[mirror_ubuntu-bionic-kernel.git] / include / net / dn.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _NET_DN_H
#define _NET_DN_H

#include <linux/dn.h>
#include <net/sock.h>
#include <net/flow.h>
#include <asm/byteorder.h>
#include <asm/unaligned.h>

struct dn_scp                                   /* Session Control Port */
{
        unsigned char           state;
#define DN_O     1                      /* Open                 */
#define DN_CR    2                      /* Connect Receive      */
#define DN_DR    3                      /* Disconnect Reject    */
#define DN_DRC   4                      /* Discon. Rej. Complete*/
#define DN_CC    5                      /* Connect Confirm      */
#define DN_CI    6                      /* Connect Initiate     */
#define DN_NR    7                      /* No resources         */
#define DN_NC    8                      /* No communication     */
#define DN_CD    9                      /* Connect Delivery     */
#define DN_RJ    10                     /* Rejected             */
#define DN_RUN   11                     /* Running              */
#define DN_DI    12                     /* Disconnect Initiate  */
#define DN_DIC   13                     /* Disconnect Complete  */
#define DN_DN    14                     /* Disconnect Notificat */
#define DN_CL    15                     /* Closed               */
#define DN_CN    16                     /* Closed Notification  */

        __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;
#define DN_SEND         2
#define DN_DONTSEND     1
#define DN_NOCHANGE     0
	__u16		flowrem_dat;
	__u16		flowrem_oth;
	__u16		flowloc_dat;
	__u16		flowloc_oth;
	__u8		services_rem;
	__u8		services_loc;
	__u8		info_rem;
	__u8		info_loc;

	__u16		segsize_rem;
	__u16		segsize_loc;

	__u8		nonagle;
	__u8		multi_ireq;
	__u8		accept_mode;
	unsigned long		seg_total; /* Running total of current segment */

	struct optdata_dn     conndata_in;
	struct optdata_dn     conndata_out;
	struct optdata_dn     discdata_in;
	struct optdata_dn     discdata_out;
        struct accessdata_dn  accessdata;

        struct sockaddr_dn addr; /* Local address  */
	struct sockaddr_dn peer; /* Remote address */

	/*
	 * 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
#define NSP_MAX_WINDOW (0x07fe)
	unsigned long max_window;
	unsigned long snd_window;
#define NSP_INITIAL_SRTT (HZ)
	unsigned long nsp_srtt;
#define NSP_INITIAL_RTTVAR (HZ*3)
	unsigned long nsp_rttvar;
#define NSP_MAXRXTSHIFT 12
	unsigned long nsp_rxtshift;

	/*
	 * Output queues, one for data, one for otherdata/linkservice
	 */
	struct sk_buff_head data_xmit_queue;
	struct sk_buff_head other_xmit_queue;

	/*
	 * Input queue for other data
	 */
	struct sk_buff_head other_receive_queue;
	int other_report;

	/*
	 * 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);

};

static inline struct dn_scp *DN_SK(struct sock *sk)
{
	return (struct dn_scp *)(sk + 1);
}

/*
 * 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)
struct dn_skb_cb {
	__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;
	unsigned long stamp;
	int iif;
};

static inline __le16 dn_eth2dn(unsigned char *ethaddr)
{
	return get_unaligned((__le16 *)(ethaddr + 4));
}

static inline __le16 dn_saddr2dn(struct sockaddr_dn *saddr)
{
	return *(__le16 *)saddr->sdn_nodeaddr;
}

static inline void dn_dn2eth(unsigned char *ethaddr, __le16 addr)
{
	__u16 a = le16_to_cpu(addr);
	ethaddr[0] = 0xAA;
	ethaddr[1] = 0x00;
	ethaddr[2] = 0x04;
	ethaddr[3] = 0x00;
	ethaddr[4] = (__u8)(a & 0xff);
	ethaddr[5] = (__u8)(a >> 8);
}

static inline void dn_sk_ports_copy(struct flowidn *fld, struct dn_scp *scp)
{
	fld->fld_sport = scp->addrloc;
	fld->fld_dport = scp->addrrem;
}

unsigned int dn_mss_from_pmtu(struct net_device *dev, int mtu);
void dn_register_sysctl(void);
void dn_unregister_sysctl(void);

#define DN_MENUVER_ACC 0x01
#define DN_MENUVER_USR 0x02
#define DN_MENUVER_PRX 0x04
#define DN_MENUVER_UIC 0x08

struct sock *dn_sklist_find_listener(struct sockaddr_dn *addr);
struct sock *dn_find_by_skb(struct sk_buff *skb);
#define DN_ASCBUF_LEN 9
char *dn_addr2asc(__u16, char *);
int dn_destroy_timer(struct sock *sk);

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);

void dn_start_slow_timer(struct sock *sk);
void dn_stop_slow_timer(struct sock *sk);

extern __le16 decnet_address;
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;

extern long sysctl_decnet_mem[3];
extern int sysctl_decnet_wmem[3];
extern int sysctl_decnet_rmem[3];

