IP protocol. More...

#include <stdint.h>
#include <ipxe/in.h>
#include <ipxe/list.h>
#include <ipxe/retry.h>
#include <ipxe/netdevice.h>

Data Structures
struct	iphdr
	An IPv4 packet header. More...

struct	ipv4_pseudo_header
	An IPv4 pseudo header. More...

struct	ipv4_miniroute
	An IPv4 address/routing table entry. More...

Macros
#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

#define	IP_TOS 0

#define	IP_TTL 64

Functions
	FILE_LICENCE (GPL2_OR_LATER_OR_UBDL)

struct ipv4_miniroute *	ipv4_route (unsigned int scope_id, struct in_addr *dest)
	Perform IPv4 routing. More...

int	ipv4_has_any_addr (struct net_device *netdev)
	Check if network device has any IPv4 address. More...

int	parse_ipv4_setting (const struct setting_type type, const char value, void *buf, size_t len)

int	format_ipv4_setting (const struct setting_type type, const void raw, size_t raw_len, char *buf, size_t len)

Variables
struct list_head	ipv4_miniroutes
	List of IPv4 miniroutes. More...

struct net_protocol ipv4_protocol	__net_protocol
	AoE protocol. More...

Detailed Description

IP protocol.

Definition in file ip.h.

Macro Definition Documentation

◆ IP_VER

#define IP_VER 0x40U

Definition at line 22 of file ip.h.

◆ IP_MASK_VER

#define IP_MASK_VER 0xf0U

Definition at line 23 of file ip.h.

◆ IP_MASK_HLEN

#define IP_MASK_HLEN 0x0fU

Definition at line 24 of file ip.h.

◆ IP_MASK_OFFSET

#define IP_MASK_OFFSET 0x1fffU

Definition at line 25 of file ip.h.

◆ IP_MASK_DONOTFRAG

#define IP_MASK_DONOTFRAG 0x4000U

Definition at line 26 of file ip.h.

◆ IP_MASK_MOREFRAGS

#define IP_MASK_MOREFRAGS 0x2000U

Definition at line 27 of file ip.h.

◆ IP_PSHLEN

#define IP_PSHLEN 12

Definition at line 28 of file ip.h.

◆ IP_TOS

#define IP_TOS 0

Definition at line 31 of file ip.h.

◆ IP_TTL

#define IP_TTL 64

Definition at line 32 of file ip.h.

Function Documentation

◆ FILE_LICENCE()

FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL )

◆ ipv4_route()

struct ipv4_miniroute* ipv4_route	(	unsigned int	scope_id,
		struct in_addr *	dest
	)

Perform IPv4 routing.

Parameters

scope_id	Destination address scope ID
dest	Final destination address

Return values

dest	Next hop destination address
miniroute	Routing table entry to use, or NULL if no route

If the route requires use of a gateway, the next hop destination address will be overwritten with the gateway address.

Definition at line 309 of file ipv4.c.

                                                             {
         struct ipv4_miniroute *miniroute;
 
         /* Find first usable route in routing table */
         list_for_each_entry ( miniroute, &ipv4_miniroutes, list ) {
 
                 /* Skip closed network devices */
                 if ( ! netdev_is_open ( miniroute->netdev ) )
                         continue;
 
                 if ( IN_IS_MULTICAST ( dest->s_addr ) ) {
 
                         /* If destination is non-global, and the scope
                          * ID matches this network device, then use
                          * the first matching route.
                          */
                         if ( miniroute->netdev->scope_id == scope_id )
                                 return miniroute;
 
                 } else {
 
                         /* If destination is global, then use the
                          * first matching route (via its gateway if
                          * specified).
                          */
                         if ( ( ( dest->s_addr ^ miniroute->network.s_addr )
                                & miniroute->netmask.s_addr ) == 0 ) {
                                 if ( miniroute->gateway.s_addr )
                                         *dest = miniroute->gateway;
                                 return miniroute;
                         }
                 }
         }
 
         return NULL;
 }

References dest, ipv4_miniroute::gateway, IN_IS_MULTICAST, ipv4_miniroutes, ipv4_miniroute::list, list_for_each_entry, ipv4_miniroute::netdev, netdev_is_open(), ipv4_miniroute::netmask, ipv4_miniroute::network, NULL, in_addr::s_addr, and net_device::scope_id.

Referenced by ipv4_netdev(), ipv4_route_okx(), and ipv4_tx().

◆ ipv4_has_any_addr()

int ipv4_has_any_addr ( struct net_device * netdev )

Check if network device has any IPv4 address.

Parameters

netdev Network device

Return values

has_any_addr Network device has any IPv4 address

Definition at line 588 of file ipv4.c.

                                                     {
         struct ipv4_miniroute *miniroute;
 
         list_for_each_entry ( miniroute, &ipv4_miniroutes, list ) {
                 if ( miniroute->netdev == netdev )
                         return 1;
         }
         return 0;
 }

References ipv4_miniroutes, ipv4_miniroute::list, list_for_each_entry, netdev, and ipv4_miniroute::netdev.

Referenced by dhcp_create_packet(), and ipv4_rx().

◆ parse_ipv4_setting()

int parse_ipv4_setting	(	const struct setting_type *	type,
		const char *	value,
		void *	buf,
		size_t	len
	)

◆ format_ipv4_setting()

int format_ipv4_setting	(	const struct setting_type *	type,
		const void *	raw,
		size_t	raw_len,
		char *	buf,
		size_t	len
	)

Variable Documentation

◆ ipv4_miniroutes

struct list_head ipv4_miniroutes

List of IPv4 miniroutes.

Definition at line 57 of file ipv4.c.

Referenced by ipv4_add_miniroute(), ipv4_del_miniroutes(), ipv4_has_addr(), ipv4_has_any_addr(), ipv4_route(), and route_ipv4_print().

◆ __net_protocol

struct net_protocol ipv4_protocol __net_protocol

AoE protocol.

FIP protocol.

Definition at line 55 of file aoe.c.

Data Structures

Macros

Functions

Variables