prosody
061d516d8ac5
net/websocket/frames.lua

Find changesets by keywords by author, files, the commit message, revision number or hash, or revset expression.

Software / code / prosody

Annotate

net/websocket/frames.lua @ 12077:061d516d8ac5

mod_smacks: Fix error on shutdown if loaded on Component
author Kim Alvefur <zash@zash.se>
date Mon, 20 Dec 2021 00:04:32 +0100
parent 11166:51e5149ed0ad
child 12386:2d3080d02960
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
6389
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
1 -- Prosody IM
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
2 -- Copyright (C) 2012 Florian Zeitz
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
3 -- Copyright (C) 2014 Daurnimator
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
4 --
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
5 -- This project is MIT/X11 licensed. Please see the
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
6 -- COPYING file in the source package for more information.
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
7 --
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
8
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
9 local softreq = require "util.dependencies".softreq;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
10 local random_bytes = require "util.random".bytes;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
11
10241
48f7cda4174d util.bitops: Library to find appropriate bitwise library (closes #1395)
Kim Alvefur <zash@zash.se>
parents: 9692
diff changeset
12 local bit = require "util.bitcompat";
6389
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
13 local band = bit.band;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
14 local bor = bit.bor;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
15 local lshift = bit.lshift;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
16 local rshift = bit.rshift;
11164
4e5a2af9dd19 net.websocket.frames: Use C string XOR implementation
Kim Alvefur <zash@zash.se>
parents: 11157
diff changeset
17 local sbit = require "util.strbitop";
4e5a2af9dd19 net.websocket.frames: Use C string XOR implementation
Kim Alvefur <zash@zash.se>
parents: 11157
diff changeset
18 local sxor = sbit.sxor;
6389
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
19
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
20 local s_char= string.char;
9692
affcbccc1dff lint: Remove use of the 143 error code
Kim Alvefur <zash@zash.se>
parents: 9691
diff changeset
21 local s_pack = string.pack;
affcbccc1dff lint: Remove use of the 143 error code
Kim Alvefur <zash@zash.se>
parents: 9691
diff changeset
22 local s_unpack = string.unpack;
6899
5f3da8b00b9b net.websocket.frames: Use struct packing in Lua 5.3 or struct lib if available
Kim Alvefur <zash@zash.se>
parents: 6898
diff changeset
23
5f3da8b00b9b net.websocket.frames: Use struct packing in Lua 5.3 or struct lib if available
Kim Alvefur <zash@zash.se>
parents: 6898
diff changeset
24 if not s_pack and softreq"struct" then
5f3da8b00b9b net.websocket.frames: Use struct packing in Lua 5.3 or struct lib if available
Kim Alvefur <zash@zash.se>
parents: 6898
diff changeset
25 s_pack = softreq"struct".pack;
5f3da8b00b9b net.websocket.frames: Use struct packing in Lua 5.3 or struct lib if available
Kim Alvefur <zash@zash.se>
parents: 6898
diff changeset
26 s_unpack = softreq"struct".unpack;
5f3da8b00b9b net.websocket.frames: Use struct packing in Lua 5.3 or struct lib if available
Kim Alvefur <zash@zash.se>
parents: 6898
diff changeset
27 end
6389
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
28
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
29 local function read_uint16be(str, pos)
11106
76f46c2579a2 net.websocket.frames: Allow all methods to work on non-string objects
Matthew Wild <mwild1@gmail.com>
parents: 8728
diff changeset
30 local l1, l2 = str:byte(pos, pos+1);
6389
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
31 return l1*256 + l2;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
32 end
6395
e0164b0fcafd net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
33 -- FIXME: this may lose precision
6389
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
34 local function read_uint64be(str, pos)
11106
76f46c2579a2 net.websocket.frames: Allow all methods to work on non-string objects
Matthew Wild <mwild1@gmail.com>
parents: 8728
diff changeset
35 local l1, l2, l3, l4, l5, l6, l7, l8 = str:byte(pos, pos+7);
6898
d01254d5a825 net.websocket.frames: Pack and unpack 64bit ints without overflows (lua-bitop/bit32 are 32bit)
Kim Alvefur <zash@zash.se>
parents: 6897
diff changeset
36 local h = lshift(l1, 24) + lshift(l2, 16) + lshift(l3, 8) + l4;
d01254d5a825 net.websocket.frames: Pack and unpack 64bit ints without overflows (lua-bitop/bit32 are 32bit)
Kim Alvefur <zash@zash.se>
parents: 6897
diff changeset
37 local l = lshift(l5, 24) + lshift(l6, 16) + lshift(l7, 8) + l8;
d01254d5a825 net.websocket.frames: Pack and unpack 64bit ints without overflows (lua-bitop/bit32 are 32bit)
Kim Alvefur <zash@zash.se>
parents: 6897
diff changeset
38 return h * 2^32 + l;
6389
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
39 end
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
40 local function pack_uint16be(x)
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
41 return s_char(rshift(x, 8), band(x, 0xFF));
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
42 end
6395
e0164b0fcafd net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
43 local function get_byte(x, n)
6389
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
