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added xxtea encrypted packet handling

This commit is contained in:
schneider 2011-07-14 02:42:39 +02:00
parent d8bad889d1
commit 4b36410c09
1 changed files with 25 additions and 0 deletions
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25
firmware/funk/nrf24l01p.c
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@ -1,6 +1,7 @@
#include <basic/basic.h>
#include <nrf24l01p.h>
#include "core/ssp/ssp.h"
#include "basic/xxtea.h"
#define CHANNEL_BEACON 81
#define DEFAULT_SPEED R_RF_SETUP_DR_2M
@ -78,6 +79,24 @@ void nrf_write_long(const uint8_t cmd, int len, uint8_t* data){
nrf_write_long(C_W_REGISTER|(reg), len, data)
// High-Level:
int nrf_rcv_pkt_time_xxtea(int maxtime, int maxsize,
uint8_t * pkt, uint32_t const k[4])
{
int n = nrf_rcv_pkt_time(maxtime, maxsize, pkt);
if( n ){
if( n < 2 )
return -4;
xxtea_decode(pkt, n, k);
uint16_t crc=crc16(pkt,n-2);
if( pkt[n-2] == ((crc>>8)&0xFF) && pkt[n-1] == (crc&0xFF) ){
return n;
}else{
return -5;
}
}
return n;
}
int nrf_rcv_pkt_time(int maxtime, int maxsize, uint8_t * pkt){
uint8_t buf;
@ -156,6 +175,12 @@ char nrf_snd_pkt_crc(int size, uint8_t * pkt){
return nrf_cmd_status(C_NOP);
};
char nrf_snd_pkt_xxtea(int size, uint8_t * pkt, uint32_t const k[4])
{
xxtea_encode(pkt, size, k);
return nrf_snd_pkt_crc(size, pkt);
}
void nrf_set_rx_mac(int pipe, int rxlen, int maclen, uint8_t * mac){
#ifdef SAFE
assert(maclen>=1 || maclen<=5);