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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* link_vti6.c VTI driver module
*
* Authors: Herbert Xu <herbert@gondor.apana.org.au>
* Saurabh Mohan <saurabh.mohan@vyatta.com> Modified link_gre.c for VTI
* Steffen Klassert <steffen.klassert@secunet.com> Modified link_vti.c for IPv6
*/
#include <string.h>
#include <net/if.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <linux/ip.h>
#include <linux/if_tunnel.h>
#include "rt_names.h"
#include "utils.h"
#include "ip_common.h"
#include "tunnel.h"
static void vti6_print_help(struct link_util *lu, int argc, char **argv,
FILE *f)
{
fprintf(f,
"Usage: ... %-4s [ remote ADDR ]\n"
" [ local ADDR ]\n"
" [ [i|o]key KEY ]\n"
" [ dev PHYS_DEV ]\n"
" [ fwmark MARK ]\n"
"\n"
"Where: ADDR := { IPV6_ADDRESS }\n"
" KEY := { DOTTED_QUAD | NUMBER }\n"
" MARK := { 0x0..0xffffffff }\n",
lu->id);
}
static int vti6_parse_opt(struct link_util *lu, int argc, char **argv,
struct nlmsghdr *n)
{
struct ifinfomsg *ifi = NLMSG_DATA(n);
struct {
struct nlmsghdr n;
struct ifinfomsg i;
} req = {
.n.nlmsg_len = NLMSG_LENGTH(sizeof(*ifi)),
.n.nlmsg_flags = NLM_F_REQUEST,
.n.nlmsg_type = RTM_GETLINK,
.i.ifi_family = preferred_family,
.i.ifi_index = ifi->ifi_index,
};
struct nlmsghdr *answer = NULL;
struct rtattr *tb[IFLA_MAX + 1];
struct rtattr *linkinfo[IFLA_INFO_MAX+1];
struct rtattr *vtiinfo[IFLA_VTI_MAX + 1];
__be32 ikey = 0;
__be32 okey = 0;
inet_prefix saddr, daddr;
unsigned int link = 0;
__u32 fwmark = 0;
int len;
inet_prefix_reset(&saddr);
inet_prefix_reset(&daddr);
if (!(n->nlmsg_flags & NLM_F_CREATE)) {
const struct rtattr *rta;
if (rtnl_talk(&rth, &req.n, &answer) < 0)
goto get_failed;
len = answer->nlmsg_len;
len -= NLMSG_LENGTH(sizeof(*ifi));
if (len < 0)
goto get_failed;
parse_rtattr(tb, IFLA_MAX, IFLA_RTA(NLMSG_DATA(answer)), len);
if (!tb[IFLA_LINKINFO])
goto get_failed;
parse_rtattr_nested(linkinfo, IFLA_INFO_MAX, tb[IFLA_LINKINFO]);
if (!linkinfo[IFLA_INFO_DATA])
goto get_failed;
parse_rtattr_nested(vtiinfo, IFLA_VTI_MAX,
linkinfo[IFLA_INFO_DATA]);
rta = vtiinfo[IFLA_VTI_LOCAL];
if (rta && get_addr_rta(&saddr, rta, AF_INET6))
goto get_failed;
rta = vtiinfo[IFLA_VTI_REMOTE];
if (rta && get_addr_rta(&daddr, rta, AF_INET6))
goto get_failed;
if (vtiinfo[IFLA_VTI_IKEY])
ikey = rta_getattr_u32(vtiinfo[IFLA_VTI_IKEY]);
if (vtiinfo[IFLA_VTI_OKEY])
okey = rta_getattr_u32(vtiinfo[IFLA_VTI_OKEY]);
if (vtiinfo[IFLA_VTI_LINK])
link = rta_getattr_u8(vtiinfo[IFLA_VTI_LINK]);
if (vtiinfo[IFLA_VTI_FWMARK])
fwmark = rta_getattr_u32(vtiinfo[IFLA_VTI_FWMARK]);
free(answer);
}
while (argc > 0) {
if (!matches(*argv, "key")) {
NEXT_ARG();
ikey = okey = tnl_parse_key("key", *argv);
} else if (!matches(*argv, "ikey")) {
NEXT_ARG();
ikey = tnl_parse_key("ikey", *argv);
} else if (!matches(*argv, "okey")) {
NEXT_ARG();
okey = tnl_parse_key("okey", *argv);
} else if (!matches(*argv, "remote")) {
NEXT_ARG();
get_addr(&daddr, *argv, AF_INET6);
} else if (!matches(*argv, "local")) {
NEXT_ARG();
get_addr(&saddr, *argv, AF_INET6);
} else if (!matches(*argv, "dev")) {
NEXT_ARG();
link = ll_name_to_index(*argv);
if (!link)
exit(nodev(*argv));
} else if (strcmp(*argv, "fwmark") == 0) {
NEXT_ARG();
if (get_u32(&fwmark, *argv, 0))
invarg("invalid fwmark\n", *argv);
} else {
vti6_print_help(lu, argc, argv, stderr);
return -1;
}
argc--; argv++;
}
addattr32(n, 1024, IFLA_VTI_IKEY, ikey);
addattr32(n, 1024, IFLA_VTI_OKEY, okey);
if (is_addrtype_inet_not_unspec(&saddr))
addattr_l(n, 1024, IFLA_VTI_LOCAL, saddr.data, saddr.bytelen);
if (is_addrtype_inet_not_unspec(&daddr))
addattr_l(n, 1024, IFLA_VTI_REMOTE, daddr.data, daddr.bytelen);
addattr32(n, 1024, IFLA_VTI_FWMARK, fwmark);
if (link)
addattr32(n, 1024, IFLA_VTI_LINK, link);
return 0;
get_failed:
fprintf(stderr, "Failed to get existing tunnel info.\n");
free(answer);
return -1;
}
static void vti6_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
{
char s2[64];
if (!tb)
return;
tnl_print_endpoint("remote", tb[IFLA_VTI_REMOTE], AF_INET6);
tnl_print_endpoint("local", tb[IFLA_VTI_LOCAL], AF_INET6);
if (tb[IFLA_VTI_LINK]) {
__u32 link = rta_getattr_u32(tb[IFLA_VTI_LINK]);
if (link) {
print_string(PRINT_ANY, "link", "dev %s ",
ll_index_to_name(link));
}
}
if (tb[IFLA_VTI_IKEY]) {
struct rtattr *rta = tb[IFLA_VTI_IKEY];
__u32 key = rta_getattr_u32(rta);
if (key && inet_ntop(AF_INET, RTA_DATA(rta), s2, sizeof(s2)))
print_string(PRINT_ANY, "ikey", "ikey %s ", s2);
}
if (tb[IFLA_VTI_OKEY]) {
struct rtattr *rta = tb[IFLA_VTI_OKEY];
__u32 key = rta_getattr_u32(rta);
if (key && inet_ntop(AF_INET, RTA_DATA(rta), s2, sizeof(s2)))
print_string(PRINT_ANY, "okey", "okey %s ", s2);
}
if (tb[IFLA_VTI_FWMARK]) {
__u32 fwmark = rta_getattr_u32(tb[IFLA_VTI_FWMARK]);
if (fwmark) {
print_0xhex(PRINT_ANY,
"fwmark", "fwmark %#llx ", fwmark);
}
}
}
struct link_util vti6_link_util = {
.id = "vti6",
.maxattr = IFLA_VTI_MAX,
.parse_opt = vti6_parse_opt,
.print_opt = vti6_print_opt,
.print_help = vti6_print_help,
};
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