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[4303] Servers now search for host reservations using any identifier.

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This commit is contained in:
Marcin Siodelski
2016-04-13 08:56:28 +02:00
parent 79bae943c9
commit 1f0f7c7d21
12 changed files with 268 additions and 24 deletions
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38
src/bin/dhcp4/dhcp4_srv.cc
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@@ -138,6 +138,44 @@ Dhcpv4Exchange::Dhcpv4Exchange(const AllocEnginePtr& alloc_engine,
.arg(subnet->getID());
}
}
// Before we can check for static reservations, we need to prepare a set
// of identifiers to be used for this.
// HW address.
if (context_->hwaddr_ && !context_->hwaddr_->hwaddr_.empty()) {
context_->host_identifiers_[Host::IDENT_HWADDR] = context_->hwaddr_->hwaddr_;
}
// Client identifier
if (context_->clientid_) {
const std::vector<uint8_t>& vec = context_->clientid_->getDuid();
if (!vec.empty()) {
// Client identifier type = DUID? Client identifier holding a DUID
// comprises Type (1 byte), IAID (4 bytes), followed by the actual
// DUID. Thus, the minimal length is 6.
if ((vec[0] == CLIENT_ID_OPTION_TYPE_DUID) && (vec.size() > 5)) {
// Extract DUID, skip IAID.
context_->host_identifiers_.insert(
AllocEngine::IdentifierPair(Host::IDENT_DUID,
std::vector<uint8_t>(vec.begin() + 5,
vec.end())));
}
/// @todo Add support for other client identifiers (see #4317).
}
}
// Circuit id
OptionPtr rai = query_->getOption(DHO_DHCP_AGENT_OPTIONS);
if (rai) {
OptionPtr circuit_id_opt = rai->getOption(RAI_OPTION_AGENT_CIRCUIT_ID);
if (circuit_id_opt) {
const OptionBuffer& circuit_id_vec = circuit_id_opt->getData();
if (!circuit_id_vec.empty()) {
context_->host_identifiers_[Host::IDENT_CIRCUIT_ID] = circuit_id_vec;
}
}
}
// Check for static reservations.
alloc_engine->findReservation(*context_);
};

17
src/bin/dhcp4/tests/dhcp4_client.cc
View File

@@ -1,4 +1,4 @@
// Copyright (C) 2014-2015 Internet Systems Consortium, Inc. ("ISC")
// Copyright (C) 2014-2016 Internet Systems Consortium, Inc. ("ISC")
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
@@ -49,7 +49,8 @@ Dhcp4Client::Dhcp4Client(const Dhcp4Client::State& state) :
server_facing_relay_addr_("10.0.0.2"),
srv_(boost::shared_ptr<NakedDhcpv4Srv>(new NakedDhcpv4Srv(0))),
state_(state),
use_relay_(false) {
use_relay_(false),
circuit_id_() {
}
Dhcp4Client::Dhcp4Client(boost::shared_ptr<NakedDhcpv4Srv> srv,
@@ -67,7 +68,8 @@ Dhcp4Client::Dhcp4Client(boost::shared_ptr<NakedDhcpv4Srv> srv,
server_facing_relay_addr_("10.0.0.2"),
srv_(srv),
state_(state),
use_relay_(false) {
use_relay_(false),
circuit_id_() {
}
void
@@ -468,6 +470,15 @@ Dhcp4Client::sendMsg(const Pkt4Ptr& msg) {
msg->setHops(1);
msg->setGiaddr(relay_addr_);
msg->setLocalAddr(server_facing_relay_addr_);
// Insert RAI
OptionPtr rai(new Option(Option::V4, DHO_DHCP_AGENT_OPTIONS));
// Insert circuit id, if specified.
if (!circuit_id_.empty()) {
rai->addOption(OptionPtr(new Option(Option::V4, RAI_OPTION_AGENT_CIRCUIT_ID,
OptionBuffer(circuit_id_.begin(),
circuit_id_.end()))));
}
msg->addOption(rai);
}
// Repack the message to simulate wire-data parsing.
msg->pack();

