From: Miroslav Lichvar <mlichvar@redhat.com>
Date: Mon, 5 Oct 2020 07:58:31 +0000 (+0200)
Subject: cmdmon: fix link-local address check
X-Git-Tag: 4.0~13
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5d60d611ae63590cfafd6aa0e0501a24171f396c;p=thirdparty%2Fchrony.git

cmdmon: fix link-local address check

Don't check for a link-local address on path of a Unix domain socket.

Fixes: 4e747da4b482 ("ntp+cmdmon: fix responding to link-local addresses")
---

diff --git a/cmdmon.c b/cmdmon.c
index a7a6a58f..c17db0cb 100644
--- a/cmdmon.c
+++ b/cmdmon.c
@@ -306,7 +306,8 @@ transmit_reply(int sock_fd, int request_length, SCK_Message *message)
 
   /* Don't require responses to non-link-local addresses to use the same
      interface */
-  if (!SCK_IsLinkLocalIPAddress(&message->remote_addr.ip.ip_addr))
+  if (message->addr_type == SCK_ADDR_IP &&
+      !SCK_IsLinkLocalIPAddress(&message->remote_addr.ip.ip_addr))
     message->if_index = INVALID_IF_INDEX;
 
   if (!SCK_SendMessage(sock_fd, message, 0))