Pierre-Olivier Mercier
90f1b4943f
Generic SRV records checker for happyDomain.
For each SRV record attached to an svcs.UnknownSRV service, the checker
resolves every target and probes reachability:
- DNS resolution (A/AAAA), CNAME detection (RFC 2782 violation),
null-target detection (RFC 2782 "service explicitly unavailable")
- TCP connect to target:port for _tcp SRVs
- UDP probe for _udp SRVs, using ICMP port-unreachable detection
The checker also publishes TLS endpoints (host, port, SNI) for every
SRV target hitting a well-known direct-TLS port (443, 465, 636, 853,
993, 995, 5061, 5223, …) via the EndpointDiscoverer SDK interface, so
a downstream TLS checker can pick them up.
The HTML report groups records as cards and surfaces the most common
failure scenarios (DNS failure, CNAME target, TCP unreachable,
null-target) at the top with remediation guidance.
45 lines
1.4 KiB
Go
45 lines
1.4 KiB
Go
// This file is part of the happyDomain (R) project.
|
|
// Copyright (c) 2020-2026 happyDomain
|
|
// Authors: Pierre-Olivier Mercier, et al.
|
|
//
|
|
// This program is offered under a commercial and under the AGPL license.
|
|
// For commercial licensing, contact us at <contact@happydomain.org>.
|
|
//
|
|
// For AGPL licensing:
|
|
// This program is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Affero General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// This program is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU Affero General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Affero General Public License
|
|
// along with this program. If not, see <https://www.gnu.org/licenses/>.
|
|
|
|
// Command checker-srv is the standalone binary for the SRV checker.
|
|
package main
|
|
|
|
import (
|
|
"flag"
|
|
"log"
|
|
|
|
"git.happydns.org/checker-sdk-go/checker/server"
|
|
srv "git.happydns.org/checker-srv/checker"
|
|
)
|
|
|
|
var Version = "custom-build"
|
|
|
|
var listenAddr = flag.String("listen", ":8080", "HTTP listen address")
|
|
|
|
func main() {
|
|
flag.Parse()
|
|
srv.Version = Version
|
|
|
|
httpSrv := server.New(srv.Provider())
|
|
if err := httpSrv.ListenAndServe(*listenAddr); err != nil {
|
|
log.Fatalf("server error: %v", err)
|
|
}
|
|
}
|