/** The JOIN message is answered by a JOINACK or a JOINNACK message.
* If the transmit time is too long, a JOINNACK is returned.
* If not, an JOINACK is answered, with all the peer's addresses
* that are in the leafset.
*/
void Handle (Chimera& chimera, const Host&, const Packet& pckt)
{
pf_addr addr = pckt.GetArg<pf_addr>(CHIMERA_JOIN_ADDRESS);
Host host = hosts_list.GetHost(addr);
double elapsed_time = time::dtime() - host.GetFailureTime();
if(elapsed_time < Chimera::GRACEPERIOD)
{
Packet join_nack(ChimeraJoinNAckType, chimera.GetMe().GetKey(), host.GetKey());
join_nack.SetArg(CHIMERA_JOIN_NACK_ADDRESS, addr);
chimera.Send(host, join_nack);
pf_log[W_ROUTING] << "JOIN request from node " << host << " rejected, "
<< "elapsed time since failure = " << elapsed_time << " sec";
return;
}
std::vector<Host> leafset = chimera.GetRouting()->getLeafset();
addr_list addresses;
for(std::vector<Host>::iterator it = leafset.begin(); it != leafset.end(); ++it)
addresses.push_back(it->GetAddr());
addresses.push_back(chimera.GetMe().GetAddr());
Packet join_ack(ChimeraJoinAckType, chimera.GetMe().GetKey(), host.GetKey());
join_ack.SetArg(CHIMERA_JOIN_ACK_ADDRESSES, addresses);
if(!chimera.Send(host, join_ack))
pf_log[W_ROUTING] << "Send join ACK message failed!";
}
/** We update the routing infrastructure with the given addresses */
void Handle (Chimera& chimera, const Host&, const Packet& pckt)
{
addr_list address = pckt.GetArg<addr_list>(CHIMERA_PIGGY_ADDRESSES);
for(addr_list::iterator it = address.begin(); it != address.end(); ++it)
{
Host host = hosts_list.GetHost(*it);
/* After a peer failed, we wait some time before adding it back. */
if(time::dtime() - host.GetFailureTime() > Chimera::GRACEPERIOD)
chimera.GetRouting()->add(host);
else
pf_log[W_ROUTING] << "Refused to add " << host << " to routing table";
}
}
