2005-04-16 15:20:36 -07:00
|
|
|
/*
|
|
|
|
|
* 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
|
|
|
|
|
*
|
2005-05-05 16:16:16 -07:00
|
|
|
* Authors: Ross Biro
|
2005-04-16 15:20:36 -07:00
|
|
|
* 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 */
|
