1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
/*!
Module for utils of IP and Port.
*/
use std::net::IpAddr;
/// TODO: replace with https://doc.rust-lang.org/std/net/struct.Ipv4Addr.html#method.is_global when it is stabilized
pub trait IsGlobal {
/// checkif IP is not a LAN ip
fn is_global(&self) -> bool;
}
impl IsGlobal for IpAddr {
/// TODO: replace with https://doc.rust-lang.org/std/net/struct.Ipv4Addr.html#method.is_global when it is stabilized
fn is_global(&self) -> bool {
if self.is_loopback() {
return false;
}
match *self {
IpAddr::V4(ipv4) => {
let addrs = ipv4.octets();
/* 10.0.0.0 to 10.255.255.255 range. */
if addrs[0] == 10 {
return false;
}
/* 172.16.0.0 to 172.31.255.255 range. */
if addrs[0] == 172 && addrs[1] >= 16 && addrs[1] <= 31 {
return false;
}
/* 192.168.0.0 to 192.168.255.255 range. */
if addrs[0] == 192 && addrs[1] == 168 {
return false;
}
/* 169.254.1.0 to 169.254.254.255 range. */
if addrs[0] == 169 && addrs[1] == 254 && addrs[2] != 0 && addrs[2] != 255 {
return false;
}
/* RFC 6598: 100.64.0.0 to 100.127.255.255 (100.64.0.0/10)
* (shared address space to stack another layer of NAT) */
if addrs[0] == 100 && (addrs[1] & 0xC0) == 0x40 {
return false;
}
},
IpAddr::V6(ipv6) => {
let addrs = ipv6.octets();
/* autogenerated for each interface: FE80::* (up to FEBF::*)
FF02::1 is - according to RFC 4291 - multicast all-nodes link-local */
if (addrs[0] == 0xFF && addrs[1] < 3 && addrs[15] == 1) ||
(addrs[0] == 0xFE && (addrs[1] & 0xC0) == 0x80) {
return false;
}
/* embedded IPv4-in-IPv6 */
if let Some(ipv4) = ipv6.to_ipv4() {
return IsGlobal::is_global(&IpAddr::V4(ipv4));
} else {}
},
};
true
}
}
#[cfg(test)]
mod tests {
use super::*;
use std::net::Ipv4Addr;
use std::str::FromStr;
#[test]
fn is_global_test() {
let ipv4 = "127.0.0.1".parse().unwrap();
assert!(!IsGlobal::is_global(&IpAddr::V4(ipv4)));
let ipv6 = Ipv4Addr::from_str("127.0.0.1").unwrap().to_ipv6_mapped();
assert!(!IsGlobal::is_global(&IpAddr::V6(ipv6)));
let ipv6 = "::1".parse().unwrap();
assert!(!IsGlobal::is_global(&IpAddr::V6(ipv6)));
let ipv4 = "10.0.0.1".parse().unwrap();
assert!(!IsGlobal::is_global(&IpAddr::V4(ipv4)));
let ipv4 = "192.168.0.1".parse().unwrap();
assert!(!IsGlobal::is_global(&IpAddr::V4(ipv4)));
let ipv4 = "169.254.1.1".parse().unwrap();
assert!(!IsGlobal::is_global(&IpAddr::V4(ipv4)));
let ipv4 = "100.64.0.1".parse().unwrap();
assert!(!IsGlobal::is_global(&IpAddr::V4(ipv4)));
let ipv6 = "FF02::1".parse().unwrap();
assert!(!IsGlobal::is_global(&IpAddr::V6(ipv6)));
let ipv6 = Ipv4Addr::from_str("192.168.0.1").unwrap().to_ipv6_mapped();
assert!(!IsGlobal::is_global(&IpAddr::V6(ipv6)));
// global ip
let ipv4 = "128.0.0.1".parse().unwrap();
assert!(IsGlobal::is_global(&IpAddr::V4(ipv4)));
}
}