Line data Source code
1 : #include "fd_ping_tracker.h"
2 :
3 : #include "../../ballet/sha256/fd_sha256.h"
4 : #include "../../util/log/fd_log.h"
5 :
6 42 : #define FD_PING_TRACKER_STATE_UNPINGED (0)
7 60 : #define FD_PING_TRACKER_STATE_INVALID (1)
8 72 : #define FD_PING_TRACKER_STATE_VALID (2)
9 18 : #define FD_PING_TRACKER_STATE_VALID_REFRESHING (3)
10 :
11 : struct pubkey_private {
12 : uchar b[ 32UL ];
13 : };
14 :
15 : typedef struct pubkey_private pubkey_private_t;
16 :
17 : struct fd_ping_peer {
18 : fd_ip4_port_t address;
19 : pubkey_private_t identity_pubkey;
20 : uchar ping_token[ 32UL ];
21 : uchar expected_pong_hash[ 32UL ];
22 :
23 : uchar state;
24 :
25 : long next_ping_nanos;
26 : long valid_until_nanos;
27 : long last_rx_nanos;
28 :
29 : ulong pool_next;
30 :
31 : ulong lru_prev;
32 : ulong lru_next;
33 :
34 : ulong map_next;
35 : ulong map_prev;
36 :
37 : union {
38 : struct {
39 : ulong unpinged_next;
40 : ulong unpinged_prev;
41 : };
42 :
43 : struct {
44 : ulong waiting_next;
45 : ulong waiting_prev;
46 : };
47 :
48 : struct {
49 : ulong refreshing_next;
50 : ulong refreshing_prev;
51 : };
52 : };
53 : };
54 :
55 : typedef struct fd_ping_peer fd_ping_peer_t;
56 :
57 : #define POOL_NAME pool
58 1376310 : #define POOL_NEXT pool_next
59 42 : #define POOL_T fd_ping_peer_t
60 : #include "../../util/tmpl/fd_pool.c"
61 :
62 : #define DLIST_NAME lru_list
63 : #define DLIST_ELE_T fd_ping_peer_t
64 156 : #define DLIST_PREV lru_prev
65 156 : #define DLIST_NEXT lru_next
66 : #include "../../util/tmpl/fd_dlist.c"
67 :
68 : #define DLIST_NAME unpinged_list
69 : #define DLIST_ELE_T fd_ping_peer_t
70 42 : #define DLIST_PREV unpinged_prev
71 72 : #define DLIST_NEXT unpinged_next
72 : #include "../../util/tmpl/fd_dlist.c"
73 :
74 : #define DLIST_NAME waiting_list
75 : #define DLIST_ELE_T fd_ping_peer_t
76 30 : #define DLIST_PREV waiting_prev
77 36 : #define DLIST_NEXT waiting_next
78 : #include "../../util/tmpl/fd_dlist.c"
79 :
80 : #define DLIST_NAME refreshing_list
81 : #define DLIST_ELE_T fd_ping_peer_t
82 84 : #define DLIST_PREV refreshing_prev
83 102 : #define DLIST_NEXT refreshing_next
84 : #include "../../util/tmpl/fd_dlist.c"
85 :
86 : #define MAP_NAME peer_map
87 18 : #define MAP_ELE_T fd_ping_peer_t
88 : #define MAP_KEY_T pubkey_private_t
89 54 : #define MAP_KEY identity_pubkey
90 148767 : #define MAP_IDX_T ulong
91 54 : #define MAP_NEXT map_next
92 36 : #define MAP_PREV map_prev
93 74409 : #define MAP_KEY_HASH(k,s) ((s) ^ fd_ulong_load_8( (k)->b ))
94 75 : #define MAP_KEY_EQ(k0,k1) (!memcmp((k0)->b, (k1)->b, 32UL))
95 : #define MAP_OPTIMIZE_RANDOM_ACCESS_REMOVAL 1
96 : #include "../../util/tmpl/fd_map_chain.c"
97 :
98 : struct __attribute__((aligned(FD_PING_TRACKER_ALIGN))) fd_ping_tracker_private {
