/* * ipsock.h * * Internet Protocol socket I/O channel class. * * Portable Tools Library * * Copyright (c) 1993-1998 Equivalence Pty. Ltd. * * The contents of this file are subject to the Mozilla Public License * Version 1.0 (the "License"); you may not use this file except in * compliance with the License. You may obtain a copy of the License at * http://www.mozilla.org/MPL/ * * Software distributed under the License is distributed on an "AS IS" * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See * the License for the specific language governing rights and limitations * under the License. * * The Original Code is Portable Windows Library. * * The Initial Developer of the Original Code is Equivalence Pty. Ltd. * * Portions are Copyright (C) 1993 Free Software Foundation, Inc. * All Rights Reserved. * * Contributor(s): ______________________________________. * * $Revision: 21963 $ * $Author: rjongbloed $ * $Date: 2009-01-29 01:33:59 +0000 (Thu, 29 Jan 2009) $ */ #ifndef PTLIB_IPSOCKET_H #define PTLIB_IPSOCKET_H #ifdef P_USE_PRAGMA #pragma interface #endif #include #if P_QOS #ifdef _WIN32 #ifdef P_KNOCKOUT_WINSOCK2 #include "IPExport.h" #endif // KNOCKOUT_WINSOCK2 #endif // _WIN32 #endif // P_QOS class PIPSocketAddressAndPort; /**This class describes a type of socket that will communicate using the Internet Protocol. If P_HAS_IPV6 is not set, IPv4 only is supported. If P_HAS_IPV6 is set, both IPv4 and IPv6 adresses are supported, with IPv4 as default. This allows to transparently use IPv4, IPv6 or Dual stack operating systems. */ class PIPSocket : public PSocket { PCLASSINFO(PIPSocket, PSocket); protected: /**Create a new Internet Protocol socket based on the port number specified. */ PIPSocket(); public: /**A class describing an IP address. */ class Address : public PObject { public: /**@name Address constructors */ //@{ /// Create an IPv4 address with the default address: 127.0.0.1 (loopback). Address(); /**Create an IP address from string notation, eg dot notation x.x.x.x. for IPv4, or colon notation x:x:x::xxx for IPv6. */ Address(const PString & dotNotation); /// Create an IPv4 or IPv6 address from 4 or 16 byte values. Address(PINDEX len, const BYTE * bytes); /// Create an IP address from four byte values. Address(BYTE b1, BYTE b2, BYTE b3, BYTE b4); /// Create an IPv4 address from a four byte value in network byte order. Address(DWORD dw); /// Create an IPv4 address from an in_addr structure. Address(const in_addr & addr); #if P_HAS_IPV6 /// Create an IPv6 address from an in_addr structure. Address(const in6_addr & addr); #endif /// Create an IP (v4 or v6) address from a sockaddr (sockaddr_in, /// sockaddr_in6 or sockaddr_in6_old) structure. Address(const int ai_family, const int ai_addrlen,struct sockaddr *ai_addr); #ifdef __NUCLEUS_NET__ Address(const struct id_struct & addr); Address & operator=(const struct id_struct & addr); #endif /// Copy an address from another IP v4 address. Address & operator=(const in_addr & addr); #if P_HAS_IPV6 /// Copy an address from another IPv6 address. Address & operator=(const in6_addr & addr); #endif /// Copy an address from a string. Address & operator=(const PString & dotNotation); /// Copy an address from a four byte value in network order. Address & operator=(DWORD dw); //@} /// Compare two adresses for absolute (in)equality. Comparison Compare(const PObject & obj) const; bool operator==(const Address & addr) const { return Compare(addr) == EqualTo; } bool operator!=(const Address & addr) const { return Compare(addr) != EqualTo; } #if P_HAS_IPV6 bool operator==(in6_addr & addr) const; bool operator!=(in6_addr & addr) const { return !operator==(addr); } #endif bool operator==(in_addr & addr) const; bool operator!=(in_addr & addr) const { return !operator==(addr); } bool operator==(DWORD dw) const; bool operator!=(DWORD dw) const { return !operator==(dw); } #ifdef P_VXWORKS bool operator==(long unsigned int u) const { return operator==((DWORD)u); } bool operator!=(long unsigned int u) const { return !operator==((DWORD)u); } #endif #ifdef _WIN32 bool operator==(unsigned u) const { return operator==((DWORD)u); } bool operator!=(unsigned u) const { return !operator==((DWORD)u); } #endif #ifdef P_RTEMS bool operator==(u_long u) const { return operator==((DWORD)u); } bool operator!=(u_long u) const { return !operator==((DWORD)u); } #endif #ifdef P_BEOS bool operator==(in_addr_t a) const { return operator==((DWORD)a); } bool operator!