prosody
e0ab20519ce5
spec/net_resolvers_service_spec.lua

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spec/net_resolvers_service_spec.lua @ 13232:e0ab20519ce5

plugins: Use get_option_array for some list shaped options Passing something from module:get_option() to ipairs() suggests that the option is a list of some sort.
author Kim Alvefur <zash@zash.se>
date Fri, 21 Jul 2023 22:48:54 +0200
parent 12401:c029ddcad258
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
12401
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
1 local set = require "util.set";
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
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2
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
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3 insulate("net.resolvers.service", function ()
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
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4 local adns = {
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
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5 resolver = function ()
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
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6 return {
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
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7 lookup = function (_, cb, qname, qtype, qclass)
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
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8 if qname == "_xmpp-server._tcp.example.com"
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
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9 and (qtype or "SRV") == "SRV"
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
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10 and (qclass or "IN") == "IN" then
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
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11 cb({
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
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12 { -- 60+35+60
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
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parents:
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13 srv = { target = "xmpp0-a.example.com", port = 5228, priority = 0, weight = 60 };
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
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14 };
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
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15 {
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
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16 srv = { target = "xmpp0-b.example.com", port = 5216, priority = 0, weight = 35 };
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
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17 };
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
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18 {
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
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19 srv = { target = "xmpp0-c.example.com", port = 5200, priority = 0, weight = 0 };
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20 };
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
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21 {
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
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22 srv = { target = "xmpp0-d.example.com", port = 5256, priority = 0, weight = 120 };
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23 };
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
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24
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
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25 {
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26 srv = { target = "xmpp1-a.example.com", port = 5273, priority = 1, weight = 30 };
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27 };
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
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28 {
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
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29 srv = { target = "xmpp1-b.example.com", port = 5274, priority = 1, weight = 30 };
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30 };
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31
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32 {
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
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33 srv = { target = "xmpp2.example.com", port = 5275, priority = 2, weight = 0 };
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34 };
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35 });
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36 elseif qname == "_xmpp-server._tcp.single.example.com"
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37 and (qtype or "SRV") == "SRV"
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38 and (qclass or "IN") == "IN" then
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
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39 cb({
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
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40 {
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41 srv = { target = "xmpp0-a.example.com", port = 5269, priority = 0, weight = 0 };
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42 };
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43 });
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44 elseif qname == "_xmpp-server._tcp.half.example.com"
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
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parents:
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45 and (qtype or "SRV") == "SRV"
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
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46 and (qclass or "IN") == "IN" then
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
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47 cb({
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
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48 {
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49 srv = { target = "xmpp0-a.example.com", port = 5269, priority = 0, weight = 0 };
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50 };
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51 {
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52 srv = { target = "xmpp0-b.example.com", port = 5270, priority = 0, weight = 1 };
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53 };
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54 });
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55 elseif qtype == "A" then
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
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56 local l = qname:match("%-(%a)%.example.com$") or "1";
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57 local d = ("%d"):format(l:byte())
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58 cb({
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
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59 {
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
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60 a = "127.0.0."..d;
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61 };
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
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62 });
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63 elseif qtype == "AAAA" then
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64 local l = qname:match("%-(%a)%.example.com$") or "1";
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65 local d = ("%04d"):format(l:byte())
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66 cb({
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
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67 {
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
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parents:
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68 aaaa = "fdeb:9619:649e:c7d9::"..d;
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
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parents:
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69 };
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70 });
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71 else
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Matthew Wild <mwild1@gmail.com>
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72 cb(nil);
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
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parents:
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73 end
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74 end;
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75 };
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76 end;
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77 };
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parents:
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78 package.loaded["net.adns"] = mock(adns);
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parents:
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79 local resolver = require "net.resolvers.service";
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80 math.randomseed(os.time());
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81 it("works for 99% of deployments", function ()
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
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parents:
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82 -- Most deployments only have a single SRV record, let's make
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
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parents:
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83 -- sure that works okay
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
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parents:
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84
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85 local expected_targets = set.new({
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
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86 -- xmpp0-a
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
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87 "tcp4 127.0.0.97 5269";
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
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88 "tcp6 fdeb:9619:649e:c7d9::0097 5269";
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
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parents:
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89 });
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parents:
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90 local received_targets = set.new({});
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parents:
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91
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parents:
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92 local r = resolver.new("single.example.com", "xmpp-server");
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parents:
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93 local done = false;
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parents:
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94 local function handle_target(...)
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95 if ... == nil then
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parents:
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96 done = true;
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parents:
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97 -- No more targets
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
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parents:
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98 return;
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
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99 end
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
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parents:
diff changeset
100 received_targets:add(table.concat({ ... }, " ", 1, 3));
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
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parents:
diff changeset
101 end
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
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parents:
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102 r:next(handle_target);
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103 while not done do
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parents:
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104 r:next(handle_target);
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
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105 end
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Matthew Wild <mwild1@gmail.com>
parents:
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106
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
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parents:
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107 -- We should have received all expected targets, and no unexpected
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parents:
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108 -- ones:
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
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109 assert.truthy(set.xor(received_targets, expected_targets):empty());
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
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parents:
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110 end);
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parents:
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111
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
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parents:
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112 it("supports A/AAAA fallback", function ()
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parents:
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113 -- Many deployments don't have any SRV records, so we should
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parents:
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114 -- fall back to A/AAAA records instead when that is the case
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parents:
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115
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116 local expected_targets = set.new({
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parents:
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117 -- xmpp0-a
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parents:
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118 "tcp4 127.0.0.97 5269";
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parents:
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119 "tcp6 fdeb:9619:649e:c7d9::0097 5269";
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parents:
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120 });
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parents:
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121 local received_targets = set.new({});
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parents:
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122
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parents:
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123 local r = resolver.new("xmpp0-a.example.com", "xmpp-server", "tcp", { default_port = 5269 });
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parents:
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124 local done = false;
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parents:
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125 local function handle_target(...)
