static int nft_log_dump(struct sk_buff *skb, const struct nft_expr *expr)
{
const struct nft_log *priv = nft_expr_priv(expr);
const struct nf_loginfo *li = &priv->loginfo;
if (priv->prefix != nft_log_null_prefix)
if (nla_put_string(skb, NFTA_LOG_PREFIX, priv->prefix))
goto nla_put_failure;
switch (li->type) {
case NF_LOG_TYPE_LOG:
if (nla_put_be32(skb, NFTA_LOG_LEVEL, htonl(li->u.log.level)))
goto nla_put_failure;
if (li->u.log.logflags) {
if (nla_put_be32(skb, NFTA_LOG_FLAGS,
htonl(li->u.log.logflags)))
goto nla_put_failure;
}
break;
case NF_LOG_TYPE_ULOG:
if (nla_put_be16(skb, NFTA_LOG_GROUP, htons(li->u.ulog.group)))
goto nla_put_failure;
if (li->u.ulog.flags & NF_LOG_F_COPY_LEN) {
if (nla_put_be32(skb, NFTA_LOG_SNAPLEN,
htonl(li->u.ulog.copy_len)))
goto nla_put_failure;
}
if (li->u.ulog.qthreshold) {
if (nla_put_be16(skb, NFTA_LOG_QTHRESHOLD,
htons(li->u.ulog.qthreshold)))
goto nla_put_failure;
}
break;
}
return 0;
nla_put_failure:
return -1;
}
static void nft_nat_eval(const struct nft_expr *expr,
struct nft_regs *regs,
const struct nft_pktinfo *pkt)
{
const struct nft_nat *priv = nft_expr_priv(expr);
enum ip_conntrack_info ctinfo;
struct nf_conn *ct = nf_ct_get(pkt->skb, &ctinfo);
struct nf_nat_range range;
memset(&range, 0, sizeof(range));
if (priv->sreg_addr_min) {
if (priv->family == AF_INET) {
range.min_addr.ip = (__force __be32)
regs->data[priv->sreg_addr_min];
range.max_addr.ip = (__force __be32)
regs->data[priv->sreg_addr_max];
} else {
memcpy(range.min_addr.ip6,
®s->data[priv->sreg_addr_min],
sizeof(range.min_addr.ip6));
memcpy(range.max_addr.ip6,
®s->data[priv->sreg_addr_max],
sizeof(range.max_addr.ip6));
}
range.flags |= NF_NAT_RANGE_MAP_IPS;
}
if (priv->sreg_proto_min) {
range.min_proto.all =
*(__be16 *)®s->data[priv->sreg_proto_min];
range.max_proto.all =
*(__be16 *)®s->data[priv->sreg_proto_max];
range.flags |= NF_NAT_RANGE_PROTO_SPECIFIED;
}
range.flags |= priv->flags;
regs->verdict.code = nf_nat_setup_info(ct, &range, priv->type);
}
static int nft_ct_set_init(const struct nft_ctx *ctx,
const struct nft_expr *expr,
const struct nlattr * const tb[])
{
struct nft_ct *priv = nft_expr_priv(expr);
unsigned int len;
int err;
priv->key = ntohl(nla_get_be32(tb[NFTA_CT_KEY]));
switch (priv->key) {
#ifdef CONFIG_NF_CONNTRACK_MARK
case NFT_CT_MARK:
len = FIELD_SIZEOF(struct nf_conn, mark);
break;
#endif
#ifdef CONFIG_NF_CONNTRACK_LABELS
case NFT_CT_LABELS:
if (tb[NFTA_CT_DIRECTION])
return -EINVAL;
len = NF_CT_LABELS_MAX_SIZE;
err = nf_connlabels_get(ctx->net, (len * BITS_PER_BYTE) - 1);
if (err)
return err;
break;
#endif
default:
return -EOPNOTSUPP;
}
priv->sreg = nft_parse_register(tb[NFTA_CT_SREG]);
err = nft_validate_register_load(priv->sreg, len);
if (err < 0)
