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ripd.h
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// SPDX-License-Identifier: GPL-2.0-or-later
/* RIP related values and structures.
* Copyright (C) 1997, 1998, 1999 Kunihiro Ishiguro <[email protected]>
*/
#ifndef _ZEBRA_RIP_H
#define _ZEBRA_RIP_H
#include "hook.h"
#include "nexthop.h"
#include "distribute.h"
#include "memory.h"
#include "bfd.h"
/* RIP version number. */
#define RIPv1 1
#define RIPv2 2
/* N.B. stuff will break if
(RIPv1 != RI_RIP_VERSION_1) || (RIPv2 != RI_RIP_VERSION_2) */
/* RIP command list. */
#define RIP_REQUEST 1
#define RIP_RESPONSE 2
#define RIP_TRACEON 3 /* Obsolete */
#define RIP_TRACEOFF 4 /* Obsolete */
#define RIP_POLL 5
#define RIP_POLL_ENTRY 6
#define RIP_COMMAND_MAX 7
/* RIP metric infinity value.*/
#define RIP_METRIC_INFINITY 16
/* Normal RIP packet min and max size. */
#define RIP_PACKET_MINSIZ 4
#define RIP_PACKET_MAXSIZ 512
#define RIP_HEADER_SIZE 4
#define RIP_RTE_SIZE 20
/* Max count of routing table entry in one rip packet. */
#define RIP_MAX_RTE ((RIP_PACKET_MAXSIZ - RIP_HEADER_SIZE) / RIP_RTE_SIZE)
/* RIP version 2 multicast address. */
#ifndef INADDR_RIP_GROUP
#define INADDR_RIP_GROUP 0xe0000009 /* 224.0.0.9 */
#endif
/* RIP peer timeout value. */
#define RIP_PEER_TIMER_DEFAULT 180
/* RIP port number. */
#define RIP_PORT_DEFAULT 520
/* Default configuration file name. */
#define RIPD_DEFAULT_CONFIG "ripd.conf"
/* RIP route types. */
#define RIP_ROUTE_RTE 0
#define RIP_ROUTE_STATIC 1
#define RIP_ROUTE_DEFAULT 2
#define RIP_ROUTE_REDISTRIBUTE 3
#define RIP_ROUTE_INTERFACE 4
/* RIPv2 special RTE family types */
#define RIP_FAMILY_AUTH 0xffff
/* RIPv2 authentication types, for RIP_FAMILY_AUTH RTE's */
#define RIP_NO_AUTH 0
#define RIP_AUTH_DATA 1
#define RIP_AUTH_SIMPLE_PASSWORD 2
#define RIP_AUTH_MD5 3
/* RIPv2 Simple authentication */
#define RIP_AUTH_SIMPLE_SIZE 16
/* RIPv2 MD5 authentication. */
#define RIP_AUTH_MD5_SIZE 16
#define RIP_AUTH_MD5_COMPAT_SIZE RIP_RTE_SIZE
/* YANG paths */
#define RIP_INSTANCE "/frr-ripd:ripd/instance"
#define RIP_IFACE "/frr-interface:lib/interface/frr-ripd:rip"
DECLARE_MGROUP(RIPD);
/* RIP structure. */
struct rip {
RB_ENTRY(rip) entry;
/* VRF this routing instance is associated with. */
char *vrf_name;
/* VRF backpointer (might be NULL if the VRF doesn't exist). */
struct vrf *vrf;
/* Status of the routing instance. */
bool enabled;
/* RIP socket. */
int sock;
/* Default version of rip instance. */
int version_send; /* version 1 or 2 (but not both) */
int version_recv; /* version 1 or 2 or both */
/* Output buffer of RIP. */
struct stream *obuf;
/* RIP routing information base. */
struct route_table *table;
/* RIP static neighbors. */
struct route_table *neighbor;
/* Linked list of RIP peers. */
struct list *peer_list;
/* RIP threads. */
struct event *t_read;
/* Update and garbage timer. */
struct event *t_update;
/* Triggered update hack. */
int trigger;
struct event *t_triggered_update;
struct event *t_triggered_interval;
/* RIP timer values. */
uint32_t update_time;
uint32_t timeout_time;
uint32_t garbage_time;
/* RIP default metric. */
uint8_t default_metric;
/* RIP default distance. */
uint8_t distance;
struct route_table *distance_table;
/* RIP ECMP flag */
uint8_t ecmp;
/* Are we in passive-interface default mode? */
bool passive_default;
/* RIP enabled interfaces. */
vector enable_interface;
/* RIP enabled networks. */
struct route_table *enable_network;
/* Vector to store passive-interface name. */
