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authordimitri staessens <dimitri.staessens@intec.ugent.be>2016-03-27 14:17:40 +0200
committerdimitri staessens <dimitri.staessens@intec.ugent.be>2016-03-27 18:04:38 +0200
commit1e83a165d50aacc4e1146186c5691be3326368ca (patch)
treeb23c14f58e2b774d1fa203ac014c3d69a970e21c /src/ipcpd
parente5d67f7d4df123c2490201447681f2efd553dcc1 (diff)
downloadouroboros-1e83a165d50aacc4e1146186c5691be3326368ca.tar.gz
ouroboros-1e83a165d50aacc4e1146186c5691be3326368ca.zip
ipcpd: flow structure for maintaining flows
The flow structure can be used to maintain the status of flows in ipcp instances. It should probably not be exposed outside ipcpd's. It has a flag FLOW_MT_SAFE which includes locking in case the IPCP has a multithreaded implementation that may require it.
Diffstat (limited to 'src/ipcpd')
-rw-r--r--src/ipcpd/CMakeLists.txt1
-rw-r--r--src/ipcpd/flow.c83
-rw-r--r--src/ipcpd/flow.h66
3 files changed, 150 insertions, 0 deletions
diff --git a/src/ipcpd/CMakeLists.txt b/src/ipcpd/CMakeLists.txt
index bcb5b986..27d41801 100644
--- a/src/ipcpd/CMakeLists.txt
+++ b/src/ipcpd/CMakeLists.txt
@@ -9,6 +9,7 @@ set(SOURCE_FILES
main.c
pci.c
shm_pci.c
+ flow.c
)
add_executable (ipcpd ${SOURCE_FILES})
diff --git a/src/ipcpd/flow.c b/src/ipcpd/flow.c
new file mode 100644
index 00000000..395a0a0d
--- /dev/null
+++ b/src/ipcpd/flow.c
@@ -0,0 +1,83 @@
+/*
+ * Ouroboros - Copyright (C) 2016
+ *
+ * Flows
+ *
+ * Dimitri Staessens <dimitri.staessens@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 "flow.h"
+#include <malloc.h>
+
+#define OUROBOROS_PREFIX "ipcpd/flow"
+
+#include <ouroboros/logs.h>
+
+flow_t * flow_create(port_id_t port_id)
+{
+ flow_t * flow = malloc(sizeof *flow);
+ flow->port_id = port_id;
+ flow->flags = FLOW_O_DEFAULT;
+ flow->state = FLOW_INIT;
+
+#ifdef FLOW_MT_SAFE
+ pthread_mutex_init(&flow->lock, NULL);
+#endif
+ return flow;
+}
+
+void flow_destroy(flow_t * flow)
+{
+ free(flow);
+}
+
+int flow_set_opts(flow_t * flow, uint16_t opts)
+{
+ if (flow == NULL) {
+ LOG_ERR("Non-existing flow.");
+ return -1;
+ }
+
+#ifdef FLOW_MT_SAFE
+ pthread_mutex_lock(&flow->lock);
+#endif
+
+ if ((opts & FLOW_O_ACCMODE) == FLOW_O_ACCMODE) {
+#ifdef FLOW_MT_SAFE
+ pthread_mutex_unlock(&flow->lock);
+#endif
+ LOG_WARN("Invalid flow options. Setting default.");
+ opts = FLOW_O_DEFAULT;
+ }
+
+ flow->flags = opts;
+
+#ifdef FLOW_MT_SAFE
+ pthread_mutex_unlock(&flow->lock);
+#endif
+ return 0;
+}
+
+uint16_t flow_get_opts(const flow_t * flow)
+{
+ if (flow == NULL) {
+ LOG_ERR("Non-existing flow.");
+ return FLOW_O_INVALID;
+ }
+
+ return flow->flags;
+}
diff --git a/src/ipcpd/flow.h b/src/ipcpd/flow.h
new file mode 100644
index 00000000..83f4076d
--- /dev/null
+++ b/src/ipcpd/flow.h
@@ -0,0 +1,66 @@
+/*
+ * Ouroboros - Copyright (C) 2016
+ *
+ * Flows
+ *
+ * Dimitri Staessens <dimitri.staessens@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 IPCPD_FLOW_H
+#define IPCPD_FLOW_H
+
+#include <ouroboros/common.h>
+
+#ifdef FLOW_MT_SAFE
+#include <pthread.h>
+#endif
+
+/* same values as fcntl.h */
+#define FLOW_O_RDONLY 00000000
+#define FLOW_O_WRONLY 00000001
+#define FLOW_O_RDWR 00000002
+#define FLOW_O_ACCMODE 00000003
+
+#define FLOW_O_NONBLOCK 00004000
+#define FLOW_O_DEFAULT 00000002
+
+#define FLOW_O_INVALID 00037777
+
+typedef long port_id_t;
+
+enum flow_state {
+ FLOW_INIT = 0,
+ FLOW_ALLOCATED,
+ FLOW_PENDING
+};
+
+typedef struct flow {
+ port_id_t port_id;
+ uint16_t flags;
+ uint8_t state;
+#ifdef FLOW_MT_SAFE
+ pthread_mutex_t lock;
+#endif
+} flow_t;
+
+flow_t * flow_create(port_id_t port_id);
+void flow_destroy(flow_t * flow);
+
+int flow_set_opts(flow_t * flow, uint16_t opts);
+uint16_t flow_get_opts(const flow_t * flow);
+
+#endif /* IPCPD_FLOW_H */