libbsm/libbsm.go

// This is an implementation of libbsm
// Copyright johan@nosd.in 2021
//
// +build freebsd
//
// Use libc to get pw name from uid

package main

/*
#cgo CFLAGS: -I /usr/lib
#cgo LDFLAGS: -L. -lc
#include <sys/types.h>
#include <stdlib.h>
#include <utmpx.h>
#include <grp.h>
#include <pwd.h>
*/
import "C"

import (
	"io"
	"os"
	"fmt"
	"time"
	"bufio"
	"bytes"
	"strings"
	"strconv"
	"encoding/binary"
)

const (
    // bsm/libbsm.h
    AUDIT_MAX_ARGS =    	128
	AUDIT_EVENT_FILE =		"/etc/security/audit_event"

    // sys/bsm/audit.h
    MAXAUDITDATA =			(0x8000 - 1)
    MAX_AUDIT_RECORD_SIZE = MAXAUDITDATA

	// Max length for a Path (AUT_PATH) or an arg (AUT_EXEC_ARGS)
	MAX_AUDIT_ARG_LENGTH =	1024

/*
 * Token type identifiers.
 From https://github.com/freebsd/freebsd-src/blob/main/contrib/openbsm/sys/bsm/audit_record.h
 */
	AUT_INVALID =		0x00
	AUT_OTHER_FILE32 =	0x11
	AUT_OHEADER =		0x12
	AUT_TRAILER =		0x13
	AUT_HEADER32 =		0x14
	AUT_HEADER32_EX =	0x15
	AUT_DATA =			0x21
	AUT_IPC =			0x22
	AUT_PATH =			0x23
	AUT_SUBJECT32 =		0x24
	AUT_XATPATH =		0x25
	AUT_PROCESS32 =		0x26
	AUT_RETURN32 =		0x27
	AUT_TEXT =			0x28
	AUT_OPAQUE =		0x29
	AUT_IN_ADDR =		0x2a
	AUT_IP =			0x2b
	AUT_IPORT =			0x2c
	AUT_ARG32 =			0x2d
	AUT_SOCKET =		0x2e
	AUT_SEQ =			0x2f
	AUT_ACL =			0x30
	AUT_ATTR =			0x31
	AUT_IPC_PERM =		0x32
	AUT_LABEL =			0x33
	AUT_GROUPS =		0x34
	AUT_ACE =			0x35
	AUT_PRIV =			0x38
	AUT_UPRIV =			0x39
	AUT_LIAISON =		0x3a
	AUT_NEWGROUPS =		0x3b
	AUT_EXEC_ARGS =		0x3c
	AUT_EXEC_ENV =		0x3d
	AUT_ATTR32 =		0x3e
	AUT_UNAUTH =		0x3f
	AUT_XATOM =			0x40
	AUT_XOBJ =			0x41
	AUT_XPROTO =		0x42
	AUT_XSELECT =		0x43
	AUT_XCOLORMAP =		0x44
	AUT_XCURSOR =		0x45
	AUT_XFONT =			0x46
	AUT_XGC =			0x47
	AUT_XPIXMAP =		0x48
	AUT_XPROPERTY =		0x49
	AUT_XWINDOW =		0x4a
	AUT_XCLIENT =		0x4b
	AUT_CMD =			0x51
	AUT_EXIT =			0x52
	AUT_ZONENAME =		0x60
	AUT_HOST =			0x70
	AUT_ARG64 =			0x71
	AUT_RETURN64 =		0x72
	AUT_ATTR64 =		0x73
	AUT_HEADER64 =		0x74
	AUT_SUBJECT64 =		0x75
	AUT_PROCESS64 =		0x77
	AUT_OTHER_FILE64 =	0x78
	AUT_HEADER64_EX =	0x79
	AUT_SUBJECT32_EX =	0x7a
	AUT_PROCESS32_EX =	0x7b
	AUT_SUBJECT64_EX =	0x7c
	AUT_PROCESS64_EX =	0x7d
	AUT_IN_ADDR_EX =	0x7e
	AUT_SOCKET_EX =		0x7f


	// Display control
	PRT_ONELINE = 			1
	PRT_NORESOLVE_USER =	2
	PRT_TIMESTAMP =			4

)

var (
	// A global user/uid cache
	gUsers		[]user
	// A global group/gid cache
	gGroups		[]group
	// Cache of audit_event file
	gEventDB	[]event
)


type event struct {
	Type	int
	Name	string
	Desc	string
	Class	string
}


// Fields types, from https://github.com/freebsd/freebsd-src/blob/main/contrib/openbsm/bsm/libbsm.h

// Abstraction of a record
type Record interface {
	GetType()						uint8
//	Length()
	LoadFromBinary(rdr *bufio.Reader)	error
	Print(*os.File, string, int)
}

type Header32 struct {
	Size		uint32		// Record byte count
	Version		uint8		// version # (uchar)
	E_type		uint16		// Event type
	E_mod		uint16		// Event modifier
	S			uint32		// Seconds of time
	Msec		uint32		// Milliseconds of time
}

type Header32Ex struct {
	Size		uint32		// Record byte count
	Version		uint8		// version # (uchar)
	E_type		uint16		// Event type
	E_mod		uint16		// Event modifier
	Ad_type		uint32		// Address type/Length
	Addr		[4]uint32	// Ipv4 or IPv6
	S			uint32		// Seconds of time
	Msec		uint32		// Milliseconds of time
}

type Trailer struct {
	Magic		uint16
	Count		uint32
}

type Arg32 struct {
	No			byte		// Argument #
	Val			uint32		// Argument value
	Length		uint16		// Text length
	Text		[]byte		// Text
}

type Arg64 struct {
	No			byte		// Argument #
	Val			uint64		// Argument value
	Length		uint16		// Text length
	Text		[]byte		// Text
}

type Attribute32 struct {
	Mode		uint32		// file access mode
	Uid			uint32		// Owner user ID
	Gid			uint32		// Owner group ID
	Fsid		uint32		// File system ID
	Nid			uint64		// Node ID
	Dev			uint32		// Device
}

type Attribute64 struct {
	Mode		uint32		// file access mode
	Uid			uint32		// Owner user ID
	Gid			uint32		// Owner group ID
	Fsid		uint32		// File system ID
	Nid			uint64		// Node ID
	Dev			uint64		// Device
}

/*
* count                   4 bytes
* text                    count null-terminated string(s)
*/
type ExecArg struct {
	Count		uint32
	//Text		[AUDIT_MAX_ARGS][]byte
	Text		[][]byte
}

type Path struct {
	Length		uint16		// path length
	Path		[]byte
}

type Return32 struct {
	Status		byte		// Error status
	Ret			uint32		// Return code
}

type Return64 struct {
	Status		byte		// Error status
	Ret			uint64		// Return code
}

type Subject32 struct {
	Auid		uint32		// Audit ID
	Euid		uint32		// Effective user ID
	Egid		uint32		// Effective Group ID
	Ruid		uint32		// Real User ID
	Rgid		uint32		// Real Group ID
	Pid			uint32		// Process ID
	Sid			uint32		// Session ID
	Tid			Tid32
}

type Process32 Subject32

type Subject32Ex struct {
	Auid		uint32		// Audit ID
	Euid		uint32		// Effective user ID
	Egid		uint32		// Effective Group ID
	Ruid		uint32		// Real User ID
	Rgid		uint32		// Real Group ID
	Pid			uint32		// Process ID
	Sid			uint32		// Session ID
	Tid			Tid32Ex
}

type Process32Ex Subject32Ex

type Tid32 struct {
	Port	uint32
	IpVers	uint32			// 0x10 = IPv6
	Addr	uint32
}

type Tid32Ex struct {
	Port	uint32
	Ttype	uint32
	IpVers	uint32			// 0x10 = IPv6, 0x04 = IPv4
	Addr4	uint32			// 4 bytes long if IpVers == 0x04
	Addr6	[4]uint32		// 4x4 bytes long if IpVers == 0x10
}

