Merge pull request #214 from telemt/flow

Desync Full Forensics + ME Pool Updater + Soft Reinit

Cargo.lock

@@ -55,6 +55,45 @@ version = "1.0.101"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5f0e0fee31ef5ed1ba1316088939cea399010ed7731dba877ed44aeb407a75ea"
 
+[[package]]
+name = "asn1-rs"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7f6fd5ddaf0351dff5b8da21b2fb4ff8e08ddd02857f0bf69c47639106c0fff0"
+dependencies = [
+ "asn1-rs-derive",
+ "asn1-rs-impl",
+ "displaydoc",
+ "nom",
+ "num-traits",
+ "rusticata-macros",
+ "thiserror 1.0.69",
+ "time",
+]
+
+[[package]]
+name = "asn1-rs-derive"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "726535892e8eae7e70657b4c8ea93d26b8553afb1ce617caee529ef96d7dee6c"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 1.0.109",
+ "synstructure 0.12.6",
+]
+
+[[package]]
+name = "asn1-rs-impl"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2777730b2039ac0f95f093556e61b6d26cebed5393ca6f152717777cec3a42ed"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 1.0.109",
+]
+
 [[package]]
 name = "atomic-waker"
 version = "1.1.2"
@@ -88,6 +127,12 @@ version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5e764a1d40d510daf35e07be9eb06e75770908c27d411ee6c92109c9840eaaf7"
 
+[[package]]
+name = "bitflags"
+version = "1.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
+
 [[package]]
 name = "bitflags"
 version = "2.10.0"
@@ -155,6 +200,12 @@ version = "1.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9330f8b2ff13f34540b44e946ef35111825727b38d33286ef986142615121801"
 
+[[package]]
+name = "cfg_aliases"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fd16c4719339c4530435d38e511904438d07cce7950afa3718a84ac36c10e89e"
+
 [[package]]
 name = "cfg_aliases"
 version = "0.2.1"
@@ -252,6 +303,15 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "crc32c"
+version = "0.6.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3a47af21622d091a8f0fb295b88bc886ac74efcc613efc19f5d0b21de5c89e47"
+dependencies = [
+ "rustc_version",
+]
+
 [[package]]
 name = "crc32fast"
 version = "1.5.0"
@@ -297,6 +357,15 @@ dependencies = [
  "itertools",
 ]
 
+[[package]]
+name = "crossbeam-channel"
+version = "0.5.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "82b8f8f868b36967f9606790d1903570de9ceaf870a7bf9fbbd3016d636a2cb2"
+dependencies = [
+ "crossbeam-utils",
+]
+
 [[package]]
 name = "crossbeam-deque"
 version = "0.8.6"
@@ -369,6 +438,35 @@ dependencies = [
  "parking_lot_core",
 ]
 
+[[package]]
+name = "data-encoding"
+version = "2.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d7a1e2f27636f116493b8b860f5546edb47c8d8f8ea73e1d2a20be88e28d1fea"
+
+[[package]]
+name = "der-parser"
+version = "8.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dbd676fbbab537128ef0278adb5576cf363cff6aa22a7b24effe97347cfab61e"
+dependencies = [
+ "asn1-rs",
+ "displaydoc",
+ "nom",
+ "num-bigint",
+ "num-traits",
+ "rusticata-macros",
+]
+
+[[package]]
+name = "deranged"
+version = "0.5.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7cd812cc2bc1d69d4764bd80df88b4317eaef9e773c75226407d9bc0876b211c"
+dependencies = [
+ "powerfmt",
+]
+
 [[package]]
 name = "digest"
 version = "0.10.7"
@@ -388,7 +486,7 @@ checksum = "97369cbbc041bc366949bc74d34658d6cda5621039731c6310521892a3a20ae0"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.114",
 ]
 
 [[package]]
@@ -419,6 +517,17 @@ version = "2.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "37909eebbb50d72f9059c3b6d82c0463f2ff062c9e95845c43a6c9c0355411be"
 
+[[package]]
+name = "filetime"
+version = "0.2.27"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f98844151eee8917efc50bd9e8318cb963ae8b297431495d3f758616ea5c57db"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "libredox",
+]
+
 [[package]]
 name = "find-msvc-tools"
 version = "0.1.9"
@@ -452,6 +561,15 @@ dependencies = [
  "percent-encoding",
 ]
 
+[[package]]
+name = "fsevent-sys"
+version = "4.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "76ee7a02da4d231650c7cea31349b889be2f45ddb3ef3032d2ec8185f6313fd2"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "futures"
 version = "0.3.31"
@@ -508,7 +626,7 @@ checksum = "162ee34ebcb7c64a8abebc059ce0fee27c2262618d7b60ed8faf72fef13c3650"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.114",
 ]
 
 [[package]]
@@ -756,7 +874,7 @@ dependencies = [
  "tokio",
  "tokio-rustls",
  "tower-service",
- "webpki-roots",
+ "webpki-roots 1.0.6",
 ]
 
 [[package]]
@@ -926,6 +1044,26 @@ dependencies = [
  "serde_core",
 ]
 
+[[package]]
+name = "inotify"
+version = "0.9.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f8069d3ec154eb856955c1c0fbffefbf5f3c40a104ec912d4797314c1801abff"
+dependencies = [
+ "bitflags 1.3.2",
+ "inotify-sys",
+ "libc",
+]
+
+[[package]]
+name = "inotify-sys"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e05c02b5e89bff3b946cedeca278abc628fe811e604f027c45a8aa3cf793d0eb"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "inout"
 version = "0.1.4"
@@ -942,6 +1080,15 @@ version = "2.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "469fb0b9cefa57e3ef31275ee7cacb78f2fdca44e4765491884a2b119d4eb130"
 
+[[package]]
+name = "ipnetwork"
+version = "0.20.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bf466541e9d546596ee94f9f69590f89473455f88372423e0008fc1a7daf100e"
+dependencies = [
+ "serde",
+]
+
 [[package]]
 name = "iri-string"
 version = "0.7.10"
@@ -988,6 +1135,26 @@ dependencies = [
  "wasm-bindgen",
 ]
 
+[[package]]
+name = "kqueue"
+version = "1.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "eac30106d7dce88daf4a3fcb4879ea939476d5074a9b7ddd0fb97fa4bed5596a"
+dependencies = [
+ "kqueue-sys",
+ "libc",
+]
+
+[[package]]
+name = "kqueue-sys"
+version = "1.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ed9625ffda8729b85e45cf04090035ac368927b8cebc34898e7c120f52e4838b"
+dependencies = [
+ "bitflags 1.3.2",
+ "libc",
+]
+
 [[package]]
 name = "lazy_static"
 version = "1.5.0"
@@ -1006,6 +1173,17 @@ version = "0.2.181"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "459427e2af2b9c839b132acb702a1c654d95e10f8c326bfc2ad11310e458b1c5"
 
+[[package]]
+name = "libredox"
+version = "0.1.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3d0b95e02c851351f877147b7deea7b1afb1df71b63aa5f8270716e0c5720616"
+dependencies = [
+ "bitflags 2.10.0",
+ "libc",
+ "redox_syscall 0.7.1",
+]
+
 [[package]]
 name = "linux-raw-sys"
 version = "0.11.0"
@@ -1073,6 +1251,33 @@ version = "2.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f8ca58f447f06ed17d5fc4043ce1b10dd205e060fb3ce5b979b8ed8e59ff3f79"
 
+[[package]]
+name = "memoffset"
+version = "0.9.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "488016bfae457b036d996092f6cb448677611ce4449e970ceaf42695203f218a"
+dependencies = [
+ "autocfg",
+]
+
+[[package]]
+name = "minimal-lexical"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "68354c5c6bd36d73ff3feceb05efa59b6acb7626617f4962be322a825e61f79a"
+
+[[package]]
+name = "mio"
+version = "0.8.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a4a650543ca06a924e8b371db273b2756685faae30f8487da1b56505a8f78b0c"
+dependencies = [
+ "libc",
+ "log",
+ "wasi",
+ "windows-sys 0.48.0",
+]
+
 [[package]]
 name = "mio"
 version = "1.1.1"
@@ -1084,6 +1289,48 @@ dependencies = [
  "windows-sys 0.61.2",
 ]
 
+[[package]]
+name = "nix"
+version = "0.28.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ab2156c4fce2f8df6c499cc1c763e4394b7482525bf2a9701c9d79d215f519e4"
+dependencies = [
+ "bitflags 2.10.0",
+ "cfg-if",
+ "cfg_aliases 0.1.1",
+ "libc",
+ "memoffset",
+]
+
+[[package]]
+name = "nom"
+version = "7.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d273983c5a657a70a3e8f2a01329822f3b8c8172b73826411a55751e404a0a4a"
+dependencies = [
+ "memchr",
+ "minimal-lexical",
+]
+
+[[package]]
+name = "notify"
+version = "6.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6205bd8bb1e454ad2e27422015fb5e4f2bcc7e08fa8f27058670d208324a4d2d"
+dependencies = [
+ "bitflags 2.10.0",
+ "crossbeam-channel",
+ "filetime",
+ "fsevent-sys",
+ "inotify",
+ "kqueue",
+ "libc",
+ "log",
+ "mio 0.8.11",
+ "walkdir",
+ "windows-sys 0.48.0",
+]
+
 [[package]]
 name = "nu-ansi-term"
 version = "0.50.3"
@@ -1103,6 +1350,12 @@ dependencies = [
  "num-traits",
 ]
 
+[[package]]
+name = "num-conv"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cf97ec579c3c42f953ef76dbf8d55ac91fb219dde70e49aa4a6b7d74e9919050"
+
 [[package]]
 name = "num-integer"
 version = "0.1.46"
@@ -1121,6 +1374,15 @@ dependencies = [
  "autocfg",
 ]
 
+[[package]]
+name = "oid-registry"
+version = "0.6.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9bedf36ffb6ba96c2eb7144ef6270557b52e54b20c0a8e1eb2ff99a6c6959bff"
+dependencies = [
+ "asn1-rs",
+]
+
 [[package]]
 name = "once_cell"
 version = "1.21.3"
@@ -1151,7 +1413,7 @@ checksum = "2621685985a2ebf1c516881c026032ac7deafcda1a2c9b7850dc81e3dfcb64c1"
 dependencies = [
  "cfg-if",
  "libc",
- "redox_syscall",
+ "redox_syscall 0.5.18",
  "smallvec",
  "windows-link",
 ]
@@ -1211,6 +1473,12 @@ dependencies = [
  "zerovec",
 ]
 
+[[package]]
+name = "powerfmt"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "439ee305def115ba05938db6eb1644ff94165c5ab5e9420d1c1bcedbba909391"
+
 [[package]]
 name = "ppv-lite86"
 version = "0.2.21"
@@ -1227,7 +1495,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "479ca8adacdd7ce8f1fb39ce9ecccbfe93a3f1344b3d0d97f20bc0196208f62b"
 dependencies = [
  "proc-macro2",
- "syn",
+ "syn 2.0.114",
 ]
 
 [[package]]
@@ -1247,7 +1515,7 @@ checksum = "37566cb3fdacef14c0737f9546df7cfeadbfbc9fef10991038bf5015d0c80532"
 dependencies = [
  "bit-set",
  "bit-vec",
- "bitflags",
+ "bitflags 2.10.0",
  "num-traits",
  "rand",
  "rand_chacha",
@@ -1271,14 +1539,14 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b9e20a958963c291dc322d98411f541009df2ced7b5a4f2bd52337638cfccf20"
 dependencies = [
  "bytes",
- "cfg_aliases",
+ "cfg_aliases 0.2.1",
  "pin-project-lite",
  "quinn-proto",
  "quinn-udp",
  "rustc-hash",
  "rustls",
  "socket2 0.6.2",
- "thiserror",
+ "thiserror 2.0.18",
  "tokio",
  "tracing",
  "web-time",
@@ -1299,7 +1567,7 @@ dependencies = [
  "rustls",
  "rustls-pki-types",
  "slab",
- "thiserror",
+ "thiserror 2.0.18",
  "tinyvec",
  "tracing",
  "web-time",
@@ -1311,7 +1579,7 @@ version = "0.5.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "addec6a0dcad8a8d96a771f815f0eaf55f9d1805756410b39f5fa81332574cbd"
 dependencies = [
- "cfg_aliases",
+ "cfg_aliases 0.2.1",
  "libc",
  "once_cell",
  "socket2 0.6.2",
@@ -1398,7 +1666,16 @@ version = "0.5.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ed2bf2547551a7053d6fdfafda3f938979645c44812fbfcda098faae3f1a362d"
 dependencies = [
- "bitflags",
+ "bitflags 2.10.0",
+]
+
+[[package]]
+name = "redox_syscall"
+version = "0.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "35985aa610addc02e24fc232012c86fd11f14111180f902b67e2d5331f8ebf2b"
+dependencies = [
+ "bitflags 2.10.0",
 ]
 
 [[package]]
@@ -1465,7 +1742,7 @@ dependencies = [
  "wasm-bindgen",
  "wasm-bindgen-futures",
  "web-sys",
- "webpki-roots",
+ "webpki-roots 1.0.6",
 ]
 
 [[package]]
@@ -1488,13 +1765,31 @@ version = "2.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "357703d41365b4b27c590e3ed91eabb1b663f07c4c084095e60cbed4362dff0d"
 
+[[package]]
+name = "rustc_version"
+version = "0.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cfcb3a22ef46e85b45de6ee7e79d063319ebb6594faafcf1c225ea92ab6e9b92"
+dependencies = [
+ "semver",
+]
+
+[[package]]
+name = "rusticata-macros"
+version = "4.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "faf0c4a6ece9950b9abdb62b1cfcf2a68b3b67a10ba445b3bb85be2a293d0632"
+dependencies = [
+ "nom",
+]
+
 [[package]]
 name = "rustix"
 version = "1.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "146c9e247ccc180c1f61615433868c99f3de3ae256a30a43b49f67c2d9171f34"
 dependencies = [
- "bitflags",
+ "bitflags 2.10.0",
  "errno",
  "libc",
  "linux-raw-sys",
@@ -1608,7 +1903,7 @@ checksum = "d540f220d3187173da220f885ab66608367b6574e925011a9353e4badda91d79"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.114",
 ]
 
 [[package]]
@@ -1736,6 +2031,17 @@ version = "2.6.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "13c2bddecc57b384dee18652358fb23172facb8a2c51ccc10d74c157bdea3292"
 
+[[package]]
+name = "syn"
+version = "1.0.109"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "72b64191b275b66ffe2469e8af2c1cfe3bafa67b529ead792a6d0160888b4237"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
+
 [[package]]
 name = "syn"
 version = "2.0.114"
@@ -1756,6 +2062,18 @@ dependencies = [
  "futures-core",
 ]
 
+[[package]]
+name = "synstructure"
+version = "0.12.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f36bdaa60a83aca3921b5259d5400cbf5e90fc51931376a9bd4a0eb79aa7210f"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 1.0.109",
+ "unicode-xid",
+]
+
 [[package]]
 name = "synstructure"
 version = "0.13.2"
@@ -1764,18 +2082,20 @@ checksum = "728a70f3dbaf5bab7f0c4b1ac8d7ae5ea60a4b5549c8a5914361c99147a709d2"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.114",
 ]
 
 [[package]]
 name = "telemt"
-version = "3.0.0"
+version = "3.0.10"
 dependencies = [
  "aes",
+ "anyhow",
  "base64",
  "bytes",
  "cbc",
  "chrono",
+ "crc32c",
  "crc32fast",
  "criterion",
  "crossbeam-queue",
@@ -1788,9 +2108,12 @@ dependencies = [
  "httpdate",
  "hyper",
  "hyper-util",
+ "ipnetwork",
  "libc",
  "lru",
  "md-5",
+ "nix",
+ "notify",
  "num-bigint",
  "num-traits",
  "parking_lot",
@@ -1798,19 +2121,23 @@ dependencies = [
  "rand",
  "regex",
  "reqwest",
+ "rustls",
  "serde",
  "serde_json",
  "sha1",
  "sha2",
  "socket2 0.5.10",
- "thiserror",
+ "thiserror 2.0.18",
  "tokio",
+ "tokio-rustls",
  "tokio-test",
  "tokio-util",
  "toml",
  "tracing",
  "tracing-subscriber",
  "url",
+ "webpki-roots 0.26.11",
+ "x509-parser",
  "zeroize",
 ]
 
@@ -1827,13 +2154,33 @@ dependencies = [
  "windows-sys 0.61.2",
 ]
 
+[[package]]
+name = "thiserror"
+version = "1.0.69"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b6aaf5339b578ea85b50e080feb250a3e8ae8cfcdff9a461c9ec2904bc923f52"
+dependencies = [
+ "thiserror-impl 1.0.69",
+]
+
 [[package]]
 name = "thiserror"
 version = "2.0.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4288b5bcbc7920c07a1149a35cf9590a2aa808e0bc1eafaade0b80947865fbc4"
 dependencies = [
- "thiserror-impl",
+ "thiserror-impl 2.0.18",
+]
+
+[[package]]
+name = "thiserror-impl"
+version = "1.0.69"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4fee6c4efc90059e10f81e6d42c60a18f76588c3d74cb83a0b242a2b6c7504c1"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.114",
 ]
 
 [[package]]
@@ -1844,7 +2191,7 @@ checksum = "ebc4ee7f67670e9b64d05fa4253e753e016c6c95ff35b89b7941d6b856dec1d5"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.114",
 ]
 
 [[package]]
@@ -1856,6 +2203,37 @@ dependencies = [
  "cfg-if",
 ]
 
+[[package]]
+name = "time"
+version = "0.3.47"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "743bd48c283afc0388f9b8827b976905fb217ad9e647fae3a379a9283c4def2c"
+dependencies = [
+ "deranged",
+ "itoa",
+ "num-conv",
+ "powerfmt",
+ "serde_core",
+ "time-core",
+ "time-macros",
+]
+
+[[package]]
+name = "time-core"
+version = "0.1.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7694e1cfe791f8d31026952abf09c69ca6f6fa4e1a1229e18988f06a04a12dca"
+
+[[package]]
+name = "time-macros"
+version = "0.2.27"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2e70e4c5a0e0a8a4823ad65dfe1a6930e4f4d756dcd9dd7939022b5e8c501215"
+dependencies = [
+ "num-conv",
+ "time-core",
+]
+
 [[package]]
 name = "tinystr"
 version = "0.8.2"
@@ -1899,7 +2277,7 @@ checksum = "72a2903cd7736441aac9df9d7688bd0ce48edccaadf181c3b90be801e81d3d86"
 dependencies = [
  "bytes",
  "libc",
- "mio",
+ "mio 1.1.1",
  "parking_lot",
  "pin-project-lite",
  "signal-hook-registry",
@@ -1917,7 +2295,7 @@ checksum = "af407857209536a95c8e56f8231ef2c2e2aff839b22e07a1ffcbc617e9db9fa5"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.114",
 ]
 
