Re: [Pharo-project] Socket listenOn: 0 accept
Sven Van Caekenberghe wrote Most socket API's allow for the creation of a server socket on the next available port, often by specifying 0 instead of a port. When the socket is bound, one can retrieve the local port and let the client(s) know. I tried to do that in Pharo today, and these steps seem to work, by accepting an incoming connection gives a primitive failed. socket listenOn: 0. I would say that: socket listen. would be nicer interface than giving special meaning to number 0 in this context. Davorin Rusevljan - http://www.cloud208.com/ -- View this message in context: http://forum.world.st/Socket-listenOn-0-accept-tp4459813p4477991.html Sent from the Pharo Smalltalk mailing list archive at Nabble.com.
Re: [Pharo-project] Socket listenOn: 0 accept
Can anyone please help me and show me where I should look if I wanted to see the exact C code implementing the socket primitives (for the Pharo built Cog VMs) ? On 09 Mar 2012, at 16:44, Sven Van Caekenberghe wrote: Most socket API's allow for the creation of a server socket on the next available port, often by specifying 0 instead of a port. When the socket is bound, one can retrieve the local port and let the client(s) know. I tried to do that in Pharo today, and these steps seem to work, by accepting an incoming connection gives a primitive failed. Anyone tried this ? | socket | socket := Socket newTCP. socket listenOn: 0. [ [ Transcript crShow: 'Port is ', socket localPort printString. (socket waitForAcceptFor: 60) ifNotNil: [ :client | | data | data := client receiveDataTimeout: 30. Transcript crShow: 'Received ', data asString. data ifNotNil: [ client sendData: data reverse; close ] ]. ] ensure: [ socket close ] ] fork. I am running the Pharo Cog VM on Mac OS X using Pharo 1.4. Thx, Sven smime.p7s Description: S/MIME cryptographic signature
Re: [Pharo-project] Socket listenOn: 0 accept
On Tue, Mar 13, 2012 at 4:43 AM, Sven Van Caekenberghe s...@beta9.bewrote:
Can anyone please help me and show me where I should look if I wanted to
see the exact C code implementing the socket primitives (for the Pharo
built Cog VMs) ?
In trunk (and in my Cog vm source) they are in the directories
http://squeakvm.org/svn/squeak/trunk/platforms/{Cross,MacOS,unix,win32}/plugins/SocketPlugin
i.e. in all VMs locate the relevant platforms hierarchy and look
in platforms/{Cross,Mac OS,unix,win32}/plugins/SocketPlugin.
On 09 Mar 2012, at 16:44, Sven Van Caekenberghe wrote:
Most socket API's allow for the creation of a server socket on the next
available port, often by specifying 0 instead of a port. When the socket is
bound, one can retrieve the local port and let the client(s) know. I tried
to do that in Pharo today, and these steps seem to work, by accepting an
incoming connection gives a primitive failed.
Anyone tried this ?
| socket |
socket := Socket newTCP.
socket listenOn: 0.
[ [
Transcript crShow: 'Port is ', socket localPort printString.
(socket waitForAcceptFor: 60)
ifNotNil: [ :client | | data |
data := client receiveDataTimeout: 30.
Transcript crShow: 'Received ', data asString.
data ifNotNil: [ client sendData: data reverse;
close ]
].
] ensure: [ socket close ] ] fork.
I am running the Pharo Cog VM on Mac OS X using Pharo 1.4.
Thx,
Sven
--
best,
Eliot
Re: [Pharo-project] Socket listenOn: 0 accept
On 15 Mar 2012, at 18:58, Eliot Miranda wrote:
In trunk (and in my Cog vm source) they are in the directories
http://squeakvm.org/svn/squeak/trunk/platforms/{Cross,Mac
OS,unix,win32}/plugins/SocketPlugin
i.e. in all VMs locate the relevant platforms hierarchy and look in
platforms/{Cross,Mac OS,unix,win32}/plugins/SocketPlugin.
Thank you, Eliot.
Sven
On 09 Mar 2012, at 16:44, Sven Van Caekenberghe wrote:
Most socket API's allow for the creation of a server socket on the next
available port, often by specifying 0 instead of a port. When the socket is
bound, one can retrieve the local port and let the client(s) know. I tried
to do that in Pharo today, and these steps seem to work, by accepting an
incoming connection gives a primitive failed.
Anyone tried this ?
| socket |
socket := Socket newTCP.
socket listenOn: 0.
[ [
Transcript crShow: 'Port is ', socket localPort printString.
(socket waitForAcceptFor: 60)
ifNotNil: [ :client | | data |
data := client receiveDataTimeout: 30.
Transcript crShow: 'Received ', data asString.
data ifNotNil: [ client sendData: data reverse; close
]
].
] ensure: [ socket close ] ] fork.
I am running the Pharo Cog VM on Mac OS X using Pharo 1.4.
Thx,
Sven
smime.p7s
Description: S/MIME cryptographic signature
Re: [Pharo-project] Socket listenOn: 0 accept
On 03/09/2012 04:44 PM, Sven Van Caekenberghe wrote: Most socket API's allow for the creation of a server socket on the next available port, often by specifying 0 instead of a port. When the socket is bound, one can retrieve the local port and let the client(s) know. I tried to do that in Pharo today, and these steps seem to work, by accepting an incoming connection gives a primitive failed. Stupid n00b question, isn't 0 a valid port number? Cheers Philippe
Re: [Pharo-project] Socket listenOn: 0 accept
On 09 Mar 2012, at 16:56, Philippe Marschall wrote: On 03/09/2012 04:44 PM, Sven Van Caekenberghe wrote: Most socket API's allow for the creation of a server socket on the next available port, often by specifying 0 instead of a port. When the socket is bound, one can retrieve the local port and let the client(s) know. I tried to do that in Pharo today, and these steps seem to work, by accepting an incoming connection gives a primitive failed. Stupid n00b question, isn't 0 a valid port number? I don't think so, in Java: http://docs.oracle.com/javase/1.4.2/docs/api/java/net/ServerSocket.html#ServerSocket() ServerSocket public ServerSocket (int port) throws IOException Creates a server socket, bound to the specified port. A port of 0 creates a socket on any free port. […] smime.p7s Description: S/MIME cryptographic signature
Re: [Pharo-project] Socket listenOn: 0 accept
Am 09.03.2012 um 18:44 schrieb Sven Van Caekenberghe: On 09 Mar 2012, at 16:56, Philippe Marschall wrote: On 03/09/2012 04:44 PM, Sven Van Caekenberghe wrote: Most socket API's allow for the creation of a server socket on the next available port, often by specifying 0 instead of a port. When the socket is bound, one can retrieve the local port and let the client(s) know. I tried to do that in Pharo today, and these steps seem to work, by accepting an incoming connection gives a primitive failed. Stupid n00b question, isn't 0 a valid port number? I don't think so, in Java: http://docs.oracle.com/javase/1.4.2/docs/api/java/net/ServerSocket.html#ServerSocket() ServerSocket public ServerSocket (int port) throws IOException Creates a server socket, bound to the specified port. A port of 0 creates a socket on any free port. Well, I think it is sort of a definition thing. From the protocol perspective 0 is a valid port number in the priviledged segment (0-1023). But reservation of services is done via IANA and there port 0 is reserved for UDP and TCP. For your own services you usually wouldn't choose a reserved port numbe like 80,22,etc. That makes 0 kind of free for intermediate use :) Norbert
