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