2 This file is part of GNUnet.
3 Copyright (C) 2011, 2017 GNUnet e.V.
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.
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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.
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/>.
18 SPDX-License-Identifier: AGPL3.0-or-later
21 * @file cadet/cadet_api.c
22 * @brief cadet api: client implementation of cadet service
23 * @author Bartlomiej Polot
24 * @author Christian Grothoff
27 #include "gnunet_util_lib.h"
28 #include "gnunet_constants.h"
29 #include "gnunet_cadet_service.h"
31 #include "cadet_protocol.h"
38 struct GNUNET_CADET_ListTunnels
44 GNUNET_CADET_TunnelsCB tunnels_cb;
47 * Info callback closure for @c tunnels_cb.
54 * Send message of @a type to CADET service of @a h
56 * @param h handle to CADET service
57 * @param type message type of trivial information request to send
60 send_info_request (struct GNUNET_CADET_Handle *h,
63 struct GNUNET_MessageHeader *msg;
64 struct GNUNET_MQ_Envelope *env;
66 env = GNUNET_MQ_msg (msg,
68 GNUNET_MQ_send (h->mq,
74 * Check that message received from CADET service is well-formed.
76 * @param cls the `struct GNUNET_CADET_Handle`
77 * @param message the message we got
78 * @return #GNUNET_OK if the message is well-formed,
79 * #GNUNET_SYSERR otherwise
82 check_get_tunnels (void *cls,
83 const struct GNUNET_MessageHeader *message)
88 esize = ntohs (message->size);
89 if (sizeof (struct GNUNET_CADET_LocalInfoTunnel) == esize)
91 if (sizeof (struct GNUNET_MessageHeader) == esize)
98 * Process a local reply about info on all tunnels, pass info to the user.
100 * @param cls Closure (Cadet handle).
101 * @param message Message itself.
104 handle_get_tunnels (void *cls,
105 const struct GNUNET_MessageHeader *msg)
107 struct GNUNET_CADET_Handle *h = cls;
108 const struct GNUNET_CADET_LocalInfoTunnel *info =
109 (const struct GNUNET_CADET_LocalInfoTunnel *) msg;
111 if (NULL == h->info_cb.tunnels_cb)
113 if (sizeof (struct GNUNET_CADET_LocalInfoTunnel) == ntohs (msg->size))
114 h->info_cb.tunnels_cb (h->info_cls,
116 ntohl (info->channels),
117 ntohl (info->connections),
118 ntohs (info->estate),
119 ntohs (info->cstate));
121 h->info_cb.tunnels_cb (h->info_cls,
131 * Request information about tunnels of the running cadet peer.
132 * The callback will be called for every tunnel of the service.
133 * Only one info request (of any kind) can be active at once.
135 * WARNING: unstable API, likely to change in the future!
137 * @param h Handle to the cadet peer.
138 * @param callback Function to call with the requested data.
139 * @param callback_cls Closure for @c callback.
140 * @return #GNUNET_OK / #GNUNET_SYSERR
143 GNUNET_CADET_list_tunnels (const struct GNUNET_CONFIGURATION_Handle *cfg,
144 GNUNET_CADET_TunnelsCB callback,
148 GNUNET_MQ_hd_var_size (get_tunnels,
149 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNELS,
150 struct GNUNET_MessageHeader,
152 GNUNET_MQ_hd_var_size (get_tunnel,
153 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNEL,
154 struct GNUNET_CADET_LocalInfoTunnel,
156 GNUNET_MQ_handler_end ()
158 if (NULL != h->info_cb.tunnels_cb)
161 return GNUNET_SYSERR;
163 send_info_request (h,
164 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNELS);
165 h->info_cb.tunnels_cb = callback;
166 h->info_cls = callback_cls;
172 * Cancel a monitor request. The monitor callback will not be called.
174 * @param h Cadet handle.
175 * @return Closure given to GNUNET_CADET_list_tunnels().
178 GNUNET_CADET_list_tunnels_cancel (struct GNUNET_CADET_ListTunnels *lt)
180 void *cls = h->info_cls;
182 h->info_cb.tunnels_cb = NULL;