From cd1a7de0f2d09a1d5286c247cc30374abf1b69e7 Mon Sep 17 00:00:00 2001
From: Jon Shallow <supjps-libcoap@jpshallow.com>
Date: Tue, 17 Oct 2023 13:50:15 +0100
Subject: [PATCH] coap_address.c: Broadcast address cannot be local IP address

---
 src/coap_address.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/coap_address.c b/src/coap_address.c
index 2dabb366..0a317c55 100644
--- a/src/coap_address.c
+++ b/src/coap_address.c
@@ -219,7 +219,8 @@ coap_is_bcast(const coap_address_t *a) {
       if (ife->ifa_addr && ife->ifa_addr->sa_family == AF_INET &&
           ife->ifa_flags & IFF_BROADCAST) {
         b_ipv4[bcst_cnt].s_addr = ((struct sockaddr_in *)ife->ifa_broadaddr)->sin_addr.s_addr;
-        bcst_cnt++;
+        if (b_ipv4[bcst_cnt].s_addr != ipv4.s_addr)
+          bcst_cnt++;
       }
       ife = ife->ifa_next;
     }