/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * adt_token.c
 *
 * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 *
 * This file does not provide any user callable functions.  See adt.c
 */

#include <bsm/adt.h>
#include <bsm/adt_event.h>
#include <bsm/audit.h>

#include <adt_xlate.h>
#include <alloca.h>
#include <assert.h>
#include <netdb.h>
#include <priv.h>
#include <string.h>
#include <strings.h>
#include <stdlib.h>
#include <time.h>
#include <unistd.h>

#include <sys/priv_names.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <sys/vnode.h>

#include <tsol/label.h>

#ifdef  C2_DEBUG
#define DPRINTF(x) { (void) printf x; }
#define DFLUSH (void) fflush(stdout);

/* 0x + Classification + Compartments + end of string */
#define HEX_SIZE 2 + 2*2 + 2*32 + 1

static char *
dprt_label(m_label_t *label)
{
        static char     hex[HEX_SIZE];
        char            *direct = NULL;

        if (label_to_str(label, &direct, M_INTERNAL, DEF_NAMES) != 0) {
                adt_write_syslog("label_to_str(M_INTERNAL)", errno);
                return ("hex label failed");
        }
        (void) strlcpy(hex, direct, sizeof (hex));
        free(direct);
        return (hex);
}
#else   /* !C2_DEBUG */
#define DPRINTF(x)
#define DFLUSH
#endif  /* C2_DEBUG */

static adt_token_func_t adt_getTokenFunction(char);

static char     *empty = "";

/*
 * call adt_token_open() first and adt_token_close() last.
 *
 * au_open is sort of broken; it returns a -1 when out of memory that
 * you're supposed to ignore; au_write and au_close return without
 * doing anything when a -1 is passed.  This code sort of follows the
 * au_open model except that it calls syslog to indicate underlying
 * brokenness.  Other than that, -1 is ignored.
 */

void
adt_token_open(struct adt_event_state *event)
{
        static int      have_syslogged = 0;

        event->ae_event_handle = au_open();
        if (event->ae_event_handle < 0) {
                if (!have_syslogged) {
                        adt_write_syslog("au_open failed", ENOMEM);
                        have_syslogged = 1;
                }
        } else {
                have_syslogged = 0;
        }
}

/*
 * call generate_token for each token in the order you want the tokens
 * generated.
 */

void
adt_generate_token(struct entry *p_entry, void *p_data,
    struct adt_event_state *event)
{
        adt_token_func_t        p_func;

        assert((p_entry != NULL) && (p_data != NULL) && (event != NULL));

        p_func = adt_getTokenFunction(p_entry->en_token_id);
        assert(p_func != NULL);

        DPRINTF(("p_entry=%p, p_data=%p, offset=%llu, msgFmt=%s\n",
            (void *)p_entry, p_data, (long long)p_entry->en_offset,
            p_entry->en_msg_format));
        DFLUSH

        (*p_func)(p_entry->en_type_def,
            (char *)p_data + p_entry->en_offset, p_entry->en_required, event,
            p_entry->en_msg_format);
}

/* call this last */

int
adt_token_close(struct adt_event_state *event)
{
        int     rc;

        rc = au_close(event->ae_event_handle, AU_TO_WRITE,
            event->ae_internal_id);
        if (rc < 0)
                adt_write_syslog("au_close failed", errno);
        return (rc);
}

/*
 * one function per token -- see the jump table at the end of file
 */

/* ARGSUSED */
static void
adt_to_return(datadef *def, void *p_data, int required,
    struct adt_event_state *event, char *notUsed)
{

#ifdef _LP64
        (void) au_write(event->ae_event_handle,
            au_to_return64((int64_t)event->ae_rc, event->ae_type));
#else
        (void) au_write(event->ae_event_handle,
            au_to_return32((int32_t)event->ae_rc, event->ae_type));
#endif
}

/*
 * AUT_CMD
 *
 * the command line is described with argc and argv and the environment
 * with envp.  The envp list is NULL terminated and has no separate
 * counter; envp will be a NULL list unless the AUDIT_ARGE policy is
 * set.
 */

