├── .github └── workflows │ ├── checks.yml │ └── release.yml ├── .gitignore ├── .goreleaser.yml ├── LICENSE ├── README.md ├── go.mod ├── go.sum └── main.go /.github/workflows/checks.yml: -------------------------------------------------------------------------------- 1 | name: checks 2 | 3 | on: 4 | push: 5 | branches: ['main'] 6 | pull_request: 7 | branches: ['*'] 8 | 9 | jobs: 10 | checks: 11 | runs-on: ubuntu-latest 12 | steps: 13 | - uses: actions/checkout@v2 14 | with: 15 | fetch-depth: 0 16 | - name: Set up Go 17 | uses: actions/setup-go@v2 18 | with: 19 | go-version: 1.18 20 | - run: go install mvdan.cc/gofumpt@latest 21 | - run: test -z $(gofumpt -l .) 22 | - run: go vet ./... 23 | - run: go build ./... 24 | -------------------------------------------------------------------------------- /.github/workflows/release.yml: -------------------------------------------------------------------------------- 1 | name: release 2 | 3 | on: 4 | push: 5 | tags: ['v*'] 6 | 7 | permissions: 8 | contents: write 9 | packages: write 10 | 11 | jobs: 12 | release: 13 | runs-on: ubuntu-latest 14 | steps: 15 | - uses: actions/checkout@v2 16 | with: 17 | fetch-depth: 0 18 | - name: Set up Go 19 | uses: actions/setup-go@v2 20 | with: 21 | go-version: 1.18 22 | - uses: goreleaser/goreleaser-action@v2 23 | with: 24 | distribution: goreleaser 25 | version: latest 26 | args: release --rm-dist 27 | env: 28 | GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }} 29 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | tsstate/ 2 | dist/ 3 | -------------------------------------------------------------------------------- /.goreleaser.yml: -------------------------------------------------------------------------------- 1 | before: 2 | hooks: 3 | - go mod tidy -compat=1.17 4 | builds: 5 | - env: 6 | - CGO_ENABLED=0 7 | goos: 8 | - linux 9 | - windows 10 | - darwin 11 | goarch: 12 | - amd64 13 | - arm64 14 | ignore: 15 | - goos: windows 16 | goarch: arm64 17 | checksum: 18 | name_template: 'checksums.txt' 19 | snapshot: 20 | name_template: "{{ .Tag }}-next" 21 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | MIT License 2 | 3 | Permission is hereby granted, free of charge, to any person obtaining a copy 4 | of this software and associated documentation files (the "Software"), to deal 5 | in the Software without restriction, including without limitation the rights 6 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 7 | copies of the Software, and to permit persons to whom the Software is 8 | furnished to do so, subject to the following conditions: 9 | 10 | The above copyright notice and this permission notice shall be included in all 11 | copies or substantial portions of the Software. 12 | 13 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 14 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 15 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 16 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 17 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 18 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 19 | SOFTWARE. 