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

[Tony Parker via swift-corelibs-dev]

Hi Bouke,

There is currently no plan to open source the more modern versions of 
CFNetwork. We’ll have to replace its functionality in swift-corelibs-foundation.

- Tony

> On Oct 8, 2016, at 1:12 AM, Bouke Haarsma via swift-corelibs-dev 
>  wrote:
> 
> I'm running into the same issue as outlined in this post. Are there currently 
> any plans on bringing CFNetwork to swift-corelibs? 
> 
> On 2016-03-15 15:07:15 +, Philippe Hausler via swift-corelibs-dev said:
> 
> You are correct, those symbols are from CFNetwork which are not yet 
> implemented on linux targets. CFStream is implemented but CFSocketStream is 
> not implemented in swift-corelibs-foundation. It could be technically 
> reasonable to port the open source (very old) CFNetwork to linux. However I 
> am fairly certain that would take a bit of work to get up and running; 
> especially the Security framework portions.
> 
> On Mar 15, 2016, at 7:54 AM, Pushkar N Kulkarni via swift-corelibs-dev 
> > wrote:
> 
> 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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> 
> -- 
> -Bouke
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Re: [swift-corelibs-dev] Cannot call CFStreamCreatePairWithSocket on Linux

[Tony Parker via swift-corelibs-dev]

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 
>  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@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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