/* ARGSUSED */
static void
adt_to_cmd(datadef *def, void *p_data, int required,
    struct adt_event_state *event, char *notUsed)
{
        struct adt_internal_state       *sp = event->ae_session;
        int                             argc;
        char                            **argv;
        char                            **envp = NULL;

        argc = ((union convert *)p_data)->tint;
        p_data = adt_adjust_address(p_data, sizeof (int), sizeof (char **));
        argv = ((union convert *)p_data)->tchar2star;
        p_data = adt_adjust_address(p_data, sizeof (char **), sizeof (char **));

        if (sp->as_kernel_audit_policy & AUDIT_ARGE)
                envp = ((union convert *)p_data)->tchar2star;

        (void) au_write(event->ae_event_handle,
            au_to_cmd(argc, argv, envp));
}

/*
 * special case of AUT_CMD with 1 argument that is
 * a string showing the whole command and no envp
 */
/* ARGSUSED */
static void
adt_to_cmd1(datadef *def, void *p_data, int required,
    struct adt_event_state *event, char *notUsed)
{
        char    *string;

        string = ((union convert *)p_data)->tcharstar;

        if (string == NULL) {
                if (required) {
                        string = empty;
                } else {
                        return;
                }
        }
        /* argc is hardcoded as 1 */
        (void) au_write(event->ae_event_handle, au_to_cmd(1, &string,
            NULL));
}

/*
 * adt_to_tid   -- generic address (ip is only one defined at present)
 *      input:
 *              terminal type:  ADT_IPv4, ADT_IPv6...
 *              case: ADT_IPv4 or ADT_IPv6...
 *                      ip type
 *                      remote port
 *                      local port
 *                      address
 *              case: not defined...
 */
/* ARGSUSED */
static void
adt_to_tid(datadef *def, void *p_data, int required,
    struct adt_event_state *event, char *notUsed)
{
        au_generic_tid_t        tid;
        uint32_t                type;
        au_ip_t                 *ip;

        type = ((union convert *)p_data)->tuint32;

        switch (type) {
        case ADT_IPv4:
        case ADT_IPv6:
                p_data = adt_adjust_address(p_data, sizeof (uint32_t),
                    sizeof (uint32_t));

                tid.gt_type = AU_IPADR;
                ip = &(tid.gt_adr.at_ip);

                ip->at_type = (type == ADT_IPv4) ?
                    AU_IPv4 : AU_IPv6;

                ip->at_r_port = ((union convert *)p_data)->tuint16;
                p_data = adt_adjust_address(p_data, sizeof (uint16_t),
                    sizeof (uint16_t));

                ip->at_l_port = ((union convert *)p_data)->tuint16;

                /* arg3 is for the array element, not the array size */
                p_data = adt_adjust_address(p_data, sizeof (uint16_t),
                    sizeof (uint32_t));

                (void) memcpy(ip->at_addr, p_data, ip->at_type);
                break;
        default:
                adt_write_syslog("Invalid terminal id type", EINVAL);
                return;
        }
        (void) au_write(event->ae_event_handle, au_to_tid(&tid));
}

/*
 * au_to_frmi takes a char * that is the fmri.
 */
/* ARGSUSED */
static void
adt_to_frmi(datadef *def, void *p_data, int required,
    struct adt_event_state *event, char *notUsed)
{
        char            *fmri;

        DPRINTF(("  adt_to_fmri dd_datatype=%d\n", def->dd_datatype));

        fmri = ((union convert *)p_data)->tcharstar;

        if (fmri == NULL) {
                if (required) {
                        fmri = empty;
                } else {
                        return;
                }
        }
        DPRINTF(("  fmri=%s\n", fmri));
        (void) au_write(event->ae_event_handle, au_to_fmri(fmri));
}

/*
 * au_to_label takes an m_label_t * that is the label.
 */
/* ARGSUSED */
static void
adt_to_label(datadef *def, void *p_data, int required,
    struct adt_event_state *event, char *notUsed)
{
        m_label_t       *label;

        DPRINTF(("  adt_to_label dd_datatype=%d\n", def->dd_datatype));

        label = ((union convert *)p_data)->tm_label;

        if (label != NULL) {
                DPRINTF(("  label=%s\n", dprt_label(label)));
                DFLUSH
                (void) au_write(event->ae_event_handle, au_to_label(label));
        } else {
                DPRINTF(("  Null label\n"));
                if (required)
                        adt_write_syslog("adt_to_label no required label", 0);
        }
}

