Accepted patch #5493 IP frag/reass config item tweak.

CHANGELOG

@@ -27,6 +27,13 @@ HISTORY
 
   ++ New features:
 
+  2006-10-26 Christiaan Simons (accepted patch by Jonathan Larmour)
+  * src/core/ipv4/ip_frag.c: rename MAX_MTU to IP_FRAG_MAX_MTU and move define
+    to include/lwip/opt.h.
+  * include/ipv4/lwip/ip_frag.h: Remove unused IP_REASS_INTERVAL.
+    Move IP_REASS_MAXAGE and IP_REASS_BUFSIZE to include/lwip/opt.h.
+  * include/lwip/opt.h: Add above new options.
+
   2006-08-18 Christiaan Simons
   * tcp_{in,out}.c: added SNMP counters.
   * ipv4/ip.c: added SNMP counters.

src/core/ipv4/ip_frag.c

@@ -298,8 +298,7 @@ nullreturn:
   return NULL;
 }
 
-#define MAX_MTU 1500
+static u8_t buf[MEM_ALIGN_SIZE(IP_FRAG_MAX_MTU)];
-static u8_t buf[MEM_ALIGN_SIZE(MAX_MTU)];
 
 /**
  * Fragment an IP datagram if too large for the netif.

src/include/ipv4/lwip/ip_frag.h

@@ -39,19 +39,6 @@
 #include "lwip/netif.h"
 #include "lwip/ip_addr.h"
 
-/* IP reassemly timer interval in milliseconds */
-#define IP_REASS_INTERVAL 1000
-
-/* IP reassemly default age in seconds */
-#ifndef IP_REASS_MAXAGE
-#define IP_REASS_MAXAGE 3
-#endif
-
-/* IP reassembly buffer size (minus IP header) */
-#ifndef IP_REASS_BUFSIZE
-#define IP_REASS_BUFSIZE 5760
-#endif
-
 void ip_frag_init(void);
 void ip_reass_tmr(void);
 struct pbuf * ip_reass(struct pbuf *p);

src/include/lwip/opt.h

@@ -216,6 +216,21 @@ a lot of data that needs to be copied, this should be set high. */
 #define IP_FRAG                         1
 #endif
 
+/* IP reassemly default age in seconds */
+#ifndef IP_REASS_MAXAGE
+#define IP_REASS_MAXAGE 3
+#endif
+
+/* IP reassembly buffer size (minus IP header) */
+#ifndef IP_REASS_BUFSIZE
+#define IP_REASS_BUFSIZE 5760
+#endif
+
+/* Assumed max MTU on any interface for IP frag buffer */
+#ifndef IP_FRAG_MAX_MTU
+#define IP_FRAG_MAX_MTU 1500
+#endif
+
 /** Global default value for Time To Live used by transport layers. */
 #ifndef IP_DEFAULT_TTL
 #define IP_DEFAULT_TTL                  255