nl-cls-add.c

/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Copyright (c) 2003-2011 Thomas Graf <tgraf@suug.ch>
 */
 
#include <netlink/cli/utils.h>
#include <netlink/cli/tc.h>
#include <netlink/cli/cls.h>
#include <netlink/cli/link.h>
 
#include <netlink-private/route/tc-api.h>
 
#include <linux/netlink.h>
 
static int quiet = 0;
 
static void print_usage(void)
{
        printf(
"Usage: nl-cls-add [OPTIONS]... classifier [CONFIGURATION]...\n"
"\n"
"OPTIONS\n"
" -q, --quiet               Do not print informal notifications.\n"
" -h, --help                Show this help text.\n"
" -v, --version             Show versioning information.\n"
"     --update              Update classifier if it exists.\n"
"     --update-only         Only update classifier, never create it.\n"
" -d, --dev=DEV             Network device the classifier should be attached to.\n"
" -i, --id=ID               ID of new classifier (default: auto-generated)\n"
" -p, --parent=ID           ID of parent { root | ingress | class-ID }\n"
"     --proto=PROTO         Protocol to match (default: all)\n"
"     --prio=PRIO           Priority (default: 0)\n"
"     --mtu=SIZE            Overwrite MTU (default: MTU of network device)\n"
"     --mpu=SIZE            Minimum packet size on the link (default: 0).\n"
"     --overhead=SIZE       Overhead in bytes per packet (default: 0).\n"
"     --linktype=TYPE       Overwrite linktype (default: type of network device)\n"
"\n"
"CONFIGURATION\n"
" -h, --help                Show help text of classifier specific options.\n"
"\n"
"EXAMPLE\n"
"   $ nl-cls-add --dev=eth1 --parent=q_root basic --target c_www\n"
"\n"
        );
        exit(0);
}
 
int main(int argc, char *argv[])
{
        struct nl_sock *sock;
        struct rtnl_cls *cls;
        struct rtnl_tc *tc;
        struct nl_cache *link_cache;
        struct nl_dump_params dp = {
                .dp_type = NL_DUMP_DETAILS,
                .dp_fd = stdout,
        };
        struct nl_cli_tc_module *tm;
        struct rtnl_tc_ops *ops;
        int err, flags = NLM_F_CREATE | NLM_F_EXCL;
        char *kind, *id = NULL;
 
        sock = nl_cli_alloc_socket();
        nl_cli_connect(sock, NETLINK_ROUTE);
 
        link_cache = nl_cli_link_alloc_cache(sock);
 
        cls = nl_cli_cls_alloc();
        tc = (struct rtnl_tc *) cls;
 
        for (;;) {
                int c, optidx = 0;
                enum {
                        ARG_UPDATE = 257,
                        ARG_UPDATE_ONLY = 258,
                        ARG_MTU,
                        ARG_MPU,
                        ARG_OVERHEAD,
                        ARG_LINKTYPE,
                        ARG_PROTO,
                        ARG_PRIO,
                };
                static struct option long_opts[] = {
                        { "quiet", 0, 0, 'q' },
                        { "help", 0, 0, 'h' },
                        { "version", 0, 0, 'v' },
                        { "dev", 1, 0, 'd' },
                        { "parent", 1, 0, 'p' },
                        { "id", 1, 0, 'i' },
                        { "proto", 1, 0, ARG_PROTO },
                        { "prio", 1, 0, ARG_PRIO },
                        { "update", 0, 0, ARG_UPDATE },
                        { "update-only", 0, 0, ARG_UPDATE_ONLY },
                        { "mtu", 1, 0, ARG_MTU },
                        { "mpu", 1, 0, ARG_MPU },
                        { "overhead", 1, 0, ARG_OVERHEAD },
                        { "linktype", 1, 0, ARG_LINKTYPE },
                        { 0, 0, 0, 0 }
                };
 
                c = getopt_long(argc, argv, "+qhvd:p:i:",
                                long_opts, &optidx);
                if (c == -1)
                        break;
 
                switch (c) {
                case 'q': quiet = 1; break;
                case 'h': print_usage(); break;
                case 'v': nl_cli_print_version(); break;
                case 'd': nl_cli_tc_parse_dev(tc, link_cache, optarg); break;
                case 'p': nl_cli_tc_parse_parent(tc, optarg); break;
                case 'i': id = strdup(optarg); break;
                case ARG_UPDATE: flags = NLM_F_CREATE; break;
                case ARG_UPDATE_ONLY: flags = 0; break;
                case ARG_MTU: nl_cli_tc_parse_mtu(tc, optarg); break;
                case ARG_MPU: nl_cli_tc_parse_mpu(tc, optarg); break;
                case ARG_OVERHEAD: nl_cli_tc_parse_overhead(tc, optarg); break;
                case ARG_LINKTYPE: nl_cli_tc_parse_linktype(tc, optarg); break;
                case ARG_PROTO: nl_cli_cls_parse_proto(cls, optarg); break;
                case ARG_PRIO:
                        rtnl_cls_set_prio(cls, nl_cli_parse_u32(optarg));
                        break;
                }
        }
 
        if (optind >= argc)
                print_usage();
 
        if (!rtnl_tc_get_ifindex(tc))
                nl_cli_fatal(EINVAL, "You must specify a network device (--dev=XXX)");
 
        if (!rtnl_tc_get_parent(tc))
                nl_cli_fatal(EINVAL, "You must specify a parent (--parent=XXX)");
 
        if (id) {
                nl_cli_tc_parse_handle(tc, id, 1);
                free(id);
        }
 
        kind = argv[optind++];
        rtnl_tc_set_kind(tc, kind);
 
        if (!(ops = rtnl_tc_get_ops(tc)))
                nl_cli_fatal(ENOENT, "Unknown classifier \"%s\".", kind);
 
        if (!(tm = nl_cli_tc_lookup(ops)))
                nl_cli_fatal(ENOTSUP, "Classifier type \"%s\" not supported.", kind);
 
        tm->tm_parse_argv(tc, argc, argv);
 
        if (!quiet) {
                printf("Adding ");
                nl_object_dump(OBJ_CAST(cls), &dp);
        }
 
        if ((err = rtnl_cls_add(sock, cls, flags)) < 0)
                nl_cli_fatal(EINVAL, "Unable to add classifier: %s", nl_geterror(err));
 
        return 0;
}