rns_core/
constants.rs

1// =============================================================================
2// Reticulum protocol constants
3// Ported from Python RNS source
4// =============================================================================
5
6// --- From Reticulum.py ---
7
8/// Maximum transmission unit in bytes
9pub const MTU: usize = 500;
10
11/// Truncated hash length in bits
12pub const TRUNCATED_HASHLENGTH: usize = 128;
13
14/// Minimum header size: 2 (flags + hops) + 1 (context) + 16 (dest hash)
15pub const HEADER_MINSIZE: usize = 2 + 1 + (TRUNCATED_HASHLENGTH / 8);
16
17/// Maximum header size: 2 (flags + hops) + 1 (context) + 32 (transport_id + dest hash)
18pub const HEADER_MAXSIZE: usize = 2 + 1 + (TRUNCATED_HASHLENGTH / 8) * 2;
19
20/// Minimum IFAC size
21pub const IFAC_MIN_SIZE: usize = 1;
22
23/// Maximum data unit: MTU - HEADER_MAXSIZE - IFAC_MIN_SIZE
24pub const MDU: usize = MTU - HEADER_MAXSIZE - IFAC_MIN_SIZE;
25
26// --- From Identity.py ---
27
28/// Full key size in bits (256 X25519 + 256 Ed25519)
29pub const KEYSIZE: usize = 512;
30
31/// Ratchet key size in bits
32pub const RATCHETSIZE: usize = 256;
33
34/// Token overhead in bytes (16 IV + 32 HMAC)
35pub const TOKEN_OVERHEAD: usize = 48;
36
37/// AES-128 block size in bytes
38pub const AES128_BLOCKSIZE: usize = 16;
39
40/// Full hash length in bits (SHA-256)
41pub const HASHLENGTH: usize = 256;
42
43/// Signature length in bits (Ed25519)
44pub const SIGLENGTH: usize = KEYSIZE;
45
46/// Name hash length in bits
47pub const NAME_HASH_LENGTH: usize = 80;
48
49/// Derived key length in bytes
50pub const DERIVED_KEY_LENGTH: usize = 64;
51
52// --- From Packet.py ---
53
54/// Packet types
55pub const PACKET_TYPE_DATA: u8 = 0x00;
56pub const PACKET_TYPE_ANNOUNCE: u8 = 0x01;
57pub const PACKET_TYPE_LINKREQUEST: u8 = 0x02;
58pub const PACKET_TYPE_PROOF: u8 = 0x03;
59
60/// Header types
61pub const HEADER_1: u8 = 0x00;
62pub const HEADER_2: u8 = 0x01;
63
64/// Packet context types
65pub const CONTEXT_NONE: u8 = 0x00;
66pub const CONTEXT_RESOURCE: u8 = 0x01;
67pub const CONTEXT_RESOURCE_ADV: u8 = 0x02;
68pub const CONTEXT_RESOURCE_REQ: u8 = 0x03;
69pub const CONTEXT_RESOURCE_HMU: u8 = 0x04;
70pub const CONTEXT_RESOURCE_PRF: u8 = 0x05;
71pub const CONTEXT_RESOURCE_ICL: u8 = 0x06;
72pub const CONTEXT_RESOURCE_RCL: u8 = 0x07;
73pub const CONTEXT_CACHE_REQUEST: u8 = 0x08;
74pub const CONTEXT_REQUEST: u8 = 0x09;
75pub const CONTEXT_RESPONSE: u8 = 0x0A;
76pub const CONTEXT_PATH_RESPONSE: u8 = 0x0B;
77pub const CONTEXT_COMMAND: u8 = 0x0C;
78pub const CONTEXT_COMMAND_STATUS: u8 = 0x0D;
79pub const CONTEXT_CHANNEL: u8 = 0x0E;
80pub const CONTEXT_KEEPALIVE: u8 = 0xFA;
81pub const CONTEXT_LINKIDENTIFY: u8 = 0xFB;
82pub const CONTEXT_LINKCLOSE: u8 = 0xFC;
83pub const CONTEXT_LINKPROOF: u8 = 0xFD;
84pub const CONTEXT_LRRTT: u8 = 0xFE;
85pub const CONTEXT_LRPROOF: u8 = 0xFF;
86
87/// Context flag values
88pub const FLAG_SET: u8 = 0x01;
89pub const FLAG_UNSET: u8 = 0x00;
90
91/// Encrypted MDU: floor((MDU - TOKEN_OVERHEAD - KEYSIZE/16) / AES128_BLOCKSIZE) * AES128_BLOCKSIZE - 1
