Merge pull request #2869 from fatedier/dev

bump version to v0.41.0

.circleci/config.yml

@@ -1,17 +1,15 @@
 version: 2
 jobs:
-  test1:
+  go-version-latest:
     docker:
-      - image: circleci/golang:1.16-node
-    working_directory: /go/src/github.com/fatedier/frp
+      - image: cimg/go:1.18-node
     steps:
       - checkout
       - run: make
       - run: make alltest
-  test2:
+  go-version-last:
     docker:
-      - image: circleci/golang:1.15-node
-    working_directory: /go/src/github.com/fatedier/frp
+      - image: cimg/go:1.17-node
     steps:
       - checkout
       - run: make
@@ -21,5 +19,5 @@ workflows:
   version: 2
   build_and_test:
     jobs:
-      - test1
-      - test2
+      - go-version-latest
+      - go-version-last

.github/FUNDING.yml

@@ -0,0 +1,3 @@
+# These are supported funding model platforms
+
+github: [fatedier]

.github/ISSUE_TEMPLATE/bug-report.md

@@ -1,44 +0,0 @@
----
-name: Bug Report
-about: Bug Report for FRP
-title: ''
-labels: Requires Testing
-assignees: ''
-
----
-
-<!-- From Chinese to English by machine translation, welcome to revise and polish. -->
-
-<!-- ⚠️⚠️ Incomplete reports will be marked as invalid, and closed, with few exceptions ⚠️⚠️ -->
-<!-- in addition, please use search well so that the same solution can be found in the feedback, we will close it directly -->
-<!-- for convenience of differentiation, use FRPS or FRPC to refer to the FRP server or client -->
-
-**[REQUIRED] hat version of frp are you using** 
-<!-- Use ./frpc -v or ./frps -v -->
-Version:
-
-**[REQUIRED] What operating system and processor architecture are you using**
-OS:
-CPU architecture:
-
-**[REQUIRED] description of errors**
-
-**confile**
-<!-- Please pay attention to hiding the token, server_addr and other privacy information -->
-
-**log file**
-<!--  If the file is too large, use Pastebin, for example https://pastebin.ubuntu.com/ -->
-
-**Steps to reproduce the issue**
-1. 
-2. 
-3. 
-
-**Supplementary information**
-
-**Can you guess what caused this issue**
-
-**Checklist**:
-<!--- Make sure you've completed the following steps (put an "X" between of brackets): -->
-- [] I included all information required in the sections above
-- [] I made sure there are no duplicates of this report [(Use Search)](https://github.com/fatedier/frp/issues?q=is%3Aissue)

.github/ISSUE_TEMPLATE/bug_report.yaml

@@ -0,0 +1,77 @@
+name: Bug report
+description: Report a bug to help us improve frp
+
+body:
+- type: markdown
+  attributes:
+    value: |
+      Thanks for taking the time to fill out this bug report!
+- type: textarea
+  id: bug-description
+  attributes:
+    label: Bug Description
+    description: Tell us what issues you ran into
+    placeholder: Include information about what you tried, what you expected to happen, and what actually happened. The more details, the better!
+  validations:
+    required: true
+- type: input
+  id: frpc-version
+  attributes:
+    label: frpc Version
+    description: Include the output of `frpc -v`
+  validations:
+    required: true
+- type: input
+  id: frps-version
+  attributes:
+    label: frps Version
+    description: Include the output of `frps -v`
+  validations:
+    required: true
+- type: input
+  id: system-architecture
+  attributes:
+    label: System Architecture
+    description: Include which architecture you used, such as `linux/amd64`, `windows/amd64`
+  validations:
+    required: true
+- type: textarea
+  id: config
+  attributes:
+    label: Configurations
+    description: Include what configurrations you used and ran into this problem
+    placeholder: Pay attention to hiding the token and password in your output
+  validations:
+    required: true
+- type: textarea
+  id: log
+  attributes:
+    label: Logs
+    description: Prefer you providing releated error logs here
+    placeholder: Pay attention to hiding your personal informations
+- type: textarea
+  id: steps-to-reproduce
+  attributes:
+    label: Steps to reproduce
+    description: How to reproduce it? It's important for us to find the bug
+    value: |
+      1. 
+      2. 
+      3. 
+      ...
+- type: checkboxes
+  id: area
+  attributes:
+    label: Affected area
+    options:
+    - label: "Docs"
+    - label: "Installation"
+    - label: "Performance and Scalability"
+    - label: "Security"
+    - label: "User Experience"
+    - label: "Test and Release"
+    - label: "Developer Infrastructure"
+    - label: "Client Plugin"
+    - label: "Server Plugin"
+    - label: "Extensions"
+    - label: "Others"

.github/ISSUE_TEMPLATE/config.yml

@@ -1,5 +1 @@
 blank_issues_enabled: false
-contact_links:
-  - name: DOCS
-    url: https://github.com/fatedier/frp
-    about: Here you can find out how to configure frp.

.github/ISSUE_TEMPLATE/feature_request.md

@@ -1,22 +0,0 @@
----
-name: Feature request
-about: Suggest an idea for this project
-title: ''
-labels: "[+] Enhancement"
-assignees: ''
-
----
-
-<!-- From Chinese to English by machine translation, welcome to revise and polish. -->
-
-**The solution you want**
-<!--A clear and concise description of the solution you want. -->
-
-**Alternatives considered**
-<!--A clear and concise description of any alternative solutions or features you have considered. -->
-
-**How to implement this function**
-<!--Implementation steps for the solution you want. -->
-
-**Application scenarios of this function**
-<!--Make a clear and concise description of the application scenario of the solution you want. -->

.github/ISSUE_TEMPLATE/feature_request.yaml

@@ -0,0 +1,36 @@
+name: Feature Request
+description: Suggest an idea to improve frp
+title: "[Feature Request] "
+
+body:
+- type: markdown
+  attributes:
+    value: |
+      This is only used to request new product features.
+- type: textarea
+  id: feature-request
+  attributes:
+    label: Describe the feature request
+    description: Tell us what's you want and why it should be added in frp.
+  validations:
+    required: true
+- type: textarea
+  id: alternatives
+  attributes:
+    label: Describe alternatives you've considered
+- type: checkboxes
+  id: area
+  attributes:
+    label: Affected area
+    options:
+    - label: "Docs"
+    - label: "Installation"
+    - label: "Performance and Scalability"
+    - label: "Security"
+    - label: "User Experience"
+    - label: "Test and Release"
+    - label: "Developer Infrastructure"
+    - label: "Client Plugin"
+    - label: "Server Plugin"
+    - label: "Extensions"
+    - label: "Others"

.github/workflows/build-and-push-image.yml

@@ -14,27 +14,30 @@ jobs:
     name: Build Golang project
     runs-on: ubuntu-latest
     steps:
-      -
-        name: Set up Go 1.x
+      - name: Set up Go 1.x
         uses: actions/setup-go@v2
         with:
-          go-version: 1.15
-      -
-        run: go version
-      -
-        name: Check out code into the Go module directory
+          go-version: 1.18
+
+      - run: |
+          # https://github.com/actions/setup-go/issues/107
+          cp -f `which go` /usr/bin/go
+
+      - run: go version
+
+      - name: Check out code into the Go module directory
         uses: actions/checkout@v2
-      -
-        name: Build
+
+      - name: Build
         run: make build
-      -
-        name: Archive artifacts for frpc
+
+      - name: Archive artifacts for frpc
         uses: actions/upload-artifact@v1
         with:
           name: frpc
           path: bin/frpc
-      -
-        name: Archive artifacts for frps
+
+      - name: Archive artifacts for frps
         uses: actions/upload-artifact@v1
         with:
           name: frps
@@ -46,42 +49,41 @@ jobs:
     needs: binary
     steps:
       # environment
-      -
-        name: Checkout
+      - name: Checkout
         uses: actions/checkout@v2
         with:
           fetch-depth: '0'
-      -
-        name: Set up QEMU
+
+      - name: Set up QEMU
         uses: docker/setup-qemu-action@v1
-      -
-        name: Set up Docker Buildx
+
+      - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v1
+
       # download binaries of frpc and frps
-      -
-        name: Download binary of frpc
+      - name: Download binary of frpc
         uses: actions/download-artifact@v2
         with:
           name: frpc
           path: bin/frpc
-      -
-        name: Download binary of frps
+
+      - name: Download binary of frps
         uses: actions/download-artifact@v2
         with:
           name: frps
           path: bin/frps
+
       # get image tag name
-      -
-        name: Get Image Tag Name
+      - name: Get Image Tag Name
         run: |
           if [ x${{ github.event.inputs.tag }} == x"" ]; then
             echo "TAG_NAME=${GITHUB_REF#refs/*/}" >> $GITHUB_ENV
           else
             echo "TAG_NAME=${{ github.event.inputs.tag }}" >> $GITHUB_ENV
           fi
+
       # prepare image tags
-      -
-        name: Prepare Image Tags
+      - name: Prepare Image Tags
         run: |
           echo "DOCKERFILE_FRPC_PATH=dockerfiles/Dockerfile-for-frpc" >> $GITHUB_ENV
           echo "DOCKERFILE_FRPS_PATH=dockerfiles/Dockerfile-for-frps" >> $GITHUB_ENV
@@ -89,9 +91,9 @@ jobs:
           echo "TAG_FRPS=fatedier/frps:${{ env.TAG_NAME }}" >> $GITHUB_ENV
           echo "TAG_FRPC_GPR=ghcr.io/fatedier/frpc:${{ env.TAG_NAME }}" >> $GITHUB_ENV
           echo "TAG_FRPS_GPR=ghcr.io/fatedier/frps:${{ env.TAG_NAME }}" >> $GITHUB_ENV
+
       # build images
-      -
-        name: Build Images
+      - name: Build Images
         run: |
           # for Docker hub
           docker build --file ${{ env.DOCKERFILE_FRPC_PATH }} --tag ${{ env.TAG_FRPC }} .
@@ -99,16 +101,16 @@ jobs:
           # for GPR
           docker build --file ${{ env.DOCKERFILE_FRPC_PATH }} --tag ${{ env.TAG_FRPC_GPR }} .
           docker build --file ${{ env.DOCKERFILE_FRPS_PATH }} --tag ${{ env.TAG_FRPS_GPR }} .
+
       # push to dockerhub
-      -
-        name: Publish to Dockerhub
+      - name: Publish to Dockerhub
         run: |
           echo ${{ secrets.DOCKERHUB_PASSWORD }} | docker login --username ${{ secrets.DOCKERHUB_USERNAME }} --password-stdin
           docker push ${{ env.TAG_FRPC }}
           docker push ${{ env.TAG_FRPS }}
+
       # push to gpr
-      -
-        name: Publish to GPR
+      - name: Publish to GPR
         run: |
           echo ${{ secrets.GPR_TOKEN }} | docker login ghcr.io --username ${{ github.repository_owner }} --password-stdin
           docker push ${{ env.TAG_FRPC_GPR }}

.github/workflows/goreleaser.yml

@@ -15,7 +15,11 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v2
         with:
-          go-version: 1.16
+          go-version: 1.18
+          
+      - run: |
+          # https://github.com/actions/setup-go/issues/107
+          cp -f `which go` /usr/bin/go
 
       - name: Make All
         run: |

.github/workflows/stale.yml

@@ -12,15 +12,17 @@ jobs:
   stale:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/stale@v3
+    - uses: actions/stale@v5
       with:
         repo-token: ${{ secrets.GITHUB_TOKEN }}
-        stale-issue-message: 'Issues go stale after 45d of inactivity. Stale issues rot after an additional 10d of inactivity and eventually close.'
-        stale-pr-message: 'Issues go stale after 45d of inactivity. Stale issues rot after an additional 10d of inactivity and eventually close.'
+        stale-issue-message: 'Issues go stale after 30d of inactivity. Stale issues rot after an additional 7d of inactivity and eventually close.'
+        stale-pr-message: "PRs go stale after 30d of inactivity. Stale PRs rot after an additional 7d of inactivity and eventually close."
         stale-issue-label: 'lifecycle/stale'
         exempt-issue-labels: 'bug,doc,enhancement,future,proposal,question,testing,todo,easy,help wanted,assigned'
         stale-pr-label: 'lifecycle/stale'
         exempt-pr-labels: 'bug,doc,enhancement,future,proposal,question,testing,todo,easy,help wanted,assigned'
-        days-before-stale: 45
-        days-before-close: 10
+        days-before-stale: 30
+        days-before-close: 7
         debug-only: ${{ github.event.inputs.debug-only }}
+        exempt-all-pr-milestones: true
+        exempt-all-pr-assignees: true

.goreleaser.yml

@@ -1,7 +1,10 @@
 builds:
   - skip: true
 checksum:
-  name_template: 'checksums.txt'
+  name_template: '{{ .ProjectName }}_{{ .Version }}_sha256_checksums.txt'
+  algorithm: sha256
+  extra_files:
+  - glob: ./release/packages/*
 release:
   # Same as for github
   # Note: it can only be one: either github, gitlab or gitea

Makefile

@@ -12,9 +12,6 @@ file:
 	rm -rf ./assets/frpc/static/*
 	cp -rf ./web/frps/dist/* ./assets/frps/static
 	cp -rf ./web/frpc/dist/* ./assets/frpc/static
-	rm -rf ./assets/frps/statik
-	rm -rf ./assets/frpc/statik
-	go generate ./assets/...
 
 fmt:
 	go fmt ./...
@@ -34,13 +31,13 @@ gotest:
 	go test -v --cover ./server/...
 	go test -v --cover ./pkg/...
 
-ci:
-	go test -count=1 -p=1 -v ./tests/...
-
 e2e:
 	./hack/run-e2e.sh
 
-alltest: gotest ci e2e
+e2e-trace:
+	DEBUG=true LOG_LEVEL=trace ./hack/run-e2e.sh
+
+alltest: gotest e2e
 	
 clean:
 	rm -f ./bin/frpc

README.md

@@ -6,6 +6,32 @@
 
 [README](README.md) | [中文文档](README_zh.md)
 
+<h3 align="center">Platinum Sponsors</h3>
+<!--platinum sponsors start-->
+
+<p align="center">
+  <a href="https://www.doppler.com/?utm_campaign=github_repo&utm_medium=referral&utm_content=frp&utm_source=github" target="_blank">
+    <img width="400px" src="https://raw.githubusercontent.com/fatedier/frp/dev/doc/pic/sponsor_doppler.png">
+  </a>
+</p>
+
+<!--platinum sponsors end-->
+
+<h3 align="center">Gold Sponsors</h3>
+<!--gold sponsors start-->
+
+<p align="center">
+  <a href="https://workos.com/?utm_campaign=github_repo&utm_medium=referral&utm_content=frp&utm_source=github" target="_blank">
+    <img width="300px" src="https://raw.githubusercontent.com/fatedier/frp/dev/doc/pic/sponsor_workos.png">
+  </a>
+</p>
+
+<!--gold sponsors end-->
+
+<h3 align="center">Silver Sponsors</h3>
+
+* Sakura Frp - 欢迎点击 "加入我们"
+
 ## What is frp?
 
 frp is a fast reverse proxy to help you expose a local server behind a NAT or firewall to the Internet. As of now, it supports **TCP** and **UDP**, as well as **HTTP** and **HTTPS** protocols, where requests can be forwarded to internal services by domain name.
@@ -24,12 +50,13 @@ frp also has a P2P connect mode.
     * [Forward DNS query request](#forward-dns-query-request)
     * [Forward Unix domain socket](#forward-unix-domain-socket)
     * [Expose a simple HTTP file server](#expose-a-simple-http-file-server)
-    * [Enable HTTPS for local HTTP service](#enable-https-for-local-http-service)
+    * [Enable HTTPS for local HTTP(S) service](#enable-https-for-local-https-service)
     * [Expose your service privately](#expose-your-service-privately)
     * [P2P Mode](#p2p-mode)
 * [Features](#features)
     * [Configuration Files](#configuration-files)
     * [Using Environment Variables](#using-environment-variables)
+    * [Split Configures Into Different Files](#split-configures-into-different-files)
     * [Dashboard](#dashboard)
     * [Admin UI](#admin-ui)
     * [Monitor](#monitor)
@@ -66,8 +93,7 @@ frp also has a P2P connect mode.
 * [Development Plan](#development-plan)
 * [Contributing](#contributing)
 * [Donation](#donation)
-    * [AliPay](#alipay)
-    * [Wechat Pay](#wechat-pay)
+    * [GitHub Sponsors](#github-sponsors)
     * [PayPal](#paypal)
 
 <!-- vim-markdown-toc -->
@@ -76,7 +102,9 @@ frp also has a P2P connect mode.
 
 frp is under development. Try the latest release version in the `master` branch, or use the `dev` branch for the version in development.
 
-**The protocol might change at a release and we don't promise backwards compatibility. Please check the release log when upgrading the client and the server.**
+We are working on v2 version and trying to do some code refactor and improvements. It won't be compatible with v1.
+
+We will switch v0 to v1 at the right time and only accept bug fixes and improvements instead of big feature requirements.
 
 ## Architecture
 
@@ -412,6 +440,27 @@ export FRP_SSH_REMOTE_PORT="6000"
 
 `frpc` will render configuration file template using OS environment variables. Remember to prefix your reference with `.Envs`.
 
+### Split Configures Into Different Files
+
+You can split multiple proxy configs into different files and include them in the main file.
+
+```ini
+# frpc.ini
+[common]
+server_addr = x.x.x.x
+server_port = 7000
+includes=./confd/*.ini
+```
+
+```ini
+# ./confd/test.ini
+[ssh]
+type = tcp
+local_ip = 127.0.0.1
+local_port = 22
+remote_port = 6000
+```
+
 ### Dashboard
 
 Check frp's status and proxies' statistics information by Dashboard.
@@ -421,12 +470,12 @@ Configure a port for dashboard to enable this feature:
 ```ini
 [common]
 dashboard_port = 7500
-# dashboard's username and password are both optional，if not set, default is admin.
+# dashboard's username and password are both optional
 dashboard_user = admin
 dashboard_pwd = admin
 ```
 
-Then visit `http://[server_addr]:7500` to see the dashboard, with username and password both being `admin` by default.
+Then visit `http://[server_addr]:7500` to see the dashboard, with username and password both being `admin`.
 
 ![dashboard](/doc/pic/dashboard.png)
 
@@ -444,7 +493,7 @@ admin_user = admin
 admin_pwd = admin
 ```
 
-Then visit `http://127.0.0.1:7400` to see admin UI, with username and password both being `admin` by default.
+Then visit `http://127.0.0.1:7400` to see admin UI, with username and password both being `admin`.
 
 ### Monitor
 
@@ -624,10 +673,12 @@ admin_addr = 127.0.0.1
 admin_port = 7400
 ```
 
-Then run command `frpc reload -c ./frpc.ini` and wait for about 10 seconds to let `frpc` create or update or delete proxies.
+Then run command `frpc reload -c ./frpc.ini` and wait for about 10 seconds to let `frpc` create or update or remove proxies.
 
 **Note that parameters in [common] section won't be modified except 'start'.**
 
+You can run command `frpc verify -c ./frpc.ini` before reloading to check if there are config errors.
+
 ### Get proxy status from client
 
 Use `frpc status -c ./frpc.ini` to get status of all proxies. The `admin_addr` and `admin_port` fields are required for enabling HTTP API.
@@ -843,7 +894,7 @@ In this example, it will set header `X-From-Where: frp` in the HTTP request.
 
 This feature is for http proxy only.
 
-You can get user's real IP from HTTP request headers `X-Forwarded-For` and `X-Real-IP`.
+You can get user's real IP from HTTP request headers `X-Forwarded-For`.
 
