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arp-scan.h
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arp-scan.h
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/*
* ARP Scan is Copyright (C) 2005-2013 Roy Hills, NTA Monitor Ltd.
*
* This file is part of arp-scan.
*
* arp-scan 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
* (at your option) any later version.
*
* arp-scan 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 arp-scan. If not, see <http://www.gnu.org/licenses/>.
*
* arp-scan.h -- Header file for ARP scanner
*
* Author: Roy Hills
* Date: 11 October 2005
*
*/
/* Includes */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifdef STDC_HEADERS
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include <stdarg.h>
#include <errno.h>
#else
#error This program requires the ANSI C Headers
#endif
#include <sys/types.h>
/* Integer types */
#ifdef HAVE_INTTYPES_H
#include <inttypes.h>
#else
#ifdef HAVE_STDINT_H
#include <stdint.h>
#endif
#endif
#ifdef __CYGWIN__
#include <windows.h> /* Include windows.h if compiling under Cygwin */
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_NETDB_H
#include <netdb.h>
#endif
#ifdef HAVE_GETOPT_H
#include <getopt.h>
#else
/* Include getopt.h for the sake of getopt_long.
We don't need the declaration of getopt, and it could conflict
with something from a system header file, so effectively nullify that. */
#define getopt getopt_loser
#include "getopt.h"
#undef getopt
#endif
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#ifdef TIME_WITH_SYS_TIME
# include <sys/time.h>
# include <time.h>
#else
# ifdef HAVE_SYS_TIME_H
# include <sys/time.h>
# else
# include <time.h>
# endif
#endif
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#ifdef HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif
#ifdef HAVE_REGEX_H
#include <regex.h> /* Posix regular expression functions */
#endif
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif
#ifdef HAVE_PCAP_H
#include <pcap.h>
#endif
#ifdef HAVE_SYS_IOCTL_H
#include <sys/ioctl.h>
#endif
#ifdef ARP_PCAP_DLPI
#ifdef HAVE_SYS_BUFMOD_H
#include <sys/bufmod.h>
#endif
#endif
#include "hash.h" /* Hash table functions */
/* Defines */
#define MAXLINE 255 /* Max line length for input files */
#define MAX_FRAME 2048 /* Maximum allowed frame size */
#define REALLOC_COUNT 1000 /* Entries to realloc at once */
#define DEFAULT_BANDWIDTH 256000 /* Default bandwidth in bits/sec */
#define PACKET_OVERHEAD 18 /* layer 2 overhead (6+6+2 + 4) */
#define MINIMUM_FRAME_SIZE 46 /* Minimum layer 2 date size */
#define DEFAULT_BACKOFF_FACTOR 1.5 /* Default timeout backoff factor */
#define DEFAULT_RETRY 2 /* Default number of retries */
#define DEFAULT_TIMEOUT 500 /* Default per-host timeout in ms */
#define SNAPLEN 64 /* 14 (ether) + 28 (ARP) + extra */
#define PROMISC 0 /* Enable promiscuous mode */
#define TO_MS 0 /* Timeout for pcap_open_live() */
#define OPTIMISE 1 /* Optimise pcap filter */
#define ARPHRD_ETHER 1 /* Ethernet ARP type */
#define ARPOP_REQUEST 1 /* ARP Request */
#define ARPOP_REPLY 2 /* ARP Reply */
#define ETHER_HDR_SIZE 14 /* Size of Ethernet frame header in bytes */
#define ARP_PKT_SIZE 28 /* Size of ARP Packet in bytes */
#define ETH_ALEN 6 /* Octets in one ethernet addr */
#define ETH_P_IP 0x0800 /* Internet Protocol packet */
#define ETH_P_ARP 0x0806 /* Address Resolution packet */
#define OUIFILENAME "ieee-oui.txt" /* Default IEEE OUI filename */
#define IABFILENAME "ieee-iab.txt" /* Default IEEE IAB filename */
#define MACFILENAME "mac-vendor.txt" /* Default MAC/Vendor filename */
#define DEFAULT_ARP_OP ARPOP_REQUEST /* Default ARP operation */
#define DEFAULT_ARP_HRD ARPHRD_ETHER /* Default ARP hardware type */
#define DEFAULT_ARP_PRO ETH_P_IP /* Default ARP protocol */
#define DEFAULT_ARP_HLN 6 /* Default hardware length */
#define DEFAULT_ARP_PLN 4 /* Default protocol length */
#define DEFAULT_ETH_PRO ETH_P_ARP /* Default Ethernet protocol */
