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Diffstat (limited to 'src/modules/m_spanningtree/main.cpp')
| -rw-r--r-- | src/modules/m_spanningtree/main.cpp | 5487 |
1 files changed, 5487 insertions, 0 deletions
diff --git a/src/modules/m_spanningtree/main.cpp b/src/modules/m_spanningtree/main.cpp new file mode 100644 index 000000000..93115f060 --- /dev/null +++ b/src/modules/m_spanningtree/main.cpp @@ -0,0 +1,5487 @@ +/* +------------------------------------+ + * | Inspire Internet Relay Chat Daemon | + * +------------------------------------+ + * + * InspIRCd: (C) 2002-2007 InspIRCd Development Team + * See: http://www.inspircd.org/wiki/index.php/Credits + * + * This program is free but copyrighted software; see + * the file COPYING for details. + * + * --------------------------------------------------- + */ + +/* $ModDesc: Provides a spanning tree server link protocol */ + +#include "configreader.h" +#include "users.h" +#include "channels.h" +#include "modules.h" +#include "commands/cmd_whois.h" +#include "commands/cmd_stats.h" +#include "socket.h" +#include "inspircd.h" +#include "wildcard.h" +#include "xline.h" +#include "transport.h" + +/** If you make a change which breaks the protocol, increment this. + * If you completely change the protocol, completely change the number. + * + * IMPORTANT: If you make changes, document your changes here, without fail: + * http://www.inspircd.org/wiki/List_of_protocol_changes_between_versions + * + * Failure to document your protocol changes will result in a painfully + * painful death by pain. You have been warned. + */ +const long ProtocolVersion = 1103; + +/* + * The server list in InspIRCd is maintained as two structures + * which hold the data in different ways. Most of the time, we + * want to very quicky obtain three pieces of information: + * + * (1) The information on a server + * (2) The information on the server we must send data through + * to actually REACH the server we're after + * (3) Potentially, the child/parent objects of this server + * + * The InspIRCd spanning protocol provides easy access to these + * by storing the data firstly in a recursive structure, where + * each item references its parent item, and a dynamic list + * of child items, and another structure which stores the items + * hashed, linearly. This means that if we want to find a server + * by name quickly, we can look it up in the hash, avoiding + * any O(n) lookups. If however, during a split or sync, we want + * to apply an operation to a server, and any of its child objects + * we can resort to recursion to walk the tree structure. + * Any socket can have one of five states at any one time. + * The LISTENER state indicates a socket which is listening + * for connections. It cannot receive data itself, only incoming + * sockets. + * The CONNECTING state indicates an outbound socket which is + * waiting to be writeable. + * The WAIT_AUTH_1 state indicates the socket is outbound and + * has successfully connected, but has not yet sent and received + * SERVER strings. + * The WAIT_AUTH_2 state indicates that the socket is inbound + * (allocated by a LISTENER) but has not yet sent and received + * SERVER strings. + * The CONNECTED state represents a fully authorized, fully + * connected server. + */ +enum ServerState { LISTENER, CONNECTING, WAIT_AUTH_1, WAIT_AUTH_2, CONNECTED }; + +/* Foward declarations */ +class TreeServer; +class TreeSocket; +class Link; +class ModuleSpanningTree; +class SpanningTreeUtilities; + +/* This hash_map holds the hash equivalent of the server + * tree, used for rapid linear lookups. + */ +typedef nspace::hash_map<std::string, TreeServer*, nspace::hash<string>, irc::StrHashComp> server_hash; + +typedef std::map<TreeServer*,TreeServer*> TreeServerList; + +/** A group of modules that implement InspSocketHook + * that we can use to hook our server to server connections. + */ +typedef std::map<irc::string, Module*> hookmodules; + +/** The Link class might as well be a struct, + * but this is C++ and we don't believe in structs (!). + * It holds the entire information of one <link> + * tag from the main config file. We maintain a list + * of them, and populate the list on rehash/load. + */ +class Link : public classbase +{ + public: + irc::string Name; + std::string IPAddr; + int Port; + std::string SendPass; + std::string RecvPass; + unsigned long AutoConnect; + time_t NextConnectTime; + bool HiddenFromStats; + std::string FailOver; + std::string Hook; + int Timeout; +}; + +class HandshakeTimer : public InspTimer +{ + private: + InspIRCd* Instance; + TreeSocket* sock; + Link* lnk; + SpanningTreeUtilities* Utils; + int thefd; + public: + HandshakeTimer(InspIRCd* Inst, TreeSocket* s, Link* l, SpanningTreeUtilities* u); + virtual void Tick(time_t TIME); +}; + + +/** Contains helper functions and variables for this module, + * and keeps them out of the global namespace + */ +class SpanningTreeUtilities +{ + private: + /** Creator server + */ + InspIRCd* ServerInstance; + public: + /** Creator module + */ + ModuleSpanningTree* Creator; + /** Flatten links and /MAP for non-opers + */ + bool FlatLinks; + /** Hide U-Lined servers in /MAP and /LINKS + */ + bool HideULines; + /** Announce TS changes to channels on merge + */ + bool AnnounceTSChange; + /** Synchronize timestamps between servers + */ + bool EnableTimeSync; + /** Socket bindings for listening sockets + */ + std::vector<TreeSocket*> Bindings; + /** This variable represents the root of the server tree + */ + TreeServer *TreeRoot; + /** IPs allowed to link to us + */ + std::vector<std::string> ValidIPs; + /** Hash of currently connected servers by name + */ + server_hash serverlist; + /** Holds the data from the <link> tags in the conf + */ + std::vector<Link> LinkBlocks; + /** Holds a bitmask of queued xline types waiting to be applied. + * Will be a mask containing values APPLY_GLINES, APPLY_KLINES, + * APPLY_QLINES and APPLY_ZLINES. + */ + int lines_to_apply; + + hookmodules hooks; + std::vector<std::string> hooknames; + + /** Initialise utility class + */ + SpanningTreeUtilities(InspIRCd* Instance, ModuleSpanningTree* Creator); + /** Destroy class and free listeners etc + */ + ~SpanningTreeUtilities(); + /** Send a message from this server to one other local or remote + */ + bool DoOneToOne(const std::string &prefix, const std::string &command, std::deque<std::string> ¶ms, std::string target); + /** Send a message from this server to all but one other, local or remote + */ + bool DoOneToAllButSender(const std::string &prefix, const std::string &command, std::deque<std::string> ¶ms, std::string omit); + /** Send a message from this server to all but one other, local or remote + */ + bool DoOneToAllButSender(const char* prefix, const char* command, std::deque<std::string> ¶ms, std::string omit); + /** Send a message from this server to all others + */ + bool DoOneToMany(const std::string &prefix, const std::string &command, std::deque<std::string> ¶ms); + /** Send a message from this server to all others + */ + bool DoOneToMany(const char* prefix, const char* command, std::deque<std::string> ¶ms); + /** Send a message from this server to all others, without doing any processing on the command (e.g. send it as-is with colons and all) + */ + bool DoOneToAllButSenderRaw(const std::string &data, const std::string &omit, const std::string &prefix, const irc::string &command, std::deque<std::string> ¶ms); + /** Read the spanningtree module's tags from the config file + */ + void ReadConfiguration(bool rebind); + /** Add a server to the server list for GetListOfServersForChannel + */ + void AddThisServer(TreeServer* server, TreeServerList &list); + /** Compile a list of servers which contain members of channel c + */ + void GetListOfServersForChannel(chanrec* c, TreeServerList &list, char status, const CUList &exempt_list); + /** Find a server by name + */ + TreeServer* FindServer(const std::string &ServerName); + /** Find a route to a server by name + */ + TreeServer* BestRouteTo(const std::string &ServerName); + /** Find a server by glob mask + */ + TreeServer* FindServerMask(const std::string &ServerName); + /** Returns true if this is a server name we recognise + */ + bool IsServer(const std::string &ServerName); + /** Attempt to connect to the failover link of link x + */ + void DoFailOver(Link* x); + /** Find a link tag from a server name + */ + Link* FindLink(const std::string& name); +}; + + +/** Each server in the tree is represented by one class of + * type TreeServer. A locally connected TreeServer can + * have a class of type TreeSocket associated with it, for + * remote servers, the TreeSocket entry will be NULL. + * Each server also maintains a pointer to its parent + * (NULL if this server is ours, at the top of the tree) + * and a pointer to its "Route" (see the comments in the + * constructors below), and also a dynamic list of pointers + * to its children which can be iterated recursively + * if required. Creating or deleting objects of type + i* TreeServer automatically maintains the hash_map of + * TreeServer items, deleting and inserting them as they + * are created and destroyed. + */ +class TreeServer : public classbase +{ + InspIRCd* ServerInstance; /* Creator */ + TreeServer* Parent; /* Parent entry */ + TreeServer* Route; /* Route entry */ + std::vector<TreeServer*> Children; /* List of child objects */ + irc::string ServerName; /* Server's name */ + std::string ServerDesc; /* Server's description */ + std::string VersionString; /* Version string or empty string */ + int UserCount; /* Not used in this version */ + int OperCount; /* Not used in this version */ + TreeSocket* Socket; /* For directly connected servers this points at the socket object */ + time_t NextPing; /* After this time, the server should be PINGed*/ + bool LastPingWasGood; /* True if the server responded to the last PING with a PONG */ + SpanningTreeUtilities* Utils; /* Utility class */ + + public: + + /** We don't use this constructor. Its a dummy, and won't cause any insertion + * of the TreeServer into the hash_map. See below for the two we DO use. + */ + TreeServer(SpanningTreeUtilities* Util, InspIRCd* Instance) : ServerInstance(Instance), Utils(Util) + { + Parent = NULL; + ServerName = ""; + ServerDesc = ""; + VersionString = ""; + UserCount = OperCount = 0; + VersionString = ServerInstance->GetVersionString(); + } + + /** We use this constructor only to create the 'root' item, Utils->TreeRoot, which + * represents our own server. Therefore, it has no route, no parent, and + * no socket associated with it. Its version string is our own local version. + */ + TreeServer(SpanningTreeUtilities* Util, InspIRCd* Instance, std::string Name, std::string Desc) : ServerInstance(Instance), ServerName(Name.c_str()), ServerDesc(Desc), Utils(Util) + { + Parent = NULL; + VersionString = ""; + UserCount = ServerInstance->UserCount(); + OperCount = ServerInstance->OperCount(); + VersionString = ServerInstance->GetVersionString(); + Route = NULL; + Socket = NULL; /* Fix by brain */ + AddHashEntry(); + } + + /** When we create a new server, we call this constructor to initialize it. + * This constructor initializes the server's Route and Parent, and sets up + * its ping counters so that it will be pinged one minute from now. + */ + TreeServer(SpanningTreeUtilities* Util, InspIRCd* Instance, std::string Name, std::string Desc, TreeServer* Above, TreeSocket* Sock) + : ServerInstance(Instance), Parent(Above), ServerName(Name.c_str()), ServerDesc(Desc), Socket(Sock), Utils(Util) + { + VersionString = ""; + UserCount = OperCount = 0; + this->SetNextPingTime(time(NULL) + 60); + this->SetPingFlag(); + + /* find the 'route' for this server (e.g. the one directly connected + * to the local server, which we can use to reach it) + * + * In the following example, consider we have just added a TreeServer + * class for server G on our network, of which we are server A. + * To route traffic to G (marked with a *) we must send the data to + * B (marked with a +) so this algorithm initializes the 'Route' + * value to point at whichever server traffic must be routed through + * to get here. If we were to try this algorithm with server B, + * the Route pointer would point at its own object ('this'). + * + * A + * / \ + * + B C + * / \ \ + * D E F + * / \ + * * G H + * + * We only run this algorithm when a server is created, as + * the routes remain constant while ever the server exists, and + * do not need to be re-calculated. + */ + + Route = Above; + if (Route == Utils->TreeRoot) + { + Route = this; + } + else + { + while (this->Route->GetParent() != Utils->TreeRoot) + { + this->Route = Route->GetParent(); + } + } + + /* Because recursive code is slow and takes a lot of resources, + * we store two representations of the server tree. The first + * is a recursive structure where each server references its + * children and its parent, which is used for netbursts and + * netsplits to dump the whole dataset to the other server, + * and the second is used for very fast lookups when routing + * messages and is instead a hash_map, where each item can + * be referenced by its server name. The AddHashEntry() + * call below automatically inserts each TreeServer class + * into the hash_map as it is created. There is a similar + * maintainance call in the destructor to tidy up deleted + * servers. + */ + + this->AddHashEntry(); + } + + int QuitUsers(const std::string &reason) + { + const char* reason_s = reason.c_str(); + std::vector<userrec*> time_to_die; + for (user_hash::iterator n = ServerInstance->clientlist->begin(); n != ServerInstance->clientlist->end(); n++) + { + if (!strcmp(n->second->server, this->ServerName.c_str())) + { + time_to_die.push_back(n->second); + } + } + for (std::vector<userrec*>::iterator n = time_to_die.begin(); n != time_to_die.end(); n++) + { + userrec* a = (userrec*)*n; + if (!IS_LOCAL(a)) + userrec::QuitUser(ServerInstance,a,reason_s); + } + return time_to_die.size(); + } + + /** This method is used to add the structure to the + * hash_map for linear searches. It is only called + * by the constructors. + */ + void AddHashEntry() + { + server_hash::iterator iter = Utils->serverlist.find(this->ServerName.c_str()); + if (iter == Utils->serverlist.end()) + Utils->serverlist[this->ServerName.c_str()] = this; + } + + /** This method removes the reference to this object + * from the hash_map which is used for linear searches. + * It is only called by the default destructor. + */ + void DelHashEntry() + { + server_hash::iterator iter = Utils->serverlist.find(this->ServerName.c_str()); + if (iter != Utils->serverlist.end()) + Utils->serverlist.erase(iter); + } + + /** These accessors etc should be pretty self- + * explanitory. + */ + TreeServer* GetRoute() + { + return Route; + } + + std::string GetName() + { + return ServerName.c_str(); + } + + std::string GetDesc() + { + return ServerDesc; + } + + std::string GetVersion() + { + return VersionString; + } + + void SetNextPingTime(time_t t) + { + this->NextPing = t; + LastPingWasGood = false; + } + + time_t NextPingTime() + { + return NextPing; + } + + bool AnsweredLastPing() + { + return LastPingWasGood; + } + + void SetPingFlag() + { + LastPingWasGood = true; + } + + int GetUserCount() + { + return UserCount; + } + + void AddUserCount() + { + UserCount++; + } + + void DelUserCount() + { + UserCount--; + } + + int GetOperCount() + { + return OperCount; + } + + TreeSocket* GetSocket() + { + return Socket; + } + + TreeServer* GetParent() + { + return Parent; + } + + void SetVersion(const std::string &Version) + { + VersionString = Version; + } + + unsigned int ChildCount() + { + return Children.size(); + } + + TreeServer* GetChild(unsigned int n) + { + if (n < Children.size()) + { + /* Make sure they cant request + * an out-of-range object. After + * all we know what these programmer + * types are like *grin*. + */ + return Children[n]; + } + else + { + return NULL; + } + } + + void AddChild(TreeServer* Child) + { + Children.push_back(Child); + } + + bool DelChild(TreeServer* Child) + { + for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++) + { + if (*a == Child) + { + Children.erase(a); + return true; + } + } + return false; + } + + /** Removes child nodes of this node, and of that node, etc etc. + * This is used during netsplits to automatically tidy up the + * server tree. It is slow, we don't use it for much else. + */ + bool Tidy() + { + bool stillchildren = true; + while (stillchildren) + { + stillchildren = false; + for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++) + { + TreeServer* s = (TreeServer*)*a; + s->Tidy(); + Children.erase(a); + DELETE(s); + stillchildren = true; + break; + } + } + return true; + } + + ~TreeServer() + { + /* We'd better tidy up after ourselves, eh? */ + this->DelHashEntry(); + } +}; + +/** Yay for fast searches! + * This is hundreds of times faster than recursion + * or even scanning a linked list, especially when + * there are more than a few servers to deal with. + * (read as: lots). + */ +TreeServer* SpanningTreeUtilities::FindServer(const std::string &ServerName) +{ + server_hash::iterator iter; + iter = serverlist.find(ServerName.c_str()); + if (iter != serverlist.end()) + { + return iter->second; + } + else + { + return NULL; + } +} + +/** Returns the locally connected server we must route a + * message through to reach server 'ServerName'. This + * only applies to one-to-one and not one-to-many routing. + * See the comments for the constructor of TreeServer + * for more details. + */ +TreeServer* SpanningTreeUtilities::BestRouteTo(const std::string &ServerName) +{ + if (ServerName.c_str() == TreeRoot->GetName()) + return NULL; + TreeServer* Found = FindServer(ServerName); + if (Found) + { + return Found->GetRoute(); + } + else + { + return NULL; + } +} + +/** Find the first server matching a given glob mask. + * Theres no find-using-glob method of hash_map [awwww :-(] + * so instead, we iterate over the list using an iterator + * and match each one until we get a hit. Yes its slow, + * deal with it. + */ +TreeServer* SpanningTreeUtilities::FindServerMask(const std::string &ServerName) +{ + for (server_hash::iterator i = serverlist.begin(); i != serverlist.end(); i++) + { + if (match(i->first.c_str(),ServerName.c_str())) + return i->second; + } + return NULL; +} + +/* A convenient wrapper that returns true if a server exists */ +bool SpanningTreeUtilities::IsServer(const std::string &ServerName) +{ + return (FindServer(ServerName) != NULL); +} + + +/** Handle /RCONNECT + */ +class cmd_rconnect : public command_t +{ + Module* Creator; + SpanningTreeUtilities* Utils; + public: + cmd_rconnect (InspIRCd* Instance, Module* Callback, SpanningTreeUtilities* Util) : command_t(Instance, "RCONNECT", 'o', 2), Creator(Callback), Utils(Util) + { + this->source = "m_spanningtree.so"; + syntax = "<remote-server-mask> <target-server-mask>"; + } + + CmdResult Handle (const char** parameters, int pcnt, userrec *user) + { + if (IS_LOCAL(user)) + { + if (!Utils->FindServer(parameters[0])) + { + user->WriteServ("NOTICE %s :*** RCONNECT: Server \002%s\002 isn't connected to the network!", user->nick, parameters[0]); + return CMD_FAILURE; + } + + user->WriteServ("NOTICE %s :*** RCONNECT: Sending remote connect to \002%s\002 to connect server \002%s\002.",user->nick,parameters[0],parameters[1]); + } + + /* Is this aimed at our server? */ + if (ServerInstance->MatchText(ServerInstance->Config->ServerName,parameters[0])) + { + /* Yes, initiate the given connect */ + ServerInstance->SNO->WriteToSnoMask('l',"Remote CONNECT from %s matching \002%s\002, connecting server \002%s\002",user->nick,parameters[0],parameters[1]); + const char* para[1]; + para[0] = parameters[1]; + std::string original_command = std::string("CONNECT ") + parameters[1]; + Creator->OnPreCommand("CONNECT", para, 1, user, true, original_command); + } + + return CMD_SUCCESS; + } +}; + + + +/** Every SERVER connection inbound or outbound is represented by + * an object of type TreeSocket. + * TreeSockets, being inherited from InspSocket, can be tied into + * the core socket engine, and we cn therefore receive activity events + * for them, just like activex objects on speed. (yes really, that + * is a technical term!) Each of these which relates to a locally + * connected server is assocated with it, by hooking it onto a + * TreeSocket class using its constructor. In this way, we can + * maintain a list of servers, some of which are directly connected, + * some of which are not. + */ +class TreeSocket : public InspSocket +{ + SpanningTreeUtilities* Utils; + std::string myhost; + std::string in_buffer; + ServerState LinkState; + std::string InboundServerName; + std::string InboundDescription; + int num_lost_users; + int num_lost_servers; + time_t NextPing; + bool LastPingWasGood; + bool bursting; + unsigned int keylength; + std::string ModuleList; + std::map<std::string,std::string> CapKeys; + Module* Hook; + + public: + + /** Because most of the I/O gubbins are encapsulated within + * InspSocket, we just call the superclass constructor for + * most of the action, and append a few of our own values + * to it. + */ + TreeSocket(SpanningTreeUtilities* Util, InspIRCd* SI, std::string host, int port, bool listening, unsigned long maxtime, Module* HookMod = NULL) + : InspSocket(SI, host, port, listening, maxtime), Utils(Util), Hook(HookMod) + { + myhost = host; + this->LinkState = LISTENER; + if (listening && Hook) + InspSocketHookRequest(this, (Module*)Utils->Creator, Hook).Send(); + } + + TreeSocket(SpanningTreeUtilities* Util, InspIRCd* SI, std::string host, int port, bool listening, unsigned long maxtime, std::string ServerName, Module* HookMod = NULL) + : InspSocket(SI, host, port, listening, maxtime), Utils(Util), Hook(HookMod) + { + myhost = ServerName; + this->LinkState = CONNECTING; + + if (Hook) + InspSocketHookRequest(this, (Module*)Utils->Creator, Hook).Send(); + } + + /** 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(SpanningTreeUtilities* Util, InspIRCd* SI, int newfd, char* ip, Module* HookMod = NULL) + : InspSocket(SI, newfd, ip), Utils(Util), Hook(HookMod) + { + this->LinkState = WAIT_AUTH_1; + + /* 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) + { + InspSocketHookRequest(this, (Module*)Utils->Creator, Hook).Send(); + Instance->Timers->AddTimer(new HandshakeTimer(Instance, this, &(Utils->LinkBlocks[0]), this->Utils)); + } + else + { + /* Otherwise, theres no lower layer transport in plain TCP/IP, + * so just send the capabilities right now. + */ + this->SendCapabilities(); + } + } + + ServerState GetLinkState() + { + return this->LinkState; + } + + Module* GetHook() + { + return this->Hook; + } + + ~TreeSocket() + { + if (Hook) + InspSocketUnhookRequest(this, (Module*)Utils->Creator, Hook).Send(); + } + + /** When an outbound connection finishes connecting, we receive + * this event, and must send our SERVER string to the other + * side. If the other side is happy, as outlined in the server + * to server docs on the inspircd.org site, the other side + * will then send back its own server string. + */ + virtual bool 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 (x->Name == this->myhost) + { + this->Instance->SNO->WriteToSnoMask('l',"Connection to \2"+myhost+"\2["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] started."); + + if (Hook) + { + InspSocketHookRequest(this, (Module*)Utils->Creator, Hook).Send(); + this->Instance->SNO->WriteToSnoMask('l',"Connection to \2"+myhost+"\2["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] using transport \2"+x->Hook+"\2"); + } + else + this->SendCapabilities(); + + /* found who we're supposed to be connecting to, send the neccessary gubbins. */ + if (Hook) + Instance->Timers->AddTimer(new HandshakeTimer(Instance, this, &(*x), this->Utils)); + else + this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+x->SendPass+" 0 :"+this->Instance->Config->ServerDesc); + + return true; + } + } + } + /* 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->Instance->SNO->WriteToSnoMask('l',"Connection to \2"+myhost+"\2 lost link tag(!)"); + return true; + } + + virtual void OnError(InspSocketError e) + { + /* We don't handle this method, because all our + * dirty work is done in OnClose() (see below) + * which is still called on error conditions too. + */ + if (e == I_ERR_CONNECT) + { + this->Instance->SNO->WriteToSnoMask('l',"Connection failed: Connection to \002"+myhost+"\002 refused"); + Link* MyLink = Utils->FindLink(myhost); + if (MyLink) + Utils->DoFailOver(MyLink); + } + } + + virtual int OnDisconnect() + { + /* For the same reason as above, we don't + * handle OnDisconnect() + */ + return true; + } + + /** Recursively send the server tree with distances as hops. + * This is used during network burst to inform the other server + * (and any of ITS servers too) of what servers we know about. + * If at any point any of these servers already exist on the other + * end, our connection may be terminated. The hopcounts given + * by this function are relative, this doesn't matter so long as + * they are all >1, as all the remote servers re-calculate them + * to be relative too, with themselves as hop 0. + */ + void SendServers(TreeServer* Current, TreeServer* s, int hops) + { + char command[1024]; + for (unsigned int q = 0; q < Current->ChildCount(); q++) + { + TreeServer* recursive_server = Current->GetChild(q); + if (recursive_server != s) + { + snprintf(command,1024,":%s SERVER %s * %d :%s",Current->GetName().c_str(),recursive_server->GetName().c_str(),hops,recursive_server->GetDesc().c_str()); + this->WriteLine(command); + this->WriteLine(":"+recursive_server->GetName()+" VERSION :"+recursive_server->GetVersion()); + /* down to next level */ + this->SendServers(recursive_server, s, hops+1); + } + } + } + + std::string MyCapabilities() + { + std::vector<std::string> modlist; + std::string capabilities = ""; + + for (int i = 0; i <= this->Instance->GetModuleCount(); i++) + { + if (this->Instance->modules[i]->GetVersion().Flags & VF_COMMON) + modlist.push_back(this->Instance->Config->module_names[i]); + } + sort(modlist.begin(),modlist.end()); + for (unsigned int i = 0; i < modlist.size(); i++) + { + if (i) + capabilities = capabilities + ","; + capabilities = capabilities + modlist[i]; + } + return capabilities; + } + + void SendCapabilities() + { + irc::commasepstream modulelist(MyCapabilities()); + + this->WriteLine("CAPAB START"); + + /* Send module names, split at 509 length */ + std::string item = "*"; + std::string line = "CAPAB MODULES "; + while ((item = modulelist.GetToken()) != "") + { + if (line.length() + item.length() + 1 > 509) + { + this->WriteLine(line); + line = "CAPAB MODULES "; + } + + if (line != "CAPAB MODULES ") + line.append(","); + + line.append(item); + } + if (line != "CAPAB MODULES ") + this->WriteLine(line); + + int ip6 = 0; + int ip6support = 0; +#ifdef IPV6 + ip6 = 1; +#endif +#ifdef SUPPORT_IP6LINKS + ip6support = 1; +#endif + this->WriteLine("CAPAB CAPABILITIES :NICKMAX="+ConvToStr(NICKMAX)+" HALFOP="+ConvToStr(this->Instance->Config->AllowHalfop)+" CHANMAX="+ConvToStr(CHANMAX)+" MAXMODES="+ConvToStr(MAXMODES)+" IDENTMAX="+ConvToStr(IDENTMAX)+" MAXQUIT="+ConvToStr(MAXQUIT)+" MAXTOPIC="+ConvToStr(MAXTOPIC)+" MAXKICK="+ConvToStr(MAXKICK)+" MAXGECOS="+ConvToStr(MAXGECOS)+" MAXAWAY="+ConvToStr(MAXAWAY)+" IP6NATIVE="+ConvToStr(ip6)+" IP6SUPPORT="+ConvToStr(ip6support)+" PROTOCOL="+ConvToStr(ProtocolVersion)); + + this->WriteLine("CAPAB END"); + } + + /* Check a comma seperated list for an item */ + bool HasItem(const std::string &list, const std::string &item) + { + irc::commasepstream seplist(list); + + std::string item2 = "*"; + while ((item2 = seplist.GetToken()) != "") + { + if (item2 == item) + return true; + } + + return false; + } + + /* Isolate and return the elements that are different between two comma seperated lists */ + std::string ListDifference(const std::string &one, const std::string &two) + { + irc::commasepstream list_one(one); + std::string item = "*"; + std::string result = ""; + while ((item = list_one.GetToken()) != "") + { + if (!HasItem(two, item)) + { + result.append(" "); + result.append(item); + } + } + return result; + } + + bool Capab(const std::deque<std::string> ¶ms) + { + if (params.size() < 1) + { + this->WriteLine("ERROR :Invalid number of parameters for CAPAB - Mismatched version"); + return false; + } + + if (params[0] == "START") + { + this->ModuleList = ""; + 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; + } + + 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("NICKMAX") == this->CapKeys.end()) || ((this->CapKeys.find("NICKMAX") != this->CapKeys.end()) && (this->CapKeys.find("NICKMAX")->second != ConvToStr(NICKMAX))))) + reason = "Maximum nickname lengths differ or remote nickname length not specified"; + + 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("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"; + + if (((this->CapKeys.find("IDENTMAX") == this->CapKeys.end()) || ((this->CapKeys.find("IDENTMAX") != this->CapKeys.end()) && (this->CapKeys.find("IDENTMAX")->second != ConvToStr(IDENTMAX))))) + reason = "Maximum ident lengths differ or remote ident length not specified"; + + if (((this->CapKeys.find("CHANMAX") == this->CapKeys.end()) || ((this->CapKeys.find("CHANMAX") != this->CapKeys.end()) && (this->CapKeys.find("CHANMAX")->second != ConvToStr(CHANMAX))))) + reason = "Maximum channel lengths differ or remote channel length not specified"; + + if (((this->CapKeys.find("MAXMODES") == this->CapKeys.end()) || ((this->CapKeys.find("MAXMODES") != this->CapKeys.end()) && (this->CapKeys.find("MAXMODES")->second != ConvToStr(MAXMODES))))) + reason = "Maximum modes per line differ or remote modes per line not specified"; + + if (((this->CapKeys.find("MAXQUIT") == this->CapKeys.end()) || ((this->CapKeys.find("MAXQUIT") != this->CapKeys.end()) && (this->CapKeys.find("MAXQUIT")->second != ConvToStr(MAXQUIT))))) + reason = "Maximum quit lengths differ or remote quit length not specified"; + + if (((this->CapKeys.find("MAXTOPIC") == this->CapKeys.end()) || ((this->CapKeys.find("MAXTOPIC") != this->CapKeys.end()) && (this->CapKeys.find("MAXTOPIC")->second != ConvToStr(MAXTOPIC))))) + reason = "Maximum topic lengths differ or remote topic length not specified"; + + if (((this->CapKeys.find("MAXKICK") == this->CapKeys.end()) || ((this->CapKeys.find("MAXKICK") != this->CapKeys.end()) && (this->CapKeys.find("MAXKICK")->second != ConvToStr(MAXKICK))))) + reason = "Maximum kick lengths differ or remote kick length not specified"; + + if (((this->CapKeys.find("MAXGECOS") == this->CapKeys.end()) || ((this->CapKeys.find("MAXGECOS") != this->CapKeys.end()) && (this->CapKeys.find("MAXGECOS")->second != ConvToStr(MAXGECOS))))) + reason = "Maximum GECOS (fullname) lengths differ or remote GECOS length not specified"; + + if (((this->CapKeys.find("MAXAWAY") == this->CapKeys.end()) || ((this->CapKeys.find("MAXAWAY") != this->CapKeys.end()) && (this->CapKeys.find("MAXAWAY")->second != ConvToStr(MAXAWAY))))) + reason = "Maximum awaymessage lengths differ or remote awaymessage length not specified"; + + if (reason.length()) + { + this->WriteLine("ERROR :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 = "*"; + while ((item = capabs.GetToken()) != "") + { + /* 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 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 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->WriteOpers("Server \002"+Current->GetName()+"\002 split: "+reason); + } + else + { + this->Instance->WriteOpers("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->WriteOpers("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 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; + } + + /* TS is equal: Merge the mode changes, use voooodoooooo on modes + * with parameters. + */ + if (TS == ourTS) + { + ModeHandler* mh = NULL; + unsigned long paramptr = 3; + std::string to_bounce = ""; + std::string to_keep = ""; + std::vector<std::string> params_to_keep; + std::string params_to_bounce = ""; + bool adding = true; + char cur_change = 1; + char old_change = 0; + char old_bounce_change = 0; + /* Merge modes, basically do special stuff to mode with params */ + for (std::string::iterator x = params[2].begin(); x != params[2].end(); x++) + { + switch (*x) + { + case '-': + adding = false; + break; + case '+': + adding = true; + break; + default: + if (adding) + { + /* We only care about whats being set, + * not whats being unset + */ + mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER); + + if ((mh) && (mh->GetNumParams(adding) > 0) && (!mh->IsListMode())) + { + /* We only want to do special things to + * modes with parameters, we are going to rewrite + * those parameters + */ + ModePair ret; + adding ? cur_change = '+' : cur_change = '-'; + + ret = mh->ModeSet(smode ? NULL : who, dst, chan, params[paramptr]); + + /* The mode is set here, check which we should keep */ + if (ret.first) + { + bool which_to_keep = mh->CheckTimeStamp(TS, ourTS, params[paramptr], ret.second, chan); + + if (which_to_keep == true) + { + /* Keep ours, bounce theirs: + * Send back ours to them and + * drop their mode changs + */ + adding ? cur_change = '+' : cur_change = '-'; + if (cur_change != old_bounce_change) + to_bounce += cur_change; + to_bounce += *x; + old_bounce_change = cur_change; + + if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size())) + params_to_bounce.append(" ").append(ret.second); + } + else + { + /* Keep theirs: Accept their mode change, + * do nothing else + */ + adding ? cur_change = '+' : cur_change = '-'; + if (cur_change != old_change) + to_keep += cur_change; + to_keep += *x; + old_change = cur_change; + + if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size())) + params_to_keep.push_back(params[paramptr]); + } + } + else + { + /* Mode isnt set here, we want it */ + adding ? cur_change = '+' : cur_change = '-'; + if (cur_change != old_change) + to_keep += cur_change; + to_keep += *x; + old_change = cur_change; + + if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size())) + params_to_keep.push_back(params[paramptr]); + } + + paramptr++; + } + else + { + mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER); + + if (mh) + { + adding ? cur_change = '+' : cur_change = '-'; + + /* Just keep this, safe to merge with no checks + * it has no parameters + */ + + if (cur_change != old_change) + to_keep += cur_change; + to_keep += *x; + old_change = cur_change; + + if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size())) + { + params_to_keep.push_back(params[paramptr++]); + } + } + } + } + else + { + mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER); + + if (mh) + { + /* Taking a mode away */ + adding ? cur_change = '+' : cur_change = '-'; + + if (cur_change != old_change) + to_keep += cur_change; + to_keep += *x; + old_change = cur_change; + + if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size())) + params_to_keep.push_back(params[paramptr++]); + } + } + break; + } + } + + if (to_bounce.length()) + { + std::deque<std::string> newparams; + newparams.push_back(params[0]); + newparams.push_back(ConvToStr(ourTS)); + newparams.push_back(to_bounce+params_to_bounce); + Utils->DoOneToOne(this->Instance->Config->ServerName,"FMODE",newparams,sourceserv); + } + + if (to_keep.length()) + { + unsigned int n = 2; + unsigned int q = 0; + modelist[0] = params[0].c_str(); + modelist[1] = to_keep.c_str(); + + if (params_to_keep.size() > 0) + { + for (q = 0; (q < params_to_keep.size()) && (q < 64); q++) + { + modelist[n++] = params_to_keep[q].c_str(); + } + } + + 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); + } + } + else + /* U-lined servers always win regardless of their TS */ + if ((TS > ourTS) && (!this->Instance->ULine(source.c_str()))) + { + /* Bounce the mode back to its sender.* We use our lower TS, so the other end + * SHOULD accept it, if its clock is right. + * + * NOTE: We should check that we arent bouncing anything thats already set at this end. + * If we are, bounce +ourmode to 'reinforce' it. This prevents desyncs. + * e.g. They send +l 50, we have +l 10 set. rather than bounce -l 50, we bounce +l 10. + * + * Thanks to jilles for pointing out this one-hell-of-an-issue before i even finished + * writing the code. It took me a while to come up with this solution. + * + * XXX: BE SURE YOU UNDERSTAND THIS CODE FULLY BEFORE YOU MESS WITH IT. + */ + + std::deque<std::string> newparams; /* New parameter list we send back */ + newparams.push_back(params[0]); /* Target, user or channel */ + newparams.push_back(ConvToStr(ourTS)); /* Timestamp value of the target */ + newparams.push_back(""); /* This contains the mode string. For now + * it's empty, we fill it below. + */ + + /* Intelligent mode bouncing. Don't just invert, reinforce any modes which are already + * set to avoid a desync here. + */ + std::string modebounce = ""; + bool adding = true; + unsigned int t = 3; + ModeHandler* mh = NULL; + char cur_change = 1; + char old_change = 0; + for (std::string::iterator x = params[2].begin(); x != params[2].end(); x++) + { + /* Iterate over all mode chars in the sent set */ + switch (*x) + { + /* Adding or subtracting modes? */ + case '-': + adding = false; + break; + case '+': + adding = true; + break; + default: + /* Find the mode handler for this mode */ + mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER); + + /* Got a mode handler? + * This also prevents us bouncing modes we have no handler for. + */ + if (mh) + { + ModePair ret; + std::string p = ""; + + /* Does the mode require a parameter right now? + * If it does, fetch it if we can + */ + if ((mh->GetNumParams(adding) > 0) && (t < params.size())) + p = params[t++]; + + /* Call the ModeSet method to determine if its set with the + * given parameter here or not. + */ + ret = mh->ModeSet(smode ? NULL : who, dst, chan, p); + + /* XXX: Really. Dont ask. + * Determine from if its set combined with what the current + * 'state' is (adding or not) as to wether we should 'invert' + * or 'reinforce' the mode change + */ + (!ret.first ? (adding ? cur_change = '-' : cur_change = '+') : (!adding ? cur_change = '-' : cur_change = '+')); + + /* Quickly determine if we have 'flipped' from + to -, + * or - to +, to prevent unneccessary +/- chars in the + * output string that waste bandwidth + */ + if (cur_change != old_change) + modebounce += cur_change; + old_change = cur_change; + + /* Add the mode character to the output string */ + modebounce += mh->GetModeChar(); + + /* We got a parameter back from ModeHandler::ModeSet, + * are we supposed to be sending one out right now? + */ + if (ret.second.length()) + { + if (mh->GetNumParams(cur_change == '+') > 0) + /* Yes we're supposed to be sending out + * the parameter. Make sure it goes + */ + newparams.push_back(ret.second); + } + + } + break; + } + } + + /* Update the parameters for FMODE with the new 'bounced' string */ + newparams[2] = modebounce; + /* Only send it back the way it came, no need to send it anywhere else */ + Utils->DoOneToOne(this->Instance->Config->ServerName,"FMODE",newparams,sourceserv); + } + else + { + /* The server was ulined, but something iffy is up with the TS. + * Sound the alarm bells! + */ + if ((this->Instance->ULine(sourceserv.c_str())) && (TS > ourTS)) + { + this->Instance->WriteOpers("\2WARNING!