libnl 3.5.0

nl-list-caches.c
1 /* SPDX-License-Identifier: LGPL-2.1-only */
2 /*
3 * nl-list-caches.c List registered cache types
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) 2003-2009 Thomas Graf <tgraf@suug.ch>
11 */
12
13 #include <netlink-private/netlink.h>
14 #include <netlink/cli/utils.h>
15
16 static void print_usage(void)
17 {
18 fprintf(stderr, "Usage: nl-list-caches\n");
19 exit(1);
20 }
21
22 static char *id_attr_list(struct nl_object_ops *ops, char *buf, size_t len)
23 {
24 if (ops->oo_attrs2str != NULL)
25 return ops->oo_attrs2str(ops->oo_id_attrs, buf, len);
26 else {
27 memset(buf, 0, len);
28 return buf;
29 }
30 }
31
32 static void print(struct nl_cache_ops *ops, void *arg)
33 {
34 char buf[64];
35
36 printf("%s:\n" \
37 " hdrsize: %d bytes\n" \
38 " protocol: %s\n" \
39 " request-update: %s\n" \
40 " msg-parser: %s\n",
41 ops->co_name, ops->co_hdrsize,
42 nl_nlfamily2str(ops->co_protocol, buf, sizeof(buf)),
43 ops->co_request_update ? "yes" : "no",
44 ops->co_msg_parser ? "yes" : "no");
45
46 if (ops->co_obj_ops) {
47 struct nl_object_ops *obj_ops = ops->co_obj_ops;
48 const char *dump_names[NL_DUMP_MAX+1] = {
49 "brief",
50 "detailed",
51 "stats",
52 };
53 int i;
54
55 printf(" cacheable object:\n" \
56 " name: %s:\n" \
57 " size: %zu bytes\n" \
58 " constructor: %s\n" \
59 " free-data: %s\n" \
60 " clone: %s\n" \
61 " compare: %s\n" \
62 " id attributes: %s\n" \
63 " dump: ",
64 obj_ops->oo_name, obj_ops->oo_size,
65 obj_ops->oo_constructor ? "yes" : "no",
66 obj_ops->oo_free_data ? "yes" : "no",
67 obj_ops->oo_clone ? "yes" : "no",
68 obj_ops->oo_compare ? "yes" : "no",
69 id_attr_list(obj_ops, buf, sizeof(buf)));
70
71 for (i = 0; i <= NL_DUMP_MAX; i++)
72 if (obj_ops->oo_dump[i])
73 printf("%s%s",
74 i == 0 ? "" : ", ",
75 dump_names[i]);
76
77 printf("\n");
78 }
79
80 if (ops->co_genl) {
81 struct genl_ops *genl_ops = ops->co_genl;
82
83 printf(" genl:\n" \
84 " name: %s\n" \
85 " user-hdr: %d\n" \
86 " id: %d\n",
87 genl_ops->o_name, genl_ops->o_hdrsize, genl_ops->o_id);
88
89 if (genl_ops->o_ncmds) {
90 int i;
91
92 printf(" cmds:\n");
93
94 for (i = 0; i < genl_ops->o_ncmds; i++) {
95 struct genl_cmd *cmd = &genl_ops->o_cmds[i];
96
97 printf(" %s:\n"
98 " id: %d\n" \
99 " maxattr: %d\n" \
100 " msg-parser: %s\n" \
101 " attr-policy: %s\n",
102 cmd->c_name, cmd->c_id, cmd->c_maxattr,
103 cmd->c_msg_parser ? "yes" : "no",
104 cmd->c_attr_policy ? "yes" : "no");
105 }
106 }
107 }
108 }
109
110 int main(int argc, char *argv[])
111 {
112 if (argc > 1 && !strcasecmp(argv[1], "-h"))
113 print_usage();
114
115 nl_cache_ops_foreach(print, NULL);
116
117 return 0;
118 }
genl_cmd::c_attr_policy
struct nla_policy * c_attr_policy
Attribute validation policy, enforced before the callback is called.
Definition: mngt.h:104
genl_ops::o_cmds
struct genl_cmd * o_cmds
Optional array defining the available Generic Netlink commands.
Definition: mngt.h:150
genl_cmd
Definition of a Generic Netlink command.
Definition: mngt.h:87
genl_cmd::c_name
char * c_name
Human readable name (required)
Definition: mngt.h:93
genl_ops::o_ncmds
int o_ncmds
Number of elements in o_cmds array.
Definition: mngt.h:153
genl_cmd::c_id
int c_id
Numeric command identifier (required)
Definition: mngt.h:90
genl_ops
Definition of a Generic Netlink family.
Definition: mngt.h:132
nl_cache_ops_foreach
void nl_cache_ops_foreach(void(*cb)(struct nl_cache_ops *, void *), void *arg)
Call a function for each registered cache operation.
Definition: cache_mngt.c:219
genl_ops::o_hdrsize
unsigned int o_hdrsize
Length of user header.
Definition: mngt.h:135
genl_ops::o_id
int o_id
Numeric identifier, automatically filled in by genl_ops_resolve()
Definition: mngt.h:138
genl_ops::o_name
char * o_name
Human readable name, used by genl_ops_resolve() to resolve numeric id.
Definition: mngt.h:141
genl_cmd::c_msg_parser
int(* c_msg_parser)(struct nl_cache_ops *, struct genl_cmd *, struct genl_info *, void *)
Called whenever a message for this command is received.
Definition: mngt.h:99
genl_cmd::c_maxattr
int c_maxattr
Maximum attribute identifier that the command is prepared to handle.
Definition: mngt.h:96