lib: Make sid_parse return the parsed length
[samba.git] / source3 / lib / tldap_util.c
index 46540111c69aaa2032f4fc86743bb2be9714d417..efc37e48e7c52f44840a6b88d78388aeff2f8995 100644 (file)
 */
 
 #include "includes.h"
+#include "tldap.h"
+#include "tldap_util.h"
+#include "../libcli/security/security.h"
+#include "../lib/util/asn1.h"
 
 bool tldap_entry_values(struct tldap_message *msg, const char *attribute,
-                       int *num_values, DATA_BLOB **values)
+                       DATA_BLOB **values, int *num_values)
 {
        struct tldap_attribute *attributes;
        int i, num_attributes;
 
-       if (!tldap_entry_attributes(msg, &num_attributes, &attributes)) {
+       if (!tldap_entry_attributes(msg, &attributes, &num_attributes)) {
                return false;
        }
 
@@ -51,7 +55,7 @@ bool tldap_get_single_valueblob(struct tldap_message *msg,
        if (attribute == NULL) {
                return NULL;
        }
-       if (!tldap_entry_values(msg, attribute, &num_values, &values)) {
+       if (!tldap_entry_values(msg, attribute, &values, &num_values)) {
                return NULL;
        }
        if (num_values != 1) {
@@ -70,11 +74,11 @@ char *tldap_talloc_single_attribute(struct tldap_message *msg,
        size_t len;
 
        if (!tldap_get_single_valueblob(msg, attribute, &val)) {
-               return false;
+               return NULL;
        }
        if (!convert_string_talloc(mem_ctx, CH_UTF8, CH_UNIX,
                                   val.data, val.length,
-                                  &result, &len, false)) {
+                                  &result, &len)) {
                return NULL;
        }
        return result;
@@ -84,15 +88,28 @@ bool tldap_pull_binsid(struct tldap_message *msg, const char *attribute,
                       struct dom_sid *sid)
 {
        DATA_BLOB val;
+       struct sid_parse_ret ret;
+
+       if (!tldap_get_single_valueblob(msg, attribute, &val)) {
+               return false;
+       }
+       ret = sid_parse(val.data, val.length, sid);
+       return (ret.len != -1);
+}
+
+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 sid_parse((char *)val.data, val.length, sid);
+       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,
-                               int num_newvals, DATA_BLOB *newvals)
+                               DATA_BLOB *newvals, int num_newvals)
 {
        int num_values = talloc_array_length(mod->values);
        int i;
@@ -117,9 +134,10 @@ static bool tldap_add_blob_vals(TALLOC_CTX *mem_ctx, struct tldap_mod *mod,
        return true;
 }
 
-bool tldap_add_mod_blobs(TALLOC_CTX *mem_ctx, struct tldap_mod **pmods,
+bool tldap_add_mod_blobs(TALLOC_CTX *mem_ctx,
+                        struct tldap_mod **pmods, int *pnum_mods,
                         int mod_op, const char *attrib,
-                        int num_newvals, DATA_BLOB *newvals)
+                        DATA_BLOB *newvals, int num_newvals)
 {
        struct tldap_mod new_mod;
        struct tldap_mod *mods = *pmods;
@@ -133,7 +151,7 @@ bool tldap_add_mod_blobs(TALLOC_CTX *mem_ctx, struct tldap_mod **pmods,
                return false;
        }
 
-       num_mods = talloc_array_length(mods);
+       num_mods = *pnum_mods;
 
        for (i=0; i<num_mods; i++) {
                if ((mods[i].mod_op == mod_op)
@@ -155,11 +173,11 @@ bool tldap_add_mod_blobs(TALLOC_CTX *mem_ctx, struct tldap_mod **pmods,
        }
 
        if ((num_newvals != 0)
-           && !tldap_add_blob_vals(mods, mod, num_newvals, newvals)) {
+           && !tldap_add_blob_vals(mods, mod, newvals, num_newvals)) {
                return false;
        }
 
-       if (i == num_mods) {
+       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) {
@@ -169,29 +187,31 @@ bool tldap_add_mod_blobs(TALLOC_CTX *mem_ctx, struct tldap_mod **pmods,
        }
 
