problem with new socket module setopt()

[Mark Geib]

Adding socket:setopt(Socket, otp, debug, true) did not seem to have any effect. I captured a snippet from the log below which may help.

2021-01-28T09:08:04.897919-08:00 [error] Supervisor: {local,ptc_6254_A_transport_sup}. Context: start_error. Reason: {badarg,[{prim_socket,nif_setopt,[#Ref<0.2135233317.2669019137.87142>,true,303,3002,#{interface => {172,24,4,30},multiaddr => {239,33,62,54},sourceaddr => {172,24,93,7}}],[]},{cse_socket,open_ssm_mc,
4,[{file,"/home/geib/git/cse.mpeg.invidi.pts_delta/apps/ipd/src/cse_socket.erl"},{line,87}]},{mpeg_ingest_rtp,init,1,[{file,"/home/geib/git/cse.mpeg.invidi.pts_delta/apps/ipd/src/mpeg_ingest_rtp.erl"},{line,49}]},{gen_server,init_it,2,[{file,"gen_server.erl"},{line,417}]},{gen_server,init_it,6,[{file,"gen_server.er
l"},{line,385}]},{proc_lib,init_p_do_apply,3,[{file,"proc_lib.erl"},{line,226}]}]}. Offender: id=ptc_6254_A,pid=undefined.

Mark.


> On Jan 28, 2021, at 10:27 AM, Micael Karlberg <micael.karlberg@REDACTED> wrote:
> 
> Before the call to the setopt, add a call to socket:setopt(Socket, otp, debug, true).
> 
> /BMK
> 
> 
> From: erlang-questions on behalf of Mark Geib
> Sent: Thursday, January 28, 2021 6:24 PM
> To: Erlang Questions
> Subject: problem with new socket module setopt()
> 
> I am using the new socket module in order to join a source-specific multicast and receive datagrams. The following code fails with a “badarg” error on the socket:setopt() call. I have carefully checked the docs for R23, but can not find the problem.
> 
>     {ok, GroupAddr} = inet:getaddr(Group, inet),
>     {ok, SourceAddr} = inet:getaddr(Source, inet),
>     {ok, IfAddr} = inet:getaddr(Interface, inet),
>     IpMreqSource = #{multiaddr => GroupAddr,
>                      interface => IfAddr,
>                      sourceaddr => SourceAddr},
> 
>     {ok, Socket} = socket:open(inet, dgram, udp),
>     {ok, Port} = socket:bind(Socket, #{family => inet, port => Port, addr => GroupAddr}),
>     ok = socket:setopt(Socket, ip, add_source_membership,  IpMreqSource),
> 
> I am using Erlang R23, latest release on debian-9 host.
> Any suggestions would be appreciated greatly.
> 
> Mark.

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