273 lines
7.0 KiB
C++
273 lines
7.0 KiB
C++
/*
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* synergy -- mouse and keyboard sharing utility
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* Copyright (C) 2002 Chris Schoeneman
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*
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* This package is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* found in the file COPYING that should have accompanied this file.
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*
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* This package is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef CNETWORK_H
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#define CNETWORK_H
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#include "BasicTypes.h"
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#include "CString.h"
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#include "stdvector.h"
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#if !defined(HAVE_SOCKLEN_T)
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// Darwin is so unsure what to use for socklen_t it makes us choose
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# if defined(__APPLE__)
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# if !defined(_BSD_SOCKLEN_T_)
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# define _BSD_SOCKLEN_T_ int
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# endif
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# else
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typedef int socklen_t;
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# endif
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#endif
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#if WINDOWS_LIKE
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// declare no functions in winsock2
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# define INCL_WINSOCK_API_PROTOTYPES 0
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# define INCL_WINSOCK_API_TYPEDEFS 0
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# include <winsock2.h>
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typedef int ssize_t;
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# define SELECT_TYPE_ARG1 int
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# define SELECT_TYPE_ARG234 (fd_set *)
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# define SELECT_TYPE_ARG5 (struct timeval *)
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#endif
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#if UNIX_LIKE
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# if HAVE_SYS_TYPES_H
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# include <sys/types.h>
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# endif
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# if HAVE_SYS_SOCKET_H
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# include <sys/socket.h>
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# endif
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# if HAVE_POLL
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# include <sys/poll.h>
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# endif
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# include <netinet/in.h>
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# include <netdb.h>
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# include <errno.h>
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#endif
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//! Networking functions
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class CNetwork {
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public:
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// platform dependent types
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#if WINDOWS_LIKE
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typedef SOCKET Socket;
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typedef struct sockaddr Address;
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typedef int AddressLength;
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typedef short AddressType;
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typedef struct in_addr InternetAddress;
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#elif UNIX_LIKE
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typedef int Socket;
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typedef struct sockaddr Address;
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typedef socklen_t AddressLength;
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typedef int AddressType;
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typedef struct in_addr InternetAddress;
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#endif
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#if !HAVE_POLL
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class PollEntry {
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public:
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Socket fd;
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short events;
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short revents;
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};
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enum {
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kPOLLIN = 1,
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kPOLLOUT = 2,
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kPOLLERR = 4,
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kPOLLNVAL = 8
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};
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#else
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typedef struct pollfd PollEntry;
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enum {
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kPOLLIN = POLLIN,
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kPOLLOUT = POLLOUT,
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kPOLLERR = POLLERR,
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kPOLLNVAL = POLLNVAL
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};
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#endif
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//! Host name information
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class CHostInfo {
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public:
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CHostInfo() { }
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CHostInfo(const struct hostent*);
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void swap(CHostInfo&);
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public:
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typedef std::vector<CString> AliasList;
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typedef std::vector<const char*> AddressList;
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CString m_name;
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AliasList m_aliases;
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AddressType m_addressType;
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int m_addressLength;
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AddressList m_addresses;
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private:
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std::string m_addressData;
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};
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//! Network service information
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class CServiceInfo {
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public:
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CServiceInfo() { }
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CServiceInfo(const struct servent*);
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void swap(CServiceInfo&);
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public:
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typedef std::vector<CString> AliasList;
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CString m_name;
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AliasList m_aliases;
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int m_port;
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CString m_protocol;
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};
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//! Network protocol information
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class CProtocolInfo {
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public:
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CProtocolInfo() { }
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CProtocolInfo(const struct protoent*);
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void swap(CProtocolInfo&);
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public:
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typedef std::vector<CString> AliasList;
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CString m_name;
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AliasList m_aliases;
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int m_protocol;
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};
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//! @name manipulators
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//@{
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//! Initialize network subsystem
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/*!
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This \b must be called before any other calls to the network subsystem.
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*/
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static void init();
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//! Clean up network subsystem
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/*!
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This should be called when the network subsystem is no longer needed
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and no longer in use.
