[erlang-questions] : : sctp_peer_addr_params

Raimo Niskanen <>
Wed Jan 28 11:13:45 CET 2009


On Wed, Jan 28, 2009 at 10:20:25AM +0100, Mikael Lixenstrand wrote:
> I got another problem with some settings now that used to work with the
> unpatched R12B-0
> 
> {badarg,[{gen_sctp,open,[[{ip,{10,70,128,108}},{mode,binary},{active,false},{sctp_events,{sctp_event_subscribe,undefined,undefined,false,undefined,undefined,false,undefined,undefined}}]]}
> 
> {sctp_events,#sctp_event_subscribe{address_event = false,
> shutdown_event=false}
> 
> Not as big problem as before but might be something you are intrested in.

No problem, this time I can get away with blaiming the user (you),
more or less :-)

You are most probably running code that was compiled for R12B-0
(inet_sctp.hrl), that header file got a new field authentication_event
in R12B-1. You need to recompile with the new header file. The
{sctp_event_subscribe,...} tuple above is missing one element.

The curse of compile time dependencies...

> / Mikael
> 2009/1/28 Mikael Lixenstrand <>
> 
> > Thank you.
> >
> > This helped me a great deal. I had some compilation problems with R12B-5
> > but when i solved that i worked perfect.
> >
> > / Mikael
> >
> > 2009/1/22 Raimo Niskanen <<raimo%>
> > >
> >
> >> On Thu, Jan 22, 2009 at 08:53:51AM +0100, Raimo Niskanen wrote:
> >> > On Wed, Jan 21, 2009 at 07:52:56AM +0100, Mikael Lixenstrand wrote:
> >> > > I'm trying to change the sack delay in gen_sctp
> >> > >
> >> > >  {ok,Socket} = gen_sctp:open([{ip, ServerIPAddress}, {port,
> >> ServerPort}]
> >> > >   ++ [{sctp_peer_addr_params, #sctp_paddrparams{ assoc_id = 0, address
> >> =
> >> > > {ServerIPAddress ,ServerPort} ,sackdelay = 400}},
> >> > >   {mode, binary},
> >> > >   {active, false},
> >> > >   {sctp_events,#sctp_event_subscribe{address_event = false,
> >> > > shutdown_event=false}}]),
> >> > >
> >> > > I tried several approaches but with the same result:
> >> > >
> >> > > Error in process <0.7100.1> on node '' with exit value:
> >> > >
> >> {badarg,[{gen_sctp,open,[[{ip,{10,70,160,17}},{port,3868},{sctp_peer_addr_params,{sctp_paddrparams,0,{{10,70,160,17},3868},200,5,600,400,[]}},{mode,binary},{active,false},{sctp_events,{sctp_event_subscribe,undefined,undefined,false,undefined,undefined...
> >> > >
> >> > > I'm running R12B-0 on rhel 5.2
> >> > >
> >> >
> >> > Congratulations, you have found a bug!
> >> >
> >> > You have dived down to the untested parts of the SCTP code.
> >> > It is still something we have left to do to write thorough
> >> > test cases for gen_sctp. Unfortunately there are a _lot_
> >> > of options and functionality to test so it is a big task.
> >> >
> >> > Nevertheless..
> >> >
> >> > The decoding in the inet driver for #sctp_paddrparams{address={IP,P}}
> >> > is wrong; it does not expect the address family byte that it gets
> >> > and detects a parameter length mismatch.
> >> >
> >> > I had a small patch yesterday, but I could not set default
> >> > sctp_peer_addr_params for future associations, so I started
> >> > to read the spec, and indeed it should be possible.
> >> >
> >> > So yesterdays 2 character patch of inet_drv.c now is a patch
> >> > for erts/configure.in, inet_drv.c and prim_inet.erl. I will
> >> > do some more testing and post a patch hopefully during the day.
> >>
> >> Here is the patch. Unfortunately it is a minimal path for the
> >> current development branch so it will not be applied cleanly
> >> to R12B-5 or any other released source. But applying it manually
> >> should be no problem for the initiated user.
> >>
> >> erts/configure.in: Spelling error `ssh_data' -> `ssf_data'
> >>        To do this manually to its autoconf result erts/configure
> >>        change all occurences of `ssh_data' to `ssf_data' while
> >>        preserving case. I have searched and there are
> >>        no false occurences.
> >>
