prosody-modules
9a62780e7ee2
mod_net_proxy/mod_net_proxy.lua

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mod_net_proxy/mod_net_proxy.lua @ 2930:9a62780e7ee2

mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
author Pascal Mathis <mail@pascalmathis.com>
date Thu, 15 Mar 2018 15:26:30 +0100
child 2931:e79b9a55aa2e
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2930
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1 -- mod_net_proxy.lua
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2 -- Copyright (C) 2018 Pascal Mathis <mail@pascalmathis.com>
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3 --
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4 -- Implementation of PROXY protocol versions 1 and 2
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5 -- Specifications: https://www.haproxy.org/download/1.8/doc/proxy-protocol.txt
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6
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7 module:set_global();
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8
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9 -- Imports
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10 local softreq = require "util.dependencies".softreq;
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11 local bit = assert(softreq "bit" or softreq "bit32", "No bit module found. See https://prosody.im/doc/depends#bitop");
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12 local hex = require "util.hex";
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13 local ip = require "util.ip";
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14 local net = require "util.net";
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15 local portmanager = require "core.portmanager";
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16
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17 -- Utility Functions
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18 local function _table_invert(input)
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19 local output = {};
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20 for key, value in pairs(input) do
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21 output[value] = key;
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22 end
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23 return output;
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24 end
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25
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26 -- Constants
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27 local ADDR_FAMILY = { UNSPEC = 0x0, INET = 0x1, INET6 = 0x2, UNIX = 0x3 };
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28 local ADDR_FAMILY_STR = _table_invert(ADDR_FAMILY);
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29 local TRANSPORT = { UNSPEC = 0x0, STREAM = 0x1, DGRAM = 0x2 };
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30 local TRANSPORT_STR = _table_invert(TRANSPORT);
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31
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32 local PROTO_MAX_HEADER_LENGTH = 256;
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33 local PROTO_HANDLERS = {
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34 PROXYv1 = { signature = hex.from("50524F5859"), callback = nil },
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35 PROXYv2 = { signature = hex.from("0D0A0D0A000D0A515549540A"), callback = nil }
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36 };
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37 local PROTO_HANDLER_STATUS = { SUCCESS = 0, POSTPONE = 1, FAILURE = 2 };
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38
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39 -- Persistent In-Memory Storage
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40 local sessions = {};
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41 local mappings = {};
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42
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43 -- Proxy Data Methods
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44 local proxy_data_mt = {}; proxy_data_mt.__index = proxy_data_mt;
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45
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46 function proxy_data_mt:describe()
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47 return string.format("proto=%s/%s src=%s:%d dst=%s:%d",
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48 self:addr_family_str(), self:transport_str(), self:src_addr(), self:src_port(), self:dst_addr(), self:dst_port());
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49 end
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50
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51 function proxy_data_mt:addr_family_str()
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52 return ADDR_FAMILY_STR[self._addr_family] or ADDR_FAMILY_STR[ADDR_FAMILY.UNSPEC];
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53 end
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54
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55 function proxy_data_mt:transport_str()
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56 return TRANSPORT_STR[self._transport] or TRANSPORT_STR[TRANSPORT.UNSPEC];
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57 end
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58
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59 function proxy_data_mt:version()
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60 return self._version;
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61 end
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62
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63 function proxy_data_mt:addr_family()
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64 return self._addr_family;
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65 end
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66
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67 function proxy_data_mt:transport()
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68 return self._transport;
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69 end
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70
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71 function proxy_data_mt:src_addr()
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72 return self._src_addr;
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73 end
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74
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75 function proxy_data_mt:src_port()
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76 return self._src_port;
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77 end
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78
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79 function proxy_data_mt:dst_addr()
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80 return self._dst_addr;
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81 end
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82
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83 function proxy_data_mt:dst_port()
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84 return self._dst_port;
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85 end
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86
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87 -- Protocol Handler Functions
