1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
|
--!A cross-platform build utility based on Lua
--
-- Licensed under the Apache License, Version 2.0 (the "License");
-- you may not use this file except in compliance with the License.
-- You may obtain a copy of the License at
--
-- http://www.apache.org/licenses/LICENSE-2.0
--
-- Unless required by applicable law or agreed to in writing, software
-- distributed under the License is distributed on an "AS IS" BASIS,
-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-- See the License for the specific language governing permissions and
-- limitations under the License.
--
-- Copyright (C) 2015 - 2019, TBOOX Open Source Group.
--
-- @author ruki
-- @file socket.lua
--
-- define module
local socket = socket or {}
local _instance = _instance or {}
-- load modules
local io = require("base/io")
local table = require("base/table")
local string = require("base/string")
-- the socket types
socket.TCP = 1
socket.UDP = 2
socket.ICMP = 3
-- the socket families
socket.IPV4 = 1
socket.IPV6 = 2
-- the socket events
socket.EV_RECV = 1
socket.EV_SEND = 2
socket.EV_CONN = socket.EV_SEND
socket.EV_ACPT = socket.EV_RECV
-- new a socket
function _instance.new(socktype, family, sock)
local instance = table.inherit(_instance)
instance._SOCK = sock
instance._TYPE = socktype
instance._FAMILY = family
setmetatable(instance, _instance)
return instance
end
-- get socket type
function _instance:type()
return self._TYPE
end
-- get socket family
function _instance:family()
return self._FAMILY
end
-- get socket rawfd
function _instance:rawfd()
-- ensure opened
local ok, errors = self:_ensure_opened()
if not ok then
return nil, errors
end
-- get rawfd
local result, errors = io.socket_rawfd(self._SOCK)
if not result and errors then
errors = string.format("%s: %s", self, errors)
end
return result, errors
end
-- bind socket
function _instance:bind(addr, port)
-- ensure opened
local ok, errors = self:_ensure_opened()
if not ok then
return -1, errors
end
-- bind it
local result, errors = io.socket_bind(self._SOCK, addr, port, self:family())
if not result and errors then
errors = string.format("%s: %s", self, errors)
end
return result, errors
end
-- listen socket
function _instance:listen(backlog)
-- ensure opened
local ok, errors = self:_ensure_opened()
if not ok then
return -1, errors
end
-- listen it
local result, errors = io.socket_listen(self._SOCK, backlog or 10)
if not result and errors then
errors = string.format("%s: %s", self, errors)
end
return result, errors
end
-- accept socket
function _instance:accept()
-- ensure opened
local ok, errors = self:_ensure_opened()
if not ok then
return -1, errors
end
-- accept it
local result, errors = io.socket_accept(self._SOCK)
if not result and errors then
errors = string.format("%s: %s", self, errors)
end
return result, errors
end
-- connect socket
function _instance:connect(addr, port)
-- ensure opened
local ok, errors = self:_ensure_opened()
if not ok then
return -1, errors
end
-- connect it
local result, errors = io.socket_connect(self._SOCK, addr, port, self:family())
if result < 0 and errors then
errors = string.format("%s: %s", self, errors)
end
return result, errors
end
-- wait socket events
function _instance:wait(events, timeout)
-- ensure opened
local ok, errors = self:_ensure_opened()
if not ok then
return -1, errors
end
-- wait it
local result, errors = io.socket_wait(self._SOCK, events, timeout or -1)
if result < 0 and errors then
errors = string.format("%s: %s", self, errors)
end
return result, errors
end
-- close socket
function _instance:close()
-- ensure opened
local ok, errors = self:_ensure_opened()
if not ok then
return false, errors
end
-- close it
ok = io.socket_close(self._SOCK)
if ok then
self._SOCK = nil
end
return ok
end
-- ensure the socket is opened
function _instance:_ensure_opened()
if not self._SOCK then
return false, string.format("%s: has been closed!", self)
end
return true
end
-- tostring(socket)
function _instance:__tostring()
local rawfd = self:rawfd() or "closed"
local types = {"tcp", "udp", "icmp"}
return string.format("<socket: %s%s/%s>", types[self:type()], self:family() == socket.IPV6 and "6" or "4", rawfd)
end
-- gc(socket)
function _instance:__gc()
if self._SOCK and io.socket_close(self._SOCK) then
self._SOCK = nil
end
end
-- open a socket
--
-- @param socktype the socket type, e.g. tcp, udp, icmp
-- @param family the address family, e.g. ipv4, ipv6
--
-- @return the socket instance
--
function socket.open(socktype, family)
socktype = socktype or socket.TCP
family = family or socket.IPV4
local sock, errors = io.socket_open(socktype, family)
if sock then
return _instance.new(socktype, family, sock)
else
return nil, errors or string.format("failed to open socket(%s/%s)!", socktype, family)
end
end
-- return module
return socket
|
