ipv6mon.h

/*
 * Header file for the ip6mon tool
 *
 */

#define LUI long unsigned int

#define BUFFER_SIZE 65556
#define SNAP_LEN 65535
#define ETH_ALEN 6              /* Octets in one ethernet addr	 */
#define ETH_HLEN 14             /* Total octets in header.	 */
#define ETH_DATA_LEN 1500       /* Max. octets in payload	 */
#define ETHERTYPE_IPV6 0x86dd   /* IP protocol version 6 */
#define ETHER_ADDR_LEN ETH_ALEN /* size of ethernet addr */
#define ETHER_HDR_LEN ETH_HLEN  /* total octets in header */

#define ETHER_ADDR_PLEN 18 /* Includes termination byte */

#define ETHER_ALLNODES_LINK_ADDR "33:33:00:00:00:01"
#define ETHER_ALLROUTERS_LINK_ADDR "33:33:00:00:00:02"

#define MIN_IPV6_HLEN 40
#define MIN_TCP_HLEN 20
#define MIN_UDP_HLEN 20
#define MIN_DST_OPT_HLEN 8
#define MIN_ICMP6_HLEN 8
#define SLLA_OPT_LEN 1
#define TLLA_OPT_LEN 1
#define MAX_TLLA_OPTION 256
#define MAX_IFACES 100 /* Max number of configured interfaces to search for */
#define IFACE_LENGTH 255

#define PROBE_ICMP6_ECHO 1
#define PROBE_UNREC_OPT 2

#define IPV6_FILTER "ip6"
#define TCPV6_FILTER "ip6 and tcp"
#define UDPV6_FILTER "ip6 and udp"
#define ICMPV6_FILTER "icmp6"
#define ICMPV6_NA_FILTER "icmp6 and ip6[7]==255 and ip6[40]==136 and ip6[41]==0"
#define ICMPV6_RA_FILTER "icmp6 and ip6[7]==255 and ip6[40]==134 and ip6[41]==0"

/* multi_scan */
#define ICMPV6_ECHO_RESPONSE_FILTER "icmp6 and ((ip6[40]==129 and ip6[41]==0) or (ip6[40]==135 and ip6[41]==0))"
#define ICMPV6_ERROR_FILTER "icmp6 and ((ip6[40]==4) or (ip6[40]==135 and ip6[41]==0))" /* ICMPv6 Parameter Problem */
#define ICMPV6_ECHO_PAYLOAD_SIZE 56

#define MAX_PREFIXES_ONLINK 100
#define MAX_PREFIXES_AUTO 100
#define MAX_IPV6_ENTRIES 65000
#define MAX_LOCAL_ADDRESSES 256

/* Constant for the host-scanning functions */
#define PRINT_ETHER_ADDR 1
#define NOT_PRINT_ETHER_ADDR 0

#define VALID_MAPPING 2
#define INVALID_MAPPING 3

#define ALL_NODES_MULTICAST_ADDR "FF02::1"
#define ALL_ROUTERS_MULTICAST_ADDR "FF02::2"
#define SOLICITED_NODE_MULTICAST_PREFIX "FF02:0:0:0:0:1:FF00::"

/* Support for IPv6 extension headers */
#define FRAG_HDR_SIZE 8
#define MAX_IPV6_PAYLOAD 65535
#define MAX_DST_OPT_HDR 256
#define MAX_DST_OPT_U_HDR MAX_DST_OPT_HDR
#define MAX_HBH_OPT_HDR MAX_DST_OPT_HDR

/* Filter Constants */
#define MAX_BLOCK_SRC 50
#define MAX_BLOCK_DST 50
#define MAX_BLOCK_TARGET 50
#define MAX_BLOCK_LINK_SRC 50
#define MAX_BLOCK_LINK_DST 50

#define MAX_ACCEPT_SRC 50
#define MAX_ACCEPT_DST 50
#define MAX_ACCEPT_TARGET 50
#define MAX_ACCEPT_LINK_SRC 50
#define MAX_ACCEPT_LINK_DST 50

#define ACCEPTED 1
#define BLOCKED 0

#define ADD_ENTRY 1
#define DEL_ENTRY 2

/* Constants used with the libcap functions */
#define PCAP_SNAP_LEN 65535

/*
   pcap filter to accept: Neighbor Solicitations, Neighbor Advertisements, Router Advertisements,
   Echo Reply, and ICMPv6 Error Messages
 */
#define PCAP_IPV6MON_FILTER                                                                                            \
    "icmp6 and ((((ip6[40]==134 and ip6[41]==0) or (ip6[40]==135 and ip6[41]==0) or (ip6[40]==136 and ip6[41]==0)) "   \
    "and ip6[7]==255) or (ip6[40]==129 and ip6[41]==0) or (ip6[40]==4))"

#define PCAP_TIMEOUT 1
#define PCAP_PROMISC 1
#define PCAP_OPT 1
#ifndef PCAP_NETMASK_UNKNOWN
#define PCAP_NETMASK_UNKNOWN 0xffffffff
#endif

