Contributors: 13
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Patrick McHardy |
634 |
74.59% |
7 |
26.92% |
| Florian Westphal |
111 |
13.06% |
7 |
26.92% |
| Laura Garcia Liebana |
23 |
2.71% |
1 |
3.85% |
| Fernando Fernandez Mancera |
23 |
2.71% |
1 |
3.85% |
| Ander Juaristi |
18 |
2.12% |
1 |
3.85% |
| Pablo Neira Ayuso |
13 |
1.53% |
2 |
7.69% |
| Dan Carpenter |
12 |
1.41% |
1 |
3.85% |
| Kazunori Miyazawa |
5 |
0.59% |
1 |
3.85% |
| Thadeu Lima de Souza Cascardo |
4 |
0.47% |
1 |
3.85% |
| Phil Sutter |
3 |
0.35% |
1 |
3.85% |
| Thomas Gleixner |
2 |
0.24% |
1 |
3.85% |
| Herbert Xu |
1 |
0.12% |
1 |
3.85% |
| Al Viro |
1 |
0.12% |
1 |
3.85% |
| Total |
850 |
|
26 |
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2008-2009 Patrick McHardy <kaber@trash.net>
*
* Development of this code funded by Astaro AG (http://www.astaro.com/)
*/
#include <linux/unaligned.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/netlink.h>
#include <linux/netfilter.h>
#include <linux/netfilter/nf_tables.h>
#include <net/netfilter/nf_tables_core.h>
#include <net/netfilter/nf_tables.h>
struct nft_byteorder {
u8 sreg;
u8 dreg;
enum nft_byteorder_ops op:8;
u8 size;
};
void nft_byteorder_eval(const struct nft_expr *expr,
struct nft_regs *regs,
const struct nft_pktinfo *pkt)
{
const struct nft_byteorder *priv = nft_expr_priv(expr);
const u32 *src = ®s->data[priv->sreg];
u32 *dst = ®s->data[priv->dreg];
switch (priv->size) {
case 8: {
u64 *dst64 = (void *)dst;
u64 src64;
switch (priv->op) {
case NFT_BYTEORDER_NTOH:
src64 = nft_reg_load64(src);
nft_reg_store64(dst64, be64_to_cpu((__force __be64)src64));
break;
case NFT_BYTEORDER_HTON:
src64 = (__force __u64)cpu_to_be64(nft_reg_load64(src));
nft_reg_store64(dst64, src64);
break;
}
break;
}
case 4:
switch (priv->op) {
case NFT_BYTEORDER_NTOH:
*dst = ntohl((__force __be32)*src);
break;
case NFT_BYTEORDER_HTON:
*dst = (__force __u32)htonl(*src);
break;
}
break;
case 2:
switch (priv->op) {
case NFT_BYTEORDER_NTOH:
nft_reg_store16(dst, ntohs(nft_reg_load_be16(src)));
break;
case NFT_BYTEORDER_HTON:
nft_reg_store_be16(dst, htons(nft_reg_load16(src)));
break;
}
break;
}
}
static const struct nla_policy nft_byteorder_policy[NFTA_BYTEORDER_MAX + 1] = {
[NFTA_BYTEORDER_SREG] = NLA_POLICY_MAX(NLA_BE32, NFT_REG32_MAX),
[NFTA_BYTEORDER_DREG] = NLA_POLICY_MAX(NLA_BE32, NFT_REG32_MAX),
[NFTA_BYTEORDER_OP] = NLA_POLICY_MAX(NLA_BE32, 255),
[NFTA_BYTEORDER_LEN] = NLA_POLICY_MAX(NLA_BE32, 255),
[NFTA_BYTEORDER_SIZE] = NLA_POLICY_MAX(NLA_BE32, 255),
};
static int nft_byteorder_init(const struct nft_ctx *ctx,
const struct nft_expr *expr,
const struct nlattr * const tb[])
{
struct nft_byteorder *priv = nft_expr_priv(expr);
u32 size, len;
int err;
if (tb[NFTA_BYTEORDER_SREG] == NULL ||
tb[NFTA_BYTEORDER_DREG] == NULL ||
tb[NFTA_BYTEORDER_LEN] == NULL ||
tb[NFTA_BYTEORDER_SIZE] == NULL ||
tb[NFTA_BYTEORDER_OP] == NULL)
return -EINVAL;
priv->op = ntohl(nla_get_be32(tb[NFTA_BYTEORDER_OP]));
switch (priv->op) {
case NFT_BYTEORDER_NTOH:
case NFT_BYTEORDER_HTON:
break;
default:
return -EINVAL;
}
err = nft_parse_u32_check(tb[NFTA_BYTEORDER_SIZE], U8_MAX, &size);
if (err < 0)
return err;
priv->size = size;
switch (priv->size) {
case 2:
case 4:
case 8:
break;
default:
return -EINVAL;
}
err = nft_parse_u32_check(tb[NFTA_BYTEORDER_LEN], U8_MAX, &len);
if (err < 0)
return err;
/* no longer support multi-reg conversions */
if (len != size)
return -EOPNOTSUPP;
err = nft_parse_register_load(ctx, tb[NFTA_BYTEORDER_SREG], &priv->sreg,
len);
if (err < 0)
return err;
err = nft_parse_register_store(ctx, tb[NFTA_BYTEORDER_DREG],
&priv->dreg, NULL, NFT_DATA_VALUE,
len);
if (err < 0)
return err;
if (nft_reg_overlap(priv->sreg, priv->dreg, len))
return -EINVAL;
return 0;
}
static int nft_byteorder_dump(struct sk_buff *skb,
const struct nft_expr *expr, bool reset)
{
const struct nft_byteorder *priv = nft_expr_priv(expr);
if (nft_dump_register(skb, NFTA_BYTEORDER_SREG, priv->sreg))
goto nla_put_failure;
if (nft_dump_register(skb, NFTA_BYTEORDER_DREG, priv->dreg))
goto nla_put_failure;
if (nla_put_be32(skb, NFTA_BYTEORDER_OP, htonl(priv->op)))
goto nla_put_failure;
if (nla_put_be32(skb, NFTA_BYTEORDER_SIZE, htonl(priv->size)))
goto nla_put_failure;
/* compatibility for old userspace which permitted size != len */
if (nla_put_be32(skb, NFTA_BYTEORDER_LEN, htonl(priv->size)))
goto nla_put_failure;
return 0;
nla_put_failure:
return -1;
}
static const struct nft_expr_ops nft_byteorder_ops = {
.type = &nft_byteorder_type,
.size = NFT_EXPR_SIZE(sizeof(struct nft_byteorder)),
.eval = nft_byteorder_eval,
.init = nft_byteorder_init,
.dump = nft_byteorder_dump,
};
struct nft_expr_type nft_byteorder_type __read_mostly = {
.name = "byteorder",
.ops = &nft_byteorder_ops,
.policy = nft_byteorder_policy,
.maxattr = NFTA_BYTEORDER_MAX,
.owner = THIS_MODULE,
};