summaryrefslogtreecommitdiffstats
path: root/bgpd/bgpd.h
blob: 0f69095323b11ee568c8a1e8be5f9020072b36ac (plain)
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
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
// SPDX-License-Identifier: GPL-2.0-or-later
/* BGP message definition header.
 * Copyright (C) 1996, 97, 98, 99, 2000 Kunihiro Ishiguro
 */

#ifndef _QUAGGA_BGPD_H
#define _QUAGGA_BGPD_H

#include "qobj.h"
#include <pthread.h>

#include "hook.h"
#include "frr_pthread.h"
#include "lib/json.h"
#include "vrf.h"
#include "vty.h"
#include "srv6.h"
#include "iana_afi.h"
#include "asn.h"

/* For union sockunion.  */
#include "queue.h"
#include "sockunion.h"
#include "routemap.h"
#include "linklist.h"
#include "defaults.h"
#include "bgp_memory.h"
#include "bitfield.h"
#include "vxlan.h"
#include "bgp_labelpool.h"
#include "bgp_addpath_types.h"
#include "bgp_nexthop.h"
#include "bgp_io.h"

#include "lib/bfd.h"

DECLARE_HOOK(bgp_hook_config_write_vrf, (struct vty *vty, struct vrf *vrf),
	     (vty, vrf));

#define BGP_MAX_HOSTNAME 64	/* Linux max, is larger than most other sys */
#define BGP_PEER_MAX_HASH_SIZE 16384

/* Default interval for IPv6 RAs when triggered by BGP unnumbered neighbor. */
#define BGP_UNNUM_DEFAULT_RA_INTERVAL 10

struct update_subgroup;
struct bpacket;
struct bgp_pbr_config;

/*
 * Allow the neighbor XXXX remote-as to take internal or external
 * AS_SPECIFIED is zero to auto-inherit original non-feature/enhancement
 * behavior
 * in the system.
 */
enum { AS_UNSPECIFIED = 0,
       AS_SPECIFIED,
       AS_INTERNAL,
       AS_EXTERNAL,
};

/* Zebra Gracaful Restart states */
enum zebra_gr_mode {
	ZEBRA_GR_DISABLE = 0,
	ZEBRA_GR_ENABLE
};

/* Typedef BGP specific types.  */
typedef uint16_t as16_t; /* we may still encounter 16 Bit asnums */
typedef uint16_t bgp_size_t;

enum bgp_af_index {
	BGP_AF_START,
	BGP_AF_IPV4_UNICAST = BGP_AF_START,
	BGP_AF_IPV4_MULTICAST,
	BGP_AF_IPV4_VPN,
	BGP_AF_IPV6_UNICAST,
	BGP_AF_IPV6_MULTICAST,
	BGP_AF_IPV6_VPN,
	BGP_AF_IPV4_ENCAP,
	BGP_AF_IPV6_ENCAP,
	BGP_AF_L2VPN_EVPN,
	BGP_AF_IPV4_LBL_UNICAST,
	BGP_AF_IPV6_LBL_UNICAST,
	BGP_AF_IPV4_FLOWSPEC,
	BGP_AF_IPV6_FLOWSPEC,
	BGP_AF_MAX
};

#define AF_FOREACH(af) for ((af) = BGP_AF_START; (af) < BGP_AF_MAX; (af)++)

#define FOREACH_SAFI(safi)                                            \
	for (safi = SAFI_UNICAST; safi < SAFI_MAX; safi++)

extern struct frr_pthread *bgp_pth_io;
extern struct frr_pthread *bgp_pth_ka;

/* BGP master for system wide configurations and variables.  */
struct bgp_master {
	/* BGP instance list.  */
	struct list *bgp;

	/* BGP thread master.  */
	struct event_loop *master;

	/* Listening sockets */
	struct list *listen_sockets;

	/* BGP port number.  */
	uint16_t port;

	/* Listener addresses */
	struct list *addresses;

	/* The Mac table */
	struct hash *self_mac_hash;

	/* BGP start time.  */
	time_t start_time;

	/* Various BGP global configuration.  */
	uint8_t options;

#define BGP_OPT_NO_FIB                   (1 << 0)
#define BGP_OPT_NO_LISTEN                (1 << 1)
#define BGP_OPT_NO_ZEBRA                 (1 << 2)
#define BGP_OPT_TRAPS_RFC4273            (1 << 3)
#define BGP_OPT_TRAPS_BGP4MIBV2          (1 << 4)

	uint64_t updgrp_idspace;
	uint64_t subgrp_idspace;

	/* timer to dampen route map changes */
	struct event *t_rmap_update; /* Handle route map updates */
	uint32_t rmap_update_timer;   /* Route map update timer */
#define RMAP_DEFAULT_UPDATE_TIMER 5 /* disabled by default */

	/* Id space for automatic RD derivation for an EVI/VRF */
	bitfield_t rd_idspace;

	/* dynamic mpls label allocation pool */
	struct labelpool labelpool;

	/* BGP-EVPN VRF ID. Defaults to default VRF (if any) */
	struct bgp* bgp_evpn;

	/* How big should we set the socket buffer size */
	uint32_t socket_buffer;

	/* Should we do wait for fib install globally? */
	bool wait_for_fib;

	/* EVPN multihoming */
	struct bgp_evpn_mh_info *mh_info;

	/* global update-delay timer values */
	uint16_t v_update_delay;
	uint16_t v_establish_wait;

	uint32_t flags;
#define BM_FLAG_GRACEFUL_SHUTDOWN        (1 << 0)
#define BM_FLAG_SEND_EXTRA_DATA_TO_ZEBRA (1 << 1)

	bool terminating;	/* global flag that sigint terminate seen */

	/* DSCP value for TCP sessions */
	uint8_t tcp_dscp;

#define BM_DEFAULT_Q_LIMIT 10000
	uint32_t inq_limit;
	uint32_t outq_limit;

	struct event *t_bgp_sync_label_manager;
	struct event *t_bgp_start_label_manager;

	bool v6_with_v4_nexthops;

	QOBJ_FIELDS;
};
DECLARE_QOBJ_TYPE(bgp_master);

/* BGP route-map structure.  */
struct bgp_rmap {
	char *name;
	struct route_map *map;
};

struct bgp_redist {
	unsigned short instance;

	/* BGP redistribute metric configuration. */
	uint8_t redist_metric_flag;
	uint32_t redist_metric;

	/* BGP redistribute route-map.  */
	struct bgp_rmap rmap;
};

enum vpn_policy_direction {
	BGP_VPN_POLICY_DIR_FROMVPN = 0,
	BGP_VPN_POLICY_DIR_TOVPN = 1,
	BGP_VPN_POLICY_DIR_MAX = 2
};

struct vpn_policy {
	struct bgp *bgp; /* parent */
	afi_t afi;
	struct ecommunity *rtlist[BGP_VPN_POLICY_DIR_MAX];
	struct ecommunity *import_redirect_rtlist;
	char *rmap_name[BGP_VPN_POLICY_DIR_MAX];
	struct route_map *rmap[BGP_VPN_POLICY_DIR_MAX];

	/* should be mpls_label_t? */
	uint32_t tovpn_label; /* may be MPLS_LABEL_NONE */
	uint32_t tovpn_zebra_vrf_label_last_sent;
	char *tovpn_rd_pretty;
	struct prefix_rd tovpn_rd;
	struct prefix tovpn_nexthop; /* unset => set to 0 */
	uint32_t flags;
#define BGP_VPN_POLICY_TOVPN_LABEL_AUTO        (1 << 0)
#define BGP_VPN_POLICY_TOVPN_RD_SET            (1 << 1)
#define BGP_VPN_POLICY_TOVPN_NEXTHOP_SET       (1 << 2)
#define BGP_VPN_POLICY_TOVPN_SID_AUTO          (1 << 3)
#define BGP_VPN_POLICY_TOVPN_LABEL_PER_NEXTHOP (1 << 4)
/* Manual label is registered with zebra label manager */
#define BGP_VPN_POLICY_TOVPN_LABEL_MANUAL_REG (1 << 5)

	/*
	 * If we are importing another vrf into us keep a list of
	 * vrf names that are being imported into us.
	 */
	struct list *import_vrf;

	/*
	 * if we are being exported to another vrf keep a list of
	 * vrf names that we are being exported to.
	 */
	struct list *export_vrf;

	/*
	 * Segment-Routing SRv6 Mode
	 */
	uint32_t tovpn_sid_index; /* unset => set to 0 */
	struct in6_addr *tovpn_sid;
	struct srv6_locator_chunk *tovpn_sid_locator;
	uint32_t tovpn_sid_transpose_label;
	struct in6_addr *tovpn_zebra_vrf_sid_last_sent;
};

/*
 * Type of 'struct bgp'.
 * - Default: The default instance
 * - VRF: A specific (non-default) VRF
 * - View: An instance used for route exchange
 * The "default" instance is treated separately to simplify the code. Note
 * that if deployed in a Multi-VRF environment, it may not exist.
 */
enum bgp_instance_type {
	BGP_INSTANCE_TYPE_DEFAULT,
	BGP_INSTANCE_TYPE_VRF,
	BGP_INSTANCE_TYPE_VIEW
};

#define BGP_SEND_EOR(bgp, afi, safi)                                           \
	(!CHECK_FLAG(bgp->flags, BGP_FLAG_GR_DISABLE_EOR)                      \
	 && ((bgp->gr_info[afi][safi].t_select_deferral == NULL)               \
	     || (bgp->gr_info[afi][safi].eor_required                          \
		 == bgp->gr_info[afi][safi].eor_received)))

/* BGP GR Global ds */

#define BGP_GLOBAL_GR_MODE 4
#define BGP_GLOBAL_GR_EVENT_CMD 4

/* Graceful restart selection deferral timer info */
struct graceful_restart_info {
	/* Count of EOR message expected */
	uint32_t eor_required;
	/* Count of EOR received */
	uint32_t eor_received;
	/* Deferral Timer */
	struct event *t_select_deferral;
	/* Routes Deferred */
	uint32_t gr_deferred;
	/* Best route select */
	struct event *t_route_select;
	/* AFI, SAFI enabled */
	bool af_enabled[AFI_MAX][SAFI_MAX];
	/* Route update completed */
	bool route_sync[AFI_MAX][SAFI_MAX];
};

enum global_mode {
	GLOBAL_HELPER = 0, /* This is the default mode */
	GLOBAL_GR,
	GLOBAL_DISABLE,
	GLOBAL_INVALID
};

enum global_gr_command {
	GLOBAL_GR_CMD = 0,
	NO_GLOBAL_GR_CMD,
	GLOBAL_DISABLE_CMD,
	NO_GLOBAL_DISABLE_CMD
};

#define BGP_GR_SUCCESS 0
#define BGP_GR_FAILURE 1

/* Handling of BGP link bandwidth (LB) on receiver - whether and how to
 * do weighted ECMP. Note: This applies after multipath computation.
 */
enum bgp_link_bw_handling {
	/* Do ECMP if some paths don't have LB - default */
	BGP_LINK_BW_ECMP,
	/* Completely ignore LB, just do regular ECMP */
	BGP_LINK_BW_IGNORE_BW,
	/* Skip paths without LB, do wECMP on others */
	BGP_LINK_BW_SKIP_MISSING,
	/* Do wECMP with default weight for paths not having LB */
	BGP_LINK_BW_DEFWT_4_MISSING
};

RB_HEAD(bgp_es_vrf_rb_head, bgp_evpn_es_vrf);
RB_PROTOTYPE(bgp_es_vrf_rb_head, bgp_evpn_es_vrf, rb_node, bgp_es_vrf_rb_cmp);

struct bgp_snmp_stats {
	/* SNMP variables for mplsL3Vpn*/
	time_t creation_time;
	time_t modify_time;
	bool active;
	uint32_t routes_added;
	uint32_t routes_deleted;
};

struct bgp_srv6_function {
	struct in6_addr sid;
	char locator_name[SRV6_LOCNAME_SIZE];
};

struct as_confed {
	as_t as;
	char *as_pretty;
};

struct bgp_mplsvpn_nh_label_bind_cache;
PREDECL_RBTREE_UNIQ(bgp_mplsvpn_nh_label_bind_cache);

/* BGP instance structure.  */
struct bgp {
	/* AS number of this BGP instance.  */
	as_t as;
	char *as_pretty;

	/* Name of this BGP instance.  */
	char *name;
	char *name_pretty;	/* printable "VRF|VIEW name|default" */

	/* Type of instance and VRF id. */
	enum bgp_instance_type inst_type;
	vrf_id_t vrf_id;

	/* Reference count to allow peer_delete to finish after bgp_delete */
	int lock;

	/* Self peer.  */
	struct peer *peer_self;

	/* BGP peer. */
	struct list *peer;
	struct hash *peerhash;

	/* BGP peer group.  */
	struct list *group;

	/* The maximum number of BGP dynamic neighbors that can be created */
	int dynamic_neighbors_limit;

	/* The current number of BGP dynamic neighbors */
	int dynamic_neighbors_count;

	struct hash *update_groups[BGP_AF_MAX];

	/*
	 * Global statistics for update groups.
	 */
	struct {
		uint32_t join_events;
		uint32_t prune_events;
		uint32_t merge_events;
		uint32_t split_events;
		uint32_t updgrp_switch_events;
		uint32_t peer_refreshes_combined;
		uint32_t adj_count;
		uint32_t merge_checks_triggered;

		uint32_t updgrps_created;
		uint32_t updgrps_deleted;
		uint32_t subgrps_created;
		uint32_t subgrps_deleted;
	} update_group_stats;

	struct bgp_snmp_stats *snmp_stats;

	/* BGP configuration.  */
	uint16_t config;
#define BGP_CONFIG_CLUSTER_ID             (1 << 0)
#define BGP_CONFIG_CONFEDERATION          (1 << 1)
#define BGP_CONFIG_ASNOTATION             (1 << 2)

	/* BGP router identifier.  */
	struct in_addr router_id;
	struct in_addr router_id_static;
	struct in_addr router_id_zebra;

	/* BGP route reflector cluster ID.  */
	struct in_addr cluster_id;

	/* BGP confederation information.  */
	as_t confed_id;
	char *confed_id_pretty;
	struct as_confed *confed_peers;
	int confed_peers_cnt;

	/* start-up timer on only once at the beginning */
	struct event *t_startup;

	uint32_t v_maxmed_onstartup; /* Duration of max-med on start-up */
#define BGP_MAXMED_ONSTARTUP_UNCONFIGURED  0 /* 0 means off, its the default */
	uint32_t maxmed_onstartup_value;     /* Max-med value when active on
						 start-up */

	/* non-null when max-med onstartup is on */
	struct event *t_maxmed_onstartup;
	uint8_t maxmed_onstartup_over; /* Flag to make it effective only once */

	bool v_maxmed_admin; /* true/false if max-med administrative is on/off
			      */
#define BGP_MAXMED_ADMIN_UNCONFIGURED false /* Off by default */
	uint32_t maxmed_admin_value; /* Max-med value when administrative in on
				      */
#define BGP_MAXMED_VALUE_DEFAULT  4294967294 /* Maximum by default */

	uint8_t maxmed_active; /* 1/0 if max-med is active or not */
	uint32_t maxmed_value; /* Max-med value when its active */

