ripngd/ripng_offset.c

   1 /* RIPng offset-list
   2  * Copyright (C) 2000 Kunihiro Ishiguro <kunihiro@zebra.org>
   3  *
   4  * This file is part of GNU Zebra.
   5  *
   6  * GNU Zebra is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the
   8  * Free Software Foundation; either version 2, or (at your option) any
   9  * later version.
  10  *
  11  * GNU Zebra is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; see the file COPYING; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 /* RIPng support by Vincent Jardin <vincent.jardin@6wind.com>
  22  * Copyright (C) 2002 6WIND
  23  */
  24
  25 #include <zebra.h>
  26
  27 #include "if.h"
  28 #include "prefix.h"
  29 #include "filter.h"
  30 #include "command.h"
  31 #include "linklist.h"
  32 #include "memory.h"
  33
  34 #include "ripngd/ripngd.h"
  35
  36 #define OFFSET_LIST_IN_NAME(O)  ((O)->direct[RIPNG_OFFSET_LIST_IN].alist_name)
  37 #define OFFSET_LIST_IN_METRIC(O)  ((O)->direct[RIPNG_OFFSET_LIST_IN].metric)
  38
  39 #define OFFSET_LIST_OUT_NAME(O)  ((O)->direct[RIPNG_OFFSET_LIST_OUT].alist_name)
  40 #define OFFSET_LIST_OUT_METRIC(O)  ((O)->direct[RIPNG_OFFSET_LIST_OUT].metric)
  41
  42 struct ripng_offset_list *ripng_offset_list_new(const char *ifname)
  43 {
  44         struct ripng_offset_list *new;
  45
  46         new = XCALLOC(MTYPE_RIPNG_OFFSET_LIST,
  47                       sizeof(struct ripng_offset_list));
  48         new->ifname = strdup(ifname);
  49         listnode_add_sort(ripng->offset_list_master, new);
  50
  51         return new;
  52 }
  53
  54 void ripng_offset_list_del(struct ripng_offset_list *offset)
  55 {
  56         listnode_delete(ripng->offset_list_master, offset);
  57         if (OFFSET_LIST_IN_NAME(offset))
  58                 free(OFFSET_LIST_IN_NAME(offset));
  59         if (OFFSET_LIST_OUT_NAME(offset))
  60                 free(OFFSET_LIST_OUT_NAME(offset));
  61         free(offset->ifname);
  62         XFREE(MTYPE_RIPNG_OFFSET_LIST, offset);
  63 }
  64
  65 struct ripng_offset_list *ripng_offset_list_lookup(const char *ifname)
  66 {
  67         struct ripng_offset_list *offset;
  68         struct listnode *node, *nnode;
  69
  70         for (ALL_LIST_ELEMENTS(ripng->offset_list_master, node, nnode,
  71                                offset)) {
  72                 if (strcmp(offset->ifname, ifname) == 0)
  73                         return offset;
  74         }
  75         return NULL;
  76 }
  77
  78 /* If metric is modifed return 1. */
  79 int ripng_offset_list_apply_in(struct prefix_ipv6 *p, struct interface *ifp,
  80                                uint8_t *metric)
  81 {
  82         struct ripng_offset_list *offset;
  83         struct access_list *alist;
  84
  85         /* Look up offset-list with interface name. */
  86         offset = ripng_offset_list_lookup(ifp->name);
  87         if (offset && OFFSET_LIST_IN_NAME(offset)) {
  88                 alist = access_list_lookup(AFI_IP6,
  89                                            OFFSET_LIST_IN_NAME(offset));
  90
  91                 if (alist
  92                     && access_list_apply(alist, (struct prefix *)p)
  93                                == FILTER_PERMIT) {
  94                         *metric += OFFSET_LIST_IN_METRIC(offset);
  95                         return 1;
  96                 }
  97                 return 0;
  98         }
  99         /* Look up offset-list without interface name. */
 100         offset = ripng_offset_list_lookup("*");
 101         if (offset && OFFSET_LIST_IN_NAME(offset)) {
 102                 alist = access_list_lookup(AFI_IP6,
 103                                            OFFSET_LIST_IN_NAME(offset));
 104
 105                 if (alist
 106                     && access_list_apply(alist, (struct prefix *)p)
 107                                == FILTER_PERMIT) {
 108                         *metric += OFFSET_LIST_IN_METRIC(offset);
 109                         return 1;
 110                 }
 111                 return 0;
 112         }
 113         return 0;
 114 }
 115
 116 /* If metric is modifed return 1. */
 117 int ripng_offset_list_apply_out(struct prefix_ipv6 *p, struct interface *ifp,
 118                                 uint8_t *metric)
 119 {
 120         struct ripng_offset_list *offset;
 121         struct access_list *alist;
 122
 123         /* Look up offset-list with interface name. */
 124         offset = ripng_offset_list_lookup(ifp->name);
 125         if (offset && OFFSET_LIST_OUT_NAME(offset)) {
 126                 alist = access_list_lookup(AFI_IP6,
 127                                            OFFSET_LIST_OUT_NAME(offset));
 128
 129                 if (alist
 130                     && access_list_apply(alist, (struct prefix *)p)
 131                                == FILTER_PERMIT) {
 132                         *metric += OFFSET_LIST_OUT_METRIC(offset);
 133                         return 1;
 134                 }
 135                 return 0;
 136         }
 137
 138         /* Look up offset-list without interface name. */
 139         offset = ripng_offset_list_lookup("*");
 140         if (offset && OFFSET_LIST_OUT_NAME(offset)) {
 141                 alist = access_list_lookup(AFI_IP6,
 142                                            OFFSET_LIST_OUT_NAME(offset));
 143
 144                 if (alist
 145                     && access_list_apply(alist, (struct prefix *)p)
 146                                == FILTER_PERMIT) {
 147                         *metric += OFFSET_LIST_OUT_METRIC(offset);
 148                         return 1;
 149                 }
 150                 return 0;
 151         }
 152         return 0;
 153 }
 154
 155 int offset_list_cmp(struct ripng_offset_list *o1, struct ripng_offset_list *o2)
 156 {
 157         return strcmp(o1->ifname, o2->ifname);
 158 }