From: Roy Marples <roy@marples.name>
Date: Sat, 16 Nov 2013 11:55:27 +0000 (+0000)
Subject: Linux has had address loopback routes since 2.2
X-Git-Tag: v6.2.0~48
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5d0b7b9fddf39b2f5c5347525a12e183f8d8c2ee;p=thirdparty%2Fdhcpcd.git

Linux has had address loopback routes since 2.2
I can't find an easy test for this, so just skip it.
---

diff --git a/ipv4.c b/ipv4.c
index b5fb5f54..066f15e3 100644
--- a/ipv4.c
+++ b/ipv4.c
@@ -55,6 +55,12 @@
 #include "net.h"
 #include "script.h"
 
+#define IPV4_LOOPBACK_ROUTE
+#ifdef __linux__
+/* Linux has had loopback routes in the local table since 2.2 */
+#undef IPV4_LOOPBACK_ROUTE
+#endif
+
 static struct rt_head *routes;
 
 int
@@ -335,6 +341,7 @@ add_subnet_route(struct rt_head *rt, const struct interface *ifp)
 	return rt;
 }
 
+#ifdef IPV4_LOOPBACK_ROUTE
 static struct rt_head *
 add_loopback_route(struct rt_head *rt, const struct interface *ifp)
 {
@@ -360,6 +367,7 @@ add_loopback_route(struct rt_head *rt, const struct interface *ifp)
 	TAILQ_INSERT_HEAD(rt, r, next);
 	return rt;
 }
+#endif
 
 static struct rt_head *
 get_routes(struct interface *ifp)
@@ -508,7 +516,9 @@ ipv4_buildroutes(void)
 		dnr = get_routes(ifp);
 		dnr = massage_host_routes(dnr, ifp);
 		dnr = add_subnet_route(dnr, ifp);
+#ifdef IPV4_LOOPBACK_ROUTE
 		dnr = add_loopback_route(dnr, ifp);
+#endif
 		if (ifp->options->options & DHCPCD_GATEWAY) {
 			dnr = add_router_host_route(dnr, ifp);
 			dnr = add_destination_route(dnr, ifp);