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.