20 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # tailscale-netcat 2 | 3 | This tool is designed to immitate netcat for the purposes of SSH's ProxyCommand. It may work for other uses of netcat within a Tailscale network but I wouldn't trust it. 4 | 5 | ## Usage 6 | 7 | On first run you will need to login, a link is provided for ease of use. Auth keys are also supported, see below for use 8 | ``` 9 | sean@laptop:~$ ssh -o 'ProxyCommand tailscale-netcat -host %h -port %p' myserver 10 | 2022/04/02 15:54:42 NeedsLogin: https://login.tailscale.com/a/12345678 11 | kex_exchange_identification: Connection closed by remote host 12 | ``` 13 | 14 | On second login, you'll be in: 15 | ``` 16 | sean@laptop:~$ ssh -o 'ProxyCommand tailscale-netcat -host %h -port %p' myserver 17 | sean@myserver:~$ 18 | ``` 19 | 20 | Optional Env Vars: 21 | 22 | `TS_AUTHKEY` is now enabled for this project. You can provide this variable with a key, consult the tailscale documentation to determine the appropriate key to use. 23 | 24 | `TS_STATEDIR` is the location where Tailscale keeps its state data.. This is used to not need to re-authorise the instance. 25 | 26 | 27 | ## Credits 28 | * https://github.com/markpash/tailscale-sidecar 29 | * https://github.com/vfedoroff/go-netcat 30 | -------------------------------------------------------------------------------- /go.mod: -------------------------------------------------------------------------------- 1 | module github.com/seanhood/tailscale-netcat 2 | 3 | go 1.17 4 | 5 | require tailscale.com v1.22.2 6 | 7 | require ( 8 | github.com/akutz/memconn v0.1.0 // indirect 9 | github.com/alexbrainman/sspi v0.0.0-20210105120005-909beea2cc74 // indirect 10 | github.com/anmitsu/go-shlex v0.0.0-20200514113438-38f4b401e2be // indirect 11 | github.com/coreos/go-iptables v0.6.0 // indirect 12 | github.com/creack/pty v1.1.17 // indirect 13 | github.com/gliderlabs/ssh v0.3.3 // indirect 14 | github.com/go-ole/go-ole v1.2.6 // indirect 15 | github.com/godbus/dbus/v5 v5.0.6 // indirect 16 | github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect 17 | github.com/google/btree v1.0.1 // indirect 18 | github.com/google/go-cmp v0.5.7 // indirect 19 | github.com/insomniacslk/dhcp v0.0.0-20211026125128-ad197bcd36fd // indirect 20 | github.com/josharian/native v1.0.0 // indirect 21 | github.com/jsimonetti/rtnetlink v0.0.0-20211203074127-fd9a11f42291 // indirect 22 | github.com/klauspost/compress v1.13.6 // indirect 23 | github.com/mdlayher/netlink v1.6.0 // indirect 24 | github.com/mdlayher/sdnotify v0.0.0-20210228150836-ea3ec207d697 // indirect 25 | github.com/mdlayher/socket v0.1.1 // indirect 26 | github.com/mitchellh/go-ps v1.0.0 // indirect 27 | github.com/pkg/errors v0.9.1 // indirect 28 | github.com/tailscale/certstore v0.0.0-20210528134328-066c94b793d3 // indirect 29 | github.com/tailscale/goupnp v1.0.1-0.20210804011211-c64d0f06ea05 // indirect 30 | github.com/tailscale/netlink v1.1.1-0.20211101221916-cabfb018fe85 // indirect 31 | github.com/tcnksm/go-httpstat v0.2.0 // indirect 32 | github.com/u-root/uio v0.0.0-20210528114334-82958018845c // indirect 33 | github.com/vishvananda/netlink v1.1.1-0.20211101163509-b10eb8fe5cf6 // indirect 34 | github.com/vishvananda/netns v0.0.0-20211101163701-50045581ed74 // indirect 35 | go4.org/intern v0.0.0-20211027215823-ae77deb06f29 // indirect 36 | go4.org/mem v0.0.0-20210711025021-927187094b94 // indirect 37 | go4.org/unsafe/assume-no-moving-gc v0.0.0-20211027215541-db492cf91b37 // indirect 38 | golang.org/x/crypto v0.0.0-20211202192323-5770296d904e // indirect 39 | golang.org/x/net v0.0.0-20220127200216-cd36cc0744dd // indirect 40 | golang.org/x/sync v0.0.0-20210220032951-036812b2e83c // indirect 41 | golang.org/x/sys v0.0.0-20220128215802-99c3d69c2c27 // indirect 42 | golang.org/x/text v0.3.7 // indirect 43 | golang.org/x/time v0.0.0-20211116232009-f0f3c7e86c11 // indirect 44 | golang.zx2c4.com/wintun v0.0.0-20211104114900-415007cec224 // indirect 45 | golang.zx2c4.com/wireguard v0.0.0-20211116201604-de7c702ace45 // indirect 46 | golang.zx2c4.com/wireguard/windows v0.4.10 // indirect 47 | gvisor.dev/gvisor v0.0.0-20220126021142-d8aa030b2591 // indirect 48 | inet.af/netaddr v0.0.0-20211027220019-c74959edd3b6 // indirect 49 | nhooyr.io/websocket v1.8.7 // indirect 50 | ) 51 | -------------------------------------------------------------------------------- /go.sum: -------------------------------------------------------------------------------- 1 | filippo.io/mkcert v1.4.3 h1:axpnmtrZMM8u5Hf4N3UXxboGemMOV+Tn+e+pkHM6E3o= 2 | github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU= 3 | github.com/BurntSushi/toml v0.4.1 h1:GaI7EiDXDRfa8VshkTj7Fym7ha+y8/XxIgD2okUIjLw= 4 | github.com/BurntSushi/toml v0.4.1/go.mod h1:CxXYINrC8qIiEnFrOxCa7Jy5BFHlXnUU2pbicEuybxQ= 5 | github.com/akutz/memconn v0.1.0 h1:NawI0TORU4hcOMsMr11g7vwlCdkYeLKXBcxWu2W/P8A= 6 | github.com/akutz/memconn v0.1.0/go.mod h1:Jo8rI7m0NieZyLI5e2CDlRdRqRRB4S7Xp77ukDjH+Fw= 7 | github.com/alexbrainman/sspi v0.0.0-20210105120005-909beea2cc74 h1:Kk6a4nehpJ3UuJRqlA3JxYxBZEqCeOmATOvrbT4p9RA= 8 | github.com/alexbrainman/sspi v0.0.0-20210105120005-909beea2cc74/go.mod h1:cEWa1LVoE5KvSD9ONXsZrj0z6KqySlCCNKHlLzbqAt4= 9 | github.com/anmitsu/go-shlex v0.0.0-20200514113438-38f4b401e2be h1:9AeTilPcZAjCFIImctFaOjnTIavg87rW78vTPkQqLI8= 10 | github.com/anmitsu/go-shlex v0.0.0-20200514113438-38f4b401e2be/go.mod h1:ySMOLuWl6zY27l47sB3qLNK6tF2fkHG55UZxx8oIVo4= 11 | github.com/cilium/ebpf v0.5.0/go.mod h1:4tRaxcgiL706VnOzHOdBlY8IEAIdxINsQBcU4xJJXRs= 12 | github.com/cilium/ebpf v0.7.0 h1:1k/q3ATgxSXRdrmPfH8d7YK0GfqVsEKZAX9dQZvs56k= 13 | github.com/cilium/ebpf v0.7.0/go.mod h1:/oI2+1shJiTGAMgl6/RgJr36Eo1jzrRcAWbcXO2usCA= 14 | github.com/coreos/go-iptables v0.6.0 h1:is9qnZMPYjLd8LYqmm/qlE+wwEgJIkTYdhV3rfZo4jk= 15 | github.com/coreos/go-iptables v0.6.0/go.mod h1:Qe8Bv2Xik5FyTXwgIbLAnv2sWSBmvWdFETJConOQ//Q= 16 | github.com/creack/pty v1.1.17 h1:QeVUsEDNrLBW4tMgZHvxy18sKtr6VI492kBhUfhDJNI= 17 | github.com/creack/pty v1.1.17/go.mod h1:MOBLtS5ELjhRRrroQr9kyvTxUAFNvYEK993ew/Vr4O4= 18 | github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= 19 | github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c= 20 | github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= 21 | github.com/dvyukov/go-fuzz v0.0.0-20210103155950-6a8e9d1f2415/go.mod h1:11Gm+ccJnvAhCNLlf5+cS9KjtbaD5I5zaZpFMsTHWTw= 22 | github.com/fanliao/go-promise v0.0.0-20141029170127-1890db352a72/go.mod h1:PjfxuH4FZdUyfMdtBio2lsRr1AKEaVPwelzuHuh8Lqc= 23 | github.com/frankban/quicktest v1.11.3/go.mod h1:wRf/ReqHper53s+kmmSZizM8NamnL3IM0I9ntUbOk+k= 24 | github.com/frankban/quicktest v1.14.0 h1:+cqqvzZV87b4adx/5ayVOaYZ2CrvM4ejQvUdBzPPUss= 