1、as root, install the rpm(vpp-selinux, vpp-lib, vpp-18.04, vpp-plugins),
start service vpp and I come into vppctl.
2、I copy test/ext/vapi_c_test.c to main.c(a new file, a new dir).
compile using: gcc -std=gnu99 -g -Wall -pthread -I/usr/include/
-lvppinfra -lvlibmemoryclient -lsvm -lpthread -lcheck -lrt -lm -lvapiclient
-lsubunit main.c -o test
3、then, #./test
But it shows vl_map_shmem:639: region init fail
wangchuan...@163.com
From: Ole Troan
Date: 2018-09-13 21:44
To: wangchuan...@163.com
CC: Klement Sekera -X (ksekera - PANTHEON TECHNOLOGIES at Cisco); Dave Barach
(dbarach); vpp-dev
Subject: Re: [vpp-dev] VPP's C-type-api example
> i am be root
Then you must provide more details.
Cheers,
Ole
>
> wangchuan...@163.com
>
> From: Ole Troan
> Date: 2018-09-13 21:26
> To: wangchuan...@163.com
> CC: Klement Sekera -X (ksekera - PANTHEON TECHNOLOGIES at Cisco); Dave Barach
> (dbarach); vpp-dev
> Subject: Re: [vpp-dev] VPP's C-type-api example
> > But I got some error when using vapi - vapi_connect as " vl_map_shmem:639:
> > region init fail “.
>
> Permission error?
> Run client as root, or configure VPP to set permissions on API shared memory.
>
> In VPP startup:
> api-segment { uid <foo> gid <foo> }
>
> Cheers,
> Ole
>
> > And my mem : MemFree: 220036 kB | HugePages_Total:
> > 679 | HugePages_Free: 627
> > Help please!
> >
> > My code:
> > int main()
> > {
> > vapi_ctx_t ctx;
> > vapi_error_e rv = vapi_ctx_alloc (&ctx);
> > vapi_msg_show_version *sv = vapi_alloc_show_version (ctx);
> > rv = vapi_connect (ctx, app_name, api_prefix, max_outstanding_requests,
> > response_queue_size, VAPI_MODE_BLOCKING);
> > rv = vapi_send (ctx, sv);
> > vapi_msg_show_version_reply *reply;
> > rv = vapi_recv (ctx, (void **) &reply, NULL, 0, 0);
> > if(reply != NULL)
> > printf("ret[%d] program[%s] version[%s] \n build_date[%s]
> > build_directory[%s]\n", reply->payload.retval, reply->payload.program,
> > reply->payload.version, reply->payload.build_date,
> > reply->payload.build_directory);
> > else
> > printf("show version return none\n");
> > rv = vapi_disconnect (ctx);
> > vapi_ctx_free (ctx);
> > printf("end\n");
> > return 0;
> > }
> >
> > wangchuan...@163.com
> >
> > From: Klement Sekera
> > Date: 2018-09-13 17:02
> > To: Ole Troan; wangchuanguo
> > CC: Dave Barach (dbarach); vpp-dev
> > Subject: Re: [vpp-dev] VPP's C-type-api example
> > You can also check out the test/ext directory for vapi_c_test.c and
> > vapi_cpp_test.cpp, which are unittests for these bindings and there is
> > also an example of _dump API call.
> >
> > Regards,
> > Klement
> >
> > Quoting Ole Troan (2018-09-13 09:33:14)
> > > Hi again,
> > >
> > > > I am in the beginning of using-c-api. Should I not follow
> > > > (src/vpp-api/client) ?
> > > > Can you please show me a fun-name and a example of the higher level C
> > > > API?
> > >
> > > That’s right, I wouldn’t recommend using the src/vpp-aoi/client API
> > > unless you are building a new language binding.
> > >
> > > If you need a C interface you should use VAPI.
> > >
> > > See interface.api.vapi.h (auto-generated) for sw_interface_dump()
> > >
> > > static inline vapi_error_e vapi_sw_interface_dump(struct vapi_ctx_s *ctx,
> > > vapi_msg_sw_interface_dump *msg,
> > > vapi_error_e (*callback)(struct vapi_ctx_s *ctx,
> > > void *callback_ctx,
> > > vapi_error_e rv,
> > > bool is_last,
> > > vapi_payload_sw_interface_details *reply),
> > > void *callback_ctx)
> > >
> > >
> > > src/vpp-api/vapi/vapi_doc.md for documentation.
> > >
> > > To get a feel of how the API works, at even higher level you can play
> > > with the Python language binding.
> > >
> > > Best regards,
> > > Ole
> > >
> > >
> > >
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