void HandleVariableTunnelBuildMsg (uint32_t replyMsgID, uint8_t * buf, size_t len)
{
int num = buf[0];
LogPrint (eLogDebug, "I2NP: VariableTunnelBuild ", num, " records");
if (len < num*BUILD_REQUEST_RECORD_CLEAR_TEXT_SIZE + 1)
{
LogPrint (eLogError, "VaribleTunnelBuild message of ", num, " records is too short ", len);
return;
}
auto tunnel = i2p::tunnel::tunnels.GetPendingInboundTunnel (replyMsgID);
if (tunnel)
{
// endpoint of inbound tunnel
LogPrint (eLogDebug, "I2NP: VariableTunnelBuild reply for tunnel ", tunnel->GetTunnelID ());
if (tunnel->HandleTunnelBuildResponse (buf, len))
{
LogPrint (eLogInfo, "I2NP: Inbound tunnel ", tunnel->GetTunnelID (), " has been created");
tunnel->SetState (i2p::tunnel::eTunnelStateEstablished);
i2p::tunnel::tunnels.AddInboundTunnel (tunnel);
}
else
{
LogPrint (eLogInfo, "I2NP: Inbound tunnel ", tunnel->GetTunnelID (), " has been declined");
tunnel->SetState (i2p::tunnel::eTunnelStateBuildFailed);
}
}
else
{
uint8_t clearText[BUILD_REQUEST_RECORD_CLEAR_TEXT_SIZE];
if (HandleBuildRequestRecords (num, buf + 1, clearText))
{
if (clearText[BUILD_REQUEST_RECORD_FLAG_OFFSET] & 0x40) // we are endpoint of outboud tunnel
{
// so we send it to reply tunnel
transports.SendMessage (clearText + BUILD_REQUEST_RECORD_NEXT_IDENT_OFFSET,
CreateTunnelGatewayMsg (bufbe32toh (clearText + BUILD_REQUEST_RECORD_NEXT_TUNNEL_OFFSET),
eI2NPVariableTunnelBuildReply, buf, len,
bufbe32toh (clearText + BUILD_REQUEST_RECORD_SEND_MSG_ID_OFFSET)));
}
else
transports.SendMessage (clearText + BUILD_REQUEST_RECORD_NEXT_IDENT_OFFSET,
CreateI2NPMessage (eI2NPVariableTunnelBuild, buf, len,
bufbe32toh (clearText + BUILD_REQUEST_RECORD_SEND_MSG_ID_OFFSET)));
}
}
}
std::shared_ptr<I2NPMessage> CreateTunnelGatewayMsg (uint32_t tunnelID, std::shared_ptr<I2NPMessage> msg)
{
if (msg->offset >= I2NP_HEADER_SIZE + TUNNEL_GATEWAY_HEADER_SIZE)
{
// message is capable to be used without copying
uint8_t * payload = msg->GetBuffer () - TUNNEL_GATEWAY_HEADER_SIZE;
htobe32buf (payload + TUNNEL_GATEWAY_HEADER_TUNNELID_OFFSET, tunnelID);
int len = msg->GetLength ();
htobe16buf (payload + TUNNEL_GATEWAY_HEADER_LENGTH_OFFSET, len);
msg->offset -= (I2NP_HEADER_SIZE + TUNNEL_GATEWAY_HEADER_SIZE);
msg->len = msg->offset + I2NP_HEADER_SIZE + TUNNEL_GATEWAY_HEADER_SIZE +len;
msg->FillI2NPMessageHeader (eI2NPTunnelGateway);
return msg;
}
else
return CreateTunnelGatewayMsg (tunnelID, msg->GetBuffer (), msg->GetLength ());
}
void HandleTunnelBuildMsg (uint8_t * buf, size_t len)
{
I2NPBuildRequestRecordClearText clearText;
if (HandleBuildRequestRecords (NUM_TUNNEL_BUILD_RECORDS, (I2NPBuildRequestRecordElGamalEncrypted *)buf, clearText))
{
if (clearText.flag & 0x40) // we are endpoint of outbound tunnel
{
// so we send it to reply tunnel
transports.SendMessage (clearText.nextIdent,
CreateTunnelGatewayMsg (be32toh (clearText.nextTunnel),
eI2NPTunnelBuildReply, buf, len,
be32toh (clearText.nextMessageID)));
}
else
transports.SendMessage (clearText.nextIdent,
CreateI2NPMessage (eI2NPTunnelBuild, buf, len, be32toh (clearText.nextMessageID)));
}
}
