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/*
* SPDX-FileCopyrightText: 2019-2022 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <stdio.h>
#include <string.h>
#include <inttypes.h>
#include <esp_err.h>
#include <esp_log.h>
#include <protocomm.h>
#include <protocomm_security0.h>
#include <protocomm_security1.h>
#include <protocomm_security2.h>
#include <esp_local_ctrl.h>
#include "esp_local_ctrl_priv.h"
#include "esp_local_ctrl.pb-c.h"
#define ESP_LOCAL_CTRL_VERSION "v1.0"
struct inst_ctx {
protocomm_t *pc;
esp_local_ctrl_config_t config;
esp_local_ctrl_prop_t **props;
size_t props_count;
};
struct inst_ctx *local_ctrl_inst_ctx;
static const char *TAG = "esp_local_ctrl";
esp_err_t esp_local_ctrl_start(const esp_local_ctrl_config_t *config)
{
esp_err_t ret;
if (!config) {
ESP_LOGE(TAG, "NULL configuration provided");
return ESP_ERR_INVALID_ARG;
}
if (!config->transport) {
ESP_LOGE(TAG, "No transport provided");
return ESP_ERR_INVALID_ARG;
}
if (config->max_properties == 0) {
ESP_LOGE(TAG, "max_properties must be greater than 0");
return ESP_ERR_INVALID_ARG;
}
if (!config->handlers.get_prop_values ||
!config->handlers.set_prop_values) {
ESP_LOGE(TAG, "Handlers cannot be null");
return ESP_ERR_INVALID_ARG;
}
if (local_ctrl_inst_ctx) {
ESP_LOGW(TAG, "Service already active");
return ESP_ERR_INVALID_STATE;
}
local_ctrl_inst_ctx = calloc(1, sizeof(struct inst_ctx));
if (!local_ctrl_inst_ctx) {
ESP_LOGE(TAG, "Failed to allocate memory for instance");
return ESP_ERR_NO_MEM;
}
memcpy(&local_ctrl_inst_ctx->config, config, sizeof(local_ctrl_inst_ctx->config));
local_ctrl_inst_ctx->props = calloc(local_ctrl_inst_ctx->config.max_properties,
sizeof(esp_local_ctrl_prop_t *));
if (!local_ctrl_inst_ctx->props) {
ESP_LOGE(TAG, "Failed to allocate memory for properties");
free(local_ctrl_inst_ctx);
local_ctrl_inst_ctx = NULL;
return ESP_ERR_NO_MEM;
}
/* Since the config structure will be different for different transport modes, each transport may
* implement a `copy_config()` function, which accepts a configuration structure as input and
* creates a copy of that, which can be kept in the context structure of the `esp_local_ctrl` instance.
* This copy can be later be freed using `free_config()` */
if (config->transport->copy_config) {
ret = config->transport->copy_config(&local_ctrl_inst_ctx->config.transport_config,
&config->transport_config);
if (ret != ESP_OK) {
esp_local_ctrl_stop();
return ret;
}
}
/* For a selected transport mode, endpoints may need to be declared prior to starting the
* `esp_local_ctrl` service, e.g. in case of BLE. By declaration it means that the transport layer
* allocates some resources for an endpoint, and later, after service has started, a handler
* is assigned for that endpoint */
if (config->transport->declare_ep) {
/* UUIDs are 16bit unique IDs for each endpoint. This may or may not be relevant for
* a chosen transport. We reserve all values from FF50 to FFFF for the internal endpoints.
