Release 4.8 net/bridge/netfilter/ebt_ip6.c
/*
* ebt_ip6
*
* Authors:
* Manohar Castelino <manohar.r.castelino@intel.com>
* Kuo-Lang Tseng <kuo-lang.tseng@intel.com>
* Jan Engelhardt <jengelh@medozas.de>
*
* Summary:
* This is just a modification of the IPv4 code written by
* Bart De Schuymer <bdschuym@pandora.be>
* with the changes required to support IPv6
*
* Jan, 2008
*/
#include <linux/ipv6.h>
#include <net/ipv6.h>
#include <linux/in.h>
#include <linux/module.h>
#include <net/dsfield.h>
#include <linux/netfilter/x_tables.h>
#include <linux/netfilter_bridge/ebtables.h>
#include <linux/netfilter_bridge/ebt_ip6.h>
union pkthdr {
struct {
__be16 src;
__be16 dst;
}
tcpudphdr;
struct {
u8 type;
u8 code;
}
icmphdr;
};
static bool
ebt_ip6_mt(const struct sk_buff *skb, struct xt_action_param *par)
{
const struct ebt_ip6_info *info = par->matchinfo;
const struct ipv6hdr *ih6;
struct ipv6hdr _ip6h;
const union pkthdr *pptr;
union pkthdr _pkthdr;
ih6 = skb_header_pointer(skb, 0, sizeof(_ip6h), &_ip6h);
if (ih6 == NULL)
return false;
if ((info->bitmask & EBT_IP6_TCLASS) &&
NF_INVF(info, EBT_IP6_TCLASS,
info->tclass != ipv6_get_dsfield(ih6)))
return false;
if (((info->bitmask & EBT_IP6_SOURCE) &&
NF_INVF(info, EBT_IP6_SOURCE,
ipv6_masked_addr_cmp(&ih6->saddr, &info->smsk,
&info->saddr))) ||
((info->bitmask & EBT_IP6_DEST) &&
NF_INVF(info, EBT_IP6_DEST,
ipv6_masked_addr_cmp(&ih6->daddr, &info->dmsk,
&info->daddr))))
return false;
if (info->bitmask & EBT_IP6_PROTO) {
uint8_t nexthdr = ih6->nexthdr;
__be16 frag_off;
int offset_ph;
offset_ph = ipv6_skip_exthdr(skb, sizeof(_ip6h), &nexthdr, &frag_off);
if (offset_ph == -1)
return false;
if (NF_INVF(info, EBT_IP6_PROTO, info->protocol != nexthdr))
return false;
if (!(info->bitmask & (EBT_IP6_DPORT |
EBT_IP6_SPORT | EBT_IP6_ICMP6)))
return true;
/* min icmpv6 headersize is 4, so sizeof(_pkthdr) is ok. */
pptr = skb_header_pointer(skb, offset_ph, sizeof(_pkthdr),
&_pkthdr);
if (pptr == NULL)
return false;
if (info->bitmask & EBT_IP6_DPORT) {
u16 dst = ntohs(pptr->tcpudphdr.dst);
if (NF_INVF(info, EBT_IP6_DPORT,
dst < info->dport[0] ||
dst > info->dport[1]))
return false;
}
if (info->bitmask & EBT_IP6_SPORT) {
u16 src = ntohs(pptr->tcpudphdr.src);
if (NF_INVF(info, EBT_IP6_SPORT,
src < info->sport[0] ||
src > info->sport[1]))
return false;
}
if ((info->bitmask & EBT_IP6_ICMP6) &&
NF_INVF(info, EBT_IP6_ICMP6,
pptr->icmphdr.type < info->icmpv6_type[0] ||
pptr->icmphdr.type > info->icmpv6_type[1] ||
pptr->icmphdr.code < info->icmpv6_code[0] ||
pptr->icmphdr.code > info->icmpv6_code[1]))
return false;
}
return true;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| kuo-lang tseng | kuo-lang tseng | 295 | 62.50% | 1 | 10.00% |
| florian westphal | florian westphal | 84 | 17.80% | 1 | 10.00% |
| joe perches | joe perches | 41 | 8.69% | 1 | 10.00% |
| jan engelhardt | jan engelhardt | 17 | 3.60% | 4 | 40.00% |
| luis fernando cornachioni estrozi | luis fernando cornachioni estrozi | 16 | 3.39% | 1 | 10.00% |
| hideaki yoshifuji | hideaki yoshifuji | 13 | 2.75% | 1 | 10.00% |
