401 lines
9.6 KiB
C
401 lines
9.6 KiB
C
/*******************************************************************************
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OpenAirInterface
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Copyright(c) 1999 - 2014 Eurecom
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OpenAirInterface is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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OpenAirInterface is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with OpenAirInterface.The full GNU General Public License is
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included in this distribution in the file called "COPYING". If not,
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see <http://www.gnu.org/licenses/>.
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Contact Information
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OpenAirInterface Admin: openair_admin@eurecom.fr
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OpenAirInterface Tech : openair_tech@eurecom.fr
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OpenAirInterface Dev : openair4g-devel@lists.eurecom.fr
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Address : Eurecom, Compus SophiaTech 450, route des chappes, 06451 Biot, France.
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*******************************************************************************/
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/*! \file enb_agent_common_internal.c
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* \brief internal functions for common message primitves and utilities
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* \author Xenofon Foukas
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* \date 2016
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* \version 0.1
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*/
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#include <stdlib.h>
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#include <string.h>
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#include "enb_agent_common_internal.h"
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#include "enb_agent_mac_internal.h"
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int apply_reconfiguration_policy(mid_t mod_id, const char *policy, size_t policy_length) {
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yaml_parser_t parser;
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yaml_event_t event;
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int done = 0;
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int mapping_started = 0;
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LOG_I(ENB_APP, "Time to apply a new policy \n");
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yaml_parser_initialize(&parser);
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yaml_parser_set_input_string(&parser, policy, strlen(policy));
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while (!done) {
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if (!yaml_parser_parse(&parser, &event))
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goto error;
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switch (event.type) {
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case YAML_STREAM_START_EVENT:
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case YAML_STREAM_END_EVENT:
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case YAML_DOCUMENT_START_EVENT:
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case YAML_DOCUMENT_END_EVENT:
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break;
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case YAML_MAPPING_START_EVENT:
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mapping_started = 1;
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break;
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case YAML_MAPPING_END_EVENT:
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mapping_started = 0;
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break;
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case YAML_SCALAR_EVENT:
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// Check the system name and call the proper handler
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if (strcmp(event.data.scalar.value, "mac") == 0) {
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LOG_D(ENB_APP, "This is intended for the mac system\n");
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// Call the mac handler
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if (parse_mac_config(mod_id, &parser) == -1) {
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goto error;
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}
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} else if (strcmp(event.data.scalar.value, "rlc") == 0) {
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// Call the RLC handler
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LOG_D(ENB_APP, "This is intended for the rlc system\n");
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// TODO : Just skip it for now
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if (skip_system_section(&parser) == -1) {
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goto error;
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}
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} else if (strcmp(event.data.scalar.value, "pdcp") == 0) {
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// Call the PDCP handler
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LOG_D(ENB_APP, "This is intended for the pdcp system\n");
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// TODO : Just skip it for now
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if (skip_system_section(&parser) == -1) {
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goto error;
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}
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} else if (strcmp(event.data.scalar.value, "rrc") == 0) {
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// Call the RRC handler
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LOG_D(ENB_APP, "This is intended for the rrc system\n");
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// TODO : Just skip it for now
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if (skip_system_section(&parser) == -1) {
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goto error;
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}
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} else {
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goto error;
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}
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break;
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default:
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// We are not expecting to find any other type of event at this level
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// of the hierarchy
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yaml_event_delete(&event);
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goto error;
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}
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done = (event.type == YAML_STREAM_END_EVENT);
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yaml_event_delete(&event);
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}
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return 0;
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error:
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yaml_parser_delete(&parser);
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return -1;
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}
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int skip_system_section(yaml_parser_t *parser) {
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yaml_event_t event;
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int done = 0;
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int sequence_started = 0;
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int mapping_started = 0;
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while (!done) {
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if (!yaml_parser_parse(parser, &event))
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goto error;
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switch (event.type) {
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case YAML_SEQUENCE_START_EVENT:
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LOG_D(ENB_APP, "A sequence just started as expected\n");
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sequence_started = 1;
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break;
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case YAML_SEQUENCE_END_EVENT:
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LOG_D(ENB_APP, "A sequence ended\n");
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sequence_started = 0;
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break;
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case YAML_MAPPING_START_EVENT:
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if (!sequence_started) {
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goto error;
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}
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LOG_D(ENB_APP, "A mapping started\n");
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mapping_started = 1;
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break;
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case YAML_MAPPING_END_EVENT:
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if (!mapping_started) {
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goto error;
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}
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LOG_D(ENB_APP, "A mapping ended\n");
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mapping_started = 0;
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break;
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case YAML_SCALAR_EVENT:
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if (!mapping_started) {
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goto error;
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}
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// Entered a subsystem section. Let's skip it
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if (skip_subsystem_section(parser) == -1) {
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goto error;
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}
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}
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done = (event.type == YAML_SEQUENCE_END_EVENT);
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yaml_event_delete(&event);
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}
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return 0;
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error:
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yaml_event_delete(&event);
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return -1;
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}
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int skip_subsystem_section(yaml_parser_t *parser) {
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yaml_event_t event;
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int done = 0;
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int mapping_started = 0;
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while (!done) {
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if (!yaml_parser_parse(parser, &event))
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goto error;
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switch (event.type) {
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case YAML_MAPPING_START_EVENT:
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LOG_D(ENB_APP, "The mapping of the subsystem started\n");
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mapping_started = 1;
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break;
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case YAML_MAPPING_END_EVENT:
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LOG_D(ENB_APP, "The mapping of the subsystem ended\n");
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mapping_started = 0;
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break;
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case YAML_SCALAR_EVENT:
