[PATCH v1 net 0/8] tcp: Fix bind() regression and more tests.

[PATCH v1 net 0/8] tcp: Fix bind() regression and more tests.

[Kuniyuki Iwashima]

bhash2 has not been well tested for IPV6_V6ONLY option.

This series fixes two regression around IPV6_V6ONLY, one of which
has been there since bhash2 introduction, and another is introduced
by a recent change.

Also, this series adds as many tests as possible to catch regression
easily.  The baseline is 28044fc1d495~ which is pre-bhash2 commit.

 Tested on 28044fc1d495~:
  # PASSED: 132 / 132 tests passed.
  # Totals: pass:132 fail:0 xfail:0 xpass:0 skip:0 error:0

 net.git:
  # FAILED: 125 / 132 tests passed.
  # Totals: pass:125 fail:7 xfail:0 xpass:0 skip:0 error:0

 With this series:
  # PASSED: 132 / 132 tests passed.
  # Totals: pass:132 fail:0 xfail:0 xpass:0 skip:0 error:0


Kuniyuki Iwashima (8):
  tcp: Fix bind() regression for v6-only wildcard and v4-mapped-v6
    non-wildcard addresses.
  tcp: Fix bind() regression for v6-only wildcard and v4(-mapped-v6)
    non-wildcard addresses.
  selftest: tcp: Make bind() selftest flexible.
  selftest: tcp: Define the reverse order bind() tests explicitly.
  selftest: tcp: Add v4-v4 and v6-v6 bind() conflict tests.
  selftest: tcp: Add more bind() calls.
  selftest: tcp: Add bind() tests for IPV6_V6ONLY.
  selftest: tcp: Add bind() tests for SO_REUSEADDR/SO_REUSEPORT.

 net/ipv4/inet_connection_sock.c             |  22 +-
 tools/testing/selftests/net/bind_wildcard.c | 783 ++++++++++++++++++--
 2 files changed, 729 insertions(+), 76 deletions(-)

-- 
2.30.2

[PATCH v1 net 1/8] tcp: Fix bind() regression for v6-only wildcard and v4-mapped-v6 non-wildcard addresses.

[Kuniyuki Iwashima]

Commit 5e07e672412b ("tcp: Use bhash2 for v4-mapped-v6 non-wildcard
address.") introduced bind() regression for v4-mapped-v6 address.

When we bind() the following two addresses on the same port, the 2nd
bind() should succeed but fails now.

  1. [::] w/ IPV6_ONLY
  2. ::ffff:127.0.0.1

After the chagne, v4-mapped-v6 uses bhash2 instead of bhash to
detect conflict faster, but I forgot to add a necessary change.

During the 2nd bind(), inet_bind2_bucket_match_addr_any() returns
the tb2 bucket of [::], and inet_bhash2_conflict() finally calls
inet_bind_conflict(), which returns true, meaning conflict.

  inet_bhash2_addr_any_conflict
  |- inet_bind2_bucket_match_addr_any  <-- return [::] bucket
  `- inet_bhash2_conflict
     `- __inet_bhash2_conflict <-- checks IPV6_ONLY for AF_INET
        |                          but not for v4-mapped-v6 address
        `- inet_bind_conflict  <-- does not check address

inet_bind_conflict() does not check socket addresses because
__inet_bhash2_conflict() is expected to do so.

However, it checks IPV6_V6ONLY attribute only against AF_INET
socket, and not for v4-mapped-v6 address.

As a result, v4-mapped-v6 address conflicts with v6-only wildcard
address.

To avoid that, let's add the missing test to use bhash2 for
v4-mapped-v6 address.

Fixes: 5e07e672412b ("tcp: Use bhash2 for v4-mapped-v6 non-wildcard address.")
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
---
 net/ipv4/inet_connection_sock.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/ipv4/inet_connection_sock.c b/net/ipv4/inet_connection_sock.c
index 7d8090f109ef..612aa1d2eff7 100644
--- a/net/ipv4/inet_connection_sock.c
+++ b/net/ipv4/inet_connection_sock.c
@@ -203,7 +203,8 @@ static bool __inet_bhash2_conflict(const struct sock *sk, struct sock *sk2,
 				   kuid_t sk_uid, bool relax,
 				   bool reuseport_cb_ok, bool reuseport_ok)
 {
-	if (sk->sk_family == AF_INET && ipv6_only_sock(sk2))
+	if (ipv6_only_sock(sk2) &&
+	    (sk->sk_family == AF_INET || ipv6_addr_v4mapped(&sk->sk_v6_rcv_saddr)))
 		return false;
 
 	return inet_bind_conflict(sk, sk2, sk_uid, relax,
-- 
2.30.2

Re: [PATCH v1 net 1/8] tcp: Fix bind() regression for v6-only wildcard and v4-mapped-v6 non-wildcard addresses.

[Jakub Kicinski]

On Mon, 25 Mar 2024 11:19:16 -0700 Kuniyuki Iwashima wrote:
> -	if (sk->sk_family == AF_INET && ipv6_only_sock(sk2))
> +	if (ipv6_only_sock(sk2) &&
> +	    (sk->sk_family == AF_INET || ipv6_addr_v4mapped(&sk->sk_v6_rcv_saddr)))

breaks build for IPV6=n (i.e. TDC):

https://github.com/p4tc-dev/tc-executor/commit/ac16181d7589bdf29c7c3907243e829f6b954570#diff-0042f6af11ac801c4370fb95b8e4f0de734b793c9e23bff936a1bb03c63eb6f0R228
-- 
pw-bot: cr

Re: [PATCH v1 net 1/8] tcp: Fix bind() regression for v6-only wildcard and v4-mapped-v6 non-wildcard addresses.

[Kuniyuki Iwashima]

From: Jakub Kicinski <kuba@kernel.org>
Date: Mon, 25 Mar 2024 16:56:33 -0700
> On Mon, 25 Mar 2024 11:19:16 -0700 Kuniyuki Iwashima wrote:
> > -	if (sk->sk_family == AF_INET && ipv6_only_sock(sk2))
> > +	if (ipv6_only_sock(sk2) &&
> > +	    (sk->sk_family == AF_INET || ipv6_addr_v4mapped(&sk->sk_v6_rcv_saddr)))
> 
> breaks build for IPV6=n (i.e. TDC):
> 
> https://github.com/p4tc-dev/tc-executor/commit/ac16181d7589bdf29c7c3907243e829f6b954570#diff-0042f6af11ac801c4370fb95b8e4f0de734b793c9e23bff936a1bb03c63eb6f0R228

Oops, will fix it in v2.

Thanks!

Re: [PATCH v1 net 1/8] tcp: Fix bind() regression for v6-only wildcard and v4-mapped-v6 non-wildcard addresses.

[kernel test robot]

Hi Kuniyuki,

kernel test robot noticed the following build errors:

[auto build test ERROR on net/main]

url:    https://github.com/intel-lab-lkp/linux/commits/Kuniyuki-Iwashima/tcp-Fix-bind-regression-for-v6-only-wildcard-and-v4-mapped-v6-non-wildcard-addresses/20240326-024257
base:   net/main
patch link:    https://lore.kernel.org/r/20240325181923.48769-2-kuniyu%40amazon.com
patch subject: [PATCH v1 net 1/8] tcp: Fix bind() regression for v6-only wildcard and v4-mapped-v6 non-wildcard addresses.
config: alpha-defconfig (https://download.01.org/0day-ci/archive/20240326/202403261847.wj7EwLat-lkp@intel.com/config)
compiler: alpha-linux-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240326/202403261847.wj7EwLat-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202403261847.wj7EwLat-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from include/net/inet_sock.h:22,
                    from include/net/inet_connection_sock.h:21,
                    from net/ipv4/inet_connection_sock.c:15:
   net/ipv4/inet_connection_sock.c: In function '__inet_bhash2_conflict':
>> include/net/sock.h:375:37: error: 'const struct sock_common' has no member named 'skc_v6_rcv_saddr'; did you mean 'skc_rcv_saddr'?
     375 | #define sk_v6_rcv_saddr __sk_common.skc_v6_rcv_saddr
         |                                     ^~~~~~~~~~~~~~~~
   net/ipv4/inet_connection_sock.c:207:66: note: in expansion of macro 'sk_v6_rcv_saddr'
     207 |             (sk->sk_family == AF_INET || ipv6_addr_v4mapped(&sk->sk_v6_rcv_saddr)))
         |                                                                  ^~~~~~~~~~~~~~~


