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.\"
.IX Title "val_get_rrset 3"
.TH val_get_rrset 3 "2013-03-08" "perl v5.12.4" "Programmer's Manual"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
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.SH "NAME"
val_get_rrset() \- get DNSSEC\-validated resource record
information
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\&  #include <validator/validator.h>
\&
\&  struct val_answer_chain {
\&      val_status_t   val_ans_status;
\&      char          *val_ans_name;
\&      int            val_ans_class;
\&      int            val_ans_type;
\&      struct rr_rec *val_ans;
\&      struct val_answer_chain *val_ans_next;
\&  };
\&
\&  struct rr_rec {
\&      size_t         rr_length;
\&      unsigned char *rr_data;
\&      struct rr_rec *rr_next;
\&  };
\&
\&  int val_get_rrset(val_context_t *ctx,
\&                    const char *name,
\&                    int class,
\&                    int type,
\&                    unsigned int flags,
\&                    struct val_answer_chain **answers);
\&      
\&  void val_free_answer_chain(struct val_answer_chain *answers);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\fI\fIval_get_rrset()\fI\fR performs \s-1DNSSEC\s0 validation for the given \s-1DNS\s0
name, class and type. It returns the \s-1DNSSEC\s0 validation status
for the resource record set, but does not return any 
authentication chain details. If the authentication chain details are
required, the \fI\fIval_resolve_and_check()\fI\fR function must be used instead.
.PP
\&\fI\fIval_get_rrset()\fI\fR returns its results in the val_answer_chain structure. The
memory for this structure is allocated by val_get_rrset; the user must
release this memory after use using the \fI\fIval_free_answer_chain()\fI\fR function.
.PP
The RRsets in the response are returned in the val_answer_chain structure.
The val_ans_name member contains the \s-1DNS\s0 name of the actual resource 
record set returned.  This value may differ from the value passed as the 
\&\fIname\fR argument to \fIval_get_rrset()\fR if the resource record was returned after 
following a \s-1CNAME\s0 or \s-1DNAME\s0 alias. val_ans_name and val_ans_type
contains the actual class and type for the returned resource record. These
values may differ from the values passed as arguments to \fIval_get_rrset()\fR if 
the query type or class has the value 255 (\s-1ANY\s0). The resource record set is 
returned in \fIval_ans\fRas a linked list of rr_length and rr_data tuples, 
for data returned in each resource record of the resource record set. 
\&\fIval_ans\fR may be \s-1NULL\s0 if the name is non-existant.
.PP
\&\fIval_ans_status\fR gives the combined validation status value for the 
the given RRset.  \fI\fIval_istrusted()\fI\fR and
\&\fI\fIval_isvalidated()\fI\fR can be used to determine the trustworthiness of data and
\&\fI\fIp_val_status()\fI\fR can be used to display the status value to the user in \s-1ASCII\s0
format (See \fI\fIlibval\fI\|(3)\fR more for information).
.PP
The \fIctx\fR parameter specifies the validation context, which can be set to \s-1NULL\s0
for default values (see \fI\fIlibval\fI\|(3)\fR and \fIdnsval.conf\fR for more details on 
validation contexts and validation policy).
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
The \fI\fIval_get_rrset()\fI\fR function returns 0 on success and one of the error codes
defined in \fIlibval\fR\|(3) on failure.
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2004\-2013 \s-1SPARTA\s0, Inc.  All rights reserved.
See the \s-1COPYING\s0 file included with the DNSSEC-Tools package for details.
.SH "AUTHORS"
.IX Header "AUTHORS"
Suresh Krishnaswamy
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fI\fIval_getaddrinfo\fI\|(3)\fR
.PP
\&\fI\fIval_gethostbyname\fI\|(3)\fR, \fI\fIval_res_query\fI\|(3)\fR
.PP
\&\fI\fIlibval\fI\|(3)\fR
.PP
http://www.dnssec\-tools.org