ipv6_v6only option is not available on R15B and results in {error,einval}

[djnym]

I happened to be investigating something and discovered this. Since you want to recon to work for R15B02 (at least according to the README), I figured you'd want to know. Most likely you can just move the ipv6_v6only to a different optional part to fix it. If I have a chance I'll submit a pull request with the change.

Erlang R15B03 (erts-5.9.3.1) [source] [64-bit] [smp:2:2] [async-threads:0] [hipe] [kernel-poll:false]

Eshell V5.9.3.1  (abort with ^G)
1>  {ok, P} = gen_udp:open (12111, [ { reuseaddr, true }, {ip, {0,0,0,0}}]).
{ok,#Port<0.824>}
2>  inet:getopts(P,[active, broadcast,buffer,delay_send, dontroute,exit_on_close,header,high_watermark,keepalive,linger, low_watermark, mode, nodelay,packet, packet_size, priority,read_packets, recbuf, reuseaddr,send_timeout, sndbuf]).
{ok,[{active,true},
     {broadcast,false},
     {buffer,8192},
     {dontroute,false},
     {exit_on_close,true},
     {header,0},
     {keepalive,false},
     {linger,{false,0}},
     {mode,list},
     {packet,0},
     {packet_size,0},
     {priority,0},
     {read_packets,5},
     {recbuf,16384},
     {reuseaddr,true},
     {sndbuf,212992}]}
3> inet:getopts(P,[active, broadcast,buffer,delay_send, dontroute,exit_on_close,header,high_watermark,keepalive,linger, low_watermark, mode, nodelay,packet, packet_size, priority,read_packets, recbuf, reuseaddr,send_timeout, sndbuf,ipv6_v6only]).
{error,einval}
4>

[ferd]

I think I'd be fine with just having it taken out altogether, or through some macro or whatever.

[linearregression]

Do you think add ipv6_v6only only after a pass of run time check of otp release of R15B03 and later is enough?

[ferd]

I'ma go ahead and say I won't be supporting R15B03 explicitly anymore. It will be a best-effort thing.