v26.2.4

changelog.md

@@ -1,5 +1,40 @@
 # Changelog
 
+## 2026-03-26 - 26.2.4 - fix(rustproxy-http)
+improve HTTP/3 connection reuse and clean up stale proxy state
+
+- Reuse pooled HTTP/3 SendRequest handles to skip repeated SETTINGS handshakes and reduce request overhead on QUIC pool hits
+- Add periodic cleanup for per-route rate limiters and orphaned backend metrics to prevent unbounded memory growth after traffic or backend errors stop
+- Enforce HTTP max connection lifetime alongside idle timeouts and apply configured lifetime values from the TCP listener
+- Reduce HTTP/3 body copying by using owned Bytes paths for request and response streaming, and replace the custom response body adapter with a stream-based implementation
+- Harden auxiliary proxy components by capping datagram handler buffer growth and removing duplicate RustProxy exit listeners
+
+## 2026-03-25 - 26.2.3 - fix(repo)
+no changes to commit
+
+
+## 2026-03-25 - 26.2.2 - fix(proxy)
+improve connection cleanup and route validation handling
+
+- add timeouts for HTTP/1 upstream connection drivers to prevent lingering tasks
+- ensure QUIC relay sessions cancel and abort background tasks on drop
+- avoid registering unnamed routes as duplicates and label unnamed catch-all conflicts clearly
+- fix offset mapping route helper to forward only remaining route options without overriding derived values
+- update project config filename and toolchain versions for the current build setup
+
+## 2026-03-23 - 26.2.1 - fix(rustproxy-http)
+include the upstream request URL when caching H3 Alt-Svc discoveries
+
+- Tracks the request path that triggered Alt-Svc discovery in connection activity state
+- Adds request URL context to Alt-Svc debug logging and protocol cache insertion reasons for better traceability
+
+## 2026-03-23 - 26.2.0 - feat(protocol-cache)
+add sliding TTL re-probing and eviction for backend protocol detection
+
+- extend protocol cache entries and metrics with last accessed and last probed timestamps
+- trigger periodic ALPN re-probes for cached H1/H2 entries while keeping active entries alive with a sliding 1 day TTL
+- log protocol transitions with reasons and evict cache entries when all protocol fallback attempts fail
+
 ## 2026-03-22 - 26.1.0 - feat(rustproxy-http)
 add protocol failure suppression, h3 fallback escalation, and protocol cache metrics exposure
 

license

@@ -1,4 +1,4 @@
-Copyright (c) 2019 Lossless GmbH (hello@lossless.com)
+Copyright (c) 2019 Task Venture Capital GmbH (hello@task.vc)
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@push.rocks/smartproxy",
-  "version": "26.1.0",
+  "version": "26.2.4",
   "private": false,
   "description": "A powerful proxy package with unified route-based configuration for high traffic management. Features include SSL/TLS support, flexible routing patterns, WebSocket handling, advanced security options, and automatic ACME certificate management.",
   "main": "dist_ts/index.js",
@@ -16,13 +16,13 @@
     "buildDocs": "tsdoc"
   },
   "devDependencies": {
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+    "@git.zone/tsbuild": "^4.4.0",
-    "@git.zone/tsrun": "^2.0.1",
+    "@git.zone/tsrun": "^2.0.2",
-    "@git.zone/tsrust": "^1.3.0",
+    "@git.zone/tsrust": "^1.3.2",
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+    "@git.zone/tstest": "^3.6.0",
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+    "@push.rocks/smartserve": "^2.0.3",
     "@types/node": "^25.5.0",
-    "typescript": "^5.9.3",
+    "typescript": "^6.0.2",
     "why-is-node-running": "^3.2.2"
   },
   "dependencies": {
@@ -41,7 +41,7 @@
     "dist_ts_web/**/*",
     "assets/**/*",
     "cli.js",
-    "npmextra.json",
+    ".smartconfig.json",
     "readme.md",
     "changelog.md"
   ],

pnpm-lock.yaml

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-  '@rolldown/binding-openharmony-arm64@1.0.0-beta.52':
+  '@rolldown/binding-openharmony-arm64@1.0.0-rc.11':
-    resolution: {integrity: sha512-1BNQW8u4ro8bsN1+tgKENJiqmvc+WfuaUhXzMImOVSMw28pkBKdfZtX2qJPADV3terx+vNJtlsgSGeb3+W6Jiw==}
+    resolution: {integrity: sha512-mcp3Rio2w72IvdZG0oQ4bM2c2oumtwHfUfKncUM6zGgz0KgPz4YmDPQfnXEiY5t3+KD/i8HG2rOB/LxdmieK2g==}
     engines: {node: ^20.19.0 || >=22.12.0}
     cpu: [arm64]
     os: [openharmony]
 
-  '@rolldown/binding-wasm32-wasi@1.0.0-beta.52':
+  '@rolldown/binding-wasm32-wasi@1.0.0-rc.11':
-    resolution: {integrity: sha512-K/p7clhCqJOQpXGykrFaBX2Dp9AUVIDHGc+PtFGBwg7V+mvBTv/tsm3LC3aUmH02H2y3gz4y+nUTQ0MLpofEEg==}
+    resolution: {integrity: sha512-LXk5Hii1Ph9asuGRjBuz8TUxdc1lWzB7nyfdoRgI0WGPZKmCxvlKk8KfYysqtr4MfGElu/f/pEQRh8fcEgkrWw==}
     engines: {node: '>=14.0.0'}
     cpu: [wasm32]
 
-  '@rolldown/binding-win32-arm64-msvc@1.0.0-beta.52':
+  '@rolldown/binding-win32-arm64-msvc@1.0.0-rc.11':
-    resolution: {integrity: sha512-a4EkXBtnYYsKipjS7QOhEBM4bU5IlR9N1hU+JcVEVeuTiaslIyhWVKsvf7K2YkQHyVAJ+7/A9BtrGqORFcTgng==}
+    resolution: {integrity: sha512-dDwf5otnx0XgRY1yqxOC4ITizcdzS/8cQ3goOWv3jFAo4F+xQYni+hnMuO6+LssHHdJW7+OCVL3CoU4ycnh35Q==}
     engines: {node: ^20.19.0 || >=22.12.0}
     cpu: [arm64]
     os: [win32]
 
-  '@rolldown/binding-win32-ia32-msvc@1.0.0-beta.52':
+  '@rolldown/binding-win32-x64-msvc@1.0.0-rc.11':
-    resolution: {integrity: sha512-5ZXcYyd4GxPA6QfbGrNcQjmjbuLGvfz6728pZMsQvGHI+06LT06M6TPtXvFvLgXtexc+OqvFe1yAIXJU1gob/w==}
+    resolution: {integrity: sha512-LN4/skhSggybX71ews7dAj6r2geaMJfm3kMbK2KhFMg9B10AZXnKoLCVVgzhMHL0S+aKtr4p8QbAW8k+w95bAA==}
-    engines: {node: ^20.19.0 || >=22.12.0}
-    cpu: [ia32]
-    os: [win32]
-
-  '@rolldown/binding-win32-x64-msvc@1.0.0-beta.52':
-    resolution: {integrity: sha512-tzpnRQXJrSzb8Z9sm97UD3cY0toKOImx+xRKsDLX4zHaAlRXWh7jbaKBePJXEN7gNw7Nm03PBNwphdtA8KSUYQ==}
     engines: {node: ^20.19.0 || >=22.12.0}
     cpu: [x64]
     os: [win32]
 
-  '@rolldown/pluginutils@1.0.0-beta.52':
+  '@rolldown/pluginutils@1.0.0-rc.11':
-    resolution: {integrity: sha512-/L0htLJZbaZFL1g9OHOblTxbCYIGefErJjtYOwgl9ZqNx27P3L0SDfjhhHIss32gu5NWgnxuT2a2Hnnv6QGHKA==}
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-  '@rspack/binding-darwin-arm64@1.7.9':
+  '@rspack/binding-darwin-arm64@1.7.10':
-    resolution: {integrity: sha512-64dgstte0If5czi9bA/cpOe0ryY6wC9AIQRtyJ3DlOF6Tt+y9cKkmUoGu3V+WYaYIZRT7HNk8V7kL8amVjFTYw==}
+    resolution: {integrity: sha512-bsXi7I6TpH+a4L6okIUh1JDvwT+XcK/L7Yvhu5G2t5YYyd2fl5vMM5O9cePRpEb0RdqJZ3Z8i9WIWHap9aQ8Gw==}
     cpu: [arm64]
     os: [darwin]
 
-  '@rspack/binding-darwin-x64@1.7.9':
+  '@rspack/binding-darwin-x64@1.7.10':
-    resolution: {integrity: sha512-2QSLs3w4rLy4UUGVnIlkt6IlIKOzR1e0RPsq2FYQW6s3p9JrwRCtOeHohyh7EJSqF54dtfhe9UZSAwba3LqH1Q==}
+    resolution: {integrity: sha512-h/kOGL1bUflDDYnbiUjaRE9kagJpour4FatGihueV03+cRGQ6jpde+BjUakqzMx65CeDbeYI6jAiPhElnlAtRw==}
     cpu: [x64]
     os: [darwin]
 
-  '@rspack/binding-linux-arm64-gnu@1.7.9':
+  '@rspack/binding-linux-arm64-gnu@1.7.10':
-    resolution: {integrity: sha512-qhUGI/uVfvLmKWts4QkVHGL8yfUyJkblZs+OFD5Upa2y676EOsbQgWsCwX4xGB6Tv+TOzFP0SLh/UfO8ZfdE+w==}
+    resolution: {integrity: sha512-Z4reus7UxGM4+JuhiIht8KuGP1KgM7nNhOlXUHcQCMswP/Rymj5oJQN3TDWgijFUZs09ULl8t3T+AQAVTd/WvA==}
     cpu: [arm64]
     os: [linux]
 
-  '@rspack/binding-linux-arm64-musl@1.7.9':
+  '@rspack/binding-linux-arm64-musl@1.7.10':
-    resolution: {integrity: sha512-VjfmR1hgO9n3L6MaE5KG+DXSrrLVqHHOkVcOtS2LMq3bjMTwbBywY7ycymcLnX5KJsol8d3ZGYep6IfSOt3lFA==}
+    resolution: {integrity: sha512-LYaoVmWizG4oQ3g+St3eM5qxsyfH07kLirP7NJcDMgvu3eQ29MeyTZ3ugkgW6LvlmJue7eTQyf6CZlanoF5SSg==}
     cpu: [arm64]
     os: [linux]
 
-  '@rspack/binding-linux-x64-gnu@1.7.9':
+  '@rspack/binding-linux-x64-gnu@1.7.10':
-    resolution: {integrity: sha512-0kldV+3WTs/VYDWzxJ7K40hCW26IHtnk8xPK3whKoo1649rgeXXa0EdsU5P7hG8Ef5SWQjHHHZ/fuHYSO3Y6HA==}
+    resolution: {integrity: sha512-aIm2G4Kcm3qxDTNqKarK0oaLY2iXnCmpRQQhAcMlR0aS2LmxL89XzVeRr9GFA1MzGrAsZONWCLkxQvn3WUbm4Q==}
     cpu: [x64]
     os: [linux]
 
-  '@rspack/binding-linux-x64-musl@1.7.9':
+  '@rspack/binding-linux-x64-musl@1.7.10':
-    resolution: {integrity: sha512-Gi4872cFtc2d83FKATR6Qcf2VBa/tFCqffI/IwRRl6Hx5FulEBqx+tH7gAuRVF693vrbXNxK+FQ+k4iEsEJxrw==}
+    resolution: {integrity: sha512-SIHQbAgB9IPH0H3H+i5rN5jo9yA/yTMq8b7XfRkTMvZ7P7MXxJ0dE8EJu3BmCLM19sqnTc2eX+SVfE8ZMDzghA==}
     cpu: [x64]
     os: [linux]
 
-  '@rspack/binding-wasm32-wasi@1.7.9':
+  '@rspack/binding-wasm32-wasi@1.7.10':
-    resolution: {integrity: sha512-5QEzqo6EaolpuZmK6w/mgSueorgGnnzp7dJaAvBj6ECFIg/aLXhXXmWCWbxt7Ws2gKvG5/PgaxDqbUxYL51juA==}
+    resolution: {integrity: sha512-J9HDXHD1tj+9FmX4+K3CTkO7dCE2bootlR37YuC2Owc0Lwl1/i2oGT71KHnMqI9faF/hipAaQM5OywkiiuNB7w==}
     cpu: [wasm32]
 
-  '@rspack/binding-win32-arm64-msvc@1.7.9':
+  '@rspack/binding-win32-arm64-msvc@1.7.10':
-    resolution: {integrity: sha512-MMqvcrIc8aOqTuHjWkjdzilvoZ3Hv07Od0Foogiyq3JMudsS3Wcmh7T1dFerGg19MOJcRUeEkrg2NQOMOQ6xDA==}
+    resolution: {integrity: sha512-FaQGSCXH89nMOYW0bVp0bKQDQbrOEFFm7yedla7g6mkWlFVQo5UyBxid5wJUCqGJBtJepRxeRfByWiaI5nVGvg==}
     cpu: [arm64]
     os: [win32]
 
-  '@rspack/binding-win32-ia32-msvc@1.7.9':
+  '@rspack/binding-win32-ia32-msvc@1.7.10':
-    resolution: {integrity: sha512-4kYYS+NZ2CuNbKjq40yB/UEyB51o1PHj5wpr+Y943oOJXpEKWU2Q4vkF8VEohPEcnA9cKVotYCnqStme+02suA==}
+    resolution: {integrity: sha512-/66TNLOeM4R5dHhRWRVbMTgWghgxz+32ym0c/zGGXQRoMbz7210EoL40ALUgdBdeeREO8LoV+Mn7v8/QZCwHzw==}
     cpu: [ia32]
     os: [win32]
 
