1 /*
2 * UDPLITEv6 An implementation of the UDP-Lite protocol over IPv6.
3 * See also net/ipv4/udplite.c
4 *
5 * Authors: Gerrit Renker <gerrit@erg.abdn.ac.uk>
6 *
7 * Changes:
8 * Fixes:
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License
11 * as published by the Free Software Foundation; either version
12 * 2 of the License, or (at your option) any later version.
13 */
14 #include "udp_impl.h"
15
udplitev6_rcv(struct sk_buff * skb)16 static int udplitev6_rcv(struct sk_buff *skb)
17 {
18 return __udp6_lib_rcv(skb, &udplite_table, IPPROTO_UDPLITE);
19 }
20
udplitev6_err(struct sk_buff * skb,struct inet6_skb_parm * opt,u8 type,u8 code,int offset,__be32 info)21 static void udplitev6_err(struct sk_buff *skb,
22 struct inet6_skb_parm *opt,
23 u8 type, u8 code, int offset, __be32 info)
24 {
25 __udp6_lib_err(skb, opt, type, code, offset, info, &udplite_table);
26 }
27
28 static const struct inet6_protocol udplitev6_protocol = {
29 .handler = udplitev6_rcv,
30 .err_handler = udplitev6_err,
31 .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL,
32 };
33
34 struct proto udplitev6_prot = {
35 .name = "UDPLITEv6",
36 .owner = THIS_MODULE,
37 .close = udp_lib_close,
38 .connect = ip6_datagram_connect,
39 .disconnect = udp_disconnect,
40 .ioctl = udp_ioctl,
41 .init = udplite_sk_init,
42 .destroy = udpv6_destroy_sock,
43 .setsockopt = udpv6_setsockopt,
44 .getsockopt = udpv6_getsockopt,
45 .sendmsg = udpv6_sendmsg,
46 .recvmsg = udpv6_recvmsg,
47 .backlog_rcv = udpv6_queue_rcv_skb,
48 .hash = udp_lib_hash,
49 .unhash = udp_lib_unhash,
50 .get_port = udp_v6_get_port,
51 .obj_size = sizeof(struct udp6_sock),
52 .slab_flags = SLAB_DESTROY_BY_RCU,
53 .h.udp_table = &udplite_table,
54 #ifdef CONFIG_COMPAT
55 .compat_setsockopt = compat_udpv6_setsockopt,
56 .compat_getsockopt = compat_udpv6_getsockopt,
57 #endif
58 .clear_sk = sk_prot_clear_portaddr_nulls,
59 };
60
61 static struct inet_protosw udplite6_protosw = {
62 .type = SOCK_DGRAM,
63 .protocol = IPPROTO_UDPLITE,
64 .prot = &udplitev6_prot,
65 .ops = &inet6_dgram_ops,
66 .no_check = 0,
67 .flags = INET_PROTOSW_PERMANENT,
68 };
69
udplitev6_init(void)70 int __init udplitev6_init(void)
71 {
72 int ret;
73
74 ret = inet6_add_protocol(&udplitev6_protocol, IPPROTO_UDPLITE);
75 if (ret)
76 goto out;
77
78 ret = inet6_register_protosw(&udplite6_protosw);
79 if (ret)
80 goto out_udplitev6_protocol;
81 out:
82 return ret;
83
84 out_udplitev6_protocol:
85 inet6_del_protocol(&udplitev6_protocol, IPPROTO_UDPLITE);
86 goto out;
87 }
88
udplitev6_exit(void)89 void udplitev6_exit(void)
90 {
91 inet6_unregister_protosw(&udplite6_protosw);
92 inet6_del_protocol(&udplitev6_protocol, IPPROTO_UDPLITE);
93 }
94
95 #ifdef CONFIG_PROC_FS
96 static struct udp_seq_afinfo udplite6_seq_afinfo = {
97 .name = "udplite6",
98 .family = AF_INET6,
99 .udp_table = &udplite_table,
100 .seq_fops = {
101 .owner = THIS_MODULE,
102 },
103 .seq_ops = {
104 .show = udp6_seq_show,
105 },
106 };
107
udplite6_proc_init_net(struct net * net)108 static int __net_init udplite6_proc_init_net(struct net *net)
109 {
110 return udp_proc_register(net, &udplite6_seq_afinfo);
111 }
112
udplite6_proc_exit_net(struct net * net)113 static void __net_exit udplite6_proc_exit_net(struct net *net)
114 {
115 udp_proc_unregister(net, &udplite6_seq_afinfo);
116 }
117
118 static struct pernet_operations udplite6_net_ops = {
119 .init = udplite6_proc_init_net,
120 .exit = udplite6_proc_exit_net,
121 };
122
udplite6_proc_init(void)123 int __init udplite6_proc_init(void)
124 {
125 return register_pernet_subsys(&udplite6_net_ops);
126 }
127
udplite6_proc_exit(void)128 void udplite6_proc_exit(void)
129 {
130 unregister_pernet_subsys(&udplite6_net_ops);
131 }
132 #endif
133