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/**
* Copyright (C) 2012-2014 Steven Barth <steven@midlink.org>
* Copyright (C) 2018 Hans Dedecker <dedeckeh@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License v2 as published by
* the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#ifndef _RA_H_
#define _RA_H_
#include <netinet/in.h>
#include <stdbool.h>
#include <stdint.h>
#define ALL_IPV6_NODES {{{0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01}}}
#define ALL_IPV6_ROUTERS {{{0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02}}}
struct icmpv6_opt {
uint8_t type;
uint8_t len;
uint8_t data[6];
};
/* RFC8910 Captive-Portal §2.3 */
struct icmpv6_opt_captive_portal {
uint8_t type; /* 37 */
uint8_t len; /* includes the Type and Length fields, in units of 8 bytes */
uint8_t data[]; /* padded with NUL (0x00) to make length multiple of 8 */
};
struct icmpv6_opt_route_info {
uint8_t type;
uint8_t len;
uint8_t prefix_len;
uint8_t flags;
uint32_t lifetime;
uint8_t prefix[];
};
typedef enum ra_ifid_mode {
RA_IFID_EUI64,
RA_IFID_FIXED,
RA_IFID_RANDOM,
RA_IFID_LLA,
} ra_ifid_mode_t;
#define ND_OPT_ROUTE_INFORMATION 24
#define ND_OPT_CAPTIVE_PORTAL 37
#define icmpv6_for_each_option(opt, start, end)\
for (opt = (struct icmpv6_opt*)(start);\
(void*)(opt + 1) <= (void*)(end) && opt->len > 0 &&\
(void*)(opt + opt->len) <= (void*)(end); opt += opt->len)
int ra_init(const char *ifname, const struct in6_addr *ifid,
ra_ifid_mode_t ifid_mode, unsigned int options,
unsigned int holdoff_interval);
bool ra_link_up(void);
bool ra_process(void);
#endif /* _RA_H_ */
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