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authorDimitri Staessens <dimitri.staessens@intec.ugent.be>2016-02-27 11:22:14 +0100
committerDimitri Staessens <dimitri.staessens@intec.ugent.be>2016-02-27 11:22:14 +0100
commit4bfc45d1bc97b3df8212e3fcf7f10cbb660a8259 (patch)
tree81d62a04883a6aa077a411a211328da832b14d52 /src/ipcpd/pci.c
parentf1c57bfaef45b20640aa171e5982f60e629b44b5 (diff)
parentc5413eb544851530eb0436d3e04df54c603b7d12 (diff)
downloadouroboros-4bfc45d1bc97b3df8212e3fcf7f10cbb660a8259.tar.gz
ouroboros-4bfc45d1bc97b3df8212e3fcf7f10cbb660a8259.zip
Merged in dstaesse/ouroboros/be-pci (pull request #12)
PCI structure for IPCP
Diffstat (limited to 'src/ipcpd/pci.c')
-rw-r--r--src/ipcpd/pci.c142
1 files changed, 142 insertions, 0 deletions
diff --git a/src/ipcpd/pci.c b/src/ipcpd/pci.c
new file mode 100644
index 00000000..19c42e53
--- /dev/null
+++ b/src/ipcpd/pci.c
@@ -0,0 +1,142 @@
+/*
+ * 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.
+ */
+
+#include "pci.h"
+#include <malloc.h>
+#include <errno.h>
+
+#define PCI_HEAD_SIZE(a, b) a.addr_size * 2 + \
+ a.cep_id_size * 2 + \
+ a.pdu_length_size + \
+ b.ttl_size + \
+ a.seqno_size + \
+ a.qos_id_size
+#define PCI_TAIL_SIZE(b) b.chk_size
+
+
+struct pci {
+ /* head */
+ uint8_t * dst_addr;
+ uint8_t * src_addr;
+ uint8_t * dst_cep_id;
+ uint8_t * src_cep_id;
+ uint8_t * pdu_length;
+ uint8_t * ttl;
+ uint8_t * seqno;
+ uint8_t * qos_id;
+
+ uint8_t * chk;
+
+ du_buff_t * dub;
+
+ struct ipcp_dtp_const dtpc;
+ struct ipcp_dup_const dupc;
+
+};
+
+pci_t * pci_create(du_buff_t * dub,
+ const struct ipcp_dtp_const * dtpc,
+ const struct ipcp_dup_const * dupc)
+{
+ struct pci * p;
+
+ if (dub == NULL) {
+ LOG_DBGF("Bogus input. Bugging out.");
+ return NULL;
+ }
+
+ p = malloc(sizeof *p);
+
+ if (p == NULL)
+ return NULL;
+
+ p->dub = dub;
+
+ p->dtpc = *dtpc;
+ p->dupc = *dupc;
+
+ p->dst_addr = NULL;
+ p->src_addr = NULL;
+ p->dst_cep_id = NULL;
+ p->src_cep_id = NULL;
+ p->pdu_length = NULL;
+ p->ttl = NULL;
+ p->seqno = NULL;
+ p->qos_id = NULL;
+ p->chk = NULL;
+
+ return p;
+}
+
+void pci_destroy(pci_t * pci)
+{
+ free(pci);
+}
+
+int pci_init(pci_t * pci)
+{
+ if (pci == NULL) {
+ LOG_DBGF("Bogus input. Bugging out.");
+ return -EINVAL;
+ }
+
+ uint8_t * pci_head = du_buff_head_alloc(pci->dub, PCI_HEAD_SIZE(
+ pci->dtpc,pci->dupc));
+ uint8_t * pci_tail = du_buff_tail_alloc(pci->dub, PCI_TAIL_SIZE(
+ pci->dupc));
+
+ if (pci_head == NULL) {
+ LOG_DBG("Failed to allocate space for PCI at head.");
+ return -ENOBUFS;
+ }
+
+ if (pci_tail == NULL) {
+ LOG_DBG("Failed to allocate space for PCI at tail.");
+ return -ENOBUFS;
+ }
+
+ pci->dst_addr = pci_head;
+ pci->src_addr = (pci_head += pci->dtpc.addr_size);
+ pci->dst_cep_id = (pci_head += pci->dtpc.addr_size);
+ pci->src_cep_id = (pci_head += pci->dtpc.cep_id_size);
+ pci->pdu_length = (pci_head += pci->dtpc.cep_id_size);
+ pci->ttl = (pci_head += pci->dtpc.pdu_length_size);
+ pci->seqno = (pci_head += pci->dupc.ttl_size);
+ pci->qos_id = (pci_head += pci->dtpc.seqno_size);
+
+ pci->chk = (pci_tail);
+
+ return 0;
+}
+
+void pci_release(pci_t * pci)
+{
+ if (pci == NULL)
+ return;
+
+ if (pci->dub == NULL)
+ return;
+
+ du_buff_head_release(pci->dub, PCI_HEAD_SIZE(pci->dtpc, pci->dupc));
+ du_buff_tail_release(pci->dub, PCI_TAIL_SIZE(pci->dupc));
+}