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/* from <ip.h> */
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enum
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{
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	ETHER_HDR	= 14,
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	ET_IP		= 0x800,
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	IP_VER		= 0x40,
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	IP_HLEN		= 0x05,
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 	IP_UDPPROTO	= 17,
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	UDP_EHSIZE	= 22,
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	UDP_PHDRSIZE	= 12,
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	UDP_HDRSIZE	= 20,
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	BPportsrc	= 68,
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	BPportdst	= 67,
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	Bootrequest 	= 1,
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	Bootreply   	= 2,
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	TFTPport	= 69,
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//	Timeout		= 5000,	/* milliseconds */
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	Timeout		= 2000,	/* milliseconds */
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	Tftp_READ	= 1,
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	Tftp_WRITE	= 2,
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	Tftp_DATA	= 3,
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	Tftp_ACK	= 4,
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	Tftp_ERROR	= 5,
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	Tftp_OACK	= 6,		/* extension: option(s) ack */
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	Defsegsize	= 512,
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	/* lengths of some bootp fields */
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	Maxhwlen=	16,
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	Maxfilelen=	128,
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	Maxoptlen=	312-4,
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	/* bootp option types */
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	OBend=			255,
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	OBpad=			0,
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	OBmask=			1,
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};
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/*
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 *  user level udp headers with control message "headers"
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 */
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enum
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{
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	Udphdrsize=	52,	/* size of a Udphdr */
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};
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typedef struct Udphdr Udphdr;
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struct Udphdr
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{
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	uchar	raddr[IPaddrlen];	/* V6 remote address */
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	uchar	laddr[IPaddrlen];	/* V6 local address */
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	uchar	ifcaddr[IPaddrlen];	/* V6 ifc addr msg was received on */
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	uchar	rport[2];		/* remote port */
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	uchar	lport[2];		/* local port */
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};
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/*
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 * from 9load
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 */
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typedef struct Bootp Bootp;
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struct Bootp
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{
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	uchar	op;		/* opcode */
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	uchar	htype;		/* hardware type */
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	uchar	hlen;		/* hardware address len */
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	uchar	hops;		/* hops */
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	uchar	xid[4];		/* a random number */
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	uchar	secs[2];	/* elapsed since client started booting */
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	uchar	flags[2];	/* unused in bootp, flags in dhcp */
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	uchar	ciaddr[4];	/* client IP address (client tells server) */
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	uchar	yiaddr[4];	/* client IP address (server tells client) */
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	uchar	siaddr[4];	/* server IP address */
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	uchar	giaddr[4];	/* gateway IP address */
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	uchar	chaddr[16];	/* client hardware address */
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	char	sname[64];	/* server host name (optional) */
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	char	file[128];	/* boot file name */
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//	char	vend[128];	/* vendor-specific goo */
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	uchar	optmagic[4];
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	uchar	optdata[Maxoptlen];
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};
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typedef struct Pxenetaddr Pxenetaddr;
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struct Pxenetaddr
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{
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	uchar	ip[IPaddrlen];
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	ushort	port;
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};
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extern int chatty;