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<h3>
Samuel Thibault pushed to branch master
at <a href="https://gitlab.freedesktop.org/slirp/libslirp">slirp / libslirp</a>
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Commits:
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<strong><a href="https://gitlab.freedesktop.org/slirp/libslirp/-/commit/99bc3fc61e58fa29eac5577aa4dcaf1ede732d4a">99bc3fc6</a></strong>
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<span>by Samuel Thibault</span>
<i>at 2021-11-12T00:31:24+01:00</i>
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<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">slirp_pollfds_fill: Explain why dividing so_snd.sb_datalen by two
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<h4>2 changed files:</h4>
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src/libslirp.h
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src/slirp.c
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<h4>Changes:</h4>
<li id="bb39274a63531fe7bbc3eb3dff69b25f26ed9e3a">
<a href="https://gitlab.freedesktop.org/slirp/libslirp/-/commit/99bc3fc61e58fa29eac5577aa4dcaf1ede732d4a#bb39274a63531fe7bbc3eb3dff69b25f26ed9e3a"><strong>src/libslirp.h</strong></a>
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<td class="line_content match" style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -68,7 +68,8 @@ typedef struct SlirpCb {</td>
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<pre style="margin: 0;"> <span id="LC68" class="line" lang="c"> <span class="kt" style="color: #458; font-weight: 600;">void</span> <span class="p">(</span><span class="o" style="font-weight: 600;">*</span><span class="n" style="color: #333;">register_poll_fd</span><span class="p">)(</span><span class="kt" style="color: #458; font-weight: 600;">int</span> <span class="n" style="color: #333;">fd</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">void</span> <span class="o" style="font-weight: 600;">*</span><span class="n" style="color: #333;">opaque</span><span class="p">);</span></span>
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<pre style="margin: 0;"> <span id="LC69" class="line" lang="c"> <span class="cm" style="color: #998; font-style: italic;">/* Unregister a fd */</span></span>
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<pre style="margin: 0;"> <span id="LC70" class="line" lang="c"> <span class="kt" style="color: #458; font-weight: 600;">void</span> <span class="p">(</span><span class="o" style="font-weight: 600;">*</span><span class="n" style="color: #333;">unregister_poll_fd</span><span class="p">)(</span><span class="kt" style="color: #458; font-weight: 600;">int</span> <span class="n" style="color: #333;">fd</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">void</span> <span class="o" style="font-weight: 600;">*</span><span class="n" style="color: #333;">opaque</span><span class="p">);</span></span>
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<pre style="margin: 0;">-<span id="LC71" class="line" lang="c"> <span class="cm" style="color: #998; font-style: italic;">/* Kick the io-thread, to signal that new events may be processed */</span></span>
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<pre style="margin: 0;">+<span id="LC71" class="line" lang="c"> <span class="cm" style="color: #998; font-style: italic;">/* Kick the io-thread, to signal that new events may be processed because some TCP buffer</span></span>
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<pre style="margin: 0;">+<span id="LC72" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> * can now receive more data, i.e. slirp_socket_can_recv will return 1. */</span></span>
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<pre style="margin: 0;"> <span id="LC73" class="line" lang="c"> <span class="kt" style="color: #458; font-weight: 600;">void</span> <span class="p">(</span><span class="o" style="font-weight: 600;">*</span><span class="n" style="color: #333;">notify</span><span class="p">)(</span><span class="kt" style="color: #458; font-weight: 600;">void</span> <span class="o" style="font-weight: 600;">*</span><span class="n" style="color: #333;">opaque</span><span class="p">);</span></span>
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<pre style="margin: 0;"> <span id="LC74" class="line" lang="c"><span class="p">}</span> <span class="n" style="color: #333;">SlirpCb</span><span class="p">;</span></span>
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<pre style="margin: 0;"> <span id="LC75" class="line" lang="c"></span>
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<a href="https://gitlab.freedesktop.org/slirp/libslirp/-/commit/99bc3fc61e58fa29eac5577aa4dcaf1ede732d4a#9f815106f1b35d4b148233c9a5b4caae3b29c4ca"><strong>src/slirp.c</strong></a>
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<td class="line_content match" style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -613,7 +613,10 @@ void slirp_pollfds_fill(Slirp *slirp, uint32_t *timeout,</td>
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<pre style="margin: 0;"> <span id="LC613" class="line" lang="c"></span>
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<pre style="margin: 0;"> <span id="LC614" class="line" lang="c"> <span class="cm" style="color: #998; font-style: italic;">/*</span></span>
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<pre style="margin: 0;"> <span id="LC615" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> * Set for reading (and urgent data) if we are connected, can</span></span>
