Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
+
+/**
+ * @file transport/transport_api_peer_address_lookup.c
+ * @brief given a peer id, get all known addresses from transport service
+ *
+ * This api provides the ability to query the transport service about
+ * the status of connections to a specific peer. Calls back with a
+ * pretty printed string of the address, as formatted by the appropriate
+ * transport plugin, and whether or not the address given is currently
+ * in the 'connected' state (according to the transport service).
+ */
+
#include "platform.h"
#include "gnunet_client_lib.h"
#include "gnunet_arm_service.h"
/**
* Context for the address lookup.
*/
-struct AddressLookupCtx
+struct GNUNET_TRANSPORT_PeerIterateContext
{
/**
- * Function to call with the human-readable address.
+ * Function to call with the binary address.
*/
- GNUNET_TRANSPORT_AddressLookUpCallback cb;
+ GNUNET_TRANSPORT_PeerIterateCallback cb;
/**
* Closure for cb.
/**
* Function called with responses from the service.
*
- * @param cls our 'struct AddressLookupCtx*'
+ * @param cls our 'struct GNUNET_TRANSPORT_PeerAddressLookupContext*'
* @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)
+peer_address_response_processor (void *cls,
+ const struct GNUNET_MessageHeader *msg)
{
- struct AddressLookupCtx *alucb = cls;
- const char *address;
+ struct GNUNET_TRANSPORT_PeerIterateContext *pal_ctx = cls;
+ struct AddressIterateResponseMessage *air_msg;
+ struct GNUNET_HELLO_Address *address;
+ const char *addr;
+ const char *transport_name;
uint16_t size;
+ size_t alen;
+ size_t tlen;
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);
+ {
+ pal_ctx->cb (pal_ctx->cb_cls, NULL, NULL);
+ GNUNET_TRANSPORT_peer_get_active_addresses_cancel (pal_ctx);
+ return;
+ }
size = ntohs (msg->size);
+ GNUNET_break (ntohs (msg->type) ==
+ GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_ITERATE_RESPONSE);
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;
- }
+ {
+ /* done! */
+ pal_ctx->cb (pal_ctx->cb_cls, NULL, NULL);
+ GNUNET_TRANSPORT_peer_get_active_addresses_cancel (pal_ctx);
+ return;
+ }
+
+ if ((size <
+ sizeof (struct GNUNET_MessageHeader) +
+ sizeof (struct AddressIterateResponseMessage)) ||
+ (ntohs (msg->type) !=
+ GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_ITERATE_RESPONSE))
+ {
+ GNUNET_break (0);
+ pal_ctx->cb (pal_ctx->cb_cls, NULL, NULL);
+ GNUNET_TRANSPORT_peer_get_active_addresses_cancel (pal_ctx);
+ return;
+ }
+
+ air_msg = (struct AddressIterateResponseMessage *) msg;
+ tlen = ntohl (air_msg->pluginlen);
+ alen = ntohl (air_msg->addrlen);
+
+ if (size != sizeof (struct AddressIterateResponseMessage) + tlen + alen)
+ {
+ GNUNET_break (0);
+ pal_ctx->cb (pal_ctx->cb_cls, NULL, NULL);
+ GNUNET_TRANSPORT_peer_get_active_addresses_cancel (pal_ctx);
+ return;
+ }
+
+ addr = (const char *) &air_msg[1];
+ transport_name = &addr[alen];
+
+ if (transport_name[tlen - 1] != '\0')
+ {
+ GNUNET_break_op (0);
+ pal_ctx->cb (pal_ctx->cb_cls, NULL, NULL);
+ GNUNET_TRANSPORT_peer_get_active_addresses_cancel (pal_ctx);
+ 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);
+ GNUNET_CLIENT_receive (pal_ctx->client, &peer_address_response_processor,
+ pal_ctx,
+ GNUNET_TIME_absolute_get_remaining (pal_ctx->timeout));
+
+ /* notify client */
+ address =
+ GNUNET_HELLO_address_allocate (&air_msg->peer, transport_name, addr,
+ alen);
+ pal_ctx->cb (pal_ctx->cb_cls, &air_msg->peer, address);
+ GNUNET_HELLO_address_free (address);
}
/**
- * Convert a binary address into a human readable address.