25 | github.com/gin-contrib/sse v0.1.0 h1:Y/yl/+YNO8GZSjAhjMsSuLt29uWRFHdHYUb5lYOV9qE= 26 | github.com/gin-contrib/sse v0.1.0/go.mod h1:RHrZQHXnP2xjPF+u1gW/2HnVO7nvIa9PG3Gm+fLHvGI= 27 | github.com/gin-gonic/gin v1.6.3 h1:ahKqKTFpO5KTPHxWZjEdPScmYaGtLo8Y4DMHoEsnp14= 28 | github.com/gin-gonic/gin v1.6.3/go.mod h1:75u5sXoLsGZoRN5Sgbi1eraJ4GU3++wFwWzhwvtwp4M= 29 | github.com/github/fakeca v0.1.0 h1:Km/MVOFvclqxPM9dZBC4+QE564nU4gz4iZ0D9pMw28I= 30 | github.com/github/fakeca v0.1.0/go.mod h1:+bormgoGMMuamOscx7N91aOuUST7wdaJ2rNjeohylyo= 31 | github.com/gliderlabs/ssh v0.3.3 h1:mBQ8NiOgDkINJrZtoizkC3nDNYgSaWtxyem6S2XHBtA= 32 | github.com/gliderlabs/ssh v0.3.3/go.mod h1:ZSS+CUoKHDrqVakTfTWUlKSr9MtMFkC4UvtQKD7O914= 33 | github.com/go-ole/go-ole v1.2.6 h1:/Fpf6oFPoeFik9ty7siob0G6Ke8QvQEuVcuChpwXzpY= 34 | github.com/go-ole/go-ole v1.2.6/go.mod h1:pprOEPIfldk/42T2oK7lQ4v4JSDwmV0As9GaiUsvbm0= 35 | github.com/go-playground/assert/v2 v2.0.1/go.mod h1:VDjEfimB/XKnb+ZQfWdccd7VUvScMdVu0Titje2rxJ4= 36 | github.com/go-playground/locales v0.13.0 h1:HyWk6mgj5qFqCT5fjGBuRArbVDfE4hi8+e8ceBS/t7Q= 37 | github.com/go-playground/locales v0.13.0/go.mod h1:taPMhCMXrRLJO55olJkUXHZBHCxTMfnGwq/HNwmWNS8= 38 | github.com/go-playground/universal-translator v0.17.0 h1:icxd5fm+REJzpZx7ZfpaD876Lmtgy7VtROAbHHXk8no= 39 | github.com/go-playground/universal-translator v0.17.0/go.mod h1:UkSxE5sNxxRwHyU+Scu5vgOQjsIJAF8j9muTVoKLVtA= 40 | github.com/go-playground/validator/v10 v10.2.0 h1:KgJ0snyC2R9VXYN2rneOtQcw5aHQB1Vv0sFl1UcHBOY= 41 | github.com/go-playground/validator/v10 v10.2.0/go.mod h1:uOYAAleCW8F/7oMFd6aG0GOhaH6EGOAJShg8Id5JGkI= 42 | github.com/gobwas/httphead v0.0.0-20180130184737-2c6c146eadee h1:s+21KNqlpePfkah2I+gwHF8xmJWRjooY+5248k6m4A0= 43 | github.com/gobwas/httphead v0.0.0-20180130184737-2c6c146eadee/go.mod h1:L0fX3K22YWvt/FAX9NnzrNzcI4wNYi9Yku4O0LKYflo= 44 | github.com/gobwas/pool v0.2.0 h1:QEmUOlnSjWtnpRGHF3SauEiOsy82Cup83Vf2LcMlnc8= 45 | github.com/gobwas/pool v0.2.0/go.mod h1:q8bcK0KcYlCgd9e7WYLm9LpyS+YeLd8JVDW6WezmKEw= 46 | github.com/gobwas/ws v1.0.2 h1:CoAavW/wd/kulfZmSIBt6p24n4j7tHgNVCjsfHVNUbo= 47 | github.com/gobwas/ws v1.0.2/go.mod h1:szmBTxLgaFppYjEmNtny/v3w89xOydFnnZMcgRRu/EM= 48 | github.com/godbus/dbus/v5 v5.0.6 h1:mkgN1ofwASrYnJ5W6U/BxG15eXXXjirgZc7CLqkcaro= 49 | github.com/godbus/dbus/v5 v5.0.6/go.mod h1:xhWf0FNVPg57R7Z0UbKHbJfkEywrmjJnf7w5xrFpKfA= 50 | github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da h1:oI5xCqsCo564l8iNU+DwB5epxmsaqB+rhGL0m5jtYqE= 51 | github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc= 52 | github.com/golang/protobuf v1.3.3/go.mod h1:vzj43D7+SQXF/4pzW/hwtAqwc6iTitCiVSaWz5lYuqw= 53 | github.com/golang/protobuf v1.3.5/go.mod h1:6O5/vntMXwX2lRkT1hjjk0nAC1IDOTvTlVgjlRvqsdk= 54 | github.com/golang/protobuf v1.5.2 h1:ROPKBNFfQgOUMifHyP+KYbvpjbdoFNs+aK7DXlji0Tw= 55 | github.com/google/btree v1.0.1 h1:gK4Kx5IaGY9CD5sPJ36FHiBJ6ZXl0kilRiiCj+jdYp4= 56 | github.com/google/btree v1.0.1/go.mod h1:xXMiIv4Fb/0kKde4SpL7qlzvu5cMJDRkFDxJfI9uaxA= 57 | github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M= 58 | github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU= 59 | github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU= 60 | github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE= 61 | github.com/google/go-cmp v0.5.