1 #ifndef _IP_H_
2 #define _IP_H_ 1
3 #if defined(__cplusplus)
4 extern "C" { 
5 #endif
6 /*
7 #pragma	src	"/sys/src/libip"
8 #pragma	lib	"libip.a"
9 #pragma	varargck	type	"I"	uchar*
10 #pragma	varargck	type	"V"	uchar*
11 #pragma	varargck	type	"E"	uchar*
12 #pragma	varargck	type	"M"	uchar*
13 */
14 enum 
15 {
16 	IPaddrlen=	16,
17 	IPv4addrlen=	4,
18 	IPv4off=	12,
19 	IPllen=		4,
20 };
21 
22 /*
23  *  for reading /net/ipifc
24  */
25 typedef struct Ipifc Ipifc;
26 typedef struct Iplifc Iplifc;
27 typedef struct Ipv6rp Ipv6rp;
28 
29 /* local address */
30 struct Iplifc
31 {
32 	Iplifc	*next;
33 
34 	/* per address on the ip interface */
35 	uchar	ip[IPaddrlen];
36 	uchar	mask[IPaddrlen];
37 	uchar	net[IPaddrlen];		/* ip & mask */
38 	ulong	preflt;			/* preferred lifetime */
39 	ulong	validlt;		/* valid lifetime */
40 };
41 
42 /* default values, one per stack */
43 struct Ipv6rp
44 {
45 	int	mflag;
46 	int	oflag;
47 	int 	maxraint;
48 	int	minraint;
49 	int	linkmtu;
50 	int	reachtime;
51 	int	rxmitra;
52 	int	ttl;
53 	int	routerlt;	
54 };
55 
56 /* actual interface */
57 struct Ipifc
58 {
59 	Ipifc	*next;
60 	Iplifc	*lifc;
61 
62 	/* per ip interface */
63 	int	index;			/* number of interface in ipifc dir */
64 	char	dev[64];
65 	uchar	sendra6;		/* on == send router adv */
66 	uchar	recvra6;		/* on == rcv router adv */
67 	int	mtu;
68 	ulong	pktin;
69 	ulong	pktout;
70 	ulong	errin;
71 	ulong	errout;
72 	Ipv6rp	rp;
73 };
74 
75 /*
76  *  user level udp headers
77  */
78 enum 
79 {
80 	Udphdrsize=	36,	/* size of a Udphdr */
81 };
82 
83 typedef struct Udphdr Udphdr;
84 struct Udphdr
85 {
86 	uchar	raddr[IPaddrlen];	/* remote address and port */
87 	uchar	laddr[IPaddrlen];	/* local address and port */
88 	uchar	rport[2];
89 	uchar	lport[2];
90 };
91 
92 uchar*	defmask(uchar*);
93 void	maskip(uchar*, uchar*, uchar*);
94 int	eipfmt(Fmt*);
95 int	isv4(uchar*);
96 ulong	parseip(uchar*, char*);
97 ulong	parseipmask(uchar*, char*);
98 char*	v4parseip(uchar*, char*);
99 char*	v4parsecidr(uchar*, uchar*, char*);
100 int	parseether(uchar*, char*);
101 int	myipaddr(uchar*, char*);
102 int	myetheraddr(uchar*, char*);
103 int	equivip(uchar*, uchar*);
104 
105 Ipifc*	readipifc(char*, Ipifc*, int);
106 
107 void	hnputl(void*, uint);
108 void	hnputs(void*, ushort);
109 uint	nhgetl(void*);
110 ushort	nhgets(void*);
111 ushort	ptclbsum(uchar*, int);
112 
113 int	v6tov4(uchar*, uchar*);
114 void	v4tov6(uchar*, uchar*);
115 
116 #define	ipcmp(x, y) memcmp(x, y, IPaddrlen)
117 #define	ipmove(x, y) memmove(x, y, IPaddrlen)
118 
119 extern uchar IPv4bcast[IPaddrlen];
120 extern uchar IPv4bcastobs[IPaddrlen];
121 extern uchar IPv4allsys[IPaddrlen];
122 extern uchar IPv4allrouter[IPaddrlen];
123 extern uchar IPnoaddr[IPaddrlen];
124 extern uchar v4prefix[IPaddrlen];
125 extern uchar IPallbits[IPaddrlen];
126 
127 #define CLASS(p) ((*(uchar*)(p))>>6)
128 
129 #if defined(__cplusplus)
130 }
131 #endif
132 #endif