BIND 10 trac3153, updated. 3207932815f58045acea84ae092e0a5aa7c4bfd7 [3153] Unrelated change: minor clean-up in DHCPv4 call to hooks
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bind10-changes at lists.isc.org
Thu Oct 10 16:02:21 UTC 2013
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- Log -----------------------------------------------------------------
commit 3207932815f58045acea84ae092e0a5aa7c4bfd7
Author: Tomek Mrugalski <tomasz at isc.org>
Date: Thu Oct 10 18:02:06 2013 +0200
[3153] Unrelated change: minor clean-up in DHCPv4 call to hooks
commit 6489d09af85dddff538944f6efab14783a46fe9c
Author: Tomek Mrugalski <tomasz at isc.org>
Date: Thu Oct 10 18:01:41 2013 +0200
[3153] Changes after review:
- comments updated
- whitespaces cleaned up
- minor refactoring in DHCPv6 Srv
-----------------------------------------------------------------------
Summary of changes:
src/bin/dhcp4/dhcp4_srv.cc | 9 +--
src/bin/dhcp6/dhcp6_srv.cc | 110 ++++++++++++++++---------------
src/bin/dhcp6/tests/dhcp6_test_utils.cc | 16 +++--
src/bin/dhcp6/tests/dhcp6_test_utils.h | 22 +++++--
4 files changed, 84 insertions(+), 73 deletions(-)
-----------------------------------------------------------------------
diff --git a/src/bin/dhcp4/dhcp4_srv.cc b/src/bin/dhcp4/dhcp4_srv.cc
index edd9af4..e3269e3 100644
--- a/src/bin/dhcp4/dhcp4_srv.cc
+++ b/src/bin/dhcp4/dhcp4_srv.cc
@@ -201,8 +201,7 @@ Dhcpv4Srv::run() {
// The packet has just been received so contains the uninterpreted wire
// data; execute callouts registered for buffer4_receive.
- if (HooksManager::getHooksManager()
- .calloutsPresent(Hooks.hook_index_buffer4_receive_)) {
+ if (HooksManager::calloutsPresent(Hooks.hook_index_buffer4_receive_)) {
CalloutHandlePtr callout_handle = getCalloutHandle(query);
// Delete previously set arguments
@@ -396,8 +395,7 @@ Dhcpv4Srv::run() {
// Option objects modification does not make sense anymore. Hooks
// can only manipulate wire buffer at this stage.
// Let's execute all callouts registered for buffer4_send
- if (HooksManager::getHooksManager()
- .calloutsPresent(Hooks.hook_index_buffer4_send_)) {
+ if (HooksManager::calloutsPresent(Hooks.hook_index_buffer4_send_)) {
CalloutHandlePtr callout_handle = getCalloutHandle(query);
// Delete previously set arguments
@@ -931,8 +929,7 @@ Dhcpv4Srv::processRelease(Pkt4Ptr& release) {
bool skip = false;
// Execute all callouts registered for lease4_release
- if (HooksManager::getHooksManager()
- .calloutsPresent(Hooks.hook_index_lease4_release_)) {
+ if (HooksManager::calloutsPresent(Hooks.hook_index_lease4_release_)) {
CalloutHandlePtr callout_handle = getCalloutHandle(release);
// Delete all previous arguments
diff --git a/src/bin/dhcp6/dhcp6_srv.cc b/src/bin/dhcp6/dhcp6_srv.cc
index a07b313..d9155b3 100644
--- a/src/bin/dhcp6/dhcp6_srv.cc
+++ b/src/bin/dhcp6/dhcp6_srv.cc
@@ -233,7 +233,7 @@ bool Dhcpv6Srv::run() {
// The packet has just been received so contains the uninterpreted wire
// data; execute callouts registered for buffer6_receive.
- if (HooksManager::getHooksManager().calloutsPresent(Hooks.hook_index_buffer6_receive_)) {
+ if (HooksManager::calloutsPresent(Hooks.hook_index_buffer6_receive_)) {
CalloutHandlePtr callout_handle = getCalloutHandle(query);
// Delete previously set arguments
@@ -276,7 +276,7 @@ bool Dhcpv6Srv::run() {
// At this point the information in the packet has been unpacked into
// the various packet fields and option objects has been cretated.
