res_nsearch()--Search for Domain Name

 #include <sys/types.h>
 #include <netinet/in.h>
 #include <arpa/nameser.h>
 #include <resolv.h>

 int res_nsearch(state* res,
                const char *domain_name,
                int  class,
                int  type,
                unsigned char *answer_buffer,  
                int  answer_buffer_length)

The res_nsearch() function is similar to res_search() but it uses a user-declared res pointer instead of the shared _res.

For a description of this function and more information on the parameters, authorities required, return values, error conditions, error messages, usage notes, and related information, see res_search()--Search for Domain Name.

Parameters

res

(Input/Output) The pointer to the state structure.

Related Information

• res_search()--Search for Domain Name
  
  
• res_findzonecut()--Find the Enclosing Zone and Servers
  
  
• res_hostalias()--Retrieve the host alias
  
  
• res_ninit()--Initialize res Structure
  
  
• res_nmkquery()--Place Domain Query in Buffer
  
  
• res_nquery()--Send Domain Query
  
  
• res_nclose()--Close Socket and Reset res Structure
  
  
• res_nsend()--Send Buffered Domain Query
  
  
• res_xlate()--Translate DNS Packets