 #### Proxy Protocol
 
@@ -959,11 +1010,13 @@ server_port = 7000
 type = tcpmux
 multiplexer = httpconnect
 custom_domains = test1
+local_port = 80
 
 [proxy2]
 type = tcpmux
 multiplexer = httpconnect
 custom_domains = test2
+local_port = 8080
 ```
 
 In the above configuration - frps can be contacted on port 1337 with a HTTP CONNECT header such as:
@@ -1049,15 +1102,11 @@ Interested in getting involved? We would like to help you!
 
 If frp helps you a lot, you can support us by:
 
-frp QQ group: 606194980
+### GitHub Sponsors
 
-### AliPay
+Support us by [Github Sponsors](https://github.com/sponsors/fatedier).
 
-![donation-alipay](/doc/pic/donate-alipay.png)
-
-### Wechat Pay
-
-![donation-wechatpay](/doc/pic/donate-wechatpay.png)
+You can have your company's logo placed on README file of this project.
 
 ### PayPal
 

README_zh.md

@@ -7,6 +7,32 @@
 
 frp 是一个专注于内网穿透的高性能的反向代理应用，支持 TCP、UDP、HTTP、HTTPS 等多种协议。可以将内网服务以安全、便捷的方式通过具有公网 IP 节点的中转暴露到公网。
 
+<h3 align="center">Platinum Sponsors</h3>
+<!--platinum sponsors start-->
+
+<p align="center">
+  <a href="https://www.doppler.com/?utm_campaign=github_repo&utm_medium=referral&utm_content=frp&utm_source=github" target="_blank">
+    <img width="400px" src="https://raw.githubusercontent.com/fatedier/frp/dev/doc/pic/sponsor_doppler.png">
+  </a>
+</p>
+
+<!--platinum sponsors end-->
+
+<h3 align="center">Gold Sponsors</h3>
+<!--gold sponsors start-->
+
+<p align="center">
+  <a href="https://workos.com/?utm_campaign=github_repo&utm_medium=referral&utm_content=frp&utm_source=github" target="_blank">
+    <img width="300px" src="https://raw.githubusercontent.com/fatedier/frp/dev/doc/pic/sponsor_workos.png">
+  </a>
+</p>
+
+<!--gold sponsors end-->
+
+<h3 align="center">Silver Sponsors</h3>
+
+* Sakura Frp - 欢迎点击 "加入我们"
+
 ## 为什么使用 frp ？
 
 通过在具有公网 IP 的节点上部署 frp 服务端，可以轻松地将内网服务穿透到公网，同时提供诸多专业的功能特性，这包括：
@@ -25,6 +51,10 @@ frp 目前已被很多公司广泛用于测试、生产环境。
 
 master 分支用于发布稳定版本，dev 分支用于开发，您可以尝试下载最新的 release 版本进行测试。
 
+我们正在进行 v2 大版本的开发，将会尝试在各个方面进行重构和升级，且不会与 v1 版本进行兼容，预计会持续一段时间。
+
+现在的 v0 版本将会在合适的时间切换为 v1 版本并且保证兼容性，后续只做 bug 修复和优化，不再进行大的功能性更新。
+
 ## 文档
 
 完整文档已经迁移至 [https://gofrp.org](https://gofrp.org/docs)。
@@ -46,6 +76,12 @@ frp 是一个免费且开源的项目，我们欢迎任何人为其开发和进
 
 如果您觉得 frp 对你有帮助，欢迎给予我们一定的捐助来维持项目的长期发展。
 
+### GitHub Sponsors
+
+您可以通过 [GitHub Sponsors](https://github.com/sponsors/fatedier) 赞助我们。
+
+企业赞助者可以将贵公司的 Logo 以及链接放置在项目 README 文件中。
+
 ### 知识星球
 
 如果您想学习 frp 相关的知识和技术，或者寻求任何帮助及咨询，都可以通过微信扫描下方的二维码付费加入知识星球的官方社群：
@@ -59,7 +95,3 @@ frp 是一个免费且开源的项目，我们欢迎任何人为其开发和进
 ### 微信支付捐赠
 
 ![donate-wechatpay](/doc/pic/donate-wechatpay.png)
-
-### Paypal 捐赠
-
-海外用户推荐通过 [Paypal](https://www.paypal.me/fatedier) 向我的账户 **fatedier@gmail.com** 进行捐赠。

Release.md

@@ -0,0 +1,8 @@
+### New
+
+* Support go http pprof.
+
+### Improve
+
+* Change underlying TCP connection keepalive interval to 2 hours.
+* Create new connection to server for `sudp` visitor when needed, to avoid frequent reconnections.

assets/assets.go

@@ -14,22 +14,15 @@
 
 package assets
 
-//go:generate statik -src=./frps/static -dest=./frps
-//go:generate statik -src=./frpc/static -dest=./frpc
-//go:generate go fmt ./frps/statik/statik.go
-//go:generate go fmt ./frpc/statik/statik.go
-
 import (
-	"io/ioutil"
+	"io/fs"
 	"net/http"
-	"os"
-	"path"
-
-	"github.com/rakyll/statik/fs"
 )
 
 var (
-	// store static files in memory by statik
+	// read-only filesystem created by "embed" for embedded files
+	content fs.FS
+
 	FileSystem http.FileSystem
 
 	// if prefix is not empty, we get file content from disk
@@ -38,40 +31,18 @@ var (
 
 // if path is empty, load assets in memory
 // or set FileSystem using disk files
-func Load(path string) (err error) {
+func Load(path string) {
 	prefixPath = path
 	if prefixPath != "" {
 		FileSystem = http.Dir(prefixPath)
-		return nil
 	} else {
-		FileSystem, err = fs.New()
+		FileSystem = http.FS(content)
 	}
-	return err
 }
 
-func ReadFile(file string) (content string, err error) {
-	if prefixPath == "" {
-		file, err := FileSystem.Open(path.Join("/", file))
-		if err != nil {
-			return content, err
-		}
-		defer file.Close()
-		buf, err := ioutil.ReadAll(file)
-		if err != nil {
-			return content, err
-		}
-		content = string(buf)
-	} else {
-		file, err := os.Open(path.Join(prefixPath, file))
-		if err != nil {
-			return content, err
-		}
-		defer file.Close()
-		buf, err := ioutil.ReadAll(file)
-		if err != nil {
-			return content, err
-		}
-		content = string(buf)
+func Register(fileSystem fs.FS) {
+	subFs, err := fs.Sub(fileSystem, "static")
+	if err == nil {
+		content = subFs
 	}
-	return content, err
 }

assets/frpc/embed.go

@@ -0,0 +1,14 @@
+package frpc
+
+import (
+	"embed"
+
+	"github.com/fatedier/frp/assets"
+)
+
+//go:embed static/*
+var content embed.FS
+
+func init() {
+	assets.Register(content)
+}

assets/frpc/static/index.html

@@ -1 +1 @@
-<!doctype html> <html lang=en> <head> <meta charset=utf-8> <title>frp client admin UI</title> <link rel="shortcut icon" href="favicon.ico"></head> <body> <div id=app></div> <script type="text/javascript" src="manifest.js?f30e0e5ff7dbde4611e0"></script><script type="text/javascript" src="vendor.js?a82aed5fb0b844cbdb29"></script></body> </html> 
+<!doctype html> <html lang=en> <head> <meta charset=utf-8> <title>frp client admin UI</title> <link rel="shortcut icon" href="favicon.ico"></head> <body> <div id=app></div> <script type="text/javascript" src="manifest.js?5d5774096cf5c1b4d5af"></script><script type="text/javascript" src="vendor.js?dc42700731a508d39009"></script></body> </html> 

assets/frpc/static/manifest.js

@@ -1 +1 @@
-!function(e){function n(r){if(t[r])return t[r].exports;var o=t[r]={i:r,l:!1,exports:{}};return e[r].call(o.exports,o,o.exports,n),o.l=!0,o.exports}var r=window.webpackJsonp;window.webpackJsonp=function(t,c,u){for(var i,a,f,l=0,s=[];l<t.length;l++)a=t[l],o[a]&&s.push(o[a][0]),o[a]=0;for(i in c)Object.prototype.hasOwnProperty.call(c,i)&&(e[i]=c[i]);for(r&&r(t,c,u);s.length;)s.shift()();if(u)for(l=0;l<u.length;l++)f=n(n.s=u[l]);return f};var t={},o={1:0};n.e=function(e){function r(){i.onerror=i.onload=null,clearTimeout(a);var n=o[e];0!==n&&(n&&n[1](new Error("Loading chunk "+e+" failed.")),o[e]=void 0)}var t=o[e];if(0===t)return new Promise(function(e){e()});if(t)return t[2];var c=new Promise(function(n,r){t=o[e]=[n,r]});t[2]=c;var u=document.getElementsByTagName("head")[0],i=document.createElement("script");i.type="text/javascript",i.charset="utf-8",i.async=!0,i.timeout=12e4,n.nc&&i.setAttribute("nonce",n.nc),i.src=n.p+""+e+".js?"+{0:"a82aed5fb0b844cbdb29"}[e];var a=setTimeout(r,12e4);return i.onerror=i.onload=r,u.appendChild(i),c},n.m=e,n.c=t,n.i=function(e){return e},n.d=function(e,r,t){n.o(e,r)||Object.defineProperty(e,r,{configurable:!1,enumerable:!0,get:t})},n.n=function(e){var r=e&&e.__esModule?function(){return e.default}:function(){return e};return n.d(r,"a",r),r},n.o=function(e,n){return Object.prototype.hasOwnProperty.call(e,n)},n.p="",n.oe=function(e){throw console.error(e),e}}([]);
+!function(e){function n(r){if(t[r])return t[r].exports;var o=t[r]={i:r,l:!1,exports:{}};return e[r].call(o.exports,o,o.exports,n),o.l=!0,o.exports}var r=window.webpackJsonp;window.webpackJsonp=function(t,c,u){for(var i,a,f,l=0,s=[];l<t.length;l++)a=t[l],o[a]&&s.push(o[a][0]),o[a]=0;for(i in c)Object.prototype.hasOwnProperty.call(c,i)&&(e[i]=c[i]);for(r&&r(t,c,u);s.length;)s.shift()();if(u)for(l=0;l<u.length;l++)f=n(n.s=u[l]);return f};var t={},o={1:0};n.e=function(e){function r(){i.onerror=i.onload=null,clearTimeout(a);var n=o[e];0!==n&&(n&&n[1](new Error("Loading chunk "+e+" failed.")),o[e]=void 0)}var t=o[e];if(0===t)return new Promise(function(e){e()});if(t)return t[2];var c=new Promise(function(n,r){t=o[e]=[n,r]});t[2]=c;var u=document.getElementsByTagName("head")[0],i=document.createElement("script");i.type="text/javascript",i.charset="utf-8",i.async=!0,i.timeout=12e4,n.nc&&i.setAttribute("nonce",n.nc),i.src=n.p+""+e+".js?"+{0:"dc42700731a508d39009"}[e];var a=setTimeout(r,12e4);return i.onerror=i.onload=r,u.appendChild(i),c},n.m=e,n.c=t,n.i=function(e){return e},n.d=function(e,r,t){n.o(e,r)||Object.defineProperty(e,r,{configurable:!1,enumerable:!0,get:t})},n.n=function(e){var r=e&&e.__esModule?function(){return e.default}:function(){return e};return n.d(r,"a",r),r},n.o=function(e,n){return Object.prototype.hasOwnProperty.call(e,n)},n.p="",n.oe=function(e){throw console.error(e),e}}([]);

assets/frps/embed.go

@@ -0,0 +1,14 @@
+package frpc
+
+import (
+	"embed"
+
+	"github.com/fatedier/frp/assets"
+)
+
+//go:embed static/*
+var content embed.FS
+
+func init() {
+	assets.Register(content)
+}

assets/frps/static/index.html

@@ -1 +1 @@
-<!doctype html> <html lang=en> <head> <meta charset=utf-8> <title>frps dashboard</title> <link rel="shortcut icon" href="favicon.ico"></head> <body> <div id=app></div> <script type="text/javascript" src="manifest.js?782d7b1b910e824ac986"></script><script type="text/javascript" src="vendor.js?7f899297af075fb3b085"></script></body> </html> 
+<!doctype html> <html lang=en> <head> <meta charset=utf-8> <title>frps dashboard</title> <link rel="shortcut icon" href="favicon.ico"></head> <body> <div id=app></div> <script type="text/javascript" src="manifest.js?5d154ba4c6b342d8c0c3"></script><script type="text/javascript" src="vendor.js?ddbd1f69fb6e67be4b78"></script></body> </html> 

assets/frps/static/manifest.js

@@ -1 +1 @@
-!function(e){function n(r){if(t[r])return t[r].exports;var o=t[r]={i:r,l:!1,exports:{}};return e[r].call(o.exports,o,o.exports,n),o.l=!0,o.exports}var r=window.webpackJsonp;window.webpackJsonp=function(t,u,c){for(var i,a,f,l=0,s=[];l<t.length;l++)a=t[l],o[a]&&s.push(o[a][0]),o[a]=0;for(i in u)Object.prototype.hasOwnProperty.call(u,i)&&(e[i]=u[i]);for(r&&r(t,u,c);s.length;)s.shift()();if(c)for(l=0;l<c.length;l++)f=n(n.s=c[l]);return f};var t={},o={1:0};n.e=function(e){function r(){i.onerror=i.onload=null,clearTimeout(a);var n=o[e];0!==n&&(n&&n[1](new Error("Loading chunk "+e+" failed.")),o[e]=void 0)}var t=o[e];if(0===t)return new Promise(function(e){e()});if(t)return t[2];var u=new Promise(function(n,r){t=o[e]=[n,r]});t[2]=u;var c=document.getElementsByTagName("head")[0],i=document.createElement("script");i.type="text/javascript",i.charset="utf-8",i.async=!0,i.timeout=12e4,n.nc&&i.setAttribute("nonce",n.nc),i.src=n.p+""+e+".js?"+{0:"7f899297af075fb3b085"}[e];var a=setTimeout(r,12e4);return i.onerror=i.onload=r,c.appendChild(i),u},n.m=e,n.c=t,n.i=function(e){return e},n.d=function(e,r,t){n.o(e,r)||Object.defineProperty(e,r,{configurable:!1,enumerable:!0,get:t})},n.n=function(e){var r=e&&e.__esModule?function(){return e.default}:function(){return e};return n.d(r,"a",r),r},n.o=function(e,n){return Object.prototype.hasOwnProperty.call(e,n)},n.p="",n.oe=function(e){throw console.error(e),e}}([]);
+!function(e){function n(r){if(t[r])return t[r].exports;var o=t[r]={i:r,l:!1,exports:{}};return e[r].call(o.exports,o,o.exports,n),o.l=!0,o.exports}var r=window.webpackJsonp;window.webpackJsonp=function(t,u,c){for(var i,a,f,l=0,s=[];l<t.length;l++)a=t[l],o[a]&&s.push(o[a][0]),o[a]=0;for(i in u)Object.prototype.hasOwnProperty.call(u,i)&&(e[i]=u[i]);for(r&&r(t,u,c);s.length;)s.shift()();if(c)for(l=0;l<c.length;l++)f=n(n.s=c[l]);return f};var t={},o={1:0};n.e=function(e){function r(){i.onerror=i.onload=null,clearTimeout(a);var n=o[e];0!==n&&(n&&n[1](new Error("Loading chunk "+e+" failed.")),o[e]=void 0)}var t=o[e];if(0===t)return new Promise(function(e){e()});if(t)return t[2];var u=new Promise(function(n,r){t=o[e]=[n,r]});t[2]=u;var c=document.getElementsByTagName("head")[0],i=document.createElement("script");i.type="text/javascript",i.charset="utf-8",i.async=!0,i.timeout=12e4,n.nc&&i.setAttribute("nonce",n.nc),i.src=n.p+""+e+".js?"+{0:"ddbd1f69fb6e67be4b78"}[e];var a=setTimeout(r,12e4);return i.onerror=i.onload=r,c.appendChild(i),u},n.m=e,n.c=t,n.i=function(e){return e},n.d=function(e,r,t){n.o(e,r)||Object.defineProperty(e,r,{configurable:!1,enumerable:!0,get:t})},n.n=function(e){var r=e&&e.__esModule?function(){return e.default}:function(){return e};return n.d(r,"a",r),r},n.o=function(e,n){return Object.prototype.hasOwnProperty.call(e,n)},n.p="",n.oe=function(e){throw console.error(e),e}}([]);

client/admin.go

@@ -17,6 +17,7 @@ package client
 import (
 	"net"
 	"net/http"
+	"net/http/pprof"
 	"time"
 
 	"github.com/fatedier/frp/assets"
@@ -26,27 +27,39 @@ import (
 )
 
 var (
-	httpServerReadTimeout  = 10 * time.Second
-	httpServerWriteTimeout = 10 * time.Second
+	httpServerReadTimeout  = 60 * time.Second
+	httpServerWriteTimeout = 60 * time.Second
 )
 
 func (svr *Service) RunAdminServer(address string) (err error) {
 	// url router
 	router := mux.NewRouter()
 
-	user, passwd := svr.cfg.AdminUser, svr.cfg.AdminPwd
-	router.Use(frpNet.NewHTTPAuthMiddleware(user, passwd).Middleware)
+	router.HandleFunc("/healthz", svr.healthz)
 
-	// api, see dashboard_api.go
-	router.HandleFunc("/api/reload", svr.apiReload).Methods("GET")
-	router.HandleFunc("/api/status", svr.apiStatus).Methods("GET")
-	router.HandleFunc("/api/config", svr.apiGetConfig).Methods("GET")
-	router.HandleFunc("/api/config", svr.apiPutConfig).Methods("PUT")
+	// debug
+	if svr.cfg.PprofEnable {
+		router.HandleFunc("/debug/pprof/cmdline", pprof.Cmdline)
+		router.HandleFunc("/debug/pprof/profile", pprof.Profile)
+		router.HandleFunc("/debug/pprof/symbol", pprof.Symbol)
+		router.HandleFunc("/debug/pprof/trace", pprof.Trace)
+		router.PathPrefix("/debug/pprof/").HandlerFunc(pprof.Index)
+	}
+
+	subRouter := router.NewRoute().Subrouter()
+	user, passwd := svr.cfg.AdminUser, svr.cfg.AdminPwd
+	subRouter.Use(frpNet.NewHTTPAuthMiddleware(user, passwd).Middleware)
+
+	// api, see admin_api.go
+	subRouter.HandleFunc("/api/reload", svr.apiReload).Methods("GET")
+	subRouter.HandleFunc("/api/status", svr.apiStatus).Methods("GET")
+	subRouter.HandleFunc("/api/config", svr.apiGetConfig).Methods("GET")
+	subRouter.HandleFunc("/api/config", svr.apiPutConfig).Methods("PUT")
 
 	// view
-	router.Handle("/favicon.ico", http.FileServer(assets.FileSystem)).Methods("GET")
-	router.PathPrefix("/static/").Handler(frpNet.MakeHTTPGzipHandler(http.StripPrefix("/static/", http.FileServer(assets.FileSystem)))).Methods("GET")
-	router.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+	subRouter.Handle("/favicon.ico", http.FileServer(assets.FileSystem)).Methods("GET")
+	subRouter.PathPrefix("/static/").Handler(frpNet.MakeHTTPGzipHandler(http.StripPrefix("/static/", http.FileServer(assets.FileSystem)))).Methods("GET")
+	subRouter.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
 		http.Redirect(w, r, "/static/", http.StatusMovedPermanently)
 	})
 

client/admin_api.go

@@ -17,8 +17,9 @@ package client
 import (
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net/http"
+	"os"
 	"sort"
 	"strings"
 
@@ -32,37 +33,25 @@ type GeneralResponse struct {
 	Msg  string
 }
 
-// GET api/reload
+// /healthz
+func (svr *Service) healthz(w http.ResponseWriter, r *http.Request) {
+	w.WriteHeader(200)
+}
 
+// GET api/reload
 func (svr *Service) apiReload(w http.ResponseWriter, r *http.Request) {
 	res := GeneralResponse{Code: 200}
 
-	log.Info("Http request [/api/reload]")
+	log.Info("api request [/api/reload]")
 	defer func() {
-		log.Info("Http response [/api/reload], code [%d]", res.Code)
+		log.Info("api response [/api/reload], code [%d]", res.Code)
 		w.WriteHeader(res.Code)
 		if len(res.Msg) > 0 {
 			w.Write([]byte(res.Msg))
 		}
 	}()
 
-	content, err := config.GetRenderedConfFromFile(svr.cfgFile)
-	if err != nil {
-		res.Code = 400
-		res.Msg = err.Error()
-		log.Warn("reload frpc config file error: %s", res.Msg)
-		return
-	}
-
-	newCommonCfg, err := config.UnmarshalClientConfFromIni(content)
-	if err != nil {
-		res.Code = 400
-		res.Msg = err.Error()
-		log.Warn("reload frpc common section error: %s", res.Msg)
-		return
-	}
-
-	pxyCfgs, visitorCfgs, err := config.LoadAllProxyConfsFromIni(svr.cfg.User, content, newCommonCfg.Start)
+	_, pxyCfgs, visitorCfgs, err := config.ParseClientConfig(svr.cfgFile)
 	if err != nil {
 		res.Code = 400
 		res.Msg = err.Error()
@@ -70,8 +59,7 @@ func (svr *Service) apiReload(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	err = svr.ReloadConf(pxyCfgs, visitorCfgs)
-	if err != nil {
+	if err = svr.ReloadConf(pxyCfgs, visitorCfgs); err != nil {
 		res.Code = 500
 		res.Msg = err.Error()
 		log.Warn("reload frpc proxy config error: %s", res.Msg)
@@ -269,7 +257,7 @@ func (svr *Service) apiPutConfig(w http.ResponseWriter, r *http.Request) {
 	}()
 
 	// get new config content
-	body, err := ioutil.ReadAll(r.Body)
+	body, err := io.ReadAll(r.Body)
 	if err != nil {
 		res.Code = 400
 		res.Msg = fmt.Sprintf("read request body error: %v", err)
@@ -286,7 +274,7 @@ func (svr *Service) apiPutConfig(w http.ResponseWriter, r *http.Request) {
 
 	// get token from origin content
 	token := ""
-	b, err := ioutil.ReadFile(svr.cfgFile)
+	b, err := os.ReadFile(svr.cfgFile)
 	if err != nil {
 		res.Code = 400
 		res.Msg = err.Error()
@@ -325,7 +313,7 @@ func (svr *Service) apiPutConfig(w http.ResponseWriter, r *http.Request) {
 	}
 	content = strings.Join(newRows, "\n")
 
-	err = ioutil.WriteFile(svr.cfgFile, []byte(content), 0644)
+	err = os.WriteFile(svr.cfgFile, []byte(content), 0644)
 	if err != nil {
 		res.Code = 500