/*
 * au_to_newgroups takes a length and an array of gids
 * as input.  The input to adt_to_newgroups is a length
 * and a pointer to an array of gids.
 */

/* ARGSUSED */
static void
adt_to_newgroups(datadef *def, void *p_data, int required,
    struct adt_event_state *event, char *notUsed)
{
        int     n;
        gid_t   *groups;

        n = ((union convert *)p_data)->tint;
        if (n < 1) {
                if (required) {
                        n = 0;  /* in case negative n was passed */
                } else {
                        return;
                }
        }
        p_data = adt_adjust_address(p_data, sizeof (int), sizeof (int32_t *));

        groups = ((union convert *)p_data)->tgidstar;

        (void) au_write(event->ae_event_handle, au_to_newgroups(n, groups));
}

/* ARGSUSED */
static void
adt_to_path(datadef *def, void *p_data, int required,
    struct adt_event_state *event, char *notUsed)
{
        char    *path;

        path = ((union convert *)p_data)->tcharstar;

        if (path != NULL) {
                DPRINTF(("  path=%s\n", path));
                (void) au_write(event->ae_event_handle, au_to_path(path));
        } else {
                DPRINTF(("  Null path\n"));
                if (required) {
                        (void) au_write(event->ae_event_handle,
                            au_to_path(empty));
                }
        }
}

/*
 * dummy token id:  AUT_PATHLIST
 */

/* ARGSUSED */
static void
adt_to_pathlist(datadef *def, void *p_data, int required,
    struct adt_event_state *event, char *notUsed)
{
        char    *path;
        char    *working_buf;
        char    *pathlist;
        char    *last_str;

        pathlist = ((union convert *)p_data)->tcharstar;

        if (pathlist != NULL) {
                working_buf = strdup(pathlist);
                if (working_buf == NULL) {
                        adt_write_syslog("audit failure", errno);
                        if (required) {
                                (void) au_write(event->ae_event_handle,
                                    au_to_path(empty));
                        }
                        return;
                }
                for (path = strtok_r(working_buf, " ", &last_str);
                    path; path = strtok_r(NULL, " ", &last_str)) {
                        DPRINTF(("  path=%s\n", path));
                        (void) au_write(event->ae_event_handle,
                            au_to_path(path));
                }
        } else {
                DPRINTF(("  Null path list\n"));
                if (required)
                        (void) au_write(event->ae_event_handle,
                            au_to_path(empty));
        }
}

/*
 * AUT_PRIV
 */

/* ARGSUSED */
static void
adt_to_priv(datadef *def, void *p_data, int required,
    struct adt_event_state *event, const char *priv_type)
{
        priv_set_t      *privilege;

        privilege = ((union convert *)p_data)->tprivstar;

        if (privilege != NULL) {
                (void) au_write(event->ae_event_handle,
                    au_to_privset(priv_type, privilege));
        } else {
                if (required) {
                        DPRINTF(("  Null privilege\n"));
                        (void) au_write(event->ae_event_handle,
                            au_to_privset(empty, NULL));
                }
        }
}

/*
 * -AUT_PRIV_L  AUT_PRIV for a limit set
 */

/* ARGSUSED */
static void
adt_to_priv_limit(datadef *def, void *p_data, int required,
    struct adt_event_state *event, char *notUsed)
{
        adt_to_priv(def, p_data, required, event, PRIV_LIMIT);
}

/*
 * -AUT_PRIV_I  AUT_PRIV for an inherit set
 */

/* ARGSUSED */
static void
adt_to_priv_inherit(datadef *def, void *p_data, int required,
    struct adt_event_state *event, char *notUsed)
{
        adt_to_priv(def, p_data, required, event, PRIV_INHERITABLE);
}

/* ARGSUSED */
static void
adt_to_priv_effective(datadef *def, void *p_data, int required,
    struct adt_event_state *event, char *notUsed)
{
        adt_to_priv(def, p_data, required, event, PRIV_EFFECTIVE);
}

static void
getCharacteristics(struct auditpinfo_addr *info, pid_t *pid)
{
        int     rc;

        if (*pid == 0) {                /* getpinfo for this pid */
                info->ap_pid = getpid();
        } else {
                info->ap_pid = *pid;
        }

        rc = auditon(A_GETPINFO_ADDR, (caddr_t)info,
            sizeof (struct auditpinfo_addr));
        if (rc == -1) {
                info->ap_auid = AU_NOAUDITID;
                info->ap_asid = 0;
                (void) memset((void *)&(info->ap_termid), 0,
                    sizeof (au_tid_addr_t));
                info->ap_termid.at_type = AU_IPv4;
        }
}

