libnl  3.5.0
cls.c
1 /* SPDX-License-Identifier: LGPL-2.1-only */
2 /*
3  * src/lib/cls.c CLI Classifier Helpers
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) 2010-2011 Thomas Graf <tgraf@suug.ch>
11  */
12 
13 /**
14  * @ingroup cli
15  * @defgroup cli_cls Classifiers
16  * @{
17  */
18 
19 #include <netlink/cli/utils.h>
20 #include <netlink/cli/cls.h>
21 #include <netlink/route/cls/ematch.h>
22 
23 struct rtnl_cls *nl_cli_cls_alloc(void)
24 {
25  struct rtnl_cls *cls;
26 
27  if (!(cls = rtnl_cls_alloc()))
28  nl_cli_fatal(ENOMEM, "Unable to allocate classifier object");
29 
30  return cls;
31 }
32 
33 struct nl_cache *nl_cli_cls_alloc_cache(struct nl_sock *sock, int ifindex,
34  uint32_t parent)
35 {
36  struct nl_cache *cache;
37  int err;
38 
39  if ((err = rtnl_cls_alloc_cache(sock, ifindex, parent, &cache)) < 0)
40  nl_cli_fatal(err, "Unable to allocate classifier cache: %s",
41  nl_geterror(err));
42 
43  return cache;
44 }
45 
46 void nl_cli_cls_parse_proto(struct rtnl_cls *cls, char *arg)
47 {
48  int proto;
49 
50  if ((proto = nl_str2ether_proto(arg)) < 0)
51  nl_cli_fatal(proto, "Unknown protocol \"%s\".", arg);
52 
53  rtnl_cls_set_protocol(cls, proto);
54 }
55 
56 struct rtnl_ematch_tree *nl_cli_cls_parse_ematch(struct rtnl_cls *cls, char *arg)
57 {
58  struct rtnl_ematch_tree *tree;
59  char *errstr = NULL;
60  int err;
61 
62  if ((err = rtnl_ematch_parse_expr(arg, &errstr, &tree)) < 0)
63  nl_cli_fatal(err, "Unable to parse ematch expression: %s",
64  errstr);
65 
66  if (errstr)
67  free(errstr);
68 
69  return tree;
70 }
71 
72 /** @} */
int rtnl_cls_alloc_cache(struct nl_sock *sk, int ifindex, uint32_t parent, struct nl_cache **result)
Allocate a cache and fill it with all configured classifiers.
Definition: cls.c:328
void nl_cli_fatal(int err, const char *fmt,...)
Print error message and quit application.
Definition: utils.c:78