From: Roy Marples <roy@marples.name>
Date: Wed, 5 Feb 2020 14:38:04 +0000 (+0000)
Subject: ARP: Recalculate ARP buffer taking into account max frame length
X-Git-Tag: v9.0.0~62
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=87f6681838d8dfadd8ed9fd7995695b4b4ece742;p=thirdparty%2Fdhcpcd.git

ARP: Recalculate ARP buffer taking into account max frame length
---

diff --git a/src/arp.c b/src/arp.c
index 8f5e5c64..8c6acea9 100644
--- a/src/arp.c
+++ b/src/arp.c
@@ -56,8 +56,9 @@
 #include "privsep.h"
 
 #if defined(ARP)
-#define ARP_LEN								      \
-	(sizeof(struct arphdr) + (2 * sizeof(uint32_t)) + (2 * HWADDR_LEN))
+#define ARP_LEN								\
+	(FRAMEHDRLEN_MAX +						\
+	 sizeof(struct arphdr) + (2 * sizeof(uint32_t)) + (2 * HWADDR_LEN))
 
 /* ARP debugging can be quite noisy. Enable this for more noise! */
 //#define	ARP_DEBUG
diff --git a/src/if.h b/src/if.h
index e24a77a3..0656affe 100644
--- a/src/if.h
+++ b/src/if.h
@@ -92,7 +92,8 @@ typedef unsigned long		ioctl_request_t;
 
 /* Maximum frame length.
  * Support jumbo frames and some extra. */
-#define	FRAMELEN_MAX			10240
+#define	FRAMEHDRLEN_MAX			14	/* only ethernet support */
+#define	FRAMELEN_MAX			(FRAMEHDRLEN_MAX + 9216)
 
 /* Work out if we have a private address or not
  * 10/8