// Execute callouts registered for packet6_receive.
- if (HooksManager::getHooksManager().calloutsPresent(Hooks.hook_index_pkt6_receive_)) {
+ if (HooksManager::calloutsPresent(Hooks.hook_index_pkt6_receive_)) {
CalloutHandlePtr callout_handle = getCalloutHandle(query);
// Delete previously set arguments
@@ -381,7 +381,7 @@ bool Dhcpv6Srv::run() {
// Options are represented by individual objects, but the
// output wire data has not been prepared yet.
// Execute all callouts registered for packet6_send
- if (HooksManager::getHooksManager().calloutsPresent(Hooks.hook_index_pkt6_send_)) {
+ if (HooksManager::calloutsPresent(Hooks.hook_index_pkt6_send_)) {
CalloutHandlePtr callout_handle = getCalloutHandle(query);
// Delete all previous arguments
@@ -425,7 +425,7 @@ bool Dhcpv6Srv::run() {
// Option objects modification does not make sense anymore. Hooks
// can only manipulate wire buffer at this stage.
// Let's execute all callouts registered for buffer6_send
- if (HooksManager::getHooksManager().calloutsPresent(Hooks.hook_index_buffer6_send_)) {
+ if (HooksManager::calloutsPresent(Hooks.hook_index_buffer6_send_)) {
CalloutHandlePtr callout_handle = getCalloutHandle(query);
// Delete previously set arguments
@@ -777,7 +777,7 @@ Dhcpv6Srv::selectSubnet(const Pkt6Ptr& question) {
}
// Let's execute all callouts registered for subnet6_receive
- if (HooksManager::getHooksManager().calloutsPresent(Hooks.hook_index_subnet6_select_)) {
+ if (HooksManager::calloutsPresent(Hooks.hook_index_subnet6_select_)) {
CalloutHandlePtr callout_handle = getCalloutHandle(question);
// We're reusing callout_handle from previous calls
@@ -1523,7 +1523,7 @@ Dhcpv6Srv::renewIA_NA(const Subnet6Ptr& subnet, const DuidPtr& duid,
bool skip = false;
// Execute all callouts registered for packet6_send
- if (HooksManager::getHooksManager().calloutsPresent(Hooks.hook_index_lease6_renew_)) {
+ if (HooksManager::calloutsPresent(Hooks.hook_index_lease6_renew_)) {
CalloutHandlePtr callout_handle = getCalloutHandle(query);
// Delete all previous arguments
@@ -1566,11 +1566,12 @@ Dhcpv6Srv::renewIA_NA(const Subnet6Ptr& subnet, const DuidPtr& duid,
OptionPtr
Dhcpv6Srv::renewIA_PD(const Subnet6Ptr& subnet, const DuidPtr& duid,
const Pkt6Ptr& query, boost::shared_ptr<Option6IA> ia) {
- if (!subnet) {
- // There's no subnet select for this client. There's nothing to renew.
- boost::shared_ptr<Option6IA> ia_rsp(new Option6IA(D6O_IA_PD, ia->getIAID()));
- // Insert status code NoAddrsAvail.
+ // Let's create a IA_NA response and fill it in later
+ boost::shared_ptr<Option6IA> ia_rsp(new Option6IA(D6O_IA_PD, ia->getIAID()));
+
+ if (!subnet) {
+ // Insert status code NoBinding
ia_rsp->addOption(createStatusCode(STATUS_NoBinding,
"Sorry, no known leases for this duid/iaid."));
@@ -1586,12 +1587,9 @@ Dhcpv6Srv::renewIA_PD(const Subnet6Ptr& subnet, const DuidPtr& duid,
subnet->getID());
if (!lease) {
- // client renewing a lease that we don't know about.
+ // Client is renewing a lease that we don't know about.
- // Create empty IA_NA option with IAID matching the request.
- boost::shared_ptr<Option6IA> ia_rsp(new Option6IA(D6O_IA_PD, ia->getIAID()));
-
- // Insert status code NoAddrsAvail.
+ // Insert status code NoBinding
ia_rsp->addOption(createStatusCode(STATUS_NoBinding,
"Sorry, no known leases for this duid/iaid."));
@@ -1603,29 +1601,29 @@ Dhcpv6Srv::renewIA_PD(const Subnet6Ptr& subnet, const DuidPtr& duid,
return (ia_rsp);
}
- // Keep the old data in case the callout tells us to skip update
+ // Keep the old data in case the callout tells us to skip update.
