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/*
* $Id$
*
* DNSSEC module
*
* Copyright (C) 2013 mariuszbi@gmail.com
*
* This file is part of Kamailio, a free SIP server.
*
* Kamailio is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version
*
* Kamailio is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* History:
* --------
* 2013-03 initial implementation
*/
#include <validator/validator-config.h>
#include <validator/validator.h>
#include <validator/resolver.h>
#include "../../dprint.h"
#include "dnssec_func.h"
static struct libval_context *libval_ctx = NULL;
static unsigned int context_flags = 0;
unsigned int
set_context_flags(unsigned int flags) {
#define CHECK_AND_SET(flag) \
if ((flag & flags) != 0) {\
context_flags |= VAL_##flag;\
LOG(L_INFO, "setting param %s\n", #flag);\
}
unsigned int old_flags = context_flags;
context_flags = 0;
CHECK_AND_SET(QUERY_DONT_VALIDATE);
CHECK_AND_SET(QUERY_IGNORE_SKEW);
CHECK_AND_SET(QUERY_AC_DETAIL);
CHECK_AND_SET(QUERY_NO_DLV);
CHECK_AND_SET(QUERY_NO_EDNS0_FALLBACK);
CHECK_AND_SET(QUERY_RECURSE);
CHECK_AND_SET(QUERY_SKIP_RESOLVER);
CHECK_AND_SET(QUERY_SKIP_CACHE);
return old_flags;
}
static inline int
dnssec_init_context(void) {
if (libval_ctx == NULL) {
if (val_create_context(NULL, &libval_ctx) != VAL_NO_ERROR)
return -1;
if (context_flags != 0) {
val_context_setqflags(libval_ctx, VAL_CTX_FLAG_SET, context_flags);
}
}
return 0;
}
struct hostent *
dnssec_gethostbyname(const char *name) {
val_status_t val_status;
struct hostent * res;
if (dnssec_init_context())
return NULL;
LOG(L_INFO, " gethostbyname(%s) called: wrapper\n", name);
res = val_gethostbyname(libval_ctx, name, &val_status);
if (val_istrusted(val_status) && !val_does_not_exist(val_status)) {
return res;
}
return NULL;
}
struct hostent *
dnssec_gethostbyname2(const char *name, int family) {
val_status_t val_status;
struct hostent * res;
if (dnssec_init_context())
return NULL;
LOG(L_INFO, " gethostbyname2(%s) called: wrapper\n", name);
res = val_gethostbyname2(libval_ctx, name, family, &val_status);
if (val_istrusted(val_status) && !val_does_not_exist(val_status)) {
return res;
}
return NULL;
}
int
dnssec_res_init(void) {
LOG(L_INFO, "res_init called: wrapper\n");
return dnssec_init_context();
}
int
dnssec_res_destroy(void) {
LOG(L_INFO, "destroying dnssec context\n");
val_free_context(libval_ctx);
libval_ctx = NULL;
return 0;
}
int
dnssec_res_search(const char *dname, int class_h, int type_h,
unsigned char *answer, int anslen) {
val_status_t val_status;
int ret;
if (dnssec_init_context())
return -1;
LOG(L_INFO, "res_query(%s,%d,%d) called: wrapper\n",
dname, class_h, type_h);
ret = val_res_search(libval_ctx, dname, class_h, type_h, answer, anslen,
&val_status);
if (val_istrusted(val_status) && !val_does_not_exist(val_status)) {
return ret;
} else {
LOG(L_INFO, "invalid domain %s reason %s\n", dname, p_val_status(val_status));
}
return -1;
}
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