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-rw-r--r--ip/link_veth.c86
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,
+};