/*
 * AUT_PROCESS
 *
 */

/* ARGSUSED */
static void
adt_to_process(datadef *def, void *p_data, int required,
    struct adt_event_state *event, char *notUsed)
{
        au_id_t                 auid;
        uid_t                   euid;
        gid_t                   egid;
        uid_t                   ruid;
        gid_t                   rgid;
        pid_t                   pid;
        au_asid_t               sid;
        au_tid_addr_t           *tid;
        struct auditpinfo_addr  info;

        auid = ((union convert *)p_data)->tuid;
        p_data = adt_adjust_address(p_data, sizeof (uid_t), sizeof (uid_t));
        euid = ((union convert *)p_data)->tuid;
        p_data = adt_adjust_address(p_data, sizeof (uid_t), sizeof (gid_t));
        egid = ((union convert *)p_data)->tgid;
        p_data = adt_adjust_address(p_data, sizeof (gid_t), sizeof (uid_t));
        ruid = ((union convert *)p_data)->tuid;
        p_data = adt_adjust_address(p_data, sizeof (uid_t), sizeof (gid_t));
        rgid = ((union convert *)p_data)->tgid;
        p_data = adt_adjust_address(p_data, sizeof (gid_t), sizeof (pid_t));
        pid  = ((union convert *)p_data)->tpid;
        p_data = adt_adjust_address(p_data, sizeof (pid_t), sizeof (uint32_t));
        sid  = ((union convert *)p_data)->tuint32;
        p_data = adt_adjust_address(p_data, sizeof (uint32_t),
            sizeof (au_tid_addr_t *));
        tid  = ((union convert *)p_data)->ttermid;

        getCharacteristics(&info, &pid);

        if (auid == AU_NOAUDITID)
                auid = info.ap_auid;

        if (euid == AU_NOAUDITID)
                euid = geteuid();

        if (egid == AU_NOAUDITID)
                egid = getegid();

        if (ruid == AU_NOAUDITID)
                ruid = getuid();

        if (rgid == AU_NOAUDITID)
                rgid = getgid();

        if (tid == NULL)
                tid = &(info.ap_termid);

        if (sid == 0)
                sid = info.ap_asid;

        if (pid == 0)
                pid = info.ap_pid;

        (void) au_write(event->ae_event_handle,
            au_to_process_ex(auid, euid, egid, ruid, rgid, pid, sid, tid));
}

/*
 * Generate subject information.
 * If labels are present, generate the subject label token.
 * If the group audit policy is set, generate the subject group token.
 *
 * The required flag does not apply here.
 *
 * Non-attributable records are indicated by an auid of AU_NOAUDITID;
 * no subject token or group token is generated for a non-attributable
 * record.
 */

/* ARGSUSED */
static void
adt_to_subject(datadef *def, void *p_data, int required,
    struct adt_event_state *event, char *notUsed)
{
        struct adt_internal_state       *sp = event->ae_session;

        if (sp->as_info.ai_auid == AU_NOAUDITID)
                return;

        assert(sp->as_have_user_data == ADT_HAVE_ALL);

        (void) au_write(event->ae_event_handle,
            au_to_subject_ex(sp->as_info.ai_auid,
            sp->as_euid, sp->as_egid, sp->as_ruid, sp->as_rgid,
            sp->as_pid, sp->as_info.ai_asid,
            &(sp->as_info.ai_termid)));
        if (is_system_labeled()) {
                (void) au_write(event->ae_event_handle,
                    au_to_label(sp->as_label));
        }
        /*
         * Add optional tokens if in the process model.
         * In a session model, the groups list is undefined and label
         * is in the state.
         */
        if (sp->as_session_model == ADT_PROCESS_MODEL) {
                if (sp->as_kernel_audit_policy & AUDIT_GROUP) {
                        int group_count;
                        int maxgrp = getgroups(0, NULL);
                        gid_t *grouplist = alloca(maxgrp * sizeof (gid_t));

