/**
* Broadcast information about the given entry to all
* clients that care.
*
* @param entry entry to broadcast about
*/
static void
notify_all (struct HostEntry *entry)
{
struct InfoMessage *msg_pub;
struct InfoMessage *msg_friend;
struct NotificationContext *cur;
msg_pub = make_info_message (entry, GNUNET_NO);
msg_friend = make_info_message (entry, GNUNET_YES);
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Notifying all clients about peer `%s'\n",
GNUNET_i2s(&entry->identity));
for (cur = nc_head; NULL != cur; cur = cur->next)
{
if (GNUNET_NO == cur->include_friend_only)
{
GNUNET_SERVER_notification_context_unicast (notify_list,
cur->client,
&msg_pub->header,
GNUNET_NO);
}
if (GNUNET_YES == cur->include_friend_only)
{
GNUNET_SERVER_notification_context_unicast (notify_list,
cur->client,
&msg_friend->header,
GNUNET_NO);
}
}
GNUNET_free (msg_pub);
GNUNET_free (msg_friend);
}
/**
* Handler for START message from client, sends information
* about all identities to the client immediately and
* adds the client to the notification context for future
* updates.
*
* @param cls unused
* @param client who sent the message
* @param message the message received
*/
static void
handle_start_message (void *cls, struct GNUNET_SERVER_Client *client,
const struct GNUNET_MessageHeader *message)
{
struct GNUNET_IDENTITY_UpdateMessage *um;
struct GNUNET_IDENTITY_UpdateMessage ume;
struct Ego *ego;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Received START message from client\n");
GNUNET_SERVER_notification_context_add (nc, client);
for (ego = ego_head; NULL != ego; ego = ego->next)
{
um = create_update_message (ego);
GNUNET_SERVER_notification_context_unicast (nc, client, &um->header, GNUNET_NO);
GNUNET_free (um);
}
memset (&ume, 0, sizeof (ume));
ume.header.type = htons (GNUNET_MESSAGE_TYPE_IDENTITY_UPDATE);
ume.header.size = htons (sizeof (struct GNUNET_IDENTITY_UpdateMessage));
ume.end_of_list = htons (GNUNET_YES);
ume.name_len = htons (0);
GNUNET_SERVER_notification_context_unicast (nc, client, &ume.header, GNUNET_NO);
GNUNET_SERVER_receive_done (client, GNUNET_OK);
}
/**
* Send shorten response back to client
*
* @param cls the closure containing a client shorten handle
* @param name the shortened name result or NULL if cannot be shortened
*/
static void
send_shorten_response(void* cls, const char* name)
{
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending `%s' message with %s\n",
"SHORTEN_RESULT", name);
struct GNUNET_GNS_ClientShortenResultMessage *rmsg;
struct ClientShortenHandle *csh = (struct ClientShortenHandle *)cls;
if (name == NULL)
{
name = "";
}
rmsg = GNUNET_malloc(sizeof(struct GNUNET_GNS_ClientShortenResultMessage)
+ strlen(name) + 1);
rmsg->id = csh->unique_id;
rmsg->header.type = htons(GNUNET_MESSAGE_TYPE_GNS_SHORTEN_RESULT);
rmsg->header.size =
htons(sizeof(struct GNUNET_GNS_ClientShortenResultMessage) +
strlen(name) + 1);
strcpy((char*)&rmsg[1], name);
GNUNET_SERVER_notification_context_unicast (nc, csh->client,
(const struct GNUNET_MessageHeader *) rmsg,
GNUNET_NO);
GNUNET_SERVER_receive_done (csh->client, GNUNET_OK);
GNUNET_free(rmsg);
GNUNET_free_non_null(csh->name);
GNUNET_free_non_null(csh->zone_key);
GNUNET_free(csh);
}
/**
* Send a result code back to the client.
