feat: wire-level forwarding, cache, request hedging, and DoH keepalive

Wire-level forwarding path skips DnsPacket parse/serialize on the hot
path. Cache stores raw wire bytes with pre-scanned TTL offsets — patches
ID + TTLs in-place on lookup instead of cloning parsed packets.

Request hedging (Dean & Barroso "Tail at Scale") fires a second
parallel request after a configurable delay (default 10ms) when
the primary upstream stalls. DoH keepalive loop prevents idle
HTTP/2 + TLS connection teardown.

Recursive resolver now hedges across multiple NS addresses and
caches NS delegation records to skip TLD re-queries.

Integration test harness polls /blocking/stats instead of fixed
sleep, eliminating the blocklist-download race condition.
This commit is contained in:
Razvan Dimescu
2026-04-12 04:20:18 +03:00
parent 4f46550283
commit 7efac85836
18 changed files with 4091 additions and 110 deletions

458
Cargo.lock generated
View File

@@ -82,6 +82,12 @@ dependencies = [
"windows-sys 0.61.2",
]
[[package]]
name = "anyhow"
version = "1.0.102"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "7f202df86484c868dbad7eaa557ef785d5c66295e41b460ef922eca0723b842c"
[[package]]
name = "arc-swap"
version = "1.9.0"
@@ -142,6 +148,17 @@ dependencies = [
"tokio",
]
[[package]]
name = "async-trait"
version = "0.1.89"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "9035ad2d096bed7955a320ee7e2230574d28fd3c3a0f186cbea1ff3c7eed5dbb"
dependencies = [
"proc-macro2",
"quote",
"syn",
]
[[package]]
name = "atomic-waker"
version = "1.1.2"
@@ -410,6 +427,21 @@ dependencies = [
"itertools",
]
[[package]]
name = "critical-section"
version = "1.2.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "790eea4361631c5e7d22598ecd5723ff611904e3344ce8720784c93e3d83d40b"
[[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"
@@ -493,6 +525,18 @@ version = "1.15.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "48c757948c5ede0e46177b7add2e67155f70e33c07fea8284df6576da70b3719"
[[package]]
name = "enum-as-inner"
version = "0.6.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "a1e6a265c649f3f5979b601d26f1d05ada116434c87741c9493cb56218f76cbc"
dependencies = [
"heck",
"proc-macro2",
"quote",
"syn",
]
[[package]]
name = "env_filter"
version = "1.0.1"
@@ -554,6 +598,12 @@ version = "1.0.7"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "3f9eec918d3f24069decb9af1554cad7c880e2da24a9afd88aca000531ab82c1"
[[package]]
name = "foldhash"
version = "0.1.5"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "d9c4f5dac5e15c24eb999c26181a6ca40b39fe946cbe4c263c7209467bc83af2"
[[package]]
name = "form_urlencoded"
version = "1.2.2"
@@ -679,11 +729,24 @@ dependencies = [
"cfg-if",
"js-sys",
"libc",
"r-efi",
"r-efi 5.3.0",
"wasip2",
"wasm-bindgen",
]
[[package]]
name = "getrandom"
version = "0.4.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "0de51e6874e94e7bf76d726fc5d13ba782deca734ff60d5bb2fb2607c7406555"
dependencies = [
"cfg-if",
"libc",
"r-efi 6.0.0",
"wasip2",
"wasip3",
]
[[package]]
name = "h2"
version = "0.4.13"
@@ -714,12 +777,82 @@ dependencies = [
"zerocopy",
]
[[package]]
name = "hashbrown"
version = "0.15.5"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "9229cfe53dfd69f0609a49f65461bd93001ea1ef889cd5529dd176593f5338a1"
dependencies = [
"foldhash",
]
[[package]]
name = "hashbrown"
version = "0.16.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "841d1cc9bed7f9236f321df977030373f4a4163ae1a7dbfe1a51a2c1a51d9100"
[[package]]
name = "heck"
version = "0.5.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "2304e00983f87ffb38b55b444b5e3b60a884b5d30c0fca7d82fe33449bbe55ea"
[[package]]
