db8dac20d5
This reverts commitdb1ed684f6("[IPV6] UDP: Rename IPv6 UDP files."), commit8be8af8fa4("[IPV4] UDP: Move IPv4-specific bits to other file.") and commite898d4db27("[UDP]: Allow users to configure UDP-Lite."). First, udplite is of such small cost, and it is a core protocol just like TCP and normal UDP are. We spent enormous amounts of effort to make udplite share as much code with core UDP as possible. All of that work is less valuable if we're just going to slap a config option on udplite support. It is also causing build failures, as reported on linux-next, showing that the changeset was not tested very well. In fact, this is the second build failure resulting from the udplite change. Finally, the config options provided was a bool, instead of a modular option. Meaning the udplite code does not even get build tested by allmodconfig builds, and furthermore the user is not presented with a reasonable modular build option which is particularly needed by distribution vendors. Signed-off-by: David S. Miller <davem@davemloft.net>
122 lines
3.2 KiB
C
122 lines
3.2 KiB
C
/*
|
|
* UDPLITE An implementation of the UDP-Lite protocol (RFC 3828).
|
|
*
|
|
* Version: $Id: udplite.c,v 1.25 2006/10/19 07:22:36 gerrit Exp $
|
|
*
|
|
* 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"
|
|
DEFINE_SNMP_STAT(struct udp_mib, udplite_statistics) __read_mostly;
|
|
|
|
struct hlist_head udplite_hash[UDP_HTABLE_SIZE];
|
|
|
|
int udplite_get_port(struct sock *sk, unsigned short p,
|
|
int (*c)(const struct sock *, const struct sock *))
|
|
{
|
|
return __udp_lib_get_port(sk, p, udplite_hash, c);
|
|
}
|
|
|
|
static int udplite_v4_get_port(struct sock *sk, unsigned short snum)
|
|
{
|
|
return udplite_get_port(sk, snum, ipv4_rcv_saddr_equal);
|
|
}
|
|
|
|
static int udplite_rcv(struct sk_buff *skb)
|
|
{
|
|
return __udp4_lib_rcv(skb, udplite_hash, IPPROTO_UDPLITE);
|
|
}
|
|
|
|
static void udplite_err(struct sk_buff *skb, u32 info)
|
|
{
|
|
__udp4_lib_err(skb, info, udplite_hash);
|
|
}
|
|
|
|
static struct net_protocol udplite_protocol = {
|
|
.handler = udplite_rcv,
|
|
.err_handler = udplite_err,
|
|
.no_policy = 1,
|
|
};
|
|
|
|
DEFINE_PROTO_INUSE(udplite)
|
|
|
|
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 = udplite_v4_get_port,
|
|
.obj_size = sizeof(struct udp_sock),
|
|
#ifdef CONFIG_COMPAT
|
|
.compat_setsockopt = compat_udp_setsockopt,
|
|
.compat_getsockopt = compat_udp_getsockopt,
|
|
#endif
|
|
REF_PROTO_INUSE(udplite)
|
|
};
|
|
|
|
static struct inet_protosw udplite4_protosw = {
|
|
.type = SOCK_DGRAM,
|
|
.protocol = IPPROTO_UDPLITE,
|
|
.prot = &udplite_prot,
|
|
.ops = &inet_dgram_ops,
|
|
.capability = -1,
|
|
.no_check = 0, /* must checksum (RFC 3828) */
|
|
.flags = INET_PROTOSW_PERMANENT,
|
|
};
|
|
|
|
#ifdef CONFIG_PROC_FS
|
|
static struct file_operations udplite4_seq_fops;
|
|
static struct udp_seq_afinfo udplite4_seq_afinfo = {
|
|
.owner = THIS_MODULE,
|
|
.name = "udplite",
|
|
.family = AF_INET,
|
|
.hashtable = udplite_hash,
|
|
.seq_show = udp4_seq_show,
|
|
.seq_fops = &udplite4_seq_fops,
|
|
};
|
|
#endif
|
|
|
|
void __init udplite4_register(void)
|
|
{
|
|
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);
|
|
|
|
#ifdef CONFIG_PROC_FS
|
|
if (udp_proc_register(&udplite4_seq_afinfo)) /* udplite4_proc_init() */
|
|
printk(KERN_ERR "%s: Cannot register /proc!\n", __func__);
|
|
#endif
|
|
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_hash);
|
|
EXPORT_SYMBOL(udplite_prot);
|
|
EXPORT_SYMBOL(udplite_get_port);
|