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nl-cls-delete.c

/*
 * src/nl-cls-delete.c     Delete Classifier
 *
 *    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 int interactive = 0, default_yes = 0, quiet = 0;
static int deleted = 0;
static struct nl_sock *sock;

static void print_usage(void)
{
      printf(
      "Usage: nl-cls-list [OPTION]... [CLASSIFIER]\n"
      "\n"
      "Options\n"
      " -i, --interactive     Run interactively\n"
      "     --yes             Set default answer to yes\n"
      " -q, --quiet           Do not print informal notifications\n"
      " -h, --help            Show this help\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 (0..256)\n"
      "     --id=HANDLE       Unique identifier\n"
      );
      exit(0);
}

static void delete_cb(struct nl_object *obj, void *arg)
{
      struct rtnl_cls *cls = (struct rtnl_cls *) obj;
      struct nl_dump_params params = {
            .dp_type = NL_DUMP_LINE,
            .dp_fd = stdout,
      };
      int err;

      if (interactive && !nlt_confirm(obj, &params, default_yes))
            return;

      if ((err = rtnl_cls_delete(sock, cls, 0)) < 0)
            fatal(err, "Unable to delete classifier: %s",
                  nl_geterror(err));

      if (!quiet) {
            printf("Deleted ");
            nl_object_dump(obj, &params);
      }

      deleted++;
}

int main(int argc, char *argv[])
{
      struct nl_cache *link_cache, *cls_cache;
      struct rtnl_cls *cls;
      int nf = 0, err;

      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_PRIO = 257,
                  ARG_PROTO = 258,
                  ARG_ID,
                  ARG_YES,
            };
            static struct option long_opts[] = {
                  { "interactive", 0, 0, 'i' },
                  { "yes", 0, 0, ARG_YES },
                  { "quiet", 0, 0, 'q' },
                  { "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, "iqhvd:p:", long_opts, &optidx);
            if (c == -1)
                  break;

            switch (c) {
            case 'i': interactive = 1; break;
            case ARG_YES: default_yes = 1; break;
            case 'q': quiet = 1; break;
            case 'h': print_usage(); break;
            case 'v': nlt_print_version(); break;
            case 'd': nf++; parse_dev(cls, link_cache, optarg); break;
            case 'p': nf++; parse_parent(cls, optarg); break;
            case ARG_PRIO: nf++; parse_prio(cls, optarg); break;
            case ARG_ID: nf++; parse_handle(cls, optarg); break;
            case ARG_PROTO: nf++; parse_proto(cls, optarg); break;
            }
      }

      if (nf == 0 && !interactive && !default_yes) {
            fprintf(stderr, "You attempted to delete all classifiers in "
                  "non-interactive mode, aborting.\n");
            exit(0);
      }

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

      nl_cache_foreach_filter(cls_cache, OBJ_CAST(cls), delete_cb, NULL);

      if (!quiet)
            printf("Deleted %d classifiers\n", deleted);

      return 0;
}

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