99 : fd_rng_t * rng;
100 : fd_sha256_t sha[1];
101 :
102 : ulong entrypoints_cnt;
103 : fd_ip4_port_t * entrypoints;
104 :
105 : fd_ping_tracker_metrics_t metrics[1];
106 :
107 : fd_ping_peer_t * pool;
108 : lru_list_t * lru;
109 :
110 : unpinged_list_t * unpinged;
111 : waiting_list_t * waiting;
112 : refreshing_list_t * refreshing;
113 :
114 : peer_map_t * peers;
115 :
116 : fd_ping_tracker_change_fn change_fn;
117 : void * change_fn_ctx;
118 :
119 : ulong magic; /* ==FD_PING_TRACKER_MAGIC */
120 : };
121 :
122 : FD_FN_CONST ulong
123 63 : fd_ping_tracker_align( void ) {
124 63 : return FD_PING_TRACKER_ALIGN;
125 63 : }
126 :
127 : FD_FN_CONST ulong
128 21 : fd_ping_tracker_footprint( ulong entrypoints_len ) {
129 21 : ulong l;
130 21 : l = FD_LAYOUT_INIT;
131 21 : l = FD_LAYOUT_APPEND( l, FD_PING_TRACKER_ALIGN, sizeof(fd_ping_tracker_t) );
132 21 : l = FD_LAYOUT_APPEND( l, alignof(fd_ip4_port_t), entrypoints_len*sizeof(fd_ip4_port_t) );
133 21 : l = FD_LAYOUT_APPEND( l, pool_align(), pool_footprint( FD_PING_TRACKER_MAX ) );
134 21 : l = FD_LAYOUT_APPEND( l, lru_list_align(), lru_list_footprint() );
135 21 : l = FD_LAYOUT_APPEND( l, unpinged_list_align(), unpinged_list_footprint() );
136 21 : l = FD_LAYOUT_APPEND( l, waiting_list_align(), waiting_list_footprint() );
137 21 : l = FD_LAYOUT_APPEND( l, refreshing_list_align(), refreshing_list_footprint() );
138 21 : l = FD_LAYOUT_APPEND( l, peer_map_align(), peer_map_footprint( 8192UL ) );
139 21 : return FD_LAYOUT_FINI( l, FD_PING_TRACKER_ALIGN );
140 21 : }
141 :
142 : void *
143 : fd_ping_tracker_new( void * shmem,
144 : fd_rng_t * rng,
145 : ulong entrypoints_len,
146 : fd_ip4_port_t const * entrypoints,
147 : fd_ping_tracker_change_fn change_fn,
148 21 : void * change_fn_ctx ) {
149 21 : if( FD_UNLIKELY( !shmem ) ) {
150 0 : FD_LOG_WARNING(( "NULL shmem" ));
151 0 : return NULL;
152 0 : }
153 :
154 21 : if( FD_UNLIKELY( !rng ) ) {
155 0 : FD_LOG_WARNING(( "NULL rng" ));
156 0 : return NULL;
157 0 : }
158 :
159 21 : if( FD_UNLIKELY( !fd_ulong_is_aligned( (ulong)shmem, fd_ping_tracker_align() ) ) ) {
160 0 : FD_LOG_WARNING(( "misaligned shmem" ));
161 0 : return NULL;
162 0 : }
163 :
164 21 : FD_SCRATCH_ALLOC_INIT( l, shmem );
165 21 : fd_ping_tracker_t * ping_tracker = FD_SCRATCH_ALLOC_APPEND( l, FD_PING_TRACKER_ALIGN, sizeof(fd_ping_tracker_t) );
166 21 : void * _entrypoints = FD_SCRATCH_ALLOC_APPEND( l, alignof(fd_ip4_port_t), entrypoints_len*sizeof(fd_ip4_port_t) );
167 21 : void * _pool = FD_SCRATCH_ALLOC_APPEND( l, pool_align(), pool_footprint( FD_PING_TRACKER_MAX ) );
168 21 : void * _lru = FD_SCRATCH_ALLOC_APPEND( l, lru_list_align(), lru_list_footprint() );
169 21 : void * _unpinged = FD_SCRATCH_ALLOC_APPEND( l, unpinged_list_align(), unpinged_list_footprint() );