vim +375 include/net/sock.h

4dc6dc7162c08b Eric Dumazet             2009-07-15  354  
68835aba4d9b74 Eric Dumazet             2010-11-30  355  #define sk_dontcopy_begin	__sk_common.skc_dontcopy_begin
68835aba4d9b74 Eric Dumazet             2010-11-30  356  #define sk_dontcopy_end		__sk_common.skc_dontcopy_end
4dc6dc7162c08b Eric Dumazet             2009-07-15  357  #define sk_hash			__sk_common.skc_hash
5080546682bae3 Eric Dumazet             2013-10-02  358  #define sk_portpair		__sk_common.skc_portpair
05dbc7b59481ca Eric Dumazet             2013-10-03  359  #define sk_num			__sk_common.skc_num
05dbc7b59481ca Eric Dumazet             2013-10-03  360  #define sk_dport		__sk_common.skc_dport
5080546682bae3 Eric Dumazet             2013-10-02  361  #define sk_addrpair		__sk_common.skc_addrpair
5080546682bae3 Eric Dumazet             2013-10-02  362  #define sk_daddr		__sk_common.skc_daddr
5080546682bae3 Eric Dumazet             2013-10-02  363  #define sk_rcv_saddr		__sk_common.skc_rcv_saddr
^1da177e4c3f41 Linus Torvalds           2005-04-16  364  #define sk_family		__sk_common.skc_family
^1da177e4c3f41 Linus Torvalds           2005-04-16  365  #define sk_state		__sk_common.skc_state
^1da177e4c3f41 Linus Torvalds           2005-04-16  366  #define sk_reuse		__sk_common.skc_reuse
055dc21a1d1d21 Tom Herbert              2013-01-22  367  #define sk_reuseport		__sk_common.skc_reuseport
9fe516ba3fb29b Eric Dumazet             2014-06-27  368  #define sk_ipv6only		__sk_common.skc_ipv6only
26abe14379f8e2 Eric W. Biederman        2015-05-08  369  #define sk_net_refcnt		__sk_common.skc_net_refcnt
^1da177e4c3f41 Linus Torvalds           2005-04-16  370  #define sk_bound_dev_if		__sk_common.skc_bound_dev_if
^1da177e4c3f41 Linus Torvalds           2005-04-16  371  #define sk_bind_node		__sk_common.skc_bind_node
8feaf0c0a5488b Arnaldo Carvalho de Melo 2005-08-09  372  #define sk_prot			__sk_common.skc_prot
07feaebfcc10cd Eric W. Biederman        2007-09-12  373  #define sk_net			__sk_common.skc_net
efe4208f47f907 Eric Dumazet             2013-10-03  374  #define sk_v6_daddr		__sk_common.skc_v6_daddr
efe4208f47f907 Eric Dumazet             2013-10-03 @375  #define sk_v6_rcv_saddr	__sk_common.skc_v6_rcv_saddr
33cf7c90fe2f97 Eric Dumazet             2015-03-11  376  #define sk_cookie		__sk_common.skc_cookie
70da268b569d32 Eric Dumazet             2015-10-08  377  #define sk_incoming_cpu		__sk_common.skc_incoming_cpu
8e5eb54d303b7c Eric Dumazet             2015-10-08  378  #define sk_flags		__sk_common.skc_flags
ed53d0ab761f5c Eric Dumazet             2015-10-08  379  #define sk_rxhash		__sk_common.skc_rxhash
efe4208f47f907 Eric Dumazet             2013-10-03  380  
5d4cc87414c5d1 Eric Dumazet             2024-02-16  381  	__cacheline_group_begin(sock_write_rx);
43f51df4172955 Eric Dumazet             2021-11-15  382  
9115e8cd2a0c6e Eric Dumazet             2016-12-03  383  	atomic_t		sk_drops;
5d4cc87414c5d1 Eric Dumazet             2024-02-16  384  	__s32			sk_peek_off;
9115e8cd2a0c6e Eric Dumazet             2016-12-03  385  	struct sk_buff_head	sk_error_queue;
b178bb3dfc30d9 Eric Dumazet             2010-11-16  386  	struct sk_buff_head	sk_receive_queue;
fa438ccfdfd3f6 Eric Dumazet             2007-03-04  387  	/*
fa438ccfdfd3f6 Eric Dumazet             2007-03-04  388  	 * The backlog queue is special, it is always used with
fa438ccfdfd3f6 Eric Dumazet             2007-03-04  389  	 * the per-socket spinlock held and requires low latency
fa438ccfdfd3f6 Eric Dumazet             2007-03-04  390  	 * access. Therefore we special case it's implementation.
b178bb3dfc30d9 Eric Dumazet             2010-11-16  391  	 * Note : rmem_alloc is in this structure to fill a hole
b178bb3dfc30d9 Eric Dumazet             2010-11-16  392  	 * on 64bit arches, not because its logically part of
b178bb3dfc30d9 Eric Dumazet             2010-11-16  393  	 * backlog.
fa438ccfdfd3f6 Eric Dumazet             2007-03-04  394  	 */
fa438ccfdfd3f6 Eric Dumazet             2007-03-04  395  	struct {
b178bb3dfc30d9 Eric Dumazet             2010-11-16  396  		atomic_t	rmem_alloc;
b178bb3dfc30d9 Eric Dumazet             2010-11-16  397  		int		len;
fa438ccfdfd3f6 Eric Dumazet             2007-03-04  398  		struct sk_buff	*head;
fa438ccfdfd3f6 Eric Dumazet             2007-03-04  399  		struct sk_buff	*tail;
fa438ccfdfd3f6 Eric Dumazet             2007-03-04  400  	} sk_backlog;
b178bb3dfc30d9 Eric Dumazet             2010-11-16  401  #define sk_rmem_alloc sk_backlog.rmem_alloc
2c8c56e15df3d4 Eric Dumazet             2014-11-11  402  
5d4cc87414c5d1 Eric Dumazet             2024-02-16  403  	__cacheline_group_end(sock_write_rx);
5d4cc87414c5d1 Eric Dumazet             2024-02-16  404  
5d4cc87414c5d1 Eric Dumazet             2024-02-16  405  	__cacheline_group_begin(sock_read_rx);
5d4cc87414c5d1 Eric Dumazet             2024-02-16  406  	/* early demux fields */
5d4cc87414c5d1 Eric Dumazet             2024-02-16  407  	struct dst_entry __rcu	*sk_rx_dst;
5d4cc87414c5d1 Eric Dumazet             2024-02-16  408  	int			sk_rx_dst_ifindex;
5d4cc87414c5d1 Eric Dumazet             2024-02-16  409  	u32			sk_rx_dst_cookie;
5d4cc87414c5d1 Eric Dumazet             2024-02-16  410  

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki

Re: [PATCH v1 net 1/8] tcp: Fix bind() regression for v6-only wildcard and v4-mapped-v6 non-wildcard addresses.

[kernel test robot]

Hi Kuniyuki,

kernel test robot noticed the following build errors:

[auto build test ERROR on net/main]

url:    https://github.com/intel-lab-lkp/linux/commits/Kuniyuki-Iwashima/tcp-Fix-bind-regression-for-v6-only-wildcard-and-v4-mapped-v6-non-wildcard-addresses/20240326-024257
base:   net/main
patch link:    https://lore.kernel.org/r/20240325181923.48769-2-kuniyu%40amazon.com
patch subject: [PATCH v1 net 1/8] tcp: Fix bind() regression for v6-only wildcard and v4-mapped-v6 non-wildcard addresses.
config: x86_64-kexec (https://download.01.org/0day-ci/archive/20240326/202403261821.5fkObY55-lkp@intel.com/config)
compiler: clang version 17.0.6 (https://github.com/llvm/llvm-project 6009708b4367171ccdbf4b5905cb6a803753fe18)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240326/202403261821.5fkObY55-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202403261821.5fkObY55-lkp@intel.com/

All errors (new ones prefixed by >>):

>> net/ipv4/inet_connection_sock.c:207:59: error: no member named 'skc_v6_rcv_saddr' in 'struct sock_common'; did you mean 'skc_rcv_saddr'?
     207 |             (sk->sk_family == AF_INET || ipv6_addr_v4mapped(&sk->sk_v6_rcv_saddr)))
         |                                                                  ^
   include/net/sock.h:375:37: note: expanded from macro 'sk_v6_rcv_saddr'
     375 | #define sk_v6_rcv_saddr __sk_common.skc_v6_rcv_saddr
         |                                     ^
   include/net/sock.h:155:11: note: 'skc_rcv_saddr' declared here
     155 |                         __be32  skc_rcv_saddr;
         |                                 ^
   1 error generated.


vim +207 net/ipv4/inet_connection_sock.c

   201	
   202	static bool __inet_bhash2_conflict(const struct sock *sk, struct sock *sk2,
   203					   kuid_t sk_uid, bool relax,
   204					   bool reuseport_cb_ok, bool reuseport_ok)
   205	{
   206		if (ipv6_only_sock(sk2) &&
 > 207		    (sk->sk_family == AF_INET || ipv6_addr_v4mapped(&sk->sk_v6_rcv_saddr)))
   208			return false;
   209	
   210		return inet_bind_conflict(sk, sk2, sk_uid, relax,
   211					  reuseport_cb_ok, reuseport_ok);
   212	}
   213	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki

[PATCH v1 net 2/8] tcp: Fix bind() regression for v6-only wildcard and v4(-mapped-v6) non-wildcard addresses.

[Kuniyuki Iwashima]

Jianguo Wu reported another bind() regression introduced by bhash2.

Calling bind() for the following 3 addresses on the same port, the
3rd one should fail but now succeeds.

  1. 0.0.0.0 or ::ffff:0.0.0.0
  2. [::] w/ IPV6_V6ONLY
  3. IPv4 non-wildcard address or v4-mapped-v6 non-wildcard address

The first two bind() create tb2 like this:

  bhash2 -> tb2(:: w/ IPV6_V6ONLY) -> tb2(0.0.0.0)

The 3rd bind() will match with the IPv6 only wildcard address bucket
in inet_bind2_bucket_match_addr_any(), however, no conflicting socket
exists in the bucket.  So, inet_bhash2_conflict() will returns false,
and thus, inet_bhash2_addr_any_conflict() returns false consequently.

As a result, the 3rd bind() bypasses conflict check, which should be
done against the IPv4 wildcard address bucket.

So, in inet_bhash2_addr_any_conflict(), we must iterate over all buckets.

Note that we cannot add ipv6_only flag for inet_bind2_bucket as it
would confuse the following patetrn.

  1. [::] w/ SO_REUSE{ADDR,PORT} and IPV6_V6ONLY
  2. [::] w/ SO_REUSE{ADDR,PORT}
  3. IPv4 non-wildcard address or v4-mapped-v6 non-wildcard address

The first bind() would create a bucket with ipv6_only flag true,
the second bind() would add the [::] socket into the same bucket,
and the third bind() could succeed based on the wrong assumption
that ipv6_only bucket would not conflict with v4(-mapped-v6) address.

Fixes: 28044fc1d495 ("net: Add a bhash2 table hashed by port and address")
Diagnosed-by: Jianguo Wu <wujianguo106@163.com>
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
---
 net/ipv4/inet_connection_sock.c | 19 +++++++++++--------
 1 file changed, 11 insertions(+), 8 deletions(-)

diff --git a/net/ipv4/inet_connection_sock.c b/net/ipv4/inet_connection_sock.c
index 612aa1d2eff7..63e8f2df0681 100644
--- a/net/ipv4/inet_connection_sock.c
+++ b/net/ipv4/inet_connection_sock.c
@@ -288,6 +288,7 @@ static bool inet_bhash2_addr_any_conflict(const struct sock *sk, int port, int l
 	struct sock_reuseport *reuseport_cb;
 	struct inet_bind_hashbucket *head2;
 	struct inet_bind2_bucket *tb2;
+	bool conflict = false;
 	bool reuseport_cb_ok;
 
 	rcu_read_lock();
@@ -300,18 +301,20 @@ static bool inet_bhash2_addr_any_conflict(const struct sock *sk, int port, int l
 
 	spin_lock(&head2->lock);
 
-	inet_bind_bucket_for_each(tb2, &head2->chain)
-		if (inet_bind2_bucket_match_addr_any(tb2, net, port, l3mdev, sk))
-			break;
+	inet_bind_bucket_for_each(tb2, &head2->chain) {
+		if (!inet_bind2_bucket_match_addr_any(tb2, net, port, l3mdev, sk))
+			continue;
 
-	if (tb2 && inet_bhash2_conflict(sk, tb2, uid, relax, reuseport_cb_ok,
-					reuseport_ok)) {
-		spin_unlock(&head2->lock);
-		return true;
+		if (!inet_bhash2_conflict(sk, tb2, uid, relax, reuseport_cb_ok,	reuseport_ok))
+			continue;
+
+		conflict = true;
+		break;
 	}
 
 	spin_unlock(&head2->lock);
-	return false;
+
+	return conflict;
 }
 
 /*
-- 
2.30.2

[PATCH v1 net 3/8] selftest: tcp: Make bind() selftest flexible.