*
* @param client client that should receive the result code
* @param result_code code to transmit
* @param emsg error message to include (or NULL for none)
*/
static void
send_result_code (struct GNUNET_SERVER_Client *client,
uint32_t result_code,
const char *emsg)
{
struct GNUNET_IDENTITY_ResultCodeMessage *rcm;
size_t elen;
if (NULL == emsg)
elen = 0;
else
elen = strlen (emsg) + 1;
rcm = GNUNET_malloc (sizeof (struct GNUNET_IDENTITY_ResultCodeMessage) + elen);
rcm->header.type = htons (GNUNET_MESSAGE_TYPE_IDENTITY_RESULT_CODE);
rcm->header.size = htons (sizeof (struct GNUNET_IDENTITY_ResultCodeMessage) + elen);
rcm->result_code = htonl (result_code);
if (0 < elen)
memcpy (&rcm[1], emsg, elen);
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Sending result %d (%s) to client\n",
(int) result_code,
emsg);
GNUNET_SERVER_notification_context_unicast (nc, client, &rcm->header, GNUNET_NO);
GNUNET_free (rcm);
}
/**
* Broadcast the new active address to all clients monitoring the peer.
*
* @param peer peer this update is about (never NULL)
* @param address address, NULL on disconnect
* @param state the current state of the peer
* @param state_timeout the time out for the state
*/
void
GST_clients_broadcast_peer_notification (const struct GNUNET_PeerIdentity *peer,
const struct GNUNET_HELLO_Address *address,
enum GNUNET_TRANSPORT_PeerState state,
struct GNUNET_TIME_Absolute state_timeout)
{
struct PeerIterateResponseMessage *msg;
struct MonitoringClient *mc;
static struct GNUNET_PeerIdentity all_zeros;
msg = compose_address_iterate_response_message (peer, address);
msg->state = htonl (state);
msg->state_timeout = GNUNET_TIME_absolute_hton (state_timeout);
mc = peer_monitoring_clients_head;
while (mc != NULL)
{
if ((0 == memcmp (&mc->peer, &all_zeros,
sizeof (struct GNUNET_PeerIdentity))) ||
(0 == memcmp (&mc->peer, peer,
sizeof (struct GNUNET_PeerIdentity))))
{
GNUNET_SERVER_notification_context_unicast (peer_nc, mc->client,
&msg->header, GNUNET_NO);
}
mc = mc->next;
}
GNUNET_free (msg);
}
/**
* Send a message to one of our clients.
*
* @param client target for the message
* @param msg message to transmit
* @param can_drop could this message be dropped if the
* client's queue is getting too large?
*/
static void
send_to_client (struct GSC_Client *client,
const struct GNUNET_MessageHeader *msg,
int can_drop)
{
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Preparing to send %u bytes of message of type %u to client.\n",
(unsigned int) ntohs (msg->size),
(unsigned int) ntohs (msg->type));
GNUNET_SERVER_notification_context_unicast (notifier, client->client_handle,
msg, can_drop);
}
/**
* FIXME.
*/
static int
do_notify_entry (void *cls, const GNUNET_HashCode * key, void *value)
{
struct GNUNET_SERVER_Client *client = cls;
struct HostEntry *he = value;
struct InfoMessage *msg;
msg = make_info_message (he);
GNUNET_SERVER_notification_context_unicast (notify_list, client, &msg->header,
GNUNET_NO);
GNUNET_free (msg);
return GNUNET_YES;
}
/**
* Handle result, pass it back to the client.
*
* @param cls the struct ClientEntry of the client searching
* @param id Peer providing a regex that matches the string.
* @param get_path Path of the get request.
* @param get_path_length Lenght of @a get_path.
* @param put_path Path of the put request.
* @param put_path_length Length of the @a put_path.
