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.
14 #define pr_fmt(fmt) "UDPLite: " fmt
16 #include <linux/export.h>
17 #include <linux/proc_fs.h>
20 struct udp_table udplite_table __read_mostly;
21 EXPORT_SYMBOL(udplite_table);
23 static int udplite_rcv(struct sk_buff *skb)
25 return __udp4_lib_rcv(skb, &udplite_table, IPPROTO_UDPLITE);
28 static int udplite_err(struct sk_buff *skb, u32 info)
30 return __udp4_lib_err(skb, info, &udplite_table);
33 static const struct net_protocol udplite_protocol = {
34 .handler = udplite_rcv,
35 .err_handler = udplite_err,
40 struct proto udplite_prot = {
43 .close = udp_lib_close,
44 .connect = ip4_datagram_connect,
45 .disconnect = udp_disconnect,
47 .init = udplite_sk_init,
48 .destroy = udp_destroy_sock,
49 .setsockopt = udp_setsockopt,
50 .getsockopt = udp_getsockopt,
51 .sendmsg = udp_sendmsg,
52 .recvmsg = udp_recvmsg,
53 .sendpage = udp_sendpage,
55 .unhash = udp_lib_unhash,
56 .rehash = udp_v4_rehash,
57 .get_port = udp_v4_get_port,
58 .memory_allocated = &udp_memory_allocated,
59 .sysctl_mem = sysctl_udp_mem,
60 .obj_size = sizeof(struct udp_sock),
61 .h.udp_table = &udplite_table,
63 .compat_setsockopt = compat_udp_setsockopt,
64 .compat_getsockopt = compat_udp_getsockopt,
67 EXPORT_SYMBOL(udplite_prot);
69 static struct inet_protosw udplite4_protosw = {
71 .protocol = IPPROTO_UDPLITE,
72 .prot = &udplite_prot,
73 .ops = &inet_dgram_ops,
74 .flags = INET_PROTOSW_PERMANENT,
78 static struct udp_seq_afinfo udplite4_seq_afinfo = {
80 .udp_table = &udplite_table,
83 static int __net_init udplite4_proc_init_net(struct net *net)
85 if (!proc_create_net_data("udplite", 0444, net->proc_net, &udp_seq_ops,
86 sizeof(struct udp_iter_state), &udplite4_seq_afinfo))
91 static void __net_exit udplite4_proc_exit_net(struct net *net)
93 remove_proc_entry("udplite", net->proc_net);
96 static struct pernet_operations udplite4_net_ops = {
97 .init = udplite4_proc_init_net,
98 .exit = udplite4_proc_exit_net,
101 static __init int udplite4_proc_init(void)
103 return register_pernet_subsys(&udplite4_net_ops);
106 static inline int udplite4_proc_init(void)
112 void __init udplite4_register(void)
114 udp_table_init(&udplite_table, "UDP-Lite");
115 if (proto_register(&udplite_prot, 1))
116 goto out_register_err;
118 if (inet_add_protocol(&udplite_protocol, IPPROTO_UDPLITE) < 0)
119 goto out_unregister_proto;
121 inet_register_protosw(&udplite4_protosw);
123 if (udplite4_proc_init())
124 pr_err("%s: Cannot register /proc!\n", __func__);
127 out_unregister_proto:
128 proto_unregister(&udplite_prot);
130 pr_crit("%s: Cannot add UDP-Lite protocol\n", __func__);