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_util_lib.h"
22 #include "gnunet_arm_service.h"
23 #include "gnunet_hello_lib.h"
24 #include "gnunet_protocols.h"
25 #include "gnunet_transport_service.h"
26 #include "transport.h"
29 * Context for the address lookup.
31 struct GNUNET_TRANSPORT_AddressToStringContext
34 * Function to call with the human-readable address.
36 GNUNET_TRANSPORT_AddressToStringCallback cb;
44 * Connection to the service.
46 struct GNUNET_CLIENT_Connection *client;
49 * When should this operation time out?
51 struct GNUNET_TIME_Absolute timeout;
56 * Function called with responses from the service.
58 * @param cls our `struct GNUNET_TRANSPORT_AddressToStringContext *`
59 * @param msg NULL on timeout or error, otherwise presumably a
60 * message with the human-readable address
63 address_response_processor (void *cls,
64 const struct GNUNET_MessageHeader *msg)
66 struct GNUNET_TRANSPORT_AddressToStringContext *alucb = cls;
67 struct AddressToStringResultMessage *atsm;
76 alucb->cb (alucb->cb_cls,
79 GNUNET_CLIENT_disconnect (alucb->client);
83 GNUNET_break (ntohs (msg->type) ==
84 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_TO_STRING_REPLY);
86 size = ntohs (msg->size);
87 if (size < sizeof (struct AddressToStringResultMessage))
89 alucb->cb (alucb->cb_cls, NULL, GNUNET_OK);
90 GNUNET_CLIENT_disconnect (alucb->client);
94 atsm = (struct AddressToStringResultMessage *) msg;
96 result = ntohl (atsm->res);
97 addr_len = ntohl (atsm->addr_len);
99 if (size == (sizeof (struct AddressToStringResultMessage)))
101 /* done, success depends on result */
102 alucb->cb (alucb->cb_cls, NULL, result);
103 GNUNET_CLIENT_disconnect (alucb->client);
108 if (GNUNET_NO == result)
110 GNUNET_log (GNUNET_ERROR_TYPE_INFO, "Client %p failed to resolve address \n",
113 alucb->cb (alucb->cb_cls, empty_str, GNUNET_SYSERR);
115 /* expect more replies */
116 GNUNET_CLIENT_receive (alucb->client, &address_response_processor, alucb,
117 GNUNET_TIME_absolute_get_remaining (alucb->timeout));
121 address = (const char *) &atsm[1];
122 if ( (addr_len > (size - (sizeof (struct AddressToStringResultMessage)))) ||
123 (address[addr_len -1] != '\0') )
127 alucb->cb (alucb->cb_cls, NULL, GNUNET_SYSERR);
128 GNUNET_CLIENT_disconnect (alucb->client);
133 /* expect more replies */
134 GNUNET_CLIENT_receive (alucb->client, &address_response_processor, alucb,
135 GNUNET_TIME_absolute_get_remaining (alucb->timeout));
136 alucb->cb (alucb->cb_cls, address, GNUNET_OK);
141 * Convert a binary address into a human readable address.
143 * @param cfg configuration to use
144 * @param address address to convert (binary format)
145 * @param numeric should (IP) addresses be displayed in numeric form
146 * (otherwise do reverse DNS lookup)
147 * @param timeout how long is the lookup allowed to take at most
148 * @param aluc function to call with the results
149 * @param aluc_cls closure for aluc
150 * @return handle to cancel the operation, NULL on error
152 struct GNUNET_TRANSPORT_AddressToStringContext *
153 GNUNET_TRANSPORT_address_to_string (const struct GNUNET_CONFIGURATION_Handle
155 const struct GNUNET_HELLO_Address *address,
157 struct GNUNET_TIME_Relative timeout,
158 GNUNET_TRANSPORT_AddressToStringCallback
159 aluc, void *aluc_cls)
164 struct AddressLookupMessage *msg;
165 struct GNUNET_TRANSPORT_AddressToStringContext *alc;
166 struct GNUNET_CLIENT_Connection *client;
169 GNUNET_assert (address != NULL);
170 alen = address->address_length;
171 slen = strlen (address->transport_name) + 1;
172 len = sizeof (struct AddressLookupMessage) + alen + slen;
173 if (len >= GNUNET_SERVER_MAX_MESSAGE_SIZE)
178 client = GNUNET_CLIENT_connect ("transport", cfg);
181 GNUNET_log (GNUNET_ERROR_TYPE_INFO, "Client %p tries to resolve for peer `%s'address len %u \n",
182 client, GNUNET_i2s (&address->peer), address->address_length);
184 msg = GNUNET_malloc (len);
185 msg->header.size = htons (len);
186 msg->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_TO_STRING);
187 msg->numeric_only = htons ((int16_t) numeric);
188 msg->addrlen = htons ((uint16_t) alen);
189 msg->timeout = GNUNET_TIME_relative_hton (timeout);
190 addrbuf = (char *) &msg[1];
191 memcpy (addrbuf, address->address, alen);
192 memcpy (&addrbuf[alen], address->transport_name, slen);
194 alc = GNUNET_new (struct GNUNET_TRANSPORT_AddressToStringContext);
196 alc->cb_cls = aluc_cls;
197 alc->timeout = GNUNET_TIME_relative_to_absolute (timeout);
198 alc->client = client;
199 GNUNET_assert (GNUNET_OK ==
200 GNUNET_CLIENT_transmit_and_get_response (client, &msg->header,
202 &address_response_processor,
210 * Cancel request for address conversion.
212 * @param pic the context handle
215 GNUNET_TRANSPORT_address_to_string_cancel (struct
216 GNUNET_TRANSPORT_AddressToStringContext
219 GNUNET_CLIENT_disconnect (pic->client);
225 /* end of transport_api_address_to_string.c */