diff --git a/core/net/rime/abc.c b/core/net/rime/abc.c
index 9bf0756be..e3b2f89d0 100644
--- a/core/net/rime/abc.c
+++ b/core/net/rime/abc.c
@@ -30,7 +30,7 @@
  *
  * Author: Adam Dunkels <adam@sics.se>
  *
- * $Id: abc.c,v 1.5 2007/03/19 19:24:36 adamdunkels Exp $
+ * $Id: abc.c,v 1.6 2007/03/19 22:10:16 adamdunkels Exp $
  */
 
 /**
@@ -65,6 +65,12 @@ abc_open(struct abc_conn *c, u16_t channel,
   list_add(channels, c);
 }
 /*---------------------------------------------------------------------------*/
+void
+abc_close(struct abc_conn *c)
+{
+  list_remove(channels, c);
+}
+/*---------------------------------------------------------------------------*/
 int
 abc_send(struct abc_conn *c)
 {
diff --git a/core/net/rime/abc.h b/core/net/rime/abc.h
index bc095acff..108d20aaa 100644
--- a/core/net/rime/abc.h
+++ b/core/net/rime/abc.h
@@ -28,7 +28,7 @@
  *
  * This file is part of the Contiki operating system.
  *
- * $Id: abc.h,v 1.6 2007/03/19 19:24:37 adamdunkels Exp $
+ * $Id: abc.h,v 1.7 2007/03/19 22:10:16 adamdunkels Exp $
  */
 
 /**
@@ -80,6 +80,8 @@ struct abc_conn {
 void abc_open(struct abc_conn *c, u16_t channel,
 	       const struct abc_callbacks *u);
 
+void abc_close(struct abc_conn *c);
+
 /**
  * \brief      Send an anonymous best-effort broadcast packet
  * \param c    The abc connection on which the packet should be sent
diff --git a/core/net/rime/ccsabc.c b/core/net/rime/ccsabc.c
index f16d741f0..e99e2fbc4 100644
--- a/core/net/rime/ccsabc.c
+++ b/core/net/rime/ccsabc.c
@@ -28,7 +28,7 @@
  *
  * This file is part of the Contiki operating system.
  *
- * $Id: ccsabc.c,v 1.3 2007/03/19 19:24:37 adamdunkels Exp $
+ * $Id: ccsabc.c,v 1.4 2007/03/19 22:10:16 adamdunkels Exp $
  */
 
 /**
@@ -71,6 +71,12 @@ ccsabc_open(struct ccsabc_conn *c, u16_t channel,
   sabc_open(&c->c, channel, &ccsabc);
 }
 /*---------------------------------------------------------------------------*/
+void
+ccsabc_close(struct ccsabc_conn *c)
+{
+  sabc_close(&c->c);
+}
+/*---------------------------------------------------------------------------*/
 int
 ccsabc_send_stubborn(struct ccsabc_conn *c, clock_time_t t)
 {
diff --git a/core/net/rime/ccsabc.h b/core/net/rime/ccsabc.h
index 5d237becb..76354016e 100644
--- a/core/net/rime/ccsabc.h
+++ b/core/net/rime/ccsabc.h
@@ -28,7 +28,7 @@
  *
  * This file is part of the Contiki operating system.
  *
- * $Id: ccsabc.h,v 1.3 2007/03/19 19:24:37 adamdunkels Exp $
+ * $Id: ccsabc.h,v 1.4 2007/03/19 22:10:16 adamdunkels Exp $
  */
 
 /**
@@ -60,6 +60,7 @@ struct ccsabc_conn {
 
 void ccsabc_open(struct ccsabc_conn *c, u16_t channel,
 		  const struct ccsabc_callbacks *u);
+void ccsabc_close(struct ccsabc_conn *c);
 
 int ccsabc_send_stubborn(struct ccsabc_conn *c, clock_time_t t);
 void ccsabc_cancel(struct ccsabc_conn *c);
diff --git a/core/net/rime/ibc.c b/core/net/rime/ibc.c
index c059259f9..b08ebd579 100644
--- a/core/net/rime/ibc.c
+++ b/core/net/rime/ibc.c
@@ -28,7 +28,7 @@
  *
  * This file is part of the Contiki operating system.
  *
- * $Id: ibc.c,v 1.4 2007/03/19 19:24:37 adamdunkels Exp $
+ * $Id: ibc.c,v 1.5 2007/03/19 22:10:16 adamdunkels Exp $
  */
 
