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/*
* Check decoding of netlink protocol.
*
* Copyright (c) 2014-2017 Dmitry V. Levin <ldv@strace.io>
* Copyright (c) 2016 Fabien Siron <fabien.siron@epita.fr>
* Copyright (c) 2016-2021 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "tests.h"
#ifdef HAVE_SYS_XATTR_H
# include <stdio.h>
# include <stdlib.h>
# include <string.h>
# include <unistd.h>
# include <sys/xattr.h>
# include <netinet/in.h>
# include "netlink.h"
# include <linux/sock_diag.h>
# include <linux/netlink_diag.h>
# include "xmalloc.h"
static void
send_query(const int fd)
{
static const struct req {
struct nlmsghdr nlh;
const char magic[4];
} c_req = {
.nlh = {
.nlmsg_len = sizeof(struct req),
.nlmsg_type = NLMSG_NOOP,
.nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST
},
.magic = "abcd"
};
struct req *const req = tail_memdup(&c_req, sizeof(c_req));
long rc;
const char *errstr;
/* zero address */
rc = sendto(fd, NULL, sizeof(*req), MSG_DONTWAIT, NULL, 0);
printf("sendto(%d, NULL, %u, MSG_DONTWAIT, NULL, 0) = %s\n",
fd, (unsigned) sizeof(*req), sprintrc(rc));
/* zero length */
rc = sendto(fd, req, 0, MSG_DONTWAIT, NULL, 0);
printf("sendto(%d, \"\", 0, MSG_DONTWAIT, NULL, 0) = %s\n",
fd, sprintrc(rc));
/* zero address and length */
rc = sendto(fd, NULL, 0, MSG_DONTWAIT, NULL, 0);
printf("sendto(%d, NULL, 0, MSG_DONTWAIT, NULL, 0) = %s\n",
fd, sprintrc(rc));
/* unfetchable struct nlmsghdr */
const void *const efault = tail_alloc(sizeof(struct nlmsghdr) - 1);
rc = sendto(fd, efault, sizeof(struct nlmsghdr), MSG_DONTWAIT, NULL, 0);
printf("sendto(%d, %p, %u, MSG_DONTWAIT, NULL, 0) = %s\n",
fd, efault, (unsigned) sizeof(struct nlmsghdr), sprintrc(rc));
/* whole message length < sizeof(struct nlmsghdr) */
rc = sendto(fd, req->magic, sizeof(req->magic), MSG_DONTWAIT, NULL, 0);
printf("sendto(%d, \"\\x61\\x62\\x63\\x64\""
", %u, MSG_DONTWAIT, NULL, 0) = %s\n",
fd, (unsigned) sizeof(req->magic), sprintrc(rc));
/* a single message with some data */
rc = sendto(fd, req, sizeof(*req), MSG_DONTWAIT, NULL, 0);
printf("sendto(%d, [{nlmsg_len=%u, nlmsg_type=NLMSG_NOOP"
", nlmsg_flags=NLM_F_REQUEST|0x%x"
", nlmsg_seq=0, nlmsg_pid=0}, \"\\x61\\x62\\x63\\x64\"]"
", %u, MSG_DONTWAIT, NULL, 0) = %s\n",
fd, req->nlh.nlmsg_len, NLM_F_DUMP,
(unsigned) sizeof(*req), sprintrc(rc));
/* a single message without data */
req->nlh.nlmsg_len = sizeof(req->nlh);
