Re: How to set IP address for socket?

[Jon Kleiser]

Hi Alex,

No, it's not in Norway. Could be in Canada ... It's in the "cloud"
somewhere, Cloud9. ;-)

/Jon

> On Sun, May 19, 2013 at 06:45:33PM +0200, Alexander Burger wrote:
>> On Sun, May 19, 2013 at 06:27:21PM +0200, Alexander Burger wrote:
>> > Work perfectly! Congratulations! :)
>>
>> However, the time is strange. It says
>>
>>It's now 12:44:27 (around here)
>>
>> Is the server not in Norway? I'd expect 19:44:27 then.
>
> Taking a closer look, it seems in Canada, right?
>
>
> BTW, if I'd want to make a form with a time-field, which updates its
> value whenever you press a button:
>
>(allowed ()
>   "!home" setTime "@lib.css" )
>
>(load "@lib/http.l" "@lib/xhtml.l" "@lib/form.l")
>
>(de setTime (H M S)
>   (set> (: time) (time H M S)) )
>
>(de home ()
>   (app)
>   (action
>  (html 0 "Local Time" "@lib.css" NIL
> (form NIL
>(gui 'time '(+Lock +TimeField) 10 "Local Time")
>()
>(gui '(+OnClick +Button)
>   "var t = new Date();
>  return lisp(this.form, 'setTime',
> t.getHours(),
> t.getMinutes(),
> t.getSeconds())"
>   "Now!" ) ) ) ) )
>
>(de go ()
>   (server 8080 "!home") )
>
> Started as
>
>pil .l -go +  # Debug
>pil .l -go -wait  # Production
>
> ?? Alex

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Re: How to set IP address for socket?

[Alexander Burger]

On Sun, May 19, 2013 at 06:45:33PM +0200, Alexander Burger wrote:
> On Sun, May 19, 2013 at 06:27:21PM +0200, Alexander Burger wrote:
> > Work perfectly! Congratulations! :)
> 
> However, the time is strange. It says
> 
>It's now 12:44:27 (around here)
> 
> Is the server not in Norway? I'd expect 19:44:27 then.

Taking a closer look, it seems in Canada, right?


BTW, if I'd want to make a form with a time-field, which updates its
value whenever you press a button:

   (allowed ()
  "!home" setTime "@lib.css" )

   (load "@lib/http.l" "@lib/xhtml.l" "@lib/form.l")

   (de setTime (H M S)
  (set> (: time) (time H M S)) )

   (de home ()
  (app)
  (action
 (html 0 "Local Time" "@lib.css" NIL
(form NIL
   (gui 'time '(+Lock +TimeField) 10 "Local Time")
   ()
   (gui '(+OnClick +Button)
  "var t = new Date();
 return lisp(this.form, 'setTime',
t.getHours(),
t.getMinutes(),
t.getSeconds())"
  "Now!" ) ) ) ) )

   (de go ()
  (server 8080 "!home") )

Started as

   pil .l -go +  # Debug
   pil .l -go -wait  # Production

♪♫ Alex
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Re: How to set IP address for socket?

[Alexander Burger]

On Sun, May 19, 2013 at 06:27:21PM +0200, Alexander Burger wrote:
> Work perfectly! Congratulations! :)

However, the time is strange. It says

   It's now 12:44:27 (around here)

Is the server not in Norway? I'd expect 19:44:27 then.

♪♫ Alex
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Re: How to set IP address for socket?

[Alexander Burger]

Hi Jon,

> Yes, that ipv6-mapped address made the difference! My tiny PicoLips server
> is now running at . It probably won't
> run for a very long time, but I'm very satisfied. ;-)

Work perfectly! Congratulations! :)

♪♫ Alex
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Re: How to set IP address for socket?

[Jon Kleiser]

Hi Rowan & Alex,

Yes, that ipv6-mapped address made the difference! My tiny PicoLips server
is now running at . It probably won't
run for a very long time, but I'm very satisfied. ;-)
(I obviously have to fix something re. the "default" file, in doc/, but
that's something else.)