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88 PROTO_HANDLERS["PROXYv1"].callback = function(conn, session)
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89 local addr_family_mappings = { TCP4 = ADDR_FAMILY.INET, TCP6 = ADDR_FAMILY.INET6 };
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90
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91 -- Postpone processing if CRLF (PROXYv1 header terminator) does not exist within buffer
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92 if session.buffer:find("\r\n") == nil then
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93 return PROTO_HANDLER_STATUS.POSTPONE, nil;
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94 end
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95
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96 -- Declare header pattern and match current buffer against pattern
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97 local header_pattern = "^PROXY (%S+) (%S+) (%S+) (%d+) (%d+)\r\n";
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98 local addr_family, src_addr, dst_addr, src_port, dst_port = session.buffer:match(header_pattern);
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99 src_port, dst_port = tonumber(src_port), tonumber(dst_port);
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100
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101 -- Ensure that header was successfully parsed and contains a valid address family
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102 if addr_family == nil or src_addr == nil or dst_addr == nil or src_port == nil or dst_port == nil then
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103 module:log("warn", "Received unparseable PROXYv1 header from %s", conn:ip());
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104 return PROTO_HANDLER_STATUS.FAILURE, nil;
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105 end
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106 if addr_family_mappings[addr_family] == nil then
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107 module:log("warn", "Received invalid PROXYv1 address family from %s: %s", conn:ip(), addr_family);
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108 return PROTO_HANDLER_STATUS.FAILURE, nil;
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109 end
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110
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111 -- Ensure that received source and destination ports are within 1 and 65535 (0xFFFF)
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112 if src_port <= 0 or src_port >= 0xFFFF then
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113 module:log("warn", "Received invalid PROXYv1 source port from %s: %d", conn:ip(), src_port);
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114 return PROTO_HANDLER_STATUS.FAILURE, nil;
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115 end
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116 if dst_port <= 0 or dst_port >= 0xFFFF then
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117 module:log("warn", "Received invalid PROXYv1 destination port from %s: %d", conn:ip(), dst_port);
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118 return PROTO_HANDLER_STATUS.FAILURE, nil;
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119 end
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120
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121 -- Ensure that received source and destination address can be parsed
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122 local _, err = ip.new_ip(src_addr);
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
123 if err ~= nil then
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
124 module:log("warn", "Received unparseable PROXYv1 source address from %s: %s", conn:ip(), src_addr);
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
125 end
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
126 _, err = ip.new_ip(dst_addr);
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
127 if err ~= nil then
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
128 module:log("warn", "Received unparseable PROXYv1 destination address from %s: %s", conn:ip(), dst_addr);
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
129 return PROTO_HANDLER_STATUS.FAILURE, nil;
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
130 end
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
131
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
132 -- Strip parsed header from session buffer and build proxy data
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
133 session.buffer = session.buffer:gsub(header_pattern, "");
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
134
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
135 local proxy_data = {
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
136 _version = 1,
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
137 _addr_family = addr_family, _transport = TRANSPORT.STREAM,
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
138 _src_addr = src_addr, _src_port = src_port,
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
139 _dst_addr = dst_addr, _dst_port = dst_port
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
140 };
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
141 setmetatable(proxy_data, proxy_data_mt);
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
142
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
143 -- Return successful response with gathered proxy data
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
144 return PROTO_HANDLER_STATUS.SUCCESS, proxy_data;
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
145 end
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
146
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
147 PROTO_HANDLERS["PROXYv2"].callback = function(conn, session)
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
148 -- Postpone processing if less than 16 bytes are available
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
149 if #session.buffer < 16 then
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
150 return PROTO_HANDLER_STATUS.POSTPONE, nil;
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
151 end
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
152
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
153 -- Parse first 16 bytes of protocol header
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
154 local version = bit.rshift(bit.band(session.buffer:byte(13), 0xF0), 4);
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
155 local command = bit.band(session.buffer:byte(13), 0x0F);
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
156 local addr_family = bit.rshift(bit.band(session.buffer:byte(14), 0xF0), 4);
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
157 local transport = bit.band(session.buffer:byte(14), 0x0F);
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
158 local length = bit.bor(session.buffer:byte(16), bit.lshift(session.buffer:byte(15), 8));
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
159
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
160 -- Postpone processing if less than 16+<length> bytes are available
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
161 if #session.buffer < 16 + length then
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
162 return PROTO_HANDLER_STATUS.POSTPONE, nil;
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
163 end
