prosody-modules
8e686bf63441
mod_firewall/actions.lib.lua

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mod_firewall/actions.lib.lua @ 2459:8e686bf63441

mod_net_dovecotauth: Rename variable to avoid name clash [luacheck]
author Kim Alvefur <zash@zash.se>
date Sun, 22 Jan 2017 04:47:06 +0100
parent 2415:07d7036040ee
child 2519:d4bc434a60a4
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 --luacheck: globals meta idsafe
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2 local action_handlers = {};
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3
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4
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5 -- Takes an XML string and returns a code string that builds that stanza
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6 -- using st.stanza()
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7 local function compile_xml(data)
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8 local code = {};
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9 local first, short_close = true, nil;
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10 for tagline, text in data:gmatch("<([^>]+)>([^<]*)") do
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11 if tagline:sub(-1,-1) == "/" then
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12 tagline = tagline:sub(1, -2);
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13 short_close = true;
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14 end
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15 if tagline:sub(1,1) == "/" then
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16 code[#code+1] = (":up()");
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17 else
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18 local name, attr = tagline:match("^(%S*)%s*(.*)$");
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19 local attr_str = {};
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20 for k, _, v in attr:gmatch("(%S+)=([\"'])([^%2]-)%2") do
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21 if #attr_str == 0 then
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22 table.insert(attr_str, ", { ");
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23 else
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24 table.insert(attr_str, ", ");
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25 end
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26 if k:find("^%a%w*$") then
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27 table.insert(attr_str, string.format("%s = %q", k, v));
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28 else
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29 table.insert(attr_str, string.format("[%q] = %q", k, v));
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30 end
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31 end
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32 if #attr_str > 0 then
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33 table.insert(attr_str, " }");
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34 end
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35 if first then
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36 code[#code+1] = (string.format("st.stanza(%q %s)", name, #attr_str>0 and table.concat(attr_str) or ", nil"));
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37 first = nil;
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38 else
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39 code[#code+1] = (string.format(":tag(%q%s)", name, table.concat(attr_str)));
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40 end
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41 end
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42 if text and text:find("%S") then
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43 code[#code+1] = (string.format(":text(%q)", text));
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44 elseif short_close then
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45 short_close = nil;
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46 code[#code+1] = (":up()");
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47 end
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48 end
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49 return table.concat(code, "");
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50 end
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51
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52 function action_handlers.PASS()
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53 return "do return end"
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54 end
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55
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56 function action_handlers.DROP()
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57 return "do return true end";
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58 end
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59
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60 function action_handlers.STRIP(tag_desc)
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61 local code = {};
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62 local name, xmlns = tag_desc:match("^(%S+) (.+)$");
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63 if not name then
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64 name, xmlns = tag_desc, nil;
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65 end
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66 if name == "*" then
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67 name = nil;
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68 end
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69 code[#code+1] = ("local stanza_xmlns = stanza.attr.xmlns; ");
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70 code[#code+1] = "stanza:maptags(function (tag) if ";
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71 if name then
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72 code[#code+1] = ("tag.name == %q and "):format(name);
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73 end
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74 if xmlns then
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75 code[#code+1] = ("(tag.attr.xmlns or stanza_xmlns) == %q "):format(xmlns);
