6 Jul
2016
6 Jul
'16
1:38 a.m.
Hi,
In pythonosc (https://pypi.python.org/pypi/python-osc) after
connecting with udp_client.UDPClient(...) from a "client", how can I
detect the IP to respond to in the "server"?
If I explicitly supply the return IP in the server's
udp_client.UDPClient(...) call it works. But I want the server to
listen for an incoming connection or call on a particular port and
figure out who sent it and reply to that IP.
I have no network-fu.
Thanx!
--
@ubuntourist
6 Jul
6 Jul
8:59 a.m.
New subject: python-osc udp_client.UDPClient() - How do I figure out the reply-to IP?
Am 06.07.2016 um 01:38 schrieb Kevin Cole:
In pythonosc (https://pypi.python.org/pypi/python-osc)
after
connecting with udp_client.UDPClient(...) from a "client", how can I
detect the IP to respond to in the "server"?
Normally, with UDP servers, you'd use socket.recvfrom() to read the data
from the client and get its address.
https://docs.python.org/3/library/socket.html#socket.socket.recvfrom
But it doesn't seem like pythonosc supplies the client's address to the
dispatcher.
But I want the server to
listen for an incoming connection or call on a particular port and
figure out who sent it and reply to that IP.
It's not uncommon for OSC software, that you have to specify client (a)
address(es) in the server as well, since OSC, commonly using UDP as a
transport, is only uni-directional, so to get bi-directional
communication, every participant in an OSC communication has to be a
server and a client.
If you don't need a pure-Python library, I'd look at python-liblo.
Chris
9:01 a.m.
New subject: python-osc udp_client.UDPClient() - How do I figure out the reply-to IP?
Am 06.07.2016 um 08:59 schrieb Christopher Arndt:
It's not uncommon for OSC software, that you have
to specify client (a)
address(es) in the server as well, since OSC, commonly using UDP as a
transport, is only uni-directional, so to get bi-directional
communication, every participant in an OSC communication has to be a
server and a client.
I forgot: if you only have clients in the local network, you could also
just send packets to the broadcast address (use ifconfig to look it up).
Chris
3:28 p.m.
New subject: python-osc udp_client.UDPClient() - How do I figure out the reply-to IP?
On Wed, Jul 6, 2016 at 3:01 AM, Christopher Arndt <chris(a)chrisarndt.de> wrote:
I forgot: if you only have clients in the local
network, you could also just
send packets to the broadcast address (use ifconfig to look it up).
Oooo. This seems simplest of all. "Me likey!" ;-)
3:26 p.m.
New subject: python-osc udp_client.UDPClient() - How do I figure out the reply-to IP?
The responses from everyone are improving my understanding... I think.
Thanks all.
On Wed, Jul 6, 2016 at 2:59 AM, Christopher Arndt <chris(a)chrisarndt.de> wrote:
It's not uncommon for OSC software, that you have
to specify client (a)
address(es) in the server as well, since OSC, commonly using UDP as a
transport, is only uni-directional, so to get bi-directional communication,
every participant in an OSC communication has to be a server and a client.
This part, if I understand you correctly, I'm already doing. I'm
creating a poor emulator of the Symbolic Sound Paca DSP's OSC. The
idea is to send Paca-specific OSC messages to the emulator, and
receive Paca-specific OSC responses.
I have very limited access to the Paca and want to be able to continue
development when away from the machine. Paca, in addition to OSC,
speaks Bonjour / Zeroconf / Avahi. I've set up a Raspberry Pi with a
known hostname and registered a Zeroconf service. In my test code, I
query the network for the OSC zeroconf service, explicitly specifying
the permanent zeroconf name of the Pi, just as I do with the actual
Paca. That works.
But the real, physical Paca figures out who called to it and responds
to the caller. The caller has to use the fixed, permanent zeroconf
address of the Paca, but the Paca does not have a hardwired address
for who to respond to.
5:30 p.m.
New subject: python-osc udp_client.UDPClient() - How do I figure out the reply-to IP?
On Wed, 6 Jul 2016, Christopher Arndt wrote:
Am 06.07.2016 um 01:38 schrieb Kevin Cole:
In liblo, the client's address (url form includes protocol,ip,port) is a
part of the received message which is very handy. That does not seem to be
the case here. I also see that, at least in the examples, the word address
is used for the OSC path which is even more confusing.
However, looking at
https://github.com/attwad/python-osc/blob/master/pythonosc/osc_server.py
There is a class OSCUDPServer and it includes a call verify_request() with
one of the parameters being client_address. Maybe drop a print command
into that call that prints out whatever client_address is stored as. This
will tell you if you have the information you need at that point. (IP and
port) If so you may be able to expand the handlers by adding this
parameter to the calls you need so that this address is exposed or you may
be able to use this parameter (or structure) directly.
Anyway, the info is there. and it does seem to get passed to some
places...
this bit in the same file as above: (line 168)
def datagram_received(self, data, unused_addr):
seems to indicate someone has thought the address should be used for
something but that is is not at this time. I think expanding this python
library would be the easiest route. (then push that expansion back for
inclusion for others to use)
Now I know why I don't use python... I find it quite difficult to follow.
--
Len Ovens
www.ovenwerks.net
In pythonosc
(https://pypi.python.org/pypi/python-osc) after
connecting with udp_client.UDPClient(...) from a "client", how can I
detect the IP to respond to in the "server"?
Normally, with UDP servers, you'd use socket.recvfrom() to read the data from
the client and get its address. 
12:37 p.m.
New subject: python-osc udp_client.UDPClient() - How do I figure out the reply-to IP?
Il 06/07/2016 01:38, Kevin Cole ha scritto:
Hi,
In pythonosc (https://pypi.python.org/pypi/python-osc) after
connecting with udp_client.UDPClient(...) from a "client", how can I
detect the IP to respond to in the "server"?
If I explicitly supply the return IP in the server's
udp_client.UDPClient(...) call it works. But I want the server to
listen for an incoming connection or call on a particular port and
figure out who sent it and reply to that IP.
I have no network-fu.
Thanx!
--
@ubuntourist
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Linux-audio-dev(a)lists.linuxaudio.org
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Hi,
Looking at python-os "osc-server.py" code, I've noticed that the client
address (IP, Port) is left, when dispatching UDP request,
you can either use a custom version (like this
<http://pastebin.com/g7WBmHya>), were the callbacks receive the request
address (in the example, as second argument),
or if you can freely decide what to send to the server, the clients can
send their address into the requests, like this:
msg = osc_message_builder.OscMessageBuilder(address="/MyAddress")
msg.add_arg("Value")
msg.add_arg("IP_ADDRESS") # replace with the client address using for
example " socket.gethostname()"
msg = msg.build()
client.send(msg)
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6 comments
4 participants
participants (4)
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Christopher Arndt -
Francesco Ceruti -
Kevin Cole -
Len Ovens