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#ifndef _NET_DN_NSP_H
#define _NET_DN_NSP_H
/******************************************************************************
    (c) 1995-1998 E.M. Serrat		emserrat@geocities.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
    any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
*******************************************************************************/
/* dn_nsp.c functions prototyping */

void dn_nsp_send_data_ack(struct sock *sk);
void dn_nsp_send_oth_ack(struct sock *sk);
void dn_send_conn_ack(struct sock *sk);
void dn_send_conn_conf(struct sock *sk, gfp_t gfp);
void dn_nsp_send_disc(struct sock *sk, unsigned char type,
		      unsigned short reason, gfp_t gfp);
void dn_nsp_return_disc(struct sk_buff *skb, unsigned char type,
			unsigned short reason);
void dn_nsp_send_link(struct sock *sk, unsigned char lsflags, char fcval);
void dn_nsp_send_conninit(struct sock *sk, unsigned char flags);

void dn_nsp_output(struct sock *sk);
int dn_nsp_check_xmit_queue(struct sock *sk, struct sk_buff *skb,
			    struct sk_buff_head *q, unsigned short acknum);
void dn_nsp_queue_xmit(struct sock *sk, struct sk_buff *skb, gfp_t gfp,
		       int oob);
unsigned long dn_nsp_persist(struct sock *sk);
int dn_nsp_xmit_timeout(struct sock *sk);

int dn_nsp_rx(struct sk_buff *);
int dn_nsp_backlog_rcv(struct sock *sk, struct sk_buff *skb);

struct sk_buff *dn_alloc_skb(struct sock *sk, int size, gfp_t pri);
struct sk_buff *dn_alloc_send_skb(struct sock *sk, size_t *size, int noblock,
				  long timeo, int *err);

#define NSP_REASON_OK 0		/* No error */
#define NSP_REASON_NR 1		/* No resources */
#define NSP_REASON_UN 2		/* Unrecognised node name */
#define NSP_REASON_SD 3		/* Node shutting down */
#define NSP_REASON_ID 4		/* Invalid destination end user */
#define NSP_REASON_ER 5		/* End user lacks resources */
#define NSP_REASON_OB 6		/* Object too busy */
#define NSP_REASON_US 7		/* Unspecified error */
#define NSP_REASON_TP 8		/* Third-Party abort */
#define NSP_REASON_EA 9		/* End user has aborted the link */
#define NSP_REASON_IF 10	/* Invalid node name format */
#define NSP_REASON_LS 11	/* Local node shutdown */
#define NSP_REASON_LL 32	/* Node lacks logical-link resources */
#define NSP_REASON_LE 33	/* End user lacks logical-link resources */
#define NSP_REASON_UR 34	/* Unacceptable RQSTRID or PASSWORD field */
#define NSP_REASON_UA 36	/* Unacceptable ACCOUNT field */
#define NSP_REASON_TM 38	/* End user timed out logical link */
#define NSP_REASON_NU 39	/* Node unreachable */
#define NSP_REASON_NL 41	/* No-link message */
#define NSP_REASON_DC 42	/* Disconnect confirm */
#define NSP_REASON_IO 43	/* Image data field overflow */

#define NSP_DISCINIT 0x38
#define NSP_DISCCONF 0x48

/*------------------------- NSP - messages ------------------------------*/
/* Data Messages */
/*---------------*/

/* Data Messages    (data segment/interrupt/link service)               */

struct nsp_data_seg_msg {
	__u8   msgflg;
	__le16 dstaddr;
	__le16 srcaddr;
} __packed;

struct nsp_data_opt_msg {
	__le16 acknum;
	__le16 segnum;
	__le16 lsflgs;
} __packed;

struct nsp_data_opt_msg1 {
	__le16 acknum;
	__le16 segnum;
} __packed;


/* Acknowledgment Message (data/other data)                             */
struct nsp_data_ack_msg {
	__u8   msgflg;
	__le16 dstaddr;
	__le16 srcaddr;
	__le16 acknum;
} __packed;

/* Connect Acknowledgment Message */
struct  nsp_conn_ack_msg {
	__u8 msgflg;
	__le16 dstaddr;
} __packed;


/* Connect Initiate/Retransmit Initiate/Connect Confirm */
struct  nsp_conn_init_msg {
	__u8   msgflg;
#define NSP_CI      0x18            /* Connect Initiate     */
#define NSP_RCI     0x68            /* Retrans. Conn Init   */
	__le16 dstaddr;
	__le16 srcaddr;
	__u8   services;
#define NSP_FC_NONE   0x00            /* Flow Control None    */
#define NSP_FC_SRC    0x04            /* Seg Req. Count       */
#define NSP_FC_SCMC   0x08            /* Sess. Control Mess   */
#define NSP_FC_MASK   0x0c            /* FC type mask         */
	__u8   info;
	__le16 segsize;
} __packed;

/* Disconnect Initiate/Disconnect Confirm */
struct  nsp_disconn_init_msg {
	__u8   msgflg;
	__le16 dstaddr;
	__le16 srcaddr;
	__le16 reason;
} __packed;



struct  srcobj_fmt {
	__u8   format;
	__u8   task;
	__le16 grpcode;
	__le16 usrcode;
	__u8   dlen;
} __packed;