44 return band(rshift(x, n), 0xFF);
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
45 end
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
46 local function pack_uint64be(x)
6898
d01254d5a825 net.websocket.frames: Pack and unpack 64bit ints without overflows (lua-bitop/bit32 are 32bit)
Kim Alvefur <zash@zash.se>
parents: 6897
diff changeset
47 local h = band(x / 2^32, 2^32-1);
6900
44a7e9152b9a net.websocket.frames: Fix syntax error due to code copy pasting
Kim Alvefur <zash@zash.se>
parents: 6899
diff changeset
48 return s_char(get_byte(h, 24), get_byte(h, 16), get_byte(h, 8), band(h, 0xFF),
44a7e9152b9a net.websocket.frames: Fix syntax error due to code copy pasting
Kim Alvefur <zash@zash.se>
parents: 6899
diff changeset
49 get_byte(x, 24), get_byte(x, 16), get_byte(x, 8), band(x, 0xFF));
6389
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
50 end
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
51
6899
5f3da8b00b9b net.websocket.frames: Use struct packing in Lua 5.3 or struct lib if available
Kim Alvefur <zash@zash.se>
parents: 6898
diff changeset
52 if s_pack then
5f3da8b00b9b net.websocket.frames: Use struct packing in Lua 5.3 or struct lib if available
Kim Alvefur <zash@zash.se>
parents: 6898
diff changeset
53 function pack_uint16be(x)
5f3da8b00b9b net.websocket.frames: Use struct packing in Lua 5.3 or struct lib if available
Kim Alvefur <zash@zash.se>
parents: 6898
diff changeset
54 return s_pack(">I2", x);
5f3da8b00b9b net.websocket.frames: Use struct packing in Lua 5.3 or struct lib if available
Kim Alvefur <zash@zash.se>
parents: 6898
diff changeset
55 end
5f3da8b00b9b net.websocket.frames: Use struct packing in Lua 5.3 or struct lib if available
Kim Alvefur <zash@zash.se>
parents: 6898
diff changeset
56 function pack_uint64be(x)
5f3da8b00b9b net.websocket.frames: Use struct packing in Lua 5.3 or struct lib if available
Kim Alvefur <zash@zash.se>
parents: 6898
diff changeset
57 return s_pack(">I8", x);
5f3da8b00b9b net.websocket.frames: Use struct packing in Lua 5.3 or struct lib if available
Kim Alvefur <zash@zash.se>
parents: 6898
diff changeset
58 end
5f3da8b00b9b net.websocket.frames: Use struct packing in Lua 5.3 or struct lib if available
Kim Alvefur <zash@zash.se>
parents: 6898
diff changeset
59 end
5f3da8b00b9b net.websocket.frames: Use struct packing in Lua 5.3 or struct lib if available
Kim Alvefur <zash@zash.se>
parents: 6898
diff changeset
60
5f3da8b00b9b net.websocket.frames: Use struct packing in Lua 5.3 or struct lib if available
Kim Alvefur <zash@zash.se>
parents: 6898
diff changeset
61 if s_unpack then
5f3da8b00b9b net.websocket.frames: Use struct packing in Lua 5.3 or struct lib if available
Kim Alvefur <zash@zash.se>
parents: 6898
diff changeset
62 function read_uint16be(str, pos)
11106
76f46c2579a2 net.websocket.frames: Allow all methods to work on non-string objects
Matthew Wild <mwild1@gmail.com>
parents: 8728
diff changeset
63 if type(str) ~= "string" then
76f46c2579a2 net.websocket.frames: Allow all methods to work on non-string objects
Matthew Wild <mwild1@gmail.com>
parents: 8728
diff changeset
64 str, pos = str:sub(pos, pos+1), 1;
76f46c2579a2 net.websocket.frames: Allow all methods to work on non-string objects
Matthew Wild <mwild1@gmail.com>
parents: 8728
diff changeset
65 end
6899
5f3da8b00b9b net.websocket.frames: Use struct packing in Lua 5.3 or struct lib if available
Kim Alvefur <zash@zash.se>
parents: 6898
diff changeset
66 return s_unpack(">I2", str, pos);
5f3da8b00b9b net.websocket.frames: Use struct packing in Lua 5.3 or struct lib if available
Kim Alvefur <zash@zash.se>
parents: 6898
diff changeset
67 end
5f3da8b00b9b net.websocket.frames: Use struct packing in Lua 5.3 or struct lib if available
Kim Alvefur <zash@zash.se>
parents: 6898
diff changeset
68 function read_uint64be(str, pos)
11106
76f46c2579a2 net.websocket.frames: Allow all methods to work on non-string objects
Matthew Wild <mwild1@gmail.com>
parents: 8728
diff changeset
69 if type(str) ~= "string" then
76f46c2579a2 net.websocket.frames: Allow all methods to work on non-string objects
Matthew Wild <mwild1@gmail.com>
parents: 8728
diff changeset
70 str, pos = str:sub(pos, pos+7), 1;
76f46c2579a2 net.websocket.frames: Allow all methods to work on non-string objects
Matthew Wild <mwild1@gmail.com>
parents: 8728
diff changeset
71 end
6899
5f3da8b00b9b net.websocket.frames: Use struct packing in Lua 5.3 or struct lib if available
Kim Alvefur <zash@zash.se>
parents: 6898
diff changeset
72 return s_unpack(">I8", str, pos);
5f3da8b00b9b net.websocket.frames: Use struct packing in Lua 5.3 or struct lib if available
Kim Alvefur <zash@zash.se>
parents: 6898
diff changeset
73 end
5f3da8b00b9b net.websocket.frames: Use struct packing in Lua 5.3 or struct lib if available
Kim Alvefur <zash@zash.se>
parents: 6898
diff changeset
74 end
5f3da8b00b9b net.websocket.frames: Use struct packing in Lua 5.3 or struct lib if available
Kim Alvefur <zash@zash.se>
parents: 6898
diff changeset
75
6389
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
76 local function parse_frame_header(frame)
11157
413bd21ba449 net.websocket.frames: Read buffer length correctly in Lua 5.1 (fix #1598)
Kim Alvefur <zash@zash.se>
parents: 11112
diff changeset
77 if frame:len() < 2 then return; end
6389
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
78
11106
76f46c2579a2 net.websocket.frames: Allow all methods to work on non-string objects
Matthew Wild <mwild1@gmail.com>
parents: 8728
diff changeset
79 local byte1, byte2 = frame:byte(1, 2);
6389