170 21 : void * _waiting = FD_SCRATCH_ALLOC_APPEND( l, waiting_list_align(), waiting_list_footprint() );
171 21 : void * _refreshing = FD_SCRATCH_ALLOC_APPEND( l, refreshing_list_align(), refreshing_list_footprint() );
172 21 : void * _peers = FD_SCRATCH_ALLOC_APPEND( l, peer_map_align(), peer_map_footprint( 8192UL ) );
173 :
174 21 : ping_tracker->rng = rng;
175 21 : ping_tracker->pool = pool_join( pool_new( _pool, FD_PING_TRACKER_MAX ) );
176 21 : FD_TEST( ping_tracker->pool );
177 21 : ping_tracker->lru = lru_list_join( lru_list_new( _lru ) );
178 21 : FD_TEST( ping_tracker->lru );
179 21 : ping_tracker->unpinged = unpinged_list_join( unpinged_list_new( _unpinged ) );
180 21 : FD_TEST( ping_tracker->unpinged );
181 21 : ping_tracker->waiting = waiting_list_join( waiting_list_new( _waiting ) );
182 21 : FD_TEST( ping_tracker->waiting );
183 21 : ping_tracker->refreshing = refreshing_list_join( refreshing_list_new( _refreshing ) );
184 21 : FD_TEST( ping_tracker->refreshing );
185 21 : ping_tracker->peers = peer_map_join( peer_map_new( _peers, 8192UL, fd_rng_ulong( rng ) ) );
186 21 : FD_TEST( ping_tracker->peers );
187 :
188 21 : ping_tracker->entrypoints_cnt = entrypoints_len;
189 21 : ping_tracker->entrypoints = (fd_ip4_port_t *)_entrypoints;
190 21 : fd_memcpy( ping_tracker->entrypoints, entrypoints, entrypoints_len*sizeof(fd_ip4_port_t) );
191 :
192 21 : ping_tracker->change_fn = change_fn;
193 21 : ping_tracker->change_fn_ctx = change_fn_ctx;
194 :
195 21 : FD_TEST( fd_sha256_join( fd_sha256_new( ping_tracker->sha ) ) );
196 :
197 21 : fd_memset( ping_tracker->metrics, 0, sizeof(fd_ping_tracker_metrics_t) );
198 :
199 21 : FD_COMPILER_MFENCE();
200 21 : FD_VOLATILE( ping_tracker->magic ) = FD_PING_TRACKER_MAGIC;
201 21 : FD_COMPILER_MFENCE();
202 :
203 21 : return (void *)ping_tracker;
204 21 : }
205 :
206 : fd_ping_tracker_t *
207 21 : fd_ping_tracker_join( void * shpt ) {
208 21 : if( FD_UNLIKELY( !shpt ) ) {
209 0 : FD_LOG_WARNING(( "NULL shpt" ));
210 0 : return NULL;
211 0 : }
212 :
213 21 : if( FD_UNLIKELY( !fd_ulong_is_aligned( (ulong)shpt, fd_ping_tracker_align() ) ) ) {
214 0 : FD_LOG_WARNING(( "misaligned shpt" ));
215 0 : return NULL;
216 0 : }
217 :
218 21 : fd_ping_tracker_t * ping_tracker = (fd_ping_tracker_t *)shpt;
219 :
220 21 : if( FD_UNLIKELY( ping_tracker->magic!=FD_PING_TRACKER_MAGIC ) ) {
221 0 : FD_LOG_WARNING(( "bad magic" ));
222 0 : return NULL;
223 0 : }
224 :
225 21 : return ping_tracker;
226 21 : }
227 :
228 : static inline void
229 : hash_ping_token( uchar const * ping_token,
230 : uchar expected_pong_token[ static 32UL ],
231 39 : fd_sha256_t * sha ) {
232 39 : fd_sha256_init( sha );
233 39 : fd_sha256_append( sha, "SOLANA_PING_PONG", 16UL );
234 39 : fd_sha256_append( sha, ping_token, 32UL );
