[thirdparty/u-boot.git] / include / ndisc.h

/* SPDX-License-Identifier: GPL-2.0+ */
/*
 * Copyright (C) 2013 Allied Telesis Labs NZ
 * Chris Packham, <judge.packham@gmail.com>
 *
 * Copyright (C) 2022 YADRO
 * Viacheslav Mitrofanov <v.v.mitrofanov@yadro.com>
 */

#ifndef __NDISC_H__
#define __NDISC_H__

#include <ndisc.h>

/* struct nd_msg - ICMPv6 Neighbour Discovery message format */
struct nd_msg {
	struct icmp6hdr	icmph;
	struct in6_addr	target;
	__u8		opt[0];
};

/* struct rs_msg - ICMPv6 Router Solicitation message format */
struct rs_msg {
	struct icmp6hdr	icmph;
	__u8		opt[0];
};

/* struct ra_msg - ICMPv6 Router Advertisement message format */
struct ra_msg {
	struct icmp6hdr	icmph;
	__u32	reachable_time;
	__u32	retransmission_timer;
	__u8	opt[0];
};

/* struct echo_msg - ICMPv6 echo request/reply message format */
struct echo_msg {
	struct icmp6hdr	icmph;
	__u16		id;
	__u16		sequence;
};

/* Neigbour Discovery option types */
enum {
	__ND_OPT_PREFIX_INFO_END	= 0,
	ND_OPT_SOURCE_LL_ADDR		= 1,
	ND_OPT_TARGET_LL_ADDR		= 2,
	ND_OPT_PREFIX_INFO		= 3,
	ND_OPT_REDIRECT_HDR		= 4,
	ND_OPT_MTU			= 5,
	__ND_OPT_MAX
};

/* IPv6 destination address of packet waiting for ND */
extern struct in6_addr net_nd_sol_packet_ip6;
/* MAC destination address of packet waiting for ND */
extern uchar *net_nd_packet_mac;
/* pointer to packet waiting to be transmitted after ND is resolved */
extern uchar *net_nd_tx_packet;
/* size of packet waiting to be transmitted */
extern int net_nd_tx_packet_size;
/* the timer for ND resolution */
extern ulong net_nd_timer_start;
/* the number of requests we have sent so far */
extern int net_nd_try;

#ifdef CONFIG_IPV6
/**
 * ndisc_init() - Make initial steps for ND state machine.
 * Usually move variables into initial state.
 */
void ndisc_init(void);

/*
 * ip6_send_rs() - Send IPv6 Router Solicitation Message
 */
void ip6_send_rs(void);

/**
 * ndisc_receive() - Handle ND packet
 *
 * @et:		pointer to incoming packet
 * @ip6:	pointer to IPv6 header
 * @len:	incoming packet length
 * Return: 0 if handle successfully, -1 if unsupported/unknown ND packet type
 */
int ndisc_receive(struct ethernet_hdr *et, struct ip6_hdr *ip6, int len);

/**
 * ndisc_request() - Send ND request
 */
void ndisc_request(void);

/**
 * ndisc_init() - Check ND response timeout
 *
 * Return: 0 if no timeout, -1 otherwise
 */
int ndisc_timeout_check(void);
bool validate_ra(struct ip6_hdr *ip6);
int process_ra(struct ip6_hdr *ip6, int len);
#else
static inline void ndisc_init(void)
{
}

static inline int
ndisc_receive(struct ethernet_hdr *et, struct ip6_hdr *ip6, int len)
{
	return -1;
}

