/* from <ip.h> */

enum
{
	ETHER_HDR	= 14,
	ET_IP		= 0x800,

	IP_VER		= 0x40,
	IP_HLEN		= 0x05,			
 	IP_UDPPROTO	= 17,

	UDP_EHSIZE	= 22,
	UDP_PHDRSIZE	= 12,
	UDP_HDRSIZE	= 20,

	BPportsrc	= 68,
	BPportdst	= 67,
	Bootrequest 	= 1,
	Bootreply   	= 2,

	TFTPport	= 69,
//	Timeout		= 5000,	/* milliseconds */
	Timeout		= 2000,	/* milliseconds */
	Tftp_READ	= 1,
	Tftp_WRITE	= 2,
	Tftp_DATA	= 3,
	Tftp_ACK	= 4,
	Tftp_ERROR	= 5,
	Tftp_OACK	= 6,		/* extension: option(s) ack */
	Defsegsize	= 512,

	/* lengths of some bootp fields */
	Maxhwlen=	16,
	Maxfilelen=	128,
	Maxoptlen=	312-4,

	/* bootp option types */
	OBend=			255,
	OBpad=			0,
	OBmask=			1,
};

/*
 *  user level udp headers with control message "headers"
 */
enum 
{
	Udphdrsize=	52,	/* size of a Udphdr */
};

typedef struct Udphdr Udphdr;
struct Udphdr
{
	uchar	raddr[IPaddrlen];	/* V6 remote address */
	uchar	laddr[IPaddrlen];	/* V6 local address */
	uchar	ifcaddr[IPaddrlen];	/* V6 ifc addr msg was received on */
	uchar	rport[2];		/* remote port */
	uchar	lport[2];		/* local port */
};

/*
 * from 9load
 */
typedef struct Bootp Bootp;
struct Bootp
{
	uchar	op;		/* opcode */
	uchar	htype;		/* hardware type */
	uchar	hlen;		/* hardware address len */
	uchar	hops;		/* hops */
	uchar	xid[4];		/* a random number */
	uchar	secs[2];	/* elapsed since client started booting */
	uchar	flags[2];	/* unused in bootp, flags in dhcp */
	uchar	ciaddr[4];	/* client IP address (client tells server) */
	uchar	yiaddr[4];	/* client IP address (server tells client) */
	uchar	siaddr[4];	/* server IP address */
	uchar	giaddr[4];	/* gateway IP address */
	uchar	chaddr[16];	/* client hardware address */
	char	sname[64];	/* server host name (optional) */
	char	file[128];	/* boot file name */

//	char	vend[128];	/* vendor-specific goo */
	uchar	optmagic[4];
	uchar	optdata[Maxoptlen];
};

typedef struct Pxenetaddr Pxenetaddr;
struct Pxenetaddr
{
	uchar	ip[IPaddrlen];
	ushort	port;
};

extern int chatty;