92pub const ENCRYPTED_MDU: usize = {
93    let numerator = MDU - TOKEN_OVERHEAD - KEYSIZE / 16;
94    (numerator / AES128_BLOCKSIZE) * AES128_BLOCKSIZE - 1
95};
96
97/// Plain MDU (same as MDU)
98pub const PLAIN_MDU: usize = MDU;
99
100/// Explicit proof length: HASHLENGTH/8 + SIGLENGTH/8 = 32 + 64 = 96
101pub const EXPL_LENGTH: usize = HASHLENGTH / 8 + SIGLENGTH / 8;
102
103/// Implicit proof length: SIGLENGTH/8 = 64
104pub const IMPL_LENGTH: usize = SIGLENGTH / 8;
105
106/// Receipt status constants
107pub const RECEIPT_FAILED: u8 = 0x00;
108pub const RECEIPT_SENT: u8 = 0x01;
109pub const RECEIPT_DELIVERED: u8 = 0x02;
110pub const RECEIPT_CULLED: u8 = 0xFF;
111
112// --- From Destination.py ---
113
114/// Destination types
115pub const DESTINATION_SINGLE: u8 = 0x00;
116pub const DESTINATION_GROUP: u8 = 0x01;
117pub const DESTINATION_PLAIN: u8 = 0x02;
118pub const DESTINATION_LINK: u8 = 0x03;
119
120/// Destination directions
121pub const DESTINATION_IN: u8 = 0x11;
122pub const DESTINATION_OUT: u8 = 0x12;
123
124// --- From Transport.py ---
125
126/// Transport types
127pub const TRANSPORT_BROADCAST: u8 = 0x00;
128pub const TRANSPORT_TRANSPORT: u8 = 0x01;
129pub const TRANSPORT_RELAY: u8 = 0x02;
130pub const TRANSPORT_TUNNEL: u8 = 0x03;
131
132/// Maximum hops
133pub const PATHFINDER_M: u8 = 128;
134
135// --- PATHFINDER algorithm ---
136
137/// Retransmit retries (total sends = PATHFINDER_R + 1)
138pub const PATHFINDER_R: u8 = 1;
139
140/// Grace period between retries (seconds)
141pub const PATHFINDER_G: f64 = 5.0;
142
143/// Random window for announce rebroadcast (seconds)
144pub const PATHFINDER_RW: f64 = 0.5;
145
146/// Path expiry = 7 days (seconds)
147pub const PATHFINDER_E: f64 = 604800.0;
148
149// --- Path expiry by interface mode ---
150
151/// Access Point path expiry = 1 day
152pub const AP_PATH_TIME: f64 = 86400.0;
153
154/// Roaming path expiry = 6 hours
155pub const ROAMING_PATH_TIME: f64 = 21600.0;
156
157// --- Announce bandwidth cap ---
158
159/// Default announce bandwidth cap (2% of interface bandwidth)
160pub const ANNOUNCE_CAP: f64 = 0.02;
161
162/// Maximum queued announces per interface
163pub const MAX_QUEUED_ANNOUNCES: usize = 16384;
164
165/// Queued announce lifetime (24 hours)
166pub const QUEUED_ANNOUNCE_LIFE: f64 = 86400.0;
167
168/// Retention TTL for announce retransmission state (seconds)
169pub const ANNOUNCE_TABLE_TTL: f64 = 30.0;
170
171/// Maximum retained bytes for announce retransmission state
172pub const ANNOUNCE_TABLE_MAX_BYTES: usize = 4 * 1024 * 1024;
173
174// --- Table limits ---
175
176/// How many local rebroadcasts of an announce is allowed
177pub const LOCAL_REBROADCASTS_MAX: u8 = 2;
178
179/// Maximum number of random blobs per destination to keep in memory
180pub const MAX_RANDOM_BLOBS: usize = 64;
181
182/// Maximum number of announce timestamps to keep per destination
183pub const MAX_RATE_TIMESTAMPS: usize = 16;
184
185/// Maximum packet hashlist size before rotation
