libnl 3.5.0

nl-cls-list.c
1 /* SPDX-License-Identifier: LGPL-2.1-only */
2 /*
3 * src/nl-cls-list.c List classifiers
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation version 2.1
8 * of the License.
9 *
10 * Copyright (c) 2008-2010 Thomas Graf <tgraf@suug.ch>
11 */
12
13 #include <netlink/cli/utils.h>
14 #include <netlink/cli/tc.h>
15 #include <netlink/cli/cls.h>
16 #include <netlink/cli/link.h>
17
18 #include <linux/netlink.h>
19
20 static struct nl_sock *sock;
21
22 static struct nl_dump_params params = {
23 .dp_type = NL_DUMP_LINE,
24 };
25
26 static void print_usage(void)
27 {
28 printf(
29 "Usage: nl-cls-list [OPTION]...\n"
30 "\n"
31 "OPTIONS\n"
32 " --details Show details\n"
33 " --stats Show statistics\n"
34 " -h, --help Show this help\n"
35 " -v, --version Show versioning information\n"
36 "\n"
37 " -d, --dev=DEV Device the classifier is attached to. (default: all)\n"
38 " -p, --parent=ID Identifier of parent class.\n"
39 " -i, --id=ID Identifier.\n"
40 " -k, --kind=NAME Kind of classifier (e.g. basic, u32, fw)\n"
41 " --proto=PROTO Protocol to match (default: all)\n"
42 " --prio=PRIO Priority (default: 0)\n"
43 "\n"
44 "EXAMPLE\n"
45 " # Display statistics of all classes on eth0\n"
46 " $ nl-cls-list --stats --dev=eth0\n"
47 "\n"
48 );
49 exit(0);
50 }
51
52 static void __dump_link(int ifindex, struct rtnl_cls *filter)
53 {
54 struct nl_cache *cache;
55 uint32_t parent = rtnl_tc_get_parent((struct rtnl_tc *) filter);
56
57 cache = nl_cli_cls_alloc_cache(sock, ifindex, parent);
58 nl_cache_dump_filter(cache, &params, OBJ_CAST(filter));
59 nl_cache_free(cache);
60 }
61
62 static void dump_link(struct nl_object *obj, void *arg)
63 {
64 struct rtnl_link *link = nl_object_priv(obj);
65
66 __dump_link(rtnl_link_get_ifindex(link), arg);
67 }
68
69 int main(int argc, char *argv[])
70 {
71 struct rtnl_cls *cls;
72 struct rtnl_tc *tc;
73 struct nl_cache *link_cache;
74 int ifindex;
75
76 sock = nl_cli_alloc_socket();
77 nl_cli_connect(sock, NETLINK_ROUTE);
78 link_cache = nl_cli_link_alloc_cache(sock);
79 cls = nl_cli_cls_alloc();
80 tc = (struct rtnl_tc *) cls;
81
82 params.dp_fd = stdout;
83
84 for (;;) {
85 int c, optidx = 0;
86 enum {
87 ARG_DETAILS = 257,
88 ARG_STATS = 258,
89 ARG_PROTO,
90 ARG_PRIO,
91 };
92 static struct option long_opts[] = {
93 { "details", 0, 0, ARG_DETAILS },
94 { "stats", 0, 0, ARG_STATS },
95 { "help", 0, 0, 'h' },
96 { "version", 0, 0, 'v' },
97 { "dev", 1, 0, 'd' },
98 { "parent", 1, 0, 'p' },
99 { "id", 1, 0, 'i' },
100 { "kind", 1, 0, 'k' },
101 { "proto", 1, 0, ARG_PROTO },
102 { "prio", 1, 0, ARG_PRIO },
103 { 0, 0, 0, 0 }
104 };
105
106 c = getopt_long(argc, argv, "hvd:p:i:k:", long_opts, &optidx);
107 if (c == -1)
108 break;
109
110 switch (c) {
111 case ARG_DETAILS: params.dp_type = NL_DUMP_DETAILS; break;
112 case ARG_STATS: params.dp_type = NL_DUMP_STATS; break;
113 case 'h': print_usage(); break;
114 case 'v': nl_cli_print_version(); break;
115 case 'd': nl_cli_tc_parse_dev(tc, link_cache, optarg); break;
116 case 'p': nl_cli_tc_parse_parent(tc, optarg); break;
117 case 'i': nl_cli_tc_parse_handle(tc, optarg, 0); break;
118 case 'k': nl_cli_tc_parse_kind(tc, optarg); break;
119 case ARG_PROTO: nl_cli_cls_parse_proto(cls, optarg); break;
120 case ARG_PRIO:
121 rtnl_cls_set_prio(cls, nl_cli_parse_u32(optarg));
122 break;
123 }
124 }
125
126 if ((ifindex = rtnl_tc_get_ifindex(tc)))
127 __dump_link(ifindex, cls);
128 else
129 nl_cache_foreach(link_cache, dump_link, cls);
130
131 return 0;
132 }
NL_DUMP_LINE
Dump object briefly on one line.
Definition: types.h:22
nl_dump_params::dp_fd
FILE * dp_fd
File descriptor the dumping output should go to.
Definition: types.h:83
nl_dump_params::dp_type
enum nl_dump_type dp_type
Specifies the type of dump that is requested.
Definition: types.h:38
nl_cache_dump_filter
void nl_cache_dump_filter(struct nl_cache *cache, struct nl_dump_params *params, struct nl_object *filter)
Dump all elements of a cache (filtered).
Definition: cache.c:1217
rtnl_link
Link object.
NL_DUMP_DETAILS
Dump all attributes but no statistics.
Definition: types.h:23
nl_cache_free
void nl_cache_free(struct nl_cache *cache)
Free a cache.
Definition: cache.c:409
nl_cache_foreach
void nl_cache_foreach(struct nl_cache *cache, void(*cb)(struct nl_object *, void *), void *arg)
Call a callback on each element of the cache.
Definition: cache.c:1266
rtnl_tc_get_parent
uint32_t rtnl_tc_get_parent(struct rtnl_tc *tc)
Return parent identifier of a traffic control object.
Definition: tc.c:518
nl_cli_parse_u32
uint32_t nl_cli_parse_u32(const char *arg)
Parse a text based 32 bit unsigned integer argument.
Definition: utils.c:43
nl_dump_params
Dumping parameters.
Definition: types.h:33
rtnl_link_get_ifindex
int rtnl_link_get_ifindex(struct rtnl_link *link)
Return interface index of link object.
Definition: link.c:2202
rtnl_tc_get_ifindex
int rtnl_tc_get_ifindex(struct rtnl_tc *tc)
Return interface index of traffic control object.
Definition: tc.c:294
NL_DUMP_STATS
Dump all attributes including statistics.
Definition: types.h:24