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/*
* Copyright (c) 2020-2023 One Identity LLC.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* As an additional exemption you are allowed to compile & link against the
* OpenSSL libraries as published by the OpenSSL project. See the file
* COPYING for details.
*
*/
#ifndef TRANSPORT_SOCKET_PROXY_H_INCLUDED
#define TRANSPORT_SOCKET_PROXY_H_INCLUDED
#include "logtransport.h"
#define IP_BUF_SIZE 64
/* This class implements: https://www.haproxy.org/download/1.8/doc/proxy-protocol.txt */
/* the size of the buffer we use to fetch the PROXY header into */
#define PROXY_PROTO_HDR_BUFFER_SIZE 1500
typedef struct _LogTransportSocketProxy LogTransportSocketProxy;
struct _LogTransportSocketProxy
{
LogTransport *base_transport;
gssize (*base_read)(LogTransport *self, gpointer buf, gsize count, LogTransportAuxData *aux);
gssize (*base_write)(LogTransport *self, const gpointer buf, gsize count);
gboolean should_switch_transport;
/* Info received from the proxy that should be added as LogTransportAuxData to
* any message received through this server instance. */
struct
{
gboolean unknown;
gchar src_ip[IP_BUF_SIZE];
gchar dst_ip[IP_BUF_SIZE];
int ip_version;
int src_port;
int dst_port;
} info;
/* Flag to only process proxy header once */
gboolean proxy_header_processed;
enum
{
LPPTS_INITIAL,
LPPTS_DETERMINE_VERSION,
LPPTS_PROXY_V1_READ_LINE,
LPPTS_PROXY_V2_READ_HEADER,
LPPTS_PROXY_V2_READ_PAYLOAD,
} header_fetch_state;
/* 0 unknown, 1 or 2 indicate proxy header version */
gint proxy_header_version;
guchar proxy_header_buff[PROXY_PROTO_HDR_BUFFER_SIZE];
gsize proxy_header_buff_len;
};
LogTransportSocketProxy *log_transport_socket_proxy_new(LogTransport *base_transport, gboolean is_multi);
void log_transport_socket_proxy_free(LogTransportSocketProxy *self);
#endif
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