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#include <rtthread.h>
#include <lwip/netdb.h> /* Ϊ�˽�������������Ҫ����netdb.hͷ�ļ� */
#include <lwip/sockets.h> /* ʹ��BSD socket����Ҫ����sockets.hͷ�ļ� */
void tcp_senddata(const char* url, int port, int length)
{
struct hostent *host;
int sock, err, result, timeout, index;
struct sockaddr_in server_addr;
rt_uint8_t *buffer_ptr;
/* ͨ��������ڲ���url���host��ַ��������������������������� */
host = gethostbyname(url);
/* ����һ��socket��������SOCKET_STREAM��TCP���� */
if ((sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) == -1)
{
/* ����socketʧ�� */
rt_kprintf("Socket error\n");
return;
}
/* �����ڴ� */
buffer_ptr = rt_malloc(length);
/* ���췢������ */
for (index = 0; index < length; index ++)
buffer_ptr[index] = index & 0xff;
timeout = 100;
/* ���÷��ͳ�ʱʱ��100ms */
lwip_setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO, &timeout, sizeof(timeout));
/* ��ʼ��Ԥ���ӵķ���˵�ַ */
server_addr.sin_family = AF_INET;
server_addr.sin_port = htons(port);
server_addr.sin_addr = *((struct in_addr *)host->h_addr);
rt_memset(&(server_addr.sin_zero), 0, sizeof(server_addr.sin_zero));
/* ���ӵ������ */
err = connect(sock, (struct sockaddr *)&server_addr, sizeof(struct sockaddr));
rt_kprintf("TCP thread connect error code: %d\n", err);
while(1)
{
/* �������ݵ�sock���� */
result = send(sock, buffer_ptr, length, MSG_DONTWAIT);
if(result == -1) //���ݷ��ʹ�����
{
rt_kprintf("TCP thread send error: %d\n", result);
lwip_close(sock); //�ر����ӣ����´�������
rt_thread_delay(10);
if ((sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) == -1)
rt_kprintf("TCP Socket error:%d\n",sock);
err = connect(sock, (struct sockaddr *)&server_addr, sizeof(struct sockaddr));
rt_kprintf("TCP thread connect error code: %d\n", err);
}
}
}
#ifdef RT_USING_FINSH
#include <finsh.h>
/* ���tcpclient������finsh shell�� */
FINSH_FUNCTION_EXPORT(tcp_senddata, send a packet through tcp connection);
#endif
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