=(in_addr_t a) const { return !operator==((DWORD)a); } #endif bool operator==(int i) const { return operator==((DWORD)i); } bool operator!=(int i) const { return !operator==((DWORD)i); } /// Compare two addresses for equivalence. This will return PTrue /// if the two addresses are equivalent even if they are IPV6 and IPV4. #if P_HAS_IPV6 bool operator*=(const Address & addr) const; #else bool operator*=(const Address & addr) const { return operator==(addr); } #endif /// Format an address as a string. PString AsString( bool bracketIPv6 = false ///< An IPv6 address is enclosed in []'s ) const; /// Convert string to IP address. Returns PTrue if was a valid address. PBoolean FromString( const PString & str ); /// Format an address as a string. operator PString() const; /// Return IPv4 address in network order. operator in_addr() const; #if P_HAS_IPV6 /// Return IPv4 address in network order. operator in6_addr() const; #endif /// Return IPv4 address in network order. operator DWORD() const; /// Return first byte of IPv4 address. BYTE Byte1() const; /// Return second byte of IPv4 address. BYTE Byte2() const; /// Return third byte of IPv4 address. BYTE Byte3() const; /// Return fourth byte of IPv4 address. BYTE Byte4() const; /// Return specified byte of IPv4 or IPv6 address. BYTE operator[](PINDEX idx) const; /// Get the address length (will be either 4 or 16). PINDEX GetSize() const; /// Get the pointer to IP address data. const char * GetPointer() const { return (const char *)&v; } /// Get the version of the IP address being used. unsigned GetVersion() const { return version; } /// Check address 0.0.0.0 or ::. PBoolean IsValid() const; PBoolean IsAny() const; /// Check address 127.0.0.1 or ::1. PBoolean IsLoopback() const; /// Check for Broadcast address 255.255.255.255. PBoolean IsBroadcast() const; /// Check if address is multicast group PBoolean IsMulticast() const; /** Check if the remote address is a private address. For IPV4 this is specified RFC 1918 as the following ranges: \li 10.0.0.0 - 10.255.255.255.255 \li 172.16.0.0 - 172.31.255.255 \li 192.168.0.0 - 192.168.255.255 For IPV6 this is specified as any address having "1111 1110 1" for the first nine bits. */ PBoolean IsRFC1918() const ; #if P_HAS_IPV6 /// Check for v4 mapped i nv6 address ::ffff:a.b.c.d. PBoolean IsV4Mapped() const; #endif static const Address & GetLoopback(int version = 4); static const Address & GetAny(int version = 4); static const Address GetBroadcast(int version = 4); protected: /// Runtime test of IP addresse type. union { in_addr four; #if P_HAS_IPV6 in6_addr six; #endif } v; unsigned version; /// Output IPv6 & IPv4 address as a string to the specified string. friend ostream & operator<<(ostream & s, const Address & a); /// Input IPv4 (not IPv6 yet!) address as a string from the specified string. friend istream & operator>>(istream & s, Address & a); }; //**@name Overrides from class PChannel */ //@{ /**Get the platform and I/O channel type name of the channel. For an IP socket this returns the host name of the peer the socket is connected to, followed by the socket number it is connected to. @return The name of the channel. */ virtual PString GetName() const; /**Set the default IP address familly. Needed as lot of IPv6 stack are not able to receive IPv4 packets in IPv6 sockets They are not RFC 2553, chapter 7.3, compliant. As a consequence, when opening a socket to listen to port 1720 (for example) from any remot host one must decide whether this is an IPv4 or an IPv6 socket... */ static int GetDefaultIpAddressFamily(); static void SetDefaultIpAddressFamily(int ipAdressFamily); // PF_INET, PF_INET6 static void SetDefaultIpAddressFamilyV4(); // PF_INET #if P_HAS_IPV6 static void SetDefaultIpAddressFamilyV6(); // PF_INET6 static PBoolean IsIpAddressFamilyV6Supported(); static void SetDefaultV6ScopeId(int scopeId); // local-link adresses require one static int GetDefaultV6ScopeId(); #endif static PIPSocket::Address GetDefaultIpAny(); /**Open an IPv4 or IPv6 socket */ virtual PBoolean OpenSocket( int ipAdressFamily=PF_INET ) = 0; //@} /**@name Overrides from class PSocket */ //@{ /**Connect a socket to a remote host on the specified port number. This is typically used by the client or initiator of a communications channel. This connects to a "listening" socket