From 76e2632459410dec81337edb6a9fee33c9a660f3 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 13 Apr 2024 11:59:37 +0200 Subject: Adding upstream version 2.7.12. Signed-off-by: Daniel Baumann --- doc/srv-records-support.md | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) create mode 100644 doc/srv-records-support.md (limited to 'doc/srv-records-support.md') 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. + -- cgit v1.2.3