return err;
err = nft_ct_l3proto_try_module_get(ctx->afi->family);
if (err < 0)
return err;
return 0;
}
int nft_redir_dump(struct sk_buff *skb, const struct nft_expr *expr)
{
const struct nft_redir *priv = nft_expr_priv(expr);
if (priv->sreg_proto_min) {
if (nla_put_be32(skb, NFTA_REDIR_REG_PROTO_MIN,
htonl(priv->sreg_proto_min)))
goto nla_put_failure;
if (nla_put_be32(skb, NFTA_REDIR_REG_PROTO_MAX,
htonl(priv->sreg_proto_max)))
goto nla_put_failure;
}
if (priv->flags != 0 &&
nla_put_be32(skb, NFTA_REDIR_FLAGS, htonl(priv->flags)))
goto nla_put_failure;
return 0;
nla_put_failure:
return -1;
}
int nft_redir_init(const struct nft_ctx *ctx,
const struct nft_expr *expr,
const struct nlattr * const tb[])
{
struct nft_redir *priv = nft_expr_priv(expr);
int err;
err = nft_chain_validate_dependency(ctx->chain, NFT_CHAIN_T_NAT);
if (err < 0)
return err;
if (tb[NFTA_REDIR_REG_PROTO_MIN]) {
priv->sreg_proto_min =
ntohl(nla_get_be32(tb[NFTA_REDIR_REG_PROTO_MIN]));
err = nft_validate_input_register(priv->sreg_proto_min);
if (err < 0)
return err;
if (tb[NFTA_REDIR_REG_PROTO_MAX]) {
priv->sreg_proto_max =
ntohl(nla_get_be32(tb[NFTA_REDIR_REG_PROTO_MAX]));
err = nft_validate_input_register(priv->sreg_proto_max);
if (err < 0)
return err;
} else {
priv->sreg_proto_max = priv->sreg_proto_min;
}
}
if (tb[NFTA_REDIR_FLAGS]) {
priv->flags = ntohl(nla_get_be32(tb[NFTA_REDIR_FLAGS]));
if (priv->flags & ~NF_NAT_RANGE_MASK)
return -EINVAL;
}
return 0;
}
static int nft_rt_validate(const struct nft_ctx *ctx, const struct nft_expr *expr,
const struct nft_data **data)
{
const struct nft_rt *priv = nft_expr_priv(expr);
unsigned int hooks;
switch (priv->key) {
case NFT_RT_NEXTHOP4:
case NFT_RT_NEXTHOP6:
case NFT_RT_CLASSID:
return 0;
case NFT_RT_TCPMSS:
hooks = (1 << NF_INET_FORWARD) |
(1 << NF_INET_LOCAL_OUT) |
(1 << NF_INET_POST_ROUTING);
break;
default:
return -EINVAL;
}
return nft_chain_validate_hooks(ctx->chain, hooks);
}
static void nft_nat_eval(const struct nft_expr *expr,
struct nft_data data[NFT_REG_MAX + 1],
const struct nft_pktinfo *pkt)
{
const struct nft_nat *priv = nft_expr_priv(expr);
enum ip_conntrack_info ctinfo;
struct nf_conn *ct = nf_ct_get(pkt->skb, &ctinfo);
struct nf_nat_range range;
memset(&range, 0, sizeof(range));
if (priv->sreg_addr_min) {
if (priv->family == AF_INET) {
range.min_addr.ip = (__force __be32)
data[priv->sreg_addr_min].data[0];
range.max_addr.ip = (__force __be32)
data[priv->sreg_addr_max].data[0];
} else {
memcpy(range.min_addr.ip6,
data[priv->sreg_addr_min].data,
sizeof(struct nft_data));
memcpy(range.max_addr.ip6,
data[priv->sreg_addr_max].data,
sizeof(struct nft_data));
}
range.flags |= NF_NAT_RANGE_MAP_IPS;
}
if (priv->sreg_proto_min) {
range.min_proto.all = (__force __be16)
