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|
/*
* radiusplugin -- An OpenVPN plugin for do radius authentication
* and accounting.
*
* Copyright (C) 2005 EWE TEL GmbH/Ralf Luebben <ralfluebben@gmx.de>
*
* 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
* 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 St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "AccountingProcess.h"
/** This method is the background process for accounting. It is in a endless loop
* until it gets a exit command. In the loop the process is
* waiting for a command from the foregroundprocess (USER_ADD, USER_DEL, EXIT).
* If no command is arrived in an interval of 0,5s the accounting is done
* for all users who need a update. The interval is 0,5s because every second
* a user can connect with an unknown interval, so this interval must be shorter.
* @param context The plugin context as object from the class PluginContext.
*/
void AccountingProcess::Accounting(PluginContext * context)
{
UserAcct *user=NULL; //The user for acconting.
int command, //The command from foreground process.
result; //The result from the socket.
string key; //The unique key.
AcctScheduler scheduler; //The scheduler for the accounting.
fd_set set; //A set for the select function.
struct timeval tv; //A timeinterval for the select funtion.
//Tell the parent everythink is ok.
try
{
context->acctsocketforegr.send(RESPONSE_INIT_SUCCEEDED);
}
catch (Exception &e)
{
cerr << getTime() << "RADIUS-PLUGIN: BACKGROUND-ACCT:" << e <<"\n";
goto done;
}
if (DEBUG (context->getVerbosity()))
cerr << getTime() << "RADIUS-PLUGIN: BACKGROUND ACCT: Started, RESPONSE_INIT_SUCCEEDED was sent to Foreground Process.\n";
// Event loop
while (1)
{
//create the informations for the result function
tv.tv_sec = 0;
tv.tv_usec = 500000; //wait 0,5s
FD_ZERO(&set); // clear out the set
FD_SET(context->acctsocketforegr.getSocket(), &set); // wait only on the socket from the foreground process
result = select(FD_SETSIZE, &set, NULL, NULL, &tv);
//if there is a data on the socket
if (result>0)
{
// get a command from foreground process
command = context->acctsocketforegr.recvInt();
if (DEBUG (context->getVerbosity()))
cerr << getTime() << "RADIUS-PLUGIN: BACKGROUND ACCT: Get a command.\n";
switch (command)
{
//add a new user to the scheduler
case ADD_USER:
try
{
if (DEBUG (context->getVerbosity()))
cerr << getTime() << "RADIUS-PLUGIN: BACKGROUND ACCT: New User.\n";
//allocate memory
user= new UserAcct;
//get the information from the foreground process
user->setUsername(context->acctsocketforegr.recvStr());
user->setSessionId(context->acctsocketforegr.recvStr()) ;
user->setDev(context->acctsocketforegr.recvStr()) ;
user->setPortnumber(context->acctsocketforegr.recvInt());
user->setCallingStationId(context->acctsocketforegr.recvStr());
user->setFramedIp(context->acctsocketforegr.recvStr());
user->setFramedIp6(context->acctsocketforegr.recvStr());
user->setCommonname(context->acctsocketforegr.recvStr());
user->setAcctInterimInterval(context->acctsocketforegr.recvInt());
user->setFramedRoutes(context->acctsocketforegr.recvStr());
user->setFramedRoutes6(context->acctsocketforegr.recvStr());
user->setKey(context->acctsocketforegr.recvStr());
user->setStatusFileKey(context->acctsocketforegr.recvStr());
user->setUntrustedPort(context->acctsocketforegr.recvStr());
context->acctsocketforegr.recvBuf(user);
if (DEBUG (context->getVerbosity()))
cerr << getTime() << "RADIUS-PLUGIN: BACKGROUND ACCT: New user acct: username: " << user->getUsername() << ", interval: " << user->getAcctInterimInterval() << ", calling station: " << user->getCallingStationId() << ", commonname: " << user->getCommonname() << ", framed ip: " << user->getFramedIp() << ", framed ipv6: " << user->getFramedIp6() <<".\n";
//set the starttime
user->setStarttime(time(NULL));
//calculate the nextupdate
user->setNextUpdate(user->getStarttime()+user->getAcctInterimInterval());