 		res.Msg = fmt.Sprintf("write content to frpc config file error: %v", err)

client/control.go

@@ -34,6 +34,7 @@ import (
 
 	"github.com/fatedier/golib/control/shutdown"
 	"github.com/fatedier/golib/crypto"
+	libdial "github.com/fatedier/golib/net/dial"
 	fmux "github.com/hashicorp/yamux"
 )
 
@@ -182,9 +183,16 @@ func (ctl *Control) HandleNewProxyResp(inMsg *msg.NewProxyResp) {
 }
 
 func (ctl *Control) Close() error {
+	return ctl.GracefulClose(0)
+}
+
+func (ctl *Control) GracefulClose(d time.Duration) error {
 	ctl.pm.Close()
-	ctl.conn.Close()
 	ctl.vm.Close()
+
+	time.Sleep(d)
+
+	ctl.conn.Close()
 	if ctl.session != nil {
 		ctl.session.Close()
 	}
@@ -227,12 +235,38 @@ func (ctl *Control) connectServer() (conn net.Conn, err error) {
 			}
 		}
 
-		address := net.JoinHostPort(ctl.clientCfg.ServerAddr, strconv.Itoa(ctl.clientCfg.ServerPort))
-		conn, err = frpNet.ConnectServerByProxyWithTLS(ctl.clientCfg.HTTPProxy, ctl.clientCfg.Protocol, address, tlsConfig)
-
+		proxyType, addr, auth, err := libdial.ParseProxyURL(ctl.clientCfg.HTTPProxy)
+		if err != nil {
+			xl.Error("fail to parse proxy url")
+			return nil, err
+		}
+		dialOptions := []libdial.DialOption{}
+		protocol := ctl.clientCfg.Protocol
+		if protocol == "websocket" {
+			protocol = "tcp"
+			dialOptions = append(dialOptions, libdial.WithAfterHook(libdial.AfterHook{Hook: frpNet.DialHookWebsocket()}))
+		}
+		if ctl.clientCfg.ConnectServerLocalIP != "" {
+			dialOptions = append(dialOptions, libdial.WithLocalAddr(ctl.clientCfg.ConnectServerLocalIP))
+		}
+		dialOptions = append(dialOptions,
+			libdial.WithProtocol(protocol),
+			libdial.WithTimeout(time.Duration(ctl.clientCfg.DialServerTimeout)*time.Second),
+			libdial.WithKeepAlive(time.Duration(ctl.clientCfg.DialServerKeepAlive)*time.Second),
+			libdial.WithProxy(proxyType, addr),
+			libdial.WithProxyAuth(auth),
+			libdial.WithTLSConfig(tlsConfig),
+			libdial.WithAfterHook(libdial.AfterHook{
+				Hook: frpNet.DialHookCustomTLSHeadByte(tlsConfig != nil, ctl.clientCfg.DisableCustomTLSFirstByte),
+			}),
+		)
+		conn, err = libdial.Dial(
+			net.JoinHostPort(ctl.clientCfg.ServerAddr, strconv.Itoa(ctl.clientCfg.ServerPort)),
+			dialOptions...,
+		)
 		if err != nil {
 			xl.Warn("start new connection to server error: %v", err)
-			return
+			return nil, err
 		}
 	}
 	return
@@ -301,16 +335,27 @@ func (ctl *Control) msgHandler() {
 	}()
 	defer ctl.msgHandlerShutdown.Done()
 
-	hbSend := time.NewTicker(time.Duration(ctl.clientCfg.HeartbeatInterval) * time.Second)
-	defer hbSend.Stop()
-	hbCheck := time.NewTicker(time.Second)
-	defer hbCheck.Stop()
+	var hbSendCh <-chan time.Time
+	// TODO(fatedier): disable heartbeat if TCPMux is enabled.
+	// Just keep it here to keep compatible with old version frps.
+	if ctl.clientCfg.HeartbeatInterval > 0 {
+		hbSend := time.NewTicker(time.Duration(ctl.clientCfg.HeartbeatInterval) * time.Second)
+		defer hbSend.Stop()
+		hbSendCh = hbSend.C
+	}
+
+	var hbCheckCh <-chan time.Time
+	// Check heartbeat timeout only if TCPMux is not enabled and users don't disable heartbeat feature.
+	if ctl.clientCfg.HeartbeatInterval > 0 && ctl.clientCfg.HeartbeatTimeout > 0 && !ctl.clientCfg.TCPMux {
+		hbCheck := time.NewTicker(time.Second)
+		defer hbCheck.Stop()
+		hbCheckCh = hbCheck.C
+	}
 
 	ctl.lastPong = time.Now()
-
 	for {
 		select {
-		case <-hbSend.C:
+		case <-hbSendCh:
 			// send heartbeat to server
 			xl.Debug("send heartbeat to server")
 			pingMsg := &msg.Ping{}
@@ -319,7 +364,7 @@ func (ctl *Control) msgHandler() {
 				return
 			}
 			ctl.sendCh <- pingMsg
-		case <-hbCheck.C:
+		case <-hbCheckCh:
 			if time.Since(ctl.lastPong) > time.Duration(ctl.clientCfg.HeartbeatTimeout)*time.Second {
 				xl.Warn("heartbeat timeout")
 				// let reader() stop

client/health/health.go

@@ -19,7 +19,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net"
 	"net/http"
 	"time"
@@ -162,7 +161,7 @@ func (monitor *Monitor) doHTTPCheck(ctx context.Context) error {
 		return err
 	}
 	defer resp.Body.Close()
-	io.Copy(ioutil.Discard, resp.Body)
+	io.Copy(io.Discard, resp.Body)
 
 	if resp.StatusCode/100 != 2 {
 		return fmt.Errorf("do http health check, StatusCode is [%d] not 2xx", resp.StatusCode)

client/proxy/proxy.go

@@ -19,7 +19,6 @@ import (
 	"context"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net"
 	"strconv"
 	"strings"
@@ -36,6 +35,7 @@ import (
 
 	"github.com/fatedier/golib/errors"
 	frpIo "github.com/fatedier/golib/io"
+	libdial "github.com/fatedier/golib/net/dial"
 	"github.com/fatedier/golib/pool"
 	fmux "github.com/hashicorp/yamux"
 	pp "github.com/pires/go-proxyproto"
@@ -347,22 +347,18 @@ func (pxy *XTCPProxy) InWorkConn(conn net.Conn, m *msg.StartWorkConn) {
 	xl.Trace("get natHoleRespMsg, sid [%s], client address [%s] visitor address [%s]", natHoleRespMsg.Sid, natHoleRespMsg.ClientAddr, natHoleRespMsg.VisitorAddr)
 
 	// Send detect message
-	array := strings.Split(natHoleRespMsg.VisitorAddr, ":")
-	if len(array) <= 1 {
-		xl.Error("get NatHoleResp visitor address error: %v", natHoleRespMsg.VisitorAddr)
+	host, portStr, err := net.SplitHostPort(natHoleRespMsg.VisitorAddr)
+	if err != nil {
+		xl.Error("get NatHoleResp visitor address [%s] error: %v", natHoleRespMsg.VisitorAddr, err)
 	}
 	laddr, _ := net.ResolveUDPAddr("udp", clientConn.LocalAddr().String())
-	/*
-		for i := 1000; i < 65000; i++ {
-			pxy.sendDetectMsg(array[0], int64(i), laddr, "a")
-		}
-	*/
-	port, err := strconv.ParseInt(array[1], 10, 64)
+
+	port, err := strconv.ParseInt(portStr, 10, 64)
 	if err != nil {
 		xl.Error("get natHoleResp visitor address error: %v", natHoleRespMsg.VisitorAddr)
 		return
 	}
-	pxy.sendDetectMsg(array[0], int(port), laddr, []byte(natHoleRespMsg.Sid))
+	pxy.sendDetectMsg(host, int(port), laddr, []byte(natHoleRespMsg.Sid))
 	xl.Trace("send all detect msg done")
 
 	msg.WriteMsg(conn, &msg.NatHoleClientDetectOK{})
@@ -401,7 +397,7 @@ func (pxy *XTCPProxy) InWorkConn(conn net.Conn, m *msg.StartWorkConn) {
 
 	fmuxCfg := fmux.DefaultConfig()
 	fmuxCfg.KeepAliveInterval = 5 * time.Second
-	fmuxCfg.LogOutput = ioutil.Discard
+	fmuxCfg.LogOutput = io.Discard
 	sess, err := fmux.Server(kcpConn, fmuxCfg)
 	if err != nil {
 		xl.Error("create yamux server from kcp connection error: %v", err)
@@ -757,12 +753,12 @@ func HandleTCPWorkConnection(ctx context.Context, localInfo *config.LocalSvrConf
 			if m.DstAddr == "" {
 				m.DstAddr = "127.0.0.1"
 			}
+			srcAddr, _ := net.ResolveTCPAddr("tcp", net.JoinHostPort(m.SrcAddr, strconv.Itoa(int(m.SrcPort))))
+			dstAddr, _ := net.ResolveTCPAddr("tcp", net.JoinHostPort(m.DstAddr, strconv.Itoa(int(m.DstPort))))
 			h := &pp.Header{
-				Command:            pp.PROXY,
-				SourceAddress:      net.ParseIP(m.SrcAddr),
-				SourcePort:         m.SrcPort,
-				DestinationAddress: net.ParseIP(m.DstAddr),
-				DestinationPort:    m.DstPort,
+				Command:         pp.PROXY,
+				SourceAddr:      srcAddr,
+				DestinationAddr: dstAddr,
 			}
 
 			if strings.Contains(m.SrcAddr, ".") {
@@ -791,7 +787,10 @@ func HandleTCPWorkConnection(ctx context.Context, localInfo *config.LocalSvrConf
 		return
 	}
 
-	localConn, err := frpNet.ConnectServer("tcp", fmt.Sprintf("%s:%d", localInfo.LocalIP, localInfo.LocalPort))
+	localConn, err := libdial.Dial(
+		net.JoinHostPort(localInfo.LocalIP, strconv.Itoa(localInfo.LocalPort)),
+		libdial.WithTimeout(10*time.Second),
+	)
 	if err != nil {
 		workConn.Close()
 		xl.Error("connect to local service [%s:%d] error: %v", localInfo.LocalIP, localInfo.LocalPort, err)

client/proxy/proxy_wrapper.go

@@ -227,7 +227,7 @@ func (pw *Wrapper) InWorkConn(workConn net.Conn, m *msg.StartWorkConn) {
 	pw.mu.RLock()
 	pxy := pw.pxy
 	pw.mu.RUnlock()
-	if pxy != nil {
+	if pxy != nil && pw.Phase == ProxyPhaseRunning {
 		xl.Debug("start a new work connection, localAddr: %s remoteAddr: %s", workConn.LocalAddr().String(), workConn.RemoteAddr().String())
 		go pxy.InWorkConn(workConn, m)
 	} else {

client/service.go

@@ -17,9 +17,8 @@ package client
 import (
 	"context"
 	"crypto/tls"
-	"errors"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net"
 	"runtime"
 	"strconv"
@@ -34,8 +33,10 @@ import (
 	"github.com/fatedier/frp/pkg/transport"
 	"github.com/fatedier/frp/pkg/util/log"
 	frpNet "github.com/fatedier/frp/pkg/util/net"
+	"github.com/fatedier/frp/pkg/util/util"
 	"github.com/fatedier/frp/pkg/util/version"
 	"github.com/fatedier/frp/pkg/util/xlog"
+	libdial "github.com/fatedier/golib/net/dial"
 
 	fmux "github.com/hashicorp/yamux"
 )
@@ -108,7 +109,7 @@ func (svr *Service) Run() error {
 			if svr.cfg.LoginFailExit {
 				return err
 			}
-			time.Sleep(10 * time.Second)
+			util.RandomSleep(10*time.Second, 0.9, 1.1)
 		} else {
 			// login success
 			ctl := NewControl(svr.ctx, svr.runID, conn, session, svr.cfg, svr.pxyCfgs, svr.visitorCfgs, svr.serverUDPPort, svr.authSetter)
@@ -124,13 +125,10 @@ func (svr *Service) Run() error {
 
 	if svr.cfg.AdminPort != 0 {
 		// Init admin server assets
-		err := assets.Load(svr.cfg.AssetsDir)
-		if err != nil {
-			return fmt.Errorf("Load assets error: %v", err)
-		}
+		assets.Load(svr.cfg.AssetsDir)
 
 		address := net.JoinHostPort(svr.cfg.AdminAddr, strconv.Itoa(svr.cfg.AdminPort))
-		err = svr.RunAdminServer(address)
+		err := svr.RunAdminServer(address)
 		if err != nil {
 			log.Warn("run admin server error: %v", err)
 		}
@@ -160,8 +158,11 @@ func (svr *Service) keepControllerWorking() {
 
 		// the first three retry with no delay
 		if reconnectCounts > 3 {
-			time.Sleep(reconnectDelay)
+			util.RandomSleep(reconnectDelay, 0.9, 1.1)
+			xl.Info("wait %v to reconnect", reconnectDelay)
 			reconnectDelay *= 2
+		} else {
+			util.RandomSleep(time.Second, 0, 0.5)
 		}
 		reconnectCounts++
 
@@ -177,18 +178,12 @@ func (svr *Service) keepControllerWorking() {
 			xl.Info("try to reconnect to server...")
 			conn, session, err := svr.login()
 			if err != nil {
-				xl.Warn("reconnect to server error: %v", err)
-				time.Sleep(delayTime)
+				xl.Warn("reconnect to server error: %v, wait %v for another retry", err, delayTime)
+				util.RandomSleep(delayTime, 0.9, 1.1)
 
-				opErr := &net.OpError{}
-				// quick retry for dial error
-				if errors.As(err, &opErr) && opErr.Op == "dial" {
-					delayTime = 2 * time.Second
-				} else {
-					delayTime = delayTime * 2
-					if delayTime > maxDelayTime {
-						delayTime = maxDelayTime
-					}
+				delayTime = delayTime * 2
+				if delayTime > maxDelayTime {
+					delayTime = maxDelayTime
 				}
 				continue
 			}
@@ -231,8 +226,35 @@ func (svr *Service) login() (conn net.Conn, session *fmux.Session, err error) {
 		}
 	}
 
-	address := net.JoinHostPort(svr.cfg.ServerAddr, strconv.Itoa(svr.cfg.ServerPort))
-	conn, err = frpNet.ConnectServerByProxyWithTLS(svr.cfg.HTTPProxy, svr.cfg.Protocol, address, tlsConfig)
+	proxyType, addr, auth, err := libdial.ParseProxyURL(svr.cfg.HTTPProxy)
+	if err != nil {
+		xl.Error("fail to parse proxy url")
+		return
+	}
+	dialOptions := []libdial.DialOption{}
+	protocol := svr.cfg.Protocol
+	if protocol == "websocket" {
+		protocol = "tcp"
+		dialOptions = append(dialOptions, libdial.WithAfterHook(libdial.AfterHook{Hook: frpNet.DialHookWebsocket()}))
+	}
+	if svr.cfg.ConnectServerLocalIP != "" {
+		dialOptions = append(dialOptions, libdial.WithLocalAddr(svr.cfg.ConnectServerLocalIP))
+	}
+	dialOptions = append(dialOptions,
+		libdial.WithProtocol(protocol),
+		libdial.WithTimeout(time.Duration(svr.cfg.DialServerTimeout)*time.Second),
+		libdial.WithKeepAlive(time.Duration(svr.cfg.DialServerKeepAlive)*time.Second),
+		libdial.WithProxy(proxyType, addr),
+		libdial.WithProxyAuth(auth),
+		libdial.WithTLSConfig(tlsConfig),
+		libdial.WithAfterHook(libdial.AfterHook{
+			Hook: frpNet.DialHookCustomTLSHeadByte(tlsConfig != nil, svr.cfg.DisableCustomTLSFirstByte),
+		}),
+	)
+	conn, err = libdial.Dial(
+		net.JoinHostPort(svr.cfg.ServerAddr, strconv.Itoa(svr.cfg.ServerPort)),
+		dialOptions...,
+	)
 	if err != nil {
 		return
 	}
@@ -248,8 +270,8 @@ func (svr *Service) login() (conn net.Conn, session *fmux.Session, err error) {
 
 	if svr.cfg.TCPMux {
 		fmuxCfg := fmux.DefaultConfig()
-		fmuxCfg.KeepAliveInterval = 20 * time.Second
-		fmuxCfg.LogOutput = ioutil.Discard
+		fmuxCfg.KeepAliveInterval = time.Duration(svr.cfg.TCPMuxKeepaliveInterval) * time.Second
+		fmuxCfg.LogOutput = io.Discard
 		session, err = fmux.Client(conn, fmuxCfg)
 		if err != nil {
 			return
@@ -315,9 +337,13 @@ func (svr *Service) ReloadConf(pxyCfgs map[string]config.ProxyConf, visitorCfgs
 }
 
 func (svr *Service) Close() {
+	svr.GracefulClose(time.Duration(0))
+}
+
+func (svr *Service) GracefulClose(d time.Duration) {
 	atomic.StoreUint32(&svr.exit, 1)
 	if svr.ctl != nil {
-		svr.ctl.Close()
+		svr.ctl.GracefulClose(d)
 	}
 	svr.cancel()
 }

client/visitor.go

@@ -19,8 +19,8 @@ import (
 	"context"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net"
+	"strconv"
 	"sync"
 	"time"
 
@@ -86,7 +86,7 @@ type STCPVisitor struct {
 }
 
 func (sv *STCPVisitor) Run() (err error) {
-	sv.l, err = net.Listen("tcp", fmt.Sprintf("%s:%d", sv.cfg.BindAddr, sv.cfg.BindPort))
+	sv.l, err = net.Listen("tcp", net.JoinHostPort(sv.cfg.BindAddr, strconv.Itoa(sv.cfg.BindPort)))
 	if err != nil {
 		return
 	}
@@ -175,7 +175,7 @@ type XTCPVisitor struct {
 }
 
 func (sv *XTCPVisitor) Run() (err error) {
-	sv.l, err = net.Listen("tcp", fmt.Sprintf("%s:%d", sv.cfg.BindAddr, sv.cfg.BindPort))
+	sv.l, err = net.Listen("tcp", net.JoinHostPort(sv.cfg.BindAddr, strconv.Itoa(sv.cfg.BindPort)))
 	if err != nil {
 		return
 	}
@@ -308,7 +308,7 @@ func (sv *XTCPVisitor) handleConn(userConn net.Conn) {
 
 	fmuxCfg := fmux.DefaultConfig()
 	fmuxCfg.KeepAliveInterval = 5 * time.Second
-	fmuxCfg.LogOutput = ioutil.Discard
+	fmuxCfg.LogOutput = io.Discard
 	sess, err := fmux.Client(remote, fmuxCfg)
 	if err != nil {
 		xl.Error("create yamux session error: %v", err)
@@ -353,7 +353,7 @@ type SUDPVisitor struct {
 func (sv *SUDPVisitor) Run() (err error) {
 	xl := xlog.FromContextSafe(sv.ctx)
 
-	addr, err := net.ResolveUDPAddr("udp", fmt.Sprintf("%s:%d", sv.cfg.BindAddr, sv.cfg.BindPort))
+	addr, err := net.ResolveUDPAddr("udp", net.JoinHostPort(sv.cfg.BindAddr, strconv.Itoa(sv.cfg.BindPort)))
 	if err != nil {
 		return fmt.Errorf("sudp ResolveUDPAddr error: %v", err)
 	}
@@ -366,7 +366,7 @@ func (sv *SUDPVisitor) Run() (err error) {
 	sv.sendCh = make(chan *msg.UDPPacket, 1024)
 	sv.readCh = make(chan *msg.UDPPacket, 1024)
 
-	xl.Info("sudp start to work")
+	xl.Info("sudp start to work, listen on %s", addr)
 
 	go sv.dispatcher()
 	go udp.ForwardUserConn(sv.udpConn, sv.readCh, sv.sendCh, int(sv.ctl.clientCfg.UDPPacketSize))
@@ -377,29 +377,33 @@ func (sv *SUDPVisitor) Run() (err error) {
 func (sv *SUDPVisitor) dispatcher() {
 	xl := xlog.FromContextSafe(sv.ctx)
 
+	var (
+		visitorConn net.Conn
+		err         error
+
+		firstPacket *msg.UDPPacket
+	)
+
 	for {
-		// loop for get frpc to frps tcp conn
-		// setup worker
-		// wait worker to finished
-		// retry or exit
-		visitorConn, err := sv.getNewVisitorConn()
-		if err != nil {
-			// check if proxy is closed
-			// if checkCloseCh is close, we will return, other case we will continue to reconnect
-			select {
-			case <-sv.checkCloseCh:
+		select {
+		case firstPacket = <-sv.sendCh:
+			if firstPacket == nil {
 				xl.Info("frpc sudp visitor proxy is closed")
 				return
-			default:
 			}
+		case <-sv.checkCloseCh:
+			xl.Info("frpc sudp visitor proxy is closed")
+			return
+		}
 
-			time.Sleep(3 * time.Second)
-
+		visitorConn, err = sv.getNewVisitorConn()
+		if err != nil {
 			xl.Warn("newVisitorConn to frps error: %v, try to reconnect", err)
 			continue
 		}
 
-		sv.worker(visitorConn)
+		// visitorConn always be closed when worker done.
+		sv.worker(visitorConn, firstPacket)
 
 		select {
 		case <-sv.checkCloseCh:
@@ -407,9 +411,10 @@ func (sv *SUDPVisitor) dispatcher() {
 		default:
 		}
 	}
+
 }
 
-func (sv *SUDPVisitor) worker(workConn net.Conn) {
+func (sv *SUDPVisitor) worker(workConn net.Conn, firstPacket *msg.UDPPacket) {
 	xl := xlog.FromContextSafe(sv.ctx)
 	xl.Debug("starting sudp proxy worker")
 
@@ -446,7 +451,7 @@ func (sv *SUDPVisitor) worker(workConn net.Conn) {
 			case *msg.UDPPacket:
 				if errRet := errors.PanicToError(func() {
 					sv.readCh <- m
-					xl.Trace("frpc visitor get udp packet from frpc")
+					xl.Trace("frpc visitor get udp packet from workConn: %s", m.Content)
 				}); errRet != nil {
 					xl.Info("reader goroutine for udp work connection closed")
 					return
@@ -463,6 +468,14 @@ func (sv *SUDPVisitor) worker(workConn net.Conn) {
 		}()
 
 		var errRet error
+		if firstPacket != nil {
+			if errRet = msg.WriteMsg(conn, firstPacket); errRet != nil {
+				xl.Warn("sender goroutine for udp work connection closed: %v", errRet)
+				return
+			}
+			xl.Trace("send udp package to workConn: %s", firstPacket.Content)
+		}
+
 		for {
 			select {
 			case udpMsg, ok := <-sv.sendCh:
@@ -475,6 +488,7 @@ func (sv *SUDPVisitor) worker(workConn net.Conn) {
 					xl.Warn("sender goroutine for udp work connection closed: %v", errRet)
 					return
 				}
+				xl.Trace("send udp package to workConn: %s", udpMsg.Content)
 			case <-closeCh:
 				return
 			}

cmd/frpc/main.go

@@ -18,7 +18,7 @@ import (
 	"math/rand"
 	"time"
 
