esp-idf/examples/09_openssl_client/main/openssl_client.c
2016-11-15 11:12:58 +08:00

236 lines
6.6 KiB
C

// Copyright 2015-2016 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 "openssl_client.h"
#include <string.h>
#include "openssl/ssl.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "freertos/event_groups.h"
#include "esp_types.h"
#include "esp_log.h"
#include "esp_system.h"
#include "esp_wifi.h"
#include "esp_event_loop.h"
#include "esp_log.h"
#include "nvs_flash.h"
#include "tcpip_adapter.h"
#include "lwip/sockets.h"
#include "lwip/netdb.h"
static EventGroupHandle_t wifi_event_group;
/* The event group allows multiple bits for each event,
but we only care about one event - are we connected
to the AP with an IP? */
const static int CONNECTED_BIT = BIT0;
const static char *TAG = "Openssl_demo";
void openssl_demo_thread(void *p)
{
int ret;
SSL_CTX *ctx;
SSL *ssl;
int socket;
struct sockaddr_in sock_addr;
struct hostent *hp;
struct ip4_addr *ip4_addr;
int recv_bytes = 0;
char send_data[] = OPENSSL_DEMO_REQUEST;
int send_bytes = sizeof(send_data);
char recv_buf[OPENSSL_DEMO_RECV_BUF_LEN];
ESP_LOGI(TAG, "OpenSSL demo thread start OK");
ESP_LOGI(TAG, "get target IP address");
hp = gethostbyname(OPENSSL_DEMO_TARGET_NAME);
if (!hp) {
ESP_LOGI(TAG, "failed");
goto failed1;
}
ESP_LOGI(TAG, "OK");
ip4_addr = (struct ip4_addr *)hp->h_addr;
ESP_LOGI(TAG, IPSTR, IP2STR(ip4_addr));
ESP_LOGI(TAG, "create SSL context ......");
ctx = SSL_CTX_new(TLSv1_1_client_method());
if (!ctx) {
ESP_LOGI(TAG, "failed");
goto failed1;
}
ESP_LOGI(TAG, "OK");
ESP_LOGI(TAG, "create socket ......");
socket = socket(AF_INET, SOCK_STREAM, 0);
if (socket < 0) {
ESP_LOGI(TAG, "failed");
goto failed2;
}
ESP_LOGI(TAG, "OK");
ESP_LOGI(TAG, "bind socket ......");
memset(&sock_addr, 0, sizeof(sock_addr));
sock_addr.sin_family = AF_INET;
sock_addr.sin_addr.s_addr = 0;
sock_addr.sin_port = htons(OPENSSL_DEMO_LOCAL_TCP_PORT);
ret = bind(socket, (struct sockaddr*)&sock_addr, sizeof(sock_addr));
if (ret) {
ESP_LOGI(TAG, "failed");
goto failed3;
}
ESP_LOGI(TAG, "OK");
ESP_LOGI(TAG, "socket connect to remote %s ......", OPENSSL_DEMO_TARGET_NAME);
memset(&sock_addr, 0, sizeof(sock_addr));
sock_addr.sin_family = AF_INET;
sock_addr.sin_addr.s_addr = ip4_addr->addr;
sock_addr.sin_port = htons(OPENSSL_DEMO_TARGET_TCP_PORT);
ret = connect(socket, (struct sockaddr*)&sock_addr, sizeof(sock_addr));
if (ret) {
ESP_LOGI(TAG, "failed");
goto failed3;
}
ESP_LOGI(TAG, "OK");
ESP_LOGI(TAG, "create SSL ......");
ssl = SSL_new(ctx);
if (!ssl) {
ESP_LOGI(TAG, "failed");
goto failed3;
}
ESP_LOGI(TAG, "OK");
SSL_set_fd(ssl, socket);
ESP_LOGI(TAG, "SSL connected to %s port %d ......",
OPENSSL_DEMO_TARGET_NAME, OPENSSL_DEMO_TARGET_TCP_PORT);
ret = SSL_connect(ssl);
if (!ret) {
ESP_LOGI(TAG, "failed " );
goto failed4;
}
ESP_LOGI(TAG, "OK");
ESP_LOGI(TAG, "send https request to %s port %d ......",
OPENSSL_DEMO_TARGET_NAME, OPENSSL_DEMO_TARGET_TCP_PORT);
ret = SSL_write(ssl, send_data, send_bytes);
if (ret <= 0) {
ESP_LOGI(TAG, "failed");
goto failed5;
}
ESP_LOGI(TAG, "OK");
do {
ret = SSL_read(ssl, recv_buf, OPENSSL_DEMO_RECV_BUF_LEN - 1);
if (ret <= 0) {
break;
}
recv_bytes += ret;
ESP_LOGI(TAG, "%s", recv_buf);
} while (1);
ESP_LOGI(TAG, "totaly read %d bytes data from %s ......", recv_bytes, OPENSSL_DEMO_TARGET_NAME);
failed5:
SSL_shutdown(ssl);
failed4:
SSL_free(ssl);
ssl = NULL;
failed3:
close(socket);
socket = -1;
failed2:
SSL_CTX_free(ctx);
ctx = NULL;
failed1:
vTaskDelete(NULL);
return ;
}
static void openssl_client_init(void)
{
int ret;
xTaskHandle openssl_handle;
extern void openssl_demo_thread(void *p);
ret = xTaskCreate(openssl_demo_thread,
OPENSSL_DEMO_THREAD_NAME,
OPENSSL_DEMO_THREAD_STACK_WORDS,
NULL,
OPENSSL_DEMO_THREAD_PRORIOTY,
&openssl_handle);
if (ret != pdPASS) {
ESP_LOGI(TAG, "create thread %s failed", OPENSSL_DEMO_THREAD_NAME);
return ;
}
}
static esp_err_t wifi_event_handler(void *ctx, system_event_t *event)
{
switch(event->event_id) {
case SYSTEM_EVENT_STA_START:
esp_wifi_connect();
break;
case SYSTEM_EVENT_STA_GOT_IP:
xEventGroupSetBits(wifi_event_group, CONNECTED_BIT);
openssl_client_init();
break;
case SYSTEM_EVENT_STA_DISCONNECTED:
/* This is a workaround as ESP32 WiFi libs don't currently
auto-reassociate. */
esp_wifi_connect();
xEventGroupClearBits(wifi_event_group, CONNECTED_BIT);
break;
default:
break;
}
return ESP_OK;
}
static void wifi_conn_init(void)
{
tcpip_adapter_init();
wifi_event_group = xEventGroupCreate();
ESP_ERROR_CHECK( esp_event_loop_init(wifi_event_handler, NULL) );
wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
ESP_ERROR_CHECK( esp_wifi_init(&cfg) );
ESP_ERROR_CHECK( esp_wifi_set_storage(WIFI_STORAGE_RAM) );
wifi_config_t wifi_config = {
.sta = {
.ssid = EXAMPLE_WIFI_SSID,
.password = EXAMPLE_WIFI_PASS,
},
};
ESP_ERROR_CHECK( esp_wifi_set_mode(WIFI_MODE_STA) );
ESP_ERROR_CHECK( esp_wifi_set_config(WIFI_IF_STA, &wifi_config) );
ESP_LOGI(TAG, "start the WIFI SSID:[%s] password:[%s]\n", EXAMPLE_WIFI_SSID, EXAMPLE_WIFI_PASS);
ESP_ERROR_CHECK( esp_wifi_start() );
}
void app_main(void)
{
nvs_flash_init();
wifi_conn_init();
}