olsrd_plugin.c

wifi 无线网络路由协议OLSR linux下C代码

/***************************************************************************
 projekt              : olsrd-quagga
 file                 : olsrd_plugin.c  
 usage                : olsrd-plugin-handler-stuff 
 copyright            : (C) 2006 by Immo 'FaUl' Wehrenberg
 e-mail               : [e-mail]
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License version 2 as     *
 *   published by the Free Software Foundation.                            *
 *                                                                         *
 ***************************************************************************/


#include <stdio.h>
#include <string.h>

#include "olsrd_plugin.h"
#include "plugin_util.h"
#include "olsr.h"
#include "scheduler.h"
#include "defs.h"
#include "quagga.h"
#include "kernel_routes.h"

#define PLUGIN_NAME    "OLSRD quagga plugin"
#define PLUGIN_VERSION "0.2.2"
#define PLUGIN_AUTHOR  "Immo 'FaUl' Wehrenberg"
#define MOD_DESC PLUGIN_NAME " " PLUGIN_VERSION " by " PLUGIN_AUTHOR
#define PLUGIN_INTERFACE_VERSION 5

static void __attribute__ ((constructor)) my_init(void);
static void __attribute__ ((destructor)) my_fini(void);

static set_plugin_parameter set_redistribute;
static set_plugin_parameter set_exportroutes;
static set_plugin_parameter set_distance;
static set_plugin_parameter set_localpref;


int olsrd_plugin_interface_version (void) {
  return PLUGIN_INTERFACE_VERSION;
}

static const struct olsrd_plugin_parameters plugin_parameters[] = {
  { .name = "redistribute", .set_plugin_parameter = &set_redistribute, },
  { .name = "ExportRoutes", .set_plugin_parameter = &set_exportroutes, },
  { .name = "Distance",     .set_plugin_parameter = &set_distance,     },
  { .name = "LocalPref",    .set_plugin_parameter = &set_localpref,    },
};

void olsrd_get_plugin_parameters (const struct olsrd_plugin_parameters **params,
				  int *size) {
  *params = plugin_parameters;
  *size = sizeof plugin_parameters / sizeof *plugin_parameters;
}

static int set_redistribute (const char *value, 
			     void *data __attribute__((unused)),
			     set_plugin_parameter_addon addon __attribute__((unused))) {
  const char *zebra_route_types[] = {"system","kernel","connect",
					      "static","rip","ripng","ospf",
					      "ospf6","isis","bgp","hsls"};
  unsigned int i;

  for (i = 0; i < ARRAYSIZE(zebra_route_types); i++) {
    if (!strcmp(value, zebra_route_types[i])) {
      zebra_redistribute(i);
      return 0;
    }
  }
  return 1;
}

static int set_exportroutes (const char *value, 
			     void *data __attribute__((unused)),
			     set_plugin_parameter_addon addon __attribute__((unused))) {
  if (!strcmp(value, "only")) {
    if (!olsr_addroute_remove_function(&olsr_ioctl_add_route, AF_INET))
      puts ("AIII, could not remove the kernel route exporter");
    if (!olsr_delroute_remove_function(&olsr_ioctl_del_route, AF_INET))
      puts ("AIII, could not remove the kernel route deleter");
    olsr_addroute_add_function(&zebra_add_olsr_v4_route, AF_INET);
    olsr_delroute_add_function(&zebra_del_olsr_v4_route, AF_INET);
    zebra_export_routes(1);
  }
  else if (!strcmp(value, "additional")) {
    olsr_addroute_add_function(&zebra_add_olsr_v4_route, AF_INET);
    olsr_delroute_add_function(&zebra_del_olsr_v4_route, AF_INET);
    zebra_export_routes(1);
  }
  else zebra_export_routes(0);
  return 0;
}

static int set_distance(const char *value, void *data __attribute__((unused)), 
			set_plugin_parameter_addon addon __attribute__((unused))) {
  int distance;

  if (set_plugin_int(value, &distance, addon)) return 1;
  if (distance < 0 || distance > 255) return 1;
  zebra_olsr_distance(distance);
  return 0;
}
 
static int set_localpref(const char *value, void *data __attribute__((unused)), 
			 set_plugin_parameter_addon addon __attribute__((unused))) {
  int b;

  if (set_plugin_boolean(value, &b, addon)) return 1;
  if (b) zebra_olsr_localpref();
  return 0;
}


int olsrd_plugin_init(void) {
  if(olsr_cnf->ip_version != AF_INET) {
    fputs("see the source - ipv6 so far not supported\n" ,stderr);
    return 1;
  }

  olsr_register_scheduler_event(&zebra_check, NULL, 1, 0, NULL);
  return 0;
}

static void my_init(void) {
  init_zebra();
}

static void my_fini(void) {
  zebra_cleanup();
}