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/*
* STATICd - static routes header
* Copyright (C) 2018 Cumulus Networks, Inc.
* Donald Sharp
*
* This program 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 of the License, or (at your option)
* any later version.
*
* 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.
*
* You should have received a copy of the GNU General Public License along
* with this program; see the file COPYING; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef __STATIC_ROUTES_H__
#define __STATIC_ROUTES_H__
#include "lib/mpls.h"
/* Static route label information */
struct static_nh_label {
uint8_t num_labels;
uint8_t reserved[3];
mpls_label_t label[MPLS_MAX_LABELS];
};
enum static_blackhole_type {
STATIC_BLACKHOLE_DROP = 0,
STATIC_BLACKHOLE_NULL,
STATIC_BLACKHOLE_REJECT
};
typedef enum {
STATIC_IFNAME,
STATIC_IPV4_GATEWAY,
STATIC_IPV4_GATEWAY_IFNAME,
STATIC_BLACKHOLE,
STATIC_IPV6_GATEWAY,
STATIC_IPV6_GATEWAY_IFNAME,
} static_types;
/*
* Route Creation gives us:
* START -> Initial State, only exit is when we send the route to
* zebra for installation
* When we send the route to Zebra move to SENT_TO_ZEBRA
* SENT_TO_ZEBRA -> A way to notice that we've sent the route to zebra
* But have not received a response on it's status yet
* After The response from zebra we move to INSTALLED or FAILED
* INSTALLED -> Route was accepted
* FAILED -> Route was rejected
* When we receive notification about a nexthop that a route uses
* We move the route back to START and initiate the process again.
*/
enum static_install_states {
STATIC_START,
STATIC_SENT_TO_ZEBRA,
STATIC_INSTALLED,
STATIC_NOT_INSTALLED,
};
/* Static route information. */
struct static_route {
/* For linked list. */
struct static_route *prev;
struct static_route *next;
/* VRF identifier. */
vrf_id_t vrf_id;
vrf_id_t nh_vrf_id;
char nh_vrfname[VRF_NAMSIZ + 1];
/*
* States that we walk the route through
* To know where we are.
*/
enum static_install_states state;
/* Administrative distance. */
uint8_t distance;
/* Tag */
route_tag_t tag;
/* Flag for this static route's type. */
static_types type;
/*
* Nexthop value.
*/
enum static_blackhole_type bh_type;
union g_addr addr;
ifindex_t ifindex;
bool nh_registered;
bool nh_valid;
char ifname[INTERFACE_NAMSIZ + 1];
/* Label information */
struct static_nh_label snh_label;
uint32_t table_id;
/*
* Whether to pretend the nexthop is directly attached to the specified
* link. Only meaningful when both a gateway address and interface name
* are specified.
*/
bool onlink;
};
extern bool mpls_enabled;
extern struct zebra_privs_t static_privs;
void static_fixup_vrf_ids(struct static_vrf *svrf);
extern int static_add_route(afi_t afi, safi_t safi, uint8_t type,
struct prefix *p, struct prefix_ipv6 *src_p,
union g_addr *gate, const char *ifname,
enum static_blackhole_type bh_type, route_tag_t tag,
uint8_t distance, struct static_vrf *svrf,
struct static_vrf *nh_svrf,
struct static_nh_label *snh_label,
uint32_t table_id, bool onlink);
extern int static_delete_route(afi_t afi, safi_t safi, uint8_t type,
struct prefix *p, struct prefix_ipv6 *src_p,
union g_addr *gate, const char *ifname,
route_tag_t tag, uint8_t distance,
struct static_vrf *svrf,
struct static_nh_label *snh_label,
uint32_t table_id);
extern void static_cleanup_vrf_ids(struct static_vrf *disable_svrf);
extern void static_install_intf_nh(struct interface *ifp);
extern void static_ifindex_update(struct interface *ifp, bool up);
#endif
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