+++ /dev/null
-/* Kernel module to match Hop-by-Hop and Destination parameters. */
-
-/* (C) 2001-2002 Andras Kis-Szabo <kisza@sch.bme.hu>
- *
- * 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/module.h>
-#include <linux/skbuff.h>
-#include <linux/ipv6.h>
-#include <linux/types.h>
-#include <net/checksum.h>
-#include <net/ipv6.h>
-
-#include <asm/byteorder.h>
-
-#include <linux/netfilter_ipv6/ip6_tables.h>
-#include <linux/netfilter_ipv6/ip6t_opts.h>
-
-#define HOPBYHOP 0
-
-MODULE_LICENSE("GPL");
-#if HOPBYHOP
-MODULE_DESCRIPTION("IPv6 HbH match");
-#else
-MODULE_DESCRIPTION("IPv6 DST match");
-#endif
-MODULE_AUTHOR("Andras Kis-Szabo <kisza@sch.bme.hu>");
-
-#if 0
-#define DEBUGP printk
-#else
-#define DEBUGP(format, args...)
-#endif
-
-/*
- * (Type & 0xC0) >> 6
- * 0 -> ignorable
- * 1 -> must drop the packet
- * 2 -> send ICMP PARM PROB regardless and drop packet
- * 3 -> Send ICMP if not a multicast address and drop packet
- * (Type & 0x20) >> 5
- * 0 -> invariant
- * 1 -> can change the routing
- * (Type & 0x1F) Type
- * 0 -> Pad1 (only 1 byte!)
- * 1 -> PadN LENGTH info (total length = length + 2)
- * C0 | 2 -> JUMBO 4 x x x x ( xxxx > 64k )
- * 5 -> RTALERT 2 x x
- */
-
-static int
-match(const struct sk_buff *skb,
- const struct net_device *in,
- const struct net_device *out,
- const struct xt_match *match,
- const void *matchinfo,
- int offset,
- unsigned int protoff,
- int *hotdrop)
-{
- struct ipv6_opt_hdr _optsh, *oh;
- const struct ip6t_opts *optinfo = matchinfo;
- unsigned int temp;
- unsigned int ptr;
- unsigned int hdrlen = 0;
- unsigned int ret = 0;
- u8 _opttype, *tp = NULL;
- u8 _optlen, *lp = NULL;
- unsigned int optlen;
-
-#if HOPBYHOP
- if (ipv6_find_hdr(skb, &ptr, NEXTHDR_HOP, NULL) < 0)
-#else
- if (ipv6_find_hdr(skb, &ptr, NEXTHDR_DEST, NULL) < 0)
-#endif
- return 0;
-
- oh = skb_header_pointer(skb, ptr, sizeof(_optsh), &_optsh);
- if (oh == NULL) {
- *hotdrop = 1;
- return 0;
- }
-
- hdrlen = ipv6_optlen(oh);
- if (skb->len - ptr < hdrlen) {
- /* Packet smaller than it's length field */
- return 0;
- }
-
- DEBUGP("IPv6 OPTS LEN %u %u ", hdrlen, oh->hdrlen);
-
- DEBUGP("len %02X %04X %02X ",
- optinfo->hdrlen, hdrlen,
- (!(optinfo->flags & IP6T_OPTS_LEN) ||
- ((optinfo->hdrlen == hdrlen) ^
- !!(optinfo->invflags & IP6T_OPTS_INV_LEN))));
-
- ret = (oh != NULL) &&
- (!(optinfo->flags & IP6T_OPTS_LEN) ||
- ((optinfo->hdrlen == hdrlen) ^
- !!(optinfo->invflags & IP6T_OPTS_INV_LEN)));
-
- ptr += 2;
- hdrlen -= 2;
- if (!(optinfo->flags & IP6T_OPTS_OPTS)) {
- return ret;
- } else if (optinfo->flags & IP6T_OPTS_NSTRICT) {
- DEBUGP("Not strict - not implemented");
- } else {
- DEBUGP("Strict ");
- DEBUGP("#%d ", optinfo->optsnr);
- for (temp = 0; temp < optinfo->optsnr; temp++) {
- /* type field exists ? */
- if (hdrlen < 1)
- break;
- tp = skb_header_pointer(skb, ptr, sizeof(_opttype),
- &_opttype);
- if (tp == NULL)
- break;
-
- /* Type check */
- if (*tp != (optinfo->opts[temp] & 0xFF00) >> 8) {
- DEBUGP("Tbad %02X %02X\n",
- *tp,
- (optinfo->opts[temp] & 0xFF00) >> 8);
- return 0;
- } else {
- DEBUGP("Tok ");
- }
- /* Length check */
- if (*tp) {
- u16 spec_len;
-
- /* length field exists ? */
- if (hdrlen < 2)
- break;
- lp = skb_header_pointer(skb, ptr + 1,
