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35c128b42509
doc/net.server.lua

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doc/net.server.lua @ 9306:35c128b42509

net.server_epoll: Factor Direct TLS handling out of connection initialization Eventually it should be possible to create a socket that has a TLS context but that does not automatically start TLS on connect.
author Kim Alvefur <zash@zash.se>
date Thu, 13 Sep 2018 17:28:50 +0200
parent 9295:6c7d2fb0d369
child 9846:9a0da809ed4a
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1 -- Prosody IM
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2 -- Copyright (C) 2014,2016 Daurnimator
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3 --
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4 -- This project is MIT/X11 licensed. Please see the
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5 -- COPYING file in the source package for more information.
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6
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8
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9 --[[
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10 This file is a template for writing a net.server compatible backend.
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11 ]]
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12
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13 --[[
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14 Read patterns (also called modes) can be one of:
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15 - "*a": Read as much as possible
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16 - "*l": Read until end of line
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17 ]]
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18
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19 --- Handle API
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20 local handle_mt = {};
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21 local handle_methods = {};
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22 handle_mt.__index = handle_methods;
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23
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24 function handle_methods:set_mode(new_pattern)
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25 end
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26
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27 function handle_methods:setlistener(listeners)
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28 end
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29
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30 function handle_methods:setoption(option, value)
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31 end
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33 function handle_methods:ip()
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34 end
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35
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36 function handle_methods:starttls(sslctx)
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37 end
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38
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39 function handle_methods:write(data)
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40 end
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41
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42 function handle_methods:close()
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43 end
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44
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45 function handle_methods:pause()
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46 end
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47
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48 function handle_methods:resume()
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49 end
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50
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51 --[[
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52 Returns
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53 - socket: the socket object underlying this handle
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54 ]]
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55 function handle_methods:socket()
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56 end
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57
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58 --[[
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59 Returns
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60 - boolean: if an ssl context has been set on this handle
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61 ]]
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62 function handle_methods:ssl()
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63 end
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64
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65
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66 --- Listeners API
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67 local listeners = {}
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68
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69 --[[ connect
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70 Called when a client socket has established a connection with it's peer
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72 function listeners.onconnect(handle)
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73 end
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74
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75 --[[ incoming
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76 Called when data is received
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77 If reading data failed this will be called with `nil, "error message"`
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79 function listeners.onincoming(handle, buff, err)
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80 end
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81
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82 --[[ status
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83 Known statuses:
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84 - "ssl-handshake-complete"
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85 ]]
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86 function listeners.onstatus(handle, status)
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87 end
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88
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89 --[[ disconnect
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90 Called when the peer has closed the connection
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91 ]]
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92 function listeners.ondisconnect(handle)
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93 end
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94
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95 --[[ drain
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96 Called when the handle's write buffer is empty
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97 ]]
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98 function listeners.ondrain(handle)
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99 end
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100
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101 --[[ readtimeout
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102 Called when a socket inactivity timeout occurs
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103 ]]
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104 function listeners.onreadtimeout(handle)
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105 end
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106
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107 --[[ detach: Called when other listeners are going to be removed
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108 Allows for clean-up
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109 ]]
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110 function listeners.ondetach(handle)
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111 end
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112
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113 --- Top level functions
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114
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115 --[[ Returns the syscall level event mechanism in use.
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116
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117 Returns:
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118 - backend: e.g. "select", "epoll"
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119 ]]
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120 local function get_backend()
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121 end
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122
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123 --[[ Starts the event loop.
