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/*
* lib/route/cls/fw.c fw 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) 2003-2011 Thomas Graf <tgraf@suug.ch>
* Copyright (c) 2006 Petr Gotthard <petr.gotthard@siemens.com>
* Copyright (c) 2006 Siemens AG Oesterreich
*/
/**
* @ingroup cls
* @defgroup cls_fw Firewall Classifier
*
* @{
*/
#include <netlink-local.h>
#include <netlink-tc.h>
#include <netlink/netlink.h>
#include <netlink/route/tc-api.h>
#include <netlink/route/classifier.h>
#include <netlink/route/cls/fw.h>
/** @cond SKIP */
#define FW_ATTR_CLASSID 0x001
#define FW_ATTR_ACTION 0x002
#define FW_ATTR_POLICE 0x004
#define FW_ATTR_INDEV 0x008
#define FW_ATTR_MASK 0x010
/** @endcond */
static struct nla_policy fw_policy[TCA_FW_MAX+1] = {
[TCA_FW_CLASSID] = { .type = NLA_U32 },
[TCA_FW_INDEV] = { .type = NLA_STRING,
.maxlen = IFNAMSIZ },
[TCA_FW_MASK] = { .type = NLA_U32 },
};
static int fw_msg_parser(struct rtnl_tc *tc, void *data)
{
struct nlattr *tb[TCA_FW_MAX + 1];
struct rtnl_fw *f = data;
int err;
err = tca_parse(tb, TCA_FW_MAX, tc, fw_policy);
if (err < 0)
return err;
if (tb[TCA_FW_CLASSID]) {
f->cf_classid = nla_get_u32(tb[TCA_FW_CLASSID]);
f->cf_mask |= FW_ATTR_CLASSID;
}
if (tb[TCA_FW_ACT]) {
f->cf_act = nl_data_alloc_attr(tb[TCA_FW_ACT]);
if (!f->cf_act)
return -NLE_NOMEM;
f->cf_mask |= FW_ATTR_ACTION;
}
if (tb[TCA_FW_POLICE]) {
f->cf_police = nl_data_alloc_attr(tb[TCA_FW_POLICE]);
if (!f->cf_police)
return -NLE_NOMEM;
f->cf_mask |= FW_ATTR_POLICE;
}
if (tb[TCA_FW_INDEV]) {
nla_strlcpy(f->cf_indev, tb[TCA_FW_INDEV], IFNAMSIZ);
f->cf_mask |= FW_ATTR_INDEV;
}
if (tb[TCA_FW_MASK]) {
f->cf_fwmask = nla_get_u32(tb[TCA_FW_MASK]);
f->cf_mask |= FW_ATTR_MASK;
}
return 0;
}
static void fw_free_data(struct rtnl_tc *tc, void *data)
{
struct rtnl_fw *f = data;
nl_data_free(f->cf_act);
nl_data_free(f->cf_police);
}
static int fw_clone(void *_dst, void *_src)
{
struct rtnl_fw *dst = _dst, *src = _src;
if (src->cf_act && !(dst->cf_act = nl_data_clone(src->cf_act)))
return -NLE_NOMEM;
if (src->cf_police && !(dst->cf_police = nl_data_clone(src->cf_police)))
return -NLE_NOMEM;
return 0;
}
static void fw_dump_line(struct rtnl_tc *tc, void *data,
struct nl_dump_params *p)
{
struct rtnl_fw *f = data;
if (!f)
return;
if (f->cf_mask & FW_ATTR_CLASSID) {
char buf[32];
nl_dump(p, " target %s",
rtnl_tc_handle2str(f->cf_classid, buf, sizeof(buf)));
}
if (f->cf_mask & FW_ATTR_MASK)
nl_dump(p, " mask 0x%x", f->cf_fwmask);
}
static void fw_dump_details(struct rtnl_tc *tc, void *data,
struct nl_dump_params *p)
{
struct rtnl_fw *f = data;
if (f && f->cf_mask & FW_ATTR_INDEV)
nl_dump(p, "indev %s ", f->cf_indev);
}
static int fw_msg_fill(struct rtnl_tc *tc, void *data, struct nl_msg *msg)
{
struct rtnl_fw *f = data;
if (!f)
return 0;
if (f->cf_mask & FW_ATTR_CLASSID)
NLA_PUT_U32(msg, TCA_FW_CLASSID, f->cf_classid);
if (f->cf_mask & FW_ATTR_ACTION)
NLA_PUT_DATA(msg, TCA_FW_ACT, f->cf_act);
if (f->cf_mask & FW_ATTR_POLICE)
NLA_PUT_DATA(msg, TCA_FW_POLICE, f->cf_police);
if (f->cf_mask & FW_ATTR_INDEV)
NLA_PUT_STRING(msg, TCA_FW_INDEV, f->cf_indev);
if (f->cf_mask & FW_ATTR_MASK)
NLA_PUT_U32(msg, TCA_FW_MASK, f->cf_fwmask);
return 0;
nla_put_failure:
return -NLE_MSGSIZE;
}
/**
* @name Attribute Modifications
* @{
*/
int rtnl_fw_set_classid(struct rtnl_cls *cls, uint32_t classid)
{
struct rtnl_fw *f;
if (!(f = rtnl_tc_data(TC_CAST(cls))))
return -NLE_NOMEM;
f->cf_classid = classid;
f->cf_mask |= FW_ATTR_CLASSID;
return 0;
}
int rtnl_fw_set_mask(struct rtnl_cls *cls, uint32_t mask)
{
struct rtnl_fw *f;
if (!(f = rtnl_tc_data(TC_CAST(cls))))
return -NLE_NOMEM;
f->cf_fwmask = mask;
f->cf_mask |= FW_ATTR_MASK;
return 0;
}
/** @} */
static struct rtnl_tc_ops fw_ops = {
.to_kind = "fw",
.to_type = RTNL_TC_TYPE_CLS,
.to_size = sizeof(struct rtnl_fw),
.to_msg_parser = fw_msg_parser,
.to_msg_fill = fw_msg_fill,
.to_free_data = fw_free_data,
.to_clone = fw_clone,
.to_dump = {
[NL_DUMP_LINE] = fw_dump_line,
[NL_DUMP_DETAILS] = fw_dump_details,
},
};
static void __init fw_init(void)
{
rtnl_tc_register(&fw_ops);
}
static void __exit fw_exit(void)
{
rtnl_tc_unregister(&fw_ops);
}
/** @} */
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