Merge pull request #2 from iot-lab/pr/er-coap-dtls/tinydtls_and_er_coap_integration

Pr/er coap dtls/tinydtls and er coap integration

.gitmodules

@@ -10,7 +10,9 @@
 [submodule "platform/stm32nucleo-spirit1/stm32cube-lib"]
 	path = platform/stm32nucleo-spirit1/stm32cube-lib
 	url = https://github.com/STclab/stm32nucleo-spirit1-lib
-
 [submodule "tools/sensniff"]
 	path = tools/sensniff
 	url = https://github.com/g-oikonomou/sensniff.git
+[submodule "apps/tinydtls"]
+	path = apps/tinydtls
+	url = https://github.com/iot-lab/armour-tinydtls.git

apps/er-coap/Makefile.er-coap

@@ -4,3 +4,18 @@ er-coap_src = er-coap.c er-coap-engine.c er-coap-transactions.c      \
 
 # Erbium will implement the REST Engine
 CFLAGS += -DREST=coap_rest_implementation
+
+ifeq ($(WITH_DTLS_COAP),1)
+er-coap_src += er-coap-dtls.c
+
+# Load tinydtls
+APPS += tinydtls
+$(CONTIKI)/apps/tinydtls/Makefile.tinydtls:
+	@echo "    You should run 'git submodule update --init' to clone 'app/tinydtls'"
+	@exit 1
+include $(CONTIKI)/apps/tinydtls/Makefile.tinydtls
+PROJECTDIRS+=$(CONTIKI)/apps/tinydtls/aes $(CONTIKI)/apps/tinydtls/sha2 $(CONTIKI)/apps/tinydtls/ecc
+
+else
+er-coap_src += er-coap-udp.c
+endif

apps/er-coap/er-coap-communication.h

@@ -0,0 +1,15 @@
+#ifndef _ER_COAP_COMMUNICATION_H_
+#define _ER_COAP_COMMUNICATION_H_
+
+#include "contiki.h"
+
+void
+coap_init_communication_layer(uint16_t port);
+
+void
+coap_send_message(uip_ipaddr_t *addr, uint16_t port, uint8_t *data, uint16_t length);
+
+void
+coap_handle_receive(void);
+
+#endif