#endif /* _NET_DN_H */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
1da177e4 LT	2	#ifndef _NET_DN_H
	3	#define _NET_DN_H
	4
	5	#include <linux/dn.h>
	6	#include <net/sock.h>
4c5e4036	7	#include <net/flow.h>
1da177e4	8	#include <asm/byteorder.h>
475ad8e2	9	#include <asm/unaligned.h>
1da177e4 LT	10
	11	struct dn_scp /* Session Control Port */
	12	{
	13	unsigned char state;
	14	#define DN_O 1 /* Open */
	15	#define DN_CR 2 /* Connect Receive */
	16	#define DN_DR 3 /* Disconnect Reject */
	17	#define DN_DRC 4 /* Discon. Rej. Complete*/
	18	#define DN_CC 5 /* Connect Confirm */
	19	#define DN_CI 6 /* Connect Initiate */
	20	#define DN_NR 7 /* No resources */
	21	#define DN_NC 8 /* No communication */
	22	#define DN_CD 9 /* Connect Delivery */
	23	#define DN_RJ 10 /* Rejected */
	24	#define DN_RUN 11 /* Running */
	25	#define DN_DI 12 /* Disconnect Initiate */
	26	#define DN_DIC 13 /* Disconnect Complete */
	27	#define DN_DN 14 /* Disconnect Notificat */
	28	#define DN_CL 15 /* Closed */
	29	#define DN_CN 16 /* Closed Notification */
	30
c4ea94ab SW	31	__le16 addrloc;
	32	__le16 addrrem;
	33	__u16 numdat;
	34	__u16 numoth;
	35	__u16 numoth_rcv;
	36	__u16 numdat_rcv;
	37	__u16 ackxmt_dat;
	38	__u16 ackxmt_oth;
	39	__u16 ackrcv_dat;
	40	__u16 ackrcv_oth;
	41	__u8 flowrem_sw;
	42	__u8 flowloc_sw;
1da177e4 LT	43	#define DN_SEND 2
	44	#define DN_DONTSEND 1
	45	#define DN_NOCHANGE 0
c4ea94ab SW	46	__u16 flowrem_dat;
	47	__u16 flowrem_oth;
	48	__u16 flowloc_dat;
	49	__u16 flowloc_oth;
	50	__u8 services_rem;
	51	__u8 services_loc;
	52	__u8 info_rem;
	53	__u8 info_loc;
	54
	55	__u16 segsize_rem;
	56	__u16 segsize_loc;
	57
	58	__u8 nonagle;
	59	__u8 multi_ireq;
	60	__u8 accept_mode;
1da177e4 LT	61	unsigned long seg_total; /* Running total of current segment */
	62
	63	struct optdata_dn conndata_in;
	64	struct optdata_dn conndata_out;
	65	struct optdata_dn discdata_in;
	66	struct optdata_dn discdata_out;
	67	struct accessdata_dn accessdata;
	68
	69	struct sockaddr_dn addr; /* Local address */
	70	struct sockaddr_dn peer; /* Remote address */
	71
	72	/*
	73	* In this case the RTT estimation is not specified in the
	74	* docs, nor is any back off algorithm. Here we follow well
	75	* known tcp algorithms with a few small variations.
	76	*
	77	* snd_window: Max number of packets we send before we wait for
	78	* an ack to come back. This will become part of a
	79	* more complicated scheme when we support flow
	80	* control.
	81	*
	82	* nsp_srtt: Round-Trip-Time (x8) in jiffies. This is a rolling
	83	* average.
	84	* nsp_rttvar: Round-Trip-Time-Varience (x4) in jiffies. This is the
	85	* varience of the smoothed average (but calculated in
	86	* a simpler way than for normal statistical varience
	87	* calculations).
	88	*
	89	* nsp_rxtshift: Backoff counter. Value is zero normally, each time
	90	* a packet is lost is increases by one until an ack
	91	* is received. Its used to index an array of backoff
	92	* multipliers.
	93	*/
	94	#define NSP_MIN_WINDOW 1
	95	#define NSP_MAX_WINDOW (0x07fe)
	96	unsigned long max_window;
	97	unsigned long snd_window;
	98	#define NSP_INITIAL_SRTT (HZ)
	99	unsigned long nsp_srtt;
	100	#define NSP_INITIAL_RTTVAR (HZ*3)
	101	unsigned long nsp_rttvar;
	102	#define NSP_MAXRXTSHIFT 12
	103	unsigned long nsp_rxtshift;
	104
	105	/*
	106	* Output queues, one for data, one for otherdata/linkservice
	107	*/
	108	struct sk_buff_head data_xmit_queue;
	109	struct sk_buff_head other_xmit_queue;
	110
	111	/*
	112	* Input queue for other data
	113	*/
	114	struct sk_buff_head other_receive_queue;
	115	int other_report;
	116
	117	/*
	118	* Stuff to do with the slow timer
	119	*/
	120	unsigned long stamp; /* time of last transmit */
	121	unsigned long persist;
	122	int (persist_fxn)(struct sock sk);
	123	unsigned long keepalive;