	/* BGP update delay on startup */
	struct event *t_update_delay;
	struct event *t_establish_wait;
	struct event *t_revalidate[AFI_MAX][SAFI_MAX];

	uint8_t update_delay_over;
	uint8_t main_zebra_update_hold;
	uint8_t main_peers_update_hold;
	uint16_t v_update_delay;
	uint16_t v_establish_wait;
	char update_delay_begin_time[64];
	char update_delay_end_time[64];
	char update_delay_zebra_resume_time[64];
	char update_delay_peers_resume_time[64];
	uint32_t established;
	uint32_t restarted_peers;
	uint32_t implicit_eors;
	uint32_t explicit_eors;
#define BGP_UPDATE_DELAY_DEF              0
#define BGP_UPDATE_DELAY_MIN              0
#define BGP_UPDATE_DELAY_MAX              3600

	/* Reference bandwidth for BGP link-bandwidth. Used when
	 * the LB value has to be computed based on some other
	 * factor (e.g., number of multipaths for the prefix)
	 * Value is in Mbps
	 */
	uint32_t lb_ref_bw;
#define BGP_LINK_BW_REF_BW                1

	/* BGP flags. */
	uint64_t flags;
#define BGP_FLAG_ALWAYS_COMPARE_MED (1ULL << 0)
#define BGP_FLAG_DETERMINISTIC_MED (1ULL << 1)
#define BGP_FLAG_MED_MISSING_AS_WORST (1ULL << 2)
#define BGP_FLAG_MED_CONFED (1ULL << 3)
#define BGP_FLAG_NO_CLIENT_TO_CLIENT (1ULL << 4)
#define BGP_FLAG_COMPARE_ROUTER_ID (1ULL << 5)
#define BGP_FLAG_ASPATH_IGNORE (1ULL << 6)
#define BGP_FLAG_IMPORT_CHECK (1ULL << 7)
#define BGP_FLAG_NO_FAST_EXT_FAILOVER (1ULL << 8)
#define BGP_FLAG_LOG_NEIGHBOR_CHANGES (1ULL << 9)

/* This flag is set when we have full BGP Graceful-Restart mode enable */
#define BGP_FLAG_GRACEFUL_RESTART (1ULL << 10)

#define BGP_FLAG_ASPATH_CONFED (1ULL << 11)
#define BGP_FLAG_ASPATH_MULTIPATH_RELAX (1ULL << 12)
#define BGP_FLAG_RR_ALLOW_OUTBOUND_POLICY (1ULL << 13)
#define BGP_FLAG_DISABLE_NH_CONNECTED_CHK (1ULL << 14)
#define BGP_FLAG_MULTIPATH_RELAX_AS_SET (1ULL << 15)
#define BGP_FLAG_FORCE_STATIC_PROCESS (1ULL << 16)
#define BGP_FLAG_SHOW_HOSTNAME (1ULL << 17)
#define BGP_FLAG_GR_PRESERVE_FWD (1ULL << 18)
#define BGP_FLAG_GRACEFUL_SHUTDOWN (1ULL << 19)
#define BGP_FLAG_DELETE_IN_PROGRESS (1ULL << 20)
#define BGP_FLAG_SELECT_DEFER_DISABLE (1ULL << 21)
#define BGP_FLAG_GR_DISABLE_EOR (1ULL << 22)
#define BGP_FLAG_EBGP_REQUIRES_POLICY (1ULL << 23)
#define BGP_FLAG_SHOW_NEXTHOP_HOSTNAME (1ULL << 24)

/* This flag is set if the instance is in administrative shutdown */
#define BGP_FLAG_SHUTDOWN (1ULL << 25)
#define BGP_FLAG_SUPPRESS_FIB_PENDING (1ULL << 26)
#define BGP_FLAG_SUPPRESS_DUPLICATES (1ULL << 27)
#define BGP_FLAG_PEERTYPE_MULTIPATH_RELAX (1ULL << 29)
/* Indicate Graceful Restart support for BGP NOTIFICATION messages */
#define BGP_FLAG_GRACEFUL_NOTIFICATION (1ULL << 30)
/* Send Hard Reset CEASE Notification for 'Administrative Reset' */
#define BGP_FLAG_HARD_ADMIN_RESET (1ULL << 31)
/* Evaluate the AIGP attribute during the best path selection process */
#define BGP_FLAG_COMPARE_AIGP (1ULL << 32)
/* For BGP-LU, force IPv4 local prefixes to use ipv4-explicit-null label */
#define BGP_FLAG_LU_IPV4_EXPLICIT_NULL (1ULL << 33)
/* For BGP-LU, force IPv6 local prefixes to use ipv6-explicit-null label */
#define BGP_FLAG_LU_IPV6_EXPLICIT_NULL (1ULL << 34)
#define BGP_FLAG_SOFT_VERSION_CAPABILITY (1ULL << 35)
#define BGP_FLAG_ENFORCE_FIRST_AS (1ULL << 36)

	/* BGP default address-families.
	 * New peers inherit enabled afi/safis from bgp instance.
	 */
	uint16_t default_af[AFI_MAX][SAFI_MAX];

	enum global_mode GLOBAL_GR_FSM[BGP_GLOBAL_GR_MODE]
				      [BGP_GLOBAL_GR_EVENT_CMD];
	enum global_mode global_gr_present_state;

	/* This variable stores the current Graceful Restart state of Zebra
	 * - ZEBRA_GR_ENABLE / ZEBRA_GR_DISABLE
	 */
	enum zebra_gr_mode present_zebra_gr_state;

	/* BGP Per AF flags */
	uint16_t af_flags[AFI_MAX][SAFI_MAX];
#define BGP_CONFIG_DAMPENING				(1 << 0)
/* l2vpn evpn flags - 1 << 0 is used for DAMPENNG */
#define BGP_L2VPN_EVPN_ADV_IPV4_UNICAST (1 << 1)
#define BGP_L2VPN_EVPN_ADV_IPV4_UNICAST_GW_IP (1 << 2)
#define BGP_L2VPN_EVPN_ADV_IPV6_UNICAST (1 << 3)
#define BGP_L2VPN_EVPN_ADV_IPV6_UNICAST_GW_IP (1 << 4)
#define BGP_L2VPN_EVPN_DEFAULT_ORIGINATE_IPV4 (1 << 5)
#define BGP_L2VPN_EVPN_DEFAULT_ORIGINATE_IPV6 (1 << 6)
/* import/export between address families */
#define BGP_CONFIG_VRF_TO_MPLSVPN_EXPORT (1 << 7)
#define BGP_CONFIG_MPLSVPN_TO_VRF_IMPORT (1 << 8)
/* vrf-route leaking flags */
#define BGP_CONFIG_VRF_TO_VRF_IMPORT (1 << 9)
#define BGP_CONFIG_VRF_TO_VRF_EXPORT (1 << 10)
/* vpnvx retain flag */
#define BGP_VPNVX_RETAIN_ROUTE_TARGET_ALL (1 << 11)

	/* BGP per AF peer count */
	uint32_t af_peer_count[AFI_MAX][SAFI_MAX];

	/* Tree for next-hop lookup cache. */
	struct bgp_nexthop_cache_head nexthop_cache_table[AFI_MAX];

	/* Tree for import-check */
	struct bgp_nexthop_cache_head import_check_table[AFI_MAX];

	struct bgp_table *connected_table[AFI_MAX];

	struct hash *address_hash;

	/* DB for all local tunnel-ips - used mainly for martian checks
	   Currently it only has all VxLan tunnel IPs*/
	struct hash *tip_hash;

	/* Static route configuration.  */
	struct bgp_table *route[AFI_MAX][SAFI_MAX];

	/* Aggregate address configuration.  */
	struct bgp_table *aggregate[AFI_MAX][SAFI_MAX];

	/* BGP routing information base.  */
	struct bgp_table *rib[AFI_MAX][SAFI_MAX];

	/* BGP table route-map.  */
	struct bgp_rmap table_map[AFI_MAX][SAFI_MAX];

	/* BGP redistribute configuration. */
	struct list *redist[AFI_MAX][ZEBRA_ROUTE_MAX];

	/* Allocate MPLS labels */
	uint8_t allocate_mpls_labels[AFI_MAX][SAFI_MAX];

	/* Tree for next-hop lookup cache. */
	struct bgp_label_per_nexthop_cache_head
		mpls_labels_per_nexthop[AFI_MAX];

	/* Tree for mplsvpn next-hop label bind cache */
	struct bgp_mplsvpn_nh_label_bind_cache_head mplsvpn_nh_label_bind;

	/* Allocate hash entries to store policy routing information
	 * The hash are used to host pbr rules somewhere.
	 * Actually, pbr will only be used by flowspec
	 * those hash elements will have relationship together as
	 * illustrated in below diagram:
	 *
	 *  pbr_action a <----- pbr_match i <--- pbr_match_entry 1..n
	 *              <----- pbr_match j <--- pbr_match_entry 1..m
	 *              <----- pbr_rule k
	 *
	 * - here in BGP structure, the list of match and actions will
	 * stand for the list of ipset sets, and table_ids in the kernel
	 * - the arrow above between pbr_match and pbr_action indicate
	 * that a backpointer permits match to find the action
	 * - the arrow betwen match_entry and match is a hash list
	 * contained in match, that lists the whole set of entries
	 */
	struct hash *pbr_match_hash;
	struct hash *pbr_rule_hash;
	struct hash *pbr_action_hash;

	/* timer to re-evaluate neighbor default-originate route-maps */
	struct event *t_rmap_def_originate_eval;
	uint16_t rmap_def_originate_eval_timer;
#define RMAP_DEFAULT_ORIGINATE_EVAL_TIMER 5

	/* BGP distance configuration.  */
	uint8_t distance_ebgp[AFI_MAX][SAFI_MAX];
	uint8_t distance_ibgp[AFI_MAX][SAFI_MAX];
	uint8_t distance_local[AFI_MAX][SAFI_MAX];

	/* BGP default local-preference.  */
	uint32_t default_local_pref;

	/* BGP default subgroup pkt queue max  */
	uint32_t default_subgroup_pkt_queue_max;

	/* BGP default timer.  */
	uint32_t default_holdtime;
	uint32_t default_keepalive;
	uint32_t default_connect_retry;
	uint32_t default_delayopen;

	/* BGP minimum holdtime.  */
	uint16_t default_min_holdtime;

	/* BGP graceful restart */
	uint32_t restart_time;
	uint32_t stalepath_time;
	uint32_t select_defer_time;
	struct graceful_restart_info gr_info[AFI_MAX][SAFI_MAX];
	uint32_t rib_stale_time;

	/* BGP Long-lived Graceful Restart */
	uint32_t llgr_stale_time;

#define BGP_ROUTE_SELECT_DELAY 1
#define BGP_MAX_BEST_ROUTE_SELECT 10000
	/* Maximum-paths configuration */
	struct bgp_maxpaths_cfg {
		uint16_t maxpaths_ebgp;
		uint16_t maxpaths_ibgp;
		bool same_clusterlen;
	} maxpaths[AFI_MAX][SAFI_MAX];

	_Atomic uint32_t wpkt_quanta; // max # packets to write per i/o cycle
	_Atomic uint32_t rpkt_quanta; // max # packets to read per i/o cycle

	/* Automatic coalesce adjust on/off */
	bool heuristic_coalesce;
	/* Actual coalesce time */
	uint32_t coalesce_time;

	/* Auto-shutdown new peers */
	bool autoshutdown;

	struct bgp_addpath_bgp_data tx_addpath;

#ifdef ENABLE_BGP_VNC
	struct rfapi_cfg *rfapi_cfg;
	struct rfapi *rfapi;
#endif

	/* EVPN related information */

	/* EVI hash table */
	struct hash *vnihash;

	/*
	 * VNI hash table based on SVI ifindex as its key.
	 * We use SVI ifindex as key to lookup a VNI table for gateway IP
	 * overlay index recursive lookup.
	 * For this purpose, a hashtable is added which optimizes this lookup.
	 */
	struct hash *vni_svi_hash;

	/* EVPN enable - advertise gateway macip routes */
	int advertise_gw_macip;

	/* EVPN enable - advertise local VNIs and their MACs etc. */
	int advertise_all_vni;

	/* draft-ietf-idr-deprecate-as-set-confed-set
	 * Reject aspaths with AS_SET and/or AS_CONFED_SET.
	 */
	bool reject_as_sets;

	struct bgp_evpn_info *evpn_info;

	/* EVPN - use RFC 8365 to auto-derive RT */
	int advertise_autort_rfc8365;

	/*
	 * Flooding mechanism for BUM packets for VxLAN-EVPN.
	 */
	enum vxlan_flood_control vxlan_flood_ctrl;

	/* Hash table of Import RTs to EVIs */
	struct hash *import_rt_hash;

	/* Hash table of VRF import RTs to VRFs */
	struct hash *vrf_import_rt_hash;

	/* L3-VNI corresponding to this vrf */
	vni_t l3vni;

	/* router-mac to be used in mac-ip routes for this vrf */
	struct ethaddr rmac;

	/* originator ip - to be used as NH for type-5 routes */
	struct in_addr originator_ip;

	/* SVI associated with the L3-VNI corresponding to this vrf */
	ifindex_t l3vni_svi_ifindex;

	/* RB tree of ES-VRFs */
	struct bgp_es_vrf_rb_head es_vrf_rb_tree;

	/* Hash table of EVPN nexthops maintained per-tenant-VRF */
	struct hash *evpn_nh_table;

	/*
	 * Flag resolve_overlay_index is used for recursive resolution
	 * procedures for EVPN type-5 route's gateway IP overlay index.
	 * When this flag is set, we build remote-ip-hash for
	 * all L2VNIs and resolve overlay index nexthops using this hash.
	 * Overlay index nexthops remain unresolved if this flag is not set.
	 */
	bool resolve_overlay_index;

	/* vrf flags */
	uint32_t vrf_flags;
#define BGP_VRF_AUTO                        (1 << 0)
#define BGP_VRF_IMPORT_RT_CFGD              (1 << 1)
#define BGP_VRF_EXPORT_RT_CFGD              (1 << 2)
#define BGP_VRF_IMPORT_AUTO_RT_CFGD         (1 << 3) /* retain auto when cfgd */
#define BGP_VRF_EXPORT_AUTO_RT_CFGD         (1 << 4) /* retain auto when cfgd */
#define BGP_VRF_RD_CFGD                     (1 << 5)
#define BGP_VRF_L3VNI_PREFIX_ROUTES_ONLY    (1 << 6)
/* per-VRF toVPN SID */
#define BGP_VRF_TOVPN_SID_AUTO              (1 << 7)

	/* unique ID for auto derivation of RD for this vrf */
	uint16_t vrf_rd_id;

	/* Automatically derived RD for this VRF */
	struct prefix_rd vrf_prd_auto;

	/* RD for this VRF */
	struct prefix_rd vrf_prd;
	char *vrf_prd_pretty;

	/* import rt list for the vrf instance */
	struct list *vrf_import_rtl;

