mirror of
https://gitlab.nic.cz/labs/bird.git
synced 2024-12-23 02:01:55 +00:00
29239ba2bb
Based on former commit from Pavel Tvrdik
974 lines
28 KiB
C
974 lines
28 KiB
C
/*
|
|
* BIRD -- OSPF
|
|
*
|
|
* (c) 1999--2005 Ondrej Filip <feela@network.cz>
|
|
* (c) 2009--2014 Ondrej Zajicek <santiago@crfreenet.org>
|
|
* (c) 2009--2014 CZ.NIC z.s.p.o.
|
|
*
|
|
* Can be freely distributed and used under the terms of the GNU GPL.
|
|
*/
|
|
|
|
#ifndef _BIRD_OSPF_H_
|
|
#define _BIRD_OSPF_H_
|
|
|
|
#include "nest/bird.h"
|
|
|
|
#include "lib/checksum.h"
|
|
#include "lib/ip.h"
|
|
#include "lib/lists.h"
|
|
#include "lib/slists.h"
|
|
#include "lib/socket.h"
|
|
#include "lib/timer.h"
|
|
#include "lib/resource.h"
|
|
#include "nest/protocol.h"
|
|
#include "nest/iface.h"
|
|
#include "nest/route.h"
|
|
#include "nest/cli.h"
|
|
#include "nest/locks.h"
|
|
#include "nest/bfd.h"
|
|
#include "conf/conf.h"
|
|
#include "lib/string.h"
|
|
|
|
|
|
#ifdef LOCAL_DEBUG
|
|
#define OSPF_FORCE_DEBUG 1
|
|
#else
|
|
#define OSPF_FORCE_DEBUG 0
|
|
#endif
|
|
|
|
|
|
#ifdef IPV6
|
|
#define OSPF_IS_V2 0
|
|
#else
|
|
#define OSPF_IS_V2 1
|
|
#endif
|
|
|
|
// FIXME: MAX_PREFIX_LENGTH
|
|
|
|
#define OSPF_TRACE(flags, msg, args...) \
|
|
do { if ((p->p.debug & flags) || OSPF_FORCE_DEBUG) \
|
|
log(L_TRACE "%s: " msg, p->p.name , ## args ); } while(0)
|
|
|
|
#define OSPF_PACKET(dumpfn, buffer, msg, args...) \
|
|
do { if ((p->p.debug & D_PACKETS) || OSPF_FORCE_DEBUG) \
|
|
{ log(L_TRACE "%s: " msg, p->p.name, ## args ); dumpfn(p, buffer); } } while(0)
|
|
|
|
#define LOG_PKT(msg, args...) \
|
|
log_rl(&p->log_pkt_tbf, L_REMOTE "%s: " msg, p->p.name, args)
|
|
|
|
#define LOG_PKT_AUTH(msg, args...) \
|
|
log_rl(&p->log_pkt_tbf, L_AUTH "%s: " msg, p->p.name, args)
|
|
|
|
#define LOG_PKT_WARN(msg, args...) \
|
|
log_rl(&p->log_pkt_tbf, L_WARN "%s: " msg, p->p.name, args)
|
|
|
|
#define LOG_LSA1(msg, args...) \
|
|
log_rl(&p->log_lsa_tbf, L_REMOTE "%s: " msg, p->p.name, args)
|
|
|
|
#define LOG_LSA2(msg, args...) \
|
|
do { if (! p->log_lsa_tbf.mark) \
|
|
log(L_REMOTE "%s: " msg, p->p.name, args); } while(0)
|
|
|
|
|
|
#define OSPF_PROTO 89
|
|
|
|
#define LSREFRESHTIME 1800 /* 30 minutes */
|
|
#define MINLSINTERVAL 5
|
|
#define MINLSARRIVAL 1
|
|
#define LSINFINITY 0xffffff
|
|
|
|
#define OSPF_DEFAULT_TICK 1
|
|
#define OSPF_DEFAULT_STUB_COST 1000
|
|
#define OSPF_DEFAULT_ECMP_LIMIT 16
|
|
#define OSPF_DEFAULT_TRANSINT 40
|
|
|
|
#define OSPF_MIN_PKT_SIZE 256
|
|
#define OSPF_MAX_PKT_SIZE 65535
|
|
|
|
#define OSPF_VLINK_ID_OFFSET 0x80000000
|
|
|
|
|
|
struct ospf_config
|
|
{
|
|
struct proto_config c;
|
|
uint tick;
|
|
u8 ospf2;
|
|
u8 rfc1583;
|
|
u8 stub_router;
|
|
u8 merge_external;
|
|
u8 instance_id;
|
|
u8 abr;
|
|
u8 asbr;
|
|
int ecmp;
|
|
list area_list; /* list of area configs (struct ospf_area_config) */
|
|
list vlink_list; /* list of configured vlinks (struct ospf_iface_patt) */
|
|
};
|
|
|
|
struct ospf_area_config
|
|
{
|
|
node n;
|
|
u32 areaid;
|
|
u32 default_cost; /* Cost of default route for stub areas
|
|
(With possible LSA_EXT3_EBIT for NSSA areas) */
|
|
u8 type; /* Area type (standard, stub, NSSA), represented
|
|
by option flags (OPT_E, OPT_N) */
|
|
u8 summary; /* Import summaries to this stub/NSSA area, valid for ABR */
|
|
u8 default_nssa; /* Generate default NSSA route for NSSA+summary area */
|
|
u8 translator; /* Translator role, for NSSA ABR */
|
|
u32 transint; /* Translator stability interval */
|
|
list patt_list; /* List of iface configs (struct ospf_iface_patt) */
|
|
list net_list; /* List of aggregate networks for that area */
|
|
list enet_list; /* List of aggregate external (NSSA) networks */
|
|
list stubnet_list; /* List of stub networks added to Router LSA */
|
|
};
|
|
|
|
struct area_net_config
|
|
{
|
|
node n;
|
|
struct prefix px;
|
|
u32 tag;
|
|
u8 hidden;
|
|
};
|
|
|
|
struct area_net
|
|
{
|
|
struct fib_node fn;
|
|
u32 metric; /* With possible LSA_EXT3_EBIT for NSSA area nets */
|
|
u32 tag;
|
|
u8 hidden;
|
|
u8 active;
|
|
};
|
|
|
|
struct ospf_stubnet_config
|
|
{
|
|
node n;
|
|
struct prefix px;
|
|
u32 cost;
|
|
u8 hidden;
|
|
u8 summary;
|
|
};
|
|
|
|
