---
`git clone` fails on case-insensitive file systems, e.g., on Windows,
MSYS, Cygwin due to case sensitive files. All but one are in
netfilter, and they seem to be old code that isn't necessary.
include/uapi/linux/netfilter/xt_CONNMARK.h | 7 -
include/uapi/linux/netfilter/xt_DSCP.h | 27 --
include/uapi/linux/netfilter/xt_MARK.h | 7 -
include/uapi/linux/netfilter/xt_RATEEST.h | 17 -
include/uapi/linux/netfilter/xt_TCPMSS.h | 13 -
include/uapi/linux/netfilter_ipv4/ipt_ECN.h | 34 --
include/uapi/linux/netfilter_ipv4/ipt_TTL.h | 24 --
include/uapi/linux/netfilter_ipv6/ip6t_HL.h | 25 --
net/netfilter/Makefile | 4 -
net/netfilter/xt_DSCP.c | 161 ---------
net/netfilter/xt_HL.c | 159 ---------
net/netfilter/xt_RATEEST.c | 233 -------------
net/netfilter/xt_TCPMSS.c | 345 --------------------
13 files changed, 1056 deletions(-)
delete mode 100644 include/uapi/linux/netfilter/xt_CONNMARK.h
delete mode 100644 include/uapi/linux/netfilter/xt_DSCP.h
delete mode 100644 include/uapi/linux/netfilter/xt_MARK.h
delete mode 100644 include/uapi/linux/netfilter/xt_RATEEST.h
delete mode 100644 include/uapi/linux/netfilter/xt_TCPMSS.h
delete mode 100644 include/uapi/linux/netfilter_ipv4/ipt_ECN.h
delete mode 100644 include/uapi/linux/netfilter_ipv4/ipt_TTL.h
delete mode 100644 include/uapi/linux/netfilter_ipv6/ip6t_HL.h
delete mode 100644 net/netfilter/xt_DSCP.c
delete mode 100644 net/netfilter/xt_HL.c
delete mode 100644 net/netfilter/xt_RATEEST.c
delete mode 100644 net/netfilter/xt_TCPMSS.c
diff --git a/include/uapi/linux/netfilter/xt_CONNMARK.h
b/include/uapi/linux/netfilter/xt_CONNMARK.h
deleted file mode 100644
index 36cc956ea..000000000
--- a/include/uapi/linux/netfilter/xt_CONNMARK.h
+++ /dev/null
@@ -1,7 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-#ifndef _XT_CONNMARK_H_target
-#define _XT_CONNMARK_H_target
-
-#include <linux/netfilter/xt_connmark.h>
-
-#endif /*_XT_CONNMARK_H_target*/
diff --git a/include/uapi/linux/netfilter/xt_DSCP.h
b/include/uapi/linux/netfilter/xt_DSCP.h
deleted file mode 100644
index 223d635e8..000000000
--- a/include/uapi/linux/netfilter/xt_DSCP.h
+++ /dev/null
@@ -1,27 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-/* x_tables module for setting the IPv4/IPv6 DSCP field
- *
- * (C) 2002 Harald Welte <[email protected]>
- * based on ipt_FTOS.c (C) 2000 by Matthew G. Marsh <[email protected]>
- * This software is distributed under GNU GPL v2, 1991
- *
- * See RFC2474 for a description of the DSCP field within the IP Header.
- *
- * xt_DSCP.h,v 1.7 2002/03/14 12:03:13 laforge Exp
-*/
-#ifndef _XT_DSCP_TARGET_H
-#define _XT_DSCP_TARGET_H
-#include <linux/netfilter/xt_dscp.h>
-#include <linux/types.h>
-
-/* target info */
-struct xt_DSCP_info {
- __u8 dscp;
-};
-
-struct xt_tos_target_info {
- __u8 tos_value;
- __u8 tos_mask;
-};
-
-#endif /* _XT_DSCP_TARGET_H */
diff --git a/include/uapi/linux/netfilter/xt_MARK.h
b/include/uapi/linux/netfilter/xt_MARK.h
deleted file mode 100644
index f1fe2b4be..000000000
--- a/include/uapi/linux/netfilter/xt_MARK.h
+++ /dev/null
@@ -1,7 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-#ifndef _XT_MARK_H_target
-#define _XT_MARK_H_target
-
-#include <linux/netfilter/xt_mark.h>
-
-#endif /*_XT_MARK_H_target */
diff --git a/include/uapi/linux/netfilter/xt_RATEEST.h
b/include/uapi/linux/netfilter/xt_RATEEST.h
deleted file mode 100644
index 2b87a71e6..000000000
--- a/include/uapi/linux/netfilter/xt_RATEEST.h
+++ /dev/null
@@ -1,17 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-#ifndef _XT_RATEEST_TARGET_H
-#define _XT_RATEEST_TARGET_H
-
-#include <linux/types.h>
-#include <linux/if.h>
-
-struct xt_rateest_target_info {
- char name[IFNAMSIZ];
- __s8 interval;
- __u8 ewma_log;
-
- /* Used internally by the kernel */
- struct xt_rateest *est __attribute__((aligned(8)));
-};
-
-#endif /* _XT_RATEEST_TARGET_H */
diff --git a/include/uapi/linux/netfilter/xt_TCPMSS.h
b/include/uapi/linux/netfilter/xt_TCPMSS.h
deleted file mode 100644
index 65ea6c9da..000000000
--- a/include/uapi/linux/netfilter/xt_TCPMSS.h
+++ /dev/null
@@ -1,13 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-#ifndef _XT_TCPMSS_H
-#define _XT_TCPMSS_H
-
-#include <linux/types.h>
-
-struct xt_tcpmss_info {
- __u16 mss;
-};
-
-#define XT_TCPMSS_CLAMP_PMTU 0xffff
-
