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-rw-r--r--contrib/bind9/lib/lwres/getrrset.c292
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diff --git a/contrib/bind9/lib/lwres/getrrset.c b/contrib/bind9/lib/lwres/getrrset.c
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--- a/contrib/bind9/lib/lwres/getrrset.c
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-/*
- * Copyright (C) 2004, 2005, 2007, 2012 Internet Systems Consortium, Inc. ("ISC")
- * Copyright (C) 2000-2003 Internet Software Consortium.
- *
- * Permission to use, copy, modify, and/or 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 ISC DISCLAIMS ALL WARRANTIES WITH
- * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
- * AND FITNESS. IN NO EVENT SHALL ISC 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.
- */
-
-/* $Id: getrrset.c,v 1.18 2007/06/19 23:47:22 tbox Exp $ */
-
-/*! \file */
-
-/**
- * DESCRIPTION
- *
- * 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().
- *
- * The following structures are used:
- *
- * \code
- * 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
- * };
- * \endcode
- *
- * \section getrrset_return Return Values
- *
- * lwres_getrrsetbyname() returns zero on success, and one of the
- * following error codes if an error occurred:
- *
- * \li #ERRSET_NONAME: the name does not exist
- *
- * \li #ERRSET_NODATA:
- * the name exists, but does not have data of the desired type
- *
- * \li #ERRSET_NOMEMORY:
- * memory could not be allocated
- *
- * \li #ERRSET_INVAL:
- * a parameter is invalid
- *
- * \li #ERRSET_FAIL:
- * other failure
- */
-
-#include <config.h>
-
-#include <string.h>
-#include <errno.h>
-#include <stdlib.h>
-
-#include <lwres/lwres.h>
-#include <lwres/net.h>
-#include <lwres/netdb.h> /* XXX #include <netdb.h> */
-
-#include "assert_p.h"
-
-/*!
- * Structure to map results
- */
-static unsigned int
-lwresult_to_result(lwres_result_t lwresult) {
- switch (lwresult) {
- case LWRES_R_SUCCESS: return (ERRSET_SUCCESS);
- case LWRES_R_NOMEMORY: return (ERRSET_NOMEMORY);
- case LWRES_R_NOTFOUND: return (ERRSET_NONAME);
- case LWRES_R_TYPENOTFOUND: return (ERRSET_NODATA);
- default: return (ERRSET_FAIL);
- }
-}
-
-/*@{*/
-/*!
- * malloc / calloc functions that guarantee to only
- * return NULL if there is an error, like they used
- * to before the ANSI C committee broke them.
- */
-
-static void *
-sane_malloc(size_t size) {
- if (size == 0U)
- size = 1;
- return (malloc(size));
-}
-
-static void *
-sane_calloc(size_t number, size_t size) {
- size_t len = number * size;
- void *mem = sane_malloc(len);
- if (mem != NULL)
- memset(mem, 0, len);
- return (mem);
-}
-/*@}*/
-
-/*% Returns a set of resource records associated with a hostname, class, and type. hostname is a pointer a to null-terminated string. */
-int
-lwres_getrrsetbyname(const char *hostname, unsigned int rdclass,
- unsigned int rdtype, unsigned int flags,
- struct rrsetinfo **res)
-{
- lwres_context_t *lwrctx = NULL;
- lwres_result_t lwresult;
- lwres_grbnresponse_t *response = NULL;
- struct rrsetinfo *rrset = NULL;
- unsigned int i;
- unsigned int lwflags;
- unsigned int result;
-
- if (rdclass > 0xffff || rdtype > 0xffff) {
- result = ERRSET_INVAL;
- goto fail;
- }
-
- /*
- * Don't allow queries of class or type ANY
- */
- if (rdclass == 0xff || rdtype == 0xff) {
- result = ERRSET_INVAL;
- goto fail;
- }
-
- lwresult = lwres_context_create(&lwrctx, NULL, NULL, NULL, 0);