void HandleVariableTunnelBuildMsg (uint32_t replyMsgID, uint8_t * buf, size_t len)
{
int num = buf[0];
LogPrint ("VariableTunnelBuild ", num, " records");
i2p::tunnel::Tunnel * tunnel = i2p::tunnel::tunnels.GetPendingTunnel (replyMsgID);
if (tunnel)
{
// endpoint of inbound tunnel
LogPrint ("VariableTunnelBuild reply for tunnel ", tunnel->GetTunnelID ());
if (tunnel->HandleTunnelBuildResponse (buf, len))
{
LogPrint ("Inbound tunnel ", tunnel->GetTunnelID (), " has been created");
tunnel->SetState (i2p::tunnel::eTunnelStateEstablished);
i2p::tunnel::tunnels.AddInboundTunnel (static_cast<i2p::tunnel::InboundTunnel *>(tunnel));
}
else
{
LogPrint ("Inbound tunnel ", tunnel->GetTunnelID (), " has been declined");
tunnel->SetState (i2p::tunnel::eTunnelStateBuildFailed);
}
}
else
{
I2NPBuildRequestRecordElGamalEncrypted * records = (I2NPBuildRequestRecordElGamalEncrypted *)(buf+1);
I2NPBuildRequestRecordClearText clearText;
if (HandleBuildRequestRecords (num, records, clearText))
{
if (clearText.flag & 0x40) // we are endpoint of outboud tunnel
{
// so we send it to reply tunnel
transports.SendMessage (clearText.nextIdent,
CreateTunnelGatewayMsg (be32toh (clearText.nextTunnel),
eI2NPVariableTunnelBuildReply, buf, len,
be32toh (clearText.nextMessageID)));
}
else
transports.SendMessage (clearText.nextIdent,
CreateI2NPMessage (eI2NPVariableTunnelBuild, buf, len, be32toh (clearText.nextMessageID)));
}
}
}
I2NPMessage * CreateTunnelGatewayMsg (uint32_t tunnelID, I2NPMessage * msg)
{
if (msg->offset >= sizeof (I2NPHeader) + sizeof (TunnelGatewayHeader))
{
// message is capable to be used without copying
TunnelGatewayHeader * header = (TunnelGatewayHeader *)(msg->GetBuffer () - sizeof (TunnelGatewayHeader));
header->tunnelID = htobe32 (tunnelID);
int len = msg->GetLength ();
header->length = htobe16 (len);
msg->offset -= (sizeof (I2NPHeader) + sizeof (TunnelGatewayHeader));
msg->len = msg->offset + sizeof (I2NPHeader) + sizeof (TunnelGatewayHeader) +len;
FillI2NPMessageHeader (msg, eI2NPTunnelGateway);
return msg;
}
else
{
I2NPMessage * msg1 = CreateTunnelGatewayMsg (tunnelID, msg->GetBuffer (), msg->GetLength ());
DeleteI2NPMessage (msg);
return msg1;
}
}
void HandleTunnelBuildMsg (uint8_t * buf, size_t len)
{
if (len < NUM_TUNNEL_BUILD_RECORDS*BUILD_REQUEST_RECORD_CLEAR_TEXT_SIZE)
{
LogPrint (eLogError, "TunnelBuild message is too short ", len);
return;
}
uint8_t clearText[BUILD_REQUEST_RECORD_CLEAR_TEXT_SIZE];
if (HandleBuildRequestRecords (NUM_TUNNEL_BUILD_RECORDS, buf, clearText))
{
if (clearText[BUILD_REQUEST_RECORD_FLAG_OFFSET] & 0x40) // we are endpoint of outbound tunnel
{
// so we send it to reply tunnel
transports.SendMessage (clearText + BUILD_REQUEST_RECORD_NEXT_IDENT_OFFSET,
CreateTunnelGatewayMsg (bufbe32toh (clearText + BUILD_REQUEST_RECORD_NEXT_TUNNEL_OFFSET),
eI2NPTunnelBuildReply, buf, len,
bufbe32toh (clearText + BUILD_REQUEST_RECORD_SEND_MSG_ID_OFFSET)));
}
else
transports.SendMessage (clearText + BUILD_REQUEST_RECORD_NEXT_IDENT_OFFSET,
CreateI2NPMessage (eI2NPTunnelBuild, buf, len,
bufbe32toh (clearText + BUILD_REQUEST_RECORD_SEND_MSG_ID_OFFSET)));
}
}