Lease6 old_data = *lease;
+ // Do the actual lease update
lease->preferred_lft_ = subnet->getPreferred();
lease->valid_lft_ = subnet->getValid();
lease->t1_ = subnet->getT1();
lease->t2_ = subnet->getT2();
lease->cltt_ = time(NULL);
- // Create empty IA_NA option with IAID matching the request.
- boost::shared_ptr<Option6IA> ia_rsp(new Option6IA(D6O_IA_PD, ia->getIAID()));
-
+ // Also update IA_PD container with proper T1, T2 values
ia_rsp->setT1(subnet->getT1());
ia_rsp->setT2(subnet->getT2());
boost::shared_ptr<Option6IAPrefix>
- prefix(new Option6IAPrefix(D6O_IAPREFIX, lease->addr_, lease->prefixlen_,
- lease->preferred_lft_, lease->valid_lft_));
+ prefix(new Option6IAPrefix(D6O_IAPREFIX, lease->addr_,
+ lease->prefixlen_, lease->preferred_lft_,
+ lease->valid_lft_));
ia_rsp->addOption(prefix);
bool skip = false;
// Execute all callouts registered for packet6_send
- if (HooksManager::getHooksManager().calloutsPresent(Hooks.hook_index_lease6_renew_)) {
+ if (HooksManager::calloutsPresent(Hooks.hook_index_lease6_renew_)) {
CalloutHandlePtr callout_handle = getCalloutHandle(query);
// Delete all previous arguments
@@ -1641,24 +1639,25 @@ Dhcpv6Srv::renewIA_PD(const Subnet6Ptr& subnet, const DuidPtr& duid,
callout_handle->setArgument("ia_pd", ia_rsp);
// Call all installed callouts
- HooksManager::callCallouts(Hooks.hook_index_lease6_renew_, *callout_handle);
+ HooksManager::callCallouts(Hooks.hook_index_lease6_renew_,
+ *callout_handle);
- // Callouts decided to skip the next processing step. The next
- // processing step would to actually renew the lease, so skip at this
- // stage means "keep the old lease as it is".
- if (callout_handle->getSkip()) {
- skip = true;
- LOG_DEBUG(dhcp6_logger, DBG_DHCP6_HOOKS, DHCP6_HOOK_LEASE6_RENEW_SKIP);
- }
+ // Remember hook's instruction whether we want to skip update or not
+ skip = callout_handle->getSkip();
}
if (!skip) {
LeaseMgrFactory::instance().updateLease6(lease);
} else {
+ // Callouts decided to skip the next processing step. The next
+ // processing step would to actually renew the lease, so skip at this
+ // stage means "keep the old lease as it is".
+ LOG_DEBUG(dhcp6_logger, DBG_DHCP6_HOOKS, DHCP6_HOOK_LEASE6_RENEW_SKIP);
+
// Copy back the original date to the lease. For MySQL it doesn't make
// much sense, but for memfile, the Lease6Ptr points to the actual lease
- // in memfile, so the actual update is performed when we manipulate fields
- // of returned Lease6Ptr, the actual updateLease6() is no-op.
+ // in memfile, so the actual update is performed when we manipulate
+ // fields of returned Lease6Ptr, the actual updateLease6() is no-op.
*lease = old_data;
}
@@ -1709,6 +1708,7 @@ Dhcpv6Srv::renewLeases(const Pkt6Ptr& renew, Pkt6Ptr& reply,
for (Option::OptionCollection::iterator opt = renew->options_.begin();
opt != renew->options_.end(); ++opt) {
switch (opt->second->getType()) {
+
case D6O_IA_NA: {
OptionPtr answer_opt = renewIA_NA(subnet, duid, renew,
boost::dynamic_pointer_cast<
@@ -1719,6 +1719,7 @@ Dhcpv6Srv::renewLeases(const Pkt6Ptr& renew, Pkt6Ptr& reply,
}
break;
}
+
case D6O_IA_PD: {
OptionPtr answer_opt = renewIA_PD(subnet, duid, renew,
boost::dynamic_pointer_cast<
@@ -1765,6 +1766,11 @@ Dhcpv6Srv::releaseLeases(const Pkt6Ptr& release, Pkt6Ptr& reply) {
}
DuidPtr duid(new DUID(opt_duid->getData()));
+ // Let's set the status to be success by default. We can override it with
+ // error status if needed. The important thing to understand here is that
+ // the global status code may be set to success only if all IA options were
+ // handled properly. Therefore the releaseIA_NA and releaseIA_PD options
+ // may turn the status code to some error, but can't turn it back to success.
