/*função responsável por colocar o pacote na fila de envio, utilizado pelo transporte e thread de envio de rotas*/
PUBLIC int net_send(uint16_t dest, byte *data, size_t size, uint8_t protocol)
{
int node;
if(protocol == 0)
{
node = dest;
}
else
{
node = hostreachable(dest);
}
if(node != 0)
{
wait_item.dest = dest;
wait_item.src = num_global;
wait_item.data = data;
wait_item.size = size;
wait_item.protocol = protocol;
wait_item.first_dest_link = node;
wait_item.offset = 0;
wait_item.ttl = TTL;
wait_list_insert(wait_item);
return OK;
}
return ERROR;
}
/* si_sem_wait: wait operation on semaphore sem */
void si_sem_wait(si_semaphore *sem)
{
/* task id */
int task_id;
/* disable interrupts */
DISABLE_INTERRUPTS;
/* check counter */
if (sem->counter > 0)
{
/* decrement */
sem->counter--;
}
else
{
/* get task_id of running task */
task_id = task_get_task_id_running();
/* remove it from ready list */
ready_list_remove(task_id);
/* insert it into the semaphore waiting list */
wait_list_insert(
sem->wait_list, WAIT_LIST_SIZE, task_id);
/* call schedule */
schedule();
}
/* enable interrupts */
ENABLE_INTERRUPTS;
}
/*função responsável por colocar o pacote na fila de envio, utilizado recebimento de rotas para repasse*/
PUBLIC void net_resend(datagram_t *datagram)
{
int node;
wait_list_item_t resend;
if((node = hostreachable(datagram->dest))!=0)
{
resend.size = datagram->size;
resend.id = datagram->id;
resend.offset = datagram->frag;
resend.protocol = datagram->protocol;
resend.ttl = datagram->ttl;
resend.dest = datagram->dest;
resend.src = datagram->src;
resend.data = datagram->data;
resend.first_dest_link = node;
wait_list_insert(resend);
}
}
