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nl-tctree-dump.c

/*
 * src/nl-tctree-dump.c       Dump Traffic Control Tree
 *
 *    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>
 */

#include "utils.h"
#include <linux/pkt_sched.h>

static struct nl_handle *nl_handle;
static struct nl_cache *qdisc_cache, *class_cache;
static struct nl_dump_params dump_params = {
      .dp_type = NL_DUMP_FULL,
};

static int ifindex;
static void print_qdisc(struct nl_object *, void *);

static void print_class(struct nl_object *obj, void *arg)
{
      struct rtnl_qdisc *leaf;
      struct rtnl_class *class = (struct rtnl_class *) obj;
      struct nl_cache *cls_cache;
      uint32_t parent = rtnl_class_get_handle(class);

      dump_params.dp_prefix = (int) arg;
      nl_object_dump(obj, &dump_params);

      leaf = rtnl_class_leaf_qdisc(class, qdisc_cache);
      if (leaf)
            print_qdisc((struct nl_object *) leaf, arg + 2);

      rtnl_class_foreach_child(class, class_cache, &print_class, arg + 2);

      cls_cache = rtnl_cls_alloc_cache(nl_handle, ifindex, parent);
      if (!cls_cache)
            return;

      dump_params.dp_prefix = (int) arg + 2;
      nl_cache_dump(cls_cache, &dump_params);
      nl_cache_free(cls_cache);
}

static void print_qdisc(struct nl_object *obj, void *arg)
{
      struct rtnl_qdisc *qdisc = (struct rtnl_qdisc *) obj;
      struct nl_cache *cls_cache;
      uint32_t parent = rtnl_qdisc_get_handle(qdisc);

      dump_params.dp_prefix = (int) arg;
      nl_object_dump(obj, &dump_params);

      rtnl_qdisc_foreach_child(qdisc, class_cache, &print_class, arg + 2);

      cls_cache = rtnl_cls_alloc_cache(nl_handle, ifindex, parent);
      if (!cls_cache)
            return;

      dump_params.dp_prefix = (int) arg + 2;
      nl_cache_dump(cls_cache, &dump_params);
      nl_cache_free(cls_cache);
}

static void print_link(struct nl_object *obj, void *arg)
{
      struct rtnl_link *link = (struct rtnl_link *) obj;
      struct rtnl_qdisc *qdisc;

      ifindex = rtnl_link_get_ifindex(link);
      dump_params.dp_prefix = 0;
      nl_object_dump(obj, &dump_params);

      class_cache = rtnl_class_alloc_cache(nl_handle, ifindex);
      if (!class_cache)
            return;

      qdisc = rtnl_qdisc_get_by_parent(qdisc_cache, ifindex, TC_H_ROOT);
      if (qdisc) {
            print_qdisc((struct nl_object *) qdisc, (void *) 2);
            rtnl_qdisc_put(qdisc);
      }

      qdisc = rtnl_qdisc_get_by_parent(qdisc_cache, ifindex, 0);
      if (qdisc) {
            print_qdisc((struct nl_object *) qdisc, (void *) 2);
            rtnl_qdisc_put(qdisc);
      }

      qdisc = rtnl_qdisc_get_by_parent(qdisc_cache, ifindex, TC_H_INGRESS);
      if (qdisc) {
            print_qdisc((struct nl_object *) qdisc, (void *) 2);
            rtnl_qdisc_put(qdisc);
      }

      nl_cache_free(class_cache);
}

int main(int argc, char *argv[])
{
      struct nl_cache *link_cache;

      if (nltool_init(argc, argv) < 0)
            return -1;

      dump_params.dp_fd = stdout;

      if (argc > 1) {
            if (!strcasecmp(argv[1], "brief"))
                  dump_params.dp_type = NL_DUMP_BRIEF;
            else if (!strcasecmp(argv[1], "full"))
                  dump_params.dp_type = NL_DUMP_FULL;
            else if (!strcasecmp(argv[1], "stats"))
                  dump_params.dp_type = NL_DUMP_STATS;
      }

      nl_handle = nl_handle_alloc_nondefault(nltool_cbset);
      if (!nl_handle)
            return 1;

      if (nltool_connect(nl_handle, NETLINK_ROUTE) < 0)
            return 1;

      link_cache = nltool_alloc_link_cache(nl_handle);
      if (!link_cache)
            return 1;

      qdisc_cache = nltool_alloc_qdisc_cache(nl_handle);
      if (!qdisc_cache)
            return 1;

      nl_cache_foreach(link_cache, &print_link, NULL);

      nl_cache_free(qdisc_cache);
      nl_cache_free(link_cache);

      nl_close(nl_handle);
      nl_handle_destroy(nl_handle);
      return 0;
}

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