OVMS3-idf/components/tcp_transport/transport.c

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// Copyright 2015-2018 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include <stdlib.h>
#include <string.h>
#include "rom/queue.h"
#include "esp_log.h"
#include "transport.h"
#include "transport_utils.h"
static const char *TAG = "TRANSPORT";
/**
* Transport layer structure, which will provide functions, basic properties for transport types
*/
struct transport_item_t {
int port;
int socket; /*!< Socket to use in this transport */
char *scheme; /*!< Tag name */
void *context; /*!< Context data */
void *data; /*!< Additional transport data */
connect_func _connect; /*!< Connect function of this transport */
io_read_func _read; /*!< Read */
io_func _write; /*!< Write */
trans_func _close; /*!< Close */
poll_func _poll_read; /*!< Poll and read */
poll_func _poll_write; /*!< Poll and write */
trans_func _destroy; /*!< Destroy and free transport */
payload_transfer_func _parrent_transfer; /*!< Function returning underlying transport layer */
STAILQ_ENTRY(transport_item_t) next;
};
/**
* This list will hold all transport available
*/
STAILQ_HEAD(transport_list_t, transport_item_t);
transport_list_handle_t transport_list_init()
{
transport_list_handle_t list = calloc(1, sizeof(struct transport_list_t));
TRANSPORT_MEM_CHECK(TAG, list, return NULL);
STAILQ_INIT(list);
return list;
}
esp_err_t transport_list_add(transport_list_handle_t list, transport_handle_t t, const char *scheme)
{
if (list == NULL || t == NULL) {
return ESP_ERR_INVALID_ARG;
}
t->scheme = calloc(1, strlen(scheme) + 1);
TRANSPORT_MEM_CHECK(TAG, t->scheme, return ESP_ERR_NO_MEM);
strcpy(t->scheme, scheme);
STAILQ_INSERT_TAIL(list, t, next);
return ESP_OK;
}
transport_handle_t transport_list_get_transport(transport_list_handle_t list, const char *scheme)
{
if (!list) {
return NULL;
}
if (scheme == NULL) {
return STAILQ_FIRST(list);
}
transport_handle_t item;
STAILQ_FOREACH(item, list, next) {
if (strcasecmp(item->scheme, scheme) == 0) {
return item;
}
}
return NULL;
}
esp_err_t transport_list_destroy(transport_list_handle_t list)
{
transport_list_clean(list);
free(list);
return ESP_OK;
}
esp_err_t transport_list_clean(transport_list_handle_t list)
{
transport_handle_t item = STAILQ_FIRST(list);
transport_handle_t tmp;
while (item != NULL) {
tmp = STAILQ_NEXT(item, next);
if (item->_destroy) {
item->_destroy(item);
}
transport_destroy(item);
item = tmp;
}
STAILQ_INIT(list);
return ESP_OK;
}
transport_handle_t transport_init()
{
transport_handle_t t = calloc(1, sizeof(struct transport_item_t));
TRANSPORT_MEM_CHECK(TAG, t, return NULL);
return t;
}
transport_handle_t transport_get_payload_transport_handle(transport_handle_t t)
{
if (t && t->_read) {
return t->_parrent_transfer(t);
}
return NULL;
}
esp_err_t transport_destroy(transport_handle_t t)
{
if (t->scheme) {
free(t->scheme);
}
free(t);
return ESP_OK;
}
int transport_connect(transport_handle_t t, const char *host, int port, int timeout_ms)
{
int ret = -1;
if (t && t->_connect) {
return t->_connect(t, host, port, timeout_ms);
}
return ret;
}
int transport_read(transport_handle_t t, char *buffer, int len, int timeout_ms)
{
if (t && t->_read) {
return t->_read(t, buffer, len, timeout_ms);
}
return -1;
}
int transport_write(transport_handle_t t, const char *buffer, int len, int timeout_ms)
{
if (t && t->_write) {
return t->_write(t, buffer, len, timeout_ms);
}
return -1;
}
int transport_poll_read(transport_handle_t t, int timeout_ms)
{
if (t && t->_poll_read) {
return t->_poll_read(t, timeout_ms);
}
return -1;
}
int transport_poll_write(transport_handle_t t, int timeout_ms)
{
if (t && t->_poll_write) {
return t->_poll_write(t, timeout_ms);
}
return -1;
}
int transport_close(transport_handle_t t)
{
if (t && t->_close) {
return t->_close(t);
}
return 0;
}
void *transport_get_context_data(transport_handle_t t)
{
if (t) {
return t->data;
}
return NULL;
}
esp_err_t transport_set_context_data(transport_handle_t t, void *data)
{
if (t) {
t->data = data;
return ESP_OK;
}
return ESP_FAIL;
}
esp_err_t transport_set_func(transport_handle_t t,
connect_func _connect,
io_read_func _read,
io_func _write,
trans_func _close,
poll_func _poll_read,
poll_func _poll_write,
trans_func _destroy,
payload_transfer_func _parrent_transport)
{
if (t == NULL) {
return ESP_FAIL;
}
t->_connect = _connect;
t->_read = _read;
t->_write = _write;
t->_close = _close;
t->_poll_read = _poll_read;
t->_poll_write = _poll_write;
t->_destroy = _destroy;
t->_parrent_transfer = _parrent_transport;
return ESP_OK;
}
int transport_get_default_port(transport_handle_t t)
{
if (t == NULL) {
return -1;
}
return t->port;
}
esp_err_t transport_set_default_port(transport_handle_t t, int port)
{
if (t == NULL) {
return ESP_FAIL;
}
t->port = port;
return ESP_OK;
}
transport_handle_t transport_get_handle(transport_handle_t t)
{
return t;
}