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mod_firewall/actions.lib.lua @ 2216:7f36ec9c836e
mod_pep_vcard_png_avatar: Initial commit
author | Michel Le Bihan <michel@lebihan.pl> |
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date | Fri, 24 Jun 2016 19:16:01 +0200 |
parent | 2129:26334f4a8eb9 |
child | 2415:07d7036040ee |
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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154 function action_handlers.REPLY(with) |
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155 return route_modify(("reply(stanza):body(%q)"):format(with)); |
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156 end |
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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+%] ?", ""); |
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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 |
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168 function action_handlers.EVENT(name) |
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169 return ("fire_event(%q, event)"):format(name); |
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170 end |
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171 |
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172 function action_handlers.JUMP_EVENT(name) |
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173 return ("do return fire_event(%q, event); end"):format(name); |
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174 end |
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175 |
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176 function action_handlers.JUMP_CHAIN(name) |
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177 return ("if fire_event(%q, event) then return true; end"):format("firewall/chains/"..name); |
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178 end |
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179 |
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180 function action_handlers.MARK_ORIGIN(name) |
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181 return [[session.firewall_marked_]]..idsafe(name)..[[ = current_timestamp;]], { "timestamp" }; |
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182 end |
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183 |
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184 function action_handlers.UNMARK_ORIGIN(name) |
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185 return [[session.firewall_marked_]]..idsafe(name)..[[ = nil;]] |
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186 end |
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187 |
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188 return action_handlers; |