forked from richardcochran/linuxptp
-
Notifications
You must be signed in to change notification settings - Fork 0
/
port.c
2022 lines (1768 loc) · 49.4 KB
/
port.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
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
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
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
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
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
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
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
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/**
* @file port.c
* @note Copyright (C) 2011 Richard Cochran <[email protected]>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <arpa/inet.h>
#include <errno.h>
#include <malloc.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "bmc.h"
#include "clock.h"
#include "mave.h"
#include "missing.h"
#include "msg.h"
#include "port.h"
#include "print.h"
#include "sk.h"
#include "tlv.h"
#include "tmtab.h"
#include "tmv.h"
#include "util.h"
#define ALLOWED_LOST_RESPONSES 3
#define PORT_MAVE_LENGTH 10
struct nrate_estimator {
double ratio;
tmv_t origin1;
tmv_t ingress1;
unsigned int max_count;
unsigned int count;
};
struct port {
char *name;
struct clock *clock;
struct transport *trp;
enum timestamp_type timestamping;
struct fdarray fda;
struct foreign_clock *best;
struct ptp_message *last_follow_up;
struct ptp_message *last_sync;
struct ptp_message *delay_req;
struct ptp_message *peer_delay_req;
struct ptp_message *peer_delay_resp;
struct ptp_message *peer_delay_fup;
struct {
UInteger16 announce;
UInteger16 delayreq;
UInteger16 sync;
} seqnum;
struct tmtab tmtab;
tmv_t peer_delay;
struct mave *avg_delay;
int log_sync_interval;
struct nrate_estimator nrate;
unsigned int pdr_missing;
/* portDS */
struct port_defaults pod;
struct PortIdentity portIdentity;
enum port_state state; /*portState*/
Integer8 logMinDelayReqInterval;
TimeInterval peerMeanPathDelay;
Integer8 logAnnounceInterval;
UInteger8 announceReceiptTimeout;
UInteger8 transportSpecific;
Integer8 logSyncInterval;
Enumeration8 delayMechanism;
Integer8 logMinPdelayReqInterval;
unsigned int versionNumber; /*UInteger4*/
/* foreignMasterDS */
LIST_HEAD(fm, foreign_clock) foreign_masters;
};
#define portnum(p) (p->portIdentity.portNumber)
#define NSEC2SEC 1000000000LL
static int port_capable(struct port *p);
static int port_is_ieee8021as(struct port *p);
static int announce_compare(struct ptp_message *m1, struct ptp_message *m2)
{
struct announce_msg *a = &m1->announce, *b = &m2->announce;
int len =
sizeof(a->grandmasterPriority1) +
sizeof(a->grandmasterClockQuality) +
sizeof(a->grandmasterPriority2) +
sizeof(a->grandmasterIdentity) +
sizeof(a->stepsRemoved);
return memcmp(&a->grandmasterPriority1, &b->grandmasterPriority1, len);
}
static void announce_to_dataset(struct ptp_message *m, struct clock *c,
struct dataset *out)
{
struct announce_msg *a = &m->announce;
out->priority1 = a->grandmasterPriority1;
out->identity = a->grandmasterIdentity;
out->quality = a->grandmasterClockQuality;
out->priority2 = a->grandmasterPriority2;
out->stepsRemoved = a->stepsRemoved;
out->sender = m->header.sourcePortIdentity;
out->receiver = clock_parent_identity(c);
