diff options
| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 06:14:41 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 06:14:41 +0000 |
| commit | 549a391d6438e828001eeeaf235b080c054a7bf3 (patch) | |
| tree | 1bb6b1ea5987fa167a1d13abe82209cc882dd94b /doc/srv-records-support.md | |
| parent | Initial commit. (diff) | |
| download | apt-2c45e52304424337d0e4827338ff0036040e68f1.tar.xz apt-2c45e52304424337d0e4827338ff0036040e68f1.zip | |
Adding upstream version 2.2.4.upstream/2.2.4upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'doc/srv-records-support.md')
| -rw-r--r-- | doc/srv-records-support.md | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/doc/srv-records-support.md b/doc/srv-records-support.md new file mode 100644 index 0000000..004811c --- /dev/null +++ b/doc/srv-records-support.md @@ -0,0 +1,22 @@ +DNS SRV record support in apt +============================= + +Apt supports a subset of the DNS SRV server records protocol as +described in [RFC 2782](https://tools.ietf.org/html/rfc2782) for service discovery. + +Before connecting to the requested server APT will send a SRV +record request of the form `_$protocol._tcp._$host`, e.g. +`_http._tcp.ftp.debian.org` or `_http._tcp.security.debian.org`. + +If the server sends SRV records +as a reply APT will use those to connect to the server(s) in +this reply. It will honor the `priority` field in the reply. + +However it does not implement the `weight` algorithm as described +in RFC 2782. It will use an equal weight for each server of the +same priority. + +If connecting to a server fails APT will retry with the next one +and remove the server from the list of valid servers for this +session. + |