Is there any way to use the socket port lower than 1024 (eg. 223) in Android platform

by » Sun, 15 Mar 2009 13:13:54 GMT

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 Is there any way to use the socket port lower than 1024 with class
MulticastSocket? My application has to use this port to receive data
from other official tool which I can not change.  But happend when I new a MulticastSocket instance.
I've added INTERNET permission and I can create the socket if I change
it to other port bigger than 1023.

Source code : sock = New MulticastSocket(223)

I/System.out(  279): SocketException happend
W/System.err(  279): Permissions do not allow
action on socket
W/System.err(  279):    at
(Native Method)
W/System.err(  279):    at
W/System.err(  279):    at
W/System.err(  279):    at
W/System.err(  279):    at<init>
W/System.err(  279):    at<init>
W/System.err(  279):    at
W/System.err(  279):    at
W/System.err(  279):    at
W/System.err(  279):    at
W/System.err(  279):    at$1800
W/System.err(  279):    at$H.handleMessage
W/System.err(  279):    at android.os.Handler.dispatchMessage
W/System.err(  279):    at android.os.Looper.loop(
W/System.err(  279):    at
W/System.err(  279):    at java.lang.reflect.Method.invokeNative
(Native Method)
W/System.err(  279):    at java.lang.reflect.Method.invoke(
W/System.err(  279):    at
W/System.err(  279):    at
W/System.err(  279):    at dalvik.system.NativeStart.main(Native


Other Threads

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the /dev/eac device node is supported by the emulator-specific kernel code
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it is used to send/receive sound samples by reading/writing various i/o
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this is emulated/supported by the emulator source file "goldfish_audio.c",

which itselfs uses the QEMU audio sound-system (located in
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external/qemu/audio contains several "audio backends" that communicate with
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coreaudio.c  for OS X
windaudio.c for Win32
esdaudio.c for EsounD on Linux
alsaaudio.c for ALSA on Linux

so what happens when generating sound output is:

AudioFlinger -> /dev/eac -> kernel (mach-goldfish/audio.c) -> emulator
(external/qemu/goldfish_audio.c -> QEMU audio sub-system -> system-specific
audio  backend) -> system sound API

Hope this helps


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