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										 |  |  | #ifndef _NET_DN_H
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							|  |  |  | #define _NET_DN_H
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							|  |  |  | 
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							|  |  |  | #include <linux/dn.h>
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							|  |  |  | #include <net/sock.h>
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										 |  |  | #include <net/flow.h>
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										 |  |  | #include <asm/byteorder.h>
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										 |  |  | #include <asm/unaligned.h>
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										 |  |  | 
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							|  |  |  | struct dn_scp                                   /* Session Control Port */ | 
					
						
							|  |  |  | { | 
					
						
							|  |  |  |         unsigned char           state; | 
					
						
							|  |  |  | #define DN_O     1                      /* Open                 */
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							|  |  |  | #define DN_CR    2                      /* Connect Receive      */
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							|  |  |  | #define DN_DR    3                      /* Disconnect Reject    */
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							|  |  |  | #define DN_DRC   4                      /* Discon. Rej. Complete*/
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							|  |  |  | #define DN_CC    5                      /* Connect Confirm      */
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							|  |  |  | #define DN_CI    6                      /* Connect Initiate     */
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							|  |  |  | #define DN_NR    7                      /* No resources         */
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							|  |  |  | #define DN_NC    8                      /* No communication     */
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							|  |  |  | #define DN_CD    9                      /* Connect Delivery     */
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							|  |  |  | #define DN_RJ    10                     /* Rejected             */
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							|  |  |  | #define DN_RUN   11                     /* Running              */
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							|  |  |  | #define DN_DI    12                     /* Disconnect Initiate  */
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							|  |  |  | #define DN_DIC   13                     /* Disconnect Complete  */
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							|  |  |  | #define DN_DN    14                     /* Disconnect Notificat */
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							|  |  |  | #define DN_CL    15                     /* Closed               */
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							|  |  |  | #define DN_CN    16                     /* Closed Notification  */
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										 |  |  |         __le16          addrloc; | 
					
						
							|  |  |  |         __le16          addrrem; | 
					
						
							|  |  |  |         __u16          numdat; | 
					
						
							|  |  |  |         __u16          numoth; | 
					
						
							|  |  |  |         __u16          numoth_rcv; | 
					
						
							|  |  |  |         __u16          numdat_rcv; | 
					
						
							|  |  |  |         __u16          ackxmt_dat; | 
					
						
							|  |  |  |         __u16          ackxmt_oth; | 
					
						
							|  |  |  |         __u16          ackrcv_dat; | 
					
						
							|  |  |  |         __u16          ackrcv_oth; | 
					
						
							|  |  |  |         __u8           flowrem_sw; | 
					
						
							|  |  |  | 	__u8           flowloc_sw; | 
					
						
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										 |  |  | #define DN_SEND         2
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							|  |  |  | #define DN_DONTSEND     1
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							|  |  |  | #define DN_NOCHANGE     0
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										 |  |  | 	__u16		flowrem_dat; | 
					
						
							|  |  |  | 	__u16		flowrem_oth; | 
					
						
							|  |  |  | 	__u16		flowloc_dat; | 
					
						
							|  |  |  | 	__u16		flowloc_oth; | 
					
						
							|  |  |  | 	__u8		services_rem; | 
					
						
							|  |  |  | 	__u8		services_loc; | 
					
						
							|  |  |  | 	__u8		info_rem; | 
					
						
							|  |  |  | 	__u8		info_loc; | 
					
						
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							|  |  |  | 	__u16		segsize_rem; | 
					
						
							|  |  |  | 	__u16		segsize_loc; | 
					
						
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							|  |  |  | 	__u8		nonagle; | 
					
						
							|  |  |  | 	__u8		multi_ireq; | 
					
						
							|  |  |  | 	__u8		accept_mode; | 
					
						
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										 |  |  | 	unsigned long		seg_total; /* Running total of current segment */ | 
					