-#endif /* _XT_TCPMSS_H */
diff --git a/include/uapi/linux/netfilter_ipv4/ipt_ECN.h
b/include/uapi/linux/netfilter_ipv4/ipt_ECN.h
deleted file mode 100644
index e3630fd04..000000000
--- a/include/uapi/linux/netfilter_ipv4/ipt_ECN.h
+++ /dev/null
@@ -1,34 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-/* Header file for iptables ipt_ECN target
- *
- * (C) 2002 by Harald Welte <[email protected]>
- *
- * This software is distributed under GNU GPL v2, 1991
- *
- * ipt_ECN.h,v 1.3 2002/05/29 12:17:40 laforge Exp
-*/
-#ifndef _IPT_ECN_TARGET_H
-#define _IPT_ECN_TARGET_H
-
-#include <linux/types.h>
-#include <linux/netfilter/xt_DSCP.h>
-
-#define IPT_ECN_IP_MASK (~XT_DSCP_MASK)
-
-#define IPT_ECN_OP_SET_IP 0x01 /* set ECN bits of IPv4 header */
-#define IPT_ECN_OP_SET_ECE 0x10 /* set ECE bit of TCP header */
-#define IPT_ECN_OP_SET_CWR 0x20 /* set CWR bit of TCP header */
-
-#define IPT_ECN_OP_MASK 0xce
-
-struct ipt_ECN_info {
- __u8 operation; /* bitset of operations */
- __u8 ip_ect; /* ECT codepoint of IPv4 header, pre-shifted */
- union {
- struct {
- __u8 ece:1, cwr:1; /* TCP ECT bits */
- } tcp;
- } proto;
-};
-
-#endif /* _IPT_ECN_TARGET_H */
diff --git a/include/uapi/linux/netfilter_ipv4/ipt_TTL.h
b/include/uapi/linux/netfilter_ipv4/ipt_TTL.h
deleted file mode 100644
index 57d2fc67a..000000000
--- a/include/uapi/linux/netfilter_ipv4/ipt_TTL.h
+++ /dev/null
@@ -1,24 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-/* TTL modification module for IP tables
- * (C) 2000 by Harald Welte <[email protected]> */
-
-#ifndef _IPT_TTL_H
-#define _IPT_TTL_H
-
-#include <linux/types.h>
-
-enum {
- IPT_TTL_SET = 0,
- IPT_TTL_INC,
- IPT_TTL_DEC
-};
-
-#define IPT_TTL_MAXMODE IPT_TTL_DEC
-
-struct ipt_TTL_info {
- __u8 mode;
- __u8 ttl;
-};
-
-
-#endif
diff --git a/include/uapi/linux/netfilter_ipv6/ip6t_HL.h
b/include/uapi/linux/netfilter_ipv6/ip6t_HL.h
deleted file mode 100644
index eaed56a28..000000000
--- a/include/uapi/linux/netfilter_ipv6/ip6t_HL.h
+++ /dev/null
@@ -1,25 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-/* Hop Limit modification module for ip6tables
- * Maciej Soltysiak <[email protected]>
- * Based on HW's TTL module */
-
-#ifndef _IP6T_HL_H
-#define _IP6T_HL_H
-
-#include <linux/types.h>
-
-enum {
- IP6T_HL_SET = 0,
- IP6T_HL_INC,
- IP6T_HL_DEC
-};
-
-#define IP6T_HL_MAXMODE IP6T_HL_DEC
-
-struct ip6t_HL_info {
- __u8 mode;
- __u8 hop_limit;
-};
-
-
-#endif
diff --git a/net/netfilter/Makefile b/net/netfilter/Makefile
index d4958e7e7..a7f8ffeb0 100644
--- a/net/netfilter/Makefile
+++ b/net/netfilter/Makefile
@@ -162,20 +162,16 @@ obj-$(CONFIG_NETFILTER_XT_TARGET_CHECKSUM) +=
xt_CHECKSUM.o
obj-$(CONFIG_NETFILTER_XT_TARGET_CLASSIFY) += xt_CLASSIFY.o
obj-$(CONFIG_NETFILTER_XT_TARGET_CONNSECMARK) += xt_CONNSECMARK.o
obj-$(CONFIG_NETFILTER_XT_TARGET_CT) += xt_CT.o
-obj-$(CONFIG_NETFILTER_XT_TARGET_DSCP) += xt_DSCP.o
-obj-$(CONFIG_NETFILTER_XT_TARGET_HL) += xt_HL.o
obj-$(CONFIG_NETFILTER_XT_TARGET_HMARK) += xt_HMARK.o
obj-$(CONFIG_NETFILTER_XT_TARGET_LED) += xt_LED.o
obj-$(CONFIG_NETFILTER_XT_TARGET_LOG) += xt_LOG.o
obj-$(CONFIG_NETFILTER_XT_TARGET_NETMAP) += xt_NETMAP.o
obj-$(CONFIG_NETFILTER_XT_TARGET_NFLOG) += xt_NFLOG.o
obj-$(CONFIG_NETFILTER_XT_TARGET_NFQUEUE) += xt_NFQUEUE.o
-obj-$(CONFIG_NETFILTER_XT_TARGET_RATEEST) += xt_RATEEST.o
obj-$(CONFIG_NETFILTER_XT_TARGET_REDIRECT) += xt_REDIRECT.o
obj-$(CONFIG_NETFILTER_XT_TARGET_MASQUERADE) += xt_MASQUERADE.o
obj-$(CONFIG_NETFILTER_XT_TARGET_SECMARK) += xt_SECMARK.o
obj-$(CONFIG_NETFILTER_XT_TARGET_TPROXY) += xt_TPROXY.o
-obj-$(CONFIG_NETFILTER_XT_TARGET_TCPMSS) += xt_TCPMSS.o
obj-$(CONFIG_NETFILTER_XT_TARGET_TCPOPTSTRIP) += xt_TCPOPTSTRIP.o
obj-$(CONFIG_NETFILTER_XT_TARGET_TEE) += xt_TEE.o
obj-$(CONFIG_NETFILTER_XT_TARGET_TRACE) += xt_TRACE.o
diff --git a/net/netfilter/xt_DSCP.c b/net/netfilter/xt_DSCP.c
deleted file mode 100644
index cfa44515a..000000000
--- a/net/netfilter/xt_DSCP.c
+++ /dev/null
@@ -1,161 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/* x_tables module for setting the IPv4/IPv6 DSCP field, Version 1.8
- *
- * (C) 2002 by Harald Welte <[email protected]>
- * based on ipt_FTOS.c (C) 2000 by Matthew G. Marsh <[email protected]>
- *
- * See RFC2474 for a description of the DSCP field within the IP Header.