[Kuniyuki Iwashima]

Currently, bind_wildcard.c tests only (IPv4, IPv6) pairs, but we will
add more tests for the same protocol pairs.

This patch makes it possible by changing the address pointer to void.

No functional changes are intended.

Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
---
 tools/testing/selftests/net/bind_wildcard.c | 92 +++++++++++++--------
 1 file changed, 58 insertions(+), 34 deletions(-)

diff --git a/tools/testing/selftests/net/bind_wildcard.c b/tools/testing/selftests/net/bind_wildcard.c
index a2662348cdb1..d65c3bb6ba13 100644
--- a/tools/testing/selftests/net/bind_wildcard.c
+++ b/tools/testing/selftests/net/bind_wildcard.c
@@ -6,7 +6,9 @@
 
 #include "../kselftest_harness.h"
 
-struct in6_addr in6addr_v4mapped_any = {
+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,
@@ -14,8 +16,7 @@ struct in6_addr in6addr_v4mapped_any = {
 		0, 0, 0, 0
 	}
 };
-
-struct in6_addr in6addr_v4mapped_loopback = {
+static const struct in6_addr in6addr_v4mapped_loopback = {
 	.s6_addr = {
 		0, 0, 0, 0,
 		0, 0, 0, 0,
@@ -26,82 +27,105 @@ struct in6_addr in6addr_v4mapped_loopback = {
 
 FIXTURE(bind_wildcard)
 {
-	struct sockaddr_in addr4;
-	struct sockaddr_in6 addr6;
+	socklen_t addrlen[2];
+	union {
+		struct sockaddr addr;
+		struct sockaddr_in addr4;
+		struct sockaddr_in6 addr6;
+	} addr[2];
 };
 
 FIXTURE_VARIANT(bind_wildcard)
 {
-	const __u32 addr4_const;
-	const struct in6_addr *addr6_const;
+	sa_family_t family[2];
+	const void *addr[2];
 	int expected_errno;
 };
 
 FIXTURE_VARIANT_ADD(bind_wildcard, v4_any_v6_any)
 {
-	.addr4_const = INADDR_ANY,
-	.addr6_const = &in6addr_any,
+	.family = {AF_INET, AF_INET6},
+	.addr = {&in4addr_any, &in6addr_any},
 	.expected_errno = EADDRINUSE,
 };
 
 FIXTURE_VARIANT_ADD(bind_wildcard, v4_any_v6_local)
 {
-	.addr4_const = INADDR_ANY,
-	.addr6_const = &in6addr_loopback,
+	.family = {AF_INET, AF_INET6},
+	.addr = {&in4addr_any, &in6addr_loopback},
 	.expected_errno = 0,
 };
 
 FIXTURE_VARIANT_ADD(bind_wildcard, v4_any_v6_v4mapped_any)
 {
-	.addr4_const = INADDR_ANY,
-	.addr6_const = &in6addr_v4mapped_any,
+	.family = {AF_INET, AF_INET6},
+	.addr = {&in4addr_any, &in6addr_v4mapped_any},
 	.expected_errno = EADDRINUSE,
 };
 
 FIXTURE_VARIANT_ADD(bind_wildcard, v4_any_v6_v4mapped_local)
 {
-	.addr4_const = INADDR_ANY,
-	.addr6_const = &in6addr_v4mapped_loopback,
+	.family = {AF_INET, AF_INET6},
+	.addr = {&in4addr_any, &in6addr_v4mapped_loopback},
 	.expected_errno = EADDRINUSE,
 };
 
 FIXTURE_VARIANT_ADD(bind_wildcard, v4_local_v6_any)
 {
-	.addr4_const = INADDR_LOOPBACK,
-	.addr6_const = &in6addr_any,
+	.family = {AF_INET, AF_INET6},
+	.addr = {&in4addr_loopback, &in6addr_any},
 	.expected_errno = EADDRINUSE,
 };
 
 FIXTURE_VARIANT_ADD(bind_wildcard, v4_local_v6_local)
 {
-	.addr4_const = INADDR_LOOPBACK,
-	.addr6_const = &in6addr_loopback,
+	.family = {AF_INET, AF_INET6},
+	.addr = {&in4addr_loopback, &in6addr_loopback},
 	.expected_errno = 0,
 };
 
 FIXTURE_VARIANT_ADD(bind_wildcard, v4_local_v6_v4mapped_any)
 {
-	.addr4_const = INADDR_LOOPBACK,
-	.addr6_const = &in6addr_v4mapped_any,
+	.family = {AF_INET, AF_INET6},
+	.addr = {&in4addr_loopback, &in6addr_v4mapped_any},
 	.expected_errno = EADDRINUSE,
 };
 
 FIXTURE_VARIANT_ADD(bind_wildcard, v4_local_v6_v4mapped_local)
 {
-	.addr4_const = INADDR_LOOPBACK,
-	.addr6_const = &in6addr_v4mapped_loopback,
+	.family = {AF_INET, AF_INET6},
+	.addr = {&in4addr_loopback, &in6addr_v4mapped_loopback},
 	.expected_errno = EADDRINUSE,
 };
 
-FIXTURE_SETUP(bind_wildcard)
+static void setup_addr(FIXTURE_DATA(bind_wildcard) *self, int i,
+		       int family, const void *addr_const)
 {
-	self->addr4.sin_family = AF_INET;
-	self->addr4.sin_port = htons(0);
-	self->addr4.sin_addr.s_addr = htonl(variant->addr4_const);
+	if (family == AF_INET) {
+		struct sockaddr_in *addr4 = &self->addr[i].addr4;
+		const __u32 *addr4_const = addr_const;
+
+		addr4->sin_family = AF_INET;
+		addr4->sin_port = htons(0);
+		addr4->sin_addr.s_addr = htonl(*addr4_const);
+
+		self->addrlen[i] = sizeof(struct sockaddr_in);
+	} else {
+		struct sockaddr_in6 *addr6 = &self->addr[i].addr6;
+		const struct in6_addr *addr6_const = addr_const;
+
+		addr6->sin6_family = AF_INET6;
+		addr6->sin6_port = htons(0);
+		addr6->sin6_addr = *addr6_const;
 
-	self->addr6.sin6_family = AF_INET6;
-	self->addr6.sin6_port = htons(0);
-	self->addr6.sin6_addr = *variant->addr6_const;
+		self->addrlen[i] = sizeof(struct sockaddr_in6);
+	}
+}
+
+FIXTURE_SETUP(bind_wildcard)
+{
+	setup_addr(self, 0, variant->family[0], variant->addr[0]);
+	setup_addr(self, 1, variant->family[1], variant->addr[1]);
 }
 
 FIXTURE_TEARDOWN(bind_wildcard)
@@ -146,15 +170,15 @@ void bind_sockets(struct __test_metadata *_metadata,
 TEST_F(bind_wildcard, v4_v6)
 {
 	bind_sockets(_metadata, self, variant->expected_errno,
-		     (struct sockaddr *)&self->addr4, sizeof(self->addr4),
-		     (struct sockaddr *)&self->addr6, sizeof(self->addr6));
+		     &self->addr[0].addr, self->addrlen[0],
+		     &self->addr[1].addr, self->addrlen[1]);
 }
 
 TEST_F(bind_wildcard, v6_v4)
 {
 	bind_sockets(_metadata, self, variant->expected_errno,
-		     (struct sockaddr *)&self->addr6, sizeof(self->addr6),
-		     (struct sockaddr *)&self->addr4, sizeof(self->addr4));
+		     &self->addr[1].addr, self->addrlen[1],
+		     &self->addr[0].addr, self->addrlen[0]);
 }
 
 TEST_HARNESS_MAIN
-- 
2.30.2

[PATCH v1 net 4/8] selftest: tcp: Define the reverse order bind() tests explicitly.

[Kuniyuki Iwashima]

Currently, bind_wildcard.c calls bind() twice for two addresses and
checks the pre-defined errno against the 2nd call.  Also, the two
bind() calls are swapped to cover various patterns how bind buckets
are created.

However, only testing two addresses is insufficient to detect regression.
So, we will add more bind() calls, and then, we need to define different
errno for each bind() per test case.

As a prepartion, let's define the reverse order bind() test cases as
fixtures.

No functional changes are intended.

Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
---
 tools/testing/selftests/net/bind_wildcard.c | 67 ++++++++++++++++++---
 1 file changed, 59 insertions(+), 8 deletions(-)

diff --git a/tools/testing/selftests/net/bind_wildcard.c b/tools/testing/selftests/net/bind_wildcard.c
index d65c3bb6ba13..143aae383da3 100644
--- a/tools/testing/selftests/net/bind_wildcard.c
+++ b/tools/testing/selftests/net/bind_wildcard.c
@@ -42,6 +42,7 @@ FIXTURE_VARIANT(bind_wildcard)
 	int expected_errno;
 };
 
+/* (IPv4, IPv6) */
 FIXTURE_VARIANT_ADD(bind_wildcard, v4_any_v6_any)
 {
 	.family = {AF_INET, AF_INET6},
@@ -98,6 +99,63 @@ FIXTURE_VARIANT_ADD(bind_wildcard, v4_local_v6_v4mapped_local)
 	.expected_errno = EADDRINUSE,
 };
 
+/* (IPv6, IPv4) */
+FIXTURE_VARIANT_ADD(bind_wildcard, v6_any_v4_any)
+{
+	.family = {AF_INET6, AF_INET},
+	.addr = {&in6addr_any, &in4addr_any},
+	.expected_errno = EADDRINUSE,
+};
+
+FIXTURE_VARIANT_ADD(bind_wildcard, v6_any_v4_local)
+{
+	.family = {AF_INET6, AF_INET},
+	.addr = {&in6addr_any, &in4addr_loopback},
+	.expected_errno = EADDRINUSE,
+};
+
+FIXTURE_VARIANT_ADD(bind_wildcard, v6_local_v4_any)
+{
+	.family = {AF_INET6, AF_INET},
+	.addr = {&in6addr_loopback, &in4addr_any},
+	.expected_errno = 0,
+};
+
+FIXTURE_VARIANT_ADD(bind_wildcard, v6_local_v4_local)
+{
+	.family = {AF_INET6, AF_INET},
+	.addr = {&in6addr_loopback, &in4addr_loopback},
+	.expected_errno = 0,
+};
+
+FIXTURE_VARIANT_ADD(bind_wildcard, v6_v4mapped_any_v4_any)
+{
+	.family = {AF_INET6, AF_INET},
+	.addr = {&in6addr_v4mapped_any, &in4addr_any},
+	.expected_errno = EADDRINUSE,
+};
+
+FIXTURE_VARIANT_ADD(bind_wildcard, v6_v4mapped_any_v4_local)
+{
+	.family = {AF_INET6, AF_INET},
+	.addr = {&in6addr_v4mapped_any, &in4addr_loopback},
+	.expected_errno = EADDRINUSE,
+};
+
+FIXTURE_VARIANT_ADD(bind_wildcard, v6_v4mapped_local_v4_any)
+{
+	.family = {AF_INET6, AF_INET},
+	.addr = {&in6addr_v4mapped_loopback, &in4addr_any},
+	.expected_errno = EADDRINUSE,
+};
+
+FIXTURE_VARIANT_ADD(bind_wildcard, v6_v4mapped_local_v4_local)
+{
+	.family = {AF_INET6, AF_INET},
+	.addr = {&in6addr_v4mapped_loopback, &in4addr_loopback},
+	.expected_errno = EADDRINUSE,
+};
+
 static void setup_addr(FIXTURE_DATA(bind_wildcard) *self, int i,
 		       int family, const void *addr_const)
 {
@@ -167,18 +225,11 @@ void bind_sockets(struct __test_metadata *_metadata,
 	close(fd[0]);
 }
 