 [[package]]
@@ -2031,7 +2409,7 @@ version = "0.6.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d4e6559d53cc268e5031cd8429d05415bc4cb4aefc4aa5d6cc35fbf5b924a1f8"
 dependencies = [
- "bitflags",
+ "bitflags 2.10.0",
  "bytes",
  "futures-util",
  "http",
@@ -2074,7 +2452,7 @@ checksum = "7490cfa5ec963746568740651ac6781f701c9c5ea257c58e057f3ba8cf69e8da"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.114",
 ]
 
 [[package]]
@@ -2280,7 +2658,7 @@ dependencies = [
  "bumpalo",
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.114",
  "wasm-bindgen-shared",
 ]
 
@@ -2321,7 +2699,7 @@ version = "0.244.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "47b807c72e1bac69382b3a6fb3dbe8ea4c0ed87ff5629b8685ae6b9a611028fe"
 dependencies = [
- "bitflags",
+ "bitflags 2.10.0",
  "hashbrown 0.15.5",
  "indexmap",
  "semver",
@@ -2347,6 +2725,15 @@ dependencies = [
  "wasm-bindgen",
 ]
 
+[[package]]
+name = "webpki-roots"
+version = "0.26.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "521bc38abb08001b01866da9f51eb7c5d647a19260e00054a8c7fd5f9e57f7a9"
+dependencies = [
+ "webpki-roots 1.0.6",
+]
+
 [[package]]
 name = "webpki-roots"
 version = "1.0.6"
@@ -2386,7 +2773,7 @@ checksum = "053e2e040ab57b9dc951b72c264860db7eb3b0200ba345b4e4c3b14f67855ddf"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.114",
 ]
 
 [[package]]
@@ -2397,7 +2784,7 @@ checksum = "3f316c4a2570ba26bbec722032c4099d8c8bc095efccdc15688708623367e358"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.114",
 ]
 
 [[package]]
@@ -2424,6 +2811,15 @@ dependencies = [
  "windows-link",
 ]
 
+[[package]]
+name = "windows-sys"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "677d2418bec65e3338edb076e806bc1ec15693c5d0104683f2efe857f61056a9"
+dependencies = [
+ "windows-targets 0.48.5",
+]
+
 [[package]]
 name = "windows-sys"
 version = "0.52.0"
@@ -2451,6 +2847,21 @@ dependencies = [
  "windows-link",
 ]
 
+[[package]]
+name = "windows-targets"
+version = "0.48.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9a2fa6e2155d7247be68c096456083145c183cbbbc2764150dda45a87197940c"
+dependencies = [
+ "windows_aarch64_gnullvm 0.48.5",
+ "windows_aarch64_msvc 0.48.5",
+ "windows_i686_gnu 0.48.5",
+ "windows_i686_msvc 0.48.5",
+ "windows_x86_64_gnu 0.48.5",
+ "windows_x86_64_gnullvm 0.48.5",
+ "windows_x86_64_msvc 0.48.5",
+]
+
 [[package]]
 name = "windows-targets"
 version = "0.52.6"
@@ -2484,6 +2895,12 @@ dependencies = [
  "windows_x86_64_msvc 0.53.1",
 ]
 
+[[package]]
+name = "windows_aarch64_gnullvm"
+version = "0.48.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2b38e32f0abccf9987a4e3079dfb67dcd799fb61361e53e2882c3cbaf0d905d8"
+
 [[package]]
 name = "windows_aarch64_gnullvm"
 version = "0.52.6"
@@ -2496,6 +2913,12 @@ version = "0.53.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a9d8416fa8b42f5c947f8482c43e7d89e73a173cead56d044f6a56104a6d1b53"
 
+[[package]]
+name = "windows_aarch64_msvc"
+version = "0.48.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dc35310971f3b2dbbf3f0690a219f40e2d9afcf64f9ab7cc1be722937c26b4bc"
+
 [[package]]
 name = "windows_aarch64_msvc"
 version = "0.52.6"
@@ -2508,6 +2931,12 @@ version = "0.53.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b9d782e804c2f632e395708e99a94275910eb9100b2114651e04744e9b125006"
 
+[[package]]
+name = "windows_i686_gnu"
+version = "0.48.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a75915e7def60c94dcef72200b9a8e58e5091744960da64ec734a6c6e9b3743e"
+
 [[package]]
 name = "windows_i686_gnu"
 version = "0.52.6"
@@ -2532,6 +2961,12 @@ version = "0.53.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "fa7359d10048f68ab8b09fa71c3daccfb0e9b559aed648a8f95469c27057180c"
 
+[[package]]
+name = "windows_i686_msvc"
+version = "0.48.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8f55c233f70c4b27f66c523580f78f1004e8b5a8b659e05a4eb49d4166cca406"
+
 [[package]]
 name = "windows_i686_msvc"
 version = "0.52.6"
@@ -2544,6 +2979,12 @@ version = "0.53.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1e7ac75179f18232fe9c285163565a57ef8d3c89254a30685b57d83a38d326c2"
 
+[[package]]
+name = "windows_x86_64_gnu"
+version = "0.48.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "53d40abd2583d23e4718fddf1ebec84dbff8381c07cae67ff7768bbf19c6718e"
+
 [[package]]
 name = "windows_x86_64_gnu"
 version = "0.52.6"
@@ -2556,6 +2997,12 @@ version = "0.53.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9c3842cdd74a865a8066ab39c8a7a473c0778a3f29370b5fd6b4b9aa7df4a499"
 
+[[package]]
+name = "windows_x86_64_gnullvm"
+version = "0.48.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0b7b52767868a23d5bab768e390dc5f5c55825b6d30b86c844ff2dc7414044cc"
+
 [[package]]
 name = "windows_x86_64_gnullvm"
 version = "0.52.6"
@@ -2568,6 +3015,12 @@ version = "0.53.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0ffa179e2d07eee8ad8f57493436566c7cc30ac536a3379fdf008f47f6bb7ae1"
 
+[[package]]
+name = "windows_x86_64_msvc"
+version = "0.48.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ed94fce61571a4006852b7389a063ab983c02eb1bb37b47f8272ce92d06d9538"
+
 [[package]]
 name = "windows_x86_64_msvc"
 version = "0.52.6"
@@ -2619,7 +3072,7 @@ dependencies = [
  "heck",
  "indexmap",
  "prettyplease",
- "syn",
+ "syn 2.0.114",
  "wasm-metadata",
  "wit-bindgen-core",
  "wit-component",
@@ -2635,7 +3088,7 @@ dependencies = [
  "prettyplease",
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.114",
  "wit-bindgen-core",
  "wit-bindgen-rust",
 ]
@@ -2647,7 +3100,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9d66ea20e9553b30172b5e831994e35fbde2d165325bec84fc43dbf6f4eb9cb2"
 dependencies = [
  "anyhow",
- "bitflags",
+ "bitflags 2.10.0",
  "indexmap",
  "log",
  "serde",
@@ -2683,6 +3136,23 @@ version = "0.6.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9edde0db4769d2dc68579893f2306b26c6ecfbe0ef499b013d731b7b9247e0b9"
 
+[[package]]
+name = "x509-parser"
+version = "0.15.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7069fba5b66b9193bd2c5d3d4ff12b839118f6bcbef5328efafafb5395cf63da"
+dependencies = [
+ "asn1-rs",
+ "data-encoding",
+ "der-parser",
+ "lazy_static",
+ "nom",
+ "oid-registry",
+ "rusticata-macros",
+ "thiserror 1.0.69",
+ "time",
+]
+
 [[package]]
 name = "yoke"
 version = "0.8.1"
@@ -2702,8 +3172,8 @@ checksum = "b659052874eb698efe5b9e8cf382204678a0086ebf46982b79d6ca3182927e5d"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.114",
- "synstructure",
+ "synstructure 0.13.2",
 ]
 
 [[package]]
@@ -2723,7 +3193,7 @@ checksum = "4122cd3169e94605190e77839c9a40d40ed048d305bfdc146e7df40ab0f3e517"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.114",
 ]
 
 [[package]]
@@ -2743,8 +3213,8 @@ checksum = "d71e5d6e06ab090c67b5e44993ec16b72dcbaabc526db883a360057678b48502"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.114",
- "synstructure",
+ "synstructure 0.13.2",
 ]
 
 [[package]]
@@ -2764,7 +3234,7 @@ checksum = "85a5b4158499876c763cb03bc4e49185d3cccbabb15b33c627f7884f43db852e"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.114",
 ]
 
 [[package]]
@@ -2797,7 +3267,7 @@ checksum = "eadce39539ca5cb3985590102671f2567e659fca9666581ad3411d59207951f3"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.114",
 ]
 
 [[package]]

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "telemt"
-version = "3.0.9"
+version = "3.0.12"
 edition = "2024"
 
 [dependencies]

README.md

@@ -10,41 +10,77 @@
 
 ### 🇷🇺 RU
 
-18 февраля мы опубликовали `telemt 3.0.3`, он имеет:
+#### Драфтинг LTS и текущие улучшения
 
-- улучшенный механизм Middle-End Health Check
+С 21 февраля мы начали подготовку LTS-версии.
-- высокоскоростное восстановление инициализации Middle-End
-- меньше задержек на hot-path
-- более корректную работу в Dualstack, а именно - IPv6 Middle-End
-- аккуратное переподключение клиента без дрифта сессий между Middle-End
-- автоматическая деградация на Direct-DC при массовой (>2 ME-DC-групп) недоступности Middle-End
-- автодетект IP за NAT, при возможности - будет выполнен хендшейк с ME, при неудаче - автодеградация
-- единственный известный специальный DC=203 уже добавлен в код: медиа загружаются с CDN в Direct-DC режиме
 
-[Здесь вы можете найти релиз](https://github.com/telemt/telemt/releases/tag/3.0.3)
+Мы внимательно анализируем весь доступный фидбек.  
+Наша цель — сделать LTS-кандидаты максимально стабильными, тщательно отлаженными и готовыми к long-run и highload production-сценариям.
 
-Если у вас есть компетенции в асинхронных сетевых приложениях, анализе трафика, реверс-инжиниринге или сетевых расследованиях - мы открыты к идеям и pull requests!
+---
 
+#### Улучшения от 23 февраля
+
+23 февраля были внесены улучшения производительности в режимах **DC** и **Middle-End (ME)**, с акцентом на обратный канал (путь клиент → DC / ME).
+
+Дополнительно реализован ряд изменений, направленных на повышение устойчивости системы:
+
+- Смягчение сетевой нестабильности  
+- Повышение устойчивости к десинхронизации криптографии  
+- Снижение дрейфа сессий при неблагоприятных условиях  
+- Улучшение обработки ошибок в edge-case транспортных сценариях  
+
+Релиз:  
+[3.0.9](https://github.com/telemt/telemt/releases/tag/3.0.9)
+
+---
+
+Если у вас есть компетенции в:
+
+- Асинхронных сетевых приложениях  
+- Анализе трафика  
+- Реверс-инжиниринге  
+- Сетевых расследованиях  
+
+Мы открыты к архитектурным предложениям, идеям и pull requests
 </td>
 <td width="50%" valign="top">
 
 ### 🇬🇧 EN
 
-On February 18, we released `telemt 3.0.3`. This version introduces:
+#### LTS Drafting and Ongoing Improvements
 
-- improved Middle-End Health Check method  
+Starting February 21, we began drafting the upcoming LTS version.
-- high-speed recovery of Middle-End init
-- reduced latency on the hot path  
-- correct Dualstack support: proper handling of IPv6 Middle-End  
-- *clean* client reconnection without session "drift" between Middle-End
-- automatic degradation to Direct-DC mode in case of large-scale (>2 ME-DC groups) Middle-End unavailability  
-- automatic public IP detection behind NAT; first - Middle-End handshake is performed, otherwise automatic degradation is applied  
-- known special DC=203 is now handled natively: media is delivered from the CDN via Direct-DC mode  
 
-[Release is available here](https://github.com/telemt/telemt/releases/tag/3.0.3)
+We are carefully reviewing and analyzing all available feedback.  
+The goal is to ensure that LTS candidates are максимально stable, thoroughly debugged, and ready for long-run and high-load production scenarios.
 
-If you have expertise in asynchronous network applications, traffic analysis, reverse engineering, or network forensics - we welcome ideas and pull requests!
+---
 
+#### February 23 Improvements
+
+On February 23, we introduced performance improvements for both **DC** and **Middle-End (ME)** modes, specifically optimizing the reverse channel (client → DC / ME data path).
+
+Additionally, we implemented a set of robustness enhancements designed to:
+
+- Mitigate network-related instability
+- Improve resilience against cryptographic desynchronization
+- Reduce session drift under adverse conditions
+- Improve error handling in edge-case transport scenarios
+
+Release:  
+[3.0.9](https://github.com/telemt/telemt/releases/tag/3.0.9)
+
+---
+
+If you have expertise in:
+
+- Asynchronous network applications  
+- Traffic analysis  
+- Reverse engineering  
+- Network forensics  
+
+We welcome ideas, architectural feedback, and pull requests.
 </td>
 </tr>
 </table>

src/cli.rs

@@ -194,6 +194,9 @@ prefer_ipv6 = false
 fast_mode = true
 use_middle_proxy = false
 log_level = "normal"
+desync_all_full = false
+update_every = 43200
+me_reinit_drain_timeout_secs = 300
 
 [network]
 ipv4 = true
@@ -229,6 +232,7 @@ tls_domain = "{domain}"
 mask = true
 mask_port = 443
 fake_cert_len = 2048
+tls_full_cert_ttl_secs = 90
 
 [access]
 replay_check_len = 65536

src/config/defaults.rs

@@ -118,10 +118,18 @@ pub(crate) fn default_max_client_frame() -> usize {
     16 * 1024 * 1024
 }
 
+pub(crate) fn default_desync_all_full() -> bool {
+    false
+}
+
 pub(crate) fn default_tls_new_session_tickets() -> u8 {
     0
 }
 
+pub(crate) fn default_tls_full_cert_ttl_secs() -> u64 {
+    90
+}
+
 pub(crate) fn default_server_hello_delay_min_ms() -> u64 {
     0
 }
@@ -163,6 +171,14 @@ pub(crate) fn default_proxy_config_reload_secs() -> u64 {
     12 * 60 * 60
 }
 
+pub(crate) fn default_update_every_secs() -> u64 {
+    2 * 60 * 60
+}
+
+pub(crate) fn default_me_reinit_drain_timeout_secs() -> u64 {
+    300
+}
+
 pub(crate) fn default_ntp_check() -> bool {
     true
 }

src/config/hot_reload.rs

@@ -10,6 +10,9 @@
 //! | `general` | `ad_tag`                      | Passed on next connection         |
 //! | `general` | `middle_proxy_pool_size`      | Passed on next connection         |
 //! | `general` | `me_keepalive_*`              | Passed on next connection         |
+//! | `general` | `desync_all_full`             | Applied immediately               |
+//! | `general` | `update_every`                | Applied to ME updater immediately |
+//! | `general` | `me_reinit_drain_timeout_secs`| Applied on next ME map update     |
 //! | `access`  | All user/quota fields         | Effective immediately             |
 //!
 //! Fields that require re-binding sockets (`server.port`, `censorship.*`,
@@ -34,6 +37,9 @@ pub struct HotFields {
     pub log_level:               LogLevel,
     pub ad_tag:                  Option<String>,
     pub middle_proxy_pool_size:  usize,
+    pub desync_all_full:         bool,
+    pub update_every_secs:       u64,
+    pub me_reinit_drain_timeout_secs: u64,
     pub me_keepalive_enabled:    bool,
     pub me_keepalive_interval_secs: u64,
     pub me_keepalive_jitter_secs:   u64,
@@ -47,6 +53,9 @@ impl HotFields {
             log_level:               cfg.general.log_level.clone(),
             ad_tag:                  cfg.general.ad_tag.clone(),
             middle_proxy_pool_size:  cfg.general.middle_proxy_pool_size,
+            desync_all_full:         cfg.general.desync_all_full,
+            update_every_secs:       cfg.general.effective_update_every_secs(),
+            me_reinit_drain_timeout_secs: cfg.general.me_reinit_drain_timeout_secs,
             me_keepalive_enabled:    cfg.general.me_keepalive_enabled,
             me_keepalive_interval_secs: cfg.general.me_keepalive_interval_secs,
             me_keepalive_jitter_secs:   cfg.general.me_keepalive_jitter_secs,
@@ -175,6 +184,27 @@ fn log_changes(
         );
     }
 
+    if old_hot.desync_all_full != new_hot.desync_all_full {
+        info!(
+            "config reload: desync_all_full: {} → {}",
+            old_hot.desync_all_full, new_hot.desync_all_full,
+        );
+    }
+
+    if old_hot.update_every_secs != new_hot.update_every_secs {
+        info!(
+            "config reload: update_every(effective): {}s → {}s",
+            old_hot.update_every_secs, new_hot.update_every_secs,
+        );
+    }
+
+    if old_hot.me_reinit_drain_timeout_secs != new_hot.me_reinit_drain_timeout_secs {
+        info!(
+            "config reload: me_reinit_drain_timeout_secs: {}s → {}s",
+            old_hot.me_reinit_drain_timeout_secs, new_hot.me_reinit_drain_timeout_secs,
+        );
+    }
+
     if old_hot.me_keepalive_enabled        != new_hot.me_keepalive_enabled
     || old_hot.me_keepalive_interval_secs  != new_hot.me_keepalive_interval_secs
     || old_hot.me_keepalive_jitter_secs    != new_hot.me_keepalive_jitter_secs

src/config/load.rs

@@ -117,6 +117,34 @@ impl ProxyConfig {
         let mut config: ProxyConfig =
             toml::from_str(&processed).map_err(|e| ProxyError::Config(e.to_string()))?;
 
