2009/11/3 Schwab,Wilhelm K <bschwab@anest.ufl.edu>

John,

�

By crash, I mean pretty much the standard thing: one instant, Pharo is running, click something on the inspector, and suddenly Pharo is gone.� Not good.

�

Bill

�

From: pharo-project-bounces@lists.gforge.inria.fr [mailto:pharo-project-bounces@lists.gforge.inria.fr] On Behalf Of John McIntosh
Sent: Monday, November 02, 2009 9:43 PM
To: Pharo-project@lists.gforge.inria.fr
Subject: Re: [Pharo-project] Server sockets, ephermal ports, and a Linux VM crash

On Mon, Nov 2, 2009 at 5:52 PM, Igor Stasenko <siguctua@gmail.com> wrote:

2009/11/2 Schwab,Wilhelm K <bschwab@anest.ufl.edu>:

> A nice trick is to use "ephmeral" ports, which is a fancy way of saying to pass zero for the listening port and let the OS assign a port.

OS-X assigns you the range�49152-65535

�

�As for the getOption, the values for the key and the results is platform specific, and likely operating system version specific too. However for platforms that use BSD sockets, ala (Unix/Linux/OS-X) then the keys are in this table. Obviously if you fiddle with them then you know what you are doing?�

��{ "SO_DEBUG", SOL_SOCKET, SO_DEBUG },

� { "SO_REUSEADDR", SOL_SOCKET, SO_REUSEADDR },

� { "SO_DONTROUTE", SOL_SOCKET, SO_DONTROUTE },

� { "SO_BROADCAST", SOL_SOCKET, SO_BROADCAST },

� { "SO_SNDBUF", SOL_SOCKET, SO_SNDBUF },

� { "SO_RCVBUF", SOL_SOCKET, SO_RCVBUF },

� { "SO_KEEPALIVE", SOL_SOCKET, SO_KEEPALIVE },

� { "SO_OOBINLINE", SOL_SOCKET, SO_OOBINLINE },

� { "SO_LINGER", SOL_SOCKET, SO_LINGER },

� { "IP_TTL", SOL_IP, IP_TTL },

� { "IP_HDRINCL", SOL_IP, IP_HDRINCL },

� { "IP_MULTICAST_IF", SOL_IP, IP_MULTICAST_IF },

� { "IP_MULTICAST_TTL", SOL_IP, IP_MULTICAST_TTL },

� { "IP_MULTICAST_LOOP", SOL_IP, IP_MULTICAST_LOOP },

#ifdef IP_ADD_MEMBERSHIP

� { "IP_ADD_MEMBERSHIP", SOL_IP, IP_ADD_MEMBERSHIP },

� { "IP_DROP_MEMBERSHIP", SOL_IP, IP_DROP_MEMBERSHIP },

#endif

� { "TCP_MAXSEG", SOL_TCP, TCP_MAXSEG },

� { "TCP_NODELAY", SOL_TCP, TCP_NODELAY },

#ifdef SO_REUSEPORT

� { "SO_REUSEPORT", SOL_SOCKET, SO_REUSEPORT },

#endif

�I created a TcpService on port zero, the listening socket gets a port and all seems reasonably well until I later inspect a few aspects of the TcpService, at which point the vm crashes.
>
> Bill

More details required about the crashes? Whatever crashes mean. �

--
===========================================================================
John M. McIntosh <johnmci@smalltalkconsulting.com>
Corporate Smalltalk Consulting Ltd. �http://www.smalltalkconsulting.com
===========================================================================

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