\2 U-Lined server '%s' has bad TS for '%s' (accepted change): \2SYNC YOUR CLOCKS\2 to avoid this notice",sourceserv.c_str(),params[0].c_str()); + } + /* Allow the mode, route it to either server or user command handling */ + 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); + } + /* Are we supposed to free the userrec? */ + if (smode) + DELETE(who); + + return true; + } + + /** FTOPIC command */ + bool 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(),NICKMAX-1); + 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(source.c_str(), "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; + } + + /** FJOIN, similar to TS6 SJOIN, but not quite. */ + bool ForceJoin(const std::string &source, std::deque<std::string> ¶ms) + { + /* 1.1 FJOIN works as follows: + * + * Each FJOIN is sent along with a timestamp, and the side with the lowest + * timestamp 'wins'. From this point on we will refer to this side as the + * winner. The side with the higher timestamp loses, from this point on we + * will call this side the loser or losing side. This should be familiar to + * anyone who's dealt with dreamforge or TS6 before. + * + * When two sides of a split heal and this occurs, the following things + * will happen: + * + * If the timestamps are exactly equal, both sides merge their privilages + * and users, as in InspIRCd 1.0 and ircd2.8. The channels have not been + * re-created during a split, this is safe to do. + * + * + * If the timestamps are NOT equal, the losing side removes all privilage + * modes from all of its users that currently exist in the channel, before + * introducing new users into the channel which are listed in the FJOIN + * command's parameters. This means, all modes +ohv, and privilages added + * by modules, such as +qa. The losing side then LOWERS its timestamp value + * of the channel to match that of the winning side, and the modes of the + * users of the winning side are merged in with the losing side. The loser + * then sends out a set of FMODE commands which 'confirm' that it just + * removed all privilage modes from its existing users, which allows for + * services packages to still work correctly without needing to know the + * timestamping rules which InspIRCd follows. In TS6 servers this is always + * a problem, and services packages must contain code which explicitly + * behaves as TS6 does, removing ops from the losing side of a split where + * neccessary within its internal records, as this state information is + * not explicitly echoed out in that protocol. + * + * The winning side on the other hand will ignore all user modes from the + * losing side, so only its own modes get applied. Life is simple for those + * who succeed at internets. :-) + * + * NOTE: Unlike TS6 and dreamforge and other protocols which have SJOIN, + * FJOIN does not contain the simple-modes such as +iklmnsp. Why not, + * you ask? Well, quite simply because we don't need to. They'll be sent + * after the FJOIN by FMODE, and FMODE is timestamped, so in the event + * the losing side sends any modes for the channel which shouldnt win, + * they wont as their timestamp will be too high :-) + */ + + if (params.size() < 3) + return true; + + char first[MAXBUF]; /* The first parameter of the mode command */ + char modestring[MAXBUF]; /* The mode sequence (2nd parameter) of the mode command */ + char* mode_users[127]; /* The values used by the mode command */ + memset(&mode_users,0,sizeof(mode_users)); /* Initialize mode parameters */ + mode_users[0] = first; /* Set this up to be our on-stack value */ + mode_users[1] = modestring; /* Same here as above */ + strcpy(modestring,"+"); /* Initialize the mode sequence to just '+' */ + unsigned int modectr = 2; /* Pointer to the third mode parameter (e.g. the one after the +-sequence) */ + + userrec* who = NULL; /* User we are currently checking */ + std::string channel = params[0]; /* Channel name, as a string */ + time_t TS = atoi(params[1].c_str()); /* Timestamp given to us for remote side */ + bool created = false; + + /* Try and find the channel */ + chanrec* chan = this->Instance->FindChan(channel); + + /* Initialize channel name in the mode parameters */ + strlcpy(mode_users[0],channel.c_str(),MAXBUF); + + /* default TS is a high value, which if we dont have this + * channel will let the other side apply their modes. + */ + time_t ourTS = Instance->Time(true)+600; + + /* Does this channel exist? if it does, get its REAL timestamp */ + if (chan) + ourTS = chan->age; + else + created = true; /* don't perform deops, and set TS to correct time after processing. */ + + /* In 1.1, if they have the newer channel, we immediately clear + * all status modes from our users. We then accept their modes. + * If WE have the newer channel its the other side's job to do this. + * Note that this causes the losing server to send out confirming + * FMODE lines. + */ + if (ourTS > TS) + { + std::deque<std::string> param_list; + + /* Lower the TS here */ + if (Utils->AnnounceTSChange && chan) + chan->WriteChannelWithServ(Instance->Config->ServerName, + "NOTICE %s :TS for %s changed from %lu to %lu", chan->name, chan->name, ourTS, TS); + ourTS = TS; + + /* Zap all the privilage modes on our side, if the channel exists here */ + if (!created) + { + param_list.push_back(channel); + /* Do this first! */ + chan->age = TS; + this->RemoveStatus(Instance->Config->ServerName, param_list); + } + } + + /* Put the final parameter of the FJOIN into a tokenstream ready to split it */ + irc::tokenstream users(params[2]); + std::string item = "*"; + + /* do this first, so our mode reversals are correctly received by other servers + * if there is a TS collision. + */ + params[2] = ":" + params[2]; + Utils->DoOneToAllButSender(source,"FJOIN",params,source); + + /* Now, process every 'prefixes,nick' pair */ + while (item != "") + { + /* Find next user */ + item = users.GetToken(); + + const char* usr = item.c_str(); + + /* Safety check just to make sure someones not sent us an FJOIN full of spaces + * (is this even possible?) */ + if (usr && *usr) + { + const char* permissions = usr; + int ntimes = 0; + char* nm = new char[MAXBUF]; + char* tnm = nm; + + /* Iterate through all the prefix values, convert them from prefixes + * to mode letters, and append them to the mode sequence + */ + while ((*permissions) && (*permissions != ',') && (ntimes < MAXBUF)) + { + ModeHandler* mh = Instance->Modes->FindPrefix(*permissions); + if (mh) + { + /* This is a valid prefix */ + ntimes++; + *tnm++ = mh->GetModeChar(); + } + else + { + /* Not a valid prefix... + * danger bill bobbertson! (that's will robinsons older brother ;-) ...) + */ + this->Instance->WriteOpers("ERROR: We received a user with an unknown prefix '%c'. Closed connection to avoid a desync.",*permissions); + this->WriteLine(std::string("ERROR :Invalid prefix '")+(*permissions)+"' in FJOIN"); + return false; + } + usr++; + permissions++; + } + + /* Null terminate modes */ + *tnm = 0; + /* Advance past the comma, to the nick */ + usr++; + + /* Check the user actually exists */ + who = this->Instance->FindNick(usr); + if (who) + { + /* Did they get any modes? How many times? */ + strlcat(modestring, nm, MAXBUF); + for (int k = 0; k < ntimes; k++) + mode_users[modectr++] = strdup(usr); + + /* Free temporary buffer used for mode sequence */ + delete[] nm; + + /* Check that the user's 'direction' is correct + * based on the server sending the FJOIN. We must + * check each nickname in turn, because the origin of + * the FJOIN may be different to the origin of the nicks + * in the command itself. + */ + TreeServer* route_back_again = Utils->BestRouteTo(who->server); + if ((!route_back_again) || (route_back_again->GetSocket() != this)) + { + /* Oh dear oh dear. */ + continue; + } + /* Finally, we can actually place the user into the channel. + * We're sure its right. Final answer, phone a friend. + */ + chanrec::JoinUser(this->Instance, who, channel.c_str(), true, ""); + + /* Have we already queued up MAXMODES modes with parameters + * (+qaohv) ready to be sent to the server? + */ + if (modectr >= (MAXMODES-1)) + { + /* Only actually give the users any status if we lost + * the FJOIN or drew (equal timestamps). + * It isn't actually possible for ourTS to be > TS here, + * only possible to actually have ourTS == TS, or + * ourTS < TS, because if we lost, we already lowered + * our TS above before we entered this loop. We only + * check >= as a safety measure, in case someone stuffed + * up. If someone DID stuff up, it was most likely me. + * Note: I do not like baseball bats in the face... + */ + if (ourTS >= TS) + { + this->Instance->SendMode((const char**)mode_users,modectr,who); + + /* Something stuffed up, and for some reason, the timestamp is + * NOT lowered right now and should be. Lower it. Usually this + * code won't be executed, doubtless someone will remove it some + * day soon. + */ + if (ourTS > TS) + { + Instance->Log(DEFAULT,"Channel TS for %s changed from %lu to %lu",chan->name,ourTS,TS); + chan->age = TS; + ourTS = TS; + } + } + + /* Reset all this back to defaults, and + * free any ram we have left allocated. + */ + strcpy(mode_users[1],"+"); + for (unsigned int f = 2; f < modectr; f++) + free(mode_users[f]); + modectr = 2; + } + } + else + { + /* Remember to free this */ + delete[] nm; + /* If we got here, there's a nick in FJOIN which doesnt exist on this server. + * We don't try to process the nickname here (that WOULD cause a segfault because + * we'd be playing with null pointers) however, we DO pass the nickname on, just + * in case somehow we're desynched, so that other users which might be able to see + * the nickname get their fair chance to process it. + */ + Instance->Log(SPARSE,"Warning! Invalid user in FJOIN to channel %s IGNORED", channel.c_str()); + continue; + } + } + } + + /* there werent enough modes built up to flush it during FJOIN, + * or, there are a number left over. flush them out. + */ + if ((modectr > 2) && (who) && (chan)) + { + if (ourTS >= TS) + { + /* Our channel is newer than theirs. Evil deeds must be afoot. */ + this->Instance->SendMode((const char**)mode_users,modectr,who); + /* Yet again, we can't actually get a true value here, if everything else + * is working as it should. + */ + if (ourTS > TS) + { + Instance->Log(DEFAULT,"Channel TS for %s changed from %lu to %lu",chan->name,ourTS,TS); + chan->age = TS; + ourTS = TS; + } + } + + /* Free anything we have left to free */ + for (unsigned int f = 2; f < modectr; f++) + free(mode_users[f]); + } + + /* if we newly created the channel, set it's TS properly. */ + if (created) + { + /* find created channel .. */ + chan = this->Instance->FindChan(channel); + if (chan) + /* w00t said this shouldnt be needed but it is. + * This isnt strictly true, as chan can be NULL + * if a nick collision has occured and therefore + * the channel was never created. + */ + chan->age = TS; + } + + /* All done. That wasnt so bad was it, you can wipe + * the sweat from your forehead now. :-) + */ + return true; + } + + /** NICK command */ + bool IntroduceClient(const std::string &source, std::deque<std::string> ¶ms) + { + if (params.size() < 8) + return true; + if (params.size() > 8) + { + this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+params[1]+" :Invalid client introduction ("+params[1]+"?)"); + return true; + } + // NICK age nick host dhost ident +modes ip :gecos + // 0 1 2 3 4 5 6 7 + time_t age = atoi(params[0].c_str()); + + const char* tempnick = params[1].c_str(); + Instance->Log(DEBUG,"New remote client %s",tempnick); + + user_hash::iterator iter = this->Instance->clientlist->find(tempnick); + + if (iter != this->Instance->clientlist->end()) + { + // nick collision + this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+tempnick+" :Nickname collision"); + userrec::QuitUser(this->Instance, iter->second, "Nickname collision"); + return true; + } + + userrec* _new = new userrec(this->Instance); + (*(this->Instance->clientlist))[tempnick] = _new; + _new->SetFd(FD_MAGIC_NUMBER); + strlcpy(_new->nick, tempnick,NICKMAX-1); + strlcpy(_new->host, params[2].c_str(),63); + strlcpy(_new->dhost, params[3].c_str(),63); + _new->server = this->Instance->FindServerNamePtr(source.c_str()); + strlcpy(_new->ident, params[4].c_str(),IDENTMAX); + strlcpy(_new->fullname, params[7].c_str(),MAXGECOS); + _new->registered = REG_ALL; + _new->signon = age; + + /* + * we need to remove the + from the modestring, so we can do our stuff + */ + std::string::size_type pos_after_plus = params[5].find_first_not_of('+'); + if (pos_after_plus != std::string::npos) + params[5] = params[5].substr(pos_after_plus); + + + for (std::string::iterator v = params[5].begin(); v != params[5].end(); v++) + { + _new->modes[(*v)-65] = 1; + /* For each mode thats set, increase counter */ + ModeHandler* mh = Instance->Modes->FindMode(*v, MODETYPE_USER); + if (mh) + mh->ChangeCount(1); + } + + /* now we've done with modes processing, put the + back for remote servers */ + params[5] = "+" + params[5]; + +#ifdef SUPPORT_IP6LINKS + if (params[6].find_first_of(":") != std::string::npos) + _new->SetSockAddr(AF_INET6, params[6].c_str(), 0); + else +#endif + _new->SetSockAddr(AF_INET, params[6].c_str(), 0); + + Instance->AddGlobalClone(_new); + + this->Instance->SNO->WriteToSnoMask('C',"Client connecting at %s: %s!%s@%s [%s]",_new->server,_new->nick,_new->ident,_new->host, _new->GetIPString()); + + params[7] = ":" + params[7]; + Utils->DoOneToAllButSender(source,"NICK", params, source); + + // Increment the Source Servers User Count.. + TreeServer* SourceServer = Utils->FindServer(source); + if (SourceServer) + { + SourceServer->AddUserCount(); + } + + FOREACH_MOD_I(Instance,I_OnPostConnect,OnPostConnect(_new)); + + return true; + } + + /** Send one or more FJOINs for a channel of users. + * If the length of a single line is more than 480-NICKMAX + * in length, it is split over multiple lines. + */ + void SendFJoins(TreeServer* Current, chanrec* c) + { + std::string buffer; + char list[MAXBUF]; + std::string individual_halfops = std::string(":")+this->Instance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age); + + size_t dlen, curlen; + dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->ServerName,c->name,(unsigned long)c->age); + int numusers = 0; + char* ptr = list + dlen; + + CUList *ulist = c->GetUsers(); + std::string modes = ""; + std::string params = ""; + + for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++) + { + // The first parameter gets a : before it + size_t ptrlen = snprintf(ptr, MAXBUF, " %s%s,%s", !numusers ? ":" : "", c->GetAllPrefixChars(i->second), i->second->nick); + + curlen += ptrlen; + ptr += ptrlen; + + numusers++; + + if (curlen > (480-NICKMAX)) + { + buffer.append(list).append("\r\n"); + + dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->ServerName,c->name,(unsigned long)c->age); + ptr = list + dlen; + ptrlen = 0; + numusers = 0; + } + } + + if (numusers) + buffer.append(list).append("\r\n"); + + /* Sorry for the hax. Because newly created channels assume +nt, + * if this channel doesnt have +nt, explicitly send -n and -t for the missing modes. + */ + bool inverted = false; + if (!c->IsModeSet('n')) + { + modes.append("-n"); + inverted = true; + } + if (!c->IsModeSet('t')) + { + modes.append("-t"); + inverted = true; + } + if (inverted) + { + modes.append("+"); + } + + for (BanList::iterator b = c->bans.begin(); b != c->bans.end(); b++) + { + modes.append("b"); + params.append(" ").append(b->data); + + if (params.length() >= MAXMODES) + { + /* Wrap at MAXMODES */ + buffer.append(":").append(this->Instance->Config->ServerName).append(" FMODE ").append(c->name).append(" ").append(ConvToStr(c->age)).append(" +").append(modes).append(params).append("\r\n"); + modes = ""; + params = ""; + } + } + + buffer.append(":").append(this->Instance->Config->ServerName).append(" FMODE ").append(c->name).append(" ").append(ConvToStr(c->age)).append(" +").append(c->ChanModes(true)); + + /* Only send these if there are any */ + if (!modes.empty()) + buffer.append("\r\n").append(":").append(this->Instance->Config->ServerName).append(" FMODE ").append(c->name).append(" ").append(ConvToStr(c->age)).append(" +").append(modes).append(params); + + this->WriteLine(buffer); + } + + /** Send G, Q, Z and E lines */ + void SendXLines(TreeServer* Current) + { + char data[MAXBUF]; + std::string buffer; + std::string n = this->Instance->Config->ServerName; + const char* sn = n.c_str(); + + /* Yes, these arent too nice looking, but they get the job done */ + for (std::vector<ZLine*>::iterator i = Instance->XLines->zlines.begin(); i != Instance->XLines->zlines.end(); i++) + { + snprintf(data,MAXBUF,":%s ADDLINE Z %s %s %lu %lu :%s\r\n",sn,(*i)->ipaddr,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason); + buffer.append(data); + } + for (std::vector<QLine*>::iterator i = Instance->XLines->qlines.begin(); i != Instance->XLines->qlines.end(); i++) + { + snprintf(data,MAXBUF,":%s ADDLINE Q %s %s %lu %lu :%s\r\n",sn,(*i)->nick,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason); + buffer.append(data); + } + for (std::vector<GLine*>::iterator i = Instance->XLines->glines.begin(); i != Instance->XLines->glines.end(); i++) + { + snprintf(data,MAXBUF,":%s ADDLINE G %s@%s %s %lu %lu :%s\r\n",sn,(*i)->identmask,(*i)->hostmask,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason); + buffer.append(data); + } + for (std::vector<ELine*>::iterator i = Instance->XLines->elines.begin(); i != Instance->XLines->elines.end(); i++) + { + snprintf(data,MAXBUF,":%s ADDLINE E %s@%s %s %lu %lu :%s\r\n",sn,(*i)->identmask,(*i)->hostmask,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason); + buffer.append(data); + } + for (std::vector<ZLine*>::iterator i = Instance->XLines->pzlines.begin(); i != Instance->XLines->pzlines.end(); i++) + { + snprintf(data,MAXBUF,":%s ADDLINE Z %s %s %lu %lu :%s\r\n",sn,(*i)->ipaddr,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason); + buffer.append(data); + } + for (std::vector<QLine*>::iterator i = Instance->XLines->pqlines.begin(); i != Instance->XLines->pqlines.end(); i++) + { + snprintf(data,MAXBUF,":%s ADDLINE Q %s %s %lu %lu :%s\r\n",sn,(*i)->nick,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason); + buffer.append(data); + } + for (std::vector<GLine*>::iterator i = Instance->XLines->pglines.begin(); i != Instance->XLines->pglines.end(); i++) + { + snprintf(data,MAXBUF,":%s ADDLINE G %s@%s %s %lu %lu :%s\r\n",sn,(*i)->identmask,(*i)->hostmask,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason); + buffer.append(data); + } + for (std::vector<ELine*>::iterator i = Instance->XLines->pelines.begin(); i != Instance->XLines->pelines.end(); i++) + { + snprintf(data,MAXBUF,":%s ADDLINE E %s@%s %s %lu %lu :%s\r\n",sn,(*i)->identmask,(*i)->hostmask,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason); + buffer.append(data); + } + + if (!buffer.empty()) + this->WriteLine(buffer); + } + + /** Send