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If we receive a response it must have the exact same msgid as the last

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request we sent, so make sure they match exactly rather than allowing
higher msgids.
We can't handle out of order responses and if we don't receive a response
in time we retransmit our request until we get one or run into a timeout.

Found by Dirk Loss
ok markus@ hshoexer@
This commit is contained in:
tobhe
2026-04-01 19:04:22 +00:00
parent 0ea06f527d
commit 3eaa2c8301
1 changed files with 2 additions and 2 deletions
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4
sbin/iked/ikev2.c
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@@ -1,4 +1,4 @@
/* $OpenBSD: ikev2.c,v 1.396 2026/04/01 18:36:49 tobhe Exp $ */
/* $OpenBSD: ikev2.c,v 1.397 2026/04/01 19:04:22 tobhe Exp $ */
/*
* Copyright (c) 2019 Tobias Heider <tobias.heider@stusta.de>
@@ -713,7 +713,7 @@ ikev2_recv(struct iked *env, struct iked_message *msg)
}
if (msg->msg_response) {
if (msg->msg_msgid > sa->sa_reqid) {
if (msg->msg_msgid + 1 != sa->sa_reqid) {
ikestat_inc(env, ikes_msg_rcvd_dropped);
return;
}