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-rw-r--r--system/openldap/openldap-mqtt-overlay.patch447
1 files changed, 447 insertions, 0 deletions
diff --git a/system/openldap/openldap-mqtt-overlay.patch b/system/openldap/openldap-mqtt-overlay.patch
new file mode 100644
index 000000000..795480f1e
--- /dev/null
+++ b/system/openldap/openldap-mqtt-overlay.patch
@@ -0,0 +1,447 @@
+diff --git a/contrib/slapd-modules/mqtt/Makefile b/contrib/slapd-modules/mqtt/Makefile
+new file mode 100644
+index 0000000..2cb4db7
+--- /dev/null
++++ b/contrib/slapd-modules/mqtt/Makefile
+@@ -0,0 +1,45 @@
++# $OpenLDAP$
++
++LDAP_SRC = ../../..
++LDAP_BUILD = ../../..
++LDAP_INC = -I$(LDAP_BUILD)/include -I$(LDAP_SRC)/include -I$(LDAP_SRC)/servers/slapd
++LDAP_LIB = $(LDAP_BUILD)/libraries/libldap_r/libldap_r.la \
++ $(LDAP_BUILD)/libraries/liblber/liblber.la
++
++LIBTOOL = $(LDAP_BUILD)/libtool
++CC = gcc
++OPT = -g -O2 -Wall
++DEFS =
++INCS = $(LDAP_INC)
++LIBS = $(LDAP_LIB) -lmosquitto
++
++PROGRAMS = mqtt.la
++LTVER = 0:0:0
++
++prefix=/usr/local
++exec_prefix=$(prefix)
++ldap_subdir=/openldap
++
++libdir=$(exec_prefix)/lib
++libexecdir=$(exec_prefix)/libexec
++moduledir = $(libdir)$(ldap_subdir)
++
++.SUFFIXES: .c .o .lo
++
++.c.lo:
++ $(LIBTOOL) --mode=compile $(CC) $(OPT) $(DEFS) $(INCS) -c $<
++
++all: $(PROGRAMS)
++
++mqtt.la: mqtt.lo
++ $(LIBTOOL) --mode=link $(CC) $(OPT) -version-info $(LTVER) \
++ -rpath $(moduledir) -module -o $@ $? $(LIBS)
++
++clean:
++ rm -rf *.o *.lo *.la .libs
++
++install: $(PROGRAMS)
++ mkdir -p $(DESTDIR)$(moduledir)
++ for p in $(PROGRAMS) ; do \
++ $(LIBTOOL) --mode=install cp $$p $(DESTDIR)$(moduledir) ; \
++ done
+diff --git a/contrib/slapd-modules/mqtt/mqtt.c b/contrib/slapd-modules/mqtt/mqtt.c
+new file mode 100644
+index 0000000..b3a0a31
+--- /dev/null
++++ b/contrib/slapd-modules/mqtt/mqtt.c
+@@ -0,0 +1,389 @@
++/* $OpenLDAP$ */
++/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
++ *
++ * Copyright 2014 Timo Teräs <timo.teras@iki.fi>.
++ * 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 file LICENSE in the
++ * top-level directory of the distribution or, alternatively, at
++ * http://www.OpenLDAP.org/license.html.
++ */
++/* mqtt-overlay
++ *
++ * This is an OpenLDAP overlay that... */
++
++#include <mosquitto.h>
++#include <unistd.h>
++
++#include "portable.h"
++#include "slap.h"
++#include "config.h"
++
++typedef struct mqtt_notify_t {
++ struct mqtt_notify_t *next;
++ char *topic;
++ char *dn_group_str;
++ char *oc_group_str;
++ char *str_member;
++
++ struct berval ndn_group;
++ ObjectClass *oc_group;
++ AttributeDescription *ad_member;
++ int notify_pending;
++} mqtt_notify_t;
++
++typedef struct mqtt_t {
++ struct mosquitto *mq;
++ int port;
++ char *hostname, *username, *password;
++ mqtt_notify_t *notify_map;
++} mqtt_t;
++
++static ConfigDriver mqtt_config_notify;
++
++static ConfigTable mqttcfg[] = {
++ { "mqtt-hostname", "hostname", 2, 2, 0,
++ ARG_STRING|ARG_OFFSET, (void *)offsetof(mqtt_t, hostname),
++ "( OLcfgCtAt:5.1 NAME 'olcMqttHostname' "
