www.pudn.com > TCPmodbushy.rar > udp.h

/* 
 * Copyright (c) 2001-2004 Swedish Institute of Computer Science. 
 * All rights reserved.  
 *  
 * Redistribution and use in source and binary forms, with or without modification,  
 * are permitted provided that the following conditions are met: 
 * 
 * 1. Redistributions of source code must retain the above copyright notice, 
 *    this list of conditions and the following disclaimer. 
 * 2. Redistributions in binary form must reproduce the above copyright notice, 
 *    this list of conditions and the following disclaimer in the documentation 
 *    and/or other materials provided with the distribution. 
 * 3. The name of the author may not be used to endorse or promote products 
 *    derived from this software without specific prior written permission.  
 * 
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED  
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF  
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT  
 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,  
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT  
 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS  
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN  
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING  
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY  
 * OF SUCH DAMAGE. 
 * 
 * This file is part of the lwIP TCP/IP stack. 
 *  
 * Author: Adam Dunkels  
 * 
 */ 
#ifndef __LWIP_UDP_H__ 
#define __LWIP_UDP_H__ 
 
#include "o:sysdef.h" 
#include "o:/lwip/arch.h" 
#include "o:/lwip/pbuf.h" 
#include "o:/IPV4/lwip/inet.h" 
#include "o:/IPV4/lwip/ip.h" 
#include "o:/IPV4/lwip/ip.h" 
#include "o:/lwip/debug.h" 
 
#define UDP_HLEN 8 
#define NEED_UDP_DISCONNECT 0 
#define UDP_LOCAL_PORT	502 
struct udp_hdr { 
  PACK_STRUCT_FIELD(u16_t src); 
  PACK_STRUCT_FIELD(u16_t dest);  /* src/dest UDP ports */ 
  PACK_STRUCT_FIELD(u16_t len); 
  PACK_STRUCT_FIELD(u16_t chksum); 
} PACK_STRUCT_STRUCT; 
 
#define UDP_FLAGS_NOCHKSUM 0x01U 
#define UDP_FLAGS_UDPLITE  0x02U 
#define UDP_FLAGS_CONNECTED  0x04U 
 
struct udp_pcb { 
/* Common members of all PCB types */ 
  IP_PCB; 
 
/* Protocol specific PCB members */ 
 
  struct udp_pcb xdata *next; 
 
  u8_t flags; 
  u16_t local_port, remote_port; 
   
//  u16_t chksum_len; 
  u8_t Owner;		// 0:no owner, 1:pu tong de chuli 2:DHCP 
//  void (* recv)(void xdata *arg, struct udp_pcb xdata *pcb, struct pbuf xdata *p, 
//    struct ip_addr xdata *addr, u16_t port); 
//  void xdata *recv_arg;   
}; 
 
struct sender_address{ 
  u16_t	Self_PORT; 
  u32_t	sender_IP; 
  u16_t	sender_PORT; 
}; 
 
extern struct sender_address UDP_Sender_Address; 
 
/* The following functions is the application layer interface to the 
   UDP code. */ 
u16_t NewPortForP2P( void ); 
void Init_UDP_Conncet( void ); 
err_t UDP_SendData( struct MEMB xdata *pMemb, u16_t self_port, u32_t u32_dst_ip, u16_t dst_port ); 
struct udp_pcb xdata * udp_new        (void); 
void             udp_remove     (struct udp_pcb xdata *pcb); 
err_t            udp_bind       (struct udp_pcb xdata *pcb, struct ip_addr xdata *ipaddr, 
                 u16_t port); 
err_t            udp_connect    (struct udp_pcb xdata *pcb, struct ip_addr xdata *ipaddr, 
                 u16_t port); 
#if NEED_UDP_DISCONNECT 
void             udp_disconnect    (struct udp_pcb xdata *pcb); 
#endif 
void             udp_recv       (struct udp_pcb xdata *pcb, u8_t Owner); 
err_t            udp_sendto     (struct udp_pcb xdata *pcb, struct pbuf xdata*p, struct ip_addr xdata *dst_ip, u16_t dst_port); 
err_t            udp_send       (struct udp_pcb xdata *pcb, struct pbuf xdata *p); 
 
#define          udp_flags(pcb)  ((pcb)->flags) 
#define          udp_setflags(pcb, f)  ((pcb)->flags = (f)) 
 
/* The following functions are the lower layer interface to UDP. */ 
void             udp_input      (struct pbuf xdata *p); 
void             udp_init       (void); 
 
#if UDP_DEBUG 
void udp_debug_print(struct udp_hdr *udphdr); 
#else 
#define udp_debug_print(udphdr) 
#endif 
#endif /* __LWIP_UDP_H__ */