Tailscale Peer Info

README.md

This is a quick little program that gathers some info about Tailscale peers that isn't readily available from the usual CLI tools.

go.mod

module tailscale-peer-info

go 1.21.3

require tailscale.com v1.50.1

require (
	filippo.io/edwards25519 v1.0.0 // indirect
	github.com/Microsoft/go-winio v0.6.1 // indirect
	github.com/akutz/memconn v0.1.0 // indirect
	github.com/alexbrainman/sspi v0.0.0-20210105120005-909beea2cc74 // indirect
	github.com/dblohm7/wingoes v0.0.0-20230821191801-fc76608aecf0 // indirect
	github.com/fxamacker/cbor/v2 v2.4.0 // indirect
	github.com/google/go-cmp v0.5.9 // indirect
	github.com/hdevalence/ed25519consensus v0.1.0 // indirect
	github.com/josharian/native v1.1.1-0.20230202152459-5c7d0dd6ab86 // indirect
	github.com/jsimonetti/rtnetlink v1.3.2 // indirect
	github.com/mdlayher/netlink v1.7.2 // indirect
	github.com/mdlayher/socket v0.4.1 // indirect
	github.com/mitchellh/go-ps v1.0.0 // indirect
	github.com/x448/float16 v0.8.4 // indirect
	go4.org/mem v0.0.0-20220726221520-4f986261bf13 // indirect
	go4.org/netipx v0.0.0-20230728180743-ad4cb58a6516 // indirect
	golang.org/x/crypto v0.12.0 // indirect
	golang.org/x/exp v0.0.0-20230725093048-515e97ebf090 // indirect
	golang.org/x/mod v0.11.0 // indirect
	golang.org/x/net v0.14.0 // indirect
	golang.org/x/sync v0.2.0 // indirect
	golang.org/x/sys v0.11.0 // indirect
	golang.org/x/text v0.12.0 // indirect
	golang.org/x/tools v0.9.1 // indirect
	golang.zx2c4.com/wireguard/windows v0.5.3 // indirect
)