struct nbma_node
|
|
{
|
|
node n;
|
|
ip_addr ip;
|
|
byte eligible;
|
|
byte found;
|
|
};
|
|
|
|
struct ospf_iface_patt
|
|
{
|
|
struct iface_patt i;
|
|
u32 type;
|
|
u32 stub;
|
|
u32 cost;
|
|
u32 helloint;
|
|
u32 rxmtint;
|
|
u32 pollint;
|
|
u32 waitint;
|
|
u32 deadc;
|
|
u32 deadint;
|
|
u32 inftransdelay;
|
|
list nbma_list;
|
|
u32 priority;
|
|
u32 voa;
|
|
u32 vid;
|
|
int tx_tos;
|
|
int tx_priority;
|
|
u16 tx_length;
|
|
u16 rx_buffer;
|
|
|
|
#define OSPF_RXBUF_MINSIZE 256 /* Minimal allowed size */
|
|
u8 instance_id;
|
|
u8 autype; /* OSPF_AUTH_*, not really used in OSPFv3 */
|
|
u8 strictnbma;
|
|
u8 check_link;
|
|
u8 ecmp_weight;
|
|
u8 link_lsa_suppression;
|
|
u8 real_bcast; /* Not really used in OSPFv3 */
|
|
u8 ptp_netmask; /* bool + 2 for unspecified */
|
|
u8 ttl_security; /* bool + 2 for TX only */
|
|
u8 bfd;
|
|
u8 bsd_secondary;
|
|
list *passwords;
|
|
};
|
|
|
|
/* Default values for interface parameters */
|
|
#define COST_D 10
|
|
#define RXMTINT_D 5
|
|
#define INFTRANSDELAY_D 1
|
|
#define PRIORITY_D 1
|
|
#define HELLOINT_D 10
|
|
#define POLLINT_D 20
|
|
#define DEADC_D 4
|
|
#define WAIT_DMH 4
|
|
/* Value of Wait timer - not found it in RFC * - using 4*HELLO */
|
|
|
|
|
|
|
|
struct ospf_proto
|
|
{
|
|
struct proto p;
|
|
timer *disp_timer; /* OSPF proto dispatcher */
|
|
uint tick;
|
|
struct top_graph *gr; /* LSA graph */
|
|
slist lsal; /* List of all LSA's */
|
|
int calcrt; /* Routing table calculation scheduled?
|
|
0=no, 1=normal, 2=forced reload */
|
|
list iface_list; /* List of OSPF interfaces (struct ospf_iface) */
|
|
list area_list; /* List of OSPF areas (struct ospf_area) */
|
|
int areano; /* Number of area I belong to */
|
|
int padj; /* Number of neighbors in Exchange or Loading state */
|
|
struct fib rtf; /* Routing table */
|
|
byte ospf2; /* OSPF v2 or v3 */
|
|
byte rfc1583; /* RFC1583 compatibility */
|
|
byte stub_router; /* Do not forward transit traffic */
|
|
byte merge_external; /* Should i merge external routes? */
|
|
byte asbr; /* May i originate any ext/NSSA lsa? */
|
|
byte ecmp; /* Maximal number of nexthops in ECMP route, or 0 */
|
|
struct ospf_area *backbone; /* If exists */
|
|
event *flood_event; /* Event for flooding LS updates */
|
|
void *lsab; /* LSA buffer used when originating router LSAs */
|
|
int lsab_size, lsab_used;
|
|
linpool *nhpool; /* Linpool used for next hops computed in SPF */
|
|
sock *vlink_sk; /* IP socket used for vlink TX */
|
|
u32 router_id;
|
|
u32 last_vlink_id; /* Interface IDs for vlinks (starts at 0x80000000) */
|
|
struct tbf log_pkt_tbf; /* TBF for packet messages */
|
|
struct tbf log_lsa_tbf; /* TBF for LSA messages */
|
|
};
|
|
|
|
struct ospf_area
|
|
{
|
|
node n;
|
|
u32 areaid;
|
|
struct ospf_area_config *ac; /* Related area config */
|
|
struct top_hash_entry *rt; /* My own router LSA */
|
|
struct top_hash_entry *pxr_lsa; /* Originated prefix LSA */
|
|
list cand; /* List of candidates for RT calc. */
|
|
struct fib net_fib; /* Networks to advertise or not */
|
|
struct fib enet_fib; /* External networks for NSSAs */
|
|
u32 options; /* Optional features */
|
|
u8 update_rt_lsa; /* Rt lsa origination scheduled? */
|
|
u8 trcap; /* Transit capability? */
|
|
u8 marked; /* Used in OSPF reconfigure */
|
|
u8 translate; /* Translator state (TRANS_*), for NSSA ABR */
|
|
timer *translator_timer; /* For NSSA translator switch */
|
|
struct ospf_proto *po;
|
|
struct fib rtr; /* Routing tables for routers */
|
|
};
|
|
|
|
|
|
|
|
struct ospf_iface
|
|
{
|
|
node n;
|
|
struct iface *iface; /* Nest's iface (NULL for vlinks) */
|
|
struct ifa *addr; /* IP prefix associated with that OSPF iface */
|
|
struct ospf_area *oa;
|
|
struct ospf_iface_patt *cf;
|
|
char *ifname; /* Interface name (iface->name), new one for vlinks */
|
|
|
|
pool *pool;
|
|
sock *sk; /* IP socket */
|
|
list neigh_list; /* List of neighbors (struct ospf_neighbor) */
|
|
u32 cost; /* Cost of iface */
|
|
u32 waitint; /* number of sec before changing state from wait */
|
|
u32 rxmtint; /* number of seconds between LSA retransmissions */
|
|
u32 pollint; /* Poll interval */
|
|
u32 deadint; /* after "deadint" missing hellos is router dead */
