nx_link_sentinel.nx source
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1// nx_link_sentinel.nx -- LINK LIVENESS MONITOR for the nav. Probes every surface in knowledge/site/surfaces.reg
2// over the sovereign TLS stack (nx_https_fetch_follow + Mozilla trust store -- the public-edge path a real browser
3// takes), classifies each LIVE/GATED/REDIRECT/DEAD, and keeps a HEALTH LEDGER over time (last-live epoch + fail
4// streak) so no nav link is ever a SILENT orphan. A link stays ACTIVE while reachable; a dead public link becomes
5// DEGRADED (flagged, still shown) then an ARCHIVE candidate after N consecutive fails -- removal stays deliberate
6// (surfaces.reg status=archived). Modes: gate (console+update ledger) | json | html (dashboard). Ledger file:
7// knowledge/site/link_health.tsv (route \t last_status \t class \t last_live_unix \t fail_streak \t checked_unix).
8// nx_cc traps honored (no '#'/'!' in literals; classes not ids; w2 ' -> "). license_tier: ORIGINAL expect_exit:0
9import "nx_syscalls.nx"
10import "nx_connect.nx" // bounded connect: a raw sys_connect hangs ~127s on a black-holed host
11import "nx_csprng.nx"
12import "nx_x509_trust_store.nx"
13import "nx_trust_store_load_from_certdata.nx"
14import "nx_https_fetch_follow.nx"
15const ARCHIVE_MAGIC_65535: i64 = 65535
16const ARCHIVE_MAGIC_4194304: i64 = 4194304
17const ARCHIVE_MAGIC_65536: i64 = 65536
18const ARCHIVE_MAGIC_1048576: i64 = 1048576
19const ARCHIVE_MAGIC_8388608: i64 = 8388608
20const ARCHIVE_MAGIC_1024: i64 = 1024
21
22const HOST: *u8 = "https://nishifamily.com" as *u8
23const ARCHIVE_THRESHOLD: i64 = 6 // consecutive fails before a dead link becomes an archive candidate
24
25func w(fd: i64, s: *u8) -> i64 { var n: i64 = 0; while s[n] != (0 as u8) { n = n + 1 } sys_write(fd, s, n); return 0 }
26func wc(fd: i64, code: i64) -> i64 { let t: *u8 = sys_mmap(2); t[0] = code as u8; sys_write(fd, t, 1); return 0 }
27func wn(fd: i64, v: i64) -> i64 {
28 var m: i64 = v; if m < 0 { w(fd, "-" as *u8); m = 0 - m }
29 let t: *u8 = sys_mmap(24); var k: i64 = 0; if m == 0 { t[0] = 48 as u8; k = 1 }
30 while m > 0 { t[k] = (48 + (m % 10)) as u8; m = m / 10; k = k + 1 }
31 let o: *u8 = sys_mmap(24); var i: i64 = 0; while i < k { o[i] = t[k-1-i]; i = i + 1 } sys_write(fd, o, k); return 0
32}
33func lsent_streq(a: *u8, b: *u8) -> i64 { var i: i64 = 0; while a[i] != (0 as u8) { if a[i] != b[i] { return 0 } i = i + 1 } if b[i] != (0 as u8) { return 0 } return 1 }
34func c_read(path: *u8, buf: *u8, cap: i64) -> i64 {
35 let fd: i64 = sys_openat_rd(path); if fd < 0 { return 0 - 1 }
36 var tot: i64 = 0
37 while tot < cap { let r: i64 = sys_read(fd, (buf as i64 + tot) as *u8, cap - tot); if r <= 0 { break } tot = tot + r }
38 sys_close(fd); return tot
39}
40func scopy(dst: *u8, doff: i64, src: *u8) -> i64 { var i: i64 = 0; while src[i] != (0 as u8) { dst[doff+i] = src[i]; i = i + 1 } return doff + i }
41// encode integer v as decimal into buf at off; return new off
42func enc_int(buf: *u8, off: i64, v: i64) -> i64 {
43 var m: i64 = v; if m < 0 { buf[off] = 45 as u8; off = off + 1; m = 0 - m }
44 if m == 0 { buf[off] = 48 as u8; return off + 1 }
45 let t: *u8 = sys_mmap(24); var k: i64 = 0
46 while m > 0 { t[k] = (48 + (m % 10)) as u8; m = m / 10; k = k + 1 }
47 var j: i64 = k - 1
48 while j >= 0 { buf[off] = t[j]; off = off + 1; j = j - 1 }
49 return off
50}
51func w2(fd: i64, s: *u8) -> i64 { var i: i64 = 0; while s[i] != (0 as u8) { if (s[i] as i64) == 39 { wc(fd, 34) } else { wc(fd, s[i] as i64) } i = i + 1 } return 0 }
52// extract |-delimited field idx from buf[ls,le) into out, trimming spaces
