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-rw-r--r--net/netfilter/nf_nat_core.c27
-rw-r--r--net/netfilter/nf_nat_helper.c2
-rw-r--r--net/netfilter/nf_nat_proto_common.c9
-rw-r--r--net/netfilter/nf_nat_proto_dccp.c2
-rw-r--r--net/netfilter/nf_nat_proto_sctp.c2
-rw-r--r--net/netfilter/nf_nat_proto_tcp.c2
-rw-r--r--net/netfilter/nf_nat_proto_udp.c4
-rw-r--r--net/netfilter/nf_nat_proto_unknown.c2
-rw-r--r--net/netfilter/nf_nat_redirect.c6
-rw-r--r--net/netfilter/nf_nat_sip.c2
-rw-r--r--net/netfilter/nft_nat.c2
-rw-r--r--net/netfilter/xt_NETMAP.c8
-rw-r--r--net/netfilter/xt_REDIRECT.c2
-rw-r--r--net/netfilter/xt_nat.c72
14 files changed, 103 insertions, 39 deletions
diff --git a/net/netfilter/nf_nat_core.c b/net/netfilter/nf_nat_core.c
index 617693ff9f4c..37b3c9913b08 100644
--- a/net/netfilter/nf_nat_core.c
+++ b/net/netfilter/nf_nat_core.c
@@ -157,7 +157,7 @@ EXPORT_SYMBOL(nf_nat_used_tuple);
static int in_range(const struct nf_nat_l3proto *l3proto,
const struct nf_nat_l4proto *l4proto,
const struct nf_conntrack_tuple *tuple,
- const struct nf_nat_range *range)
+ const struct nf_nat_range2 *range)
{
/* If we are supposed to map IPs, then we must be in the
* range specified, otherwise let this drag us onto a new src IP.
@@ -194,7 +194,7 @@ find_appropriate_src(struct net *net,
const struct nf_nat_l4proto *l4proto,
const struct nf_conntrack_tuple *tuple,
struct nf_conntrack_tuple *result,
- const struct nf_nat_range *range)
+ const struct nf_nat_range2 *range)
{
unsigned int h = hash_by_src(net, tuple);
const struct nf_conn *ct;
@@ -224,7 +224,7 @@ find_appropriate_src(struct net *net,
static void
find_best_ips_proto(const struct nf_conntrack_zone *zone,
struct nf_conntrack_tuple *tuple,
- const struct nf_nat_range *range,
+ const struct nf_nat_range2 *range,
const struct nf_conn *ct,
enum nf_nat_manip_type maniptype)
{
@@ -298,7 +298,7 @@ find_best_ips_proto(const struct nf_conntrack_zone *zone,
static void
get_unique_tuple(struct nf_conntrack_tuple *tuple,
const struct nf_conntrack_tuple *orig_tuple,
- const struct nf_nat_range *range,
+ const struct nf_nat_range2 *range,
struct nf_conn *ct,
enum nf_nat_manip_type maniptype)
{
@@ -349,9 +349,10 @@ get_unique_tuple(struct nf_conntrack_tuple *tuple,
/* Only bother mapping if it's not already in range and unique */
if (!(range->flags & NF_NAT_RANGE_PROTO_RANDOM_ALL)) {
if (range->flags & NF_NAT_RANGE_PROTO_SPECIFIED) {
- if (l4proto->in_range(tuple, maniptype,
- &range->min_proto,
- &range->max_proto) &&
+ if (!(range->flags & NF_NAT_RANGE_PROTO_OFFSET) &&
+ l4proto->in_range(tuple, maniptype,
+ &range->min_proto,
+ &range->max_proto) &&
(range->min_proto.all == range->max_proto.all ||
!nf_nat_used_tuple(tuple, ct)))
goto out;
@@ -360,7 +361,7 @@ get_unique_tuple(struct nf_conntrack_tuple *tuple,
}
}
- /* Last change: get protocol to try to obtain unique tuple. */
+ /* Last chance: get protocol to try to obtain unique tuple. */
l4proto->unique_tuple(l3proto, tuple, range, maniptype, ct);
out:
rcu_read_unlock();
@@ -381,7 +382,7 @@ EXPORT_SYMBOL_GPL(nf_ct_nat_ext_add);
unsigned int
nf_nat_setup_info(struct nf_conn *ct,
- const struct nf_nat_range *range,
+ const struct nf_nat_range2 *range,
enum nf_nat_manip_type maniptype)
{
struct net *net = nf_ct_net(ct);
@@ -459,7 +460,7 @@ __nf_nat_alloc_null_binding(struct nf_conn *ct, enum nf_nat_manip_type manip)
(manip == NF_NAT_MANIP_SRC ?
ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.u3 :
ct->tuplehash[IP_CT_DIR_REPLY].tuple.src.u3);
- struct nf_nat_range range = {
+ struct nf_nat_range2 range = {
.flags = NF_NAT_RANGE_MAP_IPS,
.min_addr = ip,
.max_addr = ip,
@@ -702,7 +703,7 @@ static const struct nla_policy protonat_nla_policy[CTA_PROTONAT_MAX+1] = {
static int nfnetlink_parse_nat_proto(struct nlattr *attr,
const struct nf_conn *ct,
- struct nf_nat_range *range)
+ struct nf_nat_range2 *range)
{
struct nlattr *tb[CTA_PROTONAT_MAX+1];
const struct nf_nat_l4proto *l4proto;
@@ -730,7 +731,7 @@ static const struct nla_policy nat_nla_policy[CTA_NAT_MAX+1] = {
static int
nfnetlink_parse_nat(const struct nlattr *nat,
- const struct nf_conn *ct, struct nf_nat_range *range,
+ const struct nf_conn *ct, struct nf_nat_range2 *range,
const struct nf_nat_l3proto *l3proto)
{
struct nlattr *tb[CTA_NAT_MAX+1];
@@ -758,7 +759,7 @@ nfnetlink_parse_nat_setup(struct nf_conn *ct,
enum nf_nat_manip_type manip,
const struct nlattr *attr)
{
- struct nf_nat_range range;
+ struct nf_nat_range2 range;
const struct nf_nat_l3proto *l3proto;
int err;
diff --git a/net/netfilter/nf_nat_helper.c b/net/netfilter/nf_nat_helper.c
index 607a373379b4..99606baedda4 100644
--- a/net/netfilter/nf_nat_helper.c
+++ b/net/netfilter/nf_nat_helper.c
@@ -191,7 +191,7 @@ EXPORT_SYMBOL(nf_nat_mangle_udp_packet);
void nf_nat_follow_master(struct nf_conn *ct,
struct nf_conntrack_expect *exp)
{
- struct nf_nat_range range;
+ struct nf_nat_range2 range;
/* This must be a fresh one. */
BUG_ON(ct->status & IPS_NAT_DONE_MASK);
diff --git a/net/netfilter/nf_nat_proto_common.c b/net/netfilter/nf_nat_proto_common.c
index 7d7466dbf663..5d849d835561 100644
--- a/net/netfilter/nf_nat_proto_common.c
+++ b/net/netfilter/nf_nat_proto_common.c
@@ -36,7 +36,7 @@ EXPORT_SYMBOL_GPL(nf_nat_l4proto_in_range);
void nf_nat_l4proto_unique_tuple(const struct nf_nat_l3proto *l3proto,
struct nf_conntrack_tuple *tuple,
- const struct nf_nat_range *range,
+ const struct nf_nat_range2 *range,
enum nf_nat_manip_type maniptype,
const struct nf_conn *ct,
u16 *rover)
@@ -83,6 +83,8 @@ void nf_nat_l4proto_unique_tuple(const struct nf_nat_l3proto *l3proto,
: tuple->src.u.all);
} else if (range->flags & NF_NAT_RANGE_PROTO_RANDOM_FULLY) {
off = prandom_u32();
+ } else if (range->flags & NF_NAT_RANGE_PROTO_OFFSET) {
+ off = (ntohs(*portptr) - ntohs(range->base_proto.all));
} else {
off = *rover;
}
@@ -91,7 +93,8 @@ void nf_nat_l4proto_unique_tuple(const struct nf_nat_l3proto *l3proto,
*portptr = htons(min + off % range_size);
if (++i != range_size && nf_nat_used_tuple(tuple, ct))
continue;
- if (!(range->flags & NF_NAT_RANGE_PROTO_RANDOM_ALL))
