subnet.cc 25.5 KB
Newer Older
1
// Copyright (C) 2012-2017 Internet Systems Consortium, Inc. ("ISC")
2
//
3
4
5
// 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/.
6

7
8
#include <config.h>

9
#include <asiolink/io_address.h>
10
#include <dhcp/option_space.h>
11
12
#include <dhcpsrv/addr_utilities.h>
#include <dhcpsrv/subnet.h>
13
#include <algorithm>
14
#include <sstream>
15
16

using namespace isc::asiolink;
17
using namespace isc::data;
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
using namespace isc::dhcp;

namespace {

/// @brief Function used in calls to std::upper_bound to check
/// if the specified prefix is lower than the first address a pool.
///
/// @return true if prefix is lower than the first address in the pool.
bool
prefixLessThanFirstAddress(const IOAddress& prefix, const PoolPtr& pool) {
    return (prefix < pool->getFirstAddress());
}

/// @brief Function used in calls to std::sort to compare first
/// prefixes of the two pools.
///
/// @param pool1 First pool.
/// @param pool2 Second pool.
///
/// @return true if first prefix of the first pool is smaller than
/// the first address of the second pool.
bool
comparePoolFirstAddress(const PoolPtr& pool1, const PoolPtr& pool2) {
    return (pool1->getFirstAddress() < pool2->getFirstAddress());
};

}
45
46
47
48

namespace isc {
namespace dhcp {

49
50
51
// This is an initial value of subnet-id. See comments in subnet.h for details.
SubnetID Subnet::static_id_ = 1;

52
53
54
Subnet::Subnet(const isc::asiolink::IOAddress& prefix, uint8_t len,
               const Triplet<uint32_t>& t1,
               const Triplet<uint32_t>& t2,
55
               const Triplet<uint32_t>& valid_lifetime,
56
57
58
               const isc::dhcp::Subnet::RelayInfo& relay,
               const SubnetID id)
    :id_(id == 0 ? generateNextID() : id), prefix_(prefix), prefix_len_(len),
59
     t1_(t1), t2_(t2), valid_(valid_lifetime),
60
61
     last_allocated_ia_(lastAddrInPrefix(prefix, len)),
     last_allocated_ta_(lastAddrInPrefix(prefix, len)),
62
     last_allocated_pd_(lastAddrInPrefix(prefix, len)), relay_(relay),
63
     host_reservation_mode_(HR_ALL), cfg_option_(new CfgOption())
64
      {
65
66
    if ((prefix.isV6() && len > 128) ||
        (prefix.isV4() && len > 32)) {
67
        isc_throw(BadValue,
68
                  "Invalid prefix length specified for subnet: " << len);
69
70
71
    }
}

72
73
74
75
Subnet::RelayInfo::RelayInfo(const isc::asiolink::IOAddress& addr)
    :addr_(addr) {
}

76
bool
77
Subnet::inRange(const isc::asiolink::IOAddress& addr) const {
78
79
80
81
82
83
    IOAddress first = firstAddrInPrefix(prefix_, prefix_len_);
    IOAddress last = lastAddrInPrefix(prefix_, prefix_len_);

    return ((first <= addr) && (addr <= last));
}

84
void
85
Subnet::setRelayInfo(const isc::dhcp::Subnet::RelayInfo& relay) {
86
87
88
    relay_ = relay;
}

89
90
91
92
93
94
95
bool
Subnet::clientSupported(const isc::dhcp::ClientClasses& classes) const {
    if (white_list_.empty()) {
        return (true); // There is no class defined for this subnet, so we do
                       // support everyone.
    }

96
97
98
99
100
101
102
103
    for (ClientClasses::const_iterator it = white_list_.begin();
         it != white_list_.end(); ++it) {
        if (classes.contains(*it)) {
            return (true);
        }
    }

    return (false);
104
105
106
107
}

void
Subnet::allowClientClass(const isc::dhcp::ClientClass& class_name) {
108
    white_list_.insert(class_name);
109
110
}

111
isc::asiolink::IOAddress Subnet::getLastAllocated(Lease::Type type) const {
112
113
114
    // check if the type is valid (and throw if it isn't)
    checkType(type);

