LXR linux/net/ipv6/udplite.c

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