|
|
u32 iface_id; /* Interface ID (iface->index or new value for vlinks) */
|
|
u32 vid; /* ID of peer of virtual link */
|
|
ip_addr vip; /* IP of peer of virtual link */
|
|
struct ospf_iface *vifa; /* OSPF iface which the vlink goes through */
|
|
struct ospf_area *voa; /* OSPF area which the vlink goes through */
|
|
u16 inftransdelay; /* The estimated number of seconds it takes to
|
|
transmit a Link State Update Packet over this
|
|
interface. LSAs contained in the update */
|
|
u16 helloint; /* number of seconds between hello sending */
|
|
list *passwords;
|
|
u32 csn; /* Last used crypt seq number */
|
|
bird_clock_t csn_use; /* Last time when packet with that CSN was sent */
|
|
ip_addr all_routers; /* Multicast (or broadcast) address for all routers */
|
|
ip_addr des_routers; /* Multicast (or NULL) address for designated routers */
|
|
ip_addr drip; /* Designated router IP */
|
|
ip_addr bdrip; /* Backup DR IP */
|
|
u32 drid; /* DR Router ID */
|
|
u32 bdrid; /* BDR Router ID */
|
|
s16 rt_pos_beg; /* Position of iface in Router-LSA, begin, inclusive */
|
|
s16 rt_pos_end; /* Position of iface in Router-LSA, end, exclusive */
|
|
s16 px_pos_beg; /* Position of iface in Rt Prefix-LSA, begin, inclusive */
|
|
s16 px_pos_end; /* Position of iface in Rt Prefix-LSA, end, exclusive */
|
|
u32 dr_iface_id; /* if drid is valid, this is iface_id of DR (for connecting network) */
|
|
u8 instance_id; /* Used to differentiate between more OSPF
|
|
instances on one interface */
|
|
u8 autype; /* Authentication type (OSPF_AUTH_*) */
|
|
u8 type; /* OSPF view of type (OSPF_IT_*) */
|
|
u8 strictnbma; /* Can I talk with unknown neighbors? */
|
|
u8 stub; /* Inactive interface */
|
|
u8 state; /* Interface state machine (OSPF_IS_*) */
|
|
timer *wait_timer; /* WAIT timer */
|
|
timer *hello_timer; /* HELLOINT timer */
|
|
timer *poll_timer; /* Poll Interval - for NBMA */
|
|
|
|
struct top_hash_entry *link_lsa; /* Originated link LSA */
|
|
struct top_hash_entry *net_lsa; /* Originated network LSA */
|
|
struct top_hash_entry *pxn_lsa; /* Originated prefix LSA */
|
|
struct top_hash_entry **flood_queue; /* LSAs queued for LSUPD */
|
|
u8 update_link_lsa;
|
|
u8 update_net_lsa;
|
|
u16 flood_queue_used; /* The current number of LSAs in flood_queue */
|
|
u16 flood_queue_size; /* The maximum number of LSAs in flood_queue */
|
|
int fadj; /* Number of fully adjacent neighbors */
|
|
list nbma_list;
|
|
u8 priority; /* A router priority for DR election */
|
|
u8 ioprob;
|
|
#define OSPF_I_OK 0 /* Everything OK */
|
|
#define OSPF_I_SK 1 /* Socket open failed */
|
|
#define OSPF_I_LL 2 /* Missing link-local address (OSPFv3) */
|
|
u8 sk_dr; /* Socket is a member of designated routers group */
|
|
u8 marked; /* Used in OSPF reconfigure, 2 for force restart */
|
|
u16 rxbuf; /* Buffer size */
|
|
u16 tx_length; /* Soft TX packet length limit, usually MTU */
|
|
u16 tx_hdrlen; /* Expected packet header length, less than tx_length */
|
|
u8 check_link; /* Whether iface link change is used */
|
|
u8 ecmp_weight; /* Weight used for ECMP */
|
|
u8 link_lsa_suppression; /* Suppression of Link-LSA origination */
|
|
u8 ptp_netmask; /* Send real netmask for P2P */
|
|
u8 check_ttl; /* Check incoming packets for TTL 255 */
|
|
u8 bfd; /* Use BFD on iface */
|
|
};
|
|
|
|
struct ospf_neighbor
|
|
{
|
|
node n;
|
|
pool *pool;
|
|
struct ospf_iface *ifa;
|
|
u8 state;
|
|
timer *inactim; /* Inactivity timer */
|
|
u8 imms; /* I, M, Master/slave received */
|
|
u8 myimms; /* I, M Master/slave */
|
|
u32 dds; /* DD Sequence number being sent */
|
|
u32 ddr; /* last Dat Des packet received */
|
|
|
|
u32 rid; /* Router ID */
|
|
ip_addr ip; /* IP of it's interface */
|
|
u8 priority; /* Priority */
|
|
u8 adj; /* built adjacency? */
|
|
u32 options; /* Options received */
|
|
|
|
/* Entries dr and bdr store IP addresses in OSPFv2 and router IDs in
|
|
OSPFv3, we use the same type to simplify handling */
|
|
u32 dr; /* Neighbor's idea of DR */
|
|
u32 bdr; /* Neighbor's idea of BDR */
|
|
u32 iface_id; /* ID of Neighbour's iface connected to common network */
|
|
|
|
/* Database summary list iterator, controls initial dbdes exchange.
