Bone
===

debian@htc-bbb4:~/Data/projects/connman$ cat /etc/dogtag
BeagleBoard.org Debian Image 2016-02-21

debian@htc-bbb4:~/Data/projects/connman$ uname -r
4.1.18-ti-rt-r51

debian@htc-bbb4:~/Data/projects/connman$ ls -l /etc/network
total 24
drwxr-xr-x 2 root root 4096 Feb 21 09:46 if-down.d/
drwxr-xr-x 2 root root 4096 Feb 21 09:46 if-post-down.d/
drwxr-xr-x 2 root root 4096 Feb 21 09:46 if-pre-up.d/
drwxr-xr-x 2 root root 4096 Feb 21 09:47 if-up.d/
drwxr-xr-x 2 root root 4096 Mar 13  2015 interfaces.d/
-rw-r--r-- 1 root root  726 Feb 25 12:03 interfaces.orig
lrwxrwxrwx 1 root root   12 Feb 21 09:46 run -> /run/network/


debian@htc-bbb4:~/Data/projects/connman$ ls -l /etc/dnsmasq.d
total 8
-rw-r--r-- 1 root root 211 May  5  2015 README
-rw-r--r-- 1 root root 772 Mar  7 14:46 usb0-dhcp~


debian@htc-bbb4:~/Data/projects/connman$ systemctl status dnsmasq
● dnsmasq.service - dnsmasq - A lightweight DHCP and caching DNS server
   Loaded: loaded (/lib/systemd/system/dnsmasq.service; disabled)
  Drop-In: /run/systemd/generator/dnsmasq.service.d
           └─50-dnsmasq-$named.conf, 50-insserv.conf-$named.conf
   Active: inactive (dead) since Tue 2016-03-08 10:22:59 PST; 2h 51min ago
  Process: 14587 ExecStop=/etc/init.d/dnsmasq systemd-stop-resolvconf (code=exited, status=0/SUCCESS)
 Main PID: 476 (code=exited, status=0/SUCCESS)

Mar 08 10:22:28 htc-bbb4 dnsmasq[476]: no servers found in /etc/resolv.conf, will retry
Mar 08 10:22:30 htc-bbb4 dnsmasq[476]: reading /etc/resolv.conf
Mar 08 10:22:30 htc-bbb4 dnsmasq[476]: using nameserver 10.78.1.51#53
Mar 08 10:22:30 htc-bbb4 dnsmasq[476]: using nameserver 10.13.0.14#53
Mar 08 10:22:59 htc-bbb4 dnsmasq[476]: exiting on receipt of SIGTERM
Warning: Journal has been rotated since unit was started. Log output is incomplete or unavailable.


## My connman.service (with added CAP_SYS_MODULE):

debian@htc-bbb4:~/Data/projects/connman$ cat /lib/systemd/system/connman.service
[Unit]
Description=Connection service
DefaultDependencies=false
Conflicts=shutdown.target
RequiresMountsFor=/var/lib/connman
After=dbus.service network-pre.target systemd-sysusers.service
Before=network.target multi-user.target shutdown.target
Wants=network.target

[Service]
Type=dbus
BusName=net.connman
Restart=on-failure
ExecStart=/usr/sbin/connmand -n
StandardOutput=null
CapabilityBoundingSet=CAP_KILL CAP_NET_ADMIN CAP_NET_BIND_SERVICE CAP_NET_RAW CAP_SYS_TIME CAP_SYS_MODULE
ProtectHome=true
ProtectSystem=full

[Install]
WantedBy=multi-user.target

## And I added -d to connmand in a drop-in just because I could:

debian@htc-bbb4:~/Data/projects/connman$ cat /etc/systemd/system/connman.service.d/fixups.conf 
[Service]
# Clear out existing.
ExecStart=
# Enable debug output
ExecStart=/usr/sbin/connmand -n -d

# See: https://github.com/systemd/systemd/issues/1221
# Looks like not fixed until after 226
# Add CAP_SYS_MODULE so that LKMs can be loaded on deman.
# Should be able to merge in:
#CapabilitiyBoundingSet=CAP_SYS_MODULE
# This doesn't work either
#CapabilityBoundingSet=CAP_KILL CAP_NET_ADMIN CAP_NET_BIND_SERVICE CAP_NET_RAW CAP_SYS_TIME CAP_SYS_MODULE