186pub const HASHLIST_MAXSIZE: usize = 250_000;
187
188/// Maximum announce signature cache entries (dedup verified signatures)
189pub const ANNOUNCE_SIG_CACHE_MAXSIZE: usize = 2_000;
190
191/// TTL for announce signature cache entries (seconds)
192pub const ANNOUNCE_SIG_CACHE_TTL: f64 = 600.0;
193
194// --- Timeouts ---
195
196/// Reverse table entry timeout (8 minutes)
197pub const REVERSE_TIMEOUT: f64 = 480.0;
198
199/// Destination table entry timeout (7 days)
200pub const DESTINATION_TIMEOUT: f64 = 604800.0;
201
202/// Tunnel table entry timeout (8 hours)
203pub const TUNNEL_TIMEOUT: f64 = 28800.0;
204
205/// Tunnel path retention timeout (8 hours)
206pub const TUNNEL_PATH_TIMEOUT: f64 = 28800.0;
207
208/// Link stale time = 2 * KEEPALIVE(360) = 720 seconds
209pub const LINK_STALE_TIME: f64 = 720.0;
210
211/// Link timeout = STALE_TIME * 1.25 = 900 seconds
212pub const LINK_TIMEOUT: f64 = 900.0;
213
214/// Link establishment timeout per hop (seconds)
215pub const LINK_ESTABLISHMENT_TIMEOUT_PER_HOP: f64 = 6.0;
216
217// --- Path request ---
218
219/// Default timeout for path requests (seconds)
220pub const PATH_REQUEST_TIMEOUT: f64 = 15.0;
221
222/// Grace time before a path announcement is made (seconds)
223pub const PATH_REQUEST_GRACE: f64 = 0.4;
224
225/// Extra grace time for roaming-mode interfaces (seconds)
226pub const PATH_REQUEST_RG: f64 = 1.5;
227
228/// Minimum interval for automated path requests (seconds)
229pub const PATH_REQUEST_MI: f64 = 20.0;
230
231/// Maximum amount of unique path request tags to remember
232pub const MAX_PR_TAGS: usize = 32000;
233
234// --- Job intervals ---
235
236/// Announce check interval (seconds)
237pub const ANNOUNCES_CHECK_INTERVAL: f64 = 1.0;
238
239/// Table culling interval (seconds)
240pub const TABLES_CULL_INTERVAL: f64 = 5.0;
241
242/// Link check interval (seconds)
243pub const LINKS_CHECK_INTERVAL: f64 = 1.0;
244
245// --- Ingress Control (from Interface.py) ---
246
247/// Interface "new" period in seconds (2 hours).
248pub const IC_NEW_TIME: f64 = 7200.0;
249/// Announce frequency threshold for new interfaces (announces/sec).
250pub const IC_BURST_FREQ_NEW: f64 = 6.0;
251/// Announce frequency threshold for mature interfaces (announces/sec).
252pub const IC_BURST_FREQ: f64 = 35.0;
253/// Minimum burst active duration in seconds.
254pub const IC_BURST_HOLD: f64 = 60.0;
255/// Penalty delay before releasing held announces (seconds).
256pub const IC_BURST_PENALTY: f64 = 15.0;
257/// Interval between individual held announce releases (seconds).
258pub const IC_HELD_RELEASE_INTERVAL: f64 = 2.0;
259/// Maximum held announces per interface.
260pub const IC_MAX_HELD_ANNOUNCES: usize = 256;
261
262// --- Interface modes (from Interface.py) ---
263
264pub const MODE_FULL: u8 = 0x01;
265pub const MODE_POINT_TO_POINT: u8 = 0x02;
266pub const MODE_ACCESS_POINT: u8 = 0x03;
267pub const MODE_ROAMING: u8 = 0x04;
268pub const MODE_BOUNDARY: u8 = 0x05;
269pub const MODE_GATEWAY: u8 = 0x06;
270
271/// Interface modes that forward path requests for unknown destinations.