* The remaining endpoints can be used by the application for its own custom endpoints */
uint16_t start_uuid = 0xFF50;
ret = config->transport->declare_ep(&local_ctrl_inst_ctx->config.transport_config,
"esp_local_ctrl/version", start_uuid++);
if (ret != ESP_OK) {
esp_local_ctrl_stop();
return ret;
}
ret = config->transport->declare_ep(&local_ctrl_inst_ctx->config.transport_config,
"esp_local_ctrl/session", start_uuid++);
if (ret != ESP_OK) {
esp_local_ctrl_stop();
return ret;
}
ret = config->transport->declare_ep(&local_ctrl_inst_ctx->config.transport_config,
"esp_local_ctrl/control", start_uuid++);
if (ret != ESP_OK) {
esp_local_ctrl_stop();
return ret;
}
}
local_ctrl_inst_ctx->pc = protocomm_new();
if (!local_ctrl_inst_ctx->pc) {
ESP_LOGE(TAG, "Failed to create new protocomm instance");
esp_local_ctrl_stop();
return ESP_FAIL;
}
if (config->transport->start_service) {
ret = config->transport->start_service(local_ctrl_inst_ctx->pc,
&local_ctrl_inst_ctx->config.transport_config);
if (ret != ESP_OK) {
esp_local_ctrl_stop();
return ret;
}
}
ret = protocomm_set_version(local_ctrl_inst_ctx->pc, "esp_local_ctrl/version",
ESP_LOCAL_CTRL_VERSION);
if (ret != ESP_OK) {
ESP_LOGE(TAG, "Failed to set version endpoint");
esp_local_ctrl_stop();
return ret;
}
protocomm_security_t *proto_sec_handle = NULL;
switch (local_ctrl_inst_ctx->config.proto_sec.version) {
case PROTOCOM_SEC_CUSTOM:
proto_sec_handle = local_ctrl_inst_ctx->config.proto_sec.custom_handle;
break;
case PROTOCOM_SEC1:
#ifdef CONFIG_ESP_PROTOCOMM_SUPPORT_SECURITY_VERSION_1
proto_sec_handle = (protocomm_security_t *) &protocomm_security1;
#else
// Enable SECURITY_VERSION_1 in Protocomm configuration menu
return ESP_ERR_NOT_SUPPORTED;
#endif
break;
case PROTOCOM_SEC2:
#ifdef CONFIG_ESP_PROTOCOMM_SUPPORT_SECURITY_VERSION_2
proto_sec_handle = (protocomm_security_t *) &protocomm_security2;
break;
#else
// Enable SECURITY_VERSION_2 in Protocomm configuration menu
return ESP_ERR_NOT_SUPPORTED;
#endif
case PROTOCOM_SEC0:
default:
#ifdef CONFIG_ESP_PROTOCOMM_SUPPORT_SECURITY_VERSION_0
proto_sec_handle = (protocomm_security_t *) &protocomm_security0;
#else
// Enable SECURITY_VERSION_0 in Protocomm configuration menu
return ESP_ERR_NOT_SUPPORTED;
#endif
break;
}
ret = protocomm_set_security(local_ctrl_inst_ctx->pc, "esp_local_ctrl/session",
proto_sec_handle, local_ctrl_inst_ctx->config.proto_sec.sec_params);
if (ret != ESP_OK) {
ESP_LOGE(TAG, "Failed to set session endpoint");
esp_local_ctrl_stop();
return ret;
}
ret = protocomm_add_endpoint(local_ctrl_inst_ctx->pc, "esp_local_ctrl/control",
esp_local_ctrl_data_handler, NULL);
if (ret != ESP_OK) {
ESP_LOGE(TAG, "Failed to set control endpoint");
esp_local_ctrl_stop();
return ret;
}
return ESP_OK;
}
esp_err_t esp_local_ctrl_stop(void)
{
if (local_ctrl_inst_ctx) {
if (local_ctrl_inst_ctx->config.transport->free_config) {
local_ctrl_inst_ctx->config.transport->free_config(&local_ctrl_inst_ctx->config.transport_config);
}
if (local_ctrl_inst_ctx->pc) {
if (local_ctrl_inst_ctx->config.transport->stop_service) {
local_ctrl_inst_ctx->config.transport->stop_service(local_ctrl_inst_ctx->pc);
}
protocomm_delete(local_ctrl_inst_ctx->pc);
}
if (local_ctrl_inst_ctx->config.handlers.usr_ctx_free_fn) {
local_ctrl_inst_ctx->config.handlers.usr_ctx_free_fn(
local_ctrl_inst_ctx->config.handlers.usr_ctx);
}
/* Iterate through all properties one by one and free them */
