1 files changed, 86 insertions, 0 deletions
diff --git a/ip/link_veth.c b/ip/link_veth.c
new file mode 100644
index 0000000..33e8f2b
--- /dev/null
+++ b/ip/link_veth.c
@@ -0,0 +1,86 @@
+/*
+ * link_veth.c	veth driver module
+ *
+ *		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.
+ *
+ * Authors:	Pavel Emelianov <xemul@openvz.org>
+ *
+ */
+
+#include <string.h>
+#include <net/if.h>
+#include <linux/veth.h>
+
+#include "utils.h"
+#include "ip_common.h"
+
+static void print_usage(FILE *f)
+{
+	printf("Usage: ip link <options> type veth [peer <options>]\n"
+	       "To get <options> type 'ip link add help'\n");
+}
+
+static void usage(void)
+{
+	print_usage(stderr);
+}
+
+static int veth_parse_opt(struct link_util *lu, int argc, char **argv,
+			  struct nlmsghdr *n)
+{
+	char *type = NULL;
+	int err;
+	struct rtattr *data;
+	struct ifinfomsg *ifm, *peer_ifm;
+	unsigned int ifi_flags, ifi_change, ifi_index;
+
+	if (strcmp(argv[0], "peer") != 0) {
+		usage();
+		return -1;
+	}
+
+	ifm = NLMSG_DATA(n);
+	ifi_flags = ifm->ifi_flags;
+	ifi_change = ifm->ifi_change;
+	ifi_index = ifm->ifi_index;
+	ifm->ifi_flags = 0;
+	ifm->ifi_change = 0;
+	ifm->ifi_index = 0;
+
+	data = addattr_nest(n, 1024, VETH_INFO_PEER);
+
+	n->nlmsg_len += sizeof(struct ifinfomsg);
+
+	err = iplink_parse(argc - 1, argv + 1, (struct iplink_req *)n, &type);
+	if (err < 0)
+		return err;
+
+	if (type)
+		duparg("type", argv[err]);
+
+	peer_ifm = RTA_DATA(data);
+	peer_ifm->ifi_index = ifm->ifi_index;
+	peer_ifm->ifi_flags = ifm->ifi_flags;
+	peer_ifm->ifi_change = ifm->ifi_change;
+	ifm->ifi_flags = ifi_flags;
+	ifm->ifi_change = ifi_change;
+	ifm->ifi_index = ifi_index;
+
+	addattr_nest_end(n, data);
+	return argc - 1 - err;
+}
+
+static void veth_print_help(struct link_util *lu, int argc, char **argv,
+	FILE *f)
+{
+	print_usage(f);
+}
+
+struct link_util veth_link_util = {
+	.id = "veth",
+	.parse_opt = veth_parse_opt,
+	.print_help = veth_print_help,
+};