+        if let Some(update_every) = config.general.update_every {
+            if update_every == 0 {
+                return Err(ProxyError::Config(
+                    "general.update_every must be > 0".to_string(),
+                ));
+            }
+        } else {
+            let legacy_secret = config.general.proxy_secret_auto_reload_secs;
+            let legacy_config = config.general.proxy_config_auto_reload_secs;
+            let effective = legacy_secret.min(legacy_config);
+            if effective == 0 {
+                return Err(ProxyError::Config(
+                    "legacy proxy_*_auto_reload_secs values must be > 0 when general.update_every is not set".to_string(),
+                ));
+            }
+
+            if legacy_secret != default_proxy_secret_reload_secs()
+                || legacy_config != default_proxy_config_reload_secs()
+            {
+                warn!(
+                    proxy_secret_auto_reload_secs = legacy_secret,
+                    proxy_config_auto_reload_secs = legacy_config,
+                    effective_update_every_secs = effective,
+                    "proxy_*_auto_reload_secs are deprecated; set general.update_every"
+                );
+            }
+        }
+
         // Validate secrets.
         for (user, secret) in &config.access.users {
             if !secret.chars().all(|c| c.is_ascii_hexdigit()) || secret.len() != 32 {
@@ -347,4 +375,68 @@ mod tests {
             .unwrap_or(false));
         let _ = std::fs::remove_file(path);
     }
+
+    #[test]
+    fn update_every_overrides_legacy_fields() {
+        let toml = r#"
+            [general]
+            update_every = 123
+            proxy_secret_auto_reload_secs = 700
+            proxy_config_auto_reload_secs = 800
+
+            [censorship]
+            tls_domain = "example.com"
+
+            [access.users]
+            user = "00000000000000000000000000000000"
+        "#;
+        let dir = std::env::temp_dir();
+        let path = dir.join("telemt_update_every_override_test.toml");
+        std::fs::write(&path, toml).unwrap();
+        let cfg = ProxyConfig::load(&path).unwrap();
+        assert_eq!(cfg.general.effective_update_every_secs(), 123);
+        let _ = std::fs::remove_file(path);
+    }
+
+    #[test]
+    fn update_every_fallback_to_legacy_min() {
+        let toml = r#"
+            [general]
+            proxy_secret_auto_reload_secs = 600
+            proxy_config_auto_reload_secs = 120
+
+            [censorship]
+            tls_domain = "example.com"
+
+            [access.users]
+            user = "00000000000000000000000000000000"
+        "#;
+        let dir = std::env::temp_dir();
+        let path = dir.join("telemt_update_every_legacy_min_test.toml");
+        std::fs::write(&path, toml).unwrap();
+        let cfg = ProxyConfig::load(&path).unwrap();
+        assert_eq!(cfg.general.update_every, None);
+        assert_eq!(cfg.general.effective_update_every_secs(), 120);
+        let _ = std::fs::remove_file(path);
+    }
+
+    #[test]
+    fn update_every_zero_is_rejected() {
+        let toml = r#"
+            [general]
+            update_every = 0
+
+            [censorship]
+            tls_domain = "example.com"
+
+            [access.users]
+            user = "00000000000000000000000000000000"
+        "#;
+        let dir = std::env::temp_dir();
+        let path = dir.join("telemt_update_every_zero_test.toml");
+        std::fs::write(&path, toml).unwrap();
+        let err = ProxyConfig::load(&path).unwrap_err().to_string();
+        assert!(err.contains("general.update_every must be > 0"));
+        let _ = std::fs::remove_file(path);
+    }
 }

src/config/types.rs

@@ -201,6 +201,11 @@ pub struct GeneralConfig {
     #[serde(default = "default_max_client_frame")]
     pub max_client_frame: usize,
 
+    /// Emit full crypto-desync forensic logs for every event.
+    /// When false, full forensic details are emitted once per key window.
+    #[serde(default = "default_desync_all_full")]
+    pub desync_all_full: bool,
+
     /// Enable staggered warmup of extra ME writers.
     #[serde(default = "default_true")]
     pub me_warmup_stagger_enabled: bool,
@@ -252,11 +257,23 @@ pub struct GeneralConfig {
     #[serde(default = "default_fast_mode_min_tls_record")]
     pub fast_mode_min_tls_record: usize,
 
-    /// Automatically reload proxy-secret every N seconds.
+    /// Unified ME updater interval in seconds for getProxyConfig/getProxyConfigV6/getProxySecret.
+    /// When omitted, effective value falls back to legacy proxy_*_auto_reload_secs fields.
+    #[serde(default)]
+    pub update_every: Option<u64>,
+
+    /// Drain timeout in seconds for stale ME writers after endpoint map changes.
+    /// Set to 0 to keep stale writers draining indefinitely (no force-close).
+    #[serde(default = "default_me_reinit_drain_timeout_secs")]
+    pub me_reinit_drain_timeout_secs: u64,
+
+    /// Deprecated legacy setting; kept for backward compatibility fallback.
+    /// Use `update_every` instead.
     #[serde(default = "default_proxy_secret_reload_secs")]
     pub proxy_secret_auto_reload_secs: u64,
 
-    /// Automatically reload proxy-multi.conf every N seconds.
+    /// Deprecated legacy setting; kept for backward compatibility fallback.
+    /// Use `update_every` instead.
     #[serde(default = "default_proxy_config_reload_secs")]
     pub proxy_config_auto_reload_secs: u64,
 
@@ -310,7 +327,10 @@ impl Default for GeneralConfig {
             links: LinksConfig::default(),
             crypto_pending_buffer: default_crypto_pending_buffer(),
             max_client_frame: default_max_client_frame(),
+            desync_all_full: default_desync_all_full(),
             fast_mode_min_tls_record: default_fast_mode_min_tls_record(),
+            update_every: Some(default_update_every_secs()),
+            me_reinit_drain_timeout_secs: default_me_reinit_drain_timeout_secs(),
             proxy_secret_auto_reload_secs: default_proxy_secret_reload_secs(),
             proxy_config_auto_reload_secs: default_proxy_config_reload_secs(),
             ntp_check: default_ntp_check(),
@@ -321,6 +341,15 @@ impl Default for GeneralConfig {
     }
 }
 
+impl GeneralConfig {
+    /// Resolve the active updater interval for ME infrastructure refresh tasks.
+    /// `update_every` has priority, otherwise legacy proxy_*_auto_reload_secs are used.
+    pub fn effective_update_every_secs(&self) -> u64 {
+        self.update_every
+            .unwrap_or_else(|| self.proxy_secret_auto_reload_secs.min(self.proxy_config_auto_reload_secs))
+    }
+}
+
 /// `[general.links]` — proxy link generation settings.
 #[derive(Debug, Clone, Serialize, Deserialize, Default)]
 pub struct LinksConfig {
@@ -474,6 +503,12 @@ pub struct AntiCensorshipConfig {
     #[serde(default = "default_tls_new_session_tickets")]
     pub tls_new_session_tickets: u8,
 
+    /// TTL in seconds for sending full certificate payload per client IP.
+    /// First client connection per (SNI domain, client IP) gets full cert payload.
+    /// Subsequent handshakes within TTL use compact cert metadata payload.
+    #[serde(default = "default_tls_full_cert_ttl_secs")]
+    pub tls_full_cert_ttl_secs: u64,
+
     /// Enforce ALPN echo of client preference.
     #[serde(default = "default_alpn_enforce")]
     pub alpn_enforce: bool,
@@ -494,6 +529,7 @@ impl Default for AntiCensorshipConfig {
             server_hello_delay_min_ms: default_server_hello_delay_min_ms(),
             server_hello_delay_max_ms: default_server_hello_delay_max_ms(),
             tls_new_session_tickets: default_tls_new_session_tickets(),
+            tls_full_cert_ttl_secs: default_tls_full_cert_ttl_secs(),
             alpn_enforce: default_alpn_enforce(),
         }
     }

src/crypto/random.rs

@@ -49,19 +49,32 @@ impl SecureRandom {
         }
     }
     
-    /// Generate random bytes
+    /// Fill a caller-provided buffer with random bytes.
-    pub fn bytes(&self, len: usize) -> Vec<u8> {
+    pub fn fill(&self, out: &mut [u8]) {
         let mut inner = self.inner.lock();
         const CHUNK_SIZE: usize = 512;
 
-        while inner.buffer.len() < len {
+        let mut written = 0usize;
-            let mut chunk = vec![0u8; CHUNK_SIZE];
+        while written < out.len() {
-            inner.rng.fill_bytes(&mut chunk);
+            if inner.buffer.is_empty() {
-            inner.cipher.apply(&mut chunk);
+                let mut chunk = vec![0u8; CHUNK_SIZE];
-            inner.buffer.extend_from_slice(&chunk);
+                inner.rng.fill_bytes(&mut chunk);
-        }
+                inner.cipher.apply(&mut chunk);
+                inner.buffer.extend_from_slice(&chunk);
+            }
 
-        inner.buffer.drain(..len).collect()
+            let take = (out.len() - written).min(inner.buffer.len());
+            out[written..written + take].copy_from_slice(&inner.buffer[..take]);
+            inner.buffer.drain(..take);
+            written += take;
+        }
+    }
+
+    /// Generate random bytes
+    pub fn bytes(&self, len: usize) -> Vec<u8> {
+        let mut out = vec![0u8; len];
+        self.fill(&mut out);
+        out
     }
     
     /// Generate random number in range [0, max)

src/main.rs

@@ -265,7 +265,7 @@ async fn main() -> std::result::Result<(), Box<dyn std::error::Error>> {
     }
 
     // Connection concurrency limit
-    let _max_connections = Arc::new(Semaphore::new(10_000));
+    let max_connections = Arc::new(Semaphore::new(10_000));
 
     if use_middle_proxy && !decision.ipv4_me && !decision.ipv6_me {
         warn!("No usable IP family for Middle Proxy detected; falling back to direct DC");
@@ -392,18 +392,6 @@ match crate::transport::middle_proxy::fetch_proxy_secret(proxy_secret_path).awai
                             .await;
                         });
 
-                        // Periodic updater: getProxyConfig + proxy-secret
-                        let pool_clone2 = pool.clone();
-                        let rng_clone2 = rng.clone();
-                        tokio::spawn(async move {
-                            crate::transport::middle_proxy::me_config_updater(
-                                pool_clone2,
-                                rng_clone2,
-                                std::time::Duration::from_secs(12 * 3600),
-                            )
-                            .await;
-                        });
-
                         Some(pool)
                     }
                     Err(e) => {
@@ -702,6 +690,20 @@ match crate::transport::middle_proxy::fetch_proxy_secret(proxy_secret_path).awai
         detected_ip_v6,
     );
 
+    if let Some(ref pool) = me_pool {
+        let pool_clone = pool.clone();
+        let rng_clone = rng.clone();
+        let config_rx_clone = config_rx.clone();
+        tokio::spawn(async move {
+            crate::transport::middle_proxy::me_config_updater(
+                pool_clone,
+                rng_clone,
+                config_rx_clone,
+            )
+            .await;
+        });
+    }
+
     let mut listeners = Vec::new();
 
     for listener_conf in &config.server.listeners {
@@ -844,6 +846,7 @@ match crate::transport::middle_proxy::fetch_proxy_secret(proxy_secret_path).awai
         let me_pool = me_pool.clone();
         let tls_cache = tls_cache.clone();
         let ip_tracker = ip_tracker.clone();
+        let max_connections_unix = max_connections.clone();
 
         tokio::spawn(async move {
             let unix_conn_counter = std::sync::Arc::new(std::sync::atomic::AtomicU64::new(1));
@@ -851,6 +854,13 @@ match crate::transport::middle_proxy::fetch_proxy_secret(proxy_secret_path).awai
             loop {
                 match unix_listener.accept().await {
                     Ok((stream, _)) => {
+                        let permit = match max_connections_unix.clone().acquire_owned().await {
+                            Ok(permit) => permit,
+                            Err(_) => {
+                                error!("Connection limiter is closed");
+                                break;
+                            }
+                        };
                         let conn_id = unix_conn_counter.fetch_add(1, std::sync::atomic::Ordering::Relaxed);
                         let fake_peer = SocketAddr::from(([127, 0, 0, 1], (conn_id % 65535) as u16));
 
@@ -866,6 +876,7 @@ match crate::transport::middle_proxy::fetch_proxy_secret(proxy_secret_path).awai
                         let proxy_protocol_enabled = config.server.proxy_protocol;
 
                         tokio::spawn(async move {
+                            let _permit = permit;
                             if let Err(e) = crate::proxy::client::handle_client_stream(
                                 stream, fake_peer, config, stats,
                                 upstream_manager, replay_checker, buffer_pool, rng,
@@ -933,11 +944,19 @@ match crate::transport::middle_proxy::fetch_proxy_secret(proxy_secret_path).awai
         let me_pool = me_pool.clone();
         let tls_cache = tls_cache.clone();
         let ip_tracker = ip_tracker.clone();
+        let max_connections_tcp = max_connections.clone();
 
         tokio::spawn(async move {
             loop {
                 match listener.accept().await {
                     Ok((stream, peer_addr)) => {
+                        let permit = match max_connections_tcp.clone().acquire_owned().await {
+                            Ok(permit) => permit,
+                            Err(_) => {
+                                error!("Connection limiter is closed");
+                                break;
+                            }
+                        };
                         let config = config_rx.borrow_and_update().clone();
                         let stats = stats.clone();
                         let upstream_manager = upstream_manager.clone();
@@ -950,6 +969,7 @@ match crate::transport::middle_proxy::fetch_proxy_secret(proxy_secret_path).awai
                         let proxy_protocol_enabled = listener_proxy_protocol;
 
                         tokio::spawn(async move {
+                            let _permit = permit;
                             if let Err(e) = ClientHandler::new(
                                 stream,
                                 peer_addr,

src/metrics.rs

@@ -140,6 +140,41 @@ fn render_metrics(stats: &Stats) -> String {
     let _ = writeln!(out, "# TYPE telemt_secure_padding_invalid_total counter");
     let _ = writeln!(out, "telemt_secure_padding_invalid_total {}", stats.get_secure_padding_invalid());
 
+    let _ = writeln!(out, "# HELP telemt_desync_total Total crypto-desync detections");
+    let _ = writeln!(out, "# TYPE telemt_desync_total counter");
+    let _ = writeln!(out, "telemt_desync_total {}", stats.get_desync_total());
+
+    let _ = writeln!(out, "# HELP telemt_desync_full_logged_total Full forensic desync logs emitted");
+    let _ = writeln!(out, "# TYPE telemt_desync_full_logged_total counter");
+    let _ = writeln!(out, "telemt_desync_full_logged_total {}", stats.get_desync_full_logged());
+
+    let _ = writeln!(out, "# HELP telemt_desync_suppressed_total Suppressed desync forensic events");
+    let _ = writeln!(out, "# TYPE telemt_desync_suppressed_total counter");
+    let _ = writeln!(out, "telemt_desync_suppressed_total {}", stats.get_desync_suppressed());
+
+    let _ = writeln!(out, "# HELP telemt_desync_frames_bucket_total Desync count by frames_ok bucket");
+    let _ = writeln!(out, "# TYPE telemt_desync_frames_bucket_total counter");
+    let _ = writeln!(
+        out,
+        "telemt_desync_frames_bucket_total{{bucket=\"0\"}} {}",
+        stats.get_desync_frames_bucket_0()
+    );
+    let _ = writeln!(
+        out,
+        "telemt_desync_frames_bucket_total{{bucket=\"1_2\"}} {}",
+        stats.get_desync_frames_bucket_1_2()
+    );
+    let _ = writeln!(
+        out,
+        "telemt_desync_frames_bucket_total{{bucket=\"3_10\"}} {}",
+        stats.get_desync_frames_bucket_3_10()
+    );
+    let _ = writeln!(
+        out,
+        "telemt_desync_frames_bucket_total{{bucket=\"gt_10\"}} {}",
+        stats.get_desync_frames_bucket_gt_10()
+    );
+
     let _ = writeln!(out, "# HELP telemt_user_connections_total Per-user total connections");
     let _ = writeln!(out, "# TYPE telemt_user_connections_total counter");
     let _ = writeln!(out, "# HELP telemt_user_connections_current Per-user active connections");

src/proxy/handshake.rs

@@ -2,6 +2,7 @@
 
 use std::net::SocketAddr;
 use std::sync::Arc;
+use std::time::Duration;
 use tokio::io::{AsyncRead, AsyncWrite, AsyncWriteExt};
 use tracing::{debug, warn, trace, info};
 use zeroize::Zeroize;
@@ -108,11 +109,23 @@ where
 
     let cached = if config.censorship.tls_emulation {
         if let Some(cache) = tls_cache.as_ref() {
-            if let Some(sni) = tls::extract_sni_from_client_hello(handshake) {
+            let selected_domain = if let Some(sni) = tls::extract_sni_from_client_hello(handshake) {
-                Some(cache.get(&sni).await)
+                if cache.contains_domain(&sni).await {
+                    sni
+                } else {
+                    config.censorship.tls_domain.clone()
+                }
             } else {
-                Some(cache.get(&config.censorship.tls_domain).await)
+                config.censorship.tls_domain.clone()
-            }
+            };
+            let cached_entry = cache.get(&selected_domain).await;
+            let use_full_cert_payload = cache
+                .take_full_cert_budget_for_ip(
+                    peer.ip(),
+                    Duration::from_secs(config.censorship.tls_full_cert_ttl_secs),
+                )
+                .await;
+            Some((cached_entry, use_full_cert_payload))
         } else {
             None
         }
@@ -137,12 +150,13 @@ where
         None
     };
 
-    let response = if let Some(cached_entry) = cached {
+    let response = if let Some((cached_entry, use_full_cert_payload)) = cached {
         emulator::build_emulated_server_hello(
             secret,
             &validation.digest,
             &validation.session_id,
             &cached_entry,
+            use_full_cert_payload,
             rng,
             selected_alpn.clone(),
             config.censorship.tls_new_session_tickets,

src/proxy/middle_relay.rs

@@ -1,5 +1,10 @@
-use std::net::SocketAddr;
+use std::collections::HashMap;
-use std::sync::Arc;
+use std::collections::hash_map::DefaultHasher;
+use std::hash::{Hash, Hasher};
+use std::net::{IpAddr, SocketAddr};
+use std::sync::atomic::{AtomicU64, Ordering};
+use std::sync::{Arc, Mutex, OnceLock};
+use std::time::{Duration, Instant};
 
 use tokio::io::{AsyncRead, AsyncReadExt, AsyncWrite, AsyncWriteExt};
 use tokio::sync::{mpsc, oneshot};
@@ -19,6 +24,148 @@ enum C2MeCommand {
     Close,
 }
 
