/*
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* This file is part of net-yy-unix strace test.
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*
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* Copyright (c) 2014-2016 Dmitry V. Levin <ldv@altlinux.org>
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* Copyright (c) 2014-2018 The strace developers.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "tests.h"
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#include <assert.h>
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#include <errno.h>
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#include <stddef.h>
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#include <stdint.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/socket.h>
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#include <sys/un.h>
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#include "netlink.h"
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#include <linux/sock_diag.h>
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#include <linux/unix_diag.h>
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static void
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send_query(const int fd)
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{
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struct sockaddr_nl nladdr = {
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.nl_family = AF_NETLINK
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};
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struct {
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struct nlmsghdr nlh;
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struct unix_diag_req udr;
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} req = {
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.nlh = {
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.nlmsg_len = sizeof(req),
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.nlmsg_type = SOCK_DIAG_BY_FAMILY,
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.nlmsg_flags = NLM_F_REQUEST | NLM_F_DUMP
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},
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.udr = {
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.sdiag_family = AF_UNIX,
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.udiag_states = -1,
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.udiag_show = UDIAG_SHOW_NAME | UDIAG_SHOW_PEER
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}
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};
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struct iovec iov = {
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.iov_base = &req,
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.iov_len = sizeof(req)
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};
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struct msghdr msg = {
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.msg_name = (void *) &nladdr,
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.msg_namelen = sizeof(nladdr),
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.msg_iov = &iov,
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.msg_iovlen = 1
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};
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if (sendmsg(fd, &msg, 0) <= 0)
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perror_msg_and_skip("sendmsg");
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}
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static void
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check_responses(const int fd)
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{
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static union {
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struct nlmsghdr hdr;
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long buf[8192 / sizeof(long)];
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} hdr_buf;
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struct sockaddr_nl nladdr = {
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.nl_family = AF_NETLINK
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};
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struct iovec iov = {
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.iov_base = hdr_buf.buf,
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.iov_len = sizeof(hdr_buf.buf)
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};
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struct msghdr msg = {
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.msg_name = (void *) &nladdr,
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.msg_namelen = sizeof(nladdr),
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.msg_iov = &iov,
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.msg_iovlen = 1
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};
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ssize_t ret = recvmsg(fd, &msg, 0);
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if (ret <= 0)
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perror_msg_and_skip("recvmsg");
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struct nlmsghdr *h = &hdr_buf.hdr;
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if (!is_nlmsg_ok(h, ret))
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error_msg_and_skip("!is_nlmsg_ok");
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if (h->nlmsg_type == NLMSG_ERROR) {
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const struct nlmsgerr *err = NLMSG_DATA(h);
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if (h->nlmsg_len < NLMSG_LENGTH(sizeof(*err)))
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error_msg_and_skip("NLMSG_ERROR");
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errno = -err->error;
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perror_msg_and_skip("NLMSG_ERROR");
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}
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if (h->nlmsg_type != SOCK_DIAG_BY_FAMILY)
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error_msg_and_skip("unexpected nlmsg_type %u",
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(unsigned) h->nlmsg_type);
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const struct unix_diag_msg *diag = NLMSG_DATA(h);
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if (h->nlmsg_len < NLMSG_LENGTH(sizeof(*diag)))
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error_msg_and_skip("short response");
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}
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#define SUN_PATH "netlink_unix_diag_socket"
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int main(void)
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{
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struct sockaddr_un addr = {
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.sun_family = AF_UNIX,
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.sun_path = SUN_PATH
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};
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socklen_t len = offsetof(struct sockaddr_un, sun_path) + sizeof(SUN_PATH);
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close(0);
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close(1);
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(void) unlink(SUN_PATH);
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if (socket(AF_UNIX, SOCK_STREAM, 0))
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perror_msg_and_skip("socket AF_UNIX");
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if (bind(0, (struct sockaddr *) &addr, len))
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perror_msg_and_skip("bind");
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if (listen(0, 5))
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perror_msg_and_skip("listen");
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assert(unlink(SUN_PATH) == 0);
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if (socket(AF_NETLINK, SOCK_RAW, NETLINK_SOCK_DIAG) != 1)
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perror_msg_and_skip("socket AF_NETLINK");
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send_query(1);
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check_responses(1);
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return 0;
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}
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