Create skeleton CLDAP server as a DS plugin

1 files changed, 238 insertions, 0 deletions

diff --git a/daemons/ipa-slapi-plugins/ipa-cldap/ipa_cldap.c b/daemons/ipa-slapi-plugins/ipa-cldap/ipa_cldap.c
new file mode 100644
index 00000000..d7a59d51
--- /dev/null
+++ b/daemons/ipa-slapi-plugins/ipa-cldap/ipa_cldap.c
@@ -0,0 +1,238 @@
+/** BEGIN COPYRIGHT BLOCK
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Additional permission under GPLv3 section 7:
+ *
+ * In the following paragraph, "GPL" means the GNU General Public
+ * License, version 3 or any later version, and "Non-GPL Code" means
+ * code that is governed neither by the GPL nor a license
+ * compatible with the GPL.
+ *
+ * You may link the code of this Program with Non-GPL Code and convey
+ * linked combinations including the two, provided that such Non-GPL
+ * Code only links to the code of this Program through those well
+ * defined interfaces identified in the file named EXCEPTION found in
+ * the source code files (the "Approved Interfaces"). The files of
+ * Non-GPL Code may instantiate templates or use macros or inline
+ * functions from the Approved Interfaces without causing the resulting
+ * work to be covered by the GPL. Only the copyright holders of this
+ * Program may make changes or additions to the list of Approved
+ * Interfaces.
+ *
+ * Authors:
+ * Simo Sorce <ssorce@redhat.com>
+ *
+ * Copyright (C) 2011 Red Hat, Inc.
+ * All rights reserved.
+ * END COPYRIGHT BLOCK **/
+
+#include "ipa_cldap.h"
+#include "util.h"
+
+Slapi_PluginDesc ipa_cldap_desc = {
+    IPA_CLDAP_PLUGIN_NAME,
+    "FreeIPA project",
+    "FreeIPA/3.0",
+    IPA_CLDAP_PLUGIN_DESC
+};
+
+static int ipa_cldap_start(Slapi_PBlock *pb)
+{
+    struct ipa_cldap_ctx *ctx;
+    int ret;
+
+    ret = slapi_pblock_get(pb, SLAPI_PLUGIN_PRIVATE, &ctx);
+    if (ret) {
+        LOG_FATAL("No plugin context ?!\n");
+        return -1;
+    }
+
+    ret = pthread_create(&ctx->tid, NULL, ipa_cldap_worker, ctx);
+    if (ret) {
+        LOG_FATAL("Failed to create worker thread\n");
+        return -1;
+    }
+
+    LOG("Plugin statrup completed.\n");
+
+    return 0;
+}
+
+static int ipa_cldap_stop(Slapi_PBlock *pb)
+{
+    struct ipa_cldap_ctx *ctx;
+    void *retval;
+    int ret;
+
+    ret = slapi_pblock_get(pb, SLAPI_PLUGIN_PRIVATE, &ctx);
+    if (ret) {
+        LOG_FATAL("No plugin context ?!\n");
+        return -1;
+    }
+
+    /* send stop signal to terminate worker thread */
+    write(ctx->stopfd[1], "", 1);
+    close(ctx->stopfd[1]);
+
+    ret = pthread_join(ctx->tid, &retval);
+    if (ret) {
+        LOG_FATAL("Failed to stop worker thread\n");
+        return -1;
+    }
+
+    LOG("Plugin shutdown completed.\n");
+
+    return 0;
+}
+
+static int ipa_cldap_init_service(Slapi_PBlock *pb,
+                                  struct ipa_cldap_ctx **cldap_ctx)
+{
+    struct ipa_cldap_ctx *ctx;
+    struct sockaddr_in6 addr;
+    Slapi_Entry *e;
+    int flags;
+    int val;
+    int ret;
+
+    ctx = calloc(1, sizeof(struct ipa_cldap_ctx));
+    if (!ctx) {
+        return ENOMEM;
+    }
+    ctx->sd = -1;
+
+    ret = slapi_pblock_get(pb, SLAPI_PLUGIN_IDENTITY, &ctx->plugin_id);
+    if ((ret != 0) || (NULL == ctx->plugin_id)) {
+        LOG_FATAL("Could not get identity or identity was NULL\n");
