Sorry, I do not know how to write a client. There is no documents which i can
referece. I just know the steps which a client should have. But I do not know
which functions to use. I would appricate it if you can write a draf client. I
am studying....
Yes, for study, I add some event apis int snat.
------------------ ???????? ------------------
??????: "Klement Sekera -X (ksekera - PA";<ksek...@cisco.com>;
????????: 2017??9??28??(??????) ????4:02
??????: "????????"<15803846...@qq.com>;
????: "vpp-dev"<vpp-dev@lists.fd.io>; "Keith Burns"<alaga...@gmail.com>;
????: Re: ?????? [vpp-dev] ?????? ?????? How to get interface stats using C
api?
Looking at your code it seems you're not waiting for the reply at all. I
don't have experience with VAT and I don't think this is the recommended
way to write a client. Nevertheless, looking at your code, I don't see
any attempt to wait for a response. You are sending a message to VPP,
but not waiting for the reply nor the event.
Also I see that you are referencing VL_API_SNAT_DECRYPT_EVENT but I
don't see such event anywhere. Is this something which you added, but is
not committed yet?
Quoting ???????? (2017-09-28 03:23:30)
> Thank you very much! After reading this email, I understand the calling
> event api process. But in the step 3, i do not know call which function
> and how to call? In the test/ext/vapi_c_test.c, i can not find the
> function proto which in using. Can you write a simple client which get
> stat event by C ? Thank you very much!
> ------------------ ???????? ------------------
> ??????: "Klement Sekera -X (ksekera - PANTHEON TECHNOLOGIES at
> Cisco)";<ksek...@cisco.com>;
> ????????: 2017??9??27??(??????) ????3:15
> ??????: "????????"<15803846...@qq.com>;"Keith Burns"<alaga...@gmail.com>;
> ????: "vpp-dev"<vpp-dev@lists.fd.io>;
> ????: Re: [vpp-dev] ?????? ?????? How to get interface stats using C api?
> There are new C and C++ APIs added recently to vpp source code along
> with test programs. You can take a look at test/ext/vapi_c_test.c and
> vapi_cpp_test.cpp. Functions receiving stats are named test_stats_XXX().
> These are there to verify that receiving events works. Functionally,
> these are the same, they just test different ways of doing stuff.
>
> At shared memory level it looks like this:
>
> 1.) client -> want_stats -> vpp
> 2.) vpp -> want_stats_reply -> client (confirms subscription)
> 3.) vpp -> <various stats messages> -> client (when timer fires)
>
> in step 3.), client needs to read the shared memory queue in the
> vpp->client direction (or use the appropriate XXX_read() function). Note
> that stats take a few seconds to arrive (the test programs require
> 10-15 seconds of runtime to get some stats).
>
> HTH,
> Klement
>
> Quoting ???????? (2017-09-27 04:55:29)
> > That is ok??
> > Now I am research calling the plugin apis by C. Especially how to
> call
> > the event apis. I would appreciate it if you can write a brief
> client.
> > ------------------ ???????? ------------------
> > ??????: "Keith Burns";<alaga...@gmail.com>;
> > ????????: 2017??9??27??(??????) ????10:47
> > ??????: "????????"<15803846...@qq.com>;
> > ????: "vpp-dev"<vpp-dev@lists.fd.io>;
> > ????: Re: ?????? [vpp-dev] How to get interface stats using C api?
> > Apologies,
> > It's a callback.
> > We probably need some decent literature written for how to consume
> the
> > various C, C++, Python and Lua APIs
> > If you have a preference for any of those languages I could write a
> brief
> > client program for you and start work on documenting this stuff.
> > On Sep 26, 2017 6:04 PM, "????????" <[1]15803846...@qq.com> wrote:
> >
> > Hi??
> > Thank you for your detail information. After reading this, i can
> > understand. But after calling "want_per_interface_simple_stats"
> with
> > enable_disable=1, num=1 and sw_ifs[4], i do not know how to receive
> this
> > stats. calling other function or variable? Can you tell me how to
> > receive stats in my c program?
> > Thanks??
