[erlang-questions] udp multicast: problem with OSX?

[Gokhan Boranalp]

Maybe you could bump to El Capitan SIP
http://www.macworld.com/article/2986118/security/how-to-modify-system-integrity-protection-in-el-capitan.html
I don't know if it covers UDP too.


On Thu, Apr 7, 2016 at 5:39 PM, Rad Gruchalski <radek@REDACTED> wrote:

> Hi Peter,
>
> Multicast works absolutely fine on OSX. Here is how multicast is enabled:
>
> https://github.com/gossiperl/gossiperl/wiki/multicast-overlays#setting-up-multicast-on-os-x
>
> And then using the multicast options:
>
> https://github.com/gossiperl/gossiperl/blob/master/include/gossiperl.hrl#L107
>
> Works perfect on Linux, OSX and RPi.
>
> Best regards,
> Radek Gruchalski
> radek@REDACTED <radek@REDACTED>
> de.linkedin.com/in/radgruchalski/
>
>
> *Confidentiality:*This communication is intended for the above-named
> person and may be confidential and/or legally privileged.
> If it has come to you in error you must take no action based on it, nor
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>
> On Thursday, 7 April 2016 at 16:14, Peter Morgan wrote:
>
> Hello -
>
> I’m having some trouble getting UDP multicast working on OSX, whereas the
> same code on Linux works fine.
>
> On linux (fedora 23):
>
> [pmorgan@REDACTED ~]$ erl
> Erlang/OTP 18 [erts-7.3] [source] [64-bit] [async-threads:10] [hipe]
> [kernel-poll:false]
>
> Eshell V7.3 (abort with ^G)
> 1> Address = {224, 0, 0, 251}.
> {224,0,0,251}
> 2> Port = 5353.
> 5353
> 3> {ok, Socket} = gen_udp:open(Port, [binary, {ip, Address},
> {add_membership, {Address, {0,0,0,0}}}, {reuseaddr, true}]).
> {ok,#Port<0.543>}
> 4> gen_udp:send(Socket, Address, Port, <<"hello world">>).
> ok
>
>
> Whereas on OSX:
>
> Office-iMac:mdns pmorgan$ sw_vers
> ProductName: Mac OS X
> ProductVersion: 10.11.4
> BuildVersion: 15E61b
>
> Office-iMac:mdns pmorgan$ erl
> Erlang/OTP 18 [erts-7.3] [source] [64-bit] [smp:4:4] [async-threads:10]
> [hipe] [kernel-poll:false] [dtrace]
>
> Eshell V7.3 (abort with ^G)
> 1> Address = {224, 0, 0, 251}.
> {224,0,0,251}
> 2> Port = 5353.
> 5353
> 3> {ok, Socket} = gen_udp:open(Port, [binary, {ip, Address},
> {add_membership, {Address, {0,0,0,0}}}, {reuseaddr, true}]).
> {ok,#Port<0.553>}
> 4> gen_udp:send(Socket, Address, Port, <<"hello world">>).
> {error,eaddrnotavail}
>
>
> I’ve tried various other options in gen_udp:open/2, but not found a
> combination that works for OSX. Any ideas please? The above is a simplified
> test case of
> https://github.com/shortishly/mdns/blob/master/src/mdns_udp.erl#L41-L49
>
> Thanks,
> Peter.
>
>
>
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-- 
BR,
\|/ Kunthar
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