net/ipv6/udplite.c

0001 // SPDX-License-Identifier: GPL-2.0-or-later
0002 /*
0003  *  UDPLITEv6   An implementation of the UDP-Lite protocol over IPv6.
0004  *              See also net/ipv4/udplite.c
0005  *
0006  *  Authors:    Gerrit Renker       <gerrit@erg.abdn.ac.uk>
0007  *
0008  *  Changes:
0009  *  Fixes:
0010  */
0011 #include <linux/export.h>
0012 #include <linux/proc_fs.h>
0013 #include "udp_impl.h"
0014
0015 static int udplitev6_rcv(struct sk_buff *skb)
0016 {
0017     return __udp6_lib_rcv(skb, &udplite_table, IPPROTO_UDPLITE);
0018 }
0019
0020 static int udplitev6_err(struct sk_buff *skb,
0021               struct inet6_skb_parm *opt,
0022               u8 type, u8 code, int offset, __be32 info)
0023 {
0024     return __udp6_lib_err(skb, opt, type, code, offset, info,
0025                   &udplite_table);
0026 }
0027
0028 static const struct inet6_protocol udplitev6_protocol = {
0029     .handler    =   udplitev6_rcv,
0030     .err_handler    =   udplitev6_err,
0031     .flags      =   INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL,
0032 };
0033
0034 struct proto udplitev6_prot = {
0035     .name          = "UDPLITEv6",
0036     .owner         = THIS_MODULE,
0037     .close         = udp_lib_close,
0038     .connect       = ip6_datagram_connect,
0039     .disconnect    = udp_disconnect,
0040     .ioctl         = udp_ioctl,
0041     .init          = udplite_sk_init,
0042     .destroy       = udpv6_destroy_sock,
0043     .setsockopt    = udpv6_setsockopt,
0044     .getsockopt    = udpv6_getsockopt,
0045     .sendmsg       = udpv6_sendmsg,
0046     .recvmsg       = udpv6_recvmsg,
0047     .hash          = udp_lib_hash,
0048     .unhash        = udp_lib_unhash,
0049     .rehash        = udp_v6_rehash,
0050     .get_port      = udp_v6_get_port,
0051
0052     .memory_allocated  = &udp_memory_allocated,
0053     .per_cpu_fw_alloc  = &udp_memory_per_cpu_fw_alloc,
0054
0055     .sysctl_mem    = sysctl_udp_mem,
0056     .obj_size      = sizeof(struct udp6_sock),
0057     .h.udp_table       = &udplite_table,
0058 };
0059
0060 static struct inet_protosw udplite6_protosw = {
0061     .type       = SOCK_DGRAM,
0062     .protocol   = IPPROTO_UDPLITE,
0063     .prot       = &udplitev6_prot,
0064     .ops        = &inet6_dgram_ops,
0065     .flags      = INET_PROTOSW_PERMANENT,
0066 };
0067
0068 int __init udplitev6_init(void)
0069 {
0070     int ret;
0071
0072     ret = inet6_add_protocol(&udplitev6_protocol, IPPROTO_UDPLITE);
0073     if (ret)
0074         goto out;
0075
0076     ret = inet6_register_protosw(&udplite6_protosw);
0077     if (ret)
0078         goto out_udplitev6_protocol;
0079 out:
0080     return ret;
0081
0082 out_udplitev6_protocol:
0083     inet6_del_protocol(&udplitev6_protocol, IPPROTO_UDPLITE);
0084     goto out;
0085 }
0086
0087 void udplitev6_exit(void)
0088 {
0089     inet6_unregister_protosw(&udplite6_protosw);
0090     inet6_del_protocol(&udplitev6_protocol, IPPROTO_UDPLITE);
0091 }
0092
0093 #ifdef CONFIG_PROC_FS
0094 static struct udp_seq_afinfo udplite6_seq_afinfo = {
0095     .family     = AF_INET6,
0096     .udp_table  = &udplite_table,
0097 };
0098
0099 static int __net_init udplite6_proc_init_net(struct net *net)
0100 {
0101     if (!proc_create_net_data("udplite6", 0444, net->proc_net,
0102             &udp6_seq_ops, sizeof(struct udp_iter_state),
0103             &udplite6_seq_afinfo))
0104         return -ENOMEM;
0105     return 0;
0106 }
0107
0108 static void __net_exit udplite6_proc_exit_net(struct net *net)
0109 {
0110     remove_proc_entry("udplite6", net->proc_net);
0111 }
0112
0113 static struct pernet_operations udplite6_net_ops = {
0114     .init = udplite6_proc_init_net,
0115     .exit = udplite6_proc_exit_net,
0116 };
0117
0118 int __init udplite6_proc_init(void)
0119 {
0120     return register_pernet_subsys(&udplite6_net_ops);
0121 }
0122
0123 void udplite6_proc_exit(void)
0124 {
0125     unregister_pernet_subsys(&udplite6_net_ops);
0126 }
0127 #endif