235 39 : fd_sha256_fini( sha, expected_pong_token );
236 39 : }
237 :
238 : static void
239 : remove_tracking( fd_ping_tracker_t * ping_tracker,
240 42 : fd_ping_peer_t * peer ) {
241 42 : if( FD_UNLIKELY( peer->state==FD_PING_TRACKER_STATE_UNPINGED ) ) unpinged_list_ele_remove( ping_tracker->unpinged, peer, ping_tracker->pool );
242 39 : else if( FD_LIKELY( peer->state==FD_PING_TRACKER_STATE_VALID ) ) waiting_list_ele_remove( ping_tracker->waiting, peer, ping_tracker->pool );
243 30 : else refreshing_list_ele_remove( ping_tracker->refreshing, peer, ping_tracker->pool );
244 42 : }
245 :
246 : static void
247 : generate_ping_token( fd_ping_peer_t * peer,
248 39 : fd_rng_t * rng ) {
249 39 : fd_memcpy( peer->ping_token, "SOLANA_PING_PONG", 16UL );
250 663 : for( ulong i=16UL; i<32UL; i++ ) peer->ping_token[ i ] = fd_rng_uchar( rng );
251 39 : }
252 :
253 : static inline void
254 : remove_peer( fd_ping_tracker_t * ping_tracker,
255 : fd_ping_peer_t * peer,
256 : long now,
257 18 : int change_type ) {
258 18 : peer_map_ele_remove_fast( ping_tracker->peers, peer, ping_tracker->pool );
259 18 : lru_list_ele_remove( ping_tracker->lru, peer, ping_tracker->pool );
260 18 : remove_tracking( ping_tracker, peer );
261 18 : if( FD_LIKELY( peer->state==FD_PING_TRACKER_STATE_VALID || peer->state==FD_PING_TRACKER_STATE_VALID_REFRESHING ) ) {
262 6 : ping_tracker->change_fn( ping_tracker->change_fn_ctx, peer->identity_pubkey.b, peer->address, now, change_type );
263 6 : }
264 18 : switch( peer->state ) {
265 3 : case FD_PING_TRACKER_STATE_UNPINGED: ping_tracker->metrics->unpinged_cnt--; break;
266 9 : case FD_PING_TRACKER_STATE_INVALID: ping_tracker->metrics->invalid_cnt--; break;
267 3 : case FD_PING_TRACKER_STATE_VALID: ping_tracker->metrics->valid_cnt--; break;
268 3 : case FD_PING_TRACKER_STATE_VALID_REFRESHING: ping_tracker->metrics->refreshing_cnt--; break;
269 0 : default: FD_LOG_ERR(( "Unknown state %d", peer->state )); return;
270 18 : }
271 18 : pool_ele_release( ping_tracker->pool, peer );
272 18 : }
273 :
274 : void
275 : fd_ping_tracker_track( fd_ping_tracker_t * ping_tracker,
276 : uchar const * peer_pubkey,
277 : ulong peer_stake,
278 : fd_ip4_port_t peer_address,
279 74268 : long now ) {
280 74268 : if( FD_UNLIKELY( !peer_address.addr ) ) return;
281 :
282 74268 : fd_ping_peer_t * peer = peer_map_ele_query( ping_tracker->peers, fd_type_pun_const( peer_pubkey ), NULL, ping_tracker->pool );
283 :
284 74268 : if( FD_UNLIKELY( !peer ) ) {
285 74253 : if( FD_LIKELY( peer_stake>=1000000000UL ) ) return;
286 :
287 36 : if( FD_UNLIKELY( !pool_free( ping_tracker->pool ) ) ) {
288 0 : peer = lru_list_ele_peek_head( ping_tracker->lru, ping_tracker->pool );
289 0 : remove_peer( ping_tracker, peer, now, FD_PING_TRACKER_CHANGE_TYPE_INACTIVE );