++ "DESC 'Hostname of MQTT broker' "
++ "SYNTAX OMsDirectoryString SINGLE-VALUE )",
++ NULL, NULL },
++ { "mqtt-port", "port", 2, 2, 0,
++ ARG_INT|ARG_OFFSET, (void *)offsetof(mqtt_t, port),
++ "( OLcfgCtAt:5.2 NAME 'olcMqttPort' "
++ "DESC 'Port of MQTT broker' "
++ "SYNTAX OMsInteger SINGLE-VALUE )",
++ NULL, NULL },
++ { "mqtt-username", "username", 2, 2, 0,
++ ARG_STRING|ARG_OFFSET, (void *)offsetof(mqtt_t, username),
++ "( OLcfgCtAt:5.3 NAME 'olcMqttUsername' "
++ "DESC 'Username for MQTT broker' "
++ "SYNTAX OMsDirectoryString SINGLE-VALUE )",
++ NULL, NULL },
++ { "mqtt-password", "password", 2, 2, 0,
++ ARG_STRING|ARG_OFFSET, (void *)offsetof(mqtt_t, password),
++ "( OLcfgCtAt:5.4 NAME 'olcMqttPassword' "
++ "DESC 'Password for MQTT broker' "
++ "SYNTAX OMsDirectoryString SINGLE-VALUE )",
++ NULL, NULL },
++ { "mqtt-notify-password", "topic> <group-dn> <group-oc> <member-ad", 2, 5, 0,
++ ARG_MAGIC, mqtt_config_notify,
++ "( OLcfgCtAt:5.5 NAME 'olcMqttNotifyPassword' "
++ "DESC 'Notify password change on <topic>, optionally checking that the object is in the specified group.'"
++ "SYNTAX OMsDirectoryString X-ORDERED 'VALUES' )",
++ NULL, NULL },
++ { NULL, NULL, 0, 0, 0, ARG_IGNORED }
++};
++
++static ConfigOCs mqttocs[] = {
++ { "( OLcfgCtOc:5.1 "
++ "NAME 'olcMqttConfig' "
++ "DESC 'MQTT configuration' "
++ "SUP olcOverlayConfig "
++ "MAY ( "
++ "olcMqttHostname "
++ "$ olcMqttPort"
++ "$ olcMqttUsername"
++ "$ olcMqttPassword"
++ "$ olcMqttNotifyPassword"
++ " ) )",
++ Cft_Overlay, mqttcfg },
++
++ { NULL, 0, NULL }
++};
++
++static int mqtt_init(BackendInfo *bi)
++{
++ return mosquitto_lib_init();
++}
++
++static int mqtt_destroy(BackendInfo *bi)
++{
++ return mosquitto_lib_cleanup();
++}
++
++static const char *ca_arg(ConfigArgs *c, int n)
++{
++ return (c->argc <= n) ? NULL : c->argv[n];
++}
++
++static void free_notify(mqtt_notify_t *n)
++{
++ ch_free(n->topic);
++ ch_free(n->oc_group_str);
++ ch_free(n->str_member);
++ ch_free(n->dn_group_str);
++ if (!BER_BVISNULL(&n->ndn_group))
++ ber_memfree(n->ndn_group.bv_val);
++ ch_free(n);
++}
++
++static void free_all_notifies(mqtt_t *mqtt)
++{
++ mqtt_notify_t *n, *next;
++
++ for (n = mqtt->notify_map; n; n = next) {
++ next = n->next;
++ free_notify(n);
++ }
++ mqtt->notify_map = NULL;
++}
++
++static int mqtt_config_notify(ConfigArgs *c)
++{
++ slap_overinst *on = (slap_overinst *)c->bi;
++ mqtt_t *mqtt = (mqtt_t *) on->on_bi.bi_private;
++ mqtt_notify_t *n, **pprev;
++ const char *text = NULL;
++ struct berval bv = BER_BVNULL, ndn = BER_BVNULL;
++ int rc, i;
++
++ switch (c->op) {
++ case SLAP_CONFIG_EMIT:
++ for (i = 0, n = mqtt->notify_map; n; n = n->next, i++) {
++ char *ptr = c->cr_msg, *end = &c->cr_msg[sizeof(c->cr_msg)-1];
++
++ ptr += snprintf(ptr, end-ptr, SLAP_X_ORDERED_FMT "%s", i, n->topic);
++ if (n->dn_group_str)
++ ptr += snprintf(ptr, end-ptr, " \"%s\"", n->dn_group_str);
++ if (n->oc_group_str)
++ ptr += snprintf(ptr, end-ptr, " \"%s\"", n->oc_group_str);
++ if (n->str_member)
++ ptr += snprintf(ptr, end-ptr, " \"%s\"", n->str_member);
++
