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eliminate extra copy of RouterInfo

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orignal 2018-12-04 12:56:49 -05:00
parent f30b6c9e6e
commit 8f6f95211e
1 changed files with 21 additions and 9 deletions
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30
libi2pd/NTCP2.cpp
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@ -980,9 +980,12 @@ namespace transport
// if it's long enough we add padding and MAC to it
// create padding block
auto paddingLen = CreatePaddingBlock (totalLen, buf + len, it->maxLen - it->len - 16);
encryptBufs.push_back (std::make_pair (buf + len, paddingLen));
len += paddingLen;
totalLen += paddingLen;
if (paddingLen)
{
encryptBufs.push_back (std::make_pair (buf + len, paddingLen));
len += paddingLen;
totalLen += paddingLen;
}
macBuf = buf + len;
// allocate 16 bytes for MAC
len += 16;
@ -998,7 +1001,8 @@ namespace transport
// crate padding block
auto paddingLen = CreatePaddingBlock (totalLen, m_NextSendBuffer, 287 - 16);
// and padding block to encrypt and send
encryptBufs.push_back (std::make_pair (m_NextSendBuffer, paddingLen));
if (paddingLen)
encryptBufs.push_back (std::make_pair (m_NextSendBuffer, paddingLen));
bufs.push_back (boost::asio::buffer (m_NextSendBuffer, paddingLen + 16));
macBuf = m_NextSendBuffer + paddingLen;
totalLen += paddingLen;
@ -1067,17 +1071,25 @@ namespace transport
if (!IsEstablished ()) return;
auto riLen = i2p::context.GetRouterInfo ().GetBufferLen ();
int paddingSize = (riLen*NTCP2_MAX_PADDING_RATIO)/100;
size_t payloadLen = riLen + paddingSize + 7; // 7 = 2*3 bytes header + 1 byte RI flag
uint8_t * payload = new uint8_t[payloadLen];
size_t payloadLen = riLen + paddingSize + 7; // 7 = 2*3 bytes header + 1 byte RI flag
m_NextSendBuffer = new uint8_t[payloadLen + 16 + 2];
uint8_t * payload = m_NextSendBuffer + 2;
payload[0] = eNTCP2BlkRouterInfo;
htobe16buf (payload + 1, riLen + 1); // size
payload[3] = 0; // flag
memcpy (payload + 4, i2p::context.GetRouterInfo ().GetBuffer (), riLen);
payload[riLen + 4] = eNTCP2BlkPadding;
htobe16buf (payload + riLen + 5, paddingSize);
RAND_bytes (payload + riLen + 7, paddingSize);
SendNextFrame (payload, payloadLen);
delete[] payload;
memset (payload + riLen + 7, 0, paddingSize);
// encrypt
uint8_t nonce[12];
CreateNonce (m_SendSequenceNumber, nonce); m_SendSequenceNumber++;
i2p::crypto::AEADChaCha20Poly1305Encrypt ({std::make_pair (payload, payloadLen)}, m_SendKey, nonce, payload + payloadLen);
SetNextSentFrameLength (payloadLen + 16, m_NextSendBuffer);
// send
m_IsSending = true;
boost::asio::async_write (m_Socket, boost::asio::buffer (m_NextSendBuffer, payloadLen + 16 + 2), boost::asio::transfer_all (),
std::bind(&NTCP2Session::HandleNextFrameSent, shared_from_this (), std::placeholders::_1, std::placeholders::_2));
}
void NTCP2Session::SendTermination (NTCP2TerminationReason reason)