[NET]: Supporting UDP-Lite (RFC 3828) in Linux
[linux-2.6.git] / net / ipv6 / udplite.c
1 /*
2  *  UDPLITEv6   An implementation of the UDP-Lite protocol over IPv6.
3  *              See also net/ipv4/udplite.c
4  *
5  *  Version:    $Id: udplite.c,v 1.9 2006/10/19 08:28:10 gerrit Exp $
6  *
7  *  Authors:    Gerrit Renker       <gerrit@erg.abdn.ac.uk>
8  *
9  *  Changes:
10  *  Fixes:
11  *              This program is free software; you can redistribute it and/or
12  *              modify it under the terms of the GNU General Public License
13  *              as published by the Free Software Foundation; either version
14  *              2 of the License, or (at your option) any later version.
15  */
16 #include "udp_impl.h"
17
18 DEFINE_SNMP_STAT(struct udp_mib, udplite_stats_in6) __read_mostly;
19
20 static __inline__ int udplitev6_rcv(struct sk_buff **pskb)
21 {
22         return __udp6_lib_rcv(pskb, udplite_hash, 1);
23 }
24
25 static __inline__ void udplitev6_err(struct sk_buff *skb,
26                                      struct inet6_skb_parm *opt,
27                                      int type, int code, int offset, __u32 info)
28 {
29         return __udp6_lib_err(skb, opt, type, code, offset, info, udplite_hash);
30 }
31
32 static struct inet6_protocol udplitev6_protocol = {
33         .handler        =       udplitev6_rcv,
34         .err_handler    =       udplitev6_err,
35         .flags          =       INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL,
36 };
37
38 static __inline__ int udplite_v6_get_port(struct sock *sk, unsigned short snum)
39 {
40         return udplite_get_port(sk, snum, ipv6_rcv_saddr_equal);
41 }
42
43 struct proto udplitev6_prot = {
44         .name              = "UDPLITEv6",
45         .owner             = THIS_MODULE,
46         .close             = udp_lib_close,
47         .connect           = ip6_datagram_connect,
48         .disconnect        = udp_disconnect,
49         .ioctl             = udp_ioctl,
50         .init              = udplite_sk_init,
51         .destroy           = udpv6_destroy_sock,
52         .setsockopt        = udpv6_setsockopt,
53         .getsockopt        = udpv6_getsockopt,
54         .sendmsg           = udpv6_sendmsg,
55         .recvmsg           = udpv6_recvmsg,
56         .backlog_rcv       = udpv6_queue_rcv_skb,
57         .hash              = udp_lib_hash,
58         .unhash            = udp_lib_unhash,
59         .get_port          = udplite_v6_get_port,
60         .obj_size          = sizeof(struct udp6_sock),
61 #ifdef CONFIG_COMPAT
62         .compat_setsockopt = compat_udpv6_setsockopt,
63         .compat_getsockopt = compat_udpv6_getsockopt,
64 #endif
65 };
66
67 static struct inet_protosw udplite6_protosw = {
68         .type           = SOCK_DGRAM,
69         .protocol       = IPPROTO_UDPLITE,
70         .prot           = &udplitev6_prot,
71         .ops            = &inet6_dgram_ops,
72         .capability     = -1,
73         .no_check       = 0,
74         .flags          = INET_PROTOSW_PERMANENT,
75 };
76
77 void __init udplitev6_init(void)
78 {
79         if (inet6_add_protocol(&udplitev6_protocol, IPPROTO_UDPLITE) < 0)
80                 printk(KERN_ERR "%s: Could not register.\n", __FUNCTION__);
81
82         inet6_register_protosw(&udplite6_protosw);
83 }
84
85 #ifdef CONFIG_PROC_FS
86 static struct file_operations udplite6_seq_fops;
87 static struct udp_seq_afinfo udplite6_seq_afinfo = {
88         .owner          = THIS_MODULE,
89         .name           = "udplite6",
90         .family         = AF_INET6,
91         .hashtable      = udplite_hash,
92         .seq_show       = udp6_seq_show,
93         .seq_fops       = &udplite6_seq_fops,
94 };
95
96 int __init udplite6_proc_init(void)
97 {
98         return udp_proc_register(&udplite6_seq_afinfo);
99 }
100
101 void udplite6_proc_exit(void)
102 {
103         udp_proc_unregister(&udplite6_seq_afinfo);
104 }
105 #endif