From 8da7cce20d994c15be699676b66804648620fb00 Mon Sep 17 00:00:00 2001
From: Howard Chu <hyc@openldap.org>
Date: Thu, 10 Mar 2005 03:13:24 +0000
Subject: [PATCH] Added translucent overlay (sponsored by HP)
---
doc/man/man5/slapo-translucent.5 | 77 +++
servers/slapd/overlays/Makefile.in | 5 +
servers/slapd/overlays/overlays.c | 6 +
servers/slapd/overlays/translucent.c | 734 +++++++++++++++++++++++++++
4 files changed, 822 insertions(+)
create mode 100644 doc/man/man5/slapo-translucent.5
create mode 100644 servers/slapd/overlays/translucent.c
diff --git a/doc/man/man5/slapo-translucent.5 b/doc/man/man5/slapo-translucent.5
new file mode 100644
index 0000000000..c44218e522
--- /dev/null
+++ b/doc/man/man5/slapo-translucent.5
@@ -0,0 +1,77 @@
+.TH SLAPO-TRANSLUCENT 5 "RELEASEDATE" "OpenLDAP LDVERSION"
+.\" Copyright 2004 The OpenLDAP Foundation All Rights Reserved.
+.\" Copying restrictions apply. See COPYRIGHT/LICENSE.
+.\" $OpenLDAP$
+.SH NAME
+slapo-translucent \- Proxy Override overlay
+.SH SYNOPSIS
+ETCDIR/slapd.conf
+.SH DESCRIPTION
+The Proxy Override overlay can be used with a backend database such as
+.BR slapd-bdb (5)
+to create a "translucent proxy". Entries retrieved from a remote LDAP
+server may have some or all attributes overridden, or new attributes
+added, by entries in the local database before being presented to the
+client.
+.LP
+A
+.BR search
+operation is first populated with entries from the remote LDAP server, the
+attributes of which are then overridden with any attributes defined in the
+local database. Local overrides may be populated with the
+.BR add ,
+.B modify ,
+and
+.B modrdn
+operations, the use of which is restricted to the root user.
+.LP
+A
+.BR compare
+operation will perform a comparison with attributes defined in the local
+database record (if any) before any comparison is made with data in the
+remote database.
+.SH CONFIGURATION
+The Proxy Override overlay uses a remote LDAP server which is configured
+with the options shown in
+.BR slapd-ldap (5).
+These
+.B slapd.conf
+options are specific to the Proxy Override overlay; they may appear anywhere
+after the
+.B overlay
+directive and before any subsequent
+.B database
+directive.
+.TP
+.B translucent_strict
+By default, attempts to delete attributes in either the local or remote
+databases will be silently ignored. The
+.B translucent_strict
+directive causes these modifications to fail with a Constraint Violation.
+.TP
+.B translucent_no_glue
+This configuration option disables the automatic creation of "glue" records
+for an
+.B add
+or
+.B modrdn
+operation, such that all parents of an entry added to the local database
+must be created by hand. Glue records are always created for a
+.B modify
+operation.
+.SH CAVEATS
+.LP
+The Proxy Override overlay will disable schema checking in the local database,
+so that an entry consisting of overlay attributes need not adhere to the
+complete schema.
+.LP
+Because the translucent overlay does not perform any DN rewrites, the local
+and remote database instances must have the same suffix. Other configurations
+will probably fail with No Such Object and other errors.
+.SH FILES
+.TP
+ETCDIR/slapd.conf
+default slapd configuration file
+.SH SEE ALSO
+.BR slapd.conf (5),
+.BR slapd-ldap (5).