channel modes and topics */ + void SendChannelModes(TreeServer* Current) + { + char data[MAXBUF]; + std::deque<std::string> list; + std::string n = this->Instance->Config->ServerName; + const char* sn = n.c_str(); + for (chan_hash::iterator c = this->Instance->chanlist->begin(); c != this->Instance->chanlist->end(); c++) + { + SendFJoins(Current, c->second); + if (*c->second->topic) + { + snprintf(data,MAXBUF,":%s FTOPIC %s %lu %s :%s",sn,c->second->name,(unsigned long)c->second->topicset,c->second->setby,c->second->topic); + this->WriteLine(data); + } + FOREACH_MOD_I(this->Instance,I_OnSyncChannel,OnSyncChannel(c->second,(Module*)Utils->Creator,(void*)this)); + list.clear(); + c->second->GetExtList(list); + for (unsigned int j = 0; j < list.size(); j++) + { + FOREACH_MOD_I(this->Instance,I_OnSyncChannelMetaData,OnSyncChannelMetaData(c->second,(Module*)Utils->Creator,(void*)this,list[j])); + } + } + } + + /** send all users and their oper state/modes */ + void SendUsers(TreeServer* Current) + { + char data[MAXBUF]; + std::deque<std::string> list; + std::string dataline; + for (user_hash::iterator u = this->Instance->clientlist->begin(); u != this->Instance->clientlist->end(); u++) + { + if (u->second->registered == REG_ALL) + { + snprintf(data,MAXBUF,":%s NICK %lu %s %s %s %s +%s %s :%s",u->second->server,(unsigned long)u->second->age,u->second->nick,u->second->host,u->second->dhost,u->second->ident,u->second->FormatModes(),u->second->GetIPString(),u->second->fullname); + this->WriteLine(data); + if (*u->second->oper) + { + snprintf(data,MAXBUF,":%s OPERTYPE %s", u->second->nick, u->second->oper); + this->WriteLine(data); + } + if (*u->second->awaymsg) + { + snprintf(data,MAXBUF,":%s AWAY :%s", u->second->nick, u->second->awaymsg); + this->WriteLine(data); + } + FOREACH_MOD_I(this->Instance,I_OnSyncUser,OnSyncUser(u->second,(Module*)Utils->Creator,(void*)this)); + list.clear(); + u->second->GetExtList(list); + for (unsigned int j = 0; j < list.size(); j++) + { + FOREACH_MOD_I(this->Instance,I_OnSyncUserMetaData,OnSyncUserMetaData(u->second,(Module*)Utils->Creator,(void*)this,list[j])); + } + } + } + } + + /** This function is called when we want to send a netburst to a local + * server. There is a set order we must do this, because for example + * users require their servers to exist, and channels require their + * users to exist. You get the idea. + */ + void DoBurst(TreeServer* s) + { + std::string burst = "BURST "+ConvToStr(Instance->Time(true)); + std::string endburst = "ENDBURST"; + // Because by the end of the netburst, it could be gone! + std::string name = s->GetName(); + this->Instance->SNO->WriteToSnoMask('l',"Bursting to \2"+name+"\2."); + this->WriteLine(burst); + /* send our version string */ + this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" VERSION :"+this->Instance->GetVersionString()); + /* Send server tree */ + this->SendServers(Utils->TreeRoot,s,1); + /* Send users and their oper status */ + this->SendUsers(s); + /* Send everything else (channel modes, xlines etc) */ + this->SendChannelModes(s); + this->SendXLines(s); + FOREACH_MOD_I(this->Instance,I_OnSyncOtherMetaData,OnSyncOtherMetaData((Module*)Utils->Creator,(void*)this)); + this->WriteLine(endburst); + this->Instance->SNO->WriteToSnoMask('l',"Finished bursting to \2"+name+"\2."); + } + + /** 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 InspSocket::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. + */ + virtual bool OnDataReady() + { + char* data = this->Read(); + /* Check that the data read is a valid pointer and it has some content */ + if (data && *data) + { + 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 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; + } + } + return true; + } + /* EAGAIN returns an empty but non-NULL string, so this + * evaluates to TRUE for EAGAIN but to FALSE for EOF. + */ + return (data && !*data); + } + + int WriteLine(std::string line) + { + Instance->Log(DEBUG, "-> %s", line.c_str()); + line.append("\r\n"); + return this->Write(line); + } + + /* Handle ERROR command */ + bool Error(std::deque<std::string> ¶ms) + { + if (params.size() < 1) + return false; + this->Instance->SNO->WriteToSnoMask('l',"ERROR from %s: %s",(InboundServerName != "" ? InboundServerName.c_str() : myhost.c_str()),params[0].c_str()); + /* we will return false to cause the socket to close. */ + return false; + } + + /** remote MOTD. leet, huh? */ + bool Motd(const std::string &prefix, std::deque<std::string> ¶ms) + { + if (params.size() > 0) + { + if (this->Instance->MatchText(this->Instance->Config->ServerName, params[0])) + { + /* It's for our server */ + string_list results; + userrec* source = this->Instance->FindNick(prefix); + + if (source) + { + std::deque<std::string> par; + par.push_back(prefix); + par.push_back(""); + + if (!Instance->Config->MOTD.size()) + { + par[1] = std::string("::")+Instance->Config->ServerName+" 422 "+source->nick+" :Message of the day file is missing."; + Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server); + return true; + } + + par[1] = std::string("::")+Instance->Config->ServerName+" 375 "+source->nick+" :"+Instance->Config->ServerName+" message of the day"; + Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server); + + for (unsigned int i = 0; i < Instance->Config->MOTD.size(); i++) + { + par[1] = std::string("::")+Instance->Config->ServerName+" 372 "+source->nick+" :- "+Instance->Config->MOTD[i]; + Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server); + } + + par[1] = std::string("::")+Instance->Config->ServerName+" 376 "+source->nick+" End of message of the day."; + Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server); + } + } + else + { + /* Pass it on */ + userrec* source = this->Instance->FindNick(prefix); + if (source) + Utils->DoOneToOne(prefix, "MOTD", params, params[0]); + } + } + return true; + } + + /** remote ADMIN. leet, huh? */ + bool Admin(const std::string &prefix, std::deque<std::string> ¶ms) + { + if (params.size() > 0) + { + if (this->Instance->MatchText(this->Instance->Config->ServerName, params[0])) + { + /* It's for our server */ + string_list results; + userrec* source = this->Instance->FindNick(prefix); + + if (source) + { + std::deque<std::string> par; + par.push_back(prefix); + par.push_back(""); + + par[1] = std::string("::")+Instance->Config->ServerName+" 256 "+source->nick+" :Administrative info for "+Instance->Config->ServerName; + Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server); + + par[1] = std::string("::")+Instance->Config->ServerName+" 257 "+source->nick+" :Name - "+Instance->Config->AdminName; + Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server); + + par[1] = std::string("::")+Instance->Config->ServerName+" 258 "+source->nick+" :Nickname - "+Instance->Config->AdminNick; + Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server); + + par[1] = std::string("::")+Instance->Config->ServerName+" 258 "+source->nick+" :E-Mail - "+Instance->Config->AdminEmail; + Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server); + } + } + else + { + /* Pass it on */ + userrec* source = this->Instance->FindNick(prefix); + if (source) + Utils->DoOneToOne(prefix, "ADMIN", params, params[0]); + } + } + return true; + } + + bool Stats(const std::string &prefix, std::deque<std::string> ¶ms) + { + /* Get the reply to a STATS query if it matches this servername, + * and send it back as a load of PUSH queries + */ + if (params.size() > 1) + { + if (this->Instance->MatchText(this->Instance->Config->ServerName, params[1])) + { + /* It's for our server */ + string_list results; + userrec* source = this->Instance->FindNick(prefix); + if (source) + { + std::deque<std::string> par; + par.push_back(prefix); + par.push_back(""); + DoStats(this->Instance, *(params[0].c_str()), source, results); + for (size_t i = 0; i < results.size(); i++) + { + par[1] = "::" + results[i]; + Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server); + } + } + } + else + { + /* Pass it on */ + userrec* source = this->Instance->FindNick(prefix); + if (source) + Utils->DoOneToOne(prefix, "STATS", params, params[1]); + } + } + return true; + } + + + /** Because the core won't let users or even SERVERS set +o, + * we use the OPERTYPE command to do this. + */ + bool OperType(const std::string &prefix, std::deque<std::string> ¶ms) + { + if (params.size() != 1) + return true; + std::string opertype = params[0]; + userrec* u = this->Instance->FindNick(prefix); + if (u) + { + u->modes[UM_OPERATOR] = 1; + this->Instance->all_opers.push_back(u); + strlcpy(u->oper,opertype.c_str(),NICKMAX-1); + Utils->DoOneToAllButSender(u->nick,"OPERTYPE",params,u->server); + this->Instance->SNO->WriteToSnoMask('o',"From %s: User %s (%s@%s) is now an IRC operator of type %s",u->server, u->nick,u->ident,u->host,irc::Spacify(opertype.c_str())); + + } + return true; + } + + /** Because Andy insists that services-compatible servers must + * implement SVSNICK and SVSJOIN, that's exactly what we do :p + */ + bool ForceNick(const std::string &prefix, std::deque<std::string> ¶ms) + { + if (params.size() < 3) + return true; + + userrec* u = this->Instance->FindNick(params[0]); + + if (u) + { + Utils->DoOneToAllButSender(prefix,"SVSNICK",params,prefix); + if (IS_LOCAL(u)) + { + std::deque<std::string> par; + par.push_back(params[1]); + /* This is not required as one is sent in OnUserPostNick below + */ + //Utils->DoOneToMany(u->nick,"NICK",par); + if (!u->ForceNickChange(params[1].c_str())) + { + userrec::QuitUser(this->Instance, u, "Nickname collision"); + return true; + } + u->age = atoi(params[2].c_str()); + } + } + return true; + } + + /* + * Remote SQUIT (RSQUIT). Routing works similar to SVSNICK: Route it to the server that the target is connected to locally, + * then let that server do the dirty work (squit it!). Example: + * A -> B -> C -> D: oper on A squits D, A routes to B, B routes to C, C notices D connected locally, kills it. -- w00t + */ + bool RemoteSquit(const std::string &prefix, std::deque<std::string> ¶ms) + { + /* ok.. :w00t RSQUIT jupe.barafranca.com :reason here */ + if (params.size() < 2) + return true; + + TreeServer* s = Utils->FindServerMask(params[0]); + + if (s) + { + if (s == Utils->TreeRoot) + { + this->Instance->SNO->WriteToSnoMask('l',"What the fuck, I recieved a remote SQUIT for myself? :< (from %s", prefix.c_str()); + return true; + } + + TreeSocket* sock = s->GetSocket(); + + if (sock) + { + /* it's locally connected, KILL IT! */ + Instance->SNO->WriteToSnoMask('l',"RSQUIT: Server \002%s\002 removed from network by %s: %s", params[0].c_str(), prefix.c_str(), params[1].c_str()); + sock->Squit(s,"Server quit by " + prefix + ": " + params[1]); + Instance->SE->DelFd(sock); + sock->Close(); + delete sock; + } + else + { + /* route the rsquit */ + params[1] = ":" + params[1]; + Utils->DoOneToOne(prefix, "RSQUIT", params, params[0]); + } + } + else + { + /* mother fucker! it doesn't exist */ + } + + return true; + } + + bool ServiceJoin(const std::string &prefix, std::deque<std::string> ¶ms) + { + if (params.size() < 2) + return true; + + userrec* u = this->Instance->FindNick(params[0]); + + if (u) + { + /* only join if it's local, otherwise just pass it on! */ + if (IS_LOCAL(u)) + chanrec::JoinUser(this->Instance, u, params[1].c_str(), false); + Utils->DoOneToAllButSender(prefix,"SVSJOIN",params,prefix); + } + return true; + } + + bool RemoteRehash(const std::string &prefix, std::deque<std::string> ¶ms) + { + if (params.size() < 1) + return false; + + std::string servermask = params[0]; + + if (this->Instance->MatchText(this->Instance->Config->ServerName,servermask)) + { + this->Instance->SNO->WriteToSnoMask('l',"Remote rehash initiated by \002"+prefix+"\002."); + this->Instance->RehashServer(); + Utils->ReadConfiguration(false); + InitializeDisabledCommands(Instance->Config->DisabledCommands, Instance); + } + Utils->DoOneToAllButSender(prefix,"REHASH",params,prefix); + return true; + } + + bool RemoteKill(const std::string &prefix, std::deque<std::string> ¶ms) + { + if (params.size() != 2) + return true; + + std::string nick = params[0]; + userrec* u = this->Instance->FindNick(prefix); + userrec* who = this->Instance->FindNick(nick); + + if (who) + { + /* Prepend kill source, if we don't have one */ + std::string sourceserv = prefix; + if (u) + { + sourceserv = u->server; + } + if (*(params[1].c_str()) != '[') + { + params[1] = "[" + sourceserv + "] Killed (" + params[1] +")"; + } + std::string reason = params[1]; + params[1] = ":" + params[1]; + Utils->DoOneToAllButSender(prefix,"KILL",params,sourceserv); + who->Write(":%s KILL %s :%s (%s)", sourceserv.c_str(), who->nick, sourceserv.c_str(), reason.c_str()); + userrec::QuitUser(this->Instance,who,reason); + } + return true; + } + + bool LocalPong(const std::string &prefix, std::deque<std::string> ¶ms) + { + if (params.size() < 1) + return true; + + if (params.size() == 1) + { + TreeServer* ServerSource = Utils->FindServer(prefix); + if (ServerSource) + { + ServerSource->SetPingFlag(); + } + } + else + { + std::string forwardto = params[1]; + if (forwardto == this->Instance->Config->ServerName) + { + /* + * this is a PONG for us + * if the prefix is a user, check theyre local, and if they are, + * dump the PONG reply back to their fd. If its a server, do nowt. + * Services might want to send these s->s, but we dont need to yet. + */ + userrec* u = this->Instance->FindNick(prefix); + + if (u) + { + u->WriteServ("PONG %s %s",params[0].c_str(),params[1].c_str()); + } + } + else + { + // not for us, pass it on :) + Utils->DoOneToOne(prefix,"PONG",params,forwardto); + } + } + + return true; + } + + bool MetaData(const std::string &prefix, std::deque<std::string> ¶ms) + { + if (params.size() < 3) + return true; + + TreeServer* ServerSource = Utils->FindServer(prefix); + + if (ServerSource) + { + if (params[0] == "*") + { + FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_OTHER,NULL,params[1],params[2])); + } + else if (*(params[0].c_str()) == '#') + { + chanrec* c = this->Instance->FindChan(params[0]); + if (c) + { + FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_CHANNEL,c,params[1],params[2])); + } + } + else if (*(params[0].c_str()) != '#') + { + userrec* u = this->Instance->FindNick(params[0]); + if (u) + { + FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_USER,u,params[1],params[2])); + } + } + } + + params[2] = ":" + params[2]; + Utils->DoOneToAllButSender(prefix,"METADATA",params,prefix); + return true; + } + + bool ServerVersion(const std::string &prefix, std::deque<std::string> ¶ms) + { + if (params.size() < 1) + return true; + + TreeServer* ServerSource = Utils->FindServer(prefix); + + if (ServerSource) + { + ServerSource->SetVersion(params[0]); + } + params[0] = ":" + params[0]; + Utils->DoOneToAllButSender(prefix,"VERSION",params,prefix); + return true; + } + + bool ChangeHost(const std::string &prefix, std::deque<std::string> ¶ms) + { + if (params.size() < 1) + return true; + + userrec* u = this->Instance->FindNick(prefix); + + if (u) + { + u->ChangeDisplayedHost(params[0].c_str()); + Utils->DoOneToAllButSender(prefix,"FHOST",params,u->server); + } + return true; + } + + bool AddLine(const std::string &prefix, std::deque<std::string> ¶ms) + { + if (params.size() < 6) + return true; + + bool propogate = false; + + if (!this->bursting) + Utils->lines_to_apply = 0; + + switch (*(params[0].c_str())) + { + case 'Z': + propogate = Instance->XLines->add_zline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str()); + Instance->XLines->zline_set_creation_time(params[1].c_str(), atoi(params[3].c_str())); + if (propogate) + Utils->lines_to_apply |= APPLY_ZLINES; + break; + case 'Q': + propogate = Instance->XLines->add_qline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str()); + Instance->XLines->qline_set_creation_time(params[1].c_str(), atoi(params[3].c_str())); + if (propogate) + Utils->lines_to_apply |= APPLY_QLINES; + break; + case 'E': + propogate = Instance->XLines->add_eline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str()); + Instance->XLines->eline_set_creation_time(params[1].c_str(), atoi(params[3].c_str())); + break; + case 'G': + propogate = Instance->XLines->add_gline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str()); + Instance->XLines->gline_set_creation_time(params[1].c_str(), atoi(params[3].c_str())); + if (propogate) + Utils->lines_to_apply |= APPLY_GLINES; + break; + case 'K': + propogate = Instance->XLines->add_kline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str()); + if (propogate) + Utils->lines_to_apply |= APPLY_KLINES; + break; + default: + /* Just in case... */ + this->Instance->SNO->WriteToSnoMask('x',"\2WARNING\2: Invalid xline type '"+params[0]+"' sent by server "+prefix+", ignored!"); + propogate = false; + break; + } + + /* Send it on its way */ + if (propogate) + { + if (atoi(params[4].c_str())) + { + this->Instance->SNO->WriteToSnoMask('x',"%s Added %cLINE on %s to expire in %lu seconds (%s).",prefix.c_str(),*(params[0].c_str()),params[1].c_str(),atoi(params[4].c_str()),params[5].c_str()); + } + else + { + this->Instance->SNO->WriteToSnoMask('x',"%s Added permenant %cLINE on %s (%s).",prefix.c_str(),*(params[0].c_str()),params[1].c_str(),params[5].c_str()); + } + params[5] = ":" + params[5]; + Utils->DoOneToAllButSender(prefix,"ADDLINE",params,prefix); + } + if (!this->bursting) + { + Instance->XLines->apply_lines(Utils->lines_to_apply); + Utils->lines_to_apply = 0; + } + return true; + } + + bool ChangeName(const std::string &prefix, std::deque<std::string> ¶ms) + { + if (params.size() < 1) + return true; + + userrec* u = this->Instance->FindNick(prefix); + + if (u) + { + u->ChangeName(params[0].c_str()); + params[0] = ":" + params[0]; + Utils->DoOneToAllButSender(prefix,"FNAME",params,u->server); + } + return true; + } + + bool Whois(const std::string &prefix, std::deque<std::string> ¶ms) + { + if (params.size() < 1) + return true; + + userrec* u = this->Instance->FindNick(prefix); + if (u) + { + // an incoming request + if (params.size() == 1) + { + userrec* x = this->Instance->FindNick(params[0]); + if ((x) && (IS_LOCAL(x))) + { + userrec* x = this->Instance->FindNick(params[0]); + char signon[MAXBUF]; + char idle[MAXBUF]; + + snprintf(signon,MAXBUF,"%lu",(unsigned long)x->signon); + snprintf(idle,MAXBUF,"%lu",(unsigned long)abs((x->idle_lastmsg)-Instance->Time(true))); + std::deque<std::string> par; + par.push_back(prefix); + par.push_back(signon); + par.push_back(idle); + // ours, we're done, pass it BACK + Utils->DoOneToOne(params[0],"IDLE",par,u->server); + } + else + { + // not ours pass it on + Utils->DoOneToOne(prefix,"IDLE",params,x->server); + } + } + else if (params.size() == 3) + { + std::string who_did_the_whois = params[0]; + userrec* who_to_send_to = this->Instance->FindNick(who_did_the_whois); + if ((who_to_send_to) && (IS_LOCAL(who_to_send_to))) + { + // an incoming reply to a whois we sent out + std::string nick_whoised = prefix; + unsigned long signon = atoi(params[1].c_str()); + unsigned long idle = atoi(params[2].c_str()); + if ((who_to_send_to) && (IS_LOCAL(who_to_send_to))) + do_whois(this->Instance,who_to_send_to,u,signon,idle,nick_whoised.c_str()); + } + else + { + // not ours, pass it on + Utils->DoOneToOne(prefix,"IDLE",params,who_to_send_to->server); + } + } + } + return true; + } + + bool Push(const std::string &prefix, std::deque<std::string> ¶ms) + { + if (params.size() < 2) + return true; + + userrec* u = this->Instance->FindNick(params[0]); + + if (!u) + return true; + + if (IS_LOCAL(u)) + { + u->Write(params[1]); + } + else + { + // continue the raw onwards + params[1] = ":" + params[1]; + Utils->DoOneToOne(prefix,"PUSH",params,u->server); + } + return true; + } + + bool HandleSetTime(const std::string &prefix, std::deque<std::string> ¶ms) + { + if (!params.size() || !Utils->EnableTimeSync) + return true; + + bool force = false; + + if ((params.size() == 2) && (params[1] == "FORCE")) + force = true; + + time_t rts = atoi(params[0].c_str()); + time_t us = Instance->Time(true); + + if (rts == us) + { + Utils->DoOneToAllButSender(prefix, "TIMESET", params, prefix); + } + else if (force || (rts < us)) + { + int old = Instance->SetTimeDelta(rts - us); + Instance->Log(DEBUG, "%s TS (diff %d) from %s applied (old delta was %d)", (force) ? "Forced" : "Lower", rts - us, prefix.c_str(), old); + + Utils->DoOneToAllButSender(prefix, "TIMESET", params, prefix); + } + else + { + Instance->Log(DEBUG, "Higher TS (diff %d) from %s overridden", us - rts, prefix.c_str()); + + std::deque<std::string> oparams; + oparams.push_back(ConvToStr(us)); + + Utils->DoOneToMany(prefix, "TIMESET", oparams); + } + + return true; + } + + bool Time(const std::string &prefix, std::deque<std::string> ¶ms) + { + // :source.server TIME remote.server sendernick + // :remote.server TIME source.server sendernick TS + if (params.size() == 2) + { + // someone querying our time? + if (this->Instance->Config->ServerName == params[0]) + { + userrec* u = this->Instance->FindNick(params[1]); + if (u) + { + params.push_back(ConvToStr(Instance->Time(false))); + params[0] = prefix; + Utils->DoOneToOne(this->Instance->Config->ServerName,"TIME",params,params[0]); + } + } + else + { + // not us, pass it on + userrec* u = this->Instance->FindNick(params[1]); + if (u) + Utils->DoOneToOne(prefix,"TIME",params,params[0]); + } + } + else if (params.size() == 3) + { + // a response to a previous TIME + userrec* u = this->Instance->FindNick(params[1]); + if ((u) && (IS_LOCAL(u))) + { + time_t rawtime = atol(params[2].c_str()); + struct tm * timeinfo; + timeinfo = localtime(&rawtime); + char tms[26]; + snprintf(tms,26,"%s",asctime(timeinfo)); + tms[24] = 0; + u->WriteServ("391 %s %s :%s",u->nick,prefix.c_str(),tms); + } + else + { + if (u) + Utils->DoOneToOne(prefix,"TIME",params,u->server); + } + } + return true; + } + + bool LocalPing(const std::string &prefix, std::deque<std::string> ¶ms) + { + if (params.size() < 1) + return true; + + if (params.size() == 1) + { + std::string stufftobounce = params[0]; + this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" PONG "+stufftobounce); + return true; + } + else + { + std::string forwardto = params[1]; + if (forwardto == this->Instance->Config->ServerName) + { + // this is a ping for us, send back PONG to the requesting server + params[1] = params[0]; + params[0] = forwardto; + Utils->DoOneToOne(forwardto,"PONG",params,params[1]); + } + else + { + // not for us, pass it on :) + Utils->DoOneToOne(prefix,"PING",params,forwardto); + } + return true; + } + } + + bool RemoveStatus(const std::string &prefix, std::deque<std::string> ¶ms) + { + if (params.size() < 1) + return true; + + chanrec* c = Instance->FindChan(params[0]); + + if (c) + { + irc::modestacker modestack(false); + CUList *ulist = c->GetUsers(); + const char* y[127]; + std::deque<std::string> stackresult; + std::string x; + + for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++) + { + std::string modesequence = Instance->Modes->ModeString(i->second, c); + if (modesequence.length()) + { + irc::spacesepstream sep(modesequence); + std::string modeletters = sep.GetToken(); + + while (!modeletters.empty()) + { + char mletter = *(modeletters.begin()); + modestack.Push(mletter,sep.GetToken()); + modeletters.erase(modeletters.begin()); + } + } + } + + while (modestack.GetStackedLine(stackresult)) + { + stackresult.push_front(ConvToStr(c->age)); + stackresult.push_front(c->name); + Utils->DoOneToMany(Instance->Config->ServerName, "FMODE", stackresult); + stackresult.erase(stackresult.begin() + 1); + for (size_t z = 0; z < stackresult.size(); z++) + { + y[z] = stackresult[z].c_str(); + } + userrec* n = new userrec(Instance); + n->SetFd(FD_MAGIC_NUMBER); + Instance->SendMode(y, stackresult.size(), n); + delete n; + } + } + return true; + } + + bool RemoteServer(const std::string &prefix, std::deque<std::string> ¶ms) + { + if (params.size() < 4) + return false; + + std::string servername = params[0]; + std::string password = params[1]; + // hopcount is not used for a remote server, we calculate this ourselves + std::string description = params[3]; + TreeServer* ParentOfThis = Utils->FindServer(prefix); + + if (!ParentOfThis) + { + this->WriteLine("ERROR :Protocol error - Introduced remote server from unknown server "+prefix); + return false; + } + TreeServer* CheckDupe = Utils->FindServer(servername); + if (CheckDupe) + { + this->WriteLine("ERROR :Server "+servername+" already exists!"); + this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+servername+"\2 denied, already exists"); + return false; + } + TreeServer* Node = new TreeServer(this->Utils,this->Instance,servername,description,ParentOfThis,NULL); + ParentOfThis->AddChild(Node); + params[3] = ":" + params[3]; + Utils->DoOneToAllButSender(prefix,"SERVER",params,prefix); + this->Instance->SNO->WriteToSnoMask('l',"Server \002"+prefix+"\002 introduced server \002"+servername+"\002 ("+description+")"); + return true; + } + + bool Outbound_Reply_Server(std::deque<std::string> ¶ms) + { + if (params.size() < 4) + return false; + + irc::string servername = params[0].c_str(); + std::string sname = params[0]; + std::string password = params[1]; + int hops = atoi(params[2].c_str()); + + if (hops) + { + this->WriteLine("ERROR :Server too far away for authentication"); + this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication"); + return false; + } + std::string description = params[3]; + for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++) + { + if ((x->Name == servername) && (x->RecvPass == password)) + { + TreeServer* CheckDupe = Utils->FindServer(sname); + if (CheckDupe) + { + this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!"); + this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName()); + return false; + } + // Begin the sync here. this kickstarts the + // other side, waiting in WAIT_AUTH_2 state, + // into starting their burst, as it shows + // that we're happy. + this->LinkState = CONNECTED; + // we should add the details of this server now + // to the servers tree, as a child of the root + // node. + TreeServer* Node = new TreeServer(this->Utils,this->Instance,sname,description,Utils->TreeRoot,this); + Utils->TreeRoot->AddChild(Node); + params[3] = ":" + params[3]; + Utils->DoOneToAllButSender(Utils->TreeRoot->GetName(),"SERVER",params,sname); + this->bursting = true; + this->DoBurst(Node); + return true; + } + } + this->WriteLine("ERROR :Invalid credentials"); + this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials"); + return false; + } + + bool Inbound_Server(std::deque<std::string> ¶ms) + { + if (params.size() < 4) + return false; + + irc::string servername = params[0].c_str(); + std::string sname = params[0]; + std::string password = params[1]; + int hops = atoi(params[2].c_str()); + + if (hops) + { + this->WriteLine("ERROR :Server too far away for authentication"); + this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication"); + return false; + } + std::string description = params[3]; + for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++) + { + if ((x->Name == servername) && (x->RecvPass == password)) + { + TreeServer* CheckDupe = Utils->FindServer(sname); + if (CheckDupe) + { + this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!"); + this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName()); + return false; + } + this->Instance->SNO->WriteToSnoMask('l',"Verified incoming server connection from \002"+sname+"\002["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] ("+description+")"); + + if (this->Hook) + { + std::string name = InspSocketNameRequest((Module*)Utils->Creator, this->Hook).Send(); + this->Instance->SNO->WriteToSnoMask('l',"Connection from \2"+sname+"\2["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] using transport \2"+name+"\2"); + } + + this->InboundServerName = sname; + this->InboundDescription = description; + // this is good. Send our details: Our server name and description and hopcount of 0, + // along with the sendpass from this block. + this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+x->SendPass+" 0 :"+this->Instance->Config->ServerDesc); + // move to the next state, we are now waiting for THEM. + this->LinkState = WAIT_AUTH_2; + return true; + } + } + this->WriteLine("ERROR :Invalid credentials"); + this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials"); + return false; + } + + void Split(const std::string &line, std::deque<std::string> &n) + { + n.clear(); + irc::tokenstream tokens(line); + std::string param; + while ((param = tokens.GetToken()) != "") + n.push_back(param); + return; + } + + bool ProcessLine(std::string &line) + { + std::deque<std::string> params; + irc::string command; + std::string prefix; + + line = line.substr(0, line.find_first_of("\r\n")); + + if (line.empty()) + return true; + + Instance->Log(DEBUG, "<- %s", line.c_str()); + + this->Split(line.c_str(),params); + + if ((params[0][0] == ':') && (params.size() > 1)) + { + prefix = params[0].substr(1); + params.pop_front(); + } + + command = params[0].c_str(); + params.pop_front(); + + switch (this->LinkState) + { + TreeServer* Node; + + case WAIT_AUTH_1: + // Waiting for SERVER command from remote server. Server initiating + // the connection sends the first SERVER command, listening server + // replies with theirs if its happy, then if the initiator is happy, + // it starts to send its net sync, which starts the merge, otherwise + // it sends an ERROR. + if (command == "PASS") + { + /* Silently ignored */ + } + else if (command == "SERVER") + { + return this->Inbound_Server(params); + } + else if (command == "ERROR") + { + return this->Error(params); + } + else if (command == "USER") + { + this->WriteLine("ERROR :Client connections to this port are prohibited."); + return false; + } + else if (command == "CAPAB") + { + return this->Capab(params); + } + else if ((command == "U") || (command == "S")) + { + this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!"); + return false; + } + else + { + std::string error("ERROR :Invalid command in negotiation phase: "); + error.append(command.c_str()); + this->WriteLine(error); + return false; + } + break; + case WAIT_AUTH_2: + // Waiting for start of other side's netmerge to say they liked our + // password. + if (command == "SERVER") + { + // cant do this, they sent it to us in the WAIT_AUTH_1 state! + // silently ignore. + return true; + } + else if ((command == "U") || (command == "S")) + { + this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!"); + return false; + } + else if (command == "BURST") + { + if (params.size() && Utils->EnableTimeSync) + { + /* If a time stamp is provided, apply synchronization */ + bool force = false; + time_t them = atoi(params[0].c_str()); + time_t us = Instance->Time(true); + int delta = them - us; + + if ((params.size() == 2) && (params[1] == "FORCE")) + force = true; + + if ((delta < -600) || (delta > 600)) + { + this->Instance->SNO->WriteToSnoMask('l',"\2ERROR\2: Your clocks are out by %d seconds (this is more than ten minutes). Link aborted, \2PLEASE SYNC YOUR CLOCKS!\2",abs(delta)); + this->WriteLine("ERROR :Your clocks are out by "+ConvToStr(abs(delta))+" seconds (this is more than ten minutes). Link aborted, PLEASE SYNC YOUR CLOCKS!"); + return false; + } + + if (force || (us > them)) + { + this->Instance->SetTimeDelta(them - us); + // Send this new timestamp to any other servers + Utils->DoOneToMany(Utils->TreeRoot->GetName(), "TIMESET", params); + } + else + { + // Override the timestamp + this->WriteLine(":" + Utils->TreeRoot->GetName() + " TIMESET " + ConvToStr(us)); + } + } + this->LinkState = CONNECTED; + Node = new TreeServer(this->Utils,this->Instance,InboundServerName,InboundDescription,Utils->TreeRoot,this); + Utils->TreeRoot->AddChild(Node); + params.clear(); + params.push_back(InboundServerName); + params.push_back("*"); + params.push_back("1"); + params.push_back(":"+InboundDescription); + Utils->DoOneToAllButSender(Utils->TreeRoot->GetName(),"SERVER",params,InboundServerName); + this->bursting = true; + this->DoBurst(Node); + } + else if (command == "ERROR") + { + return this->Error(params); + } + else if (command == "CAPAB") + { + return this->Capab(params); + } + + break; + case LISTENER: + this->WriteLine("ERROR :Internal error -- listening socket accepted its own descriptor!!!"); + return false; + break; + case CONNECTING: + if (command == "SERVER") + { + // another server we connected to, which was in WAIT_AUTH_1 state, + // has just sent us their credentials. If we get this far, theyre + // happy with OUR credentials, and they are now in WAIT_AUTH_2 state. + // if we're happy with this, we should send our netburst which + // kickstarts the merge. + return this->Outbound_Reply_Server(params); + } + else if (command == "ERROR") + { + return this->Error(params); + } + break; + case CONNECTED: + // This is the 'authenticated' state, when all passwords + // have been exchanged and anything past this point is taken + // as gospel. + + if (prefix != "") + { + std::string direction = prefix; + userrec* t = this->Instance->FindNick(prefix); + if (t) + { + direction = t->server; + } + TreeServer* route_back_again = Utils->BestRouteTo(direction); + if ((!route_back_again) || (route_back_again->GetSocket() != this)) + { + if (route_back_again) + Instance->Log(DEBUG,"Protocol violation: Fake direction in command '%s' from connection '%s'",line.c_str(),this->GetName().c_str()); + return true; + } + + /* Fix by brain: + * When there is activity on the socket, reset the ping counter so + * that we're not wasting bandwidth pinging an active server. + */ + route_back_again->SetNextPingTime(time(NULL) + 60); + route_back_again->SetPingFlag(); + } + + if (command == "SVSMODE") + { + /* Services expects us to implement + * SVSMODE. In inspircd its the same as + * MODE anyway. + */ + command = "MODE"; + } + std::string target = ""; + /* Yes, know, this is a mess. Its reasonably fast though as we're + * working with std::string here. + */ + if ((command == "NICK") && (params.size() > 1)) + { + return this->IntroduceClient(prefix,params); + } + else if (command == "FJOIN") + { + return this->ForceJoin(prefix,params); + } + else if (command == "STATS") + { + return this->Stats(prefix, params); + } + else if (command == "MOTD") + { + return this->Motd(prefix, params); + } + else if (command == "ADMIN") + { + return this->Admin(prefix, params); + } + else if (command == "SERVER") + { + return this->RemoteServer(prefix,params); + } + else if (command == "ERROR") + { + return this->Error(params); + } + else if (command == "OPERTYPE") + { + return this->OperType(prefix,params); + } + else if (command == "FMODE") + { + return this->ForceMode(prefix,params); + } + else if (command == "KILL") + { + return this->RemoteKill(prefix,params); + } + else if (command == "FTOPIC") + { + return this->ForceTopic(prefix,params); + } + else if (command == "REHASH") + { + return this->RemoteRehash(prefix,params); + } + else if (command == "METADATA") + { + return this->MetaData(prefix,params); + } + else if (command == "REMSTATUS") + { + return this->RemoveStatus(prefix,params); + } + else if (command == "PING") + { + /* + * We just got a ping from a server that's bursting. + * This can't be right, so set them to not bursting, and + * apply their lines. + */ + if (this->bursting) + { + this->bursting = false; + Instance->XLines->apply_lines(Utils->lines_to_apply); + Utils->lines_to_apply = 0; + } + if (prefix == "") + { + prefix = this->GetName(); + } + return this->LocalPing(prefix,params); + } + else if (command == "PONG") + { + /* + * We just got a pong from a server that's bursting. + * This can't be right, so set them to not bursting, and + * apply their lines. + */ + if (this->bursting) + { + this->bursting = false; + Instance->XLines->apply_lines(Utils->lines_to_apply); + Utils->lines_to_apply = 0; + } + if (prefix == "") + { + prefix = this->GetName(); + } + return this->LocalPong(prefix,params); + } + else if (command == "VERSION") + { + return this->ServerVersion(prefix,params); + } + else if (command == "FHOST") + { + return this->ChangeHost(prefix,params); + } + else if (command == "FNAME") + { + return this->ChangeName(prefix,params); + } + else if (command == "ADDLINE") + { + return this->AddLine(prefix,params); + } + else if (command == "SVSNICK") + { + if (prefix == "") + { + prefix = this->GetName(); + } + return this->ForceNick(prefix,params); + } + else if (command == "RSQUIT") + { + return this->RemoteSquit(prefix, params); + } + else if (command == "IDLE") + { + return this->Whois(prefix,params); + } + else if (command == "PUSH") + { + return this->Push(prefix,params); + } + else if (command == "TIMESET") + { + return this->HandleSetTime(prefix, params); + } + else if (command == "TIME") + { + return this->Time(prefix,params); + } + else if ((command == "KICK") && (Utils->IsServer(prefix))) + { + std::string sourceserv = this->myhost; + if (params.size() == 3) + { + userrec* user = this->Instance->FindNick(params[1]); + chanrec* chan = this->Instance->FindChan(params[0]); + if (user && chan) + { + if (!chan->ServerKickUser(user, params[2].c_str(), false)) + /* Yikes, the channels gone! */ + delete chan; + } + } + if (this->InboundServerName != "") + { + sourceserv = this->InboundServerName; + } + return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params); + } + else if (command == "SVSJOIN") + { + if (prefix == "") + { + prefix = this->GetName(); + } + return this->ServiceJoin(prefix,params); + } + else if (command == "SQUIT") + { + if (params.size() == 2) + { + this->Squit(Utils->FindServer(params[0]),params[1]); + } + return true; + } + else if (command == "OPERNOTICE") + { + std::string sourceserv = this->myhost; + + if (this->InboundServerName != "") + sourceserv = this->InboundServerName; + + if (params.size() >= 1) + Instance->WriteOpers("*** From " + sourceserv + ": " + params[0]); + + return Utils->DoOneToAllButSenderRaw(line, sourceserv, prefix, command, params); + } + else if (command == "MODENOTICE") + { + std::string sourceserv = this->myhost; + if (this->InboundServerName != "") + sourceserv = this->InboundServerName; + if (params.size() >= 2) + { + Instance->WriteMode(params[0].c_str(), WM_AND, "*** From %s: %s", sourceserv.c_str(), params[1].c_str()); + } + + return Utils->DoOneToAllButSenderRaw(line, sourceserv, prefix, command, params); + } + else if (command == "SNONOTICE") + { + std::string sourceserv = this->myhost; + if (this->InboundServerName != "") + sourceserv = this->InboundServerName; + if (params.size() >= 2) + { + Instance->SNO->WriteToSnoMask(*(params[0].c_str()), "From " + sourceserv + ": "+ params[1]); + } + + return Utils->DoOneToAllButSenderRaw(line, sourceserv, prefix, command, params); + } + else if (command == "ENDBURST") + { + this->bursting = false; + Instance->XLines->apply_lines(Utils->lines_to_apply); + Utils->lines_to_apply = 0; + std::string sourceserv = this->myhost; + if (this->InboundServerName != "") + { + sourceserv = this->InboundServerName; + } + this->Instance->SNO->WriteToSnoMask('l',"Received end of netburst from \2%s\2",sourceserv.c_str()); + + Event rmode((char*)sourceserv.c_str(), (Module*)Utils->Creator, "new_server"); + rmode.Send(Instance); + + return true; + } + else + { + // not a special inter-server command. + // Emulate the actual user doing the command, + // this saves us having a huge ugly parser. + userrec* who = this->Instance->FindNick(prefix); + std::string sourceserv = this->myhost; + if (this->InboundServerName != "") + { + sourceserv = this->InboundServerName; + } + if ((!who) && (command == "MODE")) + { + if (Utils->IsServer(prefix)) + { + const char* modelist[127]; + for (size_t i = 0; i < params.size(); i++) + modelist[i] = params[i].c_str(); + + userrec* fake = new userrec(Instance); + fake->SetFd(FD_MAGIC_NUMBER); + + this->Instance->SendMode(modelist, params.size(), fake); + + delete fake; + + /* Hot potato! pass it on! */ + return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params); + } + } + if (who) + { + if ((command == "NICK") && (params.size() > 0)) + { + /* On nick messages, check that the nick doesnt + * already exist here. If it does, kill their copy, + * and our copy. + */ + userrec* x = this->Instance->FindNick(params[0]); + if ((x) && (x != who)) + { + std::deque<std::string> p; + p.push_back(params[0]); + p.push_back("Nickname collision ("+prefix+" -> "+params[0]+")"); + Utils->DoOneToMany(this->Instance->Config->ServerName,"KILL",p); + p.clear(); + p.push_back(prefix); + p.push_back("Nickname collision"); + Utils->DoOneToMany(this->Instance->Config->ServerName,"KILL",p); + userrec::QuitUser(this->Instance,x,"Nickname collision ("+prefix+" -> "+params[0]+")"); + userrec* y = this->Instance->FindNick(prefix); + if (y) + { + userrec::QuitUser(this->Instance,y,"Nickname collision"); + } + return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params); + } + } + // its a user + target = who->server; + const char* strparams[127]; + for (unsigned int q = 0; q < params.size(); q++) + { + strparams[q] = params[q].c_str(); + } + switch (this->Instance->CallCommandHandler(command.c_str(), strparams, params.size(), who)) + { + case CMD_INVALID: + this->WriteLine("ERROR :Unrecognised command '"+std::string(command.c_str())+"' -- possibly loaded mismatched modules"); + return false; + break; + case CMD_FAILURE: + return true; + break; + default: + /* CMD_SUCCESS and CMD_USER_DELETED fall through here */ + break; + } + } + else + { + // its not a user. Its either a server, or somethings screwed up. + if (Utils->IsServer(prefix)) + target = this->Instance->Config->ServerName; + else + return true; + } + return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params); + + } + return true; + break; + } + return true; + } + + virtual std::string GetName() + { + std::string sourceserv = this->myhost; + if (this->InboundServerName != "") + { + sourceserv = this->InboundServerName; + } + return sourceserv; + } + + virtual void OnTimeout() + { + if (this->LinkState == CONNECTING) + { + this->Instance->SNO->WriteToSnoMask('l',"CONNECT: Connection to \002"+myhost+"\002 timed out."); + Link* MyLink = Utils->FindLink(myhost); + if (MyLink) + Utils->DoFailOver(MyLink); + } + } + + virtual void OnClose() + { + // Connection closed. + // If the connection is fully up (state CONNECTED) + // then propogate a netsplit to all peers. + std::string quitserver = this->myhost; + if (this->InboundServerName != "") + { + quitserver = this->InboundServerName; + } + TreeServer* s = Utils->FindServer(quitserver); + if (s) + { + Squit(s,"Remote host closed the connection"); + } + + if (quitserver != "") + this->Instance->SNO->WriteToSnoMask('l',"Connection to '\2%s\2' failed.",quitserver.c_str()); + } + + virtual int OnIncomingConnection(int newsock, char* ip) + { + /* To prevent anyone from attempting to flood opers/DDoS by connecting to the server port, + * or discovering if this port is the server port, we don't allow connections from any + * IPs for which we don't have a link block. + */ + bool found = false; + + found = (std::find(Utils->ValidIPs.begin(), Utils->ValidIPs.end(), ip) != Utils->ValidIPs.end()); + if (!found) + { + for (vector<std::string>::iterator i = Utils->ValidIPs.begin(); i != Utils->ValidIPs.end(); i++) + if (irc::sockets::MatchCIDR(ip, (*i).c_str())) + found = true; + + if (!found) + { + this->Instance->SNO->WriteToSnoMask('l',"Server connection from %s denied (no link blocks with that IP address)", ip); + close(newsock); + return false; + } + } + + TreeSocket* s = new TreeSocket(this->Utils, this->Instance, newsock, ip, this->Hook); + + s = s; /* Whinge whinge whinge, thats all GCC ever does. */ + return true; + } +}; + +/** This class is used to resolve server hostnames during /connect and autoconnect. + * As of 1.1, the resolver system is seperated out from InspSocket, so we must do this + * resolver step first ourselves if we need it. This is totally nonblocking, and will + * callback to OnLookupComplete or OnError when completed. Once it has completed we + * will have an IP address which we can then use to continue our connection. + */ +class ServernameResolver : public Resolver +{ + private: + /** A copy of the Link tag info for what we're connecting to. + * We take a copy, rather than using a pointer, just in case the + * admin takes the tag away and rehashes while the domain is resolving. + */ + Link MyLink; + SpanningTreeUtilities* Utils; + public: + ServernameResolver(Module* me, SpanningTreeUtilities* Util, InspIRCd* Instance, const std::string &hostname, Link x, bool &cached) : Resolver(Instance, hostname, DNS_QUERY_FORWARD, cached, me), MyLink(x), Utils(Util) + { + /* Nothing in here, folks */ + } + + void OnLookupComplete(const std::string &result, unsigned int ttl, bool cached) + { + /* Initiate the connection, now that we have an IP to use. + * Passing a hostname directly to InspSocket causes it to + * just bail and set its FD to -1. + */ + TreeServer* CheckDupe = Utils->FindServer(MyLink.Name.c_str()); + if (!CheckDupe) /* Check that nobody tried to connect it successfully while we were resolving */ + { + + if ((!MyLink.Hook.empty()) && (Utils->hooks.find(MyLink.Hook.c_str()) == Utils->hooks.end())) + return; + + TreeSocket* newsocket = new TreeSocket(this->Utils, ServerInstance, result,MyLink.Port,false,MyLink.Timeout ? MyLink.Timeout : 10,MyLink.Name.c_str(), + MyLink.Hook.empty() ? NULL : Utils->hooks[MyLink.Hook.c_str()]); + if (newsocket->GetFd() > -1) + { + /* We're all OK */ + } + else + { + /* Something barfed, show the opers */ + ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: %s.",MyLink.Name.c_str(),strerror(errno)); + delete newsocket; + Utils->DoFailOver(&MyLink); + } + } + } + + void OnError(ResolverError e, const std::string &errormessage) + { + /* Ooops! */ + ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: Unable to resolve hostname - %s",MyLink.Name.c_str(),errormessage.c_str()); + Utils->DoFailOver(&MyLink); + } +}; + +/** Handle resolving of server IPs for the cache + */ +class SecurityIPResolver : public Resolver +{ + private: + Link MyLink; + SpanningTreeUtilities* Utils; + public: + SecurityIPResolver(Module* me, SpanningTreeUtilities* U, InspIRCd* Instance, const std::string &hostname, Link x, bool &cached) : Resolver(Instance, hostname, DNS_QUERY_FORWARD, cached, me), MyLink(x), Utils(U) + { + } + + void OnLookupComplete(const std::string &result, unsigned int ttl, bool cached) + { + Utils->ValidIPs.push_back(result); + } + + void OnError(ResolverError e, const std::string &errormessage) + { + ServerInstance->Log(DEFAULT,"Could not resolve IP associated with Link '%s': %s",MyLink.Name.c_str(),errormessage.c_str()); + } +}; + +SpanningTreeUtilities::SpanningTreeUtilities(InspIRCd* Instance, ModuleSpanningTree* C) : ServerInstance(Instance), Creator(C) +{ + Bindings.clear(); + + lines_to_apply = 0; + + this->TreeRoot = new TreeServer(this, ServerInstance, ServerInstance->Config->ServerName, ServerInstance->Config->ServerDesc); + + modulelist* ml = ServerInstance->FindInterface("InspSocketHook"); + + /* Did we find any modules? */ + if (ml) + { + /* Yes, enumerate them all to find out the hook name */ + for (modulelist::iterator m = ml->begin(); m != ml->end(); m++) + { + /* Make a request to it for its name, its implementing + * InspSocketHook so we know its safe to do this + */ + std::string name = InspSocketNameRequest((Module*)Creator, *m).Send(); + /* Build a map of them */ + hooks[name.c_str()] = *m; + hooknames.push_back(name); + } + } + + this->ReadConfiguration(true); +} + +SpanningTreeUtilities::~SpanningTreeUtilities() +{ + for (unsigned int i = 0; i < Bindings.size(); i++) + { + ServerInstance->SE->DelFd(Bindings[i]); + Bindings[i]->Close(); + DELETE(Bindings[i]); + } + while (TreeRoot->ChildCount()) + { + TreeServer* child_server = TreeRoot->GetChild(0); + if (child_server) + { + TreeSocket* sock = child_server->GetSocket(); + ServerInstance->SE->DelFd(sock); + sock->Close(); + DELETE(sock); + } + } + delete TreeRoot; +} + +void SpanningTreeUtilities::AddThisServer(TreeServer* server, TreeServerList &list) +{ + if (list.find(server) == list.end()) + list[server] = server; +} + +/** returns a list of DIRECT servernames for a specific channel */ +void SpanningTreeUtilities::GetListOfServersForChannel(chanrec* c, TreeServerList &list, char status, const CUList &exempt_list) +{ + CUList *ulist; + switch (status) + { + case '@': + ulist = c->GetOppedUsers(); + break; + case '%': + ulist = c->GetHalfoppedUsers(); + break; + case '+': + ulist = c->GetVoicedUsers(); + break; + default: + ulist = c->GetUsers(); + break; + } + for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++) + { + if ((i->second->GetFd() < 0) && (exempt_list.find(i->second) == exempt_list.end())) + { + TreeServer* best = this->BestRouteTo(i->second->server); + if (best) + AddThisServer(best,list); + } + } + return; +} + +bool SpanningTreeUtilities::DoOneToAllButSenderRaw(const std::string &data, const std::string &omit, const std::string &prefix, const irc::string &command, std::deque<std::string> ¶ms) +{ + char pfx = 0; + TreeServer* omitroute = this->BestRouteTo(omit); + if ((command == "NOTICE") || (command == "PRIVMSG")) + { + if (params.size() >= 2) + { + /* Prefixes */ + if ((*(params[0].c_str()) == '@') || (*(params[0].c_str()) == '%') || (*(params[0].c_str()) == '+')) + { + pfx = params[0][0]; + params[0] = params[0].substr(1, params[0].length()-1); + } + if ((*(params[0].c_str()) != '#') && (*(params[0].c_str()) != '$')) + { + // special routing for private messages/notices + userrec* d = ServerInstance->FindNick(params[0]); + if (d) + { + std::deque<std::string> par; + par.push_back(params[0]); + par.push_back(":"+params[1]); + this->DoOneToOne(prefix,command.c_str(),par,d->server); + return true; + } + } + else if (*(params[0].c_str()) == '$') + { + std::deque<std::string> par; + par.push_back(params[0]); + par.push_back(":"+params[1]); + this->DoOneToAllButSender(prefix,command.c_str(),par,omitroute->GetName()); + return true; + } + else + { + chanrec* c = ServerInstance->FindChan(params[0]); + userrec* u = ServerInstance->FindNick(prefix); + if (c && u) + { + CUList elist; + TreeServerList list; + FOREACH_MOD(I_OnBuildExemptList, OnBuildExemptList((command == "PRIVMSG" ? MSG_PRIVMSG : MSG_NOTICE), c, u, pfx, elist)); + GetListOfServersForChannel(c,list,pfx,elist); + + for (TreeServerList::iterator i = list.begin(); i != list.end(); i++) + { + TreeSocket* Sock = i->second->GetSocket(); + if ((Sock) && (i->second->GetName() != omit) && (omitroute != i->second)) + { + Sock->WriteLine(data); + } + } + return true; + } + } + } + } + unsigned int items =this->TreeRoot->ChildCount(); + for (unsigned int x = 0; x < items; x++) + { + TreeServer* Route = this->TreeRoot->GetChild(x); + if ((Route) && (Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route)) + { + TreeSocket* Sock = Route->GetSocket(); + if (Sock) + Sock->WriteLine(data); + } + } + return true; +} + +bool SpanningTreeUtilities::DoOneToAllButSender(const std::string &prefix, const std::string &command, std::deque<std::string> ¶ms, std::string omit) +{ + TreeServer* omitroute = this->BestRouteTo(omit); + std::string FullLine = ":" + prefix + " " + command; + unsigned int words = params.size(); + for (unsigned int x = 0; x < words; x++) + { + FullLine = FullLine + " " + params[x]; + } + unsigned int items = this->TreeRoot->ChildCount(); + for (unsigned int x = 0; x < items; x++) + { + TreeServer* Route = this->TreeRoot->GetChild(x); + // Send the line IF: + // The route has a socket (its a direct connection) + // The route isnt the one to be omitted + // The route isnt the path to the one to be omitted + if ((Route) && (Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route)) + { + TreeSocket* Sock = Route->GetSocket(); + if (Sock) + Sock->WriteLine(FullLine); + } + } + return true; +} + +bool SpanningTreeUtilities::DoOneToMany(const std::string &prefix, const std::string &command, std::deque<std::string> ¶ms) +{ + std::string FullLine = ":" + prefix + " " + command; + unsigned int words = params.size(); + for (unsigned int x = 0; x < words; x++) + { + FullLine = FullLine + " " + params[x]; + } + unsigned int items = this->TreeRoot->ChildCount(); + for (unsigned int x = 0; x < items; x++) + { + TreeServer* Route = this->TreeRoot->GetChild(x); + if (Route && Route->GetSocket()) + { + TreeSocket* Sock = Route->GetSocket(); + if (Sock) + Sock->WriteLine(FullLine); + } + } + return true; +} + +bool SpanningTreeUtilities::DoOneToMany(const char* prefix, const char* command, std::deque<std::string> ¶ms) +{ + std::string spfx = prefix; + std::string scmd = command; + return this->DoOneToMany(spfx, scmd, params); +} + +bool SpanningTreeUtilities::DoOneToAllButSender(const char* prefix, const char* command, std::deque<std::string> ¶ms, std::string omit) +{ + std::string spfx = prefix; + std::string scmd = command; + return this->DoOneToAllButSender(spfx, scmd, params, omit); +} + +bool SpanningTreeUtilities::DoOneToOne(const std::string &prefix, const std::string &command, std::deque<std::string> ¶ms, std::string target) +{ + TreeServer* Route = this->BestRouteTo(target); + if (Route) + { + std::string FullLine = ":" + prefix + " " + command; + unsigned int words = params.size(); + for (unsigned int x = 0; x < words; x++) + { + FullLine = FullLine + " " + params[x]; + } + if (Route && Route->GetSocket()) + { + TreeSocket* Sock = Route->GetSocket(); + if (Sock) + Sock->WriteLine(FullLine); + } + return true; + } + else + { + return false; + } +} + +void SpanningTreeUtilities::ReadConfiguration(bool rebind) +{ + ConfigReader* Conf = new ConfigReader(ServerInstance); + if (rebind) + { + for (int j =0; j < Conf->Enumerate("bind"); j++) + { + std::string Type = Conf->ReadValue("bind","type",j); + std::string IP = Conf->ReadValue("bind","address",j); + std::string Port = Conf->ReadValue("bind","port",j); + std::string transport = Conf->ReadValue("bind","transport",j); + if (Type == "servers") + { + irc::portparser portrange(Port, false); + int portno = -1; + while ((portno = portrange.GetToken())) + { + if (IP == "*") + IP = ""; + + if ((!transport.empty()) && (hooks.find(transport.c_str()) == hooks.end())) + { + ServerInstance->Log(DEFAULT,"m_spanningtree: WARNING: Can't find transport type '%s' for port %s:%s - maybe you forgot to load it BEFORE m_spanningtree in your config file? - Skipping this port binding", + transport.c_str(), IP.c_str(), Port.c_str()); + break; + } + + TreeSocket* listener = new TreeSocket(this, ServerInstance, IP.c_str(), portno, true, 10, transport.empty() ? NULL : hooks[transport.c_str()]); + if (listener->GetState() == I_LISTENING) + { + ServerInstance->Log(DEFAULT,"m_spanningtree: Binding server port %s:%d successful!", IP.c_str(), portno); + Bindings.push_back(listener); + } + else + { + ServerInstance->Log(DEFAULT,"m_spanningtree: Warning: Failed to bind server port %s:%d",IP.c_str(), portno); + listener->Close(); + DELETE(listener); + } + } + } + } + } + FlatLinks = Conf->ReadFlag("options","flatlinks",0); + HideULines = Conf->ReadFlag("options","hideulines",0); + AnnounceTSChange = Conf->ReadFlag("options","announcets",0); + EnableTimeSync = !(Conf->ReadFlag("options","notimesync",0)); + LinkBlocks.clear(); + ValidIPs.clear(); + for (int j =0; j < Conf->Enumerate("link"); j++) + { + Link L; + std::string Allow = Conf->ReadValue("link","allowmask",j); + L.Name = (Conf->ReadValue("link","name",j)).c_str(); + L.IPAddr = Conf->ReadValue("link","ipaddr",j); + L.FailOver = Conf->ReadValue("link","failover",j).c_str(); + L.Port = Conf->ReadInteger("link","port",j,true); + L.SendPass = Conf->ReadValue("link","sendpass",j); + L.RecvPass = Conf->ReadValue("link","recvpass",j); + L.AutoConnect = Conf->ReadInteger("link","autoconnect",j,true); + L.HiddenFromStats = Conf->ReadFlag("link","hidden",j); + L.Timeout = Conf->ReadInteger("link","timeout",j,true); + L.Hook = Conf->ReadValue("link", "transport", j); + + if ((!L.Hook.empty()) && (hooks.find(L.Hook.c_str()) == hooks.end())) + { + ServerInstance->Log(DEFAULT,"m_spanningtree: WARNING: Can't find transport type '%s' for link '%s' - maybe you forgot to load it BEFORE m_spanningtree in your config file? Skipping <link> tag completely.", + L.Hook.c_str(), L.Name.c_str()); + continue; + + } + + L.NextConnectTime = time(NULL) + L.AutoConnect; + /* Bugfix by brain, do not allow people to enter bad configurations */ + if (L.Name != ServerInstance->Config->ServerName) + { + if ((L.IPAddr != "") && (L.RecvPass != "") && (L.SendPass != "") && (L.Name != "") && (L.Port)) + { + ValidIPs.push_back(L.IPAddr); + + if (Allow.length()) + ValidIPs.push_back(Allow); + + /* Needs resolving */ + insp_inaddr binip; + if (insp_aton(L.IPAddr.c_str(), &binip) < 1) + { + try + { + bool cached; + SecurityIPResolver* sr = new SecurityIPResolver((Module*)this->Creator, this, ServerInstance, L.IPAddr, L, cached); + ServerInstance->AddResolver(sr, cached); + } + catch (ModuleException& e) + { + } + } + + LinkBlocks.push_back(L); + } + else + { + if (L.IPAddr == "") + { + ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', IP address not defined!",L.Name.c_str()); + } + else if (L.RecvPass == "") + { + ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', recvpass not defined!",L.Name.c_str()); + } + else if (L.SendPass == "") + { + ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', sendpass not defined!",L.Name.c_str()); + } + else if (L.Name == "") + { + ServerInstance->Log(DEFAULT,"Invalid configuration, link tag without a name!"); + } + else if (!L.Port) + { + ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', no port specified!",L.Name.c_str()); + } + } + } + else + { + ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', link tag has the same server name as the local server!",L.Name.c_str()); + } + } + DELETE(Conf); +} + +/** To create a timer which recurs every second, we inherit from InspTimer. + * InspTimer is only one-shot however, so at the end of each Tick() we simply + * insert another of ourselves into the pending queue :) + */ +class TimeSyncTimer : public InspTimer +{ + private: + InspIRCd *Instance; + ModuleSpanningTree *Module; + public: + TimeSyncTimer(InspIRCd *Instance, ModuleSpanningTree *Mod); + virtual void Tick(time_t TIME); +}; + +HandshakeTimer::HandshakeTimer(InspIRCd* Inst, TreeSocket* s, Link* l, SpanningTreeUtilities* u) : InspTimer(1, time(NULL)), Instance(Inst), sock(s), lnk(l), Utils(u) +{ + thefd = sock->GetFd(); +} + +void HandshakeTimer::Tick(time_t TIME) +{ + if (Instance->SE->GetRef(thefd) == sock) + { + if (sock->GetHook() && InspSocketHSCompleteRequest(sock, (Module*)Utils->Creator, sock->GetHook()).Send()) + { + InspSocketAttachCertRequest(sock, (Module*)Utils->Creator, sock->GetHook()).Send(); + sock->SendCapabilities(); + if (sock->GetLinkState() == CONNECTING) + { + sock->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+lnk->SendPass+" 0 :"+this->Instance->Config->ServerDesc); + } + } + else + { + Instance->Timers->AddTimer(new HandshakeTimer(Instance, sock, lnk, Utils)); + } + } +} + +class ModuleSpanningTree : public Module +{ + int line; + int NumServers; + unsigned int max_local; + unsigned int max_global; + cmd_rconnect* command_rconnect; + SpanningTreeUtilities* Utils; + + public: + TimeSyncTimer *SyncTimer; + + ModuleSpanningTree(InspIRCd* Me) + : Module::Module(Me), max_local(0), max_global(0) + { + ServerInstance->UseInterface("InspSocketHook"); + + Utils = new SpanningTreeUtilities(Me, this); + + command_rconnect = new cmd_rconnect(ServerInstance, this, Utils); + ServerInstance->AddCommand(command_rconnect); + + if (Utils->EnableTimeSync) + { + SyncTimer = new TimeSyncTimer(ServerInstance, this); + ServerInstance->Timers->AddTimer(SyncTimer); + } + else + SyncTimer = NULL; + } + + void ShowLinks(TreeServer* Current, userrec* user, int hops) + { + std::string Parent = Utils->TreeRoot->GetName(); + if (Current->GetParent()) + { + Parent = Current->GetParent()->GetName(); + } + for (unsigned int q = 0; q < Current->ChildCount(); q++) + { + if ((Utils->HideULines) && (ServerInstance->ULine(Current->GetChild(q)->GetName().c_str()))) + { + if (*user->oper) + { + ShowLinks(Current->GetChild(q),user,hops+1); + } + } + else + { + ShowLinks(Current->GetChild(q),user,hops+1); + } + } + /* Don't display the line if its a uline, hide ulines is on, and the user isnt an oper */ + if ((Utils->HideULines) && (ServerInstance->ULine(Current->GetName().c_str())) && (!