From: Roy Marples <roy@marples.name>
Date: Tue, 18 Nov 2014 10:55:44 +0000 (+0000)
Subject: Loopback interfaces have routes scoped to the host only.
X-Git-Tag: v6.6.3~15
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=dcf142a37165a42c5a822fe6b3022183c6db69bc;p=thirdparty%2Fdhcpcd.git

Loopback interfaces have routes scoped to the host only.
---

diff --git a/if-linux.c b/if-linux.c
index 80f632f6..e65e91f7 100644
--- a/if-linux.c
+++ b/if-linux.c
@@ -1281,7 +1281,9 @@ if_route(const struct rt *rt, int action)
 			nlm.rt.rtm_protocol = RTPROT_KERNEL;
 		else
 			nlm.rt.rtm_protocol = RTPROT_BOOT;
-		if (rt->gate.s_addr == INADDR_ANY ||
+		if (rt->iface->flags & IFF_LOOPBACK)
+			nlm.rt.rtm_scope = RT_SCOPE_HOST;
+		else if (rt->gate.s_addr == INADDR_ANY ||
 		    (rt->gate.s_addr == rt->dest.s_addr &&
 			rt->net.s_addr == INADDR_BROADCAST))
 			nlm.rt.rtm_scope = RT_SCOPE_LINK;
@@ -1409,7 +1411,9 @@ if_route6(const struct rt6 *rt, int action)
 	else {
 		nlm.hdr.nlmsg_flags |= NLM_F_CREATE | NLM_F_EXCL;
 		/* None interface subnet routes are static. */
-		if (IN6_IS_ADDR_UNSPECIFIED(&rt->gate)) {
+		if (rt->iface->flags & IFF_LOOPBACK)
+			nlm.rt.rtm_scope = RT_SCOPE_HOST;
+		else if (IN6_IS_ADDR_UNSPECIFIED(&rt->gate)) {
 			nlm.rt.rtm_protocol = RTPROT_KERNEL;
 			nlm.rt.rtm_scope = RT_SCOPE_LINK;
 		} else