1 files changed, 59 insertions, 0 deletions
diff --git a/src/main/java/com/lumaserv/bgp/protocol/attribute/MPReachableNLRIAttribute.java b/src/main/java/com/lumaserv/bgp/protocol/attribute/MPReachableNLRIAttribute.java
new file mode 100644
index 0000000..346cb0e
--- /dev/null
+++ b/src/main/java/com/lumaserv/bgp/protocol/attribute/MPReachableNLRIAttribute.java
@@ -0,0 +1,59 @@
+package com.lumaserv.bgp.protocol.attribute;
+
+import java.net.InetAddress;
+import java.net.UnknownHostException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.Collection;
+
+import lombok.Getter;
+import lombok.Setter;
+
+import com.lumaserv.bgp.protocol.AFI;
+import com.lumaserv.bgp.protocol.IPPrefix;
+import com.lumaserv.bgp.protocol.SAFI;
+
+@Getter
+@Setter
+public class MPReachableNLRIAttribute implements PathAttribute {
+
+    AFI afi;
+    SAFI safi;
+    byte[] nextHop;
+    Collection<IPPrefix> nlriPrefixes;
+
+    public MPReachableNLRIAttribute(byte typeCode, byte[] data) {
+        afi = AFI.fromInteger((data[0] << 8) | data[1]);
+        safi = SAFI.fromInteger(data[2]);
+        int nhLen = data[3];
+        nextHop = new byte[nhLen];
+        System.arraycopy(data, 4, nextHop, 0, nextHop.length);
+        int nlriLen = data.length - 5 - nhLen;
+        nlriPrefixes = new ArrayList<>();
+
+        int offset = 4 + nhLen + 1;
+        int offsetOffset = offset;
+        while ((offset - offsetOffset) < nlriLen) {
+            IPPrefix prefix = new IPPrefix()
+                    .setLength((int)(data[offset]&0xff)) // FIXME IPv4/IPv6 etc
+                    .setAddress(new byte[16]);
+            offset++;
+            int addressLen = (int) Math.ceil(prefix.getLength() / 8d);
+            System.arraycopy(data, offset, prefix.getAddress(), 0, addressLen);
+            offset += addressLen;
+            nlriPrefixes.add(prefix);
+        }
+    }
+
+    public byte getTypeCode() {
+        return 14;
+    }
+
+    public void build(ByteBuffer b) {
+        // FIXME
+    }
+
+    public String toString() {
+        return "AFI:" + afi + " SAFI:" + safi + " NLRIs:" + nlriPrefixes;
+    }
+}