-	_ "github.com/fatedier/frp/assets/frpc/statik"
+	_ "github.com/fatedier/frp/assets/frpc"
 	"github.com/fatedier/frp/cmd/frpc/sub"
 
 	"github.com/fatedier/golib/crypto"

cmd/frpc/sub/http.go

@@ -47,7 +47,7 @@ var httpCmd = &cobra.Command{
 	Use:   "http",
 	Short: "Run frpc with a single http proxy",
 	RunE: func(cmd *cobra.Command, args []string) error {
-		clientCfg, err := parseClientCommonCfg(CfgFileTypeCmd, nil)
+		clientCfg, err := parseClientCommonCfgFromCmd()
 		if err != nil {
 			fmt.Println(err)
 			os.Exit(1)

cmd/frpc/sub/https.go

@@ -43,7 +43,7 @@ var httpsCmd = &cobra.Command{
 	Use:   "https",
 	Short: "Run frpc with a single https proxy",
 	RunE: func(cmd *cobra.Command, args []string) error {
-		clientCfg, err := parseClientCommonCfg(CfgFileTypeCmd, nil)
+		clientCfg, err := parseClientCommonCfgFromCmd()
 		if err != nil {
 			fmt.Println(err)
 			os.Exit(1)

cmd/frpc/sub/reload.go

@@ -17,7 +17,7 @@ package sub
 import (
 	"encoding/base64"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net/http"
 	"os"
 	"strings"
@@ -35,19 +35,13 @@ var reloadCmd = &cobra.Command{
 	Use:   "reload",
 	Short: "Hot-Reload frpc configuration",
 	RunE: func(cmd *cobra.Command, args []string) error {
-		iniContent, err := config.GetRenderedConfFromFile(cfgFile)
+		cfg, _, _, err := config.ParseClientConfig(cfgFile)
 		if err != nil {
 			fmt.Println(err)
 			os.Exit(1)
 		}
 
-		clientCfg, err := parseClientCommonCfg(CfgFileTypeIni, iniContent)
-		if err != nil {
-			fmt.Println(err)
-			os.Exit(1)
-		}
-
-		err = reload(clientCfg)
+		err = reload(cfg)
 		if err != nil {
 			fmt.Printf("frpc reload error: %v\n", err)
 			os.Exit(1)
@@ -82,7 +76,7 @@ func reload(clientCfg config.ClientCommonConf) error {
 		return nil
 	}
 
-	body, err := ioutil.ReadAll(resp.Body)
+	body, err := io.ReadAll(resp.Body)
 	if err != nil {
 		return err
 	}

cmd/frpc/sub/root.go

@@ -124,30 +124,10 @@ func handleSignal(svr *client.Service) {
 	ch := make(chan os.Signal)
 	signal.Notify(ch, syscall.SIGINT, syscall.SIGTERM)
 	<-ch
-	svr.Close()
-	time.Sleep(250 * time.Millisecond)
+	svr.GracefulClose(500 * time.Millisecond)
 	close(kcpDoneCh)
 }
 
-func parseClientCommonCfg(fileType int, source []byte) (cfg config.ClientCommonConf, err error) {
-	if fileType == CfgFileTypeIni {
-		cfg, err = config.UnmarshalClientConfFromIni(source)
-	} else if fileType == CfgFileTypeCmd {
-		cfg, err = parseClientCommonCfgFromCmd()
-	}
-	if err != nil {
-		return
-	}
-
-	cfg.Complete()
-	err = cfg.Validate()
-	if err != nil {
-		err = fmt.Errorf("Parse config error: %v", err)
-		return
-	}
-	return
-}
-
 func parseClientCommonCfgFromCmd() (cfg config.ClientCommonConf, err error) {
 	cfg = config.GetDefaultClientConf()
 
@@ -176,26 +156,19 @@ func parseClientCommonCfgFromCmd() (cfg config.ClientCommonConf, err error) {
 	cfg.Token = token
 	cfg.TLSEnable = tlsEnable
 
+	cfg.Complete()
+	if err = cfg.Validate(); err != nil {
+		err = fmt.Errorf("Parse config error: %v", err)
+		return
+	}
 	return
 }
 
-func runClient(cfgFilePath string) (err error) {
-	var content []byte
-	content, err = config.GetRenderedConfFromFile(cfgFilePath)
+func runClient(cfgFilePath string) error {
+	cfg, pxyCfgs, visitorCfgs, err := config.ParseClientConfig(cfgFilePath)
 	if err != nil {
 		return err
 	}
-
-	cfg, err := parseClientCommonCfg(CfgFileTypeIni, content)
-	if err != nil {
-		return err
-	}
-
-	pxyCfgs, visitorCfgs, err := config.LoadAllProxyConfsFromIni(cfg.User, content, cfg.Start)
-	if err != nil {
-		return err
-	}
-
 	return startService(cfg, pxyCfgs, visitorCfgs, cfgFilePath)
 }
 
@@ -234,7 +207,7 @@ func startService(
 	}
 
 	err = svr.Run()
-	if cfg.Protocol == "kcp" {
+	if err == nil && cfg.Protocol == "kcp" {
 		<-kcpDoneCh
 	}
 	return

cmd/frpc/sub/status.go

@@ -18,7 +18,7 @@ import (
 	"encoding/base64"
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net/http"
 	"os"
 	"strings"
@@ -38,20 +38,13 @@ var statusCmd = &cobra.Command{
 	Use:   "status",
 	Short: "Overview of all proxies status",
 	RunE: func(cmd *cobra.Command, args []string) error {
-		iniContent, err := config.GetRenderedConfFromFile(cfgFile)
+		cfg, _, _, err := config.ParseClientConfig(cfgFile)
 		if err != nil {
 			fmt.Println(err)
 			os.Exit(1)
 		}
 
-		clientCfg, err := parseClientCommonCfg(CfgFileTypeIni, iniContent)
-		if err != nil {
-			fmt.Println(err)
-			os.Exit(1)
-		}
-
-		err = status(clientCfg)
-		if err != nil {
+		if err = status(cfg); err != nil {
 			fmt.Printf("frpc get status error: %v\n", err)
 			os.Exit(1)
 		}
@@ -84,7 +77,7 @@ func status(clientCfg config.ClientCommonConf) error {
 		return fmt.Errorf("admin api status code [%d]", resp.StatusCode)
 	}
 
-	body, err := ioutil.ReadAll(resp.Body)
+	body, err := io.ReadAll(resp.Body)
 	if err != nil {
 		return err
 	}
@@ -96,7 +89,7 @@ func status(clientCfg config.ClientCommonConf) error {
 
 	fmt.Println("Proxy Status...")
 	if len(res.TCP) > 0 {
-		fmt.Printf("TCP")
+		fmt.Println("TCP")
 		tbl := table.New("Name", "Status", "LocalAddr", "Plugin", "RemoteAddr", "Error")
 		for _, ps := range res.TCP {
 			tbl.AddRow(ps.Name, ps.Status, ps.LocalAddr, ps.Plugin, ps.RemoteAddr, ps.Err)
@@ -105,7 +98,7 @@ func status(clientCfg config.ClientCommonConf) error {
 		fmt.Println("")
 	}
 	if len(res.UDP) > 0 {
-		fmt.Printf("UDP")
+		fmt.Println("UDP")
 		tbl := table.New("Name", "Status", "LocalAddr", "Plugin", "RemoteAddr", "Error")
 		for _, ps := range res.UDP {
 			tbl.AddRow(ps.Name, ps.Status, ps.LocalAddr, ps.Plugin, ps.RemoteAddr, ps.Err)
@@ -114,7 +107,7 @@ func status(clientCfg config.ClientCommonConf) error {
 		fmt.Println("")
 	}
 	if len(res.HTTP) > 0 {
-		fmt.Printf("HTTP")
+		fmt.Println("HTTP")
 		tbl := table.New("Name", "Status", "LocalAddr", "Plugin", "RemoteAddr", "Error")
 		for _, ps := range res.HTTP {
 			tbl.AddRow(ps.Name, ps.Status, ps.LocalAddr, ps.Plugin, ps.RemoteAddr, ps.Err)
@@ -123,7 +116,7 @@ func status(clientCfg config.ClientCommonConf) error {
 		fmt.Println("")
 	}
 	if len(res.HTTPS) > 0 {
-		fmt.Printf("HTTPS")
+		fmt.Println("HTTPS")
 		tbl := table.New("Name", "Status", "LocalAddr", "Plugin", "RemoteAddr", "Error")
 		for _, ps := range res.HTTPS {
 			tbl.AddRow(ps.Name, ps.Status, ps.LocalAddr, ps.Plugin, ps.RemoteAddr, ps.Err)
@@ -132,7 +125,7 @@ func status(clientCfg config.ClientCommonConf) error {
 		fmt.Println("")
 	}
 	if len(res.STCP) > 0 {
-		fmt.Printf("STCP")
+		fmt.Println("STCP")
 		tbl := table.New("Name", "Status", "LocalAddr", "Plugin", "RemoteAddr", "Error")
 		for _, ps := range res.STCP {
 			tbl.AddRow(ps.Name, ps.Status, ps.LocalAddr, ps.Plugin, ps.RemoteAddr, ps.Err)
@@ -141,7 +134,7 @@ func status(clientCfg config.ClientCommonConf) error {
 		fmt.Println("")
 	}
 	if len(res.XTCP) > 0 {
-		fmt.Printf("XTCP")
+		fmt.Println("XTCP")
 		tbl := table.New("Name", "Status", "LocalAddr", "Plugin", "RemoteAddr", "Error")
 		for _, ps := range res.XTCP {
 			tbl.AddRow(ps.Name, ps.Status, ps.LocalAddr, ps.Plugin, ps.RemoteAddr, ps.Err)

cmd/frpc/sub/stcp.go

@@ -45,7 +45,7 @@ var stcpCmd = &cobra.Command{
 	Use:   "stcp",
 	Short: "Run frpc with a single stcp proxy",
 	RunE: func(cmd *cobra.Command, args []string) error {
-		clientCfg, err := parseClientCommonCfg(CfgFileTypeCmd, nil)
+		clientCfg, err := parseClientCommonCfgFromCmd()
 		if err != nil {
 			fmt.Println(err)
 			os.Exit(1)

cmd/frpc/sub/sudp.go

@@ -45,7 +45,7 @@ var sudpCmd = &cobra.Command{
 	Use:   "sudp",
 	Short: "Run frpc with a single sudp proxy",
 	RunE: func(cmd *cobra.Command, args []string) error {
-		clientCfg, err := parseClientCommonCfg(CfgFileTypeCmd, nil)
+		clientCfg, err := parseClientCommonCfgFromCmd()
 		if err != nil {
 			fmt.Println(err)
 			os.Exit(1)

cmd/frpc/sub/tcp.go

@@ -41,7 +41,7 @@ var tcpCmd = &cobra.Command{
 	Use:   "tcp",
 	Short: "Run frpc with a single tcp proxy",
 	RunE: func(cmd *cobra.Command, args []string) error {
-		clientCfg, err := parseClientCommonCfg(CfgFileTypeCmd, nil)
+		clientCfg, err := parseClientCommonCfgFromCmd()
 		if err != nil {
 			fmt.Println(err)
 			os.Exit(1)

cmd/frpc/sub/tcpmux.go

@@ -44,7 +44,7 @@ var tcpMuxCmd = &cobra.Command{
 	Use:   "tcpmux",
 	Short: "Run frpc with a single tcpmux proxy",
 	RunE: func(cmd *cobra.Command, args []string) error {
-		clientCfg, err := parseClientCommonCfg(CfgFileTypeCmd, nil)
+		clientCfg, err := parseClientCommonCfgFromCmd()
 		if err != nil {
 			fmt.Println(err)
 			os.Exit(1)

cmd/frpc/sub/udp.go

@@ -41,7 +41,7 @@ var udpCmd = &cobra.Command{
 	Use:   "udp",
 	Short: "Run frpc with a single udp proxy",
 	RunE: func(cmd *cobra.Command, args []string) error {
-		clientCfg, err := parseClientCommonCfg(CfgFileTypeCmd, nil)
+		clientCfg, err := parseClientCommonCfgFromCmd()
 		if err != nil {
 			fmt.Println(err)
 			os.Exit(1)

cmd/frpc/sub/verify.go

@@ -0,0 +1,43 @@
+// Copyright 2021 The frp Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package sub
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/fatedier/frp/pkg/config"
+
+	"github.com/spf13/cobra"
+)
+
+func init() {
+	rootCmd.AddCommand(verifyCmd)
+}
+
+var verifyCmd = &cobra.Command{
+	Use:   "verify",
+	Short: "Verify that the configures is valid",
+	RunE: func(cmd *cobra.Command, args []string) error {
+		_, _, _, err := config.ParseClientConfig(cfgFile)
+		if err != nil {
+			fmt.Println(err)
+			os.Exit(1)
+		}
+
+		fmt.Printf("frpc: the configuration file %s syntax is ok\n", cfgFile)
+		return nil
+	},
+}

cmd/frpc/sub/xtcp.go

@@ -45,7 +45,7 @@ var xtcpCmd = &cobra.Command{
 	Use:   "xtcp",
 	Short: "Run frpc with a single xtcp proxy",
 	RunE: func(cmd *cobra.Command, args []string) error {
-		clientCfg, err := parseClientCommonCfg(CfgFileTypeCmd, nil)
+		clientCfg, err := parseClientCommonCfgFromCmd()
 		if err != nil {
 			fmt.Println(err)
 			os.Exit(1)

cmd/frps/main.go

@@ -20,7 +20,7 @@ import (
 
 	"github.com/fatedier/golib/crypto"
 
-	_ "github.com/fatedier/frp/assets/frps/statik"
+	_ "github.com/fatedier/frp/assets/frps"
 	_ "github.com/fatedier/frp/pkg/metrics"
 )
 

cmd/frps/verify.go

@@ -0,0 +1,53 @@
+// Copyright 2021 The frp Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package main
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/fatedier/frp/pkg/config"
+
+	"github.com/spf13/cobra"
+)
+
+func init() {
+	rootCmd.AddCommand(verifyCmd)
+}
+
+var verifyCmd = &cobra.Command{
+	Use:   "verify",
+	Short: "Verify that the configures is valid",
+	RunE: func(cmd *cobra.Command, args []string) error {
+		if cfgFile == "" {
+			fmt.Println("no config file is specified")
+			return nil
+		}
+		iniContent, err := config.GetRenderedConfFromFile(cfgFile)
+		if err != nil {
+			fmt.Println(err)
+			os.Exit(1)
+		}
+
+		_, err = parseServerCommonCfg(CfgFileTypeIni, iniContent)
+		if err != nil {
+			fmt.Println(err)
+			os.Exit(1)
+		}
+
+		fmt.Printf("frps: the configuration file %s syntax is ok\n", cfgFile)
+		return nil
+	},
+}

conf/frpc_full.ini

@@ -6,6 +6,13 @@
 server_addr = 0.0.0.0
 server_port = 7000
 
+# The maximum amount of time a dial to server will wait for a connect to complete. Default value is 10 seconds.
+# dial_server_timeout = 10
+
+# dial_server_keepalive specifies the interval between keep-alive probes for an active network connection between frpc and frps.
+# If negative, keep-alive probes are disabled.
+# dial_server_keepalive = 7200
+
 # if you want to connect frps by http proxy or socks5 proxy or ntlm proxy, you can set http_proxy here or in global environment variables
 # it only works when protocol is tcp
 # http_proxy = http://user:passwd@192.168.1.128:8080
@@ -48,6 +55,12 @@ oidc_audience =
 # It will be used to get an OIDC token if AuthenticationMethod == "oidc". By default, this value is "".
 oidc_token_endpoint_url =
 
+# oidc_additional_xxx specifies additional parameters to be sent to the OIDC Token Endpoint.
+# For example, if you want to specify the "audience" parameter, you can set as follow.
+# frp will add "audience=<value>" "var1=<value>" to the additional parameters.
+# oidc_additional_audience = https://dev.auth.com/api/v2/
+# oidc_additional_var1 = foobar
+
 # set admin address for control frpc's action by http api such as reload
 admin_addr = 127.0.0.1
 admin_port = 7400
@@ -60,7 +73,11 @@ admin_pwd = admin
 pool_count = 5
 
 # if tcp stream multiplexing is used, default is true, it must be same with frps
-tcp_mux = true
+# tcp_mux = true
+
+# specify keep alive interval for tcp mux.
+# only valid if tcp_mux is true.
+# tcp_mux_keepalive_interval = 60
 
 # your proxy name will be changed to {user}.{proxy}
 user = your_name
@@ -73,6 +90,10 @@ login_fail_exit = true
 # now it supports tcp, kcp and websocket, default is tcp
 protocol = tcp
 
+# set client binding ip when connect server, default is empty.
+# only when protocol = tcp or websocket, the value will be used.
+connect_server_local_ip = 0.0.0.0
+
 # if tls_enable is true, frpc will connect frps by tls
 tls_enable = true
 
@@ -89,7 +110,8 @@ tls_enable = true
 # start = ssh,dns
 
 # heartbeat configure, it's not recommended to modify the default value
-# the default value of heartbeat_interval is 10 and heartbeat_timeout is 90
+# The default value of heartbeat_interval is 10 and heartbeat_timeout is 90. Set negative value
+# to disable it.
 # heartbeat_interval = 30
 # heartbeat_timeout = 90
 
@@ -102,6 +124,17 @@ meta_var2 = 234
 # It affects the udp and sudp proxy.
 udp_packet_size = 1500
 
+# include other config files for proxies.
+# includes = ./confd/*.ini
+
+# By default, frpc will connect frps with first custom byte if tls is enabled.
+# If DisableCustomTLSFirstByte is true, frpc will not send that custom byte.
+disable_custom_tls_first_byte = false
+
+# Enable golang pprof handlers in admin listener.
+# Admin port must be set first.
+pprof_enable = false
+
 # 'ssh' is the unique proxy name
 # if user in [common] section is not empty, it will be changed to {user}.{proxy} such as 'your_name.ssh'
 [ssh]
@@ -178,9 +211,9 @@ use_compression = true
 # if not set, you can access this custom_domains without certification
 http_user = admin
 http_pwd = admin
-# if domain for frps is frps.com, then you can access [web01] proxy by URL http://test.frps.com
+# if domain for frps is frps.com, then you can access [web01] proxy by URL http://web01.frps.com
 subdomain = web01
-custom_domains = web02.yourdomain.com
+custom_domains = web01.yourdomain.com
 # locations is only available for http type
 locations = /,/pic
 host_header_rewrite = example.com

conf/frps_full.ini

@@ -36,7 +36,7 @@ vhost_https_port = 443
 dashboard_addr = 0.0.0.0
 dashboard_port = 7500
 
-# dashboard user and passwd for basic auth protect, if not set, both default value is admin
+# dashboard user and passwd for basic auth protect
 dashboard_user = admin
 dashboard_pwd = admin
 
@@ -86,13 +86,12 @@ oidc_audience =
 # By default, this value is false.
 oidc_skip_expiry_check = false
 
-
 # oidc_skip_issuer_check specifies whether to skip checking if the OIDC token's issuer claim matches the issuer specified in OidcIssuer.
 # By default, this value is false.
 oidc_skip_issuer_check = false
 
 # heartbeat configure, it's not recommended to modify the default value
-# the default value of heartbeat_timeout is 90
+# the default value of heartbeat_timeout is 90. Set negative value to disable it.
 # heartbeat_timeout = 90
 
 # user_conn_timeout configure, it's not recommended to modify the default value
@@ -120,7 +119,15 @@ tls_only = false
 subdomain_host = frps.com
 
 # if tcp stream multiplexing is used, default is true
-tcp_mux = true
+# tcp_mux = true
+
+# specify keep alive interval for tcp mux.
+# only valid if tcp_mux is true.
+# tcp_mux_keepalive_interval = 60
+
+# tcp_keepalive specifies the interval between keep-alive probes for an active network connection between frpc and frps.
+# If negative, keep-alive probes are disabled.
+# tcp_keepalive = 7200
 
 # custom 404 page for HTTP requests
 # custom_404_page = /path/to/404.html
@@ -130,6 +137,10 @@ tcp_mux = true
 # It affects the udp and sudp proxy.
 udp_packet_size = 1500
 
+# Enable golang pprof handlers in dashboard listener.
+# Dashboard port must be set first
+pprof_enable = false
+
 [plugin.user-manager]
 addr = 127.0.0.1:9000
 path = /handler

conf/systemd/frpc.service

@@ -9,6 +9,7 @@ Restart=on-failure
 RestartSec=5s
 ExecStart=/usr/bin/frpc -c /etc/frp/frpc.ini
 ExecReload=/usr/bin/frpc reload -c /etc/frp/frpc.ini
+LimitNOFILE=1048576
 
 [Install]
 WantedBy=multi-user.target

conf/systemd/frpc@.service

@@ -3,12 +3,13 @@ Description=Frp Client Service
 After=network.target
 
 [Service]
-Type=idle
+Type=simple
 User=nobody
 Restart=on-failure
 RestartSec=5s
 ExecStart=/usr/bin/frpc -c /etc/frp/%i.ini
 ExecReload=/usr/bin/frpc reload -c /etc/frp/%i.ini
+LimitNOFILE=1048576
 
 [Install]
 WantedBy=multi-user.target

conf/systemd/frps.service

@@ -8,6 +8,7 @@ User=nobody
 Restart=on-failure
 RestartSec=5s
 ExecStart=/usr/bin/frps -c /etc/frp/frps.ini
+LimitNOFILE=1048576
 
 [Install]
 WantedBy=multi-user.target

conf/systemd/frps@.service

@@ -8,6 +8,7 @@ User=nobody
 Restart=on-failure
 RestartSec=5s
 ExecStart=/usr/bin/frps -c /etc/frp/%i.ini
+LimitNOFILE=1048576
 
 [Install]
 WantedBy=multi-user.target

doc/server_plugin.md

@@ -70,7 +70,7 @@ The response can look like any of the following:
 