|
|
* Advances in the LSA list as dbdes packets are sent.
|
|
*/
|
|
siterator dbsi; /* iterator of po->lsal */
|
|
|
|
/* Link state request list, controls initial LSA exchange.
|
|
* Entries added when received in dbdes packets, removed as sent in lsreq packets.
|
|
*/
|
|
slist lsrql; /* slist of struct top_hash_entry from n->lsrqh */
|
|
struct top_graph *lsrqh;
|
|
struct top_hash_entry *lsrqi; /* Pointer to the first unsent node in lsrql */
|
|
|
|
/* Link state retransmission list, controls LSA retransmission during flood.
|
|
* Entries added as sent in lsupd packets, removed when received in lsack packets.
|
|
* These entries hold ret_count in appropriate LSA entries.
|
|
*/
|
|
slist lsrtl; /* slist of struct top_hash_entry from n->lsrth */
|
|
struct top_graph *lsrth;
|
|
timer *dbdes_timer; /* DBDES exchange timer */
|
|
timer *lsrq_timer; /* LSA request timer */
|
|
timer *lsrt_timer; /* LSA retransmission timer */
|
|
list ackl[2];
|
|
#define ACKL_DIRECT 0
|
|
#define ACKL_DELAY 1
|
|
timer *ackd_timer; /* Delayed ack timer */
|
|
struct bfd_request *bfd_req; /* BFD request, if BFD is used */
|
|
void *ldd_buffer; /* Last database description packet */
|
|
u32 ldd_bsize; /* Buffer size for ldd_buffer */
|
|
u32 csn; /* Last received crypt seq number (for MD5) */
|
|
};
|
|
|
|
|
|
/* OSPF interface types */
|
|
#define OSPF_IT_BCAST 0
|
|
#define OSPF_IT_NBMA 1
|
|
#define OSPF_IT_PTP 2
|
|
#define OSPF_IT_PTMP 3
|
|
#define OSPF_IT_VLINK 4
|
|
#define OSPF_IT_UNDEF 5
|
|
|
|
/* OSPF interface states */
|
|
#define OSPF_IS_DOWN 0 /* Not active */
|
|
#define OSPF_IS_LOOP 1 /* Iface with no link */
|
|
#define OSPF_IS_WAITING 2 /* Waiting for Wait timer */
|
|
#define OSPF_IS_PTP 3 /* PTP operational */
|
|
#define OSPF_IS_DROTHER 4 /* I'm on BCAST or NBMA and I'm not DR */
|
|
#define OSPF_IS_BACKUP 5 /* I'm BDR */
|
|
#define OSPF_IS_DR 6 /* I'm DR */
|
|
|
|
/* Definitions for interface state machine */
|
|
#define ISM_UP 0 /* Interface Up */
|
|
#define ISM_WAITF 1 /* Wait timer fired */
|
|
#define ISM_BACKS 2 /* Backup seen */
|
|
#define ISM_NEICH 3 /* Neighbor change */
|
|
#define ISM_LOOP 4 /* Link down */
|
|
#define ISM_UNLOOP 5 /* Link up */
|
|
#define ISM_DOWN 6 /* Interface down */
|
|
|
|
/* OSPF authentication types */
|
|
#define OSPF_AUTH_NONE 0
|
|
#define OSPF_AUTH_SIMPLE 1
|
|
#define OSPF_AUTH_CRYPT 2
|
|
|
|
|
|
/* OSPF neighbor states */
|
|
#define NEIGHBOR_DOWN 0
|
|
#define NEIGHBOR_ATTEMPT 1
|
|
#define NEIGHBOR_INIT 2
|
|
#define NEIGHBOR_2WAY 3
|
|
#define NEIGHBOR_EXSTART 4
|
|
#define NEIGHBOR_EXCHANGE 5
|
|
#define NEIGHBOR_LOADING 6
|
|
#define NEIGHBOR_FULL 7
|
|
|
|
/* Definitions for neighbor state machine */
|
|
#define INM_HELLOREC 0 /* Hello Received */
|
|
#define INM_START 1 /* Neighbor start - for NBMA */
|
|
#define INM_2WAYREC 2 /* 2-Way received */
|
|
#define INM_NEGDONE 3 /* Negotiation done */
|
|
#define INM_EXDONE 4 /* Exchange done */
|
|
#define INM_BADLSREQ 5 /* Bad LS Request */
|
|
#define INM_LOADDONE 6 /* Load done */
|
|
#define INM_ADJOK 7 /* AdjOK? */
|
|
#define INM_SEQMIS 8 /* Sequence number mismatch */
|
|
#define INM_1WAYREC 9 /* 1-Way */
|
|
#define INM_KILLNBR 10 /* Kill Neighbor */
|
|
#define INM_INACTTIM 11 /* Inactivity timer */
|
|
#define INM_LLDOWN 12 /* Line down */
|
|
|
|
#define TRANS_OFF 0
|
|
#define TRANS_ON 1
|
|
#define TRANS_WAIT 2 /* Waiting before the end of translation */
|
|
|
|
|
|
/* Generic option flags */
|
|
#define OPT_V6 0x01 /* OSPFv3, LSA relevant for IPv6 routing calculation */
|
|
#define OPT_E 0x02 /* Related to AS-external LSAs */
|
|
#define OPT_MC 0x04 /* Related to MOSPF, not used and obsolete */
