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freevrrpd 1.1

    1: /*
    2:  * Copyright (c) 2001,2002 Sebastien Petit <spe@bsdfr.org>
    3:  *
    4:  * Redistribution and use in source forms, with and without modification,
    5:  * are permitted provided that the following conditions are met:
    6:  * 1. Redistributions of source code must retain the above copyright notice,
    7:  *    this list of conditions and the following disclaimer.
    8:  * 2. Redistributions in binary form must reproduce the above copyright notice,
    9:  *    this list of conditions and the following disclaimer in the documentation
   10:  *    and/or other materials provided with the distribution. Obviously, it
   11:  *    would be nice if you gave credit where credit is due but requiring it
   12:  *    would be too onerous.
   13:  * 3. All advertising materials mentioning features or use of this software
   14:  *    must display the following acknowledgement:
   15:  *      This product includes software developed by Sebastien Petit.
   16:  * 4. Neither the name of its contributors may be used to endorse or promote
   17:  *    products derived from this software without specific prior written
   18:  *    permission.
   19:  *
   20:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   21:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   22:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   23:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   24:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   25:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   26:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   27:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   28:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   29:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   30:  * SUCH DAMAGE.
   31:  *
   32:  * $Id: vrrp_vlanlist.c,v 1.1.1.1 2017/06/14 12:01:54 misho Exp $
   33:  */
   34: 
   35: #include <errno.h>
   36: #include "vrrp_vlanlist.h"
   37: 
   38: /*
   39:  * We use a double chained list with sentinels ---  --- |f|->|d|->NULL
   40:  * NULL<-| |<-| | ---  ---
   41:  */
   42: 
   43: char 
   44: vrrp_vlanlist_initialize(struct vrrp_vr * vr)
   45: {
   46: 	vr->vr_if->vlanp = (struct vrrp_vlan_list *) malloc(sizeof(*(vr->vr_if->vlanp)));
   47: 	vr->vr_if->vland = (struct vrrp_vlan_list *) malloc(sizeof(*(vr->vr_if->vland)));
   48: 	if (!vr->vr_if->vlanp || !vr->vr_if->vland) {
   49: 		syslog(LOG_ERR, "Can't allocate memory for vrrp_vlanlist_initialize: %s", strerror(errno));
   50: 		return -1;
   51: 	}
   52: 	bzero(vr->vr_if->vlanp, sizeof(*vr->vr_if->vlanp));
   53: 	bzero(vr->vr_if->vland, sizeof(*vr->vr_if->vland));
   54: 	vr->vr_if->vlanp->previous = NULL;
   55: 	vr->vr_if->vlanp->next = vr->vr_if->vland;
   56: 	vr->vr_if->vland->previous = vr->vr_if->vlanp;
   57: 	vr->vr_if->vland->next = NULL;
   58: 	/*if (vrrp_vlanlist_add(vr, vlan_ifname) == -1) {
   59: 		free(vr->vr_if->vlanp);
   60: 		free(vr->vr_if->vland);
   61: 		return -1;
   62: 	} */
   63: 	return 0;
   64: }
   65: 
   66: /*
   67:  * Add a new element in list
   68:  */
   69: char 
   70: vrrp_vlanlist_add(struct vrrp_vr * vr, char *vlan_ifname)
   71: {
   72: 	struct vrrp_vlan_list *n;
   73: 
   74: 	if (!(n = (struct vrrp_vlan_list *) malloc(sizeof(*n)))) {
   75: 		syslog(LOG_ERR, "Can't allocate memory for vrrp_vlanlist_add: %s", strerror(errno));
   76: 		return -1;
   77: 	}
   78: 	bzero(n, sizeof(*n));
   79: 	strncpy(n->vlan_ifname, vlan_ifname, sizeof(n->vlan_ifname));
   80: 	n->previous = vr->vr_if->vland->previous;
   81: 	n->next = vr->vr_if->vland;
   82: 	vr->vr_if->vland->previous->next = n;
   83: 	vr->vr_if->vland->previous = n;
   84: 
   85: 	return 0;
   86: }
   87: 
   88: /*
   89:  * Enleve un element de la liste
   90:  */
   91: char 
   92: vrrp_vlanlist_delete(struct vrrp_vr * vr, char *vlan_ifname)
   93: {
   94: 	struct vrrp_vlan_list *e = vr->vr_if->vlanp;
   95: 
   96: 	while (e->next && strcpy(vlan_ifname, e->vlan_ifname))
   97: 		e = e->next;
   98: 	if (!e->next)
   99: 		return -1;
  100: 	e->next->previous = e->previous;
  101: 	e->previous->next = e->next;
  102: 	free(e);
  103: 
  104: 	return 0;
  105: }
  106: 
  107: char *
  108: vrrp_vlanlist_get_first(struct vrrp_vr * vr)
  109: {
  110: 	return vr->vr_if->vlanp->next->vlan_ifname;
  111: }
  112: 
  113: /*
  114:  * Renvoie l'adresse MAC du dernier element
  115:  */
  116: char *
  117: vrrp_vlanlist_get_last(struct vrrp_vr * vr)
  118: {
  119: 	return vr->vr_if->vland->previous->vlan_ifname;
  120: }
  121: 
  122: void 
  123: vrrp_vlanlist_destroy(struct vrrp_vr * vr)
  124: {
  125: 	vr->vr_if->vland = vr->vr_if->vland->previous;
  126: 	while (vr->vr_if->vland != vr->vr_if->vlanp) {
  127: 		free(vr->vr_if->vland->next);
  128: 		vr->vr_if->vland = vr->vr_if->vland->previous;
  129: 	}
  130: 	free(vr->vr_if->vland);
  131: 	free(vr->vr_if->vlanp);
  132: 
  133: 	return;
  134: }