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Added fragment reassembly code

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This commit is contained in:
Nikhil Chandru Rao
2006-06-30 08:52:03 +00:00
parent eb091f03e3
commit 5f651f8622
3 changed files with 155 additions and 15 deletions
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23
src/include/gpxe/ip.h
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@@ -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;