aclfile.cxx

SIP（Session Initiation Protocol）是由IETF定义

/* ====================================================================
 * The Vovida Software License, Version 1.0 
 * 
 * Copyright (c) 2000 Vovida Networks, Inc.  All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 * 
 * 3. The names "VOCAL", "Vovida Open Communication Application Library",
 *    and "Vovida Open Communication Application Library (VOCAL)" must
 *    not be used to endorse or promote products derived from this
 *    software without prior written permission. For written
 *    permission, please contact [e-mail].
 *
 * 4. Products derived from this software may not be called "VOCAL", nor
 *    may "VOCAL" appear in their name, without prior written
 *    permission of Vovida Networks, Inc.
 * 
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 * ====================================================================
 * 
 * This software consists of voluntary contributions made by Vovida
 * Networks, Inc. and many individuals on behalf of Vovida Networks,
 * Inc.  For more information on Vovida Networks, Inc., please see
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static const char* const AclFile_cxx_Version =
    "$Id: AclFile.cxx,v 1.2 2002/09/26 01:14:03 bko Exp $";

#include "AclFile.hxx"
#include "NetworkAddress.h"
#include "cpLog.h"
#include <fstream>
#include "Lock.hxx"
#include <sys/stat.h>

using Vocal::Threads::Lock;

AclFile::AclFile(const char* filename)
{
    myFilename = filename;
}

void
AclFile::update()
{
    Lock x(myMutex);
    std::ifstream file;

    struct stat s;
    // stat the file and return true or false
    if(!::stat(myFilename.c_str(), &s))
    {
        // it's OK, so use the stat structure
        if(s.st_mtime > myLastMod)
        {
            cpLog(LOG_DEBUG, "reading ACL file");

            std::ifstream file(myFilename.c_str());
            if(!file)
            {
                cpLog(LOG_ERR, "unable to read ACL file %s", myFilename.c_str());
            }
            else
            {
                while(!file.eof())
                {
                    std::string buf, array[3];
            
                    int i = 0;
                    getline(file, buf);
                    // now, split buf into 3
                    unsigned int c;
                    while(i < 3 && (c = buf.find(":")) != string::npos)
                    {
                        cpLog(LOG_DEBUG_STACK, "line: %s", buf.c_str());
                        if(c != 0)
                        {
                            array[i] = buf.substr(0, c);
                            buf.erase(0, c + 1);
                            cpLog(LOG_DEBUG_STACK, "entry: %s", array[i].c_str());

                        }
                        buf.erase(static_cast<string::size_type>(0),
                                  static_cast<string::size_type>(0));

                        // needs to be here -- what if there is nothing before
                        // the : ?
                        i++; 

                        cpLog(LOG_DEBUG_STACK, "line: %s", buf.c_str());

                    }

                    if(i < 2)
                    {
                        array[i] = buf;
                        i++;
                    }

                    if(i == 1 || i == 2)
                    {
                        // this is an ok entry
                        AclFile::AclFileLevel level = AclNoAuth;

                        if(array[1] == "w")
                        {
                            level = AclFile::AclReadWrite;
                        }
                        else if(array[1] == "r")
                        {
                            level = AclFile::AclReadOnly;
                        }
                        else if(array[1] == "-")
                        {
                            level = AclFile::AclDenied;
                        }


                        if(array[0] != "")
                        {
                            cpLog(LOG_DEBUG, "adding address %s to ACL (%s)", 
                                  array[0].c_str(),
                                  array[1].c_str());
                            myAcls[array[0]] = level;
                        }
                    }
                    else
                    {
                        cpLog(LOG_ERR, "bad entry in ACL database");
                    }
                }

                cpLog(LOG_DEBUG, "successfully read ACL file");

                file.close();
                myLastMod = s.st_mtime;
            }
        }
    }
}


AclFile::AclFileLevel
AclFile::verify(std::string address)
{
    cpLog(LOG_DEBUG, "verifying ACL");

    update();

    std::map<std::string, AclFileLevel>::const_iterator i;

    i = myAcls.find(address);

    if(i != myAcls.end())
    {
        cpLog(LOG_DEBUG, "found IP address %s, returning %d", address.c_str(), 
              i->second);
        return i->second;
    }
    else 
    {
        cpLog(LOG_DEBUG, "could not find IP address %s", address.c_str());
	return AclFile::AclNoAuth;
    }
}


/* Local Variables: */
/* c-file-style: "stroustrup" */
/* indent-tabs-mode: nil */
/* c-file-offsets: ((access-label . -) (inclass . ++)) */
/* c-basic-offset: 4 */
/* End: */