	124	void (keepalive_fxn)(struct sock sk);
125
1da177e4 LT	126	};
	127
	128	static inline struct dn_scp DN_SK(struct sock sk)
	129	{
	130	return (struct dn_scp *)(sk + 1);
	131	}
	132
	133	/*
	134	* src,dst : Source and Destination DECnet addresses
	135	* hops : Number of hops through the network
	136	* dst_port, src_port : NSP port numbers
	137	* services, info : Useful data extracted from conninit messages
	138	* rt_flags : Routing flags byte
	139	* nsp_flags : NSP layer flags byte
	140	* segsize : Size of segment
	141	* segnum : Number, for data, otherdata and linkservice
	142	* xmit_count : Number of times we've transmitted this skb
	143	* stamp : Time stamp of most recent transmission, used in RTT calculations
	144	* iif: Input interface number
	145	*
	146	* As a general policy, this structure keeps all addresses in network
	147	* byte order, and all else in host byte order. Thus dst, src, dst_port
	148	* and src_port are in network order. All else is in host order.
	149	*
	150	*/
	151	#define DN_SKB_CB(skb) ((struct dn_skb_cb *)(skb)->cb)
	152	struct dn_skb_cb {
c4ea94ab SW	153	__le16 dst;
	154	__le16 src;
	155	__u16 hops;
	156	__le16 dst_port;
	157	__le16 src_port;
	158	__u8 services;
	159	__u8 info;
	160	__u8 rt_flags;
	161	__u8 nsp_flags;
	162	__u16 segsize;
	163	__u16 segnum;
	164	__u16 xmit_count;
1da177e4 LT	165	unsigned long stamp;
	166	int iif;
	167	};
	168
c4ea94ab	169	static inline __le16 dn_eth2dn(unsigned char *ethaddr)
1da177e4	170	{
c4106aa8	171	return get_unaligned((__le16 *)(ethaddr + 4));
1da177e4 LT	172	}
1da177e4 LT	173
c4ea94ab	174	static inline __le16 dn_saddr2dn(struct sockaddr_dn *saddr)
1da177e4	175	{
c4ea94ab	176	return (__le16 )saddr->sdn_nodeaddr;
1da177e4 LT	177	}
1da177e4 LT	178
c4ea94ab	179	static inline void dn_dn2eth(unsigned char *ethaddr, __le16 addr)
1da177e4	180	{
c4106aa8	181	__u16 a = le16_to_cpu(addr);
1da177e4 LT	182	ethaddr[0] = 0xAA;
	183	ethaddr[1] = 0x00;
	184	ethaddr[2] = 0x04;
	185	ethaddr[3] = 0x00;
c4ea94ab SW	186	ethaddr[4] = (__u8)(a & 0xff);
c4ea94ab SW	187	ethaddr[5] = (__u8)(a >> 8);
1da177e4 LT	188	}
1da177e4 LT	189
bef55aeb	190	static inline void dn_sk_ports_copy(struct flowidn fld, struct dn_scp scp)
1da177e4	191	{
bef55aeb DM	192	fld->fld_sport = scp->addrloc;
bef55aeb DM	193	fld->fld_dport = scp->addrrem;
1da177e4 LT	194	}
1da177e4 LT	195
59ddd965	196	unsigned int dn_mss_from_pmtu(struct net_device *dev, int mtu);
ab3301bd RK	197	void dn_register_sysctl(void);
ab3301bd RK	198	void dn_unregister_sysctl(void);
1da177e4 LT	199
	200	#define DN_MENUVER_ACC 0x01
	201	#define DN_MENUVER_USR 0x02
	202	#define DN_MENUVER_PRX 0x04
	203	#define DN_MENUVER_UIC 0x08
	204
59ddd965 JP	205	struct sock dn_sklist_find_listener(struct sockaddr_dn addr);
59ddd965 JP	206	struct sock dn_find_by_skb(struct sk_buff skb);
1da177e4	207	#define DN_ASCBUF_LEN 9
59ddd965 JP	208	char dn_addr2asc(__u16, char );
59ddd965 JP	209	int dn_destroy_timer(struct sock *sk);
1da177e4	210
59ddd965 JP	211	int dn_sockaddr2username(struct sockaddr_dn addr, unsigned char buf,
	212	unsigned char type);
	213	int dn_username2sockaddr(unsigned char data, int len, struct sockaddr_dn addr,
	214	unsigned char *type);
1da177e4	215
59ddd965 JP	216	void dn_start_slow_timer(struct sock *sk);
59ddd965 JP	217	void dn_stop_slow_timer(struct sock *sk);
1da177e4	218
c4ea94ab	219	extern __le16 decnet_address;
1da177e4 LT	220	extern int decnet_debug_level;
	221	extern int decnet_time_wait;
	222	extern int decnet_dn_count;
	223	extern int decnet_di_count;
	224	extern int decnet_dr_count;
	225	extern int decnet_no_fc_max_cwnd;
	226
8d987e5c	227	extern long sysctl_decnet_mem[3];
1f12bcc9 SW	228	extern int sysctl_decnet_wmem[3];
	229	extern int sysctl_decnet_rmem[3];
	230
1da177e4	231	#endif /* _NET_DN_H */