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
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
|
// $Id$
#include "SOCK_Dgram_Mcast_QoS.h"
#include "ace/Log_Msg.h"
#include "ace/OS_NS_sys_socket.h"
#if defined (ACE_WIN32)
#include "ace/Sock_Connect.h" // needed for subscribe_ifs()
#endif /* ACE_WIN32 */
#if !defined (__ACE_INLINE__)
#include "SOCK_Dgram_Mcast_QoS.i"
#endif /* __ACE_INLINE__ */
// This is a workaround for platforms with non-standard
// definitions of the ip_mreq structure
#if ! defined (IMR_MULTIADDR)
#define IMR_MULTIADDR imr_multiaddr
#endif /* ! defined (IMR_MULTIADDR) */
ACE_RCSID (QoS,
SOCK_Dgram_Mcast_QoS,
"$Id$")
ACE_BEGIN_VERSIONED_NAMESPACE_DECL
ACE_ALLOC_HOOK_DEFINE(ACE_SOCK_Dgram_Mcast_QoS)
// Dummy default constructor...
ACE_SOCK_Dgram_Mcast_QoS::ACE_SOCK_Dgram_Mcast_QoS (options opts)
: ACE_SOCK_Dgram_Mcast (opts)
{
ACE_TRACE ("ACE_SOCK_Dgram_Mcast_QoS::ACE_SOCK_Dgram_Mcast_QoS");
}
int
ACE_SOCK_Dgram_Mcast_QoS::open (const ACE_INET_Addr &addr,
const ACE_QoS_Params &qos_params,
int protocol_family,
int protocol,
ACE_Protocol_Info *protocolinfo,
ACE_SOCK_GROUP g,
u_long flags,
int reuse_addr)
{
ACE_TRACE ("ACE_SOCK_Dgram_Mcast_QoS::open");
ACE_UNUSED_ARG (qos_params);
// Only perform the <open> initialization if we haven't been opened
// earlier.
if (this->get_handle () != ACE_INVALID_HANDLE)
return 0;
ACE_DEBUG ((LM_DEBUG,
"Get Handle Returns Invalid Handle\n"));
if (ACE_SOCK::open (SOCK_DGRAM,
protocol_family,
protocol,
protocolinfo,
g,
flags,
reuse_addr) == -1)
return -1;
return this->open_i (addr, 0, reuse_addr);
}
int
ACE_SOCK_Dgram_Mcast_QoS::subscribe_ifs (const ACE_INET_Addr &mcast_addr,
const ACE_QoS_Params &qos_params,
const ACE_TCHAR *net_if,
int protocol_family,
int protocol,
int reuse_addr,
ACE_Protocol_Info *protocolinfo)
{
ACE_TRACE ("ACE_SOCK_Dgram_Mcast_QoS::subscribe_ifs");
#if defined (ACE_WIN32)
// Windows NT's winsock has trouble with multicast subscribes in the
// presence of multiple network interfaces when the IP address is
// given as INADDR_ANY. It will pick the first interface and only
// accept mcast there. So, to work around this, cycle through all
// of the interfaces known and subscribe to all the non-loopback
// ones.
//
// Note that this only needs to be done on NT, but there's no way to
// tell at this point if the code will be running on NT - only if it
// is compiled for NT-only or for NT/95, and that doesn't really
// help us. It doesn't hurt to do this on Win95, it's just a little
// slower than it normally would be.
//
// NOTE - <ACE_Sock_Connect::get_ip_interfaces> doesn't always get all
// of the interfaces. In particular, it may not get a PPP interface. This
// is a limitation of the way <ACE_Sock_Connect::get_ip_interfaces> works
// with MSVC. The reliable way of getting the interface list is
// available only with MSVC 5.
if (net_if == 0)
{
ACE_INET_Addr *if_addrs = 0;
size_t if_cnt;
if (ACE::get_ip_interfaces (if_cnt, if_addrs) != 0)
return -1;
size_t nr_subscribed = 0;
if (if_cnt < 2)
{
if (this->subscribe (mcast_addr,
qos_params,
reuse_addr,
ACE_LIB_TEXT ("0.0.0.0"),
protocol_family,
protocol,
protocolinfo) == 0)
++nr_subscribed;
}
else
// Iterate through all the interfaces, figure out which ones
// offer multicast service, and subscribe to them.
