From: Michał Kępień <michal@isc.org>
Date: Sun, 29 Dec 2024 11:31:29 +0000 (+0000)
Subject: chg: nil: Improve reuse of outgoing TCP connections
X-Git-Tag: v9.21.4~11
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=dc90e977fc7ca8ee347f23cebc48dee501f8c4f9;p=thirdparty%2Fbind9.git

chg: nil: Improve reuse of outgoing TCP connections

This MR is a prerequisite for !8348.

It intentionally does not have a changelog entry associated with it, to
prevent making a false impression of improving connection reuse **for
existing code**.  It will only make a difference once !8348 gets merged
(and even then, only if the new `ISC_SOCKET_DETAILS` macro will be set
during build).  That's because `isc_nmhandle_localaddr()` currently
simply returns `handle->local` and its return value will only be set to
the actual address the socket is bound to with !8348 in place.

Note that `dns_dispatch_gettcp()` is currently only used by the
`dns_request` API, so this MR's potential for introducing new breakage
is relatively low.

Closes #4693

Merge branch '4693-improve-reuse-of-outgoing-tcp-connections' into 'main'

See merge request isc-projects/bind9!8972
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