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
80 local result = {
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
81 FIN = band(byte1, 0x80) > 0;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
82 RSV1 = band(byte1, 0x40) > 0;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
83 RSV2 = band(byte1, 0x20) > 0;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
84 RSV3 = band(byte1, 0x10) > 0;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
85 opcode = band(byte1, 0x0F);
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
86
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
87 MASK = band(byte2, 0x80) > 0;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
88 length = band(byte2, 0x7F);
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
89 };
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
90
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
91 local length_bytes = 0;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
92 if result.length == 126 then
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
93 length_bytes = 2;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
94 elseif result.length == 127 then
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
95 length_bytes = 8;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
96 end
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
97
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
98 local header_length = 2 + length_bytes + (result.MASK and 4 or 0);
11157
413bd21ba449 net.websocket.frames: Read buffer length correctly in Lua 5.1 (fix #1598)
Kim Alvefur <zash@zash.se>
parents: 11112
diff changeset
99 if frame:len() < header_length then return; end
6389
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
100
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
101 if length_bytes == 2 then
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
102 result.length = read_uint16be(frame, 3);
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
103 elseif length_bytes == 8 then
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
104 result.length = read_uint64be(frame, 3);
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
105 end
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
106
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
107 if result.MASK then
11164
4e5a2af9dd19 net.websocket.frames: Use C string XOR implementation
Kim Alvefur <zash@zash.se>
parents: 11157
diff changeset
108 result.key = frame:sub(length_bytes+3, length_bytes+6);
6389
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
109 end
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
110
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
111 return result, header_length;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
112 end
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
113
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
114 -- XORs the string `str` with the array of bytes `key`
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
115 -- TODO: optimize
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
116 local function apply_mask(str, key, from, to)
11164
4e5a2af9dd19 net.websocket.frames: Use C string XOR implementation
Kim Alvefur <zash@zash.se>
parents: 11157
diff changeset
117 return sxor(str:sub(from or 1, to or -1), key);
6389
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
118 end
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
119
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
120 local function parse_frame_body(frame, header, pos)
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
121 if header.MASK then
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
122 return apply_mask(frame, header.key, pos, pos + header.length - 1);
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
123 else
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
124 return frame:sub(pos, pos + header.length - 1);
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
125 end
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
126 end
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
127
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
128 local function parse_frame(frame)
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
129 local result, pos = parse_frame_header(frame);
11157
413bd21ba449 net.websocket.frames: Read buffer length correctly in Lua 5.1 (fix #1598)
Kim Alvefur <zash@zash.se>
parents: 11112
diff changeset
130 if result == nil or frame:len() < (pos + result.length) then return nil, nil, result; end
6389
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
131 result.data = parse_frame_body(frame, result, pos+1);
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
132 return result, pos + result.length;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
133 end
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
134
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
135 local function build_frame(desc)
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
136 local data = desc.data or "";
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
137
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
138 assert(desc.opcode and desc.opcode >= 0 and desc.opcode <= 0xF, "Invalid WebSocket opcode");
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
139 if desc.opcode >= 0x8 then
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
140 -- RFC 6455 5.5
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
141 assert(#data <= 125, "WebSocket control frames MUST have a payload length of 125 bytes or less.");
