void cb_downloadStart(AuthServer_Private& client)
{
START_REPLY(e_AuthToCli_FileDownloadChunk);
// Trans ID
uint32_t transId = DS::CryptRecvValue<uint32_t>(client.m_sock, client.m_crypt);
client.m_buffer.write<uint32_t>(transId);
// Download filename
DS::String filename = DS::CryptRecvString(client.m_sock, client.m_crypt);
// Ensure filename is jailed to our data path
if (filename.find("..") != -1) {
client.m_buffer.write<uint32_t>(DS::e_NetFileNotFound);
client.m_buffer.write<uint32_t>(0); // File size
client.m_buffer.write<uint32_t>(0); // Chunk offset
client.m_buffer.write<uint32_t>(0); // Data packet size
SEND_REPLY();
return;
}
filename.replace("\\", "/");
filename = DS::Settings::AuthRoot() + filename;
DS::FileStream* stream = new DS::FileStream();
try {
stream->open(filename.c_str(), "rb");
} catch (const DS::FileIOException& ex) {
fprintf(stderr, "[Auth] Could not open file %s: %s\n[Auth] Requested by %s\n",
filename.c_str(), ex.what(), DS::SockIpAddress(client.m_sock).c_str());
client.m_buffer.write<uint32_t>(DS::e_NetFileNotFound);
client.m_buffer.write<uint32_t>(0); // File size
client.m_buffer.write<uint32_t>(0); // Chunk offset
client.m_buffer.write<uint32_t>(0); // Data packet size
SEND_REPLY();
delete stream;
return;
}
client.m_buffer.write<uint32_t>(DS::e_NetSuccess);
client.m_buffer.write<uint32_t>(stream->size());
client.m_buffer.write<uint32_t>(stream->tell());
uint8_t data[CHUNK_SIZE];
if (stream->size() > CHUNK_SIZE) {
client.m_buffer.write<uint32_t>(CHUNK_SIZE);
stream->readBytes(data, CHUNK_SIZE);
client.m_buffer.writeBytes(data, CHUNK_SIZE);
client.m_downloads[transId] = stream;
} else {
client.m_buffer.write<uint32_t>(stream->size());
stream->readBytes(data, stream->size());
client.m_buffer.writeBytes(data, stream->size());
delete stream;
}
SEND_REPLY();
}
