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[#226] Finished v6 code

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This commit is contained in:
Francis Dupont 2025-08-13 19:00:33 +02:00
parent 45799e22bf
commit 3776e08a16
3 changed files with 271 additions and 178 deletions
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329
src/bin/dhcp6/tests/flq_unittest.cc
View File

@ -27,8 +27,8 @@ std::string FLQ_CONFIG =
"\"preferred-lifetime\": 200,"
"\"max-preferred-lifetime\": 300,"
"\"min-valid-lifetime\": 400,"
"\"valid-lifetime\": 500,"
"\"max-valid-lifetime\": 600,"
"\"valid-lifetime\": 600,"
"\"max-valid-lifetime\": 700,"
"\"rebind-timer\": 250,"
"\"renew-timer\": 250,"
"\"adaptive-lease-time-threshold\": .5,"
@ -99,8 +99,8 @@ TEST_F(FLQTest, empty) {
// Preferred lifetime should be the config preferred-lifetime (200).
EXPECT_EQ(200, lease->preferred_lft_);
// Valid lifetime should be the config valid-lifetime (500).
EXPECT_EQ(500, lease->valid_lft_);
// Valid lifetime should be the config valid-lifetime (600).
EXPECT_EQ(600, lease->valid_lft_);
}
// Test allocation with almost full pool.
@ -247,190 +247,273 @@ TEST_F(FLQTest, reclaimed) {
// Valid lifetime should be the config min-valid-lifetime (400).
EXPECT_EQ(400, lease->valid_lft_);
}
#if 0
// Test renewal with almost empty pool.
TEST_F(FLQTest, renew) {
Dhcp6Client client(srv_, Dhcp6Client::SELECTING);
Dhcp6Client client(srv_);
// Configure DHCP server.
configure(FLQ_CONFIG, *client.getServer());
// Obtain a lease from the server using the 4-way exchange.
boost::shared_ptr<IOAddress> hint(new IOAddress("10.0.0.14"));
ASSERT_NO_THROW(client.doDORA(hint));
// Perform 4-way exchange with the server requesting the last prefix.
client.requestPrefix(1, 51, IOAddress("2001:db8:1:e000::"));
ASSERT_NO_THROW(client.doSARR());
// Make sure that the server responded.
Pkt6Ptr resp = client.getContext().response_;
ASSERT_TRUE(resp);
// Server should have assigned a prefix.
ASSERT_EQ(1, client.getLeaseNum());
Lease6Ptr lease = checkLease(client.getLease(0));
ASSERT_TRUE(lease);
// Make sure that the server has responded with DHCPACK.
ASSERT_EQ(DHCPACK, static_cast<int>(resp->getType()));
// Make sure that the client has got the requested prefix.
EXPECT_EQ("2001:db8:1:e000::", lease->addr_.toText());
EXPECT_EQ(51, lease->prefixlen_);
// Make sure that the client has got the requested address.
EXPECT_EQ(*hint, resp->getYiaddr());
// Preferred lifetime should be the config preferred-lifetime (200).
EXPECT_EQ(200, lease->preferred_lft_);
// Valid lifetime should be the valid-lifetime parameter value (200).
OptionUint32Ptr opt = boost::dynamic_pointer_cast<
OptionUint32>(resp->getOption(DHO_DHCP_LEASE_TIME));
ASSERT_TRUE(opt);
EXPECT_EQ(200, opt->getValue());
// Valid lifetime should be the config valid-lifetime (600).
EXPECT_EQ(600, lease->valid_lft_);
// Age the lease.
lease->cltt_ -= 1000;
lease->current_cltt_ -= 1000;
auto& lease_mgr = LeaseMgrFactory::instance();
Lease6Ptr lease = lease_mgr.getLease6(*hint);
ASSERT_TRUE(lease);
lease->cltt_ -= 150;
lease->current_cltt_ -= 150;
EXPECT_NO_THROW(lease_mgr.updateLease6(lease));
// Let's transition the client to Renewing state.
client.setState(Dhcp6Client::RENEWING);
// Send the renew message to the server.
ASSERT_NO_THROW(client.doRenew());
// Set the unicast destination address to indicate that it is a renewal.
client.setDestAddress(IOAddress("10.0.0.1"));
ASSERT_NO_THROW(client.doRequest());
// Server should have renewed the prefix.
