136 lines
3.8 KiB
C
136 lines
3.8 KiB
C
/*
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* pibs - Passive Identification of BackScatter
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*
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* Copyright (C) 2019 Gerard Wagener
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* Copyright (C) 2019 CIRCL Computer Incident Response Center Luxembourg
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* (SMILE gie).
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _PIBS_H_
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#define _PIBS_H_
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#include <stdio.h>
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#include <stdlib.h>
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#include <getopt.h>
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#include <assert.h>
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#include <string.h>
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#include <pcap/pcap.h>
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#include <wtap.h>
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#include <wtap-int.h>
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#include <unistd.h>
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#include <signal.h>
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#include <netinet/ip.h>
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#include <netinet/in.h>
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#include <netinet/tcp.h>
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#include <arpa/inet.h>
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#include <sys/socket.h>
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#include <sys/ipc.h>
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#include <sys/shm.h>
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#include <errno.h>
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#include <hiredis/hiredis.h>
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//TODO test other values
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#define NBINS 1024 //Number of bins
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#define NBINITEMS 255 //Number of items per bin
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#define SZBIN 4
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#define SZUUID 40
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#define SZKEY 1024
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#define SZSERVER 1024
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#define NBINSCALE 2 // Scaling factor of the entire datastructure
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#define HDBG(...) if (HASHDEBUG) fprintf(stderr, __VA_ARGS__)
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#define ERR_ATTACH_NOT_EMPTY 11
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#define ERR_NO_SHMID_FILE 12
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typedef struct pibs_header_s {
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uint8_t magic [4];
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uint8_t version;
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//Put some useful stuff here
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uint32_t next_item;
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uint32_t bin_offset;
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uint64_t data_size;
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uint32_t max_item;
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uint8_t padding [3];
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} pibs_header_t;
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/* TODO This can squezed. Timestamp can be expressed on 8 bits i.e. relative
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* minutes
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* IP can be represented with 16 bits ipaddr = ip / bin_size
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* Not sure if space can be saved in usual cases
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*/
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typedef struct item_s {
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uint32_t timestamp;
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uint32_t next_item;
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uint32_t ipaddr;
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} item_t;
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/* Need to hash source IP addresses and record first seen and flags */
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typedef struct pibs_s {
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int errno_copy;
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int errno_pibs;
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char *filename;
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char *uuid;
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char *key;
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char *server;
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uint16_t port;
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redisContext *ctx;
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int should_dump_table;
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int show_backscatter;
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int show_stats;
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int should_create_shm;
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int should_attach;
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int should_writepcap;
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//TODO use self contained data structure that can be easily serialized
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//Put data structure in an entire block to easier serialize
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uint8_t *data;
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uint32_t next_block;
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uint32_t next_item;
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uint32_t bin_offset;
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uint64_t data_size;
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uint32_t* bin_table;
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uint32_t max_item;
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item_t* items;
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int shmid;
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char shmid_file [FILENAME_MAX];
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char outputfile[FILENAME_MAX];
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pcap_dumper_t* dumper;
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pcap_t* outcap;
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uint32_t redisdb;
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void* synseen_callback;
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} pibs_t;
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int load_shmid_file(pibs_t* pibs);
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int pibs_shmat(pibs_t* pibs);
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int pibs_shmget(pibs_t* pibs);
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int_fast64_t get_last_timestamp(pibs_t* pibs, uint32_t ip);
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void insert_ip(pibs_t* pibs, uint32_t ip, uint32_t ts);
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void process_frame(pibs_t* pibs, wtap *wth, uint8_t *eth);
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void process_file(pibs_t* pibs);
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void pibs_dump_raw(pibs_t* pibs);
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void pibs_dump_stats(pibs_t* pibs);
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void process_redis_list(pibs_t* pibs);
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void synseen_process_frame(pibs_t *pibs, wtap *wth, uint8_t* eth,
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struct ip* ipv4, struct tcphdr* tcp);
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int synseen_init(pibs_t* pibs);
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pibs_t* init(void);
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typedef void (* synseen_callback_t)(pibs_t* pibs, wtap *wth, uint8_t* eth,
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struct ip* ipv4, struct tcphdr* tcp);
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#endif
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