272/// Python: Interface.DISCOVER_PATHS_FOR = [MODE_ACCESS_POINT, MODE_GATEWAY, MODE_ROAMING]
273pub const DISCOVER_PATHS_FOR: [u8; 3] = [MODE_ACCESS_POINT, MODE_GATEWAY, MODE_ROAMING];
274
275/// Discovery path request expiry (seconds) — requests older than this are culled.
276pub const DISCOVERY_PATH_REQUEST_TIMEOUT: f64 = 15.0;
277
278// --- Path states ---
279
280pub const STATE_UNKNOWN: u8 = 0x00;
281pub const STATE_UNRESPONSIVE: u8 = 0x01;
282pub const STATE_RESPONSIVE: u8 = 0x02;
283
284// --- From Link.py ---
285
286/// Link ephemeral public key size: 32 (X25519) + 32 (Ed25519)
287pub const LINK_ECPUBSIZE: usize = 64;
288
289/// Link key size in bytes
290pub const LINK_KEYSIZE: usize = 32;
291
292/// Link MTU signalling bytes size
293pub const LINK_MTU_SIZE: usize = 3;
294
295/// Maximum keepalive interval in seconds
296pub const LINK_KEEPALIVE_MAX: f64 = 360.0;
297
298/// Minimum keepalive interval in seconds
299pub const LINK_KEEPALIVE_MIN: f64 = 5.0;
300
301/// Maximum RTT used for keepalive scaling
302pub const LINK_KEEPALIVE_MAX_RTT: f64 = 1.75;
303
304/// RTT timeout factor for stale→close transition
305pub const LINK_KEEPALIVE_TIMEOUT_FACTOR: f64 = 4.0;
306
307/// Grace period for stale→close transition
308pub const LINK_STALE_GRACE: f64 = 5.0;
309
310/// Factor to compute stale_time from keepalive
311pub const LINK_STALE_FACTOR: f64 = 2.0;
312
313/// Traffic timeout factor
314pub const LINK_TRAFFIC_TIMEOUT_FACTOR: f64 = 6.0;
315
316/// Link MDU: floor((MTU - IFAC_MIN_SIZE - HEADER_MINSIZE - TOKEN_OVERHEAD) / AES128_BLOCKSIZE) * AES128_BLOCKSIZE - 1
317pub const LINK_MDU: usize = {
318    let numerator = MTU - IFAC_MIN_SIZE - HEADER_MINSIZE - TOKEN_OVERHEAD;
319    (numerator / AES128_BLOCKSIZE) * AES128_BLOCKSIZE - 1
320};
321
322/// Link MTU bytemask (21-bit MTU field)
323pub const LINK_MTU_BYTEMASK: u32 = 0x1FFFFF;
324
325/// Link mode bytemask (3-bit mode field in upper byte)
326pub const LINK_MODE_BYTEMASK: u8 = 0xE0;
327
328// --- From Channel.py ---
329
330/// Initial window size at channel setup
331pub const CHANNEL_WINDOW: u16 = 2;
332
333/// Absolute minimum window size
334pub const CHANNEL_WINDOW_MIN: u16 = 2;
335
336/// Minimum window limit for slow links
337pub const CHANNEL_WINDOW_MIN_LIMIT_SLOW: u16 = 2;
338
339/// Minimum window limit for medium-speed links
340pub const CHANNEL_WINDOW_MIN_LIMIT_MEDIUM: u16 = 5;
341
342/// Minimum window limit for fast links
343pub const CHANNEL_WINDOW_MIN_LIMIT_FAST: u16 = 16;
344
345/// Maximum window size for slow links
346pub const CHANNEL_WINDOW_MAX_SLOW: u16 = 5;
347
348/// Maximum window size for medium-speed links
349pub const CHANNEL_WINDOW_MAX_MEDIUM: u16 = 12;
350
351/// Maximum window size for fast links
352pub const CHANNEL_WINDOW_MAX_FAST: u16 = 48;
353
354/// Minimum flexibility between window_max and window_min
355pub const CHANNEL_WINDOW_FLEXIBILITY: u16 = 4;
356