/Jon

> On Fri, May 17, 2013 at 02:05:10AM +0300, Rowan Thorpe wrote:
>> you to do, but instead of:
>>
>>   : MyIpAddr asciz "127.6.26.129"
>>
>> you put the ipv6-mapped address for it:
>>
>>   : MyIpAddr asciz ":::127.6.26.129"
>
> Thanks Rowan! This sounds like a very reasonable hint!
>
> ?? Alex

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Re: How to set IP address for socket?

[Alexander Burger]

On Fri, May 17, 2013 at 02:05:10AM +0300, Rowan Thorpe wrote:
> you to do, but instead of:
> 
>   : MyIpAddr asciz "127.6.26.129"
> 
> you put the ipv6-mapped address for it:
> 
>   : MyIpAddr asciz ":::127.6.26.129"

Thanks Rowan! This sounds like a very reasonable hint!

♪♫ Alex
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Re: How to set IP address for socket?

[Rowan Thorpe]

> Alexander Burger wrote:
>
> I see. So my proposal of calling inet_pton() was not correct :(
>
> I have no idea at the moment. Somebody (me?) must dig into TCP
> networking (again). Haven't touched that for a while.

Jon,

I think I might have found an explanation for the "already bound"
error, and if it is this, then the error is not very appropriately
worded (it might actually be a propagated inet_pton syntax error). On
the inet_pton manpage I found this:

   BUGS:
   AF_INET6 does not recognize IPv4 addresses.  An explicit IPv4-mapped
   IPv6 address must be supplied in src instead.

Hopefully someone will get around to fixing that one day (I would have
thought it would be a trivial fix...?!). The ipv6 address space is a
(128bit) superset of the (32bit) ipv4 space anyway, so I don't see a
reason *against* handling that syntax too...

What happens if you do the same steps in the last version Alex told
you to do, but instead of:

  : MyIpAddr asciz "127.6.26.129"

you put the ipv6-mapped address for it:

  : MyIpAddr asciz ":::127.6.26.129"

..?
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Re: How to set IP address for socket?

[Jon Kleiser]

Hi Alex,

I'll be off-line for a couple of days. Have a nice weekend!

/Jon


On 16-05-13 16:38 , Alexander Burger wrote:

Hi Jon,


stackoverflow) that works. It uses "server = TCPServer.open(host,
port)" where 'host' is "127.6.26.129" and 'port' is 8080. Right now

I see. So my proposal of calling inet_pton() was not correct :(

I have no idea at the moment. Somebody (me?) must dig into TCP
networking (again). Haven't touched that for a while.

Anybody who knows a direct solution?

♪♫ Alex


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Re: How to set IP address for socket?

[Alexander Burger]

Hi Jon,

> stackoverflow) that works. It uses "server = TCPServer.open(host,
> port)" where 'host' is "127.6.26.129" and 'port' is 8080. Right now

I see. So my proposal of calling inet_pton() was not correct :(

I have no idea at the moment. Somebody (me?) must dig into TCP
networking (again). Haven't touched that for a while.

Anybody who knows a direct solution?

♪♫ Alex
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Re: How to set IP address for socket?

[Jon Kleiser]

Hi Alex & Rowan,

As far as I can see, there is no other process listening on 8080 at the 
moment when I get this "Address already in use". However, I've just 
managed to put together a tiny Ruby server (found something on 
stackoverflow) that works. It uses "server = TCPServer.open(host, port)" 
where 'host' is "127.6.26.129" and 'port' is 8080. Right now it's 
available here , but not for very 
long ...

When I do the "lsof -i :8080" now, I get this:

COMMAND   PID USER   FD   TYPE   DEVICE SIZE/OFF 
NODE NAME
ruby16690 517cfc7750044649680001965u  IPv4 21717622  0t0  
TCP 127.6.26.129:webcache (LISTEN)


/Jon

On 16-05-13 15:34 , Alexander Burger wrote:

Hi Rowan,


Just throwing in an observation in case it hasn't already occurred
to you - the "Address already in use" error might well not be a picolisp
or C9 problem at all, but that you are reconnecting to the socket
without having set the SO_REUSEADDR option (or equivalent). Without it
you can't reconnect to an already connected socket, e.g. for about 90
seconds on Linux, or similar duration on other platforms (must wait

That's right. But in this case the function in question ('port') does
indeed set this option.