115
    switch (type) {
116
117
    case Lease::TYPE_V4:
    case Lease::TYPE_NA:
118
        return last_allocated_ia_;
119
    case Lease::TYPE_TA:
120
        return last_allocated_ta_;
121
    case Lease::TYPE_PD:
122
123
124
125
126
127
        return last_allocated_pd_;
    default:
        isc_throw(BadValue, "Pool type " << type << " not supported");
    }
}

128
void Subnet::setLastAllocated(Lease::Type type,
129
130
131
132
133
                              const isc::asiolink::IOAddress& addr) {

    // check if the type is valid (and throw if it isn't)
    checkType(type);

134
    switch (type) {
135
136
    case Lease::TYPE_V4:
    case Lease::TYPE_NA:
137
138
        last_allocated_ia_ = addr;
        return;
139
    case Lease::TYPE_TA:
140
141
        last_allocated_ta_ = addr;
        return;
142
    case Lease::TYPE_PD:
143
144
145
146
147
148
149
        last_allocated_pd_ = addr;
        return;
    default:
        isc_throw(BadValue, "Pool type " << type << " not supported");
    }
}

150
std::string
151
Subnet::toText() const {
152
    std::stringstream tmp;
153
    tmp << prefix_ << "/" << static_cast<unsigned int>(prefix_len_);
154
155
156
    return (tmp.str());
}

157
uint64_t
Tomek Mrugalski's avatar
Tomek Mrugalski committed
158
Subnet::getPoolCapacity(Lease::Type type) const {
159
160
161
    switch (type) {
    case Lease::TYPE_V4:
    case Lease::TYPE_NA:
Tomek Mrugalski's avatar
Tomek Mrugalski committed
162
        return sumPoolCapacity(pools_);
163
    case Lease::TYPE_TA:
Tomek Mrugalski's avatar
Tomek Mrugalski committed
164
        return sumPoolCapacity(pools_ta_);
165
    case Lease::TYPE_PD:
Tomek Mrugalski's avatar
Tomek Mrugalski committed
166
        return sumPoolCapacity(pools_pd_);
167
168
169
170
171
172
173
    default:
        isc_throw(BadValue, "Unsupported pool type: "
                  << static_cast<int>(type));
    }
}

uint64_t
Tomek Mrugalski's avatar
Tomek Mrugalski committed
174
Subnet::sumPoolCapacity(const PoolCollection& pools) const {
175
176
    uint64_t sum = 0;
    for (PoolCollection::const_iterator p = pools.begin(); p != pools.end(); ++p) {
Tomek Mrugalski's avatar
Tomek Mrugalski committed
177
        uint64_t x = (*p)->getCapacity();
178
179
180
181
182
183
184
185
186
187
188
189
190

        // Check if we can add it. If sum + x > uint64::max, then we would have
        // overflown if we tried to add it.
        if (x > std::numeric_limits<uint64_t>::max() - sum) {
            return (std::numeric_limits<uint64_t>::max());
        }

        sum += x;
    }

    return (sum);
}

191
192
void Subnet4::checkType(Lease::Type type) const {
    if (type != Lease::TYPE_V4) {
193
194
195
196
        isc_throw(BadValue, "Only TYPE_V4 is allowed for Subnet4");
    }
}

197
198
199
Subnet4::Subnet4(const isc::asiolink::IOAddress& prefix, uint8_t length,
                 const Triplet<uint32_t>& t1,
                 const Triplet<uint32_t>& t2,
200
201
                 const Triplet<uint32_t>& valid_lifetime,
                 const SubnetID id)
202
    : Subnet(prefix, length, t1, t2, valid_lifetime, RelayInfo(IOAddress("0.0.0.0")), id),
203
      siaddr_(IOAddress("0.0.0.0")), match_client_id_(true) {
204
    if (!prefix.isV4()) {
205
206
207
208
209
        isc_throw(BadValue, "Non IPv4 prefix " << prefix.toText()
                  << " specified in subnet4");
    }
}

