diff --git a/examples/libs/ipv6-uipbuf/Makefile b/examples/libs/ipv6-uipbuf/Makefile
new file mode 100644
index 000000000..b7500284e
--- /dev/null
+++ b/examples/libs/ipv6-uipbuf/Makefile
@@ -0,0 +1,5 @@
+CONTIKI_PROJECT = udp-client udp-server
+all: $(CONTIKI_PROJECT)
+
+CONTIKI=../../..
+include $(CONTIKI)/Makefile.include
diff --git a/examples/libs/ipv6-uipbuf/README.md b/examples/libs/ipv6-uipbuf/README.md
new file mode 100644
index 000000000..6f028202e
--- /dev/null
+++ b/examples/libs/ipv6-uipbuf/README.md
@@ -0,0 +1,5 @@
+This example is meant to showcase the capabilities of uipbuf. It currently
+focuses only on UIPBUF_ATTR_MAX_MAC_TRANSMISSIONS, which lets an application
+set a custom max number of MAC transmissions. Optionally, this information
+can be passed on over multiple hops, so that the attribute applies along
+the full path. This requires setting UIP_CONF_TAG_TC_WITH_VARIABLE_RETRANSMISSIONS.
diff --git a/examples/libs/ipv6-uipbuf/ipv6-uipbuf-cooja.csc b/examples/libs/ipv6-uipbuf/ipv6-uipbuf-cooja.csc
new file mode 100644
index 000000000..71adabb74
--- /dev/null
+++ b/examples/libs/ipv6-uipbuf/ipv6-uipbuf-cooja.csc
@@ -0,0 +1,180 @@
+
+
+ [APPS_DIR]/mrm
+ [APPS_DIR]/mspsim
+ [APPS_DIR]/avrora
+ [APPS_DIR]/serial_socket
+ [APPS_DIR]/powertracker
+
+ IPv6 uipbuf Example
+ 123456
+ 1000000
+
+ org.contikios.cooja.radiomediums.UDGM
+ 50.0
+ 100.0
+ 1.0
+ 1.0
+
+
+ 40000
+
+
+ org.contikios.cooja.contikimote.ContikiMoteType
+ mtype829
+ Cooja Mote Type #1
+ [CONTIKI_DIR]/examples/libs/ipv6-uipbuf/udp-server.c
+ make udp-server.cooja TARGET=cooja
+ org.contikios.cooja.interfaces.Position
+ org.contikios.cooja.interfaces.Battery
+ org.contikios.cooja.contikimote.interfaces.ContikiVib
+ org.contikios.cooja.contikimote.interfaces.ContikiMoteID
+ org.contikios.cooja.contikimote.interfaces.ContikiRS232
+ org.contikios.cooja.contikimote.interfaces.ContikiBeeper
+ org.contikios.cooja.interfaces.RimeAddress
+ org.contikios.cooja.contikimote.interfaces.ContikiIPAddress
+ org.contikios.cooja.contikimote.interfaces.ContikiRadio
+ org.contikios.cooja.contikimote.interfaces.ContikiButton
+ org.contikios.cooja.contikimote.interfaces.ContikiPIR
+ org.contikios.cooja.contikimote.interfaces.ContikiClock
+ org.contikios.cooja.contikimote.interfaces.ContikiLED
+ org.contikios.cooja.contikimote.interfaces.ContikiCFS
+ org.contikios.cooja.contikimote.interfaces.ContikiEEPROM
+ org.contikios.cooja.interfaces.Mote2MoteRelations
+ org.contikios.cooja.interfaces.MoteAttributes
+ false
+
+
+ org.contikios.cooja.contikimote.ContikiMoteType
+ mtype405
+ Cooja Mote Type #2
+ [CONTIKI_DIR]/examples/libs/ipv6-uipbuf/udp-client.c
+ make udp-client.cooja TARGET=cooja
+ org.contikios.cooja.interfaces.Position
+ org.contikios.cooja.interfaces.Battery
+ org.contikios.cooja.contikimote.interfaces.ContikiVib
+ org.contikios.cooja.contikimote.interfaces.ContikiMoteID
