Fix misspellings of "system", "controller", "interrupt" and "necessary".
[linux-2.6] / net / ipv4 / udplite.c
1 /*
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"
16 DEFINE_SNMP_STAT(struct udp_mib, udplite_statistics)    __read_mostly;
17
18 struct hlist_head       udplite_hash[UDP_HTABLE_SIZE];
19
20 int udplite_get_port(struct sock *sk, unsigned short p,
21                      int (*c)(const struct sock *, const struct sock *))
22 {
23         return  __udp_lib_get_port(sk, p, udplite_hash, c);
24 }
25
26 static int udplite_v4_get_port(struct sock *sk, unsigned short snum)
27 {
28         return udplite_get_port(sk, snum, ipv4_rcv_saddr_equal);
29 }
30
31 static int udplite_rcv(struct sk_buff *skb)
32 {
33         return __udp4_lib_rcv(skb, udplite_hash, IPPROTO_UDPLITE);
34 }
35
36 static void udplite_err(struct sk_buff *skb, u32 info)
37 {
38         return __udp4_lib_err(skb, info, udplite_hash);
39 }
40
41 static  struct net_protocol udplite_protocol = {
42         .handler        = udplite_rcv,
43         .err_handler    = udplite_err,
44         .no_policy      = 1,
45 };
46
47 struct proto    udplite_prot = {
48         .name              = "UDP-Lite",
49         .owner             = THIS_MODULE,
50         .close             = udp_lib_close,
51         .connect           = ip4_datagram_connect,
52         .disconnect        = udp_disconnect,
53         .ioctl             = udp_ioctl,
54         .init              = udplite_sk_init,
55         .destroy           = udp_destroy_sock,
56         .setsockopt        = udp_setsockopt,
57         .getsockopt        = udp_getsockopt,
58         .sendmsg           = udp_sendmsg,
59         .recvmsg           = udp_recvmsg,
60         .sendpage          = udp_sendpage,
61         .backlog_rcv       = udp_queue_rcv_skb,
62         .hash              = udp_lib_hash,
63         .unhash            = udp_lib_unhash,
64         .get_port          = udplite_v4_get_port,
65         .obj_size          = sizeof(struct udp_sock),
66 #ifdef CONFIG_COMPAT
67         .compat_setsockopt = compat_udp_setsockopt,
68         .compat_getsockopt = compat_udp_getsockopt,
69 #endif
70 };
71
72 static struct inet_protosw udplite4_protosw = {
73         .type           =  SOCK_DGRAM,
74         .protocol       =  IPPROTO_UDPLITE,
75         .prot           =  &udplite_prot,
76         .ops            =  &inet_dgram_ops,
77         .capability     = -1,
78         .no_check       =  0,           /* must checksum (RFC 3828) */
79         .flags          =  INET_PROTOSW_PERMANENT,
80 };
81
82 #ifdef CONFIG_PROC_FS
83 static struct file_operations udplite4_seq_fops;
84 static struct udp_seq_afinfo udplite4_seq_afinfo = {
85         .owner          = THIS_MODULE,
86         .name           = "udplite",
87         .family         = AF_INET,
88         .hashtable      = udplite_hash,
89         .seq_show       = udp4_seq_show,
90         .seq_fops       = &udplite4_seq_fops,
91 };
92 #endif
93
94 void __init udplite4_register(void)
95 {
96         if (proto_register(&udplite_prot, 1))
97                 goto out_register_err;
98
99         if (inet_add_protocol(&udplite_protocol, IPPROTO_UDPLITE) < 0)
100                 goto out_unregister_proto;
101
102         inet_register_protosw(&udplite4_protosw);
103
104 #ifdef CONFIG_PROC_FS
105         if (udp_proc_register(&udplite4_seq_afinfo)) /* udplite4_proc_init() */
106                 printk(KERN_ERR "%s: Cannot register /proc!\n", __FUNCTION__);
107 #endif
108         return;
109
110 out_unregister_proto:
111         proto_unregister(&udplite_prot);
112 out_register_err:
113         printk(KERN_CRIT "%s: Cannot add UDP-Lite protocol.\n", __FUNCTION__);
114 }
115
116 EXPORT_SYMBOL(udplite_hash);
117 EXPORT_SYMBOL(udplite_prot);
118 EXPORT_SYMBOL(udplite_get_port);