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE= 62 | github.com/google/go-cmp v0.5.2/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE= 63 | github.com/google/go-cmp v0.5.4/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE= 64 | github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE= 65 | github.com/google/go-cmp v0.5.6/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE= 66 | github.com/google/go-cmp v0.5.7 h1:81/ik6ipDQS2aGcBfIN5dHDB36BwrStyeAQquSYCV4o= 67 | github.com/google/go-cmp v0.5.7/go.mod h1:n+brtR0CgQNWTVd5ZUFpTBC8YFBDLK/h/bpaJ8/DtOE= 68 | github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg= 69 | github.com/gopherjs/gopherjs v0.0.0-20181017120253-0766667cb4d1/go.mod h1:wJfORRmW1u3UXTncJ5qlYoELFm8eSnnEO6hX4iZ3EWY= 70 | github.com/gorilla/websocket v1.4.1 h1:q7AeDBpnBk8AogcD4DSag/Ukw/KV+YhzLj2bP5HvKCM= 71 | github.com/gorilla/websocket v1.4.1/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE= 72 | github.com/hugelgupf/socketpair v0.0.0-20190730060125-05d35a94e714/go.mod h1:2Goc3h8EklBH5mspfHFxBnEoURQCGzQQH1ga9Myjvis= 73 | github.com/insomniacslk/dhcp v0.0.0-20211026125128-ad197bcd36fd h1:jupbuQFZtwOBg/3EmK91/rGaYFkqCb9bwHOnwn7Cav0= 74 | github.com/insomniacslk/dhcp v0.0.0-20211026125128-ad197bcd36fd/go.mod h1:h+MxyHxRg9NH3terB1nfRIUaQEcI0XOVkdR9LNBlp8E= 75 | github.com/josharian/native v0.0.0-20200817173448-b6b71def0850/go.mod h1:7X/raswPFr05uY3HiLlYeyQntB6OO7E/d2Cu7qoaN2w= 76 | github.com/josharian/native v1.0.0 h1:Ts/E8zCSEsG17dUqv7joXJFybuMLjQfWE04tsBODTxk= 77 | github.com/josharian/native v1.0.0/go.mod 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h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ= 267 | golang.org/x/text v0.3.7 h1:olpwvP2KacW1ZWvsR7uQhoyTYvKAupfQrRGBFM352Gk= 268 | golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ= 269 | golang.org/x/time v0.0.0-20191024005414-555d28b269f0/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ= 270 | golang.org/x/time v0.0.0-20211116232009-f0f3c7e86c11 h1:GZokNIeuVkl3aZHJchRrr13WCsols02MLUcz1U9is6M= 271 | golang.org/x/time v0.0.0-20211116232009-f0f3c7e86c11/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ= 272 | golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ= 273 | golang.org/x/tools v0.0.0-20190328211700-ab21143f2384/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs= 274 | golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo= 275 | golang.org/x/tools v0.1.0/go.mod h1:xkSsbof2nBLbhDlRMhhhyNLN/zl3eTqcnHD5viDpcZ0= 276 | golang.org/x/tools v0.1.7/go.mod h1:LGqMHiF4EqQNHR1JncWGqT5BVaXmza+X+BDGol+dOxo= 277 | golang.org/x/tools v0.1.8 h1:P1HhGGuLW4aAclzjtmJdf0mJOjVUZUzOTqkAkWL+l6w= 278 | golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0= 279 | golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0= 280 | golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0= 281 | golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 h1:go1bK/D/BFZV2I8cIQd1NKEZ+0owSTG1fDTci4IqFcE= 282 | golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0= 283 | golang.zx2c4.com/wintun v0.0.0-20211104114900-415007cec224 h1:Ug9qvr1myri/zFN6xL17LSCBGFDnphBBhzmILHsM5TY= 284 | golang.zx2c4.com/wintun v0.0.0-20211104114900-415007cec224/go.mod