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<a href="https://gitlab.rtems.org/yangn0">Ning Yang</a> created an issue: <a href="https://gitlab.rtems.org/rtems/pkg/rtems-lwip/-/issues/3">#3</a>
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<a href="#summary" aria-hidden="true" class="anchor" id="user-content-summary" style="margin-top: 0; float: left; margin-left: -20px; text-decoration: none; outline: none;"></a>Summary</h2>
<p dir="auto" style="color: #28272d; margin: 0 0 16px;" align="initial"><code style='font-size: 90%; color: #18171d; word-wrap: break-word; background-color: #ececef; border-radius: .25rem; margin-top: 0; font-weight: inherit; font-family: "GitLab Mono","JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; vertical-align: bottom; white-space: pre-wrap; overflow-wrap: break-word; word-break: keep-all; padding: 2px 4px;'>ttcp</code> seems to have some problems on <code style='font-size: 90%; color: #18171d; word-wrap: break-word; background-color: #ececef; border-radius: .25rem; font-weight: inherit; font-family: "GitLab Mono","JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; vertical-align: bottom; white-space: pre-wrap; overflow-wrap: break-word; word-break: keep-all; padding: 2px 4px;'>zynqmp_qemu</code> BSP with <code style='font-size: 90%; color: #18171d; word-wrap: break-word; background-color: #ececef; border-radius: .25rem; font-weight: inherit; font-family: "GitLab Mono","JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; vertical-align: bottom; white-space: pre-wrap; overflow-wrap: break-word; word-break: keep-all; padding: 2px 4px;'>lwip</code> stack.</p>
<p dir="auto" style="color: #28272d; margin: 0 0 16px;" align="initial">tcp:
<a class="no-attachment-icon gfm" href="https://gitlab.rtems.org/-/project/15/uploads/4b2ab750eb2021ca1052ec7a1aed19e1/image.png" target="_blank" rel="noopener noreferrer" data-canonical-src="/uploads/4b2ab750eb2021ca1052ec7a1aed19e1/image.png" data-link="true" style="margin-top: 0;"><img src="https://gitlab.rtems.org/-/project/15/uploads/4b2ab750eb2021ca1052ec7a1aed19e1/image.png" alt="image" data-canonical-src="/uploads/4b2ab750eb2021ca1052ec7a1aed19e1/image.png" class="gfm" style="max-width: 100%; height: auto; margin: 0 0 8px;"></a>
ttcp cannot print report.</p>
<p dir="auto" style="color: #28272d; margin: 0 0 16px;" align="initial">udp:
<a class="no-attachment-icon gfm" href="https://gitlab.rtems.org/-/project/15/uploads/5ea473ea6922c7882865835b1bf25d1a/image.png" target="_blank" rel="noopener noreferrer" data-canonical-src="/uploads/5ea473ea6922c7882865835b1bf25d1a/image.png" data-link="true" style="margin-top: 0;"><img src="https://gitlab.rtems.org/-/project/15/uploads/5ea473ea6922c7882865835b1bf25d1a/image.png" alt="image" data-canonical-src="/uploads/5ea473ea6922c7882865835b1bf25d1a/image.png" class="gfm" style="max-width: 100%; height: auto; margin: 0 0 8px;"></a>
ttcp printed the report, but a large number of udp packets were lost.</p>
<h2 dir="auto" style="font-size: 1.5em; font-weight: 600; padding-bottom: .3em; border-bottom-width: 1px; border-bottom-color: #bfbfc3; border-bottom-style: solid; color: #28272d; margin: 24px 0 16px;" align="initial">
<a href="#steps-to-reproduce" aria-hidden="true" class="anchor" id="user-content-steps-to-reproduce" style="margin-top: 0; float: left; margin-left: -20px; text-decoration: none; outline: none;"></a>Steps to reproduce</h2>
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<li style="margin-top: 0; line-height: 1.6em; margin-left: 25px; padding-left: 3px;">build <code style='font-size: 90%; color: #18171d; word-wrap: break-word; background-color: #ececef; border-radius: .25rem; margin-top: 0; font-family: "GitLab Mono","JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; vertical-align: bottom; white-space: pre-wrap; overflow-wrap: break-word; word-break: keep-all; padding: 2px 4px;'>zynqmp_qemu</code> BSP.</li>
