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fix(web): haveCustomHostValue causes warnings on intranet access (#601)

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Improved access source detection; added support for localhost and Loopback IPV6 access sources
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komori-flag 2024-07-07 15:04:44 +08:00 committed by GitHub
parent 0a2a00ca9f
commit 58ffeb3d95
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1 changed files with 65 additions and 4 deletions
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69
BililiveRecorder.Web/OpenAccessWarningMiddleware.cs
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@ -60,7 +60,11 @@ namespace BililiveRecorder.Web
{
var ip = context.Connection.RemoteIpAddress;
if (ip is null) return true;
return !isLocalIpv4Address(ip) && !ip.IsIPv6LinkLocal && !ip.IsIPv6UniqueLocal;
return
!isLocalIpv4Address(ip) && // LAN IPV4 and loopback IPV4
!isLoopbackAddress(ip) && // loopback IPV4/IPV6
!ip.IsIPv6LinkLocal && // link-local IPV6
!ip.IsIPv6UniqueLocal; // unique-local IPV6
}
private static bool isLocalIpv4Address(IPAddress ip)
@ -89,12 +93,22 @@ namespace BililiveRecorder.Web
}
}
private static bool isLoopbackAddress(IPAddress ip)
{
if (ip.AddressFamily is System.Net.Sockets.AddressFamily.InterNetworkV6 ||
ip.AddressFamily is System.Net.Sockets.AddressFamily.InterNetwork)
return IPAddress.IsLoopback(ip);
return false;
}
private static bool haveReverseProxyHeaders(HttpContext context)
{
return
context.Request.Headers.ContainsKey("X-Real-IP") ||
context.Request.Headers.ContainsKey("X-Forwarded-For") ||
context.Request.Headers.ContainsKey("X-Forwarded-Host") ||
context.Request.Headers.ContainsKey("X-Forwarded-Proto") ||
context.Request.Headers.ContainsKey("Via");
}
@ -103,10 +117,57 @@ namespace BililiveRecorder.Web
// check if the host header is set to a custom value such as a domain name
if (IPAddress.TryParse(context.Request.Host.Host, out var ip))
{
// the host header is an IP address
// check if the IP address matches the server's IP address
return ip.Equals(context.Connection.LocalIpAddress);
var localIP = context.Connection.LocalIpAddress;
if (localIP is null) return true;
if (localIP.IsIPv4MappedToIPv6)
localIP = localIP.MapToIPv4();
// Request.Host.Host and ip is IPV6
if (ip.AddressFamily == System.Net.Sockets.AddressFamily.InterNetworkV6 &&
localIP.AddressFamily == System.Net.Sockets.AddressFamily.InterNetworkV6)
{
// ip and localIP is Loopback IP
if (isLoopbackAddress(ip) && isLoopbackAddress(localIP))
return !ip.Equals(localIP);
return
!ip.Equals(localIP) ||
!ip.IsIPv6UniqueLocal ||
!localIP.IsIPv6UniqueLocal;
}
/*
* 判断 ip 与 localIp 是否为 LAN IP 或 保留 IP
* 1. 判断 ip 与 localIp 是否相同
* 2. 判断 ip 是否为 LAN IP 或 保留 IP
* 3. 判断 localIp 是否为 LAN IP 或 保留 IP
*/
return
!ip.Equals(localIP) ||
!isLocalIpv4Address(ip) ||
!isLocalIpv4Address(localIP);
}
// check if the host header is set to "localhost" IP address
if (context.Request.Host.Host.Equals("localhost"))
{
if (context.Connection.RemoteIpAddress is null || context.Connection.LocalIpAddress is null)
return true;
/*
* 判断是否为本机访问本机环回地址
* 1. RemoteIp 与 LocalIp 是否相同
* 2. RemoteIp 是否为本机环回地址
* 3. LocalIp 是否为本机环回地址
*/
return
!context.Connection.RemoteIpAddress.Equals(context.Connection.LocalIpAddress) ||
!isLoopbackAddress(context.Connection.RemoteIpAddress) ||
!isLoopbackAddress(context.Connection.LocalIpAddress);
}
// the host header is not an IP address
return true;
}