linux/net/ipv6/udplite.c
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   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
  17static int udplitev6_rcv(struct sk_buff *skb)
  18{
  19        return __udp6_lib_rcv(skb, &udplite_table, IPPROTO_UDPLITE);
  20}
  21
  22static 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
  29static 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
  35struct 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
  62static 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
  71int __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;
  82out:
  83        return ret;
  84
  85out_udplitev6_protocol:
  86        inet6_del_protocol(&udplitev6_protocol, IPPROTO_UDPLITE);
  87        goto out;
  88}
  89
  90void 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
  98static 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
 106static 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
 116static int __net_init udplite6_proc_init_net(struct net *net)
 117{
 118        return udp_proc_register(net, &udplite6_seq_afinfo);
 119}
 120
 121static void __net_exit udplite6_proc_exit_net(struct net *net)
 122{
 123        udp_proc_unregister(net, &udplite6_seq_afinfo);
 124}
 125
 126static struct pernet_operations udplite6_net_ops = {
 127        .init = udplite6_proc_init_net,
 128        .exit = udplite6_proc_exit_net,
 129};
 130
 131int __init udplite6_proc_init(void)
 132{
 133        return register_pernet_subsys(&udplite6_net_ops);
 134}
 135
 136void udplite6_proc_exit(void)
 137{
 138        unregister_pernet_subsys(&udplite6_net_ops);
 139}
 140#endif
 141
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