From f6bcdccf9cae1bd88ab1629f824e88017481ed51 Mon Sep 17 00:00:00 2001
From: Junaid Saeed Uppal <junaid.uppal@gmail.com>
Date: Tue, 23 Dec 2025 21:13:38 +0500
Subject: [PATCH] Workaround CGRateS MS-CHAPv2 bug - use *event instead of
 *radauth
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CGRateS has a bug where *radauth + *mschapv2 looks for MS-CHAP-Response
(attribute 1) instead of MS-CHAP2-Response (attribute 25).
MikroTik sends MS-CHAP2-Response, causing MANDATORY_IE_MISSING error.

This workaround uses *event + *attributes to validate user existence
via attributes subsystem. The actual password validation is NOT done
server-side - MikroTik will handle MS-CHAPv2 locally.

TODO: Report bug to CGRateS - librad.go line 130 should use
MS-CHAP2-Response for MetaMSCHAPV2 case.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
---
 cgrates.json | 20 ++++----------------
 1 file changed, 4 insertions(+), 16 deletions(-)

diff --git a/cgrates.json b/cgrates.json
index a3aaf15..6254984 100644
--- a/cgrates.json
+++ b/cgrates.json
@@ -82,27 +82,15 @@
 	},
 	"request_processors": [
 		{
-			"id": "MSCHAPv2GetPassword",
+			"id": "PPPoEAuth",
 			"filters": ["*string:~*vars.*radReqType:*radAuth"],
-			"flags": ["*authorize", "*attributes", "*continue", "*log"],
+			"flags": ["*event", "*attributes", "*log"],
 			"request_fields": [
 				{"tag": "Account", "path": "*cgreq.Account", "type": "*composed", "value": "~*req.User-Name", "mandatory": true}
 			],
 			"reply_fields": [
-				{"tag": "SessionTimeout", "path": "*rep.Session-Timeout", "type": "*constant", "value": "3600"}
-			]
-		},
-		{
-			"id": "MSCHAPv2Auth",
-			"filters": ["*string:~*vars.*radReqType:*radAuth"],
-			"flags": ["*radauth", "*mschapv2", "*log"],
-			"request_fields": [
-				{"tag": "UserPassword", "path": "*vars.UserPassword", "type": "*variable", "value": "~*cgrep.Attributes.Password"}
-			],
-			"reply_fields": [
-				{"tag": "RemoveAddedFields", "filters": ["*notempty:~*cgrep.Error:"], "type": "*removeall", "path": "*rep"},
-				{"tag": "Code", "path": "*rep.*radReplyCode", "filters": ["*notempty:~*cgrep.Error:"], "type": "*constant", "value": "AccessReject"},
-				{"tag": "ReplyMessage", "path": "*rep.Reply-Message", "filters": ["*notempty:~*cgrep.Error:"], "type": "*variable", "value": "~*cgrep.Error"}
+				{"tag": "SessionTimeout", "path": "*rep.Session-Timeout", "type": "*constant", "value": "3600"},
+				{"tag": "AcctInterimInterval", "path": "*rep.Acct-Interim-Interval", "type": "*constant", "value": "60"}
 			]
 		}
 	]