[PATCH v4 5/7] server: Track SO_REUSEADDR value.

[Paul Gofman]

From: Paul Gofman

---
 server/sock.c | 21 ++++++++-------------
 1 file changed, 8 insertions(+), 13 deletions(-)

diff --git a/server/sock.c b/server/sock.c
index 87a536bb363..7c5f0185fd5 100644
--- a/server/sock.c
+++ b/server/sock.c
@@ -233,6 +233,7 @@ struct sock
     unsigned int        nonblocking : 1; /* is the socket nonblocking? */
     unsigned int        bound : 1;   /* is the socket bound? */
     unsigned int        reset : 1;   /* did we get a TCP reset? */
+    unsigned int        reuseaddr : 1; /* winsock SO_REUSEADDR option value */
 };

static void sock_dump( struct object *obj, int verbose );
@@ -1545,6 +1546,7 @@ static struct sock *create_socket(void)
     sock->nonblocking = 0;
     sock->bound = 0;
     sock->reset = 0;
+    sock->reuseaddr = 0;
     sock->rcvbuf = 0;
     sock->sndbuf = 0;
     sock->rcvtimeo = 0;
@@ -2720,14 +2722,8 @@ static void sock_ioctl( struct fd *fd, ioctl_code_t code, struct async *async )

if (bind( unix_fd, &bind_addr.addr, unix_len ) < 0)
         {
-            if (errno == EADDRINUSE)
-            {
-                int reuse;
-                socklen_t len = sizeof(reuse);
-
-                if (!getsockopt( unix_fd, SOL_SOCKET, SO_REUSEADDR, (char *)&reuse, &len ) && reuse)
-                    errno = EACCES;
-            }
+            if (errno == EADDRINUSE && sock->reuseaddr)
+                errno = EACCES;

set_error( sock_get_ntstatus( errno ) );
             return;
@@ -2925,6 +2921,8 @@ static void sock_ioctl( struct fd *fd, ioctl_code_t code, struct async *async )
 #endif
         if (ret)
             set_error( sock_get_ntstatus( errno ) );
+        else
+            sock->reuseaddr = !!reuse;
         return;
     }

@@ -3018,7 +3016,6 @@ static void sock_ioctl( struct fd *fd, ioctl_code_t code, struct async *async )
     case IOCTL_AFD_WINE_GET_SO_REUSEADDR:
     {
         int reuse;
-        socklen_t len = sizeof(reuse);

if (!get_reply_max_size())
         {
@@ -3026,10 +3023,8 @@ static void sock_ioctl( struct fd *fd, ioctl_code_t code, struct async *async )
             return;
         }

-        if (!getsockopt( unix_fd, SOL_SOCKET, SO_REUSEADDR, &reuse, &len ))
-            set_reply_data( &reuse, min( sizeof(reuse), get_reply_max_size() ));
-        else
-            set_error( sock_get_ntstatus( errno ) );
+        reuse = sock->reuseaddr;
+        set_reply_data( &reuse, min( sizeof(reuse), get_reply_max_size() ));
         return;
     }