|
|
#define OPT_N 0x08 /* Related to NSSA */
|
|
#define OPT_P 0x08 /* OSPFv2, flags P and N share position, see NSSA RFC */
|
|
#define OPT_EA 0x10 /* OSPFv2, external attributes, not used and obsolete */
|
|
#define OPT_R 0x10 /* OSPFv3, originator is active router */
|
|
#define OPT_DC 0x20 /* Related to demand circuits, not used */
|
|
|
|
/* Router-LSA VEB flags are are stored together with links (OSPFv2) or options (OSPFv3) */
|
|
#define OPT_RT_B (0x01 << 24)
|
|
#define OPT_RT_E (0x02 << 24)
|
|
#define OPT_RT_V (0x04 << 24)
|
|
#define OPT_RT_NT (0x10 << 24)
|
|
|
|
/* Prefix flags, specific for OSPFv3 */
|
|
#define OPT_PX_NU 0x01
|
|
#define OPT_PX_LA 0x02
|
|
#define OPT_PX_P 0x08
|
|
#define OPT_PX_DN 0x10
|
|
|
|
|
|
struct ospf_packet
|
|
{
|
|
u8 version;
|
|
u8 type;
|
|
u16 length;
|
|
u32 routerid;
|
|
u32 areaid;
|
|
u16 checksum;
|
|
u8 instance_id; /* See RFC 6549 */
|
|
u8 autype; /* Undefined for OSPFv3 */
|
|
};
|
|
|
|
struct ospf_auth_crypto
|
|
{
|
|
u16 zero;
|
|
u8 keyid;
|
|
u8 len;
|
|
u32 csn;
|
|
};
|
|
|
|
union ospf_auth
|
|
{
|
|
u8 password[8];
|
|
struct ospf_auth_crypto c32;
|
|
};
|
|
|
|
/* Packet types */
|
|
#define HELLO_P 1 /* Hello */
|
|
#define DBDES_P 2 /* Database description */
|
|
#define LSREQ_P 3 /* Link state request */
|
|
#define LSUPD_P 4 /* Link state update */
|
|
#define LSACK_P 5 /* Link state acknowledgement */
|
|
|
|
|
|
#define DBDES_I 4 /* Init bit */
|
|
#define DBDES_M 2 /* More bit */
|
|
#define DBDES_MS 1 /* Master/Slave bit */
|
|
#define DBDES_IMMS (DBDES_I | DBDES_M | DBDES_MS)
|
|
|
|
|
|
#define LSA_T_RT 0x2001
|
|
#define LSA_T_NET 0x2002
|
|
#define LSA_T_SUM_NET 0x2003
|
|
#define LSA_T_SUM_RT 0x2004
|
|
#define LSA_T_EXT 0x4005
|
|
#define LSA_T_NSSA 0x2007
|
|
#define LSA_T_LINK 0x0008
|
|
#define LSA_T_PREFIX 0x2009
|
|
|
|
#define LSA_T_V2_MASK 0x00ff
|
|
|
|
#define LSA_UBIT 0x8000
|
|
|
|
#define LSA_SCOPE_LINK 0x0000
|
|
#define LSA_SCOPE_AREA 0x2000
|
|
#define LSA_SCOPE_AS 0x4000
|
|
#define LSA_SCOPE_RES 0x6000
|
|
#define LSA_SCOPE_MASK 0x6000
|
|
#define LSA_SCOPE(type) ((type) & LSA_SCOPE_MASK)
|
|
|
|
|
|
#define LSA_MAXAGE 3600 /* 1 hour */
|
|
#define LSA_CHECKAGE 300 /* 5 minutes */
|
|
#define LSA_MAXAGEDIFF 900 /* 15 minutes */
|
|
|
|
#define LSA_ZEROSEQNO ((s32) 0x80000000)
|
|
#define LSA_INITSEQNO ((s32) 0x80000001)
|
|
#define LSA_MAXSEQNO ((s32) 0x7fffffff)
|
|
|
|
#define LSA_METRIC_MASK 0x00FFFFFF
|
|
#define LSA_OPTIONS_MASK 0x00FFFFFF
|
|
|
|
|
|
#define LSART_PTP 1
|
|
#define LSART_NET 2
|
|
#define LSART_STUB 3
|
|
#define LSART_VLNK 4
|
|
|
|
#define LSA_RT2_LINKS 0x0000FFFF
|
|
|
|
#define LSA_SUM2_TOS 0xFF000000
|
|
|
|
#define LSA_EXT2_TOS 0x7F000000
|
|
#define LSA_EXT2_EBIT 0x80000000
|
|
|
|
#define LSA_EXT3_EBIT 0x4000000
|
|
#define LSA_EXT3_FBIT 0x2000000
|
|
#define LSA_EXT3_TBIT 0x1000000
|
|
|
|
|
|
struct ospf_lsa_header
|
|
{
|
|
u16 age; /* LS Age */
|
|
u16 type_raw; /* Type, mixed with options on OSPFv2 */
|
|
|
|
u32 id;
|
|
u32 rt; /* Advertising router */
|
|
s32 sn; /* LS Sequence number */
|
|
u16 checksum;
|
|
u16 length;
|
|
};
|
|
|
|
|
|
/* In OSPFv2, options are embedded in higher half of type_raw */
|
|
static inline u8 lsa_get_options(struct ospf_lsa_header *lsa)
|
|
{ return lsa->type_raw >> 8; }
|
|
|
|
static inline void lsa_set_options(struct ospf_lsa_header *lsa, u16 options)
|
|
{ lsa->type_raw = (lsa->type_raw & 0xff) | (options << 8); }
|
|
|
|
|
|
struct ospf_lsa_rt
|
|
{
|
|
u32 options; /* VEB flags, mixed with link count for OSPFv2 and options for OSPFv3 */
|
|
};
|
|
|
|
struct ospf_lsa_rt2_link
|
|
{
|
|
u32 id;
|
|
u32 data;
|
|
#ifdef CPU_BIG_ENDIAN