name = "hickory-proto"
version = "0.25.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "f8a6fe56c0038198998a6f217ca4e7ef3a5e51f46163bd6dd60b5c71ca6c6502"
dependencies = [
"async-trait",
"bytes",
"cfg-if",
"data-encoding",
"enum-as-inner",
"futures-channel",
"futures-io",
"futures-util",
"h2",
"http",
"idna",
"ipnet",
"once_cell",
"rand",
"ring",
"rustls",
"thiserror",
"tinyvec",
"tokio",
"tokio-rustls",
"tracing",
"url",
"webpki-roots 0.26.11",
]
[[package]]
name = "hickory-resolver"
version = "0.25.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "dc62a9a99b0bfb44d2ab95a7208ac952d31060efc16241c87eaf36406fecf87a"
dependencies = [
"cfg-if",
"futures-util",
"hickory-proto",
"ipconfig",
"moka",
"once_cell",
"parking_lot",
"rand",
"resolv-conf",
"rustls",
"smallvec",
"thiserror",
"tokio",
"tokio-rustls",
"tracing",
"webpki-roots 0.26.11",
]
[[package]]
name = "http"
version = "1.4.0"
@@ -802,7 +935,7 @@ dependencies = [
"tokio",
"tokio-rustls",
"tower-service",
"webpki-roots",
"webpki-roots 1.0.6",
]
[[package]]
@@ -909,6 +1042,12 @@ dependencies = [
"zerovec",
]
[[package]]
name = "id-arena"
version = "2.3.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "3d3067d79b975e8844ca9eb072e16b31c3c1c36928edf9c6789548c524d0d954"
[[package]]
name = "idna"
version = "1.1.0"
@@ -937,7 +1076,22 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "7714e70437a7dc3ac8eb7e6f8df75fd8eb422675fc7678aff7364301092b1017"
dependencies = [
"equivalent",
"hashbrown",
"hashbrown 0.16.1",
"serde",
"serde_core",
]
[[package]]
name = "ipconfig"
version = "0.3.4"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "4d40460c0ce33d6ce4b0630ad68ff63d6661961c48b6dba35e5a4d81cfb48222"
dependencies = [
"socket2",
"widestring",
"windows-registry",
"windows-result",
"windows-sys 0.61.2",
]
[[package]]
@@ -1029,6 +1183,12 @@ version = "1.5.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "bbd2bcb4c963f2ddae06a2efc7e9f3591312473c50c6685e1f298068316e66fe"
[[package]]
name = "leb128fmt"
version = "0.1.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "09edd9e8b54e49e587e4f6295a7d29c3ea94d469cb40ab8ca70b288248a81db2"
[[package]]
name = "libc"
version = "0.2.183"
@@ -1041,6 +1201,15 @@ version = "0.8.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "6373607a59f0be73a39b6fe456b8192fcc3585f602af20751600e974dd455e77"
[[package]]
name = "lock_api"
version = "0.4.14"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "224399e74b87b5f3557511d98dff8b14089b3dadafcab6bb93eab67d3aace965"
dependencies = [
"scopeguard",
]
[[package]]
name = "log"
version = "0.4.29"
@@ -1098,6 +1267,23 @@ dependencies = [
"windows-sys 0.61.2",
]
[[package]]
name = "moka"
version = "0.12.15"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "957228ad12042ee839f93c8f257b62b4c0ab5eaae1d4fa60de53b27c9d7c5046"
dependencies = [
"crossbeam-channel",
"crossbeam-epoch",
"crossbeam-utils",
"equivalent",
"parking_lot",
"portable-atomic",
"smallvec",
"tagptr",
"uuid",
]
[[package]]
name = "nom"
version = "7.1.3"
@@ -1151,6 +1337,8 @@ dependencies = [
"criterion",
"env_logger",
"futures",
"hickory-proto",
"hickory-resolver",
"http",
"http-body-util",
"hyper",
@@ -1187,6 +1375,10 @@ name = "once_cell"
version = "1.21.4"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "9f7c3e4beb33f85d45ae3e3a1792185706c8e16d043238c593331cc7cd313b50"
dependencies = [
"critical-section",
"portable-atomic",
]
[[package]]
name = "once_cell_polyfill"
@@ -1210,6 +1402,29 @@ dependencies = [
"winapi",
]
[[package]]
name = "parking_lot"
version = "0.12.5"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "93857453250e3077bd71ff98b6a65ea6621a19bb0f559a85248955ac12c45a1a"