}
static int msg_current(struct ptp_message *m, struct timespec now)
{
int64_t t1, t2, tmo;
t1 = m->ts.host.tv_sec * NSEC2SEC + m->ts.host.tv_nsec;
t2 = now.tv_sec * NSEC2SEC + now.tv_nsec;
if (m->header.logMessageInterval < 0)
tmo = 4LL * NSEC2SEC / (1 << -m->header.logMessageInterval);
else
tmo = 4LL * (1 << m->header.logMessageInterval) * NSEC2SEC;
return t2 - t1 < tmo;
}
static int msg_source_equal(struct ptp_message *m1, struct foreign_clock *fc)
{
struct PortIdentity *id1, *id2;
id1 = &m1->header.sourcePortIdentity;
id2 = &fc->dataset.sender;
return 0 == memcmp(id1, id2, sizeof(*id1));
}
static int pid_eq(struct PortIdentity *a, struct PortIdentity *b)
{
return 0 == memcmp(a, b, sizeof(*a));
}
static int source_pid_eq(struct ptp_message *m1, struct ptp_message *m2)
{
return pid_eq(&m1->header.sourcePortIdentity,
&m2->header.sourcePortIdentity);
}
int set_tmo(int fd, unsigned int scale, int log_seconds)
{
struct itimerspec tmo = {
{0, 0}, {0, 0}
};
uint64_t ns;
int i;
if (log_seconds < 0) {
log_seconds *= -1;
for (i = 1, ns = scale * 500000000ULL; i < log_seconds; i++) {
ns >>= 1;
}
tmo.it_value.tv_nsec = ns;
while (tmo.it_value.tv_nsec >= NS_PER_SEC) {
tmo.it_value.tv_nsec -= NS_PER_SEC;
tmo.it_value.tv_sec++;
}
} else
tmo.it_value.tv_sec = scale * (1 << log_seconds);
return timerfd_settime(fd, 0, &tmo, NULL);
}
static void fc_clear(struct foreign_clock *fc)
{
struct ptp_message *m;
while (fc->n_messages) {
m = TAILQ_LAST(&fc->messages, messages);
TAILQ_REMOVE(&fc->messages, m, list);
fc->n_messages--;
msg_put(m);
}
}
static void fc_prune(struct foreign_clock *fc)
{
struct timespec now;
struct ptp_message *m;
clock_gettime(CLOCK_MONOTONIC, &now);
while (fc->n_messages > FOREIGN_MASTER_THRESHOLD) {
m = TAILQ_LAST(&fc->messages, messages);
TAILQ_REMOVE(&fc->messages, m, list);
fc->n_messages--;
msg_put(m);
}
while (!TAILQ_EMPTY(&fc->messages)) {
m = TAILQ_LAST(&fc->messages, messages);
if (msg_current(m, now))
break;
TAILQ_REMOVE(&fc->messages, m, list);
fc->n_messages--;
msg_put(m);
}
}
static void ts_to_timestamp(struct timespec *src, struct Timestamp *dst)
{
dst->seconds_lsb = src->tv_sec;
dst->seconds_msb = 0;
dst->nanoseconds = src->tv_nsec;
}
/*
* Returns non-zero if the announce message is different than last.
*/
static int add_foreign_master(struct port *p, struct ptp_message *m)
{
struct foreign_clock *fc;
struct ptp_message *tmp;
int broke_threshold = 0, diff = 0;
LIST_FOREACH(fc, &p->foreign_masters, list) {
if (msg_source_equal(m, fc))
break;
}
if (!fc) {
pr_notice("port %hu: new foreign master %s", portnum(p),
pid2str(&m->header.sourcePortIdentity));
fc = malloc(sizeof(*fc));
if (!fc) {
pr_err("low memory, failed to add foreign master");
return 0;
}
memset(fc, 0, sizeof(*fc));
LIST_INSERT_HEAD(&p->foreign_masters, fc, list);
fc->port = p;
fc->dataset.sender = m->header.sourcePortIdentity;
/* We do not count this first message, see 9.5.3(b) */
return 0;
}
/*
* If this message breaks the threshold, that is an important change.
*/
fc_prune(fc);
if (FOREIGN_MASTER_THRESHOLD - 1 == fc->n_messages)
broke_threshold = 1;
/*
* Okay, go ahead and add this announcement.
*/
msg_get(m);
fc->n_messages++;
TAILQ_INSERT_HEAD(&fc->messages, m, list);
/*
* Test if this announcement contains changed information.
