WIP multiprotocol capability and IPv6

1 files changed, 18 insertions, 1 deletions

diff --git a/src/main/java/com/lumaserv/bgp/protocol/message/BGPOpen.java b/src/main/java/com/lumaserv/bgp/protocol/message/BGPOpen.java
index 875f7bc..e83b751 100644
--- a/src/main/java/com/lumaserv/bgp/protocol/message/BGPOpen.java
+++ b/src/main/java/com/lumaserv/bgp/protocol/message/BGPOpen.java
@@ -22,13 +22,30 @@ public class BGPOpen {
     }
 
     public byte[] build() {
-        byte[] message = new byte[6 + identifier.length];
+        byte[] message = new byte[5 + identifier.length + 1 + 2 + 2 * 6];
         message[0] = version;
         message[1] = (byte) (asn >> 8);
         message[2] = (byte) (asn & 0xFF);
         message[3] = (byte) (holdTime >> 8);
         message[4] = (byte) (holdTime & 0xFF);
         System.arraycopy(identifier, 0, message, 5, identifier.length);
+        message[5 + identifier.length + 0] = 14; // Length (0E)
+        message[5 + identifier.length + 1] =  2; // Parameter Type: capability (02)
+        message[5 + identifier.length + 2] = 12; // Length (0C)
+
+        message[5 + identifier.length + 3] =  1; // Type: multiprotocol (01)
+        message[5 + identifier.length + 4] =  4; // Length (04)
+        message[5 + identifier.length + 5] =  0; // IPv6 (0002)
+        message[5 + identifier.length + 6] =  2; //
+        message[5 + identifier.length + 7] =  0; // Reserved
+        message[5 + identifier.length + 8] =  1; // Unicast (01)
+
+        message[5 + identifier.length + 9] =  1; // Type: multiprotocol (01)
+        message[5 + identifier.length +10] =  4; // Length (04)
+        message[5 + identifier.length +11] =  0; // IPv4 (0001)
+        message[5 + identifier.length +12] =  1; //
+        message[5 + identifier.length +13] =  0; // Reserved
+        message[5 + identifier.length +14] =  1; // Unicast (01)
         return message;
     }