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/*-*-c++-*-
* $Id$
*
* This file is part of plptools.
*
* Copyright (C) 1999 Philip Proudman <philip.proudman@btinternet.com>
* Copyright (C) 1999-2001 Fritz Elfert <felfert@to.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#ifndef _PPSOCKET_H_
#define _PPSOCKET_H_
#include <string>
#include <unistd.h>
#include <netdb.h>
#include <sys/socket.h>
#include <arpa/inet.h>
class bufferStore;
class IOWatch;
/**
* A class for dealing with sockets.
*/
class ppsocket
{
public:
/**
* Constructs a ppsocket
*/
ppsocket();
/**
* Copy constructor
*/
ppsocket(const ppsocket&);
/**
* Destructor
*/
virtual ~ppsocket();
/**
* Connects to a given host.
*
* @param Peer The Host to connect to (name or dotquad-string).
* @param PeerPort The port to connect to.
* @param Host The local address to bind to.
* @param HostPort The local port to bind to.
*
* @returns true on success, false otherwise.
*/
virtual bool connect(const char * const Peer, int PeerPort, const char * const Host = NULL, int HostPort = 0);
/**
* Reopens the connection after closing it.
*
* @returns true on success, false otherwise.
*/
virtual bool reconnect();
/**
* Retrieve a string representation of the ppsocket.
*
* @returns a string in the form "<host>:<hostport> -> <peer>:<peerport>"
* where elements not known, are replaced by "???" and none-existing
* elements are represented by the word "none".
*/
virtual std::string toString();
/**
* Starts listening.
*
* @param Host The local address to bind to.
* @param Port The local port to listen on.
*
* @returns true on success, false otherwise.
*/
virtual bool listen(const char * const Host, int Port);
/**
* Accept a connection.
*
* @param Peer If non-Null, the peer's name is returned here.
*
* @returns A pointer to a new instance for the accepted connection or NULL
* if an error happened.
*/
ppsocket *accept(std::string *Peer, IOWatch *);
/**
* Check and optionally wait for incoming data.
*
* @param sec Timeout in seconds
* @param usec Timeout in microseconds
*
* @returns true if data is available, false otherwise.
*/
bool dataToGet(int sec, int usec) const;
/**
* Receive data into a @ref bufferStore .
*
* @param a The bufferStore to fill with received data.
* @param wait If true, wait until something is received, else return
* if no data is available.
* @returns 1 if a bufferStore received, 0, if no bufferStore received, -1
* on error.
*/
int getBufferStore(bufferStore &a, bool wait = true);
/**
* Sends data from a @ref bufferStore .
*
* @param a The bufferStore to send.
* @returns true on success, false otherwise.
*/
bool sendBufferStore(const bufferStore &a);
/**
* Closes the connection.
*
* @returns true on success, false otherwise.
*/
bool closeSocket(void);
/**
* Binds to a local address and port.
*
* @param Host The local address to bind to.
* @param Port The local port to listen on.
*
* @returns true on success, false otherwise.
*/
bool bindSocket(const char * const Host, int Port);
/**
* Tries repeated binds to a local address and port.
* If @p Retries is <= @p High - @p Low, then
* the port to bind is randomly chosen in the given range.
* Otherwise, all ports starting from @p High up to @p Low
* are tried in sequence.
*
* @param Host The local address to bind to.
* @param Low The lowest local port to listen on.
* @param High The highest local port to listen on.
* @param Retries The number of retries until giving up.
*
* @returns true on success, false otherwise.
*/
bool bindInRange(const char * const Host, int Low, int High, int Retries);
/**
* Sets the linger parameter of the socket.
*
* @param LingerOn true, if lingering should be on.
* @param LingerTime If lingering is on, the linger-time.
*
* @returns true on success, false otherwise.
*/
bool linger(bool LingerOn, int LingerTime = 0);
/**
* Retrieves peer information.
*
* @param Peer The peers name is returned here.
* @param Port The peers port is returned here.
*
* @returns true on success, false otherwise.
*/
bool getPeer(std::string *Peer, int *Port);
/**
* Retrieves local information.
*
* @param Host The local name is returned here.
* @param Port The local port is returned here.
*
* @returns true on success, false otherwise.
*/
bool getHost(std::string *Host, int *Port);
/**
* Registers an @ref IOWatch for this socket.
* This IOWatch gets the socket added/removed
* automatically.
*
* @param watch The IOWatch to register.
*/
void setWatch(IOWatch *watch);
private:
/**
* Creates the socket.
*/
virtual bool createSocket(void);
int getLastError(void) { return(m_LastError); }
bool setPeer(const char * const Peer, int Port);
bool setHost(const char * const Host, int Port);
int recv(void *buf, int len, int flags);
int send(const void * const buf, int len, int flags);
struct sockaddr m_HostAddr;
struct sockaddr m_PeerAddr;
int m_Socket;
int m_Port;
bool m_Bound;
int m_LastError;
IOWatch *myWatch;
};
#endif
/*
* Local variables:
* c-basic-offset: 4
* End:
*/
|
