aclconf.c revision 15a44745412679c30a6d022733925af70a38b715
/*
* Copyright (C) 1999, 2000 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.
*/
/* $Id: aclconf.c,v 1.19 2000/07/27 09:45:50 tale Exp $ */
#include <config.h>
#include <isc/string.h> /* Required for HP/UX (and others?) */
#include <isc/util.h>
#include <dns/acl.h>
#include <dns/aclconf.h>
#include <dns/fixedname.h>
#include <dns/log.h>
void
dns_aclconfctx_init(dns_aclconfctx_t *ctx) {
ISC_LIST_INIT(ctx->named_acl_cache);
}
void
dns_aclconfctx_destroy(dns_aclconfctx_t *ctx) {
dns_acl_t *dacl, *next;
for (dacl = ISC_LIST_HEAD(ctx->named_acl_cache);
dacl != NULL;
dacl = next)
{
next = ISC_LIST_NEXT(dacl, nextincache);
dacl->name = NULL;
dns_acl_detach(&dacl);
}
}
static isc_result_t
convert_named_acl(char *aclname, dns_c_ctx_t *cctx,
dns_aclconfctx_t *ctx, isc_mem_t *mctx,
dns_acl_t **target)
{
isc_result_t result;
dns_c_acl_t *cacl;
dns_acl_t *dacl;
/* Look for an already-converted version. */
for (dacl = ISC_LIST_HEAD(ctx->named_acl_cache);
dacl != NULL;
dacl = ISC_LIST_NEXT(dacl, nextincache))
{
if (strcmp(aclname, dacl->name) == 0) {
dns_acl_attach(dacl, target);
return ISC_R_SUCCESS;
}
}
/* Not yet converted. Convert now. */
result = dns_c_acltable_getacl(cctx->acls, aclname, &cacl);
if (result != ISC_R_SUCCESS) {
isc_log_write(dns_lctx, DNS_LOGCATEGORY_SECURITY,
DNS_LOGMODULE_ACL, ISC_LOG_WARNING,
"undefined ACL '%s'", aclname);
return (result);
}
result = dns_acl_fromconfig(cacl->ipml, cctx, ctx, mctx, &dacl);
if (result != ISC_R_SUCCESS)
return (result);
dacl->name = aclname;
ISC_LIST_APPEND(ctx->named_acl_cache, dacl, nextincache);
dns_acl_attach(dacl, target);
return (ISC_R_SUCCESS);
}
static isc_result_t
convert_keyname(char *txtname, isc_mem_t *mctx, dns_name_t *dnsname) {
isc_result_t result;
isc_buffer_t buf;
dns_fixedname_t fixname;
unsigned int keylen;
keylen = strlen(txtname);
isc_buffer_init(&buf, txtname, keylen);
isc_buffer_add(&buf, keylen);
dns_fixedname_init(&fixname);
result = dns_name_fromtext(dns_fixedname_name(&fixname), &buf,
dns_rootname, ISC_FALSE, NULL);
if (result != ISC_R_SUCCESS) {
isc_log_write(dns_lctx, DNS_LOGCATEGORY_SECURITY,
DNS_LOGMODULE_ACL, ISC_LOG_WARNING,
"key name \"%s\" is not a valid domain name",
txtname);
return (result);
}
return (dns_name_dup(dns_fixedname_name(&fixname), mctx, dnsname));
}
isc_result_t
dns_acl_fromconfig(dns_c_ipmatchlist_t *caml,
dns_c_ctx_t *cctx,
dns_aclconfctx_t *ctx,
isc_mem_t *mctx,
dns_acl_t **target)
{
isc_result_t result;
unsigned int count;
dns_acl_t *dacl = NULL;
dns_aclelement_t *de;
dns_c_ipmatchelement_t *ce;
REQUIRE(target != NULL && *target == NULL);
count = 0;
for (ce = ISC_LIST_HEAD(caml->elements);
ce != NULL;
ce = ISC_LIST_NEXT(ce, next))
count++;
result = dns_acl_create(mctx, count, &dacl);
if (result != ISC_R_SUCCESS)
return (result);
de = dacl->elements;
for (ce = ISC_LIST_HEAD(caml->elements);
ce != NULL;
ce = ISC_LIST_NEXT(ce, next))
{
de->negative = dns_c_ipmatchelement_isneg(ce);
switch (ce->type) {
case dns_c_ipmatch_pattern:
de->type = dns_aclelementtype_ipprefix;
isc_netaddr_fromsockaddr(&de->u.ip_prefix.address,
&ce->u.direct.address);
/* XXX "mask" is a misnomer */
de->u.ip_prefix.prefixlen = ce->u.direct.mask;
break;
case dns_c_ipmatch_key:
de->type = dns_aclelementtype_keyname;
dns_name_init(&de->u.keyname, NULL);
result = convert_keyname(ce->u.key, mctx,
&de->u.keyname);
if (result != ISC_R_SUCCESS)
goto cleanup;
break;
case dns_c_ipmatch_indirect:
de->type = dns_aclelementtype_nestedacl;
result = dns_acl_fromconfig(ce->u.indirect.list,
cctx, ctx, mctx,
&de->u.nestedacl);
if (result != ISC_R_SUCCESS)
goto cleanup;
break;
case dns_c_ipmatch_localhost:
de->type = dns_aclelementtype_localhost;
break;
case dns_c_ipmatch_any:
de->type = dns_aclelementtype_any;
break;
case dns_c_ipmatch_localnets:
de->type = dns_aclelementtype_localnets;
break;
case dns_c_ipmatch_acl:
de->type = dns_aclelementtype_nestedacl;
result = convert_named_acl(ce->u.aclname,
cctx, ctx, mctx,
&de->u.nestedacl);
if (result != ISC_R_SUCCESS)
goto cleanup;
break;
default:
isc_log_write(dns_lctx, DNS_LOGCATEGORY_SECURITY,
DNS_LOGMODULE_ACL, ISC_LOG_WARNING,
"address match list contains "
"unsupported element type");
result = ISC_R_FAILURE;
goto cleanup;
}
de++;
dacl->length++;
}
*target = dacl;
return (ISC_R_SUCCESS);
cleanup:
dns_acl_detach(&dacl);
return (result);
}