357/// Maximum sequence number
358pub const CHANNEL_SEQ_MAX: u16 = 0xFFFF;
359
360/// Sequence number modulus
361pub const CHANNEL_SEQ_MODULUS: u32 = 0x10000;
362
363/// Maximum number of send tries per envelope
364pub const CHANNEL_MAX_TRIES: u8 = 5;
365
366/// RTT threshold for fast links
367pub const CHANNEL_RTT_FAST: f64 = 0.18;
368
369/// RTT threshold for medium links
370pub const CHANNEL_RTT_MEDIUM: f64 = 0.75;
371
372/// RTT threshold for slow links
373pub const CHANNEL_RTT_SLOW: f64 = 1.45;
374
375/// Number of consecutive fast rounds to upgrade window
376pub const CHANNEL_FAST_RATE_THRESHOLD: u16 = 10;
377
378/// Channel envelope overhead: msgtype(2) + seq(2) + len(2)
379pub const CHANNEL_ENVELOPE_OVERHEAD: usize = 6;
380
381// --- From Buffer.py ---
382
383/// System message type for stream data
384pub const STREAM_DATA_MSGTYPE: u16 = 0xFF00;
385
386/// Maximum stream ID (14 bits)
387pub const STREAM_ID_MAX: u16 = 0x3FFF;
388
389/// Stream data overhead: 2 (stream header) + 6 (channel envelope)
390pub const STREAM_DATA_OVERHEAD: usize = 2 + CHANNEL_ENVELOPE_OVERHEAD;
391
392// --- From Resource.py ---
393
394/// Initial window size at beginning of transfer
395pub const RESOURCE_WINDOW: usize = 4;
396
397/// Absolute minimum window size during transfer
398pub const RESOURCE_WINDOW_MIN: usize = 2;
399
400/// Maximum window size for slow links
401pub const RESOURCE_WINDOW_MAX_SLOW: usize = 10;
402
403/// Maximum window size for very slow links
404pub const RESOURCE_WINDOW_MAX_VERY_SLOW: usize = 4;
405
406/// Maximum window size for fast links
407pub const RESOURCE_WINDOW_MAX_FAST: usize = 75;
408
409/// Global maximum window (for calculations)
410pub const RESOURCE_WINDOW_MAX: usize = RESOURCE_WINDOW_MAX_FAST;
411
412/// Minimum flexibility between window_max and window_min
413pub const RESOURCE_WINDOW_FLEXIBILITY: usize = 4;
414
415/// Sustained fast-rate rounds before enabling fast window
416/// = WINDOW_MAX_SLOW - WINDOW - 2 = 10 - 4 - 2 = 4
417pub const RESOURCE_FAST_RATE_THRESHOLD: usize = RESOURCE_WINDOW_MAX_SLOW - RESOURCE_WINDOW - 2;
418
419/// Sustained very-slow-rate rounds before capping to very slow
420pub const RESOURCE_VERY_SLOW_RATE_THRESHOLD: usize = 2;
421
422/// Fast rate threshold: 50 Kbps in bytes/sec = 50000 / 8 = 6250.0
423pub const RESOURCE_RATE_FAST: f64 = (50 * 1000) as f64 / 8.0;
424
425/// Very slow rate threshold: 2 Kbps in bytes/sec = 2000 / 8 = 250.0
426pub const RESOURCE_RATE_VERY_SLOW: f64 = (2 * 1000) as f64 / 8.0;
427
428/// Number of bytes in a map hash
429pub const RESOURCE_MAPHASH_LEN: usize = 4;
430
431/// Resource SDU = Packet.MDU (NOT ENCRYPTED_MDU)
432pub const RESOURCE_SDU: usize = MDU;
433
434/// Random hash size prepended to resource data
435pub const RESOURCE_RANDOM_HASH_SIZE: usize = 4;
436
437/// Maximum efficient resource size (1 MB - 1)
438pub const RESOURCE_MAX_EFFICIENT_SIZE: usize = 1024 * 1024 - 1;