+ if (!(range->flags & (NF_NAT_RANGE_PROTO_RANDOM_ALL|
+ NF_NAT_RANGE_PROTO_OFFSET)))
*rover = off;
return;
}
@@ -100,7 +103,7 @@ EXPORT_SYMBOL_GPL(nf_nat_l4proto_unique_tuple);
#if IS_ENABLED(CONFIG_NF_CT_NETLINK)
int nf_nat_l4proto_nlattr_to_range(struct nlattr *tb[],
- struct nf_nat_range *range)
+ struct nf_nat_range2 *range)
{
if (tb[CTA_PROTONAT_PORT_MIN]) {
range->min_proto.all = nla_get_be16(tb[CTA_PROTONAT_PORT_MIN]);
diff --git a/net/netfilter/nf_nat_proto_dccp.c b/net/netfilter/nf_nat_proto_dccp.c
index 269fcd5dc34c..67ea0d83aa5a 100644
--- a/net/netfilter/nf_nat_proto_dccp.c
+++ b/net/netfilter/nf_nat_proto_dccp.c
@@ -23,7 +23,7 @@ static u_int16_t dccp_port_rover;
static void
dccp_unique_tuple(const struct nf_nat_l3proto *l3proto,
struct nf_conntrack_tuple *tuple,
- const struct nf_nat_range *range,
+ const struct nf_nat_range2 *range,
enum nf_nat_manip_type maniptype,
const struct nf_conn *ct)
{
diff --git a/net/netfilter/nf_nat_proto_sctp.c b/net/netfilter/nf_nat_proto_sctp.c
index c57ee3240b1d..1c5d9b65fbba 100644
--- a/net/netfilter/nf_nat_proto_sctp.c
+++ b/net/netfilter/nf_nat_proto_sctp.c
@@ -17,7 +17,7 @@ static u_int16_t nf_sctp_port_rover;
static void
sctp_unique_tuple(const struct nf_nat_l3proto *l3proto,
struct nf_conntrack_tuple *tuple,
- const struct nf_nat_range *range,
+ const struct nf_nat_range2 *range,
enum nf_nat_manip_type maniptype,
const struct nf_conn *ct)
{
diff --git a/net/netfilter/nf_nat_proto_tcp.c b/net/netfilter/nf_nat_proto_tcp.c
index 4f8820fc5148..f15fcd475f98 100644
--- a/net/netfilter/nf_nat_proto_tcp.c
+++ b/net/netfilter/nf_nat_proto_tcp.c
@@ -23,7 +23,7 @@ static u16 tcp_port_rover;
static void
tcp_unique_tuple(const struct nf_nat_l3proto *l3proto,
struct nf_conntrack_tuple *tuple,
- const struct nf_nat_range *range,
+ const struct nf_nat_range2 *range,
enum nf_nat_manip_type maniptype,
const struct nf_conn *ct)
{
diff --git a/net/netfilter/nf_nat_proto_udp.c b/net/netfilter/nf_nat_proto_udp.c
index edd4a77dc09a..5790f70a83b2 100644
--- a/net/netfilter/nf_nat_proto_udp.c
+++ b/net/netfilter/nf_nat_proto_udp.c
@@ -22,7 +22,7 @@ static u16 udp_port_rover;
static void
udp_unique_tuple(const struct nf_nat_l3proto *l3proto,
struct nf_conntrack_tuple *tuple,
- const struct nf_nat_range *range,
+ const struct nf_nat_range2 *range,
enum nf_nat_manip_type maniptype,
const struct nf_conn *ct)
{
@@ -100,7 +100,7 @@ static bool udplite_manip_pkt(struct sk_buff *skb,
static void
udplite_unique_tuple(const struct nf_nat_l3proto *l3proto,
struct nf_conntrack_tuple *tuple,
- const struct nf_nat_range *range,
+ const struct nf_nat_range2 *range,
enum nf_nat_manip_type maniptype,
