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Diffstat (limited to 'src/transport/transport_api_blacklist.c')
-rw-r--r--src/transport/transport_api_blacklist.c197
1 files changed, 0 insertions, 197 deletions
diff --git a/src/transport/transport_api_blacklist.c b/src/transport/transport_api_blacklist.c
deleted file mode 100644
index b195a7fc7..000000000
--- a/src/transport/transport_api_blacklist.c
+++ /dev/null
@@ -1,197 +0,0 @@
1/*
2 This file is part of GNUnet.
3 Copyright (C) 2010-2014, 2016 GNUnet e.V.
4
5 GNUnet is free software: you can redistribute it and/or modify it
6 under the terms of the GNU Affero General Public License as published
7 by the Free Software Foundation, either version 3 of the License,
8 or (at your option) any later version.
9
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Affero General Public License for more details.
14
15 You should have received a copy of the GNU Affero General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>.
17
18 SPDX-License-Identifier: AGPL3.0-or-later
19 */
20
21/**
22 * @file transport/transport_api_blacklist.c
23 * @brief library to access the blacklisting functions of the transport service
24 * @author Christian Grothoff
25 */
26#include "platform.h"
27#include "gnunet_util_lib.h"
28#include "gnunet_arm_service.h"
29#include "gnunet_hello_lib.h"
30#include "gnunet_protocols.h"
31#include "gnunet_transport_service.h"
32#include "transport.h"
33
34/**
35 * Handle for blacklisting requests.
36 */
37struct GNUNET_TRANSPORT_Blacklist
38{
39 /**
40 * Connection to transport service.
41 */
42 struct GNUNET_MQ_Handle *mq;
43
44 /**
45 * Configuration to use.
46 */
47 const struct GNUNET_CONFIGURATION_Handle *cfg;
48
49 /**
50 * Function to call for determining if a peer is allowed
51 * to communicate with us.
52 */
53 GNUNET_TRANSPORT_BlacklistCallback cb;
54
55 /**
56 * Closure for @e cb.
57 */
58 void *cb_cls;
59};
60
61
62/**
63 * Establish blacklist connection to transport service.
64 *
65 * @param br overall handle
66 */
67static void
68reconnect (struct GNUNET_TRANSPORT_Blacklist *br);
69
70
71/**
72 * Handle blacklist queries.
73 *
74 * @param cls our overall handle
75 * @param bm query
76 */
77static void
78handle_query (void *cls,
79 const struct BlacklistMessage *bm)
80{
81 struct GNUNET_TRANSPORT_Blacklist *br = cls;
82 struct GNUNET_MQ_Envelope *env;
83 struct BlacklistMessage *res;
84
85 GNUNET_break (0 == ntohl (bm->is_allowed));
86 env = GNUNET_MQ_msg (res,
87 GNUNET_MESSAGE_TYPE_TRANSPORT_BLACKLIST_REPLY);
88 res->is_allowed = htonl (br->cb (br->cb_cls,
89 &bm->peer));
90 res->peer = bm->peer;
91 GNUNET_MQ_send (br->mq,
92 env);
93}
94
95
96/**
97 * Generic error handler, called with the appropriate error code and
98 * the same closure specified at the creation of the message queue.
99 * Not every message queue implementation supports an error handler.
100 *
101 * @param cls closure with the `struct GNUNET_TRANSPORT_Blacklist *`
102 * @param error error code
103 */
104static void
105mq_error_handler (void *cls,
106 enum GNUNET_MQ_Error error)
107{
108 struct GNUNET_TRANSPORT_Blacklist *br = cls;
109
110 reconnect (br);
111}
112
113
114/**
115 * Establish blacklist connection to transport service.
116 *
117 * @param br overall handle
118 */
119static void
120reconnect (struct GNUNET_TRANSPORT_Blacklist *br)
121{
122 struct GNUNET_MQ_MessageHandler handlers[] = {
123 GNUNET_MQ_hd_fixed_size (query,
124 GNUNET_MESSAGE_TYPE_TRANSPORT_BLACKLIST_QUERY,
125 struct BlacklistMessage,
126 br),
127 GNUNET_MQ_handler_end ()
128 };
129 struct GNUNET_MQ_Envelope *env;
130 struct GNUNET_MessageHeader *req;
131
132 if (NULL != br->mq)
133 GNUNET_MQ_destroy (br->mq);
134 br->mq = GNUNET_CLIENT_connect (br->cfg,
135 "transport",
136 handlers,
137 &mq_error_handler,
138 br);
139 if (NULL == br->mq)
140 return;
141 env = GNUNET_MQ_msg (req,
142 GNUNET_MESSAGE_TYPE_TRANSPORT_BLACKLIST_INIT);
143 GNUNET_MQ_send (br->mq,
144 env);
145}
146
147
148/**
149 * Install a blacklist callback. The service will be queried for all
150 * existing connections as well as any fresh connections to check if
151 * they are permitted. If the blacklisting callback is unregistered,
152 * all hosts that were denied in the past will automatically be
153 * whitelisted again. Cancelling the blacklist handle is also the
154 * only way to re-enable connections from peers that were previously
155 * blacklisted.
156 *
157 * @param cfg configuration to use
158 * @param cb callback to invoke to check if connections are allowed
159 * @param cb_cls closure for @a cb
160 * @return NULL on error, otherwise handle for cancellation
161 */
162struct GNUNET_TRANSPORT_Blacklist *
163GNUNET_TRANSPORT_blacklist (const struct GNUNET_CONFIGURATION_Handle *cfg,
164 GNUNET_TRANSPORT_BlacklistCallback cb,
165 void *cb_cls)
166{
167 struct GNUNET_TRANSPORT_Blacklist *br;
168
169 br = GNUNET_new (struct GNUNET_TRANSPORT_Blacklist);
170 br->cfg = cfg;
171 br->cb = cb;
172 br->cb_cls = cb_cls;
173 reconnect (br);
174 if (NULL == br->mq)
175 {
176 GNUNET_free (br);
177 return NULL;
178 }
179 return br;
180}
181
182
183/**
184 * Abort the blacklist. Note that this function is the only way for
185 * removing a peer from the blacklist.
186 *
187 * @param br handle of the request that is to be cancelled
188 */
189void
190GNUNET_TRANSPORT_blacklist_cancel (struct GNUNET_TRANSPORT_Blacklist *br)
191{
192 GNUNET_MQ_destroy (br->mq);
193 GNUNET_free (br);
194}
195
196
197/* end of transport_api_blacklist.c */
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-30 19:39:47 +0000