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 DEFINE_SNMP_STAT(struct udp_mib, udplite_stats_in6) __read_mostly;
  17
  18 static int udplitev6_rcv(struct sk_buff *skb)
  19 {
  20         return __udp6_lib_rcv(skb, udplite_hash, IPPROTO_UDPLITE);
  21 }
  22
  23 static void udplitev6_err(struct sk_buff *skb,
  24                           struct inet6_skb_parm *opt,
  25                           int type, int code, int offset, __be32 info)
  26 {
  27         __udp6_lib_err(skb, opt, type, code, offset, info, udplite_hash);
  28 }
  29
  30 static struct inet6_protocol udplitev6_protocol = {
  31         .handler        =       udplitev6_rcv,
  32         .err_handler    =       udplitev6_err,
  33         .flags          =       INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL,
  34 };
  35
  36 struct proto udplitev6_prot = {
  37         .name              = "UDPLITEv6",
  38         .owner             = THIS_MODULE,
  39         .close             = udp_lib_close,
  40         .connect           = ip6_datagram_connect,
  41         .disconnect        = udp_disconnect,
  42         .ioctl             = udp_ioctl,
  43         .init              = udplite_sk_init,
  44         .destroy           = udpv6_destroy_sock,
  45         .setsockopt        = udpv6_setsockopt,
  46         .getsockopt        = udpv6_getsockopt,
  47         .sendmsg           = udpv6_sendmsg,
  48         .recvmsg           = udpv6_recvmsg,
  49         .backlog_rcv       = udpv6_queue_rcv_skb,
  50         .hash              = udp_lib_hash,
  51         .unhash            = udp_lib_unhash,
  52         .get_port          = udp_v6_get_port,
  53         .obj_size          = sizeof(struct udp6_sock),
  54         .h.udp_hash        = udplite_hash,
  55 #ifdef CONFIG_COMPAT
  56         .compat_setsockopt = compat_udpv6_setsockopt,
  57         .compat_getsockopt = compat_udpv6_getsockopt,
  58 #endif
  59 };
  60
  61 static struct inet_protosw udplite6_protosw = {
  62         .type           = SOCK_DGRAM,
  63         .protocol       = IPPROTO_UDPLITE,
  64         .prot           = &udplitev6_prot,
  65         .ops            = &inet6_dgram_ops,
  66         .capability     = -1,
  67         .no_check       = 0,
  68         .flags          = INET_PROTOSW_PERMANENT,
  69 };
  70
  71 int __init udplitev6_init(void)
  72 {
  73         int ret;
  74
  75         ret = inet6_add_protocol(&udplitev6_protocol, IPPROTO_UDPLITE);
  76         if (ret)
  77                 goto out;
  78
  79         ret = inet6_register_protosw(&udplite6_protosw);
  80         if (ret)
  81                 goto out_udplitev6_protocol;
  82 out:
  83         return ret;
  84
  85 out_udplitev6_protocol:
  86         inet6_del_protocol(&udplitev6_protocol, IPPROTO_UDPLITE);
  87         goto out;
  88 }
  89
  90 void udplitev6_exit(void)
  91 {
  92         inet6_unregister_protosw(&udplite6_protosw);
  93         inet6_del_protocol(&udplitev6_protocol, IPPROTO_UDPLITE);
  94 }
  95
  96 #ifdef CONFIG_PROC_FS
  97 static struct udp_seq_afinfo udplite6_seq_afinfo = {
  98         .name           = "udplite6",
  99         .family         = AF_INET6,
 100         .hashtable      = udplite_hash,
 101         .seq_fops       = {
 102                 .owner  =       THIS_MODULE,
 103         },
 104         .seq_ops        = {
 105                 .show           = udp6_seq_show,
 106         },
 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