Help on DNS

wireless · Joined: 02 Nov 2003 Posts: 16 Location: London England

Two simple questions about DNSResolve.

1. Where does the stack get the DNS server address from?

2. Do I need "http://www" in front of the host name I am trying to resolve.

Can anybody post a simple example of resolving a host name to an IP address. I have tried using the smtp_mail example but am having no luck.

Thanks in anticipation.

vijay s · Joined: 20 Oct 2007 Posts: 17 Location: coimbatore,india

You have to specify your DNS Server IP address in TCP/IP Stack. When you enter any Domain name in browser, it sends the domain name to DNS Server, it resolves the corresponding IP.

Of course, you have to enter http://www in browser.

What is the stack you using CCS or Microchip?
_________________
with regards
vijay s

asmallri · Joined: 12 Aug 2004 Posts: 1635 Location: Perth, Australia

wireless · Joined: 02 Nov 2003 Posts: 16 Location: London England

Thanks Vijay and Andrew for your replies.

I am using DHCP, the CCS TCP/IP stack with CCS PCH C Compiler, Version 4.058 and a PIC18F67J60. The software is all working fine if I specify the IP address of the server to which I am connecting. It also has a HTTP server to set up all the parameters which also works OK.

The DNSResolve returns with an error 04 which is the DNS_GET_RESULT state. From this I assume that it has sent the UDP packet but failed to get a reply from the DNS server.

I will try and do some more debugging later today.

Regards

Terry