vrrpd: add IPv4 pseudoheader option for VRRPv3

This commit adds a new option to control whether a VRRPv3 group
accepts / computes its checksum with a prepended IPv4 pseudoheader.
This should improve interoperability with other devices.

Signed-off-by: Siger Yang <siger.yang@outlook.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/vrrpd/vrrp.h b/vrrpd/vrrp.h
index c181c2159b..b3141ef318 100644
--- a/vrrpd/vrrp.h
+++ b/vrrpd/vrrp.h
@@ -53,6 +53,7 @@
 #define VRRP_DEFAULT_ADVINT 100
 #define VRRP_DEFAULT_PREEMPT true
 #define VRRP_DEFAULT_ACCEPT true
+#define VRRP_DEFAULT_CHECKSUM_WITH_IPV4_PSEUDOHEADER true
 #define VRRP_DEFAULT_SHUTDOWN false
 
 /* User compatibility constant */
@@ -70,6 +71,7 @@ struct vrrp_defaults {
 	uint16_t advertisement_interval;
 	bool preempt_mode;
 	bool accept_mode;
+	bool checksum_with_ipv4_pseudoheader;
 	bool shutdown;
 };
 
@@ -266,6 +268,14 @@ struct vrrp_vrouter {
 	 */
 	bool accept_mode;
 
+	/*
+	 * Indicates whether this router computes and accepts VRRPv3 checksums
+	 * without pseudoheader, for device interoperability.
+	 *
+	 * This option should only affect IPv4 virtual routers.
+	 */
+	bool checksum_with_ipv4_pseudoheader;
+
 	struct vrrp_router *v4;
 	struct vrrp_router *v6;
 };