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 #include <linux/export.h>
12 #include <linux/proc_fs.h>
15 static int udplitev6_sk_init(struct sock *sk)
18 udp_sk(sk)->pcflag = UDPLITE_BIT;
22 static int udplitev6_rcv(struct sk_buff *skb)
24 return __udp6_lib_rcv(skb, &udplite_table, IPPROTO_UDPLITE);
27 static int udplitev6_err(struct sk_buff *skb,
28 struct inet6_skb_parm *opt,
29 u8 type, u8 code, int offset, __be32 info)
31 return __udp6_lib_err(skb, opt, type, code, offset, info,
35 static const struct inet6_protocol udplitev6_protocol = {
36 .handler = udplitev6_rcv,
37 .err_handler = udplitev6_err,
38 .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL,
41 struct proto udplitev6_prot = {
44 .close = udp_lib_close,
45 .connect = ip6_datagram_connect,
46 .disconnect = udp_disconnect,
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,
55 .unhash = udp_lib_unhash,
56 .rehash = udp_v6_rehash,
57 .get_port = udp_v6_get_port,
59 .memory_allocated = &udp_memory_allocated,
60 .per_cpu_fw_alloc = &udp_memory_per_cpu_fw_alloc,
62 .sysctl_mem = sysctl_udp_mem,
63 .sysctl_wmem_offset = offsetof(struct net, ipv4.sysctl_udp_wmem_min),
64 .sysctl_rmem_offset = offsetof(struct net, ipv4.sysctl_udp_rmem_min),
65 .obj_size = sizeof(struct udp6_sock),
66 .h.udp_table = &udplite_table,
69 static struct inet_protosw udplite6_protosw = {
71 .protocol = IPPROTO_UDPLITE,
72 .prot = &udplitev6_prot,
73 .ops = &inet6_dgram_ops,
74 .flags = INET_PROTOSW_PERMANENT,
77 int __init udplitev6_init(void)
81 ret = inet6_add_protocol(&udplitev6_protocol, IPPROTO_UDPLITE);
85 ret = inet6_register_protosw(&udplite6_protosw);
87 goto out_udplitev6_protocol;
91 out_udplitev6_protocol:
92 inet6_del_protocol(&udplitev6_protocol, IPPROTO_UDPLITE);
96 void udplitev6_exit(void)
98 inet6_unregister_protosw(&udplite6_protosw);
99 inet6_del_protocol(&udplitev6_protocol, IPPROTO_UDPLITE);
102 #ifdef CONFIG_PROC_FS
103 static struct udp_seq_afinfo udplite6_seq_afinfo = {
105 .udp_table = &udplite_table,
108 static int __net_init udplite6_proc_init_net(struct net *net)
110 if (!proc_create_net_data("udplite6", 0444, net->proc_net,
111 &udp6_seq_ops, sizeof(struct udp_iter_state),
112 &udplite6_seq_afinfo))
117 static void __net_exit udplite6_proc_exit_net(struct net *net)
119 remove_proc_entry("udplite6", net->proc_net);
122 static struct pernet_operations udplite6_net_ops = {
123 .init = udplite6_proc_init_net,
124 .exit = udplite6_proc_exit_net,
127 int __init udplite6_proc_init(void)
129 return register_pernet_subsys(&udplite6_net_ops);
132 void udplite6_proc_exit(void)
134 unregister_pernet_subsys(&udplite6_net_ops);