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Diffstat (limited to 'src/transport/transport_api_blacklist.c')
-rw-r--r-- | src/transport/transport_api_blacklist.c | 197 |
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 | */ | ||
37 | struct 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 | */ | ||
67 | static void | ||
68 | reconnect (struct GNUNET_TRANSPORT_Blacklist *br); | ||
69 | |||
70 | |||
71 | /** | ||
72 | * Handle blacklist queries. | ||
73 | * | ||
74 | * @param cls our overall handle | ||
75 | * @param bm query | ||
76 | */ | ||
77 | static void | ||
78 | handle_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 | */ | ||
104 | static void | ||
105 | mq_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 | */ | ||
119 | static void | ||
120 | reconnect (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 | */ | ||
162 | struct GNUNET_TRANSPORT_Blacklist * | ||
163 | GNUNET_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 | */ | ||
189 | void | ||
190 | GNUNET_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 */ | ||