-  '@rspack/binding-win32-x64-msvc@1.7.9':
+  '@rspack/binding-win32-x64-msvc@1.7.10':
-    resolution: {integrity: sha512-1g+QyXXvs+838Un/4GaUvJfARDGHMCs15eXDYWBl5m/Skubyng8djWAgr6ag1+cVoJZXCPOvybTItcblWF3gbQ==}
+    resolution: {integrity: sha512-SUa3v1W7PGFCy6AHRmDsm43/tkfaZFi1TN2oIk5aCdT9T51baDVBjAbehRDu9xFbK4piL3k7uqIVSIrKgVqk1g==}
     cpu: [x64]
     os: [win32]
 
-  '@rspack/binding@1.7.9':
+  '@rspack/binding@1.7.10':
-    resolution: {integrity: sha512-A56e0NdfNwbOSJoilMkxzaPuVYaKCNn1shuiwWnCIBmhV9ix1n9S1XvquDjkGyv+gCdR1+zfJBOa5DMB7htLHw==}
+    resolution: {integrity: sha512-j+DPEaSJLRgasxXNpYQpvC7wUkQF5WoWPiTfm4fLczwlAmYwGSVkJiyWDrOlvVPiGGYiXIaXEjVWTw6fT6/vnA==}
 
-  '@rspack/core@1.7.9':
+  '@rspack/core@1.7.10':
-    resolution: {integrity: sha512-VHuSKvRkuv42Ya+TxEGO0LE0r9+8P4tKGokmomj4R1f/Nu2vtS3yoaIMfC4fR6VuHGd3MZ+KTI0cNNwHfFcskw==}
+    resolution: {integrity: sha512-dO7J0aHSa9Fg2kGT0+ZsM500lMdlNIyCHavIaz7dTDn6KXvFz1qbWQ/48x3OlNFw1mA0jxAjjw9e7h3sWQZUNg==}
     engines: {node: '>=18.12.0'}
     peerDependencies:
       '@swc/helpers': '>=0.5.1'
@@ -2933,8 +2942,8 @@ packages:
     resolution: {integrity: sha512-JZkJMZkAGFFPP2YqXZXPbMlMBgsxzE8ILs4lMIX/2o0L9UBw9O/Y3o6wFw/i9YLapcUJWwqbi3kdxIPdC62TIA==}
     hasBin: true
 
-  rolldown@1.0.0-beta.52:
+  rolldown@1.0.0-rc.11:
-    resolution: {integrity: sha512-Hbnpljue+JhMJrlOjQ1ixp9me7sUec7OjFvS+A1Qm8k8Xyxmw3ZhxFu7LlSXW1s9AX3POE9W9o2oqCEeR5uDmg==}
+    resolution: {integrity: sha512-NRjoKMusSjfRbSYiH3VSumlkgFe7kYAa3pzVOsVYVFY3zb5d7nS+a3KGQ7hJKXuYWbzJKPVQ9Wxq2UvyK+ENpw==}
     engines: {node: ^20.19.0 || >=22.12.0}
     hasBin: true
 
@@ -2995,8 +3004,8 @@ packages:
     resolution: {integrity: sha512-94hK0Hh8rPqQl2xXc3HsaBoOXKV20MToPkcXvwbISWLEs+64sBq5kFgn2kJDHb1Pry9yrP0dxrCI9RRci7RXKg==}
     engines: {node: '>= 6.0.0', npm: '>= 3.0.0'}
 
-  smol-toml@1.6.0:
+  smol-toml@1.6.1:
-    resolution: {integrity: sha512-4zemZi0HvTnYwLfrpk/CF9LOd9Lt87kAt50GnqhMpyF9U3poDAP2+iukq2bZsO/ufegbYehBkqINbsWxj4l4cw==}
+    resolution: {integrity: sha512-dWUG8F5sIIARXih1DTaQAX4SsiTXhInKf1buxdY9DIg4ZYPZK5nGM1VRIYmEbDbsHt7USo99xSLFu5Q1IqTmsg==}
     engines: {node: '>= 18'}
 
   socks-proxy-agent@8.0.5:
@@ -3162,8 +3171,8 @@ packages:
   typed-query-selector@2.12.1:
     resolution: {integrity: sha512-uzR+FzI8qrUEIu96oaeBJmd9E7CFEiQ3goA5qCVgc4s5llSubcfGHq9yUstZx/k4s9dXHVKsE35YWoFyvEqEHA==}
 
-  typescript@5.9.3:
+  typescript@6.0.2:
-    resolution: {integrity: sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw==}
+    resolution: {integrity: sha512-bGdAIrZ0wiGDo5l8c++HWtbaNCWTS4UTv7RaTH/ThVIgjkveJt83m74bBHMJkuCbslY8ixgLBVZJIOiQlQTjfQ==}
     engines: {node: '>=14.17'}
     hasBin: true
 
@@ -3275,6 +3284,18 @@ packages:
       utf-8-validate:
         optional: true
 
+  ws@8.20.0:
+    resolution: {integrity: sha512-sAt8BhgNbzCtgGbt2OxmpuryO63ZoDk/sqaB/znQm94T4fCEsy/yV+7CdC1kJhOU9lboAEU7R3kquuycDoibVA==}
+    engines: {node: '>=10.0.0'}
+    peerDependencies:
+      bufferutil: ^4.0.1
+      utf-8-validate: '>=5.0.2'
+    peerDependenciesMeta:
+      bufferutil:
+        optional: true
+      utf-8-validate:
+        optional: true
+
   xml-parse-from-string@1.0.1:
     resolution: {integrity: sha512-ErcKwJTF54uRzzNMXq2X5sMIy88zJvfN2DmdoQvy7PAFJ+tPRU6ydWuOKNMyfmOjdyBQTFREi60s0Y0SyI0G0g==}
 
@@ -3938,9 +3959,9 @@ snapshots:
   '@esbuild/win32-x64@0.27.4':
     optional: true
 
-  '@git.zone/tsbuild@4.3.0':
+  '@git.zone/tsbuild@4.4.0':
     dependencies:
-      '@git.zone/tspublish': 1.11.2
+      '@git.zone/tspublish': 1.11.5
       '@push.rocks/early': 4.0.4
       '@push.rocks/smartcli': 4.0.20
       '@push.rocks/smartdelay': 3.0.5
@@ -3949,7 +3970,7 @@ snapshots:
       '@push.rocks/smartlog': 3.2.1
       '@push.rocks/smartpath': 6.0.0
       '@push.rocks/smartpromise': 4.2.3
-      typescript: 5.9.3
+      typescript: 6.0.2
     transitivePeerDependencies:
       - '@nuxt/kit'
       - aws-crt
@@ -3960,11 +3981,11 @@ snapshots:
       - supports-color
       - vue
 
-  '@git.zone/tsbundle@2.9.1':
+  '@git.zone/tsbundle@2.10.0':
     dependencies:
       '@push.rocks/early': 4.0.4
-      '@push.rocks/npmextra': 5.3.3
       '@push.rocks/smartcli': 4.0.20
+      '@push.rocks/smartconfig': 6.1.0
       '@push.rocks/smartdelay': 3.0.5
       '@push.rocks/smartfs': 1.5.0
       '@push.rocks/smartinteract': 2.0.16
@@ -3973,12 +3994,12 @@ snapshots:
       '@push.rocks/smartpath': 6.0.0
       '@push.rocks/smartpromise': 4.2.3
       '@push.rocks/smartspawn': 3.0.3
-      '@rspack/core': 1.7.9
+      '@rspack/core': 1.7.10
       '@types/html-minifier': 4.0.6
       esbuild: 0.27.4
       html-minifier: 4.0.0
-      rolldown: 1.0.0-beta.52
+      rolldown: 1.0.0-rc.11
-      typescript: 5.9.3
+      typescript: 6.0.2
     transitivePeerDependencies:
       - '@nuxt/kit'
       - '@swc/helpers'
@@ -3986,11 +4007,11 @@ snapshots:
       - supports-color
       - vue
 
-  '@git.zone/tspublish@1.11.2':
+  '@git.zone/tspublish@1.11.5':
     dependencies:
       '@push.rocks/consolecolor': 2.0.3
-      '@push.rocks/npmextra': 5.3.3
       '@push.rocks/smartcli': 4.0.20
+      '@push.rocks/smartconfig': 6.1.0
       '@push.rocks/smartdelay': 3.0.5
       '@push.rocks/smartfile': 13.1.2
       '@push.rocks/smartfs': 1.5.0
@@ -4009,34 +4030,34 @@ snapshots:
       - supports-color
       - vue
 
-  '@git.zone/tsrun@2.0.1':
+  '@git.zone/tsrun@2.0.2':
     dependencies:
       '@push.rocks/smartfile': 13.1.2
       '@push.rocks/smartshell': 3.3.8
       tsx: 4.21.0
 
-  '@git.zone/tsrust@1.3.0':
+  '@git.zone/tsrust@1.3.2':
     dependencies:
       '@push.rocks/early': 4.0.4
-      '@push.rocks/npmextra': 5.3.3
       '@push.rocks/smartcli': 4.0.20
+      '@push.rocks/smartconfig': 6.1.0
       '@push.rocks/smartfile': 13.1.2
       '@push.rocks/smartpath': 6.0.0
       '@push.rocks/smartshell': 3.3.8
-      smol-toml: 1.6.0
+      smol-toml: 1.6.1
     transitivePeerDependencies:
       - '@nuxt/kit'
       - react
       - supports-color
       - vue
 
-  '@git.zone/tstest@3.5.0(socks@2.8.7)(typescript@5.9.3)':
+  '@git.zone/tstest@3.6.0(socks@2.8.7)(typescript@6.0.2)':
     dependencies:
-      '@git.zone/tsbundle': 2.9.1
+      '@git.zone/tsbundle': 2.10.0
-      '@git.zone/tsrun': 2.0.1
+      '@git.zone/tsrun': 2.0.2
       '@push.rocks/consolecolor': 2.0.3
       '@push.rocks/qenv': 6.1.3
-      '@push.rocks/smartbrowser': 2.0.11(typescript@5.9.3)
+      '@push.rocks/smartbrowser': 2.0.11(typescript@6.0.2)
       '@push.rocks/smartcrypto': 2.0.4
       '@push.rocks/smartdelay': 3.0.5
       '@push.rocks/smartenv': 6.0.0
@@ -4050,14 +4071,14 @@ snapshots:
       '@push.rocks/smartpath': 6.0.0
       '@push.rocks/smartpromise': 4.2.3
       '@push.rocks/smartrequest': 5.0.1
-      '@push.rocks/smartserve': 2.0.1
+      '@push.rocks/smartserve': 2.0.3
       '@push.rocks/smartshell': 3.3.8
-      '@push.rocks/smartstorage': 6.0.1
+      '@push.rocks/smartstorage': 6.3.2
       '@push.rocks/smarttime': 4.2.3
-      '@push.rocks/smartwatch': 6.3.0
+      '@push.rocks/smartwatch': 6.4.0
       '@types/ws': 8.18.1
       figures: 6.1.0
-      ws: 8.19.0
+      ws: 8.20.0
     transitivePeerDependencies:
       - '@aws-sdk/credential-providers'
       - '@mongodb-js/zstd'
@@ -4513,7 +4534,7 @@ snapshots:
       '@tybys/wasm-util': 0.10.1
     optional: true
 
-  '@oxc-project/types@0.99.0': {}
+  '@oxc-project/types@0.122.0': {}
 
   '@pdf-lib/standard-fonts@1.0.0':
     dependencies:
@@ -4684,6 +4705,15 @@ snapshots:
       '@types/symbol-tree': 3.2.5
       symbol-tree: 3.2.4
 
+  '@push.rocks/lik@6.4.0':
+    dependencies:
+      '@push.rocks/smartdelay': 3.0.5
+      '@push.rocks/smartmatch': 2.0.0
+      '@push.rocks/smartpromise': 4.2.3
+      '@push.rocks/smartrx': 3.0.10
+      '@push.rocks/smarttime': 4.2.3
+      symbol-tree: 3.2.4
+
   '@push.rocks/mongodump@1.1.0(socks@2.8.7)':
     dependencies:
       '@push.rocks/lik': 6.3.1
@@ -4702,23 +4732,6 @@ snapshots:
       - snappy
       - socks
 
-  '@push.rocks/npmextra@5.3.3':
-    dependencies:
-      '@push.rocks/qenv': 6.1.3
-      '@push.rocks/smartfile': 11.2.7
-      '@push.rocks/smartjson': 5.2.0
-      '@push.rocks/smartlog': 3.2.1
-      '@push.rocks/smartpath': 6.0.0
-      '@push.rocks/smartpromise': 4.2.3
-      '@push.rocks/smartrx': 3.0.10
-      '@push.rocks/taskbuffer': 3.5.0
-      '@tsclass/tsclass': 9.5.0
-    transitivePeerDependencies:
-      - '@nuxt/kit'
-      - react
-      - supports-color
-      - vue
-
   '@push.rocks/qenv@6.1.3':
     dependencies:
       '@api.global/typedrequest': 3.2.5
@@ -4748,11 +4761,11 @@ snapshots:
       - react-native-b4a
       - supports-color
 
-  '@push.rocks/smartbrowser@2.0.11(typescript@5.9.3)':
+  '@push.rocks/smartbrowser@2.0.11(typescript@6.0.2)':
     dependencies:
       '@push.rocks/smartdelay': 3.0.5
-      '@push.rocks/smartpdf': 4.2.0(typescript@5.9.3)
+      '@push.rocks/smartpdf': 4.2.0(typescript@6.0.2)
-      '@push.rocks/smartpuppeteer': 2.0.5(typescript@5.9.3)
+      '@push.rocks/smartpuppeteer': 2.0.5(typescript@6.0.2)
       '@push.rocks/smartunique': 3.0.9
     transitivePeerDependencies:
       - '@nuxt/kit'
@@ -4811,6 +4824,23 @@ snapshots:
       '@push.rocks/smarturl': 3.1.0
       '@push.rocks/webrequest': 4.0.5
 
