aboutsummaryrefslogtreecommitdiff
path: root/src/core/core_api_is_connected.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/core/core_api_is_connected.c')
-rw-r--r--src/core/core_api_is_connected.c224
1 files changed, 0 insertions, 224 deletions
diff --git a/src/core/core_api_is_connected.c b/src/core/core_api_is_connected.c
deleted file mode 100644
index 31edb94b4..000000000
--- a/src/core/core_api_is_connected.c
+++ /dev/null
@@ -1,224 +0,0 @@
1/*
2 This file is part of GNUnet.
3 (C) 2009, 2010, 2012 Christian Grothoff (and other contributing authors)
4
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
8 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 General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
19*/
20
21/**
22 * @file core/core_api_is_connected.c
23 * @brief implementation of the 'GNUNET_CORE_is_peer_connected function
24 * @author Christian Grothoff
25 * @author Nathan Evans
26 *
27 * TODO:
28 * - define nice structs for the IPC messages in core.h
29 * - consider NOT always sending the 'END' message -- it is redundant!
30 */
31#include "platform.h"
32#include "gnunet_core_service.h"
33#include "core.h"
34
35
36/**
37 * Closure for 'transmit_is_connected_request"
38 */
39struct GNUNET_CORE_ConnectTestHandle
40{
41
42 /**
43 * Our connection to the service.
44 */
45 struct GNUNET_CLIENT_Connection *client;
46
47 /**
48 * Handle for transmitting a request.
49 */
50 struct GNUNET_CLIENT_TransmitHandle *th;
51
52 /**
53 * Function called with the peer.
54 */
55 GNUNET_CORE_ConnectEventHandler peer_cb;
56
57 /**
58 * Peer to check for.
59 */
60 struct GNUNET_PeerIdentity peer;
61
62 /**
63 * Closure for peer_cb.
64 */
65 void *cb_cls;
66
67};
68
69
70/**
71 * Receive reply from core service with information about a peer.
72 *
73 * @param cls our 'struct GNUNET_CORE_RequestContext *'
74 * @param msg NULL on error or last entry
75 */
76static void
77receive_connect_info (void *cls, const struct GNUNET_MessageHeader *msg)
78{
79 struct GNUNET_CORE_ConnectTestHandle *cth = cls;
80 const struct ConnectNotifyMessage *connect_message;
81 uint16_t msize;
82
83 if (NULL == msg)
84 {
85 /* core died, failure */
86 cth->peer_cb (cth->cb_cls, NULL);
87 GNUNET_CORE_is_peer_connected_cancel (cth);
88 return;
89 }
90 if ((ntohs (msg->type) == GNUNET_MESSAGE_TYPE_CORE_ITERATE_PEERS_END) &&
91 (ntohs (msg->size) == sizeof (struct GNUNET_MessageHeader)))
92 {
93 /* end of transmissions */
94 cth->peer_cb (cth->cb_cls, NULL);
95 GNUNET_CORE_is_peer_connected_cancel (cth);
96 return;
97 }
98 msize = ntohs (msg->size);
99 /* Handle incorrect message type or size, disconnect and clean up */
100 if ((ntohs (msg->type) != GNUNET_MESSAGE_TYPE_CORE_NOTIFY_CONNECT) ||
101 (msize < sizeof (struct ConnectNotifyMessage)))
102 {
103 GNUNET_break (0);
104 cth->peer_cb (cth->cb_cls, NULL);
105 GNUNET_CORE_is_peer_connected_cancel (cth);
106 return;
107 }
108 connect_message = (const struct ConnectNotifyMessage *) msg;
109 if (msize != sizeof (struct ConnectNotifyMessage))
110 {
111 GNUNET_break (0);
112 cth->peer_cb (cth->cb_cls, NULL);
113 GNUNET_CORE_is_peer_connected_cancel (cth);
114 return;
115 }
116 /* Normal case */
117 cth->peer_cb (cth->cb_cls, &connect_message->peer);
118 GNUNET_CLIENT_receive (cth->client, &receive_connect_info,
119 cth, GNUNET_TIME_UNIT_FOREVER_REL);
120}
121
122
123/**
124 * Function called to notify a client about the socket
125 * begin ready to queue more data. "buf" will be
126 * NULL and "size" zero if the socket was closed for
127 * writing in the meantime.