However, it still might be the case that some other service is already
listening at that port, perhaps even some not-yet-terminated instance of
your application.

You can find out the culprit with

$ lsof -i :8080
COMMANDPID USER   FD   TYPE  DEVICE SIZE/OFF NODE NAME
picolisp 20278  app   16u  IPv6 2098603  0t0  TCP *:http-alt (LISTEN)

♪♫ Alex


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Re: How to set IP address for socket?

[Alexander Burger]

Hi Rowan,

> Just throwing in an observation in case it hasn't already occurred
> to you - the "Address already in use" error might well not be a picolisp
> or C9 problem at all, but that you are reconnecting to the socket
> without having set the SO_REUSEADDR option (or equivalent). Without it
> you can't reconnect to an already connected socket, e.g. for about 90
> seconds on Linux, or similar duration on other platforms (must wait

That's right. But in this case the function in question ('port') does
indeed set this option.


However, it still might be the case that some other service is already
listening at that port, perhaps even some not-yet-terminated instance of
your application.

You can find out the culprit with

   $ lsof -i :8080
   COMMANDPID USER   FD   TYPE  DEVICE SIZE/OFF NODE NAME
   picolisp 20278  app   16u  IPv6 2098603  0t0  TCP *:http-alt (LISTEN)

♪♫ Alex
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Re: How to set IP address for socket?

[Rowan Thorpe]

> > Thanks! The 'make' went fine now. However, when I try to run my web
> > app now, I get "IP bind error: Address already in use". ;-)
> > I think I may have to bother C9 Support again.
> 
> Ah, but perhaps this is (partially) good news, because it seems to
> have taken the address! :)

Just throwing in an observation in case it hasn't already occurred
to you - the "Address already in use" error might well not be a picolisp
or C9 problem at all, but that you are reconnecting to the socket
without having set the SO_REUSEADDR option (or equivalent). Without it
you can't reconnect to an already connected socket, e.g. for about 90
seconds on Linux, or similar duration on other platforms (must wait
for OS to release socket based on its own view of things).

If that is totally unhelpful or irrelevant then sorry for the
line-noise ;-)

Rowan Thorpe
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Re: How to set IP address for socket?

[Alexander Burger]

Hi Jon,

> Thanks! The 'make' went fine now. However, when I try to run my web
> app now, I get "IP bind error: Address already in use". ;-)
> I think I may have to bother C9 Support again.

Ah, but perhaps this is (partially) good news, because it seems to have
taken the address! :)

I'm not sure at all if the approach calling inet_pton() is correct.

♪♫ Alex
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Re: How to set IP address for socket?

[Jon Kleiser]

Hi Alex,

Thanks! The 'make' went fine now. However, when I try to run my web app 
now, I get "IP bind error: Address already in use". ;-)

I think I may have to bother C9 Support again.

/Jon

On 14-05-13 15:58 , Alexander Burger wrote:

Hi Jon,


(.text+0x1c29c): undefined reference to `MyIpAddr'

Oops, sorry. It seems I didn't put a constant string this way since a
long time ;-)

Probably this string needs to be put into the 'data' section. You could
call (data ...), but the easiest is if you insert it into "src64/glob.l"
where most of the other data reside.

I would suggest you put it at the end of "src64/glob.l", after the
"System messages".

...
: UndefErr asciz "Undefined"
: DlErr asciz "[DLL] %s"

: MyIpAddr asciz "127.6.26.129"

♪♫ Alex


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Re: How to set IP address for socket?

[Alexander Burger]

Hi Jon,

> (.text+0x1c29c): undefined reference to `MyIpAddr'

Oops, sorry. It seems I didn't put a constant string this way since a
long time ;-)

Probably this string needs to be put into the 'data' section. You could
call (data ...), but the easiest is if you insert it into "src64/glob.l"
where most of the other data reside.