/*
 * A collection of functions for manipulating the sequence
 * numbers used in NSP. Similar in operation to the functions
 * of the same name in TCP.
 */
static __inline__ int dn_before(__u16 seq1, __u16 seq2)
{
        seq1 &= 0x0fff;
        seq2 &= 0x0fff;

        return (int)((seq1 - seq2) & 0x0fff) > 2048;
}


static __inline__ int dn_after(__u16 seq1, __u16 seq2)
{
        seq1 &= 0x0fff;
        seq2 &= 0x0fff;

        return (int)((seq2 - seq1) & 0x0fff) > 2048;
}

static __inline__ int dn_equal(__u16 seq1, __u16 seq2)
{
        return ((seq1 ^ seq2) & 0x0fff) == 0;
}

static __inline__ int dn_before_or_equal(__u16 seq1, __u16 seq2)
{
	return (dn_before(seq1, seq2) || dn_equal(seq1, seq2));
}

static __inline__ void seq_add(__u16 *seq, __u16 off)
{
        (*seq) += off;
        (*seq) &= 0x0fff;
}

static __inline__ int seq_next(__u16 seq1, __u16 seq2)
{
	return dn_equal(seq1 + 1, seq2);
}

/*
 * Can we delay the ack ?
 */
static __inline__ int sendack(__u16 seq)
{
        return (int)((seq & 0x1000) ? 0 : 1);
}

/*
 * Is socket congested ?
 */
static __inline__ int dn_congested(struct sock *sk)
{
        return atomic_read(&sk->sk_rmem_alloc) > (sk->sk_rcvbuf >> 1);
}

#define DN_MAX_NSP_DATA_HEADER (11)

#endif /* _NET_DN_NSP_H */

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9p Folder 0755
bluetooth Folder 0755
caif Folder 0755
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netfilter Folder 0755
netns Folder 0755
nfc Folder 0755
phonet Folder 0755
sctp Folder 0755
tc_act Folder 0755
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Space.h File 1.15 KB 0644
act_api.h File 6.38 KB 0644
addrconf.h File 12.63 KB 0644
af_ieee802154.h File 1.55 KB 0644
af_rxrpc.h File 2.79 KB 0644
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ah.h File 382 B 0644
arp.h File 2 KB 0644
atmclip.h File 1.48 KB 0644
ax25.h File 15.02 KB 0644
ax88796.h File 998 B 0644
bond_3ad.h File 9.79 KB 0644
bond_alb.h File 6.6 KB 0644
bond_options.h File 3.92 KB 0644
bonding.h File 19.1 KB 0644
busy_poll.h File 3.8 KB 0644
calipso.h File 2.15 KB 0644
cfg80211-wext.h File 1.95 KB 0644
cfg80211.h File 221.24 KB 0644
cfg802154.h File 10.89 KB 0644
checksum.h File 4.76 KB 0644
cipso_ipv4.h File 8.2 KB 0644
cls_cgroup.h File 2.15 KB 0644
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codel_impl.h File 7.98 KB 0644
codel_qdisc.h File 2.9 KB 0644
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dcbevent.h File 1.26 KB 0644
dcbnl.h File 4.2 KB 0644
devlink.h File 13.25 KB 0644
dn.h File 6.88 KB 0644
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dsfield.h File 1.11 KB 0644
dst.h File 13.48 KB 0644
dst_cache.h File 2.53 KB 0644
dst_metadata.h File 5.39 KB 0644
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fq_impl.h File 6.9 KB 0644
garp.h File 2.62 KB 0644
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genetlink.h File 11.3 KB 0644
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gre.h File 2.99 KB 0644
gro_cells.h File 443 B 0644
gtp.h File 633 B 0644
gue.h File 3.23 KB 0644
hwbm.h File 937 B 0644
icmp.h File 2.01 KB 0644
ieee80211_radiotap.h File 6.63 KB 0644
ieee802154_netdev.h File 9.14 KB 0644
if_inet6.h File 6.13 KB 0644
ife.h File 1.06 KB 0644
ila.h File 498 B 0644
inet6_connection_sock.h File 976 B 0644
inet6_hashtables.h File 3.7 KB 0644
inet_common.h File 1.89 KB 0644
inet_connection_sock.h File 10.48 KB 0644
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inet_frag.h File 4.51 KB 0644
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inetpeer.h File 3.29 KB 0644
ip.h File 18.51 KB 0644
ip6_checksum.h File 2.89 KB 0644
ip6_fib.h File 10.04 KB 0644
ip6_route.h File 7.63 KB 0644
ip6_tunnel.h File 4.72 KB 0644
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ipcomp.h File 659 B 0644
ipconfig.h File 811 B 0644
ipv6.h File 29.97 KB 0644
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lapb.h File 4.75 KB 0644
lib80211.h File 3.92 KB 0644
llc.h File 4.41 KB 0644
llc_c_ac.h File 9.31 KB 0644
llc_c_ev.h File 10.68 KB 0644
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