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76 else
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77 code[#code+1] = ("tag.attr.xmlns == stanza_xmlns ");
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78 end
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79 code[#code+1] = "then return nil; end return tag; end );";
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80 return table.concat(code);
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81 end
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82
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83 function action_handlers.INJECT(tag)
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84 return "stanza:add_child("..compile_xml(tag)..")", { "st" };
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85 end
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86
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87 local error_types = {
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88 ["bad-request"] = "modify";
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89 ["conflict"] = "cancel";
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90 ["feature-not-implemented"] = "cancel";
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91 ["forbidden"] = "auth";
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92 ["gone"] = "cancel";
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93 ["internal-server-error"] = "cancel";
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94 ["item-not-found"] = "cancel";
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95 ["jid-malformed"] = "modify";
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96 ["not-acceptable"] = "modify";
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97 ["not-allowed"] = "cancel";
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98 ["not-authorized"] = "auth";
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99 ["payment-required"] = "auth";
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100 ["policy-violation"] = "modify";
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101 ["recipient-unavailable"] = "wait";
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102 ["redirect"] = "modify";
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103 ["registration-required"] = "auth";
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104 ["remote-server-not-found"] = "cancel";
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105 ["remote-server-timeout"] = "wait";
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106 ["resource-constraint"] = "wait";
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107 ["service-unavailable"] = "cancel";
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108 ["subscription-required"] = "auth";
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109 ["undefined-condition"] = "cancel";
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110 ["unexpected-request"] = "wait";
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111 };
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112
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113
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114 local function route_modify(make_new, to, drop)
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115 local reroute, deps = "session.send(newstanza)", { "st" };
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116 if to then
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117 reroute = ("newstanza.attr.to = %q; core_post_stanza(session, newstanza);"):format(to);
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118 deps[#deps+1] = "core_post_stanza";
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119 end
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120 return ([[local newstanza = st.%s; %s;%s]])
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121 :format(make_new, reroute, drop and " return true;" or ""), deps;
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122 end
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123
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124 function action_handlers.BOUNCE(with)
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125 local error = with and with:match("^%S+") or "service-unavailable";
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126 local error_type = error:match(":(%S+)");
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127 if not error_type then
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128 error_type = error_types[error] or "cancel";
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129 else
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130 error = error:match("^[^:]+");
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131 end
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132 error, error_type = string.format("%q", error), string.format("%q", error_type);
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133 local text = with and with:match(" %((.+)%)$");
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134 if text then
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135 text = string.format("%q", text);
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136 else
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137 text = "nil";
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138 end
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139 local route_modify_code, deps = route_modify(("error_reply(stanza, %s, %s, %s)"):format(error_type, error, text), nil, true);
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140 deps[#deps+1] = "type";
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141 deps[#deps+1] = "name";
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142 return [[if type == "error" or (name == "iq" and type == "result") then return true; end -- Don't reply to 'error' stanzas, or iq results
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143 ]]..route_modify_code, deps;
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144 end
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145
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146 function action_handlers.REDIRECT(where)
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147 return route_modify("clone(stanza)", where, true);
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148 end
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149
