|
| 1 | +package nextdns |
| 2 | + |
| 3 | +import ( |
| 4 | + "context" |
| 5 | + "encoding/json" |
| 6 | + "fmt" |
| 7 | + "net/http" |
| 8 | + "net/netip" |
| 9 | + "net/url" |
| 10 | + "regexp" |
| 11 | + "strings" |
| 12 | + |
| 13 | + "github.com/qdm12/ddns-updater/internal/models" |
| 14 | + "github.com/qdm12/ddns-updater/internal/provider/constants" |
| 15 | + "github.com/qdm12/ddns-updater/internal/provider/errors" |
| 16 | + "github.com/qdm12/ddns-updater/internal/provider/utils" |
| 17 | + "github.com/qdm12/ddns-updater/pkg/publicip/ipversion" |
| 18 | +) |
| 19 | + |
| 20 | +type Provider struct { |
| 21 | + domain string |
| 22 | + owner string |
| 23 | + ipVersion ipversion.IPVersion |
| 24 | + ipv6Suffix netip.Prefix |
| 25 | + endpoint string |
| 26 | +} |
| 27 | + |
| 28 | +func New(data json.RawMessage, domain, owner string, |
| 29 | + ipVersion ipversion.IPVersion, ipv6Suffix netip.Prefix) ( |
| 30 | + provider *Provider, err error, |
| 31 | +) { |
| 32 | + if owner == "link-ip" || domain == "" { |
| 33 | + domain = "link-ip.nextdns.io" |
| 34 | + owner = "@" |
| 35 | + } |
| 36 | + var providerSpecificSettings struct { |
| 37 | + Endpoint string `json:"endpoint"` |
| 38 | + } |
| 39 | + err = json.Unmarshal(data, &providerSpecificSettings) |
| 40 | + if err != nil { |
| 41 | + return nil, fmt.Errorf("json decoding provider specific settings: %w", err) |
| 42 | + } |
| 43 | + |
| 44 | + err = validateSettings(domain, owner, providerSpecificSettings.Endpoint) |
| 45 | + if err != nil { |
| 46 | + return nil, fmt.Errorf("validating provider specific settings: %w", err) |
| 47 | + } |
| 48 | + |
| 49 | + return &Provider{ |
| 50 | + domain: domain, |
| 51 | + owner: owner, |
| 52 | + ipVersion: ipVersion, |
| 53 | + ipv6Suffix: ipv6Suffix, |
| 54 | + endpoint: providerSpecificSettings.Endpoint, |
| 55 | + }, nil |
| 56 | +} |
| 57 | + |
| 58 | +var ( |
| 59 | + endpointRegex = regexp.MustCompile(`^[0-9a-fA-F]{6}\/[0-9a-fA-F]{16}$`) |
| 60 | +) |
| 61 | + |
| 62 | +func validateSettings(domain, owner, endpoint string) (err error) { |
| 63 | + err = utils.CheckDomain(domain) |
| 64 | + if err != nil { |
| 65 | + return fmt.Errorf("%w: %w", errors.ErrDomainNotValid, err) |
| 66 | + } |
| 67 | + switch { |
| 68 | + case !strings.HasSuffix(domain, "nextdns.io"): |
| 69 | + return fmt.Errorf(`%w: %q must end with "%s"`, |
| 70 | + errors.ErrDomainNotValid, domain, "nextdns.io") |
| 71 | + case owner == "*": |
| 72 | + return fmt.Errorf("%w: %s", errors.ErrOwnerWildcard, owner) |
| 73 | + case !endpointRegex.MatchString(endpoint): |
| 74 | + return fmt.Errorf("%w: endpoint %q does not match regex %q", |
| 75 | + errors.ErrTokenNotValid, endpoint, endpointRegex) |
| 76 | + } |
| 77 | + return nil |
| 78 | +} |
| 79 | + |
| 80 | +func (p *Provider) String() string { |
| 81 | + return utils.ToString(p.domain, p.owner, constants.NextDNS, p.ipVersion) |
| 82 | +} |
| 83 | + |
| 84 | +func (p *Provider) Domain() string { |
| 85 | + return p.domain |
| 86 | +} |
| 87 | + |
| 88 | +func (p *Provider) Owner() string { |
| 89 | + return p.owner |
| 90 | +} |
| 91 | + |
| 92 | +func (p *Provider) IPVersion() ipversion.IPVersion { |
| 93 | + return p.ipVersion |
| 94 | +} |
| 95 | + |
| 96 | +func (p *Provider) IPv6Suffix() netip.Prefix { |
| 97 | + return p.ipv6Suffix |
| 98 | +} |
| 99 | + |
| 100 | +func (p *Provider) Proxied() bool { |
| 101 | + return false |
| 102 | +} |
| 103 | + |
| 104 | +func (p *Provider) BuildDomainName() string { |
| 105 | + return utils.BuildDomainName(p.owner, p.domain) |
| 106 | +} |
| 107 | + |
| 108 | +func (p *Provider) HTML() models.HTMLRow { |
| 109 | + return models.HTMLRow{ |
| 110 | + Domain: fmt.Sprintf("<a href=\"http://%s\">%s</a>", p.BuildDomainName(), p.BuildDomainName()), |
| 111 | + Owner: p.Owner(), |
| 112 | + Provider: "<a href=\"https://nextdns.io/\">NextDNS</a>", |
| 113 | + IPVersion: p.ipVersion.String(), |
| 114 | + } |
| 115 | +} |
| 116 | + |
| 117 | +func (p *Provider) Update(ctx context.Context, client *http.Client, ip netip.Addr) (newIP netip.Addr, err error) { |
| 118 | + u := url.URL{ |
| 119 | + Scheme: "https", |
| 120 | + Host: p.Domain(), |
| 121 | + Path: p.endpoint, |
| 122 | + } |
| 123 | + request, err := http.NewRequestWithContext(ctx, http.MethodGet, u.String(), nil) |
| 124 | + if err != nil { |
| 125 | + return netip.Addr{}, fmt.Errorf("creating http request: %w", err) |
| 126 | + } |
| 127 | + |
| 128 | + response, err := client.Do(request) |
| 129 | + if err != nil { |
| 130 | + return netip.Addr{}, err |
| 131 | + } |
| 132 | + defer response.Body.Close() |
| 133 | + |
| 134 | + s, err := utils.ReadAndCleanBody(response.Body) |
| 135 | + if err != nil { |
| 136 | + return netip.Addr{}, fmt.Errorf("reading response: %w", err) |
| 137 | + } |
| 138 | + |
| 139 | + if response.StatusCode != http.StatusOK { |
| 140 | + return netip.Addr{}, fmt.Errorf("%w: %d: %s", |
| 141 | + errors.ErrHTTPStatusNotValid, response.StatusCode, utils.ToSingleLine(s)) |
| 142 | + } |
| 143 | + return ip, nil |
| 144 | +} |
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