|
|
u8 type;
|
|
u8 no_tos;
|
|
u16 metric;
|
|
#else
|
|
u16 metric;
|
|
u8 no_tos;
|
|
u8 type;
|
|
#endif
|
|
};
|
|
|
|
struct ospf_lsa_rt2_tos
|
|
{
|
|
#ifdef CPU_BIG_ENDIAN
|
|
u8 tos;
|
|
u8 padding;
|
|
u16 metric;
|
|
#else
|
|
u16 metric;
|
|
u8 padding;
|
|
u8 tos;
|
|
#endif
|
|
};
|
|
|
|
struct ospf_lsa_rt3_link
|
|
{
|
|
#ifdef CPU_BIG_ENDIAN
|
|
u8 type;
|
|
u8 padding;
|
|
u16 metric;
|
|
#else
|
|
u16 metric;
|
|
u8 padding;
|
|
u8 type;
|
|
#endif
|
|
u32 lif; /* Local interface ID */
|
|
u32 nif; /* Neighbor interface ID */
|
|
u32 id; /* Neighbor router ID */
|
|
};
|
|
|
|
|
|
struct ospf_lsa_net
|
|
{
|
|
u32 optx; /* Netmask for OSPFv2, options for OSPFv3 */
|
|
u32 routers[];
|
|
};
|
|
|
|
struct ospf_lsa_sum2
|
|
{
|
|
u32 netmask;
|
|
u32 metric;
|
|
};
|
|
|
|
struct ospf_lsa_sum3_net
|
|
{
|
|
u32 metric;
|
|
u32 prefix[];
|
|
};
|
|
|
|
struct ospf_lsa_sum3_rt
|
|
{
|
|
u32 options;
|
|
u32 metric;
|
|
u32 drid;
|
|
};
|
|
|
|
struct ospf_lsa_ext2
|
|
{
|
|
u32 netmask;
|
|
u32 metric;
|
|
u32 fwaddr;
|
|
u32 tag;
|
|
};
|
|
|
|
struct ospf_lsa_ext3
|
|
{
|
|
u32 metric;
|
|
u32 rest[];
|
|
};
|
|
|
|
struct ospf_lsa_ext_local
|
|
{
|
|
ip_addr ip, fwaddr;
|
|
int pxlen;
|
|
u32 metric, ebit, fbit, tag, propagate;
|
|
u8 pxopts;
|
|
};
|
|
|
|
struct ospf_lsa_link
|
|
{
|
|
u32 options;
|
|
ip6_addr lladdr;
|
|
u32 pxcount;
|
|
u32 rest[];
|
|
};
|
|
|
|
struct ospf_lsa_prefix
|
|
{
|
|
#ifdef CPU_BIG_ENDIAN
|
|
u16 pxcount;
|
|
u16 ref_type;
|
|
#else
|
|
u16 ref_type;
|
|
u16 pxcount;
|
|
#endif
|
|
u32 ref_id;
|
|
u32 ref_rt;
|
|
u32 rest[];
|
|
};
|
|
|
|
|
|
static inline uint
|
|
lsa_net_count(struct ospf_lsa_header *lsa)
|
|
{
|
|
return (lsa->length - sizeof(struct ospf_lsa_header) - sizeof(struct ospf_lsa_net))
|
|
/ sizeof(u32);
|
|
}
|
|
|
|
/* In ospf_area->rtr we store paths to routers, but we use RID (and not IP address)
|
|
as index, so we need to encapsulate RID to IP address */
|
|
|
|
#define ipa_from_rid(x) ipa_from_u32(x)
|
|
#define ipa_to_rid(x) ipa_to_u32(x)
|
|
|
|
#define IPV6_PREFIX_SPACE(x) ((((x) + 63) / 32) * 4)
|
|
#define IPV6_PREFIX_WORDS(x) (((x) + 63) / 32)
|
|
|
|
/* FIXME: these four functions should be significantly redesigned w.r.t. integration,
|
|
also should be named as ospf3_* instead of *_ipv6_* */
|
|
|
|
static inline u32 *
|
|
lsa_get_ipv6_prefix(u32 *buf, ip_addr *addr, int *pxlen, u8 *pxopts, u16 *rest)
|
|
{
|
|
u8 pxl = (*buf >> 24);
|
|
*pxopts = (*buf >> 16);
|
|
*rest = *buf;
|
|
*pxlen = pxl;
|
|
buf++;
|
|
|
|
*addr = IPA_NONE;
|
|
|
|
#ifdef IPV6
|
|
if (pxl > 0)
|
|
_I0(*addr) = *buf++;
|
|
if (pxl > 32)
|
|
_I1(*addr) = *buf++;
|
|
if (pxl > 64)
|
|
_I2(*addr) = *buf++;
|
|
if (pxl > 96)
|
|
_I3(*addr) = *buf++;
|
|
|
|
/* Clean up remaining bits */
|
|
if (pxl < 128)
|
|
addr->addr[pxl / 32] &= u32_mkmask(pxl % 32);
|
|
#endif
|
|
|
|
return buf;
|
|
}
|
|
|
|
static inline u32 *
|
|
lsa_get_ipv6_addr(u32 *buf, ip_addr *addr)
|
|
{
|
|
*addr = *(ip_addr *) buf;
|
|
return buf + 4;
|
|
}
|
|
|
|
static inline u32 *
|
|
put_ipv6_prefix(u32 *buf, ip_addr addr UNUSED4, u8 pxlen UNUSED4, u8 pxopts UNUSED4, u16 lh UNUSED4)
|
|
{
|
|
#ifdef IPV6
|
|
*buf++ = ((pxlen << 24) | (pxopts << 16) | lh);
|
|
|
|
if (pxlen > 0)
|
|
*buf++ = _I0(addr);
|
|
if (pxlen > 32)
|
|
*buf++ = _I1(addr);
|
|
if (pxlen > 64)
|
|
*buf++ = _I2(addr);
|
|
if (pxlen > 96)
|
|
*buf++ = _I3(addr);
|
|
#endif
|
|
return buf;
|
|
}
|
|
|
|
static inline u32 *
|
|
put_ipv6_addr(u32 *buf, ip_addr addr)
|
|
{
|
|
*(ip_addr *) buf = addr;
|
|
return buf + 4;
|
|
}
|
|
|
|
|
|
struct ospf_lsreq_header
|
|
{
|
|
u32 type;
|
|
u32 id;
|
|
u32 rt;
|
|
};
|
|
|
