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/*
* Nexthop structure definition.
* Copyright (C) 1997, 98, 99, 2001 Kunihiro Ishiguro
* Copyright (C) 2013 Cumulus Networks, Inc.
*
* This file is part of Quagga.
*
* Quagga is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2, or (at your option) any
* later version.
*
* Quagga 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.
*
* You should have received a copy of the GNU General Public License
* along with Quagga; see the file COPYING. If not, write to the Free
* Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*/
#ifndef _LIB_NEXTHOP_H
#define _LIB_NEXTHOP_H
#include "prefix.h"
union g_addr {
struct in_addr ipv4;
#ifdef HAVE_IPV6
struct in6_addr ipv6;
#endif /* HAVE_IPV6 */
};
enum nexthop_types_t
{
NEXTHOP_TYPE_IFINDEX = 1, /* Directly connected. */
NEXTHOP_TYPE_IFNAME, /* Interface route. */
NEXTHOP_TYPE_IPV4, /* IPv4 nexthop. */
NEXTHOP_TYPE_IPV4_IFINDEX, /* IPv4 nexthop with ifindex. */
NEXTHOP_TYPE_IPV4_IFNAME, /* IPv4 nexthop with ifname. */
NEXTHOP_TYPE_IPV6, /* IPv6 nexthop. */
NEXTHOP_TYPE_IPV6_IFINDEX, /* IPv6 nexthop with ifindex. */
NEXTHOP_TYPE_IPV6_IFNAME, /* IPv6 nexthop with ifname. */
NEXTHOP_TYPE_BLACKHOLE, /* Null0 nexthop. */
};
/* Nexthop structure. */
struct nexthop
{
struct nexthop *next;
struct nexthop *prev;
/* Interface index. */
char *ifname;
ifindex_t ifindex;
enum nexthop_types_t type;
u_char flags;
#define NEXTHOP_FLAG_ACTIVE (1 << 0) /* This nexthop is alive. */
#define NEXTHOP_FLAG_FIB (1 << 1) /* FIB nexthop. */
#define NEXTHOP_FLAG_RECURSIVE (1 << 2) /* Recursive nexthop. */
#define NEXTHOP_FLAG_ONLINK (1 << 3) /* Nexthop should be installed onlink. */
#define NEXTHOP_FLAG_MATCHED (1 << 4) /* Already matched vs a nexthop */
#define NEXTHOP_FLAG_FILTERED (1 << 5) /* rmap filtered, used by static only */
/* Nexthop address */
union g_addr gate;
union g_addr src;
union g_addr rmap_src; /* Src is set via routemap */
/* Nexthops obtained by recursive resolution.
*
* If the nexthop struct needs to be resolved recursively,
* NEXTHOP_FLAG_RECURSIVE will be set in flags and the nexthops
* obtained by recursive resolution will be added to `resolved'.
* Only one level of recursive resolution is currently supported. */
struct nexthop *resolved;
};
struct nexthop *nexthop_new (void);
void nexthop_add (struct nexthop **target, struct nexthop *nexthop);
void copy_nexthops (struct nexthop **tnh, struct nexthop *nh);
void nexthop_free (struct nexthop *nexthop);
void nexthops_free (struct nexthop *nexthop);
extern const char *nexthop_type_to_str (enum nexthop_types_t nh_type);
extern int nexthop_same_no_recurse (struct nexthop *next1, struct nexthop *next2);
#endif /*_LIB_NEXTHOP_H */
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