                        if ((group_count = getgroups(maxgrp, grouplist)) > 0) {
                                (void) au_write(event->ae_event_handle,
                                    au_to_newgroups(group_count, grouplist));
                        }
                }
        }
}

/*
 * adt_to_text()
 *
 * The format string, normally null, is sort of a wrapper around
 * the input.  adt_write_text() is a wrapper around au_write that
 * handles the format string
 *
 */
#define TEXT_LENGTH 49

static void
adt_write_text(int handle, char *main_text, const char *format)
{
        char    buffer[TEXT_LENGTH * 2 + 1];

        if (format == NULL) {
                (void) au_write(handle, au_to_text(main_text));
        } else {
                (void) snprintf(buffer, TEXT_LENGTH * 2, format, main_text);
                (void) au_write(handle, au_to_text(buffer));
        }
}

static void
adt_to_text(datadef *def, void *p_data, int required,
    struct adt_event_state *event, char *format)
{
        static int      have_syslogged = 0;
        char            *string;
        char            **string_list;
        char            buffer[TEXT_LENGTH + 1];
        time_t          date;
        struct tm       tm;
        uint32_t        *int_list;
        int             written, available;
        int             i, arrayCount;
        struct msg_text *list;
        int             list_index;

        DPRINTF(("  adt_to_text dd_datatype=%d\n", def->dd_datatype));
        switch (def->dd_datatype) {
        case ADT_DATE:
                /*
                 * Consider creating a separate token type for dates
                 * -- store as longs and format them in praudit.
                 * For now, a date is input as a time_t and output as
                 * a text token.  If we do this, we need to consider
                 * carrying timezone info so that praudit can
                 * represent times in an unambiguous manner.
                 */
                date = ((union convert *)p_data)->tlong;
                if (strftime(buffer, sizeof (buffer), "%x",
                    localtime_r(&date, &tm)) > TEXT_LENGTH) {
                        if (required) {
                                (void) strncpy(buffer, "invalid date",
                                    TEXT_LENGTH);
                        } else {
                                break;
                        }
                }
                DPRINTF(("  text=%s\n", buffer));
                adt_write_text(event->ae_event_handle, buffer, format);
                break;
                /*
                 * The "input size" is overloaded to mean the list number
                 * and the msg_selector indexes the desired string in
                 * that list
                 */
        case ADT_MSG:
                list = &adt_msg_text[(enum adt_msg_list)def->dd_input_size];
                list_index = ((union convert *)p_data)->msg_selector;

                if ((list_index + list->ml_offset < list->ml_min_index) ||
                    (list_index + list->ml_offset > list->ml_max_index)) {
                        string = "Invalid message index";
                } else {
                        string = list->ml_msg_list[list_index +
                            list->ml_offset];
                }

                if (string == NULL) {   /* null is valid; means skip */
                        if (required) {
                                string = empty;
                        } else {
                                break;
                        }
                }
                DPRINTF(("  text=%s\n", string));
                adt_write_text(event->ae_event_handle, string, format);
                break;
        case ADT_UID:
        case ADT_GID:
        case ADT_UINT:
        case ADT_UINT32:
                (void) snprintf(buffer, TEXT_LENGTH, "%u",
                    ((union convert *)p_data)->tuint);

                DPRINTF(("  text=%s\n", buffer));
                adt_write_text(event->ae_event_handle, buffer, format);
                break;
        case ADT_INT:
        case ADT_INT32:
                (void) snprintf(buffer, TEXT_LENGTH, "%d",
                    ((union convert *)p_data)->tint);

                DPRINTF(("  text=%s\n", buffer));
                adt_write_text(event->ae_event_handle, buffer, format);
                break;
        case ADT_LONG:
                (void) snprintf(buffer, TEXT_LENGTH, "%ld",
                    ((union convert *)p_data)->tlong);