 ### Operation
 
-Currently `Login`, `NewProxy`, `Ping`, `NewWorkConn` and `NewUserConn` operations are supported.
+Currently `Login`, `NewProxy`, `CloseProxy`, `Ping`, `NewWorkConn` and `NewUserConn` operations are supported.
 
 #### Login
 
@@ -88,7 +88,8 @@ Client login operation
         "privilege_key": <string>,
         "run_id": <string>,
         "pool_count": <int>,
-        "metas": map<string>string
+        "metas": map<string>string,
+        "client_address": <string>
     }
 }
 ```
@@ -135,6 +136,26 @@ Create new proxy
 }
 ```
 
+#### CloseProxy
+
+A previously created proxy is closed.
+
+Please note that one request will be sent for every proxy that is closed, do **NOT** use this
+if you have too many proxies bound to a single client, as this may exhaust the server's resources.
+
+```
+{
+    "content": {
+        "user": {
+            "user": <string>,
+            "metas": map<string>string
+            "run_id": <string>
+        },
+        "proxy_name": <string>
+    }
+}
+```
+
 #### Ping
 
 Heartbeat from frpc

doc/server_plugin_zh.md

@@ -1,228 +0,0 @@
-### 服务端管理插件
-
-frp 管理插件的作用是在不侵入自身代码的前提下，扩展 frp 服务端的能力。
-
-frp 管理插件会以单独进程的形式运行，并且监听在一个端口上，对外提供 RPC 接口，响应 frps 的请求。
-
-frps 在执行某些操作前，会根据配置向管理插件发送 RPC 请求，根据管理插件的响应来执行相应的操作。
-
-### RPC 请求
-
-管理插件接收到操作请求后，可以给出三种回应。
-
-* 拒绝操作，需要返回拒绝操作的原因。
-* 允许操作，不需要修改操作内容。
-* 允许操作，对操作请求进行修改后，返回修改后的内容。
-
-### 接口
-
-接口路径可以在 frps 配置中为每个插件单独配置，这里以 `/handler` 为例。
-
-Request
-
-```
-POST /handler
-{
-    "version": "0.1.0",
-    "op": "Login",
-    "content": {
-        ... // 具体的操作信息
-    }
-}
-
-请求 Header
-X-Frp-Reqid: 用于追踪请求
-```
-
-Response
-
-非 200 的返回都认为是请求异常。
-
-拒绝执行操作
-
-```
-{
-   "reject": true,
-   "reject_reason": "invalid user"
-}
-```
-
-允许且内容不需要变动
-
-```
-{
-    "reject": false,
-    "unchange": true
-}
-```
-
-允许且需要替换操作内容
-
-```
-{
-    "unchange": "false",
-    "content": {
-        ... // 替换后的操作信息，格式必须和请求时的一致
-    }
-}
-```
-
-### 操作类型
-
-目前插件支持管理的操作类型有 `Login`、`NewProxy`、`Ping`、`NewWorkConn` 和 `NewUserConn`。
-
-#### Login
-
-用户登录操作信息
-
-```
-{
-    "content": {
-        "version": <string>,
-        "hostname": <string>,
-        "os": <string>,
-        "arch": <string>,
-        "user": <string>,
-        "timestamp": <int64>,
-        "privilege_key": <string>,
-        "run_id": <string>,
-        "pool_count": <int>,
-        "metas": map<string>string
-    }
-}
-```
-
-#### NewProxy
-
-创建代理的相关信息
-
-```
-{
-    "content": {
-        "user": {
-            "user": <string>,
-            "metas": map<string>string
-        },
-        "proxy_name": <string>,
-        "proxy_type": <string>,
-        "use_encryption": <bool>,
-        "use_compression": <bool>,
-        "group": <string>,
-        "group_key": <string>,
-
-        // tcp and udp only
-        "remote_port": <int>,
-
-        // http and https only
-        "custom_domains": []<string>,
-        "subdomain": <string>,
-        "locations": <string>,
-        "http_user": <string>,
-        "http_pwd": <string>,
-        "host_header_rewrite": <string>,
-        "headers": map<string>string,
-
-        "metas": map<string>string
-    }
-}
-```
-
-#### Ping
-
-心跳相关信息
-
-```
-{
-    "content": {
-        "user": {
-            "user": <string>,
-            "metas": map<string>string
-            "run_id": <string>
-        },
-        "timestamp": <int64>,
-        "privilege_key": <string>
-    }
-}
-```
-
-#### NewWorkConn
-
-新增 `frpc` 连接相关信息
-
-```
-{
-    "content": {
-        "user": {
-            "user": <string>,
-            "metas": map<string>string
-            "run_id": <string>
-        },
-        "run_id": <string>
-        "timestamp": <int64>,
-        "privilege_key": <string>
-    }
-}
-```
-
-#### NewUserConn
-
-新增 `proxy` 连接相关信息 (支持 `tcp`、`stcp`、`https` 和 `tcpmux` 协议)。
-
-```
-{
-    "content": {
-        "user": {
-            "user": <string>,
-            "metas": map<string>string
-            "run_id": <string>
-        },
-        "proxy_name": <string>,
-        "proxy_type": <string>,
-        "remote_addr": <string>
-    }
-}
-```
-
-
-### frps 中插件配置
-
-```ini
-[common]
-bind_port = 7000
-
-[plugin.user-manager]
-addr = 127.0.0.1:9000
-path = /handler
-ops = Login
-
-[plugin.port-manager]
-addr = 127.0.0.1:9001
-path = /handler
-ops = NewProxy
-```
-
-addr: 插件监听的网络地址。
-path: 插件监听的 HTTP 请求路径。
-ops: 插件需要处理的操作列表，多个 op 以英文逗号分隔。
-
-### 元数据
-
-为了减少 frps 的代码修改，同时提高管理插件的扩展能力，在 frpc 的配置文件中引入自定义元数据的概念。元数据会在调用 RPC 请求时发送给插件。
-
-元数据以 `meta_` 开头，可以配置多个，元数据分为两种，一种配置在 `common` 下，一种配置在各个 proxy 中。
-
-```
-# frpc.ini
-[common]
-server_addr = 127.0.0.1
-server_port = 7000
-user = fake
-meta_token = fake
-meta_version = 1.0.0
-
-[ssh]
-type = tcp
-local_port = 22
-remote_port = 6000
-meta_id = 123
-```

dockerfiles/Dockerfile-for-frpc

@@ -1,11 +1,11 @@
-FROM alpine:3.12.0 AS temp
+FROM alpine:3 AS temp
 
 COPY bin/frpc /tmp
 
 RUN chmod -R 777 /tmp/frpc
 
 
-FROM alpine:3.12.0
+FROM alpine:3
 
 WORKDIR /app
 

dockerfiles/Dockerfile-for-frps

@@ -1,11 +1,11 @@
-FROM alpine:3.12.0 AS temp
+FROM alpine:3 AS temp
 
 COPY bin/frps /tmp
 
 RUN chmod -R 777 /tmp/frps
 
 
-FROM alpine:3.12.0
+FROM alpine:3
 
 WORKDIR /app
 

go.mod

@@ -6,35 +6,28 @@ require (
 	github.com/armon/go-socks5 v0.0.0-20160902184237-e75332964ef5
 	github.com/coreos/go-oidc v2.2.1+incompatible
 	github.com/fatedier/beego v0.0.0-20171024143340-6c6a4f5bd5eb
-	github.com/fatedier/golib v0.1.1-0.20200901083111-1f870741e185
+	github.com/fatedier/golib v0.1.1-0.20220321042308-c306138b83ac
 	github.com/fatedier/kcp-go v2.0.4-0.20190803094908-fe8645b0a904+incompatible
-	github.com/google/uuid v1.1.1
-	github.com/gorilla/mux v1.7.3
-	github.com/gorilla/websocket v1.4.0
-	github.com/hashicorp/yamux v0.0.0-20181012175058-2f1d1f20f75d
-	github.com/inconshreveable/mousetrap v1.0.0 // indirect
-	github.com/klauspost/cpuid v1.2.0 // indirect
-	github.com/klauspost/reedsolomon v1.9.1 // indirect
-	github.com/mattn/go-runewidth v0.0.4 // indirect
-	github.com/onsi/ginkgo v1.12.3
-	github.com/onsi/gomega v1.10.1
-	github.com/pires/go-proxyproto v0.0.0-20190111085350-4d51b51e3bfc
+	github.com/go-playground/validator/v10 v10.6.1
+	github.com/google/uuid v1.2.0
+	github.com/gorilla/mux v1.8.0
+	github.com/gorilla/websocket v1.4.2
+	github.com/hashicorp/yamux v0.0.0-20210707203944-259a57b3608c
+	github.com/leodido/go-urn v1.2.1 // indirect
+	github.com/onsi/ginkgo v1.16.4
+	github.com/onsi/gomega v1.13.0
+	github.com/pires/go-proxyproto v0.5.0
 	github.com/pquerna/cachecontrol v0.0.0-20180517163645-1555304b9b35 // indirect
-	github.com/prometheus/client_golang v1.4.1
-	github.com/rakyll/statik v0.1.1
-	github.com/rodaine/table v1.0.0
-	github.com/smartystreets/goconvey v1.6.4 // indirect
-	github.com/spf13/cobra v0.0.3
-	github.com/stretchr/testify v1.4.0
-	github.com/templexxx/cpufeat v0.0.0-20170927014610-3794dfbfb047 // indirect
-	github.com/templexxx/xor v0.0.0-20170926022130-0af8e873c554 // indirect
-	github.com/tjfoc/gmsm v0.0.0-20171124023159-98aa888b79d8 // indirect
-	github.com/xtaci/lossyconn v0.0.0-20190602105132-8df528c0c9ae // indirect
-	golang.org/x/net v0.0.0-20200520004742-59133d7f0dd7
+	github.com/prometheus/client_golang v1.11.0
+	github.com/rodaine/table v1.0.1
+	github.com/spf13/cobra v1.1.3
+	github.com/stretchr/testify v1.7.0
+	golang.org/x/net v0.0.0-20210428140749-89ef3d95e781
 	golang.org/x/oauth2 v0.0.0-20200107190931-bf48bf16ab8d
-	golang.org/x/sys v0.0.0-20200602225109-6fdc65e7d980 // indirect
-	golang.org/x/time v0.0.0-20191024005414-555d28b269f0
+	golang.org/x/sys v0.0.0-20210616094352-59db8d763f22 // indirect
+	golang.org/x/time v0.0.0-20210220033141-f8bda1e9f3ba
 	gopkg.in/ini.v1 v1.62.0
 	gopkg.in/square/go-jose.v2 v2.4.1 // indirect
-	k8s.io/apimachinery v0.18.3
+	k8s.io/apimachinery v0.21.2
+	k8s.io/client-go v0.21.2
 )

go.sum

@@ -1,269 +1,691 @@
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hack/run-e2e.sh

@@ -5,11 +5,16 @@ ROOT=$(unset CDPATH && cd $(dirname "${BASH_SOURCE[0]}")/.. && pwd)
 which ginkgo &> /dev/null
 if [ $? -ne 0 ]; then
     echo "ginkgo not found, try to install..."
-    go install github.com/onsi/ginkgo/ginkgo
+    go install github.com/onsi/ginkgo/ginkgo@latest
 fi
 
 debug=false
 if [ x${DEBUG} == x"true" ]; then
     debug=true
 fi
-ginkgo -nodes=4 ${ROOT}/test/e2e -- -frpc-path=${ROOT}/bin/frpc -frps-path=${ROOT}/bin/frps -log-level=debug -debug=${debug}
+logLevel=debug
+if [ x${LOG_LEVEL} != x"" ]; then
+    logLevel=${LOG_LEVEL}
+fi
+
+ginkgo -nodes=8 -slowSpecThreshold=20 ${ROOT}/test/e2e -- -frpc-path=${ROOT}/bin/frpc -frps-path=${ROOT}/bin/frps -log-level=${logLevel} -debug=${debug}

pkg/auth/oidc.go

@@ -40,14 +40,20 @@ type OidcClientConfig struct {
 	// It will be used to get an OIDC token if AuthenticationMethod == "oidc".
 	// By default, this value is "".
 	OidcTokenEndpointURL string `ini:"oidc_token_endpoint_url" json:"oidc_token_endpoint_url"`
+
+	// OidcAdditionalEndpointParams specifies additional parameters to be sent
+	// this field will be transfer to map[string][]string in OIDC token generator
+	// The field will be set by prefix "oidc_additional_"
+	OidcAdditionalEndpointParams map[string]string `ini:"-" json:"oidc_additional_endpoint_params"`
 }
 
 func getDefaultOidcClientConf() OidcClientConfig {
 	return OidcClientConfig{
-		OidcClientID:         "",
-		OidcClientSecret:     "",
-		OidcAudience:         "",
-		OidcTokenEndpointURL: "",
+		OidcClientID:                 "",
+		OidcClientSecret:             "",
+		OidcAudience:                 "",
+		OidcTokenEndpointURL:         "",
+		OidcAdditionalEndpointParams: make(map[string]string),
 	}
 }
 
@@ -88,11 +94,17 @@ type OidcAuthProvider struct {
 }
 
 func NewOidcAuthSetter(baseCfg BaseConfig, cfg OidcClientConfig) *OidcAuthProvider {
+	eps := make(map[string][]string)
+	for k, v := range cfg.OidcAdditionalEndpointParams {
+		eps[k] = []string{v}
+	}
+
 	tokenGenerator := &clientcredentials.Config{
-		ClientID:     cfg.OidcClientID,
-		ClientSecret: cfg.OidcClientSecret,
-		Scopes:       []string{cfg.OidcAudience},
-		TokenURL:     cfg.OidcTokenEndpointURL,
+		ClientID:       cfg.OidcClientID,
+		ClientSecret:   cfg.OidcClientSecret,
+		Scopes:         []string{cfg.OidcAudience},
+		TokenURL:       cfg.OidcTokenEndpointURL,
+		EndpointParams: eps,
 	}
 
 	return &OidcAuthProvider{

pkg/config/client.go

@@ -17,6 +17,7 @@ package config
 import (
 	"fmt"
 	"os"
+	"path/filepath"
 	"strings"
 
 	"github.com/fatedier/frp/pkg/auth"
@@ -33,10 +34,19 @@ type ClientCommonConf struct {
 
 	// ServerAddr specifies the address of the server to connect to. By
 	// default, this value is "0.0.0.0".
-	ServerAddr string `ini:"server_addr" josn:"server_addr"`
+	ServerAddr string `ini:"server_addr" json:"server_addr"`
 	// ServerPort specifies the port to connect to the server on. By default,
 	// this value is 7000.
 	ServerPort int `ini:"server_port" json:"server_port"`
+	// The maximum amount of time a dial to server will wait for a connect to complete.
+	DialServerTimeout int64 `ini:"dial_server_timeout" json:"dial_server_timeout"`
+	// DialServerKeepAlive specifies the interval between keep-alive probes for an active network connection between frpc and frps.
+	// If negative, keep-alive probes are disabled.
+	DialServerKeepAlive int64 `ini:"dial_server_keepalive" json:"dial_server_keepalive"`
+	// ConnectServerLocalIP specifies the address of the client bind when it connect to server.
+	// By default, this value is empty.
+	// this value only use in TCP/Websocket protocol. Not support in KCP protocol.
+	ConnectServerLocalIP string `ini:"connect_server_local_ip" json:"connect_server_local_ip"`
 	// HTTPProxy specifies a proxy address to connect to the server through. If
 	// this value is "", the server will be connected to directly. By default,
 	// this value is read from the "http_proxy" environment variable.
@@ -68,10 +78,10 @@ type ClientCommonConf struct {
 	// is 0.
 	AdminPort int `ini:"admin_port" json:"admin_port"`
 	// AdminUser specifies the username that the admin server will use for
-	// login. By default, this value is "admin".
+	// login.
 	AdminUser string `ini:"admin_user" json:"admin_user"`
 	// AdminPwd specifies the password that the admin server will use for
-	// login. By default, this value is "admin".
+	// login.
 	AdminPwd string `ini:"admin_pwd" json:"admin_pwd"`
 	// AssetsDir specifies the local directory that the admin server will load
 	// resources from. If this value is "", assets will be loaded from the
@@ -85,6 +95,9 @@ type ClientCommonConf struct {
 	// the server must have TCP multiplexing enabled as well. By default, this
 	// value is true.
 	TCPMux bool `ini:"tcp_mux" json:"tcp_mux"`
+	// TCPMuxKeepaliveInterval specifies the keep alive interval for TCP stream multipler.
+	// If TCPMux is true, heartbeat of application layer is unnecessary because it can only rely on heartbeat in TCPMux.
+	TCPMuxKeepaliveInterval int64 `ini:"tcp_mux_keepalive_interval" json:"tcp_mux_keepalive_interval"`
 	// User specifies a prefix for proxy names to distinguish them from other
 	// clients. If this value is not "", proxy names will automatically be
 	// changed to "{user}.{proxy_name}". By default, this value is "".
@@ -123,53 +136,66 @@ type ClientCommonConf struct {
 	// TLSServerName specifices the custom server name of tls certificate. By
 	// default, server name if same to ServerAddr.
 	TLSServerName string `ini:"tls_server_name" json:"tls_server_name"`
+	// By default, frpc will connect frps with first custom byte if tls is enabled.
+	// If DisableCustomTLSFirstByte is true, frpc will not send that custom byte.
+	DisableCustomTLSFirstByte bool `ini:"disable_custom_tls_first_byte" json:"disable_custom_tls_first_byte"`
 	// HeartBeatInterval specifies at what interval heartbeats are sent to the
 	// server, in seconds. It is not recommended to change this value. By
-	// default, this value is 30.
+	// default, this value is 30. Set negative value to disable it.
 	HeartbeatInterval int64 `ini:"heartbeat_interval" json:"heartbeat_interval"`
 	// HeartBeatTimeout specifies the maximum allowed heartbeat response delay
 	// before the connection is terminated, in seconds. It is not recommended
-	// to change this value. By default, this value is 90.
+	// to change this value. By default, this value is 90. Set negative value to disable it.
 	HeartbeatTimeout int64 `ini:"heartbeat_timeout" json:"heartbeat_timeout"`
 	// Client meta info
 	Metas map[string]string `ini:"-" json:"metas"`
 	// UDPPacketSize specifies the udp packet size
 	// By default, this value is 1500
 	UDPPacketSize int64 `ini:"udp_packet_size" json:"udp_packet_size"`
+	// Include other config files for proxies.
+	IncludeConfigFiles []string `ini:"includes" json:"includes"`
+	// Enable golang pprof handlers in admin listener.
+	// Admin port must be set first.
+	PprofEnable bool `ini:"pprof_enable" json:"pprof_enable"`
 }
 
 // GetDefaultClientConf returns a client configuration with default values.
 func GetDefaultClientConf() ClientCommonConf {
 	return ClientCommonConf{
-		ClientConfig:      auth.GetDefaultClientConf(),
-		ServerAddr:        "0.0.0.0",
-		ServerPort:        7000,
-		HTTPProxy:         os.Getenv("http_proxy"),
-		LogFile:           "console",
-		LogWay:            "console",
-		LogLevel:          "info",
-		LogMaxDays:        3,
-		DisableLogColor:   false,
-		AdminAddr:         "127.0.0.1",
-		AdminPort:         0,
-		AdminUser:         "",
-		AdminPwd:          "",
-		AssetsDir:         "",
-		PoolCount:         1,
-		TCPMux:            true,
-		User:              "",
-		DNSServer:         "",
-		LoginFailExit:     true,
-		Start:             make([]string, 0),
-		Protocol:          "tcp",
-		TLSEnable:         false,
-		TLSCertFile:       "",
-		TLSKeyFile:        "",
-		TLSTrustedCaFile:  "",
-		HeartbeatInterval: 30,
-		HeartbeatTimeout:  90,
-		Metas:             make(map[string]string),
-		UDPPacketSize:     1500,
+		ClientConfig:            auth.GetDefaultClientConf(),
+		ServerAddr:              "0.0.0.0",
+		ServerPort:              7000,
+		DialServerTimeout:       10,
+		DialServerKeepAlive:     7200,
+		HTTPProxy:               os.Getenv("http_proxy"),
+		LogFile:                 "console",
+		LogWay:                  "console",
+		LogLevel:                "info",
+		LogMaxDays:              3,
+		DisableLogColor:         false,
+		AdminAddr:               "127.0.0.1",
+		AdminPort:               0,
+		AdminUser:               "",
+		AdminPwd:                "",
+		AssetsDir:               "",
+		PoolCount:               1,
+		TCPMux:                  true,
+		TCPMuxKeepaliveInterval: 60,
+		User:                    "",
+		DNSServer:               "",
+		LoginFailExit:           true,
+		Start:                   make([]string, 0),
+		Protocol:                "tcp",
+		TLSEnable:               false,
+		TLSCertFile:             "",
+		TLSKeyFile:              "",
+		TLSTrustedCaFile:        "",
+		HeartbeatInterval:       30,
+		HeartbeatTimeout:        90,
+		Metas:                   make(map[string]string),
+		UDPPacketSize:           1500,
+		IncludeConfigFiles:      make([]string, 0),
+		PprofEnable:             false,
 	}
 }
 
@@ -182,12 +208,10 @@ func (cfg *ClientCommonConf) Complete() {
 }
 
 func (cfg *ClientCommonConf) Validate() error {