data[priv->sreg_proto_min].data[0];
range.max_proto.all = (__force __be16)
data[priv->sreg_proto_max].data[0];
range.flags |= NF_NAT_RANGE_PROTO_SPECIFIED;
}
data[NFT_REG_VERDICT].verdict =
nf_nat_setup_info(ct, &range, priv->type);
}
static void nft_meta_set_eval(const struct nft_expr *expr,
struct nft_data data[NFT_REG_MAX + 1],
const struct nft_pktinfo *pkt)
{
const struct nft_meta *meta = nft_expr_priv(expr);
struct sk_buff *skb = pkt->skb;
u32 value = data[meta->sreg].data[0];
switch (meta->key) {
case NFT_META_MARK:
skb->mark = value;
break;
case NFT_META_PRIORITY:
skb->priority = value;
break;
case NFT_META_NFTRACE:
skb->nf_trace = 1;
break;
default:
WARN_ON(1);
}
}
static int nft_ng_inc_init(const struct nft_ctx *ctx,
const struct nft_expr *expr,
const struct nlattr * const tb[])
{
struct nft_ng_inc *priv = nft_expr_priv(expr);
if (tb[NFTA_NG_OFFSET])
priv->offset = ntohl(nla_get_be32(tb[NFTA_NG_OFFSET]));
priv->modulus = ntohl(nla_get_be32(tb[NFTA_NG_MODULUS]));
if (priv->modulus == 0)
return -ERANGE;
if (priv->offset + priv->modulus - 1 < priv->offset)
return -EOVERFLOW;
priv->dreg = nft_parse_register(tb[NFTA_NG_DREG]);
atomic_set(&priv->counter, priv->modulus - 1);
return nft_validate_register_store(ctx, priv->dreg, NULL,
NFT_DATA_VALUE, sizeof(u32));
}
static int nft_queue_sreg_init(const struct nft_ctx *ctx,
const struct nft_expr *expr,
const struct nlattr * const tb[])
{
struct nft_queue *priv = nft_expr_priv(expr);
int err;
priv->sreg_qnum = nft_parse_register(tb[NFTA_QUEUE_SREG_QNUM]);
err = nft_validate_register_load(priv->sreg_qnum, sizeof(u32));
if (err < 0)
return err;
if (tb[NFTA_QUEUE_FLAGS]) {
priv->flags = ntohs(nla_get_be16(tb[NFTA_QUEUE_FLAGS]));
if (priv->flags & ~NFT_QUEUE_FLAG_MASK)
return -EINVAL;
if (priv->flags & NFT_QUEUE_FLAG_CPU_FANOUT)
return -EOPNOTSUPP;
}
return 0;
}
static void nft_meta_set_eval(const struct nft_expr *expr,
struct nft_regs *regs,
const struct nft_pktinfo *pkt)
{
const struct nft_meta *meta = nft_expr_priv(expr);
struct sk_buff *skb = pkt->skb;
u32 *sreg = ®s->data[meta->sreg];
u32 value = *sreg;
u8 value8;
switch (meta->key) {
case NFT_META_MARK:
skb->mark = value;
break;
case NFT_META_PRIORITY:
skb->priority = value;
break;
case NFT_META_PKTTYPE:
value8 = nft_reg_load8(sreg);
if (skb->pkt_type != value8 &&
skb_pkt_type_ok(value8) &&
skb_pkt_type_ok(skb->pkt_type))
skb->pkt_type = value8;
break;
case NFT_META_NFTRACE:
value8 = nft_reg_load8(sreg);
skb->nf_trace = !!value8;
break;
#ifdef CONFIG_NETWORK_SECMARK
case NFT_META_SECMARK:
skb->secmark = value;
break;
#endif
default:
WARN_ON(1);
}
}
static void nft_redir_ipv6_eval(const struct nft_expr *expr,
struct nft_data data[NFT_REG_MAX + 1],
const struct nft_pktinfo *pkt)
