279 lines
7.3 KiB
C
279 lines
7.3 KiB
C
// Copyright 2015-2018 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <stdlib.h>
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#include <string.h>
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#include "rom/queue.h"
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#include "esp_log.h"
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#include "esp_transport.h"
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#include "esp_transport_utils.h"
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static const char *TAG = "TRANSPORT";
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/**
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* Transport layer structure, which will provide functions, basic properties for transport types
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*/
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struct esp_transport_item_t {
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int port;
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int socket; /*!< Socket to use in this transport */
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char *scheme; /*!< Tag name */
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void *context; /*!< Context data */
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void *data; /*!< Additional transport data */
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connect_func _connect; /*!< Connect function of this transport */
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io_read_func _read; /*!< Read */
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io_func _write; /*!< Write */
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trans_func _close; /*!< Close */
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poll_func _poll_read; /*!< Poll and read */
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poll_func _poll_write; /*!< Poll and write */
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trans_func _destroy; /*!< Destroy and free transport */
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connect_async_func _connect_async; /*!< non-blocking connect function of this transport */
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payload_transfer_func _parent_transfer; /*!< Function returning underlying transport layer */
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STAILQ_ENTRY(esp_transport_item_t) next;
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};
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/**
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* This list will hold all transport available
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*/
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STAILQ_HEAD(esp_transport_list_t, esp_transport_item_t);
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static esp_transport_handle_t esp_transport_get_default_parent(esp_transport_handle_t t)
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{
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/*
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* By default, the underlying transport layer handle is the handle itself
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*/
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return t;
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}
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esp_transport_list_handle_t esp_transport_list_init()
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{
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esp_transport_list_handle_t list = calloc(1, sizeof(struct esp_transport_list_t));
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ESP_TRANSPORT_MEM_CHECK(TAG, list, return NULL);
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STAILQ_INIT(list);
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return list;
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}
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esp_err_t esp_transport_list_add(esp_transport_list_handle_t list, esp_transport_handle_t t, const char *scheme)
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{
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if (list == NULL || t == NULL) {
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return ESP_ERR_INVALID_ARG;
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}
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t->scheme = calloc(1, strlen(scheme) + 1);
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ESP_TRANSPORT_MEM_CHECK(TAG, t->scheme, return ESP_ERR_NO_MEM);
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strcpy(t->scheme, scheme);
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STAILQ_INSERT_TAIL(list, t, next);
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return ESP_OK;
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}
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esp_transport_handle_t esp_transport_list_get_transport(esp_transport_list_handle_t list, const char *scheme)
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{
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if (!list) {
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return NULL;
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}
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if (scheme == NULL) {
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return STAILQ_FIRST(list);
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}
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esp_transport_handle_t item;
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STAILQ_FOREACH(item, list, next) {
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if (strcasecmp(item->scheme, scheme) == 0) {
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return item;
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}
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}
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return NULL;
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}
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esp_err_t esp_transport_list_destroy(esp_transport_list_handle_t list)
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{
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esp_transport_list_clean(list);
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free(list);
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return ESP_OK;
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}
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esp_err_t esp_transport_list_clean(esp_transport_list_handle_t list)
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{
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esp_transport_handle_t item = STAILQ_FIRST(list);
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esp_transport_handle_t tmp;
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while (item != NULL) {
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tmp = STAILQ_NEXT(item, next);
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if (item->_destroy) {
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item->_destroy(item);
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}
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esp_transport_destroy(item);
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item = tmp;
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}
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STAILQ_INIT(list);
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return ESP_OK;
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}
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esp_transport_handle_t esp_transport_init()
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{
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esp_transport_handle_t t = calloc(1, sizeof(struct esp_transport_item_t));
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ESP_TRANSPORT_MEM_CHECK(TAG, t, return NULL);
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return t;
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}
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esp_transport_handle_t esp_transport_get_payload_transport_handle(esp_transport_handle_t t)
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{
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if (t && t->_read) {
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return t->_parent_transfer(t);
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}
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return NULL;
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}
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esp_err_t esp_transport_destroy(esp_transport_handle_t t)
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{
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if (t->scheme) {
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free(t->scheme);
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}
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free(t);
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return ESP_OK;
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}
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int esp_transport_connect(esp_transport_handle_t t, const char *host, int port, int timeout_ms)
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{
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int ret = -1;
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if (t && t->_connect) {
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return t->_connect(t, host, port, timeout_ms);
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}
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return ret;
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}
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int esp_transport_connect_async(esp_transport_handle_t t, const char *host, int port, int timeout_ms)
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{
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int ret = -1;
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if (t && t->_connect) {
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return t->_connect_async(t, host, port, timeout_ms);
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}
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return ret;
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}
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int esp_transport_read(esp_transport_handle_t t, char *buffer, int len, int timeout_ms)
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{
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if (t && t->_read) {
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return t->_read(t, buffer, len, timeout_ms);
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}
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return -1;
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}
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int esp_transport_write(esp_transport_handle_t t, const char *buffer, int len, int timeout_ms)
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{
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if (t && t->_write) {
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return t->_write(t, buffer, len, timeout_ms);
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}
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return -1;
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}
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int esp_transport_poll_read(esp_transport_handle_t t, int timeout_ms)
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{
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if (t && t->_poll_read) {
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return t->_poll_read(t, timeout_ms);
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}
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return -1;
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}
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int esp_transport_poll_write(esp_transport_handle_t t, int timeout_ms)
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{
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if (t && t->_poll_write) {
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return t->_poll_write(t, timeout_ms);
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}
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return -1;
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}
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int esp_transport_close(esp_transport_handle_t t)
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{
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if (t && t->_close) {
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return t->_close(t);
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}
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return 0;
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}
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void *esp_transport_get_context_data(esp_transport_handle_t t)
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{
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if (t) {
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return t->data;
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}
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return NULL;
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}
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esp_err_t esp_transport_set_context_data(esp_transport_handle_t t, void *data)
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{
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if (t) {
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t->data = data;
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return ESP_OK;
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}
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return ESP_FAIL;
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}
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esp_err_t esp_transport_set_func(esp_transport_handle_t t,
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connect_func _connect,
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io_read_func _read,
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io_func _write,
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trans_func _close,
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poll_func _poll_read,
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poll_func _poll_write,
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trans_func _destroy)
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{
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if (t == NULL) {
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return ESP_FAIL;
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}
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t->_connect = _connect;
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t->_read = _read;
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t->_write = _write;
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t->_close = _close;
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t->_poll_read = _poll_read;
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t->_poll_write = _poll_write;
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t->_destroy = _destroy;
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t->_connect_async = NULL;
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t->_parent_transfer = esp_transport_get_default_parent;
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return ESP_OK;
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}
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int esp_transport_get_default_port(esp_transport_handle_t t)
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{
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if (t == NULL) {
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return -1;
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}
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return t->port;
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}
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esp_err_t esp_transport_set_default_port(esp_transport_handle_t t, int port)
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{
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if (t == NULL) {
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return ESP_FAIL;
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}
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t->port = port;
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return ESP_OK;
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}
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esp_err_t esp_transport_set_async_connect_func(esp_transport_handle_t t, connect_async_func _connect_async_func)
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{
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if (t == NULL) {
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return ESP_FAIL;
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}
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t->_connect_async = _connect_async_func;
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return ESP_OK;
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}
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esp_err_t esp_transport_set_parent_transport_func(esp_transport_handle_t t, payload_transfer_func _parent_transport)
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{
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if (t == NULL) {
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return ESP_FAIL;
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}
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t->_parent_transfer = _parent_transport;
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return ESP_OK;
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}
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