138 lines
3.1 KiB
C
138 lines
3.1 KiB
C
/*
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* vrrp.h - define main struct vrrp (VRRP instance) and some
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* constants
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*
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* Copyright (C) 2014 Arnaud Andre
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*
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* This file is part of uvrrpd.
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*
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* uvrrpd is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* uvrrpd is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with uvrrpd. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _VRRP_H_
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#define _VRRP_H_
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#include <stdint.h>
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#include "common.h"
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#include "vrrp_net.h"
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#include "vrrp_timer.h"
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#include "vrrp_state.h"
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#include "vrrp_ctrl.h"
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/* MAX values */
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#define VRID_MAX 255
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#define VRRP_PRIO_MAX 255
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#define ADVINT_MAX 4095 /* RFC5798 */
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#define PRIO_OWNER VRRP_PRIO_MAX
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/* DEFAULT values */
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#define PREEMPT_DFL TRUE
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#define PRIO_DFL 100
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/* External script */
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#define VRRP_SCRIPT stringify(PATH) "/vrrp_switch.sh"
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#define VRRP_SCRIPT_MAX sysconf(_SC_ARG_MAX)
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/* preemption */
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#define STR_PREEMPT(s) (s == TRUE ? "true" : "false")
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/**
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* vrrp_version - VRRP version protocol
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* @RFC2338 : VRRPv2 (deprecated)
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* @RFC3768 : VRRPv2
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* @RFC5798 : VRRPv3
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*/
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typedef enum {
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RFC2338 = 2,
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RFC3768 = 2,
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RFC5798 = 3
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} vrrp_version;
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/**
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* vrrp_authtype - Authentication type
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* (from VRRPv2 / rfc2332)
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*/
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#define VRRP_AUTH_PASS_LEN 8
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typedef enum {
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NOAUTH,
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SIMPLE,
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HMAC /* not supported */
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} vrrp_authtype;
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/**
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* vrrp - Main structure defining VRRP instance
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*/
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struct vrrp {
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vrrp_version version; /* VRRP version */
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uint8_t vrid; /* VRID 1 - 255 */
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uint8_t priority; /* PRIO 0 - 255 */
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uint8_t naddr; /* count ip addresses */
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/* Advertisement interval
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*
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* VRRPv2 :
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* - delay in s
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* - default 1s
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* - 8 bits field
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*
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* VRRPv3 :
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* - delay in centisecond
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* - default 100cs (1s)
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* - 12 bits field
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*/
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uint16_t adv_int;
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/* Master advertisement interval
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* only in VRRPv3 / rfc5798
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*/
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uint16_t master_adv_int;
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vrrp_authtype auth_type;
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char *auth_data;
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vrrp_state state;
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bool preempt;
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char *scriptname;
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char **argv;
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/* control cmd fifo */
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struct vrrp_ctrl ctrl;
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struct vrrp_timer adv_timer;
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struct vrrp_timer masterdown_timer;
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};
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/**
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* enum vrrp_ret - Return code used in vrrp_net_listen
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*/
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enum _vrrp_event_type {
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VRID_MISMATCH = -2, /* vrid mismatch */
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INVALID = -1, /* invalid pkt */
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PKT, /* valid packet */
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SIGNAL, /* signal catch */
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CTRL_FIFO, /* ctrl cmd event */
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TIMER /* timer expired */
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};
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typedef enum _vrrp_event_type vrrp_event_t;
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/* funcs */
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void vrrp_init(struct vrrp *vrrp);
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void vrrp_cleanup(struct vrrp *vrrp);
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int vrrp_process(struct vrrp *vrrp, struct vrrp_net *vnet);
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vrrp_event_t vrrp_listen(struct vrrp *vrrp, struct vrrp_net *vnet);
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#endif /* _VRRP_H_ */
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