- if (lwresult != LWRES_R_SUCCESS) {
- result = lwresult_to_result(lwresult);
- goto fail;
- }
- (void) lwres_conf_parse(lwrctx, lwres_resolv_conf);
-
- /*
- * If any input flags were defined, lwflags would be set here
- * based on them
- */
- UNUSED(flags);
- lwflags = 0;
-
- lwresult = lwres_getrdatabyname(lwrctx, hostname,
- (lwres_uint16_t)rdclass,
- (lwres_uint16_t)rdtype,
- lwflags, &response);
- if (lwresult != LWRES_R_SUCCESS) {
- result = lwresult_to_result(lwresult);
- goto fail;
- }
-
- rrset = sane_malloc(sizeof(struct rrsetinfo));
- if (rrset == NULL) {
- result = ERRSET_NOMEMORY;
- goto fail;
- }
- rrset->rri_name = NULL;
- rrset->rri_rdclass = response->rdclass;
- rrset->rri_rdtype = response->rdtype;
- rrset->rri_ttl = response->ttl;
- rrset->rri_flags = 0;
- rrset->rri_nrdatas = 0;
- rrset->rri_rdatas = NULL;
- rrset->rri_nsigs = 0;
- rrset->rri_sigs = NULL;
-
- rrset->rri_name = sane_malloc(response->realnamelen + 1);
- if (rrset->rri_name == NULL) {
- result = ERRSET_NOMEMORY;
- goto fail;
- }
- strncpy(rrset->rri_name, response->realname, response->realnamelen);
- rrset->rri_name[response->realnamelen] = 0;
-
- if ((response->flags & LWRDATA_VALIDATED) != 0)
- rrset->rri_flags |= RRSET_VALIDATED;
-
- rrset->rri_nrdatas = response->nrdatas;
- rrset->rri_rdatas = sane_calloc(rrset->rri_nrdatas,
- sizeof(struct rdatainfo));
- if (rrset->rri_rdatas == NULL) {
- result = ERRSET_NOMEMORY;
- goto fail;
- }
- for (i = 0; i < rrset->rri_nrdatas; i++) {
- rrset->rri_rdatas[i].rdi_length = response->rdatalen[i];
- rrset->rri_rdatas[i].rdi_data =
- sane_malloc(rrset->rri_rdatas[i].rdi_length);
- if (rrset->rri_rdatas[i].rdi_data == NULL) {
- result = ERRSET_NOMEMORY;
- goto fail;
- }
- memcpy(rrset->rri_rdatas[i].rdi_data, response->rdatas[i],
- rrset->rri_rdatas[i].rdi_length);
- }
- rrset->rri_nsigs = response->nsigs;
- rrset->rri_sigs = sane_calloc(rrset->rri_nsigs,
- sizeof(struct rdatainfo));
- if (rrset->rri_sigs == NULL) {
- result = ERRSET_NOMEMORY;
- goto fail;
- }
- for (i = 0; i < rrset->rri_nsigs; i++) {
- rrset->rri_sigs[i].rdi_length = response->siglen[i];
- rrset->rri_sigs[i].rdi_data =
- sane_malloc(rrset->rri_sigs[i].rdi_length);
- if (rrset->rri_sigs[i].rdi_data == NULL) {
- result = ERRSET_NOMEMORY;
- goto fail;
- }
- memcpy(rrset->rri_sigs[i].rdi_data, response->sigs[i],
- rrset->rri_sigs[i].rdi_length);
- }
-
- lwres_grbnresponse_free(lwrctx, &response);
- lwres_conf_clear(lwrctx);
- lwres_context_destroy(&lwrctx);
- *res = rrset;
- return (ERRSET_SUCCESS);
- fail:
- if (rrset != NULL)
- lwres_freerrset(rrset);
- if (response != NULL)
- lwres_grbnresponse_free(lwrctx, &response);
- if (lwrctx != NULL) {
- lwres_conf_clear(lwrctx);
- lwres_context_destroy(&lwrctx);
- }
- return (result);
-}
-
-/*% Releases memory allocated for the dynamically allocated structures created by a successful call to lwres_getrrsetbyname(). */
-void
-lwres_freerrset(struct rrsetinfo *rrset) {
- unsigned int i;
- if (rrset->rri_rdatas != NULL) {
- for (i = 0; i < rrset->rri_nrdatas; i++) {
- if (rrset->rri_rdatas[i].rdi_data == NULL)
- break;
- free(rrset->rri_rdatas[i].rdi_data);
- }
- free(rrset->rri_rdatas);
- }
- if (rrset->rri_sigs != NULL) {
- for (i = 0; i < rrset->rri_nsigs; i++) {
- if (rrset->rri_sigs[i].rdi_data == NULL)
- break;
- free(rrset->rri_sigs[i].rdi_data);
- }
- free(rrset->rri_sigs);
- }
- free(rrset->rri_name);
- free(rrset);
-}
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