vector passive_nondefault;
/* RIP offset-lists. */
struct list *offset_list_master;
/* RIP redistribute configuration. */
struct {
bool enabled;
struct {
char *name;
struct route_map *map;
} route_map;
bool metric_config;
uint8_t metric;
} redist[ZEBRA_ROUTE_MAX];
/* For distribute-list container */
struct distribute_ctx *distribute_ctx;
/* For if_rmap container */
struct if_rmap_ctx *if_rmap_ctx;
/* Counters for SNMP. */
struct {
/* RIP route changes. */
long route_changes;
/* RIP queries. */
long queries;
} counters;
/* Default BFD profile to use with BFD sessions. */
char *default_bfd_profile;
};
RB_HEAD(rip_instance_head, rip);
RB_PROTOTYPE(rip_instance_head, rip, entry, rip_instance_compare)
/* RIP routing table entry which belong to rip_packet. */
struct rte {
uint16_t family; /* Address family of this route. */
uint16_t tag; /* Route Tag which included in RIP2 packet. */
struct in_addr prefix; /* Prefix of rip route. */
struct in_addr mask; /* Netmask of rip route. */
struct in_addr nexthop; /* Next hop of rip route. */
uint32_t metric; /* Metric value of rip route. */
};
/* RIP packet structure. */
struct rip_packet {
unsigned char command; /* Command type of RIP packet. */
unsigned char version; /* RIP version which coming from peer. */
unsigned char pad1; /* Padding of RIP packet header. */
unsigned char pad2; /* Same as above. */
struct rte rte[1]; /* Address structure. */
};
/* Buffer to read RIP packet. */
union rip_buf {
struct rip_packet rip_packet;
char buf[RIP_PACKET_MAXSIZ];
};
/* RIP route information. */
struct rip_info {
/* This route's type. */
int type;
/* Sub type. */
int sub_type;
/* RIP nexthop. */
struct nexthop nh;
struct in_addr from;
/* Metric of this route. */
uint32_t metric;
/* External metric of this route.
if learnt from an externalm proto */
uint32_t external_metric;
/* Tag information of this route. */
uint16_t tag;
/* Flags of RIP route. */
#define RIP_RTF_FIB 1
#define RIP_RTF_CHANGED 2
uint8_t flags;
/* Garbage collect timer. */
struct event *t_timeout;
struct event *t_garbage_collect;
/* Route-map futures - this variables can be changed. */
struct in_addr nexthop_out;
uint8_t metric_set;
uint32_t metric_out;
uint16_t tag_out;
ifindex_t ifindex_out;
struct route_node *rp;
uint8_t distance;
};
typedef enum {
RIP_NO_SPLIT_HORIZON = 0,
RIP_SPLIT_HORIZON,
RIP_SPLIT_HORIZON_POISONED_REVERSE
} split_horizon_policy_t;
/* RIP specific interface configuration. */
struct rip_interface {
/* Parent routing instance. */
struct rip *rip;
/* Interface data from zebra. */
struct interface *ifp;
/* RIP is enabled on this interface. */
int enable_network;
int enable_interface;
/* RIP is running on this interface. */
int running;
/* RIP version control. */
int ri_send;
int ri_receive;
/* RIPv2 broadcast mode */
bool v2_broadcast;
/* RIPv2 authentication type. */
int auth_type;
/* RIPv2 authentication string. */
char *auth_str;
/* RIPv2 authentication key chain. */
char *key_chain;
/* value to use for md5->auth_len */
int md5_auth_len;
/* Split horizon flag. */
split_horizon_policy_t split_horizon;
/* For filter type slot. */
#define RIP_FILTER_IN 0
#define RIP_FILTER_OUT 1
#define RIP_FILTER_MAX 2
/* Access-list. */
struct access_list *list[RIP_FILTER_MAX];
/* Prefix-list. */
struct prefix_list *prefix[RIP_FILTER_MAX];
/* Route-map. */
struct route_map *routemap[RIP_FILTER_MAX];
/* Wake up thread. */
struct event *t_wakeup;
/* Interface statistics. */
int recv_badpackets;
int recv_badroutes;
int sent_updates;
