ipcpd: normal: Provide directory for registered names

This adds a directory to the normal IPCP that maps names on IPCP
addresses.

1 files changed, 215 insertions, 0 deletions

diff --git a/src/ipcpd/normal/dir.c b/src/ipcpd/normal/dir.c
new file mode 100644
index 00000000..2b3742d9
--- /dev/null
+++ b/src/ipcpd/normal/dir.c
@@ -0,0 +1,215 @@
+/*
+ * Ouroboros - Copyright (C) 2016
+ *
+ * DIF directory
+ *
+ *    Sander Vrijders <sander.vrijders@intec.ugent.be>
+ *
+ * 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 2 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, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#define OUROBOROS_PREFIX "directory"
+
+#include <ouroboros/config.h>
+#include <ouroboros/logs.h>
+#include <ouroboros/errno.h>
+
+#include "dir.h"
+#include "ipcp.h"
+#include "ro.h"
+#include "path.h"
+#include "ribmgr.h"
+
+#include <stdlib.h>
+#include <string.h>
+
+char * create_path(char * name)
+{
+        char * path;
+
+        path = pathname_create(RO_DIR);
+        if (path == NULL)
+                return NULL;
+
+        path = pathname_append(path, name);
+        if (path == NULL) {
+                pathname_destroy(path);
+                return NULL;
+        }
+
+        return path;
+}
+
+int dir_init(void)
+{
+        char * path;
+        struct ro_attr attr;
+
+        ro_attr_init(&attr);
+        attr.enrol_sync = true;
+        attr.recv_set = ALL_MEMBERS;
+
+        path = pathname_create(RO_DIR);
+        if (path == NULL)
+                return -1;
+
+        if (ro_create(path, &attr, NULL, 0)) {
+                pathname_destroy(path);
+                LOG_ERR("Failed to create RIB object.");
+                return -1;
+        }
+
+        pathname_destroy(path);
+
+        return 0;
+}
+
+int dir_fini(void)
+{
+        char * path;
+
+        path = pathname_create(RO_DIR);
+        if (path == NULL)
+                return -1;
+
+        ro_delete(path);
+        pathname_destroy(path);
+
+        return 0;
+}
+
+int dir_name_reg(char * name)
+{
+        struct ro_attr attr;
+        char * path;
+        uint64_t * addr;
+
+        pthread_rwlock_rdlock(&ipcpi.state_lock);
+
+        if (ipcp_get_state() != IPCP_RUNNING) {
+                pthread_rwlock_unlock(&ipcpi.state_lock);
+                LOG_ERR("IPCP is not in RUNNING state.");
+                return -1;
+        }
+
+        ro_attr_init(&attr);
+        attr.enrol_sync = true;
+        attr.recv_set = ALL_MEMBERS;
+
+        path = create_path(name);
+        if (path == NULL) {
+                pthread_rwlock_unlock(&ipcpi.state_lock);
+                return -ENOMEM;
+        }
+
+        addr = malloc(sizeof(*addr));
+        if (addr == NULL) {
+                pthread_rwlock_unlock(&ipcpi.state_lock);
+                pathname_destroy(path);
+                return -ENOMEM;
+        }
+        *addr = ribmgr_address();
+
+        if (ro_create(path, &attr, (uint8_t *) addr, sizeof(*addr))) {
+                pthread_rwlock_unlock(&ipcpi.state_lock);
+                pathname_destroy(path);
+                LOG_ERR("Failed to create RIB object.");
+                return -1;
+        }
+
+        pthread_rwlock_unlock(&ipcpi.state_lock);
+
+        LOG_DBG("Registered %s.", name);
+        pathname_destroy(path);
+
+        return 0;
+}
+
+int dir_name_unreg(char * name)
+{
+        char * path;
+
+        pthread_rwlock_rdlock(&ipcpi.state_lock);
+
+        if (ipcp_get_state() != IPCP_RUNNING) {
+                pthread_rwlock_unlock(&ipcpi.state_lock);
+                LOG_ERR("IPCP is not in RUNNING state.");
+                return -1;
+        }
+
+        path = create_path(name);
+        if (path == NULL) {
+                pthread_rwlock_unlock(&ipcpi.state_lock);
+                return -ENOMEM;
+        }
+
+        if (ro_delete(path)) {
+                pthread_rwlock_unlock(&ipcpi.state_lock);
+                pathname_destroy(path);
+                LOG_ERR("No such RIB object exists.");
+                return -1;
+        }
+
+        pthread_rwlock_unlock(&ipcpi.state_lock);
+
+        pathname_destroy(path);
+
+        return 0;
+}
+
+int dir_name_query(char * name)
+{
+        char * path;
+        int ret = -1;
+        uint8_t * ro_data;
+        uint64_t addr;
+        struct dt_const * dtc;
+
+        pthread_rwlock_rdlock(&ipcpi.state_lock);
+
+        if (ipcp_get_state() != IPCP_RUNNING) {
+                pthread_rwlock_unlock(&ipcpi.state_lock);
+                return -1;
+        }
+
+        path = create_path(name);
+        if (path == NULL) {
+                pthread_rwlock_unlock(&ipcpi.state_lock);
+                return -1;
+        }
+
+        if (ro_exists(path)) {
+                if (ro_read(path, &ro_data) < 0) {
+                        pathname_destroy(path);
+                        return -1;
+                }
+                addr = *((uint64_t *) ro_data);
+                free(ro_data);
+
+                dtc = ribmgr_dt_const();
+                if (dtc == NULL) {
+                        pathname_destroy(path);
+                        return -1;
+                }
+
+                ret = (addr == ribmgr_address()) ? -1 : 0;
+        }
+
+        pthread_rwlock_unlock(&ipcpi.state_lock);
+
+        pathname_destroy(path);
+
+        return ret;
+}