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Gerrit Renkerba4e58e2006-11-27 11:10:57 -08001/*
2 * UDPLITE An implementation of the UDP-Lite protocol (RFC 3828).
3 *
Gerrit Renkerba4e58e2006-11-27 11:10:57 -08004 * Authors: Gerrit Renker <gerrit@erg.abdn.ac.uk>
5 *
6 * Changes:
7 * Fixes:
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * as published by the Free Software Foundation; either version
11 * 2 of the License, or (at your option) any later version.
12 */
13#include "udp_impl.h"
Gerrit Renkerba4e58e2006-11-27 11:10:57 -080014
Eric Dumazetf86dcc52009-10-07 00:37:59 +000015struct udp_table udplite_table __read_mostly;
Eric Dumazet645ca702008-10-29 01:41:45 -070016EXPORT_SYMBOL(udplite_table);
Gerrit Renkerba4e58e2006-11-27 11:10:57 -080017
Adrian Bunkf5b99bc2006-11-30 17:22:29 -080018static int udplite_rcv(struct sk_buff *skb)
Gerrit Renkerba4e58e2006-11-27 11:10:57 -080019{
Eric Dumazet645ca702008-10-29 01:41:45 -070020 return __udp4_lib_rcv(skb, &udplite_table, IPPROTO_UDPLITE);
Gerrit Renkerba4e58e2006-11-27 11:10:57 -080021}
22
Adrian Bunkf5b99bc2006-11-30 17:22:29 -080023static void udplite_err(struct sk_buff *skb, u32 info)
Gerrit Renkerba4e58e2006-11-27 11:10:57 -080024{
Eric Dumazet645ca702008-10-29 01:41:45 -070025 __udp4_lib_err(skb, info, &udplite_table);
Gerrit Renkerba4e58e2006-11-27 11:10:57 -080026}
27
Alexey Dobriyan32613092009-09-14 12:21:47 +000028static const struct net_protocol udplite_protocol = {
Gerrit Renkerba4e58e2006-11-27 11:10:57 -080029 .handler = udplite_rcv,
30 .err_handler = udplite_err,
31 .no_policy = 1,
Denis V. Lunev92f1fec2008-03-24 15:34:06 -070032 .netns_ok = 1,
Gerrit Renkerba4e58e2006-11-27 11:10:57 -080033};
34
35struct proto udplite_prot = {
36 .name = "UDP-Lite",
37 .owner = THIS_MODULE,
38 .close = udp_lib_close,
39 .connect = ip4_datagram_connect,
40 .disconnect = udp_disconnect,
41 .ioctl = udp_ioctl,
42 .init = udplite_sk_init,
43 .destroy = udp_destroy_sock,
44 .setsockopt = udp_setsockopt,
45 .getsockopt = udp_getsockopt,
46 .sendmsg = udp_sendmsg,
47 .recvmsg = udp_recvmsg,
48 .sendpage = udp_sendpage,
49 .backlog_rcv = udp_queue_rcv_skb,
50 .hash = udp_lib_hash,
51 .unhash = udp_lib_unhash,
Pavel Emelyanov6ba5a3c2008-03-22 16:51:21 -070052 .get_port = udp_v4_get_port,
Gerrit Renkerba4e58e2006-11-27 11:10:57 -080053 .obj_size = sizeof(struct udp_sock),
Eric Dumazet271b72c2008-10-29 02:11:14 -070054 .slab_flags = SLAB_DESTROY_BY_RCU,
Eric Dumazet645ca702008-10-29 01:41:45 -070055 .h.udp_table = &udplite_table,
Gerrit Renkerba4e58e2006-11-27 11:10:57 -080056#ifdef CONFIG_COMPAT
57 .compat_setsockopt = compat_udp_setsockopt,
58 .compat_getsockopt = compat_udp_getsockopt,
59#endif
Gerrit Renkerba4e58e2006-11-27 11:10:57 -080060};
61
62static struct inet_protosw udplite4_protosw = {
