1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
|
/*
* Copyright (c) 2013-2023, The PurpleI2P Project
*
* This file is part of Purple i2pd project and licensed under BSD3
*
* See full license text in LICENSE file at top of project tree
*/
#include "MatchedDestination.h"
#include "Log.h"
#include "ClientContext.h"
namespace i2p
{
namespace client
{
MatchedTunnelDestination::MatchedTunnelDestination(const i2p::data::PrivateKeys & keys, const std::string & remoteName, const std::map<std::string, std::string> * params)
: RunnableClientDestination(keys, false, params),
m_RemoteName(remoteName) {}
void MatchedTunnelDestination::ResolveCurrentLeaseSet()
{
auto addr = i2p::client::context.GetAddressBook().GetAddress (m_RemoteName);
if(addr && addr->IsIdentHash ())
{
m_RemoteIdent = addr->identHash;
auto ls = FindLeaseSet(m_RemoteIdent);
if(ls)
HandleFoundCurrentLeaseSet(ls);
else
RequestDestination(m_RemoteIdent, std::bind(&MatchedTunnelDestination::HandleFoundCurrentLeaseSet, this, std::placeholders::_1));
}
else
LogPrint(eLogWarning, "Destination: Failed to resolve ", m_RemoteName);
}
void MatchedTunnelDestination::HandleFoundCurrentLeaseSet(std::shared_ptr<const i2p::data::LeaseSet> ls)
{
if(ls)
{
LogPrint(eLogDebug, "Destination: Resolved remote lease set for ", m_RemoteName);
m_RemoteLeaseSet = ls;
}
else
{
m_ResolveTimer->expires_from_now(boost::posix_time::seconds(1));
m_ResolveTimer->async_wait([&](const boost::system::error_code & ec) {
if(!ec) ResolveCurrentLeaseSet();
});
}
}
void MatchedTunnelDestination::Start()
{
ClientDestination::Start();
m_ResolveTimer = std::make_shared<boost::asio::deadline_timer>(GetService());
GetTunnelPool()->SetCustomPeerSelector(this);
ResolveCurrentLeaseSet();
}
void MatchedTunnelDestination::Stop()
{
ClientDestination::Stop();
if(m_ResolveTimer)
m_ResolveTimer->cancel();
}
bool MatchedTunnelDestination::SelectPeers(i2p::tunnel::Path & path, int hops, bool inbound)
{
auto pool = GetTunnelPool();
if(!pool || !pool->StandardSelectPeers(path, hops, inbound,
std::bind(&i2p::tunnel::TunnelPool::SelectNextHop, pool, std::placeholders::_1,
std::placeholders::_2, std::placeholders::_3)))
return false;
// more here for outbound tunnels
if(!inbound && m_RemoteLeaseSet)
{
if(m_RemoteLeaseSet->IsExpired())
ResolveCurrentLeaseSet();
if(m_RemoteLeaseSet && !m_RemoteLeaseSet->IsExpired())
{
// remote lease set is good
auto leases = m_RemoteLeaseSet->GetNonExpiredLeases();
// pick lease
std::shared_ptr<i2p::data::RouterInfo> obep;
while(!obep && leases.size() > 0)
{
auto idx = rand() % leases.size();
auto lease = leases[idx];
obep = i2p::data::netdb.FindRouter(lease->tunnelGateway);
leases.erase(leases.begin()+idx);
}
if(obep)
{
path.Add (obep);
LogPrint(eLogDebug, "Destination: Found OBEP matching IBGW");
} else
LogPrint(eLogWarning, "Destination: Could not find proper IBGW for matched outbound tunnel");
}
}
return true;
}
}
}
|
