summaryrefslogtreecommitdiff
path: root/openvpn/event.h
diff options
context:
space:
mode:
Diffstat (limited to 'openvpn/event.h')
-rw-r--r--openvpn/event.h157
1 files changed, 157 insertions, 0 deletions
diff --git a/openvpn/event.h b/openvpn/event.h
new file mode 100644
index 0000000..314ef4c
--- /dev/null
+++ b/openvpn/event.h
@@ -0,0 +1,157 @@
+/*
+ * OpenVPN -- An application to securely tunnel IP networks
+ * over a single TCP/UDP port, with support for SSL/TLS-based
+ * session authentication and key exchange,
+ * packet encryption, packet authentication, and
+ * packet compression.
+ *
+ * Copyright (C) 2002-2005 OpenVPN Solutions LLC <info@openvpn.net>
+ *
+ * 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 (see the file COPYING included with this
+ * distribution); if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#ifndef EVENT_H
+#define EVENT_H
+
+#include "win32.h"
+#include "sig.h"
+#include "perf.h"
+
+/*
+ * rwflags passed to event_ctl and returned by
+ * struct event_set_return.
+ */
+#define EVENT_READ (1<<0)
+#define EVENT_WRITE (1<<1)
+
+/*
+ * Initialization flags passed to event_set_init
+ */
+#define EVENT_METHOD_US_TIMEOUT (1<<0)
+#define EVENT_METHOD_FAST (1<<1)
+
+#ifdef WIN32
+
+typedef const struct rw_handle *event_t;
+
+#define UNDEFINED_EVENT (NULL)
+
+#else
+
+typedef int event_t;
+
+#define UNDEFINED_EVENT (-1)
+
+#endif
+
+struct event_set;
+struct event_set_return;
+
+struct event_set_functions
+{
+ void (*free)(struct event_set *es);
+ void (*reset)(struct event_set *es);
+ void (*del)(struct event_set *es, event_t event);
+ void (*ctl)(struct event_set *es, event_t event, unsigned int rwflags, void *arg);
+
+ /*
+ * Return status for wait:
+ * -1 on signal or error
+ * 0 on timeout
+ * length of event_set_return if at least 1 event is returned
+ */
+ int (*wait)(struct event_set *es, const struct timeval *tv, struct event_set_return *out, int outlen);
+};
+
+struct event_set_return
+{
+ unsigned int rwflags;
+ void *arg;
+};
+
+struct event_set
+{
+ struct event_set_functions func;
+};
+
+/*
+ * maxevents on input: desired max number of event_t descriptors
+ * simultaneously set with event_ctl
+ * maxevents on output: may be modified down, depending on limitations
+ * of underlying API
+ * flags: EVENT_METHOD_x flags
+ */
+struct event_set *event_set_init (int *maxevents, unsigned int flags);
+
+static inline void
+event_free (struct event_set *es)
+{
+ (*es->func.free)(es);
+}
+
+static inline void
+event_reset (struct event_set *es)
+{
+ (*es->func.reset)(es);
+}
+
+static inline void
+event_del (struct event_set *es, event_t event)
+{
+ (*es->func.del)(es, event);
+}
+
+static inline void
+event_ctl (struct event_set *es, event_t event, unsigned int rwflags, void *arg)
+{
+ (*es->func.ctl)(es, event, rwflags, arg);
+}
+
+static inline int
+event_wait (struct event_set *es, const struct timeval *tv, struct event_set_return *out, int outlen)
+{
+ int ret;
+ perf_push (PERF_IO_WAIT);
+ ret = (*es->func.wait)(es, tv, out, outlen);
+ perf_pop ();
+ return ret;
+}
+
+static inline void
+event_set_return_init (struct event_set_return *esr)
+{
+ esr->rwflags = 0;
+ esr->arg = NULL;
+}
+
+#ifdef WIN32
+
+static inline void
+wait_signal (struct event_set *es, void *arg)
+{
+ if (HANDLE_DEFINED (win32_signal.in.read))
+ event_ctl (es, &win32_signal.in, EVENT_READ, arg);
+}
+
+#else
+
+static inline void
+wait_signal (struct event_set *es, void *arg)
+{
+}
+
+#endif
+
+#endif