diff --git a/servers/slapd/overlays/Makefile.in b/servers/slapd/overlays/Makefile.in
index 9f95972edc..7abf065c22 100644
--- a/servers/slapd/overlays/Makefile.in
+++ b/servers/slapd/overlays/Makefile.in
@@ -23,6 +23,7 @@ SRCS = overlays.c \
refint.c \
rwm.c rwmconf.c rwmdn.c rwmmap.c \
syncprov.c \
+ translucent.c \
unique.c
OBJS = overlays.lo \
denyop.lo \
@@ -34,6 +35,7 @@ OBJS = overlays.lo \
refint.lo \
rwm.lo rwmconf.lo rwmdn.lo rwmmap.lo \
syncprov.lo \
+ translucent.lo \
unique.lo
LDAP_INCDIR= ../../../include
@@ -78,6 +80,9 @@ rwm.la : rwm.lo $(@PLAT@_LINK_LIBS)
syncprov.la : syncprov.lo $(@PLAT@_LINK_LIBS)
$(LTLINK_MOD) -module -o $@ syncprov.lo version.lo $(LINK_LIBS)
+translucent.la : translucent.lo $(@PLAT@_LINK_LIBS)
+ $(LTLINK_MOD) -module -o $@ translucent.lo version.lo $(LINK_LIBS)
+
unique.la : unique.lo $(@PLAT@_LINK_LIBS)
$(LTLINK_MOD) -module -o $@ unique.lo version.lo $(LINK_LIBS)
diff --git a/servers/slapd/overlays/overlays.c b/servers/slapd/overlays/overlays.c
index 3e73167b20..8b1a19ec98 100644
--- a/servers/slapd/overlays/overlays.c
+++ b/servers/slapd/overlays/overlays.c
@@ -50,6 +50,9 @@ extern int rwm_init();
#if SLAPD_OVER_SYNCPROV == SLAPD_MOD_STATIC
extern int syncprov_init();
#endif
+#if SLAPD_OVER_TRANSLUCENT == SLAPD_MOD_STATIC
+extern int translucent_init();
+#endif
#if SLAPD_OVER_UNIQUE == SLAPD_MOD_STATIC
extern int unique_init();
#endif
@@ -85,6 +88,9 @@ static struct {
#if SLAPD_OVER_SYNCPROV == SLAPD_MOD_STATIC
{ "Syncrepl Provider", syncprov_init },
#endif
+#if SLAPD_OVER_TRANSLUCENT == SLAPD_MOD_STATIC
+ { "Translucent Proxy", translucent_init },
+#endif
#if SLAPD_OVER_UNIQUE == SLAPD_MOD_STATIC
{ "Attribute Uniqueness", unique_init },
#endif
diff --git a/servers/slapd/overlays/translucent.c b/servers/slapd/overlays/translucent.c
new file mode 100644
index 0000000000..38ff0039f6
--- /dev/null
+++ b/servers/slapd/overlays/translucent.c
@@ -0,0 +1,734 @@
+/* Copyright 2004, Symas Corporation.
+ * All Rights Reserved.
+ */
+
+#include "portable.h"
+
+#ifdef SLAPD_OVER_TRANSLUCENT
+
+#include <stdio.h>
+
+#include <ac/string.h>
+#include <ac/socket.h>
+
+#include "slap.h"
+
+/* config block */
+
+typedef struct translucent_configuration {
+ int debug;
+ int strict;
+ int no_add;
+ int glue;
+} translucent_configuration;
+
+/* stack of captive backends */
+
+typedef struct overlay_stack {
+ BackendInfo *info; /* captive backend */
+ void *private; /* local backend_private */
+ translucent_configuration *config; /* our_private: configuration */
+} overlay_stack;
+
+/* for translucent_init() */
+
+static slap_overinst translucent;
+
+/*
+** glue_parent()
+** call syncrepl_add_glue() with the parent suffix;
+**
+*/
+
+static struct berval glue[] = { BER_BVC("top"), BER_BVC("glue"), BER_BVNULL };
+
+void glue_parent(Operation *op) {
+ Operation nop = *op;
+ slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
+ struct berval dn = { 0, NULL };
+ char *odn = op->o_req_ndn.bv_val;
+ Attribute *a;
+ Entry *e;
+ int idn, ldn;
+
+ /* tis more work to use strchr() for a berval... */
+ for(idn = 0; odn[idn] && odn[idn] != ','; idn++);
+ if(!idn || !odn[idn]) return; /* because you never know */
+ idn++;
+ ldn = dn.bv_len = op->o_req_ndn.bv_len - idn;
+ dn.bv_val = ch_malloc(ldn + 1);
+ strcpy(dn.bv_val, odn + idn);
+
+ Debug(LDAP_DEBUG_TRACE, "=> glue_parent: fabricating glue for <%s>\n", dn.bv_val, 0, 0);
+
+ e = ch_calloc(1, sizeof(Entry));
+ e->e_id = NOID;
+ ber_dupbv(&e->e_name, &dn);
+ ber_dupbv(&e->e_nname, &dn);
+
+ a = ch_calloc(1, sizeof(Attribute));
+ a->a_desc = slap_schema.si_ad_objectClass;
+ a->a_vals = ch_malloc(sizeof(struct berval) * 3);
+ ber_dupbv(&a->a_vals[0], &glue[0]);
+ ber_dupbv(&a->a_vals[1], &glue[1]);
+ ber_dupbv(&a->a_vals[2], &glue[2]);
+ a->a_nvals = a->a_vals;
+ a->a_next = e->e_attrs;
+ e->e_attrs = a;
+
+ a = ch_calloc(1, sizeof(Attribute));
+ a->a_desc = slap_schema.si_ad_structuralObjectClass;
+ a->a_vals = ch_malloc(sizeof(struct berval) * 2);
+ ber_dupbv(&a->a_vals[0], &glue[1]);
+ ber_dupbv(&a->a_vals[1], &glue[2]);
+ a->a_nvals = a->a_vals;
+ a->a_next = e->e_attrs;
+ e->e_attrs = a;
+
+ nop.o_req_dn = dn;
+ nop.o_req_ndn = dn;
+ nop.ora_e = e;
+ nop.o_bd->bd_info = (BackendInfo *) on->on_info->oi_orig;
+
+ syncrepl_add_glue(&nop, e);
+ return;
+}
+
+/*
+** dup_bervarray()
+** copy a BerVarray;
+*/
+
+BerVarray dup_bervarray(BerVarray b) {
+ int i, len;
+ BerVarray nb;
+ for(len = 0; b[len].bv_val; len++);
+ nb = ch_malloc((len+1) * sizeof(BerValue));
+ for(i = 0; i < len; i++) ber_dupbv(&nb[i], &b[i]);
+ nb[len].bv_val = NULL;
+ nb[len].bv_len = 0;
+ return(nb);
+}
+
+/*
+** free_attr_chain()
+** free only the Attribute*, not the contents;
+**
+*/
+void free_attr_chain(Attribute *a) {
+ Attribute *ax;
+ for(ax = NULL; a; a = a->a_next) {
+ if(ax) ch_free(ax);
+ ax = a;
+ }
+ return;
+}
+
+/*
+** translucent_add()
+** if not bound as root, send ACCESS error;
+** if config.glue, glue_parent();
+** return CONTINUE;
+**
+*/
+
+static int translucent_add(Operation *op, SlapReply *rs) {
+ slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
+ overlay_stack *ov = on->on_bi.bi_private;
+ Debug(LDAP_DEBUG_TRACE, "==> translucent_add: %s\n",
+ op->o_req_dn.bv_val, 0, 0);
+ if(!be_isroot(op)) {
+ op->o_bd->bd_info = (BackendInfo *) on->on_info;
+ send_ldap_error(op, rs, LDAP_INSUFFICIENT_ACCESS,
+ "user modification of overlay database not permitted");
+ return(rs->sr_err);
+ }
+ if(!ov->config->glue) glue_parent(op);
+ return(SLAP_CB_CONTINUE);
+}
+
+/*
+** translucent_modrdn()
+** if not bound as root, send ACCESS error;
+** if !config.glue, glue_parent();
+** else return CONTINUE;
+**
+*/
+
+static int translucent_modrdn(Operation *op, SlapReply *rs) {
+ slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
+ overlay_stack *ov = on->on_bi.bi_private;
+ Debug(LDAP_DEBUG_TRACE, "==> translucent_modrdn: %s -> %s\n",
+ op->o_req_dn.bv_val, op->orr_newrdn.bv_val, 0);
+ if(!be_isroot(op)) {
+ op->o_bd->bd_info = (BackendInfo *) on->on_info;
+ send_ldap_error(op, rs, LDAP_INSUFFICIENT_ACCESS,
+ "user modification of overlay database not permitted");
+ return(rs->sr_err);
+ }
+ if(!ov->config->glue) glue_parent(op);
+ return(SLAP_CB_CONTINUE);
+}
+
+/*
+** translucent_delete()
+** if not bound as root, send ACCESS error;
+** else return CONTINUE;
+**
+*/
+
+static int translucent_delete(Operation *op, SlapReply *rs) {
+ slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
+ Debug(LDAP_DEBUG_TRACE, "==> translucent_delete: %s\n",
+ op->o_req_dn.bv_val, 0, 0);
+ if(!be_isroot(op)) {
+ op->o_bd->bd_info = (BackendInfo *) on->on_info;
+ send_ldap_error(op, rs, LDAP_INSUFFICIENT_ACCESS,
+ "user modification of overlay database not permitted");
+ return(rs->sr_err);
+ }
+ return(SLAP_CB_CONTINUE);
+}
+
+/*
+** translucent_modify()
+** modify in local backend if exists in both;
+** otherwise, add to local backend;
+** fail if not defined in captive backend;
+**
+*/
+
+static int translucent_modify(Operation *op, SlapReply *rs) {
+ SlapReply nrs = { REP_RESULT };
+ Operation nop = *op;
+
+ slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
+ overlay_stack *ov = on->on_bi.bi_private;
+ translucent_configuration *cf = ov->config;
+ void *private = op->o_bd->be_private;
+ Entry ne, *e, *re = NULL;
+ Attribute *a, *ax;
+ Modifications *m, *mm;
+ int del, rc, erc = 0;
+
+ Debug(LDAP_DEBUG_TRACE, "==> translucent_modify: %s\n",
+ op->o_req_dn.bv_val, 0, 0);
+
+/*
+** fetch entry from the captive backend;
+** if it did not exist, fail;
+** release it, if captive backend supports this;
+**
+*/
+
+ op->o_bd->bd_info = (BackendInfo *) on->on_info;
+ op->o_bd->be_private = ov->private;
+ rc = ov->info->bi_entry_get_rw(op, &op->o_req_ndn, NULL, NULL, 0, &re);
+ op->o_bd->be_private = private;
+
+ /* if(ov->config->no_add && (!re || rc != LDAP_SUCCESS)) */
+ if(!re || rc != LDAP_SUCCESS) {
+ send_ldap_error(op, rs, LDAP_NO_SUCH_OBJECT,
+ "attempt to modify nonexistent local record");
+ return(rs->sr_err);
+ }
+
+/*
+** fetch entry from local backend;
+** if it exists:
+** foreach Modification:
+** if attr not present in local:
+** if Mod == LDAP_MOD_DELETE:
+** if remote attr not present, return NO_SUCH;
+** if remote attr present, drop this Mod;
+** else force this Mod to LDAP_MOD_ADD;
+** return CONTINUE;
+**
+*/
+
+ rc = be_entry_get_rw(op, &op->o_req_ndn, NULL, NULL, 0, &e);
+
+ if(e && rc == LDAP_SUCCESS) {
+ Debug(LDAP_DEBUG_TRACE, "=> translucent_modify: found local entry\n", 0, 0, 0);
+ for(m = op->orm_modlist; m; m = m->sml_next) {
+ for(a = e->e_attrs; a; a = a->a_next)
