--- /dev/null
+/*
+ * Copyright (c) 2012-2018, JANET(UK)
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of JANET(UK) nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <jansson.h>
+#include <talloc.h>
+
+#include <tr_constraint_internal.h>
+#include <tr_cfgwatch.h>
+#include <tr_debug.h>
+
+#if JANSSON_VERSION_HEX < 0x020500
+#include "jansson_iterators.h"
+#endif
+
+static TR_CONSTRAINT *tr_cfg_parse_one_constraint(TALLOC_CTX *mem_ctx, const char *ctype, json_t *jc, TR_CFG_RC *rc)
+{
+ TR_CONSTRAINT *cons=NULL;
+ size_t i=0;
+
+ if (!rc) {
+ tr_err("tr_cfg_parse_one_constraint: rc is null, cannot process constraint.");
+ return NULL;
+ }
+
+ if ((!ctype) || (!jc) ||
+ (!json_is_array(jc)) ||
+ (0 >= json_array_size(jc)) ||
+ (!json_is_string(json_array_get(jc, 0)))) {
+ tr_err("tr_cfg_parse_one_constraint: config error.");
+ *rc=TR_CFG_NOPARSE;
+ return NULL;
+ }
+
+ if (NULL==(cons=tr_constraint_new(mem_ctx))) {
+ tr_debug("tr_cfg_parse_one_constraint: Out of memory (cons).");
+ *rc=TR_CFG_NOMEM;
+ return NULL;
+ }
+
+ if (NULL==(cons->type=tr_new_name(ctype))) {
+ tr_err("tr_cfg_parse_one_constraint: Out of memory (type).");
+ *rc=TR_CFG_NOMEM;
+ tr_constraint_free(cons);
+ return NULL;
+ }
+
+ for (i=0; i < json_array_size(jc); i++) {
+ if (NULL == tr_constraint_add_match(cons, tr_new_name(json_string_value(json_array_get(jc, i))))) {
+ tr_err("tr_cfg_parse_one_constraint: Out of memory (match %d).", i);
+ *rc=TR_CFG_NOMEM;
+ tr_constraint_free(cons);
+ return NULL;
+ }
+ }
+
+ return cons;
+}
+
+static TR_FILTER *tr_cfg_parse_one_filter(TALLOC_CTX *mem_ctx, json_t *jfilt, TR_FILTER_TYPE ftype, TR_CFG_RC *rc)
+{
+ TALLOC_CTX *tmp_ctx = talloc_new(NULL);
+ TR_FILTER *filt = NULL;
+ TR_FLINE *fline = NULL;
+ TR_FSPEC *fspec = NULL;
+ json_t *jfaction = NULL;
+ json_t *jfline = NULL;
+ json_t *jfspecs = NULL;
+ json_t *this_jfspec = NULL;
+ json_t *jfield = NULL;
+ json_t *jmatch = NULL;
+ json_t *jrc = NULL;
+ json_t *jdc = NULL;
+ json_t *this_jmatch = NULL;
+ TR_NAME *name = NULL;
+ size_t i = 0, j = 0, k = 0;
+
+ *rc = TR_CFG_ERROR;
+
+ if ((jfilt == NULL) || (rc == NULL)) {
+ tr_err("tr_cfg_parse_one_filter: null argument");
+ *rc = TR_CFG_BAD_PARAMS;
+ goto cleanup;
+ }
+
+ if (NULL == (filt = tr_filter_new(tmp_ctx))) {
+ tr_err("tr_cfg_parse_one_filter: Out of memory.");
+ *rc = TR_CFG_NOMEM;
+ goto cleanup;
+ }
+ tr_filter_set_type(filt, ftype);
+
+ /* For each entry in the filter... */
+ json_array_foreach(jfilt, i, jfline) {
+ if ((NULL == (jfaction = json_object_get(jfline, "action"))) ||
+ (!json_is_string(jfaction))) {
+ tr_debug("tr_cfg_parse_one_filter: Error parsing filter action.");
+ *rc = TR_CFG_NOPARSE;
+ goto cleanup;
+ }
+
+ if ((NULL == (jfspecs = json_object_get(jfline, "specs"))) ||
+ (!json_is_array(jfspecs)) ||
+ (0 == json_array_size(jfspecs))) {
+ tr_debug("tr_cfg_parse_one_filter: Error parsing filter specs.");
+ *rc = TR_CFG_NOPARSE;
+ goto cleanup;
+ }
+
+ fline = tr_fline_new(tmp_ctx);
+ if (fline == NULL) {
+ tr_debug("tr_cfg_parse_one_filter: Out of memory allocating filter line %d.", i);
+ *rc = TR_CFG_NOMEM;
+ goto cleanup;
+ }
+ if (!strcmp(json_string_value(jfaction), "accept")) {