-*/
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-#include <linux/module.h>
-#include <linux/skbuff.h>
-#include <linux/ip.h>
-#include <linux/ipv6.h>
-#include <net/dsfield.h>
-
-#include <linux/netfilter/x_tables.h>
-#include <linux/netfilter/xt_DSCP.h>
-
-MODULE_AUTHOR("Harald Welte <[email protected]>");
-MODULE_DESCRIPTION("Xtables: DSCP/TOS field modification");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("ipt_DSCP");
-MODULE_ALIAS("ip6t_DSCP");
-MODULE_ALIAS("ipt_TOS");
-MODULE_ALIAS("ip6t_TOS");
-
-#define XT_DSCP_ECN_MASK 3u
-
-static unsigned int
-dscp_tg(struct sk_buff *skb, const struct xt_action_param *par)
-{
- const struct xt_DSCP_info *dinfo = par->targinfo;
- u_int8_t dscp = ipv4_get_dsfield(ip_hdr(skb)) >> XT_DSCP_SHIFT;
-
- if (dscp != dinfo->dscp) {
- if (skb_ensure_writable(skb, sizeof(struct iphdr)))
- return NF_DROP;
-
- ipv4_change_dsfield(ip_hdr(skb), XT_DSCP_ECN_MASK,
- dinfo->dscp << XT_DSCP_SHIFT);
-
- }
- return XT_CONTINUE;
-}
-
-static unsigned int
-dscp_tg6(struct sk_buff *skb, const struct xt_action_param *par)
-{
- const struct xt_DSCP_info *dinfo = par->targinfo;
- u_int8_t dscp = ipv6_get_dsfield(ipv6_hdr(skb)) >> XT_DSCP_SHIFT;
-
- if (dscp != dinfo->dscp) {
- if (skb_ensure_writable(skb, sizeof(struct ipv6hdr)))
- return NF_DROP;
-
- ipv6_change_dsfield(ipv6_hdr(skb), XT_DSCP_ECN_MASK,
- dinfo->dscp << XT_DSCP_SHIFT);
- }
- return XT_CONTINUE;
-}
-
-static int dscp_tg_check(const struct xt_tgchk_param *par)
-{
- const struct xt_DSCP_info *info = par->targinfo;
-
- if (info->dscp > XT_DSCP_MAX)
- return -EDOM;
- return 0;
-}
-
-static unsigned int
-tos_tg(struct sk_buff *skb, const struct xt_action_param *par)
-{
- const struct xt_tos_target_info *info = par->targinfo;
- struct iphdr *iph = ip_hdr(skb);
- u_int8_t orig, nv;
-
- orig = ipv4_get_dsfield(iph);
- nv = (orig & ~info->tos_mask) ^ info->tos_value;
-
- if (orig != nv) {
- if (skb_ensure_writable(skb, sizeof(struct iphdr)))
- return NF_DROP;
- iph = ip_hdr(skb);
- ipv4_change_dsfield(iph, 0, nv);
- }
-
- return XT_CONTINUE;
-}
-
-static unsigned int
-tos_tg6(struct sk_buff *skb, const struct xt_action_param *par)
-{
- const struct xt_tos_target_info *info = par->targinfo;
- struct ipv6hdr *iph = ipv6_hdr(skb);
- u_int8_t orig, nv;
-
- orig = ipv6_get_dsfield(iph);
- nv = (orig & ~info->tos_mask) ^ info->tos_value;
-
- if (orig != nv) {
- if (skb_ensure_writable(skb, sizeof(struct iphdr)))
- return NF_DROP;
- iph = ipv6_hdr(skb);
- ipv6_change_dsfield(iph, 0, nv);
- }
-
- return XT_CONTINUE;
-}
-
-static struct xt_target dscp_tg_reg[] __read_mostly = {
- {
- .name = "DSCP",
- .family = NFPROTO_IPV4,
- .checkentry = dscp_tg_check,
- .target = dscp_tg,
- .targetsize = sizeof(struct xt_DSCP_info),
- .table = "mangle",
- .me = THIS_MODULE,
- },
- {
- .name = "DSCP",
- .family = NFPROTO_IPV6,
- .checkentry = dscp_tg_check,
- .target = dscp_tg6,
- .targetsize = sizeof(struct xt_DSCP_info),
- .table = "mangle",
- .me = THIS_MODULE,
- },
- {
- .name = "TOS",
- .revision = 1,
- .family = NFPROTO_IPV4,
- .table = "mangle",
- .target = tos_tg,
- .targetsize = sizeof(struct xt_tos_target_info),
- .me = THIS_MODULE,
- },
- {
- .name = "TOS",
- .revision = 1,
- .family = NFPROTO_IPV6,
- .table = "mangle",
- .target = tos_tg6,
- .targetsize = sizeof(struct xt_tos_target_info),
- .me = THIS_MODULE,
- },
-};
-
-static int __init dscp_tg_init(void)
-{
- return xt_register_targets(dscp_tg_reg, ARRAY_SIZE(dscp_tg_reg));
-}
-
-static void __exit dscp_tg_exit(void)
-{
- xt_unregister_targets(dscp_tg_reg, ARRAY_SIZE(dscp_tg_reg));
-}
-
-module_init(dscp_tg_init);
-module_exit(dscp_tg_exit);
diff --git a/net/netfilter/xt_HL.c b/net/netfilter/xt_HL.c
deleted file mode 100644
index 7873b834c..000000000
--- a/net/netfilter/xt_HL.c
+++ /dev/null
@@ -1,159 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * TTL modification target for IP tables
- * (C) 2000,2005 by Harald Welte <[email protected]>
- *
- * Hop Limit modification target for ip6tables
- * Maciej Soltysiak <[email protected]>
- */
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-#include <linux/module.h>
-#include <linux/skbuff.h>
-#include <linux/ip.h>
-#include <linux/ipv6.h>