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
142 end
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
143
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
144 local b1 = bor(desc.opcode,
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
145 desc.FIN and 0x80 or 0,
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
146 desc.RSV1 and 0x40 or 0,
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
147 desc.RSV2 and 0x20 or 0,
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
148 desc.RSV3 and 0x10 or 0);
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
149
6395
e0164b0fcafd net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
150 local b2 = #data;
e0164b0fcafd net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
151 local length_extra;
e0164b0fcafd net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
152 if b2 <= 125 then -- 7-bit length
6389
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
153 length_extra = "";
6395
e0164b0fcafd net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
154 elseif b2 <= 0xFFFF then -- 2-byte length
6389
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
155 b2 = 126;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
156 length_extra = pack_uint16be(#data);
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
157 else -- 8-byte length
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
158 b2 = 127;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
159 length_extra = pack_uint64be(#data);
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
160 end
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
161
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
162 local key = ""
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
163 if desc.MASK then
11164
4e5a2af9dd19 net.websocket.frames: Use C string XOR implementation
Kim Alvefur <zash@zash.se>
parents: 11157
diff changeset
164 key = desc.key
4e5a2af9dd19 net.websocket.frames: Use C string XOR implementation
Kim Alvefur <zash@zash.se>
parents: 11157
diff changeset
165 if not key then
6389
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
166 key = random_bytes(4);
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
167 end
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
168 b2 = bor(b2, 0x80);
11164
4e5a2af9dd19 net.websocket.frames: Use C string XOR implementation
Kim Alvefur <zash@zash.se>
parents: 11157
diff changeset
169 data = apply_mask(data, key);
6389
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
170 end
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
171
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
172 return s_char(b1, b2) .. length_extra .. key .. data
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
173 end
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
174
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
175 local function parse_close(data)
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
176 local code, message
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
177 if #data >= 2 then
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
178 code = read_uint16be(data, 1);
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
179 if #data > 2 then
11106
76f46c2579a2 net.websocket.frames: Allow all methods to work on non-string objects
Matthew Wild <mwild1@gmail.com>
parents: 8728
diff changeset
180 message = data:sub(3);
6389
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
181 end
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
182 end
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
183 return code, message
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
184 end
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
185
6455
b6514e691a70 net.websocket: Make data masking configurable
Florian Zeitz <florob@babelmonkeys.de>
parents: 6398
diff changeset
186 local function build_close(code, message, mask)
6389
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
187 local data = pack_uint16be(code);
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
188 if message then
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
189 assert(#message<=123, "Close reason must be <=123 bytes");
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
190 data = data .. message;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
191 end
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
192 return build_frame({
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
193 opcode = 0x8;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
194 FIN = true;
6455
b6514e691a70 net.websocket: Make data masking configurable
Florian Zeitz <florob@babelmonkeys.de>
parents: 6398
diff changeset
195 MASK = mask;
6389
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
196 data = data;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
197 });
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
198 end
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
199
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
200 return {
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
201 parse_header = parse_frame_header;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
202 parse_body = parse_frame_body;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
203 parse = parse_frame;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
204 build = build_frame;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
205 parse_close = parse_close;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
206 build_close = build_close;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
207 };