232 lines
6.9 KiB
C
232 lines
6.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _NET_DN_H
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#define _NET_DN_H
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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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struct dn_scp /* Session Control Port */
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{
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unsigned char state;
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#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;
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__le16 addrrem;
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__u16 numdat;
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__u16 numoth;
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__u16 numoth_rcv;
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__u16 numdat_rcv;
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__u16 ackxmt_dat;
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__u16 ackxmt_oth;
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__u16 ackrcv_dat;
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__u16 ackrcv_oth;
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__u8 flowrem_sw;
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__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;
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__u16 flowrem_oth;
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__u16 flowloc_dat;
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__u16 flowloc_oth;
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__u8 services_rem;
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__u8 services_loc;
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__u8 info_rem;
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__u8 info_loc;
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__u16 segsize_rem;
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__u16 segsize_loc;
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__u8 nonagle;
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__u8 multi_ireq;
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__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;
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struct optdata_dn conndata_out;
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struct optdata_dn discdata_in;
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struct optdata_dn discdata_out;
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struct accessdata_dn accessdata;
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struct sockaddr_dn addr; /* Local address */
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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
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* docs, nor is any back off algorithm. Here we follow well
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* known tcp algorithms with a few small variations.
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*
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* snd_window: Max number of packets we send before we wait for
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* an ack to come back. This will become part of a
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* more complicated scheme when we support flow
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* control.
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*
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* nsp_srtt: Round-Trip-Time (x8) in jiffies. This is a rolling
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* average.
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* nsp_rttvar: Round-Trip-Time-Varience (x4) in jiffies. This is the
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* varience of the smoothed average (but calculated in
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* a simpler way than for normal statistical varience
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* calculations).
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*
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* nsp_rxtshift: Backoff counter. Value is zero normally, each time
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* a packet is lost is increases by one until an ack
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* is received. Its used to index an array of backoff
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* multipliers.
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*/
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#define NSP_MIN_WINDOW 1
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#define NSP_MAX_WINDOW (0x07fe)
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unsigned long max_window;
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unsigned long snd_window;
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#define NSP_INITIAL_SRTT (HZ)
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unsigned long nsp_srtt;
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#define NSP_INITIAL_RTTVAR (HZ*3)
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unsigned long nsp_rttvar;
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#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
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*/
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struct sk_buff_head data_xmit_queue;
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struct sk_buff_head other_xmit_queue;
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/*
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* Input queue for other data
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*/
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struct sk_buff_head other_receive_queue;
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int other_report;
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/*
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* Stuff to do with the slow timer
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*/
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unsigned long stamp; /* time of last transmit */
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unsigned long persist;
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int (*persist_fxn)(struct sock *sk);
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unsigned long keepalive;
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void (*keepalive_fxn)(struct sock *sk);
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};
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static inline struct dn_scp *DN_SK(struct sock *sk)
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{
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return (struct dn_scp *)(sk + 1);
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}
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/*
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* src,dst : Source and Destination DECnet addresses
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* hops : Number of hops through the network
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* dst_port, src_port : NSP port numbers
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* services, info : Useful data extracted from conninit messages
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* rt_flags : Routing flags byte
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* nsp_flags : NSP layer flags byte
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* segsize : Size of segment
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* segnum : Number, for data, otherdata and linkservice
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* xmit_count : Number of times we've transmitted this skb
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* stamp : Time stamp of most recent transmission, used in RTT calculations
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* iif: Input interface number
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*
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* As a general policy, this structure keeps all addresses in network
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* byte order, and all else in host byte order. Thus dst, src, dst_port
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* and src_port are in network order. All else is in host order.
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*
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*/
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#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;
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__le16 src;
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__u16 hops;
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__le16 dst_port;
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__le16 src_port;
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__u8 services;
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__u8 info;
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__u8 rt_flags;
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__u8 nsp_flags;
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__u16 segsize;
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__u16 segnum;
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__u16 xmit_count;
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unsigned long stamp;
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int iif;
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};
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static inline __le16 dn_eth2dn(const 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;
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ethaddr[1] = 0x00;
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ethaddr[2] = 0x04;
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ethaddr[3] = 0x00;
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ethaddr[4] = (__u8)(a & 0xff);
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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;
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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);
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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);
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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 *);
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int dn_destroy_timer(struct sock *sk);
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int dn_sockaddr2username(struct sockaddr_dn *addr, unsigned char *buf,
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unsigned char type);
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int dn_username2sockaddr(unsigned char *data, int len, struct sockaddr_dn *addr,
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unsigned char *type);
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void dn_start_slow_timer(struct sock *sk);
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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;
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extern int decnet_time_wait;
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extern int decnet_dn_count;
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extern int decnet_di_count;
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extern int decnet_dr_count;
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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];
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extern int sysctl_decnet_rmem[3];
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#endif /* _NET_DN_H */
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