update

USDK/component/common/example/socket_select/example_socket_select.c

@@ -0,0 +1,106 @@
+#include "FreeRTOS.h"
+#include "task.h"
+#include <platform/platform_stdlib.h>
+#include <lwip/sockets.h>
+
+#if LWIP_SOCKET
+
+#define MAX_SOCKETS     10
+#define SELECT_TIMEOUT  10
+#define SERVER_PORT     5000
+#define LISTEN_QLEN     2
+
+static void example_socket_select_thread(void *param)
+{
+	struct sockaddr_in server_addr;
+	int server_fd = -1;
+	int socket_used[10];
+
+	memset(socket_used, 0, sizeof(socket_used));
+
+	if((server_fd = socket(AF_INET, SOCK_STREAM, 0)) >= 0) {
+		socket_used[server_fd] = 1;
+	}
+	else {
+		printf("socket error\n");
+		goto exit;
+	}
+
+	server_addr.sin_family = AF_INET;
+	server_addr.sin_port = htons(SERVER_PORT);
+	server_addr.sin_addr.s_addr = INADDR_ANY;
+
+	if(bind(server_fd, (struct sockaddr *) &server_addr, sizeof(server_addr)) != 0) {
+		printf("bind error\n");
+		goto exit;
+	}
+
+	if(listen(server_fd, LISTEN_QLEN) != 0) {
+		printf("listen error\n");
+		goto exit;
+	}
+
+	while(1) {
+		int socket_fd;
+		unsigned char buf[512];
+		fd_set read_fds;
+		struct timeval timeout;
+
+		FD_ZERO(&read_fds);
+		timeout.tv_sec = SELECT_TIMEOUT;
+		timeout.tv_usec = 0;
+
+		for(socket_fd = 0; socket_fd < MAX_SOCKETS; socket_fd ++)
+			if(socket_used[socket_fd])
+				FD_SET(socket_fd, &read_fds);
+
+		if(select(MAX_SOCKETS, &read_fds, NULL, NULL, &timeout)) {
+			for(socket_fd = 0; socket_fd < MAX_SOCKETS; socket_fd ++) {
+				if(socket_used[socket_fd] && FD_ISSET(socket_fd, &read_fds)) {
+					if(socket_fd == server_fd) {
+						struct sockaddr_in client_addr;
+						unsigned int client_addr_size = sizeof(client_addr);
+						int fd = accept(server_fd, (struct sockaddr *) &client_addr, &client_addr_size);
+
+						if(fd >= 0) {
+							printf("accept socket fd(%d)\n", fd);
+							socket_used[fd] = 1;
+						}
+						else {
+							printf("accept error\n");
+						}
+					}
+					else {
+						int read_size = read(socket_fd, buf, sizeof(buf));
+
+						if(read_size > 0) {
+							write(socket_fd, buf, read_size);
+						}
+						else {
+							printf("socket fd(%d) disconnected\n", socket_fd);
+							socket_used[socket_fd] = 0;
+							close(socket_fd);
+						}
+					}
+				}
+			}
+		}
+		else {
+			printf("TCP server: no data in %d seconds\n", SELECT_TIMEOUT);
+		}
+	}
+
+exit:
+	if(server_fd >= 0)
+		close(server_fd);
+
+	vTaskDelete(NULL);
+}
+
+void example_socket_select(void)
+{
+	if(xTaskCreate(example_socket_select_thread, ((const char*)"example_socket_select_thread"), 1024, NULL, tskIDLE_PRIORITY + 1, NULL) != pdPASS)
+		printf("\n\r%s xTaskCreate(init_thread) failed", __FUNCTION__);
+}
+
+#endif // LWIP_SOCKET

USDK/component/common/example/socket_select/example_socket_select.h

@@ -0,0 +1,6 @@
+#ifndef EXAMPLE_SOCKET_SELECT_H
+#define EXAMPLE_SOCKET_SELECT_H
+
+void example_socket_select(void);
+
+#endif /* EXAMPLE_SOCKET_SELECT_H */

USDK/component/common/example/socket_select/readme.txt

@@ -0,0 +1,13 @@
+LWIP SOCKET SELECT EXAMPLE
+
+Description:
+TCP server listens on port 5000 and handle socket by select().
+
+Configuration:
+[platform_opts.h]
+    #define CONFIG_EXAMPLE_SOCKET_SELECT    1
+
+Execution:
+Can make automatical Wi-Fi connection when booting by using wlan fast connect example.
+A socket select example thread will be started automatically when booting.
+