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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* iptoken.c "ip token"
*
* Authors: Daniel Borkmann, <borkmann@redhat.com>
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <arpa/inet.h>
#include <linux/types.h>
#include <linux/if.h>
#include "rt_names.h"
#include "utils.h"
#include "ip_common.h"
#include "json_print.h"
extern struct rtnl_handle rth;
struct rtnl_dump_args {
FILE *fp;
int ifindex;
};
static void usage(void) __attribute__((noreturn));
static void usage(void)
{
fprintf(stderr, "Usage: ip token [ list | set | del | get ] [ TOKEN ] [ dev DEV ]\n");
exit(-1);
}
static int print_token(struct nlmsghdr *n, void *arg)
{
struct rtnl_dump_args *args = arg;
FILE *fp = args->fp;
int ifindex = args->ifindex;
struct ifinfomsg *ifi = NLMSG_DATA(n);
int len = n->nlmsg_len;
struct rtattr *tb[IFLA_MAX + 1];
struct rtattr *ltb[IFLA_INET6_MAX + 1];
if (n->nlmsg_type != RTM_NEWLINK)
return -1;
len -= NLMSG_LENGTH(sizeof(*ifi));
if (len < 0)
return -1;
if (ifi->ifi_family != AF_INET6)
return 0;
if (ifi->ifi_index == 0)
return 0;
if (ifindex > 0 && ifi->ifi_index != ifindex)
return 0;
if (ifi->ifi_flags & (IFF_LOOPBACK | IFF_NOARP))
return 0;
parse_rtattr(tb, IFLA_MAX, IFLA_RTA(ifi), len);
if (!tb[IFLA_PROTINFO])
return -1;
parse_rtattr_nested(ltb, IFLA_INET6_MAX, tb[IFLA_PROTINFO]);
if (!ltb[IFLA_INET6_TOKEN]) {
fprintf(stderr, "Seems there's no support for IPv6 token!\n");
return -1;
}
open_json_object(NULL);
print_string(PRINT_FP, NULL, "token ", NULL);
print_color_string(PRINT_ANY,
ifa_family_color(ifi->ifi_family),
"token", "%s",
format_host_rta(ifi->ifi_family, ltb[IFLA_INET6_TOKEN]));
print_string(PRINT_FP, NULL, " dev ", NULL);
print_color_string(PRINT_ANY, COLOR_IFNAME,
"ifname", "%s\n",
ll_index_to_name(ifi->ifi_index));
close_json_object();
fflush(fp);
return 0;
}
static int iptoken_list(int argc, char **argv)
{
int af = AF_INET6;
struct rtnl_dump_args da = { .fp = stdout };
while (argc > 0) {
if (strcmp(*argv, "dev") == 0) {
NEXT_ARG();
if ((da.ifindex = ll_name_to_index(*argv)) == 0)
invarg("dev is invalid\n", *argv);
break;
}
argc--; argv++;
}
if (rtnl_linkdump_req(&rth, af) < 0) {
perror("Cannot send dump request");
return -1;
}
new_json_obj(json);
if (rtnl_dump_filter(&rth, print_token, &da) < 0) {
delete_json_obj();
fprintf(stderr, "Dump terminated\n");
return -1;
}
delete_json_obj();
return 0;
}
static int iptoken_set(int argc, char **argv, bool delete)
{
struct {
struct nlmsghdr n;
struct ifinfomsg ifi;
char buf[512];
} req = {
.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
.n.nlmsg_flags = NLM_F_REQUEST,
.n.nlmsg_type = RTM_SETLINK,
.ifi.ifi_family = AF_INET6,
};
struct rtattr *afs, *afs6;
bool have_token = delete, have_dev = false;
inet_prefix addr = { .bytelen = 16, };
while (argc > 0) {
if (strcmp(*argv, "dev") == 0) {
NEXT_ARG();
if (!have_dev) {
if ((req.ifi.ifi_index =
ll_name_to_index(*argv)) == 0)
invarg("dev is invalid\n", *argv);
have_dev = true;
}
} else {
if (matches(*argv, "help") == 0)
usage();
if (!have_token) {
get_prefix(&addr, *argv, req.ifi.ifi_family);
have_token = true;
}
}
argc--; argv++;
}
if (!have_token) {
fprintf(stderr, "Not enough information: token is required.\n");
return -1;
}
if (!have_dev) {
fprintf(stderr, "Not enough information: \"dev\" argument is required.\n");
return -1;
}
afs = addattr_nest(&req.n, sizeof(req), IFLA_AF_SPEC);
afs6 = addattr_nest(&req.n, sizeof(req), AF_INET6);
addattr_l(&req.n, sizeof(req), IFLA_INET6_TOKEN,
&addr.data, addr.bytelen);
addattr_nest_end(&req.n, afs6);
addattr_nest_end(&req.n, afs);
if (rtnl_talk(&rth, &req.n, NULL) < 0)
return -2;
return 0;
}
int do_iptoken(int argc, char **argv)
{
ll_init_map(&rth);
if (argc < 1) {
return iptoken_list(0, NULL);
} else if (matches(argv[0], "list") == 0 ||
matches(argv[0], "lst") == 0 ||
matches(argv[0], "show") == 0) {
return iptoken_list(argc - 1, argv + 1);
} else if (matches(argv[0], "set") == 0 ||
matches(argv[0], "add") == 0) {
return iptoken_set(argc - 1, argv + 1, false);
} else if (matches(argv[0], "delete") == 0) {
return iptoken_set(argc - 1, argv + 1, true);
} else if (matches(argv[0], "get") == 0) {
return iptoken_list(argc - 1, argv + 1);
} else if (matches(argv[0], "help") == 0)
usage();
fprintf(stderr, "Command \"%s\" is unknown, try \"ip token help\".\n", *argv);
exit(-1);
}
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