						
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							|  |  |  | 	struct optdata_dn     conndata_in; | 
					
						
							|  |  |  | 	struct optdata_dn     conndata_out; | 
					
						
							|  |  |  | 	struct optdata_dn     discdata_in; | 
					
						
							|  |  |  | 	struct optdata_dn     discdata_out; | 
					
						
							|  |  |  |         struct accessdata_dn  accessdata; | 
					
						
							|  |  |  | 
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							|  |  |  |         struct sockaddr_dn addr; /* Local address  */ | 
					
						
							|  |  |  | 	struct sockaddr_dn peer; /* Remote address */ | 
					
						
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							|  |  |  | 	/*
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							|  |  |  | 	 * In this case the RTT estimation is not specified in the | 
					
						
							|  |  |  | 	 * docs, nor is any back off algorithm. Here we follow well | 
					
						
							|  |  |  | 	 * known tcp algorithms with a few small variations. | 
					
						
							|  |  |  | 	 * | 
					
						
							|  |  |  | 	 * snd_window: Max number of packets we send before we wait for | 
					
						
							|  |  |  | 	 *             an ack to come back. This will become part of a | 
					
						
							|  |  |  | 	 *             more complicated scheme when we support flow | 
					
						
							|  |  |  | 	 *             control. | 
					
						
							|  |  |  | 	 * | 
					
						
							|  |  |  | 	 * nsp_srtt:   Round-Trip-Time (x8) in jiffies. This is a rolling | 
					
						
							|  |  |  | 	 *             average. | 
					
						
							|  |  |  | 	 * nsp_rttvar: Round-Trip-Time-Varience (x4) in jiffies. This is the | 
					
						
							|  |  |  | 	 *             varience of the smoothed average (but calculated in | 
					
						
							|  |  |  | 	 *             a simpler way than for normal statistical varience | 
					
						
							|  |  |  | 	 *             calculations). | 
					
						
							|  |  |  | 	 * | 
					
						
							|  |  |  | 	 * nsp_rxtshift: Backoff counter. Value is zero normally, each time | 
					
						
							|  |  |  | 	 *               a packet is lost is increases by one until an ack | 
					
						
							|  |  |  | 	 *               is received. Its used to index an array of backoff | 
					
						
							|  |  |  | 	 *               multipliers. | 
					
						
							|  |  |  | 	 */ | 
					
						
							|  |  |  | #define NSP_MIN_WINDOW 1
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							|  |  |  | #define NSP_MAX_WINDOW (0x07fe)
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							|  |  |  | 	unsigned long max_window; | 
					
						
							|  |  |  | 	unsigned long snd_window; | 
					
						
							|  |  |  | #define NSP_INITIAL_SRTT (HZ)
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							|  |  |  | 	unsigned long nsp_srtt; | 
					
						
							|  |  |  | #define NSP_INITIAL_RTTVAR (HZ*3)
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							|  |  |  | 	unsigned long nsp_rttvar; | 
					
						
							|  |  |  | #define NSP_MAXRXTSHIFT 12
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							|  |  |  | 	unsigned long nsp_rxtshift; | 
					
						
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							|  |  |  | 	/*
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							|  |  |  | 	 * Output queues, one for data, one for otherdata/linkservice | 
					
						
							|  |  |  | 	 */ | 
					
						
							|  |  |  | 	struct sk_buff_head data_xmit_queue; | 
					
						
							|  |  |  | 	struct sk_buff_head other_xmit_queue; | 
					
						
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							|  |  |  | 	/*
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							|  |  |  | 	 * Input queue for other data | 
					
						
							|  |  |  | 	 */ | 
					
						
							|  |  |  | 	struct sk_buff_head other_receive_queue; | 
					
						
							|  |  |  | 	int other_report; | 
					
						
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							|  |  |  | 	/*
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							|  |  |  | 	 * Stuff to do with the slow timer | 
					
