tree 54c80021860dd0dad6e4dd99524fda513be4a08e
parent 3c15fe47b52d14e1612f463fee835265cbef1900
author Peter Maydell <peter.maydell@linaro.org> 1410911941 +0100
committer Alex Bennée <alex.bennee@linaro.org> 1418992176 +0000

android_adb: add Android ADB backend

The Android adbd daemon running inside Android VMs on the emulator
expect to be able to talk to a backend named "qemud:adb" (for historical
reasons).

The backend will carry out a handshake:
 1. Listen for connections from the host adb server on
    adb_port = <5555 + (2 * emulator instance id)>.
 2. Connect to the local adb server on port 5037 if it's available.
 3. Listen for and accept the beginning of the handshake with the adbd
    daemon (adbd sends 'accept' over the write).
 4. After the adb backend detects a connection on <adb_port>, it sends
    back an "ok" string to adbd.
 5. The adb backend will not send any more data over the pipe until it
    recognizes a 'start' request, which means the adbd is ready to
    receive data from the host ADB server.

Once the above process is complete, the adb backend will consume
everything it receives on the socket connected on <adb_port> and send it
over the adb pipe and will consume everything it receives over the adb
pipe and send it on the socket connected on <adb_port>.

Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
[AJB: Bunch of clean-up/re-factoring to GIOChannel code]
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
[PMM: Listen for ADB connections on 127.0.0.1, not localhost]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>