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#ifndef _GPXE_IP_H
#define _GPXE_IP_H
/** @file
*
* IP protocol
*
*/
FILE_LICENCE ( GPL2_OR_LATER );
#include <stdint.h>
#include <gpxe/in.h>
#include <gpxe/list.h>
#include <gpxe/retry.h>
struct io_buffer;
struct net_device;
struct net_protocol;
/* IP constants */
#define IP_VER 0x40U
#define IP_MASK_VER 0xf0U
#define IP_MASK_HLEN 0x0fU
#define IP_MASK_OFFSET 0x1fffU
#define IP_MASK_DONOTFRAG 0x4000U
#define IP_MASK_MOREFRAGS 0x2000U
#define IP_PSHLEN 12
/* IP header defaults */
#define IP_TOS 0
#define IP_TTL 64
#define IP_FRAG_IOB_SIZE 1500
#define IP_FRAG_TIMEOUT 50
/** An IPv4 packet header */
struct iphdr {
uint8_t verhdrlen;
uint8_t service;
uint16_t len;
uint16_t ident;
uint16_t frags;
uint8_t ttl;
uint8_t protocol;
uint16_t chksum;
struct in_addr src;
struct in_addr dest;
} __attribute__ (( packed ));
/** An IPv4 pseudo header */
struct ipv4_pseudo_header {
struct in_addr src;
struct in_addr dest;
uint8_t zero_padding;
uint8_t protocol;
uint16_t len;
};
/** An IPv4 address/routing table entry */
struct ipv4_miniroute {
/** List of miniroutes */
struct list_head list;
/** Network device */
struct net_device *netdev;
/** IPv4 address */
struct in_addr address;
/** Subnet mask */
struct in_addr netmask;
/** Gateway address */
struct in_addr gateway;
};
/* 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 I/O buffer */
struct io_buffer *frag_iob;
/* Reassembly timer */
struct retry_timer frag_timer;
/* List of fragment reassembly buffers */
struct list_head list;
};
extern struct list_head ipv4_miniroutes;
extern struct net_protocol ipv4_protocol;
#endif /* _GPXE_IP_H */
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