-TEST_F(bind_wildcard, v4_v6)
+TEST_F(bind_wildcard, plain)
 {
 	bind_sockets(_metadata, self, variant->expected_errno,
 		     &self->addr[0].addr, self->addrlen[0],
 		     &self->addr[1].addr, self->addrlen[1]);
 }
 
-TEST_F(bind_wildcard, v6_v4)
-{
-	bind_sockets(_metadata, self, variant->expected_errno,
-		     &self->addr[1].addr, self->addrlen[1],
-		     &self->addr[0].addr, self->addrlen[0]);
-}
-
 TEST_HARNESS_MAIN
-- 
2.30.2

[PATCH v1 net 5/8] selftest: tcp: Add v4-v4 and v6-v6 bind() conflict tests.

[Kuniyuki Iwashima]

We don't have bind() conflict tests for the same protocol pairs.

Let's add them except for the same address pair, which will be
covered by the following patch adding 6 more bind() calls for
each test case.

Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
---
 tools/testing/selftests/net/bind_wildcard.c | 100 ++++++++++++++++++++
 1 file changed, 100 insertions(+)

diff --git a/tools/testing/selftests/net/bind_wildcard.c b/tools/testing/selftests/net/bind_wildcard.c
index 143aae383da3..5100dd713a49 100644
--- a/tools/testing/selftests/net/bind_wildcard.c
+++ b/tools/testing/selftests/net/bind_wildcard.c
@@ -42,6 +42,21 @@ FIXTURE_VARIANT(bind_wildcard)
 	int expected_errno;
 };
 
+/* (IPv4, IPv4) */
+FIXTURE_VARIANT_ADD(bind_wildcard, v4_any_v4_local)
+{
+	.family = {AF_INET, AF_INET},
+	.addr = {&in4addr_any, &in4addr_loopback},
+	.expected_errno = EADDRINUSE,
+};
+
+FIXTURE_VARIANT_ADD(bind_wildcard, v4_local_v4_any)
+{
+	.family = {AF_INET, AF_INET},
+	.addr = {&in4addr_loopback, &in4addr_any},
+	.expected_errno = EADDRINUSE,
+};
+
 /* (IPv4, IPv6) */
 FIXTURE_VARIANT_ADD(bind_wildcard, v4_any_v6_any)
 {
@@ -156,6 +171,91 @@ FIXTURE_VARIANT_ADD(bind_wildcard, v6_v4mapped_local_v4_local)
 	.expected_errno = EADDRINUSE,
 };
 
+/* (IPv6, IPv6) */
+FIXTURE_VARIANT_ADD(bind_wildcard, v6_any_v6_local)
+{
+	.family = {AF_INET6, AF_INET6},
+	.addr = {&in6addr_any, &in6addr_loopback},
+	.expected_errno = EADDRINUSE,
+};
+
+FIXTURE_VARIANT_ADD(bind_wildcard, v6_any_v6_v4mapped_any)
+{
+	.family = {AF_INET6, AF_INET6},
+	.addr = {&in6addr_any, &in6addr_v4mapped_any},
+	.expected_errno = EADDRINUSE,
+};
+
+FIXTURE_VARIANT_ADD(bind_wildcard, v6_any_v6_v4mapped_local)
+{
+	.family = {AF_INET6, AF_INET6},
+	.addr = {&in6addr_any, &in6addr_v4mapped_loopback},
+	.expected_errno = EADDRINUSE,
+};
+
+FIXTURE_VARIANT_ADD(bind_wildcard, v6_local_v6_any)
+{
+	.family = {AF_INET6, AF_INET6},
+	.addr = {&in6addr_loopback, &in6addr_any},
+	.expected_errno = EADDRINUSE,
+};
+
+FIXTURE_VARIANT_ADD(bind_wildcard, v6_local_v6_v4mapped_any)
+{
+	.family = {AF_INET6, AF_INET6},
+	.addr = {&in6addr_loopback, &in6addr_v4mapped_any},
+	.expected_errno = 0,
+};
+
+FIXTURE_VARIANT_ADD(bind_wildcard, v6_local_v6_v4mapped_local)
+{
+	.family = {AF_INET6, AF_INET6},
+	.addr = {&in6addr_loopback, &in6addr_v4mapped_loopback},
+	.expected_errno = 0,
+};
+
+FIXTURE_VARIANT_ADD(bind_wildcard, v6_v4mapped_any_v6_any)
+{
+	.family = {AF_INET6, AF_INET6},
+	.addr = {&in6addr_v4mapped_any, &in6addr_any},
+	.expected_errno = EADDRINUSE,
+};
+
+FIXTURE_VARIANT_ADD(bind_wildcard, v6_v4mapped_any_v6_local)
+{
+	.family = {AF_INET6, AF_INET6},
+	.addr = {&in6addr_v4mapped_any, &in6addr_loopback},
+	.expected_errno = 0,
+};
+
+FIXTURE_VARIANT_ADD(bind_wildcard, v6_v4mapped_any_v6_v4mapped_local)
+{
+	.family = {AF_INET6, AF_INET6},
+	.addr = {&in6addr_v4mapped_any, &in6addr_v4mapped_loopback},
+	.expected_errno = EADDRINUSE,
+};
+
+FIXTURE_VARIANT_ADD(bind_wildcard, v6_v4mapped_loopback_v6_any)
+{
+	.family = {AF_INET6, AF_INET6},
+	.addr = {&in6addr_v4mapped_loopback, &in6addr_any},
+	.expected_errno = EADDRINUSE,
+};
+
+FIXTURE_VARIANT_ADD(bind_wildcard, v6_v4mapped_loopback_v6_local)
+{
+	.family = {AF_INET6, AF_INET6},
+	.addr = {&in6addr_v4mapped_loopback, &in6addr_loopback},
+	.expected_errno = 0,
+};
+
+FIXTURE_VARIANT_ADD(bind_wildcard, v6_v4mapped_loopback_v6_v4mapped_any)
+{
+	.family = {AF_INET6, AF_INET6},
+	.addr = {&in6addr_v4mapped_loopback, &in6addr_v4mapped_any},
+	.expected_errno = EADDRINUSE,
+};
+
 static void setup_addr(FIXTURE_DATA(bind_wildcard) *self, int i,
 		       int family, const void *addr_const)
 {
-- 
2.30.2

[PATCH v1 net 6/8] selftest: tcp: Add more bind() calls.

[Kuniyuki Iwashima]

In addtition to the two addresses defined in the fixtures, this patch
add 6 more bind calls():

  * 0.0.0.0
  * 127.0.0.1
  * ::
  * ::1
  * ::ffff:0.0.0.0
  * ::ffff:127.0.0.1

The first two per-fixture bind() calls control how inet_bind2_bucket
is created, and the rest 6 bind() calls cover as many conflicting
patterns as possible.

Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
---
 tools/testing/selftests/net/bind_wildcard.c | 225 +++++++++++++++-----
 1 file changed, 166 insertions(+), 59 deletions(-)

diff --git a/tools/testing/selftests/net/bind_wildcard.c b/tools/testing/selftests/net/bind_wildcard.c
index 5100dd713a49..4ecd3835f33c 100644
--- a/tools/testing/selftests/net/bind_wildcard.c
+++ b/tools/testing/selftests/net/bind_wildcard.c
@@ -25,21 +25,34 @@ static const struct in6_addr in6addr_v4mapped_loopback = {
 	}
 };
 
+#define NR_SOCKETS 8
+
 FIXTURE(bind_wildcard)
 {
-	socklen_t addrlen[2];
+	int fd[NR_SOCKETS];
+	socklen_t addrlen[NR_SOCKETS];
 	union {
 		struct sockaddr addr;
 		struct sockaddr_in addr4;
 		struct sockaddr_in6 addr6;
-	} addr[2];
+	} addr[NR_SOCKETS];
 };
 
 FIXTURE_VARIANT(bind_wildcard)
 {
 	sa_family_t family[2];
 	const void *addr[2];
-	int expected_errno;
+
+	/* 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];
 };
 
 /* (IPv4, IPv4) */
@@ -47,14 +60,20 @@ FIXTURE_VARIANT_ADD(bind_wildcard, v4_any_v4_local)
 {
 	.family = {AF_INET, AF_INET},
 	.addr = {&in4addr_any, &in4addr_loopback},
-	.expected_errno = EADDRINUSE,
+	.expected_errno = {0, EADDRINUSE,
+			   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 = EADDRINUSE,
+	.expected_errno = {0, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, 0,
+			   EADDRINUSE, EADDRINUSE},
 };
 
 /* (IPv4, IPv6) */
@@ -62,56 +81,80 @@ FIXTURE_VARIANT_ADD(bind_wildcard, v4_any_v6_any)
 {
 	.family = {AF_INET, AF_INET6},
 	.addr = {&in4addr_any, &in6addr_any},
-	.expected_errno = EADDRINUSE,
+	.expected_errno = {0, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, 0,
+			   EADDRINUSE, EADDRINUSE},
 };
 
 FIXTURE_VARIANT_ADD(bind_wildcard, v4_any_v6_local)
 {
 	.family = {AF_INET, AF_INET6},
 	.addr = {&in4addr_any, &in6addr_loopback},
-	.expected_errno = 0,
+	.expected_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 = EADDRINUSE,
+	.expected_errno = {0, EADDRINUSE,
+			   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 = EADDRINUSE,
+	.expected_errno = {0, EADDRINUSE,
+			   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 = EADDRINUSE,
+	.expected_errno = {0, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, 0,
+			   EADDRINUSE, EADDRINUSE},
 };
 
 FIXTURE_VARIANT_ADD(bind_wildcard, v4_local_v6_local)
 {
 	.family = {AF_INET, AF_INET6},
 	.addr = {&in4addr_loopback, &in6addr_loopback},
-	.expected_errno = 0,
+	.expected_errno = {0, 0,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE},
 };
 