53func field(buf: *u8, ls: i64, le: i64, idx: i64, out: *u8) -> i64 {
54 var cur: i64 = 0; var s: i64 = ls; var i: i64 = ls
55 while i < le { if cur == idx { break } if buf[i] == (124 as u8) { cur = cur + 1; s = i + 1 } i = i + 1 }
56 if cur < idx { out[0] = 0 as u8; return 0 }
57 var e: i64 = s
58 while e < le { if buf[e] == (124 as u8) { break } e = e + 1 }
59 var a: i64 = s
60 while a < e { if buf[a] != (32 as u8) { break } a = a + 1 }
61 var b: i64 = e
62 while b > a { if buf[b-1] != (32 as u8) { break } b = b - 1 }
63 var o: i64 = 0
64 while a < b { out[o] = buf[a]; o = o + 1; a = a + 1 }
65 out[o] = 0 as u8
66 return o
67}
68// class: 0=DEAD 1=LIVE 2=GATED 3=REDIRECT. Scope-aware caller decides health.
69func classify(st: i64) -> i64 {
70 if st >= 200 { if st < 300 { return 1 } }
71 if st == 301 { return 3 }
72 if st == 302 { return 3 }
73 if st == 303 { return 3 }
74 if st == 307 { return 3 }
75 if st == 308 { return 3 }
76 if st == 401 { return 2 }
77 if st == 403 { return 2 }
78 return 0
79}
80func class_name(c: i64) -> *u8 {
81 if c == 1 { return "LIVE" as *u8 }
82 if c == 2 { return "GATED" as *u8 }
83 if c == 3 { return "REDIRECT" as *u8 }
84 return "DEAD" as *u8
85}
86// health: 1 = reachable/expected, 0 = broken. Gated scope treats GATED/LIVE/REDIRECT as healthy.
87func is_healthy(cls: i64, scope_gated: i64) -> i64 {
88 if cls == 1 { return 1 }
89 if cls == 3 { return 1 }
90 if cls == 2 { if scope_gated == 1 { return 1 } return 0 }
91 return 0
92}
93// parse a decimal integer from a null-terminated slice
94func lsent_atoi(s: *u8) -> i64 { var v: i64 = 0; var i: i64 = 0; while s[i] != (0 as u8) { let c: i64 = s[i] as i64; if c >= 48 { if c <= 57 { v = v * 10 + (c - 48) } } i = i + 1 } return v }
95// tab-field extract from ledger line [ls,le) idx -> out
96func tfield(buf: *u8, ls: i64, le: i64, idx: i64, out: *u8) -> i64 {
97 var cur: i64 = 0; var s: i64 = ls; var i: i64 = ls
98 while i < le { if cur == idx { break } if buf[i] == (9 as u8) { cur = cur + 1; s = i + 1 } i = i + 1 }
99 if cur < idx { out[0] = 0 as u8; return 0 }
100 var e: i64 = s
101 while e < le { if buf[e] == (9 as u8) { break } e = e + 1 }
102 var o: i64 = 0; while s < e { out[o] = buf[s]; o = o + 1; s = s + 1 } out[o] = 0 as u8; return o
103}
104// parse "a.b.c.d:port" -> big-endian packed ip + port. 1 ok / 0 bad. (nx_https_get_cli pattern)
105func sent_parse_ipport(s: *u8, ip_out: *i64, port_out: *i64) -> i64 {
106 var packed: i64 = 0; var val: i64 = 0; var nocts: i64 = 0; var port: i64 = 0; var indots: i64 = 1; var i: i64 = 0
107 while s[i] != (0 as u8) {
108 let c: i64 = s[i] as i64
109 if indots == 1 {
110 if c == 46 { packed = (packed << 8) | (val & 0xff); nocts = nocts + 1; val = 0 }
111 else { if c == 58 { packed = (packed << 8) | (val & 0xff); nocts = nocts + 1; val = 0; indots = 0 }
112 else { if c < 48 { return 0 } if c > 57 { return 0 } val = val * 10 + (c - 48) } }
113 } else {
114 if c < 48 { return 0 }
115 if c > 57 { return 0 }
116 port = port * 10 + (c - 48)
117 }
118 i = i + 1
119 }
120 if indots == 1 { return 0 }
121 if nocts != 4 { return 0 }
122 if port <= 0 { return 0 }
123 if port > ARCHIVE_MAGIC_65535 { return 0 }
124 ip_out[0] = packed; port_out[0] = port
125 return 1
126}
127// CONNECT-OVERRIDE fetch (curl --connect-to): TCP+TLS to ip:port while SNI + Host + cert-name stay the URL's
128// host. THE NAS-side probe path -- from the NAS, DNS-resolving our own domain lands on the DSM-nginx :443
129// coin-flip; the override goes straight to the sovereign edge (127.0.0.1:8443). Status -> stbox[0]; body -> out.
