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add option to only connect to certain routers

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This commit is contained in:
Jeff Becker 2016-10-28 12:50:26 -04:00
parent 5c64c2ff42
commit 5f396d6311
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GPG key ID: AB950234D6EA286B
6 changed files with 130 additions and 26 deletions
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1
Config.cpp
View file

@ -184,6 +184,7 @@ namespace config {
trust.add_options()
("trust.enabled", value<bool>()->default_value(false), "enable explicit trust options")
("trust.family", value<std::string>()->default_value(""), "Router Familiy to trust for first hops")
("trust.routers", value<std::string>()->default_value(""), "Only Connect to these routers")
("trust.hidden", value<bool>()->default_value(false), "should we hide our router from other routers?");
m_OptionsDesc

36
Daemon.cpp
View file

@ -194,12 +194,40 @@ namespace i2p
{
LogPrint(eLogInfo, "Daemon: explicit trust enabled");
std::string fam; i2p::config::GetOption("trust.family", fam);
std::string routers; i2p::config::GetOption("trust.routers", routers);
bool restricted = false;
if (fam.length() > 0)
{
LogPrint(eLogInfo, "Daemon: setting restricted routes to use family ", fam);
i2p::transport::transports.RestrictRoutes({fam});
} else
LogPrint(eLogError, "Daemon: no family specified for restricted routes");
std::set<std::string> fams;
size_t pos = 0, comma;
do
{
comma = fam.find (',', pos);
fams.insert (fam.substr (pos, comma != std::string::npos ? comma - pos : std::string::npos));
pos = comma + 1;
}
while (comma != std::string::npos);
i2p::transport::transports.RestrictRoutesToFamilies(fams);
restricted = fams.size() > 0;
}
if (routers.length() > 0) {
std::set<i2p::data::IdentHash> idents;
size_t pos = 0, comma;
do
{
comma = routers.find (',', pos);
i2p::data::IdentHash ident;
ident.FromBase64 (routers.substr (pos, comma != std::string::npos ? comma - pos : std::string::npos));
idents.insert (ident);
pos = comma + 1;
}
while (comma != std::string::npos);
LogPrint(eLogInfo, "Daemon: setting restricted routes to use ", idents.size(), " trusted routesrs");
i2p::transport::transports.RestrictRoutesToRouters(idents);
restricted = idents.size() > 0;
}
if(!restricted)
LogPrint(eLogError, "Daemon: no trusted routers of families specififed");
}
bool hidden; i2p::config::GetOption("trust.hidden", hidden);
if (hidden)

7
NetDb.cpp
View file

@ -126,10 +126,8 @@ namespace data
i2p::context.CleanupDestination ();
lastDestinationCleanup = ts;
}
// if we're in hidden mode don't publish or explore
// if (m_HiddenMode) continue;
if (ts - lastPublish >= NETDB_PUBLISH_INTERVAL) // publish
if (ts - lastPublish >= NETDB_PUBLISH_INTERVAL && !m_HiddenMode) // publish
{
Publish ();
lastPublish = ts;
@ -148,7 +146,8 @@ namespace data
if (numRouters < 1) numRouters = 1;
if (numRouters > 9) numRouters = 9;
m_Requests.ManageRequests ();
Explore (numRouters);
if(!m_HiddenMode)
Explore (numRouters);
lastExploratory = ts;
}
}