	/* export rt list for the vrf instance */
	struct list *vrf_export_rtl;

	/* list of corresponding l2vnis (struct bgpevpn) */
	struct list *l2vnis;

	/* route map for advertise ipv4/ipv6 unicast (type-5 routes) */
	struct bgp_rmap adv_cmd_rmap[AFI_MAX][SAFI_MAX];

	struct vpn_policy vpn_policy[AFI_MAX];

	struct bgp_pbr_config *bgp_pbr_cfg;

	/* Count of peers in established state */
	uint32_t established_peers;

	/* Weighted ECMP related config. */
	enum bgp_link_bw_handling lb_handling;

	/* Process Queue for handling routes */
	struct work_queue *process_queue;

	bool fast_convergence;

	/* BGP Conditional advertisement */
	uint32_t condition_check_period;
	uint32_t condition_filter_count;
	struct event *t_condition_check;

	/* BGP VPN SRv6 backend */
	bool srv6_enabled;
	char srv6_locator_name[SRV6_LOCNAME_SIZE];
	struct list *srv6_locator_chunks;
	struct list *srv6_functions;
	uint32_t tovpn_sid_index; /* unset => set to 0 */
	struct in6_addr *tovpn_sid;
	struct srv6_locator_chunk *tovpn_sid_locator;
	uint32_t tovpn_sid_transpose_label;
	struct in6_addr *tovpn_zebra_vrf_sid_last_sent;

	/* TCP keepalive parameters for BGP connection */
	uint16_t tcp_keepalive_idle;
	uint16_t tcp_keepalive_intvl;
	uint16_t tcp_keepalive_probes;

	struct timeval ebgprequirespolicywarning;
#define FIFTEENMINUTE2USEC (int64_t)15 * 60 * 1000000

	bool allow_martian;

	enum asnotation_mode asnotation;

	QOBJ_FIELDS;
};
DECLARE_QOBJ_TYPE(bgp);

struct bgp_interface {
#define BGP_INTERFACE_MPLS_BGP_FORWARDING (1 << 0)
/* L3VPN multi domain switching */
#define BGP_INTERFACE_MPLS_L3VPN_SWITCHING (1 << 1)
	uint32_t flags;
};

DECLARE_HOOK(bgp_inst_delete, (struct bgp *bgp), (bgp));
DECLARE_HOOK(bgp_inst_config_write,
		(struct bgp *bgp, struct vty *vty),
		(bgp, vty));
DECLARE_HOOK(bgp_snmp_traps_config_write, (struct vty *vty), (vty));
DECLARE_HOOK(bgp_config_end, (struct bgp *bgp), (bgp));
DECLARE_HOOK(bgp_hook_vrf_update, (struct vrf *vrf, bool enabled),
	     (vrf, enabled));

/* Thread callback information */
struct afi_safi_info {
	afi_t afi;
	safi_t safi;
	struct bgp *bgp;
};

#define BGP_ROUTE_ADV_HOLD(bgp) (bgp->main_peers_update_hold)

#define IS_BGP_INST_KNOWN_TO_ZEBRA(bgp)                                        \
	(bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT                           \
	 || (bgp->inst_type == BGP_INSTANCE_TYPE_VRF                           \
	     && bgp->vrf_id != VRF_UNKNOWN))

#define BGP_SELECT_DEFER_DISABLE(bgp)                                          \
	(CHECK_FLAG(bgp->flags, BGP_FLAG_SELECT_DEFER_DISABLE))

#define BGP_SUPPRESS_FIB_ENABLED(bgp)                                          \
	(CHECK_FLAG(bgp->flags, BGP_FLAG_SUPPRESS_FIB_PENDING)                 \
	 || bm->wait_for_fib)

/* BGP peer-group support. */
struct peer_group {
	/* Name of the peer-group. */
	char *name;

	/* Pointer to BGP.  */
	struct bgp *bgp;

	/* Peer-group client list. */
	struct list *peer;

	/** Dynamic neighbor listening ranges */
	struct list *listen_range[AFI_MAX];

	/* Peer-group config */
	struct peer *conf;
};

/* BGP Notify message format. */
struct bgp_notify {
	uint8_t code;
	uint8_t subcode;
	bgp_size_t length;
	bool hard_reset;
	char *data;
	uint8_t *raw_data;
};

/* Next hop self address. */
struct bgp_nexthop {
	struct interface *ifp;
	struct in_addr v4;
	struct in6_addr v6_global;
	struct in6_addr v6_local;
};

/* BGP addpath values */
#define BGP_ADDPATH_RX     1
#define BGP_ADDPATH_TX     2
#define BGP_ADDPATH_ID_LEN 4

#define BGP_ADDPATH_TX_ID_FOR_DEFAULT_ORIGINATE 1

/* Route map direction */
#define RMAP_IN  0
#define RMAP_OUT 1
#define RMAP_MAX 2

#define BGP_DEFAULT_TTL         1
#define BGP_GTSM_HOPS_DISABLED  0
#define BGP_GTSM_HOPS_CONNECTED 1

/* Advertise map */
#define CONDITION_NON_EXIST	false
#define CONDITION_EXIST		true

enum update_type { UPDATE_TYPE_WITHDRAW, UPDATE_TYPE_ADVERTISE };

#include "filter.h"

/* BGP filter structure. */
struct bgp_filter {
	/* Distribute-list.  */
	struct {
		char *name;
		struct access_list *alist;
	} dlist[FILTER_MAX];

	/* Prefix-list.  */
	struct {
		char *name;
		struct prefix_list *plist;
	} plist[FILTER_MAX];

	/* Filter-list.  */
	struct {
		char *name;
		struct as_list *aslist;
	} aslist[FILTER_MAX];

	/* Route-map.  */
	struct {
		char *name;
		struct route_map *map;
	} map[RMAP_MAX];

	/* Unsuppress-map.  */
	struct {
		char *name;
		struct route_map *map;
	} usmap;

	/* Advertise-map */
	struct {
		char *aname;
		struct route_map *amap;

		bool condition;

		char *cname;
		struct route_map *cmap;

		enum update_type update_type;
	} advmap;
};

/* IBGP/EBGP identifier.  We also have a CONFED peer, which is to say,
   a peer who's AS is part of our Confederation.  */
enum bgp_peer_sort {
	BGP_PEER_UNSPECIFIED,
	BGP_PEER_IBGP,
	BGP_PEER_EBGP,
	BGP_PEER_INTERNAL,
	BGP_PEER_CONFED,
};

/* BGP peering sub-types
 * E.g.:
 * EBGP-OAD - https://datatracker.ietf.org/doc/html/draft-uttaro-idr-bgp-oad
 */
enum bgp_peer_sub_sort {
	BGP_PEER_EBGP_OAD = 1,
};

/* BGP message header and packet size.  */
#define BGP_MARKER_SIZE		                16
#define BGP_HEADER_SIZE		                19
#define BGP_STANDARD_MESSAGE_MAX_PACKET_SIZE 4096
#define BGP_EXTENDED_MESSAGE_MAX_PACKET_SIZE 65535
#define BGP_MAX_PACKET_SIZE BGP_EXTENDED_MESSAGE_MAX_PACKET_SIZE
#define BGP_MAX_PACKET_SIZE_OVERFLOW          1024

/*
 * Trigger delay for bgp_announce_route().
 */
#define BGP_ANNOUNCE_ROUTE_SHORT_DELAY_MS  100
#define BGP_ANNOUNCE_ROUTE_DELAY_MS        500

struct peer_af {
	/* back pointer to the peer */
	struct peer *peer;

	/* which subgroup the peer_af belongs to */
	struct update_subgroup *subgroup;

	/* for being part of an update subgroup's peer list */
	LIST_ENTRY(peer_af) subgrp_train;

	/* for being part of a packet's peer list */
	LIST_ENTRY(peer_af) pkt_train;

	struct bpacket *next_pkt_to_send;

	/*
	 * Trigger timer for bgp_announce_route().
	 */
	struct event *t_announce_route;

	afi_t afi;
	safi_t safi;
	int afid;
};
/* BGP GR per peer ds */

#define BGP_PEER_GR_MODE 5
#define BGP_PEER_GR_EVENT_CMD 6

enum peer_mode {
	PEER_HELPER = 0,
	PEER_GR,
	PEER_DISABLE,
	PEER_INVALID,
	PEER_GLOBAL_INHERIT /* This is the default mode */

};

enum peer_gr_command {
	PEER_GR_CMD = 0,
	NO_PEER_GR_CMD,
	PEER_DISABLE_CMD,
	NO_PEER_DISABLE_CMD,
	PEER_HELPER_CMD,
	NO_PEER_HELPER_CMD
};

typedef unsigned int (*bgp_peer_gr_action_ptr)(struct peer *, enum peer_mode,
					       enum peer_mode);

struct bgp_peer_gr {
	enum peer_mode next_state;
	bgp_peer_gr_action_ptr action_fun;
};

/*
 * BGP FSM event codes, per RFC 4271 ss. 8.1
 */
enum bgp_fsm_rfc_codes {
	BGP_FSM_ManualStart = 1,
	BGP_FSM_ManualStop = 2,
	BGP_FSM_AutomaticStart = 3,
	BGP_FSM_ManualStart_with_PassiveTcpEstablishment = 4,
	BGP_FSM_AutomaticStart_with_PassiveTcpEstablishment = 5,
	BGP_FSM_AutomaticStart_with_DampPeerOscillations = 6,
	BGP_FSM_AutomaticStart_with_DampPeerOscillations_and_PassiveTcpEstablishment =
		7,
	BGP_FSM_AutomaticStop = 8,
	BGP_FSM_ConnectRetryTimer_Expires = 9,
	BGP_FSM_HoldTimer_Expires = 10,
	BGP_FSM_KeepaliveTimer_Expires = 11,
	BGP_FSM_DelayOpenTimer_Expires = 12,
	BGP_FSM_IdleHoldTimer_Expires = 13,
	BGP_FSM_TcpConnection_Valid = 14,
	BGP_FSM_Tcp_CR_Invalid = 15,
	BGP_FSM_Tcp_CR_Acked = 16,
	BGP_FSM_TcpConnectionConfirmed = 17,
	BGP_FSM_TcpConnectionFails = 18,
	BGP_FSM_BGPOpen = 19,
	BGP_FSM_BGPOpen_with_DelayOpenTimer_running = 20,
	BGP_FSM_BGPHeaderErr = 21,
	BGP_FSM_BGPOpenMsgErr = 22,
	BGP_FSM_OpenCollisionDump = 23,
	BGP_FSM_NotifMsgVerErr = 24,
	BGP_FSM_NotifMsg = 25,
	BGP_FSM_KeepAliveMsg = 26,
	BGP_FSM_UpdateMsg = 27,
	BGP_FSM_UpdateMsgErr = 28
};

/*
 * BGP finite state machine events
 *
 * Note: these do not correspond to RFC-defined event codes. Those are
 * defined elsewhere.
 */
enum bgp_fsm_events {
	BGP_Start = 1,
	BGP_Stop,
	TCP_connection_open,
	TCP_connection_open_w_delay,
	TCP_connection_closed,
	TCP_connection_open_failed,
	TCP_fatal_error,
	ConnectRetry_timer_expired,
	Hold_Timer_expired,
	KeepAlive_timer_expired,
	DelayOpen_timer_expired,
	Receive_OPEN_message,
	Receive_KEEPALIVE_message,
	Receive_UPDATE_message,
	Receive_NOTIFICATION_message,
	Clearing_Completed,
	BGP_EVENTS_MAX,
};

/* BGP finite state machine status.  */
enum bgp_fsm_status {
	Idle = 1,
	Connect,
	Active,
	OpenSent,
	OpenConfirm,
	Established,
	Clearing,
	Deleted,
	BGP_STATUS_MAX,
};

#define PEER_HOSTNAME(peer) ((peer)->host ? (peer)->host : "(unknown peer)")

struct llgr_info {
	uint32_t stale_time;
	uint8_t flags;
};

struct peer_connection {
	struct peer *peer;

	/* Status of the peer connection. */
	enum bgp_fsm_status status;
	enum bgp_fsm_status ostatus;

	int fd;

	/* Thread flags */
	_Atomic uint32_t thread_flags;
#define PEER_THREAD_WRITES_ON (1U << 0)
#define PEER_THREAD_READS_ON  (1U << 1)

	/* Packet receive and send buffer. */
	pthread_mutex_t io_mtx;	  // guards ibuf, obuf
	struct stream_fifo *ibuf; // packets waiting to be processed
	struct stream_fifo *obuf; // packets waiting to be written

	struct ringbuf *ibuf_work; // WiP buffer used by bgp_read() only

	struct event *t_read;
	struct event *t_write;
	struct event *t_connect;
	struct event *t_delayopen;
	struct event *t_start;
	struct event *t_holdtime;

	struct event *t_connect_check_r;
	struct event *t_connect_check_w;

	struct event *t_gr_restart;
	struct event *t_gr_stale;

	struct event *t_generate_updgrp_packets;
	struct event *t_pmax_restart;

	struct event *t_routeadv;
	struct event *t_process_packet;
	struct event *t_process_packet_error;

	union sockunion su;
#define BGP_CONNECTION_SU_UNSPEC(connection)                                   \
	(connection->su.sa.sa_family == AF_UNSPEC)
};
extern struct peer_connection *bgp_peer_connection_new(struct peer *peer);
extern void bgp_peer_connection_free(struct peer_connection **connection);
extern void bgp_peer_connection_buffers_free(struct peer_connection *connection);

/* BGP neighbor structure. */
struct peer {
	/* BGP structure.  */
	struct bgp *bgp;

	/* reference count, primarily to allow bgp_process'ing of route_node's
	 * to be done after a struct peer is deleted.
	 *
	 * named 'lock' for hysterical reasons within Quagga.
	 */
	int lock;

	/* BGP peer group.  */
	struct peer_group *group;

	/* BGP peer_af structures, per configured AF on this peer */
	struct peer_af *peer_af_array[BGP_AF_MAX];

	/* Peer's remote AS number. */
	int as_type;
	as_t as;
	/* for vty as format */
	char *as_pretty;

	/* Peer's local AS number. */
	as_t local_as;

	enum bgp_peer_sort sort;
	enum bgp_peer_sub_sort sub_sort;

	/* Peer's Change local AS number. */
	as_t change_local_as;
	/* for vty as format */
	char *change_local_as_pretty;

	/* Remote router ID. */
	struct in_addr remote_id;

	/* Local router ID. */
	struct in_addr local_id;

	struct stream *curr; // the current packet being parsed

	/* the doppelganger peer structure, due to dual TCP conn setup */
	struct peer *doppelganger;

	/* FSM events, stored for debug purposes.
	 * Note: uchar used for reduced memory usage.
	 */
	enum bgp_fsm_events cur_event;
	enum bgp_fsm_events last_event;
	enum bgp_fsm_events last_major_event;

	/* Peer index, used for dumping TABLE_DUMP_V2 format */
	uint16_t table_dump_index;