 /**
@@ -71,6 +71,12 @@ ibc_open(struct ibc_conn *c, u16_t channel,
   c->u = u;
 }
 /*---------------------------------------------------------------------------*/
+void
+ibc_close(struct ibc_conn *c)
+{
+  abc_close(&c->c);
+}
+/*---------------------------------------------------------------------------*/
 int
 ibc_send(struct ibc_conn *c)
 {
diff --git a/core/net/rime/ibc.h b/core/net/rime/ibc.h
index 3b94ead96..9841e4475 100644
--- a/core/net/rime/ibc.h
+++ b/core/net/rime/ibc.h
@@ -28,7 +28,7 @@
  *
  * This file is part of the Contiki operating system.
  *
- * $Id: ibc.h,v 1.4 2007/03/19 19:24:37 adamdunkels Exp $
+ * $Id: ibc.h,v 1.5 2007/03/19 22:10:16 adamdunkels Exp $
  */
 
 /**
@@ -57,6 +57,7 @@ struct ibc_conn {
 
 void ibc_open(struct ibc_conn *c, u16_t channel,
 	       const struct ibc_callbacks *u);
+void ibc_close(struct ibc_conn *c);
 int ibc_send(struct ibc_conn *c);
 
 #endif /* __IBC_H__ */
diff --git a/core/net/rime/mesh.c b/core/net/rime/mesh.c
index ddae7fe3c..9200ea2e0 100644
--- a/core/net/rime/mesh.c
+++ b/core/net/rime/mesh.c
@@ -28,7 +28,7 @@
  *
  * This file is part of the Contiki operating system.
  *
- * $Id: mesh.c,v 1.3 2007/03/19 19:24:37 adamdunkels Exp $
+ * $Id: mesh.c,v 1.4 2007/03/19 22:10:17 adamdunkels Exp $
  */
 
 /**
@@ -292,6 +292,14 @@ mesh_open(const struct mesh_callbacks *callbacks,
   send_datapacket_handler = send_datapacket;
 }
 /*---------------------------------------------------------------------------*/
+void
+mesh_close(void)
+{
+  uc_close(&mc.dataconn);
+  uc_close(&mc.rrepconn);
+  nf_close(&mc.rreqconn);
+}
+/*---------------------------------------------------------------------------*/
 int
 mesh_send(rimeaddr_t *to)
 {
diff --git a/core/net/rime/mesh.h b/core/net/rime/mesh.h
index de48c7db1..c1086cfa9 100644
--- a/core/net/rime/mesh.h
+++ b/core/net/rime/mesh.h
@@ -28,7 +28,7 @@
  *
  * This file is part of the Contiki operating system.
  *
- * $Id: mesh.h,v 1.3 2007/03/19 19:24:37 adamdunkels Exp $
+ * $Id: mesh.h,v 1.4 2007/03/19 22:10:17 adamdunkels Exp $
  */
 
 /**
@@ -54,4 +54,6 @@ int mesh_send(rimeaddr_t *dest);
 
 void mesh_data_received(rimeaddr_t *from);
 
+void mesh_close(void);
+
 #endif /* __MESH_H__ */
diff --git a/core/net/rime/nf.c b/core/net/rime/nf.c
index bbfb20a37..ee6eeb871 100644
--- a/core/net/rime/nf.c
+++ b/core/net/rime/nf.c
@@ -28,7 +28,7 @@
  *
  * This file is part of the Contiki operating system.
  *
- * $Id: nf.c,v 1.5 2007/03/19 19:24:37 adamdunkels Exp $
+ * $Id: nf.c,v 1.6 2007/03/19 22:10:17 adamdunkels Exp $
  */
 
