libnl: /data/src/libnl3/src/nl-cls-list.c Source File

libnl 3.10.0

nl-cls-list.c
1/* SPDX-License-Identifier: LGPL-2.1-only */
2/*
3 * Copyright (c) 2008-2010 Thomas Graf <tgraf@suug.ch>
4 */
5
6#include "nl-default.h"
7
8#include <linux/netlink.h>
9
10#include <netlink/cli/utils.h>
11#include <netlink/cli/tc.h>
12#include <netlink/cli/cls.h>
13#include <netlink/cli/link.h>
14
15static struct nl_sock *sock;
16
17static struct nl_dump_params params = {
18 .dp_type = NL_DUMP_LINE,
19};
20
21static void print_usage(void)
22{
23 printf(
24"Usage: nl-cls-list [OPTION]...\n"
25"\n"
26"OPTIONS\n"
27" --details Show details\n"
28" --stats Show statistics\n"
29" -h, --help Show this help\n"
30" -v, --version Show versioning information\n"
31"\n"
32" -d, --dev=DEV Device the classifier is attached to. (default: all)\n"
33" -p, --parent=ID Identifier of parent class.\n"
34" -i, --id=ID Identifier.\n"
35" -k, --kind=NAME Kind of classifier (e.g. basic, u32, fw)\n"
36" --proto=PROTO Protocol to match (default: all)\n"
37" --prio=PRIO Priority (default: 0)\n"
38"\n"
39"EXAMPLE\n"
40" # Display statistics of all classes on eth0\n"
41" $ nl-cls-list --stats --dev=eth0\n"
42"\n"
43 );
44 exit(0);
45}
46
47static void __dump_link(int ifindex, struct rtnl_cls *filter)
48{
49 struct nl_cache *cache;
50 uint32_t parent = rtnl_tc_get_parent((struct rtnl_tc *) filter);
51
52 cache = nl_cli_cls_alloc_cache(sock, ifindex, parent);
53 nl_cache_dump_filter(cache, &params, OBJ_CAST(filter));
54 nl_cache_free(cache);
55}
56
57static void dump_link(struct nl_object *obj, void *arg)
58{
59 struct rtnl_link *link = nl_object_priv(obj);
60
61 __dump_link(rtnl_link_get_ifindex(link), arg);
62}
63
64int main(int argc, char *argv[])
65{
66 struct rtnl_cls *cls;
67 struct rtnl_tc *tc;
68 struct nl_cache *link_cache;
69 int ifindex;
70
71 sock = nl_cli_alloc_socket();
72 nl_cli_connect(sock, NETLINK_ROUTE);
73 link_cache = nl_cli_link_alloc_cache(sock);
74 cls = nl_cli_cls_alloc();
75 tc = (struct rtnl_tc *) cls;
76
77 params.dp_fd = stdout;
78
79 for (;;) {
80 int c, optidx = 0;
81 enum {
82 ARG_DETAILS = 257,
83 ARG_STATS = 258,
84 ARG_PROTO,
85 ARG_PRIO,
86 };
87 static struct option long_opts[] = {
88 { "details", 0, 0, ARG_DETAILS },
89 { "stats", 0, 0, ARG_STATS },
90 { "help", 0, 0, 'h' },
91 { "version", 0, 0, 'v' },
92 { "dev", 1, 0, 'd' },
93 { "parent", 1, 0, 'p' },
94 { "id", 1, 0, 'i' },
95 { "kind", 1, 0, 'k' },
96 { "proto", 1, 0, ARG_PROTO },
97 { "prio", 1, 0, ARG_PRIO },
98 { 0, 0, 0, 0 }
99 };
100
101 c = getopt_long(argc, argv, "hvd:p:i:k:", long_opts, &optidx);
102 if (c == -1)
103 break;
104
105 switch (c) {
106 case ARG_DETAILS: params.dp_type = NL_DUMP_DETAILS; break;
107 case ARG_STATS: params.dp_type = NL_DUMP_STATS; break;
108 case 'h': print_usage(); break;
109 case 'v': nl_cli_print_version(); break;
110 case 'd': nl_cli_tc_parse_dev(tc, link_cache, optarg); break;
111 case 'p': nl_cli_tc_parse_parent(tc, optarg); break;
112 case 'i': nl_cli_tc_parse_handle(tc, optarg, 0); break;
113 case 'k': nl_cli_tc_parse_kind(tc, optarg); break;
114 case ARG_PROTO: nl_cli_cls_parse_proto(cls, optarg); break;
115 case ARG_PRIO:
116 rtnl_cls_set_prio(cls, nl_cli_parse_u32(optarg));
117 break;
118 }
119 }
120
121 if ((ifindex = rtnl_tc_get_ifindex(tc)))
122 __dump_link(ifindex, cls);
123 else
124 nl_cache_foreach(link_cache, dump_link, cls);
125
126 return 0;
127}
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:1283
nl_cache_free
void nl_cache_free(struct nl_cache *cache)
Free a cache.
Definition cache.c:409
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
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:36
rtnl_link_get_ifindex
int rtnl_link_get_ifindex(struct rtnl_link *link)
Return interface index of link object.
Definition link.c:2192
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:516
rtnl_tc_get_ifindex
int rtnl_tc_get_ifindex(struct rtnl_tc *tc)
Return interface index of traffic control object.
Definition tc.c:292
NL_DUMP_STATS
@ NL_DUMP_STATS
Dump all attributes including statistics.
Definition types.h:22
NL_DUMP_LINE
@ NL_DUMP_LINE
Dump object briefly on one line.
Definition types.h:20
NL_DUMP_DETAILS
@ NL_DUMP_DETAILS
Dump all attributes but no statistics.
Definition types.h:21
nl_dump_params
Dumping parameters.
Definition types.h:32
nl_dump_params::dp_type
enum nl_dump_type dp_type
Specifies the type of dump that is requested.
Definition types.h:36
nl_dump_params::dp_fd
FILE * dp_fd
File descriptor the dumping output should go to.
Definition types.h:81
rtnl_link
Link object.
Definition nl-route.h:29
rtnl_tc
Definition nl-route.h:114