[wireguard-android] 'roaming' from LTE to WiFi with version 0.0.20180523

[nnet]

> It would appear that T-Mobile is using 464XLAT ...

Yes, from what I've seen and read.

> ...  and Android runs
> https://github.com/toreanderson/clatd
...
> Can you confirm this suspicion by sending the output of `ip addr show`
> and `ps|grep clat`?

Below follows. Although DHCP is giving IPv4 only on WiFi there is a link local IPv6 address.

$ ps|grep clat
1
$ ip addr show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: dummy0: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN group default
    link/ether snipmac brd ff:ff:ff:ff:ff:ff
    inet6 snipinet6 scope link
       valid_lft forever preferred_lft forever
3: sit0: <NOARP> mtu 1480 qdisc noop state DOWN group default
    link/sit 0.0.0.0 brd 0.0.0.0
4: rmnet_ipa0: <UP,LOWER_UP> mtu 2000 qdisc pfifo_fast state UNKNOWN group default qlen 1000
    link/[530]
5: rmnet_data0: <> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/[530]
6: rmnet_data1: <> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/[530]
7: rmnet_data2: <> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/[530]
8: rmnet_data3: <> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/[530]
9: rmnet_data4: <> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/[530]
10: rmnet_data5: <> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/[530]
11: rmnet_data6: <> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/[530]
12: rmnet_data7: <UP,LOWER_UP> mtu 1500 qdisc htb state UNKNOWN group default qlen 1000
    link/[530] 
    inet6 snipinet6/64 scope global dynamic                             
       valid_lft forever preferred_lft forever
    inet6 snipinet6/64 scope link               
       valid_lft forever preferred_lft forever
13: r_rmnet_data0: <UP,LOWER_UP> mtu 3000 qdisc pfifo_fast state UNKNOWN group default qlen 1000
    link/[530] 
    inet6 snipinet6/64 scope link               
       valid_lft forever preferred_lft forever
14: r_rmnet_data1: <> mtu 3000 qdisc noop state DOWN group default qlen 1000
    link/[530]
15: r_rmnet_data2: <> mtu 3000 qdisc noop state DOWN group default qlen 1000
    link/[530]
16: r_rmnet_data3: <> mtu 3000 qdisc noop state DOWN group default qlen 1000
    link/[530]
17: r_rmnet_data4: <> mtu 3000 qdisc noop state DOWN group default qlen 1000
    link/[530]
18: r_rmnet_data5: <> mtu 3000 qdisc noop state DOWN group default qlen 1000
    link/[530]
19: r_rmnet_data6: <> mtu 3000 qdisc noop state DOWN group default qlen 1000
    link/[530]
20: r_rmnet_data7: <> mtu 3000 qdisc noop state DOWN group default qlen 1000
    link/[530]
21: r_rmnet_data8: <> mtu 3000 qdisc noop state DOWN group default qlen 1000
    link/[530]
25: tun0: <POINTOPOINT,UP,LOWER_UP> mtu 1280 qdisc pfifo_fast state UNKNOWN group default qlen 500
    link/none
    inet snipinet/32 scope global tun0
       valid_lft forever preferred_lft forever
32: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 3000
    link/ether snipmac brd ff:ff:ff:ff:ff:ff
    inet snipinet/24 brd snipinet scope global wlan0
       valid_lft forever preferred_lft forever
    inet6 snipinet6/64 scope link
       valid_lft forever preferred_lft forever
33: p2p0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN group default qlen 3000
    link/ether snipmac brd ff:ff:ff:ff:ff:ff


On Thu, May 24, 2018, at 8:04 AM, Jason A. Donenfeld wrote:
> It would appear that T-Mobile is using 464XLAT and Android runs
> https://github.com/toreanderson/clatd
> 
> Can you confirm this suspicion by sending the output of `ip addr show`
> and `ps|grep clat`?
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