210
211
void Subnet4::setSiaddr(const isc::asiolink::IOAddress& siaddr) {
    if (!siaddr.isV4()) {
Tomek Mrugalski's avatar
Tomek Mrugalski committed
212
        isc_throw(BadValue, "Can't set siaddr to non-IPv4 address "
213
                  << siaddr);
214
215
216
217
218
219
220
221
    }
    siaddr_ = siaddr;
}

isc::asiolink::IOAddress Subnet4::getSiaddr() const {
    return (siaddr_);
}

222
const PoolCollection& Subnet::getPools(Lease::Type type) const {
223
224
225
    // check if the type is valid (and throw if it isn't)
    checkType(type);

226
    switch (type) {
227
228
    case Lease::TYPE_V4:
    case Lease::TYPE_NA:
229
        return (pools_);
230
    case Lease::TYPE_TA:
231
        return (pools_ta_);
232
    case Lease::TYPE_PD:
233
234
        return (pools_pd_);
    default:
Tomek Mrugalski's avatar
Tomek Mrugalski committed
235
236
        isc_throw(BadValue, "Unsupported pool type: "
                  << static_cast<int>(type));
237
    }
238
}
239

Tomek Mrugalski's avatar
Tomek Mrugalski committed
240
PoolCollection& Subnet::getPoolsWritable(Lease::Type type) {
241
242
    // check if the type is valid (and throw if it isn't)
    checkType(type);
243

244
    switch (type) {
245
246
    case Lease::TYPE_V4:
    case Lease::TYPE_NA:
247
        return (pools_);
248
    case Lease::TYPE_TA:
249
        return (pools_ta_);
250
    case Lease::TYPE_PD:
251
        return (pools_pd_);
252
    default:
253
254
        isc_throw(BadValue, "Invalid pool type specified: "
                  << static_cast<int>(type));
255
    }
256
257
}

Tomek Mrugalski's avatar
Tomek Mrugalski committed
258
const PoolPtr Subnet::getPool(Lease::Type type, const isc::asiolink::IOAddress& hint,
259
                              bool anypool /* true */) const {
260
261
262
263
    // check if the type is valid (and throw if it isn't)
    checkType(type);

    const PoolCollection& pools = getPools(type);
264
265

    PoolPtr candidate;
266

267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
    if (!pools.empty()) {
        // Pools are sorted by their first prefixes. For example: 2001::,
        // 2001::db8::, 3000:: etc. If our hint is 2001:db8:5:: we want to
        // find the pool with the longest matching prefix, so: 2001:db8::,
        // rather than 2001::. upper_bound returns the first pool with a prefix
        // that is greater than 2001:db8:5::, i.e. 3000::. To find the longest
        // matching prefix we use decrement operator to go back by one item.
        // If returned iterator points to begin it means that prefixes in all
        // pools are greater than out prefix, and thus there is no match.
        PoolCollection::const_iterator ub =
            std::upper_bound(pools.begin(), pools.end(), hint,
                             prefixLessThanFirstAddress);

        if (ub != pools.begin()) {
            --ub;
            if ((*ub)->inRange(hint)) {
                candidate = *ub;
            }
285
286
        }

287
288
289
        // If we don't find anything better, then let's just use the first pool
        if (!candidate && anypool) {
            candidate = *pools.begin();
290
291
        }
    }
292
293

    // Return a pool or NULL if no match found.
294
295
296
    return (candidate);
}

297
298
void
Subnet::addPool(const PoolPtr& pool) {
299
300
301
    // check if the type is valid (and throw if it isn't)
    checkType(pool->getType());

302
303
304
305
306
307
308
309
310
311
    // Check that the pool is in range with a subnet only if this is
    // not a pool of IPv6 prefixes. The IPv6 prefixes delegated for
    // the particular subnet don't need to match the prefix of the
    // subnet.
    if (pool->getType() != Lease::TYPE_PD) {
        if (!inRange(pool->getFirstAddress()) || !inRange(pool->getLastAddress())) {
            isc_throw(BadValue, "a pool of type "
                      << Lease::typeToText(pool->getType())
                      << ", with the following address range: "
                      << pool->getFirstAddress() << "-"
312
                      << pool->getLastAddress() << " does not match"
313
314
315
                      << " the prefix of a subnet: "
                      << prefix_ << "/" << static_cast<int>(prefix_len_)
                      << " to which it is being added");
316

