Merged in dstaesse/ouroboros/be-wip (pull request #362)

ipcpd, lib: Revise normal IPCP

1 files changed, 263 insertions, 0 deletions

diff --git a/src/ipcpd/normal/enroll.c b/src/ipcpd/normal/enroll.c
new file mode 100644
index 00000000..695ceb1d
--- /dev/null
+++ b/src/ipcpd/normal/enroll.c
@@ -0,0 +1,263 @@
+/*
+ * Ouroboros - Copyright (C) 2016 - 2017
+ *
+ * Enrollment Task
+ *
+ *    Dimitri Staessens <dimitri.staessens@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 version 2 as
+ * published by the Free Software Foundation.
+ *
+ * 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 "enrollment"
+
+#include <ouroboros/config.h>
+#include <ouroboros/cdap.h>
+#include <ouroboros/dev.h>
+#include <ouroboros/logs.h>
+#include <ouroboros/rib.h>
+
+#include "ae.h"
+
+#include <assert.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define DLR          "/"
+#define DIF_PATH     DLR DIF_NAME
+#define BOOT_PATH    DLR BOOT_NAME
+#define MEMBERS_PATH DLR MEMBERS_NAME
+
+int enroll_handle(int fd)
+{
+        struct cdap *    ci;
+        cdap_key_t       key;
+        enum cdap_opcode oc;
+        char *           name;
+        uint8_t *        buf;
+        uint8_t *        data;
+        ssize_t          len;
+        uint32_t         flags;
+
+        bool boot_r     = false;
+        bool members_r  = false;
+        bool dif_name_r = false;
+
+        char * boot_ro    = BOOT_PATH;
+        char * members_ro = MEMBERS_PATH;
+        char * dif_ro     = DIF_PATH;
+
+        if (flow_alloc_resp(fd, 0) < 0) {
+                flow_dealloc(fd);
+                LOG_ERR("Could not respond to request.");
+                return -1;
+        }
+
+        ci = cdap_create(fd);
+        if (ci == NULL) {
+                flow_dealloc(fd);
+                LOG_ERR("Failed to create CDAP instance.");
+                return -1;
+        }
+
+        while (!(boot_r && members_r && dif_name_r)) {
+                key = cdap_request_wait(ci, &oc, &name, &data,
+                                        (size_t *) &len , &flags);
+
+                assert(key >= 0);
+                assert(name);
+
+                if (data != NULL) {
+                        free(data);
+                        LOG_WARN("Received data with enrollment request.");
+                }
+
+                if (oc != CDAP_READ) {
+                        LOG_WARN("Invalid request.");
+                        cdap_reply_send(ci, key, -1, NULL, 0);
+                        cdap_destroy(ci);
+                        flow_dealloc(fd);
+                        free(name);
+                        return -1;
+                }
+
+                if (strcmp(name, boot_ro) == 0) {
+                        boot_r = true;
+                } else if (strcmp(name, members_ro) == 0) {
+                        members_r = true;
+                } else if (strcmp(name, dif_ro) == 0) {
+                        dif_name_r = true;
+                } else {
+                        LOG_WARN("Illegal read: %s.", name);
+                        cdap_reply_send(ci, key, -1, NULL, 0);
+                        cdap_destroy(ci);
+                        flow_dealloc(fd);
+                        free(name);
+                        return -1;
+                }
+
+                len = rib_pack(name, &buf, PACK_HASH_ROOT);
+                if (len < 0) {
+                        LOG_ERR("Failed to pack %s.", name);
+                        cdap_reply_send(ci, key, -1, NULL, 0);
+                        cdap_destroy(ci);
+                        flow_dealloc(fd);
+                        free(name);
+                        return -1;
+                }
+
+                LOG_DBG("Packed %s (%lu bytes).", name, len);
+
+                free(name);
+
+                if (cdap_reply_send(ci, key, 0, buf, len)) {
+                        LOG_ERR("Failed to send CDAP reply.");
+                        cdap_destroy(ci);
