ipcpd: normal: Split connection establishment

Connection establishment was done at the same time as flow
allocation. This splits it more cleanly, and allows to re-use the DT
AE for other purposes.

1 files changed, 102 insertions, 0 deletions

diff --git a/src/ipcpd/normal/frct_pci.c b/src/ipcpd/normal/frct_pci.c
new file mode 100644
index 00000000..a13df2f4
--- /dev/null
+++ b/src/ipcpd/normal/frct_pci.c
@@ -0,0 +1,102 @@
+/*
+ * Ouroboros - Copyright (C) 2016 - 2017
+ *
+ * Protocol Control Information for FRCT
+ *
+ *    Dimitri Staessens <[email protected]>
+ *    Sander Vrijders   <[email protected]>
+ *
+ * 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.
+ */
+
+#include <ouroboros/config.h>
+#include <ouroboros/errno.h>
+#include <ouroboros/rib.h>
+
+#include "dt_const.h"
+#include "frct_pci.h"
+#include "ribconfig.h"
+
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+
+struct {
+        struct dt_const dtc;
+        size_t          head_size;
+
+        /* offsets */
+        size_t          seqno_o;
+} frct_pci_info;
+
+int frct_pci_init(void)
+{
+        /* read dt constants from the RIB */
+        if (rib_read(BOOT_PATH "/dt/const/cep_id_size",
+                     &frct_pci_info.dtc.cep_id_size,
+                     sizeof(frct_pci_info.dtc.cep_id_size)) < 0 ||
+            rib_read(BOOT_PATH "/dt/const/seqno_size",
+                     &frct_pci_info.dtc.seqno_size,
+                     sizeof(frct_pci_info.dtc.seqno_size)) < 0)
+                return -1;
+
+        frct_pci_info.seqno_o = frct_pci_info.dtc.cep_id_size;
+
+        frct_pci_info.head_size = frct_pci_info.seqno_o +
+                frct_pci_info.dtc.seqno_size;
+
+        return 0;
+}
+
+void frct_pci_fini(void) {
+        return;
+}
+
+int frct_pci_ser(struct shm_du_buff * sdb,
+                 struct frct_pci *    frct_pci)
+{
+        uint8_t * head;
+
+        assert(sdb);
+        assert(frct_pci);
+
+        head = shm_du_buff_head_alloc(sdb, frct_pci_info.head_size);
+        if (head == NULL)
+                return -EPERM;
+
+        /* FIXME: Add check and operations for Big Endian machines */
+        memcpy(head, &frct_pci->dst_cep_id, frct_pci_info.dtc.cep_id_size);
+        memcpy(head + frct_pci_info.seqno_o, &frct_pci->seqno,
+               frct_pci_info.dtc.seqno_size);
+
+        return 0;
+}
+
+void frct_pci_des(struct shm_du_buff * sdb,
+                  struct frct_pci *    frct_pci)
+{
+        uint8_t * head;
+
+        assert(sdb);
+        assert(frct_pci);
+
+        head = shm_du_buff_head(sdb);
+
+        /* FIXME: Add check and operations for Big Endian machines */
+        memcpy(&frct_pci->dst_cep_id, head, frct_pci_info.dtc.cep_id_size);
+        memcpy(&frct_pci->seqno, head + frct_pci_info.seqno_o,
+               frct_pci_info.dtc.seqno_size);
+
+        shm_du_buff_head_release(sdb, frct_pci_info.head_size);
+}