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Linux kernel mirror (for testing)
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kernel
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linux
1/*
2 * UDPLITE An implementation of the UDP-Lite protocol (RFC 3828).
3 *
4 * Version: $Id: udplite.c,v 1.25 2006/10/19 07:22:36 gerrit Exp $
5 *
6 * Authors: Gerrit Renker <gerrit@erg.abdn.ac.uk>
7 *
8 * Changes:
9 * Fixes:
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
14 */
15#include "udp_impl.h"
16DEFINE_SNMP_STAT(struct udp_mib, udplite_statistics) __read_mostly;
17
18struct hlist_head udplite_hash[UDP_HTABLE_SIZE];
19
20static int udplite_rcv(struct sk_buff *skb)
21{
22 return __udp4_lib_rcv(skb, udplite_hash, IPPROTO_UDPLITE);
23}
24
25static void udplite_err(struct sk_buff *skb, u32 info)
26{
27 __udp4_lib_err(skb, info, udplite_hash);
28}
29
30static struct net_protocol udplite_protocol = {
31 .handler = udplite_rcv,
32 .err_handler = udplite_err,
33 .no_policy = 1,
34 .netns_ok = 1,
35};
36
37struct proto udplite_prot = {
38 .name = "UDP-Lite",
39 .owner = THIS_MODULE,
40 .close = udp_lib_close,
41 .connect = ip4_datagram_connect,
42 .disconnect = udp_disconnect,
43 .ioctl = udp_ioctl,
44 .init = udplite_sk_init,
45 .destroy = udp_destroy_sock,
46 .setsockopt = udp_setsockopt,
47 .getsockopt = udp_getsockopt,
48 .sendmsg = udp_sendmsg,
49 .recvmsg = udp_recvmsg,
50 .sendpage = udp_sendpage,
51 .backlog_rcv = udp_queue_rcv_skb,
52 .hash = udp_lib_hash,
53 .unhash = udp_lib_unhash,
54 .get_port = udp_v4_get_port,
55 .obj_size = sizeof(struct udp_sock),
56 .h.udp_hash = udplite_hash,
57#ifdef CONFIG_COMPAT
58 .compat_setsockopt = compat_udp_setsockopt,
59 .compat_getsockopt = compat_udp_getsockopt,
60#endif
61};
62
63static struct inet_protosw udplite4_protosw = {
64 .type = SOCK_DGRAM,
65 .protocol = IPPROTO_UDPLITE,
66 .prot = &udplite_prot,
67 .ops = &inet_dgram_ops,
68 .capability = -1,
69 .no_check = 0, /* must checksum (RFC 3828) */
70 .flags = INET_PROTOSW_PERMANENT,
71};
72
73#ifdef CONFIG_PROC_FS
74static struct udp_seq_afinfo udplite4_seq_afinfo = {
75 .name = "udplite",
76 .family = AF_INET,
77 .hashtable = udplite_hash,
78 .seq_fops = {
79 .owner = THIS_MODULE,
80 },
81 .seq_ops = {
82 .show = udp4_seq_show,
83 },
84};
85
86static int udplite4_proc_init_net(struct net *net)
87{
88 return udp_proc_register(net, &udplite4_seq_afinfo);
89}
90
91static void udplite4_proc_exit_net(struct net *net)
92{
93 udp_proc_unregister(net, &udplite4_seq_afinfo);
94}
95
96static struct pernet_operations udplite4_net_ops = {
97 .init = udplite4_proc_init_net,
98 .exit = udplite4_proc_exit_net,
99};
100
101static __init int udplite4_proc_init(void)
102{
103 return register_pernet_subsys(&udplite4_net_ops);
104}
105#else
106static inline int udplite4_proc_init(void)
107{
108 return 0;
109}
110#endif
111
112void __init udplite4_register(void)
113{
114 if (proto_register(&udplite_prot, 1))
115 goto out_register_err;
116
117 if (inet_add_protocol(&udplite_protocol, IPPROTO_UDPLITE) < 0)
118 goto out_unregister_proto;
119
120 inet_register_protosw(&udplite4_protosw);
121
122 if (udplite4_proc_init())
123 printk(KERN_ERR "%s: Cannot register /proc!\n", __func__);
124 return;
125
126out_unregister_proto:
127 proto_unregister(&udplite_prot);
128out_register_err:
129 printk(KERN_CRIT "%s: Cannot add UDP-Lite protocol.\n", __func__);
130}
131
132EXPORT_SYMBOL(udplite_hash);
133EXPORT_SYMBOL(udplite_prot);