ASSERT_EQ(1, client.getLeaseNum());
Lease6Ptr renewed = checkLease(client.getLease(0));
ASSERT_TRUE(renewed);
// Make sure that renewal was ACKed.
resp = client.getContext().response_;
ASSERT_TRUE(resp);
ASSERT_EQ(DHCPACK, static_cast<int>(resp->getType()));
// Make sure that the client has got the same prefix.
EXPECT_EQ(lease->addr_, renewed->addr_);
EXPECT_EQ(lease->prefixlen_, renewed->prefixlen_);
// Make sure that the client renewed the requested address.
EXPECT_EQ(*hint, resp->getYiaddr());
// Check the lease was updated.
EXPECT_NEAR(lease->cltt_ + 1000, renewed->cltt_, 2);
// Valid lifetime should be the valid-lifetime parameter value (200).
opt = boost::dynamic_pointer_cast<OptionUint32>(resp->getOption(DHO_DHCP_LEASE_TIME));
ASSERT_TRUE(opt);
EXPECT_EQ(200, opt->getValue());
// Preferred lifetime should be the config preferred-lifetime (200).
EXPECT_EQ(200, renewed->preferred_lft_);
// Valid lifetime should be the config valid-lifetime (600).
EXPECT_EQ(600, renewed->valid_lft_);
}
// Test renewal with full pool.
TEST_F(FLQTest, renewFull) {
Dhcp6Client client(srv_, Dhcp6Client::SELECTING);
Dhcp6Client client(srv_);
// Configure DHCP server.
configure(FLQ_CONFIG, *client.getServer());
// Obtain a lease from the server using the 4-way exchange.
boost::shared_ptr<IOAddress> hint(new IOAddress("10.0.0.14"));
ASSERT_NO_THROW(client.doDORA(hint));
// Perform 4-way exchange with the server requesting the last prefix.
client.requestPrefix(1, 51, IOAddress("2001:db8:1:e000::"));
ASSERT_NO_THROW(client.doSARR());
// Make sure that the server responded.
Pkt6Ptr resp = client.getContext().response_;
ASSERT_TRUE(resp);
// Server should have assigned a prefix.
ASSERT_EQ(1, client.getLeaseNum());
Lease6Ptr lease = checkLease(client.getLease(0));
ASSERT_TRUE(lease);
// Make sure that the server has responded with DHCPACK.
ASSERT_EQ(DHCPACK, static_cast<int>(resp->getType()));
// Make sure that the client has got the requested prefix.
EXPECT_EQ("2001:db8:1:e000::", lease->addr_.toText());
EXPECT_EQ(51, lease->prefixlen_);
// Make sure that the client has got the requested address.
EXPECT_EQ(*hint, resp->getYiaddr());
// Preferred lifetime should be the config preferred-lifetime (200).
EXPECT_EQ(200, lease->preferred_lft_);
// Valid lifetime should be the valid-lifetime parameter value (200).
OptionUint32Ptr opt = boost::dynamic_pointer_cast<
OptionUint32>(resp->getOption(DHO_DHCP_LEASE_TIME));
ASSERT_TRUE(opt);
EXPECT_EQ(200, opt->getValue());
// Valid lifetime should be the config valid-lifetime (600).
EXPECT_EQ(600, lease->valid_lft_);
// Create leases for the first prefixes.
auto& lease_mgr = LeaseMgrFactory::instance();
auto lease0 = createLease6(IOAddress("2001:db8:1::"), 1);
EXPECT_TRUE(lease_mgr.addLease(lease0));
auto lease1 = createLease6(IOAddress("2001:db8:1:2000::"), 2);
EXPECT_TRUE(lease_mgr.addLease(lease1));
auto lease2 = createLease6(IOAddress("2001:db8:1:4000::"), 3);
EXPECT_TRUE(lease_mgr.addLease(lease2));
auto lease3 = createLease6(IOAddress("2001:db8:1:6000::"), 4);
EXPECT_TRUE(lease_mgr.addLease(lease3));
auto lease4 = createLease6(IOAddress("2001:db8:1:8000::"), 5);
EXPECT_TRUE(lease_mgr.addLease(lease4));
auto lease5 = createLease6(IOAddress("2001:db8:1:a000::"), 6);
EXPECT_TRUE(lease_mgr.addLease(lease5));
auto lease6 = createLease6(IOAddress("2001:db8:1:c000::"), 7);
EXPECT_TRUE(lease_mgr.addLease(lease6));
auto lease7 = createLease6(IOAddress("2001:db8:1:e000::"), 8);
// Age the lease.
