[PATCH v4 1/1] server: Ignore EADDRINUSE from listen() unless the provided socket is wildcarded.

[Ally Sommers]

From: Ally Sommers

---
 dlls/ws2_32/tests/sock.c |  2 +-
 server/sock.c            | 15 +++++++++++++++
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/dlls/ws2_32/tests/sock.c b/dlls/ws2_32/tests/sock.c
index e6ab5065cfe..4bf705ecf96 100644
--- a/dlls/ws2_32/tests/sock.c
+++ b/dlls/ws2_32/tests/sock.c
@@ -2241,7 +2241,7 @@ static void test_reuseaddr(void)
         rc = listen(s1, 1);
         ok(!rc, "got error %d.\n", WSAGetLastError());
         rc = listen(s2, 1);
-        todo_wine ok(!rc, "got error %d.\n", WSAGetLastError());
+        ok(!rc, "got error %d.\n", WSAGetLastError());
         rc = connect(s3, tests[i].addr_loopback, tests[i].addrlen);
         ok(!rc, "got error %d.\n", WSAGetLastError());

diff --git a/server/sock.c b/server/sock.c
index 2aae9aefbf0..7f9065237d8 100644
--- a/server/sock.c
+++ b/server/sock.c
@@ -2525,6 +2525,21 @@ static void sock_ioctl( struct fd *fd, ioctl_code_t code, struct async *async )

if (listen( unix_fd, params->backlog ) < 0)
         {
+            if (errno == EADDRINUSE)
+                switch (sock->family)
+                {
+                    case WS_AF_INET:
+                        if (sock->addr.in.sin_addr.WS_s_addr != htonl( INADDR_ANY ))
+                            return;
+                    case WS_AF_INET6:
+                    {
+                        union unix_sockaddr unix_addr;
+                        socklen_t len = sockaddr_to_unix(&sock->addr.addr, sizeof(struct WS_sockaddr_in6), &unix_addr);
+                        if (len && !IN6_IS_ADDR_UNSPECIFIED(&unix_addr.in6.sin6_addr))
+                            return;
+                    }
+                }
+
             set_error( sock_get_ntstatus( errno ) );
             return;
         }