        *pmods = mods;
+       *pnum_mods += 1;
        return true;
 }
 
-bool tldap_add_mod_str(TALLOC_CTX *mem_ctx, struct tldap_mod **pmods,
+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)) {
+                                  strlen(str), &utf8.data, &utf8.length)) {
                return false;
        }
 
-       ret = tldap_add_mod_blobs(mem_ctx, pmods, mod_op, attrib, 1, &utf8);
+       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,
-                                   int *pnum_mods, struct tldap_mod **pmods,
+                                   struct tldap_mod **pmods, int *pnum_mods,
                                    const char *attrib, DATA_BLOB newval,
                                    int (*comparison)(const DATA_BLOB *d1,
                                                      const DATA_BLOB *d2))
@@ -201,7 +221,7 @@ static bool tldap_make_mod_blob_int(struct tldap_message *existing,
        DATA_BLOB oldval = data_blob_null;
 
        if ((existing != NULL)
-           && tldap_entry_values(existing, attrib, &num_values, &values)) {
+           && tldap_entry_values(existing, attrib, &values, &num_values)) {
 
                if (num_values > 1) {
                        /* can't change multivalue attributes atm */
@@ -217,7 +237,7 @@ static bool tldap_make_mod_blob_int(struct tldap_message *existing,
                /* 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,("smbldap_make_mod_blob: attribute |%s| not "
+               DEBUG(10,("tldap_make_mod_blob_int: attribute |%s| not "
                          "changed.\n", attrib));
                return true;
        }
@@ -231,10 +251,11 @@ static bool tldap_make_mod_blob_int(struct tldap_message *existing,
                 * Novell NDS. In NDS you have to first remove attribute and
                 * then you could add new value */
 
-               DEBUG(10, ("smbldap_make_mod_blob: deleting attribute |%s|\n",
+               DEBUG(10, ("tldap_make_mod_blob_int: deleting attribute |%s|\n",
                           attrib));
-               if (!tldap_add_mod_blobs(mem_ctx, pmods, TLDAP_MOD_DELETE,
-                                        attrib, 1, &oldval)) {
+               if (!tldap_add_mod_blobs(mem_ctx, pmods, pnum_mods,
+                                        TLDAP_MOD_DELETE,
+                                        attrib, &oldval, 1)) {
                        return false;
                }
        }
@@ -244,22 +265,22 @@ static bool tldap_make_mod_blob_int(struct tldap_message *existing,
           the old value, should it exist. */
 
        if (newval.data != NULL) {
-               DEBUG(10, ("smbldap_make_mod: adding attribute |%s| value len "
+               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, TLDAP_MOD_ADD,
-                                        attrib, 1, &newval)) {
+               if (!tldap_add_mod_blobs(mem_ctx, pmods, pnum_mods,
+                                        TLDAP_MOD_ADD,
+                                        attrib, &newval, 1)) {
                        return false;
                }
        }
-       *pnum_mods = talloc_array_length(*pmods);
        return true;
 }
 
 bool tldap_make_mod_blob(struct tldap_message *existing, TALLOC_CTX *mem_ctx,
-                        int *pnum_mods, struct tldap_mod **pmods,
+                        struct tldap_mod **pmods, int *pnum_mods,
                         const char *attrib, DATA_BLOB newval)
 {
-       return tldap_make_mod_blob_int(existing, mem_ctx, pnum_mods, pmods,
+       return tldap_make_mod_blob_int(existing, mem_ctx, pmods, pnum_mods,
                                       attrib, newval, data_blob_cmp);
 }
 
@@ -270,24 +291,24 @@ static int compare_utf8_blobs(const DATA_BLOB *d1, const DATA_BLOB *d2)
        int ret;
 
        if (!convert_string_talloc(talloc_tos(), CH_UTF8, CH_UNIX, d1->data,
-                                  d1->length, &s1, &s1len, false)) {
+                                  d1->length, &s1, &s1len)) {
                /* can't do much here */
                return 0;
        }
        if (!convert_string_talloc(talloc_tos(), CH_UTF8, CH_UNIX, d2->data,
-                                  d2->length, &s2, &s2len, false)) {
+                                  d2->length, &s2, &s2len)) {
                /* can't do much here */
                TALLOC_FREE(s1);
                return 0;
        }
-       ret = StrCaseCmp(s1, s2);
+       ret = strcasecmp_m(s1, s2);
        TALLOC_FREE(s2);
        TALLOC_FREE(s1);
        return ret;
 }
 