+  '@push.rocks/smartconfig@6.1.0':
+    dependencies:
+      '@push.rocks/qenv': 6.1.3
+      '@push.rocks/smartfile': 11.2.7
+      '@push.rocks/smartjson': 5.2.0
+      '@push.rocks/smartlog': 3.2.1
+      '@push.rocks/smartpath': 6.0.0
+      '@push.rocks/smartpromise': 4.2.3
+      '@push.rocks/smartrx': 3.0.10
+      '@push.rocks/taskbuffer': 3.5.0
+      '@tsclass/tsclass': 9.5.0
+    transitivePeerDependencies:
+      - '@nuxt/kit'
+      - react
+      - supports-color
+      - vue
+
   '@push.rocks/smartcrypto@2.0.4':
     dependencies:
       '@push.rocks/smartpromise': 4.2.3
@@ -5131,7 +5161,7 @@ snapshots:
 
   '@push.rocks/smartpath@6.0.0': {}
 
-  '@push.rocks/smartpdf@4.2.0(typescript@5.9.3)':
+  '@push.rocks/smartpdf@4.2.0(typescript@6.0.2)':
     dependencies:
       '@push.rocks/smartbuffer': 3.0.5
       '@push.rocks/smartdelay': 3.0.5
@@ -5140,8 +5170,8 @@ snapshots:
       '@push.rocks/smartnetwork': 4.4.0
       '@push.rocks/smartpath': 6.0.0
       '@push.rocks/smartpromise': 4.2.3
-      '@push.rocks/smartpuppeteer': 2.0.5(typescript@5.9.3)
+      '@push.rocks/smartpuppeteer': 2.0.5(typescript@6.0.2)
-      '@push.rocks/smartserve': 2.0.1
+      '@push.rocks/smartserve': 2.0.3
       '@push.rocks/smartunique': 3.0.9
       '@tsclass/tsclass': 9.5.0
       pdf-lib: 1.17.1
@@ -5166,11 +5196,11 @@ snapshots:
 
   '@push.rocks/smartpromise@4.2.3': {}
 
-  '@push.rocks/smartpuppeteer@2.0.5(typescript@5.9.3)':
+  '@push.rocks/smartpuppeteer@2.0.5(typescript@6.0.2)':
     dependencies:
       '@push.rocks/smartdelay': 3.0.5
       '@push.rocks/smartshell': 3.3.8
-      puppeteer: 24.40.0(typescript@5.9.3)
+      puppeteer: 24.40.0(typescript@6.0.2)
       tree-kill: 1.2.2
     transitivePeerDependencies:
       - bare-abort-controller
@@ -5221,7 +5251,7 @@ snapshots:
       '@push.rocks/smartpromise': 4.2.3
       rxjs: 7.8.2
 
-  '@push.rocks/smartserve@2.0.1':
+  '@push.rocks/smartserve@2.0.3':
     dependencies:
       '@api.global/typedrequest': 3.2.5
       '@cfworker/json-schema': 4.1.1
@@ -5260,7 +5290,7 @@ snapshots:
       '@push.rocks/smartrx': 3.0.10
       '@push.rocks/webstore': 2.0.20
 
-  '@push.rocks/smartstorage@6.0.1':
+  '@push.rocks/smartstorage@6.3.2':
     dependencies:
       '@push.rocks/smartpath': 6.0.0
       '@push.rocks/smartrust': 1.3.2
@@ -5301,11 +5331,12 @@ snapshots:
       '@types/semver': 7.7.1
       semver: 7.7.4
 
-  '@push.rocks/smartwatch@6.3.0':
+  '@push.rocks/smartwatch@6.4.0':
     dependencies:
-      '@push.rocks/lik': 6.3.1
+      '@push.rocks/lik': 6.4.0
       '@push.rocks/smartenv': 6.0.0
       '@push.rocks/smartpromise': 4.2.3
+      '@push.rocks/smartrust': 1.3.2
       '@push.rocks/smartrx': 3.0.10
       chokidar: 5.0.0
       picomatch: 4.0.3
@@ -5374,101 +5405,104 @@ snapshots:
 
   '@pushrocks/smartpromise@4.0.2': {}
 
-  '@rolldown/binding-android-arm64@1.0.0-beta.52':
+  '@rolldown/binding-android-arm64@1.0.0-rc.11':
     optional: true
 
-  '@rolldown/binding-darwin-arm64@1.0.0-beta.52':
+  '@rolldown/binding-darwin-arm64@1.0.0-rc.11':
     optional: true
 
-  '@rolldown/binding-darwin-x64@1.0.0-beta.52':
+  '@rolldown/binding-darwin-x64@1.0.0-rc.11':
     optional: true
 
-  '@rolldown/binding-freebsd-x64@1.0.0-beta.52':
+  '@rolldown/binding-freebsd-x64@1.0.0-rc.11':
     optional: true
 
-  '@rolldown/binding-linux-arm-gnueabihf@1.0.0-beta.52':
+  '@rolldown/binding-linux-arm-gnueabihf@1.0.0-rc.11':
     optional: true
 
-  '@rolldown/binding-linux-arm64-gnu@1.0.0-beta.52':
+  '@rolldown/binding-linux-arm64-gnu@1.0.0-rc.11':
     optional: true
 
-  '@rolldown/binding-linux-arm64-musl@1.0.0-beta.52':
+  '@rolldown/binding-linux-arm64-musl@1.0.0-rc.11':
     optional: true
 
-  '@rolldown/binding-linux-x64-gnu@1.0.0-beta.52':
+  '@rolldown/binding-linux-ppc64-gnu@1.0.0-rc.11':
     optional: true
 
-  '@rolldown/binding-linux-x64-musl@1.0.0-beta.52':
+  '@rolldown/binding-linux-s390x-gnu@1.0.0-rc.11':
     optional: true
 
-  '@rolldown/binding-openharmony-arm64@1.0.0-beta.52':
+  '@rolldown/binding-linux-x64-gnu@1.0.0-rc.11':
     optional: true
 
-  '@rolldown/binding-wasm32-wasi@1.0.0-beta.52':
+  '@rolldown/binding-linux-x64-musl@1.0.0-rc.11':
+    optional: true
+
+  '@rolldown/binding-openharmony-arm64@1.0.0-rc.11':
+    optional: true
+
+  '@rolldown/binding-wasm32-wasi@1.0.0-rc.11':
     dependencies:
       '@napi-rs/wasm-runtime': 1.1.1
     optional: true
 
-  '@rolldown/binding-win32-arm64-msvc@1.0.0-beta.52':
+  '@rolldown/binding-win32-arm64-msvc@1.0.0-rc.11':
     optional: true
 
-  '@rolldown/binding-win32-ia32-msvc@1.0.0-beta.52':
+  '@rolldown/binding-win32-x64-msvc@1.0.0-rc.11':
     optional: true
 
-  '@rolldown/binding-win32-x64-msvc@1.0.0-beta.52':
+  '@rolldown/pluginutils@1.0.0-rc.11': {}
+
+  '@rspack/binding-darwin-arm64@1.7.10':
     optional: true
 
-  '@rolldown/pluginutils@1.0.0-beta.52': {}
+  '@rspack/binding-darwin-x64@1.7.10':
-
-  '@rspack/binding-darwin-arm64@1.7.9':
     optional: true
 
-  '@rspack/binding-darwin-x64@1.7.9':
+  '@rspack/binding-linux-arm64-gnu@1.7.10':
     optional: true
 
-  '@rspack/binding-linux-arm64-gnu@1.7.9':
+  '@rspack/binding-linux-arm64-musl@1.7.10':
     optional: true
 
-  '@rspack/binding-linux-arm64-musl@1.7.9':
+  '@rspack/binding-linux-x64-gnu@1.7.10':
     optional: true
 
-  '@rspack/binding-linux-x64-gnu@1.7.9':
+  '@rspack/binding-linux-x64-musl@1.7.10':
     optional: true
 
-  '@rspack/binding-linux-x64-musl@1.7.9':
+  '@rspack/binding-wasm32-wasi@1.7.10':
-    optional: true
-
-  '@rspack/binding-wasm32-wasi@1.7.9':
     dependencies:
       '@napi-rs/wasm-runtime': 1.0.7
     optional: true
 
-  '@rspack/binding-win32-arm64-msvc@1.7.9':
+  '@rspack/binding-win32-arm64-msvc@1.7.10':
     optional: true
 
-  '@rspack/binding-win32-ia32-msvc@1.7.9':
+  '@rspack/binding-win32-ia32-msvc@1.7.10':
     optional: true
 
-  '@rspack/binding-win32-x64-msvc@1.7.9':
+  '@rspack/binding-win32-x64-msvc@1.7.10':
     optional: true
 
-  '@rspack/binding@1.7.9':
+  '@rspack/binding@1.7.10':
     optionalDependencies:
-      '@rspack/binding-darwin-arm64': 1.7.9
+      '@rspack/binding-darwin-arm64': 1.7.10
-      '@rspack/binding-darwin-x64': 1.7.9
+      '@rspack/binding-darwin-x64': 1.7.10
-      '@rspack/binding-linux-arm64-gnu': 1.7.9
+      '@rspack/binding-linux-arm64-gnu': 1.7.10
-      '@rspack/binding-linux-arm64-musl': 1.7.9
+      '@rspack/binding-linux-arm64-musl': 1.7.10
-      '@rspack/binding-linux-x64-gnu': 1.7.9
+      '@rspack/binding-linux-x64-gnu': 1.7.10
-      '@rspack/binding-linux-x64-musl': 1.7.9
+      '@rspack/binding-linux-x64-musl': 1.7.10
-      '@rspack/binding-wasm32-wasi': 1.7.9
+      '@rspack/binding-wasm32-wasi': 1.7.10
-      '@rspack/binding-win32-arm64-msvc': 1.7.9
+      '@rspack/binding-win32-arm64-msvc': 1.7.10
-      '@rspack/binding-win32-ia32-msvc': 1.7.9
+      '@rspack/binding-win32-ia32-msvc': 1.7.10
-      '@rspack/binding-win32-x64-msvc': 1.7.9
+      '@rspack/binding-win32-x64-msvc': 1.7.10
 
-  '@rspack/core@1.7.9':
+  '@rspack/core@1.7.10':
     dependencies:
       '@module-federation/runtime-tools': 0.22.0
-      '@rspack/binding': 1.7.9
+      '@rspack/binding': 1.7.10
       '@rspack/lite-tapable': 1.1.0
 
   '@rspack/lite-tapable@1.1.0': {}
@@ -6191,14 +6225,14 @@ snapshots:
       ini: 1.3.8
       proto-list: 1.2.4
 
-  cosmiconfig@9.0.1(typescript@5.9.3):
+  cosmiconfig@9.0.1(typescript@6.0.2):
     dependencies:
       env-paths: 2.2.1
       import-fresh: 3.3.1
       js-yaml: 4.1.1
       parse-json: 5.2.0
     optionalDependencies:
-      typescript: 5.9.3
+      typescript: 6.0.2
 
   croner@10.0.1: {}
 
@@ -7438,7 +7472,7 @@ snapshots:
       devtools-protocol: 0.0.1581282
       typed-query-selector: 2.12.1
       webdriver-bidi-protocol: 0.4.1
-      ws: 8.19.0
+      ws: 8.20.0
     transitivePeerDependencies:
       - bare-abort-controller
       - bare-buffer
@@ -7447,11 +7481,11 @@ snapshots:
       - supports-color
       - utf-8-validate
 
-  puppeteer@24.40.0(typescript@5.9.3):
+  puppeteer@24.40.0(typescript@6.0.2):
     dependencies:
       '@puppeteer/browsers': 2.13.0
       chromium-bidi: 14.0.0(devtools-protocol@0.0.1581282)
-      cosmiconfig: 9.0.1(typescript@5.9.3)
+      cosmiconfig: 9.0.1(typescript@6.0.2)
       devtools-protocol: 0.0.1581282
       puppeteer-core: 24.40.0
       typed-query-selector: 2.12.1
@@ -7570,25 +7604,26 @@ snapshots:
     dependencies:
       glob: 7.2.3
 