290 0 : ping_tracker->metrics->peers_evicted++;
291 0 : }
292 36 : peer = pool_ele_acquire( ping_tracker->pool );
293 :
294 36 : fd_memcpy( peer->identity_pubkey.b, peer_pubkey, 32UL );
295 36 : peer->address = peer_address;
296 36 : peer->valid_until_nanos = 0L;
297 36 : peer->next_ping_nanos = now;
298 36 : peer->state = FD_PING_TRACKER_STATE_UNPINGED;
299 36 : ping_tracker->metrics->unpinged_cnt++;
300 36 : ping_tracker->metrics->tracked_cnt++;
301 :
302 36 : generate_ping_token( peer, ping_tracker->rng );
303 36 : hash_ping_token( peer->ping_token, peer->expected_pong_hash, ping_tracker->sha );
304 :
305 36 : unpinged_list_ele_push_head( ping_tracker->unpinged, peer, ping_tracker->pool );
306 36 : peer_map_ele_insert( ping_tracker->peers, peer, ping_tracker->pool );
307 36 : lru_list_ele_push_tail( ping_tracker->lru, peer, ping_tracker->pool );
308 36 : } else {
309 15 : if( FD_LIKELY( peer_stake>=1000000000UL ) ) {
310 : /* Node went from unstaked (or low staked) to >=1 SOL. No longer
311 : need to ping it. */
312 0 : ping_tracker->metrics->stake_changed_cnt++;
313 0 : remove_peer( ping_tracker, peer, now, FD_PING_TRACKER_CHANGE_TYPE_INACTIVE_STAKED );
314 0 : return;
315 0 : }
316 :
317 15 : if( FD_UNLIKELY( peer_address.addr!=peer->address.addr || peer_address.port!=peer->address.port ) ) {
318 : /* Node changed address, update the address. Any existing pongs
319 : are no longer valid. */
320 3 : peer->address = peer_address;
321 3 : peer->valid_until_nanos = 0UL;
322 3 : remove_tracking( ping_tracker, peer );
323 3 : if( FD_LIKELY( peer->state==FD_PING_TRACKER_STATE_VALID || peer->state==FD_PING_TRACKER_STATE_VALID_REFRESHING ) ) {
324 3 : ping_tracker->change_fn( ping_tracker->change_fn_ctx, peer->identity_pubkey.b, peer->address, now, FD_PING_TRACKER_CHANGE_TYPE_INACTIVE );
325 3 : }
326 3 : ping_tracker->metrics->address_changed_cnt++;
327 3 : switch( peer->state ) {
328 0 : case FD_PING_TRACKER_STATE_UNPINGED: ping_tracker->metrics->unpinged_cnt--; break;
329 0 : case FD_PING_TRACKER_STATE_INVALID: ping_tracker->metrics->invalid_cnt--; break;
330 3 : case FD_PING_TRACKER_STATE_VALID: ping_tracker->metrics->valid_cnt--; break;
331 0 : case FD_PING_TRACKER_STATE_VALID_REFRESHING: ping_tracker->metrics->refreshing_cnt--; break;
332 0 : default: FD_LOG_ERR(( "Unknown state %d", peer->state )); return;
333 3 : }
334 3 : peer->next_ping_nanos = now;
335 3 : peer->state = FD_PING_TRACKER_STATE_UNPINGED;
336 3 : ping_tracker->metrics->unpinged_cnt++;
337 3 : generate_ping_token( peer, ping_tracker->rng );
338 3 : hash_ping_token( peer->ping_token, peer->expected_pong_hash, ping_tracker->sha );
339 :
340 3 : unpinged_list_ele_push_head( ping_tracker->unpinged, peer, ping_tracker->pool );