++ bv.bv_val = c->cr_msg;
++ bv.bv_len = ptr - bv.bv_val;
++ value_add_one(&c->rvalue_vals, &bv);
++ }
++ return 0;
++ case LDAP_MOD_DELETE:
++ if (c->valx < 0) {
++ free_all_notifies(mqtt);
++ } else {
++ pprev = &mqtt->notify_map;
++ n = mqtt->notify_map;
++ for (i = 0; i < c->valx; i++) {
++ pprev = &n->next;
++ n = n->next;
++ }
++ *pprev = n->next;
++ free_notify(n);
++ }
++ return 0;
++ }
++
++ const char *groupdn = ca_arg(c, 2);
++ const char *oc_name = ca_arg(c, 3);
++ const char *ad_name = ca_arg(c, 4);
++ ObjectClass *oc = NULL;
++ AttributeDescription *ad = NULL;
++
++ if (groupdn) {
++ oc = oc_find(oc_name ?: SLAPD_GROUP_CLASS);
++ if (oc == NULL) {
++ Debug(LDAP_DEBUG_ANY, "mqtt_db_open: unable to find objectClass=\"%s\"\n",
++ oc_name, 0, 0);
++ return 1;
++ }
++
++ rc = slap_str2ad(ad_name ?: SLAPD_GROUP_ATTR, &ad, &text);
++ if (rc != LDAP_SUCCESS) {
++ Debug(LDAP_DEBUG_ANY, "mqtt_db_config_notify: unable to find attribute=\"%s\": %s (%d)\n",
++ ad_name, text, rc);
++ return rc;
++ }
++
++ ber_str2bv(groupdn, 0, 0, &bv);
++ rc = dnNormalize(0, NULL, NULL, &bv, &ndn, NULL);
++ if (rc != LDAP_SUCCESS) {
++ Debug(LDAP_DEBUG_ANY, "mqtt_db_config_notify: DN normalization failed for \"%s\": %d\n",
++ groupdn, rc, 0);
++ return rc;
++ }
++ }
++
++ n = ch_calloc(1, sizeof(*n));
++ n->topic = ch_strdup(c->argv[1]);
++ n->dn_group_str = groupdn ? ch_strdup(groupdn) : NULL;
++ n->oc_group_str = oc_name ? ch_strdup(oc_name) : NULL;
++ n->str_member = ad_name ? ch_strdup(ad_name) : NULL;
++ n->ndn_group = ndn;
++ n->oc_group = oc;
++ n->ad_member = ad;
++
++ for (pprev = &mqtt->notify_map; *pprev; pprev = &(*pprev)->next);
++ *pprev = n;
++
++ return 0;
++}
++
++static void mqtt_send_notify(mqtt_t *mqtt, mqtt_notify_t *n)
++{
++ Debug(LDAP_DEBUG_TRACE, "mqtt_send_notify: pub on topic '%s'\n", n->topic, 0, 0);
++ n->notify_pending = mosquitto_publish(mqtt->mq, NULL, n->topic, 0, NULL, 1, true) == MOSQ_ERR_NO_CONN;
++}
++
++static void mqtt_on_connect(struct mosquitto *mq, void *obj, int rc)
++{
++ slap_overinst *on = (slap_overinst *) obj;
++ mqtt_t *mqtt = (mqtt_t *) on->on_bi.bi_private;
++ mqtt_notify_t *n;
++
++ Debug(LDAP_DEBUG_TRACE, "mqtt_on_connect: connected with status %d\n", rc, 0, 0);
++ if (rc != 0)
++ return;
++
++ for (n = mqtt->notify_map; n; n = n->next)
++ if (n->notify_pending)
++ mqtt_send_notify(mqtt, n);
++}
++
++static int mqtt_db_init(BackendDB *be, ConfigReply *cr)
++{
++ slap_overinst *on = (slap_overinst *) be->bd_info;
++
++ Debug(LDAP_DEBUG_TRACE, "mqtt_db_init: initialize overlay\n", 0, 0, 0);
++ on->on_bi.bi_private = ch_calloc(1, sizeof(mqtt_t));
++
++ return 0;
++}
++
++static int mqtt_db_destroy(BackendDB *be, ConfigReply *cr)
++{
++ slap_overinst *on = (slap_overinst *) be->bd_info;
++ mqtt_t *mqtt = on->on_bi.bi_private;
++
++ Debug(LDAP_DEBUG_TRACE, "mqtt_db_destroy: destroy overlay\n", 0, 0, 0);
++ free_all_notifies(mqtt);
++ ch_free(mqtt);
++
++ return 0;
++}
++
++static int mqtt_db_open(BackendDB *be, ConfigReply *cr)
++{
++ slap_overinst *on = (slap_overinst *) be->bd_info;
