2 This file is part of GNUnet.
3 (C) 2009, 2010 Christian Grothoff (and other contributing authors)
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.
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.
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.
21 #include "gnunet_client_lib.h"
22 #include "gnunet_arm_service.h"
23 #include "gnunet_hello_lib.h"
24 #include "gnunet_protocols.h"
25 #include "gnunet_server_lib.h"
26 #include "gnunet_time_lib.h"
27 #include "gnunet_transport_service.h"
28 #include "transport.h"
31 * Context for the address lookup.
33 struct AddressLookupCtx
36 * Function to call with the human-readable address.
38 GNUNET_TRANSPORT_AddressLookUpCallback cb;
46 * Connection to the service.
48 struct GNUNET_CLIENT_Connection *client;
51 * When should this operation time out?
53 struct GNUNET_TIME_Absolute timeout;
58 * Function called with responses from the service.
60 * @param cls our 'struct AddressLookupCtx*'
61 * @param msg NULL on timeout or error, otherwise presumably a
62 * message with the human-readable address
65 peer_address_response_processor (void *cls,
66 const struct GNUNET_MessageHeader *msg)
68 struct AddressLookupCtx *alucb = cls;
74 alucb->cb (alucb->cb_cls, NULL);
75 GNUNET_CLIENT_disconnect (alucb->client, GNUNET_NO);
79 GNUNET_break (ntohs (msg->type) == GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
80 size = ntohs (msg->size);
81 if (size == sizeof (struct GNUNET_MessageHeader))
84 alucb->cb (alucb->cb_cls, NULL);
85 GNUNET_CLIENT_disconnect (alucb->client, GNUNET_NO);
89 address = (const char *) &msg[1];
90 if (address[size - sizeof (struct GNUNET_MessageHeader) - 1] != '\0')
94 alucb->cb (alucb->cb_cls, NULL);
95 GNUNET_CLIENT_disconnect (alucb->client, GNUNET_NO);
99 /* expect more replies */
100 GNUNET_CLIENT_receive (alucb->client,
101 &peer_address_response_processor, alucb,
102 GNUNET_TIME_absolute_get_remaining
104 alucb->cb (alucb->cb_cls, address);
109 * Return all the known addresses for a peer.
111 * @param cfg configuration to use
112 * @param peer peer identity to look up the addresses of
113 * @param timeout how long is the lookup allowed to take at most
114 * @param peer_address_callback function to call with the results
115 * @param peer_address_callback_cls closure for peer_address_callback
118 GNUNET_TRANSPORT_peer_address_lookup (const struct GNUNET_CONFIGURATION_Handle *cfg,
119 const struct GNUNET_PeerIdentity *peer,
120 struct GNUNET_TIME_Relative timeout,
121 GNUNET_TRANSPORT_AddressLookUpCallback peer_address_callback,
122 void *peer_address_callback_cls)
124 struct PeerAddressLookupMessage msg;
125 struct GNUNET_TIME_Absolute abs_timeout;
126 struct AddressLookupCtx *peer_address_lookup_cb;
127 struct GNUNET_CLIENT_Connection *client;
129 client = GNUNET_CLIENT_connect ("transport", cfg);
132 peer_address_callback (peer_address_callback_cls, NULL);
135 abs_timeout = GNUNET_TIME_relative_to_absolute (timeout);
137 msg.header.size = htons (sizeof(struct PeerAddressLookupMessage));
138 msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_PEER_ADDRESS_LOOKUP);
139 msg.timeout = GNUNET_TIME_absolute_hton (abs_timeout);
140 memcpy(&msg.peer, peer, sizeof(struct GNUNET_PeerIdentity));
141 peer_address_lookup_cb = GNUNET_malloc (sizeof (struct AddressLookupCtx));
142 peer_address_lookup_cb->cb = peer_address_callback;
143 peer_address_lookup_cb->cb_cls = peer_address_callback_cls;
144 peer_address_lookup_cb->timeout = abs_timeout;
145 peer_address_lookup_cb->client = client;
146 GNUNET_assert (GNUNET_OK ==
147 GNUNET_CLIENT_transmit_and_get_response (client,
151 &peer_address_response_processor,
152 peer_address_lookup_cb));
155 /* end of transport_api_peer_address_lookup.c */