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
udplitev6_rcv(struct sk_buff * skb)17 static int udplitev6_rcv(struct sk_buff *skb)
18 {
19 return __udp6_lib_rcv(skb, &udplite_table, IPPROTO_UDPLITE);
20 }
21
udplitev6_err(struct sk_buff * skb,struct inet6_skb_parm * opt,u8 type,u8 code,int offset,__be32 info)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 .backlog_rcv = __udpv6_queue_rcv_skb,
49 .hash = udp_lib_hash,
50 .unhash = udp_lib_unhash,
51 .get_port = udp_v6_get_port,
52 .obj_size = sizeof(struct udp6_sock),
53 .slab_flags = SLAB_DESTROY_BY_RCU,
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 .clear_sk = udp_v6_clear_sk,
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
97 static const struct file_operations udplite6_afinfo_seq_fops = {
98 .owner = THIS_MODULE,
99 .open = udp_seq_open,
100 .read = seq_read,
101 .llseek = seq_lseek,
102 .release = seq_release_net
103 };
104
105 static struct udp_seq_afinfo udplite6_seq_afinfo = {
106 .name = "udplite6",
107 .family = AF_INET6,
108 .udp_table = &udplite_table,
109 .seq_fops = &udplite6_afinfo_seq_fops,
110 .seq_ops = {
111 .show = udp6_seq_show,
112 },
113 };
114
udplite6_proc_init_net(struct net * net)115 static int __net_init udplite6_proc_init_net(struct net *net)
116 {
117 return udp_proc_register(net, &udplite6_seq_afinfo);
118 }
119
udplite6_proc_exit_net(struct net * net)120 static void __net_exit udplite6_proc_exit_net(struct net *net)
121 {
122 udp_proc_unregister(net, &udplite6_seq_afinfo);
123 }
124
125 static struct pernet_operations udplite6_net_ops = {
126 .init = udplite6_proc_init_net,
127 .exit = udplite6_proc_exit_net,
128 };
129
udplite6_proc_init(void)130 int __init udplite6_proc_init(void)
131 {
132 return register_pernet_subsys(&udplite6_net_ops);
133 }
134
udplite6_proc_exit(void)135 void udplite6_proc_exit(void)
136 {
137 unregister_pernet_subsys(&udplite6_net_ops);
138 }
139 #endif
140