ipcps: initial code for pci structure

1 files changed, 98 insertions, 0 deletions

diff --git a/src/ipcpd/pci.c b/src/ipcpd/pci.c
new file mode 100644
index 00000000..1987957a
--- /dev/null
+++ b/src/ipcpd/pci.c
@@ -0,0 +1,98 @@
+/*
+ * Ouroboros - Copyright (C) 2016
+ *
+ * Protocol Control Information
+ *
+ *    Dimitri Staessens <dimitri.staessens@intec.ugent.be>
+ *    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.
+ */
+
+struct pci {
+        uint8_t * src_addr;
+        uint8_t * dst_addr;
+        uint8_t * pdu_length;
+        uint8_t * qos_id;
+        uint8_t * seqnr;
+        uint8_t * pad_h;
+        uint8_t * pad_t;
+
+        uint8_t   head_sz;
+        uint8_t   tail_sz;
+
+};
+
+pci_t * pci_create(struct dtp_const * dtc)
+{
+        int i          = 0;
+
+        if (dtc == NULL)
+                return NULL;
+
+        struct pci * p = malloc(sizeof pci);
+
+        if (p == NULL)
+                return NULL:
+
+        p->src_addr =NULL;
+        p->dst_addr = NULL;
+        p->pdu_length = NULL;
+        p->qos_id = NULL;
+        p->seqnr = NULL;
+        p->pad_h = NULL;
+        p->pad_t = NULL;
+
+        head_sz = 0;
+        tail_sz = 0;
+
+        return p;
+}
+
+/* policy... one could reorder the data fields
+   exercise left to the idiot that cares */
+int * pci_init(pci_t            * pci,
+               d_buff_t         * dub,
+               struct dtp_const * dtc,
+               struct dup_const * dupc)
+{
+        uint8_t * pci_head;
+        uint8_t * pci_tail;
+
+        /* nastiness ahead, all members are uint8_t's */
+        uint8_t * n = (uint8_t *) dtc;
+        for (i=0; i < sizeof *dtc; ++i)
+                n[i] & 0x80 ? tail_sz += n[i] & 0x80:
+                        head_sz += n[i];
+        head_sz += n[0] & 0x80 ? n[0] : 0; /* dst_addr */
+
+        n = (uint8_t *) dupc;
+        for (i=0; i < sizeof *dupc; ++i)
+                n[i] & 0x80 ? tail_sz += n[i] & 0x80 :
+                        head_sz += n[i];
+        tail_sz += n[0] & 0x80 ? n[0] : 0; /* dst_addr */
+
+        /* end of nastiness */
+
+        pci_head = du_buff_head_alloc(dub, head_sz);
+        pci_tail = du_buff_tail_alloc(dub, tail_sz);
+
+        LOG_MISSING();
+}
+
+void pci_destroy(pci_t * pci)
+{
+        free (pci);
+}