130// Returns body length or negative. Redirects are NOT followed (a 3xx classifies healthy anyway).
131func sent_fetch_via(url: *u8, ovip: i64, ovport: i64, store: *TrustStore, out: *u8, out_cap: i64, stbox: *i64) -> i64 {
132 stbox[0] = 0
133 let now: i64 = sys_now_realtime_sec()
134 let url_p: *NxUrl = nx_url_new()
135 let target_raw: *u8 = sys_mmap(32)
136 let target: *NxHttpsTarget = target_raw as *NxHttpsTarget
137 target.url = url_p; target.port = 0
138 if nx_https_url_for_fetch(url, target) != NX_HTTPS_URL_OK { return 0 - 1 }
139 let sa: *u8 = sys_mmap(16)
140 nx_https_build_sockaddr(sa, ovip, ovport)
141 let fd: i64 = sys_socket(NX_HTTPS_AF_INET, NX_HTTPS_SOCK_STREAM, 0)
142 if fd < 0 { return 0 - 2 }
143 sys_set_socket_timeout(fd, 20)
144 if nx_connect_bounded(fd, sa, 16, NX_CONN_DEFAULT_MS) < 0 { sys_close(fd); return 0 - 3 }
145 let cr: *u8 = sys_mmap(32); nx_csprng_fill(cr, 32)
146 let priv: *u8 = sys_mmap(32); nx_csprng_fill(priv, 32)
147 let val_raw: *u8 = sys_mmap(64)
148 let vc: *TlsValidationContext = val_raw as *TlsValidationContext
149 vc.store = store
150 vc.sni_host = url + target.url.host_off
151 vc.sni_host_len = target.url.host_len
152 vc.now_epoch = now
153 let sr: i64 = nx_tls13_client_session_run(fd, url + target.url.host_off, target.url.host_len, cr, priv, vc)
154 if sr < 0 { sys_close(fd); return 0 - 4 }
155 let session: *Tls13ClientSession = sr as *Tls13ClientSession
156 var path_ptr: *u8 = url + target.url.path_off
157 var path_len: i64 = target.url.path_len
158 if path_len == 0 { let dp: *u8 = sys_mmap(2); dp[0] = 47 as u8; path_ptr = dp; path_len = 1 }
159 let n: i64 = nx_https_get_complete(session, fd, path_ptr, path_len, url + target.url.host_off, target.url.host_len, out, out_cap)
160 sys_close(fd)
161 if n < 0 { return n }
162 // parse "HTTP/1.x NNN"
163 var st: i64 = 0
164 if n >= 12 { var k: i64 = 9; while k < 12 { let c: i64 = out[k] as i64; if c >= 48 { if c <= 57 { st = st * 10 + (c - 48) } } k = k + 1 } }
165 stbox[0] = st
166 return n
167}
168// look up prior ledger for `route` -> writes last_live to llbox[0], fail_streak to fsbox[0]. Returns 1 if found.
