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Code Issues Releases Wiki Activity

[5252] Corrected lease state and assigned stat when reusing expired-reclaimed via V6 request

Browse Source 
src/lib/dhcpsrv/alloc_engine.cc
    AllocEngine::updateLeaseData() - added logic to set lease state
    to default and increment assigned stat if the lease is expired-reclaimed

src/lib/dhcpsrv/tests/alloc_engine6_unittest.cc
    TEST_F(AllocEngine6Test, requestReuseDeclinedLease6Stats) - new test
    to verify the behavior
This commit is contained in:
Thomas Markwalder
2017-04-24 11:07:57 -04:00
parent c6522aa9c3
commit a63885a00d
2 changed files with 78 additions and 0 deletions
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16
src/lib/dhcpsrv/alloc_engine.cc
View File

@@ -1443,6 +1443,22 @@ AllocEngine::updateLeaseData(ClientContext6& ctx, const Lease6Collection& leases
lease->fqdn_rev_ = ctx.rev_dns_update_; lease->fqdn_rev_ = ctx.rev_dns_update_;
lease->hostname_ = ctx.hostname_; lease->hostname_ = ctx.hostname_;
if (!ctx.fake_allocation_) { if (!ctx.fake_allocation_) {
if (lease->state_ == Lease::STATE_EXPIRED_RECLAIMED) {
// Transition lease state to default (aka assigned)
lease->state_ = Lease::STATE_DEFAULT;
// If the lease is in the current subnet we need to account
// for the re-assignment of The lease.
if (ctx.subnet_->inPool(ctx.currentIA().type_, lease->addr_)) {
StatsMgr::instance().addValue(
StatsMgr::generateName("subnet", ctx.subnet_->getID(),
ctx.currentIA().type_ == Lease::TYPE_NA ?
"assigned-nas" : "assigned-pds"),
static_cast<int64_t>(1));
}
}
bool fqdn_changed = ((lease->type_ != Lease::TYPE_PD) && bool fqdn_changed = ((lease->type_ != Lease::TYPE_PD) &&
!(lease->hasIdenticalFqdn(**lease_it))); !(lease->hasIdenticalFqdn(**lease_it)));

62
src/lib/dhcpsrv/tests/alloc_engine6_unittest.cc
View File

@@ -1909,6 +1909,68 @@ TEST_F(AllocEngine6Test, requestReuseDeclinedLease6Stats) {
} }
// This test checks if an expired-reclaimed lease can be reused by
// a returning client via REQUEST, rather than renew/rebind. This
// would be typical of cable modem clients which do not retain lease
// data across reboots.
TEST_F(AllocEngine6Test, reuseReclaimedExpiredViaRequest) {
boost::scoped_ptr<AllocEngine> engine;
ASSERT_NO_THROW(engine.reset(new AllocEngine(AllocEngine::ALLOC_ITERATIVE, 100)));
ASSERT_TRUE(engine);
IOAddress addr("2001:db8:1::ad");
CfgMgr& cfg_mgr = CfgMgr::instance();
cfg_mgr.clear(); // Get rid of the default test configuration
// Create configuration similar to other tests, but with a single address pool
subnet_ = Subnet6Ptr(new Subnet6(IOAddress("2001:db8:1::"), 56, 1, 2, 3, 4));
pool_ = Pool6Ptr(new Pool6(Lease::TYPE_NA, addr, addr)); // just a single address
subnet_->addPool(pool_);
cfg_mgr.getStagingCfg()->getCfgSubnets6()->add(subnet_);
cfg_mgr.commit();
// Verify relevant stats are zero.
EXPECT_TRUE(testStatistics("assigned-nas", 0, subnet_->getID()));
EXPECT_TRUE(testStatistics("reclaimed-leases", 0));
EXPECT_TRUE(testStatistics("reclaimed-leases", 0, subnet_->getID()));
// Let's create an expired lease
Lease6Ptr lease(new Lease6(Lease::TYPE_NA, addr, duid_, iaid_,
501, 502, 503, 504, subnet_->getID(), HWAddrPtr(),
0));
lease->cltt_ = time(NULL) - 500; // Allocated 500 seconds ago
lease->valid_lft_ = 495; // Lease was valid for 495 seconds
lease->fqdn_fwd_ = true;
lease->fqdn_rev_ = true;
lease->hostname_ = "myhost.example.com.";
lease->state_ = Lease::STATE_EXPIRED_RECLAIMED;
ASSERT_TRUE(LeaseMgrFactory::instance().addLease(lease));
// Same client comes along and issues a request
AllocEngine::ClientContext6 ctx(subnet_, duid_, false, false, "", false,
Pkt6Ptr(new Pkt6(DHCPV6_REQUEST, 1234)));
EXPECT_NO_THROW(lease = expectOneLease(engine->allocateLeases6(ctx)));
// Check that he got the orginal lease back.
ASSERT_TRUE(lease);
EXPECT_EQ(addr, lease->addr_);
// Check that the lease is indeed updated in LeaseMgr
Lease6Ptr from_mgr = LeaseMgrFactory::instance().getLease6(Lease::TYPE_NA,
addr);
ASSERT_TRUE(from_mgr);
// Now check that the lease in LeaseMgr has the same parameters
detailCompareLease(lease, from_mgr);
// Verify assigned-nas got bumped. Reclaimed stats should still
// be zero as we artifically marked it reclaimed.
EXPECT_TRUE(testStatistics("assigned-nas", 1, subnet_->getID()));
EXPECT_TRUE(testStatistics("reclaimed-leases", 0));
EXPECT_TRUE(testStatistics("reclaimed-leases", 0, subnet_->getID()));
}
}; // namespace test }; // namespace test
}; // namespace dhcp }; // namespace dhcp
}; // namespace isc }; // namespace isc