it should convert it as 0377777706676F6F676C6503636F6D00

0377777706676F6F676C6503636F6D00 is the hex dump representation of the name part of the assembled DNS packet: 

0020  0a 02 80 22 00 35 00 28  96 13 f4 3b 01 00 00 01   ...".5.( ...;
+....
0030  00 00 00 00 00 00 03 77  77 77 06 67 6f 6f 67 6c   .......w ww.g
+oogl
0040  65 03 63 6f 6d 00 00 01  00 01                     e.com... ..

[download]

The above dump lines correspond to the the plaintext tree parts shown in the middle frame of the wireshark window: 

    Answer RRs: 0
    Additional RRs: 0
  V Queries
    V www.google.com: type A, class IN
        Name: www.google.com
        Type: A (Host address)
        Class: IN (0x0001)

[download]

So, as you see, the name is encoded in that packet as you require, as it is sent to the DNS server. Encoding that beforehand doesn't make sense. I guess you are having an XY problem. What are you trying to do, with what results?

--shmem 

_($_=" "x(1<<5)."?\n".q·/)Oo.  G°\        /
                              /\_¯/(q    /
----------------------------  \__(m.====·.(_("always off the crowd"))."·
");sub _{s./.($e="'Itrs `mnsgdq Gdbj O`qkdq")=~y/"-y/#-z/;$e.e && print}

In reply to Re: How to convert the domain name format data into hexadecimal format? by shmem
in thread How to convert the domain name format data into hexadecimal format? by Anonymous Monk

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