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/*
* Check decoding of IFLA_PROTINFO netlink attribute.
*
* Copyright (c) 2017 JingPiao Chen <chenjingpiao@gmail.com>
* Copyright (c) 2021 Eugene Syromyatnikov <evgsyr@gmail.com>
* Copyright (c) 2017-2021 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "tests.h"
#include <inttypes.h>
#include <netinet/in.h>
#include <linux/if_arp.h>
#include <linux/if_link.h>
#include <linux/rtnetlink.h>
#include <stdio.h>
#include "test_nlattr.h"
#include "xlat.h"
#include "xlat/addrfams.h"
#include "nlattr_ifla_af_inet6.h"
static const unsigned int hdrlen = sizeof(struct ifinfomsg);
static uint16_t af;
static const char *af_str;
static void
init_ifinfomsg(struct nlmsghdr *const nlh, const unsigned int msg_len)
{
SET_STRUCT(struct nlmsghdr, nlh,
.nlmsg_len = msg_len,
.nlmsg_type = RTM_GETLINK,
.nlmsg_flags = NLM_F_DUMP
);
struct ifinfomsg *const msg = NLMSG_DATA(nlh);
SET_STRUCT(struct ifinfomsg, msg,
.ifi_family = af,
.ifi_type = ARPHRD_LOOPBACK,
.ifi_index = ifindex_lo(),
.ifi_flags = IFF_UP,
);
}
static void
init_ifinfomsg_protinfo(struct nlmsghdr *const nlh, const unsigned int msg_len)
{
init_ifinfomsg(nlh, msg_len);
struct nlattr *const nla = NLMSG_ATTR(nlh, sizeof(struct ifinfomsg));
SET_STRUCT(struct nlattr, nla,
.nla_len = msg_len - NLMSG_SPACE(hdrlen),
.nla_type = IFLA_PROTINFO,
);
}
static void
print_ifinfomsg(const unsigned int msg_len)
{
printf("{nlmsg_len=%u, nlmsg_type=" XLAT_FMT ", nlmsg_flags=" XLAT_FMT
", nlmsg_seq=0, nlmsg_pid=0}, {ifi_family=%s"
", ifi_type=" XLAT_FMT ", ifi_index=" XLAT_FMT_U
", ifi_flags=" XLAT_FMT ", ifi_change=0}",
msg_len, XLAT_ARGS(RTM_GETLINK), XLAT_ARGS(NLM_F_DUMP),
af_str, XLAT_ARGS(ARPHRD_LOOPBACK),
XLAT_SEL(ifindex_lo(), IFINDEX_LO_STR), XLAT_ARGS(IFF_UP));
}
static void
print_ifinfomsg_protinfo(const unsigned int msg_len)
{
print_ifinfomsg(msg_len);
printf(", [{nla_len=%u, nla_type=" XLAT_FMT "}",
msg_len - NLMSG_SPACE(hdrlen), XLAT_ARGS(IFLA_PROTINFO));
}
int
main(void)
{
skip_if_unavailable("/proc/self/fd/");
const int fd = create_nl_socket(NETLINK_ROUTE);
void *nlh0 = midtail_alloc(NLMSG_SPACE(hdrlen),
NLA_HDRLEN * 2 + 42);
static char buf[256];
fill_memory_ex(buf, sizeof(buf), 32, 224);
/* Unsupported address families */
static const uint8_t skip_af[] = { AF_BRIDGE, AF_INET6 };
size_t pos = 0;
for (size_t i = 0; i < 256; i++) {
if (i == skip_af[pos]) {
pos += 1;
continue;
}
af = i;
af_str = sprintxval(addrfams, i, "AF_???");
TEST_NLATTR_(fd, nlh0, hdrlen, init_ifinfomsg, print_ifinfomsg,
IFLA_PROTINFO, XLAT_STR(IFLA_PROTINFO),
42, buf, 42,
print_quoted_hex(buf, 32);
printf("..."));
}
/* AF_BRIDGE is handled by nlattr_ifla_brport */
/* AF_INET6 */
static char af_inet6_str[20];
af = AF_INET6;
snprintf(af_inet6_str, sizeof(af_inet6_str), XLAT_FMT,
XLAT_ARGS(AF_INET6));
af_str = af_inet6_str;
check_ifla_af_inet6(fd, nlh0, hdrlen,
init_ifinfomsg_protinfo, print_ifinfomsg_protinfo,
buf, 1);
puts("+++ exited with 0 +++");
return 0;
}
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