14
src/bin/dhcp4/tests/dhcp4_client.h
View File

@@ -1,4 +1,4 @@
// Copyright (C) 2014-2015 Internet Systems Consortium, Inc. ("ISC")
// Copyright (C) 2014-2016 Internet Systems Consortium, Inc. ("ISC")
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
@@ -284,6 +284,14 @@ public:
const uint8_t option2 = 0,
const uint8_t option3 = 0);
/// @brief Sets circuit-id value to be included in the circuit-id
/// sub option of the RAI option.
///
/// @param circuit_id New circuit-id value.
void setCircuitId(const std::string& circuit_id) {
circuit_id_ = circuit_id;
}
/// @brief Sets destination address for the messages being sent by the
/// client.
///
@@ -468,6 +476,10 @@ private:
/// @brief Enable relaying messages to the server.
bool use_relay_;
/// @brief Specifies value to be inserted into circuit-id sub option
/// of the RAI option.
std::string circuit_id_;
/// @brief Extra options the client will send.
OptionCollection extra_options_;
};

35
src/bin/dhcp4/tests/dora_unittest.cc
View File

@@ -1,4 +1,4 @@
// Copyright (C) 2014-2015 Internet Systems Consortium, Inc. ("ISC")
// Copyright (C) 2014-2016 Internet Systems Consortium, Inc. ("ISC")
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
@@ -125,6 +125,14 @@ const char* DORA_CONFIGS[] = {
" {"
" \"hw-address\": \"aa:bb:cc:dd:ee:ff\","
" \"ip-address\": \"10.0.0.7\""
" },"
" {"
" \"duid\": \"01:02:03:04:05\","
" \"ip-address\": \"10.0.0.8\""
" },"
" {"
" \"circuit-id\": \"'charter950'\","
" \"ip-address\": \"10.0.0.9\""
" }"
" ]"
"} ]"
@@ -688,6 +696,31 @@ TEST_F(DORATest, reservation) {
ASSERT_TRUE(subnet->inPool(Lease::TYPE_V4, clientB.config_.lease_.addr_));
}
// This test checks that it is possible to make a reservation by
// circuit-id inserted by the relay agent..
TEST_F(DORATest, reservationByCircuitId) {
// Client A is a one which will have a reservation.
Dhcp4Client client(Dhcp4Client::SELECTING);
// Use relay agent so as the circuit-id can be inserted.
client.useRelay(true, IOAddress("10.0.0.1"), IOAddress("10.0.0.2"));
// Specify circuit-id.
client.setCircuitId("charter950");
// Configure DHCP server.
configure(DORA_CONFIGS[2], *client.getServer());
// Client A performs 4-way exchange and should obtain a reserved
// address.
ASSERT_NO_THROW(client.doDORA(boost::shared_ptr<
IOAddress>(new IOAddress("0.0.0.0"))));
// Make sure that the server responded.
ASSERT_TRUE(client.getContext().response_);
Pkt4Ptr resp = client.getContext().response_;
// 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 lease for the reserved address.
ASSERT_EQ("10.0.0.9", client.config_.lease_.addr_.toText());
}
// This test checks that setting the match-client-id value to false causes
// the server to ignore changing client identifier when the client is
// using consistent HW address.

17
src/bin/dhcp6/dhcp6_srv.cc
View File

@@ -276,9 +276,20 @@ AllocEngine::ClientContext6
Dhcpv6Srv::createContext(const Pkt6Ptr& pkt) {
AllocEngine::ClientContext6 ctx;
ctx.subnet_ = selectSubnet(pkt);
ctx.duid_ = pkt->getClientId();
ctx.hwaddr_ = getMAC(pkt);
ctx.query_ = pkt;
// Collect host identifiers.
// DUID
ctx.duid_ = pkt->getClientId();
if (ctx.duid_) {
ctx.host_identifiers_[Host::IDENT_DUID] = ctx.duid_->getDuid();
}
// HW Address.
ctx.hwaddr_ = getMAC(pkt);
if (ctx.hwaddr_) {
ctx.host_identifiers_[Host::IDENT_HWADDR] = ctx.hwaddr_->hwaddr_;
}
// And find a host reservation using those identifiers.
alloc_engine_->findReservation(ctx);
return (ctx);
@@ -1321,6 +1332,7 @@ Dhcpv6Srv::assignIA_NA(const Pkt6Ptr& query, const Pkt6Ptr& answer,
ctx.hwaddr_ = orig_ctx.hwaddr_;
ctx.host_ = orig_ctx.host_;
ctx.query_ = orig_ctx.query_;
ctx.host_identifiers_ = orig_ctx.host_identifiers_;
Lease6Collection leases = alloc_engine_->allocateLeases6(ctx);
@@ -1442,6 +1454,7 @@ Dhcpv6Srv::assignIA_PD(const Pkt6Ptr& query, const Pkt6Ptr& answer,
ctx.hwaddr_ = orig_ctx.hwaddr_;
ctx.host_ = orig_ctx.host_;
ctx.query_ = orig_ctx.query_;
ctx.host_identifiers_ = orig_ctx.host_identifiers_;
Lease6Collection leases = alloc_engine_->allocateLeases6(ctx);

