From c64cb19861035ca541eda27f9f80b70baa1dfee6 Mon Sep 17 00:00:00 2001
From: Gregory Nutt <gnutt@nuttx.org>
Date: Mon, 17 Nov 2014 17:16:46 -0600
Subject: [PATCH] Move IP header flags from tcp.h to ip.h and rename IP_FLAGS
 vs TCPFLAGS.  The problem fixed here is that there IP flags were not
 available when TCP was disabled.  The IP flags are used in ICMP and IGFMP

---
 include/nuttx/net/ip.h  | 20 +++++++++++++-------
 include/nuttx/net/tcp.h |  6 ------
 net/devif/devif_input.c |  2 +-
 net/icmp/icmp_send.c    |  4 ++--
 net/igmp/igmp_send.c    |  4 ++--
 5 files changed, 18 insertions(+), 18 deletions(-)

diff --git a/include/nuttx/net/ip.h b/include/nuttx/net/ip.h
index 2012150a3a4..e316b96ad6e 100644
--- a/include/nuttx/net/ip.h
+++ b/include/nuttx/net/ip.h
@@ -64,18 +64,24 @@
  ****************************************************************************/
 /* Values for the IP protocol field */
 
-#define IP_PROTO_ICMP  1
-#define IP_PROTO_IGMP  2
-#define IP_PROTO_TCP   6
-#define IP_PROTO_UDP   17
-#define IP_PROTO_ICMP6 58
+#define IP_PROTO_ICMP     1
+#define IP_PROTO_IGMP     2
+#define IP_PROTO_TCP      6
+#define IP_PROTO_UDP      17
+#define IP_PROTO_ICMP6    58
+
+/* Flag bits in 16-bit flags + fragment offset IPv4 header field */
+
+#define IP_FLAG_RESERVED  0x8000
+#define IP_FLAG_DONTFRAG  0x4000
+#define IP_FLAG_MOREFRAGS 0x2000
 
 /* Header sizes */
 
 #ifdef CONFIG_NET_IPv6
-# define IP_HDRLEN     40    /* Size of IP header */
+# define IP_HDRLEN        40    /* Size of IP header */
 #else
-# define IP_HDRLEN     20    /* Size of IP header */
+# define IP_HDRLEN        20    /* Size of IP header */
 #endif
 
 /****************************************************************************
diff --git a/include/nuttx/net/tcp.h b/include/nuttx/net/tcp.h
index db511cee99d..53692d389a6 100644
--- a/include/nuttx/net/tcp.h
+++ b/include/nuttx/net/tcp.h
@@ -95,12 +95,6 @@
 #  define TCP_STOPPED     0x10 /* Bit 4: stopped */
                                /* Bit 5-7: Unused, but not available */
 
-/* Flag bits in 16-bit flags+ipoffset IPv4 TCP header field */
-
-#define TCPFLAG_RESERVED  0x8000
-#define TCPFLAG_DONTFRAG  0x4000
-#define TCPFLAG_MOREFRAGS 0x2000
-
 /* TCP header sizes */
 
 #define TCP_HDRLEN        20                       /* Size of TCP header */
diff --git a/net/devif/devif_input.c b/net/devif/devif_input.c
index bba58be93d4..7a5142add68 100644
--- a/net/devif/devif_input.c
+++ b/net/devif/devif_input.c
@@ -112,7 +112,7 @@
 
 /* IP fragment re-assembly */
 
-#define IP_MF                0x20
+#define IP_MF                0x20  /* See IP_FLAG_MOREFRAGS */
 #define TCP_REASS_BUFSIZE    (NET_DEV_MTU(dev) - NET_LL_HDRLEN(dev))
 #define TCP_REASS_LASTFRAG   0x01
 
diff --git a/net/icmp/icmp_send.c b/net/icmp/icmp_send.c
index be6621839d4..243b05d6069 100644
--- a/net/icmp/icmp_send.c
+++ b/net/icmp/icmp_send.c
@@ -136,8 +136,8 @@ void icmp_send(FAR struct net_driver_s *dev, FAR net_ipaddr_t *destaddr)
       ++g_ipid;
       picmp->ipid[0]     = g_ipid >> 8;
       picmp->ipid[1]     = g_ipid & 0xff;
-      picmp->ipoffset[0] = TCPFLAG_DONTFRAG >> 8;
-      picmp->ipoffset[1] = TCPFLAG_DONTFRAG & 0xff;
+      picmp->ipoffset[0] = IP_FLAG_DONTFRAG >> 8;
+      picmp->ipoffset[1] = IP_FLAG_DONTFRAG & 0xff;
       picmp->ttl         = IP_TTL;
       picmp->proto       = IP_PROTO_ICMP;
 
diff --git a/net/igmp/igmp_send.c b/net/igmp/igmp_send.c
index cc5430f905d..189f9cfc3f3 100644
--- a/net/igmp/igmp_send.c
+++ b/net/igmp/igmp_send.c
@@ -150,8 +150,8 @@ void igmp_send(FAR struct net_driver_s *dev, FAR struct igmp_group_s *group,
   ++g_ipid;
   IGMPBUF->ipid[0]     = g_ipid >> 8;
   IGMPBUF->ipid[1]     = g_ipid & 0xff;
-  IGMPBUF->ipoffset[0] = TCPFLAG_DONTFRAG >> 8;
-  IGMPBUF->ipoffset[1] = TCPFLAG_DONTFRAG & 0xff;
+  IGMPBUF->ipoffset[0] = IP_FLAG_DONTFRAG >> 8;
+  IGMPBUF->ipoffset[1] = IP_FLAG_DONTFRAG & 0xff;
   IGMPBUF->ttl         = IGMP_TTL;
   IGMPBUF->proto       = IP_PROTO_IGMP;