auto& lease_mgr = LeaseMgrFactory::instance();
Lease6Ptr lease = lease_mgr.getLease6(*hint);
ASSERT_TRUE(lease);
lease->cltt_ -= 150;
lease->current_cltt_ -= 150;
lease->cltt_ -= 1000;
lease->current_cltt_ -= 1000;
EXPECT_NO_THROW(lease_mgr.updateLease6(lease));
// Create leases for the first addresses.
auto lease1 = createLease6(IOAddress("10.0.0.11"), 1);
EXPECT_TRUE(lease_mgr.addLease(lease1));
auto lease2 = createLease6(IOAddress("10.0.0.12"), 2);
EXPECT_TRUE(lease_mgr.addLease(lease2));
auto lease3 = createLease6(IOAddress("10.0.0.13"), 3);
EXPECT_TRUE(lease_mgr.addLease(lease3));
// Send the renew message to the server.
ASSERT_NO_THROW(client.doRenew());
// Let's transition the client to Renewing state.
client.setState(Dhcp6Client::RENEWING);
// Server should have renewed the prefix.
ASSERT_EQ(1, client.getLeaseNum());
Lease6Ptr renewed = checkLease(client.getLease(0));
ASSERT_TRUE(renewed);
// Set the unicast destination address to indicate that it is a renewal.
client.setDestAddress(IOAddress("10.0.0.1"));
ASSERT_NO_THROW(client.doRequest());
// Make sure that the client has got the same prefix.
EXPECT_EQ(lease->addr_, renewed->addr_);
EXPECT_EQ(lease->prefixlen_, renewed->prefixlen_);
// Make sure that renewal was ACKed.
resp = client.getContext().response_;
ASSERT_TRUE(resp);
ASSERT_EQ(DHCPACK, static_cast<int>(resp->getType()));
// Check the lease was updated.
EXPECT_NEAR(lease->cltt_ + 1000, renewed->cltt_, 2);
// Make sure that the client renewed the requested address.
EXPECT_EQ(*hint, resp->getYiaddr());
// Preferred lifetime should be the config min-preferred-lifetime (100).
EXPECT_EQ(100, renewed->preferred_lft_);
// Valid lifetime should be the min-valid-lifetime parameter value (100).
opt = boost::dynamic_pointer_cast<OptionUint32>(resp->getOption(DHO_DHCP_LEASE_TIME));
ASSERT_TRUE(opt);
EXPECT_EQ(100, opt->getValue());
// Valid lifetime should be the config min-valid-lifetime (400).
EXPECT_EQ(400, renewed->valid_lft_);
}
// Test renewal with full pool but remaining lifetime greater than minimal.
// Test renewal with full pool but remaining lifetimes greater than minimal.
TEST_F(FLQTest, renewRemaining) {
Dhcp6Client client(srv_, Dhcp6Client::SELECTING);
Dhcp6Client client(srv_);
// Configure DHCP server.
configure(FLQ_CONFIG, *client.getServer());
// Obtain a lease from the server using the 4-way exchange.
boost::shared_ptr<IOAddress> hint(new IOAddress("10.0.0.14"));
ASSERT_NO_THROW(client.doDORA(hint));
// Perform 4-way exchange with the server requesting the last prefix.
client.requestPrefix(1, 51, IOAddress("2001:db8:1:e000::"));
ASSERT_NO_THROW(client.doSARR());
// Make sure that the server responded.
Pkt6Ptr resp = client.getContext().response_;
ASSERT_TRUE(resp);
// Server should have assigned a prefix.
ASSERT_EQ(1, client.getLeaseNum());
Lease6Ptr lease = checkLease(client.getLease(0));
ASSERT_TRUE(lease);
// Make sure that the server has responded with DHCPACK.
