1 files changed, 184 insertions, 0 deletions

diff --git a/src/transport/transport_api_address_to_string.c b/src/transport/transport_api_address_to_string.c
new file mode 100644
index 000000000..259c77152
--- /dev/null
+++ b/src/transport/transport_api_address_to_string.c
@@ -0,0 +1,184 @@
+/*
+     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_hello_lib.h"
+#include "gnunet_protocols.h"
+#include "gnunet_server_lib.h"
+#include "gnunet_time_lib.h"
+#include "gnunet_transport_service.h"
+#include "transport.h"
+
+/**
+ * Context for the address lookup.
+ */
+struct GNUNET_TRANSPORT_AddressToStringContext
+{
+  /**
+   * Function to call with the human-readable address.
+   */
+  GNUNET_TRANSPORT_AddressToStringCallback 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;
+};
+
+
+/**
+ * Function called with responses from the service.
+ *
+ * @param cls our 'struct GNUNET_TRANSPORT_AddressLookupContext*'
+ * @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)
+{
+  struct GNUNET_TRANSPORT_AddressToStringContext *alucb = cls;
+  const char *address;
+  uint16_t size;
+
+  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 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
+ * @return handle to cancel the operation, NULL on error
+ */
+struct GNUNET_TRANSPORT_AddressToStringContext *
+GNUNET_TRANSPORT_address_to_string (const struct GNUNET_CONFIGURATION_Handle *cfg,
+                                 const struct GNUNET_HELLO_Address *address,
+                                 int numeric,
+                                 struct GNUNET_TIME_Relative timeout,
+                                 GNUNET_TRANSPORT_AddressToStringCallback aluc,
+                                 void *aluc_cls)
+{
+  size_t len;
+  size_t alen;
+  struct AddressLookupMessage *msg;
+  struct GNUNET_TRANSPORT_AddressToStringContext *alc;
+  struct GNUNET_CLIENT_Connection *client;
+  char *addrbuf;
+
+  alen = GNUNET_HELLO_address_get_size (address);
+  len = sizeof (struct AddressLookupMessage) + alen;
+  if (len >= GNUNET_SERVER_MAX_MESSAGE_SIZE)
+  {
+    GNUNET_break (0);
+    return NULL;
+  }
+  client = GNUNET_CLIENT_connect ("transport", cfg);
+  if (client == NULL)
+    return NULL;
+  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_relative_hton (timeout);
+  msg->addrlen = htonl (alen);
+  addrbuf = (char *) &msg[1];
+  memcpy (addrbuf, address, alen);
+  alc = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_AddressToStringContext));
+  alc->cb = aluc;
+  alc->cb_cls = aluc_cls;
+  alc->timeout = GNUNET_TIME_relative_to_absolute (timeout);
+  alc->client = client;
+  GNUNET_assert (GNUNET_OK ==
+                 GNUNET_CLIENT_transmit_and_get_response (client, &msg->header,
+                                                          timeout, GNUNET_YES,
+                                                          &address_response_processor,
+                                                          alc));
+  GNUNET_free (msg);
+  return alc;
+}
+
+
+/**
+ * Cancel request for address conversion.
+ *
+ * @param alc handle for the request to cancel
+ */
+void
+GNUNET_TRANSPORT_address_to_string_cancel (struct
+                                        GNUNET_TRANSPORT_AddressToStringContext
+                                        *alc)
+{
+  GNUNET_CLIENT_disconnect (alc->client, GNUNET_NO);
+  GNUNET_free (alc);
+}
+
+
+
+/* end of transport_api_address_lookup.c */