*/
if (fc->n_messages > 1) {
tmp = TAILQ_NEXT(m, list);
diff = announce_compare(m, tmp);
}
return broke_threshold || diff;
}
static int follow_up_info_append(struct port *p, struct ptp_message *m)
{
struct follow_up_info_tlv *fui;
fui = (struct follow_up_info_tlv *) m->follow_up.suffix;
fui->type = TLV_ORGANIZATION_EXTENSION;
fui->length = sizeof(*fui) - sizeof(fui->type) - sizeof(fui->length);
memcpy(fui->id, ieee8021_id, sizeof(ieee8021_id));
fui->subtype[2] = 1;
m->tlv_count = 1;
return sizeof(*fui);
}
static struct follow_up_info_tlv *follow_up_info_extract(struct ptp_message *m)
{
struct follow_up_info_tlv *f;
f = (struct follow_up_info_tlv *) m->follow_up.suffix;
if (m->tlv_count != 1 ||
f->type != TLV_ORGANIZATION_EXTENSION ||
f->length != sizeof(*f) - sizeof(f->type) - sizeof(f->length) ||
// memcmp(f->id, ieee8021_id, sizeof(ieee8021_id)) ||
f->subtype[0] || f->subtype[1] || f->subtype[2] != 1) {
return NULL;
}
return f;
}
static void free_foreign_masters(struct port *p)
{
struct foreign_clock *fc;
while ((fc = LIST_FIRST(&p->foreign_masters)) != NULL) {
LIST_REMOVE(fc, list);
fc_clear(fc);
free(fc);
}
}
static int incapable_ignore(struct port *p, struct ptp_message *m)
{
if (port_capable(p)) {
return 0;
}
if (msg_type(m) == ANNOUNCE || msg_type(m) == SYNC) {
return 1;
}
return 0;
}
static int path_trace_append(struct port *p, struct ptp_message *m,
struct parent_ds *dad)
{
struct path_trace_tlv *ptt;
int length = 1 + dad->path_length;
if (length > PATH_TRACE_MAX) {
return 0;
}
ptt = (struct path_trace_tlv *) m->announce.suffix;
ptt->type = TLV_PATH_TRACE;
ptt->length = length * sizeof(struct ClockIdentity);
memcpy(ptt->cid, dad->ptl, ptt->length);
ptt->cid[length - 1] = clock_identity(p->clock);
m->tlv_count = 1;
return ptt->length + sizeof(ptt->type) + sizeof(ptt->length);
}
static int path_trace_ignore(struct port *p, struct ptp_message *m)
{
struct ClockIdentity cid;
struct path_trace_tlv *ptt;
int i, cnt;
if (!p->pod.path_trace_enabled) {
return 0;
}
if (msg_type(m) != ANNOUNCE) {
return 0;
}
if (m->tlv_count != 1) {
return 1;
}
ptt = (struct path_trace_tlv *) m->announce.suffix;
if (ptt->type != TLV_PATH_TRACE) {
return 1;
}
cnt = path_length(ptt);
cid = clock_identity(p->clock);
for (i = 0; i < cnt; i++) {
if (0 == memcmp(&ptt->cid[i], &cid, sizeof(cid)))
return 1;
}
return 0;
}
static int port_capable(struct port *p)
{
if (!port_is_ieee8021as(p)) {
/* Normal 1588 ports are always capable. */
return 1;
}
/*
* TODO - Compare p->peer_delay with neighborPropDelayThresh.
