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/*
* Copyright (c) 2002-2012 Balabit
* Copyright (c) 1998-2012 Balázs Scheidler
*
* 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.
*
*/
#include "logproto-record-server.h"
#include "logproto-buffered-server.h"
#include "messages.h"
#include <errno.h>
/* proto that reads the stream in even sized chunks */
typedef struct _LogProtoRecordServer LogProtoRecordServer;
struct _LogProtoRecordServer
{
LogProtoBufferedServer super;
gint record_size;
};
static gboolean
log_proto_record_server_validate_options(LogProtoServer *s)
{
LogProtoRecordServer *self = (LogProtoRecordServer *) s;
if (s->options->max_buffer_size < self->record_size)
{
msg_error("Buffer is too small to hold the number of bytes required for a record, please make sure log-msg-size() is greater than equal to record-size",
evt_tag_int("record_size", self->record_size),
evt_tag_int("max_buffer_size", s->options->max_buffer_size));
return FALSE;
}
return log_proto_buffered_server_validate_options_method(s);
}
static gint
log_proto_record_server_read_data(LogProtoBufferedServer *s, guchar *buf, gsize len, LogTransportAuxData *aux)
{
LogProtoRecordServer *self = (LogProtoRecordServer *) s;
gint rc;
/* assert that we have enough space in the buffer to read record_size bytes */
g_assert(len >= self->record_size);
len = self->record_size;
rc = log_transport_read(self->super.super.transport, buf, len, aux);
if (rc > 0 && rc != self->record_size)
{
msg_error("Record size was set, and couldn't read enough bytes",
evt_tag_int(EVT_TAG_FD, self->super.super.transport->fd),
evt_tag_int("record_size", self->record_size),
evt_tag_int("read", rc));
errno = EIO;
return -1;
}
return rc;
}
static void
log_proto_record_server_init(LogProtoRecordServer *self, LogTransport *transport, const LogProtoServerOptions *options,
gint record_size)
{
log_proto_buffered_server_init(&self->super, transport, options);
self->super.super.validate_options = log_proto_record_server_validate_options;
self->super.read_data = log_proto_record_server_read_data;
self->super.stream_based = FALSE;
self->record_size = record_size;
}
static gboolean
log_proto_binary_record_server_fetch_from_buffer(LogProtoBufferedServer *s, const guchar *buffer_start,
gsize buffer_bytes, const guchar **msg, gsize *msg_len)
{
LogProtoBufferedServerState *state = log_proto_buffered_server_get_state(s);
*msg_len = buffer_bytes;
state->pending_buffer_pos = state->pending_buffer_end;
*msg = buffer_start;
log_proto_buffered_server_put_state(s);
return TRUE;
}
LogProtoServer *
log_proto_binary_record_server_new(LogTransport *transport, const LogProtoServerOptions *options, gint record_size)
{
LogProtoRecordServer *self = g_new0(LogProtoRecordServer, 1);
log_proto_record_server_init(self, transport, options, record_size);
self->super.fetch_from_buffer = log_proto_binary_record_server_fetch_from_buffer;
return &self->super.super;
}
static gboolean
log_proto_padded_record_server_fetch_from_buffer(LogProtoBufferedServer *s, const guchar *buffer_start,
gsize buffer_bytes, const guchar **msg, gsize *msg_len)
{
LogProtoBufferedServerState *state = log_proto_buffered_server_get_state(s);
const guchar *eol;
eol = find_eom(buffer_start, buffer_bytes);
*msg_len = (eol ? eol - buffer_start : buffer_bytes);
state->pending_buffer_pos = state->pending_buffer_end;
*msg = buffer_start;
log_proto_buffered_server_put_state(s);
return TRUE;
}
LogProtoServer *
log_proto_padded_record_server_new(LogTransport *transport, const LogProtoServerOptions *options, gint record_size)
{
LogProtoRecordServer *self = g_new0(LogProtoRecordServer, 1);
log_proto_record_server_init(self, transport, options, record_size);
self->super.fetch_from_buffer = log_proto_padded_record_server_fetch_from_buffer;
return &self->super.super;
}
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