nes-proj/examples/lwm2m-ipso-objects/example-server.c
2018-05-09 22:18:01 +01:00

378 lines
11 KiB
C

/*
* 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"
#include "net/ipv6/uip.h"
#include "net/ipv6/uip-ds6.h"
#include "net/netstack.h"
#include "net/routing/routing.h"
#include "coap-transport.h"
#include "coap-blocking-api.h"
#include "lwm2m-engine.h"
#include "lwm2m-tlv.h"
#include "dev/serial-line.h"
#include "serial-protocol.h"
#include <stdbool.h>
#define DEBUG DEBUG_PRINT
#include "net/ipv6/uip-debug.h"
#define REMOTE_PORT UIP_HTONS(COAP_DEFAULT_PORT)
#define EVENT_RUN_NOW 0
#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 {
coap_endpoint_t endpoint;
char type[64];
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].endpoint.ipaddr, addr)) {
/* Node already added */
return &nodes[i];
}
}
if(node_count < MAX_NODES) {
memset(&nodes[node_count].endpoint, 0, sizeof(coap_endpoint_t));
uip_ipaddr_copy(&nodes[node_count].endpoint.ipaddr, addr);
nodes[node_count].endpoint.port = REMOTE_PORT;
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].endpoint.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_post(&router_process, EVENT_RUN_NOW, NULL);
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].endpoint.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_post(&router_process, EVENT_RUN_NOW, NULL);
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].endpoint.ipaddr);
}
}
printf("\n");
}
/*---------------------------------------------------------------------------*/
/**
* This function is will be passed to COAP_BLOCKING_REQUEST() to
* handle responses.
*/
static void
client_chunk_handler(coap_message_t *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(response->code >= BAD_REQUEST_4_00) {
PRINTF("\nReceived error %u: %.*s\n", response->code, len, (char *)chunk);
} else 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->endpoint.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) - 1, "%d", value);
} else {
PRINTF("Failed to parse LWM2M TLV\n");
}
} else {
if(len > sizeof(current_value) - 1) {
len = sizeof(current_value) - 1;
}
memcpy(current_value, chunk, len);
current_value[len] = 0;
}
}
}
/*---------------------------------------------------------------------------*/
#if UIP_CONF_IPV6_RPL
static bool
check_rpl_routes(void)
{
uip_sr_node_t *link;
uip_ipaddr_t child_ipaddr;
uip_ipaddr_t parent_ipaddr;
/* Our routing links */
for(link = uip_sr_node_head(); link != NULL; link = uip_sr_node_next(link)) {
NETSTACK_ROUTING.get_sr_node_ipaddr(&child_ipaddr, link);
if(link->parent == NULL) {
/* Igore the DAG root */
continue;
}
current_target = add_node(&child_ipaddr);
if(current_target == NULL ||
(current_target->flags & NODE_HAS_TYPE) != 0 ||
current_target->retries > 5) {
continue;
}
NETSTACK_ROUTING.get_sr_node_ipaddr(&parent_ipaddr, link->parent);
PRINTF(" ");
PRINT6ADDR(&child_ipaddr);
PRINTF(" -> ");
PRINT6ADDR(&parent_ipaddr);
PRINTF("\n");
return true;
}
return false;
}
#endif /* UIP_CONF_IPV6_RPL */
/*---------------------------------------------------------------------------*/
#if (UIP_MAX_ROUTES != 0)
static bool
check_routes(void)
{
uip_ds6_route_t *r;
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);
} else {
PRINTF("-");
}
PRINTF("\n");
return true;
}
return false;
}
#endif /* (UIP_MAX_ROUTES != 0) */
/*---------------------------------------------------------------------------*/
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;
PROCESS_BEGIN();
/* Initialize DAG root */
NETSTACK_ROUTING.root_start();
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;
#if UIP_CONF_IPV6_RPL
check_rpl_routes();
#endif /* UIP_CONF_IPV6_RPL */
#if (UIP_MAX_ROUTES != 0)
if(current_target == NULL) {
check_routes();
}
#endif /* (UIP_MAX_ROUTES != 0) */
}
/* 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->endpoint.ipaddr);
PRINTF("]:%u (%u tx)\n", UIP_HTONS(current_target->endpoint.port),
current_target->retries);
fetching_type = 1;
COAP_BLOCKING_REQUEST(&current_target->endpoint, request,
client_chunk_handler);
fetching_type = 0;
strncpy(current_uri, URL_LIGHT_CONTROL, sizeof(current_uri) - 1);
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->endpoint.ipaddr);
PRINTF("]:%u %s\n", UIP_HTONS(current_target->endpoint.port),
current_uri);
COAP_BLOCKING_REQUEST(&current_target->endpoint, 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->endpoint.ipaddr);
printf(" %s %s\n", current_uri, current_value);
current_target = NULL;
current_uri[0] = 0;
current_value[0] = 0;
}
}
PROCESS_END();
}
/*---------------------------------------------------------------------------*/