type Subject64 struct {
	Auid		uint32		// Audit ID
	Euid		uint32		// Effective user ID
	Egid		uint32		// Effective Group ID
	Ruid		uint32		// Real User ID
	Rgid		uint32		// Real Group ID
	Pid			uint32		// Process ID
	Sid			uint32		// Session ID
	Tid			Tid64
}

type Process64 Subject64

type Subject64Ex struct {
	Auid		uint32		// Audit ID
	Euid		uint32		// Effective user ID
	Egid		uint32		// Effective Group ID
	Ruid		uint32		// Real User ID
	Rgid		uint32		// Real Group ID
	Pid			uint32		// Process ID
	Sid			uint32		// Session ID
	Tid			Tid64Ex
}

type Process64Ex Subject64Ex

type Tid64 struct {
	Port	uint64
	IpVers	uint32
	Addr	uint32
}

type Tid64Ex struct {
	Port	uint64
	Ttype	uint32
	IpVers	uint32			// 0x10 = IPv6, 0x04 = IPv4
	Addr4	uint32
	Addr6	[4]uint32
}

type Exit struct {
	Status	uint32
	Ret		uint32
}

type Text struct {
	Length	uint16
	Text	[]byte
}


/* Utilities */
// users ID for resolution
type user struct {
	uid		uint32
	name	string
}

// groups ID for resolution
type group struct {
	gid		uint32
	name	string
}

/* Utilities */
// Return uid if user not found
func getUserName(uid uint32) (string, error) {
	for _, u := range gUsers {
		if u.uid == uid {
			return u.name, nil
		}
	}
	// Not found in cache, get it from system query
	u, err := getUserNameByUid(uid)
	if err != nil {
		// If not found, return user object with name = uid
		if err.Error() == "User ID not found" {
			u.uid = uid
			u.name = strconv.FormatUint(uint64(uid), 10)
			gUsers = append(gUsers, u)
			return u.name, err
		} else {
			return "", err
		}
	}
	gUsers = append(gUsers, u)
	return u.name, nil
}
func getUserNameByUid(uid uint32) (user, error) {
    var pw  *C.struct_passwd
    var usr user

    pw = C.getpwuid((C.uint32_t)(uid))
    if pw == nil {
        return usr, fmt.Errorf("User ID not found")
    }

    usr.uid = uid
    usr.name = C.GoString(pw.pw_name)

    return usr, nil
}


func getGroupName(gid uint32) (string, error) {
	for _, g := range gGroups {
		if g.gid == gid {
			return g.name, nil
		}
	}
	// Not found in cache, get it from system query
	g, err := getGroupNameByGid(gid)
	if err != nil {
		// If not found, return group object with name = gid
		if err.Error() == "Group ID not found" {
			g.gid = gid
			g.name = strconv.FormatUint(uint64(gid), 10)
			gGroups = append(gGroups, g)
			return g.name, err
		} else {
			return "", err
		}
	}
	gGroups = append(gGroups, g)
	return g.name, nil
}
func getGroupNameByGid(gid uint32) (group, error) {
    var gr  *C.struct_group
    var grp group

    gr = C.getgrgid((C.uint32_t)(gid))
    if gr == nil {
        return grp, fmt.Errorf("Group ID not found")
    }

    grp.gid = gid
    grp.name = C.GoString(gr.gr_name)

    return grp, nil
}

func getEventName(event uint16) (string,error) {
	if len(gEventDB) == 0 {
		loadEventDB()
	}
	for _, ev := range gEventDB {
		if ev.Type == int(event) {
			return ev.Desc, nil
		}
	}
	return "", fmt.Errorf("Event ID not found: %x\n", event)
}

// We load the entire file in memory
func loadEventDB() error {
	file, err := os.Open(AUDIT_EVENT_FILE)
	if err != nil {
		return err
	}
	defer file.Close()

	fileScan := bufio.NewScanner(file)
	fileScan.Split(bufio.ScanLines)
	for fileScan.Scan() {
		line := fileScan.Text()
		if strings.HasPrefix(line, "#") {
			continue
		}
		eventStr := strings.Split(line, ":")
		if len(eventStr) != 4 {
			continue
		}
		t, _ := strconv.Atoi(eventStr[0])
		gEventDB = append(gEventDB, event{Type: t,
										Name: eventStr[1],
										Desc: eventStr[2],
										Class: eventStr[3],})
	}
	return nil
}

func PrintIpv4FromInt(ipv4int uint32) string {
	return fmt.Sprintf("%d.%d.%d.%d", ipv4int & 0xFF000000 >> 24, ipv4int & 0x00FF0000 >> 16,
								ipv4int & 0x0000FF00 >> 8, ipv4int & 0x000000FF)
}

func PrintIpv6FromInt(ipv6int [4]uint32) string {
	//return fmt.Sprintf("%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x", 
	return fmt.Sprintf("%x:%x:%x:%x:%x:%x:%x:%x", 
			ipv6int[0] & 0xFFFF0000 >> 16, ipv6int[0] & 0x0000FFFF,
		ipv6int[1] & 0xFFFF0000 >> 16, ipv6int[1] & 0x0000FFFF,
		ipv6int[2] & 0xFFFF0000 >> 16, ipv6int[2] & 0x0000FFFF,
		ipv6int[3] & 0xFFFF0000 >> 16, ipv6int[3] & 0x0000FFFF)
}

/* Records structs implementation */
func NewHeader32(h Header32) *Header32 {
	return &Header32{
		Size: h.Size,
		Version: h.Version,
		E_type: h.E_type,
		E_mod: h.E_mod,
		S: h.S,
		Msec: h.Msec,
	}
}

func (h *Header32) GetType() uint8 {
	return AUT_HEADER32
}

// TODO : Take *io.Reader as arg?
func (h *Header32) LoadFromBinary(rdr *bufio.Reader) error {
	err := binary.Read(rdr, binary.BigEndian, &h.Size)
	if err != nil { return fmt.Errorf("Unable to read Header32.Size: %v", err) }

	/* Check for recsize sanity: We already read 32 bits + 8 bits */
	if h.Size < (4 + 1) {
		return fmt.Errorf("Record size is corrupted: %d", h.Size)
	}

	err = binary.Read(rdr, binary.BigEndian, &h.Version)
	if err != nil { return fmt.Errorf("Unable to read Header32.Version: %v", err) }
	
	err = binary.Read(rdr, binary.BigEndian, &h.E_type)
	if err != nil { return fmt.Errorf("Unable to read Header32.E_type: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &h.E_mod)
	if err != nil { return fmt.Errorf("Unable to read Header32.E_mod: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &h.S)
	if err != nil { return fmt.Errorf("Unable to read Header32.S: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &h.Msec)
	if err != nil { return fmt.Errorf("Unable to read Header32.Msec: %v", err) }

	return nil
}


/* Implementation of
	static void
	print_header32_tok(FILE *fp, tokenstr_t *tok, char *del, int oflags)
*/
func (h *Header32) Print(file *os.File, delimiter string, flags int) {
	var timeval string
	if PRT_TIMESTAMP == flags & PRT_TIMESTAMP {
		timeval = strconv.Itoa(int(h.S))
	} else {
		t := time.Unix((int64)(h.S), 0)
		timeval = t.Format(time.UnixDate)
	}
	// We dont care for error
	evdesc, _ := getEventName(h.E_type)
	fmt.Fprintf(file, "header%s%d%s%d%s%s%s%v%s%s%s%d", delimiter, h.Size, delimiter, h.Version, delimiter,
				//h.E_type, delimiter, h.E_mod, delimiter, t.Format(time.UnixDate), delimiter, h.Msec)
				evdesc, delimiter, h.E_mod, delimiter, timeval, delimiter, h.Msec)
	if 0 == (flags & PRT_ONELINE) {
		fmt.Fprintf(file, "\n")
	} else {
		fmt.Fprintf(file, "%s", delimiter)
	}
}

func NewExecArg(e ExecArg) *ExecArg {
	return &ExecArg{
		Count:	e.Count,
		Text:	e.Text,
	}
}