|
|
|
|
|
#define SH_ROUTER_SELF 0xffffffff
|
|
|
|
struct lsadb_show_data {
|
|
struct symbol *name; /* Protocol to request data from */
|
|
u16 type; /* LSA Type, 0 -> all */
|
|
u16 scope; /* Scope, 0 -> all, hack to handle link scope as 1 */
|
|
u32 area; /* Specified for area scope */
|
|
u32 lsid; /* LSA ID, 0 -> all */
|
|
u32 router; /* Advertising router, 0 -> all */
|
|
};
|
|
|
|
|
|
#define EA_OSPF_METRIC1 EA_CODE(EAP_OSPF, 0)
|
|
#define EA_OSPF_METRIC2 EA_CODE(EAP_OSPF, 1)
|
|
#define EA_OSPF_TAG EA_CODE(EAP_OSPF, 2)
|
|
#define EA_OSPF_ROUTER_ID EA_CODE(EAP_OSPF, 3)
|
|
|
|
|
|
/* ospf.c */
|
|
void ospf_schedule_rtcalc(struct ospf_proto *p);
|
|
|
|
static inline void ospf_notify_rt_lsa(struct ospf_area *oa)
|
|
{ oa->update_rt_lsa = 1; }
|
|
|
|
static inline void ospf_notify_net_lsa(struct ospf_iface *ifa)
|
|
{ ifa->update_net_lsa = 1; }
|
|
|
|
static inline void ospf_notify_link_lsa(struct ospf_iface *ifa)
|
|
{ ifa->update_link_lsa = 1; }
|
|
|
|
|
|
#define ospf_is_v2(X) OSPF_IS_V2
|
|
#define ospf_is_v3(X) (!OSPF_IS_V2)
|
|
/*
|
|
static inline int ospf_is_v2(struct ospf_proto *p)
|
|
{ return p->ospf2; }
|
|
|
|
static inline int ospf_is_v3(struct ospf_proto *p)
|
|
{ return ! p->ospf2; }
|
|
*/
|
|
static inline int ospf_get_version(struct ospf_proto *p UNUSED4 UNUSED6)
|
|
{ return ospf_is_v2(p) ? 2 : 3; }
|
|
|
|
struct ospf_area *ospf_find_area(struct ospf_proto *p, u32 aid);
|
|
|
|
static inline struct ospf_area *ospf_main_area(struct ospf_proto *p)
|
|
{ return (p->areano == 1) ? HEAD(p->area_list) : p->backbone; }
|
|
|
|
static inline int oa_is_stub(struct ospf_area *oa)
|
|
{ return (oa->options & (OPT_E | OPT_N)) == 0; }
|
|
|
|
static inline int oa_is_ext(struct ospf_area *oa)
|
|
{ return oa->options & OPT_E; }
|
|
|
|
static inline int oa_is_nssa(struct ospf_area *oa)
|
|
{ return oa->options & OPT_N; }
|
|
|
|
void ospf_sh_neigh(struct proto *P, char *iff);
|
|
void ospf_sh(struct proto *P);
|
|
void ospf_sh_iface(struct proto *P, char *iff);
|
|
void ospf_sh_state(struct proto *P, int verbose, int reachable);
|
|
|
|
void ospf_sh_lsadb(struct lsadb_show_data *ld);
|
|
|
|
/* iface.c */
|
|
void ospf_iface_chstate(struct ospf_iface *ifa, u8 state);
|
|
void ospf_iface_sm(struct ospf_iface *ifa, int event);
|
|
struct ospf_iface *ospf_iface_find(struct ospf_proto *p, struct iface *what);
|
|
void ospf_if_notify(struct proto *P, uint flags, struct iface *iface);
|
|
void ospf_ifa_notify2(struct proto *P, uint flags, struct ifa *a);
|
|
void ospf_ifa_notify3(struct proto *P, uint flags, struct ifa *a);
|
|
void ospf_iface_info(struct ospf_iface *ifa);
|
|
void ospf_iface_new(struct ospf_area *oa, struct ifa *addr, struct ospf_iface_patt *ip);
|
|
void ospf_iface_new_vlink(struct ospf_proto *p, struct ospf_iface_patt *ip);
|
|
void ospf_iface_remove(struct ospf_iface *ifa);
|
|
void ospf_iface_shutdown(struct ospf_iface *ifa);
|
|
int ospf_iface_assure_bufsize(struct ospf_iface *ifa, uint plen);
|
|
int ospf_iface_reconfigure(struct ospf_iface *ifa, struct ospf_iface_patt *new);
|
|
void ospf_reconfigure_ifaces(struct ospf_proto *p);
|
|
void ospf_open_vlink_sk(struct ospf_proto *p);
|
|
struct nbma_node *find_nbma_node_(list *nnl, ip_addr ip);
|
|
|
|
static inline struct nbma_node * find_nbma_node(struct ospf_iface *ifa, ip_addr ip)
|
|
{ return find_nbma_node_(&ifa->nbma_list, ip); }
|
|
|
|
/* neighbor.c */
|
|
struct ospf_neighbor *ospf_neighbor_new(struct ospf_iface *ifa);
|
|
void ospf_neigh_sm(struct ospf_neighbor *n, int event);
|
|
void ospf_dr_election(struct ospf_iface *ifa);
|
|
struct ospf_neighbor *find_neigh(struct ospf_iface *ifa, u32 rid);
|
|