-#include <net/checksum.h>
-
-#include <linux/netfilter/x_tables.h>
-#include <linux/netfilter_ipv4/ipt_TTL.h>
-#include <linux/netfilter_ipv6/ip6t_HL.h>
-
-MODULE_AUTHOR("Harald Welte <[email protected]>");
-MODULE_AUTHOR("Maciej Soltysiak <[email protected]>");
-MODULE_DESCRIPTION("Xtables: Hoplimit/TTL Limit field modification target");
-MODULE_LICENSE("GPL");
-
-static unsigned int
-ttl_tg(struct sk_buff *skb, const struct xt_action_param *par)
-{
- struct iphdr *iph;
- const struct ipt_TTL_info *info = par->targinfo;
- int new_ttl;
-
- if (skb_ensure_writable(skb, sizeof(*iph)))
- return NF_DROP;
-
- iph = ip_hdr(skb);
-
- switch (info->mode) {
- case IPT_TTL_SET:
- new_ttl = info->ttl;
- break;
- case IPT_TTL_INC:
- new_ttl = iph->ttl + info->ttl;
- if (new_ttl > 255)
- new_ttl = 255;
- break;
- case IPT_TTL_DEC:
- new_ttl = iph->ttl - info->ttl;
- if (new_ttl < 0)
- new_ttl = 0;
- break;
- default:
- new_ttl = iph->ttl;
- break;
- }
-
- if (new_ttl != iph->ttl) {
- csum_replace2(&iph->check, htons(iph->ttl << 8),
- htons(new_ttl << 8));
- iph->ttl = new_ttl;
- }
-
- return XT_CONTINUE;
-}
-
-static unsigned int
-hl_tg6(struct sk_buff *skb, const struct xt_action_param *par)
-{
- struct ipv6hdr *ip6h;
- const struct ip6t_HL_info *info = par->targinfo;
- int new_hl;
-
- if (skb_ensure_writable(skb, sizeof(*ip6h)))
- return NF_DROP;
-
- ip6h = ipv6_hdr(skb);
-
- switch (info->mode) {
- case IP6T_HL_SET:
- new_hl = info->hop_limit;
- break;
- case IP6T_HL_INC:
- new_hl = ip6h->hop_limit + info->hop_limit;
- if (new_hl > 255)
- new_hl = 255;
- break;
- case IP6T_HL_DEC:
- new_hl = ip6h->hop_limit - info->hop_limit;
- if (new_hl < 0)
- new_hl = 0;
- break;
- default:
- new_hl = ip6h->hop_limit;
- break;
- }
-
- ip6h->hop_limit = new_hl;
-
- return XT_CONTINUE;
-}
-
-static int ttl_tg_check(const struct xt_tgchk_param *par)
-{
- const struct ipt_TTL_info *info = par->targinfo;
-
- if (info->mode > IPT_TTL_MAXMODE)
- return -EINVAL;
- if (info->mode != IPT_TTL_SET && info->ttl == 0)
- return -EINVAL;
- return 0;
-}
-
-static int hl_tg6_check(const struct xt_tgchk_param *par)
-{
- const struct ip6t_HL_info *info = par->targinfo;
-
- if (info->mode > IP6T_HL_MAXMODE)
- return -EINVAL;
- if (info->mode != IP6T_HL_SET && info->hop_limit == 0)
- return -EINVAL;
- return 0;
-}
-
-static struct xt_target hl_tg_reg[] __read_mostly = {
- {
- .name = "TTL",
- .revision = 0,
- .family = NFPROTO_IPV4,
- .target = ttl_tg,
- .targetsize = sizeof(struct ipt_TTL_info),
- .table = "mangle",
- .checkentry = ttl_tg_check,
- .me = THIS_MODULE,
- },
- {
- .name = "HL",
- .revision = 0,
- .family = NFPROTO_IPV6,
- .target = hl_tg6,
- .targetsize = sizeof(struct ip6t_HL_info),
- .table = "mangle",
- .checkentry = hl_tg6_check,
- .me = THIS_MODULE,
- },
-};
-
-static int __init hl_tg_init(void)
-{
- return xt_register_targets(hl_tg_reg, ARRAY_SIZE(hl_tg_reg));
-}
-
-static void __exit hl_tg_exit(void)
-{
- xt_unregister_targets(hl_tg_reg, ARRAY_SIZE(hl_tg_reg));
-}
-
-module_init(hl_tg_init);
-module_exit(hl_tg_exit);
-MODULE_ALIAS("ipt_TTL");
-MODULE_ALIAS("ip6t_HL");
diff --git a/net/netfilter/xt_RATEEST.c b/net/netfilter/xt_RATEEST.c
deleted file mode 100644
index 80f6624e2..000000000
--- a/net/netfilter/xt_RATEEST.c
+++ /dev/null
@@ -1,233 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * (C) 2007 Patrick McHardy <[email protected]>
- */
-#include <linux/module.h>
-#include <linux/skbuff.h>
-#include <linux/gen_stats.h>
-#include <linux/jhash.h>
-#include <linux/rtnetlink.h>
-#include <linux/random.h>
-#include <linux/slab.h>
-#include <net/gen_stats.h>
-#include <net/netlink.h>
-#include <net/netns/generic.h>
-
-#include <linux/netfilter/x_tables.h>
-#include <linux/netfilter/xt_RATEEST.h>
-#include <net/netfilter/xt_rateest.h>
-
-#define RATEEST_HSIZE 16
-
-struct xt_rateest_net {
- struct mutex hash_lock;
- struct hlist_head hash[RATEEST_HSIZE];
-};
-
-static unsigned int xt_rateest_id;
-
-static unsigned int jhash_rnd __read_mostly;
-
-static unsigned int xt_rateest_hash(const char *name)
-{
- return jhash(name, sizeof_field(struct xt_rateest, name), jhash_rnd) &
- (RATEEST_HSIZE - 1);
-}
-
-static void xt_rateest_hash_insert(struct xt_rateest_net *xn,
