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Linux kernel mirror (for testing)
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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
15static int udplitev6_sk_init(struct sock *sk)
16{
17 udpv6_init_sock(sk);
18 udp_sk(sk)->pcflag = UDPLITE_BIT;
19 return 0;
20}
21
22static int udplitev6_rcv(struct sk_buff *skb)
23{
24 return __udp6_lib_rcv(skb, &udplite_table, IPPROTO_UDPLITE);
25}
26
27static int udplitev6_err(struct sk_buff *skb,
28 struct inet6_skb_parm *opt,
29 u8 type, u8 code, int offset, __be32 info)
30{
31 return __udp6_lib_err(skb, opt, type, code, offset, info,
32 &udplite_table);
33}
34
35static const struct inet6_protocol udplitev6_protocol = {
36 .handler = udplitev6_rcv,
37 .err_handler = udplitev6_err,
38 .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL,
39};
40
41struct proto udplitev6_prot = {
42 .name = "UDPLITEv6",
43 .owner = THIS_MODULE,
44 .close = udp_lib_close,
45 .connect = ip6_datagram_connect,
46 .disconnect = udp_disconnect,
47 .ioctl = udp_ioctl,
48 .init = udplitev6_sk_init,
49 .destroy = udpv6_destroy_sock,
50 .setsockopt = udpv6_setsockopt,
51 .getsockopt = udpv6_getsockopt,
52 .sendmsg = udpv6_sendmsg,
53 .recvmsg = udpv6_recvmsg,
54 .hash = udp_lib_hash,
55 .unhash = udp_lib_unhash,
56 .rehash = udp_v6_rehash,
57 .get_port = udp_v6_get_port,
58
59 .memory_allocated = &udp_memory_allocated,
60 .per_cpu_fw_alloc = &udp_memory_per_cpu_fw_alloc,
61
62 .sysctl_mem = sysctl_udp_mem,
63 .obj_size = sizeof(struct udp6_sock),
64 .h.udp_table = &udplite_table,
65};
66
67static struct inet_protosw udplite6_protosw = {
68 .type = SOCK_DGRAM,
69 .protocol = IPPROTO_UDPLITE,
70 .prot = &udplitev6_prot,
71 .ops = &inet6_dgram_ops,
72 .flags = INET_PROTOSW_PERMANENT,
73};
74
75int __init udplitev6_init(void)
76{
77 int ret;
78
79 ret = inet6_add_protocol(&udplitev6_protocol, IPPROTO_UDPLITE);
80 if (ret)
81 goto out;
82
83 ret = inet6_register_protosw(&udplite6_protosw);
84 if (ret)
85 goto out_udplitev6_protocol;
86out:
87 return ret;
88
89out_udplitev6_protocol:
90 inet6_del_protocol(&udplitev6_protocol, IPPROTO_UDPLITE);
91 goto out;
92}
93
94void udplitev6_exit(void)
95{
96 inet6_unregister_protosw(&udplite6_protosw);
97 inet6_del_protocol(&udplitev6_protocol, IPPROTO_UDPLITE);
98}
99
100#ifdef CONFIG_PROC_FS
101static struct udp_seq_afinfo udplite6_seq_afinfo = {
102 .family = AF_INET6,
103 .udp_table = &udplite_table,
104};
105
106static int __net_init udplite6_proc_init_net(struct net *net)
107{
108 if (!proc_create_net_data("udplite6", 0444, net->proc_net,
109 &udp6_seq_ops, sizeof(struct udp_iter_state),
110 &udplite6_seq_afinfo))
111 return -ENOMEM;
112 return 0;
113}
114
115static void __net_exit udplite6_proc_exit_net(struct net *net)
116{
117 remove_proc_entry("udplite6", net->proc_net);
118}
119
120static struct pernet_operations udplite6_net_ops = {
121 .init = udplite6_proc_init_net,
122 .exit = udplite6_proc_exit_net,
123};
124
125int __init udplite6_proc_init(void)
126{
127 return register_pernet_subsys(&udplite6_net_ops);
128}
129
130void udplite6_proc_exit(void)
131{
132 unregister_pernet_subsys(&udplite6_net_ops);
133}
134#endif