ether.h

uC/IP源代码 2003-08-16[摘][码] 该软件是本人在ucos_ii基础上加上网络功能

/* 
 * $Id: ETHER.H,v 1.3 2002/02/07 10:25:41 linfusheng Exp $
 */

#ifndef ETHER_H
#define ETHER_H

/* Standard interface flags (netdevice->flags). */
#define	IFF_UP		0x1		/* interface is up		*/
#define	IFF_BROADCAST	0x2		/* broadcast address valid	*/
#define	IFF_DEBUG	0x4		/* turn on debugging		*/
#define	IFF_LOOPBACK	0x8		/* is a loopback net		*/
#define	IFF_POINTOPOINT	0x10		/* interface is has p-p link	*/
#define	IFF_NOTRAILERS	0x20		/* avoid use of trailers	*/
#define	IFF_RUNNING	0x40		/* resources allocated		*/
#define	IFF_NOARP	0x80		/* no ARP protocol		*/
#define	IFF_PROMISC	0x100		/* receive all packets		*/
#define	IFF_ALLMULTI	0x200		/* receive all multicast packets*/

#define IFF_MASTER	0x400		/* master of a load balancer 	*/
#define IFF_SLAVE	0x800		/* slave of a load balancer	*/

#define IFF_MULTICAST	0x1000		/* Supports multicast		*/

#define IFF_VOLATILE	(IFF_LOOPBACK|IFF_POINTOPOINT|IFF_BROADCAST|IFF_MASTER|IFF_SLAVE|IFF_RUNNING)

#define IFF_PORTSEL	0x2000          /* can set media type		*/
#define IFF_AUTOMEDIA	0x4000		/* auto media select active	*/
#define IFF_DYNAMIC	0x8000		/* dialup device with changing addresses*/

/* Private (from user) interface flags (netdevice->priv_flags). */
#define IFF_802_1Q_VLAN 0x1             /* 802.1Q VLAN device.          */




/* ARP protocol opcodes. */
#define	ARPOP_REQUEST	1		/* ARP request.  */
#define	ARPOP_REPLY	2		/* ARP reply.  */
#define	ARPOP_RREQUEST	3		/* RARP request.  */
#define	ARPOP_RREPLY	4		/* RARP reply.  */
#define	ARPOP_InREQUEST	8		/* InARP request.  */
#define	ARPOP_InREPLY	9		/* InARP reply.  */
#define	ARPOP_NAK	10		/* (ATM)ARP NAK.  */



/* ARP protocol HARDWARE identifiers. */
#define ARPHRD_NETROM	0		/* From KA9Q: NET/ROM pseudo. */
#define ARPHRD_ETHER 	1		/* Ethernet 10/100Mbps.  */
#define	ARPHRD_EETHER	2		/* Experimental Ethernet.  */
#define	ARPHRD_AX25	3		/* AX.25 Level 2.  */
#define	ARPHRD_PRONET	4		/* PROnet token ring.  */
#define	ARPHRD_CHAOS	5		/* Chaosnet.  */
#define	ARPHRD_IEEE802	6		/* IEEE 802.2 Ethernet/TR/TB.  */
#define	ARPHRD_ARCNET	7		/* ARCnet.  */
#define	ARPHRD_APPLETLK	8		/* APPLEtalk.  */
#define	ARPHRD_DLCI	15		/* Frame Relay DLCI.  */
#define	ARPHRD_ATM	19		/* ATM.  */
#define	ARPHRD_METRICOM	23		/* Metricom STRIP (new IANA id).  */



/* Ethernet protocol ID's */
#define	ETHERTYPE_PUP		0x0200          /* Xerox PUP */
#define	ETHERTYPE_IP		0x0800		/* IP */
#define	ETHERTYPE_ARP		0x0806		/* Address resolution */
#define	ETHERTYPE_REVARP	0x8035		/* Reverse ARP */


/* Standard well-defined IP protocols.  */
enum {
  IPPROTO_IP = 0,		/* Dummy protocol for TCP		*/
  IPPROTO_ICMP = 1,		/* Internet Control Message Protocol	*/
  IPPROTO_IGMP = 2,		/* Internet Group Management Protocol	*/
  IPPROTO_IPIP = 4,		/* IPIP tunnels (older KA9Q tunnels use 94) */
  IPPROTO_TCP = 6,		/* Transmission Control Protocol	*/
  IPPROTO_EGP = 8,		/* Exterior Gateway Protocol		*/
  IPPROTO_PUP = 12,		/* PUP protocol				*/
  IPPROTO_UDP = 17,		/* User Datagram Protocol		*/
  IPPROTO_IDP = 22,		/* XNS IDP protocol			*/
  IPPROTO_RSVP = 46,		/* RSVP protocol			*/
  IPPROTO_GRE = 47,		/* Cisco GRE tunnels (rfc 1701,1702)	*/

