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
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
|
# Real world test outputs
## Test code
```go
package main
import (
"fmt"
"lib/gateway"
"runtime"
)
func main() {
fmt.Printf("OS: %s\n", runtime.GOOS)
gw, err := gateway.DiscoverGateway()
if err == nil {
fmt.Printf("Gateway: %v\n", gw)
} else {
fmt.Printf("Gateway error: %s", err)
}
iface, err := gateway.DiscoverInterface()
if err == nil {
fmt.Printf("Iface: %v\n", iface)
} else {
fmt.Printf("Iface error: %s", err)
}
}
```
## Darwin
I don't have a Mac, nor am I prepared to pay $26 to spin one up in AWS (minimum charge 24 hours), but since it's using the same code path as the BSDs below and the unit tests work, I expect it to work.
## Solaris
AWS doesn't have any Solaris instances I can find, however the same goes for unit tests as for Darwin.
## FreeBSD
```
ec2-user@freebsd:~/src/gateway-test $ go run test.go
OS: freebsd
Gateway: 172.31.32.1
Iface: 172.31.32.246
ec2-user@freebsd:~/src/gateway-test $ netstat -rn
Routing tables
Internet:
Destination Gateway Flags Netif Expire
default 172.31.32.1 UGS xn0
127.0.0.1 link#1 UH lo0
172.31.32.0/20 link#2 U xn0
172.31.32.246 link#2 UHS lo0
Internet6:
Destination Gateway Flags Netif Expire
::/96 ::1 URS lo0
::1 link#1 UHS lo0
::ffff:0.0.0.0/96 ::1 URS lo0
fe80::/10 ::1 URS lo0
fe80::%lo0/64 link#1 U lo0
fe80::1%lo0 link#1 UHS lo0
fe80::%xn0/64 link#2 U xn0
fe80::8db:f4ff:fe5b:2fd3%xn0 link#2 UHS lo0
ff02::/16 ::1 URS lo0
ec2-user@freebsd:~/src/gateway-test $ ifconfig
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
options=680003<RXCSUM,TXCSUM,LINKSTATE,RXCSUM_IPV6,TXCSUM_IPV6>
inet6 ::1 prefixlen 128
inet6 fe80::1%lo0 prefixlen 64 scopeid 0x1
inet 127.0.0.1 netmask 0xff000000
groups: lo
nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
xn0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 9001
options=503<RXCSUM,TXCSUM,TSO4,LRO>
ether 0a:db:f4:5b:2f:d3
inet6 fe80::8db:f4ff:fe5b:2fd3%xn0 prefixlen 64 scopeid 0x2
inet 172.31.32.246 netmask 0xfffff000 broadcast 172.31.47.255
media: Ethernet manual
status: active
nd6 options=23<PERFORMNUD,ACCEPT_RTADV,AUTO_LINKLOCAL>
ec2-user@freebsd:~/src/gateway-test $ uname -a
FreeBSD freebsd 13.2-STABLE FreeBSD 13.2-STABLE stable/13-n256661-e9ad6b456b02 GENERIC amd64
```
## NetBSD
```
ip-172-31-22-132$ go run test.go
OS: netbsd
Gateway: 172.31.16.1
Iface: 172.31.22.132
ip-172-31-22-132$ netstat -rn
Routing tables
Internet:
Destination Gateway Flags Refs Use Mtu Interface
default 172.31.16.1 UG - - 9001 ena0
127/8 127.0.0.1 UGRS - - 33624 lo0
127.0.0.1 lo0 UHl - - 33624 lo0
172.31.16/20 link#1 UC - - 9001 ena0
172.31.22.132 link#1 UHl - - - lo0
172.31.16.1 06:fd:6a:57:a9:12 UHL - - - ena0
Internet6:
Destination Gateway Flags Refs Use Mtu Interface
::/104 ::1 UGRS - - 33624 lo0
::/96 ::1 UGRS - - 33624 lo0
::1 lo0 UHl - - 33624 lo0
::127.0.0.0/104 ::1 UGRS - - 33624 lo0
::224.0.0.0/100 ::1 UGRS - - 33624 lo0
::255.0.0.0/104 ::1 UGRS - - 33624 lo0
::ffff:0.0.0.0/96 ::1 UGRS - - 33624 lo0
2001:db8::/32 ::1 UGRS - - 33624 lo0
2002::/24 ::1 UGRS - - 33624 lo0
2002:7f00::/24 ::1 UGRS - - 33624 lo0
2002:e000::/20 ::1 UGRS - - 33624 lo0
2002:ff00::/24 ::1 UGRS - - 33624 lo0
fe80::/10 ::1 UGRS - - 33624 lo0
fe80::%ena0/64 link#1 UC - - - ena0
fe80::b38c:bca1:ab84:2e97 link#1 UHl - - - lo0
fe80::%lo0/64 fe80::1 U - - - lo0
fe80::1 lo0 UHl - - - lo0
ff01:1::/32 link#1 UC - - - ena0
ff01:2::/32 ::1 UC - - 33624 lo0
ff02::%ena0/32 link#1 UC - - - ena0
ff02::%lo0/32 ::1 UC - - 33624 lo0
ip-172-31-22-132$ ifconfig
ena0: flags=0x8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
capabilities=0x200<IP4CSUM_Tx>
enabled=0x200<IP4CSUM_Tx>
ec_capabilities=0x4<JUMBO_MTU>
ec_enabled=0
address: 06:74:f1:42:54:23
media: Ethernet autoselect
status: active
inet6 fe80::b38c:bca1:ab84:2e97%ena0/64 flags 0 scopeid 0x1
inet 172.31.22.132/20 broadcast 172.31.31.255 flags 0
lo0: flags=0x8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 33624
status: active
inet6 ::1/128 flags 0x20<NODAD>
inet6 fe80::1%lo0/64 flags 0 scopeid 0x2
inet 127.0.0.1/8 flags 0
ip-172-31-22-132$ uname -a
NetBSD ip-172-31-22-132.eu-west-1.compute.internal 9.99.100 NetBSD 9.99.100 (GENERIC64) #0: Sun Oct 2 23:36:41 UTC 2022 mkrepro@mkrepro.NetBSD.org:/usr/src/sys/arch/evbarm/compile/GENERIC64 evbarm
```
|
