appneta/tcpreplay

/* $Id$ */

/*
 *   Copyright (c) 2001-2010 Aaron Turner <aturner at synfin dot net>
 *   Copyright (c) 2013-2022 Fred Klassen <tcpreplay at appneta dot com> - AppNeta
 *
 *   The Tcpreplay Suite of tools is free software: you can redistribute it
 *   and/or modify it under the terms of the GNU General Public License as
 *   published by the Free Software Foundation, either version 3 of the
 *   License, or with the authors permission any later version.
 *
 *   The Tcpreplay Suite 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 General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with the Tcpreplay Suite.  If not, see <http://www.gnu.org/licenses/>.
 */

#pragma once

#include "plugins_types.h"

#ifdef __cplusplus
extern "C" {
#endif

/* Used to parse arguments if you have AutoGen */
int tcpedit_dlt_post_args(tcpedit_t *tcpedit);

/*
 * initialize the DLT plugin backend, and return a new context var.
 * call this once per pcap to be processed
 */
tcpeditdlt_t *tcpedit_dlt_init(tcpedit_t *tcpedit, int srcdlt);

/*
 * Called after tcpedit_dlt_post_args() to allow plugins to do special things
 * like init sub-plugins.  You'll need to call this manual if you're not using
 * tcpedit_dlt_post_args();
 */
int tcpedit_dlt_post_init(tcpeditdlt_t *tcpedit);

/* cleans up after ourselves.  Called for each initialized plugin */
void tcpedit_dlt_cleanup(tcpeditdlt_t *ctx);

/* What is the output DLT type? */
int tcpedit_dlt_output_dlt(tcpeditdlt_t *ctx);
int tcpedit_dlt_l2len(tcpeditdlt_t *ctx, int dlt, const u_char *packet, const int pktlen);

/*
 * process the given packet, by calling decode & encode
 */
int tcpedit_dlt_process(tcpeditdlt_t *ctx, u_char **packet, int pktlen, tcpr_dir_t direction);

/*
 * or you can call them sperately if you want
 */
int tcpedit_dlt_decode(tcpeditdlt_t *ctx, const u_char *packet, const int pktlen);
int tcpedit_dlt_encode(tcpeditdlt_t *ctx, u_char *packet, int pktlen, tcpr_dir_t direction);

/*
 * After processing each packet, you can get info about L2/L3
 */
int tcpedit_dlt_proto(tcpeditdlt_t *ctx, int dlt, const u_char *packet, const int pktlen);
u_char *tcpedit_dlt_l3data(tcpeditdlt_t *ctx, int dlt, u_char *packet, const int pktlen);

/* merge the L2 & L3 (possibly changed?) after calling tcpedit_dlt_l3data() */
u_char *tcpedit_dlt_merge_l3data(tcpeditdlt_t *ctx,
                                 int dlt,
                                 u_char *packet,
                                 const int pktlen,
                                 u_char *ipv4_data,
                                 u_char *ipv6_data);

int tcpedit_dlt_src(tcpeditdlt_t *ctx);
int tcpedit_dlt_dst(tcpeditdlt_t *ctx);

#ifdef __cplusplus
}
#endif