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/*
* lib/route/cls/basic.c Basic Classifier
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation version 2.1
* of the License.
*
* Copyright (c) 2008-2010 Thomas Graf <tgraf@suug.ch>
*/
/**
* @ingroup cls
* @defgroup basic Basic Classifier
*
* @par Introduction
* The basic classifier is the simplest form of a classifier. It does
* not have any special classification capabilities, instead it can be
* used to classify exclusively based on extended matches or to
* create a "catch-all" filter.
*
* @{
*/
#include <netlink-local.h>
#include <netlink-tc.h>
#include <netlink/netlink.h>
#include <netlink/route/classifier.h>
#include <netlink/route/classifier-modules.h>
#include <netlink/route/cls/basic.h>
#include <netlink/route/cls/ematch.h>
struct rtnl_basic
{
uint32_t b_target;
struct rtnl_ematch_tree * b_ematch;
int b_mask;
};
/** @cond SKIP */
#define BASIC_ATTR_TARGET 0x001
#define BASIC_ATTR_EMATCH 0x002
/** @endcond */
static struct nla_policy basic_policy[TCA_BASIC_MAX+1] = {
[TCA_BASIC_CLASSID] = { .type = NLA_U32 },
[TCA_BASIC_EMATCHES] = { .type = NLA_NESTED },
};
static int basic_clone(struct rtnl_cls *_dst, struct rtnl_cls *_src)
{
return -NLE_OPNOTSUPP;
}
static void basic_free_data(struct rtnl_cls *cls)
{
struct rtnl_basic *basic = rtnl_cls_data(cls);
rtnl_ematch_tree_free(basic->b_ematch);
}
static int basic_msg_parser(struct rtnl_cls *cls)
{
struct nlattr *tb[TCA_BASIC_MAX + 1];
struct rtnl_basic *basic = rtnl_cls_data(cls);
int err;
err = tca_parse(tb, TCA_BASIC_MAX, (struct rtnl_tc *) cls, basic_policy);
if (err < 0)
return err;
if (tb[TCA_BASIC_CLASSID]) {
basic->b_target = nla_get_u32(tb[TCA_BASIC_CLASSID]);
basic->b_mask |= BASIC_ATTR_TARGET;
}
if (tb[TCA_BASIC_EMATCHES]) {
if ((err = rtnl_ematch_parse_attr(tb[TCA_BASIC_EMATCHES],
&basic->b_ematch)) < 0)
return err;
if (basic->b_ematch)
basic->b_mask |= BASIC_ATTR_EMATCH;
}
return 0;
}
static void basic_dump_line(struct rtnl_cls *cls, struct nl_dump_params *p)
{
struct rtnl_basic *b = rtnl_cls_data(cls);
char buf[32];
if (b->b_mask & BASIC_ATTR_EMATCH)
nl_dump(p, " ematch");
else
nl_dump(p, " match-all");
if (b->b_mask & BASIC_ATTR_TARGET)
nl_dump(p, " target %s",
rtnl_tc_handle2str(b->b_target, buf, sizeof(buf)));
}
static void basic_dump_details(struct rtnl_cls *cls, struct nl_dump_params *p)
{
struct rtnl_basic *b = rtnl_cls_data(cls);
if (b->b_mask & BASIC_ATTR_EMATCH) {
nl_dump_line(p, " ematch ");
rtnl_ematch_tree_dump(b->b_ematch, p);
} else
nl_dump(p, "no options.\n");
}
static int basic_get_opts(struct rtnl_cls *cls, struct nl_msg *msg)
{
struct rtnl_basic *b = rtnl_cls_data(cls);
if (!(b->b_mask & BASIC_ATTR_TARGET))
return -NLE_MISSING_ATTR;
NLA_PUT_U32(msg, TCA_BASIC_CLASSID, b->b_target);
return rtnl_ematch_fill_attr(msg, TCA_BASIC_EMATCHES, b->b_ematch);
nla_put_failure:
return -NLE_NOMEM;
}
/**
* @name Attribute Modifications
* @{
*/
void rtnl_basic_set_target(struct rtnl_cls *cls, uint32_t target)
{
struct rtnl_basic *b = rtnl_cls_data(cls);
b->b_target = target;
b->b_mask |= BASIC_ATTR_TARGET;
}
uint32_t rtnl_basic_get_target(struct rtnl_cls *cls)
{
struct rtnl_basic *b = rtnl_cls_data(cls);
return b->b_target;
}
void rtnl_basic_set_ematch(struct rtnl_cls *cls, struct rtnl_ematch_tree *tree)
{
struct rtnl_basic *b = rtnl_cls_data(cls);
if (b->b_ematch) {
rtnl_ematch_tree_free(b->b_ematch);
b->b_mask &= ~BASIC_ATTR_EMATCH;
}
b->b_ematch = tree;
if (tree)
b->b_mask |= BASIC_ATTR_EMATCH;
}
struct rtnl_ematch_tree *rtnl_basic_get_ematch(struct rtnl_cls *cls)
{
return ((struct rtnl_basic *) rtnl_cls_data(cls))->b_ematch;
}
/** @} */
static struct rtnl_cls_ops basic_ops = {
.co_kind = "basic",
.co_size = sizeof(struct rtnl_basic),
.co_msg_parser = basic_msg_parser,
.co_clone = basic_clone,
.co_free_data = basic_free_data,
.co_get_opts = basic_get_opts,
.co_dump = {
[NL_DUMP_LINE] = basic_dump_line,
[NL_DUMP_DETAILS] = basic_dump_details,
},
};
static void __init basic_init(void)
{
rtnl_cls_register(&basic_ops);
}
static void __exit basic_exit(void)
{
rtnl_cls_unregister(&basic_ops);
}
/** @} */
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