- struct xt_rateest *est)
-{
- unsigned int h;
-
- h = xt_rateest_hash(est->name);
- hlist_add_head(&est->list, &xn->hash[h]);
-}
-
-static struct xt_rateest *__xt_rateest_lookup(struct xt_rateest_net *xn,
- const char *name)
-{
- struct xt_rateest *est;
- unsigned int h;
-
- h = xt_rateest_hash(name);
- hlist_for_each_entry(est, &xn->hash[h], list) {
- if (strcmp(est->name, name) == 0) {
- est->refcnt++;
- return est;
- }
- }
-
- return NULL;
-}
-
-struct xt_rateest *xt_rateest_lookup(struct net *net, const char *name)
-{
- struct xt_rateest_net *xn = net_generic(net, xt_rateest_id);
- struct xt_rateest *est;
-
- mutex_lock(&xn->hash_lock);
- est = __xt_rateest_lookup(xn, name);
- mutex_unlock(&xn->hash_lock);
- return est;
-}
-EXPORT_SYMBOL_GPL(xt_rateest_lookup);
-
-void xt_rateest_put(struct net *net, struct xt_rateest *est)
-{
- struct xt_rateest_net *xn = net_generic(net, xt_rateest_id);
-
- mutex_lock(&xn->hash_lock);
- if (--est->refcnt == 0) {
- hlist_del(&est->list);
- gen_kill_estimator(&est->rate_est);
- /*
- * gen_estimator est_timer() might access est->lock or bstats,
- * wait a RCU grace period before freeing 'est'
- */
- kfree_rcu(est, rcu);
- }
- mutex_unlock(&xn->hash_lock);
-}
-EXPORT_SYMBOL_GPL(xt_rateest_put);
-
-static unsigned int
-xt_rateest_tg(struct sk_buff *skb, const struct xt_action_param *par)
-{
- const struct xt_rateest_target_info *info = par->targinfo;
- struct gnet_stats_basic_sync *stats = &info->est->bstats;
-
- spin_lock_bh(&info->est->lock);
- u64_stats_add(&stats->bytes, skb->len);
- u64_stats_inc(&stats->packets);
- spin_unlock_bh(&info->est->lock);
-
- return XT_CONTINUE;
-}
-
-static int xt_rateest_tg_checkentry(const struct xt_tgchk_param *par)
-{
- struct xt_rateest_net *xn = net_generic(par->net, xt_rateest_id);
- struct xt_rateest_target_info *info = par->targinfo;
- struct xt_rateest *est;
- struct {
- struct nlattr opt;
- struct gnet_estimator est;
- } cfg;
- int ret;
-
- if (strnlen(info->name, sizeof(est->name)) >= sizeof(est->name))
- return -ENAMETOOLONG;
-
- net_get_random_once(&jhash_rnd, sizeof(jhash_rnd));
-
- mutex_lock(&xn->hash_lock);
- est = __xt_rateest_lookup(xn, info->name);
- if (est) {
- mutex_unlock(&xn->hash_lock);
- /*
- * If estimator parameters are specified, they must match the
- * existing estimator.
- */
- if ((!info->interval && !info->ewma_log) ||
- (info->interval != est->params.interval ||
- info->ewma_log != est->params.ewma_log)) {
- xt_rateest_put(par->net, est);
- return -EINVAL;
- }
- info->est = est;
- return 0;
- }
-
- ret = -ENOMEM;
- est = kzalloc(sizeof(*est), GFP_KERNEL);
- if (!est)
- goto err1;
-
- gnet_stats_basic_sync_init(&est->bstats);
- strscpy(est->name, info->name, sizeof(est->name));
- spin_lock_init(&est->lock);
- est->refcnt = 1;
- est->params.interval = info->interval;
- est->params.ewma_log = info->ewma_log;
-
- cfg.opt.nla_len = nla_attr_size(sizeof(cfg.est));
- cfg.opt.nla_type = TCA_STATS_RATE_EST;
- cfg.est.interval = info->interval;
- cfg.est.ewma_log = info->ewma_log;
-
- ret = gen_new_estimator(&est->bstats, NULL, &est->rate_est,
- &est->lock, NULL, &cfg.opt);
- if (ret < 0)
- goto err2;
-
- info->est = est;
- xt_rateest_hash_insert(xn, est);
- mutex_unlock(&xn->hash_lock);
- return 0;
-
-err2:
- kfree(est);
-err1:
- mutex_unlock(&xn->hash_lock);
- return ret;
-}
-
-static void xt_rateest_tg_destroy(const struct xt_tgdtor_param *par)
-{
- struct xt_rateest_target_info *info = par->targinfo;
-
- xt_rateest_put(par->net, info->est);
-}
-
-static struct xt_target xt_rateest_tg_reg __read_mostly = {
- .name = "RATEEST",
- .revision = 0,
- .family = NFPROTO_UNSPEC,
- .target = xt_rateest_tg,
- .checkentry = xt_rateest_tg_checkentry,
- .destroy = xt_rateest_tg_destroy,
- .targetsize = sizeof(struct xt_rateest_target_info),
- .usersize = offsetof(struct xt_rateest_target_info, est),
- .me = THIS_MODULE,
-};
-
-static __net_init int xt_rateest_net_init(struct net *net)
-{
- struct xt_rateest_net *xn = net_generic(net, xt_rateest_id);
- int i;
-
- mutex_init(&xn->hash_lock);
- for (i = 0; i < ARRAY_SIZE(xn->hash); i++)
- INIT_HLIST_HEAD(&xn->hash[i]);
- return 0;
-}
-
-static struct pernet_operations xt_rateest_net_ops = {
