path: root/tools/testing/selftests/net/bind_wildcard.c

// SPDX-License-Identifier: GPL-2.0
/* Copyright Amazon.com Inc. or its affiliates. */

#include <sys/socket.h>
#include <netinet/in.h>

#include "kselftest_harness.h"

static const __u32 in4addr_any = INADDR_ANY;
static const __u32 in4addr_loopback = INADDR_LOOPBACK;
static const struct in6_addr in6addr_v4mapped_any = {
	.s6_addr = {
		0, 0, 0, 0,
		0, 0, 0, 0,
		0, 0, 255, 255,
		0, 0, 0, 0
	}
};
static const struct in6_addr in6addr_v4mapped_loopback = {
	.s6_addr = {
		0, 0, 0, 0,
		0, 0, 0, 0,
		0, 0, 255, 255,
		127, 0, 0, 1
	}
};

#define NR_SOCKETS 8

FIXTURE(bind_wildcard)
{
	int fd[NR_SOCKETS];
	socklen_t addrlen[NR_SOCKETS];
	union {
		struct sockaddr addr;
		struct sockaddr_in addr4;
		struct sockaddr_in6 addr6;
	} addr[NR_SOCKETS];
};

FIXTURE_VARIANT(bind_wildcard)
{
	sa_family_t family[2];
	const void *addr[2];
	bool ipv6_only[2];

	/* 6 bind() calls below follow two bind() for the defined 2 addresses:
	 *
	 *   0.0.0.0
	 *   127.0.0.1
	 *   ::
	 *   ::1
	 *   ::ffff:0.0.0.0
	 *   ::ffff:127.0.0.1
	 */
	int expected_errno[NR_SOCKETS];
	int expected_reuse_errno[NR_SOCKETS];
};

/* (IPv4, IPv4) */
FIXTURE_VARIANT_ADD(bind_wildcard, v4_any_v4_local)
{
	.family = {AF_INET, AF_INET},
	.addr = {&in4addr_any, &in4addr_loopback},
	.expected_errno = {0, EADDRINUSE,
			   EADDRINUSE, EADDRINUSE,
			   EADDRINUSE, 0,
			   EADDRINUSE, EADDRINUSE},
	.expected_reuse_errno = {0, 0,
				 EADDRINUSE, EADDRINUSE,
				 EADDRINUSE, 0,
				 EADDRINUSE, EADDRINUSE},
};

FIXTURE_VARIANT_ADD(bind_wildcard, v4_local_v4_any)
{
	.family = {AF_INET, AF_INET},
	.addr = {&in4addr_loopback, &in4addr_any},
	.expected_errno = {0, EADDRINUSE,
			   EADDRINUSE, EADDRINUSE,
			   EADDRINUSE, 0,
			   EADDRINUSE, EADDRINUSE},
	.expected_reuse_errno = {0, 0,
				 EADDRINUSE, EADDRINUSE,
				 EADDRINUSE, 0,
				 EADDRINUSE, EADDRINUSE},
};

/* (IPv4, IPv6) */
FIXTURE_VARIANT_ADD(bind_wildcard, v4_any_v6_any)
{
	.family = {AF_INET, AF_INET6},
	.addr = {&in4addr_any, &in6addr_any},
	.expected_errno = {0, EADDRINUSE,
			   EADDRINUSE, EADDRINUSE,
			   EADDRINUSE, 0,
			   EADDRINUSE, EADDRINUSE},
	.expected_reuse_errno = {0, 0,
				 EADDRINUSE, EADDRINUSE,
				 EADDRINUSE, EADDRINUSE,
				 EADDRINUSE, EADDRINUSE},
};

FIXTURE_VARIANT_ADD(bind_wildcard, v4_any_v6_any_only)
{
	.family = {AF_INET, AF_INET6},
	.addr = {&in4addr_any, &in6addr_any},
	.ipv6_only = {false, true},
	.expected_errno = {0, 0,
			   EADDRINUSE, EADDRINUSE,
			   EADDRINUSE, EADDRINUSE,
			   EADDRINUSE, EADDRINUSE},
	.expected_reuse_errno = {0, 0,
				 EADDRINUSE, EADDRINUSE,
				 EADDRINUSE, EADDRINUSE,
				 EADDRINUSE, EADDRINUSE},
};

FIXTURE_VARIANT_ADD(bind_wildcard, v4_any_v6_local)
{
	.family = {AF_INET, AF_INET6},
	.addr = {&in4addr_any, &in6addr_loopback},
	.expected_errno = {0, 0,
			   EADDRINUSE, EADDRINUSE,
			   EADDRINUSE, EADDRINUSE,
			   EADDRINUSE, EADDRINUSE},
	.expected_reuse_errno = {0, 0,
				 EADDRINUSE, EADDRINUSE,
				 EADDRINUSE, EADDRINUSE,
				 EADDRINUSE, EADDRINUSE},
};

FIXTURE_VARIANT_ADD(bind_wildcard, v4_any_v6_v4mapped_any)
{
	.family = {AF_INET, AF_INET6},
	.addr = {&in4addr_any, &in6addr_v4mapped_any},
	.expected_errno = {0, EADDRINUSE,
			   EADDRINUSE, EADDRINUSE,
			   EADDRINUSE, 0,
			   EADDRINUSE, EADDRINUSE},
	.expected_reuse_errno = {0, 0,
				 EADDRINUSE, EADDRINUSE,
				 EADDRINUSE, 0,
				 EADDRINUSE, EADDRINUSE},
};

FIXTURE_VARIANT_ADD(bind_wildcard, v4_any_v6_v4mapped_local)
{
	.family = {AF_INET, AF_INET6},
	.addr = {&in4addr_any, &in6addr_v4mapped_loopback},
	.expected_errno = {0, EADDRINUSE,
			   EADDRINUSE, EADDRINUSE,
			   EADDRINUSE, 0,
			   EADDRINUSE, EADDRINUSE},
	.expected_reuse_errno = {0, 0,
				 EADDRINUSE, EADDRINUSE,
				 EADDRINUSE, 0,
				 EADDRINUSE, EADDRINUSE},
};

FIXTURE_VARIANT_ADD(bind_wildcard, v4_local_v6_any)
{
	.family = {AF_INET, AF_INET6},
	.addr = {&in4addr_loopback, &in6addr_any},
	.expected_errno = {0, EADDRINUSE,
			   EADDRINUSE, EADDRINUSE,
			   EADDRINUSE, 0,
			   EADDRINUSE, EADDRINUSE},
	.expected_reuse_errno = {0, 0,
				 EADDRINUSE, EADDRINUSE,
				 EADDRINUSE, EADDRINUSE,
				 EADDRINUSE, EADDRINUSE},
};