317
        }
318
319
    }

320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
    bool overlaps = false;
    if (pool->getType() == Lease::TYPE_V4) {
        overlaps = poolOverlaps(Lease::TYPE_V4, pool);

    } else {
        overlaps =
            poolOverlaps(Lease::TYPE_NA, pool) ||
            poolOverlaps(Lease::TYPE_PD, pool) ||
            poolOverlaps(Lease::TYPE_TA, pool);
    }

    if (overlaps) {
        isc_throw(BadValue,"a pool of type "
                  << Lease::typeToText(pool->getType())
                  << ", with the following address range: "
                  << pool->getFirstAddress() << "-"
                  << pool->getLastAddress() << " overlaps with "
                  "an existing pool in the subnet: "
                  << prefix_ << "/" << static_cast<int>(prefix_len_)
                  << " to which it is being added");
    }

    PoolCollection& pools_writable = getPoolsWritable(pool->getType());
343

344
    // Add the pool to the appropriate pools collection
345
346
347
348
349
    pools_writable.push_back(pool);

    // Sort pools by first address.
    std::sort(pools_writable.begin(), pools_writable.end(),
              comparePoolFirstAddress);
350
351
}

352
353
void
Subnet::delPools(Lease::Type type) {
Tomek Mrugalski's avatar
Tomek Mrugalski committed
354
    getPoolsWritable(type).clear();
355
356
}

357
void
358
Subnet::setIface(const std::string& iface_name) {
359
360
361
    iface_ = iface_name;
}

362
std::string
363
Subnet::getIface() const {
364
365
366
    return (iface_);
}

367
bool
368
Subnet::inPool(Lease::Type type, const isc::asiolink::IOAddress& addr) const {
369
370

    // Let's start with checking if it even belongs to that subnet.
Francis Dupont's avatar
Francis Dupont committed
371
    if ((type != Lease::TYPE_PD) && !inRange(addr)) {
372
373
374
        return (false);
    }

375
376
377
378
    const PoolCollection& pools = getPools(type);

    for (PoolCollection::const_iterator pool = pools.begin();
         pool != pools.end(); ++pool) {
379
380
381
382
        if ((*pool)->inRange(addr)) {
            return (true);
        }
    }
383
    // There's no pool that address belongs to
384
385
386
    return (false);
}

387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
bool
Subnet::poolOverlaps(const Lease::Type& pool_type, const PoolPtr& pool) const {
    const PoolCollection& pools = getPools(pool_type);

    // If no pools, we don't overlap. Nothing to do.
    if (pools.empty()) {
        return (false);
    }

    // We're going to insert a new pool, likely between two existing pools.
    // So we're going to end up with the following case:
    // |<---- pool1 ---->|    |<-------- pool2 ------>|  |<-- pool3 -->|
    // F1               L1    F2                     L2  F3           L3
    // where pool1 and pool3 are existing pools, pool2 is a pool being
    // inserted and "F"/"L" mark first and last address in the pools
    // respectively. So the following conditions must be fulfilled:
    // F2 > L1 and L2 < F3. Obviously, for any pool: F < L.

    // Search for pool3. We use F2 and upper_bound to find the F3 (upper_bound
    // returns first pool in the sorted container which first address is
    // greater than F2). prefixLessThanPoolAddress with the first argument
    // set to "true" is the custom comparison function for upper_bound, which
    // compares F2 with the first addresses of the existing pools.
    PoolCollection::const_iterator pool3_it =
        std::upper_bound(pools.begin(), pools.end(), pool->getFirstAddress(),
                         prefixLessThanFirstAddress);

    // upper_bound returns a first pool which first address is greater than the
    // address F2. However, it is also possible that there is a pool which first
    // address is equal to F2. Such pool is also in conflict with a new pool.
    // If the returned value is pools.begin() it means that all pools have greater
    // first address than F2, thus none of the pools can have first address equal
    // to F2. Otherwise, we'd need to check them for equality.
    if (pool3_it != pools.begin()) {
        // Go back one pool and check if addresses are equal.
        PoolPtr pool3 = *(pool3_it - 1);
        if (pool3->getFirstAddress() == pool->getFirstAddress()) {
            return (true);
        }
    }

