udp.c File Reference

#include <asm/uaccess.h>
#include <asm/ioctls.h>
#include <linux/bootmem.h>
#include <linux/highmem.h>
#include <linux/swap.h>
#include <linux/types.h>
#include <linux/fcntl.h>
#include <linux/module.h>
#include <linux/socket.h>
#include <linux/sockios.h>
#include <linux/igmp.h>
#include <linux/in.h>
#include <linux/errno.h>
#include <linux/timer.h>
#include <linux/mm.h>
#include <linux/inet.h>
#include <linux/netdevice.h>
#include <linux/slab.h>
#include <net/tcp_states.h>
#include <linux/skbuff.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <net/net_namespace.h>
#include <net/icmp.h>
#include <net/route.h>
#include <net/checksum.h>
#include <net/xfrm.h>
#include <trace/events/udp.h>
#include <linux/static_key.h>
#include <trace/events/skb.h>
#include "udp_impl.h"

Go to the source code of this file.

Macros
#define	pr_fmt(fmt)   "UDP: " fmt
#define	MAX_UDP_PORTS   65536
#define	PORTS_PER_CHAIN   (MAX_UDP_PORTS / UDP_HTABLE_SIZE_MIN)
#define	SCORE2_MAX   (1 + 2 + 2 + 2)

Functions
	EXPORT_SYMBOL (udp_table)
	EXPORT_SYMBOL (sysctl_udp_mem)
	EXPORT_SYMBOL (sysctl_udp_rmem_min)
	EXPORT_SYMBOL (sysctl_udp_wmem_min)
	EXPORT_SYMBOL (udp_memory_allocated)
int	udp_lib_get_port (struct sock *sk, unsigned short snum, int(*saddr_comp)(const struct sock *sk1, const struct sock *sk2), unsigned int hash2_nulladdr)
	EXPORT_SYMBOL (udp_lib_get_port)
int	udp_v4_get_port (struct sock *sk, unsigned short snum)
struct sock *	__udp4_lib_lookup (struct net *net, __be32 saddr, __be16 sport, __be32 daddr, __be16 dport, int dif, struct udp_table *udptable)
	EXPORT_SYMBOL_GPL (__udp4_lib_lookup)
struct sock *	udp4_lib_lookup (struct net *net, __be32 saddr, __be16 sport, __be32 daddr, __be16 dport, int dif)
	EXPORT_SYMBOL_GPL (udp4_lib_lookup)
void	__udp4_lib_err (struct sk_buff *skb, u32 info, struct udp_table *udptable)
void	udp_err (struct sk_buff *skb, u32 info)
void	udp_flush_pending_frames (struct sock *sk)
	EXPORT_SYMBOL (udp_flush_pending_frames)
int	udp_sendmsg (struct kiocb *iocb, struct sock *sk, struct msghdr *msg, size_t len)
	EXPORT_SYMBOL (udp_sendmsg)
int	udp_sendpage (struct sock *sk, struct page *page, int offset, size_t size, int flags)
int	udp_ioctl (struct sock *sk, int cmd, unsigned long arg)
	EXPORT_SYMBOL (udp_ioctl)
int	udp_recvmsg (struct kiocb *iocb, struct sock *sk, struct msghdr *msg, size_t len, int noblock, int flags, int *addr_len)
int	udp_disconnect (struct sock *sk, int flags)
	EXPORT_SYMBOL (udp_disconnect)
void	udp_lib_unhash (struct sock *sk)
	EXPORT_SYMBOL (udp_lib_unhash)
void	udp_lib_rehash (struct sock *sk, u16 newhash)
	EXPORT_SYMBOL (udp_lib_rehash)
void	udp_encap_enable (void)
	EXPORT_SYMBOL (udp_encap_enable)
int	udp_queue_rcv_skb (struct sock *sk, struct sk_buff *skb)
int	__udp4_lib_rcv (struct sk_buff *skb, struct udp_table *udptable, int proto)
int	udp_rcv (struct sk_buff *skb)
void	udp_destroy_sock (struct sock *sk)
int	udp_lib_setsockopt (struct sock *sk, int level, int optname, char __user *optval, unsigned int optlen, int(*push_pending_frames)(struct sock *))
	EXPORT_SYMBOL (udp_lib_setsockopt)
int	udp_setsockopt (struct sock *sk, int level, int optname, char __user *optval, unsigned int optlen)
int	udp_lib_getsockopt (struct sock *sk, int level, int optname, char __user *optval, int __user *optlen)
	EXPORT_SYMBOL (udp_lib_getsockopt)
int	udp_getsockopt (struct sock *sk, int level, int optname, char __user *optval, int __user *optlen)
unsigned int	udp_poll (struct file *file, struct socket *sock, poll_table *wait)
	EXPORT_SYMBOL (udp_poll)
	EXPORT_SYMBOL (udp_prot)
	__setup ("uhash_entries=", set_uhash_entries)
void __init	udp_table_init (struct udp_table *table, const char *name)
void __init	udp_init (void)
int	udp4_ufo_send_check (struct sk_buff *skb)
struct sk_buff *	udp4_ufo_fragment (struct sk_buff *skb, netdev_features_t features)