#define FRAMING_ETHERNET_II 0 /* Standard Ethernet-II Framing */
#define FRAMING_LLC_SNAP 1 /* 802.3 with LLC/SNAP */
#define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
#define OPT_WRITEPKTTOFILE 256 /* --writepkttofile option */
#define OPT_READPKTFROMFILE 257 /* --readpktfromfile option */
#define OPT_RANDOMSEED 258 /* --randomseed option */
/* Structures */
typedef struct {
unsigned timeout; /* Timeout for this host in us */
struct in_addr addr; /* Host IP address */
struct timeval last_send_time; /* Time when last packet sent to this addr */
unsigned short num_sent; /* Number of packets sent */
unsigned short num_recv; /* Number of packets received */
unsigned char live; /* Set when awaiting response */
} host_entry;
/* Ethernet frame header */
typedef struct {
uint8_t dest_addr[ETH_ALEN]; /* Destination hardware address */
uint8_t src_addr[ETH_ALEN]; /* Source hardware address */
uint16_t frame_type; /* Ethernet frame type */
} ether_hdr;
/* Ethernet ARP packet from RFC 826 */
typedef struct {
uint16_t ar_hrd; /* Format of hardware address */
uint16_t ar_pro; /* Format of protocol address */
uint8_t ar_hln; /* Length of hardware address */
uint8_t ar_pln; /* Length of protocol address */
uint16_t ar_op; /* ARP opcode (command) */
uint8_t ar_sha[ETH_ALEN]; /* Sender hardware address */
uint32_t ar_sip; /* Sender IP address */
uint8_t ar_tha[ETH_ALEN]; /* Target hardware address */
uint32_t ar_tip; /* Target IP address */
} arp_ether_ipv4;
/* Functions */
#ifndef HAVE_STRLCAT
size_t strlcat(char *dst, const char *src, size_t siz);
#endif
#ifndef HAVE_STRLCPY
size_t strlcpy(char *dst, const char *src, size_t siz);
#endif
void err_sys(const char *, ...);
void warn_sys(const char *, ...);
void err_msg(const char *, ...);
void warn_msg(const char *, ...);
void err_print(int, const char *, va_list);
void usage(int, int);
void add_host_pattern(const char *, unsigned);
void add_host(const char *, unsigned, int);
int send_packet(pcap_t *, host_entry *, struct timeval *);
void recvfrom_wto(int, int, pcap_t *);
void remove_host(host_entry **);
void timeval_diff(const struct timeval *, const struct timeval *,
struct timeval *);
host_entry *find_host(host_entry **, struct in_addr *);
void display_packet(host_entry *, arp_ether_ipv4 *, const unsigned char *,
size_t, int, int, ether_hdr *, const struct pcap_pkthdr *);
void advance_cursor(void);
void dump_list(void);
void clean_up(pcap_t *);
void arp_scan_version(void);
char *make_message(const char *, ...);
void callback(u_char *, const struct pcap_pkthdr *, const u_char *);
void process_options(int, char *[]);
struct in_addr *get_host_address(const char *, int, struct in_addr *, char **);
const char *my_ntoa(struct in_addr);
int get_source_ip(const char *, uint32_t *);
void get_hardware_address(const char *, unsigned char []);
void marshal_arp_pkt(unsigned char *, ether_hdr *, arp_ether_ipv4 *, size_t *,
const unsigned char *, size_t);
int unmarshal_arp_pkt(const unsigned char *, size_t, ether_hdr *,
arp_ether_ipv4 *, unsigned char *, size_t *, int *);
unsigned char *hex2data(const char *, size_t *);
unsigned int hstr_i(const char *);
char *hexstring(const unsigned char *, size_t);
int get_ether_addr(const char *, unsigned char *);
int add_mac_vendor(struct hash_control *, const char *);
char *get_mac_vendor_filename(const char *, const char *, const char *);
/* Wrappers */
int Gettimeofday(struct timeval *);
void *Malloc(size_t);
void *Realloc(void *, size_t);
unsigned long int Strtoul(const char *, int);
long int Strtol(const char *, int);
unsigned str_to_bandwidth(const char *);
unsigned str_to_interval(const char *);
char *dupstr(const char *);
/* MT19937 prototypes */
void init_genrand(unsigned long);
void init_by_array(unsigned long[], int);
unsigned long genrand_int32(void);
long genrand_int31(void);
double genrand_real1(void);
double genrand_real2(void);
double genrand_real3(void);
double genrand_res53(void);