*user->oper)) + return; + user->WriteServ("364 %s %s %s :%d %s",user->nick,Current->GetName().c_str(),(Utils->FlatLinks && (!*user->oper)) ? ServerInstance->Config->ServerName : Parent.c_str(),(Utils->FlatLinks && (!*user->oper)) ? 0 : hops,Current->GetDesc().c_str()); + } + + int CountLocalServs() + { + return Utils->TreeRoot->ChildCount(); + } + + int CountServs() + { + return Utils->serverlist.size(); + } + + void HandleLinks(const char** parameters, int pcnt, userrec* user) + { + ShowLinks(Utils->TreeRoot,user,0); + user->WriteServ("365 %s * :End of /LINKS list.",user->nick); + return; + } + + void HandleLusers(const char** parameters, int pcnt, userrec* user) + { + unsigned int n_users = ServerInstance->UserCount(); + + /* Only update these when someone wants to see them, more efficient */ + if ((unsigned int)ServerInstance->LocalUserCount() > max_local) + max_local = ServerInstance->LocalUserCount(); + if (n_users > max_global) + max_global = n_users; + + unsigned int ulined_count = 0; + unsigned int ulined_local_count = 0; + + /* If ulined are hidden and we're not an oper, count the number of ulined servers hidden, + * locally and globally (locally means directly connected to us) + */ + if ((Utils->HideULines) && (!*user->oper)) + { + for (server_hash::iterator q = Utils->serverlist.begin(); q != Utils->serverlist.end(); q++) + { + if (ServerInstance->ULine(q->second->GetName().c_str())) + { + ulined_count++; + if (q->second->GetParent() == Utils->TreeRoot) + ulined_local_count++; + } + } + } + + user->WriteServ("251 %s :There are %d users and %d invisible on %d servers",user->nick,n_users-ServerInstance->InvisibleUserCount(),ServerInstance->InvisibleUserCount(),ulined_count ? this->CountServs() - ulined_count : this->CountServs()); + if (ServerInstance->OperCount()) + user->WriteServ("252 %s %d :operator(s) online",user->nick,ServerInstance->OperCount()); + if (ServerInstance->UnregisteredUserCount()) + user->WriteServ("253 %s %d :unknown connections",user->nick,ServerInstance->UnregisteredUserCount()); + if (ServerInstance->ChannelCount()) + user->WriteServ("254 %s %d :channels formed",user->nick,ServerInstance->ChannelCount()); + user->WriteServ("254 %s :I have %d clients and %d servers",user->nick,ServerInstance->LocalUserCount(),ulined_local_count ? this->CountLocalServs() - ulined_local_count : this->CountLocalServs()); + user->WriteServ("265 %s :Current Local Users: %d Max: %d",user->nick,ServerInstance->LocalUserCount(),max_local); + user->WriteServ("266 %s :Current Global Users: %d Max: %d",user->nick,n_users,max_global); + return; + } + + // WARNING: NOT THREAD SAFE - DONT GET ANY SMART IDEAS. + + void ShowMap(TreeServer* Current, userrec* user, int depth, char matrix[128][80], float &totusers, float &totservers) + { + if (line < 128) + { + for (int t = 0; t < depth; t++) + { + matrix[line][t] = ' '; + } + + // For Aligning, we need to work out exactly how deep this thing is, and produce + // a 'Spacer' String to compensate. + char spacer[40]; + + memset(spacer,' ',40); + if ((40 - Current->GetName().length() - depth) > 1) { + spacer[40 - Current->GetName().length() - depth] = '\0'; + } + else + { + spacer[5] = '\0'; + } + + float percent; + char text[80]; + if (ServerInstance->clientlist->size() == 0) { + // If there are no users, WHO THE HELL DID THE /MAP?!?!?! + percent = 0; + } + else + { + percent = ((float)Current->GetUserCount() / (float)ServerInstance->clientlist->size()) * 100; + } + snprintf(text, 80, "%s %s%5d [%5.2f%%]", Current->GetName().c_str(), spacer, Current->GetUserCount(), percent); + totusers += Current->GetUserCount(); + totservers++; + strlcpy(&matrix[line][depth],text,80); + line++; + for (unsigned int q = 0; q < Current->ChildCount(); q++) + { + if ((Utils->HideULines) && (ServerInstance->ULine(Current->GetChild(q)->GetName().c_str()))) + { + if (*user->oper) + { + ShowMap(Current->GetChild(q),user,(Utils->FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers); + } + } + else + { + ShowMap(Current->GetChild(q),user,(Utils->FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers); + } + } + } + } + + int HandleMotd(const char** parameters, int pcnt, userrec* user) + { + if (pcnt > 0) + { + /* Remote MOTD, the server is within the 1st parameter */ + std::deque<std::string> params; + params.push_back(parameters[0]); + + /* Send it out remotely, generate no reply yet */ + TreeServer* s = Utils->FindServerMask(parameters[0]); + if (s) + { + Utils->DoOneToOne(user->nick, "MOTD", params, s->GetName()); + } + else + { + user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]); + } + return 1; + } + return 0; + } + + int HandleAdmin(const char** parameters, int pcnt, userrec* user) + { + if (pcnt > 0) + { + /* Remote ADMIN, the server is within the 1st parameter */ + std::deque<std::string> params; + params.push_back(parameters[0]); + + /* Send it out remotely, generate no reply yet */ + TreeServer* s = Utils->FindServerMask(parameters[0]); + if (s) + { + Utils->DoOneToOne(user->nick, "ADMIN", params, s->GetName()); + } + else + { + user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]); + } + return 1; + } + return 0; + } + + int HandleStats(const char** parameters, int pcnt, userrec* user) + { + if (pcnt > 1) + { + /* Remote STATS, the server is within the 2nd parameter */ + std::deque<std::string> params; + params.push_back(parameters[0]); + params.push_back(parameters[1]); + /* Send it out remotely, generate no reply yet */ + TreeServer* s = Utils->FindServerMask(parameters[1]); + if (s) + { + params[1] = s->GetName(); + Utils->DoOneToOne(user->nick, "STATS", params, s->GetName()); + } + else + { + user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]); + } + return 1; + } + return 0; + } + + // Ok, prepare to be confused. + // After much mulling over how to approach this, it struck me that + // the 'usual' way of doing a /MAP isnt the best way. Instead of + // keeping track of a ton of ascii characters, and line by line + // under recursion working out where to place them using multiplications + // and divisons, we instead render the map onto a backplane of characters + // (a character matrix), then draw the branches as a series of "L" shapes + // from the nodes. This is not only friendlier on CPU it uses less stack. + + void HandleMap(const char** parameters, int pcnt, userrec* user) + { + // This array represents a virtual screen which we will + // "scratch" draw to, as the console device of an irc + // client does not provide for a proper terminal. + float totusers = 0; + float totservers = 0; + char matrix[128][80]; + for (unsigned int t = 0; t < 128; t++) + { + matrix[t][0] = '\0'; + } + line = 0; + // The only recursive bit is called here. + ShowMap(Utils->TreeRoot,user,0,matrix,totusers,totservers); + // Process each line one by one. The algorithm has a limit of + // 128 servers (which is far more than a spanning tree should have + // anyway, so we're ok). This limit can be raised simply by making + // the character matrix deeper, 128 rows taking 10k of memory. + for (int l = 1; l < line; l++) + { + // scan across the line looking for the start of the + // servername (the recursive part of the algorithm has placed + // the servers at indented positions depending on what they + // are related to) + int first_nonspace = 0; + while (matrix[l][first_nonspace] == ' ') + { + first_nonspace++; + } + first_nonspace--; + // Draw the `- (corner) section: this may be overwritten by + // another L shape passing along the same vertical pane, becoming + // a |- (branch) section instead. + matrix[l][first_nonspace] = '-'; + matrix[l][first_nonspace-1] = '`'; + int l2 = l - 1; + // Draw upwards until we hit the parent server, causing possibly + // other corners (`-) to become branches (|-) + while ((matrix[l2][first_nonspace-1] == ' ') || (matrix[l2][first_nonspace-1] == '`')) + { + matrix[l2][first_nonspace-1] = '|'; + l2--; + } + } + // dump the whole lot to the user. This is the easy bit, honest. + for (int t = 0; t < line; t++) + { + user->WriteServ("006 %s :%s",user->nick,&matrix[t][0]); + } + float avg_users = totusers / totservers; + user->WriteServ("270 %s :%.0f server%s and %.0f user%s, average %.2f users per server",user->nick,totservers,(totservers > 1 ? "s" : ""),totusers,(totusers > 1 ? "s" : ""),avg_users); + user->WriteServ("007 %s :End of /MAP",user->nick); + return; + } + + int HandleSquit(const char** parameters, int pcnt, userrec* user) + { + TreeServer* s = Utils->FindServerMask(parameters[0]); + if (s) + { + if (s == Utils->TreeRoot) + { + user->WriteServ("NOTICE %s :*** SQUIT: Foolish mortal, you cannot make a server SQUIT itself! (%s matches local server name)",user->nick,parameters[0]); + return 1; + } + TreeSocket* sock = s->GetSocket(); + if (sock) + { + ServerInstance->SNO->WriteToSnoMask('l',"SQUIT: Server \002%s\002 removed from network by %s",parameters[0],user->nick); + sock->Squit(s,std::string("Server quit by ") + user->GetFullRealHost()); + ServerInstance->SE->DelFd(sock); + sock->Close(); + delete sock; + } + else + { + /* route it */ + std::deque<std::string> params; + params.push_back(parameters[0]); + params.push_back(std::string(":Server quit by ") + user->GetFullRealHost()); + Utils->DoOneToOne(user->nick, "RSQUIT", params, parameters[0]); + } + } + else + { + user->WriteServ("NOTICE %s :*** SQUIT: The server \002%s\002 does not exist on the network.",user->nick,parameters[0]); + } + return 1; + } + + int HandleTime(const char** parameters, int pcnt, userrec* user) + { + if ((IS_LOCAL(user)) && (pcnt)) + { + TreeServer* found = Utils->FindServerMask(parameters[0]); + if (found) + { + // we dont' override for local server + if (found == Utils->TreeRoot) + return 0; + + std::deque<std::string> params; + params.push_back(found->GetName()); + params.push_back(user->nick); + Utils->DoOneToOne(ServerInstance->Config->ServerName,"TIME",params,found->GetName()); + } + else + { + user->WriteServ("402 %s %s :No such server",user->nick,parameters[0]); + } + } + return 1; + } + + int HandleRemoteWhois(const char** parameters, int pcnt, userrec* user) + { + if ((IS_LOCAL(user)) && (pcnt > 1)) + { + userrec* remote = ServerInstance->FindNick(parameters[1]); + if ((remote) && (remote->GetFd() < 0)) + { + std::deque<std::string> params; + params.push_back(parameters[1]); + Utils->DoOneToOne(user->nick,"IDLE",params,remote->server); + return 1; + } + else if (!remote) + { + user->WriteServ("401 %s %s :No such nick/channel",user->nick, parameters[1]); + user->WriteServ("318 %s %s :End of /WHOIS list.",user->nick, parameters[1]); + return 1; + } + } + return 0; + } + + void DoPingChecks(time_t curtime) + { + for (unsigned int j = 0; j < Utils->TreeRoot->ChildCount(); j++) + { + TreeServer* serv = Utils->TreeRoot->GetChild(j); + TreeSocket* sock = serv->GetSocket(); + if (sock) + { + if (curtime >= serv->NextPingTime()) + { + if (serv->AnsweredLastPing()) + { + sock->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" PING "+serv->GetName()); + serv->SetNextPingTime(curtime + 60); + } + else + { + // they didnt answer, boot them + ServerInstance->SNO->WriteToSnoMask('l',"Server \002%s\002 pinged out",serv->GetName().c_str()); + sock->Squit(serv,"Ping timeout"); + ServerInstance->SE->DelFd(sock); + sock->Close(); + delete sock; + return; + } + } + } + } + } + + void ConnectServer(Link* x) + { + insp_inaddr binip; + + /* Do we already have an IP? If so, no need to resolve it. */ + if (insp_aton(x->IPAddr.c_str(), &binip) > 0) + { + /* Gave a hook, but it wasnt one we know */ + if ((!x->Hook.empty()) && (Utils->hooks.find(x->Hook.c_str()) == Utils->hooks.end())) + return; + + TreeSocket* newsocket = new TreeSocket(Utils, ServerInstance, x->IPAddr,x->Port,false,x->Timeout ? x->Timeout : 10,x->Name.c_str(), x->Hook.empty() ? NULL : Utils->hooks[x->Hook.c_str()]); + if (newsocket->GetFd() > -1) + { + /* Handled automatically on success */ + } + else + { + ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: %s.",x->Name.c_str(),strerror(errno)); + delete newsocket; + Utils->DoFailOver(x); + } + } + else + { + try + { + bool cached; + ServernameResolver* snr = new ServernameResolver((Module*)this, Utils, ServerInstance,x->IPAddr, *x, cached); + ServerInstance->AddResolver(snr, cached); + } + catch (ModuleException& e) + { + ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: %s.",x->Name.c_str(), e.GetReason()); + Utils->DoFailOver(x); + } + } + } + + void AutoConnectServers(time_t curtime) + { + for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++) + { + if ((x->AutoConnect) && (curtime >= x->NextConnectTime)) + { + x->NextConnectTime = curtime + x->AutoConnect; + TreeServer* CheckDupe = Utils->FindServer(x->Name.c_str()); + if (x->FailOver.length()) + { + TreeServer* CheckFailOver = Utils->FindServer(x->FailOver.c_str()); + if (CheckFailOver) + { + /* The failover for this server is currently a member of the network. + * The failover probably succeeded, where the main link did not. + * Don't try the main link until the failover is gone again. + */ + continue; + } + } + if (!CheckDupe) + { + // an autoconnected server is not connected. Check if its time to connect it + ServerInstance->SNO->WriteToSnoMask('l',"AUTOCONNECT: Auto-connecting server \002%s\002 (%lu seconds until next attempt)",x->Name.c_str(),x->AutoConnect); + this->ConnectServer(&(*x)); + } + } + } + } + + int HandleVersion(const char** parameters, int pcnt, userrec* user) + { + // we've already checked if pcnt > 0, so this is safe + TreeServer* found = Utils->FindServerMask(parameters[0]); + if (found) + { + std::string Version = found->GetVersion(); + user->WriteServ("351 %s :%s",user->nick,Version.c_str()); + if (found == Utils->TreeRoot) + { + ServerInstance->Config->Send005(user); + } + } + else + { + user->WriteServ("402 %s %s :No such server",user->nick,parameters[0]); + } + return 1; + } + + int HandleConnect(const char** parameters, int pcnt, userrec* user) + { + for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++) + { + if (ServerInstance->MatchText(x->Name.c_str(),parameters[0])) + { + TreeServer* CheckDupe = Utils->FindServer(x->Name.c_str()); + if (!CheckDupe) + { + user->WriteServ("NOTICE %s :*** CONNECT: Connecting to server: \002%s\002 (%s:%d)",user->nick,x->Name.c_str(),(x->HiddenFromStats ? "<hidden>" : x->IPAddr.c_str()),x->Port); + ConnectServer(&(*x)); + return 1; + } + else + { + user->WriteServ("NOTICE %s :*** CONNECT: Server \002%s\002 already exists on the network and is connected via \002%s\002",user->nick,x->Name.c_str(),CheckDupe->GetParent()->GetName().c_str()); + return 1; + } + } + } + user->WriteServ("NOTICE %s :*** CONNECT: No server matching \002%s\002 could be found in the config file.",user->nick,parameters[0]); + return 1; + } + + void BroadcastTimeSync() + { + std::deque<std::string> params; + params.push_back(ConvToStr(ServerInstance->Time(true))); + Utils->DoOneToMany(Utils->TreeRoot->GetName(), "TIMESET", params); + } + + virtual int OnStats(char statschar, userrec* user, string_list &results) + { + if ((statschar == 'c') || (statschar == 'n')) + { + for (unsigned int i = 0; i < Utils->LinkBlocks.size(); i++) + { + results.push_back(std::string(ServerInstance->Config->ServerName)+" 213 "+user->nick+" "+statschar+" *@"+(Utils->LinkBlocks[i].HiddenFromStats ? "<hidden>" : Utils->LinkBlocks[i].IPAddr)+" * "+Utils->LinkBlocks[i].Name.c_str()+" "+ConvToStr(Utils->LinkBlocks[i].Port)+" "+(Utils->LinkBlocks[i].Hook.empty() ? "plaintext" : Utils->LinkBlocks[i].Hook)+" "+(Utils->LinkBlocks[i].AutoConnect ? 