udplite nat was copied from udp, they are virtually 100% identical,
which isn't suprising given udplite is just udp with partial
checksum coverage.
Signed-off-by: Florian Westphal <fw@xxxxxxxxx>
---
include/net/netfilter/nf_nat_l4proto.h | 1 +
net/netfilter/Kconfig | 5 --
net/netfilter/Makefile | 1 -
net/netfilter/nf_nat_core.c | 2 +
net/netfilter/nf_nat_proto_udp.c | 76 +++++++++++++++++++----
net/netfilter/nf_nat_proto_udplite.c | 106 ---------------------------------
6 files changed, 68 insertions(+), 123 deletions(-)
delete mode 100644 net/netfilter/nf_nat_proto_udplite.c
diff --git a/include/net/netfilter/nf_nat_l4proto.h b/include/net/netfilter/nf_nat_l4proto.h
index 12f4cc841b6e..40fa3bf77c6e 100644
--- a/include/net/netfilter/nf_nat_l4proto.h
+++ b/include/net/netfilter/nf_nat_l4proto.h
@@ -51,6 +51,7 @@ const struct nf_nat_l4proto *__nf_nat_l4proto_find(u8 l3proto, u8 l4proto);
/* Built-in protocols. */
extern const struct nf_nat_l4proto nf_nat_l4proto_tcp;
extern const struct nf_nat_l4proto nf_nat_l4proto_udp;
+extern const struct nf_nat_l4proto nf_nat_l4proto_udplite;
extern const struct nf_nat_l4proto nf_nat_l4proto_icmp;
extern const struct nf_nat_l4proto nf_nat_l4proto_icmpv6;
extern const struct nf_nat_l4proto nf_nat_l4proto_unknown;
diff --git a/net/netfilter/Kconfig b/net/netfilter/Kconfig
index 9c34c2cabd76..61b9dd083663 100644
--- a/net/netfilter/Kconfig
+++ b/net/netfilter/Kconfig
@@ -378,11 +378,6 @@ config NF_NAT_PROTO_DCCP
depends on NF_NAT && NF_CT_PROTO_DCCP
default NF_NAT && NF_CT_PROTO_DCCP
-config NF_NAT_PROTO_UDPLITE
- tristate
- depends on NF_NAT && NF_CT_PROTO_UDPLITE
- default NF_NAT && NF_CT_PROTO_UDPLITE
-
config NF_NAT_PROTO_SCTP
tristate
default NF_NAT && NF_CT_PROTO_SCTP
diff --git a/net/netfilter/Makefile b/net/netfilter/Makefile
index 66c7faf52f20..51a5d3ea42fc 100644
--- a/net/netfilter/Makefile
+++ b/net/netfilter/Makefile
@@ -55,7 +55,6 @@ obj-$(CONFIG_NF_NAT_REDIRECT) += nf_nat_redirect.o
# NAT protocols (nf_nat)
obj-$(CONFIG_NF_NAT_PROTO_DCCP) += nf_nat_proto_dccp.o
-obj-$(CONFIG_NF_NAT_PROTO_UDPLITE) += nf_nat_proto_udplite.o
obj-$(CONFIG_NF_NAT_PROTO_SCTP) += nf_nat_proto_sctp.o
# NAT helpers
diff --git a/net/netfilter/nf_nat_core.c b/net/netfilter/nf_nat_core.c
index bbb8f3df79f7..2cc2cd0de82b 100644
--- a/net/netfilter/nf_nat_core.c
+++ b/net/netfilter/nf_nat_core.c
@@ -671,6 +671,8 @@ int nf_nat_l3proto_register(const struct nf_nat_l3proto *l3proto)
&nf_nat_l4proto_tcp);
RCU_INIT_POINTER(nf_nat_l4protos[l3proto->l3proto][IPPROTO_UDP],
&nf_nat_l4proto_udp);
+ RCU_INIT_POINTER(nf_nat_l4protos[l3proto->l3proto][IPPROTO_UDPLITE],
+ &nf_nat_l4proto_udplite);
mutex_unlock(&nf_nat_proto_mutex);
RCU_INIT_POINTER(nf_nat_l3protos[l3proto->l3proto], l3proto);
diff --git a/net/netfilter/nf_nat_proto_udp.c b/net/netfilter/nf_nat_proto_udp.c
index b1e627227b6e..bef76c1e0364 100644
--- a/net/netfilter/nf_nat_proto_udp.c
+++ b/net/netfilter/nf_nat_proto_udp.c
@@ -18,6 +18,7 @@
#include <net/netfilter/nf_nat_l4proto.h>