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<pre style="margin: 0;">-<span id="LC616" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> * receive more, and we have room for it XXX /2 ?</span></span>
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<pre style="margin: 0;">+<span id="LC616" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> * receive more, and we have room for it.</span></span>
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<pre style="margin: 0;">+<span id="LC617" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> *</span></span>
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<pre style="margin: 0;">+<span id="LC618" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> * If sb is already half full, we will wait for the guest to consume it,</span></span>
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<pre style="margin: 0;">+<span id="LC619" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> * and notify again in sbdrop() when the sb becomes less than half full.</span></span>
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<pre style="margin: 0;"> <span id="LC620" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> */</span></span>
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<pre style="margin: 0;"> <span id="LC621" class="line" lang="c"> <span class="k" style="font-weight: 600;">if</span> <span class="p">(</span><span class="n" style="color: #333;">CONN_CANFRCV</span><span class="p">(</span><span class="n" style="color: #333;">so</span><span class="p">)</span> <span class="o" style="font-weight: 600;">&&</span></span>
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619
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622
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<pre style="margin: 0;"> <span id="LC622" class="line" lang="c"> <span class="p">(</span><span class="n" style="color: #333;">so</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">so_snd</span><span class="p">.</span><span class="n" style="color: #333;">sb_cc</span> <span class="o" style="font-weight: 600;"><</span> <span class="p">(</span><span class="n" style="color: #333;">so</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">so_snd</span><span class="p">.</span><span class="n" style="color: #333;">sb_datalen</span> <span class="o" style="font-weight: 600;">/</span> <span class="mi" style="color: #099;">2</span><span class="p">)))</span> <span class="p">{</span></span>
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<td class="line_content match" style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1359,6 +1362,8 @@ size_t slirp_socket_can_recv(Slirp *slirp, struct in_addr guest_addr,</td>
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1359
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1362
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<pre style="margin: 0;"> <span id="LC1362" class="line" lang="c"> <span class="p">}</span></span>
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1360
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1363
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<pre style="margin: 0;"> <span id="LC1363" class="line" lang="c"></span>
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1361
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1364
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<pre style="margin: 0;"> <span id="LC1364" class="line" lang="c"> <span class="k" style="font-weight: 600;">if</span> <span class="p">(</span><span class="o" style="font-weight: 600;">!</span><span class="n" style="color: #333;">CONN_CANFRCV</span><span class="p">(</span><span class="n" style="color: #333;">so</span><span class="p">)</span> <span class="o" style="font-weight: 600;">||</span> <span class="n" style="color: #333;">so</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">so_snd</span><span class="p">.</span><span class="n" style="color: #333;">sb_cc</span> <span class="o" style="font-weight: 600;">>=</span> <span class="p">(</span><span class="n" style="color: #333;">so</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">so_snd</span><span class="p">.</span><span class="n" style="color: #333;">sb_datalen</span> <span class="o" style="font-weight: 600;">/</span> <span class="mi" style="color: #099;">2</span><span class="p">))</span> <span class="p">{</span></span>
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<pre style="margin: 0;">+<span id="LC1365" class="line" lang="c"> <span class="cm" style="color: #998; font-style: italic;">/* If the sb is already half full, we will wait for the guest to consume it,</span></span>
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<pre style="margin: 0;">+<span id="LC1366" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> * and notify again in sbdrop() when the sb becomes less than half full. */</span></span>
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1367
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<pre style="margin: 0;"> <span id="LC1367" class="line" lang="c"> <span class="k" style="font-weight: 600;">return</span> <span class="mi" style="color: #099;">0</span><span class="p">;</span></span>
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1368
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<pre style="margin: 0;"> <span id="LC1368" class="line" lang="c"> <span class="p">}</span></span>
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1369
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<pre style="margin: 0;"> <span id="LC1369" class="line" lang="c"></span>
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