 bool tldap_make_mod_fmt(struct tldap_message *existing, TALLOC_CTX *mem_ctx,
-                       int *pnum_mods, struct tldap_mod **pmods,
+                       struct tldap_mod **pmods, int *pnum_mods,
                        const char *attrib, const char *fmt, ...)
 {
        va_list ap;
@@ -305,49 +326,64 @@ bool tldap_make_mod_fmt(struct tldap_message *existing, TALLOC_CTX *mem_ctx,
 
        blob.length = strlen(newval);
        if (blob.length != 0) {
-               blob.data = CONST_DISCARD(uint8_t *, newval);
+               blob.data = discard_const_p(uint8_t, newval);
        }
-       ret = tldap_make_mod_blob_int(existing, mem_ctx, pnum_mods, pmods,
+       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 *tldap_errstr(TALLOC_CTX *mem_ctx, struct tldap_context *ld,
+                        TLDAPRC rc)
 {
        const char *ld_error = NULL;
        char *res;
 
-       ld_error = tldap_msg_diagnosticmessage(tldap_ctx_lastmsg(ld));
-       res = talloc_asprintf(mem_ctx, "LDAP error %d (%s), %s", rc,
-                             tldap_err2string(rc),
+       if (ld != NULL) {
+               ld_error = tldap_msg_diagnosticmessage(tldap_ctx_lastmsg(ld));
+       }
+       res = talloc_asprintf(mem_ctx, "LDAP error %d (%s), %s",
+                             (int)TLDAP_RC_V(rc), tldap_rc2string(rc),
                              ld_error ? ld_error : "unknown");
        return res;
 }
 
-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, ...)
+TLDAPRC 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)
 {
-       va_list ap;
        char *filter;
-       int ret;
+       TLDAPRC rc;
 
-       va_start(ap, fmt);
        filter = talloc_vasprintf(talloc_tos(), fmt, ap);
-       va_end(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);
+
+       rc = 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);
        TALLOC_FREE(filter);
-       return ret;
+       return rc;
+}
+
+TLDAPRC 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;
+       TLDAPRC rc;
+
+       va_start(ap, fmt);
+       rc = tldap_search_va(ld, base, scope, attrs, num_attrs, attrsonly,
+                            mem_ctx, res, fmt, ap);
+       va_end(ap);
+       return rc;
 }
 
 bool tldap_pull_uint64(struct tldap_message *msg, const char *attr,
@@ -355,13 +391,22 @@ bool tldap_pull_uint64(struct tldap_message *msg, const char *attr,
 {
        char *str;
        uint64_t result;
+       int error = 0;
 
        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);
+
+       result = strtoull_err(str, NULL, 10, &error);
+       if (error != 0) {
+               DBG_DEBUG("Attribute conversion failed (%s)\n",
+                         strerror(error));
+               TALLOC_FREE(str);
+               return false;
+       }
+
        TALLOC_FREE(str);
        *presult = result;
        return true;
@@ -419,12 +464,10 @@ static void tldap_fetch_rootdse_done(struct tevent_req *subreq)
        struct tldap_fetch_rootdse_state *state = tevent_req_data(
                req, struct tldap_fetch_rootdse_state);
        struct tldap_message *msg;
-       int rc;
+       TLDAPRC rc;
 
        rc = tldap_search_recv(subreq, state, &msg);
-       if (rc != TLDAP_SUCCESS) {
-               TALLOC_FREE(subreq);
-               tevent_req_error(req, rc);
+       if (tevent_req_ldap_error(req, rc)) {
                return;
        }
 
@@ -445,23 +488,22 @@ static void tldap_fetch_rootdse_done(struct tevent_req *subreq)
        default:
                goto protocol_error;
        }
-       tevent_req_done(req);
        return;
 
 protocol_error:
-       tevent_req_error(req, TLDAP_PROTOCOL_ERROR);
+       tevent_req_ldap_error(req, TLDAP_PROTOCOL_ERROR);
        return;
 }
 
