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nexthop.c

/*
 * lib/route/nexthop.c  Routing Nexthop
 *
 *    This library is free software; you can redistribute it and/or
 *    modify it under the terms of the GNU Lesser General Public
 *    License as published by the Free Software Foundation version 2.1
 *    of the License.
 *
 * Copyright (c) 2003-2006 Thomas Graf <tgraf@suug.ch>
 */

/**
 * @ingroup route_obj
 * @defgroup nexthop Nexthop
 * @{
 */

#include <netlink-local.h>
#include <netlink/netlink.h>
#include <netlink/utils.h>
#include <netlink/route/rtnl.h>
#include <netlink/route/route.h>

/**
 * @name Allocation/Freeing
 * @{
 */

struct rtnl_nexthop *rtnl_route_nh_alloc(void)
{
      struct rtnl_nexthop *nh;

      nh = calloc(1, sizeof(*nh));
      if (!nh) {
            nl_errno(ENOMEM);
            return NULL;
      }

      nl_init_list_head(&nh->rtnh_list);

      return nh;
}

struct rtnl_nexthop *rtnl_route_nh_clone(struct rtnl_nexthop *src)
{
      struct rtnl_nexthop *nh;

      nh = rtnl_route_nh_alloc();
      if (!nh)
            return NULL;

      nh->rtnh_flags = src->rtnh_flags;
      nh->rtnh_flag_mask = src->rtnh_flag_mask;
      nh->rtnh_weight = src->rtnh_weight;
      nh->rtnh_ifindex = src->rtnh_ifindex;
      nh->rtnh_mask = src->rtnh_mask;

      if (src->rtnh_gateway) {
            nh->rtnh_gateway = nl_addr_clone(src->rtnh_gateway);
            if (!nh->rtnh_gateway) {
                  free(nh);
                  return NULL;
            }
      }

      return nh;
}

void rtnl_route_nh_free(struct rtnl_nexthop *nh)
{
      nl_addr_put(nh->rtnh_gateway);
      free(nh);
}

/** @} */

/**
 * @name Attributes
 */

void rtnl_route_nh_set_weight(struct rtnl_nexthop *nh, int weight)
{
      nh->rtnh_weight = weight;
      nh->rtnh_mask |= NEXTHOP_HAS_WEIGHT;
}

int rtnl_route_nh_get_weight(struct rtnl_nexthop *nh)
{
      if (nh->rtnh_mask & NEXTHOP_HAS_WEIGHT)
            return nh->rtnh_weight;
      else
            return 0;
}

void rtnl_route_nh_set_ifindex(struct rtnl_nexthop *nh, int ifindex)
{
      nh->rtnh_ifindex = ifindex;
      nh->rtnh_mask |= NEXTHOP_HAS_IFINDEX;
}

int rtnl_route_nh_get_ifindex(struct rtnl_nexthop *nh)
{
      if (nh->rtnh_mask & NEXTHOP_HAS_IFINDEX)
            return nh->rtnh_ifindex;
      else
            return -1;
}     

void rtnl_route_nh_set_gateway(struct rtnl_nexthop *nh, struct nl_addr *addr)
{
      struct nl_addr *old = nh->rtnh_gateway;

      nh->rtnh_gateway = nl_addr_get(addr);
      if (old)
            nl_addr_put(old);

      nh->rtnh_mask |= NEXTHOP_HAS_GATEWAY;
}

struct nl_addr *rtnl_route_nh_get_gateway(struct rtnl_nexthop *nh)
{
      if (nh->rtnh_mask & NEXTHOP_HAS_GATEWAY)
            return nh->rtnh_gateway;
      else
            return NULL;
}

void rtnl_route_nh_set_flags(struct rtnl_nexthop *nh, unsigned int flags)
{
      nh->rtnh_flag_mask |= flags;
      nh->rtnh_flags |= flags;
      nh->rtnh_mask |= NEXTHOP_HAS_FLAGS;
}

void rtnl_route_nh_unset_flags(struct rtnl_nexthop *nh, unsigned int flags)
{
      nh->rtnh_flag_mask |= flags;
      nh->rtnh_flags &= ~flags;
      nh->rtnh_mask |= NEXTHOP_HAS_FLAGS;
}

unsigned int rtnl_route_nh_get_flags(struct rtnl_nexthop *nh)
{
      if (nh->rtnh_mask & NEXTHOP_HAS_FLAGS)
            return nh->rtnh_flags;
      else
            return 0;
}

/** @} */
/** @} */

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