apps/er-coap/er-coap-dtls.c

@@ -0,0 +1,161 @@
+#include "contiki.h"
+#include "contiki-net.h"
+#include "er-coap.h"
+#include "er-coap-engine.h"
+
+#include "dtls.h"
+
+#include <string.h>
+
+#define DEBUG DEBUG_NONE
+#include "dtls_debug.h"
+
+/*---------------------------------------------------------------------------*/
+
+/*---------------------------------------------------------------------------*/
+
+static struct dtls_context_t *dtls_ctx = NULL;
+
+static dtls_handler_t coap_dtls_callback = {
+  .write = coap_dtls_send_to_peer,
+  .read = coap_dtls_read_from_peer,
+  .event = NULL,
+#ifdef DTLS_PSK
+  .get_psk_info = coap_dtls_get_psk_info,
+#endif
+#ifdef DTLS_ECC
+  .get_ecdsa_key = NULL,
+  .verify_ecdsa_key = NULL,
+#endif
+};
+
+/*-----------------------------------------------------------------------------------*/
+void
+coap_init_communication_layer(uint16_t port)
+{
+  struct uip_udp_conn *udp_conn = NULL;
+
+  dtls_init();
+  dtls_set_log_level(DTLS_LOG_DEBUG);
+
+  udp_conn = udp_new(NULL, 0, NULL);
+  udp_bind(udp_conn, port);
+
+  dtls_ctx = dtls_new_context(udp_conn);
+  if(dtls_ctx) {
+    dtls_set_handler(dtls_ctx, &COAP_DTLS_CALLBACK);
+  }
+  /* new connection with remote host */
+  printf("COAP-DTLS listening on port %u\n", uip_ntohs(udp_conn->lport));
+}
+/*-----------------------------------------------------------------------------------*/
+void
+coap_send_message(uip_ipaddr_t *addr, uint16_t port,
+                  uint8_t *data, uint16_t length)
+{
+  session_t session;
+
+  dtls_session_init(&session);
+  uip_ipaddr_copy(&session.addr, addr);
+  session.port = port;
+
+  dtls_write(dtls_ctx, &session, data, length);
+}
+/*-----------------------------------------------------------------------------------*/
+void
+coap_handle_receive()
+{
+  session_t session;
+
+  if(uip_newdata()) {
+    dtls_session_init(&session);
+    uip_ipaddr_copy(&session.addr, &UIP_IP_BUF->srcipaddr);
+    session.port = UIP_UDP_BUF->srcport;
+
+    dtls_handle_message(dtls_ctx, &session, uip_appdata, uip_datalen());
+  }
+}
+/* DTLS Specific functions */
+/*-----------------------------------------------------------------------------------*/
+#ifdef DTLS_PSK
+/* This function is the "key store" for tinyDTLS. It is called to
+ * retrieve a key for the given identiy within this particular
+ * session. */
+int
+coap_dtls_get_psk_info(struct dtls_context_t *ctx, const session_t *session,
+                       dtls_credentials_type_t type,
+                       const unsigned char *id, size_t id_len,
+                       unsigned char *result, size_t result_length)
+{
+
+  struct keymap_t {
+    unsigned char *id;
+    size_t id_length;
+    unsigned char *key;
+    size_t key_length;
+  } psk[1] = {
+    { (unsigned char *)DTLS_IDENTITY, DTLS_IDENTITY_LENGTH, (unsigned char *)DTLS_PSK_KEY_VALUE, DTLS_PSK_KEY_VALUE_LENGTH },
+  };
+  if(type == DTLS_PSK_IDENTITY) {
+    if(id_len) {
+      dtls_debug("got psk_identity_hint: '%.*s'\n", id_len, id);
+    }
+
+    if(result_length < psk[0].id_length) {
+      dtls_warn("cannot set psk_identity -- buffer too small\n");
+      return dtls_alert_fatal_create(DTLS_ALERT_INTERNAL_ERROR);
+    }
+
+    memcpy(result, psk[0].id, psk[0].id_length);
+    return psk[0].id_length;
+  } else if(type == DTLS_PSK_KEY) {
+    if(id) {
+      int i;
+      for(i = 0; i < sizeof(psk) / sizeof(struct keymap_t); i++) {
+        if(id_len == psk[i].id_length && memcmp(id, psk[i].id, id_len) == 0) {
+          if(result_length < psk[i].key_length) {
+            dtls_warn("buffer too small for PSK");
+            return dtls_alert_fatal_create(DTLS_ALERT_INTERNAL_ERROR);
+          }
+
+          memcpy(result, psk[i].key, psk[i].key_length);
+          return psk[i].key_length;
+        }
+      }
+    }
+  } else {
+    return 0;
+  }
+
+  return dtls_alert_fatal_create(DTLS_ALERT_DECRYPT_ERROR);
+}
+#endif
+/*-----------------------------------------------------------------------------------*/
+int
+coap_dtls_send_to_peer(struct dtls_context_t *ctx,
+                       session_t *session, uint8 *data, size_t len)
+{
+
+  struct uip_udp_conn *conn = (struct uip_udp_conn *)dtls_get_app_data(ctx);
+
+  uip_ipaddr_copy(&conn->ripaddr, &session->addr);
+  conn->rport = session->port;
+
+  uip_udp_packet_send(conn, data, len);
+
+  /* Restore server connection to allow data from any node */
+  memset(&conn->ripaddr, 0, sizeof(conn->ripaddr));
+  memset(&conn->rport, 0, sizeof(conn->rport));
+
+  return len;
+}
+/*-----------------------------------------------------------------------------------*/
+int
+coap_dtls_read_from_peer(struct dtls_context_t *ctx,
+                         session_t *session, uint8 *data, size_t len)
+{
+  uip_len = len;
+  memmove(uip_appdata, data, len);
+  coap_receive(ctx);
+  return 0;
+}