+ if(a->a_desc == m->sml_desc) break;
+ if(a) continue; /* found local attr */
+ if(m->sml_op == LDAP_MOD_DELETE) {
+ for(a = re->e_attrs; a; a = a->a_next)
+ if(a->a_desc == m->sml_desc) break;
+ /* not found remote attr */
+ if(!a) {
+ erc = LDAP_NO_SUCH_ATTRIBUTE;
+ goto release;
+ }
+ if(ov->config->strict) {
+ erc = LDAP_CONSTRAINT_VIOLATION;
+ goto release;
+ }
+ Debug(LDAP_DEBUG_TRACE,
+ "=> translucent_modify: silently dropping delete: %s\n",
+ m->sml_desc->ad_cname.bv_val, 0, 0);
+ for(mm = op->orm_modlist; mm->sml_next != m; mm = mm->sml_next);
+ mm->sml_next = m->sml_next;
+ mm = m;
+ m = m->sml_next;
+ mm->sml_next = NULL; /* hack */
+ slap_mods_free(mm);
+ if(m) continue;
+ }
+ m->sml_op = LDAP_MOD_ADD;
+ }
+ erc = SLAP_CB_CONTINUE;
+release:
+ if(re) {
+ op->o_bd->be_private = ov->private;
+ if(ov->info->bi_entry_release_rw)
+ ov->info->bi_entry_release_rw(op, re, 0);
+ else
+ entry_free(re);
+ op->o_bd->be_private = private;
+ }
+ be_entry_release_r(op, e);
+ if(erc == SLAP_CB_CONTINUE) {
+ op->o_bd->bd_info = (BackendInfo *) on;
+ return(erc);
+ } else if(erc) {
+ send_ldap_error(op, rs, erc,
+ "attempt to delete nonexistent attribute");
+ return(erc);
+ }
+ }
+
+/*
+** foreach Modification:
+** if MOD_ADD or MOD_REPLACE, add Attribute;
+** if no Modifications were suitable:
+** if config.strict, throw CONSTRAINT_VIOLATION;
+** else, return early SUCCESS;
+** fabricate Entry with new Attribute chain;
+** glue_parent() for this Entry;
+** call bi_op_add() in local backend;
+**
+*/
+
+ Debug(LDAP_DEBUG_TRACE, "=> translucent_modify: fabricating local add\n", 0, 0, 0);
+ a = NULL;
+ for(del = 0, ax = NULL, m = op->orm_modlist; m; m = m->sml_next) {
+ if(((m->sml_op & LDAP_MOD_OP) != LDAP_MOD_ADD) &&
+ ((m->sml_op & LDAP_MOD_OP) != LDAP_MOD_REPLACE)) {
+ Debug(LDAP_DEBUG_ANY,
+ "=> translucent_modify: silently dropped modification(%d): %s\n",
+ m->sml_op, m->sml_desc->ad_cname.bv_val, 0);
+ if((m->sml_op & LDAP_MOD_OP) == LDAP_MOD_DELETE) del++;
+ continue;
+ }
+ a = ch_calloc(1, sizeof(Attribute));
+ a->a_desc = m->sml_desc;
+ a->a_vals = m->sml_values;
+ a->a_nvals = m->sml_nvalues;
+ a->a_next = ax;
+ ax = a;
+ }
+
+ if(del && ov->config->strict) {
+ free_attr_chain(a);
+ send_ldap_error(op, rs, LDAP_CONSTRAINT_VIOLATION,
+ "attempt to delete attributes from local database");
+ return(rs->sr_err);
+ }
+
+ if(!ax) {
+ if(ov->config->strict) {
+ send_ldap_error(op, rs, LDAP_CONSTRAINT_VIOLATION,
+ "modification contained other than ADD or REPLACE");
+ return(rs->sr_err);
+ }
+ op->o_bd->bd_info = (BackendInfo *) on;
+ /* rs->sr_text = "no valid modification found"; */
+ rs->sr_err = LDAP_SUCCESS;
+ send_ldap_result(op, rs);
+ return(rs->sr_err);
+ }
+
+ ne.e_id = NOID;
+ ne.e_name = op->o_req_dn;
+ ne.e_nname = op->o_req_ndn;
+ ne.e_attrs = a;
+ ne.e_ocflags = 0;
+ ne.e_bv.bv_len = 0;