rc = sendto(fd, &req->nlh, sizeof(req->nlh), MSG_DONTWAIT, NULL, 0);
printf("sendto(%d, {nlmsg_len=%u, nlmsg_type=NLMSG_NOOP"
", nlmsg_flags=NLM_F_REQUEST|0x%x"
", nlmsg_seq=0, nlmsg_pid=0}, %u, MSG_DONTWAIT, NULL, 0) = %s\n",
fd, req->nlh.nlmsg_len, NLM_F_DUMP,
(unsigned) sizeof(req->nlh), sprintrc(rc));
/* nlmsg_len > whole message length */
req->nlh.nlmsg_len = sizeof(*req) + 8;
rc = sendto(fd, req, sizeof(*req), MSG_DONTWAIT, NULL, 0);
printf("sendto(%d, [{nlmsg_len=%u, nlmsg_type=NLMSG_NOOP"
", nlmsg_flags=NLM_F_REQUEST|0x%x"
", nlmsg_seq=0, nlmsg_pid=0}, \"\\x61\\x62\\x63\\x64\"]"
", %u, MSG_DONTWAIT, NULL, 0) = %s\n",
fd, req->nlh.nlmsg_len, NLM_F_DUMP,
(unsigned) sizeof(*req), sprintrc(rc));
/* nlmsg_len < sizeof(struct nlmsghdr) */
req->nlh.nlmsg_len = 8;
rc = sendto(fd, req, sizeof(*req), MSG_DONTWAIT, NULL, 0);
printf("sendto(%d, {nlmsg_len=%u, nlmsg_type=NLMSG_NOOP"
", nlmsg_flags=NLM_F_REQUEST|0x%x"
", nlmsg_seq=0, nlmsg_pid=0}, %u, MSG_DONTWAIT, NULL, 0) = %s\n",
fd, req->nlh.nlmsg_len, NLM_F_DUMP,
(unsigned) sizeof(*req), sprintrc(rc));
/* a sequence of two nlmsg objects */
struct reqs {
struct req req1;
char padding[NLMSG_ALIGN(sizeof(struct req)) - sizeof(struct req)];
struct req req2;
};
TAIL_ALLOC_OBJECT_CONST_PTR(struct reqs, reqs);
memcpy(&reqs->req1, &c_req, sizeof(c_req));
memcpy(&reqs->req2, &c_req, sizeof(c_req));
rc = sendto(fd, reqs, sizeof(*reqs), MSG_DONTWAIT, NULL, 0);
printf("sendto(%d, [[{nlmsg_len=%u, nlmsg_type=NLMSG_NOOP"
", nlmsg_flags=NLM_F_REQUEST|0x%x"
", nlmsg_seq=0, nlmsg_pid=0}, \"\\x61\\x62\\x63\\x64\"]"
", [{nlmsg_len=%u, nlmsg_type=NLMSG_NOOP"
", nlmsg_flags=NLM_F_REQUEST|0x%x"
", nlmsg_seq=0, nlmsg_pid=0}, \"\\x61\\x62\\x63\\x64\"]]"
", %u, MSG_DONTWAIT, NULL, 0) = %s\n",
fd, reqs->req1.nlh.nlmsg_len, NLM_F_DUMP,
reqs->req2.nlh.nlmsg_len, NLM_F_DUMP,
(unsigned) sizeof(*reqs), sprintrc(rc));
/* unfetchable second struct nlmsghdr */
void *const efault2 = tail_memdup(&reqs->req1, sizeof(reqs->req1));
rc = sendto(fd, efault2, sizeof(*reqs), MSG_DONTWAIT, NULL, 0);
printf("sendto(%d, [[{nlmsg_len=%u, nlmsg_type=NLMSG_NOOP"
", nlmsg_flags=NLM_F_REQUEST|0x%x"
", nlmsg_seq=0, nlmsg_pid=0}, \"\\x61\\x62\\x63\\x64\"]"
", ... /* %p */], %u, MSG_DONTWAIT, NULL, 0) = %s\n",
fd, reqs->req1.nlh.nlmsg_len, NLM_F_DUMP,
&((struct reqs *) efault2)->req2, (unsigned) sizeof(*reqs),
sprintrc(rc));