const struct nf_conn *ct)
{
diff --git a/net/netfilter/nf_nat_proto_unknown.c b/net/netfilter/nf_nat_proto_unknown.c
index 6e494d584412..c5db3e251232 100644
--- a/net/netfilter/nf_nat_proto_unknown.c
+++ b/net/netfilter/nf_nat_proto_unknown.c
@@ -27,7 +27,7 @@ static bool unknown_in_range(const struct nf_conntrack_tuple *tuple,
static void unknown_unique_tuple(const struct nf_nat_l3proto *l3proto,
struct nf_conntrack_tuple *tuple,
- const struct nf_nat_range *range,
+ const struct nf_nat_range2 *range,
enum nf_nat_manip_type maniptype,
const struct nf_conn *ct)
{
diff --git a/net/netfilter/nf_nat_redirect.c b/net/netfilter/nf_nat_redirect.c
index 25b06b959118..7c4bb0a773ca 100644
--- a/net/netfilter/nf_nat_redirect.c
+++ b/net/netfilter/nf_nat_redirect.c
@@ -36,7 +36,7 @@ nf_nat_redirect_ipv4(struct sk_buff *skb,
struct nf_conn *ct;
enum ip_conntrack_info ctinfo;
__be32 newdst;
- struct nf_nat_range newrange;
+ struct nf_nat_range2 newrange;
WARN_ON(hooknum != NF_INET_PRE_ROUTING &&
hooknum != NF_INET_LOCAL_OUT);
@@ -82,10 +82,10 @@ EXPORT_SYMBOL_GPL(nf_nat_redirect_ipv4);
static const struct in6_addr loopback_addr = IN6ADDR_LOOPBACK_INIT;
unsigned int
-nf_nat_redirect_ipv6(struct sk_buff *skb, const struct nf_nat_range *range,
+nf_nat_redirect_ipv6(struct sk_buff *skb, const struct nf_nat_range2 *range,
unsigned int hooknum)
{
- struct nf_nat_range newrange;
+ struct nf_nat_range2 newrange;
struct in6_addr newdst;
enum ip_conntrack_info ctinfo;
struct nf_conn *ct;
diff --git a/net/netfilter/nf_nat_sip.c b/net/netfilter/nf_nat_sip.c
index 791fac4fd745..1f3086074981 100644
--- a/net/netfilter/nf_nat_sip.c
+++ b/net/netfilter/nf_nat_sip.c
@@ -316,7 +316,7 @@ static void nf_nat_sip_seq_adjust(struct sk_buff *skb, unsigned int protoff,
static void nf_nat_sip_expected(struct nf_conn *ct,
struct nf_conntrack_expect *exp)
{
- struct nf_nat_range range;
+ struct nf_nat_range2 range;
/* This must be a fresh one. */
BUG_ON(ct->status & IPS_NAT_DONE_MASK);
diff --git a/net/netfilter/nft_nat.c b/net/netfilter/nft_nat.c
index 1f36954c2ba9..c15807d10b91 100644
--- a/net/netfilter/nft_nat.c
+++ b/net/netfilter/nft_nat.c
@@ -43,7 +43,7 @@ static void nft_nat_eval(const struct nft_expr *expr,
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;
+ struct nf_nat_range2 range;
memset(&range, 0, sizeof(range));
if (priv->sreg_addr_min) {
diff --git a/net/netfilter/xt_NETMAP.c b/net/netfilter/xt_NETMAP.c
index 58aa9dd3c5b7..1d437875e15a 100644
--- a/net/netfilter/xt_NETMAP.c
+++ b/net/netfilter/xt_NETMAP.c
@@ -21,8 +21,8 @@
static unsigned int
netmap_tg6(struct sk_buff *skb, const struct xt_action_param *par)
{
- const struct nf_nat_range *range = par->targinfo;
