Espressif Systems ESP8266EX

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3. Sample Codes

󰲧󰲧󰲧󰲧#define󰲧SERVER_PORT󰲧1002

󰲧󰲧󰲧󰲧int32󰲧listenfd;

󰲧󰲧󰲧󰲧int32󰲧ret;

󰲧󰲧󰲧󰲧struct󰲧sockaddr_in󰲧server_addr,remote_addr;

󰲧󰲧󰲧󰲧int󰲧stack_counter=0;

󰲧󰲧󰲧󰲧/*󰲧Construct󰲧local󰲧address󰲧structure󰲧*/

󰲧󰲧󰲧󰲧memset(&server_addr,󰲧0,󰲧sizeof(server_addr));󰲧/*󰲧Zero󰲧out󰲧structure󰲧*/

󰲧󰲧󰲧󰲧server_addr.sin_family󰲧=󰲧AF_INET;󰲧󰲧󰲧󰲧󰲧󰲧󰲧󰲧󰲧󰲧󰲧󰲧/*󰲧Internet󰲧address󰲧family󰲧*/

󰲧󰲧󰲧󰲧server_addr.sin_addr.s_addr󰲧=󰲧INADDR_ANY;󰲧󰲧󰲧/*󰲧Any󰲧incoming󰲧interface󰲧*/

󰲧󰲧󰲧󰲧server_addr.sin_len󰲧=󰲧sizeof(server_addr);󰲧󰲧

󰲧󰲧󰲧󰲧server_addr.sin_port󰲧=󰲧htons(httpd_server_port);󰲧/*󰲧Local󰲧port󰲧*/

󰲧󰲧󰲧󰲧/*󰲧Create󰲧socket󰲧for󰲧incoming󰲧connections󰲧*/

󰲧󰲧󰲧󰲧do{

󰲧󰲧󰲧󰲧󰲧󰲧󰲧󰲧listenfd󰲧=󰲧socket(AF_INET,󰲧SOCK_STREAM,󰲧0);

󰲧󰲧󰲧󰲧󰲧󰲧󰲧󰲧if󰲧(listenfd󰲧==󰲧-1)󰲧{

󰲧󰲧󰲧󰲧󰲧󰲧󰲧󰲧󰲧󰲧󰲧󰲧printf("ESP8266󰲧TCP󰲧server󰲧task󰲧>󰲧socket󰲧error\n”);

󰲧󰲧󰲧󰲧󰲧󰲧󰲧󰲧󰲧󰲧󰲧󰲧vTaskDelay(1000/portTICK_RATE_MS);

󰲧󰲧󰲧󰲧󰲧󰲧󰲧󰲧}

󰲧󰲧󰲧󰲧}while(listenfd󰲧==󰲧-1);

󰲧󰲧󰲧󰲧printf("ESP8266󰲧TCP󰲧server󰲧task󰲧>󰲧create󰲧socket:󰲧%d\n",󰲧server_sock);

󰲧󰲧󰲧󰲧/*󰲧Bind󰲧to󰲧the󰲧local󰲧port󰲧*/

󰲧󰲧󰲧󰲧do{

󰲧󰲧󰲧󰲧󰲧󰲧󰲧󰲧ret󰲧=󰲧bind(listenfd,󰲧(struct󰲧sockaddr󰲧*)&server_addr,󰲧sizeof(server_addr));

󰲧󰲧󰲧󰲧󰲧󰲧󰲧󰲧if󰲧(ret󰲧!=󰲧0)󰲧{

󰲧󰲧󰲧󰲧󰲧󰲧󰲧󰲧󰲧󰲧󰲧󰲧printf("ESP8266󰲧TCP󰲧server󰲧task󰲧>󰲧bind󰲧fail\n”);

󰲧󰲧󰲧󰲧󰲧󰲧󰲧󰲧󰲧󰲧󰲧󰲧vTaskDelay(1000/portTICK_RATE_MS);

󰲧󰲧󰲧󰲧󰲧󰲧󰲧󰲧}

󰲧󰲧󰲧󰲧}while(ret󰲧!=󰲧0);

󰲧󰲧󰲧󰲧printf("ESP8266󰲧TCP󰲧server󰲧task󰲧>󰲧port:%d\n”,ntohs(server_addr.sin_port));

Establish TCP server interception:

󰲧󰲧󰲧󰲧do{

󰲧󰲧󰲧󰲧󰲧󰲧󰲧󰲧/*󰲧Listen󰲧to󰲧the󰲧local󰲧connection󰲧*/

󰲧󰲧󰲧󰲧󰲧󰲧󰲧󰲧ret󰲧=󰲧listen(listenfd,󰲧MAX_CONN);

󰲧󰲧󰲧󰲧󰲧󰲧󰲧󰲧if󰲧(ret󰲧!=󰲧0)󰲧{

󰲧󰲧󰲧󰲧󰲧󰲧󰲧󰲧󰲧󰲧󰲧󰲧printf("ESP8266󰲧TCP󰲧server󰲧task󰲧>󰲧failed󰲧to󰲧set󰲧listen󰲧queue!\n");

󰲧󰲧󰲧󰲧󰲧󰲧󰲧󰲧󰲧󰲧󰲧󰲧vTaskDelay(1000/portTICK_RATE_MS);

Espressif

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2017.05

Espressif Systems ESP8266EX - Page 26