Hi All, About a week ago I asked what to do when select (LwIP 1.41) does not return…
Well, after investigating we found out that the problem is due to how getaadrinfo function in LwIP 1.41 was implemented. The older code did not handle the hints param properly. As a result when IP address was NULL, it caused the socket to be assigned to local loop-back and as a result a connection was seems to fail. I have changed my test bench and upgraded to LwIP 2.02 With 2.02 everything now works as expected. Thanks again to everyone doing a great work on LwIP... BR, Noam. From: lwip-users [mailto:lwip-users-bounces+noam=silrd....@nongnu.org] On Behalf Of Noam Weissman Sent: Wednesday, May 31, 2017 7:38 PM To: Mailing list for lwIP users Subject: Re: [lwip-users] LwIP 1.41 select does not return ? Hi Arpit, I am not sure I need to check. I know that the code uses something called virtual file system for devices that do not have a file system. Maybe you have a point there 😊... I will check that, thanks. when I commented the call to select and left to code to block on accept it also did not return when a connection was made. In general a server code: create socket, set options, bind, listen, accept They do about the same but for some reason their code hangs ?.. so it should be something else related to the porting or file system as you mentioned. Thanks for everyone that made notes... BR, Noam. ________________________________ From: lwip-users <lwip-users-bounces+noam=silrd....@nongnu.org<mailto:lwip-users-bounces+noam=silrd....@nongnu.org>> on behalf of Arpit Agarwal <arpi...@alumni.iitg.ernet.in<mailto:arpi...@alumni.iitg.ernet.in>> Sent: Wednesday, May 31, 2017 6:33 PM To: Mailing list for lwIP users Subject: Re: [lwip-users] LwIP 1.41 select does not return ? Hi Noam, Just to clarify another thing, is the environment where you are trying to use lwip_select also uses select for file descriptors ? If yes then there is a possibility of malfunctioning as if I am not wrong lwip_select is not meant to be used with file descriptors as opposed normal BSD style select which is normally meant for both file and socket descriptors. I used to face similar problems when porting lwip to an RTOS with POSIX compliance / BSD-style API support. If this is not the case, then probably I have no clue what might be causing this malfunctioning as I don't have the code and environment you are using. -- Thanks & Regards, ARPIT AGARWAL Alumni, Department Of CSE IIT Guwahati-781039 (INDIA) M: (+91)-8792793063 E: arpi...@alumni.iitg.ernet.in<mailto:arpi...@alumni.iitg.ernet.in> arpit0...@gmail.com<mailto:arpit0...@gmail.com> ----------------------------------------------------------------------------------------- “ The greater part of progress is the desire to progress. ” — Seneca ________________________________ From: lwip-users <lwip-users-bounces+arpit.a=alumni.iitg.ernet...@nongnu.org<mailto:lwip-users-bounces+arpit.a=alumni.iitg.ernet...@nongnu.org>> on behalf of Noam Weissman <n...@silrd.com<mailto:n...@silrd.com>> Sent: Wednesday, May 31, 2017 8:44 PM To: Mailing list for lwIP users Subject: Re: [lwip-users] LwIP 1.41 select does not return ? Thanks I will check that tomorrow :-) ________________________________ From: lwip-users <lwip-users-bounces+noam=silrd....@nongnu.org<mailto:lwip-users-bounces+noam=silrd....@nongnu.org>> on behalf of goldsimon <goldsi...@gmx.de<mailto:goldsi...@gmx.de>> Sent: Wednesday, May 31, 2017 5:53 PM To: Mailing list for lwIP users Subject: Re: [lwip-users] LwIP 1.41 select does not return ? Noam Weissman: >Were is the semaphore released ? In "event_callback()", if I remember correctly. Simon _______________________________________________ lwip-users mailing list lwip-users@nongnu.org<mailto:lwip-users@nongnu.org> https://lists.nongnu.org/mailman/listinfo/lwip-users lwip-users Info Page - non-GNU<https://lists.nongnu.org/mailman/listinfo/lwip-users> lists.nongnu.org Welcome to the lwip-users mailing list. Use it to ask questions, share your experience and discuss new ideas. To see the collection of prior postings to the list ...
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