nes-proj/examples/ipso-objects/example-server.c

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/*
* Copyright (c) 2015, Yanzi Networks AB.
* 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 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.
*
*/
/**
* \file
* IPSO Objects and OMA LWM2M example.
* \author
* Joakim Eriksson, joakime@sics.se
* Niclas Finne, nfi@sics.se
*/
#include "contiki.h"
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#include "net/ipv6/uip.h"
#include "net/netstack.h"
#include "net/routing/routing.h"
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#include "coap-constants.h"
#include "coap-engine.h"
#include "lwm2m-engine.h"
#include "lwm2m-tlv.h"
#include "dev/serial-line.h"
#include "serial-protocol.h"
#define DEBUG DEBUG_PRINT
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#include "net/ipv6/uip-debug.h"
#define REMOTE_PORT UIP_HTONS(COAP_DEFAULT_PORT)
#define URL_WELL_KNOWN ".well-known/core"
#define URL_DEVICE_MODEL "/3/0/1"
#define URL_DEVICE_FIRMWARE_VERSION "/3/0/3"
#define URL_LIGHT_CONTROL "/3311/0/5850"
#define URL_POWER_CONTROL "/3312/0/5850"
#define MAX_NODES 10
#define NODE_HAS_TYPE (1 << 0)
struct node {
uip_ipaddr_t ipaddr;
char type[32];
uint8_t flags;
uint8_t retries;
};
static struct node nodes[MAX_NODES];
static uint8_t node_count;
static struct node *current_target;
static char current_uri[32] = URL_LIGHT_CONTROL;
static char current_value[32] = "1";
static int current_request = COAP_PUT;
static uint8_t fetching_type = 0;
PROCESS(router_process, "router process");
AUTOSTART_PROCESSES(&router_process);
/*---------------------------------------------------------------------------*/
static struct node *
add_node(const uip_ipaddr_t *addr)
{
int i;
for(i = 0; i < node_count; i++) {
if(uip_ipaddr_cmp(&nodes[i].ipaddr, addr)) {
/* Node already added */
return &nodes[i];
}
}
if(node_count < MAX_NODES) {
uip_ipaddr_copy(&nodes[node_count].ipaddr, addr);
return &nodes[node_count++];
}
return NULL;
}
/*---------------------------------------------------------------------------*/
void
set_value(const uip_ipaddr_t *addr, char *uri, char *value)
{
int i;
printf("#set value ");
uip_debug_ipaddr_print(addr);
printf(" URI: %s Value: %s\n", uri, value);
for(i = 0; i < node_count; i++) {
if(uip_ipaddr_cmp(&nodes[i].ipaddr, addr)) {
/* setup command */
current_target = &nodes[i];
current_request = COAP_PUT;
strncpy(current_uri, uri, sizeof(current_uri) - 1);
strncpy(current_value, value, sizeof(current_value) - 1);
process_poll(&router_process);
break;
}
}
}
/*---------------------------------------------------------------------------*/
void
get_value(const uip_ipaddr_t *addr, char *uri)
{
int i;
printf("#get value ");
uip_debug_ipaddr_print(addr);
printf(" URI: %s\n", uri);
for(i = 0; i < node_count; i++) {
if(uip_ipaddr_cmp(&nodes[i].ipaddr, addr)) {
/* setup command */
current_target = &nodes[i];
current_request = COAP_GET;
strncpy(current_uri, uri, sizeof(current_uri) - 1);
current_value[0] = 0;
process_poll(&router_process);
break;
}
}
}
/*---------------------------------------------------------------------------*/
void
print_node_list(void)
{
int i;
int out = 0;
for(i = 0; i < node_count; i++) {
if(nodes[i].flags & NODE_HAS_TYPE) {
if(out++) {
printf(";");
}
printf("%s,", nodes[i].type);
uip_debug_ipaddr_print(&nodes[i].ipaddr);
}
}
printf("\n");
}
/*---------------------------------------------------------------------------*/
/**
* This function is will be passed to COAP_BLOCKING_REQUEST() to
* handle responses.
*/
static void
client_chunk_handler(void *response)
{
const uint8_t *chunk;
unsigned int format;
int len = coap_get_payload(response, &chunk);
coap_get_header_content_format(response, &format);
/* if(len > 0) { */
/* printf("|%.*s (%d,%d)", len, (char *)chunk, len, format); */
/* } */
if(current_target != NULL && fetching_type) {
if(len > sizeof(current_target->type) - 1) {
len = sizeof(current_target->type) - 1;
}
memcpy(current_target->type, chunk, len);
current_target->type[len] = 0;
current_target->flags |= NODE_HAS_TYPE;
PRINTF("\nNODE ");
PRINT6ADDR(&current_target->ipaddr);
PRINTF(" HAS TYPE %s\n", current_target->type);
} else {
/* otherwise update the current value */
if(format == LWM2M_TLV) {
lwm2m_tlv_t tlv;
/* we can only read int32 for now ? */
if(lwm2m_tlv_read(&tlv, chunk, len) > 0) {
/* printf("TLV.type=%d len=%d id=%d value[0]=%d\n", */
/* tlv.type, tlv.length, tlv.id, tlv.value[0]); */
int value = lwm2m_tlv_get_int32(&tlv);
snprintf(current_value, sizeof(current_value), "%d", value);
}
} else {
if(len > sizeof(current_value) - 1) {
len = sizeof(current_value) - 1;
}
memcpy(current_value, chunk, len);
current_value[len] = 0;
}
}
}
/*---------------------------------------------------------------------------*/
static void
setup_network(void)
{
uip_ipaddr_t ipaddr;
struct uip_ds6_addr *root_if;
rpl_dag_t *dag;
int i;
uint8_t state;
#if UIP_CONF_ROUTER
/**
* The choice of server address determines its 6LoWPAN header compression.
