Esempio n. 1
0
	I2NPMessage * CreateDatabaseStoreMsg (const i2p::data::RouterInfo * router)
	{
		if (!router) // we send own RouterInfo
			router = &context.GetRouterInfo ();

		I2NPMessage * m = NewI2NPShortMessage ();
		I2NPDatabaseStoreMsg * msg = (I2NPDatabaseStoreMsg *)m->GetPayload ();		

		memcpy (msg->key, router->GetIdentHash (), 32);
		msg->type = 0;
		msg->replyToken = 0;
		
		CryptoPP::Gzip compressor;
		compressor.Put (router->GetBuffer (), router->GetBufferLen ());
		compressor.MessageEnd();
		auto size = compressor.MaxRetrievable ();
		uint8_t * buf = m->GetPayload () + sizeof (I2NPDatabaseStoreMsg);
		*(uint16_t *)buf = htobe16 (size); // size
		buf += 2;
		// TODO: check if size doesn't exceed buffer
		compressor.Get (buf, size); 
		m->len += sizeof (I2NPDatabaseStoreMsg) + 2 + size; // payload size
		FillI2NPMessageHeader (m, eI2NPDatabaseStore);
		
		return m;
	}	
Esempio n. 2
0
 Data Gzip::Compress(const Data &data) {
     CryptoPP::Gzip zipper;
     zipper.Put((byte *) data.data(), data.size());
     zipper.MessageEnd();
     Data compressed(zipper.MaxRetrievable());
     zipper.Get((byte *) compressed.data(), compressed.size());
     return compressed;
 }
Esempio n. 3
0
	I2NPMessage * DatagramDestination::CreateDataMessage (const uint8_t * payload, size_t len)
	{
		I2NPMessage * msg = NewI2NPMessage ();
		CryptoPP::Gzip compressor; // default level
		compressor.Put (payload, len);
		compressor.MessageEnd();
		int size = compressor.MaxRetrievable ();
		uint8_t * buf = msg->GetPayload ();
		*(uint32_t *)buf = htobe32 (size); // length
		buf += 4;
		compressor.Get (buf, size);
		memset (buf + 4, 0, 4); // source and destination are zeroes
		buf[9] = i2p::client::PROTOCOL_TYPE_DATAGRAM; // datagram protocol
		msg->len += size + 4; 
		FillI2NPMessageHeader (msg, eI2NPData);
		return msg;
	}	
Esempio n. 4
0
	I2NPMessage * DatagramDestination::CreateDataMessage (const uint8_t * payload, size_t len, uint16_t fromPort, uint16_t toPort)
	{
		I2NPMessage * msg = NewI2NPMessage ();
		CryptoPP::Gzip compressor; // default level
		compressor.Put (payload, len);
		compressor.MessageEnd();
		int size = compressor.MaxRetrievable ();
		uint8_t * buf = msg->GetPayload ();
		htobe32buf (buf, size); // length
		buf += 4;
		compressor.Get (buf, size);
		htobe16buf (buf + 4, fromPort); // source port
		htobe16buf (buf + 6, toPort); // destination port 
		buf[9] = i2p::client::PROTOCOL_TYPE_DATAGRAM; // datagram protocol
		msg->len += size + 4; 
		FillI2NPMessageHeader (msg, eI2NPData);
		return msg;
	}