> > ------------------ ???????? ------------------
> > ??????: "Keith Burns";<[2]alaga...@gmail.com>;
> > ????????: 2017??9??27??(??????) ????6:39
> > ??????: "??????
> > ??"<[3]15803846...@qq.com>;"vpp-dev"<[4]vpp-dev@lists.fd.io>;
> > ????: Re: [vpp-dev] How to get interface stats using C api?
> > Hi there,
> > As of 17.10 you can now register for statistics on a per interface
> > level.
> > You need the sw_if_index of the interface you want stats for, but
> the
> > calls are in
> > [5]https://git.fd.io/vpp/tree/src/vpp/stats/stats.api
> > but as an example:
> > Register:
> >
> > autoreply define want_per_interface_simple_stats
> > {
> > u32 client_index;
> > u32 context;
> > u32 enable_disable;
> > u32 pid;
> > u32 num;
> > u32 sw_ifs[num];
> >
> > };
> >
> > So calling "want_per_interface_simple_stats" with enable_disable=1,
> num=1 and sw_ifs[4] will give you
> >
> > interface_simple_stats every 10sec for sw_if_index=4.
> >
> > The content of "interface_simple_stats" looks like:
> >
> > /** \brief Simple per interface stats counters structure
> > @param count - number of elements in message
> > @param timestamp - u32 vlib timestamp for control plane
> > @param data[count] - vl_api_vnet_simple_counter_t
> >
> > */
> > manual_print manual_endian define vnet_per_interface_simple_counters
> > {
> > u32 count;
> > u32 timestamp;
> > vl_api_vnet_simple_counter_t data[count];
> > };
> >
> > Where each "vnet_simple_counter_t" looks like:
> >
> > [6]https://git.fd.io/vpp/tree/src/vnet/interface.api
> >
> > /** \brief Simple interface counter data type for
> vnet_interface_simple_counters
> > @param sw_if_index - interface indexes for counters
> > @param drop - RX or TX drops due to buffer starvation
> > @param punt - used with VNET "punt" disposition
> > @param rx_ip4 - received IP4 packets
> > @param rx_ip6 - received IP6 packets
> > @param rx_no_buffer - no RX buffers available
> > @param rx_miss - receive misses
> > @param rx_error - receive errors
> > @param tx_error - transmit errors
> > @param rx_mpls - received MPLS packet
> >
> > */
> > typeonly manual_print manual_endian define vnet_simple_counter
> > {
> > u32 sw_if_index;
> > u64 drop;
> > u64 punt;
> > u64 rx_ip4;
> > u64 rx_ip6;
> > u64 rx_no_buffer;
> > u64 rx_miss;
> > u64 rx_error;
> > u64 tx_error;
> > u64 rx_mpls;
> > };
> >
> > So you will get back an array of counter structs for each sw_if_index
> you registered for.
> >
> > At the moment the impl sends on sw_if_index per reply but that is going
> to change so that for each client we send as much in one message as
> possible.
> >
> > On Tue, Sep 26, 2017 at 4:50 AM ???????? <[7]15803846...@qq.com>
> wrote:
> >
> > Hi, everyone!
> > How to get interface stats using C api?
> > For example, I want to know "GigabitEthernete/0/1" rx packets , what
> should I do?
> >
> > Thanks
> >
> > _______________________________________________
> > vpp-dev mailing list
> > [8]vpp-dev@lists.fd.io
> > [9]https://lists.fd.io/mailman/listinfo/vpp-dev
> >
> > References
> >
> > Visible links
> > 1. mailto:15803846...@qq.com
> > 2. mailto:alaga...@gmail.com
> > 3. mailto:15803846...@qq.com
> > 4. mailto:vpp-dev@lists.fd.io
> > 5. https://git.fd.io/vpp/tree/src/vpp/stats/stats.api
> > 6. https://git.fd.io/vpp/tree/src/vnet/interface.api
> > 7. mailto:15803846...@qq.com
> > 8. mailto:vpp-dev@lists.fd.io
> > 9. https://lists.fd.io/mailman/listinfo/vpp-dev_______________________________________________
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