mirror of
https://git.kernel.org/pub/scm/network/iproute2/iproute2.git
synced 2026-01-26 14:13:24 +00:00
51a63279f0
Support for collect metadata mode was introduced in kernel commit
abc340b38ba2 ("xfrm: interface: support collect metadata mode")
This commit adds support for creating xfrm interfaces in this
mode.
Example use:
ip link add ipsec1 type xfrm external
Signed-off-by: Eyal Birger <eyal.birger@gmail.com>
Reviewed-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David Ahern <dsahern@kernel.org>
102 lines
2.0 KiB
C
102 lines
2.0 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* link_xfrm.c Virtual XFRM Interface driver module
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*
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* Authors: Matt Ellison <matt@arroyo.io>
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*/
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#include <string.h>
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#include <linux/if_link.h>
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#include "rt_names.h"
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#include "utils.h"
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#include "ip_common.h"
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#include "tunnel.h"
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static void xfrm_print_help(struct link_util *lu, int argc, char **argv,
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FILE *f)
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{
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fprintf(f,
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"Usage: ... %-4s dev [ PHYS_DEV ] [ if_id IF-ID ]\n"
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" [ external ]\n"
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"\n"
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"Where: IF-ID := { 0x1..0xffffffff }\n",
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lu->id);
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}
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static int xfrm_parse_opt(struct link_util *lu, int argc, char **argv,
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struct nlmsghdr *n)
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{
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unsigned int link = 0;
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bool metadata = false;
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__u32 if_id = 0;
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while (argc > 0) {
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if (!matches(*argv, "dev")) {
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NEXT_ARG();
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link = ll_name_to_index(*argv);
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if (!link)
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exit(nodev(*argv));
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} else if (!matches(*argv, "if_id")) {
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NEXT_ARG();
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if (get_u32(&if_id, *argv, 0))
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invarg("if_id value is invalid", *argv);
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else if (!if_id)
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invarg("if_id value is invalid", *argv);
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else
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addattr32(n, 1024, IFLA_XFRM_IF_ID, if_id);
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} else if (!strcmp(*argv, "external")) {
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metadata = true;
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} else {
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xfrm_print_help(lu, argc, argv, stderr);
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return -1;
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}
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argc--; argv++;
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}
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if (metadata) {
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if (if_id || link) {
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fprintf(stderr, "xfrmi: both 'external' and if_id/link cannot be specified\n");
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return -1;
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}
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addattr(n, 1024, IFLA_XFRM_COLLECT_METADATA);
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return 0;
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}
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if (!if_id)
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missarg("IF_ID");
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if (link)
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addattr32(n, 1024, IFLA_XFRM_LINK, link);
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return 0;
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}
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static void xfrm_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
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{
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if (!tb)
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return;
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if (tb[IFLA_XFRM_COLLECT_METADATA]) {
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print_bool(PRINT_ANY, "external", "external ", true);
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return;
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}
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if (tb[IFLA_XFRM_IF_ID]) {
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__u32 id = rta_getattr_u32(tb[IFLA_XFRM_IF_ID]);
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print_0xhex(PRINT_ANY, "if_id", "if_id %#llx ", id);
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}
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}
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struct link_util xfrm_link_util = {
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.id = "xfrm",
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.maxattr = IFLA_XFRM_MAX,
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.parse_opt = xfrm_parse_opt,
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.print_opt = xfrm_print_opt,
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.print_help = xfrm_print_help,
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};
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