apps/er-coap/er-coap-dtls.h

@@ -0,0 +1,47 @@
+#ifndef COAP_DTLS_H_
+#define COAP_DTLS_H_
+
+/* Internal configuration of tinydtls for er-coap-dtls */
+
+#if defined DTLS_CONF_IDENTITY && defined DTLS_CONF_IDENTITY_LENGTH
+#define DTLS_IDENTITY DTLS_CONF_IDENTITY
+#define DTLS_IDENTITY_LENGTH DTLS_CONF_IDENTITY_LENGTH
+#else
+#define DTLS_IDENTITY "Client_identity"
+#define DTLS_IDENTITY_LENGTH 15
+#endif
+
+#if defined DTLS_CONF_PSK_KEY && defined DTLS_CONF_PSK_KEY_LENGTH
+#define DTLS_PSK_KEY_VALUE DTLS_CONF_PSK_KEY
+#define DTLS_PSK_KEY_VALUE_LENGTH DTLS_CONF_PSK_KEY_LENGTH
+#else
+#warning "DTLS: Using default secret key !"
+#define DTLS_PSK_KEY_VALUE "secretPSK"
+#define DTLS_PSK_KEY_VALUE_LENGTH 9
+#endif
+
+/* Structure that hold tinydtls callbacks, has type 'dtls_handler_t'. */
+#ifndef COAP_DTLS_CALLBACK
+#ifdef COAP_DTLS_CONF_CALLBACK
+#define COAP_DTLS_CALLBACK COAP_DTLS_CONF_CALLBACK
+#else /* COAP_DTLS_CONF_CALLBACK */
+#define COAP_DTLS_CALLBACK coap_dtls_callback
+#endif /* COAP_DTLS_CALLBACK */
+
+/* Send 'data' to peer defined by session */
+int coap_dtls_send_to_peer(struct dtls_context_t *ctx,
+                           session_t *session, uint8 *data, size_t len);
+
+/* Read 'data' from peer */
+int coap_dtls_read_from_peer(struct dtls_context_t *ctx,
+                             session_t *session, uint8 *data, size_t len);
+#ifdef DTLS_PSK
+/* Retrieve the key for given identity withing this session */
+int coap_dtls_get_psk_info(struct dtls_context_t *ctx,
+                           const session_t *session,
+                           dtls_credentials_type_t type,
+                           const unsigned char *id, size_t id_len,
+                           unsigned char *result, size_t result_length);
+#endif
+
+#endif /* COAP_DTLS_H_ */

apps/er-coap/er-coap-engine.c

@@ -41,6 +41,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include "er-coap-engine.h"
+#include "er-coap-communication.h"
 
 #define DEBUG 0
 #if DEBUG
@@ -64,8 +65,8 @@ static service_callback_t service_cbk = NULL;
 /*---------------------------------------------------------------------------*/
 /*- Internal API ------------------------------------------------------------*/
 /*---------------------------------------------------------------------------*/
-static int
+int
-coap_receive(void)
+coap_receive()
 {
   erbium_status_code = NO_ERROR;
 
@@ -346,7 +347,7 @@ PROCESS_THREAD(coap_engine, ev, data)
     PROCESS_YIELD();
 
     if(ev == tcpip_event) {
-      coap_receive();
+      coap_handle_receive();
     } else if(ev == PROCESS_EVENT_TIMER) {
       /* retransmissions are handled here */
       coap_check_transactions();

apps/er-coap/er-coap-engine.h

@@ -52,6 +52,7 @@ typedef coap_packet_t rest_request_t;
 typedef coap_packet_t rest_response_t;
 
 void coap_init_engine(void);
+int coap_receive();
 