/* message length is not enough for the second struct nlmsghdr */
rc = sendto(fd, reqs, sizeof(*reqs) - sizeof(req->nlh), MSG_DONTWAIT,
NULL, 0);
errstr = sprintrc(rc);
printf("sendto(%d, [[{nlmsg_len=%u, nlmsg_type=NLMSG_NOOP"
", nlmsg_flags=NLM_F_REQUEST|0x%x"
", nlmsg_seq=0, nlmsg_pid=0}, \"\\x61\\x62\\x63\\x64\"], ",
fd, reqs->req1.nlh.nlmsg_len, NLM_F_DUMP);
print_quoted_hex(&reqs->req2.nlh,
sizeof(reqs->req2) - sizeof(req->nlh));
printf("], %u, MSG_DONTWAIT, NULL, 0) = %s\n",
(unsigned) (sizeof(*reqs) - sizeof(req->nlh)), errstr);
/* second nlmsg_len < sizeof(struct nlmsghdr) */
reqs->req2.nlh.nlmsg_len = 4;
rc = sendto(fd, reqs, sizeof(*reqs), MSG_DONTWAIT, NULL, 0);
printf("sendto(%d, [[{nlmsg_len=%u, nlmsg_type=NLMSG_NOOP"
", nlmsg_flags=NLM_F_REQUEST|0x%x"
", nlmsg_seq=0, nlmsg_pid=0}, \"\\x61\\x62\\x63\\x64\"]"
", {nlmsg_len=%u, nlmsg_type=NLMSG_NOOP"
", nlmsg_flags=NLM_F_REQUEST|0x%x"
", nlmsg_seq=0, nlmsg_pid=0}], %u, MSG_DONTWAIT, NULL, 0) = %s\n",
fd, reqs->req1.nlh.nlmsg_len, NLM_F_DUMP,
reqs->req2.nlh.nlmsg_len, NLM_F_DUMP,
(unsigned) sizeof(*reqs), sprintrc(rc));
/* abbreviated output */
# define ABBREV_LEN (DEFAULT_STRLEN + 1)
const unsigned int msg_len = sizeof(struct nlmsghdr) * ABBREV_LEN;
struct nlmsghdr *const msgs = tail_alloc(msg_len);
for (unsigned int i = 0; i < ABBREV_LEN; ++i) {
msgs[i].nlmsg_len = sizeof(*msgs);
msgs[i].nlmsg_type = NLMSG_NOOP;
msgs[i].nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST;
msgs[i].nlmsg_seq = i;
msgs[i].nlmsg_pid = 0;
}
rc = sendto(fd, msgs, msg_len, MSG_DONTWAIT, NULL, 0);
errstr = sprintrc(rc);
printf("sendto(%d, [", fd);
for (unsigned int i = 0; i < DEFAULT_STRLEN; ++i) {
if (i)
printf(", ");
printf("{nlmsg_len=%u, nlmsg_type=NLMSG_NOOP"
", nlmsg_flags=NLM_F_REQUEST|0x%x"
", nlmsg_seq=%u, nlmsg_pid=0}",
msgs[i].nlmsg_len, NLM_F_DUMP, msgs[i].nlmsg_seq);
}
printf(", ...], %u, MSG_DONTWAIT, NULL, 0) = %s\n", msg_len, errstr);
}
static void
test_nlmsgerr(const int fd)
{
struct nlmsgerr *err;
struct nlmsghdr *nlh;
void *const nlh0 = midtail_alloc(NLMSG_HDRLEN, sizeof(*err) + 4);
long rc;
const char *rcstr;
/* error message with nlmsg_len exceeding the allocated room */
nlh = nlh0;
nlh->nlmsg_len = NLMSG_HDRLEN + 4;
nlh->nlmsg_type = NLMSG_ERROR;
nlh->nlmsg_flags = NLM_F_REQUEST;
nlh->nlmsg_seq = 0;
nlh->nlmsg_pid = 0;
rc = sendto(fd, nlh, nlh->nlmsg_len, MSG_DONTWAIT, NULL, 0);
printf("sendto(%d, [{nlmsg_len=%u, nlmsg_type=NLMSG_ERROR"