                DPRINTF(("  text=%s\n", buffer));
                adt_write_text(event->ae_event_handle, buffer, format);
                break;
        case ADT_UIDSTAR:
        case ADT_GIDSTAR:
        case ADT_UINT32STAR:
                int_list = ((union convert *)p_data)->tuint32star;
                p_data = adt_adjust_address(p_data, sizeof (int *),
                    sizeof (int));
                arrayCount = ((union convert *)p_data)->tint;

                string = buffer;
                available = TEXT_LENGTH;        /* space available in buffer */

                if (arrayCount < 0)
                        arrayCount = 0;

                if ((arrayCount > 0) && (int_list != NULL)) {
                        for (; arrayCount > 0; arrayCount--) {
                                written = snprintf(string, available,
                                    "%d ", *int_list++);
                                if (written < 1)
                                        break;
                                string += written;
                                available -= written;
                        }
                } else if (required) {
                        string = empty;
                } else {
                        break;
                }

                adt_write_text(event->ae_event_handle, buffer, format);
                break;
        case ADT_ULONG:
                (void) snprintf(buffer, TEXT_LENGTH, "%lu",
                    ((union convert *)p_data)->tulong);

                DPRINTF(("  text=%s\n", buffer));
                adt_write_text(event->ae_event_handle, buffer, format);
                break;
        case ADT_UINT64:
                (void) snprintf(buffer, TEXT_LENGTH, "%llu",
                    ((union convert *)p_data)->tuint64);

                DPRINTF(("  text=%s\n", buffer));
                adt_write_text(event->ae_event_handle, buffer, format);
                break;
        case ADT_CHARSTAR:
                string = ((union convert *)p_data)->tcharstar;

                if (string == NULL) {
                        if (required) {
                                string = empty;
                        } else {
                                break;
                        }
                }
                DPRINTF(("  text=%s\n", string));
                adt_write_text(event->ae_event_handle, string, format);
                break;
        case ADT_CHAR2STAR:
                string_list = ((union convert *)p_data)->tchar2star;
                p_data = adt_adjust_address(p_data, sizeof (char **),
                    sizeof (int));
                arrayCount = ((union convert *)p_data)->tint;

                if (arrayCount < 0)
                        arrayCount = 0;

                if ((arrayCount > 0) && (string_list != NULL)) {
                        for (i = 0; i < arrayCount; i++) {
                                string = string_list[i];
                                if (string != NULL)
                                        adt_write_text(event->ae_event_handle,
                                            string, format);
                        }
                } else if (required) {
                        adt_write_text(event->ae_event_handle, empty, format);
                } else {
                        break;
                }
                break;
        default:
                if (!have_syslogged) { /* don't flood the log */
                        adt_write_syslog("unsupported data conversion",
                            ENOTSUP);
                        have_syslogged = 1;
                }
                break;
        }
        DFLUSH
}

/*
 * AUT_UAUTH
 */

/* ARGSUSED */
static void
adt_to_uauth(datadef *def, void *p_data, int required,
    struct adt_event_state *event, char *format)
{
        char            *string;

        DPRINTF(("  adt_to_uauth dd_datatype=%d\n", def->dd_datatype));

        string = ((union convert *)p_data)->tcharstar;

        if (string == NULL) {
                if (required) {
                        string = empty;
                } else {
                        return;
                }
        }
        DPRINTF(("  text=%s\n", string));
        (void) au_write(event->ae_event_handle, au_to_uauth(string));
}

/*
 * AUT_USER
 */

/* ARGSUSED */
static void
adt_to_user(datadef *def, void *p_data, int required,
    struct adt_event_state *event, char *format)
{
        uid_t   uid;
        char    *username;

        DPRINTF(("  adt_to_user dd_datatype=%d\n", def->dd_datatype));

        uid = ((union convert *)p_data)->tuid;
        p_data = adt_adjust_address(p_data, sizeof (uid_t), sizeof (uid_t));

        username = ((union convert *)p_data)->tcharstar;

        if (username == NULL) {
                if (required) {
                        username = empty;
                } else {
                        return;
                }
        }
        DPRINTF(("  username=%s\n", username));
        (void) au_write(event->ae_event_handle, au_to_user(uid, username));
}

/*
 * AUT_ZONENAME
 */

/* ARGSUSED */
static void
adt_to_zonename(datadef *def, void *p_data, int required,
    struct adt_event_state *event, char *notUsed)
{
        char    *name;

        name = ((union convert *)p_data)->tcharstar;

        if (name != NULL) {
                DPRINTF(("  name=%s\n", name));
                (void) au_write(event->ae_event_handle, au_to_zonename(name));
        } else {
                DPRINTF(("  Null name\n"));
                if (required) {
                        (void) au_write(event->ae_event_handle,
                            au_to_zonename(empty));
                }
        }
}

