From df767e58db37c175de07b4afeecefe7df14242cd Mon Sep 17 00:00:00 2001
From: Yalu Zhang <yalu.zhang@iopsys.eu>
Date: Mon, 21 Sep 2020 16:34:15 +0200
Subject: [PATCH] Prevent generating false call logs (CDR's)
(cherry picked from commit 629000dcb4711891902fb448a443500dab4c4196 on branch iopsys-16.3)
---
main/cdr.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/main/cdr.c b/main/cdr.c
index e862caffe2..6a823a9807 100644
--- a/main/cdr.c
+++ b/main/cdr.c
@@ -3524,6 +3524,20 @@ static void post_cdr(struct ast_cdr *cdr)
continue;
}
+ /*
+ * When Asterisk receives an SIP-INVITE from an unknown source, a CDR is generated. The workaround below
+ * is trying to skip this kind of CDR. Otherwise a large number of invalid CDRs will be generated.
+ *
+ * TODO: In future, SIP user agent will receive requests from the configured source(s) only, i.e. proxy
+ * or registrar only. SIP request messages from unwanted sources will be dropped silently without any
+ * further processing.
+ */
+ if (strcasecmp(cdr->dcontext, "call_line") == 0 && strcasecmp(cdr->lastapp, "Goto") == 0 &&
+ cdr->disposition == AST_CDR_FAILED) {
+ ast_debug(1, "Skipping CDR because it might be caused by an incoming call from an unwanted source\n");
+ continue;
+ }
+
/* Modify CDR's */
AST_RWLIST_RDLOCK(&mo_list);
AST_RWLIST_TRAVERSE(&mo_list, i, list) {
--
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