[deliverable/linux.git] / net / ipv4 / udplite.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];

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,
	.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),
	.h.udp_hash	   = udplite_hash,
#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,
	.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,
};

static int udplite4_proc_init_net(struct net *net)
{
	return udp_proc_register(net, &udplite4_seq_afinfo);
}

static void 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)
{
	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_hash);
EXPORT_SYMBOL(udplite_prot);
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	static int udplite_rcv(struct sk_buff *skb)
ba4e58ec	21	{
759e5d00	22	return __udp4_lib_rcv(skb, udplite_hash, IPPROTO_UDPLITE);
ba4e58ec GR	23	}
ba4e58ec GR	24
f5b99bcd	25	static void udplite_err(struct sk_buff *skb, u32 info)
ba4e58ec	26	{
fc80be87	27	__udp4_lib_err(skb, info, udplite_hash);
ba4e58ec GR	28	}
	29
	30	static struct net_protocol udplite_protocol = {
	31	.handler = udplite_rcv,
	32	.err_handler = udplite_err,
	33	.no_policy = 1,
92f1fecb	34	.netns_ok = 1,
ba4e58ec GR	35	};
	36
	37	struct proto udplite_prot = {
	38	.name = "UDP-Lite",
	39	.owner = THIS_MODULE,
	40	.close = udp_lib_close,
	41	.connect = ip4_datagram_connect,
	42	.disconnect = udp_disconnect,
	43	.ioctl = udp_ioctl,
	44	.init = udplite_sk_init,
	45	.destroy = udp_destroy_sock,
	46	.setsockopt = udp_setsockopt,
	47	.getsockopt = udp_getsockopt,
	48	.sendmsg = udp_sendmsg,
	49	.recvmsg = udp_recvmsg,
	50	.sendpage = udp_sendpage,
	51	.backlog_rcv = udp_queue_rcv_skb,
	52	.hash = udp_lib_hash,
	53	.unhash = udp_lib_unhash,
6ba5a3c5	54	.get_port = udp_v4_get_port,
ba4e58ec	55	.obj_size = sizeof(struct udp_sock),
6ba5a3c5	56	.h.udp_hash = udplite_hash,
ba4e58ec GR	57	#ifdef CONFIG_COMPAT
	58	.compat_setsockopt = compat_udp_setsockopt,
	59	.compat_getsockopt = compat_udp_getsockopt,
	60	#endif
	61	};
	62
	63	static struct inet_protosw udplite4_protosw = {
	64	.type = SOCK_DGRAM,
	65	.protocol = IPPROTO_UDPLITE,
	66	.prot = &udplite_prot,
	67	.ops = &inet_dgram_ops,
	68	.capability = -1,
	69	.no_check = 0, /* must checksum (RFC 3828) */
	70	.flags = INET_PROTOSW_PERMANENT,
	71	};
	72
	73	#ifdef CONFIG_PROC_FS
	74	static struct file_operations udplite4_seq_fops;
	75	static struct udp_seq_afinfo udplite4_seq_afinfo = {
	76	.owner = THIS_MODULE,
	77	.name = "udplite",
	78	.family = AF_INET,
	79	.hashtable = udplite_hash,
	80	.seq_show = udp4_seq_show,
	81	.seq_fops = &udplite4_seq_fops,
	82	};
ff2bac6a	83
84c375af PE	84	static int udplite4_proc_init_net(struct net *net)
	85	{
	86	return udp_proc_register(net, &udplite4_seq_afinfo);
	87	}
	88
	89	static void udplite4_proc_exit_net(struct net *net)
	90	{
	91	udp_proc_unregister(net, &udplite4_seq_afinfo);
	92	}
	93
	94	static struct pernet_operations udplite4_net_ops = {
	95	.init = udplite4_proc_init_net,
	96	.exit = udplite4_proc_exit_net,
	97	};
	98
ff2bac6a PE	99	static __init int udplite4_proc_init(void)
ff2bac6a PE	100	{
84c375af	101	return register_pernet_subsys(&udplite4_net_ops);
ff2bac6a PE	102	}
	103	#else
	104	static inline int udplite4_proc_init(void)
	105	{
	106	return 0;
	107	}
ba4e58ec GR	108	#endif
	109
	110	void __init udplite4_register(void)
	111	{
	112	if (proto_register(&udplite_prot, 1))
	113	goto out_register_err;
	114
	115	if (inet_add_protocol(&udplite_protocol, IPPROTO_UDPLITE) < 0)
	116	goto out_unregister_proto;
	117
	118	inet_register_protosw(&udplite4_protosw);
	119
ff2bac6a	120	if (udplite4_proc_init())
0dc47877	121	printk(KERN_ERR "%s: Cannot register /proc!\n", __func__);
ba4e58ec GR	122	return;
	123
	124	out_unregister_proto:
	125	proto_unregister(&udplite_prot);
	126	out_register_err:
0dc47877	127	printk(KERN_CRIT "%s: Cannot add UDP-Lite protocol.\n", __func__);
ba4e58ec GR	128	}
	129
	130	EXPORT_SYMBOL(udplite_hash);
	131	EXPORT_SYMBOL(udplite_prot);