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 __read_mostly
;
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 const 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
, "UDP-Lite");
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
);