", nlmsg_flags=NLM_F_REQUEST, nlmsg_seq=0, nlmsg_pid=0}"
", %p], %u, MSG_DONTWAIT, NULL, 0) = %s\n",
fd, nlh->nlmsg_len, nlh0 + NLMSG_HDRLEN,
nlh->nlmsg_len, sprintrc(rc));
/* error message without enough room for the error code */
nlh->nlmsg_len = NLMSG_HDRLEN + 2;
nlh = nlh0 - 2;
memmove(nlh, nlh0, sizeof(*nlh));
memcpy(NLMSG_DATA(nlh), "42", 2);
rc = sendto(fd, nlh, NLMSG_HDRLEN + 2, MSG_DONTWAIT, NULL, 0);
printf("sendto(%d, [{nlmsg_len=%u, nlmsg_type=NLMSG_ERROR"
", nlmsg_flags=NLM_F_REQUEST, nlmsg_seq=0, nlmsg_pid=0}"
", \"\\x34\\x32\"], %u, MSG_DONTWAIT, NULL, 0) = %s\n",
fd, NLMSG_HDRLEN + 2, NLMSG_HDRLEN + 2, sprintrc(rc));
/* error message with room for the error code only */
nlh = nlh0 - sizeof(err->error);
nlh->nlmsg_len = NLMSG_HDRLEN + sizeof(err->error);
nlh->nlmsg_type = NLMSG_ERROR;
nlh->nlmsg_flags = NLM_F_REQUEST;
nlh->nlmsg_seq = 0;
nlh->nlmsg_pid = 0;
err = NLMSG_DATA(nlh);
fill_memory(&err->error, sizeof(err->error));
rc = sendto(fd, nlh, nlh->nlmsg_len, MSG_DONTWAIT, NULL, 0);
rcstr = sprintrc(rc);
printf("sendto(%d, [{nlmsg_len=%u, nlmsg_type=NLMSG_ERROR"
", nlmsg_flags=NLM_F_REQUEST, nlmsg_seq=0, nlmsg_pid=0}, ",
fd, nlh->nlmsg_len);
print_quoted_hex(&err->error, sizeof(err->error));
printf("], %u, MSG_DONTWAIT, NULL, 0) = %s\n", nlh->nlmsg_len, rcstr);
/* error message without enough room for the whole struct nlmsgerr */
nlh = nlh0 - (sizeof(*err) - 4);
nlh->nlmsg_len = NLMSG_HDRLEN + (sizeof(*err) - 4);
nlh->nlmsg_type = NLMSG_ERROR;
nlh->nlmsg_flags = NLM_F_REQUEST;
nlh->nlmsg_seq = 0;
nlh->nlmsg_pid = 0;
err = NLMSG_DATA(nlh);
fill_memory(err, sizeof(*err) - 4);
rc = sendto(fd, nlh, nlh->nlmsg_len, MSG_DONTWAIT, NULL, 0);
rcstr = sprintrc(rc);
printf("sendto(%d, [{nlmsg_len=%u, nlmsg_type=NLMSG_ERROR"
", nlmsg_flags=NLM_F_REQUEST, nlmsg_seq=0, nlmsg_pid=0}, ",
fd, nlh->nlmsg_len);
print_quoted_hex(err, sizeof(*err) - 4);
printf("], %u, MSG_DONTWAIT, NULL, 0) = %s\n", nlh->nlmsg_len, rcstr);
/* error message with nlmsg_len exceeding the allocated room */
nlh->nlmsg_len = NLMSG_HDRLEN + sizeof(*err);
rc = sendto(fd, nlh, nlh->nlmsg_len, MSG_DONTWAIT, NULL, 0);
printf("sendto(%d, [{nlmsg_len=%u, nlmsg_type=NLMSG_ERROR"
", nlmsg_flags=NLM_F_REQUEST, nlmsg_seq=0, nlmsg_pid=0}"
", %p], %u, MSG_DONTWAIT, NULL, 0) = %s\n",
fd, nlh->nlmsg_len, err, nlh->nlmsg_len, sprintrc(rc));
