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Address does not pick the default interface
This may be considered an enhancement on linux and osx, but a bug on windows.
On windows, address.ip returns the address of my docker interface instead of my default interface (which is a wifi interface).
I would like to suggest that it should, on all platforms, prefer the interface which has the default route, as that is the default interface.
On windows, route print provides the details -- the interface, it's mac address, name, and ip address.
PS D:\src\rinble\graphql> route print 0.0.0.0
===========================================================================
Interface List
23...10 bf 48 7e 46 13 ......Intel(R) 82579V Gigabit Network Connection
25...00 15 5d bd b6 0a ......Hyper-V Virtual Ethernet Adapter #2
9...16 db c9 ac 4f d5 ......Microsoft Wi-Fi Direct Virtual Adapter
18...26 db c9 ac 4f d5 ......Microsoft Wi-Fi Direct Virtual Adapter #2
13...94 db c9 ac 4f d5 ......Qualcomm Atheros AR9485 Wireless Network Adapter
1...........................Software Loopback Interface 1
26...00 15 5d 26 19 31 ......Hyper-V Virtual Ethernet Adapter
===========================================================================
IPv4 Route Table
===========================================================================
Active Routes:
Network Destination Netmask Gateway Interface Metric
0.0.0.0 0.0.0.0 192.168.0.1 192.168.0.102 55
===========================================================================
Persistent Routes:
None
IPv6 Route Table
===========================================================================
Active Routes:
None
Persistent Routes:
None
It will always be the interface address listed by route print 0.0.0.0 on Windows.
On mac, I get it in two commands:
Richards-MacBook-Pro:hashbang rich$ route get default
route to: default
destination: default
mask: default
gateway: 192.168.0.1
interface: en0
flags: <UP,GATEWAY,DONE,STATIC,PRCLONING>
recvpipe sendpipe ssthresh rtt,msec rttvar hopcount mtu expire
0 0 0 0 0 0 1500 0
Richards-MacBook-Pro:hashbang rich$ ifconfig en0
en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
options=400<CHANNEL_IO>
ether 54:26:96:d1:41:61
inet6 fe80::1462:e5a1:8960:3de6%en0 prefixlen 64 secured scopeid 0x4
inet 192.168.0.158 netmask 0xffffff00 broadcast 192.168.0.255
inet6 2605:8d80:6a0:2f8a:18a8:955c:84bc:a4c4 prefixlen 64 autoconf secured
inet6 2605:8d80:6a0:2f8a:f5ce:efbd:ece5:c804 prefixlen 64 autoconf temporary
nd6 options=201<PERFORMNUD,DAD>
media: autoselect
status: active
On linux:
/ # route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
default 172.17.0.1 0.0.0.0 UG 0 0 0 eth0
172.17.0.0 * 255.255.0.0 U 0 0 0 eth0
/ # ifconfig eth0
eth0 Link encap:Ethernet HWaddr 02:42:AC:11:00:02
inet addr:172.17.0.2 Bcast:172.17.255.255 Mask:255.255.0.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:19 errors:0 dropped:0 overruns:0 frame:0
TX packets:3 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:1463 (1.4 KiB) TX bytes:167 (167.0 B)
I was able to correctly get the address of the primary interface using your module like this:
const defaultGateway = require('default-gateway');
const gw = defaultGateway.v4.sync();
const address = require('address');
const ip = address.ip(gw.interface);
This should be cross platform. Not sure if I'll have time to adjust and make a pull request, but that would handle it.