layer_state_t contiki_io_layer_connect(
layer_connectivity_t* context
, const void* data
, const layer_hint_t hint )
{
XI_UNUSED( hint );
uip_ipaddr_t *ip;
resolv_status_t dns_status;
xi_connection_data_t* connection_data;
layer_t* layer = ( layer_t* ) context->self;
contiki_data_t* s = (contiki_data_t* ) layer->user_data;
struct uip_conn *c;
s->process = PROCESS_CURRENT();
if (s->state == CONNECTED) {
xi_debug_logger( "Connecting to the endpoint [ok]" );
return LAYER_STATE_OK;
} else if (s->state == CONNECTING) {
return LAYER_STATE_WANT_WRITE;
} else if (s->state == CLOSED) {
connection_data = ( xi_connection_data_t* ) data;
dns_status = resolv_lookup(connection_data->address, &ip);
if (dns_status != RESOLV_STATUS_CACHED) {
if (dns_status == RESOLV_STATUS_NOT_FOUND || dns_status == RESOLV_STATUS_ERROR) {
xi_debug_logger( "Getting Host by name [failed]" );
xi_set_err( XI_SOCKET_GETHOSTBYNAME_ERROR );
return LAYER_STATE_ERROR;
}
if (dns_status != RESOLV_STATUS_RESOLVING) {
resolv_query(connection_data->address);
}
return LAYER_STATE_WANT_WRITE; /* no IP, cannot go further */
}
xi_debug_logger( "Getting Host by name [ok]" );
xi_debug_logger( "Connecting to the endpoint..." );
c = uip_connect(ip, uip_htons(connection_data->port));
if(c == NULL) {
xi_debug_logger( "Connecting to the endpoint [failed]" );
xi_set_err( XI_SOCKET_CONNECTION_ERROR );
return LAYER_STATE_ERROR;
}
s->state = CONNECTING;
c->appstate.p = &xively_process;
c->appstate.state = s;
tcpip_poll_tcp(c);
return LAYER_STATE_WANT_WRITE;
}
return LAYER_STATE_ERROR;
}
/*---------------------------------------------------------------------------*/
static void
pollhandler(void)
{
if(ctk_mode_get() == CTK_MODE_EXTERNAL) {
if(CIA1.prb == 0x7f) {
ctkmode();
} else if(kbhit() && conn != NULL) {
tcpip_poll_tcp(conn);
}
}
}
// Disconnect from the server
int mqtt_disconnect()
{
if(!process_is_running(&mqtt_process))
return -1;
printf("mqtt: exiting...\n");
mqtt_flags &= ~MQTT_FLAG_READY;
mqtt_flags |= MQTT_FLAG_EXIT;
tcpip_poll_tcp(mqtt_state.tcp_connection);
return 0;
}
int mqtt_unsubscribe(const char* topic)
{
if(!mqtt_ready())
return -1;
printf("sending unsubscribe\n");
mqtt_state.outbound_message = mqtt_msg_unsubscribe(&mqtt_state.mqtt_connection, topic,
&mqtt_state.pending_msg_id);
mqtt_flags &= ~MQTT_FLAG_READY;
mqtt_state.pending_msg_type = MQTT_MSG_TYPE_UNSUBSCRIBE;
tcpip_poll_tcp(mqtt_state.tcp_connection);
return 0;
}
struct uip_conn *
tcp_connect(uip_ipaddr_t *ripaddr, uint16_t port, void *appstate)
{
struct uip_conn *c;
c = uip_connect(ripaddr, port);
if(c == NULL) {
return NULL;
}
c->appstate.p = PROCESS_CURRENT();
c->appstate.state = appstate;
tcpip_poll_tcp(c);
return c;
}
// Publish the specified message
int mqtt_publish_with_length(const char* topic, const char* data, int data_length, int qos, int retain)
{
if(!mqtt_ready())
return -1;
printf("mqtt: sending publish...\n");
mqtt_state.outbound_message = mqtt_msg_publish(&mqtt_state.mqtt_connection,
topic, data, data_length,
qos, retain,
&mqtt_state.pending_msg_id);
mqtt_flags &= ~MQTT_FLAG_READY;
mqtt_state.pending_msg_type = MQTT_MSG_TYPE_PUBLISH;
tcpip_poll_tcp(mqtt_state.tcp_connection);
return 0;
}
struct uip_conn *
tcp_connect(uip_ipaddr_t *ripaddr, uint16_t port, void *appstate)
{
struct uip_conn *c;
c = uip_connect(ripaddr, port);
if(c == NULL) {
return NULL;
}
c->appstate.state = appstate;
c->appstate.conn_id = last_conn_id++;
tcpip_poll_tcp(c);
return c;
}
/*-----------------------------------------------------------------------------------*/
uint16_t
websocket_http_client_send(struct websocket_http_client_state *s,
const uint8_t *data, uint16_t datalen)
{
int len;
len = MIN(datalen, sizeof(s->outputbuf) - s->outputbufptr);
if(len != datalen) {
/* Could not send, return the length of the available data buffer
instead. */
printf("websocket_http_client_send: could not send %d bytes, only %d available\n",
datalen, len);
return len;
}
/* printf("Putting %d bytes of data on outputbuf, ptr is %d\n", len, s->outputbufptr);*/
memcpy(&s->outputbuf[s->outputbufptr], data, len);
s->outputbufptr += len;
tcpip_poll_tcp(s->conn);
return len;
}