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Programmatically change DNS in VxWorks 6.6

Posted on 2010-09-13
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Last Modified: 2012-06-21
I am wondering if it's possible to programatically change the DNS settings in VxWorks 6.6.  

each location we run our system will need to have a different suffix and it would be a nightmare to have to make different builds just to satisfy the dns requirements.  any help would be greatly appreciated
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Question by:lungsponge121
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by:cookre
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For anybody else who runs into this problem / needs a solution

you can use the following commands to get & set the DNS address in vxworks 6.6 - i don't know if this will work for future versions, and in old versions you need to grab the extern variable arpt_keep

here's how to do it in version 6.6




#define IP_PORT_VXWORKS 66
#include <vxworks.h>
#include <ipcom_sysvar.h>

...

// get the current name

const char* current_domain_name = ipcom_sysvar_get("ipdnsc.domainname", IP_NULL, IP_NULL);

...

// set the new name
if (ipcom_sysvar_set("ipdnsc.domainname", domain_name, 0x1 ) != 0)
  {
    return -1;	  
  }
return 0;

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