[squeak-dev] Closing a socket for port re-use - dumb question
John M McIntosh
johnmci at smalltalkconsulting.com
Sat Mar 1 02:14:24 UTC 2008
The unix like systems support these items, subject of much debate a
few years back.
static socketOption socketOptions[]= {
{ "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
On Feb 29, 2008, at 4:38 PM, Bill Schwab wrote:
> Andreas, Randal,
>
> =====================================
> Randal wrote:
>
> Not sure in the windows world, but by design, sockets closed are held
> closed for two minutes in case late packets arrive. If you don't care
> about that you can set "socket reuse" on the socket before you close
> it.
> *---------------------------------------------------------------------
>
> By that, do you mean something like "socket setOption:
> 'SO_REUSEADDR' value: true." that I just found in the image? There
> is also an SO_REUSEPORT which is probably more what I want. I will
> read up on them shortly.
>
> Of course, there is Andreas' example which appears to suggest that
> there is no problem. All I remember is that I had problems, got
> conflicting advice, and ultimately found ephemeral ports solved my
> immediate (at the time) problem at the expense of some work and
> firewall hassles. I suspect the reuse options are the answer.
>
> Thanks for the pointers!!!
>
> Bill
>
>
>
>
> Wilhelm K. Schwab, Ph.D.
> University of Florida
> Department of Anesthesiology
> PO Box 100254
> Gainesville, FL 32610-0254
>
> Email: bschwab at anest.ufl.edu
> Tel: (352) 846-1285
> FAX: (352) 392-7029
>
>
>
--
=
=
=
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John M. McIntosh <johnmci at smalltalkconsulting.com>
Corporate Smalltalk Consulting Ltd. http://www.smalltalkconsulting.com
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