[erlang-questions] Diameter client issue

S X <>
Tue Mar 26 15:48:11 CET 2013


Hi, Rudolph & Anders,

Not sure your problem is resolved or not.

I was able to use the diameter sample code with the local/remote mode,
i.e.  Start a diameter server in an erts on a pc, and start a diameter
client in an erts on another pc (I use virtual machines as pcs here). They
can communicate different types of diameter messages without problems.

However, when I try to use a diameter client (the sample code) from an erts
to connect a diameter server which is not running within an erts (other
diameter server not implemented in erlang). It doesn't work(can not build
up a connection). I am not quite familiar with the detailed implementation
of the erlang diameter library now. I am feeling that the erlang diameter
relies on the erlang nodes, which means all the peers are built up only on
the erts (distributed erlang runtimes). Does the erlang diameter only work
within erlang environment? Or in order to talk to other diameter servers,
does it need to write another erlang client using some functions from the
erlang diameter library, like encode/decode? The sample client code doesn't
work in this situation.

I am not sure my understanding above is correct or not. Can you provide
some guidance?

Thanks,

Samuel



On Thu, Mar 21, 2013 at 9:00 AM, Anders Svensson <>wrote:

> One more time to the list ...
>
> On Thu, Mar 21, 2013 at 12:58 PM, Anders Svensson <>
> wrote:
> > The problem looks to be that there's an {ssl, false} option being into
> > diameter_tcp and then down to gen_tcp, which causes it to raise
> > badarg. What OTP release is this? I can't say I recall the example
> > code passing this tuple.
> >
> > /Anders, Erlang/OTP
> >
> >
> >
> > On Wed, Mar 20, 2013 at 6:08 PM, Rudolph van Graan <>
> wrote:
> >> Hi there,
> >>
> >> I'm trying to start up the Erlang diameter demo application shipped with
> >> Erlang/OTP. The issue is that, no matter what format I try, I can't get
> the
> >> client to connect to a remote diameter server.
> >>
> >> In that example, I started the application as follows:
> >>
> >> 3>  diameter:start(), client:start().
> >> ok
> >>
> >> 4> client:connect({tcp,{10,151,0,166},{10,249,20,174},3868}).
> >> {ok,#Ref<0.0.0.643>}
> >>
> >> 7> client:call().
> >> {error,no_connection}
> >>
> >>
> >> Here, my local IP address is {10,151,0,166} and the remote one is
> >> {10,249,20,174}.
> >>
> >> TCP to the server is working:
> >>
> >> telnet 10.249.20.174 3868
> >> Trying 10.249.20.174...
> >> Connected to 10.249.20.174.
> >> Escape character is '^]'.
> >>
> >>
> >> I traced diameter_tcp and I can see that it is getting a badarg error
> >> somewhere:
> >>
> >> (<0.114.0>) returned from diameter_tcp:start/3 -> {ok,<0.115.0>,
> >>                                                    [{10,151,0,166}]}
> >> (<0.116.0>) call
> >>
> diameter_tcp:handle_info({'DOWN',#Ref<0.0.0.924>,process,<0.115.0>,badarg},{monitor,<0.114.0>,<0.115.0>})
> >> (<0.116.0>) call
> >>
> diameter_tcp:m({'DOWN',#Ref<0.0.0.924>,process,<0.115.0>,badarg},{monitor,<0.114.0>,<0.115.0>})
> >> (<0.116.0>) returned from diameter_tcp:m/2 -> ok
> >>
> >> Does anyone have an idea what I am doing wrong? My feeling is that it
> has to
> >> do with the local ip address. I don't understand why I even need to
> supply a
> >> local IP address and the documentation isn't very clear.
> >>
> >> Thanks,
> >>
> >> Rudolph
> >>
> >>
> >>  Here is the trace:
> >>
> >> (<0.84.0>) call diameter_tcp:start_link({monitor,<0.114.0>,<0.115.0>})
> >> (<0.116.0>) call diameter_tcp:init({monitor,<0.114.0>,<0.115.0>})
> >> (<0.116.0>) call diameter_tcp:i({monitor,<0.114.0>,<0.115.0>})
> >> (<0.116.0>) returned from diameter_tcp:i/1 ->