 FIXTURE_VARIANT_ADD(bind_wildcard, v4_local_v6_v4mapped_any)
 {
 	.family = {AF_INET, AF_INET6},
 	.addr = {&in4addr_loopback, &in6addr_v4mapped_any},
-	.expected_errno = EADDRINUSE,
+	.expected_errno = {0, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, 0,
+			   EADDRINUSE, EADDRINUSE},
 };
 
 FIXTURE_VARIANT_ADD(bind_wildcard, v4_local_v6_v4mapped_local)
 {
 	.family = {AF_INET, AF_INET6},
 	.addr = {&in4addr_loopback, &in6addr_v4mapped_loopback},
-	.expected_errno = EADDRINUSE,
+	.expected_errno = {0, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, 0,
+			   EADDRINUSE, EADDRINUSE},
 };
 
 /* (IPv6, IPv4) */
@@ -119,56 +162,80 @@ FIXTURE_VARIANT_ADD(bind_wildcard, v6_any_v4_any)
 {
 	.family = {AF_INET6, AF_INET},
 	.addr = {&in6addr_any, &in4addr_any},
-	.expected_errno = EADDRINUSE,
+	.expected_errno = {0, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE},
 };
 
 FIXTURE_VARIANT_ADD(bind_wildcard, v6_any_v4_local)
 {
 	.family = {AF_INET6, AF_INET},
 	.addr = {&in6addr_any, &in4addr_loopback},
-	.expected_errno = EADDRINUSE,
+	.expected_errno = {0, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE},
 };
 
 FIXTURE_VARIANT_ADD(bind_wildcard, v6_local_v4_any)
 {
 	.family = {AF_INET6, AF_INET},
 	.addr = {&in6addr_loopback, &in4addr_any},
-	.expected_errno = 0,
+	.expected_errno = {0, 0,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE},
 };
 
 FIXTURE_VARIANT_ADD(bind_wildcard, v6_local_v4_local)
 {
 	.family = {AF_INET6, AF_INET},
 	.addr = {&in6addr_loopback, &in4addr_loopback},
-	.expected_errno = 0,
+	.expected_errno = {0, 0,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE},
 };
 
 FIXTURE_VARIANT_ADD(bind_wildcard, v6_v4mapped_any_v4_any)
 {
 	.family = {AF_INET6, AF_INET},
 	.addr = {&in6addr_v4mapped_any, &in4addr_any},
-	.expected_errno = EADDRINUSE,
+	.expected_errno = {0, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, 0,
+			   EADDRINUSE, EADDRINUSE},
 };
 
 FIXTURE_VARIANT_ADD(bind_wildcard, v6_v4mapped_any_v4_local)
 {
 	.family = {AF_INET6, AF_INET},
 	.addr = {&in6addr_v4mapped_any, &in4addr_loopback},
-	.expected_errno = EADDRINUSE,
+	.expected_errno = {0, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, 0,
+			   EADDRINUSE, EADDRINUSE},
 };
 
 FIXTURE_VARIANT_ADD(bind_wildcard, v6_v4mapped_local_v4_any)
 {
 	.family = {AF_INET6, AF_INET},
 	.addr = {&in6addr_v4mapped_loopback, &in4addr_any},
-	.expected_errno = EADDRINUSE,
+	.expected_errno = {0, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, 0,
+			   EADDRINUSE, EADDRINUSE},
 };
 
 FIXTURE_VARIANT_ADD(bind_wildcard, v6_v4mapped_local_v4_local)
 {
 	.family = {AF_INET6, AF_INET},
 	.addr = {&in6addr_v4mapped_loopback, &in4addr_loopback},
-	.expected_errno = EADDRINUSE,
+	.expected_errno = {0, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, 0,
+			   EADDRINUSE, EADDRINUSE},
 };
 
 /* (IPv6, IPv6) */
@@ -176,84 +243,120 @@ FIXTURE_VARIANT_ADD(bind_wildcard, v6_any_v6_local)
 {
 	.family = {AF_INET6, AF_INET6},
 	.addr = {&in6addr_any, &in6addr_loopback},
-	.expected_errno = EADDRINUSE,
+	.expected_errno = {0, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE},
 };
 
 FIXTURE_VARIANT_ADD(bind_wildcard, v6_any_v6_v4mapped_any)
 {
 	.family = {AF_INET6, AF_INET6},
 	.addr = {&in6addr_any, &in6addr_v4mapped_any},
-	.expected_errno = EADDRINUSE,
+	.expected_errno = {0, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE},
 };
 
 FIXTURE_VARIANT_ADD(bind_wildcard, v6_any_v6_v4mapped_local)
 {
 	.family = {AF_INET6, AF_INET6},
 	.addr = {&in6addr_any, &in6addr_v4mapped_loopback},
-	.expected_errno = EADDRINUSE,
+	.expected_errno = {0, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE},
 };
 
 FIXTURE_VARIANT_ADD(bind_wildcard, v6_local_v6_any)
 {
 	.family = {AF_INET6, AF_INET6},
 	.addr = {&in6addr_loopback, &in6addr_any},
-	.expected_errno = EADDRINUSE,
+	.expected_errno = {0, EADDRINUSE,
+			   0, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE},
 };
 
 FIXTURE_VARIANT_ADD(bind_wildcard, v6_local_v6_v4mapped_any)
 {
 	.family = {AF_INET6, AF_INET6},
 	.addr = {&in6addr_loopback, &in6addr_v4mapped_any},
-	.expected_errno = 0,
+	.expected_errno = {0, 0,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE},
 };
 
 FIXTURE_VARIANT_ADD(bind_wildcard, v6_local_v6_v4mapped_local)
 {
 	.family = {AF_INET6, AF_INET6},
 	.addr = {&in6addr_loopback, &in6addr_v4mapped_loopback},
-	.expected_errno = 0,
+	.expected_errno = {0, 0,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE},
 };
 
 FIXTURE_VARIANT_ADD(bind_wildcard, v6_v4mapped_any_v6_any)
 {
 	.family = {AF_INET6, AF_INET6},
 	.addr = {&in6addr_v4mapped_any, &in6addr_any},
-	.expected_errno = EADDRINUSE,
+	.expected_errno = {0, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, 0,
+			   EADDRINUSE, EADDRINUSE},
 };
 
 FIXTURE_VARIANT_ADD(bind_wildcard, v6_v4mapped_any_v6_local)
 {
 	.family = {AF_INET6, AF_INET6},
 	.addr = {&in6addr_v4mapped_any, &in6addr_loopback},
-	.expected_errno = 0,
+	.expected_errno = {0, 0,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE},
 };
 
 FIXTURE_VARIANT_ADD(bind_wildcard, v6_v4mapped_any_v6_v4mapped_local)
 {
 	.family = {AF_INET6, AF_INET6},
 	.addr = {&in6addr_v4mapped_any, &in6addr_v4mapped_loopback},
-	.expected_errno = EADDRINUSE,
+	.expected_errno = {0, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, 0,
+			   EADDRINUSE, EADDRINUSE},
 };
 
 FIXTURE_VARIANT_ADD(bind_wildcard, v6_v4mapped_loopback_v6_any)
 {
 	.family = {AF_INET6, AF_INET6},
 	.addr = {&in6addr_v4mapped_loopback, &in6addr_any},
-	.expected_errno = EADDRINUSE,
+	.expected_errno = {0, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, 0,
+			   EADDRINUSE, EADDRINUSE},
 };
 
 FIXTURE_VARIANT_ADD(bind_wildcard, v6_v4mapped_loopback_v6_local)
 {
 	.family = {AF_INET6, AF_INET6},
 	.addr = {&in6addr_v4mapped_loopback, &in6addr_loopback},
-	.expected_errno = 0,
+	.expected_errno = {0, 0,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE},
 };
 
 FIXTURE_VARIANT_ADD(bind_wildcard, v6_v4mapped_loopback_v6_v4mapped_any)
 {
 	.family = {AF_INET6, AF_INET6},
 	.addr = {&in6addr_v4mapped_loopback, &in6addr_v4mapped_any},
-	.expected_errno = EADDRINUSE,
+	.expected_errno = {0, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, 0,
+			   EADDRINUSE, EADDRINUSE},
 };
 
 static void setup_addr(FIXTURE_DATA(bind_wildcard) *self, int i,
@@ -284,52 +387,56 @@ FIXTURE_SETUP(bind_wildcard)
 {
 	setup_addr(self, 0, variant->family[0], variant->addr[0]);
 	setup_addr(self, 1, variant->family[1], variant->addr[1]);
+
+	setup_addr(self, 2, AF_INET, &in4addr_any);
+	setup_addr(self, 3, AF_INET, &in4addr_loopback);
+
+	setup_addr(self, 4, AF_INET6, &in6addr_any);
+	setup_addr(self, 5, AF_INET6, &in6addr_loopback);
+	setup_addr(self, 6, AF_INET6, &in6addr_v4mapped_any);
+	setup_addr(self, 7, AF_INET6, &in6addr_v4mapped_loopback);
 }
 
 FIXTURE_TEARDOWN(bind_wildcard)
 {
+	int i;
+
+	for (i = 0; i < NR_SOCKETS; i++)
+		close(self->fd[i]);
 }
 
-void bind_sockets(struct __test_metadata *_metadata,
-		  FIXTURE_DATA(bind_wildcard) *self,
-		  int expected_errno,
-		  struct sockaddr *addr1, socklen_t addrlen1,
-		  struct sockaddr *addr2, socklen_t addrlen2)
+void bind_socket(struct __test_metadata *_metadata,
+		 FIXTURE_DATA(bind_wildcard) *self,
+		 const FIXTURE_VARIANT(bind_wildcard) *variant,
+		 int i)
 {
-	int fd[2];
 	int ret;
 
-	fd[0] = socket(addr1->sa_family, SOCK_STREAM, 0);
-	ASSERT_GT(fd[0], 0);
-
-	ret = bind(fd[0], addr1, addrlen1);
-	ASSERT_EQ(ret, 0);
+	self->fd[i] = socket(self->addr[i].addr.sa_family, SOCK_STREAM, 0);
+	ASSERT_GT(self->fd[i], 0);
 
-	ret = getsockname(fd[0], addr1, &addrlen1);
-	ASSERT_EQ(ret, 0);
+	self->addr[i].addr4.sin_port = self->addr[0].addr4.sin_port;
 
-	((struct sockaddr_in *)addr2)->sin_port = ((struct sockaddr_in *)addr1)->sin_port;
-
-	fd[1] = socket(addr2->sa_family, SOCK_STREAM, 0);
-	ASSERT_GT(fd[1], 0);
-
-	ret = bind(fd[1], addr2, addrlen2);
-	if (expected_errno) {
+	ret = bind(self->fd[i], &self->addr[i].addr, self->addrlen[i]);
+	if (variant->expected_errno[i]) {
 		ASSERT_EQ(ret, -1);
-		ASSERT_EQ(errno, expected_errno);
+		ASSERT_EQ(errno, variant->expected_errno[i]);
 	} else {
 		ASSERT_EQ(ret, 0);
 	}
 
-	close(fd[1]);
-	close(fd[0]);
+	if (i == 0) {
+		ret = getsockname(self->fd[0], &self->addr[0].addr, &self->addrlen[0]);
+		ASSERT_EQ(ret, 0);
+	}
 }
 
 TEST_F(bind_wildcard, plain)
 {
-	bind_sockets(_metadata, self, variant->expected_errno,
-		     &self->addr[0].addr, self->addrlen[0],
-		     &self->addr[1].addr, self->addrlen[1]);
+	int i;
+
+	for (i = 0; i < NR_SOCKETS; i++)
+		bind_socket(_metadata, self, variant, i);
 }
 
 TEST_HARNESS_MAIN
-- 
2.30.2

[PATCH v1 net 7/8] selftest: tcp: Add bind() tests for IPV6_V6ONLY.