{
struct nft_redir *priv = nft_expr_priv(expr);
struct nf_nat_range range;
unsigned int verdict;
memset(&range, 0, sizeof(range));
if (priv->sreg_proto_min) {
range.min_proto.all =
*(__be16 *)&data[priv->sreg_proto_min].data[0];
range.max_proto.all =
*(__be16 *)&data[priv->sreg_proto_max].data[0];
range.flags |= NF_NAT_RANGE_PROTO_SPECIFIED;
}
range.flags |= priv->flags;
verdict = nf_nat_redirect_ipv6(pkt->skb, &range, pkt->ops->hooknum);
data[NFT_REG_VERDICT].verdict = verdict;
}
static void nft_redir_ipv4_eval(const struct nft_expr *expr,
struct nft_data data[NFT_REG_MAX + 1],
const struct nft_pktinfo *pkt)
{
struct nft_redir *priv = nft_expr_priv(expr);
struct nf_nat_ipv4_multi_range_compat mr;
unsigned int verdict;
memset(&mr, 0, sizeof(mr));
if (priv->sreg_proto_min) {
mr.range[0].min.all =
*(__be16 *)&data[priv->sreg_proto_min].data[0];
mr.range[0].max.all =
*(__be16 *)&data[priv->sreg_proto_max].data[0];
mr.range[0].flags |= NF_NAT_RANGE_PROTO_SPECIFIED;
}
mr.range[0].flags |= priv->flags;
verdict = nf_nat_redirect_ipv4(pkt->skb, &mr, pkt->ops->hooknum);
data[NFT_REG_VERDICT].verdict = verdict;
}
static void nft_lookup_eval(const struct nft_expr *expr,
struct nft_regs *regs,
const struct nft_pktinfo *pkt)
{
const struct nft_lookup *priv = nft_expr_priv(expr);
const struct nft_set *set = priv->set;
const struct nft_set_ext *ext;
bool found;
found = set->ops->lookup(pkt->net, set, ®s->data[priv->sreg], &ext) ^
priv->invert;
if (!found) {
regs->verdict.code = NFT_BREAK;
return;
}
if (set->flags & NFT_SET_MAP)
nft_data_copy(®s->data[priv->dreg],
nft_set_ext_data(ext), set->dlen);
}
static int nft_meta_init(const struct nft_expr *expr, struct nlattr *tb[])
{
struct nft_meta *meta = nft_expr_priv(expr);
if (tb[NFTA_META_KEY] == NULL)
return -EINVAL;
meta->key = ntohl(nla_get_be32(tb[NFTA_META_KEY]));
switch (meta->key) {
case NFT_META_MARK:
case NFT_META_PRIORITY:
case NFT_META_NFTRACE:
#ifdef CONFIG_NETWORK_SECMARK
case NFT_META_SECMARK:
#endif
break;
default:
return -EINVAL;
}
return 0;
}
static int
nft_target_init(const struct nft_ctx *ctx, const struct nft_expr *expr,
const struct nlattr * const tb[])
{
void *info = nft_expr_priv(expr);
struct xt_target *target = expr->ops->data;
struct xt_tgchk_param par;
size_t size = XT_ALIGN(nla_len(tb[NFTA_TARGET_INFO]));
u8 proto = 0;
bool inv = false;
union nft_entry e = {};
int ret;
target_compat_from_user(target, nla_data(tb[NFTA_TARGET_INFO]), info);
if (ctx->nla[NFTA_RULE_COMPAT]) {
ret = nft_parse_compat(ctx->nla[NFTA_RULE_COMPAT], &proto, &inv);
if (ret < 0)
goto err;
}
nft_target_set_tgchk_param(&par, ctx, target, info, &e, proto, inv);
ret = xt_check_target(&par, size, proto, inv);
if (ret < 0)
goto err;