## Connman settings

debian@htc-bbb4:~/Data/projects/connman$ sudo cat /var/lib/connman/settings
[global]
OfflineMode=false

[Wired]
Enable=true
Tethering=false

[WiFi]
Enable=true
Tethering=false

[Bluetooth]
Enable=false
Tethering=false

[Gadget]
Enable=true
Tethering=true

[P2P]
Enable=false
Tethering=false


## Journal.

debian@htc-bbb4:~/Data/projects/connman$ journalctl | grep usb0

Mar 08 10:22:24 htc-bbb4 avahi-daemon[330]: Withdrawing address record for 192.168.7.2 on usb0.
Mar 08 10:22:24 htc-bbb4 avahi-daemon[330]: Leaving mDNS multicast group on interface usb0.IPv4 with address 192.168.7.2.
Mar 08 10:22:24 htc-bbb4 avahi-daemon[330]: Interface usb0.IPv4 no longer relevant for mDNS.
Mar 08 10:22:24 htc-bbb4 avahi-daemon[330]: Interface usb0.IPv6 no longer relevant for mDNS.
Mar 08 10:22:24 htc-bbb4 avahi-daemon[330]: Leaving mDNS multicast group on interface usb0.IPv6 with address fe80::d25f:b8ff:fefd:1ed0.
Mar 08 10:22:24 htc-bbb4 avahi-daemon[330]: Withdrawing address record for fe80::d25f:b8ff:fefd:1ed0 on usb0.
Mar 08 10:22:25 htc-bbb4 connmand[370]: Remove interface usb0 [ gadget ]
Mar 08 10:22:25 htc-bbb4 connmand[370]: usb0 {remove} index 3
Mar 08 10:22:26 htc-bbb4 connmand[14283]: usb0 {create} index 3 type 1 <ETHER>
Mar 08 10:22:26 htc-bbb4 connmand[14283]: usb0 {RX} 1 packets 76 bytes
Mar 08 10:22:26 htc-bbb4 connmand[14283]: usb0 {TX} 47 packets 12996 bytes
Mar 08 10:22:26 htc-bbb4 connmand[14283]: usb0 {update} flags 36866 <DOWN>
Mar 08 10:22:26 htc-bbb4 connmand[14283]: usb0 {newlink} index 3 address D0:5F:B8:FD:1E:D0 mtu 1500
Mar 08 10:22:26 htc-bbb4 connmand[14283]: usb0 {newlink} index 3 operstate 2 <DOWN>
Mar 08 10:22:26 htc-bbb4 connmand[14283]: Adding interface usb0 [ gadget ]
Mar 08 10:22:26 htc-bbb4 connmand[14283]: ../plugins/gadget.c:gadget_tech_add_interface() index 3 name usb0 ident d05fb8fd1ed0
Mar 08 10:22:59 htc-bbb4 sudo[14594]: debian : TTY=pts/0 ; PWD=/home/debian/Data/projects/connman ; USER=root ; COMMAND=/bin/mv /etc/dnsmasq.d/usb0-dhcp /etc/dnsmasq.d/usb0-dhcp~
Mar 08 10:23:18 htc-bbb4 connmand[14283]: usb0 {RX} 2 packets 406 bytes
Mar 08 10:23:18 htc-bbb4 connmand[14283]: usb0 {TX} 47 packets 12996 bytes
Mar 08 10:23:18 htc-bbb4 connmand[14283]: usb0 {update} flags 102467 <UP,RUNNING,LOWER_UP>
Mar 08 10:23:18 htc-bbb4 connmand[14283]: usb0 {newlink} index 3 address D0:5F:B8:FD:1E:D0 mtu 1500
Mar 08 10:23:18 htc-bbb4 connmand[14283]: usb0 {newlink} index 3 operstate 6 <UP>
Mar 08 10:23:18 htc-bbb4 connmand[14283]: usb0 {add} route fe80:: gw :: scope 0 <UNIVERSE>
Mar 08 10:23:19 htc-bbb4 avahi-daemon[330]: Joining mDNS multicast group on interface usb0.IPv6 with address fe80::d25f:b8ff:fefd:1ed0.
Mar 08 10:23:19 htc-bbb4 avahi-daemon[330]: New relevant interface usb0.IPv6 for mDNS.
Mar 08 10:23:19 htc-bbb4 avahi-daemon[330]: Registering new address record for fe80::d25f:b8ff:fefd:1ed0 on usb0.*.
Mar 08 10:23:23 htc-bbb4 connmand[14283]: usb0 {RX} 2 packets 406 bytes
Mar 08 10:23:23 htc-bbb4 connmand[14283]: usb0 {TX} 65 packets 18637 bytes
Mar 08 10:23:23 htc-bbb4 connmand[14283]: usb0 {newlink} index 3 address D0:5F:B8:FD:1E:D0 mtu 1500