- .init = xt_rateest_net_init,
- .id = &xt_rateest_id,
- .size = sizeof(struct xt_rateest_net),
-};
-
-static int __init xt_rateest_tg_init(void)
-{
- int err = register_pernet_subsys(&xt_rateest_net_ops);
-
- if (err)
- return err;
- return xt_register_target(&xt_rateest_tg_reg);
-}
-
-static void __exit xt_rateest_tg_fini(void)
-{
- xt_unregister_target(&xt_rateest_tg_reg);
- unregister_pernet_subsys(&xt_rateest_net_ops);
-}
-
-
-MODULE_AUTHOR("Patrick McHardy <[email protected]>");
-MODULE_LICENSE("GPL");
-MODULE_DESCRIPTION("Xtables: packet rate estimator");
-MODULE_ALIAS("ipt_RATEEST");
-MODULE_ALIAS("ip6t_RATEEST");
-module_init(xt_rateest_tg_init);
-module_exit(xt_rateest_tg_fini);
diff --git a/net/netfilter/xt_TCPMSS.c b/net/netfilter/xt_TCPMSS.c
deleted file mode 100644
index 116a885ad..000000000
--- a/net/netfilter/xt_TCPMSS.c
+++ /dev/null
@@ -1,345 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * This is a module which is used for setting the MSS option in TCP packets.
- *
- * Copyright (C) 2000 Marc Boucher <[email protected]>
- * Copyright (C) 2007 Patrick McHardy <[email protected]>
- */
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-#include <linux/module.h>
-#include <linux/skbuff.h>
-#include <linux/ip.h>
-#include <linux/gfp.h>
-#include <linux/ipv6.h>
-#include <linux/tcp.h>
-#include <net/dst.h>
-#include <net/flow.h>
-#include <net/ipv6.h>
-#include <net/route.h>
-#include <net/tcp.h>
-
-#include <linux/netfilter_ipv4/ip_tables.h>
-#include <linux/netfilter_ipv6/ip6_tables.h>
-#include <linux/netfilter/x_tables.h>
-#include <linux/netfilter/xt_tcpudp.h>
-#include <linux/netfilter/xt_TCPMSS.h>
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Marc Boucher <[email protected]>");
-MODULE_DESCRIPTION("Xtables: TCP Maximum Segment Size (MSS) adjustment");
-MODULE_ALIAS("ipt_TCPMSS");
-MODULE_ALIAS("ip6t_TCPMSS");
-
-static inline unsigned int
-optlen(const u_int8_t *opt, unsigned int offset)
-{
- /* Beware zero-length options: make finite progress */
- if (opt[offset] <= TCPOPT_NOP || opt[offset+1] == 0)
- return 1;
- else
- return opt[offset+1];
-}
-
-static u_int32_t tcpmss_reverse_mtu(struct net *net,
- const struct sk_buff *skb,
- unsigned int family)
-{
- struct flowi fl;
- struct rtable *rt = NULL;
- u_int32_t mtu = ~0U;
-
- if (family == PF_INET) {
- struct flowi4 *fl4 = &fl.u.ip4;
- memset(fl4, 0, sizeof(*fl4));
- fl4->daddr = ip_hdr(skb)->saddr;
- } else {
- struct flowi6 *fl6 = &fl.u.ip6;
-
- memset(fl6, 0, sizeof(*fl6));
- fl6->daddr = ipv6_hdr(skb)->saddr;
- }
-
- nf_route(net, (struct dst_entry **)&rt, &fl, false, family);
- if (rt != NULL) {
- mtu = dst_mtu(&rt->dst);
- dst_release(&rt->dst);
- }
- return mtu;
-}
-
-static int
-tcpmss_mangle_packet(struct sk_buff *skb,
- const struct xt_action_param *par,
- unsigned int family,
- unsigned int tcphoff,
- unsigned int minlen)
-{
- const struct xt_tcpmss_info *info = par->targinfo;
- struct tcphdr *tcph;
- int len, tcp_hdrlen;
- unsigned int i;
- __be16 oldval;
- u16 newmss;
- u8 *opt;
-
- /* This is a fragment, no TCP header is available */
- if (par->fragoff != 0)
- return 0;
-
- if (skb_ensure_writable(skb, skb->len))
- return -1;
-
- len = skb->len - tcphoff;
- if (len < (int)sizeof(struct tcphdr))
- return -1;
-
- tcph = (struct tcphdr *)(skb_network_header(skb) + tcphoff);
- tcp_hdrlen = tcph->doff * 4;
-
- if (len < tcp_hdrlen || tcp_hdrlen < sizeof(struct tcphdr))
- return -1;
-
- if (info->mss == XT_TCPMSS_CLAMP_PMTU) {
- struct net *net = xt_net(par);
- unsigned int in_mtu = tcpmss_reverse_mtu(net, skb, family);
- unsigned int min_mtu = min(dst_mtu(skb_dst(skb)), in_mtu);
-
- if (min_mtu <= minlen) {
- net_err_ratelimited("unknown or invalid path-MTU (%u)\n",
- min_mtu);
- return -1;
- }
- newmss = min_mtu - minlen;
- } else
- newmss = info->mss;
-
- opt = (u_int8_t *)tcph;
- for (i = sizeof(struct tcphdr); i <= tcp_hdrlen - TCPOLEN_MSS; i
+= optlen(opt, i)) {
- if (opt[i] == TCPOPT_MSS && opt[i+1] == TCPOLEN_MSS) {
- u_int16_t oldmss;
-
- oldmss = (opt[i+2] << 8) | opt[i+3];
-
- /* Never increase MSS, even when setting it, as
- * doing so results in problems for hosts that rely
- * on MSS being set correctly.
