From 9b2f8a33b6b247d4232d48a1d18aea3769590083 Mon Sep 17 00:00:00 2001
From: "Leon M. Busch-George" <leon@georgemail.eu>
Date: Fri, 16 Jun 2023 14:56:39 +0200
Subject: [PATCH] base-files: ipcalc.sh: correctly set limit for prefix > 30

For /31 and /32 prefixes, there are only host addresses - no network and
broadcast address with all-zero and all-one bits.
Reflect this when setting the limit.

Signed-off-by: Leon M. Busch-George <leon@georgemail.eu>
---
 package/base-files/files/bin/ipcalc.sh | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/package/base-files/files/bin/ipcalc.sh b/package/base-files/files/bin/ipcalc.sh
index 21f84bcaf2..c852b5163f 100755
--- a/package/base-files/files/bin/ipcalc.sh
+++ b/package/base-files/files/bin/ipcalc.sh
@@ -64,13 +64,21 @@ BEGIN {
 	if (ARGC <= 3)
 		exit(0)
 
+	if (prefix<=30)
+		limit=network+1
+	else
+		limit=network
+
 	start=or(network,and(ip2int(ARGV[3]),compl32(netmask)))
-	limit=network+1
 	if (start<limit) start=limit
 	if (start==ipaddr) start=ipaddr+1
 
+	if (prefix<=30)
+		limit=or(network,compl32(netmask))-1
+	else
+		limit=or(network,compl32(netmask))
+
 	end=start+ARGV[4]-1
-	limit=or(network,compl32(netmask))-1
 	if (end>limit) end=limit
 	if (end==ipaddr) end=ipaddr-1
 
-- 
2.30.2