+ org.contikios.cooja.contikimote.interfaces.ContikiRS232
+ org.contikios.cooja.contikimote.interfaces.ContikiBeeper
+ org.contikios.cooja.interfaces.RimeAddress
+ org.contikios.cooja.contikimote.interfaces.ContikiIPAddress
+ org.contikios.cooja.contikimote.interfaces.ContikiRadio
+ org.contikios.cooja.contikimote.interfaces.ContikiButton
+ org.contikios.cooja.contikimote.interfaces.ContikiPIR
+ org.contikios.cooja.contikimote.interfaces.ContikiClock
+ org.contikios.cooja.contikimote.interfaces.ContikiLED
+ org.contikios.cooja.contikimote.interfaces.ContikiCFS
+ org.contikios.cooja.contikimote.interfaces.ContikiEEPROM
+ org.contikios.cooja.interfaces.Mote2MoteRelations
+ org.contikios.cooja.interfaces.MoteAttributes
+ false
+
+
+
+ org.contikios.cooja.interfaces.Position
+ 43.291897546941804
+ 7.17470867058031
+ 0.0
+
+
+ org.contikios.cooja.contikimote.interfaces.ContikiMoteID
+ 1
+
+
+ org.contikios.cooja.contikimote.interfaces.ContikiRadio
+ 250.0
+
+
+ org.contikios.cooja.contikimote.interfaces.ContikiEEPROM
+ AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA==
+
+ mtype829
+
+
+
+ org.contikios.cooja.interfaces.Position
+ 41.0074953544532
+ 42.15996473110367
+ 0.0
+
+
+ org.contikios.cooja.contikimote.interfaces.ContikiMoteID
+ 2
+
+
+ org.contikios.cooja.contikimote.interfaces.ContikiRadio
+ 250.0
+
+
+ org.contikios.cooja.contikimote.interfaces.ContikiEEPROM
+ AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA==
+
+ mtype405
+
+
+
+ org.contikios.cooja.plugins.SimControl
+ 229
+ 3
+ 157
+ 11
+ 6
+
+
+ org.contikios.cooja.plugins.Visualizer
+
+ true
+ org.contikios.cooja.plugins.skins.IDVisualizerSkin
+ org.contikios.cooja.plugins.skins.UDGMVisualizerSkin
+ 1.1719333465234514 0.0 0.0 1.1719333465234514 -4.934308660658031 20.209777273580123
+
+ 234
+ 1
+ 257
+ 10
+ 170
+
+
+ org.contikios.cooja.plugins.LogListener
+
+ App
+
+
+
+ 1074
+ 0
+ 713
+ 844
+ 3
+
+
+ org.contikios.cooja.plugins.TimeLine
+
+ 0
+ 1
+
+
+
+ 140.4158108891898
+
+ 1920
+ 2
+ 384
+ 1
+ 716
+
+
+ org.contikios.cooja.plugins.RadioLogger
+
+ 407
+
+ false
+ false
+
+ 595
+ 4
+ 706
+ 245
+ 4
+
+
diff --git a/examples/libs/ipv6-uipbuf/ipv6-uipbuf-sky.csc b/examples/libs/ipv6-uipbuf/ipv6-uipbuf-sky.csc
new file mode 100644
index 000000000..30fc54e14
--- /dev/null
+++ b/examples/libs/ipv6-uipbuf/ipv6-uipbuf-sky.csc
@@ -0,0 +1,170 @@
+
+
+ [APPS_DIR]/mrm
+ [APPS_DIR]/mspsim
+ [APPS_DIR]/avrora
+ [APPS_DIR]/serial_socket
+ [APPS_DIR]/powertracker
+
+ IPv6 uipbuf Example
+ generated
+ 5000000
+
+ org.contikios.cooja.radiomediums.UDGM
+ 50.0
+ 50.0
+ 1.0
+ 1.0
+
+
+ 40000
+
+
+ org.contikios.cooja.mspmote.SkyMoteType
+ sky1
+ Sky Mote Type #sky1
+ [CONTIKI_DIR]/examples/libs/ipv6-uipbuf/udp-server.c
+ make udp-server.sky TARGET=sky
+ [CONTIKI_DIR]/examples/libs/ipv6-uipbuf/udp-server.sky
+ org.contikios.cooja.interfaces.Position
+ org.contikios.cooja.interfaces.RimeAddress
