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Title: lwres_getrrsetbyname
Author:
Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/>
Date: 2007-06-18
Manual: BIND9
Source: ISC
Language: English
* Define some portability stuff
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http://bugs.debian.org/507673
http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
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* set default formatting
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disable hyphenation
disable justification (adjust text to left margin only)
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* MAIN CONTENT STARTS HERE *
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#include <lwres/netdb.h>
\w'int lwres_getrrsetbyname('u "int lwres_getrrsetbyname(const char *" "hostname" ", unsigned int " "rdclass" ", unsigned int " "rdtype" ", unsigned int " "flags" ", struct rrsetinfo **" "res" ");"
\w'void lwres_freerrset('u "void lwres_freerrset(struct rrsetinfo *" "rrset" ");"
The following structures are used:
struct rdatainfo {
unsigned int rdi_length; /* length of data */
unsigned char *rdi_data; /* record data */
};
struct rrsetinfo {
unsigned int rri_flags; /* RRSET_VALIDATED... */
unsigned int rri_rdclass; /* class number */
unsigned int rri_rdtype; /* RR type number */
unsigned int rri_ttl; /* time to live */
unsigned int rri_nrdatas; /* size of rdatas array */
unsigned int rri_nsigs; /* size of sigs array */
char *rri_name; /* canonical name */
struct rdatainfo *rri_rdatas; /* individual records */
struct rdatainfo *rri_sigs; /* individual signatures */
};
lwres_getrrsetbyname() gets a set of resource records associated with a hostname, class, and type. hostname is a pointer a to null-terminated string. The flags field is currently unused and must be zero.
After a successful call to lwres_getrrsetbyname(), *res is a pointer to an rrsetinfo structure, containing a list of one or more rdatainfo structures containing resource records and potentially another list of rdatainfo structures containing SIG resource records associated with those records. The members rri_rdclass and rri_rdtype are copied from the parameters. rri_ttl and rri_name are properties of the obtained rrset. The resource records contained in rri_rdatas and rri_sigs are in uncompressed DNS wire format. Properties of the rdataset are represented in the rri_flags bitfield. If the RRSET_VALIDATED bit is set, the data has been DNSSEC validated and the signatures verified.
All of the information returned by lwres_getrrsetbyname() is dynamically allocated: the rrsetinfo and rdatainfo structures, and the canonical host name strings pointed to by the rrsetinfostructure. Memory allocated for the dynamically allocated structures created by a successful call to lwres_getrrsetbyname() is released by lwres_freerrset(). rrset is a pointer to a struct rrset created by a call to lwres_getrrsetbyname().
lwres_getrrsetbyname() returns zero on success, and one of the following error codes if an error occurred:
ERRSET_NONAME
the name does not exist
ERRSET_NODATA
the name exists, but does not have data of the desired type
ERRSET_NOMEMORY
memory could not be allocated
ERRSET_INVAL
a parameter is invalid
ERRSET_FAIL
other failure
lwres(3).
Internet Systems Consortium, Inc.
Copyright \(co 2000, 2001, 2004, 2005, 2007, 2014-2016 Internet Systems Consortium, Inc. ("ISC")