ESP8266: prevent WOULD BLOCK from TX if UDP #9331
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added 2 commits
January 10, 2019 14:33
With TCP it's desirable that SIGIO wakes up the application to check if there is buffer space space available on the mode. With UDP the behavior is not acceptable as we don't know if the other endpoint is there as connection establishment is missing. Hence buffers might stay full forever.
ciarmcom
requested review from
kjbracey,
michalpasztamobica,
SeppoTakalo and
a team
|
@VeijoPesonen, thank you for your changes. |
| _global_event_queue->call_in(100, callback(this, &ESP8266Interface::event)); | ||
| } else if (status == NSAPI_ERROR_WOULD_BLOCK && socket->proto == NSAPI_UDP) { | ||
| status = NSAPI_ERROR_DEVICE_ERROR; |
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Why do we need to modify the NSAPI_ERROR_WOULD_BLOCK to become NSAPI_ERROR_DEVICE_ERROR?
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I think because UDP sending should never fail.
SeppoTakalo
approved these changes
Jan 10, 2019
|
@0xc0170 would you please review. |
michalpasztamobica
approved these changes
Jan 16, 2019
0xc0170
approved these changes
Jan 16, 2019
|
CI started |
Test run: SUCCESSSummary: 11 of 11 test jobs passed |
0xc0170
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Description
[ESP8266] Drop signalling SIGIO artificially if UDP send fails
With TCP it's desirable that SIGIO wakes up the application to check
if there is buffer space available on the mode. With UDP the
behavior is not acceptable as we don't know if the other endpoint is
there as connection establishment is missing. Hence buffers might
stay full forever.
Fix a debug print
Pull request type
Reviewers
@kjbracey-arm
@SeppoTakalo
@michalpasztamobica