ASSERT_EQ(DHCPACK, static_cast<int>(resp->getType()));
// Make sure that the client has got the requested prefix.
EXPECT_EQ("2001:db8:1:e000::", lease->addr_.toText());
EXPECT_EQ(51, lease->prefixlen_);
// Make sure that the client has got the requested address.
EXPECT_EQ(*hint, resp->getYiaddr());
// Preferred lifetime should be the config preferred-lifetime (200).
EXPECT_EQ(200, lease->preferred_lft_);
// Valid lifetime should be the valid-lifetime parameter value (200).
OptionUint32Ptr opt = boost::dynamic_pointer_cast<
OptionUint32>(resp->getOption(DHO_DHCP_LEASE_TIME));
ASSERT_TRUE(opt);
EXPECT_EQ(200, opt->getValue());
// Valid lifetime should be the config valid-lifetime (600).
EXPECT_EQ(600, lease->valid_lft_);
// Create leases for the first prefixes.
auto& lease_mgr = LeaseMgrFactory::instance();
auto lease0 = createLease6(IOAddress("2001:db8:1::"), 1);
EXPECT_TRUE(lease_mgr.addLease(lease0));
auto lease1 = createLease6(IOAddress("2001:db8:1:2000::"), 2);
EXPECT_TRUE(lease_mgr.addLease(lease1));
auto lease2 = createLease6(IOAddress("2001:db8:1:4000::"), 3);
EXPECT_TRUE(lease_mgr.addLease(lease2));
auto lease3 = createLease6(IOAddress("2001:db8:1:6000::"), 4);
EXPECT_TRUE(lease_mgr.addLease(lease3));
auto lease4 = createLease6(IOAddress("2001:db8:1:8000::"), 5);
EXPECT_TRUE(lease_mgr.addLease(lease4));
auto lease5 = createLease6(IOAddress("2001:db8:1:a000::"), 6);
EXPECT_TRUE(lease_mgr.addLease(lease5));
auto lease6 = createLease6(IOAddress("2001:db8:1:c000::"), 7);
EXPECT_TRUE(lease_mgr.addLease(lease6));
auto lease7 = createLease6(IOAddress("2001:db8:1:e000::"), 8);
// Age the lease but only by 50 seconds.
auto& lease_mgr = LeaseMgrFactory::instance();
Lease6Ptr lease = lease_mgr.getLease6(*hint);
ASSERT_TRUE(lease);
lease->cltt_ -= 50;
lease->current_cltt_ -= 50;
EXPECT_NO_THROW(lease_mgr.updateLease6(lease));
// Create leases for the first addresses.
auto lease1 = createLease6(IOAddress("10.0.0.11"), 1);
// Send the renew message to the server.
ASSERT_NO_THROW(client.doRenew());
// Server should have renewed the prefix.
ASSERT_EQ(1, client.getLeaseNum());
Lease6Ptr renewed = checkLease(client.getLease(0));
ASSERT_TRUE(renewed);
// Make sure that the client has got the same prefix.
EXPECT_EQ(lease->addr_, renewed->addr_);
EXPECT_EQ(lease->prefixlen_, renewed->prefixlen_);
// Check the lease was updated.
EXPECT_NEAR(lease->cltt_ + 50, renewed->cltt_, 2);
// Preferred lifetime should be the remaining lifetime so ~150.
EXPECT_NEAR(150, renewed->preferred_lft_, 2);
// Valid lifetime should be the remaining lifetime so ~550
EXPECT_NEAR(550, renewed->valid_lft_, 2);
}
// Test renewal with full pool but remaining valid lifetime only greater
// than minimal.
TEST_F(FLQTest, renewRemainingValid) {
Dhcp6Client client(srv_);
// Configure DHCP server.
configure(FLQ_CONFIG, *client.getServer());
// Perform 4-way exchange with the server requesting the last prefix.
client.requestPrefix(1, 51, IOAddress("2001:db8:1:e000::"));
ASSERT_NO_THROW(client.doSARR());
// Server should have assigned a prefix.
ASSERT_EQ(1, client.getLeaseNum());
Lease6Ptr lease = checkLease(client.getLease(0));
ASSERT_TRUE(lease);
// Make sure that the client has got the requested prefix.
