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/* $OpenBSD: bgpd.h,v 1.61 2004/01/09 19:08:50 henning Exp $ */
/*
* Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef __BGPD_H__
#define __BGPD_H__
#include <sys/types.h>
#include <sys/queue.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <poll.h>
#include <stdarg.h>
#include <syslog.h>
#define BGP_VERSION 4
#define BGP_PORT 179
#define CONFFILE "/etc/bgpd.conf"
#define BGPD_USER "_bgpd"
#define PEER_DESCR_LEN 32
#define MAX_PKTSIZE 4096
#define MIN_HOLDTIME 3
#define READ_BUF_SIZE 65535
#define RT_BUF_SIZE 16384
#define BGPD_OPT_VERBOSE 0x0001
#define BGPD_OPT_VERBOSE2 0x0002
#define BGPD_OPT_NOACTION 0x0004
#define BGPD_FLAG_NO_FIB_UPDATE 0x0001
#define BGPD_LOG_UPDATES 0x0001
#define SOCKET_NAME "/var/run/bgpd.sock"
#define F_BGPD_INSERTED 0x01
#define F_KERNEL 0x02
#define F_CONNECTED 0x04
#define F_NEXTHOP 0x08
#define F_DOWN 0x10
#define F_STATIC 0x20
enum {
PROC_MAIN,
PROC_SE,
PROC_RDE
} bgpd_process;
enum reconf_action {
RECONF_NONE,
RECONF_KEEP,
RECONF_REINIT,
RECONF_DELETE
};
struct buf {
TAILQ_ENTRY(buf) entries;
u_char *buf;
ssize_t size;
ssize_t wpos;
ssize_t rpos;
};
struct msgbuf {
u_int32_t queued;
int sock;
TAILQ_HEAD(bufs, buf) bufs;
};
struct bgpd_addr {
sa_family_t af;
union {
struct in_addr v4;
struct in6_addr v6;
} ba; /* 128-bit address */
#define v4 ba.v4
#define v6 ba.v6
};
struct bgpd_config {
int opts;
u_int16_t as;
u_int32_t bgpid;
u_int16_t holdtime;
u_int16_t min_holdtime;
int flags;
int log;
struct sockaddr_in listen_addr;
};
struct buf_read {
u_char buf[READ_BUF_SIZE];
u_char *rptr;
ssize_t wpos;
};
struct peer_config {
u_int32_t id;
char group[PEER_DESCR_LEN];
char descr[PEER_DESCR_LEN];
struct sockaddr_in remote_addr;
struct sockaddr_in local_addr;
u_int16_t remote_as;
u_int8_t ebgp; /* 1 = ebgp, 0 = ibgp */
u_int8_t distance; /* 1 = direct, >1 = multihop */
u_int8_t passive;
u_int16_t holdtime;
u_int16_t min_holdtime;
enum reconf_action reconf_action;
};
/* ipc messages */
#define IMSG_HEADER_SIZE sizeof(struct imsg_hdr)
#define MAX_IMSGSIZE 8192
struct imsgbuf {
int sock;
pid_t pid;
struct buf_read r;
struct msgbuf w;
};
enum imsg_type {
IMSG_NONE,
IMSG_RECONF_CONF,
IMSG_RECONF_PEER,
IMSG_RECONF_DONE,
IMSG_UPDATE,
IMSG_UPDATE_ERR,
IMSG_SESSION_UP,
IMSG_SESSION_DOWN,
IMSG_MRT_REQ,
IMSG_MRT_MSG,
IMSG_MRT_END,
IMSG_KROUTE_CHANGE,
IMSG_KROUTE_DELETE,
IMSG_NEXTHOP_ADD,
IMSG_NEXTHOP_REMOVE,
IMSG_NEXTHOP_UPDATE,
IMSG_CTL_SHOW_NEIGHBOR,
IMSG_CTL_END,
IMSG_CTL_RELOAD,
IMSG_CTL_FIB_COUPLE,
IMSG_CTL_FIB_DECOUPLE,
IMSG_CTL_NEIGHBOR_UP,
IMSG_CTL_NEIGHBOR_DOWN,
IMSG_CTL_KROUTE,
IMSG_CTL_KROUTE_ADDR
};
struct imsg_hdr {
enum imsg_type type;
u_int16_t len;
u_int32_t peerid;
pid_t pid;
};
struct imsg {
struct imsg_hdr hdr;
void *data;
};
/* needed for session.h parse prototype */
LIST_HEAD(mrt_head, mrt);
/* error subcode for UPDATE; needed in SE and RDE */
enum suberr_update {
ERR_UPD_ATTRLIST = 1,
ERR_UPD_UNKNWN_WK_ATTR,
ERR_UPD_MISSNG_WK_ATTR,
ERR_UPD_ATTRFLAGS,
ERR_UPD_ATTRLEN,
ERR_UPD_ORIGIN,
ERR_UPD_LOOP,
ERR_UPD_NEXTHOP,
ERR_UPD_OPTATTR,
ERR_UPD_NETWORK,
ERR_UPD_ASPATH
};
struct kroute {
in_addr_t prefix;
u_int8_t prefixlen;
in_addr_t nexthop;
u_int8_t flags;
u_short ifindex;
};
struct kroute_nexthop {
in_addr_t nexthop;
u_int8_t valid;
u_int8_t connected;
in_addr_t gateway;
};
/* prototypes */
/* bgpd.c */
void send_nexthop_update(struct kroute_nexthop *);
void send_imsg_session(int, pid_t, void *, u_int16_t);
/* buffer.c */
struct buf *buf_open(ssize_t);
int buf_add(struct buf *, void *, ssize_t);
void *buf_reserve(struct buf *, ssize_t);
int buf_close(struct msgbuf *, struct buf *);
void buf_free(struct buf *);
void msgbuf_init(struct msgbuf *);
void msgbuf_clear(struct msgbuf *);
int msgbuf_write(struct msgbuf *);
int msgbuf_writebound(struct msgbuf *);
int msgbuf_unbounded(struct msgbuf *msgbuf);
/* log.c */
void log_init(int);
void logit(int, const char *, ...);
void vlog(int, const char *, va_list);
void log_err(const char *, ...);
void fatal(const char *);
void fatalx(const char *);
void fatal_ensure(const char *, int, const char *);
char *log_ntoa(in_addr_t);
/* parse.y */
int cmdline_symset(char *);
/* imsg.c */
void imsg_init(struct imsgbuf *, int);
int imsg_read(struct imsgbuf *);
int imsg_get(struct imsgbuf *, struct imsg *);
int imsg_compose(struct imsgbuf *, int, u_int32_t, void *, u_int16_t);
int imsg_compose_pid(struct imsgbuf *, int, pid_t, void *, u_int16_t);
void imsg_free(struct imsg *);
/* kroute.c */
int kr_init(int);
int kr_change(struct kroute *);
int kr_delete(struct kroute *);
void kr_shutdown(void);
void kr_fib_couple(void);
void kr_fib_decouple(void);
int kr_dispatch_msg(void);
int kr_nexthop_add(in_addr_t);
void kr_nexthop_delete(in_addr_t);
void kr_show_route(struct imsg *);
/* control.c */
int control_init(void);
void control_cleanup(void);
int control_imsg_relay(struct imsg *);
#endif /* __BGPD_H__ */
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