From: Remi Gacogne <remi.gacogne@powerdns.com>
Date: Mon, 15 May 2023 13:32:27 +0000 (+0200)
Subject: dnsdist: Really disable REUSEADDR on outgoing UDP client sockets
X-Git-Tag: dnsdist-1.8.1~22^2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2d013627bc15a919f80ff193593813c8a7587a57;p=thirdparty%2Fpdns.git

dnsdist: Really disable REUSEADDR on outgoing UDP client sockets

It turns out that our `Socket::bind()` will _helpfully_ enable this
by default.

(cherry picked from commit 20f67fee9447069d4586a41254468ac060b2d65e)
---

diff --git a/pdns/dnsdistdist/dnsdist-healthchecks.cc b/pdns/dnsdistdist/dnsdist-healthchecks.cc
index fc831e6481..ab147cb150 100644
--- a/pdns/dnsdistdist/dnsdist-healthchecks.cc
+++ b/pdns/dnsdistdist/dnsdist-healthchecks.cc
@@ -327,7 +327,7 @@ bool queueHealthCheck(std::unique_ptr<FDMultiplexer>& mplexer, const std::shared
         SSetsockopt(sock.getHandle(), SOL_IP, IP_BIND_ADDRESS_NO_PORT, 1);
       }
 #endif
-      sock.bind(ds->d_config.sourceAddr);
+      sock.bind(ds->d_config.sourceAddr, false);
     }
 
     auto data = std::make_shared<HealthCheckData>(*mplexer, ds, std::move(checkName), checkType, checkClass, queryID);