EXPECT_EQ("2001:db8:1:e000::", lease->addr_.toText());
EXPECT_EQ(51, lease->prefixlen_);
// Preferred lifetime should be the config preferred-lifetime (200).
EXPECT_EQ(200, lease->preferred_lft_);
// Valid lifetime should be the config valid-lifetime (600).
EXPECT_EQ(600, lease->valid_lft_);
// Create leases for the first prefixes.
auto& lease_mgr = LeaseMgrFactory::instance();
auto lease0 = createLease6(IOAddress("2001:db8:1::"), 1);
EXPECT_TRUE(lease_mgr.addLease(lease0));
auto lease1 = createLease6(IOAddress("2001:db8:1:2000::"), 2);
EXPECT_TRUE(lease_mgr.addLease(lease1));
auto lease2 = createLease6(IOAddress("10.0.0.12"), 2);
auto lease2 = createLease6(IOAddress("2001:db8:1:4000::"), 3);
EXPECT_TRUE(lease_mgr.addLease(lease2));
auto lease3 = createLease6(IOAddress("10.0.0.13"), 3);
auto lease3 = createLease6(IOAddress("2001:db8:1:6000::"), 4);
EXPECT_TRUE(lease_mgr.addLease(lease3));
auto lease4 = createLease6(IOAddress("2001:db8:1:8000::"), 5);
EXPECT_TRUE(lease_mgr.addLease(lease4));
auto lease5 = createLease6(IOAddress("2001:db8:1:a000::"), 6);
EXPECT_TRUE(lease_mgr.addLease(lease5));
auto lease6 = createLease6(IOAddress("2001:db8:1:c000::"), 7);
EXPECT_TRUE(lease_mgr.addLease(lease6));
auto lease7 = createLease6(IOAddress("2001:db8:1:e000::"), 8);
// Let's transition the client to Renewing state.
client.setState(Dhcp6Client::RENEWING);
// Age the lease but only by 150 seconds.
lease->cltt_ -= 150;
lease->current_cltt_ -= 150;
EXPECT_NO_THROW(lease_mgr.updateLease6(lease));
// Set the unicast destination address to indicate that it is a renewal.
client.setDestAddress(IOAddress("10.0.0.1"));
ASSERT_NO_THROW(client.doRequest());
// Send the renew message to the server.
ASSERT_NO_THROW(client.doRenew());
// Make sure that renewal was ACKed.
resp = client.getContext().response_;
ASSERT_TRUE(resp);
ASSERT_EQ(DHCPACK, static_cast<int>(resp->getType()));
// Server should have renewed the prefix.
ASSERT_EQ(1, client.getLeaseNum());
Lease6Ptr renewed = checkLease(client.getLease(0));
ASSERT_TRUE(renewed);
// Make sure that the client renewed the requested address.
EXPECT_EQ(*hint, resp->getYiaddr());
// Make sure that the client has got the same prefix.
EXPECT_EQ(lease->addr_, renewed->addr_);
EXPECT_EQ(lease->prefixlen_, renewed->prefixlen_);
// Valid lifetime should be the remaining lifetime so ~150 seconds.
opt = boost::dynamic_pointer_cast<OptionUint32>(resp->getOption(DHO_DHCP_LEASE_TIME));
ASSERT_TRUE(opt);
EXPECT_NEAR(150, opt->getValue(), 2);
// Check the lease was updated.
EXPECT_NEAR(lease->cltt_ + 150, renewed->cltt_, 2);
// Preferred lifetime should be the config min-preferred-lifetime (100).
EXPECT_EQ(100, renewed->preferred_lft_);
// Valid lifetime should be the remaining lifetime so ~450
EXPECT_NEAR(450, renewed->valid_lft_, 2);
}
#endif
}

106
src/lib/dhcpsrv/alloc_engine.cc
View File

@ -1737,6 +1737,22 @@ AllocEngine::removeNonreservedLeases6(ClientContext6& ctx,
existing_leases.end(), Lease6Ptr()), existing_leases.end());
}
namespace {
bool
useMinLifetimes6(AllocEngine::ClientContext6& ctx, const IOAddress& addr,
uint8_t prefix_len) {
auto const& threshold = ctx.subnet_->getAdaptiveLeaseTimeThreshold();
if (!threshold.unspecified() && (threshold < 1.0)) {
auto const& occupancy = ctx.subnet_->getAllocator(Lease::TYPE_PD)->
getOccupancyRate(addr, prefix_len, ctx.query_->getClasses());
if (occupancy >= threshold) {
return (true);
}
}
return (false);
}
} // end of anonymous namespace.
