156 lines
5 KiB
C
156 lines
5 KiB
C
// Copyright 2010-2017 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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//
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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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/*
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* After station connects to AP and gets IP address by smartconfig,
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* it will use UDP to send 'ACK' to cellphone.
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*/
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#include <string.h>
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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#include "lwip/sockets.h"
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#include "tcpip_adapter.h"
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#include "esp_log.h"
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#include "esp_wifi.h"
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#include "esp_smartconfig.h"
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#include "smartconfig_ack.h"
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static const char *TAG = "smartconfig";
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/* Flag to indicate sending smartconfig ACK or not. */
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static bool s_sc_ack_send = false;
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static int sc_ack_send_get_errno(int fd)
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{
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int sock_errno = 0;
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u32_t optlen = sizeof(sock_errno);
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getsockopt(fd, SOL_SOCKET, SO_ERROR, &sock_errno, &optlen);
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return sock_errno;
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}
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static void sc_ack_send_task(void *pvParameters)
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{
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sc_ack_t *ack = (sc_ack_t *)pvParameters;
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tcpip_adapter_ip_info_t local_ip;
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uint8_t *remote_ip = ack->ctx.ip;
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int remote_port = (ack->type == SC_ACK_TYPE_ESPTOUCH) ? SC_ACK_TOUCH_SERVER_PORT : SC_ACK_AIRKISS_SERVER_PORT;
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struct sockaddr_in server_addr;
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socklen_t sin_size = sizeof(server_addr);
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int send_sock = -1;
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int optval = 1;
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int sendlen;
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int ack_len = (ack->type == SC_ACK_TYPE_ESPTOUCH) ? SC_ACK_TOUCH_LEN : SC_ACK_AIRKISS_LEN;
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uint8_t packet_count = 1;
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int err;
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int ret;
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bzero(&server_addr, sizeof(struct sockaddr_in));
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server_addr.sin_family = AF_INET;
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server_addr.sin_addr.s_addr = inet_addr((const char*)remote_ip);
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server_addr.sin_port = htons(remote_port);
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esp_wifi_get_mac(WIFI_IF_STA, ack->ctx.mac);
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vTaskDelay(200 / portTICK_RATE_MS);
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while (s_sc_ack_send) {
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/* Get local IP address of station */
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ret = tcpip_adapter_get_ip_info(TCPIP_ADAPTER_IF_STA, &local_ip);
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if ((ESP_OK == ret) && (local_ip.ip.addr != INADDR_ANY)) {
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/* If ESP touch, smartconfig ACK contains local IP address. */
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if (ack->type == SC_ACK_TYPE_ESPTOUCH) {
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memcpy(ack->ctx.ip, &local_ip.ip.addr, 4);
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}
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/* Create UDP socket. */
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send_sock = socket(AF_INET, SOCK_DGRAM, 0);
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if ((send_sock < LWIP_SOCKET_OFFSET) || (send_sock > (FD_SETSIZE - 1))) {
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ESP_LOGE(TAG, "Creat udp socket failed");
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goto _end;
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}
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setsockopt(send_sock, SOL_SOCKET, SO_BROADCAST | SO_REUSEADDR, &optval, sizeof(int));
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while (s_sc_ack_send) {
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/* Send smartconfig ACK every 100ms. */
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vTaskDelay(100 / portTICK_RATE_MS);
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sendlen = sendto(send_sock, &ack->ctx, ack_len, 0, (struct sockaddr*) &server_addr, sin_size);
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if (sendlen > 0) {
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/* Totally send 30 smartconfig ACKs. Then smartconfig is successful. */
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if (packet_count++ >= SC_ACK_MAX_COUNT) {
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if (ack->link_flag) {
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*ack->link_flag = 1;
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}
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if (ack->cb) {
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ack->cb(SC_STATUS_LINK_OVER, remote_ip);
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}
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goto _end;
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}
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}
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else {
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err = sc_ack_send_get_errno(send_sock);
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if (err == ENOMEM || err == EAGAIN) {
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ESP_LOGD(TAG, "send failed, errno %d", err);
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continue;
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}
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ESP_LOGE(TAG, "send failed, errno %d", err);
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goto _end;
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}
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}
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}
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else {
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vTaskDelay((portTickType)(100 / portTICK_RATE_MS));
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}
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}
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_end:
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if ((send_sock >= LWIP_SOCKET_OFFSET) && (send_sock <= (FD_SETSIZE - 1))) {
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close(send_sock);
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}
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free(ack);
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vTaskDelete(NULL);
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}
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void sc_ack_send(sc_ack_t *param)
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{
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sc_ack_t *ack = NULL;
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if (param == NULL) {
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ESP_LOGE(TAG, "Smart config ack parameter error");
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return;
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}
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ack = malloc(sizeof(sc_ack_t));
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if (ack == NULL) {
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ESP_LOGE(TAG, "Smart config ack parameter malloc fail");
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return;
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}
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memcpy(ack, param, sizeof(sc_ack_t));
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s_sc_ack_send = true;
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if (xTaskCreate(sc_ack_send_task, "sc_ack_send_task", SC_ACK_TASK_STACK_SIZE, ack, SC_ACK_TASK_PRIORITY, NULL) != pdPASS) {
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ESP_LOGE(TAG, "Create sending smartconfig ACK task fail");
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free(ack);
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}
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}
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void sc_ack_send_stop(void)
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{
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s_sc_ack_send = false;
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}
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