	/* Peer information */

	/*
	 * We will have 2 `struct peer_connection` data structures
	 * connection is our attempt to talk to our peer.  incoming
	 * is the peer attempting to talk to us.  When it is
	 * time to consolidate between the two, we'll solidify
	 * into the connection variable being used.
	 */
	struct peer_connection *connection;

	int ttl;	     /* TTL of TCP connection to the peer. */
	int rtt;	     /* Estimated round-trip-time from TCP_INFO */
	int rtt_expected; /* Expected round-trip-time for a peer */
	uint8_t rtt_keepalive_rcv; /* Received count for RTT shutdown */
	uint8_t rtt_keepalive_conf; /* Configured count for RTT shutdown */
	int gtsm_hops;       /* minimum hopcount to peer */
	char *desc;	  /* Description of the peer. */
	unsigned short port; /* Destination port for peer */
	char *host;	  /* Printable address of the peer. */

	time_t uptime;       /* Last Up/Down time */
	time_t readtime;     /* Last read time */
	time_t resettime;    /* Last reset time */

	char *conf_if;	 /* neighbor interface config name. */
	struct interface *ifp; /* corresponding interface */
	char *ifname;	  /* bind interface name. */
	char *update_if;
	union sockunion *update_source;

	union sockunion *su_local;  /* Sockunion of local address.  */
	union sockunion *su_remote; /* Sockunion of remote address.  */
	int shared_network;	 /* Is this peer shared same network. */
	struct bgp_nexthop nexthop; /* Nexthop */

	/* Roles in bgp session */
	uint8_t local_role;
	uint8_t remote_role;
#define ROLE_PROVIDER                       0
#define ROLE_RS_SERVER                      1
#define ROLE_RS_CLIENT                      2
#define ROLE_CUSTOMER                       3
#define ROLE_PEER                           4
#define ROLE_UNDEFINED                    255

#define ROLE_NAME_MAX_LEN                  20

	/* Peer address family configuration. */
	uint8_t afc[AFI_MAX][SAFI_MAX];
	uint8_t afc_nego[AFI_MAX][SAFI_MAX];
	uint8_t afc_adv[AFI_MAX][SAFI_MAX];
	uint8_t afc_recv[AFI_MAX][SAFI_MAX];

	/* Capability flags (reset in bgp_stop) */
	uint64_t cap;
#define PEER_CAP_REFRESH_ADV (1ULL << 0) /* refresh advertised */
#define PEER_CAP_REFRESH_RCV (1ULL << 2) /* refresh rfc received */
#define PEER_CAP_DYNAMIC_ADV (1ULL << 3) /* dynamic advertised */
#define PEER_CAP_DYNAMIC_RCV (1ULL << 4) /* dynamic received */
#define PEER_CAP_RESTART_ADV (1ULL << 5) /* restart advertised */
#define PEER_CAP_RESTART_RCV (1ULL << 6) /* restart received */
#define PEER_CAP_AS4_ADV     (1ULL << 7) /* as4 advertised */
#define PEER_CAP_AS4_RCV     (1ULL << 8) /* as4 received */
/* sent graceful-restart restart (R) bit */
#define PEER_CAP_GRACEFUL_RESTART_R_BIT_ADV (1ULL << 9)
/* received graceful-restart restart (R) bit */
#define PEER_CAP_GRACEFUL_RESTART_R_BIT_RCV (1ULL << 10)
#define PEER_CAP_ADDPATH_ADV		    (1ULL << 11) /* addpath advertised */
#define PEER_CAP_ADDPATH_RCV		    (1ULL << 12) /* addpath received */
#define PEER_CAP_ENHE_ADV		    (1ULL << 13) /* Extended nexthop advertised */
#define PEER_CAP_ENHE_RCV		    (1ULL << 14) /* Extended nexthop received */
#define PEER_CAP_HOSTNAME_ADV		    (1ULL << 15) /* hostname advertised */
#define PEER_CAP_HOSTNAME_RCV		    (1ULL << 16) /* hostname received */
#define PEER_CAP_ENHANCED_RR_ADV	    (1ULL << 17) /* enhanced rr advertised */
#define PEER_CAP_ENHANCED_RR_RCV	    (1ULL << 18) /* enhanced rr received */
#define PEER_CAP_EXTENDED_MESSAGE_ADV	    (1ULL << 19)
#define PEER_CAP_EXTENDED_MESSAGE_RCV	    (1ULL << 20)
#define PEER_CAP_LLGR_ADV		    (1ULL << 21)
#define PEER_CAP_LLGR_RCV		    (1ULL << 22)
/* sent graceful-restart notification (N) bit */
#define PEER_CAP_GRACEFUL_RESTART_N_BIT_ADV (1ULL << 23)
/* received graceful-restart notification (N) bit */
#define PEER_CAP_GRACEFUL_RESTART_N_BIT_RCV (1ULL << 24)
#define PEER_CAP_ROLE_ADV		    (1ULL << 25) /* role advertised */
#define PEER_CAP_ROLE_RCV		    (1ULL << 26) /* role received */
#define PEER_CAP_SOFT_VERSION_ADV	    (1ULL << 27)
#define PEER_CAP_SOFT_VERSION_RCV	    (1ULL << 28)

	/* Capability flags (reset in bgp_stop) */
	uint32_t af_cap[AFI_MAX][SAFI_MAX];
#define PEER_CAP_ORF_PREFIX_SM_ADV          (1U << 0) /* send-mode advertised */
#define PEER_CAP_ORF_PREFIX_RM_ADV          (1U << 1) /* receive-mode advertised */
#define PEER_CAP_ORF_PREFIX_SM_RCV          (1U << 2) /* send-mode received */
#define PEER_CAP_ORF_PREFIX_RM_RCV          (1U << 3) /* receive-mode received */
#define PEER_CAP_RESTART_AF_RCV             (1U << 6) /* graceful restart afi/safi received */
#define PEER_CAP_RESTART_AF_PRESERVE_RCV    (1U << 7) /* graceful restart afi/safi F-bit received */
#define PEER_CAP_ADDPATH_AF_TX_ADV          (1U << 8) /* addpath tx advertised */
#define PEER_CAP_ADDPATH_AF_TX_RCV          (1U << 9) /* addpath tx received */
#define PEER_CAP_ADDPATH_AF_RX_ADV          (1U << 10) /* addpath rx advertised */
#define PEER_CAP_ADDPATH_AF_RX_RCV          (1U << 11) /* addpath rx received */
#define PEER_CAP_ENHE_AF_ADV                (1U << 12) /* Extended nexthopi afi/safi advertised */
#define PEER_CAP_ENHE_AF_RCV                (1U << 13) /* Extended nexthop afi/safi received */
#define PEER_CAP_ENHE_AF_NEGO               (1U << 14) /* Extended nexthop afi/safi negotiated */
#define PEER_CAP_LLGR_AF_ADV                (1U << 15)
#define PEER_CAP_LLGR_AF_RCV                (1U << 16)

	/* Global configuration flags. */
	/*
	 * Parallel array to flags that indicates whether each flag originates
	 * from a peer-group or if it is config that is specific to this
	 * individual peer. If a flag is set independent of the peer-group, the
	 * same bit should be set here. If this peer is a peer-group, this
	 * memory region should be all zeros.
	 *
	 * The assumption is that the default state for all flags is unset,
	 * so if a flag is unset, the corresponding override flag is unset too.
	 * However if a flag is set, the corresponding override flag is set.
	 */
	uint64_t flags_override;
	/*
	 * Parallel array to flags that indicates whether the default behavior
	 * of *flags_override* should be inverted. If a flag is unset and the
	 * corresponding invert flag is set, the corresponding override flag
	 * would be set. However if a flag is set and the corresponding invert
	 * flag is unset, the corresponding override flag would be unset.
	 *
	 * This can be used for attributes like *send-community*, which are
	 * implicitely enabled and have to be disabled explicitely, compared to
	 * 'normal' attributes like *next-hop-self* which are implicitely set.
	 *
	 * All operations dealing with flags should apply the following boolean
	 * logic to keep the internal flag system in a sane state:
	 *
	 * value=0 invert=0	Inherit flag if member, otherwise unset flag
	 * value=0 invert=1	Unset flag unconditionally
	 * value=1 invert=0	Set flag unconditionally
	 * value=1 invert=1	Inherit flag if member, otherwise set flag
	 *
	 * Contrary to the implementation of *flags_override*, the flag
	 * inversion state can be set either on the peer OR the peer *and* the
	 * peer-group. This was done on purpose, as the inversion state of a
	 * flag can be determined on either the peer or the peer-group.
	 *
	 * Example: Enabling the cisco configuration mode inverts all flags
	 * related to *send-community* unconditionally for both peer-groups and
	 * peers.
	 *
	 * This behavior is different for interface peers though, which enable
	 * the *extended-nexthop* flag by default, which regular peers do not.
	 * As the peer-group can contain both regular and interface peers, the
	 * flag inversion state must be set on the peer only.
	 *
	 * When a peer inherits the configuration from a peer-group and the
	 * inversion state of the flag differs between peer and peer-group, the
	 * newly set value must equal to the inverted state of the peer-group.
	 */
	uint64_t flags_invert;
	/*
	 * Effective array for storing the peer/peer-group flags. In case of a
	 * peer-group, the peer-specific overrides (see flags_override and
	 * flags_invert) must be respected.
	 * When changing the structure of flags/af_flags, do not forget to
	 * change flags_invert/flags_override too.
	 */
	uint64_t flags;
#define PEER_FLAG_PASSIVE                   (1ULL << 0) /* passive mode */
#define PEER_FLAG_SHUTDOWN                  (1ULL << 1) /* shutdown */
#define PEER_FLAG_DONT_CAPABILITY           (1ULL << 2) /* dont-capability */
#define PEER_FLAG_OVERRIDE_CAPABILITY       (1ULL << 3) /* override-capability */
#define PEER_FLAG_STRICT_CAP_MATCH          (1ULL << 4) /* strict-match */
#define PEER_FLAG_DYNAMIC_CAPABILITY        (1ULL << 5) /* dynamic capability */
#define PEER_FLAG_DISABLE_CONNECTED_CHECK   (1ULL << 6) /* disable-connected-check */
#define PEER_FLAG_LOCAL_AS_NO_PREPEND       (1ULL << 7) /* local-as no-prepend */
#define PEER_FLAG_LOCAL_AS_REPLACE_AS       (1ULL << 8) /* local-as no-prepend replace-as */
#define PEER_FLAG_DELETE                    (1ULL << 9) /* mark the peer for deleting */
#define PEER_FLAG_CONFIG_NODE               (1ULL << 10) /* the node to update configs on */
#define PEER_FLAG_LONESOUL                  (1ULL << 11)
#define PEER_FLAG_DYNAMIC_NEIGHBOR          (1ULL << 12) /* dynamic neighbor */
#define PEER_FLAG_CAPABILITY_ENHE           (1ULL << 13) /* Extended next-hop (rfc 5549)*/
#define PEER_FLAG_IFPEER_V6ONLY             (1ULL << 14) /* if-based peer is v6 only */
#define PEER_FLAG_IS_RFAPI_HD               (1ULL << 15) /* attached to rfapi HD */
#define PEER_FLAG_ENFORCE_FIRST_AS          (1ULL << 16) /* enforce-first-as */
#define PEER_FLAG_ROUTEADV                  (1ULL << 17) /* route advertise */
#define PEER_FLAG_TIMER                     (1ULL << 18) /* keepalive & holdtime */
#define PEER_FLAG_TIMER_CONNECT             (1ULL << 19) /* connect timer */
#define PEER_FLAG_PASSWORD                  (1ULL << 20) /* password */
#define PEER_FLAG_LOCAL_AS                  (1ULL << 21) /* local-as */
#define PEER_FLAG_UPDATE_SOURCE             (1ULL << 22) /* update-source */

	/* BGP-GR Peer related  flags */
#define PEER_FLAG_GRACEFUL_RESTART_HELPER   (1ULL << 23) /* Helper */
#define PEER_FLAG_GRACEFUL_RESTART          (1ULL << 24) /* Graceful Restart */
#define PEER_FLAG_GRACEFUL_RESTART_GLOBAL_INHERIT (1ULL << 25) /* Global-Inherit */
#define PEER_FLAG_RTT_SHUTDOWN (1ULL << 26) /* shutdown rtt */
#define PEER_FLAG_TIMER_DELAYOPEN (1ULL << 27) /* delayopen timer */
#define PEER_FLAG_TCP_MSS (1ULL << 28)	 /* tcp-mss */
/* Disable IEEE floating-point link bandwidth encoding in
 * extended communities.
 */
#define PEER_FLAG_DISABLE_LINK_BW_ENCODING_IEEE (1ULL << 29)
/* force the extended format for Optional Parameters in OPEN message */
#define PEER_FLAG_EXTENDED_OPT_PARAMS (1ULL << 30)

	/* BGP Open Policy flags.
	 * Enforce using roles on both sides:
	 * `local-role ROLE strict-mode` configured.
	 */
#define PEER_FLAG_ROLE_STRICT_MODE (1ULL << 31)
	/* `local-role` configured */
#define PEER_FLAG_ROLE (1ULL << 32)
#define PEER_FLAG_PORT (1ULL << 33)
#define PEER_FLAG_AIGP (1ULL << 34)
#define PEER_FLAG_GRACEFUL_SHUTDOWN (1ULL << 35)
#define PEER_FLAG_CAPABILITY_SOFT_VERSION (1ULL << 36)
#define PEER_FLAG_CAPABILITY_FQDN (1ULL << 37)  /* fqdn capability */

	/*
	 *GR-Disabled mode means unset PEER_FLAG_GRACEFUL_RESTART
	 *& PEER_FLAG_GRACEFUL_RESTART_HELPER
	 *and PEER_FLAG_GRACEFUL_RESTART_GLOBAL_INHERIT
	 */

	struct bgp_peer_gr PEER_GR_FSM[BGP_PEER_GR_MODE][BGP_PEER_GR_EVENT_CMD];
	enum peer_mode peer_gr_present_state;
	/* Non stop forwarding afi-safi count for BGP gr feature*/
	uint8_t nsf_af_count;

	uint8_t peer_gr_new_status_flag;
#define PEER_GRACEFUL_RESTART_NEW_STATE_HELPER   (1U << 0)
#define PEER_GRACEFUL_RESTART_NEW_STATE_RESTART  (1U << 1)
#define PEER_GRACEFUL_RESTART_NEW_STATE_INHERIT  (1U << 2)

	/* outgoing message sent in CEASE_ADMIN_SHUTDOWN notify */
	char *tx_shutdown_message;

	/* NSF mode (graceful restart) */
	uint8_t nsf[AFI_MAX][SAFI_MAX];
	/* EOR Send time */
	time_t eor_stime[AFI_MAX][SAFI_MAX];
	/* Last update packet sent time */
	time_t pkt_stime[AFI_MAX][SAFI_MAX];

