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nl-cls-list.c

/*
 * src/nl-cls-list.c          List classifiers
 *
 *    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) 2008 Thomas Graf <tgraf@suug.ch>
 */

#include "cls/utils.h"

static struct nl_sock *sock;
static struct rtnl_cls *cls;
static struct nl_dump_params params = {
      .dp_type = NL_DUMP_LINE,
};

static void print_usage(void)
{
      printf(
      "Usage: nl-cls-list [OPTION]... [CLASSIFIER]\n"
      "\n"
      "Options\n"
      " -f, --format=TYPE     Output format { brief | details | stats }\n"
      " -h, --help            Show this help text.\n"
      " -v, --version         Show versioning information.\n"
      "\n"
      "Classifier Options\n"
      " -d, --dev=DEV         Device the classifier should be assigned to.\n"
      " -p, --parent=HANDLE   Parent qdisc/class\n"
      "     --proto=PROTO     Protocol\n"
      "     --prio=NUM        Priority\n"
      "     --id=NUM          Identifier\n"
      );
      exit(0);
}

static void print_cls(struct nl_object *obj, void *arg)
{
      struct nl_cache *cls_cache;
      int err, ifindex;

      if (obj)
            ifindex = rtnl_link_get_ifindex((struct rtnl_link *) obj);
      else
            ifindex = rtnl_cls_get_ifindex(cls);

      err = rtnl_cls_alloc_cache(sock, ifindex, rtnl_cls_get_parent(cls),
                           &cls_cache);
      if (err < 0)
            fatal(err, "Unable to allocate classifier cache: %s",
                  nl_geterror(err));

      nl_cache_dump_filter(cls_cache, &params, OBJ_CAST(cls));
      nl_cache_free(cls_cache);
}

int main(int argc, char *argv[])
{
      struct nl_cache *link_cache;
      int dev = 0;

      params.dp_fd = stdout;
      sock = nlt_alloc_socket();
      nlt_connect(sock, NETLINK_ROUTE);
      link_cache = nlt_alloc_link_cache(sock);
      cls = nlt_alloc_cls();

      for (;;) {
            int c, optidx = 0;
            enum {
                  ARG_PROTO = 257,
                  ARG_PRIO = 258,
                  ARG_ID,
            };
            static struct option long_opts[] = {
                  { "format", 1, 0, 'f' },
                  { "help", 0, 0, 'h' },
                  { "version", 0, 0, 'v' },
                  { "dev", 1, 0, 'd' },
                  { "parent", 1, 0, 'p' },
                  { "proto", 1, 0, ARG_PROTO },
                  { "prio", 1, 0, ARG_PRIO },
                  { "id", 1, 0, ARG_ID },
                  { 0, 0, 0, 0 }
            };
      
            c = getopt_long(argc, argv, "+f:qhva:d:", long_opts, &optidx);
            if (c == -1)
                  break;

            switch (c) {
            case '?': exit(NLE_INVAL);
            case 'f': params.dp_type = nlt_parse_dumptype(optarg); break;
            case 'h': print_usage(); break;
            case 'v': nlt_print_version(); break;
            case 'd': dev = 1; parse_dev(cls, link_cache, optarg); break;
            case 'p': parse_parent(cls, optarg); break;
            case ARG_PRIO: parse_prio(cls, optarg); break;
            case ARG_ID: parse_handle(cls, optarg); break;
            case ARG_PROTO: parse_proto(cls, optarg); break;
            }
      }

      if (!dev)
            nl_cache_foreach(link_cache, print_cls, NULL);
      else
            print_cls(NULL, NULL);

      return 0;
}

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