[erlang-patches] [PATCH] Fix SCTP multihoming for IPv6
Raimo Niskanen
raimo+erlang-patches@REDACTED
Tue Aug 21 11:23:12 CEST 2012
On Tue, Aug 21, 2012 at 11:06:10AM +0200, Tomas Abrahamsson wrote:
> >> Hi, please refetch!
> > I think you missed one clause, see below.
>
> Hmm.. I fail to see why that clause would be needed.
> Every element in the list is already expected to be
> tuples of {Ip,Port}, as returned by the set_bindx_port
> function, which was unfortunately not included in full
> in the diff output -- maybe I ought to have increased the
> number of context lines.
>
> Below is the entire snippet of code. Is the extra clause
> to change_bindx_0_port still needed?
> https://github.com/tomas-abrahamsson/otp/compare/sctp-multihoming.patch
Nope. You are right.
I missed that set_bindx_port/2 had been run on the list...
>
> +bindx(S, [Addr], Port0) ->
> + {IP, Port} = set_bindx_port(Addr, Port0),
> + prim_inet:bind(S, IP, Port);
> +bindx(S, Addrs, Port0) ->
> + [{IP, Port} | Rest] = [set_bindx_port(Addr, Port0) || Addr <- Addrs],
> + case prim_inet:bind(S, IP, Port) of
> + {ok, AssignedPort} when Port =:= 0 ->
> + %% On newer Linux kernels, Solaris and FreeBSD, calling
> + %% bindx with port 0 is ok, but on SuSE 10, it results in einval
> + Rest2 = [change_bindx_0_port(Addr, AssignedPort) || Addr <- Rest],
> + prim_inet:bind(S, add, Rest2);
> + {ok, _} ->
> + prim_inet:bind(S, add, Rest);
> + Error ->
> + Error
> + end.
> +
> +set_bindx_port({_IP, _Port}=Addr, _OtherPort) ->
> + Addr;
> +set_bindx_port(IP, Port) ->
> + {IP, Port}.
> +
> +change_bindx_0_port({IP, 0}, AssignedPort) ->
> + {IP, AssignedPort};
> +change_bindx_0_port({_IP, _Port}=Addr, _AssignedPort) ->
> + Addr.
>
> (For completeness: change_bindx_0_port with the extra clause:
> >> +change_bindx_0_port({IP, 0}, AssignedPort) ->
> >> + {IP, AssignedPort};
> >> +change_bindx_0_port({_IP, _Port}=Addr, _AssignedPort) ->
> > + Addr;
> > +change_bindx_0_port(Addr, AssignedPort) ->
> > + {Addr, AssignedPort}.
> )
>
> BRs
> Tomas
--
/ Raimo Niskanen, Erlang/OTP, Ericsson AB
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