| jesse gross | jesse gross | 6 | 1.27% | 1 | 10.00% |
| Total | 472 | 100.00% | 10 | 100.00% |
static int ebt_ip6_mt_check(const struct xt_mtchk_param *par)
{
const struct ebt_entry *e = par->entryinfo;
struct ebt_ip6_info *info = par->matchinfo;
if (e->ethproto != htons(ETH_P_IPV6) || e->invflags & EBT_IPROTO)
return -EINVAL;
if (info->bitmask & ~EBT_IP6_MASK || info->invflags & ~EBT_IP6_MASK)
return -EINVAL;
if (info->bitmask & (EBT_IP6_DPORT | EBT_IP6_SPORT)) {
if (info->invflags & EBT_IP6_PROTO)
return -EINVAL;
if (info->protocol != IPPROTO_TCP &&
info->protocol != IPPROTO_UDP &&
info->protocol != IPPROTO_UDPLITE &&
info->protocol != IPPROTO_SCTP &&
info->protocol != IPPROTO_DCCP)
return -EINVAL;
}
if (info->bitmask & EBT_IP6_DPORT && info->dport[0] > info->dport[1])
return -EINVAL;
if (info->bitmask & EBT_IP6_SPORT && info->sport[0] > info->sport[1])
return -EINVAL;
if (info->bitmask & EBT_IP6_ICMP6) {
if ((info->invflags & EBT_IP6_PROTO) ||
info->protocol != IPPROTO_ICMPV6)
return -EINVAL;
if (info->icmpv6_type[0] > info->icmpv6_type[1] ||
info->icmpv6_code[0] > info->icmpv6_code[1])
return -EINVAL;
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| kuo-lang tseng | kuo-lang tseng | 159 | 62.85% | 1 | 16.67% |
| florian westphal | florian westphal | 64 | 25.30% | 1 | 16.67% |
| jan engelhardt | jan engelhardt | 30 | 11.86% | 4 | 66.67% |
| Total | 253 | 100.00% | 6 | 100.00% |
static struct xt_match ebt_ip6_mt_reg __read_mostly = {
.name = "ip6",
.revision = 0,
.family = NFPROTO_BRIDGE,
.match = ebt_ip6_mt,
.checkentry = ebt_ip6_mt_check,
.matchsize = sizeof(struct ebt_ip6_info),
.me = THIS_MODULE,
};
static int __init ebt_ip6_init(void)
{
return xt_register_match(&ebt_ip6_mt_reg);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| kuo-lang tseng | kuo-lang tseng | 14 | 87.50% | 1 | 50.00% |
| jan engelhardt | jan engelhardt | 2 | 12.50% | 1 | 50.00% |
| Total | 16 | 100.00% | 2 | 100.00% |
static void __exit ebt_ip6_fini(void)
{
xt_unregister_match(&ebt_ip6_mt_reg);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| kuo-lang tseng | kuo-lang tseng | 13 | 86.67% | 1 | 50.00% |
| jan engelhardt | jan engelhardt | 2 | 13.33% | 1 | 50.00% |
| Total | 15 | 100.00% | 2 | 100.00% |
module_init(ebt_ip6_init);
module_exit(ebt_ip6_fini);
MODULE_DESCRIPTION("Ebtables: IPv6 protocol packet match");
MODULE_AUTHOR("Kuo-Lang Tseng <kuo-lang.tseng@intel.com>");
MODULE_LICENSE("GPL");
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| kuo-lang tseng | kuo-lang tseng | 546 | 62.05% | 1 | 5.56% |
| florian westphal | florian westphal | 165 | 18.75% | 1 | 5.56% |
| jan engelhardt | jan engelhardt | 93 | 10.57% | 12 | 66.67% |
| joe perches | joe perches | 41 | 4.66% | 1 | 5.56% |
| luis fernando cornachioni estrozi | luis fernando cornachioni estrozi | 16 | 1.82% | 1 | 5.56% |
| hideaki yoshifuji | hideaki yoshifuji | 13 | 1.48% | 1 | 5.56% |
| jesse gross | jesse gross | 6 | 0.68% | 1 | 5.56% |
| Total | 880 | 100.00% | 18 | 100.00% |
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