    // If returned value is unequal pools.end() it means that there is a pool3,
    // with F3 > F2.
    if (pool3_it != pools.end()) {
        // Let's store the pointer to this pool.
        PoolPtr pool3 = *pool3_it;
        // F3 must be greater than L2, otherwise pools will overlap.
        if (pool3->getFirstAddress() <= pool->getLastAddress()) {
            return (true);
        }
    }

    // If L2 is ok, we now have to find the pool1. This pool should be
    // right before the pool3 if there is any pool before pool3.
    if (pool3_it != pools.begin()) {
        PoolPtr pool1 = *(pool3_it - 1);
        // F2 must be greater than L1.
        if (pool->getFirstAddress() <= pool1->getLastAddress()) {
            return (true);
        }
    }

    return (false);
}


453
454
455
456
Subnet6::Subnet6(const isc::asiolink::IOAddress& prefix, uint8_t length,
                 const Triplet<uint32_t>& t1,
                 const Triplet<uint32_t>& t2,
                 const Triplet<uint32_t>& preferred_lifetime,
457
458
                 const Triplet<uint32_t>& valid_lifetime,
                 const SubnetID id)
459
460
    :Subnet(prefix, length, t1, t2, valid_lifetime, RelayInfo(IOAddress("::")), id),
     preferred_(preferred_lifetime), rapid_commit_(false) {
461
    if (!prefix.isV6()) {
462
        isc_throw(BadValue, "Non IPv6 prefix " << prefix
463
464
465
466
                  << " specified in subnet6");
    }
}

467
468
469
470
471
472
void Subnet6::checkType(Lease::Type type) const {
    if ( (type != Lease::TYPE_NA) && (type != Lease::TYPE_TA) &&
         (type != Lease::TYPE_PD)) {
        isc_throw(BadValue, "Invalid Pool type: " << Lease::typeToText(type)
                  << "(" << static_cast<int>(type)
                  << "), must be TYPE_NA, TYPE_TA or TYPE_PD for Subnet6");
473
474
475
    }
}

476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
data::ElementPtr
Subnet4::toElement() const {
    // Prepare the map
    ElementPtr map = Element::createMap();
    // Set subnet id
    SubnetID id = getID();
    map->set("id", Element::create(static_cast<long long>(id)));
    // Set relay info
    const Subnet::RelayInfo& relay_info = getRelayInfo();
    ElementPtr relay = Element::createMap();
    relay->set("ip-address", Element::create(relay_info.addr_.toText()));
    map->set("relay", relay);
    // Set subnet
    map->set("subnet", Element::create(toText()));
    // Set interface
    const std::string& iface = getIface();
    map->set("interface", Element::create(iface));
    // Set renew-timer
    map->set("renew-timer",
             Element::create(static_cast<long long>
                                 (getT1().get())));
    // Set rebind-timer
    map->set("rebind-timer",
             Element::create(static_cast<long long>
                                 (getT2().get())));
    // Set valid-lifetime
    map->set("valid-lifetime",
             Element::create(static_cast<long long>
                                 (getValid().get())));
    // Set pools
    const PoolCollection& pools = getPools(Lease::TYPE_V4);
    ElementPtr pool_list = Element::createList();
    for (PoolCollection::const_iterator pool = pools.cbegin();
         pool != pools.cend(); ++pool) {
        // Prepare the map for a pool (@todo move this code to pool.cc)
        ElementPtr pool_map = Element::createMap();
        // Set pool
        const IOAddress& first = (*pool)->getFirstAddress();
        const IOAddress& last = (*pool)->getLastAddress();
        std::string range = first.toText() + "-" + last.toText();
        // Try to output a prefix (vs a range)
        int prefix_len = prefixLengthFromRange(first, last);
        if (prefix_len >= 0) {
            std::ostringstream oss;
            oss << first.toText() << "/" << prefix_len;
            range = oss.str();
        }
        pool_map->set("pool", Element::create(range));
        // Set user-context
        ConstElementPtr context = (*pool)->getContext();
        if (!isNull(context)) {
            pool_map->set("user-context", context);
        }
        // Set pool options
        ConstCfgOptionPtr opts = (*pool)->getCfgOption();
        pool_map->set("option-data", opts->toElement());
        // Push on the pool list
        pool_list->add(pool_map);
    }
    map->set("pools", pool_list);
    // Set host reservation-mode
    Subnet::HRMode hrmode = getHostReservationMode();
    std::string mode;
    switch (hrmode) {
    case Subnet::HR_DISABLED:
        mode = "disabled";
        break;
    case Subnet::HR_OUT_OF_POOL:
        mode = "out-of-pool";
        break;
    case Subnet::HR_ALL:
        mode = "all";
        break;
    default:
        isc_throw(ToElementError,
                  "invalid host reservation mode: " << hrmode);
    }
    map->set("reservation-mode", Element::create(mode));
    // Set match-client-id
    map->set("match-client-id",
             Element::create(getMatchClientId()));
    // Set next-server
    map->set("next-server",
             Element::create(getSiaddr().toText()));
    // Set DHCP4o6
    const Cfg4o6& d4o6 = get4o6();
    isc::data::merge(map, d4o6.toElement());
    // Set client-class
    const ClientClasses& cclasses = getClientClasses();
    if (cclasses.size() > 1) {
        isc_throw(ToElementError, "client-class has too many items: "
                  << cclasses.size());
    } else if (!cclasses.empty()) {
        map->set("client-class", Element::create(*cclasses.cbegin()));
    }
    // Set options
    ConstCfgOptionPtr opts = getCfgOption();
    map->set("option-data", opts->toElement());
    // Not supported: interface-id
    // Not supported: rapid-commit

