+/*
+ This file is part of GNUnet.
+ (C) 2009, 2010 Christian Grothoff (and other contributing authors)
+
+ GNUnet is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published
+ by the Free Software Foundation; either version 3, or (at your
+ option) any later version.
+
+ GNUnet is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with GNUnet; see the file COPYING. If not, write to the
+ Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA.
+*/
#include "platform.h"
#include "gnunet_client_lib.h"
#include "gnunet_arm_service.h"
#include "gnunet_transport_service.h"
#include "transport.h"
-// FIXME: document
-struct AddressLookUpCB {
- GNUNET_TRANSPORT_AddressLookUpCallback cb;
- void *cls;
- struct GNUNET_TIME_Absolute timeout;
- struct GNUNET_CLIENT_Connection *client;
+/**
+ * Context for the address lookup.
+ */
+struct AddressLookupCtx
+{
+ /**
+ * Function to call with the human-readable address.
+ */
+ GNUNET_TRANSPORT_AddressLookUpCallback cb;
+
+ /**
+ * Closure for cb.
+ */
+ void *cb_cls;
+
+ /**
+ * Connection to the service.
+ */
+ struct GNUNET_CLIENT_Connection *client;
+
+ /**
+ * When should this operation time out?
+ */
+ struct GNUNET_TIME_Absolute timeout;
};
-// FIXME: document
+/**
+ * Function called with responses from the service.
+ *
+ * @param cls our 'struct AddressLookupCtx*'
+ * @param msg NULL on timeout or error, otherwise presumably a
+ * message with the human-readable address
+ */
static void
-address_response_processor(void *cls, const struct
- GNUNET_MessageHeader * msg)
+address_response_processor (void *cls,
+ const struct GNUNET_MessageHeader *msg)
{
- struct AddressLookUpCB *alucb = cls;
- const char *address;
- uint16_t size;
+ struct AddressLookupCtx *alucb = cls;
+ const char *address;
+ uint16_t size;
- if (msg == NULL)
- {
- /* timeout */
- alucb->cb (alucb->cls, NULL);
- GNUNET_CLIENT_disconnect (alucb->client);
- GNUNET_free (alucb);
- return;
- }
- size = ntohs(msg->size);
- if (size == sizeof(struct GNUNET_MessageHeader))
- {
- /* last reply */
- address = NULL;
- }
- else
- {
- address = (const char*) &msg[1];
- if (address[size - sizeof(struct GNUNET_MessageHeader) - 1] != '\0')
- {
- /* invalid reply */
- GNUNET_break_op (0);
- alucb->cb (alucb->cls, NULL);
- GNUNET_CLIENT_disconnect (alucb->client);
- GNUNET_free (alucb);
- return;
- }
- else
- {
- /* expect more replies */
- GNUNET_CLIENT_receive (alucb->client, &address_response_processor, alucb,
- GNUNET_TIME_absolute_get_remaining (alucb->timeout));
- }
- }
- alucb->cb (alucb->cls, address);
- if (address == NULL)
- {
- /* done! */
- GNUNET_CLIENT_disconnect (alucb->client);
- GNUNET_free (alucb);
- }
+ if (msg == NULL)
+ {
+ alucb->cb (alucb->cb_cls, NULL);
+ GNUNET_CLIENT_disconnect (alucb->client, GNUNET_NO);
+ GNUNET_free (alucb);
+ return;
+ }
+ GNUNET_break (ntohs (msg->type) == GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
+ size = ntohs (msg->size);
+ if (size == sizeof (struct GNUNET_MessageHeader))
+ {
+ /* done! */
+ alucb->cb (alucb->cb_cls, NULL);
+ GNUNET_CLIENT_disconnect (alucb->client, GNUNET_NO);
+ GNUNET_free (alucb);
+ return;
+ }
+ address = (const char *) &msg[1];
+ if (address[size - sizeof (struct GNUNET_MessageHeader) - 1] != '\0')
+ {
+ /* invalid reply */
+ GNUNET_break (0);
+ alucb->cb (alucb->cb_cls, NULL);
+ GNUNET_CLIENT_disconnect (alucb->client, GNUNET_NO);
+ GNUNET_free (alucb);
+ return;
+ }
+ /* expect more replies */
+ GNUNET_CLIENT_receive (alucb->client,
+ &address_response_processor, alucb,
+ GNUNET_TIME_absolute_get_remaining
+ (alucb->timeout));
+ alucb->cb (alucb->cb_cls, address);
}
+
+/**
+ * Convert a binary address into a human readable address.