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<pre data-canonical-lang="shell" class="code highlight js-syntax-highlight language-shell" v-pre="true" style='display: block; font-size: 14px; color: #28272d; line-height: 1.6em; overflow-x: auto; border-radius: .25rem; position: relative; font-family: "GitLab Mono","JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; word-break: break-all; word-wrap: break-word; background-color: #fbfafd; margin: 0 0 16px; padding: 12px; border: 1px solid #dcdcde;'><code style='font-size: inherit; color: inherit; word-wrap: normal; word-break: keep-all; background-color: inherit; border-radius: .25rem; white-space: pre; margin-top: 0; font-family: "GitLab Mono","JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; vertical-align: bottom; overflow-wrap: normal; padding: unset;'><span id="LC1" class="line" lang="shell" style="margin-top: 0;"><span class="nb" style="margin-top: 0;">cd</span> ~/RTEMS_devel/src/<span class="nv">$rtems_src</span></span>
<span id="LC2" class="line" lang="shell">./waf distclean</span>
<span id="LC3" class="line" lang="shell">./waf configure <span class="nt" style="margin-top: 0;">--prefix</span><span class="o">=</span><span class="nv">$HOME</span>/RTEMS_devel/rtems/6 <span class="nt">--rtems-config</span><span class="o">=</span><span class="nv">$HOME</span>/RTEMS_devel/config.ini</span>
<span id="LC4" class="line" lang="shell">./waf</span>
<span id="LC5" class="line" lang="shell">./waf <span class="nb" style="margin-top: 0;">install</span></span></code></pre>
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<li style="margin-top: 0; line-height: 1.6em; margin-left: 25px; padding-left: 3px;">build <code style='font-size: 90%; color: #18171d; word-wrap: break-word; background-color: #ececef; border-radius: .25rem; margin-top: 0; font-family: "GitLab Mono","JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; vertical-align: bottom; white-space: pre-wrap; overflow-wrap: break-word; word-break: keep-all; padding: 2px 4px;'>rtems-lwip</code>
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<pre data-canonical-lang="shell" class="code highlight js-syntax-highlight language-shell" v-pre="true" style='display: block; font-size: 14px; color: #28272d; line-height: 1.6em; overflow-x: auto; border-radius: .25rem; position: relative; font-family: "GitLab Mono","JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; word-break: break-all; word-wrap: break-word; background-color: #fbfafd; margin: 0 0 16px; padding: 12px; border: 1px solid #dcdcde;'><code style='font-size: inherit; color: inherit; word-wrap: normal; word-break: keep-all; background-color: inherit; border-radius: .25rem; white-space: pre; margin-top: 0; font-family: "GitLab Mono","JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; vertical-align: bottom; overflow-wrap: normal; padding: unset;'><span id="LC1" class="line" lang="shell" style="margin-top: 0;">./waf configure <span class="nt" style="margin-top: 0;">--prefix</span><span class="o">=</span><span class="nv">$HOME</span>/RTEMS_devel/rtems/6 <span class="nt">--rtems-bsps</span> aarch64/zynqmp_qemu</span>
<span id="LC2" class="line" lang="shell">./waf</span>
<span id="LC3" class="line" lang="shell">./waf <span class="nb" style="margin-top: 0;">install</span></span></code></pre>
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<li style="margin-top: 0; line-height: 1.6em; margin-left: 25px; padding-left: 3px;">build <code style='font-size: 90%; color: #18171d; word-wrap: break-word; background-color: #ececef; border-radius: .25rem; margin-top: 0; font-family: "GitLab Mono","JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; vertical-align: bottom; white-space: pre-wrap; overflow-wrap: break-word; word-break: keep-all; padding: 2px 4px;'>rtems-net-services</code>
