From: Amaury Denoyelle <adenoyelle@haproxy.com>
Date: Thu, 1 Dec 2022 13:51:16 +0000 (+0100)
Subject: MINOR: quic: test IP_PKTINFO support for quic-conn owned socket
X-Git-Tag: v2.8-dev1~192
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=8d46acdfcb49b4132f4a2ab7313315ca54e30ba0;p=thirdparty%2Fhaproxy.git

MINOR: quic: test IP_PKTINFO support for quic-conn owned socket

Extend the startup platform detection support test for quic-conn owned
socket. It is required to be able to retrieve destination address on a
recvfrom() system call so check if IP_PKTINFO or IP_RECVDSTADDR flags
are supported.

This change is part of quic-conn owned socket implementation.
It may be backported to 2.7 after a period of observation.
---

diff --git a/src/proto_quic.c b/src/proto_quic.c
index 003e510b64..9dd96337fe 100644
--- a/src/proto_quic.c
+++ b/src/proto_quic.c
@@ -581,6 +581,15 @@ static int quic_test_sock_per_conn_support(struct listener *l)
 	const struct receiver *rx = &l->rx;
 	int ret = 1, fdtest;
 
+	/* Check if IP destination address can be retrieved on recvfrom()
+	 * operation.
+	 */
+#if !defined(IP_PKTINFO) && !defined(IP_RECVDSTADDR)
+	ha_alert("Your platform does not seem to support UDP source address retrieval through IP_PKTINFO or an alternative flag. "
+	         "QUIC connections will use listener socket.\n");
+	ret = 0;
+#endif
+
 	/* Check if platform support multiple UDP sockets bind on the same
 	 * local address. Create a dummy socket and bind it on the same address
 	 * as <l> listener. If bind system call fails, deactivate socket per