> {monitor,<0.114.0>,<0.115.0>}
> >> (<0.84.0>) returned from diameter_tcp:start_link/1 -> {ok,<0.116.0>}
> >> (<0.115.0>) call diameter_tcp:ssl([{ssl,false},
> >>  {ip,{10,151,0,166}},
> >>  {raddr,{10,249,20,174}},
> >>  {rport,3868},
> >>  {reuseaddr,true}])
> >> (<0.115.0>) call diameter_tcp:ssl_opts([])
> >> (<0.115.0>) returned from diameter_tcp:ssl_opts/1 -> false
> >> (<0.115.0>) returned from diameter_tcp:ssl/1 -> {false,
> >>                                                  [{ssl,false},
> >>                                                   {ip,{10,151,0,166}},
> >>
> {raddr,{10,249,20,174}},
> >>                                                   {rport,3868},
> >>                                                   {reuseaddr,true}]}
> >> (<0.115.0>) call
> >>
> diameter_tcp:i(connect,#Ref<0.0.0.643>,gen_tcp,<0.114.0>,false,[{ssl,false},
> >>  {ip,{10,151,0,166}},
> >>  {raddr,{10,249,20,174}},
> >>  {rport,3868},
> >>  {reuseaddr,true}],[])
> >> (<0.115.0>) call
> >> diameter_tcp:i(connect,#Ref<0.0.0.643>,gen_tcp,<0.114.0>,[{ssl,false},
> >>  {ip,{10,151,0,166}},
> >>  {raddr,{10,249,20,174}},
> >>  {rport,3868},
> >>  {reuseaddr,true}],[])
> >> (<0.115.0>) call diameter_tcp:get_addr([{ip,{10,151,0,166}}],[])
> >> (<0.115.0>) call diameter_tcp:addr([{ip,{10,151,0,166}}],[])
> >> (<0.115.0>) returned from diameter_tcp:addr/2 -> {10,151,0,166}
> >> (<0.115.0>) returned from diameter_tcp:get_addr/2 -> {10,151,0,166}
> >> (<0.115.0>) call diameter_tcp:get_addr([{raddr,{10,249,20,174}}],[])
> >> (<0.115.0>) call diameter_tcp:addr([{raddr,{10,249,20,174}}],[])
> >> (<0.115.0>) returned from diameter_tcp:addr/2 -> {10,249,20,174}
> >> (<0.115.0>) returned from diameter_tcp:get_addr/2 -> {10,249,20,174}
> >> (<0.115.0>) call diameter_tcp:get_port([{rport,3868}])
> >> (<0.115.0>) returned from diameter_tcp:get_port/1 -> 3868
> >> (<0.115.0>) call
> >> diameter_tcp:gen_opts({10,151,0,166},[{ssl,false},{reuseaddr,true}])
> >> (<0.115.0>) returned from diameter_tcp:gen_opts/2 -> [binary,
> >>                                                       {packet,0},
> >>                                                       {active,once},
> >>
> {ip,{10,151,0,166}},
> >>                                                       {ssl,false},
> >>                                                       {reuseaddr,true}]
> >> (<0.82.0>) returned from diameter_tcp:start_link/1 -> {ok,<0.115.0>,
> >>                                                        [{10,151,0,166}]}
> >> (<0.115.0>) call
> diameter_tcp:connect(gen_tcp,{10,249,20,174},3868,[binary,
> >>  {packet,0},
> >>  {active,once},
> >>  {ip,{10,151,0,166}},
> >>  {ssl,false},
> >>  {reuseaddr,true}])
> >> (<0.114.0>) returned from diameter_tcp:start/3 -> {ok,<0.115.0>,
> >>                                                    [{10,151,0,166}]}
> >> (<0.116.0>) call
> >>
> diameter_tcp:handle_info({'DOWN',#Ref<0.0.0.924>,process,<0.115.0>,badarg},{monitor,<0.114.0>,<0.115.0>})
> >> (<0.116.0>) call
> >>
> diameter_tcp:m({'DOWN',#Ref<0.0.0.924>,process,<0.115.0>,badarg},{monitor,<0.114.0>,<0.115.0>})
> >> (<0.116.0>) returned from diameter_tcp:m/2 -> ok
> >> (<0.116.0>) call
> >> diameter_tcp:x({'DOWN',#Ref<0.0.0.924>,process,<0.115.0>,badarg})
> >> (<0.116.0>) call
> >>
> diameter_tcp:terminate({shutdown,{'DOWN',#Ref<0.0.0.924>,process,<0.115.0>,badarg}},{monitor,<0.114.0>,<0.115.0>})
> >> (<0.116.0>) returned from diameter_tcp:terminate/2 -> ok
> >>
> >>
> >>
> >> _______________________________________________
> >> erlang-questions mailing list
> >> 
> >> http://erlang.org/mailman/listinfo/erlang-questions
> >>
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> 
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