-  rolldown@1.0.0-beta.52:
+  rolldown@1.0.0-rc.11:
     dependencies:
-      '@oxc-project/types': 0.99.0
+      '@oxc-project/types': 0.122.0
-      '@rolldown/pluginutils': 1.0.0-beta.52
+      '@rolldown/pluginutils': 1.0.0-rc.11
     optionalDependencies:
-      '@rolldown/binding-android-arm64': 1.0.0-beta.52
+      '@rolldown/binding-android-arm64': 1.0.0-rc.11
-      '@rolldown/binding-darwin-arm64': 1.0.0-beta.52
+      '@rolldown/binding-darwin-arm64': 1.0.0-rc.11
-      '@rolldown/binding-darwin-x64': 1.0.0-beta.52
+      '@rolldown/binding-darwin-x64': 1.0.0-rc.11
-      '@rolldown/binding-freebsd-x64': 1.0.0-beta.52
+      '@rolldown/binding-freebsd-x64': 1.0.0-rc.11
-      '@rolldown/binding-linux-arm-gnueabihf': 1.0.0-beta.52
+      '@rolldown/binding-linux-arm-gnueabihf': 1.0.0-rc.11
-      '@rolldown/binding-linux-arm64-gnu': 1.0.0-beta.52
+      '@rolldown/binding-linux-arm64-gnu': 1.0.0-rc.11
-      '@rolldown/binding-linux-arm64-musl': 1.0.0-beta.52
+      '@rolldown/binding-linux-arm64-musl': 1.0.0-rc.11
-      '@rolldown/binding-linux-x64-gnu': 1.0.0-beta.52
+      '@rolldown/binding-linux-ppc64-gnu': 1.0.0-rc.11
-      '@rolldown/binding-linux-x64-musl': 1.0.0-beta.52
+      '@rolldown/binding-linux-s390x-gnu': 1.0.0-rc.11
-      '@rolldown/binding-openharmony-arm64': 1.0.0-beta.52
+      '@rolldown/binding-linux-x64-gnu': 1.0.0-rc.11
-      '@rolldown/binding-wasm32-wasi': 1.0.0-beta.52
+      '@rolldown/binding-linux-x64-musl': 1.0.0-rc.11
-      '@rolldown/binding-win32-arm64-msvc': 1.0.0-beta.52
+      '@rolldown/binding-openharmony-arm64': 1.0.0-rc.11
-      '@rolldown/binding-win32-ia32-msvc': 1.0.0-beta.52
+      '@rolldown/binding-wasm32-wasi': 1.0.0-rc.11
-      '@rolldown/binding-win32-x64-msvc': 1.0.0-beta.52
+      '@rolldown/binding-win32-arm64-msvc': 1.0.0-rc.11
+      '@rolldown/binding-win32-x64-msvc': 1.0.0-rc.11
 
   run-async@3.0.0: {}
 
@@ -7660,7 +7695,7 @@ snapshots:
 
   smart-buffer@4.2.0: {}
 
-  smol-toml@1.6.0: {}
+  smol-toml@1.6.1: {}
 
   socks-proxy-agent@8.0.5:
     dependencies:
@@ -7861,7 +7896,7 @@ snapshots:
 
   typed-query-selector@2.12.1: {}
 
-  typescript@5.9.3: {}
+  typescript@6.0.2: {}
 
   uglify-js@3.19.3: {}
 
@@ -7963,6 +7998,8 @@ snapshots:
 
   ws@8.19.0: {}
 
+  ws@8.20.0: {}
+
   xml-parse-from-string@1.0.1: {}
 
   xml2js@0.5.0:

rust/Cargo.lock

@@ -1270,6 +1270,7 @@ dependencies = [
  "arc-swap",
  "bytes",
  "dashmap",
+ "futures",
  "h3",
  "h3-quinn",
  "http-body",

rust/crates/rustproxy-http/Cargo.toml

@@ -30,3 +30,4 @@ socket2 = { workspace = true }
 quinn = { workspace = true }
 h3 = { workspace = true }
 h3-quinn = { workspace = true }
+futures = { version = "0.3", default-features = false, features = ["std"] }

rust/crates/rustproxy-http/src/connection_pool.rs

@@ -56,7 +56,11 @@ struct PooledH2 {
 }
 
 /// A pooled QUIC/HTTP/3 connection (multiplexed like H2).
+/// Stores the h3 `SendRequest` handle so pool hits skip the h3 SETTINGS handshake.
 pub struct PooledH3 {
+    /// Multiplexed h3 request handle — clone to open a new stream.
+    pub send_request: h3::client::SendRequest<h3_quinn::OpenStreams, Bytes>,
+    /// Raw QUIC connection — kept for liveness probing (close_reason) only.
     pub connection: quinn::Connection,
     pub created_at: Instant,
     pub generation: u64,
@@ -197,7 +201,10 @@ impl ConnectionPool {
 
     /// Try to get a pooled QUIC connection for the given key.
     /// QUIC connections are multiplexed — the connection is shared, not removed.
-    pub fn checkout_h3(&self, key: &PoolKey) -> Option<(quinn::Connection, Duration)> {
+    pub fn checkout_h3(
+        &self,
+        key: &PoolKey,
+    ) -> Option<(h3::client::SendRequest<h3_quinn::OpenStreams, Bytes>, quinn::Connection, Duration)> {
         let entry = self.h3_pool.get(key)?;
         let pooled = entry.value();
         let age = pooled.created_at.elapsed();
@@ -215,13 +222,20 @@ impl ConnectionPool {
             return None;
         }
 
-        Some((pooled.connection.clone(), age))
+        Some((pooled.send_request.clone(), pooled.connection.clone(), age))
     }
 
-    /// Register a QUIC connection in the pool. Returns the generation ID.
+    /// Register a QUIC connection and its h3 SendRequest handle in the pool.
-    pub fn register_h3(&self, key: PoolKey, connection: quinn::Connection) -> u64 {
+    /// Returns the generation ID.
+    pub fn register_h3(
+        &self,
+        key: PoolKey,
+        connection: quinn::Connection,
+        send_request: h3::client::SendRequest<h3_quinn::OpenStreams, Bytes>,
+    ) -> u64 {
         let gen = self.h2_generation.fetch_add(1, Ordering::Relaxed);
         self.h3_pool.insert(key, PooledH3 {
+            send_request,
             connection,
             created_at: Instant::now(),
             generation: gen,

rust/crates/rustproxy-http/src/h3_service.rs

@@ -116,7 +116,7 @@ async fn handle_h3_request(
     cancel: CancellationToken,
 ) -> anyhow::Result<()> {
     // Stream request body from H3 client via an mpsc channel.
-    let (body_tx, body_rx) = tokio::sync::mpsc::channel::<Bytes>(4);
+    let (body_tx, body_rx) = tokio::sync::mpsc::channel::<Bytes>(32);
 
     // Spawn the H3 body reader task with cancellation
     let body_cancel = cancel.clone();
@@ -132,8 +132,7 @@ async fn handle_h3_request(
                 }
             };
             let mut chunk = chunk;
-            let data = Bytes::copy_from_slice(chunk.chunk());
+            let data = chunk.copy_to_bytes(chunk.remaining());
-            chunk.advance(chunk.remaining());
             if body_tx.send(data).await.is_err() {
                 break;
             }
@@ -179,8 +178,8 @@ async fn handle_h3_request(
     while let Some(frame) = resp_body.frame().await {
         match frame {
             Ok(frame) => {
-                if let Some(data) = frame.data_ref() {
+                if let Ok(data) = frame.into_data() {
-                    stream.send_data(Bytes::copy_from_slice(data)).await
+                    stream.send_data(data).await
                         .map_err(|e| anyhow::anyhow!("Failed to send H3 data: {}", e))?;
                 }
             }

rust/crates/rustproxy-http/src/protocol_cache.rs

@@ -1,20 +1,36 @@
-//! Bounded, TTL-based protocol detection cache with generic failure suppression.
+//! Bounded, sliding-TTL protocol detection cache with periodic re-probing and failure suppression.
 //!
 //! Caches the detected protocol (H1, H2, or H3) per backend endpoint and requested
 //! domain (host:port + requested_host). This prevents cache oscillation when multiple
 //! frontend domains share the same backend but differ in protocol support.
 //!
+//! ## Sliding TTL
+//!
+//! Each cache hit refreshes the entry's expiry timer (`last_accessed_at`). Entries
+//! remain valid for up to 1 day of continuous use. Every 5 minutes, the next request
+//! triggers an inline ALPN re-probe to verify the cached protocol is still correct.
+//!
 //! ## Upgrade signals
 //!
 //! - ALPN (TLS handshake) → detects H2 vs H1
 //! - Alt-Svc (response header) → advertises H3
 //!
+//! ## Protocol transitions
+//!
+//! All protocol changes are logged at `info!()` level with the reason:
+//! "Protocol transition: H1 → H2 because periodic ALPN re-probe"
+//!
 //! ## Failure suppression
 //!
 //! When a protocol fails, `record_failure()` prevents upgrade signals from
 //! re-introducing it until an escalating cooldown expires (5s → 10s → ... → 300s).
 //! Within-request escalation is allowed via `can_retry()` after a 5s minimum gap.
 //!
+//! ## Total failure eviction
+//!
+//! When all protocols (H3, H2, H1) fail for a backend, the cache entry is evicted
+//! entirely via `evict()`, forcing a fresh probe on the next request.
+//!
 //! Cascading: when a lower protocol also fails, higher protocol cooldowns are
 //! reduced to 5s remaining (not instant clear), preventing tight retry loops.
 
@@ -22,11 +38,17 @@ use std::sync::Arc;
 use std::time::{Duration, Instant};
 
 use dashmap::DashMap;
-use tracing::debug;
+use tracing::{debug, info};
 
-/// TTL for cached protocol detection results.
+/// Sliding TTL for cached protocol detection results.
-/// After this duration, the next request will re-probe the backend.
+/// Entries that haven't been accessed for this duration are evicted.
-const PROTOCOL_CACHE_TTL: Duration = Duration::from_secs(300); // 5 minutes
+/// Each `get()` call refreshes the timer (sliding window).
+const PROTOCOL_CACHE_TTL: Duration = Duration::from_secs(86400); // 1 day
+
+/// Interval between inline ALPN re-probes for H1/H2 entries.
+/// When a cached entry's `last_probed_at` exceeds this, the next request
+/// triggers an ALPN re-probe to verify the backend still speaks the same protocol.
+const PROTOCOL_REPROBE_INTERVAL: Duration = Duration::from_secs(300); // 5 minutes
 
 /// Maximum number of entries in the protocol cache.
 const PROTOCOL_CACHE_MAX_ENTRIES: usize = 4096;
@@ -37,7 +59,7 @@ const PROTOCOL_CACHE_CLEANUP_INTERVAL: Duration = Duration::from_secs(60);
 /// Minimum cooldown between retry attempts of a failed protocol.
 const PROTOCOL_FAILURE_COOLDOWN: Duration = Duration::from_secs(5);
 
-/// Maximum cooldown (escalation ceiling). Matches cache TTL.
+/// Maximum cooldown (escalation ceiling).
 const PROTOCOL_FAILURE_MAX_COOLDOWN: Duration = Duration::from_secs(300);
 
 /// Consecutive failure count at which cooldown reaches maximum.
@@ -52,12 +74,26 @@ pub enum DetectedProtocol {
     H3,
 }
 
+impl std::fmt::Display for DetectedProtocol {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            DetectedProtocol::H1 => write!(f, "H1"),
+            DetectedProtocol::H2 => write!(f, "H2"),
+            DetectedProtocol::H3 => write!(f, "H3"),
+        }
+    }
+}
+
 /// Result of a protocol cache lookup.
 #[derive(Debug, Clone, Copy)]
 pub struct CachedProtocol {
     pub protocol: DetectedProtocol,
     /// For H3: the port advertised by Alt-Svc (may differ from TCP port).
     pub h3_port: Option<u16>,
+    /// True if the entry's `last_probed_at` exceeds `PROTOCOL_REPROBE_INTERVAL`.
+    /// Caller should perform an inline ALPN re-probe and call `update_probe_result()`.
+    /// Always `false` for H3 entries (H3 is discovered via Alt-Svc, not ALPN).
+    pub needs_reprobe: bool,
 }
 
 /// Key for the protocol cache: (host, port, requested_host).
@@ -70,10 +106,15 @@ pub struct ProtocolCacheKey {
     pub requested_host: Option<String>,
 }
 
-/// A cached protocol detection result with a timestamp.
+/// A cached protocol detection result with timestamps.
 struct CachedEntry {
     protocol: DetectedProtocol,
+    /// When this protocol was first detected (or last changed).
     detected_at: Instant,
+    /// Last time any request used this entry (sliding-window TTL).
+    last_accessed_at: Instant,
+    /// Last time an ALPN re-probe was performed for this entry.
+    last_probed_at: Instant,
     /// For H3: the port advertised by Alt-Svc (may differ from TCP port).
     h3_port: Option<u16>,
 }
@@ -138,6 +179,8 @@ pub struct ProtocolCacheEntry {
     pub protocol: String,
     pub h3_port: Option<u16>,
     pub age_secs: u64,
+    pub last_accessed_secs: u64,
+    pub last_probed_secs: u64,
     pub h2_suppressed: bool,
     pub h3_suppressed: bool,
     pub h2_cooldown_remaining_secs: Option<u64>,
@@ -154,11 +197,11 @@ fn escalate_cooldown(consecutive: u32) -> Duration {
     Duration::from_secs(secs.min(PROTOCOL_FAILURE_MAX_COOLDOWN.as_secs()))
 }
 
-/// Bounded, TTL-based protocol detection cache with failure suppression.
+/// Bounded, sliding-TTL protocol detection cache with failure suppression.
 ///
 /// Memory safety guarantees:
 /// - Hard cap at `PROTOCOL_CACHE_MAX_ENTRIES` — cannot grow unboundedly.
-/// - TTL expiry — stale entries naturally age out on lookup.
+/// - Sliding TTL expiry — entries age out after 1 day without access.
 /// - Background cleanup task — proactively removes expired entries every 60s.
 /// - `clear()` — called on route updates to discard stale detections.
 /// - `Drop` — aborts the background task to prevent dangling tokio tasks.
@@ -190,15 +233,25 @@ impl ProtocolCache {
     }
 
     /// Look up the cached protocol for a backend endpoint.
+    ///
     /// Returns `None` if not cached or expired (caller should probe via ALPN).
+    /// On hit, refreshes `last_accessed_at` (sliding TTL) and sets `needs_reprobe`
+    /// if the entry hasn't been probed in over 5 minutes (H1/H2 only).
     pub fn get(&self, key: &ProtocolCacheKey) -> Option<CachedProtocol> {
-        let entry = self.cache.get(key)?;
+        let mut entry = self.cache.get_mut(key)?;
-        if entry.detected_at.elapsed() < PROTOCOL_CACHE_TTL {
+        if entry.last_accessed_at.elapsed() < PROTOCOL_CACHE_TTL {
-            debug!("Protocol cache hit: {:?} for {}:{} (requested: {:?})",
+            // Refresh sliding TTL
-                entry.protocol, key.host, key.port, key.requested_host);
+            entry.last_accessed_at = Instant::now();
+
+            // H3 is the ceiling — can't ALPN-probe for H3 (discovered via Alt-Svc).
+            // Only H1/H2 entries trigger periodic re-probing.
+            let needs_reprobe = entry.protocol != DetectedProtocol::H3
+                && entry.last_probed_at.elapsed() >= PROTOCOL_REPROBE_INTERVAL;
+
             Some(CachedProtocol {
                 protocol: entry.protocol,
                 h3_port: entry.h3_port,
+                needs_reprobe,
             })
         } else {
             // Expired — remove and return None to trigger re-probe
@@ -214,7 +267,7 @@ impl ProtocolCache {
     /// **Key semantic**: only suppresses if the protocol being inserted matches
     /// a suppressed protocol. H1 inserts are NEVER suppressed — downgrades
     /// always succeed.
-    pub fn insert(&self, key: ProtocolCacheKey, protocol: DetectedProtocol) -> bool {
+    pub fn insert(&self, key: ProtocolCacheKey, protocol: DetectedProtocol, reason: &str) -> bool {
         if self.is_suppressed(&key, protocol) {
             debug!(
                 host = %key.host, port = %key.port, domain = ?key.requested_host,
@@ -223,13 +276,13 @@ impl ProtocolCache {
             );
             return false;
         }
-        self.insert_internal(key, protocol, None);
+        self.insert_internal(key, protocol, None, reason);
         true
     }
 