	/* Peer Per AF flags */
	/*
	 * Please consult the comments for *flags_override*, *flags_invert* and
	 * *flags* to understand what these three arrays do. The address-family
	 * specific attributes are being treated the exact same way as global
	 * peer attributes.
	 */
	uint64_t af_flags_override[AFI_MAX][SAFI_MAX];
	uint64_t af_flags_invert[AFI_MAX][SAFI_MAX];
	uint64_t af_flags[AFI_MAX][SAFI_MAX];
#define PEER_FLAG_SEND_COMMUNITY (1ULL << 0)
#define PEER_FLAG_SEND_EXT_COMMUNITY (1ULL << 1)
#define PEER_FLAG_NEXTHOP_SELF (1ULL << 2)
#define PEER_FLAG_REFLECTOR_CLIENT (1ULL << 3)
#define PEER_FLAG_RSERVER_CLIENT (1ULL << 4)
#define PEER_FLAG_SOFT_RECONFIG (1ULL << 5)
#define PEER_FLAG_AS_PATH_UNCHANGED (1ULL << 6)
#define PEER_FLAG_NEXTHOP_UNCHANGED (1ULL << 7)
#define PEER_FLAG_MED_UNCHANGED (1ULL << 8)
#define PEER_FLAG_DEFAULT_ORIGINATE (1ULL << 9)
#define PEER_FLAG_REMOVE_PRIVATE_AS (1ULL << 10)
#define PEER_FLAG_ALLOWAS_IN (1ULL << 11)
#define PEER_FLAG_ORF_PREFIX_SM (1ULL << 12)
#define PEER_FLAG_ORF_PREFIX_RM (1ULL << 13)
#define PEER_FLAG_MAX_PREFIX (1ULL << 14)
#define PEER_FLAG_MAX_PREFIX_WARNING (1ULL << 15)
#define PEER_FLAG_NEXTHOP_LOCAL_UNCHANGED (1ULL << 16)
#define PEER_FLAG_FORCE_NEXTHOP_SELF (1ULL << 17)
#define PEER_FLAG_REMOVE_PRIVATE_AS_ALL (1ULL << 18)
#define PEER_FLAG_REMOVE_PRIVATE_AS_REPLACE (1ULL << 19)
#define PEER_FLAG_AS_OVERRIDE (1ULL << 20)
#define PEER_FLAG_REMOVE_PRIVATE_AS_ALL_REPLACE (1ULL << 21)
#define PEER_FLAG_WEIGHT (1ULL << 22)
#define PEER_FLAG_ALLOWAS_IN_ORIGIN (1ULL << 23)
#define PEER_FLAG_SEND_LARGE_COMMUNITY (1ULL << 24)
#define PEER_FLAG_MAX_PREFIX_OUT (1ULL << 25)
#define PEER_FLAG_MAX_PREFIX_FORCE (1ULL << 26)
#define PEER_FLAG_DISABLE_ADDPATH_RX (1ULL << 27)
#define PEER_FLAG_SOO (1ULL << 28)
#define PEER_FLAG_SEND_EXT_COMMUNITY_RPKI (1ULL << 29)
#define PEER_FLAG_ACCEPT_OWN (1ULL << 63)

	enum bgp_addpath_strat addpath_type[AFI_MAX][SAFI_MAX];

	/* MD5 password */
	char *password;

	/* default-originate route-map.  */
	struct {
		char *name;
		struct route_map *map;
	} default_rmap[AFI_MAX][SAFI_MAX];

	/* Peer status flags. */
	uint16_t sflags;
#define PEER_STATUS_ACCEPT_PEER	      (1U << 0) /* accept peer */
#define PEER_STATUS_PREFIX_OVERFLOW   (1U << 1) /* prefix-overflow */
#define PEER_STATUS_CAPABILITY_OPEN   (1U << 2) /* capability open send */
#define PEER_STATUS_HAVE_ACCEPT       (1U << 3) /* accept peer's parent */
#define PEER_STATUS_GROUP             (1U << 4) /* peer-group conf */
#define PEER_STATUS_NSF_MODE          (1U << 5) /* NSF aware peer */
#define PEER_STATUS_NSF_WAIT          (1U << 6) /* wait comeback peer */
/* received extended format encoding for OPEN message */
#define PEER_STATUS_EXT_OPT_PARAMS_LENGTH (1U << 7)

	/* Peer status af flags (reset in bgp_stop) */
	uint16_t af_sflags[AFI_MAX][SAFI_MAX];
#define PEER_STATUS_ORF_PREFIX_SEND   (1U << 0) /* prefix-list send peer */
#define PEER_STATUS_ORF_WAIT_REFRESH  (1U << 1) /* wait refresh received peer */
#define PEER_STATUS_PREFIX_THRESHOLD  (1U << 2) /* exceed prefix-threshold */
#define PEER_STATUS_PREFIX_LIMIT      (1U << 3) /* exceed prefix-limit */
#define PEER_STATUS_EOR_SEND          (1U << 4) /* end-of-rib send to peer */
#define PEER_STATUS_EOR_RECEIVED      (1U << 5) /* end-of-rib received from peer */
#define PEER_STATUS_ENHANCED_REFRESH (1U << 6) /* Enhanced Route Refresh */
#define PEER_STATUS_BORR_SEND (1U << 7) /* BoRR send to peer */
#define PEER_STATUS_BORR_RECEIVED (1U << 8) /* BoRR received from peer */
#define PEER_STATUS_EORR_SEND (1U << 9) /* EoRR send to peer */
#define PEER_STATUS_EORR_RECEIVED (1U << 10) /* EoRR received from peer */
/* LLGR aware peer */
#define PEER_STATUS_LLGR_WAIT (1U << 11)
#define PEER_STATUS_REFRESH_PENDING (1U << 12) /* refresh request from peer */
#define PEER_STATUS_RTT_SHUTDOWN (1U << 13) /* In shutdown state due to RTT */

	/* Configured timer values. */
	_Atomic uint32_t holdtime;
	_Atomic uint32_t keepalive;
	_Atomic uint32_t connect;
	_Atomic uint32_t routeadv;
	_Atomic uint32_t delayopen;

	/* Timer values. */
	_Atomic uint32_t v_start;
	_Atomic uint32_t v_connect;
	_Atomic uint32_t v_holdtime;
	_Atomic uint32_t v_keepalive;
	_Atomic uint32_t v_routeadv;
	_Atomic uint32_t v_delayopen;
	_Atomic uint32_t v_pmax_restart;
	_Atomic uint32_t v_gr_restart;

	/* Threads. */
	struct event *t_llgr_stale[AFI_MAX][SAFI_MAX];
	struct event *t_revalidate_all[AFI_MAX][SAFI_MAX];
	struct event *t_refresh_stalepath;

	/* Thread flags. */
	_Atomic uint32_t thread_flags;
#define PEER_THREAD_KEEPALIVES_ON (1U << 0)
#define PEER_THREAD_SUBGRP_ADV_DELAY (1U << 1)

	/* workqueues */
	struct work_queue *clear_node_queue;

#define PEER_TOTAL_RX(peer)                                                    \
	atomic_load_explicit(&peer->open_in, memory_order_relaxed)             \
		+ atomic_load_explicit(&peer->update_in, memory_order_relaxed) \
		+ atomic_load_explicit(&peer->notify_in, memory_order_relaxed) \
		+ atomic_load_explicit(&peer->refresh_in,                      \
				       memory_order_relaxed)                   \
		+ atomic_load_explicit(&peer->keepalive_in,                    \
				       memory_order_relaxed)                   \
		+ atomic_load_explicit(&peer->dynamic_cap_in,                  \
				       memory_order_relaxed)

#define PEER_TOTAL_TX(peer)                                                    \
	atomic_load_explicit(&peer->open_out, memory_order_relaxed)            \
		+ atomic_load_explicit(&peer->update_out,                      \
				       memory_order_relaxed)                   \
		+ atomic_load_explicit(&peer->notify_out,                      \
				       memory_order_relaxed)                   \
		+ atomic_load_explicit(&peer->refresh_out,                     \
				       memory_order_relaxed)                   \
		+ atomic_load_explicit(&peer->keepalive_out,                   \
				       memory_order_relaxed)                   \
		+ atomic_load_explicit(&peer->dynamic_cap_out,                 \
				       memory_order_relaxed)

	/* Statistics field */
	_Atomic uint32_t open_in;	 /* Open message input count */
	_Atomic uint32_t open_out;	/* Open message output count */
	_Atomic uint32_t update_in;       /* Update message input count */
	_Atomic uint32_t update_out;      /* Update message ouput count */
	_Atomic time_t update_time;       /* Update message received time. */
	_Atomic uint32_t keepalive_in;    /* Keepalive input count */
	_Atomic uint32_t keepalive_out;   /* Keepalive output count */
	_Atomic uint32_t notify_in;       /* Notify input count */
	_Atomic uint32_t notify_out;      /* Notify output count */
	_Atomic uint32_t refresh_in;      /* Route Refresh input count */
	_Atomic uint32_t refresh_out;     /* Route Refresh output count */
	_Atomic uint32_t dynamic_cap_in;  /* Dynamic Capability input count.  */
	_Atomic uint32_t dynamic_cap_out; /* Dynamic Capability output count. */

	uint32_t stat_pfx_filter;
	uint32_t stat_pfx_aspath_loop;
	uint32_t stat_pfx_originator_loop;
	uint32_t stat_pfx_cluster_loop;
	uint32_t stat_pfx_nh_invalid;
	uint32_t stat_pfx_dup_withdraw;
	uint32_t stat_upd_7606;  /* RFC7606: treat-as-withdraw */

	/* BGP state count */
	uint32_t established; /* Established */
	uint32_t dropped;     /* Dropped */

	/* Update delay related fields */
	uint8_t update_delay_over; /* When this is set, BGP is no more waiting
				     for EOR */

	time_t synctime;
	/* timestamp when the last UPDATE msg was written */
	_Atomic time_t last_write;
	/* timestamp when the last msg was written */
	_Atomic time_t last_update;

	/* only updated under io_mtx.
	 * last_sendq_warn is only for ratelimiting log warning messages.
	 */
	time_t last_sendq_ok, last_sendq_warn;

	/* Notify data. */
	struct bgp_notify notify;

	/* Filter structure. */
	struct bgp_filter filter[AFI_MAX][SAFI_MAX];

	/*
	 * Parallel array to filter that indicates whether each filter
	 * originates from a peer-group or if it is config that is specific to
	 * this individual peer. If a filter is set independent of the
	 * peer-group the appropriate bit should be set here. If this peer is a
	 * peer-group, this memory region should be all zeros. The assumption
	 * is that the default state for all flags is unset. Due to filters
	 * having a direction (e.g. in/out/...), this array has a third
	 * dimension for storing the overrides independently per direction.
	 *
	 * Notes:
	 * - if a filter for an individual peer is unset, the corresponding
	 *   override flag is unset and the peer is considered to be back in
	 *   sync with the peer-group.
	 * - This does *not* contain the filter values, rather it contains
	 *   whether the filter in filter (struct bgp_filter) is peer-specific.
	 */
	uint8_t filter_override[AFI_MAX][SAFI_MAX][FILTER_MAX];
#define PEER_FT_DISTRIBUTE_LIST       (1U << 0) /* distribute-list */
#define PEER_FT_FILTER_LIST           (1U << 1) /* filter-list */
#define PEER_FT_PREFIX_LIST           (1U << 2) /* prefix-list */
#define PEER_FT_ROUTE_MAP             (1U << 3) /* route-map */
#define PEER_FT_UNSUPPRESS_MAP        (1U << 4) /* unsuppress-map */
#define PEER_FT_ADVERTISE_MAP         (1U << 5) /* advertise-map */

	/* ORF Prefix-list */
	struct prefix_list *orf_plist[AFI_MAX][SAFI_MAX];

	/* Text description of last attribute rcvd */
	char rcvd_attr_str[BUFSIZ];

	/* Track if we printed the attribute in debugs */
	int rcvd_attr_printed;

	/* Accepted prefix count */
	uint32_t pcount[AFI_MAX][SAFI_MAX];

	/* Max prefix count. */
	uint32_t pmax[AFI_MAX][SAFI_MAX];
	uint8_t pmax_threshold[AFI_MAX][SAFI_MAX];
	uint16_t pmax_restart[AFI_MAX][SAFI_MAX];
#define MAXIMUM_PREFIX_THRESHOLD_DEFAULT 75

	/* Send prefix count. */
	uint32_t pmax_out[AFI_MAX][SAFI_MAX];

	/* allowas-in. */
	char allowas_in[AFI_MAX][SAFI_MAX];

	/* soo */
	struct ecommunity *soo[AFI_MAX][SAFI_MAX];

	/* weight */
	unsigned long weight[AFI_MAX][SAFI_MAX];

	/* peer reset cause */
	uint8_t last_reset;
#define PEER_DOWN_RID_CHANGE             1U /* bgp router-id command */
#define PEER_DOWN_REMOTE_AS_CHANGE       2U /* neighbor remote-as command */
#define PEER_DOWN_LOCAL_AS_CHANGE        3U /* neighbor local-as command */
#define PEER_DOWN_CLID_CHANGE            4U /* bgp cluster-id command */
#define PEER_DOWN_CONFED_ID_CHANGE       5U /* bgp confederation id command */
#define PEER_DOWN_CONFED_PEER_CHANGE     6U /* bgp confederation peer command */
#define PEER_DOWN_RR_CLIENT_CHANGE       7U /* neighbor rr-client command */
#define PEER_DOWN_RS_CLIENT_CHANGE       8U /* neighbor rs-client command */
#define PEER_DOWN_UPDATE_SOURCE_CHANGE   9U /* neighbor update-source command */
#define PEER_DOWN_AF_ACTIVATE           10U /* neighbor activate command */
#define PEER_DOWN_USER_SHUTDOWN         11U /* neighbor shutdown command */
#define PEER_DOWN_USER_RESET            12U /* clear ip bgp command */
#define PEER_DOWN_NOTIFY_RECEIVED       13U /* notification received */
#define PEER_DOWN_NOTIFY_SEND           14U /* notification send */
#define PEER_DOWN_CLOSE_SESSION         15U /* tcp session close */
#define PEER_DOWN_NEIGHBOR_DELETE       16U /* neghbor delete */
#define PEER_DOWN_RMAP_BIND             17U /* neghbor peer-group command */
#define PEER_DOWN_RMAP_UNBIND           18U /* no neighbor peer-group command */
#define PEER_DOWN_CAPABILITY_CHANGE     19U /* neighbor capability command */
#define PEER_DOWN_PASSIVE_CHANGE        20U /* neighbor passive command */
#define PEER_DOWN_MULTIHOP_CHANGE       21U /* neighbor multihop command */
#define PEER_DOWN_NSF_CLOSE_SESSION     22U /* NSF tcp session close */
#define PEER_DOWN_V6ONLY_CHANGE         23U /* if-based peering v6only toggled */
#define PEER_DOWN_BFD_DOWN              24U /* BFD down */
#define PEER_DOWN_IF_DOWN               25U /* Interface down */
#define PEER_DOWN_NBR_ADDR_DEL          26U /* Peer address lost */
#define PEER_DOWN_WAITING_NHT           27U /* Waiting for NHT to resolve */
#define PEER_DOWN_NBR_ADDR              28U /* Waiting for peer IPv6 IP Addr */
#define PEER_DOWN_VRF_UNINIT            29U /* Associated VRF is not init yet */
#define PEER_DOWN_NOAFI_ACTIVATED       30U /* No AFI/SAFI activated for peer */
#define PEER_DOWN_AS_SETS_REJECT        31U /* Reject routes with AS_SET */
#define PEER_DOWN_WAITING_OPEN          32U /* Waiting for open to succeed */
#define PEER_DOWN_PFX_COUNT             33U /* Reached received prefix count */
#define PEER_DOWN_SOCKET_ERROR          34U /* Some socket error happened */
#define PEER_DOWN_RTT_SHUTDOWN          35U /* Automatically shutdown due to RTT */
#define PEER_DOWN_SUPPRESS_FIB_PENDING	 36U /* Suppress fib pending changed */
	/*
	 * Remember to update peer_down_str in bgp_fsm.c when you add
	 * a new value to the last_reset reason
	 */

	struct stream *last_reset_cause;