++ mqtt_t *mqtt = (mqtt_t *) on->on_bi.bi_private;
++ struct mosquitto *mq;
++ char id[256];
++ int n;
++
++ n = snprintf(id, sizeof(id), "openldap-mqtt/%d/", getpid());
++ gethostname(&id[n], sizeof(id) - n);
++
++ Debug(LDAP_DEBUG_TRACE, "mqtt_db_open, id='%s'\n", id, 0, 0);
++ mqtt->mq = mq = mosquitto_new(id, true, on);
++ if (!mq) return 1;
++
++ if (mqtt->username && mqtt->password)
++ mosquitto_username_pw_set(mq, mqtt->username, mqtt->password);
++
++ mosquitto_connect_callback_set(mq, mqtt_on_connect);
++ mosquitto_connect_async(mq, mqtt->hostname ?: "127.0.0.1", mqtt->port ?: 1883, 60);
++ mosquitto_loop_start(mq);
++
++ return 0;
++}
++
++static int mqtt_db_close(BackendDB *be, ConfigReply *cr)
++{
++ slap_overinst *on = (slap_overinst *) be->bd_info;
++ mqtt_t *mqtt = (mqtt_t *) on->on_bi.bi_private;
++
++ Debug(LDAP_DEBUG_TRACE, "mqtt_db_close\n", 0, 0, 0);
++ mosquitto_disconnect(mqtt->mq);
++ mosquitto_loop_stop(mqtt->mq, false);
++ mosquitto_destroy(mqtt->mq);
++
++ free(mqtt->hostname); mqtt->hostname = NULL;
++ free(mqtt->username); mqtt->username = NULL;
++ free(mqtt->password); mqtt->password = NULL;
++
++ return 0;
++}
++
++static int mqtt_response(Operation *op, SlapReply *rs)
++{
++ slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
++ mqtt_t *mqtt = (mqtt_t *) on->on_bi.bi_private;
++ Attribute *a;
++ Modifications *m;
++ bool change = false;
++
++ switch (op->o_tag) {
++ case LDAP_REQ_ADD:
++ for (a = op->ora_e->e_attrs; a; a = a->a_next) {
++ if (a->a_desc == slap_schema.si_ad_userPassword) {
++ change = true;
++ break;
++ }
++ }
++ break;
++ case LDAP_REQ_MODIFY:
++ for (m = op->orm_modlist; m; m = m->sml_next) {
++ if (m->sml_desc == slap_schema.si_ad_userPassword) {
++ change = true;
++ break;
++ }
++ }
++ break;
++ case LDAP_REQ_EXTENDED:
++ if (ber_bvcmp(&slap_EXOP_MODIFY_PASSWD, &op->ore_reqoid) == 0)
++ change = true;
++ break;
++ }
++
++ if (change) {
++ mqtt_notify_t *n;
++ int r, cache;
++
++ for (n = mqtt->notify_map; n; n = n->next) {
++ if (n->oc_group) {
++ cache = op->o_do_not_cache;
++ op->o_do_not_cache = 1;
++ r = backend_group(op, NULL, &n->ndn_group, &op->o_req_ndn, n->oc_group, n->ad_member);
++ op->o_do_not_cache = cache;
++ } else {
++ r = 0;
++ }
++
++ Debug(LDAP_DEBUG_TRACE, "tested o_req_ndn='%s' in ndn_group='%s' r=%d\n",
++ op->o_req_ndn.bv_val, n->ndn_group.bv_val, r);
++
++ if (r == 0)
++ mqtt_send_notify(mqtt, n);
++ }
++ }
++
++ return SLAP_CB_CONTINUE;
++}
++
++static int mqtt_init_overlay()
++{
++ static slap_overinst ov;
++ int rc;
++
++ ov.on_bi.bi_type = "mqtt";
++ ov.on_bi.bi_init = mqtt_init;
++ ov.on_bi.bi_destroy = mqtt_destroy;
++ ov.on_bi.bi_db_init = mqtt_db_init;
++ ov.on_bi.bi_db_destroy = mqtt_db_destroy;
++ ov.on_bi.bi_db_open = mqtt_db_open;
++ ov.on_bi.bi_db_close = mqtt_db_close;
++ ov.on_bi.bi_cf_ocs = mqttocs;
++ ov.on_response = mqtt_response;
++
++ rc = config_register_schema(mqttcfg, mqttocs);
++ if (rc) return rc;
++
++ return overlay_register(&ov);
++}
++
++int init_module(int argc, char *argv[])
++{
++ return mqtt_init_overlay();
++}
+