From 5f651f862232a63ca44833041deb381f305febc6 Mon Sep 17 00:00:00 2001
From: Nikhil Chandru Rao
Date: Fri, 30 Jun 2006 08:52:03 +0000
Subject: Added fragment reassembly code

---
 src/include/gpxe/ip.h | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

(limited to 'src/include')

diff --git a/src/include/gpxe/ip.h b/src/include/gpxe/ip.h
index a6c590643..4f0f42f85 100644
--- a/src/include/gpxe/ip.h
+++ b/src/include/gpxe/ip.h
@@ -8,18 +8,25 @@
  */
 
 #include <ip.h>
+#include <gpxe/retry.h>
 
 /* IP constants */
 
 #define IP_VER		4
 #define IP_MASK_VER	0xf0
 #define IP_MASK_HLEN 	0x0f
+#define IP_MASK_OFFSET	0x1fff
+#define IP_MASK_DONOTFRAG	0x4000
+#define IP_MASK_MOREFRAGS	0x2000
 #define IP_PSHLEN 	12
 
 /* IP header defaults */
 #define IP_TOS		0
 #define IP_TTL		64
 
+#define IP_FRAG_PKB_SIZE	1500
+#define IP_FRAG_TIMEOUT		50
+
 /* IP4 pseudo header */
 struct ipv4_pseudo_header {
 	struct in_addr src;
@@ -29,6 +36,22 @@ struct ipv4_pseudo_header {
 	uint16_t len;
 };
 
+/* Fragment reassembly buffer */
+struct frag_buffer {
+	/* Identification number */
+	uint16_t ident;
+	/* Source network address */
+	struct in_addr src;
+	/* Destination network address */
+	struct in_addr dest;
+	/* Reassembled packet buffer */
+	struct pk_buff *frag_pkb;
+	/* Reassembly timer */
+	struct retry_timer frag_timer;
+	/* List of fragment reassembly buffers */
+	struct list_head list;
+};
+
 struct pk_buff;
 struct net_device;
 struct net_protocol;
-- 
cgit v1.2.3-55-g7522