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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include "tls_crypto_socket.h"
#include <vespa/vespalib/net/socket_handle.h>
#include <vespa/vespalib/data/smart_buffer.h>
#include <vespa/vespalib/util/size_literals.h>
#include "crypto_codec.h"
namespace vespalib::net::tls {
/**
* Component adapting an underlying CryptoCodec to the CryptoSocket
* interface by performing buffer and socket management.
**/
class CryptoCodecAdapter : public TlsCryptoSocket
{
private:
SmartBuffer _input;
SmartBuffer _output;
SocketHandle _socket;
std::unique_ptr<CryptoCodec> _codec;
bool _got_tls_close;
bool _encoded_tls_close;
bool is_blocked(ssize_t res, int error) const {
return ((res < 0) && ((error == EWOULDBLOCK) || (error == EAGAIN)));
}
HandshakeResult hs_try_flush();
HandshakeResult hs_try_fill();
ssize_t fill_input(); // -1/0/1 -> error/eof/ok
ssize_t flush_all(); // -1/0 -> error/ok
public:
CryptoCodecAdapter(SocketHandle socket, std::unique_ptr<CryptoCodec> codec)
: _input(0), _output(0), _socket(std::move(socket)), _codec(std::move(codec)),
_got_tls_close(false), _encoded_tls_close(false) {}
void inject_read_data(const char *buf, size_t len) override;
int get_fd() const override { return _socket.get(); }
HandshakeResult handshake() override;
void do_handshake_work() override;
size_t min_read_buffer_size() const override { return _codec->min_decode_buffer_size(); }
ssize_t read(char *buf, size_t len) override;
ssize_t drain(char *, size_t) override;
ssize_t write(const char *buf, size_t len) override;
ssize_t flush() override;
ssize_t half_close() override;
void drop_empty_buffers() override;
std::unique_ptr<net::ConnectionAuthContext> make_auth_context() override;
};
} // namespace vespalib::net::tls
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