mlsr/lsa/AdjLsa.go

// Package lsa
// @Author: Wang Feng
// @Description:
// @Version: 0.1.0
// @Date: 2022/3/9 22:13
// @Copyright: MIN-Group；国家重大科技基础设施——未来网络北大实验室；深圳市信息论与未来网络重点实验室
//

package lsa

import (
	"minlib/encoding"
	"mlsr/extensions"
)

type AdjLsa struct {
	encoding.SelfEncodingBase
	LsaBase
	AdjLsaAdjacenctList
}

//
//  GetAdjList
//  @Description: 获取邻接信息表
//  @receiver a
//  @return []*AdjLsaAdjacencyInfo
//
func (a *AdjLsa) GetAdjList() []*AdjLsaAdjacencyInfo {
	return a.AdjLsaAdjacenctList.GetAdjList()
}

//
//  AddAdjacencyInfo
//  @Description: 增加一条邻接信息
//  @receiver a
//  @param info
//
func (a *AdjLsa) AddAdjacencyInfo(info *AdjLsaAdjacencyInfo) {
	a.Insert(info)
}

//
//  IsEqualContent
//  @Description: 判断是否与另一个AdjLsa中的邻接表相同
//  @receiver a
//  @param aLsa
//  @return bool
//
func (a *AdjLsa) IsEqualContent(aLsa *AdjLsa) bool {
	panic("")
}

//
//  ToString
//  @Description: 将Lsa转字符串，方便调试程序
//  @receiver a
//  @return string
//
func (a *AdjLsa) ToString() string {
	panic("")
}

//
//  WireEncode
//  @Description: 线速编码
//  @receiver a
//  @param encoder
//  @return int
//  @return error
//
func (a *AdjLsa) WireEncode(encoder *encoding.Encoder) (int,error) {
	totalLength := 0
	// TLV-Value
	tmpLen,err := a.AdjLsaAdjacenctList.WireEncode(encoder)
	if err != nil {
		return 0, err
	}
	totalLength+=tmpLen
	tmpLen,err = a.LsaBase.WireEncode(encoder)
	if err != nil {
		return 0, err
	}
	totalLength+=tmpLen

	// TLV-Length
	tmpLen,err = encoder.PrependVarNumber(encoding.VlInt(totalLength))
	if err != nil {
		return 0, err
	}
	totalLength += tmpLen

	// TLV-Type
	tmpLen, err = encoder.PrependVarNumber(extensions.TlvMlsrLsaAdjacency)
	if err != nil {
		return 0, err
	}
	totalLength += tmpLen

	return totalLength,nil
}

//
//  WireDecode
//  @Description: 线速解码
//  @receiver a
//  @param block
//  @return error
//
func (a *AdjLsa) WireDecode(block *encoding.Block) error {
	// 检查 TLV-TYPE 是否正确
	if err := encoding.ExpectType(block.GetType(), extensions.TlvMlsrLsaAdjacency); err != nil {
		return err
	}

	// 首先解析子Block
	if err := block.ParseSubElements(); err != nil {
		return err
	}

	// 提取参数
	for _, parameter := range block.GetSubElements(){
		switch parameter.GetType() {
		case extensions.TlvMlsrLsaBase:
			if err:= a.LsaBase.WireDecode(parameter); err != nil {
				return err
			}
		case extensions.TlvMlsrAdjLsaAdjacencyList:
			if err:= a.AdjLsaAdjacenctList.WireDecode(parameter); err != nil {
				return err
			}
		}
	}
	return nil
}