+const DESYNC_DEDUP_WINDOW: Duration = Duration::from_secs(60);
+const DESYNC_ERROR_CLASS: &str = "frame_too_large_crypto_desync";
+static DESYNC_DEDUP: OnceLock<Mutex<HashMap<u64, Instant>>> = OnceLock::new();
+
+struct RelayForensicsState {
+    trace_id: u64,
+    conn_id: u64,
+    user: String,
+    peer: SocketAddr,
+    peer_hash: u64,
+    started_at: Instant,
+    bytes_c2me: u64,
+    bytes_me2c: Arc<AtomicU64>,
+    desync_all_full: bool,
+}
+
+fn hash_value<T: Hash>(value: &T) -> u64 {
+    let mut hasher = DefaultHasher::new();
+    value.hash(&mut hasher);
+    hasher.finish()
+}
+
+fn hash_ip(ip: IpAddr) -> u64 {
+    hash_value(&ip)
+}
+
+fn should_emit_full_desync(key: u64, all_full: bool, now: Instant) -> bool {
+    if all_full {
+        return true;
+    }
+
+    let dedup = DESYNC_DEDUP.get_or_init(|| Mutex::new(HashMap::new()));
+    let mut guard = dedup.lock().expect("desync dedup mutex poisoned");
+    guard.retain(|_, seen_at| now.duration_since(*seen_at) < DESYNC_DEDUP_WINDOW);
+
+    match guard.get_mut(&key) {
+        Some(seen_at) => {
+            if now.duration_since(*seen_at) >= DESYNC_DEDUP_WINDOW {
+                *seen_at = now;
+                true
+            } else {
+                false
+            }
+        }
+        None => {
+            guard.insert(key, now);
+            true
+        }
+    }
+}
+
+fn report_desync_frame_too_large(
+    state: &RelayForensicsState,
+    proto_tag: ProtoTag,
+    frame_counter: u64,
+    max_frame: usize,
+    len: usize,
+    raw_len_bytes: Option<[u8; 4]>,
+    stats: &Stats,
+) -> ProxyError {
+    let len_buf = raw_len_bytes.unwrap_or((len as u32).to_le_bytes());
+    let looks_like_tls = raw_len_bytes
+        .map(|b| b[0] == 0x16 && b[1] == 0x03)
+        .unwrap_or(false);
+    let looks_like_http = raw_len_bytes
+        .map(|b| matches!(b[0], b'G' | b'P' | b'H' | b'C' | b'D'))
+        .unwrap_or(false);
+    let now = Instant::now();
+    let dedup_key = hash_value(&(
+        state.user.as_str(),
+        state.peer_hash,
+        proto_tag,
+        DESYNC_ERROR_CLASS,
+    ));
+    let emit_full = should_emit_full_desync(dedup_key, state.desync_all_full, now);
+    let duration_ms = state.started_at.elapsed().as_millis() as u64;
+    let bytes_me2c = state.bytes_me2c.load(Ordering::Relaxed);
+
+    stats.increment_desync_total();
+    stats.observe_desync_frames_ok(frame_counter);
+    if emit_full {
+        stats.increment_desync_full_logged();
+        warn!(
+            trace_id = format_args!("0x{:016x}", state.trace_id),
+            conn_id = state.conn_id,
+            user = %state.user,
+            peer_hash = format_args!("0x{:016x}", state.peer_hash),
+            proto = ?proto_tag,
+            mode = "middle_proxy",
+            is_tls = true,
+            duration_ms,
+            bytes_c2me = state.bytes_c2me,
+            bytes_me2c,
+            raw_len = len,
+            raw_len_hex = format_args!("0x{:08x}", len),
+            raw_bytes = format_args!(
+                "{:02x} {:02x} {:02x} {:02x}",
+                len_buf[0], len_buf[1], len_buf[2], len_buf[3]
+            ),
+            max_frame,
+            tls_like = looks_like_tls,
+            http_like = looks_like_http,
+            frames_ok = frame_counter,
+            dedup_window_secs = DESYNC_DEDUP_WINDOW.as_secs(),
+            desync_all_full = state.desync_all_full,
+            full_reason = if state.desync_all_full { "desync_all_full" } else { "first_in_dedup_window" },
+            error_class = DESYNC_ERROR_CLASS,
+            "Frame too large — crypto desync forensics"
+        );
+        debug!(
+            trace_id = format_args!("0x{:016x}", state.trace_id),
+            conn_id = state.conn_id,
+            user = %state.user,
+            peer = %state.peer,
+            "Frame too large forensic peer detail"
+        );
+    } else {
+        stats.increment_desync_suppressed();
+        debug!(
+            trace_id = format_args!("0x{:016x}", state.trace_id),
+            conn_id = state.conn_id,
+            user = %state.user,
+            peer_hash = format_args!("0x{:016x}", state.peer_hash),
+            proto = ?proto_tag,
+            duration_ms,
+            bytes_c2me = state.bytes_c2me,
+            bytes_me2c,
+            raw_len = len,
+            frames_ok = frame_counter,
+            dedup_window_secs = DESYNC_DEDUP_WINDOW.as_secs(),
+            error_class = DESYNC_ERROR_CLASS,
+            "Frame too large — crypto desync forensic suppressed"
+        );
+    }
+
+    ProxyError::Proxy(format!(
+        "Frame too large: {len} (max {max_frame}), frames_ok={frame_counter}, conn_id={}, trace_id=0x{:016x}",
+        state.conn_id,
+        state.trace_id
+    ))
+}
+
 pub(crate) async fn handle_via_middle_proxy<R, W>(
     mut crypto_reader: CryptoReader<R>,
     crypto_writer: CryptoWriter<W>,
@@ -48,14 +195,30 @@ where
     );
 
     let (conn_id, me_rx) = me_pool.registry().register().await;
+    let trace_id = conn_id;
+    let bytes_me2c = Arc::new(AtomicU64::new(0));
+    let mut forensics = RelayForensicsState {
+        trace_id,
+        conn_id,
+        user: user.clone(),
+        peer,
+        peer_hash: hash_ip(peer.ip()),
+        started_at: Instant::now(),
+        bytes_c2me: 0,
+        bytes_me2c: bytes_me2c.clone(),
+        desync_all_full: config.general.desync_all_full,
+    };
 
     stats.increment_user_connects(&user);
     stats.increment_user_curr_connects(&user);
 
     let proto_flags = proto_flags_for_tag(proto_tag, me_pool.has_proxy_tag());
     debug!(
+        trace_id = format_args!("0x{:016x}", trace_id),
         user = %user,
         conn_id,
+        peer_hash = format_args!("0x{:016x}", forensics.peer_hash),
+        desync_all_full = forensics.desync_all_full,
         proto_flags = format_args!("0x{:08x}", proto_flags),
         "ME relay started"
     );
@@ -93,22 +256,34 @@ where
     let stats_clone = stats.clone();
     let rng_clone = rng.clone();
     let user_clone = user.clone();
+    let bytes_me2c_clone = bytes_me2c.clone();
     let me_writer = tokio::spawn(async move {
         let mut writer = crypto_writer;
+        let mut frame_buf = Vec::with_capacity(16 * 1024);
         loop {
             tokio::select! {
                 msg = me_rx_task.recv() => {
                     match msg {
                         Some(MeResponse::Data { flags, data }) => {
                             trace!(conn_id, bytes = data.len(), flags, "ME->C data");
+                            bytes_me2c_clone.fetch_add(data.len() as u64, Ordering::Relaxed);
                             stats_clone.add_user_octets_to(&user_clone, data.len() as u64);
-                            write_client_payload(&mut writer, proto_tag, flags, &data, rng_clone.as_ref()).await?;
+                            write_client_payload(
+                                &mut writer,
+                                proto_tag,
+                                flags,
+                                &data,
+                                rng_clone.as_ref(),
+                                &mut frame_buf,
+                            )
+                            .await?;
 
                             // Drain all immediately queued ME responses and flush once.
                             while let Ok(next) = me_rx_task.try_recv() {
                                 match next {
                                     MeResponse::Data { flags, data } => {
                                         trace!(conn_id, bytes = data.len(), flags, "ME->C data (batched)");
+                                        bytes_me2c_clone.fetch_add(data.len() as u64, Ordering::Relaxed);
                                         stats_clone.add_user_octets_to(&user_clone, data.len() as u64);
                                         write_client_payload(
                                             &mut writer,
@@ -116,6 +291,7 @@ where
                                             flags,
                                             &data,
                                             rng_clone.as_ref(),
+                                            &mut frame_buf,
                                         ).await?;
                                     }
                                     MeResponse::Ack(confirm) => {
@@ -163,12 +339,15 @@ where
             &mut crypto_reader,
             proto_tag,
             frame_limit,
-            &user,
+            &forensics,
             &mut frame_counter,
             &stats,
         ).await {
             Ok(Some((payload, quickack))) => {
                 trace!(conn_id, bytes = payload.len(), "C->ME frame");
+                forensics.bytes_c2me = forensics
+                    .bytes_c2me
+                    .saturating_add(payload.len() as u64);
                 stats.add_user_octets_from(&user, payload.len() as u64);
                 let mut flags = proto_flags;
                 if quickack {
@@ -227,7 +406,16 @@ where
         (_, _, Err(e)) => Err(e),
     };
 
-    debug!(user = %user, conn_id, "ME relay cleanup");
+    debug!(
+        user = %user,
+        conn_id,
+        trace_id = format_args!("0x{:016x}", trace_id),
+        duration_ms = forensics.started_at.elapsed().as_millis() as u64,
+        bytes_c2me = forensics.bytes_c2me,
+        bytes_me2c = forensics.bytes_me2c.load(Ordering::Relaxed),
+        frames_ok = frame_counter,
+        "ME relay cleanup"
+    );
     me_pool.registry().unregister(conn_id).await;
     stats.decrement_user_curr_connects(&user);
     result
@@ -237,7 +425,7 @@ async fn read_client_payload<R>(
     client_reader: &mut CryptoReader<R>,
     proto_tag: ProtoTag,
     max_frame: usize,
-    user: &str,
+    forensics: &RelayForensicsState,
     frame_counter: &mut u64,
     stats: &Stats,
 ) -> Result<Option<(Vec<u8>, bool)>>
@@ -292,7 +480,9 @@ where
         }
         if len < 4 && proto_tag != ProtoTag::Abridged {
             warn!(
-                user = %user,
+                trace_id = format_args!("0x{:016x}", forensics.trace_id),
+                conn_id = forensics.conn_id,
+                user = %forensics.user,
                 len,
                 proto = ?proto_tag,
                 "Frame too small — corrupt or probe"
@@ -301,31 +491,15 @@ where
         }
 
         if len > max_frame {
-            let len_buf = raw_len_bytes.unwrap_or((len as u32).to_le_bytes());
+            return Err(report_desync_frame_too_large(
-            let looks_like_tls = raw_len_bytes
+                forensics,
-                .map(|b| b[0] == 0x16 && b[1] == 0x03)
+                proto_tag,
-                .unwrap_or(false);
+                *frame_counter,
-            let looks_like_http = raw_len_bytes
+                max_frame,
-                .map(|b| matches!(b[0], b'G' | b'P' | b'H' | b'C' | b'D'))
+                len,
-                .unwrap_or(false);
+                raw_len_bytes,
-            warn!(
+                stats,
-                user = %user,
+            ));
-                raw_len = len,
-                raw_len_hex = format_args!("0x{:08x}", len),
-                raw_bytes = format_args!(
-                    "{:02x} {:02x} {:02x} {:02x}",
-                    len_buf[0], len_buf[1], len_buf[2], len_buf[3]
-                ),
-                proto = ?proto_tag,
-                tls_like = looks_like_tls,
-                http_like = looks_like_http,
-                frames_ok = *frame_counter,
-                "Frame too large — crypto desync forensics"
-            );
-            return Err(ProxyError::Proxy(format!(
-                "Frame too large: {len} (max {max_frame}), frames_ok={}",
-                *frame_counter
-            )));
         }
 
         let secure_payload_len = if proto_tag == ProtoTag::Secure {
@@ -363,6 +537,7 @@ async fn write_client_payload<W>(
     flags: u32,
     data: &[u8],
     rng: &SecureRandom,
+    frame_buf: &mut Vec<u8>,
 ) -> Result<()>
 where
     W: AsyncWrite + Unpin + Send + 'static,
@@ -384,7 +559,8 @@ where
                 if quickack {
                     first |= 0x80;
                 }
-                let mut frame_buf = Vec::with_capacity(1 + data.len());
+                frame_buf.clear();
+                frame_buf.reserve(1 + data.len());
                 frame_buf.push(first);
                 frame_buf.extend_from_slice(data);
                 client_writer
@@ -397,7 +573,8 @@ where
                     first |= 0x80;
                 }
                 let lw = (len_words as u32).to_le_bytes();
-                let mut frame_buf = Vec::with_capacity(4 + data.len());
+                frame_buf.clear();
+                frame_buf.reserve(4 + data.len());
                 frame_buf.extend_from_slice(&[first, lw[0], lw[1], lw[2]]);
                 frame_buf.extend_from_slice(data);
                 client_writer
@@ -428,11 +605,14 @@ where
                 len_val |= 0x8000_0000;
             }
             let total = 4 + data.len() + padding_len;
-            let mut frame_buf = Vec::with_capacity(total);
+            frame_buf.clear();
+            frame_buf.reserve(total);
             frame_buf.extend_from_slice(&len_val.to_le_bytes());
             frame_buf.extend_from_slice(data);
             if padding_len > 0 {
-                frame_buf.extend_from_slice(&rng.bytes(padding_len));
+                let start = frame_buf.len();
+                frame_buf.resize(start + padding_len, 0);
+                rng.fill(&mut frame_buf[start..]);
             }
             client_writer
                 .write_all(&frame_buf)

src/stats/mod.rs

@@ -31,6 +31,13 @@ pub struct Stats {
     me_route_drop_channel_closed: AtomicU64,
     me_route_drop_queue_full: AtomicU64,
     secure_padding_invalid: AtomicU64,
+    desync_total: AtomicU64,
+    desync_full_logged: AtomicU64,
+    desync_suppressed: AtomicU64,
+    desync_frames_bucket_0: AtomicU64,
+    desync_frames_bucket_1_2: AtomicU64,
+    desync_frames_bucket_3_10: AtomicU64,
+    desync_frames_bucket_gt_10: AtomicU64,
     user_stats: DashMap<String, UserStats>,
     start_time: parking_lot::RwLock<Option<Instant>>,
 }
@@ -76,6 +83,31 @@ impl Stats {
     pub fn increment_secure_padding_invalid(&self) {
         self.secure_padding_invalid.fetch_add(1, Ordering::Relaxed);
     }
+    pub fn increment_desync_total(&self) {
+        self.desync_total.fetch_add(1, Ordering::Relaxed);
+    }
+    pub fn increment_desync_full_logged(&self) {
+        self.desync_full_logged.fetch_add(1, Ordering::Relaxed);
+    }
+    pub fn increment_desync_suppressed(&self) {
+        self.desync_suppressed.fetch_add(1, Ordering::Relaxed);
+    }
+    pub fn observe_desync_frames_ok(&self, frames_ok: u64) {
+        match frames_ok {
+            0 => {
+                self.desync_frames_bucket_0.fetch_add(1, Ordering::Relaxed);
+            }
+            1..=2 => {
+                self.desync_frames_bucket_1_2.fetch_add(1, Ordering::Relaxed);
+            }
+            3..=10 => {
+                self.desync_frames_bucket_3_10.fetch_add(1, Ordering::Relaxed);
+            }
+            _ => {
+                self.desync_frames_bucket_gt_10.fetch_add(1, Ordering::Relaxed);
+            }
+        }
+    }
     pub fn get_connects_all(&self) -> u64 { self.connects_all.load(Ordering::Relaxed) }
     pub fn get_connects_bad(&self) -> u64 { self.connects_bad.load(Ordering::Relaxed) }
     pub fn get_me_keepalive_sent(&self) -> u64 { self.me_keepalive_sent.load(Ordering::Relaxed) }
@@ -96,6 +128,27 @@ impl Stats {
     pub fn get_secure_padding_invalid(&self) -> u64 {
         self.secure_padding_invalid.load(Ordering::Relaxed)
     }
+    pub fn get_desync_total(&self) -> u64 {
+        self.desync_total.load(Ordering::Relaxed)
+    }
+    pub fn get_desync_full_logged(&self) -> u64 {
+        self.desync_full_logged.load(Ordering::Relaxed)
+    }
+    pub fn get_desync_suppressed(&self) -> u64 {
+        self.desync_suppressed.load(Ordering::Relaxed)
+    }
+    pub fn get_desync_frames_bucket_0(&self) -> u64 {
+        self.desync_frames_bucket_0.load(Ordering::Relaxed)
+    }
+    pub fn get_desync_frames_bucket_1_2(&self) -> u64 {
+        self.desync_frames_bucket_1_2.load(Ordering::Relaxed)
+    }
+    pub fn get_desync_frames_bucket_3_10(&self) -> u64 {
+        self.desync_frames_bucket_3_10.load(Ordering::Relaxed)
+    }
+    pub fn get_desync_frames_bucket_gt_10(&self) -> u64 {
+        self.desync_frames_bucket_gt_10.load(Ordering::Relaxed)
+    }
     
     pub fn increment_user_connects(&self, user: &str) {
         self.user_stats.entry(user.to_string()).or_default()
@@ -109,7 +162,22 @@ impl Stats {
     
     pub fn decrement_user_curr_connects(&self, user: &str) {
         if let Some(stats) = self.user_stats.get(user) {
-            stats.curr_connects.fetch_sub(1, Ordering::Relaxed);
+            let counter = &stats.curr_connects;
+            let mut current = counter.load(Ordering::Relaxed);
+            loop {
+                if current == 0 {
+                    break;
+                }
+                match counter.compare_exchange_weak(
+                    current,
+                    current - 1,
+                    Ordering::Relaxed,
+                    Ordering::Relaxed,
+                ) {
+                    Ok(_) => break,
+                    Err(actual) => current = actual,
+                }
+            }
         }
     }
     

src/tls_front/cache.rs

@@ -1,7 +1,8 @@
 use std::collections::HashMap;
+use std::net::IpAddr;
 use std::path::{Path, PathBuf};
 use std::sync::Arc;
-use std::time::{SystemTime, Duration};
+use std::time::{Duration, Instant, SystemTime};
 
 use tokio::sync::RwLock;
 use tokio::time::sleep;
@@ -14,6 +15,7 @@ use crate::tls_front::types::{CachedTlsData, ParsedServerHello, TlsFetchResult};
 pub struct TlsFrontCache {
     memory: RwLock<HashMap<String, Arc<CachedTlsData>>>,
     default: Arc<CachedTlsData>,
+    full_cert_sent: RwLock<HashMap<IpAddr, Instant>>,
     disk_path: PathBuf,
 }
 
@@ -31,6 +33,7 @@ impl TlsFrontCache {
         let default = Arc::new(CachedTlsData {
             server_hello_template: default_template,
             cert_info: None,
+            cert_payload: None,
             app_data_records_sizes: vec![default_len],
             total_app_data_len: default_len,
             fetched_at: SystemTime::now(),
@@ -45,6 +48,7 @@ impl TlsFrontCache {
         Self {
             memory: RwLock::new(map),
             default,
+            full_cert_sent: RwLock::new(HashMap::new()),
             disk_path: disk_path.as_ref().to_path_buf(),
         }
     }
@@ -54,6 +58,45 @@ impl TlsFrontCache {
         guard.get(sni).cloned().unwrap_or_else(|| self.default.clone())
     }
 
