X-Git-Url: https://www.tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=src%2Fvde_device.c;fp=src%2Fvde_device.c;h=8f601e79361040d7c82c0e021b89680a20a26015;hp=0000000000000000000000000000000000000000;hb=178e52f76ef4ba40748c13ea7e518837394d6dbc;hpb=5672863e59e6a114ac6b66de98254b14266c0e61

diff --git a/src/vde_device.c b/src/vde_device.c
new file mode 100644
index 00000000..8f601e79
--- /dev/null
+++ b/src/vde_device.c
@@ -0,0 +1,139 @@
+/*
+    device.c -- VDE plug
+    Copyright (C) 2011 Guus Sliepen <guus@tinc-vpn.org>
+
+    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.,
+    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#include "system.h"
+
+#include <libvdeplug_dyn.h>
+
+#include "conf.h"
+#include "device.h"
+#include "net.h"
+#include "logger.h"
+#include "utils.h"
+#include "route.h"
+#include "xalloc.h"
+
+static struct vdepluglib plug;
+static struct vdeconn *conn = NULL;
+static int port = 0;
+static char *group = NULL;
+static char *device_info;
+
+extern char *identname;
+extern volatile bool running;
+
+static uint64_t device_total_in = 0;
+static uint64_t device_total_out = 0;
+
+static bool setup_device(void) {
+	libvdeplug_dynopen(plug);
+
+	if(!plug.dl_handle) {
+		logger(LOG_ERR, "Could not open libvdeplug library!");
+		return false;
+	}
+
+	if(!get_config_string(lookup_config(config_tree, "Device"), &device))
+		xasprintf(&device, LOCALSTATEDIR "/run/vde.ctl");
+
+	get_config_string(lookup_config(config_tree, "Interface"), &iface);
+
+	get_config_int(lookup_config(config_tree, "VDEPort"), &port);
+
+	get_config_string(lookup_config(config_tree, "VDEGroup"), &group);
+
+	device_info = "VDE socket";
+
+	struct vde_open_args args = {
+		.port = port,
+		.group = group,
+		.mode = 0700,
+	};
+
+	conn = plug.vde_open(device, identname, &args);
+	if(!conn) {
+		logger(LOG_ERR, "Could not open VDE socket %s", device);
+		return false;
+	}
+
+	device_fd = plug.vde_datafd(conn);
+
+	logger(LOG_INFO, "%s is a %s", device, device_info);
+
+	if(routing_mode == RMODE_ROUTER)
+		overwrite_mac = true;
+
+	return true;
+}
+
+static void close_device(void) {
+	if(conn)
+		plug.vde_close(conn);
+
+	if(plug.dl_handle)
+		libvdeplug_dynclose(plug);
+
+	free(device);
+
+	free(iface);
+}
+
+static bool read_packet(vpn_packet_t *packet) {
+	int lenin = plug.vde_recv(conn, packet->data, MTU, 0);
+	if(lenin <= 0) {
+		logger(LOG_ERR, "Error while reading from %s %s: %s", device_info, device, strerror(errno));
+		running = false;
+		return false;
+	}
+
+	packet->len = lenin;
+	device_total_in += packet->len;
+	ifdebug(TRAFFIC) logger(LOG_DEBUG, "Read packet of %d bytes from %s", packet->len, device_info);
+
+	return true;
+}
+
+static bool write_packet(vpn_packet_t *packet) {
+	if(plug.vde_send(conn, packet->data, packet->len, 0) < 0) {
+		if(errno != EINTR && errno != EAGAIN) {
+			logger(LOG_ERR, "Can't write to %s %s: %s", device_info, device, strerror(errno));
+			running = false;
+		}
+
+		return false;
+	}
+
+	device_total_out += packet->len;
+
+	return true;
+}
+
+static void dump_device_stats(void) {
+	logger(LOG_DEBUG, "Statistics for %s %s:", device_info, device);
+	logger(LOG_DEBUG, " total bytes in:  %10"PRIu64, device_total_in);
+	logger(LOG_DEBUG, " total bytes out: %10"PRIu64, device_total_out);
+}
+
+const devops_t vde_devops = {
+	.setup = setup_device,
+	.close = close_device,
+	.read = read_packet,
+	.write = write_packet,
+	.dump_stats = dump_device_stats,
+};