+ ne.e_bv.bv_val = NULL;
+ ne.e_private = NULL;
+
+ nop.o_tag = LDAP_REQ_ADD;
+ nop.oq_add.rs_e = ≠
+
+ op->o_bd->bd_info = (BackendInfo *) on;
+ glue_parent(&nop);
+
+ rc = on->on_info->oi_orig->bi_op_add(&nop, &nrs);
+ free_attr_chain(a);
+
+ return(rc);
+}
+
+static int translucent_compare(Operation *op, SlapReply *rs) {
+ slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
+ overlay_stack *ov = on->on_bi.bi_private;
+ void *private = op->o_bd->be_private;
+ translucent_configuration *cf = ov->config;
+
+ AttributeAssertion *ava = op->orc_ava;
+ Attribute *a, *an, *ra, *as = NULL;
+ Entry *e, *ee, *re;
+ int rc;
+
+ Debug(LDAP_DEBUG_TRACE, "==> translucent_compare: <%s> %s:%s\n",
+ op->o_req_dn.bv_val, ava->aa_desc->ad_cname.bv_val, ava->aa_value.bv_val);
+
+/*
+** if the local backend has an entry for this attribute:
+** CONTINUE and let it do the compare;
+**
+*/
+
+ op->o_bd->bd_info = (BackendInfo *) on->on_info;
+ rc = be_entry_get_rw(op, &op->o_req_ndn, NULL, ava->aa_desc, 0, &e);
+ if(e && rc == LDAP_SUCCESS) {
+ be_entry_release_r(op, e);
+ op->o_bd->bd_info = (BackendInfo *) on;
+ return(SLAP_CB_CONTINUE);
+ }
+
+/*
+** call compare() in the captive backend;
+** return the result;
+**
+*/
+
+ op->o_bd->be_private = ov->private;
+ rc = ov->info->bi_op_compare(op, rs);
+ op->o_bd->be_private = private;
+ op->o_bd->bd_info = (BackendInfo *) on;
+ return(rc);
+}
+
+/*
+** translucent_search_cb()
+** merge local data with the search result
+**
+*/
+
+static int translucent_search_cb(Operation *op, SlapReply *rs) {
+ slap_overinst *on;
+ Entry *e, *re = NULL;
+ Attribute *a, *ax, *an, *as = NULL;
+ BerVarray b, bx;
+ void *private;
+ int i, rc, size;
+
+ if(!op || !rs || rs->sr_type != REP_SEARCH || !rs->sr_entry)
+ return(SLAP_CB_CONTINUE);
+
+ Debug(LDAP_DEBUG_TRACE, "==> tranclucent_search_cb: %s\n",
+ rs->sr_entry->e_name.bv_val, 0, 0);
+
+ on = (slap_overinst *) op->o_bd->bd_info;
+ op->o_bd->bd_info = (BackendInfo *) on->on_info;
+
+ private = op->o_bd->be_private;
+ op->o_bd->be_private = op->o_callback->sc_private;
+
+ rc = be_entry_get_rw(op, &rs->sr_entry->e_nname, NULL, NULL, 0, &e);
+
+/*
+** if we got an entry from local backend:
+** make a copy of this search result;
+** foreach local attr:
+** foreach search result attr:
+** if match, result attr with local attr;
+** if new local, add to list;
+** append new local attrs to search result;
+**
+*/
+
+ if(e && rc == LDAP_SUCCESS) {
+ re = entry_dup(rs->sr_entry);
+ for(ax = e->e_attrs; ax; ax = ax->a_next) {
+#if 0
+ if(is_at_operational(ax->a_desc->ad_type)) continue;
+#endif
+ for(a = re->e_attrs; a; a = a->a_next) {
+ if(a->a_desc == ax->a_desc) {
+ if(a->a_vals != a->a_nvals)
+ ber_bvarray_free(a->a_nvals);
+ ber_bvarray_free(a->a_vals);
+ a->a_vals = dup_bervarray(ax->a_vals);
+ a->a_nvals = (ax->a_vals == ax->a_nvals) ?