63 .type = SOCK_DGRAM,
64 .protocol = IPPROTO_UDPLITE,
65 .prot = &udplite_prot,
66 .ops = &inet_dgram_ops,
Gerrit Renkerba4e58e2006-11-27 11:10:57 -080067 .no_check = 0, /* must checksum (RFC 3828) */
68 .flags = INET_PROTOSW_PERMANENT,
69};
70
71#ifdef CONFIG_PROC_FS
Gerrit Renkerba4e58e2006-11-27 11:10:57 -080072static struct udp_seq_afinfo udplite4_seq_afinfo = {
Gerrit Renkerba4e58e2006-11-27 11:10:57 -080073 .name = "udplite",
74 .family = AF_INET,
Eric Dumazet645ca702008-10-29 01:41:45 -070075 .udp_table = &udplite_table,
Denis V. Lunev4ad96d32008-03-28 18:25:53 -070076 .seq_fops = {
77 .owner = THIS_MODULE,
78 },
Denis V. Lunevdda61922008-03-28 18:24:26 -070079 .seq_ops = {
80 .show = udp4_seq_show,
81 },
Gerrit Renkerba4e58e2006-11-27 11:10:57 -080082};
Pavel Emelyanovff2bac62008-03-24 14:56:34 -070083
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +000084static int __net_init udplite4_proc_init_net(struct net *net)
Pavel Emelyanov84c375a2008-03-24 14:56:57 -070085{
86 return udp_proc_register(net, &udplite4_seq_afinfo);
87}
88
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +000089static void __net_exit udplite4_proc_exit_net(struct net *net)
Pavel Emelyanov84c375a2008-03-24 14:56:57 -070090{
91 udp_proc_unregister(net, &udplite4_seq_afinfo);
92}
93
94static struct pernet_operations udplite4_net_ops = {
95 .init = udplite4_proc_init_net,
96 .exit = udplite4_proc_exit_net,
97};
98
Pavel Emelyanovff2bac62008-03-24 14:56:34 -070099static __init int udplite4_proc_init(void)
100{
Pavel Emelyanov84c375a2008-03-24 14:56:57 -0700101 return register_pernet_subsys(&udplite4_net_ops);
Pavel Emelyanovff2bac62008-03-24 14:56:34 -0700102}
103#else
104static inline int udplite4_proc_init(void)
105{
106 return 0;
107}
Gerrit Renkerba4e58e2006-11-27 11:10:57 -0800108#endif
109
110void __init udplite4_register(void)
111{
Eric Dumazetf86dcc52009-10-07 00:37:59 +0000112 udp_table_init(&udplite_table, "UDP-Lite");
Gerrit Renkerba4e58e2006-11-27 11:10:57 -0800113 if (proto_register(&udplite_prot, 1))
114 goto out_register_err;
115
116 if (inet_add_protocol(&udplite_protocol, IPPROTO_UDPLITE) < 0)
117 goto out_unregister_proto;
118
119 inet_register_protosw(&udplite4_protosw);
120
Pavel Emelyanovff2bac62008-03-24 14:56:34 -0700121 if (udplite4_proc_init())
Harvey Harrison0dc47872008-03-05 20:47:47 -0800122 printk(KERN_ERR "%s: Cannot register /proc!\n", __func__);
Gerrit Renkerba4e58e2006-11-27 11:10:57 -0800123 return;
124
125out_unregister_proto:
126 proto_unregister(&udplite_prot);
127out_register_err:
Harvey Harrison0dc47872008-03-05 20:47:47 -0800128 printk(KERN_CRIT "%s: Cannot add UDP-Lite protocol.\n", __func__);
Gerrit Renkerba4e58e2006-11-27 11:10:57 -0800129}
130
Gerrit Renkerba4e58e2006-11-27 11:10:57 -0800131EXPORT_SYMBOL(udplite_prot);