     /// Insert an H3 detection result with the Alt-Svc advertised port.
     /// Returns `false` if H3 is suppressed.
-    pub fn insert_h3(&self, key: ProtocolCacheKey, h3_port: u16) -> bool {
+    pub fn insert_h3(&self, key: ProtocolCacheKey, h3_port: u16, reason: &str) -> bool {
         if self.is_suppressed(&key, DetectedProtocol::H3) {
             debug!(
                 host = %key.host, port = %key.port, domain = ?key.requested_host,
@@ -237,10 +290,54 @@ impl ProtocolCache {
             );
             return false;
         }
-        self.insert_internal(key, DetectedProtocol::H3, Some(h3_port));
+        self.insert_internal(key, DetectedProtocol::H3, Some(h3_port), reason);
         true
     }
 
+    /// Update the cache after an inline ALPN re-probe completes.
+    ///
+    /// Always updates `last_probed_at`. If the protocol changed, logs the transition
+    /// and updates the entry. Returns `Some(new_protocol)` if changed, `None` if unchanged.
+    pub fn update_probe_result(
+        &self,
+        key: &ProtocolCacheKey,
+        probed_protocol: DetectedProtocol,
+        reason: &str,
+    ) -> Option<DetectedProtocol> {
+        if let Some(mut entry) = self.cache.get_mut(key) {
+            let old_protocol = entry.protocol;
+            entry.last_probed_at = Instant::now();
+            entry.last_accessed_at = Instant::now();
+
+            if old_protocol != probed_protocol {
+                info!(
+                    host = %key.host, port = %key.port, domain = ?key.requested_host,
+                    old = %old_protocol, new = %probed_protocol, reason = %reason,
+                    "Protocol transition"
+                );
+                entry.protocol = probed_protocol;
+                entry.detected_at = Instant::now();
+                // Clear h3_port if downgrading from H3
+                if old_protocol == DetectedProtocol::H3 && probed_protocol != DetectedProtocol::H3 {
+                    entry.h3_port = None;
+                }
+                return Some(probed_protocol);
+            }
+
+            debug!(
+                host = %key.host, port = %key.port, domain = ?key.requested_host,
+                protocol = %old_protocol, reason = %reason,
+                "Re-probe confirmed — no protocol change"
+            );
+            None
+        } else {
+            // Entry was evicted between the get() and the probe completing.
+            // Insert as a fresh entry.
+            self.insert_internal(key.clone(), probed_protocol, None, reason);
+            Some(probed_protocol)
+        }
+    }
+
     /// Record a protocol failure. Future `insert()` calls for this protocol
     /// will be suppressed until the escalating cooldown expires.
     ///
@@ -281,7 +378,7 @@ impl ProtocolCache {
             Self::reduce_cooldown_to(entry.h3.as_mut(), PROTOCOL_FAILURE_COOLDOWN);
         }
 
-        debug!(
+        info!(
             host = %key.host, port = %key.port, domain = ?key.requested_host,
             protocol = ?protocol,
             consecutive = consecutive,
@@ -348,6 +445,17 @@ impl ProtocolCache {
         }
     }
 
+    /// Evict a cache entry entirely. Called when all protocol probes (H3, H2, H1)
+    /// have failed for a backend.
+    pub fn evict(&self, key: &ProtocolCacheKey) {
+        self.cache.remove(key);
+        self.failures.remove(key);
+        info!(
+            host = %key.host, port = %key.port, domain = ?key.requested_host,
+            "Cache entry evicted — all protocols failed"
+        );
+    }
+
     /// Clear all entries. Called on route updates to discard stale detections.
     pub fn clear(&self) {
         self.cache.clear();
@@ -357,7 +465,7 @@ impl ProtocolCache {
     /// Snapshot all non-expired cache entries for metrics/UI display.
     pub fn snapshot(&self) -> Vec<ProtocolCacheEntry> {
         self.cache.iter()
-            .filter(|entry| entry.value().detected_at.elapsed() < PROTOCOL_CACHE_TTL)
+            .filter(|entry| entry.value().last_accessed_at.elapsed() < PROTOCOL_CACHE_TTL)
             .map(|entry| {
                 let key = entry.key();
                 let val = entry.value();
@@ -381,6 +489,8 @@ impl ProtocolCache {
                     },
                     h3_port: val.h3_port,
                     age_secs: val.detected_at.elapsed().as_secs(),
+                    last_accessed_secs: val.last_accessed_at.elapsed().as_secs(),
+                    last_probed_secs: val.last_probed_at.elapsed().as_secs(),
                     h2_suppressed: h2_sup,
                     h3_suppressed: h3_sup,
                     h2_cooldown_remaining_secs: h2_cd,
@@ -395,19 +505,37 @@ impl ProtocolCache {
     // --- Internal helpers ---
 
     /// Insert a protocol detection result with an optional H3 port.
+    /// Logs protocol transitions when overwriting an existing entry.
     /// No suppression check — callers must check before calling.
-    fn insert_internal(&self, key: ProtocolCacheKey, protocol: DetectedProtocol, h3_port: Option<u16>) {
+    fn insert_internal(&self, key: ProtocolCacheKey, protocol: DetectedProtocol, h3_port: Option<u16>, reason: &str) {
+        // Check for existing entry to log protocol transitions
+        if let Some(existing) = self.cache.get(&key) {
+            if existing.protocol != protocol {
+                info!(
+                    host = %key.host, port = %key.port, domain = ?key.requested_host,
+                    old = %existing.protocol, new = %protocol, reason = %reason,
+                    "Protocol transition"
+                );
+            }
+            drop(existing);
+        }
+
+        // Evict oldest entry if at capacity
         if self.cache.len() >= PROTOCOL_CACHE_MAX_ENTRIES && !self.cache.contains_key(&key) {
             let oldest = self.cache.iter()
-                .min_by_key(|entry| entry.value().detected_at)
+                .min_by_key(|entry| entry.value().last_accessed_at)
                 .map(|entry| entry.key().clone());
             if let Some(oldest_key) = oldest {
                 self.cache.remove(&oldest_key);
             }
         }
+
+        let now = Instant::now();
         self.cache.insert(key, CachedEntry {
             protocol,
-            detected_at: Instant::now(),
+            detected_at: now,
+            last_accessed_at: now,
+            last_probed_at: now,
             h3_port,
         });
     }
@@ -453,9 +581,9 @@ impl ProtocolCache {
         loop {
             interval.tick().await;
 
-            // Clean expired cache entries
+            // Clean expired cache entries (sliding TTL based on last_accessed_at)
             let expired: Vec<ProtocolCacheKey> = cache.iter()
-                .filter(|entry| entry.value().detected_at.elapsed() >= PROTOCOL_CACHE_TTL)
+                .filter(|entry| entry.value().last_accessed_at.elapsed() >= PROTOCOL_CACHE_TTL)
                 .map(|entry| entry.key().clone())
                 .collect();
 

rust/crates/rustproxy-http/src/proxy_service.rs

@@ -47,6 +47,8 @@ pub struct ConnActivity {
     /// checks the backend's original response headers for Alt-Svc before our
     /// ResponseFilter injects its own. None when not in auto-detect mode or after H3 failure.
     alt_svc_cache_key: Option<crate::protocol_cache::ProtocolCacheKey>,
+    /// The upstream request path that triggered Alt-Svc discovery. Logged for traceability.
+    alt_svc_request_url: Option<String>,
 }
 
 impl ConnActivity {
@@ -58,6 +60,7 @@ impl ConnActivity {
             start: std::time::Instant::now(),
             active_requests: None,
             alt_svc_cache_key: None,
+            alt_svc_request_url: None,
         }
     }
 }
@@ -69,15 +72,16 @@ const DEFAULT_CONNECT_TIMEOUT: std::time::Duration = std::time::Duration::from_s
 /// If no new request arrives within this duration, the connection is closed.
 const DEFAULT_HTTP_IDLE_TIMEOUT: std::time::Duration = std::time::Duration::from_secs(60);
 
+/// Default HTTP max connection lifetime (1 hour).
+/// HTTP connections are forcefully closed after this duration regardless of activity.
+const DEFAULT_HTTP_MAX_LIFETIME: std::time::Duration = std::time::Duration::from_secs(3600);
+
 /// Default WebSocket inactivity timeout (1 hour).
 const DEFAULT_WS_INACTIVITY_TIMEOUT: std::time::Duration = std::time::Duration::from_secs(3600);
 
 /// Default WebSocket max lifetime (24 hours).
 const DEFAULT_WS_MAX_LIFETIME: std::time::Duration = std::time::Duration::from_secs(86400);
 
-/// Timeout for QUIC (H3) backend connections. Short because UDP is often firewalled.
-const QUIC_CONNECT_TIMEOUT: std::time::Duration = std::time::Duration::from_secs(3);
-
 /// Protocol decision for backend connection.
 #[derive(Debug)]
 enum ProtocolDecision {
@@ -219,6 +223,8 @@ pub struct HttpProxyService {
     protocol_cache: Arc<crate::protocol_cache::ProtocolCache>,
     /// HTTP keep-alive idle timeout: close connection if no new request arrives within this duration.
     http_idle_timeout: std::time::Duration,
+    /// HTTP max connection lifetime: forcefully close connection after this duration regardless of activity.
+    http_max_lifetime: std::time::Duration,
     /// WebSocket inactivity timeout (no data in either direction).
     ws_inactivity_timeout: std::time::Duration,
     /// WebSocket maximum connection lifetime.
@@ -245,6 +251,7 @@ impl HttpProxyService {
             connection_pool: Arc::new(crate::connection_pool::ConnectionPool::new()),
             protocol_cache: Arc::new(crate::protocol_cache::ProtocolCache::new()),
             http_idle_timeout: DEFAULT_HTTP_IDLE_TIMEOUT,
+            http_max_lifetime: DEFAULT_HTTP_MAX_LIFETIME,
             ws_inactivity_timeout: DEFAULT_WS_INACTIVITY_TIMEOUT,
             ws_max_lifetime: DEFAULT_WS_MAX_LIFETIME,
             quinn_client_endpoint: Arc::new(Self::create_quinn_client_endpoint()),
@@ -272,21 +279,24 @@ impl HttpProxyService {
             connection_pool: Arc::new(crate::connection_pool::ConnectionPool::new()),
             protocol_cache: Arc::new(crate::protocol_cache::ProtocolCache::new()),
             http_idle_timeout: DEFAULT_HTTP_IDLE_TIMEOUT,
+            http_max_lifetime: DEFAULT_HTTP_MAX_LIFETIME,
             ws_inactivity_timeout: DEFAULT_WS_INACTIVITY_TIMEOUT,
             ws_max_lifetime: DEFAULT_WS_MAX_LIFETIME,
             quinn_client_endpoint: Arc::new(Self::create_quinn_client_endpoint()),
         }
     }
 
-    /// Set the HTTP keep-alive idle timeout, WebSocket inactivity timeout, and
+    /// Set the HTTP keep-alive idle timeout, HTTP max lifetime, WebSocket inactivity
-    /// WebSocket max lifetime from connection config values.
+    /// timeout, and WebSocket max lifetime from connection config values.
     pub fn set_connection_timeouts(
         &mut self,
         http_idle_timeout: std::time::Duration,
+        http_max_lifetime: std::time::Duration,
         ws_inactivity_timeout: std::time::Duration,
         ws_max_lifetime: std::time::Duration,
     ) {
         self.http_idle_timeout = http_idle_timeout;
+        self.http_max_lifetime = http_max_lifetime;
         self.ws_inactivity_timeout = ws_inactivity_timeout;
         self.ws_max_lifetime = ws_max_lifetime;
     }
@@ -311,6 +321,15 @@ impl HttpProxyService {
         self.protocol_cache.clear();
     }
 
+    /// Clean up expired entries in all per-route rate limiters.
+    /// Called from the background sampling task to prevent unbounded growth
+    /// when traffic stops after a burst of unique IPs.
+    pub fn cleanup_all_rate_limiters(&self) {
+        for entry in self.route_rate_limiters.iter() {
+            entry.value().cleanup();
+        }
+    }
+
     /// Snapshot the protocol cache for metrics/UI display.
     pub fn protocol_cache_snapshot(&self) -> Vec<crate::protocol_cache::ProtocolCacheEntry> {
         self.protocol_cache.snapshot()
@@ -351,6 +370,7 @@ impl HttpProxyService {
 
         // Capture timeouts before `self` is moved into the service closure.
         let idle_timeout = self.http_idle_timeout;
+        let max_lifetime = self.http_max_lifetime;
 