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124
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125 Returns:
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126 - "quitting"
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127 ]]
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128 local function loop()
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129 end
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130
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131 --[[ Stop a running loop()
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132 ]]
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133 local function setquitting(quit)
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134 end
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135
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136
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137 --[[ Links to two handles together, so anything written to one is piped to the other
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138
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139 Arguments:
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140 - sender, receiver: handles to link
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141 - buffersize: maximum #bytes until sender will be locked
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142 ]]
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143 local function link(sender, receiver, buffersize)
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144 end
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145
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146 --[[ Binds and listens on the given address and port
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147 If `sslctx` is given, the connecting clients will have to negotiate an SSL session
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148
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149 Arguments:
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150 - address: address to bind to, may be "*" to bind all addresses. will be resolved if it is a string.
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151 - port: port to bind (as number)
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152 - listeners: a table of listeners
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153 - pattern: the read pattern
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154 - sslctx: is a valid luasec constructor
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155
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156 Returns:
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157 - handle
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158 - nil, "an error message": on failure (e.g. out of file descriptors)
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159 ]]
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160 local function addserver(address, port, listeners, pattern, sslctx)
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161 end
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162
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163 --[[ Wraps a lua-socket socket client socket in a handle.
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164 The socket must be already connected to the remote end.
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165 If `sslctx` is given, a SSL session will be negotiated before listeners are called.
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166
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167 Arguments:
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168 - socket: the lua-socket object to wrap
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169 - ip: returned by `handle:ip()`
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170 - port:
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171 - listeners: a table of listeners
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172 - pattern: the read pattern
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173 - sslctx: is a valid luasec constructor
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174 - typ: the socket type, one of:
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175 - "tcp"
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176 - "tcp6"
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177 - "udp"
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178
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179 Returns:
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180 - handle, socket
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181 - nil, "an error message": on failure (e.g. )
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182 ]]
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183 local function wrapclient(socket, ip, serverport, listeners, pattern, sslctx)
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184 end
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185
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186 --[[ Connects to the given address and port
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187 If `sslctx` is given, a SSL session will be negotiated before listeners are called.
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188
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189 Arguments:
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190 - address: address to connect to. will be resolved if it is a string.
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191 - port: port to connect to (as number)
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192 - listeners: a table of listeners
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193 - pattern: the read pattern
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194 - sslctx: is a valid luasec constructor
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195 - typ: the socket type, one of:
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196 - "tcp"
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197 - "tcp6"
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198 - "udp"
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199
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200 Returns:
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201 - handle
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202 - nil, "an error message": on failure (e.g. out of file descriptors)
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203 ]]
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204 local function addclient(address, port, listeners, pattern, sslctx, typ)
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205 end
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206
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207 --[[ Close all handles
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208 ]]
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209 local function closeall()
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210 end
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211
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212 --[[ The callback should be called after `delay` seconds.
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213 The callback should be called with the time at the point of firing.
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214 If the callback returns a number, it should be called again after that many seconds.
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215
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216 Arguments:
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217 - delay: number of seconds to wait
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218 - callback: function to call.
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219 ]]
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220 local function add_task(delay, callback)
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221 end
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222
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223 --[[ Adds a handler for when a signal is fired.
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224 Optional to implement
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225 callback does not take any arguments
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226
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227 Arguments:
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228 - signal_id: the signal id (as number) to listen for
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229 - handler: callback
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230 ]]
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231 local function hook_signal(signal_id, handler)
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232 end
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233
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234 --[[ Adds a low-level FD watcher
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235 Arguments:
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236 - fd_number: A non-negative integer representing a file descriptor or
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237 object with a :getfd() method returning one
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238 - on_readable: Optional callback for when the FD is readable
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239 - on_writable: Optional callback for when the FD is writable
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240
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241 Returns:
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242 - net.server handle
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243 ]]
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244 local function watchfd(fd_number, on_readable, on_writable)
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245 end
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246
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247 return {
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248 get_backend = get_backend;
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249 loop = loop;
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250 setquitting = setquitting;
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251 link = link;
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252 addserver = addserver;
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253 wrapclient = wrapclient;
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254 addclient = addclient;
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255 closeall = closeall;
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256 hook_signal = hook_signal;
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257 watchfd = watchfd;
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258 }