1 /*
2 * src/cls-utils.c Classifier Helpers
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License as
6 * published by the Free Software Foundation version 2 of the License.
7 *
8 * Copyright (c) 2008-2009 Thomas Graf <tgraf@suug.ch>
9 */
10
11 #include "utils.h"
12
nlt_alloc_cls(void)13 struct rtnl_cls *nlt_alloc_cls(void)
14 {
15 struct rtnl_cls *cls;
16
17 cls = rtnl_cls_alloc();
18 if (!cls)
19 fatal(ENOMEM, "Unable to allocate classifier object");
20
21 return cls;
22 }
23
parse_dev(struct rtnl_cls * cls,struct nl_cache * link_cache,char * arg)24 void parse_dev(struct rtnl_cls *cls, struct nl_cache *link_cache, char *arg)
25 {
26 int ival;
27
28 if (!(ival = rtnl_link_name2i(link_cache, arg)))
29 fatal(ENOENT, "Link \"%s\" does not exist", arg);
30
31 rtnl_cls_set_ifindex(cls, ival);
32 }
33
parse_prio(struct rtnl_cls * cls,char * arg)34 void parse_prio(struct rtnl_cls *cls, char *arg)
35 {
36 uint32_t prio = parse_u32(arg);
37 rtnl_cls_set_prio(cls, prio);
38 }
39
parse_parent(struct rtnl_cls * cls,char * arg)40 void parse_parent(struct rtnl_cls *cls, char *arg)
41 {
42 uint32_t parent;
43 int err;
44
45 if ((err = rtnl_tc_str2handle(arg, &parent)) < 0)
46 fatal(err, "Unable to parse handle \"%s\": %s",
47 arg, nl_geterror(err));
48
49 rtnl_cls_set_parent(cls, parent);
50 }
51
parse_handle(struct rtnl_cls * cls,char * arg)52 void parse_handle(struct rtnl_cls *cls, char *arg)
53 {
54 uint32_t handle;
55 int err;
56
57 if ((err = rtnl_tc_str2handle(arg, &handle)) < 0)
58 fatal(err, "Unable to parse handle \"%s\": %s",
59 arg, nl_geterror(err));
60
61 rtnl_cls_set_handle(cls, handle);
62 }
63
parse_proto(struct rtnl_cls * cls,char * arg)64 void parse_proto(struct rtnl_cls *cls, char *arg)
65 {
66 int proto = nl_str2ether_proto(arg);
67 if (proto < 0)
68 fatal(proto, "Unable to parse protocol \"%s\": %s",
69 arg, nl_geterror(proto));
70 rtnl_cls_set_protocol(cls, proto);
71 }
72
73 static NL_LIST_HEAD(cls_modules);
74
lookup_cls_mod(struct rtnl_cls_ops * ops)75 struct cls_module *lookup_cls_mod(struct rtnl_cls_ops *ops)
76 {
77 struct cls_module *mod;
78
79 nl_list_for_each_entry(mod, &cls_modules, list) {
80 if (mod->ops == ops)
81 return mod;
82 }
83
84 return NULL;
85 }
86
register_cls_module(struct cls_module * mod)87 void register_cls_module(struct cls_module *mod)
88 {
89 struct rtnl_cls_ops *ops;
90
91 if (!(ops = __rtnl_cls_lookup_ops(mod->name)))
92 fatal(ENOENT, "Could not locate classifier module \"%s\"",
93 mod->name);
94
95 if (lookup_cls_mod(ops) != NULL)
96 fatal(EEXIST, "Duplicate classifier module registration.");
97
98 mod->ops = ops;
99 nl_list_add_tail(&mod->list, &cls_modules);
100 }
101
unregister_cls_module(struct cls_module * mod)102 void unregister_cls_module(struct cls_module *mod)
103 {
104 nl_list_del(&mod->list);
105 }
106