new files

include/ip.h

@@ -0,0 +1,123 @@
+/*
+#pragma	src	"/sys/src/libip"
+#pragma	lib	"libip.a"
+#pragma	varargck	type	"I"	uchar*
+#pragma	varargck	type	"V"	uchar*
+#pragma	varargck	type	"E"	uchar*
+#pragma	varargck	type	"M"	uchar*
+*/
+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)
+