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 };
56
57 static struct inet_protosw udplite6_protosw = {
58 .type = SOCK_DGRAM,
59 .protocol = IPPROTO_UDPLITE,
60 .prot = &udplitev6_prot,
61 .ops = &inet6_dgram_ops,
62 .flags = INET_PROTOSW_PERMANENT,
63 };
64
65 int __init udplitev6_init(void)
66 {
67 int ret;
68
69 ret = inet6_add_protocol(&udplitev6_protocol, IPPROTO_UDPLITE);
70 if (ret)
71 goto out;
72
73 ret = inet6_register_protosw(&udplite6_protosw);
74 if (ret)
75 goto out_udplitev6_protocol;
76 out:
77 return ret;
78
79 out_udplitev6_protocol:
80 inet6_del_protocol(&udplitev6_protocol, IPPROTO_UDPLITE);
81 goto out;
82 }
83
84 void udplitev6_exit(void)
85 {
86 inet6_unregister_protosw(&udplite6_protosw);
87 inet6_del_protocol(&udplitev6_protocol, IPPROTO_UDPLITE);
88 }
89
90 #ifdef CONFIG_PROC_FS
91 static struct udp_seq_afinfo udplite6_seq_afinfo = {
92 .family = AF_INET6,
93 .udp_table = &udplite_table,
94 };
95
96 static int __net_init udplite6_proc_init_net(struct net *net)
97 {
98 if (!proc_create_net_data("udplite6", 0444, net->proc_net,
99 &udp6_seq_ops, sizeof(struct udp_iter_state),
100 &udplite6_seq_afinfo))
101 return -ENOMEM;
102 return 0;
103 }
104
105 static void __net_exit udplite6_proc_exit_net(struct net *net)
106 {
107 remove_proc_entry("udplite6", net->proc_net);
108 }
109
110 static struct pernet_operations udplite6_net_ops = {
111 .init = udplite6_proc_init_net,
112 .exit = udplite6_proc_exit_net,
113 };
114
115 int __init udplite6_proc_init(void)
116 {
117 return register_pernet_subsys(&udplite6_net_ops);
118 }
119
120 void udplite6_proc_exit(void)
121 {
122 unregister_pernet_subsys(&udplite6_net_ops);
123 }
124 #endif
125
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