 /**
@@ -157,6 +157,12 @@ nf_open(struct nf_conn *c, u16_t channel,
   c->u = u;
 }
 /*---------------------------------------------------------------------------*/
+void
+nf_close(struct nf_conn *c)
+{
+  ibc_close(&c->c);
+}
+/*---------------------------------------------------------------------------*/
 int
 nf_send(struct nf_conn *c)
 {
diff --git a/core/net/rime/nf.h b/core/net/rime/nf.h
index e09fe7081..bed3d0c63 100644
--- a/core/net/rime/nf.h
+++ b/core/net/rime/nf.h
@@ -28,7 +28,7 @@
  *
  * This file is part of the Contiki operating system.
  *
- * $Id: nf.h,v 1.5 2007/03/19 19:24:37 adamdunkels Exp $
+ * $Id: nf.h,v 1.6 2007/03/19 22:10:17 adamdunkels Exp $
  */
 
 /**
@@ -65,6 +65,7 @@ struct nf_conn {
 
 void nf_open(struct nf_conn *c, u16_t channel,
 	      const struct nf_callbacks *u);
+void nf_close(struct nf_conn *c);
 
 int nf_send(struct nf_conn *c);
 
diff --git a/core/net/rime/ruc.c b/core/net/rime/ruc.c
index faff70b4c..e5b00b3f2 100644
--- a/core/net/rime/ruc.c
+++ b/core/net/rime/ruc.c
@@ -28,7 +28,7 @@
  *
  * This file is part of the Contiki operating system.
  *
- * $Id: ruc.c,v 1.4 2007/03/19 19:24:37 adamdunkels Exp $
+ * $Id: ruc.c,v 1.5 2007/03/19 22:10:17 adamdunkels Exp $
  */
 
 /**
@@ -120,6 +120,12 @@ ruc_open(struct ruc_conn *c, u16_t channel,
   c->u = u;
 }
 /*---------------------------------------------------------------------------*/
+void
+ruc_close(struct ruc_conn *c)
+{
+  suc_close(&c->c);
+}
+/*---------------------------------------------------------------------------*/
 int
 ruc_send(struct ruc_conn *c, rimeaddr_t *receiver)
 {
diff --git a/core/net/rime/ruc.h b/core/net/rime/ruc.h
index 959a77a8e..737c7abfd 100644
--- a/core/net/rime/ruc.h
+++ b/core/net/rime/ruc.h
@@ -28,7 +28,7 @@
  *
  * This file is part of the Contiki operating system.
  *
- * $Id: ruc.h,v 1.4 2007/03/19 19:24:37 adamdunkels Exp $
+ * $Id: ruc.h,v 1.5 2007/03/19 22:10:17 adamdunkels Exp $
  */
 
 /**
@@ -58,6 +58,7 @@ struct ruc_conn {
 
 void ruc_open(struct ruc_conn *c, u16_t channel,
 	       const struct ruc_callbacks *u);
+void ruc_close(struct ruc_conn *c);
 
 int ruc_send(struct ruc_conn *c, rimeaddr_t *receiver);
 
diff --git a/core/net/rime/sabc.c b/core/net/rime/sabc.c
index f99306216..63fb233e1 100644
--- a/core/net/rime/sabc.c
+++ b/core/net/rime/sabc.c
@@ -28,7 +28,7 @@
  *
  * This file is part of the Contiki operating system.
  *
- * $Id: sabc.c,v 1.3 2007/03/19 19:24:37 adamdunkels Exp $
+ * $Id: sabc.c,v 1.4 2007/03/19 22:10:17 adamdunkels Exp $
  */
 
