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/*
 * 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;
}