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
164
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
165 -- Ensure that version number is correct
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
166 if version ~= 0x2 then
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
167 module:log("error", "Received unsupported PROXYv2 version from %s: %d", conn:ip(), version);
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
168 return PROTO_HANDLER_STATUS.FAILURE, nil;
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
169 end
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
170
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
171 local payload = session.buffer:sub(17);
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
172 if command == 0x0 then
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
173 -- Gather source/destination addresses and ports from local socket
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
174 local src_addr, src_port = conn:socket():getpeername();
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
175 local dst_addr, dst_port = conn:socket():getsockname();
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
176
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
177 -- Build proxy data based on real connection information
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
178 local proxy_data = {
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
179 _version = version,
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
180 _addr_family = addr_family, _transport = transport,
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
181 _src_addr = src_addr, _src_port = src_port,
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
182 _dst_addr = dst_addr, _dst_port = dst_port
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
183 };
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
184 setmetatable(proxy_data, proxy_data_mt);
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
185
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
186 -- Return successful response with gathered proxy data
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
187 return PROTO_HANDLER_STATUS.SUCCESS, proxy_data;
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
188 elseif command == 0x1 then
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
189 local offset = 1;
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
190 local src_addr, src_port, dst_addr, dst_port;
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
191
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
192 -- Verify transport protocol is either STREAM or DGRAM
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
193 if transport ~= TRANSPORT.STREAM and transport ~= TRANSPORT.DGRAM then
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
194 module:log("warn", "Received unsupported PROXYv2 transport from %s: 0x%02X", conn:ip(), transport);
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
195 return PROTO_HANDLER_STATUS.FAILURE, nil;
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
196 end
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
197
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
198 -- Parse source and destination addresses
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
199 if addr_family == ADDR_FAMILY.INET then
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
200 src_addr = net.ntop(payload:sub(offset, offset + 3)); offset = offset + 4;
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
201 dst_addr = net.ntop(payload:sub(offset, offset + 3)); offset = offset + 4;
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
202 elseif addr_family == ADDR_FAMILY.INET6 then
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
203 src_addr = net.ntop(payload:sub(offset, offset + 15)); offset = offset + 16;
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
204 dst_addr = net.ntop(payload:sub(offset, offset + 15)); offset = offset + 16;
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
205 elseif addr_family == ADDR_FAMILY.UNIX then
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
206 src_addr = payload:sub(offset, offset + 107); offset = offset + 108;
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
207 dst_addr = payload:sub(offset, offset + 107); offset = offset + 108;
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
208 end
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
209
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
210 -- Parse source and destination ports
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
211 if addr_family == ADDR_FAMILY.INET or addr_family == ADDR_FAMILY.INET6 then
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
212 src_port = bit.bor(payload:byte(offset + 1), bit.lshift(payload:byte(offset), 8)); offset = offset + 2;
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
213 -- luacheck: ignore 311
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
214 dst_port = bit.bor(payload:byte(offset + 1), bit.lshift(payload:byte(offset), 8)); offset = offset + 2;
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
215 end
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
216
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
217 -- Strip parsed header from session buffer and build proxy data
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
218 session.buffer = session.buffer:sub(17 + length);
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
219
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
220 local proxy_data = {
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
221 _version = version,
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
222 _addr_family = addr_family, _transport = transport,
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
223 _src_addr = src_addr, _src_port = src_port,
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
224 _dst_addr = dst_addr, _dst_port = dst_port
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
225 };
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
226 setmetatable(proxy_data, proxy_data_mt);
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
227
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
228 -- Return successful response with gathered proxy data
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
229 return PROTO_HANDLER_STATUS.SUCCESS, proxy_data;
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
230 else
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
231 module:log("error", "Received unsupported PROXYv2 command from %s: 0x%02X", conn:ip(), command);
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
232 return PROTO_HANDLER_STATUS.FAILURE, nil;
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
233 end
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
234 end
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
235
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
236 -- Wrap an existing connection with the provided proxy data. This will override several methods of the 'conn' object to
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
237 -- return the proxied source instead of the source which initiated the TCP connection. Afterwards, the listener of the
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
238 -- connection gets set according to the globally defined port<>service mappings and the methods 'onconnect' and
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
239 -- 'onincoming' are being called manually with the current session buffer.