> >> erts/emulator/drivers/common/inet_drv.c:
> >>        Two changes of inet_set_address -> inet_set_faddress.
> >>        A few changes of HAVE_SCTP_* -> HAVE_STRUCT_SCTP_*.
> >>        Use the patch to find the places.
> >>
> >> erts/preloaded/src/prim_inet.erl:
> >>        This file has moved in our development branch;
> >>        I think it was in lib/kernerl/src in R12B-5.
> >>
> >> With these patches it appears to work. Note that it is the
> >> peers address and port you use in the option! To set it
> >> on future associations you must not specify the peer
> >> address or association id. This is now possible thanks
> >> to the prim_inet.erl patch. Without that patch you
> >> could use address={{0,0,0,0},0} and assoc_id=0.
> >> See http://tools.ietf.org/html/draft-ietf-tsvwg-sctpsocket-13#section-7
> >> just before section 7.1, and
> >> http://tools.ietf.org/html/draft-ietf-tsvwg-sctpsocket-13#section-7.1.13
> >>
> >> In one erlang shell:
> >>
> >> Erlang R13A (erts-5.7) [64-bit] [smp:4] [async-threads:0]
> >> [kernel-poll:false]
> >>
> >> Eshell V5.7  (abort with ^G)
> >> 1> gen_sctp:open([{ip,loopback}]).
> >> {ok,#Port<0.444>}
> >> 2> {ok,S} = v(-1).
> >> {ok,#Port<0.444>}
> >> 3> gen_sctp:listen(S, true).
> >> ok
> >> 4> inet:port(S).
> >> {ok,32850}
> >>
> >> And then the action in another erlang shell:
> >>
> >> Erlang R13A (erts-5.7) [64-bit] [smp:4] [async-threads:0]
> >> [kernel-poll:false]
> >>
> >> Eshell V5.7  (abort with ^G)
> >> 1> rr(inet).
> >> [connect_opts,hostent,listen_opts,sctp_adaptation_event,
> >>  sctp_assoc_change,sctp_assoc_value,sctp_assocparams,
> >>  sctp_event_subscribe,sctp_initmsg,sctp_opts,
> >>  sctp_paddr_change,sctp_paddrinfo,sctp_paddrparams,
> >>  sctp_pdapi_event,sctp_prim,sctp_remote_error,sctp_rtoinfo,
> >>  sctp_send_failed,sctp_setadaptation,sctp_setpeerprim,
> >>  sctp_shutdown_event,sctp_sndrcvinfo,sctp_status,udp_opts]
> >> 2> {ok,S} = gen_sctp:open([{sctp_peer_addr_params,
> >> #sctp_paddrparams{sackdelay=400,flags=[sackdelay_enable]}}]).
> >> {ok,#Port<0.456>}
> >> 3> gen_sctp:connect(S, localhost, 32850, []).
> >> {ok,#sctp_assoc_change{state = comm_up,error = 0,
> >>                       outbound_streams = 10,inbound_streams = 10,
> >>                       assoc_id = 1}}
> >> 4> inet:setopts(S, [{sctp_peer_addr_params,
> >> #sctp_paddrparams{sackdelay=500,flags=[sackdelay_enable],assoc_id=1,address={loopback,32850}}}]).
> >> ok
> >> 5> inet:getopts(S, [sctp_peer_addr_params]).
> >> {ok,[{sctp_peer_addr_params,
> >>         #sctp_paddrparams{
> >>             assoc_id = 0,
> >>             address = {{0,0,0,0},0},
> >>             hbinterval = 30000,pathmaxrxt = 5,pathmtu = 0,
> >>             sackdelay = 400,
> >>             flags = [hb_enable,pmtud_enable,sackdelay_enable]}}]}
> >> 6> inet:getopts(S, [{sctp_peer_addr_params,
> >> #sctp_paddrparams{assoc_id=1,address={loopback,32850}}}]).
> >> {ok,[{sctp_peer_addr_params,
> >>         #sctp_paddrparams{
> >>             assoc_id = 1,
> >>             address = {{127,0,0,1},32850},
> >>             hbinterval = 30000,pathmaxrxt = 5,pathmtu = 16436,
> >>             sackdelay = 500,
> >>             flags = [hb_enable,pmtud_enable,sackdelay_enable]}}]}
> >>
> >>
> >> >
> >> > > Thanks
> >> >
> >> > > _______________________________________________
> >> > > erlang-questions mailing list
> >> > > 
> >> > > http://www.erlang.org/mailman/listinfo/erlang-questions
> >> >
> >> > --
> >> >
> >> > / Raimo Niskanen, Erlang/OTP, Ericsson AB
> >> > _______________________________________________
> >> > erlang-questions mailing list
> >> > 
> >> > http://www.erlang.org/mailman/listinfo/erlang-questions
> >>
> >> --
> >>
> >> / Raimo Niskanen, Erlang/OTP, Ericsson AB
> >>
> >
> >

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-- 

/ Raimo Niskanen, Erlang/OTP, Ericsson AB



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