+ * Return all the known addresses for a specific peer or all peers.
+ * Returns continously all address if one_shot is set to GNUNET_NO
+ *
+ * CHANGE: Returns the address(es) that we are currently using for this
+ * peer. Upon completion, the 'AddressLookUpCallback' is called one more
+ * time with 'NULL' for the address and the peer. After this, the operation must no
+ * longer be explicitly cancelled.
*
* @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 peer peer identity to look up the addresses of, CHANGE: allow NULL for all (connected) peers
+ * @param one_shot GNUNET_YES to return the current state and then end (with NULL+NULL),
+ * GNUNET_NO to monitor the set of addresses used (continuously, must be explicitly cancelled)
* @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
+ * @param peer_address_callback function to call with the results
+ * @param peer_address_callback_cls closure for peer_address_callback
*/
-void
-GNUNET_TRANSPORT_address_lookup (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)
+struct GNUNET_TRANSPORT_PeerIterateContext *
+GNUNET_TRANSPORT_peer_get_active_addresses (const struct
+ GNUNET_CONFIGURATION_Handle *cfg,
+ const struct GNUNET_PeerIdentity
+ *peer, int one_shot,
+ struct GNUNET_TIME_Relative timeout,
+ GNUNET_TRANSPORT_PeerIterateCallback
+ peer_address_callback,
+ void *peer_address_callback_cls)
{
- size_t slen;
- size_t len;
- struct AddressLookupMessage *msg;
- struct AddressLookupCtx *aluCB;
+ struct GNUNET_TRANSPORT_PeerIterateContext *pal_ctx;
+ struct AddressIterateMessage msg;
struct GNUNET_CLIENT_Connection *client;
- char *addrbuf;
-
- 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;
- }
+ struct GNUNET_TIME_Absolute abs_timeout;
+
+ if (GNUNET_YES != one_shot)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Address monitoring not implemented\n");
+ return NULL;
+ }
client = GNUNET_CLIENT_connect ("transport", cfg);
if (client == NULL)
- {
- aluc (aluc_cls, NULL);
- return;
- }
- 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 (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 = GNUNET_TIME_relative_to_absolute (timeout);
- aluCB->client = client;
+ return NULL;
+ abs_timeout = GNUNET_TIME_relative_to_absolute (timeout);
+ msg.header.size = htons (sizeof (struct AddressIterateMessage));
+ msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_ITERATE);
+ msg.one_shot = htonl (one_shot);
+ msg.timeout = GNUNET_TIME_absolute_hton (abs_timeout);
+ if (peer == NULL)
+ memset (&msg.peer, 0, sizeof (struct GNUNET_PeerIdentity));
+ else
+ msg.peer = *peer;
+ pal_ctx = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_PeerIterateContext));
+ pal_ctx->cb = peer_address_callback;
+ pal_ctx->cb_cls = peer_address_callback_cls;
+ pal_ctx->timeout = abs_timeout;
+ pal_ctx->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);
+ GNUNET_CLIENT_transmit_and_get_response (client, &msg.header,
+ timeout, GNUNET_YES,
+ &peer_address_response_processor,
+ pal_ctx));
+ return pal_ctx;
+}
+
+
+/**
+ * Cancel request for address conversion.
+ *
+ * @param alc handle for the request to cancel
+ */
+void
+GNUNET_TRANSPORT_peer_get_active_addresses_cancel (struct
+ GNUNET_TRANSPORT_PeerIterateContext
+ *alc)
+{
+ GNUNET_CLIENT_disconnect (alc->client, GNUNET_NO);
+ GNUNET_free (alc);
}
-/* end of transport_api_address_lookup.c */
+
+/* end of transport_api_peer_address_lookup.c */
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