From 24b9150c15d86a497da1f4ce20dee8adf593d396 Mon Sep 17 00:00:00 2001
From: Matej Gradisar <gradisar@iskratel.si>
Date: Wed, 28 Feb 2024 12:24:53 +0100
Subject: [PATCH] [SMF] Check config file for overlapping UE subnets for
 subnets with no DNN

---
 lib/pfcp/context.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/pfcp/context.c b/lib/pfcp/context.c
index 401204ece..352e04df2 100644
--- a/lib/pfcp/context.c
+++ b/lib/pfcp/context.c
@@ -154,7 +154,9 @@ static int ogs_pfcp_check_subnet_overlapping(void)
     ogs_list_for_each(&self.subnet_list, subnet){
         for (next_subnet = ogs_list_next(subnet); (next_subnet);
                 next_subnet = ogs_list_next(next_subnet)) {
-            if (strcmp(subnet->dnn, next_subnet->dnn) == 0 &&
+            if ((strlen(subnet->dnn) == 0 ||
+                 strlen(next_subnet->dnn) == 0 ||
+                (strcmp(subnet->dnn, next_subnet->dnn)) == 0) &&
                 subnet->gw.family == next_subnet->gw.family) {
                 uint32_t *addr1 = subnet->sub.sub;
                 uint32_t *addr2 = next_subnet->sub.sub;