/* +------------------------------------+ * | Inspire Internet Relay Chat Daemon | * +------------------------------------+ * * Inspire is copyright (C) 2002-2004 ChatSpike-Dev. * E-mail: * * * * Written by Craig Edwards, Craig McLure, and others. * This program is free but copyrighted software; see * the file COPYING for details. * * --------------------------------------------------- */ #include "inspircd_config.h" #include "base.h" #include #include #include #include #include #include #include #include #include #include #include #include #ifndef __CONNECTION_H__ #define __CONNECTION_H__ #define STATE_DISCONNECTED 0 #define STATE_CONNECTED 1 #define STATE_SYNC 2 #define STATE_NOAUTH_INBOUND 3 #define STATE_NOAUTH_OUTBOUND 4 #define STATE_SERVICES 5 /** Each connection has one or more of these * each represents ONE outbound connection to another ircd * so each inbound has multiple outbounds. A listening socket * that accepts server type connections is represented by one * class serverrec. Class serverrec will instantiate several * objects of type ircd_connector to represent each established * connection, inbound or outbound. So, to determine all linked * servers you must walk through all the serverrecs that the * core defines, and in each one iterate through until you find * connection(s) relating to the server you want information on. * The core and module API provide functions for this. */ class ircd_connector : public Extensible { private: /** Sockaddr of the outbound ip and port */ sockaddr_in addr; /** File descriptor of the connection */ int fd; /** Server name */ std::string servername; /** Server 'GECOS' */ std::string description; /** State. STATE_NOAUTH_INBOUND, STATE_NOAUTH_OUTBOUND * STATE_SYNC, STATE_DISCONNECTED, STATE_CONNECTED */ char state; /** PRIVATE function to set the host address and port to connect to */ bool SetHostAddress(char* host, int port); /** This string holds the ircd's version response */ std::string version; public: /** IRCD Buffer for input characters, holds as many lines as are * pending - Note that the final line may not be complete and should * only be read when there is a \n seperator. */ std::string ircdbuffer; /** When MakeOutboundConnection is called, these public members are * filled with the details passed to the function, for future * reference */ char host[MAXBUF]; /** When MakeOutboundConnection is called, these public members are * filled with the details passed to the function, for future * reference */ int port; /** Server names of servers that this server is linked to * So for A->B->C, if this was the record for B it would contain A and C * whilever both servers are connected to B. */ std::vector routes; /** Create an outbound connection to a listening socket */ bool MakeOutboundConnection(char* newhost, int newport); /** Return the servername on this established connection */ std::string GetServerName(); /** Set the server name of this connection */ void SetServerName(std::string serv); /** Get the file descriptor associated with this connection */ int GetDescriptor(); /** Set the file descriptor for this connection */ void SetDescriptor(int fd); /** Get the state flags for this connection */ int GetState(); /** Set the state flags for this connection */ void SetState(int state); /** Get the ip address (not servername) associated with this connection */ char* GetServerIP(); /** Get the server description of this connection */ std::string GetDescription(); /** Set the server description of this connection */ void SetDescription(std::string desc); /** Get the port number being used for this connection * If the connection is outbound this will be the remote port * otherwise it will be the local port, so it can always be * gautanteed as open at the address given in GetServerIP(). */ int GetServerPort(); /** Set the port used by this connection */ void SetServerPort(int p); /** Set both the host and the port in one operation for this connection */ bool SetHostAndPort(char* newhost, int newport); /** Close the connection by calling close() on its file descriptor * This function call updates no other data. */ void CloseConnection(); /** This method adds text to the ircd connection's buffer * There is no limitation on how much text of what line width may * be added to this buffer. It is the sending server's responsibility * to ensure sent data is kept within reasonable quanities. */ void AddBuffer(std::string a); /** This method returns true if the buffer contains at least one * carriage return character, e.g. one line can be read from the * buffer successfully. */ bool BufferIsComplete(); /** This method clears the server's buffer by setting it to an empty string. */ void ClearBuffer(); /** This method retrieves the first string from the tail end of the * buffer and advances the tail end of the buffer past the returned * string, in a similar manner to strtok(). */ std::string GetBuffer(); /** This method sets the version string of the remote server */ void SetVersionString(std::string newversion); /** This method returns the version string of the remote server. * If the server has no version string an empty string is returned. */ std::string GetVersionString(); }; /** Please note: classes serverrec and userrec both inherit from class connection. */ class connection : public Extensible { public: /** File descriptor of the connection */ int fd; /** Hostname of connection. Not used if this is a serverrec */ char host[160]; /** IP of connection. */ char ip[16]; /** Stats counter for bytes inbound */ long bytes_in; /** Stats counter for bytes outbound */ long bytes_out; /** Stats counter for commands inbound */ long cmds_in; /** Stats counter for commands outbound */ long cmds_out; /** True if server/user has authenticated, false if otherwise */ bool haspassed; /** Port number * For a userrec, this is the port they connected to the network on. * For a serverrec this is the current listening port of the serverrec object. */ int port; /** Used by userrec to indicate the registration status of the connection */ char registered; /** Time the connection was last pinged */ time_t lastping; /** Time the connection was created, set in the constructor */ time_t signon; /** Time that the connection last sent data, used to calculate idle time */ time_t idle_lastmsg; /** Used by PING checks with clients */ time_t nping; /** With a serverrec, this is a list of all established server connections. * With a userrec this is unused. */ std::vector connectors; /** Default constructor */ connection(); /** Create a listening socket on 'host' using port number 'p' */ bool CreateListener(char* host, int p); /** Begin an outbound link to another ircd at targethost. */ bool BeginLink(char* targethost, int port, char* password, char* servername, int myport); /** Begin an outbound mesh link to another ircd on a network you are already an authenticated member of */ bool MeshCookie(char* targethost, int port, unsigned long cookie, char* servername); /** Terminate a link to 'targethost' by calling the ircd_connector::CloseConnection method. */ void TerminateLink(char* targethost); /** Send a message to a server by name, if the server is unavailable directly route the packet via another server * If the server still cannot be reached after attempting to route the message remotely, returns false. */ bool SendPacket(char *message, const char* host); /** Returns the next available packet and returns true if data is available. Writes the servername the data came from to 'host'. * If no data is available this function returns false. * This function will automatically close broken links and reroute pathways, generating split messages on the network. */ bool RecvPacket(std::deque &messages, char* host); /** Find the ircd_connector oject related to a certain servername given in 'host' */ ircd_connector* FindHost(std::string host); /** Add an incoming connection to the connection pool. * (reserved for core use) */ bool AddIncoming(int fd,char* targethost, int sourceport); }; #endif