at the other end of the communications channel. The port number as defined by the object instance construction or the PIPSocket::SetPort() function. @return PTrue if the channel was successfully connected to the remote host. */ virtual PBoolean Connect( const PString & address ///< Address of remote machine to connect to. ); virtual PBoolean Connect( const Address & addr ///< Address of remote machine to connect to. ); virtual PBoolean Connect( WORD localPort, ///< Local port number for connection. const Address & addr ///< Address of remote machine to connect to. ); virtual PBoolean Connect( const Address & iface, ///< Address of local interface to us. const Address & addr ///< Address of remote machine to connect to. ); virtual PBoolean Connect( const Address & iface, ///< Address of local interface to us. WORD localPort, ///< Local port number for connection. const Address & addr ///< Address of remote machine to connect to. ); /**Listen on a socket for a remote host on the specified port number. This may be used for server based applications. A "connecting" socket begins a connection by initiating a connection to this socket. An active socket of this type is then used to generate other "accepting" sockets which establish a two way communications channel with the "connecting" socket. If the \p port parameter is zero then the port number as defined by the object instance construction or the PIPSocket::SetPort() function. For the UDP protocol, the \p queueSize parameter is ignored. @return PTrue if the channel was successfully opened. */ virtual PBoolean Listen( unsigned queueSize = 5, ///< Number of pending accepts that may be queued. WORD port = 0, ///< Port number to use for the connection. Reusability reuse = AddressIsExclusive ///< Can/Cant listen more than once. ); virtual PBoolean Listen( const Address & bind, ///< Local interface address to bind to. unsigned queueSize = 5, ///< Number of pending accepts that may be queued. WORD port = 0, ///< Port number to use for the connection. Reusability reuse = AddressIsExclusive ///< Can/Can't listen more than once. ); //@} /**@name New functions for class */ //@{ /**Get the "official" host name for the host specified or if none, the host this process is running on. The host may be specified as an IP number or a hostname alias and is resolved to the canonical form. @return Name of the host or IP number of host. */ static PString GetHostName(); static PString GetHostName( const PString & hostname ///< Hosts IP address to get name for. ); static PString GetHostName( const Address & addr ///< Hosts IP address to get name for. ); /**Get the Internet Protocol address for the specified host, or if none specified, for the host this process is running on. @return PTrue if the IP number was returned. */ static PBoolean GetHostAddress( Address & addr ///< Variable to receive hosts IP address. ); static PBoolean GetHostAddress( const PString & hostname, /* Name of host to get address for. This may be either a domain name or an IP number in "dot" format. */ Address & addr ///< Variable to receive hosts IP address. ); /**Get the alias host names for the specified host. This includes all DNS names, CNAMEs, names in the local hosts file and IP numbers (as "dot" format strings) for the host. @return Array of strings for each alias for the host. */ static PStringArray GetHostAliases( /**Name of host to get address for. This may be either a domain name or an IP number in "dot" format. */ const PString & hostname ); static PStringArray GetHostAliases( const Address & addr ///< Hosts IP address. /* Name of host to get address for. This may be either a domain name or an IP number in "dot" format. */ ); /**Determine if the specified host is actually the local machine. This can be any of the host aliases or multi-homed IP numbers or even the special number 127.0.0.1 for the loopback device. @return PTrue if the host is the local machine. */ static PBoolean IsLocalHost( /**Name of host to get address for. This may be either a domain name or an IP number in "dot" format. */ const PString & hostname ); /**Get the Internet Protocol address and port for the local host. @return PFalse (or empty string) if the IP number was not available. */ virtual PString GetLocalAddress(); virtual PBoolean GetLocalAddress( Address & addr ///< Variable to receive hosts IP address. ); virtual