static inline void ndisc_request(void)
{
}

static inline int ndisc_timeout_check(void)
{
	return 0;
}

static inline void ip6_send_rs(void)
{
}

static inline bool validate_ra(struct ip6_hdr *ip6)
{
	return true;
}

static inline int process_ra(struct ip6_hdr *ip6, int len)
{
	return 0;
}
#endif

#endif /* __NDISC_H__ */
Commit	Line	Data
c6610e1d VM	1	/* SPDX-License-Identifier: GPL-2.0+ */
	2	/*
	3	* Copyright (C) 2013 Allied Telesis Labs NZ
	4	* Chris Packham, <judge.packham@gmail.com>
	5	*
	6	* Copyright (C) 2022 YADRO
	7	* Viacheslav Mitrofanov <v.v.mitrofanov@yadro.com>
	8	*/
	9
	10	#ifndef __NDISC_H__
	11	#define __NDISC_H__
	12
	13	#include <ndisc.h>
	14
	15	/* struct nd_msg - ICMPv6 Neighbour Discovery message format */
	16	struct nd_msg {
	17	struct icmp6hdr icmph;
	18	struct in6_addr target;
	19	__u8 opt[0];
	20	};
	21
6de98b60 EM	22	/* struct rs_msg - ICMPv6 Router Solicitation message format */
	23	struct rs_msg {
	24	struct icmp6hdr icmph;
	25	__u8 opt[0];
	26	};
	27
	28	/* struct ra_msg - ICMPv6 Router Advertisement message format */
	29	struct ra_msg {
	30	struct icmp6hdr icmph;
	31	__u32 reachable_time;
	32	__u32 retransmission_timer;
	33	__u8 opt[0];
	34	};
	35
c6610e1d VM	36	/* struct echo_msg - ICMPv6 echo request/reply message format */
	37	struct echo_msg {
	38	struct icmp6hdr icmph;
	39	__u16 id;
	40	__u16 sequence;
	41	};
	42
	43	/* Neigbour Discovery option types */
	44	enum {
	45	__ND_OPT_PREFIX_INFO_END = 0,
	46	ND_OPT_SOURCE_LL_ADDR = 1,
	47	ND_OPT_TARGET_LL_ADDR = 2,
	48	ND_OPT_PREFIX_INFO = 3,
	49	ND_OPT_REDIRECT_HDR = 4,
	50	ND_OPT_MTU = 5,
	51	__ND_OPT_MAX
	52	};
	53
	54	/* IPv6 destination address of packet waiting for ND */
	55	extern struct in6_addr net_nd_sol_packet_ip6;
	56	/* MAC destination address of packet waiting for ND */
	57	extern uchar *net_nd_packet_mac;
	58	/* pointer to packet waiting to be transmitted after ND is resolved */
	59	extern uchar *net_nd_tx_packet;
	60	/* size of packet waiting to be transmitted */
	61	extern int net_nd_tx_packet_size;
	62	/* the timer for ND resolution */
	63	extern ulong net_nd_timer_start;
	64	/* the number of requests we have sent so far */
	65	extern int net_nd_try;
	66
	67	#ifdef CONFIG_IPV6
	68	/**
	69	* ndisc_init() - Make initial steps for ND state machine.
	70	* Usually move variables into initial state.
	71	*/
	72	void ndisc_init(void);
	73
6de98b60 EM	74	/*
	75	* ip6_send_rs() - Send IPv6 Router Solicitation Message
	76	*/
	77	void ip6_send_rs(void);
	78
c6610e1d VM	79	/**
	80	* ndisc_receive() - Handle ND packet
	81	*
	82	* @et: pointer to incoming packet
	83	* @ip6: pointer to IPv6 header
	84	* @len: incoming packet length
	85	* Return: 0 if handle successfully, -1 if unsupported/unknown ND packet type
	86	*/
	87	int ndisc_receive(struct ethernet_hdr et, struct ip6_hdr ip6, int len);
	88
	89	/**
	90	* ndisc_request() - Send ND request
	91	*/
	92	void ndisc_request(void);
	93
	94	/**
	95	* ndisc_init() - Check ND response timeout
	96	*
	97	* Return: 0 if no timeout, -1 otherwise
	98	*/
	99	int ndisc_timeout_check(void);
6de98b60 EM	100	bool validate_ra(struct ip6_hdr *ip6);
6de98b60 EM	101	int process_ra(struct ip6_hdr *ip6, int len);
c6610e1d VM	102	#else
	103	static inline void ndisc_init(void)
	104	{
	105	}
	106
	107	static inline int
	108	ndisc_receive(struct ethernet_hdr et, struct ip6_hdr ip6, int len)
	109	{
	110	return -1;
	111	}
	112
	113	static inline void ndisc_request(void)
	114	{
	115	}
	116
	117	static inline int ndisc_timeout_check(void)
	118	{
	119	return 0;
	120	}
6de98b60 EM	121
	122	static inline void ip6_send_rs(void)
	123	{
	124	}
	125
	126	static inline bool validate_ra(struct ip6_hdr *ip6)
	127	{
	128	return true;
	129	}
	130
	131	static inline int process_ra(struct ip6_hdr *ip6, int len)
	132	{
	133	return 0;
	134	}
c6610e1d VM	135	#endif
	136
	137	#endif /* __NDISC_H__ */