func (e *ExecArg) GetType() uint8 {
	return AUT_EXEC_ARGS
}

func (e *ExecArg) LoadFromBinary(rdr *bufio.Reader) error {
	err := binary.Read(rdr, binary.BigEndian, &e.Count)
	if err != nil { return fmt.Errorf("Unable to read ExecArg.Count: %v", err) }

	for i := uint32(0) ; i < e.Count ; i++ {
		// Get this arg length
		arg, err := rdr.ReadBytes((byte)(0x00))
		if err != nil {
			return fmt.Errorf("Error searching for null terminated exec arg: Loop exec n%d, error : %v", i, err)
		}
		e.Text = append(e.Text, arg[:len(arg)-1])
	}

	return nil	
}

func (e *ExecArg) Print(file *os.File, delimiter string, flags int) {
	fmt.Fprintf(file, "exec arg%s", delimiter)
	for i := uint32(0) ; i < e.Count ; i++ {
		if i < e.Count - 1 {
			fmt.Fprintf(file, "%s%s", string(e.Text[i]), delimiter)
		} else {
			fmt.Fprintf(file, "%s", string(e.Text[i]))
		}
	}
	if 0 == (flags & PRT_ONELINE) {
		fmt.Fprintf(file, "\n")
	} else {
		fmt.Fprintf(file, "%s", delimiter)
	}
}

func NewPath(p Path) *Path {
	return &Path{
		Length:	p.Length,
		Path:	p.Path,
	}
}

func (p *Path) GetType() uint8 {
	return AUT_PATH
}

func (p *Path) LoadFromBinary(rdr *bufio.Reader) error {
	err := binary.Read(rdr, binary.BigEndian, &p.Length)
	if err != nil { return fmt.Errorf("Unable to read Path.Length: %v", err) }

	arg, err := rdr.ReadBytes((byte)(0x00))
	if err != nil {
		return fmt.Errorf("Error searching for null terminated path: error : %v", err)
	}
	p.Path = arg[:len(arg)-1]

	return nil
}

func (p *Path) Print(file *os.File, delimiter string, flags int) {
	fmt.Fprintf(file, "path%s%s", delimiter, string(p.Path))
	if 0 == (flags & PRT_ONELINE) {
		fmt.Fprintf(file, "\n")
	} else {
		fmt.Fprintf(file, "%s", delimiter)
	}
}

func NewAttribute32(a Attribute32) *Attribute32 {
	return &Attribute32{
		Mode:	a.Mode,
		Uid:	a.Uid,
		Gid:	a.Gid,
		Fsid:	a.Fsid,
		Nid:	a.Nid,
		Dev:	a.Dev,
	}
}

func (a* Attribute32) GetType() uint8 {
	return AUT_ATTR32
}

func (a *Attribute32) LoadFromBinary(rdr *bufio.Reader) error {
	err := binary.Read(rdr, binary.BigEndian, &a.Mode)
	if err != nil { return fmt.Errorf("Unable to read Attribute32.Mode: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &a.Uid)
	if err != nil { return fmt.Errorf("Unable to read Attribute32.Uid: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &a.Gid)
	if err != nil { return fmt.Errorf("Unable to read Attribute32.Gid: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &a.Fsid)
	if err != nil { return fmt.Errorf("Unable to read Attribute32.Fsid: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &a.Nid)
	if err != nil { return fmt.Errorf("Unable to read Attribute32.Nid: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &a.Dev)
	if err != nil { return fmt.Errorf("Unable to read Attribute32.Dev: %v", err) }

	return nil
}

func (a *Attribute32) Print(file *os.File, delimiter string, flags int) {
	var user	string
	var group	string

	if PRT_NORESOLVE_USER == flags & PRT_NORESOLVE_USER {
		user = strconv.Itoa(int(a.Uid))
		group = strconv.Itoa(int(a.Gid))
	} else {
		user, _ = getUserName(a.Uid)
		group, _ = getGroupName(a.Gid)
	}
	
	fmt.Fprintf(file, "attribute%s%o%s%s%s%s%s%v%s%v%s%v", delimiter, a.Mode, delimiter, user, delimiter,
				group, delimiter, a.Fsid, delimiter, a.Nid, delimiter, a.Dev)

	if 0 == (flags & PRT_ONELINE) {
		fmt.Fprintf(file, "\n")
	} else {
		fmt.Fprintf(file, "%s", delimiter)
	}
}

func NewAttribute64(a Attribute64) *Attribute64 {
	return &Attribute64{
		Mode:	a.Mode,
		Uid:	a.Uid,
		Gid:	a.Gid,
		Fsid:	a.Fsid,
		Nid:	a.Nid,
		Dev:	a.Dev,
	}
}

func (a* Attribute64) GetType() uint8 {
	return AUT_ATTR64
}

func (a *Attribute64) LoadFromBinary(rdr *bufio.Reader) error {
	err := binary.Read(rdr, binary.BigEndian, &a.Mode)
	if err != nil { return fmt.Errorf("Unable to read Attribute64.Mode: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &a.Uid)
	if err != nil { return fmt.Errorf("Unable to read Attribute64.Uid: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &a.Gid)
	if err != nil { return fmt.Errorf("Unable to read Attribute64.Gid: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &a.Fsid)
	if err != nil { return fmt.Errorf("Unable to read Attribute64.Fsid: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &a.Nid)
	if err != nil { return fmt.Errorf("Unable to read Attribute64.Nid: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &a.Dev)
	if err != nil { return fmt.Errorf("Unable to read Attribute64.Dev: %v", err) }

	return nil
}

func (a *Attribute64) Print(file *os.File, delimiter string, flags int) {
	var user string
	var group string
	// TODO : resolve Uid and Gid (also support domain accounts)
	if PRT_NORESOLVE_USER == flags & PRT_NORESOLVE_USER {
		user =	strconv.Itoa(int(a.Uid))
		group =	strconv.Itoa(int(a.Gid))
	} else {
		user, _ =	getUserName(a.Uid)
		group, _ =	getGroupName(a.Gid)
	}
	fmt.Fprintf(file, "attribute%s%o%s%v%s%v%s%v%s%v%s%v", delimiter, a.Mode, delimiter, user, delimiter,
				group, delimiter, a.Fsid, delimiter, a.Nid, delimiter, a.Dev)
	if 0 == (flags & PRT_ONELINE) {
		fmt.Fprintf(file, "\n")
	} else {
		fmt.Fprintf(file, "%s", delimiter)
	}
}

func NewSubject32(s Subject32) *Subject32 {
	return &Subject32{
		Auid:	s.Auid,
		Euid:	s.Euid,
		Egid:	s.Egid,
		Ruid:	s.Ruid,
		Rgid:	s.Rgid,
		Pid:	s.Pid,
		Sid:	s.Sid,
		Tid:	s.Tid,
	}
}

func (s *Subject32) GetType() uint8 {
	return AUT_SUBJECT32
}

func (s *Subject32) LoadFromBinary(rdr *bufio.Reader) error {
	err := binary.Read(rdr, binary.BigEndian, &s.Auid)
	if err != nil { return fmt.Errorf("Unable to read Sibject32.Auid: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &s.Euid)
	if err != nil { return fmt.Errorf("Unable to read Subject32.Euid: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &s.Egid)
	if err != nil { return fmt.Errorf("Unable to read Subject32.Egid: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &s.Ruid)
	if err != nil { return fmt.Errorf("Unable to read Subject32.Ruid: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &s.Rgid)
	if err != nil { return fmt.Errorf("Unable to read Subject32.Rgid: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &s.Sid)
	if err != nil { return fmt.Errorf("Unable to read Subject32.Sid: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &s.Tid)
	if err != nil { return fmt.Errorf("Unable to read Subject32.Tid: %v", err) }

