Mercurial > prosody-modules
annotate mod_onions/mod_onions.lua @ 4562:28c16c93d79a
mod_limits_exception: New module to except some JIDs from rate limiting
author | Matthew Wild <mwild1@gmail.com> |
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date | Mon, 24 May 2021 15:46:11 +0100 |
parents | 824b0d7fa883 |
children | 44be2c6087f3 |
rev | line source |
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1780
b3e3ad35391a
mod_onions: Small fixes making bounce_sendq match mod_s2s again.
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1 local prosody = prosody; |
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2 local core_process_stanza = prosody.core_process_stanza; |
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3 |
2880
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mod_onions: Use net.server API for creating a new connection instead of duplicating socket creation
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4 local addclient = require "net.server".addclient; |
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5 local s2s_new_outgoing = require "core.s2smanager".new_outgoing; |
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6 local initialize_filters = require "util.filters".initialize; |
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7 local st = require "util.stanza"; |
1071
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8 |
1060
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9 local portmanager = require "core.portmanager"; |
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10 |
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11 local softreq = require "util.dependencies".softreq; |
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12 |
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13 local bit; |
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14 pcall(function() bit = require"bit"; end); |
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15 bit = bit or softreq"bit32" |
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16 if not bit then module:log("error", "No bit module found. Either LuaJIT 2, lua-bitop or Lua 5.2 is required"); end |
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17 |
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18 local band = bit.band; |
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19 local rshift = bit.rshift; |
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20 local lshift = bit.lshift; |
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21 |
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22 local byte = string.byte; |
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23 local c = string.char; |
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24 |
1617
e0d8caffa209
mod_onions: Depend on mod_s2s to avoid a traceback when loaded before mod_s2s
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25 module:depends("s2s"); |
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26 |
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mod_onions: Use typed config API
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27 local proxy_ip = module:get_option_string("onions_socks5_host", "127.0.0.1"); |
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28 local proxy_port = module:get_option_number("onions_socks5_port", 9050); |
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29 local forbid_else = module:get_option_boolean("onions_only", false); |
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30 local torify_all = module:get_option_boolean("onions_tor_all", false); |
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31 local onions_map = module:get_option("onions_map", {}); |
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32 |
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33 local sessions = module:shared("sessions"); |
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34 |
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35 -- The socks5listener handles connection while still connecting to the proxy, |
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36 -- then it hands them over to the normal listener (in mod_s2s) |
1061
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mod_onions: The SOCKS5 port is now a string, as it should be. Added a boolean option onions_tor_all to pass all s2s traffic through Tor.
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37 local socks5listener = { default_port = proxy_port, default_mode = "*a", default_interface = "*" }; |
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38 |
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39 local function socks5_connect_sent(conn, data) |
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all the things: Remove trailing whitespace
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40 |
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41 local session = sessions[conn]; |
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42 |
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43 if #data < 5 then |
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44 session.socks5_buffer = data; |
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45 return; |
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46 end |
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47 |
2704
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mod_onions: Make variable local
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48 local request_status = byte(data, 2); |
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49 |
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50 if not request_status == 0x00 then |
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51 module:log("debug", "Failed to connect to the SOCKS5 proxy. :("); |
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52 session:close(false); |
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53 return; |
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54 end |
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55 |
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mod_onions: Fix typo [codespell]
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56 module:log("debug", "Successfully connected to SOCKS5 proxy."); |
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57 |
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58 local response = byte(data, 4); |
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59 |
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60 if response == 0x01 then |
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61 if #data < 10 then |
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62 -- let's try again when we have enough |
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63 session.socks5_buffer = data; |
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64 return; |
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65 end |
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66 |
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67 -- this means the server tells us to connect on an IPv4 address |
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68 local ip = string.format("%d.%d.%d.%d", byte(data, 5,8)); |
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69 local port = band(byte(data, 9), lshift(byte(data, 10), 8)); |
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70 module:log("debug", "Should connect to: %s:%d", ip, port); |
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71 |
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72 if not (ip == "0.0.0.0" and port == 0) then |
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73 module:log("debug", "The SOCKS5 proxy tells us to connect to a different IP, don't know how. :("); |
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74 session:close(false); |
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75 return; |
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76 end |
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77 |
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78 -- Now the real s2s listener can take over the connection. |
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79 local listener = portmanager.get_service("s2s").listener; |