*/
if (p->pdr_missing > ALLOWED_LOST_RESPONSES) {
return 0;
}
return 1;
}
static int port_clr_tmo(int fd)
{
struct itimerspec tmo = {
{0, 0}, {0, 0}
};
return timerfd_settime(fd, 0, &tmo, NULL);
}
static int port_ignore(struct port *p, struct ptp_message *m)
{
struct ClockIdentity c1, c2;
if (incapable_ignore(p, m)) {
return 1;
}
if (path_trace_ignore(p, m)) {
return 1;
}
if (msg_transport_specific(m) != p->transportSpecific) {
return 1;
}
if (pid_eq(&m->header.sourcePortIdentity, &p->portIdentity)) {
return 1;
}
if (m->header.domainNumber != clock_domain_number(p->clock)) {
return 1;
}
c1 = clock_identity(p->clock);
c2 = m->header.sourcePortIdentity.clockIdentity;
if (0 == memcmp(&c1, &c2, sizeof(c1))) {
return 1;
}
return 0;
}
static int port_is_ieee8021as(struct port *p)
{
return p->pod.follow_up_info ? 1 : 0;
}
static void port_management_send_error(struct port *p, struct port *ingress,
struct ptp_message *msg, int error_id)
{
if (port_management_error(p->portIdentity, ingress, msg, error_id))
pr_err("port %hu: management error failed", portnum(p));
}
static const Octet profile_id_drr[] = {0x00, 0x1B, 0x19, 0x00, 0x01, 0x00};
static const Octet profile_id_p2p[] = {0x00, 0x1B, 0x19, 0x00, 0x02, 0x00};
static int port_management_get_response(struct port *target,
struct port *ingress, int id,
struct ptp_message *req)
{
int datalen = 0, err, pdulen, respond = 0;
struct management_tlv *tlv;
struct management_tlv_datum *mtd;
struct ptp_message *rsp;
struct portDS *pds;
struct PortIdentity pid = port_identity(target);
struct clock_description *desc;
struct mgmt_clock_description *cd;
uint8_t *buf;
uint16_t u16;
rsp = port_management_reply(pid, ingress, req);
if (!rsp) {
return 0;
}
tlv = (struct management_tlv *) rsp->management.suffix;
tlv->type = TLV_MANAGEMENT;
tlv->id = id;
switch (id) {
case NULL_MANAGEMENT:
datalen = 0;
respond = 1;
break;
case CLOCK_DESCRIPTION:
cd = &rsp->last_tlv.cd;
buf = tlv->data;
cd->clockType = (UInteger16 *) buf;
buf += sizeof(*cd->clockType);
if (clock_num_ports(target->clock) > 1) {
*cd->clockType = CLOCK_TYPE_BOUNDARY;
} else {
*cd->clockType = CLOCK_TYPE_ORDINARY;
}
cd->physicalLayerProtocol = (struct PTPText *) buf;
switch(transport_type(target->trp)) {
case TRANS_UDP_IPV4:
case TRANS_UDP_IPV6:
case TRANS_IEEE_802_3:
ptp_text_set(cd->physicalLayerProtocol, "IEEE 802.3");
break;
default:
ptp_text_set(cd->physicalLayerProtocol, NULL);
break;
}
buf += sizeof(struct PTPText) + cd->physicalLayerProtocol->length;
cd->physicalAddress = (struct PhysicalAddress *) buf;
u16 = transport_physical_addr(target->trp,
cd->physicalAddress->address);
memcpy(&cd->physicalAddress->length, &u16, 2);
buf += sizeof(struct PhysicalAddress) + u16;
cd->protocolAddress = (struct PortAddress *) buf;
u16 = transport_type(target->trp);
memcpy(&cd->protocolAddress->networkProtocol, &u16, 2);
u16 = transport_protocol_addr(target->trp,
cd->protocolAddress->address);
memcpy(&cd->protocolAddress->addressLength, &u16, 2);
buf += sizeof(struct PortAddress) + u16;
desc = clock_description(target->clock);
cd->manufacturerIdentity = buf;
memcpy(cd->manufacturerIdentity,
desc->manufacturerIdentity, OUI_LEN);
buf += OUI_LEN;
*(buf++) = 0; /* reserved */
cd->productDescription = (struct PTPText *) buf;
ptp_text_copy(cd->productDescription, &desc->productDescription);
buf += sizeof(struct PTPText) + cd->productDescription->length;
cd->revisionData = (struct PTPText *) buf;
ptp_text_copy(cd->revisionData, &desc->revisionData);
