1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * UDPLITEv6 An implementation of the UDP-Lite protocol over IPv6.
4 * See also net/ipv4/udplite.c
6 * Authors: Gerrit Renker <gerrit@erg.abdn.ac.uk>
11 #define pr_fmt(fmt) "UDPLite6: " fmt
13 #include <linux/export.h>
14 #include <linux/proc_fs.h>
17 static int udplitev6_sk_init(struct sock *sk)
20 udp_sk(sk)->pcflag = UDPLITE_BIT;
21 pr_warn_once("UDP-Lite is deprecated and scheduled to be removed in 2025, "
22 "please contact the netdev mailing list\n");
26 static int udplitev6_rcv(struct sk_buff *skb)
28 return __udp6_lib_rcv(skb, &udplite_table, IPPROTO_UDPLITE);
31 static int udplitev6_err(struct sk_buff *skb,
32 struct inet6_skb_parm *opt,
33 u8 type, u8 code, int offset, __be32 info)
35 return __udp6_lib_err(skb, opt, type, code, offset, info,
39 static const struct inet6_protocol udplitev6_protocol = {
40 .handler = udplitev6_rcv,
41 .err_handler = udplitev6_err,
42 .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL,
45 struct proto udplitev6_prot = {
48 .close = udp_lib_close,
49 .connect = ip6_datagram_connect,
50 .disconnect = udp_disconnect,
52 .init = udplitev6_sk_init,
53 .destroy = udpv6_destroy_sock,
54 .setsockopt = udpv6_setsockopt,
55 .getsockopt = udpv6_getsockopt,
56 .sendmsg = udpv6_sendmsg,
57 .recvmsg = udpv6_recvmsg,
59 .unhash = udp_lib_unhash,
60 .rehash = udp_v6_rehash,
61 .get_port = udp_v6_get_port,
63 .memory_allocated = &udp_memory_allocated,
64 .per_cpu_fw_alloc = &udp_memory_per_cpu_fw_alloc,
66 .sysctl_mem = sysctl_udp_mem,
67 .sysctl_wmem_offset = offsetof(struct net, ipv4.sysctl_udp_wmem_min),
68 .sysctl_rmem_offset = offsetof(struct net, ipv4.sysctl_udp_rmem_min),
69 .obj_size = sizeof(struct udp6_sock),
70 .ipv6_pinfo_offset = offsetof(struct udp6_sock, inet6),
71 .h.udp_table = &udplite_table,
74 static struct inet_protosw udplite6_protosw = {
76 .protocol = IPPROTO_UDPLITE,
77 .prot = &udplitev6_prot,
78 .ops = &inet6_dgram_ops,
79 .flags = INET_PROTOSW_PERMANENT,
82 int __init udplitev6_init(void)
86 ret = inet6_add_protocol(&udplitev6_protocol, IPPROTO_UDPLITE);
90 ret = inet6_register_protosw(&udplite6_protosw);
92 goto out_udplitev6_protocol;
96 out_udplitev6_protocol:
97 inet6_del_protocol(&udplitev6_protocol, IPPROTO_UDPLITE);
101 void udplitev6_exit(void)
103 inet6_unregister_protosw(&udplite6_protosw);
104 inet6_del_protocol(&udplitev6_protocol, IPPROTO_UDPLITE);
107 #ifdef CONFIG_PROC_FS
108 static struct udp_seq_afinfo udplite6_seq_afinfo = {
110 .udp_table = &udplite_table,
113 static int __net_init udplite6_proc_init_net(struct net *net)
115 if (!proc_create_net_data("udplite6", 0444, net->proc_net,
116 &udp6_seq_ops, sizeof(struct udp_iter_state),
117 &udplite6_seq_afinfo))
122 static void __net_exit udplite6_proc_exit_net(struct net *net)
124 remove_proc_entry("udplite6", net->proc_net);
127 static struct pernet_operations udplite6_net_ops = {
128 .init = udplite6_proc_init_net,
129 .exit = udplite6_proc_exit_net,
132 int __init udplite6_proc_init(void)
134 return register_pernet_subsys(&udplite6_net_ops);
137 void udplite6_proc_exit(void)
139 unregister_pernet_subsys(&udplite6_net_ops);