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[204.195.120.218]) by smtp.gmail.com with ESMTPSA id f12-20020a63f10c000000b00440416463fesm6213643pgi.27.2022.10.11.10.54.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 11 Oct 2022 10:54:02 -0700 (PDT) Date: Tue, 11 Oct 2022 10:54:00 -0700 From: Stephen Hemminger <stephen@networkplumber.org> To: Ferruh Yigit <ferruh.yigit@amd.com> Cc: dev@dpdk.org Subject: Re: [RFC] net: add experimental UDP encapsulation PMD Message-ID: <20221011105400.518aa1c2@hermes.local> In-Reply-To: <adc88cd3-1b2f-5333-ee03-637696068d5f@amd.com> References: <20221011001016.173447-1-stephen@networkplumber.org> <adc88cd3-1b2f-5333-ee03-637696068d5f@amd.com> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions <dev.dpdk.org> List-Unsubscribe: <https://mails.dpdk.org/options/dev>, <mailto:dev-request@dpdk.org?subject=unsubscribe> List-Archive: <http://mails.dpdk.org/archives/dev/> List-Post: <mailto:dev@dpdk.org> List-Help: <mailto:dev-request@dpdk.org?subject=help> List-Subscribe: <https://mails.dpdk.org/listinfo/dev>, <mailto:dev-request@dpdk.org?subject=subscribe> Errors-To: dev-bounces@dpdk.org On Tue, 11 Oct 2022 17:18:26 +0100 Ferruh Yigit <ferruh.yigit@amd.com> wrote: > On 10/11/2022 1:10 AM, Stephen Hemminger wrote: > > This is a new PMD which can be useful to test a DPDK application > > from another test program. The PMD binds to a connected UDP socket > > and expects to receive and send raw Ethernet packets over that > > socket. > > > > Why is the 'connected UDP socket' requirement? I guess this maps with > 'SO_REUSEPORT' in the code. > > > This is especially useful for testing envirionments where you > > can't/don't want to give the test driver program route permission. > > > > Signed-off-by: Stephen Hemminger<stephen@networkplumber.org> > > --- > > This is 1st draft port of some test infrastructure to get > > feedback and comments from community. > > > > Later version will include an example and unit tests. > > I think pcap PMD can be used for similar testing purposed, but we can > have UDP PMD too, it may open other possibilities as a method to > communicate with other non-dpdk applications. > > Although this is draft I will put some comments in other thread for next > version. Our use case was unique. We are testing application running in QEMU on Windows and the test driver is a Windows application. The Windows application interacts with DPDK inside QEMU over UDP. For example, test driver builds a packet and sends it to the DPDK appliance and expects a given result: rewrite, drop, etc.