secondary server, mirage layer #347
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If there's a (Dns_server.Secondary.)timer-triggered connection request, do not infinitely try to connect (via request -> fail -> close -> request) in a tight loop, but cancel on first sight (the timer is responsible for re-connecting)
reynir
approved these changes
Nov 28, 2023
|
I think the entire dns_server_mirage and dns_mirage logic may need an overhaul with a view on when which failures may arise, and how to properly handle them (to avoid such tight loops). maybe |
reynir
reviewed
Nov 28, 2023
reynir
approved these changes
Nov 30, 2023
|
I think this improves the situation so I will merge. If there are unintended effects we can revisit. |
hannesm
added a commit
to hannesm/opam-repository
that referenced
this pull request
May 29, 2024
CHANGES:
* dns-client (lwt, mirage): depend on happy-eyeballs-{lwt,mirage} instead of
duplicating the code. This requires happy-eyeballs 1.1.0, and now the same
Happy_eyeballs_{lwt,mirage}.t is used for DNS (connecting to the nameserver)
and for the application (connecting to a remote host)
(@dinosaure @hannesm mirage/ocaml-dns#346)
* server: improve API documentation (@hannesm
1a80bd4080e597687152cf351d035ef5f00c5946
000ae02dfc477d91c05891e3891a447328ae448a)
* server: add a `packet_callback` to `handle_packet` and `handle_buf`
(@RyanGibb mirage/ocaml-dns#349)
* server: expose `update_data` (@RyanGibb mirage/ocaml-dns#350)
* resolver: b root name server IP change (@hannesm mirage/ocaml-dns#348)
* secondary server [mirage]: avoid infinite loop in connect (avoids SYN floods)
(@hannesm @reynir mirage/ocaml-dns#347)
* resolver, dns_zone: use consistently `Log` instead of `Logs` (@palainp mirage/ocaml-dns#342)
avsm
pushed a commit
to avsm/opam-repository
that referenced
this pull request
Sep 5, 2024
CHANGES:
* dns-client (lwt, mirage): depend on happy-eyeballs-{lwt,mirage} instead of
duplicating the code. This requires happy-eyeballs 1.1.0, and now the same
Happy_eyeballs_{lwt,mirage}.t is used for DNS (connecting to the nameserver)
and for the application (connecting to a remote host)
(@dinosaure @hannesm mirage/ocaml-dns#346)
* server: improve API documentation (@hannesm
1a80bd4080e597687152cf351d035ef5f00c5946
000ae02dfc477d91c05891e3891a447328ae448a)
* server: add a `packet_callback` to `handle_packet` and `handle_buf`
(@RyanGibb mirage/ocaml-dns#349)
* server: expose `update_data` (@RyanGibb mirage/ocaml-dns#350)
* resolver: b root name server IP change (@hannesm mirage/ocaml-dns#348)
* secondary server [mirage]: avoid infinite loop in connect (avoids SYN floods)
(@hannesm @reynir mirage/ocaml-dns#347)
* resolver, dns_zone: use consistently `Log` instead of `Logs` (@palainp mirage/ocaml-dns#342)
RyanGibb
added a commit
to RyanGibb/ocaml-dns
that referenced
this pull request
Nov 18, 2024
Release 8.0.0
CHANGES:
* dns-client (lwt, mirage): depend on happy-eyeballs-{lwt,mirage} instead of
duplicating the code. This requires happy-eyeballs 1.1.0, and now the same
Happy_eyeballs_{lwt,mirage}.t is used for DNS (connecting to the nameserver)
and for the application (connecting to a remote host)
(@dinosaure @hannesm mirage#346)
* server: improve API documentation (@hannesm
1a80bd4
000ae02)
* server: add a `packet_callback` to `handle_packet` and `handle_buf`
(@RyanGibb mirage#349)
* server: expose `update_data` (@RyanGibb mirage#350)
* resolver: b root name server IP change (@hannesm mirage#348)
* secondary server [mirage]: avoid infinite loop in connect (avoids SYN floods)
(@hannesm @reynir mirage#347)
* resolver, dns_zone: use consistently `Log` instead of `Logs` (@palainp mirage#342)
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If there's a (Dns_server.Secondary.)timer-triggered connection request, do not infinitely try to connect (via request -> fail -> close -> request) in a tight loop, but cancel on first sight (the timer is responsible for re-connecting)
I'm in the process of testing this in production.