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
|
/*
Copyright (c) 2007-2010 iMatix Corporation
This file is part of 0MQ.
0MQ is free software; you can redistribute it and/or modify it under
the terms of the Lesser GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
0MQ 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
Lesser GNU General Public License for more details.
You should have received a copy of the Lesser GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "zmq_init.hpp"
#include "zmq_engine.hpp"
#include "io_thread.hpp"
#include "session.hpp"
#include "err.hpp"
zmq::zmq_init_t::zmq_init_t (io_thread_t *parent_, socket_base_t *owner_,
fd_t fd_, const options_t &options_, bool reconnect_,
const char *protocol_, const char *address_, uint64_t session_ordinal_) :
owned_t (parent_, owner_),
sent (false),
received (false),
session_ordinal (session_ordinal_),
options (options_)
{
// Create the engine object for this connection.
engine = new (std::nothrow) zmq_engine_t (parent_, fd_, options,
reconnect_, protocol_, address_);
zmq_assert (engine);
}
zmq::zmq_init_t::~zmq_init_t ()
{
if (engine)
delete engine;
}
bool zmq::zmq_init_t::read (::zmq_msg_t *msg_)
{
// If the identity was already sent, do nothing.
if (sent)
return false;
// Send the identity.
int rc = zmq_msg_init_size (msg_, options.identity.size ());
zmq_assert (rc == 0);
memcpy (zmq_msg_data (msg_), options.identity.c_str (),
options.identity.size ());
sent = true;
// If initialisation is done, pass the engine to the session and
// destroy the init object.
finalise ();
return true;
}
bool zmq::zmq_init_t::write (::zmq_msg_t *msg_)
{
// If identity was already received, we are not interested
// in subsequent messages.
if (received)
return false;
// Retreieve the remote identity.
peer_identity.assign ((const unsigned char*) zmq_msg_data (msg_),
zmq_msg_size (msg_));
received = true;
// Once the initial handshaking is over, XREP sockets should start
// tracerouting individual messages.
if (options.traceroute)
engine->traceroute (peer_identity);
return true;
}
void zmq::zmq_init_t::flush ()
{
// Check if there's anything to flush.
if (!received)
return;
// If initialisation is done, pass the engine to the session and
// destroy the init object.
finalise ();
}
void zmq::zmq_init_t::detach (owned_t *reconnecter_)
{
// This function is called by engine when disconnection occurs.
// If required, launch the reconnecter.
if (reconnecter_) {
send_plug (reconnecter_);
send_own (owner, reconnecter_);
}
// The engine will destroy itself, so let's just drop the pointer here and
// start termination of the init object.
engine = NULL;
term ();
}
zmq::io_thread_t *zmq::zmq_init_t::get_io_thread ()
{
return choose_io_thread (options.affinity);
}
class zmq::socket_base_t *zmq::zmq_init_t::get_owner ()
{
return owner;
}
uint64_t zmq::zmq_init_t::get_ordinal ()
{
return session_ordinal;
}
void zmq::zmq_init_t::process_plug ()
{
zmq_assert (engine);
engine->plug (this);
}
void zmq::zmq_init_t::process_unplug ()
{
if (engine)
engine->unplug ();
}
void zmq::zmq_init_t::finalise ()
{
if (sent && received) {
// Disconnect the engine from the init object.
engine->unplug ();
session_t *session = NULL;
// If we have the session ordinal, let's use it to find the session.
// If it is not found, it means socket is already being shut down
// and the session have been deallocated.
// TODO: We should check whether the name of the peer haven't changed
// upon reconnection.
if (session_ordinal) {
session = owner->find_session (session_ordinal);
if (!session) {
term ();
return;
}
}
// If the peer has a unique name, find the associated session. If it
// doesn't exist, create it.
else if (!peer_identity.empty ()) {
session = owner->find_session (peer_identity);
if (!session) {
session = new (std::nothrow) session_t (
choose_io_thread (options.affinity), owner, options,
peer_identity);
zmq_assert (session);
send_plug (session);
send_own (owner, session);
// Reserve a sequence number for following 'attach' command.
session->inc_seqnum ();
}
}
// If the other party has no specific identity, let's create a
// transient session.
else {
session = new (std::nothrow) session_t (
choose_io_thread (options.affinity), owner, options, blob_t ());
zmq_assert (session);
send_plug (session);
send_own (owner, session);
// Reserve a sequence number for following 'attach' command.
session->inc_seqnum ();
}
// No need to increment seqnum as it was already incremented above.
send_attach (session, engine, peer_identity, false);
// Destroy the init object.
engine = NULL;
term ();
}
}
|