- struct nf_nat_range newrange;
+ const struct nf_nat_range2 *range = par->targinfo;
+ struct nf_nat_range2 newrange;
struct nf_conn *ct;
enum ip_conntrack_info ctinfo;
union nf_inet_addr new_addr, netmask;
@@ -56,7 +56,7 @@ netmap_tg6(struct sk_buff *skb, const struct xt_action_param *par)
static int netmap_tg6_checkentry(const struct xt_tgchk_param *par)
{
- const struct nf_nat_range *range = par->targinfo;
+ const struct nf_nat_range2 *range = par->targinfo;
if (!(range->flags & NF_NAT_RANGE_MAP_IPS))
return -EINVAL;
@@ -75,7 +75,7 @@ netmap_tg4(struct sk_buff *skb, const struct xt_action_param *par)
enum ip_conntrack_info ctinfo;
__be32 new_ip, netmask;
const struct nf_nat_ipv4_multi_range_compat *mr = par->targinfo;
- struct nf_nat_range newrange;
+ struct nf_nat_range2 newrange;
WARN_ON(xt_hooknum(par) != NF_INET_PRE_ROUTING &&
xt_hooknum(par) != NF_INET_POST_ROUTING &&
diff --git a/net/netfilter/xt_REDIRECT.c b/net/netfilter/xt_REDIRECT.c
index 98a4c6d4f1cb..5ce9461e979c 100644
--- a/net/netfilter/xt_REDIRECT.c
+++ b/net/netfilter/xt_REDIRECT.c
@@ -36,7 +36,7 @@ redirect_tg6(struct sk_buff *skb, const struct xt_action_param *par)
static int redirect_tg6_checkentry(const struct xt_tgchk_param *par)
{
- const struct nf_nat_range *range = par->targinfo;
+ const struct nf_nat_range2 *range = par->targinfo;
if (range->flags & NF_NAT_RANGE_MAP_IPS)
return -EINVAL;
diff --git a/net/netfilter/xt_nat.c b/net/netfilter/xt_nat.c
index bdb689cdc829..8af9707f8789 100644
--- a/net/netfilter/xt_nat.c
+++ b/net/netfilter/xt_nat.c
@@ -37,11 +37,12 @@ static void xt_nat_destroy(const struct xt_tgdtor_param *par)
nf_ct_netns_put(par->net, par->family);
}
-static void xt_nat_convert_range(struct nf_nat_range *dst,
+static void xt_nat_convert_range(struct nf_nat_range2 *dst,
const struct nf_nat_ipv4_range *src)
{
memset(&dst->min_addr, 0, sizeof(dst->min_addr));
memset(&dst->max_addr, 0, sizeof(dst->max_addr));
+ memset(&dst->base_proto, 0, sizeof(dst->base_proto));
dst->flags = src->flags;
dst->min_addr.ip = src->min_ip;
@@ -54,7 +55,7 @@ static unsigned int
xt_snat_target_v0(struct sk_buff *skb, const struct xt_action_param *par)
{
const struct nf_nat_ipv4_multi_range_compat *mr = par->targinfo;
- struct nf_nat_range range;
+ struct nf_nat_range2 range;
enum ip_conntrack_info ctinfo;
struct nf_conn *ct;
@@ -71,7 +72,7 @@ static unsigned int
xt_dnat_target_v0(struct sk_buff *skb, const struct xt_action_param *par)
{
const struct nf_nat_ipv4_multi_range_compat *mr = par->targinfo;
- struct nf_nat_range range;
+ struct nf_nat_range2 range;
enum ip_conntrack_info ctinfo;
struct nf_conn *ct;
@@ -86,7 +87,8 @@ xt_dnat_target_v0(struct sk_buff *skb, const struct xt_action_param *par)