341 3 : }
342 15 : }
343 :
344 51 : peer->last_rx_nanos = now;
345 51 : lru_list_ele_remove( ping_tracker->lru, peer, ping_tracker->pool );
346 51 : lru_list_ele_push_tail( ping_tracker->lru, peer, ping_tracker->pool );
347 51 : }
348 :
349 : void
350 : fd_ping_tracker_register( fd_ping_tracker_t * ping_tracker,
351 : uchar const * peer_pubkey,
352 : ulong peer_stake,
353 : fd_ip4_port_t peer_address,
354 : uchar const * pong_token,
355 30 : long now ) {
356 30 : if( FD_UNLIKELY( peer_stake>=1000000000UL ) ) {
357 0 : ping_tracker->metrics->pong_result[ 0UL ]++;
358 0 : return;
359 0 : }
360 :
361 30 : fd_ping_peer_t * peer = peer_map_ele_query( ping_tracker->peers, fd_type_pun_const( peer_pubkey ), NULL, ping_tracker->pool );
362 30 : if( FD_UNLIKELY( !peer ) ) {
363 3 : ping_tracker->metrics->pong_result[ 2UL ]++;
364 3 : return;
365 3 : }
366 :
367 27 : if( FD_UNLIKELY( peer_address.addr!=peer->address.addr || peer_address.port!=peer->address.port ) ) {
368 3 : ping_tracker->metrics->pong_result[ 3UL ]++;
369 3 : return;
370 3 : }
371 24 : if( FD_UNLIKELY( memcmp( pong_token, peer->expected_pong_hash, 32UL ) ) ) {
372 3 : ping_tracker->metrics->pong_result[ 4UL ]++;
373 3 : return;
374 3 : }
375 :
376 21 : remove_tracking( ping_tracker, peer );
377 21 : peer->valid_until_nanos = now+20L*60L*1000L*1000L*1000L; /* 20 mintues of validity */
378 21 : peer->next_ping_nanos = now+18L*60L*1000L*1000L*1000L; /* 18 minutes til we start trying to refresh */
379 21 : if( FD_UNLIKELY( peer->state==FD_PING_TRACKER_STATE_INVALID || peer->state==FD_PING_TRACKER_STATE_UNPINGED ) ) {
380 18 : ping_tracker->change_fn( ping_tracker->change_fn_ctx, peer->identity_pubkey.b, peer->address, now, FD_PING_TRACKER_CHANGE_TYPE_ACTIVE );
381 18 : }
382 21 : switch( peer->state ) {
383 0 : case FD_PING_TRACKER_STATE_UNPINGED: ping_tracker->metrics->unpinged_cnt--; break;
384 18 : case FD_PING_TRACKER_STATE_INVALID: ping_tracker->metrics->invalid_cnt--; break;
385 3 : case FD_PING_TRACKER_STATE_VALID: ping_tracker->metrics->valid_cnt--; break;
386 0 : case FD_PING_TRACKER_STATE_VALID_REFRESHING: ping_tracker->metrics->refreshing_cnt--; break;
387 0 : default: FD_LOG_ERR(( "Unknown state %d", peer->state )); return;
388 21 : }
389 21 : peer->state = FD_PING_TRACKER_STATE_VALID;
390 21 : ping_tracker->metrics->valid_cnt++;
391 21 : waiting_list_ele_push_tail( ping_tracker->waiting, peer, ping_tracker->pool );
392 21 : ping_tracker->metrics->pong_result[ 5UL ]++;
393 21 : }
394 :
395 : int
396 : fd_ping_tracker_active( fd_ping_tracker_t * ping_tracker,
397 : uchar const * peer_pubkey,
398 42 : fd_ip4_port_t peer_address ) {
399 42 : if( FD_UNLIKELY( !peer_address.addr ) ) return 0;
400 36 : fd_ping_peer_t * peer = peer_map_ele_query( ping_tracker->peers, fd_type_pun_const( peer_pubkey ), NULL, ping_tracker->pool );
