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don't copy datagram payload

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orignal 2020-05-17 16:49:31 -04:00
parent 0b1cfb2102
commit 329439d0ae
4 changed files with 52 additions and 17 deletions
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30
libi2pd/Gzip.cpp
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@ -116,6 +116,36 @@ namespace data
return 0;
}
size_t GzipDeflator::Deflate (const std::vector<std::pair<const uint8_t *, size_t> >& bufs, uint8_t * out, size_t outLen)
{
if (m_IsDirty) deflateReset (&m_Deflator);
m_IsDirty = true;
size_t offset = 0;
int err;
for (const auto& it: bufs)
{
m_Deflator.next_in = const_cast<uint8_t *>(it.first);
m_Deflator.avail_in = it.second;
m_Deflator.next_out = out + offset;
m_Deflator.avail_out = outLen - offset;
auto flush = (it == bufs.back ()) ? Z_FINISH : Z_NO_FLUSH;
err = deflate (&m_Deflator, flush);
if (err)
{
if (flush && err == Z_STREAM_END)
{
out[9] = 0xff; // OS is always unknown
return outLen - m_Deflator.avail_out;
}
break;
}
offset = outLen - m_Deflator.avail_out;
}
// else
LogPrint (eLogError, "Gzip: Deflate error ", err);
return 0;
}
size_t GzipNoCompression (const uint8_t * in, uint16_t inLen, uint8_t * out, size_t outLen)
{
static const uint8_t gzipHeader[11] = { 0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x04, 0xff, 0x01 };