         // Activity tracker: updated at the START and END of each request.
         // The idle watchdog checks this to determine if the connection is idle
@@ -371,7 +391,7 @@ impl HttpProxyService {
             let cn = cancel_inner.clone();
             let la = Arc::clone(&la_inner);
             let st = start;
-            let ca = ConnActivity { last_activity: Arc::clone(&la_inner), start, active_requests: Some(Arc::clone(&ar_inner)), alt_svc_cache_key: None };
+            let ca = ConnActivity { last_activity: Arc::clone(&la_inner), start, active_requests: Some(Arc::clone(&ar_inner)), alt_svc_cache_key: None, alt_svc_request_url: None };
             async move {
                 let req = req.map(|body| BoxBody::new(body));
                 let result = svc.handle_request(req, peer, port, cn, ca).await;
@@ -409,15 +429,23 @@ impl HttpProxyService {
                 }
             }
             _ = async {
-                // Idle watchdog: check every 5s whether the connection has been idle
+                // Idle + lifetime watchdog: check every 5s whether the connection has been
-                // (no active requests AND no activity for idle_timeout).
+                // idle (no active requests AND no activity for idle_timeout) or exceeded
-                // This avoids killing long-running requests or upgraded connections.
+                // the max connection lifetime.
                 let check_interval = std::time::Duration::from_secs(5);
                 let mut last_seen = 0u64;
                 loop {
                     tokio::time::sleep(check_interval).await;
 
-                    // Never close while a request is in progress
+                    // Check max connection lifetime (unconditional — even active connections
+                    // must eventually be recycled to prevent resource accumulation).
+                    if start.elapsed() >= max_lifetime {
+                        debug!("HTTP connection exceeded max lifetime ({}s) from {}",
+                            max_lifetime.as_secs(), peer_addr);
+                        return;
+                    }
+
+                    // Never close for idleness while a request is in progress
                     if active_requests.load(Ordering::Relaxed) > 0 {
                         last_seen = last_activity.load(Ordering::Relaxed);
                         continue;
@@ -434,7 +462,7 @@ impl HttpProxyService {
                     last_seen = current;
                 }
             } => {
-                debug!("HTTP connection idle timeout ({}s) from {}", idle_timeout.as_secs(), peer_addr);
+                debug!("HTTP connection timeout from {}", peer_addr);
                 conn.as_mut().graceful_shutdown();
                 // Give any in-flight work 5s to drain after graceful shutdown
                 let _ = tokio::time::timeout(std::time::Duration::from_secs(5), conn).await;
@@ -711,6 +739,9 @@ impl HttpProxyService {
         let cached_h3_port = self.protocol_cache.get(&protocol_cache_key)
             .and_then(|c| c.h3_port);
 
+        // Track whether this ALPN probe is a periodic re-probe (vs first-time detection)
+        let mut is_reprobe = false;
+
         let protocol_decision = match backend_protocol_mode {
             rustproxy_config::BackendProtocol::Http1 => ProtocolDecision::H1,
             rustproxy_config::BackendProtocol::Http2 => ProtocolDecision::H2,
@@ -721,6 +752,12 @@ impl HttpProxyService {
                     ProtocolDecision::H1
                 } else {
                     match self.protocol_cache.get(&protocol_cache_key) {
+                        Some(cached) if cached.needs_reprobe => {
+                            // Entry exists but 5+ minutes since last probe — force ALPN re-probe
+                            // (only fires for H1/H2; H3 entries have needs_reprobe=false)
+                            is_reprobe = true;
+                            ProtocolDecision::AlpnProbe
+                        }
                         Some(cached) => match cached.protocol {
                             crate::protocol_cache::DetectedProtocol::H3 => {
                                 if self.protocol_cache.is_suppressed(&protocol_cache_key, crate::protocol_cache::DetectedProtocol::H3) {
@@ -766,6 +803,7 @@ impl HttpProxyService {
         // the backend's original Alt-Svc header before ResponseFilter injects our own.
         if is_auto_detect_mode {
             conn_activity.alt_svc_cache_key = Some(protocol_cache_key.clone());
+            conn_activity.alt_svc_request_url = Some(upstream_path.to_string());
         }
 
         // --- H3 path: try QUIC connection before TCP ---
@@ -778,10 +816,10 @@ impl HttpProxyService {
             };
 
             // Try H3 pool checkout first
-            if let Some((quic_conn, _age)) = self.connection_pool.checkout_h3(&h3_pool_key) {
+            if let Some((pooled_sr, quic_conn, _age)) = self.connection_pool.checkout_h3(&h3_pool_key) {
                 self.metrics.backend_pool_hit(&upstream_key);
                 let result = self.forward_h3(
-                    quic_conn, parts, body, upstream_headers, &upstream_path,
+                    quic_conn, Some(pooled_sr), parts, body, upstream_headers, &upstream_path,
                     route_match.route, route_id, &ip_str, &h3_pool_key, domain_str, &conn_activity, &upstream_key,
                 ).await;
                 self.upstream_selector.connection_ended(&upstream_key);
@@ -794,7 +832,7 @@ impl HttpProxyService {
                     self.metrics.backend_pool_miss(&upstream_key);
                     self.metrics.backend_connection_opened(&upstream_key, std::time::Instant::now().elapsed());
                     let result = self.forward_h3(
-                        quic_conn, parts, body, upstream_headers, &upstream_path,
+                        quic_conn, None, parts, body, upstream_headers, &upstream_path,
                         route_match.route, route_id, &ip_str, &h3_pool_key, domain_str, &conn_activity, &upstream_key,
                     ).await;
                     self.upstream_selector.connection_ended(&upstream_key);
@@ -893,7 +931,7 @@ impl HttpProxyService {
                         let alpn = tls.get_ref().1.alpn_protocol();
                         let is_h2 = alpn.map(|p| p == b"h2").unwrap_or(false);
 
-                        // Cache the result
+                        // Cache the result (or update existing entry for re-probes)
                         let cache_key = crate::protocol_cache::ProtocolCacheKey {
                             host: upstream.host.clone(),
                             port: upstream.port,
@@ -904,13 +942,18 @@ impl HttpProxyService {
                         } else {
                             crate::protocol_cache::DetectedProtocol::H1
                         };
-                        self.protocol_cache.insert(cache_key, detected);
+                        if is_reprobe {
+                            self.protocol_cache.update_probe_result(&cache_key, detected, "periodic ALPN re-probe");
+                        } else {
+                            self.protocol_cache.insert(cache_key, detected, "initial ALPN detection");
+                        }
 
                         info!(
                             backend = %upstream_key,
                             domain = %domain_str,
                             protocol = if is_h2 { "h2" } else { "h1" },
                             connect_time_ms = %connect_start.elapsed().as_millis(),
+                            reprobe = is_reprobe,
                             "Backend protocol detected via ALPN"
                         );
 
@@ -938,17 +981,17 @@ impl HttpProxyService {
                         if let Some(h3_port) = cached_h3_port {
                             if self.protocol_cache.can_retry(&protocol_cache_key, crate::protocol_cache::DetectedProtocol::H3) {
                                 self.protocol_cache.record_retry_attempt(&protocol_cache_key, crate::protocol_cache::DetectedProtocol::H3);
-                                debug!(backend = %upstream_key, domain = %domain_str, "TCP connect failed — escalating to H3");
+                                debug!(backend = %upstream_key, domain = %domain_str, "TLS connect failed — escalating to H3");
                                 match self.connect_quic_backend(&upstream.host, h3_port).await {
                                     Ok(quic_conn) => {
                                         self.protocol_cache.clear_failure(&protocol_cache_key, crate::protocol_cache::DetectedProtocol::H3);
-                                        self.protocol_cache.insert_h3(protocol_cache_key.clone(), h3_port);
+                                        self.protocol_cache.insert_h3(protocol_cache_key.clone(), h3_port, "recovery — TLS failed, H3 succeeded");
                                         let h3_pool_key = crate::connection_pool::PoolKey {
                                             host: upstream.host.clone(), port: h3_port, use_tls: true,
                                             protocol: crate::connection_pool::PoolProtocol::H3,
                                         };
                                         let result = self.forward_h3(
-                                            quic_conn, parts, body, upstream_headers, &upstream_path,
+                                            quic_conn, None, parts, body, upstream_headers, &upstream_path,
                                             route_match.route, route_id, &ip_str, &h3_pool_key, domain_str, &conn_activity, &upstream_key,
                                         ).await;
                                         self.upstream_selector.connection_ended(&upstream_key);
@@ -961,6 +1004,8 @@ impl HttpProxyService {
                                 }
                             }
                         }
+                        // All protocols failed — evict cache entry
+                        self.protocol_cache.evict(&protocol_cache_key);
                     }
                     return Ok(error_response(StatusCode::BAD_GATEWAY, "Backend TLS unavailable"));
                 }
@@ -979,17 +1024,17 @@ impl HttpProxyService {
                         if let Some(h3_port) = cached_h3_port {
                             if self.protocol_cache.can_retry(&protocol_cache_key, crate::protocol_cache::DetectedProtocol::H3) {
                                 self.protocol_cache.record_retry_attempt(&protocol_cache_key, crate::protocol_cache::DetectedProtocol::H3);
-                                debug!(backend = %upstream_key, domain = %domain_str, "TCP connect timeout — escalating to H3");
+                                debug!(backend = %upstream_key, domain = %domain_str, "TLS connect timeout — escalating to H3");
                                 match self.connect_quic_backend(&upstream.host, h3_port).await {
                                     Ok(quic_conn) => {
                                         self.protocol_cache.clear_failure(&protocol_cache_key, crate::protocol_cache::DetectedProtocol::H3);
-                                        self.protocol_cache.insert_h3(protocol_cache_key.clone(), h3_port);
+                                        self.protocol_cache.insert_h3(protocol_cache_key.clone(), h3_port, "recovery — TLS timeout, H3 succeeded");
                                         let h3_pool_key = crate::connection_pool::PoolKey {
                                             host: upstream.host.clone(), port: h3_port, use_tls: true,
                                             protocol: crate::connection_pool::PoolProtocol::H3,
                                         };
                                         let result = self.forward_h3(
-                                            quic_conn, parts, body, upstream_headers, &upstream_path,
+                                            quic_conn, None, parts, body, upstream_headers, &upstream_path,
                                             route_match.route, route_id, &ip_str, &h3_pool_key, domain_str, &conn_activity, &upstream_key,
                                         ).await;
                                         self.upstream_selector.connection_ended(&upstream_key);
@@ -1002,6 +1047,8 @@ impl HttpProxyService {
                                 }
                             }
                         }
+                        // All protocols failed — evict cache entry
+                        self.protocol_cache.evict(&protocol_cache_key);
                     }
                     return Ok(error_response(StatusCode::GATEWAY_TIMEOUT, "Backend TLS connect timeout"));
                 }
@@ -1040,13 +1087,13 @@ impl HttpProxyService {
                                 match self.connect_quic_backend(&upstream.host, h3_port).await {
                                     Ok(quic_conn) => {
                                         self.protocol_cache.clear_failure(&protocol_cache_key, crate::protocol_cache::DetectedProtocol::H3);
-                                        self.protocol_cache.insert_h3(protocol_cache_key.clone(), h3_port);
+                                        self.protocol_cache.insert_h3(protocol_cache_key.clone(), h3_port, "recovery — TCP failed, H3 succeeded");
                                         let h3_pool_key = crate::connection_pool::PoolKey {
                                             host: upstream.host.clone(), port: h3_port, use_tls: true,
                                             protocol: crate::connection_pool::PoolProtocol::H3,
                                         };
                                         let result = self.forward_h3(
-                                            quic_conn, parts, body, upstream_headers, &upstream_path,
+                                            quic_conn, None, parts, body, upstream_headers, &upstream_path,
                                             route_match.route, route_id, &ip_str, &h3_pool_key, domain_str, &conn_activity, &upstream_key,
                                         ).await;
                                         self.upstream_selector.connection_ended(&upstream_key);
@@ -1059,6 +1106,8 @@ impl HttpProxyService {
                                 }
                             }
                         }
+                        // All protocols failed — evict cache entry
+                        self.protocol_cache.evict(&protocol_cache_key);
                     }
                     return Ok(error_response(StatusCode::BAD_GATEWAY, "Backend unavailable"));
                 }
@@ -1081,13 +1130,13 @@ impl HttpProxyService {
                                 match self.connect_quic_backend(&upstream.host, h3_port).await {
                                     Ok(quic_conn) => {
                                         self.protocol_cache.clear_failure(&protocol_cache_key, crate::protocol_cache::DetectedProtocol::H3);
-                                        self.protocol_cache.insert_h3(protocol_cache_key.clone(), h3_port);
+                                        self.protocol_cache.insert_h3(protocol_cache_key.clone(), h3_port, "recovery — TCP timeout, H3 succeeded");
                                         let h3_pool_key = crate::connection_pool::PoolKey {
                                             host: upstream.host.clone(), port: h3_port, use_tls: true,
                                             protocol: crate::connection_pool::PoolProtocol::H3,
                                         };
                                         let result = self.forward_h3(
-                                            quic_conn, parts, body, upstream_headers, &upstream_path,
+                                            quic_conn, None, parts, body, upstream_headers, &upstream_path,
                                             route_match.route, route_id, &ip_str, &h3_pool_key, domain_str, &conn_activity, &upstream_key,
                                         ).await;
                                         self.upstream_selector.connection_ended(&upstream_key);
@@ -1100,6 +1149,8 @@ impl HttpProxyService {
                                 }
                             }
                         }
+                        // All protocols failed — evict cache entry
+                        self.protocol_cache.evict(&protocol_cache_key);
                     }
                     return Ok(error_response(StatusCode::GATEWAY_TIMEOUT, "Backend connect timeout"));
                 }
@@ -1183,8 +1234,10 @@ impl HttpProxyService {
         };
 
         tokio::spawn(async move {
-            if let Err(e) = conn.await {
+            match tokio::time::timeout(std::time::Duration::from_secs(300), conn).await {
-                debug!("Upstream connection error: {}", e);
+                Ok(Err(e)) => debug!("Upstream connection error: {}", e),
+                Err(_) => debug!("H1 connection driver timed out after 300s"),
+                _ => {}
             }
         });
 