/*
 * ADT_IN_PEER dummy token
 */

/* ARGSUSED */
static void
adt_to_in_peer(datadef *def, void *p_data, int required,
    struct adt_event_state *event, char *notUsed)
{
        int     sock;
        struct sockaddr_in6 peer;
        int     peerlen = sizeof (peer);

        DPRINTF(("    adt_to_in_peer dd_datatype=%d\n", def->dd_datatype));

        sock = ((union convert *)p_data)->tfd;

        if (sock < 0) {
                DPRINTF(("  Socket fd %d\n", sock));
                if (required) {
                        adt_write_syslog("adt_to_in_peer no required socket",
                            0);
                }
                return;
        }
        if (getpeername(sock, (struct sockaddr *)&peer, (socklen_t *)&peerlen)
            < 0) {

                adt_write_syslog("adt_to_in_addr getpeername", errno);
                return;
        }
        if (peer.sin6_family == AF_INET6) {
                (void) au_write(event->ae_event_handle,
                    au_to_in_addr_ex(&(peer.sin6_addr)));
                (void) au_write(event->ae_event_handle,
                    au_to_iport((ushort_t)peer.sin6_port));
        } else {
                (void) au_write(event->ae_event_handle,
                    au_to_in_addr(&(((struct sockaddr_in *)&peer)->sin_addr)));
                (void) au_write(event->ae_event_handle,
                    au_to_iport(
                    (ushort_t)(((struct sockaddr_in *)&peer)->sin_port)));
        }
}

/*
 * ADT_IN_REMOTE dummy token
 *
 * Similar to ADT_IN_PEER except the input is
 * an IP address type (ADT_IPv4 | ADT_IPv6) and an address V4/V6
 */

/* ARGSUSED */
static void
adt_to_in_remote(datadef *def, void *p_data, int required,
    struct adt_event_state *event, char *notUsed)
{
        int32_t type;

        DPRINTF(("    adt_to_in_remote dd_datatype=%d\n", def->dd_datatype));

        type = ((union convert *)p_data)->tuint32;

        if (type ==  0) {
                if (required == 0) {
                        return;
                }
                /* required and not specified */
                adt_write_syslog("adt_to_in_remote required address not "
                    "specified", 0);
                type = ADT_IPv4;
        }
        p_data = adt_adjust_address(p_data, sizeof (int32_t),
            sizeof (uint32_t));

        switch (type) {
        case ADT_IPv4:
                (void) au_write(event->ae_event_handle, au_to_in_addr(
                    (struct in_addr *)&(((union convert *)p_data)->tuint32)));
                break;
        case ADT_IPv6:
                (void) au_write(event->ae_event_handle, au_to_in_addr_ex(
                    (struct in6_addr *)&(((union convert *)p_data)->tuint32)));
                break;
        default:
                adt_write_syslog("adt_to_in_remote invalid type", EINVAL);
                return;
        }
}

/*
 * adt_to_iport takes a uint16_t IP port.
 */

/* ARGSUSED */
static void
adt_to_iport(datadef *def, void *p_data, int required,
    struct adt_event_state *event, char *notUsed)
{
        ushort_t port;

        DPRINTF(("  adt_to_iport dd_datatype=%d\n", def->dd_datatype));

        port = ((union convert *)p_data)->tuint16;

        if (port == 0) {
                if (required == 0) {
                        return;
                }
                /* required and not specified */
                adt_write_syslog("adt_to_iport no required port", 0);
        }
        (void) au_write(event->ae_event_handle, au_to_iport(port));

}


/*
 *      This is a compact table that defines only the tokens that are
 * actually generated in the adt.xml file.  It can't be a  pure
 * indexed table because the adt.xml language defines internal extension
 * tokens for some processing.  VIZ. ADT_CMD_ALT, ADT_AUT_PRIV_* (see
 * adt_xlate.h), and the -AUT_PATH value.
 */