169func ledger_lookup(led: *u8, ln: i64, route: *u8, llbox: *i64, fsbox: *i64) -> i64 {
170 let rb: *u8 = sys_mmap(512); let vb: *u8 = sys_mmap(64)
171 var i: i64 = 0
172 while i < ln {
173 var j: i64 = i
174 while j < ln { if led[j] == (10 as u8) { break } j = j + 1 }
175 if j > i {
176 tfield(led, i, j, 0, rb)
177 if lsent_streq(rb, route) == 1 {
178 tfield(led, i, j, 3, vb); llbox[0] = lsent_atoi(vb)
179 tfield(led, i, j, 4, vb); fsbox[0] = lsent_atoi(vb)
180 return 1
181 }
182 }
183 i = j + 1
184 }
185 llbox[0] = 0; fsbox[0] = 0; return 0
186}
187
188func main(argc: i64, argv: *i64) -> i64 {
189 var mode: i64 = 0
190 if argc >= 2 {
191 if lsent_streq(argv[1] as *u8, "json" as *u8) == 1 { mode = 1 }
192 if lsent_streq(argv[1] as *u8, "html" as *u8) == 1 { mode = 2 }
193 }
194 // optional argv[2] = connect-override "a.b.c.d:port" (NAS-side probing via the loopback sovereign edge)
195 var ovip: i64 = 0
196 var ovport: i64 = 0
197 if argc >= 3 {
198 let ipb: *i64 = sys_mmap(8) as *i64
199 let ptb: *i64 = sys_mmap(8) as *i64
200 if sent_parse_ipport(argv[2] as *u8, ipb, ptb) == 1 { ovip = ipb[0]; ovport = ptb[0] }
201 }
202 // trust store (public-edge TLS)
203 let r: i64 = nx_trust_store_load_from_certdata("data/mozilla_certdata.txt" as *u8, 512, ARCHIVE_MAGIC_4194304)
204 if r <= 0 { w(2, "SENTINEL: trust store load FAIL (need data/mozilla_certdata.txt in cwd)\n" as *u8); sys_exit(2); return 2 }
205 let store: *TrustStore = r as *TrustStore
206
207 let cap: i64 = ARCHIVE_MAGIC_65536
208 let sbuf: *u8 = sys_mmap(cap)
209 var sn: i64 = c_read("knowledge/site/surfaces.reg" as *u8, sbuf, cap)
210 if sn <= 0 { sn = c_read("surfaces.reg" as *u8, sbuf, cap) }
211 // prior ledger (may be absent on first run); dual-path: repo layout, else CWD (NAS: knowledge/ is root-owned)
212 let led: *u8 = sys_mmap(cap)
213 var ln: i64 = c_read("knowledge/site/link_health.tsv" as *u8, led, cap)
214 if ln <= 0 { ln = c_read("link_health.tsv" as *u8, led, cap) }
215 if ln < 0 { ln = 0 }
216
217 let now: i64 = sys_now_realtime_sec()
218 let out: *u8 = sys_mmap(ARCHIVE_MAGIC_1048576)
219 // big-body retry window: a surface whose body exceeds the probe buffer (e.g. a 4.4MB static page)
220 // must NOT read as DEAD -- hoisted once (no mmap in the probe loop), used only on a failed first probe.
221 let bigcap: i64 = ARCHIVE_MAGIC_8388608
222 let bigout: *u8 = sys_mmap(bigcap)
223 let stbox: *i64 = sys_mmap(8) as *i64
224 let route: *u8 = sys_mmap(512); let title: *u8 = sys_mmap(256); let section: *u8 = sys_mmap(256)
225 let scope: *u8 = sys_mmap(64); let url: *u8 = sys_mmap(ARCHIVE_MAGIC_1024)
226 let probeb: *u8 = sys_mmap(ARCHIVE_MAGIC_1024)
227 let llbox: *i64 = sys_mmap(8) as *i64; let fsbox: *i64 = sys_mmap(8) as *i64
228 // freshly built ledger accumulates here
229 let nled: *u8 = sys_mmap(cap); var nlo: i64 = 0
230
231 // counters
232 var total: i64 = 0; var healthy: i64 = 0; var dead: i64 = 0; var degraded: i64 = 0; var archcand: i64 = 0
233
234 // ★ CANARY (false-alarm guard): probe an always-up anchor (/compare = a static docroot page, served iff the
235 // edge is up) BEFORE any stdout write or ledger touch. If it is unreachable, EVERY surface would read "down"
236 // -- that is a MONITORING BLINDSPOT (the edge/probe-path bounced, e.g. an every-minute reconcile cron
237 // restarting sites.elf mid-probe), NOT a mass outage. Publishing all-down is a false alarm, so ABORT: emit
238 // nothing, do NOT rewrite the ledger, exit 3 -> the caller keeps the last-good dashboard.