+    pub async fn contains_domain(&self, domain: &str) -> bool {
+        self.memory.read().await.contains_key(domain)
+    }
+
+    /// Returns true when full cert payload should be sent for client_ip
+    /// according to TTL policy.
+    pub async fn take_full_cert_budget_for_ip(
+        &self,
+        client_ip: IpAddr,
+        ttl: Duration,
+    ) -> bool {
+        if ttl.is_zero() {
+            self.full_cert_sent
+                .write()
+                .await
+                .insert(client_ip, Instant::now());
+            return true;
+        }
+
+        let now = Instant::now();
+        let mut guard = self.full_cert_sent.write().await;
+        guard.retain(|_, seen_at| now.duration_since(*seen_at) < ttl);
+
+        match guard.get_mut(&client_ip) {
+            Some(seen_at) => {
+                if now.duration_since(*seen_at) >= ttl {
+                    *seen_at = now;
+                    true
+                } else {
+                    false
+                }
+            }
+            None => {
+                guard.insert(client_ip, now);
+                true
+            }
+        }
+    }
+
     pub async fn set(&self, domain: &str, data: CachedTlsData) {
         let mut guard = self.memory.write().await;
         guard.insert(domain.to_string(), Arc::new(data));
@@ -142,6 +185,7 @@ impl TlsFrontCache {
         let data = CachedTlsData {
             server_hello_template: fetched.server_hello_parsed,
             cert_info: fetched.cert_info,
+            cert_payload: fetched.cert_payload,
             app_data_records_sizes: fetched.app_data_records_sizes.clone(),
             total_app_data_len: fetched.total_app_data_len,
             fetched_at: SystemTime::now(),
@@ -161,3 +205,50 @@ impl TlsFrontCache {
         &self.disk_path
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[tokio::test]
+    async fn test_take_full_cert_budget_for_ip_uses_ttl() {
+        let cache = TlsFrontCache::new(
+            &["example.com".to_string()],
+            1024,
+            "tlsfront-test-cache",
+        );
+        let ip: IpAddr = "127.0.0.1".parse().expect("ip");
+        let ttl = Duration::from_millis(80);
+
+        assert!(cache
+            .take_full_cert_budget_for_ip(ip, ttl)
+            .await);
+        assert!(!cache
+            .take_full_cert_budget_for_ip(ip, ttl)
+            .await);
+
+        tokio::time::sleep(Duration::from_millis(90)).await;
+
+        assert!(cache
+            .take_full_cert_budget_for_ip(ip, ttl)
+            .await);
+    }
+
+    #[tokio::test]
+    async fn test_take_full_cert_budget_for_ip_zero_ttl_always_allows_full_payload() {
+        let cache = TlsFrontCache::new(
+            &["example.com".to_string()],
+            1024,
+            "tlsfront-test-cache",
+        );
+        let ip: IpAddr = "127.0.0.1".parse().expect("ip");
+        let ttl = Duration::ZERO;
+
+        assert!(cache
+            .take_full_cert_budget_for_ip(ip, ttl)
+            .await);
+        assert!(cache
+            .take_full_cert_budget_for_ip(ip, ttl)
+            .await);
+    }
+}

src/tls_front/emulator.rs

@@ -3,7 +3,7 @@ use crate::protocol::constants::{
     TLS_RECORD_APPLICATION, TLS_RECORD_CHANGE_CIPHER, TLS_RECORD_HANDSHAKE, TLS_VERSION,
 };
 use crate::protocol::tls::{TLS_DIGEST_LEN, TLS_DIGEST_POS, gen_fake_x25519_key};
-use crate::tls_front::types::CachedTlsData;
+use crate::tls_front::types::{CachedTlsData, ParsedCertificateInfo};
 
 const MIN_APP_DATA: usize = 64;
 const MAX_APP_DATA: usize = 16640; // RFC 8446 §5.2 allows up to 2^14 + 256
@@ -27,12 +27,81 @@ fn jitter_and_clamp_sizes(sizes: &[usize], rng: &SecureRandom) -> Vec<usize> {
         .collect()
 }
 
+fn app_data_body_capacity(sizes: &[usize]) -> usize {
+    sizes.iter().map(|&size| size.saturating_sub(17)).sum()
+}
+
+fn ensure_payload_capacity(mut sizes: Vec<usize>, payload_len: usize) -> Vec<usize> {
+    if payload_len == 0 {
+        return sizes;
+    }
+
+    let mut body_total = app_data_body_capacity(&sizes);
+    if body_total >= payload_len {
+        return sizes;
+    }
+
+    if let Some(last) = sizes.last_mut() {
+        let free = MAX_APP_DATA.saturating_sub(*last);
+        let grow = free.min(payload_len - body_total);
+        *last += grow;
+        body_total += grow;
+    }
+
+    while body_total < payload_len {
+        let remaining = payload_len - body_total;
+        let chunk = (remaining + 17).min(MAX_APP_DATA).max(MIN_APP_DATA);
+        sizes.push(chunk);
+        body_total += chunk.saturating_sub(17);
+    }
+
+    sizes
+}
+
+fn build_compact_cert_info_payload(cert_info: &ParsedCertificateInfo) -> Option<Vec<u8>> {
+    let mut fields = Vec::new();
+
+    if let Some(subject) = cert_info.subject_cn.as_deref() {
+        fields.push(format!("CN={subject}"));
+    }
+    if let Some(issuer) = cert_info.issuer_cn.as_deref() {
+        fields.push(format!("ISSUER={issuer}"));
+    }
+    if let Some(not_before) = cert_info.not_before_unix {
+        fields.push(format!("NB={not_before}"));
+    }
+    if let Some(not_after) = cert_info.not_after_unix {
+        fields.push(format!("NA={not_after}"));
+    }
+    if !cert_info.san_names.is_empty() {
+        let san = cert_info
+            .san_names
+            .iter()
+            .take(8)
+            .map(String::as_str)
+            .collect::<Vec<_>>()
+            .join(",");
+        fields.push(format!("SAN={san}"));
+    }
+
+    if fields.is_empty() {
+        return None;
+    }
+
+    let mut payload = fields.join(";").into_bytes();
+    if payload.len() > 512 {
+        payload.truncate(512);
+    }
+    Some(payload)
+}
+
 /// Build a ServerHello + CCS + ApplicationData sequence using cached TLS metadata.
 pub fn build_emulated_server_hello(
     secret: &[u8],
     client_digest: &[u8; TLS_DIGEST_LEN],
     session_id: &[u8],
     cached: &CachedTlsData,
+    use_full_cert_payload: bool,
     rng: &SecureRandom,
     alpn: Option<Vec<u8>>,
     new_session_tickets: u8,
@@ -109,21 +178,60 @@ pub fn build_emulated_server_hello(
     if sizes.is_empty() {
         sizes.push(cached.total_app_data_len.max(1024));
     }
-    let sizes = jitter_and_clamp_sizes(&sizes, rng);
+    let mut sizes = jitter_and_clamp_sizes(&sizes, rng);
+    let compact_payload = cached
+        .cert_info
+        .as_ref()
+        .and_then(build_compact_cert_info_payload);
+    let selected_payload: Option<&[u8]> = if use_full_cert_payload {
+        cached
+            .cert_payload
+            .as_ref()
+            .map(|payload| payload.certificate_message.as_slice())
+            .filter(|payload| !payload.is_empty())
+            .or_else(|| compact_payload.as_deref())
+    } else {
+        compact_payload.as_deref()
+    };
+
+    if let Some(payload) = selected_payload {
+        sizes = ensure_payload_capacity(sizes, payload.len());
+    }
 
     let mut app_data = Vec::new();
+    let mut payload_offset = 0usize;
     for size in sizes {
         let mut rec = Vec::with_capacity(5 + size);
         rec.push(TLS_RECORD_APPLICATION);
         rec.extend_from_slice(&TLS_VERSION);
         rec.extend_from_slice(&(size as u16).to_be_bytes());
-        if size > 17 {
+
-            let body_len = size - 17;
+        if let Some(payload) = selected_payload {
-            rec.extend_from_slice(&rng.bytes(body_len));
+            if size > 17 {
-            rec.push(0x16); // inner content type marker (handshake)
+                let body_len = size - 17;
-            rec.extend_from_slice(&rng.bytes(16)); // AEAD-like tag
+                let remaining = payload.len().saturating_sub(payload_offset);
+                let copy_len = remaining.min(body_len);
+                if copy_len > 0 {
+                    rec.extend_from_slice(&payload[payload_offset..payload_offset + copy_len]);
+                    payload_offset += copy_len;
+                }
+                if body_len > copy_len {
+                    rec.extend_from_slice(&rng.bytes(body_len - copy_len));
+                }
+                rec.push(0x16); // inner content type marker (handshake)
+                rec.extend_from_slice(&rng.bytes(16)); // AEAD-like tag
+            } else {
+                rec.extend_from_slice(&rng.bytes(size));
+            }
         } else {
-            rec.extend_from_slice(&rng.bytes(size));
+            if size > 17 {
+                let body_len = size - 17;
+                rec.extend_from_slice(&rng.bytes(body_len));
+                rec.push(0x16); // inner content type marker (handshake)
+                rec.extend_from_slice(&rng.bytes(16)); // AEAD-like tag
+            } else {
+                rec.extend_from_slice(&rng.bytes(size));
+            }
         }
         app_data.extend_from_slice(&rec);
     }
@@ -158,3 +266,125 @@ pub fn build_emulated_server_hello(
 
     response
 }
+
+#[cfg(test)]
+mod tests {
+    use std::time::SystemTime;
+
+    use crate::tls_front::types::{CachedTlsData, ParsedServerHello, TlsCertPayload};
+
+    use super::build_emulated_server_hello;
+    use crate::crypto::SecureRandom;
+    use crate::protocol::constants::{
+        TLS_RECORD_APPLICATION, TLS_RECORD_CHANGE_CIPHER, TLS_RECORD_HANDSHAKE,
+    };
+
+    fn first_app_data_payload(response: &[u8]) -> &[u8] {
+        let hello_len = u16::from_be_bytes([response[3], response[4]]) as usize;
+        let ccs_start = 5 + hello_len;
+        let ccs_len = u16::from_be_bytes([response[ccs_start + 3], response[ccs_start + 4]]) as usize;
+        let app_start = ccs_start + 5 + ccs_len;
+        let app_len = u16::from_be_bytes([response[app_start + 3], response[app_start + 4]]) as usize;
+        &response[app_start + 5..app_start + 5 + app_len]
+    }
+
+    fn make_cached(cert_payload: Option<TlsCertPayload>) -> CachedTlsData {
+        CachedTlsData {
+            server_hello_template: ParsedServerHello {
+                version: [0x03, 0x03],
+                random: [0u8; 32],
+                session_id: Vec::new(),
+                cipher_suite: [0x13, 0x01],
+                compression: 0,
+                extensions: Vec::new(),
+            },
+            cert_info: None,
+            cert_payload,
+            app_data_records_sizes: vec![64],
+            total_app_data_len: 64,
+            fetched_at: SystemTime::now(),
+            domain: "example.com".to_string(),
+        }
+    }
+
+    #[test]
+    fn test_build_emulated_server_hello_uses_cached_cert_payload() {
+        let cert_msg = vec![0x0b, 0x00, 0x00, 0x05, 0x00, 0xaa, 0xbb, 0xcc, 0xdd];
+        let cached = make_cached(Some(TlsCertPayload {
+            cert_chain_der: vec![vec![0x30, 0x01, 0x00]],
+            certificate_message: cert_msg.clone(),
+        }));
+        let rng = SecureRandom::new();
+        let response = build_emulated_server_hello(
+            b"secret",
+            &[0x11; 32],
+            &[0x22; 16],
+            &cached,
+            true,
+            &rng,
+            None,
+            0,
+        );
+
+        assert_eq!(response[0], TLS_RECORD_HANDSHAKE);
+        let hello_len = u16::from_be_bytes([response[3], response[4]]) as usize;
+        let ccs_start = 5 + hello_len;
+        assert_eq!(response[ccs_start], TLS_RECORD_CHANGE_CIPHER);
+        let app_start = ccs_start + 6;
+        assert_eq!(response[app_start], TLS_RECORD_APPLICATION);
+
+        let payload = first_app_data_payload(&response);
+        assert!(payload.starts_with(&cert_msg));
+    }
+
+    #[test]
+    fn test_build_emulated_server_hello_random_fallback_when_no_cert_payload() {
+        let cached = make_cached(None);
+        let rng = SecureRandom::new();
+        let response = build_emulated_server_hello(
+            b"secret",
+            &[0x22; 32],
+            &[0x33; 16],
+            &cached,
+            true,
+            &rng,
+            None,
+            0,
+        );
+
+        let payload = first_app_data_payload(&response);
+        assert!(payload.len() >= 64);
+        assert_eq!(payload[payload.len() - 17], 0x16);
+    }
+
+    #[test]
+    fn test_build_emulated_server_hello_uses_compact_payload_after_first() {
+        let cert_msg = vec![0x0b, 0x00, 0x00, 0x05, 0x00, 0xaa, 0xbb, 0xcc, 0xdd];
+        let mut cached = make_cached(Some(TlsCertPayload {
+            cert_chain_der: vec![vec![0x30, 0x01, 0x00]],
+            certificate_message: cert_msg,
+        }));
+        cached.cert_info = Some(crate::tls_front::types::ParsedCertificateInfo {
+            not_after_unix: Some(1_900_000_000),
+            not_before_unix: Some(1_700_000_000),
+            issuer_cn: Some("Issuer".to_string()),
+            subject_cn: Some("example.com".to_string()),
+            san_names: vec!["example.com".to_string(), "www.example.com".to_string()],
+        });
+
+        let rng = SecureRandom::new();
+        let response = build_emulated_server_hello(
+            b"secret",
+            &[0x44; 32],
+            &[0x55; 16],
+            &cached,
+            false,
+            &rng,
+            None,
+            0,
+        );
+
+        let payload = first_app_data_payload(&response);
+        assert!(payload.starts_with(b"CN=example.com"));
+    }
+}

src/tls_front/fetcher.rs

@@ -1,7 +1,7 @@
 use std::sync::Arc;
 use std::time::Duration;
 
-use anyhow::{Context, Result, anyhow};
+use anyhow::{Result, anyhow};
 use tokio::io::{AsyncReadExt, AsyncWriteExt};
 use tokio::net::TcpStream;
 use tokio::time::timeout;
@@ -19,7 +19,13 @@ use x509_parser::certificate::X509Certificate;
 
 use crate::crypto::SecureRandom;
 use crate::protocol::constants::{TLS_RECORD_APPLICATION, TLS_RECORD_HANDSHAKE};
-use crate::tls_front::types::{ParsedServerHello, TlsExtension, TlsFetchResult, ParsedCertificateInfo};
+use crate::tls_front::types::{
+    ParsedCertificateInfo,
+    ParsedServerHello,
+    TlsCertPayload,
+    TlsExtension,
+    TlsFetchResult,
+};
 
 /// No-op verifier: accept any certificate (we only need lengths and metadata).
 #[derive(Debug)]
@@ -315,6 +321,46 @@ fn parse_cert_info(certs: &[CertificateDer<'static>]) -> Option<ParsedCertificat
     })
 }
 
+fn u24_bytes(value: usize) -> Option<[u8; 3]> {
+    if value > 0x00ff_ffff {
+        return None;
+    }
+    Some([
+        ((value >> 16) & 0xff) as u8,
+        ((value >> 8) & 0xff) as u8,
+        (value & 0xff) as u8,
+    ])
+}
+
+fn encode_tls13_certificate_message(cert_chain_der: &[Vec<u8>]) -> Option<Vec<u8>> {
+    if cert_chain_der.is_empty() {
+        return None;
+    }
+
+    let mut certificate_list = Vec::new();
+    for cert in cert_chain_der {
+        if cert.is_empty() {
+            return None;
+        }
+        certificate_list.extend_from_slice(&u24_bytes(cert.len())?);
+        certificate_list.extend_from_slice(cert);
+        certificate_list.extend_from_slice(&0u16.to_be_bytes()); // cert_entry extensions
+    }
+
+    // Certificate = context_len(1) + certificate_list_len(3) + entries
+    let body_len = 1usize
+        .checked_add(3)?
+        .checked_add(certificate_list.len())?;
+
+    let mut message = Vec::with_capacity(4 + body_len);
+    message.push(0x0b); // HandshakeType::certificate
+    message.extend_from_slice(&u24_bytes(body_len)?);
+    message.push(0x00); // certificate_request_context length
+    message.extend_from_slice(&u24_bytes(certificate_list.len())?);
+    message.extend_from_slice(&certificate_list);
+    Some(message)
+}
+
 async fn fetch_via_raw_tls(
     host: &str,
     port: u16,
@@ -368,26 +414,18 @@ async fn fetch_via_raw_tls(
         },
         total_app_data_len,
         cert_info: None,
+        cert_payload: None,
     })
 }
 
-/// Fetch real TLS metadata for the given SNI: negotiated cipher and cert lengths.
+async fn fetch_via_rustls(
-pub async fn fetch_real_tls(
     host: &str,
     port: u16,
     sni: &str,
     connect_timeout: Duration,
     upstream: Option<std::sync::Arc<crate::transport::UpstreamManager>>,
 ) -> Result<TlsFetchResult> {
-    // Preferred path: raw TLS probe for accurate record sizing
+    // rustls handshake path for certificate and basic negotiated metadata.
-    match fetch_via_raw_tls(host, port, sni, connect_timeout).await {
-        Ok(res) => return Ok(res),
-        Err(e) => {
-            warn!(sni = %sni, error = %e, "Raw TLS fetch failed, falling back to rustls");
-        }
-    }
-
-    // Fallback: rustls handshake to at least get certificate sizes
     let stream = if let Some(manager) = upstream {
         // Resolve host to SocketAddr
         if let Ok(mut addrs) = tokio::net::lookup_host((host, port)).await {
@@ -429,8 +467,19 @@ pub async fn fetch_real_tls(
         .peer_certificates()
         .map(|slice| slice.to_vec())
         .unwrap_or_default();
+    let cert_chain_der: Vec<Vec<u8>> = certs.iter().map(|c| c.as_ref().to_vec()).collect();
+    let cert_payload = encode_tls13_certificate_message(&cert_chain_der).map(|certificate_message| {
+        TlsCertPayload {
+            cert_chain_der: cert_chain_der.clone(),
+            certificate_message,
+        }
+    });
 
-    let total_cert_len: usize = certs.iter().map(|c| c.len()).sum::<usize>().max(1024);
+    let total_cert_len = cert_payload
+        .as_ref()
+        .map(|payload| payload.certificate_message.len())
+        .unwrap_or_else(|| cert_chain_der.iter().map(Vec::len).sum::<usize>())
+        .max(1024);
     let cert_info = parse_cert_info(&certs);
 
     // Heuristic: split across two records if large to mimic real servers a bit.
@@ -453,6 +502,7 @@ pub async fn fetch_real_tls(
         sni = %sni,
         len = total_cert_len,
         cipher = format!("0x{:04x}", u16::from_be_bytes(cipher_suite)),
+        has_cert_payload = cert_payload.is_some(),
         "Fetched TLS metadata via rustls"
     );
 
