132 lines
3.2 KiB
C
132 lines
3.2 KiB
C
/*
|
|
* UDPLITE An implementation of the UDP-Lite protocol (RFC 3828).
|
|
*
|
|
* Authors: Gerrit Renker <gerrit@erg.abdn.ac.uk>
|
|
*
|
|
* Changes:
|
|
* Fixes:
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the License, or (at your option) any later version.
|
|
*/
|
|
#include "udp_impl.h"
|
|
|
|
struct udp_table udplite_table __read_mostly;
|
|
EXPORT_SYMBOL(udplite_table);
|
|
|
|
static int udplite_rcv(struct sk_buff *skb)
|
|
{
|
|
return __udp4_lib_rcv(skb, &udplite_table, IPPROTO_UDPLITE);
|
|
}
|
|
|
|
static void udplite_err(struct sk_buff *skb, u32 info)
|
|
{
|
|
__udp4_lib_err(skb, info, &udplite_table);
|
|
}
|
|
|
|
static const struct net_protocol udplite_protocol = {
|
|
.handler = udplite_rcv,
|
|
.err_handler = udplite_err,
|
|
.no_policy = 1,
|
|
.netns_ok = 1,
|
|
};
|
|
|
|
struct proto udplite_prot = {
|
|
.name = "UDP-Lite",
|
|
.owner = THIS_MODULE,
|
|
.close = udp_lib_close,
|
|
.connect = ip4_datagram_connect,
|
|
.disconnect = udp_disconnect,
|
|
.ioctl = udp_ioctl,
|
|
.init = udplite_sk_init,
|
|
.destroy = udp_destroy_sock,
|
|
.setsockopt = udp_setsockopt,
|
|
.getsockopt = udp_getsockopt,
|
|
.sendmsg = udp_sendmsg,
|
|
.recvmsg = udp_recvmsg,
|
|
.sendpage = udp_sendpage,
|
|
.backlog_rcv = udp_queue_rcv_skb,
|
|
.hash = udp_lib_hash,
|
|
.unhash = udp_lib_unhash,
|
|
.get_port = udp_v4_get_port,
|
|
.obj_size = sizeof(struct udp_sock),
|
|
.slab_flags = SLAB_DESTROY_BY_RCU,
|
|
.h.udp_table = &udplite_table,
|
|
#ifdef CONFIG_COMPAT
|
|
.compat_setsockopt = compat_udp_setsockopt,
|
|
.compat_getsockopt = compat_udp_getsockopt,
|
|
#endif
|
|
};
|
|
|
|
static struct inet_protosw udplite4_protosw = {
|
|
.type = SOCK_DGRAM,
|
|
.protocol = IPPROTO_UDPLITE,
|
|
.prot = &udplite_prot,
|
|
.ops = &inet_dgram_ops,
|
|
.no_check = 0, /* must checksum (RFC 3828) */
|
|
.flags = INET_PROTOSW_PERMANENT,
|
|
};
|
|
|
|
#ifdef CONFIG_PROC_FS
|
|
static struct udp_seq_afinfo udplite4_seq_afinfo = {
|
|
.name = "udplite",
|
|
.family = AF_INET,
|
|
.udp_table = &udplite_table,
|
|
.seq_fops = {
|
|
.owner = THIS_MODULE,
|
|
},
|
|
.seq_ops = {
|
|
.show = udp4_seq_show,
|
|
},
|
|
};
|
|
|
|
static int __net_init udplite4_proc_init_net(struct net *net)
|
|
{
|
|
return udp_proc_register(net, &udplite4_seq_afinfo);
|
|
}
|
|
|
|
static void __net_exit udplite4_proc_exit_net(struct net *net)
|
|
{
|
|
udp_proc_unregister(net, &udplite4_seq_afinfo);
|
|
}
|
|
|
|
static struct pernet_operations udplite4_net_ops = {
|
|
.init = udplite4_proc_init_net,
|
|
.exit = udplite4_proc_exit_net,
|
|
};
|
|
|
|
static __init int udplite4_proc_init(void)
|
|
{
|
|
return register_pernet_subsys(&udplite4_net_ops);
|
|
}
|
|
#else
|
|
static inline int udplite4_proc_init(void)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
void __init udplite4_register(void)
|
|
{
|
|
udp_table_init(&udplite_table, "UDP-Lite");
|
|
if (proto_register(&udplite_prot, 1))
|
|
goto out_register_err;
|
|
|
|
if (inet_add_protocol(&udplite_protocol, IPPROTO_UDPLITE) < 0)
|
|
goto out_unregister_proto;
|
|
|
|
inet_register_protosw(&udplite4_protosw);
|
|
|
|
if (udplite4_proc_init())
|
|
printk(KERN_ERR "%s: Cannot register /proc!\n", __func__);
|
|
return;
|
|
|
|
out_unregister_proto:
|
|
proto_unregister(&udplite_prot);
|
|
out_register_err:
|
|
printk(KERN_CRIT "%s: Cannot add UDP-Lite protocol.\n", __func__);
|
|
}
|
|
|
|
EXPORT_SYMBOL(udplite_prot);
|