1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2022 Gleb Smirnoff <[email protected]>
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
28 #include <sys/socket.h>
29 #include <netinet/in.h>
30 #include <errno.h>
31 #include <fcntl.h>
32
33 #include <atf-c.h>
34
35 static int
listensock(struct sockaddr_in * sin)36 listensock(struct sockaddr_in *sin)
37 {
38 int l;
39
40 ATF_REQUIRE((l = socket(PF_INET, SOCK_STREAM, 0)) > 0);
41 ATF_REQUIRE(fcntl(l, F_SETFL, O_NONBLOCK) != -1);
42 ATF_REQUIRE(setsockopt(l, SOL_SOCKET, SO_REUSEADDR, &(socklen_t){1},
43 sizeof(int)) == 0);
44 *sin = (struct sockaddr_in){
45 .sin_len = sizeof(sin),
46 .sin_family = AF_INET,
47 .sin_addr.s_addr = htonl(INADDR_LOOPBACK),
48 };
49 ATF_REQUIRE(bind(l, (struct sockaddr *)sin, sizeof(*sin)) == 0);
50 ATF_REQUIRE(getsockname(l, (struct sockaddr *)sin,
51 &(socklen_t){ sizeof(*sin) }) == 0);
52 ATF_REQUIRE(listen(l, -1) == 0);
53
54 return (l);
55 }
56
57 static int
clientsock(struct sockaddr_in * sin)58 clientsock(struct sockaddr_in *sin)
59 {
60 int s;
61
62 ATF_REQUIRE((s = socket(PF_INET, SOCK_STREAM, 0)) > 0);
63 ATF_REQUIRE(connect(s, (struct sockaddr *)sin, sizeof(*sin)) == 0);
64
65 return (s);
66 }
67
68 static void
accfon(int l,struct accept_filter_arg * af)69 accfon(int l, struct accept_filter_arg *af)
70 {
71
72 if (setsockopt(l, SOL_SOCKET, SO_ACCEPTFILTER, af, sizeof(*af)) != 0) {
73 if (errno == ENOENT)
74 atf_tc_skip("Accept filter %s not loaded in kernel",
75 af->af_name);
76 else
77 atf_tc_fail("setsockopt(SO_ACCEPTFILTER): %s",
78 strerror(errno));
79 }
80 }
81
82 /*
83 * XXX: return from send(2) on a localhost connection doesn't guarantee that
84 * netisr has fully processed and delivered the data to the remote local
85 * socket. Sleep a fraction of second to "guarantee" that it did.
86 */
87 static ssize_t
usend(int s,const void * msg,size_t len)88 usend(int s, const void *msg, size_t len)
89 {
90 ssize_t rv;
91
92 rv = send(s, msg, len, 0);
93 usleep(100000);
94 return (rv);
95 }
96
97 ATF_TC_WITHOUT_HEAD(data);
ATF_TC_BODY(data,tc)98 ATF_TC_BODY(data, tc)
99 {
100 struct accept_filter_arg afa = {
101 .af_name = "dataready"
102 };
103 struct sockaddr_in sin;
104 int l, s, a;
105
106 l = listensock(&sin);
107 accfon(l, &afa);
108 s = clientsock(&sin);
109 ATF_REQUIRE(accept(l, NULL, 0) == -1);
110 ATF_REQUIRE(errno == EAGAIN);
111 ATF_REQUIRE(usend(s, "foo", sizeof("foo")) == sizeof("foo"));
112 ATF_REQUIRE((a = accept(l, NULL, 0)) > 0);
113 }
114
115 ATF_TC_WITHOUT_HEAD(http);
ATF_TC_BODY(http,tc)116 ATF_TC_BODY(http, tc)
117 {
118 struct accept_filter_arg afa = {
119 .af_name = "httpready"
120 };
121 struct sockaddr_in sin;
122 int l, s, a;
123
124 l = listensock(&sin);
125 accfon(l, &afa);
126 s = clientsock(&sin);
127
128 /* 1) No data. */
129 ATF_REQUIRE(accept(l, NULL, 0) == -1);
130 ATF_REQUIRE(errno == EAGAIN);
131
132 /* 2) Data, that doesn't look like HTTP. */
133 ATF_REQUIRE(usend(s, "foo", sizeof("foo")) == sizeof("foo"));
134 ATF_REQUIRE((a = accept(l, NULL, 0)) > 0);
135
136 close(s);
137 close(a);
138
139 #define CHUNK1 "GET / "
140 #define CHUNK2 "HTTP/1.0\r\n\n"
141 #define LEN(c) (sizeof(c) - 1)
142
143 /* 3) Partial HTTP. */
144 s = clientsock(&sin);
145 ATF_REQUIRE(usend(s, CHUNK1, LEN(CHUNK1)) == LEN(CHUNK1));
146 ATF_REQUIRE(accept(l, NULL, 0) == -1);
147 ATF_REQUIRE(errno == EAGAIN);
148
149 /* 4) Complete HTTP. */
150 ATF_REQUIRE(usend(s, CHUNK2, LEN(CHUNK2)) == LEN(CHUNK2));
151 ATF_REQUIRE((a = accept(l, NULL, 0)) > 0);
152 }
153
ATF_TP_ADD_TCS(tp)154 ATF_TP_ADD_TCS(tp)
155 {
156 ATF_TP_ADD_TC(tp, data);
157 ATF_TP_ADD_TC(tp, http);
158
159 return (atf_no_error());
160 }
161