/
wpasupplicantinstance.cpp
executable file
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/
wpasupplicantinstance.cpp
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/*
* <one line to give the program's name and a brief idea of what it does.>
* Copyright (C) 2013 <copyright holder> <email>
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*
*/
#include "wpasupplicantinstance.h"
#include "nl80211iface.h"
#include "routingmanager.h"
#include <sstream>
#include <unistd.h>
#include <stdlib.h>
#include <iostream>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/stat.h>
#include <net/if.h>
#include <arpa/inet.h>
#include <sys/ioctl.h>
#include <netinet/in.h>
#include <fstream>
#include <stdio.h>
#include <time.h>
#include "log.h"
void WPASupplicantInstance::dhcp_thread()
{
L->debug("DHCP Thread started for "+m_ifname);
//NL80211Iface iface(m_ifname); Netlink si scazza con il multithreading
RoutingManager rmgr;
while ( dhcp_thread_run )
{
if ( isconnected )
break;
L->debug(m_ifname+": Waiting for link...");
usleep(500000);
}
if ( !dhcp_thread_run )
return;
std::stringstream ss;
std::stringstream ss2;
ss2 << "/var/run/netbridge/dhclient_pid_" << rand() << rand() << rand() << rand() << ".pid";
pthread_mutex_lock(&dhcp_pidname_mutex);
m_dhcp_pid_file = ss2.str();
pthread_mutex_unlock(&dhcp_pidname_mutex);
ss << "dhclient " << m_ifname << " -pf " << ss2.str();
system(ss.str().c_str());
L->info(m_ifname+": DHCP Completed, setting up routes...");
rmgr.addDefaultRouteToIface(m_ifname,m_gateway,m_rtname);
rmgr.addTableMark(m_rtname,m_mark);
}
void WPASupplicantInstance::keepalive_thread()
{
NL80211Iface iface(m_ifname);
iface.connectVirtualIfaceTo(m_ifname,m_ssid,m_bssid);//La prima volta deve lanciare subito la connessione
struct timeval now;
struct timespec ts;
gettimeofday(&now,NULL);
ts.tv_sec = now.tv_sec;
ts.tv_nsec = now.tv_usec *1000;
ts.tv_sec += 10;
pthread_cond_timedwait(&keepalive_cond,&keepalive_mutex,&ts);
while ( keepalive_run)
{
if ( !iface.isConnected() )
{
L->warn(m_ifname+": Connection failed, retrying in 10 seconds...");
iface.connectVirtualIfaceTo(m_ifname,m_ssid,m_bssid);
}
gettimeofday(&now,NULL);
ts.tv_sec = now.tv_sec;
ts.tv_nsec = now.tv_usec *1000;
ts.tv_sec += 10;
pthread_cond_timedwait(&keepalive_cond,&keepalive_mutex,&ts);
}
}
WPASupplicantInstance::WPASupplicantInstance(std::string ifname, std::string ssid, std::string routing_table, std::string gateway, int mark)
{
std::stringstream confn;
m_ifname = ifname;
dhcp_thread_run = true;
m_rtname = routing_table;
m_gateway = gateway;
m_mark = mark;
isconnected = false;
keepalive_run = true;
if ( ssid.find(',') != ssid.npos )
{
m_bssid = ssid.substr(ssid.find(',')+1);
ssid = ssid.substr(0,ssid.find(','));
}
m_ssid = ssid;
/* std::stringstream ss2;
ss2 << "/var/run/netbridge/" << m_ifname << "ctrl_interface";
unlink(ss2.str().c_str());*/
pthread_mutex_init(&dhcp_pidname_mutex,NULL);
pthread_mutex_init(&keepalive_mutex,NULL);
pthread_cond_init(&keepalive_cond,NULL);
pthread_create(&dhcp_th,NULL,(void* (*)(void*))&WPASupplicantInstance::dhcp_thread,this);
pthread_create(&keepalive_th,NULL,(void* (*)(void*))&WPASupplicantInstance::keepalive_thread,this);
// confn << "/var/run/netbridge/" << ifname << ".conf";
/* std::ofstream ss(confn.str().c_str());
ss << "ctrl_interface=/var/run/netbridge/\n";
ss << "network={\n ssid=\"" << ssid << "\"\n key_mgmt=NONE";
if ( bssid.length() > 0 )
ss << "\n bssid=" << bssid;
ss << "\n}";
ss.close();
pid_t cp = fork();
if ( cp == 0 )
{
setsid();
std::stringstream iface;
iface << "-i" << ifname;
std::stringstream conf;
conf << "-c" << "/var/run/netbridge/" << ifname << ".conf";
int ret = execl("/usr/sbin/wpa_supplicant","wpa_supplicant","-onl80211",iface.str().c_str(),conf.str().c_str());
exit(ret);
}
std::cout << "Avviato wpa_supplicant, PID: " << cp << std::endl;*/
}
void WPASupplicantInstance::pollConnection()
{
NL80211Iface iface(m_ifname);
isconnected = iface.isConnected();
}
WPASupplicantInstance::~WPASupplicantInstance()
{
int status;
int pid;
pthread_mutex_lock(&dhcp_pidname_mutex);
FILE * f = fopen(m_dhcp_pid_file.c_str(),"r");
pthread_mutex_unlock(&dhcp_pidname_mutex);
if ( f )
{
fscanf(f,"%d",&pid);
std::stringstream ss;
ss << "Killing dhclient(" << pid << ")...";
L->debug(ss.str());
//std::cout << "Terminazione di dhclient... associato all'interfaccia " << m_ifname << "con pid " << pid << std::endl;
fclose(f);
kill(pid,SIGTERM);
}
pthread_mutex_lock(&dhcp_pidname_mutex);
unlink(m_dhcp_pid_file.c_str());
pthread_mutex_unlock(&dhcp_pidname_mutex);
dhcp_thread_run = false;
pthread_join(dhcp_th,NULL);
keepalive_run = false;
pthread_cond_broadcast(&keepalive_cond);
pthread_join(keepalive_th,NULL);
pthread_mutex_destroy(&dhcp_pidname_mutex);
pthread_mutex_destroy(&keepalive_mutex);
pthread_cond_destroy(&keepalive_cond);
L->info("Interface "+m_ifname+" destroyed");
}