struct ospf_neighbor *find_neigh_by_ip(struct ospf_iface *ifa, ip_addr ip);
|
|
void ospf_neigh_update_bfd(struct ospf_neighbor *n, int use_bfd);
|
|
void ospf_sh_neigh_info(struct ospf_neighbor *n);
|
|
|
|
/* packet.c */
|
|
void ospf_pkt_fill_hdr(struct ospf_iface *ifa, void *buf, u8 h_type);
|
|
int ospf_rx_hook(sock * sk, uint size);
|
|
// void ospf_tx_hook(sock * sk);
|
|
void ospf_err_hook(sock * sk, int err);
|
|
void ospf_verr_hook(sock *sk, int err);
|
|
void ospf_send_to(struct ospf_iface *ifa, ip_addr ip);
|
|
void ospf_send_to_agt(struct ospf_iface *ifa, u8 state);
|
|
void ospf_send_to_bdr(struct ospf_iface *ifa);
|
|
|
|
static inline uint ospf_pkt_maxsize(struct ospf_iface *ifa)
|
|
{ return ifa->tx_length - ifa->tx_hdrlen; }
|
|
|
|
static inline void ospf_send_to_all(struct ospf_iface *ifa)
|
|
{ ospf_send_to(ifa, ifa->all_routers); }
|
|
|
|
static inline void ospf_send_to_des(struct ospf_iface *ifa)
|
|
{
|
|
if (ipa_nonzero(ifa->des_routers))
|
|
ospf_send_to(ifa, ifa->des_routers);
|
|
else
|
|
ospf_send_to_bdr(ifa);
|
|
}
|
|
|
|
#ifndef PARSER
|
|
#define DROP(DSC,VAL) do { err_dsc = DSC; err_val = VAL; goto drop; } while(0)
|
|
#define DROP1(DSC) do { err_dsc = DSC; goto drop; } while(0)
|
|
#define SKIP(DSC) do { err_dsc = DSC; goto skip; } while(0)
|
|
#endif
|
|
|
|
static inline uint ospf_pkt_hdrlen(struct ospf_proto *p UNUSED4 UNUSED6)
|
|
{ return ospf_is_v2(p) ? (sizeof(struct ospf_packet) + sizeof(union ospf_auth)) : sizeof(struct ospf_packet); }
|
|
|
|
static inline void * ospf_tx_buffer(struct ospf_iface *ifa)
|
|
{ return ifa->sk->tbuf; }
|
|
|
|
/* hello.c */
|
|
#define OHS_HELLO 0
|
|
#define OHS_POLL 1
|
|
#define OHS_SHUTDOWN 2
|
|
|
|
void ospf_send_hello(struct ospf_iface *ifa, int kind, struct ospf_neighbor *dirn);
|
|
void ospf_receive_hello(struct ospf_packet *pkt, struct ospf_iface *ifa, struct ospf_neighbor *n, ip_addr faddr);
|
|
|
|
/* dbdes.c */
|
|
void ospf_send_dbdes(struct ospf_proto *p, struct ospf_neighbor *n);
|
|
void ospf_rxmt_dbdes(struct ospf_proto *p, struct ospf_neighbor *n);
|
|
void ospf_receive_dbdes(struct ospf_packet *pkt, struct ospf_iface *ifa, struct ospf_neighbor *n);
|
|
|
|
/* lsreq.c */
|
|
void ospf_send_lsreq(struct ospf_proto *p, struct ospf_neighbor *n);
|
|
void ospf_receive_lsreq(struct ospf_packet *pkt, struct ospf_iface *ifa, struct ospf_neighbor *n);
|
|
|
|
/* lsupd.c */
|
|
void ospf_dump_lsahdr(struct ospf_proto *p, struct ospf_lsa_header *lsa_n);
|
|
void ospf_dump_common(struct ospf_proto *p, struct ospf_packet *pkt);
|
|
void ospf_lsa_lsrt_down_(struct top_hash_entry *en, struct ospf_neighbor *n, struct top_hash_entry *ret);
|
|
void ospf_add_flushed_to_lsrt(struct ospf_proto *p, struct ospf_neighbor *n);
|
|
void ospf_flood_event(void *ptr);
|
|
int ospf_flood_lsa(struct ospf_proto *p, struct top_hash_entry *en, struct ospf_neighbor *from);
|
|
int ospf_send_lsupd(struct ospf_proto *p, struct top_hash_entry **lsa_list, uint lsa_count, struct ospf_neighbor *n);
|
|
void ospf_rxmt_lsupd(struct ospf_proto *p, struct ospf_neighbor *n);
|
|
void ospf_receive_lsupd(struct ospf_packet *pkt, struct ospf_iface *ifa, struct ospf_neighbor *n);
|
|
|
|
/* lsack.c */
|
|
void ospf_enqueue_lsack(struct ospf_neighbor *n, struct ospf_lsa_header *h_n, int queue);
|
|
void ospf_reset_lsack_queue(struct ospf_neighbor *n);
|
|
void ospf_send_lsack(struct ospf_proto *p, struct ospf_neighbor *n, int queue);
|
|
void ospf_receive_lsack(struct ospf_packet *pkt, struct ospf_iface *ifa, struct ospf_neighbor *n);
|
|
|
|
|
|
#include "proto/ospf/rt.h"
|
|
#include "proto/ospf/topology.h"
|
|
#include "proto/ospf/lsalib.h"
|
|
|
|
#endif /* _BIRD_OSPF_H_ */
|