[ns] a little doubt at tcp-reno.cc

[Breno Caetano]

hi ns-users, 
I have a little doubt at tcp-reno.cc. In its constructor, have follow code:
RenoTcpAgent::RenoTcpAgent() : TcpAgent(), dupwnd_(0)
{
}
search in some book, i noticed that its calling the constructor of TCPAgent, but i dont know whats means the last command (dupwnd_(0)). I find this name. its a protect variable at tcp.h. but i dont find a function like it. I know this doubt is fool, but really i'm lost. can anybody  help me? some reply is pleased.
regards

 Breno Caetano da Silva
Bacharel em Ciências da Computação - UFPI
Mestrando em Engenharia Elétrica
Escola de Engenharia de São Carlos - EESC
Universidade de São Paulo
Email: breno.caetano at yahoo.com.br
bcs at sel.eesc.usp.br
Fone: (+5516) 81449079
(+5516) 33738149



      Novos endereços, o Yahoo! que você conhece. Crie um email novo com a sua cara @ymail.com ou @rocketmail.com.
http://br.new.mail.yahoo.com/addresses