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+.\"
+.\" Copyright (C) 2000, 2001  Internet Software Consortium.
+.\"
+.\" Permission to use, copy, modify, and distribute this software for any
+.\" purpose with or without fee is hereby granted, provided that the above
+.\" copyright notice and this permission notice appear in all copies.
+.\"
+.\" THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM
+.\" DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
+.\" INTERNET SOFTWARE CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT,
+.\" INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
+.\" FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
+.\" NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
+.\" WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+.\"
+.TH "LWRES_GETRRSETBYNAME" "3" "Oct 18, 2000" "BIND9" ""
+.SH NAME
+lwres_getrrsetbyname, lwres_freerrset \- retrieve DNS records
+.SH SYNOPSIS
+\fB#include <lwres/netdb.h>
+.sp
+.na
+int
+lwres_getrrsetbyname(const char *hostname, unsigned int rdclass, unsigned int rdtype, unsigned int flags, struct rrsetinfo **res);
+.ad
+.sp
+.na
+void
+lwres_freerrset(struct rrsetinfo *rrset);
+.ad
+\fR.PP
+The following structures are used:
+.sp
+.nf
+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 */
+};
+.sp
+.fi
+.SH "DESCRIPTION"
+.PP
+\fBlwres_getrrsetbyname()\fR
+gets a set of resource records associated with a
+\fIhostname\fR,
+\fIclass\fR,
+and
+\fItype\fR.
+\fIhostname\fR
+is
+a pointer a to null-terminated string. The
+\fIflags\fR
+field is currently unused and must be zero.
+.PP
+After a successful call to
+\fBlwres_getrrsetbyname()\fR,
+\fI*res\fR
+is a pointer to an
+\fBrrsetinfo\fR
+structure, containing a list of one or more
+\fBrdatainfo\fR
+structures containing resource records and potentially another list of
+\fBrdatainfo\fR
+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. 
+.PP
+All of the information returned by
+\fBlwres_getrrsetbyname()\fR
+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
+\fBlwres_getrrsetbyname()\fR
+is released by
+\fBlwres_freerrset()\fR.
+\fIrrset\fR
+is a pointer to a
+\fBstruct rrset\fR
+created by a call to
+\fBlwres_getrrsetbyname()\fR.
+.PP
+.SH "RETURN VALUES"
+.PP
+\fBlwres_getrrsetbyname()\fR
+returns zero on success, and one of the following error
+codes if an error occurred:
+.TP
+\fBERRSET_NONAME\fR
+the name does not exist
+.TP
+\fBERRSET_NODATA\fR
+the name exists, but does not have data of the desired type
+.TP
+\fBERRSET_NOMEMORY\fR
+memory could not be allocated
+.TP
+\fBERRSET_INVAL\fR
+a parameter is invalid
+.TP
+\fBERRSET_FAIL\fR
+other failure
+.TP
+\fB\fR
+.SH "SEE ALSO"
+.PP
+\fBlwres\fR(3).