1 #pragma	src	"/sys/src/libip"
2 #pragma	lib	"libip.a"
3 
4 enum 
5 {
6 	IPaddrlen=	16,
7 	IPv4addrlen=	4,
8 	IPv4off=	12,
9 	IPllen=		4,
10 };
11 
12 /*
13  *  for reading /net/ipifc
14  */
15 typedef struct Ipifc Ipifc;
16 typedef struct Ipifcs Ipifcs;
17 
18 struct Ipifc
19 {
20 	char	dev[64];
21 	uchar	ip[IPaddrlen];
22 	uchar	mask[IPaddrlen];
23 	uchar	net[IPaddrlen];		/* ip & mask */
24 	Ipifc	*next;
25 };
26 
27 struct Ipifcs
28 {
29 	Ipifc *first;
30 	Ipifc *last;
31 };
32 
33 /*
34  *  user level udp headers
35  */
36 enum 
37 {
38 	Udphdrsize=	36,	/* size of a Udphdr */
39 };
40 
41 typedef struct Udphdr Udphdr;
42 struct Udphdr
43 {
44 	uchar	raddr[IPaddrlen];	/* remote address and port */
45 	uchar	laddr[IPaddrlen];	/* local address and port */
46 	uchar	rport[2];
47 	uchar	lport[2];
48 };
49 
50 uchar*	defmask(uchar*);
51 void	maskip(uchar*, uchar*, uchar*);
52 int	eipconv(va_list*, Fconv*);
53 ulong	parseip(uchar*, char*);
54 ulong	parseipmask(uchar*, char*);
55 int	parseether(uchar*, char*);
56 int	myipaddr(uchar*, char*);
57 int	myetheraddr(uchar*, char*);
58 
59 void	readipifc(char*, Ipifcs*);
60 
61 void	hnputl(void*, uint);
62 void	hnputs(void*, ushort);
63 uint	nhgetl(void*);
64 ushort	nhgets(void*);
65 
66 #define	ipcmp(x, y) memcmp(x, y, IPaddrlen)
67 #define	ipmove(x, y) memmove(x, y, IPaddrlen)
68 
69 extern uchar IPv4bcast[IPaddrlen];
70 extern uchar IPv4bcastobs[IPaddrlen];
71 extern uchar IPv4allsys[IPaddrlen];
72 extern uchar IPv4allrouter[IPaddrlen];
73 extern uchar IPnoaddr[IPaddrlen];
74 extern uchar v4prefix[IPaddrlen];
75 extern uchar IPallbits[IPaddrlen];
76 
77 #define CLASS(p) ((*(uchar*)(p))>>6)