+ org.contikios.cooja.interfaces.IPAddress
+ org.contikios.cooja.interfaces.Mote2MoteRelations
+ org.contikios.cooja.interfaces.MoteAttributes
+ org.contikios.cooja.mspmote.interfaces.MspClock
+ org.contikios.cooja.mspmote.interfaces.MspMoteID
+ org.contikios.cooja.mspmote.interfaces.SkyButton
+ org.contikios.cooja.mspmote.interfaces.SkyFlash
+ org.contikios.cooja.mspmote.interfaces.SkyCoffeeFilesystem
+ org.contikios.cooja.mspmote.interfaces.Msp802154Radio
+ org.contikios.cooja.mspmote.interfaces.MspSerial
+ org.contikios.cooja.mspmote.interfaces.SkyLED
+ org.contikios.cooja.mspmote.interfaces.MspDebugOutput
+ org.contikios.cooja.mspmote.interfaces.SkyTemperature
+
+
+ org.contikios.cooja.mspmote.SkyMoteType
+ sky2
+ Sky Mote Type #sky2
+ [CONTIKI_DIR]/examples/libs/ipv6-uipbuf/udp-client.c
+ make udp-client.sky TARGET=sky
+ [CONTIKI_DIR]/examples/libs/ipv6-uipbuf/udp-client.sky
+ org.contikios.cooja.interfaces.Position
+ org.contikios.cooja.interfaces.RimeAddress
+ org.contikios.cooja.interfaces.IPAddress
+ org.contikios.cooja.interfaces.Mote2MoteRelations
+ org.contikios.cooja.interfaces.MoteAttributes
+ org.contikios.cooja.mspmote.interfaces.MspClock
+ org.contikios.cooja.mspmote.interfaces.MspMoteID
+ org.contikios.cooja.mspmote.interfaces.SkyButton
+ org.contikios.cooja.mspmote.interfaces.SkyFlash
+ org.contikios.cooja.mspmote.interfaces.SkyCoffeeFilesystem
+ org.contikios.cooja.mspmote.interfaces.Msp802154Radio
+ org.contikios.cooja.mspmote.interfaces.MspSerial
+ org.contikios.cooja.mspmote.interfaces.SkyLED
+ org.contikios.cooja.mspmote.interfaces.MspDebugOutput
+ org.contikios.cooja.mspmote.interfaces.SkyTemperature
+
+
+
+
+ org.contikios.cooja.interfaces.Position
+ 30.051578821079996
+ -64.69428746901113
+ 0.0
+
+
+ org.contikios.cooja.mspmote.interfaces.MspClock
+ 1.0
+
+
+ org.contikios.cooja.mspmote.interfaces.MspMoteID
+ 1
+
+ sky1
+
+
+
+
+ org.contikios.cooja.interfaces.Position
+ 21.31366587648077
+ -34.91404431659299
+ 0.0
+
+
+ org.contikios.cooja.mspmote.interfaces.MspClock
+ 1.0
+
+
+ org.contikios.cooja.mspmote.interfaces.MspMoteID
+ 2
+
+ sky2
+
+
+
+ org.contikios.cooja.plugins.SimControl
+ 249
+ 4
+ 184
+ 3
+ 15
+
+
+ org.contikios.cooja.plugins.Visualizer
+
+ org.contikios.cooja.plugins.skins.IDVisualizerSkin
+ org.contikios.cooja.plugins.skins.UDGMVisualizerSkin
+ org.contikios.cooja.plugins.skins.AttributeVisualizerSkin
+ 1.3598488697820064 0.0 0.0 1.3598488697820064 6.142207908179105 118.20877091196155
+
+ 234
+ 1
+ 227
+ 14
+ 210
+
+
+ org.contikios.cooja.plugins.LogListener
+
+
+
+
+
+ 1011
+ 0
+ 556
+ 759
+ 7
+
+
+ org.contikios.cooja.plugins.TimeLine
+
+ 0
+ 1
+
+
+
+ 681.712557066089
+
+ 1804
+ 3
+ 352
+ 0
+ 567
+
+
+ org.contikios.cooja.plugins.RadioLogger
+
+ 150
+
+ false
+ false
+
+ 500
+ 2
+ 546
+ 259
+ 12
+
+
diff --git a/examples/libs/ipv6-uipbuf/project-conf.h b/examples/libs/ipv6-uipbuf/project-conf.h
