From 19bfb2748633e14ccc0c5e62bf116d647dbb7a7b Mon Sep 17 00:00:00 2001
From: Anuradha Karuppiah <anuradhak@cumulusnetworks.com>
Date: Wed, 25 Mar 2020 06:37:24 -0700
Subject: [PATCH] lib: prefix: Add VTEP-IP to the EAD route prefix

In the global evpn routing table RD is part of the key. However in the
per-VNI routing table the key doesn't include the RD and we need more
than the ESI to distinguish between EAD routes from different VTEPs
attached to the same Ethernet Segment.

This commit also includes other definitions needed for managing an
ESI.

Signed-off-by: Anuradha Karuppiah <anuradhak@cumulusnetworks.com>
---
 lib/prefix.h | 27 ++++++++++++++++++++++++++-
 1 file changed, 26 insertions(+), 1 deletion(-)

diff --git a/lib/prefix.h b/lib/prefix.h
index 53e9dc3cb3..2d1e8f47d6 100644
--- a/lib/prefix.h
+++ b/lib/prefix.h
@@ -43,9 +43,26 @@ extern "C" {
 #define ETH_ALEN 6
 #endif
 
+/* value of first byte of ESI */
+#define ESI_TYPE_ARBITRARY 0  /* */
+#define ESI_TYPE_LACP      1  /* <> */
+#define ESI_TYPE_BRIDGE    2  /* <Root bridge Mac-6B>:<Root Br Priority-2B>:00 */
+#define ESI_TYPE_MAC       3  /* <Syst Mac Add-6B>:<Local Discriminator Value-3B> */
+#define ESI_TYPE_ROUTER    4  /* <RouterId-4B>:<Local Discriminator Value-4B> */
+#define ESI_TYPE_AS        5  /* <AS-4B>:<Local Discriminator Value-4B> */
+
+#define MAX_ESI {0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff}
+
+
 #define ESI_BYTES 10
 #define ESI_STR_LEN (3 * ESI_BYTES)
 
+/* Maximum number of VTEPs per-ES -
+ * XXX - temporary limit for allocating strings etc.
+ */
+#define ES_VTEP_MAX_CNT 10
+#define ES_VTEP_LIST_STR_SZ (ES_VTEP_MAX_CNT * 16)
+
 #define ETHER_ADDR_STRLEN (3*ETH_ALEN)
 /*
  * there isn't a portable ethernet address type. We define our
@@ -64,12 +81,14 @@ struct ethaddr {
 #define PREFIX_LEN_ROUTE_TYPE_5_IPV6 (30*8)
 
 typedef struct esi_t_ {
-	uint8_t val[10];
+	uint8_t val[ESI_BYTES];
 } esi_t;
 
 struct evpn_ead_addr {
 	esi_t esi;
 	uint32_t eth_tag;
+	uint8_t ip_prefix_length;
+	struct ipaddr ip;
 };
 
 struct evpn_macip_addr {
@@ -217,6 +236,8 @@ struct prefix_evpn {
 
 static inline int is_evpn_prefix_ipaddr_none(const struct prefix_evpn *evp)
 {
+	if (evp->prefix.route_type == 1)
+		return IS_IPADDR_NONE(&(evp)->prefix.ead_addr.ip);
 	if (evp->prefix.route_type == 2)
 		return IS_IPADDR_NONE(&(evp)->prefix.macip_addr.ip);
 	if (evp->prefix.route_type == 3)
@@ -230,6 +251,8 @@ static inline int is_evpn_prefix_ipaddr_none(const struct prefix_evpn *evp)
 
 static inline int is_evpn_prefix_ipaddr_v4(const struct prefix_evpn *evp)
 {
+	if (evp->prefix.route_type == 1)
+		return IS_IPADDR_V4(&(evp)->prefix.ead_addr.ip);
 	if (evp->prefix.route_type == 2)
 		return IS_IPADDR_V4(&(evp)->prefix.macip_addr.ip);
 	if (evp->prefix.route_type == 3)
@@ -243,6 +266,8 @@ static inline int is_evpn_prefix_ipaddr_v4(const struct prefix_evpn *evp)
 
 static inline int is_evpn_prefix_ipaddr_v6(const struct prefix_evpn *evp)
 {
+	if (evp->prefix.route_type == 1)
+		return IS_IPADDR_V6(&(evp)->prefix.ead_addr.ip);
 	if (evp->prefix.route_type == 2)
 		return IS_IPADDR_V6(&(evp)->prefix.macip_addr.ip);
 	if (evp->prefix.route_type == 3)
-- 
2.39.5