From b79cba9d7fac058a00ede5f7a5a26494f9f6efe8 Mon Sep 17 00:00:00 2001
From: Mariano Alvira <mar@devl.org>
Date: Sat, 30 Apr 2011 15:24:10 -0400
Subject: [PATCH] don't do the autoack delay on RX if promiscuous --- this
 allows a sniffer to catch 802.15.4 acks.

---
 lib/maca.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/maca.c b/lib/maca.c
index 808fd5131..e6ea4a2a8 100644
--- a/lib/maca.c
+++ b/lib/maca.c
@@ -618,7 +618,7 @@ void maca_isr(void) {
 		dma_rx->rx_time = *MACA_TIMESTAMP;
 
 		/* check if received packet needs an ack */
-		if(dma_rx->data[1] & 0x20) {
+		if(prm_mode == AUTOACK && (dma_rx->data[1] & 0x20)) {
 			/* this wait is necessary to auto-ack */
 			volatile uint32_t wait_clk;
 			wait_clk = *MACA_CLK + 200;