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@ -13,6 +13,7 @@
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#include "Log.h"
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#include "Log.h"
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#include "Timestamp.h"
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#include "Timestamp.h"
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#include "LeaseSet.h"
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#include "LeaseSet.h"
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#include "ClientContext.h"
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#include "I2CP.h"
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#include "I2CP.h"
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namespace i2p
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namespace i2p
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@ -20,8 +21,8 @@ namespace i2p
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namespace client
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namespace client
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{
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{
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I2CPDestination::I2CPDestination (I2CPSession& owner, std::shared_ptr<const i2p::data::IdentityEx> identity, bool isPublic):
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I2CPDestination::I2CPDestination (I2CPSession& owner, std::shared_ptr<const i2p::data::IdentityEx> identity, bool isPublic, const std::map<std::string, std::string>& params):
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LeaseSetDestination (isPublic), m_Owner (owner), m_Identity (identity)
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LeaseSetDestination (isPublic, ¶ms), m_Owner (owner), m_Identity (identity)
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{
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{
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}
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}
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@ -141,7 +142,7 @@ namespace client
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m_Socket->async_read_some (boost::asio::buffer (m_Buffer, 1),
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m_Socket->async_read_some (boost::asio::buffer (m_Buffer, 1),
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[s](const boost::system::error_code& ecode, std::size_t bytes_transferred)
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[s](const boost::system::error_code& ecode, std::size_t bytes_transferred)
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{
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{
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if (!ecode && bytes_transferred > 0 && s->m_Buffer[0] == I2CP_PRTOCOL_BYTE)
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if (!ecode && bytes_transferred > 0 && s->m_Buffer[0] == I2CP_PROTOCOL_BYTE)
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s->Receive ();
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s->Receive ();
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else
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else
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s->Terminate ();
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s->Terminate ();
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@ -253,6 +254,30 @@ namespace client
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return l + 1;
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return l + 1;
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}
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}
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void I2CPSession::ExtractMapping (const uint8_t * buf, size_t len, std::map<std::string, std::string>& mapping)
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// TODO: move to Base.cpp
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{
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size_t offset = 0;
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while (offset < len)
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{
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auto semicolon = (const uint8_t *)memchr (buf + offset, ';', len - offset);
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if (semicolon)
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{
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auto l = semicolon - buf - offset + 1;
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auto equal = (const uint8_t *)memchr (buf + offset, '=', l);
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if (equal)
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{
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auto l1 = equal - buf - offset + 1;
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mapping.insert (std::make_pair (std::string ((const char *)(buf + offset), l1 -1),
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std::string ((const char *)(buf + offset + l1), l - l1 - 2)));
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}
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offset += l;
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}
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else
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break;
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}
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}
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void I2CPSession::GetDateMessageHandler (const uint8_t * buf, size_t len)
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void I2CPSession::GetDateMessageHandler (const uint8_t * buf, size_t len)
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{
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{
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// get version
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// get version
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@ -274,12 +299,16 @@ namespace client
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size_t offset = identity->FromBuffer (buf, len);
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size_t offset = identity->FromBuffer (buf, len);
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uint16_t optionsSize = bufbe16toh (buf + offset);
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uint16_t optionsSize = bufbe16toh (buf + offset);
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offset += 2;
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offset += 2;
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// TODO: extract options
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std::map<std::string, std::string> params;
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ExtractMapping (buf + offset, optionsSize, params);
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offset += optionsSize;
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offset += optionsSize;
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offset += 8; // date
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offset += 8; // date
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if (identity->Verify (buf, offset, buf + offset)) // signature
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if (identity->Verify (buf, offset, buf + offset)) // signature
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{
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{
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m_Destination = std::make_shared<I2CPDestination>(*this, identity, false);
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bool isPublic = true;
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if (params[I2CP_PARAM_DONT_PUBLISH_LEASESET] == "true") isPublic = false;
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m_Destination = std::make_shared<I2CPDestination>(*this, identity, isPublic, params);
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m_Destination->Start ();
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m_Destination->Start ();
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SendSessionStatusMessage (1); // created
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SendSessionStatusMessage (1); // created
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LogPrint (eLogDebug, "I2CP: session ", m_SessionID, " created");
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LogPrint (eLogDebug, "I2CP: session ", m_SessionID, " created");
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@ -355,6 +384,11 @@ namespace client
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LogPrint (eLogError, "I2CP: unexpected sessionID ", sessionID);
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LogPrint (eLogError, "I2CP: unexpected sessionID ", sessionID);
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}
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}
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void I2CPSession::SendMessageExpiresMessageHandler (const uint8_t * buf, size_t len)
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{
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SendMessageMessageHandler (buf, len - 8); // ignore flags(2) and expiration(6)
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}
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void I2CPSession::HostLookupMessageHandler (const uint8_t * buf, size_t len)
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void I2CPSession::HostLookupMessageHandler (const uint8_t * buf, size_t len)
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{
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{
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uint16_t sessionID = bufbe16toh (buf);
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uint16_t sessionID = bufbe16toh (buf);
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@ -362,17 +396,38 @@ namespace client
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{
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{
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uint32_t requestID = bufbe32toh (buf + 2);
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uint32_t requestID = bufbe32toh (buf + 2);
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//uint32_t timeout = bufbe32toh (buf + 6);
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//uint32_t timeout = bufbe32toh (buf + 6);
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if (!buf[10]) // request type = 0 (hash)