@@ -461,5 +511,81 @@ pub async fn fetch_real_tls(
         app_data_records_sizes: app_data_records_sizes.clone(),
         total_app_data_len: app_data_records_sizes.iter().sum(),
         cert_info,
+        cert_payload,
     })
 }
+
+/// Fetch real TLS metadata for the given SNI.
+///
+/// Strategy:
+/// 1) Probe raw TLS for realistic ServerHello and ApplicationData record sizes.
+/// 2) Fetch certificate chain via rustls to build cert payload.
+/// 3) Merge both when possible; otherwise auto-fallback to whichever succeeded.
+pub async fn fetch_real_tls(
+    host: &str,
+    port: u16,
+    sni: &str,
+    connect_timeout: Duration,
+    upstream: Option<std::sync::Arc<crate::transport::UpstreamManager>>,
+) -> Result<TlsFetchResult> {
+    let raw_result = match fetch_via_raw_tls(host, port, sni, connect_timeout).await {
+        Ok(res) => Some(res),
+        Err(e) => {
+            warn!(sni = %sni, error = %e, "Raw TLS fetch failed");
+            None
+        }
+    };
+
+    match fetch_via_rustls(host, port, sni, connect_timeout, upstream).await {
+        Ok(rustls_result) => {
+            if let Some(mut raw) = raw_result {
+                raw.cert_info = rustls_result.cert_info;
+                raw.cert_payload = rustls_result.cert_payload;
+                debug!(sni = %sni, "Fetched TLS metadata via raw probe + rustls cert chain");
+                Ok(raw)
+            } else {
+                Ok(rustls_result)
+            }
+        }
+        Err(e) => {
+            if let Some(raw) = raw_result {
+                warn!(sni = %sni, error = %e, "Rustls cert fetch failed, using raw TLS metadata only");
+                Ok(raw)
+            } else {
+                Err(e)
+            }
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::encode_tls13_certificate_message;
+
+    fn read_u24(bytes: &[u8]) -> usize {
+        ((bytes[0] as usize) << 16) | ((bytes[1] as usize) << 8) | (bytes[2] as usize)
+    }
+
+    #[test]
+    fn test_encode_tls13_certificate_message_single_cert() {
+        let cert = vec![0x30, 0x03, 0x02, 0x01, 0x01];
+        let message = encode_tls13_certificate_message(&[cert.clone()]).expect("message");
+
+        assert_eq!(message[0], 0x0b);
+        assert_eq!(read_u24(&message[1..4]), message.len() - 4);
+        assert_eq!(message[4], 0x00);
+
+        let cert_list_len = read_u24(&message[5..8]);
+        assert_eq!(cert_list_len, cert.len() + 5);
+
+        let cert_len = read_u24(&message[8..11]);
+        assert_eq!(cert_len, cert.len());
+        assert_eq!(&message[11..11 + cert.len()], cert.as_slice());
+        assert_eq!(&message[11 + cert.len()..13 + cert.len()], &[0x00, 0x00]);
+    }
+
+    #[test]
+    fn test_encode_tls13_certificate_message_empty_chain() {
+        assert!(encode_tls13_certificate_message(&[]).is_none());
+    }
+}

src/tls_front/types.rs

@@ -29,11 +29,23 @@ pub struct ParsedCertificateInfo {
     pub san_names: Vec<String>,
 }
 
+/// TLS certificate payload captured from profiled upstream.
+///
+/// `certificate_message` stores an encoded TLS 1.3 Certificate handshake
+/// message body that can be replayed as opaque ApplicationData bytes in FakeTLS.
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct TlsCertPayload {
+    pub cert_chain_der: Vec<Vec<u8>>,
+    pub certificate_message: Vec<u8>,
+}
+
 /// Cached data per SNI used by the emulator.
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct CachedTlsData {
     pub server_hello_template: ParsedServerHello,
     pub cert_info: Option<ParsedCertificateInfo>,
+    #[serde(default)]
+    pub cert_payload: Option<TlsCertPayload>,
     pub app_data_records_sizes: Vec<usize>,
     pub total_app_data_len: usize,
     #[serde(default = "now_system_time", skip_serializing, skip_deserializing)]
@@ -52,4 +64,5 @@ pub struct TlsFetchResult {
     pub app_data_records_sizes: Vec<usize>,
     pub total_app_data_len: usize,
     pub cert_info: Option<ParsedCertificateInfo>,
+    pub cert_payload: Option<TlsCertPayload>,
 }

src/transport/middle_proxy/codec.rs

@@ -223,7 +223,7 @@ pub(crate) struct RpcWriter {
 impl RpcWriter {
     pub(crate) async fn send(&mut self, payload: &[u8]) -> Result<()> {
         let frame = build_rpc_frame(self.seq_no, payload, self.crc_mode);
-        self.seq_no += 1;
+        self.seq_no = self.seq_no.wrapping_add(1);
 
         let pad = (16 - (frame.len() % 16)) % 16;
         let mut buf = frame;

src/transport/middle_proxy/config_updater.rs

@@ -4,8 +4,10 @@ use std::sync::Arc;
 use std::time::Duration;
 
 use httpdate;
+use tokio::sync::watch;
 use tracing::{debug, info, warn};
 
+use crate::config::ProxyConfig;
 use crate::error::Result;
 
 use super::MePool;
@@ -128,49 +130,126 @@ pub async fn fetch_proxy_config(url: &str) -> Result<ProxyConfigData> {
     Ok(ProxyConfigData { map, default_dc })
 }
 
-pub async fn me_config_updater(pool: Arc<MePool>, rng: Arc<SecureRandom>, interval: Duration) {
+async fn run_update_cycle(pool: &Arc<MePool>, rng: &Arc<SecureRandom>, cfg: &ProxyConfig) {
-    let mut tick = tokio::time::interval(interval);
+    let mut maps_changed = false;
-    // skip immediate tick to avoid double-fetch right after startup
+
-    tick.tick().await;
+    // Update proxy config v4
+    let cfg_v4 = retry_fetch("https://core.telegram.org/getProxyConfig").await;
+    if let Some(cfg_v4) = cfg_v4 {
+        let changed = pool.update_proxy_maps(cfg_v4.map.clone(), None).await;
+        if let Some(dc) = cfg_v4.default_dc {
+            pool.default_dc
+                .store(dc, std::sync::atomic::Ordering::Relaxed);
+        }
+        if changed {
+            maps_changed = true;
+            info!("ME config updated (v4)");
+        } else {
+            debug!("ME config v4 unchanged");
+        }
+    }
+
+    // Update proxy config v6 (optional)
+    let cfg_v6 = retry_fetch("https://core.telegram.org/getProxyConfigV6").await;
+    if let Some(cfg_v6) = cfg_v6 {
+        let changed = pool.update_proxy_maps(HashMap::new(), Some(cfg_v6.map)).await;
+        if changed {
+            maps_changed = true;
+            info!("ME config updated (v6)");
+        } else {
+            debug!("ME config v6 unchanged");
+        }
+    }
+
+    if maps_changed {
+        let drain_timeout = if cfg.general.me_reinit_drain_timeout_secs == 0 {
+            None
+        } else {
+            Some(Duration::from_secs(cfg.general.me_reinit_drain_timeout_secs))
+        };
+        pool.zero_downtime_reinit_after_map_change(rng.as_ref(), drain_timeout)
+            .await;
+    }
+
+    pool.reset_stun_state();
+
+    // Update proxy-secret
+    match download_proxy_secret().await {
+        Ok(secret) => {
+            if pool.update_secret(secret).await {
+                info!("proxy-secret updated and pool reconnect scheduled");
+            }
+        }
+        Err(e) => warn!(error = %e, "proxy-secret update failed"),
+    }
+}
+
+pub async fn me_config_updater(
+    pool: Arc<MePool>,
+    rng: Arc<SecureRandom>,
+    mut config_rx: watch::Receiver<Arc<ProxyConfig>>,
+) {
+    let mut update_every_secs = config_rx
+        .borrow()
+        .general
+        .effective_update_every_secs()
+        .max(1);
+    let mut update_every = Duration::from_secs(update_every_secs);
+    let mut next_tick = tokio::time::Instant::now() + update_every;
+    info!(update_every_secs, "ME config updater started");
+
     loop {
-        tick.tick().await;
+        let sleep = tokio::time::sleep_until(next_tick);
+        tokio::pin!(sleep);
 
-        // Update proxy config v4
+        tokio::select! {
-        let cfg_v4 = retry_fetch("https://core.telegram.org/getProxyConfig").await;
+            _ = &mut sleep => {
-        if let Some(cfg) = cfg_v4 {
+                let cfg = config_rx.borrow().clone();
-            let changed = pool.update_proxy_maps(cfg.map.clone(), None).await;
+                run_update_cycle(&pool, &rng, cfg.as_ref()).await;
-            if let Some(dc) = cfg.default_dc {
+                let refreshed_secs = cfg.general.effective_update_every_secs().max(1);
-                pool.default_dc.store(dc, std::sync::atomic::Ordering::Relaxed);
+                if refreshed_secs != update_every_secs {
+                    info!(
+                        old_update_every_secs = update_every_secs,
+                        new_update_every_secs = refreshed_secs,
+                        "ME config updater interval changed"
+                    );
+                    update_every_secs = refreshed_secs;
+                    update_every = Duration::from_secs(update_every_secs);
+                }
+                next_tick = tokio::time::Instant::now() + update_every;
             }
-            if changed {
+            changed = config_rx.changed() => {
-                info!("ME config updated (v4), reconciling connections");
+                if changed.is_err() {
-                pool.reconcile_connections(&rng).await;
+                    warn!("ME config updater stopped: config channel closed");
-            } else {
+                    break;
-                debug!("ME config v4 unchanged");
+                }
-            }
+                let cfg = config_rx.borrow().clone();
-        }
+                let new_secs = cfg.general.effective_update_every_secs().max(1);
+                if new_secs == update_every_secs {
+                    continue;
+                }
 
-        // Update proxy config v6 (optional)
+                if new_secs < update_every_secs {
-        let cfg_v6 = retry_fetch("https://core.telegram.org/getProxyConfigV6").await;
+                    info!(
-        if let Some(cfg_v6) = cfg_v6 {
+                        old_update_every_secs = update_every_secs,
-            let changed = pool.update_proxy_maps(HashMap::new(), Some(cfg_v6.map)).await;
+                        new_update_every_secs = new_secs,
-            if changed {
+                        "ME config updater interval decreased, running immediate refresh"
-                info!("ME config updated (v6), reconciling connections");
+                    );
-                pool.reconcile_connections(&rng).await;
+                    update_every_secs = new_secs;
-            } else {
+                    update_every = Duration::from_secs(update_every_secs);
-                debug!("ME config v6 unchanged");
+                    run_update_cycle(&pool, &rng, cfg.as_ref()).await;
-            }
+                    next_tick = tokio::time::Instant::now() + update_every;
-        }
+                } else {
-        pool.reset_stun_state();
+                    info!(
-
+                        old_update_every_secs = update_every_secs,
-        // Update proxy-secret
+                        new_update_every_secs = new_secs,
-        match download_proxy_secret().await {
+                        "ME config updater interval increased"
-            Ok(secret) => {
+                    );
-                if pool.update_secret(secret).await {
+                    update_every_secs = new_secs;
-                    info!("proxy-secret updated and pool reconnect scheduled");
+                    update_every = Duration::from_secs(update_every_secs);
+                    next_tick = tokio::time::Instant::now() + update_every;
                 }
             }
-            Err(e) => warn!(error = %e, "proxy-secret update failed"),
         }
     }
 }

src/transport/middle_proxy/pool.rs

@@ -1,4 +1,4 @@
-use std::collections::HashMap;
+use std::collections::{HashMap, HashSet};
 use std::net::{IpAddr, Ipv6Addr, SocketAddr};
 use std::sync::Arc;
 use std::sync::atomic::{AtomicBool, AtomicI32, AtomicU64, AtomicUsize, Ordering};
@@ -178,7 +178,6 @@ impl MePool {
     }
 
     pub async fn reconcile_connections(self: &Arc<Self>, rng: &SecureRandom) {
-        use std::collections::HashSet;
         let writers = self.writers.read().await;
         let current: HashSet<SocketAddr> = writers
             .iter()
@@ -210,6 +209,103 @@ impl MePool {
         }
     }
 
+    async fn desired_dc_endpoints(&self) -> HashMap<i32, HashSet<SocketAddr>> {
+        let mut out: HashMap<i32, HashSet<SocketAddr>> = HashMap::new();
+
+        if self.decision.ipv4_me {
+            let map_v4 = self.proxy_map_v4.read().await.clone();
+            for (dc, addrs) in map_v4 {
+                let entry = out.entry(dc.abs()).or_default();
+                for (ip, port) in addrs {
+                    entry.insert(SocketAddr::new(ip, port));
+                }
+            }
+        }
+
+        if self.decision.ipv6_me {
+            let map_v6 = self.proxy_map_v6.read().await.clone();
+            for (dc, addrs) in map_v6 {
+                let entry = out.entry(dc.abs()).or_default();
+                for (ip, port) in addrs {
+                    entry.insert(SocketAddr::new(ip, port));
+                }
+            }
+        }
+
+        out
+    }
+
+    pub async fn zero_downtime_reinit_after_map_change(
+        self: &Arc<Self>,
+        rng: &SecureRandom,
+        drain_timeout: Option<Duration>,
+    ) {
+        // Stage 1: prewarm writers for new endpoint maps before draining old ones.
+        self.reconcile_connections(rng).await;
+
+        let desired_by_dc = self.desired_dc_endpoints().await;
+        if desired_by_dc.is_empty() {
+            warn!("ME endpoint map is empty after update; skipping stale writer drain");
+            return;
+        }
+
+        let writers = self.writers.read().await;
+        let active_writer_addrs: HashSet<SocketAddr> = writers
+            .iter()
+            .filter(|w| !w.draining.load(Ordering::Relaxed))
+            .map(|w| w.addr)
+            .collect();
+
+        let mut missing_dc = Vec::<i32>::new();
+        for (dc, endpoints) in &desired_by_dc {
+            if endpoints.is_empty() {
+                continue;
+            }
+            if !endpoints.iter().any(|addr| active_writer_addrs.contains(addr)) {
+                missing_dc.push(*dc);
+            }
+        }
+
+        if !missing_dc.is_empty() {
+            missing_dc.sort_unstable();
+            warn!(
+                missing_dc = ?missing_dc,
+                // Keep stale writers alive when fresh coverage is incomplete.
+                "ME reinit coverage incomplete after map update; keeping stale writers"
+            );
+            return;
+        }
+
+        let desired_addrs: HashSet<SocketAddr> = desired_by_dc
+            .values()
+            .flat_map(|set| set.iter().copied())
+            .collect();
+
+        let stale_writer_ids: Vec<u64> = writers
+            .iter()
+            .filter(|w| !w.draining.load(Ordering::Relaxed))
+            .filter(|w| !desired_addrs.contains(&w.addr))
+            .map(|w| w.id)
+            .collect();
+        drop(writers);
+
+        if stale_writer_ids.is_empty() {
+            debug!("ME map update completed with no stale writers");
+            return;
+        }
+
+        let drain_timeout_secs = drain_timeout.map(|d| d.as_secs()).unwrap_or(0);
+        info!(
+            stale_writers = stale_writer_ids.len(),
+            drain_timeout_secs,
+            "ME map update covered; draining stale writers"
+        );
+        for writer_id in stale_writer_ids {
+            self.mark_writer_draining_with_timeout(writer_id, drain_timeout)
+                .await;
+        }
+    }
+
     pub async fn update_proxy_maps(
         &self,
         new_v4: HashMap<i32, Vec<(IpAddr, u16)>>,
@@ -415,7 +511,6 @@ impl MePool {
         let degraded = Arc::new(AtomicBool::new(false));
         let draining = Arc::new(AtomicBool::new(false));
         let (tx, mut rx) = mpsc::channel::<WriterCommand>(4096);
-        let tx_for_keepalive = tx.clone();
         let mut rpc_writer = RpcWriter {
             writer: hs.wr,
             key: hs.write_key,
@@ -452,7 +547,7 @@ impl MePool {
         };
         self.writers.write().await.push(writer.clone());
         self.conn_count.fetch_add(1, Ordering::Relaxed);
-        self.writer_available.notify_waiters();
+        self.writer_available.notify_one();
 
         let reg = self.registry.clone();
         let writers_arc = self.writers_arc();
@@ -461,7 +556,6 @@ impl MePool {
         let rtt_stats = self.rtt_stats.clone();
         let stats_reader = self.stats.clone();
         let stats_ping = self.stats.clone();
-        let stats_keepalive = self.stats.clone();
         let pool = Arc::downgrade(self);
         let cancel_ping = cancel.clone();
         let tx_ping = tx.clone();
@@ -474,7 +568,6 @@ impl MePool {
         let keepalive_jitter = self.me_keepalive_jitter;
         let cancel_reader_token = cancel.clone();
         let cancel_ping_token = cancel_ping.clone();
-        let cancel_keepalive_token = cancel.clone();
 
         tokio::spawn(async move {
             let res = reader_loop(
@@ -513,15 +606,40 @@ impl MePool {
         let pool_ping = Arc::downgrade(self);
         tokio::spawn(async move {
             let mut ping_id: i64 = rand::random::<i64>();
-            loop {
+            // Per-writer jittered start to avoid phase sync.
+            let startup_jitter = if keepalive_enabled {
+                let jitter_cap_ms = keepalive_interval.as_millis() / 2;
+                let effective_jitter_ms = keepalive_jitter.as_millis().min(jitter_cap_ms).max(1);
+                Duration::from_millis(rand::rng().random_range(0..=effective_jitter_ms as u64))
+            } else {
                 let jitter = rand::rng()
                     .random_range(-ME_ACTIVE_PING_JITTER_SECS..=ME_ACTIVE_PING_JITTER_SECS);
                 let wait = (ME_ACTIVE_PING_SECS as i64 + jitter).max(5) as u64;
+                Duration::from_secs(wait)
+            };
+            tokio::select! {
+                _ = cancel_ping_token.cancelled() => return,
+                _ = tokio::time::sleep(startup_jitter) => {}
+            }
+            loop {
+                let wait = if keepalive_enabled {
+                    let jitter_cap_ms = keepalive_interval.as_millis() / 2;
+                    let effective_jitter_ms = keepalive_jitter.as_millis().min(jitter_cap_ms).max(1);
+                    keepalive_interval
+                        + Duration::from_millis(
+                            rand::rng().random_range(0..=effective_jitter_ms as u64)
+                        )
+                } else {
+                    let jitter = rand::rng()
+                        .random_range(-ME_ACTIVE_PING_JITTER_SECS..=ME_ACTIVE_PING_JITTER_SECS);
+                    let secs = (ME_ACTIVE_PING_SECS as i64 + jitter).max(5) as u64;
+                    Duration::from_secs(secs)
+                };
                 tokio::select! {
                     _ = cancel_ping_token.cancelled() => {
                         break;
                     }
-                    _ = tokio::time::sleep(Duration::from_secs(wait)) => {}
+                    _ = tokio::time::sleep(wait) => {}
                 }
                 let sent_id = ping_id;
                 let mut p = Vec::with_capacity(12);
@@ -538,8 +656,10 @@ impl MePool {
                     tracker.insert(sent_id, (std::time::Instant::now(), writer_id));
                 }
                 ping_id = ping_id.wrapping_add(1);
+                stats_ping.increment_me_keepalive_sent();
                 if tx_ping.send(WriterCommand::DataAndFlush(p)).await.is_err() {
-                    debug!("Active ME ping failed, removing dead writer");
+                    stats_ping.increment_me_keepalive_failed();
+                    debug!("ME ping failed, removing dead writer");
                     cancel_ping.cancel();
                     if let Some(pool) = pool_ping.upgrade() {
                         if cleanup_for_ping
@@ -554,46 +674,6 @@ impl MePool {
             }
         });
 
