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 <linux/export.h>
  15 #include <linux/proc_fs.h>
  16 #include "udp_impl.h"
  17
  18 static int udplitev6_rcv(struct sk_buff *skb)
  19 {
  20         return __udp6_lib_rcv(skb, &udplite_table, IPPROTO_UDPLITE);
  21 }
  22
  23 static int udplitev6_err(struct sk_buff *skb,
  24                           struct inet6_skb_parm *opt,
  25                           u8 type, u8 code, int offset, __be32 info)
  26 {
  27         return __udp6_lib_err(skb, opt, type, code, offset, info,
  28                               &udplite_table);
  29 }
  30
  31 static const struct inet6_protocol udplitev6_protocol = {
  32         .handler        =       udplitev6_rcv,
  33         .err_handler    =       udplitev6_err,
  34         .flags          =       INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL,
  35 };
  36
  37 struct proto udplitev6_prot = {
  38         .name              = "UDPLITEv6",
  39         .owner             = THIS_MODULE,
  40         .close             = udp_lib_close,
  41         .connect           = ip6_datagram_connect,
  42         .disconnect        = udp_disconnect,
  43         .ioctl             = udp_ioctl,
  44         .init              = udplite_sk_init,
  45         .destroy           = udpv6_destroy_sock,
  46         .setsockopt        = udpv6_setsockopt,
  47         .getsockopt        = udpv6_getsockopt,
  48         .sendmsg           = udpv6_sendmsg,
  49         .recvmsg           = udpv6_recvmsg,
  50         .hash              = udp_lib_hash,
  51         .unhash            = udp_lib_unhash,
  52         .rehash            = udp_v6_rehash,
  53         .get_port          = udp_v6_get_port,
  54         .memory_allocated  = &udp_memory_allocated,
  55         .sysctl_mem        = sysctl_udp_mem,
  56         .obj_size          = sizeof(struct udp6_sock),
  57         .h.udp_table       = &udplite_table,
  58 #ifdef CONFIG_COMPAT
  59         .compat_setsockopt = compat_udpv6_setsockopt,
  60         .compat_getsockopt = compat_udpv6_getsockopt,
  61 #endif
  62 };
  63
  64 static struct inet_protosw udplite6_protosw = {
  65         .type           = SOCK_DGRAM,
  66         .protocol       = IPPROTO_UDPLITE,
  67         .prot           = &udplitev6_prot,
  68         .ops            = &inet6_dgram_ops,
  69         .flags          = INET_PROTOSW_PERMANENT,
  70 };
  71
  72 int __init udplitev6_init(void)
  73 {
  74         int ret;
  75
  76         ret = inet6_add_protocol(&udplitev6_protocol, IPPROTO_UDPLITE);
  77         if (ret)
  78                 goto out;
  79
  80         ret = inet6_register_protosw(&udplite6_protosw);
  81         if (ret)
  82                 goto out_udplitev6_protocol;
  83 out:
  84         return ret;
  85
  86 out_udplitev6_protocol:
  87         inet6_del_protocol(&udplitev6_protocol, IPPROTO_UDPLITE);
  88         goto out;
  89 }
  90
  91 void udplitev6_exit(void)
  92 {
  93         inet6_unregister_protosw(&udplite6_protosw);
  94         inet6_del_protocol(&udplitev6_protocol, IPPROTO_UDPLITE);
  95 }
  96
  97 #ifdef CONFIG_PROC_FS
  98 static struct udp_seq_afinfo udplite6_seq_afinfo = {
  99         .family         = AF_INET6,
 100         .udp_table      = &udplite_table,
 101 };
 102
 103 static int __net_init udplite6_proc_init_net(struct net *net)
 104 {
 105         if (!proc_create_net_data("udplite6", 0444, net->proc_net,
 106                         &udp6_seq_ops, sizeof(struct udp_iter_state),
 107                         &udplite6_seq_afinfo))
 108                 return -ENOMEM;
 109         return 0;
 110 }
 111
 112 static void __net_exit udplite6_proc_exit_net(struct net *net)
 113 {
 114         remove_proc_entry("udplite6", net->proc_net);
 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