for (uint32_t i = 0; i < local_ctrl_inst_ctx->config.max_properties; i++) {
if (local_ctrl_inst_ctx->props[i] == NULL) {
continue;
}
/* Release memory allocated for property data */
free(local_ctrl_inst_ctx->props[i]->name);
if (local_ctrl_inst_ctx->props[i]->ctx_free_fn) {
local_ctrl_inst_ctx->props[i]->ctx_free_fn(local_ctrl_inst_ctx->props[i]->ctx);
}
free(local_ctrl_inst_ctx->props[i]);
}
free(local_ctrl_inst_ctx->props);
free(local_ctrl_inst_ctx);
local_ctrl_inst_ctx = NULL;
}
return ESP_OK;
}
static int esp_local_ctrl_get_property_index(const char *name)
{
if (!local_ctrl_inst_ctx || !name) {
return -1;
}
/* Iterate through all properties one by one
* and find the one with matching name */
for (uint32_t i = 0; i < local_ctrl_inst_ctx->props_count; i++) {
if (strcmp(local_ctrl_inst_ctx->props[i]->name, name) == 0) {
return i;
}
}
return -1;
}
esp_err_t esp_local_ctrl_add_property(const esp_local_ctrl_prop_t *prop)
{
if (!local_ctrl_inst_ctx) {
ESP_LOGE(TAG, "Service not running");
return ESP_ERR_INVALID_STATE;
}
if (!prop || !prop->name) {
return ESP_ERR_INVALID_ARG;
}
if (esp_local_ctrl_get_property_index(prop->name) >= 0) {
ESP_LOGE(TAG, "Property with name %s exists", prop->name);
return ESP_ERR_INVALID_STATE;
}
if (local_ctrl_inst_ctx->config.max_properties
== local_ctrl_inst_ctx->props_count) {
ESP_LOGE(TAG, "Max properties limit reached. Cannot add property %s", prop->name);
return ESP_ERR_NO_MEM;
}
uint32_t i = local_ctrl_inst_ctx->props_count;
local_ctrl_inst_ctx->props[i] = calloc(1, sizeof(esp_local_ctrl_prop_t));
if (!local_ctrl_inst_ctx->props[i]) {
ESP_LOGE(TAG, "Failed to allocate memory for new property %s", prop->name);
return ESP_ERR_NO_MEM;
}
local_ctrl_inst_ctx->props[i]->name = strdup(prop->name);
if (!local_ctrl_inst_ctx->props[i]->name) {
ESP_LOGE(TAG, "Failed to allocate memory for property data %s", prop->name);
free(local_ctrl_inst_ctx->props[i]);
local_ctrl_inst_ctx->props[i] = NULL;
return ESP_ERR_NO_MEM;
}
local_ctrl_inst_ctx->props[i]->type = prop->type;
local_ctrl_inst_ctx->props[i]->size = prop->size;
local_ctrl_inst_ctx->props[i]->flags = prop->flags;
local_ctrl_inst_ctx->props[i]->ctx = prop->ctx;
local_ctrl_inst_ctx->props[i]->ctx_free_fn = prop->ctx_free_fn;
local_ctrl_inst_ctx->props_count++;
return ESP_OK;
}
esp_err_t esp_local_ctrl_remove_property(const char *name)
{
int idx = esp_local_ctrl_get_property_index(name);
if (idx < 0) {
ESP_LOGE(TAG, "Property %s not found", name);
return ESP_ERR_NOT_FOUND;
}
/* Release memory allocated for property data */
if (local_ctrl_inst_ctx->props[idx]->ctx_free_fn) {
local_ctrl_inst_ctx->props[idx]->ctx_free_fn(
local_ctrl_inst_ctx->props[idx]->ctx);
}
free(local_ctrl_inst_ctx->props[idx]->name);
free(local_ctrl_inst_ctx->props[idx]);
local_ctrl_inst_ctx->props[idx++] = NULL;
/* Move the following properties forward, so that there is
* no empty space between two properties */
for (uint32_t i = idx; i < local_ctrl_inst_ctx->props_count; i++) {
if (local_ctrl_inst_ctx->props[i] == NULL) {
break;
}
local_ctrl_inst_ctx->props[i-1] = local_ctrl_inst_ctx->props[i];
}
local_ctrl_inst_ctx->props_count--;
return ESP_OK;
}
const esp_local_ctrl_prop_t *esp_local_ctrl_get_property(const char *name)
{
int idx = esp_local_ctrl_get_property_index(name);
if (idx < 0) {
ESP_LOGE(TAG, "Property %s not found", name);
return NULL;
}
return local_ctrl_inst_ctx->props[idx];
}