Mar 08 10:23:23 htc-bbb4 connmand[14283]: usb0 {newlink} index 3 operstate 6 <UP>
Mar 08 10:23:23 htc-bbb4 connmand[14283]: usb0 {RX} 2 packets 406 bytes
Mar 08 10:23:23 htc-bbb4 connmand[14283]: usb0 {TX} 65 packets 18637 bytes
Mar 08 10:23:23 htc-bbb4 connmand[14283]: usb0 {newlink} index 3 address D0:5F:B8:FD:1E:D0 mtu 1500
Mar 08 10:23:23 htc-bbb4 connmand[14283]: usb0 {newlink} index 3 operstate 6 <UP>
Mar 08 10:23:23 htc-bbb4 connmand[14283]: usb0 {newlink} index 3 address D0:5F:B8:FD:1E:D0 mtu 1500
Mar 08 10:23:23 htc-bbb4 connmand[14283]: usb0 {newlink} index 3 operstate 6 <UP>
Mar 08 10:23:23 htc-bbb4 connmand[14283]: usb0 {newlink} index 3 address D0:5F:B8:FD:1E:D0 mtu 1500
Mar 08 10:23:23 htc-bbb4 connmand[14283]: usb0 {newlink} index 3 operstate 6 <UP>
Mar 08 10:23:23 htc-bbb4 connmand[14283]: usb0 {newlink} index 3 address D0:5F:B8:FD:1E:D0 mtu 1500
Mar 08 10:23:23 htc-bbb4 connmand[14283]: usb0 {newlink} index 3 operstate 6 <UP>
Mar 08 10:23:23 htc-bbb4 kernel: device usb0 entered promiscuous mode
Mar 08 10:23:23 htc-bbb4 kernel: tether: port 1(usb0) entered forwarding state
Mar 08 10:23:23 htc-bbb4 kernel: tether: port 1(usb0) entered forwarding state
Mar 08 10:35:05 htc-bbb4 connmand[14283]: usb0 {update} flags 36867 <UP>
Mar 08 10:35:05 htc-bbb4 connmand[14283]: usb0 {newlink} index 3 address D0:5F:B8:FD:1E:D0 mtu 1500
Mar 08 10:35:05 htc-bbb4 connmand[14283]: usb0 {newlink} index 3 operstate 2 <DOWN>
Mar 08 10:35:05 htc-bbb4 connmand[14283]: usb0 {newlink} index 3 address D0:5F:B8:FD:1E:D0 mtu 1500
Mar 08 10:35:05 htc-bbb4 connmand[14283]: usb0 {newlink} index 3 operstate 2 <DOWN>
Mar 08 10:35:05 htc-bbb4 connmand[14283]: usb0 {RX} 2 packets 406 bytes
Mar 08 10:35:05 htc-bbb4 connmand[14283]: usb0 {TX} 114 packets 32324 bytes
Mar 08 10:35:05 htc-bbb4 connmand[14283]: usb0 {newlink} index 3 address D0:5F:B8:FD:1E:D0 mtu 1500
Mar 08 10:35:05 htc-bbb4 connmand[14283]: usb0 {newlink} index 3 operstate 2 <DOWN>
Mar 08 10:35:05 htc-bbb4 kernel: tether: port 1(usb0) entered disabled state
Mar 08 10:35:07 htc-bbb4 kernel: tether: port 1(usb0) entered forwarding state
Mar 08 10:35:07 htc-bbb4 kernel: tether: port 1(usb0) entered forwarding state
Mar 08 10:35:07 htc-bbb4 connmand[14283]: usb0 {update} flags 102467 <UP,RUNNING,LOWER_UP>
Mar 08 10:35:07 htc-bbb4 connmand[14283]: usb0 {newlink} index 3 address D0:5F:B8:FD:1E:D0 mtu 1500
Mar 08 10:35:07 htc-bbb4 connmand[14283]: usb0 {newlink} index 3 operstate 6 <UP>
Mar 08 10:35:07 htc-bbb4 connmand[14283]: usb0 {newlink} index 3 address D0:5F:B8:FD:1E:D0 mtu 1500
Mar 08 10:35:07 htc-bbb4 connmand[14283]: usb0 {newlink} index 3 operstate 6 <UP>
Mar 08 10:35:07 htc-bbb4 connmand[14283]: usb0 {newlink} index 3 address D0:5F:B8:FD:1E:D0 mtu 1500
Mar 08 10:35:07 htc-bbb4 connmand[14283]: usb0 {newlink} index 3 operstate 6 <UP>
Mar 08 10:35:07 htc-bbb4 connmand[14283]: usb0 {RX} 2 packets 406 bytes
Mar 08 10:35:07 htc-bbb4 connmand[14283]: usb0 {TX} 114 packets 32324 bytes
Mar 08 10:35:07 htc-bbb4 connmand[14283]: usb0 {newlink} index 3 address D0:5F:B8:FD:1E:D0 mtu 1500
Mar 08 10:35:07 htc-bbb4 connmand[14283]: usb0 {newlink} index 3 operstate 6 <UP>

