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 <linux/proc_fs.h>
16 #include "udp_impl.h"
17
udplitev6_rcv(struct sk_buff * skb)18 static int udplitev6_rcv(struct sk_buff *skb)
19 {
20 return __udp6_lib_rcv(skb, &udplite_table, IPPROTO_UDPLITE);
21 }
22
udplitev6_err(struct sk_buff * skb,struct inet6_skb_parm * opt,u8 type,u8 code,int offset,__be32 info)23 static void udplitev6_err(struct sk_buff *skb,
24 struct inet6_skb_parm *opt,
25 u8 type, u8 code, int offset, __be32 info)
26 {
27 __udp6_lib_err(skb, opt, type, code, offset, info, &udplite_table);
28 }
29
30 static const struct inet6_protocol udplitev6_protocol = {
31 .handler = udplitev6_rcv,
32 .err_handler = udplitev6_err,
33 .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL,
34 };
35
36 struct proto udplitev6_prot = {
37 .name = "UDPLITEv6",
38 .owner = THIS_MODULE,
39 .close = udp_lib_close,
40 .connect = ip6_datagram_connect,
41 .disconnect = udp_disconnect,
42 .ioctl = udp_ioctl,
43 .init = udplite_sk_init,
44 .destroy = udpv6_destroy_sock,
45 .setsockopt = udpv6_setsockopt,
46 .getsockopt = udpv6_getsockopt,
47 .sendmsg = udpv6_sendmsg,
48 .recvmsg = udpv6_recvmsg,
49 .hash = udp_lib_hash,
50 .unhash = udp_lib_unhash,
51 .get_port = udp_v6_get_port,
52 .memory_allocated = &udp_memory_allocated,
53 .sysctl_mem = sysctl_udp_mem,
54 .obj_size = sizeof(struct udp6_sock),
55 .h.udp_table = &udplite_table,
56 #ifdef CONFIG_COMPAT
57 .compat_setsockopt = compat_udpv6_setsockopt,
58 .compat_getsockopt = compat_udpv6_getsockopt,
59 #endif
60 };
61
62 static struct inet_protosw udplite6_protosw = {
63 .type = SOCK_DGRAM,
64 .protocol = IPPROTO_UDPLITE,
65 .prot = &udplitev6_prot,
66 .ops = &inet6_dgram_ops,
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 .family = AF_INET6,
98 .udp_table = &udplite_table,
99 };
100
udplite6_proc_init_net(struct net * net)101 static int __net_init udplite6_proc_init_net(struct net *net)
102 {
103 if (!proc_create_net_data("udplite6", 0444, net->proc_net,
104 &udp6_seq_ops, sizeof(struct udp_iter_state),
105 &udplite6_seq_afinfo))
106 return -ENOMEM;
107 return 0;
108 }
109
udplite6_proc_exit_net(struct net * net)110 static void __net_exit udplite6_proc_exit_net(struct net *net)
111 {
112 remove_proc_entry("udplite6", net->proc_net);
113 }
114
115 static struct pernet_operations udplite6_net_ops = {
116 .init = udplite6_proc_init_net,
117 .exit = udplite6_proc_exit_net,
118 };
119
udplite6_proc_init(void)120 int __init udplite6_proc_init(void)
121 {
122 return register_pernet_subsys(&udplite6_net_ops);
123 }
124
udplite6_proc_exit(void)125 void udplite6_proc_exit(void)
126 {
127 unregister_pernet_subsys(&udplite6_net_ops);
128 }
129 #endif
130