-        if keepalive_enabled {
-            let tx_keepalive = tx_for_keepalive;
-            let cancel_keepalive = cancel_keepalive_token;
-            let ping_tracker_keepalive = ping_tracker.clone();
-            tokio::spawn(async move {
-                // Per-writer jittered start to avoid phase sync.
-                let jitter_cap_ms = keepalive_interval.as_millis() / 2;
-                let effective_jitter_ms = keepalive_jitter.as_millis().min(jitter_cap_ms).max(1);
-                let initial_jitter_ms = rand::rng().random_range(0..=effective_jitter_ms as u64);
-                tokio::time::sleep(Duration::from_millis(initial_jitter_ms)).await;
-                let mut ping_id: i64 = rand::random::<i64>();
-                loop {
-                    tokio::select! {
-                        _ = cancel_keepalive.cancelled() => break,
-                        _ = tokio::time::sleep(keepalive_interval + Duration::from_millis(rand::rng().random_range(0..=effective_jitter_ms as u64))) => {}
-                    }
-                    let sent_id = ping_id;
-                    ping_id = ping_id.wrapping_add(1);
-                    let mut p = Vec::with_capacity(12);
-                    p.extend_from_slice(&RPC_PING_U32.to_le_bytes());
-                    p.extend_from_slice(&sent_id.to_le_bytes());
-                    {
-                        let mut tracker = ping_tracker_keepalive.lock().await;
-                        let before = tracker.len();
-                        tracker.retain(|_, (ts, _)| ts.elapsed() < Duration::from_secs(120));
-                        let expired = before.saturating_sub(tracker.len());
-                        if expired > 0 {
-                            stats_keepalive.increment_me_keepalive_timeout_by(expired as u64);
-                        }
-                        tracker.insert(sent_id, (std::time::Instant::now(), writer_id));
-                    }
-                    stats_keepalive.increment_me_keepalive_sent();
-                    if tx_keepalive.send(WriterCommand::DataAndFlush(p)).await.is_err() {
-                        stats_keepalive.increment_me_keepalive_failed();
-                        break;
-                    }
-                }
-            });
-        }
-
         Ok(())
     }
 
@@ -630,36 +710,57 @@ impl MePool {
     }
 
     async fn remove_writer_only(&self, writer_id: u64) -> Vec<BoundConn> {
+        let mut close_tx: Option<mpsc::Sender<WriterCommand>> = None;
         {
             let mut ws = self.writers.write().await;
             if let Some(pos) = ws.iter().position(|w| w.id == writer_id) {
                 let w = ws.remove(pos);
                 w.cancel.cancel();
-                let _ = w.tx.send(WriterCommand::Close).await;
+                close_tx = Some(w.tx.clone());
                 self.conn_count.fetch_sub(1, Ordering::Relaxed);
             }
         }
+        if let Some(tx) = close_tx {
+            let _ = tx.send(WriterCommand::Close).await;
+        }
         self.rtt_stats.lock().await.remove(&writer_id);
         self.registry.writer_lost(writer_id).await
     }
 
-    pub(crate) async fn mark_writer_draining(self: &Arc<Self>, writer_id: u64) {
+    pub(crate) async fn mark_writer_draining_with_timeout(
-        {
+        self: &Arc<Self>,
+        writer_id: u64,
+        timeout: Option<Duration>,
+    ) {
+        let timeout = timeout.filter(|d| !d.is_zero());
+        let found = {
             let mut ws = self.writers.write().await;
             if let Some(w) = ws.iter_mut().find(|w| w.id == writer_id) {
                 w.draining.store(true, Ordering::Relaxed);
+                true
+            } else {
+                false
             }
+        };
+
+        if !found {
+            return;
         }
 
+        let timeout_secs = timeout.map(|d| d.as_secs()).unwrap_or(0);
+        debug!(writer_id, timeout_secs, "ME writer marked draining");
+
         let pool = Arc::downgrade(self);
         tokio::spawn(async move {
-            let deadline = Instant::now() + Duration::from_secs(300);
+            let deadline = timeout.map(|t| Instant::now() + t);
             loop {
                 if let Some(p) = pool.upgrade() {
-                    if Instant::now() >= deadline {
+                    if let Some(deadline_at) = deadline {
-                        warn!(writer_id, "Drain timeout, force-closing");
+                        if Instant::now() >= deadline_at {
-                        let _ = p.remove_writer_and_close_clients(writer_id).await;
+                            warn!(writer_id, "Drain timeout, force-closing");
-                        break;
+                            let _ = p.remove_writer_and_close_clients(writer_id).await;
+                            break;
+                        }
                     }
                     if p.registry.is_writer_empty(writer_id).await {
                         let _ = p.remove_writer_only(writer_id).await;
@@ -673,6 +774,11 @@ impl MePool {
         });
     }
 
+    pub(crate) async fn mark_writer_draining(self: &Arc<Self>, writer_id: u64) {
+        self.mark_writer_draining_with_timeout(writer_id, Some(Duration::from_secs(300)))
+            .await;
+    }
+
 }
 
 fn hex_dump(data: &[u8]) -> String {

src/transport/middle_proxy/registry.rs

@@ -1,6 +1,7 @@
 use std::collections::{HashMap, HashSet};
 use std::net::SocketAddr;
 use std::sync::atomic::{AtomicU64, Ordering};
+use std::time::Duration;
 
 use tokio::sync::{mpsc, RwLock};
 use tokio::sync::mpsc::error::TrySendError;
@@ -9,6 +10,7 @@ use super::codec::WriterCommand;
 use super::MeResponse;
 
 const ROUTE_CHANNEL_CAPACITY: usize = 4096;
+const ROUTE_BACKPRESSURE_TIMEOUT: Duration = Duration::from_millis(25);
 
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
 pub enum RouteResult {
@@ -94,15 +96,26 @@ impl ConnRegistry {
     }
 
     pub async fn route(&self, id: u64, resp: MeResponse) -> RouteResult {
-        let inner = self.inner.read().await;
+        let tx = {
-        if let Some(tx) = inner.map.get(&id) {
+            let inner = self.inner.read().await;
-            match tx.try_send(resp) {
+            inner.map.get(&id).cloned()
-                Ok(()) => RouteResult::Routed,
+        };
-                Err(TrySendError::Closed(_)) => RouteResult::ChannelClosed,
+
-                Err(TrySendError::Full(_)) => RouteResult::QueueFull,
+        let Some(tx) = tx else {
+            return RouteResult::NoConn;
+        };
+
+        match tx.try_send(resp) {
+            Ok(()) => RouteResult::Routed,
+            Err(TrySendError::Closed(_)) => RouteResult::ChannelClosed,
+            Err(TrySendError::Full(resp)) => {
+                // Absorb short bursts without dropping/closing the session immediately.
+                match tokio::time::timeout(ROUTE_BACKPRESSURE_TIMEOUT, tx.send(resp)).await {
+                    Ok(Ok(())) => RouteResult::Routed,
+                    Ok(Err(_)) => RouteResult::ChannelClosed,
+                    Err(_) => RouteResult::QueueFull,
+                }
             }
-        } else {
-            RouteResult::NoConn
         }
     }
 

src/transport/middle_proxy/send.rs

@@ -62,6 +62,8 @@ impl MePool {
             let mut writers_snapshot = {
                 let ws = self.writers.read().await;
                 if ws.is_empty() {
+                    // Create waiter before recovery attempts so notify_one permits are not missed.
+                    let waiter = self.writer_available.notified();
                     drop(ws);
                     for family in self.family_order() {
                         let map = match family {
@@ -72,13 +74,19 @@ impl MePool {
                             for (ip, port) in addrs {
                                 let addr = SocketAddr::new(*ip, *port);
                                 if self.connect_one(addr, self.rng.as_ref()).await.is_ok() {
-                                    self.writer_available.notify_waiters();
+                                    self.writer_available.notify_one();
                                     break;
                                 }
                             }
                         }
                     }
-                    if tokio::time::timeout(Duration::from_secs(3), self.writer_available.notified()).await.is_err() {
+                    if !self.writers.read().await.is_empty() {
+                        continue;
+                    }
+                    if tokio::time::timeout(Duration::from_secs(3), waiter).await.is_err() {
+                        if !self.writers.read().await.is_empty() {
+                            continue;
+                        }
                         return Err(ProxyError::Proxy("All ME connections dead (waited 3s)".into()));
                     }
                     continue;

src/transport/upstream.rs

@@ -394,6 +394,7 @@ impl UpstreamManager {
                 Ok(stream)
             },
             UpstreamType::Socks4 { address, interface, user_id } => {
+                let connect_timeout = Duration::from_secs(DIRECT_CONNECT_TIMEOUT_SECS);
                 // Try to parse as SocketAddr first (IP:port), otherwise treat as hostname:port
                 let mut stream = if let Ok(proxy_addr) = address.parse::<SocketAddr>() {
                     // IP:port format - use socket with optional interface binding
@@ -416,7 +417,15 @@ impl UpstreamManager {
                     let std_stream: std::net::TcpStream = socket.into();
                     let stream = TcpStream::from_std(std_stream)?;
 
-                    stream.writable().await?;
+                    match tokio::time::timeout(connect_timeout, stream.writable()).await {
+                        Ok(Ok(())) => {}
+                        Ok(Err(e)) => return Err(ProxyError::Io(e)),
+                        Err(_) => {
+                            return Err(ProxyError::ConnectionTimeout {
+                                addr: proxy_addr.to_string(),
+                            });
+                        }
+                    }
                     if let Some(e) = stream.take_error()? {
                         return Err(ProxyError::Io(e));
                     }
@@ -427,8 +436,15 @@ impl UpstreamManager {
                     if interface.is_some() {
                         warn!("SOCKS4 interface binding is not supported for hostname addresses, ignoring");
                     }
-                    TcpStream::connect(address).await
+                    match tokio::time::timeout(connect_timeout, TcpStream::connect(address)).await {
-                        .map_err(ProxyError::Io)?
+                        Ok(Ok(stream)) => stream,
+                        Ok(Err(e)) => return Err(ProxyError::Io(e)),
+                        Err(_) => {
+                            return Err(ProxyError::ConnectionTimeout {
+                                addr: address.clone(),
+                            });
+                        }
+                    }
                 };
 
                 // replace socks user_id with config.selected_scope, if set
@@ -436,10 +452,19 @@ impl UpstreamManager {
                     .filter(|s| !s.is_empty());
                 let _user_id: Option<&str> = scope.or(user_id.as_deref());
 
-                connect_socks4(&mut stream, target, _user_id).await?;
+                match tokio::time::timeout(connect_timeout, connect_socks4(&mut stream, target, _user_id)).await {
+                    Ok(Ok(())) => {}
+                    Ok(Err(e)) => return Err(e),
+                    Err(_) => {
+                        return Err(ProxyError::ConnectionTimeout {
+                            addr: target.to_string(),
+                        });
+                    }
+                }
                 Ok(stream)
             },
             UpstreamType::Socks5 { address, interface, username, password } => {
+                let connect_timeout = Duration::from_secs(DIRECT_CONNECT_TIMEOUT_SECS);
                 // Try to parse as SocketAddr first (IP:port), otherwise treat as hostname:port
                 let mut stream = if let Ok(proxy_addr) = address.parse::<SocketAddr>() {
                     // IP:port format - use socket with optional interface binding
@@ -462,7 +487,15 @@ impl UpstreamManager {
                     let std_stream: std::net::TcpStream = socket.into();
                     let stream = TcpStream::from_std(std_stream)?;
 
-                    stream.writable().await?;
+                    match tokio::time::timeout(connect_timeout, stream.writable()).await {
+                        Ok(Ok(())) => {}
+                        Ok(Err(e)) => return Err(ProxyError::Io(e)),
+                        Err(_) => {
+                            return Err(ProxyError::ConnectionTimeout {
+                                addr: proxy_addr.to_string(),
+                            });
+                        }
+                    }
                     if let Some(e) = stream.take_error()? {
                         return Err(ProxyError::Io(e));
                     }
@@ -473,8 +506,15 @@ impl UpstreamManager {
                     if interface.is_some() {
                         warn!("SOCKS5 interface binding is not supported for hostname addresses, ignoring");
                     }
-                    TcpStream::connect(address).await
+                    match tokio::time::timeout(connect_timeout, TcpStream::connect(address)).await {
-                        .map_err(ProxyError::Io)?
+                        Ok(Ok(stream)) => stream,
+                        Ok(Err(e)) => return Err(ProxyError::Io(e)),
+                        Err(_) => {
+                            return Err(ProxyError::ConnectionTimeout {
+                                addr: address.clone(),
+                            });
+                        }
+                    }
                 };
 
                 debug!(config = ?config, "Socks5 connection");
@@ -484,7 +524,20 @@ impl UpstreamManager {
                 let _username: Option<&str> = scope.or(username.as_deref());
                 let _password: Option<&str> = scope.or(password.as_deref());
 
-                connect_socks5(&mut stream, target, _username, _password).await?;
+                match tokio::time::timeout(
+                    connect_timeout,
+                    connect_socks5(&mut stream, target, _username, _password),
+                )
+                .await
+                {
+                    Ok(Ok(())) => {}
+                    Ok(Err(e)) => return Err(e),
+                    Err(_) => {
+                        return Err(ProxyError::ConnectionTimeout {
+                            addr: target.to_string(),
+                        });
+                    }
+                }
                 Ok(stream)
             },
         }

