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
|
/*
This file is part of GNUnet.
Copyright (C) 2011-2015 GNUnet e.V.
GNUnet is free software: you can redistribute it and/or modify it
under the terms of the GNU Affero General Public License as published
by the Free Software Foundation, either version 3 of the License,
or (at your option) any later version.
GNUnet 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
Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @file ats/gnunet-service-ats_connectivity.c
* @brief ats service, interaction with 'connecivity' API
* @author Matthias Wachs
* @author Christian Grothoff
*/
#include "platform.h"
#include "gnunet-service-ats.h"
#include "gnunet-service-ats_addresses.h"
#include "gnunet-service-ats_connectivity.h"
#include "gnunet-service-ats_plugins.h"
#include "ats.h"
/**
* Active connection requests.
*/
struct ConnectionRequest
{
/**
* Client that made the request.
*/
struct GNUNET_SERVICE_Client *client;
/* TODO: allow client to express a 'strength' for this request */
};
/**
* Address suggestion requests by peer.
*/
static struct GNUNET_CONTAINER_MultiPeerMap *connection_requests;
/**
* Is the given peer in the list of peers for which we
* have an address request?
*
* @param cls unused, NULL
* @param peer peer to query for
* @return #GNUNET_YES if so, #GNUNET_NO if not
*/
unsigned int
GAS_connectivity_has_peer (void *cls,
const struct GNUNET_PeerIdentity *peer)
{
if (NULL == connection_requests)
return 0;
/* TODO: return sum of 'strength's of connectivity requests */
return GNUNET_CONTAINER_multipeermap_contains (connection_requests,
peer);
}
/**
* Handle #GNUNET_MESSAGE_TYPE_ATS_REQUEST_ADDRESS messages from clients.
*
* @param client client that sent the request
* @param message the request message
*/
void
GAS_handle_request_address (struct GNUNET_SERVICE_Client *client,
const struct RequestAddressMessage *msg)
{
struct ConnectionRequest *cr;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Received `%s' message\n",
"GNUNET_MESSAGE_TYPE_ATS_REQUEST_ADDRESS");
/* FIXME: should not ignore "msg->strength" */
cr = GNUNET_new (struct ConnectionRequest);
cr->client = client;
(void) GNUNET_CONTAINER_multipeermap_put (connection_requests,
&msg->peer,
cr,
GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
GAS_plugin_request_connect_start (&msg->peer);
}
/**
* Free the connection request from the map if the
* closure matches the client.
*
* @param cls the client to match
* @param pid peer for which the request was made
* @param value the `struct ConnectionRequest`
* @return #GNUNET_OK (continue to iterate)
*/
static int
free_matching_requests (void *cls,
const struct GNUNET_PeerIdentity *pid,
void *value)
{
struct GNUNET_SERVICE_Client *client = cls;
struct ConnectionRequest *cr = value;
if (cr->client == client)
{
GAS_plugin_request_connect_stop (pid);
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Removed request pending for peer `%s\n",
GNUNET_i2s (pid));
GNUNET_assert (GNUNET_YES ==
GNUNET_CONTAINER_multipeermap_remove (connection_requests,
pid,
cr));
GNUNET_free (cr);
}
return GNUNET_OK;
}
/**
* Handle #GNUNET_MESSAGE_TYPE_ATS_REQUEST_ADDRESS_CANCEL messages
* from clients.
*
* @param client the client that sent the request
* @param msg the request message
*/
void
GAS_handle_request_address_cancel (struct GNUNET_SERVICE_Client *client,
const struct RequestAddressMessage *msg)
{
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Received GNUNET_MESSAGE_TYPE_ATS_REQUEST_ADDRESS_CANCEL message for peer %s\n",
GNUNET_i2s (&msg->peer));
GNUNET_break (0 == ntohl (msg->strength));
GNUNET_CONTAINER_multipeermap_get_multiple (connection_requests,
&msg->peer,
&free_matching_requests,
client);
}
/**
* Unregister a client (which may have been a connectivity client,
* but this is not assured).
*
* @param client handle of the (now dead) client
*/
void
GAS_connectivity_remove_client (struct GNUNET_SERVICE_Client *client)
{
GNUNET_CONTAINER_multipeermap_iterate (connection_requests,
&free_matching_requests,
client);
}
/**
* Shutdown connectivity subsystem.
*/
void
GAS_connectivity_init ()
{
connection_requests
= GNUNET_CONTAINER_multipeermap_create (32,
GNUNET_NO);
}
/**
* Free the connection request from the map.
*
* @param cls NULL
* @param pid peer for which the request was made
* @param value the `struct ConnectionRequest`
* @return #GNUNET_OK (continue to iterate)
*/
static int
free_request (void *cls,
const struct GNUNET_PeerIdentity *pid,
void *value)
{
struct ConnectionRequest *cr = value;
free_matching_requests (cr->client,
pid,
cr);
return GNUNET_OK;
}
/**
* Shutdown connectivity subsystem.
*/
void
GAS_connectivity_done ()
{
GAS_plugin_solver_lock ();
GNUNET_CONTAINER_multipeermap_iterate (connection_requests,
&free_request,
NULL);
GAS_plugin_solver_unlock ();
GNUNET_CONTAINER_multipeermap_destroy (connection_requests);
connection_requests = NULL;
}
/* end of gnunet-service-ats_connectivity.c */
|