    return (map);
}

data::ElementPtr
Subnet6::toElement() const {
    // Prepare the map
    ElementPtr map = Element::createMap();
    // Set subnet id
    SubnetID id = getID();
    map->set("id", Element::create(static_cast<long long>(id)));
    // Set relay info
    const Subnet::RelayInfo& relay_info = getRelayInfo();
    ElementPtr relay = Element::createMap();
    relay->set("ip-address", Element::create(relay_info.addr_.toText()));
    map->set("relay", relay);
    // Set subnet
    map->set("subnet", Element::create(toText()));
    // Set interface
    const std::string& iface = getIface();
    map->set("interface", Element::create(iface));
    // Set interface-id
    const OptionPtr& ifaceid = getInterfaceId();
    if (ifaceid) {
        std::vector<uint8_t> bin = ifaceid->getData();
        std::string ifid;
        ifid.resize(bin.size());
        if (!bin.empty()) {
            std::memcpy(&ifid[0], &bin[0], bin.size());
        }
        map->set("interface-id", Element::create(ifid));
    } else {
        map->set("interface-id", Element::create(std::string()));
    }
    // Set renew-timer
    map->set("renew-timer",
             Element::create(static_cast<long long>
                             (getT1().get())));
    // Set rebind-timer
    map->set("rebind-timer",
             Element::create(static_cast<long long>
                             (getT2().get())));
    // Set preferred-lifetime
    map->set("preferred-lifetime",
             Element::create(static_cast<long long>
                             (getPreferred().get())));
    // Set valid-lifetime
    map->set("valid-lifetime",
             Element::create(static_cast<long long>
                             (getValid().get())));
    // Set rapid-commit
    bool rapid_commit = getRapidCommit();
    map->set("rapid-commit", Element::create(rapid_commit));
    // Set pools
    const PoolCollection& pools = getPools(Lease::TYPE_NA);
    ElementPtr pool_list = Element::createList();
    for (PoolCollection::const_iterator pool = pools.cbegin();
         pool != pools.cend(); ++pool) {
        // Prepare the map for a pool (@todo move this code to pool.cc)
        ElementPtr pool_map = Element::createMap();
        // Set pool
        const IOAddress& first = (*pool)->getFirstAddress();
        const IOAddress& last = (*pool)->getLastAddress();
        std::string range = first.toText() + "-" + last.toText();
        // Try to output a prefix (vs a range)
        int prefix_len = prefixLengthFromRange(first, last);
        if (prefix_len >= 0) {
            std::ostringstream oss;
            oss << first.toText() << "/" << prefix_len;
            range = oss.str();
        }
        pool_map->set("pool", Element::create(range));
        // Set user-context
        ConstElementPtr context = (*pool)->getContext();
        if (!isNull(context)) {
            pool_map->set("user-context", context);
        }
        // Set pool options
        ConstCfgOptionPtr opts = (*pool)->getCfgOption();
        pool_map->set("option-data", opts->toElement());
        // Push on the pool list
        pool_list->add(pool_map);
    }
    map->set("pools", pool_list);
    // Set pd-pools
    const PoolCollection& pdpools = getPools(Lease::TYPE_PD);
    ElementPtr pdpool_list = Element::createList();
    for (PoolCollection::const_iterator pool = pdpools.cbegin();
