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 GNUNET_TRANSPORT_AddressToStringContext
36 * Function to call with the human-readable address.
38 GNUNET_TRANSPORT_AddressToStringCallback 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 GNUNET_TRANSPORT_AddressLookupContext*'
61 * @param msg NULL on timeout or error, otherwise presumably a
62 * message with the human-readable address
65 address_response_processor (void *cls, const struct GNUNET_MessageHeader *msg)
67 struct GNUNET_TRANSPORT_AddressToStringContext *alucb = cls;
73 alucb->cb (alucb->cb_cls, NULL);
74 GNUNET_CLIENT_disconnect (alucb->client, GNUNET_NO);
78 GNUNET_break (ntohs (msg->type) ==
79 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_TO_STRING_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, &address_response_processor, alucb,
101 GNUNET_TIME_absolute_get_remaining (alucb->timeout));
102 alucb->cb (alucb->cb_cls, address);
107 * Convert a binary address into a human readable address.
109 * @param cfg configuration to use
110 * @param address address to convert (binary format)
111 * @param numeric should (IP) addresses be displayed in numeric form
112 * (otherwise do reverse DNS lookup)
113 * @param timeout how long is the lookup allowed to take at most
114 * @param aluc function to call with the results
115 * @param aluc_cls closure for aluc
116 * @return handle to cancel the operation, NULL on error
118 struct GNUNET_TRANSPORT_AddressToStringContext *
119 GNUNET_TRANSPORT_address_to_string (const struct GNUNET_CONFIGURATION_Handle *cfg,
120 const struct GNUNET_HELLO_Address *address,
122 struct GNUNET_TIME_Relative timeout,
123 GNUNET_TRANSPORT_AddressToStringCallback aluc,
128 struct AddressLookupMessage *msg;
129 struct GNUNET_TRANSPORT_AddressToStringContext *alc;
130 struct GNUNET_CLIENT_Connection *client;
133 GNUNET_assert (address != NULL);
134 len = sizeof (struct AddressLookupMessage) + GNUNET_HELLO_address_get_size (address);
135 if (len >= GNUNET_SERVER_MAX_MESSAGE_SIZE)
141 client = GNUNET_CLIENT_connect ("transport", cfg);
144 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
145 "GNUNET_TRANSPORT_address_to_string\n");
147 alen = address->address_length;
148 msg = GNUNET_malloc (len);
149 msg->header.size = htons (len);
150 msg->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_TO_STRING);
151 msg->numeric_only = htonl (numeric);
152 msg->timeout = GNUNET_TIME_relative_hton (timeout);
153 msg->addrlen = htonl (alen);
154 addrbuf = (char *) &msg[1];
155 memcpy (addrbuf, address->address, alen);
156 strcpy (&addrbuf[alen], address->transport_name);
158 alc = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_AddressToStringContext));
160 alc->cb_cls = aluc_cls;
161 alc->timeout = GNUNET_TIME_relative_to_absolute (timeout);
162 alc->client = client;
163 GNUNET_assert (GNUNET_OK ==
164 GNUNET_CLIENT_transmit_and_get_response (client, &msg->header,
166 &address_response_processor,
174 * Cancel request for address conversion.
176 * @param alc handle for the request to cancel
179 GNUNET_TRANSPORT_address_to_string_cancel (struct
180 GNUNET_TRANSPORT_AddressToStringContext
183 GNUNET_CLIENT_disconnect (alc->client, GNUNET_NO);
189 /* end of transport_api_address_to_string.c */