[Kuniyuki Iwashima]

bhash2 was not well tested for IPv6-only sockets.

This patch adds test cases where we set IPV6_V6ONLY for per-fixture
bind() calls if variant->ipv6_only[i] is true.

Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
---
 tools/testing/selftests/net/bind_wildcard.c | 116 ++++++++++++++++++++
 1 file changed, 116 insertions(+)

diff --git a/tools/testing/selftests/net/bind_wildcard.c b/tools/testing/selftests/net/bind_wildcard.c
index 4ecd3835f33c..6d7f02441b9d 100644
--- a/tools/testing/selftests/net/bind_wildcard.c
+++ b/tools/testing/selftests/net/bind_wildcard.c
@@ -42,6 +42,7 @@ 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:
 	 *
@@ -87,6 +88,17 @@ FIXTURE_VARIANT_ADD(bind_wildcard, v4_any_v6_any)
 			   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},
+};
+
 FIXTURE_VARIANT_ADD(bind_wildcard, v4_any_v6_local)
 {
 	.family = {AF_INET, AF_INET6},
@@ -127,6 +139,17 @@ FIXTURE_VARIANT_ADD(bind_wildcard, v4_local_v6_any)
 			   EADDRINUSE, EADDRINUSE},
 };
 
+FIXTURE_VARIANT_ADD(bind_wildcard, v4_local_v6_any_only)
+{
+	.family = {AF_INET, AF_INET6},
+	.addr = {&in4addr_loopback, &in6addr_any},
+	.ipv6_only = {false, true},
+	.expected_errno = {0, 0,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE},
+};
+
 FIXTURE_VARIANT_ADD(bind_wildcard, v4_local_v6_local)
 {
 	.family = {AF_INET, AF_INET6},
@@ -168,6 +191,17 @@ FIXTURE_VARIANT_ADD(bind_wildcard, v6_any_v4_any)
 			   EADDRINUSE, EADDRINUSE},
 };
 
+FIXTURE_VARIANT_ADD(bind_wildcard, v6_any_only_v4_any)
+{
+	.family = {AF_INET6, AF_INET},
+	.addr = {&in6addr_any, &in4addr_any},
+	.ipv6_only = {true, false},
+	.expected_errno = {0, 0,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE},
+};
+
 FIXTURE_VARIANT_ADD(bind_wildcard, v6_any_v4_local)
 {
 	.family = {AF_INET6, AF_INET},
@@ -178,6 +212,17 @@ FIXTURE_VARIANT_ADD(bind_wildcard, v6_any_v4_local)
 			   EADDRINUSE, EADDRINUSE},
 };
 
+FIXTURE_VARIANT_ADD(bind_wildcard, v6_any_only_v4_local)
+{
+	.family = {AF_INET6, AF_INET},
+	.addr = {&in6addr_any, &in4addr_loopback},
+	.ipv6_only = {true, false},
+	.expected_errno = {0, 0,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE},
+};
+
 FIXTURE_VARIANT_ADD(bind_wildcard, v6_local_v4_any)
 {
 	.family = {AF_INET6, AF_INET},
@@ -249,6 +294,17 @@ FIXTURE_VARIANT_ADD(bind_wildcard, v6_any_v6_local)
 			   EADDRINUSE, EADDRINUSE},
 };
 
+FIXTURE_VARIANT_ADD(bind_wildcard, v6_any_only_v6_local)
+{
+	.family = {AF_INET6, AF_INET6},
+	.addr = {&in6addr_any, &in6addr_loopback},
+	.ipv6_only = {true, false},
+	.expected_errno = {0, EADDRINUSE,
+			   0, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE},
+};
+
 FIXTURE_VARIANT_ADD(bind_wildcard, v6_any_v6_v4mapped_any)
 {
 	.family = {AF_INET6, AF_INET6},
@@ -259,6 +315,17 @@ FIXTURE_VARIANT_ADD(bind_wildcard, v6_any_v6_v4mapped_any)
 			   EADDRINUSE, EADDRINUSE},
 };
 
+FIXTURE_VARIANT_ADD(bind_wildcard, v6_any_only_v6_v4mapped_any)
+{
+	.family = {AF_INET6, AF_INET6},
+	.addr = {&in6addr_any, &in6addr_v4mapped_any},
+	.ipv6_only = {true, false},
+	.expected_errno = {0, 0,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE},
+};
+
 FIXTURE_VARIANT_ADD(bind_wildcard, v6_any_v6_v4mapped_local)
 {
 	.family = {AF_INET6, AF_INET6},
@@ -269,6 +336,17 @@ FIXTURE_VARIANT_ADD(bind_wildcard, v6_any_v6_v4mapped_local)
 			   EADDRINUSE, EADDRINUSE},
 };
 
+FIXTURE_VARIANT_ADD(bind_wildcard, v6_any_only_v6_v4mapped_local)
+{
+	.family = {AF_INET6, AF_INET6},
+	.addr = {&in6addr_any, &in6addr_v4mapped_loopback},
+	.ipv6_only = {true, false},
+	.expected_errno = {0, 0,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE},
+};
+
 FIXTURE_VARIANT_ADD(bind_wildcard, v6_local_v6_any)
 {
 	.family = {AF_INET6, AF_INET6},
@@ -279,6 +357,17 @@ FIXTURE_VARIANT_ADD(bind_wildcard, v6_local_v6_any)
 			   EADDRINUSE, EADDRINUSE},
 };
 
+FIXTURE_VARIANT_ADD(bind_wildcard, v6_local_v6_any_only)
+{
+	.family = {AF_INET6, AF_INET6},
+	.addr = {&in6addr_loopback, &in6addr_any},
+	.ipv6_only = {false, true},
+	.expected_errno = {0, EADDRINUSE,
+			   0, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE},
+};
+
 FIXTURE_VARIANT_ADD(bind_wildcard, v6_local_v6_v4mapped_any)
 {
 	.family = {AF_INET6, AF_INET6},
@@ -309,6 +398,17 @@ FIXTURE_VARIANT_ADD(bind_wildcard, v6_v4mapped_any_v6_any)
 			   EADDRINUSE, EADDRINUSE},
 };
 
+FIXTURE_VARIANT_ADD(bind_wildcard, v6_v4mapped_any_v6_any_only)
+{
+	.family = {AF_INET6, AF_INET6},
+	.addr = {&in6addr_v4mapped_any, &in6addr_any},
+	.ipv6_only = {false, true},
+	.expected_errno = {0, 0,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE},
+};
+
 FIXTURE_VARIANT_ADD(bind_wildcard, v6_v4mapped_any_v6_local)
 {
 	.family = {AF_INET6, AF_INET6},
@@ -339,6 +439,17 @@ FIXTURE_VARIANT_ADD(bind_wildcard, v6_v4mapped_loopback_v6_any)
 			   EADDRINUSE, EADDRINUSE},
 };
 
+FIXTURE_VARIANT_ADD(bind_wildcard, v6_v4mapped_loopback_v6_any_only)
+{
+	.family = {AF_INET6, AF_INET6},
+	.addr = {&in6addr_v4mapped_loopback, &in6addr_any},
+	.ipv6_only = {false, true},
+	.expected_errno = {0, 0,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE},
+};
+
 FIXTURE_VARIANT_ADD(bind_wildcard, v6_v4mapped_loopback_v6_local)
 {
 	.family = {AF_INET6, AF_INET6},
@@ -415,6 +526,11 @@ void bind_socket(struct __test_metadata *_metadata,
 	self->fd[i] = socket(self->addr[i].addr.sa_family, SOCK_STREAM, 0);
 	ASSERT_GT(self->fd[i], 0);
 
+	if (i < 2 && variant->ipv6_only[i]) {
+		ret = setsockopt(self->fd[i], SOL_IPV6, IPV6_V6ONLY, &(int){1}, sizeof(int));
+		ASSERT_EQ(ret, 0);
+	}
+
 	self->addr[i].addr4.sin_port = self->addr[0].addr4.sin_port;
 
 	ret = bind(self->fd[i], &self->addr[i].addr, self->addrlen[i]);
-- 
2.30.2

[PATCH v1 net 8/8] selftest: tcp: Add bind() tests for SO_REUSEADDR/SO_REUSEPORT.

[Kuniyuki Iwashima]

This patch adds two tests using SO_REUSEADDR and SO_REUSEPORT and
defines errno for each test case.

SO_REUSEADDR/SO_REUSEPORT is set for the per-fixture two bind()
calls.

The notable pattern is the pair of v6only [::] and plain [::].
The two sockets are put into the same tb2, where per-bucket v6only
flag would be useless to detect bind() conflict.

Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
---
 tools/testing/selftests/net/bind_wildcard.c | 263 +++++++++++++++++++-
 1 file changed, 257 insertions(+), 6 deletions(-)

diff --git a/tools/testing/selftests/net/bind_wildcard.c b/tools/testing/selftests/net/bind_wildcard.c
index 6d7f02441b9d..b7b54d646b93 100644
--- a/tools/testing/selftests/net/bind_wildcard.c
+++ b/tools/testing/selftests/net/bind_wildcard.c
@@ -54,6 +54,7 @@ FIXTURE_VARIANT(bind_wildcard)
 	 *   ::ffff:127.0.0.1
 	 */
 	int expected_errno[NR_SOCKETS];
+	int expected_reuse_errno[NR_SOCKETS];
 };
 
 /* (IPv4, IPv4) */
@@ -65,6 +66,10 @@ FIXTURE_VARIANT_ADD(bind_wildcard, v4_any_v4_local)
 			   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)
@@ -75,6 +80,10 @@ FIXTURE_VARIANT_ADD(bind_wildcard, v4_local_v4_any)
 			   EADDRINUSE, EADDRINUSE,
 			   EADDRINUSE, 0,
 			   EADDRINUSE, EADDRINUSE},
+	.expected_reuse_errno = {0, 0,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, 0,
+				 EADDRINUSE, EADDRINUSE},
 };
 
 /* (IPv4, IPv6) */
@@ -86,6 +95,10 @@ FIXTURE_VARIANT_ADD(bind_wildcard, v4_any_v6_any)
 			   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)
@@ -97,6 +110,10 @@ FIXTURE_VARIANT_ADD(bind_wildcard, v4_any_v6_any_only)
 			   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)
@@ -107,6 +124,10 @@ FIXTURE_VARIANT_ADD(bind_wildcard, v4_any_v6_local)
 			   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)
@@ -117,6 +138,10 @@ FIXTURE_VARIANT_ADD(bind_wildcard, v4_any_v6_v4mapped_any)
 			   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)
@@ -127,6 +152,10 @@ FIXTURE_VARIANT_ADD(bind_wildcard, v4_any_v6_v4mapped_local)
 			   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)
@@ -137,6 +166,10 @@ FIXTURE_VARIANT_ADD(bind_wildcard, v4_local_v6_any)
 			   EADDRINUSE, EADDRINUSE,
 			   EADDRINUSE, 0,
 			   EADDRINUSE, EADDRINUSE},
+	.expected_reuse_errno = {0, 0,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, EADDRINUSE},
 };
 
 FIXTURE_VARIANT_ADD(bind_wildcard, v4_local_v6_any_only)
@@ -148,6 +181,10 @@ FIXTURE_VARIANT_ADD(bind_wildcard, v4_local_v6_any_only)
 			   EADDRINUSE, EADDRINUSE,
 			   EADDRINUSE, EADDRINUSE,
 			   EADDRINUSE, EADDRINUSE},
+	.expected_reuse_errno = {0, 0,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, EADDRINUSE},
 };
 
 FIXTURE_VARIANT_ADD(bind_wildcard, v4_local_v6_local)
@@ -158,6 +195,10 @@ FIXTURE_VARIANT_ADD(bind_wildcard, v4_local_v6_local)
 			   EADDRINUSE, EADDRINUSE,
 			   EADDRINUSE, EADDRINUSE,
 			   EADDRINUSE, EADDRINUSE},
+	.expected_reuse_errno = {0, 0,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, EADDRINUSE},
 };
 
 FIXTURE_VARIANT_ADD(bind_wildcard, v4_local_v6_v4mapped_any)
@@ -168,6 +209,10 @@ FIXTURE_VARIANT_ADD(bind_wildcard, v4_local_v6_v4mapped_any)
 			   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_v4mapped_local)
@@ -178,6 +223,10 @@ FIXTURE_VARIANT_ADD(bind_wildcard, v4_local_v6_v4mapped_local)
 			   EADDRINUSE, EADDRINUSE,
 			   EADDRINUSE, 0,
 			   EADDRINUSE, EADDRINUSE},
+	.expected_reuse_errno = {0, 0,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, 0,
+				 EADDRINUSE, EADDRINUSE},
 };
 
 /* (IPv6, IPv4) */
@@ -189,6 +238,10 @@ FIXTURE_VARIANT_ADD(bind_wildcard, v6_any_v4_any)
 			   EADDRINUSE, EADDRINUSE,
 			   EADDRINUSE, EADDRINUSE,
 			   EADDRINUSE, EADDRINUSE},
+	.expected_reuse_errno = {0, 0,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, EADDRINUSE},
 };
 
 FIXTURE_VARIANT_ADD(bind_wildcard, v6_any_only_v4_any)
@@ -200,6 +253,10 @@ FIXTURE_VARIANT_ADD(bind_wildcard, v6_any_only_v4_any)
 			   EADDRINUSE, EADDRINUSE,
 			   EADDRINUSE, EADDRINUSE,
 			   EADDRINUSE, EADDRINUSE},
+	.expected_reuse_errno = {0, 0,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, EADDRINUSE},
 };
 
 FIXTURE_VARIANT_ADD(bind_wildcard, v6_any_v4_local)
@@ -210,6 +267,10 @@ FIXTURE_VARIANT_ADD(bind_wildcard, v6_any_v4_local)
 			   EADDRINUSE, EADDRINUSE,
 			   EADDRINUSE, EADDRINUSE,
 			   EADDRINUSE, EADDRINUSE},
+	.expected_reuse_errno = {0, 0,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, EADDRINUSE},
 };
 
 FIXTURE_VARIANT_ADD(bind_wildcard, v6_any_only_v4_local)
@@ -221,6 +282,10 @@ FIXTURE_VARIANT_ADD(bind_wildcard, v6_any_only_v4_local)
 			   EADDRINUSE, EADDRINUSE,
 			   EADDRINUSE, EADDRINUSE,
 			   EADDRINUSE, EADDRINUSE},
+	.expected_reuse_errno = {0, 0,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, EADDRINUSE},
 };
 
 FIXTURE_VARIANT_ADD(bind_wildcard, v6_local_v4_any)
@@ -231,6 +296,10 @@ FIXTURE_VARIANT_ADD(bind_wildcard, v6_local_v4_any)
 			   EADDRINUSE, EADDRINUSE,
 			   EADDRINUSE, EADDRINUSE,
 			   EADDRINUSE, EADDRINUSE},
+	.expected_reuse_errno = {0, 0,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, EADDRINUSE},
 };
 
 FIXTURE_VARIANT_ADD(bind_wildcard, v6_local_v4_local)
@@ -241,6 +310,10 @@ FIXTURE_VARIANT_ADD(bind_wildcard, v6_local_v4_local)
 			   EADDRINUSE, EADDRINUSE,
 			   EADDRINUSE, EADDRINUSE,
 			   EADDRINUSE, EADDRINUSE},
+	.expected_reuse_errno = {0, 0,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, EADDRINUSE},
 };
 
 FIXTURE_VARIANT_ADD(bind_wildcard, v6_v4mapped_any_v4_any)
@@ -251,6 +324,10 @@ FIXTURE_VARIANT_ADD(bind_wildcard, v6_v4mapped_any_v4_any)
 			   EADDRINUSE, EADDRINUSE,
 			   EADDRINUSE, 0,
 			   EADDRINUSE, EADDRINUSE},
+	.expected_reuse_errno = {0, 0,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, 0,
+				 EADDRINUSE, EADDRINUSE},
 };
 
 FIXTURE_VARIANT_ADD(bind_wildcard, v6_v4mapped_any_v4_local)
@@ -261,6 +338,10 @@ FIXTURE_VARIANT_ADD(bind_wildcard, v6_v4mapped_any_v4_local)
 			   EADDRINUSE, EADDRINUSE,
 			   EADDRINUSE, 0,
 			   EADDRINUSE, EADDRINUSE},
+	.expected_reuse_errno = {0, 0,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, 0,
+				 EADDRINUSE, EADDRINUSE},
 };
 
 FIXTURE_VARIANT_ADD(bind_wildcard, v6_v4mapped_local_v4_any)
@@ -271,6 +352,10 @@ FIXTURE_VARIANT_ADD(bind_wildcard, v6_v4mapped_local_v4_any)
 			   EADDRINUSE, EADDRINUSE,
 			   EADDRINUSE, 0,
 			   EADDRINUSE, EADDRINUSE},
+	.expected_reuse_errno = {0, 0,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, 0,
+				 EADDRINUSE, EADDRINUSE},
 };
 
 FIXTURE_VARIANT_ADD(bind_wildcard, v6_v4mapped_local_v4_local)
@@ -281,9 +366,72 @@ FIXTURE_VARIANT_ADD(bind_wildcard, v6_v4mapped_local_v4_local)
 			   EADDRINUSE, EADDRINUSE,
 			   EADDRINUSE, 0,
 			   EADDRINUSE, EADDRINUSE},
+	.expected_reuse_errno = {0, 0,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, 0,
+				 EADDRINUSE, EADDRINUSE},
 };
 
 /* (IPv6, IPv6) */
+FIXTURE_VARIANT_ADD(bind_wildcard, v6_any_v6_any)
+{
+	.family = {AF_INET6, AF_INET6},
+	.addr = {&in6addr_any, &in6addr_any},
+	.expected_errno = {0, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE},
+	.expected_reuse_errno = {0, 0,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, EADDRINUSE},
+};
+
+FIXTURE_VARIANT_ADD(bind_wildcard, v6_any_only_v6_any)
+{
+	.family = {AF_INET6, AF_INET6},
+	.addr = {&in6addr_any, &in6addr_any},
+	.ipv6_only = {true, false},
+	.expected_errno = {0, EADDRINUSE,
+			   0, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE},
+	.expected_reuse_errno = {0, 0,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, EADDRINUSE},
+};
+
+FIXTURE_VARIANT_ADD(bind_wildcard, v6_any_v6_any_only)
+{
+	.family = {AF_INET6, AF_INET6},
+	.addr = {&in6addr_any, &in6addr_any},
+	.ipv6_only = {false, true},
+	.expected_errno = {0, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE},
+	.expected_reuse_errno = {0, 0,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, EADDRINUSE},
+};
+
+FIXTURE_VARIANT_ADD(bind_wildcard, v6_any_only_v6_any_only)
+{
+	.family = {AF_INET6, AF_INET6},
+	.addr = {&in6addr_any, &in6addr_any},
+	.ipv6_only = {true, true},
+	.expected_errno = {0, EADDRINUSE,
+			   0, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE,
+			   EADDRINUSE, EADDRINUSE},
+	.expected_reuse_errno = {0, 0,
+				 0, EADDRINUSE,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, EADDRINUSE},
+};
+
 FIXTURE_VARIANT_ADD(bind_wildcard, v6_any_v6_local)
 {
 	.family = {AF_INET6, AF_INET6},
@@ -292,6 +440,10 @@ FIXTURE_VARIANT_ADD(bind_wildcard, v6_any_v6_local)
 			   EADDRINUSE, EADDRINUSE,
 			   EADDRINUSE, EADDRINUSE,
 			   EADDRINUSE, EADDRINUSE},
+	.expected_reuse_errno = {0, 0,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, EADDRINUSE},
 };
 
 FIXTURE_VARIANT_ADD(bind_wildcard, v6_any_only_v6_local)
@@ -303,6 +455,10 @@ FIXTURE_VARIANT_ADD(bind_wildcard, v6_any_only_v6_local)
 			   0, EADDRINUSE,
 			   EADDRINUSE, EADDRINUSE,
 			   EADDRINUSE, EADDRINUSE},
+	.expected_reuse_errno = {0, 0,
+				 0, EADDRINUSE,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, EADDRINUSE},
 };
 