+ a->a_vals : dup_bervarray(ax->a_nvals);
+ break;
+ }
+ }
+ if(a) continue;
+ an = attr_dup(ax);
+ an->a_next = as;
+ as = an;
+ }
+ be_entry_release_r(op, e);
+
+ /* literally append, so locals are always last */
+ if(as) {
+ if(re->e_attrs) {
+ for(ax = re->e_attrs; ax->a_next; ax = ax->a_next);
+ ax->a_next = as;
+ } else {
+ re->e_attrs = as;
+ }
+ }
+ rs->sr_entry = re;
+ rs->sr_flags |= REP_ENTRY_MUSTBEFREED;
+ }
+
+ op->o_bd->be_private = private;
+ op->o_bd->bd_info = (BackendInfo *) on;
+
+ return(SLAP_CB_CONTINUE);
+}
+
+/*
+** translucent_search()
+** search via captive backend;
+** override results with any local data;
+**
+*/
+
+static int translucent_search(Operation *op, SlapReply *rs) {
+ Operation nop = *op;
+
+ slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
+ slap_callback cb = { NULL, NULL, NULL, NULL };
+ overlay_stack *ov = on->on_bi.bi_private;
+ translucent_configuration *cf = ov->config;
+ void *private = op->o_bd->be_private;
+ int rc;
+
+ Debug(LDAP_DEBUG_TRACE, "==> translucent_search: <%s> %s\n",
+ op->o_req_dn.bv_val, op->ors_filterstr.bv_val, 0);
+ cb.sc_response = (slap_response *) translucent_search_cb;
+ cb.sc_private = private;
+
+ cb.sc_next = nop.o_callback;
+ nop.o_callback = &cb;
+
+ op->o_bd->be_private = ov->private;
+ rc = ov->info->bi_op_search(&nop, rs);
+ op->o_bd->be_private = private;
+
+ return(rs->sr_err);
+}
+
+
+/*
+** translucent_bind()
+** pass bind request to captive backend;
+**
+*/
+
+static int translucent_bind(Operation *op, SlapReply *rs) {
+ slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
+ overlay_stack *ov = on->on_bi.bi_private;
+ void *private = op->o_bd->be_private;
+ int rc = 0;
+
+ Debug(LDAP_DEBUG_TRACE, "translucent_bind: <%s> method %d\n",
+ op->o_req_dn.bv_val, op->orb_method, 0);
+
+ op->o_bd->be_private = ov->private;
+ rc = ov->info->bi_op_bind(op, rs);
+ op->o_bd->be_private = private;
+
+ return(rc);
+}
+
+/*
+** translucent_config()
+** pass config directives to captive backend;
+** parse unrecognized directives ourselves;
+**
+*/
+
+static int translucent_config(
+ BackendDB *be,
+ const char *fname,
+ int lineno,
+ int argc,
+ char **argv
+)
+{
+ slap_overinst *on = (slap_overinst *) be->bd_info;
+ overlay_stack *ov = on->on_bi.bi_private;
+ void *private = be->be_private;
+ int rc;
+
+ /* "this should never happen" */
+ if(!ov->info) {
+ fprintf(stderr, "fatal: captive backend not initialized");
+ return(1);
+ }
+
+ be->be_private = ov->private;
+ rc = ov->info->bi_db_config ? ov->info->bi_db_config(be, fname, lineno, argc, argv) : 0;
+ be->be_private = private;
+
+ /* pass okay or error up, SLAP_CONF_UNKNOWN might be ours */
+ if(rc == 0 || rc == 1) return(rc);
+
+ rc = 0;
+ if(!strcasecmp(*argv, "translucent_strict")) {
+ ov->config->strict++;
+ } else if(!strcasecmp(*argv, "translucent_no_add")) {
+ ov->config->no_add++;
+ } else if(!strcasecmp(*argv, "translucent_no_glue")) {
+ ov->config->glue++;
+ } else if(!strcasecmp(*argv, "translucent_debug")) {
+ if(argc == 1) {
+ ov->config->debug = 0xFFFF;
+ rc = 0;
+ } else if(argc == 2) {
+ ov->config->debug = atoi(argv[1]);
+ rc = 0;
+ } else {
+ fprintf(stderr, "%s: line %d: too many arguments (%d) to debug\n",
+ fname, lineno, argc);
+ rc = 1;
+ }
+ } else {
+ fprintf(stderr, "%s: line %d: unknown keyword %s\n",
+ fname, lineno, *argv);
