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Further optimisation of --port-limit.

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No longer try and fail to open every port when the port range
is in complete use; go straight to re-using an existing socket.

Die at startup if port range is smaller than --port-limit, since
the code behaves badly in this case.
This commit is contained in:
Simon Kelley
2022-09-09 18:18:46 +01:00
parent 3f56bb8ba1
commit c0e731d545
4 changed files with 64 additions and 15 deletions
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4
src/dnsmasq.c
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@@ -265,6 +265,10 @@ int main (int argc, char **argv)
if (daemon->max_port < daemon->min_port)
die(_("max_port cannot be smaller than min_port"), NULL, EC_BADCONF);
if (daemon->max_port != 0 &&
daemon->max_port - daemon->min_port + 1 < daemon->randport_limit)
die(_("port_limit must not be larger than available port range"), NULL, EC_BADCONF);
now = dnsmasq_time();