esp_err_t esp_local_ctrl_get_prop_count(size_t *count)
{
if (!local_ctrl_inst_ctx) {
ESP_LOGE(TAG, "Service not running");
return ESP_ERR_INVALID_STATE;
}
if (!count) {
return ESP_ERR_INVALID_ARG;
}
*count = local_ctrl_inst_ctx->props_count;
return ESP_OK;
}
esp_err_t esp_local_ctrl_get_prop_values(size_t total_indices, uint32_t *indices,
esp_local_ctrl_prop_t *props,
esp_local_ctrl_prop_val_t *values)
{
if (!local_ctrl_inst_ctx) {
ESP_LOGE(TAG, "Service not running");
return ESP_ERR_INVALID_STATE;
}
if (!indices || !props || !values) {
return ESP_ERR_INVALID_ARG;
}
/* Convert indices to names */
for (size_t i = 0; i < total_indices; i++) {
if (indices[i] >= local_ctrl_inst_ctx->props_count) {
ESP_LOGE(TAG, "Invalid property index %" PRId32, indices[i]);
return ESP_ERR_INVALID_ARG;
}
props[i].name = local_ctrl_inst_ctx->props[indices[i]]->name;
props[i].type = local_ctrl_inst_ctx->props[indices[i]]->type;
props[i].flags = local_ctrl_inst_ctx->props[indices[i]]->flags;
props[i].size = local_ctrl_inst_ctx->props[indices[i]]->size;
props[i].ctx = local_ctrl_inst_ctx->props[indices[i]]->ctx;
}
esp_local_ctrl_handlers_t *h = &local_ctrl_inst_ctx->config.handlers;
esp_err_t ret = h->get_prop_values(total_indices, props, values, h->usr_ctx);
/* Properties with fixed sizes need to be checked */
for (size_t i = 0; i < total_indices; i++) {
if (local_ctrl_inst_ctx->props[indices[i]]->size != 0) {
values[i].size = local_ctrl_inst_ctx->props[indices[i]]->size;
}
}
return ret;
}
esp_err_t esp_local_ctrl_set_prop_values(size_t total_indices, uint32_t *indices,
const esp_local_ctrl_prop_val_t *values)
{
if (!local_ctrl_inst_ctx) {
ESP_LOGE(TAG, "Service not running");
return ESP_ERR_INVALID_STATE;
}
if (!indices || !values) {
return ESP_ERR_INVALID_ARG;
}
esp_local_ctrl_prop_t *props = calloc(total_indices,
sizeof(esp_local_ctrl_prop_t));
if (!props) {
ESP_LOGE(TAG, "Unable to allocate memory for properties array");
return ESP_ERR_NO_MEM;
}
for (size_t i = 0; i < total_indices; i++) {
if (indices[i] >= local_ctrl_inst_ctx->props_count) {
ESP_LOGE(TAG, "Invalid property index %" PRId32, indices[i]);
free(props);
return ESP_ERR_INVALID_ARG;
}
/* Properties with fixed sizes need to be checked */
if ((local_ctrl_inst_ctx->props[indices[i]]->size != values[i].size) &&
(local_ctrl_inst_ctx->props[indices[i]]->size != 0)) {
ESP_LOGE(TAG, "Invalid property size %d. Expected %d",
values[i].size, local_ctrl_inst_ctx->props[indices[i]]->size);
free(props);
return ESP_ERR_INVALID_ARG;
}
props[i].name = local_ctrl_inst_ctx->props[indices[i]]->name;
props[i].type = local_ctrl_inst_ctx->props[indices[i]]->type;
props[i].flags = local_ctrl_inst_ctx->props[indices[i]]->flags;
props[i].size = local_ctrl_inst_ctx->props[indices[i]]->size;
props[i].ctx = local_ctrl_inst_ctx->props[indices[i]]->ctx;
}
esp_local_ctrl_handlers_t *h = &local_ctrl_inst_ctx->config.handlers;
esp_err_t ret = h->set_prop_values(total_indices, props, values, h->usr_ctx);
free(props);
return ret;
}
esp_err_t esp_local_ctrl_set_handler(const char *ep_name,
protocomm_req_handler_t handler,
void *priv_data)
{
esp_err_t ret = ESP_ERR_INVALID_STATE;
if (local_ctrl_inst_ctx) {
ret = protocomm_add_endpoint(local_ctrl_inst_ctx->pc, ep_name,
handler, priv_data);
}
if (ret != ESP_OK) {
ESP_LOGE(TAG, "Failed to register endpoint handler");
}
return ret;
}
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