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