I would suggest you put it at the end of "src64/glob.l", after the
"System messages".

   ...
   : UndefErr asciz "Undefined"
   : DlErr asciz "[DLL] %s"

   : MyIpAddr asciz "127.6.26.129"

♪♫ Alex
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Re: How to set IP address for socket?

[Jon Kleiser]

Hi Alex,

On 14-05-13 07:30 , Alexander Burger wrote:

Hi Jon,


After doing #1, lines 4-7 look like this:

# (port ['T] 'cnt|(cnt . cnt) ['var]) ->  cnt
(code 'doPort 2)
: MyIpAddr asciz "127.6.26.129"   # may work on Cloud9
push X

Sorry, no, this is the wrong place. You've put the constant string right
into the 'doPort' function definition. That's why there is an


Illegal instruction

because the string is not executable code.


Better try this:

: MyIpAddr asciz "127.6.26.129"

# (port ['T] 'cnt|(cnt . cnt) ['var]) ->  cnt
(code 'doPort 2)
   push X
   push Y
   ...

♪♫ Alex


No, sorry, the 'make' fails:

../picoLisp/src64 (master) $ make
x86-64.linux.base.o: In function `.3314':
(.text+0x1c29c): undefined reference to `MyIpAddr'
collect2: ld returned 1 exit status
make: *** [../bin/picolisp] Error 1

/Jon
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Re: How to set IP address for socket?

[Alexander Burger]

Hi Jon,

> After doing #1, lines 4-7 look like this:
> 
> # (port ['T] 'cnt|(cnt . cnt) ['var]) -> cnt
> (code 'doPort 2)
> : MyIpAddr asciz "127.6.26.129"   # may work on Cloud9
>push X

Sorry, no, this is the wrong place. You've put the constant string right
into the 'doPort' function definition. That's why there is an

> Illegal instruction

because the string is not executable code.


Better try this:

   : MyIpAddr asciz "127.6.26.129"

   # (port ['T] 'cnt|(cnt . cnt) ['var]) -> cnt
   (code 'doPort 2)
  push X
  push Y
  ...

♪♫ Alex
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Re: How to set IP address for socket?

[Jon Kleiser]

Hi Alex,

> Hi Jon,
>
>> >
>> >>Cloud9 IDE Support, I have to set the IP to which the socket (port
>> >>8080) should bind, to 127.6.26.129. How do I set this IP in
>> >>PicoLisp?
>> ...
>> At the moment, modifying "src64/net.l" sounds like the easiest way
>> to get a web app running on Cloud9. However, I'm not familiar with
>> the (assembly) language used in that file. Do you have any idea of
>> how a tweek to that file would look?
>
> Hmm, just an _idea_. I'm absolutely unsure whether I'm on the right
> track with that. No guarantee! :)
>
> My guess is:
>
>
> 1. Put the line
>
>: MyIpAddr asciz "127.6.26.129"
>
>somehere into "src64/net.l", e.g. before or after 'doPort'.
>
> 2. Change line 36 of "src64/net.l"
>
>   mset (Addr SIN6_ADDR) 16  # "::" (16 null-bytes)
>
>to
>
>   cc inet_pton(AF_INET6 MyIpAddr &(Addr SIN6_ADDR))
>
> Does this work?
>
> ?? Alex

After doing #1, lines 4-7 look like this:

# (port ['T] 'cnt|(cnt . cnt) ['var]) -> cnt
(code 'doPort 2)
: MyIpAddr asciz "127.6.26.129" # may work on Cloud9
   push X

.. and then I did change #2. Then I went into src63 and did a "make
clean" and then a "make", and then "cd ..". However, when I tried to start
my web.l, I got this:

Starting server using port 8080
Illegal instruction

.. so it's not exactly working yet. ;-)

/Jon

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Re: How to set IP address for socket?