dependencies = [
"lock_api",
"parking_lot_core",
]
[[package]]
name = "parking_lot_core"
version = "0.9.12"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "2621685985a2ebf1c516881c026032ac7deafcda1a2c9b7850dc81e3dfcb64c1"
dependencies = [
"cfg-if",
"libc",
"redox_syscall",
"smallvec",
"windows-link",
]
[[package]]
name = "pem"
version = "3.0.6"
@@ -1305,6 +1520,16 @@ dependencies = [
"zerocopy",
]
[[package]]
name = "prettyplease"
version = "0.2.37"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "479ca8adacdd7ce8f1fb39ce9ecccbfe93a3f1344b3d0d97f20bc0196208f62b"
dependencies = [
"proc-macro2",
"syn",
]
[[package]]
name = "proc-macro2"
version = "1.0.106"
@@ -1390,6 +1615,12 @@ version = "5.3.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "69cdb34c158ceb288df11e18b4bd39de994f6657d83847bdffdbd7f346754b0f"
[[package]]
name = "r-efi"
version = "6.0.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "f8dcc9c7d52a811697d2151c701e0d08956f92b0e24136cf4cf27b57a6a0d9bf"
[[package]]
name = "rand"
version = "0.9.2"
@@ -1453,6 +1684,15 @@ dependencies = [
"yasna",
]
[[package]]
name = "redox_syscall"
version = "0.5.18"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "ed2bf2547551a7053d6fdfafda3f938979645c44812fbfcda098faae3f1a362d"
dependencies = [
"bitflags",
]
[[package]]
name = "regex"
version = "1.12.3"
@@ -1518,9 +1758,15 @@ dependencies = [
"wasm-bindgen",
"wasm-bindgen-futures",
"web-sys",
"webpki-roots",
"webpki-roots 1.0.6",
]
[[package]]
name = "resolv-conf"
version = "0.7.6"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "1e061d1b48cb8d38042de4ae0a7a6401009d6143dc80d2e2d6f31f0bdd6470c7"
[[package]]
name = "ring"
version = "0.17.14"
@@ -1618,6 +1864,18 @@ dependencies = [
"winapi-util",
]
[[package]]
name = "scopeguard"
version = "1.2.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "94143f37725109f92c262ed2cf5e59bce7498c01bcc1502d7b9afe439a4e9f49"
[[package]]
name = "semver"
version = "1.0.28"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "8a7852d02fc848982e0c167ef163aaff9cd91dc640ba85e263cb1ce46fae51cd"
[[package]]
name = "serde"
version = "1.0.228"
@@ -1780,6 +2038,12 @@ dependencies = [
"syn",
]
[[package]]
name = "tagptr"
version = "0.2.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "7b2093cf4c8eb1e67749a6762251bc9cd836b6fc171623bd0a9d324d37af2417"
[[package]]
name = "thiserror"
version = "2.0.18"
@@ -2038,6 +2302,12 @@ version = "1.0.24"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "e6e4313cd5fcd3dad5cafa179702e2b244f760991f45397d14d4ebf38247da75"
[[package]]
name = "unicode-xid"
version = "0.2.6"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "ebc1c04c71510c7f702b52b7c350734c9ff1295c464a03335b00bb84fc54f853"
[[package]]
name = "untrusted"
version = "0.9.0"
@@ -2068,6 +2338,17 @@ version = "0.2.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "06abde3611657adf66d383f00b093d7faecc7fa57071cce2578660c9f1010821"
[[package]]
name = "uuid"
version = "1.23.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "5ac8b6f42ead25368cf5b098aeb3dc8a1a2c05a3eee8a9a1a68c640edbfc79d9"
dependencies = [
"getrandom 0.4.2",
"js-sys",
"wasm-bindgen",
]
[[package]]
name = "walkdir"
version = "2.5.0"
@@ -2102,6 +2383,15 @@ dependencies = [
"wit-bindgen",
]
[[package]]
name = "wasip3"
version = "0.4.0+wasi-0.3.0-rc-2026-01-06"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "5428f8bf88ea5ddc08faddef2ac4a67e390b88186c703ce6dbd955e1c145aca5"
dependencies = [
"wit-bindgen",
]
[[package]]
name = "wasm-bindgen"
version = "0.2.115"
@@ -2157,6 +2447,40 @@ dependencies = [
"unicode-ident",
]
[[package]]
name = "wasm-encoder"