int general_status = STATUS_Success;
for (Option::OptionCollection::iterator opt = release->options_.begin();
opt != release->options_.end(); ++opt) {
@@ -1818,7 +1824,7 @@ Dhcpv6Srv::releaseIA_NA(const DuidPtr& duid, const Pkt6Ptr& query,
(ia->getOption(D6O_IAADDR));
if (!release_addr) {
ia_rsp->addOption(createStatusCode(STATUS_NoBinding,
- "You did not include address in your RELEASE"));
+ "You did not include an address in your RELEASE"));
general_status = STATUS_NoBinding;
return (ia_rsp);
}
@@ -1887,7 +1893,7 @@ Dhcpv6Srv::releaseIA_NA(const DuidPtr& duid, const Pkt6Ptr& query,
bool skip = false;
// Execute all callouts registered for packet6_send
- if (HooksManager::getHooksManager().calloutsPresent(Hooks.hook_index_lease6_release_)) {
+ if (HooksManager::calloutsPresent(Hooks.hook_index_lease6_release_)) {
CalloutHandlePtr callout_handle = getCalloutHandle(query);
// Delete all previous arguments
@@ -1962,14 +1968,15 @@ Dhcpv6Srv::releaseIA_PD(const DuidPtr& duid, const Pkt6Ptr& query,
//
// This method implements approach 1.
- // That's our response
+ // That's our response. We will fill it in as we check the lease to be
+ // released.
boost::shared_ptr<Option6IA> ia_rsp(new Option6IA(D6O_IA_PD, ia->getIAID()));
- boost::shared_ptr<Option6IAPrefix> release_prefix = boost::dynamic_pointer_cast<Option6IAPrefix>
- (ia->getOption(D6O_IAPREFIX));
+ boost::shared_ptr<Option6IAPrefix> release_prefix =
+ boost::dynamic_pointer_cast<Option6IAPrefix>(ia->getOption(D6O_IAPREFIX));
if (!release_prefix) {
ia_rsp->addOption(createStatusCode(STATUS_NoBinding,
- "You did not include address in your RELEASE"));
+ "You did not include a prefix in your RELEASE"));
general_status = STATUS_NoBinding;
return (ia_rsp);
}
@@ -1978,9 +1985,9 @@ Dhcpv6Srv::releaseIA_PD(const DuidPtr& duid, const Pkt6Ptr& query,
release_prefix->getAddress());
if (!lease) {
- // client releasing a lease that we don't know about.
+ // Client releasing a lease that we don't know about.
- // Insert status code NoAddrsAvail.
+ // Insert status code NoBinding.
ia_rsp->addOption(createStatusCode(STATUS_NoBinding,
"Sorry, no known leases for this duid/iaid, can't release."));
general_status = STATUS_NoBinding;
@@ -1996,7 +2003,6 @@ Dhcpv6Srv::releaseIA_PD(const DuidPtr& duid, const Pkt6Ptr& query,
// Something is gravely wrong here. We do have a lease, but it does not
// have mandatory DUID information attached. Someone was messing with our
// database.
-
LOG_ERROR(dhcp6_logger, DHCP6_LEASE_PD_WITHOUT_DUID)
.arg(release_prefix->getAddress().toText());
@@ -2008,7 +2014,6 @@ Dhcpv6Srv::releaseIA_PD(const DuidPtr& duid, const Pkt6Ptr& query,
if (*duid != *(lease->duid_)) {
// Sorry, it's not your address. You can't release it.
