#pragma	src	"/sys/src/libip"#pragma	lib	"libip.a" enum {	IPaddrlen=	16,	IPv4addrlen=	4,	IPv4off=	12,	IPllen=		4,}; /* *  for reading /net/ipifc */typedef struct Ipifc Ipifc;typedef struct Iplifc Iplifc;typedef struct Ipv6rp Ipv6rp; /* local address */struct Iplifc{	Iplifc	*next; 	/* per address on the ip interface */	uchar	ip[IPaddrlen];	uchar	mask[IPaddrlen];	uchar	net[IPaddrlen];		/* ip & mask */	ulong	preflt;			/* preferred lifetime */	ulong	validlt;		/* valid lifetime */}; /* default values, one per stack */struct Ipv6rp{	int	mflag;	int	oflag;	int 	maxraint;	int	minraint;	int	linkmtu;	int	reachtime;	int	rxmitra;	int	ttl;	int	routerlt;	}; /* actual interface */struct Ipifc{	Ipifc	*next;	Iplifc	*lifc; 	/* per ip interface */	int	index;			/* number of interface in ipifc dir */	char	dev[64];	uchar	sendra6;		/* on == send router adv */	uchar	recvra6;		/* on == rcv router adv */	int	mtu;	ulong	pktin;	ulong	pktout;	ulong	errin;	ulong	errout;	Ipv6rp	rp;}; /* *  user level udp headers */enum {	Udphdrsize=	36,	/* size of a Udphdr */}; typedef struct Udphdr Udphdr;struct Udphdr{	uchar	raddr[IPaddrlen];	/* remote address and port */	uchar	laddr[IPaddrlen];	/* local address and port */	uchar	rport[2];	uchar	lport[2];}; uchar*	defmask(uchar*);void	maskip(uchar*, uchar*, uchar*);int	eipfmt(Fmt*);int	isv4(uchar*);ulong	parseip(uchar*, char*);ulong	parseipmask(uchar*, char*);char*	v4parseip(uchar*, char*);char*	v4parsecidr(uchar*, uchar*, char*);int	parseether(uchar*, char*);int	myipaddr(uchar*, char*);int	myetheraddr(uchar*, char*);int	equivip(uchar*, uchar*); Ipifc*	readipifc(char*, Ipifc*, int); void	hnputl(void*, uint);void	hnputs(void*, ushort);uint	nhgetl(void*);ushort	nhgets(void*);ushort	ptclbsum(uchar*, int); int	v6tov4(uchar*, uchar*);void	v4tov6(uchar*, uchar*); #define	ipcmp(x, y) memcmp(x, y, IPaddrlen)#define	ipmove(x, y) memmove(x, y, IPaddrlen) extern uchar IPv4bcast[IPaddrlen];extern uchar IPv4bcastobs[IPaddrlen];extern uchar IPv4allsys[IPaddrlen];extern uchar IPv4allrouter[IPaddrlen];extern uchar IPnoaddr[IPaddrlen];extern uchar v4prefix[IPaddrlen];extern uchar IPallbits[IPaddrlen]; #define CLASS(p) ((*(uchar*)(p))>>6) #pragma	varargck	type	"I"	uchar*#pragma	varargck	type	"V"	uchar*#pragma	varargck	type	"E"	uchar*#pragma	varargck	type	"M"	uchar*