uint8_t RNWK_OnPacketRx(RPHY_PacketDesc *packet) {
RNWK_ShortAddrType addr;
RMAC_MsgType type;
uint8_t res;
addr = RNWK_BUF_GET_DST_ADDR(packet->data);
if (addr==RNWK_ADDR_BROADCAST || addr==RNWK_GetThisNodeAddr()) { /* it is for me :-) */
type = RMAC_GetType(packet->data, packet->dataSize); /* get the type of the message */
if (type==RMAC_MSG_TYPE_ACK && RMAC_IsExpectedACK(packet->data, packet->dataSize)) {
/* it is an ACK, and the sequence number matches. Mark it with a flag and return, as no need for further processing */
packet->flags |= RPHY_PACKET_FLAGS_ACK;
return ERR_OK; /* no need to process the packet further */
} else if (type==RMAC_MSG_TYPE_DATA) { /* data packet received */
if (RNWK_AppOnRxCallback!=NULL) { /* do we have a callback? */
res = RNWK_AppOnRxCallback(packet); /* call upper layer */
if (res==ERR_OK) { /* all fine, now send acknowledge back */
addr = RNWK_BUF_GET_SRC_ADDR(packet->data); /* who should receive the ack? */
RNWK_BUF_SET_DST_ADDR(packet->data, addr); /* destination address is from where we got the data */
return RMAC_SendACK(packet); /* send ack message back */
}
}
} else {
return ERR_FAULT; /* wrong message type? */
}
}
return ERR_FAILED;
}
uint8_t RNWK_PutPayload(uint8_t *buf, size_t bufSize, uint8_t payloadSize, RNWK_ShortAddrType dstAddr, RPHY_FlagsType flags) {
RNWK_ShortAddrType srcAddr;
srcAddr = RNWK_GetThisNodeAddr();
RNWK_BUF_SET_SRC_ADDR(buf, srcAddr);
RNWK_BUF_SET_DST_ADDR(buf, dstAddr);
return RMAC_PutPayload(buf, bufSize, payloadSize+RNWK_HEADER_SIZE, flags);
}
uint8_t RNWK_SendACK(RPHY_PacketDesc *rxPacket, RNWK_ShortAddrType saddr) {
RNWK_ShortAddrType addr;
uint8_t buf[RMAC_BUFFER_SIZE];
RPHY_PacketDesc ackPacket;
ackPacket.flags = RPHY_PACKET_FLAGS_NONE;
ackPacket.phyData = buf;
ackPacket.phySize = sizeof(buf);
/* send an ack message back: this is is of type ack with src and dst address */
addr = RNWK_BUF_GET_SRC_ADDR(rxPacket->phyData); /* who should receive the ack? */
RNWK_BUF_SET_SRC_ADDR(ackPacket.phyData, saddr); /* set source address */
RNWK_BUF_SET_DST_ADDR(ackPacket.phyData, addr); /* destination address is from where we got the data */
return RMAC_SendACK(rxPacket, &ackPacket);
}
