-/* tab:4
+/*
* "Copyright (c) 2005 Stanford University. All rights reserved.
*
* Permission to use, copy, modify, and distribute this software and
interface Receive as Snoop[am_id_t id];
interface AMPacket;
interface Packet;
+ interface SendNotifier[am_id_t id];
+ interface RadioBackoff[am_id_t id];
}
+
uses {
interface Send as SubSend;
interface Receive as SubReceive;
interface CC2420PacketBody;
interface CC2420Config;
interface ActiveMessageAddress;
+ interface RadioBackoff as SubBackoff;
}
}
implementation {
header->type = id;
header->dest = addr;
header->destpan = call CC2420Config.getPanAddr();
+ header->src = call AMPacket.address();
+
+ signal SendNotifier.aboutToSend[id](addr, msg);
return call SubSend.send( msg, len + CC2420_SIZE );
}
return call Packet.maxPayloadLength();
}
- command void* AMSend.getPayload[am_id_t id](message_t* m) {
- return call Packet.getPayload(m, NULL);
- }
-
- /***************** Receive Commands ****************/
- command void* Receive.getPayload[am_id_t id](message_t* m, uint8_t* len) {
- return call Packet.getPayload(m, len);
- }
-
- command uint8_t Receive.payloadLength[am_id_t id](message_t* m) {
- return call Packet.payloadLength(m);
- }
-
- /***************** Snoop Commands ****************/
- command void* Snoop.getPayload[am_id_t id](message_t* m, uint8_t* len) {
+ command void* AMSend.getPayload[am_id_t id](message_t* m, uint8_t len) {
return call Packet.getPayload(m, len);
}
- command uint8_t Snoop.payloadLength[am_id_t id](message_t* m) {
- return call Packet.payloadLength(m);
- }
-
/***************** AMPacket Commands ****************/
command am_addr_t AMPacket.address() {
return call ActiveMessageAddress.amAddress();
/***************** Packet Commands ****************/
command void Packet.clear(message_t* msg) {
+ memset(call CC2420PacketBody.getHeader(msg), 0x0, sizeof(cc2420_header_t));
+ memset(call CC2420PacketBody.getMetadata(msg), 0x0, sizeof(cc2420_metadata_t));
}
command uint8_t Packet.payloadLength(message_t* msg) {
return TOSH_DATA_LENGTH;
}
- command void* Packet.getPayload(message_t* msg, uint8_t* len) {
- if (len != NULL) {
- *len = call Packet.payloadLength(msg);
- }
- return msg->data;
+ command void* Packet.getPayload(message_t* msg, uint8_t len) {
+ return call SubSend.getPayload(msg, len);
}
/***************** SubReceive Events ****************/
event message_t* SubReceive.receive(message_t* msg, void* payload, uint8_t len) {
+
+ if(!(call CC2420PacketBody.getMetadata(msg))->crc) {
+ return msg;
+ }
+
if (call AMPacket.isForMe(msg)) {
return signal Receive.receive[call AMPacket.type(msg)](msg, payload, len - CC2420_SIZE);
}
event void CC2420Config.syncDone( error_t error ) {
}
+
+ /***************** RadioBackoff ***********************/
+
+ async event void SubBackoff.requestInitialBackoff(message_t *msg) {
+ signal RadioBackoff.requestInitialBackoff[(TCAST(cc2420_header_t* ONE,
+ (uint8_t*)msg + offsetof(message_t, data) - sizeof(cc2420_header_t)))->type](msg);
+ }
+
+ async event void SubBackoff.requestCongestionBackoff(message_t *msg) {
+ signal RadioBackoff.requestCongestionBackoff[(TCAST(cc2420_header_t* ONE,
+ (uint8_t*)msg + offsetof(message_t, data) - sizeof(cc2420_header_t)))->type](msg);
+ }
+ async event void SubBackoff.requestCca(message_t *msg) {
+ // Lower layers than this do not configure the CCA settings
+ signal RadioBackoff.requestCca[(TCAST(cc2420_header_t* ONE,
+ (uint8_t*)msg + offsetof(message_t, data) - sizeof(cc2420_header_t)))->type](msg);
+ }
+
+ async command void RadioBackoff.setInitialBackoff[am_id_t amId](uint16_t backoffTime) {
+ call SubBackoff.setInitialBackoff(backoffTime);
+ }
+
+ /**
+ * Must be called within a requestCongestionBackoff event
+ * @param backoffTime the amount of time in some unspecified units to backoff
+ */
+ async command void RadioBackoff.setCongestionBackoff[am_id_t amId](uint16_t backoffTime) {
+ call SubBackoff.setCongestionBackoff(backoffTime);
+ }
+
+
+ /**
+ * Enable CCA for the outbound packet. Must be called within a requestCca
+ * event
+ * @param ccaOn TRUE to enable CCA, which is the default.
+ */
+ async command void RadioBackoff.setCca[am_id_t amId](bool useCca) {
+ call SubBackoff.setCca(useCca);
+ }
+
+
+
/***************** Defaults ****************/
default event message_t* Receive.receive[am_id_t id](message_t* msg, void* payload, uint8_t len) {
return msg;
}
default event void AMSend.sendDone[uint8_t id](message_t* msg, error_t err) {
- return;
}
+ default event void SendNotifier.aboutToSend[am_id_t amId](am_addr_t addr, message_t *msg) {
+ }
+ default async event void RadioBackoff.requestInitialBackoff[am_id_t id](
+ message_t *msg) {
+ }
+
+ default async event void RadioBackoff.requestCongestionBackoff[am_id_t id](
+ message_t *msg) {
+ }
+
+ default async event void RadioBackoff.requestCca[am_id_t id](
+ message_t *msg) {
+ }
+
}