@@ -1574,7 +1627,7 @@ impl HttpProxyService {
                     cache_key.clone(),
                     crate::protocol_cache::DetectedProtocol::H2,
                 );
-                self.protocol_cache.insert(cache_key, crate::protocol_cache::DetectedProtocol::H1);
+                self.protocol_cache.insert(cache_key.clone(), crate::protocol_cache::DetectedProtocol::H1, "H2 handshake timeout — downgrade");
 
                 match self.reconnect_backend(upstream, domain, backend_key).await {
                     Some(fallback_backend) => {
@@ -1593,6 +1646,8 @@ impl HttpProxyService {
                         result
                     }
                     None => {
+                        // H2 failed and H1 reconnect also failed — evict cache
+                        self.protocol_cache.evict(&cache_key);
                         Ok(error_response(StatusCode::BAD_GATEWAY, "Backend unavailable after H2 timeout fallback"))
                     }
                 }
@@ -1717,7 +1772,7 @@ impl HttpProxyService {
                     cache_key.clone(),
                     crate::protocol_cache::DetectedProtocol::H2,
                 );
-                self.protocol_cache.insert(cache_key, crate::protocol_cache::DetectedProtocol::H1);
+                self.protocol_cache.insert(cache_key.clone(), crate::protocol_cache::DetectedProtocol::H1, "H2 handshake error — downgrade");
 
                 // Reconnect for H1 (the original io was consumed by the failed h2 handshake)
                 match self.reconnect_backend(upstream, domain, backend_key).await {
@@ -1738,6 +1793,8 @@ impl HttpProxyService {
                         result
                     }
                     None => {
+                        // H2 failed and H1 reconnect also failed — evict cache
+                        self.protocol_cache.evict(&cache_key);
                         Ok(error_response(StatusCode::BAD_GATEWAY, "Backend unavailable after H2 fallback"))
                     }
                 }
@@ -1773,8 +1830,10 @@ impl HttpProxyService {
         };
 
         tokio::spawn(async move {
-            if let Err(e) = conn.await {
+            match tokio::time::timeout(std::time::Duration::from_secs(300), conn).await {
-                debug!("H1 fallback: upstream connection error: {}", e);
+                Ok(Err(e)) => debug!("H1 fallback: upstream connection error: {}", e),
+                Err(_) => debug!("H1 fallback: connection driver timed out after 300s"),
+                _ => {}
             }
         });
 
@@ -1953,8 +2012,10 @@ impl HttpProxyService {
         if let Some(ref cache_key) = conn_activity.alt_svc_cache_key {
             if let Some(alt_svc) = resp_parts.headers.get("alt-svc").and_then(|v| v.to_str().ok()) {
                 if let Some(h3_port) = parse_alt_svc_h3_port(alt_svc) {
-                    debug!(h3_port, "Backend advertises H3 via Alt-Svc");
+                    let url = conn_activity.alt_svc_request_url.as_deref().unwrap_or("-");
-                    self.protocol_cache.insert_h3(cache_key.clone(), h3_port);
+                    debug!(h3_port, url, "Backend advertises H3 via Alt-Svc");
+                    let reason = format!("Alt-Svc response header ({})", url);
+                    self.protocol_cache.insert_h3(cache_key.clone(), h3_port, &reason);
                 }
             }
         }
@@ -2708,7 +2769,12 @@ impl HttpProxyService {
 
         let quic_crypto = quinn::crypto::rustls::QuicClientConfig::try_from(tls_config)
             .expect("Failed to create QUIC client crypto config");
-        let client_config = quinn::ClientConfig::new(Arc::new(quic_crypto));
+
+        // Tune QUIC transport to match H2 flow-control: 2 MB per-stream receive window.
+        let mut transport = quinn::TransportConfig::default();
+        transport.stream_receive_window(quinn::VarInt::from_u32(2 * 1024 * 1024));
+        let mut client_config = quinn::ClientConfig::new(Arc::new(quic_crypto));
+        client_config.transport_config(Arc::new(transport));
 
         let mut endpoint = quinn::Endpoint::client("0.0.0.0:0".parse().unwrap())
             .expect("Failed to create QUIC client endpoint");
@@ -2730,8 +2796,8 @@ impl HttpProxyService {
         let server_name = host.to_string();
         let connecting = self.quinn_client_endpoint.connect(addr, &server_name)?;
 
-        let connection = tokio::time::timeout(QUIC_CONNECT_TIMEOUT, connecting).await
+        let connection = tokio::time::timeout(self.connect_timeout, connecting).await
-            .map_err(|_| format!("QUIC connect timeout (3s) for {}", host))??;
+            .map_err(|_| format!("QUIC connect timeout ({:?}) for {}", self.connect_timeout, host))??;
 
         debug!("QUIC backend connection established to {}:{}", host, port);
         Ok(connection)
@@ -2741,6 +2807,7 @@ impl HttpProxyService {
     async fn forward_h3(
         &self,
         quic_conn: quinn::Connection,
+        pooled_sender: Option<h3::client::SendRequest<h3_quinn::OpenStreams, Bytes>>,
         parts: hyper::http::request::Parts,
         body: BoxBody<Bytes, hyper::Error>,
         upstream_headers: hyper::HeaderMap,
@@ -2753,8 +2820,14 @@ impl HttpProxyService {
         conn_activity: &ConnActivity,
         backend_key: &str,
     ) -> Result<Response<BoxBody<Bytes, hyper::Error>>, hyper::Error> {
+        // Obtain the h3 SendRequest handle: skip handshake + driver on pool hit.
+        let (mut send_request, gen_holder) = if let Some(sr) = pooled_sender {
+            // Pool hit — reuse existing h3 session, no SETTINGS round-trip
+            (sr, None)
+        } else {
+            // Fresh QUIC connection — full h3 handshake + driver spawn
             let h3_quinn_conn = h3_quinn::Connection::new(quic_conn.clone());
-        let (mut driver, mut send_request) = match h3::client::builder()
+            let (mut driver, sr) = match h3::client::builder()
                 .send_grease(false)
                 .build(h3_quinn_conn)
                 .await
@@ -2767,10 +2840,10 @@ impl HttpProxyService {
                 }
             };
 
-        // Spawn the h3 connection driver
+            let gen_holder = Arc::new(std::sync::atomic::AtomicU64::new(u64::MAX));
+            {
                 let driver_pool = Arc::clone(&self.connection_pool);
                 let driver_pool_key = pool_key.clone();
-        let gen_holder = Arc::new(std::sync::atomic::AtomicU64::new(u64::MAX));
                 let driver_gen = Arc::clone(&gen_holder);
                 tokio::spawn(async move {
                     let close_err = std::future::poll_fn(|cx| driver.poll_close(cx)).await;
@@ -2780,6 +2853,9 @@ impl HttpProxyService {
                         driver_pool.remove_h3_if_generation(&driver_pool_key, g);
                     }
                 });
+            }
+            (sr, Some(gen_holder))
+        };
 
         // Build the H3 request
         let uri = hyper::Uri::builder()
@@ -2809,7 +2885,7 @@ impl HttpProxyService {
             }
         };
 
-        // Stream request body
+        // Stream request body (zero-copy: into_data yields owned Bytes)
         let rid: Option<Arc<str>> = route_id.map(Arc::from);
         let sip: Arc<str> = Arc::from(source_ip);
 
@@ -2819,9 +2895,9 @@ impl HttpProxyService {
             while let Some(frame) = body.frame().await {
                 match frame {
                     Ok(frame) => {
-                        if let Some(data) = frame.data_ref() {
+                        if let Ok(data) = frame.into_data() {
                             self.metrics.record_bytes(data.len() as u64, 0, rid.as_deref(), Some(&sip));
-                            if let Err(e) = stream.send_data(Bytes::copy_from_slice(data)).await {
+                            if let Err(e) = stream.send_data(data).await {
                                 error!(backend = %backend_key, error = %e, "H3 send_data failed");
                                 return Ok(error_response(StatusCode::BAD_GATEWAY, "H3 body send failed"));
                             }
@@ -2863,8 +2939,23 @@ impl HttpProxyService {
             ResponseFilter::apply_headers(route, headers, None);
         }
 
-        // Stream response body back via an adapter
+        // Stream response body back via unfold — correctly preserves waker across polls
-        let h3_body = H3ClientResponseBody { stream };
+        let body_stream = futures::stream::unfold(stream, |mut s| async move {
+            match s.recv_data().await {
+                Ok(Some(mut buf)) => {
+                    use bytes::Buf;
+                    let data = buf.copy_to_bytes(buf.remaining());
+                    Some((Ok::<_, hyper::Error>(http_body::Frame::data(data)), s))
+                }
+                Ok(None) => None,
+                Err(e) => {
+                    warn!("H3 response body recv error: {}", e);
+                    None
+                }
+            }
+        });
+        let h3_body = http_body_util::StreamBody::new(body_stream);
+
         let counting_body = CountingBody::new(
             h3_body,
             Arc::clone(&self.metrics),
@@ -2881,10 +2972,16 @@ impl HttpProxyService {
 
         let body: BoxBody<Bytes, hyper::Error> = BoxBody::new(counting_body);
 
-        // Register connection in pool on success
+        // Register connection in pool on success (fresh connections only)
         if status != StatusCode::BAD_GATEWAY {
-            let g = self.connection_pool.register_h3(pool_key.clone(), quic_conn);
+            if let Some(gh) = gen_holder {
-            gen_holder.store(g, std::sync::atomic::Ordering::Relaxed);
+                let g = self.connection_pool.register_h3(
+                    pool_key.clone(),
+                    quic_conn,
+                    send_request,
+                );
+                gh.store(g, std::sync::atomic::Ordering::Relaxed);
+            }
         }
 
         self.metrics.set_backend_protocol(backend_key, "h3");
@@ -2913,41 +3010,6 @@ fn parse_alt_svc_h3_port(header_value: &str) -> Option<u16> {
     None
 }
 
-/// Response body adapter for H3 client responses.
-/// Reads data from the h3 `RequestStream` recv side and presents it as an `http_body::Body`.
-struct H3ClientResponseBody {
-    stream: h3::client::RequestStream<h3_quinn::BidiStream<Bytes>, Bytes>,
-}
-
-impl http_body::Body for H3ClientResponseBody {
-    type Data = Bytes;
-    type Error = hyper::Error;
-
-    fn poll_frame(
-        mut self: Pin<&mut Self>,
-        _cx: &mut Context<'_>,
-    ) -> Poll<Option<Result<http_body::Frame<Self::Data>, Self::Error>>> {
-        // h3's recv_data is async, so we need to poll it manually.
-        // Use a small future to poll the recv_data call.
-        use std::future::Future;
-        let mut fut = Box::pin(self.stream.recv_data());
-        match fut.as_mut().poll(_cx) {
-            Poll::Ready(Ok(Some(mut buf))) => {
-                use bytes::Buf;
-                let data = Bytes::copy_from_slice(buf.chunk());
-                buf.advance(buf.remaining());
-                Poll::Ready(Some(Ok(http_body::Frame::data(data))))
-            }
-            Poll::Ready(Ok(None)) => Poll::Ready(None),
-            Poll::Ready(Err(e)) => {
-                warn!("H3 response body recv error: {}", e);
-                Poll::Ready(None)
-            }
-            Poll::Pending => Poll::Pending,
-        }
-    }
-}
-
 /// Insecure certificate verifier for backend TLS connections (fallback only).
 /// The production path uses the shared config from tls_handler which has the same
 /// behavior but with session resumption across all outbound connections.
@@ -3016,6 +3078,7 @@ impl Default for HttpProxyService {
             connection_pool: Arc::new(crate::connection_pool::ConnectionPool::new()),
             protocol_cache: Arc::new(crate::protocol_cache::ProtocolCache::new()),
             http_idle_timeout: DEFAULT_HTTP_IDLE_TIMEOUT,
+            http_max_lifetime: DEFAULT_HTTP_MAX_LIFETIME,
             ws_inactivity_timeout: DEFAULT_WS_INACTIVITY_TIMEOUT,
             ws_max_lifetime: DEFAULT_WS_MAX_LIFETIME,
             quinn_client_endpoint: Arc::new(Self::create_quinn_client_endpoint()),

rust/crates/rustproxy-metrics/src/collector.rs

@@ -89,6 +89,8 @@ pub struct ProtocolCacheEntryMetric {
     pub protocol: String,
     pub h3_port: Option<u16>,
     pub age_secs: u64,
+    pub last_accessed_secs: u64,
+    pub last_probed_secs: u64,
     pub h2_suppressed: bool,
     pub h3_suppressed: bool,
     pub h2_cooldown_remaining_secs: Option<u64>,
@@ -622,6 +624,24 @@ impl MetricsCollector {
         self.ip_pending_tp.retain(|k, _| self.ip_connections.contains_key(k));
         self.ip_throughput.retain(|k, _| self.ip_connections.contains_key(k));
         self.ip_total_connections.retain(|k, _| self.ip_connections.contains_key(k));
+
+        // Safety-net: prune orphaned backend error/stats entries for backends
+        // that have no active or total connections (error-only backends).
+        // These accumulate when backend_connect_error/backend_handshake_error
+        // create entries but backend_connection_opened is never called.
+        let known_backends: HashSet<String> = self.backend_active.iter()
+            .map(|e| e.key().clone())
+            .chain(self.backend_total.iter().map(|e| e.key().clone()))
+            .collect();
+        self.backend_connect_errors.retain(|k, _| known_backends.contains(k));
+        self.backend_handshake_errors.retain(|k, _| known_backends.contains(k));
+        self.backend_request_errors.retain(|k, _| known_backends.contains(k));
+        self.backend_connect_time_us.retain(|k, _| known_backends.contains(k));
+        self.backend_connect_count.retain(|k, _| known_backends.contains(k));
+        self.backend_pool_hits.retain(|k, _| known_backends.contains(k));
+        self.backend_pool_misses.retain(|k, _| known_backends.contains(k));
+        self.backend_h2_failures.retain(|k, _| known_backends.contains(k));
+        self.backend_protocol.retain(|k, _| known_backends.contains(k));
     }
 
