ipheth device and iPhone tetheting

[Daniel Morandini]

Hi folks,
Obtaining an Internet access from an iOS device connected via USB is currently quite a pain.

The flow is supposed to be something like:
	1. load the ipheth module
	2. plug in the iOS device with tethering enabled
	3. a new ueN interface is created
	4. dhclient ueN
and you should have a new gateway. At least this is what I expect, which is similar to what happens when connecting an Android device with tethering enabled, the only difference being you have to use the urndis module.

After step 3 instead the ipheth module is not capable of creating the interface, and you have to actually configure the device manually as explained in the ipheth(4) BUG note, using `usbconfig -d <unit>.<addr> 2 set_config 3`.

This triggers an authentication request on the iPhone, and after that the interface is eventually created, but the dhclient is not able to obtain a lease with it, "No DHCPOFFERS received”.

Digging around the web you’ll eventually find this guide [1] which, even though it is quite old (10 yrs now), points to the right direction: usbmuxd and libimobiledevice.

The usbmuxd is available as a port now, under comms/usbmuxd (not maintained though). Install, run the daemon, plug the phone again and you’ll get your interface. This time dhclient is able to obtain a lease, but you’ll not get internet out of that (at least, I’m not):

```
# 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>
ue0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
        options=80009<RXCSUM,VLAN_MTU,LINKSTATE>
        ether b8:27:eb:ed:a1:c9
        media: Ethernet autoselect (none)
        status: no carrier
        nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
ue1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
        ether 7e:a1:ae:6a:11:1d
        inet 0.0.0.0 netmask 0xff000000 broadcast 255.255.255.255
        nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
```

```
# netstat -rn
Routing tables

Internet:
Destination        Gateway            Flags     Netif Expire
0.0.0.0/8          link#3             U           ue1
127.0.0.1          link#1             UH          lo0

Internet6:
Destination                       Gateway                       Flags     Netif Expire
::/96                             ::1                           UGRS        lo0
::1                               link#1                        UH          lo0
::ffff:0.0.0.0/96                 ::1                           UGRS        lo0
fe80::/10                         ::1                           UGRS        lo0
fe80::%lo0/64                     link#1                        U           lo0
fe80::1%lo0                       link#1                        UHS         lo0
ff02::/16                         ::1                           UGRS        lo0
```

```
# uname -a
FreeBSD generic 12.1-RELEASE FreeBSD 12.1-RELEASE r354233 GENERIC  arm
```

Long story short: do we want to work on this issue? I’m available for helping, but I need some guidance.

Greetings,
Daniel

[1] https://forums.freebsd.org/threads/howto-iphone-internet-connection-sharing-via-usb.19995/