void timeout() override
{
if (flags & flag_done) return;
flags |= flag_done;
bdecode_node e;
msg m(e, target_ep());
static_cast<direct_traversal*>(algorithm())->invoke_cb(m);
}
void traversal_observer::reply(msg const& m)
{
bdecode_node r = m.message.dict_find_dict("r");
if (!r)
{
#ifndef TORRENT_DISABLE_LOGGING
if (get_observer() != nullptr)
{
get_observer()->log(dht_logger::traversal
, "[%p] missing response dict"
, static_cast<void*>(algorithm()));
}
#endif
return;
}
#ifndef TORRENT_DISABLE_LOGGING
dht_observer* logger = get_observer();
if (logger != nullptr && logger->should_log(dht_logger::traversal))
{
bdecode_node nid = r.dict_find_string("id");
char hex_id[41];
aux::to_hex({nid.string_ptr(), 20}, hex_id);
logger->log(dht_logger::traversal
, "[%p] RESPONSE id: %s invoke-count: %d addr: %s type: %s"
, static_cast<void*>(algorithm()), hex_id, algorithm()->invoke_count()
, print_endpoint(target_ep()).c_str(), algorithm()->name());
}
#endif
// look for nodes
#if TORRENT_USE_IPV6
udp protocol = algorithm()->get_node().protocol();
#endif
char const* nodes_key = algorithm()->get_node().protocol_nodes_key();
bdecode_node n = r.dict_find_string(nodes_key);
if (n)
{
char const* nodes = n.string_ptr();
char const* end = nodes + n.string_length();
while (end - nodes >= 20 + detail::address_size(protocol) + 2)
{
node_id id;
std::copy(nodes, nodes + 20, id.begin());
nodes += 20;
udp::endpoint ep;
#if TORRENT_USE_IPV6
if (protocol == udp::v6())
ep = detail::read_v6_endpoint<udp::endpoint>(nodes);
else
#endif
ep = detail::read_v4_endpoint<udp::endpoint>(nodes);
algorithm()->traverse(id, ep);
}
}
bdecode_node id = r.dict_find_string("id");
if (!id || id.string_length() != 20)
{
#ifndef TORRENT_DISABLE_LOGGING
if (get_observer() != nullptr)
{
get_observer()->log(dht_logger::traversal, "[%p] invalid id in response"
, static_cast<void*>(algorithm()));
}
#endif
return;
}
// in case we didn't know the id of this peer when we sent the message to
// it. For instance if it's a bootstrap node.
set_id(node_id(id.string_ptr()));
}