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/*
* Copyright (c) 2017 JingPiao Chen <chenjingpiao@gmail.com>
* Copyright (c) 2017-2021 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "tests.h"
#include <stdio.h>
#include <stdint.h>
#include "test_nlattr.h"
#define NLMSGERR_ATTR_COOKIE 3
static void
init_nlmsgerr(struct nlmsghdr *const nlh, const unsigned int msg_len)
{
SET_STRUCT(struct nlmsghdr, nlh,
.nlmsg_len = msg_len,
.nlmsg_type = NLMSG_ERROR,
.nlmsg_flags = NLM_F_REQUEST | NLM_F_CAPPED
);
struct nlmsgerr *const err = NLMSG_DATA(nlh);
SET_STRUCT(struct nlmsgerr, err,
.error = -13,
.msg = {
.nlmsg_len = NLMSG_HDRLEN + 4,
.nlmsg_type = NLMSG_NOOP,
.nlmsg_flags = NLM_F_REQUEST,
}
);
}
static void
print_nlmsgerr(const unsigned int msg_len)
{
printf("{nlmsg_len=%u, nlmsg_type=NLMSG_ERROR"
", nlmsg_flags=NLM_F_REQUEST|NLM_F_CAPPED"
", nlmsg_seq=0, nlmsg_pid=0}, [{error=-EACCES"
", msg={nlmsg_len=%u, nlmsg_type=NLMSG_NOOP"
", nlmsg_flags=NLM_F_REQUEST, nlmsg_seq=0, nlmsg_pid=0}}",
msg_len, NLMSG_HDRLEN + 4);
}
int
main(void)
{
skip_if_unavailable("/proc/self/fd/");
static const uint8_t cookie[] = { 0xab, 0xfe };
const int fd = create_nl_socket(NETLINK_SOCK_DIAG);
const unsigned int hdrlen = sizeof(struct nlmsgerr);
void *const nlh0 = midtail_alloc(NLMSG_SPACE(hdrlen),
NLA_HDRLEN + sizeof(cookie));
TEST_NLATTR(fd, nlh0, hdrlen,
init_nlmsgerr, print_nlmsgerr,
NLMSGERR_ATTR_COOKIE,
sizeof(cookie), cookie, sizeof(cookie),
printf("[%u, %u]", cookie[0], cookie[1]);
printf("]"));
printf("+++ exited with 0 +++\n");
return 0;
}
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