/* * 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 inet_sock * * Authors:	Many, reorganised here by * 		Arnaldo Carvalho de Melo <acme@mandriva.com> * *		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 _INET_SOCK_H#define _INET_SOCK_H  #include <linux/string.h>#include <linux/types.h> #include <net/flow.h>#include <net/sock.h>#include <net/request_sock.h> /** struct ip_options - IP Options * * @faddr - Saved first hop address * @is_setbyuser - Set by setsockopt? * @is_data - Options in __data, rather than skb * @is_strictroute - Strict source route * @srr_is_hit - Packet destination addr was our one * @is_changed - IP checksum more not valid * @rr_needaddr - Need to record addr of outgoing dev * @ts_needtime - Need to record timestamp * @ts_needaddr - Need to record addr of outgoing dev */struct ip_options {	__u32		faddr;	unsigned char	optlen;	unsigned char	srr;	unsigned char	rr;	unsigned char	ts;	unsigned char	is_setbyuser:1,			is_data:1,			is_strictroute:1,			srr_is_hit:1,			is_changed:1,			rr_needaddr:1,			ts_needtime:1,			ts_needaddr:1;	unsigned char	router_alert;	unsigned char	__pad1;	unsigned char	__pad2;	unsigned char	__data[0];}; #define optlength(opt) (sizeof(struct ip_options) + opt->optlen) struct inet_request_sock {	struct request_sock	req;#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)	u16			inet6_rsk_offset;	/* 2 bytes hole, try to pack */#endif	u32			loc_addr;	u32			rmt_addr;	u16			rmt_port;	u16			snd_wscale : 4, 				rcv_wscale : 4, 				tstamp_ok  : 1,				sack_ok	   : 1,				wscale_ok  : 1,				ecn_ok	   : 1,				acked	   : 1;	struct ip_options	*opt;}; static inline struct inet_request_sock *inet_rsk(const struct request_sock *sk){	return (struct inet_request_sock *)sk;} struct ip_mc_socklist;struct ipv6_pinfo;struct rtable; /** struct inet_sock - representation of INET sockets * * @sk - ancestor class * @pinet6 - pointer to IPv6 control block * @daddr - Foreign IPv4 addr * @rcv_saddr - Bound local IPv4 addr * @dport - Destination port * @num - Local port * @saddr - Sending source * @uc_ttl - Unicast TTL * @sport - Source port * @id - ID counter for DF pkts * @tos - TOS * @mc_ttl - Multicasting TTL * @is_icsk - is this an inet_connection_sock? * @mc_index - Multicast device index * @mc_list - Group array * @cork - info to build ip hdr on each ip frag while socket is corked */struct inet_sock {	/* sk and pinet6 has to be the first two members of inet_sock */	struct sock		sk;#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)	struct ipv6_pinfo	*pinet6;#endif	/* Socket demultiplex comparisons on incoming packets. */	__u32			daddr;	__u32			rcv_saddr;	__u16			dport;	__u16			num;	__u32			saddr;	__s16			uc_ttl;	__u16			cmsg_flags;	struct ip_options	*opt;	__u16			sport;	__u16			id;	__u8			tos;	__u8			mc_ttl;	__u8			pmtudisc;	__u8			recverr:1,				is_icsk:1,				freebind:1,				hdrincl:1,				mc_loop:1;	int			mc_index;	__u32			mc_addr;	struct ip_mc_socklist	*mc_list;	struct {		unsigned int		flags;		unsigned int		fragsize;		struct ip_options	*opt;		struct rtable		*rt;		int			length; /* Total length of all frames */		u32			addr;		struct flowi		fl;	} cork;}; #define IPCORK_OPT	1	/* ip-options has been held in ipcork.opt */#define IPCORK_ALLFRAG	2	/* always fragment (for ipv6 for now) */ static inline struct inet_sock *inet_sk(const struct sock *sk){	return (struct inet_sock *)sk;} static inline void __inet_sk_copy_descendant(struct sock *sk_to,					     const struct sock *sk_from,					     const int ancestor_size){	memcpy(inet_sk(sk_to) + 1, inet_sk(sk_from) + 1,	       sk_from->sk_prot->obj_size - ancestor_size);}#if !(defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE))static inline void inet_sk_copy_descendant(struct sock *sk_to,					   const struct sock *sk_from){	__inet_sk_copy_descendant(sk_to, sk_from, sizeof(struct inet_sock));}#endif extern int inet_sk_rebuild_header(struct sock *sk); static inline unsigned int inet_ehashfn(const __u32 laddr, const __u16 lport,					const __u32 faddr, const __u16 fport){	unsigned int h = (laddr ^ lport) ^ (faddr ^ fport);	h ^= h >> 16;	h ^= h >> 8;	return h;} static inline int inet_sk_ehashfn(const struct sock *sk){	const struct inet_sock *inet = inet_sk(sk);	const __u32 laddr = inet->rcv_saddr;	const __u16 lport = inet->num;	const __u32 faddr = inet->daddr;	const __u16 fport = inet->dport; 	return inet_ehashfn(laddr, lport, faddr, fport);} #endif	/* _INET_SOCK_H */