[Alexander Burger]

Hi Jon,

> >
> >>Cloud9 IDE Support, I have to set the IP to which the socket (port
> >>8080) should bind, to 127.6.26.129. How do I set this IP in
> >>PicoLisp?
> ...
> At the moment, modifying "src64/net.l" sounds like the easiest way
> to get a web app running on Cloud9. However, I'm not familiar with
> the (assembly) language used in that file. Do you have any idea of
> how a tweek to that file would look?

Hmm, just an _idea_. I'm absolutely unsure whether I'm on the right
track with that. No guarantee! :)

My guess is:


1. Put the line

   : MyIpAddr asciz "127.6.26.129"

   somehere into "src64/net.l", e.g. before or after 'doPort'.

2. Change line 36 of "src64/net.l"

  mset (Addr SIN6_ADDR) 16  # "::" (16 null-bytes)

   to

  cc inet_pton(AF_INET6 MyIpAddr &(Addr SIN6_ADDR))

Does this work?

♪♫ Alex
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Re: How to set IP address for socket?

[Jon Kleiser]

Hi Alex,

On 13-05-13 13:43 , Alexander Burger wrote:

Hi Jon,


Cloud9 IDE Support, I have to set the IP to which the socket (port
8080) should bind, to 127.6.26.129. How do I set this IP in
PicoLisp?

Though I'm not very knowledgeable about those network issues, I'm afraid
this is not directly possible.

The Lisp-level 'port' function, which does the 'bind'ing internally, has
'in6addr_any' hard-coded. So you need to either modify "src64/net.l"
(around line 36), or do the whole binding in a separate 'native'
function call.

Any other idea (e.g. some proxy)?

♪♫ Alex


At the moment, modifying "src64/net.l" sounds like the easiest way to 
get a web app running on Cloud9. However, I'm not familiar with the 
(assembly) language used in that file. Do you have any idea of how a 
tweek to that file would look?


/Jon
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Re: How to set IP address for socket?

[Jon Kleiser]

Hi Herman,

On 13-05-13 14:29 , Tamas Herman wrote:

hey jon,

i haven't had a look at c9 for over a year now, so i checked on it
today and i see they give a full shell in some kind of chroot on their
own servers, then u can deploy to heroku too and finally they can even
collaborate thru your own servers via ssh.

just out of curiosity, how do u run picolisp on c9?



This far, I've only done, in the C9 Terminal, exactly the same as I do 
on my Mac, except on C9 I use 64-bit PicoLisp. To be able to access my 
toy web app from the outside, however, I'll probably have to "set the IP 
to which the socket should bind", to 127.6.26.129. That's what they do 
in their node.js example ...
http.createServer(...).listen(process.env.PORT, process.env.IP);  // the 
IP env. variable is (normally) 127.6.26.129.


I'll see if I can manage something similar in PicoLisp ... ;-)

/Jon
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Re: How to set IP address for socket?

[Tamas Herman]

hey jon,

i haven't had a look at c9 for over a year now, so i checked on it
today and i see they give a full shell in some kind of chroot on their
own servers, then u can deploy to heroku too and finally they can even
collaborate thru your own servers via ssh.

just out of curiosity, how do u run picolisp on c9?

-- 
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Re: How to set IP address for socket?

[Alexander Burger]

Hi Jon,

> Cloud9 IDE Support, I have to set the IP to which the socket (port
> 8080) should bind, to 127.6.26.129. How do I set this IP in
> PicoLisp?

Though I'm not very knowledgeable about those network issues, I'm afraid
this is not directly possible.

The Lisp-level 'port' function, which does the 'bind'ing internally, has
'in6addr_any' hard-coded. So you need to either modify "src64/net.l"
(around line 36), or do the whole binding in a separate 'native'
function call.

Any other idea (e.g. some proxy)?

♪♫ Alex
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How to set IP address for socket?

[Jon Kleiser]

Hi,

I have tried to run a tiny PicoLisp based web application on the Cloud9 
IDE (c9.io). PicoLisp itself (64-bit) runs fine, but I couldn't connect 
to my web app from outside Cloud9. According to Cloud9 IDE Support, I 
have to set the IP to which the socket (port 8080) should bind, to 
127.6.26.129. How do I set this IP in PicoLisp?


/Jon
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