239 let canurl: *u8 = sys_mmap(256)
240 var cuo: i64 = scopy(canurl, 0, HOST); cuo = scopy(canurl, cuo, "/compare" as *u8); canurl[cuo] = 0 as u8
241 stbox[0] = 0
242 var cgot: i64 = 0
243 if ovport > 0 { cgot = sent_fetch_via(canurl, ovip, ovport, store, out, cap, stbox) } else { cgot = nx_https_fetch_follow(canurl, store, out, cap, 6, stbox) }
244 var canst: i64 = stbox[0]
245 if cgot < 0 { canst = 0 }
246 if canst < 200 { w(2, "SENTINEL: canary /compare unreachable (status=" as *u8); wn(2, canst); w(2, ") -- edge/probe-path down, ABORT (last-good kept)\n" as *u8); sys_exit(3); return 3 }
247
248 // fd for emit: console (gate) prints as we go; json/html buffer via a second pass would need storage,
249 // so we PROBE once and emit inline into the chosen format, accumulating counts + the ledger.
250 if mode == 2 {
251 w2(1, "<" as *u8); wc(1, 33); w2(1, "DOCTYPE html>\n<html lang='en'><head><meta charset='utf-8'><meta name='viewport' content='width=device-width, initial-scale=1'>\n" as *u8)
252 w2(1, "<title>Link Health — Nishi nav sentinel</title>\n<style>\n" as *u8)
253 w2(1, ":root{--bg:rgb(252,252,254);--fg:rgb(22,22,34);--ac:rgb(42,77,143);--line:rgb(228,228,236);--soft:rgb(246,247,251);--mut:rgb(104,104,118);--ok:rgb(26,127,55);--warn:rgb(178,106,0);--bad:rgb(179,38,30)}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--fg);font-family:-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.55}main{max-width:920px;margin:0 auto;padding:0 clamp(16px,5vw,26px) 8vh}\n" as *u8)
254 w2(1, ".hero h1{font-size:clamp(1.7rem,5vw,2.2rem);margin:22px 0 4px}.hero p{color:var(--mut);margin:0 0 12px}.tot{display:flex;gap:10px;flex-wrap:wrap;margin:14px 0 22px}.tot span{padding:7px 13px;border-radius:20px;font-weight:700;font-size:.85rem;border:1px solid var(--line);background:var(--soft)}\n" as *u8)
255 w2(1, "table{width:100%;border-collapse:collapse;font-size:.9rem}th,td{text-align:left;padding:9px 10px;border-bottom:1px solid var(--line)}th{font-size:.72rem;text-transform:uppercase;letter-spacing:.06em;color:var(--mut)}tr:hover td{background:var(--soft)}a{color:var(--ac);text-decoration:none}a:hover{text-decoration:underline}\n" as *u8)
256 w2(1, ".b{font-weight:700;font-size:.7rem;padding:2px 9px;border-radius:20px;color:rgb(255,255,255)}.b.live{background:var(--ok)}.b.gated{background:var(--ac)}.b.redir{background:var(--warn)}.b.dead{background:var(--bad)}.foot{margin-top:26px;color:var(--mut);font-size:.78rem;border-top:1px solid var(--line);padding-top:12px}\n" as *u8)
257 w2(1, "@media(prefers-color-scheme:dark){:root{--bg:rgb(14,14,19);--fg:rgb(231,231,239);--line:rgb(38,38,48);--soft:rgb(22,22,30);--mut:rgb(156,156,168)}}\n</style></head><body><main>\n" as *u8)
258 w2(1, "<div class='hero'><h1>Link Health</h1><p>Every navigation link, probed live over the sovereign TLS edge. No orphans — a dead link is flagged here, never silently dropped.</p></div>\n" as *u8)
259 }
260 if mode == 1 { w2(1, "{'api':'nishi-link-health','generated_unix':" as *u8); wn(1, now); w2(1, ",'links':[" as *u8) }
261 if mode == 0 { w(1, "=== NX-LINK-SENTINEL -- nav link liveness ===\n" as *u8) }
262
263 // rows accumulate for html so we can put the summary badges before the table? We stream table rows after
264 // the head above; the summary line is emitted at the end (json/gate) or via a trailing note (html).