+                        flow_dealloc(fd);
+                        return -1;
+                }
+
+                free(buf);
+        }
+
+        LOG_DBG("Sent boot info to new member.");
+
+        cdap_destroy(ci);
+
+        flow_dealloc(fd);
+
+        return 0;
+}
+
+int enroll_boot(char * dst_name)
+{
+        struct cdap * ci;
+        cdap_key_t    key;
+        uint8_t *     data;
+        size_t        len;
+        int           fd;
+
+        char * boot_ro    = BOOT_PATH;
+        char * members_ro = MEMBERS_PATH;
+        char * dif_ro     = DIF_PATH;
+
+        fd = flow_alloc(dst_name, ENROLL_AE, NULL);
+        if (fd < 0) {
+                LOG_ERR("Failed to allocate flow.");
+                return -1;
+        }
+
+        if (flow_alloc_res(fd)) {
+                LOG_ERR("Flow allocation failed.");
+                flow_dealloc(fd);
+                return -1;
+        }
+
+        ci = cdap_create(fd);
+        if (ci == NULL) {
+                LOG_ERR("Failed to create CDAP instance.");
+                flow_dealloc(fd);
+                return -1;
+        }
+
+        LOG_DBG("Getting boot information from %s.", dst_name);
+
+        key = cdap_request_send(ci, CDAP_READ, boot_ro, NULL, 0, 0);
+        if (key < 0) {
+                LOG_ERR("Failed to send CDAP request.");
+                cdap_destroy(ci);
+                flow_dealloc(fd);
+                return -1;
+        }
+
+        if (cdap_reply_wait(ci, key, &data, &len)) {
+                LOG_ERR("Failed to get CDAP reply.");
+                cdap_destroy(ci);
+                flow_dealloc(fd);
+                return -1;
+        }
+
+        LOG_DBG("Packed information received (%lu bytes).", len);
+
+        if (rib_unpack(data, len, UNPACK_CREATE)) {
+                LOG_WARN("Error unpacking RIB data.");
+                rib_del(boot_ro);
+                free(data);
+                cdap_destroy(ci);
+                flow_dealloc(fd);
+                return -1;
+        }
+
+        LOG_DBG("Packed information inserted into RIB.");
+
+        key = cdap_request_send(ci, CDAP_READ, members_ro, NULL, 0, 0);
+        if (key < 0) {
+                LOG_ERR("Failed to send CDAP request.");
+                cdap_destroy(ci);
+                flow_dealloc(fd);
+                return -1;
+        }
+
+        if (cdap_reply_wait(ci, key, &data, &len)) {
+                LOG_ERR("Failed to get CDAP reply.");
+                cdap_destroy(ci);
+                flow_dealloc(fd);
+                return -1;
+        }
+
+        LOG_DBG("Packed information received (%lu bytes).", len);
+
+        if (rib_unpack(data, len, UNPACK_CREATE)) {
+                LOG_WARN("Error unpacking RIB data.");
+                rib_del(boot_ro);
+                free(data);
+                cdap_destroy(ci);
+                flow_dealloc(fd);
+                return -1;
+        }
+
+        LOG_DBG("Packed information inserted into RIB.");
+
+        key = cdap_request_send(ci, CDAP_READ, dif_ro, NULL, 0, 0);
+        if (key < 0) {
+                LOG_ERR("Failed to send CDAP request.");
+                cdap_destroy(ci);
+                flow_dealloc(fd);
+                return -1;
+        }
+
+        if (cdap_reply_wait(ci, key, &data, &len)) {
+                LOG_ERR("Failed to get CDAP reply.");
+                cdap_destroy(ci);
+                flow_dealloc(fd);
+                return -1;
+        }
+
+        LOG_DBG("Packed information received (%lu bytes).", len);
+
+        if (rib_unpack(data, len, UNPACK_CREATE)) {
+                LOG_WARN("Error unpacking RIB data.");
+                rib_del(boot_ro);
+                free(data);
+                cdap_destroy(ci);
+                flow_dealloc(fd);
+                return -1;
+        }
+
+        LOG_DBG("Packed information inserted into RIB.");
+
+        cdap_destroy(ci);
+
+        flow_dealloc(fd);
+
+        return 0;
+}