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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"
#include "table.h"
#include "memory.h"
DECLARE_MGROUP(STATIC);
/* 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
};
/*
* The order for below macros should be in sync with
* yang model typedef nexthop-type
*/
typedef enum {
STATIC_IFNAME = 1,
STATIC_IPV4_GATEWAY,
STATIC_IPV4_GATEWAY_IFNAME,
STATIC_IPV6_GATEWAY,
STATIC_IPV6_GATEWAY_IFNAME,
STATIC_BLACKHOLE,
} 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,
};
PREDECL_DLIST(static_path_list);
PREDECL_DLIST(static_nexthop_list);
/* Static route information */
struct static_route_info {
/* path list */
struct static_path_list_head path_list;
};
/* Static path information */
struct static_path {
/* Linkage for static path lists */
struct static_path_list_item list;
/* Administrative distance. */
uint8_t distance;
/* Tag */
route_tag_t tag;
/* Table-id */
uint32_t table_id;
/* Nexthop list */
struct static_nexthop_list_head nexthop_list;
};
DECLARE_DLIST(static_path_list, struct static_path, list);
/* Static route information. */
struct static_nexthop {
/* For linked list. */
struct static_nexthop_list_item list;
/* VRF identifier. */
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;
/* 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;
/*
* 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;
/* SR-TE color */
uint32_t color;
};
DECLARE_DLIST(static_nexthop_list, struct static_nexthop, list);
/*
* rib_dest_from_rnode
*/
static inline struct static_route_info *
static_route_info_from_rnode(struct route_node *rn)
{
return (struct static_route_info *)(rn->info);
}
extern bool mpls_enabled;
extern struct zebra_privs_t static_privs;
void static_fixup_vrf_ids(struct static_vrf *svrf);
extern struct static_nexthop *
static_add_nexthop(struct route_node *rn, struct static_path *pn, safi_t safi,
struct static_vrf *svrf, static_types type,
struct ipaddr *ipaddr, const char *ifname,
const char *nh_vrf, uint32_t color);
extern void static_install_nexthop(struct route_node *rn,
struct static_path *pn,
struct static_nexthop *nh, safi_t safi,
struct static_vrf *svrf, const char *ifname,
static_types type, const char *nh_vrf);
extern int static_delete_nexthop(struct route_node *rn, struct static_path *pn,
safi_t safi, struct static_vrf *svrf,
struct static_nexthop *nh);
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);
extern void static_install_path(struct route_node *rn, struct static_path *pn,
safi_t safi, struct static_vrf *svrf);
extern struct route_node *static_add_route(afi_t afi, safi_t safi,
struct prefix *p,
struct prefix_ipv6 *src_p,
struct static_vrf *svrf);
extern void static_del_route(struct route_node *rn, safi_t safi,
struct static_vrf *svrf);
extern struct static_path *static_add_path(struct route_node *rn,
uint32_t table_id, uint8_t distance);
extern void static_del_path(struct route_node *rn, struct static_path *pn,
safi_t safi, struct static_vrf *svrf);
extern void static_get_nh_type(static_types stype, char *type, size_t size);
extern bool static_add_nexthop_validate(const char *nh_vrf_name,
static_types type,
struct ipaddr *ipaddr);
extern struct stable_info *static_get_stable_info(struct route_node *rn);
extern void static_route_info_init(struct static_route_info *si);
extern void zebra_stable_node_cleanup(struct route_table *table,
struct route_node *node);
/*
* Max string return via API static_get_nh_str in size_t
*/
#define NEXTHOP_STR (INET6_ADDRSTRLEN + INTERFACE_NAMSIZ + 25)
/*
* For the given nexthop, returns the string
* nexthop : returns the formatted string in nexthop
* size : max size of formatted string
*/
extern void static_get_nh_str(struct static_nexthop *nh, char *nexthop,
size_t size);
#endif
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