new file mode 100644
index 000000000..dfbf0d329
--- /dev/null
+++ b/examples/libs/ipv6-uipbuf/project-conf.h
@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2018, RISE SICS.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holder nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef PROJECT_CONF_H_
+#define PROJECT_CONF_H_
+
+/* Include max MAC Tx in the IPv6 Traffic Class field */
+#define UIP_CONF_TAG_TC_WITH_VARIABLE_RETRANSMISSIONS 1
+
+#endif /* PROJECT_CONF_H_ */
diff --git a/examples/libs/ipv6-uipbuf/udp-client.c b/examples/libs/ipv6-uipbuf/udp-client.c
new file mode 100644
index 000000000..bee1cda83
--- /dev/null
+++ b/examples/libs/ipv6-uipbuf/udp-client.c
@@ -0,0 +1,85 @@
+#include "contiki.h"
+#include "net/routing/routing.h"
+#include "random.h"
+#include "net/netstack.h"
+#include "net/ipv6/simple-udp.h"
+
+#include "sys/log.h"
+#define LOG_MODULE "App"
+#define LOG_LEVEL LOG_LEVEL_INFO
+
+#define WITH_SERVER_REPLY 1
+#define UDP_CLIENT_PORT 8765
+#define UDP_SERVER_PORT 5678
+
+static struct simple_udp_connection udp_conn;
+
+#define START_INTERVAL (15 * CLOCK_SECOND)
+#define SEND_INTERVAL (60 * CLOCK_SECOND)
+
+static struct simple_udp_connection udp_conn;
+
+/*---------------------------------------------------------------------------*/
+PROCESS(udp_client_process, "UDP client");
+AUTOSTART_PROCESSES(&udp_client_process);
+/*---------------------------------------------------------------------------*/
+static void
+udp_rx_callback(struct simple_udp_connection *c,
+ const uip_ipaddr_t *sender_addr,
+ uint16_t sender_port,
+ const uip_ipaddr_t *receiver_addr,
+ uint16_t receiver_port,
+ const uint8_t *data,
+ uint16_t datalen)
+{
+ unsigned count = *(unsigned *)data;
+ /* If tagging of traffic class is enabled tc will print number of
+ transmission - otherwise it will be 0 */
+ LOG_INFO("Received response %u (Max MAC Tx: %d) from ", count,
+ uipbuf_get_attr(UIPBUF_ATTR_MAX_MAC_TRANSMISSIONS));
+ LOG_INFO_6ADDR(sender_addr);
+ LOG_INFO_("\n");
+}
+/*---------------------------------------------------------------------------*/
+PROCESS_THREAD(udp_client_process, ev, data)
+{
+ static struct etimer periodic_timer;
+ static unsigned count;
+ uip_ipaddr_t dest_ipaddr;
+
+ PROCESS_BEGIN();
+
+ /* Initialize UDP connection */
+ simple_udp_register(&udp_conn, UDP_CLIENT_PORT, NULL,
+ UDP_SERVER_PORT, udp_rx_callback);
+
+ etimer_set(&periodic_timer, random_rand() % SEND_INTERVAL);
+ while(1) {
+ PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&periodic_timer));
+
+ if(NETSTACK_ROUTING.node_is_reachable() && NETSTACK_ROUTING.get_root_ipaddr(&dest_ipaddr)) {
+ /* Set the number of transmissions to use for this packet -
+ this can be used to create more reliable transmissions or
+ less reliable than the default. Works end-to-end if
+ UIP_CONF_TAG_TC_WITH_VARIABLE_RETRANSMISSIONS is set to 1.