buf += sizeof(struct PTPText) + cd->revisionData->length;
cd->userDescription = (struct PTPText *) buf;
ptp_text_copy(cd->userDescription, &desc->userDescription);
buf += sizeof(struct PTPText) + cd->userDescription->length;
if (target->delayMechanism == DM_P2P) {
memcpy(buf, profile_id_p2p, PROFILE_ID_LEN);
} else {
memcpy(buf, profile_id_drr, PROFILE_ID_LEN);
}
buf += PROFILE_ID_LEN;
datalen = buf - tlv->data;
respond = 1;
break;
case PORT_DATA_SET:
pds = (struct portDS *) tlv->data;
pds->portIdentity = target->portIdentity;
if (target->state == PS_GRAND_MASTER) {
pds->portState = PS_MASTER;
} else {
pds->portState = target->state;
}
pds->logMinDelayReqInterval = target->logMinDelayReqInterval;
pds->peerMeanPathDelay = target->peerMeanPathDelay;
pds->logAnnounceInterval = target->logAnnounceInterval;
pds->announceReceiptTimeout = target->announceReceiptTimeout;
pds->logSyncInterval = target->logSyncInterval;
if (target->delayMechanism) {
pds->delayMechanism = target->delayMechanism;
} else {
pds->delayMechanism = DM_E2E;
}
pds->logMinPdelayReqInterval = target->logMinPdelayReqInterval;
pds->versionNumber = target->versionNumber;
datalen = sizeof(*pds);
respond = 1;
break;
case LOG_ANNOUNCE_INTERVAL:
mtd = (struct management_tlv_datum *) tlv->data;
mtd->val = target->logAnnounceInterval;
datalen = sizeof(*mtd);
respond = 1;
break;
case ANNOUNCE_RECEIPT_TIMEOUT:
mtd = (struct management_tlv_datum *) tlv->data;
mtd->val = target->announceReceiptTimeout;
datalen = sizeof(*mtd);
respond = 1;
break;
case LOG_SYNC_INTERVAL:
mtd = (struct management_tlv_datum *) tlv->data;
mtd->val = target->logSyncInterval;
datalen = sizeof(*mtd);
respond = 1;
break;
case VERSION_NUMBER:
mtd = (struct management_tlv_datum *) tlv->data;
mtd->val = target->versionNumber;
datalen = sizeof(*mtd);
respond = 1;
break;
case DELAY_MECHANISM:
mtd = (struct management_tlv_datum *) tlv->data;
if (target->delayMechanism)
mtd->val = target->delayMechanism;
else
mtd->val = DM_E2E;
datalen = sizeof(*mtd);
respond = 1;
break;
case LOG_MIN_PDELAY_REQ_INTERVAL:
mtd = (struct management_tlv_datum *) tlv->data;
mtd->val = target->logMinPdelayReqInterval;
datalen = sizeof(*mtd);
respond = 1;
break;
}
if (respond) {
if (datalen % 2) {
tlv->data[datalen] = 0;
datalen++;
}
tlv->length = sizeof(tlv->id) + datalen;
pdulen = rsp->header.messageLength + sizeof(*tlv) + datalen;
rsp->header.messageLength = pdulen;
rsp->tlv_count = 1;
err = msg_pre_send(rsp);
if (err) {
goto out;
}
err = port_forward(ingress, rsp, pdulen);
}
out:
msg_put(rsp);
return respond ? 1 : 0;
}
static int port_management_set(struct port *target,
struct port *ingress, int id,
struct ptp_message *req)
{
int respond = 0;
switch (id) {
}
if (respond && !port_management_get_response(target, ingress, id, req))
pr_err("port %hu: failed to send management set response", portnum(target));
return respond ? 1 : 0;
}
static void port_nrate_calculate(struct port *p, tmv_t t3, tmv_t t4, tmv_t c)
{
tmv_t origin2;
struct nrate_estimator *n = &p->nrate;
if (!n->ingress1) {
n->ingress1 = t4;
n->origin1 = tmv_add(t3, c);
return;
}
n->count++;
if (n->count < n->max_count) {
return;
}
origin2 = tmv_add(t3, c);
if (tmv_eq(t4, n->ingress1)) {
pr_warning("bad timestamps in nrate calculation");
return;
}
n->ratio =
tmv_dbl(tmv_sub(origin2, n->origin1)) /
tmv_dbl(tmv_sub(t4, n->ingress1));
n->ingress1 = t4;
n->origin1 = origin2;
n->count = 0;
/*
* We experienced a successful series of exchanges of peer
* delay request and response, and so the port is now capable.
