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Diffstat (limited to '')
| -rw-r--r-- | servers/slapd/overlays/translucent.c | 1423 |
1 files changed, 1423 insertions, 0 deletions
diff --git a/servers/slapd/overlays/translucent.c b/servers/slapd/overlays/translucent.c new file mode 100644 index 0000000..f25118b --- /dev/null +++ b/servers/slapd/overlays/translucent.c @@ -0,0 +1,1423 @@ +/* translucent.c - translucent proxy module */ +/* $OpenLDAP$ */ +/* This work is part of OpenLDAP Software <http://www.openldap.org/>. + * + * Copyright 2004-2021 The OpenLDAP Foundation. + * Portions Copyright 2005 Symas Corporation. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted only as authorized by the OpenLDAP + * Public License. + * + * A copy of this license is available in the file LICENSE in the + * top-level directory of the distribution or, alternatively, at + * <http://www.OpenLDAP.org/license.html>. + */ +/* ACKNOWLEDGEMENTS: + * This work was initially developed by Symas Corp. for inclusion in + * OpenLDAP Software. This work was sponsored by Hewlett-Packard. + */ + +#include "portable.h" + +#ifdef SLAPD_OVER_TRANSLUCENT + +#include <stdio.h> + +#include <ac/string.h> +#include <ac/socket.h> + +#include "slap.h" +#include "lutil.h" + +#include "config.h" + +/* config block */ +typedef struct translucent_info { + BackendDB db; /* captive backend */ + AttributeName *local; /* valid attrs for local filters */ + AttributeName *remote; /* valid attrs for remote filters */ + int strict; + int no_glue; + int defer_db_open; + int bind_local; + int pwmod_local; +} translucent_info; + +static ConfigLDAPadd translucent_ldadd; +static ConfigCfAdd translucent_cfadd; + +static ConfigDriver translucent_cf_gen; + +enum { + TRANS_LOCAL = 1, + TRANS_REMOTE +}; + +static ConfigTable translucentcfg[] = { + { "translucent_strict", "on|off", 1, 2, 0, + ARG_ON_OFF|ARG_OFFSET, + (void *)offsetof(translucent_info, strict), + "( OLcfgOvAt:14.1 NAME 'olcTranslucentStrict' " + "DESC 'Reveal attribute deletion constraint violations' " + "SYNTAX OMsBoolean SINGLE-VALUE )", NULL, NULL }, + { "translucent_no_glue", "on|off", 1, 2, 0, + ARG_ON_OFF|ARG_OFFSET, + (void *)offsetof(translucent_info, no_glue), + "( OLcfgOvAt:14.2 NAME 'olcTranslucentNoGlue' " + "DESC 'Disable automatic glue records for ADD and MODRDN' " + "SYNTAX OMsBoolean SINGLE-VALUE )", NULL, NULL }, + { "translucent_local", "attr[,attr...]", 1, 2, 0, + ARG_MAGIC|TRANS_LOCAL, + translucent_cf_gen, + "( OLcfgOvAt:14.3 NAME 'olcTranslucentLocal' " + "DESC 'Attributes to use in local search filter' " + "SYNTAX OMsDirectoryString )", NULL, NULL }, + { "translucent_remote", "attr[,attr...]", 1, 2, 0, + ARG_MAGIC|TRANS_REMOTE, + translucent_cf_gen, + "( OLcfgOvAt:14.4 NAME 'olcTranslucentRemote' " + "DESC 'Attributes to use in remote search filter' " + "SYNTAX OMsDirectoryString )", NULL, NULL }, + { "translucent_bind_local", "on|off", 1, 2, 0, + ARG_ON_OFF|ARG_OFFSET, + (void *)offsetof(translucent_info, bind_local), + "( OLcfgOvAt:14.5 NAME 'olcTranslucentBindLocal' " + "DESC 'Enable local bind' " + "SYNTAX OMsBoolean SINGLE-VALUE)", NULL, NULL }, + { "translucent_pwmod_local", "on|off", 1, 2, 0, + ARG_ON_OFF|ARG_OFFSET, + (void *)offsetof(translucent_info, pwmod_local), + "( OLcfgOvAt:14.6 NAME 'olcTranslucentPwModLocal' " + "DESC 'Enable local RFC 3062 Password Modify extended operation' " + "SYNTAX OMsBoolean SINGLE-VALUE)", NULL, NULL }, + { NULL, NULL, 0, 0, 0, ARG_IGNORED } +}; + +static ConfigOCs translucentocs[] = { + { "( OLcfgOvOc:14.1 " + "NAME 'olcTranslucentConfig' " + "DESC 'Translucent configuration' " + "SUP olcOverlayConfig " + "MAY ( olcTranslucentStrict $ olcTranslucentNoGlue $" + " olcTranslucentLocal $ olcTranslucentRemote $" + " olcTranslucentBindLocal $ olcTranslucentPwModLocal ) )", + Cft_Overlay, translucentcfg, NULL, translucent_cfadd }, + { "( OLcfgOvOc:14.2 " + "NAME 'olcTranslucentDatabase' " + "DESC 'Translucent target database configuration' " + /* co_table is initialized in translucent_initialize() */ + "AUXILIARY )", Cft_Misc, NULL, translucent_ldadd }, + { NULL, 0, NULL } +}; +/* for translucent_init() */ + +static int +translucent_ldadd_cleanup( ConfigArgs *ca ) +{ + slap_overinst *on = ca->ca_private; + translucent_info *ov = on->on_bi.bi_private; + + ov->defer_db_open = 0; + return backend_startup_one( ca->be, &ca->reply ); +} + +static int +translucent_ldadd( CfEntryInfo *cei, Entry *e, ConfigArgs *ca ) +{ + slap_overinst *on; + translucent_info *ov; + + Debug(LDAP_DEBUG_TRACE, "==> translucent_ldadd\n", 0, 0, 0); + + if ( cei->ce_type != Cft_Overlay || !cei->ce_bi || + cei->ce_bi->bi_cf_ocs != translucentocs ) + return LDAP_CONSTRAINT_VIOLATION; + + on = (slap_overinst *)cei->ce_bi; + ov = on->on_bi.bi_private; + ca->be = &ov->db; + ca->ca_private = on; + if ( CONFIG_ONLINE_ADD( ca )) + ca->cleanup = translucent_ldadd_cleanup; + else + ov->defer_db_open = 0; + + return LDAP_SUCCESS; +} + +static int +translucent_cfadd( Operation *op, SlapReply *rs, Entry *e, ConfigArgs *ca ) +{ + CfEntryInfo *cei = e->e_private; + slap_overinst *on = (slap_overinst *)cei->ce_bi; + translucent_info *ov = on->on_bi.bi_private; + struct berval bv; + + Debug(LDAP_DEBUG_TRACE, "==> translucent_cfadd\n", 0, 0, 0); + + /* FIXME: should not hardcode "olcDatabase" here */ + bv.bv_len = snprintf( ca->cr_msg, sizeof( ca->cr_msg ), + "olcDatabase=" SLAP_X_ORDERED_FMT "%s", + 0, ov->db.bd_info->bi_type ); + if ( bv.bv_len >= sizeof( ca->cr_msg ) ) { + return -1; + } + bv.bv_val = ca->cr_msg; + ca->be = &ov->db; + ov->defer_db_open = 0; + + /* We can only create this entry if the database is table-driven + */ + if ( ov->db.bd_info->bi_cf_ocs ) + config_build_entry( op, rs, cei, ca, &bv, + ov->db.bd_info->bi_cf_ocs, + &translucentocs[1] ); + + return 0; +} + +static int +translucent_cf_gen( ConfigArgs *c ) +{ + slap_overinst *on = (slap_overinst *)c->bi; + translucent_info *ov = on->on_bi.bi_private; + AttributeName **an, *a2; + int i; + + if ( c->type == TRANS_LOCAL ) + an = &ov->local; + else + an = &ov->remote; + + if ( c->op == SLAP_CONFIG_EMIT ) { + if ( !*an ) + return 1; + for ( i = 0; !BER_BVISNULL(&(*an)[i].an_name); i++ ) { + value_add_one( &c->rvalue_vals, &(*an)[i].an_name ); + } + return ( i < 1 ); + } else if ( c->op == LDAP_MOD_DELETE ) { + if ( c->valx < 0 ) { + anlist_free( *an, 1, NULL ); + *an = NULL; + } else { + i = c->valx; + ch_free( (*an)[i].an_name.bv_val ); + do { + (*an)[i] = (*an)[i+1]; + i++; + } while ( !BER_BVISNULL( &(*an)[i].an_name )); + } + return 0; + } + a2 = str2anlist( *an, c->argv[1], "," ); + if ( !a2 ) { + snprintf( c->cr_msg, sizeof( c->cr_msg ), "%s unable to parse attribute %s", + c->argv[0], c->argv[1] ); + Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE, + "%s: %s\n", c->log, c->cr_msg, 0 ); + return ARG_BAD_CONF; + } + *an = a2; + return 0; +} + +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 ndn = BER_BVNULL; + Attribute *a; + Entry *e; + struct berval pdn; + + dnParent( &op->o_req_ndn, &pdn ); + ber_dupbv_x( &ndn, &pdn, op->o_tmpmemctx ); + + Debug(LDAP_DEBUG_TRACE, "=> glue_parent: fabricating glue for <%s>\n", ndn.bv_val, 0, 0); + + e = entry_alloc(); + e->e_id = NOID; + ber_dupbv(&e->e_name, &ndn); + ber_dupbv(&e->e_nname, &ndn); + + a = attr_alloc( slap_schema.si_ad_objectClass ); + a->a_numvals = 2; + 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 = attr_alloc( slap_schema.si_ad_structuralObjectClass ); + a->a_numvals = 1; + 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 = ndn; + nop.o_req_ndn = ndn; + nop.ora_e = e; + + nop.o_bd->bd_info = (BackendInfo *) on->on_info->oi_orig; + syncrepl_add_glue(&nop, e); + nop.o_bd->bd_info = (BackendInfo *) on; + + op->o_tmpfree( ndn.bv_val, op->o_tmpmemctx ); + + return; +} + +/* +** free_attr_chain() +** free only the Attribute*, not the contents; +** +*/ +void free_attr_chain(Attribute *b) { + Attribute *a; + for(a=b; a; a=a->a_next) { + a->a_vals = NULL; + a->a_nvals = NULL; + } + attrs_free( b ); + return; +} + +/* +** translucent_add() +** if not bound as root, send ACCESS error; +** if glue, glue_parent(); +** return CONTINUE; +** +*/ + +static int translucent_add(Operation *op, SlapReply *rs) { + slap_overinst *on = (slap_overinst *) op->o_bd->bd_info; + translucent_info *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"); + op->o_bd->bd_info = (BackendInfo *) on; + return(rs->sr_err); + } + if(!ov->no_glue) glue_parent(op); + return(SLAP_CB_CONTINUE); +} + +/* +** translucent_modrdn() +** if not bound as root, send ACCESS error; +** if !glue, glue_parent(); +** else return CONTINUE; +** +*/ + +static int translucent_modrdn(Operation *op, SlapReply *rs) { + slap_overinst *on = (slap_overinst *) op->o_bd->bd_info; + translucent_info *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"); + op->o_bd->bd_info = (BackendInfo *) on; + return(rs->sr_err); + } + if(!ov->no_glue) { + op->o_tag = LDAP_REQ_ADD; + glue_parent(op); + op->o_tag = LDAP_REQ_MODRDN; + } + 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"); + op->o_bd->bd_info = (BackendInfo *) on; + return(rs->sr_err); + } + return(SLAP_CB_CONTINUE); +} + +static int +translucent_tag_cb( Operation *op, SlapReply *rs ) +{ + op->o_tag = LDAP_REQ_MODIFY; + op->orm_modlist = op->o_callback->sc_private; + rs->sr_tag = slap_req2res( op->o_tag ); + + 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 }; + + slap_overinst *on = (slap_overinst *) op->o_bd->bd_info; + translucent_info *ov = on->on_bi.bi_private; + Entry *e = NULL, *re = NULL; + Attribute *a, *ax; + Modifications *m, **mm; + BackendDB *db; + int del, rc, erc = 0; + slap_callback cb = { 0 }; + + Debug(LDAP_DEBUG_TRACE, "==> translucent_modify: %s\n", + op->o_req_dn.bv_val, 0, 0); + + if(ov->defer_db_open) { + send_ldap_error(op, rs, LDAP_UNAVAILABLE, + "remote DB not available"); + return(rs->sr_err); + } +/* +** fetch entry from the captive backend; +** if it did not exist, fail; +** release it, if captive backend supports this; +** +*/ + + db = op->o_bd; + op->o_bd = &ov->db; + ov->db.be_acl = op->o_bd->be_acl; + rc = ov->db.bd_info->bi_entry_get_rw(op, &op->o_req_ndn, NULL, NULL, 0, &re); + op->o_bd = db; + if(rc != LDAP_SUCCESS || re == NULL ) { + 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; +** +*/ + + op->o_bd->bd_info = (BackendInfo *) on->on_info->oi_orig; + rc = be_entry_get_rw(op, &op->o_req_ndn, NULL, NULL, 0, &e); + op->o_bd->bd_info = (BackendInfo *) on; + + if(e && rc == LDAP_SUCCESS) { + Debug(LDAP_DEBUG_TRACE, "=> translucent_modify: found local entry\n", 0, 0, 0); + for(mm = &op->orm_modlist; *mm; ) { + m = *mm; + for(a = e->e_attrs; a; a = a->a_next) + if(a->a_desc == m->sml_desc) break; + if(a) { + mm = &m->sml_next; + 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->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); + *mm = m->sml_next; + m->sml_next = NULL; + slap_mods_free(m, 1); + continue; + } + m->sml_op = LDAP_MOD_ADD; + mm = &m->sml_next; + } + erc = SLAP_CB_CONTINUE; +release: + if(re) { + if(ov->db.bd_info->bi_entry_release_rw) { + op->o_bd = &ov->db; + ov->db.bd_info->bi_entry_release_rw(op, re, 0); + op->o_bd = db; + } else + entry_free(re); + } + op->o_bd->bd_info = (BackendInfo *) on->on_info->oi_orig; + be_entry_release_r(op, e); + op->o_bd->bd_info = (BackendInfo *) on; + if(erc == SLAP_CB_CONTINUE) { + return(erc); + } else if(erc) { + send_ldap_error(op, rs, erc, + "attempt to delete nonexistent attribute"); + return(erc); + } + } + + /* don't leak remote entry copy */ + if(re) { + if(ov->db.bd_info->bi_entry_release_rw) { + op->o_bd = &ov->db; + ov->db.bd_info->bi_entry_release_rw(op, re, 0); + op->o_bd = db; + } else + entry_free(re); + } +/* +** foreach Modification: +** if MOD_ADD or MOD_REPLACE, add Attribute; +** if no Modifications were suitable: +** if 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) { + Attribute atmp; + 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; + } + atmp.a_desc = m->sml_desc; + atmp.a_vals = m->sml_values; + atmp.a_nvals = m->sml_nvalues ? m->sml_nvalues : atmp.a_vals; + atmp.a_numvals = m->sml_numvals; + atmp.a_flags = 0; + a = attr_dup( &atmp ); + a->a_next = ax; + ax = a; + } + + if(del && ov->strict) { + attrs_free( a ); + send_ldap_error(op, rs, LDAP_CONSTRAINT_VIOLATION, + "attempt