source: vendor/3.6.9/source3/lib/tldap_util.c

/*
   Unix SMB/CIFS implementation.
   Infrastructure for async ldap client requests
   Copyright (C) Volker Lendecke 2009

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#include "includes.h"
#include "tldap.h"
#include "tldap_util.h"
#include "../libcli/security/security.h"
#include "../lib/util/asn1.h"
#include "../librpc/ndr/libndr.h"

bool tldap_entry_values(struct tldap_message *msg, const char *attribute,
                        DATA_BLOB **values, int *num_values)
{
        struct tldap_attribute *attributes;
        int i, num_attributes;

        if (!tldap_entry_attributes(msg, &attributes, &num_attributes)) {
                return false;
        }

        for (i=0; i<num_attributes; i++) {
                if (strequal(attribute, attributes[i].name)) {
                        break;
                }
        }
        if (i == num_attributes) {
                return false;
        }
        *num_values = attributes[i].num_values;
        *values = attributes[i].values;
        return true;
}

bool tldap_get_single_valueblob(struct tldap_message *msg,
                                const char *attribute, DATA_BLOB *blob)
{
        int num_values;
        DATA_BLOB *values;

        if (attribute == NULL) {
                return NULL;
        }
        if (!tldap_entry_values(msg, attribute, &values, &num_values)) {
                return NULL;
        }
        if (num_values != 1) {
                return NULL;
        }
        *blob = values[0];
        return true;
}

char *tldap_talloc_single_attribute(struct tldap_message *msg,
                                    const char *attribute,
                                    TALLOC_CTX *mem_ctx)
{
        DATA_BLOB val;
        char *result;
        size_t len;

        if (!tldap_get_single_valueblob(msg, attribute, &val)) {
                return false;
        }
        if (!convert_string_talloc(mem_ctx, CH_UTF8, CH_UNIX,
                                   val.data, val.length,
                                   &result, &len, false)) {
                return NULL;
        }
        return result;
}

bool tldap_pull_binsid(struct tldap_message *msg, const char *attribute,
                       struct dom_sid *sid)
{
        DATA_BLOB val;

        if (!tldap_get_single_valueblob(msg, attribute, &val)) {
                return false;
        }
        return sid_parse((char *)val.data, val.length, sid);
}

bool tldap_pull_guid(struct tldap_message *msg, const char *attribute,
                     struct GUID *guid)
{
        DATA_BLOB val;

        if (!tldap_get_single_valueblob(msg, attribute, &val)) {
                return false;
        }
        return NT_STATUS_IS_OK(GUID_from_data_blob(&val, guid));
}

static bool tldap_add_blob_vals(TALLOC_CTX *mem_ctx, struct tldap_mod *mod,
                                DATA_BLOB *newvals, int num_newvals)
{
        int num_values = talloc_array_length(mod->values);
        int i;
        DATA_BLOB *tmp;

        tmp = talloc_realloc(mem_ctx, mod->values, DATA_BLOB,
                             num_values + num_newvals);
        if (tmp == NULL) {
                return false;
        }
        mod->values = tmp;

        for (i=0; i<num_newvals; i++) {
                mod->values[i+num_values].data = (uint8_t *)talloc_memdup(
                        mod->values, newvals[i].data, newvals[i].length);
                if (mod->values[i+num_values].data == NULL) {
                        return false;
                }
                mod->values[i+num_values].length = newvals[i].length;
        }
        mod->num_values = num_values + num_newvals;
        return true;
}

bool tldap_add_mod_blobs(TALLOC_CTX *mem_ctx,
                         struct tldap_mod **pmods, int *pnum_mods,
                         int mod_op, const char *attrib,
                         DATA_BLOB *newvals, int num_newvals)
{
        struct tldap_mod new_mod;
        struct tldap_mod *mods = *pmods;
        struct tldap_mod *mod = NULL;
        int i, num_mods;

        if (mods == NULL) {
                mods = talloc_array(mem_ctx, struct tldap_mod, 0);
        }
        if (mods == NULL) {
                return false;
        }

        num_mods = *pnum_mods;

        for (i=0; i<num_mods; i++) {
                if ((mods[i].mod_op == mod_op)
                    && strequal(mods[i].attribute, attrib)) {
                        mod = &mods[i];
                        break;
                }
        }