-
LOG_INFO(dhcp6_logger, DHCP6_RELEASE_PD_FAIL_WRONG_DUID)
.arg(duid->toText())
.arg(release_prefix->getAddress().toText())
@@ -2038,7 +2043,7 @@ Dhcpv6Srv::releaseIA_PD(const DuidPtr& duid, const Pkt6Ptr& query,
bool skip = false;
// Execute all callouts registered for packet6_send
- if (HooksManager::getHooksManager().calloutsPresent(Hooks.hook_index_lease6_release_)) {
+ if (HooksManager::calloutsPresent(Hooks.hook_index_lease6_release_)) {
CalloutHandlePtr callout_handle = getCalloutHandle(query);
// Delete all previous arguments
@@ -2053,13 +2058,7 @@ Dhcpv6Srv::releaseIA_PD(const DuidPtr& duid, const Pkt6Ptr& query,
// Call all installed callouts
HooksManager::callCallouts(Hooks.hook_index_lease6_release_, *callout_handle);
- // Callouts decided to skip the next processing step. The next
- // processing step would to send the packet, so skip at this
- // stage means "drop response".
- if (callout_handle->getSkip()) {
- skip = true;
- LOG_DEBUG(dhcp6_logger, DBG_DHCP6_HOOKS, DHCP6_HOOK_LEASE6_RELEASE_PD_SKIP);
- }
+ skip = callout_handle->getSkip();
}
// Ok, we've passed all checks. Let's release this prefix.
@@ -2067,6 +2066,11 @@ Dhcpv6Srv::releaseIA_PD(const DuidPtr& duid, const Pkt6Ptr& query,
if (!skip) {
success = LeaseMgrFactory::instance().deleteLease(lease->addr_);
+ } else {
+ // Callouts decided to skip the next processing step. The next
+ // processing step would to send the packet, so skip at this
+ // stage means "drop response".
+ LOG_DEBUG(dhcp6_logger, DBG_DHCP6_HOOKS, DHCP6_HOOK_LEASE6_RELEASE_PD_SKIP);
}
// Here the success should be true if we removed lease successfully
@@ -2081,8 +2085,6 @@ Dhcpv6Srv::releaseIA_PD(const DuidPtr& duid, const Pkt6Ptr& query,
.arg(duid->toText())
.arg(lease->iaid_);
general_status = STATUS_UnspecFail;
-
- return (ia_rsp);
} else {
LOG_DEBUG(dhcp6_logger, DBG_DHCP6_DETAIL, DHCP6_RELEASE_PD)
.arg(lease->addr_.toText())
@@ -2091,9 +2093,9 @@ Dhcpv6Srv::releaseIA_PD(const DuidPtr& duid, const Pkt6Ptr& query,
ia_rsp->addOption(createStatusCode(STATUS_Success,
"Lease released. Thank you, please come again."));
-
- return (ia_rsp);
}
+
+ return (ia_rsp);
}
Pkt6Ptr
diff --git a/src/bin/dhcp6/tests/dhcp6_test_utils.cc b/src/bin/dhcp6/tests/dhcp6_test_utils.cc
index 7646ca3..93b6e44 100644
--- a/src/bin/dhcp6/tests/dhcp6_test_utils.cc
+++ b/src/bin/dhcp6/tests/dhcp6_test_utils.cc
@@ -295,10 +295,10 @@ Dhcpv6SrvTest::testRenewReject(Lease::Type type, const IOAddress& addr) {
checkResponse(reply, DHCPV6_REPLY, transid);
OptionPtr tmp = reply->getOption(code);
ASSERT_TRUE(tmp);
- // Check that IA_?? was returned and that there's an address included
+
+ // Check that IA_?? was returned and that there's proper status code
boost::shared_ptr<Option6IA> ia = boost::dynamic_pointer_cast<Option6IA>(tmp);
ASSERT_TRUE(ia);
-
checkIA_NAStatusCode(ia, STATUS_NoBinding);
// Check that there is no lease added
@@ -321,7 +321,8 @@ Dhcpv6SrvTest::testRenewReject(Lease::Type type, const IOAddress& addr) {
checkResponse(reply, DHCPV6_REPLY, transid);
tmp = reply->getOption(code);
ASSERT_TRUE(tmp);
- // Check that IA_NA was returned and that there's an address included
+
+ // Check that IA_?? was returned and that there's proper status code
