* Added configurable default number of transmissions for CSMA to use when not specified using packetbuf attributes (CSMA_CONF_MAX_MAC_TRANSMISSIONS).

* Renamed packetbuf attribute PACKETBUF_ATTR_MAX_MAC_REXMIT to PACKETBUF_ATTR_MAX_MAC_TRANSMISSIONS where value 0 (attribute not set) means that default number of transmissions should be used.

core/net/mac/csma.c

@@ -28,7 +28,7 @@
  *
  * This file is part of the Contiki operating system.
  *
- * $Id: csma.c,v 1.14 2010/03/09 20:38:55 adamdunkels Exp $
+ * $Id: csma.c,v 1.15 2010/03/26 12:29:29 nifi Exp $
  */
 
 /**
@@ -60,6 +60,19 @@
 #define PRINTF(...)
 #endif /* DEBUG */
 
+#ifndef CSMA_MAX_MAC_TRANSMISSIONS
+#ifdef CSMA_CONF_MAX_MAC_TRANSMISSIONS
+#define CSMA_MAX_MAC_TRANSMISSIONS CSMA_CONF_MAX_MAC_TRANSMISSIONS
+#else
+#define CSMA_MAX_MAC_TRANSMISSIONS 1
+#endif /* CSMA_CONF_MAX_MAC_TRANSMISSIONS */
+#endif /* CSMA_MAX_MAC_TRANSMISSIONS */
+
+#if CSMA_MAX_MAC_TRANSMISSIONS < 1
+#error CSMA_CONF_MAX_MAC_TRANSMISSIONS must be at least 1.
+#error Change CSMA_CONF_MAX_MAC_TRANSMISSIONS in contiki-conf.h or in your Makefile.
+#endif /* CSMA_CONF_MAX_MAC_TRANSMISSIONS < 1 */
+
 struct queued_packet {
   struct queued_packet *next;
   struct queuebuf *buf;
@@ -179,7 +192,13 @@ send_packet(mac_callback_t sent, void *ptr)
   if(q != NULL) {
     q->buf = queuebuf_new_from_packetbuf();
     if(q != NULL) {
-      q->max_transmissions = packetbuf_attr(PACKETBUF_ATTR_MAX_MAC_REXMIT) + 1;
+      if(packetbuf_attr(PACKETBUF_ATTR_MAX_MAC_TRANSMISSIONS) == 0) {
+        /* Use default configuration for max transmissions */
+        q->max_transmissions = CSMA_MAX_MAC_TRANSMISSIONS;
+      } else {
+        q->max_transmissions =
+          packetbuf_attr(PACKETBUF_ATTR_MAX_MAC_TRANSMISSIONS);
+      }
       q->transmissions = 0;
       q->collisions = 0;
       q->deferrals = 0;

core/net/rime/collect.c

@@ -33,7 +33,7 @@
  *
  * This file is part of the Contiki operating system.
  *
- * $Id: collect.c,v 1.42 2010/03/25 08:51:07 adamdunkels Exp $
+ * $Id: collect.c,v 1.43 2010/03/26 12:29:29 nifi Exp $
  */
 
 /**
@@ -277,7 +277,7 @@ send_queued_packet(void)
       c->max_rexmits = packetbuf_attr(PACKETBUF_ATTR_MAX_REXMIT);
       PRINTF("max_rexmits %d\n", c->max_rexmits);
       packetbuf_set_attr(PACKETBUF_ATTR_RELIABLE, 1);
-      packetbuf_set_attr(PACKETBUF_ATTR_MAX_MAC_REXMIT, 2);
+      packetbuf_set_attr(PACKETBUF_ATTR_MAX_MAC_TRANSMISSIONS, 3);
       packetbuf_set_attr(PACKETBUF_ATTR_PACKET_ID, c->seqno);
       unicast_send(&c->unicast_conn, &n->addr);
       rexmit_time_scaling = c->transmissions;
@@ -382,7 +382,7 @@ send_ack(struct collect_conn *tc, const rimeaddr_t *to, int congestion, int drop
     packetbuf_set_attr(PACKETBUF_ATTR_RELIABLE, 0);
     packetbuf_set_attr(PACKETBUF_ATTR_ERELIABLE, 0);
     packetbuf_set_attr(PACKETBUF_ATTR_PACKET_ID, packet_seqno);
-    packetbuf_set_attr(PACKETBUF_ATTR_MAX_MAC_REXMIT, 2);
+    packetbuf_set_attr(PACKETBUF_ATTR_MAX_MAC_TRANSMISSIONS, 3);
     unicast_send(&tc->unicast_conn, to);
     