        if (mod == NULL) {
                new_mod.mod_op = mod_op;
                new_mod.attribute = talloc_strdup(mods, attrib);
                if (new_mod.attribute == NULL) {
                        return false;
                }
                new_mod.num_values = 0;
                new_mod.values = NULL;
                mod = &new_mod;
        }

        if ((num_newvals != 0)
            && !tldap_add_blob_vals(mods, mod, newvals, num_newvals)) {
                return false;
        }

        if ((i == num_mods) && (talloc_array_length(mods) < num_mods + 1)) {
                mods = talloc_realloc(talloc_tos(), mods, struct tldap_mod,
                                      num_mods+1);
                if (mods == NULL) {
                        return false;
                }
                mods[num_mods] = *mod;
        }

        *pmods = mods;
        *pnum_mods += 1;
        return true;
}

bool tldap_add_mod_str(TALLOC_CTX *mem_ctx,
                       struct tldap_mod **pmods, int *pnum_mods,
                       int mod_op, const char *attrib, const char *str)
{
        DATA_BLOB utf8;
        bool ret;

        if (!convert_string_talloc(talloc_tos(), CH_UNIX, CH_UTF8, str,
                                   strlen(str), &utf8.data, &utf8.length,
                                   false)) {
                return false;
        }

        ret = tldap_add_mod_blobs(mem_ctx, pmods, pnum_mods, mod_op, attrib,
                                  &utf8, 1);
        TALLOC_FREE(utf8.data);
        return ret;
}

static bool tldap_make_mod_blob_int(struct tldap_message *existing,
                                    TALLOC_CTX *mem_ctx,
                                    struct tldap_mod **pmods, int *pnum_mods,
                                    const char *attrib, DATA_BLOB newval,
                                    int (*comparison)(const DATA_BLOB *d1,
                                                      const DATA_BLOB *d2))
{
        int num_values = 0;
        DATA_BLOB *values = NULL;
        DATA_BLOB oldval = data_blob_null;

        if ((existing != NULL)
            && tldap_entry_values(existing, attrib, &values, &num_values)) {

                if (num_values > 1) {
                        /* can't change multivalue attributes atm */
                        return false;
                }
                if (num_values == 1) {
                        oldval = values[0];
                }
        }

        if ((oldval.data != NULL) && (newval.data != NULL)
            && (comparison(&oldval, &newval) == 0)) {
                /* Believe it or not, but LDAP will deny a delete and
                   an add at the same time if the values are the
                   same... */
                DEBUG(10,("tldap_make_mod_blob_int: attribute |%s| not "
                          "changed.\n", attrib));
                return true;
        }

        if (oldval.data != NULL) {
                /* By deleting exactly the value we found in the entry this
                 * should be race-free in the sense that the LDAP-Server will
                 * deny the complete operation if somebody changed the
                 * attribute behind our back. */
                /* This will also allow modifying single valued attributes in
                 * Novell NDS. In NDS you have to first remove attribute and
                 * then you could add new value */

                DEBUG(10, ("tldap_make_mod_blob_int: deleting attribute |%s|\n",
                           attrib));
                if (!tldap_add_mod_blobs(mem_ctx, pmods, pnum_mods,
                                         TLDAP_MOD_DELETE,
                                         attrib, &oldval, 1)) {
                        return false;
                }
        }

        /* Regardless of the real operation (add or modify)
           we add the new value here. We rely on deleting
           the old value, should it exist. */

        if (newval.data != NULL) {
                DEBUG(10, ("tldap_make_mod_blob_int: adding attribute |%s| value len "
                           "%d\n", attrib, (int)newval.length));
                if (!tldap_add_mod_blobs(mem_ctx, pmods, pnum_mods,
                                         TLDAP_MOD_ADD,
                                         attrib, &newval, 1)) {
                        return false;
                }
        }
        return true;
}

bool tldap_make_mod_blob(struct tldap_message *existing, TALLOC_CTX *mem_ctx,
                         struct tldap_mod **pmods, int *pnum_mods,
                         const char *attrib, DATA_BLOB newval)
{
        return tldap_make_mod_blob_int(existing, mem_ctx, pmods, pnum_mods,
                                       attrib, newval, data_blob_cmp);
}

