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jialexd 2019-04-02 16:34:25 +08:00
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component/common/example/nonblock_connect/example_nonblock_connect.c Executable file
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#include "FreeRTOS.h"
#include "task.h"
#include <platform/platform_stdlib.h>
#include <lwip/sockets.h>
#define SERVER_IP "192.168.13.1"
#define SERVER_PORT 80
// Need to define ERRNO in lwipopts.h
int errno = 0;
static void example_nonblock_connect_thread(void *param)
{
int server_fd = -1;
struct sockaddr_in server_addr;
// Delay to wait for IP by DHCP
vTaskDelay(10000);
printf("\nExample: Non-blocking socket connect\n");
server_fd = socket(AF_INET, SOCK_STREAM, 0);
fcntl(server_fd, F_SETFL, fcntl(server_fd, F_GETFL, 0) | O_NONBLOCK);
server_addr.sin_family = AF_INET;
server_addr.sin_addr.s_addr = inet_addr(SERVER_IP);
server_addr.sin_port = htons(SERVER_PORT);
connect(server_fd, (struct sockaddr *) &server_addr, sizeof(server_addr));
if(errno == EINPROGRESS) {
fd_set wfds;
struct timeval time_out;
time_out.tv_sec = 3; // Set select timeout of 3 seconds
time_out.tv_usec = 0;
FD_ZERO(&wfds) ;
FD_SET(server_fd, &wfds); // Only set server fd
// Use select to wait for non-blocking connect
if(select(server_fd + 1, NULL, &wfds, NULL, &time_out) == 1)
printf("Server connection successful\n");
else
printf("Server connection failed\n");
}
else {
printf("ERROR: connect\n");
}
close(server_fd);
vTaskDelete(NULL);
}
void example_nonblock_connect(void)
{
if(xTaskCreate(example_nonblock_connect_thread, ((const char*)"example_nonblock_connect_thread"), 1024, NULL, tskIDLE_PRIORITY + 1, NULL) != pdPASS)
printf("\n\r%s xTaskCreate(init_thread) failed", __FUNCTION__);
}