net/ipv6/udplite.c

   1 /*
   2  *  UDPLITEv6   An implementation of the UDP-Lite protocol over IPv6.
   3  *              See also net/ipv4/udplite.c
   4  *
   5  *  Authors:    Gerrit Renker       <gerrit@erg.abdn.ac.uk>
   6  *
   7  *  Changes:
   8  *  Fixes:
   9  *              This program is free software; you can redistribute it and/or
  10  *              modify it under the terms of the GNU General Public License
  11  *              as published by the Free Software Foundation; either version
  12  *              2 of the License, or (at your option) any later version.
  13  */
  14 #include "udp_impl.h"
  15
  16 static int udplitev6_rcv(struct sk_buff *skb)
  17 {
  18         return __udp6_lib_rcv(skb, &udplite_table, IPPROTO_UDPLITE);
  19 }
  20
  21 static void udplitev6_err(struct sk_buff *skb,
  22                           struct inet6_skb_parm *opt,
  23                           u8 type, u8 code, int offset, __be32 info)
  24 {
  25         __udp6_lib_err(skb, opt, type, code, offset, info, &udplite_table);
  26 }
  27
  28 static 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
  34 struct 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         .backlog_rcv       = udpv6_queue_rcv_skb,
  48         .hash              = udp_lib_hash,
  49         .unhash            = udp_lib_unhash,
  50         .get_port          = udp_v6_get_port,
  51         .obj_size          = sizeof(struct udp6_sock),
  52         .slab_flags        = SLAB_DESTROY_BY_RCU,
  53         .h.udp_table       = &udplite_table,
  54 #ifdef CONFIG_COMPAT
  55         .compat_setsockopt = compat_udpv6_setsockopt,
  56         .compat_getsockopt = compat_udpv6_getsockopt,
  57 #endif
  58 };
  59
  60 static struct inet_protosw udplite6_protosw = {
  61         .type           = SOCK_DGRAM,
  62         .protocol       = IPPROTO_UDPLITE,
  63         .prot           = &udplitev6_prot,
  64         .ops            = &inet6_dgram_ops,
  65         .no_check       = 0,
  66         .flags          = INET_PROTOSW_PERMANENT,
  67 };
  68
  69 int __init udplitev6_init(void)
  70 {
  71         int ret;
  72
  73         ret = inet6_add_protocol(&udplitev6_protocol, IPPROTO_UDPLITE);
  74         if (ret)
  75                 goto out;
  76
  77         ret = inet6_register_protosw(&udplite6_protosw);
  78         if (ret)
  79                 goto out_udplitev6_protocol;
  80 out:
  81         return ret;
  82
  83 out_udplitev6_protocol:
  84         inet6_del_protocol(&udplitev6_protocol, IPPROTO_UDPLITE);
  85         goto out;
  86 }
  87
  88 void udplitev6_exit(void)
  89 {
  90         inet6_unregister_protosw(&udplite6_protosw);
  91         inet6_del_protocol(&udplitev6_protocol, IPPROTO_UDPLITE);
  92 }
  93
  94 #ifdef CONFIG_PROC_FS
  95 static struct udp_seq_afinfo udplite6_seq_afinfo = {
  96         .name           = "udplite6",
  97         .family         = AF_INET6,
  98         .udp_table      = &udplite_table,
  99         .seq_fops       = {
 100                 .owner  =       THIS_MODULE,
 101         },
 102         .seq_ops        = {
 103                 .show           = udp6_seq_show,
 104         },
 105 };
 106
 107 static int udplite6_proc_init_net(struct net *net)
 108 {
 109         return udp_proc_register(net, &udplite6_seq_afinfo);
 110 }
 111
 112 static void udplite6_proc_exit_net(struct net *net)
 113 {
 114         udp_proc_unregister(net, &udplite6_seq_afinfo);
 115 }
 116
 117 static struct pernet_operations udplite6_net_ops = {
 118         .init = udplite6_proc_init_net,
 119         .exit = udplite6_proc_exit_net,
 120 };
 121
 122 int __init udplite6_proc_init(void)
 123 {
 124         return register_pernet_subsys(&udplite6_net_ops);
 125 }
 126
 127 void udplite6_proc_exit(void)
 128 {
 129         unregister_pernet_subsys(&udplite6_net_ops);
 130 }
 131 #endif