tools/tlsearch.py

@@ -0,0 +1,396 @@
+#!/usr/bin/env python3
+"""
+TLS Profile Inspector
+
+Usage:
+  python3 tools/tlsearch.py
+  python3 tools/tlsearch.py tlsfront
+  python3 tools/tlsearch.py tlsfront/petrovich.ru.json
+  python3 tools/tlsearch.py tlsfront --only-current
+"""
+
+from __future__ import annotations
+
+import argparse
+import datetime as dt
+import json
+from dataclasses import dataclass
+from pathlib import Path
+from typing import Any, Iterable
+
+
+TLS_VERSIONS = {
+    0x0301: "TLS 1.0",
+    0x0302: "TLS 1.1",
+    0x0303: "TLS 1.2",
+    0x0304: "TLS 1.3",
+}
+
+EXT_NAMES = {
+    0: "server_name",
+    5: "status_request",
+    10: "supported_groups",
+    11: "ec_point_formats",
+    13: "signature_algorithms",
+    16: "alpn",
+    18: "signed_certificate_timestamp",
+    21: "padding",
+    23: "extended_master_secret",
+    35: "session_ticket",
+    43: "supported_versions",
+    45: "psk_key_exchange_modes",
+    51: "key_share",
+}
+
+CIPHER_NAMES = {
+    0x1301: "TLS_AES_128_GCM_SHA256",
+    0x1302: "TLS_AES_256_GCM_SHA384",
+    0x1303: "TLS_CHACHA20_POLY1305_SHA256",
+    0x1304: "TLS_AES_128_CCM_SHA256",
+    0x1305: "TLS_AES_128_CCM_8_SHA256",
+    0x009C: "TLS_RSA_WITH_AES_128_GCM_SHA256",
+    0x009D: "TLS_RSA_WITH_AES_256_GCM_SHA384",
+    0xC02F: "TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256",
+    0xC030: "TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384",
+    0xCCA8: "TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256",
+    0xCCA9: "TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256",
+}
+
+NAMED_GROUPS = {
+    0x001D: "x25519",
+    0x0017: "secp256r1",
+    0x0018: "secp384r1",
+    0x0019: "secp521r1",
+    0x0100: "ffdhe2048",
+    0x0101: "ffdhe3072",
+    0x0102: "ffdhe4096",
+}
+
+
+@dataclass
+class ProfileRecognition:
+    schema: str
+    mode: str
+    has_cert_info: bool
+    has_full_cert_payload: bool
+    cert_message_len: int
+    cert_chain_count: int
+    cert_chain_total_len: int
+    issues: list[str]
+
+
+def to_hex(data: Iterable[int]) -> str:
+    return "".join(f"{b:02x}" for b in data)
+
+
+def read_u16be(data: list[int], off: int = 0) -> int:
+    return (data[off] << 8) | data[off + 1]
+
+
+def normalize_u8_list(value: Any) -> list[int]:
+    if not isinstance(value, list):
+        return []
+    out: list[int] = []
+    for item in value:
+        if isinstance(item, int) and 0 <= item <= 0xFF:
+            out.append(item)
+        else:
+            return []
+    return out
+
+
+def as_dict(value: Any) -> dict[str, Any]:
+    return value if isinstance(value, dict) else {}
+
+
+def as_int(value: Any, default: int = 0) -> int:
+    return value if isinstance(value, int) else default
+
+
+def decode_version_pair(v: list[int]) -> str:
+    if len(v) != 2:
+        return f"invalid({v})"
+    ver = read_u16be(v)
+    return f"0x{ver:04x} ({TLS_VERSIONS.get(ver, 'unknown')})"
+
+
+def decode_cipher_suite(v: list[int]) -> str:
+    if len(v) != 2:
+        return f"invalid({v})"
+    cs = read_u16be(v)
+    name = CIPHER_NAMES.get(cs, "unknown")
+    return f"0x{cs:04x} ({name})"
+
+
+def decode_supported_versions(data: list[int]) -> str:
+    if len(data) == 2:
+        ver = read_u16be(data)
+        return f"selected=0x{ver:04x} ({TLS_VERSIONS.get(ver, 'unknown')})"
+    if not data:
+        return "empty"
+    if len(data) < 3:
+        return f"raw={to_hex(data)}"
+    vec_len = data[0]
+    versions: list[str] = []
+    for i in range(1, min(1 + vec_len, len(data)), 2):
+        if i + 1 >= len(data):
+            break
+        ver = read_u16be(data, i)
+        versions.append(f"0x{ver:04x}({TLS_VERSIONS.get(ver, 'unknown')})")
+    return "offered=[" + ", ".join(versions) + "]"
+
+
+def decode_key_share(data: list[int]) -> str:
+    if len(data) < 4:
+        return f"raw={to_hex(data)}"
+    group = read_u16be(data, 0)
+    key_len = read_u16be(data, 2)
+    key_hex = to_hex(data[4 : 4 + min(key_len, len(data) - 4)])
+    gname = NAMED_GROUPS.get(group, "unknown_group")
+    return f"group=0x{group:04x}({gname}), key_len={key_len}, key={key_hex}"
+
+
+def decode_alpn(data: list[int]) -> str:
+    if len(data) < 3:
+        return f"raw={to_hex(data)}"
+    total = read_u16be(data, 0)
+    pos = 2
+    vals: list[str] = []
+    limit = min(len(data), 2 + total)
+    while pos < limit:
+        ln = data[pos]
+        pos += 1
+        if pos + ln > limit:
+            break
+        raw = bytes(data[pos : pos + ln])
+        pos += ln
+        try:
+            vals.append(raw.decode("ascii"))
+        except UnicodeDecodeError:
+            vals.append(raw.hex())
+    return "protocols=[" + ", ".join(vals) + "]"
+
+
+def decode_extension(ext_type: int, data: list[int]) -> str:
+    if ext_type == 43:
+        return decode_supported_versions(data)
+    if ext_type == 51:
+        return decode_key_share(data)
+    if ext_type == 16:
+        return decode_alpn(data)
+    return f"raw={to_hex(data)}"
+
+
+def ts_to_iso(ts: Any) -> str:
+    if not isinstance(ts, int):
+        return "-"
+    return dt.datetime.fromtimestamp(ts, tz=dt.timezone.utc).isoformat()
+
+
+def recognize_profile(obj: dict[str, Any]) -> ProfileRecognition:
+    issues: list[str] = []
+
+    sh = as_dict(obj.get("server_hello_template"))
+    if not sh:
+        issues.append("missing server_hello_template")
+
+    version = normalize_u8_list(sh.get("version"))
+    if version and len(version) != 2:
+        issues.append("server_hello_template.version must have 2 bytes")
+
+    app_sizes = obj.get("app_data_records_sizes")
+    if not isinstance(app_sizes, list) or not app_sizes:
+        issues.append("missing app_data_records_sizes")
+    elif any((not isinstance(v, int) or v <= 0) for v in app_sizes):
+        issues.append("app_data_records_sizes contains invalid values")
+
+    if not isinstance(obj.get("total_app_data_len"), int):
+        issues.append("missing total_app_data_len")
+
+    cert_info = as_dict(obj.get("cert_info"))
+    has_cert_info = bool(
+        cert_info.get("subject_cn")
+        or cert_info.get("issuer_cn")
+        or cert_info.get("san_names")
+        or isinstance(cert_info.get("not_before_unix"), int)
+        or isinstance(cert_info.get("not_after_unix"), int)
+    )
+
+    cert_payload = as_dict(obj.get("cert_payload"))
+    cert_message_len = 0
+    cert_chain_count = 0
+    cert_chain_total_len = 0
+    has_full_cert_payload = False
+
+    if cert_payload:
+        cert_msg = normalize_u8_list(cert_payload.get("certificate_message"))
+        if not cert_msg:
+            issues.append("cert_payload.certificate_message is missing or invalid")
+        else:
+            cert_message_len = len(cert_msg)
+
+        chain_raw = cert_payload.get("cert_chain_der")
+        if not isinstance(chain_raw, list):
+            issues.append("cert_payload.cert_chain_der is missing or invalid")
+        else:
+            for entry in chain_raw:
+                cert = normalize_u8_list(entry)
+                if cert:
+                    cert_chain_count += 1
+                    cert_chain_total_len += len(cert)
+                else:
+                    issues.append("cert_payload.cert_chain_der has invalid certificate entry")
+                    break
+
+        has_full_cert_payload = cert_message_len > 0 and cert_chain_count > 0
+    elif obj.get("cert_payload") is not None:
+        issues.append("cert_payload is not an object")
+
+    if has_full_cert_payload:
+        schema = "current"
+        mode = "full-cert-payload"
+    elif has_cert_info:
+        schema = "current-compact"
+        mode = "compact-cert-info"
+    else:
+        schema = "legacy"
+        mode = "random-fallback"
+
+    if issues:
+        schema = f"{schema}+issues"
+
+    return ProfileRecognition(
+        schema=schema,
+        mode=mode,
+        has_cert_info=has_cert_info,
+        has_full_cert_payload=has_full_cert_payload,
+        cert_message_len=cert_message_len,
+        cert_chain_count=cert_chain_count,
+        cert_chain_total_len=cert_chain_total_len,
+        issues=issues,
+    )
+
+
+def decode_profile(path: Path) -> tuple[str, ProfileRecognition]:
+    obj: dict[str, Any] = json.loads(path.read_text(encoding="utf-8"))
+    recognition = recognize_profile(obj)
+
+    sh = as_dict(obj.get("server_hello_template"))
+    version = normalize_u8_list(sh.get("version"))
+    cipher = normalize_u8_list(sh.get("cipher_suite"))
+    random_bytes = normalize_u8_list(sh.get("random"))
+    session_id = normalize_u8_list(sh.get("session_id"))
+
+    lines: list[str] = []
+    lines.append(f"[{path.name}]")
+    lines.append(f"  domain: {obj.get('domain', '-')}")
+    lines.append(f"  profile.schema: {recognition.schema}")
+    lines.append(f"  profile.mode: {recognition.mode}")
+    lines.append(f"  profile.has_full_cert_payload: {recognition.has_full_cert_payload}")
+    lines.append(f"  profile.has_cert_info: {recognition.has_cert_info}")
+    if recognition.has_full_cert_payload:
+        lines.append(f"  profile.cert_message_len: {recognition.cert_message_len}")
+        lines.append(f"  profile.cert_chain_count: {recognition.cert_chain_count}")
+        lines.append(f"  profile.cert_chain_total_len: {recognition.cert_chain_total_len}")
+    if recognition.issues:
+        lines.append("  profile.issues:")
+        for issue in recognition.issues:
+            lines.append(f"    - {issue}")
+
+    lines.append(f"  tls.version: {decode_version_pair(version)}")
+    lines.append(f"  tls.cipher: {decode_cipher_suite(cipher)}")
+    lines.append(f"  tls.compression: {sh.get('compression', '-')}")
+    lines.append(f"  tls.random: {to_hex(random_bytes)}")
+    lines.append(f"  tls.session_id_len: {len(session_id)}")
+    if session_id:
+        lines.append(f"  tls.session_id: {to_hex(session_id)}")
+
+    app_sizes = obj.get("app_data_records_sizes", [])
+    if isinstance(app_sizes, list):
+        lines.append("  app_data_records_sizes: " + ", ".join(str(v) for v in app_sizes))
+    else:
+        lines.append("  app_data_records_sizes: -")
+    lines.append(f"  total_app_data_len: {obj.get('total_app_data_len', '-')}")
+
+    cert = as_dict(obj.get("cert_info"))
+    if cert:
+        lines.append("  cert_info:")
+        lines.append(f"    subject_cn: {cert.get('subject_cn') or '-'}")
+        lines.append(f"    issuer_cn: {cert.get('issuer_cn') or '-'}")
+        lines.append(f"    not_before: {ts_to_iso(cert.get('not_before_unix'))}")
+        lines.append(f"    not_after:  {ts_to_iso(cert.get('not_after_unix'))}")
+        sans = cert.get("san_names")
+        if isinstance(sans, list) and sans:
+            lines.append("    san_names: " + ", ".join(str(v) for v in sans))
+        else:
+            lines.append("    san_names: -")
+    else:
+        lines.append("  cert_info: -")
+
+    exts = sh.get("extensions", [])
+    if not isinstance(exts, list):
+        exts = []
+    lines.append(f"  extensions[{len(exts)}]:")
+    for ext in exts:
+        ext_obj = as_dict(ext)
+        ext_type = as_int(ext_obj.get("ext_type"), -1)
+        data = normalize_u8_list(ext_obj.get("data"))
+        name = EXT_NAMES.get(ext_type, "unknown")
+        decoded = decode_extension(ext_type, data)
+        lines.append(f"    - type={ext_type} ({name}), len={len(data)}: {decoded}")
+
+    lines.append("")
+    return ("\n".join(lines), recognition)
+
+
+def collect_files(input_path: Path) -> list[Path]:
+    if input_path.is_file():
+        return [input_path]
+    return sorted(p for p in input_path.glob("*.json") if p.is_file())
+
+
+def main() -> int:
+    parser = argparse.ArgumentParser(
+        description="Decode TLS profile JSON files and recognize current schema."
+    )
+    parser.add_argument(
+        "path",
+        nargs="?",
+        default="tlsfront",
+        help="Path to tlsfront directory or a single JSON file.",
+    )
+    parser.add_argument(
+        "--only-current",
+        action="store_true",
+        help="Show only profiles recognized as current/full-cert-payload.",
+    )
+    args = parser.parse_args()
+
+    base = Path(args.path)
+    if not base.exists():
+        print(f"Path not found: {base}")
+        return 1
+
+    files = collect_files(base)
+    if not files:
+        print(f"No JSON files found in: {base}")
+        return 1
+
+    printed = 0
+    for path in files:
+        try:
+            rendered, recognition = decode_profile(path)
+            if args.only_current and recognition.schema != "current":
+                continue
+            print(rendered, end="")
+            printed += 1
+        except Exception as e:  # noqa: BLE001
+            print(f"[{path.name}] decode error: {e}\n")
+
+    if args.only_current and printed == 0:
+        print("No current profiles found.")
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())

tools/zbx_telemt_template.yaml

@@ -0,0 +1,276 @@
+zabbix_export:
+  version: '7.0'
+  template_groups:
+    - uuid: 43d0fe04c7094000829b0d28c6e3470c
+      name: 'Custom Templates'
+  templates:
+    - uuid: f2a694213c3d49d88cc03bffb111429e
+      template: Telemt
+      name: Telemt
+      description: |
+        A simple template using Prometheus metrics.
+        Set the {$TELEMT_URL} macro with the metrics URL
+      groups:
+        - name: 'Custom Templates'
+      items:
+        - uuid: fb95391c7f894e3eb6984b92885813a2
+          name: 'Connections bad total'
+          type: DEPENDENT
+          key: telemt.conn_bad_total
+          delay: '0'
+          trends: '0'
+          preprocessing:
+            - type: PROMETHEUS_PATTERN
+              parameters:
+                - telemt_connections_bad_total
+                - value
+                - ''
+          master_item:
+            key: telemt.prom_metrics
+          tags:
+            - tag: Application
+              value: 'Server connections'
+        - uuid: f36c9632394a4af3853583857ca8dbf1
+          name: 'Connections total'
+          type: DEPENDENT
+          key: telemt.conn_total
+          delay: '0'
+          trends: '0'
+          preprocessing:
+            - type: PROMETHEUS_PATTERN
+              parameters:
+                - telemt_connections_total
+                - value
+                - ''
+          master_item:
+            key: telemt.prom_metrics
+          tags:
+            - tag: Application
+              value: 'Server connections'
+        - uuid: 1618272cf68e44509425f5fab029db7b
+          name: 'Handshake timeouts total'
+          type: DEPENDENT
+          key: telemt.handshake_timeouts_total
+          delay: '0'
+          trends: '0'
+          preprocessing:
+            - type: PROMETHEUS_PATTERN
+              parameters:
+                - telemt_handshake_timeouts_total
+                - value
+                - ''
+          master_item:
+            key: telemt.prom_metrics
+          tags:
+            - tag: Application
+              value: 'Server connections'
+        - uuid: fb95391c7f894e3eb6984b92885813d2
+          name: 'ME keepalive send failures'
+          type: DEPENDENT
+          key: telemt.me_keepalive_failed_total
+          delay: '0'
+          trends: '0'
+          preprocessing:
+            - type: PROMETHEUS_PATTERN
+              parameters:
+                - telemt_me_keepalive_failed_total
+                - value
+                - ''
+          master_item:
+            key: telemt.prom_metrics
+          tags:
+            - tag: Application
+              value: 'Middle-End connections'
+        - uuid: fb95391c7f894e3eb6984b92885813c2
+          name: 'ME keepalive frames sent'
+          type: DEPENDENT
+          key: telemt.me_keepalive_sent_total
+          delay: '0'
+          trends: '0'
+          preprocessing:
+            - type: PROMETHEUS_PATTERN
+              parameters:
+                - telemt_me_keepalive_sent_total
+                - value
+                - ''
+          master_item:
+            key: telemt.prom_metrics
+          tags:
+            - tag: Application
+              value: 'Middle-End connections'
+        - uuid: fb95391c7f894e3eb6984b92885811a2
+          name: 'ME reconnect attempts'
+          type: DEPENDENT
+          key: telemt.me_reconnect_attempts_total
+          delay: '0'
+          trends: '0'
+          preprocessing:
+            - type: PROMETHEUS_PATTERN
+              parameters:
+                - telemt_me_reconnect_attempts_total
+                - value
+                - ''
+          master_item:
+            key: telemt.prom_metrics
+          tags:
+            - tag: Application
+              value: 'Middle-End connections'
+        - uuid: fb95391c7f894e3eb6984b92885812a2
+          name: 'ME reconnect successes'
+          type: DEPENDENT
+          key: telemt.me_reconnect_success_total
+          delay: '0'
+          trends: '0'
+          preprocessing:
+            - type: PROMETHEUS_PATTERN
+              parameters:
+                - telemt_me_reconnect_success_total
+                - value
+                - ''
+          master_item:
+            key: telemt.prom_metrics
+          tags:
+            - tag: Application
+              value: 'Middle-End connections'
+        - uuid: 991b1858e3f94b3098ff0f84859efc41
+          name: 'Prometheus metrics'
+          type: HTTP_AGENT
+          key: telemt.prom_metrics
+          value_type: TEXT
+          trends: '0'
+          url: '{$TELEMT_URL}'
+        - uuid: fb95391c7f894e3eb6984b92885813b2
+          name: 'Telemt Uptime'
+          type: DEPENDENT
+          key: telemt.uptime
+          delay: '0'
+          trends: '0'
+          units: s
+          preprocessing:
+            - type: PROMETHEUS_PATTERN
+              parameters:
+                - telemt_uptime_seconds
+                - value
+                - ''
+          master_item:
+            key: telemt.prom_metrics
+          tags:
+            - tag: Application
+              value: 'Server connections'
+      discovery_rules:
+        - uuid: 22727585c14049fbb0863c15dd68634c
+          name: 'Get users'
+          type: DEPENDENT
+          key: telemt.users
+          delay: '0'
+          item_prototypes:
+            - uuid: 137e371a47714a21b5c0c89d535dd717
+              name: 'Active connections by {#TELEMT_USER}'
+              type: DEPENDENT
+              key: 'telemt.active_conn_[{#TELEMT_USER}]'
+              delay: '0'
+              preprocessing:
+                - type: PROMETHEUS_PATTERN
+                  parameters:
+                    - 'telemt_user_connections_current{user=~"{#TELEMT_USER}"}'
+                    - value
+                    - ''
+              master_item:
+                key: telemt.prom_metrics
+              tags:
+                - tag: Application
+                  value: 'Users connections'
+            - uuid: 3ccce91ab5d54b4d972280c7b7bda910
+              name: 'Messages received from {#TELEMT_USER}'
+              type: DEPENDENT
+              key: 'telemt.msgs_from_[{#TELEMT_USER}]'
+              delay: '0'
+              preprocessing:
+                - type: PROMETHEUS_PATTERN
+                  parameters:
+                    - 'telemt_user_msgs_from_client{user=~"{#TELEMT_USER}"}'
+                    - value
+                    - ''
+              master_item:
+                key: telemt.prom_metrics
+              tags:
+                - tag: Application
+                  value: 'Users connections'
+            - uuid: e539126215f2419bbfd0d8099aabe1cb
+              name: 'Messages sent to {#TELEMT_USER}'
+              type: DEPENDENT
+              key: 'telemt.msgs_to_[{#TELEMT_USER}]'
+              delay: '0'
+              preprocessing:
+                - type: PROMETHEUS_PATTERN
+                  parameters:
+                    - 'telemt_user_msgs_to_client{user=~"{#TELEMT_USER}"}'
+                    - value
+                    - ''
+              master_item:
+                key: telemt.prom_metrics
+              tags:
+                - tag: Application
+                  value: 'Users connections'
+            - uuid: 810a8f6346a44ae7bd79a357dbfe2b3c
+              name: 'Bytes received from {#TELEMT_USER}'
+              type: DEPENDENT
+              key: 'telemt.octets_from_[{#TELEMT_USER}]'
+              delay: '0'
+              units: B
+              preprocessing:
+                - type: PROMETHEUS_PATTERN
+                  parameters:
+                    - 'telemt_user_octets_from_client{user=~"{#TELEMT_USER}"}'
+                    - value
+                    - ''
+              master_item:
+                key: telemt.prom_metrics
+              tags:
+                - tag: Application
+                  value: 'Users connections'
+            - uuid: d0cc3b4d618b4f0d97f8127b51f872c8
+              name: 'Bytes sent to {#TELEMT_USER}'
+              type: DEPENDENT
+              key: 'telemt.octets_to_[{#TELEMT_USER}]'
+              delay: '0'
+              units: B
+              preprocessing:
+                - type: PROMETHEUS_PATTERN
+                  parameters:
+                    - 'telemt_user_octets_to_client{user=~"{#TELEMT_USER}"}'
+                    - value
+                    - ''
+              master_item:
+                key: telemt.prom_metrics
+              tags:
+                - tag: Application
+                  value: 'Users connections'
+            - uuid: e9735aef967b4af28ed59f6c76ad493d
+              name: 'Total connections by {#TELEMT_USER}'
+              type: DEPENDENT
+              key: 'telemt.total_conn_[{#TELEMT_USER}]'
+              delay: '0'
+              preprocessing:
+                - type: PROMETHEUS_PATTERN
+                  parameters:
+                    - 'telemt_user_connections_total{user=~"{#TELEMT_USER}"}'
+                    - value
+                    - ''
+              master_item:
+                key: telemt.prom_metrics
+              tags:
+                - tag: Application
+                  value: 'Users connections'
+          master_item:
+            key: telemt.prom_metrics
+          lld_macro_paths:
+            - lld_macro: '{#TELEMT_USER}'
+              path: '$.labels[''user'']'
+          preprocessing:
+            - type: PROMETHEUS_TO_JSON
+              parameters:
+                - ''
+      tags:
+        - tag: target
+          value: Telemt