/* Passive interface. */
int passive;
/* BFD information. */
struct {
bool enabled;
char *profile;
} bfd;
};
/* RIP peer information. */
struct rip_peer {
/* Parent routing instance. */
struct rip *rip;
/* Back-pointer to RIP interface. */
struct rip_interface *ri;
/* Peer address. */
struct in_addr addr;
/* Peer RIP tag value. */
int domain;
/* Last update time. */
time_t uptime;
/* Peer RIP version. */
uint8_t version;
/* Statistics. */
int recv_badpackets;
int recv_badroutes;
/* Timeout thread. */
struct event *t_timeout;
/* BFD information */
struct bfd_session_params *bfd_session;
};
struct rip_distance {
/* Distance value for the IP source prefix. */
uint8_t distance;
/* Name of the access-list to be matched. */
char *access_list;
};
struct rip_md5_info {
uint16_t family;
uint16_t type;
uint16_t packet_len;
uint8_t keyid;
uint8_t auth_len;
uint32_t sequence;
uint32_t reserv1;
uint32_t reserv2;
};
struct rip_md5_data {
uint16_t family;
uint16_t type;
uint8_t digest[16];
};
/* RIP accepet/announce methods. */
#define RI_RIP_UNSPEC 0
#define RI_RIP_VERSION_1 1
#define RI_RIP_VERSION_2 2
#define RI_RIP_VERSION_1_AND_2 3
#define RI_RIP_VERSION_NONE 4
/* N.B. stuff will break if
(RIPv1 != RI_RIP_VERSION_1) || (RIPv2 != RI_RIP_VERSION_2) */
/* RIP event. */
enum rip_event {
RIP_READ,
RIP_UPDATE_EVENT,
RIP_TRIGGERED_UPDATE,
};
/* Macro for timer turn on. */
#define RIP_TIMER_ON(T, F, V) event_add_timer(master, (F), rinfo, (V), &(T))
#define RIP_OFFSET_LIST_IN 0
#define RIP_OFFSET_LIST_OUT 1
#define RIP_OFFSET_LIST_MAX 2
struct rip_offset_list {
/* Parent routing instance. */
struct rip *rip;
char *ifname;
struct {
char *alist_name;
/* struct access_list *alist; */
uint8_t metric;
} direct[RIP_OFFSET_LIST_MAX];
};
/* Prototypes. */
extern void rip_init(void);
extern void rip_clean(struct rip *rip);
extern void rip_clean_network(struct rip *rip);
extern void rip_interfaces_clean(struct rip *rip);
extern int rip_passive_nondefault_set(struct rip *rip, const char *ifname);
extern int rip_passive_nondefault_unset(struct rip *rip, const char *ifname);
extern void rip_passive_nondefault_clean(struct rip *rip);
extern void rip_if_init(void);
extern void rip_route_map_init(void);
extern void rip_zebra_vrf_register(struct vrf *vrf);
extern void rip_zebra_vrf_deregister(struct vrf *vrf);
extern void rip_zclient_init(struct event_loop *e);
extern void rip_zclient_stop(void);
extern int if_check_address(struct rip *rip, struct in_addr addr);
extern struct rip *rip_lookup_by_vrf_id(vrf_id_t vrf_id);
extern struct rip *rip_lookup_by_vrf_name(const char *vrf_name);
extern struct rip *rip_create(const char *vrf_name, struct vrf *vrf,
int socket);
extern int rip_request_send(struct sockaddr_in *, struct interface *, uint8_t,
struct connected *);
extern int rip_neighbor_lookup(struct rip *rip, struct sockaddr_in *from);
extern int rip_neighbor_add(struct rip *rip, struct prefix_ipv4 *p);
extern int rip_neighbor_delete(struct rip *rip, struct prefix_ipv4 *p);
extern int rip_enable_network_add(struct rip *rip, struct prefix *p);
extern int rip_enable_network_delete(struct rip *rip, struct prefix *p);
extern int rip_enable_if_add(struct rip *rip, const char *ifname);
extern int rip_enable_if_delete(struct rip *rip, const char *ifname);
extern void rip_event(struct rip *rip, enum rip_event event, int sock);
extern void rip_ecmp_disable(struct rip *rip);
extern int rip_create_socket(struct vrf *vrf);
extern int rip_redistribute_check(struct rip *rip, int type);
