cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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udplite.c (2957B)

      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};
     35
     36struct proto 	udplite_prot = {
     37	.name		   = "UDP-Lite",
     38	.owner		   = THIS_MODULE,
     39	.close		   = udp_lib_close,
     40	.connect	   = ip4_datagram_connect,
     41	.disconnect	   = udp_disconnect,
     42	.ioctl		   = udp_ioctl,
     43	.init		   = udplite_sk_init,
     44	.destroy	   = udp_destroy_sock,
     45	.setsockopt	   = udp_setsockopt,
     46	.getsockopt	   = udp_getsockopt,
     47	.sendmsg	   = udp_sendmsg,
     48	.recvmsg	   = udp_recvmsg,
     49	.sendpage	   = udp_sendpage,
     50	.hash		   = udp_lib_hash,
     51	.unhash		   = udp_lib_unhash,
     52	.rehash		   = udp_v4_rehash,
     53	.get_port	   = udp_v4_get_port,
     54	.memory_allocated  = &udp_memory_allocated,
     55	.sysctl_mem	   = sysctl_udp_mem,
     56	.obj_size	   = sizeof(struct udp_sock),
     57	.h.udp_table	   = &udplite_table,
     58};
     59EXPORT_SYMBOL(udplite_prot);
     60
     61static struct inet_protosw udplite4_protosw = {
     62	.type		=  SOCK_DGRAM,
     63	.protocol	=  IPPROTO_UDPLITE,
     64	.prot		=  &udplite_prot,
     65	.ops		=  &inet_dgram_ops,
     66	.flags		=  INET_PROTOSW_PERMANENT,
     67};
     68
     69#ifdef CONFIG_PROC_FS
     70static struct udp_seq_afinfo udplite4_seq_afinfo = {
     71	.family		= AF_INET,
     72	.udp_table 	= &udplite_table,
     73};
     74
     75static int __net_init udplite4_proc_init_net(struct net *net)
     76{
     77	if (!proc_create_net_data("udplite", 0444, net->proc_net, &udp_seq_ops,
     78			sizeof(struct udp_iter_state), &udplite4_seq_afinfo))
     79		return -ENOMEM;
     80	return 0;
     81}
     82
     83static void __net_exit udplite4_proc_exit_net(struct net *net)
     84{
     85	remove_proc_entry("udplite", net->proc_net);
     86}
     87
     88static struct pernet_operations udplite4_net_ops = {
     89	.init = udplite4_proc_init_net,
     90	.exit = udplite4_proc_exit_net,
     91};
     92
     93static __init int udplite4_proc_init(void)
     94{
     95	return register_pernet_subsys(&udplite4_net_ops);
     96}
     97#else
     98static inline int udplite4_proc_init(void)
     99{
    100	return 0;
    101}
    102#endif
    103
    104void __init udplite4_register(void)
    105{
    106	udp_table_init(&udplite_table, "UDP-Lite");
    107	if (proto_register(&udplite_prot, 1))
    108		goto out_register_err;
    109
    110	if (inet_add_protocol(&udplite_protocol, IPPROTO_UDPLITE) < 0)
    111		goto out_unregister_proto;
    112
    113	inet_register_protosw(&udplite4_protosw);
    114
    115	if (udplite4_proc_init())
    116		pr_err("%s: Cannot register /proc!\n", __func__);
    117	return;
    118
    119out_unregister_proto:
    120	proto_unregister(&udplite_prot);
    121out_register_err:
    122	pr_crit("%s: Cannot add UDP-Lite protocol\n", __func__);
    123}