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
|
package proxyproto
// AddressFamilyAndProtocol represents address family and transport protocol.
type AddressFamilyAndProtocol byte
const (
UNSPEC AddressFamilyAndProtocol = '\x00'
TCPv4 AddressFamilyAndProtocol = '\x11'
UDPv4 AddressFamilyAndProtocol = '\x12'
TCPv6 AddressFamilyAndProtocol = '\x21'
UDPv6 AddressFamilyAndProtocol = '\x22'
UnixStream AddressFamilyAndProtocol = '\x31'
UnixDatagram AddressFamilyAndProtocol = '\x32'
)
// IsIPv4 returns true if the address family is IPv4 (AF_INET4), false otherwise.
func (ap AddressFamilyAndProtocol) IsIPv4() bool {
return ap&0xF0 == 0x10
}
// IsIPv6 returns true if the address family is IPv6 (AF_INET6), false otherwise.
func (ap AddressFamilyAndProtocol) IsIPv6() bool {
return ap&0xF0 == 0x20
}
// IsUnix returns true if the address family is UNIX (AF_UNIX), false otherwise.
func (ap AddressFamilyAndProtocol) IsUnix() bool {
return ap&0xF0 == 0x30
}
// IsStream returns true if the transport protocol is TCP or STREAM (SOCK_STREAM), false otherwise.
func (ap AddressFamilyAndProtocol) IsStream() bool {
return ap&0x0F == 0x01
}
// IsDatagram returns true if the transport protocol is UDP or DGRAM (SOCK_DGRAM), false otherwise.
func (ap AddressFamilyAndProtocol) IsDatagram() bool {
return ap&0x0F == 0x02
}
// IsUnspec returns true if the transport protocol or address family is unspecified, false otherwise.
func (ap AddressFamilyAndProtocol) IsUnspec() bool {
return (ap&0xF0 == 0x00) || (ap&0x0F == 0x00)
}
func (ap AddressFamilyAndProtocol) toByte() byte {
if ap.IsIPv4() && ap.IsStream() {
return byte(TCPv4)
} else if ap.IsIPv4() && ap.IsDatagram() {
return byte(UDPv4)
} else if ap.IsIPv6() && ap.IsStream() {
return byte(TCPv6)
} else if ap.IsIPv6() && ap.IsDatagram() {
return byte(UDPv6)
} else if ap.IsUnix() && ap.IsStream() {
return byte(UnixStream)
} else if ap.IsUnix() && ap.IsDatagram() {
return byte(UnixDatagram)
}
return byte(UNSPEC)
}
|