 /**
@@ -64,6 +64,13 @@ sabc_open(struct sabc_conn *c, u16_t channel,
   c->u = u;
 }
 /*---------------------------------------------------------------------------*/
+void
+sabc_close(struct sabc_conn *c)
+{
+  abc_close(&c->c);
+  ctimer_setop(&c->t);
+}
+/*---------------------------------------------------------------------------*/
 static void
 send(void *ptr)
 {
diff --git a/core/net/rime/sabc.h b/core/net/rime/sabc.h
index d05c14d82..9fee305ba 100644
--- a/core/net/rime/sabc.h
+++ b/core/net/rime/sabc.h
@@ -44,7 +44,7 @@
  *
  * This file is part of the Contiki operating system.
  *
- * $Id: sabc.h,v 1.3 2007/03/19 19:24:37 adamdunkels Exp $
+ * $Id: sabc.h,v 1.4 2007/03/19 22:10:17 adamdunkels Exp $
  */
 
 /**
@@ -98,7 +98,7 @@ struct sabc_conn {
  */
 void sabc_open(struct sabc_conn *c, u16_t channel,
 		const struct sabc_callbacks *u);
-
+void sabc_close(struct sabc_conn *c);
 
 /**
  * \brief      Send a stubborn message.
diff --git a/core/net/rime/sibc.c b/core/net/rime/sibc.c
index 3229da3ae..d3f818a98 100644
--- a/core/net/rime/sibc.c
+++ b/core/net/rime/sibc.c
@@ -28,7 +28,7 @@
  *
  * This file is part of the Contiki operating system.
  *
- * $Id: sibc.c,v 1.4 2007/03/19 19:24:37 adamdunkels Exp $
+ * $Id: sibc.c,v 1.5 2007/03/19 22:10:17 adamdunkels Exp $
  */
 
 /**
@@ -63,6 +63,13 @@ sibc_open(struct sibc_conn *c, u16_t channel,
   c->u = u;
 }
 /*---------------------------------------------------------------------------*/
+void
+sibc_close(struct sibc_conn *c)
+{
+  ibc_close(&c->c);
+  ctimer_stop(&c->t);
+}
+/*---------------------------------------------------------------------------*/
 static void
 send(void *ptr)
 {
diff --git a/core/net/rime/sibc.h b/core/net/rime/sibc.h
index 270e1c239..de0116b10 100644
--- a/core/net/rime/sibc.h
+++ b/core/net/rime/sibc.h
@@ -28,7 +28,7 @@
  *
  * This file is part of the Contiki operating system.
  *
- * $Id: sibc.h,v 1.4 2007/03/19 19:24:37 adamdunkels Exp $
+ * $Id: sibc.h,v 1.5 2007/03/19 22:10:17 adamdunkels Exp $
  */
 
 /**
@@ -61,6 +61,7 @@ struct sibc_conn {
 
 void sibc_open(struct sibc_conn *c, u16_t channel,
 		const struct sibc_callbacks *u);
+void sibc_close(struct sibc_conn *c);
 
 int sibc_send_stubborn(struct sibc_conn *c, clock_time_t t);
 void sibc_cancel(struct sibc_conn *c);
diff --git a/core/net/rime/suc.c b/core/net/rime/suc.c
index 15b6e7bcc..f31632f7f 100644
--- a/core/net/rime/suc.c
+++ b/core/net/rime/suc.c
@@ -28,7 +28,7 @@
  *
  * This file is part of the Contiki operating system.
  *
- * $Id: suc.c,v 1.4 2007/03/19 19:24:37 adamdunkels Exp $
+ * $Id: suc.c,v 1.5 2007/03/19 22:10:17 adamdunkels Exp $
  */
 
 /**
@@ -63,6 +63,13 @@ suc_open(struct suc_conn *c, u16_t channel,
   c->u = u;
 }
 /*---------------------------------------------------------------------------*/
+void
+suc_close(struct suc_conn *c)
+{
+  uc_close(&c->c);
+  ctimer_stop(&c->t);
+}
+/*---------------------------------------------------------------------------*/
 static void
 send(void *ptr)
 {
diff --git a/core/net/rime/suc.h b/core/net/rime/suc.h
index eabf068fd..90ece4c69 100644
--- a/core/net/rime/suc.h
+++ b/core/net/rime/suc.h
@@ -28,7 +28,7 @@
  *
  * This file is part of the Contiki operating system.
  *
- * $Id: suc.h,v 1.4 2007/03/19 19:24:37 adamdunkels Exp $
+ * $Id: suc.h,v 1.5 2007/03/19 22:10:17 adamdunkels Exp $
  */
 