to delete attributes from local database"); + return(rs->sr_err); + } + + if(!ax) { + if(ov->strict) { + send_ldap_error(op, rs, LDAP_CONSTRAINT_VIOLATION, + "modification contained other than ADD or REPLACE"); + return(rs->sr_err); + } + /* rs->sr_text = "no valid modification found"; */ + rs->sr_err = LDAP_SUCCESS; + send_ldap_result(op, rs); + return(rs->sr_err); + } + + e = entry_alloc(); + ber_dupbv( &e->e_name, &op->o_req_dn ); + ber_dupbv( &e->e_nname, &op->o_req_ndn ); + e->e_attrs = a; + + op->o_tag = LDAP_REQ_ADD; + cb.sc_response = translucent_tag_cb; + cb.sc_private = op->orm_modlist; + op->oq_add.rs_e = e; + + glue_parent(op); + + cb.sc_next = op->o_callback; + op->o_callback = &cb; + rc = on->on_info->oi_orig->bi_op_add(op, &nrs); + if ( op->ora_e == e ) + entry_free( e ); + op->o_callback = cb.sc_next; + + return(rc); +} + +static int translucent_compare(Operation *op, SlapReply *rs) { + slap_overinst *on = (slap_overinst *) op->o_bd->bd_info; + translucent_info *ov = on->on_bi.bi_private; + AttributeAssertion *ava = op->orc_ava; + Entry *e = NULL; + BackendDB *db; + 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; +** +*/ + rc = overlay_entry_get_ov(op, &op->o_req_ndn, NULL, ava->aa_desc, 0, &e, on); + if(rc == LDAP_SUCCESS && e) { + overlay_entry_release_ov(op, e, 0, on); + return(SLAP_CB_CONTINUE); + } + + if(ov->defer_db_open) { + send_ldap_error(op, rs, LDAP_UNAVAILABLE, + "remote DB not available"); + return(rs->sr_err); + } +/* +** call compare() in the captive backend; +** return the result; +** +*/ + db = op->o_bd; + op->o_bd = &ov->db; + ov->db.be_acl = op->o_bd->be_acl; + rc = ov->db.bd_info->bi_op_compare(op, rs); + op->o_bd = db; + + return(rc); +} + +static int translucent_pwmod(Operation *op, SlapReply *rs) { + SlapReply nrs = { REP_RESULT }; + Operation nop; + + slap_overinst *on = (slap_overinst *) op->o_bd->bd_info; + translucent_info *ov = on->on_bi.bi_private; + Entry *e = NULL, *re = NULL; + BackendDB *db; + int rc = 0; + slap_callback cb = { 0 }; + + if (!ov->pwmod_local) { + rs->sr_err = LDAP_CONSTRAINT_VIOLATION, + rs->sr_text = "attempt to modify password in local database"; + return rs->sr_err; + } + +/* +** fetch entry from the captive backend; +** if it did not exist, fail; +** release it, if captive backend supports this; +** +*/ + db = op->o_bd; + op->o_bd = &ov->db; + ov->db.be_acl = op->o_bd->be_acl; + rc = ov->db.bd_info->bi_entry_get_rw(op, &op->o_req_ndn, NULL, NULL, 0, &re); + if(rc != LDAP_SUCCESS || re == NULL ) { + send_ldap_error((op), rs, LDAP_NO_SUCH_OBJECT, + "attempt to modify nonexistent local record"); + return(rs->sr_err); + } + op->o_bd = db; +/* +** fetch entry from local backend; +** if it exists: +** return CONTINUE; +*/ + + op->o_bd->bd_info = (BackendInfo *) on->on_info->oi_orig; + rc = be_entry_get_rw(op, &op->o_req_ndn, NULL, NULL, 0, &e); + op->o_bd->bd_info = (BackendInfo *) on; + + if(e && rc == LDAP_SUCCESS) { + if(re) { + if(ov->db.bd_info->bi_entry_release_rw) { + op->o_bd = &ov->db; + ov->db.bd_info->bi_entry_release_rw(op, re, 0); + op->o_bd = db; + } else { + entry_free(re); + } + } + op->o_bd->bd_info = (BackendInfo *) on->on_info->oi_orig; + be_entry_release_r(op, e); + op->o_bd->bd_info = (BackendInfo *) on; + return SLAP_CB_CONTINUE; + } + + /* don't leak remote entry copy */ + if(re) { + if(ov->db.bd_info->bi_entry_release_rw) { + op->o_bd = &ov->db; + ov->db.bd_info->bi_entry_release_rw(op, re, 0); + op->o_bd = db; + } else { + entry_free(re); + } + } +/* +** glue_parent() for this Entry; +** call bi_op_add() in local backend; +** +*/ + e = entry_alloc(); + ber_dupbv( &e->e_name, &op->o_req_dn ); + ber_dupbv( &e->e_nname, &op->o_req_ndn ); + e->e_attrs = NULL; + + nop = *op; + nop.o_tag = LDAP_REQ_ADD; + cb.sc_response = slap_null_cb; + nop.oq_add.rs_e = e; + + glue_parent(&nop); + + nop.o_callback = &cb; + rc = on->on_info->oi_orig->bi_op_add(&nop, &nrs); + if ( nop.ora_e == e ) { + entry_free( e ); + } + + if ( rc == LDAP_SUCCESS ) { + return SLAP_CB_CONTINUE; + } + + return rc; +} + +static int