"X-Kannel-DLR-Mask" value

"Andrikopoulos Dimitrios" <[email protected]>
Newsgroups gmane.comp.mobile.kannel.devel
Message-ID <[email protected]>
Hello,

As I don't know C, can someone tell me what the following code line
means for the value of the header
"X-Kannel-DLR-Mask"?
 
http_header_add(push_headers, "X-Kannel-DLR-Mask", octstr_get_cstr(dos =
octstr_format("%d", 31)));

If possible provide equivalent code for Perl or PHP
 
Thanks,
Dimitris
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