From b76dd5abd20f5773709d375ddbf4a1685bf2c8cb Mon Sep 17 00:00:00 2001
From: dimitri staessens <dimitri.staessens@intec.ugent.be>
Date: Fri, 25 Mar 2016 12:00:26 +0100
Subject: ipcpd: added shm_pci_t to manipulate PCI in shm
Provides access to the members of the PCI for shm_du_buffs stored in
the shared memory ringbuffer.
---
src/ipcpd/CMakeLists.txt | 1 +
src/ipcpd/shm_pci.c | 146 +++++++++++++++++++++++++++++++++++++++++++++++
src/ipcpd/shm_pci.h | 43 ++++++++++++++
3 files changed, 190 insertions(+)
create mode 100644 src/ipcpd/shm_pci.c
create mode 100644 src/ipcpd/shm_pci.h
(limited to 'src/ipcpd')
diff --git a/src/ipcpd/CMakeLists.txt b/src/ipcpd/CMakeLists.txt
index df6ba5e1..bcb5b986 100644
--- a/src/ipcpd/CMakeLists.txt
+++ b/src/ipcpd/CMakeLists.txt
@@ -8,6 +8,7 @@ set(SOURCE_FILES
# Add source files here
main.c
pci.c
+ shm_pci.c
)
add_executable (ipcpd ${SOURCE_FILES})
diff --git a/src/ipcpd/shm_pci.c b/src/ipcpd/shm_pci.c
new file mode 100644
index 00000000..d44e0e8f
--- /dev/null
+++ b/src/ipcpd/shm_pci.c
@@ -0,0 +1,146 @@
+/*
+ * Ouroboros - Copyright (C) 2016
+ *
+ * Protocol Control Information in Shared Memory Map
+ *
+ * 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 "shm_pci.h"
+#include <malloc.h>
+#include <errno.h>
+
+#define SHM_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 SHM_PCI_TAIL_SIZE(b) b.chk_size
+
+#define OUROBOROS_PREFIX "ipcpd/shm_pci"
+
+#include <ouroboros/logs.h>
+
+struct shm_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;
+
+ struct shm_du_buff * dub;
+
+ struct ipcp_dtp_const dtpc;
+ struct ipcp_dup_const dupc;
+
+};
+
+shm_pci_t * shm_pci_create(struct shm_du_buff * dub,
+ const struct ipcp_dtp_const * dtpc,
+ const struct ipcp_dup_const * dupc)
+{
+ struct shm_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 shm_pci_destroy(shm_pci_t * pci)
+{
+ free(pci);
+}
+
+int shm_pci_init(shm_pci_t * pci)
+{
+ if (pci == NULL) {
+ LOG_DBGF("Bogus input. Bugging out.");
+ return -EINVAL;
+ }
+
+ uint8_t * pci_head = shm_du_buff_head_alloc(
+ pci->dub, SHM_PCI_HEAD_SIZE(pci->dtpc, pci->dupc));
+ uint8_t * pci_tail = shm_du_buff_tail_alloc(
+ pci->dub, SHM_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 shm_pci_release(shm_pci_t * pci)
+{
+ if (pci == NULL)
+ return;
+
+ if (pci->dub == NULL)
+ return;
+
+ shm_du_buff_head_release(pci->dub, SHM_PCI_HEAD_SIZE(pci->dtpc,
+ pci->dupc));
+ shm_du_buff_tail_release(pci->dub, SHM_PCI_TAIL_SIZE(pci->dupc));
+}
diff --git a/src/ipcpd/shm_pci.h b/src/ipcpd/shm_pci.h
new file mode 100644
index 00000000..cb8dd5dd
--- /dev/null
+++ b/src/ipcpd/shm_pci.h
@@ -0,0 +1,43 @@
+/*
+ * Ouroboros - Copyright (C) 2016
+ *
+ * Protocol Control Information in Shared Memory Map
+ *
+ * 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.
+ */
+
+#ifndef OUROBOROS_IPCP_SHM_PCI_H
+#define OUROBOROS_IPCP_SHM_PCI_H
+
+#include <ouroboros/shm_du_map.h>
+
+#include <dt_const.h>
+
+struct shm_pci;
+
+typedef struct shm_pci shm_pci_t;
+
+shm_pci_t * shm_pci_create(struct shm_du_buff * dub,
+ const struct ipcp_dtp_const * dtpc,
+ const struct ipcp_dup_const * dupc);
+void shm_pci_destroy(shm_pci_t * pci);
+
+int shm_pci_init(shm_pci_t * pci);
+void shm_pci_release(shm_pci_t * pci);
+
+#endif /* OUROBOROS_IPCP_SHM_PCI_H */
--
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