Added server protocol version check.

diff --git a/include/server.h b/include/server.h
index 28c5199..5f47c18 100644
--- a/include/server.h
+++ b/include/server.h

@@ -188,6 +188,7 @@
     OUT void*        pid;          /* process id of the new thread's process */
     OUT void*        tid;          /* thread id of the new thread */
     OUT int          boot;         /* is this the boot thread? */
+    OUT int          version;      /* protocol version */
 };
 
 
@@ -1185,6 +1186,8 @@
     REQ_NB_REQUESTS
 };
 
+#define SERVER_PROTOCOL_VERSION 1
+
 /* ### make_requests end ### */
 /* Everything above this line is generated automatically by tools/make_requests */
 

diff --git a/scheduler/client.c b/scheduler/client.c
index 27d4d1b..e78c92d 100644
--- a/scheduler/client.c
+++ b/scheduler/client.c

@@ -467,6 +467,12 @@
     first_req = teb->buffer;
     teb->process->server_pid = first_req->pid;
     teb->tid = first_req->tid;
+    if (first_req->version != SERVER_PROTOCOL_VERSION)
+        server_protocol_error( "version mismatch %d/%d.\n"
+                               "Your %s binary was not upgraded correctly,\n"
+                               "or you have an older one somewhere in your PATH.\n",
+                               first_req->version, SERVER_PROTOCOL_VERSION,
+                               (first_req->version > SERVER_PROTOCOL_VERSION) ? "wine" : "wineserver" );
     if (first_req->boot) boot_thread_id = teb->tid;
     else if (boot_thread_id == teb->tid) boot_thread_id = 0;
 

diff --git a/server/thread.c b/server/thread.c
index 14d7ea6..8f30280 100644
--- a/server/thread.c
+++ b/server/thread.c

@@ -104,6 +104,7 @@
     req->pid  = get_process_id( thread->process );
     req->tid  = get_thread_id( thread );
     req->boot = (thread == booting_thread);
+    req->version = SERVER_PROTOCOL_VERSION;
     set_reply_fd( thread, fd );
     send_reply( thread );
     return 1;

diff --git a/server/trace.c b/server/trace.c
index 2bdecde..eaf4793 100644
--- a/server/trace.c
+++ b/server/trace.c

@@ -282,7 +282,8 @@
 {
     fprintf( stderr, " pid=%p,", req->pid );
     fprintf( stderr, " tid=%p,", req->tid );
-    fprintf( stderr, " boot=%d", req->boot );
+    fprintf( stderr, " boot=%d,", req->boot );
+    fprintf( stderr, " version=%d", req->version );
 }
 
 static void dump_terminate_process_request( const struct terminate_process_request *req )

diff --git a/tools/make_requests b/tools/make_requests
index 8e608cc..9e84e79 100755
--- a/tools/make_requests
+++ b/tools/make_requests

@@ -30,10 +30,12 @@
 ### Parse server.h to find request/reply structure definitions
 
 my @trace_lines = ();
+my $protocol = 0;  # server protocol version
 
 while (<SERVER>)
 {
     if (/^struct +(\w+)_request/) { &DO_REQUEST($1); }
+    if (/^\#define SERVER_PROTOCOL_VERSION (\d+)/) { $protocol = $1 + 1; }
 }
 
 ### Output the dumping function tables
@@ -68,6 +70,7 @@
 push @server_lines, "enum request\n{\n";
 foreach $req (@requests) { push @server_lines, "    REQ_\U$req,\n"; }
 push @server_lines, "    REQ_NB_REQUESTS\n};\n";
+push @server_lines, "\n#define SERVER_PROTOCOL_VERSION $protocol\n";
 
 REPLACE_IN_FILE( "include/server.h", @server_lines );