-	if cfg.HeartbeatInterval <= 0 {
-		return fmt.Errorf("invalid heartbeat_interval")
-	}
-
-	if cfg.HeartbeatTimeout < cfg.HeartbeatInterval {
-		return fmt.Errorf("invalid heartbeat_timeout, heartbeat_timeout is less than heartbeat_interval")
+	if cfg.HeartbeatTimeout > 0 && cfg.HeartbeatInterval > 0 {
+		if cfg.HeartbeatTimeout < cfg.HeartbeatInterval {
+			return fmt.Errorf("invalid heartbeat_timeout, heartbeat_timeout is less than heartbeat_interval")
+		}
 	}
 
 	if cfg.TLSEnable == false {
@@ -208,6 +232,15 @@ func (cfg *ClientCommonConf) Validate() error {
 		return fmt.Errorf("invalid protocol")
 	}
 
+	for _, f := range cfg.IncludeConfigFiles {
+		absDir, err := filepath.Abs(filepath.Dir(f))
+		if err != nil {
+			return fmt.Errorf("include: parse directory of %s failed: %v", f, absDir)
+		}
+		if _, err := os.Stat(absDir); os.IsNotExist(err) {
+			return fmt.Errorf("include: directory of %s not exist", f)
+		}
+	}
 	return nil
 }
 
@@ -236,6 +269,7 @@ func UnmarshalClientConfFromIni(source interface{}) (ClientCommonConf, error) {
 	}
 
 	common.Metas = GetMapWithoutPrefix(s.KeysHash(), "meta_")
+	common.ClientConfig.OidcAdditionalEndpointParams = GetMapWithoutPrefix(s.KeysHash(), "oidc_additional_")
 
 	return common, nil
 }
@@ -290,7 +324,7 @@ func LoadAllProxyConfsFromIni(
 	for _, section := range rangeSections {
 		err = renderRangeProxyTemplates(f, section)
 		if err != nil {
-			return nil, nil, fmt.Errorf("fail to render range-section[%s] with error: %v", section.Name(), err)
+			return nil, nil, fmt.Errorf("failed to render template for proxy %s: %v", section.Name(), err)
 		}
 	}
 
@@ -315,7 +349,7 @@ func LoadAllProxyConfsFromIni(
 		case "server":
 			newConf, newErr := NewProxyConfFromIni(prefix, name, section)
 			if newErr != nil {
-				return nil, nil, fmt.Errorf("fail to parse section[%s], err: %v", name, newErr)
+				return nil, nil, fmt.Errorf("failed to parse proxy %s, err: %v", name, newErr)
 			}
 			proxyConfs[prefix+name] = newConf
 		case "visitor":
@@ -325,7 +359,7 @@ func LoadAllProxyConfsFromIni(
 			}
 			visitorConfs[prefix+name] = newConf
 		default:
-			return nil, nil, fmt.Errorf("section[%s] role should be 'server' or 'visitor'", name)
+			return nil, nil, fmt.Errorf("proxy %s role should be 'server' or 'visitor'", name)
 		}
 	}
 	return proxyConfs, visitorConfs, nil

pkg/config/client_test.go

@@ -259,43 +259,47 @@ func Test_LoadClientCommonConf(t *testing.T) {
 				OidcTokenEndpointURL: "endpoint_url",
 			},
 		},
-		ServerAddr:        "0.0.0.9",
-		ServerPort:        7009,
-		HTTPProxy:         "http://user:passwd@192.168.1.128:8080",
-		LogFile:           "./frpc.log9",
-		LogWay:            "file",
-		LogLevel:          "info9",
-		LogMaxDays:        39,
-		DisableLogColor:   false,
-		AdminAddr:         "127.0.0.9",
-		AdminPort:         7409,
-		AdminUser:         "admin9",
-		AdminPwd:          "admin9",
-		AssetsDir:         "./static9",
-		PoolCount:         59,
-		TCPMux:            true,
-		User:              "your_name",
-		LoginFailExit:     true,
-		Protocol:          "tcp",
-		TLSEnable:         true,
-		TLSCertFile:       "client.crt",
-		TLSKeyFile:        "client.key",
-		TLSTrustedCaFile:  "ca.crt",
-		TLSServerName:     "example.com",
-		DNSServer:         "8.8.8.9",
-		Start:             []string{"ssh", "dns"},
-		HeartbeatInterval: 39,
-		HeartbeatTimeout:  99,
+		ServerAddr:              "0.0.0.9",
+		ServerPort:              7009,
+		DialServerTimeout:       10,
+		DialServerKeepAlive:     7200,
+		HTTPProxy:               "http://user:passwd@192.168.1.128:8080",
+		LogFile:                 "./frpc.log9",
+		LogWay:                  "file",
+		LogLevel:                "info9",
+		LogMaxDays:              39,
+		DisableLogColor:         false,
+		AdminAddr:               "127.0.0.9",
+		AdminPort:               7409,
+		AdminUser:               "admin9",
+		AdminPwd:                "admin9",
+		AssetsDir:               "./static9",
+		PoolCount:               59,
+		TCPMux:                  true,
+		TCPMuxKeepaliveInterval: 60,
+		User:                    "your_name",
+		LoginFailExit:           true,
+		Protocol:                "tcp",
+		TLSEnable:               true,
+		TLSCertFile:             "client.crt",
+		TLSKeyFile:              "client.key",
+		TLSTrustedCaFile:        "ca.crt",
+		TLSServerName:           "example.com",
+		DNSServer:               "8.8.8.9",
+		Start:                   []string{"ssh", "dns"},
+		HeartbeatInterval:       39,
+		HeartbeatTimeout:        99,
 		Metas: map[string]string{
 			"var1": "123",
 			"var2": "234",
 		},
-		UDPPacketSize: 1509,
+		UDPPacketSize:      1509,
+		IncludeConfigFiles: []string{},
 	}
 
 	common, err := UnmarshalClientConfFromIni(testClientBytesWithFull)
 	assert.NoError(err)
-	assert.Equal(expected, common)
+	assert.EqualValues(expected, common)
 }
 
 func Test_LoadClientBasicConf(t *testing.T) {
@@ -641,5 +645,4 @@ func Test_LoadClientBasicConf(t *testing.T) {
 	assert.NoError(err)
 	assert.Equal(proxyExpected, proxyActual)
 	assert.Equal(visitorExpected, visitorActual)
-
 }

pkg/config/parse.go

@@ -0,0 +1,99 @@
+// Copyright 2021 The frp Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package config
+
+import (
+	"bytes"
+	"fmt"
+	"os"
+	"path/filepath"
+)
+
+func ParseClientConfig(filePath string) (
+	cfg ClientCommonConf,
+	pxyCfgs map[string]ProxyConf,
+	visitorCfgs map[string]VisitorConf,
+	err error,
+) {
+	var content []byte
+	content, err = GetRenderedConfFromFile(filePath)
+	if err != nil {
+		return
+	}
+	configBuffer := bytes.NewBuffer(nil)
+	configBuffer.Write(content)
+
+	// Parse common section.
+	cfg, err = UnmarshalClientConfFromIni(content)
+	if err != nil {
+		return
+	}
+	cfg.Complete()
+	if err = cfg.Validate(); err != nil {
+		err = fmt.Errorf("Parse config error: %v", err)
+		return
+	}
+
+	// Aggregate proxy configs from include files.
+	var buf []byte
+	buf, err = getIncludeContents(cfg.IncludeConfigFiles)
+	if err != nil {
+		err = fmt.Errorf("getIncludeContents error: %v", err)
+		return
+	}
+	configBuffer.WriteString("\n")
+	configBuffer.Write(buf)
+
+	// Parse all proxy and visitor configs.
+	pxyCfgs, visitorCfgs, err = LoadAllProxyConfsFromIni(cfg.User, configBuffer.Bytes(), cfg.Start)
+	if err != nil {
+		return
+	}
+	return
+}
+
+// getIncludeContents renders all configs from paths.
+// files format can be a single file path or directory or regex path.
+func getIncludeContents(paths []string) ([]byte, error) {
+	out := bytes.NewBuffer(nil)
+	for _, path := range paths {
+		absDir, err := filepath.Abs(filepath.Dir(path))
+		if err != nil {
+			return nil, err
+		}
+		if _, err := os.Stat(absDir); os.IsNotExist(err) {
+			return nil, err
+		}
+		files, err := os.ReadDir(absDir)
+		if err != nil {
+			return nil, err
+		}
+		for _, fi := range files {
+			if fi.IsDir() {
+				continue
+			}
+			absFile := filepath.Join(absDir, fi.Name())
+			if matched, _ := filepath.Match(filepath.Join(absDir, filepath.Base(path)), absFile); matched {
+				tmpContent, err := GetRenderedConfFromFile(absFile)
+				if err != nil {
+					return nil, fmt.Errorf("render extra config %s error: %v", absFile, err)
+				}
+				out.Write(tmpContent)
+				out.WriteString("\n")
+			}
+		}
+	}
+	return out.Bytes(), nil
+}

pkg/config/proxy.go

@@ -143,7 +143,6 @@ type BaseProxyConf struct {
 	// meta info for each proxy
 	Metas map[string]string `ini:"-" json:"metas"`
 
-	// TODO: LocalSvrConf => LocalAppConf
 	LocalSvrConf    `ini:",extends"`
 	HealthCheckConf `ini:",extends"`
 }
@@ -274,7 +273,7 @@ func NewProxyConfFromIni(prefix, name string, section *ini.Section) (ProxyConf,
 
 	conf := DefaultProxyConf(proxyType)
 	if conf == nil {
-		return nil, fmt.Errorf("proxy [%s] type [%s] error", name, proxyType)
+		return nil, fmt.Errorf("proxy %s has invalid type [%s]", name, proxyType)
 	}
 
 	if err := conf.UnmarshalFromIni(prefix, name, section); err != nil {

pkg/config/server.go

@@ -22,6 +22,7 @@ import (
 	plugin "github.com/fatedier/frp/pkg/plugin/server"
 	"github.com/fatedier/frp/pkg/util/util"
 
+	"github.com/go-playground/validator/v10"
 	"gopkg.in/ini.v1"
 )
 
@@ -36,31 +37,31 @@ type ServerCommonConf struct {
 	BindAddr string `ini:"bind_addr" json:"bind_addr"`
 	// BindPort specifies the port that the server listens on. By default, this
 	// value is 7000.
-	BindPort int `ini:"bind_port" json:"bind_port"`
+	BindPort int `ini:"bind_port" json:"bind_port" validate:"gte=0,lte=65535"`
 	// BindUDPPort specifies the UDP port that the server listens on. If this
 	// value is 0, the server will not listen for UDP connections. By default,
 	// this value is 0
-	BindUDPPort int `ini:"bind_udp_port" json:"bind_udp_port"`
+	BindUDPPort int `ini:"bind_udp_port" json:"bind_udp_port" validate:"gte=0,lte=65535"`
 	// KCPBindPort specifies the KCP port that the server listens on. If this
 	// value is 0, the server will not listen for KCP connections. By default,
 	// this value is 0.
-	KCPBindPort int `ini:"kcp_bind_port" json:"kcp_bind_port"`
+	KCPBindPort int `ini:"kcp_bind_port" json:"kcp_bind_port" validate:"gte=0,lte=65535"`
 	// ProxyBindAddr specifies the address that the proxy binds to. This value
 	// may be the same as BindAddr.
 	ProxyBindAddr string `ini:"proxy_bind_addr" json:"proxy_bind_addr"`
 	// VhostHTTPPort specifies the port that the server listens for HTTP Vhost
 	// requests. If this value is 0, the server will not listen for HTTP
 	// requests. By default, this value is 0.
-	VhostHTTPPort int `ini:"vhost_http_port" json:"vhost_http_port"`
+	VhostHTTPPort int `ini:"vhost_http_port" json:"vhost_http_port" validate:"gte=0,lte=65535"`
 	// VhostHTTPSPort specifies the port that the server listens for HTTPS
 	// Vhost requests. If this value is 0, the server will not listen for HTTPS
 	// requests. By default, this value is 0.
-	VhostHTTPSPort int `ini:"vhost_https_port" json:"vhost_https_port"`
+	VhostHTTPSPort int `ini:"vhost_https_port" json:"vhost_https_port" validate:"gte=0,lte=65535"`
 	// TCPMuxHTTPConnectPort specifies the port that the server listens for TCP
 	// HTTP CONNECT requests. If the value is 0, the server will not multiplex TCP
 	// requests on one single port. If it's not - it will listen on this value for
 	// HTTP CONNECT requests. By default, this value is 0.
-	TCPMuxHTTPConnectPort int `ini:"tcpmux_httpconnect_port" json:"tcpmux_httpconnect_port"`
+	TCPMuxHTTPConnectPort int `ini:"tcpmux_httpconnect_port" json:"tcpmux_httpconnect_port" validate:"gte=0,lte=65535"`
 	// VhostHTTPTimeout specifies the response header timeout for the Vhost
 	// HTTP server, in seconds. By default, this value is 60.
 	VhostHTTPTimeout int64 `ini:"vhost_http_timeout" json:"vhost_http_timeout"`
@@ -70,12 +71,12 @@ type ServerCommonConf struct {
 	// DashboardPort specifies the port that the dashboard listens on. If this
 	// value is 0, the dashboard will not be started. By default, this value is
 	// 0.
-	DashboardPort int `ini:"dashboard_port" json:"dashboard_port"`
+	DashboardPort int `ini:"dashboard_port" json:"dashboard_port" validate:"gte=0,lte=65535"`
 	// DashboardUser specifies the username that the dashboard will use for
-	// login. By default, this value is "admin".
+	// login.
 	DashboardUser string `ini:"dashboard_user" json:"dashboard_user"`
-	// DashboardUser specifies the password that the dashboard will use for
-	// login. By default, this value is "admin".
+	// DashboardPwd specifies the password that the dashboard will use for
+	// login.
 	DashboardPwd string `ini:"dashboard_pwd" json:"dashboard_pwd"`
 	// EnablePrometheus will export prometheus metrics on {dashboard_addr}:{dashboard_port}
 	// in /metrics api.
@@ -117,6 +118,12 @@ type ServerCommonConf struct {
 	// from a client to share a single TCP connection. By default, this value
 	// is true.
 	TCPMux bool `ini:"tcp_mux" json:"tcp_mux"`
+	// TCPMuxKeepaliveInterval specifies the keep alive interval for TCP stream multipler.
+	// If TCPMux is true, heartbeat of application layer is unnecessary because it can only rely on heartbeat in TCPMux.
+	TCPMuxKeepaliveInterval int64 `ini:"tcp_mux_keepalive_interval" json:"tcp_mux_keepalive_interval"`
+	// TCPKeepAlive specifies the interval between keep-alive probes for an active network connection between frpc and frps.
+	// If negative, keep-alive probes are disabled.
+	TCPKeepAlive int64 `ini:"tcp_keepalive" json:"tcp_keepalive"`
 	// Custom404Page specifies a path to a custom 404 page to display. If this
 	// value is "", a default page will be displayed. By default, this value is
 	// "".
@@ -153,7 +160,7 @@ type ServerCommonConf struct {
 	TLSTrustedCaFile string `ini:"tls_trusted_ca_file" json:"tls_trusted_ca_file"`
 	// HeartBeatTimeout specifies the maximum time to wait for a heartbeat
 	// before terminating the connection. It is not recommended to change this
-	// value. By default, this value is 90.
+	// value. By default, this value is 90. Set negative value to disable it.
 	HeartbeatTimeout int64 `ini:"heartbeat_timeout" json:"heartbeat_timeout"`
 	// UserConnTimeout specifies the maximum time to wait for a work
 	// connection. By default, this value is 10.
@@ -163,48 +170,54 @@ type ServerCommonConf struct {
 	// UDPPacketSize specifies the UDP packet size
 	// By default, this value is 1500
 	UDPPacketSize int64 `ini:"udp_packet_size" json:"udp_packet_size"`
+	// Enable golang pprof handlers in dashboard listener.
+	// Dashboard port must be set first.
+	PprofEnable bool `ini:"pprof_enable" json:"pprof_enable"`
 }
 
 // GetDefaultServerConf returns a server configuration with reasonable
 // defaults.
 func GetDefaultServerConf() ServerCommonConf {
 	return ServerCommonConf{
-		ServerConfig:           auth.GetDefaultServerConf(),
-		BindAddr:               "0.0.0.0",
-		BindPort:               7000,
-		BindUDPPort:            0,
-		KCPBindPort:            0,
-		ProxyBindAddr:          "",
-		VhostHTTPPort:          0,
-		VhostHTTPSPort:         0,
-		TCPMuxHTTPConnectPort:  0,
-		VhostHTTPTimeout:       60,
-		DashboardAddr:          "0.0.0.0",
-		DashboardPort:          0,
-		DashboardUser:          "admin",
-		DashboardPwd:           "admin",
-		EnablePrometheus:       false,
-		AssetsDir:              "",
-		LogFile:                "console",
-		LogWay:                 "console",
-		LogLevel:               "info",
-		LogMaxDays:             3,
-		DisableLogColor:        false,
-		DetailedErrorsToClient: true,
-		SubDomainHost:          "",
-		TCPMux:                 true,
-		AllowPorts:             make(map[int]struct{}),
-		MaxPoolCount:           5,
-		MaxPortsPerClient:      0,
-		TLSOnly:                false,
-		TLSCertFile:            "",
-		TLSKeyFile:             "",
-		TLSTrustedCaFile:       "",
-		HeartbeatTimeout:       90,
-		UserConnTimeout:        10,
-		Custom404Page:          "",
-		HTTPPlugins:            make(map[string]plugin.HTTPPluginOptions),
-		UDPPacketSize:          1500,
+		ServerConfig:            auth.GetDefaultServerConf(),
+		BindAddr:                "0.0.0.0",
+		BindPort:                7000,
+		BindUDPPort:             0,
+		KCPBindPort:             0,
+		ProxyBindAddr:           "",
+		VhostHTTPPort:           0,
+		VhostHTTPSPort:          0,
+		TCPMuxHTTPConnectPort:   0,
+		VhostHTTPTimeout:        60,
+		DashboardAddr:           "0.0.0.0",
+		DashboardPort:           0,
+		DashboardUser:           "",
+		DashboardPwd:            "",
+		EnablePrometheus:        false,
+		AssetsDir:               "",
+		LogFile:                 "console",
+		LogWay:                  "console",
+		LogLevel:                "info",
+		LogMaxDays:              3,
+		DisableLogColor:         false,
+		DetailedErrorsToClient:  true,
+		SubDomainHost:           "",
+		TCPMux:                  true,
+		TCPMuxKeepaliveInterval: 60,
+		TCPKeepAlive:            7200,
+		AllowPorts:              make(map[int]struct{}),
+		MaxPoolCount:            5,
+		MaxPortsPerClient:       0,
+		TLSOnly:                 false,
+		TLSCertFile:             "",
+		TLSKeyFile:              "",
+		TLSTrustedCaFile:        "",
+		HeartbeatTimeout:        90,
+		UserConnTimeout:         10,
+		Custom404Page:           "",
+		HTTPPlugins:             make(map[string]plugin.HTTPPluginOptions),
+		UDPPacketSize:           1500,
+		PprofEnable:             false,
 	}
 }
 
@@ -223,7 +236,6 @@ func UnmarshalServerConfFromIni(source interface{}) (ServerCommonConf, error) {
 
 	s, err := f.GetSection("common")
 	if err != nil {
-		// TODO: add error info
 		return ServerCommonConf{}, err
 	}
 
@@ -282,7 +294,7 @@ func (cfg *ServerCommonConf) Complete() {
 }
 
 func (cfg *ServerCommonConf) Validate() error {
-	return nil
+	return validator.New().Struct(cfg)
 }
 
 func loadHTTPPluginOpt(section *ini.Section) (*plugin.HTTPPluginOptions, error) {

pkg/config/server_test.go

@@ -131,15 +131,17 @@ func Test_LoadServerCommonConf(t *testing.T) {
 					12: struct{}{},
 					99: struct{}{},
 				},
-				MaxPoolCount:      59,
-				MaxPortsPerClient: 9,
-				TLSOnly:           true,
-				TLSCertFile:       "server.crt",
-				TLSKeyFile:        "server.key",
-				TLSTrustedCaFile:  "ca.crt",
-				SubDomainHost:     "frps.com",
-				TCPMux:            true,
-				UDPPacketSize:     1509,
+				MaxPoolCount:            59,
+				MaxPortsPerClient:       9,
