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  *  Version:    $Id: udplite.c,v 1.9 2006/10/19 08:28:10 gerrit Exp $
   6  *
   7  *  Authors:    Gerrit Renker       <gerrit@erg.abdn.ac.uk>
   8  *
   9  *  Changes:
  10  *  Fixes:
  11  *              This program is free software; you can redistribute it and/or
  12  *              modify it under the terms of the GNU General Public License
  13  *              as published by the Free Software Foundation; either version
  14  *              2 of the License, or (at your option) any later version.
  15  */
  16 #include "udp_impl.h"
  17
  18 DEFINE_SNMP_STAT(struct udp_mib, udplite_stats_in6) __read_mostly;
  19
  20 static int udplitev6_rcv(struct sk_buff *skb)
  21 {
  22         return __udp6_lib_rcv(skb, udplite_hash, IPPROTO_UDPLITE);
  23 }
  24
  25 static void udplitev6_err(struct sk_buff *skb,
  26                           struct inet6_skb_parm *opt,
  27                           int type, int code, int offset, __be32 info)
  28 {
  29         __udp6_lib_err(skb, opt, type, code, offset, info, udplite_hash);
  30 }
  31
  32 static struct inet6_protocol udplitev6_protocol = {
  33         .handler        =       udplitev6_rcv,
  34         .err_handler    =       udplitev6_err,
  35         .flags          =       INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL,
  36 };
  37
  38 struct proto udplitev6_prot = {
  39         .name              = "UDPLITEv6",
  40         .owner             = THIS_MODULE,
  41         .close             = udp_lib_close,
  42         .connect           = ip6_datagram_connect,
  43         .disconnect        = udp_disconnect,
  44         .ioctl             = udp_ioctl,
  45         .init              = udplite_sk_init,
  46         .destroy           = udpv6_destroy_sock,
  47         .setsockopt        = udpv6_setsockopt,
  48         .getsockopt        = udpv6_getsockopt,
  49         .sendmsg           = udpv6_sendmsg,
  50         .recvmsg           = udpv6_recvmsg,
  51         .backlog_rcv       = udpv6_queue_rcv_skb,
  52         .hash              = udp_lib_hash,
  53         .unhash            = udp_lib_unhash,
  54         .get_port          = udp_v6_get_port,
  55         .obj_size          = sizeof(struct udp6_sock),
  56         .h.udp_hash        = udplite_hash,
  57 #ifdef CONFIG_COMPAT
  58         .compat_setsockopt = compat_udpv6_setsockopt,
  59         .compat_getsockopt = compat_udpv6_getsockopt,
  60 #endif
  61 };
  62
  63 static struct inet_protosw udplite6_protosw = {
  64         .type           = SOCK_DGRAM,
  65         .protocol       = IPPROTO_UDPLITE,
  66         .prot           = &udplitev6_prot,
  67         .ops            = &inet6_dgram_ops,
  68         .capability     = -1,
  69         .no_check       = 0,
  70         .flags          = INET_PROTOSW_PERMANENT,
  71 };
  72
  73 int __init udplitev6_init(void)
  74 {
  75         int ret;
  76
  77         ret = inet6_add_protocol(&udplitev6_protocol, IPPROTO_UDPLITE);
  78         if (ret)
  79                 goto out;
  80
  81         ret = inet6_register_protosw(&udplite6_protosw);
  82         if (ret)
  83                 goto out_udplitev6_protocol;
  84 out:
  85         return ret;
  86
  87 out_udplitev6_protocol:
  88         inet6_del_protocol(&udplitev6_protocol, IPPROTO_UDPLITE);
  89         goto out;
  90 }
  91
  92 void udplitev6_exit(void)
  93 {
  94         inet6_unregister_protosw(&udplite6_protosw);
  95         inet6_del_protocol(&udplitev6_protocol, IPPROTO_UDPLITE);
  96 }
  97
  98 #ifdef CONFIG_PROC_FS
  99 static struct file_operations udplite6_seq_fops;
 100 static struct udp_seq_afinfo udplite6_seq_afinfo = {
 101         .owner          = THIS_MODULE,
 102         .name           = "udplite6",
 103         .family         = AF_INET6,
 104         .hashtable      = udplite_hash,
 105         .seq_show       = udp6_seq_show,
 106         .seq_fops       = &udplite6_seq_fops,
 107 };
 108
 109 static int udplite6_proc_init_net(struct net *net)
 110 {
 111         return udp_proc_register(net, &udplite6_seq_afinfo);
 112 }
 113
 114 static void udplite6_proc_exit_net(struct net *net)
 115 {
 116         udp_proc_unregister(net, &udplite6_seq_afinfo);
 117 }
 118
 119 static struct pernet_operations udplite6_net_ops = {
 120         .init = udplite6_proc_init_net,
 121         .exit = udplite6_proc_exit_net,
 122 };
 123
 124 int __init udplite6_proc_init(void)
 125 {
 126         return register_pernet_subsys(&udplite6_net_ops);
 127 }
 128
 129 void udplite6_proc_exit(void)
 130 {
 131         unregister_pernet_subsys(&udplite6_net_ops);
 132 }
 133 #endif