 /*---------------------------------------------------------------------------*/
 /*- Client Part -------------------------------------------------------------*/

apps/er-coap/er-coap-udp.c

@@ -0,0 +1,42 @@
+#include "contiki.h"
+#include "contiki-net.h"
+#include "er-coap-engine.h"
+#include "er-coap-communication.h"
+
+#include <string.h>
+
+#define DEBUG DEBUG_NONE
+#include "uip-debug.h"
+
+static struct uip_udp_conn *udp_conn = NULL;
+
+/*-----------------------------------------------------------------------------------*/
+void
+coap_init_communication_layer(uint16_t port)
+{
+  /* new connection with remote host */
+  udp_conn = udp_new(NULL, 0, NULL);
+  udp_bind(udp_conn, port);
+  PRINTF("Listening on port %u\n", uip_ntohs(udp_conn->lport));
+}
+/*-----------------------------------------------------------------------------------*/
+void
+coap_send_message(uip_ipaddr_t *addr, uint16_t port, uint8_t *data, uint16_t length)
+{
+  /* Configure connection to reply to client */
+  uip_ipaddr_copy(&udp_conn->ripaddr, addr);
+  udp_conn->rport = port;
+
+  uip_udp_packet_send(udp_conn, data, length);
+  PRINTF("-sent UDP datagram (%u)-\n", length);
+
+  /* Restore server connection to allow data from any node */
+  memset(&udp_conn->ripaddr, 0, sizeof(udp_conn->ripaddr));
+  udp_conn->rport = 0;
+}
+/*-----------------------------------------------------------------------------------*/
+void
+coap_handle_receive()
+{
+  coap_receive();
+}

apps/er-coap/er-coap.c

@@ -44,6 +44,7 @@
 
 #include "er-coap.h"
 #include "er-coap-transactions.h"
+#include "er-coap-communication.h"
 
 #define DEBUG 0
 #if DEBUG
@@ -60,7 +61,6 @@
 /*---------------------------------------------------------------------------*/
 /*- Variables ---------------------------------------------------------------*/
 /*---------------------------------------------------------------------------*/
-static struct uip_udp_conn *udp_conn = NULL;
 static uint16_t current_mid = 0;
 
 coap_status_t erbium_status_code = NO_ERROR;
@@ -279,9 +279,7 @@ void
 coap_init_connection(uint16_t port)
 {
   /* new connection with remote host */
-  udp_conn = udp_new(NULL, 0, NULL);
+  coap_init_communication_layer(port);
-  udp_bind(udp_conn, port);
-  PRINTF("Listening on port %u\n", uip_ntohs(udp_conn->lport));
 
   /* initialize transaction ID */
   current_mid = random_rand();
@@ -422,23 +420,6 @@ coap_serialize_message(void *packet, uint8_t *buffer)
   return (option - buffer) + coap_pkt->payload_len; /* packet length */
 }
 /*---------------------------------------------------------------------------*/
-void
-coap_send_message(uip_ipaddr_t *addr, uint16_t port, uint8_t *data,
-                  uint16_t length)
-{
-  /* configure connection to reply to client */
-  uip_ipaddr_copy(&udp_conn->ripaddr, addr);
-  udp_conn->rport = port;
-
-  uip_udp_packet_send(udp_conn, data, length);
-
-  PRINTF("-sent UDP datagram (%u)-\n", length);
-
-  /* restore server socket to allow data from any node */
-  memset(&udp_conn->ripaddr, 0, sizeof(udp_conn->ripaddr));
-  udp_conn->rport = 0;
-}
-/*---------------------------------------------------------------------------*/
 coap_status_t
 coap_parse_message(void *packet, uint8_t *data, uint16_t data_len)
 {

apps/tinydtls

@@ -0,0 +1 @@
+Subproject commit e95b02584a0041817da67c8c01f2a197d0c26915

doc/Doxyfile

@@ -809,7 +809,8 @@ EXCLUDE_SYMLINKS       = NO
 
 EXCLUDE_PATTERNS       = */cpu/cc26xx-cc13xx/lib/* \
                          */cpu/cc26xx-cc13xx/rf-core/api/* \
-			 */platform/stm32nucleo-spirit1/stm32cube-lib/*
+                         */platform/stm32nucleo-spirit1/stm32cube-lib/* \
+                         */apps/tinydtls/*
 