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<pre data-canonical-lang="shell" class="code highlight js-syntax-highlight language-shell" v-pre="true" style='display: block; font-size: 14px; color: #28272d; line-height: 1.6em; overflow-x: auto; border-radius: .25rem; position: relative; font-family: "GitLab Mono","JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; word-break: break-all; word-wrap: break-word; background-color: #fbfafd; margin: 0 0 16px; padding: 12px; border: 1px solid #dcdcde;'><code style='font-size: inherit; color: inherit; word-wrap: normal; word-break: keep-all; background-color: inherit; border-radius: .25rem; white-space: pre; margin-top: 0; font-family: "GitLab Mono","JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; vertical-align: bottom; overflow-wrap: normal; padding: unset;'><span id="LC1" class="line" lang="shell" style="margin-top: 0;">./waf configure <span class="nt" style="margin-top: 0;">--prefix</span><span class="o">=</span><span class="nv">$HOME</span>/RTEMS_devel/rtems/6 <span class="nt">--rtems-bsps</span> aarch64/zynqmp_qemu</span>
<span id="LC2" class="line" lang="shell">./waf</span>
<span id="LC3" class="line" lang="shell">./waf <span class="nb" style="margin-top: 0;">install</span></span></code></pre>
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<li style="margin-top: 0; line-height: 1.6em; margin-left: 25px; padding-left: 3px;">run in qemu.</li>
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<pre data-canonical-lang="shell" class="code highlight js-syntax-highlight language-shell" v-pre="true" style='display: block; font-size: 14px; color: #28272d; line-height: 1.6em; overflow-x: auto; border-radius: .25rem; position: relative; font-family: "GitLab Mono","JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; word-break: break-all; word-wrap: break-word; background-color: #fbfafd; margin: 0 0 16px; padding: 12px; border: 1px solid #dcdcde;'><code style='font-size: inherit; color: inherit; word-wrap: normal; word-break: keep-all; background-color: inherit; border-radius: .25rem; white-space: pre; margin-top: 0; font-family: "GitLab Mono","JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; vertical-align: bottom; overflow-wrap: normal; padding: unset;'><span id="LC1" class="line" lang="shell" style="margin-top: 0;">qemu-system-aarch64 <span class="nt" style="margin-top: 0;">-no-reboot</span> <span class="nt">-nographic</span> <span class="nt">-serial</span> mon:stdio <span class="nt">-machine</span> xlnx-zcu102 <span class="nt">-m</span> 4096 <span class="nt">-nic</span> user,model<span class="o">=</span>cadence_gem,id<span class="o">=</span>u1,hostfwd<span class="o">=</span>tcp::5001-:5001,hostfwd<span class="o">=</span>udp::5001-:5001 <span class="nt">-kernel</span> <span class="nv">$app</span></span></code></pre>
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<li style="margin-top: 0; line-height: 1.6em; margin-left: 25px; padding-left: 3px;">build ttcp on host.</li>
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<pre data-canonical-lang="shell" class="code highlight js-syntax-highlight language-shell" v-pre="true" style='display: block; font-size: 14px; color: #28272d; line-height: 1.6em; overflow-x: auto; border-radius: .25rem; position: relative; font-family: "GitLab Mono","JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; word-break: break-all; word-wrap: break-word; background-color: #fbfafd; margin: 0 0 16px; padding: 12px; border: 1px solid #dcdcde;'><code style='font-size: inherit; color: inherit; word-wrap: normal; word-break: keep-all; background-color: inherit; border-radius: .25rem; white-space: pre; margin-top: 0; font-family: "GitLab Mono","JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; vertical-align: bottom; overflow-wrap: normal; padding: unset;'><span id="LC1" class="line" lang="shell" style="margin-top: 0;"><span class="nb" style="margin-top: 0;">cd </span>src/rtems-net-services/ttcp</span>
<span id="LC2" class="line" lang="shell">gcc ttcp.c</span></code></pre>
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<li style="margin-top: 0; line-height: 1.6em; margin-left: 25px; padding-left: 3px;">Enter the command line in qemu RTEMS shell.</li>
