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fixed nat-pmp bug

This commit is contained in:
Arvid Norberg 2008-12-02 08:20:29 +00:00
parent eacab8680e
commit 4cc15f34ad
1 changed files with 33 additions and 21 deletions
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54
src/natpmp.cpp
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@ -339,6 +339,14 @@ void natpmp::on_reply(error_code const& e
m_socket.async_receive_from(asio::buffer(&m_response_buffer, 16)
, m_remote, bind(&natpmp::on_reply, self(), _1, _2));
// simulate packet loss
/*
if ((rand() % 2) == 0)
{
log(" simulating drop");
return;
}
*/
if (m_remote != m_nat_endpoint)
{
std::stringstream msg;
@ -352,10 +360,6 @@ void natpmp::on_reply(error_code const& e
error_code ec;
m_send_timer.cancel(ec);
TORRENT_ASSERT(m_currently_mapping >= 0);
int i = m_currently_mapping;
mapping_t& m = m_mappings[i];
char* in = m_response_buffer;
int version = read_uint8(in);
int cmd = read_uint8(in);
@ -367,12 +371,13 @@ void natpmp::on_reply(error_code const& e
(void)time; // to remove warning
int protocol = (cmd - 128 == 1)?udp:tcp;
std::stringstream msg;
msg << "<== port map ["
<< " protocol: " << (cmd - 128 == 1 ? "udp" : "tcp")
<< " local: " << private_port << " external: " << public_port
<< " ttl: " << lifetime << " ]";
log(msg.str());
if (version != 0)
{
@ -381,30 +386,37 @@ void natpmp::on_reply(error_code const& e
log(msg.str());
}
if (private_port != m.local_port)
mapping_t* m = 0;
int index = -1;
for (std::vector<mapping_t>::iterator i = m_mappings.begin()
, end(m_mappings.end()); i != end; ++i)
{
std::stringstream msg;
msg << "unexpected local port: " << private_port;
log(msg.str());
if (private_port != i->local_port) continue;
if (protocol != i->protocol) continue;
if (!i->map_sent) continue;
m = &*i;
index = i - m_mappings.begin();
break;
}
if (cmd != 128 + m.protocol)
if (m == 0)
{
std::stringstream msg;
msg << "unexpected protocol: " << (cmd - 128);
msg << " not found in map table";
log(msg.str());
return;
}
log(msg.str());
if (public_port == 0 || lifetime == 0)
{
// this means the mapping was
// successfully closed
m.protocol = none;
m->protocol = none;
}
else
{
m.expires = time_now() + seconds(int(lifetime * 0.7f));
m.external_port = public_port;
m->expires = time_now() + seconds(int(lifetime * 0.7f));
m->external_port = public_port;
}
if (result != 0)
@ -419,19 +431,19 @@ void natpmp::on_reply(error_code const& e
case 4: errmsg << "Out of resources"; break;
case 5: errmsg << "Unsupported opcode"; break;
}
m.expires = time_now() + hours(2);
m_callback(i, 0, errmsg.str());
m->expires = time_now() + hours(2);
m_callback(index, 0, errmsg.str());
}
else if (m.action == mapping_t::action_add)
else if (m->action == mapping_t::action_add)
{
m_callback(i, m.external_port, "");
m_callback(index, m->external_port, "");
}
m_currently_mapping = -1;
m.action = mapping_t::action_none;
m->action = mapping_t::action_none;
m_send_timer.cancel(ec);
update_expiration_timer();
try_next_mapping(i);
try_next_mapping(index);
}
void natpmp::update_expiration_timer()