Re: [vpp-dev] User Applications on VPP

Hi Satish, You can set environment variables within the context of the command that you are executing as opposed to exporting them for the whole system. If you try running nginx as per the wiki page mentioned previously, you should be able to confirm LD_PRELOAD is not globally set after you

Re: [vpp-dev] User Applications on VPP

Hi Florin, Thank you for clarifying. You said that when the LD_PRELOAD env variable is set just before I start the application then only that application syscalls are intercepted. Can you explain how is that mapping is done ( To determine which application socket API needs to be intercepted) ?

Re: [vpp-dev] User Applications on VPP

Hi Satish, If the LD_PRELOAD env variable is only set when starting the application, only that application’s syscalls are intercepted. Also note that we don’t intercept all syscalls (check ldp.c for more details). So yes, the architecture in your diagram should be possible. Regards, Florin

Re: [vpp-dev] VCL app with multiple TCP sessions handling in single worker

Hi Sastry, VCL is a library applications link against to consume the session layer in vpp via apis that are posix-like. So vcl is executed within the application’s context. As for data exchanges between vcl and vpp, those are done without a worker barrier. Regards, Florin > On Jul 22,

Re: [vpp-dev] User Applications on VPP

Hi Satish, You can find an example of how to use Nginx with LDP here [1]. In general you can find host stack documentation here [2]. Regards, Florin [1] https://wiki.fd.io/view/VPP/HostStack/LDP/nginx [2] https://wiki.fd.io/view/VPP/HostStack > On Jul 22, 2021, at 7:27 AM, satish amara

[vpp-dev] User Applications on VPP

Hi, I see we have a couple of options for user applications to use the VPP TCP/IP stack. Either by VCL or LD_PRELOAD. I am trying to understand if we can selectively intercept syscalls and injects them into VLS for specific applications. Is LD_PRELOAD can application specific. If so what is the

Re: [vpp-dev] Having trouble disabling optimization

>From the root of your workspace, “make build” will generate -g -o0 binaries… > On Jul 22, 2021, at 8:56 AM, Ivaylo Handjiiski wrote: > >  > Hello, > > I am trying to debug the VPP code using gdb but when I am examining or > printing variables most of them are . > > I've built vpp with -O0

[vpp-dev] Having trouble disabling optimization

Hello, I am trying to debug the VPP code using gdb but when I am examining or printing variables most of them are . I've built vpp with -O0 flags. I am using a vagrant vm as a building environment and my build process is as follows: make TAG=vpp_debug install-dep make TAG=vpp_debug pkg-deb

Re: [vpp-dev] VCL app with multiple TCP sessions handling in single worker

Hi Florin, Is it that VCL is going to be executed in the context of main thread as its being connected to VPP main. Do you see any issue with thread barrier if I send huge data? I know it is going to impact. With Regards Sastry -=-=-=-=-=-=-=-=-=-=-=- Links: You receive all messages sent to

Re: [vpp-dev] #vpp-dev : How does the ping works from vppctl when we have 2 entries for the same Dest Addr with different sw_if_index

Hi Neale and Alex, Thank you for the inputs and Yes, its due to entries in neighbor table. With Regards Sastry -=-=-=-=-=-=-=-=-=-=-=- Links: You receive all messages sent to this group. View/Reply Online (#19843): https://lists.fd.io/g/vpp-dev/message/19843 Mute This Topic: