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net/resolvers/manual.lua @ 12446:e54b8a5e35ad 0.12
util.random: Test whether util.crand works before using it (fix #1734)
util.crand can be configured at compile time to use the Linux
getrandom() system call, available from Linux 3.17, but it is still
possible to load it with an older kernel lacking that system call, where
attempting to use it throws an ENOSYS error.
By testing for this on load we can fall back to /dev/urandom in this
case.
author | Kim Alvefur <zash@zash.se> |
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date | Sat, 02 Apr 2022 16:33:27 +0200 |
parent | 9691:e11e076f0eb8 |
child | 12589:39ae08180c81 |
rev | line source |
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1 local methods = {}; |
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2 local resolver_mt = { __index = methods }; |
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3 local unpack = table.unpack or unpack; -- luacheck: ignore 113 |
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4 |
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5 -- Find the next target to connect to, and |
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6 -- pass it to cb() |
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7 function methods:next(cb) |
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8 if #self.targets == 0 then |
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9 cb(nil); |
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10 return; |
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11 end |
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12 local next_target = table.remove(self.targets, 1); |
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13 cb(unpack(next_target, 1, 4)); |
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14 end |
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15 |
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16 local function new(targets, conn_type, extra) |
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17 return setmetatable({ |
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18 conn_type = conn_type; |
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19 extra = extra; |
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20 targets = targets or {}; |
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21 }, resolver_mt); |
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22 end |
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23 |
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24 return { |
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25 new = new; |
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26 }; |