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if (!mapping_started) {
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goto error;
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}
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// Check what key needs to be set
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if (strcmp(event.data.scalar.value, "behavior") == 0) {
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LOG_D(ENB_APP, "Skipping the behavior attribute\n");
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yaml_event_delete(&event);
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if (!yaml_parser_parse(parser, &event)) {
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goto error;
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}
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if (event.type == YAML_SCALAR_EVENT) {
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break;
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} else {
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goto error;
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}
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} else if (strcmp(event.data.scalar.value, "parameters") == 0) {
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LOG_D(ENB_APP, "Skipping the parameters for this subsystem\n");
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if (skip_subsystem_parameters_config(parser) == -1) {
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goto error;
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}
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}
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break;
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default:
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goto error;
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}
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done = (event.type == YAML_MAPPING_END_EVENT);
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yaml_event_delete(&event);
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}
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return 0;
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error:
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yaml_event_delete(&event);
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return -1;
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}
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int skip_subsystem_parameters_config(yaml_parser_t *parser) {
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yaml_event_t event;
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void *param;
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int done = 0;
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int mapping_started = 0;
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while (!done) {
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if (!yaml_parser_parse(parser, &event))
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goto error;
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switch (event.type) {
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// We are expecting a mapping of parameters
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case YAML_MAPPING_START_EVENT:
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LOG_D(ENB_APP, "The mapping of the parameters started\n");
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mapping_started = 1;
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break;
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case YAML_MAPPING_END_EVENT:
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LOG_D(ENB_APP, "The mapping of the parameters ended\n");
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mapping_started = 0;
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break;
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case YAML_SCALAR_EVENT:
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if (!mapping_started) {
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goto error;
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}
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// Check what key needs to be set
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LOG_D(ENB_APP, "Skipping parameter %s\n", event.data.scalar.value);
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if (skip_parameter_modification(parser) == -1 ) {
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goto error;
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}
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break;
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default:
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goto error;
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}
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done = (event.type == YAML_MAPPING_END_EVENT);
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yaml_event_delete(&event);
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}
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return 0;
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error:
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yaml_event_delete(&event);
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return -1;
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}
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int skip_parameter_modification(yaml_parser_t *parser) {
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yaml_event_t event;
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int done = 0;
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int is_array = 0;
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int i = 0;
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while (!done) {
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if (!yaml_parser_parse(parser, &event)) {
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goto error;
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}
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// Expecting either a scalar or a sequence
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switch (event.type) {
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case YAML_SEQUENCE_START_EVENT:
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is_array = 1;
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break;
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case YAML_SCALAR_EVENT:
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if ((strcmp(event.data.scalar.tag, YAML_INT_TAG) == 0) ||
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(strcmp(event.data.scalar.tag, YAML_FLOAT_TAG) == 0) ||
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(strcmp(event.data.scalar.tag, YAML_STR_TAG) == 0) ||
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(strcmp(event.data.scalar.tag, YAML_BOOL_TAG) == 0)) {
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// Do nothing
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} else {
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// No other type is supported at the moment, so it should be considered an error
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// if we reach here
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goto error;
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}
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if (is_array) {
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i++;
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} else {
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done = 1;
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}
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break;
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case YAML_SEQUENCE_END_EVENT:
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done = 1;
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break;
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default:
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goto error;
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}
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yaml_event_delete(&event);
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}
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return 0;
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error:
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yaml_event_delete(&event);
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return -1;
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}
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int apply_parameter_modification(void *parameter, yaml_parser_t *parser) {
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yaml_event_t event;
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int done = 0;
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int is_array = 0;
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int i = 0;
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char *endptr;
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while (!done) {
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if (!yaml_parser_parse(parser, &event)) {
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goto error;
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}
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// Expecting either a scalar or a sequence
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switch (event.type) {
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case YAML_SEQUENCE_START_EVENT:
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is_array = 1;
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break;
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case YAML_SCALAR_EVENT:
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if (strcmp(event.data.scalar.tag, YAML_INT_TAG) == 0) {
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((int *) parameter)[i] = strtol(event.data.scalar.value, &endptr, 10);
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} else if (strcmp(event.data.scalar.tag, YAML_FLOAT_TAG) == 0) {
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((float *) parameter)[i] = strtof(event.data.scalar.value, &endptr);
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} else if (strcmp(event.data.scalar.tag, YAML_STR_TAG) == 0) {
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strncpy(&((char *) parameter)[i], event.data.scalar.value, event.data.scalar.length);
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} else if (strcmp(event.data.scalar.tag, YAML_BOOL_TAG) == 0) {
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if (strcmp(event.data.scalar.value, "true") == 0) {
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((int *) parameter)[i] = 1;
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} else {
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((int *) parameter)[i] = 0;
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}
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} else {
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// No other type is supported at the moment, so it should be considered an error
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// if we reach here
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goto error;
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}
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if (is_array) {
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i++;
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} else {
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done = 1;
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}
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break;
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case YAML_SEQUENCE_END_EVENT:
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done = 1;
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break;
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default:
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goto error;
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}
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yaml_event_delete(&event);
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}
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return 0;
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error:
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yaml_event_delete(&event);
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return -1;
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}
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