Just a little more data... after using arp on the host side and ip on the android side to manually add entries, the Destination Host Unreachable errors went away but still no ping response. I ran Wireshark on the host and the messages from the device are not correct. The displayed mac addresses do not look right and the protocol is unknown so just displayed as 0x7aab. After looking at the actual data in the message it appears that there are two zero bytes prepended to the message. If those were removed it looks like everything would line up and work. Has anyone ever seen this or know where in the code this can be fixed ?
On Mar 13, 10:27 am, bobbark <hey.its.a.g...@gmail.com> wrote: > I am trying to get Ethernet over USB working for my Nexus S. I am > running Ice Cream Sandwich v4.0.3 and have rebuilt the kernel with USB > Gadget support turned on. When I connect the phone to my Linux box and > run ifconfig -a, usb0 shows up both on the phone and the Linux box. I > run ifconfig to set both sides up and everything looks correct but I > cannot ping from either side: > > PING 192.168.22.2 (192.168.22.2) 56(84) bytes of data. > From 192.168.22.1 icmp_seq=1 Destination Host Unreachable > From 192.168.22.1 icmp_seq=2 Destination Host Unreachable > > I also have a N900 running Maemo Linux that does allow Ethernet over > USB. I compared output of ethtool, ifconfig, route, and arp between > the N900 and the Nexus S and all are very similar except the arp > output. It shows (incomplete) for the HWaddress for the Android > connection: > > Address HWtype HWaddress Flags > Mask Iface > 10.1.3.1 ether 00:1B:17:05:30:13 > C eth0 > 192.168.22.2 > (incomplete) usb0 > > "ip neigh show" results in: > > 10.1.3.99 dev eth0 lladdr b8:ac:6f:30:6f:ba REACHABLE > 192.168.22.2 dev usb0 INCOMPLETE > > on the first call and: > > 10.1.3.99 dev eth0 lladdr b8:ac:6f:30:6f:ba REACHABLE > 192.168.22.2 dev usb0 FAILED > > on the second call. > > The only other clue I have is that ifconfig shows on the Linux side: > > usb0 Link encap:Ethernet HWaddr 66:E4:64:10:D1:A9 > inet addr:192.168.22.1 Bcast:192.168.22.255 Mask:255.255.255.0 > inet6 addr: fe80::64e4:64ff:fe10:d1a9/64 Scope:Link > UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 > RX packets:0 errors:0 dropped:0 overruns:0 frame:0 > TX packets:42 errors:0 dropped:0 overruns:0 carrier:0 > collisions:0 txqueuelen:1000 > RX bytes:0 (0.0 b) TX bytes:9039 (8.8 KiB) > and on the Android side: > > usb0 Link encap:Ethernet HWaddr 7A:78:28:52:9C:A0 > inet addr:192.168.22.2 Bcast:192.168.22.255 Mask:255.255.255.0 > inet6 addr: fe80::7878:28ff:fe52:9ca0/64 Scope:Link > UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 > RX packets:202 errors:0 dropped:202 overruns:0 frame:0 > TX packets:36 errors:0 dropped:0 overruns:0 carrier:0 > collisions:0 txqueuelen:1000 > RX bytes:47294 (46.1 KiB) TX bytes:1728 (1.6 KiB) > Notice the dropped packets on the Android side. > > It seems like I am almost there.. any suggestions? -- unsubscribe: android-kernel+unsubscr...@googlegroups.com website: http://groups.google.com/group/android-kernel
