libnl 3.5.0

basic.c
1 /*
2 * lib/cli/cls/basic.c basic classifier module for CLI lib
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation version 2.1
7 * of the License.
8 *
9 * Copyright (c) 2010-2011 Thomas Graf <tgraf@suug.ch>
10 */
11
12 #include <netlink/cli/utils.h>
13 #include <netlink/cli/tc.h>
14 #include <netlink/cli/cls.h>
15 #include <netlink/route/cls/basic.h>
16
17 static void print_usage(void)
18 {
19 printf(
20 "Usage: nl-cls-add [...] basic [OPTIONS]...\n"
21 "\n"
22 "OPTIONS\n"
23 " -h, --help Show this help text.\n"
24 " -t, --target=ID Target class to send matching packets to\n"
25 " -e, --ematch=EXPR Ematch expression\n"
26 "\n"
27 "EXAMPLE"
28 " # Create a \"catch-all\" classifier, attached to \"q_root\", classyfing\n"
29 " # all not yet classified packets to class \"c_default\"\n"
30 " nl-cls-add --dev=eth0 --parent=q_root basic --target=c_default\n");
31 }
32
33 static void parse_argv(struct rtnl_tc *tc, int argc, char **argv)
34 {
35 struct rtnl_cls *cls = (struct rtnl_cls *) tc;
36 struct rtnl_ematch_tree *tree;
37 uint32_t target;
38 int err;
39
40 for (;;) {
41 int c, optidx = 0;
42 enum {
43 ARG_TARGET = 257,
44 ARG_DEFAULT = 258,
45 };
46 static struct option long_opts[] = {
47 { "help", 0, 0, 'h' },
48 { "target", 1, 0, 't' },
49 { "ematch", 1, 0, 'e' },
50 { 0, 0, 0, 0 }
51 };
52
53 c = getopt_long(argc, argv, "ht:e:", long_opts, &optidx);
54 if (c == -1)
55 break;
56
57 switch (c) {
58 case 'h':
59 print_usage();
60 exit(0);
61
62 case 't':
63 if ((err = rtnl_tc_str2handle(optarg, &target)) < 0)
64 nl_cli_fatal(err, "Unable to parse target \"%s\":",
65 optarg, nl_geterror(err));
66
67 rtnl_basic_set_target(cls, target);
68 break;
69
70 case 'e':
71 tree = nl_cli_cls_parse_ematch(cls, optarg);
72 rtnl_basic_set_ematch(cls, tree);
73 break;
74 }
75 }
76 }
77
78 static struct nl_cli_tc_module basic_module =
79 {
80 .tm_name = "basic",
81 .tm_type = RTNL_TC_TYPE_CLS,
82 .tm_parse_argv = parse_argv,
83 };
84
85 static void __init basic_init(void)
86 {
87 nl_cli_tc_register(&basic_module);
88 }
89
90 static void __exit basic_exit(void)
91 {
92 nl_cli_tc_unregister(&basic_module);
93 }
rtnl_tc_str2handle
int rtnl_tc_str2handle(const char *str, uint32_t *res)
Convert a charactering strint to a traffic control handle.
Definition: classid.c:155
nl_cli_tc_module
Definition: tc.h:28
nl_cli_fatal
void nl_cli_fatal(int err, const char *fmt,...)
Print error message and quit application.
Definition: utils.c:78