/// \brief Teleport an entity to the connected peer
///
/// @param ent The entity to be teleported
/// @return Returns 0 on success and -1 on failure
int Peer::teleportEntity(const Entity * ent)
{
if (m_state != PEER_AUTHENTICATED) {
log(ERROR, "Peer not authenticated yet.");
return -1;
}
long iid = ent->getIntId();
if (m_teleports.find(iid) != m_teleports.end()) {
log(INFO, "Transfer of this entity already in progress");
return -1;
}
struct timeval timeVal;
gettimeofday(&timeVal, NULL);
time_t teleport_time = timeVal.tv_sec;
// Add a teleport state object to identify this teleport request
TeleportState * s = new TeleportState(teleport_time);
if (s == NULL) {
log(ERROR, "Unable to allocate teleport state object");
return -1;
}
// Check if the entity has a mind
const Character * chr = dynamic_cast<const Character *>(ent);
ExternalMind * mind = 0;
if (chr != 0 && chr->m_externalMind != 0) {
mind = dynamic_cast<ExternalMind*>(chr->m_externalMind);
}
Atlas::Objects::Entity::Anonymous atlas_repr;
ent->addToEntity(atlas_repr);
Create op;
op->setFrom(m_accountId);
op->setSerialno(iid);
op->setArgs1(atlas_repr);
if (mind != 0 && mind->isConnected()) {
// Entities with a mind require an additional one-time possess key that
// is used by the client to authenticate a teleport on the destination
// peer
std::string key;
log(INFO, "Entity has a mind. Generating random key");
// FIXME non-random, plus potetial timing attack.
WFMath::MTRand generator;
for(int i=0;i<32;i++) {
char ch = (char)((int)'a' + generator.rand(25));
key += ch;
}
s->setKey(key);
// Add an additional possess key argument
log(INFO, String::compose("Adding possess key %1 to Create op", key));
Anonymous key_arg;
key_arg->setAttr("possess_key", key);
std::vector<Root> & create_args = op->modifyArgs();
create_args.push_back(key_arg);
}
m_commClient.send(op);
log(INFO, "Sent Create op to peer");
// Set it as validated and add to the list of teleports
s->setRequested();
m_teleports[iid] = s;
log(INFO, "Added new teleport state");
return 0;
}