	return nil
}

func (s *Subject32) Print(file *os.File, delimiter string, flags int) {
	var auser	string
	var euser	string
	var egroup	string
	var ruser	string
	var rgroup	string
	if PRT_NORESOLVE_USER == flags & PRT_NORESOLVE_USER {
		auser =		strconv.Itoa(int(s.Auid))
		euser =		strconv.Itoa(int(s.Euid))
		egroup =	strconv.Itoa(int(s.Egid))
		ruser =		strconv.Itoa(int(s.Ruid))
		rgroup =	strconv.Itoa(int(s.Rgid))
	} else {
		auser, _ =		getUserName(s.Auid)
		euser, _ =		getUserName(s.Euid)
		egroup, _ =		getGroupName(s.Egid)
		ruser, _ =		getUserName(s.Ruid)
		rgroup, _ =		getGroupName(s.Rgid)
	}
	fmt.Fprintf(file, "subject%s%s%s%s%s%s%s%s%s%s%s%v%s%v%s%v%s%s", delimiter, auser, delimiter, euser, delimiter, egroup,
				delimiter, ruser, delimiter, rgroup, delimiter, s.Sid, delimiter, s.Tid.Port, delimiter, s.Tid.IpVers,
				delimiter, PrintIpv4FromInt(s.Tid.Addr))
	if 0 == (flags & PRT_ONELINE) {
		fmt.Fprintf(file, "\n")
	} else {
		fmt.Fprintf(file, "%s", delimiter)
	}
}

func NewProcess32(s Process32) *Process32 {
	return &Process32{
		Auid:	s.Auid,
		Euid:	s.Euid,
		Egid:	s.Egid,
		Ruid:	s.Ruid,
		Rgid:	s.Rgid,
		Pid:	s.Pid,
		Sid:	s.Sid,
		Tid:	s.Tid,
	}
}

func (p *Process32) GetType() uint8 {
	return AUT_PROCESS32
}

func (p *Process32) LoadFromBinary(rdr *bufio.Reader) error {
	err := binary.Read(rdr, binary.BigEndian, &p.Auid)
	if err != nil { return fmt.Errorf("Unable to read Process32.Auid: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &p.Euid)
	if err != nil { return fmt.Errorf("Unable to read Process32.Euid: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &p.Egid)
	if err != nil { return fmt.Errorf("Unable to read Process32.Egid: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &p.Ruid)
	if err != nil { return fmt.Errorf("Unable to read Process32.Ruid: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &p.Rgid)
	if err != nil { return fmt.Errorf("Unable to read Process32.Rgid: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &p.Sid)
	if err != nil { return fmt.Errorf("Unable to read Process32.Sid: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &p.Tid)
	if err != nil { return fmt.Errorf("Unable to read Process32.Tid: %v", err) }

	return nil
}

func (p *Process32) Print(file *os.File, delimiter string, flags int) {
	var auser	string
	var euser	string
	var egroup	string
	var ruser	string
	var rgroup	string
	if PRT_NORESOLVE_USER == flags & PRT_NORESOLVE_USER {
		auser =		strconv.Itoa(int(p.Auid))
		euser =		strconv.Itoa(int(p.Euid))
		egroup =	strconv.Itoa(int(p.Egid))
		ruser =		strconv.Itoa(int(p.Ruid))
		rgroup =	strconv.Itoa(int(p.Rgid))
	} else {
		auser, _ =	getUserName(p.Auid)
		euser, _ =	getUserName(p.Euid)
		egroup, _ =	getGroupName(p.Egid)
		ruser, _ =	getUserName(p.Ruid)
		rgroup, _ =	getGroupName(p.Rgid)
	}
	fmt.Fprintf(file, "process%s%s%s%s%s%s%s%s%s%s%s%v%s%v%s%v%s%s", delimiter, auser, delimiter, euser, delimiter, egroup,
				delimiter, ruser, delimiter, rgroup, delimiter, p.Sid, delimiter, p.Tid.Port, delimiter, p.Tid.IpVers,
				delimiter, PrintIpv4FromInt(p.Tid.Addr))
	if 0 == (flags & PRT_ONELINE) {
		fmt.Fprintf(file, "\n")
	} else {
		fmt.Fprintf(file, "%s", delimiter)
	}
}

func NewSubject32Ex(s Subject32Ex) *Subject32Ex {
	return &Subject32Ex{
		Auid:	s.Auid,
		Euid:	s.Euid,
		Egid:	s.Egid,
		Ruid:	s.Ruid,
		Rgid:	s.Rgid,
		Pid:	s.Pid,
		Sid:	s.Sid,
		Tid:	s.Tid,
	}
}

func (s *Subject32Ex) GetType() uint8 {
	return AUT_SUBJECT32_EX
}

func (s *Subject32Ex) LoadFromBinary(rdr *bufio.Reader) error {

	err := binary.Read(rdr, binary.BigEndian, &s.Auid)
	if err != nil { return fmt.Errorf("Unable to read Sibject32Ex.Auid: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &s.Euid)
	if err != nil { return fmt.Errorf("Unable to read Subject32Ex.Euid: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &s.Egid)
	if err != nil { return fmt.Errorf("Unable to read Subject32Ex.Egid: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &s.Ruid)
	if err != nil { return fmt.Errorf("Unable to read Subject32Ex.Ruid: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &s.Rgid)
	if err != nil { return fmt.Errorf("Unable to read Subject32Ex.Rgid: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &s.Sid)
	if err != nil { return fmt.Errorf("Unable to read Subject32Ex.Sid: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &s.Tid.Port)
	if err != nil { return fmt.Errorf("Unable to read Subject32Ex.Tid.Port: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &s.Tid.Ttype)
	if err != nil { return fmt.Errorf("Unable to read Subject32Ex.Tid.Ttype: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &s.Tid.IpVers)
	if err != nil { return fmt.Errorf("Unable to read Subject32Ex.Tid.IpVers: %v", err) }

	if s.Tid.IpVers == 0x10 {
		err = binary.Read(rdr, binary.BigEndian, &s.Tid.Addr6)
		if err != nil { return fmt.Errorf("Unable to read Subject32Ex.Tid.Addr6: %v", err) }
	} else if s.Tid.IpVers == 0x04 {
		err = binary.Read(rdr, binary.BigEndian, &s.Tid.Addr4)
		if err != nil { return fmt.Errorf("Unable to read Subject32Ex.Tid.Addr4: %v", err) }
	}

	return nil
}

func (s *Subject32Ex) Print(file *os.File, delimiter string, flags int) {
	var auser	string
	var euser	string
	var egroup	string
	var ruser	string
	var rgroup	string
	var ip		string
	if PRT_NORESOLVE_USER == flags & PRT_NORESOLVE_USER {
		auser =		strconv.Itoa(int(s.Auid))
		euser =		strconv.Itoa(int(s.Euid))
		egroup =	strconv.Itoa(int(s.Egid))
		ruser =		strconv.Itoa(int(s.Ruid))
		rgroup =	strconv.Itoa(int(s.Rgid))
	} else {
		auser, _ =	getUserName(s.Auid)
		euser, _ =	getUserName(s.Euid)
		egroup, _ =	getGroupName(s.Egid)
		ruser, _ =	getUserName(s.Ruid)
		rgroup, _ =	getGroupName(s.Rgid)
	}
	if s.Tid.IpVers == 0x04 {
		ip = PrintIpv4FromInt(s.Tid.Addr4)
	} else {
		ip = PrintIpv6FromInt(s.Tid.Addr6)
	}
	fmt.Fprintf(file, "subject_ex%s%s%s%s%s%s%s%s%s%s%s%v%s%v%s%v%s%s", delimiter, auser, delimiter, euser,
				delimiter, egroup, delimiter, ruser, delimiter, rgroup, delimiter, s.Sid, delimiter, s.Tid.Port, delimiter,
				s.Tid.Ttype, delimiter, ip)
	
	if 0 == (flags & PRT_ONELINE) {
		fmt.Fprintf(file, "\n")
	} else {
		fmt.Fprintf(file, "%s", delimiter)
	}
}

func NewProcess32Ex(p Process32Ex) *Process32Ex {
	return &Process32Ex{
		Auid:	p.Auid,
		Euid:	p.Euid,
		Egid:	p.Egid,
		Ruid:	p.Ruid,
		Rgid:	p.Rgid,
		Pid:	p.Pid,
		Sid:	p.Sid,
		Tid:	p.Tid,
	}
}

