gd32450i-eval/app/test_app/test.c

#include <stdio.h>
#include <string.h>
#include <fcntl.h>
#include <linux/types.h>
//#include <linux/jiffies.h>
#include <unistd.h>
#include <stdint.h>
#include <string.h>
#include <errno.h>
#include <pthread.h>
#include <fcntl.h>
#include <sys/socket.h>
#include <netdb.h>        /* getaddrinfo(3) et al.                       */
#include <netinet/in.h>   /* sockaddr_in & sockaddr_in6 definition.      */
#include  <net/if.h>
#include <sys/prctl.h>
#include "driver.h"
#include "hal_interface_api.h"

int main()
{
	int fd;
	struct sockaddr_in servaddr;
	printf("test_app\n");

	fd = socket(AF_INET, SOCK_DGRAM, 0);
	if (fd == -1) {
		printf("---> create socket error!\n");
	}

	bzero(&servaddr, sizeof(servaddr));
	servaddr.sin_family = AF_INET;
	servaddr.sin_port = htons(623);					
	servaddr.sin_addr.s_addr = inet_addr("127.0.0.1");
	if (connect(fd, &servaddr, sizeof(servaddr)) == -1) {
		printf("---> connect error!\n");
		return -1;
	}

	printf("---> connect ok, port: %d\n", \
		servaddr.sin_port );
	uint8_t buf[] = {1,2,3,4,5,6,7,8,9};
	send(fd, buf, 9, 0);
}