/* error message with room for the error code and a header */
nlh = nlh0 - sizeof(*err);
nlh->nlmsg_len = NLMSG_HDRLEN + sizeof(*err);
nlh->nlmsg_type = NLMSG_ERROR;
nlh->nlmsg_flags = NLM_F_REQUEST;
nlh->nlmsg_seq = 0;
nlh->nlmsg_pid = 0;
err = NLMSG_DATA(nlh);
err->error = -13;
err->msg.nlmsg_len = NLMSG_HDRLEN;
err->msg.nlmsg_type = NLMSG_NOOP;
err->msg.nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST;
err->msg.nlmsg_seq = 42;
err->msg.nlmsg_pid = 1234;
rc = sendto(fd, nlh, nlh->nlmsg_len, MSG_DONTWAIT, NULL, 0);
printf("sendto(%d, [{nlmsg_len=%u, nlmsg_type=NLMSG_ERROR"
", nlmsg_flags=NLM_F_REQUEST, nlmsg_seq=0, nlmsg_pid=0}"
", {error=-EACCES, msg={nlmsg_len=%u, nlmsg_type=NLMSG_NOOP"
", nlmsg_flags=NLM_F_REQUEST|0x%x, nlmsg_seq=%u, nlmsg_pid=%d}}]"
", %u, MSG_DONTWAIT, NULL, 0) = %s\n",
fd, nlh->nlmsg_len, err->msg.nlmsg_len, NLM_F_DUMP,
err->msg.nlmsg_seq, err->msg.nlmsg_pid,
nlh->nlmsg_len, sprintrc(rc));
/* err->msg.nlmsg_len < sizeof(err->msg) */
err->msg.nlmsg_len = sizeof(err->msg.nlmsg_len);
rc = sendto(fd, nlh, nlh->nlmsg_len, MSG_DONTWAIT, NULL, 0);
printf("sendto(%d, [{nlmsg_len=%u, nlmsg_type=NLMSG_ERROR"
", nlmsg_flags=NLM_F_REQUEST, nlmsg_seq=0, nlmsg_pid=0}"
", {error=-EACCES, msg={nlmsg_len=%u, nlmsg_type=NLMSG_NOOP"
", nlmsg_flags=NLM_F_REQUEST|0x%x, nlmsg_seq=%u, nlmsg_pid=%d}}]"
", %u, MSG_DONTWAIT, NULL, 0) = %s\n",
fd, nlh->nlmsg_len, err->msg.nlmsg_len, NLM_F_DUMP,
err->msg.nlmsg_seq, err->msg.nlmsg_pid,
nlh->nlmsg_len, sprintrc(rc));
/* nlh->nlmsg_len < NLMSG_HDRLEN + err->msg.nlmsg_len */
err->msg.nlmsg_len = NLMSG_HDRLEN + 4;
rc = sendto(fd, nlh, nlh->nlmsg_len, MSG_DONTWAIT, NULL, 0);
printf("sendto(%d, [{nlmsg_len=%u, nlmsg_type=NLMSG_ERROR"
", nlmsg_flags=NLM_F_REQUEST, nlmsg_seq=0, nlmsg_pid=0}"
", {error=-EACCES, msg={nlmsg_len=%u, nlmsg_type=NLMSG_NOOP"
", nlmsg_flags=NLM_F_REQUEST|0x%x, nlmsg_seq=%u, nlmsg_pid=%d}}]"
", %u, MSG_DONTWAIT, NULL, 0) = %s\n",
fd, nlh->nlmsg_len, err->msg.nlmsg_len, NLM_F_DUMP,
err->msg.nlmsg_seq, err->msg.nlmsg_pid,
nlh->nlmsg_len, sprintrc(rc));
/* error message with room for the error code, a header, and some data */
nlh = nlh0 - sizeof(*err) - 4;
nlh->nlmsg_len = NLMSG_HDRLEN + sizeof(*err) + 4;
nlh->nlmsg_type = NLMSG_ERROR;
nlh->nlmsg_flags = NLM_F_REQUEST;
nlh->nlmsg_seq = 0;
nlh->nlmsg_pid = 0;
err = NLMSG_DATA(nlh);
err->error = -13;
err->msg.nlmsg_len = NLMSG_HDRLEN + 4;
err->msg.nlmsg_type = NLMSG_NOOP;