9
src/bin/dhcp6/tests/dhcp6_client.h
View File

@@ -1,4 +1,4 @@
// Copyright (C) 2014-2015 Internet Systems Consortium, Inc. ("ISC")
// Copyright (C) 2014-2016 Internet Systems Consortium, Inc. ("ISC")
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
@@ -412,6 +412,13 @@ public:
iface_name_ = iface_name;
}
/// @brief Sets link local address used by the client.
///
/// @param link_local New link local address.
void setLinkLocal(const asiolink::IOAddress& link_local) {
link_local_ = link_local;
}
/// @brief Set an address hint to be sent to a server.
///
/// @param pref_lft Preferred lifetime.

88
src/bin/dhcp6/tests/host_unittest.cc
View File

@@ -1,15 +1,17 @@
// Copyright (C) 2015 Internet Systems Consortium, Inc. ("ISC")
// Copyright (C) 2015-2016 Internet Systems Consortium, Inc. ("ISC")
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
#include <config.h>
#include <asiolink/io_address.h>
#include <dhcp/tests/iface_mgr_test_config.h>
#include <dhcp6/tests/dhcp6_test_utils.h>
#include <dhcp6/tests/dhcp6_client.h>
using namespace isc;
using namespace isc::asiolink;
using namespace isc::dhcp;
using namespace isc::dhcp::test;
@@ -19,6 +21,8 @@ namespace {
///
/// - Configuration 0:
/// Single subnet with two reservations, one with a hostname, one without
/// - Configuration 1:
/// Multiple reservations using different host identifiers.
const char* CONFIGS[] = {
// Configuration 0:
"{ "
@@ -45,7 +49,35 @@ const char* CONFIGS[] = {
" \"ip-addresses\": [ \"2001:db8:1:1::babf\" ]"
" } ]"
" } ]"
"}",
// Configuration 1:
"{ "
"\"interfaces-config\": {"
" \"interfaces\": [ \"*\" ]"
"},"
"\"valid-lifetime\": 4000, "
"\"preferred-lifetime\": 3000,"
"\"rebind-timer\": 2000, "
"\"renew-timer\": 1000, "
"\"mac-sources\": [ \"ipv6-link-local\" ], "
"\"subnet6\": [ "
" { "
" \"subnet\": \"2001:db8:1::/48\", "
" \"pools\": [ { \"pool\": \"2001:db8:1::/64\" } ],"
" \"interface\" : \"eth0\" , "
" \"reservations\": ["
" {"
" \"hw-address\": \"38:60:77:d5:ff:ee\","
" \"ip-addresses\": [ \"2001:db8:1::1\" ]"
" },"
" {"
" \"duid\": \"01:02:03:05\","
" \"ip-addresses\": [ \"2001:db8:1::2\" ]"
" } ]"
" } ]"
"}"
};
/// @brief Test fixture class for testing host reservations
@@ -59,6 +91,36 @@ public:
iface_mgr_test_config_(true) {
}
/// @brief Verifies that the reservation is retrieved by the server
/// using one of the host identifiers.
///
/// @param client Reference to a client to be used in the test.
/// The client should be preconfigured to insert a specific identifier
/// into the message, e.g. DUID, HW address etc.
/// @param exp_ip_address Expected IPv6 address in the returned
/// reservation.
void testReservationByIdentifier(Dhcp6Client& client,
const std::string exp_ip_address) {
configure(CONFIGS[1], *client.getServer());
const Subnet6Collection* subnets = CfgMgr::instance().getCurrentCfg()->
getCfgSubnets6()->getAll();
ASSERT_EQ(1, subnets->size());
// Configure client to request IA_NA and append IA_NA option
// to the client's message.
client.useNA();
ASSERT_NO_THROW(client.useHint(100, 200, 64, "2001:db8:1:1::dead:beef"));
// Perform 4-way exchange.
ASSERT_NO_THROW(client.doSARR());
// Verify that the client we got the reserved address
ASSERT_EQ(1, client.getLeaseNum());
Lease6 lease_client = client.getLease(0);
EXPECT_EQ(exp_ip_address, lease_client.addr_.toText());
}
/// @brief Interface Manager's fake configuration control.
IfaceMgrTestConfig iface_mgr_test_config_;
};
@@ -246,4 +308,28 @@ TEST_F(HostTest, sarrAndRebind) {
EXPECT_EQ("alice", lease_server2->hostname_);
}
// This test verfies that the host reservation by DUID is found by the
// server.
TEST_F(HostTest, reservationByDUID) {
Dhcp6Client client;
// Set DUID matching the one used to create host reservations.
client.setDUID("01:02:03:05");
// Run the actual test.
testReservationByIdentifier(client, "2001:db8:1::2");
}
// This test verfies that the host reservation by HW address is found
// by the server.
TEST_F(HostTest, reservationByHWAddress) {
Dhcp6Client client;
// Set link local address for the client which the server will
// use to decode the HW address as 38:60:77:d5:ff:ee. This
// decoded address will be used to search for host reservations.
client.setLinkLocal(IOAddress("fe80::3a60:77ff:fed5:ffee"));
// Run the actual test.
testReservationByIdentifier(client, "2001:db8:1::1");
}
} // end of anonymous namespace

