diff --git a/Cargo.lock b/Cargo.lock index b386e73..0e4de31 100644 --- a/Cargo.lock +++ b/Cargo.lock @@ -52,29 +52,29 @@ dependencies = [ [[package]] name = "anstyle-query" -version = "1.1.4" +version = "1.1.5" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "9e231f6134f61b71076a3eab506c379d4f36122f2af15a9ff04415ea4c3339e2" +checksum = "40c48f72fd53cd289104fc64099abca73db4166ad86ea0b4341abe65af83dadc" dependencies = [ - "windows-sys 0.60.2", + "windows-sys 0.61.2", ] [[package]] name = "anstyle-wincon" -version = "3.0.10" +version = "3.0.11" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "3e0633414522a32ffaac8ac6cc8f748e090c5717661fddeea04219e2344f5f2a" +checksum = "291e6a250ff86cd4a820112fb8898808a366d8f9f58ce16d1f538353ad55747d" dependencies = [ "anstyle", "once_cell_polyfill", - "windows-sys 0.60.2", + "windows-sys 0.61.2", ] [[package]] name = "async-compression" -version = "0.4.33" +version = "0.4.36" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "93c1f86859c1af3d514fa19e8323147ff10ea98684e6c7b307912509f50e67b2" +checksum = "98ec5f6c2f8bc326c994cb9e241cc257ddaba9afa8555a43cffbb5dd86efaa37" dependencies = [ "compression-codecs", "compression-core", @@ -115,21 +115,21 @@ checksum = "812e12b5285cc515a9c72a5c1d3b6d46a19dac5acfef5265968c166106e31dd3" [[package]] name = "bumpalo" -version = "3.19.0" +version = "3.19.1" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "46c5e41b57b8bba42a04676d81cb89e9ee8e859a1a66f80a5a72e1cb76b34d43" +checksum = "5dd9dc738b7a8311c7ade152424974d8115f2cdad61e8dab8dac9f2362298510" [[package]] name = "bytes" -version = "1.10.1" +version = "1.11.0" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "d71b6127be86fdcfddb610f7182ac57211d4b18a3e9c82eb2d17662f2227ad6a" +checksum = "b35204fbdc0b3f4446b89fc1ac2cf84a8a68971995d0bf2e925ec7cd960f9cb3" [[package]] name = "cc" -version = "1.2.45" +version = "1.2.50" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "35900b6c8d709fb1d854671ae27aeaa9eec2f8b01b364e1619a40da3e6fe2afe" +checksum = "9f50d563227a1c37cc0a263f64eca3334388c01c5e4c4861a9def205c614383c" dependencies = [ "find-msvc-tools", "jobserver", @@ -157,14 +157,14 @@ checksum = "145052bdd345b87320e369255277e3fb5152762ad123a901ef5c262dd38fe8d2" dependencies = [ "iana-time-zone", "num-traits", - "windows-link 0.2.1", + "windows-link", ] [[package]] name = "clap" -version = "4.5.51" +version = "4.5.53" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "4c26d721170e0295f191a69bd9a1f93efcdb0aff38684b61ab5750468972e5f5" +checksum = "c9e340e012a1bf4935f5282ed1436d1489548e8f72308207ea5df0e23d2d03f8" dependencies = [ "clap_builder", "clap_derive", @@ -172,9 +172,9 @@ dependencies = [ [[package]] name = "clap_builder" -version = "4.5.51" +version = "4.5.53" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "75835f0c7bf681bfd05abe44e965760fea999a5286c6eb2d59883634fd02011a" +checksum = "d76b5d13eaa18c901fd2f7fca939fefe3a0727a953561fefdf3b2922b8569d00" dependencies = [ "anstream", "anstyle", @@ -184,9 +184,9 @@ dependencies = [ [[package]] name = "clap_complete" -version = "4.5.60" +version = "4.5.62" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "8e602857739c5a4291dfa33b5a298aeac9006185229a700e5810a3ef7272d971" +checksum = "004eef6b14ce34759aa7de4aea3217e368f463f46a3ed3764ca4b5a4404003b4" dependencies = [ "clap", "clap_lex", @@ -220,9 +220,9 @@ checksum = "b05b61dc5112cbb17e4b6cd61790d9845d13888356391624cbe7e41efeac1e75" [[package]] name = "compression-codecs" -version = "0.4.32" +version = "0.4.35" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "680dc087785c5230f8e8843e2e57ac7c1c90488b6a91b88caa265410568f441b" +checksum = "b0f7ac3e5b97fdce45e8922fb05cae2c37f7bbd63d30dd94821dacfd8f3f2bf2" dependencies = [ "compression-core", "zstd", @@ -231,9 +231,9 @@ dependencies = [ [[package]] name = "compression-core" -version = "0.4.30" +version = "0.4.31" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "3a9b614a5787ef0c8802a55766480563cb3a93b435898c422ed2a359cf811582" +checksum = "75984efb6ed102a0d42db99afb6c1948f0380d1d91808d5529916e6c08b49d8d" [[package]] name = "core-foundation" @@ -274,6 +274,7 @@ dependencies = [ "clap_complete", "env_logger", "eyre", + "fastrand", "futures", "futures-util", "glob", @@ -357,9 +358,9 @@ checksum = "37909eebbb50d72f9059c3b6d82c0463f2ff062c9e95845c43a6c9c0355411be" [[package]] name = "find-msvc-tools" -version = "0.1.4" +version = "0.1.5" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "52051878f80a721bb68ebfbc930e07b65ba72f2da88968ea5c06fd6ca3d3a127" +checksum = "3a3076410a55c90011c298b04d0cfa770b00fa04e1e3c97d3f6c9de105a03844" [[package]] name = "fnv" @@ -530,9 +531,9 @@ dependencies = [ [[package]] name = "hashbrown" -version = "0.16.0" +version = "0.16.1" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "5419bdc4f6a9207fbeba6d11b604d481addf78ecd10c11ad51e76c2f6482748d" +checksum = "841d1cc9bed7f9236f321df977030373f4a4163ae1a7dbfe1a51a2c1a51d9100" [[package]] name = "heck" @@ -548,12 +549,11 @@ checksum = "7f24254aa9a54b5c858eaee2f5bccdb46aaf0e486a595ed5fd8f86ba55232a70" [[package]] name = "http" -version = "1.3.1" +version = "1.4.0" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "f4a85d31aea989eead29a3aaf9e1115a180df8282431156e533de47660892565" +checksum = "e3ba2a386d7f85a81f119ad7498ebe444d2e22c2af0b86b069416ace48b3311a" dependencies = [ "bytes", - "fnv", "itoa", ] @@ -588,9 +588,9 @@ checksum = "6dbf3de79e51f3d586ab4cb9d5c3e2c14aa28ed23d180cf89b4df0454a69cc87" [[package]] name = "hyper" -version = "1.7.0" +version = "1.8.1" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "eb3aa54a13a0dfe7fbe3a59e0c76093041720fdc77b110cc0fc260fafb4dc51e" +checksum = "2ab2d4f250c3d7b1c9fcdff1cece94ea4e2dfbec68614f7b87cb205f24ca9d11" dependencies = [ "atomic-waker", "bytes", @@ -642,9 +642,9 @@ dependencies = [ [[package]] name = "hyper-util" -version = "0.1.17" +version = "0.1.19" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "3c6995591a8f1380fcb4ba966a252a4b29188d51d2b89e3a252f5305be65aea8" +checksum = "727805d60e7938b76b826a6ef209eb70eaa1812794f9424d4a4e2d740662df5f" dependencies = [ "base64", "bytes", @@ -738,9 +738,9 @@ checksum = "7aedcccd01fc5fe81e6b489c15b247b8b0690feb23304303a9e560f37efc560a" [[package]] name = "icu_properties" -version = "2.1.1" +version = "2.1.2" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "e93fcd3157766c0c8da2f8cff6ce651a31f0810eaa1c51ec363ef790bbb5fb99" +checksum = "020bfc02fe870ec3a66d93e677ccca0562506e5872c650f893269e08615d74ec" dependencies = [ "icu_collections", "icu_locale_core", @@ -752,9 +752,9 @@ dependencies = [ [[package]] name = "icu_properties_data" -version = "2.1.1" +version = "2.1.2" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "02845b3647bb045f1100ecd6480ff52f34c35f82d9880e029d329c21d1054899" +checksum = "616c294cf8d725c6afcd8f55abc17c56464ef6211f9ed59cccffe534129c77af" [[package]] name = "icu_provider" @@ -800,9 +800,9 @@ checksum = "964de6e86d545b246d84badc0fef527924ace5134f30641c203ef52ba83f58d5" [[package]] name = "indexmap" -version = "2.12.0" +version = "2.12.1" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "6717a8d2a5a929a1a2eb43a12812498ed141a0bcfb7e8f7844fbdbe4303bba9f" +checksum = "0ad4bb2b565bca0645f4d68c5c9af97fba094e9791da685bf83cb5f3ce74acf2" dependencies = [ "equivalent", "hashbrown", @@ -881,9 +881,9 @@ dependencies = [ [[package]] name = "js-sys" -version = "0.3.82" +version = "0.3.83" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "b011eec8cc36da2aab2d5cff675ec18454fad408585853910a202391cf9f8e65" +checksum = "464a3709c7f55f1f721e5389aa6ea4e3bc6aba669353300af094b29ffbdde1d8" dependencies = [ "once_cell", "wasm-bindgen", @@ -891,9 +891,9 @@ dependencies = [ [[package]] name = "libc" -version = "0.2.177" +version = "0.2.178" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "2874a2af47a2325c2001a6e6fad9b16a53b802102b528163885171cf92b15976" +checksum = "37c93d8daa9d8a012fd8ab92f088405fb202ea0b6ab73ee2482ae66af4f42091" [[package]] name = "linux-raw-sys" @@ -909,9 +909,9 @@ checksum = "6373607a59f0be73a39b6fe456b8192fcc3585f602af20751600e974dd455e77" [[package]] name = "log" -version = "0.4.28" +version = "0.4.29" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "34080505efa8e45a4b816c349525ebe327ceaa8559756f0356cba97ef3bf7432" +checksum = "5e5032e24019045c762d3c0f28f5b6b8bbf38563a65908389bf7978758920897" [[package]] name = "lz4" @@ -946,9 +946,9 @@ checksum = "6877bb514081ee2a7ff5ef9de3281f14a4dd4bceac4c09388074a6b5df8a139a" [[package]] name = "mio" -version = "1.1.0" +version = "1.1.1" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "69d83b0086dc8ecf3ce9ae2874b2d1290252e2a30720bea58a5c6639b0092873" +checksum = "a69bcab0ad47271a0234d9422b131806bf3968021e5dc9328caf2d4cd58557fc" dependencies = [ "libc", "wasi", @@ -1162,9 +1162,9 @@ checksum = "7a2d987857b319362043e95f5353c0535c1f58eec5336fdfcf626430af7def58" [[package]] name = "reqwest" -version = "0.12.24" +version = "0.12.26" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "9d0946410b9f7b082a427e4ef5c8ff541a88b357bc6c637c40db3a68ac70a36f" +checksum = "3b4c14b2d9afca6a60277086b0cc6a6ae0b568f6f7916c943a8cdc79f8be240f" dependencies = [ "base64", "bytes", @@ -1245,9 +1245,9 @@ dependencies = [ [[package]] name = "rustls-pki-types" -version = "1.13.0" +version = "1.13.2" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "94182ad936a0c91c324cd46c6511b9510ed16af436d7b5bab34beab0afd55f7a" +checksum = "21e6f2ab2928ca4291b86736a8bd920a277a399bba1589409d72154ff87c1282" dependencies = [ "zeroize", ] @@ -1383,9 +1383,9 @@ checksum = "0fda2ff0d084019ba4d7c6f371c95d8fd75ce3524c3cb8fb653a3023f6323e64" [[package]] name = "signal-hook-registry" -version = "1.4.6" +version = "1.4.7" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "b2a4719bff48cee6b39d12c020eeb490953ad2443b7055bd0b21fca26bd8c28b" +checksum = "7664a098b8e616bdfcc2dc0e9ac44eb231eedf41db4e9fe95d8d32ec728dedad" dependencies = [ "libc", ] @@ -1432,9 +1432,9 @@ checksum = "13c2bddecc57b384dee18652358fb23172facb8a2c51ccc10d74c157bdea3292" [[package]] name = "syn" -version = "2.0.110" +version = "2.0.111" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "a99801b5bd34ede4cf3fc688c5919368fea4e4814a4664359503e6015b280aea" +checksum = "390cc9a294ab71bdb1aa2e99d13be9c753cd2d7bd6560c77118597410c4d2e87" dependencies = [ "proc-macro2", "quote", @@ -1602,9 +1602,9 @@ dependencies = [ [[package]] name = "tower-http" -version = "0.6.6" +version = "0.6.8" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "adc82fd73de2a9722ac5da747f12383d2bfdb93591ee6c58486e0097890f05f2" +checksum = "d4e6559d53cc268e5031cd8429d05415bc4cb4aefc4aa5d6cc35fbf5b924a1f8" dependencies = [ "bitflags", "bytes", @@ -1632,9 +1632,9 @@ checksum = "8df9b6e13f2d32c91b9bd719c00d1958837bc7dec474d94952798cc8e69eeec3" [[package]] name = "tracing" -version = "0.1.41" +version = "0.1.44" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "784e0ac535deb450455cbfa28a6f0df145ea1bb7ae51b821cf5e7927fdcfbdd0" +checksum = "63e71662fa4b2a2c3a26f570f037eb95bb1f85397f3cd8076caed2f026a6d100" dependencies = [ "pin-project-lite", "tracing-core", @@ -1642,9 +1642,9 @@ dependencies = [ [[package]] name = "tracing-core" -version = "0.1.34" +version = "0.1.36" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "b9d12581f227e93f094d3af2ae690a574abb8a2b9b7a96e7cfe9647b2b617678" +checksum = "db97caf9d906fbde555dd62fa95ddba9eecfd14cb388e4f491a66d74cd5fb79a" dependencies = [ "once_cell", ] @@ -1729,9 +1729,9 @@ dependencies = [ [[package]] name = "wasm-bindgen" -version = "0.2.105" +version = "0.2.106" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "da95793dfc411fbbd93f5be7715b0578ec61fe87cb1a42b12eb625caa5c5ea60" +checksum = "0d759f433fa64a2d763d1340820e46e111a7a5ab75f993d1852d70b03dbb80fd" dependencies = [ "cfg-if", "once_cell", @@ -1742,9 +1742,9 @@ dependencies = [ [[package]] name = "wasm-bindgen-futures" -version = "0.4.55" +version = "0.4.56" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "551f88106c6d5e7ccc7cd9a16f312dd3b5d36ea8b4954304657d5dfba115d4a0" +checksum = "836d9622d604feee9e5de25ac10e3ea5f2d65b41eac0d9ce72eb5deae707ce7c" dependencies = [ "cfg-if", "js-sys", @@ -1755,9 +1755,9 @@ dependencies = [ [[package]] name = "wasm-bindgen-macro" -version = "0.2.105" +version = "0.2.106" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "04264334509e04a7bf8690f2384ef5265f05143a4bff3889ab7a3269adab59c2" +checksum = "48cb0d2638f8baedbc542ed444afc0644a29166f1595371af4fecf8ce1e7eeb3" dependencies = [ "quote", "wasm-bindgen-macro-support", @@ -1765,9 +1765,9 @@ dependencies = [ [[package]] name = "wasm-bindgen-macro-support" -version = "0.2.105" +version = "0.2.106" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "420bc339d9f322e562942d52e115d57e950d12d88983a14c79b86859ee6c7ebc" +checksum = "cefb59d5cd5f92d9dcf80e4683949f15ca4b511f4ac0a6e14d4e1ac60c6ecd40" dependencies = [ "bumpalo", "proc-macro2", @@ -1778,9 +1778,9 @@ dependencies = [ [[package]] name = "wasm-bindgen-shared" -version = "0.2.105" +version = "0.2.106" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "76f218a38c84bcb33c25ec7059b07847d465ce0e0a76b995e134a45adcb6af76" +checksum = "cbc538057e648b67f72a982e708d485b2efa771e1ac05fec311f9f63e5800db4" dependencies = [ "unicode-ident", ] @@ -1800,9 +1800,9 @@ dependencies = [ [[package]] name = "web-sys" -version = "0.3.82" +version = "0.3.83" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "3a1f95c0d03a47f4ae1f7a64643a6bb97465d9b740f0fa8f90ea33915c99a9a1" +checksum = "9b32828d774c412041098d182a8b38b16ea816958e07cf40eec2bc080ae137ac" dependencies = [ "js-sys", "wasm-bindgen", @@ -1838,9 +1838,9 @@ checksum = "b8e83a14d34d0623b51dce9581199302a221863196a1dde71a7663a4c2be9deb" dependencies = [ "windows-implement", "windows-interface", - "windows-link 0.2.1", - "windows-result 0.4.1", - "windows-strings 