Contributors: 20
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Eric Dumazet |
199 |
31.24% |
7 |
20.00% |
| Georg Kohmann |
126 |
19.78% |
1 |
2.86% |
| Florian Westphal |
97 |
15.23% |
2 |
5.71% |
| Linus Torvalds (pre-git) |
79 |
12.40% |
6 |
17.14% |
| Pavel Emelyanov |
35 |
5.49% |
3 |
8.57% |
| Peter Oskolkov |
17 |
2.67% |
1 |
2.86% |
| Hideaki Yoshifuji / 吉藤英明 |
17 |
2.67% |
1 |
2.86% |
| Américo Wang |
16 |
2.51% |
1 |
2.86% |
| Ingo Oeser |
12 |
1.88% |
1 |
2.86% |
| Daniel Lezcano |
7 |
1.10% |
1 |
2.86% |
| Harald Welte |
5 |
0.78% |
1 |
2.86% |
| Hannes Frederic Sowa |
5 |
0.78% |
1 |
2.86% |
| Nikolay Aleksandrov |
4 |
0.63% |
2 |
5.71% |
| Denis V. Lunev |
4 |
0.63% |
1 |
2.86% |
| Yi-Hung Wei |
4 |
0.63% |
1 |
2.86% |
| Jakub Kiciński |
3 |
0.47% |
1 |
2.86% |
| Joe Perches |
2 |
0.31% |
1 |
2.86% |
| Joe Stringer |
2 |
0.31% |
1 |
2.86% |
| Alexey Dobriyan |
2 |
0.31% |
1 |
2.86% |
| Eric W. Biedermann |
1 |
0.16% |
1 |
2.86% |
| Total |
637 |
|
35 |
|
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _IPV6_FRAG_H
#define _IPV6_FRAG_H
#include <linux/icmpv6.h>
#include <linux/kernel.h>
#include <net/addrconf.h>
#include <net/ipv6.h>
#include <net/inet_frag.h>
enum ip6_defrag_users {
IP6_DEFRAG_LOCAL_DELIVER,
IP6_DEFRAG_CONNTRACK_IN,
__IP6_DEFRAG_CONNTRACK_IN = IP6_DEFRAG_CONNTRACK_IN + USHRT_MAX,
IP6_DEFRAG_CONNTRACK_OUT,
__IP6_DEFRAG_CONNTRACK_OUT = IP6_DEFRAG_CONNTRACK_OUT + USHRT_MAX,
IP6_DEFRAG_CONNTRACK_BRIDGE_IN,
__IP6_DEFRAG_CONNTRACK_BRIDGE_IN = IP6_DEFRAG_CONNTRACK_BRIDGE_IN + USHRT_MAX,
};
/*
* Equivalent of ipv4 struct ip
*/
struct frag_queue {
struct inet_frag_queue q;
int iif;
__u16 nhoffset;
u8 ecn;
};
#if IS_ENABLED(CONFIG_IPV6)
static inline void ip6frag_init(struct inet_frag_queue *q, const void *a)
{
struct frag_queue *fq = container_of(q, struct frag_queue, q);
const struct frag_v6_compare_key *key = a;
q->key.v6 = *key;
fq->ecn = 0;
}
static inline u32 ip6frag_key_hashfn(const void *data, u32 len, u32 seed)
{
return jhash2(data,
sizeof(struct frag_v6_compare_key) / sizeof(u32), seed);
}
static inline u32 ip6frag_obj_hashfn(const void *data, u32 len, u32 seed)
{
const struct inet_frag_queue *fq = data;
return jhash2((const u32 *)&fq->key.v6,
sizeof(struct frag_v6_compare_key) / sizeof(u32), seed);
}
static inline int
ip6frag_obj_cmpfn(struct rhashtable_compare_arg *arg, const void *ptr)
{
const struct frag_v6_compare_key *key = arg->key;
const struct inet_frag_queue *fq = ptr;
return !!memcmp(&fq->key, key, sizeof(*key));
}
static inline void
ip6frag_expire_frag_queue(struct net *net, struct frag_queue *fq)
{
struct net_device *dev = NULL;
struct sk_buff *head;
rcu_read_lock();
/* Paired with the WRITE_ONCE() in fqdir_pre_exit(). */
if (READ_ONCE(fq->q.fqdir->dead))
goto out_rcu_unlock;
spin_lock(&fq->q.lock);
if (fq->q.flags & INET_FRAG_COMPLETE)
goto out;
fq->q.flags |= INET_FRAG_DROP;
inet_frag_kill(&fq->q);
dev = dev_get_by_index_rcu(net, fq->iif);
if (!dev)
goto out;
__IP6_INC_STATS(net, __in6_dev_get(dev), IPSTATS_MIB_REASMFAILS);
__IP6_INC_STATS(net, __in6_dev_get(dev), IPSTATS_MIB_REASMTIMEOUT);
/* Don't send error if the first segment did not arrive. */
if (!(fq->q.flags & INET_FRAG_FIRST_IN))
goto out;
/* sk_buff::dev and sk_buff::rbnode are unionized. So we
* pull the head out of the tree in order to be able to
* deal with head->dev.
*/
head = inet_frag_pull_head(&fq->q);
if (!head)
goto out;
head->dev = dev;
spin_unlock(&fq->q.lock);
icmpv6_send(head, ICMPV6_TIME_EXCEED, ICMPV6_EXC_FRAGTIME, 0);
kfree_skb_reason(head, SKB_DROP_REASON_FRAG_REASM_TIMEOUT);
goto out_rcu_unlock;
out:
spin_unlock(&fq->q.lock);
out_rcu_unlock:
rcu_read_unlock();
inet_frag_put(&fq->q);
}
/* Check if the upper layer header is truncated in the first fragment. */
static inline bool
ipv6frag_thdr_truncated(struct sk_buff *skb, int start, u8 *nexthdrp)
{
u8 nexthdr = *nexthdrp;
__be16 frag_off;
int offset;
offset = ipv6_skip_exthdr(skb, start, &nexthdr, &frag_off);
if (offset < 0 || (frag_off & htons(IP6_OFFSET)))
return false;
switch (nexthdr) {
case NEXTHDR_TCP:
offset += sizeof(struct tcphdr);
break;
case NEXTHDR_UDP:
offset += sizeof(struct udphdr);
break;
case NEXTHDR_ICMP:
offset += sizeof(struct icmp6hdr);
break;
default:
offset += 1;
}
if (offset > skb->len)
return true;
return false;
}
#endif
#endif