From b476e75f375200f2a47e43dbf342b9be92822958 Mon Sep 17 00:00:00 2001
From: Rom Walton <rwalton@ssl.berkeley.edu>
Date: Sat, 26 Nov 2005 00:59:45 +0000
Subject: [PATCH] *** empty log message ***

svn path=/trunk/boinc/; revision=8937
---
 checkin_notes           |  9 +++++++++
 client/gui_rpc_server.C | 43 +++++++++++++++++++++++++++++++++++++++--
 client/gui_rpc_server.h |  1 +
 3 files changed, 51 insertions(+), 2 deletions(-)

diff --git a/checkin_notes b/checkin_notes
index 2bacb148e5..1aa5bd65da 100755
--- a/checkin_notes
+++ b/checkin_notes
@@ -13912,3 +13912,12 @@ David  25 Nov 2005
         client_state.C
         client_types.h
         gui_rpc_server_ops.C
+
+Rom    25 Nov 2005
+    - Bug Fix:  Curses to Windows allowing more than one application
+        to open up a listening socket to a port.  Sometimes the
+        manager was being directed to another application instead of
+        BOINC.
+        
+    client/
+        gui_rpc_server.C, .h
diff --git a/client/gui_rpc_server.C b/client/gui_rpc_server.C
index e0c011aa8e..6e8bdcdaa4 100644
--- a/client/gui_rpc_server.C
+++ b/client/gui_rpc_server.C
@@ -133,6 +133,30 @@ int GUI_RPC_CONN_SET::get_allowed_hosts() {
     return 0;
 }
 
+bool GUI_RPC_CONN_SET::is_primary_port_available() {
+    int retval;
+    int sock;
+    sockaddr_in addr;
+
+	memset(&addr, 0, sizeof(addr));
+    addr.sin_family = AF_INET;
+    addr.sin_port = htons(GUI_RPC_PORT);
+
+    if (gstate.allow_remote_gui_rpc || allowed_remote_ip_addresses.size() > 0) {
+        addr.sin_addr.s_addr = htonl(INADDR_ANY);
+    } else {
+        addr.sin_addr.s_addr = inet_addr("127.0.0.1");
+    }
+
+    boinc_socket(sock);
+    retval = connect(sock, (const sockaddr*)(&addr), sizeof(addr));
+    boinc_close_socket(sock);
+    if (retval) {
+        return true;
+    }
+    return false;
+}
+
 int GUI_RPC_CONN_SET::insert(GUI_RPC_CONN* p) {
     gui_rpcs.push_back(p);
     return 0;
@@ -154,7 +178,18 @@ int GUI_RPC_CONN_SET::init() {
     }
 
     addr.sin_family = AF_INET;
-    addr.sin_port = htons(GUI_RPC_PORT);
+
+    // On Windows our primary listening socket might be in use and Windows will
+    //   still allow us to open up a listening socket on it.  To avoid possible
+    //   connection errors with the manager we'll attempt to connect to the port
+    //   first to see if anybody is listening, if so we'll use the alternate port
+    //   instead.
+    if (is_primary_port_available()) {
+        addr.sin_port = htons(GUI_RPC_PORT);
+    } else {
+        addr.sin_port = htons(GUI_RPC_PORT_ALT);
+    }
+
 #ifdef __APPLE__
     addr.sin_addr.s_addr = htonl(INADDR_ANY);
 #else
@@ -172,7 +207,6 @@ int GUI_RPC_CONN_SET::init() {
 
     retval = bind(lsock, (const sockaddr*)(&addr), (boinc_socklen_t)sizeof(addr));
     if (retval) {
-        msg_printf(NULL, MSG_INFO, "Primary listening port already in use; using alternate listening port\n");
         addr.sin_port = htons(GUI_RPC_PORT_ALT);
         retval = bind(lsock, (const sockaddr*)(&addr), (boinc_socklen_t)sizeof(addr));
         if (retval) {
@@ -182,6 +216,11 @@ int GUI_RPC_CONN_SET::init() {
             return ERR_BIND;
         }
     }
+
+    if (addr.sin_port == htons(GUI_RPC_PORT_ALT)) {
+        msg_printf(NULL, MSG_INFO, "Primary listening port was already in use; using alternate listening port\n");
+    }
+
     retval = listen(lsock, 999);
     if (retval) {
         msg_printf(NULL, MSG_ERROR, "GUI RPC listen failed: %d\n", retval);
diff --git a/client/gui_rpc_server.h b/client/gui_rpc_server.h
index 202e108b12..af4bfafea4 100644
--- a/client/gui_rpc_server.h
+++ b/client/gui_rpc_server.h
@@ -45,6 +45,7 @@ class GUI_RPC_CONN_SET {
 
     int get_allowed_hosts();
     int get_password();
+    bool is_primary_port_available();
     int insert(GUI_RPC_CONN*);
 public:
     GUI_RPC_CONN_SET();