static u16 udp_port_rover;
+static u16 udplite_port_rover;
static void
udp_unique_tuple(const struct nf_nat_l3proto *l3proto,
@@ -30,20 +31,26 @@ udp_unique_tuple(const struct nf_nat_l3proto *l3proto,
&udp_port_rover);
}
+static void
+udplite_unique_tuple(const struct nf_nat_l3proto *l3proto,
+ struct nf_conntrack_tuple *tuple,
+ const struct nf_nat_range *range,
+ enum nf_nat_manip_type maniptype,
+ const struct nf_conn *ct)
+{
+ nf_nat_l4proto_unique_tuple(l3proto, tuple, range, maniptype, ct,
+ &udplite_port_rover);
+}
+
static bool
-udp_manip_pkt(struct sk_buff *skb,
- const struct nf_nat_l3proto *l3proto,
- unsigned int iphdroff, unsigned int hdroff,
- const struct nf_conntrack_tuple *tuple,
- enum nf_nat_manip_type maniptype)
+__udp_manip_pkt(struct sk_buff *skb,
+ const struct nf_nat_l3proto *l3proto,
+ unsigned int iphdroff, struct udphdr *hdr,
+ const struct nf_conntrack_tuple *tuple,
+ enum nf_nat_manip_type maniptype, bool do_csum)
{
- struct udphdr *hdr;
__be16 *portptr, newport;
- if (!skb_make_writable(skb, hdroff + sizeof(*hdr)))
- return false;
- hdr = (struct udphdr *)(skb->data + hdroff);
-
if (maniptype == NF_NAT_MANIP_SRC) {
/* Get rid of src port */
newport = tuple->src.u.udp.port;
@@ -53,7 +60,7 @@ udp_manip_pkt(struct sk_buff *skb,
newport = tuple->dst.u.udp.port;
portptr = &hdr->dest;
}
- if (hdr->check || skb->ip_summed == CHECKSUM_PARTIAL) {
+ if (do_csum) {
l3proto->csum_update(skb, iphdroff, &hdr->check,
tuple, maniptype);
inet_proto_csum_replace2(&hdr->check, skb, *portptr, newport,
@@ -65,6 +72,53 @@ udp_manip_pkt(struct sk_buff *skb,
return true;
}
+static bool
+udp_manip_pkt(struct sk_buff *skb,
+ const struct nf_nat_l3proto *l3proto,
+ unsigned int iphdroff, unsigned int hdroff,
+ const struct nf_conntrack_tuple *tuple,
+ enum nf_nat_manip_type maniptype)
+{
+ struct udphdr *hdr;
+ bool do_csum;
+
+ if (!skb_make_writable(skb, hdroff + sizeof(*hdr)))
+ return false;
+
+ hdr = (struct udphdr *)(skb->data + hdroff);
+ do_csum = hdr->check || skb->ip_summed == CHECKSUM_PARTIAL;
+
+ return __udp_manip_pkt(skb, l3proto, iphdroff, hdr, tuple,
+ maniptype, do_csum);
+}
+
+static bool
+udplite_manip_pkt(struct sk_buff *skb,
+ const struct nf_nat_l3proto *l3proto,
+ unsigned int iphdroff, unsigned int hdroff,
+ const struct nf_conntrack_tuple *tuple,
+ enum nf_nat_manip_type maniptype)
+{
+ struct udphdr *hdr;
+
+ if (!skb_make_writable(skb, hdroff + sizeof(*hdr)))
+ return false;
+
+ hdr = (struct udphdr *)(skb->data + hdroff);
+ return __udp_manip_pkt(skb, l3proto, iphdroff, hdr, tuple,
+ maniptype, true);
+}
+
+const struct nf_nat_l4proto nf_nat_l4proto_udplite = {
+ .l4proto = IPPROTO_UDPLITE,
+ .manip_pkt = udplite_manip_pkt,
+ .in_range = nf_nat_l4proto_in_range,
+ .unique_tuple = udplite_unique_tuple,
+#if IS_ENABLED(CONFIG_NF_CT_NETLINK)
+ .nlattr_to_range = nf_nat_l4proto_nlattr_to_range,
+#endif
+};
+
const struct nf_nat_l4proto nf_nat_l4proto_udp = {
.l4proto = IPPROTO_UDP,
.manip_pkt = udp_manip_pkt,
