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@ -202,59 +202,68 @@ namespace stream
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size_t Stream::Send (const uint8_t * buf, size_t len, int timeout)
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size_t Stream::Send (const uint8_t * buf, size_t len, int timeout)
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{
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{
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bool isNoAck = m_LastReceivedSequenceNumber < 0; // first packet
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bool isNoAck = m_LastReceivedSequenceNumber < 0; // first packet
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Packet * p = new Packet ();
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while (len > 0)
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uint8_t * packet = p->GetBuffer ();
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// TODO: implement setters
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size_t size = 0;
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*(uint32_t *)(packet + size) = htobe32 (m_SendStreamID);
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size += 4; // sendStreamID
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*(uint32_t *)(packet + size) = htobe32 (m_RecvStreamID);
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size += 4; // receiveStreamID
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*(uint32_t *)(packet + size) = htobe32 (m_SequenceNumber++);
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size += 4; // sequenceNum
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if (isNoAck)
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*(uint32_t *)(packet + size) = htobe32 (m_LastReceivedSequenceNumber);
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else
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*(uint32_t *)(packet + size) = 0;
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size += 4; // ack Through
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packet[size] = 0;
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size++; // NACK count
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size++; // resend delay
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if (!m_IsOpen)
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{
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// initial packet
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m_IsOpen = true;
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uint16_t flags = PACKET_FLAG_SYNCHRONIZE | PACKET_FLAG_FROM_INCLUDED |
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PACKET_FLAG_SIGNATURE_INCLUDED | PACKET_FLAG_MAX_PACKET_SIZE_INCLUDED;
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if (isNoAck) flags |= PACKET_FLAG_NO_ACK;
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*(uint16_t *)(packet + size) = htobe16 (flags);
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size += 2; // flags
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*(uint16_t *)(packet + size) = htobe16 (i2p::data::DEFAULT_IDENTITY_SIZE + 40 + 2); // identity + signature + packet size
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size += 2; // options size
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memcpy (packet + size, &m_LocalDestination->GetIdentity (), i2p::data::DEFAULT_IDENTITY_SIZE);
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size += i2p::data::DEFAULT_IDENTITY_SIZE; // from
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*(uint16_t *)(packet + size) = htobe16 (STREAMING_MTU);
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size += 2; // max packet size
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uint8_t * signature = packet + size; // set it later
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memset (signature, 0, 40); // zeroes for now
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size += 40; // signature
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memcpy (packet + size, buf, len);
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size += len; // payload
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m_LocalDestination->Sign (packet, size, signature);
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}
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else
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{
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{
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// follow on packet
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Packet * p = new Packet ();
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*(uint16_t *)(packet + size) = 0;
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uint8_t * packet = p->GetBuffer ();
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size += 2; // flags
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// TODO: implement setters
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*(uint16_t *)(packet + size) = 0; // no options
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size_t size = 0;
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size += 2; // options size
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*(uint32_t *)(packet + size) = htobe32 (m_SendStreamID);
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memcpy (packet + size, buf, len);
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size += 4; // sendStreamID
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size += len; // payload
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*(uint32_t *)(packet + size) = htobe32 (m_RecvStreamID);
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}
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size += 4; // receiveStreamID
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p->len = size;
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*(uint32_t *)(packet + size) = htobe32 (m_SequenceNumber++);
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m_Service.post (boost::bind (&Stream::SendPacket, this, p));
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size += 4; // sequenceNum
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if (isNoAck)
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*(uint32_t *)(packet + size) = htobe32 (m_LastReceivedSequenceNumber);
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else
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*(uint32_t *)(packet + size) = 0;
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size += 4; // ack Through
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packet[size] = 0;
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size++; // NACK count
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size++; // resend delay
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if (!m_IsOpen)
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{
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// initial packet
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m_IsOpen = true;
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uint16_t flags = PACKET_FLAG_SYNCHRONIZE | PACKET_FLAG_FROM_INCLUDED |
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PACKET_FLAG_SIGNATURE_INCLUDED | PACKET_FLAG_MAX_PACKET_SIZE_INCLUDED;
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if (isNoAck) flags |= PACKET_FLAG_NO_ACK;
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*(uint16_t *)(packet + size) = htobe16 (flags);
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size += 2; // flags
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*(uint16_t *)(packet + size) = htobe16 (i2p::data::DEFAULT_IDENTITY_SIZE + 40 + 2); // identity + signature + packet size
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size += 2; // options size
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memcpy (packet + size, &m_LocalDestination->GetIdentity (), i2p::data::DEFAULT_IDENTITY_SIZE);
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size += i2p::data::DEFAULT_IDENTITY_SIZE; // from
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*(uint16_t *)(packet + size) = htobe16 (STREAMING_MTU);
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size += 2; // max packet size
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uint8_t * signature = packet + size; // set it later
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memset (signature, 0, 40); // zeroes for now
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size += 40; // signature
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size_t sentLen = STREAMING_MTU - size;
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if (len < sentLen) sentLen = len;
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memcpy (packet + size, buf, sentLen);
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len -= sentLen;
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size += sentLen; // payload
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m_LocalDestination->Sign (packet, size, signature);
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}
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else
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{
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// follow on packet
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*(uint16_t *)(packet + size) = 0;
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size += 2; // flags
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*(uint16_t *)(packet + size) = 0; // no options
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size += 2; // options size
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size_t sentLen = STREAMING_MTU - size;
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if (len < sentLen) sentLen = len;
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memcpy (packet + size, buf, sentLen);
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len -= sentLen;
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size += sentLen; // payload
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}
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p->len = size;
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m_Service.post (boost::bind (&Stream::SendPacket, this, p));
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}
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return len;
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return len;
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}
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}
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