Mercurial > hg > nginx
view conf/koi-win @ 8913:40445fc7c403 quic
QUIC: fixed migration during NAT rebinding.
The RFC 9000 allows a packet from known CID arrive from unknown path:
These requirements regarding connection ID reuse apply only to the
sending of packets, as unintentional changes in path without a change
in connection ID are possible. For example, after a period of
network inactivity, NAT rebinding might cause packets to be sent on a
new path when the client resumes sending.
Before the patch, such packets were rejected with an error in the
ngx_quic_check_migration() function. Removing the check makes the
separate function excessive - remaining checks are early migration
check and "disable_active_migration" check. The latter is a transport
parameter sent to client and it should not be used by server.
The server should send "disable_active_migration" "if the endpoint does
not support active connection migration" (18.2). The support status depends
on nginx configuration: to have migration working with multiple workers,
you need bpf helper, available on recent Linux systems. The patch does
not set "disable_active_migration" automatically and leaves it for the
administrator. By default, active migration is enabled.
RFC 900 says that it is ok to migrate if the peer violates
"disable_active_migration" flag requirements:
If the peer violates this requirement,
the endpoint MUST either drop the incoming packets on that path without
generating a Stateless Reset
OR
proceed with path validation and allow the peer to migrate. Generating a
Stateless Reset or closing the connection would allow third parties in the
network to cause connections to close by spoofing or otherwise manipulating
observed traffic.
So, nginx adheres to the second option and proceeds to path validation.
Note:
The ngtcp2 may be used for testing both active migration and NAT rebinding:
ngtcp2/client --change-local-addr=200ms --delay-stream=500ms <ip> <port> <url>
ngtcp2/client --change-local-addr=200ms --delay-stream=500ms --nat-rebinding \
<ip> <port> <url>
author | Vladimir Homutov <vl@nginx.com> |
---|---|
date | Mon, 29 Nov 2021 11:51:14 +0300 |
parents | 400711951595 |
children |
line wrap: on
line source
charset_map koi8-r windows-1251 { 80 88 ; # euro 95 95 ; # bullet 9A A0 ; # 9E B7 ; # · A3 B8 ; # small yo A4 BA ; # small Ukrainian ye A6 B3 ; # small Ukrainian i A7 BF ; # small Ukrainian yi AD B4 ; # small Ukrainian soft g AE A2 ; # small Byelorussian short u B0 B0 ; # ° B3 A8 ; # capital YO B4 AA ; # capital Ukrainian YE B6 B2 ; # capital Ukrainian I B7 AF ; # capital Ukrainian YI B9 B9 ; # numero sign BD A5 ; # capital Ukrainian soft G BE A1 ; # capital Byelorussian short U BF A9 ; # (C) C0 FE ; # small yu C1 E0 ; # small a C2 E1 ; # small b C3 F6 ; # small ts C4 E4 ; # small d C5 E5 ; # small ye C6 F4 ; # small f C7 E3 ; # small g C8 F5 ; # small kh C9 E8 ; # small i CA E9 ; # small j CB EA ; # small k CC EB ; # small l CD EC ; # small m CE ED ; # small n CF EE ; # small o D0 EF ; # small p D1 FF ; # small ya D2 F0 ; # small r D3 F1 ; # small s D4 F2 ; # small t D5 F3 ; # small u D6 E6 ; # small zh D7 E2 ; # small v D8 FC ; # small soft sign D9 FB ; # small y DA E7 ; # small z DB F8 ; # small sh DC FD ; # small e DD F9 ; # small shch DE F7 ; # small ch DF FA ; # small hard sign E0 DE ; # capital YU E1 C0 ; # capital A E2 C1 ; # capital B E3 D6 ; # capital TS E4 C4 ; # capital D E5 C5 ; # capital YE E6 D4 ; # capital F E7 C3 ; # capital G E8 D5 ; # capital KH E9 C8 ; # capital I EA C9 ; # capital J EB CA ; # capital K EC CB ; # capital L ED CC ; # capital M EE CD ; # capital N EF CE ; # capital O F0 CF ; # capital P F1 DF ; # capital YA F2 D0 ; # capital R F3 D1 ; # capital S F4 D2 ; # capital T F5 D3 ; # capital U F6 C6 ; # capital ZH F7 C2 ; # capital V F8 DC ; # capital soft sign F9 DB ; # capital Y FA C7 ; # capital Z FB D8 ; # capital SH FC DD ; # capital E FD D9 ; # capital SHCH FE D7 ; # capital CH FF DA ; # capital hard sign }