zudp.h

uCOSII上实现的tcpip协议实现代码（gcc编译）

#ifndef _ZUDP_H
#define _ZUDP_H

#include "zarch.h"
#include "zdef.h"
#include "zbuffer.h"
#include "znetif.h"
#include "zipv4.h"
#include "zsocket.h"


#define UDP_HEAD_LEN	8
#define UDP_BUFFER_LEN	5	/*every socket's buffer chain number*/

#define UDP_FLAGS_WAIT	0x01		

#define UDP_STATE_WAIT	0x01

STRUCT_BEGIN
typedef struct _udp_header
{
	u16_t src_port;
	u16_t dest_port;
	u16_t len;
	u16_t chksum;
}udp_header_t;
STRUCT_END

typedef struct _udp_pcb
{	
	zsocket_t	*_psocket;		/*identify of UDP socket*/
	sys_sem_t	_sem;
	u8_t		_udp_state;
	zbuffer_t	*_data[UDP_BUFFER_LEN];		/*storeage udp's data only store five buffer chain*/
	u8_t		_rindex;
	u8_t		_windex;
	
}udp_pcb_t;


extern void udp_init(void);
extern u8_t udp_open(zsocket_t *psocket);
extern u8_t	udp_close(zsocket_t *psocket);
extern void udp_input(znetif_t *pnetif, zbuffer_t *pbuffer);
extern u8_t udp_recv(zsocket_t *psocket , ipaddr_t *remote_ip, u16_t *remote_port, zbuffer_t **pdata, u8_t flags);

extern u8_t udp_send(zsocket_t *psocket , ipaddr_t *remote_ip, u16_t *remote_port, void *pdata, u16_t *psize);


#endif