translucent_exop(Operation *op, SlapReply *rs) { + slap_overinst *on = (slap_overinst *) op->o_bd->bd_info; + translucent_info *ov = on->on_bi.bi_private; + const struct berval bv_exop_pwmod = BER_BVC(LDAP_EXOP_MODIFY_PASSWD); + + Debug(LDAP_DEBUG_TRACE, "==> translucent_exop: %s\n", + op->o_req_dn.bv_val, 0, 0); + + if(ov->defer_db_open) { + send_ldap_error(op, rs, LDAP_UNAVAILABLE, + "remote DB not available"); + return(rs->sr_err); + } + + if ( bvmatch( &bv_exop_pwmod, &op->ore_reqoid ) ) { + return translucent_pwmod( op, rs ); + } + + return SLAP_CB_CONTINUE; +} + +/* +** translucent_search_cb() +** merge local data with remote data +** +** Four cases: +** 1: remote search, no local filter +** merge data and send immediately +** 2: remote search, with local filter +** merge data and save +** 3: local search, no remote filter +** merge data and send immediately +** 4: local search, with remote filter +** check list, merge, send, delete +*/ + +#define RMT_SIDE 0 +#define LCL_SIDE 1 +#define USE_LIST 2 + +typedef struct trans_ctx { + BackendDB *db; + slap_overinst *on; + Filter *orig; + Avlnode *list; + int step; + int slimit; + AttributeName *attrs; +} trans_ctx; + +static int translucent_search_cb(Operation *op, SlapReply *rs) { + trans_ctx *tc; + BackendDB *db; + slap_overinst *on; + translucent_info *ov; + Entry *le, *re; + Attribute *a, *ax, *an, *as = NULL; + int rc; + int test_f = 0; + + tc = op->o_callback->sc_private; + + /* Don't let the op complete while we're gathering data */ + if ( rs->sr_type == REP_RESULT && ( tc->step & USE_LIST )) + return 0; + + if(rs->sr_type != REP_SEARCH || !rs->sr_entry) + return(SLAP_CB_CONTINUE); + + Debug(LDAP_DEBUG_TRACE, "==> translucent_search_cb: %s\n", + rs->sr_entry->e_name.bv_val, 0, 0); + + op->ors_slimit = tc->slimit + ( tc->slimit > 0 ? 1 : 0 ); + if ( op->ors_attrs == slap_anlist_all_attributes ) { + op->ors_attrs = tc->attrs; + rs->sr_attrs = tc->attrs; + rs->sr_attr_flags = slap_attr_flags( rs->sr_attrs ); + } + + on = tc->on; + ov = on->on_bi.bi_private; + + db = op->o_bd; + re = NULL; + + /* If we have local, get remote */ + if ( tc->step & LCL_SIDE ) { + le = rs->sr_entry; + /* If entry is already on list, use it */ + if ( tc->step & USE_LIST ) { + re = tavl_delete( &tc->list, le, entry_dn_cmp ); + if ( re ) { + rs_flush_entry( op, rs, on ); + rc = test_filter( op, re, tc->orig ); + if ( rc == LDAP_COMPARE_TRUE ) { + rs->sr_flags |= REP_ENTRY_MUSTBEFREED; + rs->sr_entry = re; + + if ( tc->slimit >= 0 && rs->sr_nentries >= tc->slimit ) { + return LDAP_SIZELIMIT_EXCEEDED; + } + + return SLAP_CB_CONTINUE; + } else { + entry_free( re ); + rs->sr_entry = NULL; + return 0; + } + } + } + op->o_bd = &ov->db; + rc = be_entry_get_rw( op, &rs->sr_entry->e_nname, NULL, NULL, 0, &re ); + if ( rc == LDAP_SUCCESS && re ) { + Entry *tmp = entry_dup( re ); + be_entry_release_r( op, re ); + re = tmp; + test_f = 1; + } + } else { + /* Else we have remote, get local */ + op->o_bd = tc->db; + le = NULL; + rc = overlay_entry_get_ov(op, &rs->sr_entry->e_nname, NULL, NULL, 0, &le, on); + if ( rc == LDAP_SUCCESS && le ) { + re = entry_dup( rs->sr_entry ); + rs_flush_entry( op, rs, on ); + } else { + le = NULL; + } + } + +/* +** if we got remote and local entry: +** foreach local attr: +** foreach remote attr: +** if match, remote attr with local attr; +** if new local, add to list; +** append new local attrs to remote; +** +*/ + + if ( re && le ) { + for(ax = le->e_attrs; ax; ax = ax->a_next) { + for(a = re->e_attrs; a; a = a->a_next) { + if(a->a_desc == ax->a_desc) { + test_f = 1; + if(a->a_vals != a->a_nvals) + ber_bvarray_free(a->a_nvals); + ber_bvarray_free(a->a_vals); + ber_bvarray_dup_x( &a->a_vals, ax->a_vals, NULL ); + if ( ax->a_vals == ax->a_nvals ) { + a->a_nvals = a->a_vals; + } else { + ber_bvarray_dup_x( &a->a_nvals, ax->a_nvals, NULL ); + } + break; + } + } + if(a) continue; + an = attr_dup(ax); + an->a_next = as; + as = an; + } + /* Dispose of local entry */ + if ( tc->step & LCL_SIDE ) { + rs_flush_entry(op, rs, on); + } else { + overlay_entry_release_ov(op, le, 0, on); + } + + /* 