//send the start packet
if (user->sendStartPacket(context)==0)
{
if (DEBUG (context->getVerbosity()))
cerr << getTime() << "RADIUS-PLUGIN: BACKGROUND ACCT: Start packet was send.\n";
if (DEBUG (context->getVerbosity()))
cerr << getTime() << "RADIUS-PLUGIN: BACKGROUND ACCT: User was added to accounting scheduler.\n";
//set the system routes
user->addSystemRoutes(context);
string script = context->conf.getVsaScript();
//execute vendor specific attribute script
if(script.length() > 0)
{
if (DEBUG (context->getVerbosity()))
cerr << getTime() << "RADIUS-PLUGIN: BACKGROUND ACCT: Call vendor specific attribute script.\n";
if(callVsaScript(context, user, 1, 0) != 0)
{
throw Exception("Vendor specific attribute script failed.\n");
}
}
//add the user to the scheduler
scheduler.addUser(user);
//send the ok to the parent process
context->acctsocketforegr.send(RESPONSE_SUCCEEDED);
}
else
{
//delete the ccd file which was created at authentication
//user->deleteCcdFile(context);
//tell the parent parent process something is wrong
throw Exception("Start packet couldn't send.\n");
}
// free the user, he was copied to the accounting scheduler list
}
catch (Exception &e)
{
cerr << getTime() << "RADIUS-PLUGIN: BACKGROUND ACCT: "<< e << "!\n";
context->acctsocketforegr.send(RESPONSE_FAILED);
//close the background process, if the ipc socket is bad
if (e.getErrnum()==Exception::SOCKETSEND || e.getErrnum()==Exception::SOCKETRECV)
{
cerr << getTime() << "RADIUS-PLUGIN: BACKGROUND ACCT: Error in socket!\n";
goto done;
}
}
catch (...)
{
context->acctsocketforegr.send(RESPONSE_FAILED);
cerr << getTime() << "RADIUS-PLUGIN: BACKGROUND ACCT: Unknown Exception!\n";
}
delete user;
break;
//delete a user
case DEL_USER:
if (DEBUG (context->getVerbosity()))
cerr << getTime() << "RADIUS-PLUGIN: BACKGROUND-ACCT: Delete user from accounting.\n";
//receive the information
try
{
key=context->acctsocketforegr.recvStr();
}
catch(Exception &e)
{
cerr << getTime() << "RADIUS-PLUGIN: BACKGROUND ACCT: "<< e << "!\n";
//close the background process, if the ipc socket is bad
if (e.getErrnum()==Exception::SOCKETSEND || e.getErrnum()==Exception::SOCKETRECV)
{
goto done;
}
}
catch (...)
{
cerr << getTime() << "RADIUS-PLUGIN: BACKGROUND ACCT: Unknown Exception!\n";
}
//find the user, he must be already there
user=scheduler.findUser(key.c_str());
if (user)
{
if (DEBUG (context->getVerbosity()))
cerr << getTime() << "RADIUS-PLUGIN: BACKGROUND ACCT: Stop acct: username: " << user->getUsername()<< ", calling station: " << user->getCallingStationId()<< ", commonname: " << user->getCommonname() << ".\n";
//delete the system routes
user->delSystemRoutes(context);
//delete the ccd file which was created at authentication
//user->deleteCcdFile(context);
string script = context->conf.getVsaScript();
//execute vendor specific attribute script
if(script.length() > 0)
{
//string command= context->conf.getVsaScript() + string(" ") + string("ACTION=CLIENT_CONNECT")+string(" ")+string("USERNAME=")+user->getUsername()+string(" ")+string("COMMONNAME=")+user->getCommonname()+string(" ")+string("UNTRUSTED_IP=")+user->getCallingStationId() + string(" ") + string("UNTRUSTED_PORT=") + user->getUntrustedPort() + user->getVsaString();
if (DEBUG (context->getVerbosity()))
cerr << getTime() << "RADIUS-PLUGIN: BACKGROUND ACCT: Call vendor specific attribute script.\n";
if(callVsaScript(context, user, 2, 0) != 0)
{
throw Exception("Vendor specific attribute script failed.\n");
}
}
try
{
//delete the user from the accounting scheduler
scheduler.delUser(context, user);
if (DEBUG (context->getVerbosity()))
cerr << getTime() << "RADIUS-PLUGIN: BACKGROUND ACCT: User with key: " << key << " was deleted from accouting.\n";
//send the parent process the ok
context->acctsocketforegr.send(RESPONSE_SUCCEEDED);
}
catch(Exception &e)
{
cerr << getTime() << "RADIUS-PLUGIN: BACKGROUND-ACCT: " << e << "\n";
goto done;
}
catch (...)