static int compare_utf8_blobs(const DATA_BLOB *d1, const DATA_BLOB *d2)
{
        char *s1, *s2;
        size_t s1len, s2len;
        int ret;

        if (!convert_string_talloc(talloc_tos(), CH_UTF8, CH_UNIX, d1->data,
                                   d1->length, &s1, &s1len, false)) {
                /* can't do much here */
                return 0;
        }
        if (!convert_string_talloc(talloc_tos(), CH_UTF8, CH_UNIX, d2->data,
                                   d2->length, &s2, &s2len, false)) {
                /* can't do much here */
                TALLOC_FREE(s1);
                return 0;
        }
        ret = StrCaseCmp(s1, s2);
        TALLOC_FREE(s2);
        TALLOC_FREE(s1);
        return ret;
}

bool tldap_make_mod_fmt(struct tldap_message *existing, TALLOC_CTX *mem_ctx,
                        struct tldap_mod **pmods, int *pnum_mods,
                        const char *attrib, const char *fmt, ...)
{
        va_list ap;
        char *newval;
        bool ret;
        DATA_BLOB blob = data_blob_null;

        va_start(ap, fmt);
        newval = talloc_vasprintf(talloc_tos(), fmt, ap);
        va_end(ap);

        if (newval == NULL) {
                return false;
        }

        blob.length = strlen(newval);
        if (blob.length != 0) {
                blob.data = CONST_DISCARD(uint8_t *, newval);
        }
        ret = tldap_make_mod_blob_int(existing, mem_ctx, pmods, pnum_mods,
                                      attrib, blob, compare_utf8_blobs);
        TALLOC_FREE(newval);
        return ret;
}

const char *tldap_errstr(TALLOC_CTX *mem_ctx, struct tldap_context *ld, int rc)
{
        const char *ld_error = NULL;
        char *res;

        if (ld != NULL) {
                ld_error = tldap_msg_diagnosticmessage(tldap_ctx_lastmsg(ld));
        }
        res = talloc_asprintf(mem_ctx, "LDAP error %d (%s), %s", rc,
                              tldap_err2string(rc),
                              ld_error ? ld_error : "unknown");
        return res;
}

int tldap_search_va(struct tldap_context *ld, const char *base, int scope,
                    const char *attrs[], int num_attrs, int attrsonly,
                    TALLOC_CTX *mem_ctx, struct tldap_message ***res,
                    const char *fmt, va_list ap)
{
        char *filter;
        int ret;

        filter = talloc_vasprintf(talloc_tos(), fmt, ap);
        if (filter == NULL) {
                return TLDAP_NO_MEMORY;
        }

        ret = tldap_search(ld, base, scope, filter,
                           attrs, num_attrs, attrsonly,
                           NULL /*sctrls*/, 0, NULL /*cctrls*/, 0,
                           0 /*timelimit*/, 0 /*sizelimit*/, 0 /*deref*/,
                           mem_ctx, res, NULL);
        TALLOC_FREE(filter);
        return ret;
}

int tldap_search_fmt(struct tldap_context *ld, const char *base, int scope,
                     const char *attrs[], int num_attrs, int attrsonly,
                     TALLOC_CTX *mem_ctx, struct tldap_message ***res,
                     const char *fmt, ...)
{
        va_list ap;
        int ret;

        va_start(ap, fmt);
        ret = tldap_search_va(ld, base, scope, attrs, num_attrs, attrsonly,
                              mem_ctx, res, fmt, ap);
        va_end(ap);
        return ret;
}

bool tldap_pull_uint64(struct tldap_message *msg, const char *attr,
                       uint64_t *presult)
{
        char *str;
        uint64_t result;

        str = tldap_talloc_single_attribute(msg, attr, talloc_tos());
        if (str == NULL) {
                DEBUG(10, ("Could not find attribute %s\n", attr));
                return false;
        }
        result = strtoull(str, NULL, 10);
        TALLOC_FREE(str);
        *presult = result;
        return true;
}

bool tldap_pull_uint32(struct tldap_message *msg, const char *attr,
                       uint32_t *presult)
{
        uint64_t result;

        if (!tldap_pull_uint64(msg, attr, &result)) {
                return false;
        }
        *presult = (uint32_t)result;
        return true;
}

struct tldap_fetch_rootdse_state {
        struct tldap_context *ld;
        struct tldap_message *rootdse;
};