ia = boost::dynamic_pointer_cast<Option6IA>(tmp);
ASSERT_TRUE(ia);
checkIA_NAStatusCode(ia, STATUS_NoBinding);
@@ -340,7 +341,8 @@ Dhcpv6SrvTest::testRenewReject(Lease::Type type, const IOAddress& addr) {
checkResponse(reply, DHCPV6_REPLY, transid);
tmp = reply->getOption(code);
ASSERT_TRUE(tmp);
- // Check that IA_NA was returned and that there's an address included
+
+ // Check that IA_?? was returned and that there's proper status code
ia = boost::dynamic_pointer_cast<Option6IA>(tmp);
ASSERT_TRUE(ia);
checkIA_NAStatusCode(ia, STATUS_NoBinding);
@@ -500,7 +502,8 @@ Dhcpv6SrvTest::testReleaseReject(Lease::Type type, const IOAddress& addr) {
checkResponse(reply, DHCPV6_REPLY, transid);
tmp = reply->getOption(code);
ASSERT_TRUE(tmp);
- // Check that IA_NA was returned and that there's an address included
+
+ // Check that IA_?? was returned and that there's proper status code
ia = boost::dynamic_pointer_cast<Option6IA>(tmp);
ASSERT_TRUE(ia);
checkIA_NAStatusCode(ia, STATUS_NoBinding);
@@ -523,7 +526,8 @@ Dhcpv6SrvTest::testReleaseReject(Lease::Type type, const IOAddress& addr) {
checkResponse(reply, DHCPV6_REPLY, transid);
tmp = reply->getOption(code);
ASSERT_TRUE(tmp);
- // Check that IA_NA was returned and that there's an address included
+
+ // Check that IA_?? was returned and that there's proper status code
ia = boost::dynamic_pointer_cast<Option6IA>(tmp);
ASSERT_TRUE(ia);
checkIA_NAStatusCode(ia, STATUS_NoBinding);
diff --git a/src/bin/dhcp6/tests/dhcp6_test_utils.h b/src/bin/dhcp6/tests/dhcp6_test_utils.h
index fb419f9..95ae9bd 100644
--- a/src/bin/dhcp6/tests/dhcp6_test_utils.h
+++ b/src/bin/dhcp6/tests/dhcp6_test_utils.h
@@ -316,21 +316,33 @@ class Dhcpv6SrvTest : public NakedDhcpv6SrvTest {
public:
/// Name of the server-id file (used in server-id tests)
- // these are empty for now, but let's keep them around
+ /// @brief Constructor that initalizes a simple default configuration
+ ///
+ /// Sets up a single subnet6 with one pool for addresses and second
+ /// pool for prefixes.
Dhcpv6SrvTest() {
subnet_ = Subnet6Ptr(new Subnet6(IOAddress("2001:db8:1::"), 48, 1000,
2000, 3000, 4000));
- pool_ = Pool6Ptr(new Pool6(Lease::TYPE_NA, IOAddress("2001:db8:1:1::"), 64));
+ pool_ = Pool6Ptr(new Pool6(Lease::TYPE_NA, IOAddress("2001:db8:1:1::"),
+ 64));
subnet_->addPool(pool_);
CfgMgr::instance().deleteSubnets6();
CfgMgr::instance().addSubnet6(subnet_);
// configure PD pool
- pd_pool_ = Pool6Ptr(new Pool6(Lease::TYPE_PD, IOAddress("2001:db8:1:2::"), 64, 80));
+ pd_pool_ = Pool6Ptr(new Pool6(Lease::TYPE_PD,
+ IOAddress("2001:db8:1:2::"), 64, 80));
subnet_->addPool(pd_pool_);
}
+ /// @brief destructor
+ ///
+ /// Removes existing configuration.
+ ~Dhcpv6SrvTest() {
+ CfgMgr::instance().deleteSubnets6();
+ };
+
/// @brief Checks that server response (ADVERTISE or REPLY) contains proper
/// IA_NA option
///
@@ -446,10 +458,6 @@ public:
testReleaseBasic(Lease::Type type, const IOAddress& existing,
const IOAddress& release_addr);
- ~Dhcpv6SrvTest() {
- CfgMgr::instance().deleteSubnets6();
- };
-
/// @brief Performs negative RELEASE test
///
/// See releaseReject and pdReleaseReject tests for detailed explanation.
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