1 /*
2 #pragma	src	"/sys/src/libip"
3 #pragma	lib	"libip.a"
4 #pragma	varargck	type	"I"	uchar*
5 #pragma	varargck	type	"V"	uchar*
6 #pragma	varargck	type	"E"	uchar*
7 #pragma	varargck	type	"M"	uchar*
8 */
9 enum 
10 {
11 	IPaddrlen=	16,
12 	IPv4addrlen=	4,
13 	IPv4off=	12,
14 	IPllen=		4,
15 };
16 
17 /*
18  *  for reading /net/ipifc
19  */
20 typedef struct Ipifc Ipifc;
21 typedef struct Iplifc Iplifc;
22 typedef struct Ipv6rp Ipv6rp;
23 
24 /* local address */
25 struct Iplifc
26 {
27 	Iplifc	*next;
28 
29 	/* per address on the ip interface */
30 	uchar	ip[IPaddrlen];
31 	uchar	mask[IPaddrlen];
32 	uchar	net[IPaddrlen];		/* ip & mask */
33 	ulong	preflt;			/* preferred lifetime */
34 	ulong	validlt;		/* valid lifetime */
35 };
36 
37 /* default values, one per stack */
38 struct Ipv6rp
39 {
40 	int	mflag;
41 	int	oflag;
42 	int 	maxraint;
43 	int	minraint;
44 	int	linkmtu;
45 	int	reachtime;
46 	int	rxmitra;
47 	int	ttl;
48 	int	routerlt;	
49 };
50 
51 /* actual interface */
52 struct Ipifc
53 {
54 	Ipifc	*next;
55 	Iplifc	*lifc;
56 
57 	/* per ip interface */
58 	int	index;			/* number of interface in ipifc dir */
59 	char	dev[64];
60 	uchar	sendra6;		/* on == send router adv */
61 	uchar	recvra6;		/* on == rcv router adv */
62 	int	mtu;
63 	ulong	pktin;
64 	ulong	pktout;
65 	ulong	errin;
66 	ulong	errout;
67 	Ipv6rp	rp;
68 };
69 
70 /*
71  *  user level udp headers
72  */
73 enum 
74 {
75 	Udphdrsize=	36,	/* size of a Udphdr */
76 };
77 
78 typedef struct Udphdr Udphdr;
79 struct Udphdr
80 {
81 	uchar	raddr[IPaddrlen];	/* remote address and port */
82 	uchar	laddr[IPaddrlen];	/* local address and port */
83 	uchar	rport[2];
84 	uchar	lport[2];
85 };
86 
87 uchar*	defmask(uchar*);
88 void	maskip(uchar*, uchar*, uchar*);
89 int	eipfmt(Fmt*);
90 int	isv4(uchar*);
91 ulong	parseip(uchar*, char*);
92 ulong	parseipmask(uchar*, char*);
93 char*	v4parseip(uchar*, char*);
94 char*	v4parsecidr(uchar*, uchar*, char*);
95 int	parseether(uchar*, char*);
96 int	myipaddr(uchar*, char*);
97 int	myetheraddr(uchar*, char*);
98 int	equivip(uchar*, uchar*);
99 
100 Ipifc*	readipifc(char*, Ipifc*, int);
101 
102 void	hnputl(void*, uint);
103 void	hnputs(void*, ushort);
104 uint	nhgetl(void*);
105 ushort	nhgets(void*);
106 ushort	ptclbsum(uchar*, int);
107 
108 int	v6tov4(uchar*, uchar*);
109 void	v4tov6(uchar*, uchar*);
110 
111 #define	ipcmp(x, y) memcmp(x, y, IPaddrlen)
112 #define	ipmove(x, y) memmove(x, y, IPaddrlen)
113 
114 extern uchar IPv4bcast[IPaddrlen];
115 extern uchar IPv4bcastobs[IPaddrlen];
116 extern uchar IPv4allsys[IPaddrlen];
117 extern uchar IPv4allrouter[IPaddrlen];
118 extern uchar IPnoaddr[IPaddrlen];
119 extern uchar v4prefix[IPaddrlen];
120 extern uchar IPallbits[IPaddrlen];
121 
122 #define CLASS(p) ((*(uchar*)(p))>>6)
123