static void tldap_fetch_rootdse_done(struct tevent_req *subreq);

struct tevent_req *tldap_fetch_rootdse_send(TALLOC_CTX *mem_ctx,
                                            struct tevent_context *ev,
                                            struct tldap_context *ld)
{
        struct tevent_req *req, *subreq;
        struct tldap_fetch_rootdse_state *state;
        static const char *attrs[2] = { "*", "+" };

        req = tevent_req_create(mem_ctx, &state,
                                struct tldap_fetch_rootdse_state);
        if (req == NULL) {
                return NULL;
        }
        state->ld = ld;
        state->rootdse = NULL;

        subreq = tldap_search_send(
                mem_ctx, ev, ld, "", TLDAP_SCOPE_BASE, "(objectclass=*)",
                attrs, ARRAY_SIZE(attrs), 0, NULL, 0, NULL, 0, 0, 0, 0);
        if (tevent_req_nomem(subreq, req)) {
                return tevent_req_post(req, ev);
        }
        tevent_req_set_callback(subreq, tldap_fetch_rootdse_done, req);
        return req;
}

static void tldap_fetch_rootdse_done(struct tevent_req *subreq)
{
        struct tevent_req *req = tevent_req_callback_data(
                subreq, struct tevent_req);
        struct tldap_fetch_rootdse_state *state = tevent_req_data(
                req, struct tldap_fetch_rootdse_state);
        struct tldap_message *msg;
        int rc;

        rc = tldap_search_recv(subreq, state, &msg);
        if (rc != TLDAP_SUCCESS) {
                TALLOC_FREE(subreq);
                tevent_req_error(req, rc);
                return;
        }

        switch (tldap_msg_type(msg)) {
        case TLDAP_RES_SEARCH_ENTRY:
                if (state->rootdse != NULL) {
                        goto protocol_error;
                }
                state->rootdse = msg;
                break;
        case TLDAP_RES_SEARCH_RESULT:
                TALLOC_FREE(subreq);
                if (state->rootdse == NULL) {
                        goto protocol_error;
                }
                tevent_req_done(req);
                break;
        default:
                goto protocol_error;
        }
        return;

protocol_error:
        tevent_req_error(req, TLDAP_PROTOCOL_ERROR);
        return;
}

int tldap_fetch_rootdse_recv(struct tevent_req *req)
{
        struct tldap_fetch_rootdse_state *state = tevent_req_data(
                req, struct tldap_fetch_rootdse_state);
        int err;
        char *dn;

        if (tevent_req_is_ldap_error(req, &err)) {
                return err;
        }
        /* Trigger parsing the dn, just to make sure it's ok */
        if (!tldap_entry_dn(state->rootdse, &dn)) {
                return TLDAP_DECODING_ERROR;
        }
        if (!tldap_context_setattr(state->ld, "tldap:rootdse",
                                   &state->rootdse)) {
                return TLDAP_NO_MEMORY;
        }
        return 0;
}

int tldap_fetch_rootdse(struct tldap_context *ld)
{
        TALLOC_CTX *frame = talloc_stackframe();
        struct tevent_context *ev;
        struct tevent_req *req;
        int result;

        ev = event_context_init(frame);
        if (ev == NULL) {
                result = TLDAP_NO_MEMORY;
                goto fail;
        }

        req = tldap_fetch_rootdse_send(frame, ev, ld);
        if (req == NULL) {
                result = TLDAP_NO_MEMORY;
                goto fail;
        }

        if (!tevent_req_poll(req, ev)) {
                result = TLDAP_OPERATIONS_ERROR;
                goto fail;
        }

        result = tldap_fetch_rootdse_recv(req);
 fail:
        TALLOC_FREE(frame);
        return result;
}

struct tldap_message *tldap_rootdse(struct tldap_context *ld)
{
        return talloc_get_type(tldap_context_getattr(ld, "tldap:rootdse"),
                               struct tldap_message);
}

bool tldap_entry_has_attrvalue(struct tldap_message *msg,
                               const char *attribute,
                               const DATA_BLOB blob)
{
        int i, num_values;
        DATA_BLOB *values;

        if (!tldap_entry_values(msg, attribute, &values, &num_values)) {
                return false;
        }
        for (i=0; i<num_values; i++) {
                if (data_blob_cmp(&values[i], &blob) == 0) {
                        return true;
                }
        }
        return false;
}

