software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
CONDITIONS OF ANY KIND, either express or implied.
*/
-#include "coap_client.h"
#include <string.h>
+#include <sys/socket.h>
+#include <netdb.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "esp_event_loop.h"
#include "nvs_flash.h"
-#include <sys/socket.h>
-#include "coap_config.h"
-#include "resource.h"
#include "coap.h"
+/* The examples use simple WiFi configuration that you can set via
+ 'make menuconfig'.
+
+ If you'd rather not, just change the below entries to strings with
+ the config you want - ie #define EXAMPLE_WIFI_SSID "mywifissid"
+*/
+#define EXAMPLE_WIFI_SSID CONFIG_WIFI_SSID
+#define EXAMPLE_WIFI_PASS CONFIG_WIFI_PASSWORD
+
+#define COAP_DEFAULT_TIME_SEC 5
+#define COAP_DEFAULT_TIME_USEC 0
+
+/* The examples use uri "coap://californium.eclipse.org" that
+ you can set via 'make menuconfig'.
+
+ If you'd rather not, just change the below entries to strings with
+ the config you want - ie #define COAP_DEFAULT_DEMO_URI "coap://californium.eclipse.org"
+*/
+#define COAP_DEFAULT_DEMO_URI CONFIG_TARGET_DOMAIN_URI
static EventGroupHandle_t wifi_event_group;
to the AP with an IP? */
const static int CONNECTED_BIT = BIT0;
-const static char *TAG = "CoAP_demo";
+const static char *TAG = "CoAP_client";
static void message_handler(struct coap_context_t *ctx, const coap_endpoint_t *local_interface, const coap_address_t *remote,
coap_pdu_t *sent, coap_pdu_t *received,
const coap_tid_t id)
{
- unsigned char* data = NULL;
- size_t data_len;
- if (COAP_RESPONSE_CLASS(received->hdr->code) == 2) {
- if (coap_get_data(received, &data_len, &data)) {
- printf("Received: %s\n", data);
- }
- }
+ unsigned char* data = NULL;
+ size_t data_len;
+ if (COAP_RESPONSE_CLASS(received->hdr->code) == 2) {
+ if (coap_get_data(received, &data_len, &data)) {
+ printf("Received: %s\n", data);
+ }
+ }
}
static void coap_demo_thread(void *p)
{
- coap_context_t* ctx = NULL;
- coap_address_t dst_addr, src_addr;
- static coap_uri_t uri;
- fd_set readfds;
- struct timeval tv;
- int flags, result;
- coap_pdu_t* request = NULL;
- const char* server_uri = COAP_DEFAULT_DEMO_URI;
- uint8_t get_method = 1;
-
- coap_address_init(&src_addr);
- src_addr.addr.sin.sin_family = AF_INET;
- src_addr.addr.sin.sin_port = htons(0);
- src_addr.addr.sin.sin_addr.s_addr = INADDR_ANY;
-
- ctx = coap_new_context(&src_addr);
- if (ctx) {
- coap_address_init(&dst_addr);
- dst_addr.addr.sin.sin_family = AF_INET;
- dst_addr.addr.sin.sin_port = htons(COAP_DEFAULT_PORT);
- dst_addr.addr.sin.sin_addr.s_addr = inet_addr(COAP_DEFAULT_DEMO_ADDR);
-
- coap_split_uri((const uint8_t *)server_uri, strlen(server_uri), &uri);
- request = coap_new_pdu();
- if (request){
- request->hdr->type = COAP_MESSAGE_CON;
- request->hdr->id = coap_new_message_id(ctx);
- request->hdr->code = get_method;
- coap_add_option(request, COAP_OPTION_URI_PATH, uri.path.length, uri.path.s);
-
- coap_register_response_handler(ctx, message_handler);
- coap_send_confirmed(ctx, ctx->endpoint, &dst_addr, request);
-
- flags = fcntl(ctx->sockfd, F_GETFL, 0);
- fcntl(ctx->sockfd, F_SETFL, flags|O_NONBLOCK);
-
- tv.tv_usec = COAP_DEFAULT_TIME_USEC;
- tv.tv_sec = COAP_DEFAULT_TIME_SEC;
-
- for(;;) {
- FD_ZERO(&readfds);
- FD_CLR( ctx->sockfd, &readfds );
- FD_SET( ctx->sockfd, &readfds );
- result = select( FD_SETSIZE, &readfds, 0, 0, &tv );
- if (result > 0) {
- if (FD_ISSET( ctx->sockfd, &readfds ))
- coap_read(ctx);
- } else if (result < 0) {
- break;
- } else {
- printf("select timeout\n");
- }
- }
- }
- coap_free_context(ctx);
- }
-
- vTaskDelete(NULL);
-}
-
-static void coap_server_init(void)
-{
- int ret = pdPASS;
- xTaskHandle coap_handle = NULL;
-
- ret = xTaskCreate(coap_demo_thread,
- COAP_DEMO_THREAD_NAME,
- COAP_DEMO_THREAD_STACK_WORDS,
- NULL,
- COAP_DEMO_THREAD_PRORIOTY,
- &coap_handle);
-
- if (ret != pdPASS) {
- ESP_LOGI(TAG, "create thread %s failed", COAP_DEMO_THREAD_NAME);
+ struct hostent *hp;
+ struct ip4_addr *ip4_addr;
+
+ coap_context_t* ctx = NULL;
+ coap_address_t dst_addr, src_addr;
+ static coap_uri_t uri;
+ fd_set readfds;
+ struct timeval tv;
+ int flags, result;
+ coap_pdu_t* request = NULL;
+ const char* server_uri = COAP_DEFAULT_DEMO_URI;
+ uint8_t get_method = 1;
+
+ while (1) {
+ /* Wait for the callback to set the CONNECTED_BIT in the
+ event group.