  IPPROTO_IPV6	 = 41,		/* IPv6-in-IPv4 tunnelling		*/

  IPPROTO_PIM    = 103,		/* Protocol Independent Multicast	*/

  IPPROTO_ESP = 50,            /* Encapsulation Security Payload protocol */
  IPPROTO_AH = 51,             /* Authentication Header protocol       */
  IPPROTO_COMP   = 108,                /* Compression Header protocol */

  IPPROTO_RAW	 = 255,		/* Raw IP packets			*/
  IPPROTO_MAX
};





/*
   I'm moving towards the defined names in linux/if_ether.h for clarity.
   The confusion between 60/64 and 1514/1518 arose because the NS8390
   counts the 4 byte frame checksum in the incoming packet, but not
   in the outgoing packet. 60/1514 are the correct numbers for most
   if not all of the other NIC controllers. I will be retiring the
   64/1518 defines in the lead-up to 5.0.
*/




#define ETH_ALEN		6	/* Size of Ethernet address */
#define ETH_HLEN		14	/* Size of ethernet header */
#define	ETH_ZLEN		60	/* Minimum packet */
/*#define ETH_MIN_PACKET		64*/
#define	ETH_FRAME_LEN		1514	/* Maximum packet */
/* max supported ethernet frame size -- must be at least (dev->mtu+14+4).*/
#define MAX_ETH_FRAME_SIZE	1536


/* Same after going through htonl */
#define IP_BROADCAST	0xFFFFFFFF

#define BA { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }




struct in_addr{
	unsigned long	s_addr;
};

struct arptable_t {
	struct in_addr ipaddr;
	unsigned char node[6];
};



/* 10Mb/s ethernet header */
struct ethhdr
{
  unsigned char ether_dhost[ETH_ALEN];	/* destination eth addr	*/
  unsigned char ether_shost[ETH_ALEN];	/* source ether addr	*/
  unsigned short ether_type;		        /* packet type ID field	*/
};

struct arphdr
{
    unsigned short ar_hrd;		/* Format of hardware address.  */
    unsigned short ar_pro;		/* Format of protocol address.  */
    unsigned char ar_hln;		/* Length of hardware address.  */
    unsigned char ar_pln;		/* Length of protocol address.  */
    unsigned short ar_op;		/* ARP opcode (command).  */

};


/*
 * Ethernet Address Resolution Protocol.
 *
 * See RFC 826 for protocol description.  Structure below is adapted
 * to resolving internet addresses.  Field names used correspond to
 * RFC 826.
 */
struct	ether_arp {
	struct	arphdr ea_hdr;		/* fixed-size header */
	unsigned char arp_sha[ETH_ALEN];	/* sender hardware address */
	unsigned char arp_spa[4];		/* sender protocol address */
	unsigned char arp_tha[ETH_ALEN];	/* target hardware address */
	unsigned char arp_tpa[4];		/* target protocol address */
};

#define	arp_hrd	ea_hdr.ar_hrd
#define	arp_pro	ea_hdr.ar_pro
#define	arp_hln	ea_hdr.ar_hln
#define	arp_pln	ea_hdr.ar_pln
#define	arp_op	ea_hdr.ar_op


/*
 * A pity sipaddr and tipaddr are not longword aligned or we could use
 * in_addr. No, I don't want to use #pragma packed.
 */
struct arprequest {
	unsigned short hwtype;
	unsigned short protocol;
	unsigned char hwlen;
	unsigned char protolen;
	unsigned short opcode;
	unsigned char shwaddr[6];
	unsigned char sipaddr[4];
	unsigned char thwaddr[6];
	unsigned char tipaddr[4];
};

struct iphdr {
//	unsigned char verhdrlen :4;
	unsigned char ihl:4;
	unsigned char version:4;

	unsigned char tos;
	unsigned short tot_len;
	unsigned short id;
	unsigned short frag_off;
	unsigned char ttl;
	unsigned char protocol;
	unsigned short check;
	struct in_addr src;
	struct in_addr dest;
};

struct udphdr {
	unsigned short src;
	unsigned short dest;
	unsigned short len;
	unsigned short chksum;
};

struct icmphdr {
	u_char		type;
	u_char		code;
	u_short		checksum;
	union {
		struct {
			u_short	id;
			u_short	sequence;
		} echo;
		u_long	gateway;
		struct {
			u_short	__unused;
			u_short	mtu;
		} frag;
	} un;
};



extern int arprecv(struct nbuf *nbuf);
extern int iprecv(struct nbuf *nbuf);
extern int icmprecv(struct nbuf *nbuf);
#endif

/* $Log: ETHER.H,v $
/* Revision 1.3  2002/02/07 10:25:41  linfusheng
/* update
/*
/* Revision 1.2  2002/01/28 00:46:25  linfusheng
/* update
/*
 */