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 <linux/export.h>
15 #include "udp_impl.h"
16
17 static int udplitev6_rcv(struct sk_buff *skb)
18 {
19 return __udp6_lib_rcv(skb, &udplite_table, IPPROTO_UDPLITE);
20 }
21
22 static void udplitev6_err(struct sk_buff *skb,
23 struct inet6_skb_parm *opt,
24 u8 type, u8 code, int offset, __be32 info)
25 {
26 __udp6_lib_err(skb, opt, type, code, offset, info, &udplite_table);
27 }
28
29 static const struct inet6_protocol udplitev6_protocol = {
30 .handler = udplitev6_rcv,
31 .err_handler = udplitev6_err,
32 .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL,
33 };
34
35 struct proto udplitev6_prot = {
36 .name = "UDPLITEv6",
37 .owner = THIS_MODULE,
38 .close = udp_lib_close,
39 .connect = ip6_datagram_connect,
40 .disconnect = udp_disconnect,
41 .ioctl = udp_ioctl,
42 .init = udplite_sk_init,
43 .destroy = udpv6_destroy_sock,
44 .setsockopt = udpv6_setsockopt,
45 .getsockopt = udpv6_getsockopt,
46 .sendmsg = udpv6_sendmsg,
47 .recvmsg = udpv6_recvmsg,
48 .hash = udp_lib_hash,
49 .unhash = udp_lib_unhash,
50 .get_port = udp_v6_get_port,
51 .memory_allocated = &udp_memory_allocated,
52 .sysctl_mem = sysctl_udp_mem,
53 .obj_size = sizeof(struct udp6_sock),
54 .h.udp_table = &udplite_table,
55 #ifdef CONFIG_COMPAT
56 .compat_setsockopt = compat_udpv6_setsockopt,
57 .compat_getsockopt = compat_udpv6_getsockopt,
58 #endif
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 .flags = INET_PROTOSW_PERMANENT,
67 };
68
69 int __init udplitev6_init(void)
70 {
71 int ret;
72
73 ret = inet6_add_protocol(&udplitev6_protocol, IPPROTO_UDPLITE);
74 if (ret)
75 goto out;
76
77 ret = inet6_register_protosw(&udplite6_protosw);
78 if (ret)
79 goto out_udplitev6_protocol;
80 out:
81 return ret;
82
83 out_udplitev6_protocol:
84 inet6_del_protocol(&udplitev6_protocol, IPPROTO_UDPLITE);
85 goto out;
86 }
87
88 void udplitev6_exit(void)
89 {
90 inet6_unregister_protosw(&udplite6_protosw);
91 inet6_del_protocol(&udplitev6_protocol, IPPROTO_UDPLITE);
92 }
93
94 #ifdef CONFIG_PROC_FS
95
96 static const struct file_operations udplite6_afinfo_seq_fops = {
97 .owner = THIS_MODULE,
98 .open = udp_seq_open,
99 .read = seq_read,
100 .llseek = seq_lseek,
101 .release = seq_release_net
102 };
103
104 static struct udp_seq_afinfo udplite6_seq_afinfo = {
105 .name = "udplite6",
106 .family = AF_INET6,
107 .udp_table = &udplite_table,
108 .seq_fops = &udplite6_afinfo_seq_fops,
109 .seq_ops = {
110 .show = udp6_seq_show,
111 },
112 };
113
114 static int __net_init udplite6_proc_init_net(struct net *net)
115 {
116 return udp_proc_register(net, &udplite6_seq_afinfo);
117 }
118
119 static void __net_exit udplite6_proc_exit_net(struct net *net)
120 {
121 udp_proc_unregister(net, &udplite6_seq_afinfo);
122 }
123
124 static struct pernet_operations udplite6_net_ops = {
125 .init = udplite6_proc_init_net,
126 .exit = udplite6_proc_exit_net,
127 };
128
129 int __init udplite6_proc_init(void)
130 {
131 return register_pernet_subsys(&udplite6_net_ops);
132 }
133
134 void udplite6_proc_exit(void)
135 {
136 unregister_pernet_subsys(&udplite6_net_ops);
137 }
138 #endif
139
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