#define MAX_LIST_ENTRIES 8192
#define MIN_ADDR_ENTRIES 100
#define MAX_ADDR_ENTRIES 50000
#define MAX_CANDIDATE_ENTRIES MAX_HOST_ENTRIES / 8;
#define MAX_FUDGE_FACTOR 15
#define MAX_HOST_PROBES 4
#define MAX_CANDIDATE_PROBES 4
#define MAX_UNPROBED_INTERVAL 40
#define MIN_UNICAST_PROBE_INTERVAL 10
#define UNICAST_PROBE_INTERVAL 15
#define ADDR_TIMEOUT 90
#define MIN_ADDR_TIMEOUT 30
#define MIN_CANDIDATE_TIMEOUT 30
#define CAND_ADDR_TIMEOUT ((ADDR_TIMEOUT * 3) / 4)
#define MC_ECHO_PROBE_INTERVAL 120
#define MIN_MC_ECHO_PROBE_INTERVAL 60
#define MC_UNREC_PROBE_INTERVAL 120
#define MIN_MC_UNREC_PROBE_INTERVAL 60
#define SELECT_TIMEOUT 4
#define RETRY_CONFIG 60
#define RS_SEND_INTERVAL 2
#define RA_ACCEPT_WINDOW 5
#define CHECK_CONFIG_INTERVAL 60
#define LOCAL_ADDRESS_TIMEOUT (CHECK_CONFIG_INTERVAL + RA_ACCEPT_WINDOW)
#define MAX_PROC_ENTRIES_INT 1
#define MAX_GARB_COLLECT_INT 10

/* Internal state of send_multicast */
#define SCAN_LOCAL 1
#define SCAN_GLOBAL 2

/* Possible values for the TimestampFormat */
#define TIMESTAMP_DATE 1
#define TIMESTAMP_EPOCH 2

/* Constants for config file processing */
#define MAX_LINE_SIZE 250
#define MAX_VAR_NAME_LEN 40

struct ether_addr {
    u_int8_t a[ETHER_ADDR_LEN];
} __attribute__((__packed__));

struct nd_opt_slla {
    u_int8_t type;
    u_int8_t length;
    u_int8_t address[6];
} __attribute__((__packed__));

struct nd_opt_tlla {
    u_int8_t type;
    u_int8_t length;
    u_int8_t address[6];
} __attribute__((__packed__));

struct ipv6pseudohdr {
    struct in6_addr srcaddr;
    struct in6_addr dstaddr;
    u_int32_t len;
    u_int8_t zero[3];
    u_int8_t nh;
} __attribute__((__packed__));

/* 10Mb/s ethernet header */
struct ether_header {
    struct ether_addr dst; /* destination eth addr	*/
    struct ether_addr src; /* source ether addr	*/
    u_int16_t ether_type;  /* packet type ID field	*/
} __attribute__((__packed__));

struct host_entry {
    struct in6_addr ip6;
    struct ether_addr ether;
    unsigned char flag;
    time_t fseen;
    time_t lseen;
    time_t lprobed;
    unsigned int nprobes;
    struct host_entry *next;
    struct host_entry *prev;
    unsigned int ffactor;
};

struct host_list {
    struct host_entry **host;   /* Double-linked list of host entries */
    unsigned int nhosts;        /* Current number of host entries */
    unsigned int maxhosts;      /* Maximum number of host entries */
    unsigned int ncandidates;   /* Candidate addresses in list */
    unsigned int maxcandidates; /* Maximum number of candidate entries */
    time_t lastprocessed;       /* Last time the list was processed entirely */
    time_t lastgcollection;     /* Last time the list was garbage-collected */

    u_int16_t key_l; /* Low-order word of the hash key */
    u_int16_t key_h; /* High-order word of the hash key */

    unsigned int mc_unrec_probe_f; /* Whether Unrec probes should be sent */
    unsigned int mc_unrec_state;   /* Multicast unrec probe state (local vs. global) */
    unsigned int mc_unrec_naddr;   /* Current src addr for mcast echo probes   */
    u_int16_t mc_unrec_seq;        /* Multicast unrec sequence #	*/
    time_t mc_unrec_last;          /* Last multicast unrec probe	*/

    unsigned int mc_echo_probe_f; /* Whether Echo probes should be sent */
    unsigned int mc_echo_state;   /* Multicast echo probe state (local vs. global) */
    unsigned int mc_echo_naddr;   /* Current src addr for mcast echo probes   */
    unsigned int mc_echo_seq;     /* Multicast echo sequence #	*/
    time_t mc_echo_last;          /* Last multicast echo probe	*/

    unsigned int np_key;          /* Next list entry to process	*/
    struct host_entry *np_hentry; /* Next host entry to process	*/
};

struct prefix_entry {
    struct in6_addr ip6;
    unsigned char len;
    time_t tstamp;
};

struct prefix_list {
    struct prefix_entry **prefix;
    unsigned int nprefix;
    unsigned int maxprefix;
};

struct address_list {
    struct in6_addr *addr;
    unsigned int naddr;
    unsigned int maxaddr;
};

struct iface_data {
    char iface[IFACE_LENGTH];
    struct ether_addr ether;
    unsigned int ether_flag;
    struct in6_addr ip6_local;
    unsigned int ip6_local_flag;
    struct prefix_list ip6_global;
    unsigned int ip6_global_flag;
    unsigned int ip6_global_nconfig;
    time_t ip6_global_conftime;
    time_t ip6_global_lastcheck;
    time_t last_rs;
    struct in6_addr router_ip6;
    struct ether_addr router_ether;
    struct prefix_list prefix_ac;
    struct prefix_list prefix_ol;
    unsigned int local_retrans;
    unsigned int local_timeout;
    unsigned int mtu;
    unsigned int pending_write_f;
    void *pending_write_data;
    unsigned int pending_write_size;
    int fd;
    fd_set *rset;
    fd_set *wset;
    fd_set *eset;
    unsigned int write_errors;
};

#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__APPLE__)
#ifndef s6_addr16
#define s6_addr16 __u6_addr.__u6_addr16
#endif

#ifndef s6_addr8
#define s6_addr8 __u6_addr.__u6_addr8
#endif

#ifndef s6_addr32
#define s6_addr32 __u6_addr.__u6_addr32
#endif
#endif

/* This causes Linux to use the BSD definition of the TCP and UDP header fields */
#ifndef __FAVOR_BSD
#define __FAVOR_BSD
#endif