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
240 local function wrap_proxy_connection(conn, session, proxy_data)
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
241 -- Override and add functions of 'conn' object when source information has been collected
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
242 conn.proxyip, conn.proxyport = conn.ip, conn.port;
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
243 if proxy_data:src_addr() ~= nil and proxy_data:src_port() ~= nil then
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
244 conn.ip = function()
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
245 return proxy_data:src_addr();
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
246 end
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
247 conn.port = function()
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
248 return proxy_data:src_port();
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
249 end
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
250 conn.clientport = conn.port;
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
251 end
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
252
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
253 -- Attempt to find service by processing port<>service mappings
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
254 local mapping = mappings[conn:serverport()];
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
255 if mapping == nil then
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
256 conn:close();
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
257 module:log("error", "Connection %s@%s terminated: Could not find mapping for port %d",
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
258 conn:ip(), conn:proxyip(), conn:serverport());
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
259 return;
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
260 end
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
261
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
262 if mapping.service == nil then
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
263 local service = portmanager.get_service(mapping.service_name);
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
264
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
265 if service ~= nil then
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
266 mapping.service = service;
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
267 else
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
268 conn:close();
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
269 module:log("error", "Connection %s@%s terminated: Could not process mapping for unknown service %s",
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
270 conn:ip(), conn:proxyip(), mapping.service_name);
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
271 return;
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
272 end
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
273 end
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
274
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
275 -- Pass connection to actual service listener and simulate onconnect/onincoming callbacks
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
276 local service_listener = mapping.service.listener;
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
277
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
278 module:log("info", "Passing proxied connection %s:%d to service %s", conn:ip(), conn:port(), mapping.service_name);
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
279 conn:setlistener(service_listener);
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
280 if service_listener.onconnect then
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
281 service_listener.onconnect(conn);
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
282 end
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
283 return service_listener.onincoming(conn, session.buffer);
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
284 end
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
285
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
286 -- Network Listener Methods
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
287 local listener = {};
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
288
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
289 function listener.onconnect(conn)
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
290 sessions[conn] = {
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
291 handler = nil;
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
292 buffer = nil;
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
293 };
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
294 end
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
295
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
296 function listener.onincoming(conn, data)
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
297 -- Abort processing if no data has been received
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
298 if not data then
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
299 return;
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
300 end
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
301
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
302 -- Lookup session for connection and append received data to buffer
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
303 local session = sessions[conn];
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
304 session.buffer = session.buffer and session.buffer .. data or data;
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
305
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
306 -- Attempt to determine protocol handler if not done previously
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
307 if session.handler == nil then
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
308 -- Match current session buffer against all known protocol signatures to determine protocol handler
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
309 for handler_name, handler in pairs(PROTO_HANDLERS) do
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
310 if session.buffer:find("^" .. handler.signature) ~= nil then
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
311 session.handler = handler.callback;
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
312 module:log("debug", "Detected %s connection from %s:%d", handler_name, conn:ip(), conn:port());
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
313 break;
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
314 end
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
315 end
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
316
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
317 -- Decide between waiting for a complete header signature or terminating the connection when no handler has been found
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
318 if session.handler == nil then
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
319 -- Terminate connection if buffer size has exceeded tolerable maximum size
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
320 if #session.buffer > PROTO_MAX_HEADER_LENGTH then
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
321 conn:close();
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
322 module:log("warn", "Connection %s:%d terminated: No valid PROXY header within %d bytes",
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
323 conn:ip(), conn:port(), PROTO_MAX_HEADER_LENGTH);
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
324 end
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
325
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
326 -- Skip further processing without a valid protocol handler
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
327 module:log("debug", "No valid header signature detected from %s:%d, waiting for more data...",
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
328 conn:ip(), conn:port());
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
329 return;
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
330 end
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
331 end
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
332
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
333 -- Execute proxy protocol handler and process response
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
334 local response, proxy_data = session.handler(conn, session);
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
335 if response == PROTO_HANDLER_STATUS.SUCCESS then
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
336 module:log("info", "Received PROXY header from %s: %s", conn:ip(), proxy_data:describe());
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
337 return wrap_proxy_connection(conn, session, proxy_data);
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
338 elseif response == PROTO_HANDLER_STATUS.POSTPONE then
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
339 module:log("debug", "Postponed parsing of incomplete PROXY header received from %s", conn:ip());
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
340 return;
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
341 elseif response == PROTO_HANDLER_STATUS.FAILURE then
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
342 conn:close();
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
343 module:log("warn", "Connection %s terminated: Could not process PROXY header from client, " +
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
344 "see previous log messages.", conn:ip());
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
345 return;
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
346 else
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
347 -- This code should be never reached, but is included for completeness
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
348 conn:close();
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
349 module:log("error", "Connection terminated: Received invalid protocol handler response with code %d", response);
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
350 return;
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
351 end
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
352 end
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
353
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
354 function listener.ondisconnect(conn)
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
355 sessions[conn] = nil;
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
356 end
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
357
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
358 listener.ondetach = listener.ondisconnect;
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
359
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
360 -- Initialize the module by processing all configured port mappings
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
361 local config_ports = module:get_option_set("proxy_ports", {});
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
362 local config_mappings = module:get_option("proxy_port_mappings", {});
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
363 for port in config_ports do
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
364 if config_mappings[port] ~= nil then
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
365 mappings[port] = {
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
366 service_name = config_mappings[port],
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
367 service = nil
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
368 };
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
369 else
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
370 module:log("warn", "No port<>service mapping found for port: %d", port);
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
371 end
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
372 end
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
373
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
diff changeset
374 -- Register the previously declared network listener
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
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375 module:provides("net", {
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
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376 name = "proxy";
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
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377 listener = listener;
9a62780e7ee2 mod_net_proxy: New module implementing PROXY protocol versions 1 and 2
Pascal Mathis <mail@pascalmathis.com>
parents:
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378 });