LXR linux/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
  18static int udplitev6_rcv(struct sk_buff *skb)
  19{
  20        return __udp6_lib_rcv(skb, &udplite_table, IPPROTO_UDPLITE);
  21}
  22
  23static void udplitev6_err(struct sk_buff *skb,
  24                          struct inet6_skb_parm *opt,
  25                          u8 type, u8 code, int offset, __be32 info)
  26{
  27        __udp6_lib_err(skb, opt, type, code, offset, info, &udplite_table);
  28}
  29
  30static const struct inet6_protocol udplitev6_protocol = {
  31        .handler        =       udplitev6_rcv,
  32        .err_handler    =       udplitev6_err,
  33        .flags          =       INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL,
  34};
  35
  36struct 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        .hash              = udp_lib_hash,
  50        .unhash            = udp_lib_unhash,
  51        .get_port          = udp_v6_get_port,
  52        .memory_allocated  = &udp_memory_allocated,
  53        .sysctl_mem        = sysctl_udp_mem,
  54        .obj_size          = sizeof(struct udp6_sock),
  55        .h.udp_table       = &udplite_table,
  56#ifdef CONFIG_COMPAT
  57        .compat_setsockopt = compat_udpv6_setsockopt,
  58        .compat_getsockopt = compat_udpv6_getsockopt,
  59#endif
  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        .flags          = INET_PROTOSW_PERMANENT,
  68};
  69
  70int __init udplitev6_init(void)
  71{
  72        int ret;
  73
  74        ret = inet6_add_protocol(&udplitev6_protocol, IPPROTO_UDPLITE);
  75        if (ret)
  76                goto out;
  77
  78        ret = inet6_register_protosw(&udplite6_protosw);
  79        if (ret)
  80                goto out_udplitev6_protocol;
  81out:
  82        return ret;
  83
  84out_udplitev6_protocol:
  85        inet6_del_protocol(&udplitev6_protocol, IPPROTO_UDPLITE);
  86        goto out;
  87}
  88
  89void udplitev6_exit(void)
  90{
  91        inet6_unregister_protosw(&udplite6_protosw);
  92        inet6_del_protocol(&udplitev6_protocol, IPPROTO_UDPLITE);
  93}
  94
  95#ifdef CONFIG_PROC_FS
  96static struct udp_seq_afinfo udplite6_seq_afinfo = {
  97        .family         = AF_INET6,
  98        .udp_table      = &udplite_table,
  99};
 100
 101static int __net_init udplite6_proc_init_net(struct net *net)
 102{
 103        if (!proc_create_net_data("udplite6", 0444, net->proc_net,
 104                        &udp6_seq_ops, sizeof(struct udp_iter_state),
 105                        &udplite6_seq_afinfo))
 106                return -ENOMEM;
 107        return 0;
 108}
 109
 110static void __net_exit udplite6_proc_exit_net(struct net *net)
 111{
 112        remove_proc_entry("udplite6", net->proc_net);
 113}
 114
 115static struct pernet_operations udplite6_net_ops = {
 116        .init = udplite6_proc_init_net,
 117        .exit = udplite6_proc_exit_net,
 118};
 119
 120int __init udplite6_proc_init(void)
 121{
 122        return register_pernet_subsys(&udplite6_net_ops);
 123}
 124
 125void udplite6_proc_exit(void)
 126{
 127        unregister_pernet_subsys(&udplite6_net_ops);
 128}
 129#endif
 130