/*
* dhcpcd - DHCP client daemon
* Copyright (c) 2006-2013 Roy Marples <roy@marples.name>
* All rights reserved
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef IPV6_H
#define IPV6_H
#include <sys/queue.h>
#include <netinet/in.h>
#ifdef __rtems__
#include <rtems/bsd/local/opt_inet6.h>
#endif /* __rtems__ */
#define ALLROUTERS "ff02::2"
#define HOPLIMIT 255
#define ROUNDUP8(a) (1 + (((a) - 1) | 7))
#ifndef ND6_INFINITE_LIFETIME
# define ND6_INFINITE_LIFETIME ((uint32_t)~0)
#endif
/*
* BSD kernels don't inform userland of DAD results.
* Also, for RTM_NEWADDR messages the address flags could be
* undefined leading to false positive duplicate address errors.
* As such we listen for duplicate addresses on the wire and
* wait the maxium possible length of time as dictated by the DAD transmission
* counter and RFC timings.
* See the discussion here:
* http://mail-index.netbsd.org/tech-net/2013/03/15/msg004019.html
*/
#ifndef __linux__
/* We guard here to avoid breaking a compile on linux ppc-64 headers */
# include <sys/param.h>
#endif
#ifdef BSD
# define LISTEN_DAD
#endif
/* This was fixed in NetBSD */
#ifdef __NetBSD_Prereq__
# if __NetBSD_Prereq__(6, 99, 20)
# undef LISTEN_DAD
# endif
#endif
struct ipv6_addr {
TAILQ_ENTRY(ipv6_addr) next;
struct interface *iface;
struct in6_addr prefix;
int prefix_len;
uint32_t prefix_vltime;
uint32_t prefix_pltime;
struct in6_addr addr;
short flags;
char saddr[INET6_ADDRSTRLEN];
uint8_t iaid[4];
struct interface *delegating_iface;
void (*dadcallback)(void *);
uint8_t *ns;
size_t nslen;
int nsprobes;
};
TAILQ_HEAD(ipv6_addrhead, ipv6_addr);
#define IPV6_AF_ONLINK 0x0001
#define IPV6_AF_NEW 0x0002
#define IPV6_AF_STALE 0x0004
#define IPV6_AF_ADDED 0x0008
#define IPV6_AF_AUTOCONF 0x0010
#define IPV6_AF_DUPLICATED 0x0020
#define IPV6_AF_DADCOMPLETED 0x0040
#define IPV6_AF_DELEGATED 0x0080
struct rt6 {
TAILQ_ENTRY(rt6) next;
struct in6_addr dest;
struct in6_addr net;
struct in6_addr gate;
const struct interface *iface;
int metric;
unsigned int mtu;
};
TAILQ_HEAD(rt6head, rt6);
struct ipv6_addr_l {
TAILQ_ENTRY(ipv6_addr_l) next;
struct in6_addr addr;
};
TAILQ_HEAD(ipv6_addr_l_head, ipv6_addr_l);
struct ll_callback {
TAILQ_ENTRY(ll_callback) next;
void (*callback)(void *);
void *arg;
};
TAILQ_HEAD(ll_callback_head, ll_callback);
struct ipv6_state {
struct ipv6_addr_l_head addrs;
struct ll_callback_head ll_callbacks;
};
#define IPV6_STATE(ifp) \
((struct ipv6_state *)(ifp)->if_data[IF_DATA_IPV6])
#define IPV6_CSTATE(ifp) \
((const struct ipv6_state *)(ifp)->if_data[IF_DATA_IPV6])
#ifdef INET6
int ipv6_init(void);
ssize_t ipv6_printaddr(char *, ssize_t, const uint8_t *, const char *);
int ipv6_makeaddr(struct in6_addr *, const struct interface *,
const struct in6_addr *, int);
int ipv6_makeprefix(struct in6_addr *, const struct in6_addr *, int);
int ipv6_mask(struct in6_addr *, int);
int ipv6_prefixlen(const struct in6_addr *);
int ipv6_userprefix( const struct in6_addr *, short prefix_len,
uint64_t user_number, struct in6_addr *result, short result_len);
int ipv6_addaddr(struct ipv6_addr *);
void ipv6_freedrop_addrs(struct ipv6_addrhead *, int,
const struct interface *);
void ipv6_handleifa(int, struct if_head *,
const char *, const struct in6_addr *, int);
int ipv6_handleifa_addrs(int, struct ipv6_addrhead *,
const struct in6_addr *, int);
const struct ipv6_addr_l *ipv6_linklocal(const struct interface *);
const struct ipv6_addr_l *ipv6_findaddr(const struct interface *,
const struct in6_addr *);
int ipv6_addlinklocalcallback(struct interface *, void (*)(void *), void *);
void ipv6_free_ll_callbacks(struct interface *);
void ipv6_free(struct interface *);
int ipv6_removesubnet(const struct interface *, struct ipv6_addr *);
void ipv6_buildroutes(void);
int if_address6(const struct ipv6_addr *, int);
#define add_address6(a) if_address6(a, 1)
#define del_address6(a) if_address6(a, -1)
int in6_addr_flags(const char *, const struct in6_addr *);
int if_route6(const struct rt6 *rt, int);
#define add_route6(rt) if_route6(rt, 1)
#define change_route6(rt) if_route6(rt, 0)
#define del_route6(rt) if_route6(rt, -1)
#define del_src_route6(rt) if_route6(rt, -2);
#else
#define ipv6_init() -1
#define ipv6_free_ll_callbacks(a)
#define ipv6_free(a)
#endif
#endif
