dn_skipname()--Skip over Compressed Domain Name

Syntax

 #include <sys/types.h>
 #include <netinet/in.h>
 #include <arpa/nameser.h>
 #include <resolv.h>

 int dn_skipname(unsigned char *compressed_domain_name,
                 unsigned char *end_of_message)

  Service Program Name: QSOSRV2

  Default Public Authority: *USE

  Threadsafe: Yes

The dn_skipname() function is used to skip over a compressed domain name in a DNS packet.

Authorities and Locks

None.

Parameters

compressed_domain_name: (Input) A pointer to a compressed domain name.
end_of_message: (Input) The pointer to the end of the message string.

Return Value

dn_skipname() returns an integer. Possible values are:

-1 (unsuccessful)
n (successful), where n is the size of compressed_domain_name.

Error Conditions

When the dn_skipname() function fails, it does not set specific errno or h_errno values. An error occurs under the following conditions:

NULL pointer(s) passed to the function.
Invalid pointer(s) passed to the function.
end_of_message reached before the end of the compressed domain name.

Usage Notes

dn_skipname() skips over a compressed domain name in a DNS packet and returns the size of compressed_domain_name.
dn_skipname() expects EBCDIC data as input.

Related Information

dn_expand()--Expand Domain Name
dn_find()--Search for Compressed Domain Name
dn_comp()--Compress Domain Name

API introduced: V3R1

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