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#ifndef _IPXE_IPV6_H
#define _IPXE_IPV6_H
/** @file
*
* IPv6 protocol
*
*/
FILE_LICENCE ( GPL2_OR_LATER );
#include <stdint.h>
#include <string.h>
#include <byteswap.h>
#include <ipxe/in.h>
#include <ipxe/list.h>
#include <ipxe/netdevice.h>
/** IPv6 version */
#define IPV6_VER 0x60000000UL
/** IPv6 version mask */
#define IPV6_MASK_VER 0xf0000000UL
/** IPv6 maximum hop limit */
#define IPV6_HOP_LIMIT 0xff
/** IPv6 header */
struct ipv6_header {
/** Version (4 bits), Traffic class (8 bits), Flow label (20 bits) */
uint32_t ver_tc_label;
/** Payload length, including any extension headers */
uint16_t len;
/** Next header type */
uint8_t next_header;
/** Hop limit */
uint8_t hop_limit;
/** Source address */
struct in6_addr src;
/** Destination address */
struct in6_addr dest;
} __attribute__ (( packed ));
/** IPv6 extension header common fields */
struct ipv6_extension_header_common {
/** Next header type */
uint8_t next_header;
/** Header extension length (excluding first 8 bytes) */
uint8_t len;
} __attribute__ (( packed ));
/** IPv6 type-length-value options */
struct ipv6_option {
/** Type */
uint8_t type;
/** Length */
uint8_t len;
/** Value */
uint8_t value[0];
} __attribute__ (( packed ));
/** IPv6 option types */
enum ipv6_option_type {
/** Pad1 */
IPV6_OPT_PAD1 = 0x00,
/** PadN */
IPV6_OPT_PADN = 0x01,
};
/** Test if IPv6 option can be safely ignored */
#define IPV6_CAN_IGNORE_OPT( type ) ( ( (type) & 0xc0 ) == 0x00 )
/** IPv6 option-based extension header */
struct ipv6_options_header {
/** Extension header common fields */
struct ipv6_extension_header_common common;
/** Options */
struct ipv6_option options[0];
} __attribute__ (( packed ));
/** IPv6 routing header */
struct ipv6_routing_header {
/** Extension header common fields */
struct ipv6_extension_header_common common;
/** Routing type */
uint8_t type;
/** Segments left */
uint8_t remaining;
/** Type-specific data */
uint8_t data[0];
} __attribute__ (( packed ));
/** IPv6 fragment header */
struct ipv6_fragment_header {
/** Extension header common fields */
struct ipv6_extension_header_common common;
/** Fragment offset (13 bits), reserved, more fragments (1 bit) */
uint16_t offset_more;
/** Identification */
uint32_t ident;
} __attribute__ (( packed ));
/** Fragment offset mask */
#define IPV6_MASK_OFFSET 0xfff8
/** More fragments */
#define IPV6_MASK_MOREFRAGS 0x0001
/** IPv6 extension header */
union ipv6_extension_header {
/** Extension header common fields */
struct ipv6_extension_header_common common;
/** Minimum size padding */
uint8_t pad[8];
/** Generic options header */
struct ipv6_options_header options;
/** Hop-by-hop options header */
struct ipv6_options_header hopbyhop;
/** Routing header */
struct ipv6_routing_header routing;
/** Fragment header */
struct ipv6_fragment_header fragment;
/** Destination options header */
struct ipv6_options_header destination;
};
/** IPv6 header types */
enum ipv6_header_type {
/** IPv6 hop-by-hop options header type */
IPV6_HOPBYHOP = 0,
/** IPv6 routing header type */
IPV6_ROUTING = 43,
/** IPv6 fragment header type */
IPV6_FRAGMENT = 44,
/** IPv6 no next header type */
IPV6_NO_HEADER = 59,
/** IPv6 destination options header type */
IPV6_DESTINATION = 60,
};
/** IPv6 pseudo-header */
struct ipv6_pseudo_header {
/** Source address */
struct in6_addr src;
/** Destination address */
struct in6_addr dest;
/** Upper-layer packet length */
uint32_t len;
/** Zero padding */
uint8_t zero[3];
/** Next header */
uint8_t next_header;
} __attribute__ (( packed ));
/** An IPv6 address/routing table entry */
struct ipv6_miniroute {
/** List of miniroutes */
struct list_head list;
/** Network device */
struct net_device *netdev;
/** IPv6 address (or prefix if no address is defined) */
struct in6_addr address;
/** Prefix length */
unsigned int prefix_len;
/** IPv6 prefix mask (derived from prefix length) */
struct in6_addr prefix_mask;
/** Router address */
struct in6_addr router;
/** Flags */
unsigned int flags;
};
/** IPv6 address/routing table entry flags */
enum ipv6_miniroute_flags {
/** Routing table entry address is valid */
IPV6_HAS_ADDRESS = 0x0001,
/** Routing table entry router address is valid */
IPV6_HAS_ROUTER = 0x0002,
};
/**
* Construct local IPv6 address via EUI-64
*
* @v addr Prefix to be completed
* @v netdev Network device
* @ret prefix_len Prefix length, or negative error
*/
static inline int ipv6_eui64 ( struct in6_addr *addr,
struct net_device *netdev ) {
struct ll_protocol *ll_protocol = netdev->ll_protocol;
const void *ll_addr = netdev->ll_addr;
int rc;
if ( ( rc = ll_protocol->eui64 ( ll_addr, &addr->s6_addr[8] ) ) != 0 )
return rc;
addr->s6_addr[8] ^= 0x02;
return 64;
}
/**
* Construct link-local address via EUI-64
*
* @v addr Zeroed address to construct
* @v netdev Network device
* @ret prefix_len Prefix length, or negative error
*/
static inline int ipv6_link_local ( struct in6_addr *addr,
struct net_device *netdev ) {
addr->s6_addr16[0] = htons ( 0xfe80 );
return ipv6_eui64 ( addr, netdev );
}
/**
* Construct solicited-node multicast address
*
* @v addr Zeroed address to construct
* @v unicast Unicast address
*/
static inline void ipv6_solicited_node ( struct in6_addr *addr,
const struct in6_addr *unicast ) {
addr->s6_addr16[0] = htons ( 0xff02 );
addr->s6_addr[11] = 1;
addr->s6_addr[12] = 0xff;
memcpy ( &addr->s6_addr[13], &unicast->s6_addr[13], 3 );
}
/**
* Construct all-routers multicast address
*
* @v addr Zeroed address to construct
*/
static inline void ipv6_all_routers ( struct in6_addr *addr ) {
addr->s6_addr16[0] = htons ( 0xff02 );
addr->s6_addr[15] = 2;
}
extern struct list_head ipv6_miniroutes;
extern struct net_protocol ipv6_protocol __net_protocol;
extern int ipv6_has_addr ( struct net_device *netdev, struct in6_addr *addr );
extern int ipv6_set_prefix ( struct net_device *netdev, struct in6_addr *prefix,
unsigned int prefix_len, struct in6_addr *router );
extern int ipv6_set_address ( struct net_device *netdev,
struct in6_addr *address );
extern int parse_ipv6_setting ( const struct setting_type *type,
const char *value, void *buf, size_t len );
extern int format_ipv6_setting ( const struct setting_type *type,
const void *raw, size_t raw_len, char *buf,
size_t len );
#endif /* _IPXE_IPV6_H */
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