/* +------------------------------------+ * | Inspire Internet Relay Chat Daemon | * +------------------------------------+ * * InspIRCd: (C) 2002-2009 InspIRCd Development Team * See: http://wiki.inspircd.org/Credits * * This program is free but copyrighted software; see * the file COPYING for details. * * --------------------------------------------------- */ #ifndef INSPIRCD_SOCKET_H #define INSPIRCD_SOCKET_H #ifndef WIN32 #include #include #include #include #include #include #include #include #include #include #else #include "inspircd_win32wrapper.h" #endif #include #include "socketengine.h" /* Contains irc-specific definitions */ namespace irc { /** This namespace contains various protocol-independent helper classes. * It also contains some types which are often used by the core and modules * in place of inet_* functions and types. */ namespace sockets { typedef union { struct sockaddr sa; struct sockaddr_in in4; struct sockaddr_in6 in6; } sockaddrs; /** Match raw binary data using CIDR rules. * * This function will use binary comparison to compare the * two bit sequences, address and mask, up to mask_bits * bits in size. If they match, it will return true. * @param address The whole address, of 4 or 16 bytes in length * @param mask The mask, from 1 to 16 bytes in length, anything * from 1 to 128 bits of which is significant * @param mask_Bits How many bits of the mask parameter are significant * for this comparison. * @returns True if the first mask_bits of address matches the first * mask_bits of mask. */ CoreExport bool MatchCIDRBits(const unsigned char* address, const unsigned char* mask, unsigned int mask_bits); /** Match CIDR, without matching username/nickname parts. * * This function will compare a human-readable address against a human- * readable CIDR mask, for example 1.2.3.4 against 1.2.0.0/16. This * method supports both IPV4 and IPV6 addresses. * @param address The human readable address, e.g. 1.2.3.4 * @param cidr_mask The human readable mask, e.g. 1.2.0.0/16 * @return True if the mask matches the address */ CoreExport bool MatchCIDR(const std::string &address, const std::string &cidr_mask); /** Match CIDR, including an optional username/nickname part. * * This function will compare a human-readable address (plus * optional username and nickname) against a human-readable * CIDR mask, for example joe!bloggs\@1.2.3.4 against * *!bloggs\@1.2.0.0/16. This method supports both IPV4 and * IPV6 addresses. * @param address The human readable address, e.g. fred\@1.2.3.4 * @param cidr_mask The human readable mask, e.g. *\@1.2.0.0/16 * @return True if the mask matches the address */ CoreExport bool MatchCIDR(const std::string &address, const std::string &cidr_mask, bool match_with_username); /** Create a new valid file descriptor using socket() * @return On return this function will return a value >= 0 for success, * or a negative value upon failure (negative values are invalid file * descriptors) */ CoreExport int OpenTCPSocket(const std::string& addr, int socktype = SOCK_STREAM); /** Return the size of the structure for syscall passing */ CoreExport int sa_size(const irc::sockets::sockaddrs& sa); /** Convert an address-port pair into a binary sockaddr * @param addr The IP address, IPv4 or IPv6 * @param port The port, 0 for unspecified * @param sa The structure to place the result in. Will be zeroed prior to conversion * @return true if the conversion was successful, false if not. */ CoreExport bool aptosa(const std::string& addr, int port, irc::sockets::sockaddrs* sa); /** Convert a binary sockaddr to an address-port pair * @param sa The structure to convert * @param addr the IP address * @param port the port * @return true if the conversion was successful, false if unknown address family */ CoreExport bool satoap(const irc::sockets::sockaddrs* sa, std::string& addr, int &port); /** Convert a binary sockaddr to a user-readable string. * This means IPv6 addresses are written as [::1]:6667, and *:6668 is used for 0.0.0.0:6668 * @param sa The structure to convert * @return The string; "" if not a valid address */ CoreExport std::string satouser(const irc::sockets::sockaddrs* sa); } } /** This class handles incoming connections on client ports. * It will create a new User for every valid connection * and assign it a file descriptor. */ class CoreExport ListenSocketBase : public EventHandler { protected: /** Socket description (shown in stats p) */ std::string desc; /** Raw address socket is bound to */ std::string bind_addr; /** Port socket is bound to */ int bind_port; /** Human-readable address/port socket is bound to */ std::string bind_desc; /** The client address if the most recently connected client. * Should only be used when accepting a new client. */ static irc::sockets::sockaddrs client; /** The server address used by the most recently connected client. * This may differ from the bind address by having a nonzero address, * if the port is wildcard bound, or being IPv4 on a 6to4 IPv6 port. * The address family will always match that of "client" */ static irc::sockets::sockaddrs server; public: /** Create a new listening socket */ ListenSocketBase(int port, const std::string &addr); /** Handle an I/O event */ void HandleEvent(EventType et, int errornum = 0); /** Close the socket */ ~ListenSocketBase(); /** Set descriptive text */ void SetDescription(const std::string &description) { desc = description; } /** Get description for socket */ const std::string& GetDescription() { return desc; } /** Get port number for socket */ int GetPort() const { return bind_port; } /** Get IP address socket is bound to */ const std::string &GetIP() { return bind_addr; } const std::string &GetBindDesc() { return bind_desc; } /** Handles sockets internals crap of a connection, convenience wrapper really */ void AcceptInternal(); /** Called when a new connection has successfully been accepted on this listener. * @param fd The file descriptor of the new connection */ virtual void OnAcceptReady(int fd) = 0; }; class CoreExport ClientListenSocket : public ListenSocketBase { virtual void OnAcceptReady(int fd); public: ClientListenSocket(int port, const std::string &addr) : ListenSocketBase(port, addr) { } }; #endif