### Network Note tether with 192.168.0.1/24 network
debian@htc-bbb4:~/Data/projects/connman$ ip a
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: eth0: <BROADCAST,MULTICAST,DYNAMIC,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether d0:5f:b8:fd:1e:d4 brd ff:ff:ff:ff:ff:ff
    inet 10.78.3.193/24 brd 10.78.3.255 scope global eth0
       valid_lft forever preferred_lft forever
    inet6 fe80::d25f:b8ff:fefd:1ed4/64 scope link 
       valid_lft forever preferred_lft forever
3: usb0: <BROADCAST,MULTICAST,DYNAMIC,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master tether state UP group default qlen 1000
    link/ether d0:5f:b8:fd:1e:d0 brd ff:ff:ff:ff:ff:ff
    inet6 fe80::d25f:b8ff:fefd:1ed0/64 scope link 
       valid_lft forever preferred_lft forever
4: can0: <NOARP,ECHO> mtu 16 qdisc noop state DOWN group default qlen 10
    link/can 
5: can1: <NOARP,ECHO> mtu 16 qdisc noop state DOWN group default qlen 10
    link/can 
6: tether: <BROADCAST,MULTICAST,DYNAMIC,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default 
    link/ether d0:5f:b8:fd:1e:d0 brd ff:ff:ff:ff:ff:ff
    inet 192.168.0.1/24 brd 192.168.0.255 scope global tether
       valid_lft forever preferred_lft forever
    inet6 fe80::7866:94ff:fef5:db59/64 scope link 
       valid_lft forever preferred_lft forever
debian@htc-bbb4:~/Data/projects/connman$ sudo bridge link show
3: usb0 state UP : <BROADCAST,MULTICAST,DYNAMIC,UP,LOWER_UP> mtu 1500 master tether state forwarding priority 32 cost 100 
debian@htc-bbb4:~/Data/projects/connman$

Laptop (Linux Mint)
===

brian_anderson@htc-thinkpad1 ~ $ ip a
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: eth0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN group default qlen 1000
    link/ether 54:ee:75:31:34:94 brd ff:ff:ff:ff:ff:ff
    inet6 fe80::56ee:75ff:fe31:3494/64 scope link 
       valid_lft forever preferred_lft forever
4: wlan0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN group default qlen 1000
    link/ether e8:b1:fc:46:1d:ba brd ff:ff:ff:ff:ff:ff
    inet6 fe80::eab1:fcff:fe46:1dba/64 scope link 
       valid_lft forever preferred_lft forever
39: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN group default qlen 1000
    link/ether d0:5f:b8:fd:1e:d6 brd ff:ff:ff:ff:ff:ff
    inet 192.168.0.2/24 brd 192.168.0.255 scope global eth1
       valid_lft forever preferred_lft forever
    inet6 fe80::d25f:b8ff:fefd:1ed6/64 scope link 
       valid_lft forever preferred_lft forever