|
 |
5bf5d89 |
From f3d697a84e90f31a86874e334240ee1360a2fbf8 Mon Sep 17 00:00:00 2001
|
|
|
5bf5d89 |
From: Jiri Popelka <jpopelka@redhat.com>
|
|
|
5bf5d89 |
Date: Thu, 9 Oct 2014 18:57:22 +0200
|
|
|
5bf5d89 |
Subject: [PATCH] Work-around for hop-limit set to 1
|
|
|
5bf5d89 |
|
|
|
5bf5d89 |
---
|
|
|
5bf5d89 |
common/socket.c | 16 +++++++++++++++-
|
|
|
5bf5d89 |
1 file changed, 15 insertions(+), 1 deletion(-)
|
|
|
5bf5d89 |
|
|
|
5bf5d89 |
diff --git a/common/socket.c b/common/socket.c
|
|
|
5bf5d89 |
index b8b44a6..93406ef 100644
|
|
|
5bf5d89 |
--- a/common/socket.c
|
|
|
5bf5d89 |
+++ b/common/socket.c
|
|
|
5bf5d89 |
@@ -301,7 +301,21 @@ if_register_socket(struct interface_info *info, int family,
|
|
|
5bf5d89 |
}
|
|
|
5bf5d89 |
|
|
|
5bf5d89 |
if ((family == AF_INET6) &&
|
|
|
5bf5d89 |
- ((info->flags & INTERFACE_UPSTREAM) != 0)) {
|
|
|
5bf5d89 |
+ /*
|
|
|
5bf5d89 |
+ * rfc3315 says that: "If relay agent relays messages to
|
|
|
5bf5d89 |
+ * All_DHCP_Servers multicast address or other multicast addresses,
|
|
|
5bf5d89 |
+ * it sets the Hop Limit field to 32."
|
|
|
5bf5d89 |
+ *
|
|
|
5bf5d89 |
+ * Because we use the same socket for all (upper/lower)
|
|
|
5bf5d89 |
+ * interfaces, the hop limit is the same for both/all.
|
|
|
5bf5d89 |
+ * There should be INTERFACE_UPSTREAM in the below condition, but
|
|
|
5bf5d89 |
+ * problem is when the interface which registers the socket is
|
|
|
5bf5d89 |
+ * lower interface, in that case the hop limit was not set
|
|
|
5bf5d89 |
+ * (i.e. set to 1) for both.
|
|
|
5bf5d89 |
+ * Because rfc doesn't say anything about hop limit for lower,
|
|
|
5bf5d89 |
+ * it'd be lesser evil to have 32 in both cases.
|
|
|
5bf5d89 |
+ */
|
|
|
5bf5d89 |
+ ((info->flags & INTERFACE_STREAMS) != 0)) {
|
|
|
5bf5d89 |
int hop_limit = 32;
|
|
|
5bf5d89 |
if (setsockopt(sock, IPPROTO_IPV6, IPV6_MULTICAST_HOPS,
|
|
|
5bf5d89 |
&hop_limit, sizeof(int)) < 0) {
|
|
|
5bf5d89 |
--
|
|
|
5bf5d89 |
2.1.0
|
|
|
5bf5d89 |
|