> On 18 May 2015, at 4:44 , Sven Van Caekenberghe <s...@stfx.eu> wrote:
>
>
>> On 18 May 2015, at 16:34, Manfred Kröhnert <mkroehner...@googlemail.com>
>> wrote:
>>
>> Hi Sven,
>>
>> On Mon, May 18, 2015 at 4:14 PM, Sven Van Caekenberghe <s...@stfx.eu> wrote:
>>
>>> On 18 May 2015, at 15:47, Manfred Kröhnert <mkroehner...@googlemail.com>
>>> wrote:
>>>
>>> Hi,
>>> apparently I am missing something else.
>>>
>>> I can find devices when connected to a 'regular' LAN.
>>>
>>> However, I have a camera that creates a Wifi accesspoint and makes itself
>>> discoverable via SSDP.
>>> Once I connect to this accesspoint my computer gets a valid IP address
>>> assigned and the NodeJS code is able to discover the device.
>>> Unfortunately, the Pharo snippet I posted before does not give me any
>>> results and hangs in Socket>>waitForDataIfClosed: .
>>>
>>> Any further ideas?
>>
>> Are you sure you restarted the image and your code after switching networks ?
>>
>> I did not check this before.
>> But I just downloaded a fresh 40613 image with PharoLauncher and started it
>> after connecting to the camera accesspoint.
>> The code snippet freezes there as well.
>>
>> Manfred
The socket API is a bit confusing, since it mixes together the API's that match
the primitives for sending/receiving TCP/UDP.
To receive UDP data on the socket, you need something like:
| message udpSocket host buffer read|
message := (String crlf join: #('M-SEARCH * HTTP/1.1'
'HOST:239.255.255.250:1900'
'MAN:"ssdp:discover"'
'ST:ssdp:all'
'MX:1')).
udpSocket := Socket newUDP.
host := (NetNameResolver addressFromString: '239.255.255.250').
udpSocket sendData: message toHost: host port: 1900.
buffer := String new:4096.
"MX:1 means we expect replies within 1 second, let's be on the safe side and
wait 2"
2 seconds wait.
read := 1.
[read > 0] whileTrue: [
read := (udpSocket receiveUDPDataInto: buffer) first.
Transcript show: (buffer copyFrom:1 to:read)]
Cheers,
Henry
