diff options
Diffstat (limited to 'src/pcap-thread/pcap_thread_ext_frag.h')
| -rw-r--r-- | src/pcap-thread/pcap_thread_ext_frag.h | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/src/pcap-thread/pcap_thread_ext_frag.h b/src/pcap-thread/pcap_thread_ext_frag.h new file mode 100644 index 0000000..dfa151a --- /dev/null +++ b/src/pcap-thread/pcap_thread_ext_frag.h @@ -0,0 +1,131 @@ +/* + * 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 */ |