From b18825ebc779cd85f9acc40293bb448a09af4cd2 Mon Sep 17 00:00:00 2001
From: Philippe Guibert <philippe.guibert@6wind.com>
Date: Mon, 5 Sep 2016 14:19:40 +0200
Subject: bgpd: evpn NLRI route type 5 forging

This patch introduces the ability to make route type 5 message
when EVPN is enabled. Picked up paramters are collected from the
bgp extra attribute structure and are the ESI, the ethernet tag
information. In addition to this, nexthop attribute is collected too.

Signed-off-by: Philippe Guibert <philippe.guibert@6wind.com>
---
 bgpd/bgp_evpn.c | 51 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 51 insertions(+)

(limited to 'bgpd/bgp_evpn.c')

diff --git a/bgpd/bgp_evpn.c b/bgpd/bgp_evpn.c
index fd785b9a6..a9db7d236 100644
--- a/bgpd/bgp_evpn.c
+++ b/bgpd/bgp_evpn.c
@@ -187,3 +187,54 @@ bgp_nlri_parse_evpn (struct peer *peer, struct attr *attr,
 
   return 0;
 }
+
+void
+bgp_packet_mpattr_route_type_5 (struct stream *s,
+                                struct prefix *p, struct prefix_rd *prd,
+                                u_char *label, struct attr *attr)
+{
+  int len;
+  char temp[16];
+  struct evpn_addr *p_evpn_p;
+
+  memset(&temp, 0, 16);
+  if(p->family != AF_ETHERNET)
+    return;
+  p_evpn_p = &(p->u.prefix_evpn);
+  if (p_evpn_p->flags & IP_PREFIX_V4)
+    len = 8; /* ipv4 */
+  else
+    len = 32; /* ipv6 */
+  stream_putc (s, EVPN_IP_PREFIX);
+  stream_putc (s, 8 /* RD */ + 10 /* ESI */  + 4 /* EthTag */ + 1 + len + 3 /* label */);
+  stream_put (s, prd->val, 8);
+  if(attr && attr->extra)
+    stream_put (s, &(attr->extra->evpn_overlay.eth_s_id), 10);
+  else
+    stream_put (s, &temp, 10);
+  stream_putl (s, p_evpn_p->eth_tag);
+  stream_putc (s, p_evpn_p->ip_prefix_length);
+  if (p_evpn_p->flags & IP_PREFIX_V4)
+    stream_put_ipv4(s, p_evpn_p->ip.v4_addr.s_addr);
+  else
+    stream_put(s, &p_evpn_p->ip.v6_addr, 16);
+  if(attr && attr->extra)
+    {
+      if (p_evpn_p->flags & IP_PREFIX_V4)
+        stream_put_ipv4(s, attr->extra->evpn_overlay.gw_ip.ipv4.s_addr);
+      else
+        stream_put(s, &(attr->extra->evpn_overlay.gw_ip.ipv6), 16);
+    }
+  else
+    {
+      if (p_evpn_p->flags & IP_PREFIX_V4)
+        stream_put_ipv4(s, 0);
+      else
+        stream_put(s, &temp, 16);
+    }
+  if(label)
+    stream_put (s, label, 3);
+  else
+    stream_put3 (s, 0);
+  return;
+}
-- 
cgit v1.2.3