     PRINTF("%d.%d: collect: Sending ACK to %d.%d for %d\n",

core/net/rime/packetbuf.h

@@ -40,7 +40,7 @@
  *
  * This file is part of the Contiki operating system.
  *
- * $Id: packetbuf.h,v 1.6 2010/02/28 09:19:43 adamdunkels Exp $
+ * $Id: packetbuf.h,v 1.7 2010/03/26 12:29:29 nifi Exp $
  */
 
 /**
@@ -341,7 +341,7 @@ enum {
   PACKETBUF_ATTR_RADIO_TXPOWER,
   PACKETBUF_ATTR_LISTEN_TIME,
   PACKETBUF_ATTR_TRANSMIT_TIME,
-  PACKETBUF_ATTR_MAX_MAC_REXMIT,
+  PACKETBUF_ATTR_MAX_MAC_TRANSMISSIONS,
 
   /* Scope 1 attributes: used between two neighbors only. */
   PACKETBUF_ATTR_RELIABLE,

core/net/rime/runicast.c

@@ -34,7 +34,7 @@
  *
  * This file is part of the Contiki operating system.
  *
- * $Id: runicast.c,v 1.11 2010/03/19 13:21:59 adamdunkels Exp $
+ * $Id: runicast.c,v 1.12 2010/03/26 12:29:29 nifi Exp $
  */
 
 /**
@@ -233,7 +233,7 @@ runicast_send(struct runicast_conn *c, const rimeaddr_t *receiver,
   packetbuf_set_attr(PACKETBUF_ATTR_RELIABLE, 1);
   packetbuf_set_attr(PACKETBUF_ATTR_PACKET_TYPE, PACKETBUF_ATTR_PACKET_TYPE_DATA);
   packetbuf_set_attr(PACKETBUF_ATTR_PACKET_ID, c->sndnxt);
-  packetbuf_set_attr(PACKETBUF_ATTR_MAX_MAC_REXMIT, 2);
+  packetbuf_set_attr(PACKETBUF_ATTR_MAX_MAC_TRANSMISSIONS, 3);
   c->max_rxmit = max_retransmissions;
   c->rxmit = 0;
   c->is_tx = 1;

core/net/sicslowpan.c

@@ -32,7 +32,7 @@
  *
  * This file is part of the Contiki operating system.
  *
- * $Id: sicslowpan.c,v 1.33 2010/03/26 10:28:52 joxe Exp $
+ * $Id: sicslowpan.c,v 1.34 2010/03/26 12:29:29 nifi Exp $
  */
 /**
  * \file
@@ -1342,7 +1342,7 @@ output(uip_lladdr_t *localdest)
   packetbuf_clear();
   rime_ptr = packetbuf_dataptr();
 
-  packetbuf_set_attr(PACKETBUF_ATTR_MAX_MAC_REXMIT, 2);
+  packetbuf_set_attr(PACKETBUF_ATTR_MAX_MAC_TRANSMISSIONS, 3);
   
   if(UIP_IP_BUF->proto == UIP_PROTO_TCP) {
     /*    packetbuf_set_attr(PACKETBUF_ATTR_PACKET_TYPE,