1// SPDX-License-Identifier: GPL-2.0-or-later
  2/*
  3 *  UDPLITE     An implementation of the UDP-Lite protocol (RFC 3828).
  4 *
  5 *  Authors:    Gerrit Renker       <gerrit@erg.abdn.ac.uk>
  6 *
  7 *  Changes:
  8 *  Fixes:
 
 
 
 
  9 */
 10
 11#define pr_fmt(fmt) "UDPLite: " fmt
 12
 13#include <linux/export.h>
 14#include <linux/proc_fs.h>
 15#include "udp_impl.h"
 16
 17struct udp_table 	udplite_table __read_mostly;
 18EXPORT_SYMBOL(udplite_table);
 19
 20static int udplite_rcv(struct sk_buff *skb)
 21{
 22	return __udp4_lib_rcv(skb, &udplite_table, IPPROTO_UDPLITE);
 23}
 24
 25static int udplite_err(struct sk_buff *skb, u32 info)
 26{
 27	return __udp4_lib_err(skb, info, &udplite_table);
 28}
 29
 30static const struct net_protocol udplite_protocol = {
 31	.handler	= udplite_rcv,
 32	.err_handler	= udplite_err,
 33	.no_policy	= 1,
 34	.netns_ok	= 1,
 35};
 36
 37struct 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	.hash		   = udp_lib_hash,
 52	.unhash		   = udp_lib_unhash,
 53	.rehash		   = udp_v4_rehash,
 54	.get_port	   = udp_v4_get_port,
 55	.memory_allocated  = &udp_memory_allocated,
 56	.sysctl_mem	   = sysctl_udp_mem,
 57	.obj_size	   = sizeof(struct udp_sock),
 
 58	.h.udp_table	   = &udplite_table,
 
 
 
 
 
 59};
 60EXPORT_SYMBOL(udplite_prot);
 61
 62static struct inet_protosw udplite4_protosw = {
 63	.type		=  SOCK_DGRAM,
 64	.protocol	=  IPPROTO_UDPLITE,
 65	.prot		=  &udplite_prot,
 66	.ops		=  &inet_dgram_ops,
 
 67	.flags		=  INET_PROTOSW_PERMANENT,
 68};
 69
 70#ifdef CONFIG_PROC_FS
 71static struct udp_seq_afinfo udplite4_seq_afinfo = {
 
 72	.family		= AF_INET,
 73	.udp_table 	= &udplite_table,
 
 
 
 
 
 
 74};
 75
 76static int __net_init udplite4_proc_init_net(struct net *net)
 77{
 78	if (!proc_create_net_data("udplite", 0444, net->proc_net, &udp_seq_ops,
 79			sizeof(struct udp_iter_state), &udplite4_seq_afinfo))
 80		return -ENOMEM;
 81	return 0;
 82}
 83
 84static void __net_exit udplite4_proc_exit_net(struct net *net)
 85{
 86	remove_proc_entry("udplite", net->proc_net);
 87}
 88
 89static struct pernet_operations udplite4_net_ops = {
 90	.init = udplite4_proc_init_net,
 91	.exit = udplite4_proc_exit_net,
 92};
 93
 94static __init int udplite4_proc_init(void)
 95{
 96	return register_pernet_subsys(&udplite4_net_ops);
 97}
 98#else
 99static inline int udplite4_proc_init(void)
100{
101	return 0;
102}
103#endif
104
105void __init udplite4_register(void)
106{
107	udp_table_init(&udplite_table, "UDP-Lite");
108	if (proto_register(&udplite_prot, 1))
109		goto out_register_err;
110
111	if (inet_add_protocol(&udplite_protocol, IPPROTO_UDPLITE) < 0)
112		goto out_unregister_proto;
113
114	inet_register_protosw(&udplite4_protosw);
115
116	if (udplite4_proc_init())
117		pr_err("%s: Cannot register /proc!\n", __func__);
118	return;
119
120out_unregister_proto:
121	proto_unregister(&udplite_prot);
122out_register_err:
123	pr_crit("%s: Cannot add UDP-Lite protocol\n", __func__);
124}

 
  1/*
  2 *  UDPLITE     An implementation of the UDP-Lite protocol (RFC 3828).
  3 *
  4 *  Authors:    Gerrit Renker       <gerrit@erg.abdn.ac.uk>
  5 *
  6 *  Changes:
  7 *  Fixes:
  8 *		This program is free software; you can redistribute it and/or
  9 *		modify it under the terms of the GNU General Public License
 10 *		as published by the Free Software Foundation; either version
 11 *		2 of the License, or (at your option) any later version.
 12 */
 