401 36 : if( FD_UNLIKELY( !peer ) ) return 0;
402 21 : return (peer->state==FD_PING_TRACKER_STATE_VALID || peer->state==FD_PING_TRACKER_STATE_VALID_REFRESHING) && peer->address.l==peer_address.l;
403 36 : }
404 :
405 : int
406 : fd_ping_tracker_pop_request( fd_ping_tracker_t * ping_tracker,
407 : long now,
408 : uchar const ** out_peer_pubkey,
409 : fd_ip4_port_t const ** out_peer_address,
410 75183 : uchar const ** out_token ) {
411 75183 : if( FD_UNLIKELY( !unpinged_list_is_empty( ping_tracker->unpinged, ping_tracker->pool ) ) ) {
412 30 : fd_ping_peer_t * unpinged = unpinged_list_ele_pop_head( ping_tracker->unpinged, ping_tracker->pool );
413 30 : FD_TEST( unpinged->state==FD_PING_TRACKER_STATE_UNPINGED );
414 30 : refreshing_list_ele_push_tail( ping_tracker->refreshing, unpinged, ping_tracker->pool );
415 30 : unpinged->state = FD_PING_TRACKER_STATE_INVALID;
416 30 : ping_tracker->metrics->unpinged_cnt--;
417 30 : ping_tracker->metrics->invalid_cnt++;
418 30 : unpinged->next_ping_nanos = now+1L*1000L*1000L*1000L;
419 30 : *out_peer_pubkey = unpinged->identity_pubkey.b;
420 30 : *out_peer_address = &unpinged->address;
421 30 : *out_token = unpinged->ping_token;
422 30 : return 1;
423 30 : }
424 :
425 75159 : for(;;) {
426 75159 : fd_ping_peer_t * peer_refreshing = NULL;
427 75159 : if( FD_UNLIKELY( !refreshing_list_is_empty( ping_tracker->refreshing, ping_tracker->pool ) ) ) peer_refreshing = refreshing_list_ele_peek_head( ping_tracker->refreshing, ping_tracker->pool );
428 75159 : fd_ping_peer_t * peer_waiting = NULL;
429 75159 : if( FD_UNLIKELY( !waiting_list_is_empty( ping_tracker->waiting, ping_tracker->pool ) ) ) peer_waiting = waiting_list_ele_peek_head( ping_tracker->waiting, ping_tracker->pool );
430 :
431 75159 : fd_ping_peer_t * next;
432 75159 : if( FD_UNLIKELY( !peer_refreshing && !peer_waiting ) ) return 0;
433 39 : else if( FD_UNLIKELY( peer_refreshing && !peer_waiting ) ) next = peer_refreshing;
434 6 : else if( FD_UNLIKELY( !peer_refreshing && peer_waiting ) ) next = peer_waiting;
435 0 : else if( FD_UNLIKELY( peer_waiting->next_ping_nanos<peer_refreshing->next_ping_nanos ) ) next = peer_waiting;
436 0 : else next = peer_refreshing;
437 :
438 39 : FD_TEST( next->state!=FD_PING_TRACKER_STATE_UNPINGED );
439 39 : FD_TEST( next->next_ping_nanos );
440 39 : if( FD_LIKELY( next->state!=FD_PING_TRACKER_STATE_INVALID ) ) FD_TEST( next->valid_until_nanos );
441 30 : else FD_TEST( !next->valid_until_nanos );
442 :
443 39 : if( FD_UNLIKELY( next->last_rx_nanos<now-20L*1000L*1000L*1000L ) ) {
444 : /* The peer is no longer sending us contact information, no need
445 : to ping it and instead remove it from the table. */