{
cerr << getTime() << "RADIUS-PLUGIN: BACKGROUND ACCT: Unknown Exception!\n";
}
}
else
{
cerr << getTime() << "RADIUS-PLUGIN: BACKGROUND ACCT: No user with this key "<< key <<".\n";
context->acctsocketforegr.send(RESPONSE_FAILED);
}
break;
//exit the loop
case COMMAND_EXIT:
if (DEBUG (context->getVerbosity()))
cerr << getTime() << "RADIUS-PLUGIN: BACKGROUND-ACCT: Get command exit.\n";
goto done;
case -1:
cerr << getTime() << "RADIUS-PLUGIN: BACKGROUND: read error on command channel.\n";
break;
default:
cerr << getTime() << "RADIUS-PLUGIN: BACKGROUND: unknown command code: code= "<< command <<", exiting.\n";
goto done;
}
}
//after 0,5sec without a command call the scheduler
scheduler.doAccounting(context);
}
done:
//end the process
if(1)
scheduler.delallUsers(context);
cerr << getTime() << "RADIUS-PLUGIN: BACKGROUND ACCT: EXIT\n";
return;
}
/** This method executes the program for the vendor specific attributes and pass
* attributes to the program and vendor specific attributes as a buffer
* to the program.
* Attributes Code for decoding
*
* string username => 101
* string commonname => 102
* string framedip => 103
* string callingstationid => 104
* string untrustedport => 105
* string framedroutes => 106
* Octet vsabuf => 107
* The code is used for decoding in the additional program. The vsabuf must be decode also in the program.
* Example: vsascript.pl
* @param context The PluginContext
* @param user The user for which the script is executed.
* @param action Action: 0 => Authentication, 1 => Client-Connect, 2 => Client-Disconnect
* @param rekeying If equal 1 this is a rekeying.
* @return -1 in case of error, else 0
*/
int AccountingProcess::callVsaScript(PluginContext * context, User * user, unsigned int action, unsigned int rekeying)
{
char * route;
int buflen = 3 * sizeof(int);
if (user->getUsername().length() != 0)
{
buflen=buflen+user->getUsername().length()+2*sizeof(int);
}
if (user->getCommonname().length() != 0)
{
buflen=buflen+user->getCommonname().length()+2*sizeof(int);
}
if (user->getFramedIp().length() != 0)
{
buflen=buflen+user->getFramedIp().length()+2*sizeof(int);
}
if (user->getCallingStationId().length() != 0)
{
buflen=buflen+user->getCallingStationId().length()+2*sizeof(int);
}
if (user->getUntrustedPort().length() != 0)
{
buflen=buflen+user->getUntrustedPort().length()+2*sizeof(int);
}
if (user->getVsaBufLen() != 0)
{
buflen=buflen+user->getVsaBufLen() +2*sizeof(int);
}
char routes[user->getFramedRoutes().length()+1];
strncpy(routes, user->getFramedRoutes().c_str(), user->getFramedRoutes().length());
routes[user->getFramedRoutes().length()]=0;
if((route = strtok(routes,";")) != NULL)
{
buflen=buflen+strlen(route)+2*sizeof(int);
while((route = strtok(NULL,";"))!= NULL)
{
buflen=buflen+strlen(route)+2*sizeof(int);
}
}
Octet * buf = new Octet[buflen];
unsigned int value = htonl(action);
memcpy(buf,&value, 4);
value = htonl(rekeying);
memcpy(buf+4,&value, 4);
value = htonl(buflen);
memcpy(buf+8,&value, 4);
int i=12;
if (user->getUsername().length() != 0)
{
value = htonl(101);