go.sum

filippo.io/edwards25519 v1.0.0 h1:0wAIcmJUqRdI8IJ/3eGi5/HwXZWPujYXXlkrQogz0Ek=
filippo.io/edwards25519 v1.0.0/go.mod h1:N1IkdkCkiLB6tki+MYJoSx2JTY9NUlxZE7eHn5EwJns=
github.com/Microsoft/go-winio v0.6.1 h1:9/kr64B9VUZrLm5YYwbGtUJnMgqWVOdUAXu6Migciow=
github.com/Microsoft/go-winio v0.6.1/go.mod h1:LRdKpFKfdobln8UmuiYcKPot9D2v6svN5+sAH+4kjUM=
github.com/akutz/memconn v0.1.0 h1:NawI0TORU4hcOMsMr11g7vwlCdkYeLKXBcxWu2W/P8A=
github.com/akutz/memconn v0.1.0/go.mod h1:Jo8rI7m0NieZyLI5e2CDlRdRqRRB4S7Xp77ukDjH+Fw=
github.com/alexbrainman/sspi v0.0.0-20210105120005-909beea2cc74 h1:Kk6a4nehpJ3UuJRqlA3JxYxBZEqCeOmATOvrbT4p9RA=
github.com/alexbrainman/sspi v0.0.0-20210105120005-909beea2cc74/go.mod h1:cEWa1LVoE5KvSD9ONXsZrj0z6KqySlCCNKHlLzbqAt4=
github.com/cilium/ebpf v0.10.0 h1:nk5HPMeoBXtOzbkZBWym+ZWq1GIiHUsBFXxwewXAHLQ=
github.com/cilium/ebpf v0.10.0/go.mod h1:DPiVdY/kT534dgc9ERmvP8mWA+9gvwgKfRvk4nNWnoE=
github.com/dblohm7/wingoes v0.0.0-20230821191801-fc76608aecf0 h1:/dgKwHVTI0J+A0zd/BHOF2CTn1deN0735cJrb+w2hbE=
github.com/dblohm7/wingoes v0.0.0-20230821191801-fc76608aecf0/go.mod h1:6NCrWM5jRefaG7iN0iMShPalLsljHWBh9v1zxM2f8Xs=
github.com/frankban/quicktest v1.14.5 h1:dfYrrRyLtiqT9GyKXgdh+k4inNeTvmGbuSgZ3lx3GhA=
github.com/frankban/quicktest v1.14.5/go.mod h1:4ptaffx2x8+WTWXmUCuVU6aPUX1/Mz7zb5vbUoiM6w0=
github.com/fxamacker/cbor/v2 v2.4.0 h1:ri0ArlOR+5XunOP8CRUowT0pSJOwhW098ZCUyskZD88=
github.com/fxamacker/cbor/v2 v2.4.0/go.mod h1:TA1xS00nchWmaBnEIxPSE5oHLuJBAVvqrtAnWBwBCVo=
github.com/google/go-cmp v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38=
github.com/google/go-cmp v0.5.9/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
github.com/hdevalence/ed25519consensus v0.1.0 h1:jtBwzzcHuTmFrQN6xQZn6CQEO/V9f7HsjsjeEZ6auqU=
github.com/hdevalence/ed25519consensus v0.1.0/go.mod h1:w3BHWjwJbFU29IRHL1Iqkw3sus+7FctEyM4RqDxYNzo=
github.com/josharian/native v1.1.1-0.20230202152459-5c7d0dd6ab86 h1:elKwZS1OcdQ0WwEDBeqxKwb7WB62QX8bvZ/FJnVXIfk=
github.com/josharian/native v1.1.1-0.20230202152459-5c7d0dd6ab86/go.mod h1:aFAMtuldEgx/4q7iSGazk22+IcgvtiC+HIimFO9XlS8=
github.com/jsimonetti/rtnetlink v1.3.2 h1:dcn0uWkfxycEEyNy0IGfx3GrhQ38LH7odjxAghimsVI=
github.com/jsimonetti/rtnetlink v1.3.2/go.mod h1:BBu4jZCpTjP6Gk0/wfrO8qcqymnN3g0hoFqObRmUo6U=
github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
github.com/kr/pretty v0.3.1/go.mod h1:hoEshYVHaxMs3cyo3Yncou5ZscifuDolrwPKZanG3xk=
github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
github.com/mdlayher/netlink v1.7.2 h1:/UtM3ofJap7Vl4QWCPDGXY8d3GIY2UGSDbK+QWmY8/g=
github.com/mdlayher/netlink v1.7.2/go.mod h1:xraEF7uJbxLhc5fpHL4cPe221LI2bdttWlU+ZGLfQSw=
github.com/mdlayher/socket v0.4.1 h1:eM9y2/jlbs1M615oshPQOHZzj6R6wMT7bX5NPiQvn2U=
github.com/mdlayher/socket v0.4.1/go.mod h1:cAqeGjoufqdxWkD7DkpyS+wcefOtmu5OQ8KuoJGIReA=
github.com/mitchellh/go-ps v1.0.0 h1:i6ampVEEF4wQFF+bkYfwYgY+F/uYJDktmvLPf7qIgjc=
github.com/mitchellh/go-ps v1.0.0/go.mod h1:J4lOc8z8yJs6vUwklHw2XEIiT4z4C40KtWVN3nvg8Pg=
github.com/rogpeppe/go-internal v1.10.0 h1:TMyTOH3F/DB16zRVcYyreMH6GnZZrwQVAoYjRBZyWFQ=
