2 * InspIRCd -- Internet Relay Chat Daemon
4 * Copyright (C) 2008 Robin Burchell <robin+git@viroteck.net>
5 * Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
6 * Copyright (C) 2007 Craig Edwards <craigedwards@brainbox.cc>
8 * This file is part of InspIRCd. InspIRCd is free software: you can
9 * redistribute it and/or modify it under the terms of the GNU General Public
10 * License as published by the Free Software Foundation, version 2.
12 * This program is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
14 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
17 * You should have received a copy of the GNU General Public License
18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
24 #include "treesocket.h"
26 /** Each server in the tree is represented by one class of
27 * type TreeServer. A locally connected TreeServer can
28 * have a class of type TreeSocket associated with it, for
29 * remote servers, the TreeSocket entry will be NULL.
30 * Each server also maintains a pointer to its parent
31 * (NULL if this server is ours, at the top of the tree)
32 * and a pointer to its "Route" (see the comments in the
33 * constructors below), and also a dynamic list of pointers
34 * to its children which can be iterated recursively
35 * if required. Creating or deleting objects of type
36 i* TreeServer automatically maintains the hash_map of
37 * TreeServer items, deleting and inserting them as they
38 * are created and destroyed.
40 class TreeServer : public Server
42 TreeServer* Parent; /* Parent entry */
43 TreeServer* Route; /* Route entry */
44 std::vector<TreeServer*> Children; /* List of child objects */
45 std::string VersionString; /* Version string or empty string */
47 /** Full version string including patch version and other info
49 std::string fullversion;
51 TreeSocket* Socket; /* Socket used to communicate with this server */
52 time_t NextPing; /* After this time, the server should be PINGed*/
53 bool LastPingWasGood; /* True if the server responded to the last PING with a PONG */
54 std::string sid; /* Server ID */
56 /** Counter counting how many servers are bursting in front of this server, including
57 * this server. Set to parents' value on construction then it is increased if the
58 * server itself starts bursting. Decreased when a server on the path to this server
61 unsigned int behind_bursting;
63 /** This method is used to add this TreeServer to the
64 * hash maps. It is only called by the constructors.
68 /** Used by SQuit logic to recursively remove servers
70 void SQuitInternal(const std::string& reason, int& num_lost_servers, int& num_lost_users);
73 typedef std::vector<TreeServer*> ChildServers;
74 FakeUser* const ServerUser; /* User representing this server */
77 bool Warned; /* True if we've warned opers about high latency on this server */
79 unsigned int UserCount; /* How many users are on this server? [note: doesn't care about +i] */
80 unsigned int OperCount; /* How many opers are on this server? */
82 /** We use this constructor only to create the 'root' item, Utils->TreeRoot, which
83 * represents our own server. Therefore, it has no route, no parent, and
84 * no socket associated with it. Its version string is our own local version.
88 /** When we create a new server, we call this constructor to initialize it.
89 * This constructor initializes the server's Route and Parent, and sets up
90 * its ping counters so that it will be pinged one minute from now.
92 TreeServer(const std::string& Name, const std::string& Desc, const std::string& id, TreeServer* Above, TreeSocket* Sock, bool Hide);
94 /** SQuit a server connected to this server, removing the given server and all servers behind it
95 * @param server Server to squit, must be directly below this server
96 * @param reason Reason for quitting the server, sent to opers and other servers
98 void SQuitChild(TreeServer* server, const std::string& reason);
100 /** SQuit this server, removing this server and all servers behind it
101 * @param reason Reason for quitting the server, sent to opers and other servers
103 void SQuit(const std::string& reason)
105 GetParent()->SQuitChild(this, reason);
108 int QuitUsers(const std::string &reason);
111 * The 'route' is defined as the locally-
112 * connected server which can be used to reach this server.
114 TreeServer* GetRoute();
116 /** Returns true if this server is the tree root (i.e.: us)
118 bool IsRoot() const { return (this->Parent == NULL); }
120 /** Returns true if this server is locally connected
122 bool IsLocal() const { return (this->Route == this); }
124 /** Get server version string
126 const std::string& GetVersion();
128 /** Get the full version string of this server
129 * @return The full version string of this server, including patch version and other info
131 const std::string& GetFullVersion() const { return fullversion; }
133 /** Set time we are next due to ping this server
135 void SetNextPingTime(time_t t);
137 /** Get the time we are next due to ping this server
139 time_t NextPingTime();
141 /** Last ping time in milliseconds, used to calculate round trip time
143 unsigned long LastPingMsec;
145 /** Round trip time of last ping
149 /** When we recieved BURST from this server, used to calculate total burst time at ENDBURST.
151 unsigned long StartBurst;
153 /** True if this server is hidden
157 /** True if the server answered their last ping
159 bool AnsweredLastPing();
161 /** Set the server as responding to its last ping
165 /** Get the TreeSocket pointer for local servers.
166 * For remote servers, this returns NULL.
168 TreeSocket* GetSocket();
170 /** Get the parent server.
171 * For the root node, this returns NULL.
173 TreeServer* GetParent();
175 /** Set the server version string
177 void SetVersion(const std::string &Version);
179 /** Set the full version string
180 * @param verstr The version string to set
182 void SetFullVersion(const std::string& verstr) { fullversion = verstr; }
184 /** Sets the description of this server. Called when the description of a remote server changes
185 * and we are notified about it.
186 * @param descstr The description to set
188 void SetDesc(const std::string& descstr) { description = descstr; }
190 /** Return all child servers
192 const ChildServers& GetChildren() const { return Children; }
194 /** Add a child server
196 void AddChild(TreeServer* Child);
198 /** Delete a child server, return false if it didn't exist.
200 bool DelChild(TreeServer* Child);
202 /** Removes child nodes of this node, and of that node, etc etc.
203 * This is used during netsplits to automatically tidy up the
204 * server tree. It is slow, we don't use it for much else.
210 const std::string& GetID();
212 /** Marks a server as having finished bursting and performs appropriate actions.
215 /** Recursive call for child servers */
216 void FinishBurstInternal();
218 /** (Re)check the uline state of this server
222 /** Get the bursting state of this server
223 * @return True if this server is bursting, false if it isn't
225 bool IsBursting() const { return (StartBurst != 0); }
227 /** Check whether this server is behind a bursting server or is itself bursting.
228 * This can tell whether a user is on a part of the network that is still bursting.
229 * @return True if this server is bursting or is behind a server that is bursting, false if it isn't
231 bool IsBehindBursting() const { return (behind_bursting != 0); }
233 /** Set the bursting state of the server
234 * @param startms Time the server started bursting, if 0 or omitted, use current time
236 void BeginBurst(unsigned long startms = 0);
241 * Removes the reference to this object from the
246 /** Returns the TreeServer the given user is connected to
247 * @param user The user whose server to return
248 * @return The TreeServer this user is connected to.
250 static TreeServer* Get(User* user)
252 return static_cast<TreeServer*>(user->server);