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; + } + } + /* If both filters, save entry for later */ + if ( tc->step == (USE_LIST|RMT_SIDE) ) { + tavl_insert( &tc->list, re, entry_dn_cmp, avl_dup_error ); + rs->sr_entry = NULL; + rc = 0; + } else { + /* send it now */ + rs->sr_entry = re; + rs->sr_flags |= REP_ENTRY_MUSTBEFREED; + if ( test_f ) { + rc = test_filter( op, rs->sr_entry, tc->orig ); + if ( rc == LDAP_COMPARE_TRUE ) { + rc = SLAP_CB_CONTINUE; + } else { + rc = 0; + } + } else { + rc = SLAP_CB_CONTINUE; + } + } + } else if ( le ) { + /* Only a local entry: remote was deleted + * Ought to delete the local too... + */ + rc = 0; + } else if ( tc->step & USE_LIST ) { + /* Only a remote entry, but both filters: + * Test the complete filter + */ + rc = test_filter( op, rs->sr_entry, tc->orig ); + if ( rc == LDAP_COMPARE_TRUE ) { + rc = SLAP_CB_CONTINUE; + } else { + rc = 0; + } + } else { + /* Only a remote entry, only remote filter: + * just pass thru + */ + rc = SLAP_CB_CONTINUE; + } + + op->o_bd = db; + + if ( rc == SLAP_CB_CONTINUE && tc->slimit >= 0 && rs->sr_nentries >= tc->slimit ) { + return LDAP_SIZELIMIT_EXCEEDED; + } + + return rc; +} + +/* Dup the filter, excluding invalid elements */ +static Filter * +trans_filter_dup(Operation *op, Filter *f, AttributeName *an) +{ + Filter *n = NULL; + + if ( !f ) + return NULL; + + switch( f->f_choice & SLAPD_FILTER_MASK ) { + case SLAPD_FILTER_COMPUTED: + n = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx ); + n->f_choice = f->f_choice; + n->f_result = f->f_result; + n->f_next = NULL; + break; + + case LDAP_FILTER_PRESENT: + if ( ad_inlist( f->f_desc, an )) { + n = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx ); + n->f_choice = f->f_choice; + n->f_desc = f->f_desc; + n->f_next = NULL; + } + break; + + case LDAP_FILTER_EQUALITY: + case LDAP_FILTER_GE: + case LDAP_FILTER_LE: + case LDAP_FILTER_APPROX: + case LDAP_FILTER_SUBSTRINGS: + case LDAP_FILTER_EXT: + if ( !f->f_av_desc || ad_inlist( f->f_av_desc, an )) { + n = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx ); + n->f_choice = f->f_choice; + n->f_ava = f->f_ava; + n->f_next = NULL; + } + break; + + case LDAP_FILTER_AND: + case LDAP_FILTER_OR: + case LDAP_FILTER_NOT: { + Filter **p; + + n = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx ); + n->f_choice = f->f_choice; + n->f_next = NULL; + + for ( p = &n->f_list, f = f->f_list; f; f = f->f_next ) { + *p = trans_filter_dup( op, f, an ); + if ( !*p ) + continue; + p = &(*p)->f_next; + } + /* nothing valid in this list */ + if ( !n->f_list ) { + op->o_tmpfree( n, op->o_tmpmemctx ); + return NULL; + } + /* Only 1 element in this list */ + if ((n->f_choice & SLAPD_FILTER_MASK) != LDAP_FILTER_NOT && + !n->f_list->f_next ) { + f = n->f_list; + *n = *f; + op->o_tmpfree( f, op->o_tmpmemctx ); + } + break; + } + } + return n; +} + +static void +trans_filter_free( Operation *op, Filter *f ) +{ + Filter *n, *p, *next; + + f->f_choice &= SLAPD_FILTER_MASK; + + switch( f->f_choice ) { + case LDAP_FILTER_AND: + case LDAP_FILTER_OR: + case LDAP_FILTER_NOT: + /* Free in reverse order */ + n = NULL; + for ( p = f->f_list; p; p = next ) { + next = p->f_next; + p->f_next = n; + n = p; + } + for ( p = n; p; p = next ) { + next = p->f_next; + trans_filter_free( op, p ); + } + break; + default: + break; + } + op->o_tmpfree( f, op->o_tmpmemctx ); +} + +/* +** translucent_search() +** search via captive backend; +** override results with any local data; +** +*/ + +static int translucent_search(Operation *op, SlapReply *rs) { + slap_overinst *on = (slap_overinst *) op->o_bd->bd_info; + translucent_info *ov = on->on_bi.bi_private; + slap_callback cb = { NULL, NULL, NULL, NULL }; + trans_ctx tc; + Filter *fl, *fr; + struct berval fbv; + int rc = 0; + + if ( op->o_managedsait > SLAP_CONTROL_IGNORED ) + return SLAP_CB_CONTINUE; + + Debug(LDAP_DEBUG_TRACE, "==> translucent_search: <%s> %s\n", + op->o_req_dn.bv_val, op->ors_filterstr.bv_val, 0); + + if(ov->defer_db_open) { + send_ldap_error(op, rs, LDAP_UNAVAILABLE, + "remote DB not