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150 function action_handlers.COPY(where)
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151 return route_modify("clone(stanza)", where, false);
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152 end
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153
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6ef334596276 mod_firewall/actions: Add REPLY
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parents: 958
diff changeset
154 function action_handlers.REPLY(with)
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parents: 958
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155 return route_modify(("reply(stanza):body(%q)"):format(with));
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156 end
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parents: 958
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157
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158 function action_handlers.LOG(string)
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159 local level = string:match("^%[(%a+)%]") or "info";
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160 string = string:gsub("^%[%a+%] ?", "");
2415
07d7036040ee mod_firewall: Insert semicolons after some statements to prevent ambiguous syntax in output (fixes #797)
Kim Alvefur <zash@zash.se>
parents: 2129
diff changeset
161 return meta(("(session.log or log)(%q, %q);"):format(level, string));
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162 end
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163
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164 function action_handlers.RULEDEP(dep)
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165 return "", { dep };
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166 end
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167
960
d773a51af9b1 mod_firewall: Add actions EVENT (fire an event), JUMP EVENT (transfer control to the handlers of an event), JUMP CHAIN (transfer control to another mod_firewall chain)
Matthew Wild <mwild1@gmail.com>
parents: 959
diff changeset
168 function action_handlers.EVENT(name)
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parents: 959
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169 return ("fire_event(%q, event)"):format(name);
d773a51af9b1 mod_firewall: Add actions EVENT (fire an event), JUMP EVENT (transfer control to the handlers of an event), JUMP CHAIN (transfer control to another mod_firewall chain)
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parents: 959
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170 end
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171
d773a51af9b1 mod_firewall: Add actions EVENT (fire an event), JUMP EVENT (transfer control to the handlers of an event), JUMP CHAIN (transfer control to another mod_firewall chain)
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parents: 959
diff changeset
172 function action_handlers.JUMP_EVENT(name)
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parents: 959
diff changeset
173 return ("do return fire_event(%q, event); end"):format(name);
d773a51af9b1 mod_firewall: Add actions EVENT (fire an event), JUMP EVENT (transfer control to the handlers of an event), JUMP CHAIN (transfer control to another mod_firewall chain)
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parents: 959
diff changeset
174 end
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175
d773a51af9b1 mod_firewall: Add actions EVENT (fire an event), JUMP EVENT (transfer control to the handlers of an event), JUMP CHAIN (transfer control to another mod_firewall chain)
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parents: 959
diff changeset
176 function action_handlers.JUMP_CHAIN(name)
2106
f2ee508315e1 mod_firewall: JUMP_CHAIN: Fix implementation to match docs (i.e. continue processing current chain if stanza not handled)
Matthew Wild <mwild1@gmail.com>
parents: 2094
diff changeset
177 return ("if fire_event(%q, event) then return true; end"):format("firewall/chains/"..name);
960
d773a51af9b1 mod_firewall: Add actions EVENT (fire an event), JUMP EVENT (transfer control to the handlers of an event), JUMP CHAIN (transfer control to another mod_firewall chain)
Matthew Wild <mwild1@gmail.com>
parents: 959
diff changeset
178 end
d773a51af9b1 mod_firewall: Add actions EVENT (fire an event), JUMP EVENT (transfer control to the handlers of an event), JUMP CHAIN (transfer control to another mod_firewall chain)
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parents: 959
diff changeset
179
2107
f445f43b9ba1 mod_firewall: Add support for session marking (MARK_ORIGIN, UNMARK_ORIGIN, ORIGIN_MARKED)
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parents: 2106
diff changeset
180 function action_handlers.MARK_ORIGIN(name)
f445f43b9ba1 mod_firewall: Add support for session marking (MARK_ORIGIN, UNMARK_ORIGIN, ORIGIN_MARKED)
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parents: 2106
diff changeset
181 return [[session.firewall_marked_]]..idsafe(name)..[[ = current_timestamp;]], { "timestamp" };
f445f43b9ba1 mod_firewall: Add support for session marking (MARK_ORIGIN, UNMARK_ORIGIN, ORIGIN_MARKED)
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parents: 2106
diff changeset
182 end
f445f43b9ba1 mod_firewall: Add support for session marking (MARK_ORIGIN, UNMARK_ORIGIN, ORIGIN_MARKED)
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parents: 2106
diff changeset
183
f445f43b9ba1 mod_firewall: Add support for session marking (MARK_ORIGIN, UNMARK_ORIGIN, ORIGIN_MARKED)
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parents: 2106
diff changeset
184 function action_handlers.UNMARK_ORIGIN(name)
f445f43b9ba1 mod_firewall: Add support for session marking (MARK_ORIGIN, UNMARK_ORIGIN, ORIGIN_MARKED)
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parents: 2106
diff changeset
185 return [[session.firewall_marked_]]..idsafe(name)..[[ = nil;]]
f445f43b9ba1 mod_firewall: Add support for session marking (MARK_ORIGIN, UNMARK_ORIGIN, ORIGIN_MARKED)
Matthew Wild <mwild1@gmail.com>
parents: 2106
diff changeset
186 end
f445f43b9ba1 mod_firewall: Add support for session marking (MARK_ORIGIN, UNMARK_ORIGIN, ORIGIN_MARKED)
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parents: 2106
diff changeset
187
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188 return action_handlers;