*/
p->pdr_missing = 0;
}
static void port_nrate_initialize(struct port *p)
{
int shift = p->pod.freq_est_interval - p->logMinPdelayReqInterval;
if (shift < 0)
shift = 0;
else if (shift >= sizeof(int) * 8) {
shift = sizeof(int) * 8 - 1;
pr_warning("freq_est_interval is too long");
}
/* We start in the 'incapable' state. */
p->pdr_missing = ALLOWED_LOST_RESPONSES + 1;
p->nrate.origin1 = tmv_zero();
p->nrate.ingress1 = tmv_zero();
p->nrate.max_count = (1 << shift);
p->nrate.count = 0;
}
static int port_set_announce_tmo(struct port *p)
{
return set_tmo(p->fda.fd[FD_ANNOUNCE_TIMER],
p->announceReceiptTimeout, p->logAnnounceInterval);
}
static int port_set_delay_tmo(struct port *p)
{
struct itimerspec tmo = {
{0, 0}, {0, 0}
};
int index;
if (p->delayMechanism == DM_P2P) {
return set_tmo(p->fda.fd[FD_DELAY_TIMER], 1,
p->logMinPdelayReqInterval);
}
index = random() % TMTAB_MAX;
tmo.it_value = p->tmtab.ts[index];
return timerfd_settime(p->fda.fd[FD_DELAY_TIMER], 0, &tmo, NULL);
}
static int port_set_manno_tmo(struct port *p)
{
return set_tmo(p->fda.fd[FD_MANNO_TIMER], 1, p->logAnnounceInterval);
}
static int port_set_qualification_tmo(struct port *p)
{
return set_tmo(p->fda.fd[FD_QUALIFICATION_TIMER],
1+clock_steps_removed(p->clock), p->logAnnounceInterval);
}
static int port_set_sync_tmo(struct port *p)
{
return set_tmo(p->fda.fd[FD_SYNC_TIMER], 1, p->logSyncInterval);
}
static void port_show_transition(struct port *p,
enum port_state next, enum fsm_event event)
{
pr_notice("port %hu: %s to %s on %s", portnum(p),
ps_str[p->state], ps_str[next], ev_str[event]);
}
static void port_slave_priority_warning(struct port *p)
{
UInteger16 n = portnum(p);
pr_warning("port %hu: master state recommended in slave only mode", n);
pr_warning("port %hu: defaultDS.priority1 probably misconfigured", n);
}
static void port_synchronize(struct port *p,
struct timespec ingress_ts,
struct timestamp origin_ts,
Integer64 correction1, Integer64 correction2)
{
enum servo_state state;
state = clock_synchronize(p->clock, ingress_ts, origin_ts,
correction1, correction2);
switch (state) {
case SERVO_UNLOCKED:
port_dispatch(p, EV_SYNCHRONIZATION_FAULT, 0);
break;
case SERVO_JUMP:
port_dispatch(p, EV_SYNCHRONIZATION_FAULT, 0);
if (p->delay_req) {
msg_put(p->delay_req);
p->delay_req = NULL;
}
if (p->peer_delay_req) {
msg_put(p->peer_delay_req);
p->peer_delay_req = NULL;
}
break;
case SERVO_LOCKED:
port_dispatch(p, EV_MASTER_CLOCK_SELECTED, 0);
break;
}
}
static int port_pdelay_request(struct port *p)
{
struct ptp_message *msg;
int cnt, pdulen;
msg = msg_allocate();
if (!msg)
return -1;
pdulen = sizeof(struct pdelay_req_msg);
msg->hwts.type = p->timestamping;
msg->header.tsmt = PDELAY_REQ | p->transportSpecific;
msg->header.ver = PTP_VERSION;
msg->header.messageLength = pdulen;
msg->header.domainNumber = clock_domain_number(p->clock);
msg->header.correction = -p->pod.asymmetry;
msg->header.sourcePortIdentity = p->portIdentity;
msg->header.sequenceId = p->seqnum.delayreq++;
msg->header.control = CTL_OTHER;
msg->header.logMessageInterval = port_is_ieee8021as(p) ?