h1:deeaetjYA+DHMHg+sMSMI58GrEteJUUzzw7en6TJQcI= 285 | golang.zx2c4.com/wireguard v0.0.0-20210905140043-2ef39d47540c/go.mod h1:laHzsbfMhGSobUmruXWAyMKKHSqvIcrqZJMyHD+/3O8= 286 | golang.zx2c4.com/wireguard v0.0.0-20211116201604-de7c702ace45 h1:mEVhdMPTuebD9IUXOUB5Q2sjZpcmzkahHWd6DrGpLHA= 287 | golang.zx2c4.com/wireguard v0.0.0-20211116201604-de7c702ace45/go.mod h1:evxZIqfCetExY5piKXGAxJYwvXWkps9zTCkWpkoGFxw= 288 | golang.zx2c4.com/wireguard/windows v0.4.10 h1:HmjzJnb+G4NCdX+sfjsQlsxGPuYaThxRbZUZFLyR0/s= 289 | golang.zx2c4.com/wireguard/windows v0.4.10/go.mod h1:v7w/8FC48tTBm1IzScDVPEEb0/GjLta+T0ybpP9UWRg= 290 | google.golang.org/protobuf v1.27.1 h1:SnqbnDw1V7RiZcXPx5MEeqPv2s79L9i7BJUlG/+RurQ= 291 | gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= 292 | gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= 293 | gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= 294 | gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY= 295 | gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM= 296 | gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b h1:h8qDotaEPuJATrMmW04NCwg7v22aHH28wwpauUhK9Oo= 297 | gvisor.dev/gvisor v0.0.0-20220126021142-d8aa030b2591 h1:acuXPUADpJMtawdLCUje9xKlQN/8utegCB/Hr/ZgEuY= 298 | gvisor.dev/gvisor v0.0.0-20220126021142-d8aa030b2591/go.mod h1:vmN0Pug/s8TJmpnt30DvrEfZ5vDl52psGLU04tFuK2U= 299 | honnef.co/go/tools v0.2.1/go.mod h1:lPVVZ2BS5TfnjLyizF7o7hv7j9/L+8cZY2hLyjP9cGY= 300 | honnef.co/go/tools v0.2.2 h1:MNh1AVMyVX23VUHE2O27jm6lNj3vjO5DexS4A1xvnzk= 301 | honnef.co/go/tools v0.2.2/go.mod h1:lPVVZ2BS5TfnjLyizF7o7hv7j9/L+8cZY2hLyjP9cGY= 302 | howett.net/plist v1.0.0 h1:7CrbWYbPPO/PyNy38b2EB/+gYbjCe2DXBxgtOOZbSQM= 303 | inet.af/netaddr v0.0.0-20211027220019-c74959edd3b6 h1:acCzuUSQ79tGsM/O50VRFySfMm19IoMKL+sZztZkCxw= 304 | inet.af/netaddr v0.0.0-20211027220019-c74959edd3b6/go.mod h1:y3MGhcFMlh0KZPMuXXow8mpjxxAk3yoDNsp4cQz54i8= 305 | nhooyr.io/websocket v1.8.7 h1:usjR2uOr/zjjkVMy0lW+PPohFok7PCow5sDjLgX4P4g= 306 | nhooyr.io/websocket v1.8.7/go.mod h1:B70DZP8IakI65RVQ51MsWP/8jndNma26DVA/nFSCgW0= 307 | software.sslmate.com/src/go-pkcs12 v0.0.0-20210415151418-c5206de65a78 h1:SqYE5+A2qvRhErbsXFfUEUmpWEKxxRSMgGLkvRAFOV4= 308 | tailscale.com v1.22.2 h1:bK0Fhu9tWcNH0qhi0Wbt+U4eHwemh2rXdTw6koa3jqI= 309 | tailscale.com v1.22.2/go.mod h1:D2zuDnjHT7v4aCt71c4+ytQUUAGpnypW+DoubYLaHjg= 310 | -------------------------------------------------------------------------------- /main.go: -------------------------------------------------------------------------------- 1 | package main 2 | 3 | import ( 4 | "context" 5 | "flag" 6 | "io" 7 | "log" 8 | "net" 9 | "os" 10 | "time" 11 | 12 | "tailscale.com/client/tailscale" 13 | "tailscale.com/tsnet" 14 | "tailscale.com/types/logger" 15 | ) 16 | 17 | var Config struct { 18 | host string 19 | port string 20 | noisy bool 21 | } 22 | 23 | // Stolem from: https://github.com/vfedoroff/go-netcat/blob/87e3e79d77ee6a0b236a784be83759a4d002a20d/main.go#L16 24 | // Handles TC connection and perform synchorinization: 25 | // TCP -> Stdout and Stdin -> TCP 26 | func tcp_con_handle(con net.Conn) { 27 | chan_to_stdout := stream_copy(con, os.Stdout) 28 | chan_to_remote := stream_copy(os.Stdin, con) 29 | select { 30 | case <-chan_to_stdout: 31 | log.Println("Remote connection is closed") 32 | case <-chan_to_remote: 33 | log.Println("Local program is terminated") 34 | } 35 | } 36 | 37 | // Stolen from: https://github.com/vfedoroff/go-netcat/blob/87e3e79d77ee6a0b236a784be83759a4d002a20d/main.go#L28 38 | // Performs copy operation between streams: os and tcp streams 39 | func stream_copy(src io.Reader, dst io.Writer) <-chan int { 40 | buf := make([]byte, 1024) 41 | sync_channel := make(chan int) 42 | go func() { 43 | defer func() { 44 | if con, ok := dst.(net.Conn); ok { 45 | con.Close() 46 | log.Printf("Connection from %v is closed\n", con.RemoteAddr()) 47 | } 48 | sync_channel <- 0 // Notify that processing is finished 49 | }() 50 | for { 51 | var nBytes int 52 | var err error 53 | nBytes, err = src.Read(buf) 54 | if err != nil { 55 | if err != io.EOF { 56 | log.Printf("Read error: %s\n", err) 57 | } 58 | break 59 | } 60 | _, err = dst.Write(buf[0:nBytes]) 61 | if err != nil { 62 | log.Fatalf("Write error: %s\n", err) 63 | } 64 | } 65 | }() 66 | return sync_channel 67 | } 68 | 69 | func newTsNetServer() tsnet.Server { 70 | hostname := os.Getenv("TS_SIDECAR_NAME") 71 | if hostname == "" { 72 | hostname = "tailscale-netcat-hack" 73 | // panic("TS_SIDECAR_NAME env var not set") 74 | } 75 | 76 | stateDir := os.Getenv("TS_STATEDIR") 77 | if stateDir == "" { 78 | stateDir = "./tsstate" 79 | } 80 | 81 | if err := os.MkdirAll(stateDir, 0o755); err != nil { 82 | panic("failed to create default state directory") 83 | } 84 | 85 | var loggerF logger.Logf 86 | 87 | if !Config.noisy { 88 | loggerF = logger.Discard 89 | } 90 | 91 | return tsnet.Server{ 92 | Dir: stateDir, 93 | Hostname: hostname, 94 | Ephemeral: true, 95 | Logf: loggerF, 96 | } 97 | } 98 | 99 | func dialAndCat(s *tsnet.Server) { 100 | ctx := context.Background() 101 | 102 | hostAndPort := Config.host + ":" + Config.port 103 | 104 | ts, err := s.Dial(ctx, "tcp", hostAndPort) 105 | if err != nil { 106 | log.Fatalln(err) 107 | } 108 | 109 | tcp_con_handle(ts) 110 | } 111 | 112 | func main() { 113 | flag.StringVar(&Config.host, "host", "", "SSH Host") 114 | flag.StringVar(&Config.port, "port", "22", "SSH Port") 115 | flag.BoolVar(&Config.noisy, "noisy", false, "Spam the console with debug messages") 116 | flag.Parse() 117 | 118 | if Config.host == "" || Config.port == "" { 119 | flag.PrintDefaults() 120 | os.Exit(1) 121 | } 122 | 123 | // Apparently this envvar needs to be set for this to work! 124 | err := os.Setenv("TAILSCALE_USE_WIP_CODE", "true") 125 | if err != nil { 126 | panic(err) 127 | } 128 | 129 | s := newTsNetServer() 130 | 131 | // s.Dial should do this but it wasnt working? 132 | s.Start() 133 | 134 | // Either this is doing something or it's enough of a race condition for Tailscale to start 135 | // before the Dial times out 136 | for i := 0; i < 60; i++ { 137 | st, err := tailscale.Status(context.Background()) 138 | if err != nil { 139 | log.Fatal(err) 140 | } 141 | 142 | if st.BackendState == "NeedsLogin" { 143 | log.Fatalf("NeedsLogin: %s\n", st.AuthURL) 144 | } 145 | 146 | if st.BackendState == "Running" { 147 | break 148 | } 149 | time.Sleep(time.Second) 150 | } 151 | 152 | dialAndCat(&s) 153 | } 154 | --------------------------------------------------------------------------------