/* The standard target cannot be used */
if (target->target == NULL) {
ret = -EINVAL;
goto err;
}
return 0;
err:
module_put(target->me);
return ret;
}
static int nft_lookup_validate(const struct nft_ctx *ctx,
const struct nft_expr *expr,
const struct nft_data **d)
{
const struct nft_lookup *priv = nft_expr_priv(expr);
struct nft_set_iter iter;
if (!(priv->set->flags & NFT_SET_MAP) ||
priv->set->dtype != NFT_DATA_VERDICT)
return 0;
iter.genmask = nft_genmask_next(ctx->net);
iter.skip = 0;
iter.count = 0;
iter.err = 0;
iter.fn = nft_lookup_validate_setelem;
priv->set->ops->walk(ctx, priv->set, &iter);
if (iter.err < 0)
return iter.err;
return 0;
}
int nft_reject_init(const struct nft_ctx *ctx,
const struct nft_expr *expr,
const struct nlattr * const tb[])
{
struct nft_reject *priv = nft_expr_priv(expr);
if (tb[NFTA_REJECT_TYPE] == NULL)
return -EINVAL;
priv->type = ntohl(nla_get_be32(tb[NFTA_REJECT_TYPE]));
switch (priv->type) {
case NFT_REJECT_ICMP_UNREACH:
if (tb[NFTA_REJECT_ICMP_CODE] == NULL)
return -EINVAL;
priv->icmp_code = nla_get_u8(tb[NFTA_REJECT_ICMP_CODE]);
case NFT_REJECT_TCP_RST:
break;
default:
return -EINVAL;
}
return 0;
}
static int nft_reject_bridge_dump(struct sk_buff *skb,
const struct nft_expr *expr)
{
const struct nft_reject *priv = nft_expr_priv(expr);
if (nla_put_be32(skb, NFTA_REJECT_TYPE, htonl(priv->type)))
goto nla_put_failure;
switch (priv->type) {
case NFT_REJECT_ICMP_UNREACH:
case NFT_REJECT_ICMPX_UNREACH:
if (nla_put_u8(skb, NFTA_REJECT_ICMP_CODE, priv->icmp_code))
goto nla_put_failure;
break;
default:
break;
}
return 0;
nla_put_failure:
return -1;
}
static int nft_socket_init(const struct nft_ctx *ctx,
const struct nft_expr *expr,
const struct nlattr * const tb[])
{
struct nft_socket *priv = nft_expr_priv(expr);
unsigned int len;
if (!tb[NFTA_SOCKET_DREG] || !tb[NFTA_SOCKET_KEY])
return -EINVAL;
switch(ctx->family) {
case NFPROTO_IPV4:
#if IS_ENABLED(CONFIG_NF_TABLES_IPV6)
case NFPROTO_IPV6:
#endif
case NFPROTO_INET:
break;
default:
return -EOPNOTSUPP;
}
priv->key = ntohl(nla_get_u32(tb[NFTA_SOCKET_KEY]));
switch(priv->key) {
case NFT_SOCKET_TRANSPARENT:
len = sizeof(u8);
break;
case NFT_SOCKET_MARK:
len = sizeof(u32);
break;
default:
return -EOPNOTSUPP;
}
priv->dreg = nft_parse_register(tb[NFTA_SOCKET_DREG]);
return nft_validate_register_store(ctx, priv->dreg, NULL,
NFT_DATA_VALUE, len);
}
static int nft_meta_set_init(const struct nft_ctx *ctx,
const struct nft_expr *expr,
const struct nlattr * const tb[])
{
struct nft_meta *priv = nft_expr_priv(expr);
unsigned int len;
int err;
priv->key = ntohl(nla_get_be32(tb[NFTA_META_KEY]));
switch (priv->key) {
case NFT_META_MARK:
case NFT_META_PRIORITY:
#ifdef CONFIG_NETWORK_SECMARK
case NFT_META_SECMARK:
#endif
len = sizeof(u32);