439
440/// Maximum metadata size (16 MB - 1)
441pub const RESOURCE_METADATA_MAX_SIZE: usize = 16 * 1024 * 1024 - 1;
442
443/// Maximum auto-compress size (64 MB)
444pub const RESOURCE_AUTO_COMPRESS_MAX_SIZE: usize = 64 * 1024 * 1024;
445
446/// Part timeout factor (before RTT measured)
447pub const RESOURCE_PART_TIMEOUT_FACTOR: f64 = 4.0;
448
449/// Part timeout factor (after first RTT measured)
450pub const RESOURCE_PART_TIMEOUT_FACTOR_AFTER_RTT: f64 = 2.0;
451
452/// Proof timeout factor (reduced when awaiting proof)
453pub const RESOURCE_PROOF_TIMEOUT_FACTOR: f64 = 3.0;
454
455/// Maximum retries for part transfers
456pub const RESOURCE_MAX_RETRIES: usize = 16;
457
458/// Maximum retries for advertisement
459pub const RESOURCE_MAX_ADV_RETRIES: usize = 4;
460
461/// Sender grace time (seconds)
462pub const RESOURCE_SENDER_GRACE_TIME: f64 = 10.0;
463
464/// Processing grace for advertisement response (seconds)
465pub const RESOURCE_PROCESSING_GRACE: f64 = 1.0;
466
467/// Retry grace time (seconds)
468pub const RESOURCE_RETRY_GRACE_TIME: f64 = 0.25;
469
470/// Per-retry delay (seconds)
471pub const RESOURCE_PER_RETRY_DELAY: f64 = 0.5;
472
473/// Maximum watchdog sleep interval (seconds)
474pub const RESOURCE_WATCHDOG_MAX_SLEEP: f64 = 1.0;
475
476/// Response max grace time (seconds)
477pub const RESOURCE_RESPONSE_MAX_GRACE_TIME: f64 = 10.0;
478
479/// Advertisement overhead in bytes (fixed msgpack overhead)
480pub const RESOURCE_ADVERTISEMENT_OVERHEAD: usize = 134;
481
482/// Maximum hashmap entries per advertisement segment
483/// = floor((LINK_MDU - ADVERTISEMENT_OVERHEAD) / MAPHASH_LEN)
484pub const RESOURCE_HASHMAP_MAX_LEN: usize =
485    (LINK_MDU - RESOURCE_ADVERTISEMENT_OVERHEAD) / RESOURCE_MAPHASH_LEN;
486
487/// Collision guard size = 2 * WINDOW_MAX + HASHMAP_MAX_LEN
488pub const RESOURCE_COLLISION_GUARD_SIZE: usize = 2 * RESOURCE_WINDOW_MAX + RESOURCE_HASHMAP_MAX_LEN;
489
490/// Hashmap not exhausted flag
491pub const RESOURCE_HASHMAP_IS_NOT_EXHAUSTED: u8 = 0x00;
492
493/// Hashmap exhausted flag
494pub const RESOURCE_HASHMAP_IS_EXHAUSTED: u8 = 0xFF;
495
496#[cfg(test)]
497mod tests {
498    use super::*;
499
500    #[test]
501    fn test_derived_constants() {
502        // MTU = 500
503        assert_eq!(MTU, 500);
504
505        // HEADER_MINSIZE = 2 + 1 + 16 = 19
506        assert_eq!(HEADER_MINSIZE, 19);
507
508        // HEADER_MAXSIZE = 2 + 1 + 32 = 35
509        assert_eq!(HEADER_MAXSIZE, 35);
510
511        // MDU = 500 - 35 - 1 = 464
512        assert_eq!(MDU, 464);
513
514        // ENCRYPTED_MDU = floor((464 - 48 - 32) / 16) * 16 - 1 = floor(384/16)*16 - 1 = 24*16 - 1 = 383
515        assert_eq!(ENCRYPTED_MDU, 383);
516
517        // PLAIN_MDU = MDU = 464
518        assert_eq!(PLAIN_MDU, 464);
519
520        // EXPL_LENGTH = 32 + 64 = 96
521        assert_eq!(EXPL_LENGTH, 96);
522
523        // IMPL_LENGTH = 64
524        assert_eq!(IMPL_LENGTH, 64);
