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Added an optional rate limit for broadcast transmissions
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@ -28,7 +28,7 @@
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*
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*
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* This file is part of the Contiki operating system.
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* This file is part of the Contiki operating system.
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*
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*
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* $Id: contikimac.c,v 1.29 2010/04/05 19:28:07 adamdunkels Exp $
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* $Id: contikimac.c,v 1.30 2010/04/06 11:57:43 adamdunkels Exp $
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*/
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*/
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/**
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/**
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@ -195,6 +195,11 @@ static volatile rtimer_clock_t stream_until;
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static int last_received_seqno;
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static int last_received_seqno;
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static rimeaddr_t last_received_sender;
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static rimeaddr_t last_received_sender;
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#if CONTIKIMAC_CONF_BROADCAST_RATE_LIMIT
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static struct timer broadcast_rate_timer;
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static int broadcast_rate_counter;
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#endif /* CONTIKIMAC_CONF_BROADCAST_RATE_LIMIT */
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/*---------------------------------------------------------------------------*/
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/*---------------------------------------------------------------------------*/
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static void
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static void
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on(void)
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on(void)
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@ -492,6 +497,27 @@ format_announcement(char *hdr)
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#endif /* CONTIKIMAC_CONF_ANNOUNCEMENTS */
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#endif /* CONTIKIMAC_CONF_ANNOUNCEMENTS */
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/*---------------------------------------------------------------------------*/
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/*---------------------------------------------------------------------------*/
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static int
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static int
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broadcast_rate_drop(void)
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{
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#if CONTIKIMAC_CONF_BROADCAST_RATE_LIMIT
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if(!timer_expired(&broadcast_rate_timer)) {
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broadcast_rate_counter++;
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if(broadcast_rate_counter < CONTIKIMAC_CONF_BROADCAST_RATE_LIMIT) {
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return 0;
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} else {
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return 1;
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}
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} else {
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timer_set(&broadcast_rate_timer, CLOCK_SECOND);
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broadcast_rate_counter = 0;
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return 0;
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}
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#else /* CONTIKIMAC_CONF_BROADCAST_RATE_LIMIT */
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return 0;
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#endif /* CONTIKIMAC_CONF_BROADCAST_RATE_LIMIT */
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}
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/*---------------------------------------------------------------------------*/
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static int
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send_packet(mac_callback_t mac_callback, void *mac_callback_ptr)
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send_packet(mac_callback_t mac_callback, void *mac_callback_ptr)
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{
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{
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rtimer_clock_t t0;
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rtimer_clock_t t0;
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@ -519,6 +545,10 @@ send_packet(mac_callback_t mac_callback, void *mac_callback_ptr)
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if(rimeaddr_cmp(packetbuf_addr(PACKETBUF_ADDR_RECEIVER), &rimeaddr_null)) {
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if(rimeaddr_cmp(packetbuf_addr(PACKETBUF_ADDR_RECEIVER), &rimeaddr_null)) {
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is_broadcast = 1;
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is_broadcast = 1;
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PRINTDEBUG("contikimac: send broadcast\n");
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PRINTDEBUG("contikimac: send broadcast\n");
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if(broadcast_rate_drop()) {
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return MAC_TX_COLLISION;
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}
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} else {
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} else {
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#if UIP_CONF_IPV6
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#if UIP_CONF_IPV6
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PRINTDEBUG("contikimac: send unicast to %02x%02x:%02x%02x:%02x%02x:%02x%02x\n",
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PRINTDEBUG("contikimac: send unicast to %02x%02x:%02x%02x:%02x%02x:%02x%02x\n",
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