func (s *Process32Ex) GetType() uint8 {
	return AUT_PROCESS32_EX
}

func (p *Process32Ex) LoadFromBinary(rdr *bufio.Reader) error {

	err := binary.Read(rdr, binary.BigEndian, &p.Auid)
	if err != nil { return fmt.Errorf("Unable to read Process32Ex.Auid: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &p.Euid)
	if err != nil { return fmt.Errorf("Unable to read Process32Ex.Euid: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &p.Egid)
	if err != nil { return fmt.Errorf("Unable to read Process32Ex.Egid: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &p.Ruid)
	if err != nil { return fmt.Errorf("Unable to read Process32Ex.Ruid: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &p.Rgid)
	if err != nil { return fmt.Errorf("Unable to read Process32Ex.Rgid: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &p.Sid)
	if err != nil { return fmt.Errorf("Unable to read Process32Ex.Sid: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &p.Tid.Port)
	if err != nil { return fmt.Errorf("Unable to read Process32Ex.Tid.Port: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &p.Tid.Ttype)
	if err != nil { return fmt.Errorf("Unable to read Process32Ex.Tid.Ttype: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &p.Tid.IpVers)
	if err != nil { return fmt.Errorf("Unable to read Process32Ex.Tid.IpVers: %v", err) }

	if p.Tid.IpVers == 0x10 {
		err = binary.Read(rdr, binary.BigEndian, &p.Tid.Addr6)
		if err != nil { return fmt.Errorf("Unable to read Process32Ex.Tid.Addr6: %v", err) }
	} else if p.Tid.IpVers == 0x04 {
		err = binary.Read(rdr, binary.BigEndian, &p.Tid.Addr4)
		if err != nil { return fmt.Errorf("Unable to read Process32Ex.Tid.Addr4: %v", err) }
	}

	return nil
}

func (p *Process32Ex) Print(file *os.File, delimiter string, flags int) {
	var auser	string
	var euser	string
	var egroup	string
	var ruser	string
	var rgroup	string
	var ip		string
	if PRT_NORESOLVE_USER == flags & PRT_NORESOLVE_USER {
		auser =		strconv.Itoa(int(p.Auid))
		euser =		strconv.Itoa(int(p.Euid))
		egroup =	strconv.Itoa(int(p.Egid))
		ruser =		strconv.Itoa(int(p.Ruid))
		rgroup =	strconv.Itoa(int(p.Rgid))
	} else {
		auser, _ =	getUserName(p.Auid)
		euser, _ =	getUserName(p.Euid)
		egroup, _ =	getGroupName(p.Egid)
		ruser, _ =	getUserName(p.Ruid)
		rgroup, _ =	getGroupName(p.Rgid)
	}
	
	if p.Tid.IpVers == 0x04 {
		ip = PrintIpv4FromInt(p.Tid.Addr4)
	} else {
		ip = PrintIpv6FromInt(p.Tid.Addr6)
	}

	fmt.Fprintf(file, "process_ex%s%s%s%s%s%s%s%s%s%s%s%v%s%v%s%v%s%s", delimiter, auser, delimiter, euser,
				delimiter, egroup, delimiter, ruser, delimiter, rgroup, delimiter, p.Sid, delimiter, p.Tid.Port, delimiter,
				p.Tid.Ttype, delimiter, ip)
	
	if 0 == (flags & PRT_ONELINE) {
		fmt.Fprintf(file, "\n")
	} else {
		fmt.Fprintf(file, "%s", delimiter)
	}
}

func NewSubject64(s Subject64) *Subject64 {
	return &Subject64{
		Auid:	s.Auid,
		Euid:	s.Euid,
		Egid:	s.Egid,
		Ruid:	s.Ruid,
		Rgid:	s.Rgid,
		Pid:	s.Pid,
		Sid:	s.Sid,
		Tid:	s.Tid,
	}
}

func (s *Subject64) GetType() uint8 {
	return AUT_SUBJECT64
}

func (s *Subject64) LoadFromBinary(rdr *bufio.Reader) error {
	err := binary.Read(rdr, binary.BigEndian, &s.Auid)
	if err != nil { return fmt.Errorf("Unable to read Sibject64.Auid: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &s.Euid)
	if err != nil { return fmt.Errorf("Unable to read Subject64.Euid: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &s.Egid)
	if err != nil { return fmt.Errorf("Unable to read Subject64.Egid: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &s.Ruid)
	if err != nil { return fmt.Errorf("Unable to read Subject64.Ruid: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &s.Rgid)
	if err != nil { return fmt.Errorf("Unable to read Subject64.Rgid: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &s.Sid)
	if err != nil { return fmt.Errorf("Unable to read Subject64.Sid: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &s.Tid)
	if err != nil { return fmt.Errorf("Unable to read Subject64.Tid: %v", err) }

	return nil
}

func (s *Subject64) Print(file *os.File, delimiter string, flags int) {
	var auser	string
	var euser	string
	var egroup	string
	var ruser	string
	var rgroup	string
	if PRT_NORESOLVE_USER == flags & PRT_NORESOLVE_USER {
		auser =		strconv.Itoa(int(s.Auid))
		euser =		strconv.Itoa(int(s.Euid))
		egroup =	strconv.Itoa(int(s.Egid))
		ruser =		strconv.Itoa(int(s.Ruid))
		rgroup =	strconv.Itoa(int(s.Rgid))
	} else {
		auser, _ =	getUserName(s.Auid)
		euser, _ =	getUserName(s.Euid)
		egroup, _ =	getGroupName(s.Egid)
		ruser, _ =	getUserName(s.Ruid)
		rgroup, _ =	getGroupName(s.Rgid)
	}
	fmt.Fprintf(file, "subject%s%s%s%s%s%s%s%s%s%s%s%v%s%v%s%v%s%s", delimiter, auser, delimiter, euser, delimiter, egroup,
				delimiter, ruser, delimiter, rgroup, delimiter, s.Sid, delimiter, s.Tid.Port, delimiter, s.Tid.IpVers,
				delimiter, PrintIpv4FromInt(s.Tid.Addr))
	if 0 == (flags & PRT_ONELINE) {
		fmt.Fprintf(file, "\n")
	} else {
		fmt.Fprintf(file, "%s", delimiter)
	}
}

func NewProcess64(p Process64) *Process64 {
	return &Process64{
		Auid:	p.Auid,
		Euid:	p.Euid,
		Egid:	p.Egid,
		Ruid:	p.Ruid,
		Rgid:	p.Rgid,
		Pid:	p.Pid,
		Sid:	p.Sid,
		Tid:	p.Tid,
	}
}

func (s *Process64) GetType() uint8 {
	return AUT_PROCESS64
}

func (p *Process64) LoadFromBinary(rdr *bufio.Reader) error {
	err := binary.Read(rdr, binary.BigEndian, &p.Auid)
	if err != nil { return fmt.Errorf("Unable to read Process64.Auid: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &p.Euid)
	if err != nil { return fmt.Errorf("Unable to read Process64.Euid: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &p.Egid)
	if err != nil { return fmt.Errorf("Unable to read Process64.Egid: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &p.Ruid)
	if err != nil { return fmt.Errorf("Unable to read Process64.Ruid: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &p.Rgid)
	if err != nil { return fmt.Errorf("Unable to read Process64.Rgid: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &p.Sid)
	if err != nil { return fmt.Errorf("Unable to read Process64.Sid: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &p.Tid)
	if err != nil { return fmt.Errorf("Unable to read Process64.Tid: %v", err) }

