ipcpd: Allocation of authenticated CDAP flows

Avoids some code duplication in the normal IPCP with respect to
establishing authenticated CDAP flows.

1 files changed, 153 insertions, 0 deletions

diff --git a/src/ipcpd/normal/cdap_flow.c b/src/ipcpd/normal/cdap_flow.c
new file mode 100644
index 00000000..2895af0d
--- /dev/null
+++ b/src/ipcpd/normal/cdap_flow.c
@@ -0,0 +1,153 @@
+/*
+ * Ouroboros - Copyright (C) 2016 - 2017
+ *
+ * Normal IPC Process - Authenticated CDAP Flow Allocator
+ *
+ *    Sander Vrijders   <sander.vrijders@ugent.be>
+ *    Dimitri Staessens <dimitri.staessens@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 "cdap-flow"
+
+#include <ouroboros/config.h>
+#include <ouroboros/dev.h>
+#include <ouroboros/logs.h>
+
+#include "cdap_flow.h"
+
+#include <stdlib.h>
+#include <assert.h>
+
+static void cdap_flow_destroy(struct cdap_flow * flow)
+{
+        assert(flow);
+
+        if (flow->ci != NULL)
+                cdap_destroy(flow->ci);
+
+        if (flow->info != NULL) {
+                if (flow->info->name != NULL)
+                        free(flow->info->name);
+                if (flow->info->data != NULL)
+                        free(flow->info->data);
+        }
+
+        free(flow);
+}
+
+struct cdap_flow * cdap_flow_arr(int                       fd,
+                                 int                       resp,
+                                 enum pol_cacep            pc,
+                                 const struct cacep_info * info)
+{
+        struct cdap_flow *  flow;
+
+        if (flow_alloc_resp(fd, resp) < 0) {
+                log_err("Could not respond to new flow.");
+                return NULL;
+        }
+
+        if (resp)
+                return NULL;
+
+        flow = malloc(sizeof(*flow));
+        if (flow == NULL) {
+                log_err("Failed to malloc.");
+                return NULL;
+        }
+
+        flow->fd = fd;
+        flow->ci = NULL;
+
+        flow->info = cacep_auth_wait(fd, pc, info);
+        if (flow->info == NULL) {
+                log_err("Other side failed to authenticate.");
+                cdap_flow_destroy(flow);
+                return NULL;
+        }
+
+        flow->ci = cdap_create(fd);
+        if (flow->ci == NULL) {
+                log_err("Failed to create CDAP instance.");
+                cdap_flow_destroy(flow);
+                return NULL;
+        }
+
+        return flow;
+}
+
+struct cdap_flow * cdap_flow_alloc(const char *              dst_name,
+                                   const char *              ae_name,
+                                   qosspec_t *               qs,
+                                   enum pol_cacep            pc,
+                                   const struct cacep_info * info)
+{
+        struct cdap_flow *  flow;
+        int                 fd;
+
+        log_dbg("Allocating flow to %s.", dst_name);
+
+        if (dst_name == NULL || ae_name == NULL) {
+                log_err("Not enough info to establish flow.");
+                return NULL;
+        }
+
+        fd = flow_alloc(dst_name, ae_name, qs);
+        if (fd < 0) {
+                log_err("Failed to allocate flow to %s.", dst_name);
+                return NULL;
+        }
+
+        if (flow_alloc_res(fd)) {
+                log_err("Flow allocation to %s failed.", dst_name);
+                return NULL;
+        }
+
+        flow = malloc(sizeof(*flow));
+        if (flow == NULL) {
+                log_err("Failed to malloc.");
+                flow_dealloc(fd);
+                return NULL;
+        }
+
+        flow->fd = fd;
+        flow->ci = NULL;
+
+        flow->info = cacep_auth(fd, pc, info);
+        if (flow->info == NULL) {
+                log_err("Failed to authenticate.");
+                cdap_flow_dealloc(flow);
+                return NULL;
+        }
+
+        flow->ci = cdap_create(fd);
+        if (flow->ci == NULL) {
+                log_err("Failed to create CDAP instance.");
+                cdap_flow_dealloc(flow);
+                return NULL;
+        }
+
+        return flow;
+}
+
+void cdap_flow_dealloc(struct cdap_flow * flow)
+{
+        int fd = flow->fd;
+
+        cdap_flow_destroy(flow);
+
+        flow_dealloc(fd);
+}