	/* The kind of route-map Flags.*/
	uint16_t rmap_type;
#define PEER_RMAP_TYPE_IN             (1U << 0) /* neighbor route-map in */
#define PEER_RMAP_TYPE_OUT            (1U << 1) /* neighbor route-map out */
#define PEER_RMAP_TYPE_NETWORK        (1U << 2) /* network route-map */
#define PEER_RMAP_TYPE_REDISTRIBUTE   (1U << 3) /* redistribute route-map */
#define PEER_RMAP_TYPE_DEFAULT        (1U << 4) /* default-originate route-map */
#define PEER_RMAP_TYPE_NOSET          (1U << 5) /* not allow to set commands */
#define PEER_RMAP_TYPE_IMPORT         (1U << 6) /* neighbor route-map import */
#define PEER_RMAP_TYPE_EXPORT         (1U << 7) /* neighbor route-map export */
#define PEER_RMAP_TYPE_AGGREGATE      (1U << 8) /* aggregate-address route-map */

	/** Peer overwrite configuration. */
	struct bfd_session_config {
		/**
		 * Manual configuration bit.
		 *
		 * This flag only makes sense for real peers (and not groups),
		 * it keeps track if the user explicitly configured BFD for a
		 * peer.
		 */
		bool manual;
		/** Control Plane Independent. */
		bool cbit;
		/** Detection multiplier. */
		uint8_t detection_multiplier;
		/** Minimum required RX interval. */
		uint32_t min_rx;
		/** Minimum required TX interval. */
		uint32_t min_tx;
		/** Profile name. */
		char profile[BFD_PROFILE_NAME_LEN];
		/** Peer BFD session */
		struct bfd_session_params *session;
	} * bfd_config;

	/* hostname and domainname advertised by host */
	char *hostname;
	char *domainname;

	/* Sender side AS path loop detection. */
	bool as_path_loop_detection;

	/* Extended Message Support */
	uint16_t max_packet_size;

	/* Conditional advertisement */
	bool advmap_config_change[AFI_MAX][SAFI_MAX];
	bool advmap_table_change;

	/* set TCP max segment size */
	uint32_t tcp_mss;

	/* Long-lived Graceful Restart */
	struct llgr_info llgr[AFI_MAX][SAFI_MAX];

	bool shut_during_cfg;

#define BGP_ATTR_MAX 255
	/* Path attributes discard */
	bool discard_attrs[BGP_ATTR_MAX + 1];

	/* Path attributes treat-as-withdraw */
	bool withdraw_attrs[BGP_ATTR_MAX + 1];

	/* BGP Software Version Capability */
#define BGP_MAX_SOFT_VERSION 64
	char *soft_version;

	/* Add-Path Best selected paths number to advertise */
	uint8_t addpath_best_selected[AFI_MAX][SAFI_MAX];

	QOBJ_FIELDS;
};
DECLARE_QOBJ_TYPE(peer);

/* Inherit peer attribute from peer-group. */
#define PEER_ATTR_INHERIT(peer, group, attr)                                   \
	((peer)->attr = (group)->conf->attr)
#define PEER_STR_ATTR_INHERIT(peer, group, attr, mt)                           \
	do {                                                                   \
		XFREE(mt, (peer)->attr);                                       \
		if ((group)->conf->attr)                                       \
			(peer)->attr = XSTRDUP(mt, (group)->conf->attr);       \
		else                                                           \
			(peer)->attr = NULL;                                   \
	} while (0)
#define PEER_SU_ATTR_INHERIT(peer, group, attr)                                \
	do {                                                                   \
		if ((peer)->attr)                                              \
			sockunion_free((peer)->attr);                          \
		if ((group)->conf->attr)                                       \
			(peer)->attr = sockunion_dup((group)->conf->attr);     \
		else                                                           \
			(peer)->attr = NULL;                                   \
	} while (0)

/* Check if suppress start/restart of sessions to peer. */
#define BGP_PEER_START_SUPPRESSED(P)                                           \
	(CHECK_FLAG((P)->flags, PEER_FLAG_SHUTDOWN) ||                         \
	 CHECK_FLAG((P)->sflags, PEER_STATUS_PREFIX_OVERFLOW) ||               \
	 CHECK_FLAG((P)->bgp->flags, BGP_FLAG_SHUTDOWN) ||                     \
	 (P)->shut_during_cfg)

#define PEER_ROUTE_ADV_DELAY(peer)					       \
	(CHECK_FLAG(peer->thread_flags, PEER_THREAD_SUBGRP_ADV_DELAY))

#define PEER_PASSWORD_MINLEN	(1)
#define PEER_PASSWORD_MAXLEN	(80)

/* This structure's member directly points incoming packet data
   stream. */
struct bgp_nlri {
	/* AFI.  */
	uint16_t afi; /* iana_afi_t */

	/* SAFI.  */
	uint8_t safi; /* iana_safi_t */

	/* Length of whole NLRI.  */
	bgp_size_t length;

	/* Pointer to NLRI byte stream.  */
	uint8_t *nlri;
};

/* BGP versions.  */
#define BGP_VERSION_4		                 4

/* Default BGP port number.  */
#define BGP_PORT_DEFAULT                       179

/* Extended BGP Administrative Shutdown Communication */
#define BGP_ADMIN_SHUTDOWN_MSG_LEN 255

/* BGP minimum message size.  */
#define BGP_MSG_OPEN_MIN_SIZE                   (BGP_HEADER_SIZE + 10)
#define BGP_MSG_UPDATE_MIN_SIZE                 (BGP_HEADER_SIZE + 4)
#define BGP_MSG_NOTIFY_MIN_SIZE                 (BGP_HEADER_SIZE + 2)
#define BGP_MSG_KEEPALIVE_MIN_SIZE              (BGP_HEADER_SIZE + 0)
#define BGP_MSG_ROUTE_REFRESH_MIN_SIZE          (BGP_HEADER_SIZE + 4)
#define BGP_MSG_CAPABILITY_MIN_SIZE             (BGP_HEADER_SIZE + 3)

/* BGP message types.  */
#define	BGP_MSG_OPEN		                 1
#define	BGP_MSG_UPDATE		                 2
#define	BGP_MSG_NOTIFY		                 3
#define	BGP_MSG_KEEPALIVE	                 4
#define BGP_MSG_ROUTE_REFRESH_NEW                5
#define BGP_MSG_CAPABILITY                       6
#define BGP_MSG_ROUTE_REFRESH_OLD              128

/* BGP open optional parameter.  */
#define BGP_OPEN_OPT_CAP                         2

/* BGP4 attribute type codes.  */
#define BGP_ATTR_ORIGIN                          1
#define BGP_ATTR_AS_PATH                         2
#define BGP_ATTR_NEXT_HOP                        3
#define BGP_ATTR_MULTI_EXIT_DISC                 4
#define BGP_ATTR_LOCAL_PREF                      5
#define BGP_ATTR_ATOMIC_AGGREGATE                6
#define BGP_ATTR_AGGREGATOR                      7
#define BGP_ATTR_COMMUNITIES                     8
#define BGP_ATTR_ORIGINATOR_ID                   9
#define BGP_ATTR_CLUSTER_LIST                   10
#define BGP_ATTR_MP_REACH_NLRI                  14
#define BGP_ATTR_MP_UNREACH_NLRI                15
#define BGP_ATTR_EXT_COMMUNITIES                16
#define BGP_ATTR_AS4_PATH                       17
#define BGP_ATTR_AS4_AGGREGATOR                 18
#define BGP_ATTR_PMSI_TUNNEL                    22
#define BGP_ATTR_ENCAP                          23
#define BGP_ATTR_IPV6_EXT_COMMUNITIES           25
#define BGP_ATTR_AIGP                           26
#define BGP_ATTR_LARGE_COMMUNITIES              32
#define BGP_ATTR_OTC                            35
#define BGP_ATTR_PREFIX_SID                     40
#define BGP_ATTR_SRTE_COLOR                     51
#ifdef ENABLE_BGP_VNC_ATTR
#define BGP_ATTR_VNC                           255
#endif

/* BGP update origin.  */
#define BGP_ORIGIN_IGP                           0
#define BGP_ORIGIN_EGP                           1
#define BGP_ORIGIN_INCOMPLETE                    2
#define BGP_ORIGIN_UNSPECIFIED                 255

/* BGP notify message codes.  */
#define BGP_NOTIFY_HEADER_ERR                    1
#define BGP_NOTIFY_OPEN_ERR                      2
#define BGP_NOTIFY_UPDATE_ERR                    3
#define BGP_NOTIFY_HOLD_ERR                      4
#define BGP_NOTIFY_FSM_ERR                       5
#define BGP_NOTIFY_CEASE                         6
#define BGP_NOTIFY_ROUTE_REFRESH_ERR             7

/* Subcodes for BGP Finite State Machine Error */
#define BGP_NOTIFY_FSM_ERR_SUBCODE_UNSPECIFIC  0
#define BGP_NOTIFY_FSM_ERR_SUBCODE_OPENSENT    1
#define BGP_NOTIFY_FSM_ERR_SUBCODE_OPENCONFIRM 2
#define BGP_NOTIFY_FSM_ERR_SUBCODE_ESTABLISHED 3

#define BGP_NOTIFY_SUBCODE_UNSPECIFIC            0

/* BGP_NOTIFY_HEADER_ERR sub codes.  */
#define BGP_NOTIFY_HEADER_NOT_SYNC               1
#define BGP_NOTIFY_HEADER_BAD_MESLEN             2
#define BGP_NOTIFY_HEADER_BAD_MESTYPE            3

/* BGP_NOTIFY_OPEN_ERR sub codes.  */
#define BGP_NOTIFY_OPEN_MALFORMED_ATTR           0
#define BGP_NOTIFY_OPEN_UNSUP_VERSION            1
#define BGP_NOTIFY_OPEN_BAD_PEER_AS              2
#define BGP_NOTIFY_OPEN_BAD_BGP_IDENT            3
#define BGP_NOTIFY_OPEN_UNSUP_PARAM              4
#define BGP_NOTIFY_OPEN_UNACEP_HOLDTIME          6
#define BGP_NOTIFY_OPEN_UNSUP_CAPBL              7
#define BGP_NOTIFY_OPEN_ROLE_MISMATCH           11

/* BGP_NOTIFY_UPDATE_ERR sub codes.  */
#define BGP_NOTIFY_UPDATE_MAL_ATTR               1
#define BGP_NOTIFY_UPDATE_UNREC_ATTR             2
#define BGP_NOTIFY_UPDATE_MISS_ATTR              3
#define BGP_NOTIFY_UPDATE_ATTR_FLAG_ERR          4
#define BGP_NOTIFY_UPDATE_ATTR_LENG_ERR          5
#define BGP_NOTIFY_UPDATE_INVAL_ORIGIN           6
#define BGP_NOTIFY_UPDATE_INVAL_NEXT_HOP         8
#define BGP_NOTIFY_UPDATE_OPT_ATTR_ERR           9
#define BGP_NOTIFY_UPDATE_INVAL_NETWORK         10
#define BGP_NOTIFY_UPDATE_MAL_AS_PATH           11

/* BGP_NOTIFY_CEASE sub codes (RFC 4486).  */
#define BGP_NOTIFY_CEASE_MAX_PREFIX              1
#define BGP_NOTIFY_CEASE_ADMIN_SHUTDOWN          2
#define BGP_NOTIFY_CEASE_PEER_UNCONFIG           3
#define BGP_NOTIFY_CEASE_ADMIN_RESET             4
#define BGP_NOTIFY_CEASE_CONNECT_REJECT          5
#define BGP_NOTIFY_CEASE_CONFIG_CHANGE           6
#define BGP_NOTIFY_CEASE_COLLISION_RESOLUTION    7
#define BGP_NOTIFY_CEASE_OUT_OF_RESOURCE         8
#define BGP_NOTIFY_CEASE_HARD_RESET 9
#define BGP_NOTIFY_CEASE_BFD_DOWN 10

/* BGP_NOTIFY_ROUTE_REFRESH_ERR sub codes (RFC 7313). */
#define BGP_NOTIFY_ROUTE_REFRESH_INVALID_MSG_LEN 1

/* BGP route refresh optional subtypes. */
#define BGP_ROUTE_REFRESH_NORMAL 0
#define BGP_ROUTE_REFRESH_BORR 1
#define BGP_ROUTE_REFRESH_EORR 2

/* BGP timers default value.  */
#define BGP_INIT_START_TIMER                     1
/* The following 3 are RFC defaults that are overridden in bgp_vty.c with
 * version-/profile-specific values.  The values here do not matter, they only
 * exist to provide a clear layering separation between core and CLI.
 */
#define BGP_DEFAULT_HOLDTIME                   180
#define BGP_DEFAULT_KEEPALIVE                   60
#define BGP_DEFAULT_CONNECT_RETRY              120

#define BGP_DEFAULT_EBGP_ROUTEADV                0
#define BGP_DEFAULT_IBGP_ROUTEADV                0

/* BGP RFC 4271 DelayOpenTime default value */
#define BGP_DEFAULT_DELAYOPEN 120

/* BGP default local preference.  */
#define BGP_DEFAULT_LOCAL_PREF                 100

/* BGP local-preference to send when 'bgp graceful-shutdown'
 * is configured */
#define BGP_GSHUT_LOCAL_PREF                     0

/* BGP default subgroup packet queue max .  */
#define BGP_DEFAULT_SUBGROUP_PKT_QUEUE_MAX      40

/* BGP graceful restart  */
#define BGP_DEFAULT_RESTART_TIME               120
#define BGP_DEFAULT_STALEPATH_TIME             360
#define BGP_DEFAULT_SELECT_DEFERRAL_TIME       360
#define BGP_DEFAULT_RIB_STALE_TIME             500
#define BGP_DEFAULT_UPDATE_ADVERTISEMENT_TIME  1

/* BGP Long-lived Graceful Restart */
#define BGP_DEFAULT_LLGR_STALE_TIME 0

/* BGP uptime string length.  */
#define BGP_UPTIME_LEN 25

/* Default configuration settings for bgpd.  */
#define BGP_DEFAULT_CONFIG             "bgpd.conf"

