296 lines
9.2 KiB
C
296 lines
9.2 KiB
C
/*
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* Copyright (c) 2015-2018, Yanzi Networks AB.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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* \addtogroup lwm2m
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* @{
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*
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*/
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/**
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* \file
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* Implementation of the Contiki OMA LWM2M server
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* \author
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* Joakim Eriksson <joakime@sics.se>
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* Niclas Finne <nfi@sics.se>
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*/
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#include <stdint.h>
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#include "lib/list.h"
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#include "lwm2m-object.h"
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#include "lwm2m-engine.h"
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#include "lwm2m-server.h"
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#include "lwm2m-rd-client.h"
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/* Log configuration */
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#include "coap-log.h"
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#define LOG_MODULE "lwm2m-srv"
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#define LOG_LEVEL LOG_LEVEL_LWM2M
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#define MAX_COUNT LWM2M_SERVER_MAX_COUNT
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static lwm2m_status_t lwm2m_callback(lwm2m_object_instance_t *object,
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lwm2m_context_t *ctx);
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static lwm2m_object_instance_t *create_instance(uint16_t instance_id,
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lwm2m_status_t *status);
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static int delete_instance(uint16_t instance_id, lwm2m_status_t *status);
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static lwm2m_object_instance_t *get_first(lwm2m_status_t *status);
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static lwm2m_object_instance_t *get_next(lwm2m_object_instance_t *instance,
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lwm2m_status_t *status);
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static lwm2m_object_instance_t *get_by_id(uint16_t instance_id,
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lwm2m_status_t *status);
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static const lwm2m_resource_id_t resources[] = {
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RO(LWM2M_SERVER_SHORT_SERVER_ID),
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RW(LWM2M_SERVER_LIFETIME_ID),
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EX(LWM2M_SERVER_REG_UPDATE_TRIGGER_ID)
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};
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static const lwm2m_object_impl_t impl = {
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.object_id = LWM2M_OBJECT_SERVER_ID,
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.get_first = get_first,
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.get_next = get_next,
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.get_by_id = get_by_id,
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.create_instance = create_instance,
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.delete_instance = delete_instance,
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};
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static lwm2m_object_t server_object = {
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.impl = &impl,
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};
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LIST(server_list);
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static lwm2m_server_t server_instances[MAX_COUNT];
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/*---------------------------------------------------------------------------*/
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static lwm2m_object_instance_t *
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create_instance(uint16_t instance_id, lwm2m_status_t *status)
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{
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lwm2m_object_instance_t *instance;
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int i;
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instance = get_by_id(instance_id, NULL);
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if(instance != NULL) {
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/* An instance with this id is already registered */
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if(status) {
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*status = LWM2M_STATUS_OPERATION_NOT_ALLOWED;
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}
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return NULL;
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}
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for(i = 0; i < MAX_COUNT; i++) {
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if(server_instances[i].instance.instance_id == LWM2M_OBJECT_INSTANCE_NONE) {
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server_instances[i].instance.callback = lwm2m_callback;
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server_instances[i].instance.object_id = LWM2M_OBJECT_SERVER_ID;
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server_instances[i].instance.instance_id = instance_id;
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server_instances[i].instance.resource_ids = resources;
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server_instances[i].instance.resource_count =
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sizeof(resources) / sizeof(lwm2m_resource_id_t);
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server_instances[i].server_id = 0;
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server_instances[i].lifetime = 0;
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list_add(server_list, &server_instances[i].instance);
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if(status) {
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*status = LWM2M_STATUS_OK;
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}
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return &server_instances[i].instance;
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}
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}
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if(status) {
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*status = LWM2M_STATUS_SERVICE_UNAVAILABLE;
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}
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return NULL;
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}
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/*---------------------------------------------------------------------------*/
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static int
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delete_instance(uint16_t instance_id, lwm2m_status_t *status)
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{
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lwm2m_object_instance_t *instance;
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if(status) {
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*status = LWM2M_STATUS_OK;
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}
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if(instance_id == LWM2M_OBJECT_INSTANCE_NONE) {
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/* Remove all instances */
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while((instance = list_pop(server_list)) != NULL) {
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instance->instance_id = LWM2M_OBJECT_INSTANCE_NONE;
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}
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return 1;
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}
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instance = get_by_id(instance_id, NULL);
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if(instance != NULL) {
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instance->instance_id = LWM2M_OBJECT_INSTANCE_NONE;
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list_remove(server_list, instance);
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return 1;
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}
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return 0;
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}
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/*---------------------------------------------------------------------------*/
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static lwm2m_object_instance_t *
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get_first(lwm2m_status_t *status)
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{
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if(status) {
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*status = LWM2M_STATUS_OK;
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}
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return list_head(server_list);
