117 lines
3.1 KiB
Go
117 lines
3.1 KiB
Go
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// Copyright (c) Tailscale Inc & AUTHORS
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// SPDX-License-Identifier: BSD-3-Clause
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package main
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import (
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"encoding/json"
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"fmt"
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"log"
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"net/http"
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"net/netip"
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"slices"
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"strings"
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"go4.org/netipx"
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)
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// See https://docs.github.com/en/authentication/keeping-your-account-and-data-secure/about-githubs-ip-addresses
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type GithubMeta struct {
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VerifiablePasswordAuthentication bool `json:"verifiable_password_authentication"`
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SSHKeyFingerprints struct {
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Sha256Ecdsa string `json:"SHA256_ECDSA"`
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Sha256Ed25519 string `json:"SHA256_ED25519"`
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Sha256Rsa string `json:"SHA256_RSA"`
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} `json:"ssh_key_fingerprints"`
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SSHKeys []string `json:"ssh_keys"`
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Hooks []string `json:"hooks"`
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Web []string `json:"web"`
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API []string `json:"api"`
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Git []string `json:"git"`
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GithubEnterpriseImporter []string `json:"github_enterprise_importer"`
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Packages []string `json:"packages"`
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Pages []string `json:"pages"`
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Importer []string `json:"importer"`
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Actions []string `json:"actions"`
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Dependabot []string `json:"dependabot"`
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Domains struct {
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Website []string `json:"website"`
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Codespaces []string `json:"codespaces"`
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Copilot []string `json:"copilot"`
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Packages []string `json:"packages"`
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} `json:"domains"`
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}
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func github() {
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r, err := http.Get("https://api.github.com/meta")
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if err != nil {
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log.Fatal(err)
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}
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var ghm GithubMeta
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if err := json.NewDecoder(r.Body).Decode(&ghm); err != nil {
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log.Fatal(err)
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}
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r.Body.Close()
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var ips netipx.IPSetBuilder
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var lists []string
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lists = append(lists, ghm.Hooks...)
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lists = append(lists, ghm.Web...)
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lists = append(lists, ghm.API...)
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lists = append(lists, ghm.Git...)
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lists = append(lists, ghm.GithubEnterpriseImporter...)
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lists = append(lists, ghm.Packages...)
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lists = append(lists, ghm.Pages...)
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lists = append(lists, ghm.Importer...)
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lists = append(lists, ghm.Actions...)
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lists = append(lists, ghm.Dependabot...)
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for _, s := range lists {
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ips.AddPrefix(netip.MustParsePrefix(s))
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}
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set, err := ips.IPSet()
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if err != nil {
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log.Fatal(err)
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}
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fmt.Println(`"routes": [`)
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for _, pfx := range set.Prefixes() {
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fmt.Printf(`"%s": ["tag:connector"],%s`, pfx.String(), "\n")
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}
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fmt.Println(`]`)
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fmt.Println()
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var domains []string
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domains = append(domains, ghm.Domains.Website...)
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domains = append(domains, ghm.Domains.Codespaces...)
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domains = append(domains, ghm.Domains.Copilot...)
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domains = append(domains, ghm.Domains.Packages...)
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slices.Sort(domains)
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domains = slices.Compact(domains)
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var bareDomains []string
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for _, domain := range domains {
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trimmed := strings.TrimPrefix(domain, "*.")
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if trimmed != domain {
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bareDomains = append(bareDomains, trimmed)
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}
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}
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domains = append(domains, bareDomains...)
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slices.Sort(domains)
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domains = slices.Compact(domains)
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fmt.Println(`"domains": [`)
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for _, domain := range domains {
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fmt.Printf(`"%s",%s`, domain, "\n")
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}
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fmt.Println(`]`)
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advertiseRoutes(set)
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}
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