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    1: /*  
    2:  *  This file is free software: you may copy, redistribute and/or modify it  
    3:  *  under the terms of the GNU General Public License as published by the  
    4:  *  Free Software Foundation, either version 2 of the License, or (at your  
    5:  *  option) any later version.  
    6:  *  
    7:  *  This file is distributed in the hope that it will be useful, but  
    8:  *  WITHOUT ANY WARRANTY; without even the implied warranty of  
    9:  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU  
   10:  *  General Public License for more details.  
   11:  *  
   12:  *  You should have received a copy of the GNU General Public License  
   13:  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.  
   14:  *  
   15:  * This file incorporates work covered by the following copyright and  
   16:  * permission notice:  
   17:  *  
   18: Copyright 2011 by Matthieu Boutier and Juliusz Chroboczek
   19: 
   20: Permission is hereby granted, free of charge, to any person obtaining a copy
   21: of this software and associated documentation files (the "Software"), to deal
   22: in the Software without restriction, including without limitation the rights
   23: to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   24: copies of the Software, and to permit persons to whom the Software is
   25: furnished to do so, subject to the following conditions:
   26: 
   27: The above copyright notice and this permission notice shall be included in
   28: all copies or substantial portions of the Software.
   29: 
   30: THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   31: IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   32: FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
   33: AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   34: LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   35: OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
   36: THE SOFTWARE.
   37: */
   38: 
   39: #ifndef BABEL_INTERFACE_H
   40: #define BABEL_INTERFACE_H
   41: 
   42: #include <zebra.h>
   43: #include "zclient.h"
   44: #include "vty.h"
   45: 
   46: #define CONFIG_DEFAULT 0
   47: #define CONFIG_NO 1
   48: #define CONFIG_YES 2
   49: 
   50: /* babeld interface informations */
   51: struct babel_interface {
   52:     unsigned short flags;                     /* see below */
   53:     unsigned short cost;
   54:     int channel;
   55:     struct timeval hello_timeout;
   56:     struct timeval update_timeout;
   57:     struct timeval flush_timeout;
   58:     struct timeval update_flush_timeout;
   59:     unsigned char *ipv4;
   60:     int buffered;
   61:     int bufsize;
   62:     char have_buffered_hello;
   63:     char have_buffered_id;
   64:     char have_buffered_nh;
   65:     char have_buffered_prefix;
   66:     unsigned char buffered_id[16];
   67:     unsigned char buffered_nh[4];
   68:     unsigned char buffered_prefix[16];
   69:     unsigned char *sendbuf;
   70:     struct buffered_update *buffered_updates;
   71:     int num_buffered_updates;
   72:     int update_bufsize;
   73:     time_t bucket_time;
   74:     unsigned int bucket;
   75:     time_t last_update_time;
   76:     unsigned short hello_seqno;
   77:     unsigned hello_interval;
   78:     unsigned update_interval;
   79: 
   80:     /* For filter type slot. */
   81: #define BABEL_FILTER_IN  0
   82: #define BABEL_FILTER_OUT 1
   83: #define BABEL_FILTER_MAX 2
   84:     struct access_list *list[BABEL_FILTER_MAX];               /* Access-list. */
   85:     struct prefix_list *prefix[BABEL_FILTER_MAX];             /* Prefix-list. */
   86: };
   87: 
   88: typedef struct babel_interface babel_interface_nfo;
   89: static inline babel_interface_nfo* babel_get_if_nfo(struct interface *ifp)
   90: {
   91:     return ((babel_interface_nfo*) ifp->info);
   92: }
   93: 
   94: /* babel_interface_nfo flags */
   95: #define BABEL_IF_IS_UP         (1 << 0)
   96: #define BABEL_IF_WIRED         (1 << 1)
   97: #define BABEL_IF_SPLIT_HORIZON (1 << 2)
   98: #define BABEL_IF_LQ            (1 << 3)
   99: #define BABEL_IF_FARAWAY       (1 << 4)
  100: 
  101: /* Only INTERFERING can appear on the wire. */
  102: #define BABEL_IF_CHANNEL_UNKNOWN 0
  103: #define BABEL_IF_CHANNEL_INTERFERING 255
  104: #define BABEL_IF_CHANNEL_NONINTERFERING -2
  105: 
  106: static inline int
  107: if_up(struct interface *ifp)
  108: {
  109:     return (if_is_operative(ifp) &&
  110:             ifp->connected != NULL &&
  111:             (babel_get_if_nfo(ifp)->flags & BABEL_IF_IS_UP));
  112: }
  113: 
  114: /* types:
  115:  struct interface _ifp, struct listnode node */
  116: #define FOR_ALL_INTERFACES(_ifp, _node)                                              \
  117:     for(ALL_LIST_ELEMENTS_RO(iflist, _node, _ifp))
  118: 
  119: /* types:
  120:  struct interface *ifp, struct connected *_connected, struct listnode *node */
  121: #define FOR_ALL_INTERFACES_ADDRESSES(ifp, _connected, _node)                   \
  122:     for(ALL_LIST_ELEMENTS_RO(ifp->connected, _node, _connected))
  123: 
  124: struct buffered_update {
  125:     unsigned char id[8];
  126:     unsigned char prefix[16];
  127:     unsigned char plen;
  128:     unsigned char pad[3];
  129: };
  130: 
  131: 
  132: /* init function */
  133: void babel_if_init(void);
  134: 
  135: /* Callback functions for zebra client */
  136: int babel_interface_up (int, struct zclient *, zebra_size_t);
  137: int babel_interface_down (int, struct zclient *, zebra_size_t);
  138: int babel_interface_add (int, struct zclient *, zebra_size_t);
  139: int babel_interface_delete (int, struct zclient *, zebra_size_t);
  140: int babel_interface_address_add (int, struct zclient *, zebra_size_t);
  141: int babel_interface_address_delete (int, struct zclient *, zebra_size_t);
  142: 
  143: unsigned jitter(babel_interface_nfo *, int);
  144: unsigned update_jitter(babel_interface_nfo *babel_ifp, int urgent);
  145: /* return "true" if "address" is one of our ipv6 addresses */
  146: int is_interface_ll_address(struct interface *ifp, const unsigned char *address);
  147: /* Send retraction to all, and reset all interfaces statistics. */
  148: void babel_interface_close_all(void);
  149: extern int babel_enable_if_config_write (struct vty *);
  150: 
  151: 
  152: #endif