#define MAX_TOKEN_JMP 21

static struct token_jmp token_table[MAX_TOKEN_JMP] =
{
        {AUT_CMD, adt_to_cmd},
        {ADT_CMD_ALT, adt_to_cmd1},
        {AUT_FMRI, adt_to_frmi},
        {ADT_IN_PEER, adt_to_in_peer},
        {ADT_IN_REMOTE, adt_to_in_remote},
        {AUT_IPORT, adt_to_iport},
        {AUT_LABEL, adt_to_label},
        {AUT_NEWGROUPS, adt_to_newgroups},
        {AUT_PATH, adt_to_path},
        {-AUT_PATH, adt_to_pathlist},   /* private extension of token values */
        {ADT_AUT_PRIV_L, adt_to_priv_limit},
        {ADT_AUT_PRIV_I, adt_to_priv_inherit},
        {ADT_AUT_PRIV_E, adt_to_priv_effective},
        {AUT_PROCESS, adt_to_process},
        {AUT_RETURN, adt_to_return},
        {AUT_SUBJECT, adt_to_subject},
        {AUT_TEXT, adt_to_text},
        {AUT_TID, adt_to_tid},
        {AUT_UAUTH, adt_to_uauth},
        {AUT_USER, adt_to_user},
        {AUT_ZONENAME, adt_to_zonename}
};

/*
 *      {AUT_ACL, adt_to_acl},                  not used
 *      {AUT_ARBITRARY, adt_to_arbitrary},      AUT_ARBITRARY is undefined
 *      {AUT_ARG, adt_to_arg},                  not used
 *      {AUT_ATTR, adt_to_attr},                not used in mountd
 *      {AUT_XATOM, adt_to_atom},               not used
 *      {AUT_EXEC_ARGS, adt_to_exec_args},      not used
 *      {AUT_EXEC_ENV, adt_to_exec_env},        not used
 *      {AUT_EXIT, adt_to_exit},                obsolete
 *      {AUT_FILE, adt_to_file},                AUT_FILE is undefined
 *      {AUT_XCOLORMAP, adt_to_colormap},       not used
 *      {AUT_XCURSOR, adt_to_cursor},           not used
 *      {AUT_XFONT, adt_to_font},               not used
 *      {AUT_XGC, adt_to_gc},                   not used
 *      {AUT_GROUPS, adt_to_groups},            obsolete
 *      {AUT_HEADER, adt_to_header},            generated by au_close
 *      {AUT_IP, adt_to_ip},                    not used
 *      {AUT_IPC, adt_to_ipc},                  not used
 *      {AUT_IPC_PERM, adt_to_ipc_perm},        not used
 *      {AUT_OPAQUE, adt_to_opaque},            not used
 *      {AUT_XPIXMAP, adt_to_pixmap},           not used
 *      {AUT_XPROPERTY, adt_to_property},       not used
 *      {AUT_SEQ, adt_to_seq},                  not used
 *      {AUT_SOCKET, adt_to_socket},            not used
 *      {AUT_SOCKET_INET, adt_to_socket_inet},  AUT_SOCKET_INET is undefined
 *      {AUT_TRAILER, adt_to_trailer},          generated by au_close
 *      {AUT_XCLIENT, adt_to_xclient}           not used
 */

/* find function to generate token */

static adt_token_func_t
adt_getTokenFunction(char token_id)
{
        int     i;
        struct token_jmp        *p_jmp = token_table;

        for (i = 0; i < MAX_TOKEN_JMP; i++) {
                if (token_id == p_jmp->jmp_id) {
                        return (p_jmp->jmp_to);
                }
                p_jmp++;
        }
        errno = EINVAL;
        return (NULL);
}

/*
 * adjustAddress -- given the address of data, its size, and the type of
 * the next data field, calculate the offset to the next piece of data.
 * Depending on the caller, "current" and "next" mean the current pointer
 * and the next pointer or the last pointer and the current pointer.
 */
void *
adt_adjust_address(void *current_address, size_t current_size,
    size_t next_size)
{
        ptrdiff_t adjustment;
        ptrdiff_t remainder;

        adjustment = (size_t)current_address + current_size;

        if (next_size) {
                remainder = adjustment % next_size;
                if (remainder != 0)
                        adjustment += next_size - remainder;
        }
        return ((char *)adjustment);
}