1 // SPDX-License-Identifier: GPL-2.0-only
2 /* (C) 1999-2001 Paul `Rusty' Russell
3 * (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org>
4 */
5
6 #include <linux/types.h>
7 #include <linux/jiffies.h>
8 #include <linux/timer.h>
9 #include <linux/netfilter.h>
10 #include <net/netfilter/nf_conntrack_l4proto.h>
11 #include <net/netfilter/nf_conntrack_timeout.h>
12
13 static const unsigned int nf_ct_generic_timeout = 600*HZ;
14
15 #ifdef CONFIG_NF_CONNTRACK_TIMEOUT
16
17 #include <linux/netfilter/nfnetlink.h>
18 #include <linux/netfilter/nfnetlink_cttimeout.h>
19
generic_timeout_nlattr_to_obj(struct nlattr * tb[],struct net * net,void * data)20 static int generic_timeout_nlattr_to_obj(struct nlattr *tb[],
21 struct net *net, void *data)
22 {
23 struct nf_generic_net *gn = nf_generic_pernet(net);
24 unsigned int *timeout = data;
25
26 if (!timeout)
27 timeout = &gn->timeout;
28
29 if (tb[CTA_TIMEOUT_GENERIC_TIMEOUT])
30 *timeout =
31 ntohl(nla_get_be32(tb[CTA_TIMEOUT_GENERIC_TIMEOUT])) * HZ;
32 else {
33 /* Set default generic timeout. */
34 *timeout = gn->timeout;
35 }
36
37 return 0;
38 }
39
40 static int
generic_timeout_obj_to_nlattr(struct sk_buff * skb,const void * data)41 generic_timeout_obj_to_nlattr(struct sk_buff *skb, const void *data)
42 {
43 const unsigned int *timeout = data;
44
45 if (nla_put_be32(skb, CTA_TIMEOUT_GENERIC_TIMEOUT, htonl(*timeout / HZ)))
46 goto nla_put_failure;
47
48 return 0;
49
50 nla_put_failure:
51 return -ENOSPC;
52 }
53
54 static const struct nla_policy
55 generic_timeout_nla_policy[CTA_TIMEOUT_GENERIC_MAX+1] = {
56 [CTA_TIMEOUT_GENERIC_TIMEOUT] = { .type = NLA_U32 },
57 };
58 #endif /* CONFIG_NF_CONNTRACK_TIMEOUT */
59
nf_conntrack_generic_init_net(struct net * net)60 void nf_conntrack_generic_init_net(struct net *net)
61 {
62 struct nf_generic_net *gn = nf_generic_pernet(net);
63
64 gn->timeout = nf_ct_generic_timeout;
65 }
66
67 const struct nf_conntrack_l4proto nf_conntrack_l4proto_generic =
68 {
69 .l4proto = 255,
70 #ifdef CONFIG_NF_CONNTRACK_TIMEOUT
71 .ctnl_timeout = {
72 .nlattr_to_obj = generic_timeout_nlattr_to_obj,
73 .obj_to_nlattr = generic_timeout_obj_to_nlattr,
74 .nlattr_max = CTA_TIMEOUT_GENERIC_MAX,
75 .obj_size = sizeof(unsigned int),
76 .nla_policy = generic_timeout_nla_policy,
77 },
78 #endif /* CONFIG_NF_CONNTRACK_TIMEOUT */
79 };
80