err->msg.nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST;
err->msg.nlmsg_seq = 421;
err->msg.nlmsg_pid = 12345;
memcpy(NLMSG_DATA(&err->msg), "abcd", 4);
rc = sendto(fd, nlh, nlh->nlmsg_len, MSG_DONTWAIT, NULL, 0);
printf("sendto(%d, [{nlmsg_len=%u, nlmsg_type=NLMSG_ERROR"
", nlmsg_flags=NLM_F_REQUEST, nlmsg_seq=0, nlmsg_pid=0}"
", {error=-EACCES, msg=[{nlmsg_len=%u, nlmsg_type=NLMSG_NOOP"
", nlmsg_flags=NLM_F_REQUEST|0x%x, nlmsg_seq=%u, nlmsg_pid=%d}"
", \"\\x61\\x62\\x63\\x64\"]}], %u, MSG_DONTWAIT, NULL, 0)"
" = %s\n",
fd, nlh->nlmsg_len, err->msg.nlmsg_len, NLM_F_DUMP,
err->msg.nlmsg_seq, err->msg.nlmsg_pid,
nlh->nlmsg_len, sprintrc(rc));
nlh->nlmsg_len = NLMSG_HDRLEN + sizeof(*err) + 1;
err->msg.nlmsg_len = NLMSG_HDRLEN + 1;
err->msg.nlmsg_type = SOCK_DIAG_BY_FAMILY;
err->msg.nlmsg_flags = NLM_F_REQUEST;
err->msg.nlmsg_seq = 4213;
err->msg.nlmsg_pid = 123456;
memcpy(NLMSG_DATA(&err->msg), "", 1);
rc = sendto(fd, nlh, nlh->nlmsg_len, MSG_DONTWAIT, NULL, 0);
printf("sendto(%d, [{nlmsg_len=%u, nlmsg_type=NLMSG_ERROR"
", nlmsg_flags=NLM_F_REQUEST, nlmsg_seq=0, nlmsg_pid=0}"
", {error=-EACCES, msg=[{nlmsg_len=%u"
", nlmsg_type=SOCK_DIAG_BY_FAMILY, nlmsg_flags=NLM_F_REQUEST"
", nlmsg_seq=%u, nlmsg_pid=%d}, {family=AF_UNSPEC}]}]"
", %u, MSG_DONTWAIT, NULL, 0) = %s\n",
fd, nlh->nlmsg_len, err->msg.nlmsg_len,
err->msg.nlmsg_seq, err->msg.nlmsg_pid,
nlh->nlmsg_len, sprintrc(rc));
}
static void
test_nlmsg_done(const int fd)
{
struct nlmsghdr *nlh;
const int num = 0xfacefeed;
void *const nlh0 = midtail_alloc(NLMSG_HDRLEN, sizeof(num));
long rc;
/* NLMSG_DONE message without enough room for an integer payload */
nlh = nlh0;
*nlh = (struct nlmsghdr) {
.nlmsg_len = NLMSG_HDRLEN + sizeof(num),
.nlmsg_type = NLMSG_DONE,
.nlmsg_flags = NLM_F_MULTI
};
rc = sendto(fd, nlh, nlh->nlmsg_len, MSG_DONTWAIT, NULL, 0);
printf("sendto(%d, [{nlmsg_len=%u, nlmsg_type=NLMSG_DONE"
", nlmsg_flags=NLM_F_MULTI, nlmsg_seq=0, nlmsg_pid=0}, %p]"
", %u, MSG_DONTWAIT, NULL, 0) = %s\n",
fd, nlh->nlmsg_len, nlh0 + NLMSG_HDRLEN,
nlh->nlmsg_len, sprintrc(rc));
/* NLMSG_DONE message with enough room for an oddly short payload */
nlh->nlmsg_len = NLMSG_HDRLEN + 2;
nlh = nlh0 - 2;
/* Beware of unaligned access to nlh members. */
memmove(nlh, nlh0, sizeof(*nlh));
memcpy(NLMSG_DATA(nlh), "42", 2);
rc = sendto(fd, nlh, NLMSG_HDRLEN + 2, MSG_DONTWAIT, NULL, 0);
