73 lines
2 KiB
Go
73 lines
2 KiB
Go
//go:build standalone
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package checker
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import (
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"errors"
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"net"
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"net/http"
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"strings"
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"github.com/miekg/dns"
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sdk "git.happydns.org/checker-sdk-go/checker"
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)
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// RenderForm exposes a minimal form accepting either an IP address or a
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// reverse-arpa owner, plus an optional expected hostname (for FCrDNS).
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func (p *ptrProvider) RenderForm() []sdk.CheckerOptionField {
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return []sdk.CheckerOptionField{
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{
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Id: "ip",
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Type: "string",
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Label: "IP address or reverse name",
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Placeholder: "2001:db8::1 or 4.3.2.1.in-addr.arpa",
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Required: true,
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Description: "IPv4, IPv6 or fully-qualified reverse name. The checker derives one from the other automatically.",
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},
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{
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Id: "expected",
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Type: "string",
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Label: "Expected hostname",
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Placeholder: "mail.example.com",
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Description: "Optional. When set, the checker compares it to the PTR served by the reverse zone.",
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},
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}
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}
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// ParseForm turns the submitted input into a minimal CheckerOptions set
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// suitable for the Collect pipeline. We encode the inputs as a synthetic
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// svcs.PTR service so Collect's existing unmarshaller picks it up.
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func (p *ptrProvider) ParseForm(r *http.Request) (sdk.CheckerOptions, error) {
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raw := strings.TrimSpace(r.FormValue("ip"))
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if raw == "" {
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return nil, errors.New("IP address or reverse name is required")
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}
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var owner string
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if ip := net.ParseIP(raw); ip != nil {
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rev, err := dns.ReverseAddr(ip.String())
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if err != nil {
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return nil, err
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}
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owner = rev
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} else {
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owner = dns.Fqdn(raw)
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}
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expected := strings.TrimSpace(r.FormValue("expected"))
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if expected == "" {
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// Build a service payload with no declared target: the checker will
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// still do existence + FCrDNS.
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return sdk.CheckerOptions{
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"domain_name": strings.TrimSuffix(owner, "."),
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"subdomain": "@",
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}, nil
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}
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return sdk.CheckerOptions{
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"domain_name": strings.TrimSuffix(owner, "."),
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"subdomain": "@",
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"expected_target": expected,
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}, nil
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}
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