extern void rip_redistribute_conf_update(struct rip *rip, int type);
extern void rip_redistribute_conf_delete(struct rip *rip, int type);
extern void rip_redistribute_add(struct rip *rip, int type, int sub_type,
struct prefix_ipv4 *p, struct nexthop *nh,
unsigned int metric, unsigned char distance,
route_tag_t tag);
extern void rip_redistribute_delete(struct rip *rip, int type, int sub_type,
struct prefix_ipv4 *p, ifindex_t ifindex);
extern void rip_redistribute_withdraw(struct rip *rip, int type);
extern void rip_zebra_ipv4_add(struct rip *rip, struct route_node *rp);
extern void rip_zebra_ipv4_delete(struct rip *rip, struct route_node *rp);
extern void rip_interface_multicast_set(int, struct connected *);
extern void rip_distribute_update_interface(struct interface *);
extern void rip_if_rmap_update_interface(struct interface *ifp);
extern int rip_show_network_config(struct vty *vty, struct rip *rip);
extern void rip_show_redistribute_config(struct vty *vty, struct rip *rip);
extern void rip_peer_free(struct rip_peer *peer);
extern void rip_peer_update(struct rip *rip, struct rip_interface *ri,
struct sockaddr_in *from, uint8_t version);
extern void rip_peer_bad_route(struct rip *rip, struct rip_interface *ri,
struct sockaddr_in *from);
extern void rip_peer_bad_packet(struct rip *rip, struct rip_interface *ri,
struct sockaddr_in *from);
extern void rip_peer_display(struct vty *vty, struct rip *rip);
extern struct rip_peer *rip_peer_lookup(struct rip *rip, struct in_addr *addr);
extern struct rip_peer *rip_peer_lookup_next(struct rip *rip,
struct in_addr *addr);
extern int rip_peer_list_cmp(struct rip_peer *p1, struct rip_peer *p2);
extern void rip_peer_list_del(void *arg);
void rip_peer_delete_routes(const struct rip_peer *peer);
extern void rip_info_free(struct rip_info *);
extern struct rip *rip_info_get_instance(const struct rip_info *rinfo);
extern struct rip_distance *rip_distance_new(void);
extern void rip_distance_free(struct rip_distance *rdistance);
extern uint8_t rip_distance_apply(struct rip *rip, struct rip_info *rinfo);
extern void rip_redistribute_enable(struct rip *rip);
extern void rip_redistribute_disable(struct rip *rip);
extern int rip_route_rte(struct rip_info *rinfo);
extern struct rip_info *rip_ecmp_add(struct rip *rip,
struct rip_info *rinfo_new);
extern struct rip_info *rip_ecmp_replace(struct rip *rip,
struct rip_info *rinfo_new);
extern struct rip_info *rip_ecmp_delete(struct rip *rip,
struct rip_info *rinfo);
extern struct rip_offset_list *rip_offset_list_new(struct rip *rip,
const char *ifname);
extern void offset_list_del(struct rip_offset_list *offset);
extern void offset_list_free(struct rip_offset_list *offset);
extern struct rip_offset_list *rip_offset_list_lookup(struct rip *rip,
const char *ifname);
extern int rip_offset_list_apply_in(struct prefix_ipv4 *, struct interface *,
uint32_t *);
extern int rip_offset_list_apply_out(struct prefix_ipv4 *, struct interface *,
uint32_t *);
extern int offset_list_cmp(struct rip_offset_list *o1,
struct rip_offset_list *o2);
extern void rip_vrf_init(void);
extern void rip_vrf_terminate(void);
extern struct zebra_privs_t ripd_privs;
extern struct rip_instance_head rip_instances;
/* Master thread structure. */
extern struct event_loop *master;
DECLARE_HOOK(rip_ifaddr_add, (struct connected * ifc), (ifc));
DECLARE_HOOK(rip_ifaddr_del, (struct connected * ifc), (ifc));
extern void rip_ecmp_change(struct rip *rip);
extern uint32_t zebra_ecmp_count;
#endif /* _ZEBRA_RIP_H */