	return nil
}

func (p *Process64) Print(file *os.File, delimiter string, flags int) {
	var auser	string
	var euser	string
	var egroup	string
	var ruser	string
	var rgroup	string
	if PRT_NORESOLVE_USER == flags & PRT_NORESOLVE_USER {
		auser =		strconv.Itoa(int(p.Auid))
		euser =		strconv.Itoa(int(p.Euid))
		egroup =	strconv.Itoa(int(p.Egid))
		ruser =		strconv.Itoa(int(p.Ruid))
		rgroup =	strconv.Itoa(int(p.Rgid))
	} else {
		auser, _ =	getUserName(p.Auid)
		euser, _ =	getUserName(p.Euid)
		egroup, _ =	getGroupName(p.Egid)
		ruser, _ =	getUserName(p.Ruid)
		rgroup, _ =	getGroupName(p.Rgid)
	}
	fmt.Fprintf(file, "process%s%s%s%s%s%s%s%s%s%s%s%v%s%v%s%v%s%s", delimiter, auser, delimiter, euser, delimiter, egroup,
				delimiter, ruser, delimiter, rgroup, delimiter, p.Sid, delimiter, p.Tid.Port, delimiter, p.Tid.IpVers,
				delimiter, PrintIpv4FromInt(p.Tid.Addr))
	if 0 == (flags & PRT_ONELINE) {
		fmt.Fprintf(file, "\n")
	} else {
		fmt.Fprintf(file, "%s", delimiter)
	}
}

func NewSubject64Ex(s Subject64Ex) *Subject64Ex {
	return &Subject64Ex{
		Auid:	s.Auid,
		Euid:	s.Euid,
		Egid:	s.Egid,
		Ruid:	s.Ruid,
		Rgid:	s.Rgid,
		Pid:	s.Pid,
		Sid:	s.Sid,
		Tid:	s.Tid,
	}
}

func (s *Subject64Ex) GetType() uint8 {
	return AUT_SUBJECT64_EX
}

func (s *Subject64Ex) LoadFromBinary(rdr *bufio.Reader) error {
	err := binary.Read(rdr, binary.BigEndian, &s.Auid)
	if err != nil { return fmt.Errorf("Unable to read Subject64Ex.Auid: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &s.Euid)
	if err != nil { return fmt.Errorf("Unable to read Subject64Ex.Euid: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &s.Egid)
	if err != nil { return fmt.Errorf("Unable to read Subject64Ex.Egid: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &s.Ruid)
	if err != nil { return fmt.Errorf("Unable to read Subject64Ex.Ruid: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &s.Rgid)
	if err != nil { return fmt.Errorf("Unable to read Subject64Ex.Rgid: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &s.Sid)
	if err != nil { return fmt.Errorf("Unable to read Subject64Ex.Sid: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &s.Tid.Port)
	if err != nil { return fmt.Errorf("Unable to read Subject64Ex.Tid.Port: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &s.Tid.Ttype)
	if err != nil { return fmt.Errorf("Unable to read Subject64Ex.Tid.Ttype: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &s.Tid.IpVers)
	if err != nil { return fmt.Errorf("Unable to read Subject64Ex.Tid.IpVers: %v", err) }

	if s.Tid.IpVers == 0x10 {
		err = binary.Read(rdr, binary.BigEndian, &s.Tid.Addr6)
		if err != nil { return fmt.Errorf("Unable to read Subject64Ex.Tid.Addr6: %v", err) }
	} else if s.Tid.IpVers == 0x04 {
		err = binary.Read(rdr, binary.BigEndian, &s.Tid.Addr4)
		if err != nil { return fmt.Errorf("Unable to read Subject64Ex.Tid.Addr4: %v", err) }
	}

	return nil
}

func (s *Subject64Ex) Print(file *os.File, delimiter string, flags int) {
	var auser	string
	var euser	string
	var egroup	string
	var ruser	string
	var rgroup	string
	var ip		string
	if PRT_NORESOLVE_USER == flags & PRT_NORESOLVE_USER {
		auser =		strconv.Itoa(int(s.Auid))
		euser =		strconv.Itoa(int(s.Euid))
		egroup =	strconv.Itoa(int(s.Egid))
		ruser =		strconv.Itoa(int(s.Ruid))
		rgroup =	strconv.Itoa(int(s.Rgid))
	} else {
		auser, _ =	getUserName(s.Auid)
		euser, _ =	getUserName(s.Euid)
		egroup, _ =	getGroupName(s.Egid)
		ruser, _ =	getUserName(s.Ruid)
		rgroup, _ =	getGroupName(s.Rgid)
	}
	if s.Tid.IpVers == 0x04 {
		ip = PrintIpv4FromInt(s.Tid.Addr4)
	} else {
		ip = PrintIpv6FromInt(s.Tid.Addr6)
	}

	fmt.Fprintf(file, "subject_ex%s%s%s%s%s%s%s%s%s%s%s%v%s%v%s%v%s%s", delimiter, auser, delimiter, euser,
				delimiter, egroup, delimiter, ruser, delimiter, rgroup, delimiter, s.Sid, delimiter, s.Tid.Port, delimiter,
				s.Tid.Ttype, delimiter, ip)
	
	if 0 == (flags & PRT_ONELINE) {
		fmt.Fprintf(file, "\n")
	} else {
		fmt.Fprintf(file, "%s", delimiter)
	}
}

func NewProcess64Ex(p Process64Ex) *Process64Ex {
	return &Process64Ex{
		Auid:	p.Auid,
		Euid:	p.Euid,
		Egid:	p.Egid,
		Ruid:	p.Ruid,
		Rgid:	p.Rgid,
		Pid:	p.Pid,
		Sid:	p.Sid,
		Tid:	p.Tid,
	}
}

func (p *Process64Ex) GetType() uint8 {
	return AUT_PROCESS64_EX
}

func (p *Process64Ex) LoadFromBinary(rdr *bufio.Reader) error {
	err := binary.Read(rdr, binary.BigEndian, &p.Auid)
	if err != nil { return fmt.Errorf("Unable to read Process64Ex.Auid: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &p.Euid)
	if err != nil { return fmt.Errorf("Unable to read Process64Ex.Euid: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &p.Egid)
	if err != nil { return fmt.Errorf("Unable to read Process64Ex.Egid: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &p.Ruid)
	if err != nil { return fmt.Errorf("Unable to read Process64Ex.Ruid: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &p.Rgid)
	if err != nil { return fmt.Errorf("Unable to read Process64Ex.Rgid: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &p.Sid)
	if err != nil { return fmt.Errorf("Unable to read Process64Ex.Sid: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &p.Tid.Port)
	if err != nil { return fmt.Errorf("Unable to read Process64Ex.Tid.Port: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &p.Tid.Ttype)
	if err != nil { return fmt.Errorf("Unable to read Process64Ex.Tid.Ttype: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &p.Tid.IpVers)
	if err != nil { return fmt.Errorf("Unable to read Process64Ex.Tid.IpVers: %v", err) }

	if p.Tid.IpVers == 0x10 {
		err = binary.Read(rdr, binary.BigEndian, &p.Tid.Addr6)
		if err != nil { return fmt.Errorf("Unable to read Process64Ex.Tid.Addr6: %v", err) }
	} else if p.Tid.IpVers == 0x04 {
		err = binary.Read(rdr, binary.BigEndian, &p.Tid.Addr4)
		if err != nil { return fmt.Errorf("Unable to read Process64Ex.Tid.Addr4: %v", err) }
	}

	return nil
}

func (p *Process64Ex) Print(file *os.File, delimiter string, flags int) {
	var auser	string
	var euser	string
	var egroup	string
	var ruser	string
	var rgroup	string
	var ip		string
	if PRT_NORESOLVE_USER == flags & PRT_NORESOLVE_USER {
		auser =		strconv.Itoa(int(p.Auid))
		euser =		strconv.Itoa(int(p.Euid))
		egroup =	strconv.Itoa(int(p.Egid))
		ruser =		strconv.Itoa(int(p.Ruid))
		rgroup =	strconv.Itoa(int(p.Rgid))
	} else {
		auser, _ =	getUserName(p.Auid)
		euser, _ =	getUserName(p.Euid)
		egroup, _ =	getGroupName(p.Egid)
		ruser, _ =	getUserName(p.Ruid)
		rgroup, _ =	getGroupName(p.Rgid)
	}
	if p.Tid.IpVers == 0x04 {
		ip = PrintIpv4FromInt(p.Tid.Addr4)
	} else {
		ip = PrintIpv6FromInt(p.Tid.Addr6)
	}