Variables
struct udp_table udp_table	__read_mostly
atomic_long_t	udp_memory_allocated
struct proto	udp_prot

Macro Definition Documentation

#define MAX_UDP_PORTS   65536

Definition at line 129 of file udp.c.

#define PORTS_PER_CHAIN   (MAX_UDP_PORTS / UDP_HTABLE_SIZE_MIN)

Definition at line 130 of file udp.c.

#define pr_fmt

(

fmt

)

"UDP: " fmt

Definition at line 80 of file udp.c.

#define SCORE2_MAX   (1 + 2 + 2 + 2)

Definition at line 368 of file udp.c.

Function Documentation

__setup

(

)

void __udp4_lib_err	(	struct sk_buff *	skb,
		u32	info,
		struct udp_table *	udptable
	)

Definition at line 583 of file udp.c.

struct sock* __udp4_lib_lookup ( struct net *  net, __be32  saddr, __be16  sport, __be32  daddr, __be16  dport, int  dif, struct udp_table *  udptable  )

read

Definition at line 451 of file udp.c.

int __udp4_lib_rcv	(	struct sk_buff *	skb,
		struct udp_table *	udptable,
		int	proto
	)

Definition at line 1640 of file udp.c.

EXPORT_SYMBOL

(

udp_table

)

EXPORT_SYMBOL

(

sysctl_udp_mem

)

EXPORT_SYMBOL

(

sysctl_udp_rmem_min

)

EXPORT_SYMBOL

(

sysctl_udp_wmem_min

)

EXPORT_SYMBOL

(

udp_memory_allocated

)

EXPORT_SYMBOL

(

udp_lib_get_port

)

EXPORT_SYMBOL

(

udp_flush_pending_frames

)

EXPORT_SYMBOL

(

udp_sendmsg

)

EXPORT_SYMBOL

(

udp_ioctl

)

EXPORT_SYMBOL

(

udp_disconnect

)

EXPORT_SYMBOL

(

udp_lib_unhash

)

EXPORT_SYMBOL

(

udp_lib_rehash

)

EXPORT_SYMBOL

(

udp_encap_enable

)

EXPORT_SYMBOL

(

udp_lib_setsockopt

)

EXPORT_SYMBOL

(

udp_lib_getsockopt

)

EXPORT_SYMBOL

(

udp_poll

)

EXPORT_SYMBOL

(

udp_prot

)

EXPORT_SYMBOL_GPL

(

__udp4_lib_lookup

)

EXPORT_SYMBOL_GPL

(

udp4_lib_lookup

)

struct sock* udp4_lib_lookup ( struct net *  net, __be32  saddr, __be16  sport, __be32  daddr, __be16  dport, int  dif  )

read

Definition at line 535 of file udp.c.

struct sk_buff* udp4_ufo_fragment ( struct sk_buff *  skb, netdev_features_t  features  )

read

Definition at line 2266 of file udp.c.