PBoolean GetLocalAddress( PIPSocketAddressAndPort & addr ///< Variable to receive hosts IP address and port. ); virtual PBoolean GetLocalAddress( Address & addr, ///< Variable to receive peer hosts IP address. WORD & port ///< Variable to receive peer hosts port number. ); /**Get the Internet Protocol address for the peer host and port the socket is connected to. @return PFalse (or empty string) if the IP number was not available. */ virtual PString GetPeerAddress(); virtual PBoolean GetPeerAddress( Address & addr ///< Variable to receive hosts IP address. ); virtual PBoolean GetPeerAddress( PIPSocketAddressAndPort & addr ///< Variable to receive hosts IP address and port. ); virtual PBoolean GetPeerAddress( Address & addr, ///< Variable to receive peer hosts IP address. WORD & port ///< Variable to receive peer hosts port number. ); /**Get the host name for the local host. @return Name of the host, or an empty string if an error occurs. */ PString GetLocalHostName(); /**Get the host name for the peer host the socket is connected to. @return Name of the host, or an empty string if an error occurs. */ PString GetPeerHostName(); /**Clear the name (DNS) cache. */ static void ClearNameCache(); /**Get the IP address that is being used as the gateway, that is, the computer that packets on the default route will be sent. The string returned may be used in the Connect() function to open that interface. Note that the driver does not need to be open for this function to work. @return PTrue if there was a gateway. */ static PBoolean GetGatewayAddress( Address & addr, ///< Variable to receive the IP address. int version = 4 ); /**Get the name for the interface that is being used as the gateway, that is, the interface that packets on the default route will be sent. The string returned may be used in the Connect() function to open that interface. Note that the driver does not need to be open for this function to work. @return String name of the gateway device, or empty string if there is none. */ static PString GetGatewayInterface(int version = 4); /**Get the interface address that will be used to reach the specified remote address. Uses longest prefix match when multiple matching interfaces are found. @return Network interface address. */ static PIPSocket::Address GetRouteInterfaceAddress(PIPSocket::Address remoteAddress); #ifdef _WIN32 /**Get the IP address for the interface that is being used as the gateway, that is, the interface that packets on the default route will be sent. This Function can be used to Bind the Listener to only the default Packet route in DHCP Environs. Note that the driver does not need to be open for this function to work. @return The Local Interface IP Address for Gatway Access. */ static PIPSocket::Address GetGatewayInterfaceAddress(int version = 4); /**Retrieve the Local IP Address for which packets would have be routed to the to reach the remote Address. @return Local Address. */ static PIPSocket::Address GetRouteAddress(PIPSocket::Address RemoteAddress); /**IP Address to a Numerical Representation. */ static unsigned AsNumeric(Address addr); /**Check if packets on Interface Address can reach the remote IP Address. */ static PBoolean IsAddressReachable(PIPSocket::Address LocalIP, PIPSocket::Address LocalMask, PIPSocket::Address RemoteIP); /**Get the Interface Name for a given local Interface Address. */ static PString GetInterface(PIPSocket::Address addr); //@} #endif /**Describe a route table entry. */ class RouteEntry : public PObject { PCLASSINFO(RouteEntry, PObject); public: /// Create a route table entry from an IP address. RouteEntry(const Address & addr) : network(addr) { } /// Get the network address associated with the route table entry. Address GetNetwork() const { return network; } /// Get the network address mask associated with the route table entry. Address GetNetMask() const { return net_mask; } /// Get the default gateway address associated with the route table entry. Address GetDestination() const { return destination; } /// Get the network address name associated with the route table entry. const PString & GetInterface() const { return interfaceName; } /// Get the network metric associated with the route table entry. long GetMetric() const { return metric; } protected: Address network; Address net_mask; Address destination; PString interfaceName; long metric; friend