forked from Minki/linux
fc038410b4
__udp_lib_port_inuse() cannot make direct references to inet_sk(sk)->rcv_saddr as that is ipv4 specific state and this code is used by ipv6 too. Use an operations vector to solve this, and this also paves the way for ipv6 support for non-wild saddr hashing in UDP. Signed-off-by: David S. Miller <davem@davemloft.net>
121 lines
3.2 KiB
C
121 lines
3.2 KiB
C
/*
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* UDPLITE An implementation of the UDP-Lite protocol (RFC 3828).
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*
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* Version: $Id: udplite.c,v 1.25 2006/10/19 07:22:36 gerrit Exp $
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*
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* Authors: Gerrit Renker <gerrit@erg.abdn.ac.uk>
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*
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* Changes:
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* Fixes:
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include "udp_impl.h"
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DEFINE_SNMP_STAT(struct udp_mib, udplite_statistics) __read_mostly;
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struct hlist_head udplite_hash[UDP_HTABLE_SIZE];
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static int udplite_port_rover;
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int udplite_get_port(struct sock *sk, unsigned short p,
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const struct udp_get_port_ops *ops)
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{
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return __udp_lib_get_port(sk, p, udplite_hash,
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&udplite_port_rover, ops);
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}
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static int udplite_v4_get_port(struct sock *sk, unsigned short snum)
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{
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return udplite_get_port(sk, snum, &udp_ipv4_ops);
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}
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static int udplite_rcv(struct sk_buff *skb)
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{
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return __udp4_lib_rcv(skb, udplite_hash, IPPROTO_UDPLITE);
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}
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static void udplite_err(struct sk_buff *skb, u32 info)
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{
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return __udp4_lib_err(skb, info, udplite_hash);
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}
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static struct net_protocol udplite_protocol = {
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.handler = udplite_rcv,
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.err_handler = udplite_err,
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.no_policy = 1,
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};
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struct proto udplite_prot = {
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.name = "UDP-Lite",
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.owner = THIS_MODULE,
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.close = udp_lib_close,
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.connect = ip4_datagram_connect,
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.disconnect = udp_disconnect,
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.ioctl = udp_ioctl,
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.init = udplite_sk_init,
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.destroy = udp_destroy_sock,
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.setsockopt = udp_setsockopt,
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.getsockopt = udp_getsockopt,
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.sendmsg = udp_sendmsg,
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.recvmsg = udp_recvmsg,
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.sendpage = udp_sendpage,
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.backlog_rcv = udp_queue_rcv_skb,
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.hash = udp_lib_hash,
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.unhash = udp_lib_unhash,
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.get_port = udplite_v4_get_port,
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.obj_size = sizeof(struct udp_sock),
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#ifdef CONFIG_COMPAT
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.compat_setsockopt = compat_udp_setsockopt,
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.compat_getsockopt = compat_udp_getsockopt,
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#endif
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};
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static struct inet_protosw udplite4_protosw = {
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.type = SOCK_DGRAM,
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.protocol = IPPROTO_UDPLITE,
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.prot = &udplite_prot,
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.ops = &inet_dgram_ops,
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.capability = -1,
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.no_check = 0, /* must checksum (RFC 3828) */
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.flags = INET_PROTOSW_PERMANENT,
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};
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#ifdef CONFIG_PROC_FS
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static struct file_operations udplite4_seq_fops;
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static struct udp_seq_afinfo udplite4_seq_afinfo = {
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.owner = THIS_MODULE,
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.name = "udplite",
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.family = AF_INET,
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.hashtable = udplite_hash,
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.seq_show = udp4_seq_show,
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.seq_fops = &udplite4_seq_fops,
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};
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#endif
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void __init udplite4_register(void)
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{
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if (proto_register(&udplite_prot, 1))
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goto out_register_err;
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if (inet_add_protocol(&udplite_protocol, IPPROTO_UDPLITE) < 0)
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goto out_unregister_proto;
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inet_register_protosw(&udplite4_protosw);
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#ifdef CONFIG_PROC_FS
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if (udp_proc_register(&udplite4_seq_afinfo)) /* udplite4_proc_init() */
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printk(KERN_ERR "%s: Cannot register /proc!\n", __FUNCTION__);
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#endif
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return;
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out_unregister_proto:
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proto_unregister(&udplite_prot);
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out_register_err:
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printk(KERN_CRIT "%s: Cannot add UDP-Lite protocol.\n", __FUNCTION__);
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}
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EXPORT_SYMBOL(udplite_hash);
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EXPORT_SYMBOL(udplite_prot);
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EXPORT_SYMBOL(udplite_get_port);
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