* Obviously the choice made here must also be selected in udp-client.c.
*
* For correct Wireshark decoding using a sniffer, add the /64 prefix to the 6LowPAN protocol preferences,
* e.g. set Context 0 to fd00::. At present Wireshark copies Context/128 and then overwrites it.
* (Setting Context 0 to fd00::1111:2222:3333:4444 will report a 16 bit compressed address of fd00::1111:22ff:fe33:xxxx)
* Note Wireshark's IPCMV6 checksum verification depends on the correct uncompressed addresses.
*/
#if 0
/* Mode 1 - 64 bits inline */
uip_ip6addr(&ipaddr, UIP_DS6_DEFAULT_PREFIX, 0, 0, 0, 0, 0, 0, 1);
#elif 1
/* Mode 2 - 16 bits inline */
uip_ip6addr(&ipaddr, UIP_DS6_DEFAULT_PREFIX, 0, 0, 0, 0, 0x00ff, 0xfe00, 1);
#else
/* Mode 3 - derived from link local (MAC) address */
uip_ip6addr(&ipaddr, UIP_DS6_DEFAULT_PREFIX, 0, 0, 0, 0, 0, 0, 0);
uip_ds6_set_addr_iid(&ipaddr, &uip_lladdr);
#endif
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NETSTACK_ROUTING.root_set_prefix(&ipaddr, &ipaddr);
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NETSTACK_ROUTING.root_start();
#endif /* UIP_CONF_ROUTER */
PRINTF("IPv6 addresses: ");
for(i = 0; i < UIP_DS6_ADDR_NB; i++) {
state = uip_ds6_if.addr_list[i].state;
if(state == ADDR_TENTATIVE || state == ADDR_PREFERRED) {
PRINT6ADDR(&uip_ds6_if.addr_list[i].ipaddr);
PRINTF("\n");
/* hack to make address "final" */
if (state == ADDR_TENTATIVE) {
uip_ds6_if.addr_list[i].state = ADDR_PREFERRED;
}
}
}
}
/*---------------------------------------------------------------------------*/
PROCESS_THREAD(router_process, ev, data)
{
/* This way the message can be treated as pointer as usual. */
static coap_message_t request[1];
static struct etimer timer;
uip_ds6_route_t *r;
uip_ipaddr_t *nexthop;
int n;
PROCESS_BEGIN();
PROCESS_PAUSE();
/* receives all CoAP messages */
coap_engine_init();
setup_network();
while(1) {
etimer_set(&timer, CLOCK_SECOND * 5);
PROCESS_YIELD();
/* Handle serial line input */
if(ev == serial_line_event_message) {
serial_protocol_input((char *) data);
}
if(etimer_expired(&timer)) {
current_target = NULL;
n = 0;
for(r = uip_ds6_route_head(); r != NULL; r = uip_ds6_route_next(r)) {
current_target = add_node(&r->ipaddr);
if(current_target == NULL ||
(current_target->flags & NODE_HAS_TYPE) != 0 ||
current_target->retries > 5) {
continue;
}
PRINTF(" ");
PRINT6ADDR(&r->ipaddr);
PRINTF(" -> ");
nexthop = uip_ds6_route_nexthop(r);
if(nexthop != NULL) {
PRINT6ADDR(nexthop);
PRINTF("\n");
} else {
PRINTF("-");
}
PRINTF("\n");
n++;
break;
}
}
/* This is a node type discovery */
if(current_target != NULL &&
(current_target->flags & NODE_HAS_TYPE) == 0 &&
current_target->retries < 6) {
/* 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, URL_DEVICE_MODEL);
current_target->retries++;
PRINTF("CoAP request to [");
PRINT6ADDR(&current_target->ipaddr);
PRINTF("]:%u (%u tx)\n", UIP_HTONS(REMOTE_PORT),
current_target->retries);
fetching_type = 1;
COAP_BLOCKING_REQUEST(&current_target->ipaddr, REMOTE_PORT, request,
client_chunk_handler);
fetching_type = 0;
strncpy(current_uri, URL_LIGHT_CONTROL, sizeof(current_uri));
printf("\n--Done--\n");
}
/* If having a type this is another type of request */
if(current_target != NULL &&
(current_target->flags & NODE_HAS_TYPE) && strlen(current_uri) > 0) {
/* prepare request, TID is set by COAP_BLOCKING_REQUEST() */
coap_init_message(request, COAP_TYPE_CON, current_request, 0);
coap_set_header_uri_path(request, current_uri);
if(strlen(current_value) > 0) {
coap_set_payload(request, (uint8_t *)current_value,
strlen(current_value));
}
PRINTF("CoAP request to [");
PRINT6ADDR(&current_target->ipaddr);
PRINTF("]:%u %s\n", UIP_HTONS(REMOTE_PORT), current_uri);
COAP_BLOCKING_REQUEST(&current_target->ipaddr, REMOTE_PORT, request,
client_chunk_handler);
/* print out result of command */
if(current_request == COAP_PUT) {
printf("s ");
} else {
printf("g ");
}
uip_debug_ipaddr_print(&current_target->ipaddr);
printf(" %s %s\n", current_uri, current_value);
current_target = NULL;
current_uri[0] = 0;
current_value[0] = 0;
}
}
PROCESS_END();
}
/*---------------------------------------------------------------------------*/