| 1 |
62 |
marcus.erl |
/*
|
| 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];
|
| 19 |
|
|
|
| 20 |
|
|
int udplite_get_port(struct sock *sk, unsigned short p,
|
| 21 |
|
|
int (*c)(const struct sock *, const struct sock *))
|
| 22 |
|
|
{
|
| 23 |
|
|
return __udp_lib_get_port(sk, p, udplite_hash, c);
|
| 24 |
|
|
}
|
| 25 |
|
|
|
| 26 |
|
|
static int udplite_v4_get_port(struct sock *sk, unsigned short snum)
|
| 27 |
|
|
{
|
| 28 |
|
|
return udplite_get_port(sk, snum, ipv4_rcv_saddr_equal);
|
| 29 |
|
|
}
|
| 30 |
|
|
|
| 31 |
|
|
static int udplite_rcv(struct sk_buff *skb)
|
| 32 |
|
|
{
|
| 33 |
|
|
return __udp4_lib_rcv(skb, udplite_hash, IPPROTO_UDPLITE);
|
| 34 |
|
|
}
|
| 35 |
|
|
|
| 36 |
|
|
static void udplite_err(struct sk_buff *skb, u32 info)
|
| 37 |
|
|
{
|
| 38 |
|
|
return __udp4_lib_err(skb, info, udplite_hash);
|
| 39 |
|
|
}
|
| 40 |
|
|
|
| 41 |
|
|
static struct net_protocol udplite_protocol = {
|
| 42 |
|
|
.handler = udplite_rcv,
|
| 43 |
|
|
.err_handler = udplite_err,
|
| 44 |
|
|
.no_policy = 1,
|
| 45 |
|
|
};
|
| 46 |
|
|
|
| 47 |
|
|
DEFINE_PROTO_INUSE(udplite)
|
| 48 |
|
|
|
| 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
|
| 72 |
|
|
REF_PROTO_INUSE(udplite)
|
| 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() */
|
| 109 |
|
|
printk(KERN_ERR "%s: Cannot register /proc!\n", __FUNCTION__);
|
| 110 |
|
|
#endif
|
| 111 |
|
|
return;
|
| 112 |
|
|
|
| 113 |
|
|
out_unregister_proto:
|
| 114 |
|
|
proto_unregister(&udplite_prot);
|
| 115 |
|
|
out_register_err:
|
| 116 |
|
|
printk(KERN_CRIT "%s: Cannot add UDP-Lite protocol.\n", __FUNCTION__);
|
| 117 |
|
|
}
|
| 118 |
|
|
|
| 119 |
|
|
EXPORT_SYMBOL(udplite_hash);
|
| 120 |
|
|
EXPORT_SYMBOL(udplite_prot);
|
| 121 |
|
|
EXPORT_SYMBOL(udplite_get_port);
|