+ */
+ xEventGroupWaitBits(wifi_event_group, CONNECTED_BIT,
+ false, true, portMAX_DELAY);
+ ESP_LOGI(TAG, "Connected to AP");
+
+ if (coap_split_uri((const uint8_t *)server_uri, strlen(server_uri), &uri) == -1) {
+ ESP_LOGE(TAG, "CoAP server uri error");
+ break;
+ }
+
+ hp = gethostbyname((const char *)uri.host.s);
+
+ if (hp == NULL) {
+ ESP_LOGE(TAG, "DNS lookup failed");
+ vTaskDelay(1000 / portTICK_PERIOD_MS);
+ continue;
+ }
+
+ /* Code to print the resolved IP.
+
+ Note: inet_ntoa is non-reentrant, look at ipaddr_ntoa_r for "real" code */
+ ip4_addr = (struct ip4_addr *)hp->h_addr;
+ ESP_LOGI(TAG, "DNS lookup succeeded. IP=%s", inet_ntoa(*ip4_addr));
+
+ coap_address_init(&src_addr);
+ src_addr.addr.sin.sin_family = AF_INET;
+ src_addr.addr.sin.sin_port = htons(0);
+ src_addr.addr.sin.sin_addr.s_addr = INADDR_ANY;
+
+ ctx = coap_new_context(&src_addr);
+ if (ctx) {
+ coap_address_init(&dst_addr);
+ dst_addr.addr.sin.sin_family = AF_INET;
+ dst_addr.addr.sin.sin_port = htons(COAP_DEFAULT_PORT);
+ dst_addr.addr.sin.sin_addr.s_addr = ip4_addr->addr;
+
+ request = coap_new_pdu();
+ if (request){
+ request->hdr->type = COAP_MESSAGE_CON;
+ request->hdr->id = coap_new_message_id(ctx);
+ request->hdr->code = get_method;
+ coap_add_option(request, COAP_OPTION_URI_PATH, uri.path.length, uri.path.s);
+
+ coap_register_response_handler(ctx, message_handler);
+ coap_send_confirmed(ctx, ctx->endpoint, &dst_addr, request);
+
+ flags = fcntl(ctx->sockfd, F_GETFL, 0);
+ fcntl(ctx->sockfd, F_SETFL, flags|O_NONBLOCK);
+
+ tv.tv_usec = COAP_DEFAULT_TIME_USEC;
+ tv.tv_sec = COAP_DEFAULT_TIME_SEC;
+
+ for(;;) {
+ FD_ZERO(&readfds);
+ FD_CLR( ctx->sockfd, &readfds );
+ FD_SET( ctx->sockfd, &readfds );
+ result = select( FD_SETSIZE, &readfds, 0, 0, &tv );
+ if (result > 0) {
+ if (FD_ISSET( ctx->sockfd, &readfds ))
+ coap_read(ctx);
+ } else if (result < 0) {
+ break;
+ } else {
+ ESP_LOGE(TAG, "select timeout");
+ }
+ }
+ }
+ coap_free_context(ctx);
+ }
}
+
+ vTaskDelete(NULL);
}
static esp_err_t wifi_event_handler(void *ctx, system_event_t *event)
break;
case SYSTEM_EVENT_STA_GOT_IP:
xEventGroupSetBits(wifi_event_group, CONNECTED_BIT);
- coap_server_init();
break;
case SYSTEM_EVENT_STA_DISCONNECTED:
/* This is a workaround as ESP32 WiFi libs don't currently
};
ESP_ERROR_CHECK( esp_wifi_set_mode(WIFI_MODE_STA) );
ESP_ERROR_CHECK( esp_wifi_set_config(WIFI_IF_STA, &wifi_config) );
-
ESP_ERROR_CHECK( esp_wifi_start() );
}
{
nvs_flash_init();
wifi_conn_init();
+ xTaskCreate(coap_demo_thread, "coap", 2048, NULL, 5, NULL);
}
projects / esp-idf / commitdiff