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
|
/*
Copyright (C) 2000 Stefan Westerfeld
stefan@space.twc.de
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
#include "connection.h"
#include "dispatcher.h"
#include "debug.h"
#include <stdio.h>
#include <string.h> // for Solaris
#include <queue>
#include <algorithm>
using namespace Arts;
using namespace std;
namespace Arts {
class ConnectionPrivate {
public:
struct Data {
Data() : data(0), len(0) { }
Data(unsigned char *data, long len) : data(data), len(len) { }
Data(const Data& d) : data(d.data), len(d.len) { }
unsigned char *data;
long len;
};
queue<Data> incoming;
map<string,string> hints;
};
}
Connection::Connection() :d(new ConnectionPrivate), _refCnt(1)
{
_connState = unknown;
}
Connection::~Connection()
{
assert(d->incoming.empty());
assert(_refCnt == 0);
delete d;
}
void Connection::_copy()
{
assert(_refCnt > 0);
_refCnt++;
}
void Connection::_release()
{
assert(_refCnt > 0);
_refCnt--;
if(_refCnt == 0)
delete this;
}
void Connection::initReceive()
{
rcbuf = 0;
receiveHeader = true;
remaining = 12;
}
void Connection::receive(unsigned char *newdata, long newlen)
{
/*
* protect against being freed while receive is running, as there are a
* few points where reentrant event loops may happen (Dispatcher::handle)
*/
_copy();
d->incoming.push(ConnectionPrivate::Data(newdata,newlen));
do
{
ConnectionPrivate::Data &data = d->incoming.front();
// get a buffer for the incoming message
if(!rcbuf) rcbuf = new Buffer;
// put a suitable amount of input data into the receive buffer
long len = min(remaining, data.len);
remaining -= len;
rcbuf->write(data.data,len);
data.len -= len;
data.data += len;
if(data.len == 0)
d->incoming.pop();
// look if it was enough to do something useful with it
if(remaining == 0)
{
if(receiveHeader)
{
long mcopMagic;
mcopMagic = rcbuf->readLong();
remaining = rcbuf->readLong() - 12;
messageType = rcbuf->readLong();
if(_connState != Connection::established
&& (remaining >= 4096 || remaining < 0))
{
/*
* don't accept large amounts of data on unauthenticated
* connections
*/
remaining = 0;
}
if(mcopMagic == MCOP_MAGIC)
{
// do we need to receive more data (message body?)
if(remaining)
{
receiveHeader = false;
}
else
{
Buffer *received = rcbuf;
initReceive();
Dispatcher::the()->handle(this,received,messageType);
}
}
else
{
initReceive();
Dispatcher::the()->handleCorrupt(this);
}
}
else
{
Buffer *received = rcbuf;
/*
* it's important to prepare to receive new messages *before*
* calling Dispatcher::the()->handle(...), as handle may
* get into an I/O situation (e.g. when doing an invocation
* itself), and we may receive more messages while handle is
* running
*/
initReceive();
// rcbuf is consumed by the dispatcher
Dispatcher::the()->handle(this,received,messageType);
}
}
} while(!d->incoming.empty());
_release();
}
void Connection::setHints(const vector<string>& hints)
{
vector<string>::const_iterator i;
for(i = hints.begin(); i != hints.end(); i++)
{
string key;
vector<string> values;
if(MCOPUtils::tokenize(*i, key, values))
{
if(values.size() == 1)
d->hints[key] = values[0];
}
}
}
string Connection::findHint(const string& hint)
{
return d->hints[hint];
}
|