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<pre class="code highlight js-syntax-highlight language-plaintext" v-pre="true" style='display: block; font-size: 14px; color: #28272d; line-height: 1.6em; overflow-x: auto; border-radius: .25rem; position: relative; font-family: "GitLab Mono","JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; word-break: break-all; word-wrap: break-word; background-color: #fbfafd; margin: 0 0 16px; padding: 12px; border: 1px solid #dcdcde;'><code style='font-size: inherit; color: inherit; word-wrap: normal; word-break: keep-all; background-color: inherit; border-radius: .25rem; white-space: pre; margin-top: 0; font-family: "GitLab Mono","JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; vertical-align: bottom; overflow-wrap: normal; padding: unset;'><span id="LC1" class="line" lang="plaintext" style="margin-top: 0;">ttcp -s -r</span></code></pre>
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<p dir="auto" style="color: #28272d; margin: 0 0 16px;" align="initial">or</p>
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<pre class="code highlight js-syntax-highlight language-plaintext" v-pre="true" style='display: block; font-size: 14px; color: #28272d; line-height: 1.6em; overflow-x: auto; border-radius: .25rem; position: relative; font-family: "GitLab Mono","JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; word-break: break-all; word-wrap: break-word; background-color: #fbfafd; margin: 0 0 16px; padding: 12px; border: 1px solid #dcdcde;'><code style='font-size: inherit; color: inherit; word-wrap: normal; word-break: keep-all; background-color: inherit; border-radius: .25rem; white-space: pre; margin-top: 0; font-family: "GitLab Mono","JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; vertical-align: bottom; overflow-wrap: normal; padding: unset;'><span id="LC1" class="line" lang="plaintext" style="margin-top: 0;">ttcp -s -r -u</span></code></pre>
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<li style="margin-top: 0; line-height: 1.6em; margin-left: 25px; padding-left: 3px;">Enter the command line in host shell.</li>
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<pre class="code highlight js-syntax-highlight language-plaintext" v-pre="true" style='display: block; font-size: 14px; color: #28272d; line-height: 1.6em; overflow-x: auto; border-radius: .25rem; position: relative; font-family: "GitLab Mono","JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; word-break: break-all; word-wrap: break-word; background-color: #fbfafd; margin: 0 0 16px; padding: 12px; border: 1px solid #dcdcde;'><code style='font-size: inherit; color: inherit; word-wrap: normal; word-break: keep-all; background-color: inherit; border-radius: .25rem; white-space: pre; margin-top: 0; font-family: "GitLab Mono","JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; vertical-align: bottom; overflow-wrap: normal; padding: unset;'><span id="LC1" class="line" lang="plaintext" style="margin-top: 0;">cd src/rtems-net-services/ttcp</span>
<span id="LC2" class="line" lang="plaintext">./a.out -s -t -u 127.0.0.1</span></code></pre>
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<p dir="auto" style="color: #28272d; margin: 0 0 16px;" align="initial">or</p>
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<pre class="code highlight js-syntax-highlight language-plaintext" v-pre="true" style='display: block; font-size: 14px; color: #28272d; line-height: 1.6em; overflow-x: auto; border-radius: .25rem; position: relative; font-family: "GitLab Mono","JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; word-break: break-all; word-wrap: break-word; background-color: #fbfafd; margin: 0 0 16px; padding: 12px; border: 1px solid #dcdcde;'><code style='font-size: inherit; color: inherit; word-wrap: normal; word-break: keep-all; background-color: inherit; border-radius: .25rem; white-space: pre; margin-top: 0; font-family: "GitLab Mono","JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; vertical-align: bottom; overflow-wrap: normal; padding: unset;'><span id="LC1" class="line" lang="plaintext" style="margin-top: 0;">./a.out -s -t 127.0.0.1</span></code></pre>
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