printf("sendto(%d, [{nlmsg_len=%u, nlmsg_type=NLMSG_DONE"
", nlmsg_flags=NLM_F_MULTI, nlmsg_seq=0, nlmsg_pid=0}"
", \"\\x34\\x32\"], %u, MSG_DONTWAIT, NULL, 0) = %s\n",
fd, NLMSG_HDRLEN + 2, NLMSG_HDRLEN + 2, sprintrc(rc));
/* NLMSG_DONE message with enough room for an integer payload */
nlh = nlh0 - sizeof(num);
*nlh = (struct nlmsghdr) {
.nlmsg_len = NLMSG_HDRLEN + sizeof(num),
.nlmsg_type = NLMSG_DONE,
.nlmsg_flags = NLM_F_MULTI
};
memcpy(NLMSG_DATA(nlh), &num, sizeof(num));
rc = sendto(fd, nlh, nlh->nlmsg_len, MSG_DONTWAIT, NULL, 0);
printf("sendto(%d, [{nlmsg_len=%u, nlmsg_type=NLMSG_DONE"
", nlmsg_flags=NLM_F_MULTI, nlmsg_seq=0, nlmsg_pid=0}, %d]"
", %u, MSG_DONTWAIT, NULL, 0) = %s\n",
fd, nlh->nlmsg_len, num, nlh->nlmsg_len, sprintrc(rc));
}
static void
test_ack_flags(const int fd)
{
long rc;
struct nlmsghdr nlh = {
.nlmsg_len = sizeof(nlh),
.nlmsg_type = NLMSG_ERROR,
};
nlh.nlmsg_flags = NLM_F_REQUEST | NLM_F_CAPPED,
rc = sendto(fd, &nlh, sizeof(nlh), MSG_DONTWAIT, NULL, 0);
printf("sendto(%d, {nlmsg_len=%u, nlmsg_type=NLMSG_ERROR"
", nlmsg_flags=NLM_F_REQUEST|NLM_F_CAPPED, nlmsg_seq=0"
", nlmsg_pid=0}, %u, MSG_DONTWAIT, NULL, 0) = %s\n",
fd, nlh.nlmsg_len, (unsigned) sizeof(nlh), sprintrc(rc));
nlh.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK_TLVS;
rc = sendto(fd, &nlh, sizeof(nlh), MSG_DONTWAIT, NULL, 0);
printf("sendto(%d, {nlmsg_len=%u, nlmsg_type=NLMSG_ERROR"
", nlmsg_flags=NLM_F_REQUEST|NLM_F_ACK_TLVS, nlmsg_seq=0"
", nlmsg_pid=0}, %u, MSG_DONTWAIT, NULL, 0) = %s\n",
fd, nlh.nlmsg_len, (unsigned) sizeof(nlh), sprintrc(rc));
nlh.nlmsg_flags = NLM_F_REQUEST | NLM_F_CAPPED | NLM_F_ACK_TLVS;
rc = sendto(fd, &nlh, sizeof(nlh), MSG_DONTWAIT, NULL, 0);
printf("sendto(%d, {nlmsg_len=%u, nlmsg_type=NLMSG_ERROR"
", nlmsg_flags=NLM_F_REQUEST|NLM_F_CAPPED|NLM_F_ACK_TLVS"
", nlmsg_seq=0, nlmsg_pid=0}, %u, MSG_DONTWAIT, NULL, 0) = %s\n",
fd, nlh.nlmsg_len, (unsigned) sizeof(nlh), sprintrc(rc));
}
int main(void)
{
const int fd = create_nl_socket(NETLINK_SOCK_DIAG);
char *path = xasprintf("/proc/self/fd/%u", fd);
char buf[256];
if (getxattr(path, "system.sockprotoname", buf, sizeof(buf) - 1) < 0)
perror_msg_and_skip("getxattr");
free(path);
send_query(fd);
test_nlmsgerr(fd);
test_nlmsg_done(fd);
test_ack_flags(fd);
puts("+++ exited with 0 +++");
return 0;
}
#else
SKIP_MAIN_UNDEFINED("HAVE_SYS_XATTR_H")
#endif
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