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authorJan Engelhardt <jengelh@medozas.de>2009-02-18 18:38:40 +0100
committerPatrick McHardy <kaber@trash.net>2009-02-18 18:38:40 +0100
commit563d36eb3fb22dd04da9aa6f12e1b9ba0ac115f3 (patch)
tree9ff10949c9382b98756fa8da6ded257f00249b84 /net/ipv6
parentddc214c43a923e89741e04da2f10e3037a64e222 (diff)
netfilter: Combine ipt_TTL and ip6t_HL source
Suggested by: James King <t.james.king@gmail.com> Similarly to commit c9fd49680954714473d6cbd2546d6ff120f96840, merge TTL and HL. Since HL does not depend on any IPv6-specific function, no new module dependencies would arise. With slight adjustments to the Kconfig help text. Signed-off-by: Jan Engelhardt <jengelh@medozas.de> Signed-off-by: Patrick McHardy <kaber@trash.net>
Diffstat (limited to 'net/ipv6')
-rw-r--r--net/ipv6/netfilter/Kconfig17
-rw-r--r--net/ipv6/netfilter/Makefile1
-rw-r--r--net/ipv6/netfilter/ip6t_HL.c95
3 files changed, 0 insertions, 113 deletions
diff --git a/net/ipv6/netfilter/Kconfig b/net/ipv6/netfilter/Kconfig
index 53ea512c4608..6a42a968c498 100644
--- a/net/ipv6/netfilter/Kconfig
+++ b/net/ipv6/netfilter/Kconfig
@@ -170,23 +170,6 @@ config IP6_NF_MANGLE
To compile it as a module, choose M here. If unsure, say N.
-config IP6_NF_TARGET_HL
- tristate 'HL (hoplimit) target support'
- depends on IP6_NF_MANGLE
- depends on NETFILTER_ADVANCED
- help
- This option adds a `HL' target, which enables the user to decrement
- the hoplimit value of the IPv6 header or set it to a given (lower)
- value.
-
- While it is safe to decrement the hoplimit value, this option also
- enables functionality to increment and set the hoplimit value of the
- IPv6 header to arbitrary values. This is EXTREMELY DANGEROUS since
- you can easily create immortal packets that loop forever on the
- network.
-
- To compile it as a module, choose M here. If unsure, say N.
-
config IP6_NF_RAW
tristate 'raw table support (required for TRACE)'
depends on NETFILTER_ADVANCED
diff --git a/net/ipv6/netfilter/Makefile b/net/ipv6/netfilter/Makefile
index 3f17c948eefb..61a4570d0ede 100644
--- a/net/ipv6/netfilter/Makefile
+++ b/net/ipv6/netfilter/Makefile
@@ -27,6 +27,5 @@ obj-$(CONFIG_IP6_NF_MATCH_OPTS) += ip6t_hbh.o
obj-$(CONFIG_IP6_NF_MATCH_RT) += ip6t_rt.o
# targets
-obj-$(CONFIG_IP6_NF_TARGET_HL) += ip6t_HL.o
obj-$(CONFIG_IP6_NF_TARGET_LOG) += ip6t_LOG.o
obj-$(CONFIG_IP6_NF_TARGET_REJECT) += ip6t_REJECT.o
diff --git a/net/ipv6/netfilter/ip6t_HL.c b/net/ipv6/netfilter/ip6t_HL.c
deleted file mode 100644
index 27b5adf670a2..000000000000
--- a/net/ipv6/netfilter/ip6t_HL.c
+++ /dev/null
@@ -1,95 +0,0 @@
-/*
- * Hop Limit modification target for ip6tables
- * Maciej Soltysiak <solt@dns.toxicfilms.tv>
- * Based on HW's TTL module
- *
- * This software is distributed under the terms of GNU GPL
- */
-
-#include <linux/module.h>
-#include <linux/skbuff.h>
-#include <linux/ip.h>
-#include <linux/ipv6.h>
-
-#include <linux/netfilter/x_tables.h>
-#include <linux/netfilter_ipv6/ip6t_HL.h>
-
-MODULE_AUTHOR("Maciej Soltysiak <solt@dns.toxicfilms.tv>");
-MODULE_DESCRIPTION("Xtables: IPv6 Hop Limit field modification target");
-MODULE_LICENSE("GPL");
-
-static unsigned int
-hl_tg6(struct sk_buff *skb, const struct xt_target_param *par)
-{
- struct ipv6hdr *ip6h;
- const struct ip6t_HL_info *info = par->targinfo;
- int new_hl;
-
- if (!skb_make_writable(skb, skb->len))
- 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 bool hl_tg6_check(const struct xt_tgchk_param *par)
-{
- const struct ip6t_HL_info *info = par->targinfo;
-
- if (info->mode > IP6T_HL_MAXMODE) {
- printk(KERN_WARNING "ip6t_HL: invalid or unknown Mode %u\n",
- info->mode);
- return false;
- }
- if (info->mode != IP6T_HL_SET && info->hop_limit == 0) {
- printk(KERN_WARNING "ip6t_HL: increment/decrement doesn't "
- "make sense with value 0\n");
- return false;
- }
- return true;
-}
-
-static struct xt_target hl_tg6_reg __read_mostly = {
- .name = "HL",
- .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_tg6_init(void)
-{
- return xt_register_target(&hl_tg6_reg);
-}
-
-static void __exit hl_tg6_exit(void)
-{
- xt_unregister_target(&hl_tg6_reg);
-}
-
-module_init(hl_tg6_init);
-module_exit(hl_tg6_exit);