[nox-dev] Difference between hostname and host_netid

[Zheng Cai]

Hi All,

This might be a lame question, but when I was reading the code of the 
authentication module, I found out that there are two ids associated 
with one host: the hostname(host_id) and host_netid(netid). Then I found 
out that they represent two identifiers in two structures:

struct Host 
{                                                                                                                                                

   int64_t   
name;                                                                                                                                          

   GroupList 
groups;                                                                                                                                        

   time_t    
auth_time;                                                                                                                                     

   time_t    
last_active;                                                                                                                                   

   uint32_t  
hard_timeout;                                                                                                                                  

   std::list<AuthedUser> 
users;                                                                                                                             

};                                                                                                                                                           

                                                                                                                                                            

struct HostNetid 
{                                                                                                                                           

   int64_t     
name;                                                                                                                                        

   std::string 
addr_binding;                                                                                                                                

   AddressType 
addr_type;                                                                                                                                   

   bool        
is_router;                                                                                                                                   

   bool        
is_gateway;                                                                                                                                  

   GroupList   
groups;                                                                                                                                      

   boost::shared_ptr<Host> 
host;                                                                                                                            

};


Could someone help me clarify what is the difference between these two 
identifiers? Why do we need two different ids to identify one host?

Thanks very much in advance,

-Zheng Cai

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