/* +------------------------------------+ * | 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; /* macros to the relevant system address description structs */ #ifdef IPV6 /** insp_sockaddr for ipv6 */ typedef struct sockaddr_in6 insp_sockaddr; /** insp_inaddr for ipv6 */ typedef struct in6_addr insp_inaddr; #define AF_FAMILY AF_INET6 #define PF_PROTOCOL PF_INET6 #else /** insp_sockaddr for ipv4 */ typedef struct sockaddr_in insp_sockaddr; /** insp_inaddr for ipv4 */ typedef struct in_addr insp_inaddr; #define AF_FAMILY AF_INET #define PF_PROTOCOL PF_INET #endif /** 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); /** Convert an insp_inaddr into human readable form. * * @param n An insp_inaddr (IP address) structure * @return A human-readable address. IPV6 addresses * will be shortened to remove fields which are 0. */ CoreExport const char* insp_ntoa(insp_inaddr n); /** Convert a human-readable address into an insp_inaddr. * * @param a A human-readable address * @param n An insp_inaddr struct which the result * will be copied into on success. * @return This method will return a negative value if address * does not contain a valid address family. 0 if the address is * does not contain a valid string representing a valid network * address. A positive value is returned if the network address * was successfully converted. * or any other number upon failure. */ CoreExport int insp_aton(const char* a, insp_inaddr* n); /** 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 char* addr, int socktype = SOCK_STREAM); /** Return the size of the structure for syscall passing */ int sa_size(irc::sockets::sockaddrs& sa) { return sa.sa.sa_family == AF_INET ? sizeof(sa.in4) : sizeof(sa.in6); } /** 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 int aptosa(const char* 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 int satoap(const irc::sockets::sockaddrs* sa, std::string& addr, int &port); } } /** 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: /** The creator/owner of this object */ InspIRCd* ServerInstance; /** Socket description (shown in stats p) */ std::string desc; /** Address socket is bound to */ std::string bind_addr; /** Port socket is bound to */ int bind_port; /** 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(InspIRCd* Instance, 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() { return bind_port; } /** Get IP address socket is bound to */ const std::string &GetIP() { return bind_addr; } /** 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 ipconnectedto The IP address the connection arrived on * @param fd The file descriptor of the new connection * @param incomingip The IP from which the connection was made */ virtual void OnAcceptReady(const std::string &ipconnectedto, int fd, const std::string &incomingip) = 0; }; class CoreExport ClientListenSocket : public ListenSocketBase { virtual void OnAcceptReady(const std::string &ipconnectedto, int fd, const std::string &incomingip); public: ClientListenSocket(InspIRCd* Instance, int port, const std::string &addr) : ListenSocketBase(Instance, port, addr) { } }; #endif