/*
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Copyright (c) 2019 Roger Light <roger@atchoo.org>
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All rights reserved. This program and the accompanying materials
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are made available under the terms of the Eclipse Public License v1.0
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and Eclipse Distribution License v1.0 which accompany this distribution.
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The Eclipse Public License is available at
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http://www.eclipse.org/legal/epl-v10.html
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and the Eclipse Distribution License is available at
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http://www.eclipse.org/org/documents/edl-v10.php.
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Contributors:
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Roger Light - initial implementation and documentation.
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*/
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#include "config.h"
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#include "mosquitto_broker_internal.h"
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#include "mqtt_protocol.h"
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#include "memory_mosq.h"
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#include "packet_mosq.h"
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#include "property_mosq.h"
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#include "util_mosq.h"
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int send__auth(struct mosquitto_db *db, struct mosquitto *context, int reason_code, const void *auth_data, uint16_t auth_data_len)
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{
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struct mosquitto__packet *packet = NULL;
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int rc;
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mosquitto_property *properties = NULL;
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int proplen, varbytes;
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uint32_t remaining_length;
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if(context->auth_method == NULL) return MOSQ_ERR_INVAL;
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if(context->protocol != mosq_p_mqtt5) return MOSQ_ERR_PROTOCOL;
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log__printf(NULL, MOSQ_LOG_DEBUG, "Sending AUTH to %s (rc%d, %s)", context->id, reason_code, context->auth_method);
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remaining_length = 1;
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rc = mosquitto_property_add_string(&properties, MQTT_PROP_AUTHENTICATION_METHOD, context->auth_method);
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if(rc){
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mosquitto_property_free_all(&properties);
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return rc;
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}
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if(auth_data != NULL && auth_data_len > 0){
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rc = mosquitto_property_add_binary(&properties, MQTT_PROP_AUTHENTICATION_DATA, auth_data, auth_data_len);
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if(rc){
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mosquitto_property_free_all(&properties);
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return rc;
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}
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}
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proplen = property__get_length_all(properties);
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varbytes = packet__varint_bytes(proplen);
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remaining_length += proplen + varbytes;
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if(packet__check_oversize(context, remaining_length)){
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mosquitto_property_free_all(&properties);
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mosquitto__free(packet);
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return MOSQ_ERR_OVERSIZE_PACKET;
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}
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packet = mosquitto__calloc(1, sizeof(struct mosquitto__packet));
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if(!packet) return MOSQ_ERR_NOMEM;
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packet->command = CMD_AUTH;
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packet->remaining_length = remaining_length;
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rc = packet__alloc(packet);
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if(rc){
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mosquitto_property_free_all(&properties);
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mosquitto__free(packet);
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return rc;
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}
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packet__write_byte(packet, reason_code);
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property__write_all(packet, properties, true);
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mosquitto_property_free_all(&properties);
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return packet__queue(context, packet);
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}
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