/* BGP Dynamic Neighbors feature */
#define BGP_DYNAMIC_NEIGHBORS_LIMIT_DEFAULT    100
#define BGP_DYNAMIC_NEIGHBORS_LIMIT_MIN          1
#define BGP_DYNAMIC_NEIGHBORS_LIMIT_MAX      65535

/* BGP AIGP */
#define BGP_AIGP_TLV_RESERVED 0 /* AIGP Reserved */
#define BGP_AIGP_TLV_METRIC 1   /* AIGP Metric */
#define BGP_AIGP_TLV_METRIC_LEN 11
#define BGP_AIGP_TLV_METRIC_MAX 0xffffffffffffffffULL
#define BGP_AIGP_TLV_METRIC_DESC "Accumulated IGP Metric"

/* Flag for peer_clear_soft().  */
enum bgp_clear_type {
	BGP_CLEAR_SOFT_NONE,
	BGP_CLEAR_SOFT_OUT,
	BGP_CLEAR_SOFT_IN,
	BGP_CLEAR_SOFT_BOTH,
	BGP_CLEAR_SOFT_IN_ORF_PREFIX,
	BGP_CLEAR_MESSAGE_STATS,
	BGP_CLEAR_CAPABILITIES,
};

/* Macros. */
#define BGP_INPUT(P)         ((P)->curr)
#define BGP_INPUT_PNT(P)     (stream_pnt(BGP_INPUT(P)))
#define BGP_IS_VALID_STATE_FOR_NOTIF(S)                                        \
	(((S) == OpenSent) || ((S) == OpenConfirm) || ((S) == Established))

/* BGP error codes.  */
enum bgp_create_error_code {
	BGP_SUCCESS = 0,
	BGP_CREATED = 1,
	BGP_ERR_INVALID_VALUE = -1,
	BGP_ERR_INVALID_FLAG = -2,
	BGP_ERR_INVALID_AS = -3,
	BGP_ERR_PEER_GROUP_MEMBER = -4,
	BGP_ERR_PEER_GROUP_NO_REMOTE_AS = -5,
	BGP_ERR_PEER_GROUP_CANT_CHANGE = -6,
	BGP_ERR_PEER_GROUP_MISMATCH = -7,
	BGP_ERR_PEER_GROUP_PEER_TYPE_DIFFERENT = -8,
	BGP_ERR_AS_MISMATCH = -9,
	BGP_ERR_PEER_FLAG_CONFLICT = -10,
	BGP_ERR_PEER_GROUP_SHUTDOWN = -11,
	BGP_ERR_PEER_FILTER_CONFLICT = -12,
	BGP_ERR_NOT_INTERNAL_PEER = -13,
	BGP_ERR_REMOVE_PRIVATE_AS = -14,
	BGP_ERR_AF_UNCONFIGURED = -15,
	BGP_ERR_SOFT_RECONFIG_UNCONFIGURED = -16,
	BGP_ERR_INSTANCE_MISMATCH = -17,
	BGP_ERR_CANNOT_HAVE_LOCAL_AS_SAME_AS = -19,
	BGP_ERR_TCPSIG_FAILED = -20,
	BGP_ERR_NO_EBGP_MULTIHOP_WITH_TTLHACK = -21,
	BGP_ERR_NO_IBGP_WITH_TTLHACK = -22,
	BGP_ERR_NO_INTERFACE_CONFIG = -23,
	BGP_ERR_AS_OVERRIDE = -25,
	BGP_ERR_INVALID_DYNAMIC_NEIGHBORS_LIMIT = -26,
	BGP_ERR_DYNAMIC_NEIGHBORS_RANGE_EXISTS = -27,
	BGP_ERR_DYNAMIC_NEIGHBORS_RANGE_NOT_FOUND = -28,
	BGP_ERR_INVALID_FOR_DYNAMIC_PEER = -29,
	BGP_ERR_INVALID_FOR_DIRECT_PEER = -30,
	BGP_ERR_PEER_SAFI_CONFLICT = -31,

	/* BGP GR ERRORS */
	BGP_ERR_GR_INVALID_CMD = -32,
	BGP_ERR_GR_OPERATION_FAILED = -33,
	BGP_GR_NO_OPERATION = -34,

	/*BGP Open Policy ERRORS */
	BGP_ERR_INVALID_ROLE_NAME = -35,
	BGP_ERR_INVALID_INTERNAL_ROLE = -36
};

/*
 * Enumeration of different policy kinds a peer can be configured with.
 */
enum bgp_policy_type {
	BGP_POLICY_ROUTE_MAP,
	BGP_POLICY_FILTER_LIST,
	BGP_POLICY_PREFIX_LIST,
	BGP_POLICY_DISTRIBUTE_LIST,
};

/* peer_flag_change_type. */
enum peer_change_type {
	peer_change_none,
	peer_change_reset,
	peer_change_reset_in,
	peer_change_reset_out,
};

/* Enumeration of martian ("self") entry types.
 * Routes carrying fields that match a self entry are considered martians
 * and should be handled accordingly, i.e. dropped or import-filtered.
 * Note:
 *     These "martians" are separate from routes optionally allowed via
 *     'bgp allow-martian-nexthop'. The optionally allowed martians are
 *     simply prefixes caught by ipv4_martian(), i.e. routes outside
 *     the non-reserved IPv4 Unicast address space.
 */
enum bgp_martian_type {
	BGP_MARTIAN_IF_IP,  /* bgp->address_hash */
	BGP_MARTIAN_TUN_IP, /* bgp->tip_hash */
	BGP_MARTIAN_IF_MAC, /* bgp->self_mac_hash */
	BGP_MARTIAN_RMAC,   /* bgp->rmac */
	BGP_MARTIAN_SOO,    /* bgp->evpn_info->macvrf_soo */
};

extern const struct message bgp_martian_type_str[];
extern const char *bgp_martian_type2str(enum bgp_martian_type mt);

extern struct bgp_master *bm;
extern unsigned int multipath_num;

/* Prototypes. */
extern void bgp_terminate(void);
extern void bgp_reset(void);
extern void bgp_zclient_reset(void);
extern struct bgp *bgp_get_default(void);
extern struct bgp *bgp_lookup(as_t, const char *);
extern struct bgp *bgp_lookup_by_name(const char *);
extern struct bgp *bgp_lookup_by_vrf_id(vrf_id_t);
extern struct bgp *bgp_get_evpn(void);
extern void bgp_set_evpn(struct bgp *bgp);
extern struct peer *peer_lookup(struct bgp *, union sockunion *);
extern struct peer *peer_lookup_by_conf_if(struct bgp *, const char *);
extern struct peer *peer_lookup_by_hostname(struct bgp *, const char *);
extern void bgp_peer_conf_if_to_su_update(struct peer_connection *connection);
extern int peer_group_listen_range_del(struct peer_group *, struct prefix *);
extern struct peer_group *peer_group_lookup(struct bgp *, const char *);
extern struct peer_group *peer_group_get(struct bgp *, const char *);
extern struct peer *peer_create_bind_dynamic_neighbor(struct bgp *,
						      union sockunion *,
						      struct peer_group *);
extern struct prefix *
peer_group_lookup_dynamic_neighbor_range(struct peer_group *, struct prefix *);
extern struct peer_group *peer_group_lookup_dynamic_neighbor(struct bgp *,
							     struct prefix *,
							     struct prefix **);
extern struct peer *peer_lookup_dynamic_neighbor(struct bgp *,
						 union sockunion *);

/*
 * Peers are incredibly easy to memory leak
 * due to the various ways that they are actually used
 * Provide some functionality to debug locks and unlocks
 */
extern struct peer *peer_lock_with_caller(const char *, struct peer *);
extern struct peer *peer_unlock_with_caller(const char *, struct peer *);
#define peer_unlock(A) peer_unlock_with_caller(__FUNCTION__, (A))
#define peer_lock(B) peer_lock_with_caller(__FUNCTION__, (B))

extern enum bgp_peer_sort peer_sort(struct peer *peer);
extern enum bgp_peer_sort peer_sort_lookup(struct peer *peer);

extern bool peer_active(struct peer *);
extern bool peer_active_nego(struct peer *);
extern bool peer_afc_received(struct peer *peer);
extern bool peer_afc_advertised(struct peer *peer);
extern void bgp_recalculate_all_bestpaths(struct bgp *bgp);
extern struct peer *peer_create(union sockunion *su, const char *conf_if,
				struct bgp *bgp, as_t local_as, as_t remote_as,
				int as_type, struct peer_group *group,
				bool config_node, const char *as_str);
extern struct peer *peer_create_accept(struct bgp *);
extern void peer_xfer_config(struct peer *dst, struct peer *src);
extern char *peer_uptime(time_t uptime2, char *buf, size_t len, bool use_json,
			 json_object *json);

extern int bgp_config_write(struct vty *);

extern void bgp_master_init(struct event_loop *master, const int buffer_size,
			    struct list *addresses);

extern void bgp_init(unsigned short instance);
extern void bgp_pthreads_run(void);
extern void bgp_pthreads_finish(void);
extern void bgp_route_map_init(void);
extern void bgp_session_reset(struct peer *);

extern int bgp_option_set(int);
extern int bgp_option_unset(int);
extern int bgp_option_check(int);

/* set the bgp no-rib option during runtime and remove installed routes */
extern void bgp_option_norib_set_runtime(void);

/* unset the bgp no-rib option during runtime and reset all peers */
extern void bgp_option_norib_unset_runtime(void);

extern int bgp_get(struct bgp **bgp, as_t *as, const char *name,
		   enum bgp_instance_type kind, const char *as_pretty,
		   enum asnotation_mode asnotation);
extern void bgp_instance_up(struct bgp *);
extern void bgp_instance_down(struct bgp *);
extern int bgp_delete(struct bgp *);

extern int bgp_handle_socket(struct bgp *bgp, struct vrf *vrf,
			     vrf_id_t old_vrf_id, bool create);

extern void bgp_router_id_zebra_bump(vrf_id_t, const struct prefix *);
extern void bgp_router_id_static_set(struct bgp *, struct in_addr);

extern void bm_wait_for_fib_set(bool set);
extern void bgp_suppress_fib_pending_set(struct bgp *bgp, bool set);
extern void bgp_cluster_id_set(struct bgp *bgp, struct in_addr *cluster_id);
extern void bgp_cluster_id_unset(struct bgp *bgp);

extern void bgp_confederation_id_set(struct bgp *bgp, as_t as,
				     const char *as_str);
extern void bgp_confederation_id_unset(struct bgp *bgp);
extern bool bgp_confederation_peers_check(struct bgp *, as_t);

extern void bgp_confederation_peers_add(struct bgp *bgp, as_t as,
					const char *as_str);
extern void bgp_confederation_peers_remove(struct bgp *bgp, as_t as);

extern void bgp_timers_set(struct vty *vty, struct bgp *, uint32_t keepalive,
			   uint32_t holdtime, uint32_t connect_retry,
			   uint32_t delayopen);
extern void bgp_timers_unset(struct bgp *);

extern void bgp_default_local_preference_set(struct bgp *bgp,
					     uint32_t local_pref);
extern void bgp_default_local_preference_unset(struct bgp *bgp);

extern void bgp_default_subgroup_pkt_queue_max_set(struct bgp *bgp,
						   uint32_t queue_size);
extern void bgp_default_subgroup_pkt_queue_max_unset(struct bgp *bgp);

extern void bgp_listen_limit_set(struct bgp *bgp, int listen_limit);
extern void bgp_listen_limit_unset(struct bgp *bgp);

extern bool bgp_update_delay_active(struct bgp *);
extern bool bgp_update_delay_configured(struct bgp *);
extern bool bgp_afi_safi_peer_exists(struct bgp *bgp, afi_t afi, safi_t safi);
extern void peer_as_change(struct peer *peer, as_t as, int as_type,
			   const char *as_str);
extern int peer_remote_as(struct bgp *bgp, union sockunion *su,
			  const char *conf_if, as_t *as, int as_type,
			  const char *as_str);
extern int peer_group_remote_as(struct bgp *bgp, const char *peer_str, as_t *as,
				int as_type, const char *as_str);
extern int peer_delete(struct peer *peer);
extern void peer_notify_unconfig(struct peer *peer);
extern int peer_group_delete(struct peer_group *);
extern int peer_group_remote_as_delete(struct peer_group *);
extern int peer_group_listen_range_add(struct peer_group *, struct prefix *);
extern void peer_group_notify_unconfig(struct peer_group *group);

extern int peer_activate(struct peer *, afi_t, safi_t);
extern int peer_deactivate(struct peer *, afi_t, safi_t);

extern int peer_group_bind(struct bgp *, union sockunion *, struct peer *,
			   struct peer_group *, as_t *);

extern int peer_flag_set(struct peer *peer, uint64_t flag);
extern int peer_flag_unset(struct peer *peer, uint64_t flag);
extern void peer_flag_inherit(struct peer *peer, uint64_t flag);

extern int peer_af_flag_set(struct peer *peer, afi_t afi, safi_t safi,
			    uint64_t flag);
extern int peer_af_flag_unset(struct peer *peer, afi_t afi, safi_t safi,
			      uint64_t flag);
extern bool peer_af_flag_check(struct peer *peer, afi_t afi, safi_t safi,
			       uint64_t flag);
extern void peer_af_flag_inherit(struct peer *peer, afi_t afi, safi_t safi,
				 uint64_t flag);
extern void peer_change_action(struct peer *peer, afi_t afi, safi_t safi,
			       enum peer_change_type type);

extern int peer_ebgp_multihop_set(struct peer *, int);
extern int peer_ebgp_multihop_unset(struct peer *);
extern int is_ebgp_multihop_configured(struct peer *peer);

extern int peer_role_set(struct peer *peer, uint8_t role, bool strict_mode);
extern int peer_role_unset(struct peer *peer);

extern void peer_description_set(struct peer *, const char *);
extern void peer_description_unset(struct peer *);

extern int peer_update_source_if_set(struct peer *, const char *);
extern void peer_update_source_addr_set(struct peer *peer,
					const union sockunion *su);
extern void peer_update_source_unset(struct peer *peer);

extern int peer_default_originate_set(struct peer *peer, afi_t afi, safi_t safi,
				      const char *rmap,
				      struct route_map *route_map);
extern int peer_default_originate_unset(struct peer *, afi_t, safi_t);
extern void bgp_tcp_keepalive_set(struct bgp *bgp, uint16_t idle,
				  uint16_t interval, uint16_t probes);
extern void bgp_tcp_keepalive_unset(struct bgp *bgp);

extern void peer_port_set(struct peer *, uint16_t);
extern void peer_port_unset(struct peer *);

extern int peer_weight_set(struct peer *, afi_t, safi_t, uint16_t);
extern int peer_weight_unset(struct peer *, afi_t, safi_t);

extern int peer_timers_set(struct peer *, uint32_t keepalive,
			   uint32_t holdtime);
extern int peer_timers_unset(struct peer *);

extern int peer_timers_connect_set(struct peer *, uint32_t);
extern int peer_timers_connect_unset(struct peer *);

extern int peer_advertise_interval_set(struct peer *, uint32_t);
extern int peer_advertise_interval_unset(struct peer *);

