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-rw-r--r--src/vnet/ip6-nd/ip6_nd_inline.h8
-rw-r--r--src/vnet/ip6-nd/ip6_ra.c10
-rw-r--r--src/vnet/ip6-nd/ip6_ra.h2
3 files changed, 19 insertions, 1 deletions
diff --git a/src/vnet/ip6-nd/ip6_nd_inline.h b/src/vnet/ip6-nd/ip6_nd_inline.h
index 5e8b9d6e4c0..c959c94ed1d 100644
--- a/src/vnet/ip6-nd/ip6_nd_inline.h
+++ b/src/vnet/ip6-nd/ip6_nd_inline.h
@@ -23,6 +23,7 @@
#include <vnet/ip/icmp46_packet.h>
#include <vnet/ip/ip6.h>
#include <vnet/ip-neighbor/ip_neighbor_types.h>
+#include <vnet/ip6-nd/ip6_ra.h>
typedef enum
{
@@ -71,6 +72,13 @@ icmp6_send_neighbor_advertisement (
clib_host_to_net_u32 (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_SOLICITED |
ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
+ /* if sending RAs is enabled, the "router" flag should be set,
+ * otherwise, neighbors may believe we have changed from a router
+ * to a host - RFC 4861 section 4.4 */
+ if (ip6_ra_adv_enabled (sw_if_index0))
+ icmp6_nsa->advertisement_flags |=
+ clib_host_to_net_u32 (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_ROUTER);
+
icmp6_nsa->icmp.checksum = 0;
icmp6_nsa->icmp.checksum =
ip6_tcp_udp_icmp_compute_checksum (vm, b, ip6_h, &bogus_length);
diff --git a/src/vnet/ip6-nd/ip6_ra.c b/src/vnet/ip6-nd/ip6_ra.c
index 8cd7ab9e905..65b7cf09983 100644
--- a/src/vnet/ip6-nd/ip6_ra.c
+++ b/src/vnet/ip6-nd/ip6_ra.c
@@ -204,6 +204,16 @@ ip6_ra_get_itf (u32 sw_if_index)
return (NULL);
}
+u8
+ip6_ra_adv_enabled (u32 sw_if_index)
+{
+ ip6_ra_t *ra;
+
+ ra = ip6_ra_get_itf (sw_if_index);
+
+ return ((ra != NULL) && (ra->send_radv != 0));
+}
+
/* for "syslogging" - use elog for now */
#define foreach_log_level \
_ (DEBUG, "DEBUG") \
diff --git a/src/vnet/ip6-nd/ip6_ra.h b/src/vnet/ip6-nd/ip6_ra.h
index d09e8c0c975..c5012477d80 100644
--- a/src/vnet/ip6-nd/ip6_ra.h
+++ b/src/vnet/ip6-nd/ip6_ra.h
@@ -82,7 +82,7 @@ extern void ip6_ra_update_secondary_radv_info (ip6_address_t * address,
u32 primary_sw_if_index,
u32 valid_time,
u32 preferred_time);
-
+extern u8 ip6_ra_adv_enabled (u32 sw_if_index);
#endif /* included_ip6_neighbor_h */
/*