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80 |
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81 module:log("debug", "SOCKS5 done, handing over listening to "..tostring(listener)); |
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82 |
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83 session.socks5_handler = nil; |
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84 session.socks5_buffer = nil; |
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85 |
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86 local w, log = conn.send, session.log; |
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87 |
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88 local filter = initialize_filters(session); |
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89 |
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90 session.version = 1; |
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91 |
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92 session.sends2s = function (t) |
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93 log("debug", "sending (s2s over socks5): %s", (t.top_tag and t:top_tag()) or t:match("^[^>]*>?")); |
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94 if t.name then |
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95 t = filter("stanzas/out", t); |
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96 end |
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97 if t then |
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98 t = filter("bytes/out", tostring(t)); |
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99 if t then |
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100 return conn:write(tostring(t)); |
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101 end |
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102 end |
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103 end |
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104 |
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105 session.open_stream = function () |
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106 session.sends2s(st.stanza("stream:stream", { |
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107 xmlns='jabber:server', ["xmlns:db"]='jabber:server:dialback', |
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108 ["xmlns:stream"]='http://etherx.jabber.org/streams', |
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109 from=session.from_host, to=session.to_host, version='1.0', ["xml:lang"]='en'}):top_tag()); |
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110 end |
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111 |
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112 conn.setlistener(conn, listener); |
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113 |
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114 listener.register_outgoing(conn, session); |
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115 |
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116 listener.onconnect(conn); |
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117 end |
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118 end |
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119 |
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120 local function socks5_handshake_sent(conn, data) |
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121 |
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122 local session = sessions[conn]; |
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123 |
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124 if #data < 2 then |
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125 session.socks5_buffer = data; |
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126 return; |
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127 end |
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128 |
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129 -- version, method |
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130 local request_status = byte(data, 2); |
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131 |
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132 module:log("debug", "SOCKS version: "..byte(data, 1)); |
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133 module:log("debug", "Response: "..request_status); |
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134 |
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135 if not request_status == 0x00 then |
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136 module:log("debug", "Failed to connect to the SOCKS5 proxy. :( It seems to require authentication."); |
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137 session:close(false); |
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138 return; |
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139 end |
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140 |
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141 module:log("debug", "Sending connect message."); |
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142 |
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143 -- version 5, connect, (reserved), type: domainname, (length, hostname), port |
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144 conn:write(c(5) .. c(1) .. c(0) .. c(3) .. c(#session.socks5_to) .. session.socks5_to); |
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145 conn:write(c(rshift(session.socks5_port, 8)) .. c(band(session.socks5_port, 0xff))); |
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146 |
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147 session.socks5_handler = socks5_connect_sent; |
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148 end |
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149 |
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150 function socks5listener.onconnect(conn) |
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151 module:log("debug", "Connected to SOCKS5 proxy, sending SOCKS5 handshake."); |
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152 |
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153 -- Socks version 5, 1 method, no auth |
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154 conn:write(c(5) .. c(1) .. c(0)); |
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155 |
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156 sessions[conn].socks5_handler = socks5_handshake_sent; |
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157 end |
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158 |
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159 function socks5listener.register_outgoing(conn, session) |
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160 session.direction = "outgoing"; |
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161 sessions[conn] = session; |
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162 end |
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163 |
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164 function socks5listener.ondisconnect(conn, err) |
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165 sessions[conn] = nil; |
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166 end |
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167 |
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168 function socks5listener.onincoming(conn, data) |
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169 local session = sessions[conn]; |
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170 |
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171 if session.socks5_buffer then |
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172 data = session.socks5_buffer .. data; |
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173 end |
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174 |
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175 if session.socks5_handler then |
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176 session.socks5_handler(conn, data); |
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177 end |
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178 end |
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179 |
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180 local function connect_socks5(host_session, connect_host, connect_port) |