Lease6Ptr
AllocEngine::reuseExpiredLease(Lease6Ptr& expired, ClientContext6& ctx,
uint8_t prefix_len,
@ -1750,19 +1766,8 @@ AllocEngine::reuseExpiredLease(Lease6Ptr& expired, ClientContext6& ctx,
isc_throw(BadValue, "Attempt to recycle registered address");
}
bool use_min = false;
if (expired->type_ != Lease::TYPE_PD) {
prefix_len = 128; // non-PD lease types must be always /128
} else {
auto const& threshold = ctx.subnet_->getAdaptiveLeaseTimeThreshold();
if (!threshold.unspecified() && (threshold < 1.0)) {
auto const& occupancy = ctx.subnet_->getAllocator(Lease::TYPE_PD)->
getOccupancyRate(expired->addr_, prefix_len,
ctx.query_->getClasses());
if (occupancy >= threshold) {
use_min = true;
}
}
}
if (!ctx.fake_allocation_) {
@ -1780,7 +1785,8 @@ AllocEngine::reuseExpiredLease(Lease6Ptr& expired, ClientContext6& ctx,
// Calculate life times.
expired->preferred_lft_ = 0;
expired->valid_lft_ = 0;
if (use_min) {
if ((expired->type_ == Lease::TYPE_PD) &&
useMinLifetimes6(ctx, expired->addr_, prefix_len)) {
getMinLifetimes6(ctx, expired->preferred_lft_, expired->valid_lft_);
} else {
getLifetimes6(ctx, expired->preferred_lft_, expired->valid_lft_);
@ -2053,23 +2059,14 @@ Lease6Ptr AllocEngine::createLease6(ClientContext6& ctx,
uint8_t prefix_len,
CalloutHandle::CalloutNextStep& callout_status) {
uint32_t preferred = 0;
uint32_t valid = 0;
bool use_min = false;
if (ctx.currentIA().type_ != Lease::TYPE_PD) {
prefix_len = 128; // non-PD lease types must be always /128
} else {
auto const& threshold = ctx.subnet_->getAdaptiveLeaseTimeThreshold();
if (!threshold.unspecified() && (threshold < 1.0)) {
auto const& occupancy = ctx.subnet_->getAllocator(Lease::TYPE_PD)->
getOccupancyRate(addr, prefix_len,
ctx.query_->getClasses());
if (occupancy >= threshold) {
use_min = true;
}
}
}
if (use_min) {
uint32_t preferred = 0;
uint32_t valid = 0;
if ((ctx.currentIA().type_ == Lease::TYPE_PD) &&
useMinLifetimes6(ctx, addr, prefix_len)) {
getMinLifetimes6(ctx, preferred, valid);
} else {
getLifetimes6(ctx, preferred, valid);
@ -2201,8 +2198,8 @@ Lease6Ptr AllocEngine::createLease6(ClientContext6& ctx,
}
void
AllocEngine::getRemaining(const Lease6Ptr& lease, uint32_t& valid,
uint32_t& preferred) {
AllocEngine::getRemaining(const Lease6Ptr& lease, uint32_t& preferred,
uint32_t& valid) {
valid = 0;
preferred = 0;
if (!lease || (lease->state_ != Lease::STATE_DEFAULT)) {
@ -2409,7 +2406,17 @@ AllocEngine::extendLease6(ClientContext6& ctx, Lease6Ptr lease) {
// Calculate life times.
uint32_t current_preferred_lft = lease->preferred_lft_;
if ((lease->type_ == Lease::TYPE_PD) &&
useMinLifetimes6(ctx, lease->addr_, lease->prefixlen_)) {
uint32_t remain_preferred_lft(0);
uint32_t remain_valid_lft(0);
getRemaining(lease, remain_preferred_lft, remain_valid_lft);
lease->preferred_lft_ = remain_preferred_lft;
lease->valid_lft_ = remain_valid_lft;
getMinLifetimes6(ctx, lease->preferred_lft_, lease->valid_lft_);
} else {
getLifetimes6(ctx, lease->preferred_lft_, lease->valid_lft_);
}
// If either has changed set the changed flag.