 /**
@@ -62,6 +62,7 @@ struct suc_conn {
 
 void suc_open(struct suc_conn *c, u16_t channel,
 	       const struct suc_callbacks *u);
+void suc_close(struct suc_conn *c);
 
 int suc_send_stubborn(struct suc_conn *c, rimeaddr_t *receiver);
 void suc_cancel(struct suc_conn *c);
diff --git a/core/net/rime/tree.c b/core/net/rime/tree.c
index 006fbc8ad..5f5bb2427 100644
--- a/core/net/rime/tree.c
+++ b/core/net/rime/tree.c
@@ -28,7 +28,7 @@
  *
  * This file is part of the Contiki operating system.
  *
- * $Id: tree.c,v 1.3 2007/03/19 19:24:37 adamdunkels Exp $
+ * $Id: tree.c,v 1.4 2007/03/19 22:10:17 adamdunkels Exp $
  */
 
 /**
@@ -193,6 +193,13 @@ tree_open(const struct tree_callbacks *cb)
 }
 /*---------------------------------------------------------------------------*/
 void
+tree_close(void)
+{
+  sibc_close(&sibc_conn);
+  ruc_close(&ruc_conn);
+}
+/*---------------------------------------------------------------------------*/
+void
 tree_set_sink(int should_be_sink)
 {
   if(should_be_sink) {
diff --git a/core/net/rime/tree.h b/core/net/rime/tree.h
index 7338cd4b1..3a4a5afdb 100644
--- a/core/net/rime/tree.h
+++ b/core/net/rime/tree.h
@@ -28,7 +28,7 @@
  *
  * This file is part of the Contiki operating system.
  *
- * $Id: tree.h,v 1.2 2007/03/19 19:24:37 adamdunkels Exp $
+ * $Id: tree.h,v 1.3 2007/03/19 22:10:17 adamdunkels Exp $
  */
 
 /**
@@ -47,6 +47,7 @@ struct tree_callbacks {
 };
 
 void tree_open(const struct tree_callbacks *callbacks);
+void tree_close(void);
 
 void tree_send(void);
 
diff --git a/core/net/rime/uc.c b/core/net/rime/uc.c
index b06cdfbed..2d7634bd5 100644
--- a/core/net/rime/uc.c
+++ b/core/net/rime/uc.c
@@ -28,7 +28,7 @@
  *
  * This file is part of the Contiki operating system.
  *
- * $Id: uc.c,v 1.4 2007/03/19 19:24:37 adamdunkels Exp $
+ * $Id: uc.c,v 1.5 2007/03/19 22:10:17 adamdunkels Exp $
  */
 
 /**
@@ -70,6 +70,12 @@ uc_open(struct uc_conn *c, u16_t channel,
   c->u = u;
 }
 /*---------------------------------------------------------------------------*/
+void
+uc_close(struct uc_conn *c)
+{
+  ibc_close(&c->c);
+}
+/*---------------------------------------------------------------------------*/
 int
 uc_send(struct uc_conn *c, rimeaddr_t *receiver)
 {
diff --git a/core/net/rime/uc.h b/core/net/rime/uc.h
index ede96a8d8..1d52338b4 100644
--- a/core/net/rime/uc.h
+++ b/core/net/rime/uc.h
@@ -28,7 +28,7 @@
  *
  * This file is part of the Contiki operating system.
  *
- * $Id: uc.h,v 1.4 2007/03/19 19:24:37 adamdunkels Exp $
+ * $Id: uc.h,v 1.5 2007/03/19 22:10:17 adamdunkels Exp $
  */
 
 /**
@@ -56,6 +56,8 @@ struct uc_conn {
 
 void uc_open(struct uc_conn *c, u16_t channel,
 	      const struct uc_callbacks *u);
+void uc_close(struct uc_conn *c);
+
 int uc_send(struct uc_conn *c, rimeaddr_t *receiver);
 
 #endif /* __UC_H__ */