libratbox: Allow defer_accept on FreeBSD.
Note that you must have options ACCEPT_FILTER_DATA in your kernel configuration or load the accf_data kernel module. The functionality is not in the GENERIC kernel.
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@ -774,6 +774,17 @@ rb_listen(rb_fde_t *F, int backlog, int defer_accept)
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setsockopt(F->fd, IPPROTO_TCP, TCP_DEFER_ACCEPT, &backlog, sizeof(int));
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}
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#endif
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#ifdef SO_ACCEPTFILTER
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if (defer_accept && !result)
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{
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struct accept_filter_arg afa;
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memset(&afa, '\0', sizeof afa);
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rb_strlcpy(afa.af_name, "dataready", sizeof afa.af_name);
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(void)setsockopt(F->fd, SOL_SOCKET, SO_ACCEPTFILTER, &afa,
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sizeof afa);
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}
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#endif
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return result;
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}
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