From 0bb46aa8b419314aa147801c9f6141272b4f4b4d Mon Sep 17 00:00:00 2001
From: Oliver Herms <oliver.herms@exaring.de>
Date: Mon, 15 Oct 2018 17:24:11 +0200
Subject: [PATCH] Added extended IP reachability TLV
---
.../packet/tlv_extended_ip_reachability.go | 71 +++++++++++++++++--
1 file changed, 66 insertions(+), 5 deletions(-)
diff --git a/protocols/isis/packet/tlv_extended_ip_reachability.go b/protocols/isis/packet/tlv_extended_ip_reachability.go
index 9fbbe5c0..b53fcff3 100644
--- a/protocols/isis/packet/tlv_extended_ip_reachability.go
+++ b/protocols/isis/packet/tlv_extended_ip_reachability.go
@@ -1,14 +1,75 @@
package packet
+import (
+ "bytes"
+
+ "github.com/taktv6/tflow2/convert"
+)
+
+// ExtendedIPReachabilityTLVType is the type code of an Extended IP Reachability TLV
const ExtendedIPReachabilityTLVType = 135
+// ExtendedIPReachabilityTLV represents an Extended IP Reachability TLV
type ExtendedIPReachabilityTLV struct {
- TLVType uint8
- TLVLength uint8
+ TLVType uint8
+ TLVLength uint8
+ ExtendedIPReachabilities []ExtendedIPReachability
+}
+
+// ExtendedIPReachability represents a single Extendend IP Reachability Information
+type ExtendedIPReachability struct {
Metric uint32
UDSubBitPfxLen uint8
Address uint32
- SubTLVType uint8
- SubTLVLength uint8
- SubTLVs []interface{}
+ SubTLVs []TLV
+}
+
+// Type gets the type of the TLV
+func (e *ExtendedIPReachabilityTLV) Type() uint8 {
+ return e.TLVType
+}
+
+// Length gets the length of the TLV
+func (e *ExtendedIPReachabilityTLV) Length() uint8 {
+ return e.TLVLength
+}
+
+// Value returns the TLV itself
+func (e *ExtendedIPReachabilityTLV) Value() interface{} {
+ return e
+}
+
+// Serialize serializes an ExtendedIPReachabilityTLV
+func (e *ExtendedIPReachabilityTLV) Serialize(buf *bytes.Buffer) {
+ buf.WriteByte(ExtendedIPReachabilityTLVType)
+ buf.WriteByte(e.TLVLength)
+
+ for _, extIPReach := range e.ExtendedIPReachabilities {
+ extIPReach.Serialize(buf)
+ }
+}
+
+// Serialize serializes an ExtendedIPReachability
+func (e *ExtendedIPReachability) Serialize(buf *bytes.Buffer) {
+ if len(e.SubTLVs) != 0 {
+ e.setSFlag()
+ }
+ buf.Write(convert.Uint32Byte(e.Metric))
+ buf.WriteByte(e.UDSubBitPfxLen)
+ buf.Write(convert.Uint32Byte(e.Address))
+ for _, tlv := range e.SubTLVs {
+ tlv.Serialize(buf)
+ }
+}
+
+func (e *ExtendedIPReachability) setSFlag() {
+ sFlag := uint8(64)
+ e.UDSubBitPfxLen = e.UDSubBitPfxLen | sFlag
+}
+
+func (e *ExtendedIPReachability) getPfxLen() uint8 {
+ tmp := e.UDSubBitPfxLen
+ tmp = tmp << 2
+ tmp = tmp >> 2
+ return tmp
}
--
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