version = "0.244.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "990065f2fe63003fe337b932cfb5e3b80e0b4d0f5ff650e6985b1048f62c8319"
dependencies = [
"leb128fmt",
"wasmparser",
]
[[package]]
name = "wasm-metadata"
version = "0.244.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "bb0e353e6a2fbdc176932bbaab493762eb1255a7900fe0fea1a2f96c296cc909"
dependencies = [
"anyhow",
"indexmap",
"wasm-encoder",
"wasmparser",
]
[[package]]
name = "wasmparser"
version = "0.244.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "47b807c72e1bac69382b3a6fb3dbe8ea4c0ed87ff5629b8685ae6b9a611028fe"
dependencies = [
"bitflags",
"hashbrown 0.15.5",
"indexmap",
"semver",
]
[[package]]
name = "web-sys"
version = "0.3.92"
@@ -2177,6 +2501,15 @@ 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"
@@ -2186,6 +2519,12 @@ dependencies = [
"rustls-pki-types",
]
[[package]]
name = "widestring"
version = "1.2.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "72069c3113ab32ab29e5584db3c6ec55d416895e60715417b5b883a357c3e471"
[[package]]
name = "winapi"
version = "0.3.9"
@@ -2223,6 +2562,35 @@ version = "0.2.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "f0805222e57f7521d6a62e36fa9163bc891acd422f971defe97d64e70d0a4fe5"
[[package]]
name = "windows-registry"
version = "0.6.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "02752bf7fbdcce7f2a27a742f798510f3e5ad88dbe84871e5168e2120c3d5720"
dependencies = [
"windows-link",
"windows-result",
"windows-strings",
]
[[package]]
name = "windows-result"
version = "0.4.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "7781fa89eaf60850ac3d2da7af8e5242a5ea78d1a11c49bf2910bb5a73853eb5"
dependencies = [
"windows-link",
]
[[package]]
name = "windows-strings"
version = "0.5.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "7837d08f69c77cf6b07689544538e017c1bfcf57e34b4c0ff58e6c2cd3b37091"
dependencies = [
"windows-link",
]
[[package]]
name = "windows-sys"
version = "0.52.0"
@@ -2390,6 +2758,88 @@ name = "wit-bindgen"
version = "0.51.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "d7249219f66ced02969388cf2bb044a09756a083d0fab1e566056b04d9fbcaa5"
dependencies = [
"wit-bindgen-rust-macro",
]
[[package]]
name = "wit-bindgen-core"
version = "0.51.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "ea61de684c3ea68cb082b7a88508a8b27fcc8b797d738bfc99a82facf1d752dc"
dependencies = [
"anyhow",
"heck",
"wit-parser",
]
[[package]]
name = "wit-bindgen-rust"
version = "0.51.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "b7c566e0f4b284dd6561c786d9cb0142da491f46a9fbed79ea69cdad5db17f21"
dependencies = [
"anyhow",
"heck",
"indexmap",
"prettyplease",
"syn",
"wasm-metadata",
"wit-bindgen-core",
"wit-component",
]
[[package]]
name = "wit-bindgen-rust-macro"
version = "0.51.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "0c0f9bfd77e6a48eccf51359e3ae77140a7f50b1e2ebfe62422d8afdaffab17a"
dependencies = [
"anyhow",
"prettyplease",
"proc-macro2",
"quote",
"syn",
"wit-bindgen-core",
"wit-bindgen-rust",
]
[[package]]
name = "wit-component"
version = "0.244.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "9d66ea20e9553b30172b5e831994e35fbde2d165325bec84fc43dbf6f4eb9cb2"
dependencies = [
"anyhow",
"bitflags",
"indexmap",
"log",
"serde",
"serde_derive",
"serde_json",
"wasm-encoder",
"wasm-metadata",
"wasmparser",
"wit-parser",
]
[[package]]
name = "wit-parser"
version = "0.244.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "ecc8ac4bc1dc3381b7f59c34f00b67e18f910c2c0f50015669dde7def656a736"
dependencies = [
"anyhow",
"id-arena",
"indexmap",
"log",
"semver",
"serde",
"serde_derive",
"serde_json",
"unicode-xid",
"wasmparser",
]
[[package]]
name = "writeable"