 FIXTURE_VARIANT_ADD(bind_wildcard, v6_any_v6_v4mapped_any)
@@ -313,6 +469,10 @@ FIXTURE_VARIANT_ADD(bind_wildcard, v6_any_v6_v4mapped_any)
 			   EADDRINUSE, EADDRINUSE,
 			   EADDRINUSE, EADDRINUSE,
 			   EADDRINUSE, EADDRINUSE},
+	.expected_reuse_errno = {0, 0,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, EADDRINUSE},
 };
 
 FIXTURE_VARIANT_ADD(bind_wildcard, v6_any_only_v6_v4mapped_any)
@@ -324,6 +484,10 @@ FIXTURE_VARIANT_ADD(bind_wildcard, v6_any_only_v6_v4mapped_any)
 			   EADDRINUSE, EADDRINUSE,
 			   EADDRINUSE, EADDRINUSE,
 			   EADDRINUSE, EADDRINUSE},
+	.expected_reuse_errno = {0, 0,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, EADDRINUSE},
 };
 
 FIXTURE_VARIANT_ADD(bind_wildcard, v6_any_v6_v4mapped_local)
@@ -334,6 +498,10 @@ FIXTURE_VARIANT_ADD(bind_wildcard, v6_any_v6_v4mapped_local)
 			   EADDRINUSE, EADDRINUSE,
 			   EADDRINUSE, EADDRINUSE,
 			   EADDRINUSE, EADDRINUSE},
+	.expected_reuse_errno = {0, 0,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, EADDRINUSE},
 };
 
 FIXTURE_VARIANT_ADD(bind_wildcard, v6_any_only_v6_v4mapped_local)
@@ -345,6 +513,10 @@ FIXTURE_VARIANT_ADD(bind_wildcard, v6_any_only_v6_v4mapped_local)
 			   EADDRINUSE, EADDRINUSE,
 			   EADDRINUSE, EADDRINUSE,
 			   EADDRINUSE, EADDRINUSE},
+	.expected_reuse_errno = {0, 0,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, EADDRINUSE},
 };
 
 FIXTURE_VARIANT_ADD(bind_wildcard, v6_local_v6_any)
@@ -355,6 +527,10 @@ FIXTURE_VARIANT_ADD(bind_wildcard, v6_local_v6_any)
 			   0, EADDRINUSE,
 			   EADDRINUSE, EADDRINUSE,
 			   EADDRINUSE, EADDRINUSE},
+	.expected_reuse_errno = {0, 0,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, EADDRINUSE},
 };
 
 FIXTURE_VARIANT_ADD(bind_wildcard, v6_local_v6_any_only)
@@ -366,6 +542,10 @@ FIXTURE_VARIANT_ADD(bind_wildcard, v6_local_v6_any_only)
 			   0, EADDRINUSE,
 			   EADDRINUSE, EADDRINUSE,
 			   EADDRINUSE, EADDRINUSE},
+	.expected_reuse_errno = {0, 0,
+				 0, EADDRINUSE,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, EADDRINUSE},
 };
 
 FIXTURE_VARIANT_ADD(bind_wildcard, v6_local_v6_v4mapped_any)
@@ -376,6 +556,10 @@ FIXTURE_VARIANT_ADD(bind_wildcard, v6_local_v6_v4mapped_any)
 			   EADDRINUSE, EADDRINUSE,
 			   EADDRINUSE, EADDRINUSE,
 			   EADDRINUSE, EADDRINUSE},
+	.expected_reuse_errno = {0, 0,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, EADDRINUSE},
 };
 
 FIXTURE_VARIANT_ADD(bind_wildcard, v6_local_v6_v4mapped_local)
@@ -386,6 +570,10 @@ FIXTURE_VARIANT_ADD(bind_wildcard, v6_local_v6_v4mapped_local)
 			   EADDRINUSE, EADDRINUSE,
 			   EADDRINUSE, EADDRINUSE,
 			   EADDRINUSE, EADDRINUSE},
+	.expected_reuse_errno = {0, 0,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, EADDRINUSE},
 };
 
 FIXTURE_VARIANT_ADD(bind_wildcard, v6_v4mapped_any_v6_any)
@@ -396,6 +584,10 @@ FIXTURE_VARIANT_ADD(bind_wildcard, v6_v4mapped_any_v6_any)
 			   EADDRINUSE, EADDRINUSE,
 			   EADDRINUSE, 0,
 			   EADDRINUSE, EADDRINUSE},
+	.expected_reuse_errno = {0, 0,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, EADDRINUSE},
 };
 
 FIXTURE_VARIANT_ADD(bind_wildcard, v6_v4mapped_any_v6_any_only)
@@ -407,6 +599,10 @@ FIXTURE_VARIANT_ADD(bind_wildcard, v6_v4mapped_any_v6_any_only)
 			   EADDRINUSE, EADDRINUSE,
 			   EADDRINUSE, EADDRINUSE,
 			   EADDRINUSE, EADDRINUSE},
+	.expected_reuse_errno = {0, 0,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, EADDRINUSE},
 };
 
 FIXTURE_VARIANT_ADD(bind_wildcard, v6_v4mapped_any_v6_local)
@@ -417,6 +613,10 @@ FIXTURE_VARIANT_ADD(bind_wildcard, v6_v4mapped_any_v6_local)
 			   EADDRINUSE, EADDRINUSE,
 			   EADDRINUSE, EADDRINUSE,
 			   EADDRINUSE, EADDRINUSE},
+	.expected_reuse_errno = {0, 0,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, EADDRINUSE},
 };
 
 FIXTURE_VARIANT_ADD(bind_wildcard, v6_v4mapped_any_v6_v4mapped_local)
@@ -427,6 +627,10 @@ FIXTURE_VARIANT_ADD(bind_wildcard, v6_v4mapped_any_v6_v4mapped_local)
 			   EADDRINUSE, EADDRINUSE,
 			   EADDRINUSE, 0,
 			   EADDRINUSE, EADDRINUSE},
+	.expected_reuse_errno = {0, 0,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, 0,
+				 EADDRINUSE, EADDRINUSE},
 };
 
 FIXTURE_VARIANT_ADD(bind_wildcard, v6_v4mapped_loopback_v6_any)
@@ -437,6 +641,10 @@ FIXTURE_VARIANT_ADD(bind_wildcard, v6_v4mapped_loopback_v6_any)
 			   EADDRINUSE, EADDRINUSE,
 			   EADDRINUSE, 0,
 			   EADDRINUSE, EADDRINUSE},
+	.expected_reuse_errno = {0, 0,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, EADDRINUSE},
 };
 
 FIXTURE_VARIANT_ADD(bind_wildcard, v6_v4mapped_loopback_v6_any_only)
@@ -448,6 +656,10 @@ FIXTURE_VARIANT_ADD(bind_wildcard, v6_v4mapped_loopback_v6_any_only)
 			   EADDRINUSE, EADDRINUSE,
 			   EADDRINUSE, EADDRINUSE,
 			   EADDRINUSE, EADDRINUSE},
+	.expected_reuse_errno = {0, 0,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, EADDRINUSE},
 };
 
 FIXTURE_VARIANT_ADD(bind_wildcard, v6_v4mapped_loopback_v6_local)
@@ -458,6 +670,10 @@ FIXTURE_VARIANT_ADD(bind_wildcard, v6_v4mapped_loopback_v6_local)
 			   EADDRINUSE, EADDRINUSE,
 			   EADDRINUSE, EADDRINUSE,
 			   EADDRINUSE, EADDRINUSE},
+	.expected_reuse_errno = {0, 0,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, EADDRINUSE},
 };
 
 FIXTURE_VARIANT_ADD(bind_wildcard, v6_v4mapped_loopback_v6_v4mapped_any)
@@ -468,6 +684,10 @@ FIXTURE_VARIANT_ADD(bind_wildcard, v6_v4mapped_loopback_v6_v4mapped_any)
 			   EADDRINUSE, EADDRINUSE,
 			   EADDRINUSE, 0,
 			   EADDRINUSE, EADDRINUSE},
+	.expected_reuse_errno = {0, 0,
+				 EADDRINUSE, EADDRINUSE,
+				 EADDRINUSE, 0,
+				 EADDRINUSE, EADDRINUSE},
 };
 
 static void setup_addr(FIXTURE_DATA(bind_wildcard) *self, int i,
@@ -519,7 +739,7 @@ FIXTURE_TEARDOWN(bind_wildcard)
 void bind_socket(struct __test_metadata *_metadata,
 		 FIXTURE_DATA(bind_wildcard) *self,
 		 const FIXTURE_VARIANT(bind_wildcard) *variant,
-		 int i)
+		 int i, int reuse)
 {
 	int ret;
 
@@ -531,14 +751,29 @@ void bind_socket(struct __test_metadata *_metadata,
 		ASSERT_EQ(ret, 0);
 	}
 
+	if (i < 2 && reuse) {
+		ret = setsockopt(self->fd[i], SOL_SOCKET, reuse, &(int){1}, sizeof(int));
+		ASSERT_EQ(ret, 0);
+	}
+
 	self->addr[i].addr4.sin_port = self->addr[0].addr4.sin_port;
 
 	ret = bind(self->fd[i], &self->addr[i].addr, self->addrlen[i]);
-	if (variant->expected_errno[i]) {
-		ASSERT_EQ(ret, -1);
-		ASSERT_EQ(errno, variant->expected_errno[i]);
+
+	if (reuse) {
+		if (variant->expected_reuse_errno[i]) {
+			ASSERT_EQ(ret, -1);
+			ASSERT_EQ(errno, variant->expected_reuse_errno[i]);
+		} else {
+			ASSERT_EQ(ret, 0);
+		}
 	} else {
-		ASSERT_EQ(ret, 0);
+		if (variant->expected_errno[i]) {
+			ASSERT_EQ(ret, -1);
+			ASSERT_EQ(errno, variant->expected_errno[i]);
+		} else {
+			ASSERT_EQ(ret, 0);
+		}
 	}
 
 	if (i == 0) {
@@ -552,7 +787,23 @@ TEST_F(bind_wildcard, plain)
 	int i;
 
 	for (i = 0; i < NR_SOCKETS; i++)
-		bind_socket(_metadata, self, variant, i);
+		bind_socket(_metadata, self, variant, i, 0);
+}
+
+TEST_F(bind_wildcard, reuseaddr)
+{
+	int i;
+
+	for (i = 0; i < NR_SOCKETS; i++)
+		bind_socket(_metadata, self, variant, i, SO_REUSEADDR);
+}
+
+TEST_F(bind_wildcard, reuseport)
+{
+	int i;
+
+	for (i = 0; i < NR_SOCKETS; i++)
+		bind_socket(_metadata, self, variant, i, SO_REUSEPORT);
 }
 
 TEST_HARNESS_MAIN
-- 
2.30.2