break;
case NFT_META_NFTRACE:
len = sizeof(u8);
break;
case NFT_META_PKTTYPE:
len = sizeof(u8);
break;
default:
return -EOPNOTSUPP;
}
priv->sreg = nft_parse_register(tb[NFTA_META_SREG]);
err = nft_validate_register_load(priv->sreg, len);
if (err < 0)
return err;
if (priv->key == NFT_META_NFTRACE)
static_branch_inc(&nft_trace_enabled);
return 0;
}
static void nft_ct_set_eval(const struct nft_expr *expr,
struct nft_regs *regs,
const struct nft_pktinfo *pkt)
{
const struct nft_ct *priv = nft_expr_priv(expr);
struct sk_buff *skb = pkt->skb;
#ifdef CONFIG_NF_CONNTRACK_MARK
u32 value = regs->data[priv->sreg];
#endif
enum ip_conntrack_info ctinfo;
struct nf_conn *ct;
ct = nf_ct_get(skb, &ctinfo);
if (ct == NULL)
return;
switch (priv->key) {
#ifdef CONFIG_NF_CONNTRACK_MARK
case NFT_CT_MARK:
if (ct->mark != value) {
ct->mark = value;
nf_conntrack_event_cache(IPCT_MARK, ct);
}
break;
#endif
#ifdef CONFIG_NF_CONNTRACK_LABELS
case NFT_CT_LABELS:
nf_connlabels_replace(ct,
®s->data[priv->sreg],
®s->data[priv->sreg],
NF_CT_LABELS_MAX_SIZE / sizeof(u32));
break;
#endif
default:
break;
}
}
static void nft_cmp_eval(const struct nft_expr *expr,
struct nft_regs *regs,
const struct nft_pktinfo *pkt)
{
const struct nft_cmp_expr *priv = nft_expr_priv(expr);
int d;
d = memcmp(®s->data[priv->sreg], &priv->data, priv->len);
switch (priv->op) {
case NFT_CMP_EQ:
if (d != 0)
goto mismatch;
break;
case NFT_CMP_NEQ:
if (d == 0)
goto mismatch;
break;
case NFT_CMP_LT:
if (d == 0)
goto mismatch;
case NFT_CMP_LTE:
if (d > 0)
goto mismatch;
break;
case NFT_CMP_GT:
if (d == 0)
goto mismatch;
case NFT_CMP_GTE:
if (d < 0)
goto mismatch;
break;
}
return;
mismatch:
regs->verdict.code = NFT_BREAK;
}
static int nft_nat_dump(struct sk_buff *skb, const struct nft_expr *expr)
{
const struct nft_nat *priv = nft_expr_priv(expr);
switch (priv->type) {
case NF_NAT_MANIP_SRC:
if (nla_put_be32(skb, NFTA_NAT_TYPE, htonl(NFT_NAT_SNAT)))
goto nla_put_failure;
break;
case NF_NAT_MANIP_DST:
if (nla_put_be32(skb, NFTA_NAT_TYPE, htonl(NFT_NAT_DNAT)))
goto nla_put_failure;
break;
}
if (nla_put_be32(skb, NFTA_NAT_FAMILY, htonl(priv->family)))
goto nla_put_failure;
if (nla_put_be32(skb,
NFTA_NAT_REG_ADDR_MIN, htonl(priv->sreg_addr_min)))
goto nla_put_failure;
if (nla_put_be32(skb,
NFTA_NAT_REG_ADDR_MAX, htonl(priv->sreg_addr_max)))
goto nla_put_failure;
if (priv->sreg_proto_min) {
if (nla_put_be32(skb, NFTA_NAT_REG_PROTO_MIN,
htonl(priv->sreg_proto_min)))
goto nla_put_failure;
if (nla_put_be32(skb, NFTA_NAT_REG_PROTO_MAX,
htonl(priv->sreg_proto_max)))
goto nla_put_failure;
}
return 0;
nla_put_failure:
return -1;
}
static int
nft_match_init(const struct nft_ctx *ctx, const struct nft_expr *expr,
const struct nlattr * const tb[])
{
