Hi Venu, You’ll find documentation regarding the host stack in general and vcl in particular here [1] (see for instance [2]). As for code examples, check here [3] the vcl test client/server apps.
Regards, Florin [1] https://wiki.fd.io/view/VPP/HostStack <https://wiki.fd.io/view/VPP/HostStack> [2] https://wiki.fd.io/images/9/9c/Vpp-hoststack-kc-eu19.pdf <https://wiki.fd.io/images/9/9c/Vpp-hoststack-kc-eu19.pdf> [3] https://git.fd.io/vpp/tree/src/plugins/hs_apps/vcl <https://git.fd.io/vpp/tree/src/plugins/hs_apps/vcl> > On Dec 7, 2020, at 11:24 AM, Venumadhav Josyula <vjosy...@gmail.com> wrote: > > Hi Florin, > > This is nothing to do with the subject being discussed. > > Can you please direct me to the following > i) example(s) of VCL ? > ii) Any tutorial explaining the working of VCL ? > > Thanks & Regards, > Venu > > On Fri, 4 Dec 2020 at 01:28, Florin Coras <fcoras.li...@gmail.com > <mailto:fcoras.li...@gmail.com>> wrote: > Hi Ravi, > > VCL is not part of the vpp app/process, it’s a library that applications can > link against to be able to interact with the session layer in a more > posix-like manner. So if your app needs a binary api connection to vpp, it > needs to set it up independent of vcl. > > With regard to the “vpe-api” region, it’s worth nothing that the binary api > can work over two “transports”. Namely: > > 1) posix shared memory, and this is the one that relies on the vpe-api region > for bootstrapping and > 2) an af_unix socket which is configurable in startup.conf, i.e., by doing > something like socksvr { socket-name <filename> }. > > This is somewhat further complicated by the fact that a binary api connection > bootstrapped over a socket (option 2) can be switched to a shared memory > transport. Although similar to option1, in this case, the memory is allocated > and negotiated per binary api client using memfds and the socket. This is > what VCL uses underneath if configured to use the binary api with the socket > transport. > > Previously, VCL could also be configured to use option 1, but support for > this has been recently dropped. > > Regards, > Florin > >> On Dec 3, 2020, at 7:22 AM, RaviKiran Veldanda <ravi.jup...@gmail.com >> <mailto:ravi.jup...@gmail.com>> wrote: >> >> Hi Florin, >> Thanks for your response, however I have a question, If I want to use >> another Binary API initialization do we need to do at our Application or in >> VPP code. >> When I check VPP source code, the initialization always with "vpe-api" >> vpe_api_init calls always vl_set_memory_region_name ("/vpe-api"); so >> wondering do we have any other region present? >> >> FYI: We are using 20.05 stable version. >> Regards, >> Ravi. >> >> >> > > >
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