static void
res_get_handler(void *request, void *response, uint8_t *buffer, uint16_t preferred_size, int32_t *offset)
{
rpl_dag_t *dag;
rpl_parent_t *parent;
int32_t strpos = 0;
const uip_ipaddr_t *addr;
addr = &uip_ds6_if.addr_list[1].ipaddr;
dag = rpl_get_any_dag();
parent_index = 0;
if (dag != NULL)
{
/* seek to the parents entry and return it */
strpos += sprintf(&(buffer[strpos]),"{\"node\":\"n%x\"",addr->u8[15]); // last addr byte of mote
strpos += sprintf(&(buffer[strpos]),",\"nbr\":{");
parent = nbr_table_head(rpl_parents); // addr of first neighbor
while (parent != NULL)
{
etx_table[parent_index].nbr_addr = rpl_get_parent_ipaddr(parent)->u8[15];
etx_table[parent_index].nbr_etx = rpl_get_parent_link_metric(parent);
etx_table[parent_index].p = parent;
strpos += sprintf(&(buffer[strpos]),"\"n%x\":%u,",etx_table[parent_index].nbr_addr, etx_table[parent_index].nbr_etx);
parent = nbr_table_next(rpl_parents, parent);
parent_index++;
}
PRINTF("parent_index:%d\n",parent_index);
}
else
{ /* no DAG */
strpos += sprintf(&(buffer[strpos]),"{}\n");
}
//PRINTF("strpos: %ld\n", strpos);
//rpl_print_neighbor_list(); // get parents for debug purposes
//PRINTF("buf_parents: %s\n", buffer);
strpos += sprintf(&(buffer[strpos-1]),"}}\n"); //replace the last comma
//PRINTF("strpos-after: %ld\n", strpos);
REST.set_header_content_type(response, APPLICATION_JSON);
REST.set_header_max_age(response, res_etx.periodic->period / CLOCK_SECOND);
//*offset = -1; // try to fix Copper response
REST.set_response_payload(response, buffer, snprintf((char *)buffer, preferred_size, "%s", buffer));
/* The REST.subscription_handler() will be called for observable resources by the REST framework. */
}
/* length of an neighbor entry, must be fixed width */
uint16_t create_parent_msg(char *buf, rpl_parent_t *parent, uint8_t preferred)
{
uint8_t n = 0;
uip_ipaddr_t * addr = rpl_get_parent_ipaddr(parent);
n += sprintf(&(buf[n]), "{\"eui\":\"%04x%04x%04x%04x\",",
UIP_HTONS(addr->u16[4]),
UIP_HTONS(addr->u16[5]),
UIP_HTONS(addr->u16[6]),
UIP_HTONS(addr->u16[7]));
n += sprintf(&(buf[n]), "\"pref\":");
if(preferred == 1) {
n += sprintf(&(buf[n]), "true,");
} else {
n += sprintf(&(buf[n]), "false,");
}
n += sprintf(&(buf[n]), "\"etx\":%d}", rpl_get_parent_link_metric(parent));
buf[n] = 0;
PRINTF("buf: %s\n", buf);
return n;
}
/*
* Additionally, a handler function named [resource name]_handler must be implemented for each PERIODIC_RESOURCE.
* It will be called by the REST manager process with the defined period.
*/
static void
res_periodic_handler()
{
uint8_t parent_counter = 0;
uint16_t etx_temp;
uint8_t etx_changed = 0;
while(parent_counter < parent_index) {
etx_temp = rpl_get_parent_link_metric(etx_table[parent_counter].p);
PRINTF("etx_temp:%d\n",etx_temp);
if(etx_temp > etx_table[parent_counter].nbr_etx * 2 || etx_temp < etx_table[parent_counter].nbr_etx / 2 ) {
etx_table[parent_counter].nbr_etx = etx_temp ;
etx_changed = 1;
}
parent_counter++;
}
/* Notify the registered observers which will trigger the res_get_handler to create the response. */
if (etx_changed) {
PRINTF("etx_changed !\n");
REST.notify_subscribers(&res_etx);
}
}