class PIPSocket; }; PARRAY(RouteTable, RouteEntry); /**Get the systems route table. @return PTrue if the route table is returned, PFalse if an error occurs. */ static PBoolean GetRouteTable( RouteTable & table ///< Route table ); /** Wait for a change in the route table or network interfaces. @return true if a change occurred, false if timed out or cancelled. */ static bool WaitForRouteTableChange( const PTimeInterval & timeout, ///< Timeout for wait PSyncPoint * cancellation = NULL ///< if sync point is signalled, wait is immediately terminated ); /**Describe an interface table entry. */ class InterfaceEntry : public PObject { PCLASSINFO(InterfaceEntry, PObject) public: /// Create an interface entry from a name, IP addr and MAC addr. InterfaceEntry(); InterfaceEntry( const PString & name, const Address & addr, const Address & mask, const PString & macAddr #if P_HAS_IPV6 , const PString & ip6Addr = PString::Empty() #endif ); /// Print to specified stream. virtual void PrintOn( ostream &strm // Stream to print the object into. ) const; /// Get the name of the interface. const PString & GetName() const { return name; } /// Get the address associated with the interface. Address GetAddress() const { return ipAddr; } PBoolean HasIP6Address() const #if ! P_HAS_IPV6 { return PFalse;} #else { return !ip6Addr.IsEmpty();} /// Get the address associated with the interface. Address GetIP6Address() const { return ip6Addr; } #endif /// Get the net mask associated with the interface. Address GetNetMask() const { return netMask; } /// Get the MAC address associate with the interface. const PString & GetMACAddress() const { return macAddr; } protected: PString name; Address ipAddr; Address netMask; PString macAddr; #if P_HAS_IPV6 PString ip6Addr; #endif }; PARRAY(InterfaceTable, InterfaceEntry); /**Get a list of all interfaces. @return PTrue if the interface table is returned, PFalse if an error occurs. */ static PBoolean GetInterfaceTable( InterfaceTable & table, ///< interface table PBoolean includeDown = PFalse ///< Include interfaces that are down ); /**Get the address of an interface that corresponds to a real network. @return PFalse if only loopback interfaces could be found, else PTrue. */ static PBoolean GetNetworkInterface(PIPSocket::Address & addr); #if P_HAS_RECVMSG /**Set flag to capture destination address for incoming packets. @return PTrue if host is able to capture incoming address, else PFalse. */ PBoolean SetCaptureReceiveToAddress() { if (!SetOption(IP_PKTINFO, 1, SOL_IP)) return PFalse; catchReceiveToAddr = PTrue; return PTrue; } /**Return the interface address of the last incoming packet. */ PIPSocket::Address GetLastReceiveToAddress() const { return lastReceiveToAddr; } protected: void SetLastReceiveAddr(void * addr, int addrLen) { if (addrLen == sizeof(in_addr)) lastReceiveToAddr = *(in_addr *)addr; } PIPSocket::Address lastReceiveToAddr; #else /**Set flag to capture interface address for incoming packets @return PTrue if host is able to capture incoming address, else PFalse */ PBoolean SetCaptureReceiveToAddress() { return PFalse; } /**Return the interface address of the last incoming packet. */ PIPSocket::Address GetLastReceiveToAddress() const { return PIPSocket::Address(); } #endif // Include platform dependent part of class #ifdef _WIN32 #include "msos/ptlib/ipsock.h" #else #include "unix/ptlib/ipsock.h" #endif }; class PIPSocketAddressAndPort { public: PIPSocketAddressAndPort() : m_port(0), m_separator(':') { } PIPSocketAddressAndPort(char separator) : m_port(0), m_separator(separator) { } PIPSocketAddressAndPort(const PString & str, WORD defaultPort = 0, char separator = ':') : m_port(defaultPort), m_separator(separator) { Parse(str, defaultPort, m_separator); } PBoolean Parse(const PString & str, WORD defaultPort = 0, char separator = ':'); PString AsString(char separator = 0) const { return m_address.AsString() + (separator ? separator : m_separator) + PString(PString::Unsigned, m_port); } void SetAddress( const PIPSocket::Address & addr, WORD port = 0 ); const PIPSocket::Address & GetAddress() const { return m_address; } WORD GetPort() const { return m_port; } protected: PIPSocket::Address m_address; WORD m_port; char m_separator; }; typedef std::vector PIPSocketAddressAndPortVector; #endif // PTLIB_IPSOCKET_H // End Of File ///////////////////////////////////////////////////////////////