 
 
 
 
 13#include "udp_impl.h"
 14
 15struct udp_table 	udplite_table __read_mostly;
 16EXPORT_SYMBOL(udplite_table);
 17
 18static int udplite_rcv(struct sk_buff *skb)
 19{
 20	return __udp4_lib_rcv(skb, &udplite_table, IPPROTO_UDPLITE);
 21}
 22
 23static void udplite_err(struct sk_buff *skb, u32 info)
 24{
 25	__udp4_lib_err(skb, info, &udplite_table);
 26}
 27
 28static const struct net_protocol udplite_protocol = {
 29	.handler	= udplite_rcv,
 30	.err_handler	= udplite_err,
 31	.no_policy	= 1,
 32	.netns_ok	= 1,
 33};
 34
 35struct proto 	udplite_prot = {
 36	.name		   = "UDP-Lite",
 37	.owner		   = THIS_MODULE,
 38	.close		   = udp_lib_close,
 39	.connect	   = ip4_datagram_connect,
 40	.disconnect	   = udp_disconnect,
 41	.ioctl		   = udp_ioctl,
 42	.init		   = udplite_sk_init,
 43	.destroy	   = udp_destroy_sock,
 44	.setsockopt	   = udp_setsockopt,
 45	.getsockopt	   = udp_getsockopt,
 46	.sendmsg	   = udp_sendmsg,
 47	.recvmsg	   = udp_recvmsg,
 48	.sendpage	   = udp_sendpage,
 49	.backlog_rcv	   = udp_queue_rcv_skb,
 50	.hash		   = udp_lib_hash,
 51	.unhash		   = udp_lib_unhash,
 
 52	.get_port	   = udp_v4_get_port,
 
 
 53	.obj_size	   = sizeof(struct udp_sock),
 54	.slab_flags	   = SLAB_DESTROY_BY_RCU,
 55	.h.udp_table	   = &udplite_table,
 56#ifdef CONFIG_COMPAT
 57	.compat_setsockopt = compat_udp_setsockopt,
 58	.compat_getsockopt = compat_udp_getsockopt,
 59#endif
 60	.clear_sk	   = sk_prot_clear_portaddr_nulls,
 61};
 62EXPORT_SYMBOL(udplite_prot);
 63
 64static struct inet_protosw udplite4_protosw = {
 65	.type		=  SOCK_DGRAM,
 66	.protocol	=  IPPROTO_UDPLITE,
 67	.prot		=  &udplite_prot,
 68	.ops		=  &inet_dgram_ops,
 69	.no_check	=  0,		/* must checksum (RFC 3828) */
 70	.flags		=  INET_PROTOSW_PERMANENT,
 71};
 72
 73#ifdef CONFIG_PROC_FS
 74static struct udp_seq_afinfo udplite4_seq_afinfo = {
 75	.name		= "udplite",
 76	.family		= AF_INET,
 77	.udp_table 	= &udplite_table,
 78	.seq_fops	= {
 79		.owner	=	THIS_MODULE,
 80	},
 81	.seq_ops	= {
 82		.show		= udp4_seq_show,
 83	},
 84};
 85
 86static int __net_init udplite4_proc_init_net(struct net *net)
 87{
 88	return udp_proc_register(net, &udplite4_seq_afinfo);
 
 
 
 89}
 90
 91static void __net_exit udplite4_proc_exit_net(struct net *net)
 92{
 93	udp_proc_unregister(net, &udplite4_seq_afinfo);
 94}
 95
 96static struct pernet_operations udplite4_net_ops = {
 97	.init = udplite4_proc_init_net,
 98	.exit = udplite4_proc_exit_net,
 99};
100
101static __init int udplite4_proc_init(void)
102{
103	return register_pernet_subsys(&udplite4_net_ops);
104}
105#else
106static inline int udplite4_proc_init(void)
107{
108	return 0;
109}
110#endif
111
112void __init udplite4_register(void)
113{
114	udp_table_init(&udplite_table, "UDP-Lite");
115	if (proto_register(&udplite_prot, 1))
116		goto out_register_err;
117
118	if (inet_add_protocol(&udplite_protocol, IPPROTO_UDPLITE) < 0)
119		goto out_unregister_proto;
120
121	inet_register_protosw(&udplite4_protosw);
122
123	if (udplite4_proc_init())
124		printk(KERN_ERR "%s: Cannot register /proc!\n", __func__);
125	return;
126
127out_unregister_proto:
128	proto_unregister(&udplite_prot);
129out_register_err:
130	printk(KERN_CRIT "%s: Cannot add UDP-Lite protocol.\n", __func__);
131}