[swift-corelibs-dev] Cannot call CFStreamCreatePairWithSocket on Linux

[Tony Parker]

Hi Pushkar,

Yes, this is used by “getStreamsToHostWithName”. I think we’ll have to come up with a replacement implementation here, either by starting with the old CFNetwork open source code or writing our own.

- Tony

> On Mar 15, 2016, at 8:00 AM, Pushkar N Kulkarni via swift-corelibs-dev <swift-corelibs-dev at swift.org> wrote:
> 
> Just to add to that:
> 
> I am wondering if this would hamper the implementation of NSStream, NSInputStream and NSOutputStream for Linux.
> 
> Pushkar N Kulkarni,
> IBM Runtimes
> 
> Simplicity is prerequisite for reliability - Edsger W. Dijkstra
> 
> 
> 
> -----Pushkar N Kulkarni/India/IBM wrote: -----
> To: swift-corelibs-dev at swift.org <mailto:swift-corelibs-dev at swift.org>
> From: Pushkar N Kulkarni/India/IBM
> Date: 03/15/2016 08:24PM
> Subject: Cannot call CFStreamCreatePairWithSocket on Linux
> 
> 
> Hello all, 
> 
>  While attempting a simple Swift client-server program on Linux using CFSocket, I tried to create CFReadStream and CFWriteStream instances using CFStreamCreatePairWithSocket(_:_:_:_). The program compiles and links but it crashes with this:
> 
> 2016-03-15 10:30:17.791 Client[21389:5a501740] CoreFoundation: failed to dynamically link symbol _CFSocketStreamCreatePair
> 
> 2016-03-15 10:30:17.791 Client[21389:5a501740] CoreFoundation: failed to dynamically link symbol _CFErrorCreateWithStreamError
> 
> 2016-03-15 10:30:17.791 Client[21389:5a501740] CoreFoundation: failed to dynamically link symbol _CFStreamErrorFromCFError
> 
> 
> 
> 
> 
> I see that these symbols are dynamically linked from CFNetwork which, I guess, doesn't exist on Linux (so there is no lookup for these symbols on Linux). 
> 
> Does this qualify to be a CFStream limitation on Linux?
> 
> Thanks in advance for your time!
> 
> Pushkar N Kulkarni,
> IBM Runtimes
> 
> Simplicity is prerequisite for reliability - Edsger W. Dijkstra
> 
> 
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