- */
- if (oldmss <= newmss)
- return 0;
-
- opt[i+2] = (newmss & 0xff00) >> 8;
- opt[i+3] = newmss & 0x00ff;
-
- inet_proto_csum_replace2(&tcph->check, skb,
- htons(oldmss), htons(newmss),
- false);
- return 0;
- }
- }
-
- /* There is data after the header so the option can't be added
- * without moving it, and doing so may make the SYN packet
- * itself too large. Accept the packet unmodified instead.
- */
- if (len > tcp_hdrlen)
- return 0;
-
- /* tcph->doff has 4 bits, do not wrap it to 0 */
- if (tcp_hdrlen >= 15 * 4)
- return 0;
-
- /*
- * MSS Option not found ?! add it..
- */
- if (skb_tailroom(skb) < TCPOLEN_MSS) {
- if (pskb_expand_head(skb, 0,
- TCPOLEN_MSS - skb_tailroom(skb),
- GFP_ATOMIC))
- return -1;
- tcph = (struct tcphdr *)(skb_network_header(skb) + tcphoff);
- }
-
- skb_put(skb, TCPOLEN_MSS);
-
- /*
- * IPv4: RFC 1122 states "If an MSS option is not received at
- * connection setup, TCP MUST assume a default send MSS of 536".
- * IPv6: RFC 2460 states IPv6 has a minimum MTU of 1280 and a minimum
- * length IPv6 header of 60, ergo the default MSS value is 1220
- * Since no MSS was provided, we must use the default values
- */
- if (xt_family(par) == NFPROTO_IPV4)
- newmss = min(newmss, (u16)536);
- else
- newmss = min(newmss, (u16)1220);
-
- opt = (u_int8_t *)tcph + sizeof(struct tcphdr);
- memmove(opt + TCPOLEN_MSS, opt, len - sizeof(struct tcphdr));
-
- inet_proto_csum_replace2(&tcph->check, skb,
- htons(len), htons(len + TCPOLEN_MSS), true);
- opt[0] = TCPOPT_MSS;
- opt[1] = TCPOLEN_MSS;
- opt[2] = (newmss & 0xff00) >> 8;
- opt[3] = newmss & 0x00ff;
-
- inet_proto_csum_replace4(&tcph->check, skb, 0, *((__be32 *)opt), false);
-
- oldval = ((__be16 *)tcph)[6];
- tcph->doff += TCPOLEN_MSS/4;
- inet_proto_csum_replace2(&tcph->check, skb,
- oldval, ((__be16 *)tcph)[6], false);
- return TCPOLEN_MSS;
-}
-
-static unsigned int
-tcpmss_tg4(struct sk_buff *skb, const struct xt_action_param *par)
-{
- struct iphdr *iph = ip_hdr(skb);
- __be16 newlen;
- int ret;
-
- ret = tcpmss_mangle_packet(skb, par,
- PF_INET,
- iph->ihl * 4,
- sizeof(*iph) + sizeof(struct tcphdr));
- if (ret < 0)
- return NF_DROP;
- if (ret > 0) {
- iph = ip_hdr(skb);
- newlen = htons(ntohs(iph->tot_len) + ret);
- csum_replace2(&iph->check, iph->tot_len, newlen);
- iph->tot_len = newlen;
- }
- return XT_CONTINUE;
-}
-
-#if IS_ENABLED(CONFIG_IP6_NF_IPTABLES)
-static unsigned int
-tcpmss_tg6(struct sk_buff *skb, const struct xt_action_param *par)
-{
- struct ipv6hdr *ipv6h = ipv6_hdr(skb);
- u8 nexthdr;
- __be16 frag_off, oldlen, newlen;
- int tcphoff;
- int ret;
-
- nexthdr = ipv6h->nexthdr;
- tcphoff = ipv6_skip_exthdr(skb, sizeof(*ipv6h), &nexthdr, &frag_off);
- if (tcphoff < 0)
- return NF_DROP;
- ret = tcpmss_mangle_packet(skb, par,
- PF_INET6,
- tcphoff,
- sizeof(*ipv6h) + sizeof(struct tcphdr));
- if (ret < 0)
- return NF_DROP;
- if (ret > 0) {
- ipv6h = ipv6_hdr(skb);
- oldlen = ipv6h->payload_len;
- newlen = htons(ntohs(oldlen) + ret);
- if (skb->ip_summed == CHECKSUM_COMPLETE)
- skb->csum = csum_add(csum_sub(skb->csum, (__force __wsum)oldlen),
- (__force __wsum)newlen);
- ipv6h->payload_len = newlen;
- }
- return XT_CONTINUE;
-}
-#endif
-
-/* Must specify -p tcp --syn */
-static inline bool find_syn_match(const struct xt_entry_match *m)
-{
- const struct xt_tcp *tcpinfo = (const struct xt_tcp *)m->data;
-
- if (strcmp(m->u.kernel.match->name, "tcp") == 0 &&
- tcpinfo->flg_cmp & TCPHDR_SYN &&
- !(tcpinfo->invflags & XT_TCP_INV_FLAGS))
- return true;
-
- return false;
-}
-
-static int tcpmss_tg4_check(const struct xt_tgchk_param *par)
-{
- const struct xt_tcpmss_info *info = par->targinfo;
- const struct ipt_entry *e = par->entryinfo;
- const struct xt_entry_match *ematch;
-
- if (info->mss == XT_TCPMSS_CLAMP_PMTU &&
- (par->hook_mask & ~((1 << NF_INET_FORWARD) |
- (1 << NF_INET_LOCAL_OUT) |
- (1 << NF_INET_POST_ROUTING))) != 0) {