         pool != pdpools.cend(); ++pool) {
        // Get it as a Pool6 (@todo move this code to pool.cc)
        const Pool6* pdpool = dynamic_cast<Pool6*>(pool->get());
        if (!pdpool) {
            isc_throw(ToElementError, "invalid pd-pool pointer");
        }
        // Prepare the map for a pd-pool
        ElementPtr pool_map = Element::createMap();
        // Set prefix
        const IOAddress& prefix = pdpool->getFirstAddress();
        pool_map->set("prefix", Element::create(prefix.toText()));
        // Set prefix-len (get it from min - max)
        const IOAddress& last = pdpool->getLastAddress();
        int prefix_len = prefixLengthFromRange(prefix, last);
        if (prefix_len < 0) {
            // The pool is bad: give up
            isc_throw(ToElementError, "invalid prefix range "
                      << prefix.toText() << "-" << last.toText());
        }
        pool_map->set("prefix-len", Element::create(prefix_len));
        // Set delegated-len
        uint8_t len = pdpool->getLength();
        pool_map->set("delegated-len",
                      Element::create(static_cast<int>(len)));
        // Set excluded prefix
        const Option6PDExcludePtr& xopt =
            pdpool->getPrefixExcludeOption();
        if (xopt) {
            const IOAddress& xprefix =
                xopt->getExcludedPrefix(prefix, len);
            pool_map->set("excluded-prefix",
                          Element::create(xprefix.toText()));
            uint8_t xlen = xopt->getExcludedPrefixLength();
            pool_map->set("excluded-prefix-len",
                          Element::create(static_cast<int>(xlen)));
        } else {
            pool_map->set("excluded-prefix",
                          Element::create(std::string("::")));
            pool_map->set("excluded-prefix-len", Element::create(0));
        }
        // Set user-context
        ConstElementPtr context = pdpool->getContext();
        if (!isNull(context)) {
            pool_map->set("user-context", context);
        }
        // Set pool options
        ConstCfgOptionPtr opts = pdpool->getCfgOption();
        pool_map->set("option-data", opts->toElement());
        // Push on the pool list
        pdpool_list->add(pool_map);
    }
    map->set("pd-pools", pdpool_list);
    // Set host reservation-mode
    Subnet::HRMode hrmode = getHostReservationMode();
    std::string mode;
    switch (hrmode) {
    case Subnet::HR_DISABLED:
        mode = "disabled";
        break;
    case Subnet::HR_OUT_OF_POOL:
        mode = "out-of-pool";
        break;
    case Subnet::HR_ALL:
        mode = "all";
        break;
    default:
        isc_throw(ToElementError,
                  "invalid host reservation mode: " << hrmode);
    }
    map->set("reservation-mode", Element::create(mode));
    // Set client-class
    const ClientClasses& cclasses = getClientClasses();
    if (cclasses.size() > 1) {
        isc_throw(ToElementError, "client-class has too many items: "
                  << cclasses.size());
    } else if (!cclasses.empty()) {
        map->set("client-class", Element::create(*cclasses.cbegin()));
    }
    // Set options
    ConstCfgOptionPtr opts = getCfgOption();
    map->set("option-data", opts->toElement());

    return (map);
}


750
751
} // end of isc::dhcp namespace
} // end of isc namespace