2005-04-17 06:20:36 +08:00
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/*
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* INET An implementation of the TCP/IP protocol suite for the LINUX
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* operating system. INET is implemented using the BSD Socket
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* interface as the means of communication with the user level.
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*
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* Definitions for the UDP module.
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*
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* Version: @(#)udp.h 1.0.2 05/07/93
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*
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2005-05-06 07:16:16 +08:00
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* Authors: Ross Biro
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2005-04-17 06:20:36 +08:00
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* Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
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*
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* Fixes:
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* Alan Cox : Turned on udp checksums. I don't want to
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* chase 'memory corruption' bugs that aren't!
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*
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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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#ifndef _UDP_H
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#define _UDP_H
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#include <linux/udp.h>
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#include <linux/ip.h>
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#include <linux/list.h>
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#include <net/sock.h>
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#include <net/snmp.h>
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#include <linux/seq_file.h>
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#define UDP_HTABLE_SIZE 128
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/* udp.c: This needs to be shared by v4 and v6 because the lookup
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* and hashing code needs to work with different AF's yet
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* the port space is shared.
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*/
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extern struct hlist_head udp_hash[UDP_HTABLE_SIZE];
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extern rwlock_t udp_hash_lock;
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extern int udp_port_rover;
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static inline int udp_lport_inuse(u16 num)
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{
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struct sock *sk;
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struct hlist_node *node;
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sk_for_each(sk, node, &udp_hash[num & (UDP_HTABLE_SIZE - 1)])
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if (inet_sk(sk)->num == num)
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return 1;
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return 0;
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}
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/* Note: this must match 'valbool' in sock_setsockopt */
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#define UDP_CSUM_NOXMIT 1
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/* Used by SunRPC/xprt layer. */
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#define UDP_CSUM_NORCV 2
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/* Default, as per the RFC, is to always do csums. */
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#define UDP_CSUM_DEFAULT 0
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extern struct proto udp_prot;
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extern void udp_err(struct sk_buff *, u32);
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extern int udp_sendmsg(struct kiocb *iocb, struct sock *sk,
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struct msghdr *msg, size_t len);
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extern int udp_rcv(struct sk_buff *skb);
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extern int udp_ioctl(struct sock *sk, int cmd, unsigned long arg);
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extern int udp_disconnect(struct sock *sk, int flags);
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extern unsigned int udp_poll(struct file *file, struct socket *sock,
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poll_table *wait);
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DECLARE_SNMP_STAT(struct udp_mib, udp_statistics);
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#define UDP_INC_STATS(field) SNMP_INC_STATS(udp_statistics, field)
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#define UDP_INC_STATS_BH(field) SNMP_INC_STATS_BH(udp_statistics, field)
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#define UDP_INC_STATS_USER(field) SNMP_INC_STATS_USER(udp_statistics, field)
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/* /proc */
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struct udp_seq_afinfo {
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struct module *owner;
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char *name;
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sa_family_t family;
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int (*seq_show) (struct seq_file *m, void *v);
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struct file_operations *seq_fops;
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};
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struct udp_iter_state {
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sa_family_t family;
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int bucket;
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struct seq_operations seq_ops;
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};
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extern int udp_proc_register(struct udp_seq_afinfo *afinfo);
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extern void udp_proc_unregister(struct udp_seq_afinfo *afinfo);
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#endif /* _UDP_H */
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