525
526        // NAME_HASH_LENGTH = 80 bits = 10 bytes
527        assert_eq!(NAME_HASH_LENGTH / 8, 10);
528
529        // KEYSIZE = 512 bits = 64 bytes
530        assert_eq!(KEYSIZE / 8, 64);
531
532        // SIGLENGTH = 512 bits = 64 bytes
533        assert_eq!(SIGLENGTH / 8, 64);
534
535        // TRUNCATED_HASHLENGTH = 128 bits = 16 bytes
536        assert_eq!(TRUNCATED_HASHLENGTH / 8, 16);
537    }
538
539    #[test]
540    fn test_link_constants() {
541        assert_eq!(LINK_ECPUBSIZE, 64);
542        assert_eq!(LINK_MTU_SIZE, 3);
543        // LINK_MDU = floor((500 - 1 - 19 - 48) / 16) * 16 - 1 = floor(432/16)*16 - 1 = 27*16 - 1 = 431
544        assert_eq!(LINK_MDU, 431);
545        assert_eq!(CHANNEL_ENVELOPE_OVERHEAD, 6);
546        assert_eq!(STREAM_DATA_OVERHEAD, 8);
547        assert_eq!(STREAM_ID_MAX, 0x3FFF);
548    }
549
550    #[test]
551    fn test_transport_constants() {
552        // PATHFINDER_E = 7 days in seconds
553        assert_eq!(PATHFINDER_E, 60.0 * 60.0 * 24.0 * 7.0);
554
555        // AP_PATH_TIME = 1 day
556        assert_eq!(AP_PATH_TIME, 60.0 * 60.0 * 24.0);
557
558        // ROAMING_PATH_TIME = 6 hours
559        assert_eq!(ROAMING_PATH_TIME, 60.0 * 60.0 * 6.0);
560
561        // LINK_STALE_TIME = 2 * 360
562        assert_eq!(LINK_STALE_TIME, 720.0);
563
564        // LINK_TIMEOUT = STALE_TIME * 1.25
565        assert_eq!(LINK_TIMEOUT, LINK_STALE_TIME * 1.25);
566
567        // REVERSE_TIMEOUT = 8 minutes
568        assert_eq!(REVERSE_TIMEOUT, 8.0 * 60.0);
569
570        // DESTINATION_TIMEOUT = 7 days
571        assert_eq!(DESTINATION_TIMEOUT, 60.0 * 60.0 * 24.0 * 7.0);
572    }
573
574    #[test]
575    fn test_resource_constants() {
576        // SDU = MDU = 464 (NOT ENCRYPTED_MDU)
577        assert_eq!(RESOURCE_SDU, 464);
578        assert_eq!(RESOURCE_SDU, MDU);
579
580        // FAST_RATE_THRESHOLD = WINDOW_MAX_SLOW - WINDOW - 2 = 10 - 4 - 2 = 4
581        assert_eq!(RESOURCE_FAST_RATE_THRESHOLD, 4);
582
583        // RATE_FAST = 50000 / 8 = 6250.0
584        assert_eq!(RESOURCE_RATE_FAST, 6250.0);
585
586        // RATE_VERY_SLOW = 2000 / 8 = 250.0
587        assert_eq!(RESOURCE_RATE_VERY_SLOW, 250.0);
588
589        // HASHMAP_MAX_LEN = floor((431 - 134) / 4) = floor(297/4) = 74
590        assert_eq!(RESOURCE_HASHMAP_MAX_LEN, 74);
591
592        // COLLISION_GUARD_SIZE = 2 * 75 + 74 = 224
593        assert_eq!(RESOURCE_COLLISION_GUARD_SIZE, 224);
594
595        // Window constants
596        assert_eq!(RESOURCE_WINDOW, 4);
597        assert_eq!(RESOURCE_WINDOW_MIN, 2);
598        assert_eq!(RESOURCE_WINDOW_MAX_SLOW, 10);
599        assert_eq!(RESOURCE_WINDOW_MAX_VERY_SLOW, 4);
600        assert_eq!(RESOURCE_WINDOW_MAX_FAST, 75);
601        assert_eq!(RESOURCE_WINDOW_MAX, 75);
602        assert_eq!(RESOURCE_WINDOW_FLEXIBILITY, 4);
603    }
604}
rns_core/constants.rs

rns_core/
constants.rs
