1/*-
2 * Copyright (c) 2017 Hartmut Brandt <harti@FreeBSD.org>
3 * Copyright (c) 2017 Gleb Smirnoff <glebius@FreeBSD.org>
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 *
27 * $FreeBSD$
28 */
29
30#include <sys/types.h>
31#include <sys/socket.h>
32#include <sys/event.h>
33#include <sys/filio.h>
34#include <sys/ioctl.h>
35#include <netinet/in.h>
36#include <err.h>
37#include <stdio.h>
38#include <string.h>
39#include <unistd.h>
40
41/*
42 * This regression test is against a scenario when a socket is first added
43 * to a kqueue, and only then is put into listening state.
44 * This weird scenario was made a valid one in r313043, and shouldn't be
45 * broken later.
46 */
47
48int
49main()
50{
51	struct sockaddr_in addr;
52	struct kevent ev[2];
53	socklen_t socklen;
54	int kq, sock, opt, pid, nev, fd;
55
56	if ((kq = kqueue()) == -1)
57		err(1, "kqueue");
58
59	if ((sock = socket(PF_INET, SOCK_STREAM, 0)) == -1)
60		err(1, "socket");
61
62	EV_SET(&ev[0], sock, EVFILT_READ, EV_ADD | EV_CLEAR, 0, 0, NULL);
63	EV_SET(&ev[1], sock, EVFILT_WRITE, EV_ADD | EV_CLEAR, 0, 0, NULL);
64
65	opt = 1;
66	if (setsockopt(sock, SOL_SOCKET, SO_NOSIGPIPE, &opt, sizeof(opt)) == -1)
67		err(1, "setsockopt");
68
69	if (kevent(kq, ev, 2, NULL, 0, NULL) == -1)
70	    err(1, "kevent");
71
72	if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)) == -1)
73		err(1, "setsockopt");
74
75	memset(&addr, 0, sizeof(addr));
76	addr.sin_family = AF_INET;
77	addr.sin_port = htons(10000);
78
79	if (bind(sock, (struct sockaddr *)&addr, sizeof(addr)) == -1)
80		err(1, "bind");
81	if (listen(sock, 0x80) == -1)
82		err(1, "listen");
83
84	if (ioctl(sock, FIONBIO, &opt) == -1)
85		err(1, "ioctl(FIONBIO)");
86
87	if (kevent(kq, ev, 2, NULL, 0, NULL) == -1)
88		err(1, "kevent");
89
90	pid = fork();
91	if (pid == -1)
92		err(1, "fork");
93	if (pid == 0) {
94		if (close(sock) == -1)
95			err(1, "close");
96		if ((sock = socket(PF_INET, SOCK_STREAM, 0)) == -1)
97			err(1, "socket");
98		if (connect(sock, (struct sockaddr *)&addr, sizeof(addr)) == -1)
99			err(1, "connect");
100	} else {
101		nev = kevent(kq, NULL, 0, ev, 2, NULL);
102		if (nev < 1)
103			err(1, "kevent");
104		for (int i = 0; i < nev; ++i) {
105			if (ev[i].ident == (uintptr_t )sock) {
106				fd = accept(ev[i].ident,
107				    (struct sockaddr *)&addr, &socklen);
108				if (fd == -1)
109					err(1, "accept");
110				printf("OK\n");
111			}
112		}
113	}
114}
115