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 "udp_impl.h"
  16
  17 static int udplitev6_rcv(struct sk_buff *skb)
  18 {
  19         return __udp6_lib_rcv(skb, &udplite_table, IPPROTO_UDPLITE);
  20 }
  21
  22 static void udplitev6_err(struct sk_buff *skb,
  23                           struct inet6_skb_parm *opt,
  24                           u8 type, u8 code, int offset, __be32 info)
  25 {
  26         __udp6_lib_err(skb, opt, type, code, offset, info, &udplite_table);
  27 }
  28
  29 static const struct inet6_protocol udplitev6_protocol = {
  30         .handler        =       udplitev6_rcv,
  31         .err_handler    =       udplitev6_err,
  32         .flags          =       INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL,
  33 };
  34
  35 struct proto udplitev6_prot = {
  36         .name              = "UDPLITEv6",
  37         .owner             = THIS_MODULE,
  38         .close             = udp_lib_close,
  39         .connect           = ip6_datagram_connect,
  40         .disconnect        = udp_disconnect,
  41         .ioctl             = udp_ioctl,
  42         .init              = udplite_sk_init,
  43         .destroy           = udpv6_destroy_sock,
  44         .setsockopt        = udpv6_setsockopt,
  45         .getsockopt        = udpv6_getsockopt,
  46         .sendmsg           = udpv6_sendmsg,
  47         .recvmsg           = udpv6_recvmsg,
  48         .backlog_rcv       = udpv6_queue_rcv_skb,
  49         .hash              = udp_lib_hash,
  50         .unhash            = udp_lib_unhash,
  51         .get_port          = udp_v6_get_port,
  52         .obj_size          = sizeof(struct udp6_sock),
  53         .slab_flags        = SLAB_DESTROY_BY_RCU,
  54         .h.udp_table       = &udplite_table,
  55 #ifdef CONFIG_COMPAT
  56         .compat_setsockopt = compat_udpv6_setsockopt,
  57         .compat_getsockopt = compat_udpv6_getsockopt,
  58 #endif
  59         .clear_sk          = sk_prot_clear_portaddr_nulls,
  60 };
  61
  62 static struct inet_protosw udplite6_protosw = {
  63         .type           = SOCK_DGRAM,
  64         .protocol       = IPPROTO_UDPLITE,
  65         .prot           = &udplitev6_prot,
  66         .ops            = &inet6_dgram_ops,
  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
  98 static const struct file_operations udplite6_afinfo_seq_fops = {
  99         .owner    = THIS_MODULE,
 100         .open     = udp_seq_open,
 101         .read     = seq_read,
 102         .llseek   = seq_lseek,
 103         .release  = seq_release_net
 104 };
 105
 106 static struct udp_seq_afinfo udplite6_seq_afinfo = {
 107         .name           = "udplite6",
 108         .family         = AF_INET6,
 109         .udp_table      = &udplite_table,
 110         .seq_fops       = &udplite6_afinfo_seq_fops,
 111         .seq_ops        = {
 112                 .show           = udp6_seq_show,
 113         },
 114 };
 115
 116 static int __net_init udplite6_proc_init_net(struct net *net)
 117 {
 118         return udp_proc_register(net, &udplite6_seq_afinfo);
 119 }
 120
 121 static void __net_exit udplite6_proc_exit_net(struct net *net)
 122 {
 123         udp_proc_unregister(net, &udplite6_seq_afinfo);
 124 }
 125
 126 static struct pernet_operations udplite6_net_ops = {
 127         .init = udplite6_proc_init_net,
 128         .exit = udplite6_proc_exit_net,
 129 };
 130
 131 int __init udplite6_proc_init(void)
 132 {
 133         return register_pernet_subsys(&udplite6_net_ops);
 134 }
 135
 136 void udplite6_proc_exit(void)
 137 {
 138         unregister_pernet_subsys(&udplite6_net_ops);
 139 }
 140 #endif