etharp: fix using ARP_TABLE_SIZE >= 0x80

8 years ago · 596f742066
1 changed files with 2 additions and 2 deletions
--- a/src/core/ipv4/etharp.c
+++ b/src/core/ipv4/etharp.c
@ -125,8 +125,8 @@ static netif_addr_idx_t etharp_cached_entry;


 /* Check for maximum ARP_TABLE_SIZE */
-#if (ARP_TABLE_SIZE > 0x7f)
-#error "ARP_TABLE_SIZE must fit in an s8_t, you have to reduce it in your lwipopts.h"
+#if (ARP_TABLE_SIZE > NETIF_ADDR_IDX_MAX)
+#error "ARP_TABLE_SIZE must fit in an s16_t, you have to reduce it in your lwipopts.h"
 #endif