Hi, I'm replying to both mails in one:
I wanted to check if there are any new methods to get one's own ip
from Pd
Are you talking about the local IP address or your public IP address?
I'm trying first to implement this on local networks, so the first. But
I would like later to also do this for any network connection, where the
second will be necessary (I know this only from websites such as
whatismyip).
I read somewhere that 255.255.255.255 was also for broadcast, but
since it's not working I imagine I read wrong.
255.255.255.255 is indeed the broadcast address. What is not working?
Which Pd version? Which network objects? Broadcast works just fine for
me with [netsend -u] in Pd 0.51 on Windows 7.
Note that broadcast/multicast can only be used for local networks.
Also, for p2p communication over the internet you need
https://en.wikipedia.org/wiki/UDP_hole_punching.
I'll have a closer look, this is new to me. I did made performances with
data transfer in pd (and max) in the internet some years ago, but
haven't done this often or sistematically in a while.
Depends on the kind of subnet. If your netmask is 255.255.255.0, then
yes. But networks can be of any size and depending on the size, the
broadcast address of that network might be a different one. The IP-
Address in a local network is divided in a network-prefix and host
part. You see often addresses specified in CIDR notation, for example:
192.168.50.244/24. The '24' means that the first 24 bits of the address
are the network prefix, and the remaining 8 bits is the host part. For
getting the broadcast address of a given subnet, you set all bits of
the host part to 1, which results in x.x.x.255 for a /24 network.
I think I would try to keep it safe and use ipv4 for now.
And final question: besides netpd, are there any known public patches
where users from several networks can connect to and send/receive data?
Are talking about local networks or the internet?
First local, but later also internet.
Shameless plug: The next (pre)release of "aoo" will allow sending
arbitrary OSC messages over the internet. It has methods for sending
messages to individual peers and also "broadcast" messages to all
connected peers. Hopefully I manage to release it soon... It's way
overdue :-/
That is interesting. But unfortunately I'll also need to use this on
mobiles, so I'm trying for a vanilla solution.
I've done some tests the last days, and here some more concrete
information to who might be interested:
- I'm adding networking to my Click Tracker patch
(http://j.mp/click-tracker), and since it will be used by musicians who
don't even know what Pd is, it would be comfortable to avoid them search
for computer details when on a local network.
- there isn't much data to be sent: loading the scores (a text file) to
all users, and then basically a play/stop switch, velocity, etc.
- The purpose is to work on all OSs and android (the app version is
based on mobmuplat)
- I've done tests on my local network using 2 computers (W10, Pd 0.51.4,
wireless) and an android phone with mobmuplat. Sending from
[oscformat]->[netsend -u -b] to [netreceive -u -b]->[oscparse]. The
results are:
- both 255.255.255.255 and 192.168.178.255 work fine in all directions
- so does communicating with direct IPs (if I end up implementing
this outside of local networks, I'll need to use this and prepare a
system to manage users)
- 255.255.255.0 doesn't work, although that's my subnetmask. Pd's
console shows the error "a socket operation related to an unavailable
network" (translated loosely from German)
- strangely, one of the computers receives all messages 2x. Both when
it's connected to wireless+lan, or also when only one of these.
- the phone can send lists such as "list /test", but floats (as both
float or "/list $1") aren't sent. This isn't a problem when sending from
the computers.
Any other suggestions/experiences regarding this context?
Best,
jmmmp
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