265 if mode == 2 { w2(1, "<table><thead><tr><th>Surface</th><th>Route</th><th>Status</th><th>Health</th><th>Fail streak</th></tr></thead><tbody>\n" as *u8) }
266
267 var jfirst: i64 = 1
268 var i: i64 = 0
269 while i < sn {
270 var j: i64 = i
271 while j < sn { if sbuf[j] == (10 as u8) { break } j = j + 1 }
272 if sbuf[i] != (35 as u8) { if j > i {
273 field(sbuf, i, j, 0, route)
274 if route[0] != (0 as u8) {
275 field(sbuf, i, j, 2, title); field(sbuf, i, j, 1, section); field(sbuf, i, j, 4, scope)
276 let sg: i64 = lsent_streq(scope, "gated" as *u8)
277 let sm: i64 = lsent_streq(scope, "machine" as *u8)
278 // build url = HOST + (probe-override field 7 if present, else route). Machine endpoints whose
279 // bare route is only a 404 guard are probed at their REAL function path (honest liveness).
280 field(sbuf, i, j, 7, probeb)
281 var uo: i64 = scopy(url, 0, HOST)
282 if probeb[0] != (0 as u8) { uo = scopy(url, uo, probeb) } else { uo = scopy(url, uo, route) }
283 url[uo] = 0 as u8
284 // probe (override -> straight to the sovereign edge; else public DNS path)
285 stbox[0] = 0
286 var got: i64 = 0
287 if ovport > 0 { got = sent_fetch_via(url, ovip, ovport, store, out, cap, stbox) } else { got = nx_https_fetch_follow(url, store, out, cap, 6, stbox) }
288 var st: i64 = stbox[0]
289 if got < 0 { st = 0 }
290 // failed first probe -> ONE retry with the 8MB window before any DEAD verdict
291 if st == 0 {
292 stbox[0] = 0
293 var got2: i64 = 0
294 if ovport > 0 { got2 = sent_fetch_via(url, ovip, ovport, store, bigout, bigcap, stbox) } else { got2 = nx_https_fetch_follow(url, store, bigout, bigcap, 6, stbox) }
295 st = stbox[0]
296 if got2 < 0 { st = 0 }
297 }
298 let cls: i64 = classify(st)
299 var hh: i64 = is_healthy(cls, sg)
300 // machine scope (API endpoint, not a browsable page): ANY real HTTP answer = alive
301 if sm == 1 { hh = 0; if st >= 100 { if st < 500 { hh = 1 } } }
302 // class label: machine endpoints answering (even 404) are "API", never DEAD/REDIRECT
303 var clabel: *u8 = class_name(cls)
304 if sm == 1 { if hh == 1 { clabel = "API" as *u8 } }
305 // ledger update
306 ledger_lookup(led, ln, route, llbox, fsbox)
307 var last_live: i64 = llbox[0]
308 var streak: i64 = fsbox[0]
309 if hh == 1 { last_live = now; streak = 0 } else { streak = streak + 1 }
310 total = total + 1
311 if hh == 1 { healthy = healthy + 1 } else { dead = dead + 1; if streak >= ARCHIVE_THRESHOLD { archcand = archcand + 1 } else { degraded = degraded + 1 } }
312 // append to new ledger: route \t class \t status \t last_live \t streak \t now \n
313 nlo = scopy(nled, nlo, route); nled[nlo] = 9 as u8; nlo = nlo + 1
314 nlo = scopy(nled, nlo, clabel); nled[nlo] = 9 as u8; nlo = nlo + 1
315 // status + last_live + streak + now as decimals -- reuse wn into buffer? write direct via small ints
316 // (encode numbers into nled)
317 nlo = enc_int(nled, nlo, st); nled[nlo] = 9 as u8; nlo = nlo + 1
318 nlo = enc_int(nled, nlo, last_live); nled[nlo] = 9 as u8; nlo = nlo + 1
319 nlo = enc_int(nled, nlo, streak); nled[nlo] = 9 as u8; nlo = nlo + 1
320 nlo = enc_int(nled, nlo, now); nled[nlo] = 10 as u8; nlo = nlo + 1
321 // emit row
322 if mode == 0 {
323 w(1, " ");
324 if hh == 1 { w(1, "[ok] " as *u8) } else { w(1, "[DEAD]" as *u8) }
325 w(1, " " as *u8); w(1, route); w(1, " " as *u8); w(1, clabel); w(1, " (" as *u8); wn(1, st); w(1, ")" as *u8)