diff --git a/net/netfilter/nf_nat_proto_udplite.c b/net/netfilter/nf_nat_proto_udplite.c
deleted file mode 100644
index 58340c97bd83..000000000000
--- a/net/netfilter/nf_nat_proto_udplite.c
+++ /dev/null
@@ -1,106 +0,0 @@
-/* (C) 1999-2001 Paul `Rusty' Russell
- * (C) 2002-2006 Netfilter Core Team <coreteam@xxxxxxxxxxxxx>
- * (C) 2008 Patrick McHardy <kaber@xxxxxxxxx>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#include <linux/types.h>
-#include <linux/init.h>
-#include <linux/udp.h>
-
-#include <linux/netfilter.h>
-#include <linux/module.h>
-#include <net/netfilter/nf_nat.h>
-#include <net/netfilter/nf_nat_l3proto.h>
-#include <net/netfilter/nf_nat_l4proto.h>
-
-static u16 udplite_port_rover;
-
-static void
-udplite_unique_tuple(const struct nf_nat_l3proto *l3proto,
- struct nf_conntrack_tuple *tuple,
- const struct nf_nat_range *range,
- enum nf_nat_manip_type maniptype,
- const struct nf_conn *ct)
-{
- nf_nat_l4proto_unique_tuple(l3proto, tuple, range, maniptype, ct,
- &udplite_port_rover);
-}
-
-static bool
-udplite_manip_pkt(struct sk_buff *skb,
- const struct nf_nat_l3proto *l3proto,
- unsigned int iphdroff, unsigned int hdroff,
- const struct nf_conntrack_tuple *tuple,
- enum nf_nat_manip_type maniptype)
-{
- struct udphdr *hdr;
- __be16 *portptr, newport;
-
- if (!skb_make_writable(skb, hdroff + sizeof(*hdr)))
- return false;
-
- hdr = (struct udphdr *)(skb->data + hdroff);
-
- if (maniptype == NF_NAT_MANIP_SRC) {
- /* Get rid of source port */
- newport = tuple->src.u.udp.port;
- portptr = &hdr->source;
- } else {
- /* Get rid of dst port */
- newport = tuple->dst.u.udp.port;
- portptr = &hdr->dest;
- }
-
- l3proto->csum_update(skb, iphdroff, &hdr->check, tuple, maniptype);
- inet_proto_csum_replace2(&hdr->check, skb, *portptr, newport, false);
- if (!hdr->check)
- hdr->check = CSUM_MANGLED_0;
-
- *portptr = newport;
- return true;
-}
-
-static const struct nf_nat_l4proto nf_nat_l4proto_udplite = {
- .l4proto = IPPROTO_UDPLITE,
- .manip_pkt = udplite_manip_pkt,
- .in_range = nf_nat_l4proto_in_range,
- .unique_tuple = udplite_unique_tuple,
-#if IS_ENABLED(CONFIG_NF_CT_NETLINK)
- .nlattr_to_range = nf_nat_l4proto_nlattr_to_range,
-#endif
-};
-
-static int __init nf_nat_proto_udplite_init(void)
-{
- int err;
-
- err = nf_nat_l4proto_register(NFPROTO_IPV4, &nf_nat_l4proto_udplite);
- if (err < 0)
- goto err1;
- err = nf_nat_l4proto_register(NFPROTO_IPV6, &nf_nat_l4proto_udplite);
- if (err < 0)
- goto err2;
- return 0;
-
-err2:
- nf_nat_l4proto_unregister(NFPROTO_IPV4, &nf_nat_l4proto_udplite);
-err1:
- return err;
-}
-
-static void __exit nf_nat_proto_udplite_fini(void)
-{
- nf_nat_l4proto_unregister(NFPROTO_IPV6, &nf_nat_l4proto_udplite);
- nf_nat_l4proto_unregister(NFPROTO_IPV4, &nf_nat_l4proto_udplite);
-}
-
-module_init(nf_nat_proto_udplite_init);
-module_exit(nf_nat_proto_udplite_fini);
-
-MODULE_LICENSE("GPL");
-MODULE_DESCRIPTION("UDP-Lite NAT protocol helper");
-MODULE_AUTHOR("Patrick McHardy <kaber@xxxxxxxxx>");
--
2.7.3
--
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