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parents:
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126 if ... == nil then
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
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parents:
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127 done = true;
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
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parents:
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128 -- No more targets
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
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parents:
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129 return;
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
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130 end
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parents:
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131 received_targets:add(table.concat({ ... }, " ", 1, 3));
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parents:
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132 end
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parents:
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133 r:next(handle_target);
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
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parents:
diff changeset
134 while not done do
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
135 r:next(handle_target);
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
136 end
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
137
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
138 -- We should have received all expected targets, and no unexpected
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
139 -- ones:
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
140 assert.truthy(set.xor(received_targets, expected_targets):empty());
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
141 end);
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
142
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
143
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
144 it("works", function ()
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
145 local expected_targets = set.new({
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
146 -- xmpp0-a
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
147 "tcp4 127.0.0.97 5228";
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
148 "tcp6 fdeb:9619:649e:c7d9::0097 5228";
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
149 "tcp4 127.0.0.97 5273";
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
150 "tcp6 fdeb:9619:649e:c7d9::0097 5273";
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
151
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
152 -- xmpp0-b
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
153 "tcp4 127.0.0.98 5274";
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
154 "tcp6 fdeb:9619:649e:c7d9::0098 5274";
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
155 "tcp4 127.0.0.98 5216";
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
156 "tcp6 fdeb:9619:649e:c7d9::0098 5216";
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
157
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
158 -- xmpp0-c
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
159 "tcp4 127.0.0.99 5200";
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
160 "tcp6 fdeb:9619:649e:c7d9::0099 5200";
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
161
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
162 -- xmpp0-d
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
163 "tcp4 127.0.0.100 5256";
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
164 "tcp6 fdeb:9619:649e:c7d9::0100 5256";
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
165
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
166 -- xmpp2
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
167 "tcp4 127.0.0.49 5275";
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
168 "tcp6 fdeb:9619:649e:c7d9::0049 5275";
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
169
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
170 });
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
171 local received_targets = set.new({});
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
172
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
173 local r = resolver.new("example.com", "xmpp-server");
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
174 local done = false;
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
175 local function handle_target(...)
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
176 if ... == nil then
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
177 done = true;
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
178 -- No more targets
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
179 return;
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
180 end
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
181 received_targets:add(table.concat({ ... }, " ", 1, 3));
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
182 end
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
183 r:next(handle_target);
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
184 while not done do
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
185 r:next(handle_target);
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
186 end
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
187
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
188 -- We should have received all expected targets, and no unexpected
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
189 -- ones:
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
190 assert.truthy(set.xor(received_targets, expected_targets):empty());
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
191 end);
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
192
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
193 it("balances across weights correctly #slow", function ()
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
194 -- This mimics many repeated connections to 'example.com' (mock
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
195 -- records defined above), and records the port number of the
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
196 -- first target. Therefore it (should) only return priority
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
197 -- 0 records, and the input data is constructed such that the
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
198 -- last two digits of the port number represent the percentage
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
199 -- of times that record should (on average) be picked first.
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
200
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
201 -- To prevent random test failures, we test across a handful
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
202 -- of fixed (randomly selected) seeds.
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
203 for _, seed in ipairs({ 8401877, 3943829, 7830992 }) do
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
204 math.randomseed(seed);
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
205
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
206 local results = {};
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
207 local function run()
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
208 local run_results = {};
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
209 local r = resolver.new("example.com", "xmpp-server");
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
210 local function record_target(...)
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
211 if ... == nil then
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
212 -- No more targets
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
213 return;
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
214 end
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
215 run_results = { ... };
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
216 end
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
217 r:next(record_target);
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
218 return run_results[3];
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
219 end
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
220
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
221 for _ = 1, 1000 do
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
222 local port = run();
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
223 results[port] = (results[port] or 0) + 1;
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
224 end
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
225
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
226 local ports = {};
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
227 for port in pairs(results) do
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
228 table.insert(ports, port);
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
229 end
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
230 table.sort(ports);
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
231 for _, port in ipairs(ports) do
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
232 --print("PORT", port, tostring((results[port]/1000) * 100).."% hits (expected "..tostring(port-5200).."%)");
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
233 local hit_pct = (results[port]/1000) * 100;
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
234 local expected_pct = port - 5200;
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
235 --print(hit_pct, expected_pct, math.abs(hit_pct - expected_pct));
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
236 assert.is_true(math.abs(hit_pct - expected_pct) < 5);
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
237 end
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
238 --print("---");
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
239 end
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
240 end);
c029ddcad258 net.resolvers.service: Honour record 'weight' when picking SRV targets
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
241 end);