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/*
* Author Jerry Lundström <jerry@dns-oarc.net>
* Copyright (c) 2016-2017, OARC, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include "pcap_thread.h"
#ifndef __pcap_thread_ext_frag_h
#define __pcap_thread_ext_frag_h
#ifdef __cplusplus
extern "C" {
#endif
/*
* RFC791 - Handle fragments in an offset ascending order, allow fragments to overlap
* RFC815 - Handle fragments in a receiving order, allow fragments to overlap
* BSD - Handle fragments in an offset descending order, allow fragments to overlap
*/
typedef enum pcap_thread_ext_frag_reassemble_mode pcap_thread_ext_frag_reassemble_mode_t;
enum pcap_thread_ext_frag_reassemble_mode {
PCAP_THREAD_EXT_FRAG_REASSEMBLE_RFC791 = 0,
PCAP_THREAD_EXT_FRAG_REASSEMBLE_RFC815,
PCAP_THREAD_EXT_FRAG_REASSEMBLE_BSD
};
typedef struct pcap_thread_ext_frag_fragment pcap_thread_ext_frag_fragment_t;
struct pcap_thread_ext_frag_fragment {
pcap_thread_ext_frag_fragment_t* next;
unsigned short flag_more_fragments : 1;
u_char* payload;
size_t length;
size_t offset;
};
typedef struct pcap_thread_ext_frag_fragments pcap_thread_ext_frag_fragments_t;
struct pcap_thread_ext_frag_fragments {
pcap_thread_ext_frag_fragments_t* next;
pcap_thread_packet_t packet;
pcap_thread_ext_frag_fragment_t* fragments;
size_t num_fragments;
u_char* payload;
size_t length;
};
typedef void (*pcap_thread_ext_frag_callback_t)(const pcap_thread_packet_t* packet, const u_char* payload, size_t length, const pcap_thread_ext_frag_fragments_t* fragments);
/* clang-format off */
#define PCAP_THREAD_EXT_FRAG_CONF_T_INIT { \
0, 0, \
PCAP_THREAD_EXT_FRAG_REASSEMBLE_RFC791, \
100, 10, { 30, 0 }, \
0, 0 \
}
/* clang-format on */
typedef struct pcap_thread_ext_frag_conf pcap_thread_ext_frag_conf_t;
struct pcap_thread_ext_frag_conf {
unsigned short reject_overlap : 1;
unsigned short check_timeout : 1;
pcap_thread_ext_frag_reassemble_mode_t reassemble_mode;
size_t fragments;
size_t per_packet;
struct timeval timeout;
pcap_thread_ext_frag_callback_t overlap_callback;
pcap_thread_ext_frag_callback_t timeout_callback;
};
pcap_thread_ext_frag_conf_t* pcap_thread_ext_frag_conf_new(void);
void pcap_thread_ext_frag_conf_free(pcap_thread_ext_frag_conf_t* conf);
int pcap_thread_ext_frag_conf_reject_overlap(const pcap_thread_ext_frag_conf_t* conf);
int pcap_thread_ext_frag_conf_set_reject_overlap(pcap_thread_ext_frag_conf_t* conf, const int reject_overlap);
int pcap_thread_ext_frag_conf_check_timeout(const pcap_thread_ext_frag_conf_t* conf);
int pcap_thread_ext_frag_conf_set_check_timeout(pcap_thread_ext_frag_conf_t* conf, const int check_timeout);
pcap_thread_ext_frag_reassemble_mode_t pcap_thread_ext_frag_conf_reassemble_mode(const pcap_thread_ext_frag_conf_t* conf);
int pcap_thread_ext_frag_conf_set_reassemble_mode(pcap_thread_ext_frag_conf_t* conf, const pcap_thread_ext_frag_reassemble_mode_t reassemble_mode);
size_t pcap_thread_ext_frag_conf_fragments(const pcap_thread_ext_frag_conf_t* conf);
int pcap_thread_ext_frag_conf_set_fragments(pcap_thread_ext_frag_conf_t* conf, const size_t fragments);
size_t pcap_thread_ext_frag_conf_per_packet(const pcap_thread_ext_frag_conf_t* conf);
int pcap_thread_ext_frag_conf_set_per_packet(pcap_thread_ext_frag_conf_t* conf, const size_t per_packet);
struct timeval pcap_thread_ext_frag_conf_timeout(const pcap_thread_ext_frag_conf_t* conf);
int pcap_thread_ext_frag_conf_set_timeout(pcap_thread_ext_frag_conf_t* conf, const struct timeval timeout);
pcap_thread_ext_frag_callback_t pcap_thread_ext_frag_conf_overlap_callback(const pcap_thread_ext_frag_conf_t* conf);
int pcap_thread_ext_frag_conf_set_overlap_callback(pcap_thread_ext_frag_conf_t* conf, pcap_thread_ext_frag_callback_t overlap_callback);
pcap_thread_ext_frag_callback_t pcap_thread_ext_frag_conf_timeout_callback(const pcap_thread_ext_frag_conf_t* conf);
int pcap_thread_ext_frag_conf_set_timeout_callback(pcap_thread_ext_frag_conf_t* conf, pcap_thread_ext_frag_callback_t timeout_callback);
pcap_thread_layer_callback_frag_t pcap_thread_ext_frag_layer_callback(pcap_thread_ext_frag_conf_t* conf);
#ifdef __cplusplus
}
#endif
#endif /* __pcap_thread_ext_frag_h */
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