost)
+ ServiceProvider* prov = ServerInstance->Modules->FindService(SERVICE_IOHOOK, capab->link->Hook);
+ if (!prov)
{
- Utils->Creator->RemoteMessage(NULL,"Connection to \2%s\2[%s] started.", myhost.c_str(), (x->HiddenFromStats ? "<hidden>" : this->GetIP().c_str()));
- if (Hook)
- {
- BufferedSocketHookRequest(this, (Module*)Utils->Creator, Hook).Send();
- Utils->Creator->RemoteMessage(NULL,"Connection to \2%s\2[%s] using transport \2%s\2", myhost.c_str(), (x->HiddenFromStats ? "<hidden>" : this->GetIP().c_str()),
- x->Hook.c_str());
- }
- this->OutboundPass = x->SendPass;
- sentcapab = false;
-
- /* found who we're supposed to be connecting to, send the neccessary gubbins. */
- if (this->GetHook())
- Instance->Timers->AddTimer(new HandshakeTimer(Instance, this, &(*x), this->Utils, 1));
- else
- this->SendCapabilities();
-
- return true;
+ SetError("Could not find hook '" + capab->link->Hook + "' for connection to " + linkID);
+ return;
}
+ static_cast<IOHookProvider*>(prov)->OnConnect(this);
}
- }
- /* There is a (remote) chance that between the /CONNECT and the connection
- * being accepted, some muppet has removed the <link> block and rehashed.
- * If that happens the connection hangs here until it's closed. Unlikely
- * and rather harmless.
- */
- this->Utils->Creator->RemoteMessage(NULL,"Connection to \2%s\2 lost link tag(!)", myhost.c_str());
- return true;
-}
-
-void TreeSocket::OnError(BufferedSocketError e)
-{
- Link* MyLink;
- switch (e)
- {
- case I_ERR_CONNECT:
- Utils->Creator->RemoteMessage(NULL,"Connection failed: Connection to \002%s\002 refused", myhost.c_str());
- MyLink = Utils->FindLink(myhost);
- if (MyLink)
- Utils->DoFailOver(MyLink);
- break;
- case I_ERR_SOCKET:
- Utils->Creator->RemoteMessage(NULL,"Connection failed: Could not create socket (%s)", strerror(errno));
- break;
- case I_ERR_BIND:
- Utils->Creator->RemoteMessage(NULL,"Connection failed: Error binding socket to address or port (%s)", strerror(errno));
- break;
- case I_ERR_WRITE:
- Utils->Creator->RemoteMessage(NULL,"Connection failed: I/O error on connection (%s)", strerror(errno));
- break;
- case I_ERR_NOMOREFDS:
- Utils->Creator->RemoteMessage(NULL,"Connection failed: Operating system is out of file descriptors!");
- break;
- default:
- if ((errno) && (errno != EINPROGRESS) && (errno != EAGAIN))
- Utils->Creator->RemoteMessage(NULL,"Connection to \002%s\002 failed with OS error: %s", myhost.c_str(), strerror(errno));
- break;
+ ServerInstance->SNO->WriteGlobalSno('l', "Connection to \2%s\2[%s] started.", linkID.c_str(),
+ (capab->link->HiddenFromStats ? "<hidden>" : capab->link->IPAddr.c_str()));
+ this->SendCapabilities(1);
}
}
-int TreeSocket::OnDisconnect()
+void TreeSocket::OnError(BufferedSocketError e)
{
- /* For the same reason as above, we don't
- * handle OnDisconnect()
- */
- return true;
+ ServerInstance->SNO->WriteGlobalSno('l', "Connection to '\002%s\002' failed with error: %s",
+ linkID.c_str(), getError().c_str());
+ LinkState = DYING;
}
void TreeSocket::SendError(const std::string &errormessage)
{
- /* Display the error locally as well as sending it remotely */
- Utils->Creator->RemoteMessage(NULL, "Sent \2ERROR\2 to %s: %s", (this->InboundServerName.empty() ? this->GetIP().c_str() : this->InboundServerName.c_str()), errormessage.c_str());
- this->WriteLine("ERROR :"+errormessage);
- /* One last attempt to make sure the error reaches its target */
- this->FlushWriteBuffer();
+ WriteLine("ERROR :"+errormessage);
+ DoWrite();
+ LinkState = DYING;
+ SetError(errormessage);
}
/** This function forces this server to quit, removing this server
* 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)
+void TreeSocket::SquitServer(std::string &from, TreeServer* Current, int& num_lost_servers, int& num_lost_users)
{
+ ServerInstance->Logs->Log(MODNAME, LOG_DEBUG, "SquitServer for %s from %s", Current->GetName().c_str(), from.c_str());
/* 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++)
+ const TreeServer::ChildServers& children = Current->GetChildren();
+ for (TreeServer::ChildServers::const_iterator i = children.begin(); i != children.end(); ++i)
{
- TreeServer* recursive_server = Current->GetChild(q);
- this->SquitServer(from,recursive_server);
+ TreeServer* recursive_server = *i;
+ this->SquitServer(from,recursive_server, num_lost_servers, num_lost_users);
}
/* Now we've whacked the kids, whack self */
num_lost_servers++;
*/
void TreeSocket::Squit(TreeServer* Current, const std::string &reason)
{
- if ((Current) && (Current != Utils->TreeRoot))
+ bool LocalSquit = false;
+
+ if (!Current->IsRoot())
{
