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/*
* Dibbler - a portable DHCPv6
*
* authors: Tomasz Mrugalski <thomson@klub.com.pl>
* Marek Senderski <msend@o2.pl>
*
* released under GNU GPL v2 only licence
*
*/
#include <iostream>
#include <stdlib.h>
#include "SmartPtr.h"
#include "DHCPClient.h"
#include "ClntTransMgr.h"
#include "IfaceMgr.h"
#include "ClntIfaceMgr.h"
#include "Logger.h"
#include "Portable.h"
using namespace std;
volatile int serviceShutdown;
volatile int linkstateChange;
TDHCPClient::TDHCPClient(const std::string& config)
:IsDone_(false)
{
serviceShutdown = 0;
linkstateChange = 0;
srand((uint32_t)time(NULL));
TClntIfaceMgr::instanceCreate(CLNTIFACEMGR_FILE);
if ( ClntIfaceMgr().isDone() ) {
Log(Crit) << "Fatal error during IfaceMgr initialization." << LogEnd;
IsDone_ = true;
return;
}
TClntCfgMgr::instanceCreate(config);
if ( ClntCfgMgr().isDone() ) {
Log(Crit) << "Fatal error during CfgMgr initialization." << LogEnd;
IsDone_ = true;
return;
}
TClntAddrMgr::instanceCreate(ClntCfgMgr().getDUID(), ClntCfgMgr().useConfirm(),
CLNTADDRMGR_FILE, false);
if ( ClntAddrMgr().isDone() ) {
Log(Crit) << "Fatal error during AddrMgr initialization." << LogEnd;
IsDone_ = true;
return;
}
TClntTransMgr::instanceCreate(CLNTTRANSMGR_FILE);
if ( TClntTransMgr::instance().isDone() ) {
Log(Crit) << "Fatal error during TransMgr initialization." << LogEnd;
IsDone_ = true;
return;
}
if ( !ClntTransMgr().sanitizeAddrDB() ) {
Log(Crit) << "Loaded address database failed sanitization checks."
<< LogEnd;
IsDone_ = true;
return;
}
if (ClntCfgMgr().useConfirm())
initLinkStateChange();
else
Log(Debug) << "Confirm disabled, skipping link change detection." << LogEnd;
}
/**
* initializes low-level link state change detection mechanism
*
*/
void TDHCPClient::initLinkStateChange()
{
// Log(Debug) << "LinkState change detection not fully supported (disabled for now)." << LogEnd;
// return; // disable this for now
memset((void*)&this->linkstates, 0, sizeof(linkstates));
ClntCfgMgr().firstIface();
SPtr<TClntCfgIface> iface;
Log(Debug) << "Initialising link-state detection for interfaces: ";
while (iface = ClntCfgMgr().getIface())
{
linkstates.ifindex[linkstates.cnt++] = iface->getID();
Log(Cont) << iface->getFullName() << " ";
}
Log(Cont) << LogEnd;
link_state_change_init(&linkstates, &linkstateChange);
}
void TDHCPClient::stop() {
serviceShutdown = 1;
#ifdef MOD_CLNT_CONFIRM
if (ClntCfgMgr().useConfirm())
link_state_change_cleanup();
#endif
#ifdef WIN32
// just to break select() in WIN32 systems
if (ClntTransMgr().getCtrlIface() < 0) {
return; // no interfaces configured yet
}
SPtr<TIfaceIface> iface = ClntIfaceMgr().getIfaceByID(ClntTransMgr().getCtrlIface());
Log(Warning) << "Sending SHUTDOWN packet on the " << iface->getName()
<< "/" << iface->getID() << " (addr=" << ClntTransMgr().getCtrlAddr() << ")." << LogEnd;
int fd = sock_add("", ClntTransMgr().getCtrlIface(),"::",0,true, false);
char buf = CONTROL_MSG;
int cnt = sock_send(fd,ClntTransMgr().getCtrlAddr(),&buf,1,DHCPCLIENT_PORT,ClntTransMgr().getCtrlIface());
if (cnt<0) {
Log(Error) << "Failed to send shutdown command" << LogEnd;
exit(EXIT_FAILURE);
}
sock_del(fd);
#endif
}
/* Function removed. Please use link_state_changed() instead */
/* void TDHCPClient::changeLinkstate(int iface_id) */
void TDHCPClient::resetLinkstate() {
linkstates.cnt = 0;
for (int i = 0; i<MAX_LINK_STATE_CHANGES_AT_ONCE; i++)
linkstates.ifindex[i]=0; // ugly, but safe way of zeroing table
linkstateChange = 0;
}
#ifdef MOD_CLNT_CONFIRM
void TDHCPClient::requestLinkstateChange(){
linkstateChange = 1;
}
#endif
char* TDHCPClient::getCtrlIface(){
SPtr<TIfaceIface> iface = ClntIfaceMgr().getIfaceByID(ClntTransMgr().getCtrlIface());
return iface->getName();
;
}
void TDHCPClient::run()
{
SPtr<TMsg> msg;
while ( (!this->isDone()) && !ClntTransMgr().isDone() )
{
if (serviceShutdown)
ClntTransMgr().shutdown();
#ifdef MOD_CLNT_CONFIRM
if (linkstateChange) {
ClntAddrMgr().setIA2Confirm(&linkstates);
this->resetLinkstate();
}
#endif
ClntTransMgr().doDuties();
unsigned int timeout = ClntTransMgr().getTimeout();
if (timeout == 0)
timeout = 1;
Log(Debug) << "Sleeping for " << timeout << " second(s)." << LogEnd;
SPtr<TClntMsg> msg=ClntIfaceMgr().select(timeout);
if (msg) {
int iface = msg->getIface();
SPtr<TIfaceIface> ptrIface;
ptrIface = ClntIfaceMgr().getIfaceByID(iface);
Log(Info) << "Received " << msg->getName() << " on " << ptrIface->getName()
<< "/" << iface << hex << ",trans-id=0x" << msg->getTransID()
<< dec << ", " << msg->countOption() << " opts:";
SPtr<TOpt> ptrOpt;
msg->firstOption();
while (ptrOpt = msg->getOption() )
Log(Cont) << " " << ptrOpt->getOptType();
Log(Cont) << LogEnd;
ClntTransMgr().relayMsg(msg);
}
}
Log(Notice) << "Bye bye." << LogEnd;
}
bool TDHCPClient::isDone() const {
return IsDone_;
}
bool TDHCPClient::checkPrivileges() {
/// @todo: check privileges
return true;
}
void TDHCPClient::setWorkdir(const std::string& workdir) {
ClntCfgMgr().setWorkdir(workdir);
ClntCfgMgr().dump();
}
TDHCPClient::~TDHCPClient()
{
}
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