3
src/lib/dhcp/dhcp4.h
View File

@@ -283,6 +283,9 @@ static const uint16_t RAI_OPTION_VIRTUAL_SUBNET_SELECT_CTRL = 152; //RFC6607
#endif
/* Client identifier types */
static const uint8_t CLIENT_ID_OPTION_TYPE_DUID = 255;
} // end of isc::dhcp namespace
} // end of isc namespace

49
src/lib/dhcpsrv/alloc_engine.cc
View File

@@ -309,7 +309,7 @@ AllocEngine::ClientContext6::ClientContext6()
: subnet_(), duid_(), iaid_(0), type_(Lease::TYPE_NA), hwaddr_(),
hints_(), fwd_dns_update_(false), rev_dns_update_(false), hostname_(""),
callout_handle_(), fake_allocation_(false), old_leases_(), host_(),
query_(), ia_rsp_() {
query_(), ia_rsp_(), host_identifiers_() {
}
AllocEngine::ClientContext6::ClientContext6(const Subnet6Ptr& subnet, const DuidPtr& duid,
@@ -322,7 +322,7 @@ AllocEngine::ClientContext6::ClientContext6(const Subnet6Ptr& subnet, const Duid
subnet_(subnet), duid_(duid), iaid_(iaid), type_(type), hwaddr_(),
hints_(), fwd_dns_update_(fwd_dns), rev_dns_update_(rev_dns),
hostname_(hostname), fake_allocation_(fake_allocation),
old_leases_(), host_(), query_(), ia_rsp_() {
old_leases_(), host_(), query_(), ia_rsp_(), host_identifiers_() {
static asiolink::IOAddress any("::");
@@ -331,6 +331,11 @@ AllocEngine::ClientContext6::ClientContext6(const Subnet6Ptr& subnet, const Duid
}
// callout_handle, host pointers initiated to NULL by their
// respective constructors.
// Initialize host identifiers.
if (duid) {
host_identifiers_[Host::IDENT_DUID] = duid->getDuid();
}
}
@@ -339,6 +344,8 @@ void AllocEngine::findReservation(ClientContext6& ctx) const {
return;
}
ctx.host_.reset();
// Check which host reservation mode is supported in this subnet.
Subnet::HRMode hr_mode = ctx.subnet_->getHostReservationMode();
@@ -346,11 +353,15 @@ void AllocEngine::findReservation(ClientContext6& ctx) const {
// host info only if reservations are not disabled.
if (hr_mode != Subnet::HR_DISABLED) {
ctx.host_ = HostMgr::instance().get6(ctx.subnet_->getID(), ctx.duid_,
ctx.hwaddr_);
} else {
// Let's explicitly set it to NULL if reservations are disabled.
ctx.host_.reset();
BOOST_FOREACH(const IdentifierPair& id, ctx.host_identifiers_) {
ctx.host_ = HostMgr::instance().get6(ctx.subnet_->getID(),
id.first, &id.second[0],
id.second.size());
// If we found matching host, return.
if (ctx.host_) {
return;
}
}
}
}
@@ -2049,7 +2060,8 @@ AllocEngine::ClientContext4::ClientContext4()
requested_address_(IOAddress::IPV4_ZERO_ADDRESS()),
fwd_dns_update_(false), rev_dns_update_(false),
hostname_(""), callout_handle_(), fake_allocation_(false),
old_lease_(), host_(), conflicting_lease_(), query_() {
old_lease_(), host_(), conflicting_lease_(), query_(),
host_identifiers_() {
}
AllocEngine::ClientContext4::ClientContext4(const Subnet4Ptr& subnet,
@@ -2064,7 +2076,13 @@ AllocEngine::ClientContext4::ClientContext4(const Subnet4Ptr& subnet,
requested_address_(requested_addr),
fwd_dns_update_(fwd_dns_update), rev_dns_update_(rev_dns_update),
hostname_(hostname), callout_handle_(),
fake_allocation_(fake_allocation), old_lease_(), host_() {
fake_allocation_(fake_allocation), old_lease_(), host_(),
host_identifiers_() {
// Initialize host identifiers.
if (hwaddr) {
host_identifiers_[Host::IDENT_HWADDR] = hwaddr->hwaddr_;
}
}
Lease4Ptr
@@ -2109,10 +2127,15 @@ AllocEngine::findReservation(ClientContext4& ctx) {
// Check if there is a host reseravtion for this client. Attempt to
// get host information
if (hr_mode != Subnet::HR_DISABLED) {
// This method should handle the case when there is neither hwaddr
// nor clientid_ available and simply return NULL.
ctx.host_ = HostMgr::instance().get4(ctx.subnet_->getID(), ctx.hwaddr_,
ctx.clientid_);
BOOST_FOREACH(const IdentifierPair& id, ctx.host_identifiers_) {
ctx.host_ = HostMgr::instance().get4(ctx.subnet_->getID(),
id.first, &id.second[0],
id.second.size());
// If we found matching host, return.
if (ctx.host_) {
return;
}
}
}
}
}