while (if_cnt > 0)
{
--if_cnt;
// Convert to 0-based for indexing, next loop check.
if (if_addrs[if_cnt].get_ip_address() == INADDR_LOOPBACK)
continue;
if (this->subscribe (mcast_addr,
qos_params,
reuse_addr,
ACE_TEXT_CHAR_TO_TCHAR
(if_addrs[if_cnt].get_host_addr()),
protocol_family,
protocol,
protocolinfo) == 0)
++nr_subscribed;
}
delete [] if_addrs;
if (nr_subscribed == 0)
{
errno = ENODEV;
return -1;
}
else
// 1 indicates a "short-circuit" return. This handles the
// rather bizarre semantics of checking all the interfaces on
// NT.
return 1;
}
#else
ACE_UNUSED_ARG (mcast_addr);
ACE_UNUSED_ARG (qos_params);
ACE_UNUSED_ARG (protocol_family);
ACE_UNUSED_ARG (protocol);
ACE_UNUSED_ARG (reuse_addr);
ACE_UNUSED_ARG (protocolinfo);
#endif /* ACE_WIN32 */
// Otherwise, do it like everyone else...
// Create multicast request.
if (this->make_multicast_ifaddr (0,
mcast_addr,
net_if) == -1)
return -1;
else
return 0;
}
int
ACE_SOCK_Dgram_Mcast_QoS::subscribe (const ACE_INET_Addr &mcast_addr,
const ACE_QoS_Params &qos_params,
int reuse_addr,
const ACE_TCHAR *net_if,
int protocol_family,
int protocol,
ACE_Protocol_Info *protocolinfo,
ACE_SOCK_GROUP g,
u_long flags,
ACE_QoS_Session *qos_session)
{
ACE_TRACE ("ACE_SOCK_Dgram_Mcast_QoS::subscribe");
if (this->open (mcast_addr,
qos_params,
protocol_family,
protocol,
protocolinfo,
g,
flags,
reuse_addr) == -1)
return -1;
// The following method call only applies to Win32 currently.
int result = this->subscribe_ifs (mcast_addr,
qos_params,
net_if,
protocol_family,
protocol,
reuse_addr,
protocolinfo);
// Check for the "short-circuit" return value of 1 (for NT).
if (result != 0)
return result;
// Tell network device driver to read datagrams with a
// <mcast_request_if_> IP interface.
else
{
// Check if the mcast_addr passed into this method is the
// same as the QoS session address.
if (qos_session != 0 && mcast_addr == qos_session->dest_addr ())
{
// Subscribe to the QoS session.
if (this->qos_manager_.join_qos_session (qos_session) == -1)
ACE_ERROR_RETURN ((LM_ERROR,
ACE_LIB_TEXT ("Unable to join QoS Session\n")),
-1);
}
else
{
if (this->close () != 0)
ACE_ERROR ((LM_ERROR,
ACE_LIB_TEXT ("Unable to close socket\n")));
ACE_ERROR_RETURN ((LM_ERROR,
ACE_LIB_TEXT ("Dest Addr in the QoS Session does")
ACE_LIB_TEXT (" not match the address passed into")
ACE_LIB_TEXT (" subscribe\n")),
-1);
}
ip_mreq ret_mreq;
this->make_multicast_ifaddr (&ret_mreq, mcast_addr, net_if);
// XX This is windows stuff only. fredk
if (ACE_OS::join_leaf (this->get_handle (),
reinterpret_cast<const sockaddr *> (&ret_mreq.IMR_MULTIADDR.s_addr),
sizeof ret_mreq.IMR_MULTIADDR.s_addr,
qos_params) == ACE_INVALID_HANDLE
&& errno != ENOTSUP)
return -1;
else
if (qos_params.socket_qos () != 0 && qos_session != 0)
qos_session->qos (*(qos_params.socket_qos ()));
return 0;
}
}
ACE_END_VERSIONED_NAMESPACE_DECL
|