	fmt.Fprintf(file, "process_ex%s%s%s%s%s%s%s%s%s%s%s%v%s%v%s%v%s%s", delimiter, auser, delimiter, euser,
				delimiter, egroup, delimiter, ruser, delimiter, rgroup, delimiter, p.Sid, delimiter, p.Tid.Port, delimiter,
				p.Tid.Ttype, delimiter, ip)
	
	if 0 == (flags & PRT_ONELINE) {
		fmt.Fprintf(file, "\n")
	} else {
		fmt.Fprintf(file, "%s", delimiter)
	}
}

func NewReturn32(r Return32) *Return32 {
	return &Return32{
		Status:	r.Status,
		Ret:	r.Ret,
	}
}

func (r *Return32) GetType() uint8 {
	return AUT_RETURN32
}

func (r *Return32) LoadFromBinary(rdr *bufio.Reader) error {
	err := binary.Read(rdr, binary.BigEndian, &r.Status)
	if err != nil { return fmt.Errorf("Unable to read Return32.Status: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &r.Ret)
	if err != nil { return fmt.Errorf("Unable to read Return32.Ret: %v", err) }

	return nil
}

func (r *Return32) Print(file *os.File, delimiter string, flags int) {
	fmt.Fprintf(file, "return%s%v%s%v", delimiter, r.Status, delimiter, r.Ret)
	if 0 == (flags & PRT_ONELINE) {
		fmt.Fprintf(file, "\n")
	} else {
		fmt.Fprintf(file, "%s", delimiter)
	}
}

func NewReturn64(r Return64) *Return64 {
	return &Return64{
		Status:	r.Status,
		Ret:	r.Ret,
	}
}

func (r *Return64) GetType() uint8 {
	return AUT_RETURN64
}

func (r *Return64) LoadFromBinary(rdr *bufio.Reader) error {
	err := binary.Read(rdr, binary.BigEndian, &r.Status)
	if err != nil { return fmt.Errorf("Unable to read Return64.Status: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &r.Ret)
	if err != nil { return fmt.Errorf("Unable to read Return64.Ret: %v", err) }

	return nil
}

func (r *Return64) Print(file *os.File, delimiter string, flags int) {
	fmt.Fprintf(file, "return%s%v%s%v", delimiter, r.Status, delimiter, r.Ret)
	if 0 == (flags & PRT_ONELINE) {
		fmt.Fprintf(file, "\n")
	} else {
		fmt.Fprintf(file, "%s", delimiter)
	}
}

func NewTrailer(t Trailer) *Trailer {
	return &Trailer{
		Magic:	t.Magic,
		Count:	t.Count,
	}
}

func (t *Trailer) GetType() uint8 {
	return AUT_TRAILER
}

func (t *Trailer) LoadFromBinary(rdr *bufio.Reader) error {
	err := binary.Read(rdr, binary.BigEndian, &t.Magic)
	if err != nil { return fmt.Errorf("Unable to read Trailer.Magic: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &t.Count)
	if err != nil { return fmt.Errorf("Unable to read Trailer.Count: %v", err) }

	return nil
}

func (t *Trailer) Print(file *os.File, delimiter string, flags int) {
	fmt.Fprintf(file, "trailer%s%v", delimiter, t.Count)
// The trailer close the record print, whatever the oneLine flag value
	fmt.Fprintf(file, "\n")
}

func NewArg32(a Arg32) *Arg32 {
	return &Arg32{
		No:		a.No,
		Val:	a.Val,
		Length:	a.Length,
		Text:	a.Text,
	}
}

func (a *Arg32) GetType() uint8 {
	return AUT_ARG32
}

func (a *Arg32) LoadFromBinary(rdr *bufio.Reader) error {
	err := binary.Read(rdr, binary.BigEndian, &a.No)
	if err != nil { return fmt.Errorf("Unable to read Arg32.No: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &a.Val)
	if err != nil { return fmt.Errorf("Unable to read Arg32.Val: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &a.Length)
	if err != nil { return fmt.Errorf("Unable to read Arg32.Length: %v", err) }

	// Search for null terminating byte
	arg, err := rdr.ReadBytes((byte)(0x00))
	if err != nil {
		return fmt.Errorf("Error searching for null terminated path: %v", err)
	}
	a.Text = arg[:len(arg)-1]

	return nil
}

func (a *Arg32) Print(file *os.File, delimiter string, flags int) {
	fmt.Fprintf(file, "argument%s%v%s%v%s%s", delimiter, a.No, delimiter, a.Val, delimiter, string(a.Text))
	if 0 == (flags & PRT_ONELINE) {
		fmt.Fprintf(file, "\n")
	} else {
		fmt.Fprintf(file, "%s", delimiter)
	}
}

func NewArg64(a Arg64) *Arg64 {
	return &Arg64{
		No:		a.No,
		Val:	a.Val,
		Length:	a.Length,
		Text:	a.Text,
	}
}

func (a *Arg64) GetType() uint8 {
	return AUT_ARG64
}

func (a *Arg64) LoadFromBinary(rdr *bufio.Reader) error {
	err := binary.Read(rdr, binary.BigEndian, &a.No)
	if err != nil { return fmt.Errorf("Unable to read Arg64.No: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &a.Val)
	if err != nil { return fmt.Errorf("Unable to read Arg64.Val: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &a.Length)
	if err != nil { return fmt.Errorf("Unable to read Arg64.Length: %v", err) }

	// Search for null terminating byte
	arg, err := rdr.ReadBytes((byte)(0x00))
	if err != nil {
		return fmt.Errorf("Error searching for null terminated path: %v", err)
	}
	a.Text = arg[:len(arg)-1]

	return nil
}

func (a *Arg64) Print(file *os.File, delimiter string, flags int) {
	fmt.Fprintf(file, "argument%s%v%s%v%s%s", delimiter, a.No, delimiter, a.Val, delimiter, string(a.Text))
	if 0 == (flags & PRT_ONELINE) {
		fmt.Fprintf(file, "\n")
	} else {
		fmt.Fprintf(file, "%s", delimiter)
	}
}

func NewExit(e Exit) *Exit {
	return &Exit{
		Status:	e.Status,
		Ret:	e.Ret,
	}
}

func (e *Exit) GetType() uint8 {
	return AUT_EXIT
}

func (e *Exit) LoadFromBinary(rdr *bufio.Reader) error {
	err := binary.Read(rdr, binary.BigEndian, &e.Status)
	if err != nil { return fmt.Errorf("Unable to read Exit.Status: %v", err) }

	err = binary.Read(rdr, binary.BigEndian, &e.Ret)
	if err != nil { return fmt.Errorf("Unable to read Exit.Ret: %v", err) }

	return nil
}

func (e *Exit) Print(file *os.File, delimiter string, flags int) {
	fmt.Fprintf(file, "exit%s%v%s%v", delimiter, e.Status, delimiter, e.Ret)
	if 0 == (flags & PRT_ONELINE) {
		fmt.Fprintf(file, "\n")
	} else {
		fmt.Fprintf(file, "%s", delimiter)
	}
}

func NewText(t Text) *Text {
	return &Text{
		Length:	t.Length,
		Text:	t.Text,
	}
}

func (t *Text) GetType() uint8 {
	return AUT_TEXT
}

func (t *Text) LoadFromBinary(rdr *bufio.Reader) error {
	err := binary.Read(rdr, binary.BigEndian, &t.Length)
	if err != nil { return fmt.Errorf("Unable to read Text.Length: %v", err) }


	text := make([]byte, t.Length)
	err = binary.Read(rdr, binary.BigEndian, &text)
	if err != nil { return fmt.Errorf("Unable to read Text.Text: %v", err) }
	t.Text = text[:len(text)-1]

	return nil
}

func (t *Text) Print(file *os.File, delimiter string, flags int) {
	fmt.Fprintf(file, "text%s%s", delimiter, t.Text)
	if 0 == (flags & PRT_ONELINE) {
		fmt.Fprintf(file, "\n")
	} else {
		fmt.Fprintf(file, "%s", delimiter)
	}
}

