2 * UDPLITE An implementation of the UDP-Lite protocol (RFC 3828).
4 * Authors: Gerrit Renker <gerrit@erg.abdn.ac.uk>
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.
15 struct udp_table udplite_table;
16 EXPORT_SYMBOL(udplite_table);
18 static int udplite_rcv(struct sk_buff *skb)
20 return __udp4_lib_rcv(skb, &udplite_table, IPPROTO_UDPLITE);
23 static void udplite_err(struct sk_buff *skb, u32 info)
25 __udp4_lib_err(skb, info, &udplite_table);
28 static struct net_protocol udplite_protocol = {
29 .handler = udplite_rcv,
30 .err_handler = udplite_err,
35 struct proto udplite_prot = {
38 .close = udp_lib_close,
39 .connect = ip4_datagram_connect,
40 .disconnect = udp_disconnect,
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,
51 .unhash = udp_lib_unhash,
52 .get_port = udp_v4_get_port,
53 .obj_size = sizeof(struct udp_sock),
54 .slab_flags = SLAB_DESTROY_BY_RCU,
55 .h.udp_table = &udplite_table,
57 .compat_setsockopt = compat_udp_setsockopt,
58 .compat_getsockopt = compat_udp_getsockopt,
62 static struct inet_protosw udplite4_protosw = {
64 .protocol = IPPROTO_UDPLITE,
65 .prot = &udplite_prot,
66 .ops = &inet_dgram_ops,
68 .no_check = 0, /* must checksum (RFC 3828) */
69 .flags = INET_PROTOSW_PERMANENT,
73 static struct udp_seq_afinfo udplite4_seq_afinfo = {
76 .udp_table = &udplite_table,
81 .show = udp4_seq_show,
85 static int udplite4_proc_init_net(struct net *net)
87 return udp_proc_register(net, &udplite4_seq_afinfo);
90 static void udplite4_proc_exit_net(struct net *net)
92 udp_proc_unregister(net, &udplite4_seq_afinfo);
95 static struct pernet_operations udplite4_net_ops = {
96 .init = udplite4_proc_init_net,
97 .exit = udplite4_proc_exit_net,
100 static __init int udplite4_proc_init(void)
102 return register_pernet_subsys(&udplite4_net_ops);
105 static inline int udplite4_proc_init(void)
111 void __init udplite4_register(void)
113 udp_table_init(&udplite_table);
114 if (proto_register(&udplite_prot, 1))
115 goto out_register_err;
117 if (inet_add_protocol(&udplite_protocol, IPPROTO_UDPLITE) < 0)
118 goto out_unregister_proto;
120 inet_register_protosw(&udplite4_protosw);
122 if (udplite4_proc_init())
123 printk(KERN_ERR "%s: Cannot register /proc!\n", __func__);
126 out_unregister_proto:
127 proto_unregister(&udplite_prot);
129 printk(KERN_CRIT "%s: Cannot add UDP-Lite protocol.\n", __func__);
132 EXPORT_SYMBOL(udplite_prot);