+ rc = SLAP_CONF_UNKNOWN;
+ }
+ return(rc);
+}
+
+/*
+** translucent_db_init()
+** initialize the captive backend;
+**
+*/
+
+static int translucent_db_init(BackendDB *be) {
+ slap_overinst *on = (slap_overinst *) be->bd_info;
+ void *private = be->be_private;
+ overlay_stack *ov;
+ int rc;
+
+ Debug(LDAP_DEBUG_TRACE, "==> translucent_init\n", 0, 0, 0);
+
+ ov = ch_calloc(1, sizeof(overlay_stack));
+ ov->config = ch_calloc(1, sizeof(translucent_configuration));
+ ov->info = backend_info("ldap");
+
+ if(!ov->info) {
+ Debug(LDAP_DEBUG_ANY, "translucent: backend_info failed!\n", 0, 0, 0);
+ return(1);
+ }
+
+ /* forcibly disable schema checking on the local backend */
+ SLAP_DBFLAGS(be) |= SLAP_DBFLAG_NO_SCHEMA_CHECK;
+
+ be->be_private = NULL;
+ rc = ov->info->bi_db_init ? ov->info->bi_db_init(be) : 0;
+
+ if(rc) Debug(LDAP_DEBUG_TRACE,
+ "translucent: bi_db_init() returned error %d\n", rc, 0, 0);
+
+ ov->private = be->be_private;
+ be->be_private = private;
+ on->on_bi.bi_private = ov;
+ return(rc);
+}
+
+/*
+** translucent_open()
+** if the captive backend has an open() method, call it;
+**
+*/
+
+static int translucent_open(BackendDB *be) {
+ slap_overinst *on = (slap_overinst *) be->bd_info;
+ overlay_stack *ov = on->on_bi.bi_private;
+ void *private = be->be_private;
+ int rc;
+
+ /* "should never happen" */
+ if(!ov->info) {
+ Debug(LDAP_DEBUG_ANY, "translucent_open() called with bad ov->info\n", 0, 0, 0);
+ return(LDAP_OTHER);
+ }
+
+ Debug(LDAP_DEBUG_TRACE, "translucent_open\n", 0, 0, 0);
+
+ be->be_private = ov->private;
+ rc = ov->info->bi_db_open ? ov->info->bi_db_open(be) : 0;
+ be->be_private = private;
+
+ if(rc) Debug(LDAP_DEBUG_TRACE,
+ "translucent: bi_db_open() returned error %d\n", rc, 0, 0);
+
+ return(rc);
+}
+
+/*
+** translucent_close()
+** if the captive backend has a close() method, call it;
+** free any config data;
+**
+*/
+
+static int translucent_close(BackendDB *be) {
+ slap_overinst *on = (slap_overinst *) be->bd_info;
+ overlay_stack *ov = on->on_bi.bi_private;
+ translucent_configuration *cf = ov->config;
+ void *private = be->be_private;
+ int rc;
+
+ be->be_private = ov->private;
+ rc = (ov->info && ov->info->bi_db_close) ? ov->info->bi_db_close(be) : 0;
+ be->be_private = private;
+ if(ov->config) ch_free(ov->config);
+ ch_free(ov);
+ return(rc);
+}
+
+/*
+** translucent_init()
+** initialize the slap_overinst with our entry points;
+**
+*/
+
+int translucent_init() {
+
+ translucent.on_bi.bi_type = "translucent";
+ translucent.on_bi.bi_db_init = translucent_db_init;
+ translucent.on_bi.bi_db_config = translucent_config;
+ translucent.on_bi.bi_db_open = translucent_open;
+ translucent.on_bi.bi_db_close = translucent_close;
+ translucent.on_bi.bi_op_bind = translucent_bind;
+ translucent.on_bi.bi_op_add = translucent_add;
+ translucent.on_bi.bi_op_modify = translucent_modify;
+ translucent.on_bi.bi_op_modrdn = translucent_modrdn;
+ translucent.on_bi.bi_op_delete = translucent_delete;
+ translucent.on_bi.bi_op_search = translucent_search;
+ translucent.on_bi.bi_op_compare = translucent_compare;
+
+ return(overlay_register(&translucent));
+}
+
+#if SLAPD_OVER_TRANSLUCENT == SLAPD_MOD_DYNAMIC && defined(PIC)
+int init_module(int argc, char *argv[]) {
+ return translucent_init();
+}
+#endif
+
+#endif /* SLAPD_OVER_TRANSLUCENT */
+
--
GitLab