bool tldap_supports_control(struct tldap_context *ld, const char *oid)
{
        struct tldap_message *rootdse = tldap_rootdse(ld);

        if (rootdse == NULL) {
                return false;
        }
        return tldap_entry_has_attrvalue(rootdse, "supportedControl",
                                         data_blob_const(oid, strlen(oid)));
}

struct tldap_control *tldap_add_control(TALLOC_CTX *mem_ctx,
                                        struct tldap_control *ctrls,
                                        int num_ctrls,
                                        struct tldap_control *ctrl)
{
        struct tldap_control *result;

        result = talloc_array(mem_ctx, struct tldap_control, num_ctrls+1);
        if (result == NULL) {
                return NULL;
        }
        memcpy(result, ctrls, sizeof(struct tldap_control) * num_ctrls);
        result[num_ctrls] = *ctrl;
        return result;
}

/*
 * Find a control returned by the server
 */
struct tldap_control *tldap_msg_findcontrol(struct tldap_message *msg,
                                            const char *oid)
{
        struct tldap_control *controls;
        int i, num_controls;

        tldap_msg_sctrls(msg, &num_controls, &controls);

        for (i=0; i<num_controls; i++) {
                if (strcmp(controls[i].oid, oid) == 0) {
                        return &controls[i];
                }
        }
        return NULL;
}

struct tldap_search_paged_state {
        struct tevent_context *ev;
        struct tldap_context *ld;
        const char *base;
        const char *filter;
        int scope;
        const char **attrs;
        int num_attrs;
        int attrsonly;
        struct tldap_control *sctrls;
        int num_sctrls;
        struct tldap_control *cctrls;
        int num_cctrls;
        int timelimit;
        int sizelimit;
        int deref;

        int page_size;
        struct asn1_data *asn1;
        DATA_BLOB cookie;
        struct tldap_message *result;
};

static struct tevent_req *tldap_ship_paged_search(
        TALLOC_CTX *mem_ctx,
        struct tldap_search_paged_state *state)
{
        struct tldap_control *pgctrl;
        struct asn1_data *asn1;

        asn1 = asn1_init(state);
        if (asn1 == NULL) {
                return NULL;
        }
        asn1_push_tag(asn1, ASN1_SEQUENCE(0));
        asn1_write_Integer(asn1, state->page_size);
        asn1_write_OctetString(asn1, state->cookie.data, state->cookie.length);
        asn1_pop_tag(asn1);
        if (asn1->has_error) {
                TALLOC_FREE(asn1);
                return NULL;
        }
        state->asn1 = asn1;

        pgctrl = &state->sctrls[state->num_sctrls-1];
        pgctrl->oid = TLDAP_CONTROL_PAGEDRESULTS;
        pgctrl->critical = true;
        if (!asn1_blob(state->asn1, &pgctrl->value)) {
                TALLOC_FREE(asn1);
                return NULL;
        }
        return tldap_search_send(mem_ctx, state->ev, state->ld, state->base,
                                 state->scope, state->filter, state->attrs,
                                 state->num_attrs, state->attrsonly,
                                 state->sctrls, state->num_sctrls,
                                 state->cctrls, state->num_cctrls,
                                 state->timelimit, state->sizelimit,
                                 state->deref);
}

static void tldap_search_paged_done(struct tevent_req *subreq);

struct tevent_req *tldap_search_paged_send(TALLOC_CTX *mem_ctx,
                                           struct tevent_context *ev,
                                           struct tldap_context *ld,
                                           const char *base, int scope,
                                           const char *filter,
                                           const char **attrs,
                                           int num_attrs,
                                           int attrsonly,
                                           struct tldap_control *sctrls,
                                           int num_sctrls,
                                           struct tldap_control *cctrls,
                                           int num_cctrls,
                                           int timelimit,
                                           int sizelimit,
                                           int deref,
                                           int page_size)
{
        struct tevent_req *req, *subreq;
        struct tldap_search_paged_state *state;
        struct tldap_control empty_control;

        req = tevent_req_create(mem_ctx, &state,
                                struct tldap_search_paged_state);
        if (req == NULL) {
                return NULL;
        }
        state->ev = ev;
        state->ld = ld;
        state->base = base;
        state->filter = filter;
        state->scope = scope;
        state->attrs = attrs;
        state->num_attrs = num_attrs;
        state->attrsonly = attrsonly;
        state->cctrls = cctrls;
        state->num_cctrls = num_cctrls;
        state->timelimit = timelimit;
        state->sizelimit = sizelimit;
        state->deref = deref;

        state->page_size = page_size;
        state->asn1 = NULL;
        state->cookie = data_blob_null;

