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 static int udplite_v6_get_port(struct sock *sk, unsigned short snum)
  39 {
  40         return udplite_get_port(sk, snum, ipv6_rcv_saddr_equal);
  41 }
  42
  43 DEFINE_PROTO_INUSE(udplitev6)
  44
  45 struct proto udplitev6_prot = {
  46         .name              = "UDPLITEv6",
  47         .owner             = THIS_MODULE,
  48         .close             = udp_lib_close,
  49         .connect           = ip6_datagram_connect,
  50         .disconnect        = udp_disconnect,
  51         .ioctl             = udp_ioctl,
  52         .init              = udplite_sk_init,
  53         .destroy           = udpv6_destroy_sock,
  54         .setsockopt        = udpv6_setsockopt,
  55         .getsockopt        = udpv6_getsockopt,
  56         .sendmsg           = udpv6_sendmsg,
  57         .recvmsg           = udpv6_recvmsg,
  58         .backlog_rcv       = udpv6_queue_rcv_skb,
  59         .hash              = udp_lib_hash,
  60         .unhash            = udp_lib_unhash,
  61         .get_port          = udplite_v6_get_port,
  62         .obj_size          = sizeof(struct udp6_sock),
  63 #ifdef CONFIG_COMPAT
  64         .compat_setsockopt = compat_udpv6_setsockopt,
  65         .compat_getsockopt = compat_udpv6_getsockopt,
  66 #endif
  67         REF_PROTO_INUSE(udplitev6)
  68 };
  69
  70 static struct inet_protosw udplite6_protosw = {
  71         .type           = SOCK_DGRAM,
  72         .protocol       = IPPROTO_UDPLITE,
  73         .prot           = &udplitev6_prot,
  74         .ops            = &inet6_dgram_ops,
  75         .capability     = -1,
  76         .no_check       = 0,
  77         .flags          = INET_PROTOSW_PERMANENT,
  78 };
  79
  80 int __init udplitev6_init(void)
  81 {
  82         int ret;
  83
  84         ret = inet6_add_protocol(&udplitev6_protocol, IPPROTO_UDPLITE);
  85         if (ret)
  86                 goto out;
  87
  88         ret = inet6_register_protosw(&udplite6_protosw);
  89         if (ret)
  90                 goto out_udplitev6_protocol;
  91 out:
  92         return ret;
  93
  94 out_udplitev6_protocol:
  95         inet6_del_protocol(&udplitev6_protocol, IPPROTO_UDPLITE);
  96         goto out;
  97 }
  98
  99 void udplitev6_exit(void)
 100 {
 101         inet6_unregister_protosw(&udplite6_protosw);
 102         inet6_del_protocol(&udplitev6_protocol, IPPROTO_UDPLITE);
 103 }
 104
 105 #ifdef CONFIG_PROC_FS
 106 static struct file_operations udplite6_seq_fops;
 107 static struct udp_seq_afinfo udplite6_seq_afinfo = {
 108         .owner          = THIS_MODULE,
 109         .name           = "udplite6",
 110         .family         = AF_INET6,
 111         .hashtable      = udplite_hash,
 112         .seq_show       = udp6_seq_show,
 113         .seq_fops       = &udplite6_seq_fops,
 114 };
 115
 116 int __init udplite6_proc_init(void)
 117 {
 118         return udp_proc_register(&udplite6_seq_afinfo);
 119 }
 120
 121 void udplite6_proc_exit(void)
 122 {
 123         udp_proc_unregister(&udplite6_seq_afinfo);
 124 }
 125 #endif