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}
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/*---------------------------------------------------------------------------*/
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static lwm2m_object_instance_t *
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get_next(lwm2m_object_instance_t *instance, lwm2m_status_t *status)
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{
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if(status) {
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*status = LWM2M_STATUS_OK;
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}
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return instance == NULL ? NULL : instance->next;
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}
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/*---------------------------------------------------------------------------*/
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static lwm2m_object_instance_t *
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get_by_id(uint16_t instance_id, lwm2m_status_t *status)
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{
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lwm2m_object_instance_t *instance;
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if(status) {
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*status = LWM2M_STATUS_OK;
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}
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for(instance = list_head(server_list);
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instance != NULL;
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instance = instance->next) {
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if(instance->instance_id == instance_id) {
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return instance;
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}
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}
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return NULL;
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}
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/*---------------------------------------------------------------------------*/
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static lwm2m_status_t
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lwm2m_callback(lwm2m_object_instance_t *object,
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lwm2m_context_t *ctx)
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{
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int32_t value;
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lwm2m_server_t *server;
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server = (lwm2m_server_t *) object;
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if(ctx->operation == LWM2M_OP_WRITE) {
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LOG_DBG("Write to: %d\n", ctx->resource_id);
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switch(ctx->resource_id) {
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case LWM2M_SERVER_LIFETIME_ID:
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lwm2m_object_read_int(ctx, ctx->inbuf->buffer, ctx->inbuf->size, &value);
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server->lifetime = value;
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break;
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}
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} else if(ctx->operation == LWM2M_OP_READ) {
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switch(ctx->resource_id) {
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case LWM2M_SERVER_SHORT_SERVER_ID:
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lwm2m_object_write_int(ctx, server->server_id);
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break;
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case LWM2M_SERVER_LIFETIME_ID:
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lwm2m_object_write_int(ctx, server->lifetime);
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break;
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}
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} else if(ctx->operation == LWM2M_OP_EXECUTE) {
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switch(ctx->resource_id) {
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case LWM2M_SERVER_REG_UPDATE_TRIGGER_ID:
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lwm2m_rd_client_update_triggered(ctx->request->src_ep);
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break;
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}
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} else {
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return LWM2M_STATUS_NOT_IMPLEMENTED;
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}
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return LWM2M_STATUS_OK;
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}
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/*---------------------------------------------------------------------------*/
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lwm2m_server_t *
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lwm2m_server_add(uint16_t instance_id, uint16_t server_id, uint32_t lifetime)
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{
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lwm2m_server_t *server;
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int i;
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for(server = list_head(server_list);
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server;
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server = (lwm2m_server_t *)server->instance.next) {
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if(server->server_id == server_id) {
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/* Found a matching server */
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if(server->instance.instance_id != instance_id) {
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/* Non-matching instance id */
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LOG_DBG("non-matching instance id for server %u\n", server_id);
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return NULL;
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}
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server->lifetime = lifetime;
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return server;
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} else if(server->instance.instance_id == instance_id) {
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/* Right instance but wrong server id */
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LOG_DBG("non-matching server id for instance %u\n", instance_id);
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return NULL;
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}
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}
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for(i = 0; i < MAX_COUNT; i++) {
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if(server_instances[i].instance.instance_id == LWM2M_OBJECT_INSTANCE_NONE) {
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server_instances[i].instance.callback = lwm2m_callback;
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server_instances[i].instance.object_id = LWM2M_OBJECT_SERVER_ID;
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server_instances[i].instance.instance_id = instance_id;
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server_instances[i].instance.resource_ids = resources;
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server_instances[i].instance.resource_count =
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sizeof(resources) / sizeof(lwm2m_resource_id_t);
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server_instances[i].server_id = server_id;
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server_instances[i].lifetime = lifetime;
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list_add(server_list, &server_instances[i].instance);
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return &server_instances[i];
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}
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}
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LOG_WARN("no space for more servers\n");
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return NULL;
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}
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/*---------------------------------------------------------------------------*/
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void
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lwm2m_server_init(void)
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{
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int i;
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LOG_INFO("init\n");
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list_init(server_list);
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for(i = 0; i < MAX_COUNT; i++) {
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server_instances[i].instance.instance_id = LWM2M_OBJECT_INSTANCE_NONE;
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}
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lwm2m_engine_add_generic_object(&server_object);
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}
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/*---------------------------------------------------------------------------*/
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/** @} */
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