if ((lease->preferred_lft_ != current_preferred_lft) ||
@ -2595,8 +2602,14 @@ AllocEngine::updateLeaseData(ClientContext6& ctx, const Lease6Collection& leases
uint32_t current_preferred_lft = lease->preferred_lft_;
if (lease->valid_lft_ == 0) {
// The lease was expired by a release: reset zero lifetimes.
lease->preferred_lft_ = 0;
if ((lease->type_ == Lease::TYPE_PD) &&
useMinLifetimes6(ctx, lease->addr_, lease->prefixlen_)) {
getMinLifetimes6(ctx, lease->preferred_lft_, lease->valid_lft_);
} else {
getLifetimes6(ctx, lease->preferred_lft_, lease->valid_lft_);
}
}
if (!ctx.fake_allocation_) {
bool update_stats = false;
@ -4484,6 +4497,21 @@ AllocEngine::getMinValidLft(const ClientContext4& ctx, uint32_t& valid) {
}
}
namespace {
bool
useMinValidLft(const AllocEngine::ClientContext4& ctx, const IOAddress&addr) {
auto const& threshold = ctx.subnet_->getAdaptiveLeaseTimeThreshold();
if (!threshold.unspecified() && (threshold < 1.0)) {
auto const& occupancy = ctx.subnet_->getAllocator(Lease::TYPE_V4)->
getOccupancyRate(addr, ctx.query_->getClasses());
if (occupancy >= threshold) {
return (true);
}
}
return (false);
}
} // end of anonymous namespace.
Lease4Ptr
AllocEngine::createLease4(const ClientContext4& ctx, const IOAddress& addr,
CalloutHandle::CalloutNextStep& callout_status) {
@ -4497,16 +4525,7 @@ AllocEngine::createLease4(const ClientContext4& ctx, const IOAddress& addr,
// Get the context appropriate lifetime.
uint32_t valid_lft = ctx.offer_lft_;
if (!valid_lft) {
bool use_min(false);
auto const& threshold = ctx.subnet_->getAdaptiveLeaseTimeThreshold();
if (!threshold.unspecified() && (threshold < 1.0)) {
auto const& occupancy = ctx.subnet_->getAllocator(Lease::TYPE_V4)->
getOccupancyRate(addr, ctx.query_->getClasses());
if (occupancy >= threshold) {
use_min = true;
}
}
if (use_min) {
if (useMinValidLft(ctx, addr)) {
getMinValidLft(ctx, valid_lft);
} else {
valid_lft = getValidLft(ctx);
@ -5216,16 +5235,7 @@ AllocEngine::updateLease4Information(const Lease4Ptr& lease,
// Get the context appropriate valid lifetime.
lease->valid_lft_ = ctx.offer_lft_;
if (!lease->valid_lft_) {
bool use_min(false);
auto const& threshold = ctx.subnet_->getAdaptiveLeaseTimeThreshold();
if (!threshold.unspecified() && (threshold < 1.0)) {
auto const& occupancy = ctx.subnet_->getAllocator(Lease::TYPE_V4)->
getOccupancyRate(lease->addr_, ctx.query_->getClasses());
if (occupancy >= threshold) {
use_min = true;
}
}
if (use_min) {
if (useMinValidLft(ctx, lease->addr_)) {
lease->valid_lft_ = remain_lft;
getMinValidLft(ctx, lease->valid_lft_);
} else {

6
src/lib/dhcpsrv/alloc_engine.h
View File

@ -1596,10 +1596,10 @@ public:
/// @brief Set remaining valid and preferred life times.
///
/// @param lease A pointer to the lease.
/// @param [out] valid The remaining valid life time or 0.
/// @param [out] preferred The remaining preferred life time or 0.
static void getRemaining(const Lease6Ptr& lease, uint32_t& valid,
uint32_t& preferred);
/// @param [out] valid The remaining valid life time or 0.
static void getRemaining(const Lease6Ptr& lease, uint32_t& preferred,
uint32_t& valid);
private: