From: David Lamparter <david@opensourcerouting.org>
Date: Wed, 27 Jul 2016 18:02:54 +0000 (+0200)
Subject: pimd: supply VIFF_USE_IFINDEX definition
X-Git-Tag: frr-2.0-rc1~444
X-Git-Url: https://git.puffer.fish/?a=commitdiff_plain;h=e62d0e2535b46e3eb6887b2276278c5c468b4731;p=mirror%2Ffrr.git

pimd: supply VIFF_USE_IFINDEX definition

This fixes compilation if the system libc doesn't have VIFF_USE_IFINDEX.
It'll still break runtime if the kernel is older than 2.6.32.

Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
---

diff --git a/pimd/pim_iface.c b/pimd/pim_iface.c
index 1dfbd9990a..14c8c7262e 100644
--- a/pimd/pim_iface.c
+++ b/pimd/pim_iface.c
@@ -41,6 +41,19 @@
 #include "pim_time.h"
 #include "pim_ssmpingd.h"
 
+#ifndef VIFF_USE_IFINDEX
+# ifdef linux
+/* make it work compile-time - whether it works runtime depends on the user
+ * having 2.6.32 or newer */
+#  define VIFF_USE_IFINDEX        0x8
+# else
+#  error no VIFF_USE_IFINDEX on this system, code needs porting
+/* NB: without VIFF_USE_IFINDEX, the local IP address is used to identify
+ * interfaces, which means it's impossible to support multiple interfaces that
+ * have the same or no IP address (e.g. unnumbered) */
+# endif
+#endif
+
 struct interface *pim_regiface = NULL;
 
 static void pim_if_igmp_join_del_all(struct interface *ifp);