						
							|  |  |  | 	 */ | 
					
						
							|  |  |  | 	unsigned long stamp;          /* time of last transmit */ | 
					
						
							|  |  |  | 	unsigned long persist; | 
					
						
							|  |  |  | 	int (*persist_fxn)(struct sock *sk); | 
					
						
							|  |  |  | 	unsigned long keepalive; | 
					
						
							|  |  |  | 	void (*keepalive_fxn)(struct sock *sk); | 
					
						
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							|  |  |  | 	/*
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							|  |  |  | 	 * This stuff is for the fast timer for delayed acks | 
					
						
							|  |  |  | 	 */ | 
					
						
							|  |  |  | 	struct timer_list delack_timer; | 
					
						
							|  |  |  | 	int delack_pending; | 
					
						
							|  |  |  | 	void (*delack_fxn)(struct sock *sk); | 
					
						
							|  |  |  | 
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							|  |  |  | }; | 
					
						
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							|  |  |  | static inline struct dn_scp *DN_SK(struct sock *sk) | 
					
						
							|  |  |  | { | 
					
						
							|  |  |  | 	return (struct dn_scp *)(sk + 1); | 
					
						
							|  |  |  | } | 
					
						
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							|  |  |  | /*
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							|  |  |  |  * src,dst : Source and Destination DECnet addresses | 
					
						
							|  |  |  |  * hops : Number of hops through the network | 
					
						
							|  |  |  |  * dst_port, src_port : NSP port numbers | 
					
						
							|  |  |  |  * services, info : Useful data extracted from conninit messages | 
					
						
							|  |  |  |  * rt_flags : Routing flags byte | 
					
						
							|  |  |  |  * nsp_flags : NSP layer flags byte | 
					
						
							|  |  |  |  * segsize : Size of segment | 
					
						
							|  |  |  |  * segnum : Number, for data, otherdata and linkservice | 
					
						
							|  |  |  |  * xmit_count : Number of times we've transmitted this skb | 
					
						
							|  |  |  |  * stamp : Time stamp of most recent transmission, used in RTT calculations | 
					
						
							|  |  |  |  * iif: Input interface number | 
					
						
							|  |  |  |  * | 
					
						
							|  |  |  |  * As a general policy, this structure keeps all addresses in network | 
					
						
							|  |  |  |  * byte order, and all else in host byte order. Thus dst, src, dst_port | 
					
						
							|  |  |  |  * and src_port are in network order. All else is in host order. | 
					
						
							|  |  |  |  *  | 
					
						
							|  |  |  |  */ | 
					
						
							|  |  |  | #define DN_SKB_CB(skb) ((struct dn_skb_cb *)(skb)->cb)
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							|  |  |  | struct dn_skb_cb { | 
					
						
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										 |  |  | 	__le16 dst; | 
					
						
							|  |  |  | 	__le16 src; | 
					
						
							|  |  |  | 	__u16 hops; | 
					
						
							|  |  |  | 	__le16 dst_port; | 
					
						
							|  |  |  | 	__le16 src_port; | 
					
						
							|  |  |  | 	__u8 services; | 
					
						
							|  |  |  | 	__u8 info; | 
					
						
							|  |  |  | 	__u8 rt_flags; | 
					
						
							|  |  |  | 	__u8 nsp_flags; | 
					
						
							|  |  |  | 	__u16 segsize; | 
					
						
							|  |  |  | 	__u16 segnum; | 
					
						
							|  |  |  | 	__u16 xmit_count; | 
					
						
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										 |  |  | 	unsigned long stamp; | 
					
						
							|  |  |  | 	int iif; | 
					
						
							|  |  |  | }; | 
					
						
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										 |  |  | static inline __le16 dn_eth2dn(unsigned char *ethaddr) | 
					
						
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										 |  |  | { | 
					
						
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										 |  |  | 	return get_unaligned((__le16 *)(ethaddr + 4)); | 
					