static unsigned int
xt_snat_target_v1(struct sk_buff *skb, const struct xt_action_param *par)
{
- const struct nf_nat_range *range = par->targinfo;
+ const struct nf_nat_range *range_v1 = par->targinfo;
+ struct nf_nat_range2 range;
enum ip_conntrack_info ctinfo;
struct nf_conn *ct;
@@ -95,13 +97,49 @@ xt_snat_target_v1(struct sk_buff *skb, const struct xt_action_param *par)
(ctinfo == IP_CT_NEW || ctinfo == IP_CT_RELATED ||
ctinfo == IP_CT_RELATED_REPLY)));
- return nf_nat_setup_info(ct, range, NF_NAT_MANIP_SRC);
+ memcpy(&range, range_v1, sizeof(*range_v1));
+ memset(&range.base_proto, 0, sizeof(range.base_proto));
+
+ return nf_nat_setup_info(ct, &range, NF_NAT_MANIP_SRC);
}
static unsigned int
xt_dnat_target_v1(struct sk_buff *skb, const struct xt_action_param *par)
{
- const struct nf_nat_range *range = par->targinfo;
+ const struct nf_nat_range *range_v1 = par->targinfo;
+ struct nf_nat_range2 range;
+ enum ip_conntrack_info ctinfo;
+ struct nf_conn *ct;
+
+ ct = nf_ct_get(skb, &ctinfo);
+ WARN_ON(!(ct != NULL &&
+ (ctinfo == IP_CT_NEW || ctinfo == IP_CT_RELATED)));
+
+ memcpy(&range, range_v1, sizeof(*range_v1));
+ memset(&range.base_proto, 0, sizeof(range.base_proto));
+
+ return nf_nat_setup_info(ct, &range, NF_NAT_MANIP_DST);
+}
+
+static unsigned int
+xt_snat_target_v2(struct sk_buff *skb, const struct xt_action_param *par)
+{
+ const struct nf_nat_range2 *range = par->targinfo;
+ enum ip_conntrack_info ctinfo;
+ struct nf_conn *ct;
+
+ ct = nf_ct_get(skb, &ctinfo);
+ WARN_ON(!(ct != NULL &&
+ (ctinfo == IP_CT_NEW || ctinfo == IP_CT_RELATED ||
+ ctinfo == IP_CT_RELATED_REPLY)));
+
+ return nf_nat_setup_info(ct, range, NF_NAT_MANIP_SRC);
+}
+
+static unsigned int
+xt_dnat_target_v2(struct sk_buff *skb, const struct xt_action_param *par)
+{
+ const struct nf_nat_range2 *range = par->targinfo;
enum ip_conntrack_info ctinfo;
struct nf_conn *ct;
@@ -163,6 +201,28 @@ static struct xt_target xt_nat_target_reg[] __read_mostly = {
(1 << NF_INET_LOCAL_OUT),
.me = THIS_MODULE,
},
+ {
+ .name = "SNAT",
+ .revision = 2,
+ .checkentry = xt_nat_checkentry,
+ .destroy = xt_nat_destroy,
+ .target = xt_snat_target_v2,
+ .targetsize = sizeof(struct nf_nat_range2),
+ .table = "nat",
+ .hooks = (1 << NF_INET_POST_ROUTING) |
+ (1 << NF_INET_LOCAL_IN),
+ .me = THIS_MODULE,
+ },
+ {
+ .name = "DNAT",
+ .revision = 2,
+ .target = xt_dnat_target_v2,
+ .targetsize = sizeof(struct nf_nat_range2),
+ .table = "nat",
+ .hooks = (1 << NF_INET_PRE_ROUTING) |
+ (1 << NF_INET_LOCAL_OUT),
+ .me = THIS_MODULE,
+ },
};
static int __init xt_nat_init(void)
generated by cgit (git 2.34.1) at 2024-07-05 17:23:02 +0000