1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* UDPLITE An implementation of the UDP-Lite protocol (RFC 3828).
*
* Authors: Gerrit Renker <gerrit@erg.abdn.ac.uk>
*
* Changes:
* Fixes:
*/
#define pr_fmt(fmt) "UDPLite: " fmt
#include <linux/export.h>
#include <linux/proc_fs.h>
#include "udp_impl.h"
struct udp_table udplite_table __read_mostly;
EXPORT_SYMBOL(udplite_table);
/* Designate sk as UDP-Lite socket */
static int udplite_sk_init(struct sock *sk)
{
udp_init_sock(sk);
udp_sk(sk)->pcflag = UDPLITE_BIT;
return 0;
}
static int udplite_rcv(struct sk_buff *skb)
{
return __udp4_lib_rcv(skb, &udplite_table, IPPROTO_UDPLITE);
}
static int udplite_err(struct sk_buff *skb, u32 info)
{
return __udp4_lib_err(skb, info, &udplite_table);
}
static const struct net_protocol udplite_protocol = {
.handler = udplite_rcv,
.err_handler = udplite_err,
.no_policy = 1,
.netns_ok = 1,
};
struct proto udplite_prot = {
.name = "UDP-Lite",
.owner = THIS_MODULE,
.close = udp_lib_close,
.connect = ip4_datagram_connect,
.disconnect = udp_disconnect,
.ioctl = udp_ioctl,
.init = udplite_sk_init,
.destroy = udp_destroy_sock,
.setsockopt = udp_setsockopt,
.getsockopt = udp_getsockopt,
.sendmsg = udp_sendmsg,
.recvmsg = udp_recvmsg,
.sendpage = udp_sendpage,
.hash = udp_lib_hash,
.unhash = udp_lib_unhash,
.rehash = udp_v4_rehash,
.get_port = udp_v4_get_port,
.memory_allocated = &udp_memory_allocated,
.sysctl_mem = sysctl_udp_mem,
.sysctl_wmem_offset = offsetof(struct net, ipv4.sysctl_udp_wmem_min),
.sysctl_rmem_offset = offsetof(struct net, ipv4.sysctl_udp_rmem_min),
.obj_size = sizeof(struct udp_sock),
.h.udp_table = &udplite_table,
};
EXPORT_SYMBOL(udplite_prot);
static struct inet_protosw udplite4_protosw = {
.type = SOCK_DGRAM,
.protocol = IPPROTO_UDPLITE,
.prot = &udplite_prot,
.ops = &inet_dgram_ops,
.flags = INET_PROTOSW_PERMANENT,
};
#ifdef CONFIG_PROC_FS
static struct udp_seq_afinfo udplite4_seq_afinfo = {
.family = AF_INET,
.udp_table = &udplite_table,
};
static int __net_init udplite4_proc_init_net(struct net *net)
{
if (!proc_create_net_data("udplite", 0444, net->proc_net, &udp_seq_ops,
sizeof(struct udp_iter_state), &udplite4_seq_afinfo))
return -ENOMEM;
return 0;
}
static void __net_exit udplite4_proc_exit_net(struct net *net)
{
remove_proc_entry("udplite", net->proc_net);
}
static struct pernet_operations udplite4_net_ops = {
.init = udplite4_proc_init_net,
.exit = udplite4_proc_exit_net,
};
static __init int udplite4_proc_init(void)
{
return register_pernet_subsys(&udplite4_net_ops);
}
#else
static inline int udplite4_proc_init(void)
{
return 0;
}
#endif
void __init udplite4_register(void)
{
udp_table_init(&udplite_table, "UDP-Lite");
if (proto_register(&udplite_prot, 1))
goto out_register_err;
if (inet_add_protocol(&udplite_protocol, IPPROTO_UDPLITE) < 0)
goto out_unregister_proto;
inet_register_protosw(&udplite4_protosw);
if (udplite4_proc_init())
pr_err("%s: Cannot register /proc!\n", __func__);
return;
out_unregister_proto:
proto_unregister(&udplite_prot);
out_register_err:
pr_crit("%s: Cannot add UDP-Lite protocol\n", __func__);
}
|
