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Separated the TTL so that invalid sessions can be expired faster than valid sessions (DDOS protection and better error handling)

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This commit is contained in:
John Sharratt 2017-07-01 10:21:14 +02:00
parent aaaed4fce9
commit 68240908bc
4 changed files with 23 additions and 4 deletions
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5
src/ndppd.cc
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@ -169,6 +169,11 @@ static bool configure(ptr<conf>& cf)
pr->ttl(30000);
else
pr->ttl(*x_cf);
if (!(x_cf = pr_cf->find("deadtime")))
pr->deadtime(pr->ttl());
else
pr->deadtime(*x_cf);
if (!(x_cf = pr_cf->find("timeout")))
pr->timeout(500);

12
src/proxy.cc
View File

@ -30,7 +30,7 @@ NDPPD_NS_BEGIN
std::list<ptr<proxy> > proxy::_list;
proxy::proxy() :
_router(true), _ttl(30000), _timeout(500), _autowire(false)
_router(true), _ttl(30000), _deadtime(3000), _timeout(500), _autowire(false)
{
}
@ -197,6 +197,16 @@ void proxy::ttl(int val)
_ttl = (val >= 0) ? val : 30000;
}
int proxy::deadtime() const
{
return _deadtime;
}
void proxy::deadtime(int val)
{
_deadtime = (val >= 0) ? val : 30000;
}
int proxy::timeout() const
{
return _timeout;

6
src/proxy.h
View File

@ -60,6 +60,10 @@ public:
int ttl() const;
void ttl(int val);
int deadtime() const;
void deadtime(int val);
private:
static std::list<ptr<proxy> > _list;
@ -76,7 +80,7 @@ private:
bool _autowire;
int _ttl, _timeout;
int _ttl, _deadtime, _timeout;
proxy();
};

4
src/session.cc
View File

@ -45,7 +45,7 @@ void session::update_all(int elapsed_time)
case session::WAITING:
logger::debug() << "session is now invalid";
se->_status = session::INVALID;
se->_ttl = se->_pr->ttl();
se->_ttl = se->_pr->deadtime();
break;
default:
@ -81,7 +81,7 @@ ptr<session> session::create(const ptr<proxy>& pr, const address& saddr,
logger::debug()
<< "session::create() pr=" << logger::format("%x", (proxy* )pr) << ", saddr=" << saddr
<< ", daddr=" << daddr << ", taddr=" << taddr << ", autowire=" << (_autowire ? "yes" : "no") << " =" << logger::format("%x", (session* )se);
<< ", daddr=" << daddr << ", taddr=" << taddr << ", autowire=" << (auto_wire == true ? "yes" : "no") << " =" << logger::format("%x", (session* )se);
return se;
}