NS2中的Agent列表

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     NS2代码的分析是很有意思的一件事，因为NS2绝对是一个相当优秀的C++软件，包含了OOP思想的精华； 而OTCL语言是一种简洁、优美、人性化的解释性语言；  另外，我本人对于连接OTCL和C++的tclcl机制，以及分裂对象模型德看法一向是： 软件只要能跑，不管糟糠多少； IT开发者的“牵强附会”能力不可比拟！！

     先从NS2的Agent开始吧， 至于Agent的含义和功能，请参考NS2仿真系列的内容，在此，我对NS2代码的分析总是针对代码本身（如何查看到、相互间如何作用、如何验证分析的结论，以及NS2中用于网络模拟的API）。NS 实现了很多的网络协议，这些协议大部分是以Agent的方式来实现的。

   （很多“为什么”的问题实际意义不大，因为那是NS的设计者和拓展者最为关心的问题，而此处的阅读对象是NS2网络模拟的使用者。）

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       查看所有Agent的脚本

# 功能：
# 本脚本用于显示NS2中类继承关系的树形结构；

# NS 实现了很多的网络协议，这些协议大部分是以Agent的方式来实现的。
# 通过本脚本，我们可以查看NS中各种协议的Agent

proc showAgent arg {
     set cl "Agent"
     foreach cl [$arg info subclass] {
      puts $cl
   if {[$cl info subclass]!=""} {
      showAgent $cl
  }
 }
}
showAgent "Agent"

# showAgent "Agent/TCP"
# showAgent "Agent/UDP"

     Agent所有成员的列表：

#直接输出Agent树结构时的结果：
Agent/Null
AckReconsClass
Agent/DiffusionRouting
Agent/DiffusionApp
Agent/PBC
Agent/LMS
Agent/LMS/Sender
Agent/LMS/Receiver
Agent/PGM
Agent/PGM/Receiver
Agent/PGM/Sender
Agent/Pushback
Agent/LDP
Agent/Ping
Agent/TFRCSink
Agent/TFRC
Agent/OmniMcast
Agent/Flooding
Agent/Diff_Sink
Agent/Diffusion
Agent/Diffusion/ProbGradient
Agent/Diffusion/RateGradient
Agent/AbsTCP
Agent/AbsTCP/TahoeAck
Agent/AbsTCP/RenoAck
Agent/AbsTCP/TahoeDelAck
Agent/AbsTCP/RenoDelAck
Agent/AbsTCPSink
Agent/AbsTCPSink/DelAck
Agent/RAP
Agent/SatRoute
Agent/AOMDV
Agent/AODV
Agent/DSRProto
Agent/DSRAgent
Agent/TORA
Agent/IMEP
Agent/DSDV
Agent/DumbAgent
Agent/MIPBS
Agent/MIPMH
Agent/Encapsulator
Agent/Decapsulator
Agent/HttpInval
Agent/SRM
Agent/SRM/Fixed
Agent/SRM/Probabilistic
Agent/SRM/Deterministic
Agent/SRM/SSM
Agent/SRM/Adaptive
Agent/Mcast
Agent/Mcast/Control
Agent/CtrMcast
Agent/CtrMcast/Encap
Agent/CtrMcast/Decap
Agent/rtProto
Agent/rtProto/Dummy
Agent/rtProto/Algorithmic
Agent/rtProto/Manual
Agent/rtProto/Direct
Agent/rtProto/Session
Agent/rtProto/Static
Agent/rtProto/LS
Agent/rtProto/DV
Agent/GAF
Agent/AckReconsClass
Agent/LossMonitor
LossTrace
Agent/LossMonitor/PLM
PLMLossTrace
Agent/SCTP
Agent/SCTP/CMT
Agent/SCTP/MfrTimestamp
Agent/SCTP/MfrHbAfterRto
Agent/SCTP/MultipleFastRtx
Agent/SCTP/HbAfterRto
Agent/SCTP/Timestamp
Agent/BayTcpApp
Agent/BayTcpApp/FtpServer
Agent/BayTcpApp/FtpClient
Agent/TCPSink
Agent/TCPSink/XCPSink
Agent/TCPSink/Asym
Agent/TCPSink/DelAck
Agent/TCPSink/Sack1
Agent/TCPSink/Sack1/DelAck
Agent/TCP
Agent/TCP/SackRH
Agent/TCP/RFC793edu
Agent/TCP/SimpleTcp
Agent/TCP/Session
Agent/TCP/Int
Agent/TCP/FS
Agent/TCP/Asym
Agent/TCP/Linux
Agent/TCP/Fack
Agent/TCP/Sack1
Agent/TCP/BayFullTcp
Agent/TCP/BayFullTcp/Tahoe
Agent/TCP/BayFullTcp/Newreno
Agent/TCP/BayFullTcp/Sack
Agent/TCP/FullTcp
Agent/TCP/FullTcp/Tahoe
Agent/TCP/FullTcp/Newreno
Agent/TCP/FullTcp/Newreno/XCP
Agent/TCP/FullTcp/Sack
Agent/TCP/Vegas
Agent/TCP/Vegas/RBP
Agent/TCP/Newreno
Agent/TCP/Newreno/FS
Agent/TCP/Newreno/Asym
Agent/TCP/Newreno/Asym/FS
Agent/TCP/Reno
Agent/TCP/Reno/XCP
Agent/TCP/Reno/FS
Agent/TCP/Reno/Asym
Agent/TCP/Reno/RBP
Agent/TP
Agent/MessagePassing
Agent/IVS
Agent/IVS/Source
Agent/IVS/Receiver
Agent/RTCP
Agent/RTP
Agent/CBR/RTP
Agent/UDP
Agent/CBR/UDP
Agent/CBR
Agent/Message
Agent/ConsRcvr
Agent/VatRcvr
Agent/SAack
Agent/SA
Agent/CBR/UDP/SA
Agent/QSAgent
Agent/SRAgent

     当然，针对该查看脚本，可以稍稍修改，实现以下的输出：

     1.仅输出Agent的“儿子”；

     2.仅输出有孙子的Agent的“儿子一家”；

     3.输出Object、SplitObject和TclObject的整个继承列表；

       （由于分裂对象模型的设计，SplitObject和TclObject的继承列表完全一样哦！）