net.server_epoll: Add support for systemd socket activation
Allows creating listening sockets and accepting client connections
before Prosody starts.
This is unlike normal Prosody dynamic resource management, where ports
may added and removed at any time, and the ports defined by the config.
Weird things happen if these are closed (e.g. due to reload) so here we
prevent closing and ensure sockets are reused when opened again.
-- Only the operators needed by net.websocket.frames are provided at this point
return {
band = function (a, b, ...)
local ret = a & b;
if ... then
for i = 1, select("#", ...) do
ret = ret & (select(i, ...));
end
end
return ret;
end;
bor = function (a, b, ...)
local ret = a | b;
if ... then
for i = 1, select("#", ...) do
ret = ret | (select(i, ...));
end
end
return ret;
end;
bxor = function (a, b, ...)
local ret = a ~ b;
if ... then
for i = 1, select("#", ...) do
ret = ret ~ (select(i, ...));
end
end
return ret;
end;
bnot = function (x)
return ~x;
end;
rshift = function (a, n) return a >> n end;
lshift = function (a, n) return a << n end;
};