blob: f34fd686a8f15ac6e49b687742701c1037ab1417 [file] [log] [blame]
Gerrit Renkerba4e58e2006-11-27 11:10:57 -08001/*
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];
19static int udplite_port_rover;
20
Adrian Bunkf5b99bc2006-11-30 17:22:29 -080021int udplite_get_port(struct sock *sk, unsigned short p,
David S. Millerdf2bc452007-06-05 15:18:43 -070022 int (*c)(const struct sock *, const struct sock *))
Gerrit Renkerba4e58e2006-11-27 11:10:57 -080023{
David S. Millerdf2bc452007-06-05 15:18:43 -070024 return __udp_lib_get_port(sk, p, udplite_hash, &udplite_port_rover, c);
Gerrit Renkerba4e58e2006-11-27 11:10:57 -080025}
26
Adrian Bunkf5b99bc2006-11-30 17:22:29 -080027static int udplite_v4_get_port(struct sock *sk, unsigned short snum)
Gerrit Renkerba4e58e2006-11-27 11:10:57 -080028{
David S. Millerdf2bc452007-06-05 15:18:43 -070029 return udplite_get_port(sk, snum, ipv4_rcv_saddr_equal);
Gerrit Renkerba4e58e2006-11-27 11:10:57 -080030}
31
Adrian Bunkf5b99bc2006-11-30 17:22:29 -080032static int udplite_rcv(struct sk_buff *skb)
Gerrit Renkerba4e58e2006-11-27 11:10:57 -080033{
Herbert Xu759e5d02007-03-25 20:10:56 -070034 return __udp4_lib_rcv(skb, udplite_hash, IPPROTO_UDPLITE);
Gerrit Renkerba4e58e2006-11-27 11:10:57 -080035}
36
Adrian Bunkf5b99bc2006-11-30 17:22:29 -080037static void udplite_err(struct sk_buff *skb, u32 info)
Gerrit Renkerba4e58e2006-11-27 11:10:57 -080038{
39 return __udp4_lib_err(skb, info, udplite_hash);
40}
41
42static struct net_protocol udplite_protocol = {
43 .handler = udplite_rcv,
44 .err_handler = udplite_err,
45 .no_policy = 1,
46};
47
48struct proto udplite_prot = {
49 .name = "UDP-Lite",
50 .owner = THIS_MODULE,
51 .close = udp_lib_close,
52 .connect = ip4_datagram_connect,
53 .disconnect = udp_disconnect,
54 .ioctl = udp_ioctl,
55 .init = udplite_sk_init,
56 .destroy = udp_destroy_sock,
57 .setsockopt = udp_setsockopt,
58 .getsockopt = udp_getsockopt,
59 .sendmsg = udp_sendmsg,
60 .recvmsg = udp_recvmsg,
61 .sendpage = udp_sendpage,
62 .backlog_rcv = udp_queue_rcv_skb,
63 .hash = udp_lib_hash,
64 .unhash = udp_lib_unhash,
65 .get_port = udplite_v4_get_port,
66 .obj_size = sizeof(struct udp_sock),
67#ifdef CONFIG_COMPAT
68 .compat_setsockopt = compat_udp_setsockopt,
69 .compat_getsockopt = compat_udp_getsockopt,
70#endif
71};
72
73static struct inet_protosw udplite4_protosw = {
74 .type = SOCK_DGRAM,
75 .protocol = IPPROTO_UDPLITE,
76 .prot = &udplite_prot,
77 .ops = &inet_dgram_ops,
78 .capability = -1,
79 .no_check = 0, /* must checksum (RFC 3828) */
80 .flags = INET_PROTOSW_PERMANENT,
81};
82
83#ifdef CONFIG_PROC_FS
84static struct file_operations udplite4_seq_fops;
85static struct udp_seq_afinfo udplite4_seq_afinfo = {
86 .owner = THIS_MODULE,
87 .name = "udplite",
88 .family = AF_INET,
89 .hashtable = udplite_hash,
90 .seq_show = udp4_seq_show,
91 .seq_fops = &udplite4_seq_fops,
92};
93#endif
94
95void __init udplite4_register(void)
96{
97 if (proto_register(&udplite_prot, 1))
98 goto out_register_err;
99
100 if (inet_add_protocol(&udplite_protocol, IPPROTO_UDPLITE) < 0)
101 goto out_unregister_proto;
102
103 inet_register_protosw(&udplite4_protosw);
104
105#ifdef CONFIG_PROC_FS
106 if (udp_proc_register(&udplite4_seq_afinfo)) /* udplite4_proc_init() */
107 printk(KERN_ERR "%s: Cannot register /proc!\n", __FUNCTION__);
108#endif
109 return;
110
111out_unregister_proto:
112 proto_unregister(&udplite_prot);
113out_register_err:
114 printk(KERN_CRIT "%s: Cannot add UDP-Lite protocol.\n", __FUNCTION__);
115}
116
117EXPORT_SYMBOL(udplite_hash);
118EXPORT_SYMBOL(udplite_prot);
119EXPORT_SYMBOL(udplite_get_port);