File: svdrpclient.h

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/*                                                                  -*- c++ -*-
Copyright (C) 2004-2013 Christian Wieninger

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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
Or, point your browser to http://www.gnu.org/licenses/old-licenses/gpl-2.0.html

The author can be reached at cwieninger@gmx.de

The project's page is at http://winni.vdr-developer.org/epgsearch
*/

#ifndef __SVDRPCLIENT_H
#define __SVDRPCLIENT_H

#include <sys/socket.h>
#include "log.h"

#define SVDRPCONNECT 220
#define SVDRPDISCONNECT 221
#define CMDSUCCESS 250

class cSVDRPClient {
 private:
    int sock;
public:
    bool bConnected;

    cSVDRPClient()
	{
	    bConnected = false;
	    sock  = socket(PF_INET, SOCK_STREAM, 0);
	    if (sock < 0)
	    {
		LogFile.eSysLog("error creating socket!");
		return;
	    }

	    struct sockaddr_in AdrSock;
	    AdrSock.sin_family = AF_INET;
	    AdrSock.sin_port   = htons(EPGSearchConfig.SVDRPPort);
	    inet_aton("127.0.0.1", &AdrSock.sin_addr);

	    if (connect(sock, (struct sockaddr*)&AdrSock, sizeof(AdrSock)) == -1)
	    {
		LogFile.eSysLog("error connecting to socket!");
		return;
	    }
	    bConnected = (Receive() == SVDRPCONNECT);
	    if (!bConnected)
		LogFile.eSysLog("EPGSearch: could not connect to VDR!");
	}

    ~cSVDRPClient()
        {
	    if (sock >= 0)
	        close(sock);
	}

    bool SendCmd(const char* cmd)
	{
	    if (!bConnected)
		return false;

	    cString szCmd = cString::sprintf("%s\r\n", cmd);
	    Send(*szCmd);
	    bool cmdret = (Receive() == CMDSUCCESS);

	    szCmd = cString::sprintf("QUIT\r\n");
	    Send(szCmd);

	    long rc = 0;
	    if ((rc = Receive()) != SVDRPDISCONNECT)
		LogFile.eSysLog("could not disconnect (%ld)!", rc);

	    close(sock);
	    sock = -1;
	    return cmdret;
	}
    bool Send(const char* szSend)
	{
	    int length = strlen(szSend);
	    int sent = 0;
	    do
	    {
		sent += send(sock, szSend + sent, length - sent, 0);
		if( sent < 0 )
		{
		    LogFile.eSysLog("error sending command!");
		    return false;
		}
	    }
	    while ( sent < length );
	    return true;
	}
    long Receive()
	{
	    char* csResp = strdup("");
	    char ch;
	    long rc = 0;

	    bool bCheckMultiLine = true;

	    while(bCheckMultiLine)
	    {
		while( strlen(csResp) < 2 || strcmp(csResp + strlen(csResp) - 2, "\r\n") != 0)
		{
		    if (recv(sock, &ch, 1, 0 ) < 0)
		    {
			LogFile.eSysLog("EPGSearch: error receiving response!");
			free(csResp);
			return -1;
		    }
		    char* Temp = NULL;
		    msprintf(&Temp, "%s%c", csResp, ch);
		    free(csResp);
		    csResp = Temp;
		}
		if( csResp[3] == ' ' )
		{
		    bCheckMultiLine = false;
		    rc = atol(csResp);
		}
		free(csResp);
		csResp = strdup("");
	    }
	    free(csResp);
	    return rc;
	}

    static const char *SVDRPSendCmd;
};

#endif