[PATCH] net: convert NET_MAXDEFRAG to Kconfig

[Rasmus Villemoes <rasmus.villemoes@prevas.dk>]

Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
---
 net/Kconfig                  | 10 ++++++++++
 net/net.c                    |  3 ---
 scripts/config_whitelist.txt |  1 -
 3 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/net/Kconfig b/net/Kconfig
index a07f6746c5..96bbce1778 100644
--- a/net/Kconfig
+++ b/net/Kconfig
@@ -29,6 +29,16 @@ config IP_DEFRAG
 	  Selecting this will enable IP datagram reassembly according
 	  to the algorithm in RFC815.
 
+config NET_MAXDEFRAG
+	int "Size of buffer used for IP datagram reassembly"
+	depends on IP_DEFRAG
+	default 16384
+	range 1024 65536
+	help
+	  This defines the size of the statically allocated buffer
+	  used for reassembly, and thus an upper bound for the size of
+	  IP datagrams that can be received.
+
 config TFTP_BLOCKSIZE
 	int "TFTP block size"
 	default 1468
diff --git a/net/net.c b/net/net.c
index 5199d679a1..322b1f81bf 100644
--- a/net/net.c
+++ b/net/net.c
@@ -882,9 +882,6 @@ int net_send_ip_packet(uchar *ether, struct in_addr dest, int dport, int sport,
  * to the algorithm in RFC815. It returns NULL or the pointer to
  * a complete packet, in static storage
  */
-#ifndef CONFIG_NET_MAXDEFRAG
-#define CONFIG_NET_MAXDEFRAG 16384
-#endif
 #define IP_PKTSIZE (CONFIG_NET_MAXDEFRAG)
 
 #define IP_MAXUDP (IP_PKTSIZE - IP_HDR_SIZE)
diff --git a/scripts/config_whitelist.txt b/scripts/config_whitelist.txt
index cf1808e051..669d0bf65d 100644
--- a/scripts/config_whitelist.txt
+++ b/scripts/config_whitelist.txt
@@ -1226,7 +1226,6 @@ CONFIG_NETSPACE_LITE_V2
 CONFIG_NETSPACE_MAX_V2
 CONFIG_NETSPACE_MINI_V2
 CONFIG_NETSPACE_V2
-CONFIG_NET_MAXDEFRAG
 CONFIG_NET_MULTI
 CONFIG_NET_RETRY_COUNT
 CONFIG_NEVER_ASSERT_ODT_TO_CPU
-- 
2.23.0