Move net/uip/uip_checksum.c to net/utils/net_chksum.c; fix missing Make.defs include in net/Makefile

net/Makefile

@@ -94,6 +94,7 @@ include udp/Make.defs
 include pkt/Make.defs
 include uip/Make.defs
 include route/Make.defs
+include utils/Make.defs
 endif
 
 ASRCS		= $(SOCK_ASRCS) $(NETDEV_ASRCS) $(NET_ASRCS)

net/uip/Make.defs

@@ -38,7 +38,7 @@ ifeq ($(CONFIG_NET),y)
 # Common IP source files
 
 NET_CSRCS += uip_initialize.c uip_setipid.c uip_input.c uip_send.c
-NET_CSRCS += uip_poll.c uip_chksum.c uip_callback.c
+NET_CSRCS += uip_poll.c uip_callback.c
 
 # I/O buffer chain support required?
 

net/utils/Make.defs

@@ -35,7 +35,7 @@
 
 ifeq ($(CONFIG_NET),y)
 
-NET_CSRCS += net_dsec2timeval.c 
+NET_CSRCS += net_dsec2timeval.c net_chksum.c
 
 # Non-interrupt level support required?
 
@@ -49,4 +49,3 @@ DEPPATH += --dep-path utils
 VPATH += :utils
 
 endif
-endif

net/utils/net_chksum.c

@@ -1,5 +1,5 @@
 /****************************************************************************
- * net/uip/uip_chksum.c
+ * net/utils/net_chksum.c
  *
  *   Copyright (C) 2007-2010, 2012 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <gnutt@nuttx.org>
@@ -48,7 +48,7 @@
 #include <nuttx/net/netdev.h>
 #include <nuttx/net/icmp.h>
 
-#include "uip/uip.h"
+#include "utils/utils.h"
 
 /****************************************************************************
  * Pre-processor Definitions
@@ -142,10 +142,6 @@ static uint16_t icmp_6chksum(FAR struct uip_driver_s *dev)
 
 #endif /* UIP_ARCH_CHKSUM */
 
-/****************************************************************************
- * Public Functions
- ****************************************************************************/
-
 /* Calculate the Internet checksum over a buffer. */
 
 #if !UIP_ARCH_ADD32
@@ -174,6 +170,10 @@ static inline void uip_carry32(FAR uint8_t *sum, uint16_t op16)
     }
 }
 
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
 void uip_incr32(FAR uint8_t *op32, uint16_t op16)
 {
   op32[3] += (op16 & 0xff);

net/utils/utils.h

@@ -84,6 +84,7 @@ extern "C"
  *
  ****************************************************************************/
 
+struct timeval;
 void net_dsec2timeval(uint16_t dsec, FAR struct timeval *tv);
 
 #undef EXTERN