[U-Boot] [PATCH 1/2] net: Define IP flag field values

[Peter Tyser]

These defines were pulled from the "Add simple
IP/UDP fragmentation support" patch from Frank
Haverkamp <[EMAIL PROTECTED]>.
---
 include/net.h |    6 ++++++
 net/net.c     |    6 +++---
 2 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/include/net.h b/include/net.h
index a5a256b..199872e 100644
--- a/include/net.h
+++ b/include/net.h
@@ -200,6 +200,12 @@ typedef struct {
        ushort          udp_xsum;       /* Checksum                     */
 } IP_t;
 
+#define IP_OFFS                0x1fff /* ip offset *= 8 */
+#define IP_FLAGS       0xe000 /* first 3 bits */
+#define IP_FLAGS_RES   0x8000 /* reserved */
+#define IP_FLAGS_DFRAG 0x4000 /* don't fragments */
+#define IP_FLAGS_MFRAG 0x2000 /* more fragments */
+
 #define IP_HDR_SIZE_NO_UDP     (sizeof (IP_t) - 8)
 #define IP_HDR_SIZE            (sizeof (IP_t))
 
diff --git a/net/net.c b/net/net.c
index 77e83b5..cf1f4fa 100644
--- a/net/net.c
+++ b/net/net.c
@@ -735,7 +735,7 @@ int PingSend(void)
        ip->ip_tos   = 0;
        ip->ip_len   = htons(IP_HDR_SIZE_NO_UDP + 8);
        ip->ip_id    = htons(NetIPID++);
-       ip->ip_off   = htons(0x4000);   /* No fragmentation */
+       ip->ip_off   = htons(IP_FLAGS_DFRAG);   /* Don't fragment */
        ip->ip_ttl   = 255;
        ip->ip_p     = 0x01;            /* ICMP */
        ip->ip_sum   = 0;
@@ -1399,7 +1399,7 @@ NetReceive(volatile uchar * inpkt, int len)
                if ((ip->ip_hl_v & 0xf0) != 0x40) {
                        return;
                }
-               if (ip->ip_off & htons(0x1fff)) { /* Can't deal w/ fragments */
+               if (ip->ip_off & htons(IP_OFFS)) { /* Can't deal w/ fragments */
                        return;
                }
                /* can't deal with headers > 20 bytes */
@@ -1698,7 +1698,7 @@ NetSetIP(volatile uchar * xip, IPaddr_t dest, int dport, 
int sport, int len)
        ip->ip_tos   = 0;
        ip->ip_len   = htons(IP_HDR_SIZE + len);
        ip->ip_id    = htons(NetIPID++);
-       ip->ip_off   = htons(0x4000);   /* No fragmentation */
+       ip->ip_off   = htons(IP_FLAGS_DFRAG);   /* Don't fragment */
        ip->ip_ttl   = 255;
        ip->ip_p     = 17;              /* UDP */
        ip->ip_sum   = 0;
-- 
1.6.0.2.GIT

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