446 6 : remove_peer( ping_tracker, next, now, FD_PING_TRACKER_CHANGE_TYPE_INACTIVE );
447 6 : continue;
448 6 : }
449 :
450 : /* The next ping we want to send is still in the future, so do
451 : nothing for now. */
452 33 : if( FD_LIKELY( next->next_ping_nanos>now ) ) return 0;
453 :
454 24 : if( FD_LIKELY( next==peer_refreshing ) ) refreshing_list_ele_pop_head( ping_tracker->refreshing, ping_tracker->pool );
455 6 : else if( FD_LIKELY( next==peer_waiting ) ) waiting_list_ele_pop_head( ping_tracker->waiting, ping_tracker->pool );
456 0 : else FD_LOG_CRIT(( "impossible" ));
457 :
458 : /* Push the element to the back of the refreshing list now, so it
459 : starts getting pinged every second. */
460 24 : refreshing_list_ele_push_tail( ping_tracker->refreshing, next, ping_tracker->pool );
461 24 : if( FD_LIKELY( next->state==FD_PING_TRACKER_STATE_VALID ) ) {
462 6 : next->state = FD_PING_TRACKER_STATE_VALID_REFRESHING;
463 6 : ping_tracker->metrics->valid_cnt--;
464 6 : ping_tracker->metrics->refreshing_cnt++;
465 18 : } else if( FD_LIKELY( next->state==FD_PING_TRACKER_STATE_VALID_REFRESHING && next->valid_until_nanos<=now ) ) {
466 3 : ping_tracker->change_fn( ping_tracker->change_fn_ctx, next->identity_pubkey.b, next->address, now, FD_PING_TRACKER_CHANGE_TYPE_INACTIVE );
467 3 : switch( next->state ) {
468 0 : case FD_PING_TRACKER_STATE_UNPINGED: ping_tracker->metrics->unpinged_cnt--; break;
469 0 : case FD_PING_TRACKER_STATE_INVALID: ping_tracker->metrics->invalid_cnt--; break;
470 0 : case FD_PING_TRACKER_STATE_VALID: ping_tracker->metrics->valid_cnt--; break;
471 3 : case FD_PING_TRACKER_STATE_VALID_REFRESHING: ping_tracker->metrics->refreshing_cnt--; break;
472 0 : default: FD_LOG_ERR(( "Unknown state %d", next->state ));
473 3 : }
474 3 : next->state = FD_PING_TRACKER_STATE_INVALID;
475 3 : next->valid_until_nanos = 0L;
476 3 : ping_tracker->metrics->invalid_cnt++;
477 3 : }
478 24 : next->next_ping_nanos = now+1L*1000L*1000L*1000L;
479 24 : *out_peer_pubkey = next->identity_pubkey.b;
480 24 : *out_peer_address = &next->address;
481 24 : *out_token = next->ping_token;
482 24 : return 1;
483 24 : }
484 75153 : }
485 :
486 : void
487 : fd_ping_tracker_remove( fd_ping_tracker_t * ping_tracker,
488 : uchar const * peer_pubkey,
489 21 : long now ) {
490 21 : fd_ping_peer_t * peer = peer_map_ele_query( ping_tracker->peers, fd_type_pun_const( peer_pubkey ), NULL, ping_tracker->pool );
491 21 : if( FD_UNLIKELY( !peer ) ) return;
492 :
493 12 : remove_peer( ping_tracker, peer, now, FD_PING_TRACKER_CHANGE_TYPE_INACTIVE );
494 12 : }
495 :
496 : fd_ping_tracker_metrics_t const *
497 0 : fd_ping_tracker_metrics( fd_ping_tracker_t const * ping_tracker ) {
498 0 : return ping_tracker->metrics;
499 0 : }
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