p->logMinPdelayReqInterval : 0x7f;
if (msg_pre_send(msg))
goto out;
cnt = transport_peer(p->trp, &p->fda, 1, msg, pdulen, &msg->hwts);
if (cnt <= 0) {
pr_err("port %hu: send peer delay request failed", portnum(p));
goto out;
}
if (msg_sots_missing(msg)) {
pr_err("missing timestamp on transmitted peer delay request");
goto out;
}
if (p->peer_delay_req) {
if (port_capable(p)) {
p->pdr_missing++;
}
msg_put(p->peer_delay_req);
}
p->peer_delay_req = msg;
return 0;
out:
msg_put(msg);
return -1;
}
static int port_delay_request(struct port *p)
{
struct ptp_message *msg;
int cnt, pdulen;
if (p->delayMechanism == DM_P2P)
return port_pdelay_request(p);
msg = msg_allocate();
if (!msg)
return -1;
pdulen = sizeof(struct delay_req_msg);
msg->hwts.type = p->timestamping;
msg->header.tsmt = DELAY_REQ | p->transportSpecific;
msg->header.ver = PTP_VERSION;
msg->header.messageLength = pdulen;
msg->header.domainNumber = clock_domain_number(p->clock);
msg->header.correction = -p->pod.asymmetry;
msg->header.sourcePortIdentity = p->portIdentity;
msg->header.sequenceId = p->seqnum.delayreq++;
msg->header.control = CTL_DELAY_REQ;
msg->header.logMessageInterval = 0x7f;
if (msg_pre_send(msg))
goto out;
cnt = transport_send(p->trp, &p->fda, 1, msg, pdulen, &msg->hwts);
if (cnt <= 0) {
pr_err("port %hu: send delay request failed", portnum(p));
goto out;
}
if (msg_sots_missing(msg)) {
pr_err("missing timestamp on transmitted delay request");
goto out;
}
if (p->delay_req)
msg_put(p->delay_req);
p->delay_req = msg;
return 0;
out:
msg_put(msg);
return -1;
}
static int port_tx_announce(struct port *p)
{
struct parent_ds *dad = clock_parent_ds(p->clock);
struct timePropertiesDS *tp = clock_time_properties(p->clock);
struct ptp_message *msg;
int cnt, err = 0, pdulen;
if (!port_capable(p)) {
return 0;
}
msg = msg_allocate();
if (!msg)
return -1;
pdulen = sizeof(struct announce_msg);
msg->hwts.type = p->timestamping;
if (p->pod.path_trace_enabled)
pdulen += path_trace_append(p, msg, dad);
msg->header.tsmt = ANNOUNCE | p->transportSpecific;
msg->header.ver = PTP_VERSION;
msg->header.messageLength = pdulen;
msg->header.domainNumber = clock_domain_number(p->clock);
msg->header.sourcePortIdentity = p->portIdentity;
msg->header.sequenceId = p->seqnum.announce++;
msg->header.control = CTL_OTHER;
msg->header.logMessageInterval = p->logAnnounceInterval;
msg->header.flagField[1] = tp->flags;
msg->announce.currentUtcOffset = tp->currentUtcOffset;
msg->announce.grandmasterPriority1 = dad->pds.grandmasterPriority1;
