* fhandler.h (class fhandler_socket): Add saw_reuseaddr status flag.

	* fhandler_socket.cc (fhandler_socket::bind): Set socket to
	SO_EXCLUSIVEADDRUSE if application didn't explicitely set SO_REUSEADDR
	socket option, on systems supporting SO_EXCLUSIVEADDRUSE.
	* net.cc (cygwin_setsockopt): Set fhandler's saw_reuseaddr status flag
	if SO_REUSEADDR socket option has been successsfully set.
	* wincap.h (wincaps::has_exclusiveaddruse): New element.
	* wincap.cc: Implement above element throughout.

1 files changed, 26 insertions, 13 deletions

diff --git a/winsup/cygwin/wincap.cc b/winsup/cygwin/wincap.cc
index 9ff3c92f1..6b6b0e11d 100644
--- a/winsup/cygwin/wincap.cc
+++ b/winsup/cygwin/wincap.cc
@@ -64,7 +64,8 @@ static NO_COPY wincaps wincap_unknown = {
   has_disk_ex_ioctls:false,
   has_working_virtual_lock:false,
   has_disabled_user_tos_setting:false,
-  has_fileid_dirinfo:false
+  has_fileid_dirinfo:false,
+  has_exclusiveaddruse:false
 };
 
 static NO_COPY wincaps wincap_95 = {
@@ -120,7 +121,8 @@ static NO_COPY wincaps wincap_95 = {
   has_disk_ex_ioctls:false,
   has_working_virtual_lock:false,
   has_disabled_user_tos_setting:false,
-  has_fileid_dirinfo:false
+  has_fileid_dirinfo:false,
+  has_exclusiveaddruse:false
 };
 
 static NO_COPY wincaps wincap_95osr2 = {
@@ -176,7 +178,8 @@ static NO_COPY wincaps wincap_95osr2 = {
   has_disk_ex_ioctls:false,
   has_working_virtual_lock:false,
   has_disabled_user_tos_setting:false,
-  has_fileid_dirinfo:false
+  has_fileid_dirinfo:false,
+  has_exclusiveaddruse:false
 };
 
 static NO_COPY wincaps wincap_98 = {
@@ -232,7 +235,8 @@ static NO_COPY wincaps wincap_98 = {
   has_disk_ex_ioctls:false,
   has_working_virtual_lock:false,
   has_disabled_user_tos_setting:false,
-  has_fileid_dirinfo:false
+  has_fileid_dirinfo:false,
+  has_exclusiveaddruse:false
 };
 
 static NO_COPY wincaps wincap_98se = {
@@ -288,7 +292,8 @@ static NO_COPY wincaps wincap_98se = {
   has_disk_ex_ioctls:false,
   has_working_virtual_lock:false,
   has_disabled_user_tos_setting:false,
-  has_fileid_dirinfo:false
+  has_fileid_dirinfo:false,
+  has_exclusiveaddruse:false
 };
 
 static NO_COPY wincaps wincap_me = {
@@ -344,7 +349,8 @@ static NO_COPY wincaps wincap_me = {
   has_disk_ex_ioctls:false,
   has_working_virtual_lock:false,
   has_disabled_user_tos_setting:false,
-  has_fileid_dirinfo:false
+  has_fileid_dirinfo:false,
+  has_exclusiveaddruse:false
 };
 
 static NO_COPY wincaps wincap_nt3 = {
@@ -400,7 +406,8 @@ static NO_COPY wincaps wincap_nt3 = {
   has_disk_ex_ioctls:false,
   has_working_virtual_lock:true,
   has_disabled_user_tos_setting:false,
-  has_fileid_dirinfo:false
+  has_fileid_dirinfo:false,
+  has_exclusiveaddruse:false
 };
 
 static NO_COPY wincaps wincap_nt4 = {
@@ -456,7 +463,8 @@ static NO_COPY wincaps wincap_nt4 = {
   has_disk_ex_ioctls:false,
   has_working_virtual_lock:true,
   has_disabled_user_tos_setting:false,
-  has_fileid_dirinfo:false
+  has_fileid_dirinfo:false,
+  has_exclusiveaddruse:false
 };
 
 static NO_COPY wincaps wincap_nt4sp4 = {
@@ -512,7 +520,8 @@ static NO_COPY wincaps wincap_nt4sp4 = {
   has_disk_ex_ioctls:false,
   has_working_virtual_lock:true,
   has_disabled_user_tos_setting:false,
-  has_fileid_dirinfo:false
+  has_fileid_dirinfo:false,
+  has_exclusiveaddruse:true
 };
 
 static NO_COPY wincaps wincap_2000 = {
@@ -568,7 +577,8 @@ static NO_COPY wincaps wincap_2000 = {
   has_disk_ex_ioctls:false,
   has_working_virtual_lock:true,
   has_disabled_user_tos_setting:true,
-  has_fileid_dirinfo:true
+  has_fileid_dirinfo:true,
+  has_exclusiveaddruse:true
 };
 
 static NO_COPY wincaps wincap_xp = {
@@ -624,7 +634,8 @@ static NO_COPY wincaps wincap_xp = {
   has_disk_ex_ioctls:true,
   has_working_virtual_lock:true,
   has_disabled_user_tos_setting:true,
-  has_fileid_dirinfo:true
+  has_fileid_dirinfo:true,
+  has_exclusiveaddruse:true
 };
 
 static NO_COPY wincaps wincap_2003 = {
@@ -680,7 +691,8 @@ static NO_COPY wincaps wincap_2003 = {
   has_disk_ex_ioctls:true,
   has_working_virtual_lock:true,
   has_disabled_user_tos_setting:true,
-  has_fileid_dirinfo:true
+  has_fileid_dirinfo:true,
+  has_exclusiveaddruse:true
 };
 
 static NO_COPY wincaps wincap_vista = {
@@ -736,7 +748,8 @@ static NO_COPY wincaps wincap_vista = {
   has_disk_ex_ioctls:true,
   has_working_virtual_lock:true,
   has_disabled_user_tos_setting:true,
-  has_fileid_dirinfo:true
+  has_fileid_dirinfo:true,
+  has_exclusiveaddruse:true
 };
 
 wincapc wincap __attribute__((section (".cygwin_dll_common"), shared));