void *info = nft_expr_priv(expr);
struct xt_match *match = expr->ops->data;
struct xt_mtchk_param par;
size_t size = XT_ALIGN(nla_len(tb[NFTA_MATCH_INFO]));
u16 proto = 0;
bool inv = false;
union nft_entry e = {};
int ret;
ret = nft_compat_chain_validate_dependency(match->table, ctx->chain);
if (ret < 0)
goto err;
match_compat_from_user(match, nla_data(tb[NFTA_MATCH_INFO]), info);
if (ctx->nla[NFTA_RULE_COMPAT]) {
ret = nft_parse_compat(ctx->nla[NFTA_RULE_COMPAT], &proto, &inv);
if (ret < 0)
goto err;
}
nft_match_set_mtchk_param(&par, ctx, match, info, &e, proto, inv);
ret = xt_check_match(&par, size, proto, inv);
if (ret < 0)
goto err;
return 0;
err:
module_put(match->me);
return ret;
}
int nft_meta_set_init(const struct nft_ctx *ctx,
const struct nft_expr *expr,
const struct nlattr * const tb[])
{
struct nft_meta *priv = nft_expr_priv(expr);
int err;
priv->key = ntohl(nla_get_be32(tb[NFTA_META_KEY]));
switch (priv->key) {
case NFT_META_MARK:
case NFT_META_PRIORITY:
case NFT_META_NFTRACE:
break;
default:
return -EOPNOTSUPP;
}
priv->sreg = ntohl(nla_get_be32(tb[NFTA_META_SREG]));
err = nft_validate_input_register(priv->sreg);
if (err < 0)
return err;
return 0;
}
static int nft_bitwise_dump(struct sk_buff *skb, const struct nft_expr *expr)
{
const struct nft_bitwise *priv = nft_expr_priv(expr);
if (nft_dump_register(skb, NFTA_BITWISE_SREG, priv->sreg))
goto nla_put_failure;
if (nft_dump_register(skb, NFTA_BITWISE_DREG, priv->dreg))
goto nla_put_failure;
if (nla_put_be32(skb, NFTA_BITWISE_LEN, htonl(priv->len)))
goto nla_put_failure;
if (nft_data_dump(skb, NFTA_BITWISE_MASK, &priv->mask,
NFT_DATA_VALUE, priv->len) < 0)
goto nla_put_failure;
if (nft_data_dump(skb, NFTA_BITWISE_XOR, &priv->xor,
NFT_DATA_VALUE, priv->len) < 0)
goto nla_put_failure;
return 0;
nla_put_failure:
return -1;
}
static int nft_limit_pkts_dump(struct sk_buff *skb, const struct nft_expr *expr)
{
const struct nft_limit_pkts *priv = nft_expr_priv(expr);
return nft_limit_dump(skb, &priv->limit, NFT_LIMIT_PKTS);
}
static int nft_nat_init(const struct nft_ctx *ctx, const struct nft_expr *expr,
const struct nlattr * const tb[])
{
struct nft_nat *priv = nft_expr_priv(expr);
unsigned int alen, plen;
u32 family;
int err;
if (tb[NFTA_NAT_TYPE] == NULL ||
(tb[NFTA_NAT_REG_ADDR_MIN] == NULL &&
tb[NFTA_NAT_REG_PROTO_MIN] == NULL))
return -EINVAL;
switch (ntohl(nla_get_be32(tb[NFTA_NAT_TYPE]))) {
case NFT_NAT_SNAT:
priv->type = NF_NAT_MANIP_SRC;
break;
case NFT_NAT_DNAT:
priv->type = NF_NAT_MANIP_DST;
break;
default:
return -EINVAL;
}
err = nft_nat_validate(ctx, expr, NULL);
if (err < 0)
return err;
if (tb[NFTA_NAT_FAMILY] == NULL)
return -EINVAL;
family = ntohl(nla_get_be32(tb[NFTA_NAT_FAMILY]));
if (family != ctx->afi->family)