msg->announce.grandmasterClockQuality = dad->pds.grandmasterClockQuality;
msg->announce.grandmasterPriority2 = dad->pds.grandmasterPriority2;
msg->announce.grandmasterIdentity = dad->pds.grandmasterIdentity;
msg->announce.stepsRemoved = clock_steps_removed(p->clock);
msg->announce.timeSource = tp->timeSource;
if (msg_pre_send(msg)) {
err = -1;
goto out;
}
cnt = transport_send(p->trp, &p->fda, 0, msg, pdulen, &msg->hwts);
if (cnt <= 0) {
pr_err("port %hu: send announce failed", portnum(p));
err = -1;
}
out:
msg_put(msg);
return err;
}
static int port_tx_sync(struct port *p)
{
struct ptp_message *msg, *fup;
int cnt, err = 0, pdulen;
int event = p->timestamping == TS_ONESTEP ? TRANS_ONESTEP : TRANS_EVENT;
if (!port_capable(p)) {
return 0;
}
msg = msg_allocate();
if (!msg)
return -1;
fup = msg_allocate();
if (!fup) {
msg_put(msg);
return -1;
}
pdulen = sizeof(struct sync_msg);
msg->hwts.type = p->timestamping;
msg->header.tsmt = SYNC | p->transportSpecific;
msg->header.ver = PTP_VERSION;
msg->header.messageLength = pdulen;
msg->header.domainNumber = clock_domain_number(p->clock);
msg->header.sourcePortIdentity = p->portIdentity;
msg->header.sequenceId = p->seqnum.sync++;
msg->header.control = CTL_SYNC;
msg->header.logMessageInterval = p->logSyncInterval;
if (p->timestamping != TS_ONESTEP)
msg->header.flagField[0] |= TWO_STEP;
if (msg_pre_send(msg)) {
err = -1;
goto out;
}
cnt = transport_send(p->trp, &p->fda, event, msg, pdulen, &msg->hwts);
if (cnt <= 0) {
pr_err("port %hu: send sync failed", portnum(p));
err = -1;
goto out;
}
if (p->timestamping == TS_ONESTEP) {
goto out;
} else if (msg_sots_missing(msg)) {
pr_err("missing timestamp on transmitted sync");
err = -1;
goto out;
}
/*
* Send the follow up message right away.
*/
pdulen = sizeof(struct follow_up_msg);
fup->hwts.type = p->timestamping;
if (p->pod.follow_up_info)
pdulen += follow_up_info_append(p, fup);
fup->header.tsmt = FOLLOW_UP | p->transportSpecific;
fup->header.ver = PTP_VERSION;
fup->header.messageLength = pdulen;
fup->header.domainNumber = clock_domain_number(p->clock);
fup->header.sourcePortIdentity = p->portIdentity;
fup->header.sequenceId = p->seqnum.sync - 1;
fup->header.control = CTL_FOLLOW_UP;
fup->header.logMessageInterval = p->logSyncInterval;
ts_to_timestamp(&msg->hwts.ts, &fup->follow_up.preciseOriginTimestamp);
if (msg_pre_send(fup)) {
err = -1;
goto out;
}
cnt = transport_send(p->trp, &p->fda, 0, fup, pdulen, &fup->hwts);
if (cnt <= 0) {
pr_err("port %hu: send follow up failed", portnum(p));
err = -1;
}
out:
msg_put(msg);
msg_put(fup);
return err;
}