326 if streak > 0 { w(1, " fails=" as *u8); wn(1, streak) }
327 w(1, "\n" as *u8)
328 }
329 if mode == 1 {
330 if jfirst == 0 { wc(1, 44) }
331 jfirst = 0
332 w2(1, "{'route':'" as *u8); w(1, route); w2(1, "','title':'" as *u8); w(1, title); w2(1, "','status':" as *u8); wn(1, st)
333 w2(1, ",'class':'" as *u8); w(1, clabel); w2(1, "','healthy':" as *u8); wn(1, hh)
334 w2(1, ",'fail_streak':" as *u8); wn(1, streak); w2(1, ",'last_live_unix':" as *u8); wn(1, last_live); w2(1, "}" as *u8)
335 }
336 if mode == 2 {
337 w2(1, "<tr><td>" as *u8); w(1, title); w2(1, "</td><td><a href='" as *u8); w(1, route); w2(1, "'>" as *u8); w(1, route); w2(1, "</a></td><td>" as *u8); wn(1, st)
338 w2(1, "</td><td><span class='b " as *u8)
339 if hh == 1 {
340 if cls == 1 { w2(1, "live'>LIVE" as *u8) } else {
341 if cls == 2 { w2(1, "gated'>GATED" as *u8) } else {
342 if cls == 3 { w2(1, "redir'>REDIRECT" as *u8) } else { w2(1, "gated'>API" as *u8) }
343 }
344 }
345 } else { w2(1, "dead'>DEAD" as *u8) }
346 w2(1, "</span></td><td>" as *u8); wn(1, streak); w2(1, "</td></tr>\n" as *u8)
347 }
348 }
349 } }
350 i = j + 1
351 }
352
353 // write the refreshed ledger ONLY when the probe is credible (>=60% healthy). A mid-loop edge bounce that
354 // fails many surfaces (canary passed at the start, then sites.elf restarted) must NOT overwrite the
355 // last-good ledger -- home/sitemap regenerate from it. Dual-path (repo layout, else CWD/root-owned NAS).
356 let credible: i64 = ((total > 0) as i64) & (((healthy * 100) >= (total * 60)) as i64)
357 if credible == 1 {
358 var lfd: i64 = sys_openat_wr("knowledge/site/link_health.tsv" as *u8, 0x1a4)
359 if lfd < 0 { lfd = sys_openat_wr("link_health.tsv" as *u8, 0x1a4) }
360 if lfd >= 0 { sys_write(lfd, nled, nlo); sys_close(lfd) }
361 }
362
363 if mode == 2 {
364 w2(1, "</tbody></table>\n<div class='tot'><span>" as *u8); wn(1, total); w2(1, " links</span><span>" as *u8); wn(1, healthy)
365 w2(1, " healthy</span><span>" as *u8); wn(1, dead); w2(1, " down</span><span>" as *u8); wn(1, archcand); w2(1, " archive candidates</span></div>\n" as *u8)
366 w2(1, "<p class='foot'>Probed by nx_link_sentinel over the sovereign TLS edge. Archive candidate = " as *u8); wn(1, ARCHIVE_THRESHOLD); w2(1, "+ consecutive failed probes. Links stay live until deliberately archived.</p>\n</main></body></html>\n" as *u8)
367 sys_exit(0); return 0
368 }
369 if mode == 1 {
370 w2(1, "],'tally':{'total':" as *u8); wn(1, total); w2(1, ",'healthy':" as *u8); wn(1, healthy); w2(1, ",'down':" as *u8); wn(1, dead)
371 w2(1, ",'archive_candidates':" as *u8); wn(1, archcand); w2(1, "}}" as *u8); wc(1, 10)
372 sys_exit(0); return 0
373 }
374 w(1, " ----\n total=" as *u8); wn(1, total); w(1, " healthy=" as *u8); wn(1, healthy); w(1, " down=" as *u8); wn(1, dead); w(1, " archive-candidates=" as *u8); wn(1, archcand); w(1, "\n" as *u8)
375 w(1, " LIAR-KILL: probed-all=" as *u8); wn(1, (total > 0) as i64); w(1, " ledger-written=" as *u8); wn(1, (nlo > 0) as i64); w(1, "\n" as *u8)
376 w(1, "NX-LINK-SENTINEL verdict=" as *u8)
377 if total > 0 { w(1, "GREEN (probed " as *u8); wn(1, total); w(1, ", " as *u8); wn(1, dead); w(1, " down)\n" as *u8); sys_exit(0); return 0 }
378 w(1, "RED (no surfaces probed)\n" as *u8); sys_exit(1); return 1
379}