+				TLSOnly:                 true,
+				TLSCertFile:             "server.crt",
+				TLSKeyFile:              "server.key",
+				TLSTrustedCaFile:        "ca.crt",
+				SubDomainHost:           "frps.com",
+				TCPMux:                  true,
+				TCPMuxKeepaliveInterval: 60,
+				TCPKeepAlive:            7200,
+				UDPPacketSize:           1509,
 
 				HTTPPlugins: map[string]plugin.HTTPPluginOptions{
 					"user-manager": {
@@ -174,27 +176,29 @@ func Test_LoadServerCommonConf(t *testing.T) {
 						AuthenticateNewWorkConns: false,
 					},
 				},
-				BindAddr:               "0.0.0.9",
-				BindPort:               7009,
-				BindUDPPort:            7008,
-				ProxyBindAddr:          "0.0.0.9",
-				VhostHTTPTimeout:       60,
-				DashboardAddr:          "0.0.0.0",
-				DashboardUser:          "admin",
-				DashboardPwd:           "admin",
-				EnablePrometheus:       false,
-				LogFile:                "console",
-				LogWay:                 "console",
-				LogLevel:               "info",
-				LogMaxDays:             3,
-				DetailedErrorsToClient: true,
-				TCPMux:                 true,
-				AllowPorts:             make(map[int]struct{}),
-				MaxPoolCount:           5,
-				HeartbeatTimeout:       90,
-				UserConnTimeout:        10,
-				HTTPPlugins:            make(map[string]plugin.HTTPPluginOptions),
-				UDPPacketSize:          1500,
+				BindAddr:                "0.0.0.9",
+				BindPort:                7009,
+				BindUDPPort:             7008,
+				ProxyBindAddr:           "0.0.0.9",
+				VhostHTTPTimeout:        60,
+				DashboardAddr:           "0.0.0.0",
+				DashboardUser:           "",
+				DashboardPwd:            "",
+				EnablePrometheus:        false,
+				LogFile:                 "console",
+				LogWay:                  "console",
+				LogLevel:                "info",
+				LogMaxDays:              3,
+				DetailedErrorsToClient:  true,
+				TCPMux:                  true,
+				TCPMuxKeepaliveInterval: 60,
+				TCPKeepAlive:            7200,
+				AllowPorts:              make(map[int]struct{}),
+				MaxPoolCount:            5,
+				HeartbeatTimeout:        90,
+				UserConnTimeout:         10,
+				HTTPPlugins:             make(map[string]plugin.HTTPPluginOptions),
+				UDPPacketSize:           1500,
 			},
 		},
 	}

pkg/config/value.go

@@ -16,7 +16,6 @@ package config
 
 import (
 	"bytes"
-	"io/ioutil"
 	"os"
 	"strings"
 	"text/template"
@@ -67,7 +66,7 @@ func RenderContent(in []byte) (out []byte, err error) {
 
 func GetRenderedConfFromFile(path string) (out []byte, err error) {
 	var b []byte
-	b, err = ioutil.ReadFile(path)
+	b, err = os.ReadFile(path)
 	if err != nil {
 		return
 	}

pkg/plugin/client/http2https.go

@@ -60,7 +60,7 @@ func NewHTTP2HTTPSPlugin(params map[string]string) (Plugin, error) {
 
 	listener := NewProxyListener()
 
-	p := &HTTPS2HTTPPlugin{
+	p := &HTTP2HTTPSPlugin{
 		localAddr:         localAddr,
 		hostHeaderRewrite: hostHeaderRewrite,
 		headers:           headers,

pkg/plugin/client/socks5.go

@@ -16,7 +16,6 @@ package plugin
 
 import (
 	"io"
-	"io/ioutil"
 	"log"
 	"net"
 
@@ -43,7 +42,7 @@ func NewSocks5Plugin(params map[string]string) (p Plugin, err error) {
 	passwd := params["plugin_passwd"]
 
 	cfg := &gosocks5.Config{
-		Logger: log.New(ioutil.Discard, "", log.LstdFlags),
+		Logger: log.New(io.Discard, "", log.LstdFlags),
 	}
 	if user != "" || passwd != "" {
 		cfg.Credentials = gosocks5.StaticCredentials(map[string]string{user: passwd})

pkg/plugin/server/http.go

@@ -20,7 +20,7 @@ import (
 	"crypto/tls"
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net/http"
 	"net/url"
 	"reflect"
@@ -116,7 +116,7 @@ func (p *httpPlugin) do(ctx context.Context, r *Request, res *Response) error {
 	if resp.StatusCode != http.StatusOK {
 		return fmt.Errorf("do http request error code: %d", resp.StatusCode)
 	}
-	buf, err = ioutil.ReadAll(resp.Body)
+	buf, err = io.ReadAll(resp.Body)
 	if err != nil {
 		return err
 	}

pkg/plugin/server/manager.go

@@ -18,6 +18,7 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"strings"
 
 	"github.com/fatedier/frp/pkg/util/util"
 	"github.com/fatedier/frp/pkg/util/xlog"
@@ -26,6 +27,7 @@ import (
 type Manager struct {
 	loginPlugins       []Plugin
 	newProxyPlugins    []Plugin
+	closeProxyPlugins  []Plugin
 	pingPlugins        []Plugin
 	newWorkConnPlugins []Plugin
 	newUserConnPlugins []Plugin
@@ -35,6 +37,7 @@ func NewManager() *Manager {
 	return &Manager{
 		loginPlugins:       make([]Plugin, 0),
 		newProxyPlugins:    make([]Plugin, 0),
+		closeProxyPlugins:  make([]Plugin, 0),
 		pingPlugins:        make([]Plugin, 0),
 		newWorkConnPlugins: make([]Plugin, 0),
 		newUserConnPlugins: make([]Plugin, 0),
@@ -48,6 +51,9 @@ func (m *Manager) Register(p Plugin) {
 	if p.IsSupport(OpNewProxy) {
 		m.newProxyPlugins = append(m.newProxyPlugins, p)
 	}
+	if p.IsSupport(OpCloseProxy) {
+		m.closeProxyPlugins = append(m.closeProxyPlugins, p)
+	}
 	if p.IsSupport(OpPing) {
 		m.pingPlugins = append(m.pingPlugins, p)
 	}
@@ -127,6 +133,32 @@ func (m *Manager) NewProxy(content *NewProxyContent) (*NewProxyContent, error) {
 	return content, nil
 }
 
+func (m *Manager) CloseProxy(content *CloseProxyContent) error {
+	if len(m.closeProxyPlugins) == 0 {
+		return nil
+	}
+
+	errs := make([]string, 0)
+	reqid, _ := util.RandID()
+	xl := xlog.New().AppendPrefix("reqid: " + reqid)
+	ctx := xlog.NewContext(context.Background(), xl)
+	ctx = NewReqidContext(ctx, reqid)
+
+	for _, p := range m.closeProxyPlugins {
+		_, _, err := p.Handle(ctx, OpCloseProxy, *content)
+		if err != nil {
+			xl.Warn("send CloseProxy request to plugin [%s] error: %v", p.Name(), err)
+			errs = append(errs, fmt.Sprintf("[%s]: %v", p.Name(), err))
+		}
+	}
+
+	if len(errs) > 0 {
+		return fmt.Errorf("send CloseProxy request to plugin errors: %s", strings.Join(errs, "; "))
+	} else {
+		return nil
+	}
+}
+
 func (m *Manager) Ping(content *PingContent) (*PingContent, error) {
 	if len(m.pingPlugins) == 0 {
 		return content, nil
@@ -179,7 +211,7 @@ func (m *Manager) NewWorkConn(content *NewWorkConnContent) (*NewWorkConnContent,
 	ctx := xlog.NewContext(context.Background(), xl)
 	ctx = NewReqidContext(ctx, reqid)
 
-	for _, p := range m.pingPlugins {
+	for _, p := range m.newWorkConnPlugins {
 		res, retContent, err = p.Handle(ctx, OpPing, *content)
 		if err != nil {
 			xl.Warn("send NewWorkConn request to plugin [%s] error: %v", p.Name(), err)

pkg/plugin/server/plugin.go

@@ -23,6 +23,7 @@ const (
 
 	OpLogin       = "Login"
 	OpNewProxy    = "NewProxy"
+	OpCloseProxy  = "CloseProxy"
 	OpPing        = "Ping"
 	OpNewWorkConn = "NewWorkConn"
 	OpNewUserConn = "NewUserConn"

pkg/plugin/server/types.go

@@ -33,6 +33,8 @@ type Response struct {
 
 type LoginContent struct {
 	msg.Login
+
+	ClientAddress string `json:"client_address,omitempty"`
 }
 
 type UserInfo struct {
@@ -46,6 +48,11 @@ type NewProxyContent struct {
 	msg.NewProxy
 }
 
+type CloseProxyContent struct {
+	User UserInfo `json:"user"`
+	msg.CloseProxy
+}
+
 type PingContent struct {
 	User UserInfo `json:"user"`
 	msg.Ping

pkg/transport/tls.go

@@ -6,8 +6,8 @@ import (
 	"crypto/tls"
 	"crypto/x509"
 	"encoding/pem"
-	"io/ioutil"
 	"math/big"
+	"os"
 )
 
 func newCustomTLSKeyPair(certfile, keyfile string) (*tls.Certificate, error) {
@@ -47,7 +47,7 @@ func newRandomTLSKeyPair() *tls.Certificate {
 func newCertPool(caPath string) (*x509.CertPool, error) {
 	pool := x509.NewCertPool()
 
-	caCrt, err := ioutil.ReadFile(caPath)
+	caCrt, err := os.ReadFile(caPath)
 	if err != nil {
 		return nil, err
 	}
@@ -86,7 +86,7 @@ func NewServerTLSConfig(certPath, keyPath, caPath string) (*tls.Config, error) {
 	return base, nil
 }
 
-func NewClientTLSConfig(certPath, keyPath, caPath, servearName string) (*tls.Config, error) {
+func NewClientTLSConfig(certPath, keyPath, caPath, serverName string) (*tls.Config, error) {
 	var base = &tls.Config{}
 
 	if certPath == "" || keyPath == "" {
@@ -100,6 +100,8 @@ func NewClientTLSConfig(certPath, keyPath, caPath, servearName string) (*tls.Con
 		base.Certificates = []tls.Certificate{*cert}
 	}
 
+	base.ServerName = serverName
+
 	if caPath != "" {
 		pool, err := newCertPool(caPath)
 		if err != nil {
@@ -107,7 +109,6 @@ func NewClientTLSConfig(certPath, keyPath, caPath, servearName string) (*tls.Con
 		}
 
 		base.RootCAs = pool
-		base.ServerName = servearName
 		base.InsecureSkipVerify = false
 	} else {
 		base.InsecureSkipVerify = true

pkg/util/net/conn.go

@@ -16,18 +16,13 @@ package net
 
 import (
 	"context"
-	"crypto/tls"
 	"errors"
-	"fmt"
 	"io"
 	"net"
 	"sync/atomic"
 	"time"
 
 	"github.com/fatedier/frp/pkg/util/xlog"
-
-	gnet "github.com/fatedier/golib/net"
-	kcp "github.com/fatedier/kcp-go"
 )
 
 type ContextGetter interface {
@@ -188,56 +183,3 @@ func (statsConn *StatsConn) Close() (err error) {
 	}
 	return
 }
-
-func ConnectServer(protocol string, addr string) (c net.Conn, err error) {
-	switch protocol {
-	case "tcp":
-		return net.Dial("tcp", addr)
-	case "kcp":
-		kcpConn, errRet := kcp.DialWithOptions(addr, nil, 10, 3)
-		if errRet != nil {
-			err = errRet
-			return
-		}
-		kcpConn.SetStreamMode(true)
-		kcpConn.SetWriteDelay(true)
-		kcpConn.SetNoDelay(1, 20, 2, 1)
-		kcpConn.SetWindowSize(128, 512)
-		kcpConn.SetMtu(1350)
-		kcpConn.SetACKNoDelay(false)
-		kcpConn.SetReadBuffer(4194304)
-		kcpConn.SetWriteBuffer(4194304)
-		c = kcpConn
-		return
-	default:
-		return nil, fmt.Errorf("unsupport protocol: %s", protocol)
-	}
-}
-
-func ConnectServerByProxy(proxyURL string, protocol string, addr string) (c net.Conn, err error) {
-	switch protocol {
-	case "tcp":
-		return gnet.DialTcpByProxy(proxyURL, addr)
-	case "kcp":
-		// http proxy is not supported for kcp
-		return ConnectServer(protocol, addr)
-	case "websocket":
-		return ConnectWebsocketServer(addr)
-	default:
-		return nil, fmt.Errorf("unsupport protocol: %s", protocol)
-	}
-}
-
-func ConnectServerByProxyWithTLS(proxyURL string, protocol string, addr string, tlsConfig *tls.Config) (c net.Conn, err error) {
-	c, err = ConnectServerByProxy(proxyURL, protocol, addr)
-	if err != nil {
-		return
-	}
-
-	if tlsConfig == nil {
-		return
-	}
-
-	c = WrapTLSClientConn(c, tlsConfig)
-	return
-}

pkg/util/net/dial.go

@@ -0,0 +1,44 @@
+package net
+
+import (
+	"context"
+	"net"
+	"net/url"
+
+	libdial "github.com/fatedier/golib/net/dial"
+	"golang.org/x/net/websocket"
+)
+
+func DialHookCustomTLSHeadByte(enableTLS bool, disableCustomTLSHeadByte bool) libdial.AfterHookFunc {
+	return func(ctx context.Context, c net.Conn, addr string) (context.Context, net.Conn, error) {
+		if enableTLS && !disableCustomTLSHeadByte {
+			_, err := c.Write([]byte{byte(FRPTLSHeadByte)})
+			if err != nil {
+				return nil, nil, err
+			}
+		}
+		return ctx, c, nil
+	}
+}
+
+func DialHookWebsocket() libdial.AfterHookFunc {
+	return func(ctx context.Context, c net.Conn, addr string) (context.Context, net.Conn, error) {
+		addr = "ws://" + addr + FrpWebsocketPath
+		uri, err := url.Parse(addr)
+		if err != nil {
+			return nil, nil, err
+		}
+
+		origin := "http://" + uri.Host
+		cfg, err := websocket.NewConfig(addr, origin)
+		if err != nil {
+			return nil, nil, err
+		}
+
+		conn, err := websocket.NewClient(cfg, c)
+		if err != nil {
+			return nil, nil, err
+		}
+		return ctx, conn, nil
+	}
+}

pkg/util/net/tls.go

@@ -27,13 +27,10 @@ var (
 	FRPTLSHeadByte = 0x17
 )
 
-func WrapTLSClientConn(c net.Conn, tlsConfig *tls.Config) (out net.Conn) {
-	c.Write([]byte{byte(FRPTLSHeadByte)})
-	out = tls.Client(c, tlsConfig)
-	return
-}
+func CheckAndEnableTLSServerConnWithTimeout(
+	c net.Conn, tlsConfig *tls.Config, tlsOnly bool, timeout time.Duration,
+) (out net.Conn, isTLS bool, custom bool, err error) {
 
-func CheckAndEnableTLSServerConnWithTimeout(c net.Conn, tlsConfig *tls.Config, tlsOnly bool, timeout time.Duration) (out net.Conn, err error) {
 	sc, r := gnet.NewSharedConnSize(c, 2)
 	buf := make([]byte, 1)
 	var n int
@@ -46,6 +43,11 @@ func CheckAndEnableTLSServerConnWithTimeout(c net.Conn, tlsConfig *tls.Config, t
 
 	if n == 1 && int(buf[0]) == FRPTLSHeadByte {
 		out = tls.Server(c, tlsConfig)
+		isTLS = true
+		custom = true
+	} else if n == 1 && int(buf[0]) == 0x16 {
+		out = tls.Server(sc, tlsConfig)
+		isTLS = true
 	} else {
 		if tlsOnly {
 			err = fmt.Errorf("non-TLS connection received on a TlsOnly server")

pkg/util/net/udp.go

@@ -18,6 +18,7 @@ import (
 	"fmt"
 	"io"
 	"net"
+	"strconv"
 	"sync"
 	"time"
 
@@ -163,7 +164,7 @@ type UDPListener struct {
 }
 
 func ListenUDP(bindAddr string, bindPort int) (l *UDPListener, err error) {
-	udpAddr, err := net.ResolveUDPAddr("udp", fmt.Sprintf("%s:%d", bindAddr, bindPort))
+	udpAddr, err := net.ResolveUDPAddr("udp", net.JoinHostPort(bindAddr, strconv.Itoa(bindPort)))
 	if err != nil {
 		return l, err
 	}

pkg/util/net/websocket.go

@@ -2,11 +2,9 @@ package net
 
 import (
 	"errors"
-	"fmt"
 	"net"
 	"net/http"
-	"net/url"
-	"time"
+	"strconv"
 
 	"golang.org/x/net/websocket"
 )
@@ -54,7 +52,7 @@ func NewWebsocketListener(ln net.Listener) (wl *WebsocketListener) {
 }
 
 func ListenWebsocket(bindAddr string, bindPort int) (*WebsocketListener, error) {
-	tcpLn, err := net.Listen("tcp", fmt.Sprintf("%s:%d", bindAddr, bindPort))
+	tcpLn, err := net.Listen("tcp", net.JoinHostPort(bindAddr, strconv.Itoa(bindPort)))
 	if err != nil {
 		return nil, err
 	}
@@ -77,27 +75,3 @@ func (p *WebsocketListener) Close() error {
 func (p *WebsocketListener) Addr() net.Addr {
 	return p.ln.Addr()
 }
-
-// addr: domain:port
-func ConnectWebsocketServer(addr string) (net.Conn, error) {
-	addr = "ws://" + addr + FrpWebsocketPath
-	uri, err := url.Parse(addr)
-	if err != nil {
-		return nil, err
-	}
-
-	origin := "http://" + uri.Host
-	cfg, err := websocket.NewConfig(addr, origin)
-	if err != nil {
-		return nil, err
-	}
-	cfg.Dialer = &net.Dialer{
-		Timeout: 10 * time.Second,
-	}
-
-	conn, err := websocket.DialConfig(cfg)
-	if err != nil {
-		return nil, err
-	}
-	return conn, nil
-}

pkg/util/tcpmux/httpconnect.go

@@ -48,7 +48,7 @@ func readHTTPConnectRequest(rd io.Reader) (host string, err error) {
 		return
 	}
 
-	host = util.GetHostFromAddr(req.Host)
+	host, _ = util.CanonicalHost(req.Host)
 	return
 }
 

pkg/util/util/http.go

@@ -34,17 +34,6 @@ func OkResponse() *http.Response {
 	return res
 }
 
-// TODO: use "CanonicalHost" func to replace all "GetHostFromAddr" func.
-func GetHostFromAddr(addr string) (host string) {
-	strs := strings.Split(addr, ":")
-	if len(strs) > 1 {
-		host = strs[0]
-	} else {
-		host = addr
-	}
-	return
-}
-
 // canonicalHost strips port from host if present and returns the canonicalized
 // host name.
 func CanonicalHost(host string) (string, error) {

pkg/util/util/util.go

@@ -19,8 +19,11 @@ import (
 	"crypto/rand"
 	"encoding/hex"
 	"fmt"
+	mathrand "math/rand"
+	"net"
 	"strconv"
 	"strings"
+	"time"
 )
 
 // RandID return a rand string used in frp.
@@ -52,7 +55,7 @@ func CanonicalAddr(host string, port int) (addr string) {
 	if port == 80 || port == 443 {
 		addr = host
 	} else {
-		addr = fmt.Sprintf("%s:%d", host, port)
+		addr = net.JoinHostPort(host, strconv.Itoa(port))
 	}
 	return
 }
@@ -108,3 +111,17 @@ func GenerateResponseErrorString(summary string, err error, detailed bool) strin
 	}
 	return summary
 }
+
+func RandomSleep(duration time.Duration, minRatio, maxRatio float64) time.Duration {
+	min := int64(minRatio * 1000.0)
+	max := int64(maxRatio * 1000.0)
+	var n int64
+	if max <= min {
+		n = min
+	} else {
+		n = mathrand.Int63n(max-min) + min
+	}
+	d := duration * time.Duration(n) / time.Duration(1000)
+	time.Sleep(d)
+	return d
+}

pkg/util/version/version.go

@@ -19,7 +19,7 @@ import (
 	"strings"
 )
 
-var version string = "0.36.2"
+var version string = "0.41.0"
 
 func Full() string {
 	return version

pkg/util/vhost/http.go

@@ -59,7 +59,7 @@ func NewHTTPReverseProxy(option HTTPReverseProxyOptions, vhostRouter *Routers) *
 		Director: func(req *http.Request) {
 			req.URL.Scheme = "http"
 			url := req.Context().Value(RouteInfoURL).(string)
-			oldHost := util.GetHostFromAddr(req.Context().Value(RouteInfoHost).(string))
+			oldHost, _ := util.CanonicalHost(req.Context().Value(RouteInfoHost).(string))
 			rc := rp.GetRouteConfig(oldHost, url)
 			if rc != nil {
 				if rc.RewriteHost != "" {
@@ -81,7 +81,7 @@ func NewHTTPReverseProxy(option HTTPReverseProxyOptions, vhostRouter *Routers) *
 			IdleConnTimeout:       60 * time.Second,
 			DialContext: func(ctx context.Context, network, addr string) (net.Conn, error) {
 				url := ctx.Value(RouteInfoURL).(string)
-				host := util.GetHostFromAddr(ctx.Value(RouteInfoHost).(string))
+				host, _ := util.CanonicalHost(ctx.Value(RouteInfoHost).(string))
 				remote := ctx.Value(RouteInfoRemote).(string)
 				return rp.CreateConnection(host, url, remote)
 			},
@@ -191,7 +191,7 @@ func (rp *HTTPReverseProxy) getVhost(domain string, location string) (vr *Router
 }
 
 func (rp *HTTPReverseProxy) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
-	domain := util.GetHostFromAddr(req.Host)
+	domain, _ := util.CanonicalHost(req.Host)
 	location := req.URL.Path
 	user, passwd, _ := req.BasicAuth()
 	if !rp.CheckAuth(domain, location, user, passwd) {

pkg/util/vhost/https.go

@@ -15,32 +15,12 @@
 package vhost
 
 import (
-	"fmt"
+	"crypto/tls"
 	"io"
 	"net"
-	"strings"
 	"time"
 