func readRecordToStruct(reader *bufio.Reader) (Record, error) {
	var rec Record

	hdr := make([]byte, 1)
	n, err := reader.Read(hdr)
	if err != nil || n < 1 {
		if err != io.EOF {
			return rec, fmt.Errorf("Unable to read header ID: %v", err)
		}
		return rec, err
	}

	switch (int8)(hdr[0]) {
		case AUT_HEADER32:
			var h Header32
			err := h.LoadFromBinary(reader)
			if err != nil { return rec, fmt.Errorf("Unable to read: %v", err) }
			return NewHeader32(h), nil
		case AUT_EXEC_ARGS:
			var e ExecArg
			err := e.LoadFromBinary(reader)
			if err != nil { return rec, fmt.Errorf("Unable to read: %v", err) }
			return NewExecArg(e), nil
		case AUT_PATH:
			var p Path
			err := p.LoadFromBinary(reader)
			if err != nil { return rec, fmt.Errorf("Unable to read: %v", err) }
			return NewPath(p), nil
		case AUT_ATTR32:
			var a Attribute32
			err := a.LoadFromBinary(reader)
			if err != nil { return rec, fmt.Errorf("Unable to read: %v", err) }
			return NewAttribute32(a), nil
		case AUT_ATTR64:
			var a Attribute64
			err := a.LoadFromBinary(reader)
			if err != nil { return rec, fmt.Errorf("Unable to read: %v", err) }
			return NewAttribute64(a), nil
		case AUT_SUBJECT32:
			var s Subject32
			err := s.LoadFromBinary(reader)
			if err != nil { return rec, fmt.Errorf("Unable to read: %v", err) }
			return NewSubject32(s), nil
		case AUT_SUBJECT32_EX:
			var s Subject32Ex
			err := s.LoadFromBinary(reader)
			if err != nil { return rec, fmt.Errorf("Unable to read: %v", err) }
			return NewSubject32Ex(s), nil
		case AUT_RETURN32:
			var r Return32
			err := r.LoadFromBinary(reader)
			if err != nil { return rec, fmt.Errorf("Unable to read: %v", err) }
			return NewReturn32(r), nil
		case AUT_TRAILER:
			var t Trailer
			err := t.LoadFromBinary(reader)
			if err != nil { return rec, fmt.Errorf("Unable to read: %v", err) }
			return NewTrailer(t), nil
		case AUT_ARG32:
			var a Arg32
			err := a.LoadFromBinary(reader)
			if err != nil { return rec, fmt.Errorf("Unable to read: %v", err) }
			return NewArg32(a), nil
		case AUT_ARG64:
			var a Arg64
			err := a.LoadFromBinary(reader)
			if err != nil { return rec, fmt.Errorf("Unable to read: %v", err) }
			return NewArg64(a), nil
		case AUT_EXIT:
			var e Exit
			err := e.LoadFromBinary(reader)
			if err != nil { return rec, fmt.Errorf("Unable to read: %v", err) }
			return NewExit(e), nil
		case AUT_PROCESS32:
			var p Process32
			err := p.LoadFromBinary(reader)
			if err != nil { return rec, fmt.Errorf("Unable to read: %v", err) }
			return NewProcess32(p), nil
		case AUT_PROCESS32_EX:
			var p Process32Ex
			err := p.LoadFromBinary(reader)
			if err != nil { return rec, fmt.Errorf("Unable to read: %v", err) }
			return NewProcess32Ex(p), nil
		case AUT_PROCESS64:
			var p Process64
			err := p.LoadFromBinary(reader)
			if err != nil { return rec, fmt.Errorf("Unable to read: %v", err) }
			return NewProcess64(p), nil
		case AUT_PROCESS64_EX:
			var p Process64Ex
			err := p.LoadFromBinary(reader)
			if err != nil { return rec, fmt.Errorf("Unable to read: %v", err) }
			return NewProcess64Ex(p), nil
		case AUT_TEXT:
			var t Text
			err := t.LoadFromBinary(reader)
			if err != nil { return rec, fmt.Errorf("Unable to read: %v", err) }
			return NewText(t), nil
	}

	return rec, fmt.Errorf("Event type not supported: 0x%x", hdr[0])
}


/* Implementation of 
	int au_read_rec(FILE *fp, u_char **buf)

 source: https://github.com/freebsd/freebsd-src/blob/main/contrib/openbsm/libbsm/bsm_io.c
*/
func readRecord(file *os.File) ([]byte, error) {
	var buf *bytes.Buffer
	var recSize int32

	hdr := make([]byte, 1)
	n, err := file.Read(hdr)
	if err != nil || n < 1 {
		return hdr, fmt.Errorf("Unable to read file")
	}

	//switch hdr.(int8) {
	switch (int8)(hdr[0]) {
		case AUT_HEADER32, AUT_HEADER32_EX, AUT_HEADER64, AUT_HEADER64_EX:
			err := binary.Read(file, binary.BigEndian, &recSize)
			if err != nil {
				return hdr, fmt.Errorf("Unable to read file")
			}

			/* Check for recsize sanity: We already read 32 bits + 8 bits */
			if recSize < (4 + 1) {
				return hdr, fmt.Errorf("Record size is corrupted: %d", recSize)
			}

			/* store the token contents already read, back to the buffer*/
			data := make([]byte, 0)
			buf = bytes.NewBuffer(data)
			err = binary.Write(buf, binary.BigEndian, (int8)(hdr[0]))
			if err != nil {
				return hdr, fmt.Errorf("Unable to concatenate header to data")
			}
			err = binary.Write(buf, binary.BigEndian, recSize)
			if err != nil {
				return hdr, fmt.Errorf("Unable to concatenate recordsize to existing data")
			}

			/* now read remaining record bytes */
			remainSize := recSize - (4 + 1)
			remain := make([]byte, remainSize)
			n, err = file.Read(remain)
			if err != nil || (int32)(n) < remainSize {
				return hdr, fmt.Errorf("Unable to read data from file")
			}
			n, err = buf.Write(remain)
			if err != nil {
				return hdr, fmt.Errorf("Unable to write data to buffer")
			}

		case AUT_OTHER_FILE32:
			var sec			int32
			var msec		int32
			var filenamelen	int16

			err := binary.Read(file, binary.BigEndian, &sec)
			if err != nil {
				return hdr, fmt.Errorf("Unable to read file")
			}
			err = binary.Read(file, binary.BigEndian, &msec)
			if err != nil {
				return hdr, fmt.Errorf("Unable to read file")
			}
			err = binary.Read(file, binary.BigEndian, &filenamelen)
			if err != nil {
				return hdr, fmt.Errorf("Unable to read file")
			}
			
			recSize = 1 + 4 + 4 + 2 + int32(filenamelen)
			data := make([]byte, 0)
			buf = bytes.NewBuffer(data)

			/* store the token contents already read, back to the buffer*/
			err = binary.Write(buf, binary.BigEndian, (int8)(hdr[0]))
			if err != nil {
				return hdr, fmt.Errorf("Unable to concatenate header to data")
			}
			err = binary.Write(buf, binary.BigEndian, sec)
			if err != nil {
				return hdr, fmt.Errorf("Unable to concatenate sec to data")
			}
			err = binary.Write(buf, binary.BigEndian, msec)
			if err != nil {
				return hdr, fmt.Errorf("Unable to concatenate msec to data")
			}
			err = binary.Write(buf, binary.BigEndian, filenamelen)
			if err != nil {
				return hdr, fmt.Errorf("Unable to concatenate filenamelen to data")
			}
		
			filename := make([]byte, filenamelen)
			n, err = file.Read(filename)
			if err != nil || n < int(filenamelen) {
				return hdr, fmt.Errorf("Unable to read filename from file")
			}
			n, err = buf.Write(filename)
			if err != nil {
				return hdr, fmt.Errorf("Unable to concatenate filename to buffer")
			}
		
		default:
			return hdr, fmt.Errorf("Record type not implemented: %v", hdr)
	}

	return buf.Bytes(), nil
}