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181 |
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182 module:log("debug", "Connecting to " .. connect_host .. ":" .. connect_port); |
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183 |
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184 -- this is not necessarily the same as .to_host (it can be that this is from the onions_map) |
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185 host_session.socks5_to = connect_host; |
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186 host_session.socks5_port = connect_port; |
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187 |
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188 local conn = addclient(proxy_ip, proxy_port, socks5listener, "*a"); |
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189 |
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190 socks5listener.register_outgoing(conn, host_session); |
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191 |
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192 host_session.conn = conn; |
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193 end |
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194 |
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195 local bouncy_stanzas = { message = true, presence = true, iq = true }; |
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196 local function bounce_sendq(session, reason) |
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197 local sendq = session.sendq; |
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198 if not sendq then return; end |
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199 session.log("info", "Sending error replies for "..#sendq.." queued stanzas because of failed outgoing connection to "..tostring(session.to_host)); |
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200 local dummy = { |
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201 type = "s2sin"; |
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202 send = function(s) |
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203 (session.log or log)("error", "Replying to to an s2s error reply, please report this! Traceback: %s", debug.traceback()); |
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204 end; |
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205 dummy = true; |
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206 }; |
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207 for i, data in ipairs(sendq) do |
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208 local reply = data[2]; |
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209 if reply and not(reply.attr.xmlns) and bouncy_stanzas[reply.name] then |
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210 reply.attr.type = "error"; |
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211 reply:tag("error", {type = "cancel"}) |
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212 :tag("remote-server-not-found", {xmlns = "urn:ietf:params:xml:ns:xmpp-stanzas"}):up(); |
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213 if reason then |
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214 reply:tag("text", {xmlns = "urn:ietf:params:xml:ns:xmpp-stanzas"}) |
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215 :text("Server-to-server connection failed: "..reason):up(); |
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216 end |
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217 core_process_stanza(dummy, reply); |
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218 end |
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219 sendq[i] = nil; |
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220 end |
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221 session.sendq = nil; |
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222 end |
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223 -- Try to intercept anything to *.onion |
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224 local function route_to_onion(event) |
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225 local stanza = event.stanza; |
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226 local to_host = event.to_host; |
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227 local onion_host = nil; |
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228 local onion_port = nil; |
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229 |
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230 if not to_host:find("%.onion$") then |
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231 if onions_map[to_host] then |
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232 if type(onions_map[to_host]) == "string" then |
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233 onion_host = onions_map[to_host]; |
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234 else |
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235 onion_host = onions_map[to_host].host; |
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236 onion_port = onions_map[to_host].port; |
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237 end |
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238 elseif forbid_else then |
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239 module:log("debug", event.to_host .. " is not an onion. Blocking it."); |
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240 return false; |
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241 elseif not torify_all then |
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242 return; |
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243 end |
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244 end |
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245 |
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246 module:log("debug", "Onion routing something to ".. to_host); |
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247 |
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248 if hosts[event.from_host].s2sout[to_host] then |
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249 return; |
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250 end |
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251 |
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252 local host_session = s2s_new_outgoing(event.from_host, to_host); |
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253 |
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254 host_session.bounce_sendq = bounce_sendq; |
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255 host_session.sendq = { {tostring(stanza), stanza.attr and stanza.attr.type ~= "error" and stanza.attr.type ~= "result" and st.reply(stanza)} }; |
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256 |
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257 hosts[event.from_host].s2sout[to_host] = host_session; |
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258 |
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259 connect_socks5(host_session, onion_host or to_host, onion_port or 5269); |
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260 |
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261 return true; |
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262 end |
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263 |
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264 module:log("debug", "Onions ready and loaded"); |
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265 |
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266 module:hook("route/remote", route_to_onion, 200); |
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267 |
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268 module:hook_global("s2s-check-certificate", function (event) |
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269 local host = event.host; |
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270 if host and host:find("%.onion$") then |
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271 return true; |
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272 end |
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273 end); |
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274 |