sorry，
That my carelessness. Whole cmd as root is : #./test "/my-api"
"my-api-test"
And vpp_api_test can connect to vpp.
wangchuan...@163.com
From: Ole Troan
Date: 2018-09-14 00:35
To: wangchuanguo
CC: Klement Sekera -X (ksekera - PANTHEON TECHNOLOGIES at Cisco); Dave Barach
(dbarach); vpp-dev
Subject: Re: [vpp-dev] VPP's C-type-api example
> 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
That’s an indication that it cannot connect to VPP.
Can vpp_api_test connect?
Cheers,
Ole
>
> 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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