| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* |
| * UDPLITEv6 An implementation of the UDP-Lite protocol over IPv6. |
| * See also net/ipv4/udplite.c |
| * |
| * Authors: Gerrit Renker <gerrit@erg.abdn.ac.uk> |
| * |
| * Changes: |
| * Fixes: |
| */ |
| #define pr_fmt(fmt) "UDPLite6: " fmt |
| |
| #include <linux/export.h> |
| #include <linux/proc_fs.h> |
| #include "udp_impl.h" |
| |
| static int udplitev6_sk_init(struct sock *sk) |
| { |
| udpv6_init_sock(sk); |
| udp_sk(sk)->pcflag = UDPLITE_BIT; |
| pr_warn_once("UDP-Lite is deprecated and scheduled to be removed in 2025, " |
| "please contact the netdev mailing list\n"); |
| return 0; |
| } |
| |
| static int udplitev6_rcv(struct sk_buff *skb) |
| { |
| return __udp6_lib_rcv(skb, &udplite_table, IPPROTO_UDPLITE); |
| } |
| |
| static int udplitev6_err(struct sk_buff *skb, |
| struct inet6_skb_parm *opt, |
| u8 type, u8 code, int offset, __be32 info) |
| { |
| return __udp6_lib_err(skb, opt, type, code, offset, info, |
| &udplite_table); |
| } |
| |
| static const struct inet6_protocol udplitev6_protocol = { |
| .handler = udplitev6_rcv, |
| .err_handler = udplitev6_err, |
| .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL, |
| }; |
| |
| struct proto udplitev6_prot = { |
| .name = "UDPLITEv6", |
| .owner = THIS_MODULE, |
| .close = udp_lib_close, |
| .connect = ip6_datagram_connect, |
| .disconnect = udp_disconnect, |
| .ioctl = udp_ioctl, |
| .init = udplitev6_sk_init, |
| .destroy = udpv6_destroy_sock, |
| .setsockopt = udpv6_setsockopt, |
| .getsockopt = udpv6_getsockopt, |
| .sendmsg = udpv6_sendmsg, |
| .recvmsg = udpv6_recvmsg, |
| .hash = udp_lib_hash, |
| .unhash = udp_lib_unhash, |
| .rehash = udp_v6_rehash, |
| .get_port = udp_v6_get_port, |
| |
| .memory_allocated = &udp_memory_allocated, |
| .per_cpu_fw_alloc = &udp_memory_per_cpu_fw_alloc, |
| |
| .sysctl_mem = sysctl_udp_mem, |
| .sysctl_wmem_offset = offsetof(struct net, ipv4.sysctl_udp_wmem_min), |
| .sysctl_rmem_offset = offsetof(struct net, ipv4.sysctl_udp_rmem_min), |
| .obj_size = sizeof(struct udp6_sock), |
| .h.udp_table = &udplite_table, |
| }; |
| |
| static struct inet_protosw udplite6_protosw = { |
| .type = SOCK_DGRAM, |
| .protocol = IPPROTO_UDPLITE, |
| .prot = &udplitev6_prot, |
| .ops = &inet6_dgram_ops, |
| .flags = INET_PROTOSW_PERMANENT, |
| }; |
| |
| int __init udplitev6_init(void) |
| { |
| int ret; |
| |
| ret = inet6_add_protocol(&udplitev6_protocol, IPPROTO_UDPLITE); |
| if (ret) |
| goto out; |
| |
| ret = inet6_register_protosw(&udplite6_protosw); |
| if (ret) |
| goto out_udplitev6_protocol; |
| out: |
| return ret; |
| |
| out_udplitev6_protocol: |
| inet6_del_protocol(&udplitev6_protocol, IPPROTO_UDPLITE); |
| goto out; |
| } |
| |
| void udplitev6_exit(void) |
| { |
| inet6_unregister_protosw(&udplite6_protosw); |
| inet6_del_protocol(&udplitev6_protocol, IPPROTO_UDPLITE); |
| } |
| |
| #ifdef CONFIG_PROC_FS |
| static struct udp_seq_afinfo udplite6_seq_afinfo = { |
| .family = AF_INET6, |
| .udp_table = &udplite_table, |
| }; |
| |
| static int __net_init udplite6_proc_init_net(struct net *net) |
| { |
| if (!proc_create_net_data("udplite6", 0444, net->proc_net, |
| &udp6_seq_ops, sizeof(struct udp_iter_state), |
| &udplite6_seq_afinfo)) |
| return -ENOMEM; |
| return 0; |
| } |
| |
| static void __net_exit udplite6_proc_exit_net(struct net *net) |
| { |
| remove_proc_entry("udplite6", net->proc_net); |
| } |
| |
| static struct pernet_operations udplite6_net_ops = { |
| .init = udplite6_proc_init_net, |
| .exit = udplite6_proc_exit_net, |
| }; |
| |
| int __init udplite6_proc_init(void) |
| { |
| return register_pernet_subsys(&udplite6_net_ops); |
| } |
| |
| void udplite6_proc_exit(void) |
| { |
| unregister_pernet_subsys(&udplite6_net_ops); |
| } |
| #endif |