int udp4_ufo_send_check

(

struct sk_buff *

skb

)

Definition at line 2247 of file udp.c.

void udp_destroy_sock

(

struct sock *

sk

)

Definition at line 1738 of file udp.c.

int udp_disconnect	(	struct sock *	sk,
		int	flags
	)

Definition at line 1277 of file udp.c.

void udp_encap_enable

(

void

)

Definition at line 1396 of file udp.c.

void udp_err	(	struct sk_buff *	skb,
		u32	info
	)

Definition at line 654 of file udp.c.

void udp_flush_pending_frames

(

struct sock *

sk

)

Definition at line 662 of file udp.c.

int udp_getsockopt	(	struct sock *	sk,
		int	level,
		int	optname,
		char __user *	optval,
		int __user *	optlen
	)

Definition at line 1896 of file udp.c.

void __init udp_init

(

void

)

Definition at line 2232 of file udp.c.

int udp_ioctl	(	struct sock *	sk,
		int	cmd,
		unsigned long	arg
	)

Definition at line 1132 of file udp.c.

int udp_lib_get_port	(	struct sock *	sk,
		unsigned short	snum,
		int(*)(const struct sock *sk1, const struct sock *sk2)	saddr_comp,
		unsigned int	hash2_nulladdr
	)

udp_lib_get_port - UDP/-Lite port lookup for IPv4 and IPv6

: socket struct in question : port number to look up : AF-dependent comparison of bound local IP addresses : AF-dependent hash value in secondary hash chains, with NULL address

Definition at line 199 of file udp.c.

int udp_lib_getsockopt	(	struct sock *	sk,
		int	level,
		int	optname,
		char __user *	optval,
		int __user *	optlen
	)

Definition at line 1851 of file udp.c.

void udp_lib_rehash	(	struct sock *	sk,
		u16	newhash
	)

Definition at line 1330 of file udp.c.

int udp_lib_setsockopt	(	struct sock *	sk,
		int	level,
		int	optname,
		char __user *	optval,
		unsigned int	optlen,
		int(*)(struct sock *)	push_pending_frames
	)

Definition at line 1748 of file udp.c.

void udp_lib_unhash

(

struct sock *

sk

)

Definition at line 1301 of file udp.c.

unsigned int udp_poll	(	struct file *	file,
		struct socket *	sock,
		poll_table *	wait
	)

Definition at line 1926 of file udp.c.

int udp_queue_rcv_skb	(	struct sock *	sk,
		struct sk_buff *	skb
	)

Definition at line 1411 of file udp.c.

int udp_rcv

(

struct sk_buff *

skb

)

Definition at line 1733 of file udp.c.

int udp_recvmsg	(	struct kiocb *	iocb,
		struct sock *	sk,
		struct msghdr *	msg,
		size_t	len,
		int	noblock,
		int	flags,
		int *	addr_len
	)

Definition at line 1170 of file udp.c.

int udp_sendmsg	(	struct kiocb *	iocb,
		struct sock *	sk,
		struct msghdr *	msg,
		size_t	len
	)

Definition at line 797 of file udp.c.

int udp_sendpage	(	struct sock *	sk,
		struct page *	page,
		int	offset,
		size_t	size,
		int	flags
	)

Definition at line 1040 of file udp.c.

int udp_setsockopt	(	struct sock *	sk,
		int	level,
		int	optname,
		char __user *	optval,
		unsigned int	optlen
	)

Definition at line 1831 of file udp.c.

void __init udp_table_init	(	struct udp_table *	table,
		const char *	name
	)

Definition at line 2205 of file udp.c.

int udp_v4_get_port	(	struct sock *	sk,
		unsigned short	snum
	)

Definition at line 318 of file udp.c.

Variable Documentation

struct static_key udp_encap_needed __read_mostly

Definition at line 114 of file udp.c.

atomic_long_t udp_memory_allocated

Definition at line 126 of file udp.c.

struct proto udp_prot

Definition at line 1941 of file udp.c.