*/
static void
handle_search_result (void *cls,
const struct GNUNET_PeerIdentity *id,
const struct GNUNET_PeerIdentity *get_path,
unsigned int get_path_length,
const struct GNUNET_PeerIdentity *put_path,
unsigned int put_path_length)
{
struct ClientEntry *ce = cls;
struct ResultMessage *result;
struct GNUNET_PeerIdentity *gp;
uint16_t size;
if ( (get_path_length >= 65536) ||
(put_path_length >= 65536) ||
( (get_path_length + put_path_length) * sizeof (struct GNUNET_PeerIdentity))
+ sizeof (struct ResultMessage) >= GNUNET_SERVER_MAX_MESSAGE_SIZE)
{
GNUNET_break (0);
return;
}
size = (get_path_length + put_path_length) * sizeof (struct GNUNET_PeerIdentity) + sizeof (struct ResultMessage);
result = GNUNET_malloc (size);
result->header.size = htons (size);
result->header.type = htons (GNUNET_MESSAGE_TYPE_REGEX_RESULT);
result->get_path_length = htons ((uint16_t) get_path_length);
result->put_path_length = htons ((uint16_t) put_path_length);
result->id = *id;
gp = &result->id;
GNUNET_memcpy (&gp[1],
get_path,
get_path_length * sizeof (struct GNUNET_PeerIdentity));
GNUNET_memcpy (&gp[1 + get_path_length],
put_path,
put_path_length * sizeof (struct GNUNET_PeerIdentity));
GNUNET_SERVER_notification_context_unicast (nc,
ce->client,
&result->header, GNUNET_NO);
GNUNET_free (result);
}
/**
* Send get authority response back to client
*
* @param cls the closure containing a client get auth handle
* @param name the shortened name result or NULL if cannot be shortened
*/
static void
send_get_auth_response(void *cls, const char* name)
{
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending `%s' message with %s\n",
"GET_AUTH_RESULT", name);
struct GNUNET_GNS_ClientGetAuthResultMessage *rmsg;
struct ClientGetAuthHandle *cah = (struct ClientGetAuthHandle *)cls;
if (name == NULL)
{
name = "";
}
rmsg = GNUNET_malloc(sizeof(struct GNUNET_GNS_ClientGetAuthResultMessage)
+ strlen(name) + 1);
rmsg->id = cah->unique_id;
rmsg->header.type = htons(GNUNET_MESSAGE_TYPE_GNS_GET_AUTH_RESULT);
rmsg->header.size =
htons(sizeof(struct GNUNET_GNS_ClientGetAuthResultMessage) +
strlen(name) + 1);
strcpy((char*)&rmsg[1], name);
GNUNET_SERVER_notification_context_unicast (nc, cah->client,
(const struct GNUNET_MessageHeader *) rmsg,
GNUNET_NO);
GNUNET_SERVER_receive_done (cah->client, GNUNET_OK);
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Cleaning up handles...\n");
GNUNET_free(rmsg);
GNUNET_free_non_null(cah->name);
GNUNET_free(cah);
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "done.\n");
}
/**
* Broadcast the new validation changes to all clients monitoring the peer.
*
* @param peer peer this update is about (never NULL)
* @param address address, NULL on disconnect
* @param last_validation point in time when last validation was performed
* @param valid_until point in time how long address is valid
* @param next_validation point in time when next validation will be performed
* @param state state of validation notification
*/
void
GST_clients_broadcast_validation_notification (
const struct GNUNET_PeerIdentity *peer,
const struct GNUNET_HELLO_Address *address,
struct GNUNET_TIME_Absolute last_validation,
struct GNUNET_TIME_Absolute valid_until,
struct GNUNET_TIME_Absolute next_validation,
enum GNUNET_TRANSPORT_ValidationState state)
{
struct ValidationIterateResponseMessage *msg;
struct MonitoringClient *mc;
static struct GNUNET_PeerIdentity all_zeros;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Sending information about for validation entry for peer `%s' using address `%s'\n",
GNUNET_i2s(peer), (address != NULL) ? GST_plugins_a2s (address) : "<none>");
msg = compose_validation_iterate_response_message (peer, address);
msg->last_validation = GNUNET_TIME_absolute_hton(last_validation);
msg->valid_until = GNUNET_TIME_absolute_hton(valid_until);
msg->next_validation = GNUNET_TIME_absolute_hton(next_validation);
msg->state = htonl ((uint32_t) state);
mc = val_monitoring_clients_head;
while (mc != NULL)
{
if ((0 == memcmp (&mc->peer, &all_zeros,
sizeof (struct GNUNET_PeerIdentity))) ||
(0 == memcmp (&mc->peer, peer,
sizeof (struct GNUNET_PeerIdentity))))
{
GNUNET_SERVER_notification_context_unicast (val_nc, mc->client,
&msg->header, GNUNET_NO);
}
mc = mc->next;
}
GNUNET_free (msg);
}
/**
* Reply to client with the result from our lookup.