 # The EXCLUDE_SYMBOLS tag can be used to specify one or more symbol names
 # (namespaces, classes, functions, etc.) that should be excluded from the

examples/er-rest-dtls/Makefile

@@ -0,0 +1,25 @@
+all: er-example-server er-example-client
+
+CONTIKI=../..
+
+CFLAGS += -DPROJECT_CONF_H=\"project-conf.h\"
+
+WITH_DTLS_COAP ?= 1
+
+# automatically build RESTful resources
+ER_EXAMPLE = $(CONTIKI)/examples/er-rest-example
+REST_RESOURCES_DIR = $(ER_EXAMPLE)/resources
+REST_RESOURCES_FILES += res-push.c
+REST_RESOURCES_FILES += res-hello.c
+PROJECTDIRS += $(REST_RESOURCES_DIR)
+PROJECT_SOURCEFILES += $(REST_RESOURCES_FILES)
+
+# linker optimizations
+SMALL=1
+
+# REST Engine shall use Erbium CoAP implementation
+APPS += er-coap
+APPS += rest-engine
+
+CONTIKI_WITH_IPV6 = 1
+include $(CONTIKI)/Makefile.include

examples/er-rest-dtls/er-example-client.c

@@ -0,0 +1,111 @@
+/*
+ * Copyright (c) 2013, Institute for Pervasive Computing, ETH Zurich
+ * 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 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.
+ */
+
+/**
+ * \file
+ *      Erbium (Er) CoAP client example.
+ * \author
+ *      Matthias Kovatsch <kovatsch@inf.ethz.ch>
+ *      Gaëtan Harter <gaetan.harter@inria.fr>
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "contiki.h"
+#include "contiki-net.h"
+#include "er-coap-engine.h"
+
+#define DEBUG 0
+#include "uip-debug.h"
+
+#ifndef ER_COAP_SERVER_ADDR
+/* cooja2 */
+#define ER_COAP_SERVER_ADDR "fe80::0212:7402:0002:0x0202"
+#endif /* ER_COAP_SERVER_ADDR */
+
+#define REMOTE_PORT     UIP_HTONS(COAP_DEFAULT_PORT)
+
+#define TOGGLE_INTERVAL 10
+
+PROCESS(er_example_client, "Erbium Example Client");
+AUTOSTART_PROCESSES(&er_example_client);
+
+
+/* This function is will be passed to COAP_BLOCKING_REQUEST() to handle responses. */
+void
+client_chunk_handler(void *response)
+{
+  const uint8_t *chunk;
+
+  int len = coap_get_payload(response, &chunk);
+
+  printf("|%.*s", len, (char *)chunk);
+}
+PROCESS_THREAD(er_example_client, ev, data)
+{
+  PROCESS_BEGIN();
+
+  static struct etimer et;
+  static coap_packet_t request[1];      /* This way the packet can be treated as pointer as usual. */
+  static uip_ipaddr_t server_ipaddr;
+
+  uiplib_ipaddrconv(ER_COAP_SERVER_ADDR, &server_ipaddr);
+
+  /* receives all CoAP messages */
+  coap_init_engine();
+
+  etimer_set(&et, TOGGLE_INTERVAL * CLOCK_SECOND);
+
+  while(1) {
+    PROCESS_YIELD();
+
+    if(etimer_expired(&et)) {
+      printf("--Toggle timer--\n");
+
+      /* prepare request, TID is set by COAP_BLOCKING_REQUEST() */
+      coap_init_message(request, COAP_TYPE_CON, COAP_GET, 0);
+      coap_set_header_uri_path(request, "test/hello");
+
+      PRINT6ADDR(&server_ipaddr);
+      PRINTF(" : %u\n", UIP_HTONS(REMOTE_PORT));
+
+      COAP_BLOCKING_REQUEST(&server_ipaddr, REMOTE_PORT, request,
+                            client_chunk_handler);
+
+      printf("\n--Done--\n");
+
+      etimer_reset(&et);
+    }
+  }
+
+  PROCESS_END();
+}