memcpy(buf+i,&value, 4);
i+=4;
value = htonl(user->getUsername().length());
memcpy(buf+i,&value, 4);
i+=4;
memcpy( buf+i, user->getUsername().c_str(),user->getUsername().length());
i=i+user->getUsername().length();
}
if (user->getCommonname().length() != 0)
{
value = htonl(102);
memcpy(buf+i,&value, 4);
i+=4;
value = htonl(user->getCommonname().length());
memcpy(buf+i,&value, 4);
i+=4;
memcpy( buf+i, user->getCommonname().c_str(),user->getCommonname().length());
i=i+user->getCommonname().length();
}
if (user->getFramedIp().length() != 0)
{
value = htonl(103);
memcpy(buf+i,&value, 4);
i+=4;
value = htonl(user->getFramedIp().length());
memcpy(buf+i,&value, 4);
i+=4;
memcpy( buf+i, user->getFramedIp().c_str(),user->getFramedIp().length());
i=i+user->getFramedIp().length();
}
if (user->getCallingStationId().length() != 0)
{
value = htonl(104);
memcpy(buf+i,&value, 4);
i+=4;
value = htonl(user->getCallingStationId().length());
memcpy(buf+i,&value, 4);
i+=4;
memcpy( buf+i, user->getCallingStationId().c_str(),user->getCallingStationId().length());
i=i+user->getCallingStationId().length();
}
if (user->getUntrustedPort().length() != 0)
{
value = htonl(105);
memcpy(buf+i,&value, 4);
i+=4;
value = htonl(user->getUntrustedPort().length());
memcpy(buf+i,&value, 4);
i+=4;
memcpy( buf+i, user->getUntrustedPort().c_str(),user->getUntrustedPort().length());
i=i+user->getUntrustedPort().length();
}
strncpy(routes, user->getFramedRoutes().c_str(), user->getFramedRoutes().length());
routes[user->getFramedRoutes().length()]=0;
if((route = strtok(routes,";")) != NULL)
{
value = htonl(106);
memcpy(buf+i,&value, 4);
i+=4;
value = htonl(strlen(route));
memcpy(buf+i,&value, 4);
i+=4;
memcpy(buf+i, route, strlen(route));
i=i+strlen(route);
while((route = strtok(NULL,";"))!= NULL)
{
value = htonl(106);
memcpy(buf+i,&value, 4);
i+=4;
value = htonl(strlen(route));
memcpy(buf+i,&value, 4);
i+=4;
memcpy(buf+i, route, strlen(route));
i=i+strlen(route);
}
}
if (user->getVsaBufLen() != 0)
{
value = htonl(107);
memcpy(buf+i,&value, 4);
i+=4;
value = htonl(user->getVsaBufLen());
memcpy(buf+i,&value, 4);
i+=4;
memcpy(buf+i, user->getVsaBuf(),user->getVsaBufLen());
i=i+user->getVsaBufLen();
}
if(mkfifo(context->conf.getVsaNamedPipe().c_str(), 0600)== -1)
{
/* FIFO bereits vorhanden - kein fataler Fehler */
if(errno == EEXIST)
{
cerr << getTime() << "RADIUS-PLUGIN:FIFO already exist.";
}
else
{
cerr << getTime() <<"RADIUS-PLUGIN: Error in mkfifio()";
return -1;
}
}
int fd_fifo=open(context->conf.getVsaNamedPipe().c_str(), O_RDWR | O_NONBLOCK);
if (fd_fifo == -1)
{
cerr << getTime() <<"RADIUS-PLUGIN: Error in opening pipe to VSAScript.";
return -1;
}
string exe=string(context->conf.getVsaScript()) + " " + string(context->conf.getVsaNamedPipe());
if (write (fd_fifo, buf, buflen) != buflen)
{
close(fd_fifo);
cerr << getTime() << "RADIUS-PLUGIN: Could not write in Pipe to VSAScript!";
return -1;
}
if(system(exe.c_str())!=0)
{
close(fd_fifo);
cerr << getTime() << "RADIUS-PLUGIN: Error in VSAScript!";
return -1;
}
close(fd_fifo);
delete [] buf;
return 0;
}
|
