dco: fix source IP selection when multihome

When multihome option is enabled, OpenVPN passes ipi_addr to DCO, which
is always 0.0.0.0. It should use ipi_spec_dst instead.

Signed-off-by: Qingfang Deng <dqfext@gmail.com>
Acked-by: Antonio Quartulli <a@unstable.cc>
Message-Id: <20250227032522.3734947-1-dqfext@gmail.com>
URL: https://sourceforge.net/p/openvpn/mailman/message/59154010/
Signed-off-by: Gert Doering <gert@greenie.muc.de>
(cherry picked from commit e4beaf7a610793f57984ec8006d26f9a695b0c74)

diff --git a/src/openvpn/dco.c b/src/openvpn/dco.c
index 7f0d53d3b550a6f2dfbb41a4739cc3098f40aa0b..e41d59f5a2b3c453bbf5db45cf762b0dba80f130 100644 (file)
--- a/src/openvpn/dco.c
+++ b/src/openvpn/dco.c
@@ -528,7 +528,7 @@ dco_multi_get_localaddr(struct multi_context *m, struct multi_instance *mi,
         {
             struct sockaddr_in *sock_in4 = (struct sockaddr_in *)local;
 #if defined(HAVE_IN_PKTINFO) && defined(HAVE_IPI_SPEC_DST)
-            sock_in4->sin_addr = actual->pi.in4.ipi_addr;
+            sock_in4->sin_addr = actual->pi.in4.ipi_spec_dst;
 #elif defined(IP_RECVDSTADDR)
             sock_in4->sin_addr = actual->pi.in4;
 #else