mirror of
https://github.com/u-boot/u-boot.git
synced 2024-11-25 21:24:21 +08:00
6de98b60ba
In IPv6, the default gateway and prefix length are determined by receiving a router advertisement as defined in - https://www.rfc-editor.org/rfc/rfc4861. Add support for sending router solicitation (RS) and processing router advertisements (RA). If the RA has prefix info option and following conditions are met, then gatewayip6 and net_prefix_length of ip6addr env variables are initialized. These are later consumed by IPv6 code for non-local destination IP. - "Router Lifetime" != 0 - Prefix is NOT link-local prefix (0xfe80::/10) - L flag is 1 - "Valid Lifetime" != 0 Timing Parameters: - MAX_RTR_SOLICITATION_DELAY (0-1s) - RTR_SOLICITATION_INTERVAL (4s) (min retransmit delay) - MAX_RTR_SOLICITATIONS (3 RS transmissions) The functionality is enabled by CONFIG_IPV6_ROUTER_DISCOVERY and invoked automatically from net_init_loop(). Signed-off-by: Ehsan Mohandesi <emohandesi@linux.microsoft.com> Tested-by: Viacheslav Mitrofanov <v.v.mitrofanov@yadro.com>Reviewed-by: Tested-by: Viacheslav Mitrofanov <v.v.mitrofanov@yadro.com> Reviewed-by: Viacheslav Mitrofanov <v.v.mitrofanov@yadro.com> Tested-by: Sergei Antonov <saproj@gmail.com> Reviewed-by: Sergei Antonov <saproj@gmail.com>
138 lines
2.8 KiB
C
138 lines
2.8 KiB
C
/* 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__ */
|