return -EOPNOTSUPP;
switch (family) {
case NFPROTO_IPV4:
alen = FIELD_SIZEOF(struct nf_nat_range, min_addr.ip);
break;
case NFPROTO_IPV6:
alen = FIELD_SIZEOF(struct nf_nat_range, min_addr.ip6);
break;
default:
return -EAFNOSUPPORT;
}
priv->family = family;
if (tb[NFTA_NAT_REG_ADDR_MIN]) {
priv->sreg_addr_min =
nft_parse_register(tb[NFTA_NAT_REG_ADDR_MIN]);
err = nft_validate_register_load(priv->sreg_addr_min, alen);
if (err < 0)
return err;
if (tb[NFTA_NAT_REG_ADDR_MAX]) {
priv->sreg_addr_max =
nft_parse_register(tb[NFTA_NAT_REG_ADDR_MAX]);
err = nft_validate_register_load(priv->sreg_addr_max,
alen);
if (err < 0)
return err;
} else {
priv->sreg_addr_max = priv->sreg_addr_min;
}
}
plen = FIELD_SIZEOF(struct nf_nat_range, min_addr.all);
if (tb[NFTA_NAT_REG_PROTO_MIN]) {
priv->sreg_proto_min =
nft_parse_register(tb[NFTA_NAT_REG_PROTO_MIN]);
err = nft_validate_register_load(priv->sreg_proto_min, plen);
if (err < 0)
return err;
if (tb[NFTA_NAT_REG_PROTO_MAX]) {
priv->sreg_proto_max =
nft_parse_register(tb[NFTA_NAT_REG_PROTO_MAX]);
err = nft_validate_register_load(priv->sreg_proto_max,
plen);
if (err < 0)
return err;
} else {
priv->sreg_proto_max = priv->sreg_proto_min;
}
}
if (tb[NFTA_NAT_FLAGS]) {
priv->flags = ntohl(nla_get_be32(tb[NFTA_NAT_FLAGS]));
if (priv->flags & ~NF_NAT_RANGE_MASK)
return -EINVAL;
}
return 0;
}
static void nft_reject_bridge_eval(const struct nft_expr *expr,
struct nft_regs *regs,
const struct nft_pktinfo *pkt)
{
struct nft_reject *priv = nft_expr_priv(expr);
const unsigned char *dest = eth_hdr(pkt->skb)->h_dest;
if (is_broadcast_ether_addr(dest) ||
is_multicast_ether_addr(dest))
goto out;
switch (eth_hdr(pkt->skb)->h_proto) {
case htons(ETH_P_IP):
switch (priv->type) {
case NFT_REJECT_ICMP_UNREACH:
nft_reject_br_send_v4_unreach(nft_net(pkt), pkt->skb,
nft_in(pkt),
nft_hook(pkt),
priv->icmp_code);
break;
case NFT_REJECT_TCP_RST:
nft_reject_br_send_v4_tcp_reset(nft_net(pkt), pkt->skb,
nft_in(pkt),
nft_hook(pkt));
break;
case NFT_REJECT_ICMPX_UNREACH:
nft_reject_br_send_v4_unreach(nft_net(pkt), pkt->skb,
nft_in(pkt),
nft_hook(pkt),
nft_reject_icmp_code(priv->icmp_code));
break;
}
break;
case htons(ETH_P_IPV6):
switch (priv->type) {
case NFT_REJECT_ICMP_UNREACH:
nft_reject_br_send_v6_unreach(nft_net(pkt), pkt->skb,
nft_in(pkt),
nft_hook(pkt),
priv->icmp_code);
break;
case NFT_REJECT_TCP_RST:
nft_reject_br_send_v6_tcp_reset(nft_net(pkt), pkt->skb,
nft_in(pkt),
nft_hook(pkt));
break;
case NFT_REJECT_ICMPX_UNREACH:
nft_reject_br_send_v6_unreach(nft_net(pkt), pkt->skb,
nft_in(pkt),
nft_hook(pkt),
nft_reject_icmpv6_code(priv->icmp_code));
break;
}
break;
default:
/* No explicit way to reject this protocol, drop it. */
break;
}
out:
regs->verdict.code = NF_DROP;
}