extern int peer_timers_delayopen_set(struct peer *peer, uint32_t delayopen);
extern int peer_timers_delayopen_unset(struct peer *peer);

extern void peer_interface_set(struct peer *, const char *);
extern void peer_interface_unset(struct peer *);

extern int peer_distribute_set(struct peer *, afi_t, safi_t, int, const char *);
extern int peer_distribute_unset(struct peer *, afi_t, safi_t, int);

extern int peer_allowas_in_set(struct peer *, afi_t, safi_t, int, int);
extern int peer_allowas_in_unset(struct peer *, afi_t, safi_t);

extern int peer_local_as_set(struct peer *peer, as_t as, bool no_prepend,
			     bool replace_as, const char *as_str);
extern int peer_local_as_unset(struct peer *);

extern int peer_prefix_list_set(struct peer *, afi_t, safi_t, int,
				const char *);
extern int peer_prefix_list_unset(struct peer *, afi_t, safi_t, int);

extern int peer_aslist_set(struct peer *, afi_t, safi_t, int, const char *);
extern int peer_aslist_unset(struct peer *, afi_t, safi_t, int);

extern int peer_route_map_set(struct peer *peer, afi_t afi, safi_t safi, int,
			      const char *name, struct route_map *route_map);
extern int peer_route_map_unset(struct peer *, afi_t, safi_t, int);

extern int peer_unsuppress_map_set(struct peer *peer, afi_t afi, safi_t safi,
				   const char *name,
				   struct route_map *route_map);

extern int peer_advertise_map_set(struct peer *peer, afi_t afi, safi_t safi,
				  const char *advertise_name,
				  struct route_map *advertise_map,
				  const char *condition_name,
				  struct route_map *condition_map,
				  bool condition);

extern int peer_password_set(struct peer *, const char *);
extern int peer_password_unset(struct peer *);

extern int peer_unsuppress_map_unset(struct peer *, afi_t, safi_t);

extern int peer_advertise_map_unset(struct peer *peer, afi_t afi, safi_t safi,
				    const char *advertise_name,
				    struct route_map *advertise_map,
				    const char *condition_name,
				    struct route_map *condition_map,
				    bool condition);

extern int peer_maximum_prefix_set(struct peer *, afi_t, safi_t, uint32_t,
				   uint8_t, int, uint16_t, bool force);
extern int peer_maximum_prefix_unset(struct peer *, afi_t, safi_t);

extern void peer_maximum_prefix_out_refresh_routes(struct peer *peer, afi_t afi,
						   safi_t safi);
extern int peer_maximum_prefix_out_set(struct peer *peer, afi_t afi,
				       safi_t safi, uint32_t max);
extern int peer_maximum_prefix_out_unset(struct peer *peer, afi_t afi,
					 safi_t safi);

extern int peer_clear(struct peer *, struct listnode **);
extern int peer_clear_soft(struct peer *, afi_t, safi_t, enum bgp_clear_type);

extern int peer_ttl_security_hops_set(struct peer *, int);
extern int peer_ttl_security_hops_unset(struct peer *);

extern void peer_tx_shutdown_message_set(struct peer *, const char *msg);
extern void peer_tx_shutdown_message_unset(struct peer *);

extern void bgp_route_map_update_timer(struct event *thread);
extern const char *bgp_get_name_by_role(uint8_t role);
extern enum asnotation_mode bgp_get_asnotation(struct bgp *bgp);

extern void bgp_route_map_terminate(void);

extern bool bgp_route_map_has_extcommunity_rt(const struct route_map *map);

extern int peer_cmp(struct peer *p1, struct peer *p2);

extern int bgp_map_afi_safi_iana2int(iana_afi_t pkt_afi, iana_safi_t pkt_safi,
				     afi_t *afi, safi_t *safi);
extern int bgp_map_afi_safi_int2iana(afi_t afi, safi_t safi,
				     iana_afi_t *pkt_afi,
				     iana_safi_t *pkt_safi);

extern struct peer_af *peer_af_create(struct peer *, afi_t, safi_t);
extern struct peer_af *peer_af_find(struct peer *, afi_t, safi_t);
extern int peer_af_delete(struct peer *, afi_t, safi_t);

extern void bgp_shutdown_enable(struct bgp *bgp, const char *msg);
extern void bgp_shutdown_disable(struct bgp *bgp);

extern void bgp_close(void);
extern void bgp_free(struct bgp *);
void bgp_gr_apply_running_config(void);

/* BGP GR */
int bgp_global_gr_init(struct bgp *bgp);
int bgp_peer_gr_init(struct peer *peer);


#define BGP_GR_ROUTER_DETECT_AND_SEND_CAPABILITY_TO_ZEBRA(_bgp, _peer_list)    \
	do {                                                                   \
		struct peer *peer_loop;                                        \
		bool gr_router_detected = false;                               \
		struct listnode *node = {0};                                   \
		for (ALL_LIST_ELEMENTS_RO(_peer_list, node, peer_loop)) {      \
			if (CHECK_FLAG(peer_loop->flags,                       \
				       PEER_FLAG_GRACEFUL_RESTART))            \
				gr_router_detected = true;                     \
		}                                                              \
		if (gr_router_detected                                         \
		    && _bgp->present_zebra_gr_state == ZEBRA_GR_DISABLE) {     \
			bgp_zebra_send_capabilities(_bgp, false);              \
		} else if (!gr_router_detected                                 \
			   && _bgp->present_zebra_gr_state                     \
				      == ZEBRA_GR_ENABLE) {                    \
			bgp_zebra_send_capabilities(_bgp, true);               \
		}                                                              \
	} while (0)

static inline struct bgp *bgp_lock(struct bgp *bgp)
{
	bgp->lock++;
	return bgp;
}

static inline void bgp_unlock(struct bgp *bgp)
{
	assert(bgp->lock > 0);
	if (--bgp->lock == 0)
		bgp_free(bgp);
}

static inline int afindex(afi_t afi, safi_t safi)
{
	switch (afi) {
	case AFI_IP:
		switch (safi) {
		case SAFI_UNICAST:
			return BGP_AF_IPV4_UNICAST;
		case SAFI_MULTICAST:
			return BGP_AF_IPV4_MULTICAST;
		case SAFI_LABELED_UNICAST:
			return BGP_AF_IPV4_LBL_UNICAST;
		case SAFI_MPLS_VPN:
			return BGP_AF_IPV4_VPN;
		case SAFI_ENCAP:
			return BGP_AF_IPV4_ENCAP;
		case SAFI_FLOWSPEC:
			return BGP_AF_IPV4_FLOWSPEC;
		case SAFI_EVPN:
		case SAFI_UNSPEC:
		case SAFI_MAX:
			return BGP_AF_MAX;
		}
		break;
	case AFI_IP6:
		switch (safi) {
		case SAFI_UNICAST:
			return BGP_AF_IPV6_UNICAST;
		case SAFI_MULTICAST:
			return BGP_AF_IPV6_MULTICAST;
		case SAFI_LABELED_UNICAST:
			return BGP_AF_IPV6_LBL_UNICAST;
		case SAFI_MPLS_VPN:
			return BGP_AF_IPV6_VPN;
		case SAFI_ENCAP:
			return BGP_AF_IPV6_ENCAP;
		case SAFI_FLOWSPEC:
			return BGP_AF_IPV6_FLOWSPEC;
		case SAFI_EVPN:
		case SAFI_UNSPEC:
		case SAFI_MAX:
			return BGP_AF_MAX;
		}
		break;
	case AFI_L2VPN:
		switch (safi) {
		case SAFI_EVPN:
			return BGP_AF_L2VPN_EVPN;
		case SAFI_UNICAST:
		case SAFI_MULTICAST:
		case SAFI_LABELED_UNICAST:
		case SAFI_MPLS_VPN:
		case SAFI_ENCAP:
		case SAFI_FLOWSPEC:
		case SAFI_UNSPEC:
		case SAFI_MAX:
			return BGP_AF_MAX;
		}
		break;
	case AFI_UNSPEC:
	case AFI_MAX:
		return BGP_AF_MAX;
	}

	assert(!"Reached end of function we should never hit");
}

/* If the peer is not a peer-group but is bound to a peer-group return 1 */
static inline int peer_group_active(struct peer *peer)
{
	if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP) && peer->group)
		return 1;
	return 0;
}

/* If peer is negotiated at least one address family return 1. */
static inline int peer_afi_active_nego(const struct peer *peer, afi_t afi)
{
	if (peer->afc_nego[afi][SAFI_UNICAST]
	    || peer->afc_nego[afi][SAFI_MULTICAST]
	    || peer->afc_nego[afi][SAFI_LABELED_UNICAST]
	    || peer->afc_nego[afi][SAFI_MPLS_VPN]
	    || peer->afc_nego[afi][SAFI_ENCAP]
	    || peer->afc_nego[afi][SAFI_FLOWSPEC]
	    || peer->afc_nego[afi][SAFI_EVPN])
		return 1;
	return 0;
}

/* If at least one address family activated for group, return 1. */
static inline int peer_group_af_configured(struct peer_group *group)
{
	struct peer *peer = group->conf;

	if (peer->afc[AFI_IP][SAFI_UNICAST] || peer->afc[AFI_IP][SAFI_MULTICAST]
	    || peer->afc[AFI_IP][SAFI_LABELED_UNICAST]
	    || peer->afc[AFI_IP][SAFI_FLOWSPEC]
	    || peer->afc[AFI_IP][SAFI_MPLS_VPN] || peer->afc[AFI_IP][SAFI_ENCAP]
	    || peer->afc[AFI_IP6][SAFI_UNICAST]
	    || peer->afc[AFI_IP6][SAFI_MULTICAST]
	    || peer->afc[AFI_IP6][SAFI_LABELED_UNICAST]
	    || peer->afc[AFI_IP6][SAFI_MPLS_VPN]
	    || peer->afc[AFI_IP6][SAFI_ENCAP]
	    || peer->afc[AFI_IP6][SAFI_FLOWSPEC]
	    || peer->afc[AFI_L2VPN][SAFI_EVPN])
		return 1;
	return 0;
}

static inline char *timestamp_string(time_t ts, char *timebuf)
{
	time_t tbuf;

	tbuf = time(NULL) - (monotime(NULL) - ts);
	return ctime_r(&tbuf, timebuf);
}

static inline bool peer_established(struct peer_connection *connection)
{
	return connection->status == Established;
}

static inline bool peer_dynamic_neighbor(struct peer *peer)
{
	return CHECK_FLAG(peer->flags, PEER_FLAG_DYNAMIC_NEIGHBOR);
}

static inline bool peer_dynamic_neighbor_no_nsf(struct peer *peer)
{
	return (peer_dynamic_neighbor(peer) &&
		!CHECK_FLAG(peer->sflags, PEER_STATUS_NSF_WAIT));
}

static inline int peer_cap_enhe(struct peer *peer, afi_t afi, safi_t safi)
{
	return (CHECK_FLAG(peer->af_cap[afi][safi], PEER_CAP_ENHE_AF_NEGO));
}

/* Lookup VRF for BGP instance based on its type. */
static inline struct vrf *bgp_vrf_lookup_by_instance_type(struct bgp *bgp)
{
	struct vrf *vrf;

	if (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT)
		vrf = vrf_lookup_by_id(VRF_DEFAULT);
	else if (bgp->inst_type == BGP_INSTANCE_TYPE_VRF)
		vrf = vrf_lookup_by_name(bgp->name);
	else
		vrf = NULL;

	return vrf;
}

static inline uint32_t bgp_vrf_interfaces(struct bgp *bgp, bool active)
{
	struct vrf *vrf;
	struct interface *ifp;
	uint32_t count = 0;

	/* if there is one interface in the vrf which is up then it is deemed
	 *  active
	 */
	vrf = bgp_vrf_lookup_by_instance_type(bgp);
	if (vrf == NULL)
		return 0;
	RB_FOREACH (ifp, if_name_head, &vrf->ifaces_by_name) {
		if (strcmp(ifp->name, bgp->name) == 0)
			continue;
		if (!active || if_is_up(ifp))
			count++;
	}
	return count;
}

/* Link BGP instance to VRF. */
static inline void bgp_vrf_link(struct bgp *bgp, struct vrf *vrf)
{
	bgp->vrf_id = vrf->vrf_id;
	if (vrf->info != (void *)bgp)
		vrf->info = (void *)bgp_lock(bgp);
}

/* Unlink BGP instance from VRF. */
static inline void bgp_vrf_unlink(struct bgp *bgp, struct vrf *vrf)
{
	if (vrf->info == (void *)bgp) {
		vrf->info = NULL;
		bgp_unlock(bgp);
	}
	bgp->vrf_id = VRF_UNKNOWN;
}

static inline bool bgp_in_graceful_shutdown(struct bgp *bgp)
{
	/* True if either set for this instance or globally */
	return (!!CHECK_FLAG(bgp->flags, BGP_FLAG_GRACEFUL_SHUTDOWN) ||
	        !!CHECK_FLAG(bm->flags, BM_FLAG_GRACEFUL_SHUTDOWN));
}

/* For benefit of rfapi */
extern struct peer *peer_new(struct bgp *bgp);

extern struct peer *peer_lookup_in_view(struct vty *vty, struct bgp *bgp,
					const char *ip_str, bool use_json);
extern int bgp_lookup_by_as_name_type(struct bgp **bgp_val, as_t *as,
				      const char *name,
				      enum bgp_instance_type inst_type);

/* Hooks */
DECLARE_HOOK(bgp_vrf_status_changed, (struct bgp *bgp, struct interface *ifp),
	     (bgp, ifp));
DECLARE_HOOK(peer_status_changed, (struct peer *peer), (peer));
DECLARE_HOOK(bgp_snmp_init_stats, (struct bgp *bgp), (bgp));
DECLARE_HOOK(bgp_snmp_update_last_changed, (struct bgp *bgp), (bgp));
DECLARE_HOOK(bgp_snmp_update_stats,
	     (struct bgp_dest *rn, struct bgp_path_info *pi, bool added),
	     (rn, pi, added));
DECLARE_HOOK(bgp_rpki_prefix_status,
	     (struct peer * peer, struct attr *attr,
	      const struct prefix *prefix),
	     (peer, attr, prefix));

void peer_nsf_stop(struct peer *peer);

void peer_tcp_mss_set(struct peer *peer, uint32_t tcp_mss);
void peer_tcp_mss_unset(struct peer *peer);

extern void bgp_recalculate_afi_safi_bestpaths(struct bgp *bgp, afi_t afi,
					       safi_t safi);
extern void peer_on_policy_change(struct peer *peer, afi_t afi, safi_t safi,
				  int outbound);
extern bool bgp_path_attribute_discard(struct peer *peer, char *buf,
				       size_t size);
extern bool bgp_path_attribute_treat_as_withdraw(struct peer *peer, char *buf,
						 size_t size);

extern void srv6_function_free(struct bgp_srv6_function *func);

#ifdef _FRR_ATTRIBUTE_PRINTFRR
/* clang-format off */
#pragma FRR printfrr_ext "%pBP" (struct peer *)
/* clang-format on */
#endif

#endif /* _QUAGGA_BGPD_H */