examples/er-rest-dtls/er-example-server.c

@@ -0,0 +1,98 @@
+/*
+ * Copyright (c) 2013, Institute for Pervasive Computing, ETH Zurich
+ * 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 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.
+ */
+
+/**
+ * \file
+ *      Erbium (Er) REST Engine example.
+ * \author
+ *      Matthias Kovatsch <kovatsch@inf.ethz.ch>
+ *      Gaëtan Harter <gaetan.harter@inria.fr>
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "contiki.h"
+#include "contiki-net.h"
+#include "rest-engine.h"
+
+#define DEBUG 0
+#include "uip-debug.h"
+
+/*
+ * Resources to be activated need to be imported through the extern keyword.
+ * The build system automatically compiles the resources in the corresponding sub-directory.
+ */
+extern resource_t
+  res_hello,
+  res_push;
+
+PROCESS(er_example_server, "Erbium Example Server");
+AUTOSTART_PROCESSES(&er_example_server);
+
+PROCESS_THREAD(er_example_server, ev, data)
+{
+  PROCESS_BEGIN();
+
+  PROCESS_PAUSE();
+
+  PRINTF("Starting Erbium Example Server\n");
+
+#ifdef RF_CHANNEL
+  PRINTF("RF channel: %u\n", RF_CHANNEL);
+#endif
+#ifdef IEEE802154_PANID
+  PRINTF("PAN ID: 0x%04X\n", IEEE802154_PANID);
+#endif
+
+  PRINTF("uIP buffer: %u\n", UIP_BUFSIZE);
+  PRINTF("LL header: %u\n", UIP_LLH_LEN);
+  PRINTF("IP+UDP header: %u\n", UIP_IPUDPH_LEN);
+  PRINTF("REST max chunk: %u\n", REST_MAX_CHUNK_SIZE);
+
+  /* Initialize the REST engine. */
+  rest_init_engine();
+
+  /*
+   * Bind the resources to their Uri-Path.
+   * WARNING: Activating twice only means alternate path, not two instances!
+   * All static variables are the same for each URI path.
+   */
+  rest_activate_resource(&res_hello, "test/hello");
+  rest_activate_resource(&res_push, "test/push");
+
+  /* Define application-specific events here. */
+  while(1) {
+    PROCESS_WAIT_EVENT();
+  }                             /* while (1) */
+
+  PROCESS_END();
+}

examples/er-rest-dtls/project-conf.h

@@ -0,0 +1,77 @@
+/*
+ * Copyright (c) 2013, Institute for Pervasive Computing, ETH Zurich
+ * 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 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.
+ */
+
+/**
+ * \file
+ *      Erbium (Er) example project configuration.
+ * \author
+ *      Matthias Kovatsch <kovatsch@inf.ethz.ch>
+ */
+
+#ifndef __PROJECT_ERBIUM_CONF_H__
+#define __PROJECT_ERBIUM_CONF_H__
+
+/* Custom channel and PAN ID configuration for your project. */
+
+/* IP buffer size must match all other hops, in particular the border router. */
+#define UIP_CONF_BUFFER_SIZE           1500
+
+/* Increase rpl-border-router IP-buffer when using more than 64. */
+#undef REST_MAX_CHUNK_SIZE
+#define REST_MAX_CHUNK_SIZE            48
+
+/* Estimate your header size, especially when using Proxy-Uri. */
+/*
+   #undef COAP_MAX_HEADER_SIZE
+   #define COAP_MAX_HEADER_SIZE           70
+ */
+
+/* Multiplies with chunk size, be aware of memory constraints. */
+#undef COAP_MAX_OPEN_TRANSACTIONS
+#define COAP_MAX_OPEN_TRANSACTIONS     4
+
+/* Must be <= open transactions, default is COAP_MAX_OPEN_TRANSACTIONS-1. */
+/*
+   #undef COAP_MAX_OBSERVERS
+   #define COAP_MAX_OBSERVERS             2
+ */
+
+/* Filtering .well-known/core per query can be disabled to save space. */
+#undef COAP_LINK_FORMAT_FILTERING
+#define COAP_LINK_FORMAT_FILTERING     0
+#undef COAP_PROXY_OPTION_PROCESSING
+#define COAP_PROXY_OPTION_PROCESSING   0
+
+
+/* Enable client-side support for COAP observe */
+#define COAP_OBSERVE_CLIENT 1
+
+#endif /* __PROJECT_ERBIUM_CONF_H__ */