*
* @param cls the closure (our client lookup handle)
* @param rd_count the number of records
* @param rd the record data
*/
static void
send_lookup_response(void* cls,
uint32_t rd_count,
const struct GNUNET_NAMESTORE_RecordData *rd)
{
struct ClientLookupHandle* clh = (struct ClientLookupHandle*)cls;
struct GNUNET_GNS_ClientLookupResultMessage *rmsg;
size_t len;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending `%s' message with %d results\n",
"LOOKUP_RESULT", rd_count);
len = GNUNET_NAMESTORE_records_get_size (rd_count, rd);
rmsg = GNUNET_malloc(len+sizeof(struct GNUNET_GNS_ClientLookupResultMessage));
rmsg->id = clh->unique_id;
rmsg->rd_count = htonl(rd_count);
rmsg->header.type = htons(GNUNET_MESSAGE_TYPE_GNS_LOOKUP_RESULT);
rmsg->header.size =
htons(len+sizeof(struct GNUNET_GNS_ClientLookupResultMessage));
GNUNET_NAMESTORE_records_serialize (rd_count, rd, len, (char*)&rmsg[1]);
GNUNET_SERVER_notification_context_unicast (nc, clh->client,
(const struct GNUNET_MessageHeader *) rmsg,
GNUNET_NO);
GNUNET_SERVER_receive_done (clh->client, GNUNET_OK);
GNUNET_free(rmsg);
GNUNET_free(clh->name);
if (NULL != clh->zone_key)
GNUNET_free(clh->zone_key);
GNUNET_free(clh);
}
/**
* Handler for GET_DEFAULT message from client, returns
* default identity for some service.
*
* @param cls unused
* @param client who sent the message
* @param message the message received
*/
static void
handle_get_default_message (void *cls, struct GNUNET_SERVER_Client *client,
const struct GNUNET_MessageHeader *message)
{
const struct GNUNET_IDENTITY_GetDefaultMessage *gdm;
struct GNUNET_IDENTITY_SetDefaultMessage *sdm;
uint16_t size;
uint16_t name_len;
struct Ego *ego;
const char *name;
char *identifier;
size = ntohs (message->size);
if (size <= sizeof (struct GNUNET_IDENTITY_GetDefaultMessage))
{
GNUNET_break (0);
GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
return;
}
gdm = (const struct GNUNET_IDENTITY_GetDefaultMessage *) message;
name = (const char *) &gdm[1];
name_len = ntohs (gdm->name_len);
if ( (name_len + sizeof (struct GNUNET_IDENTITY_GetDefaultMessage) != size) ||
(0 != ntohs (gdm->reserved)) ||
('\0' != name[name_len - 1]) )
{
GNUNET_break (0);
GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
return;
}
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Received GET_DEFAULT for service `%s' from client\n",
name);
if (GNUNET_OK !=
GNUNET_CONFIGURATION_get_value_string (subsystem_cfg,
name,
"DEFAULT_IDENTIFIER",
&identifier))
{
send_result_code (client, 1, gettext_noop ("no default known"));
GNUNET_SERVER_receive_done (client, GNUNET_OK);
return;
}
for (ego = ego_head; NULL != ego; ego = ego->next)
{
if (0 == strcmp (ego->identifier,
identifier))
{
sdm = create_set_default_message (ego,
name);
GNUNET_SERVER_notification_context_unicast (nc, client,
&sdm->header, GNUNET_NO);
GNUNET_free (sdm);
GNUNET_SERVER_receive_done (client, GNUNET_OK);
GNUNET_free (identifier);
return;
}
}
GNUNET_free (identifier);
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Failed to find ego `%s'\n",
name);
send_result_code (client, 1,
gettext_noop ("default configured, but ego unknown (internal error)"));
GNUNET_SERVER_receive_done (client, GNUNET_OK);
}