+ *
+ * @param sched scheduler to use
+ * @param cfg configuration to use
+ * @param address address to convert (binary format)
+ * @param addressLen number of bytes in address
+ * @param numeric should (IP) addresses be displayed in numeric form
+ * (otherwise do reverse DNS lookup)
+ * @param nameTrans name of the transport to which the address belongs
+ * @param timeout how long is the lookup allowed to take at most
+ * @param aluc function to call with the results
+ * @param aluc_cls closure for aluc
+ */
void
GNUNET_TRANSPORT_address_lookup (struct GNUNET_SCHEDULER_Handle *sched,
- const struct GNUNET_CONFIGURATION_Handle *cfg,
- const char * address,
- size_t addressLen,
- const char * nameTrans,
- struct GNUNET_TIME_Relative timeout,
- GNUNET_TRANSPORT_AddressLookUpCallback aluc,
- void *aluc_cls)
+ const struct GNUNET_CONFIGURATION_Handle *cfg,
+ const char *address,
+ size_t addressLen,
+ int numeric,
+ const char *nameTrans,
+ struct GNUNET_TIME_Relative timeout,
+ GNUNET_TRANSPORT_AddressLookUpCallback aluc,
+ void *aluc_cls)
{
- size_t len = sizeof (struct AddressLookupMessage) + addressLen + strlen (nameTrans) + 1;
- struct AddressLookupMessage *msg;
- struct GNUNET_TIME_Absolute abs_timeout;
- struct AddressLookUpCB *aluCB;
- struct GNUNET_CLIENT_Connection *client;
+ size_t slen;
+ size_t len;
+ struct AddressLookupMessage *msg;
+ struct GNUNET_TIME_Absolute abs_timeout;
+ struct AddressLookupCtx *aluCB;
+ struct GNUNET_CLIENT_Connection *client;
+ char *addrbuf;
- if (len >= GNUNET_SERVER_MAX_MESSAGE_SIZE)
- {
- GNUNET_break (0);
- aluc (aluc_cls, NULL);
- return;
- }
- client = GNUNET_CLIENT_connect (sched, "transport", cfg);
- if (client == NULL)
- {
- aluc (aluc_cls, NULL);
- return;
- }
- abs_timeout = GNUNET_TIME_relative_to_absolute(timeout);
- msg = GNUNET_malloc (len);
- msg->header->size = htons (len);
- msg->header->type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_LOOKUP);
- msg->timeout = GNUNET_TIME_absolute_hton(abs_timeout);
- msg->addrlen = htonl (addressLen);
- char *addrbuf = (char*) &msg[1];
- memcpy (addrbuf, address, addressLen);
- char *tbuf = &addrbuf[addressLen];
- memcpy (tbuf, nameTrans, strlen(nameTrans) + 1);
- aluCB = GNUNET_malloc (sizeof (struct AddressLookUpCB));
- aluCB->cb = aluc;
- aluCB->cb_cls = aluc_cls;
- aluCB->timeout = abs_timeout;
- aluCB->client = client;
- GNUNET_CLIENT_transmit_and_get_response(client, msg->header, timeout, GNUNET_YES, &address_response_processor, aluCB);
- GNUNET_free(msg);
+ slen = strlen (nameTrans) + 1;
+ len = sizeof (struct AddressLookupMessage) + addressLen + slen;
+ if (len >= GNUNET_SERVER_MAX_MESSAGE_SIZE)
+ {
+ GNUNET_break (0);
+ aluc (aluc_cls, NULL);
+ return;
+ }
+ client = GNUNET_CLIENT_connect (sched, "transport", cfg);
+ if (client == NULL)
+ {
+ aluc (aluc_cls, NULL);
+ return;
+ }
+ abs_timeout = GNUNET_TIME_relative_to_absolute (timeout);
+ msg = GNUNET_malloc (len);
+ msg->header.size = htons (len);
+ msg->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_LOOKUP);
+ msg->numeric_only = htonl (numeric);
+ msg->timeout = GNUNET_TIME_absolute_hton (abs_timeout);
+ msg->addrlen = htonl (addressLen);
+ addrbuf = (char *) &msg[1];
+ memcpy (addrbuf, address, addressLen);
+ memcpy (&addrbuf[addressLen], nameTrans, slen);
+ aluCB = GNUNET_malloc (sizeof (struct AddressLookupCtx));
+ aluCB->cb = aluc;
+ aluCB->cb_cls = aluc_cls;
+ aluCB->timeout = abs_timeout;
+ aluCB->client = client;
+ GNUNET_assert (GNUNET_OK ==
+ GNUNET_CLIENT_transmit_and_get_response (client,
+ &msg->header,
+ timeout,
+ GNUNET_YES,
+ &address_response_processor,
+ aluCB));
+ GNUNET_free (msg);
}
+
+/* end of transport_api_address_lookup.c */
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