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Improve: Park duplicate online connections as standby, promote on old removal

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Replacing the old connection on a duplicate login made the client
reconnect in a tight loop. Instead, park the new connection in a standby
list keyed by clientID and promote it into the main host list only after
the old connection is removed by heartbeat timeout or disconnect.

Fix heartbeat attribution so a parked standby refreshes its own
last-heartbeat time rather than the main connection's, otherwise the main
never times out and the standby can never take over. Gate the offline
notification on an actual removal with no promoted standby to avoid a
spurious "host offline" when takeover happens. Skip promoting a standby
already marked removed, and reuse the normal login sign/settings path when
a standby is promoted.

Co-Authored-By: deepseek-v4-pro
This commit is contained in:
yuanyuanxiang
2026-08-21 19:35:43 +02:00
parent d359148841
commit 8de5c00a39
7 changed files with 144 additions and 27 deletions
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25
client/Manager.cpp
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@@ -119,21 +119,38 @@ HDESK OpenActiveDesktop(ACCESS_MASK dwDesiredAccess)
HDESK hInputDesktop = OpenInputDesktop(0, FALSE, dwDesiredAccess);
if (!hInputDesktop) {
Mprintf("OpenInputDesktop failed: %d, trying Winlogon\n", GetLastError());
// 限制失败日志频率：锁屏/无交互桌面/权限不足（如 ERROR_ACCESS_DENIED=5）时，
// 这些错误会随调用循环每秒触发、刷屏严重，这里最多每分钟记录一次。
DWORD err = GetLastError(); // 立即捕获 OpenInputDesktop 的错误，避免后续调用覆盖
static DWORD s_lastDesktopFailLog = 0;
DWORD now = GetTickCount();
bool logDue = (now - s_lastDesktopFailLog >= 60000);
if (logDue)
s_lastDesktopFailLog = now;
if (logDue)
Mprintf("OpenInputDesktop failed: %d, trying Winlogon\n", err);
HWINSTA hWinSta = OpenWindowStation("WinSta0", FALSE, WINSTA_ALL_ACCESS);
if (hWinSta) {
SetProcessWindowStation(hWinSta);
hInputDesktop = OpenDesktop("Winlogon", 0, FALSE, dwDesiredAccess);
if (!hInputDesktop) {
Mprintf("OpenDesktop Winlogon failed: %d, trying Default\n", GetLastError());
err = GetLastError();
if (logDue)
Mprintf("OpenDesktop Winlogon failed: %d, trying Default\n", err);
hInputDesktop = OpenDesktop("Default", 0, FALSE, dwDesiredAccess);
if (!hInputDesktop) {
Mprintf("OpenDesktop Default failed: %d\n", GetLastError());
err = GetLastError();
if (logDue)
Mprintf("OpenDesktop Default failed: %d\n", err);
}
}
} else {
Mprintf("OpenWindowStation failed: %d\n", GetLastError());
err = GetLastError();
if (logDue)
Mprintf("OpenWindowStation failed: %d\n", err);
}
}
return hInputDesktop;