etharp.h

LWIP1.1.1在UCOS-II2.61上的移植

#ifndef __NETIF_ETHARP_H__
#define __NETIF_ETHARP_H__

#ifndef ETH_PAD_SIZE
#define ETH_PAD_SIZE 0
#endif

#include "lwip/pbuf.h"
#include "lwip/ip_addr.h"
#include "lwip/netif.h"
#include "lwip/ip.h"


/** 5 seconds period */
#define ARP_TMR_INTERVAL 5000
#define ETHTYPE_ARP 0x0806
#define ETHTYPE_IP  0x0800




#ifdef PACK_STRUCT_USE_INCLUDES
#  include "arch/bpstruct.h"
#endif


PACK_STRUCT_BEGIN
struct eth_addr {
  PACK_STRUCT_FIELD(u8_t addr[6]);
} PACK_STRUCT_STRUCT;
PACK_STRUCT_END
#ifdef PACK_STRUCT_USE_INCLUDES
#  include "arch/epstruct.h"
#endif

#ifdef PACK_STRUCT_USE_INCLUDES
#  include "arch/bpstruct.h"
#endif


PACK_STRUCT_BEGIN
struct eth_hdr {
#if ETH_PAD_SIZE
  PACK_STRUCT_FIELD(u8_t padding[ETH_PAD_SIZE]);
#endif
  PACK_STRUCT_FIELD(struct eth_addr dest);
  PACK_STRUCT_FIELD(struct eth_addr src);
  PACK_STRUCT_FIELD(u16_t type);
} PACK_STRUCT_STRUCT;
PACK_STRUCT_END


#ifdef PACK_STRUCT_USE_INCLUDES
#  include "arch/epstruct.h"
#endif

#ifdef PACK_STRUCT_USE_INCLUDES
#  include "arch/bpstruct.h"
#endif


PACK_STRUCT_BEGIN
struct etharp_hdr {
  PACK_STRUCT_FIELD(struct eth_hdr ethhdr);
  PACK_STRUCT_FIELD(u16_t hwtype);
  PACK_STRUCT_FIELD(u16_t proto);
  PACK_STRUCT_FIELD(u16_t _hwlen_protolen); /*硬件地址长度：6AND协议地址长度：4*/
  PACK_STRUCT_FIELD(u16_t opcode);
  PACK_STRUCT_FIELD(struct eth_addr shwaddr);
  PACK_STRUCT_FIELD(struct ip_addr2 sipaddr);
  PACK_STRUCT_FIELD(struct eth_addr dhwaddr);
  PACK_STRUCT_FIELD(struct ip_addr2 dipaddr);
} PACK_STRUCT_STRUCT;
PACK_STRUCT_END


#ifdef PACK_STRUCT_USE_INCLUDES
#  include "arch/epstruct.h"
#endif

#ifdef PACK_STRUCT_USE_INCLUDES
#  include "arch/bpstruct.h"
#endif

PACK_STRUCT_BEGIN
struct ethip_hdr {
  PACK_STRUCT_FIELD(struct eth_hdr eth);
  PACK_STRUCT_FIELD(struct ip_hdr ip);
} PACK_STRUCT_STRUCT;
PACK_STRUCT_END


#ifdef PACK_STRUCT_USE_INCLUDES
#  include "arch/epstruct.h"
#endif


void etharp_init(void);
void etharp_tmr(void);
void etharp_ip_input(struct netif *netif, struct pbuf *p);
void etharp_arp_input(struct netif *netif, struct eth_addr *ethaddr,
         struct pbuf *p);
err_t etharp_output(struct netif *netif, struct ip_addr *ipaddr,
         struct pbuf *q);
err_t etharp_query(struct netif *netif, struct ip_addr *ipaddr, struct pbuf *q);
err_t etharp_request(struct netif *netif, struct ip_addr *ipaddr);

//from 0.5.3version added by dy
/* arp_loopup() is called to do an IP address -> Ethernet address
   translation. If the function returns NULL, there is no mapping and
   the arp_query() function should be called. */
struct eth_addr *arp_lookup(struct ip_addr *ipaddr);

/* Constructs an ARP query packet for the given IP address. The
   function returns a pbuf that contains the reply and that should be
   sent out on the Ethernet. */
struct pbuf *arp_query(struct netif *netif, struct eth_addr *ethaddr,
		       struct ip_addr *ipaddr);

#endif /* __NETIF_ARP_H__ */