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i2p::data::IdentHash ident;
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switch (buf[10])
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{
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{
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case 0: // hash
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ident = i2p::data::IdentHash (buf + 11);
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break;
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case 1: // address
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{
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auto name = ExtractString (buf + 11, len - 11);
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if (!i2p::client::context.GetAddressBook ().GetIdentHash (name, ident))
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{
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LogPrint (eLogError, "I2CP: address ", name, " not found");
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SendHostReplyMessage (requestID, nullptr);
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return;
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}
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break;
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}
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default:
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LogPrint (eLogError, "I2CP: request type ", (int)buf[10], " is not supported");
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SendHostReplyMessage (requestID, nullptr);
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return;
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}
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if (m_Destination)
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if (m_Destination)
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{
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{
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auto ls = m_Destination->FindLeaseSet (buf + 11);
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auto ls = m_Destination->FindLeaseSet (ident);
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if (ls)
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if (ls)
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SendHostReplyMessage (requestID, ls->GetIdentity ());
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SendHostReplyMessage (requestID, ls->GetIdentity ());
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else
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else
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{
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{
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auto s = shared_from_this ();
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auto s = shared_from_this ();
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m_Destination->RequestDestination (buf + 11,
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m_Destination->RequestDestination (ident,
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[s, requestID](std::shared_ptr<i2p::data::LeaseSet> leaseSet)
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[s, requestID](std::shared_ptr<i2p::data::LeaseSet> leaseSet)
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{
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{
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s->SendHostReplyMessage (requestID, leaseSet ? leaseSet->GetIdentity () : nullptr);
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s->SendHostReplyMessage (requestID, leaseSet ? leaseSet->GetIdentity () : nullptr);
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@ -382,12 +437,6 @@ namespace client
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else
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else
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SendHostReplyMessage (requestID, nullptr);
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SendHostReplyMessage (requestID, nullptr);
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}
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}
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else
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{
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LogPrint (eLogError, "I2CP: request type ", (int)buf[8], " is not supported");
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SendHostReplyMessage (requestID, nullptr);
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}
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}
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else
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else
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LogPrint (eLogError, "I2CP: unexpected sessionID ", sessionID);
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LogPrint (eLogError, "I2CP: unexpected sessionID ", sessionID);
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}
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}
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@ -415,6 +464,43 @@ namespace client
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}
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}
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}
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}
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void I2CPSession::DestLookupMessageHandler (const uint8_t * buf, size_t len)
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{
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if (m_Destination)
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{
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auto ls = m_Destination->FindLeaseSet (buf);
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if (ls)
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{
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auto l = ls->GetIdentity ()->GetFullLen ();
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uint8_t * identBuf = new uint8_t[l];
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ls->GetIdentity ()->ToBuffer (identBuf, l);
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SendI2CPMessage (I2CP_DEST_REPLY_MESSAGE, identBuf, l);
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delete[] identBuf;
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}
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else
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{
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auto s = shared_from_this ();
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i2p::data::IdentHash ident (buf);
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m_Destination->RequestDestination (ident,
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[s, ident](std::shared_ptr<i2p::data::LeaseSet> leaseSet)
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{
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if (leaseSet) // found
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{
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auto l = leaseSet->GetIdentity ()->GetFullLen ();
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uint8_t * identBuf = new uint8_t[l];
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leaseSet->GetIdentity ()->ToBuffer (identBuf, l);
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s->SendI2CPMessage (I2CP_DEST_REPLY_MESSAGE, identBuf, l);
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delete[] identBuf;
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}
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else
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s->SendI2CPMessage (I2CP_DEST_REPLY_MESSAGE, ident, 32); // not found
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});
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}
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}
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else
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SendI2CPMessage (I2CP_DEST_REPLY_MESSAGE, buf, 32);
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}
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void I2CPSession::SendMessagePayloadMessage (const uint8_t * payload, size_t len)
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void I2CPSession::SendMessagePayloadMessage (const uint8_t * payload, size_t len)
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{
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{
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// we don't use SendI2CPMessage to eliminate additional copy
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// we don't use SendI2CPMessage to eliminate additional copy
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@ -441,7 +527,9 @@ namespace client
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m_MessagesHandlers[I2CP_DESTROY_SESSION_MESSAGE] = &I2CPSession::DestroySessionMessageHandler;
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m_MessagesHandlers[I2CP_DESTROY_SESSION_MESSAGE] = &I2CPSession::DestroySessionMessageHandler;
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m_MessagesHandlers[I2CP_CREATE_LEASESET_MESSAGE] = &I2CPSession::CreateLeaseSetMessageHandler;
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m_MessagesHandlers[I2CP_CREATE_LEASESET_MESSAGE] = &I2CPSession::CreateLeaseSetMessageHandler;
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m_MessagesHandlers[I2CP_SEND_MESSAGE_MESSAGE] = &I2CPSession::SendMessageMessageHandler;
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m_MessagesHandlers[I2CP_SEND_MESSAGE_MESSAGE] = &I2CPSession::SendMessageMessageHandler;
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m_MessagesHandlers[I2CP_SEND_MESSAGE_EXPIRES_MESSAGE] = &I2CPSession::SendMessageExpiresMessageHandler;
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m_MessagesHandlers[I2CP_HOST_LOOKUP_MESSAGE] = &I2CPSession::HostLookupMessageHandler;
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m_MessagesHandlers[I2CP_HOST_LOOKUP_MESSAGE] = &I2CPSession::HostLookupMessageHandler;
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m_MessagesHandlers[I2CP_DEST_LOOKUP_MESSAGE] = &I2CPSession::DestLookupMessageHandler;
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}
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}
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I2CPServer::~I2CPServer ()
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I2CPServer::~I2CPServer ()
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