From a88236aee36407852f74744668288719e603fa7c Mon Sep 17 00:00:00 2001
From: dwj0 <45187345+dwj0@users.noreply.github.com>
Date: Sat, 11 Jun 2022 21:38:44 +0800
Subject: [PATCH] modified scan_address() fixing possible netmask bitlen error
 when -a provided IP address lacks slash (#1012)

---
 src/edge.c | 13 +++++--------
 1 file changed, 5 insertions(+), 8 deletions(-)

diff --git a/src/edge.c b/src/edge.c
index 428f37d..3aa969a 100644
--- a/src/edge.c
+++ b/src/edge.c
@@ -105,17 +105,14 @@ static int scan_address (char * ip_addr, size_t addr_size,
     if(!end)
         // no slash present -- default end
         end = s + strlen(s);
+    else
+	// slash is present. now, handle the sub-network address
+	sscanf(end + 1, "%u", &bitlen);
 
     strncpy(ip_addr, start, (size_t)MIN(end - start, addr_size - 1)); // ensure NULL term
 
-    if(end) {
-        // slash is present
-
-        // now, handle the sub-network address
-        sscanf(end + 1, "%u", &bitlen);
-        bitlen = htobe32(bitlen2mask(bitlen));
-        inet_ntop(AF_INET, &bitlen, netmask, netmask_size);
-    }
+    bitlen = htobe32(bitlen2mask(bitlen));
+    inet_ntop(AF_INET, &bitlen, netmask, netmask_size);
 
     return retval;
 }