        ZERO_STRUCT(empty_control);

        state->sctrls = tldap_add_control(state, sctrls, num_sctrls,
                                          &empty_control);
        if (tevent_req_nomem(state->sctrls, req)) {
                return tevent_req_post(req, ev);
        }
        state->num_sctrls = num_sctrls+1;

        subreq = tldap_ship_paged_search(state, state);
        if (tevent_req_nomem(subreq, req)) {
                return tevent_req_post(req, ev);
        }
        tevent_req_set_callback(subreq, tldap_search_paged_done, req);

        return req;
}

static void tldap_search_paged_done(struct tevent_req *subreq)
{
        struct tevent_req *req = tevent_req_callback_data(
                subreq, struct tevent_req);
        struct tldap_search_paged_state *state = tevent_req_data(
                req, struct tldap_search_paged_state);
        struct asn1_data *asn1;
        struct tldap_control *pgctrl;
        int rc, size;

        rc = tldap_search_recv(subreq, state, &state->result);
        if (rc != TLDAP_SUCCESS) {
                TALLOC_FREE(subreq);
                tevent_req_error(req, rc);
                return;
        }

        TALLOC_FREE(state->asn1);

        switch (tldap_msg_type(state->result)) {
        case TLDAP_RES_SEARCH_ENTRY:
        case TLDAP_RES_SEARCH_REFERENCE:
                tevent_req_notify_callback(req);
                return;
        case TLDAP_RES_SEARCH_RESULT:
                break;
        default:
                TALLOC_FREE(subreq);
                tevent_req_error(req, TLDAP_PROTOCOL_ERROR);
                return;
        }

        TALLOC_FREE(subreq);

        /* We've finished one paged search, fire the next */

        pgctrl = tldap_msg_findcontrol(state->result,
                                       TLDAP_CONTROL_PAGEDRESULTS);
        if (pgctrl == NULL) {
                /* RFC2696 requires the server to return the control */
                tevent_req_error(req, TLDAP_PROTOCOL_ERROR);
                return;
        }

        TALLOC_FREE(state->cookie.data);

        asn1 = asn1_init(talloc_tos());
        if (asn1 == NULL) {
                tevent_req_error(req, TLDAP_NO_MEMORY);
                return;
        }

        asn1_load_nocopy(asn1, pgctrl->value.data, pgctrl->value.length);
        asn1_start_tag(asn1, ASN1_SEQUENCE(0));
        asn1_read_Integer(asn1, &size);
        asn1_read_OctetString(asn1, state, &state->cookie);
        asn1_end_tag(asn1);
        if (asn1->has_error) {
                tevent_req_error(req, TLDAP_DECODING_ERROR);
                return;
        }
        TALLOC_FREE(asn1);

        if (state->cookie.length == 0) {
                /* We're done, no cookie anymore */
                tevent_req_done(req);
                return;
        }

        TALLOC_FREE(state->result);

        subreq = tldap_ship_paged_search(state, state);
        if (tevent_req_nomem(subreq, req)) {
                return;
        }
        tevent_req_set_callback(subreq, tldap_search_paged_done, req);
}

int tldap_search_paged_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
                            struct tldap_message **pmsg)
{
        struct tldap_search_paged_state *state = tevent_req_data(
                req, struct tldap_search_paged_state);
        int err;

        if (!tevent_req_is_in_progress(req)
            && tevent_req_is_ldap_error(req, &err)) {
                return err;
        }
        if (tevent_req_is_in_progress(req)) {
                switch (tldap_msg_type(state->result)) {
                case TLDAP_RES_SEARCH_ENTRY:
                case TLDAP_RES_SEARCH_REFERENCE:
                        break;
                default:
                        return TLDAP_PROTOCOL_ERROR;
                }
        }
        *pmsg = talloc_move(mem_ctx, &state->result);
        return TLDAP_SUCCESS;
}