Re: [lwip-devel] [bug #56280] lwIP DNS need to support CNAME Resource Record

[Christopher Nocker]

Hi Jeff,

Our implementations are slightly different in what they are trying to achieve.  I was trying to iterate over the response from the DNS server to see if an A record was present (i.e. when the DNS server would have done the recursion and all of the CNAMEs for the query would be in the response).  Your implementation is explicitly looking for the CNAME response to a query.

I have tried your implementation and queried a name which I know has a couple of CNAMEs in the response but my application was never able to resolve it.  Maybe I'm using it wrong?  I'm guessing that it is working for you?

Did you try my implementation?  Does my implementation suit your needs?

Regards,

Chris

On Tue, Jun 30, 2020 at 8:21 PM Thompson, Jeff <JeffThompson@invue.com> wrote:

Attached is the solution I came up with. All my changes are conditionalized the macro CNAME_HACK. The entry point is the function netconn_gethostCname().

Jeff Thompson  |  Senior Electrical Engineer-Firmware
+1 704 752 6513 x1394
www.invue.com
-----Original Message-----
From: Chris Nocker <INVALID.NOREPLY@gnu.org>
Sent: Monday, June 29, 2020 23:45
To: Simon Goldschmidt <goldsimon@gmx.de>; Gao Qingshui <gaoqingshui202@163.com>; Thompson, Jeff <JeffThompson@invue.com>; Chris Nocker <nocker02@gmail.com>; Sylvain Rochet <gradator@gradator.net>; lwip-devel@nongnu.org; lwip-members@nongnu.org
Subject: [bug #56280] lwIP DNS need to support CNAME Resource Record

Additional Item Attachment, bug #56280 (project lwip):

File name: 0001-DNS-Allowed-processing-of-a-DNS-response-that-contai.patch
Size:1 KB

<https://savannah.nongnu.org/file/0001-DNS-Allowed-processing-of-a-DNS-response-that-contai.patch?file_id=49395>



    _______________________________________________________

Reply to this item at:

  <https://savannah.nongnu.org/bugs/?56280>

_______________________________________________
  Message sent via Savannah
  https://savannah.nongnu.org/