Returns the header that must be set in each message when forwarding a multicast message
IMPORTANT: now all nodes receive exactly the same header (broadcast reminiscence), although
it should only receive
Returns a list with all the neighbours of the given address
If there are no neighbours, means that the node is isolated and
is not currently connected to the others
Obtains an OLSRPacket with the specified type,time,ttl and content;
with the local node as originator, the hop-count set to 0, and the
corresponding message sequence number.