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vrrpd.h
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vrrpd.h
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/*==========================[ (c) GURU SOFT ]===================================
FILE : [vrrp.h]
CREATED : 00/02/02 12:12:06 LAST SAVE : 00/10/04 21:59:46
WHO : jerome@mycpu Linux 2.2.14
REMARK :
================================================================================
- 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.
==============================================================================*/
#ifndef __VRRP_H__
#define __VRRP_H__
/* system include */
#include <stdint.h>
#define VRRPD_VERSION "Advanced Vrrpd 1.15"
/* Scott added 9-4-02 */
#include <syslog.h>
#define vrrpd_log syslog
/* local include */
typedef struct { /* rfc2338.5.1 */
uint8_t vers_type; /* 0-3=type, 4-7=version */
uint8_t vrid; /* virtual router id */
uint8_t priority; /* router priority */
uint8_t naddr; /* address counter */
uint8_t auth_type; /* authentification type */
uint8_t adver_int; /* advertissement interval(in sec) */
uint16_t chksum; /* checksum (ip-like one) */
/* here <naddr> ip addresses */
/* here authentification infos */
} vrrp_pkt;
/* protocol constants */
#define INADDR_VRRP_GROUP 0xe0000012 /* multicast addr - rfc2338.5.2.2 */
#define VRRP_IP_TTL 255 /* in and out pkt ttl -- rfc2338.5.2.3 */
#define IPPROTO_VRRP 112 /* IP protocol number -- rfc2338.5.2.4*/
#define VRRP_VERSION 2 /* current version -- rfc2338.5.3.1 */
#define VRRP_PKT_ADVERT 1 /* packet type -- rfc2338.5.3.2 */
#define VRRP_PRIO_OWNER 255 /* priority of the ip owner -- rfc2338.5.3.4 */
#define VRRP_PRIO_DFL 100 /* default priority -- rfc2338.5.3.4 */
#define VRRP_PRIO_STOP 0 /* priority to stop -- rfc2338.5.3.4 */
#define VRRP_AUTH_NONE 0 /* no authentification -- rfc2338.5.3.6 */
#define VRRP_AUTH_PASS 1 /* password authentification -- rfc2338.5.3.6 */
#define VRRP_AUTH_AH 2 /* AH(IPSec) authentification - rfc2338.5.3.6 */
#define VRRP_ADVER_DFL 2 /* advert. interval (in sec) -- rfc2338.5.3.7 */
#define VRRP_PREEMPT_DFL 1 /* rfc2338.6.1.2.Preempt_Mode */
/* implementation specific */
#define VRRP_PIDDIR_DFL "/var/run" /* dir to store the pid file */
#define VRRP_PID_FORMAT "vrrpd_%s.pid" /* pid file format */
#define ETHTOOL_GLINK 0x0000000a /* Get link status (ethtool_value) */
typedef struct { /* parameters per interface -- rfc2338.6.1.1 */
int auth_type; /* authentification type. VRRP_AUTH_* */
uint8_t auth_data[8]; /* authentification data */
uint32_t ipaddr; /* the address of the interface */
char hwaddr[6]; /* WORK: lame hardcoded for ethernet !!!! */
char *ifname; /* the device name for this ipaddr */
} vrrp_if;
typedef struct {
uint32_t addr; /* the ip address */
uint8_t length; /* the ip prefix length */
int deletable; /* TRUE if one of my primary addr */
} vip_addr;
typedef struct { /* parameters per virtual router -- rfc2338.6.1.2 */
int vrid; /* virtual id. from 1(!) to 255 */
int priority; /* priority value */
int naddr; /* number of ip addresses */
vip_addr *vaddr; /* point on the ip address array */
int adver_int; /* delay between advertisements(in sec) */
#if 0 /* dynamically calculated */
double skew_time; /* skew Master_Down_Interval. (256-Prio)/256 */
int mast_down_int; /* interval for backup to declare master down*/
#endif
int preempt; /* true if a higher prio preempt a lower one */
int state; /* internal state (init/backup/master) */
int wantstate; /* user explicitly wants a state (back/mast) */
int sockfd; /* the socket descriptor */
int initF; /* true if the struct is init */
int no_vmac; /* dont handle the virtual MAC --rfc2338.7.3 */
/* rfc2336.6.2 */
uint32_t ms_down_timer;
uint32_t adver_timer;
vrrp_if vif;
int ttin_priority; /* priority value after SIGTTIN */
int ttou_priority; /* priority value after SIGTTOU */
} vrrp_rt;
/* VRRP state machine -- rfc2338.6.4 */
#define VRRP_STATE_INIT 1 /* rfc2338.6.4.1 */
#define VRRP_STATE_BACK 2 /* rfc2338.6.4.2 */
#define VRRP_STATE_MAST 3 /* rfc2338.6.4.3 */
#define VRRP_STATE_NONE 99 /* internal */
#define VRRP_LOG( str ) printf str
#define VRRP_AUTH_LEN 8
#define VRRP_IS_BAD_VID(id) ((id)<1 || (id)>255) /* rfc2338.6.1.vrid */
#define VRRP_IS_BAD_PRIORITY(p) ((p)<1 || (p)>255) /* rfc2338.6.1.prio */
#define VRRP_IS_BAD_ADVERT_INT(d) ((d)<1)
/* use the 'tcp sequence number arithmetic' to handle the wraparound.
** VRRP_TIMER_SUB: <0 if t1 precedes t2, =0 if t1 equals t2, >0 if t1 follows t2
*/
#define VRRP_TIMER_SET( val, delta ) (val) = VRRP_TIMER_CLK() + (delta)
#define VRRP_TIMER_SUB( t1, t2 ) ((int32_t)(((uint32_t)t1)-((uint32_t)t2)))
#define VRRP_TIMER_DELTA( val ) VRRP_TIMER_SUB( val, VRRP_TIMER_CLK() )
#define VRRP_TIMER_EXPIRED( val ) ((val) && VRRP_TIMER_DELTA(val)<=0)
#define VRRP_TIMER_CLR( val ) (val) = 0
#define VRRP_TIMER_IS_RUNNING( val ) (val)
#define VRRP_TIMER_HZ 1000000
uint32_t VRRP_TIMER_CLK( void )
{
struct timespec tv;
uint32_t usecs = 0;
clock_gettime(CLOCK_MONOTONIC,&tv );
usecs = (uint32_t)(tv.tv_nsec/1000);
return tv.tv_sec*VRRP_TIMER_HZ+usecs;
}
#define VRRP_TIMER_SKEW( srv ) ((256-(srv)->priority)*VRRP_TIMER_HZ/256)
#define VRRP_MIN( a , b ) ( (a) < (b) ? (a) : (b) )
#define VRRP_MAX( a , b ) ( (a) > (b) ? (a) : (b) )
#endif /* __VRRP_H__ */