 	gnet "github.com/fatedier/golib/net"
-	"github.com/fatedier/golib/pool"
-)
-
-const (
-	typeClientHello uint8 = 1 // Type client hello
-)
-
-// TLS extension numbers
-const (
-	extensionServerName          uint16 = 0
-	extensionStatusRequest       uint16 = 5
-	extensionSupportedCurves     uint16 = 10
-	extensionSupportedPoints     uint16 = 11
-	extensionSignatureAlgorithms uint16 = 13
-	extensionALPN                uint16 = 16
-	extensionSCT                 uint16 = 18
-	extensionSessionTicket       uint16 = 35
-	extensionNextProtoNeg        uint16 = 13172 // not IANA assigned
-	extensionRenegotiationInfo   uint16 = 0xff01
 )
 
 type HTTPSMuxer struct {
@@ -52,142 +32,49 @@ func NewHTTPSMuxer(listener net.Listener, timeout time.Duration) (*HTTPSMuxer, e
 	return &HTTPSMuxer{mux}, err
 }
 
-func readHandshake(rd io.Reader) (host string, err error) {
-	data := pool.GetBuf(1024)
-	origin := data
-	defer pool.PutBuf(origin)
-
-	_, err = io.ReadFull(rd, data[:47])
-	if err != nil {
-		return
-	}
-
-	length, err := rd.Read(data[47:])
-	if err != nil {
-		return
-	}
-	length += 47
-	data = data[:length]
-	if uint8(data[5]) != typeClientHello {
-		err = fmt.Errorf("readHandshake: type[%d] is not clientHello", uint16(data[5]))
-		return
-	}
-
-	// session
-	sessionIDLen := int(data[43])
-	if sessionIDLen > 32 || len(data) < 44+sessionIDLen {
-		err = fmt.Errorf("readHandshake: sessionIdLen[%d] is long", sessionIDLen)
-		return
-	}
-	data = data[44+sessionIDLen:]
-	if len(data) < 2 {
-		err = fmt.Errorf("readHandshake: dataLen[%d] after session is short", len(data))
-		return
-	}
-
-	// cipher suite numbers
-	cipherSuiteLen := int(data[0])<<8 | int(data[1])
-	if cipherSuiteLen%2 == 1 || len(data) < 2+cipherSuiteLen {
-		err = fmt.Errorf("readHandshake: dataLen[%d] after cipher suite is short", len(data))
-		return
-	}
-	data = data[2+cipherSuiteLen:]
-	if len(data) < 1 {
-		err = fmt.Errorf("readHandshake: cipherSuiteLen[%d] is long", cipherSuiteLen)
-		return
-	}
-
-	// compression method
-	compressionMethodsLen := int(data[0])
-	if len(data) < 1+compressionMethodsLen {
-		err = fmt.Errorf("readHandshake: compressionMethodsLen[%d] is long", compressionMethodsLen)
-		return
-	}
-
-	data = data[1+compressionMethodsLen:]
-	if len(data) == 0 {
-		// ClientHello is optionally followed by extension data
-		err = fmt.Errorf("readHandshake: there is no extension data to get servername")
-		return
-	}
-	if len(data) < 2 {
-		err = fmt.Errorf("readHandshake: extension dataLen[%d] is too short", len(data))
-		return
-	}
-
-	extensionsLength := int(data[0])<<8 | int(data[1])
-	data = data[2:]
-	if extensionsLength != len(data) {
-		err = fmt.Errorf("readHandshake: extensionsLen[%d] is not equal to dataLen[%d]", extensionsLength, len(data))
-		return
-	}
-	for len(data) != 0 {
-		if len(data) < 4 {
-			err = fmt.Errorf("readHandshake: extensionsDataLen[%d] is too short", len(data))
-			return
-		}
-		extension := uint16(data[0])<<8 | uint16(data[1])
-		length := int(data[2])<<8 | int(data[3])
-		data = data[4:]
-		if len(data) < length {
-			err = fmt.Errorf("readHandshake: extensionLen[%d] is long", length)
-			return
-		}
-
-		switch extension {
-		case extensionRenegotiationInfo:
-			if length != 1 || data[0] != 0 {
-				err = fmt.Errorf("readHandshake: extension reNegotiationInfoLen[%d] is short", length)
-				return
-			}
-		case extensionNextProtoNeg:
-		case extensionStatusRequest:
-		case extensionServerName:
-			d := data[:length]
-			if len(d) < 2 {
-				err = fmt.Errorf("readHandshake: remiaining dataLen[%d] is short", len(d))
-				return
-			}
-			namesLen := int(d[0])<<8 | int(d[1])
-			d = d[2:]
-			if len(d) != namesLen {
-				err = fmt.Errorf("readHandshake: nameListLen[%d] is not equal to dataLen[%d]", namesLen, len(d))
-				return
-			}
-			for len(d) > 0 {
-				if len(d) < 3 {
-					err = fmt.Errorf("readHandshake: extension serverNameLen[%d] is short", len(d))
-					return
-				}
-				nameType := d[0]
-				nameLen := int(d[1])<<8 | int(d[2])
-				d = d[3:]
-				if len(d) < nameLen {
-					err = fmt.Errorf("readHandshake: nameLen[%d] is not equal to dataLen[%d]", nameLen, len(d))
-					return
-				}
-				if nameType == 0 {
-					serverName := string(d[:nameLen])
-					host = strings.TrimSpace(serverName)
-					return host, nil
-				}
-				d = d[nameLen:]
-			}
-		}
-		data = data[length:]
-	}
-	err = fmt.Errorf("Unknown error")
-	return
-}
-
 func GetHTTPSHostname(c net.Conn) (_ net.Conn, _ map[string]string, err error) {
 	reqInfoMap := make(map[string]string, 0)
 	sc, rd := gnet.NewSharedConn(c)
-	host, err := readHandshake(rd)
+
+	clientHello, err := readClientHello(rd)
 	if err != nil {
 		return nil, reqInfoMap, err
 	}
-	reqInfoMap["Host"] = host
+
+	reqInfoMap["Host"] = clientHello.ServerName
 	reqInfoMap["Scheme"] = "https"
 	return sc, reqInfoMap, nil
 }
+
+func readClientHello(reader io.Reader) (*tls.ClientHelloInfo, error) {
+	var hello *tls.ClientHelloInfo
+
+	// Note that Handshake always fails because the readOnlyConn is not a real connection.
+	// As long as the Client Hello is successfully read, the failure should only happen after GetConfigForClient is called,
+	// so we only care about the error if hello was never set.
+	err := tls.Server(readOnlyConn{reader: reader}, &tls.Config{
+		GetConfigForClient: func(argHello *tls.ClientHelloInfo) (*tls.Config, error) {
+			hello = &tls.ClientHelloInfo{}
+			*hello = *argHello
+			return nil, nil
+		},
+	}).Handshake()
+
+	if hello == nil {
+		return nil, err
+	}
+	return hello, nil
+}
+
+type readOnlyConn struct {
+	reader io.Reader
+}
+
+func (conn readOnlyConn) Read(p []byte) (int, error)         { return conn.reader.Read(p) }
+func (conn readOnlyConn) Write(p []byte) (int, error)        { return 0, io.ErrClosedPipe }
+func (conn readOnlyConn) Close() error                       { return nil }
+func (conn readOnlyConn) LocalAddr() net.Addr                { return nil }
+func (conn readOnlyConn) RemoteAddr() net.Addr               { return nil }
+func (conn readOnlyConn) SetDeadline(t time.Time) error      { return nil }
+func (conn readOnlyConn) SetReadDeadline(t time.Time) error  { return nil }
+func (conn readOnlyConn) SetWriteDeadline(t time.Time) error { return nil }

pkg/util/vhost/https_test.go

@@ -0,0 +1,38 @@
+package vhost
+
+import (
+	"crypto/tls"
+	"net"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestGetHTTPSHostname(t *testing.T) {
+	require := require.New(t)
+
+	l, err := net.Listen("tcp", ":")
+	require.NoError(err)
+	defer l.Close()
+
+	var conn net.Conn
+	go func() {
+		conn, _ = l.Accept()
+		require.NotNil(conn)
+	}()
+
+	go func() {
+		time.Sleep(100 * time.Millisecond)
+		tls.Dial("tcp", l.Addr().String(), &tls.Config{
+			InsecureSkipVerify: true,
+			ServerName:         "example.com",
+		})
+	}()
+
+	time.Sleep(200 * time.Millisecond)
+	_, infos, err := GetHTTPSHostname(conn)
+	require.NoError(err)
+	require.Equal("example.com", infos["Host"])
+	require.Equal("https", infos["Scheme"])
+}

pkg/util/vhost/resource.go

@@ -16,8 +16,9 @@ package vhost
 
 import (
 	"bytes"
-	"io/ioutil"
+	"io"
 	"net/http"
+	"os"
 
 	frpLog "github.com/fatedier/frp/pkg/util/log"
 	"github.com/fatedier/frp/pkg/util/version"
@@ -57,7 +58,7 @@ func getNotFoundPageContent() []byte {
 		err error
 	)
 	if NotFoundPagePath != "" {
-		buf, err = ioutil.ReadFile(NotFoundPagePath)
+		buf, err = os.ReadFile(NotFoundPagePath)
 		if err != nil {
 			frpLog.Warn("read custom 404 page error: %v", err)
 			buf = []byte(NotFound)
@@ -80,7 +81,7 @@ func notFoundResponse() *http.Response {
 		ProtoMajor: 1,
 		ProtoMinor: 0,
 		Header:     header,
-		Body:       ioutil.NopCloser(bytes.NewReader(getNotFoundPageContent())),
+		Body:       io.NopCloser(bytes.NewReader(getNotFoundPageContent())),
 	}
 	return res
 }

server/control.go

@@ -248,12 +248,10 @@ func (ctl *Control) GetWorkConn() (workConn net.Conn, err error) {
 		xl.Debug("get work connection from pool")
 	default:
 		// no work connections available in the poll, send message to frpc to get more
-		err = errors.PanicToError(func() {
+		if err = errors.PanicToError(func() {
 			ctl.sendCh <- &msg.ReqWorkConn{}
-		})
-		if err != nil {
-			xl.Error("%v", err)
-			return
+		}); err != nil {
+			return nil, fmt.Errorf("control is already closed")
 		}
 
 		select {
@@ -357,15 +355,15 @@ func (ctl *Control) stoper() {
 
 	ctl.allShutdown.WaitStart()
 
+	ctl.conn.Close()
+	ctl.readerShutdown.WaitDone()
+
 	close(ctl.readCh)
 	ctl.managerShutdown.WaitDone()
 
 	close(ctl.sendCh)
 	ctl.writerShutdown.WaitDone()
 
-	ctl.conn.Close()
-	ctl.readerShutdown.WaitDone()
-
 	ctl.mu.Lock()
 	defer ctl.mu.Unlock()
 
@@ -378,6 +376,20 @@ func (ctl *Control) stoper() {
 		pxy.Close()
 		ctl.pxyManager.Del(pxy.GetName())
 		metrics.Server.CloseProxy(pxy.GetName(), pxy.GetConf().GetBaseInfo().ProxyType)
+
+		notifyContent := &plugin.CloseProxyContent{
+			User: plugin.UserInfo{
+				User:  ctl.loginMsg.User,
+				Metas: ctl.loginMsg.Metas,
+				RunID: ctl.loginMsg.RunID,
+			},
+			CloseProxy: msg.CloseProxy{
+				ProxyName: pxy.GetName(),
+			},
+		}
+		go func() {
+			ctl.pluginManager.CloseProxy(notifyContent)
+		}()
 	}
 
 	ctl.allShutdown.Done()
@@ -402,12 +414,19 @@ func (ctl *Control) manager() {
 	defer ctl.allShutdown.Start()
 	defer ctl.managerShutdown.Done()
 
-	heartbeat := time.NewTicker(time.Second)
-	defer heartbeat.Stop()
+	var heartbeatCh <-chan time.Time
+	if ctl.serverCfg.TCPMux || ctl.serverCfg.HeartbeatTimeout <= 0 {
+		// Don't need application heartbeat here.
+		// yamux will do same thing.
+	} else {
+		heartbeat := time.NewTicker(time.Second)
+		defer heartbeat.Stop()
+		heartbeatCh = heartbeat.C
+	}
 
 	for {
 		select {
-		case <-heartbeat.C:
+		case <-heartbeatCh:
 			if time.Since(ctl.lastPing) > time.Duration(ctl.serverCfg.HeartbeatTimeout)*time.Second {
 				xl.Warn("heartbeat timeout")
 				return
@@ -559,5 +578,20 @@ func (ctl *Control) CloseProxy(closeMsg *msg.CloseProxy) (err error) {
 	ctl.mu.Unlock()
 
 	metrics.Server.CloseProxy(pxy.GetName(), pxy.GetConf().GetBaseInfo().ProxyType)
+
+	notifyContent := &plugin.CloseProxyContent{
+		User: plugin.UserInfo{
+			User:  ctl.loginMsg.User,
+			Metas: ctl.loginMsg.Metas,
+			RunID: ctl.loginMsg.RunID,
+		},
+		CloseProxy: msg.CloseProxy{
+			ProxyName: pxy.GetName(),
+		},
+	}
+	go func() {
+		ctl.pluginManager.CloseProxy(notifyContent)
+	}()
+
 	return
 }

server/dashboard.go

@@ -17,6 +17,7 @@ package server
 import (
 	"net"
 	"net/http"
+	"net/http/pprof"
 	"time"
 
 	"github.com/fatedier/frp/assets"
@@ -27,33 +28,45 @@ import (
 )
 
 var (
-	httpServerReadTimeout  = 10 * time.Second
-	httpServerWriteTimeout = 10 * time.Second
+	httpServerReadTimeout  = 60 * time.Second
+	httpServerWriteTimeout = 60 * time.Second
 )
 
 func (svr *Service) RunDashboardServer(address string) (err error) {
 	// url router
 	router := mux.NewRouter()
+	router.HandleFunc("/healthz", svr.Healthz)
+
+	// debug
+	if svr.cfg.PprofEnable {
+		router.HandleFunc("/debug/pprof/cmdline", pprof.Cmdline)
+		router.HandleFunc("/debug/pprof/profile", pprof.Profile)
+		router.HandleFunc("/debug/pprof/symbol", pprof.Symbol)
+		router.HandleFunc("/debug/pprof/trace", pprof.Trace)
+		router.PathPrefix("/debug/pprof/").HandlerFunc(pprof.Index)
+	}
+
+	subRouter := router.NewRoute().Subrouter()
 
 	user, passwd := svr.cfg.DashboardUser, svr.cfg.DashboardPwd
-	router.Use(frpNet.NewHTTPAuthMiddleware(user, passwd).Middleware)
+	subRouter.Use(frpNet.NewHTTPAuthMiddleware(user, passwd).Middleware)
 
 	// metrics
 	if svr.cfg.EnablePrometheus {
-		router.Handle("/metrics", promhttp.Handler())
+		subRouter.Handle("/metrics", promhttp.Handler())
 	}
 
 	// api, see dashboard_api.go
-	router.HandleFunc("/api/serverinfo", svr.APIServerInfo).Methods("GET")
-	router.HandleFunc("/api/proxy/{type}", svr.APIProxyByType).Methods("GET")
-	router.HandleFunc("/api/proxy/{type}/{name}", svr.APIProxyByTypeAndName).Methods("GET")
-	router.HandleFunc("/api/traffic/{name}", svr.APIProxyTraffic).Methods("GET")
+	subRouter.HandleFunc("/api/serverinfo", svr.APIServerInfo).Methods("GET")
+	subRouter.HandleFunc("/api/proxy/{type}", svr.APIProxyByType).Methods("GET")
+	subRouter.HandleFunc("/api/proxy/{type}/{name}", svr.APIProxyByTypeAndName).Methods("GET")
+	subRouter.HandleFunc("/api/traffic/{name}", svr.APIProxyTraffic).Methods("GET")
 
 	// view
-	router.Handle("/favicon.ico", http.FileServer(assets.FileSystem)).Methods("GET")
-	router.PathPrefix("/static/").Handler(frpNet.MakeHTTPGzipHandler(http.StripPrefix("/static/", http.FileServer(assets.FileSystem)))).Methods("GET")
+	subRouter.Handle("/favicon.ico", http.FileServer(assets.FileSystem)).Methods("GET")
+	subRouter.PathPrefix("/static/").Handler(frpNet.MakeHTTPGzipHandler(http.StripPrefix("/static/", http.FileServer(assets.FileSystem)))).Methods("GET")
 
-	router.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+	subRouter.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
 		http.Redirect(w, r, "/static/", http.StatusMovedPermanently)
 	})
 

server/dashboard_api.go

@@ -51,6 +51,11 @@ type serverInfoResp struct {
 	ProxyTypeCounts map[string]int64 `json:"proxy_type_count"`
 }
 
+// /healthz
+func (svr *Service) Healthz(w http.ResponseWriter, r *http.Request) {
+	w.WriteHeader(200)
+}
+
 // api/serverinfo
 func (svr *Service) APIServerInfo(w http.ResponseWriter, r *http.Request) {
 	res := GeneralResponse{Code: 200}

server/group/tcp.go

@@ -15,8 +15,8 @@
 package group
 
 import (
-	"fmt"
 	"net"
+	"strconv"
 	"sync"
 
 	"github.com/fatedier/frp/server/ports"
@@ -101,7 +101,7 @@ func (tg *TCPGroup) Listen(proxyName string, group string, groupKey string, addr
 		if err != nil {
 			return
 		}
-		tcpLn, errRet := net.Listen("tcp", fmt.Sprintf("%s:%d", addr, port))
+		tcpLn, errRet := net.Listen("tcp", net.JoinHostPort(addr, strconv.Itoa(port)))
 		if errRet != nil {
 			err = errRet
 			return

server/ports/ports.go

@@ -2,8 +2,8 @@ package ports
 
 import (
 	"errors"
-	"fmt"
 	"net"
+	"strconv"
 	"sync"
 	"time"
 )
@@ -134,7 +134,7 @@ func (pm *Manager) Acquire(name string, port int) (realPort int, err error) {
 
 func (pm *Manager) isPortAvailable(port int) bool {
 	if pm.netType == "udp" {
-		addr, err := net.ResolveUDPAddr("udp", fmt.Sprintf("%s:%d", pm.bindAddr, port))
+		addr, err := net.ResolveUDPAddr("udp", net.JoinHostPort(pm.bindAddr, strconv.Itoa(port)))
 		if err != nil {
 			return false
 		}
@@ -146,7 +146,7 @@ func (pm *Manager) isPortAvailable(port int) bool {
 		return true
 	}
 
-	l, err := net.Listen(pm.netType, fmt.Sprintf("%s:%d", pm.bindAddr, port))
+	l, err := net.Listen(pm.netType, net.JoinHostPort(pm.bindAddr, strconv.Itoa(port)))
 	if err != nil {
 		return false
 	}

server/proxy/proxy.go

@@ -21,6 +21,7 @@ import (
 	"net"
 	"strconv"
 	"sync"
+	"time"
 
 	"github.com/fatedier/frp/pkg/config"
 	"github.com/fatedier/frp/pkg/msg"
@@ -151,12 +152,28 @@ func (pxy *BaseProxy) startListenHandler(p Proxy, handler func(Proxy, net.Conn,
 	xl := xlog.FromContextSafe(pxy.ctx)
 	for _, listener := range pxy.listeners {
 		go func(l net.Listener) {
+			var tempDelay time.Duration // how long to sleep on accept failure
+
 			for {
 				// block
 				// if listener is closed, err returned
 				c, err := l.Accept()
 				if err != nil {
-					xl.Info("listener is closed")
+					if err, ok := err.(interface{ Temporary() bool }); ok && err.Temporary() {
+						if tempDelay == 0 {
+							tempDelay = 5 * time.Millisecond
+						} else {
+							tempDelay *= 2
+						}
+						if max := 1 * time.Second; tempDelay > max {
+							tempDelay = max
+						}
+						xl.Info("met temporary error: %s, sleep for %s ...", err, tempDelay)
+						time.Sleep(tempDelay)
+						continue
+					}
+
+					xl.Warn("listener is closed: %s", err)
 					return
 				}
 				xl.Info("get a user connection [%s]", c.RemoteAddr().String())

server/proxy/tcp.go

@@ -17,6 +17,7 @@ package proxy
 import (
 	"fmt"
 	"net"
+	"strconv"
 
 	"github.com/fatedier/frp/pkg/config"
 )
@@ -54,7 +55,7 @@ func (pxy *TCPProxy) Run() (remoteAddr string, err error) {
 				pxy.rc.TCPPortManager.Release(pxy.realPort)
 			}
 		}()
-		listener, errRet := net.Listen("tcp", fmt.Sprintf("%s:%d", pxy.serverCfg.ProxyBindAddr, pxy.realPort))
+		listener, errRet := net.Listen("tcp", net.JoinHostPort(pxy.serverCfg.ProxyBindAddr, strconv.Itoa(pxy.realPort)))
 		if errRet != nil {
 			err = errRet
 			return

server/proxy/udp.go

@@ -19,6 +19,7 @@ import (
 	"fmt"
 	"io"
 	"net"
+	"strconv"
 	"time"
 
 	"github.com/fatedier/frp/pkg/config"
@@ -60,7 +61,7 @@ func (pxy *UDPProxy) Run() (remoteAddr string, err error) {
 	xl := pxy.xl
 	pxy.realPort, err = pxy.rc.UDPPortManager.Acquire(pxy.name, pxy.cfg.RemotePort)
 	if err != nil {
-		return
+		return "", fmt.Errorf("acquire port %d error: %v", pxy.cfg.RemotePort, err)
 	}
 	defer func() {
 		if err != nil {
@@ -70,7 +71,7 @@ func (pxy *UDPProxy) Run() (remoteAddr string, err error) {
 
 	remoteAddr = fmt.Sprintf(":%d", pxy.realPort)
 	pxy.cfg.RemotePort = pxy.realPort
-	addr, errRet := net.ResolveUDPAddr("udp", fmt.Sprintf("%s:%d", pxy.serverCfg.ProxyBindAddr, pxy.realPort))
+	addr, errRet := net.ResolveUDPAddr("udp", net.JoinHostPort(pxy.serverCfg.ProxyBindAddr, strconv.Itoa(pxy.realPort)))
 	if errRet != nil {
 		err = errRet
 		return