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
/*
Copyright (c) 2007-2016 Contributors as noted in the AUTHORS file
This file is part of libzmq, the ZeroMQ core engine in C++.
libzmq is free software; you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License (LGPL) as published
by the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
As a special exception, the Contributors give you permission to link
this library with independent modules to produce an executable,
regardless of the license terms of these independent modules, and to
copy and distribute the resulting executable under terms of your choice,
provided that you also meet, for each linked independent module, the
terms and conditions of the license of that module. An independent
module is a module which is not derived from or based on this library.
If you modify this library, you must extend this exception to your
version of the library.
libzmq is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "precompiled.hpp"
#include <string.h>
#include "mechanism.hpp"
#include "options.hpp"
#include "msg.hpp"
#include "err.hpp"
#include "wire.hpp"
zmq::mechanism_t::mechanism_t (const options_t &options_) :
options (options_)
{
}
zmq::mechanism_t::~mechanism_t ()
{
}
void zmq::mechanism_t::set_peer_identity (const void *id_ptr, size_t id_size)
{
identity = blob_t (static_cast <const unsigned char*> (id_ptr), id_size);
}
void zmq::mechanism_t::peer_identity (msg_t *msg_)
{
const int rc = msg_->init_size (identity.size ());
errno_assert (rc == 0);
memcpy (msg_->data (), identity.data (), identity.size ());
msg_->set_flags (msg_t::identity);
}
void zmq::mechanism_t::set_user_id (const void *data_, size_t size_)
{
user_id = blob_t (static_cast <const unsigned char*> (data_), size_);
zap_properties.insert (
metadata_t::dict_t::value_type (
"User-Id", std::string ((char *) data_, size_)));
}
zmq::blob_t zmq::mechanism_t::get_user_id () const
{
return user_id;
}
const char *zmq::mechanism_t::socket_type_string (int socket_type) const
{
static const char *names [] = {"PAIR", "PUB", "SUB", "REQ", "REP",
"DEALER", "ROUTER", "PULL", "PUSH",
"XPUB", "XSUB", "STREAM",
"SERVER", "CLIENT",
"RADIO", "DISH",
"GATHER", "SCATTER", "DGRAM"};
zmq_assert (socket_type >= 0 && socket_type <= 18);
return names [socket_type];
}
size_t zmq::mechanism_t::add_property (unsigned char *ptr, const char *name,
const void *value, size_t value_len) const
{
const size_t name_len = strlen (name);
zmq_assert (name_len <= 255);
*ptr++ = static_cast <unsigned char> (name_len);
memcpy (ptr, name, name_len);
ptr += name_len;
zmq_assert (value_len <= 0x7FFFFFFF);
put_uint32 (ptr, static_cast <uint32_t> (value_len));
ptr += 4;
memcpy (ptr, value, value_len);
return 1 + name_len + 4 + value_len;
}
int zmq::mechanism_t::parse_metadata (const unsigned char *ptr_,
size_t length_, bool zap_flag)
{
size_t bytes_left = length_;
while (bytes_left > 1) {
const size_t name_length = static_cast <size_t> (*ptr_);
ptr_ += 1;
bytes_left -= 1;
if (bytes_left < name_length)
break;
const std::string name = std::string ((char *) ptr_, name_length);
ptr_ += name_length;
bytes_left -= name_length;
if (bytes_left < 4)
break;
const size_t value_length = static_cast <size_t> (get_uint32 (ptr_));
ptr_ += 4;
bytes_left -= 4;
if (bytes_left < value_length)
break;
const uint8_t *value = ptr_;
ptr_ += value_length;
bytes_left -= value_length;
if (name == "Identity" && options.recv_identity)
set_peer_identity (value, value_length);
else
if (name == "Socket-Type") {
const std::string socket_type ((char *) value, value_length);
if (!check_socket_type (socket_type)) {
errno = EINVAL;
return -1;
}
}
else {
const int rc = property (name, value, value_length);
if (rc == -1)
return -1;
}
if (zap_flag)
zap_properties.insert (
metadata_t::dict_t::value_type (
name, std::string ((char *) value, value_length)));
else
zmtp_properties.insert (
metadata_t::dict_t::value_type (
name, std::string ((char *) value, value_length)));
}
if (bytes_left > 0) {
errno = EPROTO;
return -1;
}
return 0;
}
int zmq::mechanism_t::property (const std::string& /* name_ */,
const void * /* value_ */, size_t /* length_ */)
{
// Default implementation does not check
// property values and returns 0 to signal success.
return 0;
}
bool zmq::mechanism_t::check_socket_type (const std::string& type_) const
{
switch (options.type) {
case ZMQ_REQ:
return type_ == "REP" || type_ == "ROUTER";
case ZMQ_REP:
return type_ == "REQ" || type_ == "DEALER";
case ZMQ_DEALER:
return type_ == "REP" || type_ == "DEALER" || type_ == "ROUTER";
case ZMQ_ROUTER:
return type_ == "REQ" || type_ == "DEALER" || type_ == "ROUTER";
case ZMQ_PUSH:
return type_ == "PULL";
case ZMQ_PULL:
return type_ == "PUSH";
case ZMQ_PUB:
return type_ == "SUB" || type_ == "XSUB";
case ZMQ_SUB:
return type_ == "PUB" || type_ == "XPUB";
case ZMQ_XPUB:
return type_ == "SUB" || type_ == "XSUB";
case ZMQ_XSUB:
return type_ == "PUB" || type_ == "XPUB";
case ZMQ_PAIR:
return type_ == "PAIR";
case ZMQ_SERVER:
return type_ == "CLIENT";
case ZMQ_CLIENT:
return type_ == "SERVER";
case ZMQ_RADIO:
return type_ == "DISH";
case ZMQ_DISH:
return type_ == "RADIO";
case ZMQ_GATHER:
return type_ == "SCATTER";
case ZMQ_SCATTER:
return type_ == "GATHER";
case ZMQ_DGRAM:
return type_ == "DGRAM";
default:
break;
}
return false;
}