     /// Remove per-route metrics for route IDs that are no longer active.

rust/crates/rustproxy-passthrough/src/lib.rs

@@ -10,7 +10,6 @@ pub mod forwarder;
 pub mod proxy_protocol;
 pub mod tls_handler;
 pub mod connection_tracker;
-pub mod socket_relay;
 pub mod socket_opts;
 pub mod udp_session;
 pub mod udp_listener;
@@ -22,7 +21,6 @@ pub use forwarder::*;
 pub use proxy_protocol::*;
 pub use tls_handler::*;
 pub use connection_tracker::*;
-pub use socket_relay::*;
 pub use socket_opts::*;
 pub use udp_session::*;
 pub use udp_listener::*;

rust/crates/rustproxy-passthrough/src/quic_handler.rs

@@ -77,6 +77,13 @@ struct RelaySession {
     cancel: CancellationToken,
 }
 
+impl Drop for RelaySession {
+    fn drop(&mut self) {
+        self.cancel.cancel();
+        self.return_task.abort();
+    }
+}
+
 /// Create a QUIC endpoint with a PROXY protocol v2 relay layer.
 ///
 /// Instead of giving the external socket to quinn, we:
@@ -634,7 +641,7 @@ async fn forward_quic_stream_to_tcp(
     let la_watch = Arc::clone(&last_activity);
     let c2b_abort = c2b.abort_handle();
     let b2c_abort = b2c.abort_handle();
-    tokio::spawn(async move {
+    let watchdog = tokio::spawn(async move {
         let check_interval = std::time::Duration::from_secs(5);
         let mut last_seen = 0u64;
         loop {
@@ -665,6 +672,7 @@ async fn forward_quic_stream_to_tcp(
 
     let bytes_in = c2b.await.unwrap_or(0);
     let bytes_out = b2c.await.unwrap_or(0);
+    watchdog.abort();
 
     Ok((bytes_in, bytes_out))
 }

rust/crates/rustproxy-passthrough/src/socket_relay.rs

@@ -1,126 +1,4 @@
-//! Socket handler relay for connecting client connections to a TypeScript handler
+//! Socket handler relay module.
-//! via a Unix domain socket.
 //!
-//! Protocol: Send a JSON metadata line terminated by `\n`, then bidirectional relay.
+//! Note: The actual relay logic lives in `tcp_listener::relay_to_socket_handler()`
-
+//! which has proper timeouts, cancellation, and metrics integration.
-use tokio::net::UnixStream;
-use tokio::io::{AsyncWriteExt, AsyncReadExt};
-use tokio::net::TcpStream;
-use serde::Serialize;
-use tracing::debug;
-
-#[derive(Serialize)]
-#[serde(rename_all = "camelCase")]
-struct RelayMetadata {
-    connection_id: u64,
-    remote_ip: String,
-    remote_port: u16,
-    local_port: u16,
-    sni: Option<String>,
-    route_name: String,
-    initial_data_base64: Option<String>,
-}
-
-/// Relay a client connection to a TypeScript handler via Unix domain socket.
-///
-/// Protocol: Send a JSON metadata line terminated by `\n`, then bidirectional relay.
-pub async fn relay_to_handler(
-    client: TcpStream,
-    relay_socket_path: &str,
-    connection_id: u64,
-    remote_ip: String,
-    remote_port: u16,
-    local_port: u16,
-    sni: Option<String>,
-    route_name: String,
-    initial_data: Option<&[u8]>,
-) -> std::io::Result<()> {
-    debug!(
-        "Relaying connection {} to handler socket {}",
-        connection_id, relay_socket_path
-    );
-
-    // Connect to TypeScript handler Unix socket
-    let mut handler = UnixStream::connect(relay_socket_path).await?;
-
-    // Build and send metadata header
-    let initial_data_base64 = initial_data.map(base64_encode);
-
-    let metadata = RelayMetadata {
-        connection_id,
-        remote_ip,
-        remote_port,
-        local_port,
-        sni,
-        route_name,
-        initial_data_base64,
-    };
-
-    let metadata_json = serde_json::to_string(&metadata)
-        .map_err(|e| std::io::Error::new(std::io::ErrorKind::Other, e))?;
-
-    handler.write_all(metadata_json.as_bytes()).await?;
-    handler.write_all(b"\n").await?;
-
-    // Bidirectional relay between client and handler
-    let (mut client_read, mut client_write) = client.into_split();
-    let (mut handler_read, mut handler_write) = handler.into_split();
-
-    let c2h = tokio::spawn(async move {
-        let mut buf = vec![0u8; 65536];
-        loop {
-            let n = match client_read.read(&mut buf).await {
-                Ok(0) | Err(_) => break,
-                Ok(n) => n,
-            };
-            if handler_write.write_all(&buf[..n]).await.is_err() {
-                break;
-            }
-        }
-        let _ = handler_write.shutdown().await;
-    });
-
-    let h2c = tokio::spawn(async move {
-        let mut buf = vec![0u8; 65536];
-        loop {
-            let n = match handler_read.read(&mut buf).await {
-                Ok(0) | Err(_) => break,
-                Ok(n) => n,
-            };
-            if client_write.write_all(&buf[..n]).await.is_err() {
-                break;
-            }
-        }
-        let _ = client_write.shutdown().await;
-    });
-
-    let _ = tokio::join!(c2h, h2c);
-
-    debug!("Relay connection {} completed", connection_id);
-    Ok(())
-}
-
-/// Simple base64 encoding without external dependency.
-fn base64_encode(data: &[u8]) -> String {
-    const CHARS: &[u8] = b"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
-    let mut result = String::new();
-    for chunk in data.chunks(3) {
-        let b0 = chunk[0] as u32;
-        let b1 = if chunk.len() > 1 { chunk[1] as u32 } else { 0 };
-        let b2 = if chunk.len() > 2 { chunk[2] as u32 } else { 0 };
-        let n = (b0 << 16) | (b1 << 8) | b2;
-        result.push(CHARS[((n >> 18) & 0x3F) as usize] as char);
-        result.push(CHARS[((n >> 12) & 0x3F) as usize] as char);
-        if chunk.len() > 1 {
-            result.push(CHARS[((n >> 6) & 0x3F) as usize] as char);
-        } else {
-            result.push('=');
-        }
-        if chunk.len() > 2 {
-            result.push(CHARS[(n & 0x3F) as usize] as char);
-        } else {
-            result.push('=');
-        }
-    }
-    result
-}

rust/crates/rustproxy-passthrough/src/tcp_listener.rs

@@ -182,6 +182,7 @@ impl TcpListenerManager {
         http_proxy_svc.set_backend_tls_config_alpn(tls_handler::shared_backend_tls_config_alpn());
         http_proxy_svc.set_connection_timeouts(
             std::time::Duration::from_millis(conn_config.socket_timeout_ms),
+            std::time::Duration::from_millis(conn_config.max_connection_lifetime_ms),
             std::time::Duration::from_millis(conn_config.socket_timeout_ms),
             std::time::Duration::from_millis(conn_config.max_connection_lifetime_ms),
         );
@@ -220,6 +221,7 @@ impl TcpListenerManager {
         http_proxy_svc.set_backend_tls_config_alpn(tls_handler::shared_backend_tls_config_alpn());
         http_proxy_svc.set_connection_timeouts(
             std::time::Duration::from_millis(conn_config.socket_timeout_ms),
+            std::time::Duration::from_millis(conn_config.max_connection_lifetime_ms),
             std::time::Duration::from_millis(conn_config.socket_timeout_ms),
             std::time::Duration::from_millis(conn_config.max_connection_lifetime_ms),
         );
@@ -263,6 +265,7 @@ impl TcpListenerManager {
         http_proxy_svc.set_backend_tls_config_alpn(tls_handler::shared_backend_tls_config_alpn());
         http_proxy_svc.set_connection_timeouts(
             std::time::Duration::from_millis(config.socket_timeout_ms),
+            std::time::Duration::from_millis(config.max_connection_lifetime_ms),
             std::time::Duration::from_millis(config.socket_timeout_ms),
             std::time::Duration::from_millis(config.max_connection_lifetime_ms),
         );

rust/crates/rustproxy/src/lib.rs

@@ -363,6 +363,7 @@ impl RustProxy {
         // Start the throughput sampling task with cooperative cancellation
         let metrics = Arc::clone(&self.metrics);
         let conn_tracker = self.listener_manager.as_ref().unwrap().conn_tracker().clone();
+        let http_proxy = self.listener_manager.as_ref().unwrap().http_proxy().clone();
         let interval_ms = self.options.metrics.as_ref()
             .and_then(|m| m.sample_interval_ms)
             .unwrap_or(1000);
@@ -378,6 +379,9 @@ impl RustProxy {
                         metrics.sample_all();
                         // Periodically clean up stale rate-limit timestamp entries
                         conn_tracker.cleanup_stale_timestamps();
+                        // Clean up expired rate limiter entries to prevent unbounded
+                        // growth from unique IPs after traffic stops
+                        http_proxy.cleanup_all_rate_limiters();
                     }
                 }
             }
@@ -950,6 +954,8 @@ impl RustProxy {
                     protocol: e.protocol,
                     h3_port: e.h3_port,
                     age_secs: e.age_secs,
+                    last_accessed_secs: e.last_accessed_secs,
+                    last_probed_secs: e.last_probed_secs,
                     h2_suppressed: e.h2_suppressed,
                     h3_suppressed: e.h3_suppressed,
                     h2_cooldown_remaining_secs: e.h2_cooldown_remaining_secs,

ts/00_commitinfo_data.ts

@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@push.rocks/smartproxy',
-  version: '26.1.0',
+  version: '26.2.4',
   description: 'A powerful proxy package with unified route-based configuration for high traffic management. Features include SSL/TLS support, flexible routing patterns, WebSocket handling, advanced security options, and automatic ACME certificate management.'
 }

ts/proxies/smart-proxy/datagram-handler-server.ts

@@ -26,6 +26,8 @@ interface IDatagramRelayMessage {
  * - TS→Rust: { type: "reply", sourceIp, sourcePort, destPort, payloadBase64 }
  */
 export class DatagramHandlerServer {
+  private static readonly MAX_BUFFER_SIZE = 50 * 1024 * 1024; // 50 MB
+
   private server: plugins.net.Server | null = null;
   private connection: plugins.net.Socket | null = null;
   private socketPath: string;
@@ -100,6 +102,11 @@ export class DatagramHandlerServer {
 
     socket.on('data', (chunk: Buffer) => {
       this.readBuffer = Buffer.concat([this.readBuffer, chunk]);
+      if (this.readBuffer.length > DatagramHandlerServer.MAX_BUFFER_SIZE) {
+        logger.log('error', `DatagramHandlerServer: buffer exceeded ${DatagramHandlerServer.MAX_BUFFER_SIZE} bytes, resetting`);
+        this.readBuffer = Buffer.alloc(0);
+        return;
+      }
       this.processFrames();
     });
 

ts/proxies/smart-proxy/models/metrics-types.ts

@@ -126,6 +126,8 @@ export interface IProtocolCacheEntry {
   protocol: string;
   h3Port: number | null;
   ageSecs: number;
+  lastAccessedSecs: number;
+  lastProbedSecs: number;
   h2Suppressed: boolean;
   h3Suppressed: boolean;
   h2CooldownRemainingSecs: number | null;

ts/proxies/smart-proxy/smart-proxy.ts

@@ -128,6 +128,7 @@ export class SmartProxy extends plugins.EventEmitter {
     }
 
     // Handle unexpected exit (only emits error if not intentionally stopping)
+    this.bridge.removeAllListeners('exit');
     this.bridge.on('exit', (code: number | null, signal: string | null) => {
       if (this.stopping) return;
       logger.log('error', `RustProxy exited unexpectedly (code=${code}, signal=${signal})`, { component: 'smart-proxy' });

ts/proxies/smart-proxy/utils/route-helpers/dynamic-helpers.ts

@@ -69,14 +69,15 @@ export function createOffsetPortMappingRoute(options: {
   priority?: number;
   [key: string]: any;
 }): IRouteConfig {
+  const { ports, targetHost, offset, name, domains, priority, ...rest } = options;
   return createPortMappingRoute({
-    sourcePortRange: options.ports,
+    sourcePortRange: ports,
-    targetHost: options.targetHost,
+    targetHost,
-    portMapper: (context) => context.port + options.offset,
+    portMapper: (context) => context.port + offset,
-    name: options.name || `Offset Mapping (${options.offset > 0 ? '+' : ''}${options.offset}) for ${options.domains || 'all domains'}`,
+    name: name || `Offset Mapping (${offset > 0 ? '+' : ''}${offset}) for ${domains || 'all domains'}`,
-    domains: options.domains,
+    domains,
-    priority: options.priority,
+    priority,
-    ...options
+    ...rest
   });
 }
 

ts/proxies/smart-proxy/utils/route-validator.ts

@@ -258,8 +258,10 @@ export class RouteValidator {
         errorMap.set(route.name, existingErrors);
         valid = false;
       }
+      if (route.name) {
         routeNames.add(route.name);
       }
+    }
 
     // Validate each route
     for (const route of routes) {
@@ -328,7 +330,7 @@ export class RouteValidator {
       if (catchAllRoutes.length > 1) {
         for (const route of catchAllRoutes) {
           conflicts.push({
-            route: route.name,
+            route: route.name || 'unnamed',
             message: `Multiple catch-all routes on port ${port}`
           });
         }

tsconfig.json

@@ -7,8 +7,7 @@
     "moduleResolution": "NodeNext",
     "esModuleInterop": true,
     "verbatimModuleSyntax": true,
-    "baseUrl": ".",
+    "ignoreDeprecations": "6.0"
-    "paths": {}
   },
   "exclude": [
     "dist_*/**/*.d.ts"