[net-next-2.6.git] / net / ipv4 / udplite_ipv4.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);
Commit	Line	Data
ba4e58ec GR	1	/*
	2	* UDPLITE An implementation of the UDP-Lite protocol (RFC 3828).
	3	*
	4	* Version: $Id: udplite.c,v 1.25 2006/10/19 07:22:36 gerrit Exp $
	5	*
	6	* Authors: Gerrit Renker <gerrit@erg.abdn.ac.uk>
	7	*
	8	* Changes:
	9	* Fixes:
	10	* This program is free software; you can redistribute it and/or
	11	* modify it under the terms of the GNU General Public License
	12	* as published by the Free Software Foundation; either version
	13	* 2 of the License, or (at your option) any later version.
	14	*/
	15	#include "udp_impl.h"
	16	DEFINE_SNMP_STAT(struct udp_mib, udplite_statistics) __read_mostly;
	17
	18	struct hlist_head udplite_hash[UDP_HTABLE_SIZE];
ba4e58ec	19
f5b99bcd	20	int udplite_get_port(struct sock *sk, unsigned short p,
df2bc459	21	int (c)(const struct sock , const struct sock *))
ba4e58ec	22	{
32c1da70	23	return __udp_lib_get_port(sk, p, udplite_hash, c);
ba4e58ec GR	24	}
ba4e58ec GR	25
f5b99bcd	26	static int udplite_v4_get_port(struct sock *sk, unsigned short snum)
ba4e58ec	27	{
df2bc459	28	return udplite_get_port(sk, snum, ipv4_rcv_saddr_equal);
ba4e58ec GR	29	}
ba4e58ec GR	30
f5b99bcd	31	static int udplite_rcv(struct sk_buff *skb)
ba4e58ec	32	{
759e5d00	33	return __udp4_lib_rcv(skb, udplite_hash, IPPROTO_UDPLITE);
ba4e58ec GR	34	}
ba4e58ec GR	35
f5b99bcd	36	static void udplite_err(struct sk_buff *skb, u32 info)
ba4e58ec	37	{
fc80be87	38	__udp4_lib_err(skb, info, udplite_hash);
ba4e58ec GR	39	}
	40
	41	static struct net_protocol udplite_protocol = {
	42	.handler = udplite_rcv,
	43	.err_handler = udplite_err,
	44	.no_policy = 1,
	45	};
	46
47a31a6f ED	47	DEFINE_PROTO_INUSE(udplite)
47a31a6f ED	48
ba4e58ec GR	49	struct proto udplite_prot = {
	50	.name = "UDP-Lite",
	51	.owner = THIS_MODULE,
	52	.close = udp_lib_close,
	53	.connect = ip4_datagram_connect,
	54	.disconnect = udp_disconnect,
	55	.ioctl = udp_ioctl,
	56	.init = udplite_sk_init,
	57	.destroy = udp_destroy_sock,
	58	.setsockopt = udp_setsockopt,
	59	.getsockopt = udp_getsockopt,
	60	.sendmsg = udp_sendmsg,
	61	.recvmsg = udp_recvmsg,
	62	.sendpage = udp_sendpage,
	63	.backlog_rcv = udp_queue_rcv_skb,
	64	.hash = udp_lib_hash,
	65	.unhash = udp_lib_unhash,
	66	.get_port = udplite_v4_get_port,
	67	.obj_size = sizeof(struct udp_sock),
	68	#ifdef CONFIG_COMPAT
	69	.compat_setsockopt = compat_udp_setsockopt,
	70	.compat_getsockopt = compat_udp_getsockopt,
	71	#endif
47a31a6f	72	REF_PROTO_INUSE(udplite)
ba4e58ec GR	73	};
	74
	75	static struct inet_protosw udplite4_protosw = {
	76	.type = SOCK_DGRAM,
	77	.protocol = IPPROTO_UDPLITE,
	78	.prot = &udplite_prot,
	79	.ops = &inet_dgram_ops,
	80	.capability = -1,
	81	.no_check = 0, /* must checksum (RFC 3828) */
	82	.flags = INET_PROTOSW_PERMANENT,
	83	};
	84
	85	#ifdef CONFIG_PROC_FS
	86	static struct file_operations udplite4_seq_fops;
	87	static struct udp_seq_afinfo udplite4_seq_afinfo = {
	88	.owner = THIS_MODULE,
	89	.name = "udplite",
	90	.family = AF_INET,
	91	.hashtable = udplite_hash,
	92	.seq_show = udp4_seq_show,
	93	.seq_fops = &udplite4_seq_fops,
	94	};
	95	#endif
	96
	97	void __init udplite4_register(void)
	98	{
	99	if (proto_register(&udplite_prot, 1))
	100	goto out_register_err;
	101
	102	if (inet_add_protocol(&udplite_protocol, IPPROTO_UDPLITE) < 0)
	103	goto out_unregister_proto;
	104
	105	inet_register_protosw(&udplite4_protosw);
	106
	107	#ifdef CONFIG_PROC_FS
	108	if (udp_proc_register(&udplite4_seq_afinfo)) /* udplite4_proc_init() */
0dc47877	109	printk(KERN_ERR "%s: Cannot register /proc!\n", __func__);
ba4e58ec GR	110	#endif
	111	return;
	112
	113	out_unregister_proto:
	114	proto_unregister(&udplite_prot);
	115	out_register_err:
0dc47877	116	printk(KERN_CRIT "%s: Cannot add UDP-Lite protocol.\n", __func__);
ba4e58ec GR	117	}
	118
	119	EXPORT_SYMBOL(udplite_hash);
	120	EXPORT_SYMBOL(udplite_prot);
	121	EXPORT_SYMBOL(udplite_get_port);