Creation of Cybook 2416 (actually Gen4) repository
This commit is contained in:
mlt
179
include/net/udp.h
Normal file
179
include/net/udp.h
Normal file
@@ -0,0 +1,179 @@
|
||||
/*
|
||||
* 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/list.h>
|
||||
#include <net/inet_sock.h>
|
||||
#include <net/sock.h>
|
||||
#include <net/snmp.h>
|
||||
#include <net/ip.h>
|
||||
#include <linux/ipv6.h>
|
||||
#include <linux/seq_file.h>
|
||||
#include <linux/poll.h>
|
||||
|
||||
/**
|
||||
* struct udp_skb_cb - UDP(-Lite) private variables
|
||||
*
|
||||
* @header: private variables used by IPv4/IPv6
|
||||
* @cscov: checksum coverage length (UDP-Lite only)
|
||||
* @partial_cov: if set indicates partial csum coverage
|
||||
*/
|
||||
struct udp_skb_cb {
|
||||
union {
|
||||
struct inet_skb_parm h4;
|
||||
#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
|
||||
struct inet6_skb_parm h6;
|
||||
#endif
|
||||
} header;
|
||||
__u16 cscov;
|
||||
__u8 partial_cov;
|
||||
};
|
||||
#define UDP_SKB_CB(__skb) ((struct udp_skb_cb *)((__skb)->cb))
|
||||
|
||||
extern struct hlist_head udp_hash[UDP_HTABLE_SIZE];
|
||||
extern rwlock_t udp_hash_lock;
|
||||
|
||||
|
||||
/* 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;
|
||||
|
||||
struct sk_buff;
|
||||
|
||||
/*
|
||||
* Generic checksumming routines for UDP(-Lite) v4 and v6
|
||||
*/
|
||||
static inline __sum16 __udp_lib_checksum_complete(struct sk_buff *skb)
|
||||
{
|
||||
if (! UDP_SKB_CB(skb)->partial_cov)
|
||||
return __skb_checksum_complete(skb);
|
||||
return csum_fold(skb_checksum(skb, 0, UDP_SKB_CB(skb)->cscov,
|
||||
skb->csum));
|
||||
}
|
||||
|
||||
static inline int udp_lib_checksum_complete(struct sk_buff *skb)
|
||||
{
|
||||
return skb->ip_summed != CHECKSUM_UNNECESSARY &&
|
||||
__udp_lib_checksum_complete(skb);
|
||||
}
|
||||
|
||||
/**
|
||||
* udp_csum_outgoing - compute UDPv4/v6 checksum over fragments
|
||||
* @sk: socket we are writing to
|
||||
* @skb: sk_buff containing the filled-in UDP header
|
||||
* (checksum field must be zeroed out)
|
||||
*/
|
||||
static inline __wsum udp_csum_outgoing(struct sock *sk, struct sk_buff *skb)
|
||||
{
|
||||
__wsum csum = csum_partial(skb->h.raw, sizeof(struct udphdr), 0);
|
||||
|
||||
skb_queue_walk(&sk->sk_write_queue, skb) {
|
||||
csum = csum_add(csum, skb->csum);
|
||||
}
|
||||
return csum;
|
||||
}
|
||||
|
||||
/* hash routines shared between UDPv4/6 and UDP-Litev4/6 */
|
||||
static inline void udp_lib_hash(struct sock *sk)
|
||||
{
|
||||
BUG();
|
||||
}
|
||||
|
||||
static inline void udp_lib_unhash(struct sock *sk)
|
||||
{
|
||||
write_lock_bh(&udp_hash_lock);
|
||||
if (sk_del_node_init(sk)) {
|
||||
inet_sk(sk)->num = 0;
|
||||
sock_prot_dec_use(sk->sk_prot);
|
||||
}
|
||||
write_unlock_bh(&udp_hash_lock);
|
||||
}
|
||||
|
||||
static inline void udp_lib_close(struct sock *sk, long timeout)
|
||||
{
|
||||
sk_common_release(sk);
|
||||
}
|
||||
|
||||
|
||||
/* net/ipv4/udp.c */
|
||||
extern int udp_get_port(struct sock *sk, unsigned short snum,
|
||||
int (*saddr_cmp)(const struct sock *, const struct sock *));
|
||||
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);
|
||||
extern int udp_lib_getsockopt(struct sock *sk, int level, int optname,
|
||||
char __user *optval, int __user *optlen);
|
||||
extern int udp_lib_setsockopt(struct sock *sk, int level, int optname,
|
||||
char __user *optval, int optlen,
|
||||
int (*push_pending_frames)(struct sock *));
|
||||
|
||||
DECLARE_SNMP_STAT(struct udp_mib, udp_statistics);
|
||||
/*
|
||||
* SNMP statistics for UDP and UDP-Lite
|
||||
*/
|
||||
#define UDP_INC_STATS_USER(field, is_udplite) do { \
|
||||
if (is_udplite) SNMP_INC_STATS_USER(udplite_statistics, field); \
|
||||
else SNMP_INC_STATS_USER(udp_statistics, field); } while(0)
|
||||
#define UDP_INC_STATS_BH(field, is_udplite) do { \
|
||||
if (is_udplite) SNMP_INC_STATS_BH(udplite_statistics, field); \
|
||||
else SNMP_INC_STATS_BH(udp_statistics, field); } while(0)
|
||||
|
||||
/* /proc */
|
||||
struct udp_seq_afinfo {
|
||||
struct module *owner;
|
||||
char *name;
|
||||
sa_family_t family;
|
||||
struct hlist_head *hashtable;
|
||||
int (*seq_show) (struct seq_file *m, void *v);
|
||||
struct file_operations *seq_fops;
|
||||
};
|
||||
|
||||
struct udp_iter_state {
|
||||
sa_family_t family;
|
||||
struct hlist_head *hashtable;
|
||||
int bucket;
|
||||
struct seq_operations seq_ops;
|
||||
};
|
||||
|
||||
#ifdef CONFIG_PROC_FS
|
||||
extern int udp_proc_register(struct udp_seq_afinfo *afinfo);
|
||||
extern void udp_proc_unregister(struct udp_seq_afinfo *afinfo);
|
||||
|
||||
extern int udp4_proc_init(void);
|
||||
extern void udp4_proc_exit(void);
|
||||
#endif
|
||||
#endif /* _UDP_H */
|
||||
Reference in New Issue
Block a user