forked from ocochard/FreeVRRPd
/
vrrp_vlanlist.c
134 lines (121 loc) · 4.15 KB
/
vrrp_vlanlist.c
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/*
* Copyright (c) 2001,2002 Sebastien Petit <spe@bsdfr.org>
*
* Redistribution and use in source forms, with and without modification,
* are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution. Obviously, it
* would be nice if you gave credit where credit is due but requiring it
* would be too onerous.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Sebastien Petit.
* 4. Neither the name of its contributors may be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: vrrp_vlanlist.c,v 1.1 2004/03/06 18:33:57 spe Exp $
*/
#include <errno.h>
#include "vrrp_vlanlist.h"
/*
* We use a double chained list with sentinels --- --- |f|->|d|->NULL
* NULL<-| |<-| | --- ---
*/
char
vrrp_vlanlist_initialize(struct vrrp_vr * vr)
{
vr->vr_if->vlanp = (struct vrrp_vlan_list *) malloc(sizeof(*(vr->vr_if->vlanp)));
vr->vr_if->vland = (struct vrrp_vlan_list *) malloc(sizeof(*(vr->vr_if->vland)));
if (!vr->vr_if->vlanp || !vr->vr_if->vland) {
syslog(LOG_ERR, "Can't allocate memory for vrrp_vlanlist_initialize: %s", strerror(errno));
return -1;
}
bzero(vr->vr_if->vlanp, sizeof(*vr->vr_if->vlanp));
bzero(vr->vr_if->vland, sizeof(*vr->vr_if->vland));
vr->vr_if->vlanp->previous = NULL;
vr->vr_if->vlanp->next = vr->vr_if->vland;
vr->vr_if->vland->previous = vr->vr_if->vlanp;
vr->vr_if->vland->next = NULL;
/*if (vrrp_vlanlist_add(vr, vlan_ifname) == -1) {
free(vr->vr_if->vlanp);
free(vr->vr_if->vland);
return -1;
} */
return 0;
}
/*
* Add a new element in list
*/
char
vrrp_vlanlist_add(struct vrrp_vr * vr, char *vlan_ifname)
{
struct vrrp_vlan_list *n;
if (!(n = (struct vrrp_vlan_list *) malloc(sizeof(*n)))) {
syslog(LOG_ERR, "Can't allocate memory for vrrp_vlanlist_add: %s", strerror(errno));
return -1;
}
bzero(n, sizeof(*n));
strncpy(n->vlan_ifname, vlan_ifname, sizeof(n->vlan_ifname));
n->previous = vr->vr_if->vland->previous;
n->next = vr->vr_if->vland;
vr->vr_if->vland->previous->next = n;
vr->vr_if->vland->previous = n;
return 0;
}
/*
* Enleve un element de la liste
*/
char
vrrp_vlanlist_delete(struct vrrp_vr * vr, char *vlan_ifname)
{
struct vrrp_vlan_list *e = vr->vr_if->vlanp;
while (e->next && strcpy(vlan_ifname, e->vlan_ifname))
e = e->next;
if (!e->next)
return -1;
e->next->previous = e->previous;
e->previous->next = e->next;
free(e);
return 0;
}
char *
vrrp_vlanlist_get_first(struct vrrp_vr * vr)
{
return vr->vr_if->vlanp->next->vlan_ifname;
}
/*
* Renvoie l'adresse MAC du dernier element
*/
char *
vrrp_vlanlist_get_last(struct vrrp_vr * vr)
{
return vr->vr_if->vland->previous->vlan_ifname;
}
void
vrrp_vlanlist_destroy(struct vrrp_vr * vr)
{
vr->vr_if->vland = vr->vr_if->vland->previous;
while (vr->vr_if->vland != vr->vr_if->vlanp) {
free(vr->vr_if->vland->next);
vr->vr_if->vland = vr->vr_if->vland->previous;
}
free(vr->vr_if->vland);
free(vr->vr_if->vlanp);
return;
}