'a' : '-')+'s'); + if (statschar == 'c') + results.push_back(std::string(ServerInstance->Config->ServerName)+" 244 "+user->nick+" H * * "+Utils->LinkBlocks[i].Name.c_str()); + } + results.push_back(std::string(ServerInstance->Config->ServerName)+" 219 "+user->nick+" "+statschar+" :End of /STATS report"); + ServerInstance->SNO->WriteToSnoMask('t',"Notice: %s '%c' requested by %s (%s@%s)",(!strcmp(user->server,ServerInstance->Config->ServerName) ? "Stats" : "Remote stats"),statschar,user->nick,user->ident,user->host); + return 1; + } + return 0; + } + + virtual int OnPreCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, bool validated, const std::string &original_line) + { + /* If the command doesnt appear to be valid, we dont want to mess with it. */ + if (!validated) + return 0; + + if (command == "CONNECT") + { + return this->HandleConnect(parameters,pcnt,user); + } + else if (command == "STATS") + { + return this->HandleStats(parameters,pcnt,user); + } + else if (command == "MOTD") + { + return this->HandleMotd(parameters,pcnt,user); + } + else if (command == "ADMIN") + { + return this->HandleAdmin(parameters,pcnt,user); + } + else if (command == "SQUIT") + { + return this->HandleSquit(parameters,pcnt,user); + } + else if (command == "MAP") + { + this->HandleMap(parameters,pcnt,user); + return 1; + } + else if ((command == "TIME") && (pcnt > 0)) + { + return this->HandleTime(parameters,pcnt,user); + } + else if (command == "LUSERS") + { + this->HandleLusers(parameters,pcnt,user); + return 1; + } + else if (command == "LINKS") + { + this->HandleLinks(parameters,pcnt,user); + return 1; + } + else if (command == "WHOIS") + { + if (pcnt > 1) + { + // remote whois + return this->HandleRemoteWhois(parameters,pcnt,user); + } + } + else if ((command == "VERSION") && (pcnt > 0)) + { + this->HandleVersion(parameters,pcnt,user); + return 1; + } + + return 0; + } + + virtual void OnPostCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, CmdResult result, const std::string &original_line) + { + if ((result == CMD_SUCCESS) && (ServerInstance->IsValidModuleCommand(command, pcnt, user))) + { + // this bit of code cleverly routes all module commands + // to all remote severs *automatically* so that modules + // can just handle commands locally, without having + // to have any special provision in place for remote + // commands and linking protocols. + std::deque<std::string> params; + params.clear(); + for (int j = 0; j < pcnt; j++) + { + if (strchr(parameters[j],' ')) + { + params.push_back(":" + std::string(parameters[j])); + } + else + { + params.push_back(std::string(parameters[j])); + } + } + Utils->DoOneToMany(user->nick,command,params); + } + } + + virtual void OnGetServerDescription(const std::string &servername,std::string &description) + { + TreeServer* s = Utils->FindServer(servername); + if (s) + { + description = s->GetDesc(); + } + } + + virtual void OnUserInvite(userrec* source,userrec* dest,chanrec* channel) + { + if (IS_LOCAL(source)) + { + std::deque<std::string> params; + params.push_back(dest->nick); + params.push_back(channel->name); + Utils->DoOneToMany(source->nick,"INVITE",params); + } + } + + virtual void OnPostLocalTopicChange(userrec* user, chanrec* chan, const std::string &topic) + { + std::deque<std::string> params; + params.push_back(chan->name); + params.push_back(":"+topic); + Utils->DoOneToMany(user->nick,"TOPIC",params); + } + + virtual void OnWallops(userrec* user, const std::string &text) + { + if (IS_LOCAL(user)) + { + std::deque<std::string> params; + params.push_back(":"+text); + Utils->DoOneToMany(user->nick,"WALLOPS",params); + } + } + + virtual void OnUserNotice(userrec* user, void* dest, int target_type, const std::string &text, char status, const CUList &exempt_list) + { + if (target_type == TYPE_USER) + { + userrec* d = (userrec*)dest; + if ((d->GetFd() < 0) && (IS_LOCAL(user))) + { + std::deque<std::string> params; + params.clear(); + params.push_back(d->nick); + params.push_back(":"+text); + Utils->DoOneToOne(user->nick,"NOTICE",params,d->server); + } + } + else if (target_type == TYPE_CHANNEL) + { + if (IS_LOCAL(user)) + { + chanrec *c = (chanrec*)dest; + if (c) + { + std::string cname = c->name; + if (status) + cname = status + cname; + TreeServerList list; + Utils->GetListOfServersForChannel(c,list,status,exempt_list); + + for (TreeServerList::iterator i = list.begin(); i != list.end(); i++) + { + TreeSocket* Sock = i->second->GetSocket(); + if (Sock) + Sock->WriteLine(":"+std::string(user->nick)+" NOTICE "+cname+" :"+text); + } + } + } + } + else if (target_type == TYPE_SERVER) + { + if (IS_LOCAL(user)) + { + char* target = (char*)dest; + std::deque<std::string> par; + par.push_back(target); + par.push_back(":"+text); + Utils->DoOneToMany(user->nick,"NOTICE",par); + } + } + } + + virtual void OnUserMessage(userrec* user, void* dest, int target_type, const std::string &text, char status, const CUList &exempt_list) + { + if (target_type == TYPE_USER) + { + // route private messages which are targetted at clients only to the server + // which needs to receive them + userrec* d = (userrec*)dest; + if ((d->GetFd() < 0) && (IS_LOCAL(user))) + { + std::deque<std::string> params; + params.clear(); + params.push_back(d->nick); + params.push_back(":"+text); + Utils->DoOneToOne(user->nick,"PRIVMSG",params,d->server); + } + } + else if (target_type == TYPE_CHANNEL) + { + if (IS_LOCAL(user)) + { + chanrec *c = (chanrec*)dest; + if (c) + { + std::string cname = c->name; + if (status) + cname = status + cname; + TreeServerList list; + Utils->GetListOfServersForChannel(c,list,status,exempt_list); + + for (TreeServerList::iterator i = list.begin(); i != list.end(); i++) + { + TreeSocket* Sock = i->second->GetSocket(); + if (Sock) + Sock->WriteLine(":"+std::string(user->nick)+" PRIVMSG "+cname+" :"+text); + } + } + } + } + else if (target_type == TYPE_SERVER) + { + if (IS_LOCAL(user)) + { + char* target = (char*)dest; + std::deque<std::string> par; + par.push_back(target); + par.push_back(":"+text); + Utils->DoOneToMany(user->nick,"PRIVMSG",par); + } + } + } + + virtual void OnBackgroundTimer(time_t curtime) + { + AutoConnectServers(curtime); + DoPingChecks(curtime); + } + + virtual void OnUserJoin(userrec* user, chanrec* channel) + { + // Only do this for local users + if (IS_LOCAL(user)) + { + if (channel->GetUserCounter() == 1) + { + std::deque<std::string> params; + // set up their permissions and the channel TS with FJOIN. + // All users are FJOINed now, because a module may specify + // new joining permissions for the user. + params.push_back(channel->name); + params.push_back(ConvToStr(channel->age)); + params.push_back(std::string(channel->GetAllPrefixChars(user))+","+std::string(user->nick)); + Utils->DoOneToMany(ServerInstance->Config->ServerName,"FJOIN",params); + /* First user in, sync the modes for the channel */ + params.pop_back(); + /* This is safe, all inspircd servers default to +nt */ + params.push_back("+nt"); + Utils->DoOneToMany(ServerInstance->Config->ServerName,"FMODE",params); + } + else + { + std::deque<std::string> params; + params.push_back(channel->name); + params.push_back(ConvToStr(channel->age)); + Utils->DoOneToMany(user->nick,"JOIN",params); + } + } + } + + virtual void OnChangeHost(userrec* user, const std::string &newhost) + { + // only occurs for local clients + if (user->registered != REG_ALL) + return; + std::deque<std::string> params; + params.push_back(newhost); + Utils->DoOneToMany(user->nick,"FHOST",params); + } + + virtual void OnChangeName(userrec* user, const std::string &gecos) + { + // only occurs for local clients + if (user->registered != REG_ALL) + return; + std::deque<std::string> params; + params.push_back(gecos); + Utils->DoOneToMany(user->nick,"FNAME",params); + } + + virtual void OnUserPart(userrec* user, chanrec* channel, const std::string &partmessage) + { + if (IS_LOCAL(user)) + { + std::deque<std::string> params; + params.push_back(channel->name); + if (partmessage != "") + params.push_back(":"+partmessage); + Utils->DoOneToMany(user->nick,"PART",params); + } + } + + virtual void OnUserConnect(userrec* user) + { + char agestr[MAXBUF]; + if (IS_LOCAL(user)) + { + std::deque<std::string> params; + snprintf(agestr,MAXBUF,"%lu",(unsigned long)user->age); + params.push_back(agestr); + params.push_back(user->nick); + params.push_back(user->host); + params.push_back(user->dhost); + params.push_back(user->ident); + params.push_back("+"+std::string(user->FormatModes())); + params.push_back(user->GetIPString()); + params.push_back(":"+std::string(user->fullname)); + Utils->DoOneToMany(ServerInstance->Config->ServerName,"NICK",params); + + // User is Local, change needs to be reflected! + TreeServer* SourceServer = Utils->FindServer(user->server); + if (SourceServer) + { + SourceServer->AddUserCount(); + } + + } + } + + virtual void OnUserQuit(userrec* user, const std::string &reason) + { + if ((IS_LOCAL(user)) && (user->registered == REG_ALL)) + { + std::deque<std::string> params; + params.push_back(":"+reason); + Utils->DoOneToMany(user->nick,"QUIT",params); + } + // Regardless, We need to modify the user Counts.. + TreeServer* SourceServer = Utils->FindServer(user->server); + if (SourceServer) + { + SourceServer->DelUserCount(); + } + + } + + virtual void OnUserPostNick(userrec* user, const std::string &oldnick) + { + if (IS_LOCAL(user)) + { + std::deque<std::string> params; + params.push_back(user->nick); + Utils->DoOneToMany(oldnick,"NICK",params); + } + } + + virtual void OnUserKick(userrec* source, userrec* user, chanrec* chan, const std::string &reason) + { + if ((source) && (IS_LOCAL(source))) + { + std::deque<std::string> params; + params.push_back(chan->name); + params.push_back(user->nick); + params.push_back(":"+reason); + Utils->DoOneToMany(source->nick,"KICK",params); + } + else if (!source) + { + std::deque<std::string> params; + params.push_back(chan->name); + params.push_back(user->nick); + params.push_back(":"+reason); + Utils->DoOneToMany(ServerInstance->Config->ServerName,"KICK",params); + } + } + + virtual void OnRemoteKill(userrec* source, userrec* dest, const std::string &reason) + { + std::deque<std::string> params; + params.push_back(dest->nick); + params.push_back(":"+reason); + Utils->DoOneToMany(source->nick,"KILL",params); + } + + virtual void OnRehash(userrec* user, const std::string ¶meter) + { + if (parameter != "") + { + std::deque<std::string> params; + params.push_back(parameter); + Utils->DoOneToMany(user ? user->nick : ServerInstance->Config->ServerName, "REHASH", params); + // check for self + if (ServerInstance->MatchText(ServerInstance->Config->ServerName,parameter)) + { + ServerInstance->WriteOpers("*** Remote rehash initiated locally by \002%s\002", user ? user->nick : ServerInstance->Config->ServerName); + ServerInstance->RehashServer(); + } + } + Utils->ReadConfiguration(false); + InitializeDisabledCommands(ServerInstance->Config->DisabledCommands, ServerInstance); + } + + // note: the protocol does not allow direct umode +o except + // via NICK with 8 params. sending OPERTYPE infers +o modechange + // locally. + virtual void OnOper(userrec* user, const std::string &opertype) + { + if (IS_LOCAL(user)) + { + std::deque<std::string> params; + params.push_back(opertype); + Utils->DoOneToMany(user->nick,"OPERTYPE",params); + } + } + + void OnLine(userrec* source, const std::string &host, bool adding, char linetype, long duration, const std::string &reason) + { + if (!source) + { + /* Server-set lines */ + char data[MAXBUF]; + snprintf(data,MAXBUF,"%c %s %s %lu %lu :%s", linetype, host.c_str(), ServerInstance->Config->ServerName, (unsigned long)ServerInstance->Time(false), + (unsigned long)duration, reason.c_str()); + std::deque<std::string> params; + params.push_back(data); + Utils->DoOneToMany(ServerInstance->Config->ServerName, "ADDLINE", params); + } + else + { + if (IS_LOCAL(source)) + { + char type[8]; + snprintf(type,8,"%cLINE",linetype); + std::string stype = type; + if (adding) + { + char sduration[MAXBUF]; + snprintf(sduration,MAXBUF,"%ld",duration); + std::deque<std::string> params; + params.push_back(host); + params.push_back(sduration); + params.push_back(":"+reason); + Utils->DoOneToMany(source->nick,stype,params); + } + else + { + std::deque<std::string> params; + params.push_back(host); + Utils->DoOneToMany(source->nick,stype,params); + } + } + } + } + + virtual void OnAddGLine(long duration, userrec* source, const std::string &reason, const std::string &hostmask) + { + OnLine(source,hostmask,true,'G',duration,reason); + } + + virtual void OnAddZLine(long duration, userrec* source, const std::string &reason, const std::string &ipmask) + { + OnLine(source,ipmask,true,'Z',duration,reason); + } + + virtual void OnAddQLine(long duration, userrec* source, const std::string &reason, const std::string &nickmask) + { + OnLine(source,nickmask,true,'Q',duration,reason); + } + + virtual void OnAddELine(long duration, userrec* source, const std::string &reason, const std::string &hostmask) + { + OnLine(source,hostmask,true,'E',duration,reason); + } + + virtual void OnDelGLine(userrec* source, const std::string &hostmask) + { + OnLine(source,hostmask,false,'G',0,""); + } + + virtual void OnDelZLine(userrec* source, const std::string &ipmask) + { + OnLine(source,ipmask,false,'Z',0,""); + } + + virtual void OnDelQLine(userrec* source, const std::string &nickmask) + { + OnLine(source,nickmask,false,'Q',0,""); + } + + virtual void OnDelELine(userrec* source, const std::string &hostmask) + { + OnLine(source,hostmask,false,'E',0,""); + } + + virtual void OnMode(userrec* user, void* dest, int target_type, const std::string &text) + { + if ((IS_LOCAL(user)) && (user->registered == REG_ALL)) + { + if (target_type == TYPE_USER) + { + userrec* u = (userrec*)dest; + std::deque<std::string> params; + params.push_back(u->nick); + params.push_back(text); + Utils->DoOneToMany(user->nick,"MODE",params); + } + else + { + chanrec* c = (chanrec*)dest; + std::deque<std::string> params; + params.push_back(c->name); + params.push_back(text); + Utils->DoOneToMany(user->nick,"MODE",params); + } + } + } + + virtual void OnSetAway(userrec* user) + { + if (IS_LOCAL(user)) + { + std::deque<std::string> params; + params.push_back(":"+std::string(user->awaymsg)); + Utils->DoOneToMany(user->nick,"AWAY",params); + } + } + + virtual void OnCancelAway(userrec* user) + { + if (IS_LOCAL(user)) + { + std::deque<std::string> params; + params.clear(); + Utils->DoOneToMany(user->nick,"AWAY",params); + } + } + + virtual void ProtoSendMode(void* opaque, int target_type, void* target, const std::string &modeline) + { + TreeSocket* s = (TreeSocket*)opaque; + if (target) + { + if (target_type == TYPE_USER) + { + userrec* u = (userrec*)target; + s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" FMODE "+u->nick+" "+ConvToStr(u->age)+" "+modeline); + } + else + { + chanrec* c = (chanrec*)target; + s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age)+" "+modeline); + } + } + } + + virtual void ProtoSendMetaData(void* opaque, int target_type, void* target, const std::string &extname, const std::string &extdata) + { + TreeSocket* s = (TreeSocket*)opaque; + if (target) + { + if (target_type == TYPE_USER) + { + userrec* u = (userrec*)target; + s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA "+u->nick+" "+extname+" :"+extdata); + } + else if (target_type == TYPE_CHANNEL) + { + chanrec* c = (chanrec*)target; + s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA "+c->name+" "+extname+" :"+extdata); + } + } + if (target_type == TYPE_OTHER) + { + s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA * "+extname+" :"+extdata); + } + } + + virtual void OnEvent(Event* event) + { + std::deque<std::string>* params = (std::deque<std::string>*)event->GetData(); + + if (event->GetEventID() == "send_metadata") + { + if (params->size() < 3) + return; + (*params)[2] = ":" + (*params)[2]; + Utils->DoOneToMany(ServerInstance->Config->ServerName,"METADATA",*params); + } + else if (event->GetEventID() == "send_topic") + { + if (params->size() < 2) + return; + (*params)[1] = ":" + (*params)[1]; + params->insert(params->begin() + 1,ServerInstance->Config->ServerName); + params->insert(params->begin() + 1,ConvToStr(ServerInstance->Time(true))); + Utils->DoOneToMany(ServerInstance->Config->ServerName,"FTOPIC",*params); + } + else if (event->GetEventID() == "send_mode") + { + if (params->size() < 2) + return; + // Insert the TS value of the object, either userrec or chanrec + time_t ourTS = 0; + userrec* a = ServerInstance->FindNick((*params)[0]); + if (a) + { + ourTS = a->age; + } + else + { + chanrec* a = ServerInstance->FindChan((*params)[0]); + if (a) + { + ourTS = a->age; + } + } + params->insert(params->begin() + 1,ConvToStr(ourTS)); + Utils->DoOneToMany(ServerInstance->Config->ServerName,"FMODE",*params); + } + else if (event->GetEventID() == "send_mode_explicit") + { + if (params->size() < 2) + return; + Utils->DoOneToMany(ServerInstance->Config->ServerName,"MODE",*params); + } + else if (event->GetEventID() == "send_opers") + { + if (params->size() < 1) + return; + (*params)[0] = ":" + (*params)[0]; + Utils->DoOneToMany(ServerInstance->Config->ServerName,"OPERNOTICE",*params); + } + else if (event->GetEventID() == "send_modeset") + { + if (params->size() < 2) + return; + (*params)[1] = ":" + (*params)[1]; + Utils->DoOneToMany(ServerInstance->Config->ServerName,"MODENOTICE",*params); + } + else if (event->GetEventID() == "send_snoset") + { + if (params->size() < 2) + return; + (*params)[1] = ":" + (*params)[1]; + Utils->DoOneToMany(ServerInstance->Config->ServerName,"SNONOTICE",*params); + } + else if (event->GetEventID() == "send_push") + { + if (params->size() < 2) + return; + + userrec *a = ServerInstance->FindNick((*params)[0]); + + if (!a) + return; + + (*params)[1] = ":" + (*params)[1]; + Utils->DoOneToOne(ServerInstance->Config->ServerName, "PUSH", *params, a->server); + } + } + + virtual ~ModuleSpanningTree() + { + /* This will also free the listeners */ + delete Utils; + if (SyncTimer) + ServerInstance->Timers->DelTimer(SyncTimer); + + ServerInstance->DoneWithInterface("InspSocketHook"); + } + + virtual Version GetVersion() + { + return Version(1,1,0,2,VF_VENDOR,API_VERSION); + } + + void Implements(char* List) + { + List[I_OnPreCommand] = List[I_OnGetServerDescription] = List[I_OnUserInvite] = List[I_OnPostLocalTopicChange] = 1; + List[I_OnWallops] = List[I_OnUserNotice] = List[I_OnUserMessage] = List[I_OnBackgroundTimer] = 1; + List[I_OnUserJoin] = List[I_OnChangeHost] = List[I_OnChangeName] = List[I_OnUserPart] = List[I_OnUserConnect] = 1; + List[I_OnUserQuit] = List[I_OnUserPostNick] = List[I_OnUserKick] = List[I_OnRemoteKill] = List[I_OnRehash] = 1; + List[I_OnOper] = List[I_OnAddGLine] = List[I_OnAddZLine] = List[I_OnAddQLine] = List[I_OnAddELine] = 1; + List[I_OnDelGLine] = List[I_OnDelZLine] = List[I_OnDelQLine] = List[I_OnDelELine] = List[I_ProtoSendMode] = List[I_OnMode] = 1; + List[I_OnStats] = List[I_ProtoSendMetaData] = List[I_OnEvent] = List[I_OnSetAway] = List[I_OnCancelAway] = List[I_OnPostCommand] = 1; + } + + /* It is IMPORTANT that m_spanningtree is the last module in the chain + * so that any activity it sees is FINAL, e.g. we arent going to send out + * a NICK message before m_cloaking has finished putting the +x on the user, + * etc etc. + * Therefore, we return PRIORITY_LAST to make sure we end up at the END of + * the module call queue. + */ + Priority Prioritize() + { + return PRIORITY_LAST; + } +}; + +TimeSyncTimer::TimeSyncTimer(InspIRCd *Inst, ModuleSpanningTree *Mod) : InspTimer(43200, Inst->Time(), true), Instance(Inst), Module(Mod) +{ +} + +void TimeSyncTimer::Tick(time_t TIME) +{ + Module->BroadcastTimeSync(); +} + +void SpanningTreeUtilities::DoFailOver(Link* x) +{ + if (x->FailOver.length()) + { + if (x->FailOver == x->Name) + { + ServerInstance->SNO->WriteToSnoMask('l',"FAILOVER: Some muppet configured the failover for server \002%s\002 to point at itself. Not following it!", x->Name.c_str()); + return; + } + Link* TryThisOne = this->FindLink(x->FailOver.c_str()); + if (TryThisOne) + { + ServerInstance->SNO->WriteToSnoMask('l',"FAILOVER: Trying failover link for \002%s\002: \002%s\002...", x->Name.c_str(), TryThisOne->Name.c_str()); + Creator->ConnectServer(TryThisOne); + } + else + { + ServerInstance->SNO->WriteToSnoMask('l',"FAILOVER: Invalid failover server specified for server \002%s\002, will not follow!", x->Name.c_str()); + } + } +} + +Link* SpanningTreeUtilities::FindLink(const std::string& name) +{ + for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++) + { + if (ServerInstance->MatchText(x->Name.c_str(), name.c_str())) + { + return &(*x); + } + } + return NULL; +} + +class ModuleSpanningTreeFactory : public ModuleFactory +{ + public: + ModuleSpanningTreeFactory() + { + } + + ~ModuleSpanningTreeFactory() + { + } + + virtual Module * CreateModule(InspIRCd* Me) + { + return new ModuleSpanningTree(Me); + } + +}; + + +extern "C" void * init_module( void ) +{ + return new ModuleSpanningTreeFactory; +} |