88
Transports.cpp
View file

@ -241,6 +241,7 @@ namespace transport
i2p::HandleI2NPMessage (it);
return;
}
if(RoutesRestricted() && ! IsRestrictedPeer(ident)) return;
auto it = m_Peers.find (ident);
if (it == m_Peers.end ())
{
@ -494,6 +495,12 @@ namespace transport
void Transports::DetectExternalIP ()
{
if (RoutesRestricted())
{
LogPrint(eLogInfo, "Transports: restricted routes enabled, not detecting ip");
i2p::context.SetStatus (eRouterStatusFirewalled);
return;
}
if (m_SSUServer)
{
#ifndef MESHNET
@ -520,8 +527,10 @@ namespace transport
void Transports::PeerTest ()
{
if (RoutesRestricted()) return;
if (m_SSUServer)
{
bool statusChanged = false;
for (int i = 0; i < 5; i++)
{
@ -578,6 +587,12 @@ namespace transport
}
else // incoming connection
{
if(RoutesRestricted() && ! IsRestrictedPeer(ident)) {
// not trusted
LogPrint(eLogWarning, "Transports: closing untrusted inbound connection from ", ident.ToBase64());
session->Done();
return;
}
session->SendI2NPMessages ({ CreateDatabaseStoreMsg () }); // send DatabaseStore
std::unique_lock<std::mutex> l(m_PeersMutex);
m_Peers.insert (std::make_pair (ident, Peer{ 0, nullptr, { session }, i2p::util::GetSecondsSinceEpoch (), {} }));
@ -655,7 +670,7 @@ namespace transport
std::advance (it, rand () % m_Peers.size ());
return it != m_Peers.end () ? it->second.router : nullptr;
}
void Transports::RestrictRoutes(std::vector<std::string> families)
void Transports::RestrictRoutesToFamilies(std::set<std::string> families)
{
std::lock_guard<std::mutex> lock(m_FamilyMutex);
m_TrustedFamilies.clear();
@ -663,22 +678,71 @@ namespace transport
m_TrustedFamilies.push_back(fam);
}
void Transports::RestrictRoutesToRouters(std::set<i2p::data::IdentHash> routers)
{
std::unique_lock<std::mutex> lock(m_TrustedRoutersMutex);
m_TrustedRouters.clear();
for (const auto & ri : routers )
m_TrustedRouters.push_back(ri);
}
bool Transports::RoutesRestricted() const {
std::lock_guard<std::mutex> lock(m_FamilyMutex);
return m_TrustedFamilies.size() > 0;
std::unique_lock<std::mutex> famlock(m_FamilyMutex);
std::unique_lock<std::mutex> routerslock(m_TrustedRoutersMutex);
return m_TrustedFamilies.size() > 0 || m_TrustedRouters.size() > 0;
}
/** XXX: if routes are not restricted this dies */
std::shared_ptr<const i2p::data::RouterInfo> Transports::GetRestrictedPeer() const {
std::string fam;
{
std::lock_guard<std::mutex> lock(m_FamilyMutex);
// TODO: random family (?)
fam = m_TrustedFamilies[0];
}
boost::to_lower(fam);
return i2p::data::netdb.GetRandomRouterInFamily(fam);
std::shared_ptr<const i2p::data::RouterInfo> Transports::GetRestrictedPeer() const
{
{
std::lock_guard<std::mutex> l(m_FamilyMutex);
std::string fam;
auto sz = m_TrustedFamilies.size();
if(sz > 1)
{
auto it = m_TrustedFamilies.begin ();
std::advance(it, rand() % sz);
fam = *it;
boost::to_lower(fam);
}
else if (sz == 1)
{
fam = m_TrustedFamilies[0];
}
if (fam.size())
return i2p::data::netdb.GetRandomRouterInFamily(fam);
}
{
std::unique_lock<std::mutex> l(m_TrustedRoutersMutex);
auto sz = m_TrustedRouters.size();
if (sz)
{
if(sz == 1)
return i2p::data::netdb.FindRouter(m_TrustedRouters[0]);
auto it = m_TrustedRouters.begin();
std::advance(it, rand() % sz);
return i2p::data::netdb.FindRouter(*it);
}
}
return nullptr;
}
bool Transports::IsRestrictedPeer(const i2p::data::IdentHash & ih) const
{
{
std::unique_lock<std::mutex> l(m_TrustedRoutersMutex);
for (const auto & r : m_TrustedRouters )
if ( r == ih ) return true;
}
{
std::unique_lock<std::mutex> l(m_FamilyMutex);
auto ri = i2p::data::netdb.FindRouter(ih);
for (const auto & fam : m_TrustedFamilies)
if(ri->IsFamily(fam)) return true;
}
return false;
}
}
}

10
Transports.h
View file

@ -110,7 +110,11 @@ namespace transport
/** do we want to use restricted routes? */
bool RoutesRestricted() const;
/** restrict routes to use only these router families for first hops */
void RestrictRoutes(std::vector<std::string> families);
void RestrictRoutesToFamilies(std::set<std::string> families);
/** restrict routes to use only these routers for first hops */
void RestrictRoutesToRouters(std::set<i2p::data::IdentHash> routers);
bool IsRestrictedPeer(const i2p::data::IdentHash & ident) const;
void PeerTest ();
@ -158,6 +162,10 @@ namespace transport
std::vector<std::string> m_TrustedFamilies;
mutable std::mutex m_FamilyMutex;
/** which routers for first hop to trust */
std::vector<i2p::data::IdentHash> m_TrustedRouters;
mutable std::mutex m_TrustedRoutersMutex;
public:
// for HTTP only

8
Tunnel.cpp
View file

@ -644,7 +644,9 @@ namespace tunnel
{
// trying to create one more oubound tunnel
auto inboundTunnel = GetNextInboundTunnel ();
auto router = i2p::data::netdb.GetRandomRouter ();
auto router = i2p::transport::transports.RoutesRestricted() ?
i2p::transport::transports.GetRestrictedPeer() :
i2p::data::netdb.GetRandomRouter ();
if (!inboundTunnel || !router) return;
LogPrint (eLogDebug, "Tunnel: creating one hop outbound tunnel");
CreateTunnel<OutboundTunnel> (
@ -706,7 +708,9 @@ namespace tunnel
if (m_OutboundTunnels.empty () || m_InboundTunnels.size () < 5)
{
// trying to create one more inbound tunnel
auto router = i2p::data::netdb.GetRandomRouter ();
auto router = i2p::transport::transports.RoutesRestricted() ?
i2p::transport::transports.GetRestrictedPeer() :
i2p::data::netdb.GetRandomRouter ();
if (!router) {
LogPrint (eLogWarning, "Tunnel: can't find any router, skip creating tunnel");
return;