- sizeof(_optlen),
- &_optlen);
- if (lp == NULL)
- break;
- spec_len = optinfo->opts[temp] & 0x00FF;
-
- if (spec_len != 0x00FF && spec_len != *lp) {
- DEBUGP("Lbad %02X %04X\n", *lp,
- spec_len);
- return 0;
- }
- DEBUGP("Lok ");
- optlen = *lp + 2;
- } else {
- DEBUGP("Pad1\n");
- optlen = 1;
- }
-
- /* Step to the next */
- DEBUGP("len%04X \n", optlen);
-
- if ((ptr > skb->len - optlen || hdrlen < optlen) &&
- (temp < optinfo->optsnr - 1)) {
- DEBUGP("new pointer is too large! \n");
- break;
- }
- ptr += optlen;
- hdrlen -= optlen;
- }
- if (temp == optinfo->optsnr)
- return ret;
- else
- return 0;
- }
-
- return 0;
-}
-
-/* Called when user tries to insert an entry of this type. */
-static int
-checkentry(const char *tablename,
- const void *info,
- const struct xt_match *match,
- void *matchinfo,
- unsigned int hook_mask)
-{
- const struct ip6t_opts *optsinfo = matchinfo;
-
- if (optsinfo->invflags & ~IP6T_OPTS_INV_MASK) {
- DEBUGP("ip6t_opts: unknown flags %X\n", optsinfo->invflags);
- return 0;
- }
- return 1;
-}
-
-static struct ip6t_match opts_match = {
-#if HOPBYHOP
- .name = "hbh",
-#else
- .name = "dst",
-#endif
- .match = match,
- .matchsize = sizeof(struct ip6t_opts),
- .checkentry = checkentry,
- .me = THIS_MODULE,
-};
-
-static int __init ip6t_dst_init(void)
-{
- return ip6t_register_match(&opts_match);
-}
-
-static void __exit ip6t_dst_fini(void)
-{
- ip6t_unregister_match(&opts_match);
-}
-
-module_init(ip6t_dst_init);
-module_exit(ip6t_dst_fini);
#include <linux/netfilter_ipv6/ip6_tables.h>
#include <linux/netfilter_ipv6/ip6t_opts.h>
-#define HOPBYHOP 1
-
MODULE_LICENSE("GPL");
-#if HOPBYHOP
-MODULE_DESCRIPTION("IPv6 HbH match");
-#else
-MODULE_DESCRIPTION("IPv6 DST match");
-#endif
+MODULE_DESCRIPTION("IPv6 opts match");
MODULE_AUTHOR("Andras Kis-Szabo <kisza@sch.bme.hu>");
+MODULE_ALIAS("ip6t_dst");
#if 0
#define DEBUGP printk
u8 _optlen, *lp = NULL;
unsigned int optlen;
-#if HOPBYHOP
- if (ipv6_find_hdr(skb, &ptr, NEXTHDR_HOP, NULL) < 0)
-#else
- if (ipv6_find_hdr(skb, &ptr, NEXTHDR_DEST, NULL) < 0)
-#endif
+ if (ipv6_find_hdr(skb, &ptr, match->data, NULL) < 0)
return 0;
oh = skb_header_pointer(skb, ptr, sizeof(_optsh), &_optsh);
return 1;
}
-static struct ip6t_match opts_match = {
-#if HOPBYHOP
- .name = "hbh",
-#else
- .name = "dst",
-#endif
- .match = match,
- .matchsize = sizeof(struct ip6t_opts),
- .checkentry = checkentry,
- .me = THIS_MODULE,
+static struct xt_match opts_match[] = {
+ {
+ .name = "hbh",
+ .family = AF_INET6,
+ .match = match,
+ .matchsize = sizeof(struct ip6t_opts),
+ .checkentry = checkentry,
+ .me = THIS_MODULE,
+ .data = NEXTHDR_HOP,
+ },
+ {
+ .name = "dst",
+ .family = AF_INET6,
+ .match = match,
+ .matchsize = sizeof(struct ip6t_opts),
+ .checkentry = checkentry,
+ .me = THIS_MODULE,
+ .data = NEXTHDR_DEST,
+ },
};
static int __init ip6t_hbh_init(void)
{
- return ip6t_register_match(&opts_match);
+ return xt_register_matches(opts_match, ARRAY_SIZE(opts_match));
}
static void __exit ip6t_hbh_fini(void)
{
- ip6t_unregister_match(&opts_match);
+ xt_unregister_matches(opts_match, ARRAY_SIZE(opts_match));
}
module_init(ip6t_hbh_init);
projects / GitHub / moto-9609 / android_kernel_motorola_exynos9610.git / commitdiff