128 *
129 * @param cls closure
130 * @param size number of bytes available in buf
131 * @param buf where the callee should write the message
132 * @return number of bytes written to buf
133 */
134static size_t
135transmit_is_connected_request (void *cls, size_t size, void *buf)
136{
137 struct GNUNET_CORE_ConnectTestHandle *cth = cls;
138 struct GNUNET_MessageHeader *msg;
139 unsigned int msize;
140
141 cth->th = NULL;
142 msize =
143 sizeof (struct GNUNET_MessageHeader) +
144 sizeof (struct GNUNET_PeerIdentity);
145 if ( (NULL == buf) || (0 == size) )
146 {
147 cth->peer_cb (cth->cb_cls, NULL);
148 GNUNET_CLIENT_disconnect (cth->client);
149 GNUNET_free (cth);
150 return 0;
151 }
152 GNUNET_assert (size >= msize);
153 msg = (struct GNUNET_MessageHeader *) buf;
154 msg->size = htons (msize);
155 msg->type = htons (GNUNET_MESSAGE_TYPE_CORE_PEER_CONNECTED);
156 memcpy (&msg[1], &cth->peer, sizeof (struct GNUNET_PeerIdentity));
157 GNUNET_CLIENT_receive (cth->client, &receive_connect_info, cth,
158 GNUNET_TIME_UNIT_FOREVER_REL);
159 return msize;
160}
161
162
163/**
164 * Iterate over all currently connected peers.
165 * Calls peer_cb with each connected peer, and then
166 * once with NULL to indicate that all peers have
167 * been handled.
168 *
169 * @param cfg configuration to use
170 * @param peer the specific peer to check for
171 * @param peer_cb function to call with the peer information
172 * @param cb_cls closure for peer_cb
173 *
174 * @return GNUNET_OK if iterating, GNUNET_SYSERR on error
175 */
176struct GNUNET_CORE_ConnectTestHandle *
177GNUNET_CORE_is_peer_connected (const struct GNUNET_CONFIGURATION_Handle *cfg,
178 const struct GNUNET_PeerIdentity *peer,
179 GNUNET_CORE_ConnectEventHandler peer_cb,
180 void *cb_cls)
181{
182 struct GNUNET_CORE_ConnectTestHandle *cth;
183 struct GNUNET_CLIENT_Connection *client;
184
185 GNUNET_assert (NULL != peer);
186 GNUNET_assert (NULL != peer_cb);
187 client = GNUNET_CLIENT_connect ("core", cfg);
188 if (NULL == client)
189 return NULL;
190 cth = GNUNET_malloc (sizeof (struct GNUNET_CORE_ConnectTestHandle));
191 cth->peer = *peer;
192 cth->client = client;
193 cth->peer_cb = peer_cb;
194 cth->cb_cls = cb_cls;
195 cth->th =
196 GNUNET_CLIENT_notify_transmit_ready (client,
197 sizeof (struct GNUNET_MessageHeader) +
198 sizeof (struct GNUNET_PeerIdentity),
199 GNUNET_TIME_UNIT_FOREVER_REL,
200 GNUNET_YES, &transmit_is_connected_request, cth);
201 GNUNET_assert (NULL != cth->th);
202 return cth;
203}
204
205
206/**
207 * Abort 'is_connected' test operation.
208 *
209 * @param cth handle for operation to cancel
210 */
211void
212GNUNET_CORE_is_peer_connected_cancel (struct GNUNET_CORE_ConnectTestHandle *cth)
213{
214 if (NULL != cth->th)
215 {
216 GNUNET_CLIENT_notify_transmit_ready_cancel (cth->th);
217 cth->th = NULL;
218 }
219 GNUNET_CLIENT_disconnect (cth->client);
220 GNUNET_free (cth);
221}
222
223
224/* end of core_api_is_connected.c */
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-13 20:54:11 +0000