+ */
+ uipbuf_set_attr(UIPBUF_ATTR_MAX_MAC_TRANSMISSIONS, 1 + count % 5);
+ /* Send to DAG root */
+ LOG_INFO("Sending request %u (Max MAC Tx: %d) to ", count,
+ uipbuf_get_attr(UIPBUF_ATTR_MAX_MAC_TRANSMISSIONS));
+ LOG_INFO_6ADDR(&dest_ipaddr);
+ LOG_INFO_("\n");
+ simple_udp_sendto(&udp_conn, &count, sizeof(count), &dest_ipaddr);
+ count++;
+ } else {
+ LOG_INFO("Not reachable yet\n");
+ }
+
+ /* Add some jitter */
+ etimer_set(&periodic_timer, SEND_INTERVAL
+ - CLOCK_SECOND + (random_rand() % (2 * CLOCK_SECOND)));
+ }
+
+ PROCESS_END();
+}
+/*---------------------------------------------------------------------------*/
diff --git a/examples/libs/ipv6-uipbuf/udp-server.c b/examples/libs/ipv6-uipbuf/udp-server.c
new file mode 100644
index 000000000..288a0cba9
--- /dev/null
+++ b/examples/libs/ipv6-uipbuf/udp-server.c
@@ -0,0 +1,84 @@
+/*
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the Institute nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * This file is part of the Contiki operating system.
+ *
+ */
+
+#include "contiki.h"
+#include "net/routing/routing.h"
+#include "net/netstack.h"
+#include "net/ipv6/simple-udp.h"
+
+#include "sys/log.h"
+#define LOG_MODULE "App"
+#define LOG_LEVEL LOG_LEVEL_INFO
+
+#define WITH_SERVER_REPLY 1
+#define UDP_CLIENT_PORT 8765
+#define UDP_SERVER_PORT 5678
+
+static struct simple_udp_connection udp_conn;
+
+PROCESS(udp_server_process, "UDP server");
+AUTOSTART_PROCESSES(&udp_server_process);
+/*---------------------------------------------------------------------------*/
+static void
+udp_rx_callback(struct simple_udp_connection *c,
+ const uip_ipaddr_t *sender_addr,
+ uint16_t sender_port,
+ const uip_ipaddr_t *receiver_addr,
+ uint16_t receiver_port,
+ const uint8_t *data,
+ uint16_t datalen)
+{
+ unsigned count = *(unsigned *)data;
+ LOG_INFO("Received request %u (Max MAC Tx: %d) from ", count,
+ uipbuf_get_attr(UIPBUF_ATTR_MAX_MAC_TRANSMISSIONS));
+ LOG_INFO_6ADDR(sender_addr);
+ LOG_INFO_("\n");
+#if WITH_SERVER_REPLY
+ LOG_INFO("Sending response %u (Max MAC Tx: %d) to ", count,
+ uipbuf_get_attr(UIPBUF_ATTR_MAX_MAC_TRANSMISSIONS));
+ LOG_INFO_6ADDR(sender_addr);
+ LOG_INFO_("\n");
+ simple_udp_sendto(&udp_conn, &count, sizeof(count), sender_addr);
+#endif /* WITH_SERVER_REPLY */
+}
+/*---------------------------------------------------------------------------*/
+PROCESS_THREAD(udp_server_process, ev, data)
+{
+ PROCESS_BEGIN();
+
+ /* Initialize DAG root */
+ NETSTACK_ROUTING.root_start();
+
+ /* Initialize UDP connection */
+ simple_udp_register(&udp_conn, UDP_SERVER_PORT, NULL,
+ UDP_CLIENT_PORT, udp_rx_callback);
+
+ PROCESS_END();
+}
+/*---------------------------------------------------------------------------*/