1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * UDPLITEv6 An implementation of the UDP-Lite protocol over IPv6.
4 * See also net/ipv4/udplite.c
5 *
6 * Authors: Gerrit Renker <gerrit@erg.abdn.ac.uk>
7 *
8 * Changes:
9 * Fixes:
10 */
11 #include <linux/export.h>
12 #include <linux/proc_fs.h>
13 #include "udp_impl.h"
14
15 static int udplitev6_rcv(struct sk_buff *skb)
16 {
17 return __udp6_lib_rcv(skb, &udplite_table, IPPROTO_UDPLITE);
18 }
19
20 static int udplitev6_err(struct sk_buff *skb,
21 struct inet6_skb_parm *opt,
22 u8 type, u8 code, int offset, __be32 info)
23 {
24 return __udp6_lib_err(skb, opt, type, code, offset, info,
25 &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 .hash = udp_lib_hash,
48 .unhash = udp_lib_unhash,
49 .rehash = udp_v6_rehash,
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 static struct udp_seq_afinfo udplite6_seq_afinfo = {
96 .family = AF_INET6,
97 .udp_table = &udplite_table,
98 };
99
100 static int __net_init udplite6_proc_init_net(struct net *net)
101 {
102 if (!proc_create_net_data("udplite6", 0444, net->proc_net,
103 &udp6_seq_ops, sizeof(struct udp_iter_state),
104 &udplite6_seq_afinfo))
105 return -ENOMEM;
106 return 0;
107 }
108
109 static void __net_exit udplite6_proc_exit_net(struct net *net)
110 {
111 remove_proc_entry("udplite6", net->proc_net);
112 }
113
114 static struct pernet_operations udplite6_net_ops = {
115 .init = udplite6_proc_init_net,
116 .exit = udplite6_proc_exit_net,
117 };
118
119 int __init udplite6_proc_init(void)
120 {
121 return register_pernet_subsys(&udplite6_net_ops);
122 }
123
124 void udplite6_proc_exit(void)
125 {
126 unregister_pernet_subsys(&udplite6_net_ops);
127 }
128 #endif
129
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