85 lines
2.3 KiB
C
85 lines
2.3 KiB
C
#include <rtthread.h>
|
||
#include <lwip/sockets.h> /* 使用BSD socket，需要包含sockets.h头文件 */
|
||
|
||
void udpserv(void* paramemter)
|
||
{
|
||
int sock;
|
||
int bytes_read;
|
||
char *recv_data;
|
||
rt_uint32_t addr_len;
|
||
struct sockaddr_in server_addr, client_addr;
|
||
|
||
/* 分配接收用的数据缓冲 */
|
||
recv_data = rt_malloc(1024);
|
||
if (recv_data == RT_NULL)
|
||
{
|
||
/* 分配内存失败，返回 */
|
||
rt_kprintf("No memory\n");
|
||
return;
|
||
}
|
||
|
||
/* 创建一个socket，类型是SOCK_DGRAM，UDP类型 */
|
||
if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) == -1)
|
||
{
|
||
rt_kprintf("Socket error\n");
|
||
|
||
/* 释放接收用的数据缓冲 */
|
||
rt_free(recv_data);
|
||
return;
|
||
}
|
||
|
||
/* 初始化服务端地址 */
|
||
server_addr.sin_family = AF_INET;
|
||
server_addr.sin_port = htons(5000);
|
||
server_addr.sin_addr.s_addr = INADDR_ANY;
|
||
rt_memset(&(server_addr.sin_zero),0, sizeof(server_addr.sin_zero));
|
||
|
||
/* 绑定socket到服务端地址 */
|
||
if (bind(sock,(struct sockaddr *)&server_addr,
|
||
sizeof(struct sockaddr)) == -1)
|
||
{
|
||
/* 绑定地址失败 */
|
||
rt_kprintf("Bind error\n");
|
||
|
||
/* 释放接收用的数据缓冲 */
|
||
rt_free(recv_data);
|
||
return;
|
||
}
|
||
|
||
addr_len = sizeof(struct sockaddr);
|
||
rt_kprintf("UDPServer Waiting for client on port 5000...\n");
|
||
|
||
while (1)
|
||
{
|
||
/* 从sock中收取最大1024字节数据 */
|
||
bytes_read = recvfrom(sock, recv_data, 1024, 0,
|
||
(struct sockaddr *)&client_addr, &addr_len);
|
||
/* UDP不同于TCP，它基本不会出现收取的数据失败的情况，除非设置了超时等待 */
|
||
|
||
recv_data[bytes_read] = '\0'; /* 把末端清零 */
|
||
|
||
/* 输出接收的数据 */
|
||
rt_kprintf("\n(%s , %d) said : ",inet_ntoa(client_addr.sin_addr),
|
||
ntohs(client_addr.sin_port));
|
||
rt_kprintf("%s", recv_data);
|
||
|
||
/* 如果接收数据是exit，退出 */
|
||
if (strcmp(recv_data, "exit") == 0)
|
||
{
|
||
lwip_close(sock);
|
||
|
||
/* 释放接收用的数据缓冲 */
|
||
rt_free(recv_data);
|
||
break;
|
||
}
|
||
}
|
||
|
||
return;
|
||
}
|
||
|
||
#ifdef RT_USING_FINSH
|
||
#include <finsh.h>
|
||
/* 输出udpserv函数到finsh shell中 */
|
||
FINSH_FUNCTION_EXPORT(udpserv, startup udp server);
|
||
#endif
|