+ fline->action = TR_FILTER_ACTION_ACCEPT;
+ tr_debug("tr_cfg_parse_one_filter: Filter action is 'accept'");
+
+ } else if (!strcmp(json_string_value(jfaction), "reject")) {
+ fline->action = TR_FILTER_ACTION_REJECT;
+ tr_debug("tr_cfg_parse_one_filter: Filter action is 'reject'");
+ } else {
+ tr_debug("tr_cfg_parse_one_filter: Error parsing filter action, unknown action '%s'.",
+ json_string_value(jfaction));
+ *rc = TR_CFG_NOPARSE;
+ goto cleanup;
+ }
+
+ if (NULL != (jrc = json_object_get(jfline, "realm_constraints"))) {
+ if (!json_is_array(jrc)) {
+ tr_err("tr_cfg_parse_one_filter: cannot parse realm_constraints, not an array.");
+ *rc = TR_CFG_NOPARSE;
+ goto cleanup;
+ } else if (json_array_size(jrc) > 0) {
+ /* ok we actually have entries to process */
+ if (NULL == (fline->realm_cons = tr_cfg_parse_one_constraint(fline, "realm", jrc, rc))) {
+ tr_debug("tr_cfg_parse_one_filter: Error parsing realm constraint");
+ *rc = TR_CFG_NOPARSE;
+ goto cleanup;
+ }
+ }
+ }
+
+ if (NULL != (jdc = json_object_get(jfline, "domain_constraints"))) {
+ if (!json_is_array(jdc)) {
+ tr_err("tr_cfg_parse_one_filter: cannot parse domain_constraints, not an array.");
+ *rc = TR_CFG_NOPARSE;
+ goto cleanup;
+ } else if (json_array_size(jdc) > 0) {
+ if (NULL == (fline->domain_cons = tr_cfg_parse_one_constraint(fline, "domain", jdc, rc))) {
+ tr_debug("tr_cfg_parse_one_filter: Error parsing domain constraint");
+ *rc = TR_CFG_NOPARSE;
+ goto cleanup;
+ }
+ }
+ }
+
+ /*For each filter spec within the filter line... */
+ tr_debug("tr_cfg_parse_one_filter: Filter line has %d spec(s)", json_array_size(jfspecs));
+ json_array_foreach(jfspecs, j, this_jfspec) {
+ if ((NULL == (jfield = json_object_get(this_jfspec, "field"))) ||
+ (!json_is_string(jfield))) {
+ tr_debug("tr_cfg_parse_one_filter: Error parsing filter: missing field for filer spec %d, filter line %d.", i,
+ j);
+ *rc = TR_CFG_NOPARSE;
+ goto cleanup;
+ }
+
+ /* check that we have a match attribute */
+ if (NULL == (jmatch = json_object_get(this_jfspec, "match"))) {
+ tr_debug("tr_cfg_parse_one_filter: Error parsing filter: missing match for filer spec %d, filter line %d.", i,
+ j);
+ *rc = TR_CFG_NOPARSE;
+ goto cleanup;
+ }
+
+ /* check that match is a string or an array */
+ if ((!json_is_string(jmatch)) && (!json_is_array(jmatch))) {
+ tr_debug(
+ "tr_cfg_parse_one_filter: Error parsing filter: match not a string or array for filter spec %d, filter line %d.",
+ i, j);
+ *rc = TR_CFG_NOPARSE;
+ goto cleanup;
+ }
+
+ /* allocate the filter spec */
+ if (NULL == (fspec = tr_fspec_new(fline))) {
+ tr_debug("tr_cfg_parse_one_filter: Out of memory.");
+ *rc = TR_CFG_NOMEM;
+ goto cleanup;
+ }
+
+ /* fill in the field */
+ if (NULL == (fspec->field = tr_new_name(json_string_value(jfield)))) {
+ tr_debug("tr_cfg_parse_one_filter: Out of memory.");
+ *rc = TR_CFG_NOMEM;
+ goto cleanup;
+ }
+
+ /* fill in the matches */
+ if (json_is_string(jmatch)) {
+ if (NULL == (name = tr_new_name(json_string_value(jmatch)))) {
+ tr_debug("tr_cfg_parse_one_filter: Out of memory.");
+ *rc = TR_CFG_NOMEM;
+ goto cleanup;
+ }
+ tr_fspec_add_match(fspec, name);
+ } else {
+ /* jmatch is an array (we checked earlier) */