0.5.1", + "windows-link", + "windows-result", + "windows-strings", ] [[package]] @@ -1865,12 +1865,6 @@ dependencies = [ "syn", ] -[[package]] -name = "windows-link" -version = "0.1.3" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "5e6ad25900d524eaabdbbb96d20b4311e1e7ae1699af4fb28c17ae66c80d798a" - [[package]] name = "windows-link" version = "0.2.1" @@ -1879,22 +1873,13 @@ checksum = "f0805222e57f7521d6a62e36fa9163bc891acd422f971defe97d64e70d0a4fe5" [[package]] name = "windows-registry" -version = "0.5.3" +version = "0.6.1" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "5b8a9ed28765efc97bbc954883f4e6796c33a06546ebafacbabee9696967499e" +checksum = "02752bf7fbdcce7f2a27a742f798510f3e5ad88dbe84871e5168e2120c3d5720" dependencies = [ - "windows-link 0.1.3", - "windows-result 0.3.4", - "windows-strings 0.4.2", -] - -[[package]] -name = "windows-result" -version = "0.3.4" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "56f42bd332cc6c8eac5af113fc0c1fd6a8fd2aa08a0119358686e5160d0586c6" -dependencies = [ - "windows-link 0.1.3", + "windows-link", + "windows-result", + "windows-strings", ] [[package]] @@ -1903,16 +1888,7 @@ version = "0.4.1" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "7781fa89eaf60850ac3d2da7af8e5242a5ea78d1a11c49bf2910bb5a73853eb5" dependencies = [ - "windows-link 0.2.1", -] - -[[package]] -name = "windows-strings" -version = "0.4.2" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "56e6c93f3a0c3b36176cb1327a4958a0353d5d166c2a35cb268ace15e91d3b57" -dependencies = [ - "windows-link 0.1.3", + "windows-link", ] [[package]] @@ -1921,7 +1897,7 @@ version = "0.5.1" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "7837d08f69c77cf6b07689544538e017c1bfcf57e34b4c0ff58e6c2cd3b37091" dependencies = [ - "windows-link 0.2.1", + "windows-link", ] [[package]] @@ -1948,7 +1924,7 @@ version = "0.61.2" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "ae137229bcbd6cdf0f7b80a31df61766145077ddf49416a728b02cb3921ff3fc" dependencies = [ - "windows-link 0.2.1", + "windows-link", ] [[package]] @@ -1973,7 +1949,7 @@ version = "0.53.5" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "4945f9f551b88e0d65f3db0bc25c33b8acea4d9e41163edf90dcd0b19f9069f3" dependencies = [ - "windows-link 0.2.1", + "windows-link", "windows_aarch64_gnullvm 0.53.1", "windows_aarch64_msvc 0.53.1", "windows_i686_gnu 0.53.1", diff --git a/Cargo.toml b/Cargo.toml index 34359f2..42125dc 100644 --- a/Cargo.toml +++ b/Cargo.toml @@ -19,6 +19,7 @@ clap = { version = "4.5.40", features = ["derive", "env"] } clap_complete = { version = "4.5.54", features = ["unstable-dynamic"] } env_logger = "0.11.8" eyre = "0.6.12" +fastrand = "2.3.0" futures = "0.3.31" futures-util = "0.3.31" glob = "0.3.2" diff --git a/src/bin/dkl.rs b/src/bin/dkl.rs index 6b7b212..b151064 100644 --- a/src/bin/dkl.rs +++ b/src/bin/dkl.rs @@ -1,6 +1,8 @@ use clap::{CommandFactory, Parser, Subcommand}; use eyre::{format_err, Result}; use log::{debug, error}; +use std::net::SocketAddr; +use std::time::Duration; use tokio::fs; #[derive(Parser)] @@ -65,6 +67,17 @@ enum Command { #[arg(long, default_value = "/")] chroot: std::path::PathBuf, }, + Proxy { + #[arg(long, short = 'l')] + listen: Vec, + targets: Vec, + /// target polling interval, in seconds + #[arg(long, default_value = "30")] + poll: u16, + /// connect or check timeout, in seconds + #[arg(long, default_value = "5")] + timeout: u16, + }, } #[tokio::main(flavor = "current_thread")] @@ -126,6 +139,20 @@ async fn main() -> Result<()> { .install(layer, version) .await } + C::Proxy { + listen, + targets, + poll, + timeout, + } => Ok(dkl::proxy::Proxy { + listen_addrs: listen, + targets, + poll_interval: Duration::from_secs(poll.into()), + timeout: Duration::from_secs(timeout.into()), + } + .run() + .await + .map(|_| ())?), } } diff --git a/src/lib.rs b/src/lib.rs index f5126bf..0c4910b 100644 --- a/src/lib.rs +++ b/src/lib.rs @@ -1,4 +1,5 @@ pub mod apply; +pub mod proxy; pub mod bootstrap; pub mod dls; pub mod dynlay; diff --git a/src/proxy.rs b/src/proxy.rs new file mode 100644 index 0000000..1a1fd9f --- /dev/null +++ b/src/proxy.rs @@ -0,0 +1,115 @@ +use log::info; +use std::convert::Infallible; +use std::net::SocketAddr; +use std::sync::atomic::Ordering::Relaxed; +use std::sync::{atomic::AtomicBool, Arc}; +use std::time::Duration; +use thiserror::Error; +use tokio::net::{TcpListener, TcpStream}; + +pub struct Proxy { + pub listen_addrs: Vec, + pub targets: Vec, + pub poll_interval: Duration, + pub timeout: Duration, +} + +#[derive(Debug, Error)] +pub enum Error { + #[error("failed to listen on {0}: {1}")] + ListenFailed(SocketAddr, std::io::Error), +} + +pub type Result = std::result::Result; + +impl Proxy { + pub async fn run(self) -> Result { + let mut listeners = Vec::with_capacity(self.listen_addrs.len()); + for addr in self.listen_addrs { + listeners.push( + TcpListener::bind(&addr) + .await + .map_err(|e| Error::ListenFailed(addr, e))?, + ); + info!("listening on {addr}"); + } + + // all targets are initially ok (better land on a down one than just fail) + let targets: Vec<_> = (self.targets.into_iter()) + .map(|t| TargetStatus(t, AtomicBool::new(true))) + .collect(); + let targets = Arc::new(targets); + + for listener in listeners { + tokio::spawn(proxy_listener(listener, targets.clone())); + } + + check_targets(targets.clone(), self.poll_interval, self.timeout).await + } +} + +struct TargetStatus(SocketAddr, AtomicBool); +impl TargetStatus { + fn is_up(&self) -> bool { + self.1.load(Relaxed) + } +} + +async fn check_targets(targets: Arc>, poll: Duration, timeout: Duration) -> ! { + use tokio::time; + let mut poll_ticker = time::interval(poll); + poll_ticker.set_missed_tick_behavior(time::MissedTickBehavior::Skip); + + let mut first = true; + + loop { + poll_ticker.tick().await; + + for i in 0..targets.len() { + let targets = targets.clone(); + tokio::spawn(async move { check_target(&targets[i], timeout, first).await }); + } + + first = false; + } +} + +async fn check_target(ts: &TargetStatus, timeout: Duration, first: bool) { + let target = ts.0; + + let is_up = match tokio::time::timeout(timeout, TcpStream::connect(target)).await { + Ok(Ok(_)) => true, + _ => false, + }; + + let prev = ts.1.swap(is_up, Relaxed); + + if first || prev != is_up { + if is_up { + info!("{target} is up"); + } else { + info!("{target} is down"); + } + } +} + +async fn proxy_listener(listener: TcpListener, targets: Arc>) { + let mut rng = fastrand::Rng::new(); + + loop { + let mut active = Vec::with_capacity(targets.len()); + let (mut src, _) = listener.accept().await.expect("listener.accept() failed"); + + active.extend(targets.iter().filter(|ts| ts.is_up()).map(|ts| ts.0)); + rng.shuffle(&mut active); + + tokio::spawn(async move { + for target in active { + if let Ok(mut dst) = TcpStream::connect(target).await { + let _ = tokio::io::copy_bidirectional(&mut src, &mut dst).await; + break; + } + } + }); + } +}