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*/
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static void cleanup();
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// byte swapping functions
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//! Swap bytes to network order
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static UInt32 swaphtonl(UInt32 hostlong);
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//! Swap bytes to network order
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static UInt16 swaphtons(UInt16 hostshort);
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//! Swap bytes to host order
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static UInt32 swapntohl(UInt32 netlong);
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//! Swap bytes to host order
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static UInt16 swapntohs(UInt16 netshort);
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//@}
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//! @name constants
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//@{
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//! The error type
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static const int Error;
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//! The non-socket
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static const Socket Null;
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// getsockerror() constants
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enum {
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#if WINDOWS_LIKE
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kEADDRINUSE = WSAEADDRINUSE,
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kECONNECTING = WSAEWOULDBLOCK,
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kEINTR = WSAEINTR,
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#elif UNIX_LIKE
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kEADDRINUSE = EADDRINUSE,
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kECONNECTING = EINPROGRESS,
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kEINTR = EINTR,
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#endif
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kNone = 0
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};
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// gethosterror() constants
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enum {
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#if WINDOWS_LIKE
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kHOST_NOT_FOUND = WSAHOST_NOT_FOUND,
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kNO_DATA = WSANO_DATA,
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kNO_RECOVERY = WSANO_RECOVERY,
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kTRY_AGAIN = WSATRY_AGAIN,
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#elif UNIX_LIKE
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kHOST_NOT_FOUND = HOST_NOT_FOUND,
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kNO_DATA = NO_DATA,
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kNO_RECOVERY = NO_RECOVERY,
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kTRY_AGAIN = TRY_AGAIN,
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#endif
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kHOST_OK = 0
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};
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//@}
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// socket interface (only available after init())
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static Socket accept(Socket s, Address* addr, AddressLength* addrlen);
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static int bind(Socket s, const Address* addr, AddressLength namelen);
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static int close(Socket s);
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static int connect(Socket s, const Address* name, AddressLength namelen);
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static int gethostname(char* name, int namelen);
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static int getpeername(Socket s, Address* name, AddressLength* namelen);
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static int getsockerror(void);
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static int getsockname(Socket s, Address* name, AddressLength* namelen);
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static int getsockopt(Socket s, int level, int optname, void* optval, AddressLength* optlen);
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static int inet_aton(const char* cp, InternetAddress* addr);
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static CString inet_ntoa(struct in_addr in);
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static int ioctl(Socket s, int cmd, void* );
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static int listen(Socket s, int backlog);
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static int poll(PollEntry[], int nfds, int timeout);
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static ssize_t read(Socket s, void* buf, size_t len);
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static ssize_t recv(Socket s, void* buf, size_t len, int flags);
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static ssize_t recvfrom(Socket s, void* buf, size_t len, int flags, Address* from, AddressLength* fromlen);
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static ssize_t send(Socket s, const void* buf, size_t len, int flags);
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static ssize_t sendto(Socket s, const void* buf, size_t len, int flags, const Address* to, AddressLength tolen);
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static int setsockopt(Socket s, int level, int optname, const void* optval, AddressLength optlen);
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static int shutdown(Socket s, int how);
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static Socket socket(int af, int type, int protocol);
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static ssize_t write(Socket s, const void* buf, size_t len);
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static int gethostbyaddr(CHostInfo* hostinfo, const char* addr, int len, int type);
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static int gethostbyname(CHostInfo* hostinfo, const char* name);
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static int getservbyport(CServiceInfo* servinfo, int port, const char* proto);
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static int getservbyname(CServiceInfo* servinfo, const char* name, const char* proto);
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static int getprotobynumber(CProtocolInfo* protoinfo, int proto);
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static int getprotobyname(CProtocolInfo* protoinfo, const char* name);
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// convenience functions (only available after init())
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//! Set socket to (non-)blocking operation
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static int setblocking(Socket s, bool blocking);
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//! Turn Nagle algorithm on or off on socket
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/*!
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Set socket to send messages immediately (true) or to collect small
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messages into one packet (false).
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*/
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static int setnodelay(Socket s, bool nodelay);
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private:
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#if WINDOWS_LIKE
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static void init2(HMODULE);
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#endif
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};
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#endif
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