-int tldap_fetch_rootdse_recv(struct tevent_req *req)
+TLDAPRC 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;
+       TLDAPRC rc;
        char *dn;
 
-       if (tevent_req_is_ldap_error(req, &err)) {
-               return err;
+       if (tevent_req_is_ldap_error(req, &rc)) {
+               return rc;
        }
        /* Trigger parsing the dn, just to make sure it's ok */
        if (!tldap_entry_dn(state->rootdse, &dn)) {
@@ -471,37 +513,33 @@ int tldap_fetch_rootdse_recv(struct tevent_req *req)
                                   &state->rootdse)) {
                return TLDAP_NO_MEMORY;
        }
-       return 0;
+       return TLDAP_SUCCESS;
 }
 
-int tldap_fetch_rootdse(struct tldap_context *ld)
+TLDAPRC tldap_fetch_rootdse(struct tldap_context *ld)
 {
        TALLOC_CTX *frame = talloc_stackframe();
        struct tevent_context *ev;
        struct tevent_req *req;
-       int result;
+       TLDAPRC rc = TLDAP_NO_MEMORY;
 
-       ev = event_context_init(frame);
+       ev = samba_tevent_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;
+               rc = TLDAP_OPERATIONS_ERROR;
                goto fail;
        }
 
-       result = tldap_fetch_rootdse_recv(req);
+       rc = tldap_fetch_rootdse_recv(req);
  fail:
        TALLOC_FREE(frame);
-       return result;
+       return rc;
 }
 
 struct tldap_message *tldap_rootdse(struct tldap_context *ld)
@@ -517,7 +555,7 @@ bool tldap_entry_has_attrvalue(struct tldap_message *msg,
        int i, num_values;
        DATA_BLOB *values;
 
-       if (!tldap_entry_values(msg, attribute, &num_values, &values)) {
+       if (!tldap_entry_values(msg, attribute, &values, &num_values)) {
                return false;
        }
        for (i=0; i<num_values; i++) {
@@ -538,3 +576,264 @@ bool tldap_supports_control(struct tldap_context *ld, const char *oid)
        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 = NULL;
+
+       asn1 = asn1_init(state);
+       if (asn1 == NULL) {
+               return NULL;
+       }
+       if (!asn1_push_tag(asn1, ASN1_SEQUENCE(0))) goto err;
+       if (!asn1_write_Integer(asn1, state->page_size)) goto err;
+       if (!asn1_write_OctetString(asn1, state->cookie.data, state->cookie.length)) goto err;
+       if (!asn1_pop_tag(asn1)) goto err;
+       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)) {
+               goto err;
+       }
+       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);
+
+  err:
+
+       TALLOC_FREE(asn1);
+       return NULL;
+}
+
+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 = NULL;
+       struct tldap_control *pgctrl;
+       TLDAPRC rc;
+       int size;
+
+       rc = tldap_search_recv(subreq, state, &state->result);
+       if (tevent_req_ldap_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_ldap_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_ldap_error(req, TLDAP_PROTOCOL_ERROR);
+               return;
+       }
+
+       TALLOC_FREE(state->cookie.data);
+
+       asn1 = asn1_init(talloc_tos());
+       if (tevent_req_nomem(asn1, req)) {
+               return;
+       }
+
+       asn1_load_nocopy(asn1, pgctrl->value.data, pgctrl->value.length);
+       if (!asn1_start_tag(asn1, ASN1_SEQUENCE(0))) goto err;
+       if (!asn1_read_Integer(asn1, &size)) goto err;
+       if (!asn1_read_OctetString(asn1, state, &state->cookie)) goto err;
+       if (!asn1_end_tag(asn1)) goto err;
+
+       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);
+
+  err:
+
+       TALLOC_FREE(asn1);
+       tevent_req_ldap_error(req, TLDAP_DECODING_ERROR);
+}
+
+TLDAPRC 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);
+       TLDAPRC rc;
+
+       if (!tevent_req_is_in_progress(req)
+           && tevent_req_is_ldap_error(req, &rc)) {
+               return rc;
+       }
+       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;
+}