diff options
Diffstat (limited to 'docs/ANDROID-QEMUD.TXT')
| -rw-r--r-- | docs/ANDROID-QEMUD.TXT | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/docs/ANDROID-QEMUD.TXT b/docs/ANDROID-QEMUD.TXT index 6415a47..1364553 100644 --- a/docs/ANDROID-QEMUD.TXT +++ b/docs/ANDROID-QEMUD.TXT @@ -92,7 +92,7 @@ Since the "cupcake" platform, this works as follows: connect:<service>:<id> - where <service> is the service name, and <id> is a 4-hexchar string + where <service> is the service name, and <id> is a 2-hexchar string giving the allocated channel index for the client. @@ -181,9 +181,19 @@ This is documented here since this explains some subtleties in the implementation code of android/hw-qemud.c The old scheme also used a serial port to allow the daemon and the emulator -to communicate. Besides, the same multiplexing protocol was used to pass -messages through multiple channels. However, several other differences -exist, best illustrated by the following graphics: +to communicate. However, the multiplexing protocol swaps the position of +'channel' and 'length' in the header: + + offset size description + + 0 4 4-char hex string giving the payload size + + 4 2 2-char hex string giving the destination or + source channel + + 6 n the message payload + +Several other differences, best illustrated by the following graphics: emulator <==serial==> qemud <-+--> /dev/socket/qemud_gsm <--> GSM client | |