+        if (ret == 0) {
+            ret = -1;
+        }
+        goto done;
+    }
+
+    slapi_pblock_get(pb, SLAPI_PLUGIN_CONFIG_ENTRY, &e);
+    if (!e) {
+        LOG_FATAL("Plugin configuration not found!\n");
+        return -1;
+    }
+
+    ctx->base_dn = slapi_entry_attr_get_charptr(e, "nsslapd-basedn");
+    if (!ctx->base_dn) {
+        LOG_FATAL("Plugin configuration not found!\n");
+        return -1;
+    }
+
+    /* create a stop pipe so the main DS thread can interrupt the poll()
+     * of the worker thread at any time and cause the worker thread to
+     * immediately exit without waiting for timeouts or such */
+    ret = pipe(ctx->stopfd);
+    if (ret != 0) {
+        LOG_FATAL("Failed to stop pipe\n");
+        ret = EIO;
+        goto done;
+    }
+
+    ctx->sd = socket(PF_INET6, SOCK_DGRAM, 0);
+    if (ctx->sd == -1) {
+        LOG_FATAL("Failed to create socket\n");
+        ret = EIO;
+        goto done;
+    }
+
+    val = 1;
+    ret = setsockopt(ctx->sd, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val));
+    if (ret == -1) {
+        ret = errno;
+        LOG("Failed to make socket immediately reusable (%d, %s)\n",
+            ret, strerror(ret));
+    }
+
+    memset(&addr, 0, sizeof(addr));
+    addr.sin6_family = AF_INET6;
+    addr.sin6_port = htons(CLDAP_PORT);
+
+    ret = bind(ctx->sd, (struct sockaddr *)&addr, sizeof(addr));
+    if (ret == -1) {
+        ret = errno;
+        LOG_FATAL("Failed to bind socket (%d, %s)\n", ret, strerror(ret));
+        goto done;
+    }
+
+    flags = fcntl(ctx->sd, F_GETFL);
+    if ((flags & O_NONBLOCK) == 0) {
+        ret = fcntl(ctx->sd, F_SETFL, flags | O_NONBLOCK);
+        if (ret == -1) {
+            ret = errno;
+            LOG_FATAL("Failed to set socket to non-blocking\n");
+            goto done;
+        }
+    }
+
+done:
+    if (ret) {
+        if (ctx->sd != -1) {
+            close(ctx->sd);
+        }
+        free(ctx);
+    } else {
+        *cldap_ctx = ctx;
+    }
+    return ret;
+}
+
+static int ipa_cldap_post_init(Slapi_PBlock *pb)
+{
+    return 0;
+}
+
+/* Initialization function */
+int ipa_cldap_init(Slapi_PBlock *pb)
+{
+    struct ipa_cldap_ctx *cldap_ctx = NULL;
+    int ret;
+
+    ret = ipa_cldap_init_service(pb, &cldap_ctx);
+    if (ret) {
+        LOG_FATAL("Failed to initialize CLDAP Plugin\n");
+        /* do not cause DS to stop, simply do nothing */
+        return 0;
+    }
+
+    /* Register the plug-in */
+    ret = slapi_pblock_set(pb, SLAPI_PLUGIN_VERSION, SLAPI_PLUGIN_VERSION_03);
+    if (!ret) {
+        ret = slapi_pblock_set(pb, SLAPI_PLUGIN_DESCRIPTION, &ipa_cldap_desc);
+    }
+    if (!ret) {
+        ret = slapi_pblock_set(pb, SLAPI_PLUGIN_START_FN, &ipa_cldap_start);
+    }
+    if (!ret) {
+        ret = slapi_pblock_set(pb, SLAPI_PLUGIN_CLOSE_FN, &ipa_cldap_stop);
+    }
+    if (!ret) {
+        ret = slapi_pblock_set(pb, SLAPI_PLUGIN_PRIVATE, cldap_ctx);
+    }
+    if (ret) {
+        LOG_FATAL("Failed to initialize plug-in\n" );
+        return -1;
+    }
+
+    slapi_register_plugin("postoperation", 1,
+                          "ipa_cldap_post_init",
+                          ipa_cldap_post_init,
+                          "CLDAP post ops", NULL,
+                          cldap_ctx->plugin_id);
+
+    return 0;
+}