17
src/lib/dhcpsrv/alloc_engine.h
View File

@@ -1,4 +1,4 @@
// Copyright (C) 2012-2015 Internet Systems Consortium, Inc. ("ISC")
// Copyright (C) 2012-2016 Internet Systems Consortium, Inc. ("ISC")
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
@@ -23,6 +23,7 @@
#include <boost/noncopyable.hpp>
#include <map>
#include <utility>
namespace isc {
namespace dhcp {
@@ -251,6 +252,12 @@ public:
/// @brief Container for client's hints.
typedef std::vector<HintType> HintContainer;
/// @brief A tuple holding host identifier type and value.
typedef std::pair<Host::IdentifierType, std::vector<uint8_t> > IdentifierPair;
/// @brief Map holding values to be used as host identifiers.
typedef std::map<Host::IdentifierType, std::vector<uint8_t> > IdentifierMap;
/// @brief Context information for the DHCPv6 leases allocation.
///
/// This structure holds a set of information provided by the DHCPv6
@@ -350,6 +357,10 @@ public:
/// @brief A pointer to the IA_NA/IA_PD option to be sent in response
Option6IAPtr ia_rsp_;
/// @brief A map holding host identifiers extracted from a message
/// received by the server.
IdentifierMap host_identifiers_;
/// @brief Default constructor.
ClientContext6();
@@ -971,6 +982,10 @@ public:
/// transaction identification information.
Pkt4Ptr query_;
/// @brief A map holding host identifiers extracted from a message
/// received by the server.
IdentifierMap host_identifiers_;
/// @brief Default constructor.
ClientContext4();

2
src/lib/dhcpsrv/tests/alloc_engine4_unittest.cc
View File

@@ -1649,6 +1649,8 @@ TEST_F(AllocEngine4Test, findReservation) {
AllocEngine::ClientContext4 ctx(subnet_, clientid_, hwaddr_,
IOAddress("0.0.0.0"), false, false,
"", false);
ctx.host_identifiers_[Host::IDENT_HWADDR] = hwaddr_->hwaddr_;
ctx.host_identifiers_[Host::IDENT_DUID] = clientid_->getDuid();
// There is no reservation in the database so no host should be
// retruned.

3
src/lib/dhcpsrv/tests/alloc_engine_utils.cc
View File

@@ -1,4 +1,4 @@
// Copyright (C) 2012-2015 Internet Systems Consortium, Inc. ("ISC")
// Copyright (C) 2012-2016 Internet Systems Consortium, Inc. ("ISC")
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
@@ -270,6 +270,7 @@ AllocEngine6Test::simpleAlloc6Test(const Pool6Ptr& pool, const IOAddress& hint,
AllocEngine::ClientContext6 ctx(subnet_, duid_, iaid_, hint, type,
false, false, "", fake);
ctx.hwaddr_ = hwaddr_;
ctx.host_identifiers_[Host::IDENT_HWADDR] = hwaddr_->hwaddr_;
ctx.query_.reset(new Pkt6(fake ? DHCPV6_SOLICIT : DHCPV6_REQUEST, 1234));
findReservation(*engine, ctx);