aboutsummaryrefslogtreecommitdiffstats
path: root/net/ipv6/netfilter/ip6t_HL.c
diff options
context:
space:
mode:
Diffstat (limited to 'net/ipv6/netfilter/ip6t_HL.c')
-rw-r--r--net/ipv6/netfilter/ip6t_HL.c95
1 files changed, 0 insertions, 95 deletions
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);