- Event rmode((char*)Current->GetName().c_str(), (Module*)Utils->Creator, "lost_server");
- rmode.Send(Instance);
+ DelServerEvent(Utils->Creator, Current->GetName());
- 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)
+ if (Current->IsLocal())
{
- this->Instance->SNO->WriteToSnoMask('l',"Server \002"+Current->GetName()+"\002 split: "+reason);
+ ServerInstance->SNO->WriteGlobalSno('l', "Server \002"+Current->GetName()+"\002 split: "+reason);
+ LocalSquit = true;
+ if (Current->GetSocket()->Introduced())
+ {
+ CmdBuilder params("SQUIT");
+ params.push_back(Current->GetID());
+ params.push_last(reason);
+ params.Broadcast();
+ }
}
else
{
- this->Instance->SNO->WriteToSnoMask('l',"Server \002"+Current->GetName()+"\002 split from server \002"+Current->GetParent()->GetName()+"\002 with reason: "+reason);
+ ServerInstance->SNO->WriteGlobalSno('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;
+ int num_lost_servers = 0;
+ int num_lost_users = 0;
std::string from = Current->GetParent()->GetName()+" "+Current->GetName();
- SquitServer(from, Current);
+
+ ModuleSpanningTree* st = Utils->Creator;
+ st->SplitInProgress = true;
+ SquitServer(from, Current, num_lost_servers, num_lost_users);
+ st->SplitInProgress = false;
+
+ ServerInstance->SNO->WriteToSnoMask(LocalSquit ? 'l' : 'L', "Netsplit complete, lost \002%d\002 user%s on \002%d\002 server%s.",
+ num_lost_users, num_lost_users != 1 ? "s" : "", num_lost_servers, num_lost_servers != 1 ? "s" : "");
Current->Tidy();
Current->GetParent()->DelChild(Current);
+ Current->cull();
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);
+ if (Current == MyRoot)
+ {
+ MyRoot = NULL;
+ Close();
+ }
}
- else
- Instance->Logs->Log("m_spanningtree",DEFAULT,"Squit from unknown server");
+}
+
+CmdResult CommandSQuit::HandleServer(TreeServer* server, std::vector<std::string>& params)
+{
+ TreeServer* quitting = Utils->FindServer(params[0]);
+ if (!quitting)
+ {
+ ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "Squit from unknown server");
+ return CMD_FAILURE;
+ }
+
+ TreeSocket* sock = server->GetSocket();
+ sock->Squit(quitting, params[1]);
+
+ // XXX: Return CMD_FAILURE when servers SQUIT themselves (i.e. :00S SQUIT 00S :Shutting down)
+ // to avoid RouteCommand() being called. RouteCommand() requires a valid command source but we
+ // do not have one because the server user is deleted when its TreeServer is destructed.
+ // We generate a SQUIT in TreeSocket::Squit(), with our sid as the source and send it to the
+ // remaining servers.
+ return ((quitting == server) ? CMD_FAILURE : CMD_SUCCESS);
}
/** This function is called when we receive data from a remote
- * server. We buffer the data in a std::string (it doesnt stay
- * there for long), reading using BufferedSocket::Read() which can
- * read up to 16 kilobytes in one operation.
- *
- * IF THIS FUNCTION RETURNS FALSE, THE CORE CLOSES AND DELETES
- * THE SOCKET OBJECT FOR US.
+ * server.
*/
-bool TreeSocket::OnDataReady()
+void TreeSocket::OnDataReady()
{
- const char* data = this->Read();
- /* Check that the data read is a valid pointer and it has some content */
- if (data && *data)
+ Utils->Creator->loopCall = true;
+ std::string line;
+ while (GetNextLine(line))
{
- this->in_buffer.append(data);
- /* While there is at least one new line in the buffer,
- * do something useful (we hope!) with it.
- */
- while (in_buffer.find("\n") != std::string::npos)
+ std::string::size_type rline = line.find('\r');
+ if (rline != std::string::npos)
+ line = line.substr(0,rline);
+ if (line.find('\0') != std::string::npos)
{
- std::string ret = in_buffer.substr(0,in_buffer.find("\n")-1);
- in_buffer = in_buffer.substr(in_buffer.find("\n")+1,in_buffer.length()-in_buffer.find("\n"));
- /* Use rfind here not find, as theres more
- * chance of the \r being near the end of the
- * string, not the start.
- */
- if (ret.find("\r") != std::string::npos)
- ret = in_buffer.substr(0,in_buffer.find("\r")-1);
- /* Process this one, abort if it
- * didnt return true.
- */
- if (!this->ProcessLine(ret))
- {
- return false;
- }
+ SendError("Read null character from socket");
+ break;
}
- return true;
+ ProcessLine(line);
+ if (!getError().empty())
+ break;
}
- /* EAGAIN returns an empty but non-NULL string, so this
- * evaluates to TRUE for EAGAIN but to FALSE for EOF.
- */
- return (data && !*data);
+ if (LinkState != CONNECTED && recvq.length() > 4096)
+ SendError("RecvQ overrun (line too long)");
+ Utils->Creator->loopCall = false;
+}
+
+bool TreeSocket::Introduced()
+{
+ return (capab == NULL);
}
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