1// SPDX-License-Identifier: GPL-2.0
2/* Copyright Amazon.com Inc. or its affiliates. */
3
4#include <sys/socket.h>
5#include <netinet/in.h>
6
7#include "../kselftest_harness.h"
8
9struct in6_addr in6addr_v4mapped_any = {
10	.s6_addr = {
11		0, 0, 0, 0,
12		0, 0, 0, 0,
13		0, 0, 255, 255,
14		0, 0, 0, 0
15	}
16};
17
18struct in6_addr in6addr_v4mapped_loopback = {
19	.s6_addr = {
20		0, 0, 0, 0,
21		0, 0, 0, 0,
22		0, 0, 255, 255,
23		127, 0, 0, 1
24	}
25};
26
27FIXTURE(bind_wildcard)
28{
29	struct sockaddr_in addr4;
30	struct sockaddr_in6 addr6;
31};
32
33FIXTURE_VARIANT(bind_wildcard)
34{
35	const __u32 addr4_const;
36	const struct in6_addr *addr6_const;
37	int expected_errno;
38};
39
40FIXTURE_VARIANT_ADD(bind_wildcard, v4_any_v6_any)
41{
42	.addr4_const = INADDR_ANY,
43	.addr6_const = &in6addr_any,
44	.expected_errno = EADDRINUSE,
45};
46
47FIXTURE_VARIANT_ADD(bind_wildcard, v4_any_v6_local)
48{
49	.addr4_const = INADDR_ANY,
50	.addr6_const = &in6addr_loopback,
51	.expected_errno = 0,
52};
53
54FIXTURE_VARIANT_ADD(bind_wildcard, v4_any_v6_v4mapped_any)
55{
56	.addr4_const = INADDR_ANY,
57	.addr6_const = &in6addr_v4mapped_any,
58	.expected_errno = EADDRINUSE,
59};
60
61FIXTURE_VARIANT_ADD(bind_wildcard, v4_any_v6_v4mapped_local)
62{
63	.addr4_const = INADDR_ANY,
64	.addr6_const = &in6addr_v4mapped_loopback,
65	.expected_errno = EADDRINUSE,
66};
67
68FIXTURE_VARIANT_ADD(bind_wildcard, v4_local_v6_any)
69{
70	.addr4_const = INADDR_LOOPBACK,
71	.addr6_const = &in6addr_any,
72	.expected_errno = EADDRINUSE,
73};
74
75FIXTURE_VARIANT_ADD(bind_wildcard, v4_local_v6_local)
76{
77	.addr4_const = INADDR_LOOPBACK,
78	.addr6_const = &in6addr_loopback,
79	.expected_errno = 0,
80};
81
82FIXTURE_VARIANT_ADD(bind_wildcard, v4_local_v6_v4mapped_any)
83{
84	.addr4_const = INADDR_LOOPBACK,
85	.addr6_const = &in6addr_v4mapped_any,
86	.expected_errno = EADDRINUSE,
87};
88
89FIXTURE_VARIANT_ADD(bind_wildcard, v4_local_v6_v4mapped_local)
90{
91	.addr4_const = INADDR_LOOPBACK,
92	.addr6_const = &in6addr_v4mapped_loopback,
93	.expected_errno = EADDRINUSE,
94};
95
96FIXTURE_SETUP(bind_wildcard)
97{
98	self->addr4.sin_family = AF_INET;
99	self->addr4.sin_port = htons(0);
100	self->addr4.sin_addr.s_addr = htonl(variant->addr4_const);
101
102	self->addr6.sin6_family = AF_INET6;
103	self->addr6.sin6_port = htons(0);
104	self->addr6.sin6_addr = *variant->addr6_const;
105}
106
107FIXTURE_TEARDOWN(bind_wildcard)
108{
109}
110
111void bind_sockets(struct __test_metadata *_metadata,
112		  FIXTURE_DATA(bind_wildcard) *self,
113		  int expected_errno,
114		  struct sockaddr *addr1, socklen_t addrlen1,
115		  struct sockaddr *addr2, socklen_t addrlen2)
116{
117	int fd[2];
118	int ret;
119
120	fd[0] = socket(addr1->sa_family, SOCK_STREAM, 0);
121	ASSERT_GT(fd[0], 0);
122
123	ret = bind(fd[0], addr1, addrlen1);
124	ASSERT_EQ(ret, 0);
125
126	ret = getsockname(fd[0], addr1, &addrlen1);
127	ASSERT_EQ(ret, 0);
128
129	((struct sockaddr_in *)addr2)->sin_port = ((struct sockaddr_in *)addr1)->sin_port;
130
131	fd[1] = socket(addr2->sa_family, SOCK_STREAM, 0);
132	ASSERT_GT(fd[1], 0);
133
134	ret = bind(fd[1], addr2, addrlen2);
135	if (expected_errno) {
136		ASSERT_EQ(ret, -1);
137		ASSERT_EQ(errno, expected_errno);
138	} else {
139		ASSERT_EQ(ret, 0);
140	}
141
142	close(fd[1]);
143	close(fd[0]);
144}
145
146TEST_F(bind_wildcard, v4_v6)
147{
148	bind_sockets(_metadata, self, variant->expected_errno,
149		     (struct sockaddr *)&self->addr4, sizeof(self->addr4),
150		     (struct sockaddr *)&self->addr6, sizeof(self->addr6));
151}
152
153TEST_F(bind_wildcard, v6_v4)
154{
155	bind_sockets(_metadata, self, variant->expected_errno,
156		     (struct sockaddr *)&self->addr6, sizeof(self->addr6),
157		     (struct sockaddr *)&self->addr4, sizeof(self->addr4));
158}
159
160TEST_HARNESS_MAIN
161