github.com/rogpeppe/go-internal v1.10.0/go.mod h1:UQnix2H7Ngw/k4C5ijL5+65zddjncjaFoBhdsK/akog=
github.com/x448/float16 v0.8.4 h1:qLwI1I70+NjRFUR3zs1JPUCgaCXSh3SW62uAKT1mSBM=
github.com/x448/float16 v0.8.4/go.mod h1:14CWIYCyZA/cWjXOioeEpHeN/83MdbZDRQHoFcYsOfg=
go4.org/mem v0.0.0-20220726221520-4f986261bf13 h1:CbZeCBZ0aZj8EfVgnqQcYZgf0lpZ3H9rmp5nkDTAst8=
go4.org/mem v0.0.0-20220726221520-4f986261bf13/go.mod h1:reUoABIJ9ikfM5sgtSF3Wushcza7+WeD01VB9Lirh3g=
go4.org/netipx v0.0.0-20230728180743-ad4cb58a6516 h1:X66ZEoMN2SuaoI/dfZVYobB6E5zjZyyHUMWlCA7MgGE=
go4.org/netipx v0.0.0-20230728180743-ad4cb58a6516/go.mod h1:TQvodOM+hJTioNQJilmLXu08JNb8i+ccq418+KWu1/Y=
golang.org/x/crypto v0.12.0 h1:tFM/ta59kqch6LlvYnPa0yx5a83cL2nHflFhYKvv9Yk=
golang.org/x/crypto v0.12.0/go.mod h1:NF0Gs7EO5K4qLn+Ylc+fih8BSTeIjAP05siRnAh98yw=
golang.org/x/exp v0.0.0-20230725093048-515e97ebf090 h1:Di6/M8l0O2lCLc6VVRWhgCiApHV8MnQurBnFSHsQtNY=
golang.org/x/exp v0.0.0-20230725093048-515e97ebf090/go.mod h1:FXUEEKJgO7OQYeo8N01OfiKP8RXMtf6e8aTskBGqWdc=
golang.org/x/mod v0.11.0 h1:bUO06HqtnRcc/7l71XBe4WcqTZ+3AH1J59zWDDwLKgU=
golang.org/x/mod v0.11.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
golang.org/x/net v0.14.0 h1:BONx9s002vGdD9umnlX1Po8vOZmrgH34qlHcD1MfK14=
golang.org/x/net v0.14.0/go.mod h1:PpSgVXXLK0OxS0F31C1/tv6XNguvCrnXIDrFMspZIUI=
golang.org/x/sync v0.2.0 h1:PUR+T4wwASmuSTYdKjYHI5TD22Wy5ogLU5qZCOLxBrI=
golang.org/x/sync v0.2.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sys v0.4.1-0.20230131160137-e7d7f63158de/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.11.0 h1:eG7RXZHdqOJ1i+0lgLgCpSXAp6M3LYlAo6osgSi0xOM=
golang.org/x/sys v0.11.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/text v0.12.0 h1:k+n5B8goJNdU7hSvEtMUz3d1Q6D/XW4COJSJR6fN0mc=
golang.org/x/text v0.12.0/go.mod h1:TvPlkZtksWOMsz7fbANvkp4WM8x/WCo/om8BMLbz+aE=
golang.org/x/tools v0.9.1 h1:8WMNJAz3zrtPmnYC7ISf5dEn3MT0gY7jBJfw27yrrLo=
golang.org/x/tools v0.9.1/go.mod h1:owI94Op576fPu3cIGQeHs3joujW/2Oc6MtlxbF5dfNc=
golang.zx2c4.com/wireguard/windows v0.5.3 h1:On6j2Rpn3OEMXqBq00QEDC7bWSZrPIHKIus8eIuExIE=
golang.zx2c4.com/wireguard/windows v0.5.3/go.mod h1:9TEe8TJmtwyQebdFwAkEWOPr3prrtqm+REGFifP60hI=
tailscale.com v1.50.1 h1:q3lwxT2Y2ezc+FBCMHP8M14cgu1V0JiuLikojdsXuGU=
tailscale.com v1.50.1/go.mod h1:lBw7+Mw2d7rea3kefGjYWN8IJkB5dyaakMNMOinNGDo=

info.go

package main

import (
	"context"
	"fmt"

	"tailscale.com/client/tailscale"
)

func main() {
	var client tailscale.LocalClient
	status, err := client.Status(context.Background())
	if err != nil {
		panic(err)
	}
	for _, peer := range status.Peer {
		fmt.Printf("%v\n", peer.HostName)
		fmt.Printf("\tDNSName: %v\n", peer.DNSName)
		fmt.Printf("\tShareeNode: %v\n", peer.ShareeNode)
		if peer.Tags != nil {
			fmt.Printf("\tTags:\n")
			for _, tag := range peer.Tags.AsSlice() {
				fmt.Printf("\t\t%q\n", tag)
			}
		}
		if len(peer.Capabilities) != 0 {
			fmt.Printf("\tCapabilities:\n")
			for _, c := range peer.Capabilities {
				fmt.Printf("\t\t%q\n", c)
			}
		}
		fmt.Println()
	}
}