- pr_info_ratelimited("path-MTU clamping only supported in
FORWARD, OUTPUT and POSTROUTING hooks\n");
- return -EINVAL;
- }
- if (par->nft_compat)
- return 0;
-
- xt_ematch_foreach(ematch, e)
- if (find_syn_match(ematch))
- return 0;
- pr_info_ratelimited("Only works on TCP SYN packets\n");
- return -EINVAL;
-}
-
-#if IS_ENABLED(CONFIG_IP6_NF_IPTABLES)
-static int tcpmss_tg6_check(const struct xt_tgchk_param *par)
-{
- const struct xt_tcpmss_info *info = par->targinfo;
- const struct ip6t_entry *e = par->entryinfo;
- const struct xt_entry_match *ematch;
-
- if (info->mss == XT_TCPMSS_CLAMP_PMTU &&
- (par->hook_mask & ~((1 << NF_INET_FORWARD) |
- (1 << NF_INET_LOCAL_OUT) |
- (1 << NF_INET_POST_ROUTING))) != 0) {
- pr_info_ratelimited("path-MTU clamping only supported in
FORWARD, OUTPUT and POSTROUTING hooks\n");
- return -EINVAL;
- }
- if (par->nft_compat)
- return 0;
-
- xt_ematch_foreach(ematch, e)
- if (find_syn_match(ematch))
- return 0;
- pr_info_ratelimited("Only works on TCP SYN packets\n");
- return -EINVAL;
-}
-#endif
-
-static struct xt_target tcpmss_tg_reg[] __read_mostly = {
- {
- .family = NFPROTO_IPV4,
- .name = "TCPMSS",
- .checkentry = tcpmss_tg4_check,
- .target = tcpmss_tg4,
- .targetsize = sizeof(struct xt_tcpmss_info),
- .proto = IPPROTO_TCP,
- .me = THIS_MODULE,
- },
-#if IS_ENABLED(CONFIG_IP6_NF_IPTABLES)
- {
- .family = NFPROTO_IPV6,
- .name = "TCPMSS",
- .checkentry = tcpmss_tg6_check,
- .target = tcpmss_tg6,
- .targetsize = sizeof(struct xt_tcpmss_info),
- .proto = IPPROTO_TCP,
- .me = THIS_MODULE,
- },
-#endif
-};
-
-static int __init tcpmss_tg_init(void)
-{
- return xt_register_targets(tcpmss_tg_reg, ARRAY_SIZE(tcpmss_tg_reg));
-}
-
-static void __exit tcpmss_tg_exit(void)
-{
- xt_unregister_targets(tcpmss_tg_reg, ARRAY_SIZE(tcpmss_tg_reg));
-}
-
-module_init(tcpmss_tg_init);
-module_exit(tcpmss_tg_exit);
--
2.34.1
On Saturday 2023-12-16 20:22, Samuel Marks wrote:
>`git clone` fails on case-insensitive file systems, e.g., on Windows,
>MSYS, Cygwin due to case sensitive files. All but one are in
>netfilter, and they seem to be old code that isn't necessary.
>
> include/uapi/linux/netfilter/xt_CONNMARK.h | 7 -
> include/uapi/linux/netfilter/xt_DSCP.h | 27 --
> include/uapi/linux/netfilter/xt_MARK.h | 7 -
> include/uapi/linux/netfilter/xt_RATEEST.h | 17 -
> include/uapi/linux/netfilter/xt_TCPMSS.h | 13 -
> include/uapi/linux/netfilter_ipv4/ipt_ECN.h | 34 --
> include/uapi/linux/netfilter_ipv4/ipt_TTL.h | 24 --
> include/uapi/linux/netfilter_ipv6/ip6t_HL.h | 25 --
> net/netfilter/Makefile | 4 -
> net/netfilter/xt_DSCP.c | 161 ---------
> net/netfilter/xt_HL.c | 159 ---------
> net/netfilter/xt_RATEEST.c | 233 -------------
> net/netfilter/xt_TCPMSS.c | 345 --------------------
> 13 files changed, 1056 deletions(-)
> delete mode 100644 include/uapi/linux/netfilter/xt_CONNMARK.h
> delete mode 100644 include/uapi/linux/netfilter/xt_DSCP.h
> delete mode 100644 include/uapi/linux/netfilter/xt_MARK.h
> delete mode 100644 include/uapi/linux/netfilter/xt_RATEEST.h
> delete mode 100644 include/uapi/linux/netfilter/xt_TCPMSS.h
> delete mode 100644 include/uapi/linux/netfilter_ipv4/ipt_ECN.h
> delete mode 100644 include/uapi/linux/netfilter_ipv4/ipt_TTL.h
> delete mode 100644 include/uapi/linux/netfilter_ipv6/ip6t_HL.h
> delete mode 100644 net/netfilter/xt_DSCP.c
> delete mode 100644 net/netfilter/xt_HL.c
> delete mode 100644 net/netfilter/xt_RATEEST.c
> delete mode 100644 net/netfilter/xt_TCPMSS.c
Did you ever test this?
iptables -t mangle -A PREROUTING -i xyz0 -p tcp --syn -j TCPMSS --set-mss 1440
will now fail.
Hi,
On Sat, Dec 16, 2023 at 02:22:46PM -0500, Samuel Marks wrote:
> ---
> `git clone` fails on case-insensitive file systems, e.g., on Windows,
> MSYS, Cygwin due to case sensitive files. All but one are in
> netfilter, and they seem to be old code that isn't necessary.
A good one, sadly 105 days too early. ;)
Cheers, Phil