available"); + return(rs->sr_err); + } + + fr = ov->remote ? trans_filter_dup( op, op->ors_filter, ov->remote ) : NULL; + fl = ov->local ? trans_filter_dup( op, op->ors_filter, ov->local ) : NULL; + cb.sc_response = (slap_response *) translucent_search_cb; + cb.sc_private = &tc; + cb.sc_next = op->o_callback; + + ov->db.be_acl = op->o_bd->be_acl; + tc.db = op->o_bd; + tc.on = on; + tc.orig = op->ors_filter; + tc.list = NULL; + tc.step = 0; + tc.slimit = op->ors_slimit; + tc.attrs = NULL; + fbv = op->ors_filterstr; + + op->o_callback = &cb; + + if ( fr || !fl ) { + tc.attrs = op->ors_attrs; + op->ors_slimit = SLAP_NO_LIMIT; + op->ors_attrs = slap_anlist_all_attributes; + op->o_bd = &ov->db; + tc.step |= RMT_SIDE; + if ( fl ) { + tc.step |= USE_LIST; + op->ors_filter = fr; + filter2bv_x( op, fr, &op->ors_filterstr ); + } + rc = ov->db.bd_info->bi_op_search(op, rs); + if ( op->ors_attrs == slap_anlist_all_attributes ) + op->ors_attrs = tc.attrs; + op->o_bd = tc.db; + if ( fl ) { + op->o_tmpfree( op->ors_filterstr.bv_val, op->o_tmpmemctx ); + } + } + if ( fl && !rc ) { + tc.step |= LCL_SIDE; + op->ors_filter = fl; + filter2bv_x( op, fl, &op->ors_filterstr ); + rc = overlay_op_walk( op, rs, op_search, on->on_info, on->on_next ); + op->o_tmpfree( op->ors_filterstr.bv_val, op->o_tmpmemctx ); + } + op->ors_filterstr = fbv; + op->ors_filter = tc.orig; + op->o_callback = cb.sc_next; + rs->sr_attrs = op->ors_attrs; + rs->sr_attr_flags = slap_attr_flags( rs->sr_attrs ); + + /* Send out anything remaining on the list and finish */ + if ( tc.step & USE_LIST ) { + if ( tc.list ) { + Avlnode *av; + + av = tavl_end( tc.list, TAVL_DIR_LEFT ); + while ( av ) { + rs->sr_entry = av->avl_data; + if ( rc == LDAP_SUCCESS && LDAP_COMPARE_TRUE == + test_filter( op, rs->sr_entry, op->ors_filter )) + { + rs->sr_flags = REP_ENTRY_MUSTBEFREED; + rc = send_search_entry( op, rs ); + } else { + entry_free( rs->sr_entry ); + } + av = tavl_next( av, TAVL_DIR_RIGHT ); + } + tavl_free( tc.list, NULL ); + rs->sr_flags = 0; + rs->sr_entry = NULL; + } + send_ldap_result( op, rs ); + } + + op->ors_slimit = tc.slimit; + + /* Free in reverse order */ + if ( fl ) + trans_filter_free( op, fl ); + if ( fr ) + trans_filter_free( op, fr ); + + return rc; +} + + +/* +** 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; + translucent_info *ov = on->on_bi.bi_private; + BackendDB *db; + slap_callback sc = { 0 }, *save_cb; + int rc; + + Debug(LDAP_DEBUG_TRACE, "translucent_bind: <%s> method %d\n", + op->o_req_dn.bv_val, op->orb_method, 0); + + if(ov->defer_db_open) { + send_ldap_error(op, rs, LDAP_UNAVAILABLE, + "remote DB not available"); + return(rs->sr_err); + } + + if (ov->bind_local) { + sc.sc_response = slap_null_cb; + save_cb = op->o_callback; + op->o_callback = ≻ + } + + db = op->o_bd; + op->o_bd = &ov->db; + ov->db.be_acl = op->o_bd->be_acl; + rc = ov->db.bd_info->bi_op_bind(op, rs); + op->o_bd = db; + + if (ov->bind_local) { + op->o_callback = save_cb; + if (rc != LDAP_SUCCESS) { + rc = SLAP_CB_CONTINUE; + } + } + + return rc; +} + +/* +** translucent_connection_destroy() +** pass disconnect notification to captive backend; +** +*/ + +static int translucent_connection_destroy(BackendDB *be, Connection *conn) { + slap_overinst *on = (slap_overinst *) be->bd_info; + translucent_info *ov = on->on_bi.bi_private; + int rc = 0; + + Debug(LDAP_DEBUG_TRACE, "translucent_connection_destroy\n", 0, 0, 0); + + rc = ov->db.bd_info->bi_connection_destroy(&ov->db, conn); + + return(rc); +} + +/* +** translucent_db_config() +** pass config directives to captive backend; +** parse unrecognized directives ourselves; +** +*/ + +static int translucent_db_config( + BackendDB *be, + const char *fname, + int lineno, + int argc, + char **argv +) +{ + slap_overinst *on = (slap_overinst *) be->bd_info; + translucent_info *ov = on->on_bi.bi_private; + + Debug(LDAP_DEBUG_TRACE, "==> translucent_db_config: %s\n", + argc ? argv[0] : "", 0, 0); + + /* Something for the captive database? */ + if ( ov->db.bd_info && ov->db.bd_info->bi_db_config ) + return ov->db.bd_info->bi_db_config( &ov->db, fname, lineno, + argc, argv ); + return SLAP_CONF_UNKNOWN; +} + +/* +** translucent_db_init() +** initialize the captive backend; +** +*/ + +static int translucent_db_init(BackendDB *be, ConfigReply *cr) { + slap_overinst *on = (slap_overinst *) be->bd_info; + translucent_info *ov; + + Debug(LDAP_DEBUG_TRACE, "==> translucent_db_init\n", 0, 0, 0); + + ov = ch_calloc(1, sizeof(translucent_info)); + on->on_bi.bi_private = ov; + ov->db = *be; + ov->db.be_private = NULL; + ov->defer_db_open = 1; + + if ( !backend_db_init( "ldap", &ov->db, -1, NULL )) { + Debug( LDAP_DEBUG_CONFIG, "translucent: unable to open captive back-ldap\n", 0, 0, 0); + return 1; + } + SLAP_DBFLAGS(be) |= SLAP_DBFLAG_NO_SCHEMA_CHECK; + SLAP_DBFLAGS(be) |= SLAP_DBFLAG_NOLASTMOD; + + return 0; +} + +/* +** translucent_db_open() +** if the captive backend has an open() method, call it; +** +*/ + +static int translucent_db_open(BackendDB *be, ConfigReply *cr) { + slap_overinst *on = (slap_overinst *) be->bd_info; + translucent_info *ov = on->on_bi.bi_private; + int rc; + + Debug(LDAP_DEBUG_TRACE, "==> translucent_db_open\n", 0, 0, 0); + + /* need to inherit something from the original database... */ + ov->db.be_def_limit = be->be_def_limit; + ov->db.be_limits = be->be_limits; + ov->db.be_acl = be->be_acl; + ov->db.be_dfltaccess = be->be_dfltaccess; + + if ( ov->defer_db_open ) + return 0; + + rc = backend_startup_one( &ov->db, cr ); + + if(rc) Debug(LDAP_DEBUG_TRACE, + "translucent: bi_db_open() returned error %d\n", rc, 0, 0); + + return(rc); +} + +/* +** translucent_db_close() +** if the captive backend has a close() method, call it +** +*/ + +static int +translucent_db_close( BackendDB *be, ConfigReply *cr ) +{ + slap_overinst *on = (slap_overinst *) be->bd_info; + translucent_info *ov = on->on_bi.bi_private; + int rc = 0; + + Debug(LDAP_DEBUG_TRACE, "==> translucent_db_close\n", 0, 0, 0); + + if ( ov && ov->db.bd_info && ov->db.bd_info->bi_db_close ) { + rc = ov->db.bd_info->bi_db_close(&ov->db, NULL); + } + + return(rc); +} + +/* +** translucent_db_destroy() +** if the captive backend has a db_destroy() method, call it; +** free any config data +** +*/ + +static int +translucent_db_destroy( BackendDB *be, ConfigReply *cr ) +{ + slap_overinst *on = (slap_overinst *) be->bd_info; + translucent_info *ov = on->on_bi.bi_private; + int rc = 0; + + Debug(LDAP_DEBUG_TRACE, "==> translucent_db_destroy\n", 0, 0, 0); + + if ( ov ) { + if ( ov->remote ) + anlist_free( ov->remote, 1, NULL ); + if ( ov->local ) + anlist_free( ov->local, 1, NULL ); + if ( ov->db.be_private != NULL ) { + backend_stopdown_one( &ov->db ); + } + + ldap_pvt_thread_mutex_destroy( &ov->db.be_pcl_mutex ); + ch_free(ov); + on->on_bi.bi_private = NULL; + } + + return(rc); +} + +/* +** translucent_initialize() +** initialize the slap_overinst with our entry points; +** +*/ + +int translucent_initialize() { + + int rc; + + /* olcDatabaseDummy is defined in slapd, and Windows + will not let us initialize a struct element with a data pointer + from another library, so we have to initialize this element + "by hand". */ + translucentocs[1].co_table = olcDatabaseDummy; + + Debug(LDAP_DEBUG_TRACE, "==> translucent_initialize\n", 0, 0, 0); + + translucent.on_bi.bi_type = "translucent"; + translucent.on_bi.bi_db_init = translucent_db_init; + translucent.on_bi.bi_db_config = translucent_db_config; + translucent.on_bi.bi_db_open = translucent_db_open; + translucent.on_bi.bi_db_close = translucent_db_close; + translucent.on_bi.bi_db_destroy = translucent_db_destroy; + 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; + translucent.on_bi.bi_connection_destroy = translucent_connection_destroy; + translucent.on_bi.bi_extended = translucent_exop; + + translucent.on_bi.bi_cf_ocs = translucentocs; + rc = config_register_schema ( translucentcfg, translucentocs ); + if ( rc ) return rc; + + return(overlay_register(&translucent)); +} + +#if SLAPD_OVER_TRANSLUCENT == SLAPD_MOD_DYNAMIC && defined(PIC) +int init_module(int argc, char *argv[]) { + return translucent_initialize(); +} +#endif + +#endif /* SLAPD_OVER_TRANSLUCENT */ |