[S] Change in libosmo-netif[master]: stream: Fix endless loop on server on client disconnect

Attention is currently required from: laforge. arehbein has posted comments on this change. ( https://gerrit.osmocom.org/c/libosmo-netif/+/33196 ) Change subject: stream: Fix endless loop on server on client disconnect ...................................................................... Patch Set 1: (1 comment) Commit Message: https://gerrit.osmocom.org/c/libosmo-netif/+/33196/comment/341dc159_f4f5abc0 PS1, Line 9: Not sure why, but select() keeps reporting read events it seems, : even though the client doesn't send any packets anymore. Looks like the code was originally designed with the idea to set the connection flag `OSMO_STREAM_SRV_F_FLUSH_DESTROY`, allow all messages to be sent and only then destroy the connection. So the server gets stuck, because the condition `if (osmo_iofd_txqueue_len(iofd) == 0)` is never met on subsequent iterations, i.e. the messages don't all get sent out for whatever reason. Is it actually possible, that the socket is `read()`-dead, but messages can still be sent out on the connection? If not, maybe we can simplify the code and do away with the condition check mentioned above, instead of destroying the connection on the next call to this function. -- To view, visit https://gerrit.osmocom.org/c/libosmo-netif/+/33196 To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: libosmo-netif Gerrit-Branch: master Gerrit-Change-Id: I012ddf14ae17642a52d34026d85ab6958cf488a1 Gerrit-Change-Number: 33196 Gerrit-PatchSet: 1 Gerrit-Owner: arehbein <arehbein(a)sysmocom.de> Gerrit-Reviewer: Jenkins Builder Gerrit-CC: laforge <laforge(a)osmocom.org> Gerrit-Attention: laforge <laforge(a)osmocom.org> Gerrit-Comment-Date: Thu, 08 Jun 2023 11:06:45 +0000 Gerrit-HasComments: Yes Gerrit-Has-Labels: No Comment-In-Reply-To: laforge <laforge(a)osmocom.org> Gerrit-MessageType: comment