						
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										 |  |  | } | 
					
						
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										 |  |  | static inline __le16 dn_saddr2dn(struct sockaddr_dn *saddr) | 
					
						
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										 |  |  | { | 
					
						
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										 |  |  | 	return *(__le16 *)saddr->sdn_nodeaddr; | 
					
						
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										 |  |  | } | 
					
						
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										 |  |  | static inline void dn_dn2eth(unsigned char *ethaddr, __le16 addr) | 
					
						
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										 |  |  | { | 
					
						
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										 |  |  | 	__u16 a = le16_to_cpu(addr); | 
					
						
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										 |  |  | 	ethaddr[0] = 0xAA; | 
					
						
							|  |  |  | 	ethaddr[1] = 0x00; | 
					
						
							|  |  |  | 	ethaddr[2] = 0x04; | 
					
						
							|  |  |  | 	ethaddr[3] = 0x00; | 
					
						
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										 |  |  | 	ethaddr[4] = (__u8)(a & 0xff); | 
					
						
							|  |  |  | 	ethaddr[5] = (__u8)(a >> 8); | 
					
						
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										 |  |  | } | 
					
						
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										 |  |  | static inline void dn_sk_ports_copy(struct flowidn *fld, struct dn_scp *scp) | 
					
						
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										 |  |  | { | 
					
						
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										 |  |  | 	fld->fld_sport = scp->addrloc; | 
					
						
							|  |  |  | 	fld->fld_dport = scp->addrrem; | 
					
						
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										 |  |  | } | 
					
						
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										 |  |  | unsigned int dn_mss_from_pmtu(struct net_device *dev, int mtu); | 
					
						
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										 |  |  | void dn_register_sysctl(void); | 
					
						
							|  |  |  | void dn_unregister_sysctl(void); | 
					
						
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							|  |  |  | #define DN_MENUVER_ACC 0x01
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							|  |  |  | #define DN_MENUVER_USR 0x02
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							|  |  |  | #define DN_MENUVER_PRX 0x04
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							|  |  |  | #define DN_MENUVER_UIC 0x08
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										 |  |  | struct sock *dn_sklist_find_listener(struct sockaddr_dn *addr); | 
					
						
							|  |  |  | struct sock *dn_find_by_skb(struct sk_buff *skb); | 
					
						
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										 |  |  | #define DN_ASCBUF_LEN 9
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										 |  |  | char *dn_addr2asc(__u16, char *); | 
					
						
							|  |  |  | int dn_destroy_timer(struct sock *sk); | 
					
						
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										 |  |  | int dn_sockaddr2username(struct sockaddr_dn *addr, unsigned char *buf, | 
					
						
							|  |  |  | 			 unsigned char type); | 
					
						
							|  |  |  | int dn_username2sockaddr(unsigned char *data, int len, struct sockaddr_dn *addr, | 
					
						
							|  |  |  | 			 unsigned char *type); | 
					
						
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										 |  |  | void dn_start_slow_timer(struct sock *sk); | 
					
						
							|  |  |  | void dn_stop_slow_timer(struct sock *sk); | 
					
						
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										 |  |  | extern __le16 decnet_address; | 
					
						
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										 |  |  | extern int decnet_debug_level; | 
					
						
							|  |  |  | extern int decnet_time_wait; | 
					
						
							|  |  |  | extern int decnet_dn_count; | 
					
						
							|  |  |  | extern int decnet_di_count; | 
					
						
							|  |  |  | extern int decnet_dr_count; | 
					
						
							|  |  |  | extern int decnet_no_fc_max_cwnd; | 
					
						
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										 |  |  | extern long sysctl_decnet_mem[3]; | 
					
						
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										 |  |  | extern int sysctl_decnet_wmem[3]; | 
					
						
							|  |  |  | extern int sysctl_decnet_rmem[3]; | 
					
						
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										 |  |  | #endif /* _NET_DN_H */
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