+ json_array_foreach(jmatch, k, this_jmatch) {
+ if (NULL == (name = tr_new_name(json_string_value(this_jmatch)))) {
+ tr_debug("tr_cfg_parse_one_filter: Out of memory.");
+ *rc = TR_CFG_NOMEM;
+ goto cleanup;
+ }
+ tr_fspec_add_match(fspec, name);
+ }
+ }
+ if (!tr_filter_validate_spec_field(ftype, fspec)) {
+ tr_debug("tr_cfg_parse_one_filter: Invalid filter field \"%.*s\" for %s filter, spec %d, filter %d.",
+ fspec->field->len,
+ fspec->field->buf,
+ tr_filter_type_to_string(filt->type),
+ i, j);
+ *rc = TR_CFG_ERROR;
+ goto cleanup;
+ }
+
+ if (tr_fline_add_spec(fline, fspec) == NULL) {
+ tr_debug("tr_cfg_parse_one_filter: Unable to add spec %d to line %d of %s filter.",
+ j, i, tr_filter_type_to_string(filt->type));
+ }
+ }
+
+ if (NULL == tr_filter_add_line(filt, fline)) {
+ tr_debug("tr_cfg_parse_one_filter: Error adding line %d for %s filter",
+ i, tr_filter_type_to_string(filt->type));
+ *rc = TR_CFG_NOMEM;
+ goto cleanup;
+ }
+ tr_debug("tr_cfg_parse_one_filter: Added line %d to %s filter", i, tr_filter_type_to_string(filt->type));
+ }
+
+ /* check that the filter is valid */
+ if (!tr_filter_validate(filt)) {
+ *rc = TR_CFG_ERROR;
+ } else {
+ *rc = TR_CFG_SUCCESS;
+ talloc_steal(mem_ctx, filt);
+ }
+
+cleanup:
+ talloc_free(tmp_ctx);
+ if (*rc!=TR_CFG_SUCCESS)
+ filt=NULL;
+ return filt;
+}
+
+TR_FILTER_SET *tr_cfg_parse_filters(TALLOC_CTX *mem_ctx, json_t *jfilts, TR_CFG_RC *rc)
+{
+ TALLOC_CTX *tmp_ctx=talloc_new(NULL);
+ json_t *jfilt;
+ const char *filt_label=NULL;
+ TR_FILTER *filt=NULL;
+ TR_FILTER_SET *filt_set=NULL;
+ TR_FILTER_TYPE filt_type=TR_FILTER_TYPE_UNKNOWN;
+
+ *rc=TR_CFG_ERROR;
+
+ /* no filters */
+ if (jfilts==NULL) {
+ *rc=TR_CFG_SUCCESS;
+ goto cleanup;
+ }
+
+ filt_set=tr_filter_set_new(tmp_ctx);
+ if (filt_set==NULL) {
+ tr_debug("tr_cfg_parse_filters: Unable to allocate filter set.");
+ *rc = TR_CFG_NOMEM;
+ goto cleanup;
+ }
+
+ json_object_foreach(jfilts, filt_label, jfilt) {
+ /* check that we got a filter */
+ if (jfilt == NULL) {
+ tr_debug("tr_cfg_parse_filters: Definition for %s filter is missing.", filt_label);
+ *rc = TR_CFG_NOPARSE;
+ goto cleanup;
+ }
+
+ /* check that we recognize the filter type */
+ filt_type=tr_filter_type_from_string(filt_label);
+ if (filt_type==TR_FILTER_TYPE_UNKNOWN) {
+ tr_debug("tr_cfg_parse_filters: Unrecognized filter (%s) defined.", filt_label);
+ *rc = TR_CFG_NOPARSE;
+ goto cleanup;
+ }
+
+ /* finally, parse the filter */
+ tr_debug("tr_cfg_parse_filters: Found %s filter.", filt_label);
+ filt = tr_cfg_parse_one_filter(tmp_ctx, jfilt, filt_type, rc);
+ if (*rc != TR_CFG_SUCCESS) {
+ tr_debug("tr_cfg_parse_filters: Error parsing %s filter.", filt_label);
+ *rc = TR_CFG_NOPARSE;
+ goto cleanup;
+ }
+ if (tr_filter_set_add(filt_set, filt) != 0) {
+ tr_debug("tr_cfg_parse_filters: Error adding %s filter to filter set.", filt_label);
+ *rc = TR_CFG_NOPARSE;
+ goto cleanup;
+ }
+ }
+
+ *rc=TR_CFG_SUCCESS;
+
+cleanup:
+ if (*rc==TR_CFG_SUCCESS)
+ talloc_steal(mem_ctx, filt_set);
+ else if (filt_set!=NULL) {
+ talloc_free(filt_set);
+ filt_set=NULL;
+ }
+
+ talloc_free(tmp_ctx);
+ return filt_set;
+}
projects / trust_router.git / blobdiff